WO2023160389A1 - 电池壳体、电池单体、电池和用电设备 - Google Patents

电池壳体、电池单体、电池和用电设备 Download PDF

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Publication number
WO2023160389A1
WO2023160389A1 PCT/CN2023/074956 CN2023074956W WO2023160389A1 WO 2023160389 A1 WO2023160389 A1 WO 2023160389A1 CN 2023074956 W CN2023074956 W CN 2023074956W WO 2023160389 A1 WO2023160389 A1 WO 2023160389A1
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WO
WIPO (PCT)
Prior art keywords
battery
explosion
proof valve
area
protrusion
Prior art date
Application number
PCT/CN2023/074956
Other languages
English (en)
French (fr)
Inventor
陈小波
金秋
顾明光
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2023160389A1 publication Critical patent/WO2023160389A1/zh

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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 technical field of batteries, and more specifically, relates to a battery case, a battery cell, a battery and electrical equipment.
  • the secondary battery can be charged and discharged. If the secondary battery is under the following conditions, such as overcharging, being pierced by a metal conductor, and a hot box test, the interior of the secondary battery will quickly accumulate heat and gas. As a result, the internal pressure of the secondary battery increases, and in severe cases, it causes expansion and explosion of the secondary battery.
  • Secondary batteries are used in passenger cars, and their safety performance is related to the lives of passengers. Therefore, how to enhance the safety performance of secondary batteries has become an urgent problem to be solved.
  • One of the purposes of the embodiments of the present application is to provide a battery casing, a battery cell, a battery and an electrical device, so as to solve the technical problem of poor safety performance of the battery in the related art.
  • the present application provides a battery case for a battery cell, including: a casing and an explosion-proof valve, the bottom of the casing has a raised corresponding area and a non-raised corresponding area, and the raised corresponding area is connected to the bottom plate of the battery
  • the protrusions of the battery are arranged oppositely, and the corresponding areas of the non-protrusions are set in a staggered manner with the protrusions of the bottom plate of the battery, preventing The explosion valve is set in the non-raised corresponding area.
  • the beneficial effect of the battery case provided by the embodiment of the present application is that: the battery case provided by the embodiment of the present application provides a raised corresponding area opposite to the protrusion of the bottom plate of the battery and a protrusion corresponding to the protrusion of the bottom plate of the battery at the bottom of the casing.
  • the non-protruding corresponding areas are staggered, and the explosion-proof valve is arranged in the non-protruding corresponding area. Since the non-protruding corresponding areas and the bulges of the battery bottom plate are staggered, that is, the explosion-proof valve is not the same as the bulge of the battery bottom plate.
  • the protrusion of the bottom plate of the battery will not block the explosion-proof valve, so the protrusion of the bottom plate of the battery will not affect the normal exhaust of the explosion-proof valve.
  • the thermal runaway of the battery cell occurs and the internal pressure of the battery cell exceeds the specified value, since the explosion-proof valve is set in the non-protruded corresponding area, the protrusion of the bottom plate of the battery will not affect the exhaust of the explosion-proof valve, thereby avoiding the explosion-proof valve.
  • the problem of poor gas flow allows the gas in the battery to be discharged, thereby avoiding battery bursting, reducing potential safety hazards, and improving safety.
  • the raised corresponding area is disposed in the middle area of the bottom of the housing, and both sides of the raised corresponding area are non-raised corresponding areas.
  • the middle area of the bottom plate of the battery is provided with a protrusion
  • the middle area of the housing is also a corresponding area of the protrusion, so that the area corresponding to the protrusion of the housing corresponds to the protrusion of the bottom plate of the battery
  • the other areas in the bottom of the shell except the corresponding areas of the protrusions are non-corresponding areas, that is, the areas on both sides of the corresponding areas of the protrusions are non-area corresponding areas, and the explosion-proof valve can be set in any one or two non-area corresponding areas.
  • the explosion-proof valve is offset relative to the protrusion, so that when the thermal runaway of the battery cell occurs, the problem of poor exhaust caused by the protrusion blocking the explosion-proof valve is avoided, so as to achieve smooth exhaust and avoid the battery cell Explosion due to poor exhaust during thermal runaway reduces potential safety hazards.
  • the housing is provided with an explosion-proof valve in at least one non-protruding corresponding area.
  • the explosion-proof valve can be arranged in at least one non-protruding corresponding area, so that when the thermal runaway of the battery cell occurs, the explosion-proof valve located in at least one non-protruding corresponding area can be exhausted smoothly, thereby performing exhaust. , Avoid danger, and further improve safety.
  • the housing is provided with explosion-proof valves in the two non-protruding corresponding areas.
  • explosion-proof valves are provided in the two non-protruding corresponding areas, that is, the number of explosion-proof valves is at least two, so that when the thermal runaway of the battery core occurs, it can be exhausted at at least two explosion-proof valves.
  • Gas which improves the exhaust effect and speed, and further improves the safety, and is equipped with explosion-proof valves in the corresponding areas of the two non-protrusions. Exhaust, the gas can be discharged from the nearest explosion-proof valve, which improves the speed and effect of exhaust and further reduces the risk.
  • the shell is provided with a plurality of explosion-proof valves in the non-protruding corresponding area.
  • a plurality of explosion-proof valves can be respectively arranged in each non-area corresponding area, thereby improving exhaust effect and efficiency, and further improving safety.
  • the anti-explosion valves disposed in two non-protruding corresponding areas are symmetrically disposed.
  • the two explosion-proof valves arranged symmetrically can avoid the problem of poor exhaust caused by the offset of the explosion-proof valve, improve the exhaust effect and efficiency, and further avoid the probability of explosion caused by thermal runaway of the battery cell , which improves the safety, and the two explosion-proof valves arranged symmetrically make the appearance of the battery case more beautiful and tidy.
  • the explosion-proof valve is a scored explosion-proof valve or a welded explosion-proof valve.
