CN218351567U - A battery thermal management device with a composite phase change material plate coupled with liquid cooling - Google Patents

Abstract

The utility model relates to a battery thermal management device coupled with a composite phase-change material plate for liquid cooling, which belongs to the field of thermal management of a battery power system and includes a box body, a battery module, a first liquid-cooled plate, a composite phase-change material plate, a second Liquid cooling plate; the battery module includes a number of uniformly distributed single cells; a composite phase change material plate is arranged between every two adjacent single cells; both the first liquid cold plate and the second liquid cold plate are provided with The flow channel is filled with cooling liquid; each composite phase change material plate is embedded with a heat sink, and the outer edge of the heat sink is provided with a number of extensions, and the extensions are inserted into the flow channel. The composite phase-change material plate embedded with heat sink is closely attached to the two sides of each single battery, and the heat sink embedded in the composite phase-change material plate is inserted into the flow channel through the protruding part to fully contact the cooling liquid, so that it can Improve the heat dissipation effect of the battery and the temperature uniformity among the individual batteries.

Description

A battery thermal management device with a composite phase change material plate coupled with liquid cooling

technical field

The utility model relates to the thermal management field of a battery power system, in particular to a battery thermal management device with a composite phase-change material plate coupled with liquid cooling.

Background technique

As a new type of transportation in modern times, electric vehicles have gradually become the most commonly used means of transportation for people to travel. Electric vehicles provide driving force through batteries, do not consume traditional fossil energy, and have greater advantages than traditional vehicles in terms of environmental protection. The power batteries of existing electric vehicles are generally lithium batteries and are connected in series and parallel to form high-power, high-capacity battery modules. However, the existing power batteries generally have the problems of poor heat dissipation and poor temperature uniformity. These problems will prevent the large amount of heat generated by the battery from being dissipated in time, especially under high rate and harsh use conditions. The internal temperature will rise sharply, seriously affecting the performance of the battery and greatly shortening the life of the battery, and even causing safety accidents. Therefore, how to design a battery cooling device with good heat dissipation effect and good temperature uniformity is an urgent problem to be solved at present.

Utility model content

The purpose of the utility model is to provide a battery heat management device with a composite phase change material plate coupled with liquid cooling, which can effectively improve the heat dissipation effect of the battery and solve the problems of poor heat dissipation and poor temperature uniformity of the existing power battery.

In order to achieve the above object, the utility model provides the following scheme:

A battery thermal management device coupled with a composite phase-change material plate coupled with liquid cooling, the device includes a box body and a battery module set in the box body;

The first side and the second side of the battery module are respectively provided with a first liquid cold plate; the first side is opposite to the second side;

The third side and the fourth side of the battery module are respectively provided with a composite phase change material plate; the third side is opposite to the fourth side;

The fifth side of the battery module is provided with a second liquid cold plate; the fifth side is opposite to the electrode end face of the battery module;

The battery module includes several single cells uniformly distributed; a composite phase-change material plate is arranged between every two adjacent single cells;

Both the first liquid cold plate and the second liquid cold plate are provided with flow channels, and the flow channels are filled with cooling liquid;

Each of the composite phase-change material plates is embedded with a heat sink, and the outer edge of the heat sink is provided with a number of extensions, and a number of extensions are respectively inserted into the first liquid cooling plate and the In the channel of the second liquid cold plate.

Optionally, a water tank and a water pump are also arranged in the box, and the water tank is filled with the cooling liquid;

The liquid inlet of the water pump communicates with the liquid outlet of the water tank through a conduit, and the liquid outlet of the water pump communicates with the liquid inlets of the first liquid cooling plate and the second liquid cooling plate respectively through conduits , the liquid outlets of the first liquid cold plate and the second liquid cold plate communicate with the liquid inlets of the water tank respectively through conduits.

Optionally, the material of the composite phase change material plate is expanded graphite, paraffin or epoxy resin.

Optionally, the thickness of the composite phase change material plate is 5-6mm.

Optionally, the single battery is a rectangular parallelepiped battery.

Optionally, the heat sink has a thickness of 1-2mm.

Optionally, the material and thickness of the protruding part are the same as that of the heat sink, and the protruding length of the protruding part is 3-4mm.

Optionally, the width of the flow channel of the first liquid cold plate is 5-6mm, and the liquid inlet and the liquid outlet are on the same side.

