CN106935747A - The battery modules of electric automobile - Google Patents

Abstract

The invention discloses a battery module group of an electric vehicle, which comprises a plurality of battery modules, a connecting piece connecting two adjacent battery modules in series, a screw and a fastener for locking the plurality of battery modules together, The sampling structure assembled on the battery module, the protective cover, and the protective plates located at both ends of the multiple battery modules, the battery module includes multiple batteries, a pair of brackets that cooperate with each other to fix the batteries, and a bus plate and a separator assembled on the brackets , the connection piece is connected to the manifold of two adjacent battery modules, the sampling structure includes a sampling circuit electrically connected to the manifold and a sampling bracket that fixes the sampling circuit and is assembled on the bracket, and the protective cover Cover the sampling circuit and the connecting sheet. The advantages of the battery module of the electric vehicle of the present invention are: 1) stable structure, 2) high safety, and 3) improved production efficiency.

Description

Battery modules for electric vehicles

【Technical field】

The invention relates to the technical field of new energy batteries, in particular to a battery module of an electric vehicle.

【Background technique】

With the increasingly severe energy and environmental problems, the country's strong support for new energy sources, and the maturity of key technologies for power batteries, power batteries have been widely used in automobiles. In the field of new energy batteries, one of the key technologies for the development of new energy vehicles is power batteries, and the safety of power batteries for new energy vehicles has always restricted the development of new energy vehicles. The current battery module structure does not fully fix the battery, which has low safety and reliability, and there are potential safety hazards.

In view of this, it is necessary to provide a new battery module for electric vehicles to overcome the deficiencies of the prior art.

【Content of invention】

The purpose of the present invention is to provide a battery module for electric vehicles with stable structure, high safety and high production efficiency.

In order to achieve the above object, the present invention provides a battery module for an electric vehicle, which includes a plurality of battery modules, a connecting piece connecting two adjacent battery modules in series, and a screw for locking the plurality of battery modules together As well as fasteners, a sampling structure assembled in the battery module, a protective cover and protective plates located at both ends of the plurality of battery modules, the battery module includes a plurality of batteries, a pair of brackets that cooperate together to fix the batteries, and a pair of brackets assembled in the brackets A manifold and a separator, the connecting piece connects the manifolds of two adjacent battery modules, the sampling structure includes a sampling circuit electrically connected to the manifold and a sampling bracket that fixes the sampling circuit and is assembled on the bracket , the protective cover covers the sampling circuit and the connecting piece.

As an improvement of the battery module of the electric vehicle of the present invention, the bracket includes a main body, a storage cavity that is recessed from the main body and accommodates the battery, and a plurality of positioning parts extending from the main body, and the positioning parts are provided with positioning holes for The screw passes through, and the fasteners are located at both ends of the screw and are nuts.

As an improvement of the battery module of the electric vehicle of the present invention, the bus plate includes a base plate assembled on the bracket and a connecting portion extending vertically from the base plate, the connecting portion includes a pair of first through holes and a pair of second through holes. hole.

As an improvement of the battery module of the electric vehicle of the present invention, the bracket includes a plurality of hooks extending from the body, a pair of fixing ribs and a fixing block assembled on the fixing ribs, the fixing block includes a pair of screw holes, The connecting portion of the manifold is adjacent to the fixing block, and the screw hole coincides with the first through hole of the connecting portion.

As an improvement of the battery module of the electric vehicle of the present invention, the connecting sheet is made of metal material, and includes fixing parts at both ends thereof and arc-shaped buffer parts connecting the fixing parts, and the fixing parts are provided with fixing holes, so The fixing hole coincides with the first through hole and the screw hole.

As an improvement of the battery module of the electric vehicle of the present invention, the sampling circuit includes a circuit board and a plurality of sampling soft boards connected to the circuit board, and the sampling soft board is fixed on the circuit board by SMT patches and includes A voltage sampling terminal and a temperature sampling terminal, the voltage sampling terminal is made of FPC and is L-shaped, and its free end is also provided with an embedded nickel sheet, and a third through hole is provided on the nickel sheet.

As an improvement of the battery module of the electric vehicle of the present invention, the sampling bracket includes a fixing part that fixes the circuit board and a support part that extends from the fixing part and supports the sampling soft board. The first side of the substrate, the substrate of the second side, a pair of reversible flip covers extending from the first side of the substrate, the first hook provided on the first side of the substrate, and the first hook spaced from the first hook. Fixing ribs, the second fixing ribs at the connection between the flip cover and the substrate, the circuit board is fixed to the substrate through the flip cover and the first hook, and the second fixing ribs are buckled with the hooks of the bracket fixed.

