Support module suitable for modular assembly of battery pack and battery pack module

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a bracket module suitable for modular assembly of a battery pack and a battery pack module. The support module comprises an insulated frame body, a plurality of pole lug hole grooves which are through front and back are formed in the frame body so that pole lugs can stretch out, a first support buckling part is arranged on one side of at least two opposite sides of the frame body, and a second support buckling part which is opposite to the first support buckling part is arranged on the other side of the frame body. And the plurality of conductive confluence plates are arranged on the front end surface of the frame main body and are respectively positioned on the lug hole slots or on the sides of the lug hole slots, so that the tail ends of the extending lugs are welded on the front end surfaces of the confluence plates.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, in particular to a bracket module and a battery pack module suitable for modular assembly of battery packs. Background Art

[0002] With the increasingly wide application of batteries, especially the application of lithium-ion batteries, more and more devices using lithium-ion batteries are emerging, and the usage environments are becoming more and more complex and diverse. With the wide popularization of the application of lithium-ion batteries, the market competition is becoming increasingly fierce, and the manufacturing cost, assembly, maintenance flexibility requirements of lithium-ion battery packs during the manufacturing, repair and maintenance processes are also getting higher and higher.

[0003] During the research process of the present utility model, the inventor found that the current lithium-ion battery packs are mainly assembled by splicing cell bodies, wound into groups with tapes, or connected into groups by screws. There are risks that the cells are prone to looseness and detachment in the prior art; moreover, the assembly of the prior art is mainly manual operation, which cannot guarantee the consistency of products, has the defect of low production efficiency, and is not conducive to the repair and maintenance of battery packs, 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 bracket module and a lithium-ion battery pack module suitable for modular assembly of battery packs. Applying this technical solution is beneficial to improving the assembly neatness of lithium-ion battery modules; improving the assembly consistency of battery packs; and improving work efficiency.

[0005] A bracket module suitable for modular assembly of battery packs provided by an embodiment of the present utility model includes:

[0006] An insulating frame body, in which a plurality of front-to-back through ear holes are formed for each ear to extend out.

[0007] On at least one of two opposite sides of the frame body, a first bracket buckle part is provided, and on the other side, a second bracket buckle part opposite to the first bracket buckle part is provided;

[0008] A plurality of conductive busbars, each of which is installed on the front end face of the frame body, and is respectively located on or beside each ear hole for the end of each extended ear to be welded to the front end face of the busbar.

[0009] Optionally, a plurality of card slots are further provided at the rear end of the frame body, and the openings of each card slot face backward.

[0010] Optionally, the slot width of the card slot gradually becomes narrower from the slot opening to the slot bottom.

[0011] Optionally, the groove wall of the card slot is made of an elastic material.

[0012] Optionally, a raised insulating strip is further provided between at least two adjacent tab hole grooves.

[0013] Optionally, the tab hole grooves are distributed in rows, each row includes two tab hole grooves, and one of the tab hole grooves in each row of two tab hole grooves is for the positive electrode of a battery cell to extend out, and the other tab hole groove is for the negative electrode of the battery cell to extend out.

[0014] Optionally, a tab groove that penetrates through the front and back and is parallel to the tab hole groove is further provided on the bus bar for the tab to extend out.

[0015] Optionally, a wire harness limiting groove is further provided on the front end face of the frame body, and the wire harness limiting groove is located between the two tab hole grooves in each row.

[0016] A raised wire harness fixing column is further provided on the groove wall of the wire harness limiting groove, and the wire harness fixing column has a predetermined distance from the groove bottom.

[0017] Optionally, at the rear end of the frame body, a plurality of limiting pieces extending backward are arranged along the outer edge of the frame body.

[0018] In a second aspect, an embodiment of the present invention provides a battery pack module, including any one of the above-mentioned bracket modules.

[0019] As can be seen from the above, by adopting the technical solution of this embodiment, it can be seen that the tab hole grooves preset on the bracket module of this embodiment can position the two tabs of each battery cell, and connect the tabs between the battery cells through the bus bar located on the tab hole grooves, realizing the series-parallel connection between the battery cells 3, and also realizing the positioning of the tabs. This solution is applied to the assembly of the battery pack module, which is beneficial 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.

