CN207233816U - A kind of battery pack - Google Patents

Abstract

A battery pack, including a battery box, a battery module and a plurality of fixing plates, the battery module includes a plurality of battery modules and a plurality of flexible connection busbars; each battery module includes two fixing brackets, a plurality of single cells, Two manifolds and two insulating protection plates, each fixing bracket includes an upper surface and a lower surface; each fixing bracket includes a first side wall and a second side wall, the first side wall is provided with two clamping blocks, and the second There are two card slots on the two side walls, and the two adjacent battery modules are connected and fixed by the card blocks and the card slots; the two manifolds are respectively fixedly connected to the lower surfaces of the two fixing brackets; the two insulating protection plates are respectively It is fixedly connected to two fixed brackets, and each insulating protection plate is located on the side of a corresponding manifold away from the corresponding fixed bracket; the two ends of each flexible connection busbar are respectively connected to the two adjacent battery modules. The bus board is electrically connected.

Description

a battery pack

【Technical field】

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

【Background technique】

The power source of an electric vehicle is a battery pack, which includes a battery module and a battery box. The battery module uses a fixing bracket to fix multiple single cells to realize series/parallel connection between multiple single cells, so as to obtain a larger battery capacity. However, the fixing brackets of the existing battery modules are not very versatile, and different battery modules need to redesign the unique fixing brackets. Because the mold opening cycle, material procurement cycle, and module assembly cycle of the fixing brackets are very long, Time wasted and the existing fixing brackets were inconvenient to assemble.

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

【Content of utility model】

The purpose of the utility model is to provide a battery pack in which battery modules can be freely combined.

In order to achieve the above purpose, the utility model provides a battery pack, including a battery box, a battery module, and a plurality of fixing plates for fixing the battery module in the battery box, and the battery module includes a plurality of battery modules and Multiple soft connection busbars;

Each battery module includes two fixing brackets, a plurality of single cells, two manifolds and two insulating protection plates, each fixing bracket includes an upper surface and a lower surface opposite to each other, and the two ends of each single battery are respectively inserted into the upper surfaces of the two fixing brackets; each fixing bracket includes opposite first side walls and second side walls, and two A clamping block, two clamping slots are provided on a surface of the second side wall away from the first side wall, and two adjacent battery modules are engaged by the two clamping blocks and the two clamping slots connected and fixed; the two manifolds are respectively fixedly connected to the lower surfaces of the two fixed brackets;

The two insulating protection plates are respectively fixedly connected to the two fixing brackets, and each insulating protecting plate is located on the side of the corresponding manifold away from the lower surface of the corresponding fixing bracket;

Both ends of each flexible connection bus bar are electrically connected to two bus plates of two adjacent battery modules.

In a preferred embodiment, a plurality of installation holes are opened on the upper surface, the plurality of installation holes are arranged in a line, each installation hole is circular and has a size corresponding to a single battery, and each single battery The two ends of the two fixing brackets are respectively inserted into the corresponding mounting holes of the two fixing brackets.

In a preferred embodiment, each single battery includes a positive terminal and a negative terminal, the positive terminals of multiple single batteries of each battery module are inserted into a corresponding mounting hole of a fixing bracket, and the negative terminals are inserted into the The other fixing bracket corresponds to a mounting hole.

In a preferred embodiment, at least one connecting screw hole is opened on the lower surface, and at least one positioning post is formed by protruding from the lower surface in a direction away from the upper surface; each busbar includes a busbar , the busbar is rectangular and provided with at least one first through hole and at least one second throughhole; each positioning column on each fixing bracket is inserted into a corresponding second throughhole on a corresponding busbar, and then Screws are used to sequentially pass through a corresponding first through hole and a corresponding connecting screw hole to lock and fix each manifold plate on the lower surface of a corresponding fixing bracket.

In a preferred embodiment, the bus plate further includes a bus sheet, the bus sheet is rectangular and fixedly connected to a surface of the bus substrate; the bus sheet is provided with a plurality of installation holes One-to-one correspondence of the elastic pieces, each elastic piece is tilted away from the direction of the bus substrate, and the plurality of elastic pieces are inserted into a corresponding installation hole and further electrically connected with a corresponding single battery.

