Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment. The battery pack comprises a shell, a battery cell assembly, a first terminal and a first wire harness, the shell is provided with a containing space, and the containing space comprises a first space and a second space which are arranged in a separated mode. The battery cell assembly is arranged in the first space. The first terminal is configured to connect an external device. The first wire harness penetrates through the second space, the second space comprises a first opening and a second opening, the first wire harness penetrates through the first opening and is detachably connected with the first terminal, and the first wire harness penetrates through the second opening and is connected with the battery cell assembly. The battery core assembly and the first wire harness are arranged in different spaces, the risk that the first wire harness scrapes the battery core assembly is reduced, the first wire harness penetrates through the second space and is detachably connected with the first terminal, and the first wire harness is convenient to replace.

Description

Technical Field

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

[0002] At present, battery packs are widely used in electric vehicles, intelligent energy storage equipment and other fields. Battery packs include battery cells and wiring harnesses. The battery cells are connected to the wiring harnesses. Under conditions such as vibration, the wiring harnesses and the battery cells will interact with each other, which can easily scratch the battery cells and affect the battery life. Fixing the wiring harnesses with potting resin can easily make the wiring harnesses unable to be replaced. Summary of the invention

[0003] In view of this, it is necessary to provide a battery pack and electrical equipment to reduce the situation where the wiring harness scratches the battery cell and facilitate the replacement of the wiring harness.

[0004] An embodiment of the present application provides a battery pack, comprising a shell, a battery cell assembly, a first terminal and a first wiring harness. The shell has a containing space, and the containing space includes a first space and a second space that are separated. The battery cell assembly is arranged in the first space. The first terminal is configured to connect an external device. The first wiring harness is passed through the second space, and the second space includes a first opening and a second opening. The first wiring harness passes through the first opening and is detachably connected to the first terminal. The first wiring harness passes through the second opening and is connected to the battery cell assembly. By arranging the battery cell assembly and the first wiring harness in different spaces, the risk of the first wiring harness scratching the battery cell assembly is reduced. The first wiring harness is passed through the second space and is detachably connected to the first terminal, which facilitates the replacement of the first wiring harness.

[0005] In one or more optional embodiments above, the first wiring harness includes a first section and a second section, the first section is connected to the first terminal, the second section is connected to the battery cell assembly, the first section and the second section are detachably connected, and the connection between the first section and the second section is located outside the second space. By providing the first wiring harness with multiple sections, one section of the wiring harness can be detached and replaced, which facilitates the maintenance of the battery pack.

[0006] In one or more of the above optional embodiments, a first circuit board is further included, the first circuit board is connected to the battery cell assembly, and the first wiring harness passes through the second opening and is detachably connected to the first circuit board, so as to facilitate the removal of the first wiring harness from the first circuit board and the replacement of the first wiring harness.

[0007] In one or more of the above optional embodiments, the second section is connected to the surface of the first circuit board facing away from the battery cell assembly, so as to facilitate the removal of the second section from the first circuit board.

[0008] In one or more optional embodiments above, the housing includes a top cover, the first terminal is detachably connected to the top cover, and further includes a closure member, the top cover, the closure member, and the battery cell assembly are arranged in sequence along a first direction, and the connection between the first section and the second section is located on a side of the top cover away from the closure member.

[0009] In one or more optional embodiments above, the housing includes a top cover and a bottom cover, and the first terminal is detachably connected to the top cover. The battery cell assembly, the first circuit board and the bottom cover are arranged in sequence along a first direction, and the connection between the first section and the second section is located on a side of the first circuit board away from the battery cell assembly.

[0010] In one or more of the above optional embodiments, a buffer is further included, the shell includes a side wall portion, the buffer is arranged between the battery cell assembly and the side wall portion, and a second space is formed between the buffer and the side wall portion.

[0011] In one or more optional embodiments above, the shell includes a side wall portion, the side wall portion has a receiving space, the side wall portion includes a first side wall and a first extension wall, the first extension wall is connected to the inner surface of the first side wall and forms a second space with the first side wall.

[0012] In one or more of the above optional embodiments, the battery pack includes a potting resin, which is disposed in the first space. The potting resin bonds the battery cell assembly and the buffer component to insulate and protect the battery cell assembly.

