Energy storage device and energy storage system

Abstract

The present application relates to the technical field of energy storage devices, and discloses an energy storage device and an energy storage system. A first through hole of a first receiving cavity is provided in a housing of the energy storage device; a bracket of an electronic control assembly is fixed to the housing, a circuit board is fixed to the bracket, a busbar is electrically connected to the circuit board, and a part of the busbar is arranged corresponding to the first through hole; a terminal assembly is detachably arranged outside the first receiving cavity, a first seal of the terminal assembly is arranged between the housing and a conductive terminal, the busbar is connected to a first locking member and / or the conductive terminal, and the conductive terminal is electrically connected to the electronic control assembly. The energy storage device is detachably connected through the electronic control assembly and the terminal assembly, reducing the space between the two to make the overall structure compact, reducing the force on the terminal assembly and making it not easy to loosen, thereby improving the sealing performance inside the housing. Fixing the busbar relative to the first side wall through a fixing seat is beneficial to directly install and replace the conductive terminal from the outside of the housing, improving the assembly convenience.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of energy storage technology, and in particular, to an energy storage device and an energy storage system. Background Art

[0002] An energy storage device is a device that stores or releases electrical energy. It is widely used in photovoltaic power generation, indoor and outdoor energy storage, and transportation. Its main components include a housing, a battery pack, an electronic control mainboard, and conductive terminals. Among them, the battery pack and the electronic control mainboard are arranged in the housing, and the conductive terminals are arranged on the housing as input and output interfaces for current. At present, in existing energy storage devices, the electronic control mainboard and the conductive terminals are usually connected by thick cables. However, since thick cables are difficult to bend, a large installation space needs to be reserved between the electronic control mainboard and the conductive terminals, resulting in an overall structure that is not compact enough. Moreover, the thick cables generate greater stress when bent, which can easily cause the conductive terminals to loosen, affecting the sealing of the housing and reducing the overall reliability of the energy storage device. Summary of the invention

[0003] The embodiments of the present application provide an energy storage device and an energy storage system, which can reduce the distance between the electronic control component and the terminal component, reduce the volume of the energy storage device, and at the same time reduce the connection bending stress between the terminal component and the electronic control component, improve the sealing of the connection between the terminal component and the shell, and further provide a detachable connection between the terminal component and the electronic control component to facilitate the installation and maintenance of the terminal component.

[0004] A technical solution adopted in an embodiment of the present application is: to provide an energy storage device, including a shell, an electric control component, and a terminal assembly. The shell is provided with a first receiving chamber, the shell includes a first side wall, the first side wall is provided with a first through hole, and the first through hole connects the first receiving chamber with the outside. The electric control component is arranged in the first receiving chamber. The electric control component includes a bracket, a circuit board and a busbar, the bracket is fixed to the shell, the circuit board is fixed to the bracket, the busbar is electrically connected to the circuit board, and a part of the busbar is arranged corresponding to the first through hole. The terminal assembly is arranged outside the first receiving chamber, the terminal assembly includes a conductive terminal, a first locking member and a first sealing member, the first sealing member is arranged between the shell and the conductive terminal, a part of the first locking member is penetrated through the first through hole, and the busbar is connected to the first locking member and / or the conductive terminal, the first locking member is respectively connected to the conductive terminal and the busbar, and the conductive terminal is electrically connected to the busbar.

[0005] In some embodiments, the energy storage device includes a terminal base, which is fixedly disposed on a side of the first side wall away from the first accommodating cavity, and the terminal base has a mounting portion, the mounting portion is penetrated through the first through hole, and the mounting portion is provided with a second through hole, the conductive terminal is electrically connected to a busbar of the electronic control component from a side of the terminal base away from the first side wall, a portion of the busbar is penetrated through the second through hole, and / or a portion of the conductive terminal is penetrated through the second through hole.

[0006] In some embodiments, a first seal is disposed around the first through hole, and the first seal is disposed between the first side wall and the terminal base; along the thickness direction of the first side wall, a first contour of the conductive terminal projection is located outside a second contour of the second through hole projection, and the terminal assembly includes a second seal, the second seal is disposed around the second through hole, and the second seal is disposed between the terminal base and the conductive terminal.

[0007] In some embodiments, the conductive terminal includes a first portion and a second portion, the first portion and the second portion are bent and connected, the first locking member connects the busbar and the first portion, and the second portion extends in a direction away from the first receiving cavity.

