Battery module and battery pack with same

Abstract

The utility model discloses a battery module and a battery pack with the same, and the battery module comprises a plurality of battery monomers which are arranged in a stacked manner along a first direction; the side plates are arranged on the two sides of the plurality of single batteries in the first direction, and each side plate is provided with a fixing part used for being connected with a box body of a battery pack; and the buffer parts are arranged between the side plates and the battery monomers. According to the battery module disclosed by the utility model, the side plates and the buffer pieces are arranged on the two sides of the plurality of battery monomers, and the side plates are directly connected with the box body, so that the tolerance difference among the side plates, the buffer pieces and the battery monomers in different battery modules is small, and expansion force generated when the temperature of the battery modules rises acts on the side plates through the buffer pieces; the difference value of extrusion force applied to the end battery monomers in different battery modules can be reduced, so that the consistency of different battery modules in the battery pack is improved.

Description

Technical Field

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

[0002] At present, a design in which multiple battery cells are stacked to form a battery module, and then the battery module is assembled into a box to form a battery pack is widely adopted. In related technologies, multiple mounting grooves are formed on the box of the battery pack to install the battery module. The tolerances of the multiple battery cells after assembly are accumulated on the battery cells at the end, which will cause the gap between the end battery cells and the inner wall of the mounting groove in different battery modules to be quite different. In this way, when the battery module expands due to heat, the squeezing force of the inner wall of the mounting groove on the end battery cells in different battery modules will be quite different, which will reduce the consistency of different battery modules. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module, which can improve the consistency of a battery pack.

[0004] The utility model also provides a battery pack having the battery module.

[0005] According to the first aspect of the utility model, the battery module includes: a plurality of battery cells, which are stacked along a first direction; a side plate, which is arranged on both sides of the plurality of battery cells in the first direction, and has a fixing portion for connecting to a box body of a battery pack; and a buffer, which is arranged between the side plate and the battery cells.

[0006] According to the battery module of the first aspect of the utility model, the consistency of different battery modules in the battery pack can be improved, and the reliability of the battery pack during operation can be improved.

[0007] According to some embodiments of the utility model, there are multiple fixing parts, and the multiple fixing parts are arranged at intervals along a second direction perpendicular to the first direction. The fixing parts are formed as fixing holes, and the fixing holes penetrate the side panels along the up and down directions. The side panels are fastened to the box body by fasteners passing through the fixing holes.

[0008] According to some embodiments of the utility model, the side plate includes: a plate body and a bushing, the plate body is formed with a through hole that passes through the plate body up and down, the bushing is embedded in the through hole, and the inner side of the bushing defines the fixing hole.

[0009] According to some embodiments of the present invention, the battery module further comprises: a liquid cooling plate, the liquid cooling plate is arranged on the upper side of the plurality of battery cells, and the side plate is fixedly connected to the liquid cooling plate.

[0010] According to some embodiments of the utility model, a bonding area is formed on the upper surface of the side panel, and the bonding area is provided with an adhesive layer, and the side panel is fixedly connected to the liquid cooling plate through the adhesive layer; a glue overflow groove and a glue blocking rib are provided on the upper surface of the side panel, and the glue overflow groove extends along the circumference of the bonding area, and the glue blocking rib is provided on the side of the glue overflow groove away from the bonding area, and in the up and down direction, the upper end of the glue blocking rib is higher than the upper surface of the side panel.

[0011] According to some embodiments of the present invention, a plurality of first rivet holes arranged at intervals are formed on the side plate, and the side plate is riveted and connected to the liquid cooling plate through rivets passing through the first rivet holes.

[0012] According to some embodiments of the present utility model, the side panel includes: a panel body and an insert, the panel body is an injection molded part, the insert is connected to the panel body as a whole by injection molding, and the first rivet hole is formed on the insert.

