WO2025222735A1 - 电池及用电装置 - Google Patents

电池及用电装置

Info

Publication number
WO2025222735A1
WO2025222735A1 PCT/CN2024/118615 CN2024118615W WO2025222735A1 WO 2025222735 A1 WO2025222735 A1 WO 2025222735A1 CN 2024118615 W CN2024118615 W CN 2024118615W WO 2025222735 A1 WO2025222735 A1 WO 2025222735A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
base plate
battery cell
thickness direction
wall portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/118615
Other languages
English (en)
French (fr)
Inventor
龙超
陈兴地
张文辉
王鹏
黄健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Publication of WO2025222735A1 publication Critical patent/WO2025222735A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/102Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/552Terminals characterised by their shape
    • H01M50/553Terminals adapted for prismatic, pouch or rectangular cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • This application relates to the field of battery technology, and more specifically, to a battery and an electrical device.
  • a battery consists of a casing and individual battery cells housed within it. As a core component of new energy vehicles, batteries have high requirements in terms of both lifespan and reliability.
  • a battery typically includes a casing and multiple battery cells housed within it. The outer casing of each battery cell has electrode terminals for inputting or outputting electrical energy, protruding from the outer surface of the casing. The casing also includes a pressure relief mechanism for releasing internal pressure.
  • existing batteries are highly susceptible to damage to the electrode terminals or pressure relief mechanism when subjected to impacts during use, leading to battery cell damage, short lifespan, and low reliability.
  • This application provides a battery and an electrical device that can effectively improve the battery's lifespan and reliability.
  • a battery including a housing, a battery cell assembly, and a support member;
  • the housing includes a base plate;
  • the battery cell assembly is housed within the housing, the battery cell assembly including at least one battery cell, the battery cell including a casing, electrode terminals, and a pressure relief mechanism, the casing having a wall portion, the wall portion facing the base plate along the thickness direction of the base plate, the electrode terminals and the pressure relief mechanism both being disposed on the casing, and at least one of the electrode terminals and the pressure relief mechanism being disposed on the wall portion;
  • the support member is disposed between the wall portion and the base plate and connected to the wall portion; wherein, along the thickness direction of the base plate, the support member has a first surface facing away from the wall portion, the first surface being closer to the base plate than the electrode terminals and the pressure relief mechanism.
  • the housing has a bottom plate located at the bottom of the battery cell, and the wall of the outer casing faces the bottom plate. At least one of the electrode terminals and the pressure relief mechanism of the battery cell is disposed on the wall, such that at least one of the electrode terminals and the pressure relief mechanism is disposed on the side of the outer casing facing the bottom plate.
  • the battery can provide some support to the bottom plate of the housing through the support member when the battery is subjected to bottom impact during bottom ball impact test or use, thereby improving the deformation resistance of the bottom plate under external impact.
  • This helps reduce the impact or collision of battery cells caused by deformation of the base plate.
  • the impact force on the base plate can first contact the support components, and the support components can disperse the impact force on the base plate, increasing the force-bearing area.
  • This effectively reduces the risk of impact damage to the electrode terminals or pressure relief mechanisms of the battery cells, and also reduces the risk of leakage, fire or explosion of the battery cells, which helps to improve the service life and reliability of the battery.
  • the first surface abuts against the base plate along the thickness direction of the base plate.
  • the support member is structured such that its two sides abut against the wall of the outer shell and the base plate of the box respectively in the thickness direction of the base plate.
  • the battery with this structure can reduce the gap between the support member and the base plate. On the one hand, it can improve the utilization rate of the battery's internal space, which is conducive to improving the battery's energy density. On the other hand, it can improve the support effect of the support member on the base plate, so as to further improve the base plate's resistance to deformation when subjected to external impact, thereby helping to reduce the phenomenon of impact or collision of battery cells due to deformation of the base plate.
  • the battery cell assembly includes a plurality of battery cells stacked along a first direction perpendicular to the thickness direction of the base plate; wherein, a support extends along the first direction and is connected to the walls of the outer shells of the plurality of battery cells in the battery cell assembly.
  • the battery cell group is provided with multiple battery cells stacked along the first direction.
  • the support member By setting the support member as a structure extending along the first direction and connecting the support member to the walls of the multiple battery cells in the battery cell group, the support member can support and protect the multiple battery cells in the battery cell group.
  • multiple battery cells in the battery cell group can be supported and protected by a single support member, eliminating the need for a separate support member for each battery cell. This effectively reduces the battery manufacturing cost and helps to reduce the assembly difficulty of the battery, thereby improving the assembly efficiency of the battery.
  • the battery includes a plurality of battery cell groups arranged along a second direction, which is perpendicular to the thickness direction of the base plate and the first direction; wherein, along the second direction, every two adjacent battery cell groups share a support member, and the support member is connected to the wall of the outer casing of the battery cells in the two adjacent battery cell groups.
  • the battery with this structure can, on the one hand, support and protect multiple battery cells in two adjacent battery cell groups with a single support member, which helps to reduce the manufacturing cost of the battery.
  • the support member can distribute the impact force on the base plate to multiple battery cells in the two adjacent battery cell groups, thereby further mitigating the phenomenon of the impact force on the base plate being concentrated on the battery cells, further reducing the local force concentration on the battery cells, and thus further improving the protection of the electrode terminals or pressure relief mechanism of the battery cells, thereby reducing the risk of the electrode terminals or pressure relief mechanism of the battery cells being damaged by impact.
  • a cavity is formed inside the support member, and the cavity extends through both ends of the support member along a first direction.
  • the weight of the support member can be reduced, and the support member can be made capable of collapsing and absorbing energy when subjected to large impact forces, while also reducing the weight of the support member.
  • the difficulty in forming the cavity of the support helps to reduce the manufacturing difficulty of the support.
  • a cavity is formed inside the support member.
  • the weight of the support can be reduced, which is beneficial to improving the energy density of the battery.
  • the support can have the ability to collapse and absorb energy when subjected to a large impact force, which is beneficial to improving the protection effect of the support on the battery cells.
  • the support is bonded to the wall.
  • the structure of adhesive connection is used to connect the support and the wall of the shell.
  • it is convenient to assemble and helps to reduce the connection difficulty between the support and the wall of the shell.
  • it can ensure that the connection and assembly between the support and the wall of the shell does not affect the battery cells, which helps to alleviate the phenomenon of the support damaging the battery cells.
  • the elastic modulus of the material of the support member is greater than or equal to 1000 MPa.
  • the support component has sufficient rigidity, thereby improving the support effect between the base plate and the battery cell when the base plate is subjected to impact deformation, and making the support component have sufficient anti-deformation ability so that the support component can better distribute and disperse the impact force.
  • the support is made of an insulating material.
  • the battery cell will not form a circuit connection with the support component, thereby reducing the risk of short circuits inside the battery and improving the reliability of the battery.
  • the pressure relief mechanism is disposed on the wall portion; wherein, in a plane perpendicular to the thickness direction of the base plate, the orthographic projection of the pressure relief mechanism does not overlap with the orthographic projection of the support member.
  • the support member does not cover or obstruct the pressure relief mechanism in the thickness direction of the base plate, thereby reducing the obstruction and interference of the support member on the pressure relief mechanism, and improving the smoothness of the pressure relief mechanism when releasing the internal pressure of the battery cell.
  • both the electrode terminals and the pressure relief mechanism are disposed on the wall portion.
  • the electrode terminals and the pressure relief mechanism are located at the end of the battery cell's casing facing the bottom plate in the thickness direction, which facilitates assembly and manufacturing. Furthermore, the support member can simultaneously support and protect the electrode terminals and the pressure relief mechanism.
  • electrode terminals are disposed on the wall portion; wherein the battery further includes a buffer member disposed between the electrode terminals and the base plate along the thickness direction of the base plate, and at least a portion of the projection of the electrode terminals is located within the buffer member.
  • the battery is also provided with a buffer.
  • the buffer By placing the buffer between the electrode terminals and the base plate in the thickness direction of the base plate, and covering at least a portion of the electrode terminals in the thickness direction of the base plate, the buffer can absorb the impact force transmitted by the base plate when the base plate is deformed by impact, thereby reducing the impact force acting on the electrode terminals.
  • This can buffer and protect the electrode terminals, further reducing the risk of battery cells being damaged by impact, which is beneficial to improving the battery's service life and reliability.
  • the buffer can also further increase the support effect on the base plate when the base plate is deformed by impact, thereby further improving the base plate's resistance to deformation when subjected to external impact, which is beneficial to reducing the phenomenon of impact or collision with battery cells due to base plate deformation.
  • the buffer covers the electrode terminals along the thickness direction of the base plate.
  • the projection of the electrode terminals in the thickness direction of the base plate is entirely located within the buffer, which helps to further enhance the buffering and protection effect of the buffer on the electrode terminals.
  • the battery further includes a current-combining component; the current-combining component is disposed in the housing and connected to the end of the electrode terminal facing the bottom plate along the thickness direction of the base plate to electrically connect the battery cell; wherein, along the thickness direction of the base plate, the first surface is closer to the base plate than the current-combining component, and a buffer is disposed between the current-combining component and the base plate.
  • a current-combining component is also provided inside the battery casing.
  • the input or output of electrical energy from the battery cells can be realized.
  • the buffer also provides a certain degree of cushioning and protection for the current-combining component.
  • the support component also provides a certain degree of support and protection for the current-combining component.
  • the two sides of the buffer abut against the busbar and the base plate, respectively.
  • the gap between the buffer and the base plate can be reduced.
  • it can improve the utilization rate of the internal space of the battery, which is conducive to improving the energy density of the battery.
  • it can improve the buffering effect of the buffer on the busbar and the electrode terminals, and further improve the support effect of the buffer on the base plate, so as to further improve the deformation resistance of the base plate when subjected to external impact, thereby helping to reduce the phenomenon of impact or collision of battery cells due to deformation of the base plate.
  • the battery cell assembly includes multiple battery cells stacked along a first direction, and a busbar connects the electrode terminals of the multiple battery cells.
  • the first direction is perpendicular to the thickness direction of the base plate.
  • a buffer extends along the first direction and covers the electrode terminals of the multiple battery cells along the thickness direction of the base plate.
  • the battery cell group is provided with multiple battery cells stacked along a first direction, and the busbar connects the electrode terminals of the multiple battery cells to realize parallel or series connection between the multiple battery cells.
  • the structure is simple and easy to implement. Specifically, by setting the buffer to extend along the first direction and covering the electrode terminals of the multiple battery cells in the thickness direction of the base plate, the buffer can buffer and protect the electrode terminals of the multiple battery cells in the battery cell group. This eliminates the need for a separate buffer for each battery cell's electrode terminal, which helps reduce battery manufacturing costs and assembly difficulty, thereby improving battery assembly efficiency.
  • the battery cell includes two electrode terminals with opposite polarities, namely a first electrode terminal and a second electrode terminal, which are spaced apart on the wall along a second direction perpendicular to the thickness direction of the base plate and the first direction.
  • each battery cell group is provided with two buffer components, which are arranged at intervals along the second direction.
  • one buffer component covers the first electrode terminals of multiple battery cells, and the other buffer component covers the second electrode terminals of multiple battery cells.
  • each battery cell is provided with a first electrode terminal and a second electrode terminal with opposite polarities to input or output the positive and negative electrodes of the battery cell respectively.
  • one buffer covers the first electrode terminals of multiple battery cells and the other buffer covers the second electrode terminals of multiple battery cells, so that the first electrode terminals and the second electrode terminals of the battery cells are buffered and protected by the two buffers respectively.
  • the structure is simple and easy to assemble.
  • the buffer is connected to the busbar.
  • the reliability of the buffer between the base plate and the busbar component is improved.
  • the buffer is bonded to the busbar component.
  • the structure of adhesive connection is used to connect the buffer and the busbar component.
  • it is easy to assemble and helps to reduce the difficulty of connecting the buffer and the busbar component.
  • it can ensure that the connection and assembly between the buffer and the busbar component does not affect the busbar component, which helps to alleviate the phenomenon of the buffer damaging the busbar component.
  • the elastic modulus of the buffer material is greater than or equal to 3 MPa and less than or equal to 100 MPa.
  • the elastic modulus of the buffer material is greater than or equal to 3MPa and less than or equal to 100MPa.
  • the elastic modulus of the buffer material is greater than or equal to 3MPa and less than or equal to 100MPa.
  • the elastic modulus of the buffer material is set to be greater than or equal to 3MPa, the phenomenon that the buffer is too soft and therefore has poor effect in absorbing impact force can be alleviated, and the phenomenon that the buffer is not good at distributing and dispersing impact force can also be alleviated.
  • the elastic modulus of the buffer material is less than or equal to 100MPa, the phenomenon that the buffer is too stiff and therefore directly transmits the impact force received to the electrode terminal can be alleviated, thereby improving the buffering and protection effect of the buffer on the electrode terminal.
  • the buffer is made of insulating material.
  • the electrode terminals of the battery cell will not form a circuit connection with the buffer, thereby reducing the risk of short circuit inside the battery and improving the reliability of the battery.
  • the pressure relief mechanism is disposed on the wall portion; wherein, in a plane perpendicular to the thickness direction of the base plate, the orthographic projection of the pressure relief mechanism does not overlap with the orthographic projection of the buffer.
  • the buffer does not cover or obstruct the pressure relief mechanism in the thickness direction of the base plate, thereby reducing the obstruction and interference of the buffer on the pressure relief mechanism, and improving the smoothness of the pressure relief mechanism when releasing the internal pressure of the battery cell.
  • the housing further includes a top plate; the top plate and the bottom plate are disposed opposite each other along the thickness direction of the bottom plate and are respectively located on both sides of the battery cell; wherein, along the thickness direction of the bottom plate, the outer shell is connected to the top plate.
  • the battery cell is suspended inside the box.
  • this reduces the load on the bottom plate and improves its load-bearing capacity.
  • it alleviates the phenomenon of the battery cell being pressed against the bottom plate by the support, thereby optimizing the stress on the support and improving the support and protection of the battery cell when the bottom plate is impacted.
  • the housing is bonded to the top plate.
  • the battery cell shell and the top plate of the box are connected by an adhesive connection.
  • this facilitates assembly and reduces the difficulty of connecting the battery cell shell and the top plate of the box.
  • it ensures that the connection and assembly between the battery cell shell and the top plate of the box does not affect the battery cell, which helps to alleviate the phenomenon of battery cell damage.
  • the housing includes a housing and an end cap; the interior of the housing forms a receiving cavity with an opening for receiving an electrode assembly, the opening being located at one end of the housing facing the base plate in the thickness direction; the end cap closes the opening; wherein the end cap is a wall portion.
  • the battery cell with this structure is easy to assemble electrode terminals or pressure relief mechanisms on the end cap, and can reduce the difficulty of electrical connection between electrode terminals and electrode components, thereby reducing the manufacturing difficulty of the battery cell and improving the production efficiency of the battery cell.
  • the housing includes a housing and an end cap; the housing includes an integrally formed sidewall and a wall portion, the sidewall surrounding the wall portion, one end of the sidewall being connected to the wall portion along the thickness direction of the base plate, and the other end forming an opening, the sidewall and the wall portion together defining a receiving cavity for accommodating an electrode assembly; the end cap closes the opening.
  • the battery cell with this structure can ensure that the area of the outer casing where the electrode terminals or pressure relief mechanism are set is far away from the end cap.
  • it can alleviate the phenomenon that the pulling or torsional force of other components on the electrode terminals is directly applied to the end cap, thereby reducing the risk of connection failure between the end cap and the casing and helping to reduce the risk of leakage during battery cell use.
  • embodiments of this application also provide an electrical device, including the battery described above, which is used to provide electrical energy.
  • FIG. 1 is a schematic diagram of the vehicle structure provided in some embodiments of this application.
  • FIG. 2 is an exploded view of the battery structure provided in some embodiments of this application.
  • FIG. 3 is a schematic diagram of the structure of a battery (after removing the base plate) provided in some embodiments of this application;
  • Figure 4 is a cross-sectional view of a battery provided in some embodiments of this application.
  • Figure 5 is a magnified view of part A of the battery shown in Figure 4.
  • Figure 6 is a schematic diagram of the structure of a battery cell provided in some embodiments of this application.
  • Figure 7 is an exploded view of the structure of a battery cell provided in some embodiments of this application.
  • FIG. 8 is a schematic diagram of the structure of the battery support provided in some embodiments of this application.
  • Figure 9 is a magnified view of part B of the battery shown in Figure 4.
  • Icons 1000 - Vehicle; 100 - Battery; 10 - Housing; 11 - Base plate; 12 - Top plate; 13 - Frame; 20 - Battery cell pack; 21 - Battery cell; 211 - Housing; 2111 - Wall; 2112 - Housing; 2112a - Opening; 2113 - End cap; 212 - Electrode terminal; 213 - Pressure relief mechanism; 214 - Electrode assembly; 2141 - Tab; 215 - Current collector; 30 - Support; 31 - First surface; 32 - Cavity; 33 - Assembly hole; 40 - Current collector component; 50 - Electrode output seat; 60 - Buffer; 200 - Controller; 300 - Motor; X - Thickness direction of base plate; Y - First direction; Z - Second direction.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components.
  • connection can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components.
  • the term "and/or” is merely a description of the relationship between related objects, indicating that three relationships can exist.
  • a and/or B can represent: A existing alone, A and B existing simultaneously, or B existing alone.
  • the character "/" generally indicates that the preceding and following related objects have an "or" relationship.
  • multiple means two or more (including two).
  • the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.
  • the battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.
  • a single battery cell typically includes an electrode assembly.
  • the electrode assembly includes a positive electrode, a negative electrode, and a separator.
  • active ions such as lithium ions
  • the separator positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.
  • the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
  • the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.
  • the positive electrode current collector can be a metal foil or a composite current collector.
  • a metal foil it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc.
  • Composite current collectors can include a polymer material base layer and a metal layer.
  • Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds.
  • lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4 ), lithium manganese phosphate and carbon composites, lithium manganese iron phosphate, and lithium manganese iron phosphate and carbon composites.
  • lithium transition metal oxides may include, but are not limited to, lithium cobalt oxides (such as LiCoO2 ), lithium nickel oxides (such as LiNiO2 ), lithium manganese oxides (such as LiMnO2 , LiMn2O4 ) , lithium nickel cobalt oxides, lithium manganese cobalt oxides, lithium nickel manganese oxides, lithium nickel cobalt manganese oxides (such as LiNi 1/3 Co 1/3 Mn 1/3 O2 (also abbreviated as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (also abbreviated as7) At least one of the following: NCM 523 , LiNi 0.5 Co 0.25 Mn 0.25 O 2 (also known as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O 2 (also known as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O 2 (also known as NCM 811 ), lithium nickel cobalt aluminum oxides (such as LiNi
  • the positive electrode can be a foamed metal.
  • the foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc.
  • the surface of the foamed metal may or may not contain a positive electrode active material.
  • lithium source material, potassium metal, or sodium metal can also be filled and/or deposited within the foamed metal, where the lithium source material is lithium metal and/or a lithium-rich material.
  • the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.
  • the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector.
  • a metal foil it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, nickel, or titanium, etc.
  • Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc.
  • Composite current collectors can include a polymer material base layer and a metal layer.
  • Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • a metal material copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.
  • a polymer material substrate such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.
  • the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.
  • the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.
  • the negative electrode active material may be a negative electrode active material known in the art for use in battery cells.
  • the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc.
  • Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys.
  • Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys.
  • this application is not limited to these materials, and other conventional materials that can be used as battery negative electrode active materials may also be used. These negative electrode active materials may be used alone or in combination of two or more.
  • the positive current collector can be made of aluminum, and the negative current collector can be made of copper.
  • the electrode assembly further includes an isolator disposed between the positive and negative electrodes.
  • the separator is a separator membrane.
  • the separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.
  • the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride.
  • the separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different.
  • the separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.
  • the separator is a solid electrolyte.
  • the solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.
  • the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes.
  • the electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.
  • the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.
  • the solvent may include at least one selected from ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone.
  • the solvent may also be an ether solvent.
  • Ether solvents may include one or more selected from ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.
  • the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.
  • Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.
  • polymer solid electrolytes can be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.
  • inorganic solid electrolytes may include one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.
  • oxide solid electrolytes crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film
  • sulfide solid electrolytes crystalline lithium superconducting ion conductor (lithium germanium phosphate sulfide, silver sulfide germanium ore), amorphous sulfides)
  • halide solid electrolytes nitride solid electrolytes, and hydr
  • composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.
  • the electrode assembly is a wound structure.
  • the positive and negative electrode sheets are wound into a wound structure.
  • the electrode assembly is a stacked structure.
  • multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.
  • multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.
  • both the positive and negative electrode plates are folded to form multiple stacked folded segments.
  • multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.
  • the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.
  • the electrode assembly can be cylindrical, flat, or polygonal, etc.
  • the electrode assembly has tabs that allow current to be drawn from the electrode assembly.
  • the tabs include a positive tab and a negative tab.
  • the battery cell may include a housing.
  • the housing is used to encapsulate components such as electrode assemblies and electrolytes.
  • the housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.
  • a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes.
  • Cylindrical cells include, but are not limited to, prismatic cells, blade-shaped cells, and multi-faceted prism cells, such as hexagonal prism cells.
  • the battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.
  • the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.
  • the battery can be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.
  • the housing may be part of the vehicle's chassis structure.
  • a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.
  • the battery can be an energy storage device.
  • Energy storage devices include energy storage containers, energy storage cabinets, etc.
  • the development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, discharge capacity, and charge/discharge rate.
  • performance parameters like energy density, cycle life, discharge capacity, and charge/discharge rate.
  • battery safety must also be taken into account.
