Battery pack and energy storage equipment

Abstract

The utility model provides a battery pack and energy storage equipment, the battery pack comprises a shell, a battery cell assembly, a circuit board and an electric connecting piece, the battery cell assembly is arranged in the shell, the battery cell assembly comprises a battery cell support and a plurality of battery cells, the battery cell support comprises a main frame body and two protruding frame bodies, the two protruding frame bodies are arranged on one side of the main frame body at intervals, and the two protruding frame bodies are arranged in the shell. The inner wall of the main frame body and the inner walls of the two protruding frame bodies jointly define a containing space for containing the battery cells, and a containing space is formed between the two protruding frame bodies. The circuit board is fixed in the accommodating space. The electric connecting piece is partially contained in the containing space and partially exposed out of the shell. When the battery pack is used, the electric quantity of the energy storage power supply can be expanded by conductively connecting the electric connecting piece with the energy storage power supply, and the battery pack also accommodates the circuit board and the electric connecting piece through the accommodating space, so that the protruding frame body can accommodate an additional battery cell, and the space existing in the shell due to the increase of the height of the electric connecting piece is fully utilized; and the space utilization rate is further improved.

Description

Technical Field

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

[0002] Current energy storage power supplies can be expanded with external battery packs. These typically consist of a housing, a circuit board, a cell holder, and several cells housed within the holder. Typically, the circuit board is placed on one side of the cell holder, then enclosed by the housing to form the entire battery pack.

[0003] In the related art, there is an electrical connection method that uses the electrical connector of the battery pack to connect to the energy storage power supply. The electrical connector is set on the battery cell bracket, but the height of the electrical connector is usually relatively high, so the height of the outer shell must also be increased accordingly, resulting in unused space inside the outer shell due to the increased height, thereby reducing space utilization. Utility Model Content

[0004] In view of this, the present application provides a battery pack and energy storage device that can improve space utilization.

[0005] In one embodiment of the present application, a battery pack is provided, comprising a housing, a cell assembly, a circuit board, and an electrical connector. The cell assembly is disposed within the housing, and the cell assembly includes a cell holder and a plurality of cells. The cell holder includes a main frame and two protruding frames, the two protruding frames being spaced apart on one side of the main frame. The inner wall of the main frame and the inner walls of the two protruding frames are jointly arranged to form a storage space for each cell, and a storage space is formed between the two protruding frames. The circuit board is fixed within the storage space. The electrical connector is partially housed within the storage space and partially exposed to the housing. The electrical connector, the circuit board, and the plurality of cells are conductively connected.

[0006] When the battery pack provided by the present application is in use, it can be conductively connected to an external energy storage power source through the electrical connector exposed on the outer shell, thereby expanding the capacity of the energy storage power source. The battery pack also uses the structural design of the main frame and the two protruding frames, which not only forms a storage space between the two protruding frames to accommodate circuit boards and electrical connectors, but also enables the protruding frames to accommodate additional battery cells, thereby making full use of the space inside the outer shell due to the increased height of the electrical connector, thereby improving the space utilization of the battery pack.

[0007] In some embodiments, each battery cell is cylindrical, and the axes of the battery cells in the accommodating space are parallel. The two protruding frames are arranged on one side of the main frame along the first direction and respectively on opposite sides of the main frame along the second direction. The first direction is perpendicular to the second direction. The multiple battery cells accommodated in the main frame form at least one layer along the first direction, and the battery cells in each layer are arranged along the second direction.

[0008] In some embodiments, each protruding frame accommodates at least one battery cell, and the at least one battery cell in each protruding frame is arranged along the second direction.

[0009] In some embodiments, each battery cell in the protruding frame is arranged along a first direction with a battery cell in the main frame that is closest to it.

[0010] In some embodiments, each battery cell in the protruding frame is closest to two adjacent battery cells in the main frame and the distances are the same.

[0011] In some embodiments, the two protruding frames are detachably connected to the main frame, and the positions of the two protruding frames relative to the main frame are adjustable.

[0012] In some embodiments, the battery cell holder is provided with a plurality of supporting parts in the receiving space, the plurality of supporting parts support the circuit board, and the circuit board is fixed to the supporting parts.