[0013] According to some embodiments of the utility model, the insert includes: a first plate segment, the first plate segment extends horizontally, the first rivet hole is formed in the first plate segment and penetrates the first plate segment in the up and down direction; a second plate segment, the second plate segment is two and is respectively connected to the two ends of the first plate segment and extends downward, wherein a through hole penetrating in the thickness direction is formed on the second plate segment, and / or a folded edge extending in the horizontal direction is formed at the lower end of the second plate segment.

[0014] According to some embodiments of the utility model, the battery module also includes: a flexible circuit board, which is arranged on a side of the side plate away from the battery cell, the flexible circuit board is riveted to the side plate, a plurality of second rivet holes are formed on the flexible circuit board, a plurality of third rivet holes are formed on the side plate, the flexible circuit board is connected to the side plate through riveting parts passing through the second rivet holes and the third rivet holes; and / or, a busbar, a plurality of binding holes are formed on the side plate, the busbar is bound to the side plate through the binding holes through the binding parts.

[0015] The battery pack according to the second aspect of the present invention comprises: a box body; the battery module according to the first aspect of the present invention, wherein the battery module is arranged in the box body, and the side plate is fixedly connected to the box body through the fixing portion.

[0016] According to the battery pack of the second aspect of the present invention, by providing the battery module according to the first aspect of the present invention, the consistency of different battery modules in the battery pack and the reliability of the battery pack during operation can be improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery module according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the side panel shown in ;

[0020] Figure 3 yes Figure 2 An enlarged view of A shown in FIG.

[0021] Figure 4 yes Figure 3 A schematic diagram of the insert shown in ;

[0022] Figure 5 yes Figure 2 Schematic diagram of the bushing shown in .

[0023] Reference numerals:

[0024] 1000. Battery module;

[0025] 100, side panels;

[0026] 10. Plate body; 11. Third riveting hole; 12. Binding hole; 13. Positioning reference hole;

[0027] 20. Bushing; 21. Fixing hole; 22. Stretching groove; 23. Fastener;

[0028] 30. bonding area; 31. positioning pin;

[0029] 40. Glue overflow groove;

[0030] 50. Rubber retaining ribs;

[0031] 60, insert; 61, first plate segment; 611, first rivet hole; 62, second plate segment; 621, through hole; 622, folded edge;

[0032] 200, battery cell;

[0033] 300, liquid cooling plate;

[0034] 400, flexible circuit board; 410, second riveting hole;

[0035] 500. Busbar. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Reference below Figure 1-Figure 5 A battery module 1000 according to an embodiment of the first aspect of the present invention is described.

[0038] like Figure 1 and Figure 2 As shown, the battery module 1000 according to the first embodiment of the present invention includes: a plurality of battery cells 200, a side plate 100 and a buffer.

[0039] Specifically, the plurality of battery cells 200 are arranged along a first direction (eg Figure 1 The battery packs are stacked in a front-to-rear direction (as shown in FIG), the side plates 100 are disposed on both sides of the plurality of battery cells 200 in the first direction, the side plates 100 have a fixing portion for connecting to a box body of the battery pack, and a buffer is disposed between the side plates 100 and the battery cells 200.

[0040] During the assembly process, the battery module 1000 is first assembled outside the battery pack box, and then the assembled battery module 1000 is loaded into the battery pack box and the fixing part of the side panel 100 is fixedly connected to the box. In this way, the battery module 1000 can be assembled in the battery pack box.

[0041] During the operation of the battery pack, a large amount of heat is generated, which increases the temperature of the battery module 1000. It is understandable that when the temperature of the battery module 1000 increases, the volume of the multiple battery cells 200 increases. In this way, in the first direction, the size of the multiple battery cells 200 after stacking will also increase.

