CN219476787U - Battery thermal management device - Google Patents

Abstract

The application provides a battery thermal management device for a plurality of electric core heat dissipation and/or soaking that array was arranged, include: a plurality of heat-conducting plates and at least one soaking plate; wherein each heat conducting plate is inserted between at least part of two adjacent electric cores, and at least part of the electric cores are contacted with the heat conducting plates adjacent to the electric cores so as to conduct heat between the heat conducting plates and the electric cores adjacent to the heat conducting plates; the soaking plates are arranged on at least one side of the battery cell, the end parts of the heat conducting plates are connected to the soaking plates in a one-to-one correspondence mode, and the soaking plates are used for soaking the heat conducting plates so that the temperatures of all the heat conducting plates and the battery cell adjacent to the heat conducting plates tend to be balanced. In the technical scheme, soaking of a plurality of battery cells is realized through the heat conducting plate and the soaking plate, consistency of the battery cells is improved, quality of the battery is improved, and service life is prolonged.

Description

Battery thermal management device

Technical Field

The application relates to the technical field of batteries, in particular to a battery thermal management device.

Background

The battery module generates heat in the charging and discharging processes, the battery module is generally formed by assembling a plurality of electric cores, and in the charging and discharging processes, the electric cores in the same battery module generate heat in the charging and discharging processes due to various factors such as circuit connection positions, property differences of the electric cores and the like, so that the temperatures of the electric cores in the battery module are different; under the condition that the existing battery module dissipates heat through the radiator, the temperature of different parts of the module is reduced, and the temperature of the battery cells at different positions still has differences. If the battery cell is used at high temperature for a long time, the problems of service life reduction, abnormal self-discharge, internal resistance increase and the like can be caused. The factors that determine the operating performance of a battery module are, in large part, the uniformity of each cell therein. In popular terms, if the cells with poor consistency are assembled into a battery module, it is possible that during normal discharging, when most of the cells can still work effectively, the individual cells therein form overdischarge due to insufficient electric quantity, so that the whole battery module cannot work.

Under the effect of different temperatures, especially along with the extension of live time, different temperatures act on a plurality of electric cores for the ageing of different degree takes place for the self nature of a plurality of electric cores, makes follow-up in the use battery module in a plurality of electric cores charge-discharge capacity have very big difference, leads to the module in through the battery monomer that capacity screening is unanimous on the contrary to produce great capacity deviation value, and the battery monomer capacity inconsistency can lead to in the module: in the charging and discharging process of the module, the problem of overcharging/overdischarging of the battery with low capacity can occur, the cycle life of the module is influenced, and the safety of the module is even greatly reduced.

Disclosure of Invention

The application provides a battery thermal management device for reduce a plurality of electric core appearance property differentiation under the effect of different temperatures in the battery module, guarantee the synchronism of a plurality of electric core state changes, extension equipment life promotes the security.

A battery thermal management device for dissipating heat and/or soaking heat from a plurality of cells arranged in an array, comprising: a plurality of heat-conducting plates and at least one vapor chamber; wherein each heat conducting plate is inserted between at least part of two adjacent electric cores, and at least part of the electric cores are contacted with the heat conducting plates adjacent to the electric cores so as to conduct heat between the heat conducting plates and the electric cores adjacent to the heat conducting plates; the soaking plates are arranged on at least one side of the battery cell, the end parts of the heat conducting plates are connected to the soaking plates in a one-to-one correspondence mode, and the soaking plates are used for soaking the heat conducting plates so that the temperatures of all the heat conducting plates and the battery cell adjacent to the heat conducting plates tend to be balanced.

In the technical scheme, the battery thermal management device is used for soaking the plurality of battery cells by arranging the heat conducting plate and the soaking plate, heat generated by the battery cells is conducted to the soaking plate through the heat conducting plate, and the heat of the part with high temperature on the soaking plate is conducted to the part with low temperature and is conducted to the battery cells with low temperature, so that the temperatures of the plurality of battery cells tend to be the same, namely the change of the plurality of battery cells is synchronous, the problem that part of battery cells are overcharged and overdischarged is difficult to occur in the subsequent use process, the aging problem of the battery cells is slowed down, the service life is prolonged, and meanwhile, the use safety can be improved.