[0013] In some embodiments, the electrical connector includes a fixing portion and multiple pins. The fixing portion is arranged on the battery cell holder and located in the storage space. The multiple pins are arranged on the fixing portion and can move relative to the fixing portion. One end of the pin away from the fixing portion is exposed to the outer shell.

[0014] In some embodiments, the main frame and the two protruding frames have the same extension direction, the cell holder includes a first sub-frame and a second sub-frame, and the first sub-frame and the second sub-frame are spliced ​​along the extension direction to form the cell holder.

[0015] In one embodiment of the present application, an energy storage device is further provided. The energy storage device includes an energy storage power supply and a battery pack according to any of the above embodiments. The battery pack is conductively connected to the energy storage power supply via an electrical connector exposed on the outer shell.

[0016] When the energy storage device provided in the present application is in use, the electrical connector exposed on the outer shell is used to conductively connect to the energy storage power source, thereby expanding the capacity of the energy storage power source in the battery pack. The battery pack also forms a storage space between the two protruding frames to accommodate the circuit board and the electrical connector through the structural design of the main frame and the two protruding frames, and also enables the protruding frames to accommodate additional battery cells, thereby making full use of the space inside the outer shell due to the increased height of the electrical connector, thereby improving the space utilization rate of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of an energy storage device in one embodiment of the present application.

[0018] Figure 2 for Figure 1 A three-dimensional image of the battery pack.

[0019] Figure 3 for Figure 2 Exploded view of the battery pack.

[0020] Figure 4 for Figure 3 A three-dimensional view of the battery cell assembly, circuit board and electrical connectors.

[0021] Figure 5 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0022] Figure 6 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0023] Figure 7 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0024] Figure 8 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0025] Figure 9 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0026] Figure 10 for Figure 4 A three-dimensional image of the battery cell holder.

[0027] Figure 11 for Figure 10 Exploded view of the cell holder.

[0028] Figure 12 Schematic diagram of the arrangement structure of each battery cell in a battery cell assembly in one embodiment of the present application.

[0029] Description of main component symbols

[0030] 100-Battery pack 200-Energy storage device 201-Energy storage power supply

[0031] 10-battery core assembly 11-battery core bracket 111-main frame

[0032] 112- protruding frame 113- accommodating space 114- storage space

[0033] 12-battery core 13-support part 131-column

[0034] 132-first reinforcement rib 133-first mounting hole 14-first subframe

[0035] 15-Second sub-rack 20-Circuit board 21-Second mounting hole

[0036] 30-Electrical connector 31-Fixed portion 32-Pin

[0037] 40-housing 50-locking piece 16-third mounting hole

[0038] 1111-second reinforcing rib 115-heat dissipation hole 17-cylinder wall. DETAILED DESCRIPTION

[0039] The technical solution of the present application will be described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, rather than all the implementation modes.

[0040] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Current energy storage power supplies can be expanded with external battery packs. These typically consist of a housing, a circuit board, a cell holder, and several cells housed within the holder. Typically, the circuit board is placed on one side of the cell holder, then enclosed by the housing to form the entire battery pack.

[0043] In the related art, there is an electrical connection method that uses the electrical connector of the battery pack to connect to the energy storage power supply. The electrical connector is set on the battery cell bracket, but the height of the electrical connector is usually relatively high, so the height of the outer shell must also be increased accordingly, resulting in unused space inside the outer shell due to the increased height, thereby reducing space utilization.

[0044] In view of this, the present application provides a battery pack and energy storage device that can improve space utilization. The battery pack includes a shell, a battery cell assembly, a circuit board and an electrical connector. The battery cell assembly is arranged in the shell. The battery cell assembly includes a battery cell holder and a plurality of battery cells. The battery cell holder includes a main frame and two protruding frames. The two protruding frames are spaced apart on one side of the main frame. The inner wall of the main frame and the inner walls of the two protruding frames are jointly enclosed to form a storage space for each battery cell. A storage space is formed between the two protruding frames. The circuit board is fixed in the storage space. The electrical connector is partially accommodated in the storage space and partially exposed to the shell. The electrical connector, the circuit board and the plurality of battery cells are conductively connected.