  • a typical battery it usually consists of a casing and multiple battery cells housed within the casing.
  • Each battery cell includes a housing and electrode terminals on the housing. Connecting the electrode terminals of multiple battery cells via a busbar allows for series or parallel connection between the cells.
  • the battery cell housing also features a pressure relief mechanism to release internal pressure and reduce the risk of explosion due to thermal runaway.
  • impacts due to the complex operating conditions of batteries, they are frequently subjected to impacts from the external environment, making the casing highly susceptible to compression after deformation from such impacts. Impacts can directly transfer force to individual battery cells, easily damaging the pressure relief mechanism and protruding electrode terminals on the battery cell's casing.
  • a battery including a casing, a battery cell assembly, and a support member.
  • the casing includes a base plate.
  • the battery cell assembly is housed within the casing, and the battery cell assembly includes at least one battery cell.
  • Each battery cell includes a housing, electrode terminals, and a pressure relief mechanism.
  • the housing has a wall portion, which faces the base plate along its thickness direction. Both the electrode terminals and the pressure relief mechanism are disposed within the housing, and at least one of the electrode terminals and the pressure relief mechanism is disposed within the wall portion.
  • the support member is disposed between the wall portion and the base plate and is connected to the wall portion. Along the thickness direction of the base plate, the support member has a first surface facing away from the wall portion, and this first surface is closer to the base plate than the electrode terminals and the pressure relief mechanism.
  • the casing has a base plate located at the bottom of the individual battery cells.
  • the outer wall faces the base plate, and at least one of the electrode terminals and pressure relief mechanism of the individual battery cells is disposed on the wall. This ensures that the side of the outer casing facing the base plate has both the electrode terminals and the pressure relief mechanism.
  • a support member is provided between the base plate and the outer wall, connected to the wall. The first surface of the support member facing away from the wall is closer to the base plate than the electrode terminals and pressure relief mechanism.
  • the impact force on the base plate can first contact the support components, and the support components can disperse the impact force on the base plate, increasing the force-bearing area.
  • the batteries disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft.
  • a power system comprising such an electrical device can be constructed using batteries disclosed in this application. This helps to mitigate the problem of individual battery cells being damaged by impacts during use, thereby improving battery life and reliability.
  • the electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.
  • Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.
  • Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.
  • FIG. 1 is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application.
  • the vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.
  • a battery 100 is installed inside the vehicle 1000.
  • the battery 100 can be located at the bottom, front, or rear of the vehicle 1000.
  • the battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source or general power source for the vehicle 1000.
  • the vehicle 1000 may also include a controller 200 and a motor 300.
  • the controller 200 controls the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.
  • the battery 100 can not only serve as the operating power or power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
  • Figure 2 is an exploded view of the battery 100 provided in some embodiments of this application;
  • Figure 3 is a schematic diagram of the battery 100 (after removing the bottom plate 11) provided in some embodiments of this application;
  • Figure 4 is a cross-sectional view of the battery 100 provided in some embodiments of this application;
  • Figure 5 is a partial enlarged view of point A of the battery 100 shown in Figure 4;
  • Figure 6 is a schematic diagram of the structure of a battery cell 21 provided in some embodiments of this application.
  • This application provides a battery 100, which includes a housing 10, a battery cell assembly 20, and a support member 30.
  • the housing 10 includes a bottom plate 11.
  • the battery cell assembly 20 is housed within the housing 10, and the battery cell assembly 20 includes at least one battery cell 21, which includes a casing. 211. Electrode terminal 212 and pressure relief mechanism 213.
  • the housing 211 has a wall portion 2111. Along the thickness direction X of the base plate, the wall portion 2111 faces the base plate 11. Both the electrode terminal 212 and the pressure relief mechanism 213 are disposed in the housing 211, and at least one of the electrode terminal 212 and the pressure relief mechanism 213 is disposed in the wall portion 2111.
  • a support member 30 is disposed between the wall portion 2111 and the base plate 11 and is connected to the wall portion 2111. Along the thickness direction X of the base plate, the support member 30 has a first surface 31 facing away from the wall portion 2111. The first surface 31 is closer to the base plate 11 than the electrode terminal 212 and the pressure relief mechanism 213.
  • the housing 10 provides assembly space for the battery cells 21, and the housing 10 can adopt various structures.
  • the housing 10 includes a bottom plate 11, a top plate 12, and a frame 13.
  • the frame 13 is a hollow structure with both ends open in the thickness direction X of the bottom plate, that is, the frame 13 is an annular structure surrounding the outside of the battery cell assembly 20.
  • the bottom plate 11 and the top plate 12 are arranged opposite to each other along the thickness direction X of the bottom plate, and the bottom plate 11 and the top plate 12 are respectively connected to the two sides of the frame 13 in the thickness direction X of the bottom plate, so that the bottom plate 11, the top plate 12, and the frame 13 together define the assembly space for accommodating the battery cells 21.
  • the base plate 11 serves to support the battery cell group 20 or other components within the battery 100. That is, the thickness direction X of the base plate is the direction of gravity or approximately the direction of gravity, and the base plate 11 is located at the bottom of the battery cell 21 in the thickness direction X of the base plate. Correspondingly, the top plate 12 is located at the top of the battery cell 21.
  • the bottom plate 11, the top plate 12 and the frame 13 are separate but connected structures to facilitate the assembly of components such as the battery cell 21 into the housing 10.
  • the base plate 11 can be connected to one side of the frame 13 in the thickness direction X of the base plate by means of bonding, welding or bolting.
  • the top plate 12 can also be connected to the side of the frame 13 away from the base plate 11 in the thickness direction X of the base plate by means of bonding, welding or bolting.
  • the structure of the housing 10 can be various.
  • the bottom plate 11 and the frame 13 can be integrally formed, while the top plate 12 and the frame 13 can be separately formed.
  • the top plate 12 and the frame 13 can also be integrally formed, while the bottom plate 11 and the frame 13 can be separately formed.
  • the box 10 can also be of various shapes, such as a cylinder, cuboid, or cube.
  • the box 10 is a cuboid.
  • the height direction of the box 10 is the thickness direction X of the base plate
  • the width direction of the box 10 is the first direction Y
  • the length direction of the box 10 is the second direction Z.
  • the thickness direction X of the base plate, the first direction Y, and the second direction Z are all perpendicular to each other.
  • the battery 100 there may be one or more battery cell groups 20 housed within the housing 10.
  • the multiple battery cell groups 20 may be connected in series, in parallel, or in a mixed manner.
  • a mixed manner means that the multiple battery cell groups 20 are connected in both series and parallel.
  • the battery 100 may include a plurality of battery cell groups 20 arranged along a second direction Z.
  • the battery cell pack 20 includes at least one battery cell 21, meaning that each battery cell pack 20 may contain one or more battery cells 21.
  • the battery cell pack 20 includes multiple battery cells 21, the multiple battery cells 21 may be connected in series, parallel, or in a mixed configuration.
  • the battery 100 includes a plurality of battery cell groups 20 arranged along a second direction Z, and each battery cell group 20 includes a plurality of battery cells 21 stacked along a first direction Y, so that the plurality of battery cells 21 are arranged in an array and assembled within the housing 10.
  • the first direction Y is the thickness direction of the battery cells 21, such that the plurality of battery cells 21 in the battery cell group 20 are stacked along the thickness direction of the battery cells 21.
  • the battery 100 may further include a busbar 40, which is used to electrically connect a plurality of battery cells 21 in the battery cell group 20 to realize series or parallel connection between the plurality of battery cells 21 in the battery cell group 20.
  • the busbar 40 is also used to electrically connect two adjacent battery cell groups 20 to realize series or parallel connection between the two adjacent battery cell groups 20.
  • the busbar 40 is connected to the electrode terminal 212 of the battery cell 21.
  • the battery 100 may further include an electrode output socket 50, which is installed inside the housing 10 and connected to the busbar 40 to output or input electrical energy from the battery 100.
  • each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these.
  • the battery cell 21 can be in the form of a cuboid, cylinder, prism, or other shapes.
  • the battery cell 21 is a cuboid structure.
  • the thickness direction X of the base plate is also the height direction of the battery cell 21
  • the first direction Y is also the thickness direction of the battery cell 21
  • the second direction Z is also the length direction of the battery cell 21.
  • the outer casing 211 can also be used to contain an electrolyte, such as an electrolyte solution.
  • the outer casing 211 can have various structural forms.
  • the material of the outer casing 211 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc.
  • FIG. 7 is an exploded view of the structure of a battery cell 21 provided in some embodiments of this application.
  • the battery cell 21 also includes an electrode assembly 214, which is housed within a housing 211 and electrically connected to electrode terminals 212 to enable the input or output of electrical energy from the battery cell 21.
  • the housing 211 may include a shell 2112 and an end cap 2113.
  • the shell 2112 has an internal cavity with an opening 2112a at one end, meaning the shell 2112 is a hollow structure with one open end.
  • the end cap 2113 covers the opening 2112a of the shell 2112, forming a sealed connection to create a sealed space for accommodating the electrode assembly 214 and the electrolyte.
  • the wall portion 2111 for setting the electrode terminal 212 or the pressure relief mechanism 213 can be an end cap 2113 or one of the multiple walls of the housing 2112.
  • the wall portion 2111 can also be an end cap 2113 of the housing 211.
  • the opening 2112a is located at one end of the housing 2112 facing the bottom plate 11 of the box 10 in the thickness direction X of the bottom plate, such that the thickness direction X of the bottom plate is the thickness direction of both the wall portion 2111 and the end cap 2113.
  • the wall portion 2111 can also be a bottom wall of the housing 2112 disposed opposite to the end cap 2113 in the thickness direction X of the bottom plate.
  • the thickness direction X of the bottom plate is the arrangement direction of the end cap 2113 and the wall portion 2111.
  • the wall portion 2111 can also be a side wall adjacent to and abutting against the end cap 2113 of the housing 2112.
  • the wall portion 2111 faces the base plate 11, that is, the outer casing 211 of the battery cell 21 is located along the thickness direction X of the base plate.
  • the wall facing the end of the base plate 11 is called wall portion 2111.
  • the electrode assembly 214 When assembling the battery cell 21, the electrode assembly 214 can be placed into the housing 2112 first, and the electrolyte can be filled into the housing 2112. Then, the end cap 2113 can be placed on the opening 2112a of the housing 2112 to close the opening 2112a of the housing 2112.
  • the housing 2112 can have various shapes, such as a cylinder or a cuboid.
  • the shape of the housing 2112 can be determined according to the specific shape of the electrode assembly 214. For example, if the electrode assembly 214 is a cylindrical structure, then the housing 2112 can be a cylindrical structure; if the electrode assembly 214 is a cuboid structure, then the housing 2112 can be a cuboid structure.
  • the end cap 2113 can also have various structures, such as a plate-like structure or a hollow structure with one end open. For example, in Figures 6 and 7, the housing 2112 is a cuboid structure.
  • the housing 211 is not limited to the structure described above.
  • the housing 211 can also be other structures.
  • the housing 211 includes a shell 2112 and two end caps 2113.
  • the shell 2112 is a hollow structure with openings 2112a on opposite sides.
  • One end cap 2113 is fitted onto one opening 2112a of the shell 2112 to form a sealed connection, thereby forming a sealed space for accommodating the electrode assembly 214 and the electrolyte.
  • Electrode assembly 214 is a component in battery cell 21 where electrochemical reactions occur.
  • the structure of electrode assembly 214 can be various.
  • electrode assembly 214 can be a wound structure formed by winding positive electrode, separator and negative electrode, or a stacked structure formed by stacking positive electrode, separator and negative electrode.
  • the separator is a separator membrane
  • the main material of the separator membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.
  • One end of the electrode assembly 214 has a tab 2141, which is used to input or output the positive or negative electrode of the electrode assembly 214.
  • the tab 2141 is used to connect with the electrode terminal 212 to realize the electrical connection between the electrode assembly 214 and the electrode terminal 212.
  • the tab 2141 of the electrode assembly 214 is a component formed by stacking and connecting the regions of the positive electrode sheet that are not coated with a positive active material layer, or a component formed by stacking and connecting the regions of the negative electrode sheet that are not coated with a negative active material layer.
  • the tab 2141 is a component formed by stacking and connecting the regions of the positive electrode sheet that are not coated with a positive active material layer; if the tab 2141 is used to output the negative electrode of the electrode assembly 214, then the tab 2141 is a component formed by stacking and connecting the regions of the negative electrode sheet that are not coated with a negative active material layer.
  • the electrode assembly 214 housed within the housing 211 can be one or more.
  • the housing 211 of the battery cell 21 is provided with two electrode assemblies 214, which are stacked along the first direction Y, that is, the two electrode assemblies 214 are stacked along the thickness direction of the battery cell 21.
  • the electrode assembly 214 housed within the housing 211 can be one, three, four, five, six, seven, or eight, etc.
  • the electrode terminal 212 serves to output or input electrical energy from the battery cell 21.
  • the electrode terminal 212 is insulatedly mounted on the housing 211 and protrudes from the outer surface of the housing 211, meaning that no electrical connection is formed between the electrode terminal 212 and the housing 211.
  • the electrode terminal 212 is insulatedly mounted on the wall portion 2111 and protrudes from the side of the wall portion 2111 facing the base plate 11 in the thickness direction X of the base plate. That is, no electrical connection is formed between the electrode terminal 212 and the wall portion 2111, and the electrode terminal 212 protrudes from the surface of the wall portion 2111 facing the base plate 11 in the thickness direction X of the base plate towards the base plate 11.
  • the material of the electrode terminal 212 can be various, such as copper, iron, aluminum, steel, aluminum alloy, etc.
  • the electrode terminal 212 can be directly connected to the tab 2141 of the electrode assembly 214, such as by welding or abutting, or it can be indirectly connected to the tab 2141 of the electrode assembly 214 through other components.
  • the battery cell 21 may further include a current collector 215 disposed within the housing 211.
  • the current collector 215 connects the electrode terminal 212 and the tab 2141 of the electrode assembly 214 to realize the electrical connection between the electrode assembly 214 and the electrode terminal 212.
  • the current collector 215 is welded to the electrode terminal 212, and the current collector 215 is also welded to the tab 2141 of the electrode assembly 214.
  • the current collector 215 may also be a structure that abuts against the electrode terminal 212, and similarly, the current collector 215 may also be a structure that abuts against the tab 2141 of the electrode assembly 214.
  • the battery cell 21 includes two electrode terminals 212 and two current collectors 215.
  • the two electrode terminals 212 are spaced apart along the second direction Z on the wall portion 2111, and the two current collectors 215 are spaced apart along the second direction Z inside the housing 211.
  • each electrode assembly 214 has two tabs 2141, which are spaced apart along the second direction Z and have opposite polarities.
  • the two electrode terminals 212 are electrically connected to the two tabs 2141 of the electrode assembly 214 through the two current collectors 215, respectively, to realize the input or output of the positive and negative electrodes of the battery cell 21. That is, the two electrode terminals 212 are used to output or input the positive and negative electrodes of the battery cell 21, respectively.
  • the two tabs 2141 are the positive and negative tabs of the electrode assembly 214.
  • the pressure relief mechanism 213 serves to release the internal pressure of the battery cell 21 when the internal pressure or temperature of the battery cell 21 reaches a predetermined value.
  • At least one of the electrode terminal 212 and the pressure relief mechanism 213 is disposed on the wall portion 2111. That is, only one of the electrode terminal 212 and the pressure relief mechanism 213 may be disposed on the wall portion 2111, or both may be disposed on the wall portion 2111.
  • the pressure relief mechanism 213 is also disposed on the wall portion 2111, that is, both the electrode terminal 212 and the pressure relief mechanism 213 are disposed on the wall portion 2111.
  • the wall portion 2111 is an end cap 2113, and correspondingly, both the electrode terminal 212 and the pressure relief mechanism 213 are disposed on the end cap 2113 of the housing 211.
  • only the electrode terminal 212 may be disposed on the wall portion 2111, while the pressure relief mechanism 213 may be disposed on other walls of the housing 211.
  • only the pressure relief mechanism 213 may be disposed on the wall portion 2111, while the electrode terminal 212 may be disposed on other walls of the housing 211.
  • the pressure relief mechanism 213 and the outer shell 211 can be an integrally formed structure or a separate structure. If the pressure relief mechanism 213 and the outer shell 211 are separate structures, the pressure relief mechanism 213 can be connected to the outer shell 211 by welding or other means. Correspondingly, the pressure relief mechanism 213 can be a pressure relief component such as an explosion-proof valve, explosion-proof disc, gas valve, pressure relief valve, or safety valve. If the pressure relief mechanism 213 and the outer shell 211 are an integrally formed structure, the pressure relief mechanism 213 is a region on the outer shell 211 with a weak structure, such as a region on the outer shell 211 with a groove.
  • the support member 30 is disposed on the base plate 11 of the housing 10 and the outer shell of the battery cell 21 in the thickness direction X of the base plate.
  • the support member 30 is connected to the wall portion 2111 of the battery cell 21, and serves to support the bottom plate 11 of the housing 10 and the wall portion 2111 of the battery cell 21.
  • the support member 30 can be made of various materials. It can be an insulating material, such as carbon fiber, epoxy resin, polyurethane resin, plastic, or ceramic. Alternatively, it can be a metal material, such as copper, iron, aluminum, steel, or aluminum alloy. It should be noted that when the support member 30 is made of metal, an insulating film needs to be wrapped around its outer surface to insulate it from the battery cell 21 and other components such as the housing 10.
  • connection structure between the support member 30 and the wall portion 2111 can be various, such as adhesive bonding, bolting, or snap-fitting.
  • the support member 30 has a first surface 31 facing away from the wall portion 2111.
  • the first surface 31 is closer to the base plate 11 than the electrode terminal 212 and the pressure relief mechanism 213. That is, in the thickness direction X of the base plate, the first surface 31 of the support member 30 is located between the base plate 11 and the electrode terminal 212, and between the base plate 11 and the pressure relief mechanism 213. This ensures that when the base plate 11 and the first surface 31 of the support member 30 are in contact or not in contact, the electrode terminal 212 and the pressure relief mechanism 213 are spaced apart from the base plate 11 in the thickness direction X of the base plate. In other words, the electrode terminal 212 and the pressure relief mechanism 213 are both at a distance from the base plate 11 in the thickness direction X of the base plate.
  • the first surface 31 is closer to the base plate 11 in the thickness direction X of the base plate than the electrode terminal 212.
  • the first surface 31 is closer to the base plate 11 in the thickness direction X of the base plate than the pressure relief mechanism 213. If both the electrode terminal 212 and the pressure relief mechanism 213 are provided on the wall portion 2111, the first surface 31 is closer to the base plate 11 in the thickness direction X of the base plate than both the electrode terminal 212 and the pressure relief mechanism 213.
  • the housing 10 has a bottom plate 11 located at the bottom of the battery cell 21.
  • the wall portion 2111 of the outer casing 211 faces the bottom plate 11, and at least one of the electrode terminals 212 and the pressure relief mechanism 213 of the battery cell 21 is disposed on the wall portion 2111, such that at least one of the electrode terminals 212 and the pressure relief mechanism 213 is disposed on the side of the outer casing 211 facing the bottom plate 11.
  • the battery 100 with this structure can, on the one hand, provide a certain degree of support to the bottom plate 11 of the housing 10 when the battery 100 is subjected to bottom impact during bottom ball impact test or use, through the support member 30. Improving the deformation resistance of the base plate 11 under external impact helps reduce the impact or collision of the battery cell 21 caused by deformation of the base plate 11.
  • the impact force on the base plate 11 can be made to contact the support member 30 first, and the impact force on the base plate 11 can be dispersed by the support member 30, increasing the force-bearing area, thereby alleviating the phenomenon of the impact force on the base plate 11 being concentrated on the battery cell 21.
  • Figure 8 is a structural schematic diagram of the support member 30 of the battery 100 provided in some embodiments of this application.
  • the first surface 31 abuts against the base plate 11. That is, the support member 30 abuts against the base plate 11 and the wall portion 2111 on both sides in the thickness direction X of the base plate, respectively.
  • the support member 30 is structured such that its two sides in the thickness direction X of the base plate abut against the wall portion 2111 of the outer shell 211 and the base plate 11 of the housing 10, respectively.
  • the battery 100 with this structure can reduce the gap between the support member 30 and the base plate 11.
  • it can improve the utilization rate of the internal space of the battery 100, which is conducive to improving the energy density of the battery 100.
  • it can improve the support effect of the support member 30 on the base plate 11, so as to further improve the deformation resistance of the base plate 11 when subjected to external impact, thereby helping to reduce the phenomenon of impact or collision of the battery cell 21 due to deformation of the base plate 11.
  • the battery cell assembly 20 includes a plurality of battery cells 21, which are stacked along a first direction Y, perpendicular to the thickness direction X of the base plate.
  • a support member 30 extends along the first direction Y and is connected to the walls 2111 of the outer shells 211 of the plurality of battery cells 21 in the battery cell assembly 20.
  • the battery cell group 20 includes multiple battery cells 21, which are stacked along the first direction Y. That is, each battery cell group 20 is composed of multiple battery cell groups 20 stacked along the first direction Y.
  • the battery cell group 20 includes four battery cells 21 stacked along the first direction Y.
  • the battery cell group 20 may also include two, three, five or six battery cells 21 stacked along the first direction Y.
  • the support member 30 is connected to the wall portion 2111 of the outer shell 211 of the multiple battery cells 21 in the battery cell group 20. That is, the support member 30 is disposed between the multiple battery cells 21 in the battery cell group 20 and the base plate 11, and the support member 30 is connected to the wall portion 2111 of the outer shell 211 of the multiple battery cells 21 in the battery cell group 20, so that the multiple battery cells 21 in the battery cell group 20 can share a support member 30.
  • the battery cell pack 20 is provided with a plurality of battery cells 21 stacked along the first direction Y.
  • the support member 30 can support and protect the plurality of battery cells 21 in the battery cell pack 20.
  • the support member 30 can be used to support and protect the plurality of battery cells 21 in the battery cell pack 20, without the need to set a support member 30 for each battery cell 21. This can effectively reduce the manufacturing cost of the battery 100 and help reduce the assembly difficulty of the battery 100, thereby improving the assembly efficiency of the battery 100.
  • the battery 100 includes a plurality of battery cell groups 20 arranged along a second direction Z, which is perpendicular to the thickness direction X and the first direction Y of the base plate. Along the second direction Z, every two adjacent battery cell groups 20 share a support member 30, and the support member 30 is connected to the wall portion 2111 of the outer casing 211 of the battery cells 21 of the two adjacent battery cell groups 20.
  • the battery 100 includes multiple battery cell groups 20, which are arranged along the second direction Z.
  • the battery 100 contains multiple battery cells 21 arranged in a specific pattern.
  • the battery 100 includes six battery cell groups 20 arranged along the second direction Z.
  • the battery 100 may also include two, three, four, five or seven battery cell groups 20 arranged along the second direction Z.
  • every two adjacent battery cell groups 20 share a support member 30, and the support member 30 and the two adjacent battery cell groups 20
  • the walls 2111 of the outer casing 211 of each battery cell 21 are connected. That is, in Figure 5, the support member 30 disposed between two adjacent battery cell groups 20 can support and protect multiple battery cells 21 in the two adjacent battery cell groups 20.
  • the support member 30 is connected to the walls 2111 of the outer casing 211 of the battery cells 21 in the two adjacent battery cell groups 20. That is, a part of the support member 30 located between two adjacent battery cell groups 20 is used to support multiple battery cells 21 in one battery cell group 20, and the other part is used to support multiple battery cells 21 in another battery cell group 20.
  • the battery 100 with this structure can support and protect multiple battery cells 21 in the two adjacent battery cell groups 20 with a single support member 30, which helps reduce the manufacturing cost of the battery 100.
  • the support member 30 can distribute the impact force on the base plate 11 to the multiple battery cells 21 in the two adjacent battery cell groups 20, thereby further mitigating the phenomenon of the impact force on the base plate 11 being concentrated on the battery cells 21, further reducing the local force concentration on the battery cells 21, and further enhancing the protection of the electrode terminals 212 or pressure relief mechanism 213 of the battery cells 21, thereby reducing the risk of the electrode terminals 212 or pressure relief mechanism 213 of the battery cells 21 being damaged by impact.
  • a cavity 32 is formed inside the support member 30. That is, the support member 30 is a hollow structure.
  • reinforcing ribs may also be provided in the cavity 32 of the support member 30, and the reinforcing ribs are connected to the cavity wall surface of the cavity 32 to improve the structural strength of the support member 30.
  • the weight of the support member 30 can be reduced, which is beneficial to improving the energy density of the battery 100.
