Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment, and relates to the technical field of batteries, the battery pack comprises a plurality of busbars, a plurality of battery monomers, an elastic sealing piece and a sealing heat conduction layer, each battery monomer comprises a top cover and a pole arranged on the top cover, and the busbars are connected to the poles of any two adjacent battery monomers; the elastic sealing element covers the top covers of the plurality of battery monomers and is arranged on the peripheries of the plurality of busbars; and at least part of the sealing heat conduction layer is filled in gaps between the elastic sealing piece and the plurality of busbars. According to the battery pack and the electric equipment, the sealing performance of the battery pack can be improved, liquid is prevented from being in contact with the busbar, and the probability of safety accidents is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] During the use of the battery pack, there will be a need for fast charging, which will cause the battery temperature to rise rapidly, especially at the battery poles and the battery bus. Based on this, in the prior art, thermal management is achieved by directly contacting the battery bus with a cold plate. However, direct contact of the cold plate may cause liquid leakage and liquid contact with the bus, causing a short circuit in the bus and causing a safety accident. Utility Model Content

[0003] In order to solve the above technical problems, the embodiments of the present application provide a battery pack and an electrical device, which can improve the sealing performance of the battery pack, prevent liquid from contacting the bus, and reduce the probability of safety accidents.

[0004] In a first aspect, a battery pack is provided, comprising:

[0005] Multiple busbars;

[0006] A plurality of battery cells, each of which comprises a top cover and a pole arranged on the top cover, and the poles of any two adjacent battery cells are connected to the busbar;

[0007] An elastic seal covering the top covers of the plurality of battery cells, and the elastic seal is arranged on the outer periphery of the plurality of bus bars;

[0008] A sealing heat-conducting layer is provided, wherein at least a portion of the sealing heat-conducting layer is filled into a gap between the elastic sealing member and the plurality of bus bars.

[0009] According to a first aspect of the present application, the plurality of battery cells are distributed along a first preset direction, and the distance between the relatively distant sides of the poles of two adjacent battery cells in the first preset direction is greater than the length of the bus in the first preset direction.

[0010] According to a first aspect of the present application, the length of the pole of the battery cell in a second preset direction is greater than the length of the busbar in the second preset direction; wherein the second preset direction represents the length direction of the battery cell.

[0011] According to the first aspect of the present application, the battery pack further includes:

[0012] A cold plate pressed against the elastic sealing member;

[0013] Wherein, at least a portion of the sealed heat-conducting layer is filled into the gap between the cold plate and the busbar.

[0014] According to the first aspect of the present application, the compression rate of the elastic seal is 10%-30%, and the height of the elastic seal after being pressed by the cold plate is greater than the height of the busbar.

[0015] According to the first aspect of the present application, the elastic sealing member is provided with a plurality of mounting holes, each of the mounting holes contains the bus bar, and the sealing heat-conductive layer covers the bus bar and fills the mounting holes.

[0016] According to the first aspect of the present application, the battery pack further includes:

[0017] A first circuit board, the first circuit board is arranged between the top covers of the plurality of battery cells and the elastic sealing member, the first circuit board is provided with a temperature collecting member, and the temperature collecting member is used to collect the top cover temperature of the battery cells;

[0018] The elastic sealing member is recessed toward the first circuit board and is provided with an accommodation cavity for accommodating the temperature collecting member.

[0019] According to the first aspect of the present application, the battery pack further includes:

[0020] a second circuit board, the second circuit board being arranged on a side of the elastic seal away from the battery cell, and the side of the second circuit board away from the elastic seal being covered with a portion of the sealing heat-conducting layer;

[0021] The second circuit board is connected to a voltage collection member, the voltage collection member is used to collect the voltage of the battery cell, the elastic sealing member is provided with a first groove and a second groove which are interconnected, the first groove is used to accommodate the second circuit board, and the second groove is used to accommodate the voltage collection member;

[0022] The first circuit board and the second circuit board are connected via a socket connector.