As an improvement of the battery module of the electric vehicle of the present invention, the support part extends from the second side of the substrate and includes an opposite first side, a second side and a third side connecting the two, the The support part includes a pair of first grooves respectively recessed from the first side and the second side, a fourth through hole communicating with the first groove, a notch on the third side, and third fixing parts on both sides of the notch. Ribs, the connection part of the manifold is accommodated in the first groove, the temperature sampling terminal extends from the gap to the surface of the cell, and the support part also includes There are a plurality of fourth fixing ribs on the side, and the fourth fixing ribs are buckled and fixed with the hooks of the bracket.

As an improvement of the battery module of the electric vehicle of the present invention, it also includes bolts passing through the fixing hole of the connecting piece, the first through hole of the bus plate, the screw hole of the fixing block and the rivet passing through the voltage sampling terminal The third through hole of the manifold, the second through hole of the manifold, and the fourth through hole of the support part.

As an improvement of the battery module of the electric vehicle of the present invention, the protective cover is made of insulating material and includes a body and a plurality of first hooks and second hooks extending from the edge of the body, the first hooks The hook is snap-fitted with the first fixing rib and the third fixing rib of the sampling bracket, and the second hook is snap-fitted with the fixing rib of the bracket.

Compared with the prior art, the battery module of the electric vehicle of the present invention has the advantages of: 1) stable structure, 2) high safety, and 3) improved production efficiency.

【Description of drawings】

FIG. 1 is a three-dimensional assembled view of a battery module of an electric vehicle according to the present invention.

FIG. 2 is a partially exploded perspective view of the battery module of the electric vehicle of the present invention.

3 is a perspective view of a manifold of a battery module of an electric vehicle according to the present invention.

FIG. 4 is a perspective view of a connecting piece of a battery module of an electric vehicle according to the present invention.

FIG. 5 is a three-dimensional exploded view of a sampling structure of a battery module of an electric vehicle according to the present invention.

6 is a partial perspective view of the battery module of the battery module of the electric vehicle according to the present invention.

7 is a partial perspective view of the battery module of the battery module of the electric vehicle according to the present invention.

【detailed description】

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

As shown in Fig. 1 and Fig. 2, the battery module 100 of the electric vehicle of the present invention includes a plurality of battery modules 1, a connecting piece 2 for connecting two adjacent battery modules 1 in series, and a connecting piece 2 for locking the battery modules 1 together. The screw 3 , the fastener 4 fixed at both ends of the screw 3 , the sampling structure 5 assembled in the battery module 1 , the protective cover 6 and the protective plates 7 located at both ends of the plurality of battery modules 1 .

The battery module 1 includes a plurality of cylindrical battery cells 10 , a pair of brackets 11 cooperating to accommodate the battery cells 10 , a bus plate 12 and a separator 13 assembled on the brackets 11 . The bracket 11 is made of insulating material such as plastic, and includes a body, a plurality of receiving cavities 111 recessed from the body to accommodate the battery cells 10 , and a plurality of positioning columns 112 extending from the body. The positioning columns 112 are provided with positioning holes 1120 .

The screw rod 3 passes through the positioning hole 1120 of the bracket 11 , so as to connect multiple battery modules 1 in series, and the fasteners 4 are fixed on both ends of the screw rod 3 . In this embodiment, the fastener 4 is a nut.

As shown in FIG. 3 , the bus plate 12 is made of metal material, and it includes a base plate 121 assembled on the bracket 11 and a connecting portion 122 vertically extending from the base plate 121. The connecting portion 122 includes a pair of first through holes 1221 and a pair of second through holes. Two through holes 1222 . The connecting portion 122 of the bus plate 12 is the positive or negative terminal of the battery module 1 . The bracket 11 includes positive or negative signs assembled on the body.

As shown in FIG. 2 , the bracket 11 includes a pair of fixing ribs 113 extending from the body and a fixing block 114 assembled on the fixing ribs 113 . The fixing block 114 includes a pair of screw holes 1140 . The fixing block 114 is adjacent to the connecting portion 122 of the manifold 12 , and the screw hole 1140 coincides with the first through hole 1221 .

The connecting sheet 2 is made of metal material, such as multi-layer copper foil or aluminum foil by hot pressing. As shown in Figure 4, the connecting piece 2 includes a fixed part 21 located at its two ends and an arc-shaped buffer part 22 connecting the fixed part 21. The fixed part 21 is provided with a fixing hole 210, and the arc-shaped buffer part 22 can play an absorbing role when vibrating. Can buffer. The connection piece 2 connects the connection portions 122 of the bus plates 12 of two adjacent battery modules 1 . The fixing hole 210 coincides with the first through hole 1221 of the manifold 12 . As shown in FIG. 2 , the battery module 100 of the electric vehicle of the present invention also includes bolts 8 passing through the fixing holes 210 of the connecting piece 2 , the first through holes 1221 of the manifold 12 and the screw holes 1140 of the fixing block 114 for fixing.

