Battery pack and energy storage box

Abstract

The invention relates to a battery pack and an energy storage box, and belongs to the technical field of energy storage, the battery pack comprises a battery module, a connector and a first output pole seat assembly, the battery module comprises an end plate, an electric connection bar and a plurality of battery monomers, and the first output pole seat assembly comprises a second body used for fixing the electric connection bar. The second body comprises a mounting seat used for fixing the electric connection bar. The first output pole seat assembly further comprises a protective cover, the protective cover at least comprises a second buckle and a third buckle, the second body comprises a first retaining wall in the width direction of the battery pack and a second retaining wall in the length direction of the battery pack, the first retaining wall is provided with a first clamping groove, and the second retaining wall is provided with a second clamping groove. The first clamping groove is matched with the second buckle in a clamping mode, and the second clamping groove is matched with the third buckle in a clamping mode. And the second buckle and the third buckle are asymmetrically arranged on the protective cover, so that the risk that the protective cover is separated from the second body is reduced, and the use safety performance of the battery pack is improved.

Description

Technical Field

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

[0002] Traditional battery modules usually include output pole seats which are used to fix electrical connection rows. To reduce the risk of personnel accidentally touching the electrical connection rows, the output pole seats are generally provided with detachable protective covers which are used to cover the electrical connection rows to improve safety. However, when the battery pack is vibrated, there is a risk that the protective cover and the output pole seat are easily separated from each other, resulting in a reduction in the electrical safety performance of the battery pack, and even in severe cases, risks such as fire and explosion of the battery pack are likely to occur. Summary of the Invention

[0003] In view of this, the present application provides a battery pack and an energy storage box, aiming at the problem that when the battery pack is vibrated, there is a risk that the protective cover and the output pole seat are easily separated from each other, reducing safety.

[0004] The first aspect of the present application provides a battery pack, which includes:

[0005] A battery module, which 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;

[0006] A connector, which is electrically connected to the electrical connection row;

[0007] A first output pole seat assembly, which includes a second body for fixing the electrical connection row;

[0008] The second body includes a mounting seat for fixing the electrical connection row. The first output pole seat assembly further includes a protective cover along the height direction of the battery pack;

[0009] The protective cover at least includes a second buckle and a third buckle. The second buckle protrudes along the width direction of the battery pack, and the third buckle protrudes along the length direction of the battery pack;

[0010] The second body includes a first retaining wall along the width direction of the battery pack and a second retaining wall along the length direction of the battery pack. The first retaining wall is provided with a first slot, and the second retaining wall is provided with a second slot. The first slot is in snap-fit with the second buckle, and the second slot is in snap-fit with the third buckle.

[0011] In this solution, the second buckle and the third buckle are asymmetrically arranged on the protective cover so that the protruding directions of the second buckle and the third buckle are different, so that the direction of the force driving the second buckle to release the snap fit with the first slot is different from the direction of the force driving the third buckle to release the snap fit with the second slot. When the battery pack vibrates, since the vibration directions of the battery pack are often the same, the second buckle and the third buckle cannot be released from the second body at the same time during vibration, thereby greatly reducing the risk of the protective cover and the second body detaching from each other, thereby reducing the risk of fire, explosion, etc. caused by the protective cover falling off, and greatly improving the safety performance of the battery pack.

[0012] In this solution, the second buckle can move or elastically deform relative to the second body.

[0013] In this solution, the third buckle can move or elastically deform relative to the second body.

[0014] In this solution, the protective cover further includes a first limiting wall and a second limiting wall arranged at intervals along the width direction of the battery pack, and the second body further includes a third retaining wall arranged along the width direction of the battery pack;

[0015] Wherein, the first limiting wall and the second buckle are located on both sides of the first retaining wall, and the first limiting wall abuts against the first retaining wall, and the second limiting wall abuts against the third retaining wall.

[0016] In this embodiment, the protective cover also includes a third limiting wall arranged along the length direction of the battery pack, the third buckle is arranged on the third limiting wall, the first limiting wall and the second limiting wall are both abutted against the second retaining wall, and the third limiting wall abuts against the second retaining wall.

[0017] In this solution, the first output pole seat assembly also includes a fastening pin, the protective cover includes a first through hole, the second body includes a second through hole, the first through hole is arranged on the first limiting wall and the second limiting wall, the second through hole is arranged on the first retaining wall and the third retaining wall, and the fastening pin enables the protective cover and the second body to be detachably connected through the first through hole and the second through hole.

[0018] In this solution, the fastening pin includes a fixing portion and two deformation portions. Along the width direction of the battery pack, the fixing portion can abut against the second body, and the deformation portion can be elastically deformed so that the elastically deformed deformation portion cannot detach from the first through hole and the second through hole.

