WO2024098202A1 - 端盖组件、电池单体、电池以及用电装置 - Google Patents
端盖组件、电池单体、电池以及用电装置 Download PDFInfo
- Publication number
- WO2024098202A1 WO2024098202A1 PCT/CN2022/130354 CN2022130354W WO2024098202A1 WO 2024098202 A1 WO2024098202 A1 WO 2024098202A1 CN 2022130354 W CN2022130354 W CN 2022130354W WO 2024098202 A1 WO2024098202 A1 WO 2024098202A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rib
- battery cell
- cover body
- pressure relief
- relief mechanism
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 105
- 230000002093 peripheral effect Effects 0.000 description 43
- 238000000926 separation method Methods 0.000 description 27
- 238000003466 welding Methods 0.000 description 19
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- 238000010586 diagram Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000002452 interceptive effect Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
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- 229910052742 iron Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
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- 239000011149 active material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 3
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
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- 229910001425 magnesium ion Inorganic materials 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- 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
Definitions
- the present application relates to the field of battery technology, and in particular to an end cover assembly, a battery cell, a battery and an electrical device.
- Battery cells are widely used in electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric ships, electric toy cars, electric toy ships, electric toy planes and electric tools, etc.
- electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric ships, electric toy cars, electric toy ships, electric toy planes and electric tools, etc.
- the safety of battery cells is also an issue that cannot be ignored.
- One of the purposes of the embodiments of the present application is to provide an end cover assembly, a battery cell, a battery and an electrical device to solve the technical problem in the related art that the safety of the battery cell is reduced due to the failure of the pressure relief mechanism of the battery cell to open in time.
- an end cap assembly comprising:
- the cover body is provided with a pressure relief mechanism
- a first convex rib is disposed on the cover body and is disposed around the pressure relief mechanism
- the second convex rib is arranged on the cover body and is arranged on a side of the first convex rib away from the pressure relief mechanism.
- the beneficial effect of the end cover assembly provided in the embodiment of the present application is that: the end cover assembly provided in the embodiment of the present application effectively increases the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism by arranging the first rib and the second rib on the cover body, and making the first rib arranged around the pressure relief mechanism and making the second rib arranged on the side of the first rib away from the pressure relief mechanism.
- the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism is further increased, so that the pressure relief mechanism can be opened more quickly to discharge the gas accumulated inside the battery cell to the outside, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the first rib and a plurality of the second ribs are distributed to form a symmetrical structure.
- the strength consistency of the two opposite sides of the cover body located on the outer peripheral side of the pressure relief mechanism is effectively improved, and the situation where the stress is concentrated on one side of the cover body located on the outer peripheral side of the pressure relief mechanism, resulting in uneven force on the entire cover body, is effectively avoided, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism is further increased, so that the pressure relief mechanism can be opened more quickly to discharge the gas accumulated inside the battery cell to the outside, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the first rib and a plurality of the second ribs are distributed to form a symmetrical structure.
- the strength consistency of each position of the cover body located on the outer peripheral side of the pressure relief mechanism is effectively improved, and the situation where the stress is concentrated at a certain position of the cover body located on the outer peripheral side of the pressure relief mechanism, resulting in uneven force on the entire cover body, is effectively avoided, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the second rib extends from the first rib toward the edge of the cover.
- the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism is further increased, so that the pressure relief mechanism can be opened more quickly to discharge the gas accumulated inside the battery cell to the outside, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- one end of the second convex rib is connected to the first convex rib, and the other end of the second convex rib extends to the edge of the cover body.
- the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism is further increased, so that the pressure relief mechanism can be opened more quickly to discharge the gas accumulated inside the battery cell to the outside, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the end cover assembly further includes a third rib disposed on an edge of the cover body, and a side of the third rib facing away from the pressure relief mechanism is flush with a side wall of the cover body.
- the welding area between the end cover assembly and the battery cell shell can be effectively increased without occupying too much internal space of the battery cell shell, thereby effectively increasing the welding strength between the end cover assembly and the battery cell shell, further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of battery cell use.
- the third rib is arranged on the pressure relief mechanism.
- the size of the weld mark between the outer wall of the end cover assembly and the inner wall of the shell of the battery cell becomes more uniform, so that the force on the outer wall of the end cover assembly becomes more uniform, further increasing the welding strength between the end cover assembly and the shell of the battery cell, while further increasing the overall structural strength of the cover body, further reducing the deformation amplitude of the cover body when the internal pressure of the battery cell is high, thereby further reducing the risk of separation between the cover body and the shell of the battery cell, and further improving the safety of the battery cell.
- the second rib is connected between the first rib and the third rib.
- the overall structural strength of the cover is further increased, and the deformation amplitude of the cover when the internal pressure of the battery cell is high is further reduced, thereby further reducing the risk of separation between the cover and the battery cell shell, and further improving the safety of the battery cell.
- the end cover assembly further includes a fourth rib disposed on the cover body, wherein the fourth rib is disposed around the pressure relief mechanism and is located between the first rib and the third rib.
- the overall structural strength of the cover is further increased, and the deformation amplitude of the cover when the internal pressure of the battery cell is high is further reduced, thereby further reducing the risk of separation between the cover and the battery cell shell, and further improving the safety of the battery cell.
- the overall structural strength of the cover is further increased, and the deformation amplitude of the cover when the internal pressure of the battery cell is high is further reduced, thereby further reducing the risk of separation between the cover and the battery cell shell, and further improving the safety of the battery cell.
- the protrusion height of the third rib relative to the surface of the cover body is 0.2mm-3mm.
- the third rib can effectively increase the welding area between the end cover assembly and the shell, and it can also prevent the third rib from interfering with other components due to excessive protrusion height.
- the width of the third rib is 0.3 mm-8 mm.
- the third rib can effectively increase the welding strength between the end cover assembly and the shell, and it can also prevent the third rib from interfering with other components due to its excessive width.
- the cover body has a first surface and a second surface that are arranged opposite to each other, the first rib and the second rib are both arranged on the first surface, and the end cover assembly also includes a fifth rib arranged on the second surface, and the fifth rib is arranged around the pressure relief mechanism.
- the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism is further increased, so that the pressure relief mechanism can be opened more quickly to discharge the gas accumulated inside the battery cell to the outside, thereby further reducing the risk of separation between the cover body and the battery cell shell, and further improving the safety of the battery cell.
- the protrusion height of the first rib relative to the surface of the cover body is 0.2mm-6mm.
- the first rib can have a sufficient reinforcing effect on the portion of the cover body located on the outer peripheral side of the pressure relief mechanism, and it can also prevent the first rib from interfering with other components due to excessive protrusion height.
- the width of the first rib is 0.5 mm-10 mm.
- the first rib can have a sufficient reinforcing effect on the portion of the cover body located on the outer peripheral side of the pressure relief mechanism, and it can also prevent the first rib from interfering with other components due to its excessive width.
- an embodiment of the present application provides a battery cell, comprising a shell and the end cover assembly described in any one of the above embodiments, wherein the cover body is disposed on the shell.
- the beneficial effect of the battery cell provided by the embodiment of the present application is that the battery cell provided by the embodiment of the present application adopts the end cover assembly described in any of the above embodiments, thereby effectively improving the safety of the battery cell.
- an embodiment of the present application provides a battery, comprising the above-mentioned battery cell.
- the beneficial effect of the battery provided in the embodiment of the present application is that the battery provided in the embodiment of the present application adopts the above-mentioned battery monomer, thereby effectively improving the safety of the battery.
- an embodiment of the present application provides an electrical device comprising the above-mentioned battery.
- the beneficial effect of the electric device provided by the embodiment of the present application is that the electric device provided by the embodiment of the present application adopts the above-mentioned battery, thereby effectively improving the safety of use of the electric device.
- FIG1 is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application.
- FIG2 is a schematic diagram of an explosion of a battery provided in an embodiment of the present application.
- FIG3 is a schematic diagram of the structure of a battery module provided in an embodiment of the present application.
- FIG4 is a schematic diagram of the structure of a battery cell provided in an embodiment of the present application.
- FIG5 is a schematic diagram of an explosion of the battery cell shown in FIG4 ;
- FIG6 is a schematic structural diagram of an end cap assembly in the battery cell shown in FIG5 ;
- FIG7 is a schematic cross-sectional view of the end cover assembly shown in FIG6 along the A-A line;
- FIG8 is a schematic structural diagram of an end cover assembly provided in an embodiment of the present application after removing the weak structure and the motor terminal;
- FIG9 is a schematic structural diagram of an end cover assembly provided in another embodiment of the present application with the weak structure and the motor terminal removed;
- FIG10 is a schematic structural diagram of an end cover assembly provided in yet another embodiment of the present application with the weak structure and the motor terminal removed;
- FIG11 is a schematic structural diagram of an end cover assembly provided in yet another embodiment of the present application with the weak structure and the motor terminal removed;
- FIG12 is a schematic structural diagram of an end cover assembly provided in yet another embodiment of the present application with the weak structure and the motor terminal removed;
- FIG13 is a schematic diagram of the front structural view of the battery cell shown in FIG4 ;
- FIG14 is a schematic cross-sectional view of the battery cell shown in FIG13 along the B-B line;
- FIG. 15 is a schematic diagram of the enlarged structure of the battery cell at position C shown in FIG. 14 .
- a battery cell refers to the smallest electrical energy storage unit including a shell, a cover, a pressure relief mechanism, an electrode assembly and other components. Battery cells can be arranged in series, parallel, or series-parallel to form a battery. With the rapid development of the new energy vehicle market, batteries, as the power source of new energy vehicles, are particularly important for the entire vehicle system in terms of safety. The safety of battery cells is a key factor in determining whether the safety of batteries meets the requirements.
- the inventor of the present application noticed that the cover body and the shell in the end cover assembly of the battery cell are usually connected by welding.
- the battery cell will generate gas during the charging and discharging process.
