Accurate blasting battery explosion-proof structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery explosion-proof structure capable of accurately blasting and a battery, the battery explosion-proof structure capable of accurately blasting comprises a shell, an inner cavity for accommodating a battery cell is arranged in the shell, an explosion-proof sheet is arranged on the shell, a guide structure is arranged in the inner cavity, and when the pressure of internal gas in the inner cavity is increased, the explosion-proof sheet is arranged in the guide structure. The guide structure guides internal gas to face the anti-explosion sheet; according to the battery explosion-proof structure capable of accurately blasting, the guide structure is arranged in the inner cavity, and when the internal air pressure in the inner cavity is abnormally increased and exceeds a set value and the explosion-proof sheet bursts, the internal air in the battery faces the explosion-proof sheet through the guide structure, so that a channel capable of enabling the explosion-proof sheet to be smoothly blasted is formed in the inner cavity; therefore, the purpose of accurate bursting of the subsequent anti-explosion sheet is achieved.

Description

Technical Field

[0001] This utility model patent relates to the technical field of batteries, specifically to an explosion-proof battery structure and battery for accurate explosion. Background Technology

[0002] Batteries are widely used in new energy electric vehicles, energy storage, mobile devices and other related products. With the rise of new energy, battery technology and demand are growing rapidly.

[0003] The battery includes a casing with an inner cavity containing a battery cell. An explosion-proof diaphragm is installed on the casing. When the battery is in an abnormal state, the internal gas pressure increases sharply. When the internal gas pressure exceeds a set value, the explosion-proof diaphragm ruptures, and the internal gas of the battery leaks out through the explosion-proof vent, thus protecting the battery and preventing it from exploding.

[0004] In existing technologies, when the internal air pressure exceeds the set value, the battery casing often expands and deforms because it cannot be guided to the explosion-proof sheet for precise rupture. In some cases, the battery may even deform rapidly before the explosion-proof sheet bursts. Utility Model Content

[0005] The purpose of this invention is to provide a battery explosion-proof structure that can accurately burst, aiming to solve the problem that explosion-proof discs cannot burst accurately in the prior art.

[0006] This utility model is achieved as follows: an explosion-proof battery structure for accurate explosion-proofing includes a housing, an inner cavity for housing the battery cell, an explosion-proof sheet on the housing, a fixedly arranged partition between the battery cell and the explosion-proof sheet, and a vent hole penetrating the partition, the vent hole being arranged towards the explosion-proof sheet.

[0007] Furthermore, the guiding structure includes a partition plate fixedly arranged between the battery cell and the explosion-proof sheet. The partition plate has vent holes penetrating through it, and the vent holes face the explosion-proof sheet. The partition plate has multiple vent holes, which are spaced apart from each other.

[0008] Furthermore, the plurality of the vent holes are arranged in a spaced-around pattern.

[0009] Furthermore, the outer side of the battery cell is wrapped with an insulating film, and the separator is fixedly connected to the insulating film.

[0010] Furthermore, the partition is welded and fixed to the insulating film.

[0011] Furthermore, the battery cell is provided with tabs, and the insulating film is wrapped around the outside of the tabs.

[0012] Furthermore, the partition has a gas guiding area facing the explosion-proof sheet and a fixing part surrounding the outer periphery of the gas guiding area, the fixing part being fixedly arranged, and the vent hole being disposed in the gas guiding area.

[0013] Furthermore, the fixing part abuts against the housing, and there is a gas-guiding gap between the gas-guiding area and the explosion-proof sheet.

[0014] Furthermore, the air guiding area is recessed downwards to form a recessed area, which is arranged towards the explosion-proof sheet, and the top of the vent hole is connected to the recessed area.

[0015] Compared with the prior art, the battery explosion-proof structure for accurate explosion provided by this utility model arranges a guide structure in the inner cavity. When the internal gas pressure in the inner cavity abnormally increases and exceeds the set value, after the explosion-proof sheet explodes, the internal gas in the battery is directed towards the explosion-proof sheet through the guide structure, so that the inner cavity has a channel that allows the explosion-proof sheet to explode smoothly, thereby achieving the purpose of accurate explosion of the subsequent explosion-proof sheet.

[0016] This utility model also provides a battery, including the aforementioned accurate explosion-proof battery structure.