[0042] In this embodiment, by arranging the side plates 100 on both sides of the plurality of battery cells 200 in the first direction, and arranging the buffers between the side plates 100 and the battery cells 200, when the plurality of battery cells 200 are heated and expanded, the battery cells 200 will squeeze the buffers and apply the expansion force to the side plates 100 through the buffers, and the side plates 100 will squeeze the end battery cells 200 through the buffers to resist the expansion force of the plurality of battery cells 200. It can be understood by those skilled in the art that the number of factors affecting the tolerances between the side plates 100, the buffers and the end battery cells 200 is relatively small, so that the difference in tolerances between the side plates 100, the buffers and the battery cells 200 in different battery modules 1000 is relatively small, and the difference in the squeezing force of the side plates 100 on the end battery cells 200 in different battery modules 1000 is also relatively small, thereby improving the consistency of different battery modules 1000 in the battery pack.

[0043] Among them, when the buffer component is deformed, it can offset a part of the deformation of the battery cell 200, thereby reducing the squeezing force of the side plate 100 on the end battery cell 200, and the buffer component can provide protection for the end battery cell 200, avoiding the side plate 100 with higher hardness directly squeezing the end battery cell 200, reducing the probability of the end battery cell 200 being damaged during the operation of the battery pack, thereby improving the reliability of the battery pack during operation.

[0044] According to the battery module 1000 of the embodiment of the first aspect of the utility model, the consistency of different battery modules 1000 in the battery pack can be improved, and the reliability of the battery pack during operation can be improved.

[0045] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the number of the fixing parts is multiple, for example, the fixing parts can be two, three or four, and the multiple fixing parts are arranged along a second direction perpendicular to the first direction (for example Figure 1 The fixing parts are arranged at intervals in the left and right directions shown in the figure, and the fixing parts are formed as fixing holes 21. The fixing holes 21 penetrate the side panels 100 in the up-down direction, and the side panels 100 are fastened to the box body by fasteners 23 passing through the fixing holes 21. By providing a plurality of fixing parts, the plurality of fixing parts can fix the side panels 100 at different positions, thereby improving the reliability of the connection between the side panels 100 and the box body, and can make the force between the side panels 100 and the box body more uniform. The side panels 100 are connected to the box body by fasteners 23 passing through the fixing holes 21, and the connection reliability is high. The operation is convenient and the production efficiency can be improved. Among them, preferably, the plurality of fixing parts are evenly arranged in the second direction, thereby further improving the uniformity of the force between the side panels 100 and the box body.

[0046] In some embodiments of the utility model, in the second direction, the two ends of the battery cell 200 exceed the two ends of the side plate 100, and the size difference between the battery cell 200 and the side plate 100 is 2mm-3mm. For example, the size difference between the battery cell 200 and the side plate 100 can be 2mm, 2.4mm, 2.5mm or 3mm, thereby ensuring that the side plate 100 and the connectors at both ends of the battery cell 200 in the second direction do not interfere with each other. In the process of product design, the size difference between the battery cell 200 and the side plate 100 can be adjusted to meet more product design needs.

[0047] In some embodiments of the present invention, the buffer is a piece of heat-insulating material. Preferably, the buffer is a heat-insulating pad. In this way, the thermal stability of the battery module 1000 can be improved, thereby improving the reliability of the battery pack during operation.

[0048] In some embodiments of the present invention, the thickness of the side panel 100 is 17 mm-22 mm, for example, the thickness of the side panel 100 can be 17 mm, 17.5 mm, 19 mm or 22 mm. Thus, the strength of the side panel 100 can be guaranteed to meet the use requirements. In the process of product design, the thickness of the side panel 100 can be adjusted to meet more product design requirements.

[0049] In some embodiments of the present invention, the height difference between the side plate 100 and the battery cell 200 is 1mm-1.5mm. For example, the height difference between the side plate 100 and the battery cell 200 can be 1mm, 1.2mm or 1.5mm, thereby ensuring that the thickness of the thermal conductive structural adhesive between the side plate 100 and the liquid cooling plate 300 meets the use requirements. During the product design process, the height difference between the side plate 100 and the battery cell 200 can be adjusted to meet more product design requirements.