[0008] In some embodiments, the mounting portion is recessed toward the first receiving cavity to form a second receiving cavity, a portion of the mounting portion is located in the first receiving cavity, a second through hole is provided at the bottom of the second receiving cavity, and the second sealing member abuts against the bottom of the second receiving cavity and the first portion; the terminal assembly includes an end cover, the end cover is connected to the terminal base to cover the cavity opening of the second receiving cavity, the end cover is provided with a third through hole, and the second portion passes through the third through hole.

[0009] In some embodiments, the busbar includes a main body section and a bent section connected to each other, the main body section is electrically connected to the circuit board, and the bent section is bent toward the first side wall; the electronic control component includes a fixed seat, the fixed seat is fixedly connected to the bracket, and the fixed seat fixes the bent section on the mounting portion, and the first locking member is detachably connected to the fixed seat.

[0010] In some embodiments, the first locking member includes a limiting head and a body, the body is provided with a first thread, the fixing seat is provided with a first screw hole, the first locking member passes through the first part and the bent section and is screwed to the first screw hole, and the first part and the bent section are located between the limiting head and the fixing seat.

[0011] In some embodiments, the energy storage device includes a first connector, which is connected to a side of the first portion close to the first accommodating cavity to form a whole, at least a portion of the first connector is located in the second through hole, and the first connector abuts against the busbar.

[0012] In some embodiments, the energy storage device includes a second connector, which is connected to a side of the busbar away from the first accommodating cavity to form a whole, at least a portion of the second connector is located in the second through hole, the second connector abuts against the conductive terminal, or the second connector abuts against the first connector.

[0013] Another technical solution adopted in the embodiment of the present application is: to provide an energy storage system, including an energy storage device.

[0014] The beneficial effects of the embodiments of the present application are as follows: The energy storage device is directly in contact connection with the terminal assembly through the electronic control assembly, reducing the space occupied between the electronic control assembly and the terminal assembly, thereby contributing to reducing the overall volume of the energy storage device. The housing adopts a sheet metal design, enhancing the reliability and structural strength of the product. At the same time, both the first seal and the second seal are made of silicone material, sealing the housing and the terminal base, and sealing the conductive terminal and the terminal base respectively. This design makes the sealing structure more regular, improves the sealing performance, and extends the service life of the product. In addition, the busbar uses a copper bar as the busbar to connect the circuit board and the conductive terminal. The space occupied by the busbar is smaller, and the copper bar has good electrical conductivity and heat dissipation performance, which helps to improve the current transmission efficiency and enhance the safety and reliability of the energy storage device; the busbar is fixed relative to the first side wall of the housing through the fixing seat, simplifying the installation and replacement process of the conductive terminal and improving the assembly convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the following will briefly introduce the drawings required for use in the description of the specific embodiments. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 is an exploded view of the energy storage device according to the embodiment of the present application.

[0017] Figure 2 is an exploded view of the energy storage device according to the embodiment of the present application from another perspective.

[0018] Figure 3 is a partial schematic view of the explosion of the energy storage device according to the embodiment of the present application.

[0019] Figure 4 is a partial cross-sectional view of the terminal base of the energy storage device according to the embodiment of the present application.

[0020] Figure 5 is a partial cross-sectional view of the energy storage device according to the embodiment of the present application.

[0021] Figure 6 is an exploded view of the conductive terminal and the first connecting member of the energy storage device according to the embodiment of the present application.

[0022] Figure 7 is the energy storage device according to the embodiment of the present application with the first connecting member and in Figure 5 is an enlarged view of the partial area A.

[0023] Figure 8 is the energy storage device according to the embodiment of the present application with the first connecting member and the second connecting member and in Figure 5 is an enlarged view of the partial area A.

[0024] Figure 9 It is a schematic diagram of an energy storage system according to another embodiment of the present application.

