Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises a first waterproof box, a shell and a battery cell module. An assembly space is arranged in the shell. The first waterproof box is located in the assembly space and is in sealed connection with the shell. A sealed space is defined by the first waterproof box and the shell. The battery cell module is arranged in the sealed space; the battery cell module comprises a battery cell, a supporting piece and a switching piece, the positive electrode and the negative electrode of the cell are positioned at the same end of the cell. And a plurality of battery cells are arranged. And the ends of the positive electrodes and the negative electrodes of the plurality of battery cells are fixedly connected to the supporting piece. The switching piece is arranged on the supporting piece. The plurality of battery cells are electrically connected with one another through the adapter sheets, and at least one of the first water insulation box and the shell is fixedly connected with the supporting piece. According to the energy storage equipment provided by the invention, the overall assembly structure can be simplified, and the waterproof performance can be maintained.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to an energy storage device. Background Art

[0002] Energy storage power supplies are widely used in people's lives as a power supply device for household emergency backup and outdoor entertainment operations. Energy storage power supplies usually have multiple battery cells, which will cause safety hazards when exposed to water. Therefore, when designing the assembly structure of the battery cells of energy storage power supplies, it is necessary not only to consider the fixation of multiple battery cells, but also to consider the waterproofness of the battery cells.

[0003] In the related art, in order to ensure better waterproof performance, the waterproof structure of the battery cell is usually more complicated, which will lead to an increase in overall weight and an increase in manufacturing costs. Utility Model Content

[0004] In view of this, the present application provides an energy storage device that can simplify the overall assembly structure and maintain waterproof performance.

[0005] One embodiment of the present application provides an energy storage device. The energy storage device includes a first water-proof box, a shell and a battery cell module. An assembly space is provided in the shell. The first water-proof box is located in the assembly space and is sealed to the shell. The first water-proof box and the shell are surrounded to form a sealed space. The battery cell module is arranged in the sealed space. The battery cell module includes a battery cell, a support and a transfer plate. The positive and negative electrodes of the battery cell are located at the same end of the battery cell. There are multiple battery cells. The ends where the positive and negative electrodes of the multiple battery cells are located are fixedly connected to the support. The transfer plate is arranged on the support. The multiple battery cells are electrically connected to each other through the transfer plate. At least one of the first water-proof box and the shell is fixedly connected to the support.

[0006] In the above embodiment, by providing a battery cell with both the positive and negative electrodes located at the same end, it is only necessary to provide a support member and an adapter plate on the same side of the multiple battery cells to achieve the fixation and electrical connection of the multiple battery cells, thereby simplifying the assembly structure of the battery cell module. The multiple battery cells and the adapter plate are all provided on the support member, and no other structure is required to maintain a stable electrical connection between the multiple battery cells, thereby simplifying the assembly structure of the battery cell module. The first waterproof box is sealed and connected to the shell, thereby separating a sealed space within the assembly space of the shell, and the battery cell module is accommodated in the sealed space, so that the battery cell is waterproofed. In addition, the shell cooperates with the first waterproof box, which not only participates in the fixation of the battery cell module but also participates in the waterproofing of the battery cell module, thereby simplifying the overall assembly structure, thereby reducing the overall weight and reducing the manufacturing cost.

[0007] In some embodiments of the present application, the housing is detachably connected to the first water-blocking box. The energy storage device further includes a seal. The seal is disposed between the first water-blocking box and the housing. The seal is disposed along the connection between the first water-blocking box and the housing.

[0008] In the above embodiment, when the first water-proof box is detached from the shell, the battery module can be moved to the sealed space. By configuring the sealing member, after the first water-proof box is connected to the shell, the sealed space and the assembly space are sealed and separated from each other, thereby protecting the battery module.

[0009] In some embodiments of the present application, one of the first water-isolating box and the housing is provided with a sealing assembly groove, and the other is inserted into the sealing assembly groove, and the sealing member is provided in the sealing assembly groove.

