Battery pressure release valve with novel pressure release structure

Abstract

The invention relates to a battery pressure release valve with a novel pressure release structure. According to the technical scheme, the battery pressure release valve is characterized by comprising a valve body and a valve seat; an exhaust channel is arranged in the valve seat; the valve body is arranged on the valve seat; an umbrella-shaped valve core is arranged on the valve body; one end of the umbrella-shaped valve element abuts against the valve seat, the other end of the umbrella-shaped valve element abuts against the valve body, and under the condition that the umbrella-shaped valve element is in an initial state, the umbrella-shaped valve element seals the exhaust channel; compared with an original spring structure, the spring structure is easy to install and lower in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure relief valves, and more particularly to a battery pressure relief valve with a novel pressure relief structure. Background Art

[0002] With the continuous development of energy storage technology, battery packs are becoming increasingly widely used in electrical devices such as electric vehicles and portable computing devices. Battery packs contain multiple battery cells, which can experience thermal runaway due to overheating, mechanical abuse, and other conditions. This is accompanied by the release of large amounts of gas and heat. To prevent the enclosed battery case from exploding under excessive pressure, a pressure relief valve is required for active pressure relief. Based on the structural characteristics and safety requirements of the battery pack, the pressure relief valve must meet the requirements of sealing, appropriate opening pressure, and a sufficiently large pressure relief cross-section. After the pressure and exhaust of a single battery cell is completed, the pressure relief valve closes to prevent the ingress of external oxygen.

[0003] At present, battery packs usually use spring-opening pressure relief valves or ejector-type vent pressure relief valves. The vent pressure of the ejector-type vent pressure relief valve is relatively high, and the consistency of the vent pressure is poor. When the breathable membrane inside the ejector-type vent pressure relief valve ruptures, the inside and outside of the battery pack are connected, and a large amount of external oxygen enters the interior of the battery pack to participate in the reaction, causing combustion inside the battery pack again. Therefore, spring-opening pressure relief valves are mostly used. The spring-opening pressure relief valve requires that the air pressure in the battery pack be greater than the elastic force of the spring before the pressure relief function of the pressure relief valve can be opened.

[0004] Both of the aforementioned pressure relief valves are relatively complex in structure and require numerous parts, making the production and assembly process tedious, consuming significant manpower and material resources, and resulting in high costs. Therefore, designing a low-cost battery pressure relief valve with a simple structure and ease of assembly has become a pressing technical challenge for those skilled in the art. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a battery pressure relief valve with a novel pressure relief structure to solve the above technical problems.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A battery pressure relief valve with a new pressure relief structure, comprising: a valve body and a valve seat; an exhaust channel is provided in the valve seat; the valve body is provided on the valve seat; an umbrella-shaped valve core is provided on the valve body; one end of the umbrella-shaped valve core abuts the valve seat, and the other end abuts the valve body, and when the umbrella-shaped valve core is in an initial state, the umbrella-shaped valve core closes the exhaust channel.

[0007] Specifically, the umbrella-shaped valve core is made of a soft material, such as silicone, rubber, etc. In the initial state, the outer periphery of the lower end of the umbrella-shaped valve core is pressed against the valve body, and the exhaust channel connected to the battery pack is closed. When the air pressure in the battery pack is high, the gas in the exhaust channel pushes the umbrella-shaped valve core toward one side of the battery pack, causing the umbrella-shaped valve core to deform. The outer periphery of the lower end of the umbrella-shaped valve core is separated from the valve body. At this time, the exhaust channel is open, and the gas can be discharged from the battery pack through the exhaust channel. As the pressure in the battery pack decreases, when the pressure in the battery pack is not enough to push the umbrella-shaped valve core to deform, the umbrella-shaped valve core returns to its initial state and closes the exhaust channel again, isolating the inside of the battery pack from the outside world. The present application replaces the original spring structure with an umbrella-shaped valve core. During installation, it is only necessary to press the umbrella-shaped valve core against the valve seat so that the umbrella-shaped valve core closes the exhaust channel of the valve seat, and then press the valve body against the valve seat to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, the installation is simpler and the cost is lower.

[0008] Optionally, the valve seat includes a fixed seat and a connecting bracket; the valve body is arranged on the fixed seat, a through hole is opened on the fixed seat, the connecting bracket is arranged on the fixed seat and is located at the opening of the through hole, and the gap between the through hole and the connecting bracket constitutes the exhaust channel; one end of the umbrella-shaped valve core abuts against the connecting bracket.

