CN206312975U - A kind of battery modules - Google Patents

Abstract

The utility model provides a battery module, which includes a positive busbar, a positive receiving plate, a negative busbar, a negative receiving plate and a plurality of batteries; the positive connecting busbar includes a plurality of connection protrusions, and the positive receiving plate includes a first The surface and the second surface, the first surface is provided with a plurality of receiving grooves, the second surface is provided with a plurality of communication holes connecting the receiving grooves; the second surface of the positive receiving plate is against the positive busbar and connected with the positive busbar Fixed connection, the connecting protrusion is inserted into a corresponding communication hole and partly passes through the communication hole; the negative electrode bus bar includes a base plate and a bus plate fixedly connected to the base plate, and the bus bar includes a plurality of claw buckle units; the negative electrode receiving plate includes a third surface, The fourth surface and the receiving hole passing through the third surface and the fourth surface, the fourth surface abuts against the base plate and is fixedly connected with the base plate, and the hook unit is received in a corresponding receiving hole.

Description

A battery module

【Technical field】

The utility model relates to the technical field of batteries, in particular to a battery module.

【Background technique】

As the power core of the electric vehicle, the battery module is a very important part of the entire electric vehicle. The reliability of the connection between the batteries in the battery module is related to the safety of the entire vehicle. At present, the common connection methods of batteries are copper strip welding or welding screws and bolts at both ends of the battery. These two methods have the following problems: the assembly efficiency is low, and each battery needs to be welded; when welding the negative electrode of the battery steel case, due to the battery The negative electrode of the steel shell is thin, which has the risk of penetration and is easy to cause damage to the battery; the entire module needs to be replaced during maintenance, resulting in a great waste of materials or manpower.

In view of this, it is necessary to provide a new type of battery module to overcome the above defects.

【Content of utility model】

The purpose of the utility model is to provide a battery module which adopts a detachable elastic connection scheme, increases connection reliability and improves assembly and maintenance efficiency.

In order to achieve the above purpose, the utility model provides a battery module, including a positive busbar, a positive storage plate, a negative busbar, a negative storage plate and a plurality of batteries;

The positive bus bar has a plurality of perforations and includes a plurality of connecting protrusions, each connecting protrusion surrounds a corresponding perforation; the positive receiving plate includes a first surface and a second surface opposite to each other, and the first surface A plurality of receiving grooves are provided, and the second surface is provided with a plurality of communication holes corresponding to each other and communicating with the receiving grooves; the second surface abuts against the positive busbar, and each connecting protrusion is inserted into a corresponding The communication hole is accommodated in the corresponding accommodation groove;

The negative bus plate includes a base plate and a bus bar fixedly connected to the base plate, the bus bar includes a plurality of claw buckle units, and each claw buckle unit includes a main body and a plurality of connecting pieces extending from the main body and a plurality of claws; the main body leans against and is electrically connected to the substrate; the claw unit is connected to the adjacent claw unit through the connecting piece; the negative receiving plate includes The third surface and the fourth surface of the third surface and the fourth surface, and a plurality of receiving holes through the third surface and the fourth surface; The sheet is accommodated in one of the receiving holes;

Each battery includes a positive electrode cap, a negative electrode casing, and a crown spring fixedly connected to the positive electrode cap; the positive electrode cap is accommodated in a corresponding receiving groove, and the crown spring is inserted and electrically connected to the connecting protrusion; The end of the negative electrode casing away from the positive electrode cap is accommodated in a corresponding receiving hole and is electrically connected to a plurality of claw pieces corresponding to one of the claw buckle units.

In a preferred embodiment, the fourth surface of the negative electrode receiving plate is against the substrate and fixedly connected with the substrate, grooves are provided on the edge of each receiving hole on the fourth surface, and each connecting piece It is accommodated in a corresponding one of the grooves.

In a preferred embodiment, the crown spring includes a top arc portion, a bottom arc portion, and a plurality of elastic arms connected to the top arc portion and the bottom arc portion and arranged at intervals; the bottom end The arc portion is welded to the positive cap; the elastic arm is arc-shaped and bends in a direction away from the central axis of the top arc portion and the bottom arc portion.

In a preferred embodiment, each connection protrusion is formed by extending from the edge corresponding to one of the perforations in a direction perpendicular to the positive busbar; the number of the connection protrusions is the same as that of the communication holes and one One corresponding distribution; the connecting protrusion is hollow cylindrical, the receiving groove and the communication hole are both cylindrical and coaxially arranged; the outer diameter of the connecting protrusion is less than or equal to the diameter of the communication hole , the inner diameter is less than or equal to the maximum diameter of the crown spring.

