Lithium battery capable of reducing occurrence probability of tab embedding
By setting up a multi-layer stop plane and groove structure on the lithium battery stop frame, the safety hazards caused by the insertion of the electrodes are solved, the safety and production pass rate of the battery are improved, and the probability of the insertion of the electrodes is reduced. .
Patent Information
- Application Number
- CN202323629909.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-29
AI Technical Summary
During the production process of lithium batteries, extreme ears are easily embedded due to redundancy, resulting in safety hazards such as short circuits, fires, and smoke. The prior art is difficult to effectively reduce the probability of this occurrence.
A lithium battery structure is designed, in which the stop frame is provided with first, second and third stop planes, grooves are opened between the first and third stop planes, and snaps are provided around the second stop plane Hole, positioning holes are provided on both sides of the snap hole to fix the cover plate, increase the overhead space of the electrode, and reduce the possibility of the electrode insertion.
By increasing the overhead space of the electrode, the probability of the electrode embedded is reduced, the battery safety and production pass rate are improved, and the short circuit and fire risks caused by the electrode embedded are avoided.
Smart Images
Figure CN222261311U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery capable of reducing the probability of tab embedding. Background Art
[0002] New energy vehicle technology is becoming more mature, and hybrid vehicle technology is also becoming more perfect. Among them, power batteries are the main energy carrier and power source of various electric vehicles, and are also the main component of electric vehicles. In addition to high capacity, these power batteries should also have good safety and long cycle life to better meet the requirements of use.
[0003] The battery cover is directly related to the high energy density, high safety and high stability of the battery. It is the most important barrier to ensure that the battery does not fail. The stop frame is the supporting bridge between the cover and the core. It presses the core tightly while ensuring that the cover and the core are at an appropriate distance and insulated, thereby improving the stability of the core inside the battery and avoiding safety hazards caused by failures such as the shedding of the insulation film inside the battery, the breaking of the pole ear, and the misalignment of the pole piece due to the deviation and movement of the core.
[0004] During the battery production process, the positive and negative electrode tabs are easily embedded due to tab redundancy. Once the tabs are embedded in the core, a short circuit will occur. Even if the short-circuit test process fails to eliminate it, during subsequent use, the tabs at the critical point of embedding will overlap with the pole piece due to extrusion, vibration and other factors, eventually causing fire and smoke. Summary of the invention
[0005] The utility model aims to provide a lithium battery with a reduced probability of tab embedding, so as to solve the problems raised in the above-mentioned background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery that reduces the probability of tab embedding, comprising a lithium battery shell, an insulating bag is provided at the inner edge of the shell, a winding core is installed inside the insulating bag, a negative tab and a positive tab are installed on both sides of the top of the winding core, a stop frame is provided above the tab, a cover plate is fixedly connected above the stop frame; a first stop plane, a second stop plane and a third stop plane are provided on the stop frame, a groove is provided in the middle of the first and third stop planes, snap holes are provided around the second stop plane, and a first positioning hole and a second positioning hole are provided on both sides of the snap hole.
[0007] Preferably, there are four snap holes, which are respectively arranged at four corners of the second stopping plane.
[0008] Preferably, the second stopping plane is arranged at the center of the stopping frame, and the first stopping plane and the third stopping plane are respectively arranged at two ends of the second stopping plane.
[0009] Preferably, the first stop plane and the third stop plane correspond to the positive and negative electrode ears, and the grooves can accommodate the positive and negative electrode ears to prevent the electrode ears from being excessively bent and causing damage to the battery.
[0010] Compared with the prior art, the beneficial effect of the utility model is as follows: the lithium battery described in the utility model reduces the probability of the pole ear being embedded, and a first stop plane and a second stop plane are arranged on both sides, and a groove is opened in the plane, which can increase the overhead space of the pole ear. Even if the pole ear is squeezed, there is enough space buffer between the pole ear and the battery cell, reducing the probability of the pole ear being embedded. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is an exploded diagram of the lithium battery structure of the utility model;
[0012] Figure 2 This is a top view of the stop frame of the utility model;
[0013] Figure 3 This is a first stop plane stereogram of the utility model;
[0014] In the figure: 1, shell; 2, winding core; 3, negative ear; 4, positive ear; 5, stop frame; 501, first stop plane; 5001, groove; 502, second stop plane; 503, third stop plane; 504, first positioning hole; 505, second positioning hole; 506, snap hole; 6, cover plate; 7, insulation bag. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] See also Figure 1-3 The utility model provides a technical solution: a lithium battery with reduced probability of tab embedding, comprising a shell 1, an insulating bag 7 provided on the inner edge of the shell 1, a winding core 2 installed inside the insulating bag 7, a negative tab 3 and a positive tab 4 connected to the top two sides of the winding core 2, a stop frame 5 provided above the tab, and a cover plate 6 fixedly connected to the top of the stop frame 5.
[0017] As an embodiment of the utility model, the stop frame 5 includes a second stop plane 502 located at the central position of the stop frame 5, the first stop plane 501 and the third stop plane 503 are symmetrically arranged at both ends of the second stop plane 502, and a groove 5001 is opened in the center of the first stop plane 501.
[0018] As an implementation mode of the present invention, a buckle hole 506 is respectively provided at the four corners of the second stop plane 502 .
[0019] As an implementation mode of the present utility model, a first positioning hole 504 and a second positioning hole 505 are respectively provided on both sides of the buckle hole 506, and the cover plate 6 and the two positioning holes are matched with each other for fixing.
[0020] As an implementation mode of the present utility model, the cover plate 6, the stop frame 5 and the housing 1 are arranged in sequence from top to bottom.
[0021] As an implementation mode of the present utility model, two groups of winding cores 2 are arranged in the insulation bag 7, and the two groups of winding cores 2 are arranged side by side.
[0022] The working principle of the utility model is as follows: a first stop plane and a third stop plane are arranged at both ends of the stop frame, and a groove is opened at the central position thereof, and the pole ear is accommodated in the groove, thereby increasing the pole ear overhead space, so that even if the pole ear is bent, there is enough reserved buffer space, reducing the probability of the pole ear being bent, improving the safety of the battery, and improving the production qualification rate, and having the advantages of easy operation and simple structure.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lithium battery for reducing the probability of tab embedding, comprising a housing (1), an insulating bag (7) provided at the inner edge of the housing (1), a winding core (2) installed inside the insulating bag (7), a negative tab (3) and a positive tab (4) connected to the top two sides of the winding core (2), a stop frame (5) provided above the tab, a cover plate (6) fixedly connected above the stop frame (5), characterized in that: The stop frame (5) comprises a second stop plane (502) located at the central position of the stop frame (5), a first stop plane (501) and a third stop plane (503) are symmetrically arranged at two ends of the second stop plane (502), and a groove (5001) is provided in the center of the first stop plane (501).
2. A lithium battery with reduced probability of tab embedding according to claim 1, characterized in that: A snap hole (506) is respectively provided at the four corners of the second stop plane (502).
3. A lithium battery with reduced probability of tab embedding according to claim 2, characterized in that: A first positioning hole (504) and a second positioning hole (505) are respectively provided on both sides of the buckle hole (506).
4. A lithium battery with reduced probability of tab embedding according to claim 1, characterized in that: Two groups of winding cores (2) are arranged in the insulation bag (7), and the two groups of winding cores (2) are arranged side by side.