In a specific embodiment, the placement and design number of the heat conductive plates are configured as follows: and enabling at least one side surface of each electric core to be in contact with the heat conducting plate, or enabling two sides of two largest side surfaces of each electric core to be in contact with the heat conducting plate.

In a specific embodiment, the heat conducting plate further comprises a flexible heat conducting layer, and the heat conducting plate is connected with the adjacent electric core through the flexible heat conducting layer. The flexible heat conducting layer is in full contact with the large surface of the battery core and is in full contact with the heat conducting plate, so that the heat conducting area between the battery core and the heat conducting plate is maximized, and the heat conducting effect is better; the flexible heat conduction layer has a buffer effect, can absorb deformation generated by expansion of the battery cell, and reduces the damage problem caused by overlarge pressure of the battery cell.

In a specific embodiment, the flexible heat-conducting layer is at least one of a heat-conducting silicone grease, a heat-conducting pad, and a heat-conducting rubber. The flexible heat conduction layer is convenient to select specific materials according to actual needs, and the flexible heat conduction layer is convenient to select.

In a specific implementation manner, two soaking plates are arranged, the two soaking plates are respectively positioned at two sides of a plurality of electric cores, and two ends of each heat conducting plate are respectively connected with the soaking plates at corresponding sides. The heat of the heat conducting plate is simultaneously transferred to the soaking plates at the two sides, so that the heat on the heat conducting plate is more quickly transferred to the soaking plates, compared with the condition that the soaking plate is arranged on one side, the soaking effect on the plurality of heat conducting plates is better.

In a specific embodiment of the present utility model, 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, and the bending part of the bending part is attached to one surface of the vapor chamber, which is away from the heat conducting plate. The heat-conducting plate is connected with the soaking plate conveniently, meanwhile, the connection stability of the heat-conducting plate and the soaking plate can be guaranteed, the heat-conducting plate and the soaking plate are arranged to be in surface contact, and compared with a line contact mode, the heat transfer efficiency is improved.

In a specific embodiment, the bent portion of the bending portion covers at least part of the first region;

the first area is an area between every two through holes on the vapor chamber. The contact area between the heat conducting plate and the soaking plate is maximized as much as possible, and the heat conduction efficiency is improved.

In a specific implementation manner, an avoidance groove for accommodating the bending part of the bending part is formed in one side, away from the electric core, of the soaking plate, so that one side, away from the electric core, of the bending part is flush with one side, away from the electric core, of the soaking plate. The soaking plate is smoother in the outside, and the wholeness is better, and when other parts are installed to follow-up, can provide a smooth installation basis, follow-up installation is comparatively convenient and stable.

In a specific implementation manner, the solar cell module further comprises a heat dissipation assembly, wherein the heat dissipation assembly is arranged on one side of the soaking plate, which is away from the cell, and is connected with the soaking plate. And the soaking plate is subjected to heat dissipation, so that heat generated by the battery cells is dissipated in time, the problem that the battery cells are damaged due to the fact that the battery cells are in a high-temperature environment for a long time is solved, the quality of each battery cell and each battery module is improved, and the service life of a battery system is prolonged.

In a specific embodiment, the method further comprises:

the temperature sensor is used for detecting the temperature of the soaking plate;

and the controller is used for controlling the heat dissipation component to dissipate heat to the soaking plate when the temperature of the soaking plate detected by the temperature sensor is greater than a first set temperature. When the soaking plate stably exceeds the first set temperature, the heat dissipation assembly is controlled to dissipate heat, namely, the heat generated by the battery cell is small and active heat dissipation is not performed under the condition that the performance of the battery cell is not influenced sufficiently, so that the energy consumption is reduced, and the energy is saved.

In a specific embodiment, the heat dissipation component is an integrated radiator, and the integrated radiator comprises a liquid cooler and an air cooler, wherein the air cooler is located at one side of the liquid cooler away from the vapor chamber. The specific heat dissipation mode can be selected according to actual needs, and the heat dissipation effect on the soaking plate is better.

In a specific 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. The heat dissipation efficiency of the soaking plate can be improved by using the heat dissipation plate and the soaking plate simultaneously.

In a specific implementation manner, the controller is configured to control the liquid cooler or the air cooler to individually dissipate heat from the soaking plate when the temperature of the soaking plate detected by the temperature sensor is greater than the first set temperature;

the controller is further 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;

the second set temperature is greater than the first set temperature. According to the detected temperature value of the vapor chamber, the liquid cooler and the air cooler are controlled to work independently or jointly, and the energy consumption is reduced on the premise of meeting the heat dissipation requirement.

