Battery thermal management system, vehicle and control method of battery thermal management system

Abstract

The invention provides a battery thermal management system, a vehicle and a control method of the battery thermal management system, and belongs to the technical field of vehicle thermal management. The battery thermal management system comprises a battery module, a liquid cooling assembly and a driving assembly, the battery module is located on the liquid cooling assembly, and the driving assembly is connected with the liquid cooling assembly. The driving assembly comprises a first driving part and a second driving part, and when the temperature of the battery module is smaller than or equal to the preset temperature, the first driving part drives liquid to flow into the liquid cooling assembly to dissipate heat of the battery module. And when the temperature of the battery module is greater than the preset temperature, the first driving part pumps the liquid away from the liquid cooling assembly, and the second driving part pumps gas in the liquid cooling assembly, so that the interior of the liquid cooling assembly is in a vacuum state. Through the integrated driving assembly, heat insulation measures are rapidly started when a thermal runaway sign is detected, a heat propagation path is effectively blocked, and thermal runaway diffusion is prevented. In addition, the battery thermal management system monitors the temperature change in real time and takes measures, so that the safety and the reliability are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle thermal management technology, and in particular to a battery thermal management system, a vehicle, and a control method for the battery thermal management system. Background Art

[0002] In recent years, my country's automobile industry has developed rapidly, and the future development trend of the new energy automobile industry is still the core development industry. With the continuous development of science and technology and the continuous improvement of people's living standards, the performance requirements for new energy vehicles are also getting higher and higher.

[0003] Among them, power batteries, as the main core components of new energy vehicles, are of self-evident importance. In the actual use of vehicles, especially in high temperature environments, power batteries are more likely to accumulate heat, causing the overall temperature to rise. If the heat is not dissipated in time and quickly accumulates inside the battery, once it exceeds the critical value, the battery may leak, smoke, etc. In severe cases, it may cause thermal runaway or even explosion. Therefore, electric vehicles need a good thermal management system to control the temperature of the battery module. The thermal management system controls the temperature field of the battery system to make it work in the optimal temperature range, effectively improving the problem of power battery performance degradation and reducing safety risks.

[0004] However, in existing battery systems, the widespread use of fast charging technology has improved charging efficiency, but it has also brought about a sharp increase in the heat generated by the battery cells and an increased risk of thermal runaway. Although traditional liquid cooling plates have achieved battery cooling to a certain extent, the overall structural design still needs to be optimized, and after a single battery cell has thermal runaway, it is impossible to effectively block the heat transfer process, nor can it block and suppress the heat generated by a single thermal runaway battery cell. Summary of the invention

[0005] The present application provides a battery thermal management system, a vehicle, and a control method for the battery thermal management system. By integrating a drive component, the thermal insulation measures can be quickly activated when signs of thermal runaway are detected, effectively blocking the heat propagation path and preventing the further spread of thermal runaway. In addition, the battery thermal management system can monitor temperature changes in real time and take corresponding measures, significantly improving the overall safety and reliability of the battery thermal management system.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A first aspect of the present application provides a battery thermal management system, comprising:

[0008] Battery module;

[0009] A liquid cooling assembly, on which the battery module is located, and the liquid cooling assembly is used to improve the temperature of the battery module;

[0010] A driving component, the driving component is connected to the liquid cooling component, the driving component includes a first driving member and a second driving member, when the temperature of the battery module is less than or equal to a preset temperature, the first driving member drives liquid to flow into the liquid cooling component to keep the battery module within a normal temperature range;

[0011] When the temperature of the battery module is greater than a preset temperature, the first driving member draws liquid out of the liquid cooling assembly, and the second driving member draws gas inside the liquid cooling assembly to put the interior of the liquid cooling assembly in a vacuum state.

[0012] Based on the above technical solution, the present application can also be improved as follows.

[0013] In a possible implementation, the battery thermal management system further includes: a control unit;

[0014] The control unit is connected to the drive assembly;

[0015] The control unit is used to receive signals and control the start and stop of the first driving member and the second driving member according to the signals.

