Electric connection mechanism for battery cell module

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery cell module electric connection mechanism which comprises a plurality of battery cell modules which are horizontally stacked, and each battery cell module comprises a left-end battery cell unit, a middle-section battery cell unit and a right-end battery cell unit which are sequentially arranged; the cathode of the left-end cell unit is provided with a cathode busbar, and the anode of the right-end cell unit is provided with an anode busbar; the anode of the left-end battery cell unit is connected in series with the cathode of the middle-section battery cell unit through a series-connection aluminum bar; the anode of the middle-section battery cell unit is connected in series with the cathode of the right-end battery cell unit through a series-connection aluminum bar; and the cathode busbar and the anode busbar are electrically connected with the outside through copper bars. The electrical connection mechanism for the battery cell modules is simple in structure, the assembling efficiency of the battery cell modules can be effectively improved by adopting a modularized serial connection mode, and in addition, the independent and stable working states between the battery cells and between the battery cell modules can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to an electric connection mechanism for a battery cell module. Background Art

[0002] At present, new energy vehicles have attracted wide attention from all sectors of society due to their excellent environmental protection performance, and the requirements for new energy vehicles are also constantly increasing. As a type of new energy vehicle, electric vehicles are also constantly developing in the direction of high safety, high energy ratio, and lightweight. The main factor determining the driving range of electric vehicles is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet the driving requirements.

[0003] The power supply battery for electric vehicles is generally a battery pack composed of multiple battery cell modules, that is, multiple battery cell modules are horizontally stacked in the same box, and then the individual battery cell modules are connected. As the core, the battery cell module generally configures the corresponding number of battery cells according to the magnitude of the voltage to be output, and then connects all the battery cells to output the voltage.

[0004] In the traditional technology, double-sided tape is mostly used for bonding between battery cell modules and between multiple battery cells in a battery cell module. This method not only causes mutual interference in the work of each battery cell, but also is very troublesome when disassembling and overhauling the battery cells.

[0005] In addition, in the traditional battery cell module, the connection between each battery cell mostly uses copper sheet metal for positive and negative connections. If there are many battery cells, it will invisibly increase the complexity of the connection. Moreover, due to the large number of copper sheet metals for electrical connection, the assembly efficiency cannot be effectively improved, and misconnection is likely to occur, bringing potential hazards to the use of the battery pack.

[0006] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the problems of the above-mentioned prior art, and provides an electric connection mechanism for a battery cell module, which is used to solve the technical problems that the connection structure between battery cells in the traditional technology is complex, the assembly efficiency cannot be effectively improved due to the large number of copper sheet metals for electrical connection, and misconnection is likely to occur.

[0008] The above purpose is achieved by the following technical solutions:

[0009] A battery cell module electrical connection mechanism includes a number of battery cell modules stacked horizontally. Each battery cell module includes a left-end battery cell unit, a middle-section battery cell unit, and a right-end battery cell unit arranged in sequence. A cathode busbar is provided at the cathode of the left-end battery cell unit, and an anode busbar is provided at the anode of the right-end battery cell unit. The anode of the left-end battery cell unit is connected in series with the cathode of the middle-section battery cell unit, and the anode of the middle-section battery cell unit is connected in series with the cathode of the right-end battery cell unit through a series aluminum bar. The cathode busbar and the anode busbar are electrically connected to the outside through a copper bar.

[0010] Further, there are 3 battery cell modules, including a first battery cell module, a second battery cell module, and a third battery cell module. The copper bars include a first copper bar, a second copper bar, a third copper bar, and a fourth copper bar. The first copper bar is connected to the cathode busbar in the first battery cell module. The anode busbar in the first battery cell module is connected to the cathode of the right-end battery cell unit in the second battery cell module through the second copper bar. The anode of the left-end battery cell unit in the second battery cell module is connected to the cathode busbar in the third battery cell module through the third copper bar. The fourth copper bar is connected to the anode busbar in the third battery cell module.

[0011] Further, the first copper bar is placed on the left side of the first battery cell module, and the fourth copper bar surrounds the third battery cell module, the second battery cell module, and the first battery cell module and then faces the first copper bar.

[0012] Further, the second copper bar and the third copper bar have the same specifications and are both rectangular copper bars.

[0013] Further, between the first battery cell module and the second battery cell module, and between the second battery cell module and the third battery cell module, they are isolated by an insulating partition.

[0014] Further, the insulating partition includes an insulating plate body and a flanging component.

[0015] Further, the flanging component includes a first flanging provided on the upper side edge of the insulating plate body, a second flanging provided on the left side edge of the insulating plate body, and a third flanging provided on the right side edge of the insulating plate body.

[0016] Further, the insulating partition is made of plastic material.

[0017] Further, the left-end battery cell unit, the right-end battery cell unit, and the middle-section battery cell unit all include two battery cells with the same electrode orientation.

[0018] Further, a loop-shaped frame spacer is provided between adjacent battery cells.

