CN214706087U

CN214706087U - Battery module

Info

Publication number: CN214706087U
Application number: CN202120437121.8U
Authority: CN
Inventors: 赵振超
Original assignee: Shenzhen Anshi New Energy Technology Co ltd
Current assignee: Shenzhen Anshi New Energy Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-11-12
Anticipated expiration: 2031-02-26

Abstract

The utility model provides a battery module, including group battery, battery support, busbar and collection board. The battery pack is formed by transversely arranging a plurality of battery monomers in rows in a stacked mode, the battery support is provided with a plurality of inserting holes corresponding to the battery monomers, the busbar comprises an L-shaped busbar, a Z-shaped busbar and a square busbar, the two acquisition plates are located on two sides of the battery pack, one acquisition plate is connected with the L-shaped busbar and the Z-shaped busbar through patches or pins are welded, and the other acquisition plate is connected with the square busbar through patches or pins are welded. The battery module in this embodiment, production efficiency is high, with low costs, and product space utilization is high, has abundanter application scenario simultaneously.

Description

Battery module

Technical Field

The utility model relates to a lithium ion battery's technical field, in particular to battery module.

Background

The lithium ion battery has the advantages of high energy density, large output power, long cycle life, wide working temperature range, environmental protection and the like, and can be widely applied to the fields of digital products, electric automobiles, energy storage and the like. With the rapid development of energy storage, communication, UPS, unmanned aerial vehicles, electric tools and electric vehicles in recent years, the market proportion of lithium ion batteries suitable for the field is increased year by year.

The most commonly used lithium ion batteries at present comprise square batteries, cylindrical batteries and soft package batteries, and the convergence and collection of battery modules are fixed in modes of laser welding, resistance welding, screw locking, soldering and the like; in particular, in cylindrical battery modules, manual soldering is generally used to fix the bus bars and the collecting wires, but the method has the following disadvantages: firstly, the tin soldering has potential safety hazards in operation, low efficiency and high cost; secondly, the wire harness is of a flexible structure, and the position and the shape of the structure are not easy to control, so that the space utilization rate is low; thirdly, the corresponding position of the wire harness needs manual identification, so that mistakes are easy to make, and the yield is low.

SUMMERY OF THE UTILITY MODEL

For solving prior art, production efficiency that the battery module exists is low, with high costs, and product space utilization is low, technical problem such as yields hang down, the technical scheme of the utility model as follows:

the utility model provides a battery module, including group battery, battery holder, busbar and collection board.

The battery pack is formed by transversely arranging a plurality of battery monomers in rows and in a stacked mode, and the battery pack is provided with a first electrode surface and a second electrode surface, wherein the first electrode surface and the second electrode surface are formed by two electrodes of the battery monomers.

The battery support is provided with a plurality of inserting holes corresponding to the battery monomers, and the two battery supports are fixed on the first electrode surface and the second electrode surface through the inserting holes.

The bus bars comprise L-shaped bus bars, Z-shaped bus bars and square bus bars; the Z-shaped busbars are distributed in the arrangement direction of the battery cells, two L-shaped busbars are distributed at two ends of the Z-shaped busbars, and the L-shaped busbars and the Z-shaped busbars are connected to the first electrode surface through resistance welding or laser welding; the plurality of square bus bars are distributed in the arrangement direction of the battery cells, and the square bus bars are connected to the second electrode surface by resistance welding or laser welding.

The two acquisition plates are positioned on two sides of the battery pack, one acquisition plate is connected with the L-shaped bus bar and the Z-shaped bus bar through patches or is welded through pins, and the other acquisition plate is connected with the square bus bar through patches or is welded through pins.

The utility model provides a battery module at first, connects or participates in the welding through resistance welding, laser welding, paster between battery electrode, busbar and the acquisition board three and carries out electric connection, avoids adopting manual soldering tin mode, can reduce the operation potential safety hazard, improves production efficiency simultaneously. Then, the collection plate with the fixed structure replaces a flexible and changeable wiring harness, so that the structural shape of the battery module is convenient to control, the wiring harness is prevented from being disorderly extended to the outside, and the structural space is saved. Secondly, the production efficiency can be improved through automatic and large-scale production, the product quality can be controlled, errors caused by manual detection are reduced, and the yield is improved. Finally, the bus bars in various shapes can enrich the design modes of series and parallel circuits of the battery pack and expand the application scenes of the battery module.

