CN210074021U - Battery cover plate, battery and electric automobile - Google Patents
Battery cover plate, battery and electric automobile Download PDFInfo
- Publication number
- CN210074021U CN210074021U CN201920823435.4U CN201920823435U CN210074021U CN 210074021 U CN210074021 U CN 210074021U CN 201920823435 U CN201920823435 U CN 201920823435U CN 210074021 U CN210074021 U CN 210074021U
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- Prior art keywords
- sealing
- cover plate
- battery
- cavity
- injection hole
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- 238000007789 sealing Methods 0.000 claims abstract description 133
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 239000003792 electrolyte Substances 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000001802 infusion Methods 0.000 abstract description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model discloses a battery cover plate, a battery and an electric automobile, wherein the battery cover plate comprises a cover plate body and a liquid injection hole arranged on the cover plate body, and a sealing unit for sealing the liquid injection hole is arranged below the cover plate body; when the pressure applied to the sealing unit is smaller than the preset pressure, the liquid injection hole is closed; when the pressure applied to the sealing unit is greater than the preset pressure, the liquid injection hole is opened so as to communicate the liquid injection hole with the inner cavity of the battery. The above-mentioned scheme that this application provided for exhaust, fluid infusion operation become can realize and easily operate, can slow down battery case through the exhaust and produce gas because of inside and take place the bulging deformation, thereby can in time replenish the life of the electrolyte extension battery of consumption through the fluid infusion.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to battery apron, battery and electric automobile.
Background
With the increasing severity of energy crisis and environmental pollution problems, new energy automobiles are more and more favored by various countries due to the great advantages of energy conservation and emission reduction. The electric automobile is the main body of the new energy automobile at present, and the power battery is the most important power source of the electric automobile. Lithium ion batteries are becoming the mainstream of power batteries for electric vehicles due to their high specific energy and long cycle life.
Currently, there are three main types of lithium ion battery packages, namely, cylindrical, square and soft packages. Prismatic lithium ion batteries are commonly referred to as aluminum or steel can prismatic batteries. The square battery has a simple structure, a relatively high energy density and an arbitrary size compared with the cylindrical battery and the pouch battery, so that the popularization rate of the square battery is high domestically. However, after a certain number of deep charge-discharge cycles, the capacity of the square lithium ion battery is reduced to below 80%, and the square lithium ion battery is no longer suitable for the power battery, so that the cycle life is shortened. This is caused by the collapse and falling off of the positive and negative electrode materials, and the interaction between the electrode materials and the electrolyte during the process of releasing and inserting lithium ions, which results in serious electrolyte loss. Meanwhile, when the battery continuously forms an SEI film due to expansion and contraction of a negative electrode material during use, a part of the electrolyte is consumed, and thus the storage capacity of the electrolyte greatly affects the service life of the battery. In addition, the square battery can generate a certain amount of gas by side reaction between the electrode material and the electrolyte in the process of multiple cycles, and the gas can cause the expansion and deformation of the battery shell if the gas cannot be discharged in time, thereby causing certain influence on the normal use of the battery.
In the prior art, the liquid injection and exhaust ports of the lithium battery are sealed by sealing nails after formation and exhaust of the lithium battery. However, in the use of lithium batteries, the generated gas is more and more serious along with the use, and the performance and the safety of the lithium batteries are greatly influenced. Therefore, it is important to reduce the influence of gas generation during the use of the lithium battery.
In addition, the consumption of electrolyte is inevitable along with the gas production in the use process of the lithium battery, and the consumption is also a key factor influencing the performance of the lithium battery. Therefore, how to add the electrolyte in the use process of the lithium battery is also important.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery cover plate, battery and electric automobile can solve prior art, and current battery can not conveniently exhaust and the problem of fluid infusion.
The utility model provides a battery cover plate, which comprises a cover plate body and a liquid injection hole arranged on the cover plate body, wherein a sealing unit used for sealing the liquid injection hole is arranged below the cover plate body; when the pressure applied to the sealing unit is smaller than the preset pressure, the liquid injection hole is closed; when the pressure applied to the sealing unit is greater than the preset pressure, the liquid injection hole is opened so as to communicate the liquid injection hole with the inner cavity of the battery.
