CN117936983A - Temperature control system of battery module and battery module - Google Patents
Temperature control system of battery module and battery module Download PDFInfo
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- CN117936983A CN117936983A CN202410127895.9A CN202410127895A CN117936983A CN 117936983 A CN117936983 A CN 117936983A CN 202410127895 A CN202410127895 A CN 202410127895A CN 117936983 A CN117936983 A CN 117936983A
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- 238000002791 soaking Methods 0.000 claims abstract description 153
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 230000017525 heat dissipation Effects 0.000 claims abstract description 39
- 238000005452 bending Methods 0.000 claims description 53
- 238000001816 cooling Methods 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 13
- 239000004519 grease Substances 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 12
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000004806 packaging method and process Methods 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a temperature control system of a battery module and the battery module, comprising a heat conducting plate, wherein the heat conducting plate is contacted with adjacent single batteries so as to conduct heat between the heat conducting plate and the adjacent single batteries; the soaking plates are connected with the heat conducting plates and are used for soaking the heat conducting plates; the heat dissipation assembly comprises a liquid cooler and an air cooler; the controller is used for controlling the liquid cooler or the air cooler to independently radiate heat of the soaking plate when the temperature of the soaking plate detected by the temperature sensor is larger than a first set temperature and smaller than a second set temperature; the controller is also used for controlling the liquid cooler and the air cooler to jointly radiate heat to the soaking plate when the temperature of the soaking plate detected by the temperature sensor is larger than a second set temperature. In the scheme, soaking of a plurality of single batteries is realized through the heat conducting plate and the soaking plate, the problems of overcharge and overdischarge of part of single batteries in the use process are reduced, the consistency of the single batteries is improved, the quality of a battery module is improved, and the service life is prolonged.
Description
The application is as follows: 2022, 12 months and 20 days, application number is: 202211642362.1, the name of the application is: a battery module and a temperature regulation method thereof are disclosed.
Technical Field
The application relates to the technical field of batteries, in particular to a temperature control system of a battery module and the battery module.
Background
The battery module generates heat in the charging and discharging process, the battery module is generally formed by assembling a plurality of single batteries, and in the charging and discharging process, the plurality of single batteries in the same battery module generate heat in the charging and discharging process due to various factors such as circuit connection positions, self-property differences of the single batteries and the like, so that the temperatures of the plurality of single batteries in the module are different; under the condition that the existing battery module dissipates heat through the radiator, different parts of the module are cooled, and the temperature of the single batteries at different positions still has difference.
Under the effect of different temperatures, especially along with the extension of live time, different temperatures act on a plurality of battery cells and make the ageing of the self nature of a plurality of battery cells take place different degree for follow-up in the in-process battery module's of use a plurality of battery cells's the process of charging and discharging has the difference, is difficult to realize a plurality of battery cells's synchronization, makes partial battery appear overcharging, the problem of overdischarging, causes battery module's life to reduce, has increased the potential safety hazard.
Disclosure of Invention
The application provides a temperature control system of a battery module and the battery module, which are used for reducing property differentiation of a plurality of single batteries in the battery module under the action of different temperatures, ensuring the synchronism of state changes of the plurality of single batteries, prolonging the service life of equipment and improving the safety.
In a first aspect, the present application provides a temperature control system of a battery module, comprising:
the heat conducting plate is contacted with the adjacent single batteries through the flexible heat conducting layer so as to conduct heat between the heat conducting plate and the adjacent single batteries;
the soaking plates are connected with the heat conducting plates and used for soaking the heat conducting plates;
The heat dissipation assembly comprises a liquid cooler and an air cooler;
The controller is used for controlling the liquid cooler or the air cooler to independently radiate heat of the soaking plate when the temperature of the soaking plate detected by the temperature sensor is larger than a first set temperature and smaller than a second set temperature; and the controller is also used for controlling the liquid cooler and the air cooler to jointly radiate heat of the soaking plate when the temperature of the soaking plate detected by the temperature sensor is greater than a second set temperature.
As an achievable mode, the temperature control system of the battery module further includes:
The timer is used for detecting the working time of the liquid cooler or the independent heat dissipation of the air cooler, and the controller is also used for controlling the liquid cooler and the air cooler to jointly dissipate heat of the soaking plate when the detected working time is longer than a set time length and the temperature of the soaking plate is still longer than a first set temperature.
As an realizable mode, the heat conducting plate is provided with a bending part;
the vapor chamber is provided with a through hole matched with the bending part;
The bending part penetrates through the through hole, the bending part of the bending part is attached to one surface of the vapor chamber, which is away from the heat conducting plate, and the bending parts of the adjacent bending parts are not overlapped.
As an implementation manner, an avoidance groove for accommodating the bending part of the bending part is formed in one side, away from the single battery, of the soaking plate, so that one side, away from the single battery, of the bending part is flush with one side, away from the single battery, of the soaking plate.
