Explosion-proof valve mounting structure and battery

Abstract

This utility model belongs to the field of battery technology, specifically disclosing an explosion-proof valve mounting structure and a battery. The explosion-proof valve mounting structure includes a mounting plate, an explosion-proof valve, and a clamping component. The mounting plate has a coaxial first mounting hole and a recessed platform. The annular portion of the clamping component presses the fixing portion of the explosion-proof valve against the bottom wall of the recessed platform. The peripheral sidewalls of the annular portion and the peripheral sidewalls of the fixing portion are welded to the sidewalls of the recessed platform. The explosion-proof valve is flat, eliminating the need for thinning or stamping sheet metal as required in conventional explosion-proof valves. This reduces the work hardening effect caused by plastic deformation during processing, resulting in higher stability of the valve's opening pressure. Furthermore, the clamping component improves the structural strength at the connection between the explosion-proof valve and the top cover plate, ensuring that the explosion-proof valve is reliably and stably fixed to the mounting plate. This utility model also provides a battery, including the above-mentioned explosion-proof valve mounting structure.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an explosion-proof valve mounting structure and a battery. Background Technology

[0002] Batteries are generally equipped with an explosion-proof valve for venting pressure. This valve can be installed on the battery cover or the casing. During battery use, if the internal pressure of the battery abnormally increases and reaches the opening pressure of the explosion-proof valve, the valve will open to release the pressure, thus preventing the battery from exploding.

[0003] Currently, explosion-proof valves are generally designed with a thinning zone, which can be achieved through machining or stamping. The thinning zone contains grooves; when the explosion-proof valve reaches the set opening pressure, the gas will rupture through these grooves, causing the valve to open. The inner side of the grooves forms a pressure relief channel, thus achieving the pressure relief function of the explosion-proof valve. However, during the machining of the thinning zone, the material used in the explosion-proof valve undergoes plastic deformation, resulting in a cooling hardening effect. This affects the development stability of the finished explosion-proof valve, reducing its reliability and safety. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion-proof valve installation structure and battery, which can minimize the cold work hardening effect during the explosion-proof valve processing, resulting in good explosion-proof valve performance, stable valve opening pressure, and high structural strength at the explosion-proof valve installation position.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, this utility model provides an explosion-proof valve installation structure, including:

[0007] Mounting plate, the mounting plate is provided with a coaxial first mounting hole and a countersunk platform, the countersunk platform is arranged in the circumferential direction at one end of the first mounting hole;

[0008] An explosion-proof valve is flat in shape. One end face of the explosion-proof valve is provided with a groove. The inner side of the groove forms a bursting part, and the outer side of the groove forms a fixing part. The fixing part is embedded in the sink.

[0009] The clamping component includes an annular portion, the inner side of which forms an exhaust channel. The annular portion presses the fixing portion against the bottom wall of the sinking platform. The annular portion and the fixing portion are welded to the side wall of the sinking platform. After the explosion-proof valve is opened, a pressure relief channel is formed at the explosion part. The exhaust channel and the pressure relief channel are sequentially connected to the first mounting hole.

[0010] Optionally, the clamping member further includes a reinforcing rib connected to the inner peripheral wall of the annular portion, the reinforcing rib dividing the exhaust channel into at least two sub-channels.

[0011] Optionally, the thickness of the reinforcing rib is less than the thickness of the annular portion, and the reinforcing rib is spaced apart from the burst portion by a preset distance h, where h ranges from 0.015mm to 0.085mm.

[0012] Optionally, the reinforcing ribs are in the form of a straight line, a cross, or a star shape.

[0013] Optionally, the thickness of the blasting part and the fixing part are equal, both being H;

[0014] The value range of H is: 0.1mm≤H≤0.5mm.

[0015] Optionally, the residual thickness at the groove is H1; the value range of H1 is: 0.03mm≤H1≤0.17mm.

[0016] Optionally, the notch is ring-shaped or C-shaped.

[0017] Optionally, the explosion-proof valve mounting structure further includes a protective film, which is affixed to the end face of the mounting plate opposite to the explosion-proof valve and covers the first mounting hole.

[0018] On the other hand, this utility model provides a battery, including a battery cover and a housing, wherein at least one of the top cover plate of the battery cover and the side wall of the housing is the mounting plate, and the mounting plate is connected to the explosion-proof valve and the clamping member using the explosion-proof valve mounting structure in any of the above-mentioned schemes.

