Battery module and electronic equipment

Abstract

The invention relates to a battery module and electronic equipment, the battery module comprises a plurality of rows of battery cell components which are sequentially arranged along a first direction, and each row of battery cell components comprises a plurality of cylindrical battery cells which are sequentially arranged along a second direction; the bracket assembly comprises a supporting plate and a plurality of battery cell holes formed in the supporting plate in an array manner, and the cylindrical battery cells are inserted into the corresponding battery cell holes, so that a plurality of rows of battery cell assemblies are fixed by one supporting plate; wherein the supporting plate is provided with a plurality of convex structures along a third direction, and one convex structure is arranged between the plurality of adjacent battery cell holes; the first glue solution flows into a gap between the corresponding battery cell hole and the cylindrical battery cell through the convex structure so as to fix the cylindrical battery cell in the battery cell hole; wherein any two of the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is consistent with the thickness direction of the supporting plate.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module and an electronic device. Background Art

[0002] With the introduction of energy-saving and environmental protection concepts, new energy has ushered in a vigorous development. Electric bicycles, scooters, motorcycles and other products have been widely used. Battery packs based on lithium battery modules have a high market share due to their excellent performance.

[0003] In the related art, the battery module uses a double bracket to accommodate the single battery, and is fastened by screws to achieve the purpose of fixing the battery. However, the internal structure of the battery module is relatively complex, the integration is low, and screws are required for fastening in many places, which greatly affects the stability of the battery module and increases the risk of battery pack failure. In addition, the use of double brackets to fix the battery occupies a large space inside the battery module, reducing the energy density of the battery pack. When assembling and fastening the bracket, the material and production line operation time are increased, which does not conform to the concept of cost reduction. Summary of the invention

[0004] The present application provides a battery module and an electronic device, which can simplify the internal structure, improve the stability of the battery module, reduce the internal space occupied by the battery module, reduce materials and production line operation time, reduce costs, and improve operation efficiency.

[0005] In a first aspect, the present application provides a battery module, comprising:

[0006] A plurality of rows of battery cell assemblies are sequentially arranged along a first direction, and each row of the battery cell assemblies comprises a plurality of cylindrical battery cells sequentially arranged along a second direction;

[0007] A bracket assembly, comprising a support plate and a plurality of battery cell holes arrayed on the support plate, wherein the cylindrical battery cells are inserted into the corresponding battery cell holes, so that one support plate can fix multiple rows of battery cell assemblies; wherein the support plate is provided with a plurality of protrusion structures along a third direction, and one protrusion structure is provided between a plurality of adjacent battery cell holes; and

[0008] A first glue solution flows into the gap between the corresponding battery cell hole and the cylindrical battery cell through the protruding structure to fix the cylindrical battery cell in the battery cell hole;

[0009] Any two of the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is consistent with the thickness direction of the support plate.

[0010] In a possible implementation, a plurality of arc-shaped grooves are sequentially arranged on the circumferential outer side wall of the protrusion structure;

[0011] The arc-shaped groove fits with the edge of the battery cell hole, so that the first glue can enter into the gap between the corresponding battery cell hole and the cylindrical battery cell along the arc-shaped groove.

[0012] In a possible implementation, the battery module includes a circuit board, a wire harness, and two busbar assemblies, the circuit board is located on one side of the support plate along the first direction, and the circuit board is mounted to the support plate;

[0013] The two busbar assemblies are arranged on both sides of the support plate along the third direction, the battery cell assembly is electrically connected to the circuit board through the busbar assemblies, and the wire harness is electrically connected to the circuit board.

[0014] In a possible implementation manner, a locking member is provided on the circuit board, and the circuit board is mounted to the support plate through the locking member.

[0015] In a possible implementation manner, a plurality of heat conducting members are disposed on the circuit board, and the heat conducting members are located on a side of the circuit board away from the support plate.

[0016] In a possible implementation, the heat conducting member includes a heat conducting column and heat conducting cotton, and the heat conducting cotton is connected to the circuit board through the heat conducting column.

[0017] In a possible implementation, the wire harness includes a wire hoop, at least one connector, and a plurality of wires, one end of the plurality of wires is electrically connected to the circuit board, and the other end of the wires passes through the wire hoop and is connected to the connector.

[0018] In a possible implementation, the wire clamp includes a multi-layer clamp body, the multi-layer clamp body is stacked in sequence, and the sizes of the multi-layer clamp body are the same or different.

[0019] In a possible implementation, each of the busbar assemblies includes a first busbar and a plurality of second busbars;

[0020] A first bus bar extends along the first direction, and the first bus bar is electrically connected to the cylindrical battery core located at the edge;

[0021] A plurality of the second bus bars are arranged in sequence along the second direction and are electrically connected to the corresponding cylindrical battery cells.

[0022] In a possible implementation, each of the second busbars includes a first connecting body, a first bending body, a first connecting wing and a plurality of third connecting wings, the plurality of third connecting wings are respectively connected to the first connecting body, and the third connecting wings are electrically connected to the corresponding cylindrical battery core;

[0023] The first bending body is connected to the first connecting wing and the first connecting body respectively, and the first connecting wing is electrically connected to the circuit board; wherein the first bending body is bent relative to the first connecting body and is in an arc shape.

[0024] In a possible implementation, the first busbar includes a second connecting body, a second bending body, a second connecting wing, a plurality of connecting plates and a plurality of convex hull structures, the second bending body is respectively connected to the second connecting wing and the second connecting body, and the second connecting wing is electrically connected to the circuit board; wherein the second bending body is bent relative to the second connecting body and is in an arc shape;

[0025] Every two adjacent convex structures are arranged on one connecting plate, the connecting plate is fixedly connected to the second connecting body, and the convex structure is electrically connected to the corresponding cylindrical battery core.

[0026] In a possible implementation, the battery module further includes two protective layers, and the protective layers are attached to the corresponding busbar components.

[0027] In a possible implementation, the protective layer includes a protective plate and a plurality of first protective pad layers, the protective plate is attached to the bus assembly, and the plurality of first protective pad layers are respectively attached to a side of the protective plate away from the bus assembly.

[0028] In a possible implementation, the battery module further includes a shell having an open end, and the bracket assembly enters the shell from the open end; wherein the circuit board and the busbar assembly are both disposed in the shell.

[0029] In a possible implementation, a slide rail is provided on the inner side wall of the shell, and the bracket assembly is slidably connected to the shell via the slide rail.

[0030] In a possible implementation, the bracket assembly includes a cover, which is embedded in the open end and connected to the bracket assembly.

[0031] In a possible implementation manner, the cover is provided with a mounting through hole and a plurality of energy absorbing through holes along the first direction, and the mounting through hole is used for mounting the wire harness.