[0010] In the above embodiment, by being arranged in the sealing assembly groove, the sealing member can be driven to move together when the first water-proof box is connected to the shell, thereby improving the accuracy of the sealing member setting position, thereby improving the waterproof effect. In addition, one of the first water-proof box and the shell that is not provided with a sealing assembly groove is inserted into the sealing assembly groove, which can stop the sealing member on the one hand and reduce the possibility of the sealing member being separated from the sealing assembly groove, and on the other hand, can squeeze the sealing member, thereby increasing the contact surface area of ​​the sealing member and the first water-proof box and the shell, thereby facilitating improving the waterproof effect.

[0011] In some embodiments of the present application, the first water-proof box is provided with a first fixing portion, and the shell is provided with a second fixing portion, and the first fixing portion is connected to the second fixing portion to connect the first water-proof box to the shell.

[0012] In the above embodiment, the first fixing part and the second fixing part are used to achieve a fixed connection between the first waterproof box and the shell, thereby improving the stability of the connection between the first waterproof box and the shell, thereby improving the waterproof effect.

[0013] In some embodiments of the present application, the housing includes an outer shell and a second watertight box. An assembly space is provided in the outer shell. The second watertight box is located in the assembly space. The first watertight box is sealedly connected to the second watertight box. The second watertight box is sealedly connected to the outer shell. The first watertight box, the outer shell and the second watertight box are surrounded to form a sealed space.

[0014] In the above embodiment, the second waterproof box can be pre-fixed in the assembly space of the outer shell, and the first waterproof box is connected to the second waterproof box, which is conducive to adjusting the connection between the first waterproof box and the shell to an easy-to-operate position, thereby facilitating the sealing of the connection and improving the waterproof effect.

[0015] In some embodiments of the present application, the second water-blocking box and the outer shell are an integrally formed structure.

[0016] In the above embodiment, through integral molding, the second water-blocking box and the outer shell can be easily fixedly connected and sealed, thereby simplifying the assembly steps of the first water-blocking box and the shell.

[0017] In some embodiments of the present application, the housing includes a bottom wall and a side wall. The side wall is arranged around the periphery of the bottom wall. An assembly space is formed between the bottom wall and the side wall. The second watertight box is sealed and connected to the bottom wall.

[0018] In the above embodiment, the side wall and the bottom wall are arranged to form an assembly space, which is convenient for assembling other structures. The second water-proof box is arranged on the bottom wall, and the battery module can be assembled into the second water-proof box along the same assembly direction when entering the assembly space, simplifying the assembly steps.

[0019] In some embodiments of the present application, the housing further comprises reinforcing ribs which connect the bottom wall, the side wall and the second water-isolating box.

[0020] In the above embodiment, reinforcing ribs are provided to fix the bottom wall, the side wall and the second water-blocking box to each other, thereby enhancing the structural strength of the shell and reducing the possibility of deformation of the second water-blocking box when the first water-blocking box is connected to the shell. This allows the connection between the first water-blocking box and the second water-blocking box to maintain a sealing effect and improve waterproof performance.

[0021] In some embodiments of the present application, the support member is provided with a third fixing portion, the bottom wall is provided with a fourth fixing portion, and the third fixing portion is connected to the fourth fixing portion to connect the support member to the bottom wall.

[0022] In the above embodiment, the third fixing part and the fourth fixing part are used to achieve a fixed connection between the support member and the bottom wall, thereby improving the stability of the connection between the battery module and the shell and reducing the possibility of deformation of the second waterproof box when the battery module is connected to the shell, thereby improving the waterproof effect.

[0023] In some embodiments of the present application, the bottom wall is provided with a positioning portion. There are multiple positioning portions. The multiple positioning portions are located in the sealed space. Each battery cell is positioned with the bottom wall by at least one positioning portion.

[0024] In the above embodiment, by providing the positioning portion, on the one hand, it is helpful to fix the battery cell and the shell to each other, so as to enhance the structural strength of the shell and reduce the possibility of deformation of the shell, thereby improving the waterproof performance; on the other hand, it is helpful to quickly position the battery cell module and the shell, facilitate the connection between the support and the shell, thereby improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0026] Figure 1 is a three-dimensional schematic diagram of an energy storage device provided in one embodiment of the present application;

[0027] Figure 2 yes Figure 1Schematic diagram of the explosion of the energy storage device;

[0028] Figure 3 yes Figure 2 An assembly diagram of an energy storage device with a top cover omitted;

[0029] Figure 4 yes Figure 3 A schematic diagram of the structure of the middle shell;

[0030] Figure 5 yes Figure 3 Schematic cross-sectional view of section AA;

[0031] Figure 6 yes Figure 5 Magnified view of part B.