[0019] In this solution, the first output terminal block assembly further includes a first body for fixing the connector. The first body includes a plate body and at least two first partitions spaced apart from each other. The first partitions protrude from the plate body in the length direction of the battery pack, and there is at least one cavity between the plate body and the first partitions;

[0020] 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. The fixing member is a protruding post extending in the height direction of the battery pack, and the printed circuit board and the first body are riveted through the fixing member; or, the fixing member is a screw, and the printed circuit board and the first body are threadedly connected through the fixing member. The first body has an avoidance space, and the screw can extend into the avoidance space;

[0021] The end plate includes an avoidance portion recessed downward in the height direction of the battery pack. A limit fitting groove is provided in the avoidance portion. The first body further includes a fitting portion. The first body is installed in the avoidance portion. The fitting portion is located in the limit fitting groove, and the bottom wall of the limit fitting groove in the length direction of the battery pack is used to limit the fitting portion from disengaging from the limit fitting groove;

[0022] The end plate further includes a clamping hole. The first body further includes a first buckle. The first buckle is in clamping fit with the clamping hole. The inner wall of the clamping hole has a first inclined surface, and the first buckle has a second inclined surface. During the process of the first buckle being clamped with the clamping hole, the first inclined surface and the second inclined surface are in sliding fit.

[0023] In this solution, the battery pack further includes at least one second output terminal block assembly. The second output terminal block assembly includes a first body;

[0024] The first body of the first output terminal block assembly is integrally formed with the second body;

[0025] Or, the first output terminal block assembly includes a mounting plate and at least two first bodies. Along the width direction of the battery pack, adjacent first bodies are connected through the mounting plate;

[0026] The first body, the second body and the mounting plate are integrally formed.

[0027] In a second aspect of the present application, a energy storage box is provided. The energy storage box includes an inverter, a battery management system and at least one battery pack, wherein the battery pack is the battery pack described above.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. Brief Description of the Drawings

[0029] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Structural schematic diagram of the energy storage box provided by the present application in a specific embodiment;

[0031] Figure 2 Structural schematic diagram of the battery pack provided by the present application in a specific embodiment;

[0032] Figure 3 Structural schematic diagram of the battery module provided by the present application in a specific embodiment;

[0033] Figure 4 is Figure 3 Partial enlarged view of part A in;

[0034] Figure 5 Structural schematic diagram of the end plate, the first output pole seat assembly and the second output pole seat assembly provided by the present application in a specific embodiment;

[0035] Figure 6 Structural schematic diagram of the end plate and the first output pole seat assembly provided by the present application in a specific embodiment;

[0036] Figure 7 Structural schematic diagram of the end plate provided by the present application in a specific embodiment;

[0037] Figure 8 Structural schematic diagram of the first output pole seat assembly provided by the present application in a specific embodiment;

[0038] Figure 9 Structural schematic diagram of the first output pole seat assembly provided by the present application in another perspective in a specific embodiment;

[0039] Figure 10 is Figure 8 front view of;

[0040] Figure 11 Structural schematic diagram of the first output pole seat assembly provided by the present application in another specific embodiment;

[0041] Figure 12 is Figure 11 rear view of;

[0042] Figure 13Schematic diagram of the second output terminal block assembly provided in this application in a specific embodiment;

[0043] Figure 14 is Figure 5 partial sectional view of A-A in;

[0044] Figure 15 is Figure 14 local enlarged view of part B in;

[0045] Figure 16 is Figure 10 sectional view of B-B in;

[0046] Figure 17 is Figure 10 sectional view of C-C in;

[0047] Figure 18 Exploded view of the first output terminal block assembly provided in this application in a specific embodiment;

[0048] Figure 19 is Figure 11 sectional view of D-D in;

[0049] Figure 20 Schematic diagram of the protective cover provided in this application in a specific embodiment;

[0050] Figure 21 Partial schematic diagram of the first output terminal block assembly provided in this application in a specific embodiment;

[0051] Figure 22 Partial schematic diagram of the fastening pin provided in this application in a specific embodiment.

[0052] Explanation of reference numerals:

[0053] 1 - Battery pack;

[0054] 11 - Battery module;

[0055] 111 - End plate;

[0056] 1111 - Avoidance part;

[0057] 1111a - Limit mating groove;

[0058] 1112 - Clamping hole;

[0059] 1112a - First inclined surface;

[0060] 112 - Electrical connection row;

[0061] 114 - Connector;

[0062] 1141 - Male end;

[0063] 1142 - Female terminal;

[0064] 1142a - Mounting part;

[0065] 115 - Printed circuit board;

[0066] 1151 - Fixing hole;

[0067] 2 - First output terminal block assembly;

[0068] 21 - First body;

[0069] 211 - Plate body;

[0070] 212 - First partition;

[0071] 213 - Second partition;

[0072] 214 - Third partition;

[0073] 215 - Fixing piece;