In a preferred embodiment, the claw piece is formed by extending from the corresponding main body portion to a direction perpendicular to the main body portion, and a plurality of the claw pieces of each claw buckle unit correspond to one of the main body portions. The center bends to form an arc.

In a preferred embodiment, the bus sheet further includes a hollow hole surrounded by a plurality of adjacent hook units.

In a preferred embodiment, the number of the connecting piece and the claw piece of each claw buckle unit are equal and arranged at intervals.

In a preferred embodiment, the accommodating hole is in the shape of a cylinder, and a plurality of claws of each claw unit encloses a circular accommodating space in cross section, and the end of the negative electrode case away from the positive electrode cap is located at The containment space.

In a preferred embodiment, the substrate is provided with a plurality of through holes penetrating the substrate, and the center of the main body part is provided with a positioning hole, and the number of the through holes is the same as that of the positioning holes and they are distributed in one-to-one correspondence.

In a preferred embodiment, the positive busbar further includes a first installation protrusion extending from a part of the edge of the positive busbar, and the first installation protrusion runs through the first installation protrusion. The first installation hole; the substrate further includes a second installation protrusion extending from the edge of the substrate portion, and the second installation protrusion defines a second installation hole penetrating through the second installation protrusion.

In the battery module provided by the utility model, the positive electrode cap of the battery is provided with a crown spring, which can elastically cooperate with the connection protrusion arranged on the positive electrode busbar; The negative electrode casing is interference fit and elastically connected. In addition, the two ends of the battery are respectively accommodated in the accommodation plate, making the connection safer and more reliable. The battery module also effectively reduces contact resistance and improves assembly and maintenance efficiency.

【Description of drawings】

FIG. 1 is a schematic perspective view of the three-dimensional structure of the partially assembled battery module provided by the present invention.

FIG. 2 is a schematic perspective view of the positive busbar of the battery module shown in FIG. 1 .

FIG. 3 is a schematic perspective view of the positive electrode receiving plate of the battery module shown in FIG. 1 .

FIG. 4 is a schematic perspective view of the assembled positive electrode busbar and positive electrode receiving plate of the battery module shown in FIG. 1 .

FIG. 5 is a schematic perspective view of the negative electrode busbar of the battery module shown in FIG. 1 .

FIG. 6 is a schematic perspective view of the negative electrode receiving plate of the battery module shown in FIG. 1 .

FIG. 7 is a schematic perspective view of the assembled negative electrode busbar and negative electrode receiving plate of the battery module shown in FIG. 1 .

【detailed description】

In order to make the purpose, technical solution and beneficial technical effects of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the utility model, not for limiting the utility model.

Please refer to FIG. 1 , the present invention provides a new battery module 100 , which includes a positive bus bar 10 , a positive receiving plate 20 , a negative bus bar 30 , a negative receiving plate 40 and a plurality of batteries 50 . Specifically, the positive bus bar 10 is fixedly connected to the positive receiving plate 20 , and the negative bus bar 30 is fixedly connected to the negative receiving plate 40 . The positive bus bar 10 and the negative bus bar 30 are arranged in parallel at intervals, and the positive receiving plate 20 and the negative receiving plate 40 are located between the positive bus bar 10 and the negative bus bar 30 and relative intervals. The battery 50 is disposed between the positive electrode receiving plate 20 and the negative electrode receiving plate 40 , and includes a positive electrode cap 51 , a negative electrode casing 52 and a crown spring 53 fixedly connected to the central protrusion of the positive electrode cap 51 . The crown spring 53 of each battery 50 is electrically connected to the positive busbar 10 , and the negative case 52 is electrically connected to the negative busbar 30 . Specifically, the crown spring 53 includes a top arc portion 531 , a bottom arc portion 532 and a plurality of elastic arms 533 connected to the top arc portion 531 and the bottom arc portion 532 and arranged at intervals. The bottom arc portion 531 is welded to the positive electrode cap 51 , the elastic arm 533 is arc-shaped and bends in a direction away from the central axes of the top arc portion 531 and the bottom arc portion 532 .