[0032] Main component symbols

[0033] 100-Energy Storage Equipment

[0034] 10-housing 20-cell module 30-first water-proof box

[0035] 40-seal 50-top cover

[0036] 101-assembly space 102-housing 103-second water-proof box

[0037] 104-reinforcement rib 201-battery core 202-support

[0038] 203- adapter plate 301- sealed space 302- sealed assembly groove

[0039] 303-first fixing part

[0040] 1021- bottom wall 1022- side wall 1023- fourth fixing portion

[0041] 1024- positioning part 1031- second fixing part 2021- third fixing part DETAILED DESCRIPTION

[0042] 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.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. 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.

[0044] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] Furthermore, the terms “first,” “second,” “third,” etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0046] Energy storage power supplies are widely used in people's lives as a power supply device for household emergency and outdoor entertainment operations. Energy storage power supplies usually have multiple battery cells, which will cause safety hazards when exposed to water. Therefore, when designing the assembly structure of the battery cells of energy storage power supplies, it is necessary not only to

[0047] In addition to the fixation of multiple battery cells, the waterproofing of the battery cells also needs to be considered.

[0048] In the related art, in order to ensure better waterproof performance, the waterproof structure of the battery cell is usually more complicated, which will lead to an increase in overall weight and an increase in manufacturing costs.

[0049] Therefore, the embodiment of the present application provides an energy storage device that can simplify the overall assembly structure and maintain waterproof performance.

[0050] The energy storage device includes a first waterproof box, a shell and a battery cell module. An assembly space is provided in the shell. The first waterproof box is located in the assembly space and is sealed to the shell. The first waterproof box and the shell are surrounded to form a sealed space. The battery cell module is arranged in the sealed space. The battery cell module includes a battery cell, a support and a transfer plate. The positive and negative electrodes of the battery cell are located at the same end of the battery cell. There are multiple battery cells. The ends where the positive and negative electrodes of the multiple battery cells are located are fixedly connected to the support. The transfer plate is arranged on the support. The multiple battery cells are electrically connected to each other through the transfer plate. At least one of the first waterproof box and the shell is fixedly connected to the support.

[0051] By providing a battery cell with both the positive and negative electrodes located at the same end, it is only necessary to provide a support member and an adapter plate on the same side of the multiple battery cells to achieve the fixation and electrical connection of the multiple battery cells, thereby simplifying the assembly structure of the battery cell module. The multiple battery cells and the adapter plate are all provided on the support member, and no other structure is required to maintain a stable electrical connection between the multiple battery cells, thereby simplifying the assembly structure of the battery cell module. The first waterproof box is sealed and connected to the shell, thereby separating a sealed space within the assembly space of the shell, and the battery cell module is accommodated in the sealed space, so that the battery cell is waterproofed. In addition, the shell cooperates with the first waterproof box, which not only participates in the fixation of the battery cell module but also participates in the waterproofing of the battery cell module, thereby simplifying the overall assembly structure, thereby reducing the overall weight and reducing the manufacturing cost.

[0052] 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.

[0053] See also Figure 1One embodiment of the present application provides an energy storage device 100. The energy storage device 100 has the functions of storing and discharging electricity, and is used for home power backup, production unit power backup, outdoor work, outdoor entertainment, etc.

[0054] See also Figure 2 In some embodiments, the energy storage device 100 includes a housing 10 and a battery module 20. An assembly space 101 is provided in the housing 10. The battery module 20 is provided in the assembly space 101. The housing 10 is used to protect the battery module 20.

[0055] In some embodiments, the energy storage device 100 includes a power conversion module (not shown). The power conversion module is arranged in the assembly space 101, and the housing 10 protects the power conversion module. The power conversion module is electrically connected to the battery module 20, and the power conversion module is used to realize the AC-DC conversion control of the output current of the battery module 20. The energy storage device with a power conversion module can be a small portable mobile power supply, a household energy storage power supply, an industrial and commercial energy storage power supply, or a container-type energy storage power supply.

