Energy storage device

Abstract

The utility model relates to the technical field of energy storage, and discloses energy storage equipment which comprises a plurality of battery modules and a base. The plurality of battery modules are stacked in a first direction, each battery module comprises a first shell, a first connector and a second connector, and the adjacent battery modules are connected through the first connectors and the second connectors. The base is arranged at the bottom of the battery module, the base comprises a second shell and a third connector, the third connector is arranged on the second shell, and the third connector is electrically connected with the first connector of the adjacent battery module. The third connector comprises an insulating base part and a conductive terminal arranged on the insulating base part. The conductive terminal comprises a positive terminal, a negative terminal and a middle terminal, wherein the positive terminal and the negative terminal are integrally formed, and the middle terminal is connected with the positive terminal and the negative terminal.

Description

TECHNICAL FIELD

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

[0002] The energy storage device generally comprises a base, a plurality of battery modules and an electrical module. The plurality of battery modules are configured to store and release electric energy, and the electrical module is configured to control and monitor the plurality of battery modules.

[0003] The plurality of battery modules are connected in series, and the plurality of battery modules are stacked above the base. The current loop needs to be formed through the base. In the related art, the base is connected to the positive and negative terminals of the battery module through a wire harness. The waterproof performance requirement is strict, and the precision of the production equipment and the process of assembly have high requirements, which is not conducive to production and assembly. UTILITY MODEL CONTENT

[0004] The technical problem solved by the embodiment of the present application is to provide an energy storage device. By changing the structure of the connector on the base, the waterproof performance can be improved, the technical requirements of production and assembly can be reduced, and the production and assembly efficiency can be improved.

[0005] To solve the above technical problem, one technical scheme adopted by the embodiment of the present application is to provide an energy storage device comprising a plurality of battery modules and a base. The plurality of battery modules are stacked along a first direction. Each battery module comprises a first shell, a first connector and a second connector. The first connector and the second connector are arranged on both sides of the first shell along the first direction. Adjacent battery modules are connected through the first connector and the second connector, and the first connector and the second connector transmit power. The base is arranged at the bottom of the battery module, and the base comprises a second shell and a third connector. The third connector is arranged on the second shell, and the third connector is connected with the first connector of the adjacent battery module. The third connector comprises an insulating base and a conductive terminal arranged on the insulating base. The conductive terminal comprises a positive terminal, a negative terminal and an intermediate terminal connecting the positive terminal and the negative terminal.

[0006] In one or more embodiments, the insulating base and the conductive terminal are integrally injection molded, and the intermediate terminal is located inside the insulating base.

[0007] In one or more embodiments, the third connector comprises a cover plate, the cover plate is connected with the insulating base, and the cover plate covers the intermediate terminal.

[0008] In one or more embodiments, the first housing of each battery module is a metal housing, the first connector includes a first ground terminal, the second connector includes a second ground terminal, the first ground terminal and the second ground terminal are electrically connected to the first housing. The second housing is a metal housing, the third connector includes a third ground terminal, the third ground terminal is electrically connected to the second housing, the third ground terminal is connected to the first ground terminal, the base and the plurality of battery modules are grounded, and an equipotential connection is achieved.

[0009] In one or more embodiments, the third connector includes a fourth ground terminal, the fourth ground terminal is connected to the third ground terminal, and the fourth ground terminal is fixed to and electrically connected to the second housing.

[0010] In one or more embodiments, the battery module includes a metal adapter fixed to and electrically connected to the first housing, and the first connector and the second connector are electrically connected to the metal adapter.

[0011] In one or more embodiments, the first connector includes a first wire harness, one end of the first wire harness is connected to the first ground terminal, and the other end of the first wire harness is connected to the metal adapter. The second connector includes a second wire harness, one end of the second wire harness is connected to the second ground terminal, and the other end of the second wire harness is connected to the metal adapter.

[0012] In one or more embodiments, the energy storage device includes a plurality of first fixing members, the first fixing members are connected to at least two battery modules and electrically connected to the first housing, and the first fixing members equipotentially connect the at least two first housings. At least one first fixing member is connected to the base and the battery module, respectively, so that the at least one first fixing member equipotentially connects the second housing and the first housing.

