Battery pack module and battery pack module group

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a battery pack module and a battery pack module group. The battery pack module comprises a plurality of battery cell boxes, at least one battery cell is placed in each battery cell box, the battery cell boxes are arranged side by side in the left-right direction, the largest-area faces of the battery cells are opposite in the left-right direction, and tabs of the battery cells extend out of the open ends of the front ends of the battery cell boxes respectively. The battery cell boxes are respectively connected to the rear end of the support module, the tabs of the battery cells respectively extend out of the tab hole slots of the support module, the plurality of bus plates are arranged on the front end surface of the support module, the bus plates are respectively positioned on the tab hole slots, the tail ends of the tabs are respectively welded on the bus plates, and the bus plates are electrically connected with the battery cells.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack module and a battery pack module. Background Art

[0002] As batteries are increasingly used, especially lithium-ion batteries, more and more devices are using lithium-ion batteries, and the use environment is becoming more and more complex and diverse. As the application of lithium-ion batteries is widely promoted, market competition is becoming more and more fierce, and the production cost, assembly, and maintenance flexibility requirements of lithium-ion battery packs are becoming higher and higher in the manufacturing and repair and maintenance of battery packs during use.

[0003] The inventors found during the research process of the present invention that the current lithium-ion battery packs are mainly composed of battery cells, which are wrapped into groups with tape or connected into groups by screws. The existing technology has the risk of battery cells being easily loosened or falling off; and the assembly of the existing technology is mainly manual operation, which cannot ensure the consistency of the product and has the defect of low production efficiency. It is also not conducive to the repair and maintenance of the battery pack, which limits the application of lithium-ion batteries. Summary of the invention

[0004] One of the purposes of the embodiments of the present utility model is to provide a battery pack module and a battery pack module. The application of this technical solution is conducive to improving the neatness of battery pack assembly and improving the assembly consistency of the battery pack.

[0005] In a first aspect, an embodiment of the present invention provides a battery pack module, comprising:

[0006] A plurality of battery cell boxes, each of which contains at least one battery cell, the battery cell boxes are arranged side by side, the largest surfaces of the battery cells are opposite to each other, and the tabs of the battery cells extend from the front open end of the battery cell boxes;

[0007] A bracket module, each of the battery boxes is respectively connected to the rear end of the bracket module, the pole ears of each of the battery cells extend out from the pole ear holes of the bracket module, and a plurality of busbars are installed on the front end surface of the bracket module, each of the busbars is respectively located on the pole ear holes, the ends of each of the pole ears are respectively welded to each of the busbars, and each of the busbars is electrically connected to each of the battery cells.

[0008] Optionally, a plurality of card slots are further provided at the rear end of the bracket module, and at least one slot width of each of the card slots is narrower than the thickness of the box wall of the battery box;

[0009] At least one location of the box wall at the open end of each of the battery box is embedded in a slot, and the slot exerts elastic pressure on the embedded box wall.

[0010] Optionally, the battery box is an aluminum box.

[0011] Optionally, the end of the battery box opposite to the surface with the largest area is also an open end.

[0012] Optionally, in a natural state when not embedded in the box wall, the width of the card slot gradually narrows from the slot opening to the slot bottom.

[0013] Optionally, an insulating strip is provided between the positive electrode tab and the negative electrode tab of any of the battery cells, and the insulating strip is provided on the insulating frame body of the support module.

[0014] Optionally, a buffer layer is provided between any two adjacent battery cells in the same battery cell box and / or between any two adjacent battery boxes.

[0015] Optionally, there is one or more than one battery cell in each of the battery cell boxes.

[0016] Optionally, at the rear end of the insulating frame body of the bracket module, a plurality of limit plates extending backwards are arranged along the outer edge of the frame body, and the outer side surfaces of the battery boxes arranged side by side are limited to the inner sides of the limit plates.

[0017] In a second aspect, the battery pack module provided by the embodiment of the present invention includes a plurality of any of the battery pack modules described above.

[0018] As can be seen from the above, by using this embodiment, the battery box neatly groups and assembles the battery cells, connects multiple battery boxes through a bracket module, and connects multiple battery cells in series and parallel through the pole ear holes and busbars on the bracket module. The battery pack module has high assembly neatness and high consistency, and is easy to assemble and disassemble, which is conducive to improving work efficiency.