[0074] 216 - Avoidance space;

[0075] 217 - Fitting part;

[0076] 218 - First buckle;

[0077] 2181 - Second inclined surface;

[0078] 219 - Cavity;

[0079] 2191 - First cavity;

[0080] 2192 - Second cavity;

[0081] 22 - Second body;

[0082] 221 - First retaining wall;

[0083] 2211 - First card slot;

[0084] 222 - Second retaining wall;

[0085] 2221 - Second card slot;

[0086] 223 - Second through hole;

[0087] 224 - Mounting seat;

[0088] 225 - Third retaining wall;

[0089] 23 - Protective cover;

[0090] 231 - First limiting wall;

[0091] 232 - Second buckle;

[0092] 233 - Second limiting wall;

[0093] 234 - Third limiting wall;

[0094] 2341 - Third buckle;

[0095] 235 - First through hole;

[0096] 236 - Extension part;

[0097] 24 - Fastening pin;

[0098] 241 - Deformation part;

[0099] 242 - Fixing part;

[0100] 25 - Mounting plate;

[0101] 3 - Second output pole seat assembly;

[0102] 4 - Opening part;

[0103] 5 - Nickel sheet. Detailed implementation manners

[0104] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0105] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0106] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0107] It should be understood that the term " / and / " used herein is only a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0108] The battery pack 1 provided by this application can be used in an energy storage box. Please refer to Figure 1, the energy storage box includes a cabinet body, an inverter, and at least one battery pack 1. The cabinet body 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 advantages such as high conversion efficiency, fast startup speed, and high safety, and can also have functions such as short-circuit, overload, over / under voltage, and over-temperature protection.

[0109] In some large energy storage boxes, a battery management system can also be included. The battery management system is used to make the battery pack 1 work within a safe operating range, and can control the charge and discharge power of the battery pack 1 according to factors such as ambient temperature, battery state, and power consumption requirements, improving the safety of the battery pack 1 and making the operating state of the battery pack 1 more reasonable, thus being beneficial to improving the endurance and service life of the battery pack 1.

[0110] Please refer to Figure 2 , the 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. Among them, 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 receiving space for the battery module 11, and the box body can adopt various structures.

[0111] In some embodiments, the box body can 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 fixing parts such as bolts. The upper box cover and the bottom cover enclose a receiving space for accommodating the battery module 11. The box body can be of various shapes, such as a cylinder, a cuboid, etc.

[0112] A seal can also be provided between the upper box cover and the bottom cover for sealing the receiving space.

[0113] In the battery pack 1, the battery module 11 includes a plurality of battery cells. The battery cells can be secondary batteries. The plurality of battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the plurality of battery cells. In some embodiments, the plurality of battery cells can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the plurality of battery cells is accommodated in the box body. The plurality of battery cells can be arranged side by side along the length direction X of the battery pack 1, or can also be arranged side by side along the width direction Y of the battery pack 1.

[0114] In other embodiments, multiple battery cells may first be connected in series, parallel, or in a hybrid connection to form a battery module 11, and then multiple battery modules 11 are connected in series, parallel, or in a hybrid connection to form an integral unit and are housed in a box. Among them, the battery module 11 includes a frame structure, which may include end plates 111, side plates, a top plate, and a bottom plate that are connected to each other. Multiple battery cells are located in the inner cavity of the frame structure and are stacked on top of each other 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.

[0115] In addition, the battery pack 1 may further include other structures, such as a busbar component, for realizing electrical connection between multiple battery cells.

[0116] Among them, the battery cell may be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0117] In addition, the battery cell includes a housing, a top cover, a bare battery core, and other functional components.

[0118] In some embodiments, the housing and the top cover may be separate components. The housing has an opening, and the top cover is closed at the opening of the housing to isolate the internal environment of the battery cell from the external environment. The internal environment surrounded by the housing and the top cover can be used to accommodate the bare battery core, the electrolyte, and other components. In other embodiments, the top cover and the housing may also be integrated. Specifically, the top cover and the housing may first form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing, the top cover is then closed on the housing.

[0119] The housing may be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the bare battery core. The material of the housing can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this.

[0120] Embodiments of the present application provide a battery pack 1, as Figures 2 - 4 shown, the battery pack 1 includes a battery module 11, a connector 114, and a first output terminal assembly 2. The battery module 11 includes an end plate 111, an electrical connection row 112, and multiple battery cells. The multiple 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 terminal assembly 2 includes a first body 21 for fixing the connector 114 and a second body 22 for fixing the electrical connection row 112. As Figure 8 and Figure 11As shown in the figure, the first body 21 includes a plate body 211 and at least two first partition plates 212 arranged at intervals. The first partition plates 212 protrude from 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 plates 212.