[0019] Beneficial effects

[0020] For an electric connection mechanism of a battery cell module provided by the present utility model, in the same battery cell module, series-connected aluminum bars are used to achieve series connection between two adjacent battery cell units, and a loop frame spacer is used for partitioning between adjacent battery cells, so as to ensure that each battery cell works independently and stably; between adjacent battery cell modules, series connection is carried out in the form of a bus bar and a copper bar, and the external connection ends of the final copper bar are placed at the same position, which is convenient for electrical connection with an external high-voltage box assembly. The electric connection mechanism of this battery cell module not only has a simple structure, but also can effectively improve the assembly efficiency of the battery cell module by adopting a modular series connection method. In addition, it can ensure that the battery cells and the battery cell modules can maintain an independent and stable working state. Brief description of the drawings

[0021] Figure 1 It is a schematic structural diagram of the first perspective of an electric connection mechanism of a battery cell module according to the present utility model;

[0022] Figure 2 It is a schematic structural diagram of the second perspective of an electric connection mechanism of a battery cell module according to the present utility model;

[0023] Figure 3 It is a schematic diagram of the connection between battery cells and a loop frame spacer of an electric connection mechanism of a battery cell module according to the present utility model;

[0024] Figure 4 It is a schematic structural diagram of an insulating partition in an electric connection mechanism of a battery cell module according to the present utility model.

[0025] Illustration marks:

[0026] 1 - Battery cell module, 101 - Left-end battery cell unit, 102 - Middle-section battery cell unit, 103 - Right-end battery cell unit, 104 - Cathode bus bar, 105 - Anode bus bar, 106 - Series-connected aluminum bar, 107 - Battery cell;

[0027] 2 - Copper bar, 201 - First copper bar, 202 - Second copper bar, 203 - Third row, 204 - Fourth copper bar;

[0028] 3 - First battery cell module;

[0029] 4 - Second battery cell module;

[0030] 5 - Third battery cell module;

[0031] 6 - Insulating partition, 601 - Insulating plate body, 602 - Flanging assembly, 603 - First flanging, 604 - Second flanging, 605 - Third flanging;

[0032] 7 - Loop frame spacer. Detailed implementation manners

[0033] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0034] As Figure 1 and Figure 2 shown, this solution provides an electrical connection mechanism for a battery cell module, including a plurality of battery cell modules 1 stacked horizontally. Each battery cell module 1 includes a left-end battery cell unit 101, a middle-section battery cell unit 102, and a right-end battery cell unit 103 arranged in sequence. A cathode busbar 104 is provided at the cathode of the left-end battery cell unit 101, and an anode busbar 105 is provided at the anode of the right-end battery cell unit 103. The anode of the left-end battery cell unit 104 and the cathode of the middle-section battery cell unit 102, as well as the anode of the middle-section battery cell unit 102 and the cathode of the right-end battery cell unit 103, are connected in series through a series aluminum bar 106.

[0035] The cathode busbar 104 and the anode busbar 105 are electrically connected to the outside through a copper bar 2.

[0036] It should be noted that in this embodiment, the middle-section battery cell unit 102 refers to a plurality of battery cell units located between the left-end battery cell unit 101 and the right-end battery cell unit 103, and the number thereof is uncertain, but there is at least 1.

[0037] As a specific embodiment of this solution, there are 3 battery cell modules 1, including a first battery cell module 3, a second battery cell module 4, and a third battery cell module 5. The copper bar 2 includes a first copper bar 201, a second copper bar 202, a third copper bar 203, and a fourth copper bar 204.

[0038] The first copper bar 201 is connected to the cathode busbar 104 in the first battery cell module 3. The second copper bar 202 is connected between the anode busbar 105 in the first battery cell module 3 and the cathode of the right-end battery cell unit 103 in the second battery cell module 4. The third copper bar 203 is connected between the anode of the left-end battery cell unit 101 in the second battery cell module 4 and the cathode busbar 104 in the third battery cell module 5. The fourth copper bar 204 is connected to the anode busbar 105 in the third battery cell module 5.

[0039] In this embodiment, the first copper bar 201 is placed on the left side of the first battery module 3, and the fourth copper bar 204 surrounds the third battery module 5, the second battery module 4 and the first battery module 3 and then faces the first copper bar 201. This structure guides the first copper bar 201 and the fourth copper bar 204 to the left side of the battery module 1, so as to facilitate electrical connection with the high-voltage box assembly arranged on the left side.

[0040] It should be noted that the second copper bar 202 and the third copper bar 203 have the same specifications and are both rectangular copper bars, and are used to achieve longitudinal connection between adjacent battery modules 1 .

[0041] like Figure 2 and Figure 4 As shown, in this embodiment, the first battery cell module 3 and the second battery cell module 4, as well as the second battery cell module 4 and the third battery cell module 5 are isolated by an insulating partition 6. Compared with the conventional technology of using double-sided tape to bond adjacent battery cell modules, the insulating partition 6 used in this solution can ensure that the operation between the three battery cell modules 1 in this embodiment is not affected.