[0025] The reference numerals in the accompanying drawings in the specific embodiments are as follows:

[0026] 100, energy storage device; 10, housing; 11, first receiving cavity; 12, bottom case; 121, first side wall; 122, first through hole; 20, electronic control component; 21, bracket; 22, circuit board; 23, bus bar; 231, main body section; 232, bending section; 24, fixing seat; 241, first screw hole; 30, terminal component; 31, conductive terminal; 311, first part; 312, second part; 32, first locking member; 321, limiting head; 322, body; 33, first sealing member; 34, terminal base; 341, mounting portion; 342, second through hole; 343, second receiving cavity; 35, second sealing member; 36, end cover; 361, third through hole; 40, first connecting member; 50, second connecting member. Specific embodiments

[0027] To facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0029] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] Please refer to Figure 1, this application provides an embodiment of an energy storage device 100. The energy storage device 100 includes a housing 10, an electronic control component 20, a terminal component 30, and a battery component (not shown in the figure). The electronic control component 20 and the battery component are fixedly arranged inside the housing 10, the terminal component 30 is arranged on the outer shell of the housing 10, and the electronic control component 20 is electrically connected to the battery component and the terminal component 30 respectively, so that the battery component and the terminal component are electrically connected. In the energy storage device 100 of this application, the electronic control component 20 and the terminal component 30 are directly connected, eliminating the need for a thick cable to connect the electronic control component 20 and the terminal component 30 in the prior art, reducing the space required for the original thick cable to bend, thereby reducing the space between the electronic control component 20 and the terminal component 30. A battery component with a larger capacity can be installed, or the volume of the housing 10 can be reduced, effectively utilizing the space inside the housing 10. Moreover, the direct connection between the electronic control component 20 and the terminal component 30 can reduce the bending stress of the electronic control component 20 on the terminal component 30, thereby reducing the bending force on the terminal component 30. The terminal component 30 is not easily loosened relative to the housing 10, further improving the sealing performance inside the energy storage device 100. In addition, the electronic control component 20 is fixedly arranged inside the housing 10, and the terminal component 30 can be detachably connected to the electronic control component 20 from the outside of the housing 10, facilitating the assembly and maintenance of the terminal component 30, improving the assembly efficiency and reducing the maintenance difficulty.

[0031] In some embodiments, please refer to Figure 1 and Figure 5 , the housing 10 of the energy storage device 100 is provided with a first receiving cavity 11. The housing 10 includes a first side wall 121, and the first side wall 121 is provided with a first through hole 122. The first through hole 122 communicates the first receiving cavity 11 with the outside. The electronic control component 20 is arranged in the first receiving cavity 11. The terminal component 30 is arranged outside the first receiving cavity 11. The terminal component 30 includes a conductive terminal 31, a first locking member 32, and a first sealing member 33. The first sealing member 33 is arranged between the housing 10 and the conductive terminal 31. The first sealing member 33 seals the gap between the conductive terminal 31 and the housing 10, increasing the sealing performance inside the housing 10. A part of the first locking member 32 passes through the first through hole 122. The first locking member 32 is respectively connected to the conductive terminal 31 and the electronic control component 20, so that the conductive terminal 31 is electrically connected to the electronic control component 20 and the two are fixed.

[0032] For the above-mentioned housing 10, please refer to Figure 1, in some embodiments, the housing 10 is generally in the shape of a cuboid. The housing 10 includes a bottom case 12 and a top cover (not shown in the figure). The bottom case 12 is in the shape of a container with an opening. The top cover is detachably connected to the bottom case 12 to cover the opening of the bottom case 12, jointly forming a sealed first receiving cavity 11. The bottom case 12 has a first side wall 121, and a first through hole 122 is formed in the first side wall 121. The first through hole 122 communicates the first receiving cavity 11 with the outside. Of course, the gap between the bottom case 12 and the top cover can be sealed by structures such as sealant. In some embodiments, the housing 10 adopts a sheet metal housing design to enhance the structural strength of the housing 10, thereby enhancing the reliability of the energy storage device 100.

[0033] For the above-mentioned electronic control component 20, please refer to Figure 1 and Figure 5 , in some embodiments, the electronic control component 20 includes a bracket 21, a circuit board 22 and a bus bar 23. The bracket 21 is fixed inside the housing 10, and the circuit board 22 is fixed to the bracket 21 so that the circuit board 22 is fixed inside the first receiving cavity 11. A part of the bus bar 23 is electrically connected to the circuit board 22, and a part of the bus bar 23 is arranged corresponding to the first through hole 122 to facilitate connection with the first locking member 32, and / or a part of the bus bar 23 is connected to the conductive terminal 31, so that the circuit board 22 is electrically connected to the conductive terminal 31. As an example, the bracket 21 is fixed on the side of the first side wall 121 facing the first receiving cavity 11, so that the bracket 21 is closer to the first side wall 121, thereby reducing the distance between the circuit board 22 and the conductive terminal 31.