  • the support member 30 has the ability to collapse and absorb energy when subjected to a large impact force, which is beneficial to improving the protection effect of the support member 30 on the battery cell 21.
  • a cavity 32 is formed inside the support member 30, and the cavity 32 extends through both ends of the support member 30 along the first direction Y. That is, the cavity 32 is a structure that extends along the first direction Y, and the cavity 32 extends through the end faces of both ends of the support member 30 in the first direction Y.
  • the support member 30 is also provided with an assembly hole 33.
  • the assembly hole 33 penetrates the support member 30 along the thickness direction X of the bottom plate and communicates with the cavity 32.
  • the assembly hole 33 is used for bolt insertion so that the support member 30 can also be bolted to the housing 10.
  • the support member 30 is provided with two mounting holes 33, which are located at two ends of the support member 30 in the first direction Y, and the support member 30 is bolted to the frame 13 of the housing 10.
  • the weight of the support member 30 can be reduced and the support member 30 can be made capable of collapsing and absorbing energy when subjected to a large impact force.
  • the molding difficulty of the cavity 32 of the support member 30 can be reduced, which is beneficial to reducing the manufacturing difficulty of the support member 30.
  • the support 30 is bonded to the wall portion 2111.
  • the support member 30 can be bonded to the wall portion 2111 by adhesive, double-sided tape or hot melt adhesive.
  • an adhesive connection is used to connect the support member 30 and the wall portion 2111 of the outer shell 211. This facilitates assembly and reduces the difficulty of connecting the support member 30 and the wall portion 2111 of the outer shell 211. Furthermore, it ensures that the connection and assembly between the support member 30 and the wall portion 2111 of the outer shell 211 does not affect the battery cell 21, thus mitigating the phenomenon of the support member 30 damaging the battery cell 21.
  • the elastic modulus of the material of the support member 30 is greater than or equal to 1000 MPa.
  • the elastic modulus of the material of the support member 30 may be 1000MPa, 1010MPa, 1050MPa, 1100MPa, 1200MPa, 1300MPa, 1500MPa, 1600MPa, 1800MPa, 2000MPa, 2100MPa, 2200MPa, 2500MPa or 3000MPa, etc.
  • the support member 30 may be made of carbon fiber, epoxy resin or polyurethane resin, etc.
  • the support member 30 by setting the elastic modulus of the material of the support member 30 to be greater than or equal to 1000MPa, the support member 30 has sufficient rigidity, thereby improving the support effect of the support member 30 between the base plate 11 and the battery cell 21 when the base plate 11 is subjected to impact deformation, and also making the support member 30 have sufficient resistance to deformation, so that the support member 30 can better distribute and disperse the impact force.
  • the support member 30 is made of insulating material.
  • the support member 30 may also be made of metal, such as copper, iron, aluminum or aluminum alloy.
  • metal such as copper, iron, aluminum or aluminum alloy.
  • an insulating film needs to be wrapped on the outer surface of the support member 30 to insulate and isolate the support member 30 from the outer shell 211 of the battery cell 21.
  • the battery cell 21 will not form a circuit connection with the support member 30, thereby reducing the risk of short circuit inside the battery 100 and improving the reliability of the battery 100.
  • the pressure relief mechanism 213 is disposed on the wall portion 2111, and in a plane perpendicular to the thickness direction X of the base plate, the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the support member 30.
  • the pressure relief mechanism 213 is disposed on the wall portion 2111, that is, the pressure relief mechanism 213 is disposed on the end of the outer shell 211 of the battery cell 21 facing the base plate 11 in the thickness direction X of the base plate. In other words, the pressure relief mechanism 213 is disposed facing the base plate 11 in the thickness direction X of the base plate.
  • the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the support member 30.
  • the projection of the pressure relief mechanism 213 does not overlap with the projection of the support member 30, and the pressure relief mechanism 213 and the support member 30 do not cover each other.
  • the support member 30 does not cover or obstruct the pressure relief mechanism 213 in the thickness direction X of the base plate. This reduces the obstruction and interference of the support member 30 on the pressure relief mechanism 213, thereby improving the smoothness of the pressure relief mechanism 213 in releasing the internal pressure of the battery cell 21.
  • both the electrode terminal 212 and the pressure relief mechanism 213 are disposed on the wall portion 2111. That is, both the electrode terminal 212 and the pressure relief mechanism 213 are disposed at the end of the outer casing 211 of the battery cell 21 facing the base plate 11 in the thickness direction X of the base plate, i.e., both the electrode terminal 212 and the pressure relief mechanism 213 are disposed facing the base plate 11 in the thickness direction X of the base plate.
  • the electrode terminal 212 and the pressure relief mechanism 213 are disposed on the wall portion 2111, the electrode terminal 212 and the pressure relief mechanism 213 are located at the end of the outer shell 211 of the battery cell 21 facing the base plate 11 in the thickness direction X of the base plate, which facilitates assembly and manufacturing. Furthermore, the support member 30 can simultaneously support and protect the electrode terminal 212 and the pressure relief mechanism 213.
  • Electrode terminals 212 are disposed on the wall portion 2111.
  • the battery 100 may also include a buffer member 60, disposed between the electrode terminals 212 and the base plate 11 along the thickness direction X of the base plate, with at least a portion of the projection of the electrode terminals 212 located within the buffer member 60.
  • the buffer 60 is disposed between the electrode terminal 212 and the base plate 11. That is, the buffer 60 is disposed on the side of the electrode terminal 212 facing the base plate 11 in the thickness direction X of the base plate.
  • At least a portion of the projection of the electrode terminal 212 is located within the buffer 60, that is, the buffer 60 covers at least a portion of the electrode terminal 212 in the thickness direction X of the base plate.
  • the battery 100 is further provided with a buffer 60.
  • the buffer 60 By disposing the buffer 60 between the electrode terminal 212 and the base plate 11 in the thickness direction X of the base plate, and by covering at least a portion of the electrode terminal 212 in the thickness direction X of the base plate, the buffer 60 can absorb the impact force transmitted by the base plate 11 when the base plate 11 is deformed by impact, thereby reducing the impact force acting on the electrode terminal 212. This can buffer and protect the electrode terminal 212, further reducing the risk of the battery cell 21 being damaged by impact, which is beneficial to improving the service life and reliability of the battery 100.
  • the buffer 60 can also further increase the support effect of the base plate 11 when the base plate 11 is deformed by impact, thereby further improving the deformation resistance of the base plate 11 when subjected to external impact, which is beneficial to reducing the phenomenon of impact or collision of the battery cell 21 due to the deformation of the base plate 11.
  • the buffer 60 covers the electrode terminal 212 along the thickness direction X of the base plate. That is, the projection of the electrode terminal 212 in the thickness direction X of the base plate is entirely located within the buffer 60.
  • the projection of the electrode terminal 212 in the thickness direction X of the base plate is entirely located within the buffer 60, which helps to further enhance the buffering and protection effect of the buffer 60 on the electrode terminal 212.
  • the battery 100 may further include a busbar 40 disposed within the housing 10.
  • the busbar 40 is connected to the end of the electrode terminal 212 facing the base plate 11 to electrically connect to the battery cell 21.
  • the first surface 31 is closer to the base plate 11 than the busbar 40, and a buffer 60 is disposed between the busbar 40 and the base plate 11.
  • the busbar component 40 serves to connect the electrode terminals 212 of multiple battery cells 21 in the battery cell group 20, enabling series or parallel connection between the multiple battery cells 21.
  • the two electrode terminals 212 with opposite polarities in every two battery cells 21 are connected through a busbar component 40 to achieve series connection between the multiple battery cells 21.
  • the housing 10 of the battery 100 is also provided with an electrode output socket 50 for connection to the busbar component 40, so as to output or input electrical energy from the battery 100 through the electrode output socket 50.
  • busbar component 40 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.
  • the busbar component 40 is connected to the end of the electrode terminal 212 facing the base plate 11. That is, the busbar component 40 is located between the electrode terminal 212 and the base plate 11 in the thickness direction X of the base plate, and the busbar component 40 is connected to the electrode terminal 212.
  • the busbar component 40 is welded to the electrode terminal 212.
  • the first surface 31 is closer to the base plate 11 than the busbar component 40. That is, in the thickness direction X of the base plate, the first surface 31 of the support 30 is located between the base plate 11 and the busbar component 40, so that when the base plate 11 and the first surface 31 of the support 30 are in contact or not in contact, the busbar component 40 and the base plate 11 are both spaced apart, that is, there is a distance between the busbar component 40 and the base plate 11 in the thickness direction X of the base plate.
  • the buffer 60 is disposed between the busbar 40 and the base plate 11. That is, the buffer 60 is disposed on the side of the busbar 40 away from the electrode terminal 212 in the thickness direction X of the base plate.
  • the busbar component 40 may also be connected to the outer peripheral surface of the electrode terminal 212, so that the busbar component 40 is not located between the electrode terminal 212 and the base plate 11.
  • the buffer 60 is a structure directly disposed between the electrode terminal 212 and the base plate 11, or the buffer 60 is directly connected to the end of the electrode terminal 212 facing the base plate 11.
  • a current-combining component 40 is also provided inside the casing 10 of the battery 100.
  • the current-combining component 40 is connected to the end of the electrode terminal 212 facing the base plate 11, and a buffer 60 is disposed between the current-combining component 40 and the base plate 11. This facilitates the assembly and connection of the current-combining component 40 and the electrode terminal 212, reducing the assembly difficulty.
  • the buffer 60 also provides a certain degree of cushioning and protection for the current-combining component 40.
  • the support 30 also provides a certain degree of support and protection for the current-combining component 40.
  • the buffer 60 abuts against the busbar 40 and the base plate 11 on both sides along the thickness direction X of the base plate.
  • the gap between the buffer member 60 and the base plate 11 can be reduced.
  • this can improve the utilization rate of the internal space of the battery 100, which is beneficial to improving the energy density of the battery 100.
  • it can improve the buffering effect of the buffer member 60 on the busbar 40 and the electrode terminal 212, and further improve the supporting effect of the buffer member 60 on the base plate 11, so as to further improve the deformation resistance of the base plate 11 when subjected to external impact, thereby helping to reduce the phenomenon of impact or collision of the battery cell 21 due to deformation of the base plate 11.
  • the battery cell assembly 20 includes a plurality of battery cells 21, which are stacked along a first direction Y.
  • a busbar 40 connects the electrode terminals 212 of the plurality of battery cells 21.
  • the first direction Y is perpendicular to the thickness direction X of the base plate.
  • a buffer 60 extends along the first direction Y and along the thickness direction X of the base plate, covering the electrode terminals 212 of the plurality of battery cells 21.
  • the buffer 60 covers the electrode terminals 212 of multiple battery cells 21. That is, the buffer 60 is disposed between the electrode terminals 212 of multiple battery cells 21 in the battery cell group 20 and the base plate 11, and the buffer 60 can cover the electrode terminals 212 of multiple battery cells 21 in the thickness direction X of the base plate, so that multiple battery cells 21 in the battery cell group 20 can share a buffer 60.
  • the battery cell group 20 is provided with a plurality of battery cells 21 stacked along the first direction Y, and the busbar component 40 connects the electrode terminals 212 of the plurality of battery cells 21 to realize parallel or series connection between the plurality of battery cells 21.
  • the structure is simple and easy to implement.
  • the buffer member 60 can buffer and protect the electrode terminals 212 of the plurality of battery cells 21 in the battery cell group 20. Therefore, it is not necessary to set a buffer member 60 for each electrode terminal 212 of each battery cell 21, which helps to reduce the manufacturing cost of the battery 100 and the assembly difficulty of the battery 100, thereby improving the assembly efficiency of the battery 100.
  • the battery cell 21 includes two electrode terminals 212 with opposite polarities, namely a first electrode terminal 212 and a second electrode terminal 212.
  • the first electrode terminal 212 and the second electrode terminal 212 are spaced apart on the wall portion 2111 along a second direction Z, which is perpendicular to the thickness direction X and the first direction Y of the base plate.
  • the battery cell group 20 is correspondingly provided with two buffer members 60, which are spaced apart along the second direction Z.
  • one buffer member 60 covers the first electrode terminals 212 of multiple battery cells 21, and the other buffer member 60 covers the second electrode terminals 212 of multiple battery cells 21.
  • the battery cell group 20 is provided with two buffers 60.
  • the two buffers 60 are arranged at intervals along the second direction Z. That is, there are two buffers 60 between each battery cell group 20 and the base plate 11, and the two buffers 60 are arranged at intervals along the second direction Z.
  • one buffer 60 covers the first electrode terminal 212 of multiple battery cells 21, and another buffer 60 covers the second electrode terminal 212 of multiple battery cells 21. That is, multiple electrode terminals 212 with the same polarity in multiple battery cells 21 of the battery cell group 20 share one buffer 60. In other words, multiple electrode terminals 212 with the same polarity in multiple battery cells 21 of the battery cell group 20 are covered by one buffer 60 in the thickness direction X of the base plate.
  • each battery cell group 20 may also be provided with only one buffer 60, and the buffer 60 covers the first electrode terminal 212 and the second electrode terminal 212 of the multiple battery cells 21 of the battery cell group 20 in the thickness direction X of the base plate.
  • each battery cell 21 is provided with a first electrode terminal 212 and a second electrode terminal 212 of opposite polarity to input or output the positive and negative terminals of the battery cell 21, respectively.
  • Two buffers 60 are provided for each battery cell group 20, with one buffer 60 covering the first electrode terminals 212 of multiple battery cells 21 and the other buffer 60 covering the second electrode terminals 212 of multiple battery cells 21.
  • the two buffers 60 buffer and protect the first electrode terminals 212 and the second electrode terminals 212 of the battery cells 21, respectively.
  • the structure is simple and easy to assemble.
  • the buffer 60 is connected to the busbar 40.
  • connection structure between the buffer 60 and the busbar 40 can be various, such as adhesive bonding, bolting, or snap-fitting.
  • the buffer 60 may also be a structure connected to the base plate 11, or a structure connected to both the base plate 11 and the busbar component 40.
  • the buffer 60 may also be a structure located only between the base plate 11 and the busbar component 40, and not connected to either the busbar component 40 or the base plate 11.
  • the reliability of the buffer 60 between the base plate 11 and the busbar component 40 is improved.
  • the buffer 60 is bonded to the busbar 40.
  • the buffer 60 can be bonded to the busbar 40 with glue, double-sided tape or hot melt adhesive.
  • the buffer 60 and the busbar component 40 are connected by an adhesive connection. This facilitates assembly and reduces the difficulty of connecting the buffer 60 and the busbar component 40. Furthermore, it ensures that the connection and assembly between the buffer 60 and the busbar component 40 does not affect the busbar component 40, thus mitigating the phenomenon of the buffer 60 damaging the busbar component 40.
  • the elastic modulus of the material of the buffer 60 is greater than or equal to 3 MPa and less than or equal to 100 MPa.
  • the elastic modulus of the material of the buffer 60 can be 3MPa, 5MPa, 8MPa, 10MPa, 12MPa, 15MPa, 18MPa, 20MPa, 25MPa, 30MPa, 35MPa, 40MPa, 45MPa, 50MPa, 55MPa, 60MPa, 65MPa, 70MPa, 75MPa, 80MPa, 85MPa, 90MPa, 95MPa, or 100MPa, etc.
  • the material of the buffer 60 may be rubber, silicone or plastic, etc.
  • the elastic modulus of the material of the buffer 60 is greater than or equal to 3 MPa and less than or equal to 100 MPa.
  • the elastic modulus of the material of the buffer 60 is greater than or equal to 3 MPa, the phenomenon that the buffer 60 is too soft and therefore has a poor effect in absorbing impact force can be alleviated, and the phenomenon that the buffer 60 has a poor effect in distributing and dispersing impact force can also be alleviated.
  • the elastic modulus of the material of the buffer 60 is less than or equal to 100 MPa, the phenomenon that the buffer 60 has too high stiffness and therefore directly transmits the impact force received by the buffer 60 to the electrode terminal 212 can be alleviated, thereby improving the buffering and protection effect of the buffer 60 on the electrode terminal 212.
  • the buffer 60 is made of insulating material.
  • the electrode terminals 212 of the battery cell 21 will not form a circuit connection with the buffer 60, thereby reducing the risk of short circuit inside the battery 100 and improving the reliability of the battery 100.
  • the pressure relief mechanism 213 is disposed on the wall portion 2111, and in a plane perpendicular to the thickness direction X of the base plate, the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the buffer member 60.
  • the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the buffer 60.
  • the projection of the pressure relief mechanism 213 does not overlap with the projection of the buffer 60, and the pressure relief mechanism 213 and the buffer 60 do not cover each other.
  • the pressure relief mechanism 213 and the buffer 60 are configured such that their orthographic projections in a plane perpendicular to the thickness direction X of the base plate are not...
  • the overlap ensures that the buffer 60 does not cover or obstruct the pressure relief mechanism 213 in the thickness direction X of the base plate, thereby reducing the obstruction and interference of the buffer 60 on the pressure relief mechanism 213 and improving the smoothness of the pressure relief mechanism 213 in releasing the internal pressure of the battery cell 21.
  • the housing 10 may further include a top plate 12, which is disposed opposite to the bottom plate 11 along the thickness direction X of the bottom plate and is located on both sides of the battery cell 21.
  • the outer casing 211 is connected to the top plate 12 along the thickness direction X of the bottom plate.
  • the top of the housing 10 is a wall located above the battery cell 21 in the thickness direction X of the bottom plate, so that the top plate 12 and the bottom plate 11 are located on both sides of the battery cell 21 in the thickness direction X of the bottom plate.
  • the outer casing 211 is connected to the top plate 12, that is, the battery cell 21 is suspended inside the box 10, so that the weight of the battery cell 21 acts on the top plate 12.
  • connection structure between the outer casing 211 of the battery cell 21 and the top plate 12 of the housing 10 can be various, such as welding, bonding or bolting.
  • the shell 2112 of the outer shell 211 is connected to the top plate 12 on the bottom wall opposite to the wall portion 2111 in the thickness direction X of the bottom plate, that is, the end of the outer shell 211 away from the bottom plate 11 in the thickness direction X of the bottom plate is connected to the top plate 12.
  • the battery cell 21 is suspended inside the housing 10.
  • this reduces the load on the bottom plate 11, which is beneficial to improving the load-bearing effect of the bottom plate 11.
  • it can alleviate the phenomenon that the battery cell 21 is pressed against the bottom plate 11 by the support member 30, thereby optimizing the stress on the support member 30. In this way, when the bottom plate 11 is impacted, the support member 30 can improve the support and protection effect of the battery cell 21.
  • the housing 211 is bonded to the top plate 12.
  • the outer casing 211 can be bonded to the top plate 12 by adhesive, double-sided tape or hot melt adhesive.
  • an adhesive connection is used to connect the outer shell 211 of the battery cell 21 to the top plate 12 of the housing 10.
  • this facilitates assembly and reduces the difficulty of connecting the outer shell 211 of the battery cell 21 to the top plate 12 of the housing 10.
  • it ensures that the connection and assembly between the outer shell 211 of the battery cell 21 and the top plate 12 of the housing 10 does not affect the battery cell 21, which helps to alleviate the phenomenon of damage to the battery cell 21.
  • the housing 211 may include a housing 2112 and an end cap 2113.
  • the housing 2112 has an internal receiving cavity with an opening 2112a for receiving the electrode assembly 214.
  • the opening 2112a is located at the end of the housing 2112 facing the base plate 11 in the thickness direction X of the base plate.
  • the end cap 2113 closes the opening 2112a and is a wall portion 2111.
  • the end cap 2113 is a wall portion 2111, that is, at least one of the electrode terminal 212 or the pressure relief mechanism 213 is mounted on the end cap 2113, and the end cap 2113 is disposed facing the base plate 11 in the thickness direction X of the base plate.
  • the battery cell 21 with this structure is convenient to assemble the electrode terminal 212 or the pressure relief mechanism 213 on the end cap 2113, and can reduce the difficulty of electrically connecting the electrode terminal 212 and the electrode assembly 214, thereby reducing the manufacturing difficulty of the battery cell 21 and improving the production efficiency of the battery cell 21.
  • the structure of the battery cell 21 is not limited to this. In other embodiments, the battery cell 21 can also have other structures.
  • the housing 211 can include a shell 2112 and an end cap 2113.
  • the shell 2112 includes an integrally formed sidewall and a wall portion 2111.
  • the sidewall surrounds the wall portion 2111.
  • one end of the sidewall is connected to the wall portion 2111, and the other end forms an opening 2112a.
  • the sidewall and the wall portion 2111 together define a receiving cavity for accommodating the electrode assembly 214.
  • the end cap 2113 closes the opening 2112a.
  • At least one of the electrode terminal 212 or the pressure relief mechanism 213 is assembled on the bottom wall of the shell 2112, which is opposite to the end cap 2113 in the thickness direction X of the bottom plate, and the bottom wall of the shell 2112 faces the bottom plate 11 in the thickness direction X of the bottom plate.
  • the battery cell 21 with this structure can ensure that the area of the outer casing 211 where the electrode terminals 212 or the pressure relief mechanism 213 are provided is far away from the end cap 2113.
  • it can alleviate the phenomenon that the pulling or torsional force of other components on the electrode terminals 212 is directly applied to the end cap 2113, thereby reducing the risk of connection failure between the end cap 2113 and the casing 2112, which is beneficial to reducing the risk of leakage of the battery cell 21 during use.
  • this application also provides an electrical device, which includes a battery 100 of any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.
  • the electrical device can be any of the aforementioned devices or systems that use battery 100.
  • this application provides a battery 100, which includes a housing 10, battery cell packs 20, a support member 30, a busbar member 40, and a buffer member 60.
  • the housing 10 includes a bottom plate 11, a top plate 12, and a frame 13.
  • the frame 13 is a hollow structure with both ends open in the thickness direction X of the bottom plate.
  • the bottom plate 11 and the top plate 12 are arranged opposite to each other along the thickness direction X of the bottom plate, and the bottom plate 11 and the top plate 12 are respectively connected to the two sides of the frame 13 in the thickness direction X of the bottom plate, so that the bottom plate 11, the top plate 12, and the frame 13 together define an assembly space for accommodating the battery cell packs 20.
  • the multiple battery cell packs 20 are accommodated in the housing 10.
  • the multiple battery cell packs 20 are arranged along the second direction Z.
  • Each battery cell pack 20 includes multiple battery cells 21 stacked along the first direction Y.
  • the thickness direction X of the bottom plate, the first direction Y, and the second direction Z are perpendicular to each other.
  • the battery cell 21 includes a housing 211, electrode terminals 212, a pressure relief mechanism 213, and an electrode assembly 214.
  • the housing 211 has a wall portion 2111 and includes a shell 2112 and an end cap 2113.
  • the interior of the shell 2112 forms a receiving cavity with an opening 2112a for accommodating the electrode assembly 214.
  • the opening 2112a is located at the end of the shell 2112 facing the base plate 11 in the thickness direction X of the base plate.
  • the end cap 2113 closes the opening 2112a and is part of the wall portion 2111.
  • the wall portion 2111 faces the base plate 11, and the end of the housing 211 away from the base plate 11 is bonded to the top plate 12.
  • the electrode terminals 212 and the pressure relief mechanism 213 are both disposed on the wall portion 2111.
  • the electrode terminals 212 are electrically connected to the electrode assembly 214, and the pressure relief mechanism 213 is configured to release the internal pressure of the battery cell 21.
  • Each battery cell 21 includes two electrode terminals 212 with opposite polarities, namely a first electrode terminal 212 and a second electrode terminal 212.
  • the first electrode terminal 212 and the second electrode terminal 212 are spaced apart along a second direction Z on the wall portion 2111.
  • a busbar 40 connects the electrode terminals 212 of multiple battery cells 21 to electrically connect the multiple battery cells 21.
  • the busbar 40 is connected to the end of the electrode terminal 212 facing the base plate 11.
  • a support member 30 is disposed between the wall portion 2111 and the base plate 11 and is bonded to the wall portion 2111.
  • the support member 30 has a first surface 31 facing away from the wall portion 2111. The first surface 31 abuts against the base plate 11, and the first surface 31...
  • a surface 31 is closer to the base plate 11 than the electrode terminal 212, the pressure relief mechanism 213, and the busbar component 40.
  • the support member 30 extends along the first direction Y and is connected to the walls 2111 of the outer casings 211 of multiple battery cells 21 in the battery cell group 20.
  • each pair of adjacent battery cell groups 20 shares one support member 30, and the support member 30 is connected to the walls 2111 of the outer casings 211 of the battery cells 21 in the two adjacent battery cell groups 20.
  • the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the support member 30.
  • a cavity 32 is formed inside the support member 30, and the cavity 32 extends through both ends of the support member 30 along the first direction Y.
  • the support member 30 is made of insulating material, and the elastic modulus of the material of the support member 30 is greater than or equal to 1000 MPa.
  • Each battery cell group 20 is provided with two buffer members 60.
  • the buffer members 60 are disposed between the busbar component 40 and the base plate 11, and are bonded to the side of the busbar component 40 facing the base plate 11. Along the thickness direction X of the base plate, the two sides of the buffer members 60 abut against the busbar component 40 and the base plate 11 respectively.
  • One buffer member 60 covers the first electrode terminals 212 of multiple battery cells 21, and the other buffer member 60 covers the second electrode terminals 212 of multiple battery cells 21.
  • the orthographic projection of the pressure relief mechanism 213 does not overlap with the orthographic projection of the buffer member 60.
  • the buffer member 60 is made of insulating material, and the elastic modulus of the material of the buffer member 60 is greater than or equal to 3 MPa and less than or equal to 100 MPa.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