[0020] As can be seen from the above, applying the bracket module of this embodiment in the modular assembly of the battery pack is beneficial to improving the electrical connection between the battery cells in the battery pack module, improving the assembly efficiency of the battery pack module, and improving the assembly consistency. Moreover, the two opposite sides of this bracket module are respectively provided with matching bracket buckle parts, which can further facilitate the further assembly combination between the battery pack modules, meet different application needs, and improve the assembly flexibility and consistency of the battery pack. During the maintenance process of the battery pack, the battery pack module can be flexibly disassembled, installed, or replaced, with flexible application and convenience. 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 to the present invention.

[0022] Figure 1 Schematic diagram of the decomposed structure of the bracket module provided for Embodiments 1 to 3 of the present utility model;

[0023] Figure 2 、 3 Schematic diagrams of the front-end perspective and three-dimensional structure of the rear end of the frame body of the bracket module provided for Embodiments 1 to 3 of the present utility model respectively;

[0024] Figure 4 、 5 6, 7, 8 are respectively the front view, rear view, side view, top view, and bottom view structure diagrams of the frame body of the bracket module provided for Embodiments 1 to 3 of the present utility model;

[0025] Figure 9 Schematic diagram of the decomposed structure of the battery pack module provided for Embodiments 1 to 3 of the present utility model;

[0026] Figure 10 Front view structure diagram of the battery pack module provided for Embodiments 1 to 3 of the present utility model;

[0027] Figure 11 is Figure 10 A - A cross-sectional structure diagram of;

[0028] Figure 12 、 13 14, 15 are respectively the rear view, side view, top view, and bottom view structure diagrams of the battery pack module provided for Embodiments 1 to 3 of the present utility model;

[0029] Figure 16 Three-dimensional structure diagram of the end plate provided for Embodiments 1 to 3 of the present utility model;

[0030] Figure 17 、 18 19, 20, 21 are respectively the front view, rear view, side view, top view, and bottom view structure diagrams of the end plate provided for Embodiments 1 to 3 of the present utility model;

[0031] Figure 22 Schematic diagram of the decomposed structure of the lithium-ion battery pack provided for Embodiments 1 to 3 of the present utility model;

[0032] Figure 23 Three-dimensional structure diagram of the lithium-ion battery pack provided for Embodiments 1 to 3 of the present utility model when the insulating protection cover plate is not covered;

[0033] Figure 24 is Figure 23 Front view structure diagram of;

[0034] Figure 25Schematic three-dimensional structure diagram of the lithium-ion battery pack provided by Embodiments 1 to 3 of the present utility model after covering the insulating protection cover plate;

[0035] Figure 26 Schematic front view structure diagram of the lithium-ion battery pack provided by Embodiments 1 to 3 of the present utility model after fixing the insulating protection cover plate;

[0036] Figure 27 is Figure 26 Schematic B-B sectional structure diagram of;

[0037] Figure 28 Schematic top view structure diagram of the lithium-ion battery pack provided by Embodiments 1 to 3 of the present utility model after fixing the insulating protection cover plate;

[0038] Figure 29 is Figure 28 Schematic A-A sectional structure diagram of.

[0039] 1: Bracket module; 101: Ear hole groove; 102: First bracket buckle part; 103: Second bracket buckle part; 104: Card slot; 105: Insulating strip; 106: Fixed column; 107: Frame main body; 2: Busbar; 21: Ear slot; 3: Battery cell; 31: Ear; 4: Battery cell box; 5: End plate; 51: Lifting part; 52: Bundling groove; 53: Bundling recess; 54: Bottom protection plate fixing hole part; 55: Top protection plate fixing part; 6: Bottom protection plate; 61: Hanging plate. 7: Top protection plate; 8: Insulating plate; 9: Insulating protection cover plate; 10: Wiring harness; 11: Electrode adapter piece; 12: Conductive adapter block; 13: Protective cover. Detailed implementation manners

[0040] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the schematic embodiments of the present utility model and the descriptions are used to explain the present utility model, but do not limit the present utility model.

[0041] Embodiment 1.

