A battery pack and energy storage box

Abstract

The present application relates to a battery pack and an energy storage box, which belongs to the field of energy storage technology. The battery pack includes a battery module, a connector and a first output pole seat assembly. The battery module includes an end plate, an electrical connection row and a plurality of battery cells. The plurality of battery cells are located between the end plates, and the electrical connection row is electrically connected to the battery cells. The connector is electrically connected to the electrical connection row. The first output pole seat assembly includes a first body for fixing the connector and a second body for fixing the electrical connection row. The first body includes a plate body and at least two first partitions arranged at intervals. The first partition protrudes relative to the plate body along the length direction of the battery pack, and there is at least one cavity between the plate body and the first partition. When an electrical fault occurs in the battery pack, at least one cavity enclosed between the plate body and the first partition is used to allow the current to flow through the cavity, even if the current needs to cross the first partition to flow to the charged metal parts, so as to increase the creepage distance, which is beneficial to improving the electrical safety performance of the battery pack.

Description

Technical Field

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

[0002] At present, battery packs generally include low-voltage connectors and output electrical connection bars. The low-voltage connector is mainly used to ensure communication and power transmission between the battery management system (BMS) and other electronic control units, and the output electrical connection bar is mainly used to transmit power from the battery pack to the motor controller or other high-voltage electrical equipment. The low-voltage connector and the output electrical connection bar are fixed to the end plate of the battery pack through a fixing seat, but when the fixing seat is used to fix the low-voltage connector, there is a problem of poor electrical safety performance. Summary of the invention

[0003] In view of this, the present application provides a battery pack and an energy storage box for solving the problem of poor electrical safety performance when a fixing base is used to fix an end plate to a low-voltage connector.

[0004] In a first aspect, the present application provides a battery pack, the battery pack comprising a battery module, a connector and a first output pole seat assembly, the battery module comprising an end plate, an electrical connection row and a plurality of battery cells, the plurality of battery cells being located between the end plates, the electrical connection row being electrically connected to the battery cells. The connector is electrically connected to the electrical connection row. The first output pole seat assembly comprises a first body for fixing the connector and a second body for fixing the electrical connection row.

[0005] The first body includes a plate body and at least two first partitions arranged at intervals, the first partitions protrude relative to the plate body along the length direction of the battery pack, and there is at least one cavity between the plate body and the first partitions.

[0006] When an electrical fault occurs in the battery pack, at least one cavity is enclosed between the plate body and the first partition so that the current can flow through the cavity. Even if the current needs to cross the first partition to flow to the charged metal component, the creepage distance can be increased, so that the creepage current between two charged metal components cannot reach in a straight line, so as to reduce the risk of creepage between metal components such as connectors and end plates, reduce the risk of safety hazards, and thus help to improve the electrical safety performance of the battery pack and ensure the safety of the battery pack 1 when in use.

[0007] In this embodiment, the first body further includes at least two second partitions spaced apart from each other, the second partitions connecting adjacent first partitions, and along the length direction of the battery pack, the second partitions have a first distance L to the surface of the first partition, satisfying 5mm≤L≤10mm.

[0008] The first partition is perpendicular to a height direction of the battery pack.

[0009] In this solution, the second partition plate and a third partition plate arranged in parallel along the height direction of the battery pack are arranged on the top of the first body.

[0010] In this embodiment, the battery pack further includes a printed circuit board fixedly connected to the connector, the first body includes a fixing member, the printed circuit board is provided with a fixing hole, and the fixing member can extend into the fixing hole to fix the first body relative to the connector.

[0011] The fixing member is a protruding column extending along the height direction of the battery pack, and the printed circuit board and the first body are riveted together by the fixing member; or,

[0012] The fixing member is a screw, the printed circuit board is threadedly connected to the first body via the fixing member, the first body has an escape space, and the screw can extend into the escape space.

[0013] In this solution, the end plate includes an avoidance portion that is recessed downward along the height direction of the battery pack, and a limited matching groove is arranged in the avoidance portion. The first body also includes a matching portion, and the first body is installed on the avoidance portion. The matching portion is located in the limited matching groove, and the bottom wall of the limited matching groove along the length direction of the battery pack is used to limit the matching portion from detaching from the limited matching groove.

[0014] In this embodiment, the end plate further includes a snap-in hole, and the first body further includes a first buckle, the first buckle is snap-fitted with the snap-in hole, the inner wall of the snap-in hole has a first inclined surface, and the first buckle has a second inclined surface. During the snap-in connection between the first buckle and the snap-in hole, the first inclined surface and the second inclined surface slide together.

[0015] In this solution, the second body includes a mounting base for fixing the electrical connection row, and the first output pole seat assembly also includes a protective cover, which is detachably connected to the second body, and a safety gap H is provided between the protective cover and the second body along the height direction of the battery pack.

[0016] The protective cover includes at least a second buckle and a third buckle, the second body includes a first baffle wall along the width direction of the battery pack and a second baffle wall along the length direction of the battery pack, the first baffle wall is provided with a first card slot, the second baffle wall is provided with a second card slot, the first card slot is snap-fitted with the second buckle, and the second card slot is snap-fitted with the third buckle.

[0017] The second buckle can move or elastically deform relative to the second body to release the connection between the protective cover and the second body.

[0018] In this embodiment, the protective cover also includes a first limiting wall and a second limiting wall arranged at intervals along the width direction of the battery pack, and a third limiting wall arranged along the length direction of the battery pack, and the second body also includes a third retaining wall arranged along the width direction of the battery pack.

[0019] Among them, the third clip is arranged on the third limiting wall, the first limiting wall and the second clip are located on both sides of the first retaining wall, and the first limiting wall abuts against the first retaining wall, the second limiting wall abuts against the third retaining wall, and the first limiting wall and the second limiting wall both abut against the second retaining wall.

[0020] In this solution, the battery pack further includes at least one second output pole seat assembly, and the second output pole seat assembly includes the first body. The first body and the second body of the first output pole seat assembly are integrally formed.

