Side-out tab connecting piece

Abstract

The utility model relates to a side-out tab connecting piece which comprises a pole connecting part attached to the top surface of a battery roll core and a longitudinal part arranged along the surface, provided with a side-out tab, of the battery roll core, and the pole connecting part is fixedly connected with the longitudinal part in an L shape; the longitudinal part comprises two tab connecting pieces which are arranged in a vertically staggered manner along the height direction of the side surface of the battery roll core, and an overflowing piece which is arranged between the two tab connecting pieces and is used for connecting the two tab connecting pieces; when each tab connecting piece is fixedly connected with the adjacent side-out tab, the distance between each tab connecting piece and the battery roll core is limited through a limiting piece which can be connected with the tab connecting piece in a bending manner; the pole connecting part is fixedly connected with the adjacent tab connecting piece; according to the utility model, the use length of the side-outlet tab is reduced, the utilization rate of the internal space of the battery is improved, and the heat dissipation and exhaust functions are also realized.

Description

Technical Field

[0001] The utility model relates to a side-outlet tab connecting piece, belonging to the technical field of batteries. Background Art

[0002] Batteries, as a means of storing electrical energy, can be used to store and transport electricity generated by power plants, and are of great significance to the development of the new energy industry. Lithium-ion batteries, with their advantages such as high capacity density, high specific energy, and long cycle life, have become the battery of choice for portable electronics, electric vehicles, and energy storage, and are gaining increasing popularity.

[0003] A Chinese patent with patent announcement number CN206574809U discloses an aluminum shell battery cell structure, with tabs on both sides of the battery core, an L-shaped current collector inserted between the battery core and the tabs, and threaded electrodes arranged on the upper part of the left and right current collectors fixed by a top cover plate and an electrode column fixing piece. The tabs and current collectors on both sides are fixed and clamped by a current collector insulating piece with a groove-shaped cross-section. It is necessary to place a connecting piece between the tabs and the core. During this process, the sharp edges of the current collector insulating piece can easily damage the battery core diaphragm and the tabs, and at the same time cause waste of space inside the battery.

[0004] A Chinese patent with announcement number CN213340654U discloses a connecting plate structure and a power battery, including a pole connecting plate and a tab connecting plate; the pole connecting plate is bendably connected to the side of the tab connecting plate through a first bending section; the tab connecting plate includes a first tab connecting section and at least one second tab connecting section, and the first tab connecting section is bendably connected to the second tab connecting section through a second bending section. Although this patent solves the problem of low internal space utilization of power batteries caused by the use of soft connecting plates and long tabs in the prior art, it does not leave a gap between the tab connecting section and the battery core, which is not conducive to heat dissipation of the battery core and exhaust when the battery core undergoes a chemical reaction. Utility Model Content

[0005] In order to overcome the above problems, the utility model provides a side-outlet tab connecting piece, which reduces the usable length of the side-outlet tab and improves the utilization rate of the internal space of the battery while also having heat dissipation and exhaust functions.

[0006] The technical solution of the utility model is as follows:

[0007] A side-outlet tab connecting piece comprises a pole connecting portion arranged to fit the top surface of a battery roll core, a longitudinal portion arranged along the surface of the battery roll core provided with a side-outlet tab, the pole connecting portion and the longitudinal portion being fixedly connected in an L-shape; the longitudinal portion comprises two tab connectors staggered up and down along the height direction of the side surface of the battery roll core, and a current-passing member arranged between the two tab connectors for connecting the two; when each of the tab connectors is fixedly connected to the adjacent side-outlet tab, each tab connector is limited in spacing from the battery roll core by a limit member bendably connected thereto; the pole connecting portion is fixedly connected to the adjacent tab connector.

[0008] Furthermore, each of the limiting members includes a bending section and a limiting plate. The bending section is connected to one side of the tab connector and is arranged along its length direction. The other side of the bending section is fixedly connected to the limiting plate.

[0009] Furthermore, the bending angle range of the limiting plate and the pole tab connector connected to it is 0°-180°. When the bending angle is 0°, the limiting plate and the pole tab connector connected to it are placed on the same horizontal plane. When the bending angle is 180°, the limiting plate is placed between the pole tab connector and the battery roll core, and the bending section has an arc-shaped bending structure.

[0010] Furthermore, each of the limiting plates is provided with a plurality of convex ribs which are arranged at intervals and protrude toward the adjacent tab connectors.

[0011] Furthermore, the pole connecting portion, the tab connector, the current-passing member, and the limiting plate are all rectangular plates; and the length d1 of the current-passing member is greater than or equal to the width d2 of each tab connector.