[0017] Compared with the prior art, the battery provided by this utility model has a separator in the battery. Its fixed arrangement can play a supporting role and prevent the battery cell from shaking. The vent holes on the separator can accurately guide the internal gas. When the gas pressure in the battery increases abnormally and exceeds the set value, it provides a guiding channel for the precise explosion of the explosion-proof sheet, thus achieving the effect of precise explosion of the explosion-proof sheet. Attached Figure Description

[0018] Figure 1 This is a cross-sectional three-dimensional schematic diagram of the accurate explosion-proof battery structure provided by this utility model;

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the diagram;

[0020] In the figure: housing 100, inner cavity 101; fixing part 201, air guiding area 202, vent 2021; explosion-proof plate 300. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figure 1-2 The image shown is a preferred embodiment of the present invention.

[0025] The battery explosion-proof structure for accurate explosion includes a housing 100, an inner cavity 101 containing a battery cell in the housing 100, an explosion-proof plate 300 on the housing 100, and a guide structure in the inner cavity 101. When the internal gas pressure in the inner cavity increases, the guide structure guides the internal gas toward the explosion-proof plate 300.

[0026] When the battery is in an abnormal state, the internal pressure of the battery will increase sharply. When the internal pressure exceeds the set pressure value, the explosion-proof sheet 300 will burst, and the internal gas of the battery will leak out through the explosion-proof hole, preventing the internal pressure of the battery from continuing to increase and causing phenomena such as battery explosion, thus improving the safety of battery use.

[0027] The aforementioned accurate explosion-proof battery structure, by arranging a guide structure in the inner cavity, ensures that when the internal gas pressure in the inner cavity 101 abnormally increases beyond a set value, the explosion-proof disc 300 explodes. The internal gas in the battery then passes through the guide structure toward the explosion-proof disc, thus creating a channel in the inner cavity 101 that allows the explosion-proof disc to explode smoothly, thereby achieving the purpose of accurate explosion of the subsequent explosion-proof disc 300.

[0028] The housing 100 includes a top cover and an outer shell, and the explosion-proof plate can be installed on the top cover or the outer shell.

[0029] In this embodiment, the guiding structure includes a partition plate fixedly arranged between the battery cell and the explosion-proof sheet 300. The partition plate has vent holes 2021 penetrating through it, with the vent holes 2021 facing the explosion-proof sheet 300. The partition plate has multiple vent holes 2021, spaced apart from each other. Thus, multiple vent holes 2021 provide multiple channels for guiding internal gas, enabling precise bursting of the explosion-proof sheet 300 and facilitating rapid, multi-location discharge of internal gas.

[0030] The fixed arrangement of the partition can provide support and limit the shaking of the battery cell. Secondly, the partition is provided with a vent 2021 opposite to the explosion-proof plate 300, which provides a guiding channel for the precise explosion of the explosion-proof plate 300, so that the explosion-proof plate 300 can explode accurately. When the internal air pressure of the housing 100 increases abnormally and exceeds the set value, after the explosion-proof plate 300 explodes, the internal gas in the battery can be guided through the vent 2021 and smoothly discharged to the explosion-proof hole.

[0031] In this embodiment, multiple vent holes 2021 are arranged in a spaced-around pattern. In this way, the multiple vent holes 2021 can form a ring to provide a guiding channel for the precise bursting of the explosion-proof sheet 300, enhance the guiding uniformity, and greatly improve the guiding accuracy.

[0032] The outer side of the battery cell is wrapped with an insulating film, and the separator is fixedly connected to the insulating film. This fixes the separator to the battery cell and keeps the separator in a fixed state to ensure the stability of the battery cell and prevent the battery cell from shaking.

[0033] In this embodiment, the separator is welded and fixed to the insulating film so that the separator and the insulating film are fixed as one piece, thereby keeping the position of the battery cell stable and fixed.

[0034] In this embodiment, the battery cell is provided with tabs, and an insulating film is wrapped around the outside of the tabs. This maintains the insulation between the separator and the battery cell and the tabs. The insulating film between the separator and the tabs is fixedly arranged, which can also prevent the tabs from being pulled or shaken.

