WO2019062967A1 - Battery pack, battery heat management system, and vehicle - Google Patents

Abstract

Provided are a battery pack (1000), a battery heat management system (10000) and a vehicle (100000). The battery pack (1000) comprises: a box body (1); multiple battery modules (31), the multiple battery modules (31) being divided into multiple rows of battery modules (31), and each of the battery modules (31) being provided with a heat exchange member (312); multiple heat exchange pipe assemblies, wherein each row of the battery modules (31) at least corresponds to one heat exchange pipe assembly, each heat exchange pipe assembly comprises heat exchange pipes (32) and two branch pipes, any one of the heat exchange pipes (32) is in communication between the heat exchange members (312) corresponding to two adjacent battery modules (31) in one row of battery modules (31), and the branch pipes are connected at an inlet or outlet of the heat exchange members (312) of the battery modules (31) located at an end portion of each row of the battery modules (31); and a main water inlet pipe (33) and a main water outlet pipe (34), the main water inlet pipe (33) and the main water outlet pipe (34) being respectively connected to the two branch pipes of each heat exchange pipe assembly.

Description

Battery pack and battery thermal management system and vehicle

Cross-reference to related applications

This application claims the priority of the Chinese Patent Application No. "201721290008.1", which is filed on September 30, 2017 by BYD Co., Ltd., entitled "Battery Pack and Battery Thermal Management System and Vehicle".

Technical field

The present disclosure relates to the field of vehicle technology, and in particular to a battery pack and a battery thermal management system having the same and a vehicle having the battery thermal management system.

Background technique

At present, electric vehicles are heated due to battery discharge or charging, and the battery pack is generally sealed, so that the air flow inside the battery pack is poor, and the heat transfer efficiency is low, which causes the temperature of the power battery to rise, which affects the cycle life of the battery.

Public content

The present disclosure aims to solve at least one of the technical problems in the related art to some extent.

To this end, an object of the present disclosure is to provide a battery pack, which has a good heat exchange effect and a suitable operating temperature.

Another object of the present disclosure is to provide a battery thermal management system.

Yet another object of the present disclosure is to propose a vehicle.

A battery pack includes: a box; a plurality of battery modules, the plurality of battery modules are disposed in the box, the plurality of battery modules are divided into a plurality of rows of battery modules, and each of the battery modules The group is provided with a heat exchange member; a plurality of heat exchange tube assemblies, each of the battery modules corresponding to at least one of the heat exchange tube assemblies, each of the heat exchange tube assemblies comprising a plurality of independent heat exchange tubes and two a branch pipe, each of the heat exchange tubes of each of the heat exchange tube assemblies is connected between heat exchange members of two adjacent battery modules in a row of battery modules, each of the exchanges The branch pipe of the heat pipe assembly is connected at an inlet or an outlet of a heat exchange member of the battery module at an end of each row of battery modules; a total inlet pipe and a total outlet pipe, the total inlet pipe and the inlet The total outlet pipes are respectively connected to the two branch pipes of each of the heat exchange tube assemblies.

Therefore, when the battery pack is in operation, the total inlet pipe can supply the heat exchange liquid into the plurality of heat exchange tube assemblies, and the heat exchange liquid enters the plurality of heat exchange tube assemblies respectively, thereby flowing through each of the battery modules. The heat exchange member exchanges heat with the battery core in the heat exchange member, thereby improving the operating temperature of the battery core, prolonging the working life of the battery core, and the temperature difference between the battery modules is small, and the temperature of the battery pack is Uniform distribution and good work reliability.

In some examples of the present disclosure, each of the heat exchange members is provided with an interface for communicating with the heat exchange tube on a corresponding one of the battery modules.

In some examples of the disclosure, the heat exchange tubes are bellows.

In some examples of the present disclosure, the upper surface of the battery module is provided with a limiting member that limits the degree of freedom of the heat exchange tube.

In some examples of the present disclosure, the limiting member is a snap ring, and the heat exchange tube is snapped into the snap ring.

In some examples of the present disclosure, the heat exchange liquids in the plurality of heat exchange tube assemblies flow in the same direction, the total water inlet pipe is located at one side of the plurality of battery modules, and the total outlet water pipe is located at the plurality of The opposite side of the battery module.

In some examples of the present disclosure, each row of battery modules corresponds to two heat exchange tube assemblies, and the flow direction of the two heat exchange tube assemblies alternates.

In some examples of the present disclosure, the total inlet pipe and the total outlet pipe are disposed on opposite sides of the plurality of battery modules.

In some examples of the present disclosure, the branch tube is L-shaped to fit the side and upper surfaces of the battery module.

In some examples of the present disclosure, at least one length of the pipe section of the total inlet pipe and the total outlet pipe is rectangular.

In some examples of the present disclosure, each of the heat exchange tubes is provided with a joint at both ends thereof.

In some examples of the present disclosure, each of the battery modules includes a battery pack, the heat exchange member is a heat exchange plate, and the heat exchange plate is disposed at one side of the battery core group.

In some examples of the present disclosure, a thermal pad is interposed between the heat exchange plate and the set of cells.

A battery thermal management system comprising: the battery pack; a heat exchange circulation pipeline, two ends of the heat exchange circulation pipeline are respectively connected to the total inlet pipe and the total outlet pipe; a refrigeration system and a heating system The refrigeration system includes a compressor, a condenser, and a heat exchanger, the heat exchanger including a first heat exchange channel and a second heat exchange channel that exchange heat with each other, the first heat exchange channel being connected in series to the compression Between the machine and the condenser, the second heat exchange passage is a part of the heat exchange circulation duct, the warm air system is for heating air, and the warm air system includes a warm air duct, the warm air The conduit is selectively communicable with the heat exchange circulation passage; a first PTC heater for selectively heating the heat exchange liquid in the heat exchange circulation passage.

In some examples of the present disclosure, the refrigeration system further includes a third heat exchange passage connected in series between the compressor and the condenser, the third heat exchange passage and the The warm air ducts exchange heat with each other.

In some examples of the disclosure, the battery thermal management system further includes a first control valve, the warm air duct and the heat exchange circulation passage being selectively communicable by the first control valve.

In some examples of the present disclosure, the first control valve regulates a flow rate of heat exchange liquid flowing from the heat exchange circulation passage into the total water inlet pipe, and adjusts flow from the heat exchange circulation passage into the warm air passage The flow of heat exchange liquid.

In some examples of the present disclosure, the first control valve includes a first valve port, a second valve port, and a third valve port, a first valve port of the first control valve and the first PTC heater An outlet port is connected, a second valve port of the first control valve is in communication with the warm air duct, a third valve port of the first control valve is in communication with the total inlet pipe, and the first control valve is first The valve port is in communication with the second valve port of the first control valve and the flow rate is adjustable, and the first valve port of the first control valve is in communication with the third valve port of the first control valve and the flow rate is adjustable.