[0032] In a possible implementation manner, the sealing cover is provided with a sealing portion, and the sealing cover is sealedly connected to the housing via the sealing portion.

[0033] In a possible implementation, a glue flow groove is provided between the sealing portion and the sealing cover, the glue flow groove is filled with a second glue liquid, and the sealing cover is connected to the shell through the second glue liquid.

[0034] In a possible implementation manner, a ring is provided along a circumferential direction of the cover, and the ring is respectively connected to the shell and the cover.

[0035] In a possible implementation, the bracket assembly also includes two side plates connected to the support plate, the two side plates are arranged on both sides of the support plate along the second direction, and the side plates are used to support the circuit board; one of the side plates is connected to the cover.

[0036] In a possible implementation, the side plate includes a first part, a second part, and a third part that are connected in sequence, the first part and the third part are both bent relative to the second part, and the first part and the third part are respectively connected to the support plate;

[0037] Wherein, a first positioning portion is arranged on the first part, a second positioning portion is arranged on the circuit board, and the first positioning portion and the second positioning portion are positioned and connected.

[0038] In a possible implementation, the first part is provided with a plurality of first limiting parts, the first limiting parts include a first limiting body and a first limiting wing, the first limiting wing has a fixed end and a free end, the first limiting wing is connected to the first limiting body via the fixed end, and the free end presses the circuit board onto the first part.

[0039] In a possible implementation, the first limiting portion further includes a plurality of first reinforcing ribs disposed on the first limiting body, and the plurality of first reinforcing ribs are arranged along the circumference of the first limiting body and connected to the first portion.

[0040] In a possible implementation, a plurality of second protective pad layers are attached to a side of the other side plate facing away from the support plate.

[0041] In a possible implementation, the bracket assembly includes a second reinforcing rib disposed on the support plate, and the second reinforcing rib is used to support the circuit board.

[0042] In a possible implementation manner, the support plate has a first surface and a second surface along the third direction;

[0043] The protruding structure is arranged on the first surface and / or the second surface, one side of the protruding structure protrudes from the support plate, and the other side of the protruding structure is provided with a concave hole.

[0044] In a second aspect, the present application provides an electronic device, comprising a device body and a battery module as described in the first aspect, wherein the battery module is connected to the device body.

[0045] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0046] The battery module and electronic device provided in the embodiments of the present application utilize a first adhesive to fix the battery cell assembly on the support plate of the bracket assembly in the battery module to prevent the battery cell assembly from rotating, and solves the technical problem of requiring screws to cooperate, avoids damaging the structural strength of the bracket assembly, and reduces the failure risk of the battery module. The use of the first adhesive can reduce the operation time of materials and production lines, which is in line with the cost reduction concept. The support plate is a single-plate structure and will not occupy too much space inside the battery module, thereby simplifying the complexity of the internal structure of the battery module and reducing the overall size of the battery module, thereby improving the energy density of the battery module, facilitating the heat dissipation of the battery module, and extending the service life of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0049] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0050] Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of the structure of the second part provided in the embodiment of the present application;

[0052] Figure 3 A schematic diagram of the structure of a circuit board provided in an embodiment of the present application;

[0053] Figure 4 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0054] Figure 5 for Figure 4 An enlarged schematic diagram of point A is shown;

[0055] Figure 6 for Figure 4 The enlarged schematic diagram of point B is shown;

[0056] Figure 7 An exploded schematic diagram of a battery module provided in an embodiment of the present application;

[0057] Figure 8 for Figure 7 The enlarged schematic diagram of point C is shown;

[0058] Fig. 9 An exploded schematic diagram of a battery cell assembly and a bracket assembly provided in an embodiment of the present application;

[0059] Fig.10 A schematic diagram of the structure of the bracket assembly provided in an embodiment of the present application;

[0060] Fig.11 A schematic diagram of the structure of a wire harness provided in an embodiment of the present application;

[0061] Fig.12 A schematic diagram of the structure of a housing provided in an embodiment of the present application;

[0062] Fig.13 A schematic diagram of the structure of a first bus provided in an embodiment of the present application;

[0063] Fig.14 for Fig.13 The enlarged schematic diagram of point D shown;

[0064] Fig.15 A schematic diagram of the structure of the second bus provided in an embodiment of the present application.

[0065] Description of reference numerals:

[0066] 1. Battery cell assembly; 11. Cylindrical battery cell;

[0067] 2. Bracket assembly; 21. Support plate; 211. Protruding structure; 2111. Arc groove; 2112. Concave hole; 212. First surface; 213. Second surface; 214. Second through hole; 22. Cell hole; 23. Second reinforcing rib; 24. Side plate; 241. First part; 242. Second part; 2421. Reinforcing rib; 2422. Limiting ring; 243. Third part; 244. First positioning part; 245. First limiting part; 2 451. first limiting body; 2452. first limiting wing; 24521. fixed end; 24522. free end; 2453. first reinforcing rib; 25. second protective cushion layer; 26. sealing cover; 261. sealing portion; 262. first cover body; 263. second cover body; 264. glue flow groove; 265. mounting through hole; 2651. boss; 266. energy absorbing through hole; 2661. first energy absorbing hole; 2662. second energy absorbing hole; 27. ring.

[0068] 3. Circuit board; 31. Locking member; 32. First through hole; 33. Heat conducting member; 331. Heat conducting column; 332. Heat conducting cotton; 34. Second positioning portion;

[0069] 4. wire bundle; 41. wire; 42. wire clamp; 421. clamp body; 43. connector;

[0070] 5. Bus assembly; 51. First bus bar; 511. Second connection body; 512. Second bending body; 513. Third connection wing; 514. Connection plate; 515. Convex hull structure; 52. Second bus bar; 521. First connection body; 522. First bending body; 523. First connection wing; 524. Second connection wing;

[0071] 6. protective layer; 61. protective plate; 62. first protective cushion layer; 63. third protective cushion layer;

[0072] 7. Shell; 71. Open end; 72. Slide rail; 721. First rail; 722. Second rail. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0074] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0075] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0076] In the related art, the battery module adopts a double-bracket structure. The internal structure of the battery module is complex, the integration is low, and screws are required to fix it in many places, which greatly affects the stability of the battery module and increases the risk of failure of the battery module. The double-bracket structure has more consumables, and the screws are used for fastening, which further increases the material and production line operation time, which is not in line with the cost reduction concept. In addition, the double-bracket structure occupies a large space inside the battery module, which reduces the energy density of the battery module, is not conducive to the heat dissipation of the battery module, and reduces the service life of the battery module.

