Battery stop frame and lithium ion battery

Abstract

The utility model discloses a battery stop frame and lithium ion battery relates to battery technical field. Specifically including frame body, installation department, heat dissipation and pole lug groove, frame body has the cavity of one side open's cuboid, installation department sets up in one side of frame body for connecting the volume core, the heat dissipation hole is through one end or both ends of frame body, and the cuboid cavity is communicated with the outside, and the pole lug groove is seted up in installation department. The electrolyte flows from the cuboid cavity of frame body to the volume core, and the heat dissipation hole of frame body end portion is communicated with the outside, makes the electrolyte when injecting, can timely discharge the gas of cuboid cavity, improves the diffusion efficiency of electrolyte, and when the volume core generates heat, the heat evenly radiated to the cuboid cavity in its inside can radiate to the outside from the heat dissipation hole of cuboid cavity end portion, so as to avoid the problem of heat accumulation.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery stop bracket and a lithium-ion battery. Background Technology

[0002] A battery retainer, also known as a battery insulation retainer, is a component located between the battery top cover and the battery cell or winding core, typically made of insulating material. It clamps the tab connecting piece of the battery cell casing into the tab groove, fixing it inside the battery housing. This serves to secure the battery cell, prevent short circuits between the cell and the metal casing, and limit the cell's movement within the housing, thereby improving battery safety and stability.

[0003] In existing technologies, battery retaining frames employ a four-sided enclosed structure, resulting in a relatively independent and narrow internal space. This leads to slow diffusion of the electrolyte within the battery, making it difficult for the electrolyte to quickly reach all corners, especially at the edges and corners of the retaining frame. Furthermore, the enclosed structure hinders the uniform diffusion of gas. Gas rapidly accumulates in localized areas within the battery, causing a rapid increase in pressure in those areas, preventing timely diffusion to other regions.

[0004] Therefore, this application aims to solve the problem of slow electrolyte diffusion at the battery stop bracket, which also leads to heat accumulation. Utility Model Content

[0005] The main purpose of this invention is to provide a battery stop bracket and a lithium-ion battery, which aims to improve the electrolyte diffusion rate at the stop bracket and enhance its heat dissipation capacity.

[0006] To achieve the above objectives, this utility model proposes a battery stop bracket, comprising:

[0007] The frame has a rectangular cavity with one open side;

[0008] The mounting section is located on one side of the frame and is used to connect the winding core;

[0009] Ventilation holes, extending through one or both ends of the frame, connect the cuboid cavity to the outside; and

[0010] The tab groove is formed in the mounting part.

[0011] In the above scheme, the heat dissipation holes are opened at the ends of the frame, so that the rectangular cavity of the frame is connected to the outside. This helps to dissipate heat from the core, and at the same time, when the electrolyte is injected, the gas in the stop frame can be discharged outward, which helps to increase the flow rate of the electrolyte in the rectangular cavity. The tab groove is opened at the mounting part, preferably in the middle of the mounting part, so that the core can restrict the position of the tab from the tab groove.

[0012] Furthermore, the mounting section is provided with multiple guide holes.

[0013] Furthermore, the guide holes are symmetrically arranged on both sides of the tab groove. This symmetrical arrangement ensures that the electrolyte can flow into different corners of the winding core, improving the efficiency of electrolyte inflow.

[0014] Furthermore, partitions are provided at both ends of the cuboid cavity of the frame, and the heat dissipation holes penetrate the partitions and the ends of the frame. The partitions can block the electrolyte to prevent it from flowing out of the cuboid cavity.

[0015] Furthermore, the heat dissipation holes at the end of the frame are coaxially arranged with the corresponding heat dissipation holes on the partition. This allows heat or gas emitted by the core to flow out through the corresponding heat dissipation holes, improving the efficiency of heat and gas dissipation and preventing gas from being blocked between the partition and the end of the frame.

[0016] Furthermore, the heat dissipation holes at the ends of the frame are staggered with the heat dissipation holes on the corresponding partitions. By overlapping, the staggered heat dissipation holes can form convection channels, making it easier for hot air inside the core to rise and be discharged, while allowing cooler external air to smoothly enter and replenish it, thereby accelerating airflow and effectively improving heat dissipation efficiency.

[0017] Furthermore, the mounting portion is a recessed groove formed in the frame.

[0018] Furthermore, the inner wall of the rectangular cavity of the frame is provided with stiffening plates.