[0019] Optionally, the top cover of the battery cover is the mounting plate, and the battery cover further includes an upper plastic part, a lower plastic part, and a terminal post. The upper plastic part and the lower plastic part are respectively disposed on both sides of the top cover, and the terminal post passes through the lower plastic part, the top cover, and the upper plastic part.

[0020] A vent hole is provided on the lower plastic part at a position opposite to the first mounting hole, and the vent hole is connected to the exhaust channel of the clamping part.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model provides an explosion-proof valve mounting structure, including a mounting plate, an explosion-proof valve, and a clamping component. The mounting plate has a coaxial first mounting hole and a countersunk platform, the countersunk platform being positioned circumferentially at one end of the first mounting hole. The annular portion of the clamping component presses the fixing portion of the explosion-proof valve against the bottom wall of the countersunk platform. The circumferential sidewalls of the annular portion and the circumferential sidewalls of the fixing portion are welded to the sidewalls of the countersunk platform, thus clamping and fixing the explosion-proof valve to the countersunk platform of the mounting plate. The explosion-proof valve is entirely flat, eliminating the need for thinning or stamping sheet metal as required in conventional explosion-proof valves. This mitigates the work-hardening effect caused by plastic deformation during processing, resulting in higher stability of the valve's opening pressure. Furthermore, the clamping component improves the structural strength of the connection between the explosion-proof valve and the mounting plate, ensuring the explosion-proof valve is reliably and stably fixed to the mounting plate.

[0023] This utility model also provides a battery, including a battery cover and a housing. At least one of the top cover plate of the battery cover and the side wall of the housing is a mounting plate. The mounting plate is connected to the explosion-proof valve and the clamping component using the aforementioned explosion-proof valve mounting structure. By adopting the aforementioned explosion-proof valve mounting structure, the work hardening effect during the explosion-proof valve manufacturing process can be minimized, resulting in good performance of the explosion-proof valve and stable valve opening pressure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the battery cover provided in Embodiment 1 of this utility model;

[0025] Figure 2 This is an exploded view of the battery cover provided in Embodiment 1 of this utility model;

[0026] Figure 3 This is a cross-sectional view of the battery cover provided in Embodiment 1 of this utility model;

[0027] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0028] Figure 5 yes Figure 3 A magnified view of a section at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the explosion-proof valve provided in Embodiment 1 of this utility model;

[0030] Figure 7 This is a top view of the explosion-proof valve provided in Embodiment 1 of this utility model;

[0031] Figure 8 This is a cross-sectional view of the explosion-proof valve provided in Embodiment 1 of this utility model;

[0032] Figure 9 This is a structural schematic diagram of the clamping component provided in Embodiment 1 of this utility model;

[0033] Figure 10 This is an exploded view of the battery provided in Embodiment 1 of this utility model.

[0034] In the picture:

[0035] 100. Battery cover plate; 110. Top cover plate; 111. First mounting hole; 112. Recessed platform; 113. Second mounting hole; 120. Upper plastic part; 121. Third mounting hole; 130. Lower plastic part; 131. Fourth mounting hole; 132. Vent hole; 140. Terminal post; 141. Plate body; 142. Post body; 150. Sealing element;

[0036] 200. Explosion-proof valve; 210. Score; 220. Explosion section; 230. Fixing section;

[0037] 300. Clamping component; 310. Annular part; 320. Reinforcing rib; 321. Horizontal rib; 322. Longitudinal rib; 330. Sub-channel; 340. Welded part;

[0038] 400, Protective film; 500, Housing; 510, Opening; 600, Bare cell; 610, Tab. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] Example 1

[0044] like Figures 1-4 As shown, this embodiment provides an explosion-proof valve mounting structure, which includes a mounting plate, an explosion-proof valve 200, and a clamping member 300. The mounting plate is the top cover plate 110 of the battery cover plate 100, and the top cover plate 110 has a coaxial first mounting hole 111 and a recessed platform 112. The recessed platform 112 is located circumferentially at one end of the first mounting hole 111. Both the explosion-proof valve 200 and the clamping member 300 are located at the recessed platform 112, which is situated on the side of the top cover plate 110 closest to the bare battery cell 600.