[0016] In a possible implementation, the battery thermal management system further includes: a first sensor and a second sensor;

[0017] The first sensor is electrically connected to the battery module, and the second sensor is connected to the liquid cooling assembly;

[0018] The first sensor is used to detect the temperature of the battery module in real time and transmit a signal to the control unit;

[0019] The second sensor is used to detect the vacuum degree inside the liquid cooling component in real time and transmit a signal to the control unit.

[0020] In one possible implementation, the liquid cooling assembly includes a liquid cooling bottom plate and a plurality of liquid cooling side plates;

[0021] A plurality of liquid cooling side plates are arranged on the liquid cooling bottom plate in parallel and at intervals, and each of the liquid cooling side plates is connected to the liquid cooling bottom plate.

[0022] In a possible implementation, the liquid cooling component further includes: a liquid inlet nozzle and a liquid outlet nozzle;

[0023] The liquid inlet nozzle is located on one of the liquid cooling side plates at the end, and the liquid outlet nozzle is located on one of the liquid cooling side plates at the other end;

[0024] The first driving member is connected to one of the liquid inlet nozzle and the liquid outlet nozzle, and the second driving member is connected to the other of the liquid inlet nozzle and the liquid outlet nozzle.

[0025] In a possible implementation, the battery module has a plurality of battery cell units;

[0026] A plurality of battery core units are arranged at intervals and in parallel on the liquid cooling bottom plate, and a plurality of battery core units and a plurality of liquid cooling side plates are arranged alternately.

[0027] In a possible implementation, the battery thermal management system further includes: a liquid storage device;

[0028] The liquid storage device is connected to the first driving member, and the first driving member pumps the liquid in the liquid cooling assembly into the liquid storage device to circulate the liquid.

[0029] In a possible implementation, the battery thermal management system further includes: a box body and a box cover;

[0030] The battery module and the liquid cooling assembly are both located in the box body, and the box cover is arranged on the box body.

[0031] A second aspect of the present application provides a vehicle, comprising the above-mentioned battery thermal management system.

[0032] A third aspect of the present application provides a control method for a battery thermal management system, which sends a control signal to a drive component, including:

[0033] According to the temperature value detected by the temperature sensor on the battery module, it is determined whether the temperature of the battery module is less than or equal to the preset temperature;

[0034] If the temperature of the battery module is less than or equal to the first preset temperature, a first signal is sent to the first driving member, and the first driving member drives the liquid to circulate in the liquid cooling assembly according to the first signal to meet the temperature increase requirement of the battery module;

[0035] If the temperature of the battery module is between the first preset temperature and the second preset temperature, a second signal is sent to the first driving member, and the first driving member drives the liquid to circulate in the liquid cooling assembly according to the second signal to meet the heat dissipation requirement;

[0036] If the temperature of the battery module is greater than the second preset temperature, a third signal is sent to the first driving component, and the first driving component extracts liquid from the liquid cooling component according to the third signal, and then sends a fourth signal to the second driving component, and the second driving component extracts gas inside the liquid cooling component according to the fourth signal to meet the vacuum requirement.

[0037] The present application provides a battery thermal management system, a vehicle and a control method for a battery thermal management system, wherein the battery thermal management system includes a battery module, a liquid cooling component and a drive component. The battery module is located on the liquid cooling component, and the liquid cooling component is used to improve the temperature of the battery module. The drive component is connected to the liquid cooling component, and the drive component includes a first drive component and a second drive component. When the temperature of the battery module is less than or equal to a preset temperature, the first drive component drives the liquid to flow into the liquid cooling component so that the battery module is within a normal temperature range. When the temperature of the battery module is greater than the preset temperature, the first drive component extracts the liquid from the liquid cooling component, and the second drive component extracts the gas inside the liquid cooling component so that the inside of the liquid cooling component is in a vacuum state. The vehicle includes the above-mentioned battery thermal management system. The control method of the battery thermal management system includes: judging whether the temperature of the battery module is less than or equal to the preset temperature according to the temperature value detected by the temperature sensor on the battery module; if the temperature of the battery module is less than or equal to the first preset temperature, sending a first signal to the first driver, and the first driver drives the liquid to circulate in the liquid cooling component according to the first signal to meet the heating demand of the battery module; if the temperature of the battery module is between the first preset temperature and the second preset temperature, sending a second signal to the first driver, and the first driver drives the liquid to circulate in the liquid cooling component according to the second signal to meet the heat dissipation demand; if the temperature of the battery module is greater than the second preset temperature, sending a third signal to the first driver, and the first driver extracts the liquid from the liquid cooling component according to the third signal, and then sending a fourth signal to the second driver, and the second driver extracts the gas inside the liquid cooling component according to the fourth signal to meet the vacuum demand. In this way, the present application can quickly start the insulation measures when the signs of thermal runaway are detected by integrating the drive component, effectively blocking the heat propagation path, and preventing the further spread of thermal runaway. In addition, the battery thermal management system can monitor temperature changes in real time and take corresponding measures, which significantly improves the overall safety and reliability of the battery thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic diagram of a battery thermal management system according to an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a liquid cooling component of a battery thermal management system provided in one embodiment of the present application;