- the battery cell When the battery cell is damaged or fails, the battery cell will produce gas rapidly, causing the internal pressure of the battery cell to increase rapidly.
- the cover body due to the large force-bearing area of the cover body, the cover body needs to withstand a large pressure, resulting in deformation of the cover body.
- the part of the cover body used to install the pressure relief mechanism will also deform accordingly, making it impossible to effectively concentrate stress on the weak structure of the pressure relief mechanism, resulting in the inability to open the pressure relief mechanism in time.
- an end cover assembly after in-depth research which includes a cover body, a first convex rib and a second convex rib.
- the cover body is provided with a pressure relief mechanism
- the first convex rib and the second convex rib are both arranged on the cover body
- the first convex rib is arranged around the pressure relief mechanism of the cover body
- the second convex rib is arranged on the side of the first convex rib away from the pressure relief mechanism, thereby effectively increasing the strength of the portion of the cover body located on the outer peripheral side of the pressure relief mechanism.
- the embodiment of the present application provides an electric device using a battery 100 as a power source
- the electric device includes but is not limited to a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.
- the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.
- the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
- FIG. 1 is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application.
- the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle.
- the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
- a battery 100 is arranged inside the vehicle 1000, and the battery 100 can be arranged at the bottom, head or tail of the vehicle 1000.
- the battery 100 can be used to power the vehicle 1000.
- the battery 100 can be used as an operating power source for the vehicle 1000.
- the vehicle 1000 may also include a controller 200 and a motor 300.
- the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.
- the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
- FIG. 2 is an exploded schematic diagram of a battery 100 provided in an embodiment of the present application.
- the battery 100 includes a box body 10 and a battery cell 21, and the battery cell 21 is accommodated in the box body 10.
- the box body 10 is used to provide a storage space 13 for the battery cell 21, and the box body 10 can adopt a variety of structures.
- the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space 13 for accommodating the battery cell 21.
- the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 is covered on the open side of the second part 12, so that the first part 11 and the second part 12 jointly define the storage space 13; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12.
- the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.
- the battery 100 there can be multiple battery cells 21, and the multiple battery cells 21 can be connected in series, in parallel, or in mixed connection.
- Mixed connection means that the multiple battery cells 21 are both connected in series and in parallel.
- the multiple battery cells 21 can be directly connected in series, in parallel, or in mixed connection, and then the whole body formed by the multiple battery cells 21 is accommodated in the box 10.
- the battery 100 can also be a battery module 20 composed of multiple battery cells 21 connected in series, in parallel, or in mixed connection, and the multiple battery modules 20 are then connected in series, in parallel, or in mixed connection to form a whole body and accommodated in the box 10.
- Each battery cell 21 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
- the battery cell 21 may also be cylindrical, flat, rectangular or in other shapes.
- FIG. 4 is a schematic diagram of the structure of a battery cell 21 provided in an embodiment of the present application
- FIG. 5 is an exploded schematic diagram of the battery cell 21 shown in FIG. 4
- the battery cell 21 refers to the smallest electrical energy storage unit constituting the battery 100.
- the battery cell 21 includes an end cap assembly 211, a housing 212, an electrode assembly 213, a current collecting member 214, and other functional components.
- the end cap assembly 211 refers to a component that is covered at the opening 2121 of the housing 212 to isolate the internal environment of the battery cell 21 from the external environment.
- the shape of the end cap assembly 211 can be adapted to the shape of the housing 212 to match the housing 212.
- the material of the end cap assembly 211 includes a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specifically limited here.
- electrode terminals 2118 may be provided on the end cap assembly 211.
- the electrode terminal 2118 may be used to be electrically connected to the electrode assembly 213 to output or input electrical energy of the battery cell 21.
- the end cap assembly 211 may also be provided with a pressure relief mechanism 2112 for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold.
- the end cap assembly 211 may also be provided with an insulating member, which may be used to isolate the electrical connection components in the housing 212 from the end cap assembly 211 to reduce the risk of short circuit.
- the insulating member may be made of a variety of materials, such as plastic, rubber, or organic material film, etc., which are not specifically limited here.
- the shell 212 is a component for providing an internal environment of the battery cell 21, wherein the internal environment can be used to accommodate the electrode assembly 213, the current collecting member 214, the electrolyte and other components.
- the shell 212 can be an independent component, and an opening 2121 can be set on the shell 212.
- the internal environment of the battery cell 21 is formed by covering the end cap assembly 211 on the opening 2121, and the electrode assembly 213, the current collecting member 214 and other components are accommodated in the internal environment.
- the end cap assembly 211 and the shell 212 can form a common connection surface before other components are put into the shell.
- the end cap assembly 211 is covered on the opening 2121 of the shell 212.
- the shell 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc.
- the material of the shell 212 includes various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which are not specifically limited here.
- the electrode assembly 213 is a component in the battery cell 21 where an electrochemical reaction occurs.
- the battery cell 21 may include one or more electrode assemblies 213.
- the electrode assembly 213 is mainly made of a positive electrode sheet, a negative electrode sheet and a separator using a winding process or a lamination process.
- the separator is used to insulate and separate the positive electrode sheet and the negative electrode sheet.
- the parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main part of the electrode assembly 213, the tabs formed by the parts of the positive electrode sheet without active materials are the positive electrode tabs, and the tabs formed by the parts of the negative electrode sheet without active materials are the negative electrode tabs.
- the positive electrode tabs and the negative electrode tabs may be located together at one end of the main part of the electrode assembly 213 or respectively at both ends of the main part of the electrode assembly 213.
- the positive electrode active material and the negative electrode active material react with the electrolyte, the tabs are electrically connected to the current collecting member 214, and the current collecting member 214 is electrically connected to the electrode terminal 2118 to form a current loop.
- the current collecting member 214 is a conductive connecting medium between the electrode assembly 213 and the electrode terminal 2118.
- the current collecting member 214 serves to lead the current of the electrode assembly 213 to the electrode terminal 2118 to achieve electrical connection between the electrode assembly 213 and the electrode terminal 2118.
- the current collecting member 214 can be connected to the pole ear of the electrode assembly 213 by welding, abutting or bonding, so as to achieve electrical connection between the current collecting member 214 and the electrode assembly 213.
- the material of the current collecting member 214 includes a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.
- the shape of the current collecting member 214 includes a variety of shapes, such as circular, polygonal, etc., which are not specifically limited here.
- the end cover assembly 211 includes a cover body 2111, a first convex rib 2113 and a second convex rib 2114.
- the cover body 2111 is provided with a pressure relief mechanism 2112, the first convex rib 2113 and the second convex rib 2114 are both arranged on the cover body 2111, the first convex rib 2113 is arranged around the pressure relief mechanism 2112, and the second convex rib 2114 is arranged on the side of the first convex rib 2113 away from the pressure relief mechanism 2112.
- the cover 2111 is covered on the opening 2121 of the shell 212.
- the outer contour shape of the cover 2111 is adapted to the shape of the opening 2121 of the shell 212.
- the cover 2111 and the shell 212 are enclosed together to form a receiving cavity for accommodating the electrode assembly 213 and the current collecting member 214, so as to protect the electrode assembly 213 and the current collecting member 214.
- the cover 2111 can be a flat plate structure to ensure the convenience of installation and connection stability of the cover 2111 and the shell 212.
- the material of the cover 2111 includes a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specifically limited here.
- the first convex rib 2113 and the second convex rib 2114 are components that play a role in strengthening the cover body 2111.
- the first convex rib 2113 and the second convex rib 2114 are both protruding along the thickness direction of the cover body 2111 (i.e., the Z direction shown in Figures 6 and 7).
- the first convex rib 2113 and the second convex rib 2114 can be made of materials with a certain strength, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specifically limited here.
- the first convex rib 2113, the second convex rib 2114 and the cover body 2111 can be formed independently, and then the first convex rib 2113 and the second convex rib 2114 are connected to the cover body 2111 respectively.
- the first convex rib 2113, the second convex rib 2114 and the cover 2111 can also be integrally formed, and there are many ways to integrally form the ribs, such as die-casting, casting, etc., which are not specifically limited here.
- first convex rib 2113, the second convex rib 2114 and the cover 2111 are integrally formed, the first convex rib 2113, the second convex rib 2114 and the cover 2111 are made of the same material.
- the pressure relief mechanism 2112 refers to a component used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value.
- the threshold value may be determined according to the design requirements of the battery cell 21. The above threshold value may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell 21.
- the pressure relief mechanism 2112 may take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, etc., which is not specifically limited here.
- the pressure relief mechanism 2112 includes a through hole portion 21121 and a weak structure 21122.
- the through hole portion 21121 penetrates the cover body 2111 along the thickness direction of the cover body 2111 (i.e., the Z direction shown in Figures 6 and 7).
- the weak structure 21122 is used to block the through hole portion 21121.
- the weak structure 21122 may be connected to the portion of the cover 2111 located on the outer peripheral side of the through hole portion 21121, or may be connected to the inner peripheral wall of the first rib 2113, or may be connected to the portion of the cover 2111 located on the outer peripheral side of the through hole portion 21121 and the inner peripheral wall of the first rib 2113 at the same time, or may be connected to the side of the first rib 2113 away from the cover 2111.
- the weak structure 21122 There are many ways to install the weak structure 21122, such as welding, bonding, etc., which are not specifically limited here.
- the weak structure 21122 When the internal pressure or temperature of the battery cell 21 is lower than the threshold value, the weak structure 21122 does not act to block the through hole portion 21121, so that the internal environment of the battery cell 21 is isolated from the external environment; when the internal pressure or temperature of the battery cell 21 reaches the threshold value, the weak structure 21122 is destroyed to connect the internal environment of the battery cell 21 with the external environment, so that the internal pressure of the battery cell 21 is released to the external environment of the battery cell 21.