[0056] In some embodiments, the power conversion module can be omitted. The energy storage device 100 without the power conversion module can be used independently. The energy storage device 100 without the power conversion module can usually only output direct current. When the energy storage device 100 without the power conversion module is used independently, it can be used in coordination with the energy storage device 100 with the power conversion module as a power supply system that provides additional battery capacity.

[0057] See also Figure 5 In some embodiments, the battery cell module 20 includes a battery cell 201, a support member 202, and a transfer plate 203. The positive electrode and the negative electrode of the battery cell 201 are located at the same end of the battery cell 201. A plurality of battery cells 201 are provided. The ends where the positive electrodes and the negative electrodes of the plurality of battery cells 201 are located are fixedly connected to the support member 202. The transfer plate 203 is provided on the support member 202. The plurality of battery cells 201 are electrically connected to each other through the transfer plate 203.

[0058] By providing a battery cell 201 with both the positive and negative electrodes at the same end, it is only necessary to provide a support member 202 and a transfer plate 203 on the same side of the multiple battery cells 201 to achieve the fixation and electrical connection of the multiple battery cells 201, thereby simplifying the assembly structure of the battery cell module 20. The multiple battery cells 201 and the transfer plate 203 are all provided on the support member 202, and stable electrical connection between the multiple battery cells 201 can be maintained without other structures, thereby simplifying the assembly structure of the battery cell module 20.

[0059] See also Figure 2 and Figure 3In some embodiments, the energy storage device 100 further includes a first water-proof box 30. The first water-proof box 30 is located in the assembly space 101 and is sealed and connected to the housing 10. The first water-proof box 30 and the housing 10 are arranged to form a sealed space 301. The battery cell module 20 is arranged in the sealed space 301. At least one of the first water-proof box 30 and the housing 10 is fixedly connected to the support member 202.

[0060] The first water-proof box 30 is sealed and connected to the shell 10, thereby separating a sealed space 301 in the assembly space 101 of the shell 10, and accommodating the battery cell module 20 in the sealed space 301, so that the battery cell 201 is waterproofed. The power conversion module is separated from the battery cell module 20, reducing the impact of assembling the power conversion module on the sealed space 301, thereby improving the waterproof effect of the sealed space 301 on the battery cell module 20. In addition, the shell 10 cooperates with the first water-proof box 30, which not only participates in the fixation of the battery cell module 20 but also participates in the waterproofing of the battery cell module 20, simplifies the overall assembly structure, thereby reducing the overall weight and manufacturing cost. The shell 10 itself can form a first layer of protection, and the second layer of protection is formed by the sealing cooperation of the first water-proof box 30 and the shell 10, so that the energy storage device 100 can achieve a waterproof effect of IPX4 or above.

[0061] See also Figure 4 In some embodiments, the housing 10 includes an outer shell 102 and a second watertight box 103. An assembly space 101 is provided in the outer shell 102. The second watertight box 103 is located in the assembly space 101. The first watertight box 30 is sealedly connected to the second watertight box 103. The second watertight box 103 is sealedly connected to the outer shell 102. The first watertight box 30, the outer shell 102 and the second watertight box 103 are surrounded to form a sealed space 301. Any one of the first watertight box 30, the outer shell 102 and the second watertight box 103 is connected to the support member 202.

[0062] The second waterproof box 103 can be pre-fixed in the assembly space 101 of the outer shell 102, and the first waterproof box 30 is connected to the second waterproof box 103, which is conducive to adjusting the connection between the first waterproof box 30 and the shell 10 to an easy-to-operate position, thereby facilitating the sealing of the connection and improving the waterproof effect.

[0063] See also Figure 4 In some embodiments, the second water-blocking box 103 and the housing 102 are integrally formed. Through integral forming, the second water-blocking box 103 and the housing 102 can be easily fixedly connected and sealed, simplifying the assembly steps of the first water-blocking box 30 and the housing 10. As an exemplary example, the second water-blocking box 103 and the housing 102 are integrally formed by injection molding.