[0042] Refer to Figure 1-29 shown.

[0043] This embodiment provides a bracket module 1 suitable for modular assembly of a battery pack, which mainly includes a frame body with a surface insulation or made of insulating material, and a plurality of busbars 2 made of conductive material. Among them, at least two through tab holes 101 are dug in the frame body, and a busbar 2 fixing portion for fixing the busbar 2 is also provided beside each tab hole 101. Each busbar 2 is fixed to the front end face of the frame body, located on each tab hole 101 respectively, or fixed beside each tab hole 101. When located on each tab hole 101, there is a gap between one side or both sides of the busbar 2 and the groove wall of the tab hole 101 for the tab to protrude.

[0044] During application, the bracket module 1 is installed at the end of a battery pack module composed of multiple battery cells 3. The two tabs 31 of each battery cell 3 can respectively protrude from each tab hole 101 of the bracket module 1. The ends of the protruding tabs are respectively bent on the front end face of each busbar 2 on or beside the tab hole 101 and are tightly welded to the front end face of the busbar 2. Each battery cell 3 realizes the series connection, parallel connection or combination of series and parallel connection among the battery cells 3 through each busbar 2.

[0045] As can be seen from the above, the preset tab holes 101 on the bracket module 1 of this embodiment can position the two tabs 31 of each battery cell 3, connect the tabs between the battery cells 3 through the busbar 2 located on the tab hole 101, realize the series-parallel connection between the battery cells 3, and also realize the positioning of the tabs. The application of this solution to the assembly of the battery pack module is beneficial 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.

[0046] As a schematic illustration of this embodiment, matching bracket buckle portions are respectively provided on at least two opposite sides of the frame body. Denote the bracket buckle portion on one side of the frame bracket as the first bracket buckle portion 102, and denote the bracket buckle portion provided on the other opposite side and facing away from the first bracket buckle portion 102 as the second bracket buckle portion 103. The structures of the first bracket buckle portion 102 and the second bracket buckle portion 103 are matched. For example, one of them is a concave portion and the other is a convex portion opposite to the concave portion.

[0047] As an illustration of this embodiment, a bracket buckle portion can be provided on each of the two sides of the frame body of the bracket module 1; alternatively, a plurality of bracket buckle portions can be provided on each of the two sides. Among them, 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 respectively provided on the left and right sides of the bracket module 1. The bracket module 1 is used to connect a plurality of battery cells 3 to form a battery pack module, and then these battery pack modules are arranged in the left-right direction to form a battery pack. At this time, the bracket modules 1 on any two adjacent battery pack modules on the left and right are opposite to each other left and right, and the two opposite bracket modules 1 are buckled and connected through the opposite first bracket buckle portion 102 and the second bracket buckle portion 103. According to this principle, a plurality of battery pack modules are similarly buckled together left and right to form a battery pack as a whole with a larger capacity. The battery pack modules can be electrically connected through wires.

[0048] As can be seen from the above, applying the bracket module 1 of this embodiment in the modular assembly of the battery pack is beneficial to improving the electrical connection between the battery cells 3 in the battery pack module, improving the assembly efficiency of the battery pack module, and improving the consistency of assembly. Moreover, the two opposite sides of the bracket module 1 are respectively provided with matching bracket buckle portions, which can further facilitate the further assembly and combination between the battery pack modules, meet different application requirements, and improve the assembly flexibility and consistency of the battery pack. During the maintenance of the battery pack, the battery pack modules can be flexibly disassembled, added, or replaced, with flexible application and convenience.

[0049] As an illustration of this embodiment, a card slot 104 with a notch facing backward can be further provided at the rear end of the frame body, and at least one place of the slot width of the card slot 104 is slightly narrower than the wall of the battery cell box 4 used for assembling the battery cells 3 on the battery pack module. When applied to the assembly of the battery pack module, the wall of the front open end of the battery cell box 4 is pushed forward from the rear and embedded into the card slot 104 located at the rear end of the frame body, so that each battery cell box 4 is fixedly connected to the rear end of the bracket module 1, realizing the connection between the battery cell boxes 4 and the connection between each battery cell box 4 and this bracket module 1, which is beneficial 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.

