Battery pack

Abstract

The utility model discloses a battery pack which comprises a plurality of battery monomers, a plurality of connecting pieces and a thermoelectric management device, and the plurality of battery monomers are arranged in an array; each battery monomer comprises a top cover and a pole arranged on the top cover, and the poles of two adjacent battery monomers are electrically connected through a connecting piece; the thermoelectric management device comprises an information acquisition assembly and a cooling assembly, the information acquisition assembly and the cooling assembly are stacked and connected, the cooling assembly is connected to at least one of the top cover and the connecting piece, and a flow channel is formed in the cooling assembly; the information acquisition assembly is connected to at least one of the connecting piece and the top cover. The integrated arrangement of the information acquisition assembly and the cooling assembly can reduce the manufacturing cost and improve the energy density of the battery pack.

Description

Technical Field

[0001] This application belongs to the technical field of battery packs, and specifically relates to a battery pack. Background Art

[0002] With the continuous development of the new energy industry, as the energy source, power batteries have become a new trend in the development of power batteries to improve the energy density and safety performance of battery packs. In practical applications, during the charging and discharging process of power batteries, a large amount of heat is generated during the electrochemical reaction. To ensure the safety of power batteries, it is necessary to monitor their voltage and temperature; at the same time, to improve their lifespan and performance, it is necessary to design a cooling system to control the temperature of power batteries.

[0003] In the prior art, to monitor the voltage and temperature of power batteries, a voltage and temperature acquisition system is usually designed on the top of battery cells, and to control the temperature of battery cells, a dedicated cooling system is usually designed. And the acquisition system and the cooling system are usually independent of each other.

[0004] However, the acquisition system and the cooling system occupy a relatively large space inside the battery pack, which is not conducive to improving the space utilization rate inside the battery pack. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide a battery pack, which can solve the problem that the acquisition system and the cooling system in the prior art occupy a relatively large space inside the battery pack.

[0006] To solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, the embodiments of this application provide a battery pack, including a plurality of battery cells, a plurality of connectors, and a thermoelectric management device. The plurality of battery cells are arranged in an array; each battery cell includes a top cover and a pole column arranged on the top cover, and the pole columns of two adjacent battery cells are electrically connected through a connector; the thermoelectric management device includes an information acquisition component and a cooling component. The information acquisition component and the cooling component are stacked and connected, the cooling component is connected to at least one of the top cover and the connector, and a flow channel is provided inside the cooling component; among them, the information acquisition component is connected to at least one of the connector and the top cover.

[0008] In practical applications, there are a plurality of battery cells in the battery pack, and the plurality of battery cells are arranged in an array in the battery pack. The setting of the connector is used to realize the electrical connection between battery cells. During the charging and discharging process of the battery pack, with the progress of the electrochemical reaction, a large amount of heat is inevitably generated. To protect the safety of the battery pack, it is necessary to set an information acquisition component to monitor the voltage and temperature of the battery pack. At the same time, to improve the lifespan and performance of the battery pack, it is necessary to set a cooling component to control the temperature of the battery pack.

[0009] In an embodiment of the present application, the thermoelectric management device includes an information acquisition component and a cooling component that are stacked and connected. It can be understood that the thermoelectric management device can simultaneously monitor the state information of the battery pack and cool the battery pack. That is to say, the integrated setting of the information acquisition component and the cooling component has the beneficial effect of improving the space utilization rate inside the battery pack, thereby improving the energy density of the battery pack.