- the first convex rib 2113 is arranged in an annular manner on the pressure relief mechanism 2112, which means that the first convex rib 2113 extends along the outer peripheral part of the pressure relief mechanism 2112 and is closed to form an annular structure.
- the annular structure can be a closed-loop structure or an open-loop structure, that is, the first convex rib 2113 includes at least two rib segments, and each rib segment is arranged separately from each other.
- the inner space of the annular structure can be referred to as the inner annular space of the first convex rib 2113
- the outer space of the annular structure can be referred to as the outer annular space of the first convex rib 2113.
- the through hole portion 21121 is located in the inner annular space of the first convex rib 2113, and the second convex rib 2114 is arranged on the side of the first convex rib 2113 away from the pressure relief mechanism 2112, which means that the second convex rib 2114 is located in the outer annular space of the first convex rib 2113.
- the end cover assembly 211 provided in the embodiment of the present application effectively increases the strength of the portion of the cover 2111 located on the outer peripheral side of the pressure relief mechanism 2112 by arranging the first rib 2113 and the second rib 2114 on the cover 2111, and the first rib 2113 is arranged around the pressure relief mechanism 2112 of the cover 2111, and the second rib 2114 is arranged on the side of the first rib 2113 away from the pressure relief mechanism 2112.
- FIG. 8 to FIG. 10 there are multiple second ribs 2114 , and second ribs 2114 are disposed on two opposite sides of the first rib 2113 .
- the number of the second convex ribs 2114 can be determined according to the design requirements of the battery cell 21. For example, referring to FIG8, the number of the second convex ribs 2114 is two, and one second convex rib 2114 is provided on opposite sides of the first convex rib 2113; for another example, referring to FIG9, the number of the second convex ribs 2114 is six, and three second convex ribs 2114 are provided on opposite sides of the first convex rib 2113; for another example, referring to FIG10, the number of the second convex ribs 2114 is four, and two second convex ribs 2114 are provided on opposite sides of the first convex rib 2113.
- the second convex ribs 2114 arranged on the same side of the first convex rib 2113 can be arranged parallel to each other or not.
- the opposite sides of the first convex rib 2113 may refer to the opposite sides of the first convex rib 2113 along the X direction shown in FIGS. 8 to 11, or may refer to the opposite sides of the first convex rib 2113 along the Y direction shown in FIGS. 8 to 11.
- the outer peripheral contour of the cover body 2111 is substantially a rectangular structure
- the X direction is the width direction of the cover body 2111
- the Y direction is the length direction of the cover body 2111. In other words, please refer to FIGS.
- the second convex rib 2114 may be provided on the opposite sides of the first convex rib 2113 along the width direction of the cover body 2111, or, please refer to FIG. 10, the second convex rib 2114 may be provided on the opposite sides of the first convex rib 2113 along the length direction of the cover body 2111.
- the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is further increased, so that the pressure relief mechanism 2112 can be opened more quickly to discharge the gas accumulated inside the battery cell 21 to the outside, thereby further reducing the risk of separation of the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of use of the battery cell 21.
- the first rib 2113 and the plurality of second ribs 2114 are distributed to form a symmetrical structure.
- the symmetrical structure can be an axisymmetric structure or a centrally symmetrical structure, wherein, when the first convex rib 2113 and the plurality of second convex ribs 2114 are distributed to form an axisymmetric structure, the axisymmetric structure can be an axisymmetric structure with the center line of the cover body 2111 extending along the Y direction as the axis of symmetry, or can be an axisymmetric structure with the center line of the cover body 2111 extending along the X direction as the axis of symmetry; when the first convex rib 2113 and the plurality of second convex ribs 2114 are distributed to form a centrally symmetrical structure, the centrally symmetrical structure refers to a centrally symmetrical structure with the axis of the pressure relief mechanism 2112 as the center of symmetry.
- the strength consistency on the two opposite sides of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is effectively improved, and the situation in which the overall force on the cover body 2111 is uneven due to the stress concentration on one side of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is effectively avoided, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- FIG. 11 there are multiple second ribs 2114 , and the multiple second ribs 2114 are distributed around the first rib 2113 .
- the plurality of second ribs 2114 being distributed around the first rib 2113 means that the plurality of second ribs 2114 are distributed in sequence along the outer periphery of the first rib 2113 at intervals, and the intervals between two adjacent second ribs 2114 may be equal or unequal.
- the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is further increased, so that the pressure relief mechanism 2112 can be opened more quickly to discharge the gas accumulated inside the battery cell 21 to the outside, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of use of the battery cell 21.
- the first rib 2113 and the plurality of second ribs 2114 are distributed to form a symmetrical structure.
- the strength consistency of each position of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is effectively improved, and the situation in which the overall force of the cover body 2111 is uneven due to the stress concentration on a certain position of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is effectively avoided, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the second rib 2114 extends from the first rib 2113 toward the edge of the cover 2111 .
- the second rib 2114 may extend along a straight line or a curve, which is not specifically limited herein.
- the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is further increased, so that the pressure relief mechanism 2112 can be opened more quickly to discharge the gas accumulated inside the battery cell 21 to the outside, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of use of the battery cell 21.
- one end of the second rib 2114 is connected to the first rib 2113 , and the other end of the second rib 2114 extends to the edge of the cover 2111 .
- the second rib 2114 starts from the first rib 2113 , extends toward the edge of the cover 2111 , and ends at the edge of the cover 2111 .
- the space between the first rib 2113 and the edge of the cover body 2111 can be utilized to the maximum extent to maximize the length of the second rib 2114, further increasing the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, so that the pressure relief mechanism 2112 can be opened more quickly to discharge the gas accumulated inside the battery cell 21 to the outside, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the end cover assembly 211 also includes a third rib 2115 arranged on the edge of the cover body 2111, and the side of the third rib 2115 facing away from the pressure relief mechanism 2112 is flush with the side wall of the cover body 2111.
- the side of the third rib 2115 facing away from the pressure relief mechanism 2112 is flush with the side wall of the cover body 2111, which means that the side of the third rib 2115 facing away from the pressure relief mechanism 2112 and the side wall of the cover body 2111 are on the same plane, and the side of the third rib 2115 facing away from the pressure relief mechanism 2112 and the side wall of the cover body 2111 together constitute the outer side wall of the end cover assembly 211.
- a technical means is usually adopted to increase the overall thickness of the cover body 2111 to increase the outer wall area of the cover body 2111, thereby increasing the welding area between the cover body 2111 and the battery cell 21.
- this will increase the internal space of the shell 212 of the battery cell 21 occupied by the cover body 2111, resulting in a decrease in the capacity of the battery cell 21.
- the third rib 2115 is arranged on the edge of the cover body 2111, the middle thickness of the cover body 2111 remains unchanged. Therefore, the welding area between the end cover assembly 211 and the shell 212 of the battery cell 21 can be effectively increased without occupying too much of the internal space of the shell 212 of the battery cell 21, thereby effectively increasing the welding strength between the end cover assembly 211 and the shell 212 of the battery cell 21, further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the third rib 2115 is disposed around the pressure relief mechanism 2112 .
- the third convex rib 2115 is arranged in an annular manner on the pressure relief mechanism 2112, which means that the third convex rib 2115 extends along the periphery of the cover body 2111 and is closed to form an annular structure.
- the annular structure can be a closed-loop structure or an open-loop structure, that is, the third convex rib 2115 includes at least two rib segments, and each rib segment is arranged separately from each other.
- the inner space of the annular structure can be referred to as the inner annular space of the third convex rib 2115
- the outer space of the annular structure can be referred to as the outer annular space of the third convex rib 2115.
- the pressure relief mechanism 2112, the first convex rib 2113 and the second convex rib 2114 are all located in the inner annular space of the third convex rib 2115.
- the outer peripheral wall of the end cover assembly 211 is arranged opposite to the inner peripheral wall of the shell 212 of the battery cell 21, and the outer peripheral wall of the end cover assembly 211 is welded to the inner peripheral wall of the shell 212 of the battery cell 21.
- the size of the weld mark between the outer wall of the end cover assembly 211 and the inner wall of the shell 212 of the battery cell 21 becomes more uniform, so that the force on the outer wall of the end cover assembly 211 becomes more uniform, and the welding strength between the end cover assembly 211 and the shell 212 of the battery cell 21 is further increased.
- the overall structural strength of the cover body 2111 is further increased, and the deformation amplitude of the cover body 2111 when the internal pressure of the battery cell 21 is high is further reduced, thereby further reducing the risk of separation of the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the second rib 2114 is connected between the first rib 2113 and the third rib 2115 .
- the second rib 2114 starts from the first rib 2113 , extends toward the third rib 2115 , and ends at the third rib 2115 .
- the overall structural strength of the cover body 2111 is further increased, and the deformation amplitude of the cover body 2111 when the internal pressure of the battery cell 21 is high is further reduced, thereby further reducing the risk of separation of the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the end cover assembly 211 further includes a fourth rib 2116 disposed on the cover body 2111 .
- the fourth rib 2116 is disposed around the pressure relief mechanism 2112 and is located between the first rib 2113 and the third rib 2115 .
- the fourth convex rib 2116 is arranged in an annular manner on the pressure relief mechanism 2112, which means that the fourth convex rib 2116 extends along the outer periphery of the pressure relief mechanism 2112 and is closed to form an annular structure.
- the annular structure can be a closed-loop structure or an open-loop structure, that is, the fourth convex rib 2116 includes at least two rib segments, and each rib segment is arranged separately from each other.
- the inner space of the annular structure can be referred to as the inner annular space of the fourth convex rib 2116
- the outer space of the annular structure can be referred to as the outer annular space of the fourth convex rib 2116.
- the fourth rib 2116 being located between the first rib 2113 and the third rib 2115 means that the fourth rib 2116 is located in the inner annular space of the third rib 2115 , and the first rib 2113 is located in the inner annular space of the fourth rib 2116 .