提供了一种电池(100)及用电装置,属于电池技术领域。其中,电池(100)包括箱体(10)、电池单体组(20)和支撑件(30)。箱体(10)包括底板(11)。电池单体组(20)容纳于箱体(10)内,电池单体组(20)包括至少一个电池单体(21),电池单体(21)包括外壳(211)、电极端子(212)和泄压机构(213),外壳(211)具有壁部(2111),沿底板(11)的厚度方向,壁部(2111)与底板(11)面向设置,电极端子(212)和泄压机构(213)均设置于外壳(211),且电极端子(212)和泄压机构(213)中的至少一者设置于壁部(2111)。支撑件(30)设置于壁部(2111)和底板(11)之间且连接于壁部(2111)。沿底板(11)的厚度方向,支撑件(30)具有背离壁部(2111)的第一表面(31),第一表面(31)相较于电极端子(212)和泄压机构(213)更靠近底板(11)。通过支撑件(30)能够对电池单体(21)的电极端子(212)或泄压机构(213)起到保护作用,以降低电池单体(21)被冲击损坏的风险,从而有利于提升电池(100)的使用寿命和使用可靠性。

Description

电池及用电装置
相关申请的交叉引用
本申请要求享有于2024年4月23日提交的名称为“电池及用电装置”的中国专利申请2024208550070的优先权,该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域,具体而言,涉及一种电池及用电装置。
背景技术
近些年,新能源汽车有了飞跃式的发展,在电动汽车领域,动力电池作为电动汽车的动力源,起着不可替代的重要作用。电池由箱体和容纳于箱体内的电池单体组成。电池作为新能源汽车核心零部件不论在使用寿命方面,还是使用可靠性上均有着较高的要求。其中,电池通常包括箱体和容纳于箱体内的多个电池单体,电池单体的外壳上设置有用于输入或输出电能的电极端子,电极端子凸出于外壳的外表面,且电池单体的外壳上还设置有用于泄放内部压力的泄压机构,但是,现有的电池在使用过程中受到冲击时极容易造成电池单体的电极端子或泄压机构被损伤,以导致电池单体出现被损坏的现象,从而使得电池的使用寿命较短,且使用可靠性较低。
发明内容
本申请实施例提供一种电池及用电装置,能够有效提升电池的使用寿命和使用可靠性。
第一方面,本申请实施例提供一种电池,包括箱体、电池单体组和支撑件;箱体包括底板;电池单体组容纳于箱体内,电池单体组包括至少一个电池单体,电池单体包括外壳、电极端子和泄压机构,外壳具有壁部,沿底板的厚度方向,壁部与底板面向设置,电极端子和泄压机构均设置于外壳,且电极端子和泄压机构中的至少一者设置于壁部;支撑件设置于壁部和底板之间且连接于壁部;其中,沿底板的厚度方向,支撑件具有背离壁部的第一表面,第一表面相较于电极端子和泄压机构更靠近底板。
在上述技术方案中,箱体具有位于电池单体的底部的底板,外壳的壁部面向底板设置,且电池单体的电极端子和泄压机构中的至少一者设置于壁部上,使得外壳面向底板的一侧设置有电极端子和泄压机构中的至少一者,通过在箱体的底板和外壳的壁部之间设置支撑件,支撑件连接于壁部上,且支撑件背离壁部的第一表面相较于电极端子和泄压机构更靠近底板,采用这种结构的电池一方面在电池进行底部球击实验或使用过程中受到底部冲击时通过支撑件能够对箱体的底板起到一定的支撑作用,以提升底板在受到外部冲击时的抗变形能力,从而有利于降低因底板出现变形而冲击或撞击电池单体的现象,另一方面在箱体的底板受到冲击或发生变形时能够使得底板受到的冲击力优先与支撑件接触,并能够通过支撑件将底板受到的冲击力进行分散,增加受力面积,以缓解底板受到的冲击力集中作用在电池单体上的现象,从而能够减少电池单体局部受力集中的情况,以提升对电池单体的电极端子或泄压机构的保护作用,进而能够有效降低电池单体的电极端子或泄压机构被冲击损坏的风险,且能够降低电池单体出现泄漏或起火爆炸等风险,有利于提升电池的使用寿命和使用可靠性。
在一些实施例中,沿底板的厚度方向,第一表面抵接于底板。
在上述技术方案中,通过将第一表面抵接于底板上,使得支撑件为在底板的厚度方向上的两侧分别抵接于外壳的壁部和箱体的底板的结构,采用这种结构的电池能够减少支撑件与底板之间的间隙大小,一方面能够提升电池的内部空间利用率,有利于提高电池的能量密度,另一方面能够提升支撑件对底板的支撑效果,以进一步提升底板在受到外部冲击时的抗变形能力,从而有利于降低因底板出现变形而冲击或撞击电池单体的现象。
在一些实施例中,电池单体组包括多个电池单体,多个电池单体沿第一方向层叠设置,第一方向垂直于底板的厚度方向;其中,支撑件沿第一方向延伸,且支撑件与电池单体组中的多个电池单体的外壳的壁部均相连。
在上述技术方案中,电池单体组设置有沿第一方向层叠设置的多个电池单体,通过将支撑件设置为沿第一方向延伸的结构,且支撑件与电池单体组的多个电池单体的壁部均相连,使得支撑件能够对电池单体组中的多个电池单体起到支撑和保护作用,从而在提升电池的电容量的同时能够通过一个支撑件便实现对电池单体组的多个电池单体进行支撑和保护,无需每个电池单体对应设置一个支撑件,进而能够有效降低电池的制造成本,且有利于降低电池的装配难度,以提升电池的装配效率。
在一些实施例中,电池包括多个电池单体组,多个电池单体组沿第二方向排布,第二方向垂直于底板的厚度方向和第一方向;其中,沿第二方向,每相邻的两个电池单体组共用一个支撑件,支撑件与相邻的两个电池单体组的电池单体的外壳的壁部均相连。
在上述技术方案中,通过在第二方向上每相邻的两个电池单体组之间共用一个支撑件,且支撑件与相邻的两个电池单体组中的多个电池单体的壁部均相连,采用这种结构的电池一方面能够通过一个支撑件便实现对相邻的两个电池单体组的多个电池单体进行支撑和保护,有利于降低电池的制造成本,另一方面使得支撑件能够将底板受到的冲击力分摊到相邻的两个电池单体组的多个电池单体上,从而能够进一步缓解底板受到的冲击力集中作用在电池单体上的现象,以进一步减少电池单体局部受力集中的情况,进而能够进一步提升对电池单体的电极端子或泄压机构的保护作用,以降低电池单体的电极端子或泄压机构被冲击损坏的风险。
在一些实施例中,支撑件的内部形成有空腔,且空腔沿第一方向贯穿支撑件的两端。
在上述技术方案中,通过在支撑件的内部设置空腔,且将空腔设置为沿第一方向贯穿支撑件的两端的结构,从而在实现减轻支撑件的重量以及实现支撑件在受到较大的冲击力时具备溃缩吸能的能力的同时还能够降低支 撑件的空腔的成型难度,有利于降低支撑件的制造难度。
在一些实施例中,支撑件的内部形成有空腔。
在上述技术方案中,通过在支撑件的内部设置空腔,一方面能够减轻支撑件的重量,有利于提升电池的能量密度,另一方面使得支撑件在受到较大的冲击力时具备溃缩吸能的能力,有利于提升支撑件对电池单体的保护效果。
在一些实施例中,支撑件与壁部粘接连接。
在上述技术方案中,采用粘接连接的结构连接支撑件与外壳的壁部,一方面便于装配,有利于降低支撑件与外壳的壁部之间的连接难度,另一方面能够实现支撑件与外壳的壁部之间的连接装配不影响电池单体,有利于缓解支撑件损坏电池单体的现象。
在一些实施例中,支撑件的材质的弹性模量大于或等于1000MPa。
在上述技术方案中,通过将支撑件的材料的弹性模量设置为大于或等于1000MPa,使得支撑件具有足够的刚度,从而在底板受到冲击变形时能够提升支撑件在底板和电池单体之间的支撑效果,且使得支撑件具有足够的抗变形能力,以便于支撑件较好地将受到的冲击力进行分摊和分散。
在一些实施例中,支撑件为绝缘材质。
在上述技术方案中,通过将支撑件设置为绝缘材质,使得电池单体不会与支撑件形成电路连通,从而能够降低电池内部出现短接的风险,有利于提升电池的使用可靠性。
在一些实施例中,泄压机构设置于壁部;其中,在垂直于底板的厚度方向的平面内,泄压机构的正投影与支撑件的正投影不重叠。
在上述技术方案中,通过将泄压机构和支撑件设置为在垂直于底板的厚度方向的平面内的正投影不重叠,使得支撑件在底板的厚度方向上未覆盖或遮挡泄压机构,从而能够减少支撑件对泄压机构的阻挡和干涉影响,以提升泄压机构在泄放电池单体的内部压力时的顺畅度。
在一些实施例中,电极端子和泄压机构均设置于壁部。
在上述技术方案中,通过将电极端子和泄压机构均设置于壁部上,使得电极端子和泄压机构均位于电池单体的外壳在底板的厚度方向上面向底板的一端,从而便于装配和制造,且通过支撑件能够同时对电极端子和泄压机构起到支撑和保护作用。
在一些实施例中,电极端子设置于壁部;其中,电池还包括缓冲件,沿底板的厚度方向,缓冲件设置于电极端子和底板之间,且电极端子的投影的至少部分位于缓冲件内。
在上述技术方案中,电池还设置有缓冲件,通过将缓冲件在底板的厚度方向上设置于电极端子和底板之间,且缓冲件在底板的厚度方向上覆盖电极端子的至少部分,一方面使得缓冲件在底板受到冲击发生变形时能够吸收底板传递的冲击力,以减小作用到电极端子上的冲击力,从而能够对电极端子起到缓冲和保护作用,以进一步降低电池单体被冲击损坏的风险,有利于提升电池的使用寿命和使用可靠性,另一方面通过缓冲件还能够在底板受到冲击变形时进一步增加对底板的支撑效果,以进一步提升底板在受到外部冲击时的抗变形能力,从而有利于降低因底板出现变形而冲击或撞击电池单体的现象。
在一些实施例中,沿底板的厚度方向,缓冲件覆盖电极端子。
在上述技术方案中,通过将缓冲件设置为在底板的厚度方向上覆盖电极端子的结构,使得电极端子在底板的厚度方向上的投影整体均位于缓冲件内,从而有利于进一步提升缓冲件对电极端子的缓冲和保护作用。
在一些实施例中,电池还包括汇流部件;汇流部件设置于箱体内,沿底板的厚度方向,汇流部件连接于电极端子面向底板的一端,以电连接电池单体;其中,沿底板的厚度方向,第一表面相较于汇流部件更靠近底板,缓冲件设置于汇流部件与底板之间。
在上述技术方案中,电池的箱体内还设置有汇流部件,通过将汇流部件与电极端子相连,以实现电池单体的电能的输入或输出,其中,通过将汇流部件连接于电极端子面向底板的一端,且将缓冲件设置于汇流部件与底板之间,一方面便于汇流部件与电极端子装配连接,有利于降低汇流部件与电极端子之间的装配难度,另一方面使得缓冲件还能够对汇流部件起到一定的缓冲和保护作用。此外,通过将第一表面设置为相较于汇流部件更靠近底板,使得支撑件还能够对汇流部件起到一定的支撑和保护作用。
在一些实施例中,沿底板的厚度方向,缓冲件的两侧分别抵接于汇流部件和底板。
在上述技术方案中,通过将缓冲件在底板的厚度方向上的两侧设置为分别抵接于汇流部件和底板,从而能够减少缓冲件与底板之间的间隙大小,一方面能够提升电池的内部空间利用率,有利于提高电池的能量密度,另一方面能够提升缓冲件对汇流部件和电极端子的缓冲作用,且能够进一步提升缓冲件对底板的支撑效果,以进一步提升底板在受到外部冲击时的抗变形能力,从而有利于降低因底板出现变形而冲击或撞击电池单体的现象。
在一些实施例中,电池单体组包括多个电池单体,多个电池单体沿第一方向层叠设置,汇流部件连接多个电池单体的电极端子,第一方向垂直于底板的厚度方向;其中,缓冲件沿第一方向延伸,沿底板的厚度方向,缓冲件覆盖多个电池单体的电极端子。
在上述技术方案中,电池单体组设置有沿第一方向层叠设置的多个电池单体,且汇流部件连接多个电池单体的电极端子,以实现多个电池单体之间的并联或串联,结构简单,且便于实现。其中,通过将缓冲件设置为沿第一方向延伸的结构,且缓冲件在底板的厚度方向上覆盖多个电池单体的电极端子,使得缓冲件能够对电池单体组中的多个电池单体的电极端子起到缓冲和保护作用,从而无需每个电池单体的电极端子对应设置一个缓冲件,有利于降低电池的制造成本,且有利于降低电池的装配难度,以提升电池的装配效率。
在一些实施例中,电池单体包括极性相反的两个电极端子,两个电极端子分别为第一电极端子和第二电极端子,第一电极端子和第二电极端子沿第二方向间隔设置于壁部上,第二方向垂直于底板的厚度方向和第一方 向;其中,电池单体组对应设置有两个缓冲件,两个缓冲件沿第二方向间隔排布,沿底板的厚度方向,一个缓冲件覆盖多个电池单体的第一电极端子,另一个缓冲件覆盖多个电池单体的第二电极端子。
在上述技术方案中,每个电池单体设置有极性相反的第一电极端子和第二电极端子,以分别输入或输出电池单体的正负极,通过对应每个电池单体组设置两个缓冲件,且一个缓冲件覆盖多个电池单体的第一电极端子,另一个缓冲件覆盖多个电池单体的第二电极端子,以通过两个缓冲件分别对电池单体的第一电极端子和第二电极端子进行缓冲和保护,结构简单,且便于装配。
在一些实施例中,缓冲件连接于汇流部件。
在上述技术方案中,通过将缓冲件连接于汇流部件上,以提升缓冲件设置于底板和汇流部件之间的牢靠性,一方面便于将缓冲件装配于底板和汇流部件之间,能够实现先将缓冲件、汇流部件和电池单体组装配成一个整体后再装配至箱体内,有利于降低缓冲件的装配难度,且有利于提高电池的装配效率,另一方面能够减少缓冲件从底板和汇流部件之间脱落的现象,以提升电池的使用稳定性。
在一些实施例中,缓冲件与汇流部件粘接连接。
在上述技术方案中,采用粘接连接的结构连接缓冲件与汇流部件,一方面便于装配,有利于降低缓冲件与汇流部件之间的连接难度,另一方面能够实现缓冲件与汇流部件之间的连接装配不影响汇流部件,有利于缓解缓冲件损坏汇流部件的现象。
在一些实施例中,缓冲件的材质的弹性模量大于或等于3MPa且小于或等于100MPa。
在上述技术方案中,缓冲件的材质的弹性模量为大于或等于3MPa且小于或等于100MPa,一方面通过将缓冲件的材料的弹性模量设置为大于或等于3MPa,以缓解缓冲件太软而导致缓冲件吸收冲击力的效果不佳的现象,且能够缓冲件分摊和分散冲击力的效果不佳的现象,另一方面通过将缓冲件的材料的弹性模量设置为小于或等于100MPa,以缓解缓冲件的刚度太大而出现缓冲件将受到的冲击力直接传递至电极端子上的现象,从而有利于提升缓冲件对电极端子的缓冲和保护效果。
在一些实施例中,缓冲件为绝缘材质。
在上述技术方案中,通过将缓冲件设置为绝缘材质,使得电池单体的电极端子不会与缓冲件形成电路连通,从而能够降低电池内部出现短接的风险,有利于提升电池的使用可靠性。
在一些实施例中,泄压机构设置于壁部;其中,在垂直于底板的厚度方向的平面内,泄压机构的正投影与缓冲件的正投影不重叠。
在上述技术方案中,通过将泄压机构和缓冲件设置为在垂直于底板的厚度方向的平面内的正投影不重叠,使得缓冲件在底板的厚度方向上未覆盖或遮挡泄压机构,从而能够减少缓冲件对泄压机构的阻挡和干涉影响,以提升泄压机构在泄放电池单体的内部压力时的顺畅度。
在一些实施例中,箱体还包括顶板;顶板与底板沿底板的厚度方向相对设置且分别位于电池单体的两侧;其中,沿底板的厚度方向,外壳连接于顶板。
在上述技术方案中,通过将电池单体的外壳连接于箱体的顶板上,以实现电池单体为吊挂于箱体内的结构,一方面能够减少底板受到的承载力,有利于提升底板的承载效果,另一方面能够缓解电池单体通过支撑件压紧于底板上的现象,从而能够优化支撑件的受力情况,进而在底板受到冲击时能够提升支撑件对电池单体的支撑和保护效果。
在一些实施例中,外壳与顶板粘接连接。
在上述技术方案中,采用粘接连接的结构连接电池单体的外壳与箱体的顶板,一方面便于装配,有利于降低电池单体的外壳与箱体的顶板之间的连接难度,另一方面能够实现电池单体的外壳与箱体的顶板之间的连接装配不影响电池单体,有利于缓解电池单体被损坏的现象。
在一些实施例中,外壳包括壳体和端盖;壳体的内部形成具有开口的容纳腔,容纳腔用于容纳电极组件,开口位于壳体在底板的厚度方向上面向底板的一端;端盖封闭开口;其中,端盖为壁部。
在上述技术方案中,通过将外壳的壁部设置为外壳用于封闭开口的端盖,采用这种结构的电池单体便于在端盖上装配电极端子或泄压机构,且能够降低电极端子与电极组件相互电连接的难度,从而有利于降低电池单体的制造难度,以提升电池单体的生产效率。
在一些实施例中,外壳包括壳体和端盖;壳体包括一体成型的侧壁和壁部,侧壁围设于壁部的周围,沿底板的厚度方向,侧壁的一端连接于壁部,另一端围合形成开口,侧壁和壁部共同界定出用于容纳电极组件的容纳腔;端盖封闭开口。
在上述技术方案中,通过将外壳的壁部设置为壳体在壁部的厚度方向上与端盖相对设置的底壁,采用这种结构的电池单体能够实现外壳设置有电极端子或泄压机构的区域远离端盖,一方面能够缓解其他部件对电极端子进行拉扯或扭转的作用力直接作用在端盖上的现象,以降低端盖与壳体出现连接失效的风险,有利于降低电池单体在使用过程中出现漏液等风险,另一方面能够缓解端盖和壳体相互连接产生的应力作用在泄压机构上的现象,以减少泄压机构出现损坏或提前致动开阀的现象,进而有利于提升电池单体的使用寿命和使用可靠性。
第二方面,本申请实施例还提供一种用电装置,包括上述的电池,电池用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,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他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图;
图2为本申请一些实施例提供的电池的结构爆炸图;
图3为本申请一些实施例提供的电池(去除底板后)的结构示意图;
图4为本申请一些实施例提供的电池的剖视图;
图5为图4所示的电池的A处的局部放大图;
图6为本申请一些实施例提供的电池单体的结构示意图;
图7为本申请一些实施例提供的电池单体的结构爆炸图;
图8为本申请一些实施例提供的电池的支撑件的结构示意图;
图9为图4所示的电池的B处的局部放大图。
图标:1000-车辆;100-电池;10-箱体;11-底板;12-顶板;13-框体;20-电池单体组;21-电池单体;211-外壳;2111-壁部;2112-壳体;2112a-开口;2113-端盖;212-电极端子;213-泄压机构;214-电极组件;2141-极耳;215-集流构件;30-支撑件;31-第一表面;32-空腔;33-装配孔;40-汇流部件;50-电极输出座;60-缓冲件;200-控制器;300-马达;X-底板的厚度方向;Y-第一方向;Z-第二方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
除非另有定义,本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同;本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本申请;本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形,意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“附接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。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在本申请中的具体含义。