[0013] In one or more embodiments, the energy storage device includes an electrical module disposed on top of the battery module, the electrical module includes a third housing, a fourth connector, and a fifth connector, the fourth connector is electrically connected to the second connector of an adjacent battery module. The fourth connector includes a fifth ground terminal, the fifth connector includes a sixth ground terminal, the fifth ground terminal and the sixth ground terminal are connected to the third housing, and the fifth connector is configured to be connected to an external device.

[0014] In one or more embodiments, the base includes a protective cover connected to a side of the second housing away from the battery module in a first direction, and the protective cover covers the third connector.

[0015] The beneficial effects of the present application are: the energy storage device of the present application connects the positive terminal and the negative terminal through the intermediate terminal, which can form a series loop when the plurality of battery modules are plugged with the third connector. The integrally formed conductive terminal can directly connect the positive terminal and the negative terminal, simplify the connection structure, and help to enhance the waterproof performance of the third connector. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the drawings needed in the specific embodiment description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 is a schematic diagram of an energy storage device according to an embodiment of the present application.

[0018] Figure 2 is a schematic diagram of a base of an energy storage device according to an embodiment of the present application.

[0019] Figure 3 is Figure 2 is an enlarged schematic diagram of a part A in

[0020] Figure 4 is a schematic diagram of a third connector in an energy storage device according to another embodiment of the present application.

[0021] Figure 5 is a schematic diagram of another view of a base of an energy storage device according to an embodiment of the present application.

[0022] Figure 6 is a schematic diagram of an energy storage device according to an embodiment of the present application, in which a part of the first shell of the battery module is omitted.

[0023] Figure 7 is a schematic diagram of another view of an energy storage device according to an embodiment of the present application.

[0024] Figure 8 is a schematic diagram of an energy storage device according to an embodiment of the present application, in which a part of the third shell of the battery module is omitted. DETAILED DESCRIPTION

[0025] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used in the present specification indicate the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and the like are merely configured for the purpose of description and cannot be understood as indicating or implying relative importance.

[0026] Unless otherwise defined, all technical and scientific terms used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are merely for the purpose of describing specific embodiments and are not configured to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more of the related listed items.

[0027] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0028] Please refer to Figure 1 and Figure 2 The energy storage device 100 according to the embodiments of the present application includes a plurality of battery modules 10 and a base 20. The plurality of battery modules 10 are arranged in a stack along a first direction Z. Each battery module 10 includes a first housing 11, a first connector 12, and a second connector 13. The first connector 12 and the second connector 13 are arranged at two sides of the first housing 11 along the first direction Z. Two adjacent battery modules 10 are connected by the first connector 12 and the second connector 13. The first connector 12 and the second connector 13 transmit power. Specifically, the first connector 12 of one battery module 10 is connected to the second connector 13 of another battery module 10 by plug-in connection. In other embodiments, the first connector 12 and the second connector 13 simultaneously transmit power and signals.

[0029] The base 20 is arranged at the bottom of the battery module 10. The base 20 is used to support the plurality of battery modules 10. The base 20 includes a second housing 21 and a third connector 22. The third connector 22 is arranged at the second housing 21. The third connector 22 is connected to the first connector 12 of the adjacent battery module 10.

[0030] Please refer to Figure 3 and Figure 4 The third connector 22 includes an insulating base 221 and a conductive terminal 222 arranged on the insulating base 221. The conductive terminal 222 includes a positive terminal 2221, a negative terminal 2222 and an intermediate terminal 2223 connecting the positive terminal 2221 and the negative terminal 2222, which are integrally formed. The positive terminal 2221 and the negative terminal 2222 are connected with the first connector 12 of the battery module 10, and the intermediate terminal 2223 electrically connects the positive terminal 2221 and the negative terminal 2222 to form a current loop between the plurality of battery modules 10 and the base 20.

[0031] The energy storage device 100 according to the embodiments of the present application can form a series loop when the plurality of battery modules 10 are connected with the third connector 22 by using the intermediate terminal 2223 to connect the positive terminal 2221 and the negative terminal 2222. The integrally formed conductive terminal 222 can directly connect the positive terminal 2221 and the negative terminal 2222, reduce the additional wire harness for connecting the positive terminal 2221 and the negative terminal 2222, simplify the connection structure, and help to enhance the waterproof performance of the third connector 22.