[0077] In order to solve the above-mentioned technical problems, the present application provides a battery module, which uses a first adhesive to fix the battery cell assembly on the support plate of the bracket assembly to prevent the battery cell assembly from rotating, and solves the technical problem of requiring screws to cooperate, avoids damaging the structural strength of the bracket assembly, and reduces the failure risk of the battery module. The use of the first adhesive can reduce the operation time of materials and production lines, which is in line with the cost reduction concept. The support plate is a single-plate structure and will not occupy too much space inside the battery module, which simplifies the complexity of the internal structure of the battery module and reduces the overall size of the battery module, thereby improving the energy density of the battery module, facilitating the heat dissipation of the battery module, and extending the service life of the battery module.

[0078] In some exemplary embodiments, Figure 1-Figure 4 As shown, Fig. 9 , Fig.10 A battery module includes a multi-row battery cell assembly 1, a bracket assembly 2 and a first adhesive (not shown in the figure). The multi-row battery cell assembly 1 is fixed to the bracket assembly 2 by the first adhesive to achieve the effect of fixing the battery, reduce the use of components such as screws, avoid damaging the overall structure of the bracket assembly 2, and greatly improve the stability of the battery module.

[0079] The multiple rows of battery cell components 1 are arranged along a first direction (refer to Figure 1 The Z axis shown in FIG. 1 is arranged in sequence, and each row of battery cell components 1 includes a battery cell component 1 along the second direction (refer to FIG. 1 ). Figure 1 The multiple cylindrical battery cells 11 are arranged in sequence along the X-axis (shown), so that the battery module has a higher energy density.

[0080] The support assembly 2 includes a support plate 21 and a plurality of cell holes 22 arranged in an array on the support plate 21. The cylindrical cells 11 are inserted into the cell holes 22 to pre-fix the cylindrical cells 11, thereby achieving the effect of fixing multiple rows of cell assemblies 1 by one support plate 21. The support plate 21 is a single-plate structure, which can reduce consumables and materials, and realize the concept of cost reduction.

[0081] The support plate 21 is along the third direction (refer to Figure 1 A plurality of protruding structures 211 are provided on the Y-axis as shown, and a protruding structure 211 can be provided between a plurality of adjacent battery cell holes 22. Liquid flows into the gap between the corresponding battery cell hole 22 and the cylindrical battery cell 11 through the protruding structure 211 to fix the cylindrical battery cell 11 in the battery cell hole 22 to prevent the cylindrical battery cell 11 from moving horizontally or rotating.

[0082] In order to ensure that the first glue can enter the corresponding gap, for example, the circumferential outer side wall of the protruding structure 211 can be sequentially provided with a plurality of arc-shaped grooves 2111, and the arc-shaped grooves 2111 are matched with the edge of the battery cell hole 22, so that the arc-shaped grooves 2111 and the battery cell hole 22 are closely connected, and the bottom wall of the arc-shaped grooves 2111 and the inner side wall of the battery cell hole 22 are flush or maintain the same horizontal plane. The distribution of the protruding structure 211 is further explained below to facilitate a better understanding of the technical solution in this embodiment.

[0083] In some examples, the battery cell holes 22 are arranged at intervals along the first direction and the second direction, for example, four are arranged along the first direction, and twelve are arranged along the second direction, with four forming a group. A protruding structure 211 is arranged between the four battery cell holes 22, and the circumferential outer wall of the protruding structure 211 is provided with four arc-shaped grooves 2111, and each arc-shaped groove 2111 is matched with the corresponding battery cell hole 22 to realize the connection between the arc-shaped groove 2111 and the battery cell hole 22.

[0084] It should be noted here that the above-mentioned limitation on quantity is only for illustrative purposes and does not constitute a limitation to the present application. The specific circumstances shall prevail.

[0085] Among them, the support plate 21 has a first surface 212 and a second surface 213 along the third direction. The protruding structure 211 can be set on the first surface 212 or on the second surface 213, as long as it can fit with the battery cell hole 22. One side of the protruding structure 211 protrudes from the support plate 21, that is, the arc-shaped groove 2111 is set on one side of the protruding support plate 21, and the other side of the protruding structure 211 is provided with a concave hole 2112, and the concave hole 2112 is flush with the surface of the support plate 21. Taking the protruding structure 211 provided on both the first surface 212 and the second surface 213 as an example, the protruding structure 211 in the protruding first surface 212 and the protruding structure 211 in the protruding second surface 213 are alternately arranged in sequence along the second direction, that is, in the protruding structure 211 provided on the first surface 212, a protruding structure 211 provided on the second surface 213 is sandwiched between two adjacent protruding structures 211 to balance the structural strength of the support plate 21. Similarly, the protruding structures 211 protruding from the first surface 212 and the protruding structures 211 protruding from the second surface 213 may also be alternately arranged in sequence along the first direction, that is, among the protruding structures 211 arranged on the first surface 212, a protruding structure 211 arranged on the second surface 213 is sandwiched between two adjacent protruding structures 211 to balance the structural strength of the support plate 21.

[0086] It can be understood that since the recessed hole 2112 and the raised structure 211 are arranged relative to each other, namely, they are respectively located on the first surface 212 and the second surface 213, that is, in the raised structure 211 arranged on the first surface 212, a recessed hole 2112 is sandwiched between two adjacent raised structures 211, and the structural layout setting mode located on the second surface 213 is the same as or similar to the structural layout setting mode located on the first surface 212, and no further elaboration will be given here.

[0087] The first glue is in liquid state, and the arc-shaped groove 2111 plays a role of guiding flow, so that the first glue flows from the arc-shaped groove 2111 into the gap between the corresponding battery hole 22 and the cylindrical battery cell 11, so as to fix the cylindrical battery cell 11 in the battery hole 22, and prevent the cylindrical battery cell 11 from translating or rotating. The cylindrical battery cell 11 is bonded to the inner wall of the battery hole 22, and the method is simple and easy to operate, and no auxiliary components are required to cooperate, which saves costs and improves assembly efficiency.

[0088] Among them, any two of the first direction, the second direction and the third direction are perpendicular to each other, for example, referring to Figure 1 As shown, the third direction is consistent with the thickness direction of the support plate 21, and its vertical direction is the first direction. The limitation of its direction is only for further understanding of the technical solution in this application, and does not constitute a limitation to this application.

[0089] In some exemplary embodiments, Figure 3-Figure 10As shown, the battery module includes a circuit board 3, a wire harness 4 and two busbar assemblies 5. The circuit board 3 is located on one side of the support plate 21 along the first direction. The circuit board 3 is, for example, laid flat on the upper side of the support plate 21. The circuit board 3 is mounted on the support plate 21 to ensure the stability of the circuit board 3. The circuit board 3 is, for example, a battery management system (BMS), a module for operating and managing the battery cell assembly 1. A plurality of electronic components are integrated on the circuit board 3 to support corresponding functions.