[0010] Further, the battery cell includes a top cover and a terminal post. The connecting piece is respectively connected to the terminal posts of two battery cells to realize the electrical connection between the two battery cells. Among them, the cooling component is connected to the top cover, or the cooling component is connected to the connecting piece. A flow channel is provided inside the cooling component, and the cooling medium can flow in the flow channel to cool the battery pack when needed. The information acquisition component can be connected to the connecting piece or the top cover, and the state information of the battery cell is collected by connecting to the connecting piece or the top cover. Specifically, the stacked information acquisition component and cooling component can not only collect the temperature and voltage of the battery pack, but also realize the cooling effect on the battery pack. At the same time, the thermoelectric management device also reduces the occupation of the space inside the battery pack, and has the beneficial effect of further improving the energy density of the battery pack. Description of the Drawings

[0011] Figure 1 is a schematic connection structure diagram of a thermoelectric management device in an embodiment of the present application;

[0012] Figure 2 is a schematic connection structure diagram of another thermoelectric management device in an embodiment of the present application;

[0013] Figure 3 is a schematic connection structure diagram of yet another thermoelectric management device in an embodiment of the present application;

[0014] Figure 4 is a schematic structure diagram of a thermoelectric management device in an embodiment of the present application;

[0015] Figure 5 is a schematic structure diagram of another thermoelectric management device in an embodiment of the present application;

[0016] Figure 6 is a schematic explosion structure diagram of a thermoelectric management device in an embodiment of the present application;

[0017] Figure 7 is a schematic explosion structure diagram of another thermoelectric management device in an embodiment of the present application;

[0018] Description of the Reference Numerals:

[0019] 1. Battery cell; 11. Top cover; 12. Terminal post; 2. Connecting piece; 3. Thermoelectric management device; 31. Information acquisition component; 311. Main body; 312. First lead-out part; 313. Second lead-out part; 315. First insulating layer; 315315. Second insulating layer; 32. Cooling component; 321. First heat exchange plate; 322. Second heat exchange plate; 4. Adhesive layer. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0021] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0022] The term "parallel" in the present application not only includes the case of absolute parallelism, but also includes the generally parallel situation commonly recognized in engineering. For example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the state of -1° to 1°; at the same time, "perpendicular" not only includes the case of absolute perpendicularity, but also includes the generally perpendicular situation commonly recognized in engineering. For example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the state of 89° to 91°. Equal distance or equal angle not only includes the case of absolute equality, but also includes the generally equal situation commonly recognized in engineering, that is, there may be a certain error, such as the tolerance range is in the state of -1% to 1%.

[0023] Next, the battery pack provided by the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0024] See Figures 1 to 7, embodiments of the present application provide a battery pack, which includes a plurality of battery cells 1, a plurality of connectors 2, and a thermoelectric management device 3. The plurality of battery cells 1 are arranged in an array; the battery cell 1 includes a top cover 11 and a pole 12 disposed on the top cover 11, and the poles 12 of two adjacent battery cells 1 are electrically connected through the connector 2; the thermoelectric management device 3 includes an information acquisition component 31 and a cooling component 32. The information acquisition component 31 and the cooling component 32 are stacked and connected, and the cooling component 32 is connected to at least one of the top cover 11 and the connector 2. A flow channel is provided in the cooling component 32; wherein, the information acquisition component 31 is connected to at least one of the connector 2 and the top cover 11. Among them, the information acquisition component 31 can be used to acquire voltage information and temperature information related to the battery pack.

[0025] In practical applications, there are a plurality of battery cells 1 in the battery pack, and the plurality of battery cells 1 are arranged in an array in the battery pack. As Figure 1 shown, the battery pack has Z, Y, and X directions that intersect pairwise. The plurality of battery cells 1 can be arranged in an array along the Y and Z directions respectively. Among them, the battery cell 1 is encapsulated in the box body of the battery pack along the Z direction. The setting of the connector 2 is used to realize the electrical connection between the battery cells 1 and the battery cells 1. During the charging and discharging process of the battery pack, a large amount of heat is inevitably generated as the electrochemical reaction proceeds. In order to protect the safety of the battery pack, it is necessary to set an information acquisition component 31 to monitor the voltage and temperature of the battery pack. At the same time, in order to improve the life and performance of the battery pack, it is necessary to set a cooling component 32 to control the temperature of the battery pack.

