Pole lug support for soft package battery

Abstract

The utility model provides a kind of soft package battery tab support, support main body is the plate frame of plate frame type integrated structure, and waist type tab collection hole is arranged along length direction corresponding to the arrangement of battery group, and V type, W type hollow support bar are alternatively arranged between adjacent tab collection holes;Inverse isosceles trapezoidal groove is provided in the middle of plate frame, U-shaped notch is provided on the outside of W type support bar, and positioning pin and wedge-shaped support bar are provided at the end of plate frame.The support can effectively protect the tab and the battery cell, reduce the weight of the battery pack, improve the energy density, enhance the overall insulation of the battery pack, electrical safety and structural stability, improve the space utilization, and is suitable for the tab support and fixation of soft package battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a tab support for a soft-pack battery. Background Technology

[0002] With the development of various technologies and applications in the new energy field, and the changes in the current international situation, new energy batteries have attracted much attention and have a huge market prospect. Soft-pack lithium-ion batteries have advantages such as light weight, high energy density, good safety performance, long cycle life, and large battery capacity, and have been widely used in the new energy field.

[0003] Compared to other types of battery packs, soft-pack lithium-ion battery packs require the positive and negative tabs of the bare cell output terminals to be welded together in a series-parallel design. Then, the tabs and connecting pieces are welded together to achieve the series-parallel connection between the cells. The bare cell tabs are thin and easily damaged during stretching, making welding difficult. Furthermore, longer tabs can lead to tab redundancy, increasing the risk of tab insertion and potentially causing internal short circuits, resulting in battery failure. In existing technologies, to achieve insulation between the bare cell body and the tabs and to better weld and fix the tabs to the battery connecting pieces, tab brackets are typically placed between the bare cell and the battery connecting pieces. However, due to the internal structure limitations of the bare cell, the designed tab brackets are difficult to assemble, and the tabs are easily damaged when passing through the tab bracket. Welding within the tab bracket after it passes through is difficult and inefficient. Additionally, the regular tab bracket structure cannot meet the requirements for lightweight battery packs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a soft-pack battery tab holder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a soft-pack battery tab support, comprising: a frame 1, tab gathering holes 2, and support strips 3;

[0006] The board frame 1 is an integral board frame structure. Multiple fixing screw holes 7 are provided through the board frame 1. The board frame 1 is connected to the external PCB sampling board by screws through the fixing screw holes 7.

[0007] The tab collection holes 2 are arranged on the plate frame 1 along the length of the plate frame 1, and are alternately distributed as positive tab collection holes and negative tab collection holes along the width of the plate frame 1. The tab bundles of the external battery cell group are correspondingly inserted into the tab collection holes 2.

[0008] The support bar 3 is disposed on the upper surface of the plate frame 1, and V-shaped support bars and W-shaped support bars are alternately distributed along the length direction of the plate frame 1. One support bar 3 is disposed between two adjacent tab convergence holes 2. The support bar 3 is a hollow shell structure with the fixing screw hole 7 inside. The support bar 3 is connected to the external PCB sampling board and the external battery input or output busbar screw through the fixing screw hole 7. The bottom of the support bar 3 has a rounded structure, and the bottom of the support bar 3 abuts against the upper surface of the external battery cell assembly to fix the external battery cell assembly.

[0009] In one embodiment, the tab receiving hole 2 is a waist-shaped hole structure; the length of the tab receiving hole 2 is 1.2 to 1.3 times the length of the tab bundle passing through it, and the width of the tab receiving hole 2 is 2.5 to 3 times the width of the tab bundle passing through it; the bottom of the tab receiving hole 2 is provided with a chamfer structure and a rounded structure in sequence, and the chamfer structure and the rounded structure together form an eight-shaped tab guiding structure, which is used to guide the tab bundle to pass through the tab receiving hole 2.

[0010] In one embodiment, a U-shaped notch 4 is also included;

[0011] The U-shaped notch 4 is formed on the outer side of the W-shaped support strip on the upper surface of the plate frame 1, and the U-shaped notch 4 extends through the thickness direction of the plate frame 1 to accommodate the temperature sampling wire harness of the external battery module.