[0050] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the side plate 100 includes: a plate body 10 and a bushing 20. The plate body 10 is formed with a through hole that passes through the plate body 10 from top to bottom. The bushing 20 is embedded in the through hole, and the inner side of the bushing 20 defines a fixing hole 21. It can be understood that the bushing 20 has a higher strength. By providing the bushing 20, the connection strength between the inner wall of the fixing hole 21 and the fastener 23 can be improved, thereby improving the reliability of the connection between the side plate 100 and the box body.

[0051] Among them, preferably, the thickness of the injection molding material outside the bushing 20 is greater than 2mm, for example, the thickness of the injection molding material outside the bushing 20 can be 2mm, 2.5mm, 3mm or 4mm, so that it can be ensured that the support strength of the plate body 10 to the bushing 20 meets the use requirements, the fixing hole 21 is a threaded hole, and the wall thickness of the fixing hole 21 is 2mm-3mm, for example, the wall thickness of the fixing hole 21 can be 2mm, 2.5mm or 3mm, thereby, it can be ensured that the support strength of the fixing hole 21 meets the use requirements. The fastener 23 is an M6 bolt, and the bushing 20 is a threaded bushing 20. The bolt connection operation is convenient and the cost is low, which can improve production efficiency and reduce production costs. In the process of product design, the material, size or shape of the bushing 20 can be adjusted to meet more product design needs and reduce the difficulty of product design.

[0052] In some embodiments of the present invention, the bushing 20 is a steel material. Preferably, the bushing 20 is a No. 20 high-strength steel material. The steel material has high strength and can meet the support strength requirements of the bushing 20.

[0053] In the vertical direction, both ends of the bushing 20 protrude from both ends of the plate body 10 by at least 0.5 mm, thereby preventing the bolt from contacting the plate body 10 and crushing the surface of the plate body 10 .

[0054] In some embodiments of the utility model, the plate body 10 is an injection molded part, and the bushing 20 is connected to the plate body 10 as a whole by injection molding. The injection molding production efficiency and the consistency of the output product are high. The plate body 10 is produced by the injection molding process and the plate body 10 is connected to the bushing 20, which can improve the production efficiency and improve the consistency of the side plate 100, thereby further improving the consistency of different battery modules 1000. Preferably, the plate body 10 is a PA66+GF30 engineering plastic part, which has high heat resistance and good insulation. Therefore, the reliability of the battery pack during operation can be further improved. The thickness of the plate body 10 is 2.5mm.

[0055] In some embodiments of the present invention, Figure 5 As shown, a plurality of stretching grooves 22 surrounding the bushing 20 are formed on the bushing 20, for example, the stretching grooves 22 may be two, three or four, and when the bushing 20 and the plate body 10 are connected together by injection molding, the injection molding material may penetrate into the stretching grooves 22, thereby improving the reliability of the connection between the bushing 20 and the plate body 10. Preferably, the width of the stretching groove 22 is 2 mm, and the depth is 0.5 mm-0.8 mm, for example, the depth of the stretching groove 22 may be 0.5 mm, 0.6 mm or 0.8 mm, thereby ensuring that the connection strength between the bushing 20 and the plate body 10 meets the use requirements.

[0056] In some embodiments of the present invention, Figure 1 As shown, the battery module 1000 further includes: a liquid cooling plate 300, the liquid cooling plate 300 is arranged on the upper side of the plurality of battery cells 200, and the side plate 100 is fixedly connected to the liquid cooling plate 300. The upper surface of the battery cell 200 is connected to the liquid cooling plate 300, so that the side plate 100 can provide support for the liquid cooling plate 300 on both sides of the plurality of battery cells 200, and the side plate 100 can limit the displacement of the liquid cooling plate 300 relative to the plurality of battery cells 200, thereby improving the structural stability of the battery module 1000 during operation.

