CN212587605U

CN212587605U - Battery module

Info

Publication number: CN212587605U
Application number: CN202021029082.XU
Authority: CN
Inventors: 柯颖华; 林鹏; 赖信华; 董锋; 沈剑
Original assignee: Yinlong New Energy Co Ltd
Current assignee: Yinlong New Energy Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-23
Anticipated expiration: 2030-06-05

Abstract

The utility model provides a battery module, wherein an end plate component, a plurality of single batteries, an integrated cover plate, a press rib and a packing belt are arranged in the battery module, and the end plate component comprises an injection molding structural part and a metal structural part; the plurality of single batteries are arranged between the two metal structural members of the two end plate assemblies side by side; the integrated cover plate is arranged on the upper sides of the single batteries; the pressing ribs are pressed on the upper side of the integrated cover plate, and the two ends of the pressing ribs are connected with the two metal structural members of the two end plate assemblies in a one-to-one correspondence manner; the packing belt is bound on the outer surfaces of the two injection molding structural parts of the two end plate assemblies and the outer surfaces of the single batteries. By adopting the scheme, the contact area between the packing belt and the end plate assembly is large, stress concentration is avoided, and the stability and reliability of the battery module are improved. Adopt the beading to press on integrated apron and be connected with the end plate subassembly, improved battery module's structural strength, the assembly of being convenient for. In addition, the scheme can optimize the structure and the process of the battery module and reduce the production cost.

Description

Battery module

Technical Field

The utility model relates to a new forms of energy technical field particularly, relates to a battery module.

Background

The lithium ion power battery module is used as a core component of an electric automobile, and the stability and reliability of the structure of the lithium ion power battery module directly influence the performance and the service life of the whole battery system. In the new energy electric automobile industry, a battery module is usually formed by connecting a plurality of single batteries in series/parallel and is arranged between a cover plate and a bottom plate, a side plate and an end plate are arranged around the plurality of single batteries, and the bottom plate, the side plate, the end plate and the cover plate are fixed by bolts. Such a battery module is not only heavy but also high in cost.

The prior art provides a battery module, including packing area, two end plates, integrated apron and a plurality of battery cell, a plurality of battery cell arrange the setting between two end plates, and integrated apron sets up in a plurality of battery cell's top to bind a plurality of battery cell and end plate with the packing area, thereby become a body structure. By adopting the scheme, the structure of the battery module is simplified, and the weight and the cost of the battery module are reduced.

However, the end plates of the conventional battery module are all of a plate-shaped metal structure, and after the battery module is bound by using a packing belt, the problem of uneven stress exists, stress is concentrated at local positions, and the stability and reliability of the battery module are affected.

Disclosure of Invention

The utility model provides a battery module to improve the stability and the reliability of the battery module among the prior art.

In order to achieve the above object, the utility model provides a battery module, battery module includes: the end plate assembly comprises two injection molding structural parts and two metal structural parts; the single batteries are arranged between the two metal structural members of the two end plate assemblies side by side; an integrated cover plate disposed on upper sides of the plurality of unit batteries; the two ends of the pressing rib are connected with the two metal structural members of the two end plate assemblies in a one-to-one correspondence manner; and the packing belt is bound on two injection molding structural parts of the two end plate assemblies and the outer surfaces of the plurality of single batteries.

Furthermore, the ribbing comprises a plurality of bent ribs and a connecting sheet arranged at the end part of the ribs, and the upper end of the metal structural part is connected with the connecting sheet through a fastener.

Further, the rib is an integrally formed sheet metal part and comprises a first folded plate, a second folded plate, a third folded plate, a fourth folded plate and a fifth folded plate which are connected in sequence, wherein the first folded plate, the third folded plate and the fifth folded plate are parallel to each other, the first folded plate and the fifth folded plate are abutted against the integrated cover plate, and the third folded plate and the integrated cover plate are arranged at intervals; the rib pressing device is characterized in that the rib pressing device further comprises a clamping head, the clamping head protrudes out of the end portion of the second folded plate and/or the end portion of the fourth folded plate, a clamping groove is formed in the upper end of the metal structural member, and the clamping head is clamped in the clamping groove of the metal structural member.

Further, the injection molding structural part is provided with a first side and a second side which are opposite, the first side of the injection molding structural part is provided with a groove used for accommodating the packing belt, and the injection molding structural part is provided with an avoidance hole; the metal structure spare includes the backup pad and sets up the installed part of one side of backup pad, the backup pad sets up the second side of injection moulding structure spare, the upper end of backup pad with the end connection of pressing the muscle, the installed part passes dodge the hole and protrusion in the first side of injection moulding structure spare.

Furthermore, along the extending direction of the belt groove, two ends of the belt groove are respectively provided with a belt penetrating port for penetrating through a packing belt, the two belt penetrating ports are respectively positioned at two edges of the injection molding structural part, an arc-shaped transition surface is arranged in each belt penetrating port, and the arc-shaped transition surface is used for being matched with the bending position of the packing belt; the strap threading device is characterized in that two opposite guide arc surfaces are further arranged in the strap threading opening and used for guiding the packing strap, the two guide arc surfaces are respectively the end parts of two opposite side walls of the strap groove, the arc-shaped transition surface is located between the two guide arc surfaces, and the arc-shaped transition surface is the end part of the bottom wall of the strap groove.

Furthermore, the supporting plate comprises a plate body and a connecting plate arranged at the upper end of the plate body, the plate body is connected with the injection molding structural part, at least one part of the connecting plate protrudes out of the top end of the injection molding structural part, and the connecting plate is connected with the end part of the pressing rib.