As an implementation manner, the air cooler is positioned at one side of the liquid cooler away from the vapor chamber;
the heat dissipation assembly is arranged on one side of the soaking plate, which is away from the single battery.
As an implementation manner, the number of the temperature sensors is two, the two temperature sensors are arranged along the arrangement direction of the plurality of single batteries, and the distance from each temperature sensor to the end part of the soaking plate close to the temperature sensor is 1/4-1/3 of the length of the soaking plate.
As an implementation manner, the liquid cooler comprises a liquid cooling block, and a liquid inlet and a liquid outlet are formed in the liquid cooling block;
The air cooler comprises fins and/or heat pipes arranged on the liquid cooling block, and the air cooler is cooled by a fan and/or naturally cooled.
As an implementation manner, the heat conducting plates are arranged on two sides of two largest side surfaces, which are opposite to each single battery.
As an implementation manner, two soaking plates are provided, the two soaking plates are respectively located at two sides of the plurality of single batteries, and two ends of each heat conducting plate are respectively connected with the soaking plates at corresponding sides.
As an realizable mode, a heat conducting material is arranged between the bending part of the bending part and the soaking plate, and/or,
A heat conducting material is arranged between the heat radiating component and the soaking plate;
The heat conducting material is at least one of phase change heat conducting material, heat conducting pad, heat conducting adhesive tape, heat conducting rubber, heat conducting pouring sealant and heat conducting silicone grease.
In a second aspect, the present application provides a battery module comprising: a plurality of single batteries and the temperature control system.
In the scheme, soaking of a plurality of single batteries is realized through the heat conducting plate and the soaking plate, the problems of overcharge and overdischarge of part of single batteries in the use process are reduced, the consistency of the single batteries is improved, the quality of a battery module is improved, and the service life is prolonged.
Drawings
Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a heat conducting plate and a flexible heat conducting layer according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a heat-conducting plate according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a connection structure between a heat conducting plate and a vapor chamber according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a heat dissipating assembly according to an embodiment of the present application;
FIG. 6 is an enlarged schematic view of portion A of FIG. 1 according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a temperature control principle according to an embodiment of the present application;
fig. 8 is a schematic diagram of a temperature regulation method of a battery module according to an embodiment of the application.
1. A single battery; 2. packaging the shell; 3. a heat conductive plate; 31. a flexible thermally conductive layer; 32. a bending part; 4. a soaking plate; 41. a through hole; 42. an avoidance groove; 5. a heat dissipation assembly; 51. a liquid cooler; 511. a liquid cooling block; 512. a liquid inlet; 513. a liquid outlet; 52. an air cooler; 6. a temperature sensor; 7. a controller; 8. a timer.
Detailed Description
The application is further described in detail below by means of the figures and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.
In order to facilitate understanding of the battery module provided by the application, an application scenario of the battery module is first described. The battery module provided by the embodiment of the application comprises a plurality of single batteries, wherein the single batteries are connected and packaged into a whole through a shell to serve as an energy supply unit; in addition, the heat dissipation module is also arranged for dissipating heat generated in the use process of the single battery. However, the heat dissipation capacity of the plurality of single batteries in the battery module is different, so that the temperatures of different parts of the battery module are different, the plurality of single batteries are at different temperatures for a long time, the aging degree of the different single batteries is different, synchronous change of the plurality of single batteries is difficult to realize, the charging and discharging processes of the plurality of single batteries in the battery module are different in the subsequent use process, the problems of overcharge and overdischarge of part of batteries are caused, the service life of the battery module is reduced, and the potential safety hazard is increased. Therefore, the embodiment of the application provides the battery module, so that the consistency of a plurality of single batteries is improved, the quality of the battery module is improved, the service life is prolonged, and the safety can be improved. The battery module will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 illustrates a schematic structure of a battery module. The battery module comprises a plurality of single batteries 1 and a packaging shell 2, wherein the single batteries 1 are arranged at intervals along a set direction and are connected through a circuit; the packaging shell 2 is composed of a plurality of side plates, the side plates are arranged among the plurality of single batteries 1 in a surrounding mode, and the side plates are fixedly connected to realize packaging of the plurality of single batteries 1.
The specific structure and the packaging mode of the packaging shell 2 can be selected and adaptively adjusted according to the arrangement form of the single batteries 1, and the embodiment of the application does not describe the packaging shell 2 again.
The battery module further comprises a plurality of heat conducting plates 3 and two soaking plates 4; the plurality of heat conducting plates 3 are respectively clamped between two adjacent single batteries 1, and the heat conducting plates 3 are correspondingly arranged on one sides, facing the outside, of the two single batteries 1 at the two ends, and each heat conducting plate 3 is contacted with the largest side surface of the adjacent single battery 1, so that each heat conducting plate 3 and the adjacent single battery 1 can generate heat conduction, namely, the heat generated by each single battery 1 in the charging and discharging processes is transferred to the heat conducting plate 3.