  • the notched explosion-proof valve refers to the formation of an explosion-proof valve in the form of notches on the shell, so that the position of the shell with the notch is weaker than other positions of the shell, so that when the thermal runaway of the battery cell occurs, the thermal runaway The generated gas can break through the scored explosion-proof valve to exhaust when the pressure reaches a certain value, thereby avoiding safety problems caused by thermal runaway.
  • the welding explosion-proof valve refers to the explosion-proof valve formed on the shell by welding. The welding position of the shell is weaker than other positions of the shell, so that when the thermal runaway of the battery occurs, the gas generated by the thermal runaway will be released when the pressure reaches a certain value.
  • the explosion-proof valve can be punched and welded for exhaust, thereby avoiding safety problems caused by thermal runaway.
  • the present application provides a battery cell, which includes the battery case and the battery cell in the above embodiment, and the battery cell is arranged in the shell of the battery case.
  • the beneficial effect of the battery cell provided in the embodiment of the present application is that: the battery cell provided in the embodiment of the present application uses the battery case in the above embodiment, which effectively improves the safety performance of the battery cell.
  • the present application provides a battery, which includes a bottom plate and the battery cells in the above-mentioned embodiments.
  • the protrusion is arranged opposite to the raised corresponding area of the battery case of the battery cell.
  • the beneficial effect of the battery provided by the embodiment of the present application is that: the battery provided by the embodiment of the present application effectively improves the safety performance of the battery due to the use of the battery cell in the above embodiment.
  • the present application provides an electric device, which includes the battery in the above embodiment, and the battery is used to provide electric energy.
  • 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 effectively improves the safety performance of the electric device by using the battery in the above embodiment.
  • Fig. 1 is a structural schematic diagram of an inverted battery case with a welded explosion-proof valve provided in some embodiments of the present application;
  • Fig. 2 is a structural schematic diagram of an inverted battery case with a scored explosion-proof valve provided in some embodiments of the present application;
  • Fig. 3 is a schematic diagram of an explosion structure of a battery provided by some embodiments of the present application.
  • Fig. 4 is a second schematic diagram of the explosive structure of the battery provided by some embodiments of the present application.
  • Fig. 5 is a top view of a battery provided by some embodiments of the present application.
  • Fig. 6 is a cross-sectional view of the battery shown in Fig. 5 along the line A-A.
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • the position of the protrusion corresponds to the position of the explosion-proof valve, that is, the protrusion will block the explosion-proof valve, so that the explosion-proof valve cannot be exhausted, which will cause the battery cell to be damaged.
  • the thermal runaway occurs due to poor exhaust, it will cause an explosion, which has potential safety hazards.
  • the inventors have found that the explosion-proof valve and the protrusion of the battery bottom plate can be staggered to prevent the explosion-proof valve from being blocked by the protrusion of the battery bottom plate. Shielding, so that when the thermal runaway of the battery core occurs, the battery core explosion caused by the explosion-proof valve is avoided due to poor exhaust.
  • the inventor in order to solve the problem of explosion caused by poor exhaust gas when the battery cell has thermal runaway, the inventor has conducted in-depth research and designed a battery case.
  • the bottom of the battery case is It is divided into the area corresponding to the raised area and the area corresponding to the non-raised area.
  • the area corresponding to the raised area corresponds to the raised area of the bottom plate of the battery.
  • the explosion-proof valve can not be blocked by the protrusion of the bottom plate of the battery, avoiding the problem of poor exhaust caused by the blocking of the explosion-proof valve, and avoiding the explosion of the battery cell.
  • the battery cells disclosed in the embodiments of the present application can be used, but not limited, in electrical equipment such as vehicles, ships, or aircrafts.
  • the power supply system of the electrical equipment composed of the battery casing, battery cells, and batteries disclosed in the present application can be used. In this way, when the thermal runaway of the battery core occurs, the gas breaks through the explosion-proof valve to exhaust, avoiding an explosion. Improved security.
  • the embodiment of the present application provides an electric device using a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • FIG. 1 is a schematic structural diagram of a battery case 1 provided by some embodiments of the present application.
  • FIG. 2 is a schematic structural diagram of a battery case 1 provided by other embodiments of the present application.
  • the battery case 1 includes a housing 11 and an explosion-proof valve 12.
  • the housing 11 has a space for accommodating the battery cell 2.
  • the bottom of the housing 11 is divided into a raised corresponding area 111 and a non-raised corresponding area 112.
  • the explosion-proof valve 12 is set in the non-area corresponding area.
  • FIG. 3 and FIG. 4 are schematic structural diagrams of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a plurality of battery cells 3 , and the battery cell 3 refers to the smallest unit constituting the battery 100 .
  • the battery cell 3 includes an end cap, a battery case 1 , a battery cell 2 and other functional components.
  • the end cap refers to a component that covers the opening of the battery case 1 to isolate the internal environment of the battery cell 3 from the external environment.
  • the shape of the end cap can be adapted to the shape of the battery case 1 to match the battery case 1 .
  • the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easy to deform when being squeezed and collided, so that the battery cell 3 can have higher structural strength , safety performance can also be improved.
  • the battery case 1 is a component used to cooperate with the end cap to form the internal environment of the battery cell 3 , wherein the formed internal environment can be used to accommodate the battery cell 2 , electrolyte and other components.
  • the battery case 1 and the end cover can be independent components, and an opening can be provided on the battery case 1 , and the internal environment of the battery cell 3 can be formed by making the end cover cover the opening at the opening. Without limitation, the end cover and the battery case 1 may also be integrated.
  • the battery case 1 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the battery case 1 can be determined according to the specific shape and size of the battery cell 2 .
  • the battery case 1 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in this embodiment of the present application.
  • the battery case 1 includes a casing 11 and an explosion-proof valve 12.
  • the casing 11 accommodates the battery cell 2.