[0009] Specifically, the umbrella-shaped valve core is arranged on the connecting bracket and located at the center of the through hole to ensure that the air pressure passing through the through hole can be evenly applied to the lower end of the umbrella-shaped valve core. When the umbrella-shaped valve core is in the initial state, the umbrella-shaped valve core closes the opening of the through hole, thereby closing the exhaust channel.

[0010] Optionally, a stepped groove is provided on the fixing seat; the stepped groove is communicated with the through hole; when the umbrella-shaped valve core is in an initial state, the umbrella-shaped valve core overlaps the inner wall of the stepped groove.

[0011] Specifically, by setting a stepped groove so that the outer periphery of the lower end of the umbrella-shaped valve core overlaps one of the steps of the stepped groove, the output area of the through hole can be expanded so that the gas in the through hole can quickly escape from the lower end opening of the umbrella-shaped valve core when the umbrella-shaped valve core is opened.

[0012] Optionally, the valve body includes a valve cover; a connecting seat is provided on the valve cover; a mounting hole is provided on the connecting bracket; the connecting seat is inserted into the mounting hole, one end of the umbrella-shaped valve core abuts against the connecting bracket, and the other end abuts against the connecting seat.

[0013] Specifically, the mounting hole is provided on the connecting bracket and is located at the center of the through hole, so that the through hole, the umbrella-shaped valve core and the connecting seat are at the same center. During assembly, the umbrella-shaped valve core is placed at the center of the connecting bracket. The middle part of the umbrella-shaped valve core has an opening corresponding to the connecting seat. The connecting seat is passed through the opening of the umbrella-shaped valve core and the mounting hole in sequence to fix the umbrella-shaped valve core between the connecting seat and the connecting bracket.

[0014] Optionally, an air outlet hole communicating with the through hole is provided on the connecting seat, and an exhaust gap is provided between the connecting seat and the valve cover.

[0015] Specifically, when the battery pack is operating normally, a small amount of gas will be generated inside the battery pack. Since a small amount of gas is difficult to push open the umbrella-shaped valve core, in order to avoid excessive gas accumulation during the normal operation of the battery pack, an air outlet is provided on the connecting seat, and an exhaust gap is provided between the connecting seat and the valve cover. At this time, a small amount of gas can be directly discharged to the outside through the air outlet and the exhaust gap.

[0016] Optionally, a waterproof and breathable membrane is provided on the connecting seat.

[0017] By providing a waterproof and breathable membrane, the vent holes can be covered to prevent external water vapor from entering the battery pack through the vent holes.

[0018] Optionally, a plurality of mounting blocks are provided on the valve seat; the upper end of the mounting block abuts against the lower end of the connecting seat, an engaging groove is provided on the mounting block, and a buckle is provided on the valve cover, and the buckle is engaged with the engaging groove.

[0019] Specifically, during assembly, after the connecting seat is inserted into the mounting hole, the bottom end of the connecting seat contacts the top end of the mounting block, and the mounting block supports the outer edge of the connecting seat. The valve cover is then buckled onto the valve seat, and the buckle is snapped into the fitting groove. At this time, there is a gap between the valve cover and the valve seat for gas to pass through, and the gap is connected to the exhaust channel.

[0020] Optionally, a vent hole is provided on the valve cover, and a fitting block is provided on the connecting seat; the fitting block is fitted into the vent hole; and the exhaust gap is connected to the vent hole.

[0021] Specifically, during assembly, when the valve cover is fastened to the valve seat, the interlocking block is embedded in the vent. At this time, there is a gap between the interlocking block and the vent, which is connected to the exhaust gap, and the gap is above the water retaining flange. The small amount of gas generated by the battery pack can be directly discharged to the outside through the vent, exhaust gap and gap, and can also be discharged to the outside through the exhaust gap and gap.

[0022] Optionally, a sealing ring is provided at the lower end of the valve seat.

[0023] Specifically, since the lower end of the valve seat is fixed to the battery pack, a sealing ring is provided at the lower end of the valve seat to seal the connection between the valve seat and the battery pack, thereby preventing outside air from entering the battery pack from the connection between the valve seat and the battery pack.

[0024] Optionally, a water retaining flange is provided on the valve seat.

