A leak-proof lithium battery structure
By covering the explosion-proof valve with a liquid-absorbing plate to absorb the sprayed electrolyte, the problem of electrolyte contamination and corrosion after the explosion-proof valve of lithium battery is solved, which improves the safety and stability of lithium battery and extends its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- VISION TECH CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-02
AI Technical Summary
In existing lithium batteries, after the explosion-proof valve is depressurized, the electrolyte sprays out and contaminates and corrodes the battery structure and circuit board, resulting in a decrease in insulation performance and posing a safety hazard.
A liquid-absorbing plate is placed on the explosion-proof valve to absorb the sprayed electrolyte and prevent it from spreading.
It effectively prevents electrolyte from corroding the battery structure and circuit board, improves safety and stability, extends service life, and reduces safety hazards.
Smart Images
Figure CN224318655U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery technology, and in particular relates to a leak-proof lithium battery structure. Background Technology
[0002] Safety is paramount in the use of lithium batteries. Currently, in abnormal situations such as short circuits and overcharging, the explosion-proof valve of a lithium battery will open to release pressure, at which point the electrolyte will spray out. Existing lithium batteries generally prevent electrolyte spraying by using a simple protective shell on the outside of the battery; for example, some lithium battery products rely solely on the battery casing to block the diffusion of electrolyte. While the protective shell can reduce the direct impact of electrolyte on the external environment to some extent, it cannot fundamentally solve the problem of handling electrolyte leakage and has significant drawbacks: when electrolyte sprays out, it will spread inside the battery, contaminating and corroding the battery structure and the connected circuit boards. After the circuit boards are corroded, their insulation performance will decrease, making them prone to short circuits and sparks; if the open flames from these sparks ignite the electrolyte, it will cause serious safety accidents, posing a great threat to equipment and personnel safety. In addition, corrosion of the battery structure can easily lead to a decrease in battery performance or even failure, greatly affecting the battery's lifespan. Utility Model Content
[0003] This utility model provides a leak-proof lithium battery structure, which aims to effectively solve the problems of electrolyte leakage after the existing lithium battery explosion-proof valve is depressurized, causing pollution and corrosion to the battery structure and circuit board, and resulting in a decrease in battery insulation.
[0004] To solve the above-mentioned technical problems, this utility model provides a leak-proof lithium battery structure, including a top cover, a PCB circuit board, a liquid-absorbing plate, a cover plate, an explosion-proof valve, and a housing; the cover plate is disposed on the top of the housing, and the PCB circuit board is disposed on the side of the cover plate away from the housing; the explosion-proof valve is disposed on the cover plate, the liquid-absorbing plate is disposed on the explosion-proof valve, and a gap is provided between the liquid-absorbing plate and the PCB circuit board; the top cover is disposed on the top of the housing, and the top cover is closed on top of the PCB circuit board.
[0005] In a preferred embodiment, an accommodating space is formed between the top cover and the top of the housing; the PCB circuit board, the liquid absorption plate and the cover plate are all disposed within the accommodating space.
[0006] In a preferred embodiment, the liquid suction plate is provided with a plurality of liquid suction holes, and each of the liquid suction holes has the same pore diameter.
[0007] In a preferred embodiment, the plurality of suction holes are arranged in a row; the arrangement includes being arranged in columns and rows.
[0008] In a preferred embodiment, the suction holes in two adjacent columns are spaced at equal intervals, and the suction holes in two adjacent rows are spaced at equal intervals.
[0009] In a preferred embodiment, adjacent suction holes in the same column are arranged at equal intervals; adjacent suction holes in the same row are arranged at equal intervals.
[0010] In a preferred embodiment, the liquid suction plate is attached to the explosion-proof valve by adhesive or mechanical fixation; the mechanical fixation method includes fixation methods such as bayonet or clip.
[0011] In a preferred embodiment, the edge of the liquid suction plate is provided with a groove, and the liquid suction plate is secured to the explosion-proof valve through the groove.
[0012] In a preferred embodiment, the absorbent plate is one of chemical absorbent cotton, absorbent gel plate, or porous ceramic absorbent plate. In the embodiments of this application, the absorbent plate is generally made of a material with high absorbency, as long as it can effectively absorb the electrolyte.
[0013] In a preferred embodiment, the cover plate is provided with a plurality of cover plate fixing holes, and the cover plate is fixedly connected to the housing through the plurality of cover plate fixing holes.