[0090] Exemplarily, a locking member 31 is provided on the circuit board 3, and the circuit board 3 is mounted to the support plate 21 through the locking member 31. The locking member 31 is, for example, a bolt or a screw, and a first through hole 32 is provided on the circuit board 3, and a second through hole 214 is provided on the support plate 21. The locking member 31 passes through the first through hole 32 and is screwed with the second through hole 214 to fix the circuit board 3 on the support plate 21 to prevent the circuit board 3 from shaking. Among them, the second through hole 214 can be, for example, a screw hole to facilitate cooperation with the locking member 31, and the first through hole 32 can be a hole only for passing the locking member 31 to simplify the overall structure, or the first through hole 32 can also be a screw hole to improve the reliability of the locking member 31 when it is installed, which is subject to the actual situation.

[0091] It is understandable that the locking member 31 is not limited to one but may be multiple to improve the reliability of the connection between the circuit board 3 and the support plate 21. The first through hole 32 and the second through hole 214 are arranged in a one-to-one correspondence to facilitate the installation of the locking member 31.

[0092] The bracket assembly 2 includes a second reinforcing rib 23 disposed on the support plate 21, and the second reinforcing rib 23 is used to support the circuit board 3 to balance the circuit board 3 and improve the stability of the circuit board 3. Among them, the support plate 21 is provided with a second through hole 214, which may affect its structural strength. The second reinforcing rib 23 can be disposed close to the second through hole 214 to improve the structural strength of the side around the second through hole 214 and extend the service life of the support plate 21.

[0093] When the circuit board 3 is working, it will generate heat. If the heat is too much, it will affect the performance of the circuit board 3. Therefore, the circuit board 3 in the present application is also provided with a plurality of heat conducting members 33, and the heat conducting members 33 are located on the side of the circuit board 3 away from the support plate 21, so that the heat on the circuit board 3 can be conducted away through the heat conducting members 33. Among them, the circuit board 3 has a metal-oxide-semiconductor field-effect transistor (MOS or MOSFET) area, which generates a relatively obvious amount of heat. A plurality of heat conducting members 33 can be provided for the MOS area, and for example, four heat conducting members 33 are provided separately to achieve heat dissipation at different positions.

[0094] Exemplarily, the heat conducting member 33 includes a heat conducting column 331 and heat conducting cotton 332, and the heat conducting cotton 332 is connected to the circuit board 3 through the heat conducting column 331. The heat conducting column 331 is in direct contact with the circuit board 3 to achieve rapid heat conduction. The heat conducting cotton 332 is arranged on the heat conducting column 331, so that the heat conducting cotton 332 can not only conduct heat, but also play a buffering role. If the battery module is covered with a shell 7, the shell 7 can effectively avoid direct contact with the heat conducting column 331, reducing the heat dissipation structure such as the heat dissipation aluminum plate installed on the circuit board 3 in the related art, saving costs, and the heat dissipation effect is better, ensuring the stability of the battery module, and extending the service life of the battery module.

[0095] In this embodiment, if Figure 3-Figure 15 As shown, two busbar assemblies 5 are arranged on both sides of the support plate 21 along the third direction, and the battery cell assembly 1 is electrically connected to the circuit board 3 through the busbar assemblies 5, wherein one busbar assembly 5 is, for example, attached to the head end of the battery cell assembly 1, and the other busbar assembly 5 is, for example, attached to the tail end of the battery cell assembly 1. The busbar assembly 5 can be connected to the circuit board 3 by welding, for example, to improve the reliability of the connection.

[0096] Exemplarily, each busbar assembly 5 includes, for example, a first busbar 51 and a plurality of second busbars 52. The first busbar 51 and the plurality of second busbars 52 have different shapes to achieve different functions. For example, the first busbar 51 extends along a first direction so that the first busbar 51 is electrically connected to the four cylindrical cells 11 located at the edge, respectively. The first busbar 51 is used to pass the total current, so a composite structure can be used to meet the large current passing.

[0097] The first busbar 51, for example, includes a second connection body 511, a second bending body 512, a third connection wing 513, a plurality of connection plates 514 and a plurality of convex structures 515. The third connection wing 513, for example, can be electrically connected to the circuit board 3 by welding to complete the information collection and overcurrent of the battery cell assembly 1. The third connection wing 513 is connected to the second connection body 511 through the second bending body 512, and the second connection body 511 extends along the first direction to cover the corresponding four cylindrical battery cells 11. Among them, the second bending body 512 is bent relative to the second connection body 511 and is in an arc shape to change the extension path of the first busbar 51, so that the second connection body 511 is connected to the cylindrical battery cell 11, and the third connection wing 513 is connected to the circuit board 3. And the arc shape is in a U shape, which can avoid the circuit board 3, solve the problem of production line welding pressing, facilitate the inspection of solder joints, and ensure the reliability of welding.

[0098] Every two adjacent convex structures 515 are arranged on a connecting plate 514, and the connecting plate 514 is fixedly connected to the second connecting body 511. The connecting plate 514 is located on the side of the second connecting body 511 close to the cylindrical battery cell 11, and the convex structure 515 is located on the side of the connecting plate 514 away from the second connecting body 511, so as to facilitate electrical connection with the corresponding cylindrical battery cell 11. The convex structure 515 and the connecting plate 514 jointly bear the overcurrent, and the problem of insufficient overcurrent will not occur. The convex structure 515 can avoid the risk of the current on the first bus 51 directly flowing to the cylindrical battery cell 11, ensuring the safe and stable operation of the cylindrical battery cell 11 and reducing the risk of failure.

[0099] Exemplarily, a plurality of second busbars 52 are sequentially arranged along the second direction and electrically connected to the corresponding cylindrical cells 11. The second busbars 52 play the role of series-parallel connection and signal transmission. The second busbars 52 can be connected to a single column of cylindrical cells 11 to achieve a series connection effect, or can be connected to multiple columns of cylindrical cells 11 at the same time to achieve a parallel connection effect.

[0100] The series connection mode is that the second busbar 52 extends along the first direction and is connected to the four cylindrical cells 11. In the series connection mode, for example, each second busbar 52 extends along the first direction, and each second busbar 52 includes a first connection body 521, a first bending body 522, a first connection wing 523 and a plurality of second connection wings 524. The first connection wing 523 is electrically connected to the circuit board 3 by welding. The first bending body 522 is connected to the first connection body 521 through the first connection wing 523. The first bending body 522 is bent relative to the first connection body 521 and is in an arc shape. The arc shape is U-shaped, which can avoid the circuit board 3, solve the problem of production line welding and pressing, and ensure the reliability during welding.

[0101] Multiple second connection wings 524 are respectively connected to the first connection body 521. For example, there are eight second connection wings 524. The second connection wings 524 are symmetrically arranged on both sides of the first connection body 521. Each second connection wing 524 is electrically connected to the corresponding cylindrical battery cell 11 to achieve parallel connection.