Further, the integrated cover plate includes: the lower cover plate comprises a lower cover body, the lower side of the lower cover body is used for being matched with a single battery, the upper side of the lower cover body is provided with a wiring groove for containing a wiring harness and clamping plates arranged on the side wall of the wiring groove, and the clamping plates and the groove bottom of the wiring groove are arranged at intervals to clamp the wiring harness; divide pole piece and total pole piece, divide the pole piece with total pole piece all sets up the upside of lower cover body.

Furthermore, the number of the clamping plates is multiple, the wiring groove is provided with two opposite side walls, the clamping plates are distributed on the two side walls of the wiring groove, and the clamping plate on one side wall of the wiring groove and the clamping plate on the other side wall of the wiring groove are alternately arranged along the extending direction of the wiring groove.

Further, the wiring groove comprises a long groove and a plurality of short grooves, the plurality of short grooves are communicated with the long groove, the long groove extends along the length direction of the lower cover body, the plurality of short grooves extend along the width direction of the lower cover body, and the wiring harness is distributed in the long groove and the plurality of short grooves; the clamping plates are distributed on the inner wall of the long groove and the inner walls of the short grooves.

Furthermore, a first mounting area and a second mounting area which are arranged at intervals are arranged on the upper side of the lower cover body, the first mounting area and the second mounting area both extend along the length direction of the lower cover body, the wiring groove is located between the first mounting area and the second mounting area, and the sub-pole piece and the main pole piece are distributed on the first mounting area and the second mounting area; the first installation area is internally provided with a plurality of first installation grooves, each first installation groove is communicated with the wiring groove, and each first installation groove is internally provided with one sub-pole piece or one main pole piece; have a plurality of second mounting grooves in the second installing zone, every the second mounting groove all with trough intercommunication, every all install one in the second mounting groove divide the pole piece.

Furthermore, the upper side of the lower cover body is provided with a positive plate groove and a negative plate groove, and the positive plate groove and the negative plate groove are respectively positioned at two ends of the lower cover body; the lower cover plate further comprises a lower anode mark and a lower cathode mark, the lower anode mark is arranged corresponding to the anode sheet groove, and the lower cathode mark is arranged corresponding to the cathode sheet groove; the total pole piece is two, two total pole piece is anodal total pole piece and negative pole total pole piece respectively, wherein, anodal total pole piece sets up in the anodal piece inslot, the total pole piece setting of negative pole is in the negative pole piece inslot.

Further, the integrated cover plate further comprises: the upper cover plate comprises an upper cover body and an upper convex edge arranged on the periphery of the upper cover body in a surrounding mode, and a plurality of clamping pieces are distributed on the upper convex edge; the periphery of the upper side of the lower cover body is provided with a lower convex edge in a surrounding manner, the lower convex edge is provided with a plurality of clamping grooves in a distributed manner, and the plurality of clamping pieces are clamped in the plurality of clamping grooves in a one-to-one corresponding manner; the sub-pole pieces and the total pole piece are located between the upper cover body and the lower cover body, and the pressing rib is pressed on the upper side of the upper cover body.

Furthermore, the pressing rib is provided with a plurality of top vent holes which are arranged at intervals along the length direction of the pressing rib; the upper cover plate is provided with an assembly groove, the assembly groove is positioned on one side of the upper cover plate, which is far away from the lower cover plate, the assembly groove extends along the length direction of the upper cover plate, and the press rib is arranged in the assembly groove; the upper cover plate is provided with a plurality of upper vent holes, and the upper vent holes are arranged on the bottom wall of the assembling groove at intervals along the length direction of the assembling groove.

Furthermore, the number of the total pole pieces is two, and the two total pole pieces are respectively a positive total pole piece and a negative total pole piece; the upper cover plate comprises an upper cover body, the upper cover body is provided with a positive plate hole and a negative plate hole, the positive plate hole and the negative plate hole are respectively located at two ends of the upper cover body, the positive plate hole corresponds to the positive general pole piece, and the negative plate hole corresponds to the negative general pole piece.

Further, the battery module still includes: the positive pole shield is buckled at the positive pole plate hole, and the surface of the positive pole shield is provided with a positive pole ejecting mark; the negative pole shield is buckled at the position of the negative pole piece hole, and the surface of the negative pole shield is provided with a negative pole ejecting mark.

The technical scheme of the utility model is applied, a battery module is provided, an end plate component, a plurality of single batteries, an integrated cover plate, a press rib and a packing belt are arranged in the battery module, the end plate component comprises an injection molding structural member and a metal structural member, and the number of the end plate components is two; the plurality of single batteries are arranged between the two metal structural members of the two end plate assemblies side by side; the integrated cover plate is arranged on the upper sides of the single batteries; the pressing ribs are pressed on the upper side of the integrated cover plate, and the two ends of the pressing ribs are connected with the two metal structural members of the two end plate assemblies in a one-to-one correspondence manner; the packing belt is bound on the outer surfaces of the two injection molding structural parts of the two end plate assemblies and the outer surfaces of the single batteries. By adopting the arrangement, the packing belt is lower in strength and contacts with the injection molding structural part with certain deformability, so that the contact area between the packing belt and the end plate assembly is large, stress concentration is avoided, and the stability and the reliability of the battery module are improved. And, adopt the beading to press on integrated apron and be connected with the end plate subassembly, improved battery module's structural strength, be convenient for the assembly.