In a specific embodiment, the method further comprises:

the timer is used for detecting the working time of the liquid cooler or the air cooler for radiating independently;

the controller is further used for controlling the liquid cooler and the air cooler to jointly radiate heat to the soaking plate when the working time of the liquid cooler or the air cooler for independent heat radiation detected by the timer is longer than a set duration and the temperature of the soaking plate detected by the temperature sensor is higher than a first set temperature. The situation that the requirement of cooling is difficult to realize for a long time under the condition that the liquid cooler or the air cooler independently dissipates heat is reduced, whether the liquid cooler and the air cooler are required to work simultaneously or not is independently judged, heat dissipation regulation and control are more convenient, the situation that cooling is difficult to realize due to long-time heat dissipation is reduced, energy consumption is increased and cooling effect cannot be achieved on the battery cell is avoided, the effect of cooling the battery cell is better, and meanwhile energy sources can be saved.

In a specific implementation manner, the number of the temperature sensors is two, the two temperature sensors are arranged along the arrangement direction of the plurality of the electric cores, each of the temperature sensors is close to the soaking plate the distance between the ends of the soaking plate is 1/4-1/3 of the length of the soaking plate. The temperature of the soaking plate is detected under the condition that the number of the soaking plates is as small as possible, and waste is reduced.

In a specific embodiment, 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. Promote the fastness that corresponds structural connection to can increase the heat conduction area between the adapting unit, the heat conduction effect is better.

Drawings

Fig. 1 is a schematic structural diagram of a battery module and a battery thermal management device according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a heat conducting plate and a flexible heat conducting layer according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a heat-conducting plate according to an embodiment of the present disclosure;

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 disclosure;

fig. 5 is a schematic structural diagram of a heat dissipating assembly according to an embodiment of the present disclosure;

FIG. 6 is an enlarged schematic view of portion A of FIG. 1 provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of temperature control distancing provided in an embodiment of the present application;

fig. 8 is a schematic diagram of a temperature regulation method of a battery thermal management device according to an embodiment of the present application.

1. A battery cell; 2. packaging the shell; 3. a heat conductive plate; 31. a flexible thermally conductive layer; 32. a bending part; 4. are all a hot 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 present application is further described in detail below by way of the accompanying drawings 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 thermal management device provided by the application, an application scenario of a battery module related to the battery inside a battery is first described. The battery system provided by the embodiment of the application can comprise at least one battery module, wherein the battery module can comprise a plurality of electric cores, and the electric cores are connected and packaged into a whole through a shell to serve as an energy supply unit; in addition, in the case of the optical fiber, and is also provided with heat dissipation the module is used for scattered power generation heat generated during use of the core. However, the heat productivity and the heat dissipation capacity of the battery cells in the battery module are different, so that the temperatures of different parts of the battery module are different.

For example, when charging and discharging, the battery management system charges and discharges the battery cells sequentially or simultaneously according to the current state of charge (remaining capacity) of each battery cell (electric core), so that the heat productivity of the battery cells in different states of charge is often different.

For another example, most battery packs or battery modules in the prior art are configured with heat dissipation modules, and the heat dissipation effect of the battery cells near the discrete thermal modules is better than that of the battery cells far from the discrete thermal modules. The temperature of the battery monomer near the heat dissipation module is low, the temperature of the battery monomer at the central position of the module is high, even the temperature difference can reach more than 15 ℃, under the high temperature difference, the charge and discharge capacity of the battery monomer can be greatly different, the battery monomer in the module is subjected to capacity screening consistency to generate a larger capacity deviation value, the battery monomer capacity in the module is inconsistent, the problem of overcharging/overdischarging of the battery with lower capacity in the charge and discharge process of the module is caused, the cycle life of the module is influenced, and the safety of the module is even greatly reduced.

The battery cells are at different temperatures for a long time, so that the aging degrees of the different battery cells are different, synchronous change of the battery cells is difficult to realize, the charging and discharging processes of the battery cells in the battery module are different in the subsequent use process, the overcharge and overdischarge of part of the battery are caused, the service life of the battery module is shortened, and the potential safety hazard is increased.