[0019] In addition, the left and right opposite sides of the bracket module at the front end of each battery module are respectively provided with a first bracket buckle part and a second bracket buckle part that are opposite to each other. In this way, any two battery modules (referred to as the first battery module and the second battery module) are arranged side by side, and the first bracket buckle part of the first battery module and the second bracket buckle part of the second battery module adjacent to the battery module are buckled in a facing manner, and the two battery modules are connected together to form a large-capacity battery pack. The connection between the electrodes of each battery module can be made by wire connection.

[0020] As can be seen from the above, the battery module of this embodiment has high assembly neatness and good consistency, and is easy to assemble and disassemble, which is conducive to improving work efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute an improper limitation of the present invention.

[0022] Figure 1 A schematic diagram of the exploded structure of the bracket module provided in Embodiments 1 to 3 of the present utility model;

[0023] Figure 2 , 3 The three-dimensional structural diagrams of the front view and rear view of the frame body of the bracket module provided in the first to third embodiments of the present invention are shown respectively;

[0024] Figure 4 , 5 , 6, 7, and 8 are schematic diagrams of the structure of the frame body of the bracket module provided in embodiments 1 to 3 of the present invention, respectively, in front view, rear view, side view, top view, and bottom view;

[0025] Fig. 9 A schematic diagram of the exploded structure of the battery pack module provided in Embodiments 1 to 3 of the present utility model;

[0026] Fig.10 A front structural schematic diagram of a battery pack module provided in Embodiments 1 to 3 of the present utility model;

[0027] Fig.11 for Fig.10 AA cross-sectional structural diagram;

[0028] Fig.12 , 13 14 and 15 are schematic diagrams of the rear view, side view, top view and bottom view of the battery module provided in Embodiments 1 to 3 of the present invention, respectively;

[0029] Fig.16 A schematic diagram of the three-dimensional structure of the end plate provided in Embodiments 1 to 3 of the present utility model;

[0030] Fig.17 , 18 , 19, 20, and 21 are schematic diagrams of the front view, rear view, side view, top view, and bottom view of the end plate provided in Embodiments 1 to 3 of the present utility model;

[0031] Fig. 22 A schematic diagram of the exploded structure of a lithium-ion battery pack provided in Embodiments 1 to 3 of the present invention;

[0032] Fig.23 A schematic diagram of the three-dimensional structure of the lithium-ion battery pack provided in Embodiments 1 to 3 of the present invention when not covered with an insulating protective cover;

[0033] Fig.24 for Fig.23 Schematic diagram of the main structure;

[0034] Fig.25 A schematic diagram of the three-dimensional structure of the lithium-ion battery pack provided in Embodiments 1 to 3 of the present utility model after being covered with an insulating protective cover plate;

[0035] Fig.26 A schematic diagram of the main structure of the lithium-ion battery pack provided in Embodiments 1 to 3 of the utility model after the insulating protective cover is fixed;

[0036] Fig. 27 for Fig.26 BB cross-sectional structure diagram;

[0037] Fig.28 A schematic diagram of the top view of the lithium-ion battery pack provided in Embodiments 1 to 3 of the present utility model after the insulating protective cover plate is fixed;

[0038] Fig.29 for Fig.28 AA cross-sectional structure schematic diagram.

[0039] Reference numerals

[0040] 1: Bracket module; 101: Pole ear slot; 102: First bracket buckle part; 103: Second bracket buckle part; 104: Slot; 105: Insulation strip; 106: Fixing column; 107: Frame body; 2: Busbar; 21: Pole ear slot; 3: Cell; 31: Pole ear; 4: Cell box; 5: End plate; 51: Lifting part; 52: Bundling slot; 53: Bundling recess; 54: Bottom protective plate fixing hole; 55: Top protective plate fixing part; 6: Bottom protective plate; 61: Hanging plate. 7: Top protective plate; 8: Insulation plate; 9: Insulation protective cover plate; 10: Wire harness; 11: Electrode adapter plate; 12: Conductive adapter block; 13: Protective cover. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0042] Embodiment 1

[0043] See also Figure 1-29 Show.