[0102] Since the first bus 51 is used to pass the total current, its structural design is relatively complex, while the structural design of the second bus 52 is relatively simple, as long as the effects of series-parallel connection and signal transmission are met.

[0103] The two ends of the cylindrical battery cell 11 are respectively the positive electrode and the negative electrode, and the two busbars 5 are respectively connected to the positive electrode and the negative electrode of the cylindrical battery cell 11 in a one-to-one correspondence, so as to realize the conductivity of the battery cell assembly 1, and then charge and discharge can be performed. The first busbar 51 and the second busbar 52 avoid the problem of insufficient overcurrent when a single busbar is used, and avoid overheating of the busbar assembly 5, which affects the operation of the cylindrical battery cell 11. The first busbar 51 and the second busbar 52 can be connected to the circuit board 3 by welding, without the need for the wire harness in the related technology to transmit current, and the connection is more reliable, effectively reducing the operation process.

[0104] In this embodiment, if Figure 3-Figure 10 As shown, the battery module further includes two protective layers 6, which are attached to the corresponding busbar components 5 to provide shockproof protection for the battery module and improve the safety of the battery module.

[0105] Exemplarily, the protective layer 6 includes, for example, a protective plate 61 and a plurality of first protective cushion layers 62 . The protective plate 61 is attached to the bus assembly 5 , and the plurality of first protective cushion layers 62 are respectively attached to a side of the protective plate 61 facing away from the bus assembly 5 .

[0106] The protective plate 61 is, for example, foam, so that the protective plate 61 has compression deformation resistance, can provide shock protection for the battery module, and also has flame retardancy, safety, antistatic, etc., and can be used in a variety of temperature ranges. The protective plate 61 is attached to the bus assembly 5, which can protect the bus assembly 5 and the cylindrical battery cell 11 and extend their service life. Among them, the protective plate 61 is, for example, a flat plate, which can be laid flat to cover all the first bus bars 51 and the second bus bars 52, thereby improving the protection effect.

[0107] The first protective pad layer 62 is, for example, a silicone pad, which has good elasticity and softness, can effectively block impact and vibration, and the silicone pad has a smooth surface, which can reduce the friction between the protective plate 61 and the shell 7 of the battery module, effectively preventing the bus assembly 5 from colliding or sliding during movement, and protecting the bus assembly 5 from damage. The shell 7 is described in detail in the following embodiments. For example, multiple first protective pad layers 62 can be respectively arranged near the corners of the protective plate 61 to provide balanced and stable support.

[0108] The protective layer 6 further includes a third protective cushion layer 63, which is sandwiched between the side plate 24 and the protective plate 61. The third protective cushion layer 63 is a silicone pad, which has good elasticity and softness and can effectively block impact and vibration. The side plate 24 is provided with a limiting ring 2422, and the third protective cushion layer 63 is embedded in the limiting ring 2422 to limit the installation, achieve quick installation, and avoid the displacement of the third protective cushion layer 63.

[0109] In this embodiment, if Figure 7-Figure 11 As shown, one end of the wire bundle 4 is electrically connected to the circuit board 3, and the other end of the wire bundle 4 is connected to the main board of the electronic device to achieve conduction.

[0110] The wire harness 4, for example, includes multiple wires 41, a wire clamp 42 and at least one connector 43. One end of the multiple wires 41 is electrically connected to the circuit board 3 by welding to improve the reliability of the connection. The other end of the wire 41 passes through the wire clamp 42 and is connected to the connector 43. The connector 43 can be one, two, or three. The wire 41 is connected to the corresponding connector 43 to facilitate plugging into the mainboard of the electronic device to achieve the corresponding function.

[0111] The wire hoop 42 and the wire 41 form a bond to achieve storage and arrangement, avoiding clutter and affecting the overall structural layout. The wire hoop 42 is made of silicone material, for example, so that it has good buffering properties and can effectively prevent the wire 41 from damaging the circuit board 3 during the pulling process.

[0112] The wire clamp 42 includes a multi-layer clamp body 421, which is stacked in sequence. The sizes of the multi-layer clamp bodies 421 can be the same or different. For example, the multi-layer clamp body 421 on the outside is larger than the multi-layer clamp body 421 on the middle side to improve its buffer strength. Or the size of the multi-layer clamp body 421 on one side of the circuit board 3 is larger than the size of the multi-layer clamp body 421 on the side away from the circuit board 3, so as to improve the restraint force on the wire 41 and prevent the wire 41 from detaching from the circuit board 3 when the wire 41 is severely pulled. Among them, the multi-layer clamp body 421 is, for example, but not limited to, three layers, etc., which shall be subject to actual conditions.

[0113] In some exemplary embodiments, Figure 4-Figure 12 As shown, the battery module also includes a shell 7, and the shell 7 is covered on the outside of the bracket assembly 2. The shell 7 can wrap the battery cell assembly 1, the bracket assembly 2, the circuit board 3, the wire harness 4 and the two bus assemblies 5, etc., to protect the interior of the battery module and achieve the flatness of the appearance of the battery module. Among them, the wire harness 4 and can pass through the shell 7 to facilitate connection with the motherboard of the electronic device. The shell 7 is made of metal material, for example, to improve the aesthetics and reliability of the battery module, avoid safety hazards when the battery module falls or impacts, and ensure that the system of the battery module can operate safely and stably while effectively reducing costs. The metal material is, for example, aluminum material, which has a better heat dissipation effect and avoids excessive temperature, which affects the overall performance of the battery module.

[0114] Exemplarily, the shell 7 has an open end 71, and the bracket assembly 2 enters the shell 7 from the open end 71 to shield and isolate the bracket assembly 2, protect it, improve the overall stability of the battery module, avoid shaking or collision of the battery cell assembly 1 inside, and extend the service life of the battery module.

[0115] The heat on the circuit board 3 can be transferred to the housing 7 through the heat conducting member 33, and the housing 7 exchanges heat with the cold air in the air to achieve the purpose of heat dissipation. The inner top wall of the housing 7 is in contact with the heat conducting cotton 332 of the heat conducting member 33, which can play a buffering role, prevent the heat conducting column 331 from directly contacting the housing 7, protect the heat conducting column 331 and the housing 7, reduce the need to install a heat dissipation aluminum plate in the related art, reduce costs, and achieve better heat dissipation effect, thereby ensuring the stability and service life of the battery module.

[0116] In this embodiment, if Fig.12 As shown, the inner wall of the shell 7 is provided with a slide rail 72, and the bracket assembly 2 is slidably connected to the shell 7 through the slide rail 72 to ensure that the battery module is installed along a preset track to avoid deviation.