[0045] The explosion-proof valve 200 is generally flat. One end face of the explosion-proof valve 200 has a notch 210. The inner side of the notch 210 forms a bursting part 220, and the outer side of the notch 210 forms a fixing part 230, which is embedded in the recessed platform 112. The clamping member 300 includes an annular part 310, which presses the fixing part 230 against the bottom wall of the recessed platform 112. The peripheral sidewalls of the annular part 310 and the peripheral sidewalls of the fixing part 230 are welded to the sidewalls of the recessed platform 112, forming a welded part 340 at the weld. The explosion-proof valve 200 is pressed and fixed to the recessed platform 112 of the top cover plate 110 by the clamping member 300. The explosion-proof valve 200 in this embodiment can be formed by cutting sheet metal, and the processing only includes one step of machining the notch 210. This avoids the need for thinning or stamping sheet metal, which is required in conventional explosion-proof valves. This reduces the work-hardening effect caused by plastic deformation during processing, resulting in higher stability of the opening pressure of the explosion-proof valve 200. Furthermore, the explosion-proof valve 200 in this embodiment is thinner than conventional explosion-proof valves. The clamping member 300 can improve the structural strength of the connection between the explosion-proof valve 200 and the top cover plate 110, ensuring that the explosion-proof valve 200 is reliably and stably installed on the top cover plate 110.

[0046] Furthermore, when the explosion-proof valve 200 is opened, the groove 210 ruptures, and the ruptured part 220 forms a pressure relief channel. The inner side of the annular part 310 forms an exhaust channel. The exhaust channel, the pressure relief channel and the first mounting hole 111 are connected in sequence. Thus, the gas inside the battery can be discharged to the outside of the battery through the exhaust channel, the pressure relief channel and the first mounting hole 111, thereby avoiding the risk of explosion.

[0047] See Figure 4 and Figure 9 The clamping component 300 also includes a reinforcing rib 320, which is connected to the inner peripheral wall of the annular portion 310. The reinforcing rib 320 divides the exhaust channel into at least two sub-channels 330, which are connected to the pressure relief channel of the explosion-proof valve 200. The arrangement of the reinforcing rib 320 provides support for the explosion-proof valve 200 when the battery is evacuated, preventing the burst portion 220 of the explosion-proof valve 200 from being dented and deformed due to negative pressure, thus helping to ensure the stability of the opening pressure of the explosion-proof valve 200.

[0048] Optionally, the thickness of the reinforcing rib 320 is less than the thickness of the annular portion 310, and the end face of the reinforcing rib 320 facing away from the top cover plate 110 is flush with the end face of the annular portion 310 facing away from the top cover plate 110. A preset distance h is spaced between the end face of the reinforcing rib 320 facing the top cover plate 110 and the end face of the explosion-proof portion 220 facing away from the top cover plate 110. The value of h ranges from 0.015mm to 0.085mm. For example, the value of h can be 0.015mm, 0.020mm, 0.050mm, 0.070mm, or 0.085mm, etc. By adopting the above configuration, when the battery is not under negative pressure, there is a gap between the reinforcing rib 320 and the explosion-proof portion 220 of the explosion-proof valve 200, facilitating gas flow. Furthermore, there is no adsorption force between the reinforcing rib 320 and the explosion-proof portion 220, making it easy to open the valve and ensuring stable valve opening pressure.

[0049] For example, the reinforcing rib 320 in this embodiment is cross-shaped. The reinforcing rib 320 includes intersecting horizontal ribs 321 and vertical ribs 322. Both ends of the horizontal ribs 321 and vertical ribs 322 are connected to the inner peripheral wall of the annular portion 310, and the exhaust channel is divided into four sub-channels 330 by the horizontal ribs 321 and vertical ribs 322. Of course, in other embodiments, the reinforcing rib 320 can be set as a straight line or a star shape, etc., which will not be described in detail here.

[0050] See also Figure 4 ,as well as Figures 6-8 In this embodiment, the thickness of the blasting part 220 and the fixing part 230 is equal everywhere. That is to say, when manufacturing the explosion-proof valve 200, the main structure of the explosion-proof valve 200 can be formed by cutting the plate. Then, the finished explosion-proof valve 200 can be formed by machining the groove 210 on one side of the plate. This eliminates the stamping or machining process when making the thinning area in conventional explosion-proof valves, thereby improving the unstable opening pressure caused by cold work hardening during the processing of the explosion-proof valve 200.