In some examples of the present disclosure, the battery thermal management system further includes a second control valve, the total outlet pipe selectively connecting the inlet of the first PTC heater and the One of the total inlet pipes.

In some examples of the present disclosure, the second control valve includes a first valve port, a second valve port, and a third valve port, and the first valve port of the second control valve is in communication with the total outlet pipe, a second valve port of the second control valve is in communication with the total inlet pipe, a third valve port of the second control valve is in communication with the first PTC heater, and a first valve port of the second control valve A second valve port of the second control valve or a third valve port of the second control valve may be selectively communicated.

In some examples of the disclosure, the warm air system further includes a second PTC heater that selectively heats heat exchange liquid within the warm air duct.

A vehicle includes the battery thermal management system.

The additional aspects and advantages of the present disclosure will be set forth in part in the description which follows.

DRAWINGS

1 is a schematic diagram of one embodiment of a battery thermal management system for a vehicle in accordance with the present disclosure;

2 is a schematic structural view of a battery module according to an embodiment of the present disclosure;

3 is a schematic structural view of a first perspective of an interior of a battery module in accordance with an embodiment of the present disclosure;

4 is a schematic structural view of a second viewing angle of an interior of a battery module according to an embodiment of the present disclosure;

5 is a schematic structural view of a third perspective of an interior of a battery module according to an embodiment of the present disclosure;

6 is a flow path diagram of a heat exchange medium of a battery pack in accordance with an embodiment of the present disclosure;

7 is a schematic structural view of a first perspective of a battery pack according to an embodiment of the present disclosure;

8 is a schematic structural view of a second perspective view of a battery pack according to an embodiment of the present disclosure;

9 is a schematic structural view of a third perspective of a battery pack according to an embodiment of the present disclosure;

10 is a schematic illustration of another embodiment of a battery thermal management system for a vehicle in accordance with the present disclosure;

11 is a schematic structural view of a first perspective view of a battery pack according to another embodiment of the present disclosure;

FIG. 12 is a schematic structural view of a second perspective view of a battery pack according to another embodiment of the present disclosure; FIG.

13 is a schematic structural view of a first perspective of an interior of a battery module in accordance with an embodiment of the present disclosure;

14 is a schematic structural view of a second viewing angle of an interior of a battery module according to an embodiment of the present disclosure;

FIG. 15 is a schematic diagram of a battery module according to still another embodiment of the present disclosure; FIG.

16 is a schematic structural view of a first perspective of a battery module according to still another embodiment of the present disclosure; and

17 is a schematic structural view of a second viewing angle of a battery module according to still another embodiment of the present disclosure.

Detailed ways

The embodiments of the present disclosure are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative, and are not intended to be construed as limiting.

A battery pack 1000 according to an embodiment of the present disclosure, which can be applied to a vehicle as a power battery, is described in detail below with reference to the accompanying drawings.

As shown in FIGS. 7-9 and 11 and 12, the battery pack 1000 according to an embodiment of the present disclosure may include: a case 1, a plurality of battery modules 31, a plurality of heat exchange tube assemblies, a total water inlet pipe 33, and The total outlet pipe 34 and the plurality of battery modules 31 are disposed in the casing 1. The casing 1 can function to protect and fix the plurality of battery modules 31.

As shown in FIG. 1 , FIG. 3 to FIG. 5 , a plurality of battery modules 31 are all part of the battery 3 , and the plurality of battery modules 31 are divided into a plurality of rows of battery modules 31 , and each of the battery modules 31 is provided with a heat exchange component. 312, the battery module 31 is distributed with a battery core 311, and the heat exchange member 312 can exchange heat with the battery core 311 to improve the operating temperature of the battery core 311. For example, when the battery core 311 is operated and the temperature is high, the heat exchange member 312 The heat exchange liquid may be supplied to lower the operating temperature of the battery core 311; for example, when the battery core 311 is operated and the temperature is low, the heat exchange member 312 may supply the high temperature heat exchange liquid to raise the operating temperature of the battery core 311.

Each row of battery modules 31 corresponds to at least one heat exchange tube assembly. For example, as shown in FIGS. 7-9, each row of battery modules 31 corresponds to one heat exchange tube assembly, and as shown in FIG. 11 and FIG. Each row of battery modules 31 corresponds to two heat exchange tube assemblies. Each heat exchange tube assembly includes a plurality of independent heat exchange tubes 32, and a plurality of independent heat exchange tubes 32 may be spaced apart in the row direction of the battery modules 31, and each of the heat exchange tube assemblies The root heat exchange tubes 32 are connected between the heat exchange members 312 of the adjacent two battery modules 31 in the corresponding row of battery modules 31. Thus, each heat exchange tube assembly can connect the heat exchange members 312 in the corresponding row of battery modules 31.

As shown in Figures 15-17, each of the heat exchange tube assemblies further includes branch pipes at both ends and for respectively connecting the main inlet pipe 33 and the total outlet pipe 34, one of which is connected to the main inlet pipe 33, and A branch pipe is connected to the total outlet pipe 34, and branch pipes of each heat exchange pipe assembly are connected at the inlet or outlet of the heat exchange member 312 of the battery module 31 at the end of each row of the battery modules 31. The branch pipe is arranged to connect the main water inlet pipe 33 and each row of the battery modules 31, and to connect the main water outlet pipe 34 and each row of the battery modules 31.

Therefore, when the battery pack 1000 is in operation, the total inlet pipe 33 can supply the heat exchange liquid into the plurality of heat exchange tube assemblies, and the heat exchange liquid enters the plurality of heat exchange tube assemblies respectively, thereby flowing through each row of the battery modules. The heat exchange member 312 in the 31, and heat exchange with the battery core 311 in the heat exchange member 312, thereby improving the operating temperature of the battery core 311, extending the working life of the battery core 311, and thus between the battery modules 31 The temperature difference is small, the temperature distribution of the battery pack 1000 is uniform, and the work reliability is good.

There are various ways of connecting the total inlet pipe 33 and each of the heat exchange tube assemblies, and there are various ways of connecting the total outlet pipe 34 and each of the heat exchange tube assemblies, for example, the total inlet pipe 33 and each The heat exchange tube assemblies may be directly connected, and the total outlet pipe 34 may be directly connected to each of the heat exchange tube assemblies; for example, a water inlet connection pipe 35 is connected between the total inlet pipe 33 and each of the heat exchange tube assemblies, and the total is A water outlet connection pipe 36 is connected between the water pipe 34 and each of the heat exchange tube assemblies.

