CN209896120U

CN209896120U - Battery module

Info

Publication number: CN209896120U
Application number: CN201920247262.6U
Authority: CN
Inventors: 沈红东; 敬文毅
Original assignee: Nanjing Lishida Welding Technology Co Ltd
Current assignee: Nanjing Lishida Welding Technology Co Ltd
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2020-01-03
Anticipated expiration: 2029-02-27

Abstract

A battery module comprises a box body; the box body is provided with an upper cover and a side plate; the battery cores are distributed in the box body; the battery cell is provided with a lug and is provided with a plurality of groups; each electric core is a single high-capacity electric core; the heteropolar lugs of adjacent cells are sequentially connected in series through a plurality of silica gel wires; a nickel sheet is arranged on the positive electrode lug and the negative electrode lug of each battery cell; and the multiple strands of silica gel wires are connected to the nickel sheets of the tabs. The utility model discloses require greatly reduced to voltage and internal resistance uniformity, effectively prevented in transportation and use because of vibrations or deformation lead to the phenomenon that utmost point ear nickel piece drops, prolonged the life of battery module.

Description

Battery module

Technical Field

The utility model relates to a battery module belongs to battery technical field.

Background

The positive negative pole of a plurality of electric cores needs to be connected in series for obtaining required voltage output of the existing battery module, and because the lug material is the aluminum product when the electric core leaves the factory, a high-power laser welding machine is needed to be adopted for welding and connecting the aluminum sheet, and because manual tin soldering can not be carried out, the flexible connection between the lugs of the electric core can not be completed. Because the lithium electric welding machine adopting the high-capacity battery core needs large-current discharge and has special requirements on the volume, the structure and the protection of the battery module, the existing technology has no available scheme.

Therefore, further improvements are desired.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the battery module is firm in structure, long in service life and convenient to transport.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows: a battery module comprises a box body; the box body is provided with an upper cover and a side plate; the battery cores are distributed in the box body; the battery cell is provided with a positive electrode lug and a negative electrode lug, and the battery cell is provided with a plurality of groups; each electric core is a single high-capacity electric core; the heteropolar lugs of the battery cell are sequentially connected in series through a plurality of silica gel wires; a nickel sheet is arranged on the positive electrode lug and the negative electrode lug of each battery cell; and the multiple strands of silica gel wires are connected to the nickel sheets of the tabs.

Preferably, the multi-strand silica gel line is connected between the nickel sheets of the adjacent battery cell tabs in a U shape; the multi-strand silica gel wire is connected on the nickel sheet through soldering tin.

Preferably, the nickel sheet is welded on the anode tab and the cathode tab by laser.

Preferably, the tops of the plurality of battery cores are provided with insulating pressing strips; and a groove for placing an insulating pressing strip is formed in the top of each battery cell.

Preferably, the length of the insulating pressing strip is matched with the thickness formed by the plurality of battery cells side by side; the insulating pressing strips comprise at least two insulating pressing strips.

Preferably, a battery BMS protection plate is disposed above the insulating compression bar.

Preferably, the battery BMS protection plate is erected on the insulation pressing bar through an L-shaped bent pin.

Preferably, the upper cover and the side plates are made of sheet metal parts.

The utility model discloses a single large capacity electricity core compares two and the parallelly connected words of electricity core more than two, and its advantage lies in: 1. the requirements on the consistency of the voltage and the internal resistance of the parallel-connected battery cells are greatly reduced. 2. In order to obtain required voltage output, the anode and the cathode of the battery core are required to be connected in series, and after the battery core lug is subjected to nickel conversion, the anode and the cathode of the battery core are connected by adopting a plurality of strands of silica gel wires and U-shaped tin solders, so that the stress of the battery core lug is greatly reduced, the phenomenon that a lug nickel sheet falls off due to vibration or deformation in the transportation and use processes is effectively prevented, and the service life of the battery module is prolonged. 3. The utility model discloses a fixed electric core of high strength insulating depression bar has prevented the aversion of electric core in transportation and use effectively. Use the special appearance structure of panel beating, this structural optimization has protected electric core and module inside.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of the exploded structure of the present invention.

Fig. 2 is a schematic view of a connection structure between cells.

Fig. 3 is a schematic structural diagram of a battery cell.

Fig. 4 is a schematic view of the assembly structure of the present invention.

Fig. 5 is a front sectional view of the present invention.

Fig. 6 is a side view of the present invention.

Fig. 7 is a sectional view in the top view direction of the present invention.

In the figure, 1 is the box body, 2 is the upper cover, 3 is the curb plate, 4 is electric core, 4.1 is utmost point ear, 5 is stranded silica gel line, 6 is the nickel piece, 7 is insulating layering, 8 is the battery BMS protection shield, 9 is L type curved foot spare.

Detailed Description

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 a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the following description, for purposes of clarity, not all features of an actual implementation are described, well-known functions or constructions are not described in detail since they would obscure the invention with unnecessary detail, it being understood that in the development of any actual embodiment, numerous implementation details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, changing from one implementation to another, and it being recognized that such development efforts may be complex and time consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.

