CN118281435A - Battery cooling system, power battery for vehicle and cooling control method thereof - Google Patents

Abstract

The application particularly relates to a battery cooling system, a vehicle power battery and a cooling control method thereof, and aims to solve the technical problems that the temperature difference of an internal battery core is too high and the consistency of the battery core capacity is poor due to the fact that a single-side in-out liquid cooling scheme is adopted in a power battery pack. To this end, the present application provides a battery cooling system comprising a liquid cooled conduit assembly and a heat dissipating assembly. The liquid cooling pipeline assembly is arranged on the battery pack and is provided with two liquid inlets and two liquid outlets which are respectively arranged at two ends of the battery pack, and each liquid inlet is communicated with any liquid outlet. The heat dissipation assembly is provided with a cold liquid flow outlet and a hot liquid reflux outlet, the cold liquid flow outlet is communicated with the two liquid inlets, the hot liquid reflux outlet is communicated with the two liquid outlets, and the cooling liquid is suitable for flowing in the liquid cooling pipeline assembly and the heat dissipation assembly. The application ensures that the heat dissipation effects of the two ends and the middle part of the battery pack are consistent, can achieve better heat dissipation, and avoids the influence on the battery performance due to overhigh temperature difference of the battery cells at different positions inside.

Description

Battery cooling system, power battery for vehicle and cooling control method thereof

Technical Field

The application relates to the technical field of vehicles, in particular to a battery cooling system, a vehicle power battery and a cooling control method thereof.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

With the development of power batteries for vehicles, the integration of power battery packs is higher and higher, the internal battery cells are denser and denser, and meanwhile, the charging speed is required to be higher and higher, so that the heat dissipation of the current power battery packs is more and more difficult.

At present, the design of power battery packs of various manufacturers basically adopts a liquid cooling scheme of single-side inlet and outlet, and a cooling liquid inlet and a cooling liquid outlet are arranged at the front part or the rear part of a vehicle. Therefore, the heat dissipation scheme has good heat dissipation effect from the electric core at the position of the liquid inlet and the position of the liquid outlet, and poor heat dissipation effect from the electric core at the position of the liquid inlet and the liquid outlet, so that the phenomenon that the temperature difference of the electric core inside the power battery pack is too high occurs, and the consistency of the capacity of the electric core is poor.

Disclosure of Invention

The application aims to at least solve the technical problems that the temperature difference of an internal battery core is too high and the consistency of the battery core capacity is poor due to the adoption of a liquid cooling scheme of single-side inlet and outlet of a power battery pack, and the application is realized by the following technical scheme:

In a first aspect, the present application provides a battery cooling system comprising a liquid cooled conduit assembly and a heat sink assembly. Wherein, the liquid cooling pipeline subassembly is laid in the battery package, and is equipped with a set of coolant liquid interface respectively at battery package first direction X's both ends, and every coolant liquid interface of group includes a inlet and a liquid outlet, and each inlet all communicates with arbitrary liquid outlet. The heat dissipation assembly is provided with a cold liquid flow outlet and a hot liquid reflux outlet, the cold liquid flow outlet is communicated with the two liquid inlets, the hot liquid reflux outlet is communicated with the two liquid outlets, and the cooling liquid is suitable for flowing in the liquid cooling pipeline assembly and the heat dissipation assembly.

In the battery cooling system provided by the application, the liquid cooling pipeline component and the heat dissipation component are respectively provided with the cooling liquid input and output ports on two sides of the battery pack, so that the heat dissipation effects of the two ends and the middle part of the battery pack are consistent, better heat dissipation can be achieved, and the influence on the battery performance due to overhigh temperature difference of the battery cells at different positions inside the battery pack is avoided.

In some embodiments, the liquid cooled conduit assembly includes a first main conduit, a second main conduit, and a branch conduit. The first main pipeline is arranged on one side of the battery pack in the second direction Y, is distributed along the first direction X, and liquid inlets are respectively formed in two ends of the first main pipeline. The second main pipeline is arranged on the other side of the second direction Y of the battery pack, is distributed along the first direction X of the battery pack, and liquid outlets are respectively formed at two ends of the second main pipeline. The branch pipelines are distributed along the second direction Y, are arranged between the first main pipeline and the second main pipeline, and are communicated with the first main pipeline and the second main pipeline; wherein the first direction X is perpendicular to the second direction Y.