[0014] In a preferred embodiment, the PCB circuit board is provided with a plurality of PCB mounting holes, and the PCB circuit board is fixed to the cover plate through the plurality of PCB mounting holes.
[0015] This application covers the explosion-proof valve with a liquid-absorbing plate. When the battery causes the explosion-proof valve to release pressure and spray electrolyte due to safety issues such as short circuit or overcharging, the liquid-absorbing plate can absorb the electrolyte in time by utilizing its adsorption properties, preventing its spread and avoiding pollution and corrosion to the battery structure and circuit board. This also prevents safety accidents caused by short circuits and sparks due to decreased insulation performance, as well as by open flames igniting the electrolyte, effectively improving the safety and stability of lithium battery use.
[0016] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects: The structure of this application can directly absorb electrolyte, effectively preventing its corrosion of the battery structure and circuit board (highly efficient corrosion protection), and extending the service life of the battery and circuit board. Through this structure, safety accidents such as decreased insulation performance, open circuit arcing, and ignition of the electrolyte by open flame caused by electrolyte corrosion are avoided, greatly improving the safety of lithium battery use and reducing safety hazards. The structure of this application is simple, easy to implement, convenient to disassemble and assemble, easy to maintain, and has good stability. It does not require large-scale modifications to the overall battery structure, has low cost, and is easy to manufacture, thus well meeting the needs of practical use. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is an exploded structural diagram of an embodiment of the leak-proof lithium battery structure of the present invention;
[0019] Figure 2 for Figure 1 A schematic diagram of the liquid absorption plate.
[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0022] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0023] Specifically, such as Figures 1 to 2 As shown, this utility model embodiment provides a leak-proof lithium battery structure, including a top cover 10, a PCB circuit board 20, a liquid absorption plate 30, a cover plate 40, an explosion-proof valve 50, and a housing 60; the cover plate 40 is disposed on the top of the housing 60, and the PCB circuit board 20 is disposed on the side of the cover plate 40 away from the housing 60; the explosion-proof valve 50 is disposed on the cover plate 40, the liquid absorption plate 30 is disposed on the explosion-proof valve 50, and a gap is provided between the liquid absorption plate 30 and the PCB circuit board 20; the top cover 10 is disposed on the top of the housing 60, and the top cover 10 covers the PCB circuit board 20.
[0024] In a preferred embodiment, an accommodating space is formed between the top cover 10 and the top of the housing 60; the PCB circuit board 20, the liquid absorption plate 30 and the cover plate 40 are all disposed within the accommodating space.
[0025] In a preferred embodiment, the liquid-absorbing plate 30 is provided with a plurality of liquid-absorbing holes 31, and each liquid-absorbing hole 31 has the same pore diameter. In the embodiments of this application, the liquid-absorbing holes 31 are generally set as circular holes, which can better absorb electrolyte.
[0026] The absorbent plate in this embodiment has excellent hydrophilicity and adsorption capacity, enabling it to quickly and massively absorb electrolyte. During normal operation of the lithium battery, the absorbent plate remains in standby mode and does not affect the battery's normal performance. If the battery experiences an abnormality such as a short circuit or overcharge, the explosion-proof valve opens to release pressure, and electrolyte is ejected. At this time, the absorbent plate immediately comes into play, rapidly adsorbing the electrolyte internally through its capillary action and adsorption properties. The explosion-proof valve, as a key component for battery pressure release, is located at the interface between the battery's internal pressure and the external environment. The absorbent plate covers the explosion-proof valve; when the explosion-proof valve opens, the electrolyte comes into contact with the absorbent plate along the pressure relief channel and is rapidly absorbed, thereby blocking the path of electrolyte diffusion to other parts of the battery.
[0027] In a preferred embodiment, the plurality of suction holes 31 are arranged in a row; the arrangement includes being arranged in columns and rows.
[0028] In a preferred embodiment, the liquid absorption holes 31 in two adjacent columns are equally spaced, and the liquid absorption holes 31 in two adjacent rows are equally spaced. This arrangement effectively ensures that the sprayed electrolyte is well absorbed, preventing electrolyte diffusion.
[0029] In a preferred embodiment, adjacent suction holes 31 in the same column are arranged at equal intervals; adjacent suction holes 31 in the same row are arranged at equal intervals.
[0030] In a preferred embodiment, the liquid suction plate 30 is attached to the explosion-proof valve by adhesive or mechanical fixation; the mechanical fixation method includes fixation methods such as bayonet or clip.
[0031] In a preferred embodiment, the edge of the liquid suction plate 30 is provided with a groove slot 32, and the liquid suction plate 30 is secured to the explosion-proof valve 50 through the groove slot 32.
