CN219917473U - Gas regulating valve and battery - Google Patents
Gas regulating valve and battery Download PDFInfo
- Publication number
- CN219917473U CN219917473U CN202321473625.0U CN202321473625U CN219917473U CN 219917473 U CN219917473 U CN 219917473U CN 202321473625 U CN202321473625 U CN 202321473625U CN 219917473 U CN219917473 U CN 219917473U
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- vent hole
- regulating valve
- gas regulating
- accommodating cavity
- diaphragm
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 63
- 238000009423 ventilation Methods 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 28
- 230000004308 accommodation Effects 0.000 claims 5
- 230000008859 change Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 25
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000010261 cell growth Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a gas regulating valve and a battery, wherein the gas regulating valve comprises a base, and a first accommodating cavity and a first vent hole which are connected in a penetrating way are arranged in the base; the fixing piece is positioned in the first accommodating cavity and is internally provided with at least one second ventilation hole; the first vent hole, the first accommodating cavity and the second vent hole are communicated, and the first vent hole and the second vent hole are positioned at two ends of the first accommodating cavity; an elastic piece positioned in the first accommodating cavity; a diaphragm positioned between the elastic member and the first vent hole or between the elastic member and the second vent hole; according to the utility model, the diaphragm is arranged on the gas flow path, and the diaphragm is opened and closed on the gas flow path through the change of the internal pressure acting on the two sides of the diaphragm and the elastic force of the elastic piece, so that the purpose of normally closing or exhausting and decompressing the gas regulating valve is achieved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a gas regulating valve and a battery.
Background
With the continuous development of lithium ion batteries, safety is also receiving more and more social attention. The lithium ion battery is used as the core of the new energy era and has the advantages of high energy, high battery voltage, wide working temperature range, long storage life and the like.
But the cell can generate gas in the cell during use, so that the cell expands. The generation of expansion force can bring serious harm to the battery cell and the module. For the battery cell, the internal pressure of the battery cell is increased, the performance and the service life of the battery cell can be attenuated, and the battery shell is seriously broken and exploded; for modules, if the expansion force is not properly handled, the module size is out of tolerance and even the structural frame is destroyed.
In summary, the present utility model provides a gas regulating valve and a battery to solve the problem of cell expansion caused by gas generation in the cell.
Disclosure of Invention
The embodiment of the utility model provides a gas regulating valve and a battery, which can improve the technical problem of cell expansion caused by gas generation in a cell.
In one aspect, embodiments of the present utility model provide a gas regulating valve for battery protection, comprising:
the base is internally provided with a first accommodating cavity and a first vent hole which are connected in a penetrating way;
the fixing piece is positioned in the first accommodating cavity, and at least one second ventilation hole is formed in the fixing piece;
the first vent hole, the first accommodating cavity and the second vent hole are communicated, and the first vent hole and the second vent hole are positioned at two ends of the first accommodating cavity;
an elastic piece positioned in the first accommodating cavity;
and the diaphragm is positioned between the elastic piece and the first vent hole or between the elastic piece and the second vent hole.
In an embodiment, the membrane is bowl-shaped and comprises a main body part positioned in the central area of the membrane and a connecting part positioned at the periphery of the main body part, wherein the thickness of the main body part is larger than that of the connecting part.
In an embodiment, a second accommodating cavity is arranged in the fixing piece, the elastic piece is positioned in the second accommodating cavity, and the first vent hole, the second accommodating cavity and the first vent hole are communicated; the main body part is located between the elastic piece and the first vent hole, and the connecting part is in sealing connection with the bottom of the second accommodating cavity.
In an embodiment, the bottom of the second accommodating cavity is provided with a ventilation groove in a surrounding manner, and the ventilation groove is at least located in a sealing range between the bottom of the first accommodating cavity and the connecting portion.
In an embodiment, a third vent is provided at a bonding interface of the holder and the base.
In an embodiment, the holding member is located at an end of the first accommodating cavity away from the first vent hole, the elastic member is located above the holding member, the main body portion is located between the elastic member and the second vent hole, an intra-cavity sealing portion engaged with the connecting portion is disposed in the first accommodating cavity, and the connecting portion is in sealing connection with the intra-cavity sealing portion.