[0050] As an illustration of this embodiment, the slot width of the card slot 104 can be, but is not limited to, set to gradually become narrower from the notch to the bottom of the slot. For example, but not limited to, it is designed to be linearly narrowed, for example, but not limited to, making the card slot 104 in an inverted V shape. Adopting this design is beneficial to facilitating the pushing of the wall of the battery cell box 4 into the card slot 104 and improving the convenience of assembly.

[0051] As an illustration of this embodiment, the slot walls of the card slot 104 at the rear end of the bracket module 1 of this embodiment have a certain elasticity. When the wall of the battery cell box 4 is pushed into the card slot 104 from the rear end, the slot walls of the card slot 104 elastically deform, and the wall of the battery cell box 4 can be tightly pressed into the card slot 104, thus realizing the connection between the bracket module 1 and each battery cell box 4. When disassembly is required, only the battery cell box 4 needs to be pulled out backward, and the disassembly is very convenient, which is beneficial to the maintenance of the battery pack.

[0052] As an illustration of this embodiment, the bracket module 1 of this embodiment can be, but is not limited to, made of plastic material by injection molding process, and the tab holes 101 and the card slots 104 are integrally formed on the frame body.

[0053] As an illustration of this embodiment, a raised insulating strip 105 can also be provided between the two tab holes 101 of the bracket frame to increase the insulation interval between the positive and negative poles of the battery pack module.

[0054] As an illustration of this embodiment, the tab holes 101 provided on the bracket 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 out, and the other is for the negative tab of the battery cell 3 to extend out.

[0055] As an illustration of this embodiment, two tab holes 101 can be provided in a row on the bracket module 1. This design is applicable to the battery pack module in which the battery cells 3 are connected in parallel. The positive poles of all the battery cells 3 jointly extend out from one tab hole 101, and the negative poles of all the battery cells 3 jointly extend out from the other tab hole 101.

[0056] As an illustration of this embodiment, at least two rows of tab holes 101 can be provided on the bracket module 1, and each row has two tab holes 101. This design can be applied to the series connection of the battery cells 3. The positive pole of any battery cell 3 and the negative pole of another adjacent battery cell 3 are in the same column. The positive pole of any battery cell 3 and the negative pole of another adjacent battery cell 3 jointly extend out from one of the tab holes 101 in a row and are jointly connected to the front end face of the bus bar 2 corresponding to the tab hole 101; the negative pole of this battery cell 3 and the positive pole of the adjacent battery cell 3 jointly extend out from the other of the tab holes 101 in this row and are connected together through the bus bar 2. By analogy, the series connection between the battery cells 3 is realized, forming a battery pack module.

[0057] The above series and parallel connections between the battery cells 3 are only application examples of this embodiment, and the actual situation is not limited to this.

[0058] As an illustration of this embodiment, a lug groove 21 running through the front and back can be further designed on the bus bar 2 of this embodiment for the lugs to extend from the rear end of the bus bar 2 to the front end of the bus bar 2. In this way, the lugs of each battery cell 3 can not only extend out from the lug hole grooves 101 beside the bus bar 2, but also extend out from the lug groove 21 in the middle of the bus bar 2. When the lugs of a relatively large number of battery cells 3 extend out from a lug hole groove 101, the lugs on both sides can extend out from both sides of the bus bar 2, and the lugs in the middle position can extend out from the lug groove 21 in the middle of the bus bar 2. Applying this design in this scenario is beneficial to reducing the bending degree of the lugs, avoiding damage caused by excessive bending of the lugs, and is beneficial to improving the flatness of the assembly and the consistency of the assembly.

[0059] 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 lug hole grooves 101 in each row, and wire harness 10 fixing posts 106 protruding into the wire harness 10 limiting groove are also provided on the groove wall of the wire harness 10 limiting groove. With this design, when electrically connecting each battery pack module with wires, the wire harness 10 composed of these wires can be routed along the wire harness 10 limiting groove, and the wire harness 10 limiting groove is used as a wire groove. The wire harness 10 fixing posts 106 protruding from the groove wall of the wire harness 10 bind the wire harness 10 in the wire harness 10 limiting groove, improving the flatness of the routing of the wire harness 10 and the consistency of the battery pack.