[0057] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the upper surface of the side plate 100 is formed with an adhesive area 30, and the adhesive area 30 is provided with an adhesive layer. The side plate 100 is fixedly connected to the liquid cooling plate 300 through the adhesive layer. The adhesive connection operation is convenient, which can improve production efficiency. In addition, the adhesive layer has high thermal conductivity, and the heat on the side plate 100 is efficiently transferred to the liquid cooling plate 300, and the liquid cooling plate 300 has a better cooling effect on the side plate 100. Preferably, the adhesive area 30 and the liquid cooling plate 300 are bonded by a heat-conducting structural adhesive, so that the cooling effect of the liquid cooling plate 300 on the side plate 100 can be further improved.

[0058] In some embodiments of the present invention, the thickness of the adhesive layer is 1.5 mm-2 mm, for example, the thickness of the adhesive layer can be 1.5 mm, 1.6 mm, 1.9 mm or 2 mm, thereby ensuring that the strength of the adhesive connection between the side plate 100 and the liquid cooling plate 300 meets the use requirements.

[0059] like Figure 3 As shown, the upper surface of the side plate 100 is provided with a glue overflow groove 40 and a glue blocking rib 50, the glue overflow groove 40 extends along the circumference of the bonding area 30, and the glue blocking rib 50 is provided on the side of the glue overflow groove 40 away from the bonding area 30, and in the up and down direction, the upper end of the glue blocking rib 50 is higher than the upper surface of the side plate 100. It can be understood that during the assembly process, the glue applied on the bonding area 30 will flow on the surface of the bonding area 30 under the extrusion of the liquid cooling plate 300. By providing the glue overflow groove 40, the glue overflow groove 40 can accommodate the overflowed glue during the assembly process to prevent the overflowed glue from affecting other areas on the battery module 1000. By providing the glue blocking rib 50, the probability of glue overflow between the bonding area 30 and the liquid cooling plate 300 can be reduced, and the glue blocking rib 50 can strengthen the strength of the bonding area 30.

[0060] In some embodiments of the present invention, the depth of the overflow glue groove 40 is 2mm-3mm, and the width of the overflow glue groove 40 is 2.5mm-3mm. For example, the depth of the overflow glue groove 40 can be 2mm, 2.5mm or 3mm, and the width of the overflow glue groove 40 can be 2.5mm, 2.6mm or 3mm. Thus, the capacity of the overflow glue groove 40 can be guaranteed to meet the use requirements.

[0061] In some embodiments of the present invention, Figure 3 As shown, the bonding area 30 is also provided with a positioning pin 31 extending up and down, and a positioning hole is formed on the liquid cooling plate 300, and the positioning pin 31 is matched with the positioning hole, so that during the assembly process, the positioning pin 31 can cooperate with the positioning hole to achieve rapid positioning of the liquid cooling plate 300 and the side plate 100, and after the assembly is completed, the positioning pin 31 cooperates with the positioning hole to block the relative displacement between the side plate 100 and the liquid cooling plate 300, further improving the reliability of the connection between the side plate 100 and the liquid cooling plate 300. Preferably, the outer diameter of the positioning pin 31 is 5mm-7mm, for example, the outer diameter of the positioning pin 31 can be 5mm, 5.5mm, 6mm, 6.2mm or 7mm.

[0062] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, a plurality of first rivet holes 611 arranged at intervals are formed on the side plate 100. For example, the first rivet holes 611 may be three, four or five, and the side plate 100 is riveted to the liquid cooling plate 300 by passing the rivets through the first rivet holes 611. In other words, the side plate 100 may be connected to the liquid cooling plate 300 by riveting and bonding. During the operation of the battery pack, when the plurality of battery cells 200 are heated and expanded, the expansion force acting on the side plate 100 is transmitted to the liquid cooling plate 300 through the riveted joints and the bonded joints. The riveted connection has a high strength, which can improve the reliability of the connection between the side plate 100 and the liquid cooling plate 300. In addition, the riveted connection occupies a small space, which can facilitate the arrangement of the battery module 1000.