In an embodiment, the sealing part is provided with a vent groove in a surrounding mode, and the vent groove is at least located in the sealing range of the sealing part and the connecting part.
In another aspect, embodiments of the present utility model provide a battery comprising a gas regulating valve as described in any of the embodiments above, and a housing, a cell, and a cap assembly; the battery cell is arranged in the shell; the top cover assembly is arranged at the opening end of the shell.
In one embodiment, the post of the cap assembly forms the base of the gas regulating valve.
In one embodiment, the gas regulating valve is disposed on a top cover sheet of the top cover assembly; or, the gas regulating valve is provided on the housing.
The embodiment of the utility model has the beneficial effects that: the utility model provides a gas regulating valve and a battery, wherein the gas regulating valve comprises a base, and a first accommodating cavity and a first vent hole which are connected in a penetrating way are arranged in the base; the fixing piece is positioned in the first accommodating cavity and is internally provided with at least one second ventilation hole; the first vent hole, the first accommodating cavity and the second vent hole are communicated, and the first vent hole and the second vent hole are positioned at two ends of the first accommodating cavity; an elastic piece positioned in the first accommodating cavity; a diaphragm positioned between the elastic member and the first vent hole or between the elastic member and the second vent hole; according to the utility model, the diaphragm is arranged at one end, close to the inside of the battery cell, of the gas flow path, and the opening and closing of the gas flow path by the diaphragm are realized through the change of the internal pressure and the elastic force of the elastic piece acting on the two sides of the diaphragm, so that the purpose of normally closing or exhausting and decompressing the gas regulating valve is achieved, and the electrical property and the safety property of the battery cell are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1A is an exploded view of a three-dimensional structure of a gas regulating valve according to an embodiment of the present utility model;
FIG. 1B is a schematic cross-sectional view of a gas regulating valve according to an embodiment of the present utility model;
FIG. 1C is a schematic diagram showing the stress on a diaphragm of a gas regulating valve according to an embodiment of the present utility model
FIG. 1D is a schematic diagram of a gas flow path for a gas regulator valve for venting pressure in accordance with a first embodiment of the present utility model;
fig. 2A and 2B are schematic perspective views of a holder according to a first embodiment of the present utility model;
FIG. 2C is a schematic cross-sectional view of a retainer according to an embodiment of the utility model;
FIG. 2D is a bottom view of a holder according to an embodiment of the present utility model;
FIGS. 3A and 3B are schematic perspective views of a membrane according to an embodiment of the present utility model;
FIG. 3C is a front view of a diaphragm provided by an embodiment of the present utility model;
fig. 4A is a schematic perspective view of a gas regulating valve according to a second embodiment of the present utility model;
fig. 4B is an exploded view of a three-dimensional structure of a gas regulating valve provided in the second embodiment of the present utility model;
FIG. 4C is a schematic cross-sectional view of a gas regulating valve according to a second embodiment of the present utility model;
FIG. 5A is an exploded view of a gas regulating valve provided as a separate component in accordance with other embodiments of the present utility model;
FIG. 5B is a cross-sectional view of a gas regulating valve provided as a separate component in accordance with other embodiments of the present utility model;
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features.
The utility model provides a battery, which comprises a shell, an electric core, a top cover assembly and a gas regulating valve 100, wherein the electric core is arranged in the shell, and the top cover assembly is arranged at the opening end of the shell.
As shown in fig. 1A to 5B, the gas regulating valve 100 of the present utility model includes a base 10, wherein a first accommodating chamber 11 and a first vent hole 12 are provided in the base 10 and connected to each other through a penetration; the retaining piece 20 is positioned in the first accommodating cavity 11, and at least one second ventilation hole 21 is arranged in the retaining piece 20; the first vent hole 12, the first accommodating cavity 11 and the second vent hole 21 are communicated, and the first vent hole 12 and the second vent hole 21 are positioned at two ends of the first accommodating cavity 11; an elastic member 30 located in the first accommodating chamber 11; a diaphragm 40 positioned between the elastic member 30 and the first ventilation hole 12 or between the elastic member 30 and the second ventilation hole 21.