[0045] When the battery pack provided by the present application is in use, it can be conductively connected to an external energy storage power source through the electrical connector exposed on the outer shell, thereby expanding the capacity of the energy storage power source. The battery pack also uses the structural design of the main frame and the two protruding frames, which not only forms a storage space between the two protruding frames to accommodate circuit boards and electrical connectors, but also enables the protruding frames to accommodate additional battery cells, thereby making full use of the space inside the outer shell due to the increased height of the electrical connector, thereby improving the space utilization of the battery pack.

[0046] The following is combined with Figures 1 to 12 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0047] like Figures 1 to 3 As shown, some embodiments of the present application provide a battery pack 100 and an energy storage device 200. The energy storage device 200 includes an energy storage power supply 201 and a battery pack 100. The battery pack 100 is detachably electrically connected to 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 achieve power expansion through the external battery pack 100.

[0048] Exemplarily, the energy storage device 200 may be a portable power source used in outdoor scenarios, or a home energy storage system for storing energy for the home, etc. The energy storage device 200 may power external devices, or the external devices may charge the energy storage device 200.

[0049] In some embodiments, as Figure 1 、 Figure 3 and Figure 4As shown, the battery pack 100 includes a cell assembly 10, a circuit board 20, an electrical connector 30, and a housing 40. The cell assembly 10 and the circuit board 20 are disposed within the housing 40. The electrical connector 30 is partially disposed within the housing 40 and partially exposed outside the housing 40. The battery pack 100 is electrically connected to the energy storage power source 201 via the portion of the electrical connector 30 exposed outside the housing 40. The cell assembly 10 includes a cell holder 11 and a plurality of cells 12. The cell holder 11 includes a main frame 111 and two protruding frames 112. The two protruding frames 112 are spaced apart on one side of the main frame 111. The inner wall of the main frame 111 and the inner walls of the two protruding frames 112 together enclose a receiving space 113 for receiving the plurality of cells 12. A storage space 114 is formed between the two protruding frames 112. The circuit board 20 is fixed to the main frame 111 and stored in the storage space 114. The electrical connector 30 is fixed to the circuit board 20 or the main frame 111, and the portion of the electrical connector 30 within the housing 40 is also stored in the storage space 114. The electrical connector 30, the circuit board 20, and the plurality of battery cells 12 are electrically connected. The circuit board 20 can be used to control the charging and discharging of the battery cells 12.

[0050] During use, the battery pack 100 can be electrically connected to the energy storage power source 201 via the electrical connector 30 exposed from the outer casing 40. This not only expands the capacity of the energy storage power source 201 but also improves ease of assembly and disassembly between the battery pack 100 and the energy storage power source 201. Furthermore, the presence of the electrical connector 30 requires the height of the outer casing 40 to be increased relative to the main frame 111 to accommodate the electrical connector 30. However, if the space created by the increased height of the outer casing 40 were solely used to accommodate the electrical connector 30, space utilization would be low. Therefore, the battery pack 100 utilizes the structural design of the main frame 111 and the two protruding frames 112. This not only creates a storage space 114 between the two protruding frames 112 to accommodate the circuit board 20 and the electrical connector 30, but also allows the protruding frames 112 to accommodate additional battery cells 12. This fully utilizes the space created by the increased height of the outer casing 40 due to the installation of the electrical connector 30, thereby improving the space utilization of the battery pack 100.

[0051] In some embodiments, as Figure 4 、 Figure 5 and Figure 6As shown, each battery cell 12 is a cylindrical battery cell, and the axial directions of the battery cells 12 in the accommodating space 113 are arranged parallel to each other. Two protruding frames 112 are arranged on one side of the main frame 111 along the first direction X and respectively on opposite sides of the main frame 111 along the second direction Y, and the first direction X is perpendicular to the second direction Y. The multiple battery cells 12 accommodated in the main frame 111 form at least one layer along the first direction X, and the battery cells 12 in each layer are arranged along the second direction Y, so that the battery cells 12 in the main frame 111 are arranged more neatly, so as to facilitate the installation of the battery cells 12. It should be noted that the axial directions of the battery cells 12 are parallel to each other, which means that they are parallel within a certain error range, not absolutely parallel.