Optionally, the width of the flow channel of the second liquid cold plate is 5-6mm, and the liquid inlet and the liquid outlet are not on the same side.

Optionally, the cooling liquid is water, fluorinated liquid or mineral oil.

According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:

The utility model proposes a battery thermal management device coupled with a composite phase-change material plate and liquid cooling. The device includes a box body and a battery module set in the box body; the first side and the second side of the battery module are respectively arranged There is a first liquid cold plate; the first side is opposite to the second side; the third side and the fourth side of the battery module are respectively provided with a composite phase change material plate; the third side is opposite to the fourth side; the second side of the battery module The fifth side is provided with a second liquid cold plate; the fifth side is opposite to the electrode end face of the battery module; the battery module includes a number of single cells evenly distributed; a composite phase change is set between every two adjacent single cells material plate; the first liquid cold plate and the second liquid cold plate are provided with flow channels filled with cooling liquid; each composite phase change material plate is embedded with heat sinks, and the outer edges of the heat sinks are provided with several The protruding parts, several protruding parts are correspondingly inserted into the flow channels of the first liquid cooling plate and the second liquid cooling plate. In the utility model, the composite phase-change material plate embedded with cooling fins is closely attached to the two sides of each single battery, and the good temperature uniformity and heat storage performance of the composite phase-change material plate can be used to make each unit in the battery module The temperature difference between the bulk batteries is basically consistent, improving the temperature uniformity of the battery. Moreover, the heat sink embedded in the composite phase change material plate is inserted into the flow channel of the first liquid cold plate and the second liquid cold plate through the protruding part, and is directly in full contact with the cooling liquid, thereby conducting the heat on the heat sink to the cooling plate. In the liquid, a large amount of heat is taken away from the heat sink, thereby achieving the purpose of cooling the heat sink and the battery, which can effectively improve the heat dissipation effect of the battery and solve the problems of poor heat dissipation and poor temperature uniformity of the existing power battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Figure 1 is a schematic diagram of the overall structure of a battery thermal management device coupled with a composite phase change material plate coupled with liquid cooling provided in Example 1 of the present invention;

Fig. 2 is a schematic structural diagram of the battery module provided by Embodiment 1 of the present invention;

Fig. 3 is a schematic structural view of the extension part provided by Embodiment 1 of the present utility model;

FIG. 4 is a schematic structural view of the heat sink provided by Embodiment 1 of the present invention;

Fig. 5 is a schematic structural diagram of the first liquid cooling plate provided by Embodiment 1 of the present invention;

Fig. 6 is a schematic structural diagram of the second liquid cooling plate provided by Embodiment 1 of the present invention.

Explanation of reference signs:

1-box, 2-first liquid cold plate, 3-composite phase change material plate, 4-second liquid cold plate, 5-single battery, 6-runner, 7-radiating fin, 8-extrusion , 9-water tank, 10-water pump, 11-pipe, 12-terminal.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The purpose of the utility model is to provide a battery heat management device with a composite phase change material plate coupled with liquid cooling, which can effectively improve the heat dissipation effect of the battery and solve the problems of poor heat dissipation and poor temperature uniformity of the existing power battery.

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Figure 1, this embodiment shows a battery thermal management device coupled with a composite phase change material plate and liquid cooling, the device includes a box body 1 and a battery module set in the box body 1, the The battery module includes a number of single cells 5 evenly distributed, and the single cells 5 are preferably rectangular parallelepiped batteries, specifically square hard shell or soft pack battery.

In this embodiment, the battery module includes a first side, a second side, a third side, a fourth side and a fifth side. Since the battery module is placed in different directions in the box body 1, the orientation of each side is also different. The following is an example according to Figure 1. As shown in Figure 1, the first side, the second side, the third side, the fourth side The sides are the four sides of the battery module, the fifth side is the bottom surface of the battery module, the top surface of the battery module is exposed, and the positive and negative terminals 12 of each single battery 5 are leaked, so as to facilitate the connection of multiple cells. The positive and negative poles of the bulk battery 5 are connected. Wherein, the two cylindrical shapes on each single battery 5 in FIG. 1 represent the terminal posts 12 of the positive pole and the negative pole respectively.