[0013] In one or more optional embodiments above, the battery cell assembly and the first circuit board are arranged along a first direction, and along the first direction, the buffer member includes a third opening and a fourth opening arranged along the first direction. The battery pack also includes a sealing member, the sealing member seals the third opening, and the fourth opening is configured to be injected with a potting resin, and the potting resin bonds the sealing member, the battery cell assembly, and the buffer member.

[0014] In one or more of the above optional embodiments, along the first direction, the potting resin does not exceed the surface of the first circuit board facing the battery cell assembly, thereby reducing the potting resin adhering to the first circuit board and facilitating the removal of the first circuit board.

[0015] In one or more optional embodiments above, the housing includes a side wall portion and a top cover and a bottom cover connected to the side wall portion, the top cover includes a first receiving cavity, and at least part of the first terminal is disposed in the first receiving cavity. A second receiving cavity is provided between the bottom cover and the side wall portion, and the first circuit board is disposed in the second receiving cavity, and the second space communicates the first receiving cavity and the second receiving cavity.

[0016] In one or more optional embodiments above, the housing includes a top cover and a bottom cover, and the top cover and the bottom cover are arranged along a first direction. The battery pack also includes a pressure relief portion, the pressure relief portion is connected to the top cover, and along the first direction, the projection of the pressure relief portion overlaps with the projection of the second space.

[0017] In one or more optional embodiments above, the battery pack includes a second terminal connected to the first circuit board, the housing includes a bottom cover, the bottom cover is detachably connected to the second terminal, the second terminal is exposed from the bottom cover, and the second terminal is configured to connect to an external device.

[0018] The present application provides an electrical device, comprising a battery pack according to any one of the above embodiments.

[0019] The above-mentioned battery pack and electrical equipment are arranged in different spaces through the battery cell assembly and the first wiring harness, which reduces the risk of the first wiring harness scratching the battery cell assembly. The first wiring harness is passed through the second space and is detachably connected to the first terminal, which is convenient for replacing the first wiring harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a battery pack in some embodiments is shown.

[0021] Figure 2 A schematic diagram of a battery pack explosion in some embodiments is shown.

[0022] Figure 3 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0023] Figure 4 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0024] Figure 5 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0025] Figure 6 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0026] Figure 7 Shows Figure 6 Schematic diagram of the structure of part of the battery pack from another perspective.

[0027] Figure 8 Schematic diagrams of the structures of buffer components in some embodiments are shown.

[0028] Fig. 9 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0029] Fig.10 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0030] Fig.11 Schematic diagrams of the structures of the side wall parts in some embodiments are shown.

[0031] Fig.12 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0032] Fig.13 Schematic diagrams of the structures of connecting members in some embodiments are shown.

[0033] Fig.14 A simplified schematic diagram of electrical equipment in some embodiments is shown.

[0034] Description of main component symbols: Battery Pack 100 Housing 10 Containment Chamber 11 First Space 111 Second Space 112 First opening 1121 Second opening 1122 Top cover 12 Top cover body 12a Cover plate 12b The first receiving cavity 121 Fixed portion 122 Side wall portion 13 First side wall 131 Second side wall 132 The third side wall 133 Fourth side wall 134 The first extension wall 135 Bottom cover 14 The second receiving cavity 141 Battery cell assembly 20 Battery 21 Battery shell 211 Electrode terminal 212 First terminal 30 First wiring harness 40 41 Section 242 Buffer 50 The third opening 501 Fourth opening 502 First buffer portion 51 Second buffer portion 52 The third buffer portion 53 Fourth buffer portion 54 First circuit board 60 Second terminal 70 Second circuit board 80 First electrical connector 81 Second electrical connector 82 Structural Parts 101 Connector 102 Sampling Harness 103 Limiting piece 104 Closure 105 Pressure relief unit 106 First direction X Second direction Y The third direction Z Electrical equipment 200 The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments 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 part of the embodiments of the present application, rather than all of the embodiments.

[0036] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0038] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal to each other between the two components. For example, in combination with numerical descriptions, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0039] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0040] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] See also Figures 1 to 7An embodiment of the present application provides a battery pack 100, including a shell 10 and a battery cell assembly 20, the shell 10 has a receiving space 11, the receiving space 11 includes a first space 111 and a second space 112 separated from each other, and the battery cell assembly 20 is arranged in the first space 111.