Further, the sealing unit comprises a sealing shell with a cavity, a sealing column arranged in the sealing shell and a reset elastic piece; the sealing shell is detachably fixed below the cover plate body, the upper end of the sealing shell is provided with a first opening, the lower end of the sealing shell is provided with a second opening, the first opening is communicated with the liquid injection hole, and the second opening is communicated with the inner cavity of the battery; one end of the sealing column seals the first opening, and the other end of the sealing column props against the inner wall of the sealing shell through the reset elastic piece.
Furthermore, a first cavity and a second cavity which are communicated are sequentially arranged in the sealing shell from top to bottom, the diameter of the first cavity is larger than that of the second cavity, the first cavity is communicated with the first opening, and the second cavity is communicated with the second opening; the sealing column is arranged in the first cavity, the resetting elastic piece is arranged in the second cavity, and the bottom surface of the sealing column is connected with the resetting elastic piece.
Further, the sealing unit further comprises a guide piece arranged in the sealing shell, the outer wall of the guide piece is connected with the inner wall of the first cavity, and the sealing column penetrates through the guide piece along the moving direction of the sealing column.
Further, the guide piece comprises a circular ring which is sleeved on the sealing column.
Further, the sealing unit further comprises a second connecting rod, and the circular ring is fixedly fixed in the first cavity through the second connecting rod.
Further, the sealing unit further comprises a sealing ring arranged in the sealing shell, and the sealing column seals the liquid injection hole through the sealing ring.
Furthermore, one surface of the sealing ring is a smooth surface, and the other surface of the sealing ring is provided with annular threads; the top end of the sealing column is in contact with the annular thread surface on the sealing ring.
The utility model provides a battery, includes the casing, by the pole piece including the casing parcel and seal the battery apron of casing, battery apron be this application embodiment describe arbitrary battery apron, just annotate liquid hole on the battery apron with the casing inner chamber link up.
An electric automobile with above-mentioned battery.
According to the battery cover plate of the embodiment, the sealing unit for sealing the liquid injection hole is arranged below the cover plate body, when the battery is in a normal working state and the pressure applied to the sealing unit is smaller than the preset pressure, the liquid injection hole is sealed, so that air, moisture and the like outside the battery can be prevented from entering the battery, and meanwhile, the volatilization of electrolyte is prevented; when the pressure that the sealing unit received is greater than preset pressure, annotate the liquid hole and open and communicate with the battery inner chamber, the battery inside communicates with each other with external environment this moment, and the inside gas of battery is discharged to the outside, and after gas exhaustion, available syringe carries out the fluid infusion to the battery through annotating the liquid hole, removes the pressure to the sealing unit application after the fluid infusion operation is accomplished, and the sealing unit resumes initial condition, and then makes the battery sealed. This application makes exhaust, fluid infusion operation become can realize and easily operate, can slow down battery case through the exhaust and produce gas because of inside and take place the bulging deformation, thereby can in time replenish the electrolyte of consumption through the fluid infusion and prolong the life of battery.
Drawings
Fig. 1 is a schematic diagram of a battery cover plate structure according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection relationship between rings according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a seal ring according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The utility model discloses a battery cover plate is used for the sealed of battery, is used for lithium ion battery's sealed more, especially high-power lithium ion battery, for example: and sealing the lithium ion power battery and the lithium ion energy storage battery. Those skilled in the art know that lithium ion batteries mainly comprise: the battery comprises a shell with at least one open end, a pole core arranged in the shell, electrolyte contained in the shell and a battery cover plate for sealing the shell. Since the battery includes a circular battery, a square battery, or the like, and accordingly, the shape of the case may be a cylindrical shape, a square cylindrical shape, or other shapes, the material is the first metal such as aluminum, aluminum alloy, or steel. The contour shape of the battery cover plate is arranged according to the end shape of the shell, such as square, round and the like, and the battery cover plate can be packaged at the end of the shell in a welding mode and keeps the tightness of the battery cover plate.
The embodiment of the present application describes a battery cover plate specifically, as shown in fig. 1 and fig. 2, the battery cover plate includes a cover plate body 10, a negative pole post 101 and a positive pole post 102 are respectively disposed on two sides of the cover plate body 10, the negative pole post 101 and the positive pole post 102 are respectively positioned at two ends of the cover plate body 10 and are respectively electrically connected to a negative pole and a positive pole of a battery after penetrating through the cover plate, for example, the negative pole post 101 is positioned at the right end of the cover plate body 10 in a state of maintaining electrical insulation between the negative pole post 101 and the cover plate body 10, and the positive pole post 102 is also positioned at the left end of the cover plate body 10 in a state of maintaining electrical insulation between the.
