Battery pack and energy storage equipment

Abstract

The utility model provides a battery pack and energy storage equipment. The battery pack comprises a top shell, a battery cell assembly, a circuit board assembly and a sealing element, the top shell is provided with an exposing hole. The battery cell assembly comprises a battery cell support. The circuit board assembly comprises a circuit board main body and a connector, the connector is fixed on the circuit board main body, the circuit board main body is assembled on the battery cell bracket, and the connector is assembled on the top shell and is positioned in the exposing hole. And the sealing element is extruded by the connector and the top shell to seal communication between the exposure hole and the interior of the top shell. When the battery pack is assembled, the connector and the top shell can be assembled at first, then the circuit board main body and the battery cell support are assembled, and the circuit board main body can move relative to the battery cell support, so that even if the connector needs to move during assembly, the circuit board main body can also naturally move along with the connector; therefore, large assembling stress between the circuit board main body and the connector is avoided, the connector and the top shell are ensured to be assembled in place, the connector and the top shell press the sealing ring tightly, and the sealing performance of the exposed hole is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a battery pack and an energy storage device. BACKGROUND

[0002] The current energy storage power supply can realize capacity expansion by connecting an external battery pack. The external battery pack usually includes a top shell, a circuit board, a connector, a cell support, etc. Since the connector needs to protrude out of the top shell, a sealing ring is usually arranged between the connector and the top shell to prevent water from entering the gap between the connector and the top shell.

[0003] In the related art, the connector can be welded on the circuit board. When assembling the battery pack, the circuit board and the cell support are usually assembled first, and then the top shell is assembled. The assembled top shell and the connector squeeze the sealing ring. However, when assembling the top shell, due to factors such as assembly tolerance, the connector may need to be displaced relative to the circuit board to be successfully assembled to the top shell. In this way, assembly stress is easily generated between the connector and the circuit board, for example, the circuit board generates a pulling force that hinders the assembly of the connector, which causes the connector and the top shell to fail to compress the sealing ring, resulting in a sealing failure between the connector and the circuit board. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a battery pack and an energy storage device capable of reducing assembly stress to improve sealing.

[0005] In an embodiment of the present application, a battery pack is provided, which includes a top shell, a cell assembly, a circuit board assembly, and a sealing member. The top shell is provided with an exposed hole. The cell assembly is arranged in the top shell and includes a cell support. The circuit board assembly includes a circuit board body and a connector, and the connector is fixed to the circuit board body. The circuit board body is assembled to the cell support and located in the top shell, and the connector is assembled to the top shell and at least partially located in the exposed hole. The sealing member is arranged between the top shell and the connector, and the sealing member is squeezed by the connector and the top shell to seal the communication between the exposed hole and the inside of the top shell. When assembling the connector and the top shell, the circuit board body is configured to be supported on the cell support and movable relative to the cell support, and assembled with the cell support after the connector and the top shell are assembled.

[0006] The battery pack provided by the present application can first assemble the connector and the top shell, and then assemble the circuit board body and the cell support. Since the circuit board body can move relative to the cell support when assembling the connector and the top shell, even if the connector needs to be displaced during assembly, the circuit board body can naturally displace with the connector, avoiding the generation of a large assembly stress between the circuit board body and the connector, thereby ensuring that the connector and the top shell are assembled in place, and then the connector and the top shell compress the sealing ring to ensure the sealing of the exposed hole.

[0007] In some embodiments, the connector has a first positioning rib and a second positioning rib, the first positioning rib extends along a first direction, the second positioning rib extends along a second direction, the first direction is perpendicular to the second direction, the top shell has a first positioning groove and a second positioning groove, the first positioning rib is inserted into the first positioning groove, a groove wall of the first positioning groove limits the first positioning rib along the second direction, the second positioning rib is inserted into the second positioning groove, a groove wall of the second positioning groove limits the second positioning rib along the first direction.

[0008] In some embodiments, the top shell has a first limiting rib and a second limiting rib, the first limiting rib extends along a second direction, the first positioning groove is formed in the first limiting rib, an end surface of the first limiting rib in the first positioning groove is used to limit the first positioning rib, the second limiting rib extends along a first direction, the second positioning groove is formed in the second limiting rib, an end surface of the second limiting rib in the second positioning groove is used to limit the second positioning rib.