[0121] It should be noted that, as Figure 3 shown in the figure, the length direction of the battery pack can be the X direction in the figure, the width direction of the battery pack can be the Y direction in the figure, and the height direction of the battery pack can be the Z direction in the figure.

[0122] The following takes Figure 8 the current flow direction of the first output terminal seat assembly 2 in the shown embodiment for specific description.

[0123] Specifically, as Figure 10 , Figure 16 and Figure 17 shown in the figure, along the height direction Z of the battery pack 1, the plate body 211 and the first partition plates 212 of the first body 21 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 electricity, taking the current flowing along the height direction Z of the battery pack 1 to the end plate 111 as an example, the current flows through the first partition plate 212 into the first cavity 2191. The current flows around in the first cavity 2191 (flows from the side wall of the first cavity 2191 to the surface of the plate body 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 plate 212. Furthermore, the current can flow into the second cavity 2192 and flow around (flows from the side wall of the second cavity 2192 to the surface of the plate body 211 located in the second cavity 2192, and then flows to the next side wall of the second cavity 2192), so as to increase the path of the current creeping along the length direction X of the battery pack 1, that is, it is beneficial to increase the creepage distance and greatly reduce the risk of creepage between the connector 114 and the end plate 111, thereby reducing the risk of creepage between live metal parts.

[0124] Therefore, when an electrical fault occurs in the battery pack 1, such as leakage, through at least one cavity 219 enclosed between the plate body 211 and the first partition plates 212, the current can flow around through the cavity 219, that is, even if the current needs to cross the first partition plate 212 to flow to the live metal part, and then it can increase the creepage distance, so that the current between two live metal parts cannot reach in a straight path, so as to reduce the risk of creepage between the connector 114 and the end plate 111 and other metal parts, reduce the risk of potential safety hazards, and further be beneficial to improving the electrical safety performance of the battery pack 1 and ensuring the safety of the battery pack 1 during use.

[0125] Similarly, as Figure 11In the illustrated embodiment, there is also at least one cavity 219 between the plate body 211 and the first partition 212 in this embodiment, and the current can also flow around within this cavity 219, that is, the current needs to cross over the first partition 212 to flow towards the charged metal components, which is the same as the principle of the current flowing around within the cavity 219 in the above Figure 8 embodiment, so it will not be elaborated here.

[0126] Among them, the end plate 111 can be made of a metal material such as aluminum alloy, and the material of the first output terminal block assembly 2 can be plastic materials such as polypropylene (PP), polybutylene terephthalate + glass fiber (PBT+GF), acrylonitrile-butadiene-styrene terpolymer (ABS), etc. That is, the first output terminal block assembly 2 is an insulating material. The cavity 219 formed by the plate body 211 and the first partition 212 provided through the first body 21 is beneficial to enhancing the insulation protection between the electrical connection row 112, the connector 114 and the charged metal components such as the end plate 111.

[0127] In addition, as Figure 9 and Figure 12 shown, a plurality of the above-mentioned cavities 219 can also be formed on the back surface of the first output terminal block assembly 2, which is beneficial to further reducing the risk of creepage between the charged metal components and improving the use safety.

[0128] In addition, the first body 21 and the second body 22 in the first output terminal block assembly 2 are integrally formed. Compared with the split design of the first body 21 and the second body 22, it is beneficial to reduce the number of parts and the processes of separately installing the first body 21 and the second body 22 respectively, thereby improving the assembly efficiency and reducing the assembly cost.

[0129] In a possible implementation manner, as Figure 8 and Figure 11 shown, the first partition 212 is perpendicular to the height direction Z of the battery pack 1, which is convenient for processing and is beneficial to improving the structural strength of the first body 21.

[0130] In a possible implementation manner, as Figure 8 and Figure 16 shown, the first body 21 further includes at least two second partitions 213 arranged at intervals. The second partitions 213 connect adjacent first partitions 212. 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 partitions 212, and 5mm ≤ L ≤ 10mm. In some embodiments, the first distance L can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0131] 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.

[0132] At the same time, if Figure 10 and Figure 16 , Figure 17 As 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.

[0133] 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.

[0134] 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.

[0135] In a possible implementation, as Figure 8 shown, a second partition 213 and a third partition 214 arranged in parallel along the height direction Z of the battery pack 1 are provided on the top of the first body 21.

[0136] In this embodiment, the third partition 214 can be used for the 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 component (such as the current needs to cross the third partition 214 to flow from the connector 114 to the end plate 111). 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 substantially in a mesh structure to increase the creepage distance and further improve the use 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 beneficial to improving the strength of the third partition 214, and makes the top of the first body 21 substantially in a mesh structure, which is beneficial to further improving the structural strength of the first body 21.

[0137] In a possible implementation, the second partition 213 on the top of the first body 21 can also be used for the 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 on the top of the first body 21 to flow to the charged metal component (such as the current needs to cross the second partition 213 on 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 current that creeps between the charged metal components connected to the first output pole seat assembly 2 cannot reach in a straight path, reducing the risk of creepage and improving the electrical safety performance of the battery pack 1.