[0026] In the embodiments of the present application, the thermoelectric management device 3 includes an information acquisition component 31 and a cooling component 32 that are stacked and connected. It can be understood that the thermoelectric management device 3 simultaneously has the functions of monitoring the state information of the battery pack and cooling the battery pack. That is to say, the integrated setting of the information acquisition component 31 and the cooling component 32 compresses the occupied space of the thermoelectric management device 3 in the Z direction of the battery pack, has the beneficial effect of improving the space utilization rate inside the battery pack, and thus improving the energy density of the battery pack.

[0027] It should be noted that the battery pack may further include a plurality of thermoelectric management devices 3. The plurality of thermoelectric management devices 31 can respectively monitor different battery cells 1. Specifically, the state information of different battery cells 1 in the battery pack can be monitored simultaneously, and the function of cooling the battery cells 1. In practical applications, monitoring different battery cells 1 can more accurately obtain the voltage and temperature of the battery cells 1 corresponding to the thermoelectric management device 3 in the battery pack.

[0028] Further, the battery cell 1 includes a top cover 11 and a terminal 12. The connecting member 2 is respectively connected to the terminals 12 of two battery cells 1 to achieve electrical connection between the two battery cells 1. Among them, the cooling component 32 is connected to the top cover 11, or the cooling component 32 is connected to the connecting member 2. A flow channel is provided in the cooling component 32, and the cooling medium can flow in the flow channel to cool down the battery pack when needed. The information acquisition component 31 can be connected to the connecting member 2 or the top cover 11, and the temperature and voltage of the battery cell 1 are acquired by connecting to the connecting member 2 or the top cover 11. Specifically, the stacked information acquisition component 31 and cooling component 32 can not only acquire the temperature and voltage of the battery pack, but also cool the battery pack. At the same time, the thermoelectric management device 3 also reduces the occupation of the space inside the battery pack, which has the beneficial effect of further improving the energy density of the battery pack.

[0029] Optionally, in the embodiment of the present application, the elastic modulus of the cooling component 32 is less than the elastic modulus of the connecting member 2.

[0030] In the embodiment of the present application, the cooling component 32 is provided to cool the battery pack, and the elastic modulus of the cooling component 32 is lower than that of the connecting member 2. That is to say, the cooling component 32 has a certain deformation ability. In practical applications, the arrangement of each component in the battery pack has a fixed position. When the remaining placement space is insufficient, the cooling component 32 with a certain deformation ability can change its own shape according to the position of the remaining placement space to be placed in the battery pack, which has the beneficial effect of reducing the occupation of the space inside the battery pack and further improving the energy density of the battery pack; in addition, the cooling component 32 has a small elastic modulus, which is convenient for the cooling component 32 to be effectively attached to the connecting member 2 or the top cover 11, thereby improving the heat transfer efficiency and the cooling effect of the battery pack.

[0031] Specifically, the material of the cooling component 32 can be an aluminum-plastic film. Compared with the traditional material of the cooling component 32, the cooling component 32 made of aluminum-plastic film can reduce the occupation of space in the setting direction. In addition, the cooling component 32 made of aluminum-plastic film also has the characteristic of being deformable. When there are many components inside the battery pack and the surplus space is irregular in shape, the cooling component 32 made of aluminum-plastic film can change with the shape of the surplus space to improve the utilization rate of the internal space of the battery pack to a greater extent. At the same time, the cooling component 32 made of aluminum-plastic film can also play a certain insulating role, which has the beneficial effect of improving the safety of the battery pack.

[0032] Optionally, in the embodiment of the present application, as Figure 4As shown, the information collection component 31 includes a main body 311, a first lead-out portion 312, and a second lead-out portion 313. The main body 311 is stacked and connected to the cooling component 32. The first lead-out portion 312 and the second lead-out portion 313 extend from the main body 311 in a direction away from the cooling component 32. The first lead-out portion 312 is connected to the connecting member 2 to collect the first information, and the second lead-out portion 313 is connected to the top cover 11 or the connecting member 2 to collect the second information. Among them, the main body 311 can be an FPC, FFC, etc. for transmitting information.