[0117] Exemplarily, the slide rail 72 includes a first rail 721, and the first rail 721 is arranged on an inner wall surface of the housing 7 in the third direction, that is, Figure 1 The bottom surface shown. The first track 721, for example, includes two parallel convex strips, and the two convex strips are arranged at intervals. When installing the bracket assembly 2, the support plate 21 of the bracket assembly 2 can be clamped between the two convex strips, and the support plate 21 acts as a slide plate. When the bracket assembly 2 is pushed by an external force, the bracket assembly 2 can completely enter the shell 7 along the first track 721. Alternatively, the slide rail 72, for example, also includes a second track 722, and the second track 722 is arranged on the inner wall surface of the shell 7 in the second direction, that is, the side wall surface opposite to the opening end 71. The second track 722 can also be composed of two convex strips. The second track 722 limits the bracket assembly 2 in the third direction to prevent it from tilting, etc. The first track 721 and the second track 722 are connected to form an L-shaped slide rail 72 together, which restricts the bracket assembly 2 in both directions and improves the accuracy of the bracket assembly 2 during installation.

[0118] It should be noted that the shell 7 is, for example, rectangular, and its edges and corners may be rounded to prevent the edges and corners from being too hard and colliding with other structures, thereby preventing damage.

[0119] In some exemplary embodiments, Figure 4-Figure 12As shown, the bracket assembly 2 includes a cover 26. The bracket assembly 2 enters the shell 7 from the open end 71. The cover 26 is embedded in the open end 71. The cover 26 acts as a side shell to seal the shell 7 to prevent the interior from being exposed and affecting the safety of the battery module. The cover 26 is connected to the bracket assembly 2 to improve the overall stability of the battery module, prevent the battery cell assembly 1 from shaking or colliding inside, and extend the service life of the battery module.

[0120] The cover 26 and the open end 71 of the shell 7 can be sealed, for example, to improve the safety of the battery module, prevent the internal part of the battery from being affected by the external environment, prevent moisture, dust or chemicals from corroding and damaging the internal part of the battery, and improve the service life and stability of the battery module. For example, the circumferential outer wall of the cover 26 is provided with a sealing portion 261, and the sealing portion 261 is, for example, a rubber ring. The rubber ring can be deformed when compressed to fill the gap between the cover 26 and the shell 7 to improve the sealing effect. The rubber ring has a high hardness and good wear resistance and high temperature resistance, so that the sealing portion 261 has a long life and avoids its failure. It can be understood that the above-mentioned rubber ring can be one or more, and the multiple rubber rings are arranged at intervals to further improve the sealing effect.

[0121] For example, the cover 26 includes a first cover 262 and a second cover 263, wherein the cross-sectional area of ​​the first cover 262 is larger than the cross-sectional area of ​​the second cover 263, the second cover 263 is embedded in the opening end 71, and the first cover 262 is butted against the housing 7 to ensure the flatness of the appearance of the battery module. The sealing portion 261 is disposed on the second cover 263.

[0122] In this embodiment, if Figure 5 As shown, there is a glue flow groove 264 between the sealing portion 261 and the cover 26. The glue flow groove 264 is, for example, arranged on the second cover body 263 of the cover 26. The glue flow groove 264 is filled with a second glue liquid. The cover 26 is connected to the shell 7 through the second glue liquid, thereby further improving the reliability of the connection between the cover 26 and the shell 7 and preventing the cover 26 from loosening.

[0123] The sealing part 261 can realize the first layer of waterproof function, the second glue can realize the second layer of waterproof function, and the sealing part 261 and the second glue realize the double sealing of the shell 7, further ensuring the sealing ability of the shell 7 and avoiding sealing failure. The sealing setting helps to maintain the pressure balance inside the battery module and prevent the pressure accumulation caused by temperature changes or reactions during use, thereby protecting the structural integrity and stability of the battery module and improving the overall protection performance of the battery module.

[0124] In this embodiment, if Figure 1As shown, a ring 27 is provided along the circumferential direction of the cover 26, and the ring 27 is connected to the housing 7 and the cover 26 respectively to block or block the gap or gap between the cover 26 and the housing 7, further improving the sealing performance and waterproof performance. Among them, the ring 27 is, for example, an insulating flame-retardant plastic sheet made of polycarbonate (PC) material, so that it has good impact resistance, heat resistance, low water absorption, excellent dielectric properties and good dimensional stability, effectively preventing deformation, failure, short circuit and leakage, and improving the safety factor of the battery module.

[0125] In this embodiment, if Figure 1 , Figure 7 As shown, the cover 26 is provided with an installation through hole 265 and a plurality of energy absorption through holes 266 along the first direction, and the installation through hole 265 is used to install the wire harness 4. The installation through hole 265 penetrates the cover 26 along the first direction to ensure the normal installation of the wire harness 4, and after the wire harness 4 is installed, it can also be glued to improve its sealing performance. The inner wall of the installation through hole 265 is provided with a multi-layer boss 2651, for example, so as to cooperate with the multi-layer hoop body 421 of the wire hoop 42. The multi-layer hoop body 421 can be correspondingly embedded in the multi-layer boss 2651, and each layer of the hoop body 421 corresponds to each layer of the boss 2651 one by one to improve the reliability of the connection.

[0126] A plurality of energy-absorbing through holes 266 are provided on the cover 26 to protect the battery module and reduce the impact when it falls. When it falls and collides, the energy-absorbing through holes 266 can absorb a part of the potential energy and reduce the damage to the battery module.

[0127] Exemplarily, the energy absorption through hole 266 includes, for example, a first energy absorption hole 2661, which penetrates the cover 26 along the first direction, and a plurality of first energy absorption holes 2661 may be provided, and are sequentially distributed on the cover 26 along the second direction and the third direction. The first energy absorption hole 2661 may be, for example, a polygonal shape such as a circle, a pentagon, or a hexagon, which is subject to the actual situation. Alternatively, the energy absorption through hole 266 may also include a second energy absorption hole 2662, which extends along the second direction, and a plurality of second energy absorption holes 2662 may be provided, and the plurality of second energy absorption holes 2662 are sequentially distributed on the second cover body 263 of the cover 26 along the third direction. Alternatively, the energy absorption hole 266 includes a first energy absorption hole 2661 and a second energy absorption hole 2662, and the arrangement is the same as above, and no further description is given. The cover 26 is connected to the bracket assembly 2, and the cover 26 is provided with double energy absorption holes, so that the first energy absorption hole 2661 and the second energy absorption hole 2662 can improve the potential energy conversion efficiency when the battery module falls, and avoid cracks in the bracket assembly 2 or the shell 7 when the battery module falls, thereby improving the integration and safety of the battery module. Among them, the second energy absorption hole 2662 can also be a polygonal shape such as a circle, a pentagon, or a hexagon, which shall be subject to the actual situation.