[0009] In some embodiments, the first limiting rib has a first guide surface on the end surface of the first positioning groove, the first guide surface is used to guide the first positioning rib to be inserted into the first positioning groove, the second limiting rib has a second guide surface on the end surface of the second positioning groove, the second guide surface is used to guide the second positioning rib to be inserted into the second positioning groove.

[0010] In some embodiments, the top shell is provided with a reinforcing rib on at least one side of the first limiting rib and / or the second limiting rib, the reinforcing rib is connected to the first limiting rib and / or the second limiting rib perpendicularly.

[0011] In some embodiments, the connector includes a connector body, a first extension and a second extension, the length of the connector body extends along a first direction, the width of the connector body extends along a second direction, the connector body is provided with a first extension on at least one side along the first direction, each first extension is provided with a first positioning rib, and the first positioning rib is connected to the connector body, the connector body is provided with a second extension on at least one side along the second direction, each second extension is provided with a second positioning rib, and the second positioning rib is connected to the connector body.

[0012] In some embodiments, each first extension and each second extension is provided with a first mounting hole, the top shell is provided with a second mounting hole corresponding to each first mounting hole, the battery pack further includes a plurality of first locking members, the first mounting hole and the second mounting hole aligned are used to accommodate a first locking member to fix the connector and the top shell;

[0013] The circuit board is provided with a plurality of third mounting holes, the cell support is provided with a plurality of fourth mounting holes, the top shell is provided with a plurality of fifth mounting holes, and the battery pack further comprises a plurality of second locking members, in the third mounting holes, the fourth mounting holes and the fifth mounting holes which are aligned, the fifth mounting holes are used for allowing one second locking member to pass through the top shell, and the third mounting holes and the fourth mounting holes are used for accommodating the second locking member to fix the circuit board body and the cell support.

[0014] The battery pack further comprises a waterproof sheet covering the first mounting holes, the second mounting holes, the third mounting holes, the fourth mounting holes and the fifth mounting holes.

[0015] In some embodiments, the connector is provided with a sealing groove on the side facing the top shell, the sealing member is arranged in the sealing groove, and the top shell is provided with a pressing part on the side facing the connector, the pressing part is at least partially located in the sealing groove and presses the sealing member.

[0016] In some embodiments, the cell support is provided with a plurality of pins, and the circuit board body is provided with a plurality of pin holes, before the connector and the top shell are assembled, each pin is inserted into a corresponding pin hole, and the radial dimension of each pin hole is greater than the radial dimension of the corresponding pin, so that the circuit board body can move relative to the cell support.

[0017] An embodiment of the present application further provides an energy storage device, which comprises an energy storage power supply and the battery pack of any of the above embodiments, and the battery pack is electrically connected to the energy storage power supply through the electrical connection member exposed to the top shell.

[0018] When the battery pack of the energy storage device provided by the present application is assembled, the connector and the top shell can be assembled first, and then the circuit board body and the cell support are assembled. Since the circuit board body can move relative to the cell support when the connector and the top shell are assembled, even if the connector needs to be displaced during assembly, the circuit board body can naturally move with the connector, thereby avoiding the generation of a large assembly stress between the circuit board body and the connector, ensuring that the connector and the top shell are assembled in place, and further pressing the sealing ring to ensure the sealing performance of the exposed hole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a perspective view of an energy storage device according to an embodiment of the present application.

[0020] Figure 2 FIG. 2 is a perspective view of a battery pack in the energy storage device according to an embodiment of the present application. Figure 1

[0021] FIG. 3 is an exploded view of the battery pack in the energy storage device according to an embodiment of the present application. Figure 3 Figure 2 FIG. 4 is a sectional view of the battery pack at the sealing member in the energy storage device according to an embodiment of the present application.

[0022] Figure 4

[0023] ​​Figure 5 for Figure 3 A 3D view of the battery cell assembly and circuit board assembly.

[0024] Figure 6 for Figure 5 A 3D view of the connector.

[0025] Figure 7 This is a perspective view of the interior of the housing in one embodiment of this application.