Please refer to FIG. 2, FIG. 3 and FIG. 4 together. The positive busbar 10 has a plurality of perforations 11 through the positive busbar 10 and includes a plurality of connecting protrusions 12, each connecting protrusion 12 surrounds Corresponding to one perforation 11 . Specifically, each connecting protrusion 12 is formed by extending from the edge of the corresponding through hole 11 in a direction perpendicular to the positive busbar 10 . The positive electrode storage plate 20 includes a first surface 21 and a second surface 22 opposite to the first surface 21, the first surface 21 is provided with a plurality of storage grooves 211, and the second surface 22 is provided with a plurality of There are two communication holes 221 corresponding to the receiving grooves 211 and communicating with the receiving grooves 211 . Specifically, the connecting protrusion 12 is located on a side close to the positive receiving plate 20 , and the second surface 22 is against the positive bus bar 10 . The number of the connection protrusions 12, the communication holes 221 and the receiving grooves 211 are the same and correspondingly distributed. Each connection protrusion 12 is inserted into a corresponding communication hole 221 and partly passes through the communication hole 221 to be accommodated in the corresponding communication hole 221. in the storage tank 211.

In this embodiment, the connecting protrusion 12 is a hollow cylinder, and the communication hole 221 and the receiving groove 211 are both cylindrical and coaxially arranged. The outer diameter of the connecting protrusion 12 is smaller than or equal to the diameter of the communication hole 221 , and the inner diameter is smaller than or equal to the maximum diameter of the crown spring 53 .

Please refer to FIG. 5 , the negative busbar 30 includes a base plate 31 and a bus piece 32 fixedly connected to the base plate 31 . The busbar 32 includes a plurality of hook units 321 and a hollow hole 322 surrounded by a plurality of adjacent hook units 321 . Each hook unit 321 includes a main body portion 3211 , a plurality of connecting pieces 3212 and a plurality of claw pieces 3213 extending from the main body portion 3211 . Specifically, the main body portion 3211 leans against the substrate 31 and is electrically connected to the substrate 31 . The claw unit 321 is connected to the adjacent claw unit 321 through the connecting piece 3212 . The claw piece 3213 is formed by extending from the main body portion 3211 in a direction perpendicular to the main body portion 3211 and away from the base plate 31 . A plurality of claws 3213 extending from one main body 3211 are bent toward the center of the main body 3211 to form an arc.

Further, the substrate 31 is provided with a plurality of through holes 311 penetrating through the substrate 31, and a positioning hole 3214 is provided in the center of each main body portion 3211, and the number of the through holes 311 and the positioning holes 3214 are the same and one One-to-one correspondence distribution ensures reliable connections.

Please refer to FIG. 6 and FIG. 7, the negative electrode containing plate 40 includes a third surface 41 and a fourth surface 42 opposite to the third surface 41, and has a For the receiving holes 43 on the surface 42 , grooves 421 are formed on edges of each receiving hole 43 on the fourth surface. The number of the receiving holes 43 and the claw units 321 are the same and they are distributed in one-to-one correspondence. The fourth surface 42 abuts against the base plate 31 and is fixedly connected with the base plate 31. The bus bar 32 is located on the base plate 31 Between the base plate 31 and the negative electrode receiving plate 40 , each claw unit 321 is received in a corresponding one of the receiving holes 43 , and the connecting piece 3212 is received in the corresponding groove 421 .

In this embodiment, the battery 50 is cylindrical, and the receiving hole 42 is cylindrical and has a diameter greater than or equal to that of the battery 50 . The number of the connecting pieces 3212 and the claw pieces 3213 of each claw unit 321 are equal and arranged at intervals, and the multiple claw pieces 3213 of each claw unit 321 enclose a receiving space with a circular cross section .

Further, the positive bus bar 10 also includes a first installation protrusion 13 extending from a part of the edge of the positive bus bar 10 , and the first installation protrusion 13 is opened with a hole extending through the first installation protrusion. The first installation hole 131 of the part 13. The base plate 31 further includes a second mounting protrusion 312 extending from a part of the edge of the base plate 31 , and the second mounting protrusion 312 defines a second mounting hole 3121 penetrating through the second mounting protrusion 312 .

During assembly, the positive receiving plate 20 and the negative receiving plate 40 are fixedly connected to the positive bus bar 10 and the negative bus bar 30 respectively, and are located between the positive bus bar 10 and the negative bus bar. The rows 30 are arranged oppositely with intervals. The positive electrode cap 51 of the battery 50 is accommodated in the receiving groove 211, the crown spring 53 is inserted into the connection protrusion 12 and is electrically connected with the connection protrusion 12; the negative electrode casing 52 of the battery 50 is away from One end of the positive electrode cap 51 is received in the receiving hole 43 and is electrically connected to the plurality of claw pieces 3213 of the corresponding claw unit 321 .

