Electric connection mechanism of double-layer battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to an electric connection mechanism of a double-layer battery pack, which comprises a battery pack bracket, two battery pack mounting positions are arranged on the battery pack bracket in an up-and-down manner, and two battery packs are respectively mounted on the battery pack bracket; each battery pack comprises a battery cell module and a battery pack box body with a battery cell module mounting position, the inner sides of a pair of inner walls of the battery pack box body are provided with battery cell end plates capable of limiting the battery cell module, and the two battery cell end plates are provided with electric connection assemblies; the battery pack single-core connector is arranged on the outer wall of the battery pack box body and is used for connecting the battery cell module with the battery pack single-core connector arranged on the outer wall of the battery pack box body; and the battery single-core connector is connected with a high-voltage box device on the outer side through a wire harness. The electric connection mechanism of the double-layer battery pack is simple in structure, fast and efficient in wiring, capable of effectively enhancing the wiring firmness and stability in the battery pack, and not prone to the problem of line abrasion or breakage caused by external positive oscillation.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to an electrical connection mechanism for a double-layer battery pack. Background Art

[0002] At present, new energy vehicles have received extensive 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 an electric vehicle 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 an electric vehicle is generally a battery pack composed of multiple battery cell modules, that is, multiple battery cell modules are 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. The voltage output of the battery module needs to be pre-wired to an external high-voltage box device, and then the high-voltage box outputs a stable voltage.

[0004] Currently, for the wiring between the battery module and the high-voltage box device, it is directly in series in each battery module, and then two flexible buses directly penetrate the box and are wired to the external high-voltage box device. In this structure, since the bus is directly hidden around the battery module, it is prone to aging during long-term use, which may cause damage to the bus; or due to external vibration, the battery module may cause wear to the bus, which will bring potential safety hazards.

[0005] When multiple battery packs need to be electrically connected to the high-voltage box device, the stacking and installation of multiple battery packs are very inconvenient; in addition, the direct wire harness connection is also rather cumbersome, the wiring is inconvenient, and it is prone to potential safety hazards during long-term use.

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

[0007] The purpose of the utility model is to overcome the problems of the above-mentioned existing technologies, and provides an electrical connection mechanism for a double-layer battery pack, which is used to solve the technical problems that when using a flexible bus to connect the battery module and the high-voltage box device, it is prone to aging, when affected by external vibration, the battery module causes wear to the bus, and when multiple battery packs need to be electrically connected to the high-voltage box device, the current direct wire harness connection is rather cumbersome, the wiring is inconvenient, and it is prone to potential safety hazards during long-term use.

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

[0009] An electrical connection mechanism for a double-layer battery pack, including a battery pack bracket. On the battery pack frame, there are a first battery pack mounting position and a second battery pack mounting position arranged vertically. A first battery pack and a second battery pack are respectively installed on the first battery mounting position and the second battery mounting position. Both the first battery pack and the second battery include a battery cell module and a battery pack box body with a battery cell module mounting position. On the inner sides of a pair of inner walls of the battery pack box body, there are battery cell end plates that can limit two electrical connection ends of the battery cell module. On the two battery cell end plates, there are electrical connection components for realizing the connection between the battery cell module and the battery pack single-core connector arranged on the outer wall of the battery pack box body. The battery pack single-core connector is connected to an external high-voltage box device through a wire harness.

[0010] Further, at the same end of the two battery cell end plates, there are terminal clamping positions, and on one side of the battery cell module located in the terminal clamping positions, there is an electrical connection copper bar.

[0011] Further, the electrical connection component includes a wiring terminal arranged in the terminal clamping position and a conductive copper bar connected to the wiring terminal. The other end of the conductive copper bar can be connected to the battery pack single-core connector.

[0012] Further, on the outside of the wiring terminal, there is a copper bar card slot with an upward opening.

[0013] Further, on a set of side edges of the first battery pack and the second battery pack, there are battery pack side wings that can be connected to the first battery pack mounting position or the second battery pack mounting position.

[0014] Further, the battery pack bracket includes symmetrically arranged frame plates, and the two frame plates are connected by two sets of support plate groups.

[0015] Further, the support plate group includes a first support plate and a second support plate arranged vertically. The two first support plates can support the battery pack side wings of the first battery pack located in the upper layer, and the two second support plates can support the battery pack side wings of the second battery pack located in the lower layer.

[0016] Further, there are several battery pack side wing connection holes on the battery pack side wings, and they are fixedly connected to the first support plate or the second support plate through screws.

[0017] Further, the battery cell end plates are made of aluminum alloy material.

[0018] Further, on the outer wall of the high-voltage box device, there is a high-voltage box single-core connector, which is connected to each battery pack single-core connector through a wire harness.