[0042] In some embodiments, the battery pack 100 includes a first terminal 30 and a first wiring harness 40, wherein the first terminal 30 is configured to connect to an external device. The first wiring harness 40 is disposed in the second space 112. The second space 112 includes a first opening 1121 and a second opening 1122, wherein the first wiring harness 40 passes through the first opening 1121 and is detachably connected to the first terminal 30, and the first wiring harness 40 passes through the second opening 1122 and is connected to the battery cell assembly 20.

[0043] The present application arranges the battery cell assembly 20 and the first wiring harness 40 in different spaces to reduce the risk of the first wiring harness 40 scratching the battery cell assembly 20. The first wiring harness 40 is passed through the second space 112 and is detachably connected to the first terminal 30, so that the first wiring harness 40 is easy to replace.

[0044] See also Figure 2 and Figure 3 In some embodiments, the housing 10 includes a top cover 12, and the first terminal 30 is detachably connected to the top cover 12, so as to facilitate replacement of the first terminal 30. The first terminal 30 is exposed from the top cover 12 and is used to connect an external device. Optionally, the first terminal 30 is connected to an external power-consuming device. Optionally, the first terminal 30 is connected to an external charging device.

[0045] See also Figure 2 In some embodiments, the housing 10 includes a side wall portion 13 having a receiving space 11, and the top cover 12 is connected to the side wall portion 13, and the top cover 12 and the side wall portion 13 are arranged along the first direction X.

[0046] In some embodiments, the top cover 12 includes a top cover body 12a and a cover plate 12b, the top cover body 12a is detachably connected to the side wall portion 13, the cover plate 12b is connected to the top cover body 12a, the first wire harness 40 passes through the first opening 1121, and is partially disposed between the top cover body 12a and the cover plate 12b.

[0047] See also Figure 6 and Figure 7 In some embodiments, the battery pack 100 includes a buffer 50 disposed between the battery cell assembly 20 and the side wall portion 13 . A second space 112 is formed between the buffer 50 and the side wall portion 13 .

[0048] In some embodiments, the buffer 50 includes a first buffer portion 51, a second buffer portion 52, a third buffer portion 53 and a fourth buffer portion 54, the first buffer portion 51 and the second buffer portion 52 are arranged along the second direction Y, and the third buffer portion 53 and the fourth buffer portion 54 are arranged along the third direction Z. The first buffer portion 51 connects the third buffer portion 53 and the fourth buffer portion 54, the second buffer portion 52 connects the third buffer portion 53 and the fourth buffer portion 54, and the first buffer portion 51, the second buffer portion 52, the third buffer portion 53 and the fourth buffer portion 54 are surrounded to form a first space 111. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. Optionally, the buffer 50 includes foam.

[0049] In some embodiments, the battery pack 100 includes a structural member 101, a portion of which is disposed between the battery cell assembly 20 and the buffer member 50, and the structural member 101 is disposed on the outside of the battery cell assembly 20 to protect the battery cell assembly 20 and facilitate the insertion of the battery cell assembly 20 into the shell.

[0050] In some embodiments, the structural member 101 includes a PC sheet, which is helpful for protecting the battery cell assembly 20 .

[0051] See also Fig.11 In some embodiments, the side wall portion 13 includes a first side wall 131, a second side wall 132, a third side wall 133, and a fourth side wall 134. The first side wall 131 and the second side wall 132 are arranged along the second direction Y, the third side wall 133 and the fourth side wall 134 are arranged along the third direction Z, the first side wall 131 connects the third side wall 133 and the fourth side wall 134, the second side wall 132 connects the third side wall 133 and the fourth side wall 134, and forms the receiving space 11.

[0052] In some embodiments, the side wall portion 13 includes a first extension wall 135, which connects the surface of the first side wall 131 toward the second side wall 132 and forms a second space 112 with the first side wall 131; the first extension wall 135, the first side wall 131, the second side wall 132, the third side wall 133 and the fourth side wall 134 form the first space 111.

[0053] See also Figure 2 and Fig. 9 In some embodiments, the housing 10 includes a bottom cover 14, which is detachably connected to the side wall portion 13, and the side wall portion 13 and the bottom cover 14 are arranged along the first direction X.