[0034] In some embodiments, please refer to Figure 3 , the bus bar 23 includes a main body section 231 and a bent section 232 connected to each other. The main body section 231 is electrically connected to the circuit board 22, and the bent section 232 is bent towards the first side wall 121. The bent section 232 is used to connect with the first locking member 32, and / or the bent section 232 is used to be electrically connected to the conductive terminal 31. Since electronic components such as resistors and capacitors are arranged on the circuit board 22, there is a certain distance between the circuit board 22 and the first side wall 121 in the thickness direction of the first side wall 121. By arranging a part of the bus bar 23 into a structure bent towards the first side wall 121, the distance between the bus bar 23 and the first side wall 121 can be reduced, so as to facilitate connection and fixation with the conductive terminal 31 and the first locking member 32.

[0035] In some embodiments, the busbar 23 is a copper bar. The circuit board 22 and the conductive terminal 31 are connected through the copper bar. On the one hand, the copper bar is easy to process to form the main body section 231 and the bending section 232, reducing the processing difficulty. On the other hand, the copper bar has good electrical conductivity and heat dissipation performance, effectively improving the efficiency of current transmission, and enhancing the connection safety and reliability between the circuit board 22 and the conductive terminal 31. In addition, compared with the structure of the thick cable in the prior art, the structure of the copper bar is lighter, saving the bending space of the wire harness and being beneficial to reducing the overall size of the energy storage device 100.

[0036] In some embodiments, please refer to Figure 3 and Figure 5 , the electronic control assembly 20 includes a fixing base 24. The fixing base 24 is fixedly connected to the bracket 21, and the fixing base 24 abuts against the side of the bending section 232 facing away from the first side wall 121. The fixing base 24 abuts and fixes against the mounting portion 341 of the terminal base 34. In this way, the fixing base 24 has a supporting effect on the bending section 232, and the fixing base 24 fixes the bending section 232 to the mounting portion 341 so that the bending section 232 can be fixed relative to the bracket 21. The conductive terminal 31 and the bending section 232 are located between the first locking member 32 and the fixing base 24. The first locking member 32 is detachably connected to the fixing base 24 to fixedly connect the conductive terminal 31 and the bending section 232 relative to the first side wall 121.

[0037] In some embodiments, the detachable connection between the first locking member 32 and the fixing base 24 means that the first locking member 32 and the fixing base 24 can be repeatedly connected and separated without damaging the structure. As an example, the first locking member 32 is a bolt. The first locking member 32 includes a limiting head 321 and a body 322. The limiting head 321 is located at one end of the body 322. The body 322 is provided with a first thread, and the fixing base 24 is provided with a first screw hole 241. The first locking member 32 passes through the first part 311 of the conductive terminal 31 and the bending section 232 of the busbar 23 and then is screwed into the first screw hole 241 to clamp and fix the first part 311 and the bending section 232 between the limiting head 321 and the fixing base 24. In other embodiments, the fixing base 24 is provided with a first buckle, and the first locking member 32 is provided with a second buckle, and the first buckle and the second buckle are snap-connected.

[0038] In the structure of the prior art energy storage device 100 where the electronic control assembly 20 and the conductive terminal 31 are connected through a thick cable, it is necessary to first install the positive cable and the negative cable on the electronic control assembly 20, and then install the electronic control assembly 20 and the battery assembly inside the housing 10. In this process, due to the certain length and flexibility of the positive cable and the negative cable, the ends of the positive cable and the negative cable are likely to directly contact and cause short circuit hazards during the installation process.

[0039] Please refer to Figure 2The energy storage device 100 of the embodiment of the present application fixes the curved section 232 of the busbar 23 on the bracket 21 by setting a fixing seat 24, thereby fixing the curved section 232 of the busbar 23 on the first side wall 121. In this way, during the assembly of the energy storage device 100, the busbar 23 is fixed and not easily deformed, and it is almost impossible for the positive busbar 23 and the negative busbar 23 to directly contact each other, which effectively improves the safety of assembly. After the battery assembly and the electronic control assembly 20 are installed in the first receiving cavity 11 of the shell 10, under the fixing action of the fixing seat 24, the curved section 232 of the busbar 23 remains fixed to the first side wall 121, which is conducive to the subsequent installation of the terminal assembly 30 on the outside of the shell 10, so that the conductive terminal 31 can be directly connected and fixed to the curved section 232 without the need for external force to clamp the curved section 232 of the busbar 23, effectively improving the convenience of installation. In addition, during the use of the energy storage device 100, the conductive terminal 31 may be worn, and the first locking member 32 and the fixing seat 24 are connected in a detachable manner, so that the conductive terminal 31 can be directly removed from the outside of the shell 10 and a new conductive terminal 31 can be installed. There is no need to disassemble the shell 10 to expose the first receiving cavity 11, thereby improving the convenience of maintenance.