[0052] Alternatively, as Figure 5 and Figure 6 As shown, the plurality of battery cells 12 housed within the main frame 111 can form one, two, or more layers in the first direction X, as long as the battery pack 100 can meet its capacity requirements. It is understood that when the battery cells 12 within the main frame 111 form only one layer, the height of the main frame 111 is smaller than when the battery cells 12 within the main frame 111 form two or more layers, thereby reducing the overall height of the battery pack 100 and the volume of the battery pack 100.

[0053] Alternatively, as Figure 6 and Figure 7 As shown, when the plurality of battery cells 12 in the main frame 111 form two or more layers in the first direction X, the plurality of battery cells 12 in each layer are aligned vertically along the first direction X, as shown in FIG. Figure 6 As shown, the multiple battery cells 12 in the main frame 111 are neatly arranged along the first direction X and the second direction Y, which can facilitate structural design or installation; or, the multiple battery cells 12 in two adjacent layers are staggered, such as Figure 7 As shown, the total height of the multi-layer battery cells 12 in the main frame 111 is made smaller, thereby reducing the height of the main frame 111 and further reducing the overall height of the battery pack 100.

[0054] In some embodiments, as Figure 4 、 Figure 5 and Figure 8 As shown, each protruding frame 112 houses at least one battery cell 12, and the at least one battery cell 12 within each protruding frame 112 is arranged along the second direction Y. Because the total height of the portion of the circuit board 20 and the electrical connector 30 located within the housing 40 is approximately equal to the diameter of a battery cell 12, the battery cells 12 within the protruding frame 112 can be arranged in one layer along the first direction X to fully utilize the space created by the increased height of the housing 40, eliminating the need for two or more layers.

[0055] It can be understood that in some embodiments, if the total height of the portion of the circuit board 20 and the electrical connector 30 located within the housing 40 exceeds the diameter of a battery cell 12, for example, is close to twice or more than twice the diameter of the battery cell 12, then the battery cells 12 within the protruding frame 112 can be formed into two or more layers along the first direction X to fully utilize the space generated by the increased height of the housing 40.

[0056] Alternatively, as Figure 5 and Figure 8 As shown, the number of cells 12 contained in each protruding frame 112 can be one, two, or more than two. For example, each protruding frame 112 contains only one cell 12. Figure 5 As shown, the overall width of the battery pack 100 along the second direction Y can be reduced; or, each protruding frame 112 is provided with only two battery cells 12, such as Figure 8 As shown, the power of the battery pack 100 can be increased.

[0057] In some embodiments, as Figure 5 and Figure 8 As shown, each battery cell 12 in the protruding frame 112 is arranged along the first direction X with a battery cell 12 in the main frame 111 that is closest to it. That is, the battery cells 12 in the protruding frame 112 and the battery cells 12 in the main frame 111 are aligned vertically along the first direction X, so that the arrangement of the battery cells 12 is more neat, which is convenient for structural design or installation.

[0058] In some embodiments, as Figure 9 As shown, each battery cell 12 in the protruding frame 112 is closest to and has the same distance from two adjacent battery cells 12 in the main frame 111. That is, the battery cells 12 in the protruding frame 112 and the battery cells 12 in the main frame 111 are staggered, which can reduce the overall height of the battery pack 100 and further reduce the volume of the battery pack 100.

[0059] In some embodiments, the two protruding frames 112 are detachably connected to the main frame 111, and the positions of the two protruding frames 112 relative to the main frame 111 are adjustable so as to adjust the size of the storage space 114 to adapt to the sizes of different circuit boards 20 or electrical connectors 30, thereby improving the flexibility of the battery cell holder 11.

[0060] Optionally, the protruding frame 112 is connected to the main frame 111 via a buckle and a slot. For example, the main frame 111 is provided with a plurality of buckles arranged along the second direction Y, and the protruding frame 112 is provided with a slot. The slot of the protruding frame 112 can be selectively engaged with the buckle corresponding to the desired position to fix the protruding frame 112 to the desired position. Alternatively, the protruding frame 112 is connected to the main frame 111 via screws. For example, the main frame 111 is provided with a plurality of screw holes arranged along the second direction Y, and the protruding frame 112 is provided with a hole. The hole of the protruding frame 112 can be selectively aligned with the screw hole corresponding to the desired position, and the screw is passed through the hole and threaded into the screw hole to fix the protruding frame 112 to the desired position.