[0044] The present embodiment provides a support module 1 suitable for modular assembly of a battery pack, which mainly includes a frame body with an insulating surface or made of an insulating material, and a plurality of busbars 2 made of a conductive material. Among them, at least two through-holes 101 of the pole ear holes are dug on the frame body, and a busbar 2 fixing portion for fixing the busbar 2 is provided beside each of the pole ear holes 101. Each busbar 2 is fixed to the front end surface of the frame body, and is respectively located on each of the pole ear holes 101, or fixed beside each of the pole ear holes 101. When located on each of the pole ear holes 101, one side or both sides of the busbar 2 have a gap with the slot wall of the pole ear holes 101 to allow the pole ears to extend out.

[0045] When in use, the bracket module 1 is installed at the end of a battery pack module composed of multiple battery cells 3. The two pole ears 31 of each battery cell 3 can be extended from each pole ear hole groove 101 of the bracket module 1 respectively, and the ends of the extended pole ears are bent at the front end surface of each busbar 2 on or beside the pole ear hole groove 101, and are tightly welded to the front end surface of the busbar 2. Each battery cell 3 is connected in series or in parallel or a combination of series and parallel through each busbar 2.

[0046] As can be seen from the above, the preset tab hole slots 101 on the bracket module 1 of this embodiment can position the two tabs 31 of each battery cell 3, and the tabs between the battery cells 3 are connected together through the busbar 2 located on the tab hole slots 101, thereby realizing the series-parallel connection between the battery cells 3 and the positioning of the tabs. The application of this solution to the assembly of the battery pack module is conducive to improving the flatness of the assembly of the battery pack module, improving the consistency of the battery pack module, and improving the assembly efficiency.

[0047] As an illustration of this embodiment, two matching bracket buckle parts are respectively arranged on at least two opposite sides of the frame body, the bracket buckle part on one side of the frame bracket is referred to as the first bracket buckle part 102, and the bracket buckle part arranged on the other opposite side and facing the first bracket buckle part 102 is referred to as the second bracket buckle part 103, and the first bracket buckle part 102 and the second bracket buckle part 103 have matching structures. For example, one of them is a concave part, and the other is a convex part opposite to the concave part.

[0048] As an illustration of this embodiment, a bracket buckle portion can be provided on both sides of the frame body of the bracket module 1; or multiple bracket buckle portions can be provided on both sides, wherein the bracket buckle portions on the same side can be the same or matched. For example, a first bracket buckle portion 102 and a second bracket buckle portion 103 are provided on the left and right sides of the bracket module 1, respectively, and a plurality of battery cells 3 are connected to form a battery pack module by using the bracket module 1, and then these battery pack modules are arranged in the left and right directions to form a battery pack. At this time, the bracket modules 1 on any two adjacent battery pack modules are opposite to each other, and the two bracket modules 1 opposite to each other are buckled and connected by the first bracket buckle portion 102 and the second bracket buckle portion 103 relative to each other. In principle, multiple battery pack modules are similarly combined with the left and right buckles to form a battery pack as a whole with a larger capacity. Each battery pack module can be electrically connected through a wire.

[0049] As can be seen from the above, the application of the bracket module 1 of this embodiment in the modular assembly of the battery pack is conducive to improving the electrical connection between the cells 3 in the battery pack module, improving the assembly efficiency of the battery pack module, and improving the consistency of the assembly. In addition, the two opposite sides of the bracket module 1 are respectively provided with matching bracket buckle parts, which can further facilitate the further assembly and combination between the battery pack modules, meet different application needs, and improve the assembly flexibility and consistency of the battery pack. During the maintenance of the battery pack, the battery pack module can be flexibly disassembled or added or replaced, which is flexible and convenient to use.

[0050] As an illustration of this embodiment, a slot 104 with a notch facing backwards may be further provided at the rear end of the frame body, wherein at least one of the slot widths of the slot 104 is slightly narrower than the box wall of the cell box 4 for assembling the cell 3 on the battery pack module. When applied to the assembly of the battery pack module, the box wall of the front open end of the cell box 4 is pushed forward from the back to be embedded in the slot 104 located at the rear end of the frame body, so that each cell box 4 is fixedly connected to the rear end of the bracket module 1, and the connection between each cell box 4 and the connection between each cell box 4 and the bracket module 1 is realized, which is conducive to improving the assembly efficiency of the battery pack module, improving the neatness of the assembled battery pack module, and improving the consistency of the battery pack module.