In a preferred embodiment, a fixed nut is fixedly connected to both ends of a surface of the busbar provided with the busbar, and each flexible connection busbar is made of a metal material and has a One perforation; use a screw to pass through one of the perforations of the flexible connection busbar in turn, and lock and fix a fixing nut on a manifold of a battery module, and then use another screw to pass through the flexible connection busbar in turn. The other through hole and a fixing nut of a manifold of another battery module are locked and fixed to electrically connect the two manifolds of two adjacent battery modules.

In a preferred embodiment, a limit block is respectively provided on a surface of the first side wall close to the second side wall and a surface of the second side wall close to the first side wall, so The limiting block is in the shape of a cuboid, and two buckles are respectively provided on the edges of the first side wall and the second side wall away from the upper surface, and each insulating protection plate is inserted into a corresponding fixing bracket. between the two limit blocks and the two buckles and be clamped and fixed.

In a preferred embodiment, a fixing hole is provided at both ends of each fixing bracket; each fixing plate is T-shaped and one surface protrudes away from the fixing plate to form two limiting columns, The two limiting posts are arranged at intervals and respectively inserted into the fixing holes of the two fixing brackets of the two adjacent battery modules for fixing.

In a preferred embodiment, the battery box is provided with a plurality of mounting screw holes, and each fixing plate is provided with a connection hole, and then the screws are sequentially passed through the corresponding connection hole and the corresponding installation screw hole to connect the The battery module is locked and fixed in the battery box.

The fixed bracket provided in the battery pack provided by the utility model can be combined freely, thereby adapting to different needs, without remaking a unique fixed bracket, which saves time such as procurement cycle and production cycle, and is easy to disassemble, which is beneficial to after-sales and maintenance. The battery module of the battery pack provided by the utility model is a cuboid and takes up little space.

【Description of drawings】

FIG. 1 is a schematic diagram of the three-dimensional structure of the battery pack provided by the present invention.

FIG. 2 is an exploded view of the battery pack shown in FIG. 1 .

FIG. 3 is an assembly diagram of a battery module and a fixing plate of the battery pack shown in FIG. 1 .

FIG. 4 is a top view of the assembly of the battery module and the fixing plate shown in FIG. 3 .

FIG. 5 is a schematic perspective view of the two battery modules of the battery module shown in FIG. 3 .

FIG. 6 is a schematic perspective view of the three-dimensional structure of the two battery modules shown in FIG. 5 without the insulation protection plate.

FIG. 7 is an exploded view of a portion of a battery module shown in FIG. 6 .

FIG. 8 is a schematic perspective view of the fixed bracket of the battery module shown in FIG. 7 .

FIG. 9 is a schematic three-dimensional structural view from another perspective of the fixing bracket of the battery module shown in FIG. 8 .

FIG. 10 is a partial enlarged view of the three-dimensional structure diagram area A of another viewing angle of the fixing bracket shown in FIG. 9 .

FIG. 11 is an exploded view of a bus plate of the battery module shown in FIG. 7 .

【Detailed ways】

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 and FIG. 2, the battery pack 100 provided for the utility model includes a battery box 10, a battery module 20 and a plurality of fixing plates 30 for fixing the battery module 20 in the battery box 10, The battery box 10 is provided with a plurality of mounting screw holes 11 .

Please refer to FIG. 3 to FIG. 10 , the battery module 20 includes a plurality of battery modules 21 and a plurality of flexible connection busbars 22 electrically connecting the plurality of battery modules 21, and each battery module 21 includes two A fixed bracket 23 , a plurality of single cells 24 , two bus plates 25 and two insulating protection plates 26 . The two fixing brackets 23 are arranged in parallel and spaced apart from each other. Each fixing bracket 23 includes an upper surface 231 and a lower surface 232 opposite to each other. The upper surface 231 is provided with a plurality of installation holes 2311 . The plurality of mounting holes 2311 are arranged in a straight line, and each mounting hole 2311 is circular in size and corresponds to a single battery 24, and each mounting hole 2311 is used to insert one end of a corresponding single battery 24 to fix the housing The single battery 24 described above. At least one screw hole 2321 is formed on the lower surface 232 , and the lower surface 232 protrudes away from the upper surface 231 to form at least one positioning column 2322 . In this embodiment, two connecting screw holes 2321 are opened on the lower surface 232 , and the lower surface 232 protrudes away from the upper surface 231 to form two positioning columns 2322 .