  • the bottom of the casing 11 is arranged below the battery cell 2.
  • the bottom of the casing 11 has a raised corresponding area 111 and a non-raised corresponding area 112.
  • the protrusion corresponding area 111 corresponds to the protrusion 41 of the bottom plate 4 of the battery 100
  • the non-protrusion corresponding area 112 does not correspond to the protrusion 41 of the bottom plate 4 of the battery 100
  • the explosion-proof valve 12 is arranged on the bottom of the casing 11 corresponding to the non-protrusion In the area 112, when the thermal runaway of the battery cell 2 occurs and the internal pressure of the battery cell 2 reaches a certain value, the explosion-proof valve 12 is broken open, and since the explosion-proof valve 12 will not be blocked by the protrusion 41 of the bottom plate 4 of the battery 100, the gas It can be discharged smoothly to prevent the cell 2 from exploding.
  • the battery cell 2 is a part where the electrochemical reaction occurs in the battery cell 3 .
  • the battery cell 2 is also called an electrode assembly, and is mainly formed by winding or stacking positive and negative electrodes, and a separator is usually provided between the positive and negative electrodes.
  • the part of the positive electrode sheet and the negative electrode sheet with the active material constitutes the main body of the cell 2 , and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute tabs.
  • the positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively.
  • the battery 100 includes a base plate 4 and a plurality of sequentially arranged battery cells 3 , the bottom of the plurality of sequentially arranged battery cells 3 is provided with a base plate 4 , and a protrusion 41 is provided on the base plate 4 .
  • the area of the bottom of the shell 11 of the battery cell 3 corresponding to the protrusion 41 is the area corresponding to the protrusion 111
  • the area of the bottom of the shell 11 of the battery cell 3 not corresponding to the protrusion 41 is the area 112 corresponding to the non-protrusion.
  • the battery 100 there may be multiple battery cells 3 , and the multiple battery cells 3 may be connected in series, parallel or mixed.
  • the mixed connection means that the multiple battery cells 3 are both connected in series and in parallel.
  • a plurality of battery cells 3 can be directly connected in series or in parallel or mixed together; of course, the battery 100 can also be in the form of a battery module in which a plurality of battery cells 3 are first connected in series or in parallel or in combination, and then a plurality of battery modules are connected in series Or parallel or mixed to form a whole.
  • the battery 100 may also include other structures, for example, the battery 100 may also include a current flow component for realizing electrical connection between multiple battery cells 3 .
  • each battery cell 3 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
  • the battery cell 3 can be in the form of a cylinder, a flat body, a cuboid or other shapes.
  • the present application provides a battery casing 1, including a casing 11 and an explosion-proof valve 12.
  • the bottom of the casing 11 has a raised corresponding area 111 and a non-raised corresponding area 111.
  • Area 112 the area 111 corresponding to the protrusion is set opposite to the protrusion 41 of the bottom plate 4 of the battery 100,
  • the non-protrusion corresponding area 112 is set alternately with the protrusion 41 of the bottom plate 4 of the battery 100
  • the explosion-proof valve 12 is disposed in the non-protrusion corresponding area 112 .
  • the casing 11 is a container housing the battery cell 2, including a bottom and a side part, the bottom part is arranged below the battery cell 2, and the side part is a structure enclosed by the side wall of the battery cell 2.
  • the bottom plate 4 of the battery 100 is provided with a protrusion 41 on the bottom plate 4 of the battery 100. There is a part of the area at the bottom of the casing 11 corresponding to the protrusion 41 at the bottom of the battery 100, and this area is the corresponding area 111 for the protrusion.
  • the area of the bottom that does not correspond to the protrusion 41 is a non-protrusion corresponding area 112, and the explosion-proof valve 12 is arranged in the non-protrusion corresponding area 112 of the bottom of the shell 11, and the explosion-proof valve 12 is a thin-walled valve body on the shell 11,
  • the explosion-proof valve 12 can be broken through first when the casing 11 is subjected to a pressure shock, so as to achieve the purpose of discharging gas.
  • An explosion-proof valve 12 is provided on the non-protruding corresponding area 112 at the bottom of the shell 11.
  • the explosion-proof valve 12 is opened, and the gas will flow from the explosion-proof valve 12.
  • the protrusion 41 of the bottom plate 4 of the battery 100 will not block the explosion-proof valve 12, thereby avoiding the problem of poor exhaust of the explosion-proof valve 12, so that the battery cell 3
  • the gas in the battery can be discharged smoothly, thereby avoiding the explosion of the battery cell 2, reducing potential safety hazards and improving safety.
  • the raised corresponding area 111 is disposed in the middle area of the bottom of the housing 11 , and both sides of the raised corresponding area 111 are non-raised corresponding areas 112 .
  • the protrusion 41 on the base plate 4 of the battery 100 is arranged on the central area of the base plate 4, so that the corresponding area 111 corresponding to the protrusion at the bottom of the shell 11 is also arranged at the central area of the bottom of the shell 11, and is located at the bottom of the shell 11.
  • the two sides of the raised corresponding area 111 in the central area are the non-raised corresponding areas 112, of course, when the raised 41 of the bottom of the battery 100 is arranged on the side or other areas, the corresponding bottom of the shell 11
  • the position of the corresponding region 111 of the protrusion will also change accordingly.
  • the outer Other areas of the bottom of the shell 11 except the area corresponding to the protrusion 111 will also change accordingly.
  • the middle area of the bottom of the housing 11 is a raised corresponding area 111, and the two sides of the raised corresponding area 111 located in the middle area are non-raised corresponding areas 112, and the explosion-proof valve 12 can be arranged on any of the two sides of the raised corresponding area 111.
  • One or two non-areas correspond to the area, so as to realize the offset of the explosion-proof valve 12 relative to the protrusion 41, so as to avoid the poor exhaust caused by the protrusion 41 blocking the explosion-proof valve 12 when the battery 2 has thermal runaway In order to achieve unobstructed exhaust, avoid the explosion caused by poor exhaust when the battery cell 2 is thermally out of control, and reduce potential safety hazards.