Therefore, the embodiment of the application provides a battery thermal management device to promote the uniformity of a plurality of electric cores, promote battery module quality, increase of service life, and can promote the security. The battery module will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, fig. 1 shows a schematic structure of a battery module and a battery thermal management device. The battery module comprises a plurality of battery cells 1 and a packaging shell 2, wherein, the plurality of battery cells 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 battery cells 1 in a surrounding mode, and the side plates are fixedly connected to realize packaging of the plurality of battery cells 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 battery cells 1, and the embodiment of the application does not need to describe the packaging shell 2 again.

The battery thermal management device comprises a plurality of heat conducting plates 3 and at least one soaking plate 4; wherein each heat conducting plate 3 is inserted between at least part of adjacent two cells 1, i.e. at least part of the cells 1 are in contact with the heat conducting plate 3 adjacent thereto, so as to conduct heat between the heat conducting plate 3 and the cells 1 adjacent thereto.

The soaking plates 4 are arranged on at least one side of the battery cell 1, and the end parts of each heat conducting plate 3 are connected to the soaking plates 4 in a one-to-one correspondence manner, and the soaking plates 4 are used for soaking each heat conducting plate 3 so that the temperatures of all the heat conducting plates 3 and the battery cells 1 adjacent to the heat conducting plates tend to be balanced.

In the above embodiment, in other words, at least part of the cells 1 are provided with the heat-conducting plates 3, and when the temperature thereof is high, heat can be transferred to the soaking plates 4 through the heat-conducting plates 3, and the soaking plates 4 balance the heat on the remaining heat-conducting plates 3 and also indirectly balance the heat on the remaining cells provided with the heat-conducting plates 3.

In some embodiments, the soaking plate 4 may be provided with one or two. Optionally, the two soaking plates 4 are arranged at two opposite sides of the plurality of battery cells 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 arrangement of the two vapor chamber is beneficial to accelerating the temperature equalization speed.

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 battery cell 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 battery cells 1 tend to be the same.

In the process of working the battery cell 1, the battery cell 1 generates heat to raise the temperature, and the heat of the battery cell 1 is conducted to the adjacent heat conducting plate 3; because the heat generated by the electric cores 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; at the same time, the temperature of the battery cell 1 and the adjacent heat conducting plate 3 tends to be the same through heat conduction.

Finally, through the heat conduction of the heat conduction plate 3 and the soaking of the soaking plate 4, the electric cores 1 at different positions have different heat generated by the electric cores, but the heat conduction of the temperature is realized through the heat conduction plate 3 and the soaking plate 4, so that the temperatures of the electric cores 1 tend to be the same; along with the extension of the service time, the property changes of a plurality of battery cells 1 tend to be synchronous, the process of charging and discharging is kept synchronous, the problems of overcharge and overdischarge of part of the battery cells 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 battery cell 1, the heating value of the battery cell 1, the heat conductivity coefficient of the heat conductive plates 3, and the like. Two or three electric cores 1 at each interval are provided with one heat conducting plate 3, and the quantity of the electric cores 1 at the interval between two adjacent heat conducting plates 3 is adjusted according to actual conditions, so that the heat of the electric cores 1 can be transferred to the soaking plate 4 through the heat conducting plates 3.

Similarly, the soaking plate 4 can be arranged as one, the soaking plate 4 is positioned at one side of the plurality of electric cores 1 and is connected with the plurality of heat conducting plates 3, and heat conduction between the heat conducting plates 3 and the electric cores 1 at different positions is realized through one soaking plate 4. In the embodiment of the present application, only two soaking plates 4 are provided, and each two adjacent heat conducting plates 3 are arranged with a cell 1 therebetween.

In some embodiments, the set positions and the design number of the heat conductive plates 3 are configured as follows: such that at least one side of each cell 1 is in contact with the heat conductive plate 3, or such that both sides of the two largest sides of each cell 1 are in contact with the heat conductive plate 3. Optionally, both sides of each cell 1 are provided with heat conducting plates 3, i.e. the outer sides of the cells 1 at the two most sides may also be provided with heat conducting plates 3, so as to enhance the heat dissipation effect and the soaking effect of all the cells 1, and also increase the heat conduction efficiency.