The first vent hole 12, the first accommodating chamber 11, and the second vent hole 21 form a gas flow path, and when the gas pressure in the cell is too high, a part of the gas is transferred to the outside of the cell through the gas flow path, so that the internal pressure is reduced; according to the utility model, the diaphragm 40 is arranged at one end, close to the inside of the battery cell, of the gas flow path, and the diaphragm 40 is opened and closed on the gas flow path through the change of the internal pressure acting on two sides of the diaphragm 40 and the elasticity of the elastic piece 30, so that the purpose of normally closing or exhausting and decompressing the gas regulating valve 100 is achieved, on one hand, the pressure level inside the battery cell can be maintained, the electrical property and the safety performance of the battery cell are improved, and the service life attenuation of the battery cell is slowed down; on the other hand, the structural strength and the safety performance of the module can be effectively improved while the small change of the internal and external shapes and the sizes of the whole life cycle of the battery cell is ensured.
The present utility model is developed in detail from the above by the following examples.
In the first embodiment, the gas regulating valve 100 is integrated with the pole of the top cover assembly, so that the gas regulating valve 100 does not occupy other space of the battery, the external dimension of the battery core is not significantly changed compared with the dimension of the battery core in the related art, and meanwhile, the structural arrangement connected with the module end does not need to be changed, and the space of the module end is not occupied.
Specifically, as shown in fig. 1A to 2D, in this embodiment, the post of the top cover assembly forms the base 10 of the gas regulating valve 100, a first accommodating cavity 11 and a first vent hole 12 that are connected in a penetrating manner are disposed in the base 10, the inner diameter of the first accommodating cavity 11 is significantly larger than the inner diameter of the first vent hole 12, and the first vent hole 12 is connected with the inside of the battery cell. The retaining piece 20 is located in the first accommodating cavity 11, and the retaining piece 20 is fixedly connected with the base 10. It should be noted that the connection manner includes, but is not limited to, welding connection or threaded connection, and in other embodiments, the holder and the base may be integrally formed, which is not limited in particular by the present utility model. The holder 20 is provided therein with a second accommodating chamber 22 and a second vent hole 21 which are connected through, and the second vent hole 21 is connected to the outside of the battery cell. The first vent hole 12, the second accommodating cavity 22 and the second vent hole 21 are communicated, and the first vent hole 12 and the second vent hole 21 are positioned at two ends of the first accommodating cavity 11. And an elastic member 30 located in the second accommodating cavity 22, wherein the elastic member 30 includes, but is not limited to, a metal spring, a shrapnel structure or a damper with other structures. A diaphragm 40 is positioned between the elastic member 30 and the first vent hole 12. The bottom of the second receiving chamber 22 is hermetically connected to the peripheral region of the diaphragm 40.
As shown in fig. 1C, since the cell generates gas in the cell during use, the pressure in the cell is continuously increased due to the accumulation of gas, and the pressure applies an upward pushing force F1 to the membrane 40, and similarly, the elastic member 30 applies a downward elastic force F2 to the membrane 40 due to compression, and when the elastic force F2 applied to the membrane 40 by the elastic member 30 is greater than the pushing force F1 applied to the membrane 40 by the pressure in the cell, the membrane 40 is tightly attached to the base 10, so as to seal the first ventilation hole 12 and isolate the internal and external channels of the cell.
When the pushing force F1 exerted by the internal pressure of the battery cell on the diaphragm 40 is greater than the elastic force F2 exerted by the elastic member 30 on the diaphragm 40, the diaphragm 40 is pushed up, a gap is generated between the diaphragm 40 and the surface of the first vent hole 12, the first vent hole 12 is opened, the gas circulation path inside and outside the battery cell is opened, and the gas is discharged through the first vent hole 12, the second accommodating chamber 22 and the second vent hole 21. Through transferring a part of gas to the outside of the battery cell through the gas regulating valve 100, the pressure intensity in the battery cell is reduced, the electric performance and the safety performance of the battery cell are ensured, the appearance size of the battery cell is ensured not to be greatly deformed, and the die structure frame is not pressed.
After the gas is discharged, the pressure inside the battery cell gradually decreases until the resilience force F2 is again greater than the pushing force F1, and the membrane 40 is pressed by the elastic piece 30 to push back and is closely attached to the base 10 again, so that the first vent hole 12 is closed, and the internal and external channels of the battery cell are isolated.