[0040] See also Figure 3 and Figure 4 In some embodiments, the energy storage device 100 further includes a terminal base 34, which is disposed on the side of the first side wall 121 away from the first receiving cavity 11. The terminal base 34 has a mounting portion 341, which is penetrated through the first through hole 122, and the mounting portion 341 is provided with a second through hole 342, which is used for the first locking member 32 and a part of the conductive terminal 31 to pass through. The contour of the first through hole 122 on the first side wall 121 is larger than the contour of the second through hole 342 on the mounting portion 341, so that the first side wall 121 can also pass through other structures, such as a temperature measuring component, a monitoring component, a communication component, etc., and the second through hole 342 with a smaller aperture is provided, which is conducive to improving the sealing between the terminal assembly 30 and the housing 10.

[0041] See also Figure 5, the conductive terminal 31 is electrically connected to the bus bar 23 in the electronic control component 20 from the side of the terminal base 34 facing away from the first side wall 121. A part of the bus bar 23 of the electronic control component 20 penetrates into the second through hole 342, and / or a part of the conductive terminal 31 penetrates into the second through hole 342. Along the thickness direction of the first side wall 121, the second through hole 342 has a certain depth. Therefore, by arranging a part of the bus bar 23 to penetrate into the second through hole 342, or arranging a part of the conductive terminal 31 to penetrate into the second through hole 342, or a part of the bus bar 23 and a part of the conductive terminal 31 penetrate into the second through hole 342 at the same time, it is beneficial to fill the depth of the second through hole 342, so that the conductive terminal 31 and the bus bar 23 can be in direct contact and electrical connection, increasing the contact area and improving the current transmission efficiency.

[0042] In some embodiments, adding the structure of the terminal base 34 outside the housing 10 can make the material of the housing 10 different from that of the terminal base 34. For example, the housing 10 is made of a metal material to increase the structural strength, and the terminal base 34 is made of a plastic material to increase the insulation effect between the conductive terminal 31 and the housing 10 and reduce the production cost, etc. Of course, in other embodiments, the housing 10 and the terminal base 34 can be made of the same material.

[0043] In some embodiments, please refer to Figure 3 , the first seal 33 is arranged around the first through hole 122, and the first seal 33 is arranged between the first side wall 121 and the terminal base 34 to seal the gap between the terminal base 34 and the first side wall 121. Along the thickness direction of the first side wall 121, the first contour of the projection of the conductive terminal 31 is located outside the second contour of the projection of the second through hole 342, that is, the size of the conductive terminal 31 is larger than the size of the second through hole 342. In the thickness direction of the first side wall 121, a part of the mounting portion 341 has a blocking and limiting effect on the conductive terminal 31. At the same time, after the conductive terminal 31 is connected to the bus bar 23, the conductive terminal 31 also has a clamping and fixing effect on the mounting portion 341. The terminal assembly 30 includes a second seal 35. The second seal 35 is arranged around the second through hole 342, and the second seal 35 is arranged between the mounting portion 341 and the conductive terminal 31. The second seal 35 is used to seal the gap between the mounting portion 341 and the conductive terminal 31.

[0044] In some embodiments, please refer to Figure 3, the conductive terminal 31 includes a first portion 311 and a second portion 312. The first portion 311 and the second portion 312 are bent and connected. The first locking member 32 connects the bus bar 23 of the electronic control assembly 20 and the first portion 311, and the second portion 312 extends in a direction away from the first receiving cavity 11. As an example, the conductive terminal 31 is generally in an L-shaped structure. The plane where the first portion 311 is located is substantially parallel to the plane where the first side wall 121 is located, and the plane where the second portion 312 is located is substantially perpendicular to the plane where the first side wall 121 is located. With the above structure, the first portion 311 has sufficient space for the first locking member 32 to pass through. After the first locking member 32 is fixedly connected to the fixed seat 24, the first portion 311, the terminal base 34, and the bending portion are clamped between the first locking portion and the fixed seat 24. And the second portion 312 extends in a direction away from the receiving cavity, which is beneficial for the user to hold or clamp the second portion 312 during the assembly process to install the conductive terminal 31 on the terminal base 34, improving the installation convenience. In some embodiments, the first portion 311 and the second portion 312 of the conductive terminal 31 are integrally formed structures, which can be obtained by directly manufacturing an L-shaped structure or by locally bending a flat plate-shaped conductive terminal 31. In some embodiments, a round hole design may be provided at the end of the second portion 312 of the conductive terminal 31 to facilitate the connection of the wire with the outside.

