Reversing electric connection mechanism used between longitudinal double-layer battery cell modules

Abstract

The utility model relates to the technical field of battery packs, in particular to a reversing electric connection mechanism used between longitudinal double-layer battery cell modules, which comprises an upper-layer bracket and a lower-layer bracket which are arranged on the inner wall of a battery pack box body, an upper-layer copper bar mounting seat module is arranged on the upper-layer bracket, and a lower-layer copper bar mounting seat module is arranged on the lower-layer bracket; an upper-layer aluminum bar is arranged on the upper-layer copper bar mounting seat module, and the upper-layer aluminum bar is also electrically connected with the upper-layer battery cell module; a lower-layer aluminum bar is arranged on the lower-layer copper bar mounting seat module and is also electrically connected with the lower-layer battery cell module; the series copper bar comprises a copper bar upper connecting end and a copper bar lower connecting end, the copper bar upper connecting end is electrically connected with the upper-layer aluminum bar, and the copper bar lower connecting end is electrically connected with the lower-layer aluminum bar. The reversing electric connection mechanism is simple in structure, easy to assemble by an operator, high in stability and strong in firmness, and can ensure the stable work of the battery cell module while completely adapting to a high-temperature environment in a battery pack box body.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a commutation electrical connection mechanism for vertical double-layer cell modules. Background Technology

[0002] Currently, new energy vehicles have received widespread attention from all sectors of society due to their excellent environmental performance, and the requirements for them are constantly increasing. As a type of new energy vehicle, electric vehicles are also developing towards higher safety, higher energy density, and lighter weight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet driving requirements.

[0003] Battery packs for electric vehicles typically consist of multiple cell modules. These modules are stacked within the same housing and then connected to each other. The core cell module is configured with a specific number of cells to meet the required output voltage, and all cells are then connected to output the voltage. To meet the battery's power requirements, cell modules are usually arranged as modules, with at least two modules stacked and electrically connected to each other. Stacking methods include horizontal or vertical stacking.

[0004] When stacked vertically, the upper and lower battery cell modules are independently fixed to the battery pack housing using liquid-cooled brackets or other methods. To increase capacity by connecting them in series, a wiring harness is typically used to directly connect the upper and lower battery cell modules. While this method achieves the goal of connecting the upper and lower battery cell modules in series, the battery cell modules generate a lot of heat during operation. Prolonged exposure to high temperatures can easily cause the wiring harness to age, or the connections to detach or break, thus affecting the normal operation of the battery pack. Furthermore, using a wiring harness requires a higher level of skill from the operator during assembly, necessitating the assurance of high-quality welding.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the problems of the prior art and provide a commutation electrical connection mechanism between vertical double-layer battery cell modules. This mechanism solves the problems of easy aging, desoldering or breakage in high-temperature environments caused by the use of wire harnesses in the traditional technology, as well as the technical problem of high assembly requirements for operators.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A reversing electrical connection mechanism for vertically arranged double-layer battery cell modules includes an upper support and a lower support disposed on the inner wall of a battery pack housing. An upper copper busbar mounting module is disposed on the upper support, and a lower copper busbar mounting module is disposed on the lower support. An upper aluminum busbar is disposed on the upper copper busbar mounting module and is electrically connected to the upper battery cell module. A lower aluminum busbar is disposed on the lower copper busbar mounting module and is electrically connected to the lower battery cell module. The mechanism also includes a vertically arranged series copper busbar, comprising a busbar body and upper and lower connecting ends disposed at both ends of the busbar body. The upper connecting end is electrically connected to the upper aluminum busbar, and the lower connecting end is electrically connected to the lower aluminum busbar.

[0009] Furthermore, the upper support and the lower support have the same specifications, both being triangular supports, including a first support side and a second support side that are perpendicular to each other, and a third support side connecting the first support side and the second support side. The upper copper busbar mounting module and the lower copper busbar mounting module are both disposed on the second support side.