By adopting the technical scheme, the structure of the battery module can be simplified, the weight is reduced, the strength of the battery module is improved, the stress at different positions of the battery module is uniform, the borne torque is small, and the reliability and the stability of the battery module are improved. Moreover, the scheme can optimize the assembly process of the battery module, improve the production efficiency and reduce the cost.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 illustrates an exploded view of the battery module in fig. 1;

fig. 3 illustrates a side view of the battery module in fig. 2;

FIG. 4 shows a schematic view of the bead of FIG. 1;

FIG. 5 shows a schematic structural view of the end plate assembly of FIG. 1;

FIG. 6 shows a schematic view of the end plate assembly of FIG. 5 on the other side;

FIG. 7 shows a schematic view of the injection molded structure of FIG. 5;

FIG. 8 shows a schematic view of the metal structure of FIG. 5;

FIG. 9 shows a schematic structural view of the integrated cover plate of FIG. 1 (without the upper cover plate);

FIG. 10 is a schematic view showing the structure of the lower cover plate of FIG. 9;

FIG. 11 shows a schematic view of the lower cover plate of FIG. 10 on the other side;

fig. 12 shows a schematic structural view of the upper cover plate in fig. 1.

Wherein the figures include the following reference numerals:

110. injection molding the structural part; 111. a belt groove is formed; 112. avoiding holes; 113. an arc transition surface; 114. guiding the arc surface; 115. a fabrication hole; 116. a convex plate; 117. an annular convex rib; 120. a metal structural member; 121. a support plate; 122. a mounting member; 123. a hook plate; 124. mounting a plate; 125. a plate body; 126. a connecting plate; 127. a notch; 128. a card slot; 210. a lower cover plate; 211. a lower cover body; 2111. a wiring groove; 2112. a first mounting groove; 2113. a second mounting groove; 2114. a positive plate groove; 2115. a negative plate groove; 212. clamping a plate; 213. a pole hole; 214. a lower vent; 215. marking a lower positive pole; 216. a lower cathode mark; 217. a lower convex edge; 218. a clamping piece; 220. an upper cover plate; 221. an upper cover body; 2211. assembling a groove; 222. an upper flange; 2221. a clamping groove; 223. an upper vent; 224. a positive plate hole; 225. a negative plate hole; 226. a first rib; 227. a second rib; 228. an anode mark is added; 229. an upper negative pole mark; 231. a wire harness; 232. dividing pole pieces; 233. a total pole piece; 310. a single battery; 410. pressing ribs; 411. ribs; 412. connecting sheets; 413. clamping a head; 414. a top vent; 510. packing a belt; 610. a positive electrode shield; 611. carrying out positive pole jacking identification; 620. a negative electrode shield; 621. and (4) identifying the top and the negative poles.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the accompanying drawings, embodiments of the present invention provide a battery module, which includes: the end plate assembly comprises an injection molding structural part 110 and a metal structural part 120, and the number of the end plate assemblies is two; a plurality of unit cells 310, the plurality of unit cells 310 being arranged side by side between the two metal structural members 120 of the two end plate assemblies; an integrated cap plate disposed at an upper side of the plurality of unit batteries 310; the pressing ribs 410 are pressed on the upper side of the integrated cover plate, and two ends of the pressing ribs 410 are connected with the two metal structural members 120 of the two end plate assemblies in a one-to-one correspondence manner; and the packing belts 510 are bound on the outer surfaces of the two injection-molded structural members 110 of the two end plate assemblies and the plurality of unit cells 310.

The technical scheme of the utility model is applied, a battery module is provided, an end plate component, a plurality of single batteries 310, an integrated cover plate, a press rib 410 and a packing belt 510 are arranged in the battery module, the end plate component comprises an injection molding structural member 110 and a metal structural member 120, and the number of the end plate components is two; a plurality of unit cells 310 are arranged side by side between two metal structural members 120 of two end plate assemblies; the integrated cap plate is disposed at the upper side of the plurality of unit batteries 310; the press ribs 410 are pressed against the upper side of the integrated cover plate, and two ends of the press ribs 410 are connected with the two metal structural members 120 of the two end plate assemblies in a one-to-one correspondence manner; the packing straps 510 are tied to the outer surfaces of the two injection molded structures 110 of the two end plate assemblies and the plurality of unit cells 310 to connect the two end plate assemblies and the plurality of unit cells 310 together. With the adoption of the arrangement, the packing belt 510 is in contact with the injection molding structural part 110 which has lower strength and certain deformability, so that the contact area between the packing belt 510 and the end plate assembly is large, stress concentration is avoided, and the stability and the reliability of the battery module are improved. Moreover, the pressing ribs 410 are adopted to press the integrated cover plate and are connected with the end plate assembly, so that the structural strength of the battery module is improved, and the assembly is facilitated.

Alternatively, in the present embodiment, the unit cell 310 may be set to an integer multiple of 2, which facilitates assembly and wiring connection. A PC board is disposed between the metal structural member 120 and the unit cell 310.

In this embodiment, the bead 410 includes a plurality of bent ribs 411 and a connecting piece 412 provided at an end of the ribs 411, and the upper end of the metal structural member 120 is connected to the connecting piece 412 by a fastener. The structural strength of the bead 410 can be increased by the rib 411 having a plurality of bends, and the upper end of the metallic structural member 120 can be reliably connected to the connecting piece 412 by the fastening member. The connecting piece can adopt a blind rivet, and the operation is convenient.

In this embodiment, the rib 411 is an integrally formed sheet metal part, and the rib 411 includes a first folded plate, a second folded plate, a third folded plate, a fourth folded plate and a fifth folded plate which are connected in sequence, wherein the first folded plate, the third folded plate and the fifth folded plate are parallel to each other, the first folded plate and the fifth folded plate are both abutted to the integrated cover plate, and the third folded plate and the integrated cover plate are arranged at intervals; the pressing rib 410 further includes a clamping head 413, the clamping head 413 is arranged at the end of the second folded plate and/or the fourth folded plate in a protruding manner, the upper end of the metal structure member 120 is provided with a clamping groove 128, and the clamping head 413 is clamped in the clamping groove 128 of the metal structure member 120. The structural strength and the load-bearing capacity of the rib 411 can be improved by the above arrangement. The clamping head 413 of the pressing rib 410 is clamped in the clamping groove 128 of the metal structural member 120, so that the pressing rib 410 and the end plate assembly can be reliably connected, and the reliability of the battery module is improved.

