Threaded busbar and battery pack

Abstract

The utility model discloses a screw joint busbar and a battery pack comprising the screw joint busbar. The screw joint busbar comprises a pole assembly, a first bus board and a second bus board, the pole assembly comprises a connecting block and wrapping plastic wrapping the connecting block, and the first bus board and the second bus board are fixed to the two sides of the connecting block respectively. And the first bus board and the second bus board are respectively provided with a battery cell connecting part which is used for being connected with a pole terminal of a battery cell. The screw joint busbar structure does not need to be provided with an avoiding structure, and is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a screw-connected busbar and a battery pack comprising the screw-connected busbar. Background Art

[0002] The energy source of a battery pack is composed of multiple modules connected in series or parallel, which are electrically connected via a busbar. To ensure the structural stability of the battery pack, horizontal and vertical beams are often used to support the modules. The presence of these beams necessitates a busbar with corresponding beam-avoidance structures, resulting in a complex busbar structure, large space requirements, and multiple assembly steps. Utility Model Content

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art and provide a screw-connected busbar and a battery pack including the screw-connected busbar. The screw-connected busbar structure does not require an avoidance structure, has a simple structure, and is easy to install.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A screw-connected busbar includes a pole assembly, a first busbar, and a second busbar. The pole assembly includes a connecting block and a wrapping plastic wrapped around the outside of the connecting block. The first busbar and the second busbar are respectively fixed on both sides of the connecting block, and the first busbar and the second busbar are both provided with a cell connecting portion for connecting to the pole terminal of the cell.

[0006] Preferably, a plurality of clips are provided on both sides of the wrapping plastic for connecting with the support beams in the battery pack box.

[0007] Preferably, the buckle is a snap-type buckle.

[0008] Preferably, two buckles are provided on each side of the wrapping plastic, and the buckles on both sides are symmetrically arranged along the vertical center line of the wrapping plastic.

[0009] Preferably, the cell connecting portion is a tapered arch structure with an arc-shaped cross section, and an opening is provided on the side away from the first busbar or the side of the first busbar.

[0010] Preferably, the wrapping plastic wraps around the sides of the connection block, and the first busbar and the second busbar are installed on both end surfaces of the connection block.

[0011] Preferably, the fixing assembly includes bolts and nuts, a first through hole is provided on the connecting block, and a second through hole and a third through hole are provided on the first busbar and the second busbar respectively, and the bolt passes through the second through hole, the first through hole, and the third through hole and is connected to the nut to fix the first busbar and the second busbar on the connecting block.

[0012] Preferably, the fixing components are provided in two groups, and the two groups of fixing components are arranged along the length direction of the connecting block.

[0013] Preferably, the fixing assembly further includes a gasket, which is arranged between the bolt and the first busbar and between the nut and the second busbar.

[0014] The present invention also provides a battery pack, comprising a box body, a support beam arranged in the box body, battery cells arranged on both sides of the support beam, and the above-mentioned screw-connected busbar, wherein the support beam is provided with a mounting hole and a fixing hole, the fixing holes are arranged on both sides of the mounting hole, and the number of the fixing holes is the same as the number of the clips, the connecting block and the wrapping plastic are installed in the mounting hole, and the multiple clips of the wrapping plastic are respectively buckled into the multiple fixing holes, the first busbar and the second busbar respectively extend from the mounting hole of the support beam, and the pole terminals of the battery cells on both sides of the support beam are respectively inserted into the battery cell connecting parts on the first busbar and the second busbar.

[0015] The screw-type busbar in this utility model can be directly inserted through the mounting holes in the box support beam to connect the battery cells on both sides of the support beam. No avoidance structure is required, resulting in a simple structure, small temporary space, and easy installation. This solves the problem of complex busbar structure and large temporary space between modules in existing battery packs, and improves the assembly convenience and space utilization of the entire pack components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the screw-connected busbar in Example 1 of the present utility model;

[0017] Figure 2 This is a partial structural diagram of the screw-connected busbar in Example 1 of the present utility model;

[0018] Figure 3 is a top view of the screw-connected busbar in Example 1 of the present utility model;

[0019] Figure 4 This is a first cross-sectional view of the connection between the screw-connected busbar and the support beam in Example 2 of the present utility model, taken along the vertical mid-axis plane of the connection block;

[0020] Figure 5 This is a front view of the battery pack in Example 2 of the present utility model;

[0021] Figure 6 This is a second cross-sectional view of the connection between the screw-connected busbar and the support beam in Example 2 of the present utility model, taken along the center of the buckle;

[0022] Figure 7 It is a structural diagram of the mounting holes and fixing holes of the support beam in Example 2 of the present utility model.

[0023] In the figure: 100- screw-connected busbar, 110-first busbar, 120-second busbar, 130-connecting block, 140-wrapped plastic, 141-clip, 150-cell connecting part, 160-support beam, 161-mounting hole, 162-fixing hole, 170-bolt, 171-nut, 172-gasket, 200-box, 210-cell. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions of the utility model in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of the utility model.