本申请中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本申请中字符“/”,一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中,相同的附图标记表示相同的部件,并且为了简洁,在不同实施例中,省略对相同部件的详细说明。应理解,附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸,以及集成装置的整体厚度、长宽等尺寸仅为示例性说明,而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请实施例中,电池单体可以为二次电池,二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。
电池单体可以为锂离子电池、钠离子电池、钠锂离子电池、锂金属电池、钠金属电池、锂硫电池、镁离子电池、镍氢电池、镍镉电池、铅蓄电池等,本申请实施例对此并不限定。
电池单体一般包括电极组件。电极组件包括正极、负极以及隔离件。在电池单体充放电过程中,活性离子(例如锂离子)在正极和负极之间往返嵌入和脱出。隔离件设置在正极和负极之间,可以起到防止正负极短路的作用,同时可以使活性离子通过。
在一些实施例中,正极可以为正极片,正极片可以包括正极集流体以及设置在正极集流体至少一个表面的正极活性材料。
作为示例,正极集流体具有在其自身厚度方向相对的两个表面,正极活性材料设置在正极集流体相对的两个表面的任意一者或两者上。
作为示例,正极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、碳、镍或钛等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铝、铝合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,正极活性材料可包括以下材料中的至少一种:含锂磷酸盐、锂过渡金属氧化物及其各自的改性化合物。但本申请并不限定于这些材料,还可以使用其他可被用作电池正极活性材料的传统材料。这些正极活性材料可以仅单独使用一种,也可以将两种以上组合使用。其中,含锂磷酸盐的示例可包括但不限于磷酸铁锂(如LiFePO4(也可以简称为LFP))、磷酸铁锂与碳的复合材料、磷酸锰锂(如LiMnPO4)、磷酸锰锂与碳的复合材料、磷酸锰铁锂、磷酸锰铁锂与碳的复合材料中的至少一种。锂过渡金属氧化物的示例可包括但不限于锂钴氧化物(如LiCoO2)、锂镍氧化物(如LiNiO2)、锂锰氧化物(如LiMnO2、LiMn2O4)、锂镍钴氧化物、锂锰钴氧化物、锂镍锰氧化物、锂镍钴锰氧化物(如LiNi1/3Co1/3Mn1/3O2(也可以简称为NCM333)、LiNi0.5Co0.2Mn0.3O2(也可以简称为 NCM523)、LiNi0.5Co0.25Mn0.25O2(也可以简称为NCM211)、LiNi0.6Co0.2Mn0.2O2(也可以简称为NCM622)、LiNi0.8Co0.1Mn0.1O2(也可以简称为NCM811)、锂镍钴铝氧化物(如LiNi0.85Co0.15Al0.05O2)及其改性化合物等中的至少一种。
在一些实施例中,正极可以采用泡沫金属。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金等。泡沫金属作为正极时,泡沫金属表面可以不设置正极活性材料,当然也可以设置正极活性材料。作为示例,在泡沫金属内还可以填充或/和沉积有锂源材料、钾金属或钠金属,锂源材料为锂金属和/或富锂材料。
在一些实施例中,负极可以为负极片,负极片可以包括负极集流体。
作为示例,负极集流体可采用金属箔片、泡沫金属或复合集流体。例如,作为金属箔片,可以采用银表面处理的铝或不锈钢、不锈钢、铜、铝、镍、炭精电极、镍或钛等。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铜、铜合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,负极片可以包括负极集流体以及设置在负极集流体至少一个表面上的负极活性材料。
作为示例,负极集流体具有在其自身厚度方向相对的两个表面,负极活性材料设置在负极集流体相对的两个表面中的任意一者或两者上。
作为示例,负极活性材料可采用本领域公知的用于电池单体的负极活性材料。作为示例,负极活性材料可包括以下材料中的至少一种:人造石墨、天然石墨、软炭、硬炭、硅基材料、锡基材料和钛酸锂等。硅基材料可选自单质硅、硅氧化合物、硅碳复合物、硅氮复合物以及硅合金中的至少一种。锡基材料可选自单质锡、锡氧化合物以及锡合金中的至少一种。但本申请并不限定于这些材料,还可以使用其他可被用作电池负极活性材料的传统材料。这些负极活性材料可以仅单独使用一种,也可以将两种以上组合使用。
在一些实施例中,正极集流体的材料可以为铝,负极集流体的材料可以为铜。
在一些实施方式中,电极组件还包括隔离件,隔离件设置在正极和负极之间。
在一些实施方式中,隔离件为隔离膜。隔离膜的种类可以是多种,可以选用任意公知的具有良好的化学稳定性和机械稳定性的多孔结构隔离膜。
作为示例,隔离膜的材质可以包括玻璃纤维、无纺布、聚乙烯、聚丙烯及聚偏二氟乙烯中的至少一种。隔离膜可以是单层薄膜,也可以是多层复合薄膜。在隔离膜为多层复合薄膜时,各层的材料可以相同或不同。隔离件可以是单独的一个部件位于正负极之间,也可以附着在正负极的表面。
在一些实施方式中,隔离件为固态电解质。固态电解质设于正极和负极之间,同时起到传输离子和隔离正负极的作用。
在一些实施方式中,电池单体还包括电解质,电解质在正、负极之间起到传导离子的作用。电解质可以是液态的、凝胶态的或固态的。其中,液态电解质包括电解质盐和溶剂。
在一些实施方式中,电解质盐可以包括六氟磷酸锂、四氟硼酸锂、高氯酸锂、六氟砷酸锂、双氟磺酰亚胺锂、双三氟甲磺酰亚胺锂、三氟甲磺酸锂、二氟磷酸锂、二氟草酸硼酸锂、二草酸硼酸锂、二氟二草酸磷酸锂及四氟草酸磷酸锂中的至少一种。
在一些实施方式中,溶剂可以包括碳酸亚乙酯、碳酸亚丙酯、碳酸甲乙酯、碳酸二乙酯、碳酸二甲酯、碳酸二丙酯、碳酸甲丙酯、碳酸乙丙酯、碳酸亚丁酯、氟代碳酸亚乙酯、甲酸甲酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、丙酸甲酯、丙酸乙酯、丙酸丙酯、丁酸甲酯、丁酸乙酯、1,4-丁内酯、环丁砜、二甲砜、甲乙砜及二乙砜中的至少一种。溶剂也可选醚类溶剂。醚类溶剂可以包括乙二醇二甲醚、乙二醇二乙醚、二乙二醇二甲醚、三乙二醇二甲醚、四乙二醇二甲醚、1,3-二氧戊环、四氢呋喃、甲基四氢呋喃、二苯醚及冠醚中的一种或多种。
其中,凝胶态电解质包括以聚合物作为电解质的骨架网络,搭配离子液体-锂盐。
其中,固态电解质包括聚合物固态电解质、无机固态电解质、复合固态电解质。
作为示例,聚合物固态电解质可以为聚醚(聚氧化乙烯)、聚硅氧烷、聚碳酸酯、聚丙烯腈、聚偏氟乙烯、聚甲基丙烯酸甲酯、单离子聚合物、聚离子液体-锂盐、纤维素等。
作为示例,无机固态电解质可以包括氧化物固体电解质(晶态的钙钛矿、钠超导离子导体、石榴石、非晶态的LiPON薄膜)、硫化物固体电解质(晶态的锂超离子导体(锂锗磷硫、硫银锗矿)、非晶体硫化物)以及卤化物固体电解质、氮化物固体电解质及氢化物固体电解质中的一种或多种。
作为示例,复合固态电解质通过在聚合物固体电解质中增加无机固态电解质填料形成。
在一些实施方式中,电极组件为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中,电极组件为叠片结构。
作为示例,正极片、负极片可分别设置多个,多个正极片和多个负极片交替层叠设置。
作为示例,正极片可设置多个,负极片折叠形成多个层叠设置的折叠段,相邻的折叠段之间夹持一个正极片。
作为示例,正极片和负极片均折叠形成多个层叠设置的折叠段。
作为示例,隔离件可设置多个,分别设置在任意相邻的正极片或负极片之间。
作为示例,隔离件可连续地设置,通过折叠或者卷绕方式设置在任意相邻的正极片或负极片之间。
在一些实施方式中,电极组件的形状可以为圆柱状,扁平状或多棱柱状等。
在一些实施方式中,电极组件设有极耳,极耳可以将电流从电极组件导出。极耳包括正极耳和负极耳。
在一些实施方式中,电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。外壳可以为钢壳、铝壳、塑料壳(如聚丙烯)、复合金属壳(如铜铝复合外壳)或铝塑膜等。
作为示例,电池单体可以为圆柱形电池单体、棱柱电池单体、软包电池单体或其它形状的电池单体,棱 柱电池单体包括但不限于方壳电池单体、刀片形电池单体、多棱柱电池,多棱柱电池例如为六棱柱电池等。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点,是现今新能源发展的重要组成部分。电池技术的发展要同时考虑多方面的设计因素,例如,能量密度、循环寿命、放电容量、充放电倍率等性能参数,另外,还需要考虑电池的安全性。
对于一般的电池而言,电池通常包括箱体和容纳于箱体内的多个电池单体,电池单体包括外壳和设置于外壳上的电极端子,通过汇流部件连接多个电池单体的电极端子能够实现电池内的多个电池单体之间的串联或并联,其中,电池单体的外壳上还设置有泄压机构,泄压机构用于泄放电池单体的内部压力,以降低电池单体因热失控引发的爆炸风险,然而,由于电池的使用工况较为复杂,常常受到外部环境的冲击,使得箱体在受到外部冲击发生变形后极容易挤压、磕碰或将冲击力直接传递至电池单体上的现象,且极容易对电池单体的外壳上的泄压机构以及凸设的电极端子造成冲击和磕碰,特别是在电池单体倒置放置于箱体内的结构中,即电池单体的电极端子和泄压机构均位于电池单体的底部,使得在电池的底部受到冲击或进行底部球击实验时极容易对电池单体的电极端子和泄压机构造成损伤,以导致电池单体出现损坏或漏液等风险,甚至在使用过程中出现起火爆炸等风险,从而不利于提升电池的使用寿命和使用可靠性。
基于以上考虑,为了解决电池的使用寿命较短且使用可靠性较低的问题,本申请实施例提供了一种电池,电池包括箱体、电池单体组和支撑件。箱体包括底板。电池单体组容纳于箱体内,电池单体组包括至少一个电池单体,电池单体包括外壳、电极端子和泄压机构,外壳具有壁部,沿底板的厚度方向,壁部与底板面向设置,电极端子和泄压机构均设置于外壳,且电极端子和泄压机构中的至少一者设置于壁部。支撑件设置于壁部和底板之间且连接于壁部。沿底板的厚度方向,支撑件具有背离壁部的第一表面,第一表面相较于电极端子和泄压机构更靠近底板。
在这种结构的电池中,箱体具有位于电池单体的底部的底板,外壳的壁部面向底板设置,且电池单体的电极端子和泄压机构中的至少一者设置于壁部上,使得外壳面向底板的一侧设置有电极端子和泄压机构中的至少一者,通过在箱体的底板和外壳的壁部之间设置支撑件,支撑件连接于壁部上,且支撑件背离壁部的第一表面相较于电极端子和泄压机构更靠近底板,采用这种结构的电池一方面在电池进行底部球击实验或使用过程中受到底部冲击时通过支撑件能够对箱体的底板起到一定的支撑作用,以提升底板在受到外部冲击时的抗变形能力,从而有利于降低因底板出现变形而冲击或撞击电池单体的现象,另一方面在箱体的底板受到冲击或发生变形时能够使得底板受到的冲击力优先与支撑件接触,并能够通过支撑件将底板受到的冲击力进行分散,增加受力面积,以缓解底板受到的冲击力集中作用在电池单体上的现象,从而能够减少电池单体局部受力集中的情况,以提升对电池单体的电极端子或泄压机构的保护作用,进而能够有效降低电池单体的电极端子或泄压机构被冲击损坏的风险,且能够降低电池单体出现泄漏或起火爆炸等风险,有利于提升电池的使用寿命和使用可靠性。
本申请实施例公开的电池可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池等组成该用电装置的电源系统,这样,有利于缓解电池的电池单体在使用过程中因受到冲击而出现损坏的问题,以提升电池的使用寿命和使用可靠性。
本申请实施例提供一种使用电池作为电源的用电装置,用电装置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为例进行说明。
请参照图1,图1为本申请一些实施例提供的车辆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,也可以设置在车辆1000的头部,还可以设置在车辆1000的尾部。电池100可以用于车辆1000的进行供电,例如,电池100可以作为车辆1000的操作电源或使用电源等。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。
在本申请一些实施例中,电池100不仅可以作为车辆1000的操作电源或使用电源,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。
根据本申请的一些实施例,参照图2、图3、图4和图5,图2为本申请一些实施例提供的电池100的结构爆炸图,图3为本申请一些实施例提供的电池100(去除底板11后)的结构示意图,图4为本申请一些实施例提供的电池100的剖视图,图5为图4所示的电池100的A处的局部放大图,图6为本申请一些实施例提供的电池单体21的结构示意图。本申请提供了一种电池100,电池100包括箱体10、电池单体组20和支撑件30。箱体10包括底板11。电池单体组20容纳于箱体10内,电池单体组20包括至少一个电池单体21,电池单体21包括外壳 211、电极端子212和泄压机构213,外壳211具有壁部2111,沿底板的厚度方向X,壁部2111与底板11面向设置,电极端子212和泄压机构213均设置于外壳211,且电极端子212和泄压机构213中的至少一者设置于壁部2111。支撑件30设置于壁部2111和底板11之间且连接于壁部2111。沿底板的厚度方向X,支撑件30具有背离壁部2111的第一表面31,第一表面31相较于电极端子212和泄压机构213更靠近底板11。
其中,箱体10用于为电池单体21提供装配空间,箱体10可以采用多种结构。在图2中,箱体10包括底板11、顶板12和框体13,框体13为在底板的厚度方向X上的两端均开放的中空结构,即框体13为环绕于电池单体组20的外侧的环形结构,底板11和顶板12沿底板的厚度方向X相对设置,且底板11和顶板12分别连接于框体13在底板的厚度方向X上的两侧,以使底板11、顶板12和框体13共同限定出用于容纳电池单体21的装配空间。
沿底板的厚度方向X,底板11起到能够为电池单体组20或电池100内的其他部件起到支撑的作用,也就是说,底板的厚度方向X为重力方向或近似重力方向,且底板11在底板的厚度方向X上位于电池单体21的底部,对应地,顶板12位于电池单体21的顶部。
示例性地,底板11、顶板12和框体13为分体设置且相连的结构,以便于将电池单体21等部件装配于箱体10内。
可选地,底板11可以通过粘接、焊接连接或螺栓螺接等结构连接于框体13在底板的厚度方向X上的一侧,同样地,顶板12也可以通过粘接、焊接连接或螺栓螺接等结构连接于框体13在底板的厚度方向X上远离底板11的一侧上。
需要说明的是,在一些实施例中,箱体10的结构还可以是多种,比如,可以是底板11与框体13为一体成型的结构,对应地,顶板12与框体13为分体设置的结构,当然,还可以是顶板12与框体13为一体成型的结构,对应地,底板11与框体13为分体设置的结构。
当然,箱体10也可以是多种形状,比如,圆柱体、长方体或正方体等。示例性地,在图2和图3中,箱体10的形状为长方体。箱体10的高度方向为底板的厚度方向X,箱体10的宽度方向为第一方向Y,箱体10的长度方向为第二方向Z,底板的厚度方向X、第一方向Y和第二方向Z两两垂直。
可选地,在电池100中,容纳于箱体10内的电池单体组20可以是一个,也可以是多个。当设置于箱体10内的电池单体组20为多个时,多个电池单体组20之间可以是串联或并联或混联,混联是指多个电池单体组20中既有串联又有并联。
示例性地,在图2和图3中,电池100可以包括多个电池单体组20,多个电池单体组20沿第二方向Z排布。
同样地,电池单体组20包括至少一个电池单体21,也就是说,每个电池单体组20中的电池单体21可以是一个,也可以是多个。当电池单体组20包括多个电池单体21时,多个电池单体21之间可以是串联或并联或混联等结构。
示例性地,在图2和图3中,电池100包括沿第二方向Z排布的多个电池单体组20,且每个电池单体组20包括沿第一方向Y层叠设置的多个电池单体21,以使多个电池单体21呈排列结构装配于箱体10内。示例性地,第一方向Y为电池单体21的厚度方向,使得电池单体组20中的多个电池单体21为沿电池单体21的厚度方向层叠设置的结构。
在一些实施例中,参见图2和图3所示,电池100还可以包括汇流部件40,汇流部件40用于电连接电池单体组20中的多个电池单体21,以实现电池单体组20中的多个电池单体21之间的串联或并联,且汇流部件40还用于电连接相邻的两个电池单体组20,以实现相邻的两个电池单体组20之间的串联或并联,其中,汇流部件40与电池单体21的电极端子212相连。
在一些实施例中,参见图2和图3所示,电池100还可以包括电极输出座50,电极输出座50安装于箱体10内,电极输出座50与汇流部件40相连,以输出或输入电池100的电能。
可选地,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,但并不局限于此。电池单体21可以呈长方体、圆柱体、棱柱体或其它形状等。示例性地,在图6中,电池单体21为长方体结构。对应地,底板的厚度方向X也为电池单体21的高度方向,第一方向Y也为电池单体21的厚度方向,第二方向Z也为电池单体21的长度方向。
在本申请实施例中,外壳211还可以用于容纳电解质,例如电解液。外壳211可以是多种结构形式。外壳211的材质也可以是多种,比如,铜、铁、铝、钢、铝合金等。
其中,参照图6,并请进一步参照图7,图7为本申请一些实施例提供的电池单体21的结构爆炸图。电池单体21还包括电极组件214,电极组件214容纳于外壳211内,且电极组件214与电极端子212电连接,以实现电池单体21的电能的输入或输出。外壳211可以包括壳体2112和端盖2113,壳体2112的内部形成有容纳腔,且容纳腔一端形成有开口2112a,即壳体2112为一端开放的空心结构,端盖2113盖合于壳体2112的开口2112a处并形成密封连接,以形成用于容纳电极组件214和电解质的密封空间。
可选地,设置电极端子212或泄压机构213的壁部2111可以是端盖2113,也可以是壳体2112的多个壁中的一个壁。示例性地,参见图6和图7所示,壁部2111也可以为外壳211的端盖2113,对应地,开口2112a位于壳体2112在底板的厚度方向X上面向箱体10的底板11的一端,使得底板的厚度方向X为壁部2111的厚度方向,也为端盖2113的厚度方向。当然,在其他实施例中,壁部2111也可以是壳体2112在底板的厚度方向X上与端盖2113相对设置的底壁,对应地,底板的厚度方向X则为端盖2113与壁部2111的排布方向,同样地,壁部2111还可以为壳体2112与端盖2113相邻且相互抵接的侧壁。
沿底板的厚度方向X,壁部2111与底板11面向设置,即电池单体21的外壳211在底板的厚度方向X上 面向底板11的一端的壁为壁部2111。
在组装电池单体21时,可先将电极组件214放入壳体2112内,并向壳体2112内填充电解质,再将端盖2113盖合于壳体2112的开口2112a,以封闭壳体2112的开口2112a。