  • the housing 11 is provided with an explosion-proof valve 12 in at least one non-protruding corresponding area 112 .
  • the raised corresponding area 111 is arranged in the middle area of the bottom of the housing 11, so that both sides of the raised corresponding area 111 are non-raised corresponding areas 112, in order to prevent the explosion-proof valve 12 from being blocked by the protrusion 41 of the bottom plate 4 of the battery 100,
  • the explosion-proof valve 12 can be arranged in the non-protruding corresponding area 112 , and the explosion-proof valve 12 can be arranged in at least one non-protruding corresponding area 112 .
  • the explosion-proof valve 12 can be arranged in at least one non-protruding corresponding area 112, so that when the thermal runaway of the electric core 2 occurs, the explosion-proof valve 12 located in at least one non-protruding corresponding area 112 can not be
  • the protrusion 41 blocks, so that the gas can be discharged smoothly, and the phenomenon of poor exhaust will not occur, avoiding explosions caused by poor exhaust, reducing the risk, and further improving safety.
  • the housing 11 is provided with explosion-proof valves 12 in the two non-protruding corresponding regions 112 .
  • Explosion-proof valves 12 are provided in the two non-protruding corresponding regions 112 , that is, the number of explosion-proof valves 12 is at least two, and each explosion-proof valve 12 is arranged at intervals.
  • Explosion-proof valves 12 are provided in the two non-protruding corresponding regions 112, and each non-protruding pair At least one explosion-proof valve 12 is provided in the response area 112, that is, the number of explosion-proof valves 12 is at least two, so that when the thermal runaway of the battery cell 2 occurs, exhaust can be performed at at least two explosion-proof valves 12, which improves the exhaust gas efficiency.
  • the effect and speed further improve the safety, and the explosion-proof valves 12 are respectively provided in the two non-protruding corresponding areas 112, and when the thermal runaway of the battery cell 2 occurs, the exhaust can be performed at different positions of the battery case 1 , the gas can be discharged from the nearest explosion-proof valve 12, which improves the speed and effect of exhaust and further reduces the danger.
  • the shell 11 is provided with a plurality of explosion-proof valves 12 in the non-protruding corresponding area 112 .
  • a plurality of anti-explosion valves 12 can be respectively arranged in each non-protruding corresponding area 112 , so that the exhaust effect and efficiency can be improved, and the safety can be further improved.
  • the explosion-proof valves 12 disposed in the two non-protruding corresponding regions 112 are symmetrically disposed.
  • the explosion-proof valves 12 disposed in the two non-protruding corresponding regions 112 are arranged symmetrically, that is, the explosion-proof valves 12 disposed in the two non-protruding corresponding regions 112 are arranged symmetrically with respect to the raised corresponding region 111 .
  • the explosion-proof valve 12 Since the protrusion 41 of the bottom plate 4 of the battery 100 corresponds to the middle area of the bottom of the housing 11, the explosion-proof valve 12 is arranged in the non-middle area of the bottom of the housing 11, and the explosion-proof valve 12 is biased relative to the protrusion 41 at this time,
  • the explosion-proof valves 12 in the two non-protruding corresponding areas 112 are arranged symmetrically, which can make the exhaust unimpeded, thereby avoiding the problem of poor exhaust caused by the offset of the explosion-proof valves 12, improving the exhaust effect and efficiency, and further The probability of explosion caused by the thermal runaway of the battery cell 2 is avoided, and the safety is improved, and the two explosion-proof valves 12 arranged symmetrically make the appearance of the battery case 1 more beautiful and tidy.
  • the explosion-proof valve 12 is a scored explosion-proof valve or a welded explosion-proof valve.
  • the notch explosion-proof valve refers to the explosion-proof valve 12 formed by scoring on the casing 11, and the casing 11 has a notch
  • the position of the mark is weaker than other positions of the shell 11, so it is easier to be broken open under the impact of gas pressure
  • the welding explosion-proof valve refers to the explosion-proof valve 12 formed on the shell 11 by welding, and the welding position of the shell 11 is relatively Other positions of the casing 11 are weaker, so they are more likely to be broken open under the impact of gas pressure.
  • the explosion-proof valve 12 can be set as a scored explosion-proof valve, or a welded explosion-proof valve. When the thermal runaway of the battery cell 2 occurs, the gas generated by the thermal runaway can break through the scored explosion-proof valve or the welded explosion-proof valve and be discharged to the outside, thereby avoiding Safety concerns due to thermal runaway.
  • the embodiment of the present application also provides a battery cell 3, please refer to FIG. 3 to FIG. Inside the shell 11 of the battery case 1 .
  • the battery cell 3 provided in the embodiment of the present application uses the battery case 1 in the above embodiment, which effectively improves the safety performance of the battery cell 3 .
  • the embodiment of the present application also provides a battery 100, including the battery cells 3 and the bottom plate 4 of any of the above schemes, a plurality of battery cells 3 are arranged in sequence, and the bottom plate 4 is fixedly arranged on the The bottom of the body 3 , and the protrusion 41 on the bottom plate 4 is opposite to the corresponding area 111 of the protrusion of the battery case 1 of the battery cell 3 .
  • the battery 100 provided in the embodiment of the present application uses the battery cell 3 in the above embodiment, which effectively improves the safety performance of the battery 100 .
  • the embodiment of the present application also provides an electric device, including the battery 100 of any solution above, and the battery 100 is used to provide electric energy for the electric device.
  • the powered device may be any of the aforementioned devices or systems using the battery 100 .
