Monomer cell
By optimizing the cell housing design, with injection holes and explosion-proof valves at both ends and an electrode post in the middle, the groove and bump structure blocks the electrolyte, solving the safety problem during cell thermal runaway and improving safety and energy density.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI GANFENG BATTERY TECH
- Filing Date
- 2024-11-29
- Publication Date
- 2026-05-12
AI Technical Summary
In the event of thermal runaway, the explosion-proof valve and electrolyte injection port of existing battery cells are easily ruptured, leading to electrolyte corrosion of the electrode posts and poor safety.
Design a battery cell housing with injection holes and explosion-proof valves at both ends, and an electrode post in the middle. The grooves are symmetrically distributed and have protrusions to block the electrolyte. The height of the electrode post is less than 1/2 of the groove depth to facilitate the installation of the busbar.
It effectively reduces the corrosive effect of electrolyte on the electrode during thermal runaway, improves safety, and enhances the energy density of the battery module.
Smart Images
Figure CN224232739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium-ion batteries, and in particular to a single battery cell. Background Technology
[0002] In electric vehicles, energy storage systems, and other electronic devices, batteries serve as the core energy storage unit and are typically used in large modules. Individual battery cells are one of the key components of these modules. Although various types of individual battery cells exist, some significant defects and shortcomings still remain.
[0003] Existing cell explosion-proof valves and electrolyte injection holes are usually located between the terminals on the top cover plate. When the cell experiences thermal runaway, the explosion-proof valve will be ruptured, and leakage will occur in the electrolyte injection hole. The electrolyte seeping out from the explosion-proof valve and the electrolyte injection hole will corrode the terminals, exacerbating short circuits and resulting in poor safety.
[0004] Therefore, we propose a single-cell battery design to address the aforementioned issues. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a single-cell battery.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A single battery cell includes a housing, a first groove on one side of the top of the housing, an explosion-proof valve on the first groove, a second groove on the side of the top of the housing opposite to the first groove, an injection hole on the second groove, and a third groove in the middle of the top of the housing, with an electrode post inside the third groove.
[0008] More preferably, the first groove and the second groove are symmetrically arranged with the third groove as the center.
[0009] More preferably, a first protrusion is provided between the first groove and the third groove, and a second protrusion is provided between the second groove and the third groove.
[0010] More preferably, the top surface of the first protrusion and the top surface of the second protrusion are located on the same horizontal plane.
[0011] More preferably, the top surface of the pole post is lower than the top surfaces of the first protrusion and the second protrusion.
[0012] More preferably, the height of the pole post is less than 1 / 2 of the depth of the third groove.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] By designing a battery cell housing that is integrally formed, with two grooves at both ends for placing an injection port and an explosion-proof valve respectively, and a groove in the middle for placing two terminals, the design effectively reduces the impact of electrolyte on the terminals during thermal runaway. When the explosion-proof valve is ruptured and leakage occurs in the injection port, the electrolyte seeping out from the explosion-proof valve and injection port is less likely to corrode the terminals, thus ensuring high safety. Attached Figure Description
[0015] Figure 1 This is an overall structural diagram of a single battery cell proposed in this utility model.
[0016] In the diagram: 1. Housing; 2. First groove; 3. Explosion-proof valve; 4. Second groove; 5. Injection hole; 6. First protrusion; 7. Second protrusion; 8. Third groove; 9. Terminal post. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0018] Reference Figure 1 A single battery cell includes a housing 1, with a first groove 2 provided on one side of the top end of the housing 1.
[0019] An explosion-proof valve 3 is installed on the top. When thermal runaway occurs inside the battery cell, a large amount of gas will be generated. The gas will cause the internal pressure of the battery cell to increase. At this time, the gas will break through the explosion-proof valve 3, which can prevent an explosion.
[0020] A second groove 4 is provided on the side opposite to the first groove 2 at the top of the housing 1. An injection hole 5 is provided on the second groove 4. After the core inside the housing 1 is installed, electrolyte is injected into the inside of the housing 1 through the injection hole 5 to form a battery cell. The injection hole 5 can be sealed with a sealing pin. A third groove 8 is provided at the middle position of the top of the housing 1. An electrode post 9 is provided in the third groove 8.
[0021] By designing a battery cell housing 1, which is integrally formed, two grooves are provided at both ends of the battery cell housing 1, respectively housing a liquid injection hole 5 and an explosion-proof valve 3. A groove is provided in the middle of the battery cell housing 1 to house two electrode posts 9, which can effectively reduce [damage / risk].
[0022] During thermal runaway, the electrolyte affects the electrode post 9. When the explosion-proof valve 3 is ruptured and leakage occurs in the injection hole 5, the electrolyte seeping out of the explosion-proof valve 3 and the injection hole 5 is not likely to corrode the electrode post 9, thus ensuring strong safety.
[0023] The first groove 2, the second groove 4, and the third groove 8 are symmetrically arranged with the center as the center, so that the first groove 2 and the second groove 4 have the same shape, the battery cell is more balanced as a whole, and it can be more stable during installation, which is convenient for mass production.
[0024] In a further preferred embodiment, a first protrusion 6 is provided between the first groove 2 and the third groove 8. The first protrusion 6 can block the first groove 2 and the third groove 8 to prevent the electrolyte after the explosion-proof valve 3 is ruptured from affecting the electrode post 9. A second protrusion 7 is provided between the second groove 4 and the third groove 8. The second protrusion 7 can block the second groove 4 and the third groove 8 to prevent the electrolyte leaking from the injection hole 5 after the explosion-proof valve 3 is ruptured from affecting the electrode post 9.
[0025] The top surfaces of the first protrusion 6 and the second protrusion 7 are located on the same horizontal plane. The first protrusion 6 and the second protrusion 7 have the same shape, so the battery cell is more balanced as a whole, which makes it more stable during installation and facilitates mass production.
[0026] The top surface of the pole post 9 is lower than the top surfaces of the first protrusion 6 and the second protrusion 7, so that the top of the housing 1 will not touch the pole post 9 when it comes into contact with other objects, thus protecting the pole post 9 and extending its service life.
[0027] The height of the pole post 9 is less than half the depth of the third groove 8, which facilitates the installation of busbars or data acquisition lines. The reserved space can accommodate busbars or data acquisition lines, effectively improving space utilization. As a result, multiple individual cells can be installed in a battery module, which can effectively improve energy density.
Claims
1. A single battery cell, comprising a casing, characterized in that, A first groove is provided on one side of the top of the housing, and an explosion-proof valve is provided on the first groove. A second groove is provided on the side of the top of the housing opposite to the first groove, and an injection hole is provided on the second groove. A third groove is provided in the middle of the top of the housing, and an electrode post is provided in the third groove.
2. A single battery cell according to claim 1, characterized in that, The first groove and the second groove are symmetrically arranged with the third groove as the center.
3. A single battery cell according to claim 1, characterized in that, A first protrusion is provided between the first groove and the third groove, and a second protrusion is provided between the second groove and the third groove.
4. A single battery cell according to claim 3, characterized in that, The top surfaces of the first and second protrusions are located on the same horizontal plane.
5. A single battery cell according to claim 4, characterized in that, The top surface of the pole post is lower than the top surfaces of the first and second protrusions.
6. A single battery cell according to claim 1, characterized in that, The height of the pole post is less than 1 / 2 of the depth of the third groove.