[0010] Furthermore, the upper copper busbar mounting base module and the lower copper busbar mounting base module have the same specifications, both including a copper busbar mounting base, on which a locking nut is embedded and a matching locking bolt is provided.

[0011] Furthermore, the upper aluminum bar is used for an upper aluminum bar cell connection part for electrical connection with the upper aluminum bar cell module. The upper aluminum bar cell connection part is provided with an upper aluminum bar commutation part, and the upper aluminum bar commutation part is provided with an upper aluminum bar connection part for connection with the upper copper busbar mounting base module. The lower aluminum bar is used for a lower aluminum bar cell connection part for electrical connection with the lower aluminum bar cell module. The lower aluminum bar cell connection part is provided with a lower aluminum bar commutation part, and the lower aluminum bar commutation part is provided with a lower aluminum bar connection part for connection with the lower copper busbar mounting base module. Both the upper aluminum bar connection part and the lower aluminum bar connection part are provided with aluminum bar through holes through which the locking bolt can pass.

[0012] Furthermore, the upper aluminum battery cell connection part and the upper aluminum battery commutation part are connected at an angle, and the upper aluminum battery commutation part and the upper aluminum battery connection part are connected at an angle; the lower aluminum battery cell connection part and the lower aluminum battery commutation part are connected at an angle, and the lower aluminum battery commutation part and the lower aluminum battery connection part are connected at an angle.

[0013] Furthermore, both the upper connecting end and the lower connecting end of the copper busbar are provided with copper busbar through holes through which the locking bolts can pass.

[0014] Furthermore, the upper connecting end and the lower connecting end of the copper busbar are respectively connected to the copper busbar body at right angles, forming a Z-shape.

[0015] Furthermore, a slot is provided on the second support side, and correspondingly, the bottom of the copper busbar mounting base is provided with a locking foot that can engage with the slot.

[0016] Furthermore, the copper busbar mounting base is rectangular, and the locking nut is located at the axial center.

[0017] Furthermore, the copper busbar mounting base is made of insulating material.

[0018] This utility model provides a commutation electrical connection mechanism for vertically arranged double-layer battery cell modules. A bracket installed on the inner wall of the battery pack housing provides robust support for the copper busbar mounting base. Stable series connection between the upper and lower battery cell modules is achieved through the electrical connection between the longitudinally arranged series copper busbars and the aluminum bars on the upper and lower battery cell modules via the copper busbar mounting bases. This commutation electrical connection mechanism is not only simple in structure and easy for operators to assemble, but also highly stable and robust. It can fully adapt to the high-temperature environment inside the battery pack housing while ensuring the stable operation of the battery cell modules. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the commutation electrical connection mechanism between longitudinal double-layer cell modules and the battery pack housing described in this utility model.

[0020] Figure 2 This is a schematic diagram of the commutation electrical connection mechanism between longitudinal double-layer battery cell modules and its application in battery cell modules, as described in this utility model.

[0021] Figure 3 This is a schematic diagram of the commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to the present invention.

[0022] Figure 4 This is a schematic diagram of the series copper busbar in the commutation electrical connection mechanism between longitudinal double-layer battery cell modules described in this utility model;

[0023] Figure 5 This is a schematic diagram showing the connection of the copper busbar mounting base, locking bolts, and bracket in a commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to the present invention.

[0024] Figure 6 This is a schematic diagram of the clamping foot structure of the copper busbar mounting base in the commutation electrical connection mechanism between longitudinal double-layer battery cell modules described in this utility model;

[0025] Figure 7This is a cross-sectional view of the copper busbar mounting base in the commutation electrical connection mechanism between longitudinal double-layer battery cell modules described in this utility model.