[0042] Specifically, the insulating partition 6 includes an insulating plate body 601 and a flange assembly 602, wherein the insulating plate body is used to separate adjacent battery cell modules, and the flange assembly 602 is used to further isolate and protect the edges of each battery cell module.

[0043] The flange assembly 602 includes a first flange 603 disposed on the upper side of the insulating plate body 601, a second flange 604 disposed on the left side of the insulating plate body 601, and a third flange 605 disposed on the right side of the insulating plate body 601. The first flange 603, the second flange 604 and the third flange 605 can effectively isolate the long side of the corresponding battery cell module 1, so that it is isolated from the adjacent battery cell module 1, thereby better reducing the working interference between the battery cell modules 1.

[0044] Specifically, the insulating partition 6 is made of plastic.

[0045] As an illustration of the structure of the battery cell unit in this embodiment, the left battery cell unit 101 , the right battery cell unit 103 , and the middle battery cell unit 102 all include two battery cells 107 with electrodes facing the same direction.

[0046] Specifically, a circular frame spacer 7 is provided between adjacent battery cells 107, wherein the circular frame spacer 7 has the following functions:

[0047] 1. Insulation: prevent short circuit caused by direct contact between cells, ensuring safe operation of the battery;

[0048] 2. Buffering effect: When the battery is impacted or vibrated, it can play a certain buffering effect to protect the battery cell.

[0049] 3. Fixing effect: It helps the battery cell to maintain a relatively stable position.

[0050] Its material usually has good insulation performance, mechanical strength, chemical stability and other characteristics. In this embodiment, silicone foam or silica aerogel is preferably used.

[0051] The above is only to illustrate the implementation manner of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery module electrical connection mechanism, characterized in that: The invention comprises a plurality of battery cell modules (1) stacked horizontally, each of the battery cell modules (1) comprising a left battery cell unit (101), a middle battery cell unit (102) and a right battery cell unit (103) arranged in sequence; the cathode of the left battery cell unit (101) is provided with a cathode bus bar (104), the anode of the right battery cell unit (103) is provided with an anode bus bar (105), and the anode of the left battery cell unit (101) and the cathode of the middle battery cell unit (102), as well as the anode of the middle battery cell unit (102) and the cathode of the right battery cell unit (103) are connected in series via a series aluminum bus bar (106); The cathode busbar (104) and the anode busbar (105) are electrically connected to the outside via a copper busbar (2).

2. The electric connection mechanism of a battery module according to claim 1, characterized in that: The battery cell modules (1) include three, including a first battery cell module (3), a second battery cell module (4) and a third battery cell module (5); the copper bar (2) includes a first copper bar (201), a second copper bar (202), a third copper bar (203) and a fourth copper bar (204); The cathode busbar (104) in the first battery cell module (3) is connected to the first copper busbar (201); the anode busbar (105) in the first battery cell module (3) is connected to the cathode of the right battery cell unit (103) in the second battery cell module (4) via the second copper busbar (202); the anode of the left battery cell unit (101) in the second battery cell module (4) is connected to the cathode busbar (104) in the third battery cell module (5) via the third copper busbar (203); and the anode busbar (105) in the third battery cell module (5) is connected to the fourth copper busbar (204).

3. The electric connection mechanism of a battery module according to claim 2, characterized in that: The first copper bar (201) is placed on the left side of the first battery cell module (3), and the fourth copper bar (204) surrounds the third battery cell module (5), the second battery cell module (4) and the first battery cell module (3) and then faces the first copper bar (201).

4. The electric connection mechanism of a battery module according to claim 2, characterized in that: The second copper bar (202) and the third copper bar (203) have the same specifications and are both rectangular copper bars.

5. The electric connection mechanism of a battery module according to claim 2 or 3, characterized in that: The first battery cell module (3) and the second battery cell module (4), as well as the second battery cell module (4) and the third battery cell module (5) are isolated by an insulating partition (6).

6. The electric connection mechanism of a battery module according to claim 5, characterized in that: The insulating partition (6) comprises an insulating plate body (601) and a flange assembly (602).

7. The electric connection mechanism of a battery module according to claim 6, characterized in that: The flange assembly (602) comprises a first flange (603) arranged on the upper side of the insulating plate body (601), a second flange (604) arranged on the left side of the insulating plate body (601), and a third flange (605) arranged on the right side of the insulating plate body (601).

8. The electric connection mechanism of a battery module according to claim 5, characterized in that: The insulating partition (6) Made of plastic.

9. The electric connection mechanism of a battery module according to claim 1, characterized in that: The left-end battery cell unit (101), the right-end battery cell unit (103), and the middle battery cell unit (102) all include two battery cells (107) with electrodes facing the same direction.

10. The electric connection mechanism of a battery module according to claim 9, characterized in that: A circular frame spacer (7) is provided between adjacent battery cells (107).

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