  • the present application provides a battery case 1, the battery case 1 includes a case 11 and an explosion-proof valve 12, the case 11 is provided with a cell 2 inside, and the case The middle area of the bottom of 11 is provided with a raised corresponding area 111 opposite to the raised 41 of the bottom plate 4 of the battery 100, and two non-raised corresponding areas 112 are located on both sides of the raised corresponding area 111 at the bottom of the casing 11.
  • Explosion-proof valves 12 are arranged in the two non-protruding corresponding regions 112, and the explosion-proof valves 12 located in the two non-protruding corresponding regions 112 are arranged symmetrically, so that the protrusion 41 of the bottom plate 4 of the battery 100 will not block the explosion-proof valve 12 , the protrusion 41 of the bottom plate 4 of the battery 100 will not adversely affect the normal exhaust of the explosion-proof valve 12.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请公开一种电池壳体(1)、电池单体(3)、电池(100)和用电设备。电池壳体(1)包括外壳(11)，外壳(11)的底部具有凸起对应区域(111)，凸起对应区域(111)用于与电池(100)的底板(4)的凸起(41)相对；防爆阀(12)，防爆阀(12)设置在外壳(11)的底部的非凸起对应区域(112)。

Description

电池壳体、电池单体、电池和用电设备
交叉引用
本申请要求于2022年02月22日在中国专利局提交的、申请号为202220361886.2、发明名称为“电池壳体、电池单体、电池和用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，更具体地说，是涉及一种电池壳体、电池单体、电池和用电设备。
背景技术
二次电池是可以充电和放电的，如果二次电池处在如下情况，例如过度充电、被金属导体刺穿极片以及热箱测试时，则二次电池的内部会快速的积聚热量和气体，由此造成二次电池的内部压力增加，严重时导致二次电池的膨胀和爆炸。
二次电池要使用在乘用车上，它的安全性能关乎着乘客的生命安全，所以，如何增强二次电池的安全性能成为一项亟待解决的问题。
发明内容
本申请实施例的目的之一在于：提供一种电池壳体、电池单体、电池和用电设备，以解决相关技术中的电池的安全性能差的技术问题。
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，本申请提供了一种用于电池单体的电池壳体，包括：外壳和防爆阀，外壳的底部具有凸起对应区域和非凸起对应区域，凸起对应区域与电池的底板的凸起相对设置，非凸起对应区域与电池的底板的凸起相错设置，防 爆阀设置在非凸起对应区域。
本申请实施例提供的电池壳体的有益效果在于：本申请实施例提供的电池壳体通过在外壳的底部设置与电池的底板的凸起相对的凸起对应区域以及与电池的底板的凸起相错设置的非凸起对应区域，并且将防爆阀设置在非凸起对应区域，由于非凸起对应区域与电池的底板的凸起相错设置，即防爆阀与电池的底板的凸起不相对应，亦即电池的底板的凸起不会遮挡防爆阀，从而电池的底板的凸起不影响防爆阀的正常排气。当电芯发生热失控且电芯的内部压力超过规定值时，由于防爆阀设置在非凸起对应区域，从而电池的底板的凸起不会影响防爆阀的排气，从而避免造成防爆阀排气不畅的问题，使得电池中的气体能够排出，从而避免电池爆裂，减少了安全隐患，提高了安全性。
在一些实施例中，凸起对应区域设置于外壳的底部的中间区域，凸起对应区域的两侧均为非凸起对应区域。
通过采用上述技术方案，由于电池的底板的中间区域设置有凸起，相对应地，外壳的中间区域也为凸起对应区域，从而外壳的凸起对应区域与电池的底板的凸起相对应，而外壳的底部中除凸起对应区域外的其它区域为非凸起对应区域，即凸起对应区域的两侧区域为非区域对应区域，可以将防爆阀设置在任意一个或两个非区域对应区域内，从而实现防爆阀相对于凸起的偏置，以在电芯发生热失控时，避免因凸起遮挡防爆阀而造成排气不畅的问题，从而实现排气通畅，避免了电芯热失控时因排气不畅而发生的爆炸，降低了安全隐患。
在一些实施例中，外壳于至少一个非凸起对应区域内设置有防爆阀。
通过采用上述技术方案，可以将防爆阀设置在至少一个非凸起对应区域内，从而在电芯发生热失控时，位于至少一个非凸起对应区域内的防爆阀排气畅通，从而进行排气，避免发生危险，进一步提高了安全性。
在一些实施例中，外壳于两个非凸起对应区域内均设置有防爆阀。
通过采用上述技术方案，在两个非凸起对应区域内均设置有防爆阀，即防爆阀的数量至少为两个，从而在电芯发生热失控时，可以在至少两个防爆阀处进行排气，提高了排气效果和速度，进一步提高了安全性，且分别在两个非凸起对应区域内设置有防爆阀，在电芯发生热失控时，能够在电池壳体的不同位置上进行排气，气体可以从就近的防爆阀处向外排出，提高了排气的速度和效果，进一步降低了危险性。
在一些实施例中，外壳于非凸起对应区域内设置多个防爆阀。
通过采用上述技术方案，可以在每个非区域对应区域内分别设置多个防爆阀，从而能够提高排气效果和效率，进一步提高了安全性。