In the present embodiment, the injection-molded structural member 110 has a first side and a second side opposite to each other, the first side of the injection-molded structural member 110 has a groove 111 for accommodating the strapping band 510, and the injection-molded structural member 110 has an avoiding hole 112; the metal structure member 120 includes a support plate 121 and a mounting member 122 disposed at one side of the support plate 121, the support plate 121 is disposed at a second side of the injection molding structure member 110, an upper end of the support plate 121 is connected to an end of the pressing rib 410, and the mounting member 122 passes through the avoiding hole 112 and protrudes out of the first side of the injection molding structure member 110. Adopt above-mentioned setting, when assembling battery module, can twine the packing area in the trough of belt 111 of structure 110 that moulds plastics, the structural strength of end plate subassembly and battery module is guaranteed to accessible metal structure 120 on the one hand like this, on the other hand packing area is lower and have the structure 110 direct contact that moulds plastics of certain deformability with intensity, rather than with metal material direct contact, can make the area of contact of packing area and end plate subassembly big like this, thereby make the atress ratio in end plate subassembly and packing area more even, avoid stress concentration, thereby battery module's stability and reliability have been improved. Moreover, the strap slot 111 can limit the strap, thereby further improving the reliability. The mounting member 122 is used for being connected with other structures so as to fix the battery module, and the mounting member 122 can also be used as a hoisting point for hoisting the battery module by hoisting equipment.

In this embodiment, along the extending direction of the belt groove 111, two ends of the belt groove 111 respectively have a belt threading port for passing through the packing belt 510, the two belt threading ports are respectively located at two edges of the injection-molded structural member 110, an arc-shaped transition surface 113 is provided in the belt threading port, and the arc-shaped transition surface 113 is used for matching with the bending position of the packing belt 510. Through setting up arc transition face 113, can be so that the contact surface of the position of buckling of injection moulding structure 110 and packing area is the cambered surface, has increased area of contact like this, has avoided concentrating at the position stress of buckling to make packing area and the whole diapire contact of trough of belt 111, further increased the area of contact of packing area with the end plate subassembly, make the end plate subassembly atress even, optimize the structure of battery module. The threading opening is also internally provided with two opposite guide arc-shaped surfaces 114, the guide arc-shaped surfaces 114 are used for guiding the packing belt 510, the two guide arc-shaped surfaces 114 are respectively the end parts of two opposite side walls of the belt groove 111, the arc-shaped transition surface 113 is positioned between the two guide arc-shaped surfaces 114, and the arc-shaped transition surface 113 is the end part of the bottom wall of the belt groove 111. Adopt above-mentioned setting for wear the width of taking mouthful to be greater than the inside width of trough of belt 111, two guide cambered surfaces 114 of accessible guide the packing area, are convenient for twine the packing area in the trough of belt 111, improve production efficiency.

Optionally, the bottom of the first side of the injection molding structure 110 has a limiting step, and the limiting step can be matched with other structures to facilitate the positioning and limiting of the battery module. In the present embodiment, the first side of the injection-molded structure 110 refers to a side facing the outside of the battery module, and the second side of the injection-molded structure 110 refers to a side facing the inside of the battery module.

Optionally, the mounting member 122 is located in the middle of the injection molding structure 110, i.e., the top end of the mounting member 122 is a first predetermined distance from the top end of the injection molding structure 110, and the bottom end of the mounting member 122 is a second predetermined distance from the bottom end of the injection molding structure 110. Adopt above-mentioned setting, fix the back on other structures through installed part 122 with battery module, for example fix on vehicle chassis, because installed part 122 is located battery module's middle part, consequently can reduce the moment that battery module bore, improve structural stability.

Optionally, in this embodiment, the plurality of belt grooves 111 are provided, the plurality of belt grooves 111 are arranged side by side on the first side of the injection-molded structural member 110, and the mounting member 122 is located between two adjacent belt grooves 111. Through setting up a plurality of trough of belt 111, can correspond a plurality of packing of winding and take to improve battery module's overall structure intensity. Alternatively, the belt grooves 111 are two, and both the belt grooves 111 extend in the horizontal direction.

In the present embodiment, the injection-molded structural member 110 has a plurality of the mounting members 122, and the plurality of the mounting members 122 are disposed between two adjacent mounting members 122, wherein the plurality of the mounting members 122 are disposed at the same location. Through setting up a plurality of installed parts 122, can improve battery module and the joint strength and the structural stability of other structures. The tooling holes 115 may facilitate injection molding of the injection molded structural member 110 and may reduce material usage, weight, and cost.

Optionally, the process hole 115 has an annular rib 117 at the periphery thereof, and the structural strength and the load-bearing capacity of the injection-molded structural member 110 can be improved by providing the annular rib 117.

Optionally, the support plate 121 has notches 127 for avoiding the plurality of tooling holes 115. Optionally, the second side of the injection molded structure 110 is provided with a plurality of ribs, which may further improve the structural strength and the load bearing capacity of the injection molded structure 110.

In this embodiment, the support plate 121 includes a plate body 125 and a connecting plate 126 disposed at an upper end of the plate body 125, the plate body 125 is connected to the injection-molded structure 110, at least a portion of the connecting plate 126 protrudes from a top end of the injection-molded structure 110, and the connecting plate 126 is connected to an end of the bead 410. This facilitates the connection of the endplate assembly to the bead 410.

In the above embodiment, the second side of the injection molding structure member 110 has a mounting groove, at least a portion of the support plate 121 is located in the mounting groove, and a side wall of the mounting groove matches with a periphery of the support plate 121 located in the mounting groove. The side walls of the mounting grooves are matched with the periphery of the support plate 121 positioned in the mounting grooves, so that the support plate 121 can be positioned and limited, the assembly is facilitated, the reliable connection between the injection molding structural member 110 and the metal structural member 120 can be realized, and the structural strength of the end plate assembly is improved.