壳体2112可以是多种形状,比如,圆柱体、长方体等。壳体2112的形状可根据电极组件214的具体形状来确定。比如,若电极组件214为圆柱体结构,则壳体2112可选用圆柱体结构;若电极组件214为长方体结构,则壳体2112可选用长方体结构。当然,端盖2113也可以是多种结构,比如,端盖2113为板状结构或一端开放的空心结构等。示例性地,在图6和图7中,壳体2112为长方体结构。
可理解地,外壳211并不仅仅局限于上述结构,外壳211也可以是其他结构,比如,外壳211包括壳体2112和两个端盖2113,壳体2112为相对的两侧开口2112a的空心结构,一个端盖2113对应盖合于壳体2112的一个开口2112a处并形成密封连接,以形成用于容纳电极组件214和电解质的密封空间。
电极组件214是电池单体21中发生电化学反应的部件,电极组件214的结构可以是多种,比如,电极组件214可以是由正极片、隔离件和负极片通过卷绕形成的卷绕式结构,也可以是由正极片、隔离件和负极片通过层叠布置形成的层叠式结构。
示例性地,隔离件为隔离膜,隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯以及聚偏二氟乙烯中的至少一种。
其中,电极组件214的一端形成有极耳2141,极耳2141用于输入或输出电极组件214的正极或负极,极耳2141用于与电极端子212相连,以实现电极组件214与电极端子212之间的电连接。需要说明的是,电极组件214的极耳2141为正极片上未涂覆正极活性物质层的区域相互层叠连接形成的部件或负极片上未涂覆负极活性物质层的区域相互层叠连接形成的部件。若极耳2141用于输出电极组件214的正极,则极耳2141为正极片上未涂覆正极活性物质层的区域相互层叠连接形成的部件;若极耳2141用于输出电极组件214的负极,则极耳2141为负极片上未涂覆负极活性物质层的区域相互层叠连接形成的部件。
可选地,容纳于外壳211内的电极组件214可以是一个,也可以是多个。示例性地,在图7中,电池单体21的外壳211设置有两个电极组件214,两个电极组件214沿第一方向Y层叠设置,也就是说,两个电极组件214沿电池单体21的厚度方向层叠设置,当然,在其他实施例中,容纳于外壳211内的电极组件214可以是一个、三个、四个、五个、六个、七个或八个等。
在本申请实施例中,电极端子212起到输出或输入电池单体21的电能的作用,电极端子212绝缘安装于外壳211上且凸出于外壳211的外表面,即电极端子212与外壳211之间未形成电连接。
示例性地,在图5和图6中,电极端子212绝缘安装于壁部2111上且凸出于壁部2111在底板的厚度方向X上面向底板11的一侧,即电极端子212与壁部2111之间未形成电连接,且电极端子212从壁部2111面向底板11的一侧的表面沿底板的厚度方向X往靠近底板11的方向凸出。同样地,电极端子212的材质也可以是多种,比如,电极端子212的材质可以是铜、铁、铝、钢、铝合金等。
可选地,电极端子212可以是与电极组件214的极耳2141直接连接,比如,焊接或抵接等,也可以是通过其他部件与电极组件214的极耳2141间接连接。
在一些实施例中,参见图7所示,电池单体21还可以包括集流构件215,集流构件215设置于外壳211内,集流构件215连接电极端子212和电极组件214的极耳2141,以实现电极组件214与电极端子212之间的电连接。
示例性地,集流构件215与电极端子212焊接连接,且集流构件215与电极组件214的极耳2141焊接连接。当然,在其他实施例中,集流构件215也可以是与电极端子212相互抵接等结构,同样地,集流构件215也可以是与电极组件214的极耳2141相互抵接等结构。
在图6和图7中,电池单体21包括两个电极端子212和两个集流构件215,两个电极端子212沿第二方向Z间隔设置于壁部2111上,且两个集流构件215沿第二方向Z间隔设置于外壳211内,对应地,每个电极组件214具有两个极耳2141,两个极耳2141沿第二方向Z间隔设置,且两个极耳2141的极性相反,两个电极端子212分别通过两个集流构件215与电极组件214的两个极耳2141电连接,以实现电池单体21的正极和负极的输入或输出,也就是说,两个电极端子212分别用于输出或输入电池单体21的正极和负极,对应地,两个极耳2141分别为电极组件214的正极耳和负极耳。
在本申请实施例中,泄压机构213起到在电池单体21的内部压力或温度达到预定值时泄放电池单体21内部的压力的作用。
电极端子212和泄压机构213中的至少一者设置于壁部2111,即可以是电极端子212和泄压机构213中的仅一者设置于壁部2111上,也可以是两者均设置于壁部2111上。示例性地,在图5和图6中,泄压机构213也设置于壁部2111上,也就是说,电极端子212和泄压机构213均设置于壁部2111上,在图7中,壁部2111为端盖2113,对应地,电极端子212和泄压机构213均设置于外壳211的端盖2113上。
需要说明的是,在其他实施例中,也可以是仅电极端子212设置于壁部2111上,而泄压机构213设置于外壳211的其他壁上,当然,还可以是仅泄压机构213设置于壁部2111上,而电极端子212设置于外壳211的其他壁上。
可选地,泄压机构213与外壳211可以是一体成型的结构,也可以是分体设置的结构。若泄压机构213与外壳211为分体式结构,则泄压机构213可以通过焊接等方式连接于外壳211上,对应地,泄压机构213可以是诸如防爆阀、防爆片、气阀、泄压阀或安全阀等泄压部件;若泄压机构213与外壳211为一体成型的结构,则泄压机构213为外壳211上形成有薄弱结构的区域,比如,外壳211上设置有刻痕槽的区域。
在本申请实施例中,支撑件30在底板的厚度方向X上设置于箱体10的底板11和电池单体21的外壳 211的壁部2111之间,且支撑件30与壁部2111相连,以在箱体10的底板11和电池单体21的外壳211的壁部2111之间起到支撑作用。支撑件30的材质可以是多种,支撑件30可以是绝缘材质,比如,碳纤维、环氧树脂、聚氨酯树脂、塑胶或陶瓷等,当然,支撑件30也可以是金属材质,比如,铜、铁、铝、钢、铝合金等。需要说明的是,在支撑件30为金属材质时,需要在支撑件30的外表面上包覆绝缘膜,以使支撑件30与电池单体21以及箱体10等其他部件绝缘隔离。
可选地,支撑件30与壁部2111之间的连接结构可以是多种,比如,粘接、螺栓螺接或卡接等。
沿底板的厚度方向X,支撑件30具有背离壁部2111的第一表面31,第一表面31相较于电极端子212和泄压机构213更靠近底板11,也就是说,在底板的厚度方向X上,支撑件30的第一表面31位于底板11和电极端子212之间,且位于底板11和泄压机构213之间,使得在底板11与支撑件30的第一表面31相互接触或未接触时,电极端子212和泄压机构213在底板的厚度方向X上与底板11均为间隔设置的结构,即电极端子212和泄压机构213均与底板11在底板的厚度方向X上存在距离。
需要说明的是,在仅电极端子212设置于壁部2111上时,则为第一表面31相较于电极端子212在底板的厚度方向X上更靠近底板11,在仅泄压机构213设置于壁部2111上时,则为第一表面31相较于泄压机构213在底板的厚度方向X上更靠近底板11,若在电极端子212和泄压机构213均设置于壁部2111上时,则为第一表面31相较于电极端子212和泄压机构213在底板的厚度方向X上更靠近底板11。
在本实施例中,箱体10具有位于电池单体21的底部的底板11,外壳211的壁部2111面向底板11设置,且电池单体21的电极端子212和泄压机构213中的至少一者设置于壁部2111上,使得外壳211面向底板11的一侧设置有电极端子212和泄压机构213中的至少一者,通过在箱体10的底板11和外壳211的壁部2111之间设置支撑件30,支撑件30连接于壁部2111上,且支撑件30背离壁部2111的第一表面31相较于电极端子212和泄压机构213更靠近底板11,采用这种结构的电池100一方面在电池100进行底部球击实验或使用过程中受到底部冲击时通过支撑件30能够对箱体10的底板11起到一定的支撑作用,以提升底板11在受到外部冲击时的抗变形能力,从而有利于降低因底板11出现变形而冲击或撞击电池单体21的现象,另一方面在箱体10的底板11受到冲击或发生变形时能够使得底板11受到的冲击力优先与支撑件30接触,并能够通过支撑件30将底板11受到的冲击力进行分散,增加受力面积,以缓解底板11受到的冲击力集中作用在电池单体21上的现象,从而能够减少电池单体21局部受力集中的情况,以提升对电池单体21的电极端子212或泄压机构213的保护作用,进而能够有效降低电池单体21的电极端子212或泄压机构213被冲击损坏的风险,且能够降低电池单体21出现泄漏或起火爆炸等风险,有利于提升电池100的使用寿命和使用可靠性。
根据本申请的一些实施例,参照图4和图5,并请进一步参照图8,图8为本申请一些实施例提供的电池100的支撑件30的结构示意图。沿底板的厚度方向X,第一表面31抵接于底板11。也就是说,支撑件30在底板的厚度方向X上的两侧分别抵接于底板11和壁部2111。
在本实施例中,通过将第一表面31抵接于底板11上,使得支撑件30为在底板的厚度方向X上的两侧分别抵接于外壳211的壁部2111和箱体10的底板11的结构,采用这种结构的电池100能够减少支撑件30与底板11之间的间隙大小,一方面能够提升电池100的内部空间利用率,有利于提高电池100的能量密度,另一方面能够提升支撑件30对底板11的支撑效果,以进一步提升底板11在受到外部冲击时的抗变形能力,从而有利于降低因底板11出现变形而冲击或撞击电池单体21的现象。
根据本申请的一些实施例,参见图2、图3和图5所示,电池单体组20包括多个电池单体21,多个电池单体21沿第一方向Y层叠设置,第一方向Y垂直于底板的厚度方向X。支撑件30沿第一方向Y延伸,且支撑件30与电池单体组20中的多个电池单体21的外壳211的壁部2111均相连。
其中,电池单体组20包括多个电池单体21,多个电池单体21沿第一方向Y层叠设置,也就是说,每个电池单体组20由沿第一方向Y层叠排布的多个电池单体组20成。
示例性地,在图2和图3中,电池单体组20包括沿第一方向Y层叠设置的四个电池单体21,当然,在其他实施例中,电池单体组20也可以是包括沿第一方向Y层叠设置的两个、三个、五个或六个等电池单体21。
支撑件30与电池单体组20中的多个电池单体21的外壳211的壁部2111均相连,也就是说,支撑件30设置于电池单体组20中的多个电池单体21与底板11之间,且支撑件30连接于电池单体组20中的多个电池单体21的外壳211的壁部2111,使得电池单体组20的多个电池单体21能够共用一个支撑件30。
在本实施例中,电池单体组20设置有沿第一方向Y层叠设置的多个电池单体21,通过将支撑件30设置为沿第一方向Y延伸的结构,且支撑件30与电池单体组20的多个电池单体21的壁部2111均相连,使得支撑件30能够对电池单体组20中的多个电池单体21起到支撑和保护作用,从而在提升电池100的电容量的同时能够通过一个支撑件30便实现对电池单体组20的多个电池单体21进行支撑和保护,无需每个电池单体21对应设置一个支撑件30,进而能够有效降低电池100的制造成本,且有利于降低电池100的装配难度,以提升电池100的装配效率。
在一些实施例中,参见图2、图3、图4和图5所示,电池100包括多个电池单体组20,多个电池单体组20沿第二方向Z排布,第二方向Z垂直于底板的厚度方向X和第一方向Y。沿第二方向Z,每相邻的两个电池单体组20共用一个支撑件30,支撑件30与相邻的两个电池单体组20的电池单体21的外壳211的壁部2111均相连。
其中,电池100包括多个电池单体组20,多个电池单体组20沿第二方向Z排布,也就是说,电池100内设置有呈排列方式布置的多个电池单体21。
示例性地,在图2和图3中,电池100包括沿第二方向Z排布的六个电池单体组20,当然,在其他实施例中,电池100也可以是包括沿第二方向Z排布的两个、三个、四个、五个或七个等电池单体组20。
沿第二方向Z,每相邻的两个电池单体组20共用一个支撑件30,支撑件30与相邻的两个电池单体组20 的电池单体21的外壳211的壁部2111均相连,也就是说,在图5中,设置于相邻的两个电池单体组20之间的支撑件30能够对相邻的两个电池单体组20中的多个电池单体21进行支撑和保护,且支撑件30连接于相邻的两个电池单体组20的电池单体21的外壳211的壁部2111,即位于相邻的两个电池单体组20之间的支撑件30的一部分用于支撑一个电池单体组20中的多个电池单体21,另一部用于支撑另一个电池单体组20中的多个电池单体21。
在本实施例中,通过在第二方向Z上每相邻的两个电池单体组20之间共用一个支撑件30,且支撑件30与相邻的两个电池单体组20中的多个电池单体21的壁部2111均相连,采用这种结构的电池100一方面能够通过一个支撑件30便实现对相邻的两个电池单体组20的多个电池单体21进行支撑和保护,有利于降低电池100的制造成本,另一方面使得支撑件30能够将底板11受到的冲击力分摊到相邻的两个电池单体组20的多个电池单体21上,从而能够进一步缓解底板11受到的冲击力集中作用在电池单体21上的现象,以进一步减少电池单体21局部受力集中的情况,进而能够进一步提升对电池单体21的电极端子212或泄压机构213的保护作用,以降低电池单体21的电极端子212或泄压机构213被冲击损坏的风险。
根据本申请的一些实施例,参见图2、图5和图8所示,支撑件30的内部形成有空腔32。也就是说,支撑件30为中空结构。
需要说明的是,在其他实施例中,支撑件30的空腔32内还可以设置加强筋,且加强筋与空腔32的腔壁面相连,以提升支撑件30的结构强度。
在本实施例中,通过在支撑件30的内部设置空腔32,一方面能够减轻支撑件30的重量,有利于提升电池100的能量密度,另一方面使得支撑件30在受到较大的冲击力时具备溃缩吸能的能力,有利于提升支撑件30对电池单体21的保护效果。
在一些实施例中,参见图2和图8所示,支撑件30的内部形成有空腔32,且空腔32沿第一方向Y贯穿支撑件30的两端。也就是说,空腔32为沿第一方向Y延伸的结构,且空腔32贯穿支撑件30在第一方向Y上的两端的端面。
可选地,参见图2和图8所示,支撑件30上还设置有装配孔33,装配孔33沿底板的厚度方向X贯穿支撑件30,且装配孔33与空腔32连通,装配孔33用于供螺栓插入,以使支撑件30还能够通过螺栓螺接于箱体10上。
示例性地,支撑件30上设置有两个装配孔33,两个装配孔33分别位于支撑件30在第一方向Y上的两个端部,且支撑件30通过螺栓螺接于箱体10的框体13上。
在本实施例中,通过在支撑件30的内部设置空腔32,且将空腔32设置为沿第一方向Y贯穿支撑件30的两端的结构,从而在实现减轻支撑件30的重量以及实现支撑件30在受到较大的冲击力时具备溃缩吸能的能力的同时还能够降低支撑件30的空腔32的成型难度,有利于降低支撑件30的制造难度。
根据本申请的一些实施例,支撑件30与壁部2111粘接连接。
示例性地,支撑件30可以通过胶水、双面胶或热熔胶等粘接于壁部2111上。
在本实施例中,采用粘接连接的结构连接支撑件30与外壳211的壁部2111,一方面便于装配,有利于降低支撑件30与外壳211的壁部2111之间的连接难度,另一方面能够实现支撑件30与外壳211的壁部2111之间的连接装配不影响电池单体21,有利于缓解支撑件30损坏电池单体21的现象。
根据本申请的一些实施例,支撑件30的材质的弹性模量大于或等于1000MPa。
示例性地,支撑件30的材质的弹性模量可以是1000MPa、1010MPa、1050MPa、1100MPa、1200MPa、1300MPa、1500MPa、1600MPa、1800MPa、2000MPa、2100MPa、2200MPa、2500MPa或3000MPa等。
示例性地,支撑件30的材质可以是碳纤维、环氧树脂或聚氨酯树脂等。
在本实施例中,通过将支撑件30的材料的弹性模量设置为大于或等于1000MPa,使得支撑件30具有足够的刚度,从而在底板11受到冲击变形时能够提升支撑件30在底板11和电池单体21之间的支撑效果,且使得支撑件30具有足够的抗变形能力,以便于支撑件30较好地将受到的冲击力进行分摊和分散。
根据本申请的一些实施例,支撑件30为绝缘材质。
需要说明的是,在其他实施例中,支撑件30也可以是金属材质等,比如,铜、铁、铝或铝合金等,当支撑件30为金属材质时,需要在支撑件30的外表面上包覆绝缘膜,以绝缘隔离支撑件30和电池单体21的外壳211。
在本实施例中,通过将支撑件30设置为绝缘材质,使得电池单体21不会与支撑件30形成电路连通,从而能够降低电池100内部出现短接的风险,有利于提升电池100的使用可靠性。
根据本申请的一些实施例,参见图3、图5和图6所示,泄压机构213设置于壁部2111,在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与支撑件30的正投影不重叠。
其中,泄压机构213设置于壁部2111,即泄压机构213设置于电池单体21的外壳211在底板的厚度方向X上面向底板11的一端,也就是说,泄压机构213在底板的厚度方向X上面向底板11设置。
在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与支撑件30的正投影不重叠,也就是说,在底板的厚度方向X上,泄压机构213的投影与支撑件30的投影不重叠,泄压机构213和支撑件30未相互覆盖。
在本实施例中,通过将泄压机构213和支撑件30设置为在垂直于底板的厚度方向X的平面内的正投影不重叠,使得支撑件30在底板的厚度方向X上未覆盖或遮挡泄压机构213,从而能够减少支撑件30对泄压机构213的阻挡和干涉影响,以提升泄压机构213在泄放电池单体21的内部压力时的顺畅度。
根据本申请的一些实施例,参见图5和图6所示,电极端子212和泄压机构213均设置于壁部2111。也就是说,电极端子212和泄压机构213均设置于电池单体21的外壳211在底板的厚度方向X上面向底板11的一端,即电极端子212和泄压机构213在底板的厚度方向X上均面向底板11设置。
在本实施例中,通过将电极端子212和泄压机构213均设置于壁部2111上,使得电极端子212和泄压机构213均位于电池单体21的外壳211在底板的厚度方向X上面向底板11的一端,从而便于装配和制造,且通过支撑件30能够同时对电极端子212和泄压机构213起到支撑和保护作用。
根据本申请的一些实施例,参照图2、图3和图6,并请进一步参照图9,图9为图4所示的电池100的B处的局部放大图。电极端子212设置于壁部2111,电池100还可以包括缓冲件60,沿底板的厚度方向X,缓冲件60设置于电极端子212和底板11之间,且电极端子212的投影的至少部分位于缓冲件60内。
其中,沿底板的厚度方向X,缓冲件60设置于电极端子212和底板11之间,也就是说,缓冲件60设置于电极端子212在底板的厚度方向X上面向底板11的一侧。
电极端子212的投影的至少部分位于缓冲件60内,即缓冲件60在底板的厚度方向X上覆盖电极端子212的至少一部分。