Wherein, the first side and the second side of the battery module are respectively provided with a first liquid cold plate 2; the first side is opposite to the second side; the third side and the fourth side of the battery module Composite phase-change material plates 3 are provided on the sides; the third side is opposite to the fourth side; the fifth side of the battery module is provided with a second liquid cooling plate 4; the fifth side is opposite to the fourth side. The electrode end faces of the battery module face each other, and the electrode end faces are the faces where the positive and negative terminals 12 of the battery module are located.

In this embodiment, a composite phase-change material plate 3 is arranged between every two adjacent single cells 5, and each single cell 5 and the composite phase-change material plates 3 on both sides are closely attached. , forming a "sandwich" structure. In this embodiment, the material of the composite phase change material plate 3 is preferably raw materials such as expanded graphite, paraffin or epoxy resin, the thickness of the composite phase change material plate 3 is set to 5-6 mm, and the size of the composite phase change material plate 3 is It is basically the same as the single battery 5, so as to reduce the system cost while ensuring the cooling effect.

In this embodiment, two opposite first liquid-cooled plates 2 and two opposite composite phase-change material plates 3 are respectively arranged on the first side, the second side, the third side, and the fourth side of the battery module, and are combined in The second liquid cold plate 4 arranged on the fifth side forms a battery that can be accommodated by two opposite composite phase change material plates 3, two opposite first liquid cold plates 2 and one second liquid cold plate 4 The battery compartment of the module, as shown in Figure 2, separates each single battery 5 through a plurality of composite phase change material plates 3 evenly arranged in the battery compartment, and utilizes the phase change material of the composite phase change material plate 3 itself It has good temperature uniformity and heat storage performance, which can maintain the temperature difference between each single battery 5 in the battery module to a certain extent, so that the temperature of each single battery 5 is more balanced and consistent.

In this embodiment, both the first liquid cooling plate 2 and the second liquid cooling plate 4 are provided with flow channels 6 , and the flow channels 6 are filled with cooling liquid.

As shown in FIG. 3 , a cooling fin 7 is embedded in each of the composite phase change material plates 3 , the structure of the cooling fin 7 is shown in FIG. 4 , and the thickness of the cooling fin 7 is preferably 1-2 mm.

As shown in Figure 4, a number of extensions 8 are also provided on the outer edge of the cooling fin 7, and a number of extensions 8 are respectively inserted into the first liquid cooling plate 2 and the second cooling plate. In the flow channel 6 of the liquid cooling plate 4 , the protruding part 8 is inserted into the edge of the flow channel 6 for sealing treatment, so as to prevent the cooling liquid in the flow channel 6 from flowing out. In addition to a plurality of protrusions 8 on the edge of the heat sink 7, the area of the main body of the heat sink 7 should be less than or equal to the area of the composite phase change material plate 3, so as to ensure that the heat sink 7 can be embedded in the composite phase change material plate 3 In addition, the larger the area of the heat sink 7 is, the better the heat dissipation effect on the composite phase change material plate 3 and the battery is.

It should be noted that, in this embodiment, the protruding parts 8 are only provided on both sides and the bottom of the cooling fin 7, and there are four protruding parts 8 on both sides of the cooling fin 7, and three protruding parts are provided on the bottom. 8. However, due to the existence of the positive and negative terminals 12 of the battery module, in this embodiment, no extension 8 is provided on the side of the heat sink 7 facing the positive and negative terminals 12 of the battery, as shown in FIG. 4 . The material and thickness of the protruding portion 8 and the heat sink 7 may be the same or different. The protruding length of the protruding portion 8 is preferably 3-4mm.

In this embodiment, the composite phase-change material plate 3 , the first liquid-cooled plate 2 and the second liquid-cooled plate 4 can be fixed by means of bolt fastening, so as to make the battery module more stable. At the same time, as long as it is ensured that a composite phase-change material plate 3 is arranged between each single battery 5, and that a composite phase-change material plate 3 is also provided on the outside of the two outermost single batteries 5 of the battery module, in order to improve the battery For the stability of the module, a metal plate can also be installed on the outside of the two composite phase-change material plates 3 on the outermost layer of the battery module, and the two metal plates clamp the multi-layer composite phase-change material plate 3 and the monomer The battery 5, as shown in Figure 1 and Figure 2, and two metal plates are fixed to the first liquid cooling plate 2 and the second liquid cooling plate 4 by means of bolt fastening, so as to effectively improve the stability and firmness of the device sex.