[0041] Figure 3A schematic diagram of the structure of a liquid-cooled side plate of a battery thermal management system provided in one embodiment of the present application;

[0042] Figure 4 A top view of a battery thermal management system provided in one embodiment of the present application;

[0043] Figure 5 A flowchart of a control method for a battery thermal management system provided in one embodiment of the present application.

[0044] Description of reference numerals:

[0045] 100-Battery thermal management system;

[0046] 200-battery module;

[0047] 210-battery cell unit;

[0048] 300-Liquid cooling assembly;

[0049] 310-liquid cooling bottom plate; 320-liquid cooling side plate; 321-liquid inlet; 322-liquid outlet; 330-liquid inlet nozzle; 340-liquid outlet nozzle;

[0050] 400-drive assembly;

[0051] 410-first driving member; 420-second driving member;

[0052] 500-control unit;

[0053] 600 - first sensor;

[0054] 700 - second sensor;

[0055] 800-liquid storage device;

[0056] 810-Liquid. DETAILED DESCRIPTION

[0057] As described in the background technology, in existing battery systems, the widespread use of fast charging technology has improved charging efficiency, but it has also brought about a sharp increase in the heat generated by the battery cells and an increased risk of thermal runaway. Although traditional liquid cooling plates have achieved battery cooling to a certain extent, the overall structural design still needs to be optimized, and after a single battery cell has thermal runaway, it is impossible to effectively block the heat transfer process, nor can it block and suppress the heat generated by a single thermal runaway battery cell.

[0058] In response to the above technical problems, an embodiment of the present application provides a battery thermal management system, a vehicle and a control method for a battery thermal management system, wherein the battery thermal management system includes a battery module, a liquid cooling assembly and a drive assembly. Among them, the battery module is located on the liquid cooling assembly, and the liquid cooling assembly is used to improve the temperature of the battery module. The drive assembly is connected to the liquid cooling assembly, and the drive assembly includes a first drive member and a second drive member. When the temperature of the battery module is less than or equal to a preset temperature, the first drive member drives the liquid to flow into the liquid cooling assembly to keep the battery module within a normal temperature range. When the temperature of the battery module is greater than the preset temperature, the first drive member extracts the liquid from the liquid cooling assembly, and the second drive member extracts the gas inside the liquid cooling assembly to keep the inside of the liquid cooling assembly in a vacuum state. The vehicle includes the above-mentioned battery thermal management system. The control method of the battery thermal management system includes: judging whether the temperature of the battery module is less than or equal to the preset temperature according to the temperature value detected by the temperature sensor on the battery module; if the temperature of the battery module is less than or equal to the first preset temperature, sending a first signal to the first driver, and the first driver drives the liquid to circulate in the liquid cooling component according to the first signal to meet the heating demand of the battery module; if the temperature of the battery module is between the first preset temperature and the second preset temperature, sending a second signal to the first driver, and the first driver drives the liquid to circulate in the liquid cooling component according to the second signal to meet the heat dissipation demand; if the temperature of the battery module is greater than the second preset temperature, sending a third signal to the first driver, and the first driver extracts the liquid from the liquid cooling component according to the third signal, and then sending a fourth signal to the second driver, and the second driver extracts the gas inside the liquid cooling component according to the fourth signal to meet the vacuum demand. In this way, the present application can quickly start the insulation measures when the signs of thermal runaway are detected by integrating the drive component, effectively blocking the heat propagation path, and preventing the further spread of thermal runaway. In addition, the battery thermal management system can monitor temperature changes in real time and take corresponding measures, which significantly improves the overall safety and reliability of the battery thermal management system.