The embodiment of the utility model provides an in, still be provided with on this apron body 10 and annotate liquid hole 20, should annotate liquid hole 20 and be arranged in annotating the liquid operation to having been done sealed lithium ion battery by apron body 10, be provided with the seal unit who is used for sealed notes liquid hole 20 in above-mentioned apron body 10 below.
The sealing unit comprises a sealing shell 207 with a cavity, a sealing column 202 arranged in the sealing shell 207 and a reset elastic piece 206; specifically, this sealed housing 207 can be dismantled and fix in the below of apron body 10, simultaneously this sealed housing 207 upper end offer with annotate the first trompil of liquid hole 20 intercommunication, the second trompil with battery chamber intercommunication is offered to sealed housing 207 lower extreme, the lower extreme and the sealed housing 207 inner chamber bottom surface fixed connection of elastic component 206 reset, the upper end and the bottom surface fixed connection of sealed post 202, the upper end of sealed post 202 is through the sealed first trompil of living of the elasticity of elastic component 206 that resets, and then sealed the notes liquid hole 20 of establishing with first trompil intercommunication.
As an implementation manner in this embodiment, the sealing case 207 may be fixed below the cover plate body 10 by the first link 204.
In the embodiment of the application, when the pressure applied to the reset elastic member is smaller than the preset pressure, the sealing column seals the first opening under the elastic force of the reset elastic member, so that the liquid injection hole is sealed, air, moisture and the like outside the battery can be prevented from entering the battery, and meanwhile, the volatilization of the electrolyte is prevented; when the pressure that the elastic component that resets received is greater than preset pressure, the sealed post downstream, annotate liquid hole and first trompil intercommunication this moment, because first trompil and second trompil intercommunication, second trompil and battery inner chamber intercommunication, so after annotating liquid hole and first trompil intercommunication, the inside gas of battery passes through the second trompil in proper order, first trompil, annotate the liquid hole and discharge, after gaseous exhaust, available syringe mends liquid through annotating liquid hole to battery, remove the pressure of applying to the elastic component that resets after the operation of mending liquid is accomplished, the elastic component that resets resumes initial condition, and then make the sealed first trompil of sealed post, thereby sealed annotate the liquid hole.
It should be noted that a first through cavity and a second through cavity are sequentially arranged in the sealing shell 207 from top to bottom, the diameter of the first cavity is larger than that of the second cavity, the first cavity is communicated with the first opening, and the second cavity is communicated with the second opening; the sealing post 202 is disposed in the first cavity, the diameter of the sealing post 202 is larger than that of the first opening, the elastic restoring element 206 is disposed in the second cavity, and the bottom surface of the sealing post 202 is fixedly connected to the elastic restoring element 206.
In order to reduce the problem that the sealing column 202 shakes left and right in the sealing shell 207 to cause the sealing to be weak, in the present application, a guide 203 for positioning the movement direction of the sealing column 202 is arranged around the sealing column 202, and when the sealing column is used, the sealing column 202 passes through the guide 203 arranged in the sealing shell 207 along the movement direction, so that the shaking of the sealing column 202 can be effectively reduced. In practice, the bottom surface of the sealing post 202 is aligned with the center of the return spring 206 and the top surface is aligned with the center of the first opening.
The sealing post 202 may be a hollow aluminum post, which is resistant to electrolyte corrosion and has a relatively light weight.
It should be understood that the sealing post is a hollow aluminum post for example only, and in other alternative embodiments, the sealing post may be other electrolyte corrosion resistant cylinders, such as a non-metal teflon cylinder, for sealing the injection hole. The present application does not impose any particular restrictions on the type and specific structure of the seal post, as long as the seal post can satisfy the purpose of sealing the injection hole.
The guide 203 may be a ring made of Polytetrafluoroethylene (PTFE). The ring is sleeved on the sealing column and used for limiting the sealing column to shake left and right in the sealing shell.
As an embodiment of the present embodiment, the guide 203 in the present application may be fixed to the sealing case 207 by the second link 205. Specifically, a plurality of second links 205 are fixedly connected to the periphery of the guide 203, and the other ends of the second links 205 are fixed to the sealing case 207.