[0033] In the embodiment of the present application, the first lead-out portion 312 is arranged to collect the first information by being connected to the connecting member 2, and the second lead-out portion 313 is arranged to collect the second information by being connected to the top cover 11 or the connecting member 2. Further, the first information is voltage information. The voltage value in the current battery pack can be obtained according to the actual situation, or the voltage change value in a certain period of time can be obtained according to the actual situation, or the difference between the actual voltage value and the preset voltage value can be obtained according to the actual situation. This embodiment does not make any limitation on this. In addition, the first information can also be temperature information. The temperature value in the current battery pack can be obtained according to the actual situation, or the temperature change value in a certain period of time can be obtained according to the actual situation, or the difference between the actual temperature value and the preset temperature value can be obtained according to the actual situation. This embodiment does not make any limitation on this. The second information is temperature information. The temperature value in the current battery pack can be obtained according to the actual situation, or the temperature change value in a certain period of time can be obtained according to the actual situation, or the difference between the actual temperature value and the preset temperature value can be obtained according to the actual situation. This embodiment does not make any limitation on this. In addition, the second information can also be voltage information. The voltage value in the current battery pack can be obtained according to the actual situation, or the voltage change value in a certain period of time can be obtained according to the actual situation, or the difference between the actual voltage value and the preset voltage value can be obtained according to the actual situation. This embodiment does not make any limitation on this.

[0034] Specifically, the main body 311 is respectively connected to the first lead-out portion 312 and the second lead-out portion 313. The first lead-out portion 312 and the second lead-out portion 313 extend in a direction away from the main body 311. Among them, after the first lead-out portion 312 extends out of the main body 311, it is connected to the connecting member 2, and after the second lead-out portion 313 extends out of the main body 311, it is connected to the top cover 11 or the connecting member 2. The collection of the first information and the second information is realized through the connection with the connecting member 2 or the top cover 11.

[0035] Optionally, in the embodiment of the present application, the cooling component 32 is attached to the connecting member 2, and the information collection component 31 is arranged on the side of the cooling component 32 away from the connecting member 2.

[0036] In the embodiment of the present application, the cooling component 32 is attached to the connector 2. In actual application, a flow channel is provided in the cooling component 32, and the cooling medium flows in the flow channel to achieve a cooling effect on the cooling object. The cooling component 32 is attached to the connector 2. It can be understood that the cooling object is the connector 2. During the charging and discharging process of the battery pack, the connector 2 is connected to the pole 12, and the heat inside the winding core is transferred to the connector 2 through the pole 12, causing the temperature of the connector 2 to rise. The cooling component 32 is provided to reduce the temperature of the connector 2, thereby reducing the temperature of the battery pack. The information collection component 31 is provided in the cooling On the side away from the connector 2, it can be understood that components are respectively arranged on both sides of the cooling component 32 to achieve cooling of the components on both sides, that is to say. The above arrangement can maximize the cooling effect of the cooling component 32 on the one hand, and separate the connector 2 and the information acquisition component 31 through the cooling component 32 on the other hand, so as to avoid the temperature of the connector 2 and the temperature of the information acquisition component 31 from affecting each other, which has the beneficial effect of improving the performance of the battery pack. In addition, the battery cell 1 can generally also include an explosion-proof valve, which can be arranged on the top cover. At this time, the cooling component 32 and the information acquisition component 31 are stacked, so that the information acquisition component 31 can be arranged away from the explosion-proof valve, thereby avoiding the high-temperature substance from damaging the information acquisition component 31 when the battery cell 1 has a valve spray, so as to reduce the probability of heat spread caused by the loss of information acquisition when the battery pack has thermal runaway, thereby achieving the effect of improving the safety of the battery pack.