[0023] According to the first aspect of the present application, the elastic sealing member is a thermal insulation foam, and the sealing heat-conducting layer is a heat-conducting structural adhesive.

[0024] In a second aspect, an electrical device is also provided, comprising the battery pack as described in the previous embodiment.

[0025] The battery pack and electrical equipment provided in the embodiments of the present application include multiple bus bars, multiple battery cells, elastic seals and a sealed heat-conductive layer. The poles of any two adjacent battery cells are connected to a bus bar. The elastic seal covers the top covers of the multiple battery cells and is provided with multiple bus bars on the periphery of the elastic seal. The elastic seal can block liquid from contacting the bus bar, prevent the bus bar from short-circuiting, and reduce the probability of safety accidents. In addition, the sealed heat-conductive layer at least partially fills the gap between the elastic seal and the multiple bus bars. The sealed heat-conductive layer can prevent liquid from contacting the bus bar through the gap between the elastic seal and the multiple bus bars, further improving the sealing performance, preventing the bus bar from short-circuiting, and reducing the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0027] Figure 1 A schematic diagram of the structure of a battery pack provided as an exemplary embodiment of the present application.

[0028] Figure 2 An exploded view of a battery pack provided as an exemplary embodiment of the present application.

[0029] Figure 3 A partial cross-sectional view of a battery pack provided according to an exemplary embodiment of the present application.

[0030] Figure 4 A schematic diagram of the structure of a battery pack provided by an exemplary embodiment of the present application without a cold plate.

[0031] Figure 5 A schematic structural diagram of a battery pack provided in accordance with an exemplary embodiment of the present application without a cold plate and a sealed heat-conducting layer.

[0032] Figure 6 for Figure 2 A magnified schematic diagram of center A.

[0033] Figure 7 A schematic structural diagram of a first circuit board, an elastic seal, and a second circuit board provided for an exemplary embodiment of the present application.

[0034] Figure 8 for Figure 7 A magnified schematic diagram of point B in the middle.

[0035] Figure numerals: 100 - battery pack; 110 - battery cell; 120 - bus; 130 - elastic sealing member; 131 - mounting hole; 132 - first groove; 133 - second groove; 140 - sealing heat conductive layer; 150 - cold plate; 161 - first circuit board; 162 - second circuit board; 163 - socket connector; 164 - accommodating cavity; 170 - temperature collecting member. DETAILED DESCRIPTION

[0036] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0037] Figure 1 A schematic diagram of the structure of a battery pack provided as an exemplary embodiment of the present application. Figure 2 An exploded view of a battery pack provided as an exemplary embodiment of the present application. Figure 3 A partial cross-sectional view of a battery pack provided by an exemplary embodiment of the present application. Figure 4 A schematic diagram of the structure of a battery pack provided by an exemplary embodiment of the present application without a cold plate. Figure 5 A schematic diagram of the structure of a battery pack provided by an exemplary embodiment of the present application without a cold plate and a sealed heat-conducting layer. Figures 1 to 5 As shown, the battery pack 100 provided in the embodiment of the present application may include a plurality of bus bars 120 and a plurality of battery cells 110, each battery cell 110 includes a top cover and a pole arranged on the top cover, and the poles of any two adjacent battery cells 110 are connected to a bus bar 120, and the bus bar 120 can transfer current between two adjacent poles.

[0038] like Figures 1 to 5 As shown, the battery pack 100 may further include an elastic seal 130, which covers the top covers of multiple battery cells 110, and is arranged on the periphery of multiple bus bars 120. On the one hand, the elastic seal 130 can improve the overall sealing performance of the battery pack 100, prevent liquid from contacting the top covers of the battery cells 110 and the poles on the top covers of the battery cells 110, prevent short circuits, and reduce the probability of safety accidents. On the other hand, the elastic seal 130 can play the role of carrying wiring harnesses and electrical components, and can replace the plastic wiring harness plates in related technologies, which can effectively reduce weight and thus reduce production costs.