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 battery cells 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 battery cells 1 through the flexible heat conducting layer 31. The flexible connection between the heat conducting plate 3 and the battery cell 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 battery cell 1, and under the condition that the heat conducting plate 3 is matched with the adjacent battery cell 1 to clamp the flexible heat conducting layer 31, the flexible heat conducting layer 31 can automatically adapt to the large surface of the battery cell 1, so that the flexible heat conducting layer 31 is ensured to be in full contact with the large surface of the battery cell 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 is arranged to enable the heat conduction plate 3 to be in heat conduction communication with the adjacent battery cell 1 in the largest area, and compared with the situation that the heat conduction plate 3 is directly abutted to the large surface of the battery cell 1, the situation that the heat conduction plate 3 cannot be completely abutted to the large surface of the battery cell 1 is difficult to occur, the heat conduction efficiency is higher, heat generated by the battery cell 1 can be transferred to the adjacent heat conduction plate 3 more quickly, and the effect of soaking the battery cells 1 at different positions is better.

Meanwhile, when the plurality of battery cells 1 are packaged in the packaging shell 2, the plurality of battery cells 1 are in a tight-supporting state, and the problem that the battery cells 1 are excessively pressed can be solved through the arranged flexible heat conducting layer 31; when the cell 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 cell 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. For example, the heat-conducting silicone grease is selected to be used, the heat-conducting silicone grease is directly coated on the heat-conducting plate 3 or the battery cell 1, the heat-conducting plate 3 and the battery cell 1 are arranged according to a preset sequence, and the heat-conducting connection between the heat-conducting plate 3 and the adjacent battery cell 1 is realized through the arranged heat-conducting 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 battery cells 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 battery cell 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 the one side of electricity core 1 with soaking plate 4 deviates from the one side parallel and level of electricity core 1. Firstly, one side of the vapor chamber 4 away from the battery cell 1 is kept flush, and the appearance 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 arrangement, the battery thermal management device can realize soaking before a plurality of battery cells 1, so that the temperatures of the battery cells 1 are adjusted to be the same in the use process, the service life of a battery system is prolonged, the quality of each battery cell and the quality of a battery module are improved, and the battery system is 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 a plurality of battery cells 1, the battery thermal management device can be 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 battery cells 1 is realized, the problem of the battery cells 1 is reduced, and the condition that the performance of the battery cells 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 dissipation assembly 5 may be only liquid-cooled or only air-cooled, and in this embodiment, only an integrated radiator in which the heat dissipation assembly 5 adopts two heat dissipation modes, i.e., integrated air cooling and liquid cooling, is described 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 plurality of battery cells 1 is reduced, the aging of the battery cells 1 is slowed down, the service life of the battery cells is prolonged, and the working efficiency of the battery module can be improved; in order to maintain the operating temperature of the battery cell 1 at a suitable temperature value while considering the balance between the heat dissipation effect and the consumed power, the battery thermal management device is further provided with a component for regulating 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 thermal management device 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 in signal connection with the temperature sensor 6 and the heat dissipation assembly 5, 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 be given by taking a manner in which the air cooler 52 radiates heat by a fan as an example.

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 battery cell 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 battery cell 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, when the temperature of the soaking plate 4 is greater than the second set temperature, the battery cell 1 continuously generates heat during the heat dissipation process of the soaking plate 4 by the liquid cooler 51 or the air cooler 52, and the heat generated by the battery cell 1 is greater than the heat dissipation capacity of the heat dissipation 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 thermal management device 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 a 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 battery cell 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 directly or after calculating 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, the two temperature sensors 6 are arranged along the arrangement direction of the plurality of electric cores 1, and the distance between each temperature sensor 6 and the end of the soaking plate 4 is 1/3-1/4 of the whole 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 battery cell 1 positioned in the middle part is larger than that of the battery cell 1 positioned at the side, namely the temperature change amplitude of the battery cell 1 positioned in the middle part is larger than that of the battery cell 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 and control method of the battery thermal management device, which is applied to the battery module provided by the application, and realizes regulation and control of the temperature of the battery cell 1, and referring to fig. 8, the method specifically comprises the following steps:

step 01: detection vapor chamber 4 temperature.

Specifically, the temperature of the soaking plate 4 is detected through the temperature sensor 6, and the number and the setting positions of the temperature sensor 6 are all that the temperature sensor 6 in the battery module provided by the application is adopted.