Optionally, each heat exchange member 312 is provided with an interface for communicating with the heat exchange tube 32 on the corresponding battery module 31, wherein the interface may be perpendicular to the upper surface of the battery module 31. The interface can be disposed on the upper surface of the battery module 31, so as to avoid affecting the arrangement of the plurality of battery modules 31 in the casing 1, and the heat exchange tube assembly can be sequentially replaced in a row of battery modules 31. The heat members 312 are connected. As shown in FIG. 2, each heat exchange member 312 has a liquid inlet interface 3121 and a liquid outlet interface 3122. The liquid inlet interface 3121 and the liquid outlet interface 3122 have the same structure, and the liquid inlet interface 3121 is used to connect the upstream heat exchange tubes 32. The liquid outlet port 3122 is for connecting the downstream heat exchange tubes 32. The heat exchange member 312 has a heat exchange liquid, and the heat exchange liquid can enter the heat exchange member 312 from the liquid inlet interface 3121, and the heat exchange liquid entering the heat exchange member 312 exchanges heat with the battery core 311 and then flows out from the liquid outlet interface 3122. The piece 312 implements heating or cooling of the battery cell 311.

Preferably, the heat exchange tube 32 may be a bellows having a certain degree of flexibility to effectively absorb mounting tolerances.

According to an optional embodiment of the present disclosure, the upper surface of the battery module 31 is provided with a limiting member that limits the degree of freedom of the heat exchange tube 32. The limiting member can effectively limit the heat exchange tubes 32 between the two battery modules 31, so that the position reliability of the heat exchange tubes 32 can be ensured, thereby ensuring the structural reliability of the battery pack 1000.

Specifically, the limiting member is a snap ring 38, and the heat exchange tube 32 is snapped into the snap ring 38. The snap ring 38 can effectively prevent the heat exchange tube 32 from randomly shaking, thereby ensuring the connection temperature of the heat exchange tube 32 and avoiding the occurrence of abnormal noise.

Optionally, as shown in FIG. 7-9, the heat exchange liquids in the plurality of heat exchange tube assemblies flow in the same direction, the total water inlet pipe 33 is located at one side of the plurality of battery modules 31, and the total water outlet pipe 34 is located at the plurality of batteries. The opposite side of the module 31. Thus, the total inlet pipe 33 and the total outlet pipe 34 are arranged reasonably, and the corresponding heat exchange tubes 32 can be respectively connected to the total inlet pipe 33 and the total outlet pipe 34, thereby reducing the manufacturing difficulty of the battery pack 1000 and reducing the battery pack 1000. Manufacturing costs.

Alternatively, as shown in FIG. 15, each row of battery modules 31 corresponds to two heat exchange tube assemblies, and the flow directions of the two heat exchange tube assemblies alternate. That is to say, each of the battery modules 31 can correspond to two heat exchange members 312, and the heat exchange liquids in the two heat exchange members 312 flow in opposite directions, so that the heat exchange effects between the two heat exchange members 312 and the battery core 311 can be made. Preferably, the temperature uniformity between the battery modules 31 can be improved.

Further, the opposite sides of the plurality of battery modules 31 are provided with a total inlet pipe 33 and a total outlet pipe 34. The branch pipe can be divided into an inlet connection pipe 35 and a discharge connection pipe 36. Specifically, the liquid inlet port 3121 of the heat exchange member 312 of the first battery module 31 of each row of the battery modules 31 is connected to the main water inlet pipe 33 through the water inlet connection pipe 35, and the last of each row of battery modules 31 The liquid outlet port 3122 of the heat exchange member 312 of one battery module 31 is connected to the total outlet pipe 34 through the water outlet connection pipe 36. The number of the water inlet connecting pipes 35 and the number of the water outlet connecting pipes 36 are the same as the number of the battery modules 31.

Optionally, both the inlet connection pipe 35 and the outlet connection pipe 36 may be bellows, and the bellows has a certain degree of flexibility, and can effectively absorb installation tolerances.

One end of the inlet connection pipe 35 and the inlet port 3121 of the heat exchange member 312 of the first battery module 31 of each row of the battery modules 31 are detachably connected through the adapter 37, and the other end of the inlet connection pipe 35 The main inlet pipe 33 is detachably connected through the adapter 37; one end of the outlet connection pipe 36 and the outlet port 3122 of the heat exchange member 312 of the last battery module 31 in each row of the battery modules 31 are passed through the adapter 37. The other end of the outlet connection pipe 36 is detachably connected to the total outlet pipe 34 through the adapter 37. The circulation pipe of the heat exchange liquid adopts the above arrangement and connection manner, is convenient to install and disassemble, and has small occupied space, and the connection is stable and reliable.

As shown in FIGS. 8 and 9, the total inlet pipe 33 and the total outlet pipe 34 are provided on the bottom plate of the casing 11, and the inlet port 3121 and the outlet port 3122 are provided at the top of the battery module 31, so the inlet pipe is connected. 35 and the outlet connection pipe 36 are L-shaped pipes, so that the inlet connection pipe 35 and the outlet connection pipe 36 can respectively fit the side surface and the upper surface of the battery module 31.

Also, the snap ring 38 can also be used to secure the inlet connection conduit 35 and the outlet connection conduit 36. In one embodiment of the present disclosure, the water inlet connecting pipe 35 may be fixed by a snap ring 38 disposed on the edge of the first battery module 31 in each row of the battery modules 31, and the water outlet connecting pipe 36 It can be fixed by a snap ring 38 which is disposed on the edge of the last battery module 31 in each row of the battery modules 31, whereby the water inlet connecting pipe 35 and the water outlet connecting pipe 36 are not arbitrarily shaken and connected. Stable and avoid abnormal noise.

Optionally, at least one length of the main inlet pipe 33 and the total outlet pipe 34 is rectangular. The rectangular pipe section can facilitate the connection of the branch pipe, and this can facilitate the arrangement of the total inlet pipe 33 and the total outlet pipe 34 in the casing 1.

Further, each of the heat exchange tubes 32 is provided with a joint at both ends thereof. The adapter can be used for connection with the corresponding heat exchange tube 32. The arrangement of the adapter can ensure the reliability of the connection between the heat exchange tube 32 and the heat exchange member 312 on the one hand, and can reduce the heat exchange tube on the other hand. Difficulty in connection between 32 and heat exchange member 312.

As shown in FIG. 3-5 and FIG. 13-14, each battery module 31 includes a battery core group, and the heat exchange member 312 is a heat exchange plate, and the heat exchange plate is disposed at one side of the battery core group. For example, as shown in Figures 3 and 5, the heat exchange plate can be sandwiched between two groups of cells, such that one heat exchange plate can simultaneously exchange heat with two sets of cells; for example, Figure 13 and Figure As shown in Fig. 14, the two battery groups can be close to each other, and then the two heat exchange plates can be attached to the side where the two battery groups are apart from each other.