[0026] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0027] Figure 9 for Figure 7 Enlarged view of point B in the middle.

[0028] Figure 10 for Figure 5 Exploded view of the battery cell assembly and circuit board assembly.

[0029] Figure 11 This is an exploded view of the housing and waterproof sheet in one embodiment of this application.

[0030] Figure 12 This is an exploded view of the housing and disassembled parts in one embodiment of this application.

[0031] Explanation of main component symbols

[0032] 100 - Battery pack; 200 - Energy storage device; 201 - Energy storage power supply;

[0033] 10-Top shell; 101-First positioning groove; 102-Second positioning groove; 103-First limiting rib; 1031-First guide surface; 104-Second limiting rib; 1041-Second guide surface; 105-Reinforcing rib; 11-Exposed hole; 12-Second mounting hole; 13-Fifth mounting hole; 14-Disassembled part; 15-Extrusion section;

[0034] 20-Cell assembly; 21-Cell bracket; 211-Fourth mounting hole; 212-Pin; 213-Support column;

[0035] 30 - Circuit board assembly; 31 - Circuit board body; 311 - Third mounting hole; 312 - Pin hole; 32 - Connector; 321 - First positioning rib; 322 - Second positioning rib; 323 - Connector body; 324 - First extension; 325 - Second extension; 326 - First mounting hole; 327 - Sealing groove; 33 - Pin;

[0036] 40 - Seal; 50 - Bottom shell; 60 - Second locking element; 70 - Waterproof sheet. Detailed Implementation

[0037] The technical solutions of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0038] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] The current energy storage power supply can realize capacity expansion by connecting a battery pack. The battery pack usually includes a top shell, a circuit board, a connector, a cell support, etc. Since the connector needs to protrude from the top shell, a sealing ring is usually arranged between the connector and the top shell to prevent water from entering the gap between the connector and the top shell.

[0041] In the related art, the connector can be welded on the circuit board. When assembling the battery pack, the circuit board and the cell support are generally assembled first, and then the top shell is assembled. The assembled top shell and the connector extrude the sealing ring. However, when assembling the top shell, due to factors such as assembly tolerance, the connector may need to be displaced relative to the circuit board to be successfully assembled to the top shell. In this way, the connector and the circuit board are prone to assembly stress, for example, the circuit board generates a pulling force that hinders the assembly of the connector, resulting in that the connector and the top shell cannot extrude the sealing ring, and causing the sealing between the connector and the circuit board to fail.

[0042] Therefore, the battery pack and the energy storage device provided in the present application can reduce assembly stress to improve sealing. The battery pack comprises a top shell, a cell assembly, a circuit board assembly and a sealing member. The top shell is provided with an exposed hole. The cell assembly is arranged in the top shell and comprises a cell support. The circuit board assembly comprises a circuit board body and a connector. The connector is fixed to the circuit board body. The circuit board body is assembled to the cell support and located in the top shell. The connector is assembled to the top shell and at least partially located in the exposed hole. The sealing member is arranged between the top shell and the connector. The sealing member is pressed by the connector and the top shell to seal the communication between the exposed hole and the inside of the top shell. When the connector and the top shell are assembled, the circuit board body is configured to be supported on the cell support and movable relative to the cell support, and assembled to the cell support after the connector and the top shell are assembled.

[0043] The battery pack provided in the present application can first assemble the connector and the top shell, and then assemble the circuit board body and the cell support. When the connector and the top shell are assembled, the circuit board body is movable relative to the cell support. Even if the connector needs to be displaced during assembly, the circuit board body can naturally displace with the connector, avoiding the generation of large assembly stress between the circuit board body and the connector, thereby ensuring that the connector and the top shell are assembled in place, and then the connector and the top shell press the sealing ring to ensure the sealing of the exposed hole.

[0044] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0045] As shown in Figure 1 , some embodiments of the present application provide a battery pack 100 and an energy storage device 200. The energy storage device 200 comprises an energy storage power supply 201 and the battery pack 100. The battery pack 100 is detachably electrically connected with the energy storage power supply 201. The battery pack 100 is used to supply power to the energy storage power supply 201. The energy storage power supply 201 can realize power expansion by connecting the battery pack 100 externally.