[0012] In one embodiment, a trapezoidal groove 5 is also included;

[0013] The trapezoidal groove 5 is an inverted isosceles trapezoidal groove structure, which is opened at the middle position of the length direction of the board frame 1; the length of the lower base of the trapezoidal groove 5 is twice the length of the upper base, and the left and right ends of the trapezoidal groove 5 are provided with fixing posts, and the fixing posts are provided with fixing screw holes 7. The height of the fixing posts is the same as the height of the board frame 1, and the fixing posts are connected to the external PCB sampling board screws through the fixing screw holes 7.

[0014] In one embodiment, a wedge-shaped support strip 6 is also included;

[0015] Two wedge-shaped support bars 6 are provided and symmetrically arranged at both ends of the plate frame 1 along its length. The lower surface of the wedge-shaped support bar 6 abuts against the upper surface of the external cell assembly. The wedge-shaped support bar 6 is spaced apart from the left V-shaped support bar and the right W-shaped support bar, respectively, to separate the tabs at the end of the external cell assembly from the external battery pack housing.

[0016] In one embodiment, a locating pin 8 is also included;

[0017] The positioning pin 8 is provided in two symmetrical positions at both ends of the plate frame 1 along its length. The positioning pin 8 is located between the end tab convergence hole 2 and the adjacent support bar 3. The height of the positioning pin 8 is higher than the thickness of the external battery input or output busbar. The positioning pin 8 is embedded in the semi-cylindrical holes on the left and right edges of the external battery input or output busbar to limit the busbar displacement.

[0018] As can be seen from the above, the soft-pack battery tab bracket provided by this utility model adopts an integrated plate and frame structure and is equipped with scientifically designed functional components, which effectively solves the problems of tab damage, difficult assembly, insufficient lightweight and electrical safety hazards in the prior art. The device utilizes a waist-shaped tab convergence hole and a figure-eight-shaped guide structure at the bottom to improve the efficiency of tab connection and prevent wear on the tabs from the bracket, ensuring electrical safety. V-shaped and W-shaped hollow shell support bars reduce bracket weight and increase battery pack energy density, while the rounded bottom structure prevents scratches on the aluminum-plastic film of the battery cells. Internal screw holes strengthen the fixation to the PCB sampling board and battery busbar, enhancing structural stability. The inverted isosceles trapezoidal groove and built-in fixing column in the middle of the frame effectively decompose bracket stress, further strengthening cell fixation and PCB sampling board support. The U-shaped notch provides reasonable space for the temperature sampling harness, improving space utilization, and also serves as a stress release point to enhance bracket strength. End positioning pins, embedded in the semi-cylindrical holes of the busbar, prevent busbar rotation and displacement. Wedge-shaped support bars separate the end tabs of the battery cells from the battery pack housing, providing dual protection for the overall insulation and electrical safety of the battery pack. The symmetrical design of the wedge-shaped support bars ensures the bracket's center of gravity is centered, further improving the structural stability of the battery pack. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a soft-pack battery tab support structure according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the screw hole structure in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figure 1 The diagram shows a schematic of a soft-pack battery tab support structure and Figure 2 The schematic diagram of the fixing screw hole structure shown includes: plate frame 1, tab convergence hole 2, support bar 3, U-shaped notch 4, trapezoidal groove 5, wedge-shaped support bar 6, fixing screw hole 7, and positioning pin 8.

[0025] The frame 1 is the main structure of the tab support, adopting a one-piece frame structure. It is fixed to the PCB sampling board via fixing screw holes 7. The main body of the support has a recessed inverted isosceles trapezoidal groove in the middle along its length. Along the length of the main body, tab gathering holes 2 are provided according to the arrangement of the battery cells. Along the width, there are positive and negative tab gathering holes. The tab gathering holes 2 have an oblong shape, with a length 1.2 to 1.3 times the length of the tab bundle and a width 2.5 to 3 times the width of the tab bundle, leaving space on both sides of the tab bundle. This increases the efficiency of tab bundle connection while preventing wear on the tab bundle from the support, thus improving the overall electrical safety of the battery pack. The bottom of the tab gathering holes 2 has chamfered and rounded structures in sequence, forming a figure-eight-shaped tab guide structure to prevent the tab bundle from scratching the tabs when passing through the tab gathering holes 2.