[0021] Alternatively, the first output pole seat assembly includes a mounting plate and at least two first bodies, and adjacent first bodies are connected by the mounting plate along the width direction of the battery pack. The first body, the second body and the mounting plate are integrally formed.

[0022] A second aspect of the present application further provides an energy storage box, which includes an inverter, a battery management system and at least one battery pack, wherein the battery pack is the battery pack described above.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic diagram of the structure of the energy storage box provided in this application in a specific embodiment;

[0026] Figure 2 A schematic diagram of the structure of a battery pack provided in this application in a specific embodiment;

[0027] Figure 3A schematic diagram of the structure of a battery module provided in this application in a specific embodiment;

[0028] Figure 4 for Figure 3 A partial enlarged view of part A;

[0029] Figure 5 This is a schematic structural diagram of the end plate, the first output pole seat assembly and the second output pole seat assembly provided in the present application in a specific embodiment;

[0030] Figure 6 This is a schematic structural diagram of the end plate and the first output pole seat assembly provided in the present application in a specific embodiment;

[0031] Figure 7 This is a schematic structural diagram of an end plate provided in this application in a specific embodiment;

[0032] Figure 8 This is a schematic structural diagram of a first output pole seat assembly provided in the present application in a specific embodiment;

[0033] Fig. 9 A schematic structural diagram of another perspective of a first output pole seat assembly provided in the present application in a specific embodiment;

[0034] Fig.10 for Figure 8 A front view of

[0035] Fig.11 A schematic structural diagram of the first output pole seat assembly provided in the present application in another specific embodiment;

[0036] Fig.12 for Fig.11 Rear view of

[0037] Fig.13 A schematic structural diagram of a second output pole seat assembly provided in the present application in a specific embodiment;

[0038] Fig.14 for Figure 5 Partial cross-sectional view of AA;

[0039] Fig.15 for Fig.14 A partial enlarged view of part B;

[0040] Fig.16 for Fig.10 Cross-section of the middle BB;

[0041] Fig.17 for Fig.10 Cross-section of the middle CC;

[0042] Fig.18An exploded view of a first output pole seat assembly provided in the present application in a specific embodiment;

[0043] Fig.19 for Fig.11 Cross-sectional view of the middle DD;

[0044] Fig. 20 A schematic diagram of the structure of a protective cover provided in the present application in a specific embodiment;

[0045] Fig.21 A partial structural schematic diagram of a first output pole seat assembly provided in the present application in a specific embodiment;

[0046] Fig. 22 This is a schematic diagram of a portion of the structure of a fastening pin provided in the present application in a specific embodiment.

[0047] Description of reference numerals:

[0048] 1-Battery pack;

[0049] 11-Battery module;

[0050] 111-end plate;

[0051] 1111-Avoidance Department;

[0052] 1111a-limiting matching groove;

[0053] 1112-card connection hole;

[0054] 1112a- first inclined surface;

[0055] 112-electrical connection row;

[0056] 114-connector;

[0057] 1141 - public end;

[0058] 1142-female end;

[0059] 1142a-installation part;

[0060] 115-printed circuit board;

[0061] 1151-fixing hole;

[0062] 2- first output pole seat assembly;

[0063] 21-First ontology;

[0064] 211-Plate body;

[0065] 212- first partition;

[0066] 213- second partition;

[0067] 214-third partition;

[0068] 215-fixing parts;

[0069] 216-avoidance space;

[0070] 217-cooperation part;

[0071] 218-first buckle;

[0072] 2181-Second slope;

[0073] 219-cavity;

[0074] 2191-first cavity;

[0075] 2192-second cavity;

[0076] 22- Second body;

[0077] 221-First retaining wall;

[0078] 2211-first card slot;

[0079] 222-Second retaining wall;

[0080] 2221-second card slot;

[0081] 223-second through hole;

[0082] 224-mounting seat;

[0083] 225-third retaining wall;

[0084] 23-protective cover;

[0085] 231-first limiting wall;

[0086] 232-second buckle;

[0087] 233-second limiting wall;

[0088] 234-third limiting wall;

[0089] 2341-third buckle;

[0090] 235-first through hole;

[0091] 236- extension;

[0092] 24-fastening pin;

[0093] 241- deformation part;

[0094] 242-fixed part;

[0095] 25-Mounting plate;

[0096] 3- second output pole seat assembly;

[0097] 4- opening;

[0098] 5-Nickel sheet. DETAILED DESCRIPTION

[0099] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0100] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0101] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0102] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0103] The battery pack 1 provided in this application can be used in an energy storage box, please refer to Figure 1 The energy storage box includes a cabinet, an inverter and at least one battery pack 1. The cabinet has a receiving cavity, and the inverter and the battery pack 1 are accommodated in the receiving cavity. The inverter is used to convert direct current into alternating current. The inverter has the advantages of high conversion efficiency, fast startup speed, high safety, etc., and can also have the functions of short circuit, overload, over / under voltage and over-temperature protection.

[0104] Some large energy storage boxes may also include a battery management system, which is used to make the battery pack 1 operate within a safe working range. The battery management system can control the charging and discharging power of the battery pack 1 according to factors such as ambient temperature, battery status, and power demand, thereby improving the safety of the battery pack 1 and making the working state of the battery pack 1 more reasonable, which is beneficial to improving the battery life and service life of the battery pack 1.

[0105] Please refer to Figure 2The battery pack 1 includes a box body and at least one battery module 11, and the battery module 11 is accommodated in the box body. The box body can be made of aluminum, aluminum alloy or other metal materials, or can also be made of non-metallic materials. The box body is used to provide a storage space for the battery module 11, and the box body can adopt a variety of structures.

[0106] In some embodiments, the box body may include a bottom cover and an upper box cover, the bottom cover is a structure with an open top, the size of the upper box cover is equivalent to the size of the top opening of the bottom cover, the upper box cover can be covered on the bottom cover, and the upper box cover and the bottom cover can be connected by bolts and other fixings, and the upper box cover and the bottom cover enclose a storage space for accommodating the battery module 11. The box body may be in various shapes, such as a cylinder, a cuboid, etc.