[0063] It should be noted that the riveted parts need to avoid the liquid cooling channel in the liquid cooling plate 300. During the assembly process, the bonding area 30 is first bonded to the liquid cooling plate 300, so that the liquid cooling plate 300 and the side plate 100 can be preliminarily positioned to facilitate the riveting operation, and then the riveted parts are passed through the first riveting holes 611 and riveted to the liquid cooling plate 300. Preferably, the side plate 100 and the liquid cooling plate 300 are riveted by blind rivets, and the outer diameter of the blind rivets is 4.8 mm or 5 mm.

[0064] In some embodiments of the utility model, the side panel 100 and the liquid cooling plate 300 are bolted, that is, the side panel 100 can be connected to the liquid cooling plate 300 by bolting and bonding. During the operation of the battery pack, when the multiple battery cells 200 are heated and expanded, the expansion force acting on the side panel 100 is transmitted to the liquid cooling plate 300 through the bolt connection and the bonding. The bolt connection has a high connection strength, which can improve the reliability of the connection between the side panel 100 and the liquid cooling plate 300. During the assembly process, the bonding area 30 is first bonded to the liquid cooling plate 300, so that the liquid cooling plate 300 and the side panel 100 can be preliminarily positioned to facilitate the bolt connection operation, and then the side panel 100 is bolted to the liquid cooling plate 300. Preferably, the side panel 100 is connected to the liquid cooling plate 300 by M5 bolts.

[0065] In some embodiments of the present invention, Figure 2-Figure 4 As shown, the side panel 100 includes: a panel body 10 and an insert 60. The panel body 10 is an injection molded part. The insert 60 is connected to the panel body 10 as a whole by injection molding. The first rivet hole 611 is formed on the insert 60. The injection molding production efficiency and the consistency of the output product are high. The panel body 10 is produced by the injection molding process and the panel body 10 is connected to the insert 60, which can improve the production efficiency and the consistency of the side panel 100, thereby further improving the consistency of different battery modules 1000. Preferably, the panel body 10 is a PA66+GF30 engineering plastic part, which has high heat resistance and good insulation. Therefore, the reliability of the battery pack during operation can be further improved. In the thickness direction of the panel body 10, the thickness of the injection molding material on both sides of the insert 60 is not less than 3mm. For example, the thickness of the injection molding material on both sides of the insert 60 can be 3mm, 3.2mm or 4mm.

[0066] It can be understood that the insert 60 has a relatively high strength. By providing the insert 60 , the strength of the riveted connection between the side plate 100 and the liquid cooling plate 300 can be improved.

[0067] In some embodiments of the present invention, Figure 4 As shown, the insert 60 includes a first plate segment 61 and a second plate segment 62 .

[0068] Specifically, the first plate segment 61 extends horizontally, the first rivet hole 611 is formed in the first plate segment 61 and penetrates the first plate segment 61 in the up-down direction, the second plate segment 62 is two and is respectively connected to the two ends of the first plate segment 61 and extends downward, wherein the second plate segment 62 is formed with a through hole 621 penetrating in the thickness direction, and / or the lower end of the second plate segment 62 is formed with a folded edge 622 extending in the horizontal direction. In other words, the second plate segment 62 may be formed with a through hole 621 penetrating in the thickness direction, or the lower end of the second plate segment 62 may be formed with a folded edge 622 extending in the horizontal direction, or the second plate segment 62 may be formed with a through hole 621 penetrating in the thickness direction and a folded edge 622 extending in the horizontal direction.

[0069] Preferably, a through hole 621 penetrating along the thickness direction and a folded edge 622 extending along the horizontal direction are formed on the second plate segment 62, and the two folded edges 622 are arranged opposite to each other. Among them, by providing the through hole 621, when the plate body 10 and the insert 60 are injection molded, the injection material can extend into the through hole 621, thereby improving the connection strength between the plate body 10 and the insert 60, and by providing the folded edge 622, when the plate body 10 and the insert 60 are injection molded, the folded edge 622 can increase the contact area between the plate body 10 and the insert 60, thereby further improving the connection strength between the plate body 10 and the insert 60.