In some embodiments, the liquid cooled conduit assemblies are symmetrically disposed on both sides of the first direction X.

In some embodiments, the branch lines have a plurality of branch lines spaced apart along the first direction X.

In some embodiments, the pipe diameter of the first main pipe gradually decreases from both ends of the battery pack to the middle of the battery pack.

In some embodiments, solenoid valves are provided at the inlets of the respective branch lines.

In some embodiments, the battery cooling system further comprises a control unit and a battery management module. The control unit is in communication connection with the electromagnetic valves, and can control the independent opening and closing of each electromagnetic valve. The battery management module is electrically connected with the control unit, and can monitor the temperature of each part of the battery pack and feed back the temperature to the control unit.

In some embodiments, the battery cooling system further comprises a liquid pump having two liquid pumps disposed between the two liquid inlets and the cold liquid flow outlet, respectively.

In some embodiments, the liquid pumps are communicatively coupled to a control unit that is capable of controlling the start and stop and output power of each liquid pump.

In some embodiments, the heat dissipating assembly includes a coolant temporary tank and a heat sink. The cooling liquid temporary storage tank is provided with two cooling liquid flow outlets which are communicated with the two liquid inlets in a one-to-one correspondence manner. The radiator is communicated with the cooling liquid temporary storage tank, and is provided with two hot liquid reflux ports which are communicated with the two liquid outlets in a one-to-one correspondence manner.

In a second aspect, the present application also provides a power battery for a vehicle, comprising a battery pack and the battery cooling system of the first aspect, the battery cooling system being adapted to cool the battery pack.

In a third aspect, the present application also provides a cooling control method for a power battery for a vehicle, including the steps of:

under the working condition of starting the vehicle, acquiring the temperature of each battery cell of the battery pack;

Judging whether the temperature of the power core exceeds the safe temperature, if so, controlling the starting of the liquid pump and regulating the output power of the liquid pump;

And determining branch pipelines where the over-temperature battery cells are located, and controlling the electromagnetic valves of the corresponding branch pipelines to be opened until the temperature of the battery cells is lower than the safe temperature.

In some embodiments, the step of "controlling the liquid pump to start and adjust its output power" comprises: the battery management module feeds back the temperature of the battery core to the control unit, and the control unit dynamically adjusts the output power of the liquid pump in real time, so that the consistency of the cooling liquid flow rate at the liquid inlets at the two ends of the first direction X is ensured, and the volumes of the cooling liquid flowing through the surfaces at the two ends of the battery core in the same time are consistent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures.

In the drawings:

Fig. 1 is a schematic structural view of a power battery for a vehicle according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a portion of a liquid cooling circuit assembly according to one embodiment of the application;

fig. 3 is a flowchart of a cooling control method of a power battery for a vehicle according to an embodiment of the present application.

Wherein, the reference numerals are as follows:

101. A battery pack; 102. a first main line; 103. a second main line; 104. a branch pipeline; 105. an electromagnetic valve; 106. a control unit; 107. a battery management module; 108. a liquid pump; 109. a cooling liquid temporary storage tank; 110. a heat sink.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present application, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

For ease of description, spatially relative terms, such as "medium," "inner," "top," "circumferential," "side," "bottom," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

The Battery management module described in the embodiments of the present application is also referred to as a Battery Management System (BMS) and is capable of monitoring the temperature of each place inside the Battery, and managing the charge and discharge of the Battery, so that the Battery is in an optimal state.

As shown in fig. 1 to 3, in order to solve the technical problems that the temperature difference of an internal battery core is too high and the consistency of the battery core capacity is poor due to the fact that a liquid cooling scheme of single-side inlet and outlet is adopted in a power battery pack, the embodiment of the application provides a battery cooling system, a vehicle power battery and a cooling control method of the vehicle power battery.

Specific embodiments of battery cooling systems are described in detail below in conjunction with fig. 1 and 2.