[0039] like Figures 1 to 5As shown, the battery pack 100 may further include a sealing heat-conducting layer 140, at least part of which is filled into the gap between the elastic seal 130 and the plurality of busbars 120. In this way, on the one hand, the sealing heat-conducting layer 140 can prevent the liquid from contacting the pole through the gap between the elastic seal 130 and the plurality of busbars 120, which can further improve the sealing performance and prevent the battery cell from short-circuiting; on the other hand, the sealing heat-conducting layer 140 can achieve heat conduction, transferring the heat generated by the busbar 120 during operation to the cold plate 150 (described later), preventing the operating temperature of the busbar 120 and the pole from being too high.

[0040] The battery pack 100 provided in the embodiment of the present application includes a plurality of bus bars 120, a plurality of battery cells 110, an elastic seal 130 and a sealing heat-conducting layer 140. The poles of any two adjacent battery cells 110 are connected with the bus bars 120. By making the elastic seal 130 cover the top covers of the plurality of battery cells 110 and providing the elastic seal 130 with the periphery of the plurality of bus bars 120, the elastic seal 130 can prevent liquid from contacting the top covers of the battery cells 110, thereby preventing battery short circuit and reducing the probability of safety accidents. In addition, by making at least a portion of the sealing heat-conducting layer 140 fill the gap between the elastic seal 130 and the plurality of bus bars 120, the sealing heat-conducting layer 140 can prevent liquid from contacting the poles of the battery cells through the gap between the elastic seal 130 and the plurality of bus bars 120, thereby further improving the sealing performance, preventing the poles from short circuit and reducing the probability of safety accidents.

[0041] like Figures 1 to 5 As shown, the battery pack 100 may further include a cold plate 150, which is in contact with the elastic seal 130. Under the gravity of the cold plate 150 itself and / or the preload force received by the cold plate 150, the cold plate 150 may apply pressure to the elastic seal 130. After compression, the elastic seal 130 reduces the distance from the bus 120 or increases the contact area with the bus 120, so that the elastic seal 130 can surround or fill the peripheral area of ​​the bus 120, thereby further improving the overall sealing performance of the battery pack 100.

[0042] In one embodiment, a portion of the sealed heat-conducting layer 140 is filled into the gap between the elastic seal 130 and the plurality of bus bars 120 to improve the sealing performance; another portion of the sealed heat-conducting layer 140 is filled into the gap between the cold plate 150 and the bus bars 120 to facilitate the sealed heat-conducting layer 140 to transfer the heat generated by the bus bars 120 to the cold plate 150. The cold plate 150 absorbs the heat to ensure that the bus bars 120 are within a normal temperature range and at the same time ensure that the temperatures of different parts of the bus bars 120 are more uniform to avoid excessive temperatures in some parts of the bus bars 120.

[0043] In one embodiment, the compression rate of the elastic seal 130 is 10%-30%, thereby ensuring the strength of the elastic seal 130. At the same time, the height of the elastic seal 130 after being pressed by the cold plate 150 is greater than the height of the bus 120, so that the elastic seal 130 can still block the external liquid from passing through the elastic seal 130 and contacting the top cover of the battery cell 110 when being pressed by the cold plate 150, thereby preventing the battery cell from short-circuiting; at the same time, it prevents the cold plate 150 from directly pressing the bus 120 and causing damage to the bus 120; in addition, the elastic seal 130 after being pressed by the cold plate 150 can fill a larger range, which can further improve the sealing performance.

[0044] It should be understood that the compression rate of the elastic seal 130 can be understood as the ratio of the reduced height of the elastic seal 130 after being compressed to the original height.

[0045] In one embodiment, the compression rate of the elastic sealing member 130 may be 10%, 20%, 30%, etc.