[0035] In this embodiment, the partition has a venting area 202 facing the explosion-proof sheet 300 and a fixing part 201 surrounding the outer periphery of the venting area 202. The fixing part 201 is fixedly arranged, and the vent hole 2021 is provided in the venting area 202. This facilitates the structural arrangement of the partition, and the fixing part 201 is used for fixed connection without affecting the relative arrangement between the venting area 202 and the explosion-proof sheet 300.

[0036] In this embodiment, the fixing part 201 abuts against the housing, and there is a gas guiding gap between the gas guiding area 202 and the explosion-proof plate 300. In this way, the internal air cylinder enters into the gas guiding gap through the vent 2021 of the gas guiding area 202. The existence of the gas guiding gap avoids the partition from interfering with the position of the explosion-proof plate 300, and is conducive to guiding the internal gas through the vent 2021, providing a precise guiding channel for the precise explosion of the explosion-proof plate 300.

[0037] In this embodiment, the gas guiding area 202 is recessed downwards to form a concave area, which is arranged towards the explosion-proof plate 300. The top of the vent 2021 is connected to the concave area. By forming the concave area, which is arranged towards the explosion-proof plate 300 and connected to the gas guiding area, the guiding distance between the partition and the explosion-proof plate 300 can be appropriately increased. This facilitates the arrangement of the vent 2021 on the partition and better guides the internal gas towards the explosion-proof plate 300.

[0038] In this embodiment, the fixing part 201 is welded to the insulating film. By fixing the fixing part 201 to the insulating film, since the fixing part 201 surrounds the outer periphery of the air guiding area 202, full circumferential welding and fixing can be achieved, so that the fixed connection between the partition and the insulating film is more stable.

[0039] This embodiment also provides a battery, which includes the aforementioned accurate explosion-proof battery structure. Because a separator is installed in the battery, its fixed arrangement provides support and prevents the battery cells from shaking. Furthermore, the vent holes 2021 on the separator allow for precise guidance of internal gas. When the gas pressure in the battery abnormally increases beyond a set value, it provides a guiding channel for the precise explosion of the explosion-proof disc 300, achieving the effect of precise explosion of the explosion-proof disc 300.

[0040] 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 battery explosion-proof structure for accurate explosion, characterized in that, The device includes a housing with an inner cavity containing a battery cell. The housing is equipped with an explosion-proof sheet, and the inner cavity is equipped with a guide structure. When the internal gas pressure in the inner cavity increases, the guide structure guides the internal gas toward the explosion-proof sheet.

2. The accurate explosion-proof battery structure as described in claim 1, characterized in that, The guiding structure includes a partition plate that is fixedly arranged between the battery cell and the explosion-proof sheet. The partition plate has a vent hole that penetrates the partition plate and is arranged facing the explosion-proof sheet. The partition plate has a plurality of vent holes that are spaced apart from each other.

3. The accurate explosion-proof battery structure as described in claim 2, characterized in that, The multiple vent holes are arranged in a spaced-around pattern.

4. The accurate explosion-proof battery structure as described in claim 2 or 3, characterized in that, The outer side of the battery cell is wrapped with an insulating film, and the separator is fixedly connected to the insulating film.

5. The accurate explosion-proof battery structure as described in claim 4, characterized in that, The partition is welded and fixed to the insulating film.

6. The accurate explosion-proof battery structure as described in claim 4, characterized in that, The battery cell is provided with tabs, and the insulating film is wrapped around the outside of the tabs.

7. The accurate explosion-proof battery structure as described in claim 2 or 3, characterized in that, The partition has a gas guiding area facing the explosion-proof sheet and a fixing part surrounding the outer periphery of the gas guiding area. The fixing part is fixedly arranged, and the vent is located in the gas guiding area.

8. The accurate explosion-proof battery structure as described in claim 7, characterized in that, The fixing part abuts against the housing, and there is a gas-guiding gap between the gas-guiding area and the explosion-proof plate.

9. The accurate explosion-proof battery structure as described in claim 7, characterized in that, The air guiding area is recessed downwards to form a recessed area, which is arranged towards the explosion-proof sheet, and the top of the vent hole is connected to the recessed area.

10. A battery, characterized in that, The battery explosion-proof structure includes the accurate explosion-proof structure according to any one of claims 1 to 9.

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