[0026] V-shaped and W-shaped support strips are alternately arranged between adjacent tab convergence holes 2 from left to right along the width direction of the main body. The internal structure of the support strip 3 is a shell structure, which reduces the overall weight of the bracket and improves the overall energy density of the battery pack. Adjacent support strips 3 are used to separate the tab bundles and fix the battery cells by abutting them at the bottom. Fixing screw holes 7 are provided at different positions inside, which can be fixed to the external battery input or output busbars and the upper PCB sampling board of the bracket, increasing the electrical safety and structural stability of the battery pack. Both types of support strips 3 have a rounded structure at the bottom, which prevents scratching the aluminum-plastic film of the battery cell shell while abutting the upper surface of the cell. At the same time, the inverted V-shaped reinforcing beam in the middle of the upper surface of the W-shaped support strip is at the same height as the upper surface of the bracket, providing more placement space for the PCB sampling board and increasing the overall structural strength and stability of the battery pack.

[0027] To further strengthen the limiting and fixing of the connecting busbar, a U-shaped notch 4 is provided on the outer side of the upper W-shaped support bar in the length direction. This notch is used to provide a placement position for the temperature sampling line of the battery module. The larger size of the notch facilitates the arrangement of the temperature sampling line, which reduces the overall weight of the bracket and increases the energy density of the battery pack. At the same time, the notch can also serve as a stress relief position for the entire bracket, thereby improving the structural strength of the bracket.

[0028] An inverted isosceles trapezoidal groove 5 is provided in the middle of the length direction of the bracket. The length of the lower base of the trapezoidal groove 5 is twice the length of the upper base, which increases the overall stability of the bracket. Fixing columns are provided inside the left and right ends of the trapezoidal groove 5, and fixing screw holes 7 are provided on them. The height of the fixing columns and fixing screw holes 7 are consistent with the height of the bracket, which can better distribute the stress of the bracket. The bottom further strengthens the fixation of the cell assembly. The upper part provides more support surface for the PCB board while fixing the PCB sampling board, thereby improving the structural stability and electrical safety of the battery module.

[0029] The bracket has wedge-shaped support bars 6 at both ends along its length, which, together with the support bars 3, serve to fix the top of the battery cell assembly on the lower surface. The end faces of the left and right wedge-shaped support bars 6 are equidistant from the sides of the bracket, ensuring a consistent structure on the outer edge of the bracket. The roots of the left and right wedge-shaped support bars 6 are equidistant from the roots of the left V-shaped support bar 3 and the right W-shaped support bar 3, respectively. This ensures the overall lightweight design of the bracket while preventing the battery cell tabs at the end of the battery cell assembly from contacting the battery pack housing, thus improving the electrical safety of the battery pack. At the same time, it ensures that the center of gravity of the bracket is distributed as centrally as possible, improving the overall structural stability of the battery pack.

[0030] Two symmetrical positioning pins 8 are provided on the external battery input or output busbar positions inside the end tab convergence hole 2 of the bracket. Their height is higher than the thickness of the busbar. The positioning pins 8 further strengthen the fixation of the battery busbar by embedding them into the semi-cylindrical holes on the left and right edges of the busbar, thereby increasing the overall stability and electrical safety of the battery pack and preventing the battery pack from failing due to horizontal rotation and displacement of the busbar, which could lead to safety hazards.