[0060] As an illustration of this embodiment, at the rear end of the frame body of the bracket module 1, a plurality of limiting pieces extending backward are provided along at least two opposite outer edges at the rear end. The area between the opposite limiting pieces serves as the accommodating area for the battery cell box 4 connected to the rear end of the bracket module 1, limiting the position of the battery cell box 4, improving the assembly efficiency of the battery pack module, and improving the flatness of the assembled battery pack module.

[0061] Embodiment Two.

[0062] See Figure 1-29 Shown.

[0063] 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.

[0064] A battery cell 3 is placed in each battery cell box 4, and the number of battery cells 3 in each battery cell box 4 can be one or more.

[0065] According to the series and parallel electrical connection relationship between the predetermined battery cells 3, the battery cell boxes 4 are arranged side by side in sequence from left to right. With the surface of the battery cell 3 with length * thickness facing downwards as the gravity bearing surface of the battery cell 3, the largest surface (length * width) of each battery cell 3 faces each other left and right, and the tabs of each battery cell 3 extend from the open end at the front end of the battery cell box 4 to the front end.

[0066] The bracket module 1 is installed at the front end of these battery cell boxes 4 that make up 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 respectively located on or beside each tab hole groove 101. The tabs extending from the tab hole grooves 101 are bent, and the ends are tightly welded to the busbar 2. In this way, each battery cell 3 is electrically connected together in series or in parallel or a combination of series and parallel through each busbar 2.

[0067] For the specific connection structure, reference can be made to, but is not limited to, the descriptions in Embodiments 1 and 3.

[0068] As can be seen from the above, by applying this embodiment, the battery cell boxes 4 neatly group and assemble the battery cell bodies 3. A plurality of battery cell boxes 4 are connected by a bracket module 1, and a plurality of battery cells 3 are connected in series and parallel through the tab hole grooves 101 and busbars 2 on the bracket module 1. The battery pack module has a high degree of assembly neatness, high consistency, and is convenient for assembly and disassembly, which is beneficial to improving work efficiency.

[0069] In addition, on the two opposite sides of the bracket module 1 at the front end of each battery pack module, a first bracket buckle portion 102 and a second bracket buckle portion 103 facing away from each other are respectively provided. In this way, any two battery pack modules (denoted as the first battery module and the second battery module) are arranged side by side from left to right. The first bracket buckle portion 102 of the first battery pack module is in positive buckling cooperation with the second bracket buckle portion 103 of the second battery pack module adjacent to this battery pack module, and the two battery pack modules are connected together from left to right to form a large-capacity battery pack. The connection of the electrodes between the battery pack modules can be achieved by wire connection.

[0070] As can be seen from the above, the battery pack module of this embodiment has a high degree of assembly neatness, good consistency, and is simple and convenient for assembly and disassembly, which is beneficial to improving work efficiency and saving costs.

[0071] A plurality of battery pack modules of this embodiment can be flexibly assembled to form a large-capacity lithium-ion battery pack. For the specific assembly method and structure, reference can be made to the descriptions in Embodiments 1 and 3.

[0072] The battery cell box 4 of this embodiment can be, but is not limited to, a sheet metal part made of a metal sheet such as an aluminum plate with good thermal conductivity and light weight. The front end of the battery cell box 4 is an open end. Preferably but not limitedly, the right side (or left side) of the battery cell box 4 is also an open end, and the open end on this side is opposite to the largest area surface of the battery cell box 4. The battery cell 3 is placed horizontally in the battery cell box 4. For the outermost battery cell 3, its largest area surface is exposed at the lateral open end of the battery cell box 4, and the outermost battery cell 3 is in contact with the side surface of another adjacent battery cell box 4 (or through a buffer sheet).

[0073] In this embodiment, the battery cell box 4 is used to neatly group and assemble the battery cells 3, which is beneficial to the assembly and 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 pack module.