In a first aspect, referring to fig. 1, the present application provides a battery cooling system comprising a liquid cooled conduit assembly and a heat sink assembly. Wherein, the liquid cooling pipeline subassembly is laid in battery package 101, and is equipped with a set of coolant liquid interface respectively at battery package 101 first direction X's both ends, and every coolant liquid interface of group includes a inlet and a liquid outlet, and each inlet all communicates with arbitrary liquid outlet. The heat dissipation assembly is provided with a cold liquid flow outlet and a hot liquid reflux outlet, the cold liquid flow outlet is communicated with the two liquid inlets, the hot liquid reflux outlet is communicated with the two liquid outlets, and the cooling liquid is suitable for flowing in the liquid cooling pipeline assembly and the heat dissipation assembly.

Specifically, in the battery cooling system provided by the application, the liquid cooling pipeline component and the heat dissipation component are respectively provided with the cooling liquid input and output ports on two sides of the battery pack 101, so that the heat dissipation effects of two ends and the middle of the battery pack 101 are consistent, better heat dissipation can be achieved, and the influence on the battery performance due to overhigh temperature difference of the battery cells at different positions inside is avoided.

More specifically, the liquid cooling circuit assembly is preferably laid on the main side of the battery pack 101, i.e., the side with the largest area. The cooling liquid flows out from the cooling liquid flow outlet of the heat dissipation assembly, then flows into the liquid cooling pipeline assembly from the two liquid inlets at the two ends of the battery pack 101, exchanges heat with the battery pack 101, heats the cooling liquid, then flows out from the two liquid outlets at the two ends of the battery pack 101, and returns to the heat dissipation assembly through the hot liquid return port to dissipate heat and cool, thereby completing the closed loop.

In particular, the cooling liquid is preferably water; in addition, a plurality of electric cells are disposed in the battery pack 101, and the direction in which the electric cells are arranged is the first direction X of the battery pack 101, i.e., the length direction, and the direction perpendicular to the first direction X of the battery pack 101 is the second direction Y of the battery pack 101, i.e., the width direction.

In some embodiments, referring to fig. 1, the liquid cooled conduit assembly includes a first main conduit 102, a second main conduit 103, and a branch conduit 104. The first main pipe 102 is disposed at one side of the battery pack 101 in the second direction Y, the first main pipe 102 is distributed along the first direction X, and two ends of the first main pipe 102 are respectively provided with a liquid inlet. The second main pipeline 103 is arranged at the other side of the second direction Y of the battery pack 101, the second main pipeline 103 is distributed along the first direction X, and two ends of the second main pipeline 103 are respectively provided with liquid outlets. The branch pipelines 104 are distributed along the second direction Y, are arranged between the first main pipeline 102 and the second main pipeline 103, and are communicated with the first main pipeline 102 and the second main pipeline 103, wherein the first direction X is perpendicular to the second direction Y.

Specifically, this scheme is the concrete implementation of liquid cooling pipeline subassembly, and first main pipeline 102 and second main pipeline 103 realize respectively that battery package 101 both ends set up the purpose of inlet and liquid outlet respectively, and branch pipeline 104 communicates inlet and liquid outlet, reasonable in design.

Preferably, the first main pipe 102 and the second main pipe 103 extend along the length direction of the main side of the battery pack 101, and are respectively located at the upper and lower sides of the main side, and the branch pipe 104 is provided therebetween and extends along the width direction of the main side of the battery pack 101.

In addition, the first main pipeline 102 and the second main pipeline 103 may be respectively disposed on two adjacent sides of the main side of the battery pack 101, and may also extend along the length direction of the battery pack 101, and the branch pipeline 104 may also be disposed between the two, and the branch pipeline 104 may also be disposed obliquely, instead of extending along the width direction of the battery pack 101.

In some embodiments, the liquid cooled conduit assemblies are symmetrically disposed on both sides of the first direction X.

In some embodiments, referring to fig. 1, the branch lines 104 have a plurality of branch lines 104 spaced apart along the first direction X.

