Anti-puncture lithium ion battery
The lithium-ion battery design with a protective shell and sealant addresses thermal and electrical failures by redirecting punctures and sealing to prevent explosions.
Patent Information
- Application Number
- CN202422246106.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-12
AI Technical Summary
New energy vehicle batteries are prone to thermal and electrical outage when impacted, resulting in spontaneous combustion or explosion, especially when they are not damaged and communicate with the outside world, the explosion is more powerful and lacks an effective anti-puncture mechanism.
The corrugated plate, buffer assembly, carbon fiber layer and bottom plate structure is adopted to change the puncture direction of the sharp object through the corrugated plate, and the puncture is hindered by the buffer assembly and carbon fiber layer. The puncture liquid is cured after puncture to prevent oxygen invasion and maintain the sealing of the battery compartment.
Effectively change the puncture direction of sharp objects, hinder puncture, prevent the battery from spontaneous combustion or explosion, and improve the safety and sealing of the battery after puncture.
Smart Images
Figure CN223109051U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lithium-ion batteries, and specifically relates to a lithium-ion battery that can prevent puncture. Background Art
[0002] When the battery of a new energy vehicle is damaged by impact, two types of failures usually occur: thermal runaway and electrical runaway. Thermal runaway means that the internal temperature of the battery continues to rise. Due to internal short-circuit of the battery, the short-circuit current will generate a large amount of heat, causing the organic electrolyte to decompose - the battery to bulge - and finally the battery to rupture - catch fire - explode. Electrical runaway is caused by internal defects of the battery or external accidents. The organic electrolyte inside the battery will decompose on the electrodes, generating a large amount of gas, resulting in the battery bulging and exploding. These two types of failures usually occur together. At this time, if the battery pack is not damaged and connected to the outside, the continuously accumulating pressure will cause a greater explosion force in the subsequent explosion. Therefore, it is urgent to propose a battery puncture-proof explosion-proof mechanism. Content of the Utility Model
[0003] In order to solve the above technical problems, the utility model provides a lithium-ion battery that can prevent puncture, including a battery, a protective shell, and a puncture-proof unit. The battery is wrapped in the protective shell. The battery is a blade battery and includes a partition plate and battery plates arranged at intervals. The protective shell includes a sleeve-shaped bottom plate one and support plates fixedly connected to both ends of the bottom plate one. The puncture-proof unit includes a corrugated plate, a buffer assembly, a carbon fiber layer, and a bottom plate two. The carbon fiber layer and the bottom plate two are sleeved on the outside of the bottom plate one from the inside to the outside in sequence. The corrugated plate is connected to the outside of the bottom plate two through the buffer assembly. Both ends of the corrugated plate, the carbon fiber layer, and the bottom plate two are fixedly connected to the corresponding support plates.
[0004] Furthermore, the battery plates are of the same size and arranged at equal intervals, and the partition plate is made of insulating material.
[0005] Furthermore, the carbon fiber layer includes several layers of carbon fiber cloth.
[0006] Furthermore, the buffer assembly includes a fixed rod, several groove blocks, and elastic members. The groove blocks are fixedly arranged on the outside of the bottom plate two. The grooves of the groove blocks face the corrugated plate and correspond to the peak positions of the corrugated plate. One end of the fixed rod is fixedly connected to the peak of the corrugated plate. The other end of the fixed rod matches the groove of the groove block and is arranged in the groove, and one end of the fixed rod located in the groove is fixedly connected to the bottom of the groove through the elastic member.
[0007] Furthermore, the corrugated plate is an elastic steel plate.
[0008] Furthermore, the troughs of the corrugated plate are arranged corresponding to the positions of the partition plates, and a puncture-proof liquid is filled between the corrugated plate and the bottom plate two.
[0009] Further, the puncture-proof liquid is an adhesive, and the curing initiator of the puncture-proof liquid is the oxygen in the air.
[0010] The present utility model further includes other devices or components that can enable the puncture-proof lithium-ion battery to be used normally, which are all conventional technical means in the art. In addition, the blade battery and the carbon fiber cloth not defined in the present utility model both adopt conventional technical means in the art.
[0011] The working principle of the present utility model is that when the puncture-proof lithium-ion battery encounters a sharp object piercing its surface, the corrugated plate guides the piercing direction to the trough of the corrugated plate, so that the sharp object will not damage the blade battery. The buffer component plays a certain obstructive role on the sharp object. The bottom plate one, the carbon fiber cloth and the bottom plate two obstruct the sharp object from piercing the battery. When the battery is pierced, the puncture-proof liquid flows into the battery along the sharp object and contacts the air to solidify, preventing the battery from spontaneous combustion or explosion.
[0012] The beneficial effect of the present utility model is that the device changes the piercing direction of the sharp object through the corrugated plate. The buffer component, the bottom plate one, the carbon fiber cloth and the bottom plate two obstruct the sharp object from piercing the battery. When the piercing is formed, the puncture-proof liquid will overflow along the piercing part, quickly solidify after contacting the outside air, block the intrusion of oxygen, reduce the spontaneous combustion conditions, and at the same time maintain the airtightness of the battery compartment, improving the safety after the piercing occurs. Description of the Drawings
[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0014] Figure 1 is the overall structural schematic diagram of the present utility model.