Please refer to FIG. 8 and FIG. 9 , each fixing bracket 23 also includes opposite first side walls 233 and second side walls 234 , and a surface of the first side wall 233 away from the second side wall 234 is provided with Two locking blocks 235 are arranged at intervals, and each locking block 235 is T-shaped. A surface of the second side wall 234 away from the first side wall 233 is provided with two locking slots 236 corresponding to the two locking blocks 235 one-to-one, and two adjacent battery modules 21 pass through the The two locking blocks 235 and the two locking slots 236 are locked, connected and fixed.

One surface of the first side wall 233 close to the second side wall 234 and one surface of the second side wall 234 close to the first side wall 233 are each provided with a limiting block 237, the limiting The block 237 is in the shape of a cuboid and is used for limiting the insulating protection plate 26 . The first side wall 233 and the second side wall 234 are further provided with two buckles 238 on the edge of the end away from the upper surface 231, and the two buckles 238 are used to clamp and fix the insulation. Protective plate 26.

Two ends of each fixing bracket 23 are respectively provided with a fixing hole 239 .

Please refer to FIG. 7 , the plurality of single cells 24 are located between the two fixing brackets 23 , and each single cell 24 includes a positive terminal 241 and a negative terminal 242 .

Please refer to FIG. 11 , the two manifolds 25 are respectively fixedly connected to the lower surfaces 232 of the two fixing brackets 23, and each manifold 25 includes a manifold 251 and a manifold 252, and the manifold 251 is rectangular. And at least one first through hole 2511 and at least one second through hole 2512 are opened. The at least one first through hole 2511 is in one-to-one correspondence with the at least one connecting screw hole 2321 , and the at least one second through hole 2512 is in one-to-one correspondence with the at least one positioning post 2322 . A fixing nut 2513 is fixedly connected to both ends of a surface of the bus substrate 251, and the bus piece 252 is rectangular and fixedly connected to a surface of the bus substrate 251 on which the fixing nut 2513 is fixedly connected. superior. The bus plate 252 is provided with a plurality of elastic pieces 2521 corresponding to the plurality of installation holes 2311 one by one, and the plurality of elastic pieces 2521 tilt away from the bus substrate 251 . In this embodiment, the busbar 251 is made of copper, and the busbar 252 is made of nickel; the fixing nut 2513 is fixedly connected to the busbar 251 through a riveting process, and the busbar 251 It is laser welded together with the bus bar 252 .

The two insulating protection plates 26 are respectively fixedly connected to the two fixing brackets 23, and each insulating protecting plate 26 is located on the side of the corresponding bus plate 25 away from the lower surface 232 of the corresponding fixing bracket 23, each The insulating protection plate 26 has a rectangular shape and is made of insulating material.

Each flexible connection busbar 22 is rectangular and has a through hole 221 at each end. The flexible connection busbar 22 is made of metal material and is used for communication between two bus plates 25 of two adjacent battery modules 21. electrical connection.

Each fixing plate 30 is T-shaped and one surface protrudes toward the direction away from the fixing plate 30 to form two limiting columns 31, the two limiting columns 31 are arranged at intervals, and the fixing plate 30 is also provided with There is a connection hole 32 .