Specifically, in this scheme, to the further preferred setting of branch pipeline 104, a plurality of branch pipelines 104 are located between first main pipeline 102 and the second main pipeline 103 to the length direction interval setting of preferred along battery package 101 can carry out the heat transfer to the electric core of different positions in the battery package 101, makes battery package 101 heat dissipation more even, avoids inside difference in temperature too big.

In some embodiments, referring to fig. 1 and 2, the pipe diameter of the first main pipe 102 gradually decreases from both ends of the battery pack 101 to the middle of the battery pack 101.

Specifically, in this solution, the first main pipeline 102 is further preferably configured, where the pipe diameter of the first main pipeline 102 gradually decreases from two ends to the middle, so that the hydraulic pressure is always greater when the cooling liquid flows from two liquid inlets at two ends of the battery pack 101 to the middle, and the flow velocity of the cooling liquid flowing in the first main pipeline 102 to the middle is maintained.

More specifically, when the coolant flows from the liquid inlets at the two ends of the first main pipeline 102 to the middle, the flow is gradually reduced due to the phenomenon of being continuously split by the branch pipeline 104 or being hung on the liquid, so that the pipe diameter needs to be reduced to increase the hydraulic pressure and maintain a stable flow rate.

Particularly, the pipe diameter of the first main pipe 102 may be changed continuously and smoothly, or may be changed in a stepped bamboo-like manner, and referring to fig. 2, both the two ways can achieve the purpose of ensuring the hydraulic pressure and maintaining the flow velocity, which falls within the protection scope of the present application.

Further, fig. 2 shows a structure of one end of the first main pipe 102, and the X direction in the drawing is the flowing direction of the coolant.

In some embodiments, referring to fig. 1 and 2, a solenoid valve 105 is provided at the inlet of each branch pipe 104.

Specifically, this scheme is for the further preferred setting to the branch pipeline 104, and each branch pipeline 104 can be independently break-make through solenoid valve 105 to the cooling heat dissipation is carried out to each electric core in the battery package 101 to the subregion, promotes radiating efficiency, saves the energy consumption.

Particularly, the battery valve is preferably a three-way valve, and the three-way valve not only can control the on-off of the branch pipeline 104, but also can control the on-off of the first main pipeline 102, so that the control is more flexible, the treatment of various working conditions is convenient, and the section-by-section maintenance and inspection of the first main pipeline 102 are facilitated.

In some embodiments, referring to fig. 1, the battery cooling system further includes a control unit 106 and a battery management module 107. The control unit 106 is in communication connection with the solenoid valves 105, and the control unit 106 can control the independent opening and closing of each solenoid valve 105. The battery management module 107 is electrically connected to the control unit 106, and the battery management module 107 can monitor the temperature of the battery pack 101 and feed back the temperature to the control unit 106.

Specifically, this scheme is the further preferred setting to control scheme, utilizes battery management module 107 real-time supervision battery package 101 each electric core temperature to feed back to control unit 106, and control unit pertinently controls the solenoid valve 105 of corresponding branch pipeline 104 and opens, carries out fixed point heat dissipation cooling, keeps each electric core all to be in temperature safety temperature, and the controllability is strong, has pertinence, promotes radiating efficiency, saves the energy consumption.

In some embodiments, referring to fig. 1, the battery cooling system further includes a liquid pump 108, two liquid pumps 108 disposed between the two liquid inlets and the cold liquid flow outlet, respectively.

Specifically, the liquid pump 108 provided by the scheme is convenient for provide power for cooling liquid circulation, and the two liquid pumps 108 are respectively arranged between the two liquid inlets and the cooling liquid flow outlet and respectively provide driving for cooling liquid to enter the first main pipeline 102 from the liquid inlets at two ends of the battery pack 101, so that the purpose of uniform heat dissipation effect at two ends of the battery pack 101 is achieved.

In addition, the two liquid pumps 108 are arranged to provide a layer of guarantee for the normal operation of the battery pack 101, so that the problem that the battery pack 101 cannot continuously obtain heat dissipation after the single liquid pump 108 fails is avoided.

In some embodiments, referring to fig. 1, the fluid pumps 108 are communicatively coupled to a control unit 106, and the control unit 106 is capable of controlling the start-stop and output power of each fluid pump 108.