[0032] In some embodiments, the insulating base 221 is integrally formed with the conductive terminal 222 by injection molding, and the intermediate terminal 2223 of the conductive terminal 222 is located inside the insulating base 221, which helps to enhance the waterproof performance of the third connector 22. As an embodiment, the conductive terminal 222 is a conductive metal piece, and the insulating base 221 is an insulating material such as plastic. The conductive terminal 222 is placed in a mold, and molten insulating material is poured in to form the conductive terminal 222 and the insulating material by injection molding. The insulating base 221 formed after molding directly wraps the intermediate terminal 2223 of the conductive terminal 222.

[0033] In some embodiments, the third connector 22 includes a cover plate 223 connected with the insulating base 221, which covers the mounting groove 2211 to cover the intermediate terminal 2223, reduces the probability of water contacting the intermediate terminal 2223, and improves the waterproof performance of the third connector 22.

[0034] In some embodiments, please refer to Figure 4The insulating base 221 is first injection molded, and a mounting groove 2211 for mounting the conductive terminal 222 is reserved. The conductive terminal 222 is assembled with the mounting groove 2211 of the insulating base 221 to form an integral whole, and the middle terminal 2223 of the conductive terminal 222 is exposed to the mounting groove 2211. By reserving the mounting groove 2211 on the insulating base 221, the conductive terminal 222 can be easily assembled with the insulating base 221, thus providing another assembly method of the insulating base 221 and the conductive terminal 222 in addition to integral injection molding. The above assembly method can be performed at room temperature to reduce the influence of high temperature on the conductivity of the conductive terminal 222.

[0035] In some embodiments, referring to Figure 6 and Figure 7 The first shell 11 of each battery module 10 is a metal shell, the first connector 12 includes a first ground terminal 121, the second connector 13 includes a second ground terminal 131, and the first ground terminal 121 and the second ground terminal 131 are electrically connected to the first shell 11. The first shell 11 is grounded to an external device through the first ground terminal 121 and the second ground terminal 131.

[0036] In some embodiments, the first shell 11 is covered with an insulating layer to enhance the insulation and shielding functions of the first shell 11.

[0037] In some embodiments, the second shell 21 is a metal shell, the third connector 22 includes a third ground terminal 224, the third ground terminal 224 is electrically connected to the second shell 21, and when the first connector 12 and the third connector 22 are plugged together, the first ground terminal 121 is connected to the third ground terminal 224, so that the second shell 21 of the base 20 and the first shells 11 of the plurality of battery modules 10 are grounded and connected to the same potential, thereby improving the safety performance of the base 20 and the plurality of battery modules 10.

[0038] In some embodiments, the second shell 21 is covered with an insulating layer to enhance the insulation and shielding functions of the second shell 21.

[0039] In some embodiments, the third ground terminal 224 can be connected to the second shell 21 through a wire harness or a ground terminal. As an example, referring to Figure 3 and Figure 4The third connector 22 includes a fourth grounding terminal 225 connected to the third grounding terminal 224, and the fourth grounding terminal 225 is fixed to the second shell 21 and electrically connected to the second shell 21. Part of the fourth grounding terminal 225 is located inside the insulating base 20, which can enhance the waterproof performance of the third grounding terminal 224 and the fourth grounding terminal 225. In further examples, the third grounding terminal 224 and the fourth grounding terminal 225 are integrally formed metal pieces.

[0040] In some embodiments, referring to Figure 3 The second shell 21 is provided with a first through hole 211 and a second through hole 212. The third connector 22 is mounted on the second shell 21 from the side of the second shell 21 away from the battery module, and the insulating base 221 of the third connector 22 is arranged in the first through hole 211, and the fourth grounding terminal 225 of the third connector 22 is arranged in the second through hole 212, and the fourth grounding terminal 225 is in contact with the second shell 21. The fourth grounding terminal 225 is provided with threads, and the third connector 22 includes a fastener 226 that is screwed with the fourth grounding terminal 225 from the side of the second shell 21 close to the battery module 10 to fix the fourth grounding terminal 225 to the second shell 21. By connecting the fourth grounding terminal 225 to the third grounding terminal 224 and the second shell 21 respectively, the use of wire harnesses can be reduced, and part of the fourth grounding terminal 225 located inside the insulating base 221 can enhance the waterproof performance of the third connector 22.