As shown in FIG. 5 , the sampling structure 5 includes a sampling circuit 51 electrically connected to the bus board 2 and a plurality of sampling brackets 52 capable of fixing the sampling circuit 51 and assembled on the bracket 11 .

The sampling circuit 51 includes a circuit board 511 and a plurality of sampling soft boards 512 connected to the circuit board 511 . The sampling flexible board 512 is fixed on the circuit board 511 by means of SMT patches, and includes a voltage sampling terminal 5121 and a temperature sampling terminal 5124 . The voltage sampling terminal 5121 is made of FPC and is L-shaped, and its free end is provided with an embedded nickel sheet 5122 , and a third through hole 5123 is provided on the nickel sheet 5122 . The temperature sampling terminal 5124 is made of soft material and has a long strip shape.

The sampling bracket 52 includes a fixing portion 521 for fixing the circuit board 511 and a supporting portion 522 extending from the fixing portion 521 and supporting the sampling flexible board 512 . The fixing part 521 includes a base plate 5211 having opposite first and second sides, a pair of reversible flip covers 5212 extending from the first side of the base plate 5211, and a first hook 5213 provided on the first side of the base plate 5211 , the first fixing rib 5214 spaced apart from the first hook 5213 , and the second fixing rib 5215 located at the joint between the flip cover 5212 and the base plate 5211 . The circuit board 511 is fixed on the base plate 5211 and fixed by the flip cover 5212 and the first hook 5213 .

The support portion 522 extends from the second side of the substrate 5211 and includes a first side, a second side and a third side connecting them. The support portion 522 includes a pair of first grooves 5221 recessed from the first side and the second side respectively, a fourth through hole 5222 communicating with the first groove 5221, a notch 5223 on the third side, and a notch 5223 on the notch 5223. The third fixing ribs 5224 on both sides. The support portion 522 further includes a plurality of fourth fixing ribs 5225 located on the first side and the second side.

As shown in FIG. 6 , the connecting portion 122 of the manifold 12 is accommodated in the first groove 5221 . The battery module 100 of the electric vehicle of the present invention also includes a rivet 9 passing through the third through hole 5123 of the voltage sampling terminal 5121, the second through hole 1222 of the manifold 12, and the fourth through hole 5222 of the support part 522 and passing through the laser spot The welding order voltage sampling terminal 5121 is electrically connected to the bus board 12 . The temperature sampling terminal 5122 extends from the notch 5223 of the support portion 522 to the surface of the cell 10 to detect temperature.

As shown in FIG. 6 , the bracket 11 includes a plurality of hooks 115 extending from the body, and the hooks 115 are snapped and fixed with the second fixing rib 5215 and the fourth fixing rib 5225 of the sampling bracket 52 . The sampling bracket 52 completely fixes the sampling circuit 51 , thereby avoiding the risk of a short circuit between the connecting piece 2 and the sampling circuit 51 .

As shown in FIG. 2 and FIG. 7 , the protective cover 6 is made of insulating material such as plastic, and includes a body 61 and a plurality of first hooks 611 and second hooks 612 extending from the edge of the body 61 . The first hook 611 snap fits with the first fixing rib 5214 and the third fixing rib 5224 of the sampling bracket 52 , and the second hook 612 snaps fits with the fixing rib 113 of the bracket 11 .

When assembling, the first step is to assemble the battery module 1, the fixing block 114 is assembled on the bracket 11, the battery cell 10 is assembled on the two brackets 11, the two manifolds 12 are respectively assembled on the two brackets 11, and the battery cell is assembled by spot welding. The electrodes of 10 are connected to the bus plate 12, the separator 13 is assembled on the bracket 11, and the positive and negative pole signs are assembled on the bracket 11; in the second step, a plurality of battery modules 1 are arranged in sequence, and the protective plates 7 are installed at both ends, and the screw rod 3 passes through the Positioning holes 1120 connect multiple battery modules 1 in series and fix them with fasteners 4; the third step is to assemble the sampling bracket 52, the second fixing rib 5215 and the fourth fixing rib 5225 of the sampling bracket 52 and the clamping bracket 11 The hook 115 is buckled and fixed; the fourth step is to assemble the connecting piece 2, and the connecting piece 2 is fixed to the connection part 122 of the manifold 12 through the bolt 8; the fifth step is to assemble the sampling circuit 51, and the circuit board 511 passes through the flip cover 5212 and the first The hook 5213 is fixed on the substrate 5211, the voltage sampling terminal 5121 is welded to the connection part 122 of the manifold 12 through the rivet 9, and the temperature sampling terminal 5122 extends from the gap 5223 of the support part 522 to the surface of the cell 10; the sixth step is to assemble the protective cover 6. The first hook 611 of the protective cover is snap-fitted with the first fixing rib 5214 and the third fixing rib 5224 of the sampling bracket 52, and the second hook 612 is snap-fitted with the fixing rib 113 of the bracket 11, so that the protective cover 6 to cover the connecting piece 2 and the connection part 122 of the bus plate 12 and the sampling circuit 51, so as to play the role of insulation and protection.