[0045] In some embodiments, referring to Figure 4 and Figure 5 , the installation portion 341 is recessed toward the first receiving cavity 11 to form a second receiving cavity 343, and a part of the installation portion 341 is located in the first receiving cavity 11. The second through hole 342 as described above is provided at the bottom of the second receiving cavity 343. The second sealing member 35 abuts between the bottom of the second receiving cavity 343 and the first portion 311 of the conductive terminal 31 to seal the gap between the first portion 311 and the bottom of the second receiving cavity 343, improving the sealing performance. In some embodiments, both the first sealing member 33 and the second sealing member 35 can be silicone rubber sealing rings. Compared with the prior art in which the gap between the terminal and the housing 10 is sealed by applying glue later, the energy storage device 100 in the embodiment of the present application uses silicone rubber sealing rings for sealing, which is more regular and beautiful, the sealing cost is reduced, and at the same time, the sealing effect of the rubber sealing ring is better, improving the sealing performance, and the service life of the silicone rubber sealing ring is longer, improving the reliability of the energy storage device 100.

[0046] The terminal assembly 30 includes an end cap 36. The end cap 36 is connected to the terminal base 34 to cover the opening of the second receiving cavity 343. The end cap 36 is provided with a third through hole 361, and the second portion 312 of the conductive terminal 31 passes through the third through hole 361. The end cap 36 plays a role in supporting and fixing the second portion 312, reducing the shaking amplitude of the second portion 312 during use. In addition, the first locking member 32 is located in the second receiving cavity 343, and the end cap 36 can cover the first locking member 32 to prevent the first locking member 32 from being exposed, improving the aesthetics of the energy storage device 100. Moreover, the end cap 36 covers the opening of the second receiving cavity 343, which also helps to reduce the entry of external debris and moisture into the second receiving cavity 343, facilitating the improvement of the sealing performance.

[0047] In some embodiments, please refer to Figure 6 and Figure 7 , the energy storage device 100 includes a first connecting member 40. The first connecting member 40 is integrally connected to the side of the first portion 311 of the conductive terminal 31 close to the first receiving cavity 11. At least a part of the first connecting member 40 is located in the second through hole 342, and the first connecting member 40 abuts against the bus bar 23. By using the first connecting member 40 to fill the depth of the second through hole 342, the conductive terminal 31 and the bus bar 23 can be directly abutted and connected. Increasing the first connecting member 40 is beneficial to reducing the manufacturing difficulty of the conductive terminal 31 and the bus bar 23. Specifically, the first portion 311 of the conductive terminal 31 can be made into a flat plate shape, and the bus bar 23 can be formed by directly bending a flat plate into a straight section and a bent section 232. In this way, neither the first portion 311 nor the bent section 232 needs to manufacture a convex portion to fill the depth between the first through hole 122 and the second through hole 342. It can be understood that the first connecting member 40 has conductivity, and the first connecting member 40 and the conductive terminal 31 are two independent parts connected into a whole by any means such as bonding, riveting, and clamping. Compared with the solution of directly machining a convex portion on the first portion 311, the method of splicing the first connecting member 40 and the conductive terminal 31 in this embodiment is simpler, reducing the manufacturing and processing difficulty.