[0051] Optionally, in this embodiment, the thickness of both the blasting part 220 and the fixing part 230 is H, and the value of H ranges from 0.1mm to 0.5mm. For example, the value of H can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm, etc. By adopting the above settings, the explosion-proof valve 200 itself has sufficient mechanical strength, is not easily deformed, and has high reliability. Further, in this embodiment, the residual thickness at the notch 210 of the explosion-proof valve 200 is H1, and the value of H1 ranges from 0.03mm to 0.17mm. For example, the value of H1 can be 0.03mm, 0.05mm, 0.08mm, 0.12mm, or 0.17mm, etc. By adopting the above-mentioned configuration, the notch 210 of the explosion-proof valve 200 has sufficient mechanical strength and is not easily deformed, ensuring that the notch 210 of the explosion-proof valve 200 will not break before reaching the preset opening pressure, thus ensuring the stability and reliability of the opening pressure of the explosion-proof valve 200. For example, the notch 210 in this embodiment is annular. Of course, in other embodiments, the notch 210 can also be C-shaped. In this case, at least part of the bursting part 220 and the fixing part 230 in the explosion-proof valve 200 are directly connected. After the explosion-proof valve 200 is opened (i.e., after the notch 210 breaks), the part directly connected to the bursting part 220 and the fixing part 230 will not break, thereby avoiding the risk of injury or short circuit caused by the bursting part 220 flying out.

[0052] See also Figure 2 and Figure 4 The explosion-proof valve mounting structure also includes a protective membrane 400, which is affixed to the end face of the top cover plate 110 opposite to the explosion-proof valve 200, and covers the first mounting hole 111. The protective membrane 400 provides a certain degree of protection for the explosion-proof valve 200, preventing dust, liquid, and other foreign matter from falling onto the explosion-proof valve 200 during injection or use, thus avoiding corrosion or damage. This improves the reliability of the explosion-proof valve 200 and ensures stable valve opening pressure.

[0053] See Figure 10 This embodiment provides a battery, which includes a battery cover plate 100, a housing 500 and a bare cell 600. An opening 510 is formed on one side of the housing 500, and the bare cell 600 is installed into the housing 500 through the opening 510. The top cover plate 110 of the battery cover plate 100 is connected to the end of the housing 500 with the opening 510, and the battery cover plate 100 and the housing 500 form a closed space to accommodate the bare cell 600.

[0054] The top cover plate 110 of the battery cover 100 serves as a mounting plate, and it is connected to the explosion-proof valve 200 and the clamping member 300 using the aforementioned explosion-proof valve mounting structure. By employing this structure, the work-hardening effect during the manufacturing process of the explosion-proof valve 200 can be minimized, resulting in good performance and stable opening pressure. Furthermore, the reinforcing ribs 320 of the clamping member 300 support the burst portion 220 of the explosion-proof valve 200, preventing deformation of the burst portion 220 due to negative pressure during battery vacuuming, further improving the stability of the explosion-proof valve 200's opening pressure.

[0055] See also Figure 2 and Figure 5 In this embodiment, the battery cover 100 includes an upper plastic part 120, a lower plastic part 130, and a terminal post 140. The upper plastic part 120 and the lower plastic part 130 are respectively disposed on both sides of the top cover plate 110. The terminal post 140 includes a plate portion 141 and a column portion 142 connected to each other. The column portion 142 passes through the fourth mounting hole 131 of the lower plastic part 130, the second mounting hole 113 of the top cover plate 110, and the third mounting hole 121 of the upper plastic part 120. The end of the column portion 142 near the upper plastic part 120 and the plate portion 141 clamp and fix the terminal post 140 to the top cover plate 110. The upper plastic part 120 and the lower plastic part 130 insulate the terminal post 140 from the top cover plate 110.

[0056] The battery cover 100 also includes a sealing element 150, which is sleeved on the cylindrical portion 142 of the terminal post 140. The sealing element 150 is sandwiched between the top cover plate 110 and the cylindrical portion 142 of the terminal post 140, between the upper plastic part 120 and the cylindrical portion 142 of the terminal post 140, and between the lower plastic part 130 and the plate portion 141 of the terminal post 140. The sealing element 150 seals the gaps between the top cover plate 110 and the cylindrical portion 142 of the terminal post 140, between the upper plastic part 120 and the cylindrical portion 142 of the terminal post 140, and between the lower plastic part 130 and the plate portion 141 of the terminal post 140, ensuring good sealing performance of the battery cover 100.

[0057] Optionally, in this embodiment, the battery cover 100 integrates two terminals 140, and two tabs 610 extend from the same side of the bare cell 600. One tab 610 is a positive tab, and the other tab 610 is a negative tab. The positive and negative tabs are electrically connected to one terminal 140, thereby drawing the electrical energy of the bare cell 600 out of the battery to realize the charging and discharging functions. Correspondingly, the upper plastic part 120 and the sealing part 150 are also provided with two, and the second mounting hole 113 on the top cover 110 and the fourth mounting hole 131 on the lower plastic part 130 are also provided with two.