[0064] See also Figures 2 to 4In some embodiments, the housing 10 is detachably connected to the first watertight box 30. The energy storage device 100 further includes a seal 40. The seal 40 is disposed between the first watertight box 30 and the housing 10. The seal 40 is disposed along the connection between the first watertight box 30 and the housing 10. It can be understood that in some embodiments, the first watertight box 30 is detachably connected to the second watertight box 103.

[0065] When the first water-proof box 30 is detached from the housing 10, the cell module 20 can be moved to the sealed space 301. By configuring the sealing member 40, after the first water-proof box 30 is connected to the housing 10, the sealed space 301 and the assembly space 101 are sealed and separated from each other, thereby protecting the cell module 20.

[0066] See also Figure 5 and Figure 6 In some embodiments, one of the first water-isolating box 30 and the housing 10 is provided with a sealing assembly groove 302 . The other is inserted into the sealing assembly groove 302 , and the sealing member 40 is provided in the sealing assembly groove 302 .

[0067] By being arranged in the sealing assembly groove 302, the sealing member 40 can be driven to move together when the first water-proof box 30 is connected to the housing 10, thereby improving the accuracy of the setting position of the sealing member 40, thereby improving the waterproof effect. In addition, the one of the first water-proof box 30 and the housing 10 that is not provided with the sealing assembly groove 302 is inserted into the sealing assembly groove 302, which can stop the sealing member 40 on the one hand, reduce the possibility of the sealing member 40 being separated from the sealing assembly groove 302, and on the other hand, can squeeze the sealing member 40, thereby increasing the contact surface area of ​​the sealing member 40 with the first water-proof box 30 and the housing 10, thereby facilitating the improvement of the waterproof effect.

[0068] See also Figure 6 It is understandable that, in some embodiments, the first watertight box 30 is provided with a sealing assembly groove 302 , and the second watertight box 103 is inserted into the sealing assembly groove 302 of the first watertight box 30 .

[0069] See also Figure 3 and Figure 5 In some embodiments, the first water-blocking box 30 is provided with a first fixing portion 303. The housing 10 is provided with a second fixing portion 1031. The first fixing portion 303 is connected to the second fixing portion 1031 to connect the first water-blocking box 30 to the housing 10.

[0070] The first fixing portion 303 and the second fixing portion 1031 are used to achieve a fixed connection between the first waterproof box 30 and the housing 10, thereby improving the stability of the connection between the first waterproof box 30 and the housing 10 and thus improving the waterproof effect.

[0071] See also Figure 4In some embodiments, the second water-blocking box 103 is provided with a second fixing portion 1031. Compared with the second fixing portion 1031 being provided on the housing 102, it is advantageous to shorten the distance between the first fixing portion 303 and the second fixing portion 1031 and reduce the size of the first fixing portion 303 and the second fixing portion 1031.

[0072] See also Figure 3 and Figure 5 In some embodiments, the first fixing portion 303 is protruded from a side of the first water-blocking box 30 away from the sealed space 301 , and the second fixing portion 1031 is protruded from a side of the second water-blocking box 103 away from the sealed space 301 .

[0073] See also Figure 6 In some embodiments, the first fixing portion 303 and the second fixing portion 1031 are connected by bolts. In other embodiments, the first fixing portion 303 and the second fixing portion 1031 can be connected by snap-fit ​​or magnetic attraction. Alternatively, the first fixing portion 303 and the second fixing portion 1031 can be omitted, and the first watertight box 30 and the second watertight box 103 are directly threaded.

[0074] See also Figure 2 , Figure 5 and Figure 6 In some embodiments, the sealing assembly groove 302 extends through the first fixing portion 303 , and the sealing member 40 extends through the first fixing portion 303 and the second fixing portion 1031 .

[0075] See also Figure 4 In some embodiments, the housing 102 includes a bottom wall 1021 and a side wall 1022. The side wall 1022 is disposed around the periphery of the bottom wall 1021. The bottom wall 1021 and the side wall 1022 enclose an assembly space 101. The second water-blocking box 103 is sealed and connected to the bottom wall 1021.