[0128] In some exemplary embodiments, Figure 4-Figure 10 As shown, the bracket assembly 2 also includes two side plates 24 connected to the support plate 21. The two side plates 24 are arranged on both sides of the support plate 21 along the second direction. The side plates 24 can support the circuit board 3 and improve the stability of the circuit board 3. One of the side plates 24 is connected to the cover 26 to improve the stability of the bracket assembly 2, and when the battery module falls, its potential energy can be transferred to the cover 26.

[0129] Among them, the support plate 21 and the side plate 24 can be integrally formed to improve the reliability of the connection, and the support plate 21 extends along the second direction, and the side plate 24 extends along the first direction, so that the cross section of the side plate 24 is perpendicular to the cross section of the support plate 21, and the support plate 21 and the side plate 24 are constructed in an "I" shape, so that the bracket assembly 2 has good stability and balance, and provides stable support for the circuit board 3. The support plate 21 and the side plate 24 constitute an integrated bracket of the bracket assembly 2, which improves the integration of the battery module and effectively simplifies the number of parts.

[0130] In this embodiment, if Fig. 9 , Fig.10 As shown, each side plate 24 includes a first portion 241, a second portion 242 and a third portion 243 connected in sequence, the first portion 241 and the third portion 243 are bent relative to the second portion 242, and the first portion 241 and the third portion 243 are respectively connected to the support plate 21.

[0131] The first part 241 acts as an upper support plate, and the first part 241 can support the circuit board 3, and the third part 243 acts as a lower support plate, and the third part 243 can provide support for the bracket assembly 2 to achieve stability of the bracket assembly 2. A plurality of reinforcing ribs 2421 are provided on the second part 242 to enhance the strength of the second part 242 and extend the service life of the second part 242.

[0132] The first portion 241 is provided with a first positioning portion 244 , and the circuit board 3 is provided with a second positioning portion 34 . The first positioning portion 244 and the second positioning portion 34 are limitedly connected to limit the movement of the circuit board 3 to prevent the circuit board 3 from deviating from the installation position and affecting the connection effect.

[0133] The first positioning portion 244 is, for example, a positioning column or a positioning plate, as long as it is a protruding structure, and the second positioning portion 34 is, for example, a notch, and the second positioning portion 34 is plugged into the first positioning portion 244 to form a limit. In addition to the limit function, the first positioning portion 244 can also achieve a positioning function, so that the circuit board 3 can be quickly positioned and installed through the second positioning portion 34 and the first positioning portion 244.

[0134] In this embodiment, if Fig. 9 , Fig.10 As shown, the first part 241 is provided with a plurality of first limiting parts 245, the first limiting part 245 includes a first limiting body 2451 and a first limiting wing 2452, the first limiting wing 2452 has a fixed end 24521 and a free end 24522, the first limiting wing 2452 is connected to the first limiting body 2451 via the fixed end 24521, and the free end 24522 presses the circuit board 3 onto the first part 241 to limit the movement of the circuit board 3 and prevent the circuit board 3 from deviating from the installation position and affecting the connection effect.

[0135] Among them, two first limiting portions 245 are provided on each first portion 241, and the two first limiting portions 245 are arranged at intervals, and the first limiting portions 245 on both sides press the circuit board 3 to uniformly press the circuit board 3. Of course, it can be understood that each first portion 241 can also be provided with one first limiting portion 245, and the first limiting portions 245 on both sides press the circuit board 3, or three first limiting portions 245 are provided on each first portion 241, which shall be subject to the actual situation.

[0136] In this embodiment, if Fig. 9 , Fig.10As shown, the first position limiting portion 245 further includes a plurality of first reinforcing ribs 2453 disposed on the first position limiting body 2451, and the plurality of first reinforcing ribs 2453 are arranged along the circumference of the first position limiting body 2451 and connected to the first portion 241. The first reinforcing ribs 2453 are, for example, inclined ribs to improve the strength and stability of the first position limiting portion 245.

[0137] The first limiting portion 245 is, for example, an integrally formed structure, so that the overall structure of the first limiting portion 245 tends to be stable and has good strength, thereby effectively extending the service life.

[0138] In this embodiment, if Figure 7-10 As shown, a plurality of second protective pad layers 25 are attached to the side of the other side plate 24 away from the support plate 21, that is, attached to the second part 242 of the side plate 24, sandwiched between the shell 7 and the second part 242. The second protective pad layer 25 is, for example, a silicone pad, which has good elasticity and softness, can effectively link shock and vibration, and the silicone pad has a smooth surface, which can reduce the friction between the second part 242 and the shell 7, effectively preventing the bracket assembly 2 from colliding or sliding during movement, and protecting the bracket assembly 2 and the battery cell assembly 1 from damage. For example, multiple second protective pad layers 25 can be respectively arranged near the corners of the second part 242 to provide balanced and stable support.

[0139] The present application also proposes an electronic device, such as a car, an electric bicycle, a scooter, a motorcycle, etc. The electronic device includes a device body and a battery module as in any of the above embodiments. The device body is provided with a main board, electronic components, etc., and the battery module is connected to the main board to facilitate conductivity.

[0140] The battery module in this application has a higher degree of integration as a whole package, and the space between the single cylindrical cells is larger, which is conducive to the heat dissipation of the battery module. The bracket assembly is an integrated bracket, which solves the technical problem that the double brackets in the related art need to be connected and fixed by screws, reduces the number of parts, and reduces material costs. The cylindrical cell and the bracket assembly are fixed by the first glue, which can completely limit the rotation of the cylindrical cell, improving the safety and reliability of the product.

[0141] The cover is provided with multiple energy-absorbing through holes, and when connected to the shell, a multiple waterproof structure is designed to ensure the stability and safety of the battery module. The slide rail design on the shell plays a good guiding role, making it easy for the battery module to enter the shell.

[0142] The first bus bar in the bus assembly adopts a composite structure to realize the overcurrent design, saving the space occupied by the bus assembly. The second bent body of the first bus bar is arc-shaped, which improves the reliability during welding, reduces the safety risk of the battery module, and increases the overall service life of the battery module.

[0143] The wire hoop in the wire harness has a multi-layer hoop body and multiple protective pads to protect the circuit board and wires, reducing the risk of product failure. In addition, a heat conductor is set on the circuit board to transfer the heat on the circuit board to the housing, thereby increasing the service life of the battery module.

[0144] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0145] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0146] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A battery module, characterized in that: include: A plurality of rows of battery cell assemblies are sequentially arranged along a first direction, and each row of the battery cell assemblies comprises a plurality of cylindrical battery cells sequentially arranged along a second direction; A bracket assembly, comprising a support plate and a plurality of battery cell holes arrayed on the support plate, wherein the cylindrical battery cells are inserted into the corresponding battery cell holes, so that one support plate can fix multiple rows of battery cell assemblies; wherein the support plate is provided with a plurality of protrusion structures along a third direction, and one protrusion structure is provided between a plurality of adjacent battery cell holes; and A first glue solution flows into the gap between the corresponding battery cell hole and the cylindrical battery cell through the protruding structure to fix the cylindrical battery cell in the battery cell hole; Any two of the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is consistent with the thickness direction of the support plate.