[0025] Specifically, the water retaining flange is in the shape of a ring with an inner side height higher than an outer side height, which can prevent external liquid from entering the stepped groove through the gap between the valve cover and the valve seat.

[0026] In summary, the present invention has the following beneficial effects:

[0027] When the umbrella-shaped valve core is in its initial state, the outer periphery of the lower end of the umbrella-shaped valve core presses against the valve body and closes the exhaust channel connected to the battery pack. When the air pressure in the battery pack is high, the gas in the exhaust channel pushes the umbrella-shaped valve core toward one side of the battery pack, causing the umbrella-shaped valve core to deform. The outer periphery of the lower end of the umbrella-shaped valve core separates from the valve body. At this time, the exhaust channel is open, and the gas can be discharged from the battery pack through the exhaust channel. As the pressure in the battery pack drops, when the pressure in the battery pack is not enough to push the umbrella-shaped valve core to deform, the umbrella-shaped valve core returns to its initial state and closes the exhaust channel again, isolating the inside of the battery pack from the outside world. The present application replaces the original spring structure with an umbrella-shaped valve core. During installation, it is only necessary to press the umbrella-shaped valve core against the valve seat so that the umbrella-shaped valve core closes the exhaust channel of the valve seat, and then press the valve body against the valve seat to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, it is simple to install and has lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a schematic cross-sectional view of a battery pressure relief valve according to the first embodiment of the present invention;

[0029] Figure 2 1 is a schematic cross-sectional view of another battery pressure relief valve according to the first embodiment of the present invention;

[0030] Figure 3 This is a schematic cross-sectional view of a battery pressure relief valve in a second embodiment of the present invention;

[0031] Figure 4 is a schematic cross-sectional view of another battery pressure relief valve in the second embodiment of the present invention;

[0032] Figure 5 1 is a schematic diagram of the overall structure of a battery pressure relief valve in a third embodiment of the present invention;

[0033] Figure 6 is a schematic cross-sectional structural diagram of a battery pressure relief valve in a third embodiment of the present invention;

[0034] Figure 7Schematic diagram of the explosion structure of the battery pressure relief valve in the third embodiment of the present invention;

[0035] Figure 8 1 is a schematic diagram of the overall structure of a battery pressure relief valve in a fourth embodiment of the present invention;

[0036] Figure 9 is a schematic cross-sectional structural diagram of a battery pressure relief valve in a fourth embodiment of the present invention;

[0037] Figure 10 Schematic diagram of the explosion structure of the battery pressure relief valve in the fourth embodiment of the present invention.

[0038] In the figure: 1. Valve body; 101. Valve cover; 102. Connecting seat; 2. Valve seat; 21. Fixed seat; 22. Connecting bracket; 3. Exhaust channel; 4. Umbrella-shaped valve core; 5. Through hole; 6. Step groove; 7. Mounting hole; 8. Air outlet; 9. Exhaust gap; 10. Waterproof breathable membrane; 11. Sealing ring; 12. Mounting block; 13. Fitting groove; 14. Buckle; 15. Water retaining flange; 16. Vent; 17. Fitting block. DETAILED DESCRIPTION

[0039] To make the objectives, features, and advantages of the present invention more readily apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

[0040] In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0041] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] This embodiment provides a battery pressure relief valve with a new pressure relief structure, such as Figure 1 and Figure 2As shown, it includes: a valve body 1 and a valve seat 2; an exhaust channel 3 is provided in the valve seat 2; the valve body 1 is arranged on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2, and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust channel 3.

[0044] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone, rubber, etc. In its initial state, the outer periphery of the lower end of the umbrella-shaped valve core 4 is pressed against the valve body 1, thereby sealing the exhaust channel 3 connected to the battery pack. When the air pressure in the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 toward one side of the battery pack, causing the umbrella-shaped valve core 4 to deform and the outer periphery of the lower end of the umbrella-shaped valve core 4 to separate from the valve body 1. At this time, the exhaust channel 3 is open, and the gas can be discharged from the battery pack through the exhaust channel 3. As the pressure in the battery pack drops, when the pressure in the battery pack is insufficient to push the umbrella-shaped valve core 4 to deform, the umbrella-shaped valve core 4 returns to its initial state and seals the exhaust channel 3 again, isolating the interior of the battery pack from the outside world. The present application replaces the original spring structure by providing an umbrella-shaped valve core 4. During installation, it is only necessary to press the umbrella-shaped valve core 4 against the valve seat 2 so that the umbrella-shaped valve core 4 closes the exhaust channel 3 of the valve seat 2, and then press the valve body 1 against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, it is simple to install and has lower cost.