Optionally, in this embodiment, the mounting member 122 includes a vertically arranged hook plate 123 and a horizontally arranged mounting plate 124, both the hook plate 123 and the mounting plate 124 are connected with the support plate 121, and the hook plate 123 is used for hoisting; the number of the hook plates 123 is two, the two hook plates 123 are arranged in parallel, and two ends of the mounting plate 124 are respectively connected with the bottoms of the two hook plates 123 in a one-to-one correspondence manner. The hook plate 123 is of a hook structure, so that the battery module can be conveniently lifted by being connected with lifting equipment. Through mounting panel 124, can conveniently be with battery module and other structure fixed connection. Furthermore, the above arrangement of the hook plate 123 and the mounting plate 124 may improve the load bearing capacity and structural strength of the mounting member 122.

Optionally, the mounting plate 124 has holes for mounting fasteners to facilitate threading of the fasteners and attachment to other structures.

Optionally, a convex plate 116 is disposed on the upper edge of the avoiding hole 112, the convex plate 116 is located between the two hook plates 123, and the width of the convex plate 116 is smaller than the width of the avoiding hole 112. The side surface of the protruding plate 116 is in contact with the side surface of the support plate 121, and by the above arrangement, the strength of the end plate assembly can be improved.

Optionally, the connecting plate 126 has through holes for passing fasteners, so that the connection by the fasteners is facilitated. The connection plate 126 is provided at both sides thereof with a catching groove 128, so that the connection plate 126 is easily caught to other structures of the battery module, the assembly is easy, and the stability and reliability of the structure can be improved.

In this embodiment, the integrated cover plate includes: the lower cover plate 210 comprises a lower cover body 211, the lower side of the lower cover body 211 is used for being matched with the single battery 310, the upper side of the lower cover body 211 is provided with a wiring groove 2111 for accommodating the wiring harness 231 and a clamping plate 212 arranged on the side wall of the wiring groove 2111, and the clamping plate 212 and the groove bottom of the wiring groove 2111 are arranged at intervals to clamp the wiring harness 231; the sub-pole piece 232 and the total pole piece 233, and the sub-pole piece 232 and the total pole piece 233 are all arranged on the upper side of the lower cover body 211. Adopt this technical scheme, set up pencil 231 in trough 2111 to fix through cardboard 212, can avoid pencil 231 protrusion in the surface of apron 210 down like this, and fixed pencil 231 of having avoided removing through cardboard 212, consequently can play good protection effect to pencil 231, avoid other structures extrusion or friction pencil 231, thereby improved battery module's security. In the present embodiment, the divided pole piece 232 and the total pole piece 233 are connected by the wire harness 231.

In this embodiment, there are a plurality of the card boards 212, the wiring groove 2111 has two opposite side walls, the plurality of card boards 212 are distributed on the two side walls of the wiring groove 2111, and the card boards 212 on one side wall of the wiring groove 2111 and the card boards 212 on the other side wall of the wiring groove 2111 are alternately arranged along the extending direction of the wiring groove 2111. The limiting effect on the wire harness 231 can be improved by the plurality of catch plates 212 arranged alternately.

In this embodiment, the wiring slot 2111 includes a long slot and a plurality of short slots, the plurality of short slots are all communicated with the long slot, the long slot extends along the length direction of the lower cover body 211, the plurality of short slots all extend along the width direction of the lower cover body 211, and the wiring harness 231 is distributed in the long slot and the plurality of short slots; the clamping plates 212 are multiple, and the multiple clamping plates 212 are distributed on the inner wall of the long groove and the inner walls of the multiple short grooves. Through the long groove and the short grooves, the arrangement of the wiring harness 231 can be facilitated, so that the connection of different electrical appliance structural members can be realized, the clamping plates 212 are distributed on the inner wall of the long groove and the inner walls of the short grooves, the wiring harness 231 in the long groove and the short grooves can be limited, and the wiring harness 231 can be prevented from falling off.

In this embodiment, the upper side of the lower cover body 211 has a first mounting area and a second mounting area that are arranged at an interval, the first mounting area and the second mounting area both extend along the length direction of the lower cover body 211, the wiring groove 2111 is located between the first mounting area and the second mounting area, and the split pole pieces 232 and the total pole piece 233 are distributed on the first mounting area and the second mounting area. The arrangement of the divided pole piece 232 and the main pole piece 233 is facilitated by the first mounting area and the second mounting area, and the wiring groove 2111 is located between the first mounting area and the second mounting area, and the connection of the voltage collecting line and the temperature collecting line provided in the wiring groove 2111 with the divided pole piece 232 and the main pole piece 233 is facilitated. The first installation area is internally provided with a plurality of first installation grooves 2112, each first installation groove 2112 is communicated with the wiring groove 2111, and each first installation groove 2112 is internally provided with a sub-pole piece 232 or a main pole piece 233; have a plurality of second mounting grooves 2113 in the second installing zone, every second mounting groove 2113 all communicates with trough 2111, all installs a branch pole piece 232 in every second mounting groove 2113. The installation of the divided pole piece 232 or the total pole piece 233 can be facilitated by providing the plurality of first installation grooves 2112 and the plurality of second installation grooves 2113.

Optionally, the shape of the inner wall of the first mounting groove 2112 matches the periphery of the pole piece located inside the first mounting groove 2112, and the shape of the inner wall of the second mounting groove 2113 matches the periphery of the pole piece located inside the second mounting groove 2113, so that a good limiting effect can be achieved on the pole piece. Optionally, the inner wall of the first mounting groove 2112 is provided with a buckle, and the inner wall of the second mounting groove 2113 is provided with a buckle, so that the first mounting groove is conveniently clamped with other structural members, and the connection strength is improved.