[0026] Illustration markings:

[0027] 1-Battery pack housing;

[0028] 2-Upper support;

[0029] 3-Lower support;

[0030] 4-Upper aluminum bar, 401-Upper aluminum bar cell connection part, 402-Upper aluminum bar commutation part, 403-Upper aluminum bar connection part;

[0031] 5-Lower layer aluminum bar, 501-Lower layer aluminum bar cell connection part, 502-Lower layer aluminum bar commutation part, 503-Lower layer aluminum bar connection part;

[0032] 6-Series copper busbar, 601-Copper busbar body, 602-Upper connection end of copper busbar, 603-Lower connection end of copper busbar, 604-Through hole of copper busbar;

[0033] 7-Upper copper busbar mounting base module, 8-Lower copper busbar mounting base module, 9-Upper battery cell module, 10-Lower battery cell module, 11-First support side, 12-Second support side, 13-Third support side, 14-Slot, 15-Copper busbar mounting base, 16-Locking nut, 17-Locking bolt, 18-Clamping foot. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] like Figure 1 and Figure 2 As shown, this solution provides a reversing electrical connection mechanism between vertically stacked double-layer battery cell modules, including an upper support 2 and a lower support 3 disposed on the inner wall of the battery pack housing 1. The upper support 2 is provided with an upper copper busbar mounting module 7, and the lower support 3 is provided with a lower copper busbar mounting module 8. The upper copper busbar mounting module 7 is provided with an upper aluminum busbar 4, which is also electrically connected to the upper battery cell module 9. The lower copper busbar mounting module 8 is provided with a lower aluminum busbar 5, which is also electrically connected to the lower battery cell module 10.

[0036] It also includes a longitudinally arranged series copper busbar 6, which includes a copper busbar body 601 and upper copper busbar connection end 602 and lower copper busbar connection end 603 disposed at both ends of the copper busbar body 601. The upper copper busbar connection end 602 is electrically connected to the upper aluminum busbar 4, and the lower copper busbar connection end 603 is electrically connected to the lower aluminum busbar 5.

[0037] The dual-layer cell module includes an upper cell module 9 and a lower cell module 10 stacked and fixed inside the battery pack housing. The cells of the upper cell module 9 are connected in parallel and have an upper aluminum busbar 4 pre-installed externally. Similarly, the cells of the lower cell module 10 are connected in parallel and have a lower aluminum busbar 5 pre-installed externally. A longitudinally arranged series copper busbar 6 connects the upper connecting end 602 of the copper busbar to the upper aluminum busbar 4 and fixes it to the upper copper busbar mounting module 7. The lower connecting end 603 of the copper busbar connects the lower aluminum busbar 5 and fixes it to the lower copper busbar mounting module 8, thereby achieving a longitudinal electrical connection between the upper cell module 9 and the lower cell module 10.

[0038] Compared to traditional wire harness connections, since each copper busbar mounting base 15 is fixed to the bracket set on the inner wall of the battery pack housing 1, it is easier for operators to assemble and the connection is more secure.

[0039] like Figure 5 As shown, in this embodiment, the upper support 2 and the lower support 3 are of the same specification and are both triangular supports, including a first support side 11 and a second support side 12 that are perpendicular to each other, and a third support side 13 connecting the first support side 11 and the second support side 12. The upper copper busbar mounting module 7 and the lower copper busbar mounting module 8 are both disposed on the second support side 12.

[0040] The first support edge 11 is arranged vertically and is used to be fixed to the inner wall of the battery pack housing 1. The fixing method includes, but is not limited to, screw connection, glue bonding or welding.

[0041] The second support edge 12 is arranged horizontally to fix the upper copper busbar mounting base module 7 and the lower copper busbar mounting base module 8 and keep them horizontal, so as to facilitate the quick connection of the aluminum busbar and the series copper busbar 6 in the future.

[0042] like Figure 5 As shown, in this embodiment, the upper copper busbar mounting module 7 and the lower copper busbar mounting module 8 have the same specifications, both including a copper busbar mounting base 15. A locking nut 16 is embedded in the copper busbar mounting base 15, and a matching locking bolt 17 is provided. Through the interaction between the locking bolt 17 and the locking nut 16, the connection ends of the aluminum busbar and the series copper busbar 6 can be mutually pressed and electrically connected, ensuring a strong connection.

