A battery structure

Abstract

The utility model discloses a battery structure, include: shell, BMS board and connecting piece, BMS board is fixed in the shell, and BMS board is set up with the hole position, and the hole position is located the edge of BMS board near the negative pole side of battery, connecting piece includes first connecting piece and second connecting piece, and first connecting piece includes first connecting part and first confluence part, and first confluence part sets up with the first connecting hole, and first confluence part is connected with the negative pole of battery, and one end of first connecting part passes through the hole position and is welded with BMS board, and the other end of connecting piece is connected with first confluence part. The utility model has solved the problem that BMS board and battery cell connection occupy larger internal space in the prior art, which is not conducive to improving the overall utilization of battery, and the stability of connection is poor, the utility model has saved the internal space of battery greatly, has improved the utilization of battery internal space, has realized higher integration of battery structure, and has further improved the stability of BMS board and cell connection.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically a battery structure. Background Technology

[0002] In battery structure design, with the increasing demands for miniaturization and high integration, internal space utilization has become a core design indicator. The connection structure layout between the BMS board (Battery Management System board) and the battery cells is one of the key factors affecting space utilization. In existing technologies, the connection between the BMS board and the positive and negative terminals of the battery often uses wires or integrated busbars. Using wires requires a certain amount of redundant length to accommodate assembly errors, and the wire routing must avoid other components, easily leading to cluttered internal space and increasing the overall battery volume. Existing integrated busbar connections to the BMS board are mostly located in the middle of the board or far from the edge. To facilitate soldering operations, a large assembly operation space needs to be reserved around the BMS board, further encroaching on the limited internal space and hindering efficient use of the overall battery space. Furthermore, wire connections are prone to detachment or breakage due to vibration and assembly stress, leading to poor circuit contact and affecting the BMS board's monitoring and protection functions for the battery status.

[0003] Therefore, there is an urgent need for an innovative solution that can improve the utilization rate of the internal space of the battery, provide more space for the compact design of the battery, and realize a battery structure with higher integration. Utility Model Content

[0004] This invention proposes a battery structure to solve the problems mentioned in the background art.

[0005] The purpose of this utility model is to provide the following technical solution: a battery structure, including: a shell, a BMS board, and a connecting piece, wherein the BMS board is fixed inside the shell, and the BMS board has a hole located on the edge of the BMS board near the negative electrode of the battery; the connecting piece includes a first connecting piece and a second connecting piece, the first connecting piece including a first connecting portion and a first busbar portion, the first busbar portion having a first connecting hole, the first busbar portion being connected to the negative electrode of the battery, one end of the first connecting portion passing through the hole and being welded to the BMS board, and the other end of the first connecting portion being connected to the first busbar portion.

[0006] Furthermore, the second connecting piece includes a second connecting portion and a second busbar portion, the second connecting portion and the second busbar portion having the same shape as the first connecting portion and the first busbar portion, and the second busbar portion being connected to the positive terminal of the battery.

[0007] Furthermore, the outer shell includes an upper shell and a lower shell. The upper shell is a hollow shell structure, and the lower shell is a hollow box structure that mates with the upper shell. The upper shell has a first screw hole located on the surface of the upper shell that contacts the lower shell. The lower shell has a second screw hole located on the surface of the lower shell that contacts the upper shell. The positions of the first screw hole and the second screw hole correspond to each other.

[0008] Furthermore, the lower housing and the upper housing have grooves around their contact surfaces, and sealant is embedded in the grooves to seal the connection between the upper housing and the lower housing.

[0009] Furthermore, the lower housing is equipped with a switch button and an indicator light.

[0010] Furthermore, the lower housing is provided with a charging hole and a connection terminal. The charging hole is located on the side of the lower housing, and the connection terminal is located on the bottom of the lower housing.

[0011] Furthermore, a handle is provided at the bottom of the lower housing. The handle includes two fixing parts and an elastic band. The fixing parts are fixedly installed on the lower housing by screws, and the fixing parts are distributed on both sides of the lower housing. The elastic band is fixedly installed on the fixing parts.

[0012] Furthermore, it also includes an insulating sheet, which is attached to the surface of the BMS board.

[0013] Furthermore, the BMS board has positioning holes for positioning wires.

[0014] Furthermore, the first connecting portion is a bent rectangular sheet structure, and the first confluence portion is a sheet structure.

[0015] The above technical solution produces the following technical effects:

[0016] 1) This invention positions the holes of the BMS board on the edge near the negative electrode of the battery, allowing the first connecting part of the first connecting piece to directly pass through the holes for welding to the BMS board, eliminating the need to reserve operating space in the middle of the board or far from the edge. Simultaneously, the functional connection between the first connecting part and the first busbar shortens the overall extension path of the busbar, enabling it to fit more closely to the internal structure of the battery. This invention significantly saves internal battery space, improves the utilization rate of internal battery space, and achieves a higher degree of integration in the battery structure.