- the fourth rib 2116 is connected to the second rib 2114 .
- the second rib 2114 passes through the fourth rib 2116 from the first rib 2113 and is connected to the third rib 2115 .
- the overall structural strength of the cover body 2111 is further increased, and the deformation amplitude of the cover body 2111 when the internal pressure of the battery cell 21 is high is further reduced, thereby further reducing the risk of separation of the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- the plurality of fourth ribs 2116 are nested with each other, that is, one fourth rib 2116 is located in the inner ring space of another fourth rib 2116, and so on.
- the number of fourth ribs 2116 can be determined according to the design requirements of the battery cell 21, such as two or three, and is not specifically limited here.
- the overall structural strength of the cover body 2111 is further increased, and the deformation amplitude of the cover body 2111 when the internal pressure of the battery cell 21 is high is further reduced, thereby further reducing the risk of separation of the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of the battery cell 21.
- a protruding height h1 of the third rib 2115 relative to the surface of the cover body 2111 is 0.2 mm-3 mm.
- the protruding height h1 of the third rib 2115 refers to the dimension of the third rib 2115 along the thickness direction of the cover body 2111 (i.e., the Z direction shown in FIG. 7 ).
- the protruding height h1 of the third rib 2115 can be determined according to the design requirements of the battery cell 21 , and specifically can be 0.2 mm, 1.5 mm, 3 mm, etc., and is not specifically limited here.
- the function of the third rib 2115 is to increase the welding area between the end cap assembly 211 and the shell 212, if the protruding height h1 of the third rib 2115 is too small, the increase in the welding area between the end cap assembly 211 and the shell 212 is small, and the effect of improving the welding strength between the end cap assembly 211 and the shell 212 is not obvious. If the protruding height h1 of the third rib 2115 is too large, the third rib 2115 will interfere with the current collecting member 214, the electrode assembly 213 and other components inside the battery cell 21.
- the third rib 2115 can effectively increase the welding area between the end cap assembly 211 and the shell 212, thereby improving the welding strength between the end cap assembly 211 and the shell 212, and it can also prevent the third rib 2115 from interfering with other components due to the excessive protruding height h1.
- the width W1 of the third rib 2115 is 0.3 mm-8 mm.
- the width W1 of the third rib 2115 refers to the dimension of the third rib 2115 along a direction perpendicular to the extension direction of the third rib 2115 and perpendicular to the thickness direction of the cover body 2111 (i.e., the Z direction shown in FIG. 7 ).
- the width W1 of the third rib 2115 can be determined according to the design requirements of the battery cell 21, and specifically can be 0.3 mm, 4 mm, 8 mm, etc., and is not specifically limited here.
- the third rib 2115 needs to be welded to the shell 212, if the width W1 of the third rib 2115 is too small, the third rib 2115 will be melted by high temperature, resulting in failure of the third rib 2115. If the width W1 of the third rib 2115 is too large, the third rib 2115 will interfere with the insulating member and other components in the end cover assembly 211. By limiting the width W1 of the third rib 2115 to the above range, it can be ensured that the third rib 2115 can effectively increase the welding strength between the end cover assembly 211 and the shell 212, and can also prevent the third rib 2115 from interfering with other components due to the excessive width W1.
- the cover body 2111 has a first surface 21111 and a second surface 21112 arranged opposite to each other, the through hole portion 21121 passes through the first surface 21111 and the second surface 21112, the first rib 2113 and the second rib 2114 are both arranged on the first surface 21111, and the end cover assembly 211 also includes a fifth rib 2117 arranged on the second surface 21112, and the fifth rib 2117 is arranged around the pressure relief mechanism 2112.
- the first surface 21111 and the second surface 21112 are two surfaces of the cover 2111 along the thickness direction (i.e., the Z direction shown in FIG. 7 ), wherein the first surface 21111 may be the surface of the cover 2111 facing the internal environment of the battery cell 21, or the surface of the cover 2111 facing away from the internal environment of the battery cell 21.
- the first surface 21111 is the surface of the cover 2111 facing the internal environment of the battery cell 21, and the second surface 21112 is the surface of the cover 2111 facing away from the internal environment of the battery cell 21.
- the first rib 2113 and the second rib 2114 are both protrudingly arranged on the first surface 21111, and the fifth rib 2117 is protrudingly arranged on the second surface 21112.
- the cover 2111 further includes the third rib 2115 and the fourth rib 2116
- the third rib 2115 and the fourth rib 2116 are both protrudingly arranged on the first surface 21111.
- the fifth convex rib 2117 is arranged around the pressure relief mechanism 2112, which means that the fifth convex rib 2117 extends along the outer periphery of the pressure relief mechanism 2112 and is closed to form a ring-shaped structure.
- the ring-shaped structure can be a closed-loop structure or an open-loop structure, that is, the fifth convex rib 2117 includes at least two rib segments, and each rib segment is arranged separately from each other.
- the inner space of the ring-shaped structure can be referred to as the inner ring space of the fifth convex rib 2117
- the outer space of the ring-shaped structure can be referred to as the outer ring space of the fifth convex rib 2117.
- the through hole portion 21121 is located in the inner ring space of the fifth convex rib 2117.
- the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112 is further increased, so that the pressure relief mechanism 2112 can be opened more quickly to discharge the gas accumulated inside the battery cell 21 to the outside, thereby further reducing the risk of separation between the cover body 2111 and the shell 212 of the battery cell 21, and further improving the safety of use of the battery cell 21.
- the end cover assembly 211 may further include a sixth rib (not shown in the figure), which is arranged on the second surface 21112 and is located on the side of the fifth rib 2117 away from the pressure relief mechanism 2112.
- the sixth rib may be arranged in a ring around the fifth rib 2117, or extend in a direction from the fifth rib 2117 toward the edge of the cover body 2111.
- the protruding height h2 of the first rib 2113 is 0.2 mm-6 mm.
- the protruding height h2 of the first rib 2113 refers to the dimension of the first rib 2113 along the thickness direction of the cover body 2111 (i.e., the Z direction shown in FIG. 7 ).
- the protruding height of the first rib 2113 can be determined according to the design requirements of the battery cell 21 , and specifically can be 0.2 mm, 3 mm, 6 mm, etc., and is not specifically limited here.
- the function of the first rib 2113 is to increase the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, if the protruding height h2 of the first rib 2113 is too small, the first rib 2113 will not have a significant reinforcing effect on the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, and if the protruding height h2 of the first rib 2113 is too large, the first rib 2113 will interfere with the insulating member and other components in the end cover assembly 211.
- the protruding height h2 of the first rib 2113 By limiting the protruding height h2 of the first rib 2113 to the above range, it can be ensured that the first rib 2113 can have a sufficient reinforcing effect on the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, and it can also prevent the first rib 2113 from interfering with other components due to the excessive protruding height h2.
- the width W2 of the first rib 2113 is 0.5 mm-10 mm.
- the width W2 of the first rib 2113 refers to the dimension of the first rib 2113 along a direction perpendicular to the extension direction of the first rib 2113 and perpendicular to the thickness direction of the cover body 2111 (i.e., the Z direction shown in FIG. 7 ).
- the width of the first rib 2113 can be determined according to the design requirements of the battery cell 21, and specifically can be 0.5 mm, 5 mm, 10 mm, etc., and is not specifically limited here.
- the function of the first rib 2113 is to increase the strength of the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, if the width W2 of the first rib 2113 is too small, the first rib 2113 will not significantly strengthen the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, and if the width W2 of the first rib 2113 is too large, the first rib 2113 will interfere with the insulating member and other components in the end cover assembly 211.
- the width W2 of the first rib 2113 By limiting the width W2 of the first rib 2113 to the above range, it can be ensured that the first rib 2113 can have a sufficient reinforcing effect on the portion of the cover body 2111 located on the outer peripheral side of the pressure relief mechanism 2112, and it can also prevent the first rib 2113 from interfering with other components due to the excessive width W2.
- the embodiment of the present application further provides a battery cell 21 , including a shell 212 and an end cover assembly 211 of any of the above embodiments, wherein the cover body 2111 is covered on the shell 212 .
- the battery cell 21 provided in the embodiment of the present application adopts the end cover assembly 211 of any of the above embodiments, thereby effectively improving the safety of the battery cell 21 in use.
- the embodiment of the present application further provides a battery 100 including the battery cell 21 mentioned above.
- the battery 100 provided in the embodiment of the present application adopts the above-mentioned battery cell 21, thereby effectively improving the safety of the battery 100.
- an embodiment of the present application further provides an electrical device, including the battery 100 mentioned above.
- the electric device provided in the embodiment of the present application adopts the above-mentioned battery 100, thereby effectively improving the safety of use of the electric device.