[0043] like Figure 3 As shown, in this embodiment, the upper aluminum bar 4 is used for an upper aluminum bar cell connection part 401 that is electrically connected to the upper aluminum bar cell module 9. The upper aluminum bar cell connection part 401 is provided with an upper aluminum bar commutation part 402, and the upper aluminum bar commutation part 402 is provided with an upper aluminum bar connection part 403 for connecting to the upper copper busbar mounting base module 7.

[0044] The lower aluminum bus 5 is used for the lower aluminum bus cell connection part 501 for electrical connection with the lower aluminum bus cell module 10. The lower aluminum bus cell connection part 501 is provided with a lower aluminum bus commutation part 502, and the lower aluminum bus commutation part 502 is provided with a lower aluminum bus connection part 503 for connection with the lower copper bus mounting base module 8.

[0045] Both the upper aluminum bar connecting part 403 and the lower aluminum bar connecting part 503 are provided with aluminum bar through holes through which the locking bolt 17 can pass.

[0046] By electrically connecting the upper aluminum bar cell connection part 401 to the upper cell module 9, and connecting the upper aluminum bar connection part 403 to the upper copper bus mounting base module 7, the upper aluminum bar commutation part 402 enables the commutation electrical connection of the upper cell module 9.

[0047] By electrically connecting the lower aluminum bus cell connection part 501 to the lower cell module 10, and connecting the lower aluminum bus connection part 503 to the lower copper bus mounting base module 8, the lower aluminum bus commutation part 502 enables the commutation electrical connection to the lower cell module 10.

[0048] The aluminum bar can be securely locked onto the copper busbar mounting base 15 by the interaction between the locking bolt 17 and the through hole of the aluminum bar.

[0049] As an optimization of this embodiment, the upper aluminum bar cell connection part 401 and the upper aluminum bar commutation part 402 are connected at an angle, and the upper aluminum bar commutation part 402 and the upper aluminum bar connection part 403 are connected at an angle; the lower aluminum bar cell connection part 501 and the lower aluminum bar commutation part 502 are connected at an angle, and the lower aluminum bar commutation part 502 and the lower aluminum bar connection part 503 are connected at an angle.

[0050] As a specific embodiment of this solution, the upper aluminum bus cell connection part 401 is at a 90° angle to the upper aluminum bus commutation part 402, and the upper aluminum bus commutation part 402 is at a 90° angle to the upper aluminum bus connection part 403; the lower aluminum bus cell connection part 501 is at a 90° angle to the lower aluminum bus commutation part 502, and the lower aluminum bus commutation part 502 is at a 90° angle to the lower aluminum bus connection part 503. This 90° angle not only ensures correct commutation orientation but also provides more space for operators to perform connection and assembly operations, such as tightening the aluminum bus connection part onto the copper bus mounting base 15 using the locking bolt 17.

[0051] like Figure 4 As shown, both the upper connecting end 602 and the lower connecting end 603 of the copper busbar are provided with copper busbar through holes 604 through which the locking bolt 17 can pass. The copper busbar is securely connected to the copper busbar mounting base 15 by the locking bolt 17 passing through the copper busbar through the through hole 604.

[0052] Specifically, the upper connecting end 602 and the lower connecting end 603 of the copper busbar are respectively connected to the copper busbar body 601 at right angles, forming a Z-shape. This structure ensures that during assembly, the copper busbar through holes 604 on the upper connecting end 602 and the lower connecting end 603 are fully exposed to the outside, facilitating the operator to tighten the locking bolts 17.

[0053] like Figures 5-7 As shown, a slot 14 is provided on the second support edge 12 of the bracket, and correspondingly, a locking foot 18 is provided at the bottom of the copper busbar mounting base 15, which can be engaged with the slot 14. The mutual engagement between the locking foot 18 and the slot 14 enables a more efficient and rapid connection between the copper busbar mounting base 15 and the triangular bracket.

[0054] Specifically, the copper busbar mounting base 15 is rectangular, the locking nut 16 is located at the axial center, and the copper busbar mounting base 15 is made of insulating material, such as hard plastic.