Each of the battery cells includes at least one row of cells 311, and each row of cells 311 includes at least one battery cell 311. It can be understood that when each row of cell groups includes a plurality of rows of cells 311, the plurality of rows of cells 311 are sequentially arranged from top to bottom.

The arrangement position and structure of the heat exchange member 312 can be applied to the structure in which the battery core 311 is stacked upward, and the space in the height direction can be effectively utilized to increase the capacitance of the battery module 31 while ensuring each battery core 311. Both are in direct contact with the heat exchange plate, and the contact area is large, and the heat conduction efficiency is high, so that the heat exchange effect is good.

It can be understood that the middle portion of the battery module 31 (for example, between two rows of battery groups) has poor heat dissipation conditions and severe temperature rise, and the heat exchange plate is sandwiched between two rows of battery groups. The temperature of the most severe area of the battery module 31 can be effectively reduced.

In one embodiment of the present disclosure, the heat exchange member 312 is vertically installed inside the battery module 31, and has a simple structure and convenient installation.

In a specific embodiment, a heat conducting pad 313 is interposed between the heat exchange plate and each row of battery cells, and the battery core 311 is in contact with the heat exchange plate through the thermal pad 313 to absorb mounting tolerances and increase contact. The area further enhances the heat transfer effect.

In the embodiment shown in FIG. 4 and FIG. 5, there are two thermal pads 313, and two thermal pads 313 are respectively disposed on both sides of the heat exchange plate.

A battery thermal management system 10000 according to an embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 to 10, a battery thermal management system 10000 according to an embodiment of the present disclosure includes the battery pack 1000 of the above embodiment, a heat exchange circulation duct, a refrigeration system 4, a warm air system 5, and a first PTC heater 6.

The battery pack 1000 can be installed on an electric vehicle to provide power output for the electric vehicle and an energy storage device for powering other electric equipment on the vehicle, and can be repeatedly charged. A plurality of battery modules 31 may be provided in the battery pack 1000.

The battery pack 1000 has a total water inlet 21 formed on the total water inlet pipe 33 and a total water outlet port 22 formed on the total water outlet pipe 34. Both ends of the heat exchange circulation pipe are connected to the total water inlet 21 and the total water outlet 22, that is, the heat exchange circulation pipe is connected between the total water inlet 21 and the total water outlet 22.

The heat exchange liquid flows from the total water inlet 21 into the heat exchange cycle of the battery pack 1000 and the battery pack 1000, and then flows out from the total water outlet 22 to the heat exchange circulation pipe, so that the heat exchange liquid exchanges heat with the battery pack 1000.

The refrigeration system 4 and the warm air system 5, the refrigeration system 4 includes a compressor 42, a condenser 43, and a heat exchanger 41, and the refrigerant circulates in the compressor 42, the condenser 43, and the heat exchanger 41, and a state change occurs with the outside. Exchange heat to achieve cooling in the cab. In an embodiment of the present disclosure, refrigeration system 4 provides cooling power to thermal management system 10000.

The heat exchanger 41 includes a first heat exchange passage 411 and a second heat exchange passage 412 which exchange heat with each other, the first heat exchange passage 411 is connected in series between the compressor 42 and the condenser 43, and the second heat exchange passage 412 is heat exchange. A part of the circulation duct, that is, the refrigerant flowing in the first heat exchange passage 411 is a refrigerant, and the second heat exchange passage 412 is connected in series between the total water inlet 21 of the battery pack 1000 and the total water outlet 22, and flows in the second heat exchange passage 412. It is a heat exchange liquid.

In one embodiment of the present disclosure, the heat exchanger 41 is a plate heat exchanger 41, which is simple in structure and low in cost.

The heating system 5 is used to heat the air to achieve heating in the cab.

The warm air system 5 includes a warm air duct 51, and the warm air duct 51 is selectively connectable with the heat exchange circulation duct, that is, when the warm air system 5 needs to be turned on, the heat exchange liquid in the heat exchange circulation duct can flow into the warm air. The air passage 51, whereby the heat flow liquid flows in the warm air duct 51, and when the heat exchange liquid is heated, the warm air passage 51 exchanges heat with the air flowing through the air to realize heating in the cab; When the heating system is 5, the heat exchange liquid in the heat exchange circulation pipe may not flow into the warm air passage 51, and the flow path of the heat exchange liquid can be reasonably selected according to the demand, thereby reducing heat loss.

The first PTC heater 6 provides heating power to the battery pack 1000 of the thermal management system 10000. The first PTC heater 6 is configured to selectively heat the heat exchange liquid in the heat exchange circulation channel, and when the heat exchange liquid needs to be heated, the first PTC heater 6 is energized, and when the heat exchange liquid is not required to be heated, The first PTC heater 6 is powered off.

The heat exchange circulation pipeline can be provided with a water pump 2006 and a water tank 2007. The water pump 2006 mainly provides power for the circulation system of the heat exchange liquid, and the water tank 2007 is mainly used for adding a heat exchange liquid to the circulation system of the heat exchange liquid, and storing the heat exchange liquid.

In a specific embodiment of the present disclosure, the inlet and outlet of the water tank 2007, the inlet of the water pump 2006, and the outlet of the second heat exchange passage 412 may be in communication through the first three-way valve 91.

Alternatively, the water tank 2007 may be a secondary water tank of the electric vehicle 100000, so that the thermal management system 10000 can utilize the existing components of the electric vehicle 100000, saving cost and layout space.

When the temperature of the battery pack 1000 is too low, the thermal management system 10000 is activated, the first PTC heater 6 is energized, and the first PTC heater 6 utilizes the thermistor characteristic, the resistance rapidly increases with temperature, and the resistance heats up after energization.

At this time, if the heating system 5 is not turned on in the cab, as shown in FIG. 1 and FIG. 10, the heat exchange liquid sequentially flows through the second heat exchange passage 412, the water pump 2006, the first PTC heater 6, the battery pack 1000, and the first The heat exchange channel 412, and the heat exchange liquid can exchange heat with the refrigerant in the first heat exchange passage 411 at the second heat exchange passage 412, so that the first PTC heater 6 heats the heat exchange liquid, and the battery pack can be realized. 1000 heating. When the temperature of the battery pack 1000 exceeds a predetermined value, the heating power of the first PTC heater 6 is gradually decreased to maintain the battery pack 1000 at a suitable temperature.

At this time, if the heating system 5 is turned on in the cab, as shown in FIG. 1 and FIG. 10, the heat exchange liquid sequentially flows through the water pump 2006, the first PTC heater 6, and the battery pack 1000, and a part of the heat exchange liquid enters the second heat exchange passage 412. And the heat exchange liquid can exchange heat with the refrigerant in the first heat exchange passage 411 at the second heat exchange passage 412, so that the first PTC heater 6 heats the heat exchange liquid to realize heating of the battery pack 1000, and the other portion The warm air passage 51 is entered, and the air is blown through the warm air passage 51 in the warm air passage 51 to heat the cab.