[0019] This application also discloses a lithium-ion battery, including a core, with a positive electrode cover and a negative electrode cover respectively disposed on both sides of the core, and a battery stop frame as described above connecting the positive electrode cover and the core.

[0020] Furthermore, the positive electrode cover is connected in the middle to the tab of the winding core, and an injection hole is provided at the end of the positive electrode cover. The middle part of the positive electrode cover is connected to the tab of the winding core, and its side is used to open the injection hole to avoid the tab and facilitate the injection of electrolyte into the winding core. An aluminum shell is installed on the outside of the winding core to facilitate integrated installation with the battery stop frame and the positive electrode cover to form a lithium-ion battery.

[0021] The above technical solution has the following advantages:

[0022] This application provides a heat dissipation hole at one or both ends of the frame. The electrolyte flows from the rectangular cavity of the frame to the core. The heat dissipation hole at the end of the frame is connected to the outside, so that the gas in the rectangular cavity can be discharged in time when the electrolyte is injected, thereby improving the diffusion efficiency of the electrolyte. At the same time, when the core heats up, the heat emitted from its interior can be evenly distributed to the rectangular cavity and dissipated outward from the heat dissipation hole at the end of the rectangular cavity, thus avoiding the problem of heat accumulation. Attached Figure Description

[0023] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a front structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model;

[0026] Figure 3 This is an assembly diagram of the present invention and the battery.

[0027] In the diagram: 1. Frame; 2. Mounting section; 3. Drainage hole; 4. Rib plate; 5. Electrode lug groove; 6. Heat dissipation hole; 7. Negative electrode cover plate; 8. Positive electrode cover plate; 9. Injection hole; 10. Core; 11. Partition plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0029] like Figure 1 and Figure 2As shown, a battery stop bracket includes a frame body 1, a mounting part 2, a heat dissipation hole 6, and a tab groove 5. The frame body 1 has a rectangular cavity with one open side. The mounting part 2 is disposed on one side of the frame body 1 and is used to connect the winding core 10. The heat dissipation hole 6 passes through one or both ends of the frame body 1, connecting the rectangular cavity to the outside. The tab groove 5 is formed in the mounting part 2. The frame 1 is installed between the battery cover and the core 10, serving to fix the core 10, prevent the core 10 from short-circuiting with the metal casing, and limit the movement of the core 10 within the casing. The frame 1 is connected to the core 10 via the mounting part 2, thus acting as a stop for the positive or negative side of the core 10, preferably as a stop for the positive side of the core 10. The heat dissipation hole 6 is opened at the end of the frame 1, allowing the cuboid cavity of the frame 1 to communicate with the outside. This helps to dissipate heat from the core 10 and also allows the gas inside the stop to be discharged when electrolyte is injected, which helps to increase the flow rate of the electrolyte in the cuboid cavity. The tab groove 5 is opened at the mounting part 2, preferably in the middle of the mounting part 2, so that the core 10 can restrict the position of the tab from the tab groove 5.

[0030] like Figure 2 As shown, the mounting part 2 has multiple guide holes 3. The guide holes 3 are located at the bottom of the cuboid cavity. The injected electrolyte can flow into the core 10 through the guide holes 3. Preferably, the guide holes 3 are symmetrically arranged on both sides of the tab groove 5 to ensure that the electrolyte can flow into different corners of the core 10 and improve the efficiency of the electrode liquid flow.

[0031] like Figure 2 As shown, the heat dissipation hole 6 can be set at one end of the cuboid cavity, preferably at both ends of the cuboid cavity. The two ends of the cuboid cavity of the frame 1 are provided with partitions 11. The heat dissipation hole 6 passes through the partitions 11 and the ends of the frame 1. The partitions 11 can block the electrolyte to prevent the electrolyte from flowing out of the cuboid cavity.

[0032] As one embodiment of this application, the heat dissipation hole 6 at the end of the frame 1 is coaxially arranged with the heat dissipation hole 6 of the corresponding partition 11. The heat dissipation hole 6 of the frame 1 and the heat dissipation hole 6 of the partition 11 are opposite each other. When the heat or gas emitted by the core 10 can flow out from the opposite heat dissipation hole 6, the heat and gas dissipation efficiency is improved, so as to prevent the gas from being blocked between the partition 11 and the end of the frame 1.