[0046] In one embodiment, the elastic seal 130 is a heat-insulating foam, which can provide good sealing performance on the one hand, and on the other hand, the good heat-insulating effect can effectively isolate the top cover of the battery cell 110 and the cold plate 150, thereby avoiding affecting the temperature collection of the top cover of the battery cell 110 and the accuracy of the temperature collection data.

[0047] In one embodiment, the sealing heat-conducting layer 140 is a heat-conducting structural adhesive, which not only has better thermal conductivity and waterproof effects, but also has a good fixing effect. It can fill the gap between the elastic seal 130 and the multiple bus bars 120 and the gap between the cold plate 150 and the bus bar 120 for a long time, and has a longer service life.

[0048] In one embodiment, the surface of the cold plate 150 is sprayed with insulating paint, which can achieve insulation between the cold plate 150 and the bus bar 120 to avoid short circuit.

[0049] like Figures 1 to 5 As shown, a plurality of battery cells 110 are arranged along a first preset direction ( Figure 5The distance between the two sides of the poles of two adjacent battery cells 110 that are relatively far away from each other in the first preset direction is greater than the length of the bus 120 in the first preset direction. In this way, part of the poles of two adjacent battery cells 110 will not be covered by the bus 120 in the first preset direction, and the area of ​​the adjacent poles exposed outside the bus 120 can form the gap between the elastic sealing member 130 and the bus 120, and the bus 120 cannot prevent the sealing heat-conducting layer 140 from filling the area of ​​the poles exposed outside the bus 120, which can improve the overall sealing performance and facilitate the sealing heat-conducting layer 140 to directly contact the poles, thereby improving the cooling effect on the poles.

[0050] like Figures 1 to 5 As shown, the pole of the battery cell 110 is in the second preset direction ( Figure 5 The length of the busbar 120 in the second preset direction) is greater than the length of the busbar 120 in the second preset direction. In this way, part of the pole of the battery cell 110 will not be covered by the busbar 120 in the second preset direction, and the area of ​​the pole exposed outside the busbar 120 can form a gap between the elastic seal 130 and the busbar 120, and the busbar 120 cannot block the sealing heat-conducting layer 140 from filling the area of ​​the pole exposed outside the busbar 120, which can improve the overall sealing performance, and at the same time facilitate the sealing heat-conducting layer 140 to directly contact the pole, thereby improving the cooling effect on the pole.

[0051] It should be noted that the second preset direction can also be understood as the length direction of the battery cell 110 .

[0052] In one embodiment, the first preset direction and the second preset direction are perpendicular to each other. Figure 6 for Figure 2 The enlarged schematic diagram of A in the figure. Figure 6 As shown, the elastic seal 130 is provided with a plurality of mounting holes 131, each mounting hole 131 contains a busbar 120, and the size setting of the busbar 120 and the pole is also convenient for installing the busbar 120 in the mounting hole 131, and convenient for fixing the busbar 120 and the pole of the battery cell 110, and avoiding the problem of inaccurate installation position caused by the busbar 120 blocking the pole. At the same time, the elastic seal 130 can isolate two adjacent busbars 120 to avoid short circuit caused by mutual contact.

[0053] It should be noted that the sealed heat-conductive layer 140 covers the entire surface of the bus 120 away from the pole, and can be used to transfer the heat generated by the bus 120. At the same time, the sealed heat-conductive layer 140 fills the mounting hole 131. The sealed heat-conductive layer 140 can fill the gap between the bus 120 and the inner wall of the mounting hole 131. The sealed heat-conductive layer 140 can be integrally formed on the bus 120 and between the gap between the bus 120 and the inner wall of the mounting hole 131, thereby effectively improving the sealing performance, isolating the bus 120 and the cold plate 150, and preventing liquid from contacting the bus 120.

[0054] In one embodiment, the number of the mounting holes 131 is the same as the number of the bus bars 120 and corresponds one to one.

