WO2025007422A1 - 电池单体、电池和用电装置 - Google Patents
电池单体、电池和用电装置 Download PDFInfo
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- WO2025007422A1 WO2025007422A1 PCT/CN2023/119151 CN2023119151W WO2025007422A1 WO 2025007422 A1 WO2025007422 A1 WO 2025007422A1 CN 2023119151 W CN2023119151 W CN 2023119151W WO 2025007422 A1 WO2025007422 A1 WO 2025007422A1
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- Prior art keywords
- battery cell
- battery
- connection
- mounting hole
- shell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present application relates to the field of battery technology, and in particular to battery cells, batteries and electrical devices.
- Battery cells are used in more and more fields and are gradually replacing traditional petrochemical energy in the field of automotive power.
- Battery cells can store chemical energy and controllably convert chemical energy into electrical energy.
- the active material can be activated by charging after discharge and continue to be used.
- a battery cell includes a housing and an electrode assembly, a sampling assembly, etc. accommodated in the housing.
- the electrode assembly is electrically connected to the outside world through an electrode column
- the sampling assembly is electrically connected to the outside world through a connecting column.
- the sampling assembly usually includes one or more connecting columns, and when the number of sampling assemblies is multiple, the number of connecting columns also increases accordingly.
- a plurality of mounting holes are usually provided on the housing, so that the connecting column can be electrically connected to the outside world by correspondingly installing the plurality of connecting columns at the plurality of mounting holes.
- this structure increases the risk of structural strength failure of the battery cell.
- the present application provides a battery cell, a battery and an electrical device, which can reduce the number of openings on the outer shell of the battery cell to improve its strength, reduce the risk of structural strength failure, and simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve the compactness of the structure.
- the present application provides a battery cell, which includes at least: an outer shell, including a wall portion, the wall portion having a mounting hole connecting the inside and outside of the outer shell; a sampling assembly, accommodated inside the outer shell; a plurality of insulated connection portions, arranged in the mounting hole and sealing the mounting hole, the plurality of connection portions being electrically connected to the sampling assembly.
- multiple connecting parts of the insulating connection that block the mounting hole can be installed through the same mounting hole on the shell, that is, the installation of multiple connecting parts of the insulating connection can be achieved through one mounting hole, which can reduce the number of mounting holes on the shell.
- the above structure can increase the strength of the shell and reduce the risk of structural strength failure of the battery cell; on the other hand, since the sealing performance of the shell will also decrease with the increase in the number of mounting holes, the above structure can also improve the sealing performance of the shell; on the other hand, since the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, it needs to be fixedly connected to the shell, with the increase in the number of mounting holes, the complexity of the battery cell process will also increase, for example, it is necessary to process a step surface for each mounting hole on the shell, etc., which is costly. Therefore, the above structure can also reduce the complexity of the battery cell process and save costs. Further, the multiple connecting parts of the insulating connection are integrated in the same mounting hole. Compared with setting an independent mounting hole without a connecting part, the area occupied by the mounting hole on the shell can be reduced, thereby improving the compactness of the structure.
- the multiple connection parts include a first connection part arranged along a preset axis and a second connection part surrounding at least part of the outer periphery of the first connection part along the circumference of the first connection part.
- the second connection part is closed around the outer periphery of the first connection part.
- the second connection part is closed around the outer periphery of the first connection part, and the second connection part is sleeved on the outer periphery of the first connection part, which can further reduce the area occupied by the second connection part and the first connection part on the wall, thereby reducing the opening area of the mounting hole, thereby improving the strength and sealing performance of the wall; and can improve the compactness of the structure. And increase the size of the second connection part to improve the electrical performance.
- the number of the second connection parts is at least two, and the at least two second connection parts are arranged at intervals along the circumference of the first connection part.
- connection portion is partially arranged around the preset axis, and the multiple connection portions are spaced apart from each other along the circumference of the preset axis.