[0070] In some embodiments of the utility model, in the vertical direction, the spacing between the folded edge 622 and the first plate segment 61 is not less than 1.5 mm, for example, the spacing between the folded edge 622 and the first plate segment 61 can be 1.5 mm, 2.0 mm or 2.5 mm, the thickness of the injection molding material under the folded edge 622 is not less than 1.5 mm, and the thickness of the injection molding material under the folded edge 622 can be 1.5 mm, 2.0 mm or 2.5 mm. Thus, it can be ensured that the support strength of the plate body 10 on the folded edge 622 meets the use requirements.

[0071] In some embodiments of the utility model, in the up and down direction, the rubber retaining rib 50 is higher than the insert by 600.2mm-0.3mm. For example, the rubber retaining rib 50 can be higher than the insert by 600.2mm, 0.25mm or 0.3mm, thereby ensuring the rubber retaining effect of the rubber retaining rib 50.

[0072] In some embodiments of the present invention, the insert 60 is made of steel material. Preferably, the insert 60 is made of H340LAD Z steel material. The steel material has high strength and can meet the support strength requirement of the insert 60 .

[0073] The insert 60 is a sheet metal part, and the thickness of the insert 60 is 1.5 mm-2 mm. For example, the thickness of the insert 60 can be 1.5 mm, 1.6 mm or 2 mm, thereby ensuring that the strength of the insert 60 meets the use requirements.

[0074] In some embodiments of the present invention, Figure 1 As shown, the battery module 1000 further includes: a flexible circuit board 400, the flexible circuit board 400 is arranged on the side of the side plate 100 away from the battery cell 200, the flexible circuit board 400 is riveted to the side plate 100, a plurality of second rivet holes 410 are formed on the flexible circuit board 400, a plurality of third rivet holes 11 are formed on the side plate 100, and the flexible circuit board 400 is connected to the side plate 100 through the rivet member passing through the second rivet holes 410 and the third rivet holes 11. Among them, the flexible circuit board 400 is arranged on the side of the side plate 100 away from the battery cell 200, which can reduce the difficulty of assembly operation and improve assembly efficiency, and the riveted connection can ensure the reliability of the connection between the flexible circuit board 400 and the side plate 100. Preferably, the flexible circuit board 400 and the side plate 100 are riveted by expansion rivets.

[0075] In some embodiments of the present invention, Figure 2 As shown, a plurality of binding holes 12 are formed on the side plate 100, and the busbar 500 is bound to the side plate 100 through the binding holes 12. The busbar 500 is connected between different battery modules 1000, so as to realize the convergence of multiple battery modules 1000. The binding connection operation is convenient, and the binding part has a low cost, which can improve production efficiency and reduce production costs. Preferably, the binding part is a plastic cable tie, the busbar 500 is a copper busbar, and the diameter of the binding hole 12 is 6.5mm-7mm. For example, the diameter of the binding hole 12 can be 6.5mm, 6.7mm or 7mm, and the wall thickness of the binding hole 12 is 2mm. In this way, the efficiency of binding can be guaranteed, and the support strength of the inner wall of the binding hole 12 can be guaranteed to meet the use requirements.

[0076] In some embodiments of the present invention, Figure 2 As shown, a plurality of positioning reference holes 13 are formed on the side panel 100, and the plurality of positioning reference holes 13 are evenly arranged at both ends of the length direction of the side panel 100. By setting the positioning reference holes 13, when the side panel 100 is connected to the battery cell 200, the operator can quickly locate it, and can intuitively know whether the assembly is misaligned, thereby improving the assembly efficiency and assembly accuracy.