[0107] A sealing member may also be provided between the upper box cover and the bottom cover to seal the accommodating space.

[0108] In the battery pack 1, the battery module 11 includes a plurality of battery cells, which may be secondary batteries. The plurality of battery cells may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the plurality of battery cells are connected in series and in parallel. In some embodiments, the plurality of battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole composed of the plurality of battery cells is accommodated in a box. The plurality of battery cells may be arranged side by side along the length direction X of the battery pack 1, or may be arranged side by side along the width direction Y of the battery pack 1.

[0109] In other embodiments, multiple battery cells may be connected in series, in parallel, or in mixed connection to form a battery module 11, and then multiple battery modules 11 may be connected in series, in parallel, or in mixed connection to form a whole and accommodated in a box. The battery module 11 includes a frame structure, which may include an end plate 111, a side plate, a top plate, and a bottom plate connected to each other. Multiple battery cells are located in the inner cavity of the frame structure and are stacked in the inner cavity of the frame structure. The stacking direction may be the length direction X, the width direction Y, or the height direction Z.

[0110] In addition, the battery pack 1 may also include other structures, such as a busbar component, for achieving electrical connection between multiple battery cells.

[0111] The battery cell may be cylindrical, flat, rectangular or in other shapes.

[0112] In addition, the battery cell includes a shell, a top cover, a bare cell and other functional components.

[0113] In some embodiments, the shell and the top cover can be independent components. The shell has an opening, and the top cover covers the opening of the shell to isolate the internal environment of the battery cell from the external environment. The internal environment surrounded by the shell and the top cover can be used to accommodate bare cells, electrolytes and other components. In other embodiments, the top cover and the shell can also be integrated. Specifically, the top cover and the shell can form a common connection surface before other components are placed in the shell. When the interior of the shell needs to be encapsulated, the top cover covers the shell.

[0114] The shell can be in various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the bare battery cell. The shell can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0115] The present application embodiment provides a battery pack 1, such as Figure 2-Figure 4 As shown, the battery pack 1 includes a battery module 11, a connector 114 and a first output pole seat assembly 2. The battery module 11 includes an end plate 111, an electrical connection row 112 and a plurality of battery cells. The plurality of battery cells are located between the end plates 111, and the electrical connection row 112 is electrically connected to the battery cells. The connector 114 is electrically connected to the electrical connection row 112. The first output pole seat assembly 2 includes a first body 21 for fixing the connector 114 and a second body 22 for fixing the electrical connection row 112. Figure 8 and Fig.11 As shown, the first body 21 includes a plate body 211 and at least two first partitions 212 arranged at intervals, the first partition 212 protrudes relative to the plate body 211 along the length direction X of the battery pack 1, and there is at least one cavity 219 between the plate body 211 and the first partition 212.

[0116] It should be noted that if Figure 3 As shown, the length direction of the battery pack may be the X direction in the figure, the width direction of the battery pack may be the Y direction in the figure, and the height direction of the battery pack may be the Z direction in the figure.

[0117] The following is Figure 8 The current flow direction of the first output pole seat assembly 2 in the illustrated embodiment is described in detail.

[0118] Specifically, if Fig.10 , Fig.16 and Fig.17As shown, along the height direction Z of the battery pack 1 , the plate body 211 of the first body 21 and the first partition plate 212 at least enclose a first cavity 2191 and a second cavity 2192 . When an electrical fault occurs in the battery pack 1, such as when the low-voltage connector 114 leaks, taking the current flowing toward the end plate 111 along the height direction Z of the battery pack 1 as an example, the current flows toward the first cavity 2191 through the first partition 212, and the current flows around in the first cavity 2191 (flows through the side wall of the first cavity 2191 to the surface of the plate 211 located in the first cavity 2191, and then flows to the next side wall of the first cavity 2191), and then the current continues to flow downward to the next first partition 212, and then the current can flow into the second cavity 2192 and flow around (flows through the side wall of the second cavity 2192 to the surface of the plate 211 located in the second cavity 2192, and then flows to the next side wall of the second cavity 2192), thereby increasing the path for the current to creep along the length direction X of the battery pack 1, which is beneficial to increase the creepage distance, greatly reducing the risk of creepage between the connector 114 and the end plate 111, and thus reducing the risk of creepage between live metal parts.

[0119] Therefore, when an electrical fault occurs in the battery pack 1, such as leakage, the current can flow through the at least one cavity 219 enclosed between the plate body 211 and the first partition 212, even if the current needs to cross the first partition 212 to flow to the charged metal parts. This can increase the creepage distance, so that the creepage current between two charged metal parts cannot reach in a straight line, thereby reducing the risk of creepage between metal parts such as the connector 114 and the end plate 111, and reducing the risk of safety hazards, which is beneficial to improving the electrical safety performance of the battery pack 1 and ensuring the safety of the battery pack 1 when in use.

[0120] Similarly, if Fig.11 In the embodiment shown, there is also at least one cavity 219 between the plate body 211 and the first partition 212, and the current can also flow around in the cavity 219, that is, the current needs to cross the first partition 212 to flow to the charged metal part, which is similar to the above Figure 8 The principle of current flowing in the cavity 219 in the embodiments is the same, so it will not be repeated here.

[0121] Among them, the end plate 111 can be made of metal materials such as aluminum alloy, and the material of the first output pole seat assembly 2 can be made of plastic materials such as polypropylene (PP), polybutylene terephthalate + glass fiber (PBT+GF), acrylonitrile, butadiene, styrene terpolymer (ABS), etc., that is, the first output pole seat assembly 2 is an insulating material, and the cavity 219 enclosed by the plate body 211 and the first partition plate 212 provided on the first body 21 is beneficial to enhancing the insulation protection between the live metal parts such as the electrical connection row 112, the connector 114 and the end plate 111.

[0122] In addition, if Fig. 9 and Fig.12 As shown, the back side of the first output pole seat assembly 2 may also be formed with the above-mentioned multiple cavities 219, which is beneficial to further reduce the risk of creepage between live metal parts and improve safety in use.