[0074] As an illustration of this embodiment, the connection between the bracket module 1 and each battery cell box 4 can be, but is not limited to, as follows:

[0075] At the rear end of the frame body of the bracket module 1 in this embodiment, a plurality of card slots 104 are provided. The number of card slots 104 is equal to or more than the number of battery cell boxes 4. At least one place on the box wall of the open end at the front of each battery cell box 4 is respectively limited in at least one card slot 104 at the rear end of the bracket module 1. The battery cell boxes 4 are neatly connected to the rear end of the bracket module 1. The assembly neatness of the battery pack module is high, the consistency is good, and the assembly is simple, which is beneficial to improving work efficiency and saving costs.

[0076] As an illustration of this embodiment, the bracket module 1 can be injection-molded from a plastic material with certain elasticity. The slot width of at least one place of the card slot 104 is set to be narrower than the box wall of the battery cell box 4. After the box wall is embedded in the card slot 104, the slot wall of the card slot 104 is in an elastically compressed state. Under the action of the elastic recovery force, the slot wall has a pressure on the embedded box wall, and the box wall is not easy to come out.

[0077] As an illustration of this embodiment, the card slot 104 with a slot width gradually narrowing from the slot opening to the slot bottom can be used, such as but not limited to linear narrowing, and can be but not limited to an inverted V shape.

[0078] In addition, on the lithium-ion battery pack module, an insulating strip 105 is provided between the two pole tabs 31 of the battery cell 3. It can be realized by, but is not limited to, setting an insulating strip 105 protruding from the front end face at the front end of the bracket body of the bracket module 1. It can also be, but is 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 tabs 31 of each battery cell 3 and avoid short circuit.

[0079] As an illustration of this embodiment, a buffer layer with a certain elasticity can be further provided between two adjacent battery cell boxes 4 on the left and right, between the adjacent battery cells 3 and the battery cell boxes 4 on the left and right, and between the adjacent battery cells 3 within the battery cell box 4, respectively, to improve the anti-vibration performance of the battery pack module.

[0080] As can be seen from the above, the battery pack module of this embodiment is easy to assemble. It can either be used alone to provide power externally or be combined with multiple others to form a battery pack with a larger capacity, suitable for different application scenarios.

[0081] Embodiment Three.

[0082] See Figure 1-29 Figure.

[0083] This embodiment provides a lithium-ion battery pack, which includes at least two battery pack modules in Embodiment 2.

[0084] The surface of the battery cell body in each battery pack module with length * thickness faces downward as the gravity-bearing surface of the battery cell 3. Each battery pack module is arranged side by side on the left and right. Each bracket module 1 at the front end of each battery pack module is also arranged side by side at the front end of the battery pack. The relative first bracket buckle part 102 and the second bracket buckle part 103 of every two adjacent bracket models are buckled together to form a bracket combination arranged together on the 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.

[0085] As can be seen from the above, the lithium-ion battery pack of this embodiment is assembled from multiple battery pack modules that can be flexibly assembled and disassembled conveniently. The assembly is simple and the maintenance is easy, which is beneficial to improving work efficiency, reducing production costs and maintenance costs.

[0086] This embodiment also provides an end plate 5 structure applied to both 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 at least one lifting part 51 and at least one concave bundling groove 52 are provided on the other surface (denoted as the first surface) of the end plate 5. During application, the flat surface of the end plate 5 faces the battery pack body and closely adheres to the battery pack body, and the other surface of the end plate 5 faces away from the battery pack as the outer end face of the battery pack.

[0087] The battery pack includes two end plates 5 and a bundling 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. The battery pack body is limited between the two end plates 5. The bundling member extends along the bundling groove 52 on the outer end face of the end plate 5. The bundling member surrounds the top and bottom of the battery pack body and the two end plates 5 in the left-right direction to bundle the battery pack body between the two end plates 5.

[0088] Lifting portions 51 are provided on the outer end faces of each end plate 5 facing away from the battery pack body. When applied to an electric device, the battery pack is hoisted between the two side walls of the power supply compartment of the electric device through the lifting portions 51 outside the two end plates 5, so that the lithium-ion battery pack of this embodiment is hoisted on the electric device. The hoisting assembly structure is beneficial to reducing the vibration received by the battery pack and improving the vibration resistance performance of the battery pack.