[0138] Wherein, as Figure 4 shown, the top of the first body 21 further includes an opening 4. 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. The female end 1142 is provided with a mounting portion 1142a, and the mounting portion 1142a protrudes relative to the female end 1142. The mounting portion 1142a can be elastically deformed so that the female end 1142 is snap-fitted with the male end 1141. 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, improving the convenience of connecting the male end 1141 and the female end 1142 and facilitating assembly.

[0139] In addition, in a possible implementation, the bottom wall of the opening 4 may be inclined downward along the height direction Z of the battery pack 1, so as to provide a larger operating space for personnel along the height direction Z of the battery pack 1, facilitating the elastic deformation of the driving mounting portion 1142a.

[0140] In a possible implementation, as Figure 4 and Figure 8 shown, the battery pack 1 further includes a printed circuit board 115 (Printed Circuit Board - PCB) fixedly connected to the connector 114. 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.

[0141] In this embodiment, the connector 114 and the printed circuit board 115 are connected by soldering. 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, enabling the printed circuit board 115 to collect signals such as temperature and voltage during the operation of the battery cells and output the collected signals through the connector 114, which is beneficial to improving the working performance of the battery pack 1.

[0142] In addition, as Figure 4 shown, the electrical connection row 112 is electrically connected to the printed circuit board 115 through a nickel sheet 5.

[0143] In a possible implementation, as Figure 4 , Figure 8 and Figure 11 shown, the fixing member 215 is a convex 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 through the fixing member 215; alternatively, the fixing member 215 is a screw, and the printed circuit board 115 and the first body 21 are threadedly connected through the fixing member 215. The first body 21 has an avoidance space 216, and the screw can extend into the avoidance space 216.

[0144] In an embodiment, when the fixing member 215 is a screw (not shown in the figure), the first body 21 and the printed circuit board 115 are detachably connected, so that the connector 114 and the first output terminal seat assembly 2 are detachably connected, facilitating the replacement and repair of the first output terminal seat assembly 2 and the connector 114. At the same time, the avoidance space 216 is used to avoid the screw, enabling the screw to extend into the avoidance space 216 during the threaded connection process, improving the feasibility of the threaded connection between the first body 21 and the printed circuit board 115, and thus improving the feasibility of the connection between the first output terminal seat assembly 2 and the connector 114.

[0145] In another embodiment, when the fixing member 215 is a protruding post, during the connection of the connector 114 to the first body 21 via the printed circuit board 115, the protruding post extends into the fixing hole 1151. Subsequently, the end of the protruding post is hot riveted so that the end of the hot-riveted protruding post forms a mushroom-like structure, making the diameter of the end of the hot-riveted protruding post larger than the diameter of the fixing hole 1151, preventing the protruding post from detaching through the fixing hole 1151, thereby relatively fixing the connector 114 and the first body 21. By connecting in a riveting manner, there is no need to introduce additional components, reducing the number of components and facilitating operation.

[0146] In a possible implementation, as Figure 7 Figure 8 and Figure 14 shown, the end plate 111 includes an avoidance portion 1111 that is recessed downward along the height direction Z of the battery pack 1. A limiting and mating groove 1111a is provided in the avoidance portion 1111. The first body 21 further includes a mating portion 217. The first body 21 is installed in the avoidance portion 1111, the mating portion 217 is located in the limiting and mating groove 1111a, and the bottom wall of the limiting and mating groove 1111a along the length direction X of the battery pack 1 is used to limit the mating portion 217 from detaching from the limiting and mating groove 1111a.

[0147] In this embodiment, the first body 21 can be located within the avoidance portion 1111, and the side wall of the avoidance portion 1111 can limit the first body 21 from moving relative to the end plate 111 along the width direction Y of the battery pack 1. Meanwhile, along the length direction X of the battery pack 1, the mating portion 217 can extend into the limiting and mating groove 1111a and engage with each other, so that the limiting and mating groove 1111a can limit the first body 21 from moving relative to the end plate 111 along the width direction Y and the height direction Z of the battery pack 1, and the bottom wall of the limiting and mating groove 1111a can be used to limit the first body 21 from moving away from the battery cell along the length direction X of the battery pack 1, 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 terminal seat assembly 2 and the end plate 111, which is beneficial to improving the reliability and stability of the connection between the first output terminal seat assembly 2 and the end plate 111. Additionally, the limiting and mating groove 1111a is located within the avoidance portion 1111. Compared with the limiting and mating groove 1111a being provided at other positions on the end plate 111, it is beneficial to reduce the volume of the end plate 111 along the length direction X of the battery pack 1, so that the surface of the first body 21 can be flush with the surface of the end plate 111 along the length direction X of the battery pack 1, improving the overall aesthetics of the battery pack 1.