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Abstract
本申请公开一种端盖组件（211）、电池单体（21）、电池（100）及用电装置，该端盖组件（211）包括盖体（2111）、第一凸筋（2113）和第二凸筋（2114），盖体（2111）设有泄压机构（2112），第一凸筋（2113）和第二凸筋（2114）均设置于盖体（21111）上，第一凸筋（2113）环设于泄压机构（2112），第二凸筋（2114）设置于第一凸筋（2113）的背离泄压机构（2112）的一侧。通过采用上述技术方案，有效提高了电池单体（21）的使用安全性。
Description
本申请涉及电池技术领域，具体涉及一种端盖组件、电池单体、电池以及用电装置。
电池单体广泛用于电子设备，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。在电池技术的发展过程中，除了需要关注电池单体的性能外，电池单体的使用安全性也是一个不可忽视的问题。
然而，由于电池单体在充放电过程中会产生气体，当电池单体出现急剧产气的情况时，电池单体的内部压力会快速升高，而此时经常出现因电池单体的泄压机构没有及时打开而造成电池单体的盖体与壳体相互分离的情况，导致电池单体的使用安全性下降。
本申请实施例的目的之一在于：提供一种端盖组件、电池单体、电池以及用电装置，以解决相关技术中由于电池单体的泄压机构没有及时打开而导致电池单体的使用安全性下降的技术问题。
为解决上述技术问题，本申请实施例采用的技术方案是：
第一方面，本申请实施例提供了一种端盖组件，包括：
盖体，设有泄压机构；
第一凸筋，设置于所述盖体上，且环设于所述泄压机构；以及
第二凸筋，设置于所述盖体上，且设于所述第一凸筋的背离所述泄压机构的一侧。
本申请实施例提供的端盖组件的有益效果在于：本申请实施例提供的端盖组件通过将第一凸筋和第二凸筋设置于盖体上，并且使第一凸筋环设于泄压机构以及使第二凸筋设置于第一凸筋的背离泄压机构的一侧，从而有效增加盖体位于泄压机构的外周侧的部位的强度，如此，即使电池单体的内部压力较高，盖体位于泄压机构的外周侧的部位也不会出现大幅度变形的情况，使得应力能够有效集中在泄压机构的薄弱结构上，使得泄压机构能够及时打开以将积聚在电池单体内部的气体向外排出，从而有效降低了盖体与电池单体的壳体相互分离的风险，有效提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第二凸筋的数量为多个，所述第一凸筋的相对两侧均设有所述第二凸筋。
通过采用上述技术方案，进一步增加了盖体位于泄压机构的外周侧的部位的强度，使得泄压机构能够更加迅速地打开以将积聚在电池单体内部的气体向外排出，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第一凸筋与多个所述第二凸筋分布形成对称结构。
通过采用上述技术方案，有效提高了盖体位于泄压机构的外周侧的部位的相对两侧的强度一致性，有效避免因应力集中在盖体位于泄压机构的外周侧的部位的某一侧而导致出现盖体整体受力不均匀的情况，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第二凸筋的数量为多个，多个所述第二凸筋围绕所述第一凸筋分布。
通过采用上述技术方案，进一步增加了盖体位于泄压机构的外周侧的部位的强度，使得泄压机构能够更加迅速地打开以将积聚在电池单体内部的气体向外排出，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第一凸筋与多个所述第二凸筋分布形成对称结构。
通过采用上述技术方案，有效提高了盖体位于泄压机构的外周侧的部位的各个位置的强度一致性，有效避免因应力集中在盖体位于泄压机构的外周侧的部位的某一位置上而导致出现盖体整体受力不均匀的情况，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第二凸筋沿自所述第一凸筋朝所述盖体的边缘的方向延伸。
通过采用上述技术方案，进一步增加了盖体位于泄压机构的外周侧的部位的强度，使得泄压机构能够更加迅速的打开以将积聚在电池单体内部的气体向外排出，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第二凸筋的一端与所述第一凸筋相连接，所述第二凸筋的另一端延伸至所述盖体的边缘上。
通过采用上述技术方案，进一步增加了盖体位于泄压机构的外周侧的部位的强度，使得泄压机构能够更加迅速的打开以将积聚在电池单体内部的气体向外排出，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述端盖组件还包括设置于所述盖体的边缘上的第三凸筋，所述第三凸筋的背离所述泄压机构的一侧与所述盖体的侧壁相齐平。
通过采用上述技术方案，可以在不过多地占用电池单体的壳体的内部空间的情况下，有效增加了端盖组件与电池单体的壳体之间的焊接面积，从而有效增加了端盖组件与电池单体的壳体之间的焊接强度，进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第三凸筋环设于所述泄压机构。
通过采用上述技术方案，使得端盖组件的外周壁与电池单体的壳体的内周壁之间的焊痕大小变得更加均匀，从而使得端盖组件的外周壁受力变得更加均匀，进一步增加了端盖组件与电池单体的壳体之间的焊接强度，同时进一步增加了盖体的整体结构强度，进一步减少了在电池单体的内部压力较高时盖体的变形幅度，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第二凸筋连接于所述第一凸筋和所述第三凸筋之间。
通过采用上述技术方案，进一步增加了盖体的整体结构强度，进一步减少了在电池单体的内部压力较高时盖体的变形幅度，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述端盖组件还包括设置于所述盖体上的第四凸筋，所述第四凸筋环设于所述泄压机构且位于所述第一凸筋和所述第三凸筋之间。
通过采用上述技术方案，进一步增加了盖体的整体结构强度，进一步减少了在电池单体的内部压力较高时盖体的变形幅度，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第四凸筋的数量为多个。
通过采用上述技术方案，进一步增加了盖体的整体结构强度，进一步减少了在电池单体的内部压力较高时盖体的变形幅度，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第三凸筋相对所述盖体表面的凸出高度为0.2mm-3mm。
通过采用上述技术方案，既可保证第三凸筋能够有效增加端盖组件与壳体之间的焊接面积，也可防止第三凸筋因凸出高度过大而与其它部件产生干涉。
在本申请的一些实施例中，所述第三凸筋的宽度为0.3mm-8mm。
通过采用上述技术方案，既可保证第三凸筋能够有效增加端盖组件与壳体之间的焊接强度，也可防止第三凸筋因宽度过大而与其它部件产生干涉。
在本申请的一些实施例中，所述盖体具有相背离设置的第一表面和第二表面，所述第一凸筋和所述第二凸筋均设置于所述第一表面，所述端盖组件还包括设置于所述第二表面上的第五凸筋，所述第五凸筋环设于所述泄压机构。
通过采用上述技术方案，进一步增加了盖体位于泄压机构的外周侧的部位的强度，使得泄压机构能够更加迅速的打开以将积聚在电池单体内部的气体向外排出，从而进一步降低了盖体与电池单体的壳体相互分离的风险，进一步提高了电池单体的使用安全性。
在本申请的一些实施例中，所述第一凸筋相对所述盖体表面的凸出高度为0.2mm-6mm。
通过采用上述技术方案，既可保证第一凸筋能够对盖体位于泄压机构的外周侧的部位产生足够的加强作用，也可防止第一凸筋因凸出高度过大而与其它部件产生干涉。
在本申请的一些实施例中，所述第一凸筋的宽度为0.5mm-10mm。
通过采用上述技术方案，既可保证第一凸筋能够对盖体位于泄压机构的外周侧的部位产生足够的加强作用，也可防止第一凸筋因宽度过大而与其它部件产生干涉。
第二方面，本申请实施例提供了一种电池单体，包括壳体和上述任一个实施例所述的端盖组件，所述盖体盖设于所述壳体。
本申请实施例提供的电池单体的有益效果在于：本申请实施例提供的电池单体由于采用了上述任一个实施例所述的端盖组件，从而有效提高了该电池单体的使用安全性。
第三方面，本申请实施例提供一种电池，包括上述电池单体。
本申请实施例提供的电池的有益效果在于：本申请实施例提供的电池由于采用了上述电池单体，从而有效提高了该电池的使用安全性。
第四方面，本申请实施例提供一种用电装置，包括上述电池。
本申请实施例提供的用电装置的有益效果在于：本申请实施例提供的用电装置由于采用了上述电池，从而有效提高了该用电装置的使用安全性。
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请实施例提供的车辆的结构示意图；
图2为本申请实施例提供的电池的爆炸示意图；
图3为本申请实施例提供的电池模块的结构示意图；
图4为本申请实施例提供的电池单体的结构示意图；
图5为图4所示的电池单体的爆炸示意图；
图6为图5所示的电池单体中的端盖组件的结构示意图；
图7为图6所示的端盖组件沿A-A线方向的剖视结构示意图；
图8为本申请一实施例提供端盖组件去掉薄弱结构和电机端子后的结构示意图；
图9为本申请另一实施例提供端盖组件去掉薄弱结构和电机端子后的结构示意图；
图10为本申请又一实施例提供端盖组件去掉薄弱结构和电机端子后的结构示意图；
图11为本申请再一实施例提供端盖组件去掉薄弱结构和电机端子后的结构示意图；
图12为本申请再一实施例提供端盖组件去掉薄弱结构和电机端子后的结构示意图；
图13为图4所示的电池单体的主视结构示意图；
图14为图13所示的电池单体沿B-B线方向的剖视结构示意图；
图15为图14所示的电池单体的C处放大结构示意图。
附图标记说明：
1000、车辆；
100、电池；
10、箱体；11、第一部分；12、第二部分；13、容纳空间；
20、电池模块；21、电池单体；211、端盖组件；2111、盖体；21111、第一表面；21112、第二表面；2112、泄压机构；21121、通孔部；21122、薄弱结构；2113、第一凸筋；2114、第二凸筋；2115、第三凸筋；2116、第四凸筋；2117、第五凸筋；2118、电极端子；212、壳体；2121、开口；213、电极组件；214、集流构件；
200、控制器；
300、马达。