[0089] As an illustration of this embodiment, the lifting portions 51 on each end plate 5 can be, but are not limited to, recesses recessed from the outer end face, and positioning portions are further provided in the recesses. The number of lifting positions on each end plate 5 is preferably two or more, and the lifting positions are horizontally symmetric with each other, which is beneficial to improving the force balance during the installation of the battery pack and enhancing the installation stability of the battery pack. Specifically, it is further set according to the volume and weight of the battery pack.

[0090] As an illustration of this embodiment, the bundling grooves 52 provided on the outer side faces of the two end plates 5 facing away from the battery pack can be one or more. The bundling grooves 52 extend from the top of the end plate 5 to the bottom of the end plate 5. The bundling members are limited in each bundling groove 52, and the battery pack body is bundled between the two end plates 5 along the bundling grooves 52. The design of the bundling grooves 52 is beneficial to the positioning of the bundling members and avoids the battery pack coming apart due to the displacement of the bundling members. As an illustration of this embodiment, bundling recesses 53 lower than the top and bottom end faces of the end plate 5 can be respectively designed on the top end face and the bottom end face of the bundling groove 52. The width of the bundling recesses 53 is the same as the width of the bundling grooves 52, which further facilitates the precise positioning of the bundling members.

[0091] As an illustration of this embodiment, a rigid bottom protection plate 6 can be further added to the bottom of the battery pack body. The bottom protection plate 6 can be a rigid plastic plate or an aluminum plate with an insulating protective layer on its surface. The bottom protection plate 6 serves as the gravity bearing plate for each battery pack module, making the assembly of each battery pack module flat. The bundling members are wound around the bottom surface of the bottom protection plate 6 to firmly bundle the bottom protection plate 6, the two end plates 5, and the battery pack body together.

[0092] As an illustration of this embodiment, lifting plates 61 that bend vertically upward are respectively provided on the left and right sides of the bottom protection plate 6. The left and right lifting plates 61 are respectively fixed to the bottom protection plate fixing hole portions 54 at the lower ends of the left and right end plates 5. The bottom protection plate 6 is connected between the two end plates 5. The gravity received by the bottom protection plate 6 is transmitted to the two end plates 5 through the two lifting plates 61, and then transmitted to the external connecting member through the lifting portions 51. Adopting the solution of this embodiment is beneficial to further improving the assembly flatness and consistency of the battery pack and enhancing the structural stability of the battery pack.

[0093] As an illustration of this embodiment, a top protection plate 7 is further provided on the top surface of the battery pack. The top protection plate 7 can be, but is not limited to, made of an aluminum plate. A top protection plate fixing part 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 protection plate 7 are respectively fixed to the tops of the left and right end plates 5. Setting the top protection plate 7 is beneficial to improving the dust and moisture protection performance of the battery pack.

[0094] As an illustration of this embodiment, an insulating plate 8 can be further provided between the top protection plate 7 and the battery pack body to improve the electrical protection performance of the battery pack and avoid short circuits.

[0095] As an illustration of this embodiment, an insulating protection cover plate 9 can be further provided at the front end of the battery pack body. Correspondingly, fixing posts 106 protruding forward are respectively provided at the front ends of each bracket module 1, and screw holes in the front-back direction are provided in the fixing posts 106. The insulating protection cover plate 9 is fixed to the fixing posts 106 of at least two end bracket modules 1 by screws, so that the insulating protection cover plate 9 covers the front end of the battery pack module. The insulating protection cover plate 9 has a predetermined gap from the bus bar 2 also located at the front ends of each bracket module 1. The wire harness 10 composed of wires electrically connecting each battery pack module is located under the insulating protection cover plate. The use of the insulating protection plate design is beneficial to further improving the electrical safety of the battery pack and enhancing the dust and moisture protection performance.