[0051] As an illustration of this embodiment, the width of the slot 104 can be set to be gradually narrowed from the slot mouth to the slot bottom, such as but not limited to being designed to be linearly narrowed, such as but not limited to making the slot 104 an inverted V shape. This design is conducive to facilitating the pushing of the box wall of the battery box 4 into the slot 104, thereby improving the convenience of assembly.

[0052] As an illustration of this embodiment, the wall of the slot 104 at the rear end of the bracket module 1 of this embodiment has a certain elasticity. When the wall of the battery box 4 is pushed into the slot 104 from the rear end, the wall of the slot 104 is elastically deformed, and the wall of the battery box 4 is tightly pressed into the slot 104 to achieve the connection between the bracket module 1 and each battery box 4. When disassembly is required, it is only necessary to pull out the battery box 4 backwards, which is very convenient for disassembly and is conducive to the maintenance of the battery pack.

[0053] As an illustration of this embodiment, the bracket module 1 of this embodiment can be, but is not limited to, made of plastic material using an injection molding process, and the tab hole 101 and the card slot 104 are integrally formed on the frame body.

[0054] As an illustration of this embodiment, a raised insulating strip 105 may be provided between the two-pole ear hole slots 101 of the bracket frame to increase the insulating interval between the positive electrode and the negative electrode of the battery module.

[0055] As an illustration of this embodiment, the tab holes 101 provided on the support module 1 are designed in rows, and each row is provided with two tab holes 101. One of the two tab holes 101 in each row is for the positive tab of a battery cell 3 to extend, and the other is for the negative tab of the battery cell 3 to extend.

[0056] As an illustration of this embodiment, two pole ear slots 101 can be arranged in a row on the bracket module 1. This design is suitable for a battery pack module in which the battery cells 3 are designed in parallel. The positive poles of all the battery cells 3 extend out from one pole ear slot 101, and the negative poles of all the battery cells 3 extend out from another pole ear slot 101.

[0057] As an illustration of this embodiment, at least two rows of tab holes 101 may be provided on the bracket module 1, each row having two tab holes 101. This design can be applied to the series connection of the battery cells 3, the positive electrode of any battery cell 3 and the negative electrode of another adjacent battery cell 3 are located in the same column, the positive electrode of any battery cell 3 and the negative electrode of another adjacent battery cell 3 jointly extend from one of the tab holes 101 in a row, and are jointly connected to the front end surface of the busbar 2 corresponding to the tab hole 101; the negative electrode of the battery cell 3 and the positive electrode of the adjacent battery cell 3 jointly extend from the other tab hole 101 in the row, and are connected together through the busbar 2. By analogy, the series connection between the battery cells 3 is realized to form a battery pack module.

[0058] The series connection and parallel connection between the above battery cells 3 are only application examples of this embodiment and are not limited thereto.

[0059] As an illustration of this embodiment, a tab slot 21 that runs through the front and back can be further designed on the busbar 2 of this embodiment, so that the tab can extend forward from the rear end of the busbar 2 to the front end of the busbar 2. In this way, the tabs of each battery cell 3 can extend not only from the tab hole slot 101 beside the busbar 2, but also from the tab slot 21 in the middle of the busbar 2. When the tabs of more battery cells 3 extend from one tab hole slot 101, the tabs on both sides can extend from both sides of the busbar 2, and the tabs in the middle position can extend from the tab slot 21 in the middle of the busbar 2. Applying this design in this scenario is conducive to reducing the bending degree of the tabs, avoiding damage to the tabs due to excessive bending, and is conducive to improving the flatness of the assembly and the consistency of the assembly.

[0060] As an illustration of this embodiment, a wire harness 10 limiting groove is further provided on the front end face of the frame body of the bracket module 1. The wire harness 10 limiting groove is located between the two-pole ear hole grooves 101 of each row, and a wire harness 10 fixing column 106 protruding from the wire harness 10 limiting groove is also provided on the groove wall of the wire harness 10 limiting groove. With this design, when the battery pack modules are electrically connected by wires, the wire harness 10 composed of these wires can be routed along the wire harness 10 limiting groove, and the polar wire harness 10 limiting groove is used for the wire groove. The wire harness 10 fixing column 106 protruding from the groove wall of the wire harness 10 limiting groove constrains the wire harness 10 in the wire harness 10 limiting groove, improves the flatness of the wiring of the wire harness 10, and improves the consistency of the battery pack.