Specifically, this solution is a further preferred setting for the control solution, where the control unit 106 not only can control the independent opening and closing of each electromagnetic valve 105, but also can control the start and stop and the output power of each liquid pump 108, so that the liquid inlets at two ends of the cooling liquid ensure consistent flow and hydraulic pressure.

More specifically, depending on the actual installation situation or environmental changes at the two ends of the battery pack 101 during use, the liquid inlets at the two ends of the battery pack 101 may have flow deviations, so that the flow at the two ends is inconsistent, which requires adjusting the output power of the two liquid pumps 108.

In addition, when the temperature of a certain battery cell close to one end in the battery pack 101 exceeds the safe temperature, the fixed-point cooling effect can be realized by only starting the liquid pump 108 at the end, so that two liquid pumps 108 are not required to be started, and the energy consumption is saved.

In some embodiments, referring to fig. 1, the heat sink assembly includes a coolant surge tank 109 and a heat sink 110. The cooling liquid temporary storage tank 109 has two cooling liquid flow outlets, which are communicated with the two liquid inlets in one-to-one correspondence. The radiator 110 is communicated with the cooling liquid temporary storage tank 109, and the radiator 110 is provided with two hot liquid reflux ports which are communicated with two liquid outlets in a one-to-one correspondence manner.

Specifically, the present embodiment is a specific embodiment of the heat dissipation assembly, and the cooling liquid may first enter the cooling liquid temporary storage tank 109 for buffering, so as to be used; on the other hand, the cooling liquid after the heat exchange is completed enters the radiator 110 to perform heat radiation and temperature reduction, and then flows back to the cooling liquid temporary storage tank 109 to form a closed loop.

In particular, the cooling liquid temporary storage tank 109 may have only one cooling liquid outlet, and may be respectively conveyed to two liquid inlets through a pipeline; similarly, the heat dissipation component can also be provided with only one hot liquid reflux port, and the hot liquid reflux ports respectively flow back through two liquid outlets; the above scheme also belongs to the protection scope of the application.

In a second aspect, referring to fig. 1, the present application also provides a power battery for a vehicle, including a battery pack 101 and a battery cooling system in the first aspect, the battery cooling system being adapted to cool the battery pack 101.

In particular, the present solution proposes a power battery for a vehicle comprising the battery cooling system of the first aspect, so that the power battery for a vehicle of the second aspect has all the advantages of the battery cooling system of the first aspect.

The embodiments of the present application merely illustrate the structure of the power battery for vehicles related to the improvement point of the present application, and do not represent that the power battery for vehicles of the present application does not have other structures, such as an electrical system, a frame structure, etc., and the other structures are not illustrated herein.

In a third aspect, referring to fig. 3, the present application further provides a cooling control method of a power battery for a vehicle, including the steps of:

under the working condition of starting the vehicle, acquiring the temperature of each battery cell of the battery pack 101;

judging whether the temperature of the power core exceeds the safe temperature, if so, controlling the liquid pump 108 to start and regulating the output power of the liquid pump;

And determining a branch pipeline 104 where the over-temperature battery cell is located, and controlling the electromagnetic valve 105 of the corresponding branch pipeline to be opened until the temperature of the battery cell is lower than the safe temperature.

Specifically, when the control unit 106 determines that the cell temperature does not exceed the safety temperature, the control unit 106 continues to acquire the temperature of the battery pack 101 through the battery management module 107 and makes a determination; in addition, after the liquid pump 108 is started to radiate heat from the battery cell, the control unit 106 continues to obtain the temperatures of the battery pack 101 through the battery management module 107 and makes a judgment, and after the temperature of the battery cell is judged to be lower than the safety temperature, the liquid pump 108 is controlled to be turned off.