[0017] 2) This utility model sets the hole position on the edge near the negative electrode of the battery and adopts a segmented structure of the first connecting piece, which makes the connection path of the connecting piece shorter, reduces the shaking of the connecting piece caused by external forces, such as assembly impact and equipment vibration, further improves the connection stability, solves the problem of poor stability in the existing connection method, realizes a stable electrical connection between the BMS board and the negative electrode of the battery, and improves the vibration resistance and durability of the connection structure. Attached Figure Description

[0018] Figure 1 This is a front view of a battery structure according to the present invention;

[0019] Figure 2 This is an assembly drawing of the lower housing 12 of a battery structure according to the present invention;

[0020] Figure 3 This is an exploded view of a battery structure according to the present invention;

[0021] Figure 4 This is a partially enlarged view of the first connecting piece 31 of this utility model;

[0022] In the picture:

[0023] 1 – Outer casing; 2 – BMS board; 3 – Connecting piece; 4 – Insulating piece;

[0024] 11 – Upper housing; 12 – Lower housing; 21 – Hole; 22 – Positioning hole; 31 – First connecting piece; 32 – Second connecting piece;

[0025] 111 – First screw hole; 121 – Second screw hole; 122 – Groove; 123 – Switch button; 124 – Indicator light; 125 – Charging port; 126 – Connecting terminal; 127 – Handle; 311 – First connecting part; 312 – First busbar; 321 – Second connecting part; 322 – Second busbar; 1271 – Fixing part; 1272 – Elastic band. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It is known that existing battery structure designs have some technical defects. Traditional BMS boards are often connected to the positive and negative terminals of the battery using wires or integrated busbars. Wire connections require a certain length of redundant wire to accommodate assembly errors, and the wire routing must avoid other components, easily leading to cluttered internal space and increasing the overall battery volume. Existing integrated busbar connections to the BMS board are mostly located in the middle of the board or far from the edge. To facilitate soldering, a large assembly space needs to be reserved around the BMS board, further encroaching on the limited internal space and hindering efficient use of the overall battery space. Furthermore, wire connections are prone to detachment or breakage due to vibration and assembly stress, leading to poor circuit contact and affecting the BMS board's monitoring and protection functions for the battery status.

[0028] Therefore, this application is motivated by the inventive motivation to improve existing omnidirectional tab covers. The following detailed explanation of a cover assembly and battery for an omnidirectional tab battery according to specific embodiments is provided.

[0029] like Figure 1-4 As shown, this application provides a battery structure, including: a housing 1, a BMS board 2, and a connecting piece 3. The BMS board 2 is fixed inside the housing 1, and the BMS board 2 has a hole 21 located on the edge of the BMS board 2 near the bottom. It also includes an insulating sheet 4, which adheres to the surface of the BMS board 2 to effectively prevent conductive components on the BMS board 2, such as solder joints, copper foil, and electronic component pins, from accidentally contacting other metal components inside the battery, such as the housing 1, connecting piece 3, and battery cells, due to vibration, assembly deviation, or component deformation. This physically blocks short-circuit paths and ensures battery circuit safety. Preferably, the BMS board 2 has positioning holes 22 for positioning wires. The positioning holes 22 provide a clear path for the wires inside the battery to pass through and be fixed, allowing the wires to be arranged according to a preset path, avoiding wire crossing and tangling, reducing friction and wear between wires, and ensuring the long-term stability of the circuit connection.

[0030] Furthermore, the connecting piece 3 includes a first connecting piece 31 and a second connecting piece 32. The first connecting piece 31 includes a first connecting portion 311 and a first busbar portion 312. The first connecting portion 311 is a bent rectangular sheet structure, and the first busbar portion 312 is a sheet structure. The first busbar portion 312 has a first connecting hole and is connected to the negative terminal of the battery. One end of the first connecting portion passes through the hole 21 and is soldered to the BMS board 2, and the other end of the first connecting portion 311 is connected to the first busbar portion 312. Furthermore, the second connecting piece 32 includes a second connecting portion 321 and a second busbar portion 322. The shapes of the second connecting portion 321 and the second busbar portion 322 are the same as those of the first connecting portion 311 and the first busbar portion 312. The second busbar portion 322 is connected to the positive terminal of the battery. The holes 21 of the BMS board 2 are located on the edge near the negative terminal of the battery. The bent connecting part 311 passes through the holes 21 and is then welded, so that the connecting piece 3 can be arranged compactly along the inner edge of the outer shell 1, reducing the space occupied in the middle of the BMS board 2 and the core area of ​​the battery. The first connecting piece 31 and the second connecting piece 32 adopt the same shape design, which facilitates symmetrical or parallel layout, further reducing the overall space ratio of the positive and negative terminal connection structure, reserving more installation space for core components such as battery cells, and facilitating the further integration of the battery.