[0148] In a possible implementation, as Figure 15As shown, the end plate 111 further includes a clamping hole, and the first body 21 further includes a first buckle 218. The first buckle 218 is in clamping fit with the clamping hole 1112. The inner wall of the clamping hole 1112 has a first inclined surface 1112a, and the first buckle 218 has a second inclined surface 2181. During the process of the first buckle 218 being clamped with the clamping hole 1112, the first inclined surface 1112a and the second inclined surface 2181 are in sliding fit.

[0149] In this embodiment, the first buckle 218 can be a hook structure. The clamping fit between the first buckle 218 and the clamping hole 1112 can limit the relative movement of the first body 21 with respect 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 terminal seat assembly 2 and the end plate 111. At the same time, during the connection process of the first body 21 and the end plate 111, the sliding fit between the first inclined surface 1112a and the second inclined surface 2181 can guide the clamping of the first buckle 218 and the clamping hole 1112, and the smoothness of the connection between the first body 21 and the end plate 111 for connection.

[0150] In some embodiments, as Figure 7 shown, along the width direction Y of the battery pack 1, two limiting fit grooves 1111a are arranged in one avoidance portion 1111, and a clamping hole 1112 is arranged between the two limiting fit grooves 1111a. As Figure 8 and Figure 14 shown, along the width direction Y of the battery pack 1, the first body 21 is provided with two fitting portions 217 at intervals, and a first buckle 218 is arranged between the two fitting portions 217. Along the width direction Y of the battery pack 1, the side walls of the two fitting portions 217 away from the first buckle 218 are in contact with the limiting fit grooves, and the side walls of the two fitting portions 217 close to the first buckle 218 are not in contact with the limiting fit grooves, which is beneficial to reducing tolerances, facilitating production and processing, and reducing the difficulty of clamping the first body 21 and the end plate 111 for easy assembly.

[0151] In a possible implementation manner, as Figure 8 and Figure 10 shown, the second body 22 includes a mounting seat 224 for fixing the electrical connection row 112. The first output terminal seat assembly 2 further includes a protective cover 23. The protective cover 23 is detachably connected to the second body 22. Along the height direction Z of the battery pack 1, there is a safety gap H between the protective cover 23 and the second body 22.

[0152] In this embodiment, the electrical connection row 112 is fixed to the mounting base 224 by screws, and the protective cover 23 can cover the electrical connection row 112, which is beneficial to improving the protection effect. At the same time, the protective cover 23 has an extension 236 extending along the height direction Z of the battery pack 1, so that there is a minimum safety gap H between the extension 236 and the second body 22, preventing the operator from accidentally touching the electrical connection row 112 located between the protective cover 23 and the second body 22, and improving the use safety of the battery pack 1.

[0153] In addition, as Figure 8 shown, a plurality of partitions are also provided on the top of the second body 22, so that the top of the second body 22 is generally in a mesh structure, increasing the creepage distance. The principle is the same as the above-mentioned creepage principle and will not be elaborated here. At the same time, the structural strength of the second body 22 can also be improved.

[0154] Among them, the material of the electrical connection row 112 can be aluminum alloy, red copper alloy, nickel alloy or a coating of alloy material.

[0155] In a possible implementation manner, as Figure 12 and Figures 19 - 21 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 card slot 2211, and the second retaining wall 222 is provided with a second card slot 2221. The first card slot 2211 is in snap-fit connection with the second buckle 232, and the second card slot 2221 is in snap-fit connection with the third buckle 2341. Among them, the second buckle 232 can move relative to the second body 22 or elastically deform to disconnect the protective cover 23 from the second body 22.

[0156] In this embodiment, the second buckle 232 protrudes along the width direction Y of the battery pack 1, and the third buckle 2341 protrudes along the length direction X of the battery pack 1, that is, the second buckle 232 and the third buckle 2341 are asymmetrically arranged on the protective cover 23. When the protective cover 23 is connected to the second body 22, the first card slot 2211 is in snap-fit connection with the second buckle 232, and the second card slot 2221 is in snap-fit connection with the third buckle 2341 to prevent the protective cover 23 and the second body 22 from separating from each other along the height direction Z of the battery pack 1.

[0157] Therefore, the second buckle 232 and the third buckle 2341 are asymmetrically arranged on the protective cover 23, so that the protruding directions of the second buckle 232 and the third buckle 2341 are different, so that the direction of the force driving the second buckle 232 to disengage from the first card slot 2211 is different from the direction of the force driving the third buckle 2341 to disengage from the second card slot 2221. When the battery pack 1 vibrates, since the vibration direction of the battery pack 1 is often the same, the second buckle 232 and the third buckle 2341 cannot be disengaged from the second body 22 at the same time during vibration, so that the risk of the protective cover 23 and the second body 22 separating from each other can be greatly reduced, thereby reducing the risks such as fire and explosion caused by the protective cover 23 falling off, and greatly improving the use safety performance of the battery pack 1.