[0061] As an illustration of this embodiment, at the rear end of the frame body of the bracket module 1, a plurality of limit plates extending backward are arranged along at least two opposite outer edges of the rear end, and the area between the opposite limit plates serves as an accommodating area for the battery box 4 connected to the rear end of the bracket module 1, thereby limiting the position of the battery box 4, improving the assembly efficiency of the battery pack module, and improving the flatness of the assembled battery pack module.

[0062] Embodiment 2

[0063] See also Figure 1-29 Show.

[0064] This embodiment provides a battery pack module, including a plurality of battery cells 3, a plurality of battery cell boxes 4, and a bracket module 1 provided in Embodiment 1.

[0065] A battery cell 3 is placed in each battery cell box 4 , wherein the number of battery cells 3 in each battery cell box 4 may be one or more.

[0066] According to the predetermined series-parallel electrical connection relationship between the battery cells 3, the battery boxes 4 are arranged side by side in sequence on the left and right, with the length*thickness surface of the battery cell 3 facing downward as the gravity-bearing surface of the battery cell 3, the largest surface (length*width) of each battery cell 3 is opposite to each other on the left and right, and the pole ears of each battery cell 3 extend out from the open end of the front end of the battery box 4.

[0067] The bracket module 1 is installed at the front end of the battery boxes 4 that constitute the battery pack module. A plurality of busbars 2 are installed on the front end surface of the bracket module 1. Each busbar 2 is located on or beside each pole ear hole slot 101. Each pole ear extending from the pole ear hole slot 101 is bent, and the end is welded tightly to the busbar 2. In this way, each battery cell 3 is electrically connected together in series or in parallel or in a combination of series and parallel through each busbar 2.

[0068] The specific connection structure can be but not limited to the description of Examples 1 and 3.

[0069] As can be seen from the above, in this embodiment, the battery box 4 neatly groups and assembles the battery cells 3, connects a plurality of battery boxes 4 through a bracket module 1, and connects a plurality of battery cells 3 in series and parallel through the pole ear slots 101 and the busbar 2 on the bracket module 1. The battery pack module has a high degree of neatness and consistency, and is easy to assemble and disassemble, which is conducive to improving work efficiency.

[0070] In addition, the left and right opposite sides of the bracket module 1 at the front end of each battery module are respectively provided with a first bracket buckle portion 102 and a second bracket buckle portion 103 facing each other. In this way, any two battery modules (referred to as the first battery module and the second battery module) are arranged side by side, and the first bracket buckle portion 102 of the first battery module and the second bracket buckle portion 103 of the second battery module adjacent to the battery module are buckled in a facing manner, and the two battery modules are connected together to form a large-capacity battery pack. The connection of the electrodes between the battery modules can be made by wire connection.

[0071] As can be seen from the above, the battery module of this embodiment has high assembly neatness and good consistency, and is easy to assemble and disassemble, which is conducive to improving work efficiency and saving costs.

[0072] A plurality of battery pack modules of this embodiment can be flexibly assembled to form a large-capacity lithium-ion battery pack. For specific assembly methods and structures, please refer to the descriptions of Embodiments 1 and 3.

[0073] The battery box 4 of this embodiment can be, but is not limited to, a sheet metal part made of a metal sheet with good thermal conductivity and light weight, such as an aluminum plate. The front end of the battery box 4 is an open end. Preferably, but not limited to, the right side (or left side) of the battery box 4 is also an open end. The open end of the side is opposite to the largest surface of the battery box 4. The battery cells 3 are placed on their sides in the battery box 4. The outermost battery cell 3 has its largest surface exposed at the lateral open end of the battery box 4. The outermost battery cell 3 is attached to the side of another adjacent battery box 4 (or through a buffer sheet).

[0074] In this embodiment, the battery boxes 4 are used to neatly group the battery cells 3 for assembly, which is beneficial to the assembly positioning of the battery cells 3 , improves the neatness of the assembly of the battery cells 3 , and improves the assembly consistency of the battery module.