[0059] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0060] The embodiments of the present application provide a battery thermal management system, a vehicle, and a control method for a battery thermal management system. By integrating a drive component, it is possible to quickly initiate thermal insulation measures when signs of thermal runaway are detected, effectively blocking the heat propagation path, and preventing further spread of thermal runaway. In addition, the battery thermal management system can monitor temperature changes in real time and take corresponding measures, significantly improving the overall safety and reliability of the battery thermal management system. The specific structure of the battery thermal management system, the vehicle, and the control method for the battery thermal management system provided in the embodiments of the present application is introduced below in conjunction with the accompanying drawings.

[0061] refer to Figure 1 In a first aspect, an embodiment of the present application provides a battery thermal management system 100, which may include a battery module 200, a liquid cooling component 300, and a drive component 400. The battery module 200 may be located on the liquid cooling component 300, so that the liquid cooling component 300 can be used to dissipate heat from the battery module 200. The drive component 400 may be connected to the liquid cooling component 300, and the drive component 400 may transport liquid 810 into the liquid cooling component 300, so that the liquid 810 in the liquid cooling component 300 can improve the temperature of the battery module 200. In a possible implementation, the drive component 400 may include a first drive member 410 and a second drive member 420, and the first drive member 410 and the second drive member 420 may be connected to the liquid cooling component 300, respectively.

[0062] In the embodiment of the present application, the temperature threshold of the battery module 200 can be pre-set in the battery thermal management system 100. In this way, when the temperature of the battery module 200 is less than or equal to the preset temperature, the battery module 200 is in a controllable operating temperature range, and the first driving member 410 can drive the liquid 810 to flow into the liquid cooling assembly 300 to achieve the circulation of the liquid 810, so that the battery module 200 is at a normal temperature. When the temperature of the battery module 200 is greater than the preset temperature, that is, the battery module 200 has a thermal runaway phenomenon, the first driving member 410 at this time first extracts the liquid 810 from the liquid cooling assembly 300, and then extracts the gas inside the liquid cooling assembly 300 through the second driving member 420, so that the inside of the liquid cooling assembly 300 is in a vacuum state, and the liquid cooling assembly 300 forms an insulation layer, so that the battery module 200 with thermal runaway phenomenon is in a thermally insulated space, which suppresses the occurrence of heat diffusion.

[0063] On the basis of the above embodiments, in one possible implementation, when the battery module 200 works in a relatively low temperature environment, it is easy for the battery module 200 to lose temperature due to its own low temperature. The first driving member 410 drives the liquid 810 to flow into the liquid cooling assembly 300, and the liquid 810 at this time is a relatively high temperature liquid 810, thereby heating the battery module 200 so that the temperature of the battery module 200 rises to within the normal temperature range. In another possible implementation, after the battery module 200 has worked for a period of time, it is easy for the temperature of the battery module 200 to exceed the normal temperature range. The first driving member 410 drives the liquid 810 to flow into the liquid cooling assembly 300, and the liquid 810 at this time is a relatively low temperature liquid 810, thereby dissipating the heat of the battery module 200 so that the temperature of the battery module 200 drops to within the normal temperature range.

[0064] Continue to refer Figure 1 , based on the above embodiment, the battery thermal management system 100 may further include: a control unit 500. The control unit 500 may be electrically connected to the drive assembly 400, so that the control unit 500 can control the drive assembly 400 to drive. In a possible implementation, the control unit 500 may be used to receive a signal and control the start and stop of the first drive member 410 and the second drive member 420 according to the signal. It is understandable that the control unit 500 can control the start and stop of the first drive member 410 and the second drive member 420 according to different signals.