[0037] Optionally, in some other embodiments, the cooling component 32 is attached to the top cover 11 , and the information collection component 31 is disposed on a side of the cooling component 32 facing away from the top cover 11 .

[0038] In other embodiments, the cooling component 32 is attached to the top cover 11. In actual applications, a flow channel is provided in the cooling component 32, and a cooling medium flows in the flow channel to cool the cooling object. The cooling component 32 is attached to the top cover 11. It can be understood that the cooling object is the top cover 11. During the charging and discharging process of the battery pack, the temperature in the winding core is transferred to the top cover 11, causing the temperature to rise. The cooling component 32 is provided to reduce the temperature of the top cover 11, thereby reducing the temperature of the battery pack. The information collection component 31 is provided in the cooling On the side away from the top cover 11, it can be understood that components are respectively arranged on both sides of the cooling component 32 to achieve cooling of the components on both sides, that is to say. The above arrangement can maximize the cooling effect of the cooling component 32 on the one hand, and on the other hand, the top cover 11 and the information acquisition component 31 are separated by the cooling component 32, thereby avoiding the mutual influence between the temperature of the top cover 11 and the temperature of the information acquisition component 31, which has the beneficial effect of improving the performance of the battery pack. It should be noted that at this time, the explosion-proof valve of the battery cell 1 can be located on a different side of the battery cell 1 from the thermal management device 3 to avoid the high-temperature substances erupted from the explosion-proof valve from damaging the information acquisition component 31.

[0039] In other embodiments, the cooling component 32 can be connected to the connector 2 and also fit with the top cover. The above arrangement can enable the cooling component 32 to cool both the connector 2 and the top cover at the same time.

[0040] Optionally, in the embodiment of the present application, Figure 6 As shown, the cooling component 32 includes a first heat exchange plate 321 and a second heat exchange plate 322, which are connected to form a flow channel for accommodating a cooling medium; wherein one of the first heat exchange plate 321 and the second heat exchange plate 322 is attached to at least one of the top cover 11 and the connecting member 2, and the other of the first heat exchange plate 321 and the second heat exchange plate 322 is connected to the information collection component 31.

[0041] In the embodiment of the present application, the first heat exchange plate 321 and the second heat exchange plate 322 cooperate to enclose a sealed cooling assembly 32, and the first heat exchange plate 321 and the second heat exchange plate 322 also enclose a flow channel, which is used to accommodate the flow of a cooling medium. In practical applications, the battery pack is cooled by the cooling medium in the flow channel. Among them, one of the first heat exchange plate 321 and the second heat exchange plate 322 can be attached to the top cover 11 to achieve heat exchange with the top cover 11, and one of the first heat exchange plate 321 and the second heat exchange plate 322 can also be attached to the connector 2 to achieve heat exchange with the connector 2. The other of the first heat exchange plate 321 and the second heat exchange plate 322 is connected to the information acquisition assembly 31 to achieve heat exchange with the information acquisition assembly 31.

[0042] It can be understood that the two sides of the cooling component 32 are the top cover 11 and the information collection component 31, or the connecting member 2 and the information collection component 31, respectively. On the one hand, the cooling component 32 can cool the top cover 11 and the information collection component 31, or the connecting member 2 and the information collection component 31 at the same time, and on the other hand, it can also achieve the separation between the top cover 11 and the information collection component 31, or the connecting member 2 and the information collection component 31, which has the beneficial effect of further improving the cooling effect and avoiding the temperature mutual influence between the two unseparated components.

[0043] It should be noted that the cooling medium can be a liquid or a gas, and this embodiment does not make any limitation thereto.

[0044] Optionally, in the embodiments of the present application, the material of at least one of the first heat exchange plate 321 and the second heat exchange plate 322 is an insulating material.