[0096] As an illustration of this embodiment, two electrode adapter pieces 11 can be further provided to transfer the electrodes located at the front end of the battery pack to the top of the battery pack to facilitate connection to external electric devices. The electrode adapter pieces 11 are bent sheet metal parts. One ends of the two electrode adapter pieces 11 are respectively connected to the positive and negative electrodes at the front end of the battery pack body, and the other ends are respectively fixed to the tops of the two end plates 5, so that the positive and negative electrodes of the battery pack are respectively located at the tops of the two end plates 5 to output current externally. As an illustration of this embodiment, in order to reduce the output internal resistance of the battery pack, copper sheets are used as the electrode adapter pieces 11 of this embodiment, and an insulating layer is coated on the middle section of the electrode adapter pieces 11 except for the electrical connection parts at the two ends. In addition, in order to facilitate the external connection of the power supply, a conductive adapter block 12 made of, but not limited to, a copper block can be used to connect the ends of the electrode adapter pieces 11 to the tops of the end plates 5, and the conductive adapter block 12 is used as the external electrode terminal of this lithium-ion battery pack. Among them, the connection between the external electric device and the conductive adapter block 12 of this battery pack can be, but is not limited to, welding or screw connection or others.

[0097] As an illustration of this embodiment, two insulating protective covers 13 made of insulating materials are further configured. The two insulating protective covers 13 respectively cover outside the two conductive adapter blocks 12 to provide dust and moisture protection for the conductive adapter blocks 12 and improve the electrical safety of the battery pack.

[0098] The battery pack of this embodiment can be applied to an electric device. A connecting portion matching the lifting portions 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 device. By connecting the lifting portions 51 of the two end plates 5 of the battery pack of this embodiment to the connecting portion on the side of the power supply compartment, the battery pack is hoisted into the battery compartment. The positive and negative electrodes of the battery pack are electrically connected to the positive and negative electrodes of the drive circuit of the electric device to output current to the drive circuit and provide power supply.

[0099] The above-described embodiments do not constitute a limitation on the protection scope of the technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments shall be included in the protection scope of the technical solution.

Claims

1. A bracket module suitable for modular assembly of battery packs, characterized in that: include, The insulating frame body has a plurality of tab holes extending frontward and rearward through the frame body for the tabs to extend out. A first bracket buckle portion is provided on one of at least two opposite sides of the frame body, and a second bracket buckle portion opposite to the first bracket buckle portion is provided on the other side; A plurality of conductive busbars are installed on the front end surface of the frame body and are respectively located on or on the side of each pole ear hole slot so that the ends of each pole ear extending out can be welded to the front end surface of the busbar.

2. The bracket module suitable for modular assembly of battery packs according to claim 1, characterized in that: A plurality of card slots are also arranged at the rear end of the frame body, and the notch of each card slot faces backwards.

3. The bracket module suitable for modular assembly of battery packs according to claim 2, characterized in that: The slot width of the card slot gradually narrows from the slot opening to the slot bottom.

4. The bracket module suitable for modular assembly of battery packs according to claim 2, characterized in that: The slot wall of the clamping slot is made of elastic material.

5. The bracket module suitable for modular assembly of battery packs according to claim 1, characterized in that: A raised insulating strip is also provided between at least two adjacent pole ear holes.

6. The bracket module suitable for modular assembly of battery packs according to claim 1, characterized in that: The pole ear holes are distributed in rows, each row includes two pole ear holes, one of the two pole ear holes in each row is for the positive electrode of a battery cell to extend out, and the other pole ear hole is for the negative electrode of the battery cell to extend out.

7. The bracket module suitable for modular assembly of battery packs according to claim 2, characterized in that: The busbar is also provided with a pole ear slot which runs through the front and back and is parallel to the pole ear hole slot, so that the pole ear can extend out.

8. The bracket module suitable for modular assembly of battery packs according to claim 7, characterized in that: A wire harness limiting groove is also provided on the front end surface of the frame body, and the wire harness limiting groove is located between the two pole ear hole grooves in each row. A protruding wire harness fixing column is also provided on the groove wall of the wire harness limiting groove, and the wire harness fixing column has a predetermined distance from the groove bottom.

9. The bracket module suitable for modular assembly of battery packs according to claim 1, characterized in that: At the rear end of the frame body, a plurality of limit plates extending backwards are arranged along the outer edge of the frame body.

10. A battery module, characterized in that: A bracket module comprising any one of claims 1 to 9.

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