[0065] Continue to refer Figure 1 On the basis of the above embodiment, the battery thermal management system 100 may further include: a first sensor 600 and a second sensor 700. Among them, the first sensor 600 is electrically connected to the battery module 200, and the second sensor 700 is connected to the liquid cooling component 300. In the embodiment of the present application, the first sensor 600 can be used to detect the temperature of the battery module 200 in real time and transmit the temperature signal to the control unit 500. The second sensor 700 can be used to detect the vacuum degree inside the liquid cooling component 300 in real time and transmit the vacuum degree signal to the control unit 500. In a possible implementation, the first sensor 600 can be a temperature sensor, and the second sensor 700 can be a vacuum sensor. In this way, the temperature sensor can detect the temperature of the battery module 200 in real time and transmit the signal to the control unit 500 in real time. The control unit 500 can receive the signal of the temperature sensor and compare it with the preset temperature, and then control the drive component 400 accordingly. Accordingly, the vacuum sensor can detect the vacuum degree inside the liquid cooling component 300 in real time and transmit the signal to the control unit 500 in real time. The control unit 500 can determine whether the liquid cooling component 300 is in a vacuum state after receiving the signal from the vacuum sensor.

[0066] refer to Figure 2 as well as Figure 3 On the basis of the above embodiment, the liquid cooling assembly 300 may further include a liquid cooling bottom plate 310 and a liquid cooling side plate 320. Among them, in a possible implementation, the number of liquid cooling side plates 320 may be several, and the embodiment of the present application does not limit the number of liquid cooling side plates 320. In the embodiment of the present application, several liquid cooling side plates 320 may be arranged on the liquid cooling bottom plate 310 at intervals and in parallel, and each liquid cooling side plate 320 may be connected to the liquid cooling bottom plate 310. In a possible implementation, each liquid cooling side plate 320 may be perpendicular to the liquid cooling bottom plate 310, and there is a certain space between two adjacent liquid cooling side plates 320 for the battery module 200 to be inserted, so that the battery module 200 is heated or dissipated through the liquid cooling side plate 320 and the liquid cooling bottom plate 310.

[0067] Continue to refer Figure 2 On the basis of the above embodiment, the liquid cooling component 300 may further include: a liquid inlet nozzle 330 and a liquid outlet nozzle 340. Among them, the liquid inlet nozzle 330 may be located on one of the liquid cooling side plates 320 at the end, and the liquid outlet nozzle 340 may be located on one of the liquid cooling side plates 320 at the other end. In a possible implementation, the liquid inlet nozzle 330 and the liquid outlet nozzle 340 may be located on the liquid cooling side plates 320 at both ends, respectively. The liquid inlet nozzle 330 may be located on the outermost liquid cooling side plate 320 at one of the ends, and the liquid outlet nozzle 340 may be located on the outermost liquid cooling side plate 320 at the other end. Of course, in some other embodiments, the liquid inlet nozzle 330 and the liquid outlet nozzle 340 may also be located at other positions of the liquid cooling side plate 320, and the embodiment of the present application is not limited here. It can be understood that the liquid cooling side plate 320 is respectively provided with a liquid inlet 321 and a liquid outlet 322. Among them, the liquid inlet nozzle 330 corresponds to the liquid inlet 321, and the liquid outlet nozzle 340 corresponds to the liquid outlet 322. Therefore, the liquid inlet nozzle 330 is connected to the liquid inlet 321, and the liquid outlet nozzle 340 is connected to the liquid outlet 322, so that the liquid inlet nozzle 330 and the liquid outlet nozzle 340 are both connected to the liquid-cooled side plate 320 and the liquid-cooled bottom plate 310. In this way, the liquid 810 can be injected from the liquid inlet nozzle 330, enter the liquid-cooled side plate 320 through the liquid inlet 321, and then flow inside the entire liquid-cooled side plate 320 and the liquid-cooled bottom plate 310, so as to heat up or dissipate heat for the battery module 200, and then flow out of the liquid cooling component 300 through the liquid outlet 322 and the liquid outlet nozzle 340, so as to realize the circulation of the liquid 810.