[0076] The side wall 1022 and the bottom wall 1021 are arranged to form an assembly space 101, which is convenient for assembling other structures. The second water-proof box 103 is arranged on the bottom wall 1021, and the battery module 20 can be assembled into the second water-proof box 103 along the same assembly direction when entering the assembly space 101, simplifying the assembly steps.

[0077] See also Figure 3 and Figure 5 In some embodiments, the first watertight box 30, the second watertight box 103 and a portion of the bottom wall 1021 are arranged to form a sealed space 301. In other embodiments, the first watertight box 30, the second watertight box 103, a portion of the bottom wall 1021 and a portion of the side wall 1022 are arranged to form a sealed space 301.

[0078] See also Figures 3 to 5In some embodiments, the housing 10 further includes a reinforcing rib 104. The reinforcing rib 104 connects the bottom wall 1021, the side wall 1022, and the second watertight box 103. By providing the reinforcing rib 104, the bottom wall 1021, the side wall 1022, and the second watertight box 103 are fixed to each other, thereby enhancing the structural strength of the housing 10, reducing the possibility of deformation of the second watertight box 103 when the first watertight box 30 is connected to the housing 10, and enabling the connection between the first watertight box 30 and the second watertight box 103 to maintain a sealing effect, thereby improving the waterproof performance.

[0079] It can be understood that in some embodiments, the bottom wall 1021, the side wall 1022, the second water-blocking box 103 and the reinforcing ribs 104 are an integrally formed structure.

[0080] See also Figure 2 and Figure 5 In some embodiments, the support member 202 is provided with a third fixing portion 2021. The bottom wall 1021 is provided with a fourth fixing portion 1023. The third fixing portion 2021 is connected to the fourth fixing portion 1023 to connect the support member 202 to the bottom wall 1021.

[0081] The third fixing part 2021 and the fourth fixing part 1023 are used to achieve a fixed connection between the support member 202 and the bottom wall 1021, thereby improving the stability of the connection between the battery module 20 and the shell 10 and reducing the possibility of deformation of the second waterproof box 103 when the battery module 20 is connected to the shell 10, thereby improving the waterproof effect.

[0082] See also Figure 6 In some embodiments, the third fixing portion 2021 is connected to the fourth fixing portion 1023 by bolts. In other embodiments, the third fixing portion 2021 and the fourth fixing portion 1023 may be connected by snap-fit ​​or magnetic attraction.

[0083] See also Figure 4 In some embodiments, the fourth fixing portion 1023 is a columnar structure, so that it can support the support member 202 , which is helpful to reduce the pressure on the battery cell 201 .

[0084] In other embodiments, the support member 202 is provided with a fifth fixing portion, the second water-blocking box 103 and / or the side wall 1022 is provided with a sixth fixing portion, and the fifth fixing portion and the sixth fixing portion are connected. Alternatively, the support member 202 is provided with a seventh fixing portion, the first water-blocking box 30 is provided with an eighth fixing portion, and the seventh fixing portion and the eighth fixing portion are connected.

[0085] See also Figure 4 In some embodiments, the bottom wall 1021 is provided with a positioning portion 1024 . A plurality of positioning portions 1024 are provided. The plurality of positioning portions 1024 are located in the sealed space 301 . Each battery cell 201 is positioned with the bottom wall 1021 by at least one positioning portion 1024 .

[0086] By setting the positioning portion 1024, on the one hand, it is beneficial to fix the battery cell 201 and the shell 10 to each other, so as to enhance the structural strength of the shell 10 and reduce the possibility of deformation of the shell 10, thereby improving the waterproof performance; on the other hand, it is beneficial to quickly position the battery cell module 20 and the shell 10, which facilitates the connection between the support member 202 and the shell 10, thereby improving the assembly efficiency.

[0087] See also Figure 4 In some embodiments, each positioning portion 1024 is a positioning groove, and each battery cell 201 is inserted into a positioning groove to achieve positioning. In other embodiments, each positioning portion 1024 is a positioning column, and multiple positioning columns are stopped at the peripheral side of a battery cell 201.