In a possible design, the battery bracket is provided with a first elastic buckling part, and the L-shaped bus bar, the Z-shaped bus bar, the square bus bar and the collecting plate are correspondingly provided with buckling grooves.

In a possible design, the battery holder is further provided with a second elastic buckling part, and the second elastic buckling part is clamped at the edges of the L-shaped bus bar, the Z-shaped bus bar, the square bus bar and the collecting plate.

In a possible design, the first elastic buckling part and the second elastic buckling part are uniformly distributed around the insertion hole.

In one possible design, the battery pack consists of two rows of the battery cells.

In one possible design, the L-shaped bus bar is provided with two fastening grooves and three connection points corresponding to the single batteries; the Z-shaped bus bar is provided with three buckling grooves and six staggered connection points corresponding to the single batteries; the square busbar is provided with four buckling grooves and six symmetrically arranged connection points corresponding to the battery monomers.

In one possible design, the material of the battery bracket is one of nylon, polycarbonate and acrylonitrile-butadiene-styrene plastic.

In one possible embodiment, the acquisition board is a printed circuit board or a flexible circuit board.

In one possible design, the L-shaped bus bar, the Z-shaped bus bar, and the square bus bar are made of one of brass, red copper, nickel-plated steel, and aluminum alloy.

In one possible design, the battery cell is a cylindrical battery cell.

Drawings

Fig. 1 is a schematic view of a battery module according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic diagram of an L-shaped bus bar and a Z-shaped bus bar according to an embodiment of the present invention;

fig. 4 is a schematic view of a square busbar according to an embodiment of the present invention.

Reference numerals: 10. a battery pack; 11. a first electrode face; 12. a second electrode face; 13. a battery cell; 20. a battery holder; 21. a first snap portion; 22. a second snap portion; 23. inserting holes; 31. an L-shaped bus bar; 32. a Z-shaped bus bar; 33. a square busbar; 34. a connection point; 40. collecting a plate; 41. and (4) buckling the groove.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "side", "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on installation, and are merely for convenience of description and simplicity of description, and do not 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 therefore should not be construed as limiting the present invention.

It should be noted that, in the embodiments of the present invention, the same reference numerals are used to denote the same components or parts, and for the same components or parts in the embodiments of the present invention, only one of the components or parts may be used as an example to denote the reference numeral in the drawings, and it should be understood that the reference numerals are also applicable to other similar components or parts.

In the following, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature.

As shown in fig. 1-2, the battery module in this embodiment includes a battery pack 10, a battery holder 20, a bus bar, and a collecting plate 40. In brief, a plurality of battery monomers 13 are fixed by a battery bracket 20 to form a battery pack 10, and then the battery monomers 13 are connected in series and in parallel by a bus bar, a collecting plate 40 and other components, so that the electrical performance of the battery monomers 13 is further enlarged, and compared with the battery monomers 13, the battery has higher voltage and current, so that the application scene of the battery is more diversified. For example, when the battery module is used as a power source of an electric vehicle, the battery cells 13 cannot meet the requirements due to the requirements of high power and large capacity, and therefore the battery cells 13 need to be combined in series and parallel to form a battery module so as to meet the requirements of the power source of the electric vehicle.

Specifically, the battery pack 10 is formed by arranging a plurality of battery cells 13 in rows and layers, that is, the battery pack 10 is formed by stacking a plurality of battery cells 13 in a three-dimensional structure like a rectangular parallelepiped or a cube. In the present embodiment, two rows of N battery cells 13 form an entire battery pack 10. It is contemplated that the battery pack 10 can also be arranged in more than two rows.

The battery pack 10 has a first electrode surface 11 and a second electrode surface 12, and the first electrode surface 11 and the second electrode surface 12 are composed of two electrodes of the battery cell 13. It should be noted that the battery electrodes on the first electrode surface 11 and the second electrode surface 12 are not all positive electrodes or all negative electrodes, and each electrode surface has both a positive electrode and a negative electrode, so that the battery cells 13 conform to the circuit design in series and parallel connection.