[0045] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is arranged on the fixed seat 21, a through hole 5 is opened on the fixed seat 21, the connecting bracket 22 is arranged on the fixed seat 21 and is located at the opening of the through hole 5, and the gap between the through hole 5 and the connecting bracket 22 constitutes an exhaust channel 3; the umbrella-shaped valve core 4 is arranged on the connecting bracket 22.

[0046] Specifically, the umbrella-shaped valve core 4 is arranged on the connecting bracket 22 and is located at the center of the through hole 5 to ensure that the air pressure passing through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0047] Optionally, the valve body 1 includes a valve cover 101, which abuts the upper end of the umbrella-shaped valve core 4. A plurality of air holes are provided on the outer wall of the valve seat 2. When the air pressure in the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 toward one side of the battery pack, causing the umbrella-shaped valve core 4 to deform and separate the lower periphery of the umbrella-shaped valve core 4 from the valve body 1. At this time, the exhaust channel 3 is open, and the gas can be discharged from the battery pack through the exhaust channel 3 and the air holes.

[0048] Example 2

[0049] This embodiment provides a battery pressure relief valve with a new pressure relief structure, such as Figure 3 and Figure 4 As shown, it includes: a valve body 1 and a valve seat 2; an exhaust channel 3 is provided in the valve seat 2; the valve body 1 is arranged on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2, and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust channel 3.

[0050] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone, rubber, etc. In its initial state, the outer periphery of the lower end of the umbrella-shaped valve core 4 is pressed against the valve body 1, thereby sealing the exhaust channel 3 connected to the battery pack. When the air pressure in the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 toward one side of the battery pack, causing the umbrella-shaped valve core 4 to deform and the outer periphery of the lower end of the umbrella-shaped valve core 4 to separate from the valve body 1. At this time, the exhaust channel 3 is open, and the gas can be discharged from the battery pack through the exhaust channel 3. As the pressure in the battery pack drops, when the pressure in the battery pack is insufficient to push the umbrella-shaped valve core 4 to deform, the umbrella-shaped valve core 4 returns to its initial state and seals the exhaust channel 3 again, isolating the interior of the battery pack from the outside world. The present application replaces the original spring structure by providing an umbrella-shaped valve core 4. During installation, it is only necessary to press the umbrella-shaped valve core 4 against the valve seat 2 so that the umbrella-shaped valve core 4 closes the exhaust channel 3 of the valve seat 2, and then press the valve body 1 against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, it is simple to install and has lower cost.

[0051] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is arranged on the fixed seat 21, a through hole 5 is opened on the fixed seat 21, the connecting bracket 22 is arranged on the fixed seat 21 and is located at the opening of the through hole 5, and the gap between the through hole 5 and the connecting bracket 22 constitutes an exhaust channel 3; the umbrella-shaped valve core 4 is arranged on the connecting bracket 22.

[0052] Specifically, the umbrella-shaped valve core 4 is arranged on the connecting bracket 22 and is located at the center of the through hole 5 to ensure that the air pressure passing through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0053] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, and one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0054] Specifically, the mounting hole 7 is provided on the connecting bracket 22 and is located at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4 and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. An exhaust hole is provided in the middle of the umbrella-shaped valve core 4, an air outlet hole 8 connected to the exhaust hole is provided on the connecting seat 102, and a ventilation gap is provided on the valve cover 101. When the battery pack is operating normally, a small amount of gas will be generated in the battery pack. Since a small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid excessive gas accumulation during the normal operation of the battery pack, an exhaust hole is provided in the middle of the umbrella-shaped valve core 4, an air outlet hole 8 connected to the exhaust hole is provided on the connecting seat 102, and a ventilation gap is provided on the valve cover 101. At this time, a small amount of gas can be directly discharged to the outside through the exhaust hole, the air outlet hole 8 and the ventilation gap. Among them, a waterproof and breathable membrane 10 is also provided on the connecting seat 102.

[0055] Example 3

[0056] This embodiment provides a battery pressure relief valve with a new pressure relief structure, such as Figure 5-Figure 7 As shown, it includes: a valve body 1 and a valve seat 2; an exhaust channel 3 is provided in the valve seat 2; the valve body 1 is arranged on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2, and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust channel 3.