[0025] In the description of the present invention, it should be noted that the term "upper" and the like to indicate an orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connect," "dispose," "install," "fix," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The utility model provides a screw-connected busbar, comprising a pole assembly, a first busbar, and a second busbar. The pole assembly comprises a connecting block and a wrapping plastic wrapped around the outside of the connecting block. The first busbar and the second busbar are respectively fixed on both sides of the connecting block, and the first busbar and the second busbar are both provided with a cell connecting portion for connecting to the pole terminal of the cell.

[0029] The present invention also provides a battery pack, comprising a box body, a support beam arranged in the box body, battery cells arranged on both sides of the support beam, and the above-mentioned screw-connected busbar, wherein the support beam is provided with a mounting hole and a fixing hole, the fixing holes are arranged on both sides of the mounting hole, and the number of the fixing holes is the same as the number of the clips, the connecting block and the wrapping plastic are installed in the mounting hole, and the multiple clips of the wrapping plastic are respectively buckled into the multiple fixing holes, the first busbar and the second busbar respectively extend from the mounting hole of the support beam, and the pole terminals of the battery cells on both sides of the support beam are respectively inserted into the battery cell connecting parts on the first busbar and the second busbar.

[0030] Example 1

[0031] like Figure 1-3 As shown, this embodiment discloses a screw-type busbar 100, which includes a pole assembly, a first busbar 110, and a second busbar 120. The pole assembly includes a connecting block 130 and a plastic wrapping 140 wrapped around the outside of the connecting block 130. The connecting block 130 is made of metal. The first busbar 110 and the second busbar 120 are respectively fixed to the sides of the connecting block 130. The first busbar 110 and the second busbar 120 are each provided with a cell connection portion 150 for connecting to the pole terminal of the battery cell 210.

[0032] In this embodiment, a plurality of buckles are provided on both sides of the wrapping plastic 140 for connecting with the support beam 160 in the battery pack box 200. Specifically, the buckles are buckle-type buckles.

[0033] Specifically, two buckles are provided on each side of the plastic wrap 140, and the buckles on both sides are symmetrically arranged along the vertical center line of the plastic wrap 140. There are four buckles on both sides of the plastic wrap 140, with the two buckles on one side being respectively arranged at the upper and lower ends of the plastic wrap 140, and the two buckles on the other side being symmetrically arranged therewith.

[0034] like Figure 1As shown, the cell connection portion 150 has a tapered arched structure and is arranged along the length of the first busbar 110 and the second busbar 120. Its cross-section is arc-shaped, and an opening is provided on the side away from the first busbar 110 or the side of the first busbar 110. The cell connection portion 150 is adapted to the tapered pole terminal of the cell 210, and the tapered pole terminal of the cell 210 is connected to the cell connection portion 150 by plugging.

[0035] like Figure 2 、 3 As shown, the wrapping plastic 140 is wrapped around the sides of the connecting block 130 , and the first busbar 110 and the second busbar 120 are installed on both end surfaces of the connecting block 130 , thereby ensuring that the first busbar 110 and the second busbar 120 can be electrically connected to the connecting block 130 .

[0036] like Figure 1 、 3 As shown, the fixing assembly includes a bolt 170 and a nut 171. The connecting block 130 is provided with a first through-hole, and the first and second busbars 110 and 120 are provided with second and third through-holes, respectively. During installation, the first, second, and third through-holes are aligned, and the bolt 170 is then passed through the second, first, and third through-holes in sequence before being connected to the nut 171 to secure the first and second busbars 110 and 120 to the connecting block 130.

[0037] like Figure 3 As shown, the fixing assembly further includes a gasket 172 , which is placed on the bolt 170 and the first busbar 110 , and on the nut 171 and the second busbar 120 .

[0038] like Figure 1 As shown, two sets of fixing assemblies are provided, and the two sets of fixing assemblies are spaced apart along the length direction of the connecting block 130. Specifically, the connecting block 130 is provided with two first through holes, and the first and second busbars 110 and 120 are respectively provided with two sets of second through holes and two sets of third through holes. Accordingly, two sets of bolts 170, nuts 171, and washers 172 are respectively provided.

[0039] The threaded busbar 100 in this embodiment can be directly inserted through the mounting holes 161 on the support beam 160 of the box 200, thereby connecting the battery cells 210 on both sides of the support beam 160. No avoidance structure is required, resulting in a simple structure, small footprint, and easy installation. This solves the problem of complex inter-module busbar structures and large space requirements in existing battery packs, improving the assembly convenience and space utilization of the entire package.

[0040] Example 2

[0041] like Figure 4-7As shown, this embodiment discloses a battery pack, including a box body 200, a support beam 160 arranged in the box body 200, battery cells 210 arranged on both sides of the support beam 160, and also includes the screw-connected busbar 100 in Example 1.

[0042] like Figure 5 As shown, in this embodiment, the support beam 160 is a longitudinal beam arranged longitudinally, and the longitudinal beam divides the box body 200 into two left and right areas, respectively used to place the battery cells 210.