[0158] In a possible implementation manner, as Figure 12 and Figures 19 - 21 shown, the protective cover 23 further includes a first limiting wall 231 and a second limiting wall 233 that are arranged at intervals along the width direction Y of the battery pack 1, and a third limiting wall 234 that is arranged along the length direction X of the battery pack 1. The second body 22 further includes a third retaining wall 225 that is arranged along the width direction Y of the battery pack 1;

[0159] Wherein, 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, 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 both the first limiting wall 231 and the second limiting wall 233 abut against the second retaining wall 222.

[0160] In this embodiment, when the protective cover 23 is clamped with the second body 22, along the width direction Y of the battery pack 1, the first limiting wall 231 abuts against the first retaining wall 221, and the second limiting wall 233 abuts against the third retaining wall 225 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, both the first limiting wall 231 and the second limiting wall 233 abut against the second retaining wall 222, and the third limiting wall 234 abuts against the second retaining wall 222 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.

[0161] 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.

[0162] In summary, through the snap - fit cooperation of the second buckle 232 and the third buckle 2341 with the corresponding first card slot 2211 and the second card slot 2221, and the abutment of each limiting wall against each corresponding retaining wall, the protection cover 23 is restricted from separating from the second body 22 along the length direction X, width direction Y, and height direction Z of the battery pack 1, greatly increasing the firmness between the protection cover 23 and the second body 22, thereby greatly reducing the risk that the protection cover 23 and the second body 22 become loose from each other due to the vibration of the battery pack 1.

[0163] 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, there is a possibility that the second buckle 232 may be disengaged from the first card slot 2211. Even if the second buckle 232 is disengaged from the first card slot 2211, under the cooperation of the third buckle and the second card slot 2221, and the action of the abutment of each limiting wall against each corresponding retaining wall, the protection 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, so that the protection cover 23 still cannot be disconnected from the second body 22, thereby improving the firmness of the connection between the protection cover 23 and the second body 22 and enabling the first output terminal seat assembly 2 to have good anti - vibration performance.

[0164] When it is necessary to remove the protection cover 23 from the second cover body, drive the second buckle 232 to move or elastically deform (such as lifting 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 plane formed by the width direction Y and height direction Z of the battery pack 1, thereby disengaging the second buckle 232 from the first card slot 2211, and then making the protection cover 23 tilt relative to the second body 22, so that the protection cover 23 can be disconnected from the second body 22. Using the above - mentioned disassembly method of driving the buckle on the side of the protection cover 23 to move or deform is beneficial to reducing the risk of damaging the structures of the protection cover 23 and the second body 22 and is beneficial to reducing the disassembly, installation, and maintenance costs.

[0165] In addition, the third buckle 2341 can also move or elastically deform relative to the second body 22 to facilitate the connection and disconnection between the protection cover 23 and the second body 22.

[0166] In another possible implementation manner, as Figure 18 and Figure 22 shown, the first output terminal seat assembly further includes a fastening pin 24. The protection cover 23 includes a first through - hole 235, and the second body 22 includes a second through - hole 223. The fastening pin 24 passes through the first through - hole 235 and the second through - hole 223 to detachably connect the protection cover 23 and the second body 22.

[0167] In this embodiment, as Figure 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, Figure 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.

[0168] In addition, the fastening pin 24 in this embodiment can also be used in Figure 19 In the illustrated embodiment, the first through hole 235 is provided on the first limiting wall 231 and the second limiting wall 233 , and the second through hole 223 is provided on the first retaining wall 221 and the third retaining wall 225 , thereby further improving the stability of the connection between the protective cover 23 and the second body 22 .

[0169] In a possible implementation, Figure 5 and Figure 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.

[0170] In this embodiment, if Figure 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.

[0171] In a possible implementation, as Figure 6 and Figure 11 shown, the first output pole seat assembly includes a mounting plate 25 and at least two first bodies 21. Along the width direction Y of the battery pack 1, adjacent first bodies 21 are connected by the mounting plate 25. Among them, the first body 21, the second body 22, and the mounting plate 25 are integrally formed.

[0172] In this embodiment, at least two first bodies 21 are all used to fix the connector 114. The mounting plate 25 is provided with a first buckle 218, and at least one clamping hole 1112 that is clamped and matched with the first buckle 218 of the mounting plate 25 is provided on the end plate 111, which is beneficial to reducing the processing steps of the first output pole seat assembly 2 and reducing the production cost. At the same time, the first body 21, the second body 22, and the mounting plate 25 are integrally formed. Compared with the independent setting of each first body 21 and between the first body 21 and the second body 22, the process of multiple assemblies is reduced, and the efficiency is improved. At the same time, the integrally formed first output pole seat assembly 2 has relatively high structural stability, and can reduce the risk of individual components detaching from the end plate 111, and improve the stability of the first output pole seat assembly 2 installed on the end plate 111.