Optionally, there are two total pole pieces 233, and the two total pole pieces 233 are respectively located at two ends of the first mounting region; the sub-pole pieces 232 are multiple, a part of the sub-pole pieces 232 in the plurality of sub-pole pieces 232 are distributed on the first mounting region along the length direction of the first mounting region and located between the two main pole pieces 233, and the other part of the sub-pole pieces 232 in the plurality of sub-pole pieces 232 are distributed on the second mounting region along the length direction of the second mounting region. Through the arrangement, the single battery and the pole piece are connected conveniently.

Optionally, in this embodiment, the lower cover body 211 has a plurality of pole column holes 213, the plurality of pole column holes 213 are distributed in the first mounting area and the second mounting area, the pole column holes 213 in the first mounting area and the pole column holes 213 in the second mounting area are arranged in a one-to-one correspondence, and the pole column holes 213 are used for avoiding poles of the single battery; the lower cover body 211 has a plurality of lower vent holes 214, the plurality of lower vent holes 214 are provided at intervals along the length direction of the lower cover body 211, and the plurality of lower vent holes 214 are located between the first mounting region and the second mounting region. Through setting up utmost point post hole 213, the utmost point post and the pole piece of the monomer battery of being convenient for are connected to transmit electricity. The lower vent hole 214 is used to correspond to an explosion-proof valve to exhaust gas in case of danger, thereby improving safety. The lower vent holes 214 have cross-shaped frames therein, and the cross-shaped frames are connected to the inner walls of the lower vent holes 214 to play a role in increasing structural strength.

In this embodiment, the upper side of the lower cover body 211 has a positive plate slot 2114 and a negative plate slot 2115, and the positive plate slot 2114 and the negative plate slot 2115 are respectively located at two ends of the lower cover body 211; the lower cover plate 210 further comprises a lower positive pole mark 215 and a lower negative pole mark 216, wherein the lower positive pole mark 215 corresponds to the positive pole piece slot 2114, and the lower negative pole mark 216 corresponds to the negative pole piece slot 2115; the total pole piece 233 is two, and the two total pole pieces 233 are a positive total pole piece and a negative total pole piece respectively, wherein the positive total pole piece is arranged in the positive pole piece groove 2114, and the negative total pole piece is arranged in the negative pole piece groove 2115. Through the arrangement, the positive total pole piece and the negative total pole piece are convenient to mount. Moreover, the lower positive pole mark 215 and the lower negative pole mark 216 can play a role in prompting during assembly, and misassembly is avoided.

In the present embodiment, the positive electrode tab slot 2114 and the negative electrode tab slot 2115 are provided on the upper side of the lower cover body 211, that is, asymmetrically provided, which prevents an error in assembly. The positive plate slot 2114 and the negative plate slot 2115 are respectively located at two ends of the first mounting region, that is, the two first mounting slots 2112 at two ends of the first mounting region are the positive plate slot 2114 and the negative plate slot 2115 respectively.

Optionally, the inner walls of the positive plate slot 2114 and the negative plate slot 2115 are provided with buckles, so that the pole pieces mounted in the positive plate slot 2114 and the negative plate slot 2115 can be clamped, and stability and reliability are improved.

In this embodiment, the lower flange 217 is disposed around the periphery of the upper side of the lower cover body 211, and a plurality of clamping members 218 and/or a plurality of clamping grooves are disposed on the outer side of the lower flange 217. Through the chimb 217 can improve the intensity of apron 210 down, through a plurality of joint spare 218 and/or a plurality of joint groove, be convenient for with other structure joint, improve assembly efficiency. Further, in this embodiment, the inboard distribution of lower flange 217 is provided with a plurality of buckles, and the buckle is used for cooperating with the pole piece to carry on spacingly to the pole piece, improve stability and reliability.

Optionally, the lower cover plate 210 further includes a plurality of ribs arranged in a staggered manner, and the plurality of ribs are distributed on the lower side of the lower cover body 211. This may improve the strength of the lower cover plate 210. In this embodiment, a temperature sensor is further disposed on the pole piece in the lower cover plate 210 to detect the temperature of the battery module, thereby improving the safety.

In this embodiment, the integrated cover plate further includes: the upper cover plate 220 comprises an upper cover body 221 and an upper flange 222 arranged around the periphery of the upper cover body 221, and a plurality of clamping pieces 218 are distributed on the upper flange 222; a lower convex edge 217 is arranged around the periphery of the upper side of the lower cover body 211, a plurality of clamping grooves 2221 are distributed on the lower convex edge 217, and a plurality of clamping pieces 218 are clamped in the clamping grooves 2221 in a one-to-one correspondence manner; the partial pole pieces 232 and the total pole piece 233 are located between the upper cover body 221 and the lower cover body 211, and the beads 410 are pressed against the upper side of the upper cover body 221. The upper cover plate 220 can play a role in protection, and can be assembled conveniently in a clamping mode, so that reliable connection is realized.

In the present embodiment, the bead 410 has a plurality of top vent holes 414, and the top vent holes 414 are arranged at intervals along the length direction of the bead 410; the upper cover plate 220 is provided with an assembly groove 2211, the assembly groove 2211 is positioned on one side of the upper cover plate 220, which faces away from the lower cover plate 210, the assembly groove 2211 extends along the length direction of the upper cover plate 220, and the press rib 410 is arranged in the assembly groove 2211; the upper cover 220 has a plurality of upper vent holes 223, and the plurality of upper vent holes 223 are provided in the bottom wall of the fitting groove 2211 at intervals in the longitudinal direction of the fitting groove 2211. The limiting of the beads 410 is facilitated by the provision of the fitting groove 2211. The plurality of upper vent holes 223 correspond to explosion-proof valves to improve safety.