As shown in Figure 1, a water tank 9 and a water pump 10 are also provided in the box body 1, and the cooling liquid is filled in the water tank 9; the water tank 9, the first liquid cold plate 2 and the second liquid cold plate 4 are provided with a liquid inlet and a liquid outlet. The water tank 9 is used to store the cooling liquid; the water pump 10 is used to provide driving force to circulate the cooling liquid; the flow channel 6 is used to provide a flow channel for the cooling liquid.

In a certain embodiment, the first liquid cold plate 2 and the second liquid cold plate 4 can be connected to the water tank 9 in parallel through the conduit 11. The specific implementation is as follows: the liquid inlet of the water pump 10 is connected to the The liquid outlet of the water tank 9 is communicated, and the liquid outlet of the water pump 10 is respectively communicated with the liquid inlets of the first liquid cold plate 2 and the second liquid cold plate 4 through the conduit 11, and the first liquid cold plate 2 and the second liquid cold plate The liquid outlets of 4 communicate with the liquid inlets of the water tank 9 through conduits 11, and under the driving force of the water pump 10, the coolant in the first liquid cold plate 2, the second liquid cold plate 4, and the water tank 9 circulates. stand up.

In other embodiments, the first liquid cooling plate 2 and the second liquid cooling plate 4 can also be connected to the water tank 9 in series through the conduit 11. For example, the liquid inlet of the water pump 10 can be connected to the water tank 9 through the conduit 11. The liquid outlet is connected, the liquid outlet of the water pump 10 is connected with the liquid inlet of the first liquid cooling plate 2 through the conduit 11, and the liquid outlet of the first liquid cooling plate 2 is connected with the liquid inlet of the second liquid cooling plate 4 through the conduit 11 The liquid outlet of the second liquid cold plate 4 communicates with the liquid inlet of the water tank 9 through the conduit 11, thereby forming an integral circuit for circulating the cooling liquid.

In this embodiment, the conduit 11 can be a plastic hose, or a hard metal pipe, such as a copper pipe, which can be selected according to actual needs. It is easy to understand that the above two connection methods are just examples, and the connection methods of the first liquid cold plate 2, the second liquid cold plate 4, the water pump 10 and the water tank 9 can be selected according to the actual situation, as long as the water tank 9, the second water tank 9 The first liquid cold plate 2, the second liquid cooling and the coolant in the conduit 11 can circulate and flow, and the cooling of the heat sink 7 can be realized through the contact of the coolant with the extension part 8, and the heat sink 7 can be cooled. Heat away.

In this embodiment, the cooling liquid may be water, fluorinated liquid or mineral oil, or other cooling liquids with large specific heat capacity.

It is easy to understand that in this embodiment, what the water pump 10 pumps and what the water tank 9 stores is not limited to water, but can also be any other cooling fluid. This embodiment does not limit the specific components of the cooling liquid, and should not be used as a limitation to the protection scope of the present utility model. Any cooling liquid should be used within the protection scope of the present utility model.

In this embodiment, the number of flow channels 6 of the first liquid cooling plate 2 is 4, the width of each flow channel 6 is preferably 5-6 mm, and the liquid inlet and liquid outlet are on the same side, as shown in FIG. 5 . The number of flow channels 6 of the second liquid cold plate 4 is 3, the width of each flow channel 6 is preferably 5-6mm, and the liquid inlet and the liquid outlet are not on the same side, as shown in Figure 6, each liquid cold plate The number of runners 6 is equal to the number of protruding parts 8 at corresponding positions.

It should be noted that the flow channel 6 in the first liquid cold plate 2 and the second liquid cold plate 4 is actually a complete and curved fluid channel, so as to ensure that the cooling liquid can circulate along this flow channel 6, while The above-mentioned number of flow channels 6 refers to the part of the flow channels 6 that only flow through the single battery 5. The flow channels 6 of the first liquid cooling plate 2 are cut into four sections, while the flow channels of the second liquid cooling plate 4 Road 6 is cut into 3 sections. Moreover, the positions of the liquid inlets and liquid outlets of the first liquid cold plate 2 and the second liquid cold plate 4 can be set according to the actual situation in the box body 1, and may or may not be on the same side.

It should also be noted that the utility model does not limit the thickness of the composite phase change material plate 3, the extension length of the extension part 8, the thickness of the heat sink 7, the width of the flow channel 6, and the number of flow channels 6. The above-mentioned specific values are only The numerical values listed in this embodiment for the purpose of illustration are not fixed and unique, and can be determined according to actual needs.