[0048] In some embodiments, please refer to Figure 8, the energy storage device 100 includes a second connecting member 50. The second connecting member 50 is integrally connected to the side of the bus bar 23 facing away from the first receiving cavity 11. At least a part of the second connecting member 50 is located in the second through hole 342. The second connecting member 50 abuts against the conductive terminal 31, or the second connecting member 50 abuts against the first connecting member 40. The function of the second connecting member 50 is the same as that of the first connecting member 40. For details, please refer to the above embodiments. Similarly, compared with the solution of directly machining a convex portion on the bending section 232 of the bus bar 23, the method of splicing the second connecting member 50 with the bending section 232 in this embodiment is simpler, reducing the manufacturing and processing difficulty. It can be understood that in some embodiments, only the first connecting member 40 needs to be spliced with the first part 311, or only the second connecting member 50 needs to be spliced with the bending section 232, or the first connecting member 40 is spliced with the first part 311 and the second connecting member 50 is spliced with the bending section 232. The first connecting member 40 abuts against the second connecting member 50, and together they fill the depth of the second through hole 342.

[0049] In some embodiments, please refer to Figure 1 , the number of the terminal assemblies 30 is two. The two terminal assemblies 30 have the same structure and are both electrically connected to the electronic control assembly 20. One of the terminal assemblies 30 constitutes the positive electrode of the energy storage device 100, and the other terminal assembly 30 constitutes the negative electrode of the energy storage device 100.

[0050] Please refer to Figure 9 , the present application further provides an embodiment of an energy storage system. The energy storage system includes a controller main board, a buck-boost converter, an inverter, and the above-mentioned energy storage device. The controller main board is connected to the energy storage device through the buck-boost converter. The energy storage device is connected to the inverter. The energy storage device is used to be connected to an external AC load through the inverter, or the energy storage device is used to be directly connected to an external DC load.

[0051] In some embodiments, the energy storage system further includes a first relay K1 and a second relay K2. The first relay K1 is connected to the buck-boost converter and the energy storage device, and the first relay K1 is electrically connected to the controller main board. The second relay K2 is connected to the energy storage device and the inverter, and the second relay K2 is electrically connected to the controller main board. When the buck-boost converter receives the control signal from the controller main board, it charges the energy storage device with a matched voltage through the first relay K1. When it is fully charged, the first relay K1 disconnects. The energy storage device is sent to the inverter through the second relay K2 to supply power to the AC load, and / or the energy storage device directly supplies power to the DC load through the second relay K2. When the energy storage device is under-voltage, the second relay K2 disconnects.

[0052] In some embodiments, the energy storage system further includes a display board. The display board is electrically connected to the controller main board, and the display board is used to display the control parameters of the controller main board.

[0053] For the specific structure and function of the energy storage device 100, reference may be made to any of the above embodiments, which will not be elaborated herein.

[0054] In the energy storage device 100 according to the embodiment of the present application, the electronic control component 20 is directly in contact connection with the terminal component 30, reducing the space occupied between the electronic control component 20 and the terminal component 30, thereby contributing to reducing the overall volume of the energy storage device 100. The housing 10 adopts a sheet metal design, improving the reliability and structural strength of the product. At the same time, both the first seal 33 and the second seal 35 are made of silicone material, sealing the housing 10 and the terminal base 34, and sealing the conductive terminal 31 and the terminal base 34 respectively. This design makes the sealing structure more regular, improves the sealing performance, and extends the service life of the product. In addition, the busbar 23 uses a copper bar as the busbar to connect the circuit board 22 and the conductive terminal 31. The space occupied by the busbar 23 is smaller, and the copper bar has good electrical conductivity and heat dissipation performance, which helps to improve the current transmission efficiency and enhance the safety and reliability of the energy storage device 100; the busbar 23 is fixed relative to the first side wall 121 of the housing 10 through the fixing seat 24, simplifying the installation and replacement process of the conductive terminal 31 and improving the assembly convenience.

[0055] In the energy storage device 100 according to the embodiment of the present application, the electronic control component 20 is directly in contact connection with the terminal component 30, reducing the space between the electronic control component 20 and the terminal component 30, which is beneficial to reducing the overall volume of the energy storage device 100; the housing 10 adopts a sheet metal design, which helps to improve the reliability and structural strength of the product; the first seal 33 made of silicone seals the housing 10 and the terminal base 34, and the second seal 35 made of silicone seals the conductive terminal 31 and the terminal base 34, which is more regular, has better sealing performance, and longer service life; the copper bar is used as the busbar 23 to connect the circuit board 22 and the conductive terminal 31. The space occupied by the busbar 23 is smaller, and the copper bar has good electrical conductivity and heat dissipation performance, which helps to improve the current transmission efficiency and enhance the safety and reliability of the energy storage device 100; the busbar 23 is fixed relative to the first side wall 121 through the fixing seat 24, which is beneficial to directly installing and replacing the conductive terminal 31 from the outside of the housing 10 and improving the assembly convenience.