[0123] In addition, the first body 21 and the second body 22 in the first output pole seat assembly 2 are integrally formed, which is beneficial to reducing the number of parts and the process of separately installing the first body 21 and the second body 22, thereby improving assembly efficiency and reducing assembly costs.

[0124] In a possible implementation, Figure 8 and Fig.11 As shown, the first partition 212 is perpendicular to the height direction Z of the battery pack 1 to facilitate processing and improve the structural strength of the first body 21 .

[0125] In a possible implementation, Figure 8 and Fig.16 As shown, the first body 21 further includes at least two second partitions 213 spaced apart from each other, the second partitions 213 connect adjacent first partitions 212, and along the length direction X of the battery pack 1, the second partitions 213 have a first distance L to the surface of the first partition 212, satisfying 5mm≤L≤10mm. In some embodiments, the first distance L can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0126] In this embodiment, at least two second partitions 213 are arranged in the first cavity 2191 and the second cavity 2192 at intervals along the width direction Y of the battery pack 1, so that the first cavity 2191 and the second cavity 2192 form a plurality of bypass cavities. The second partition 213 is used to support two adjacent first partitions 212 to enhance the risk of the first partition 212 resisting torsion or deformation, thereby reinforcing the first cavity 2191 and the second cavity 2192, which is beneficial to improving the structural strength of the first body 21. At the same time, the first partition 212 is perpendicular to the height direction Z of the battery pack 1, and the second partition 213 is parallel to the height direction Z of the battery pack 1, so that the first partition 212 and the second partition 213 form a square grid structure, and the formed mesh structure is beneficial to strengthening the structural strength of the first body 21.

[0127] At the same time, if Fig.10 and Fig.16 , Fig.17As shown, during the process of current creepage, the current can flow through the surface of the plate body 211 located in the first cavity 2191 and the second cavity 2192 and through the surface of the second partition 213. Along the length direction X of the battery pack 1, there is a first distance L between the second partition 213 and the surface of the first partition 212, that is, the second partition 213 needs to be lower than the surface of the first partition 212. During the process of current creepage through the second partition 213, the current can flow around along the length direction X of the battery pack 1. The length of the bypass path is at least four first distances, which is conducive to increasing the creepage distance of the current.

[0128] When the first distance L is too small, in the process of current creeping through the second partition 213, the path of current bypassing is greatly reduced along the length direction X of the battery pack 1, thereby greatly reducing the current creeping distance and increasing the risk of creeping between metal parts such as the connector 114 and the end plate 111; when the first distance L is too large, that is, along the length direction X of the battery pack 1, the protrusion length of the second partition 213 relative to the plate body 211 is small, and the area of ​​the connection structure with the first partition 212 is greatly reduced, which greatly reduces the supporting effect of the second partition 213 on the first partition 212, which is not conducive to the stability of the structure of the first body 21. Therefore, in this embodiment, satisfying 5mm≤L≤10mm can greatly increase the path of current bypassing, and can make the second partition 213 have a good supporting effect on the first partition 212, so that the first body 21 has good structural stability.

[0129] In one possible manner, the second partition 213 can also increase the creepage distance along the length direction X of the battery pack 1, that is, the current can flow through the second partition 213 and over the second partition 213 along the width direction Y of the battery pack 1, further improving the electrical safety performance of the battery pack 1.

[0130] In a possible implementation, Figure 8 As shown, a second partition 213 and a third partition 214 arranged parallel to the height direction Z of the battery pack 1 are arranged on the top of the first body 21 .

[0131] In this embodiment, the third partition 214 can be used for current to flow around along the height direction Z of the battery pack 1, that is, to increase the creepage distance of the current along the height direction Z of the battery pack 1, so that the current needs to cross the third partition 214 to flow to the charged metal parts (such as the current needs to cross the third partition 214 to flow from the connector 114 to the end plate 111), and the second partition 213 on the top of the first body 21 is used to connect at least two third partitions 214 along the length direction X of the battery pack 1, so that the top wall of the first body 21 is roughly a mesh structure, so as to increase the creepage distance and further improve the safety of the battery pack 1. At the same time, the second partition 213 on the top of the first body 21 can support the third partition 214, which is conducive to improving the strength of the third partition 214, and makes the top of the first body 21 roughly a mesh structure, which is conducive to further improving the structural strength of the first body 21.

[0132] In a possible implementation, the second partition 213 at the top of the first body 21 can also be used for current to flow around along the height direction Z of the battery pack 1, that is, to increase the creepage distance of the current along the height direction Z of the battery pack 1, so that the current needs to cross the second partition 213 at the top of the first body 21 to flow to the charged metal parts (such as the current needs to cross the second partition 213 at the top of the first body 21 along the width direction Y of the battery pack 1 to flow from the connector 114 to the electrical connection row 112). Therefore, the second partition 213 and the third partition 214 are provided on the top of the first body 21 to increase the creepage distance, so that the creepage current between the charged metal parts connected to the first output pole seat assembly 2 cannot reach in a straight line, thereby reducing the risk of creepage and improving the electrical safety performance of the battery pack 1.

[0133] Among them, Figure 4 As shown, the top of the first body 21 also includes an opening 4, and the connector 114 includes a male end 1141 and a female end 1142. The male end 1141 and the female end 1142 are detachably connected, and the female end 1142 is provided with a mounting portion 1142a, which protrudes relative to the female end 1142, and the mounting portion 1142a can be elastically deformed so that the female end 1142 and the male end 1141 can be snap-fitted. The opening 4 can avoid the mounting portion 1142a, and a person can put his hand into the opening 4 to drive the mounting portion 1142a to deform, thereby improving the convenience of connecting the male end 1141 and the female end 1142 and facilitating assembly.

[0134] In addition, in a possible embodiment, the bottom wall of the opening portion 4 may be tilted downward along the height direction Z of the battery pack 1 so that personnel have a larger operating space along the height direction Z of the battery pack 1 to drive the installation portion 1142a to deform elastically.