[0068] refer to Figure 1 as well as Figure 2, based on the above embodiment, the first driving member 410 can be connected to one of the liquid inlet nozzle 330 and the liquid outlet nozzle 340, and the second driving member 420 can be connected to the other of the liquid inlet nozzle 330 and the liquid outlet nozzle 340. In a possible implementation, the first driving member 410 can be connected to the liquid inlet nozzle 330, and the second driving member 420 can be connected to the liquid outlet nozzle 340. The first driving member 410 can drive the liquid 810 to be transported to the liquid cooling component 300 through the liquid inlet nozzle 330, and the first driving member 410 can also extract the liquid 810 in the liquid cooling component 300 from the liquid cooling component 300 through the liquid inlet nozzle 330. The second driving member 420 can extract the gas inside the liquid cooling component 300 through the liquid outlet nozzle 340. Of course, in some other embodiments, the first driving member 410 can be connected to the liquid outlet nozzle 340, and the second driving member 420 can be connected to the liquid inlet nozzle 330. This application is not limited here.

[0069] refer to Figure 4 On the basis of the above embodiment, the battery module 200 may have a plurality of battery cell units 210. Among them, the number of battery cell units 210 may be a plurality, and the embodiment of the present application does not limit the number of liquid-cooled side plates 320. In the embodiment of the present application, a plurality of battery cell units 210 may be arranged on the liquid-cooled bottom plate 310 in an interval and in parallel. It is understandable that a plurality of battery cell units 210 and a plurality of liquid-cooled side plates 320 may be arranged alternately on the liquid-cooled bottom plate 310. In this way, the liquid-cooled side plates 320 may contact the battery cell units 210, and every two liquid-cooled side plates 320 may be respectively attached to the two side surfaces of the battery cell units 210, and the liquid-cooled bottom plate 310 may be attached to the bottom surface of the battery cell units 210, so that the liquid-cooled side surfaces and the liquid-cooled bottom plate 310 can fully heat up or dissipate heat for the battery cell units 210.

[0070] Continue to refer Figure 1 On the basis of the above embodiment, the battery thermal management system 100 may further include: a liquid storage device 800. The liquid storage device 800 is connected to the first driving member 410. It is understandable that the first driving member 410 can transport the liquid 810 in the liquid storage device 800 to the liquid cooling assembly 300 under the control of the control unit 500, so that the liquid 810 in the liquid cooling assembly 300 heats the battery module 200 by liquid heat or dissipates heat by liquid cooling. When the battery module 200 has thermal runaway, the first driving member 410 can pump the liquid 810 in the liquid cooling assembly 300 to the liquid storage device 800 under the control of the control unit 500, so that the liquid 810 can be stored and then recycled.

[0071] On the basis of the above embodiment, the battery thermal management system 100 may further include: a box body and a box cover (not shown in the figure). Among them, in a possible implementation, the box body may be a rectangular structure, and the embodiment of the present application does not limit the shape of the box body. In the embodiment of the present application, the battery module 200 and the liquid cooling assembly 300 may both be located in the box body, and the box cover may be covered on the box body. In this way, the box body and the box cover can form a whole, thereby supporting the battery module 200 and the liquid cooling assembly 300, and having a good protective effect.

[0072] On the basis of the above embodiments, in one possible implementation, the first driving member 410 may be a hydraulic pump, and the second driving member 420 may be a vacuum pump. The liquid 810 may be a liquid such as ethylene glycol that can effectively dissipate heat. The multiple sides of the liquid-cooled side plate 320 that are not in contact with the battery cell unit 210 may be made of non-metallic materials, which have good thermal insulation properties. Exemplarily, the liquid 810 may be ethylene glycol, and the sides of the liquid-cooled side plate 320 may be made of ceramics, which is not limited in this application.

[0073] The second aspect of the present application provides a vehicle (not shown in the figure). The vehicle may include the battery thermal management system 100 described above.

[0074] Based on the above-mentioned battery thermal management system 100 and the structure of the vehicle, a third aspect of the embodiment of the present invention provides a control method of the battery thermal management system 100. Figure 5 The control method may include sending a control signal to the driving component 400, judging whether the temperature of the battery module 200 is less than or equal to a preset temperature based on the temperature value detected by the temperature sensor on the battery module 200, and sending a temperature signal to the control unit 500 so that the control unit 500 transmits instructions to the driving component 400 according to the temperature signal.

[0075] Figure 5 A flow chart of a control method of a battery thermal management system 100 provided in an embodiment of the present application, referring to Figure 5 As shown, a control method of a battery thermal management system 100 provided in an embodiment of the present application includes:

[0076] S501 , judging whether the temperature of the battery module 200 is less than or equal to a preset temperature according to the temperature value detected by the temperature sensor on the battery module 200 .