Of course, in order to improve the comfort of the user, the heat demand of the warm air passage 51 can be preferentially satisfied. When the temperature in the cab reaches a predetermined temperature, it is only necessary to maintain the temperature in the cab to maintain balance.

It can be understood that maintaining the temperature in the cab maintains balance, that is, when the temperature of the battery pack 1000 is higher than the temperature of the heat exchange liquid after the temperature of the battery pack 1000 rises, the heat of the battery pack 1000 can be used to heat up. The heat exchange liquid can thereby reduce the heating power of the first PTC heater 6, maintain the temperature of the supply cab, and achieve the purpose of rational utilization of energy.

According to the battery pack 1000 thermal management system 10000 of the embodiment of the present disclosure, the heat exchange liquid can be heated by the first PTC heater 6 to achieve heating of the battery pack 1000 and heating of the cab.

When the temperature of the battery pack 1000 is too high, the thermal management system 10000 is started, the compressor 42 of the refrigeration system 4 is started, the refrigerant is compressed, and after being cooled by the condenser 43, the refrigerant is expanded by the expansion valve and then enters the first heat exchange passage 411. The refrigerant in the refrigeration system 4 exchanges heat with the heat exchange liquid of the second heat exchange passage 412. After the heat exchange liquid is cooled, it is circulated between the heat exchange circulation pipeline and the battery pack 1000 under the driving of the water pump 2006. And heat exchange with the battery pack 1000 to lower the temperature of the battery pack 1000.

When the cab needs to be turned on to cool down the cab, the refrigeration system 4 satisfies the cooling requirements of the battery pack 1000 and meets the cooling requirements in the cab.

When the battery pack 1000 does not need to be cooled or heated, if the temperature difference between the battery modules 31 exceeds the set value, the water pump 2006 may be separately activated to perform the heat exchange liquid circulation inside the battery pack 1000, thereby reducing the battery. The temperature difference between the modules 31.

According to the thermal management system 10000 of the embodiment of the present disclosure, the cooling of the heat exchange liquid is achieved by heat exchange between the refrigerant of the refrigeration system 4 of the electric vehicle 1000 and the heat exchange liquid to achieve cooling of the battery pack 1000 through the first PTC heater 6 The heating of the heat exchange liquid is realized to realize the function of heating the battery pack 1000 and the cab, and in different external environments, the battery pack 1000 is still at a suitable temperature, thereby ensuring the temperature uniformity and temperature stability of the battery pack 1000, The heat management efficiency is higher, and the heat exchange between the heat exchange liquid and the battery pack 1000 is performed, so that the heat of the battery pack 1000 is uniform, the temperature difference between the plurality of battery modules 31 in the battery pack 1000 is small, and the space of the heat exchange circulation pipeline is small. The cost is low, and there is no need to increase too much peripheral equipment to drive the heat exchange liquid to circulate between the heat exchange circulation pipe and the battery pack 1000, thereby saving the power consumption of the electric vehicle.

In addition, according to the thermal management system 10000 of the embodiment of the present disclosure, combining the air conditioning system of the electric vehicle 100000 with the heating and cooling of the battery pack 1000 can preferentially ensure the use requirement of the air conditioning system. When the temperature of the battery pack 1000 reaches a predetermined value, The energy of the battery pack 1000 can supplement the heating power of the first PTC heater 6 to achieve the purpose and effect of fully utilizing the energy of the entire vehicle.

Some specific embodiments of the battery thermal management system 10000 in accordance with the present disclosure are described in detail below with reference to FIGS. 1 and 10.

As shown in FIGS. 1 and 10, a battery thermal management system 10000 according to an embodiment of the present disclosure includes a battery pack 1000, a heat exchange circulation duct, an air conditioner system including an electric vehicle 100000 of a refrigeration system 4 and a heater system 5, and a first PTC. The heater 6, the first control valve 7, and the second control valve 8.

The battery pack 1000 has a total water inlet 21 and a total water outlet 22, and both ends of the heat exchange circulation pipe are connected to the total water inlet 21 and the total water outlet 22, respectively. The refrigeration system 4 includes a compressor 42, a condenser 43, and a heat exchanger 41. The heat exchanger 41 includes a first heat exchange passage 411 and a second heat exchange passage 412 which exchange heat with each other, the first heat exchange passage 411 is connected in series between the compressor 42 and the condenser 43, and the second heat exchange passage 412 is heat exchange. A part of the circulation pipe. The first PTC heater 6 is for selectively heating the heat exchange liquid in the heat exchange circulation passage.

The warm air system 5 includes a warm air duct 51. The warm air duct 51 and the heat exchange circulation duct are selectively communicated through the first control valve 7, whereby the control is simple and the switching of the operation mode of the thermal management system 10000 is facilitated.

Specifically, the first control valve 7 can adjust the flow rate of the heat exchange liquid flowing from the heat exchange circulation passage into the total water inlet 21, and the first control valve 7 can adjust the heat exchange liquid flowing from the heat exchange circulation passage into the warm air passage 51. flow. That is, the first control valve 7 is a flow regulating valve.

More specifically, as shown in FIGS. 1 and 10, the first control valve 7 includes a first valve port A1, a second port A2, and a third port A3, and the first port A1 of the first control valve 7 The outlet of a PTC heater 6 is in communication, the second port A2 of the first control valve 7 is in communication with the warm air duct 51, and the third port A3 of the first control valve 7 is in communication with the total water inlet 21.

The first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 and the flow rate is adjustable. For example, the opening size of the communication between the first valve port A1 and the second valve port A2 can be adjusted.

The first valve port A1 of the first control valve 7 communicates with the third valve port A3 of the first control valve 7 and the flow rate is adjustable. For example, the opening size of the communication between the first valve port A1 and the third valve port A2 can be adjusted.

That is to say, if the heating system 5 is turned on in the cab, the heat exchange liquid in the heat exchange circulation passage, after being heated by the first PTC heater 6, can all flow into the warm air duct 51 through the warm air duct 51 and then into the total water inlet. 21, it is also possible to directly flow into the total water inlet 21, and it is also possible to partially flow into the warm air duct 51 and the other part into the total water inlet 21.

The total water outlet 22 is selectively connectable to one of the inlet of the first PTC heater 6 and the total water inlet 21 through the second control valve 8, that is, when the second control valve 8 communicates with the total water outlet 22 and the first At the inlet of the PTC heater 6, the heat exchange liquid may be heated by the first PTC heater 6 and then flow into the total water inlet 21, and when the second control valve 8 communicates with the total water outlet 22 and the total water inlet 21, the heat exchange liquid may not After being heated by the first PTC heater 6, it flows directly into the total water inlet 21.