在一些实施例中，设置于两个非凸起对应区域内的防爆阀相对称设置。
通过采用上述技术方案，对称设置的两个防爆阀能够避免防爆阀偏置而造成的排气不畅的问题，提高了排气效果和效率，进一步避免了电芯因热失控而造成爆炸的概率，提高了安全性，且对称设置的两个防爆阀使得电池壳体的外观更加美观整洁。
在一些实施例中，防爆阀为刻痕防爆阀或者焊接防爆阀。
通过采用上述技术方案，刻痕防爆阀是指在外壳上通过刻痕的形式形成防爆阀，使得外壳具有刻痕的位置相对外壳的其它位置更薄弱，从而在电芯发生热失控时，热失控产生的气体在压力达到一定值时能够冲破刻痕防爆阀进行排气，从而避免由于热失控造成的安全问题。焊接防爆阀是指通过焊接的方式在外壳上形成的防爆阀，外壳的焊接位置相对于外壳的其它位置更薄弱，从而在电芯发生热失控时，热失控产生的气体在压力达到一定值时能够冲焊接防爆阀进行排气，从而避免由于热失控造成的安全问题。
第二方面，本申请提供了一种电池单体，其包括上述实施例中的电池壳体和电芯，电芯设置在电池壳体的外壳内。
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实施例中的电池壳体，有效提高了电池单体的安全性能。
第三方面，本申请提供了一种电池，包括底板和上述实施例中的电池单体，多个电池单体依次排列设置，底板固定设置在多个电池单体的底部，且底板上的凸起与电池单体的电池壳体的凸起对应区域相对设置。
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实施例中的电池单体，有效提高了电池的安全性能。
第四方面，本申请提供了一种用电设备，其包括上述实施例中的电池，电池用于提供电能。
本申请实施例提供的用电设备的有益效果在于：本申请实施例提供的用电设备由于采用了上述实施例中的电池，有效提高了用电设备的安全性能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
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为本申请一些实施例提供的具有焊接防爆阀的电池壳体倒置的结构示意图；
图2为本申请一些实施例提供的具有刻痕防爆阀的电池壳体倒置的结构示意图；
图3为本申请一些实施例提供的电池的爆炸结构示意图一；
图4为本申请一些实施例提供的电池的爆炸结构示意图二；
图5为本申请一些实施例提供的电池的俯视图；
图6为图5所示的电池沿A-A线方向的剖视图。
具体实施方式中的附图标号如下：
1、电池壳体；11、外壳；111、凸起对应区域；112、非凸起对应区域；
12、防爆阀；
2、电芯；
3、电池单体；
4、底板；41、凸起；
100、电池。
具体实施方式
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”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。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本发明人注意到，随着电池被广泛应用，人们对电池的安全性能变得更加重视，在电芯发生热失控且电芯的内部压力超过规定值时，需要将电芯内部的气体进行排放才能避免电芯发生爆炸，因此，需要在电池壳体上设置防爆阀，从而当电芯的内部压力达到规定值时，气体就会冲破防爆阀，使得防爆阀打开进行排气，从而避免电芯发生爆炸。但由于电池的底板的中间区域设置有凸起，凸起的位置与防爆阀的位置相对应，即凸起会遮挡防爆阀，使得防爆阀不能够进行排气，这就会导致电芯在发生热失控时由于排气不畅而导致爆炸的发生，具有安全隐患。
为了避免电芯在发生热失控时由于排气不畅而导致爆炸的问题，发明人研究发现，可以将防爆阀与电池的底板的凸起相错设置，避免防爆阀被电池的底板的凸起遮挡，从而使得在电芯发生热失控时，避免防爆阀因排气不畅而造成的电芯爆炸。
基于以上考虑，为了解决在电芯发生热失控时因排气不畅而造成的爆炸的问题，发明人经过深入研究，设计了一种电池壳体，该电池壳体的外壳的底部 分为凸起对应区域和非凸起区域对应区域，凸起对应区域与电池的底板的凸起对应，非凸起对应区域与电池的底板的凸起相错设置，防爆阀设置在非凸起对应区域内，从而防爆阀能够不被电池的底板的凸起所遮挡，避免因防爆阀被遮挡而造成的排气不畅的问题，避免电芯发生爆炸。
在这样的电池壳体中，当电芯发生热失控且电芯的内部压力到达规定值时，气体会冲破防爆阀使得防爆阀打开，由于防爆阀设置在外壳的非凸起对应区域内，因此防爆阀不会被电池的底板的凸起遮挡，在防爆阀打开后气体能够顺畅地向外排出，从而避免电芯发生爆炸，提高了安全性。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池壳体、电池单体、电池等组成该用电设备的电源系统，这样，有利于在电芯发生热失控时，气体冲破防爆阀进行排气，避免了爆炸，提高了安全性。
本申请实施例提供一种使用电池作为电源的用电设备，用电设备可以为但不限于手机、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。
以下结合附图对本申请实施例提供的电池壳体1进行说明。
请参照图1和图2，图1为本申请一些实施例提供的电池壳体1的结构示意图。图2为本申请另一些实施例提供的电池壳体1的结构示意图。电池壳体1包括外壳11和防爆阀12，外壳11具有容纳电芯2的容纳空间，外壳11的底部分为凸起对应区域111和非凸起对应区域112，防爆阀12设置在非区域对应区域上。
请参照图3至图6，图3和图4为本申请一些实施例提供的电池100的结构示意图。电池100包括多个电池单体3，电池单体3是指组成电池100的最小单元。电池单体3包括有端盖、电池壳体1、电芯2以及其他的功能性部件。
端盖是指盖合于电池壳体1的开口处以将电池单体3的内部环境隔绝于外部环境的部件。不限地，端盖的形状可以与电池壳体1的形状相适应以配合电池壳体1。可选地，端盖可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖在受挤压碰撞时就不易发生形变，使电池单体3能够具备更高的结构强度，安全性能也可以有所提高。