[0046] For example, the energy storage device 200 can be a mobile power supply applied to an outdoor scene, or a household energy storage system used for household energy storage, etc. The energy storage device 200 can realize power supply to external devices or charging of the energy storage device 200 by external devices.

[0047] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 5As shown, the battery pack 100 comprises a top shell 10, a cell assembly 20, a circuit board assembly 30 and a seal 40. The top shell 10 is provided with an exposed hole 11. The cell assembly 20 is arranged in the top shell 10, and the cell assembly 20 comprises a cell holder 21 and a plurality of cells (not shown) arranged in the cell holder 21. The circuit board assembly 30 comprises a circuit board body 31 and a connector 32, and the connector 32 is fixed to the circuit board body 31, for example, the connector 32 is welded to the circuit board body 31. The circuit board body 31 is assembled to the cell holder 21 and arranged in the top shell 10, and the connector 32 is assembled to the top shell 10 and at least partially arranged in the exposed hole 11, and the battery pack 100 is electrically connected to the energy storage power source 201 through the part of the connector 32 exposed in the exposed hole 11. The seal 40 is arranged between the top shell 10 and the connector 32, and the seal 40 is pressed by the connector 32 and the top shell 10 to seal the communication between the exposed hole 11 and the inside of the top shell 10, thereby preventing the battery pack 100 from being waterlogged or dusted.

[0048] In the process of assembling the connector 32 and the top shell 10, the circuit board body 31 is supported on the cell holder 21 and can move relative to the cell holder 21, that is, at this time, the circuit board body 31 has not been assembled to the cell holder 21, and after the connector 32 and the top shell 10 are assembled, the circuit board body 31 is assembled with the cell holder 21. In this way, the battery pack 100 can be assembled by first assembling the connector 32 and the top shell 10, and then assembling the circuit board body 31 and the cell holder 21. Since the circuit board body 31 can move relative to the cell holder 21 when the connector 32 and the top shell 10 are assembled, even if the connector 32 needs to be shifted due to assembly tolerance and other factors during assembly, the circuit board body 31 can naturally shift with the connector 32, thereby avoiding the generation of a large assembly stress between the circuit board body 31 and the connector 32, and ensuring that the connector 32 and the top shell 10 are assembled in place, and further ensuring that the connector 32 and the top shell 10 press the seal 40 to ensure the sealing of the exposed hole 11.

[0049] In some embodiments, as shown in FIG. 1, Figure 3 As shown, the battery pack 100 further comprises a bottom shell 50, and the top shell 10 and the bottom shell 50 are combined to form the shell of the battery pack 100. In the process of assembling the battery pack 100, the cell holder 21 carrying the circuit board assembly 30 can be first assembled to the bottom shell 50, and then the top shell 10 is covered to combine the top shell 10 and the bottom shell 50 to protect the internal circuit board assembly 30. In the process of covering the top shell 10, the top shell 10 and the connector 32 are assembled and aligned.

[0050] In some embodiments, as shown in FIG. 1, Figures 6 to 9As shown, the connector 32 has a first positioning rib 321 extending along a first direction X and a second positioning rib 322 extending along a second direction Y perpendicular to the first direction X. The top shell 10 is provided with a first positioning groove 101 and a second positioning groove 102. In the process of assembling the connector 32 and the top shell 10, the top shell 10 is moved towards the connector 32 along a third direction Z perpendicular to the first direction X and the second direction Y, and in the process of assembling, the first positioning rib 321 is inserted into the first positioning groove 101, and the second positioning rib 322 is inserted into the second positioning groove 102, the groove wall of the first positioning groove 101 limits the first positioning rib 321 along the second direction Y, and the groove wall of the second positioning groove 102 limits the second positioning rib 322 along the first direction X, so as to realize the assembly alignment of the top shell 10 and the connector 32, and limit the relative position between the top shell 10 and the connector 32, so that the connector 32 cannot shake relative to the top shell 10 after being assembled with the top shell 10.