The battery cell 13 is a lithium ion battery, which is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. In the process of charging and discharging, lithium ions are inserted and extracted back and forth between the two electrodes; during charging, lithium ions are extracted from the positive electrode and are inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. The battery pack 10 is composed of a plurality of lithium ion battery cells 13, and the plurality of battery cells 13 are connected in parallel to increase the capacity, and connected in series to increase the voltage, and combined together in the above manner.

The battery holder 20 is provided with a plurality of insertion holes 23 corresponding to the battery cells 13, and the two battery holders 20 are fixed on the first electrode surface 11 and the second electrode surface 12 through the insertion holes 23.

That is, each insertion hole 23 of the battery holder 20 is correspondingly sleeved on the peripheral wall of the end portion of the battery cell 13, so that the battery holder 20 is fixed on the first electrode surface 11 and the second electrode surface 12 of the battery pack 10, and the plurality of battery cells 13 are positioned and fastened, so that the mechanism of the battery pack 10 has stability.

The bus bars include an L-shaped bus bar 31, a Z-shaped bus bar 32, and a square bus bar 33. The plurality of Z-shaped bus bars 32 are distributed in the arrangement direction of the battery cells 13, two L-shaped bus bars 31 are distributed at both ends of the Z-shaped bus bars 32, and the L-shaped bus bars 31 and the Z-shaped bus bars 32 are connected to the first electrode surface 11 by resistance welding or laser welding. The plurality of square bus bars 33 are distributed in the arrangement direction of the battery cells 13, and the square bus bars 33 are connected to the second electrode surface 12 by resistance welding or laser welding.

The busbar has multiple structural shapes, and can connect all the battery cells 13 in series and parallel through reasonable layout. In the present embodiment, the bus bars have three shapes, i.e., an L-shaped bus bar 31, a Z-shaped bus bar 32, and a square bus bar 33. The plurality of battery cells 13 are arranged in a row in a horizontal direction, so that the structure of the finally formed battery pack 10 is similar to a rectangular parallelepiped, two poles of all the battery cells 13 are distributed on two opposite surfaces of the rectangular parallelepiped, on the first electrode surface 11 of the battery pack 10, a plurality of Z-shaped busbars 32 are arranged along the arrangement direction of the battery cells 13, two L-shaped busbars 31 are distributed at two ends of the plurality of Z-shaped busbars 32, that is, the plurality of Z-shaped busbars 32 and the two L-shaped busbars 31 completely cover the first electrode surface 11 in a jigsaw manner, and all the L-shaped busbars 31 and the Z-shaped busbars 32 are welded to the positive electrode or the negative electrode of the battery cells 13 at corresponding positions. Accordingly, on the second electrode surface 12 of the battery pack 10, the plurality of square bus bars 33 are arranged along the arrangement direction of the battery cells 13, that is, the plurality of square bus bars 33 entirely cover the second electrode surface 12 in a jigsaw manner, and all the square bus bars 33 are welded to the positive electrode or the negative electrode of the battery cells 13 at the corresponding positions.

Two collecting plates 40 are disposed on two sides of the battery pack 10, one collecting plate 40 is connected to the L-shaped bus bar 31 and the Z-shaped bus bar 32 by a patch or is soldered by pins, and the other collecting plate 40 is connected to the square bus bar 33 by a patch or is soldered by pins.

The collecting plate 40 is provided with collecting lines, and the L-shaped bus bar 31, the Z-shaped bus bar 32 and the square bus bar 33 are conducted with the collecting lines, so that the monomer voltage and temperature information of the battery pack 10 can be transmitted out, and the working condition of the battery pack 10 can be monitored.

The battery module in this embodiment, at first, through resistance welding, laser welding, paster connection or participate in the welding and carry out electric connection between battery electrode, busbar and the collection board 40 three, avoid adopting the manual soldering tin mode, can reduce the potential safety hazard of operation, improve production efficiency simultaneously. Then, collection board 40 through fixed knot structure has replaced flexible changeable pencil, makes battery module structural shape be convenient for control, has avoided the pencil to extend to the outside in disorder, and then has saved structural space. Secondly, the production efficiency can be improved through automatic and large-scale production, the product quality can be controlled, errors caused by manual detection are reduced, and the yield is improved. Finally, the bus bars in various shapes can enrich the design modes of the series and parallel circuits of the battery pack 10, and expand the application scenes of the battery module.