[0045] In the embodiments of the present application, both the first heat exchange plate 321 and the second heat exchange plate 322 are clamped between the top cover 11 and the information collection component 31, or between the connecting member 2 and the information collection component 31. In order to further improve the safety of the components inside the battery pack, at least one of the first heat exchange plate 321 and the second heat exchange plate 322 is made of an insulating material, which has the beneficial effect of avoiding short circuits caused by the contact between the first heat exchange plate 321 and the connecting member 2 or the information collection component 31, or the contact between the second heat exchange plate 322 and the connecting member 2 or the information collection component 31.

[0046] Specifically, the insulating material can be one of polypropylene, polyimide, polyamide, etc., and this embodiment does not make any limitation thereto. In addition, the first heat exchange plate 321 and the second heat exchange plate 322 can be made of the same insulating material or different insulating materials, and this embodiment does not make any limitation thereto.

[0047] Optionally, in some other embodiments, the first heat exchange plate 321 includes a first body portion and a first insulating portion, and the first insulating portion covers the first body portion; and / or, the second heat exchange plate 322 includes a second body portion and a second insulating portion, and the second insulating portion covers the second body portion.

[0048] In the embodiments of the present application, the first body portion and the second body portion are arranged to enclose a flow channel, thereby providing an accommodation space for the flow of the cooling medium. The first insulating portion and the second insulating portion are arranged to insulate the first body portion and the second body portion, so as to avoid short circuits caused by the contact between the cooling component 32 and the connecting member 2 or the information collection component 31.

[0049] Furthermore, the minimum covering area of the first insulating portion is greater than or equal to the contact area between the first body portion and the connecting member 2, or the minimum covering area of the first insulating portion is greater than or equal to the contact area between the first body portion and the information collection component 31. Similarly, the minimum covering area of the second insulating portion is greater than or equal to the contact area between the second body portion and the connecting member 2, or the minimum covering area of the second insulating portion is greater than or equal to the contact area between the second body portion and the information collection component 31.

[0050] Specifically, the materials of the first body part and the second body part are metal materials. The first insulating part covers the first body part, and the second insulating part covers the second body part. In practical applications, the first insulating part can be in contact with the polyamide connecting piece 2 or the information collection component 31, and the second insulating part can also be in contact with the connecting piece 2 or the information collection component 31.

[0051] It should be noted that the first insulating part and the second insulating part can be respectively bonded or crimped to the first body part and the second body part, as long as the outer surfaces of the first body part and the second body part are covered. This embodiment does not make any limitation in this regard.

[0052] Optionally, in the embodiment of the present application, the thermoelectric management device 3 further includes an adhesive layer 4. One side of the adhesive layer 4 is bonded to the information collection component 31, and the other side of the adhesive layer 4 is bonded to the cooling component 32.

[0053] In the embodiment of the present application, the adhesive layer 4 is provided to realize the connection between the cooling component 32 and the information collection component 31. In practical applications, the information collection component 31 and the first heat exchange plate 321 are respectively arranged on both sides of the adhesive layer 4, or the information collection component 31 and the second heat exchange plate 322 are respectively arranged on both sides of the adhesive layer 4. The adhesive layer 4 can realize the fixed connection between the cooling component 32 and the information collection component 31, and at the same time, it can also improve the cooling effect of the cooling component 32 on the information collection component 31 through heat conduction.

[0054] Optionally, in the embodiment of the present application, as Figure 7 shown, the information collection component 31 further includes a first insulating layer 314 and a second insulating layer 315 which are oppositely arranged. The main body 311 is clamped between the first insulating layer 314 and the second insulating layer 315. At least part of the first lead-out part 312 and the second lead-out part 313 is exposed outside the first insulating layer 314 and the second insulating layer 315; the first insulating layer 314 or the second insulating layer 315 is attached to the cooling component 32.