The two soaking plates 4 are arranged on two opposite sides of the plurality of single batteries 1 in a one-to-one correspondence manner, and two opposite sides of each heat conducting plate 3 are connected to the two soaking plates 4 in a one-to-one correspondence manner, so that heat conduction between each heat conducting plate 3 and the two soaking plates 4 is realized.
The heat on the heat conducting plate 3 is conducted to the soaking plate 4, and the heat on the soaking plate 4 is conducted from a position with higher temperature to a position with lower temperature, and is conducted to the heat conducting plate 3 and the single battery 1 at the corresponding position with lower temperature. In this way, the heat transfer channels among the plurality of heat conducting plates 3 are formed through the vapor chamber 4, and the heat on the heat conducting plate 3 with higher temperature is transferred to the heat conducting plate 3 with lower temperature through the vapor chamber 4, so that the temperatures of the heat conducting plates 3 with different temperatures tend to be the same, namely the temperatures of the plurality of single batteries 1 tend to be the same.
During the operation of the single battery 1, the single battery 1 generates heat to raise the temperature, and the heat of the single battery 1 is conducted to the adjacent heat conducting plate 3; because the heat generated by the single batteries 1 at different positions is different, the temperatures of different heat conducting plates 3 are different, and the heat of the heat conducting plates 3 is respectively transferred to the soaking plates 4, so that each part connected with the heat conducting plates 3 on the soaking plates 4 gradually tends to have the same temperature as the corresponding heat conducting plates 3, and the heat on the soaking plates 4 is transferred from a region with high temperature to a region with low temperature and is transferred to the heat conducting plates 3 with lower temperature; meanwhile, the temperature of the unit cells 1 and the adjacent heat conductive plates 3 tends to be the same by heat conduction.
Finally, through the heat conduction of the heat conduction plate 3 and the soaking of the soaking plate 4, the single batteries 1 at different positions have different heat generated by themselves, but the heat conduction is realized through the heat conduction plate 3 and the soaking plate 4, so that the temperatures of the single batteries 1 tend to be the same; along with the extension of the service time, the property changes of a plurality of single batteries 1 tend to be synchronous, the process of charging and discharging is kept synchronous, the problems of overcharge and overdischarge of part of single batteries 1 are reduced, the quality of the battery module is improved, the service life is prolonged, and the use safety is higher.
It should be noted that, for the number of the heat conductive plates 3, the number of the heat conductive plates 3 may be comprehensively considered according to practical situations, such as the type of the unit battery 1, the heating value of the unit battery 1, the heat conductivity coefficient of the heat conductive plates 3, and the like. Two or three single cells 1 at each interval are provided with a heat conducting plate 3, and the quantity of the single cells 1 at the interval between two adjacent heat conducting plates 3 is adjusted according to actual conditions, so that the heat of the single cells 1 can be transferred to the soaking plate 4 through the heat conducting plates 3.
Similarly, the soaking plate 4 may be provided as one, the soaking plate 4 is located at one side of the plurality of single batteries 1 and connected with the plurality of heat conducting plates 3, and heat conduction between the heat conducting plates 3 and the single batteries 1 at different positions is realized through one soaking plate 4. In the embodiment of the application, only two soaking plates 4 are provided, and each two adjacent heat conducting plates 3 are arranged at intervals by one single battery 1.
Referring to fig. 2, fig. 2 shows a schematic view of a heat conductive plate and a flexible heat conductive layer. In order to ensure that a good heat transfer effect is achieved between the heat conducting plate 3 and the adjacent single battery 1, a flexible heat conducting layer 31 is arranged on the heat conducting plate 3, and the heat conducting plate 3 is connected with the adjacent single battery 1 through the flexible heat conducting layer 31. The flexible connection between the heat conducting plate 3 and the single battery 1 is realized through the arranged flexible heat conducting layer 31, the flexible heat conducting layer 31 is abutted against the large surface of the single battery 1, and under the condition that the heat conducting plate 3 is matched with the adjacent single battery 1 to clamp the flexible heat conducting layer 31, the flexible heat conducting layer 31 can be automatically matched with the large surface of the single battery 1, so that the flexible heat conducting layer 31 is ensured to be in full contact with the large surface of the single battery 1; at the same time, a complete contact between the flexible heat conducting layer 31 and the heat conducting plate 3 can be achieved.
The heat conduction layer 31 through setting up makes between heat conduction board 3 and the adjacent battery cell 1 can realize the conduction intercommunication of maximum area, compares in the direct condition with the big face butt of battery cell 1 of heat conduction board 3, is difficult to appear the condition that heat conduction board 3 can't laminate completely with the big face of battery cell 1, and heat conduction efficiency is higher, and the heat that battery cell 1 produced can be faster transmits adjacent heat conduction board 3, carries out the effect of soaking to battery cell 1 of different positions better.