[0077] In the embodiment of the present application, the battery thermal management system 100 pre-sets the temperature threshold of the battery module 200. The temperature state of the battery module 200 is obtained in real time through the temperature sensor in the battery thermal management system 100, and it is determined whether the temperature of the battery module 200 is less than or equal to the preset temperature according to the temperature value detected by the temperature sensor on the battery module 200. If the temperature of the battery module 200 is greater than the preset temperature, the battery module 200 has thermal runaway.

[0078] S502 , if the temperature of the battery module 200 is less than or equal to the first preset temperature, a first signal is sent to the first driving member 410 , and the first driving member 410 drives the liquid 810 to circulate in the liquid cooling assembly 300 according to the first signal to meet the temperature increase requirement of the battery module 200 .

[0079] In the embodiment of the present application, when the temperature of the battery module 200 is less than or equal to the first preset temperature, the control unit 500 determines that the battery module 200 is in a hypothermic state according to the temperature signal. The control unit 500 transmits the first signal to the first driving member 410, so that the first driving member 410 drives the liquid 810 in the liquid storage device 800 to flow along the liquid inlet nozzle 330 to the liquid cooling assembly 300 according to the first signal, and then flows back to the liquid storage device 800 through the liquid outlet nozzle 340, so as to realize the circulation of the liquid 810.

[0080] S503. If the temperature of the battery module 200 is between the first preset temperature and the second preset temperature, a second signal is sent to the first driving member 410. The first driving member 410 drives the liquid 810 to circulate in the liquid cooling assembly 300 according to the second signal to meet the heat dissipation requirement.

[0081] In the embodiment of the present application, when the temperature of the battery module 200 is between the first preset temperature and the second preset temperature, the control unit 500 determines that the battery module 200 is within a controllable operating temperature range according to the temperature signal. The control unit 500 transmits the first signal to the first driving member 410, so that the first driving member 410 drives the liquid 810 in the liquid storage device 800 to flow along the liquid inlet nozzle 330 to the liquid cooling assembly 300 according to the first signal, and then flows back to the liquid storage device 800 through the liquid outlet nozzle 340, so as to realize the circulation of the liquid 810.

[0082] S504. If the temperature of the battery module 200 is greater than the second preset temperature, a third signal is sent to the first driving member 410. The first driving member 410 extracts the liquid 810 from the liquid cooling component 300 according to the second signal, and then sends a fourth signal to the second driving member 420. The second driving member 420 extracts the gas inside the liquid cooling component 300 according to the fourth signal to meet the vacuum requirement.

[0083] In the embodiment of the present application, when the temperature of the battery module 200 is greater than the second preset temperature, the control unit 500 determines that thermal runaway has occurred in the battery module 200 according to the temperature signal. The control unit 500 transmits the third signal to the first driving member 410, so that the first driving member 410 drives the liquid 810 inside the liquid cooling assembly 300 to be pumped from the liquid cooling assembly 300 to the liquid storage device 800 according to the third signal, and there is no liquid 810 in the liquid cooling assembly 300. The control unit 500 then transmits the fourth signal to the second driving member 420, so that the second driving member 420 extracts the gas inside the liquid cooling assembly 300 from the liquid cooling assembly 300 according to the fourth signal, so that the liquid cooling assembly 300 is in a vacuum state.

[0084] In the embodiment of the present application, by integrating the drive assembly 400, it is possible to quickly start the heat insulation measures when the signs of thermal runaway are detected, effectively block the heat propagation path, and prevent the further spread of thermal runaway. In addition, the battery thermal management system 100 can monitor the temperature changes in real time and take corresponding measures, which significantly improves the overall safety and reliability of the battery thermal management system 100.

[0085] In the embodiment of the present application, compared with the liquid cooling plate in the related art, the control unit 500 in the embodiment of the present application cooperates with the sensor and the drive assembly 400, so that the battery thermal management system 100 can monitor the temperature change in real time and take corresponding measures, which significantly improves the overall safety and reliability of the battery thermal management system 100. In addition, the liquid cooling assembly 300 forms an insulation layer to replace the insulation gasket in the related art, reducing the battery module 200's reliance on additional protective materials, making the battery structure provided by the embodiment of the present application more concise and compact, and improving the energy density and overall performance.