In the battery module provided by the utility model, the positive electrode cap of the battery is provided with a crown spring, which can elastically cooperate with the connection protrusion arranged on the positive electrode busbar; The negative electrode casing is interference fit and elastically connected. In addition, the two ends of the battery are respectively accommodated in the accommodation plate, making the connection safer and more reliable. The battery module also effectively reduces contact resistance and improves assembly and maintenance efficiency.

The utility model is not limited to the description in the description and the implementation, so those skilled in the art can easily realize additional advantages and modifications, so without departing from the spirit and general concept defined by the claims and equivalent scope Without limitation, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (10)

1. A battery module, characterized in that: comprising a positive busbar, a positive receiving plate, a negative busbar, a negative receiving plate and a plurality of batteries; The positive bus bar has a plurality of perforations and includes a plurality of connecting protrusions, each connecting protrusion surrounds a corresponding perforation; the positive receiving plate includes a first surface and a second surface opposite to each other, and the first surface A plurality of receiving grooves are provided, and the second surface is provided with a plurality of communication holes corresponding to each other and communicating with the receiving grooves; the second surface abuts against the positive busbar, and each connecting protrusion is inserted into a corresponding The communication hole is accommodated in the corresponding accommodation groove; The negative bus plate includes a base plate and a bus bar fixedly connected to the base plate, the bus bar includes a plurality of claw buckle units, and each claw buckle unit includes a main body and a plurality of connecting pieces extending from the main body and a plurality of claws; the main body leans against and is electrically connected to the substrate; the claw unit is connected to the adjacent claw unit through the connecting piece; the negative receiving plate includes The third surface and the fourth surface of the third surface and the fourth surface, and a plurality of receiving holes through the third surface and the fourth surface; The sheet is accommodated in one of the receiving holes; Each battery includes a positive electrode cap, a negative electrode casing, and a crown spring fixedly connected to the positive electrode cap; the positive electrode cap is accommodated in a corresponding receiving groove, and the crown spring is inserted and electrically connected to the connecting protrusion; The end of the negative electrode casing away from the positive electrode cap is accommodated in a corresponding receiving hole and is electrically connected to a plurality of claw pieces corresponding to one of the claw buckle units. 2. The battery module according to claim 1, wherein the fourth surface of the negative electrode receiving plate abuts against the substrate and is fixedly connected with the substrate, and each receiving hole on the fourth surface Grooves are provided on the edges, and each connecting piece is accommodated in a corresponding one of the grooves. 3. The battery module according to claim 1, wherein the crown spring comprises a top arc portion, a bottom arc portion, and is connected to the top arc portion and the bottom arc portion and arranged at intervals. a plurality of elastic arms; the bottom arc portion is welded to the positive cap; the elastic arm is arc-shaped and protrudes in a direction away from the central axis of the top arc portion and the bottom arc portion bending. 4. The battery module according to claim 1, wherein each connection protrusion is formed by extending from the edge corresponding to one of the perforations in a direction perpendicular to the positive busbar; the connection protrusions The number of the communication holes is the same and distributed in one-to-one correspondence; the connection protrusion is a hollow cylinder, and the receiving groove and the communication hole are both cylindrical and coaxially arranged; the outer surface of the connection protrusion The diameter is less than or equal to the diameter of the communication hole, and the inner diameter is less than or equal to the maximum diameter of the crown spring. 5. The battery module according to claim 1, wherein the claws are formed by extending from the corresponding main body in a direction perpendicular to the main body, and the plurality of claws of each claw unit The claw pieces are bent toward the center of the corresponding one of the main body parts to form an arc. 6 . The battery module according to claim 1 , wherein the busbar further comprises a hollow hole surrounded by a plurality of adjacent claw units. 7 . 7 . The battery module according to claim 1 , wherein the number of the connecting piece and the claw piece of each claw unit are equal and intersecting and spaced apart. 8 . 8. The battery module according to claim 1, characterized in that: the storage hole is cylindrical, and a plurality of claw pieces of each claw unit encloses a storage space with a circular cross section, and the negative electrode An end of the housing away from the positive cap is located in the accommodation space. 9. The battery module according to claim 1, wherein the substrate is provided with a plurality of through holes passing through the substrate, the center of the main body part is provided with a positioning hole, and the through holes are connected to the positioning holes. The same number and one-to-one correspondence distribution. 10. The battery module according to claim 1, wherein the positive busbar further comprises a first installation protrusion extending from a part of the edge of the positive busbar, and the first installation protrusion A first installation hole is opened through the first installation protrusion; the substrate also includes a second installation protrusion extending from the edge of the substrate part, and the second installation protrusion is opened through the second installation hole. The second mounting hole of the convex part.