[0054] In some embodiments, the battery pack 100 includes a first circuit board 60, which is connected to the battery cell assembly 20. The first wiring harness 40 passes through the second opening 1122 and is detachably connected to the first circuit board 60, so as to facilitate the removal of the first wiring harness 40 from the first circuit board 60 and the replacement of the first wiring harness 40.

[0055] See also Figures 2 to 3 In some embodiments, the top cover body 12 a includes a first receiving cavity 121 , and at least a portion of the first terminal 30 is disposed in the first receiving cavity 121 .

[0056] In some embodiments, part of the first wire harness 40 is disposed in the first receiving cavity 121. By removing the cover plate 12b, the first terminal 30 and part of the first wire harness 40 can be exposed, so that the first terminal 30 and the first wire harness 40 can be easily replaced.

[0057] See also Fig. 9 In some embodiments, a second receiving cavity 141 is defined between the bottom cover 14 and the side wall portion 13 , the first circuit board 60 is disposed in the second receiving cavity 141 , and the second space 112 communicates with the first receiving cavity 121 and the second receiving cavity 141 .

[0058] See also Fig.10 , Fig.12 and Fig.13 In some embodiments, the battery pack 100 includes a connector 102, which is connected to the inner surface of the side wall portion 13. Along the first direction X, the connector 102 is located between the battery cell assembly 20 and the first circuit board 60. Optionally, the connector 102 includes a metal plate, which is welded to two or three of the first side wall 131, the second side wall 132, the third side wall 133, and the fourth side wall 134. The connector 102 and the housing 10 can block the battery cell assembly 20 and the first circuit board 60, and can reduce the signal interference of the battery cell assembly 20 on the first circuit board 60.

[0059] In some embodiments, the first circuit board 60 is detachably connected to the connecting member 102 to facilitate the removal of the first circuit board 60 .

[0060] Optionally, the first circuit board 60 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0061] Optionally, the first circuit board 60 includes a flexible printed circuit (FPC). Optionally, the first circuit board 60 includes a printed circuit board (PCB).

[0062] See also Figure 2In some embodiments, the battery pack 100 includes a second terminal 70, and the second terminal 70 is detachably connected to the first circuit board 60. The second terminal 70 is detachably connected to the bottom cover 14 to facilitate replacement of the second terminal 70. The second terminal 70 is exposed at the bottom cover 14, and the second terminal 70 is configured to connect to an external device. Optionally, the second terminal 70 is connected to an external electrical device. Optionally, the second terminal 70 is connected to an external charging device. In the present application, the first terminal 30 is connected to an external electrical device, the second terminal 70 is connected to an external charging device, the first terminal 30 is a discharge terminal, and the second terminal 70 is a charging terminal.

[0063] See also Fig.10 and Fig.12 In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction X, the battery cell 21 includes a battery cell housing 211, an electrode assembly and an electrode terminal 212, the electrode assembly is disposed in the battery cell housing 211, the electrode terminal 212 is connected to the electrode assembly and extends out of the battery cell housing 211.

[0064] In some embodiments, the battery pack 100 includes a second circuit board 80 , and the second circuit board 80 and the battery cell assembly 20 are arranged along the third direction Z. The electrode terminal 212 is connected to the second circuit board 80 .

[0065] Optionally, the second circuit board 80 includes a flexible printed circuit (FPC). Optionally, the second circuit board 80 includes a printed circuit board (PCB).

[0066] In some embodiments, the second circuit board 80 is provided with a first electrical connector 81 and a second electrical connector 82, the first electrical connector 81 is connected to the first circuit board 60, and the second electrical connector 82 is connected to the first circuit board 60, and the first electrical connector 81 and the second electrical connector 82 are used to transmit the electrical energy of the battery cell assembly 20 to the first circuit board 60, transmit it to the first terminal 30 through the first wiring harness 40, and then transmit it to the external device from the first terminal 30. Fig.10 In the embodiment, the first electrical connector 81 and the second electrical connector 82 are respectively connected to the total positive electrode terminal and the total negative electrode terminal of the battery cell assembly 20 , and are not yet connected to the first circuit board 60 .

[0067] In some embodiments, the first electrical connector 81 is bent and connected to the first circuit board 60, and the second electrical connector 82 is bent and connected to the first circuit board 60. Optionally, the first electrical connector 81 includes a copper busbar. Optionally, the second electrical connector 82 includes a copper busbar.