电池壳体1是用于配合端盖以形成电池单体3的内部环境的组件，其中，形成的内部环境可以用于容纳电芯2、电解液以及其它部件。电池壳体1和端盖可以是独立的部件，可以于电池壳体1上设置开口，通过在开口处使端盖盖合开口以形成电池单体3的内部环境。不限地，也可以使端盖和电池壳体1一体化。电池壳体1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。具体地，电池壳体1的形状可以根据电芯2的具体形状和尺寸大小来确定。电池壳体1的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。电池壳体1包括外壳11和防爆阀12，外壳11容纳有电芯2，外壳11的底部设置在电芯2的下方，外壳11的底部具有凸起对应区域111和非凸起对应区域112，凸起对应区域111与电池100的底板4的凸起41对应，非凸起对应区域112与电池100的底板4的凸起41不对应，防爆阀12设置在外壳11的底部的非凸起对应区域112，当电芯2发生热失控且电芯2的内部压力达到一定值时，使得防爆阀12被冲破打开，由于防爆阀12不会被电池100的底板4的凸起41遮挡，使得气体能够畅通地排出，避免电芯2发生爆炸。
电芯2是电池单体3中发生电化学反应的部件。电芯2又称电极组件，主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电芯2的主体部，正极片和负极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池100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，极耳连接电极端子以形成电流回路。
请参照图3至图5，电池100包括底板4和多个依次排列的电池单体3，多个依次排列的电池单体3的底部设置有底板4，底板4上设置有凸起41，电池单体3的外壳11的底部与凸起41对应的区域为凸起对应区域111，电池单体3的外壳11的底部的不与凸起41对应的区域为非凸起对应区域112。
在电池100中，电池单体3可以是多个，多个电池单体3之间可串联或并联或混联，混联是指多个电池单体3中既有串联又有并联。多个电池单体3之间可直接串联或并联或混联在一起；当然，电池100也可以是多个电池单体3先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体。电池100还可以包括其它结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体3之间的电连接。
其中，每个电池单体3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3可呈圆柱体、扁平体、长方体或其它形状等。
根据本申请的一些实施例，请参照图1至图3，本申请提供了一种电池壳体1，包括外壳11和防爆阀12，外壳11的底部具有凸起对应区域111和非凸起对应区域112，凸起对应区域111与电池100的底板4的凸起41相对设置， 非凸起对应区域112与电池100的底板4的凸起41相错设置，防爆阀12设置在非凸起对应区域112。
外壳11为容纳电芯2的容纳壳，包括底部和侧部，底部设置在电芯2的下方，侧部为围合在电芯2侧壁的结构，在电池壳体1的下方还设置有电池100的底板4，电池100的底板4上设置有凸起41，外壳11的底部有部分区域与电池100的底部的凸起41对应，该区域即为凸起对应区域111，而外壳11的底部的不与凸起41对应的区域为非凸起对应区域112，而防爆阀12设置在外壳11的底部的非凸起对应区域112内，防爆阀12是外壳11上的薄壁阀体，防爆阀12能够在外壳11受到压力冲击时率先被冲破，达到排放气体的目的。
在外壳11的底部的非凸起对应区域112设置有防爆阀12，当电芯2发生热失控且电芯2的内部压力超过规定值时，防爆阀12被打开，气体会从防爆阀12处排出，由于防爆阀12设置在非凸起对应区域112，从而电池100的底板4的凸起41不会遮挡防爆阀12，从而避免出现防爆阀12排气不畅的问题，使得电池单体3中的气体能够畅通地排出，从而避免电芯2爆裂，减少了安全隐患，提高了安全性。
请参照图1至图3，根据本申请的一些实施例，凸起对应区域111设置于外壳11的底部的中间区域，凸起对应区域111的两侧均为非凸起对应区域112。
电池100的底板4上的凸起41设置在底板4的中心区域，从而与之对应的外壳11的底部的凸起对应区域111也设置在外壳11的底部的中心区域，而位于外壳11的底部的中心区域的凸起对应区域111的两侧则为非凸起对应区域112，当然，当电池100的底部的凸起41设置在边部或其它区域时，与之对应的外壳11的底部的凸起对应区域111的位置也会随之变化，同样地，外 壳11的底部除凸起对应区域111外的其它区域也会随之变化。
外壳11的底部的中间区域为凸起对应区域111，位于中间区域的凸起对应区域111的两侧为非凸起对应区域112，可以将防爆阀12设置在凸起对应区域111两侧的任意一个或两个非区域对应区域内，从而实现防爆阀12相对于凸起41的偏置，以在电芯2发生热失控时，避免因凸起41遮挡防爆阀12而造成的排气不畅的问题，从而实现排气通畅，避免了电芯2热失控时因排气不畅而发生的爆炸，降低了安全隐患。
根据本申请的一些实施例，外壳11于至少一个非凸起对应区域112设置有防爆阀12。
凸起对应区域111设置在外壳11的底部的中间区域，从而凸起对应区域111的两侧均为非凸起对应区域112，为了避免防爆阀12被电池100的底板4的凸起41遮挡，将防爆阀12设置在非凸起对应区域112即可，可以将防爆阀12设置在至少一个非凸起对应区域112内。
通过采用上述技术方案，可以将防爆阀12设置在至少一个非凸起对应区域112内，从而在电芯2发生热失控时，位于至少一个非凸起对应区域112内的防爆阀12能够不被凸起41遮挡，从而使得气体能够畅通地排出，不会发生排气不畅的现象，避免因排气不畅而发生的爆炸，降低了危险性，进一步提高了安全性。
请参照图1至图3，根据本申请的一些实施例，外壳11于两个非凸起对应区域112内均设置有防爆阀12。
两个非凸起对应区域112内均设置有防爆阀12，即防爆阀12的数量至少为两个，各个防爆阀12间隔设置。