[0057] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone, rubber, etc. In its initial state, the outer periphery of the lower end of the umbrella-shaped valve core 4 is pressed against the valve body 1, thereby sealing the exhaust channel 3 connected to the battery pack. When the air pressure in the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 toward one side of the battery pack, causing the umbrella-shaped valve core 4 to deform and the outer periphery of the lower end of the umbrella-shaped valve core 4 to separate from the valve body 1. At this time, the exhaust channel 3 is open, and the gas can be discharged from the battery pack through the exhaust channel 3. As the pressure in the battery pack drops, when the pressure in the battery pack is insufficient to push the umbrella-shaped valve core 4 to deform, the umbrella-shaped valve core 4 returns to its initial state and seals the exhaust channel 3 again, isolating the interior of the battery pack from the outside world. The present application replaces the original spring structure by providing an umbrella-shaped valve core 4. During installation, it is only necessary to press the umbrella-shaped valve core 4 against the valve seat 2 so that the umbrella-shaped valve core 4 closes the exhaust channel 3 of the valve seat 2, and then press the valve body 1 against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, it is simple to install and has lower cost.

[0058] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is arranged on the fixed seat 21, a through hole 5 is opened on the fixed seat 21, the connecting bracket 22 is arranged on the fixed seat 21 and is located at the opening of the through hole 5, and the gap between the through hole 5 and the connecting bracket 22 constitutes an exhaust channel 3; the umbrella-shaped valve core 4 is arranged on the connecting bracket 22.

[0059] Specifically, the umbrella-shaped valve core 4 is arranged on the connecting bracket 22 and is located at the center of the through hole 5 to ensure that the air pressure passing through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0060] Optionally, a stepped groove 6 is provided on the fixing seat 21 ; the stepped groove 6 is communicated with the through hole 5 ; when the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 overlaps the inner wall of the stepped groove 6 .

[0061] Specifically, by setting the stepped groove 6, the outer periphery of the lower end of the umbrella-shaped valve core 4 is overlapped on one of the steps of the stepped groove 6, which can expand the output area of the through hole 5 so that the gas in the through hole 5 can quickly escape from the lower end opening of the umbrella-shaped valve core 4 when the umbrella-shaped valve core 4 is opened.

[0062] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, and one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0063] Specifically, the mounting hole 7 is provided on the connecting bracket 22 and is located at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4 and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. The middle part of the umbrella-shaped valve core 4 has an opening corresponding to the connecting seat 102. The connecting seat 102 is passed through the opening of the umbrella-shaped valve core 4 and the mounting hole 7 in sequence, and the umbrella-shaped valve core 4 can be fixed between the connecting seat 102 and the connecting bracket 22.

[0064] Optionally, an air outlet 8 communicating with the through hole 5 is provided on the connecting seat 102 , and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101 .

[0065] Specifically, when the battery pack is operating normally, a small amount of gas will be generated in the battery pack. Since a small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid excessive gas accumulation during the normal operation of the battery pack, an air outlet 8 is provided on the connecting seat 102, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101. At this time, a small amount of gas can be directly discharged to the outside through the air outlet 8 and the exhaust gap 9.

[0066] Optionally, a waterproof and breathable membrane 10 is provided on the connecting seat 102 .

[0067] By providing the waterproof breathable membrane 10 , the vent 8 can be covered to prevent external moisture from entering the battery pack through the vent 8 .

[0068] Optionally, a sealing ring 11 is provided at the lower end of the valve seat 2 .

[0069] Specifically, since the lower end of the valve seat 2 is fixed to the battery pack, a sealing ring 11 is provided at the lower end of the valve seat 2 to seal the connection between the valve seat 2 and the battery pack, thereby preventing outside air from entering the battery pack from the connection between the valve seat 2 and the battery pack.

[0070] Optionally, a plurality of mounting blocks 12 are provided on the valve seat 2; the upper end of the mounting block 12 abuts against the lower end of the connecting seat 102, an engaging groove 13 is provided on the mounting block 12, and a buckle 14 is provided on the valve cover 101, and the buckle 14 is engaged with the engaging groove 13.

[0071] Specifically, during assembly, after the connecting seat 102 is inserted into the mounting hole 7, the bottom end of the connecting seat 102 contacts the top end of the mounting block 12, and the outer edge of the connecting seat 102 is supported by the mounting block 12. Then the valve cover 101 is buckled onto the valve seat 2, and the buckle 14 is snapped into the fitting groove 13. At this time, there is a gap between the valve cover 101 and the valve seat 2 for gas to pass through, and the gap is connected to the exhaust channel 3.