[0068] In some embodiments, the battery pack 100 includes a sampling harness 103, which is plugged into the first circuit board 60. The sampling harness 103 is plugged into the second circuit board 80. The sampling harness 103 is used to collect and transmit signals such as temperature, voltage, current, and resistance of the battery cell assembly 20.

[0069] See also Figure 3 , Figure 4 and Fig. 9 In some embodiments, the first wiring harness 40 includes a first section 41 and a second section 42, the first section 41 is connected to the first terminal 30, the second section 42 is connected to the battery cell assembly 20, and the first section 41 and the second section 42 are detachably connected. The connection between the first section 41 and the second section 42 is located outside the second space 112. By providing the first wiring harness 40 with multiple sections, one of the sections can be detached and replaced, which facilitates the maintenance of the battery pack 100.

[0070] In some embodiments, the top cover 12 and the battery cell assembly 20 are arranged along the first direction X, and the connection between the first section 41 and the second section 42 is located on a side of the top cover 12 away from the battery cell assembly 20 .

[0071] In some embodiments, the connection between the first section 41 and the second section 42 is located in the first receiving cavity 121 .

[0072] In some embodiments, the top cover 12 is provided with a fixing portion 122 , and the first section 41 and the second section 42 are detachably connected to the fixing portion 122 .

[0073] In some embodiments, the first section 41 and the second section 42 are plugged into each other, and the plugging position of the first section 41 and the second section 42 is located in the first receiving cavity 121 .

[0074] In some embodiments, the first wiring harness 40 includes two power wiring harnesses, one of which is used to connect a positive line, and the other is used to connect a negative line.

[0075] See also Figure 4 In some embodiments, the battery pack 100 includes a stopper 104, which is disposed at the first opening 1121, and the first wiring harness 40 is passed through the stopper 104. The stopper 104 limits the movement of the first wiring harness 40 in the second space 112, thereby reducing the pulling on the first terminal 30 and the first circuit board 60.

[0076] See also Fig. 9 and Fig.12 In some embodiments, the second section 42 is connected to the surface of the first circuit board 60 facing away from the battery cell assembly 20 , so as to facilitate the removal of the second section 42 from the first circuit board 60 .

[0077] In some embodiments, the connection between the first section 41 and the second section 42 is located on a side of the first circuit board 60 facing away from the battery cell assembly 20 .

[0078] In some embodiments, the battery pack 100 includes a potting resin (not shown), which is disposed in the first space 111 . The potting resin bonds the battery cell assembly 20 and the buffer 50 to insulate and protect the battery cell assembly 20 .

[0079] In some embodiments, the potting resin bonds the battery cell assembly 20 , the buffer 50 , and the second circuit board 80 , thereby insulating and protecting the battery cell assembly 20 and the second circuit board 80 .

[0080] In some embodiments, the potting resin is configured to be formed by placing an insulating material in the first space 111 and then curing the insulating material.

[0081] In some embodiments, the insulating material includes one of polyurethane glue, epoxy glue, and silicone glue. Optionally, the insulating material includes quick-drying glue.

[0082] See also Figures 6 to 8 In some embodiments, along the first direction X, the buffer 50 includes a third opening 501 and a fourth opening 502 arranged along the first direction X. The battery pack 100 includes a sealing member 105, the sealing member 105 is connected to the buffer 50, and closes the third opening 501. The fourth opening 502 is used to inject a potting resin, and the potting resin bonds the sealing member 105, the battery cell assembly 20, the buffer 50, and the second circuit board 80.

[0083] In some embodiments, the connector 102 and the first circuit board 60 partially cover the fourth opening 502 , and partially expose the fourth opening 502 , which is convenient for injecting insulating material.

[0084] Please also read Fig.12 Before injecting the insulating material, the third opening 501 is first closed to reduce the leakage of the insulating material from the third opening 501 to the top cover 12, which makes it difficult to remove the top cover 12. Then, the battery pack 100 is inverted, and the insulating material is injected into the first space 111 from the fourth opening 502.

[0085] In some embodiments, along the first direction X, the potting resin does not extend beyond the surface of the first circuit board 60 facing the battery cell assembly 20 , thereby reducing the potting resin from adhering to the first circuit board 60 and facilitating the removal of the first circuit board 60 .