In actual application, since the battery module will generate a lot of heat during operation, the composite phase-change material plate 3 embedded with the heat sink 7 is closely attached to both sides of each single battery 5, and the composite phase-change material plate 3 is used to The characteristics of its own phase change material make the composite phase change material plate 3 have good temperature uniformity and heat storage performance, which can reduce contact thermal resistance, improve heat transfer efficiency, and maintain the relationship between the individual cells 5 in the battery pack to a certain extent. The temperature difference between them improves the temperature uniformity of the battery module. At the same time, under the driving force of the water pump 10, there will be cooling liquid circulating in the flow channels 6 in the first liquid cold plate 2 and the second liquid cold plate 4, and the protruding part 8 on the cooling fin 7 is inserted into the In the flow channel 6, the protruding part 8 is fully in contact with the flowing cooling liquid, so that the heat on the cooling fin 7 can be quickly and timely guided into the cooling liquid, so that the circulating cooling liquid can take away a large amount of heat, and achieve the purpose of cooling the battery module. The effect of group cooling and cooling can keep the maximum temperature and temperature difference of the battery module within a reasonable working range, improve the working stability and safety of the battery module, and prolong the battery life. A large number of tests have shown that under the device of the utility model, the maximum temperature of the battery module can be at 20°C-50°C, the cooling efficiency is high, the cooling effect is good, and the problems of poor heat dissipation and poor temperature uniformity of the existing power battery can be solved .

In this description, specific examples have been used to illustrate the principle and implementation of the present utility model. The description of the above embodiments is only used to help understand the method of the present utility model and its core idea; meanwhile, for those of ordinary skill in the art, According to the idea of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (9)

1. The battery heat management device for the coupling liquid cooling of the composite phase change material plate is characterized by comprising a box body and a battery module arranged in the box body;

the first side surface and the second side surface of the battery module are respectively provided with a first liquid cooling plate; the first side and the second side are opposite;

a composite phase change material plate is respectively arranged on the third side and the fourth side of the battery module; the third side and the fourth side are opposite;

a second liquid cooling plate is arranged on the fifth side surface of the battery module; the fifth side face is opposite to the electrode end face of the battery module; the electrode end faces are faces where positive and negative wiring terminals of the battery module are located;

the battery module comprises a plurality of single batteries which are uniformly distributed; a composite phase change material plate is arranged between every two adjacent single batteries;

flow passages are arranged in the first liquid cooling plate and the second liquid cooling plate, and cooling liquid is filled in the flow passages;

each composite phase change material plate is embedded with a radiating fin, the outer edge of each radiating fin is provided with a plurality of extending parts, and the extending parts are respectively and correspondingly inserted into the flow channels of the first liquid cooling plate and the second liquid cooling plate;

a water tank and a water pump are also arranged in the box body, and the cooling liquid is filled in the water tank;

the inlet of water pump pass through the pipe with the liquid outlet of water tank intercommunication, the liquid outlet of water pump pass through the pipe respectively with the inlet of first liquid cold drawing with the second liquid cold drawing communicates, the liquid outlet of first liquid cold drawing with the liquid outlet of second liquid cold drawing pass through the pipe respectively with the inlet of water tank communicates.

2. The battery thermal management device according to claim 1, wherein the composite phase change material plate is made of expanded graphite, paraffin or epoxy resin.

3. The battery thermal management apparatus of claim 1, wherein the composite phase change material plate has a thickness of 5-6mm.

4. The battery thermal management apparatus of claim 1, wherein the battery cells are cuboid shaped batteries.

5. The battery thermal management device of claim 1, wherein the heat sink has a thickness of 1-2mm.

6. The battery thermal management device according to claim 1, wherein the protrusion is made of the same material and has the same thickness as the heat sink, and the protrusion length of the protrusion is 3-4mm.

7. The battery thermal management apparatus of claim 1, wherein the width of the flow channel of the first liquid cold plate is 5-6mm, and the liquid inlet and the liquid outlet are on the same side.

8. The battery thermal management apparatus of claim 1, wherein the width of the flow channel of the second liquid cooling plate is 5-6mm, and the liquid inlet and the liquid outlet are not on the same side.

9. The battery thermal management apparatus of claim 1, wherein the coolant is water, a fluorinated liquid, or a mineral oil.

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