[0012] Furthermore, the side surfaces of both ends of the battery coil core are provided with two side output tabs arranged upper and lower, the current-passing member is provided between the two side output tabs, and the two side output tabs are respectively laser welded to the adjacent tab connectors.

[0013] Furthermore, the bent section is placed on a side of the tab connector close to the side-outlet tab.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model effectively reduces the use length of the side-outlet tabs by using two tab connectors that are staggered up and down, thereby increasing the heat dissipation area of ​​the battery core. At the same time, the distance between the tab connector and the battery core is limited by a limiting member placed between the tab connector and the battery core to prevent the two from being pressed together under force, which would affect the heat dissipation and exhaust of the battery core.

[0016] 2. The limiting plate in the limiting member of the present invention can be bendably connected to the adjacent tab connector through a bending section. By changing the bending angle of the limiting plate and the tab connector, the present invention is easy to stack and store when not in use. During use, the distance between the tab connector and the battery roll core is limited, and the risk of the side tab being cut by the sharp edge of the tab connector is reduced by the curved bending section at this time.

[0017] 3. The utility model uses the raised ribs on the limiting plate to retain the heat dissipation and exhaust channels of the battery core when the limiting plate is partially in contact with the tab connector and the battery core, thereby effectively improving the cycle performance and safety performance of the battery core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the connection between the utility model and the battery coil core.

[0019] Figure 2 It is a structural diagram of the longitudinal part.

[0020] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0021] The reference numerals in the figures are as follows:

[0022] 1. Battery core; 11. Side tab; 2. Pole connection; 3. Longitudinal portion; 31. Tab connector; 32. Current-carrying component; 4. Limiting component; 41. Bending section; 42. Limiting plate; 43. Raised rib. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] See also Figure 1-3, a side-outlet tab connecting piece, comprising a pole connecting portion 2 arranged in contact with the top surface of a battery core 1, a longitudinal portion 3 arranged along the surface of the battery core 1 provided with a side-outlet tab 11, the pole connecting portion 2 and the longitudinal portion 3 are fixedly connected in an L-shape; wherein the longitudinal portion 3 comprises two tab connectors 31 staggered up and down along the height direction of the side of the battery core 1, and a current-passing member 32 arranged between the two tab connectors 31 for connecting the two. By cooperating with the tab connector 31, the use length of the side-outlet tab 11 can be reduced. For example, the tabs 11 on both sides of the battery core 1 on the same side can be arranged up and down to be laser welded with the adjacent tab connectors 31. When the current-passing member 32 is placed between the two side tabs 11, the pole connecting portion 2 is fixedly connected to the adjacent tab connector 31; when the tab connector 31 is placed in contact with the side of the battery roll core 1, the side tab 11 is bent and guided to be in contact with the surface of the adjacent tab connector 31 away from the battery roll core 1. That is, at this time, the tab connector 31 has been placed between the side tab 11 and the battery roll core 1, which facilitates the laser welding of the side tab 11 and the tab connector 31, simplifies the setting process of the tab connector 31, and prevents the edge of the tab connector 31 from damaging the diaphragm and tab of the battery roll core 1, and causing space waste. Each tab connector 31 can be bent and connected to the limiting member 4. When the tab connector 31 is fixedly connected to the adjacent side tab 11, the limiting member 4 limits the distance between the tab connector 31 and the battery roll core 1.

[0025] Furthermore, the limiting member 4 includes a bending section 41 and a limiting plate 42. The bending section 41 is fixedly connected to the side of the tab connector 31 close to the adjacent side tab 11. The other end of the bending section 41 is fixedly connected to the limiting plate 42. The limiting plate 42 is bent and connected to the tab connector 31 through the bending section 41, and the bending angle range of the limiting plate 42 is 0°-180°. When the bending angle is 0°, the limiting plate 42 and the tab connector 31 are placed on the same horizontal plane for easy stacking and storage. When the tab connector 31 is in contact with the side of the battery roll core 1, the bending angle of the limiting plate 42 is adjusted to 180°. At this time, the limiting plate 42 It is placed between the tab connector 31 and the battery roll core 1, thereby limiting the distance between the tab connector 31 and the battery roll core 1 and preventing the two from fitting together. At this time, the bending section 41 is an arc-shaped bending structure, which is also convenient for guiding the adjacent side tabs 11 to bend and fit toward the surface of the tab connector 31 away from the battery roll core 1, and then the side tabs 11 and the tab connector 31 are laser welded, reducing the risk of the side tabs 11 being cut off by the sharp edge of the tab connector 31, and at the same time reducing the risk of the welding point between the side tabs 11 and the tab connector 31 being torn due to vibration during transportation, thereby maintaining the performance of the battery roll core 1.