[0086] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0087] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0088] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0089] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0090] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery thermal management system, characterized in that: include: Battery module; A liquid cooling assembly, on which the battery module is located, and the liquid cooling assembly is used to improve the temperature of the battery module; A driving component, the driving component is connected to the liquid cooling component, the driving component includes a first driving member and a second driving member, when the temperature of the battery module is less than or equal to a preset temperature, the first driving member drives liquid to flow into the liquid cooling component to keep the battery module within a normal temperature range; When the temperature of the battery module is greater than a preset temperature, the first driving member draws the liquid out of the liquid cooling assembly, and the second driving member draws gas from the inside of the liquid cooling assembly to place the inside of the liquid cooling assembly in a vacuum state.

2. The battery thermal management system according to claim 1, characterized in that: The battery thermal management system further includes: a control unit; The control unit is connected to the driving assembly; The control unit is used to receive a signal and control the start and stop of the first driving member and the second driving member according to the signal.

3. The battery thermal management system according to claim 2, characterized in that: The battery thermal management system further includes: a first sensor and a second sensor; The first sensor is electrically connected to the battery module, and the second sensor is connected to the liquid cooling assembly; The first sensor is used to detect the temperature of the battery module in real time and transmit a signal to the control unit; The second sensor is used to detect the vacuum degree inside the liquid cooling component in real time and transmit a signal to the control unit.

4. The battery thermal management system according to claim 1, characterized in that: The liquid cooling assembly includes a liquid cooling bottom plate and a plurality of liquid cooling side plates; A plurality of the liquid-cooling side plates are arranged on the liquid-cooling bottom plate in parallel and at intervals, and each of the liquid-cooling side plates is connected to the liquid-cooling bottom plate.

5. The battery thermal management system according to claim 4, characterized in that: The liquid cooling assembly further comprises: a liquid inlet nozzle and a liquid outlet nozzle; The liquid inlet nozzle is located on one of the liquid-cooled side plates at the end, and the liquid outlet nozzle is located on one of the liquid-cooled side plates at the other end; The first driving member is connected to one of the liquid inlet nozzle and the liquid outlet nozzle, and the second driving member is connected to the other of the liquid inlet nozzle and the liquid outlet nozzle.

6. The battery thermal management system according to claim 4, characterized in that: The battery module has a plurality of battery cell units; A plurality of the battery core units are arranged on the liquid-cooling bottom plate in a spaced-apart and parallel manner, and a plurality of the battery core units and a plurality of the liquid-cooling side plates are arranged alternately.

7. The battery thermal management system according to any one of claims 1 to 6, characterized in that: The battery thermal management system further includes: a liquid storage device; The liquid storage device is connected to the first driving member, and the first driving member pumps the liquid in the liquid cooling component into the liquid storage device to circulate the liquid.

8. The battery thermal management system according to any one of claims 1 to 6, characterized in that: The battery thermal management system further includes: a box body and a box cover; The battery module and the liquid cooling assembly are both located in the box body, and the box cover is disposed on the box body.

9. A vehicle, characterized in that: A battery thermal management system comprising any one of claims 1 to 8.

10. A control method for a battery thermal management system, characterized in that: Send control signals to the drive components, including: According to the temperature value detected by the temperature sensor on the battery module, it is determined whether the temperature of the battery module is less than or equal to the preset temperature; If the temperature of the battery module is less than or equal to the first preset temperature, a first signal is sent to the first driving member, and the first driving member drives the liquid to circulate in the liquid cooling assembly according to the first signal to meet the temperature increase requirement of the battery module; If the temperature of the battery module is between the first preset temperature and the second preset temperature, a second signal is sent to the first driving member, and the first driving member drives the liquid to circulate in the liquid cooling assembly according to the second signal to meet the heat dissipation requirement; If the temperature of the battery module is greater than the second preset temperature, a third signal is sent to the first driving component, and the first driving component extracts liquid from the liquid cooling component according to the third signal, and then sends a fourth signal to the second driving component, and the second driving component extracts gas inside the liquid cooling component according to the fourth signal to meet the vacuum requirement.

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