Meanwhile, when the plurality of single batteries 1 are packaged in the packaging shell 2, the plurality of single batteries 1 are in a tight-supporting state, and the problem that the single batteries 1 are excessively pressed can be solved through the arranged flexible heat conducting layer 31; when the single battery 1 has the bulge problem, the flexible heat conduction layer 31 can absorb the space compression caused by the bulge, so that the problem that the single battery 1 is damaged due to overlarge pressure caused by the bulge is reduced.
For the flexible heat conducting layer 31, the material is one or more of heat conducting silicone grease, heat conducting pad and heat conducting rubber. The heat conduction silicone grease is used, and the heat conduction silicone grease is directly coated on the heat conduction plate 3 or the single battery 1, and the heat conduction plate 3 and the single battery 1 are arranged according to a preset sequence, so that the heat conduction connection between the heat conduction plate 3 and the adjacent single battery 1 is realized through the arranged heat conduction silicone grease. When the heat conducting rubber is selected, the heat conducting rubber can be directly and fixedly connected to the heat conducting plate 3, and the heat conducting plate 3 is clamped between the adjacent single batteries 1.
When two different materials are used, the heat conduction silicone grease and the heat conduction rubber are used at the same time in an exemplary manner, the heat conduction rubber is fixedly connected with the heat conduction plate 3, the heat conduction rubber and the heat conduction plate 3 can be fixed in a hot melting mode, and then the heat conduction silicone grease is smeared on the heat conduction rubber, so that the heat conduction plate 3, the heat conduction rubber and the single battery 1 are connected, and heat conduction is realized.
Referring to fig. 3 and 4, fig. 3 shows a schematic structural diagram of the heat conductive plate, and fig. 4 shows a schematic structural diagram of a connection between the heat conductive plate and the vapor chamber. The edges of the soaking plates 4 facing the two sides of the heat-conducting plate 3 are respectively provided with a bending part 32, and the bending parts 32 and the heat-conducting plate 3 are integrally formed; the vapor chamber 4 is provided with a plurality of through holes 41, and the through holes 41 are correspondingly matched with the bending parts 32 on the heat conducting plates 3 one by one. The bending parts 32 penetrate through the corresponding through holes 41, and the parts of the bending parts 32 penetrating through the through holes 41 are bent to form bending parts, and the bending parts of the bending parts 32 are attached to one surface of the vapor chamber 4, which is away from the heat conducting plate 3.
The bending part 32 is connected with the soaking plate 4, the connection of the bending part 32 and the soaking plate 4 is convenient, meanwhile, the bending part of the bending part 32 is attached to the soaking plate 4, the connection of the bending part and the soaking plate 4 is stable, and compared with the mode of connecting the edge of the bending part 32 with the soaking plate 4, the heat conduction efficiency between the bending part and the soaking plate is higher.
In order to increase the heat conduction area between the heat conduction plate 3 and the soaking plate 4 as much as possible, a bent portion of each bent portion 32 is provided to cover the first region on the soaking plate 4. The first region is a region between two adjacent through holes 41 on the soaking plate 4, and the range of the first region outside the through holes 41 at the end can be referred to the range of the first region before the other two adjacent through holes 41. The bending part provided with the bending part 32 covers the first area, so that the heat conduction area between the heat conduction plate 3 and the soaking plate 4 is increased while two adjacent bending parts 32 are not interfered, and the heat conduction efficiency is higher.
Of course, in other embodiments, the bent portion of the bending portion 32 may not completely cover the first area, or the bent portion of the bending portion 32 may cover a partial area outside the first area. The above arrangements are all to increase the heat conduction area between the heat conduction plate 3 and the soaking plate 4, and the positions where the heat conduction plate 3 and the soaking plate 4 are specifically connected are not limited.
In addition, dodging groove 42 that holds the portion of bending of portion 32 is offered to the side that soaking plate 4 deviates from heat-conducting plate 3, and the portion of bending of portion 32 is located dodging groove 42 under the state that the soaking plate 4 is pasted mutually for the portion of bending of portion 32 deviates from single battery 1's one side with soaking plate 4 deviates from single battery 1's one side parallel and level. Firstly, one side of the vapor chamber 4 away from the single battery 1 is kept flush, and the vision is more attractive; secondly, when parts such as encapsulation or installation heat dissipation module are carried out, the installation is comparatively convenient, and comparatively convenient the planarization of guaranteeing part installation basis.
Through the setting, soaking before can realizing a plurality of battery cells 1 for in the in-process of using, the temperature of a plurality of battery cells 1 of adjustment tends to be the same, prolongs battery module's life, promotes battery module quality, and makes battery module safer.
