CN214898582U

CN214898582U - Cooling system of automobile battery pack

Info

Publication number: CN214898582U
Application number: CN202120929045.2U
Authority: CN
Inventors: 何其艮; 岳泓亚; 尹福利; 袁昌荣; 牟丽莎
Original assignee: Chongqing Changan New Energy Automobile Technology Co Ltd
Current assignee: Deep Blue Automotive Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-26
Anticipated expiration: 2031-04-30

Abstract

The utility model provides a cooling system of car battery package relates to car battery thermal management technical field. The cooling system comprises an input pipeline and an output pipeline, wherein the input pipeline and the output pipeline are used for inputting and outputting a cooling medium; the inlet end of the output pipeline is provided with a confluence part; the cooling device also comprises a cooling area, wherein the cooling area is provided with a first cooling assembly and a second cooling assembly which are used for circulating a cooling medium; the inlet end of the first cooling assembly is communicated with the outlet end of the input pipeline, and the outlet end of the first cooling assembly is communicated with one inlet end of the confluence part; the inlet end of the second cooling assembly is communicated with the outlet end of the first cooling assembly, and the outlet end of the second cooling assembly is communicated with the other inlet end of the confluence part; the merging section is used to regulate the flow rate of the cooling medium flowing through the first cooling module and the second cooling module. The utility model discloses, after having solved current battery package cooling system cooling battery package, it is big that there is the difference in temperature battery package is inside, influences battery package discharge performance and life's problem.

Description

Cooling system of automobile battery pack

Technical Field

The utility model relates to a car battery thermal management technical field, concretely relates to cooling system of car battery package.

Background

At present, power batteries are widely applied to products such as electric automobiles, electric motorcycles and the like. The battery is used as an energy storage device element and is a key component of the electric automobile. Most of the existing hybrid electric vehicles adopt a power battery and an exhaust pipe to be arranged in parallel, the mode is arranged at the bottom of the vehicle, in the running process of an engine, the high-temperature heat of the exhaust pipe can continuously radiate to the surface of a battery module, the working condition is worse, the influence degree is larger, and therefore the temperature difference between two sides of a power battery pack is larger, and the temperature difference between two sides of the power battery pack is large.

The cooling system of the existing power battery usually adopts a liquid inlet pipe, a liquid outlet pipe and a plurality of cooling fins, and the cooling liquid flows through the inner cavities of the cooling fins to cool the battery pack. However, each cooling fin is parallelly connected each other, the unable flow that flows through every cooling fin of adjustment after the design is finalized the design, after radiating because of the outside heat source heat between the inside electric core of power battery, under the condition of difference in temperature grow, high temperature electric core and low temperature electric core are simultaneously cooled off under same flow, cause high temperature electric core cooling rate slower, low temperature electric core cooling rate is faster, thereby make the difference in temperature bigger and bigger, not only can make the discharge performance greatly reduced of battery package, and then influence power automobile's continuation of the journey mileage, still can influence the life of battery package simultaneously.

Disclosure of Invention

An object of the utility model is to provide a cooling system of car battery package to after solving current battery package cooling system cooling battery package, the battery package is inside to have the difference in temperature big, influences battery package discharge performance and life's problem.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a cooling system of an automobile battery pack comprises an input pipeline and an output pipeline, wherein the input pipeline and the output pipeline are used for inputting and outputting a cooling medium;

a confluence part is arranged at the inlet end of the output pipeline;

the cooling device also comprises a cooling area, wherein the cooling area is provided with a first cooling assembly and a second cooling assembly which are used for circulating a cooling medium;

the inlet end of the first cooling assembly is communicated with the outlet end of the input pipeline, and the outlet end of the first cooling assembly is communicated with one inlet end of the confluence part;

the inlet end of the second cooling assembly is also communicated with the outlet end of the first cooling assembly, and the outlet end of the second cooling assembly is communicated with the other inlet end of the confluence part;

the merging section is used to regulate the flow rate of the cooling medium flowing through the first cooling module and the second cooling module.

Preferably, the first cooling unit has a plurality of first cooling parts, and the second cooling unit has a plurality of second cooling parts, and the number of the first cooling parts is the same as that of the second cooling parts.

Preferably, the cooling zone is further provided with a first flow collecting member disposed between the outlet end of the input pipe and the inlet end of the first cooling module.

Preferably, the first collecting part is a first collecting pipe having a first inlet end for communicating with the outlet end of the input pipe, and a plurality of first outlet ends for communicating with the inlet ends of the plurality of first cooling parts, respectively.