在本实施例中,电池100还设置有缓冲件60,通过将缓冲件60在底板的厚度方向X上设置于电极端子212和底板11之间,且缓冲件60在底板的厚度方向X上覆盖电极端子212的至少部分,一方面使得缓冲件60在底板11受到冲击发生变形时能够吸收底板11传递的冲击力,以减小作用到电极端子212上的冲击力,从而能够对电极端子212起到缓冲和保护作用,以进一步降低电池单体21被冲击损坏的风险,有利于提升电池100的使用寿命和使用可靠性,另一方面通过缓冲件60还能够在底板11受到冲击变形时进一步增加对底板11的支撑效果,以进一步提升底板11在受到外部冲击时的抗变形能力,从而有利于降低因底板11出现变形而冲击或撞击电池单体21的现象。
在一些实施例中,参见图3和图9所示,沿底板的厚度方向X,缓冲件60覆盖电极端子212。也就是说,电极端子212在底板的厚度方向X上的投影整体均位于缓冲件60内。
在本实施例中,通过将缓冲件60设置为在底板的厚度方向X上覆盖电极端子212的结构,使得电极端子212在底板的厚度方向X上的投影整体均位于缓冲件60内,从而有利于进一步提升缓冲件60对电极端子212的缓冲和保护作用。
根据本申请的一些实施例,参见图2和图9所示,电池100还可以包括汇流部件40,汇流部件40设置于箱体10内,沿底板的厚度方向X,汇流部件40连接于电极端子212面向底板11的一端,以电连接电池单体21。沿底板的厚度方向X,第一表面31相较于汇流部件40更靠近底板11,缓冲件60设置于汇流部件40与底板11之间。
其中,汇流部件40起到连接电池单体组20中的多个电池单体21的电极端子212的作用,以实现多个电池单体21之间的串联或并联,示例性地,在图2中,每两个电池单体21中极性相反的两个电极端子212通过一个汇流部件40连接,以实现多个电池单体21之间的串联。对应地,电池100的箱体10内还设置有用于与汇流部件40相连的电极输出座50,以通过电极输出座50输出或输入电池100的电能。
可选地,汇流部件40的材质可以是多种,比如,铜、铁、铝、钢、铝合金等。
沿底板的厚度方向X,汇流部件40连接于电极端子212面向底板11的一端,也就是说,汇流部件40在底板的厚度方向X上位于电极端子212和底板11之间,且汇流部件40与电极端子212相连,示例性地,汇流部件40与电极端子212焊接连接。
沿底板的厚度方向X,第一表面31相较于汇流部件40更靠近底板11,也就是说,在底板的厚度方向X上,支撑件30的第一表面31位于底板11和汇流部件40之间,使得在底板11与支撑件30的第一表面31相互接触或未接触时,汇流部件40与底板11均为间隔设置的结构,即汇流部件40与底板11在底板的厚度方向X上存在距离。
沿底板的厚度方向X,缓冲件60设置于汇流部件40与底板11之间,也就是说,缓冲件60在底板的厚度方向X上设置于汇流部件40背离电极端子212的一侧。
需要说明的是,在其他实施例中,汇流部件40也可以是连接于电极端子212的外周面上,使得汇流部件40未位于电极端子212和底板11之间,在这种实施例中,则缓冲件60为直接设置于电极端子212和底板11之间的结构,或缓冲件60直接连接于电极端子212面向底板11的一端上。
在本实施例中,电池100的箱体10内还设置有汇流部件40,通过将汇流部件40与电极端子212相连,以实现电池单体21的电能的输入或输出,其中,通过将汇流部件40连接于电极端子212面向底板11的一端,且将缓冲件60设置于汇流部件40与底板11之间,一方面便于汇流部件40与电极端子212装配连接,有利于降低汇流部件40与电极端子212之间的装配难度,另一方面使得缓冲件60还能够对汇流部件40起到一定的缓冲和保护作用。此外,通过将第一表面31设置为相较于汇流部件40更靠近底板11,使得支撑件30还能够对汇流部件40起到一定的支撑和保护作用。
在一些实施例中,参见图9所示,沿底板的厚度方向X,缓冲件60的两侧分别抵接于汇流部件40和底板11。
在本实施例中,通过将缓冲件60在底板的厚度方向X上的两侧设置为分别抵接于汇流部件40和底板11,从而能够减少缓冲件60与底板11之间的间隙大小,一方面能够提升电池100的内部空间利用率,有利于提高电池100的能量密度,另一方面能够提升缓冲件60对汇流部件40和电极端子212的缓冲作用,且能够进一步提升缓冲件60对底板11的支撑效果,以进一步提升底板11在受到外部冲击时的抗变形能力,从而有利于降低因底板11出现变形而冲击或撞击电池单体21的现象。
根据本申请的一些实施例,参见图2、图3和图4所示,电池单体组20包括多个电池单体21,多个电池单体21沿第一方向Y层叠设置,汇流部件40连接多个电池单体21的电极端子212,第一方向Y垂直于底板的厚度方向X。缓冲件60沿第一方向Y延伸,沿底板的厚度方向X,缓冲件60覆盖多个电池单体21的电极端子212。
其中,沿底板的厚度方向X,缓冲件60覆盖多个电池单体21的电极端子212,也就是说,缓冲件60设置于电池单体组20中的多个电池单体21的电极端子212与底板11之间,且缓冲件60能够在底板的厚度方向X上覆盖多个电池单体21的电极端子212,使得电池单体组20的多个电池单体21能够共用一个缓冲件60。
在本实施例中,电池单体组20设置有沿第一方向Y层叠设置的多个电池单体21,且汇流部件40连接多个电池单体21的电极端子212,以实现多个电池单体21之间的并联或串联,结构简单,且便于实现。其中,通过将缓冲件60设置为沿第一方向Y延伸的结构,且缓冲件60在底板的厚度方向X上覆盖多个电池单体21的电极端子212,使得缓冲件60能够对电池单体组20中的多个电池单体21的电极端子212起到缓冲和保护作用,从而无需每个电池单体21的电极端子212对应设置一个缓冲件60,有利于降低电池100的制造成本,且有利于降低电池100的装配难度,以提升电池100的装配效率。
在一些实施例中,参见图3、图4、图5和图6所示,电池单体21包括极性相反的两个电极端子212,两个电极端子212分别为第一电极端子212和第二电极端子212,第一电极端子212和第二电极端子212沿第二方向Z间隔设置于壁部2111上,第二方向Z垂直于底板的厚度方向X和第一方向Y。电池单体组20对应设置有两个缓冲件60,两个缓冲件60沿第二方向Z间隔排布,沿底板的厚度方向X,一个缓冲件60覆盖多个电池单体21的第一电极端子212,另一个缓冲件60覆盖多个电池单体21的第二电极端子212。
其中,电池单体组20对应设置有两个缓冲件60,两个缓冲件60沿第二方向Z间隔排布,即每个电池单体组20与底板11之间设置有两个缓冲件60,且两个缓冲件60为沿第二方向Z间隔设置的结构。
沿底板的厚度方向X,一个缓冲件60覆盖多个电池单体21的第一电极端子212,另一个缓冲件60覆盖多个电池单体21的第二电极端子212,也就是说,电池单体组20的多个电池单体21中极性相同的多个电极端子212共用一个缓冲件60,即电池单体组20的多个电池单体21中极性相同的多个电极端子212在底板的厚度方向X上被一个缓冲件60覆盖。
需要说明的是,在其他实施例中,每个电池单体组20也可以仅对应设置一个缓冲件60,一个缓冲件60在底板的厚度方向X上覆盖电池单体组20的多个电池单体21的第一电极端子212和第二电极端子212。
在本实施例中,每个电池单体21设置有极性相反的第一电极端子212和第二电极端子212,以分别输入或输出电池单体21的正负极,通过对应每个电池单体组20设置两个缓冲件60,且一个缓冲件60覆盖多个电池单体21的第一电极端子212,另一个缓冲件60覆盖多个电池单体21的第二电极端子212,以通过两个缓冲件60分别对电池单体21的第一电极端子212和第二电极端子212进行缓冲和保护,结构简单,且便于装配。
根据本申请的一些实施例,参见图9所示,缓冲件60连接于汇流部件40。
可选地,缓冲件60与汇流部件40之间的连接结构可以是多种,比如,粘接、螺栓螺接或卡接等。
需要说明的是,在其他实施例中,缓冲件60也可以是连接于底板11上的结构,还可以是与底板11和汇流部件40均相连的结构,当然,缓冲件60也可以是仅位于底板11和汇流部件40之间,且与汇流部件40和底板11均没有连接的结构。
在本实施例中,通过将缓冲件60连接于汇流部件40上,以提升缓冲件60设置于底板11和汇流部件40之间的牢靠性,一方面便于将缓冲件60装配于底板11和汇流部件40之间,能够实现先将缓冲件60、汇流部件40和电池单体组20装配成一个整体后再装配至箱体10内,有利于降低缓冲件60的装配难度,且有利于提高电池100的装配效率,另一方面能够减少缓冲件60从底板11和汇流部件40之间脱落的现象,以提升电池100的使用稳定性。
在一些实施例中,缓冲件60与汇流部件40粘接连接。
示例性地,缓冲件60可以通过胶水、双面胶或热熔胶等粘接于汇流部件40上。
在本实施例中,采用粘接连接的结构连接缓冲件60与汇流部件40,一方面便于装配,有利于降低缓冲件60与汇流部件40之间的连接难度,另一方面能够实现缓冲件60与汇流部件40之间的连接装配不影响汇流部件40,有利于缓解缓冲件60损坏汇流部件40的现象。
根据本申请的一些实施例,缓冲件60的材质的弹性模量大于或等于3MPa且小于或等于100MPa。
示例性地,缓冲件60的材质的弹性模量可以是3MPa、5MPa、8MPa、10MPa、12MPa、15MPa、18MPa、20MPa、25MPa、30MPa、35MPa、40MPa、45MPa、50MPa、55MPa、60MPa、65MPa、70MPa、75MPa、80MPa、85MPa、90MPa、95MPa或100MPa等。
示例性地,缓冲件60的材质可以是橡胶、硅胶或塑胶等。
在本实施例中,缓冲件60的材质的弹性模量为大于或等于3MPa且小于或等于100MPa,一方面通过将缓冲件60的材料的弹性模量设置为大于或等于3MPa,以缓解缓冲件60太软而导致缓冲件60吸收冲击力的效果不佳的现象,且能够缓冲件60分摊和分散冲击力的效果不佳的现象,另一方面通过将缓冲件60的材料的弹性模量设置为小于或等于100MPa,以缓解缓冲件60的刚度太大而出现缓冲件60将受到的冲击力直接传递至电极端子212上的现象,从而有利于提升缓冲件60对电极端子212的缓冲和保护效果。
根据本申请的一些实施例,缓冲件60为绝缘材质。
在本实施例中,通过将缓冲件60设置为绝缘材质,使得电池单体21的电极端子212不会与缓冲件60形成电路连通,从而能够降低电池100内部出现短接的风险,有利于提升电池100的使用可靠性。
根据本申请的一些实施例,参见图3和图5所示,泄压机构213设置于壁部2111,在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与缓冲件60的正投影不重叠。
其中,在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与缓冲件60的正投影不重叠,在底板的厚度方向X上,泄压机构213的投影与缓冲件60的投影不重叠,泄压机构213和缓冲件60未相互覆盖。
在本实施例中,通过将泄压机构213和缓冲件60设置为在垂直于底板的厚度方向X的平面内的正投影不 重叠,使得缓冲件60在底板的厚度方向X上未覆盖或遮挡泄压机构213,从而能够减少缓冲件60对泄压机构213的阻挡和干涉影响,以提升泄压机构213在泄放电池单体21的内部压力时的顺畅度。
根据本申请的一些实施例,参见图2、图4和图5所示,箱体10还可以包括顶板12,顶板12与底板11沿底板的厚度方向X相对设置且分别位于电池单体21的两侧。沿底板的厚度方向X,外壳211连接于顶板12。
其中,箱体10的顶部为箱体10在底板的厚度方向X上位于电池单体21的上方的一个壁,以使顶板12与底板11在底板的厚度方向X上分别位于电池单体21的两侧。
外壳211连接于顶板12,即电池单体21吊挂于箱体10内,使得电池单体21的重力作用于顶板12上。
可选地,电池单体21的外壳211与箱体10的顶板12之间的连接结构可以是多种,比如,焊接连接、粘接或螺栓螺接等。
示例性地,在图5中,外壳211的壳体2112在底板的厚度方向X上与壁部2111相对设置的底壁连接于顶板12上,即外壳211在底板的厚度方向X上远离底板11的一端连接于顶板12。
在本实施例中,通过将电池单体21的外壳211连接于箱体10的顶板12上,以实现电池单体21为吊挂于箱体10内的结构,一方面能够减少底板11受到的承载力,有利于提升底板11的承载效果,另一方面能够缓解电池单体21通过支撑件30压紧于底板11上的现象,从而能够优化支撑件30的受力情况,进而在底板11受到冲击时能够提升支撑件30对电池单体21的支撑和保护效果。
在一些实施例中,外壳211与顶板12粘接连接。
示例性地,外壳211可以通过胶水、双面胶或热熔胶等粘接于顶板12上。
在本实施例中,采用粘接连接的结构连接电池单体21的外壳211与箱体10的顶板12,一方面便于装配,有利于降低电池单体21的外壳211与箱体10的顶板12之间的连接难度,另一方面能够实现电池单体21的外壳211与箱体10的顶板12之间的连接装配不影响电池单体21,有利于缓解电池单体21被损坏的现象。
根据本申请的一些实施例,参见图5、图6和图7所示,外壳211可以包括壳体2112和端盖2113。壳体2112的内部形成具有开口2112a的容纳腔,容纳腔用于容纳电极组件214,开口2112a位于壳体2112在底板的厚度方向X上面向底板11的一端。端盖2113封闭开口2112a,端盖2113为壁部2111。
其中,端盖2113为壁部2111,即电极端子212或泄压机构213中的至少一者装配于端盖2113上,且端盖2113在底板的厚度方向X上与底板11面向设置。
在本实施例中,通过将外壳211的壁部2111设置为外壳211用于封闭开口2112a的端盖2113,采用这种结构的电池单体21便于在端盖2113上装配电极端子212或泄压机构213,且能够降低电极端子212与电极组件214相互电连接的难度,从而有利于降低电池单体21的制造难度,以提升电池单体21的生产效率。
需要说明的是,电池单体21的结构并不局限于此,在其他实施例中,电池单体21还可以是其他结构,比如,外壳211可以包括壳体2112和端盖2113,壳体2112包括一体成型的侧壁和壁部2111,侧壁围设于壁部2111的周围,沿底板的厚度方向X,侧壁的一端连接于壁部2111,另一端围合形成开口2112a,侧壁和壁部2111共同界定出用于容纳电极组件214的容纳腔,端盖2113封闭开口2112a。也就是说,电极端子212或泄压机构213中的至少一者装配于壳体2112在底板的厚度方向X上与端盖2113相对设置的底壁上,且壳体2112的底壁在底板的厚度方向X上与底板11面向设置。
在本实施例中,通过将外壳211的壁部2111设置为壳体2112在壁部2111的厚度方向上与端盖2113相对设置的底壁,采用这种结构的电池单体21能够实现外壳211设置有电极端子212或泄压机构213的区域远离端盖2113,一方面能够缓解其他部件对电极端子212进行拉扯或扭转的作用力直接作用在端盖2113上的现象,以降低端盖2113与壳体2112出现连接失效的风险,有利于降低电池单体21在使用过程中出现漏液等风险,另一方面能够缓解端盖2113和壳体2112相互连接产生的应力作用在泄压机构213上的现象,以减少泄压机构213出现损坏或提前致动开阀的现象,进而有利于提升电池单体21的使用寿命和使用可靠性。
根据本申请的一些实施例,本申请还提供了一种用电装置,用电装置包括以上任一方案的电池100,并且电池100用于为用电装置提供电能。
其中,用电装置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,参见图2至图9所示,本申请提供了一种电池100,电池100包括箱体10、电池单体组20、支撑件30、汇流部件40和缓冲件60。箱体10包括底板11、顶板12和框体13,框体13为在底板的厚度方向X上的两端均开放的中空结构,底板11和顶板12沿底板的厚度方向X相对设置,且底板11和顶板12分别连接于框体13在底板的厚度方向X上的两侧,以使底板11、顶板12和框体13共同限定出用于容纳电池单体组20的装配空间。电池单体组20为多个,且多个电池单体组20均容纳于箱体10内,多个电池单体组20沿第二方向Z排布,每个电池单体组20包括沿第一方向Y层叠设置的多个电池单体21,底板的厚度方向X、第一方向Y和第二方向Z两两垂直。电池单体21包括外壳211、电极端子212、泄压机构213和电极组件214,外壳211具有壁部2111,外壳211包括壳体2112和端盖2113,壳体2112的内部形成具有开口2112a的容纳腔,容纳腔用于容纳电极组件214,开口2112a位于壳体2112在底板的厚度方向X上面向底板11的一端,端盖2113封闭开口2112a,端盖2113为壁部2111。沿底板的厚度方向X,壁部2111与底板11面向设置,且外壳211远离底板11的一端粘接于顶板12。电极端子212和泄压机构213均设置于壁部2111上,电极端子212与电极组件214电连接,泄压机构213被配置为泄放电池单体21的内部压力。电池单体21包括极性相反的两个电极端子212,两个电极端子212分别为第一电极端子212和第二电极端子212,第一电极端子212和第二电极端子212沿第二方向Z间隔设置于壁部2111上。汇流部件40连接多个电池单体21的电极端子212,以电连接多个电池单体21,沿底板的厚度方向X,汇流部件40连接于电极端子212面向底板11的一端。支撑件30设置于壁部2111和底板11之间且粘接于壁部2111,沿底板的厚度方向X,支撑件30具有背离壁部2111的第一表面31,第一表面31抵接于底板11,且第 一表面31相较于电极端子212、泄压机构213和汇流部件40更靠近底板11。支撑件30沿第一方向Y延伸,且支撑件30与电池单体组20中的多个电池单体21的外壳211的壁部2111均相连。沿第二方向Z,每相邻的两个电池单体组20共用一个支撑件30,支撑件30与相邻的两个电池单体组20的电池单体21的外壳211的壁部2111均相连。在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与支撑件30的正投影不重叠。支撑件30的内部形成有空腔32,且空腔32沿第一方向Y贯穿支撑件30的两端。支撑件30为绝缘材质,且支撑件30的材质的弹性模量大于或等于1000MPa。每个电池单体组20对应设置两个缓冲件60,缓冲件60设置于汇流部件40与底板11之间,且缓冲件60粘接于汇流部件40面向底板11的一侧。沿底板的厚度方向X,缓冲件60的两侧分别抵接于汇流部件40和底板11,一个缓冲件60覆盖多个电池单体21的第一电极端子212,另一个缓冲件60覆盖多个电池单体21的第二电极端子212。在垂直于底板的厚度方向X的平面内,泄压机构213的正投影与缓冲件60的正投影不重叠。缓冲件60为绝缘材质,且缓冲件60的材质的弹性模量大于或等于3MPa且小于或等于100MPa。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已,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保护范围之内。