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需说明的是，当部件被称为“固定于”或“设置于”另一个部件，它可以直接在另一个部件上或者间接在该另一个部件上。当一个部件被称为是“连接于”另一个部件，它可以是直接或者间接连接至该另一个部件上。术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。术语“第一”、“第二”、“第三”、“第四”、“第五”、“第六”仅用于便于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明技术特征的数量。“多个”的含义是两个或两个以上，除非另有明确具体的限定。
电池单体是指包括壳体、盖体、泄压机构、电极组件等部件的最小电能存储单元，电池单体可通过串联、并联、串并联等方式排列组成电池。随着新能源汽车市场的快速发展，电池作为新能源汽车的动力来源，其使用安全性对整个车辆系统而言显得尤为重要，而电池单体的使用安全性是决定电池的使用安全性是否符合要求的关键因素。
本申请的发明人注意到，电池单体的端盖组件中的盖体与壳体通常是采用焊接方式实现连接的，电池单体在充放电过程中会产生气体，当电池单体受到破坏或者出现故障时，电池单体会出现急剧产气的情况，使得电池单体的内部压力快速升高，此时，由于盖体的受力面积较大，盖体需要承受较大的压力而导致盖体出现变形的情况，盖体的用于安装泄压机构的部位也会随之发生变形，使得应力无法有效集中在泄压机构的薄弱结构上而导致泄压机构无法及时打开，随着电池单体的内部压力进一步升高，盖体与壳体之间的焊缝会逐渐断裂，最终导致盖体与壳体相互分离，电池单体内的活性物质向外喷出，容易引发起火事故。由此可见，传统的电池单体的使用安全性还有待提高。
为了提高电池单体的使用安全性，本申请的发明人经过深入研究，设计了一种端盖组件，该端盖组件包括盖体、第一凸筋和第二凸筋，盖体设有泄压机构，第一凸筋和第二凸筋均设置于盖体上，并且使第一凸筋环设于盖体的泄压机构以及使第二凸筋设置于第一凸筋的背离泄压机构的一侧，从而有效增加盖体位于泄压机构的外周侧的部位的强度，如此，即使电池单体的内部气压较高，盖体位于泄压机构的外周侧的部位也不会出现大幅度变形的情况，使得应力能够有效集中在泄压机构的薄弱结构上，从而使得泄压机构能够及时打开以将积聚在电池单体内部的气体向外排出，有效降低了盖体与电池单体的壳体相互分离的风险，有效提高了电池单体的使用安全性。
本申请实施例提供一种使用电池100作为电源的用电装置，用电装置包括但不仅限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆1000为例进行说明。
请参阅图1，图为本申请实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请的一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参阅图2，图为本申请实施例提供的电池100的爆炸示意图。电池100包括箱体10和电池单体21，电池单体21容纳于箱体10内。其中，箱体10用于为电池单体21提供容纳空间13，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体21的容纳空间13。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖设于第二部分12的开口侧，以使第一部分11与第二部分12共同限定出容纳空间13；第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖设于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体21可以是多个，多个电池单体21之间可串联或并联或混联，混联是指多个电池单体21中既有串联又有并联。多个电池单体21之间可直接串联或并联或混联在一起，再将多个电池单体21构成的整体容纳于箱体10内。当然，请一并参阅图2及图3，电池100也可以是多个电池单体21先串联或并联或混联组成电池模块20，多个电池模块20再串联或并联或混联形成一个整体，并容纳于箱体10内。
其中，每个电池单体21可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体21也可呈圆柱体、扁平体、长方体或其它形状等。
请一并参阅图4及图5，图4为本申请实施例提供的电池单体21的结构示意图，图5为图4所示的电池单体21的爆炸示意图。电池单体21是指组成电池100的最小电能存储单元。电池单体21包括端盖组件211、壳体212、电极组件213、集流构件214以及其他的功能性部件。
端盖组件211是指盖设于壳体212的开口2121处以将电池单体21的内部环境隔绝于外部环境的部件。端盖组件211的形状可以与壳体212的形状相适应以配合壳体212。可选地，端盖组件211的材质包含多种，例如铜、铁、铝、不锈钢、铝合金、塑胶等，在此不作具体限定。
在本申请的一些实施例中，端盖组件211上可以设置有如电极端子2118等的功能性部件。电极端子2118可以用于与电极组件213电连接，以用于输出或输入电池单体21的电能。
在本申请的一些实施例中，端盖组件211上还可以设置有用于在电池单体21的内部压力或温度达到阈值时释放内部压力的泄压机构2112。在一些实施例中，在端盖组件211还可以设置有绝缘件，绝缘件可以用于隔离壳体212内的电连接部件与端盖组件211，以降低短路的风险。绝缘件的材质可以包含多种，例如塑料、橡胶或有机材料薄膜等，在此不作具体限定。
壳体212是用于提供电池单体21的内部环境的部件，其中，该内部环境可以用于容纳电极组件213、集流构件214、电解液以及其它部件。壳体212可以是独立的部件，可以于壳体212上设置开口2121，通过将端盖组件211盖设于该开口2121以形成电池单体21的内部环境，电极组件213、集流构件214等部件容置于该内部环境中。具体地，端盖组件211和壳体212可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体212的内部时，再将端盖组件211盖设于壳体212的开口2121。可选地，壳体212可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。壳体212的材质包含多种，例如铜、铁、铝、不锈钢、铝合金等，在此不作具体限定。
电极组件213是电池单体21中发生电化学反应的部件。电池单体21可以包含一个或多个电极组件213。电极组件213主要由正极片、负极片和隔膜采用卷绕工艺或者层叠工艺制成。隔膜用于将正极片和负极片绝缘分隔。正极片和负极片具有活性物质的部分构成电极组件213的主体部位，正极片不具有活性物质的部分所构成极耳为正极极耳，负极片不具有活性物质的部分所构成极耳为负极极耳。正极极耳和负极极耳可以共同位于电极组件213的主体部位的一端或是分别位于电极组件213的主体部位的两端。在电池单体21的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳与集流构件214电连接，集流构件214与电极端子2118电连接以形成电流回路。
集流构件214是电极组件213和电极端子2118之间的导电连接介质，集流构件214起到将电极组件213的电流引出至电极端子2118的作用，以实现电极组件213与电极端子2118之间的电连接。具体地，集流构件214可以通过焊接、抵接或粘接等方式与电极组件213的极耳相连接，以实现集流构件214与电极组件213电连接。可选地，集流构件214的材质包含多种，例如铜、铁、铝、钢、铝合金等。集流构件214的形状包含多种，例如圆形、多边形等，在此不作具体限定。
为了说明本申请所提供的技术方案，以下结合具体附图及实施例进行详细说明。
请一并参阅图6至图12，该端盖组件211包括盖体2111、第一凸筋2113和第二凸筋2114。盖体2111设有泄压机构2112，第一凸筋2113和第二凸筋2114均设置于盖体2111上，第一凸筋2113环设于泄压机构2112，第二凸筋2114设置于第一凸筋2113的背离泄压机构2112的一侧。
盖体2111盖设于壳体212的开口2121，盖体2111的外周轮廓形状与壳体212的开口2121的形状相适应，盖体2111与壳体212共同围合形成用于容纳电极组件213和集流构件214的容纳腔，以形成对电极组件213和集流构件214的保护。盖体2111可以是平板状结构，保证盖体2111与壳体212安装的便利性以及连接稳定性。可选地，盖体2111的材质包含多种，例如铜、铁、铝、不锈钢、铝合金、塑胶等，在此不作具体限定。
第一凸筋2113和第二凸筋2114是指对盖体2111起到加强作用的部件，第一凸筋2113和第二凸筋2114均沿盖体2111的厚度方向（即图6及图7所示的Z方向）凸出设置。第一凸筋2113和第二凸筋2114均可以使用具有一定的强度的材料制成，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，在此不作具体限定。第一凸筋2113、第二凸筋2114和盖体2111可以分别独立成型，然后将第一凸筋2113和第二凸筋2114分别连接于盖体2111上，第一凸筋2113和第二凸筋2114与盖体2111之间的连接方式包含多种，例如焊接、粘接等，在此不作具体限定。第一凸筋2113、第二凸筋2114和盖体2111也可以一体成型，一体成型方式包含多种，例如压铸成型、浇铸成型等，在此不作具体限定。可以理解地，当第一凸筋2113、第二凸筋2114和盖体2111一体成型时，第一凸筋2113、第二凸筋2114和盖体2111采用同种材料制成。
泄压机构2112是指用于在电池单体21的内部压力或温度达到阈值时释放内部压力的部件。该阈值可根据电池单体21的设计需求而定。上述阈值可以取决于电池单体21内的正极极片、负极极片、电解质和隔离件中一种或几种的材料。可选地，泄压机构2112可以采用诸如防爆阀、气阀、泄压阀或安全阀等的形式，在此不作具体限定。具体地，泄压机构2112包括通孔部21121和薄弱结构21122。通孔部21121沿盖体2111的厚度方向（即图6及图7所示的Z方向）贯穿盖体2111。薄弱结构21122用于将通孔部21121封堵。可选地，薄弱结构21122可以与盖体2111位于通孔部21121的外周侧的部位相连接，也可以与第一凸筋2113的内周壁相连接，又可以同时与盖体2111的位于通孔部21121的外周侧的部位以及第一凸筋2113的内周壁相连接，还可以与第一凸筋2113的背离盖体2111的一侧相连接。薄弱结构21122安装方式包含多种，例如焊接、粘接等，在此不作具体限定。当电池单体21的内部压力或温度低于阈值时，薄弱结构21122不动作，以封堵通孔部21121，使得电池单体21的内部环境隔绝于外部环境；当电池单体21的内部压力或温度达到阈值时，薄弱结构21122被破坏，以使电池单体21的内部环境与外部环境相连通，从而使得电池单体21的内部压力向电池单体21的外部环境释放。