[0043] like Figure 4 、 6 As shown in Figures 7, the cross-section of the support beam 160 in the vertical direction is an I-shape, the middle part of which is a hollow structure, and the side walls on both sides are provided with mounting holes 161 of the same size, and the mounting holes 161 on the side walls on both sides are aligned in position, the size of the mounting hole 161 is adapted to the size of the connecting block 130 and the wrapping plastic 140, the connecting block 130 and the wrapping plastic 140 are installed in the mounting hole 161, and the fixing holes 162 are provided on the side wall on one side of the support beam 160, and the number of the fixing holes 162 is the same as the number of the buckles, both of which are four, and the four fixing holes 162 are arranged on both sides of the mounting hole 161, two are provided on one side, and the mounting holes 161 on both sides are symmetrically arranged.

[0044] The four clips on the wrapping plastic 140 are respectively inserted into the four fixing holes 162 on the side wall of one side of the support beam 160, thereby connecting to the support beam 160. The first busbar 110 and the second busbar 120 respectively extend from the mounting holes 161 on the side walls of the support beam 160, thereby being respectively located on both sides of the support beam 160. The pole terminals of the battery cells 210 on both sides of the support beam 160 are respectively inserted into the battery cell connecting parts 150 on the first busbar 110 and the second busbar 120, thereby connecting the battery cells 210 on both sides of the support beam 160.

[0045] like Figure 2 、 6 As shown in FIG. 7 , specifically, the buckle includes four petal-like structures that can be closed and opened. Before the buckle is inserted into the fixing hole 162 on the support beam 160, the four petal-like structures are closed and passed through the fixing hole 162, and then opened, thereby being firmly clamped on the support beam 160.

[0046] The support beam 160 structure of the battery pack in this embodiment matches the structure of the screw-connected bus 100, allowing the screw-connected bus 100 to directly pass through the mounting hole 161 on the support beam 160 of the box body 200, thereby connecting the battery cells 210 on both sides of the support beam 160. There is no need to set an avoidance structure on the screw-connected bus 100, which simplifies the structure of the screw-connected bus 100, reduces the space occupied by the screw-connected bus 100, and improves the installation efficiency of the battery pack as well as the assembly convenience and space utilization of the entire package components.

[0047] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A screw-connected busbar, characterized in that: It comprises a pole assembly, a first busbar (110), and a second busbar (120). The pole assembly comprises a connection block (130) and a wrapping plastic (140) wrapped around the outside of the connection block (130); the first busbar (110) and the second busbar (120) are respectively fixed on both sides of the connection block (130); and the first busbar (110) and the second busbar (120) are both provided with a cell connection portion (150) for connecting to a pole terminal of a cell (210).

2. The screw-connected busbar according to claim 1, characterized in that: A plurality of buckles are provided on both sides of the wrapping plastic (140) for connecting with the support beam (160) in the battery pack box (200).

3. The screw-connected busbar according to claim 2, characterized in that: The buckle is a snap-type buckle.

4. The screw-connected busbar according to claim 3, characterized in that: Two buckles are respectively provided on both sides of the wrapping plastic (140), and the buckles on both sides are symmetrically arranged along the vertical center line of the wrapping plastic (140).

5. The screw-connected busbar according to claim 2, characterized in that: The cell connecting portion (150) is a tapered arch structure with an arc-shaped cross section, and an opening is provided on the side away from the first busbar (110) or the side of the first busbar (110).

6. The screw-connected busbar according to claim 2, characterized in that: The wrapping plastic (140) wraps around the sides of the connection block (130), and the first busbar (110) and the second busbar (120) are installed on both end surfaces of the connection block (130).

7. The screw-connected busbar according to claim 2, characterized in that: The device further comprises a fixing assembly, the fixing assembly comprising a bolt (170) and a nut (171); a first through hole is provided on the connecting block (130); a second through hole and a third through hole are provided on the first busbar (110) and the second busbar (120), respectively; the bolt (170) passes through the second through hole, the first through hole, and the third through hole and is connected to the nut (171) to fix the first busbar (110) and the second busbar (120) on the connecting block (130).

8. The screw-connected busbar according to claim 7, characterized in that: The fixing components are provided in two groups, and the two groups of fixing components are arranged along the length direction of the connecting block (130).

9. The screw-connected busbar according to claim 7, characterized in that: The fixing assembly further comprises a gasket (172), the gasket (172) being arranged on the bolt (170) and the first busbar (110) and on the nut (171) and the second busbar (120).

10. A battery pack comprising a box (200), a support beam (160) arranged in the box (200), and battery cells (210) arranged on both sides of the support beam (160), characterized in that: Also comprising the screw-connected busbar (100) according to any one of claims 2 to 9, The support beam (160) is provided with a mounting hole (161) and a fixing hole (162), the fixing holes (162) are arranged on both sides of the mounting hole (161), and the number of the fixing holes (162) is the same as the number of the buckles. The connecting block (130) and the wrapping plastic (140) are installed in the installation hole (161), and the multiple buckles of the wrapping plastic (140) are respectively buckled into the multiple fixing holes (162). The first busbar (110) and the second busbar (120) respectively extend from the mounting holes (161) of the support beam (160), and the pole terminals of the battery cells (210) on both sides of the support beam (160) are respectively inserted into the battery cell connecting portions (150) on the first busbar (110) and the second busbar (120).

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