[0033] In one embodiment of this application, the heat dissipation holes 6 at the end of the frame 1 are staggered with the heat dissipation holes 6 of the corresponding partition 11. In this embodiment, the heat dissipation holes 6 of the frame 1 and the heat dissipation holes 6 of the partition 11 are staggered with each other, either vertically or horizontally, or partially overlapping in the axial direction. By overlapping, the staggered heat dissipation holes 6 can form a convection channel, making it easier for the hot air inside the core 10 to rise and be discharged, while the cooler air outside can smoothly enter to replenish it, thereby accelerating the airflow and effectively improving the heat dissipation efficiency.

[0034] like Figure 1 As shown, the mounting part 2 is a groove opened in the frame 1. The core 10 is installed by conforming to the frame 1 through the groove, which improves the connection stability between the two. The guide holes 3 are all opened in the groove to ensure that the electrode liquid can flow from the guide holes 3 to the core 10.

[0035] like Figure 2 As shown, the inner wall of the cuboid cavity of the frame 1 is provided with stiffening plates 4. The stiffening plates 4 can enhance the structural stability between the frame 1 and the mounting part 2, and ensure that the mounting part 2 can fit more tightly with the core 10, so as to prevent the mounting part 2 from deforming.

[0036] like Figure 3 As shown, a lithium-ion battery includes a core 10. A positive electrode cover plate 8 and a negative electrode cover plate 7 are respectively provided on both sides of the core 10. The positive electrode cover plate 8 and the core 10 are connected by the aforementioned battery stop frame and are fixed by heat sealing with Mylar film. The battery stop frame is independently installed on the core 10. The negative electrode cover plate 7 can be the battery stop frame of this application, or different types of stop frames can be selected as needed.

[0037] like Figure 3 As shown, the middle part of the positive electrode cover plate 8 is connected to the tab of the core 10. The end of the positive electrode cover plate 8 is provided with an injection hole 9. The middle part of the positive electrode cover plate 8 is connected to the tab of the core 10, and its side is used to open the injection hole 9 to avoid the tab and facilitate the injection of electrolyte into the core 10. The core 10 is fitted with an aluminum shell to facilitate the integrated installation with the battery stop frame and the positive electrode cover plate 8 to form a lithium-ion battery.

[0038] When the lithium battery is filled with electrolyte, the electrolyte enters the core 10 through the filling hole 9 and can be quickly distributed to the entire cuboid cavity through the guide hole 3 of the frame 1. When the lithium battery generates a large amount of gas and heat unexpectedly, the gas can also diffuse to the periphery of the cuboid cavity through the guide hole 3, which is conducive to the uniform distribution of gas so that it can be broken from the explosion-proof valve of the positive electrode cover plate 8.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery stop bracket, characterized in that, include: The frame (1) has a rectangular cavity with one open side; The mounting part (2) is provided on one side of the frame (1) and is used to connect the core (10); Heat dissipation holes (6) extend through one or both ends of the frame (1), connecting the cuboid cavity to the outside; and The tab groove (5) is provided in the mounting part (2).

2. The battery stop bracket as described in claim 1, characterized in that, The mounting part (2) has multiple guide holes (3).

3. The battery stop bracket as described in claim 2, characterized in that, The guide holes (3) are symmetrically arranged on both sides of the tab groove (5).

4. The battery stop bracket as described in claim 1, characterized in that, The rectangular cavity of the frame (1) is provided with partitions (11) at both ends, and the heat dissipation hole (6) passes through the partitions (11) and the end of the frame (1).

5. The battery stop bracket as described in claim 4, characterized in that, The heat dissipation hole (6) at the end of the frame (1) is coaxially arranged with the heat dissipation hole (6) of the corresponding partition (11).

6. The battery stop bracket as described in claim 4, characterized in that, The heat dissipation holes (6) at the end of the frame (1) are staggered with the heat dissipation holes (6) of the corresponding partition (11).

7. The battery stop bracket as described in claim 1, characterized in that, The mounting part (2) is a groove formed in the frame (1).

8. The battery stop bracket as described in claim 1, characterized in that, The inner wall of the rectangular cavity of the frame (1) is provided with stiffening plates (4).

9. A lithium-ion battery, characterized in that, The device includes a core (10), on both sides of which a positive electrode cover plate (8) and a negative electrode cover plate (7) are respectively provided, and a battery stop frame as described in any one of claims 1 to 8 is connected between the positive electrode cover plate (8) and the core (10).

10. The lithium-ion battery as described in claim 9, characterized in that, The positive electrode cover plate (8) is connected to the tab of the core (10) at the middle part, and the end of the positive electrode cover plate (8) is provided with a liquid injection hole (9).

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