[0056] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An energy storage device, characterized in that: include: A shell body, provided with a first receiving cavity, the shell body comprising a first side wall, the first side wall being provided with a first through hole, the first through hole being in communication with the first receiving cavity and the outside; A terminal base, the terminal base is fixed to a side of the first side wall away from the first receiving cavity, and the terminal base has a mounting portion; An electric control component is arranged in the first receiving cavity; the electric control component comprises a bracket, a circuit board, a busbar and a fixing seat, the bracket is fixed to the housing, the circuit board is fixed to the bracket, the busbar comprises a main body section and a bent section connected to each other, the main body section is electrically connected to the circuit board, at least a part of the bent section is arranged corresponding to the first through hole, the bent section is bent toward the first side wall, the fixing seat is fixedly connected to the bracket, and the fixing seat fixes the bent section to the mounting portion; A terminal assembly is detachably arranged outside the first receiving cavity, and the terminal assembly includes a conductive terminal, a first locking member and a first sealing member, the first sealing member is arranged between the shell and the conductive terminal, a part of the first locking member is penetrated through the first through hole, and the busbar is connected to the first locking member and / or the conductive terminal, the conductive terminal is electrically connected to the busbar, and the first locking member is detachably connected to the fixing seat.

2. The energy storage device according to claim 1, characterized in that: The mounting portion is penetrated through the first through hole, and the mounting portion is provided with a second through hole, the conductive terminal is electrically connected to the busbar from the side of the terminal base away from the first side wall, a part of the busbar is penetrated through the second through hole, and / or a part of the conductive terminal is penetrated through the second through hole.

3. The energy storage device according to claim 2, characterized in that: The first sealing member is disposed around the first through hole, and the first sealing member is disposed between the first side wall and the terminal base; Along the thickness direction of the first side wall, the first contour of the conductive terminal projection is located outside the second contour of the second through hole projection, and the terminal assembly includes a second seal, which is arranged around the second through hole and between the terminal base and the conductive terminal.

4. The energy storage device according to claim 3, characterized in that: The conductive terminal includes a first portion and a second portion, the first portion and the second portion are bent and connected, the first locking member connects the busbar and the first portion, and the second portion extends in a direction away from the first receiving cavity.

5. The energy storage device according to claim 4, characterized in that: The mounting portion is recessed toward the first receiving cavity to form a second receiving cavity, a portion of the mounting portion is located in the first receiving cavity, a cavity bottom of the second receiving cavity is provided with the second through hole, and the second sealing member abuts against the cavity bottom of the second receiving cavity and the first portion; The terminal assembly includes an end cover, which is connected to the terminal base to cover the cavity opening of the second accommodating cavity. The end cover is provided with a third through hole, and the second part passes through the third through hole.

6. The energy storage device according to claim 4, characterized in that: The conductive terminal is in an L-shaped structure, the plane where the first part is located is parallel to the plane where the first side wall is located, and the plane where the second part is located is perpendicular to the plane where the first side wall is located; And / or, the second portion of the conductive terminal is provided with a circular hole, and the circular hole is used for connecting with an external locking wire.

7. The energy storage device according to claim 4, characterized in that: The first locking member includes a limiting head and a body, the body is provided with a first thread, the fixing seat is provided with a first screw hole, the first locking member passes through the first part and the bending section and is screwed to the first screw hole, and the first part and the bending section are located between the limiting head and the fixing seat.

8. The energy storage device according to claim 4, characterized in that: The energy storage device includes a first connecting member, the first connecting member is connected to the first portion to form a whole, at least a part of the first connecting member is located in the second through hole, and the first connecting member abuts against the busbar.

9. The energy storage device according to claim 8, characterized in that: The energy storage device includes a second connector, which is connected to the busbar to form a whole, at least part of the second connector is located in the second through hole, the second connector abuts against the conductive terminal, and / or the second connector abuts against the first connector.

10. An energy storage system, characterized in that: It comprises a controller mainboard, a buck-boost converter, an inverter and an energy storage device as claimed in any one of claims 1 to 9; The controller mainboard is connected to the energy storage device through the buck-boost device, the energy storage device is connected to the inverter, and the energy storage device is used to connect to an external AC load through the inverter, or the energy storage device is used to directly connect to an external DC load.

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