[0072] Optionally, a water retaining flange 15 is provided on the valve seat 2 .

[0073] Specifically, the water retaining flange 15 is in the shape of a ring with an inner side height higher than an outer side height, and can prevent external liquid from entering the stepped groove 6 from the gap between the valve cover 101 and the valve seat 2 .

[0074] Example 4

[0075] This embodiment provides a battery pressure relief valve with a new pressure relief structure, such as Figures 8-10 As shown, it includes: a valve body 1 and a valve seat 2; an exhaust channel 3 is provided in the valve seat 2; the valve body 1 is arranged on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2, and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust channel 3.

[0076] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone, rubber, etc. In its initial state, the outer periphery of the lower end of the umbrella-shaped valve core 4 is pressed against the valve body 1, thereby sealing the exhaust channel 3 connected to the battery pack. When the air pressure in the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 toward one side of the battery pack, causing the umbrella-shaped valve core 4 to deform and the outer periphery of the lower end of the umbrella-shaped valve core 4 to separate from the valve body 1. At this time, the exhaust channel 3 is open, and the gas can be discharged from the battery pack through the exhaust channel 3. As the pressure in the battery pack drops, when the pressure in the battery pack is insufficient to push the umbrella-shaped valve core 4 to deform, the umbrella-shaped valve core 4 returns to its initial state and seals the exhaust channel 3 again, isolating the interior of the battery pack from the outside world. The present application replaces the original spring structure by providing an umbrella-shaped valve core 4. During installation, it is only necessary to press the umbrella-shaped valve core 4 against the valve seat 2 so that the umbrella-shaped valve core 4 closes the exhaust channel 3 of the valve seat 2, and then press the valve body 1 against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the pressure relief valve with the original spring structure, it is simple to install and has lower cost.

[0077] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is arranged on the fixed seat 21, a through hole 5 is opened on the fixed seat 21, the connecting bracket 22 is arranged on the fixed seat 21 and is located at the opening of the through hole 5, and the gap between the through hole 5 and the connecting bracket 22 constitutes an exhaust channel 3; the umbrella-shaped valve core 4 is arranged on the connecting bracket 22.

[0078] Specifically, the umbrella-shaped valve core 4 is arranged on the connecting bracket 22 and is located at the center of the through hole 5 to ensure that the air pressure passing through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0079] Optionally, a stepped groove 6 is provided on the fixing seat 21 ; the stepped groove 6 is communicated with the through hole 5 ; when the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 overlaps the inner wall of the stepped groove 6 .

[0080] Specifically, by setting the stepped groove 6, the outer periphery of the lower end of the umbrella-shaped valve core 4 is overlapped on one of the steps of the stepped groove 6, which can expand the output area of the through hole 5 so that the gas in the through hole 5 can quickly escape from the lower end opening of the umbrella-shaped valve core 4 when the umbrella-shaped valve core 4 is opened.

[0081] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, and one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0082] Specifically, the mounting hole 7 is provided on the connecting bracket 22 and is located at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4 and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. The middle part of the umbrella-shaped valve core 4 has an opening corresponding to the connecting seat 102. The connecting seat 102 is passed through the opening of the umbrella-shaped valve core 4 and the mounting hole 7 in sequence, and the umbrella-shaped valve core 4 can be fixed between the connecting seat 102 and the connecting bracket 22.

[0083] Optionally, an air outlet 8 communicating with the through hole 5 is provided on the connecting seat 102 , and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101 .

[0084] Specifically, when the battery pack is operating normally, a small amount of gas will be generated in the battery pack. Since a small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid excessive gas accumulation during the normal operation of the battery pack, an air outlet 8 is provided on the connecting seat 102, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101. At this time, a small amount of gas can be directly discharged to the outside through the air outlet 8 and the exhaust gap 9.

[0085] Optionally, a waterproof and breathable membrane 10 is provided on the connecting seat 102 .

[0086] By providing the waterproof breathable membrane 10 , the vent 8 can be covered to prevent external moisture from entering the battery pack through the vent 8 .

[0087] Optionally, a sealing ring 11 is provided at the lower end of the valve seat 2 .