[0075] As an illustration of this embodiment, the connection between the bracket module 1 and each battery box 4 can be but not limited to the following:

[0076] In this embodiment, a plurality of slots 104 are provided at the rear end of the frame body of the support module 1, and the number of the slots 104 is equal to or greater than the number of the battery boxes 4. At least one point of the box wall at the front open end of each battery box 4 is respectively limited in at least one slot 104 at the rear end of the support module 1, and the battery box 4 is neatly connected to the rear end of the support module 1. The assembly of the battery module is neat and consistent, and the assembly is simple, which is conducive to improving work efficiency and saving costs.

[0077] As an illustration of this embodiment, the bracket module 1 can be made of plastic material with certain elasticity by injection molding. The slot width of at least one of the slots 104 is set to be narrower than the box wall of the battery box 4. After the box wall is embedded in the slot 104, the slot wall of the slot 104 is in an elastic compression state. Under the elastic recovery force, the slot wall exerts pressure on the embedded box wall, and the box wall is not easy to fall out.

[0078] As an illustration of this embodiment, the slot 104 may be, but is not limited to, a slot width that gradually narrows from the slot opening to the slot bottom, such as, but not limited to, linearly narrowing, and may be, but is not limited to, an inverted V shape.

[0079] In addition, on the lithium-ion battery pack module, an insulating strip 105 is spaced between the two pole ears 31 of the battery cell 3, which can be achieved by, but not limited to, setting an insulating strip 105 protruding from the front end surface at the front end of the bracket body of the bracket module 1. It is also possible but not limited to setting a protruding insulating strip 105 at the rear end of the bracket to further strengthen the insulation isolation between the two pole ears 31 of each battery cell 3 to avoid short circuit.

[0080] As an illustration of this embodiment, a buffer layer with a certain elasticity may be further provided between two adjacent battery boxes 4 on the left and right, between adjacent battery cells 3 and battery boxes 4 on the left and right, and between adjacent battery cells 3 on the left and right in the battery box 4, so as to improve the vibration resistance of the battery pack module.

[0081] As can be seen from the above, the battery pack module of this embodiment is easy to assemble. It can be used alone to provide external power, or multiple modules can be combined to form a battery pack with a larger capacity, suitable for different application scenarios.

[0082] Embodiment 3

[0083] See also Figure 1-29 Show.

[0084] This embodiment provides a lithium-ion battery pack, which includes at least two battery pack modules in Embodiment 2.

[0085] The length*thickness surface of the battery cell 3 in each battery pack module faces downward as the gravity-bearing surface of the battery cell 3. The battery pack modules are arranged side by side left and right, and the bracket modules 1 located at the front end of each battery pack module are also arranged side by side left and right at the front end of the battery pack. The relative first bracket buckle parts 102 and second bracket buckle parts 103 of each two adjacent bracket models are buckled together to form a bracket combination combined left and right. The battery pack modules are combined with each other through the bracket module 1 to form a large-capacity battery pack body.

[0086] As can be seen from the above, the lithium-ion battery pack of this embodiment is assembled from a plurality of battery pack modules that can be flexibly assembled and easily disassembled. It is easy to assemble and maintain, which is conducive to improving work efficiency and reducing production costs and maintenance costs.

[0087] This embodiment also provides an end plate 5 structure applied to the left and right ends of the battery pack to fix the battery pack. The end plate 5 has a certain thickness, one surface of the end plate 5 is a flat surface, and the other surface of the end plate 5 (referred to as the first surface) is provided with at least one hanging portion 51 and at least one recessed bundling groove 52. When used, the flat surface of the end plate 5 faces the battery pack body and is closely attached to the battery pack body, and the other surface of the end plate 5 faces away from the battery pack as the outer end surface of the battery pack.

[0088] The battery pack includes two end plates 5 and a binding member. One end plate 5 is located at the left end of the battery pack body, and the other end plate 5 is located at the right end of the battery pack, and the battery pack body is located between the two end plates 5. The binding member is located at the binding groove 52 on the outer end surface of the end plate 5 and extends, and the binding member surrounds the battery pack body and the top and bottom of the two end plates 5 in the left-right direction, and binds the battery pack body between the two end plates 5.