It should be understood that the guide is an annular ring, and in other alternative embodiments, the guide may have other configurations to limit the oscillation of the sealing post, such as a directional block disposed on the inner wall of the sealing shell. The present application does not specifically limit the type and specific structure of the guide member, as long as the guide member can satisfy the purpose of restricting the shaking of the seal post.
In order to ensure the sealing performance between the sealing column 202 and the injection hole 20 in the present application, a sealing ring 201 is further disposed in the sealing shell 207, the sealing ring 201 is located above the sealing column 202, and the upper end of the sealing column 202 seals the injection hole 20 by abutting against the sealing ring 201 under the action of the elastic force of the restoring elastic element 206.
Referring to fig. 3, in the present application, one surface of the sealing ring 201 is a smooth surface, and the other surface is provided with circular threads having the same center and pitch but different diameters. When the liquid filling hole is used, the smooth surface faces upwards and the thread surface faces downwards, so that the sealing performance of the liquid filling hole can be further ensured.
It should be understood that the structure of the sealing ring in the above embodiment is merely an example, and in other alternative embodiments, the sealing ring may have other structures for sealing the liquid injection hole, such as a fluororubber ring. The application does not make special restriction to the concrete structure of sealing washer, as long as this sealing washer can satisfy the sealed mesh of annotating the liquid hole alright.
In the embodiment of the present application, the return elastic element 206 may be a compression spring, the diameter of the compression spring is smaller than that of the second cavity, and the material of the spring may be stainless steel. Other elastic mechanisms can be selected as the elastic resetting piece.
Referring to fig. 1, in the present application, in order to provide an explosion-proof function for the safety structure design of the battery, an explosion-proof valve 103 is further disposed on the cover plate body 10, and the explosion-proof valve 103 is disposed between the negative pole post 101 and the positive pole post 102 and is located at the left side of the liquid injection hole 20; the cover plate body 10 is further provided with an explosion-proof valve protection sheet 104, and the explosion-proof valve protection sheet 104 is positioned on the explosion-proof valve 103.
The explosion-proof valve can select an expanded polytetrafluoroethylene (E-PTFE) microporous membrane as a main waterproof breathable material, wherein the diameter of micropores of the E-PTFE membrane is between 0.1 and 10 mu m, the average diameter of air molecules is only 0.00036 mu m, the average diameter of water vapor is 0.00047 mu m, the diameter of capillary rain is about 500 mu m, namely the pore diameter of the EPTFE membrane is more than 1000 times larger than the gas diameter and is one thousand times of that of water drops. In addition, because the surface energy of the E-PTFE membrane is very low, small water drops can quickly form larger water drops on the surface of the E-PTFE membrane under the action of surface tension (water molecules pull each other). Therefore, the gas can smoothly pass through the waterproof and breathable fabric, and liquid water cannot pass through the waterproof and breathable fabric, so that the waterproof and breathable fabric has good waterproof and breathable performance.
When the internal pressure of the battery is smaller than the set explosion value of the explosion-proof valve, the battery belongs to a normal working state, and the working principle of the battery is the same as that of a traditional waterproof ventilation valve under the working state: the inner and outer air in the cavity freely circulate through the E-PTFE waterproof breathable film arranged in the valve body, the air flows from the side with high pressure to the side with low pressure, namely, the air is discharged outwards when the internal pressure of the cavity is higher than the external pressure of the cavity, and the air enters the inner cavity when the internal pressure of the cavity is lower than the external pressure of the cavity, so that the balance of the internal and external air pressures is realized. In this state, the PUW explosion-proof valve functions as a waterproof vent valve (breather valve).
It should be understood that the selection of expanded polytetrafluoroethylene (E-PTFE) microporous membrane for the explosion-proof valve is merely exemplary, and in other alternative embodiments, the explosion-proof valve may be vented using other configurations, such as pbaml 20 x 1.5-15 type explosion-proof valves. The specific type of the explosion-proof valve is not particularly limited, so long as the explosion-proof valve can meet the purpose of safety and explosion prevention of the battery.