[0031] Furthermore, the outer casing 1 includes an upper casing 11 and a lower casing 12. The upper casing 11 is a hollow shell structure, and the lower casing 12 is a hollow box structure that mates with the upper casing 11. The upper casing has a first screw hole 111, which is located on the surface where the upper casing 11 and the lower casing 12 contact each other. The lower casing 12 has a second screw hole 121, which is located on the surface where the lower casing 12 and the upper casing 11 contact each other. The positions of the first screw hole 111 and the second screw hole 121 correspond to each other. Grooves 122 are provided around the perimeter of the contact surface between the lower casing 12 and the upper casing 11. Sealant is embedded in the grooves 122, and the upper casing 11 and the lower casing 12 are sealed together. When the upper casing 11 and the lower casing 12 are fastened with screws, the sealant is compressed and fills the tiny gaps in the contact surface of the casing, forming a continuous and tight sealing interface. This design effectively prevents external moisture, dust, liquids and other impurities from entering the battery, effectively solving the problem of gaps that may exist in simple screw connections, and further ensuring the electrical performance and service life of components such as the BMS board and battery cells.

[0032] Preferably, the lower housing 12 is equipped with a switch button 123 and an indicator light 124. The switch button 123 can quickly control the battery's on / off state, making operation simple. The indicator light 124 can provide real-time feedback on the battery status, increasing ease of use. The lower housing 12 is also provided with a charging port 125 and a connection terminal 126. The charging port 125 is located on the side of the lower housing 12, conforming to the user's conventional operating habits of plugging and unplugging the charging plug. The connection terminal 126 is located at the bottom of the lower housing 12 for connecting the battery to external devices. This design can reduce the risk of loosening or detachment of the connection due to accidental contact during daily operation, and at the same time, it will not cause mutual interference between the connection terminal 126 and the charging port 125, reducing the risk of misoperation.

[0033] Preferably, a carrying handle 127 is provided at the bottom of the lower housing 12. The carrying handle 127 includes two fixing parts 1271 and an elastic band 1272. The fixing parts 1271 are fixedly installed on the lower housing 12 by screws, and the fixing parts 1271 are distributed on both sides of the lower housing 12. The elastic band 1272 is fixedly installed on the fixing parts 1271. The user can easily lift the battery by grasping the elastic band without the need for other tools, greatly reducing the difficulty of manual handling. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery structure, characterized in that, include: The shell (1), BMS board (2) and connecting piece (3) are provided. The BMS board (2) is fixed inside the shell (1). The BMS board (2) has a hole (21) located on the edge of the BMS board (2) near the negative electrode of the battery. The connecting piece (3) includes a first connecting piece (31) and a second connecting piece (32). The first connecting piece (31) includes a first connecting part (311) and a first busbar (312). The first busbar (312) has a first connecting hole. The first busbar (312) is connected to the negative terminal of the battery. One end of the first connecting part passes through the hole (21) and is welded to the BMS board (2). The other end of the first connecting part (311) is connected to the first busbar (312).

2. The battery structure according to claim 1, characterized in that, The second connecting piece (32) includes a second connecting part (321) and a second busbar (322). The shapes of the second connecting part (321) and the second busbar (322) are the same as those of the first connecting part (311) and the first busbar (312). The second busbar (322) is connected to the positive terminal of the battery.

3. The battery structure according to claim 1, characterized in that, The outer shell (1) includes an upper shell (11) and a lower shell (12). The upper shell (11) is a hollow shell structure, and the lower shell (12) is a hollow box structure that cooperates with the upper shell (11). The upper shell has a first screw hole (111) located on the surface of the upper shell (11) that contacts the lower shell (12). The lower shell (12) has a second screw hole (121) located on the surface of the lower shell (12) that contacts the upper shell (11). The positions of the first screw hole (111) and the second screw hole (121) correspond to each other.

4. A battery structure according to claim 3, characterized in that, The lower housing (12) and the upper housing (11) have grooves (122) around their contact surfaces, and sealant is embedded in the grooves (122) to seal the connection between the upper housing (11) and the lower housing (12).

5. A battery structure according to claim 3, characterized in that, The lower housing (12) is equipped with a switch button (123) and an indicator light (124).

6. A battery structure according to claim 3, characterized in that, The lower housing (12) is provided with a charging hole (125) and a connection terminal (126). The charging hole (125) is located on the side of the lower housing (12), and the connection terminal (126) is located on the bottom of the lower housing (12).

7. A battery structure according to claim 3, characterized in that, The bottom of the lower housing (12) is provided with a carrying handle (127). The carrying handle (127) includes two fixing parts (1271) and an elastic band (1272). The fixing parts (1271) are fixedly installed on the lower housing (12) by screws, and the fixing parts (1271) are distributed on both sides of the lower housing (12). The elastic band (1272) is fixedly installed on the fixing parts (1271).

8. A battery structure according to claim 1, characterized in that, It also includes an insulating sheet (4) which is attached to the surface of the BMS board (2).

9. A battery structure according to claim 1, characterized in that, The BMS board (2) has positioning holes (22) for positioning wires.

10. A battery structure according to claim 1, characterized in that, The first connecting part (311) is a bent rectangular sheet structure, and the first confluence part (312) is a sheet structure.

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