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 battery cell 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, so as 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 in the application, and will not be described in detail 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 based on the directions or positional relationships in the working state of the present application, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element 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 in this application refers to two or more. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The present application has been described in connection with the preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On the basis of this, many alternatives and improvements can be made to the present application, which fall within the scope of protection of the present application.

Claims (15)

1. A battery thermal management device for dissipating heat and/or soaking heat from a plurality of cells arranged in an array, comprising: a plurality of heat-conducting plates and at least one vapor chamber;

wherein each heat conducting plate is inserted between at least part of two adjacent electric cores, and at least part of the electric cores are contacted with the heat conducting plates adjacent to the electric cores so as to conduct heat between the heat conducting plates and the electric cores adjacent to the heat conducting plates;

the soaking plates are arranged on at least one side of the battery cell, the end parts of the heat conducting plates are connected to the soaking plates in a one-to-one correspondence manner, and the soaking plates are used for soaking the heat conducting plates so that the temperatures of all the heat conducting plates and the battery cell adjacent to the heat conducting plates tend to be balanced;

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, and the bending part of the bending part is attached to one surface of the vapor chamber, which is away from the heat conducting plate.

2. The battery thermal management device according to claim 1, wherein the arrangement position and the design number of the heat conductive plates are configured to: and enabling at least one side surface of each electric core to be in contact with the heat conducting plate, or enabling two sides of two largest side surfaces of each electric core to be in contact with the heat conducting plate.

3. The battery thermal management device of claim 1 or 2, wherein the thermally conductive plate further comprises a flexible thermally conductive layer, the heat conducting plate is connected with the adjacent battery cells through the flexible heat conducting layer.

4. The battery thermal management device of claim 3, wherein the flexible thermally conductive layer is one of thermally conductive silicone grease, a thermally conductive gasket, and thermally conductive rubber.

5. The battery thermal management device according to claim 1 or 2, wherein two soaking plates are provided, the two soaking plates are respectively located at two sides of the plurality of electric cores, and two ends of each heat conducting plate are respectively connected with the soaking plates at corresponding sides.

6. The battery thermal management device of claim 1, wherein a bent portion of the bent portion covers at least a portion of the first region;

the first area is an area between every two through holes on the vapor chamber.

7. The battery thermal management device according to claim 1, wherein an avoidance groove for accommodating the bending portion of the bending portion is formed in one side, away from the battery cell, of the soaking plate, so that one side, away from the battery cell, of the bending portion is flush with one side, away from the battery cell, of the soaking plate.

8. The battery thermal management apparatus of claim 7, further comprising a heat dissipation assembly disposed on a side of the soaking plate facing away from the electrical core and connected to the soaking plate.

9. The battery thermal management apparatus of claim 8, further comprising:

the temperature sensor is used for detecting the temperature of the soaking plate;

and the controller is used for controlling the heat dissipation component to dissipate heat to the soaking plate when the temperature of the soaking plate detected by the temperature sensor is greater than a first set temperature.

10. The battery thermal management apparatus of claim 9, wherein the heat dissipation assembly is an integral heat sink comprising a liquid cooler and an air cooler, wherein the air cooler is located on a side of the liquid cooler facing away from the soaking plate.

11. The battery thermal management apparatus of claim 10, wherein the liquid cooler comprises a liquid cooling block, the liquid cooling block having a liquid inlet and a liquid outlet disposed thereon;

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.

12. The battery thermal management apparatus of claim 10, wherein the controller is configured to control the liquid cooler or the air cooler to dissipate heat from the soaking plate alone when the temperature of the soaking plate detected by the temperature sensor is greater than the first set temperature;

the controller is further 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;

the second set temperature is greater than the first set temperature.

13. The battery thermal management apparatus of claim 12, further comprising:

the timer is used for detecting the working time of the liquid cooler or the air cooler for radiating independently;

the controller is further used for controlling the liquid cooler and the air cooler to jointly radiate heat to the soaking plate when the working time of the liquid cooler or the air cooler for independent heat radiation detected by the timer is longer than a set duration and the temperature of the soaking plate detected by the temperature sensor is higher than a first set temperature.

14. The battery thermal management apparatus according to claim 13, wherein the number of the temperature sensors is two, the two temperature sensors are arranged along the arrangement direction of the plurality of electric cores, 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.

15. The battery thermal management apparatus according to claim 9, wherein a heat conductive material is provided between the bent portion of the bent portion 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 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.