[0135] In a possible implementation, Figure 4 and Figure 8As shown, the battery pack 1 also includes a printed circuit board 115 (Printed Circuit Board-PCB) fixedly connected to the connector 114, and the first body 21 includes a fixing member 215. The printed circuit board 115 is provided with a fixing hole 1151, and the fixing member 215 can extend into the fixing hole 1151 to relatively fix the first body 21 and the connector 114.

[0136] In this embodiment, the connector 114 is connected to the printed circuit board 115 by soldering, and the first body 21 is connected to the printed circuit board 115 via the fixing member 215, so that the connector 114 is fixed to the first body 21, so that the printed circuit board 115 can be used to collect signals such as temperature and voltage during the operation of the battery cell, and the collected signals are output through the connector 114, which is beneficial to improving the working performance of the battery pack 1.

[0137] In addition, if Figure 4 As shown, the electrical connection bar 112 is electrically connected to the printed circuit board 115 via the nickel sheet 5 .

[0138] In a possible implementation, Figure 4 , Figure 8 and Fig.11 As shown, the fixing member 215 is a raised column extending along the height direction Z of the battery pack 1, and the printed circuit board 115 and the first body 21 are riveted together by the fixing member 215; or, the fixing member 215 is a screw, and the printed circuit board 115 and the first body 21 are threadedly connected by the fixing member 215, and the first body 21 has an avoidance space 216, and the screw can extend into the avoidance space 216.

[0139] In one embodiment, when the fastener is a screw (not shown in the figure), the first body 21 is detachably connected to the printed circuit board 115, so that the connector 114 is detachably connected to the first output pole seat assembly 2, so as to replace and repair the first output pole seat assembly 2 and the connector 114. At the same time, the avoidance space 216 is used to avoid the screw, so that the screw can extend into the avoidance space 216 during the threaded connection process, thereby improving the feasibility of the threaded connection between the first body 21 and the printed circuit board 115, thereby improving the feasibility of the connection between the first output pole seat assembly 2 and the connector 114.

[0140] In another embodiment, when the fastener is a raised column, during the process of connecting the connector 114 to the first body 21 via the printed circuit board 115, the raised column extends into the fixing hole 1151, and then the end of the raised column is hot-riveted to form a mushroom-shaped structure, so that the diameter of the end of the hot-riveted raised column is larger than the diameter of the fixing hole 1151, so that the raised column cannot be detached through the fixing hole 1151, thereby fixing the connector 114 to the first body 21. Connection by riveting does not require the introduction of additional components, reduces the number of components, and facilitates operation.

[0141] In a possible implementation, Figure 7 Figure 8 ,and Fig.14 As shown, the end plate 111 includes an avoidance portion 1111 which is recessed downward along the height direction Z of the battery pack 1, and a limited matching groove 1111a is arranged in the avoidance portion 1111. The first body 21 also includes a matching portion 217. The first body 21 is installed on the avoidance portion 1111, and the matching portion 217 is located in the limited matching groove 1111a. The bottom wall of the limited matching groove 1111a along the length direction X of the battery pack 1 is used to limit the matching portion 217 from being separated from the limited matching groove 1111a.

[0142] In this embodiment, the first body 21 can be located in the avoidance portion 1111, and the side wall of the avoidance portion 1111 can limit the movement of the first body 21 relative to the end plate 111 along the width direction Y of the battery pack 1. At the same time, along the length direction X of the battery pack 1, the matching portion 217 can extend into the limiting matching groove 1111a and engage with each other, so that the limiting matching groove 1111a can limit the relative movement of the first body 21 along the width direction Y and the height direction Z of the battery pack 1, and the bottom wall of the limiting matching groove 1111a can be used to limit the movement of the first body 21 away from the battery cell along the length direction X of the battery pack 1, thereby reducing the risk of relative movement between the first body 21 and the end plate 111, thereby reducing the risk of relative movement between the first output pole seat assembly 2 and the end plate 111, which is conducive to improving the reliability and stability of the connection between the first output pole seat assembly 2 and the end plate 111. In addition, the limiting matching groove 1111a is located in the avoidance portion 1111, which is beneficial to reducing the volume of the end plate 111 along the length direction X of the battery pack 1 compared to the limiting matching groove 1111a being set at other positions of the end plate 111, so that the surface of the first body 21 along the length direction X of the battery pack 1 can be flush with the surface of the end plate 111, thereby improving the overall aesthetics of the battery pack 1.

[0143] In a possible implementation, Fig.15As shown, the end plate 111 also includes a snap-in hole, and the first body 21 also includes a first snap-in 218. The first snap-in 218 is snap-fitted with the snap-in hole 1112. The inner wall of the snap-in hole 1112 has a first inclined surface 1112a. The first snap-in 218 has a second inclined surface 2181. During the snap-in connection between the first snap-in 218 and the snap-in hole 1112, the first inclined surface 1112a and the second inclined surface 2181 are slidably fitted.

[0144] In this embodiment, the first buckle 218 can be a hook structure, and the first buckle 218 and the snap-fitting hole 1112 can limit the relative movement of the first body 21 relative to the end plate 111 along the length direction X of the battery pack 1, further improving the reliability and stability of the connection between the first output pole seat assembly 2 and the end plate 111. At the same time, during the connection between the first body 21 and the end plate 111, the first inclined surface 1112a and the second inclined surface 2181 slide and cooperate, which can guide the snap-fitting of the first buckle 218 and the snap-fitting hole 1112, and improve the smoothness of the connection between the first body 21 and the end plate 111 for easy connection.

[0145] In some embodiments, Figure 7 As shown, along the width direction Y of the battery pack 1, two limiting matching grooves 1111a are provided in one avoiding portion 1111, and a clamping hole 1112 is provided between the two limiting matching grooves 1111a. Figure 8 and Fig.14 As shown, along the width direction Y of the battery pack 1, the first body 21 is provided with two mating parts 217 at intervals, and a first buckle 218 is provided between the two mating parts 217. Along the width direction Y of the battery pack 1, the side walls of the two mating parts 217 away from the first buckle 218 abut against the limiting groove, and the side walls of the two mating parts 217 close to the first buckle 218 do not abut against the limiting groove, which is conducive to reducing tolerances, facilitating production and processing, and reducing the difficulty of the first body 21 and the end plate 111 to facilitate assembly.

