CN210040369U - Battery pack - Google Patents

Abstract

The utility model provides a battery pack, which comprises a battery box and a battery module contained in the battery box; the battery module comprises a plurality of battery modules arranged side by side, and the adjacent battery modules are electrically connected through a connecting plate; each battery module comprises a pair of fixing plates arranged at intervals and a plurality of layers of single batteries arranged between the fixing plates; a plurality of circuit boards are arranged between every two adjacent layers of single batteries side by side and are fixed and electrically connected through connecting sheets; each layer of single batteries of every two layers of adjacent single batteries are connected in parallel through a plurality of circuit boards and connecting pieces, and every two layers of adjacent single batteries are connected in series through a plurality of circuit boards and connecting pieces. The utility model provides a convenient dismantlement of battery package and maintenance.

Description

Battery pack

[ technical field ] A method for producing a semiconductor device

The utility model relates to a power battery technical field especially relates to a battery package

[ background of the invention ]

Electric vehicles are typically powered by a battery pack. The battery pack generally includes a battery box and a battery module installed in the battery box. In order to increase the output voltage of the battery pack to meet the power requirement of the electric vehicle, the battery module generally includes a plurality of single batteries, that is, the plurality of single batteries are combined in series and parallel to form the battery module. However, in the conventional battery module, since all the single batteries located on the same layer share one circuit board, if one single battery or one circuit board fails, the whole circuit board needs to be disassembled, and the disassembly and the maintenance are inconvenient.

In view of the above, it is desirable to provide a new battery pack to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a battery package of convenient dismantlement, maintenance.

In order to achieve the above object, the present invention provides a battery pack, which includes a battery box and a battery module accommodated in the battery box; the battery module comprises a plurality of battery modules arranged side by side, and the adjacent battery modules are electrically connected through a connecting plate; each battery module comprises a pair of fixing plates arranged at intervals and a plurality of layers of single batteries arranged between the fixing plates; a plurality of circuit boards are arranged between every two adjacent layers of single batteries side by side and are fixed and electrically connected through connecting sheets; each layer of single batteries of every two layers of adjacent single batteries are connected in parallel through a plurality of circuit boards and connecting pieces, and every two layers of adjacent single batteries are connected in series through a plurality of circuit boards and connecting pieces.

In a preferred embodiment, one of the fixing plates of each battery module is connected to one of the fixing plates of an adjacent battery module by the connecting plate.

In a preferred embodiment, the connection plate is a nickel-plated copper plate.

In a preferred embodiment, the battery box comprises a box body and a box cover for covering the box body; each fixing plate is provided with an installation part, and each installation part is provided with a plurality of installation holes; and the bottom of the box body is provided with a fastening hole corresponding to the mounting hole.

In a preferred embodiment, the mounting portion is formed to extend from an edge of each of the fixing plates in a direction perpendicular to the fixing plates, and is integrally formed with the fixing plates.

In a preferred embodiment, a protective plate is further provided within the housing adjacent one of its side walls.

In a preferred embodiment, a flow restriction plate is further arranged in the box body.

In a preferred embodiment, the unit cell is a cylindrical lithium ion battery.

The utility model provides a battery pack because be provided with a plurality of circuit boards between every two-layer battery cell side by side, when wherein certain battery cell trouble, only need dismantle with its circuit board that corresponds can, need not to dismantle with other circuit boards of one deck, and then convenient the maintenance. In addition, when one of the circuit boards breaks down, only the circuit board needs to be replaced, and therefore cost is saved.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of the battery pack provided by the present invention.

Fig. 2 is an exploded perspective view of the battery module of fig. 1.

Fig. 3 is a schematic view of the battery module of fig. 1 mounted in a case at another angle.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a battery pack 100 includes a battery box 10 and a battery module 20 accommodated in the battery box 10. The battery module 20 includes a plurality of battery modules 21 arranged side by side, and the adjacent battery modules 21 are electrically connected to each other by a connection plate 22. Each battery module 21 includes a pair of fixing plates 211 disposed at intervals and a plurality of unit cells 212 disposed between the pair of fixing plates 211. Further, a plurality of circuit boards 213 are arranged between every two adjacent layers of the unit batteries 212 side by side, and the plurality of circuit boards 213 are fixed and electrically connected by a connecting sheet 214; each layer of the single batteries 212 of each two adjacent layers of the single batteries 212 are connected in parallel through a plurality of circuit boards 213 and connecting sheets 214, and each two adjacent layers of the single batteries 212 are connected in series through a plurality of circuit boards 213 and connecting sheets 214. It is understood that the number and shape of the circuit boards 213 between each two layers of the single batteries 212 can be set according to specific design requirements. In the present embodiment, the number of the circuit boards 213 between each two layers of the unit batteries 212 is 3, and each circuit board 213 corresponds to a fixed number of the unit batteries 212.