[0031] This application designs a tab support for a soft-pack battery. The main body is a plate-frame integrated structure with tab convergence holes on the plate frame. The tab bundle passes through the tab convergence holes and is then welded to the battery connecting piece on the PCB sampling board on the upper part of the support, improving the overall insulation of the battery pack. V-shaped support bars and W-shaped support bars are arranged sequentially between adjacent tab convergence holes along the length direction. The support bars are shell structures, which can reduce the overall weight of the battery pack and increase the energy density of the battery pack. The support bars have fixing screw holes inside, which are fixed to the upper PCB sampling board by screw connection, and fixed to the external battery input or output busbar on the PCB sampling board, increasing the overall structural stability and electrical safety of the battery pack. The W-shaped support bar on one side of the support along the length direction has a U-shaped notch for arranging the temperature sampling harness of the battery module, which improves the overall space utilization of the battery pack, can absorb part of the stress of the support, and improve the overall strength of the battery pack. Positioning pins are provided at the positions of the external battery input or output busbars on both sides of the bracket. The battery busbars are further fixed by embedding them into the semi-cylindrical holes on the left and right edges of the busbars. This prevents the busbars from rotating and shifting during battery pack operation, which could cause battery pack failure and improves the overall insulation and electrical safety of the battery pack.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0033] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, 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 pouch battery tab holder, characterized in that, include: Plate frame (1), electrode lug convergence hole (2) and support bar (3); The board frame (1) is an integral board frame structure. Multiple fixing screw holes (7) are provided through the board frame (1). The board frame (1) is connected to the external PCB sampling board by screws through the fixing screw holes (7). The tab collection holes (2) are arranged on the plate frame (1) along the length direction of the plate frame (1), and are alternately distributed as positive tab collection holes and negative tab collection holes along the width direction of the plate frame (1). The tab bundles of the external battery cell group are inserted into the tab collection holes (2) one by one. The support bar (3) is disposed on the upper surface of the plate frame (1), and V-shaped support bars and W-shaped support bars are alternately distributed along the length direction of the plate frame (1). One support bar (3) is disposed between two adjacent tab convergence holes (2). The support bar (3) is a hollow shell structure with the fixing screw hole (7) inside. The support bar (3) is connected to the external PCB sampling board and the external battery input or output busbar screw through the fixing screw hole (7). The bottom of the support bar (3) is provided with a rounded structure. The bottom of the support bar (3) abuts against the upper surface of the external battery cell assembly to fix the external battery cell assembly.

2. The soft-pack battery tab holder according to claim 1, characterized in that, The tab receiving hole (2) is a waist-shaped hole structure; the length of the tab receiving hole (2) is 1.2 to 1.3 times the length of the tab bundle passing through it, and the width of the tab receiving hole (2) is 2.5 to 3 times the width of the tab bundle passing through it; the bottom of the tab receiving hole (2) is provided with a chamfer structure and a rounded structure in sequence, and the chamfer structure and the rounded structure together form an eight-shaped tab guide structure, which is used to guide the tab bundle to pass through the tab receiving hole (2).

3. The soft-pack battery tab holder according to claim 1, characterized in that, It also includes a U-shaped notch (4); The U-shaped notch (4) is opened on the outside of the W-shaped support strip on the upper surface of the plate frame (1), and the U-shaped notch (4) penetrates along the thickness direction of the plate frame (1) to accommodate the temperature sampling wire harness of the external battery module.

4. The soft-pack battery tab holder according to claim 1, characterized in that, It also includes trapezoidal grooves (5); The trapezoidal groove (5) is an inverted isosceles trapezoidal groove structure, which is opened in the middle of the length direction of the board frame (1); the length of the lower base of the trapezoidal groove (5) is twice the length of the upper base, and the left and right ends of the trapezoidal groove (5) are provided with fixing posts, and the fixing posts are provided with fixing screw holes (7). The height of the fixing posts is the same as the height of the board frame (1), and the fixing posts are connected to the external PCB sampling board screws through the fixing screw holes (7).

5. A soft-pack battery tab holder according to claim 1, characterized in that, It also includes wedge-shaped support strips (6); Two wedge-shaped support bars (6) are provided and symmetrically arranged at both ends of the length direction of the plate frame (1). The lower surface of the wedge-shaped support bar (6) abuts against the upper surface of the external cell assembly. The wedge-shaped support bar (6) is spaced apart from the left V-shaped support bar and the right W-shaped support bar, respectively, to separate the tabs at the end of the external cell assembly from the external battery pack housing.

6. A soft-pack battery tab holder according to claim 1, characterized in that, It also includes locating pins (8); The positioning pins (8) are provided in two and symmetrically arranged at both ends of the plate frame (1) along the length direction. The positioning pins (8) are located between the end tab convergence hole (2) and the adjacent support bar (3). The height of the positioning pins (8) is higher than the thickness of the external battery input or output busbar. The positioning pins (8) are embedded in the semi-cylindrical holes on the left and right edges of the external battery input or output busbar to limit the busbar displacement.

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