In some embodiments, the step of "controlling the liquid pump 108 to start and regulate its output power" includes: the battery management module 107 feeds back the temperature of the battery core to the control unit 106, and the control unit 106 dynamically adjusts the output power of the liquid pump 108 in real time, so as to ensure that the cooling liquid flow rates at the liquid inlets at the two ends of the first direction X are consistent, and the volumes of the cooling liquid flowing through the surfaces at the two ends of the battery core in the same time are consistent.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (13)

1. A battery cooling system, comprising:

the liquid cooling pipeline assembly is paved on the battery pack, a group of cooling liquid interfaces are respectively arranged at two ends of the battery pack in the first direction X, each group of cooling liquid interfaces comprises a liquid inlet and a liquid outlet, and each liquid inlet is communicated with any liquid outlet;

the heat dissipation assembly is provided with a cold liquid flow outlet and a hot liquid reflux outlet, the cold liquid flow outlet is communicated with the two liquid inlets, the hot liquid reflux outlet is communicated with the two liquid outlets, and the cooling liquid is suitable for flowing in the liquid cooling pipeline assembly and the heat dissipation assembly.

2. The battery cooling system of claim 1, wherein the liquid cooled conduit assembly comprises:

The first main pipeline is arranged at one side of the second direction Y of the battery pack, is distributed along the first direction X, and is provided with liquid inlets at two ends respectively;

the second main pipeline is arranged on the other side of the second direction Y of the battery pack, is distributed along the first direction X, and is provided with liquid outlets at two ends respectively;

the branch pipelines are distributed along the second direction Y, are arranged between the first main pipeline and the second main pipeline, and are communicated with the first main pipeline and the second main pipeline;

wherein the first direction X is perpendicular to the second direction Y.

3. The battery cooling system of claim 2, wherein the liquid cooled conduit assemblies are symmetrically disposed on both sides of the first direction X.

4. The battery cooling system of claim 2, wherein the branch pipes have a plurality of the branch pipes spaced apart along the first direction X.

5. The battery cooling system of claim 3 wherein the first main conduit tapers from both ends of the battery pack to a middle of the battery pack.

6. A battery cooling system according to claim 3, wherein an electromagnetic valve is provided at the inlet of each of said branch pipes.

7. The battery cooling system of claim 6, further comprising:

The control unit is in communication connection with the electromagnetic valves and can control the independent opening and closing of each electromagnetic valve;

And the battery management module is electrically connected with the control unit and can monitor the temperature of each part of the battery pack and feed back the temperature to the control unit.

8. The battery cooling system of claim 7, further comprising:

the liquid pumps are arranged between the two liquid inlets and the cold liquid flow outlet respectively.

9. The battery cooling system of claim 8, wherein the liquid pumps are communicatively coupled to the control unit, the control unit being capable of controlling the start-stop and output power of each of the liquid pumps.

10. The battery cooling system of any one of claims 1 to 8, wherein the heat dissipation assembly comprises:

The cooling liquid temporary storage tank is provided with two cooling liquid flow outlets which are communicated with the two liquid inlets in a one-to-one correspondence manner;

The radiator is communicated with the cooling liquid temporary storage tank and is provided with two hot liquid reflux ports, and the two hot liquid reflux ports are communicated with the two liquid outlets in a one-to-one correspondence manner.

11. A power battery for a vehicle, characterized by comprising a battery pack and a battery cooling system according to any one of claims 1 to 9, said battery cooling system being adapted to cool said battery pack.

12. A cooling control method of a power battery for a vehicle, comprising the steps of:

under the working condition of starting the vehicle, acquiring the temperature of each battery cell of the battery pack;

Judging whether the temperature of the power core exceeds the safe temperature, if so, controlling the starting of the liquid pump and regulating the output power of the liquid pump;

And determining branch pipelines where the over-temperature battery cells are located, and controlling electromagnetic valves of the corresponding branch pipelines to be opened until the temperature of the over-temperature battery cells is lower than the safe temperature.

13. The cooling control method of a power battery for a vehicle according to claim 12, wherein said step of "controlling the liquid pump to start and adjust the output power thereof" includes:

The battery management module feeds back the temperature of the battery core to the control unit, and the control unit dynamically adjusts the output power of the liquid pump in real time, so that the consistency of the cooling liquid flow rate at the liquid inlets at the two ends of the first direction X is ensured, and the volumes of the cooling liquid flowing through the surfaces at the two ends of the battery core in the same time are consistent.