The utility model provides a battery pack 100 because be provided with a plurality of circuit boards 213 between every two-layer battery cell 212 side by side, when wherein certain battery cell 212 trouble, only need dismantle rather than the circuit board 213 that corresponds can, need not to dismantle other circuit boards 213 of the same one deck, and then convenient maintenance. In addition, when one of the circuit boards 213 fails, only the circuit board needs to be replaced, thereby saving cost.

In one embodiment, one of the fixing plates 211 of each battery module 21 is connected to one of the fixing plates 211 of the adjacent battery module 21 by a connection plate 22.

In one embodiment, the connection plate 22 is a copper plate plated with nickel, which has good electrical conductivity.

In a preferred embodiment, the attachment tab 214 is a relatively low cost sheet of nickel.

In a preferred embodiment, the unit cells 212 are cylindrical lithium ion batteries having high energy density, light weight, and environmental protection.

Referring to fig. 3 again, the battery box 10 includes a box body 11 and a box cover 12 for covering the box body 11. In one embodiment, in order to facilitate the fixed connection of the battery module 20 and the battery box 10, a mounting portion 215 is disposed on each fixing plate 211, and a plurality of mounting holes 216 are opened on each mounting portion 215. Fastening holes (not shown) corresponding to the mounting holes 216 are formed at the bottom of the case 11, and a fastening member 23 (e.g., a screw) sequentially penetrates through the mounting holes 216 and the corresponding fastening holes, so that the battery module 20 can be fixed to the case 11.

In a preferred embodiment, the mounting portion 215 is formed to extend from the edge of the fixing plate 211 in a direction perpendicular to the fixing plate and is integrally formed with the fixing plate 211, so that the rigidity of the mounting portion 215 and the fixing plate 211 can be increased, and the tightness between the battery module 20 and the case 11 can be improved.

In one embodiment, a protection plate 24 is further provided inside the case 11 near one sidewall thereof to manage the battery modules 20 in order to protect the battery modules 20. Wherein, the protection plate 24 can be integrated with the collecting function, such as temperature collection and voltage collection. It is understood that the protection plate 24 may be electrically connected to the battery module 20 through a wire harness.

In addition, in one embodiment, a current limiting plate 25 is further disposed in the case 11 in order to protect the battery module 20 from overcharge of the battery module 20 during charging. It can be understood that when the battery module 20 is charged, the current passes through the current limiting plate 24 and then charges the battery module 20, and therefore, when the charging current is too large, the current limiting plate 24 can cut off the charging circuit, thereby protecting the battery module 20.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims (8)

1. A battery pack is characterized by comprising a battery box and a battery module contained in the battery box; the battery module comprises a plurality of battery modules arranged side by side, and the adjacent battery modules are electrically connected through a connecting plate; each battery module comprises a pair of fixing plates arranged at intervals and a plurality of layers of single batteries arranged between the fixing plates; a plurality of circuit boards are arranged between every two adjacent layers of single batteries side by side and are fixed and electrically connected through connecting sheets; each layer of single batteries of every two layers of adjacent single batteries are connected in parallel through a plurality of circuit boards and connecting pieces, and every two layers of adjacent single batteries are connected in series through a plurality of circuit boards and connecting pieces.

2. The battery pack according to claim 1, wherein: one of the fixing plates of each battery module is connected to one of the fixing plates of the adjacent battery module by the connecting plate.

3. The battery pack according to claim 1 or 2, wherein: the connecting plate is a nickel-plated copper plate.

4. The battery pack according to claim 2, wherein: the battery box comprises a box body and a box cover for closing the box body; each fixing plate is provided with an installation part, and each installation part is provided with a plurality of installation holes; and the bottom of the box body is provided with a fastening hole corresponding to the mounting hole.

5. The battery pack according to claim 4, wherein: the installation department is perpendicular to from the border of every fixed plate the direction extension of fixed plate forms, and with fixed plate integrated into one piece.

6. The battery pack according to claim 4, wherein: a protection plate is further arranged in the box body and close to one side wall of the box body.

7. The battery pack according to claim 4, wherein: and a flow limiting plate is also arranged in the box body.

8. The battery pack according to claim 1, wherein: the single battery is a cylindrical lithium ion battery.

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