[0088] See also Figure 4 In some embodiments, the second water-blocking box 103 is annularly arranged on the bottom wall 1021, and the positioning portion 1024 is located in the annular region of the second water-blocking box 103. As an exemplary example, the annular shape of the second water-blocking box 103 is a circular ring, a triangular ring, a square ring, etc.

[0089] See also Figure 2 In some embodiments, the energy storage device 100 further includes a top cover 50. The top cover 50 is connected to the housing 10, thereby enclosing other structures of the energy storage device 100 in the assembly space 101. It can be understood that in some embodiments, the top cover 50 is connected to the side wall 1022.

[0090] See also Figure 2 and Figure 5 In some embodiments, the energy storage device 100 is assembled as follows: after the battery cell 201, the adapter 203 and the support 202 are fixed, they are transferred to the second water-proof box 103, and each battery cell 201 is correspondingly inserted into a positioning portion 1024. The third positioning portion 1024 and the fourth positioning portion 1024 are connected to fix the battery cell module 20 into the second water-proof box 103. The sealing member 40 is installed in the sealing assembly groove 302, and the first water-proof box 30 and the second water-proof box 103 are connected, so that the second water-proof box 103 is inserted into the sealing assembly groove 302. The first positioning portion 1024 and the second positioning portion 1024 are connected to press the sealing member 40 against the first water-proof box 30 and the second water-proof box 103. Finally, the top cover 50 is connected to the shell 10 to complete the assembly of the energy storage device 100.

[0091] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. An energy storage device, characterized in that: include: The first watertight box; A shell, wherein an assembly space is provided in the shell, the first water-blocking box is located in the assembly space and is sealed with the shell, and the first water-blocking box and the shell are surrounded to form a sealed space; A battery cell module is arranged in the sealed space, and the battery cell module includes a battery cell, a support member and a transfer plate. The positive and negative electrodes of the battery cell are located at the same end of the battery cell. There are multiple battery cells, and the ends where the positive and negative electrodes of the multiple battery cells are located are fixedly connected to the support member. The transfer plate is arranged on the support member, and the multiple battery cells are electrically connected to each other through the transfer plate. At least one of the first water-proof box and the shell is fixedly connected to the support member.

2. The energy storage device according to claim 1, characterized in that: The shell is detachably connected to the first water-blocking box. The energy storage device further comprises a sealing member, which is arranged between the first water-blocking box and the shell, and along the connection between the first water-blocking box and the shell.

3. The energy storage device according to claim 2, characterized in that: One of the first water-isolating box and the shell is provided with a sealing assembly groove, the other is inserted into the sealing assembly groove, and the sealing member is provided in the sealing assembly groove.

4. The energy storage device according to claim 2, characterized in that: The first water-proof box is provided with a first fixing portion, and the shell is provided with a second fixing portion, and the first fixing portion is connected to the second fixing portion so as to connect the first water-proof box to the shell.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: The shell includes an outer shell and a second watertight box, the outer shell is provided with the assembly space, the second watertight box is located in the assembly space, the first watertight box is sealedly connected to the second watertight box, the second watertight box is sealedly connected to the outer shell, and the first watertight box, the outer shell and the second watertight box are arranged to form the sealed space.

6. The energy storage device according to claim 5, characterized in that: The second water-proof box and the outer shell are integrally formed.

7. The energy storage device according to claim 5, characterized in that: The outer shell comprises a bottom wall and a side wall, wherein the side wall is arranged around the periphery of the bottom wall, the assembly space is formed between the bottom wall and the side wall, and the second water-isolating box is sealed and connected to the bottom wall.

8. The energy storage device according to claim 7, characterized in that: The shell further comprises reinforcing ribs, wherein the reinforcing ribs connect the bottom wall, the side wall and the second water-isolating box.

9. The energy storage device according to claim 7, characterized in that: The support member is provided with a third fixing portion, the bottom wall is provided with a fourth fixing portion, and the third fixing portion is connected to the fourth fixing portion so as to connect the support member to the bottom wall.

10. The energy storage device according to claim 7, characterized in that: The bottom wall is provided with a positioning portion, and a plurality of the positioning portions are provided. The plurality of positioning portions are located in the sealed space, and each of the battery cells is positioned with the bottom wall through at least one of the positioning portions.

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