[0019] The electrical connection mechanism of a double-layer battery pack provided by the present utility model realizes the longitudinal fixation of two battery packs on the vehicle frame through a battery pack bracket. By arranging a battery cell end plate and an electrical connection component inside the battery pack box, the electrical connection component is further used to quickly connect the battery cell module and the battery pack single-core connector, without using flexible cable connection and with less wiring. For the connection between the battery pack and the high-voltage box device, the battery pack single-core connector and the high-voltage box single-core connector are directly connected by a wire harness, which is efficient and fast. The electrical connection mechanism of the double-layer battery pack is not only simple in structure, but also fast and efficient in wiring, which can effectively enhance the wiring firmness and stability inside the battery pack and is not easily subject to problems such as wire abrasion or breakage caused by external positive shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Fig. 6 is a schematic structural diagram of the first perspective of the electrical connection mechanism of a double-layer battery pack according to the present utility model;

[0021] Figure 2 Fig. 10 is a schematic structural diagram of the second perspective of the electrical connection mechanism of a double-layer battery pack according to the present utility model;

[0022] Figure 3 Fig. 14 is a schematic diagram of the internal structure of the battery pack in the electrical connection mechanism of a double-layer battery pack according to the present utility model;

[0023] Figure 4 Fig. 18 is an assembly diagram of the internal structure of the battery pack in the electrical connection mechanism of a double-layer battery pack according to the present utility model;

[0024] Figure 5 Fig. 22 is a schematic diagram of the structure of the battery pack bracket in the electrical connection mechanism of a double-layer battery pack according to the present utility model.

[0025] Reference Signs:

[0026] 1 - Battery pack bracket, 101 - First battery pack installation position, 102 - Second battery pack installation position, 103 - Frame plate, 104 - Support plate group, 105 - First support plate, 106 - Second support plate;

[0027] 2 - Electrical connection component, 201 - Wiring terminal, 202 - Conductive copper bar, 203 - Copper row card slot;

[0028] 3 - Battery cell module, 301 - Electrical connection copper row;

[0029] 4 - Battery pack box, 401 - Battery cell module installation position;

[0030] 5 - Battery cell end plate, 501 - Terminal card position;

[0031] 6 - Battery pack flank, 601 - Battery pack flank connection hole;

[0032] 7 - Battery pack single - cell connector;

[0033] 8 - High - voltage box device;

[0034] 9 - High - voltage box single - cell connector;

[0035] 10 - First battery pack;

[0036] 11 - Second battery pack. Detailed implementation mode

[0037] The following further elaborates on the present utility model according to the attached drawings and embodiments. The described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0038] As Figures 1 to 5 shown, this solution provides an electrical connection mechanism for a double - layer battery pack, including a battery pack bracket 1. On the battery pack bracket 1, there are arranged a first battery pack installation position 101 and a second battery pack installation position 102 arranged vertically. The first battery pack installation position 101 and the second battery pack installation position 102 are respectively installed with a first battery pack 10 and a second battery pack 11;

[0039] Both the first battery pack 10 and the second battery pack 11 include a battery cell module 3 and a battery pack box body 4 with a battery cell module installation position 401. On the inner sides of a pair of inner walls of the battery pack box body 4, there are battery cell end plates 5 that can limit the two electrical connection ends of the battery cell module 3. On the two battery cell end plates 5, there are electrical connection components 2 for realizing the connection between the battery cell module 3 and the battery pack single - cell connector 7 arranged on the outer wall of the battery pack box body 4;

[0040] The battery pack single - cell connector 7 is connected to the external high - voltage box device 8 through a wire harness, finally realizing the connection of the two battery packs to the high - voltage box device 8 respectively, so as to facilitate subsequent voltage output or battery pack charging. Moreover, the vertical stacking of the two battery packs is realized, further optimizing the simplicity of the connection line.

[0041] It should be noted that in this embodiment, the battery pack bracket 1 is fixedly connected to the vehicle frame by welding or screwing, realizing the firm fixation of the battery pack on the frame.

[0042] In addition, the height of the two battery cell end plates 5 is not less than the height of the battery cell module 3. Through this structure, stable clamping of both ends of the battery cell module 3 can be realized, ensuring that the battery cell module 3 is firmly clamped between the two battery cell end plates 5.

[0043] The battery cell end plate 5 is made of aluminum alloy, which has the advantages of light weight and high strength, and can well protect the battery cell module in the battery pack box body 4.

[0044] A high-voltage box single-core connector 9 is arranged on the outer wall of the high-voltage box device 8 and is connected to each battery pack single-core connector 7 through a wire harness, so as to realize the quick electrical connection of two battery packs to the high-voltage box device 8.

[0045] As Figure 4 shown, in this embodiment, terminal clamping positions 501 are opened at the same end of the two battery cell end plates 5, and an electrically conductive copper row 301 is arranged on one side of the battery cell module 3 located in the terminal clamping position 501. This structure can ensure the short-distance connection between the electrically conductive copper row 301 and the electrical connection component 2, thereby reducing the wiring length, making the space inside the battery pack neater, and at the same time avoiding excessive wiring being affected by the external vibration of the battery pack, causing wear of the battery cell module 3 to the bus, which will bring potential safety hazards.

[0046] As Figure 3 and Figure 4 shown, in this embodiment, the electrical connection component 2 includes a wiring terminal 201 arranged in the terminal clamping position 501 and a conductive copper bar 202 connected to the wiring terminal 201. The other end of the conductive copper bar 202 can be connected to the battery pack single-core connector 7, and the connection method can be welding or screw connection.