[0077] The battery pack according to the second embodiment of the present invention comprises: a box body and the battery module 1000 according to the first embodiment of the present invention, the battery module 1000 is arranged in the box body, and the side plate 100 is fixedly connected to the box body through a fixing part.

[0078] According to the battery pack of the second aspect of the present invention, by providing the battery module 1000 according to the first aspect of the present invention, the consistency of different battery modules 1000 in the battery pack and the reliability of the battery pack during operation can be improved.

[0079] In some embodiments of the utility model, the box body includes: a lower shell body, a lower cross beam is provided on the lower shell body, and the side panel 100 is connected to the lower cross beam through a fixing part. The lower cross beam has a high supporting strength and a large thickness. Therefore, the reliability of the connection between the side panel 100 and the box body can be improved, and the difficulty of connecting the side panel 100 and the box body can be reduced.

[0080] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are stacked and arranged along a first direction; A side plate, the side plate is arranged on both sides of the plurality of battery cells in the first direction, and the side plate has a fixing portion for connecting to a box body of a battery pack; A buffer member is disposed between the side plate and the battery cell.

2. The battery module according to claim 1, characterized in that: There are multiple fixing parts, which are arranged at intervals along a second direction perpendicular to the first direction. The fixing parts are formed as fixing holes, which penetrate the side plate in the up and down directions. The side plate is fastened to the box body by fasteners passing through the fixing holes.

3. The battery module according to claim 2, characterized in that: The side plate includes: a plate body and a bushing, the plate body is formed with a through hole penetrating the plate body up and down, the bushing is embedded in the through hole, and the inner side of the bushing defines the fixing hole.

4. The battery module according to claim 1, characterized in that: Also includes: A liquid cooling plate is arranged on the upper side of the plurality of battery cells, and the side plate is fixedly connected to the liquid cooling plate.

5. The battery module according to claim 4, characterized in that: An adhesive area is formed on the upper surface of the side plate, and an adhesive layer is provided on the adhesive area, and the side plate is fixedly connected to the liquid cooling plate through the adhesive layer; The upper surface of the side panel is provided with a glue overflow groove and a glue blocking rib, the glue overflow groove extends along the circumference of the bonding area, the glue blocking rib is arranged on the side of the glue overflow groove away from the bonding area, and in the up and down direction, the upper end of the glue blocking rib is higher than the upper surface of the side panel.

6. The battery module according to claim 5, characterized in that: The side plate is formed with a plurality of first rivet holes arranged at intervals, and the side plate is riveted and connected to the liquid cooling plate via rivets passing through the first rivet holes.

7. The battery module according to claim 6, characterized in that: The side plate comprises: a plate body and an insert, the plate body is an injection molded part, the insert is connected to the plate body as a whole through injection molding, and the first rivet hole is formed on the insert.

8. The battery module according to claim 7, characterized in that: The insert comprises: a first plate segment, the first plate segment extending horizontally, the first rivet hole being formed in the first plate segment and penetrating the first plate segment in a vertical direction; The second plate segment includes two second plate segments respectively connected to the two ends of the first plate segment and extending downward, wherein the second plate segment is provided with a through hole penetrating along the thickness direction, and / or the lower end of the second plate segment is provided with a folded edge extending along the horizontal direction.

9. The battery module according to any one of claims 1 to 8, characterized in that: Also includes: A flexible circuit board, the flexible circuit board is arranged on a side of the side plate away from the battery cell, the flexible circuit board is riveted to the side plate, a plurality of second rivet holes are formed on the flexible circuit board, a plurality of third rivet holes are formed on the side plate, the flexible circuit board is connected to the side plate through a rivet member passing through the second rivet holes and the third rivet holes; and / or, The busbar is provided with a plurality of binding holes on the side plate, and the busbar is bound to the side plate by the binding piece passing through the binding holes.

10. A battery pack, characterized in that: include: Box; The battery module according to any one of claims 1 to 9, wherein the battery module is disposed in the box, and the side panel is fixedly connected to the box via the fixing portion.

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