Referring to fig. 5 in combination with fig. 1, fig. 5 shows a schematic structural diagram of a heat dissipating assembly. In order to reduce the overall temperature of the plurality of single batteries 1, the battery module is provided with two heat dissipation assemblies 5, the two heat dissipation assemblies 5 are respectively arranged on the two soaking plates 4, and respectively dissipate heat of the two soaking plates 4, so that the heat dissipation of the single batteries 1 is realized, the problem of the single batteries 1 is reduced, and the condition that the performance of the single batteries 1 is reduced due to a high-temperature environment is reduced.
The heat-conducting material is arranged between the heat-radiating component 5 and the soaking plate 4, is filled or clamped between the heat-radiating component 5 and the soaking plate 4, is also made of flexible materials, ensures the contact integrity of the heat-radiating component 5 and the soaking plate 4, increases the heat-conducting area between the heat-radiating component 5 and the soaking plate 4, and has better heat-radiating effect of the heat-radiating component 5.
In addition, a heat conducting material is also arranged between the bending part of the bending part 32 and the vapor chamber 4, and the heat conducting material can be filled or clamped before the bending part of the bending part 32 and the vapor chamber 4, so that the heat conducting effect between the bending part 32 and the vapor chamber 4 is improved, and the heat conducting effect is better.
For the heat conducting material, one or more of phase change heat conducting material, heat conducting pad, heat conducting adhesive tape, heat conducting rubber, heat conducting pouring sealant or heat conducting silicone grease can be selected, and the adhesive material can also play a role in adhesion, so that the connection between the bending part 32 and the soaking plate 4 and the connection between the heat radiating component 5 and the soaking plate 4 are firmer.
Continuing to introduce the radiating component 5 that sets up, this radiating component 5 is integrated into the radiator, including liquid cooler 51 and forced air cooler 52, liquid cooler 51 installs on vapor chamber 4, and forced air cooler 52 sets up on liquid cooler 51 the side that deviates from vapor chamber 4. Of course, in other embodiments, the heat dissipating assembly 5 may be only liquid cooled or only air cooled, and the embodiments of the present application will be described only by taking the heat dissipating assembly 5 including a liquid cooler and an air cooler as an example.
The liquid cooler 51 includes a liquid cooling block 511 fixed on the vapor chamber 4, and a liquid inlet 512 and a liquid outlet 513 are formed in the liquid cooling block 511, and cooling liquid is introduced into the liquid cooling block 511 to cool the vapor chamber 4. The air cooler 52 comprises a plurality of fins and/or heat pipes fixedly connected to the liquid cooling block 511, and the contact area between the liquid cooling block 511 and the outside is increased through the fins and/or heat pipes; in addition, the air cooler 52 further includes a cooling fan, which is fixed on the fins and/or the heat pipes, and accelerates the air circulation by cooling the fan, thereby improving the heat dissipation effect; in the embodiment, a cooling fan is not required, and heat is dissipated through the arranged fins and/or the heat pipe in a natural cooling mode; of course, only the heat radiation fan can be arranged, and the fins and the heat pipes are not arranged, so that different heat radiation modes can be selected according to actual conditions in actual use.
The heat dissipation of the soaking plate 4 is realized through the heat dissipation assembly 5, namely, the temperature of the single batteries 1 is reduced, the ageing of the single batteries 1 is slowed down, the service life of the single batteries is prolonged, and the working efficiency of the battery module can be improved; in order to maintain the operating temperature of the unit cell 1 at a proper temperature value while considering the balance between the heat dissipation effect and the consumed power, the battery module is further provided with a means for controlling the operation of the heat dissipation assembly 5 according to the temperature of the soaking plate 4.
Specifically, referring to fig. 6 and 7, fig. 6 is an enlarged schematic diagram of a portion a in fig. 1, and fig. 7 is a schematic diagram of temperature regulation control. The battery module further comprises a temperature sensor 6 and a controller 7, wherein the temperature sensor 6 is arranged on the soaking plate 4 and is used for detecting the temperature of the soaking plate 4, the controller 7 is connected with the temperature sensor 6 and the heat dissipation assembly 5 in a signal-sharing mode, and specifically, the controller 7 receives the temperature value of the soaking plate 4 detected by the temperature sensor 6 and respectively controls the liquid cooler 51 and the air cooler 52 to work; for convenience of explanation, the following description will take an example in which the air cooler 52 uses a fan to dissipate heat.
When the temperature sensor 6 detects that the temperature of the soaking plate 4 is different, the controller 7 compares the detected temperature value of the soaking plate 4 with the first set temperature and the second set temperature, and controls the heat dissipation assembly 5 to execute corresponding heat dissipation action according to different comparison results. The first set temperature value is smaller than the second set temperature value, and the first set temperature value is the maximum value of the proper working temperature range defined by the single battery 1. Specifically, the following cases are included:
when the temperature of the soaking plate 4 detected by the temperature sensor 6 is greater than the first set temperature, the heat dissipation assembly 5 is controlled to dissipate heat of the soaking plate 4.
When the heat dissipation assembly 5 includes the liquid cooler 51 and the air cooler 52, controlling the heat dissipation assembly 5 to dissipate heat from the vapor chamber 4 includes the following examples.