[0058] Furthermore, a vent 132 is provided on the lower plastic part 130 at a position opposite to the first mounting hole 111, and the vent 132 is connected to the exhaust channel of the clamping part 300. Thus, when a large amount of gas is generated inside the battery, the gas can be discharged to the outside of the battery in sequence through the vent 132, the exhaust channel, the pressure relief channel, and the first mounting hole 111, ensuring a smooth pressure relief path and preventing battery explosion accidents.

[0059] Example 2

[0060] This embodiment provides a battery that differs from the battery in Embodiment 1 in that one sidewall of the battery casing 500 is a mounting plate, and this sidewall is connected to the explosion-proof valve 200 and the clamping member 300 using the aforementioned explosion-proof valve mounting structure. By employing this explosion-proof valve mounting structure, the work-hardening effect during the processing of the explosion-proof valve 200 can be minimized, resulting in good performance and stable opening pressure for the explosion-proof valve 200. Furthermore, the reinforcing ribs 320 of the clamping member 300 support the burst portion 220 of the explosion-proof valve 200, preventing deformation of the burst portion 220 due to negative pressure during battery vacuuming, further improving the stability of the opening pressure of the explosion-proof valve 200.

[0061] The remaining structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An explosion-proof valve mounting structure characterized by comprising: include: The mounting plate is provided with a coaxial first mounting hole (111) and a countersunk platform (112), and the countersunk platform (112) is arranged in the circumferential direction at one end of the first mounting hole (111); An explosion-proof valve (200) is flat. One end face of the explosion-proof valve (200) is provided with a notch (210). An explosion part (220) is formed on the inner side of the notch (210), and a fixing part (230) is formed on the outer side of the notch (210). The fixing part (230) is embedded in the sink (112). A clamping component (300) includes an annular portion (310), the inner side of which forms an exhaust channel. The annular portion (310) presses the fixing portion (230) against the bottom wall of the sinking platform (112). The annular portion (310) and the fixing portion (230) are welded to the side wall of the sinking platform (112). After the explosion-proof valve (200) is opened, a pressure relief channel is formed at the explosion part (220). The exhaust channel and the pressure relief channel are sequentially connected to the first mounting hole (111).

2. The explosion relief valve mounting structure according to claim 1, characterized by The clamping member (300) further includes a reinforcing rib (320), which is connected to the inner peripheral wall of the annular portion (310) and divides the exhaust channel into at least two sub-channels (330).

3. The explosion relief valve mounting structure according to claim 2, characterized by The thickness of the reinforcing rib (320) is less than the thickness of the annular portion (310), and the reinforcing rib (320) and the bursting portion (220) are spaced apart by a preset distance h, where h is in the range of 0.015mm≤h≤0.085mm.

4. The explosion relief valve mounting structure according to claim 2, characterized by The reinforcing ribs (320) are in the shape of a straight line, a cross, or a star.

5. The explosion relief valve mounting structure according to claim 1, characterized by The thickness of the blasting part (220) and the fixing part (230) are equal, both being H; the value range of H is: 0.1mm≤H≤0.5mm.

6. The explosion relief valve mounting structure according to claim 1, characterized by The residual thickness at the notch (210) is H1; the value range of H1 is: 0.03mm≤H1≤0.17mm.

7. The explosion relief valve mounting structure according to claim 1, characterized by The notch (210) is ring-shaped or C-shaped.

8. The explosion relief valve mounting structure according to claim 1, characterized by The explosion-proof valve mounting structure also includes a protective film (400), which is attached to the end face of the mounting plate opposite to the explosion-proof valve (200) and covers the first mounting hole (111).

9. A battery, characterized by The device includes a battery cover (100) and a housing (500), wherein at least one of the top cover plate (110) of the battery cover (100) and the side wall of the housing (500) is the mounting plate, and the mounting plate is connected to the explosion-proof valve (200) and the clamping member (300) using the explosion-proof valve mounting structure according to any one of claims 1-8.

10. The battery of claim 9, wherein, The top cover plate (110) of the battery cover plate (100) is the mounting plate. The battery cover plate (100) also includes an upper plastic part (120), a lower plastic part (130) and a terminal post (140). The upper plastic part (120) and the lower plastic part (130) are respectively disposed on both sides of the top cover plate (110). The terminal post (140) passes through the lower plastic part (130), the top cover plate (110) and the upper plastic part (120). A vent hole (132) is provided on the lower plastic part (130) at a position opposite to the first mounting hole (111), and the vent hole (132) is connected to the exhaust channel of the clamping part (300).

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