The battery module of the electric vehicle has a stable structure, high safety, convenient assembly and disassembly, and easy expansion.

The battery module of the electric vehicle of the electric vehicle of the present invention is not limited to the description in the description and the implementation, so for those familiar with the field, other advantages and modifications can be easily realized, so without departing from the claims and equivalents The invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without limiting the spirit and scope of the general concepts defined herein.

Claims (10)

1. A battery module for an electric vehicle, characterized in that it includes a plurality of battery modules, a connecting piece connecting two adjacent battery modules in series, a screw for locking the plurality of battery modules together, and a fastening components, a sampling structure assembled in the battery module, a protective cover, and protective plates located at both ends of the plurality of battery modules, the battery module includes a plurality of batteries, a pair of brackets that work together to fix the batteries, and a manifold assembled in the brackets, The separator, the connecting piece connects the manifolds of two adjacent battery modules, the sampling structure includes a sampling circuit electrically connected to the manifold and a sampling bracket that fixes the sampling circuit and is assembled in the bracket, the The protective cover covers the sampling circuit and the connecting piece. 2. The battery module of an electric vehicle according to claim 1, wherein the bracket comprises a main body, a storage chamber recessed from the main body and containing the battery, and a plurality of positioning parts extending from the main body, the positioning Positioning holes are provided at the top for the screw to pass through, and the fasteners are located at both ends of the screw and are nuts. 3. The battery module of an electric vehicle according to claim 2, wherein the manifold includes a base plate assembled on the bracket and a connecting portion extending vertically from the base plate, the connecting portion includes a pair of first through holes and a pair of second through holes. 4. The battery module of an electric vehicle according to claim 3, wherein the bracket includes a plurality of hooks extending from the body, a pair of fixing ribs and a fixing block assembled on the fixing ribs, and the fixing block It includes a pair of screw holes, the connection part of the manifold is adjacent to the fixing block, and the screw holes coincide with the first through hole of the connection part. 5. The battery module of an electric vehicle according to claim 4, wherein the connecting piece is made of metal material, and includes fixing parts at both ends thereof and arc-shaped buffer parts connecting the fixing parts, and the fixing parts A fixing hole is provided, and the fixing hole coincides with the first through hole and the screw hole. 6. The battery module of an electric vehicle according to claim 5, wherein the sampling circuit includes a circuit board and a plurality of sampling soft boards connected to the circuit board, and the sampling soft boards are fixed by means of SMT patches It is on the circuit board and includes a voltage sampling terminal and a temperature sampling terminal. The voltage sampling terminal is made of FPC in an L-shape and its free end is provided with an embedded nickel sheet, and a third through hole is provided on the nickel sheet. 7. The battery module of an electric vehicle according to claim 6, wherein the sampling bracket includes a fixing part for fixing the circuit board and a support part extending from the fixing part and supporting the sampling soft board, so The fixed part includes a base plate with opposite first side and second side, a pair of reversible flip covers extending from the first side of the base, a first hook on the first side of the base, and a first hook. The first fixing ribs arranged at intervals, the second fixing ribs located at the connection between the flip cover and the substrate, the circuit board is fixed to the substrate through the flip cover and the first hooks, the second fixing ribs and the The hook of the bracket is buckled and fixed. 8. The battery module of an electric vehicle according to claim 7, wherein the support portion extends from the second side of the substrate and includes an opposite first side, a second side and a second side connecting the two Three sides, the support part includes a pair of first grooves recessed from the first side and the second side respectively, a fourth through hole communicating with the first groove, a notch on the third side and a notch on the notch The third fixing rib on both sides, the connection part of the manifold is accommodated in the first groove, the temperature sampling terminal extends from the gap to the surface of the battery cell, and the support part also includes a A plurality of fourth fixing ribs on the side and the second side, the fourth fixing ribs are buckled and fixed to the hooks of the bracket. 9. The battery module of an electric vehicle as claimed in claim 8, further comprising bolts passing through the fixing holes of the connecting piece, the first through hole of the manifold, the screw holes of the fixing block and the rivets passing through the voltage The third through hole of the sampling terminal, the second through hole of the manifold, and the fourth through hole of the support part. 10. The battery module of an electric vehicle according to claim 9, wherein the protective cover is made of insulating material and includes a body and a plurality of first hooks and second hooks extending from the edge of the body , the first hook is snap-fitted with the first fixing rib and the third fixing rib of the sampling bracket, and the second hook is snap-fitted with the fixing rib of the bracket.