Preferably, the cooling zone is further provided with a second current collecting part which is arranged between the outlet end of the first cooling assembly and the inlet end of the second cooling assembly.

Preferably, the second collecting part is a second collecting pipe having a plurality of second inlet ends respectively for communicating with the outlet ends of the plurality of first cooling parts, a second outlet end for communicating with one inlet end of the merging part, and a plurality of third outlet ends respectively for communicating with the inlet ends of the plurality of second cooling parts.

Preferably, a communication pipeline is further arranged between the second outlet end and one inlet end of the confluence part.

Preferably, the cooling zone is further provided with a third flow collecting part arranged between the outlet end of the second cooling module and the other inlet end of the flow merging part.

Preferably, the third collecting pipe is a third collecting pipe having a plurality of third inlet ends respectively for communicating with the outlet ends of the plurality of second cooling parts, and a fourth outlet end for communicating with the other inlet end of the merging part.

Preferably, the merging part is an electronic three-way valve.

The utility model has the advantages that:

1) the utility model discloses, through setting up first cooling module and second cooling module in the cooling zone, and adjust the flow of the coolant in first cooling module and the second cooling module through the confluence part, make the flow of the coolant in first cooling module and the second cooling module different, when there is the difference in temperature in the battery package, through controlling the confluence subassembly and having realized the flow of the coolant of increase high temperature region or having reduced the flow of the coolant of low temperature region, thereby realized reducing the difference in temperature in the battery package, make the difference in temperature in the battery package within controllable range, improved the discharge performance of battery package, prolonged the life of battery package;

2) secondly, through the bottom at the battery package, set up a plurality of first cooling part and second cooling part, through setting up a plurality of mouth organ pipes promptly, further improved the cooling efficiency to the battery package, and have simple structure, the spare part of involving is few, easy dismounting's advantage has popularization practical value in car battery thermal management field.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing a structure in which an output pipe is connected to a merging section;

FIG. 3 is a schematic view of the structure of the cooling zone;

FIG. 4 is a schematic structural diagram of the flow of a cooling medium under the pure EV working condition;

FIG. 5 is a schematic view of the structure of the flow of the cooling medium in the low load condition of the HEV;

FIG. 6 is a schematic diagram of the flow of the cooling medium during high load operation of the HEV.

The cooling system comprises a 1-input pipeline, a 2-output pipeline, a 3-confluence part, a 4-first cooling assembly, a 401-first cooling part, a 5-second cooling assembly, a 501-second cooling part, a 6-first collecting part, a 601-first inlet end, a 602-first outlet end, a 7-second collecting part, a 701-second inlet end, a 702-second outlet end, a 703-third outlet end, an 8-communication pipeline, a 9-third collecting part, a 901-third inlet end and a 902-fourth outlet end.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings and preferred embodiments, and other advantages and effects of the invention will be easily understood by those skilled in the art from the disclosure in the specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

As shown in fig. 1 to 3, a cooling system of a battery pack for an automobile includes an input duct 1 and an output duct 2 for input and output of a cooling medium; the inlet end of the output pipeline 2 is provided with a confluence part 3; the cooling device also comprises a cooling area, wherein the cooling area is provided with a first cooling assembly 4 and a second cooling assembly 5 which are used for circulating a cooling medium; the inlet end of the first cooling module 4 is communicated with the outlet end of the input pipeline 1, and the outlet end is communicated with one inlet end of the confluence part 3; the inlet end of the second cooling module 5 is also communicated with the outlet end of the first cooling module 4, and the outlet end is communicated with the other inlet end of the confluence part 3; the merging section 3 is used to regulate the flow rate of the cooling medium flowing through the first cooling module 4 and the second cooling module 5.

Through setting up first cooling module and second cooling module in the cooling zone to adjust the flow of the coolant in first cooling module and the second cooling module through the confluence part, make the flow of the coolant in first cooling module and the second cooling module different, when there is the difference in temperature inside the battery package, realize the flow of the coolant of increase high temperature region or the flow of the coolant of reduction low temperature region through the confluence subassembly, thereby realized reducing the inside difference in temperature of battery package, the discharge performance of battery package has been improved, the life of battery package has been prolonged.