More specifically, as shown in FIGS. 1 and 10, the second control valve 8 includes a first valve port B1, a second valve port B2, and a third valve port B3, and the first valve port B1 of the second control valve 8 and the total The water outlet 22 is in communication, the second valve port B2 of the second control valve 8 is in communication with the total water inlet 21, and the third valve port B3 of the second control valve 8 is in communication with the inlet of the first PTC heater 6.

The first port B1 of the second control valve 8 is selectively communicable with the second port B2 of the second control valve 8 or the third port B3 of the second control valve 8. The second control valve 8 can be an on-off valve.

Alternatively, the first PTC heater 6 may be disposed on the outer peripheral surface of the heat exchange circulation passage to indirectly heat the heat exchange liquid, whereby the heat exchange efficiency is high and the sealing performance of the heat exchange circulation passage is good.

Alternatively, the first PTC heater 6 may be disposed in the heat exchange circulation passage to directly heat the heat exchange liquid, whereby the heat exchange efficiency is higher.

It can be understood that the first PTC heater 6 does not have a passage for the heat exchange liquid to flow by itself, but the first PTC heater 6 may be disposed on the outer peripheral surface of the heat exchange circulation passage to indirectly heat the heat exchange liquid, or A PTC heater 6 may be disposed in the heat exchange circulation passage to directly heat the heat exchange liquid, where "the first valve port A1 of the first control valve 7 communicates with the outlet of the first PTC heater 6, and the second control valve 8 The third valve port B3 is in communication with the inlet of the first PTC heater 6" means that the outlet of the portion of the heat exchange circulation passage where the first PTC heater 6 is provided is in communication with the first valve port A1 of the first control valve 7. The inlet of the portion of the heat exchange circulation passage where the first PTC heater 6 is provided communicates with the third valve port B3 of the second control valve 8.

When the first PTC heater 6 can be disposed in the heat exchange circulation passage to directly heat the heat exchange liquid, the heat exchange liquid is an insulating medium.

In the embodiment shown in FIGS. 1 and 10, the second valve port B2 of the second control valve 8, the third valve port A3 of the first control valve 7, and the total water inlet 21 may be connected through the second three-way valve 92. The outlet of the warm air passage 51, the second valve port B2 of the second control valve 8, and the total water inlet 21 may be communicated through the third three-way valve 93. Thereby, the connection is convenient, and the arrangement of the heat exchange channel is easy.

In a specific embodiment, as shown in FIG. 10, in some embodiments of the present disclosure, the refrigeration system 4 may further include a third heat exchange passage 44 connected in series to the compressor 42 and the condenser. Between 43, the third heat exchange passage 44 and the warm air duct 51 exchange heat with each other. Thus, when the refrigeration system 4 is turned on, the refrigerant in the third heat exchange passage 44 exchanges heat with the heat exchange liquid in the warm air duct 51, whereby the refrigerant is at the third heat exchange passage 44 and the first heat exchange passage. At 411, heat exchange can be performed with the heat exchange liquid, the cooling rate of the heat exchange liquid is fast, and the cooling efficiency of the battery pack 1000 is higher.

In some embodiments, the warm air system 5 may further include a second PTC heater that selectively heats the heat exchange liquid in the warm air passage 51, that is, the warm air system 5 is separately provided with one The second PTC heater heats the heat exchange liquid in the warm air passage 51. The heating system 5 has high heating efficiency, and the temperature in the cab is rapidly increased, and the heating power of the first PTC heater can be reduced.

The first to fifth modes of operation of the battery thermal management system 10000 in accordance with an embodiment of the present disclosure are described in detail below with reference to FIGS. 1 and 10.

1), the first mode of operation: in this mode, the first PTC heater 6 only heats the battery pack 1000

Specifically, when the temperature of the battery pack 1000 is too low, the first PTC heater 6 is energized, the refrigeration system 4 is not operating, the warm air system 5 is not operating, the water pump 2006 is activated, and the first valve port B1 of the second control valve 8 is The third valve port B3 of the second control valve 8 is in communication, the first valve port B1 of the second control valve 8 is disconnected from the second valve port B2 of the second control valve 8, and the first valve port A1 of the first control valve 7 is In communication with the third port A3 of the first control valve 7, the first port A1 of the first control valve 7 is disconnected from the second port A2 of the first control valve 7.

The flow path of the heat exchange liquid is: the total water outlet 22, the second heat exchange passage 412, the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, and the first PTC The heater 6, the first valve port A1 of the first control valve 7, the third valve port A3 of the first control valve 7, the total water inlet port 21, and the battery pack 1000 are heat exchanged, and then flow out from the total water outlet 22, and reciprocately cycle. To achieve heating of the battery pack 1000.

2), the second working mode: in this mode, the first PTC heater 6 simultaneously heats the battery pack 1000 and the heating system 5

Specifically, when the temperature of the battery pack 1000 is too low, the first PTC heater 6 is energized, the refrigeration system 4 is not operating, the warm air system 5 is operated, the water pump 2006 is activated, and the first valve port B1 of the second control valve 8 is The third valve port B3 of the second control valve 8 is in communication, the first valve port B1 of the second control valve 8 is disconnected from the second valve port B2 of the second control valve 8, and the first valve port A1 of the first control valve 7 is The third valve port A3 of the first control valve 7 is connected and the flow rate is adjustable. The first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 and the flow rate is adjustable.

The flow path of the heat exchange liquid is: sequentially flowing through the total water outlet 22, the second heat exchange passage 412, the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, After the first PTC heater 6, it is divided into two paths from the outlet of the first PTC heater 6, one via the first valve port A1 of the first control valve 7, the third valve port A3 of the first control valve 7, and the total advance After the water port 21 is in heat exchange with the battery pack 1000, it flows out from the total water outlet 22, reciprocates to realize heating of the battery pack 1000, and the other path passes through the first valve port A1 of the first control valve 7 and the first control valve 7. The second valve port A2 and the warm air passage 51 are in the air heat exchange in the warm air passage 51 to realize heating of the cab, and enter the battery pack 1000 via the total water inlet 21, and flow out from the total water outlet 22 to reciprocate.

The liquid heated by the first PTC heater 6 passes through the first control valve 7, by controlling the flow rate at which the first valve port A1 of the first control valve 7 communicates with the third port A3 of the first control valve 7, and is controlled The flow rate at which the first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 distributes the flow rate of the heat exchange liquid flowing into the warm air passage 5 and directly entering the total water inlet 21, that is, The heat for the heating system 5 and the heat for heating the battery pack 1000 are distributed.