[0055] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A commutation electrical connection mechanism between longitudinally mounted double-layer battery cell modules, characterized in that, The battery pack includes an upper bracket (2) and a lower bracket (3) disposed on the inner wall of the battery pack housing (1). The upper bracket (2) is provided with an upper copper busbar mounting module (7), and the lower bracket (3) is provided with a lower copper busbar mounting module (8). The upper copper busbar mounting module (7) is provided with an upper aluminum busbar (4), which is also electrically connected to an upper battery cell module (9). The lower copper busbar mounting module (8) is provided with a lower aluminum busbar (5), which is also electrically connected to a lower battery cell module (10). It also includes a longitudinally arranged series copper busbar (6), which includes a copper busbar body (601) and upper copper busbar connection end (602) and lower copper busbar connection end (603) disposed at both ends of the copper busbar body (601). The upper copper busbar connection end (602) is electrically connected to the upper aluminum busbar (4), and the lower copper busbar connection end (603) is electrically connected to the lower aluminum busbar (5).

2. The commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 1, characterized in that, The upper support (2) and the lower support (3) are identical in specifications, both being triangular supports, including a first support side (11) and a second support side (12) that are perpendicular to each other, and a third support side (13) connecting the first support side (11) and the second support side (12). The upper copper busbar mounting module (7) and the lower copper busbar mounting module (8) are both located on the second support side (12).

3. The commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 2, characterized in that, The upper copper busbar mounting base module (7) and the lower copper busbar mounting base module (8) have the same specifications and both include a copper busbar mounting base (15). The copper busbar mounting base (15) is fitted with a locking nut (16) and is provided with a matching locking bolt (17).

4. The commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 3, characterized in that, The upper aluminum bus (4) is used for an upper aluminum bus cell connection part (401) for electrical connection with the upper aluminum bus cell module (9). The upper aluminum bus cell connection part (401) is provided with an upper aluminum bus commutation part (402), and the upper aluminum bus commutation part (402) is provided with an upper aluminum bus connection part (403) for connection with the upper copper bus mounting base module (7). The lower aluminum bus (5) is used for the lower aluminum bus cell connection part (501) for electrical connection with the lower aluminum bus cell module (10). The lower aluminum bus cell connection part (501) is provided with a lower aluminum bus commutation part (502), and the lower aluminum bus commutation part (502) is provided with a lower aluminum bus connection part (503) for connection with the lower copper bus mounting base module (8). Both the upper aluminum bar connector (403) and the lower aluminum bar connector (503) are provided with aluminum bar through holes through which the locking bolt (17) can pass.

5. A commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 4, characterized in that, The upper aluminum battery cell connection part (401) and the upper aluminum battery commutation part (402) are connected at an angle, and the upper aluminum battery commutation part (402) and the upper aluminum battery connection part (403) are connected at an angle; the lower aluminum battery cell connection part (501) and the lower aluminum battery commutation part (502) are connected at an angle, and the lower aluminum battery commutation part (502) and the lower aluminum battery connection part (503) are connected at an angle.

6. The commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 3, characterized in that, Both the upper connecting end (602) and the lower connecting end (603) of the copper busbar are provided with copper busbar through holes (604) through which the locking bolt (17) can pass.

7. A commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 6, characterized in that, The upper connecting end (602) and the lower connecting end (603) of the copper busbar are respectively connected at right angles to the copper busbar body (601) to form a Z-shape.

8. A commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 3, characterized in that, The second support edge (12) is provided with a slot (14), and correspondingly, the bottom of the copper busbar mounting base (15) is provided with a locking foot (18) that can be locked with the slot (14).

9. A commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 3, characterized in that, The copper busbar mounting base (15) is rectangular, and the locking nut (16) is located at the axial center.

10. A commutation electrical connection mechanism between longitudinal double-layer battery cell modules according to claim 3 or 9, characterized in that, The copper busbar mounting base (15) is made of insulating material.

Images