In this embodiment, there are two total pole pieces 233, and the two total pole pieces 233 are a positive total pole piece and a negative total pole piece, respectively; the upper cover plate 220 includes an upper cover body 221, the upper cover body 221 has a positive plate hole 224 and a negative plate hole 225, the positive plate hole 224 and the negative plate hole 225 are respectively located at two ends of the upper cover body 221, wherein the positive plate hole 224 corresponds to the positive general pole piece for mounting the power line, and the negative plate hole 225 corresponds to the negative general pole piece for mounting the power line. Through the arrangement, the installation of the positive total pole piece and the negative total pole piece is facilitated.

Optionally, in this embodiment, the upper cover plate 220 further includes: the first rib 226 is located on one side of the upper cover body 221, which faces away from the lower cover plate 210, and the first rib 226 is arranged along the periphery of the positive plate hole 224; the second rib 227 is located on one side of the upper cover body 221, which is away from the lower cover plate 210, and the second rib 227 is arranged along the periphery of the negative pole piece hole 225; an upper positive pole mark 228, wherein the upper positive pole mark 228 is located on one side of the upper cover body 221 away from the lower cover plate 210, and the upper positive pole mark 228 is arranged corresponding to the positive pole piece hole 224; go up negative pole sign 229, go up negative pole sign 229 and be located the one side that deviates from lower cover plate 210 of upper cover body 221, go up negative pole sign 229 and negative pole piece hole 225 and correspond the setting. The structural strength of the upper cover plate 220 may be improved by the first and

second ribs

226 and 227. The upper positive pole mark 228 and the upper negative pole mark 229 can play a role in prompting during assembly, and misassembly is avoided. The inboard of first protruding muscle 226 is provided with the buckle, and the inboard of second protruding muscle 227 is provided with the buckle, is convenient for like this be connected with the guard shield to play the guard action, and connect convenient and reliable.

In this embodiment, the battery module further includes: the positive electrode shield 610 is buckled at the positive electrode sheet hole 224, and the surface of the positive electrode shield 610 is provided with a positive electrode ejecting mark 611; the negative electrode shield 620 is buckled at the negative electrode sheet hole 225, and the surface of the negative electrode shield 620 is provided with a top negative electrode mark 621. The positive electrode sheet is protected by the positive electrode shield 610 and the negative electrode shield 620. In this embodiment, the positive shield 610 is clamped with the first rib 226, and the negative shield 620 is clamped with the second rib 227, so that the assembly and disassembly are convenient.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery module which characterized in that, battery module includes:

the end plate assembly comprises an injection molding structural part (110) and a metal structural part (120), and the number of the end plate assemblies is two;

a plurality of battery cells (310), the plurality of battery cells (310) being arranged side by side between two metal structural members (120) of two of the end plate assemblies;

an integrated cap plate disposed at an upper side of the plurality of unit batteries (310);

the pressing ribs (410) are pressed on the upper side of the integrated cover plate, and two ends of each pressing rib (410) are connected with the two metal structural members (120) of the two end plate assemblies in a one-to-one correspondence mode;

a strapping band (510), wherein the strapping band (510) is strapped to the two injection-molded structural members (110) of the two end plate assemblies and the outer surfaces of the plurality of unit cells (310).

2. The battery module according to claim 1, wherein the beads (410) comprise a rib (411) having a plurality of bends and a connecting piece (412) provided at an end of the rib (411), and an upper end of the metal structural member (120) is connected to the connecting piece (412) by a fastener.

3. The battery module according to claim 2,

the rib (411) is an integrally formed sheet metal part, and the rib (411) comprises a first folded plate, a second folded plate, a third folded plate, a fourth folded plate and a fifth folded plate which are sequentially connected, wherein the first folded plate, the third folded plate and the fifth folded plate are parallel to each other, the first folded plate and the fifth folded plate are abutted against the integrated cover plate, and the third folded plate and the integrated cover plate are arranged at intervals;

the rib pressing (410) further comprises a clamping head (413), the clamping head (413) protrudes and is arranged at the end part of the second folded plate and/or the end part of the fourth folded plate, a clamping groove (128) is formed in the upper end of the metal structural member (120), and the clamping head (413) is clamped in the clamping groove (128) of the metal structural member (120).

4. The battery module according to claim 1,

the injection-molded structural part (110) has a first side and a second side which are opposite to each other, the first side of the injection-molded structural part (110) is provided with a groove (111) for accommodating the packing belt (510), and the injection-molded structural part (110) is provided with an avoiding hole (112);

metal structure spare (120) are in including backup pad (121) and setting installation spare (122) of one side of backup pad (121), backup pad (121) set up the second side of the structure of moulding plastics (110), the upper end of backup pad (121) with the end connection of pressing muscle (410), installation spare (122) are passed dodge hole (112) and protrusion in the first side of the structure of moulding plastics (110).

5. The battery module according to claim 4,

along the extending direction of the belt groove (111), two ends of the belt groove (111) are respectively provided with a belt penetrating port for penetrating through a packing belt (510), the two belt penetrating ports are respectively positioned at two edges of the injection molding structural part (110), an arc-shaped transition surface (113) is arranged in each belt penetrating port, and the arc-shaped transition surface (113) is used for being matched with the bending position of the packing belt (510);

the strap threading opening is further provided with two opposite guide arc surfaces (114), the guide arc surfaces (114) are used for guiding the packing strap (510), the two guide arc surfaces (114) are respectively the end parts of two opposite side walls of the strap slot (111), the arc-shaped transition surface (113) is located between the two guide arc surfaces (114), and the arc-shaped transition surface (113) is the end part of the bottom wall of the strap slot (111).