When assembling, the two manifolds 25 are respectively placed on the lower surfaces 232 of the two fixing brackets 23, and each manifold 25 has a surface of the manifold 252 and a lower surface of a corresponding fixing bracket 23. Surfaces 232 are in contact. The positioning column 2322 on each fixing bracket 23 is inserted into a corresponding second through hole 2512 of a corresponding manifold 25 to position the manifold 25, and at the same time, each elastic piece 2521 is inserted into a corresponding mounting hole 2311 , and then use at least one screw to sequentially pass through a corresponding first through hole 2511 and a corresponding connecting screw hole 2321 to lock and fix the manifold 25 on the lower surface 232 of the fixing bracket 23 . Then insert the two ends of each single battery 24 into the corresponding mounting holes 2311 of the two fixing brackets 23, and the two ends of each single battery 24 are respectively connected to the corresponding holes of the two manifolds 25. A spring piece 2521 is electrically connected with each other. Specifically, each unit battery 24 is inserted into the two fixing brackets 23 in the same direction, that is, the positive ends 241 of the plurality of unit batteries 24 are all inserted into one fixing bracket 23, and the plurality of unit batteries 24 are inserted into one fixing bracket 23. The negative terminal 242 of the bulk battery 24 is inserted into another fixing bracket 23 . The positive terminals 241 of the multiple single batteries 24 are electrically connected through a busbar 25 , and the negative terminals 242 of the multiple single batteries 24 are electrically connected through another busbar 25 .

Each block 235 of the two fixing brackets 23 of one battery module 21 is inserted into a corresponding slot 236 of the two fixing brackets 23 of the other battery module 21 to realize the connection between two adjacent battery modules 21 After the two adjacent battery modules 21 are fixedly connected, two flexible connection busbars 22 are used for further electrical connection, that is, the two ends of the adjacent two battery modules 21 are each connected by a flexible connection busbar 22 electrical connection. Specifically, one end of the flexible connection busbar 22 is locked and fixed to the said flexible connection busbar 22 through a through hole 221 of a flexible connection busbar 22 and a fixing nut 2513 of a busbar 25 of a battery module 21 in sequence. On a manifold 25 of the battery module 21, use another screw to pass through another through hole 221 of the flexible connection busbar 22 and a fixing nut 2513 of a manifold 25 of the other battery module 21 to insert the The other end of the flexible connection bus bar 22 is locked and fixed on a bus plate 25 of another battery module 21 , so as to realize the electrical connection between two adjacent battery modules 21 . The directions of the plurality of single cells 24 of two adjacent battery modules 21 can be the same or opposite. When the directions are the same, the two adjacent battery modules 21 are connected in parallel; when the directions are opposite, the two adjacent battery modules 21 for series connection. That is, when the positive ends 241 of the plurality of single cells 24 of one battery module 21 are electrically connected to the positive ends 241 of the plurality of single cells 24 of another battery module 21 through the flexible connection busbar 22, they are connected in parallel. The positive terminals 241 of the multiple cells 24 of one battery module 21 and the negative terminals 242 of the multiple cells 24 of the other battery module 21 are electrically connected in series through the flexible connection busbar 22 .

Then insert each insulation protection plate 26 into the two buckles 238 and two limit blocks 237 corresponding to a fixed bracket 23 of each battery module 21, and fasten and fix it. Specifically, each insulation protection plate 26 is located on the corresponding One busbar 25 is away from the side of the lower surface 232 corresponding to one fixing bracket 23 , and each insulating protection plate 26 provides insulation protection for a corresponding busbar 25 .

The two limiting columns 31 of each fixing plate 30 are respectively inserted into the fixing holes 239 of the two fixing brackets 23 at one end of two adjacent battery modules 21, and then the screws pass through the connecting holes of the fixing plate 30 in turn. 32. Lock and fix the corresponding one of the mounting screw holes 11 of the battery box 10 , so that the battery module 20 is fixed in the battery box 10 .

The fixed bracket provided in the battery pack provided by the utility model can be combined freely, thereby adapting to different needs, without remaking a unique fixed bracket, which saves time such as procurement cycle and production cycle, and is easy to disassemble, which is beneficial to after-sales and maintenance. The battery module of the battery pack provided by the utility model is a cuboid and takes up little space.