It should be noted that, in this process, the center of diaphragm 40 is continuously subjected to downward elastic force F2 of elastic member 30 or upward pushing force F1 of the internal pressure of the battery cell, so that the structural strength of diaphragm 40 is easily exceeded, and diaphragm 40 is likely to fail.
Therefore, as shown in fig. 3A to 3C, in the present embodiment, the diaphragm 40 is configured in a bowl shape, and includes a main body portion 41 located in a central area of the diaphragm 40 and a connection portion 44 located at an outer periphery of the main body portion 41, wherein a thickness of the main body portion 41 is greater than a thickness of the connection portion 44, the main body portion 41 is aligned with the elastic member 30, and the connection portion 44 is connected with a bottom of the second accommodating cavity 22 in a sealing manner. On the one hand, by thickening the center of the diaphragm 40, the structural strength of the diaphragm 40 can be effectively improved. On the other hand, the membrane 40 is bowl-shaped, so that the downward resilience force F2 of the membrane 40 can be effectively dispersed, the resilience force F2 is prevented from concentrating at one point on the membrane 40, uneven stress on the membrane is caused, the periphery of the membrane cannot be subjected to the downward resilience force F2, and the periphery of the membrane 40 is not completely sealed.
Specifically, the connection portion 44 includes a sub-connection portion 42 and a flange portion 43, where the sub-connection portion 42 connects the main body portion 41 and the flange portion 43, and the main body portion 41 and the flange portion 43 are in a parallel structure. In contrast, the bottom of the second accommodating chamber 22 has a stepped truncated cone structure, and forms a first sealing portion 24 and a second sealing portion 25, which are engaged with the sub-connecting portion 42 and the flange portion 43, respectively.
However, when the pressure value inside the battery cell is greater than or equal to the opening value of the gas regulating valve 100, the diaphragm 40 is pushed and lifted, a gap is generated between the diaphragm 40 and the surface where the first vent hole 12 is located, and the first vent hole 12 is opened, but because the diaphragm 40 receives the pushing force F1 of the pressure inside the battery cell, the connecting portion 44 of the diaphragm 40 may be tightly attached to the bottom of the second accommodating cavity 22 under the action of the pushing force F1, so that the gas entering the first vent hole 12 cannot smoothly enter the second accommodating cavity 22, thereby blocking the gas circulation path in the state of venting and pressure relief.
Therefore, as shown in fig. 2A, 2C and 2D, in the embodiment of the present utility model, the bottom of the second accommodating chamber 22 is surrounded with the ventilation groove 23, and the ventilation groove 23 is at least located within the sealing range between the bottom of the first accommodating chamber 11 and the connecting portion 44, so that a micro gap capable of allowing gas to flow exists at the contact interface between the bottom of the second accommodating chamber 22 and the connecting portion 44 of the diaphragm 40, and the connecting portion 44 of the diaphragm 40 and the bottom of the second accommodating chamber 22 are prevented from being tightly adhered to each other to block the gas flow path in the state of venting. In one embodiment of the present utility model, the vent groove 23 is located at the junction of the first sealing portion 24 and the second sealing portion 25. It should be understood that the present utility model is not limited thereto, as long as the vent grooves 23 are provided to allow the gas to smoothly enter the second accommodating chamber 22 from the first vent hole 12 in the pressure release state.
The material of the membrane 40 and the shape and number of the vent grooves 23 are not particularly limited in the present utility model. Materials such as membrane 40 include, but are not limited to, fluororubber or PFA. The shape of the vent slot 23 may be rectangular, semi-circular, trapezoidal, triangular or other regular or irregular polygonal shape.