- the connection portion is partially arranged around the preset axis, and the multiple connection portions are spaced apart from each other along the circumference of the preset axis, so that the multiple connection portions are located on the same outer circumference of the preset axis, and the occupied area of the multiple connection portions on the wall portion can be reduced, thereby reducing the opening area of the mounting hole, improving the strength and sealing performance of the housing, and improving the compactness of the structure.
- the battery cell further comprises: an insulating member disposed between the plurality of connecting parts.
- the insulating member is disposed between adjacent connecting parts to improve interference between the plurality of connecting parts, such as electrical signal interference, to improve the reliability of the battery cell.
- the battery cell further includes a fixing member, the connecting portion is fixed to the fixing member, and the fixing member is fixed to the wall portion.
- the connection between the connecting portion and the wall portion is achieved by the fixing member, which can improve the stability between the connecting portion and the wall portion and reduce the damage to the connecting portion caused by the installation process.
- the fixing member is fixed to the outer periphery of the connecting portion at least partially around the connecting portion along the circumference of the connecting portion.
- the fixing member is arranged on the outer periphery of the connecting portion, which can facilitate the fixing member to be arranged between the inner wall of the mounting hole and the connecting portion, so that the fixing member is located in the mounting hole, which can not only increase the connection stability between the inner wall of the mounting hole and the connecting portion, but also reduce the interference of the fixing member on the internal or external structure of the housing.
- the mounting hole includes a first hole segment and a second hole segment that are connected to each other, the first hole segment is connected to the outside of the shell, and the second hole segment is connected to the inside of the shell, and the first hole segment and the second hole segment form a step surface facing the outside of the shell at the connection between the two, and the fixing member is supported on the step surface.
- the step surface can limit the movement of the fixing member toward the inside of the shell, and the first hole segment and the second hole segment can limit the radial movement range of the fixing member along the mounting hole, which is conducive to the installation of the fixing member and also helps to keep the fixing member structurally stable after the fixing member is installed.
- the fixing member includes: a fixing section and an insertion section arranged along a preset axis direction, the insertion section is arranged in the second hole section, and the fixing section is arranged in the first hole section and supported on a step surface.
- the step surface can limit the movement of the fixing section toward the inside of the housing, the second hole section can limit the radial movement range of the fixing section along the mounting hole, and the first hole section can limit the radial movement range of the insertion section along the mounting hole, thereby facilitating the installation of the fixing member.
- the battery cell further includes: a sealing ring disposed between the fixing section and the step surface to improve the sealing performance between the fixing section and the step surface, thereby improving the reliability of the battery cell.
- the housing includes a shell and an end cover, the shell is provided with an open end, the end cover is provided at the open end, the sampling assembly is accommodated inside the shell, the end cover forms a wall portion, and the mounting hole is provided at the end cover.
- the sampling assembly includes multiple sampling modules, each sampling module is connected to at least one connection part, and the environmental information inside the shell can be obtained through the sampling module to improve the effectiveness of managing the working status of the battery cell, thereby improving the working stability of the battery cell.
- the battery cell further includes: a circuit board disposed outside the housing and electrically connected to the connection portion.
- the circuit board arranged outside the shell and electrically connected to the connecting part processes the environmental information obtained by the sampling component to determine the gas composition and concentration, temperature or pressure inside the shell, thereby analyzing the working state of the battery cell.
- the circuit board is disposed on the side of the wall away from the sampling assembly.
- the circuit board By disposing the circuit board on the side of the wall away from the sampling assembly, i.e., outside the housing, it is convenient to install and remove the circuit board.
- the wall can prevent the circuit board from contacting the electrode assembly and the electrolyte, reducing the risk of the circuit board short-circuiting due to contact with the electrode assembly, while reducing the corrosion of the electrode assembly and the electrolyte to the circuit board.
- the present application provides a battery, including the above-mentioned battery cell.
- a battery including the above-mentioned battery cell.
- Such a configuration can reduce the number of openings on the outer shell of the battery cell, thereby improving its strength and reducing the risk of structural strength failure, and can simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve the compactness of the structure.
- the battery further comprises: a battery management unit electrically connected to the connection portion.