[0146] In a possible implementation, Figure 8 and Fig.10 As shown, the second body 22 includes a mounting base 224 for fixing the electrical connection row 112, and the first output pole seat assembly 2 also includes a protective cover 23, which is detachably connected to the second body 22, and there is a safety gap H between the protective cover 23 and the second body 22 along the height direction Z of the battery pack 1.

[0147] In this embodiment, the electrical connection row 112 is fixed to the mounting seat 224 by screws, and the protective cover 23 can cover the electrical connection row 112, which is beneficial to improve the protection effect. At the same time, the protective cover 23 has an extension portion 236 extending along the height direction Z of the battery pack 1, so that there is a minimum safety gap H between the extension portion 236 and the second body 22, so that the operator cannot accidentally touch the electrical connection row 112 between the protective cover 23 and the second body 22, thereby improving the safety of the battery pack 1.

[0148] In addition, if Figure 8 As shown, the top of the second body 22 is also provided with a plurality of partitions, so that the top of the second body 22 is roughly a mesh structure, increasing the creepage distance, the principle is the same as the above creepage principle, and will not be repeated here. At the same time, the structural strength of the second body 22 can also be improved.

[0149] The material of the electrical connection bar 112 can be aluminum alloy, copper alloy, nickel alloy or a plated layer of an alloy material.

[0150] In a possible implementation, Fig.12 and Figure 19-21 As shown, the protective cover 23 at least includes a second buckle 232 and a third buckle 2341, the second body 22 includes a first retaining wall 221 along the width direction Y of the battery pack 1 and a second retaining wall 222 along the length direction X of the battery pack 1, the first retaining wall 221 is provided with a first clamping groove 2211, the second retaining wall 222 is provided with a second clamping groove 2221, the first clamping groove 2211 is clamped and matched with the second buckle 232, and the second clamping groove 2221 is clamped and matched with the third buckle 2341. The second buckle 232 can move or elastically deform relative to the second body 22, so that the protective cover 23 is disconnected from the second body 22.

[0151] In this embodiment, the second clip 232 protrudes along the width direction Y of the battery pack 1, and the third clip 2341 protrudes along the length direction X of the battery pack 1, that is, the second clip 232 and the third clip 2341 are asymmetrically arranged on the protective cover 23. When the protective cover 23 is connected to the second body 22, the first clip groove 2211 is engaged with the second clip 232, and the second clip groove 2221 is engaged with the third clip 2341 to limit the protective cover 23 and the second body 22 from detaching from each other along the height direction Z of the battery pack 1.

[0152] Therefore, the second clip 232 and the third clip 2341 are asymmetrically arranged on the protective cover 23, so that the protruding directions of the second clip 232 and the third clip 2341 are different, so that the direction of the force driving the second clip 232 to release the snap fit with the first slot 2211 is different from the direction of the force driving the third clip 2341 to release the snap fit with the second slot 2221. When the battery pack 1 vibrates, since the vibration directions of the battery pack 1 are often the same, the second clip 232 and the third clip 2341 cannot be released from the second body 22 at the same time during vibration, thereby greatly reducing the risk of the protective cover 23 and the second body 22 being detached from each other, thereby reducing the risk of fire, explosion, etc. caused by the protective cover 23 falling off, and greatly improving the safety performance of the battery pack 1.

[0153] In a possible implementation, Fig.12 and Figure 19-21 As shown, the protective cover 23 further includes a first limiting wall 231 and a second limiting wall 233 arranged at intervals along the width direction Y of the battery pack 1, and a third limiting wall 234 arranged along the length direction X of the battery pack 1, and the second body 22 further includes a third retaining wall 225 arranged along the width direction Y of the battery pack 1;

[0154] Among them, the third buckle 2341 is set on the third limiting wall 234, the first limiting wall 231 and the second buckle 232 are located on both sides of the first retaining wall 221, and the first limiting wall 231 abuts against the first retaining wall 221, the second limiting wall 233 abuts against the third retaining wall 225, and the first limiting wall 231 and the second limiting wall 233 both abut against the second retaining wall 222.

[0155] In this embodiment, when the protective cover 23 is engaged with the second body 22, along the width direction Y of the battery pack 1, the first limiting wall 231 abuts against the first blocking wall 221, and the second limiting wall 233 abuts against the third blocking wall 225, so as to limit the relative movement of the protective cover 23 relative to the second body 22 along the width direction Y of the battery pack 1. At the same time, along the length direction X of the battery pack 1, the first limiting wall 231 and the second limiting wall 233 abut against the second blocking wall 222, and the third limiting wall 234 abuts against the second blocking wall 222, so as to limit the relative movement of the protective cover 23 relative to the second body 22 along the height direction Z of the battery pack 1.

[0156] Therefore, the limiting walls of the protective cover 23 abut against the retaining walls of the second body 22 to limit the relative movement of the protective cover 23 and the second body 22 along the width direction Y and the length direction X of the battery pack 1, further improving the reliability and stability of the connection between the protective cover 23 and the second body 22.

[0157] In summary, the second clip 232, the third clip 2341 are snap-fitted with the corresponding first slot 2211, the second slot 2221 and the limiting walls are abutted against the corresponding retaining walls to limit the protective cover 23 from being separated from the second body 22 along the length direction X, width direction Y and height direction Z of the battery pack 1, thereby greatly increasing the firmness of the protective cover 23 and the second body 22, thereby greatly reducing the risk of the protective cover 23 and the second body 22 being loosened due to vibration of the battery pack 1.