[0041] In some embodiments, referring to Figure 6 The battery module 10 includes a metal adapter 14 fixed to and electrically connected to the first shell 11, and the first connector 12 and the second connector 13 are both electrically connected to the metal adapter 14. Through the above structure, the metal first shell 11 can be grounded.

[0042] In some embodiments, referring to Figure 6 and Figure 7 The first connector 12 includes a first wire harness 122, one end of which is connected to the first grounding terminal 121, and the other end of which is connected to the metal adapter 14. The second connector 13 includes a second wire harness 132, one end of which is connected to the second grounding terminal 131, and the other end of which is connected to the metal adapter 14. By using the first wire harness 122 to connect the first grounding terminal 121 and the metal adapter 14, and using the second wire harness 132 to connect the second grounding terminal 131, the difficulty of grounding connection of the first connector 12 and the second connector 13 to the second shell 21 can be reduced, and the layout of the first wire harness 122 and the second wire harness 132 inside the second shell 21 is facilitated, and the layout is reasonable.

[0043] In some embodiments, referring to Figure 5 , the base 20 comprises a protective cover 23 connected to the second shell 21 away from the battery module 10 in the first direction Z, the protective cover 23 covers the third connector 22, so that the part of the third connector 22 away from the battery module 10 is not directly exposed to the outside, thereby reducing the probability of external moisture and dust adhering to the third connector 22. In further embodiments, the protective cover 23 and the second shell 21 also have a sealing gasket therebetween to further enhance the sealing between the protective cover 23 and the second shell 21.

[0044] In some embodiments, referring to Figure 1 , the energy storage device 100 comprises a plurality of first fixing members 30, the first fixing member 30 is connected with at least two battery modules 10, and the first fixing member 30 is electrically connected with the first shell 11, and the first fixing member 30 connects the at least two first shells 11 in equipotential. At least one first fixing member 30d is connected with the base 20 and the battery module 10 respectively, and the first fixing member 30d connects the second shell 21 and the first shell 11 in equipotential. Through the above structure, the energy storage device 100 of the present application can realize both grounding connection and equipotential connection between the plurality of battery modules 10 and between the battery module 10 and the base 20, thereby improving the safety performance of the energy storage device 100.

[0045] In some embodiments, referring to Figure 1 , at least one first fixing member 30a is fixedly connected with two battery modules 10a and 10c spaced apart. Specifically, when the plurality of battery modules 10 are arranged in a stacked manner in the first direction Z, at least one first fixing member 30a spans three battery modules 10a, 10b and 10c, and one end of the first fixing member 30a is fixedly connected with one battery module 10a, and the other end of the first fixing member 30a is fixedly connected with another battery module 10c, and the two battery modules 10a and 10c fixedly connected with the first fixing member 30a also have a third battery module 10b therebetween. Through such a structure, the first fixing member 30a can have an abutting limiting effect on the third battery module 10b in the second direction X, so as to enhance the connection stability of the plurality of battery modules 10. The first direction Z and the second direction X are perpendicular.

[0046] Further, when at least two first fixing members 30a and 30b are connected to the two spaced battery modules 10 in the above manner, and the two first fixing members 30a and 30b are distributed staggered in the first direction Z, the two first fixing members 30a and 30b limit the plurality of battery modules 10 in the first direction Z, the second direction X and the third direction Y, further enhancing the firmness of the connection of the plurality of battery modules 10. Wherein, the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0047] In some embodiments, referring to Figure 1 , at least one first fixing member 30d is fixedly connected with the base 20 and the bottom battery module 10e. In this way, the second shell 21 of the base 20 and the first shell 11 of the adjacent battery module 10 are connected in equipotential by the first fixing member 30d, improving the safety of the base 20 and the battery module 10.

[0048] In some embodiments, referring to Figure 1 and Figure 8 , the energy storage device 100 includes an electrical module 40, the electrical module 40 is arranged at the top of the battery module 10, the electrical module 40 includes a third shell 41, a fourth connector 42 and a fifth connector 43, the fourth connector 42 is electrically connected with the second connector 13 of the adjacent battery module 10, and the fifth connector 43 is configured to be connected with an external device. When the fifth connector 43 is grounded, the electrical module 40, the plurality of battery modules 10 and the base 20 are all grounded.