[0032] In a preferred embodiment, the absorbent plate 30 is one of chemical absorbent cotton, absorbent gel plate, or porous ceramic absorbent plate. In the embodiments of this application, the absorbent plate 30 is generally made of a material with high absorbency, as long as it can effectively absorb the electrolyte.
[0033] In a preferred embodiment, the cover plate 40 is provided with a plurality of cover plate fixing holes 41, and the cover plate 40 is fixedly connected to the housing 60 through the plurality of cover plate fixing holes 41.
[0034] In a preferred embodiment, the PCB circuit board 20 is provided with a plurality of PCB fixing holes 21, and the PCB circuit board 20 is fixed to the cover plate 40 through the plurality of PCB fixing holes 21.
[0035] This application covers the explosion-proof valve with a liquid-absorbing plate. When the battery causes the explosion-proof valve to release pressure and spray electrolyte due to safety issues such as short circuit or overcharging, the liquid-absorbing plate can absorb the electrolyte in time by utilizing its adsorption properties, preventing its spread and avoiding pollution and corrosion to the battery structure and circuit board. This also prevents safety accidents caused by short circuits and sparks due to decreased insulation performance, as well as by open flames igniting the electrolyte, effectively improving the safety and stability of lithium battery use.
[0036] This application's structure can directly absorb electrolyte, effectively preventing corrosion of the battery structure and circuit board (highly efficient corrosion protection), thus extending the lifespan of the battery and circuit board. This structure avoids safety accidents caused by electrolyte corrosion, such as decreased insulation performance, open circuit arcing, and ignition of the electrolyte by open flame, greatly improving the safety of lithium battery use and reducing safety hazards. This application's structure is simple, easy to implement, convenient to assemble and disassemble, easy to maintain, and has good stability. It does not require large-scale modifications to the overall battery structure, has low cost, and is easy to manufacture, thus well meeting the needs of practical applications.
[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A leak-proof lithium battery structure, characterized in that, The device includes a top cover, a PCB circuit board, a liquid-absorbing plate, a cover plate, an explosion-proof valve, and a housing. The cover plate is disposed on the top of the housing, and the PCB circuit board is disposed on the side of the cover plate away from the housing. The explosion-proof valve is disposed on the cover plate, and the liquid-absorbing plate is disposed on the explosion-proof valve, with a gap between the liquid-absorbing plate and the PCB circuit board. The top cover is disposed on the top of the housing and covers the PCB circuit board.
2. The leak-proof lithium battery structure according to claim 1, characterized in that, An accommodating space is formed between the top cover and the top of the housing; the PCB circuit board, the liquid absorption plate and the cover plate are all disposed within the accommodating space.
3. The leak-proof lithium battery structure according to claim 1, characterized in that, The liquid suction plate is provided with multiple liquid suction holes, and each liquid suction hole has the same aperture.
4. The leak-proof lithium battery structure according to claim 3, characterized in that, The plurality of suction holes are arranged in an array; the arrangement includes both column and row arrangement.
5. The leak-proof lithium battery structure according to claim 4, characterized in that, The suction holes in two adjacent columns are spaced at equal intervals, and the suction holes in two adjacent rows are spaced at equal intervals.
6. The leak-proof lithium battery structure according to claim 5, characterized in that, In the same column of suction holes, two adjacent suction holes are arranged at equal intervals; in the same row of suction holes, two adjacent suction holes are arranged at equal intervals.
7. The leak-proof lithium battery structure according to claim 1, characterized in that, The liquid-absorbing plate is attached to the explosion-proof valve by adhesive or mechanical fixation; the mechanical fixation method includes bayonet or clip fixation.
8. The leak-proof lithium battery structure according to claim 1, characterized in that, The edge of the liquid suction plate is provided with a groove and a locking slot, and the liquid suction plate is locked onto the explosion-proof valve through the groove and a locking slot.
9. The leak-proof lithium battery structure according to claim 1, characterized in that, The absorbent plate is one of chemical absorbent cotton, absorbent gel plate, or porous ceramic absorbent plate.
10. The leak-proof lithium battery structure according to claim 1, characterized in that, The cover plate is provided with a plurality of cover plate fixing holes, and the cover plate is fixedly connected to the housing through the plurality of cover plate fixing holes; the PCB circuit board is provided with a plurality of PCB fixing holes, and the PCB circuit board is fixed to the cover plate through the plurality of PCB fixing holes.