In addition to supporting a plurality of battery cells 13, the battery holder 20 provides a battery pack 10 composed of the battery cells 13 with high stability, and the battery holder 20 also serves as a mounting base for the bus bar and the collecting plate 40, thereby providing a supporting force for the bus bar and the collecting plate 40. Therefore, in an embodiment, the battery holder 20 is provided with the first elastic buckling portion 21, the L-shaped bus bar 31, the Z-shaped bus bar 32, the square bus bar 33 and the collecting plate 40 are correspondingly provided with the buckling grooves 41, the first elastic buckling portion 21 penetrates through the square bus bar 33 and the buckling grooves 41 of the collecting plate 40, and the square bus bar and the collecting plate 40 are further stacked on the battery holder 20, and similarly, the L-shaped bus bar 31 and the collecting plate 40, and the Z-shaped bus bar 32 and the collecting plate 40 are also stacked on the battery holder 20 through the actions of the first elastic buckling portion 21 and the buckling grooves 41.

In order to further improve the fixing effect of the battery holder 20 on the L-shaped bus bar 31, the Z-shaped bus bar 32, the square bus bar 33 and the collecting plate 40, and improve the shock resistance of the battery module, in an embodiment, the battery holder 20 is further provided with a second elastic buckling portion 22, and the second elastic buckling portion 22 is clamped at the edges of the L-shaped bus bar 31, the Z-shaped bus bar 32, the square bus bar 33 and the collecting plate 40. The second snap-fastener 22 clasps and fixes the L-shaped busbar 31, the Z-shaped busbar 32, the square busbar 33, and the collecting plate 40 by using a hoop.

In order to make the battery holder 20 compact and fully utilize the area of the base of the battery holder 20, in one embodiment, the first elastic buckling portion 21 and the second elastic buckling portion 22 are uniformly distributed around the insertion hole 23.

In one embodiment, the battery pack 10 is composed of two rows of single batteries 13, the L-shaped bus bar 31 is provided with two fastening grooves 41 and three connection points 34 corresponding to the single batteries 13; the Z-shaped bus bar 32 is provided with three fastening grooves 41 and six connection points 34 which are arranged in a staggered manner and correspond to the battery cells 13; the square busbar 33 is provided with four fastening grooves 41 and six symmetrically arranged connection points 34 corresponding to the battery cells 13, and each connection point 34 is correspondingly connected with one electrode.

In one embodiment, the battery holder 20 is made of one of nylon, polycarbonate, and abs plastic.

Nylon, also known as polyamide, is non-toxic, lightweight, excellent in mechanical strength, wear resistance and corrosion resistance, and thus is widely used in the industries of machinery, chemical engineering, instruments, automobiles and the like to replace metals such as copper to manufacture bearings, gears, pump blades and other parts.

Polycarbonate (abbreviated as PC) has high strength, high elastic coefficient, high impact strength, wide application temperature range, high transparency, free dyeing property, low molding shrinkage, good dimensional stability, good fatigue resistance, good weather resistance and good electrical properties.

Acrylonitrile-butadiene-Styrene (ABS) plastic has good comprehensive performance, high impact strength, chemical stability and electrical property. Has the grades of high impact resistance, high heat resistance, flame retardance, reinforcement, transparency and the like.

In one embodiment, acquisition board 40 is a printed circuit board or a flexible circuit board.

The Printed Circuit board (PCB for short) consists of an insulating base plate, connecting leads and a bonding pad for assembling and welding electronic elements, and has the dual functions of a conducting Circuit and the insulating base plate. It can replace complex wiring to realize the electric connection between each element in the circuit.

The Flexible Printed Circuit board (FPC for short) is arranged on a link which needs to be repeatedly bent and some small parts, such as a bent part of a flip cover of a flip phone, a part of a printer link printing head and various modules.

In one embodiment, the L-shaped bus bar 31, the Z-shaped bus bar 32 and the square bus bar 33 are made of one of brass, copper, nickel-plated steel and aluminum alloy.

In one possible design, the battery cell 13 is a cylindrical battery cell 13.