Wherein, input pipeline and output pipeline all are connected with air conditioning unit assembly, realize the circulation of cooling medium in the cooling system of this application battery package. The cooling area is located the bottom of battery module, and the direction that cooling medium flows in the cooling area is perpendicular to the exhaust direction mutually of blast pipe, and first cooling module is located the one end of being close to the blast pipe, and the second cooling module is located the one end of keeping away from the blast pipe.

The first cooling unit 4 has a plurality of first cooling members 401, the second cooling unit 5 has a plurality of second cooling members 501, and the number of the first cooling members 401 is the same as that of the second cooling members 501. The first cooling member 401 and the second cooling member 501 are each a harmonica tube.

Through the bottom at the battery package, set up a plurality of first cooling part and second cooling part, further improved the cooling efficiency of battery package.

The cooling zone is also provided with a first collecting member 6, which is arranged between the outlet end of the inlet conduit 1 and the inlet end of the first cooling module 4.

The first collecting member 6 is a first collecting pipe having a first inlet 601 for communicating with the outlet of the input pipe 1, and a plurality of first outlet 602 for communicating with the inlet of the plurality of first cooling members 401, respectively. After flowing into the first collecting pipe through the input pipeline, the cooling medium flows into each first cooling part through a plurality of first outlet ends respectively so as to realize uniform cooling of the battery pack.

The cooling zone is also provided with a second collecting member 7, which is arranged between the outlet end of the first cooling module 4 and the inlet end of the second cooling module 5.

The second collecting member 7 is a second collecting pipe having a plurality of second inlet ports 701 for communicating with the outlet ports of the plurality of first cooling members 401, respectively, a second outlet port 702 for communicating with one inlet port of the merging member 3, and a plurality of third outlet ports 703 for communicating with the inlet ports of the plurality of second cooling members 501, respectively.

A communication duct 8 is also provided between the second outlet end 702 and one inlet end of the merging section 3.

The cooling zone is also provided with a third collecting member 9 provided between the outlet end of the second cooling module 5 and the other inlet end of the flow merging member 3.

The third header part 9 is a third header having a plurality of second inlet ports 901 for communicating with outlet ports of the plurality of second cooling parts 501, respectively, and a fourth outlet port 902 for communicating with the other inlet port of the merging part 3.

The merging part 3 is an electronic three-way valve. Two cooling medium inlet ends of the electronic three-way valve can be selectively opened at the same time or one of the two cooling medium inlet ends is opened, so that a flow channel of the cooling medium is adjusted, the cooling requirements of the battery in different states are met, the cooling medium can uniformly flow in the harmonica tube, heat generated by the battery pack is uniformly taken away, and the purpose of controlling the temperature difference of the battery pack is achieved.

Input pipeline, pressure manifold, mouth organ pipe and output pipeline in this application all pass through welded fastening.

As shown in FIG. 4, the power battery pack heat is equalized during pure EV operation. The inlet of the electronic three-way valve connected with the second outlet end can be closed, the inlet of the electronic three-way valve connected with the fourth outlet end is opened, and the cooling medium flows through the first collecting pipe, the first cooling part, the second collecting pipe, the second cooling part and the third collecting pipe in sequence through the input pipeline, flows into the electronic three-way valve and then flows out of the output pipeline, so that the battery pack is uniformly cooled. The direction of the arrow in fig. 4 is the flow direction of the cooling medium under the pure EV operating condition.

As shown in fig. 5, during low-load HEV conditions, the engine exhaust pipe is close to the coolant inlet end, which is slightly affected by the engine exhaust pipe, but a temperature differential already exists within the power cell package. At the moment, the inlet that the electron three-way valve links to each other with the second exit end and the inlet that the electron three-way valve links to each other with the fourth exit end simultaneously, cooling medium passes through the input pipeline, partly flows through first pressure manifold in proper order, first cooling part, the second pressure manifold, behind second cooling part and the third pressure manifold, another part flows through first pressure manifold in proper order, behind first cooling part and the second pressure manifold, flow in the output pipeline after the confluence through the electron three-way valve, so make the flow that flows through the cooling medium of first cooling part be greater than the second cooling part, thereby the difference in temperature in the power battery package has been reduced, the even cooling to the battery package has been realized. The direction of the arrow in FIG. 5 is the flow direction of the cooling medium during low load operation of the HEV.