In summary, in the present embodiment, when the pressure value inside the battery cell is smaller than the opening value of the gas regulating valve 100, the gas regulating valve 100 is in a normally closed state, that is, the membrane 40 is tightly attached to the base 10, so as to close the first ventilation hole 12 and isolate the gas circulation channels inside and outside the battery cell. When the pressure value inside the battery cell is greater than or equal to the opening value of the gas regulating valve 100, the gas regulating valve 100 is opened, that is, the pushing force F1 of the pressure overcomes the resilience force F2 of the elastic member 30, the gas pushes the membrane 40 up through the first vent hole 12, the first vent hole 12 is opened, and the gas inside the battery cell is discharged through the first vent hole 12, the vent groove 23, the second accommodating chamber 22 and the second vent hole 21, as shown by an arrow K1 in fig. 1D, the gas flow path in the venting and pressure releasing state is illustrated. As the gas is discharged, the pressure inside the battery cell gradually decreases, the resilience force F2 is again greater than the pushing force F1, the diaphragm 40 is pushed back by the elastic member 30, and is closely attached to the base 10 again, so as to close the first vent hole 12, and the gas regulating valve 100 is closed.
In this embodiment, the bonding position between the holder 20 and the base 10 is located outside the battery cell, so that when the holder 20 is bonded to the base 10, foreign matters caused by the processing process do not enter the battery cell, and the performance of the battery cell is not affected.
In the embodiment of the present utility model, in order to further improve the pressure relief effect of the gas regulating valve 100, a third vent hole (not shown) may be further provided at the joint interface between the holder 20 and the base 10. When the pushing force F1 of the pressure overcomes the resilience force F2 of the elastic member 30, the gas pushes the membrane 40 up through the first vent hole 12, and the first vent hole 12 is opened, a part of the gas inside the cell is discharged through the first vent hole 12, the vent groove 23, the second accommodating chamber 22 and the second vent hole 21 (K1 path), and another part of the gas is discharged through the first vent hole 12, the vent groove 23 and the third vent hole.
In the second embodiment, as shown in fig. 4A to 4C, the gas and the pole of the cap assembly are integrated, that is, the pole of the cap assembly forms the base 10 of the gas regulating valve 100. However, unlike the first embodiment, the holder 20 is disposed at a side close to the battery cell in this embodiment. In this embodiment, the holder 20 is located at an end of the first accommodating cavity 11 away from the first vent hole 12, and only a second vent hole 21 is disposed in the holder 20. The elastic member 30 is located above the holder 20. The second vent hole 21 is connected to the inside of the battery cell, and the first vent hole 12 is connected to the outside of the battery cell. The diaphragm 40 is located between the second vent hole 21 and the elastic member 30. Further, the main body 41 is located between the elastic member 30 and the second vent hole 21, the first housing is provided therein with an intra-cavity sealing portion 13 engaged with the connecting portion 44, and the connecting portion 44 is connected with the intra-cavity sealing portion 13 in a sealing manner.
Further, the ventilation groove 23 is formed on the sealing joint portion in a ring, and the ventilation groove 23 is at least located in a sealing range between the sealing portion 13 and the connecting portion 44.
In this embodiment, when the pressure value inside the cell is smaller than the opening value of the gas regulating valve 100, the gas regulating valve 100 is in a normally closed state, and at this time, since the pushing force F1 exerted on the membrane 40 by the pressure inside the cell is smaller than the resilient force F2 exerted on the membrane 40 by the resilient member 30, the resilient member 30 presses the membrane 40 against the retainer 20, so as to seal the second ventilation hole 21 and isolate the gas circulation channels inside and outside the cell. When the pressure value inside the battery cell is greater than or equal to the opening value of the gas regulating valve 100, the gas regulating valve 100 is opened, the pushing force F1 of the pressure overcomes the resilience force F2 of the elastic member 30, the gas pushes the membrane 40 up through the second vent hole 21, the second vent hole 21 is opened, and the gas inside the battery cell is discharged through the second vent hole 21, the vent groove 23, the first accommodating cavity 11 and the first vent hole 12. Along with the gas discharge, the pressure inside the battery cell gradually decreases, the resilience force F2 of the elastic member 30 is again greater than the pushing force F1, the membrane 40 is pushed back by the elastic member 30, and is closely attached to the fixing member 20 again, so as to seal the second ventilation hole 21, isolate the internal and external channels of the battery cell, and close the gas regulating valve 100.
In the present embodiment, the vent groove 23 is provided such that a slight gap allowing the gas to flow is provided at the contact interface between the connecting portion 44 of the diaphragm 40 and the seal portion 13 in the cavity, so that the connecting portion 44 of the diaphragm 40 and the seal portion 13 are not bonded too tightly to block the gas flow path in the pressure relief state, and the gas regulating valve 100 cannot normally release the pressure.