[0047] As an optimization of this solution, a copper row card slot 203 with an upward opening is arranged on the outer side of the wiring terminal 201. This structure can facilitate the installation of the battery cell module 3 in the battery cell module installation position 401, and the electrically conductive copper row 301 thereon can be directly and quickly inserted into the copper row card slot 203, so as to achieve the purpose of quickly electrically connecting the battery cell module 3 and the electrical connection component 2.

[0048] As Figure 1 and Figure 2 shown, as the longitudinal stacking method of two battery packs in this embodiment, battery pack flanks 6 capable of connecting to the first battery pack installation position 101 or the second battery pack installation position 102 are arranged on a set of side edges of the first battery pack 10 and the second battery pack 11.

[0049] By connecting the battery pack flanks 6 to the first battery pack installation position 101 or the second battery pack installation position 102, the battery pack can be suspended on the battery pack bracket, which is more conducive to the external heat dissipation of the battery pack during work.

[0050] The battery pack bracket 1 includes symmetrically arranged frame plates 103, and the two frame plates 103 are connected by two sets of support plate groups 104 to form a rectangular or cubic outer frame.

[0051] Specifically, the support plate group 104 includes a first support plate 105 and a second support plate 106 arranged up and down. The two first support plates 105 can support the battery pack flanks 6 of the first battery pack 10 located in the upper layer, forming the first battery pack installation position 101 in the upper layer. The two second support plates 106 can support the battery pack flanks 6 of the second battery pack 11 located in the lower layer, forming the second battery pack installation position 102 in the lower layer.

[0052] A number of battery pack flank connection holes 601 are provided on the battery pack flank 6, and are fixed to the first support plate 105 or the second support plate 106 by screws to ensure that the two battery packs are firmly fixed to the battery pack bracket 1.

[0053] The above is only to illustrate the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electrical connection mechanism for a double-layer battery pack, characterized in that: Comprising a battery pack support (1), the battery pack support (1) being provided with a first battery pack mounting position (101) and a second battery pack mounting position (102) arranged vertically, the first battery pack mounting position (101) and the second battery pack mounting position (102) being respectively mounted with a first battery pack (10) and a second battery pack (11); The first battery pack (10) and the second battery pack (11) both comprise a cell module (3) and a battery pack case (4) having a cell module mounting position (401); a pair of inner walls of the battery pack case (4) are provided with cell end plates (5) capable of limiting the two electrical connection ends of the cell module (3); the two cell end plates (5) are provided with electrical connection components (2) for realizing connection between the cell module (3) and a battery pack single-core connector (7) provided on the outer wall of the battery pack case (4); The battery pack single-core connector (7) is connected to an external high-voltage box device (8) via a wiring harness.

2. The electrical connection mechanism of a double-layer battery pack according to claim 1, characterized in that: The same end of the two battery cell end plates (5) is provided with a terminal clamping position (501), and the battery cell module (3) is provided with an electrical connection copper busbar (301) on one side of the terminal clamping position (501).

3. The electrical connection mechanism of a double-layer battery pack according to claim 2, characterized in that: The electrical connection assembly (2) comprises a connection terminal (201) arranged at the terminal clamping position (501), and a conductive copper strip (202) connected to the connection terminal (201), wherein the other end of the conductive copper strip (202) can be connected to the battery pack single-core connector (7).

4. The electrical connection mechanism of a double-layer battery pack according to claim 3, characterized in that: A copper bar slot (203) with an opening facing upward is provided on the outer side of the wiring terminal (201).

5. The electrical connection mechanism of a double-layer battery pack according to claim 1, characterized in that: A set of side edges of the first battery pack (10) and the second battery pack (11) are provided with battery pack side wings (6) capable of being connected to the first battery pack installation position (101) or the second battery pack installation position (102).

6. The electrical connection mechanism of a double-layer battery pack according to claim 5, characterized in that: The battery pack support (1) comprises symmetrically arranged frame plates (103), and two frame plates (103) are connected via two groups of support plate groups (104).

7. The electrical connection mechanism of a double-layer battery pack according to claim 6, characterized in that: The support plate group (104) comprises a first support plate (105) and a second support plate (106) which are arranged in an upper and lower manner; the two first support plates (105) can support the battery pack side wings (6) of the first battery pack (10) located in an upper layer, and the two second support plates (106) can support the battery pack side wings (6) of the second battery pack (11) located in a lower layer.

8. The electrical connection mechanism of a double-layer battery pack according to claim 7, characterized in that: The battery pack side wing (6) is provided with a plurality of battery pack side wing connection holes (601), which are fixedly connected to the first support plate (105) or the second support plate (106) by means of screws.

9. The electrical connection mechanism of a double-layer battery pack according to claim 1, characterized in that: The battery cell end plate (5) is made of aluminum alloy.

10. The electrical connection mechanism of a double-layer battery pack according to claim 1, characterized in that: A high-voltage box single-core connector (9) is provided on the outer wall of the high-voltage box device (8) and is connected to each of the battery pack single-core connectors (7) via a wiring harness.

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