Initially, the flow rate of the heat exchange liquid passing through the third port A3 of the first control valve 7 is smaller than the flow rate of the heat exchange liquid passing through the second port A2 of the first control valve 7, and is preferentially distributed to the heater system at a predetermined ratio. 5 more heat, priority to meet the heating requirements in the cab.

When the temperature in the cab is raised, it is only necessary to ensure that the temperature balance of the cab can be maintained. At this time, the flow rate of the heat exchange liquid passing through the third port A3 of the first control valve 7 is greater than that passing through the first control valve 7. The flow rate of the heat exchange liquid of the second port A2.

After the operating temperature of the battery pack 1000 rises, when the temperature of the battery pack 1000 is higher than the temperature of the heat exchange liquid, at this time, the first valve port A1 of the first control valve 7 and the third valve of the first control valve 7 The valve port A3 is disconnected, the first valve port A1 of the first control valve 7 is in communication with the second valve port A2 of the first control valve 7, and the flow rate is the largest at the communication, so that the heat of the battery pack 1000 can be used to heat the heat exchange liquid. A PTC heater 6 can reduce the heating power, maintain the temperature of the supply cab, and achieve the purpose of rational utilization of the vehicle energy.

3), the third working mode: in this mode, the cooling system 4 only cools the battery pack 1000

When the temperature of the battery pack 1000 is too high, the first PTC heater 6 is powered off, the refrigeration system 4 is operated, the warm air system 5 is not working, the water pump 2006 is started, and the first valve port B1 and the second control of the second control valve 8 are The third port B3 of the valve 8 is opened, and the first port B1 of the second control valve 8 is in communication with the second port B2 of the second control valve 8.

In the embodiment shown in FIG. 1 , the heat exchange liquid flows through the total water outlet 22 and the second heat exchange passage 412 in sequence, and the heat exchange liquid is at the second heat exchange passage 412 and the refrigerant in the first heat exchange passage 411 . Heat exchange, the cooled heat exchange liquid enters the battery pack 1000 via the water pump 2006, the first valve port B1 of the second control valve 8, the second valve port B2 of the second control valve 8, and the total water inlet 21, and the battery pack After 1000 heat exchange, it flows out from the total water outlet 22 and reciprocates to achieve cooling of the battery pack 1000.

In the embodiment shown in FIG. 10, the refrigeration system 4 may further include a third heat exchange passage 44. When the temperature of the battery pack 1000 is too high, the first PTC heater 6 is powered off, the refrigeration system 4 operates, and the warm air The system 5 does not work, the water pump 2006 starts, the first valve port B1 of the second control valve 8 communicates with the third valve port B3 of the second control valve 8, and the first valve port B1 and the second control valve of the second control valve 8 The second valve port B2 of 8 is opened, the first valve port A1 of the first control valve 7 is disconnected from the third valve port A3 of the first control valve 7, and the first valve port A1 of the first control valve 7 is first The second valve port A2 of the control valve 7 is in communication.

In this embodiment, the heat exchange liquid flows through the total water outlet 22, the second heat exchange passage 412, and the heat exchange liquid at the second heat exchange passage 412 to exchange heat with the refrigerant in the first heat exchange passage 411. The cooled heat exchange liquid passes through the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, the first valve port A1 of the first control valve 7, and the first control valve The second valve port A2 of 7 enters the warm air passage 51, and the heat exchange liquid exchanges heat in the third heat exchange passage 44 in the warm air passage, and the cooled heat exchange liquid enters the battery pack 1000 via the total water inlet 21, After heat exchange with the battery pack 1000, it flows out from the total water outlet 22 and reciprocates to cool the battery pack 1000.

In short, the cooling of the battery pack 1000 can select a suitable flow path of the heat exchange liquid according to the actual cooling needs, and the heat management system 1000 has a wider application range.

4), the fourth working mode: in this mode, the refrigeration system 4 cools the battery pack 1000 and cools the cab

In this mode, the refrigeration system 4 simultaneously cools the battery pack 1000 and the cooling cab, and the flow path of the heat exchange liquid when the refrigeration system 1000 cools the battery pack 1000 is the same as the flow path of the heat exchange liquid when the refrigeration system 4 cools only the battery pack 1000.

5), the fifth working mode: the internal circulation of the battery pack 1000 in this mode

When the battery pack 1000 does not need to be cooled and does not need to be heated, if the temperature difference between the battery modules 31 exceeds the set value, the water pump 2006 may be separately activated to perform the heat exchange liquid circulation inside the battery pack 1000. Thereby, the temperature difference between the battery modules 31 is reduced.

At this time, the first PTC heater 6 is powered off, the refrigeration system 4 is not working, the warm air system 5 is not working, the water pump 2006 is activated, the first valve port B1 of the second control valve 8 and the third valve of the second control valve 8 are activated. The port B3 is opened, and the first port B1 of the second control valve 8 is in communication with the second port B2 of the second control valve 8.

The flow paths of the heat exchange liquid are: total water outlet 22, second heat exchange passage 412, water pump 2006, first valve port B1 of second control valve 8, second valve port B2 of second control valve 8, and total water inlet 21. After heat exchange with each of the battery modules 31 of the battery pack 1000, the battery is discharged from the total water outlet 22 and reciprocated to balance the temperature difference between the battery coatings 31 to make the temperature of the battery pack 1000 more uniform.

In short, according to the battery thermal management system 10000 of the embodiment of the present disclosure, the battery pack 1000 is temperature-controlled according to different external environments, so that the battery pack 1000 is always at a suitable temperature, and the energy of the refrigeration system 4 is utilized as a battery pack. 1000 refrigeration, using the first PTC heater of the battery pack 1000 for heating the heating system 5, the structure is simple and the vehicle energy distribution is reasonable.

An electric vehicle 100000 according to the present disclosure will be briefly described below with reference to FIGS. 1 and 10, and as shown in FIGS. 1 and 10, an electric vehicle 100000 according to an embodiment of the present disclosure includes the above-described battery thermal management system 10000 and battery manager 3000.

The battery manager 3000 is used to collect information of the battery pack 1000, such as voltage information, current information, and temperature information, to monitor the battery pack 1000.

The battery manager 3000 is connected to both the refrigeration system 4 of the battery thermal management system 10000 and the first PTC heater 6 to manage the battery pack 1000. Alternatively, the battery manager 3000 can perform CAN communication with the refrigeration system 4 and the first PTC heater 6, and the battery manager 3000 can also control the on and off of the high voltage contactor.

In the case that the electric vehicle 100000 is working normally, the battery manager 3000 collects information about the battery pack 1000, including information such as temperature, voltage, current, and the like of the battery pack 1000, and monitors the battery pack 1000.