When the temperature of the soaking plate 4 detected by the temperature sensor 6 is greater than the first set temperature and less than the second set temperature, the controller 7 controls the liquid cooler 51 or the air cooler 52 to independently work to radiate heat of the soaking plate 4, and cools the soaking plate 4 until the temperature of the soaking plate 4 detected by the temperature sensor 6 is reduced to be less than the first set temperature, so that the single battery 1 is in a fixed proper working temperature range.
When the temperature of the soaking plate 4 detected by the temperature sensor 6 is greater than the second set temperature, the controller 7 controls the liquid cooler 51 and the air cooler 52 to work together to radiate heat from the soaking plate 4. For example, in the case where the temperature of the soaking plate 4 is greater than the second set temperature, in the process of radiating the soaking plate 4 by independently operating the liquid cooler 51 or the air cooler 52, the unit cell 1 continuously generates heat, and the heat generated by the unit cell 1 is greater than the heat dissipating capacity of the heat dissipating component 5, so that the temperature of the soaking plate 4 continuously rises to be greater than the second set temperature.
In addition, the battery module further comprises a timer 8, wherein the timer 8 is used for detecting the time when the liquid cooler 51 or the air cooler 52 works independently to radiate the heat of the vapor chamber 4; when the liquid cooler 51 or the air cooler 52 works alone to dissipate heat of the soaking plate 4 for a set period of time and the temperature of the soaking plate 4 detected by the temperature sensor 6 is still greater than the first set temperature, the controller 7 controls the liquid cooler 51 and the air cooler 52 to work together to dissipate heat of the soaking plate 4 until the temperature of the soaking plate 4 detected by the temperature sensor 6 is less than the first set temperature.
For the specific time of the set time period, it may be specifically defined according to the type of the battery cell 1, and a person skilled in the relevant art may determine a specific value of the set time period according to the existing standard and common knowledge in the art.
Of course, in actual use, the temperature of the soaking plate 4 detected by the temperature sensor 6 is less than the first set temperature, and at this time, the liquid cooler 51 and the air cooler 52 are controlled to be in a standby or off state; that is, when the temperature of the soaking plate 4 is lower than the first set temperature, active heat dissipation is not performed on the soaking plate 4.
In the embodiment of the application, the heat dissipation of the soaking plate 4 at different temperature values is realized only by adjusting the opening and closing states of the liquid cooler 51 and the air cooler 52; in other embodiments, when the heat dissipation module 5 is required to dissipate heat from the soaking plate 4, the heat dissipation effect on the soaking plate 4 can be adjusted by adjusting the operating power of the liquid cooler 51 and the air cooler 52.
For example, when the temperature sensor 6 detects that the temperature of the vapor chamber 4 is greater than the first set temperature and less than the second set temperature, the liquid cooler 51 or the air cooler 52 is controlled to operate with smaller power to perform heat dissipation on the vapor chamber 4 alone, and after a certain duration, if the temperature of the vapor chamber 4 is still greater than the first set temperature, the operating power of the liquid cooler 51 or the air cooler 52 is gradually increased. In this way, the initial power of the operation of the liquid cooler 51 or the air cooler 52, the power value adjusted each time, and the duration of the operation of each power are all determined by factors such as the type of the single battery 1, the type and model of the liquid cooler 51, the type and model of the air cooler 52, and the like, and specifically, those skilled in the art can determine the initial power directly or after calculation according to the existing knowledge, and the embodiment of the present application will not be described in detail.
Referring to fig. 1, two temperature sensors 6 are provided, and the two temperature sensors 6 are provided along the arrangement direction of the plurality of unit cells 1, and the distance from each temperature sensor 6 to the end of the soaking plate 4 is 1/3 to 1/4 of the entire length of the soaking plate 4. Illustratively, the distance between each temperature sensor 6 and the end of the soaking plate 4 is 1/4 of the whole length of the soaking plate 4, that is, each temperature sensor 6 is responsible for detecting the temperature of half of the soaking plate 4, and each temperature sensor 6 is respectively located at the middle position of half of the soaking plate 4. Each temperature sensor 6 is respectively responsible for detecting the temperature of half of the soaking plate 4, so that cross interference between the two temperature sensors 6 is reduced.
The distance between the sensor and the end part of the soaking plate 4 is set to be 1/3 of the whole length of the soaking plate 4, the heat generation amount of the single battery 1 positioned in the middle part is larger than that of the single battery 1 positioned at the side, namely the temperature change amplitude of the single battery 1 positioned in the middle part is larger than that of the single battery 1 positioned at the side, and the area between the two temperature sensors 6 is jointly detected through the two temperature sensors 6, so that the detection accuracy is improved.
The application also provides a temperature regulation method of the battery module, which is applied to the battery module provided by the application, and realizes regulation of the temperature of the single battery 1, and specifically comprises the following steps with reference to fig. 8:
Step 01: the temperature of the soaking plate 4 was detected.