In one embodiment, a 3-to-6-string scheme is used, with a cylindrical cell 13 having a capacity of 2.5 Ah. The specific implementation steps are as follows:

1) fixing the battery monomer 13 on the battery bracket 20;

2) the square bus bar 33 is fixed on the acquisition board 40 by means of patch, pin welding and the like, and is communicated with the acquisition line on the acquisition board 40;

3) the L-shaped bus bar 31 and the Z-shaped bus bar 32 are fixed on the acquisition board 40 by means of surface mounting, pin welding and the like, and are communicated with the acquisition line on the acquisition board 40;

4) fixing a convergence collection integration plate consisting of the square busbar 33 and the collection plate 40 on the battery monomer 13 in a resistance welding mode, a laser welding mode and the like, and limiting through the battery bracket 20;

5) the collecting and collecting integrated plate composed of the L-shaped bus bar 31, the Z-shaped bus bar 32 and the collecting plate 40 is fixed on the battery monomer 13 through resistance welding, laser welding and other modes, and is limited through the battery bracket 20.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery module, comprising:

the battery pack (10) is formed by arranging a plurality of battery monomers (13) in rows transversely and in a stacked mode, the battery pack (10) is provided with a first electrode surface (11) and a second electrode surface (12), and the first electrode surface (11) and the second electrode surface (12) are formed by two electrodes of the battery monomers (13);

the battery support (20) is provided with a plurality of insertion holes (23) corresponding to the battery monomers (13), and the two battery supports (20) are fixed on the first electrode surface (11) and the second electrode surface (12) through the insertion holes (23);

a bus bar including an L-shaped bus bar (31), a Z-shaped bus bar (32), and a square-shaped bus bar (33); the Z-shaped bus bars (32) are distributed in the arrangement direction of the battery cells (13), two L-shaped bus bars (31) are distributed at two ends of the Z-shaped bus bars (32), and the L-shaped bus bars (31) and the Z-shaped bus bars (32) are connected to the first electrode surface (11) through resistance welding or laser welding; the square bus bars (33) are distributed in the arrangement direction of the battery cells (13), and the square bus bars (33) are connected to the second electrode surface (12) through resistance welding or laser welding;

the two acquisition plates (40) are positioned on two sides of the battery pack (10), one acquisition plate (40) is connected with the L-shaped bus bar (31) and the Z-shaped bus bar (32) through a patch or welded through pins, and the other acquisition plate (40) is connected with the square bus bar (33) through a patch or welded through pins.

2. The battery module as recited in claim 1, wherein the battery holder (20) is provided with a first snap-fit portion (21), and the L-shaped bus bar (31), the Z-shaped bus bar (32), the square bus bar (33) and the collecting plate (40) are correspondingly provided with snap-fit grooves (41).

3. The battery module according to claim 2, wherein the battery holder (20) is further provided with a second elastic buckling portion (22), and the second elastic buckling portion (22) is clamped at the edges of the L-shaped bus bar (31), the Z-shaped bus bar (32), the square-shaped bus bar (33) and the collecting plate (40).

4. The battery module according to claim 3, wherein the first snap-fit portion (21) and the second snap-fit portion (22) are uniformly distributed around the insertion hole (23).

5. The battery module according to claim 4, wherein the battery pack (10) consists of two rows of the battery cells (13).

6. The battery module according to claim 5, wherein the L-shaped bus bar (31) is provided with two buckling grooves (41) and three connection points (34) corresponding to the battery cells (13); the Z-shaped bus bar (32) is provided with three buckling grooves (41) and six staggered connection points (34) corresponding to the single batteries (13); the square bus bar (33) is provided with four buckling grooves (41) and six symmetrically arranged connection points (34) corresponding to the battery monomer (13).

7. The battery module according to claim 1, wherein the battery holder (20) is made of one of nylon, polycarbonate, and acrylonitrile butadiene styrene plastic.

8. The battery module according to claim 1, wherein the collecting plate (40) is a printed circuit board or a flexible circuit board.

9. The battery module according to claim 1, wherein the L-shaped bus bar (31), the Z-shaped bus bar (32), and the square-shaped bus bar (33) are made of one of brass, red copper, nickel-plated steel, and aluminum alloy.

10. The battery module according to claim 1, wherein the battery cells (13) are cylindrical battery cells (13).