When the average temperature T of the battery pack 1000 detected by the battery manager 3000 reaches the high temperature alarm temperature value, the cooling system 4 starts operating, and the thermal management system 1000 enters the third operating mode or the fourth operating mode.

When the battery manager 3000 detects that the average temperature T of the battery pack 1000 reaches the low temperature alarm temperature value, the first PTC heater 6 is energized, and the thermal management system 1000 enters the first mode of operation or the second mode of operation.

According to the electric vehicle 10000 of the embodiment of the present disclosure, the temperature of the battery pack 1000 is monitored by the battery manager 3000, the opening and closing of the refrigeration system 4 and the first PTC heater 6 are controlled in real time, and the refrigeration system 4 and the first PTC heater are adjusted. The power of 6 realizes the thermal management of the battery pack 1000, so that the battery pack 1000 is always at a suitable temperature. The electric vehicle 10000 according to the embodiment of the present disclosure has a simple structure and is adapted to different environments and climates, and the heat management effect of the battery pack 1000 is good.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present disclosure and the simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the disclosure.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present disclosure, the meaning of "a plurality" is two or more unless specifically and specifically defined.

In the present disclosure, the terms "installation", "connected", "connected", "fixed", and the like, are to be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated or defined otherwise. , or integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements. The specific meanings of the above terms in the present disclosure can be understood by those skilled in the art on a case-by-case basis.

In the present disclosure, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material, or feature is included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms does not have to be directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification and features of various embodiments or examples may be combined and combined without departing from the scope of the invention.

While the embodiments of the present disclosure have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the disclosure The embodiments are subject to variations, modifications, substitutions and variations.

Claims (20)

1. A battery pack, comprising:

   Box

   a plurality of battery modules, the plurality of battery modules are disposed in the box, the plurality of battery modules are divided into a plurality of rows of battery modules, and each of the battery modules is provided with a heat exchange member;

   a plurality of heat exchange tube assemblies, each of the battery modules corresponding to at least one of the heat exchange tube assemblies, each of the heat exchange tube assemblies comprising a plurality of independent heat exchange tubes and two branch tubes, each of which Any one of the heat exchange tubes of the heat exchange tube assembly is connected between heat exchange members of two adjacent battery modules in a row of battery modules, and the branches of each of the heat exchange tube assemblies a tube is connected at an inlet or an outlet of the heat exchange member of the battery module at the end of each row of battery modules;

   A total inlet pipe and a total outlet pipe, the total inlet pipe and the total outlet pipe are respectively connected to two branch pipes of each of the heat exchange tube assemblies.
2. The battery pack according to claim 1, wherein each of said heat exchange members is provided with an interface for communicating with said heat exchange tubes on said corresponding battery module.
3. The battery pack according to any one of claims 1 to 2, wherein the heat exchange tube is a bellows.
4. The battery pack according to any one of claims 1 to 3, wherein the upper surface of the battery module is provided with a stopper for restricting the degree of freedom of the heat exchange tube.
5. The battery pack according to claim 4, wherein the limiting member is a snap ring, and the heat exchange tube is snapped into the snap ring.
6. The battery pack according to any one of claims 1 to 5, wherein the heat exchange liquids in the plurality of heat exchange tube assemblies flow in the same direction, and the total water inlet pipe is located in the plurality of battery modules On one side, the total outlet pipe is located on the opposite side of the plurality of battery modules.
7. The battery pack according to any one of claims 1 to 6, wherein each of the battery modules corresponds to two heat exchange tube assemblies, and the flow directions of the two heat exchange tube assemblies alternate.
8. The battery pack according to any one of claims 1 to 7, wherein the plurality of battery modules are provided with the total inlet pipe and the total outlet pipe on opposite sides.
9. The battery pack according to any one of claims 1 to 8, wherein the branch pipe is L-shaped to fit a side surface and an upper surface of the battery module.
10. The battery pack according to any one of claims 1 to 9, wherein at least one section of the total inlet pipe and the total outlet pipe is rectangular.
11. The battery pack according to any one of claims 1 to 10, characterized in that each of the heat exchange tubes is provided with a joint at both ends thereof.
12. The battery pack according to any one of claims 1 to 11, wherein each of the battery modules includes a battery pack, and the heat exchange member is a heat exchange plate, and the heat exchange plate is disposed at One side of the battery pack.
13. The battery pack according to claim 12, wherein a heat conductive pad is interposed between the heat exchange plate and the battery core group.
14. A battery thermal management system, comprising:

    A battery pack according to any one of claims 1 to 13;

    a heat exchange circulation pipe, the two ends of the heat exchange circulation pipe are respectively connected to the total inlet pipe and the total outlet pipe;

    a refrigeration system and a warm air system, the refrigeration system including a compressor, a condenser, and a heat exchanger, the heat exchanger including a first heat exchange channel and a second heat exchange channel that exchange heat with each other, the first heat exchange a passage is connected in series between the compressor and the condenser, the second heat exchange passage is a part of the heat exchange circulation duct, the warm air system is for heating air, and the warm air system includes a warm air a conduit, the warm air duct and the heat exchange circulation passage are selectively connectable;

    A first PTC heater for selectively heating the heat exchange liquid in the heat exchange circulation passage.
15. The battery thermal management system according to claim 14, wherein said refrigeration system further comprises a third heat exchange passage, said third heat exchange passage being connected in series between said compressor and said condenser The third heat exchange passage and the warm air duct exchange heat with each other.
16. A battery thermal management system according to claim 14 or claim 15, further comprising a first control valve, said warm air duct and said heat exchange circulation passage being selectively connectable by said first control valve.
17. The battery thermal management system according to claim 16, wherein said first control valve comprises a first valve port, a second valve port and a third valve port, and said first valve port of said first control valve is The outlet of the first PTC heater is in communication, the second valve port of the first control valve is in communication with the warm air duct, and the third valve port of the first control valve is in communication with the total inlet pipe. The first valve port of the first control valve is in communication with the second valve port of the first control valve, and the flow rate is adjustable, the first valve port of the first control valve and the third valve of the first control valve The port is connected and the flow is adjustable.
18. A battery thermal management system according to any one of claims 14-17, further comprising a second control valve, said total outlet pipe selectively communicating said first through said second control valve One of the inlet of the PTC heater and the total inlet pipe.
19. The battery thermal management system according to claim 18, wherein said second control valve comprises a first valve port, a second valve port and a third valve port, and said first valve port of said second control valve is The second outlet of the second control valve is in communication with the total inlet pipe, and the third valve port of the second control valve is in communication with the first PTC heater, The first valve port of the second control valve is selectively connectable to the second valve port of the second control valve or the third valve port of the second control valve.
20. A vehicle characterized by comprising the battery thermal management system according to any one of claims 14-20.

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