[0173] The embodiment of the present application also provides an energy storage box, as Figure 1 shown, the energy storage box includes an inverter, a battery management system, and at least one battery pack 1, where the battery pack 1 is the battery pack 1 in any of the above embodiments.

[0174] When the battery pack 1 is used in the energy storage box, there is at least one cavity 219 between the plate body 211 of the first output pole seat assembly 2 of the battery pack 1 and the first partition 212, so that the current can flow around through the cavity 219, that is, even if the current needs to cross the first partition 212 to flow to the charged metal component, and then the creepage distance can be increased, so that the current that creeps between two charged metal components cannot reach in a straight line path, so as to reduce the risk of creepage between the connector 114 and metal components such as the end plate 111, and reduce the risk of generating potential safety hazards, and thus is beneficial to improving the electrical safety performance of the energy storage box.

[0175] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within 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 base assembly (2), the first output pole base assembly (2) comprising a second body (22) for fixing the electrical connection row (112); 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) 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), wherein the second buckle (232) protrudes along the width direction (Y) of the battery pack (1), and the third buckle (2341) protrudes along the length direction (X) of the battery pack (1); The second body (22) comprises 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 card slot (2211); the second retaining wall (222) is provided with a second card slot (2221); the first card slot (2211) is engaged with the second buckle (232); and the second card slot (2221) is engaged with the third buckle (2341).

2. The battery pack according to claim 1, characterized in that: The second buckle (232) is capable of moving or elastically deforming relative to the second body (22).

3. The battery pack according to claim 2, characterized in that: The third buckle (2341) is capable of moving or elastically deforming relative to the second body (22).

4. The battery pack according to claim 1, 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); the second body (22) further comprises a third retaining wall (225) arranged along the width direction (Y) of the battery pack (1); 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), and the second limiting wall (233) abuts against the third retaining wall (225).

5. The battery pack according to claim 4, characterized in that: The protective cover (23) further comprises a third limiting wall (234) arranged along the length direction (X) 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 limiting wall (233) are both in contact with the second retaining wall (222); and the third limiting wall (234) is in contact with the second retaining wall (222).

6. The battery pack according to claim 4, characterized in that: The first output pole seat assembly (2) further comprises a fastening pin (24), the protective cover (23) comprises a first through hole (235), the second body (22) comprises a second through hole (223), the first through hole (235) is arranged on the first limiting wall (231) and the second limiting wall (233), the second through hole (223) is arranged on the first retaining wall (221) and the third retaining wall (225), and the fastening pin (24) enables the protective cover (23) and the second body (22) to be detachably connected via the first through hole (235) and the second through hole (223).

7. The battery pack according to claim 6, characterized in that: The fastening pin (24) includes a fixing portion (242) and two deformation portions (241). Along the width direction (Y) of the battery pack (1), the fixing portion (242) can abut against the second body (22), and the deformation portion (241) can be elastically deformed so that the elastically deformed deformation portion (241) cannot be separated from the first through hole (235) and the second through hole (223).

8. The battery pack according to any one of claims 1 to 7, characterized in that: The first output pole seat assembly (2) further comprises a first body (21) for fixing the connector (114), the first body (21) comprising a plate body (211) and at least two first partitions (212) arranged at intervals, the first partitions (212) protruding relative to the plate body (211) along a length direction (X) of the battery pack (1), and at least one cavity being 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) is a protruding column extending along a height direction (Z) of the battery pack (1); the printed circuit board (115) and the first body (21) are riveted via the fixing member (215); or the fixing member (215) is a screw; the printed circuit board (115) and the first body (21) are threadedly connected via the fixing member (215); the first body (21) has an escape space (216); the screw can extend into the escape space (216); The end plate (111) comprises an avoidance portion (1111) which is recessed downwardly along the height direction (Z) of the battery pack (1), a limited matching groove (1111a) being arranged in the avoidance portion (1111), the first body (21) further comprises a matching portion (217), the first body (21) is mounted on the avoidance portion (1111), 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 being separated from the limited matching groove (1111a); The end plate (111) also includes a snap-fitting hole (1112), and the first body (21) also includes a first snap-fitting (218), the first snap-fitting (218) is snap-fitted with the snap-fitting hole (1112), the inner wall of the snap-fitting hole (1112) has a first inclined surface (1112a), and the first snap-fitting (218) has 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 matched.

9. The battery pack according to any one of claims 1 to 7, 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 a 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 along the width direction (Y) of the battery pack (1), adjacent first bodies (21) are connected via the mounting plate (25); 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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