[0158] In addition, in this embodiment, since the second buckle 232 protrudes along the width direction Y of the battery pack 1, when the battery pack 1 is subjected to a vibration force along the width direction Y, the second buckle 232 is likely to generate a risk of being released from the first slot 2211. Even if the second buckle 232 is released from the first slot 2211, the protective cover 23 is still restricted from relative movement with the second body 22 along the width direction Y, length direction X and height direction Y of the battery pack 1 by the cooperation of the third buckle and the second slot 2221, and the abutment of each limiting wall with each corresponding retaining wall, so that the protective cover 23 cannot be released from the second body 22, thereby improving the firmness of the connection between the protective cover 23 and the second body 22, and making the first output pole seat assembly 2 have good anti-vibration performance.

[0159] When the protective cover 23 needs to be removed from the second cover body, the second buckle 232 is driven to move or elastically deform (such as bending the second buckle 232) so that the second buckle 232 forms a certain angle with the width direction Y of the battery pack 1 on the surface formed by the width direction Y and the height direction Z of the battery pack 1, so that the second buckle 232 is released from the first slot 2211, and the protective cover 23 is relatively tilted relative to the second body 22, so that the protective cover 23 is disconnected from the second body 22. The above-mentioned disassembly method of driving the buckle located on the side of the protective cover 23 to move or deform is conducive to reducing the risk of damaging the structure of the protective cover 23 and the second body 22, and is conducive to reducing the cost of disassembly and maintenance.

[0160] In addition, the third buckle 2341 can also move or elastically deform relative to the second body 22 to facilitate the connection and detachment of the protective cover 23 and the second body 22.

[0161] In another possible implementation, Fig.18 and Fig. 22 As shown, the first output pole seat assembly further includes a fastening pin 24, the protective cover 23 includes a first through hole 235, and the second body 22 includes a second through hole 223. The fastening pin 24 connects the protective cover 23 and the second body 22 detachably via the first through hole 235 and the second through hole 223.

[0162] In this embodiment, if Fig. 22As shown, the two ends of the fastening pin 24 include a fixed portion 242 and two deformable portions 241. The deformable portion 241 can be elastically deformed. The two deformable portions 241 can extend through the first through hole 235 and the second through hole 223. Along the width direction Y of the battery pack 1, the fixed portion 242 abuts against the second body 22, and the two deformable portions 241 deform in a direction away from each other, so that the deformable portion 241 abuts against the second body 22 (for example, at this time the fastening pin 24 is roughly T-shaped), thereby making it impossible for the deformable portion 241 to detach from the first through hole 235 and the second through hole 223, so that the protective cover 23 and the second body 22 are fixed to each other. When the protective cover 23 needs to be removed from the second body 22, the two deformable portions 241 are driven to move closer to each other and abut against each other, so that the deformable portion 241 of the fastening pin 24 is linear, that is, Fig. 22 The fastening pin 24 shown in the figure enables both the deformation parts 241 to be disengaged through the first through hole 235 and the second through hole 223, thereby disconnecting the protective cover 23 from the second body 22. Therefore, the protective cover 23 and the second body 22 are connected by the fastening pin 24, which is conducive to improving the stability of the connection between the protective cover 23 and the second body 22, improving the vibration resistance of the battery pack 1, and the protective cover 23 and the second body 22 will not be damaged during disassembly.

[0163] In addition, the fastening pin 24 in this embodiment can also be used in Fig.19 In the illustrated embodiment, as long as the first through hole 235 is disposed on the first limiting wall 231 and the second limiting wall 233 , and the second through hole 223 is disposed on the first retaining wall 221 and the third retaining wall 225 , the stability of the connection between the protective cover 23 and the second body 22 can be further improved.

[0164] In a possible implementation, Figure 5 and Fig.13 As shown, the battery pack 1 further includes at least one second output pole seat assembly 3, and the second output pole seat assembly 3 includes a first body 21. The first body 21 and the second body 22 of the first output pole seat assembly 2 are integrally formed.

[0165] In this embodiment, if Fig.13 As shown, the battery pack 1 may include a plurality of connectors 114, and the first body 21 of the second output pole seat assembly 3 is used to fix the connector 114 to improve the collection and output performance of the battery pack 1. The second output pole seat assembly 3 is also provided with the above-mentioned mating portion 217 and the first buckle 218, and the end plate 111 is also provided with a mating groove and a snap-on hole 1112 that are mating with the second output pole seat assembly 3, so that the second output pole seat assembly 3 can be fixed on the end plate 111. At the same time, the first body 21 of the second output pole seat assembly 3 also has a mesh structure formed by the above-mentioned plate body 211 and a plurality of partitions, which reduces the risk of creepage between live metal parts.

[0166] In a possible implementation, Figure 6 and Fig.11 As shown, the first output pole seat assembly includes a mounting plate 25 and at least two first bodies 21, and along the width direction Y of the battery pack 1, adjacent first bodies 21 are connected by the mounting plate 25. The first body 21, the second body 22 and the mounting plate 25 are integrally formed.

[0167] In this embodiment, at least two first bodies 21 are used to fix the connector 114. The mounting plate 25 is provided with a first buckle 218, and the end plate 111 is provided with at least one snap-fitting hole 1112 that snaps with the first buckle 218 of the mounting plate 25, which is conducive to reducing the processing steps of the first output pole seat assembly 2 and reducing production costs. At the same time, the first body 21, the second body 22 and the mounting plate 25 are integrally formed, and the first body 21 and the second body 22 are independently set, which reduces the process of multiple assembly and improves efficiency. At the same time, the structural stability of the integrally formed first output pole seat assembly 2 is relatively high, and it can reduce the risk of a single component detaching from the end plate 111, and improve the stability of the first output pole seat assembly 2 installed on the end plate 111.

[0168] The present application also provides an energy storage box, such as Figure 1 As shown, the energy storage box includes an inverter, a battery management system and at least one battery pack 1, wherein the battery pack 1 is the battery pack 1 in any of the above embodiments.