[0015] Figure 2 is the structural schematic diagram of the puncture-proof unit in the present utility model.
[0016] Figure 3 is the structural schematic diagram of the buffer mechanism in the present utility model. Detailed Embodiments
[0017] The present utility model will be clearly described below in conjunction with the drawings in the embodiments of the present utility model and the specific embodiments. The description here is only used to explain the present utility model, but not to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present utility model.
[0018] Embodiment
[0019] As Figures 1 to 3As shown in the figure, a puncture-proof lithium-ion battery provided by the utility model includes a battery, a protective shell, and a puncture-proof unit. The battery is wrapped in the protective shell. The battery is a blade battery and includes a partition plate 1 and a battery plate 2 arranged at intervals. The protective shell includes a sleeve-shaped bottom plate 1 3 and support plates 4 fixedly connected to both ends of the bottom plate 1 3. The puncture-proof unit includes a corrugated plate 5, a buffer assembly, a carbon fiber layer 6, and a bottom plate 2 7. The carbon fiber layer 6 and the bottom plate 2 7 are sleeved on the outside of the bottom plate 1 3 in sequence from the inside to the outside. The corrugated plate 5 is connected to the outside of the bottom plate 2 7 through the buffer assembly. Both ends of the corrugated plate 5, the carbon fiber layer 6, and the bottom plate 2 7 are fixedly connected to the corresponding support plates 4.
[0020] As a further measure of the utility model, the battery plates 2 are of the same size and arranged at equal distances. The partition plate 1 is made of insulating material; the carbon fiber layer 6 includes several layers of carbon fiber cloth; the buffer assembly includes a fixed rod 8, several groove blocks 9, and an elastic member 10. The groove blocks 9 are fixedly arranged on the outside of the bottom plate 2 7. The grooves of the groove blocks 9 face the corrugated plate 5 and correspond to the peak positions of the corrugated plate 5. One end of the fixed rod 8 is fixedly connected to the peak of the corrugated plate 5. The other end of the fixed rod 8 matches the groove of the groove block 9 and is arranged in the groove. And one end of the fixed rod 8 located in the groove is fixedly connected to the bottom of the groove through the elastic member 10; the corrugated plate 5 is an elastic steel plate; the trough of the corrugated plate 5 corresponds to the position of the partition plate 1; a puncture-proof liquid 11 is filled between the corrugated plate 5 and the bottom plate 2 7; the puncture-proof liquid 11 is an adhesive, and the curing initiator of the puncture-proof liquid 11 is the oxygen in the air.
[0021] The working principle of the utility model is that when the puncture-proof lithium-ion battery encounters a sharp object piercing its surface, the corrugated plate 5 guides the piercing direction to the trough of the corrugated plate 5, so that the sharp object will not damage the blade battery. The buffer assembly plays a certain obstructive role on the sharp object. The bottom plate 1 3, the carbon fiber cloth, and the bottom plate 2 7 prevent the sharp object from piercing the battery. When the battery is pierced, the puncture-proof liquid 11 flows into the battery along the sharp object and cures when contacting the air, preventing the battery from spontaneous combustion or explosion.
[0022] The embodiments of the utility model have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.
Claims
1. A puncture-proof lithium-ion battery, comprising a battery, a protective case, and a puncture-proof unit, characterized in that: The battery is wrapped in a protective case. The battery is a blade battery and includes a separator plate and a battery plate arranged at intervals. The protective case includes a sleeve-shaped bottom plate one and support plates fixedly connected to both ends of the bottom plate one. The anti-puncture unit includes a corrugated plate, a buffer assembly, a carbon fiber layer, and a bottom plate two. The carbon fiber layer and the bottom plate two are sleeved on the outside of the bottom plate one from the inside to the outside in sequence. The corrugated plate is connected to the outside of the bottom plate two through the buffer assembly. Both ends of the corrugated plate, the carbon fiber layer, and the bottom plate two are fixedly connected to the corresponding support plates.
2. The puncture-proof lithium-ion battery according to claim 1, wherein: The battery plates are of the same size and arranged at equal distances. The separator plate is made of an insulating material.
3. The puncture-proof lithium-ion battery according to claim 1, characterized in that: The carbon fiber layer includes a plurality of layers of carbon fiber cloth.
4. A puncture-proof lithium-ion battery according to claim 1, characterized in that: The buffer assembly includes a fixing rod, a plurality of groove blocks, and an elastic member. The groove blocks are fixedly arranged on the outside of the bottom plate two. The grooves of the groove blocks face the corrugated plate and correspond to the peak positions of the corrugated plate. One end of the fixing rod is fixedly connected to the peak of the corrugated plate. The other end of the fixing rod is matched with the groove of the groove block and arranged in the groove. And one end of the fixing rod located in the groove is fixedly connected to the bottom of the groove through the elastic member.
5. The puncture-proof lithium-ion battery according to claim 1, wherein: The corrugated plate is an elastic steel plate.
6. A puncture-proof lithium-ion battery according to claim 1, characterized in that: The troughs of the corrugated plate are arranged corresponding to the positions of the separator plates. An anti-puncture liquid is filled between the corrugated plate and the bottom plate two.
7. The puncture-proof lithium-ion battery according to claim 6, characterized in that: The anti-puncture liquid is an adhesive. The curing initiator of the anti-puncture liquid is the oxygen in the air.