Referring to fig. 1 to 7, a battery module includes a case 1; the box body 1 is provided with an upper cover 2 and a side plate 3; the battery cell 4 is distributed in the box body 1; the battery cell 4 is provided with a tab 4.1, and the battery cell is provided with a plurality of groups; each electric core is a single high-capacity electric core; the heteropolar lugs of adjacent cells are sequentially connected in series through a plurality of silica gel wires 5; a nickel sheet is arranged on the positive and negative electrode tabs of each battery cell 4; the multi-strand silica gel wire 5 is connected to the nickel sheet 6 of the tab.

In the present embodiment, there are 12 cells in total, which are cell a-cell m, as shown in fig. 2.

Further, in this embodiment, the multiple strands of silicone wires 5 are connected between the nickel sheets of the adjacent cell tabs in a U shape; the multi-strand silica gel wire is connected on the nickel sheet through soldering tin.

Further, in the present embodiment, the nickel sheet 6 is welded to the tab 4.1 by laser.

Specific saying so, this module is with electric core utmost point ear laser welding nickel piece after, adopts the positive negative pole of stranded silica gel line U-shaped soldering tin connection electric core, greatly reduced electric core utmost point ear's stress, effectively prevented in transportation and use because of vibrations or the phenomenon that deformation leads to utmost point ear nickel piece to drop, prolonged the life of battery module.

Further, in this embodiment, insulating pressing strips 7 are disposed on the tops of the plurality of battery cells; and a groove for placing an insulating pressing strip is formed in the top of each battery cell.

Further, in this embodiment, the length of the insulating pressing strip 7 matches the thickness formed by a plurality of battery cells side by side; the insulating pressing 7 strips comprise at least two.

Further, in the present embodiment, a battery BMS protection plate 8 is disposed above the insulating compression bar 7.

Further, in the present embodiment, the battery BMS protecting plate 8 is mounted on the insulating compression bar by the L-shaped bent leg member 9.

Specifically speaking, this module has still adopted the fixed electric core of high strength insulating depression bar, has prevented the aversion of electric core in transportation and use effectively. The insulating pressing strips are positioned near the battery tabs, so that the shielding of the battery cell safety explosion-proof window is avoided, meanwhile, the battery BMS protection board is arranged above the two insulating pressing strips and is kept isolated from the battery cell in space, the heat dissipation of the protection board and the battery cell is facilitated,

further, in this embodiment, the upper cover and the side plates are made of sheet metal parts.

In this embodiment, the battery module employs 13 large-capacity battery cells, and the positive electrode and the negative electrode of the battery cells are connected in series to obtain the required voltage output. Because this module adopts single large capacity electric core, compares 2 and above 2 electric cores and connects in parallel, to the voltage of parallelly connected electric core and the internal resistance uniformity requirement greatly reduced. As shown in the drawings of the specification, 7 cells are placed on the left side, 6 cells are placed on the right side, and the positive electrode and the negative electrode of each cell are connected in series. As shown in fig. 2, the negative electrode of the battery cell a is connected to the positive electrode of the battery cell b, the negative electrode of the battery cell b is connected to the positive electrode of the battery cell c, and the negative electrode of the battery cell c is connected to the positive electrode of the battery cell d, so that the battery cell e, the battery cell f, the battery cell g, the battery cell h, the battery cell i, the battery cell j, the battery cell k, the battery cell l, and the battery cell m are connected in this way, the positive electrode of the battery cell 1 is used as the positive electrode of the module, and the negative electrode of the battery cell.

In the drawings of the present embodiment, the installation manner of 13 battery cells is taken as a standard, but in other embodiments, a battery module installation manner of more than or less than 13 battery cells may also be adopted. The electric core is connected by a plurality of strands of silica gel wires in a U-shaped soldering tin manner, and in other embodiments, other forms of flexible wires (braided belt wires, a plurality of strands of wires, a plurality of layers of wires and the like) can be connected.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A battery module includes a case (1); the box body (1) is provided with an upper cover (2) and a side plate (3); the battery cores (4) are distributed in the box body (1); electric core (4) be equipped with utmost point ear (4.1), its characterized in that: the battery cell is provided with a plurality of groups; each electric core is a single high-capacity electric core; the heteropolar lugs of adjacent cells are sequentially connected in series through a plurality of silica gel wires (5); a nickel sheet is arranged on the positive electrode lug and the negative electrode lug of each battery cell (4); the multi-strand silica gel wire (5) is connected to the nickel sheet (6) of the pole lug.

2. The battery module according to claim 1, wherein: the multi-strand silica gel wire (5) is connected between the nickel sheets of the adjacent battery cell pole lugs in a U shape; the multi-strand silica gel wire is connected on the nickel sheet through soldering tin.

3. The battery module according to claim 2, wherein: the nickel sheet (6) is welded on the pole lug (4.1) through laser.

4. The battery module according to claim 1, wherein: insulating pressing strips (7) are arranged at the tops of the plurality of battery cores; and a groove for placing an insulating pressing strip is formed in the top of each battery cell.

5. The battery module according to claim 4, wherein: the length of the insulating pressing strip (7) is matched with the thickness formed by the plurality of battery cells in parallel; the insulating pressing strips (7) comprise at least two.

6. The battery module according to claim 5, wherein: and a battery BMS protection plate (8) is arranged above the insulating pressing strip (7).

7. The battery module according to claim 6, wherein: the battery BMS protection plate (8) is erected on the insulation pressing strip through an L-shaped bent pin piece (9).

8. The battery module according to claim 1, wherein: the upper cover and the side plates are made of sheet metal parts.