Battery module

Abstract

The utility model discloses a battery module and belongs to the technical field of battery modules. The battery comprises battery cells, end plates, steel belts, elastic insulating frames, battery connecting pieces and an upper cover, the plurality of battery cells are arranged in sequence, the two end plates are respectively arranged on the side surfaces of the two battery cells at the end part, the elastic insulating frames are arranged between the adjacent battery cells, the two steel belts are respectively bound at the upper and lower parts of the two end plates, and the battery connecting pieces are arranged on the upper cover. Limiting steps for limiting the two steel belts to move towards the middle are arranged on the end plates, the battery connecting piece is connected to the upper ends of all the battery cells, and the upper cover is arranged above the battery connecting piece. According to the utility model, the convenience of dismounting and mounting the steel belt and the tightening degree when the battery module is bound can be effectively considered.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a battery module. Background Art

[0002] A battery module is generally formed by binding multiple battery cells and two end plates together using steel strips. In the prior art, a Chinese utility model patent with patent number ZL 202321444799.4 discloses a lithium-ion battery module, which fixes the position of the steel strip by setting a groove on the end plate to prevent the steel strip from sliding. However, using this method, if the steel strip is to be tightened in the groove, the steel strip needs to be disconnected when it is disassembled and assembled between the steel strip and the battery module; if the steel strip can be directly put on the battery module or directly removed from the battery module, the tension of the steel strip in the groove is not good. Therefore, it is difficult for the prior art to give both the convenience of disassembling and assembling the steel strip and the tightness when binding the battery module. Utility Model Content

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a battery module that can effectively take into account the convenience of disassembly and assembly of the steel belt and the tightness when binding the battery module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A battery module includes battery cells, end plates, steel strips, elastic insulating frames, battery connectors, and an upper cover. Several battery cells are arranged in sequence, two end plates are respectively provided on the side surfaces of the two battery cells at the end portions, an elastic insulating frame is provided between adjacent battery cells, two steel strips are respectively tied to the upper and lower portions of the two end plates, and the end plates are provided with limiting steps for restricting the movement of the two steel strips toward the middle. The battery connectors are connected to the upper ends of all battery cells, and the upper cover is provided above the battery connectors.

[0006] Preferably, the battery connecting piece includes a flexible circuit board, an aluminum busbar, and a nickel sheet. The aluminum busbar connects the positive and negative electrodes of adjacent battery cells, and the nickel sheet is arranged between the aluminum busbar and the flexible circuit board.

[0007] Preferably, the battery connecting piece includes a plurality of temperature sensors, each temperature sensor is attached to a battery cell, and the temperature sensors are communicatively connected to the flexible circuit board.

[0008] Preferably, a mica tape is provided above the aluminum row of the battery connecting piece.

[0009] Preferably, the outer side of the steel belt is covered with a heat shrink tubing.

[0010] Preferably, an insulating sheet is provided between the end plate and the adjacent battery cell.

[0011] Preferably, a positive terminal and a negative terminal are respectively provided at the upper ends of the two end plates, and the positive terminal and the negative terminal are electrically connected to the battery connecting piece.

[0012] Preferably, a terminal cover is provided above the positive terminal and the negative terminal.

[0013] Preferably, a snap-fit ​​structure is provided between the terminal upper cover and the positive and negative terminals.

[0014] Preferably, a lifting hole is provided on the end plate.

[0015] The advantages of the utility model are:

[0016] 1. The elasticity provided by the elastic insulating frame effectively takes into account the convenience of steel belt disassembly and assembly and the tightness when binding the battery module;

[0017] 2. The limiting step not only limits the sliding range of the steel belt, but also does not affect the direct disassembly and assembly of the steel belt from the battery module because it is a one-way limit for the steel belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the exploded structure of a battery module provided in an embodiment of this specification;

[0019] Figure 2 A schematic diagram of the structure of the end plate provided in the embodiment of this specification;

[0020] Figure 3 A schematic diagram of the structure of the positive and negative terminals provided in the embodiments of this specification;