第一凸筋2113环设于泄压机构2112是指第一凸筋2113沿泄压机构2112的外周部位延伸并且闭合形成环状结构。环状结构可以是闭环结构，也可以是开环结构，即第一凸筋2113包括至少两个筋段，各个筋段相互分隔设置。为了便于描述，可以将该环状结构的内侧空间称为第一凸筋2113的内环空间，将该环状结构的外侧空间称为第一凸筋2113的外环空间。通孔部21121位于第一凸筋2113的内环空间内，第二凸筋2114设置于第一凸筋2113的背离泄压机构2112的一侧是指第二凸筋2114位于第一凸筋2113的外环空间。
本申请实施例提供的端盖组件211通过将第一凸筋2113和第二凸筋2114设置于盖体2111上，并且使第一凸筋2113环设于盖体2111的泄压机构2112以及使第二凸筋2114设置于第一凸筋2113的背离泄压机构2112的一侧，从而有效增加盖体2111位于泄压机构2112的外周侧的部位的强度，如此，即使电池单体21的内部压力较高，盖体2111位于泄压机构2112的外周侧的部位也不会出现大幅度变形的情况，使得应力能够有效集中在泄压机构2112的薄弱结构21122上，使得泄压机构2112能够及时打开以将积聚在电池单体21内部的气体向外排出，从而有效降低了盖体2111与电池单体21的壳体212相互分离的风险，有效提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图10，第二凸筋2114的数量为多个，第一凸筋2113的相对两侧均设有第二凸筋2114。
第二凸筋2114的数量可以根据电池单体21的设计需求而定，例如，请参阅图8，第二凸筋2114的数量为两个，第一凸筋2113的相对两侧均设有一个第二凸筋2114；又如，请参阅图9，第二凸筋2114的数量为六个，第一凸筋2113的相对两侧均设有三个第二凸筋2114；再如，请参阅图10，第二凸筋2114的数量为四个，第一凸筋2113的相对两侧均设有两个第二凸筋2114。设置在第一凸筋2113的同一侧的各个第二凸筋2114可以相互平行设置，也可以不平行设置。
第一凸筋2113的相对两侧可以是指第一凸筋2113沿图8至图11所示的X方向的相对两侧，也可以是指第一凸筋2113沿图8至图11所示的Y方向的相对两侧。当电池单体21呈长方体结构时，盖体2111的外周轮廓大致呈长方形结构，上述X方向即为盖体2111的宽度方向，上述Y方向即为盖体2111的长度方向，换言之，请一并参阅图8及图9，可以在第一凸筋2113沿盖体2111的宽度方向的相对两侧均设有该第二凸筋2114，或者，请参阅图10，也可以在第一凸筋2113沿盖体2111的长度方向的相对两侧均设有该第二凸筋2114。
通过采用上述技术方案，进一步增加了盖体2111位于泄压机构2112的外周侧的部位的强度，使得泄压机构2112能够更加迅速地打开以将积聚在电池单体21内部的气体向外排出，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图10，第一凸筋2113与多个第二凸筋2114分布形成对称结构。
对称结构可以是轴对称结构，也可以是中心对称结构，其中，当第一凸筋2113与多个第二凸筋2114分布形成轴对称结构时，该轴对称结构可以是以盖体2111沿Y方向延伸的中线为对称轴线的轴对称结构，也可以是以盖体2111的沿X方向延伸的中线为对称轴线的轴对称结构；当第一凸筋2113与多个第二凸筋2114分布形成中心对称结构时，该中心对称结构是指以泄压机构2112的轴心为对称中心的中心对称结构。
通过采用上述技术方案，有效提高了盖体2111位于泄压机构2112的外周侧的部位的相对两侧的强度一致性，有效避免因应力集中在盖体2111位于泄压机构2112的外周侧的部位的某一侧而导致出现盖体2111整体受力不均匀的情况，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请参阅图11，第二凸筋2114的数量为多个，多个第二凸筋2114围绕第一凸筋2113分布。
多个第二凸筋2114围绕第一凸筋2113分布是指多个第二凸筋2114沿第一凸筋2113的外周缘依次间隔分布，相邻两个第二凸筋2114之间的间距可以相等，也可以不相等。
通过采用上述技术方案，进一步增加了盖体2111位于泄压机构2112的外周侧的部位的强度，使得泄压机构2112能够更加迅速地打开以将积聚在电池单体21内部的气体向外排出，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请参阅图11，第一凸筋2113与多个第二凸筋2114分布形成对称结构。
通过采用上述技术方案，有效提高了盖体2111位于泄压机构2112的外周侧的部位的各个位置的强度一致性，有效避免因应力集中在盖体2111位于泄压机构2112的外周侧的部位的某一位置上而导致出现盖体2111整体受力不均匀的情况，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图11，第二凸筋2114沿自第一凸筋2113朝盖体2111的边缘的方向延伸。
可选地，第二凸筋2114可以沿直线延伸，也可以沿曲线延伸，在此不作具体限定。
通过采用上述技术方案，进一步增加了盖体2111位于泄压机构2112的外周侧的部位的强度，使得泄压机构2112能够更加迅速的打开以将积聚在电池单体21内部的气体向外排出，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图11，第二凸筋2114的一端与第一凸筋2113相连接，第二凸筋2114的另一端延伸至盖体2111的边缘上。
换言之，第二凸筋2114起始于第一凸筋2113朝盖体2111的边缘延伸并终止于盖体2111的边缘上。
通过采用上述技术方案，可最大限度地利用第一凸筋2113与盖体2111的边缘之间的空间，以实现第二凸筋2114的长度最大化，进一步增加了盖体2111位于泄压机构2112的外周侧的部位的强度，使得泄压机构2112能够更加迅速的打开以将积聚在电池单体21内部的气体向外排出，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图6及图7，端盖组件211还包括设置于盖体2111的边缘上的第三凸筋2115，第三凸筋2115的背离泄压机构2112的一侧与盖体2111的侧壁相齐平。
第三凸筋2115的背离泄压机构2112的一侧与盖体2111的侧壁相齐平是指第三凸筋2115的背离泄压机构2112的一侧与盖体2111的侧壁处于同一平面上，第三凸筋2115的背离泄压机构2112的一侧与盖体2111的侧壁共同构成端盖组件211的外侧壁。
在相关技术中，通常会采用增加盖体2111的整体厚度的技术手段，以增加盖体2111的外侧壁面积，从而增加盖体2111与电池单体21之间的焊接面积，但是这样会增加盖体2111所占用的电池单体21的壳体212的内部空间，导致电池单体21的电容量下降。
通过采用上述技术方案，由于第三凸筋2115设置在盖体2111的边缘位置上，盖体2111的中部厚度不变，因此可以在不过多地占用电池单体21的壳体212的内部空间的情况下，有效增加了端盖组件211与电池单体21的壳体212之间的焊接面积，从而有效增加了端盖组件211与电池单体21的壳体212之间的焊接强度，进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图11，第三凸筋2115环设于泄压机构2112。
第三凸筋2115环设于泄压机构2112是指第三凸筋2115沿盖体2111的周缘延伸并且闭合形成环状结构。环状结构可以是闭环结构，也可以是开环结构，即第三凸筋2115包括至少两个筋段，各个筋段相互分隔设置。为了便于描述，可以将该环状结构的内侧空间称为第三凸筋2115的内环空间，将该环状结构的外侧空间称为第三凸筋2115的外环空间。泄压机构2112、第一凸筋2113和第二凸筋2114均位于第三凸筋2115的内环空间内。
请一并参阅图13至图15，第三凸筋2115的背离泄压机构2112的一侧与盖体2111的侧壁共同构成端盖组件211的外周壁，端盖组件211的外周壁与电池单体21的壳体212的内周壁正对设置，并且端盖组件211的外周壁与电池单体21的壳体212的内周壁相焊接。
通过采用上述技术方案，使得端盖组件211的外周壁与电池单体21的壳体212的内周壁之间的焊痕大小变得更加均匀，从而使得端盖组件211的外周壁受力变得更加均匀，进一步增加了端盖组件211与电池单体21的壳体212之间的焊接强度，同时进一步增加了盖体2111的整体结构强度，进一步减少了在电池单体21的内部压力较高时盖体2111的变形幅度，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请一并参阅图8至图11，第二凸筋2114连接于第一凸筋2113和第三凸筋2115之间。
换言之，第二凸筋2114起始于第一凸筋2113朝第三凸筋2115延伸并终止于第三凸筋2115。
通过采用上述技术方案，进一步增加了盖体2111的整体结构强度，进一步减少了在电池单体21的内部压力较高时盖体2111的变形幅度，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请参阅图12，端盖组件211还包括设置于盖体2111上的第四凸筋2116，第四凸筋2116环设于泄压机构2112且位于第一凸筋2113和第三凸筋2115之间。
第四凸筋2116环设于泄压机构2112是指第四凸筋2116沿泄压机构2112的外周部位延伸并且闭合形成环状结构。环状结构可以是闭环结构，也可以是开环结构，即第四凸筋2116包括至少两个筋段，各个筋段相互分隔设置。为了便于描述，可以将该环状结构的内侧空间称为第四凸筋2116的内环空间，将该环状结构的外侧空间称为第四凸筋2116的外环空间。
第四凸筋2116位于第一凸筋2113和第三凸筋2115之间是指第四凸筋2116位于第三凸筋2115的内环空间内，第一凸筋2113位于第四凸筋2116的内环空间内。
当第二凸筋2114连接于第一凸筋2113和第三凸筋2115之间时，第四凸筋2116与第二凸筋2114相连接，换言之，第二凸筋2114自第一凸筋2113穿过第四凸筋2116后连接于第三凸筋2115。