[0061] In some embodiments, as Figure 4 and Figure 10 As shown, the cell holder 11 is provided with a plurality of support portions 13 within the storage space 114. The plurality of support portions 13 are used to support the circuit board 20, which is fixedly connected to the support portions 13. Optionally, the support portion 13 includes a column 131, which is provided in a first mounting hole 133. The circuit board 20 is provided with a second mounting hole 21, which is aligned with the first mounting hole 133. The battery pack 100 also includes a locking member 50, which passes through the second mounting hole 21 and extends into the first mounting hole 133 to secure the circuit board 20 and the column 131, thereby securing the circuit board 20 and the cell holder 11. Further optionally, the support portion 13 also includes a first reinforcing rib 132, which connects the column 131 to the body of the cell holder 11 to enhance the stability of the column 131, thereby enhancing the stability of the circuit board 20.

[0062] In some embodiments, as Figure 1 and Figure 4 As shown, the electrical connector 30 includes a fixing portion 31 and a plurality of pins 32. The fixing portion 31 is disposed on the battery cell holder 11 and is located within the storage space 114. The plurality of pins 32 are disposed on the fixing portion 31 and are movable relative to the fixing portion 31 in a first direction X. The ends of the pins 32 proximal to the circuit board 20 are electrically connected to the circuit board 20, while the ends of the pins 32 distal to the fixing portion 31 are exposed from the housing 40 to electrically connect to the energy storage power supply 201. The fixing portion 31 and the pins 32 facilitate assembly and disassembly between the battery pack 100 and the energy storage power supply 201.

[0063] In some embodiments, as Figure 10 and Figure 11As shown, the main frame 111 and the two protruding frames 112 extend in the same direction and are all arranged to extend along the third direction Z. The battery cell holder 11 includes a first sub-frame 14 and a second sub-frame 15. The first sub-frame 14 and the second sub-frame 15 are spliced ​​along the third direction Z to form the battery cell holder 11. The first sub-frame 14 and the second sub-frame 15 are spliced ​​to form an accommodating space 113. The battery cell holder 11 uses the first sub-frame 14 and the second sub-frame 15 to enable the battery cell 12 to be installed in the accommodating space 113 or to be removed from the accommodating space 113.

[0064] Optionally, the first sub-frame 14 and the second sub-frame 15 are each provided with a plurality of corresponding third mounting holes 16, each extending along the third direction Z. After the first sub-frame 14 and the second sub-frame 15 are joined, the two corresponding third mounting holes 16 are aligned. The battery pack 100 further includes a plurality of locking members, each of which is provided in the aligned first sub-frame 14 and second sub-frame 15 to secure the first sub-frame 14 and the second sub-frame 15. Exemplarily, the locking members are screws, and the third mounting holes 16 have internal threads. The locking members are threadedly connected to the walls of the third mounting holes 16 to secure the first sub-frame 14 and the second sub-frame 15.

[0065] Optionally, each of the first sub-frame 14 and the second sub-frame 15 is provided with a cylindrical wall 17 extending along the third direction Z. The third mounting hole 16 is provided in the cylindrical wall 17 and arranged axially along the cylindrical wall 17. Furthermore, optionally, since there is a gap between the cylindrical battery cells 12, to improve space utilization, the cylindrical wall 17 can be provided within the accommodating space 113 and located in the gap between two adjacent battery cells 12, thereby avoiding the cylindrical wall 17 occupying additional space in the accommodating space 113. Furthermore, optionally, the cylindrical wall 17 can be provided outside the accommodating space 113, on opposite sides of the main frame 111 away from the protruding frame 112, and on opposite sides of the two protruding frame 112 away from the main frame 111. This ensures a more stable connection between the first sub-frame 14 and the second sub-frame 15, thereby enhancing the structural strength of the battery cell holder 11.

[0066] In some embodiments, as Figure 12 As shown, the battery cell 12 may be a sheet-shaped battery cell. The plurality of sheet-shaped battery cells in the main frame 111 may be stacked along the first direction X, and the plurality of sheet-shaped battery cells in the protruding frame 112 may be stacked along the first direction X or the second direction Y.