[0051] In some embodiments, as shown in Figures 6 to 9 The top shell 10 has a first limiting rib 103 extending along the second direction Y, and the first positioning groove 101 is formed in the first limiting rib 103, and the end face of the first limiting rib 103 in the first positioning groove 101 is used for limiting the first positioning rib 321. The second limiting rib 104 extends along the first direction X, and the second positioning groove 102 is formed in the second limiting rib 104, and the end face of the second limiting rib 104 in the second positioning groove 102 is used for limiting the second positioning rib 322. Compared with other limiting modes, the top shell 10 limits the connector 32 through the first limiting rib 103 and the second limiting rib 104, which can simplify the structure of the top shell 10 and reduce the weight of the top shell 10, and is also beneficial to the machining and production of the top shell 10.

[0052] In some embodiments, as shown in Figure 6 , Figure 8 and Figure 9 The first limiting rib 103 has a first guide face 1031 on the end face of the first positioning groove 101, and the first guide face 1031 is used for guiding the first positioning rib 321 to be inserted into the first positioning groove 101. The second limiting rib 104 has a second guide face 1041 on the end face of the second positioning groove 102, and the second guide face 1041 is used for guiding the second positioning rib 322 to be inserted into the second positioning groove 102. The first guide face 1031 and the second guide face 1041 can improve the efficiency of the assembly alignment of the top shell 10 and the connector 32. Exemplarily, the first guide face 1031 and the second guide face 1041 are chamfers or round corners, etc.

[0053] In some embodiments, as shown in Figure 7 and Figure 8As shown, the top shell 10 is provided with a reinforcing rib 105 on at least one side of the first limiting rib 103 and / or the second limiting rib 104, the reinforcing rib 105 being connected perpendicularly to the first limiting rib 103 and / or the second limiting rib 104, and the reinforcing rib 105 being used to improve the structural strength of the first limiting rib 103 and / or the second limiting rib 104 and reduce the risk of bending or breaking of the first limiting rib 103 and / or the second limiting rib 104.

[0054] In some embodiments, as shown in Figure 6 As shown, the connector 32 comprises a connector body 323, a first extension 324 and a second extension 325. The length of the connector body 323 extends along the first direction X, and the width of the connector body 323 extends along the second direction Y. The connector body 323 is provided with one first extension 324 on at least one side along the first direction X, each first extension 324 is provided with one first positioning rib 321, and the first positioning rib 321 is connected to the connector body 323 and the first extension 324 to improve the structural strength of the first positioning rib 321. The connector body 323 is provided with one second extension 325 on at least one side along the second direction Y, each second extension 325 is provided with one second positioning rib 322, and the second positioning rib 322 is connected to the second extension 325 and the connector body 323 to improve the structural strength of the second positioning rib 322.

[0055] Further optionally, as shown in Figure 1 , Figure 3 and Figure 6 As shown, the connector body 323 is provided with a plurality of insertion pins 33 arranged in an array, and the plurality of insertion pins 33 extend along the third direction Z. The insertion pins 33 are exposed to the exposed hole 11 at the end away from the connector body 323 to electrically connect the energy storage power supply 201. The connector 32 can improve the convenience of plugging between the battery pack 100 and the energy storage power supply 201 through the insertion pins 33, and eliminates the operation of plugging a cable.

[0056] In some embodiments, as shown in Figure 3 , Figure 6 and Figure 11 As shown, each first extension 324 and each second extension 325 is provided with one first mounting hole 326, the top shell 10 is provided with one second mounting hole 12 corresponding to each first mounting hole 326, and the battery pack 100 further comprises a plurality of first locking members (not shown in the figure), which are exemplarily screws. One first mounting hole 326 and one second mounting hole 12 in alignment are used to accommodate one first locking member to fix the connector 32 and the top shell 10.

[0057] Wherein, after the top cover 10 is covered on the cover, since the top cover 10 is combined with the bottom cover 50, it is difficult to install the first locking member from the inside of the top cover 10, therefore, when the first locking member is installed, the first locking member can enter the first installation hole 326 from the side of the top cover 10 away from the connector 32 through the second installation hole 12, so as to lock the connector 32 and the top cover 10 from the outside of the top cover 10.