[0055] Figure 7 A schematic structural diagram of a first circuit board, an elastic seal, and a second circuit board provided for an exemplary embodiment of the present application. Figure 8 for Figure 7 The enlarged schematic diagram of point B in the figure. Figure 2 , Figure 3 , Figure 7 as well as Figure 8 As shown, the battery pack 100 may further include a first circuit board 161, which is disposed between the top cover of the plurality of battery cells 110 and the elastic seal 130, and the elastic seal 130 is recessed on one side of the first circuit board 161 and is provided with a receiving cavity 164, which may be used to accommodate a temperature collecting component 170, and the temperature collecting component 170 is disposed on the first circuit board 161.

[0056] Specifically, in practical applications, the temperature collection component 170 can be used to collect the temperature of the top cover of the battery cell 110. The temperature collection component 170 can transmit a signal representing the top cover temperature to the monitoring component through the first circuit board 161, so that the monitoring component can monitor the temperature of the top cover in real time.

[0057] It should be noted that after the elastic seal 130 is pressed by the cold plate 150, the elastic seal 130 abuts against the temperature collection member 170, and the elastic seal 130 can limit the temperature collection member 170 to improve the assembly stability of the temperature collection member 170. At the same time, the elastic seal 130 can also abut against the temperature collection member 170 to increase the contact area between the temperature collection member 170 and the top cover of the battery cell 110 to ensure the detection accuracy. In addition, a receiving cavity 164 for accommodating the temperature collection member 170 is provided on the elastic seal 130, which can reduce the space occupied by the temperature collection member 170 in the height direction of the battery pack 100 and improve the space utilization rate inside the battery pack 100.

[0058] In one embodiment, the temperature collecting member 170 may be adhered to the top cover of the battery cell 110 by means of structural adhesive to improve the connection stability.

[0059] like Figure 2 , Figure 3 , Figure 7 as well as Figure 8 As shown, the battery pack 100 may further include a second circuit board 162, which is disposed on a side of the elastic seal 130 away from the battery cell 110 (i.e., the first circuit board 161 and the second circuit board 162 are disposed on both sides of the elastic seal 130), and a side of the second circuit board 162 away from the elastic seal 130 is covered with a portion of the sealing heat-conductive layer 140, which can prevent external liquid from contacting the second circuit board 162.

[0060] It should be noted that if Figures 6 to 8 As shown, the second circuit board 162 is connected to a voltage collection member (not shown in the figure), which can be a conductive connector, and can be connected to the bus 120. The elastic seal 130 is provided with a first groove 132 and a second groove 133 that are connected to each other. The first groove 132 can be used to accommodate the second circuit board 162, and the second groove 133 can be used to accommodate the voltage collection member. The second groove 133 can connect the first groove 132 and the mounting hole 131, so as to facilitate the voltage collection member to connect the bus 120 and the second circuit board 162 accommodated in the mounting hole 131. In this way, the space occupied by the second circuit board 162 and the voltage collection member in the height direction of the battery pack 100 can be reduced, effectively improving the space utilization rate inside the battery pack 100, and at the same time protecting the second circuit board 162 from direct contact with the cold plate 150.

[0061] Specifically, the voltage collector can be used to collect the voltage of the battery cell 110 . The voltage collector can transmit a signal representing the voltage of the battery cell 110 to the monitoring component through the second circuit board 162 , so that the monitoring component can monitor the voltage of the battery cell 110 in real time.

[0062] It should be noted that the voltage parameters and temperature parameters are collected separately using the voltage collection component and the temperature collection component 170, respectively, which can avoid mutual interference during the collection process and improve the accuracy of the voltage and temperature collection data. Furthermore, the voltage collection component and the temperature collection component 170 are staggered to increase the distance between the voltage collection component and the temperature collection component 170, so that the influence of the voltage collection component on the temperature collection process can be avoided, and the accuracy of the data collected by both can be further improved.

[0063] like Figure 7 and Figure 8As shown, the first circuit board 161 and the second circuit board 162 are connected by a socket connector 163, which facilitates the management of the first circuit board 161 and the second circuit board 162. The socket connector 163 can be used to connect other components. In actual applications, the first circuit board 161 and the second circuit board 162 can respectively transmit temperature acquisition data and voltage acquisition data to the socket connector 163, and then transmit them to the monitoring component through the socket connector 163 to monitor the temperature information and voltage information of the battery cell.