2. The battery module according to claim 1, characterized in that: The circumferential outer side wall of the protrusion structure is sequentially provided with a plurality of arc-shaped grooves; The arc-shaped groove fits with the edge of the battery cell hole, so that the first glue can enter into the gap between the corresponding battery cell hole and the cylindrical battery cell along the arc-shaped groove.

3. The battery module according to claim 1, characterized in that: The battery module comprises a circuit board, a wire harness and two busbar assemblies, the circuit board is located on one side of the support plate along the first direction, and the circuit board is mounted to the support plate; The two busbar assemblies are arranged on both sides of the support plate along the third direction, the battery cell assembly is electrically connected to the circuit board through the busbar assemblies, and the wire harness is electrically connected to the circuit board.

4. The battery module according to claim 3, characterized in that: A locking piece is provided on the circuit board, and the circuit board is mounted to the support plate through the locking piece.

5. The battery module according to claim 3, characterized in that: A plurality of heat-conducting members are arranged on the circuit board, and the heat-conducting members are located on a side of the circuit board away from the supporting plate.

6. The battery module according to claim 5, characterized in that: The heat-conducting component includes a heat-conducting column and heat-conducting cotton, and the heat-conducting cotton is connected to the circuit board through the heat-conducting column.

7. The battery module according to claim 3, characterized in that: The wire harness comprises a wire clamp, at least one connector and a plurality of wires, one end of the plurality of wires is electrically connected to the circuit board, and the other end of the wires passes through the wire clamp and is connected to the connector.

8. The battery module according to claim 7, characterized in that: The wire clamp comprises a multi-layer clamp body, the multi-layer clamp body is stacked in sequence, and the sizes of the multi-layer clamp body are the same or different.

9. The battery module according to claim 3, characterized in that: Each of the busbar assemblies comprises a first busbar and a plurality of second busbars; A first bus bar extends along the first direction, and the first bus bar is electrically connected to the cylindrical battery core located at the edge; A plurality of the second bus bars are arranged in sequence along the second direction and are electrically connected to the corresponding cylindrical battery cells.

10. The battery module according to claim 9, characterized in that: Each of the second busbars comprises a first connecting body, a first bending body, a first connecting wing and a plurality of second connecting wings, wherein the plurality of second connecting wings are respectively connected to the first connecting body, and the second connecting wing is electrically connected to the corresponding cylindrical battery core; The first bending body is connected to the first connecting wing and the first connecting body respectively, and the first connecting wing is electrically connected to the circuit board; wherein the first bending body is bent relative to the first connecting body and is in an arc shape.

11. The battery module according to claim 9, characterized in that: The first busbar comprises a second connecting body, a second bending body, a third connecting wing, a plurality of connecting plates and a plurality of convex hull structures, the second bending body is respectively connected to the third connecting wing and the second connecting body, and the third connecting wing is electrically connected to the circuit board; wherein the second bending body is bent relative to the second connecting body and is in an arc shape; Every two adjacent convex structures are arranged on one connecting plate, the connecting plate is fixedly connected to the second connecting body, and the convex structure is electrically connected to the corresponding cylindrical battery core.

12. The battery module according to claim 3, characterized in that: The battery module also includes two protective layers, and the protective layers are attached to the corresponding busbar components.

13. The battery module according to claim 12, characterized in that: The protective layer includes a protective plate and a plurality of first protective pad layers. The protective plate is attached to the busbar assembly, and the plurality of first protective pad layers are respectively attached to a side of the protective plate away from the busbar assembly.

14. The battery module according to claim 3, characterized in that: The battery module also includes a shell having an open end, and the bracket assembly enters the shell from the open end; wherein the circuit board and the busbar assembly are both arranged in the shell.

15. The battery module according to claim 14, characterized in that: The inner side wall of the shell is provided with a slide rail, and the bracket assembly is slidably connected with the shell through the slide rail.

16. The battery module according to claim 14, characterized in that: The support assembly comprises a cover, which is embedded in the open end and connected to the support assembly.

17. The battery module according to claim 16, characterized in that: The cover is provided with a mounting through hole and a plurality of energy absorbing through holes along the first direction, and the mounting through hole is used for mounting the wire harness.

18. The battery module according to claim 16, characterized in that: The sealing cover is provided with a sealing portion, and the sealing cover is sealedly connected to the housing through the sealing portion.

19. The battery module according to claim 18, characterized in that: A glue flow groove is provided between the sealing portion and the sealing cover, the glue flow groove is filled with a second glue liquid, and the sealing cover is connected to the shell through the second glue liquid.

20. The battery module according to claim 16, characterized in that: Rings are arranged along the circumferential direction of the cover, and the rings are respectively connected to the shell and the cover.

21. The battery module according to claim 16, characterized in that: The bracket assembly also includes two side plates connected to the support plate, the two side plates are arranged on both sides of the support plate along the second direction, and the side plates are used to support the circuit board; one of the side plates is connected to the cover.

22. The battery module according to claim 21, characterized in that: The side plate comprises a first part, a second part and a third part which are connected in sequence, the first part and the third part are both bent relative to the second part, and the first part and the third part are respectively connected to the support plate; Wherein, a first positioning portion is arranged on the first part, a second positioning portion is arranged on the circuit board, and the first positioning portion and the second positioning portion are positioned and connected.

23. The battery module according to claim 22, characterized in that: The first part is provided with a plurality of first limiting parts, the first limiting part includes a first limiting body and a first limiting wing, the first limiting wing has a fixed end and a free end, the first limiting wing is connected to the first limiting body through the fixed end, and the free end presses the circuit board onto the first part.

24. The battery module according to claim 23, characterized in that: The first limiting portion further includes a plurality of first reinforcing ribs disposed on the first limiting body, wherein the plurality of first reinforcing ribs are arranged along the circumference of the first limiting body and connected to the first portion.

25. The battery module according to claim 21, characterized in that: A plurality of second protective pad layers are attached to a side of the other side plate facing away from the support plate.

26. The battery module according to claim 3, characterized in that: The bracket assembly includes a second reinforcing rib disposed on the support plate, and the second reinforcing rib is used to support the circuit board.

27. The battery module according to claim 1, characterized in that: The support plate has a first surface and a second surface along the third direction; The protruding structure is arranged on the first surface and / or the second surface, one side of the protruding structure protrudes from the support plate, and the other side of the protruding structure is provided with a concave hole.

28. An electronic device, characterized in that: It comprises a device body and a battery module as described in any one of claims 1 to 27, wherein the battery module is connected to the device body.

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