[0055] In the embodiment of the present application, the first insulating layer 314 and the second insulating layer 315 are clamped on both sides of the main body 313, which has the beneficial effect of avoiding short circuits caused by contact or connection between the main body 313 and unnecessary components, thus preventing battery pack safety problems.

[0056] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit and scope protected by the claims of the present application, can still make many forms, all of which fall within the protection scope of the present application.

Claims

1. A battery pack, characterized in that: It comprises a plurality of battery cells (1), a plurality of connecting members (2) and a thermoelectric management device (3), wherein the plurality of battery cells (1) are arranged in an array; The battery cell (1) comprises a top cover (11) and a pole (12) arranged on the top cover (11), and the poles (12) of two adjacent battery cells (1) are electrically connected via the connecting member (2); The thermal power management device (3) comprises an information collection component (31) and a cooling component (32), wherein the information collection component (31) and the cooling component (32) are stacked and connected, the cooling component (32) is connected to at least one of the top cover (11) and the connecting member (2), and a flow channel is provided in the cooling component (32); Wherein, the information collection component (31) is connected to at least one of the connecting member (2) and the top cover (11).

2. The battery pack according to claim 1, characterized in that: The elastic modulus of the cooling component (32) is smaller than the elastic modulus of the connecting member (2).

3. The battery pack according to claim 1, characterized in that: The information collection component (31) comprises a main body (311), a first lead-out portion (312) and a second lead-out portion (313); the main body (311) is connected to the cooling component (32) in a stacked manner; the first lead-out portion (312) and the second lead-out portion (313) extend from the main body (311) in a direction away from the cooling component (32); the first lead-out portion (312) is connected to the connecting member (2) to collect first information; and the second lead-out portion (313) is connected to the top cover (11) or the connecting member (2) to collect second information.

4. The battery pack according to claim 1, characterized in that: The cooling component (32) is attached to the connecting piece (2), and the information collection component (31) is arranged on a side of the cooling component (32) facing away from the connecting piece (2).

5. The battery pack according to claim 1, characterized in that: The cooling component (32) is attached to the top cover (11), and the information collection component (31) is arranged on a side of the cooling component (32) facing away from the top cover (11).

6. The battery pack according to any one of claims 1 to 5, characterized in that: The cooling assembly (32) comprises a first heat exchange plate (321) and a second heat exchange plate (322), wherein the first heat exchange plate (321) and the second heat exchange plate (322) are connected to enclose the flow channel, and the flow channel is used to accommodate a cooling medium; One of the first heat exchange plate (321) and the second heat exchange plate (322) is attached to at least one of the top cover (11) and the connecting member (2), and the other of the first heat exchange plate (321) and the second heat exchange plate (322) is connected to the information acquisition component (31).

7. The battery pack according to claim 6, characterized in that: At least one of the first heat exchange plate (321) and the second heat exchange plate (322) is made of insulating material.

8. The battery pack according to claim 6, characterized in that: The first heat exchange plate (321) comprises a first body portion and a first insulating portion, wherein the first insulating portion covers the first body portion; And / or, the second heat exchange plate (322) comprises a second main body portion and a second insulating portion, and the second insulating portion covers the second main body portion.

9. The battery pack according to claim 1, characterized in that: The thermal power management device (3) further comprises an adhesive layer (4), one side of the adhesive layer (4) being bonded to the information collection component (31), and the other side of the adhesive layer (4) being bonded to the cooling component (32).

10. The battery pack according to claim 3, characterized in that: The information acquisition component (31) further comprises a first insulating layer (314) and a second insulating layer (315) arranged opposite to each other, the main body (311) is sandwiched between the first insulating layer (314) and the second insulating layer (315), and at least parts of the first lead-out portion (312) and the second lead-out portion (313) are exposed outside the first insulating layer (314) and the second insulating layer (315); The first insulating layer (314) or the second insulating layer (315) is attached to the cooling component (32).

Images