Specifically, the temperature of the soaking plate 4 is detected by the temperature sensors 6, and the number and the setting positions of the temperature sensors 6 are all required to be the temperature sensors 6 in the battery module provided by the application.
Step 02: and when the detected temperature of the soaking plate 4 is greater than a first set temperature, controlling the heat radiating component 5 to radiate heat to the soaking plate 4.
Specifically, when the temperature sensor 6 detects that the temperature of the soaking plate 4 is greater than the first set temperature, the controller 7 controls the heat dissipation assembly 5 to dissipate heat from the soaking plate 4.
When the heat dissipation assembly 5 includes the liquid cooler 51 and the air cooler 52, controlling the heat dissipation assembly 5 to dissipate heat from the soaking plate 4 may include the following steps:
step a: when the detected temperature of the soaking plate 4 is higher than the first set temperature and lower than the second set temperature, the liquid cooler 51 or the air cooler 52 is controlled to work independently to radiate heat of the soaking plate 4.
Step b: when the detected temperature of the soaking plate 4 is higher than the second set temperature, the liquid cooler 51 and the air cooler 52 are controlled to work together to radiate heat of the soaking plate 4.
In the case where the detected temperature of the soaking plate 4 is greater than the second set temperature, for example, the liquid cooler 51 or the air cooler 52 works alone to dissipate heat of the soaking plate 4, and the dissipated heat is smaller than the heat generated by the single battery 1, so that the temperature continuously rises to be greater than the second set temperature.
Step c: when the detected working time of the liquid cooler 51 or the air cooler 52 for cooling independently is longer than a set period and the detected temperature of the soaking plate 4 is higher than a first set temperature and lower than a second set temperature, the liquid cooler 51 and the air cooler 52 are controlled to work together for cooling the soaking plate 4 until the detected temperature of the soaking plate 4 is lower than the first set temperature.
Specifically, the time of the operation of cooling the liquid cooler 51 or the air cooler 52 alone is detected by the timer 8.
Of course, the above method may further include step 03, where the step is: when the detected temperature of the soaking plate 4 is smaller than the first set temperature, the liquid cooler 51 and the air cooler 52 are controlled to be in a shutdown or standby state. That is, when the detected temperature of the soaking plate 4 is lower than the first set temperature, heat is not radiated to the soaking plate 4.
It should be understood that, in the above method, the working states of the liquid cooler 51 and the air cooler 52 are two states, i.e. on or off, and the heat dissipation capacity of the heat dissipation assembly 5 is adjusted to adjust the heat dissipation capacity of the soaking plate 4. In other embodiments, besides controlling the working states of the liquid cooler 51 and the air cooler 52 to be on or off, the working powers of the liquid cooler and the air cooler 52 can be adjusted to realize the adjustment of the heat dissipation capability of the heat dissipation assembly 5, and the specific method for adjusting the working powers can refer to the principle of adjusting the working powers of the liquid cooler 51 and the air cooler 52 in the battery module disclosed by the application, and details of this part will not be described herein.
It should be noted that, in the description of the present application, it is necessary to perform corresponding control according to the magnitude relation between the detected temperature of the soaking plate 4 and the first set temperature and the second set temperature, and when the detected temperature of the soaking plate 4 is the first set temperature, the heat dissipation operation in which the temperature of the soaking plate 4 is less than the first set temperature is executed; when the detected soaking plate 4 is at the second set temperature, the heat radiation operation is executed when the temperature of the soaking plate 4 is greater than the first set temperature and less than the second set temperature.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc. are directions or positional relationships based on the operation state of the present application are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited; in addition, a plurality of the present application is referred to as two or more. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The application has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the application can be subjected to various substitutions and improvements, and all fall within the protection scope of the application.
Claims (10)
1. A temperature control system of a battery module, comprising:
the heat conducting plate is contacted with the adjacent single batteries through the flexible heat conducting layer so as to conduct heat between the heat conducting plate and the adjacent single batteries;
the soaking plates are connected with the heat conducting plates and used for soaking the heat conducting plates;
The heat dissipation assembly comprises a liquid cooler and an air cooler;
The controller is used for controlling the liquid cooler or the air cooler to independently radiate heat of the soaking plate when the temperature of the soaking plate detected by the temperature sensor is larger than a first set temperature and smaller than a second set temperature; and the controller is also used for controlling the liquid cooler and the air cooler to jointly radiate heat of the soaking plate when the temperature of the soaking plate detected by the temperature sensor is greater than a second set temperature.
2. The temperature control system of a battery module according to claim 1, further comprising:
The timer is used for detecting the working time of the liquid cooler or the independent heat dissipation of the air cooler, and the controller is also used for controlling the liquid cooler and the air cooler to jointly dissipate heat of the soaking plate when the detected working time is longer than a set time length and the temperature of the soaking plate is still longer than a first set temperature.