[0058] In some embodiments, as shown in Figure 3 , Figure 10 and Figure 11 , the circuit board 31 is provided with a plurality of third installation holes 311, the cell holder 21 is provided with a plurality of fourth installation holes 211, the top cover 10 is provided with a plurality of fifth installation holes 13, and the battery pack 100 further comprises a plurality of second locking members 60, which are exemplarily screws. In one third installation hole 311, one fourth installation hole 211 and one fifth installation hole 13, the fifth installation hole 13 is used for passing one second locking member 60 through the top cover 10, and the third installation hole 311 and the fourth installation hole 211 are used for accommodating the second locking member 60, so as to fix the circuit board body 31 and the cell holder 21.

[0059] Wherein, after the top cover 10 is covered on the cover, since the top cover 10 is combined with the bottom cover 50, it is difficult to install the second locking member 60 from the inside of the top cover 10, therefore, when the second locking member 60 is installed, the second locking member 60 can enter the third installation hole 311 and the fourth installation hole 211 from the side of the top cover 10 away from the connector 32 through the fifth installation hole 13, so as to lock the circuit board body 31 and the cell holder 21 from the outside of the top cover 10.

[0060] In some embodiments, as shown in Figure 11 and Figure 12 , the battery pack 100 further comprises a waterproof sheet 70, which covers the plurality of first installation holes 326, the plurality of second installation holes 12, the plurality of third installation holes 311, the plurality of fourth installation holes 211 and the plurality of fifth installation holes 13, so as to improve the sealing performance. Exemplarily, the waterproof sheet 70 is a waterproof Mylar sheet.

[0061] In some embodiments, as shown in Figure 11 and Figure 12 , the top cover 10 has a detachable part 14, which is detachably arranged on the top of the top cover 10. When the first locking member and the second locking member 60 are installed, the detachable part 14 is assembled to the top of the top cover 10, so as to cover the plurality of second installation holes 12 and the plurality of fifth installation holes 13 of the top cover 10, thereby protecting the waterproof sheet 70 to improve the sealing performance and playing a decorative role.

[0062] In some embodiments, as shown in Figure 4 and Figure 7As shown, the connector 32 is provided with a sealing groove 327 on the side facing the top shell 10, the sealing member 40 is arranged in the sealing groove 327, and the top shell 10 is provided with a pressing portion 15 on the side facing the connector 32. After the top shell 10 and the connector 32 are assembled, the pressing portion 15 is at least partially located in the sealing groove 327 and presses the sealing member 40 to achieve sealing. Exemplarily, the sealing member 40 is a sealing ring, and the sealing groove 327 and the pressing portion 15 are both annular and arranged around the exposed hole 11 to ensure the sealing of the exposed hole 11.

[0063] In some embodiments, as shown in Figure 5 and Figure 10 The cell holder 21 is provided with a plurality of pins 212, and the circuit board body 31 is provided with a plurality of pin holes 312. Before the connector 32 and the top shell 10 are assembled, each pin 212 is inserted into a corresponding pin hole 312, and the radial dimension of each pin hole 312 is greater than that of the corresponding pin 212, so that the circuit board body 31 can move relative to the cell holder 21. The cell holder 21 can pre-position the circuit board body 31 through the pins 212, so that when the cell holder 21 supports the circuit board body 31, the circuit board body 31 is not easy to fall off the cell holder 21.

[0064] In some embodiments, as shown in Figure 5 and Figure 10 The cell holder 21 is provided with a plurality of support columns 213, and the top of each support column 213 is provided with a fourth mounting hole 211. The plurality of support columns 213 are used to support the circuit board body 31 and form a gap between the circuit board body 31 and the cell holder 21, so as to avoid the interference of the cell holder 21 with the circuit board body 31 and facilitate heat dissipation.

[0065] In addition, those skilled in the art should understand that the above embodiments are only used to illustrate the present application, and are not used as limitation to the present application. Any appropriate changes and modifications made to the above embodiments within the spirit and scope of the present application are within the disclosure range of the present application.