[0086] See also Figure 4 In some embodiments, the battery pack 100 includes a pressure relief portion 106 , which is connected to the top cover 12 . Along the first direction X, the projection of the pressure relief portion 106 overlaps with the projection of the second space 112 , thereby facilitating pressure relief through the second space 112 .

[0087] See also Fig.14 The present application also provides an electric device 200 using the above-mentioned battery pack 100. In one embodiment, the electric device 200 of the present application can be, but is not limited to, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household battery modules, etc.

[0088] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: The housing has a receiving space, wherein the receiving space includes a first space and a second space that are separated and arranged; A battery cell assembly is arranged in the first space; A first terminal configured to connect to an external device; The first wiring harness is passed through the second space, the second space includes a first opening and a second opening, the first wiring harness passes through the first opening and is detachably connected to the first terminal, and the first wiring harness passes through the second opening and is connected to the battery cell assembly.

2. The battery pack according to claim 1, characterized in that: The first wiring harness includes a first section and a second section, the first section is connected to the first terminal, the second section is connected to the battery cell assembly, the first section and the second section are detachably connected, and the connection between the first section and the second section is located outside the second space.

3. The battery pack according to claim 2, characterized in that: Also includes A first circuit board is connected to the battery cell assembly, and the first wiring harness passes through the second opening and is detachably connected to the first circuit board.

4. The battery pack according to claim 3, characterized in that: The second section is connected to a surface of the first circuit board facing away from the battery cell assembly.

5. The battery pack according to claim 3, characterized in that: The housing includes a top cover, and the first terminal is detachably connected to the top cover; It also includes a closing piece, wherein the top cover, the closing piece and the battery cell assembly are arranged in sequence along a first direction, and a connection between the first section and the second section is located on a side of the top cover away from the closing piece.

6. The battery pack according to claim 3, characterized in that: The housing comprises a top cover and a bottom cover, and the first terminal is detachably connected to the top cover; The battery cell assembly, the first circuit board and the bottom cover are arranged in sequence along a first direction, and a connection point between the first section and the second section is located on a side of the first circuit board away from the battery cell assembly.

7. The battery pack according to any one of claims 3 to 6, characterized in that: A buffer is also included. The shell includes a side wall portion. The buffer is arranged between the battery cell assembly and the side wall portion. The second space is formed between the buffer and the side wall portion.

8. The battery pack according to any one of claims 1 to 6, characterized in that: The housing includes a side wall portion having the accommodating space. The side wall portion includes a first side wall and a first extending wall. The first extending wall is connected to an inner surface of the first side wall and forms the second space with the first side wall.

9. The battery pack according to claim 7, characterized in that: The battery pack includes a potting resin, the potting resin is disposed in the first space, and the potting resin bonds the battery cell assembly and the buffer.

10. The battery pack according to claim 9, characterized in that: The battery cell assembly and the first circuit board are arranged along a first direction, and along the first direction, the buffer member includes a third opening and a fourth opening arranged along the first direction; The battery pack further includes a sealing member, the sealing member sealing the third opening, the fourth opening being configured to be injected with the potting resin, and the potting resin bonds the sealing member, the battery cell assembly and the buffer member.

11. The battery pack according to claim 10, characterized in that: Along the first direction, the potting resin does not exceed the surface of the first circuit board facing the battery core assembly.

12. The battery pack according to any one of claims 3 to 7, characterized in that: The housing comprises a side wall portion and a top cover and a bottom cover connected to the side wall portion, the top cover comprises a first receiving cavity, and at least a portion of the first terminal is disposed in the first receiving cavity; A second receiving cavity is provided between the bottom cover and the side wall portion, the first circuit board is arranged in the second receiving cavity, and the second space communicates with the first receiving cavity and the second receiving cavity.

13. The battery pack according to any one of claims 1 to 12, characterized in that: The housing comprises a top cover and a bottom cover, wherein the top cover and the bottom cover are arranged along a first direction, The battery pack further includes a pressure relief portion connected to the top cover, and along the first direction, a projection of the pressure relief portion overlaps with a projection of the second space.

14. The battery pack according to any one of claims 1 to 13, characterized in that: The battery pack includes a second terminal connected to the first circuit board; The housing includes a bottom cover, the bottom cover is detachably connected to the second terminal, the second terminal is exposed from the bottom cover, and the second terminal is configured to be connected to an external device.

15. An electrical equipment, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 14.

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