3. The temperature control system of a battery module according to claim 1 or 2, wherein the heat conductive plate is provided with a bent portion;
the vapor chamber is provided with a through hole matched with the bending part;
The bending part penetrates through the through hole, the bending part of the bending part is attached to one surface of the vapor chamber, which is away from the heat conducting plate, and the bending parts of the adjacent bending parts are not overlapped.
4. The temperature control system of the battery module according to claim 3, wherein an avoidance groove for accommodating the bending portion of the bending portion is formed in one side, away from the single battery, of the soaking plate, so that one side, away from the single battery, of the bending portion is flush with one side, away from the single battery, of the soaking plate.
5. The temperature control system of a battery module according to claim 1 or 2, wherein the air cooler is located at a side of the liquid cooler facing away from the soaking plate;
the heat dissipation assembly is arranged on one side of the soaking plate, which is away from the single battery.
6. The temperature control system of a battery module according to claim 1 or 2, wherein the number of the temperature sensors is two, the two temperature sensors are arranged along the arrangement direction of the plurality of unit cells, and the distance from each temperature sensor to the end of the soaking plate close to the temperature sensor is 1/4 to 1/3 of the length of the soaking plate.
7. The temperature control system of a battery module according to claim 1 or 2, wherein the liquid cooler comprises a liquid cooling block, and a liquid inlet and a liquid outlet are arranged on the liquid cooling block;
The air cooler comprises fins and/or heat pipes arranged on the liquid cooling block, and the air cooler is cooled by a fan and/or naturally cooled.
8. The temperature control system of a battery module according to claim 1 or 2, wherein the heat conductive plates are provided at both sides of the two largest sides opposite to each of the unit cells.
9. The temperature control system of a battery module according to claim 3, wherein two soaking plates are provided, the two soaking plates are respectively positioned at two sides of a plurality of single batteries, and two ends of each heat conducting plate are respectively connected with the soaking plates at corresponding sides;
a heat conducting material is arranged between the bending part of the bending part and the soaking plate, and/or,
A heat conducting material is arranged between the heat radiating component and the soaking plate;
The heat conducting material is at least one of phase change heat conducting material, heat conducting pad, heat conducting adhesive tape, heat conducting rubber, heat conducting pouring sealant and heat conducting silicone grease.
10. A battery module, comprising: a plurality of unit cells, and the temperature control system of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410127895.9A CN117936983A (en) | 2022-12-20 | 2022-12-20 | Temperature control system of battery module and battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211642362.1A CN115732803B (en) | 2022-12-20 | 2022-12-20 | Battery module and temperature regulation and control method thereof |
| CN202410127895.9A CN117936983A (en) | 2022-12-20 | 2022-12-20 | Temperature control system of battery module and battery module |
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| CN202211642362.1A Division CN115732803B (en) | 2022-12-20 | 2022-12-20 | Battery module and temperature regulation and control method thereof |
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| CN202410127895.9A Pending CN117936983A (en) | 2022-12-20 | 2022-12-20 | Temperature control system of battery module and battery module |
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| CN117533197A (en) * | 2023-11-29 | 2024-02-09 | 惠州市中源新能源有限公司 | Battery module for low-speed vehicle and BMS control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6373042B2 (en) * | 2014-04-04 | 2018-08-15 | 古河電気工業株式会社 | Battery temperature control system |
| CN104037373B (en) * | 2014-05-22 | 2016-06-01 | 江苏华东锂电技术研究院有限公司 | Series of cells and there is the battery module of this series of cells |
| JP2017162601A (en) * | 2016-03-08 | 2017-09-14 | 日本碍子株式会社 | Module battery |
| CN107275559B (en) * | 2017-06-02 | 2020-04-24 | 深圳市欣旺达电气技术有限公司 | Battery pack device |
| CN107403974B (en) * | 2017-07-13 | 2020-01-07 | 浙江超威创元实业有限公司 | Integrated power battery heat conduction and temperature equalization system |
| CN110137616A (en) * | 2018-02-02 | 2019-08-16 | 北京海博思创科技有限公司 | A kind of battery thermal management system |
| CN108470959A (en) * | 2018-03-28 | 2018-08-31 | 精进电动科技股份有限公司 | A kind of power battery pack heat management assembly |
| CN110311189A (en) * | 2019-08-12 | 2019-10-08 | 深圳市嘉名科技有限公司 | Battery modules, battery pack, electric vehicle and network system |
| CN110854465B (en) * | 2019-10-22 | 2022-07-22 | 江苏大学 | Battery box heat management system considering heat recovery and control method thereof |
| CN219476787U (en) * | 2022-12-20 | 2023-08-04 | 重庆太蓝新能源有限公司 | Battery thermal management device |
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| CN115732803B (en) | 2024-02-27 |
| CN115732803A (en) | 2023-03-03 |
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