[0064] An embodiment of the present application also provides an electrical device, which may include the battery pack 100 of the aforementioned embodiment and has all the functions of the battery pack 100. The beneficial effects of the electrical device can refer to the beneficial effects of the aforementioned battery pack 100.

[0065] In one embodiment, the electrical device may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, electric tools, energy storage devices, amusement equipment, elevators and lifting equipment, etc.

[0066] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0067] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0068] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0069] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0070] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A battery pack, characterized in that: include: A plurality of bus bars (120); A plurality of battery cells (110), wherein the battery cells (110) comprise a top cover and a pole arranged on the top cover, and the poles of any two adjacent battery cells (110) are connected to the busbar (120); An elastic sealing member (130) covers the top covers of the plurality of battery cells (110), and the elastic sealing member (130) is arranged on the outer periphery of the plurality of bus bars (120); A sealing heat-conducting layer (140) is provided, wherein at least a portion of the sealing heat-conducting layer (140) is filled into a gap between the elastic sealing member (130) and the plurality of bus bars (120).

2. The battery pack according to claim 1, characterized in that: The plurality of battery cells (110) are distributed along a first preset direction, and the distance between two relatively distant sides of the poles of two adjacent battery cells (110) in the first preset direction is greater than the length of the busbar (120) in the first preset direction.

3. The battery pack according to claim 1, characterized in that: The length of the pole of the battery cell (110) in a second preset direction is greater than the length of the busbar (120) in the second preset direction; wherein the second preset direction represents the length direction of the battery cell (110).

4. The battery pack according to claim 1, characterized in that: The battery pack further comprises: A cold plate (150) pressed against the elastic sealing member (130); Wherein, at least a portion of the sealed heat-conducting layer (140) is filled into the gap between the cold plate (150) and the busbar (120).

5. The battery pack according to claim 4, characterized in that: The compression rate of the elastic sealing member (130) is 10%-30%, and the height of the elastic sealing member (130) after being pressed by the cold plate (150) is greater than the height of the busbar (120).

6. The battery pack according to claim 1, characterized in that: The elastic sealing component (130) is provided with a plurality of mounting holes (131), each mounting hole (131) contains the bus bar (120), and the sealing heat-conducting layer (140) covers the bus bar (120) and fills the mounting holes (131).

7. The battery pack according to claim 1, characterized in that: The battery pack further comprises: a first circuit board (161), the first circuit board (161) being arranged between the top covers of the plurality of battery cells (110) and the elastic sealing component (130), the first circuit board (161) being provided with a temperature collecting component (170), the temperature collecting component (170) being used to collect the top cover temperature of the battery cells (110); The elastic sealing member (130) is recessed toward the first circuit board (161) and is provided with a receiving cavity (164) for receiving the temperature collecting member (170).

8. The battery pack according to claim 7, characterized in that: The battery pack further comprises: a second circuit board (162), the second circuit board (162) being arranged on a side of the elastic seal (130) away from the battery cell (110), and a portion of the sealing heat-conducting layer (140) being covered on the side of the second circuit board (162) away from the elastic seal (130); The second circuit board (162) is connected to a voltage collection component, the voltage collection component is used to collect the voltage of the battery cell (110), the elastic sealing component (130) is provided with a first groove (132) and a second groove (133) which are connected to each other, the first groove (132) is used to accommodate the second circuit board (162), and the second groove (133) is used to accommodate the voltage collection component; The first circuit board (161) and the second circuit board (162) are connected via a socket connector (163).

9. The battery pack according to any one of claims 1 to 8, characterized in that: The elastic sealing element (130) is a heat-insulating foam, and the sealing heat-conducting layer (140) is a heat-conducting structural adhesive.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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