Claims

1. A battery pack, characterized in that, include: Top shell, the top shell being provided with an exposure hole; A battery cell assembly, wherein the battery cell assembly is disposed within the top shell, and the battery cell assembly includes a battery cell support; A circuit board assembly, comprising a circuit board body and a connector, wherein the connector is fixed to the circuit board body, the circuit board body is assembled to the cell support and located within the top shell, and the connector is assembled to the top shell and located at least partially within the exposed hole; and A sealing element is disposed between the top shell and the connector, and the sealing element is pressed by the connector and the top shell to seal the communication between the exposed hole and the interior of the top shell; When assembling the connector and the top shell, the circuit board body is configured to be supported on the cell support and movable relative to the cell support, and is assembled with the cell support after the connector and the top shell are assembled.

2. The battery pack as described in claim 1, characterized in that: The connector has a first positioning rib and a second positioning rib. The first positioning rib extends along a first direction, and the second positioning rib extends along a second direction. The first direction and the second direction are perpendicular to each other. The top shell is provided with a first positioning groove and a second positioning groove. The first positioning rib is inserted into the first positioning groove, and the groove wall of the first positioning groove limits the first positioning rib along the second direction. The second positioning rib is inserted into the second positioning groove, and the groove wall of the second positioning groove limits the second positioning rib along the first direction.

3. The battery pack as described in claim 2, characterized in that: The top shell has a first limiting rib and a second limiting rib. The first limiting rib extends along the second direction. A first positioning groove is formed on the first limiting rib. The end face of the first limiting rib in the first positioning groove is used to limit the first positioning rib. The second limiting rib extends along the first direction. A second positioning groove is formed on the second limiting rib. The end face of the second limiting rib in the second positioning groove is used to limit the second positioning rib.

4. The battery pack as described in claim 3, characterized in that: The first limiting rib has a first guiding surface on the end face of the first positioning groove, and the first guiding surface is used to guide the first positioning rib to be inserted into the first positioning groove. The second limiting rib has a second guiding surface on the end face of the second positioning groove, and the second guiding surface is used to guide the second positioning rib to be inserted into the second positioning groove.

5. The battery pack as described in claim 3, characterized in that: The top shell has a reinforcing rib on at least one side of the first limiting rib and / or the second limiting rib, and the reinforcing rib is vertically connected to the first limiting rib and / or the second limiting rib.

6. The battery pack as described in claim 3, characterized in that: The connector includes a connector body, a first extension, and a second extension. The length of the connector body extends along a first direction, and the width of the connector body extends along a second direction. The connector body has a first extension on at least one side along the first direction, and each first extension has a first positioning rib connected to the connector body. The connector body has a second extension on at least one side along the second direction, and each second extension has a second positioning rib connected to the connector body.

7. The battery pack as described in claim 6, characterized in that: Each of the first extension and each of the second extensions is provided with a first mounting hole, and the top shell is provided with a second mounting hole corresponding to each of the first mounting holes. The battery pack also includes a plurality of first locking fasteners, and the aligned first mounting holes and second mounting holes are used to accommodate one of the first locking fasteners to fix the connector and the top shell. The circuit board is provided with multiple third mounting holes, the cell support is provided with multiple fourth mounting holes, the top shell is provided with multiple fifth mounting holes, and the battery pack also includes multiple second fasteners. Among the relatively aligned third mounting holes, fourth mounting holes, and fifth mounting holes, the fifth mounting hole is used to allow one second fastener to pass through the top shell, and the third mounting holes and fourth mounting holes are used to accommodate the second fastener to fix the circuit board body and the cell support. The battery pack also includes a waterproof sheet that covers the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole, and the fifth mounting hole.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The connector has a sealing groove on the side facing the top shell, and the seal is disposed in the sealing groove. The top shell has a pressing part on the side facing the connector, and the pressing part is at least partially located in the sealing groove and presses the seal.

9. The battery pack according to any one of claims 1 to 7, characterized in that: The battery cell support is provided with multiple pins, and the circuit board body is provided with multiple pin holes. Before assembling the connector and the top shell, each pin is inserted into a corresponding pin hole. The radial dimension of each pin hole is larger than the radial dimension of the corresponding pin, so that the circuit board body can move relative to the battery cell support.

10. An energy storage device, characterized in that: The energy storage device includes an energy storage power source and a battery pack as described in any one of claims 1 to 9, wherein the battery pack is electrically connected to the energy storage power source via the connector exposed in the exposed hole.

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