[0088] Specifically, since the lower end of the valve seat 2 is fixed to the battery pack, a sealing ring 11 is provided at the lower end of the valve seat 2 to seal the connection between the valve seat 2 and the battery pack, thereby preventing outside air from entering the battery pack from the connection between the valve seat 2 and the battery pack.

[0089] Optionally, a plurality of mounting blocks 12 are provided on the valve seat 2; the upper end of the mounting block 12 abuts against the lower end of the connecting seat 102, an engaging groove 13 is provided on the mounting block 12, and a buckle 14 is provided on the valve cover 101, and the buckle 14 is engaged with the engaging groove 13.

[0090] Specifically, during assembly, after the connecting seat 102 is inserted into the mounting hole 7, the bottom end of the connecting seat 102 contacts the top end of the mounting block 12, and the outer edge of the connecting seat 102 is supported by the mounting block 12. Then the valve cover 101 is buckled onto the valve seat 2, and the buckle 14 is snapped into the fitting groove 13. At this time, there is a gap between the valve cover 101 and the valve seat 2 for gas to pass through, and the gap is connected to the exhaust channel 3.

[0091] Optionally, a water retaining flange 15 is provided on the valve seat 2 .

[0092] Specifically, the water retaining flange 15 is in the shape of a ring with an inner side height higher than an outer side height, and can prevent external liquid from entering the stepped groove 6 from the gap between the valve cover 101 and the valve seat 2 .

[0093] Optionally, a vent hole 16 is provided on the valve cover 101 , and a fitting block 17 is provided on the connecting seat 102 ; the fitting block 17 is fitted into the vent hole 16 ; and the exhaust gap 9 is communicated with the vent hole 16 .

[0094] Specifically, during assembly, when the valve cover 101 is fastened to the valve seat 2, the interlocking block 17 is embedded in the vent 16. At this time, there is a gap between the interlocking block 17 and the vent 16. The gap is connected to the exhaust gap 9, and the gap is above the water retaining flange 15. The small amount of gas generated by the battery pack can be directly discharged to the outside through the vent 8, the exhaust gap 9 and the gap, and can also be discharged to the outside through the exhaust gap 9 and the gap.

[0095] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A battery pressure relief valve with a new pressure relief structure, characterized in that: include: A valve body and a valve seat; an exhaust channel is provided in the valve seat; the valve body is provided on the valve seat; an umbrella-shaped valve core is provided on the valve body; one end of the umbrella-shaped valve core abuts the valve seat, and the other end abuts the valve body, and when the umbrella-shaped valve core is in an initial state, the umbrella-shaped valve core closes the exhaust channel.

2. A battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that: The valve seat includes a fixed seat and a connecting bracket; the valve body is arranged on the fixed seat, a through hole is opened on the fixed seat, the connecting bracket is arranged on the fixed seat and is located at the opening of the through hole, and the gap between the through hole and the connecting bracket constitutes the exhaust channel; one end of the umbrella-shaped valve core abuts against the connecting bracket.

3. A battery pressure relief valve with a novel pressure relief structure according to claim 2, characterized in that: The fixing seat is provided with a stepped groove; the stepped groove is communicated with the through hole; when the umbrella-shaped valve core is in an initial state, the umbrella-shaped valve core overlaps the inner wall of the stepped groove.

4. A battery pressure relief valve with a novel pressure relief structure according to claim 2, characterized in that: The valve body includes a valve cover; a connecting seat is provided on the valve cover; a mounting hole is provided on the connecting bracket; the connecting seat is inserted into the mounting hole, one end of the umbrella-shaped valve core abuts against the connecting bracket, and the other end abuts against the connecting seat.

5. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that: An air outlet hole communicating with the through hole is provided on the connecting seat, and an exhaust gap is provided between the connecting seat and the valve cover.

6. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that: A waterproof and breathable membrane is provided on the connecting seat.

7. The battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that: A plurality of mounting blocks are provided on the valve seat; the upper ends of the mounting blocks abut against the lower ends of the connecting seat; an engaging groove is provided on the mounting blocks; a buckle is provided on the valve cover, and the buckle is engaged with the engaging groove.

8. The battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that: A vent hole is provided on the valve cover, and a fitting block is provided on the connecting seat; the fitting block is fitted into the vent hole; and the exhaust gap is communicated with the vent hole.

9. The battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that: A sealing ring is provided at the lower end of the valve seat.

10. The battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that: A water retaining flange is provided on the valve seat.

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