通过采用上述技术方案，进一步增加了盖体2111的整体结构强度，进一步减少了在电池单体21的内部压力较高时盖体2111的变形幅度，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，第四凸筋2116的数量为多个。
多个第四凸筋2116相互嵌套设置，即一个第四凸筋2116位于另一个第四凸筋2116的内环空间内，如此类推。第四凸筋2116的数量可以根据电池单体21的设计需求而定，例如两个、三个等，在此不做具体限定。
通过采用上述技术方案，进一步增加了盖体2111的整体结构强度，进一步减少了在电池单体21的内部压力较高时盖体2111的变形幅度，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在本申请的一些实施例中，请参阅图7，第三凸筋2115相对盖体2111表面的凸出高度h1为0.2mm-3mm。
第三凸筋2115的凸出高度h1是指第三凸筋2115沿盖体2111的厚度方向（即图7所示的Z方向）的尺寸，第三凸筋2115的凸出高度h1可以根据电池单体21的设计需求而定，具体地可为0.2mm、1.5mm、3mm等，在此不作具体限定。
由于第三凸筋2115的作用是增加端盖组件211与壳体212之间的焊接面积，如果第三凸筋2115的凸出高度h1过小，则端盖组件211与壳体212之间的焊接面积的增加幅度较小，对端盖组件211和壳体212之间的焊接强度提升作用不明显，如果第三凸筋2115的凸出高度h1过大，会导致第三凸筋2115与电池单体21内部的集流构件214、电极组件213等部件产生干涉。通过将第三凸筋2115的凸出高度h1限定在上述范围内，既可保证第三凸筋2115能够有效增加端盖组件211与壳体212之间的焊接面积，从而提升端盖组件211和壳体212之间的焊接强度，也可防止第三凸筋2115因凸出高度h1过大而与其它部件产生干涉。
在本申请的一些实施例中，请参阅图7，第三凸筋2115的宽度W1为0.3mm-8mm。
第三凸筋2115的宽度W1是指第三凸筋2115沿垂直于第三凸筋2115的延伸方向且垂直于盖体2111的厚度方向（即图7所示的Z方向）的方向的尺寸，第三凸筋2115的宽度W1可以根据电池单体21的设计需求而定，具体地可为0.3mm、4mm、8mm等，在此不作具体限定。
由于第三凸筋2115需要与壳体212进行焊接，如果第三凸筋2115的宽度W1过小，第三凸筋2115会被高温熔化，导致第三凸筋2115失效，如果第三凸筋2115的宽度W1过大，会导致第三凸筋2115与端盖组件211中的绝缘件等部件产生干涉。通过将第三凸筋2115的宽度W1限定在上述范围内，既可保证第三凸筋2115能够有效增加端盖组件211与壳体212之间的焊接强度，也可防止第三凸筋2115因宽度W1过大而与其它部件产生干涉。
在本申请的一些实施例中，请参阅图7，盖体2111具有相背离设置的第一表面21111和第二表面21112，通孔部21121贯穿第一表面21111和第二表面21112，第一凸筋2113和第二凸筋2114均设置于第一表面21111，端盖组件211还包括设置于第二表面21112上的第五凸筋2117，第五凸筋2117环设于泄压机构2112。
第一表面21111和第二表面21112是盖体2111沿其厚度方向（即图7所示的Z方向）的两个表面，其中，第一表面21111可以是盖体2111朝向电池单体21的内部环境的表面，也可以是盖体2111背向电池单体21的内部环境的表面，在本实施例中，第一表面21111是盖体2111朝向电池单体21的内部环境的表面，第二表面21112是盖体2111背向电池单体21的内部环境的表面。第一凸筋2113和第二凸筋2114均在第一表面21111上凸出设置，第五凸筋2117在第二表面21112上凸出设置。当盖体2111还包括第三凸筋2115和第四凸筋2116时，第三凸筋2115和第四凸筋2116均在第一表面21111上凸出设置。
第五凸筋2117环设于泄压机构2112是指第五凸筋2117沿泄压机构2112的外周部位延伸并且闭合形成环状结构。环状结构可以是闭环结构，也可以是开环结构，即第五凸筋2117包括至少两个筋段，各个筋段相互分隔设置。为了便于描述，可以将该环状结构的内侧空间称为第五凸筋2117的内环空间，将该环状结构的外侧空间称为第五凸筋2117的外环空间。通孔部21121位于第五凸筋2117的内环空间内。
通过采用上述技术方案，进一步增加了盖体2111位于泄压机构2112的外周侧的部位的强度，使得泄压机构2112能够更加迅速的打开以将积聚在电池单体21内部的气体向外排出，从而进一步降低了盖体2111与电池单体21的壳体212相互分离的风险，进一步提高了电池单体21的使用安全性。
在其它实施例中，为了进一步提高盖体2111的结构强度，端盖组件211还可以包括第六凸筋（图中未示），第六凸筋设置于第二表面21112上且位于第五凸筋2117的背离泄压机构2112的一侧，第六凸筋可以环设于第五凸筋2117，也可以沿自第五凸筋2117朝盖体2111的边缘的方向延伸。
在本申请的一些实施例中，请参阅图7，第一凸筋2113的凸出高度h2为0.2mm-6mm。
第一凸筋2113的凸出高度h2是指第一凸筋2113沿盖体2111的厚度方向（即图7所示的Z方向）的尺寸，第一凸筋2113的凸出高度可以根据电池单体21的设计需求而定，具体地可为0.2mm、3mm、6mm等，在此不作具体限定。
由于第一凸筋2113的作用是增加盖体2111位于泄压机构2112的外周侧的部位的强度，如果第一凸筋2113的凸出高度h2过小，则第一凸筋2113对盖体2111位于泄压机构2112的外周侧的部位的加强作用不明显，如果第一凸筋2113的凸出高度h2过大，会导致第一凸筋2113与端盖组件211中的绝缘件等部件产生干涉。通过将第一凸筋2113的凸出高度h2限定在上述范围内，既可保证第一凸筋2113能够对盖体2111位于泄压机构2112的外周侧的部位产生足够的加强作用，也可防止第一凸筋2113因凸出高度h2过大而与其它部件产生干涉。
在本申请的一些实施例中，请参阅图7，第一凸筋2113的宽度W2为0.5mm-10mm。
第一凸筋2113的宽度W2是指第一凸筋2113沿垂直于第一凸筋2113的延伸方向且垂直于盖体2111的厚度方向（即图7所示的Z方向）的方向的尺寸，第一凸筋2113的宽度可以根据电池单体21的设计需求而定，具体地可为0.5mm、5mm、10mm等，在此不作具体限定。
由于第一凸筋2113的作用是增加盖体2111位于泄压机构2112的外周侧的部位的强度，如果第一凸筋2113的宽度W2过小，则第一凸筋2113对盖体2111位于泄压机构2112的外周侧的部位的加强作用不明显，如果第一凸筋2113的宽度W2过大，会导致第一凸筋2113与端盖组件211中的绝缘件等部件产生干涉。通过将第一凸筋2113的宽度W2限定在上述范围内，既可保证第一凸筋2113能够对盖体2111位于泄压机构2112的外周侧的部位产生足够的加强作用，也可防止第一凸筋2113因宽度W2过大而与其它部件产生干涉。
请一并参阅图4、图5以及图13至图15，本申请实施例还提供了一种电池单体21，包括壳体212和上述任一个实施例的端盖组件211，盖体2111盖设于壳体212。
本申请实施例提供的电池单体21由于采用了上述任一个实施例的端盖组件211，从而有效提高了该电池单体21的使用安全性。
请一并参阅图2及图3，本申请实施例还提供一种电池100，包括上述电池单体21。
本申请实施例提供的电池100由于采用了上述电池单体21，从而有效提高了该电池100的使用安全性。
请参阅图1，本申请实施例还提供一种用电装置，包括上述电池100。
本申请实施例提供的用电装置由于采用了上述电池100，从而有效提高了该用电装置的使用安全性。
以上仅为本申请的可选实施例而已，并不用于限制本申请。对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。
Claims (20)
- 端盖组件，其特征在于，所述端盖组件包括：盖体，设有泄压机构；第一凸筋，设置于所述盖体上，且环设于所述泄压机构；以及第二凸筋，设置于所述盖体上，且设于所述第一凸筋的背离所述泄压机构的一侧。
- 根据权利要求1所述的端盖组件，其特征在于，所述第二凸筋的数量为多个，所述第一凸筋的相对两侧均设有所述第二凸筋。
- 根据权利要求2所述的端盖组件，其特征在于，所述第一凸筋与多个所述第二凸筋分布形成对称结构。
- 根据权利要求1所述的端盖组件，其特征在于，所述第二凸筋的数量为多个，多个所述第二凸筋围绕所述第一凸筋分布。
- 根据权利要求4所述的端盖组件，其特征在于，所述第一凸筋与多个所述第二凸筋分布形成对称结构。
- 根据权利要求1-5任一项所述的端盖组件，其特征在于，所述第二凸筋沿自所述第一凸筋朝所述盖体的边缘的方向延伸。
- 根据权利要求6所述的端盖组件，其特征在于，所述第二凸筋的一端与所述第一凸筋相连接，所述第二凸筋的另一端延伸至所述盖体的边缘上。
- 根据权利要求1-5任一项所述的端盖组件，其特征在于，所述端盖组件还包括设置于所述盖体的边缘上的第三凸筋，所述第三凸筋的背离所述泄压机构的一侧与所述盖体的侧壁相齐平。
- 根据权利要求8所述的端盖组件，其特征在于，所述第三凸筋环设于所述泄压机构。
- 根据权利要求9所述的端盖组件，其特征在于，所述第二凸筋连接于所述第一凸筋和所述第三凸筋之间。
- 根据权利要求9所述的端盖组件，其特征在于，所述端盖组件还包括设置于所述盖体上的第四凸筋，所述第四凸筋环设于所述泄压机构且位于所述第一凸筋和所述第三凸筋之间。
- 根据权利要求11所述的端盖组件，其特征在于，所述第四凸筋的数量为多个。
- 根据权利要求8所述的端盖组件，其特征在于，所述第三凸筋相对所述盖体表面的凸出高度为0.2mm-3mm。
- 根据权利要求8所述的端盖组件，其特征在于，所述第三凸筋的宽度为0.3mm-8mm。
- 根据权利要求1-5任一项所述的端盖组件，其特征在于，所述盖体具有相背离设置的第一表面和第二表面，所述第一凸筋和所述第二凸筋均设置于所述第一表面，所述盖体还包括设置于所述第二表面上的第五凸筋，所述第五凸筋环设于所述泄压机构。
- 根据权利要求1-5任一项所述的端盖组件，其特征在于，所述第一凸筋相对所述盖体表面的凸出高度为0.2mm-6mm。
- 根据权利要求1-5任一项所述的端盖组件，其特征在于，所述第一凸筋的宽度为0.5mm-10mm。
- 电池单体，其特征在于，所述电池单体包括壳体和如权利要求1-17任一项所述的端盖组件，所述盖体盖设于所述壳体。
- 电池，其特征在于，所述电池包括如权利要求18所述的电池单体。
- 用电装置，其特征在于，所述用电装置包括如权利要求19所述的电池。
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