[0067] In some embodiments, as Figure 10 and Figure 11As shown, a plurality of second reinforcing ribs 1111 are provided on one side of the main frame 111 within the receiving space 114. The plurality of second reinforcing ribs 1111 are crisscrossed to enhance the strength of the main frame 111. Since the circuit board 20 is supported on one side of the main frame 111 within the receiving space 114, the second reinforcing ribs 1111 can enhance the stability of the main frame 111 in supporting the circuit board 20.

[0068] In some embodiments, the surface of the cell holder 11 is provided with a plurality of heat dissipation holes 115, which connect the accommodating space 113 with the outside of the accommodating space 113 to dissipate heat from the cell 12 within the accommodating space 113. Optionally, the second reinforcing ribs 1111 are crisscrossed to form a grid, with each grid having at least one heat dissipation hole 115, thereby improving strength while dissipating heat from the cell 12 within the main frame 111. Furthermore, the heat dissipation holes 115 are optionally provided on the side of the protruding frame 112 facing away from the main frame 111 to dissipate heat from the cell 12 protruding from the frame 112.

[0069] In some embodiments, the battery cell holder 11 includes a main frame 111 and three or more protruding frames 112, and each protruding frame 112 is spaced apart on one side of the main frame 111. The inner wall of the main frame 111 and the inner wall of each protruding frame 112 are jointly enclosed to form a accommodating space 113, and a storage space 114 is formed between every two adjacent protruding frames 112. Each storage space 114 can accommodate a circuit board 20 and an electrical connector 30, so that the battery cell holder 11 can accommodate two or more circuit boards 20 and electrical connectors 30.

[0070] In addition, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit 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 disclosure of the present application.

Claims

1. A battery pack, characterized in that: include: shell; A battery cell assembly is provided in the housing, the battery cell assembly includes a battery cell holder and a plurality of battery cells, the battery cell holder includes a main frame and two protruding frames, the two protruding frames are spaced apart and arranged on one side of the main frame, the inner wall of the main frame and the inner walls of the two protruding frames are jointly enclosed to form an accommodation space for each of the battery cells, and a storage space is formed between the two protruding frames; A circuit board is fixed in the storage space; and An electrical connector is partially housed in the housing space and partially exposed outside the housing. The electrical connector, the circuit board, and the plurality of battery cells are conductively connected.

2. The battery pack according to claim 1, wherein: Each of the battery cells is columnar, and the axial directions of the battery cells in the accommodating space are parallel. The two protruding frames are arranged on one side of the main frame along the first direction and respectively on opposite sides of the main frame along the second direction. The first direction is perpendicular to the second direction. The multiple battery cells accommodated in the main frame form at least one layer along the first direction, and the battery cells in each layer are arranged along the second direction.

3. The battery pack according to claim 2, wherein: Each of the protruding frames accommodates at least one of the battery cores, and the at least one battery core in each of the protruding frames is arranged along the second direction.

4. The battery pack according to claim 3, wherein: Each of the battery cells in the protruding frame and the battery cell in the main frame closest to it are arranged along the first direction.

5. The battery pack according to claim 3, wherein: Each of the battery cells in the protruding frame is closest to two adjacent battery cells in the main frame and the distances are the same.

6. The battery pack according to any one of claims 1 to 5, wherein: The two protruding frames are detachably connected to the main frame, and the positions of the two protruding frames relative to the main frame are adjustable.

7. The battery pack according to any one of claims 1 to 5, wherein: The battery holder is provided with a plurality of supporting parts in the receiving space, the plurality of supporting parts support the circuit board, and the circuit board is fixed to the supporting parts.

8. The battery pack according to any one of claims 1 to 5, wherein: The electrical connector includes a fixing portion and a plurality of pins. The fixing portion is provided on the battery cell holder and is located in the storage space. The plurality of pins are provided on the fixing portion and can move relative to the fixing portion. One end of the pin away from the fixing portion is exposed on the housing.

9. The battery pack according to any one of claims 1 to 5, wherein: The main frame and the two protruding frames have the same extension direction. The battery cell holder includes a first sub-frame and a second sub-frame. The first sub-frame and the second sub-frame are spliced ​​along the extension direction to form the battery cell holder.

10. An energy storage device, characterized in that: The energy storage device includes an energy storage power supply and a battery pack according to any one of claims 1 to 9, and the battery pack is conductively connected to the energy storage power supply through the electrical connector exposed on the housing.

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