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 (9)

1. A kind of 1. battery pack, it is characterised in that：Including battery case, battery modules and it is multiple the battery modules are fixed on it is described Fixed plate in battery case, the battery modules include multiple battery modules and multiple busbars that are flexible coupling；

   Each battery module includes two fixing brackets, multiple single batteries, two cylinder manifolds and two insulating protecting plates, each Fixing bracket includes opposite upper and lower surface, and the both ends of each single battery are inserted respectively into described two fixing brackets Upper surface；Each fixing bracket includes opposite the first side wall and second sidewall, and the first side wall is away from second side One surface of wall is equipped with two fixture blocks, and a surface of the second sidewall away from the first side wall is equipped with two card slots, Two adjacent battery modules are connected together fixation by described two fixture blocks and described two card slots；Described two cylinder manifolds point It is not fixedly connected on described two support bracket fastened lower surfaces；

   Described two insulating protecting plates are respectively fixedly connected with described two fixing brackets, and each insulating protecting plate positioned at pair Answer side of the cylinder manifold away from a corresponding support bracket fastened lower surface；

   Two cylinder manifolds of the both ends of each busbar that is flexible coupling respectively with two adjacent battery modules are mutually electrically connected.
2. 2. battery pack according to claim 1, it is characterised in that：Multiple mounting holes are offered on the upper surface, it is described Multiple mounting holes are arranged in yi word pattern, and each mounting hole is rounded and size corresponds to a single battery, each single battery Both ends be inserted respectively into described two one mounting hole of support bracket fastened correspondence.
3. 3. battery pack according to claim 2, it is characterised in that：Each single battery includes positive terminal and negative pole end, often The positive terminal of multiple single batteries of a battery module is inserted into support bracket fastened one mounting hole of correspondence, negative pole end It is inserted into another support bracket fastened one mounting hole of correspondence.
4. 4. battery pack according to claim 3, it is characterised in that：At least one connection spiral shell is offered on the lower surface Hole, also extends to form at least one positioning column on the lower surface to the direction protrusion away from the upper surface；Each cylinder manifold Including the substrate that converges, the confluence substrate is rectangular and offers at least one first through hole and at least one second through hole；Often Each positioning column on a fixing bracket is inserted on a corresponding confluence substrate in corresponding second through hole, then with screw according to It is secondary that each cylinder manifold is locked in a corresponding fixing bracket through a corresponding first through hole, a corresponding connecting screw hole Lower surface on.
5. 5. battery pack according to claim 4, it is characterised in that：The cylinder manifold further includes confluence piece, the confluence piece It is rectangular and be fixedly connected on it is described confluence substrate a surface on；The confluence on piece is equipped with multiple and the multiple mounting hole One-to-one shrapnel, the multiple shrapnel are tilted to the direction away from the confluence substrate, and each shrapnel is inserted into corresponding one Further mutually it is electrically connected with a corresponding single battery in a mounting hole.
6. 6. battery pack according to claim 5, it is characterised in that：The confluence substrate is equipped with a surface of the confluence piece Both ends on be also respectively fixedly connected with a fixing nut, the busbar that is each flexible coupling is made of metal material and both ends respectively offer One perforation；One of perforation of the busbar that is flexible coupling, a remittance of battery module are sequentially passed through with a screw One fixing nut of flowing plate is locked, then with another screw sequentially pass through the busbar that is flexible coupling another perforation, One fixing nut of one cylinder manifold of another battery module is locked two remittances of two adjacent battery modules Flowing plate is mutually electrically connected.
7. 7. battery pack according to claim 1, it is characterised in that：A table of the first side wall close to the second sidewall Face and the second sidewall are respectively provided with a limited block on a surface of the first side wall, and the limited block is in rectangular Body, the first side wall and the second sidewall are also respectively provided with two buckles on the end margin away from the upper surface, each Insulating protecting plate is inserted between corresponding support bracket fastened two limited block and two buckles and is clamped fixation.
8. 8. battery pack according to claim 1, it is characterised in that：Each support bracket fastened both ends also respectively offer one admittedly Determine hole；Each fixed plate is T-shaped and a table extends to form two limited posts away from the direction protrusion of the fixed plate, described Two limited posts are arranged at intervals and are inserted respectively into two support bracket fastened mounting holes of two adjacent battery modules fixed.
9. 9. battery pack according to claim 8, it is characterised in that：Multiple installation screws are offered on the battery case, often A connecting hole is offered in a fixed plate, then one connecting hole of correspondence, corresponding installation screw general are sequentially passed through with screw The battery modules are locked in the battery case.