[0169] When the battery pack 1 is used in an energy storage box, there is at least one cavity 219 between the plate body 211 and the first partition 212 of the first output pole seat assembly 2 of the battery pack 1, so that the current can flow through the cavity 219, even if the current needs to cross the first partition 212 to flow to the charged metal parts, thereby increasing the creepage distance, so that the creepage current between two charged metal parts cannot reach in a straight line, so as to reduce the risk of creepage between metal parts such as the connector 114 and the end plate 111, reduce the risk of safety hazards, and thus help to improve the electrical safety performance of the energy storage box.

[0170] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: The battery pack (1) comprises: A battery module (11), the battery module (11) comprising an end plate (111), an electrical connection bar (112), and a plurality of battery cells, the plurality of battery cells being located between the end plates (111), and the electrical connection bar (112) being electrically connected to the battery cells; A connector (114), the connector (114) being electrically connected to the electrical connection row (112); A first output pole seat assembly (2), the first output pole seat assembly (2) comprising a first body (21) for fixing the connector (114) and a second body (22) for fixing the electrical connection row (112); The first body (21) comprises a plate body (211) and at least two first partitions (212) arranged at intervals, the first partitions (212) protrude relative to the plate body (211) along a length direction (X) of the battery pack (1), and at least one cavity is provided between the plate body (211) and the first partitions (212); The battery pack (1) further comprises a printed circuit board (115) fixedly connected to the connector (114); the first body (21) comprises a fixing member (215); the printed circuit board (115) is provided with a fixing hole (1151); the fixing member (215) can extend into the fixing hole (1151) so that the first body (21) and the connector (114) are relatively fixed.

2. The battery pack according to claim 1, characterized in that: The first body (21) further comprises at least two second partitions (213) arranged at intervals, the second partitions (213) connecting adjacent first partitions (212), and along a length direction (X) of the battery pack (1), a first distance L is present between the second partitions (213) and the surface of the first partition (212), satisfying 5 mm ≤ L ≤ 10 mm; The first partition (212) is perpendicular to the height direction (Z) of the battery pack (1).

3. The battery pack according to claim 2, characterized in that: The top of the first body (21) is provided with the second partition plate (213) and a third partition plate (214) arranged in parallel along the height direction (Z) of the battery pack (1).

4. The battery pack according to claim 1, characterized in that: The fixing member (215) is a protruding column extending along the height direction (Z) of the battery pack (1), and the printed circuit board (115) and the first body (21) are riveted together via the fixing member (215); Alternatively, the fixing member (215) is a screw, the printed circuit board (115) is threadedly connected to the first body (21) via the fixing member (215), the first body (21) has an escape space (216), and the screw can extend into the escape space (216).

5. The battery pack according to claim 1, characterized in that: The end plate (111) comprises an avoidance portion (1111) which is recessed downwardly along the height direction (Z) of the battery pack (1), and a limited matching groove (1111a) is arranged in the avoidance portion (1111). The first body (21) also comprises a matching portion (217), and the first body (21) is mounted on the avoidance portion (1111), and the matching portion (217) is located in the limited matching groove (1111a), and the bottom wall of the limited matching groove (1111a) along the length direction (X) of the battery pack (1) is used to limit the matching portion (217) from leaving the limited matching groove (1111a).

6. The battery pack according to claim 1, characterized in that: The end plate (111) further comprises a snap-fitting hole (1112), and the first body (21) further comprises a first snap-fitting (218), the first snap-fitting (218) being snap-fitted with the snap-fitting hole (1112), the inner wall of the snap-fitting hole (1112) having a first inclined surface (1112a), the first snap-fitting (218) having a second inclined surface (2181), and during the snap-fitting process between the first snap-fitting (218) and the snap-fitting hole (1112), the first inclined surface (1112a) and the second inclined surface (2181) are slidably fitted.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The second body (22) comprises a mounting seat (224) for fixing the electrical connection row (112), and the first output pole seat assembly (2) further comprises a protective cover (23), the protective cover (23) being detachably connected to the second body (22), and a safety gap H is provided between the protective cover (23) and the second body (22) along a height direction (Z) of the battery pack (1); The protective cover (23) comprises at least a second buckle (232) and a third buckle (2341); the second body (22) comprises a first retaining wall (221) along a width direction (Y) of the battery pack (1) and a second retaining wall (222) along a length direction (X) of the battery pack (1); the first retaining wall (221) is provided with a first retaining groove (2211); the second retaining wall (222) is provided with a second retaining groove (2221); the first retaining groove (2211) is engaged with the second buckle (232); and the second retaining groove (2221) is engaged with the third buckle (2341); The second buckle (232) is capable of moving or elastically deforming relative to the second body (22) so as to release the connection between the protective cover (23) and the second body (22).

8. The battery pack according to claim 7, characterized in that: The protective cover (23) further comprises a first limiting wall (231) and a second limiting wall (233) arranged at intervals along the width direction (Y) of the battery pack (1), and a third limiting wall (234) arranged along the length direction (X) of the battery pack (1), and the second body (22) further comprises a third retaining wall (225) arranged along the width direction (Y) of the battery pack (1); The third buckle (2341) is arranged on the third limiting wall (234), the first limiting wall (231) and the second buckle (232) are located on both sides of the first retaining wall (221), the first limiting wall (231) abuts against the first retaining wall (221), the second limiting wall (233) abuts against the third retaining wall (225), and the first limiting wall (231) and the second limiting wall (233) both abut against the second retaining wall (222).

9. The battery pack according to any one of claims 1 to 6, characterized in that: The battery pack (1) further comprises at least one second output pole seat assembly (3), wherein the second output pole seat assembly (3) comprises the first body (21); The first body (21) and the second body (22) of the first output pole seat assembly (2) are integrally formed; Alternatively, the first output pole seat assembly (2) comprises a mounting plate (25) and at least two first bodies (21), and adjacent first bodies (21) are connected via the mounting plate (25) along a width direction (Y) of the battery pack (1); The first body (21), the second body (22) and the mounting plate (25) are integrally formed.

10. An energy storage box, characterized in that: The energy storage box comprises an inverter, a battery management system and at least one battery pack (1), wherein the battery pack (1) is the battery pack (1) according to any one of claims 1 to 9.

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