[0089] The lifting parts 51 provided on the outer end surface of each end plate 5 facing away from the battery pack body, when applied to electric equipment, the battery pack is hoisted between the two side walls of the power supply compartment of the electric equipment through the lifting parts 51 outside the two end plates 5, so that the lithium-ion battery pack of this embodiment is hoisted on the electric equipment. The hoisting assembly structure is conducive to reducing the vibration of the battery pack and improving the vibration resistance of the battery pack.

[0090] As an illustration of this embodiment, the lifting portion 51 on each end plate 5 can be, but is not limited to, a recessed position recessed with the outer end surface, and a positioning portion is further provided in the recessed position. The number of lifting positions of each end plate 5 is preferably two or more, and the lifting positions are horizontally symmetrical, which is conducive to improving the force balance of the battery pack installation and improving the stability of the battery pack installation. The specific setting is further based on the volume and weight of the battery pack.

[0091] As an illustration of this embodiment, the bundling groove 52 provided on the outer side of the two end plates 5 facing away from the battery pack can be one or more. The bundling groove 52 extends from the top of the end plate 5 to the bottom of the end plate 5. The bundling piece is limited in each bundling groove 52. The battery pack body is bundled between the two end plates 5 along the bundling groove 52. The design of the bundling groove 52 is conducive to the positioning of the bundling piece, and avoids the bundling piece from shifting and causing the battery pack to be disengaged. As an illustration of this embodiment, a bundling recess 53 lower than the top and bottom end surfaces of the end plate 5 can be designed on the top end surface and the bottom end surface of the bundling groove 52, respectively. The width of the bundling recess 53 is the same as the width of the bundling groove 52, which further facilitates the precise positioning of the bundling piece.

[0092] As an illustration of this embodiment, a rigid bottom protective plate 6 can be further added to the bottom of the battery pack body. The bottom protective plate 6 can be a rigid plastic plate or an aluminum plate coated with an insulating protective layer. The bottom protective plate 6 serves as a gravity bearing plate for each battery pack module, so that each battery pack module is assembled flat. The binding piece is wrapped around and bound to the bottom surface of the bottom protective plate 6, and the bottom protective plate 6, the two end plates 5 and the battery pack body are firmly bound together.

[0093] As an illustration of this embodiment, vertically upwardly bent hanging plates 61 are respectively provided on the left and right sides of the bottom protective plate 6, and the left and right hanging plates 61 are respectively fixed to the bottom protective plate fixing hole portions 54 at the lower ends of the left and right end plates 5, and the bottom protective plate 6 is connected between the end plates 5. The gravity of the bottom protective plate 6 is transmitted to the end plates 5 through the two hanging plates 61, and then transmitted to the external connection parts through the lifting portion 51. The adoption of this embodiment is conducive to further improving the assembly flatness and consistency of the battery pack and improving the structural stability of the battery pack.

[0094] As an illustration of this embodiment, a top protective plate 7 is further provided on the top surface of the battery pack, and the top protective plate 7 may be, but is not limited to, an aluminum plate. A top protective plate fixing portion 55 (such as, but not limited to, a vertical screw hole) is provided on the top of the end plate 5, and the left and right sides of the top protective plate 7 are respectively fixed to the top ends of the left and right end plates 5. Providing the top protective plate 7 is beneficial to improving the dust and moisture resistance of the battery pack.

[0095] As an illustration of this embodiment, an insulating plate 8 may be further provided between the top protective plate 7 and the battery pack body to improve the electrical protection performance of the battery pack and avoid short circuit.

[0096] As an illustration of this embodiment, an insulating protective cover plate 9 can be further provided at the front end of the battery pack body. Accordingly, a fixing column 106 protruding forward is provided at the front end of each bracket module 1, and screw holes in the front-to-back direction are provided in the fixing column 106. The insulating protective cover plate 9 is fixed to the fixing columns 106 of the bracket modules 1 at least at both ends by screws, so that the insulating protective cover plate 9 covers the front end of the battery pack module. The insulating protective cover plate 9 has a predetermined gap with the busbar 2 also located at the front end of each bracket module 1, and the wiring harness 10 composed of the wires electrically connecting the battery pack modules is located under the edge protective cover plate. The use of the insulating protective plate design is conducive to further improving the electrical safety of the battery pack and improving the dust and moisture resistance.