However, it should be understood that, in the first embodiment, the combination position of the holder 20 and the base 10 is close to the inside of the battery cell, and when the holder 20 is combined with the base 10, foreign matters may be generated to enter the inside of the battery cell due to the processing process, thereby affecting the performance of the battery cell.
In other embodiments of the present utility model, as shown in fig. 5A to 5B, the gas regulating valve 100 may be manufactured as a separate assembly, and the gas regulating valve 100 may be provided on the top cover sheet of the top cap assembly or the case of the battery. When the gas regulating valve 100 is disposed on the top cover sheet, the gas regulating valve 100 may replace an existing explosion-proof valve to achieve the purpose of protecting the safety performance of the battery; or the gas regulating valve 100 is provided at the position of the liquid filling hole to omit the provision of the liquid filling hole. When the liquid injection hole is omitted, the assembly and the liquid injection sequence of the battery should be adjusted, that is, the mounting hole of the gas regulating valve 100 is reserved on the top cover sheet, and the electrolyte is injected into the battery through the mounting hole, and then the gas regulating valve 100 is assembled.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1. A gas regulating valve for battery protection, comprising:
the base is internally provided with a first accommodating cavity and a first vent hole which are connected in a penetrating way;
the fixing piece is positioned in the first accommodating cavity, and at least one second ventilation hole is formed in the fixing piece;
the first vent hole, the first accommodating cavity and the second vent hole are communicated, and the first vent hole and the second vent hole are positioned at two ends of the first accommodating cavity;
an elastic piece positioned in the first accommodating cavity;
and the diaphragm is positioned between the elastic piece and the first vent hole or between the elastic piece and the second vent hole.
2. The gas regulating valve of claim 1, wherein said diaphragm is bowl-shaped and includes a main body portion at a central region of said diaphragm and a connecting portion at a periphery of said main body portion, wherein a thickness of said main body portion is greater than a thickness of said connecting portion.
3. The gas regulating valve according to claim 2, wherein a second accommodation chamber is provided in the retainer, the elastic member is located in the second accommodation chamber, and the first vent hole, the second accommodation chamber, and the first vent hole are communicated; the main body part is located between the elastic piece and the first vent hole, and the connecting part is in sealing connection with the bottom of the second accommodating cavity.
4. A gas regulating valve according to claim 3, wherein the bottom of the second receiving chamber is annularly provided with a vent groove at least within the sealing range of the bottom of the first receiving chamber and the connecting portion.
5. A gas regulating valve according to claim 3, wherein a third vent is provided at the interface of the retainer and the base.
6. The gas regulating valve according to claim 2, wherein the retainer is located at an end of the first accommodation chamber away from the first vent hole, the elastic member is located above the retainer, the main body portion is located between the elastic member and the second vent hole, and an inner chamber sealing portion that is engaged with the connecting portion is provided in the first accommodation chamber, and the connecting portion is in sealing connection with the inner chamber sealing portion.
7. The gas regulating valve of claim 6, wherein said sealing portion is provided with a vent groove formed therein, said vent groove being located at least within a sealing range of said sealing portion and said connecting portion.
8. A battery comprising a gas regulating valve according to any one of claims 1 to 7, and a housing, a cell and a cap assembly; the battery cell is arranged in the shell; the top cover assembly is arranged at the opening end of the shell.
9. The battery of claim 8, wherein the post of the cap assembly forms a base of the gas regulating valve.
10. The battery of claim 8, wherein the gas regulating valve is disposed on a top cover sheet of the top cap assembly; or, the gas regulating valve is provided on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321473625.0U CN219917473U (en) | 2023-06-08 | 2023-06-08 | Gas regulating valve and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321473625.0U CN219917473U (en) | 2023-06-08 | 2023-06-08 | Gas regulating valve and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219917473U true CN219917473U (en) | 2023-10-27 |
Family
ID=88426136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321473625.0U Active CN219917473U (en) | 2023-06-08 | 2023-06-08 | Gas regulating valve and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219917473U (en) |
-
2023
- 2023-06-08 CN CN202321473625.0U patent/CN219917473U/en active Active
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