通过在两个非凸起对应区域112内均设置有防爆阀12，而每个非凸起对 应区域112内设置有至少一个防爆阀12，即防爆阀12的数量至少为两个，从而在电芯2发生热失控时，可以在至少两个防爆阀12处进行排气，提高了排气效果和速度，进一步提高了安全性，且分别在两个非凸起对应区域112内设置有防爆阀12，在电芯2发生热失控时，能够在电池壳体1的不同位置上进行排气，气体可以从就近的防爆阀12处向外排出，提高了排气的速度和效果，进一步降低了危险性。
根据本申请的一些实施例，外壳11于非凸起对应区域112内设置多个防爆阀12。
通过采用上述技术方案，可以在每个非凸起对应区域112内分别设置多个防爆阀12，从而能够提高排气效果和效率，进一步提高安全性。
请参照图1至图3所示，根据本申请的一些实施例，设置于两个非凸起对应区域112内的防爆阀12相对称设置。
设置于两个非凸起对应区域112内的防爆阀12对称设置，即设置于两个非凸起对应区域112内的防爆阀12关于凸起对应区域111对称设置。
由于电池100的底板4的凸起41与外壳11的底部的中间区域相对应，从而将防爆阀12设置在外壳11的底部的非中间区域，此时防爆阀12相对于凸起41偏置，将两个非凸起对应区域112内的防爆阀12对称设置，能够使得排气畅通，从而能够避免防爆阀12偏置而造成的排气不畅的问题，提高了排气效果和效率，进一步避免了电芯2因热失控而造成爆炸的概率，提高了安全性，且对称设置的两个防爆阀12使得电池壳体1的外观更加美观整洁。
请参照图1和图2所示，根据本申请的一些实施例，防爆阀12为刻痕防爆阀或者焊接防爆阀。
刻痕防爆阀是指在外壳11上通过刻痕的形成防爆阀12，外壳11具有刻 痕的位置相对外壳11的其它位置更薄弱，因此在气体压力的冲击下更易被冲破打开；焊接防爆阀是指通过焊接的方式在外壳11上形成的防爆阀12，外壳11的焊接位置相对于外壳11的其它位置更薄弱，因此在气体压力的冲击下更易被冲破打开。
防爆阀12可以设置为刻痕防爆阀，也可以设置为焊接防爆阀，在电芯2发生热失控时，热失控产生的气体能够冲破刻痕防爆阀或焊接防爆阀并向外排出，从而避免由于热失控造成的安全问题。
第二方面，本申请实施例还提供了一种电池单体3，请参照图3至图6，电池单体3包括上述实施例中的电池壳体1和电芯2，电芯2设置在电池壳体1的外壳11内。
本申请实施例提供的电池单体3由于采用了上述实施例中的电池壳体1，有效提高了电池单体3的安全性能。
第三方面，本申请实施例还提供了一种电池100，包括以上任一方案的电池单体3和底板4，多个电池单体3依次排列设置，,底板4固定设置在多个电池单体3的底部，且底板4上的凸起41与电池单体3的电池壳体1的凸起对应区域111相对设置。
本申请实施例提供的电池100由于采用了上述实施例中的电池单体3，有效提高了电池100的安全性能。
第四方面，本申请实施例还提供了一种用电设备，包括以上任一方案的电池100，并且电池100用于为用电设备提供电能。
用电设备可以是前述任一应用电池100的设备或系统。
根据本申请的一些实施例，请参见图1至图6，本申请提供了一种电池壳体1，电池壳体1包括外壳11和防爆阀12，外壳11内部设置有电芯2，外壳 11的底部的中间区域设置有与电池100的底板4的凸起41相对的凸起对应区域111，外壳11的底部的凸起对应区域111两侧为两个非凸起对应区域112，外壳11于两个非凸起对应区域112内设置有防爆阀12，且位于两个非凸起对应区域112内的防爆阀12对称设置，从而电池100的底板4的凸起41不会遮挡防爆阀12，电池100的底板4的凸起41不会对防爆阀12的正常排气造成不良影响，当电芯2发生热失控且电芯2的内部压力超过规定值时，由于防爆阀12对称设置，从而电池100的底板4上的凸起41不会影响防爆阀12的排气，从而避免因造成的防爆阀12排气不畅的问题，电池100中的气体能够畅通地排出，从而避免电芯2爆裂，减少了安全隐患，提高了安全性。
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 (10)

  1. 一种电池壳体，用于电池单体，其中，包括：
    外壳，所述外壳的底部具有凸起对应区域和非凸起对应区域，所述凸起对应区域与电池的底板的凸起相对设置，所述非凸起对应区域与所述电池的底板的凸起相错设置；
    防爆阀，所述防爆阀设置在所述非凸起对应区域。
  2. 根据权利要求1所述的电池壳体，其中，所述凸起对应区域设置于所述外壳的底部的中间区域，所述凸起对应区域的两侧均为所述非凸起对应区域。
  3. 根据权利要求2所述的电池壳体，其中，所述外壳于至少一个所述非凸起对应区域设置有所述防爆阀。
  4. 根据权利要求3所述的电池壳体，其中，所述外壳于两个所述非凸起对应区域均设置有所述防爆阀。
  5. 根据权利要求2所述的电池壳体，其中，所述外壳于所述非凸起对应区域设置多个所述防爆阀。
  6. 根据权利要求5所述的电池壳体，其中，设置于两个所述非凸起对应区域的所述防爆阀相对称。
  7. 根据权利要求1-6任一项所述的电池壳体，其中，所述防爆阀为刻痕防爆阀或焊接防爆阀。
  8. 一种电池单体，其中，所述电池单体包括权利要求1-7中任一项所述的电池壳体；和
    电芯，所述电芯设置在所述电池壳体的外壳内。
  9. 一种电池，其中，所述电池包括：
    多个如权利要求8所述的电池单体，多个所述电池单体依次排列设置；
    底板，固定设置在多个所述电池单体的底部，且所述底板上的凸起与所述电池单体的电池壳体的凸起对应区域相对设置。
  10. 一种用电设备，其中，所述用电设备包括如权利要求9所述的电池。
PCT/CN2023/074956 2022-02-22 2023-02-08 电池壳体、电池单体、电池和用电设备 WO2023160389A1 (zh)

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CN215771430U (zh) * 2021-12-06 2022-02-08 比亚迪股份有限公司 电池包和具有其的车辆
CN217485659U (zh) * 2022-02-22 2022-09-23 宁德时代新能源科技股份有限公司 电池壳体、电池单体、电池和用电设备

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CN209401662U (zh) * 2019-03-28 2019-09-17 宁德时代新能源科技股份有限公司 电池包
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