[0021] Figure 4 A schematic diagram of the structure of the elastic insulating frame provided in the embodiments of this specification;

[0022] Figure 5 A schematic diagram of the structure of a battery connector provided in an embodiment of this specification;

[0023] In the picture:

[0024] 1-top cover; 2-mica tape; 3-battery connector; 31-flexible circuit board; 32-aluminum busbar; 33-nickel sheet; 34-positive output aluminum busbar; 35-negative output aluminum busbar; 4-steel strip; 61-terminal block; 611-plug connector; 612-threaded hole; 613-support plate; 62-terminal top cover; 621-baffle; 7-battery cell; 8-elastic insulation frame; 9-PC insulation sheet; 10-end plate. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, this embodiment provides a battery module, including battery cells 7, end plates 10, steel strips 4, elastic insulating frames 8, battery connecting pieces 3, and an upper cover 1. Several battery cells 7 are arranged in sequence, two end plates 10 are respectively provided on the two sides of the battery cells at the end, and an elastic insulating frame 8 is provided between adjacent battery cells 7. Two steel strips 4 are respectively tied to the upper and lower parts of the two end plates 10, the battery connecting piece 3 is connected to the upper ends of all battery cells, and the upper cover 1 is provided above the battery connecting piece 3. Among them, this embodiment specifically adopts 13 battery cells to form a battery module, and the 13 battery cells are connected in series through the battery connecting piece. Figure 2 As shown, the end plate 10 is provided with a limiting step 101 for limiting the movement of the two steel strips toward the middle, which not only makes the two steel strips 4 stably located at the upper and lower parts of the battery module to ensure the binding effect; and because the limiting step 101 only limits the steel strips in one direction, the two steel strips 4 can be respectively put on or removed from the upper and lower ends of the battery module, making disassembly and assembly more convenient. At the same time, due to the setting of the elastic insulating frame 8 between adjacent battery cells 7, the battery module has a certain elasticity in the length direction, and the process of directly putting on or removing the steel strips 4 from the upper and lower ends of the battery module is smoother, and the tightness of the steel strips 4 tied to the battery module is also guaranteed.

[0027] like Figure 2 As shown, in order to balance lightweight and structural strength, the end plate 10 is provided with multiple staggered reinforcing ribs 102. Reinforcement blocks 103 are only provided at the four corners of the end plate 10. The limiting steps 101 are provided on the side of the reinforcing blocks 103. Since the steel belt 4 is in a taut state, the shorter limiting steps 101 can ensure the limiting effect. At the same time, there are also lifting holes 104 in the reinforcing blocks 103 to facilitate the lifting and transportation of the battery module. The two end plates 10 are respectively provided with positive and negative terminals, which are used to connect the positive and negative output aluminum bars of the battery connector 3 and external power or charging equipment.

[0028] like Figure 3 As shown, both the positive and negative terminals include a terminal block 61 and a terminal cover 62. A plug connector 611 is provided at the lower end of the terminal block 61, and a plug slot is provided at the upper end of the end plate 10. The plug connector 611 and the plug slot are connected by a snap. Two threaded holes 612 are provided in the terminal block 61 for connecting the positive and negative output aluminum bars on the battery connector 3 and external devices. The terminal cover 62 is used to prevent the positive and negative output aluminum bars from contacting external objects and causing problems such as short circuits. Support plates 613 are provided above both sides of the terminal block 61. The support plates 613 are connected to the terminal cover 62 by a snap. The support plates 613 provide an installation space between the threaded holes 612 and the terminal cover 62. A baffle 621 is provided on the side of the terminal cover 62 close to the outside of the battery module to further prevent the positive and negative output aluminum bars from contacting external objects.

[0029] like Figure 4As shown, the elastic insulating frame 8 is in a U-shape and is made of 4.5mm thick silicone material. It not only provides reliable elasticity and insulation, but also saves materials with the hollow part in the middle, and leaves heat dissipation space between adjacent battery cells, ensuring the heat dissipation efficiency of the battery cells and improving safety.