[0026] Furthermore, each limiting plate 42 is provided with a number of ribs 43 that are spaced apart and raised toward the adjacent tab connector 31, and the number of ribs 43 is ≥2; during transportation, since the two tab connectors 31 are staggered up and down, they do not completely cover the side of the battery core 1, thereby increasing the heat dissipation area of ​​the battery core 1. Even if part of the limiting plate 42 is caused to fit with the adjacent tab connector 31 and the battery core 1 due to vibration, the ribs 43 can still ensure that there are exhaust and heat dissipation channels between the tab connector 31, the limiting plate 42 and the battery core 1, thereby improving the cycle performance of the battery core 1 and preventing the battery core 1 from generating a large amount of gas that cannot be discharged due to thermal runaway and other reasons, thereby affecting the safety performance of the battery core 1.

[0027] Furthermore, the pole connecting portion 2 , the tab connector 31 , the limiting plate 42 , and the flow member 32 may all be rectangular plates. To ensure the flow capacity of the flow member 32 , the length d1 of the flow member 32 should be ≥ the width d2 of each tab connector 31 .

[0028] Furthermore, the fixed connection between the pole connecting portion 2 and the adjacent tab connector 31, between the two tab connectors 31 and the current-passing member 32, and between the tab connector 31 and the adjacent bent end and the limiting plate 42 can be welded or integrally formed.

[0029] The working principle of this utility model:

[0030] See also Figure 1-3 Both sides of the battery core 1 are provided with side tabs 11 arranged adjacent to each other in the upper and lower directions. The surface of the battery core 1 provided with the side tabs 11 is arranged so that the pole connecting portion 2 is arranged in contact with the top of the battery core 1. At this time, the longitudinal portion 3 is in contact with the side of the battery core 1. At the same time, the limiting plates 42 on the two tab connectors 31 are bent 180° and placed between the tab connector 31 and the side of the battery core 1.

[0031] The side tab 11 is bent toward the surface of the adjacent tab connector 31 away from the battery roll core 1 under the guidance of the arc surface of the bending section 41 until it fits together, and then the side tab 11 and the tab connector 31 are laser welded to fix the two together.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A side-outlet tab connecting piece, comprising a pole connecting portion (2) arranged to fit the top surface of a battery coil (1), a longitudinal portion (3) arranged along the surface of the battery coil (1) on which the side-outlet tab (11) is provided, the pole connecting portion (2) and the longitudinal portion (3) being fixedly connected in an L-shape; characterized in that: The longitudinal portion (3) comprises two tab connectors (31) staggered in the vertical direction along the side height of the battery coil core (1), and a current-passing member (32) arranged between the two tab connectors (31) for connecting the two. When each tab connector (31) is fixedly connected to the adjacent side tab (11), each tab connector (31) is limited in distance from the battery coil core (1) by a limiting member (4) bendably connected thereto. The pole column connecting portion (2) is fixedly connected to the adjacent tab connector (31).

2. The side-outlet tab connector according to claim 1, characterized in that: Each of the limiting members (4) comprises a bending section (41) and a limiting plate (42); the bending section (41) is connected to one side of the tab connector (31) and is arranged along its length direction; the other side of the bending section (41) is fixedly connected to the limiting plate (42).

3. The side-outlet tab connector according to claim 2, characterized in that: The bending angle range of the limiting plate (42) and the tab connector (31) connected thereto is 0°-180°. When the bending angle is 0°, the limiting plate (42) and the tab connector (31) connected thereto are placed on the same horizontal plane. When the bending angle is 180°, the limiting plate (42) is placed between the tab connector (31) and the battery coil core (1), and the bending section (41) presents an arc-shaped curved structure.

4. The side-outlet tab connector according to claim 3, characterized in that: Each of the limiting plates (42) is provided with a plurality of convex ribs (43) that are spaced apart and protrude toward the adjacent tab connector (31).

5. The side-outlet tab connecting piece according to claim 4, characterized in that: The pole connecting portion (2), the tab connector (31), the current-passing member (32), and the limiting plate (42) are all rectangular plates; the length d1 of the current-passing member (32) is greater than or equal to the width d2 of each tab connector (31).

6. The side-outlet tab connector according to claim 1 or 5, characterized in that: The battery coil core (1) is provided with two side output tabs (11) arranged vertically on both ends of the side surface, the current-passing member (32) is provided between the two side output tabs (11), and the two side output tabs (11) are laser-welded to the adjacent tab connectors (31) respectively.

7. The side-outlet tab connector according to claim 5, characterized in that: The bent section (41) is placed on a side of the tab connector (31) close to the side-outlet tab (11).

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