Claims (27)

  1. 一种电池,包括:
    箱体,包括底板;
    电池单体组,容纳于所述箱体内,所述电池单体组包括至少一个电池单体,所述电池单体包括外壳、电极端子和泄压机构,所述外壳具有壁部,沿所述底板的厚度方向,所述壁部与所述底板面向设置,所述电极端子和所述泄压机构均设置于所述外壳,且所述电极端子和所述泄压机构中的至少一者设置于所述壁部;以及
    支撑件,设置于所述壁部和所述底板之间且连接于所述壁部;
    其中,沿所述底板的厚度方向,所述支撑件具有背离所述壁部的第一表面,所述第一表面相较于所述电极端子和所述泄压机构更靠近所述底板。
  2. 根据权利要求1所述的电池,其中,沿所述底板的厚度方向,所述第一表面抵接于所述底板。
  3. 根据权利要求1或2所述的电池,其中,所述电池单体组包括多个所述电池单体,多个所述电池单体沿第一方向层叠设置,所述第一方向垂直于所述底板的厚度方向;
    其中,所述支撑件沿所述第一方向延伸,且所述支撑件与所述电池单体组中的多个所述电池单体的所述外壳的所述壁部均相连。
  4. 根据权利要求3所述的电池,其中,所述电池包括多个所述电池单体组,多个所述电池单体组沿第二方向排布,所述第二方向垂直于所述底板的厚度方向和所述第一方向;
    其中,沿所述第二方向,每相邻的两个所述电池单体组共用一个所述支撑件,所述支撑件与相邻的两个所述电池单体组的所述电池单体的所述外壳的所述壁部均相连。
  5. 根据权利要求3或4所述的电池,其中,所述支撑件的内部形成有空腔,且所述空腔沿所述第一方向贯穿所述支撑件的两端。
  6. 根据权利要求1-5中任一项所述的电池,其中,所述支撑件的内部形成有空腔。
  7. 根据权利要求1-6中任一项所述的电池,其中,所述支撑件与所述壁部粘接连接。
  8. 根据权利要求1-7中任一项所述的电池,其中,所述支撑件的材质的弹性模量大于或等于1000MPa。
  9. 根据权利要求1-8中任一项所述的电池,其中,所述支撑件为绝缘材质。
  10. 根据权利要求1-9中任一项所述的电池,其中,所述泄压机构设置于所述壁部;
    其中,在垂直于所述底板的厚度方向的平面内,所述泄压机构的正投影与所述支撑件的正投影不重叠。
  11. 根据权利要求1-10中任一项所述的电池,其中,所述电极端子和所述泄压机构均设置于所述壁部。
  12. 根据权利要求1-11中任一项所述的电池,其中,所述电极端子设置于所述壁部;
    其中,所述电池还包括缓冲件,沿所述底板的厚度方向,所述缓冲件设置于所述电极端子和所述底板之间,且所述电极端子的投影的至少部分位于所述缓冲件内。
  13. 根据权利要求12所述的电池,其中,沿所述底板的厚度方向,所述缓冲件覆盖所述电极端子。
  14. 根据权利要求12或13所述的电池,其中,所述电池还包括:
    汇流部件,设置于所述箱体内,沿所述底板的厚度方向,所述汇流部件连接于所述电极端子面向底板的一端,以电连接所述电池单体;
    其中,沿所述底板的厚度方向,所述第一表面相较于所述汇流部件更靠近所述底板,所述缓冲件设置于所述汇流部件与所述底板之间。
  15. 根据权利要求14所述的电池,其中,沿所述底板的厚度方向,所述缓冲件的两侧分别抵接于所述汇流部件和所述底板。
  16. 根据权利要求14或15所述的电池,其中,所述电池单体组包括多个所述电池单体,多个所述电池单体沿第一方向层叠设置,所述汇流部件连接多个所述电池单体的所述电极端子,所述第一方向垂直于所述底板的厚度方向;
    其中,所述缓冲件沿所述第一方向延伸,沿所述底板的厚度方向,所述缓冲件覆盖多个所述电池单体的所述电极端子。
  17. 根据权利要求16所述的电池,其中,所述电池单体包括极性相反的两个所述电极端子,两个所述电极端子分别为第一电极端子和第二电极端子,所述第一电极端子和所述第二电极端子沿第二方向间隔设置于所述壁部上,所述第二方向垂直于所述底板的厚度方向和所述第一方向;
    其中,所述电池单体组对应设置有两个所述缓冲件,两个所述缓冲件沿所述第二方向间隔排布,沿所述底板的厚度方向,一个所述缓冲件覆盖多个所述电池单体的所述第一电极端子,另一个所述缓冲件覆盖多个所述电池单体的所述第二电极端子。
  18. 根据权利要求14-17中任一项所述的电池,其中,所述缓冲件连接于所述汇流部件。
  19. 根据权利要求18所述的电池,其中,所述缓冲件与所述汇流部件粘接连接。
  20. 根据权利要求12-19中任一项所述的电池,其中,所述缓冲件的材质的弹性模量大于或等于3MPa且小于或等于100MPa。
  21. 根据权利要求12-20中任一项所述的电池,其中,所述缓冲件为绝缘材质。
  22. 根据权利要求12-21中任一项所述的电池,其中,所述泄压机构设置于所述壁部;
    其中,在垂直于所述底板的厚度方向的平面内,所述泄压机构的正投影与所述缓冲件的正投影不重叠。
  23. 根据权利要求1-22中任一项所述的电池,其中,所述箱体还包括:
    顶板,与所述底板沿所述底板的厚度方向相对设置且分别位于所述电池单体的两侧;
    其中,沿所述底板的厚度方向,所述外壳连接于所述顶板。
  24. 根据权利要求23所述的电池,其中,所述外壳与所述顶板粘接连接。
  25. 根据权利要求1-24中任一项所述的电池,其中,所述外壳包括:
    壳体,内部形成具有开口的容纳腔,所述容纳腔用于容纳电极组件,所述开口位于所述壳体在所述底板的厚度方向上面向所述底板的一端;
    端盖,封闭所述开口;
    其中,所述端盖为所述壁部。
  26. 根据权利要求1-24中任一项所述的电池,其中,所述外壳包括:
    壳体,包括一体成型的侧壁和所述壁部,所述侧壁围设于所述壁部的周围,沿所述底板的厚度方向,所述侧壁的一端连接于所述壁部,另一端围合形成开口,所述侧壁和所述壁部共同界定出用于容纳电极组件的容纳腔;
    端盖,封闭所述开口。
  27. 一种用电装置,包括如权利要求1-26中任一项所述的电池,所述电池用于提供电能。
PCT/CN2024/118615 2024-04-23 2024-09-12 电池及用电装置 Pending WO2025222735A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202420855007.0 2024-04-23
CN202420855007.0U CN222838941U (zh) 2024-04-23 2024-04-23 电池及用电装置

Publications (1)

Publication Number Publication Date
WO2025222735A1 true WO2025222735A1 (zh) 2025-10-30

Family

ID=95525912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/118615 Pending WO2025222735A1 (zh) 2024-04-23 2024-09-12 电池及用电装置

Country Status (2)

Country Link
CN (1) CN222838941U (zh)
WO (1) WO2025222735A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121035484A (zh) * 2025-10-30 2025-11-28 宁德时代新能源科技股份有限公司 电池装置及用电设备
CN121546261A (zh) * 2026-01-16 2026-02-17 宁德时代新能源科技股份有限公司 一种电池装置及用电装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN217544813U (zh) * 2022-06-16 2022-10-04 大众汽车股份公司 一种电池箱体及电池包
CN217719900U (zh) * 2022-05-27 2022-11-01 宁德时代新能源科技股份有限公司 电池以及用电装置
CN218448284U (zh) * 2022-10-31 2023-02-03 中创新航科技股份有限公司 电池包
CN218939874U (zh) * 2023-01-09 2023-04-28 宁德时代新能源科技股份有限公司 电池及用电装置
CN116742262A (zh) * 2023-06-07 2023-09-12 宁德时代新能源科技股份有限公司 电池及用电装置
CN219801014U (zh) * 2023-04-20 2023-10-03 惠州亿纬锂能股份有限公司 热失控防护装置以及电池包
US20230361416A1 (en) * 2022-05-06 2023-11-09 Calb Co., Ltd. Battery pack and vehicle
CN219998375U (zh) * 2022-06-27 2023-11-10 宁德时代新能源科技股份有限公司 电池及用电装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230361416A1 (en) * 2022-05-06 2023-11-09 Calb Co., Ltd. Battery pack and vehicle
CN217719900U (zh) * 2022-05-27 2022-11-01 宁德时代新能源科技股份有限公司 电池以及用电装置
CN217544813U (zh) * 2022-06-16 2022-10-04 大众汽车股份公司 一种电池箱体及电池包
CN219998375U (zh) * 2022-06-27 2023-11-10 宁德时代新能源科技股份有限公司 电池及用电装置
CN218448284U (zh) * 2022-10-31 2023-02-03 中创新航科技股份有限公司 电池包
CN218939874U (zh) * 2023-01-09 2023-04-28 宁德时代新能源科技股份有限公司 电池及用电装置
CN219801014U (zh) * 2023-04-20 2023-10-03 惠州亿纬锂能股份有限公司 热失控防护装置以及电池包
CN116742262A (zh) * 2023-06-07 2023-09-12 宁德时代新能源科技股份有限公司 电池及用电装置

Also Published As

Publication number Publication date
CN222838941U (zh) 2025-05-06

Similar Documents

Publication Publication Date Title
CN217134495U (zh) 电池和用电装置
WO2025222735A1 (zh) 电池及用电装置
CN220291016U (zh) 电池单体、电池及用电装置
CN220527166U (zh) 电池单体、电池及用电装置
CN219350293U (zh) 电池单体、电池及用电装置
WO2025000688A1 (zh) 电池单体、电池及用电装置
US20250372808A1 (en) Battery cell, battery, and electric device
US20250309476A1 (en) Battery cell, battery, and power consuming device
CN221262464U (zh) 电池单体、电池和用电设备
CN221226274U (zh) 电池单体、电池及用电装置
WO2025118508A1 (zh) 电池单体、电池、用电装置及储能柜
CN118738689A (zh) 电池单体、电池及用电设备
EP4456288A1 (en) Battery pack and energy storage system including same
JP2026507650A (ja) 電池セルのハウジング及び製造方法、電池セル、電池及び電力消費装置
WO2023133737A1 (zh) 电池、用电设备、制备电池的方法和设备
CN221861909U (zh) 电池单体、电池及用电装置
CN224006008U (zh) 电池装置及用电装置
CN224036609U (zh) 电池单体、电池装置、用电装置和储能装置
CN220821659U (zh) 电池单体、电池及用电装置
CN222654138U (zh) 壳体、电池单体、电池和用电设备
CN222775445U (zh) 电池装置、用电装置及储能装置
CN224020875U (zh) 电池装置、用电装置和储能装置
CN222214413U (zh) 电池单体、电池装置及用电装置
CN221861713U (zh) 电池单体、电池及用电装置
CN220544160U (zh) 一种电池单体、电池和用电装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24936627

Country of ref document: EP

Kind code of ref document: A1