[0030] like Figure 5 As shown, the battery connector 3 includes a flexible circuit board 31, aluminum bars 32, nickel sheets 33, and a temperature sensor. In this embodiment, six aluminum bars 32 are provided on both sides of the flexible circuit board 31. The aluminum bars on both sides of the flexible circuit board 31 are positioned in an alternating manner. Each aluminum bar is used to connect the positive and negative poles of adjacent battery cells. Therefore, this battery connector can connect 13 battery cells in series. Positive and negative output aluminum bars 34 and 35 are also provided at both ends of the flexible circuit board 31, respectively, for connecting to the positive and negative terminals on the end plate 10. A nickel sheet 33 is welded between each aluminum bar 32 and the flexible circuit board 31. The nickel sheet 33 is used to collect the voltage of each battery cell 7 to facilitate monitoring of the voltage status of each battery cell. There are 13 temperature sensors, each of which is attached to a battery cell. The temperature sensors are in communication with the flexible circuit board 31 to monitor the temperature status of each battery cell. Therefore, this battery module can obtain the voltage and temperature of each battery cell, and can transmit the voltage and temperature data to the battery management system and background system through the battery connector to monitor the voltage and temperature status of each battery cell, detect battery cell abnormalities in time, eliminate safety hazards, and ensure electricity safety.

[0031] like Figure 1 As shown, in order to avoid short circuit or leakage and ensure safety, a mica tape 2 is provided above the aluminum row of the battery connector 3, a heat shrink tubing is wrapped around the outside of the steel strip 4, and a 0.5mm thick PC insulating sheet 9 is provided between the end plate 10 and its adjacent battery cell.

[0032] In addition, positive and negative pole markings are engraved on the upper cover 1 for quickly and accurately distinguishing the positive and negative poles during use of the battery module.

[0033] The above is only a preferred embodiment of the present invention, which is one implementation method based on the overall concept of the present invention. The scope of protection of the present invention is not limited to this embodiment. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A battery module, characterized in that: It includes battery cells, end plates, steel strips, elastic insulating frames, battery connecting pieces, and upper covers. Several battery cells are arranged in sequence. Two end plates are respectively arranged on the sides of the two battery cells at the end. An elastic insulating frame is provided between adjacent battery cells. Two steel strips are respectively tied to the upper and lower parts of the two end plates. The end plates are provided with limiting steps to limit the movement of the two steel strips toward the middle. The battery connecting pieces are connected to the upper ends of all battery cells, and the upper cover is provided above the battery connecting pieces.

2. A battery module according to claim 1, characterized in that: The battery connecting piece includes a flexible circuit board, an aluminum busbar, and a nickel sheet. The aluminum busbar connects the positive and negative electrodes of adjacent battery cells, and the nickel sheet is arranged between the aluminum busbar and the flexible circuit board.

3. A battery module according to claim 2, characterized in that: The battery connecting piece includes a plurality of temperature sensors, each temperature sensor is attached to a battery cell, and the temperature sensor is communicatively connected to the flexible circuit board.

4. A battery module according to claim 2, characterized in that: A mica tape is provided above the aluminum row of the battery connecting piece.

5. The battery module according to claim 1, characterized in that: The outer side of the steel belt is covered with a heat shrink tubing.

6. The battery module according to claim 1, characterized in that: An insulating sheet is provided between the end plate and the adjacent battery core.

7. The battery module according to claim 1, characterized in that: The upper ends of the two end plates are respectively provided with a positive terminal and a negative terminal, and the positive terminal and the negative terminal are electrically connected to the battery connecting piece.

8. A battery module according to claim 7, characterized in that: Terminal upper covers are provided above the positive terminal and the negative terminal.

9. A battery module according to claim 8, characterized in that: A snap-fit ​​structure is provided between the terminal upper cover and the positive and negative terminals.

10. The battery module according to claim 1, characterized in that: The end plate is provided with a lifting hole.

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