As shown in fig. 6, in the high load condition of the HEV, the engine exhaust pipe is close to the cooling medium inlet end, which is severely affected by the engine exhaust pipe, and a large temperature difference exists in the power battery pack. At the moment, the inlet connected with the second outlet end of the electronic three-way valve can be opened, the inlet connected with the fourth outlet end of the electronic three-way valve is closed, cooling medium passes through the input pipeline, flows into the output pipeline after sequentially flowing through the first collecting pipe, the first cooling part and the second collecting pipe and flowing into the output pipeline after passing through the electronic three-way valve, so that the cooling medium only flows into the output pipeline after flowing through the first cooling part and directly flows into the output pipeline through the electronic three-way valve, the temperature difference in the power battery pack is reduced, and the influence of the temperature difference in the battery pack is balanced. The direction of the arrows in FIG. 6 is the flow direction of the cooling medium during high load operation of the HEV.

The utility model provides a pair of cooling system of car battery package, at first, through setting up first cooling module and second cooling module in the cooling zone, and adjust the flow of the coolant in first cooling module and the second cooling module through the confluence part, make the flow of the coolant in first cooling module and the second cooling module different, when there is the difference in temperature in the battery package inside, realize increasing the flow of the coolant in high-temperature region or reducing the flow of the coolant in low-temperature region through the confluence subassembly, thereby realized reducing the difference in temperature in the battery package, make the difference in temperature in the battery package within controllable scope, the discharge performance of battery package has been improved, the life of battery package has been prolonged; secondly, through in the bottom of battery package, set up a plurality of first cooling part and second cooling part, through setting up a plurality of mouth organ pipes promptly, further improved the cooling efficiency to the battery package, in car battery thermal management field, had the practical value of popularization.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model.

Claims

1. A cooling system of a vehicle battery pack, characterized by comprising an input pipe (1) and an output pipe (2) for input and output of a cooling medium;

a confluence part (3) is arranged at the inlet end of the output pipeline (2);

the cooling device also comprises a cooling area, wherein the cooling area is provided with a first cooling assembly (4) and a second cooling assembly (5) which are used for circulating a cooling medium;

the inlet end of the first cooling assembly (4) is communicated with the outlet end of the input pipeline (1), and the outlet end of the first cooling assembly is communicated with one inlet end of the confluence part (3);

the inlet end of the second cooling assembly (5) is also communicated with the outlet end of the first cooling assembly (4), and the outlet end is communicated with the other inlet end of the confluence part (3);

the merging means (3) is used for adjusting the flow rate of the cooling medium flowing through the first cooling module (4) and the second cooling module (5).

2. The cooling system of a battery pack for an automobile according to claim 1, wherein the first cooling module (4) has a plurality of first cooling parts (401), and the second cooling module (5) has a plurality of second cooling parts (501), and the number of the first cooling parts (401) and the number of the second cooling parts (501) are the same.

3. The cooling system of a vehicle battery pack according to claim 2, wherein the cooling zone is further provided with a first current collecting member (6) provided between the outlet end of the inlet duct (1) and the inlet end of the first cooling module (4).

4. The cooling system of an automotive battery pack as claimed in claim 3, characterised in that said first manifold member (6) is a first manifold having a first inlet end (601) for communicating with the outlet end of said inlet duct (1), a plurality of first outlet ends (602) for communicating with the inlet ends of a plurality of said first cooling members (401), respectively.

5. The cooling system for a vehicle battery pack according to claim 2, wherein the cooling zone is further provided with a second current collecting member (7) provided between the outlet end of the first cooling module (4) and the inlet end of the second cooling module (5).

6. The cooling system for a vehicle battery pack according to claim 5, wherein the second collecting member (7) is a second collecting pipe having a plurality of second inlet ports (701) for communicating with outlet ports of a plurality of the first cooling members (401), respectively, a second outlet port (702) for communicating with one inlet port of the merging member (3), and a plurality of third outlet ports (703) for communicating with inlet ports of a plurality of the second cooling members (501), respectively.

7. The cooling system for a vehicle battery pack according to claim 6, wherein a communication pipe (8) is further provided between the second outlet port (702) and one inlet port of the merging part (3).

8. The cooling system for an automobile battery pack according to claim 2, wherein the cooling zone is further provided with a third current collecting part (9) provided between an outlet end of the second cooling module (5) and another inlet end of the merging part (3).

9. The cooling system for a vehicle battery pack according to claim 8, wherein said third manifold member (9) is a third manifold having a plurality of third inlet ports (901) for communicating with outlet ports of a plurality of said second cooling members (501), respectively, and a fourth outlet port (902) for communicating with the other inlet port of said merging member (3).

10. The cooling system of an automobile battery pack according to claim 1, wherein the merging member (3) is an electronic three-way valve.