The working principle of the battery cover plate in the application is as follows:
normally, the sealing column 202 can seal the liquid injection hole 20 through the sealing ring 201 on the upper end surface under the action of the elastic force of the reset elastic member 206, thereby realizing the sealing of the liquid injection hole 20. When the air needs to be exhausted, only a rod-shaped object with certain hardness is used for applying downward pressure to the sealing column 202 through the liquid injection hole 20 to enable the sealing column 202 to slide downwards, the reset elastic piece 206 is in a compressed state at the moment, the sealing column 202 is separated from the sealing ring 201, the sealing ring 201 is further separated from the liquid injection hole 20, therefore, the interior of the battery is communicated with the external environment, and the air in the battery is exhausted to the outside due to air pressure. After the gas is exhausted, the liquid can be replenished to the battery through the liquid filling hole 20 by using an injector, when the pressure applied to the sealing column 202 is removed after the liquid replenishing operation is completed, the sealing column 202 slides upwards again to abut against the sealing ring 201 under the elastic force of the resetting elastic piece 206, and the battery is sealed. The opening of the liquid injection hole is realized by applying external pressure, so that the size of the through hole communicated with the battery inner cavity can be adjusted by controlling the external pressure, and other impurities are prevented from entering the battery inner cavity.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (10)
1. A battery cover plate comprises a cover plate body and a liquid injection hole arranged on the cover plate body, and is characterized in that a sealing unit used for sealing the liquid injection hole is arranged below the cover plate body;
when the pressure applied to the sealing unit is smaller than the preset pressure, the liquid injection hole is closed; when the pressure applied to the sealing unit is greater than the preset pressure, the liquid injection hole is opened so as to communicate the liquid injection hole with the inner cavity of the battery.
2. The battery cover plate according to claim 1, wherein the sealing unit comprises a sealing case with a cavity, a sealing post disposed in the sealing case, and a restoring elastic member;
the sealing shell is detachably fixed below the cover plate body, the upper end of the sealing shell is provided with a first opening, the lower end of the sealing shell is provided with a second opening, the first opening is communicated with the liquid injection hole, and the second opening is communicated with the inner cavity of the battery;
one end of the sealing column seals the first opening, and the other end of the sealing column props against the inner wall of the sealing shell through the reset elastic piece.
3. The battery cover plate according to claim 2, wherein a first cavity and a second cavity are sequentially arranged in the sealing shell from top to bottom, the diameter of the first cavity is larger than that of the second cavity, the first cavity is communicated with the first opening, and the second cavity is communicated with the second opening;
the sealing column is arranged in the first cavity, the resetting elastic piece is arranged in the second cavity, and the bottom surface of the sealing column is connected with the resetting elastic piece.
4. The battery cover plate according to claim 3, wherein the sealing unit further comprises a guide member disposed in the sealing case, an outer wall of the guide member being connected with an inner wall of the first cavity, the sealing post passing through the guide member in a moving direction thereof.
5. The battery cover plate of claim 4, wherein the guide comprises a ring that is sleeved over the sealing post.
6. The battery cover plate of claim 5, wherein the sealing unit further comprises a second connecting rod, and the circular ring is fixed in the first cavity through the second connecting rod.
7. The battery cover plate according to claim 2, wherein the sealing unit further comprises a sealing ring provided in the sealing case, and the sealing post seals the injection hole through the sealing ring.
8. The battery cover plate according to claim 7, wherein one side of the sealing ring is smooth and the other side is provided with annular threads; the top end of the sealing column is in contact with the annular thread surface on the sealing ring.
9. A battery, including the body, pole core and battery cover plate to seal said body wrapped in body, characterized by that, the said battery cover plate is the battery cover plate of any claim 1-8, and the liquid injection hole on the said battery cover plate is communicated with said body cavity.
10. An electric vehicle having the battery of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823435.4U CN210074021U (en) | 2019-06-03 | 2019-06-03 | Battery cover plate, battery and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823435.4U CN210074021U (en) | 2019-06-03 | 2019-06-03 | Battery cover plate, battery and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210074021U true CN210074021U (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920823435.4U Active CN210074021U (en) | 2019-06-03 | 2019-06-03 | Battery cover plate, battery and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210074021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284604A (en) * | 2021-12-24 | 2022-04-05 | 上海兰钧新能源科技有限公司 | Flat and long battery shell, lithium ion battery and electric automobile |
-
2019
- 2019-06-03 CN CN201920823435.4U patent/CN210074021U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284604A (en) * | 2021-12-24 | 2022-04-05 | 上海兰钧新能源科技有限公司 | Flat and long battery shell, lithium ion battery and electric automobile |
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