[0097] As an illustration of this embodiment, two electrode adapters 11 may be further provided to transfer the electrodes at the front end of the battery pack to the top of the battery pack to facilitate connection with external electric equipment. The electrode adapter 11 is a bent sheet metal part, one end of the two electrode adapters 11 is respectively connected to the positive and negative electrodes at the front end of the battery pack body, and the other end is respectively fixed to the top of the two end plates 5, so that the positive and negative electrodes of the battery pack are respectively located at the top of the two end plates 5 to output current to the outside. As an illustration of this embodiment, in order to reduce the output internal resistance of the battery pack, this embodiment uses a copper sheet as the electrode adapter 11 of this embodiment, and the middle section of the electrode adapter 11 except the electrical connection parts at the two ends is coated with an insulating layer. In addition, in order to facilitate the external connection of the power supply, a conductive adapter block 12 made of a copper block can be used, but not limited to, to connect the end of the electrode adapter 11 to the top of the end plate 5, and the conductive adapter block 12 is used as the external electrode terminal of the lithium-ion battery pack. Among them, the connection between the external electric equipment and the conductive adapter block 12 of the battery pack can be, but not limited to, welding or screw connection or other.

[0098] As an illustration of this embodiment, two insulating protective covers 13 made of insulating material are further configured. The two insulating protective covers 13 are respectively covered outside the two conductive adapter blocks 12 to protect the conductive adapter blocks 12 from dust and moisture, thereby improving the electrical safety of the battery pack.

[0099] The battery pack of this embodiment can be applied to electric equipment. A connection part matching the lifting parts 51 of the left and right end plates 5 of the battery pack is provided on the side of the power supply compartment of the electric equipment. By connecting the lifting parts 51 of the two end plates 5 of the battery pack of this embodiment to the connection parts on the side of the power supply compartment, the battery pack is hoisted in the battery compartment. The positive and negative electrodes of the battery pack are electrically connected to the positive and negative electrodes of the driving circuit of the electric equipment to output current for the driving circuit and provide power.

[0100] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A battery module, characterized in that: include, A plurality of battery cell boxes, each of which contains at least one battery cell, the battery cell boxes are arranged side by side, the largest surfaces of the battery cells are opposite to each other, and the tabs of the battery cells extend from the front open end of the battery cell boxes; A bracket module, each of the battery boxes is respectively connected to the rear end of the bracket module, the pole ears of each of the battery cells extend out from the pole ear holes of the bracket module, and a plurality of busbars are installed on the front end surface of the bracket module, each of the busbars is respectively located on the pole ear holes, the ends of each of the pole ears are respectively welded to each of the busbars, and each of the busbars is electrically connected to each of the battery cells.

2. A battery pack module according to claim 1, characterized in that: A plurality of slots are also provided at the rear end of the bracket module, and at least one slot width of each of the slots is narrower than the thickness of the wall of the battery box; At least one location of the box wall at the open end of each of the battery box is embedded in a slot, and the slot exerts elastic pressure on the embedded box wall.

3. A battery pack module according to claim 2, characterized in that: The battery box is an aluminum box.

4. A battery pack module according to claim 2, characterized in that: The end of the battery box opposite to the surface with the largest area is also an open end.

5. A battery pack module according to claim 2, characterized in that: In a natural state where the card slot is not embedded in the box wall, the slot width gradually narrows from the slot opening to the slot bottom.

6. A battery pack module according to claim 1, characterized in that: An insulating strip is provided between the positive pole ear and the negative pole ear of any of the battery cells, and the insulating strip is arranged on the insulating frame body of the bracket module.

7. A battery module according to claim 1, characterized in that: A buffer layer is provided between any two adjacent battery cells in the same battery cell box and / or between any two adjacent battery boxes.

8. The battery pack module according to claim 1, characterized in that: There is one or more battery cells in each of the battery cell boxes.

9. The battery module according to claim 1, characterized in that: At the rear end of the insulating frame body of the support module, a plurality of limit plates extending backward are arranged along the outer edge of the frame body, and the outer side surfaces of the battery boxes arranged side by side are limited to the inner sides of the limit plates.

10. A battery pack module, characterized in that: A battery module comprising any one of plural battery modules according to claims 1 to 9.

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