6. The battery module according to claim 4, wherein the support plate (121) comprises a plate body (125) and a connecting plate (126) arranged at the upper end of the plate body (125), the plate body (125) is connected with the injection-molded structural member (110), at least a part of the connecting plate (126) protrudes from the top end of the injection-molded structural member (110), and the connecting plate (126) is connected with the end of the bead (410).

7. The battery module according to claim 1, wherein the integrated cap plate comprises:

the lower cover plate (210) comprises a lower cover body (211), the lower side of the lower cover body (211) is used for being matched with the single battery (310), the upper side of the lower cover body (211) is provided with a wiring groove (2111) for containing a wiring harness (231) and a clamping plate (212) arranged on the side wall of the wiring groove (2111), and the clamping plate (212) and the groove bottom of the wiring groove (2111) are arranged at intervals to clamp the wiring harness (231);

divide pole piece (232) and total pole piece (233), divide pole piece (232) and total pole piece (233) all set up the upside of lower cover body (211).

8. The battery module according to claim 7, wherein the plurality of the cards (212) is provided, the wiring groove (2111) has two opposite side walls, the plurality of the cards (212) are distributed on the two side walls of the wiring groove (2111), and the cards (212) on one side wall of the wiring groove (2111) and the cards (212) on the other side wall of the wiring groove (2111) are alternately arranged along the extending direction of the wiring groove (2111).

9. The battery module according to claim 7,

the wiring groove (2111) comprises a long groove and a plurality of short grooves, the plurality of short grooves are communicated with the long groove, the long groove extends along the length direction of the lower cover body (211), the plurality of short grooves extend along the width direction of the lower cover body (211), and the wiring harnesses (231) are distributed in the long groove and the plurality of short grooves;

the clamping plates (212) are distributed on the inner wall of the long groove and the inner walls of the short grooves.

10. The battery module according to claim 7,

the upper side of the lower cover body (211) is provided with a first mounting area and a second mounting area which are arranged at intervals, the first mounting area and the second mounting area both extend along the length direction of the lower cover body (211), the wiring groove (2111) is located between the first mounting area and the second mounting area, and the sub-pole piece (232) and the total pole piece (233) are distributed on the first mounting area and the second mounting area;

a plurality of first installation grooves (2112) are formed in the first installation area, each first installation groove (2112) is communicated with the wiring groove (2111), and one sub-pole piece (232) or one main pole piece (233) is installed in each first installation groove (2112);

the second installation area is internally provided with a plurality of second installation grooves (2113), each second installation groove (2113) is communicated with the wiring groove (2111), and each second installation groove (2113) is internally provided with one sub-pole piece (232).

11. The battery module according to claim 7,

the upper side of the lower cover body (211) is provided with a positive plate groove (2114) and a negative plate groove (2115), and the positive plate groove (2114) and the negative plate groove (2115) are respectively positioned at two ends of the lower cover body (211);

the lower cover plate (210) further comprises a lower positive pole mark (215) and a lower negative pole mark (216), the lower positive pole mark (215) is arranged corresponding to the positive pole piece groove (2114), and the lower negative pole mark (216) is arranged corresponding to the negative pole piece groove (2115);

the number of the total pole pieces (233) is two, the two total pole pieces (233) are respectively a positive total pole piece and a negative total pole piece, the positive total pole piece is arranged in the positive pole piece groove (2114), and the negative total pole piece is arranged in the negative pole piece groove (2115).

12. The battery module of claim 7, wherein the integrated cover plate further comprises:

the upper cover plate (220) comprises an upper cover body (221) and an upper convex edge (222) arranged on the periphery of the upper cover body (221) in a surrounding mode, and a plurality of clamping pieces (218) are distributed on the upper convex edge (222);

the periphery of the upper side of the lower cover body (211) is provided with a lower convex edge (217) in a surrounding mode, the lower convex edge (217) is provided with a plurality of clamping grooves (2221) in a distributed mode, and the clamping pieces (218) are clamped in the clamping grooves (2221) in a one-to-one corresponding mode;

the sub-pole pieces (232) and the total pole piece (233) are located between the upper cover body (221) and the lower cover body (211), and the beads (410) are pressed against the upper side of the upper cover body (221).

13. The battery module according to claim 12,

the press rib (410) is provided with a plurality of top vent holes (414), and the top vent holes (414) are arranged at intervals along the length direction of the press rib (410);

the upper cover plate (220) is provided with a mounting groove (2211), the mounting groove (2211) is positioned on one side of the upper cover plate (220) facing away from the lower cover plate (210), the mounting groove (2211) extends along the length direction of the upper cover plate (220), and the press rib (410) is arranged in the mounting groove (2211);

the upper cover (220) has a plurality of upper vent holes (223), and the plurality of upper vent holes (223) are provided at intervals in the longitudinal direction of the mounting groove (2211) on the bottom wall of the mounting groove (2211).

14. The battery module according to claim 12,

the number of the total pole pieces (233) is two, and the two total pole pieces (233) are a positive total pole piece and a negative total pole piece respectively;

the upper cover plate (220) comprises an upper cover body (221), the upper cover body (221) is provided with a positive plate hole (224) and a negative plate hole (225), the positive plate hole (224) and the negative plate hole (225) are respectively located at two ends of the upper cover body (221), the positive plate hole (224) corresponds to the positive total pole piece, and the negative plate hole (225) corresponds to the negative total pole piece.

15. The battery module according to claim 14, further comprising:

the positive electrode shield (610) is buckled at the positive electrode sheet hole (224), and the surface of the positive electrode shield (610) is provided with a positive electrode mark (611);

the negative electrode shield (620) is buckled at the negative electrode sheet hole (225), and the surface of the negative electrode shield (620) is provided with a top negative electrode mark (621).