[0049] In some embodiments, referring to Figure 8 , the third shell 41 of the electrical module 40 is a metal shell. The fourth connector 42 includes a fifth grounding terminal 421 and a third wire harness 422, one end of the third wire harness 422 is connected with the fifth grounding terminal 421, and the other end of the third wire harness 422 is connected with the third shell 41. The fifth connector 43 includes a sixth grounding terminal 431 and a fourth wire harness 432, one end of the fourth wire harness 432 is connected with the sixth grounding terminal 431, and the other end of the fourth wire harness 432 is connected with the third shell 41, so that the third shell 41 of the electrical module 40 can be grounded.

[0050] In some embodiments, referring to Figure 1 , at least one first fixing member 30c is fixedly connected with the electrical module 40 and the top battery module 10d. In this way, the third shell 41 of the electrical module 40 and the first shell 11 of the adjacent battery module 10 are connected in equipotential by the first fixing member 30d, improving the safety of the electrical module 40 and the battery module 10.

[0051] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a plurality of battery modules stacked along a first direction, each of the battery modules comprising a first housing, a first connector and a second connector, the first connector and the second connector being arranged on two sides of the first housing along the first direction, adjacent battery modules being connected by the first connector and the second connector, the first connector and the second connector transmitting power; a base arranged at the bottom of the battery modules, the base comprising a second housing and a third connector, the third connector being arranged on the second housing, and the third connector being connected with the first connector of adjacent battery modules; the third connector comprising an insulating base and a conductive terminal arranged on the insulating base, the conductive terminal comprising a positive terminal, a negative terminal and an intermediate terminal connecting the positive terminal and the negative terminal.

2. The energy storage device according to claim 1, wherein the insulating base and the conductive terminal are integrally injection molded, and the intermediate terminal is located inside the insulating base.

3. The energy storage device according to claim 1, wherein the third connector comprises a cover plate connected with the insulating base, and the cover plate covers the intermediate terminal.

4. The energy storage device according to any one of claims 1-3, wherein the first housing of each of the battery modules is a metal housing, the first connector comprises a first ground terminal, the second connector comprises a second ground terminal, and the first ground terminal and the second ground terminal are electrically connected to the first housing; the second housing is a metal housing, the third connector comprises a third ground terminal, the third ground terminal is electrically connected to the second housing, the third ground terminal is connected with the first ground terminal, and the base and the plurality of battery modules are connected in an equipotential manner.

5. The energy storage device according to claim 4, wherein the third connector comprises a fourth ground terminal, the fourth ground terminal is connected to the third ground terminal, and the fourth ground terminal is fixed to and electrically connected to the second housing.

6. The energy storage device according to claim 4, wherein the battery module comprises a metal adapter fixed to and electrically connected to the first housing, and the first connector and the second connector are both electrically connected to the metal adapter.

7. The energy storage device according to claim 6, wherein the first connector comprises a first wire harness, one end of the first wire harness is connected to the first ground terminal, and the other end of the first wire harness is connected to the metal adapter; the second connector comprises a second wire harness, one end of the second wire harness is connected to the second ground terminal, and the other end of the second wire harness is connected to the metal adapter.

8. The energy storage device according to claim 4, wherein The energy storage device comprises a plurality of first fixing members, the first fixing members are connected with the at least two battery modules, and the first fixing members are electrically connected with the first housings, and the first fixing members connect the at least two first housings in an equipotential manner; At least one of the first fixing members is connected with the base and the battery module respectively, and the at least one first fixing member connects the second housing and the first housing in an equipotential manner.

9. The energy storage device according to claim 4, wherein The energy storage device comprises an electrical module arranged on the top of the battery module, the electrical module comprises a third housing, a fourth connector and a fifth connector, the fourth connector is connected with the second connector of the adjacent battery module; The fourth connector comprises a fifth grounding terminal, the fifth connector comprises a sixth grounding terminal, the fifth grounding terminal and the sixth grounding terminal are both connected with the third housing, and the fifth connector is configured to be connected with an external device.

10. The energy storage device according to claim 4, wherein The base comprises a protective cover, along the first direction, the protective cover is connected with the second housing away from the side of the battery module, and the protective cover covers the third connector.

Images