- the battery management unit is electrically connected to the connection portion so that the battery management unit automatically manages the battery cells according to the environmental information obtained by the sampling component.
- the battery further comprises: a box body, in which the battery cell is disposed; and a circuit board, which is disposed outside the box body and electrically connected to the connection portion.
- the circuit board disposed in the box body and electrically connected to the connection portion is used to process the environmental information obtained by the sampling component to determine the gas composition and concentration, temperature or pressure inside the housing, thereby analyzing the working state of the battery cell.
- the present application provides an electrical device, including the above-mentioned battery.
- Such a configuration can reduce the number of openings on the outer shell of the battery cell, thereby improving its strength and reducing the risk of structural strength failure, and can simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve the compactness of the structure.
- FIG1 is a schematic structural diagram of a vehicle according to one or more embodiments.
- FIG2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments.
- FIG3 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments.
- FIG4 is a schematic block diagram of a battery cell according to one or more embodiments.
- FIG5 is a schematic structural diagram of the wall portion, electrode column, connection portion, and plastic part of the battery cell shown in FIG3 ;
- FIG6 is a schematic diagram of a top view of the structure shown in FIG5 ;
- FIG7 is a schematic diagram of a partial structure of a cross section of the structure shown in FIG6 along the A-A cutting line;
- FIG8 is a schematic diagram of an enlarged structure of structure B in the structure shown in FIG7 ;
- FIG9 is another schematic diagram of the structure of a battery cell according to one or more embodiments.
- FIG10 is another schematic structural diagram of a battery cell according to one or more embodiments.
- FIG. 11 is another schematic diagram of the structure of a battery cell according to one or more embodiments.
- 1 battery cell 100 housing; 101 wall; 102 mounting hole; 142 first hole section; 122 second hole section; 132 step surface; 110 housing; 111 opening end; 112 opening; 120 end cover; 152 sealing ring; 200 electrode assembly; 201 tab; 300 circuit board; 400 sampling assembly; 500 fixing part; 600 plastic part; 700 connecting part; 707 insulating substrate; 710 first connecting part; 720 second connecting part; 800 insulating part; 900 electrode column; F preset axis.
- multiple refers to more than two (including two).
- multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
- battery cells are used in more and more fields and are gradually replacing traditional fossil energy in the field of automotive power.
- Battery cells can store chemical energy and controllably convert chemical energy into electrical energy.
- the active material can be activated by charging after discharge and continue to be used.
- a battery cell includes an outer shell and an electrode assembly, a sampling assembly, etc. accommodated in the outer shell.
- the electrode assembly is electrically connected to the outside world through the electrode column
- the sampling assembly is electrically connected to the outside world through the connecting column.
- the sampling assembly usually includes one or more connecting columns, and when the number of sampling assemblies is multiple, the number of connecting columns also increases accordingly.
- a plurality of mounting holes are usually provided on the outer shell, so that the electrical connection between the connecting columns and the outside world can be achieved by correspondingly installing the plurality of connecting columns at the plurality of mounting holes.
- the strength of the outer shell will decrease as the number of mounting holes increases, and as the number of mounting holes increases, the risk of structural strength failure of the battery cell will increase; on the other hand, the sealing performance of the outer shell will also increase as the number of mounting holes increases.
- the connecting column corresponding to each mounting hole needs to be installed in the corresponding mounting hole, that is, it needs to be fixedly connected to the shell, as the number of mounting holes increases, the complexity of the battery cell process will also increase, and the cost is higher.
- the present application provides a battery cell, a battery and an electrical device.
- the battery cell includes a shell, including a wall portion, the wall portion is provided with a mounting hole connecting the inside and outside of the shell; a sampling assembly is accommodated inside the shell; a plurality of insulatingly connected connection parts are arranged in the mounting hole and block the mounting hole, and the plurality of connection parts are electrically connected to the sampling assembly.
- the plurality of insulatingly connected connection parts that block the mounting hole can be installed through the same mounting hole on the shell, that is, the installation of the plurality of insulatingly connected connection parts is achieved through one mounting hole, which can reduce the number of mounting holes on the shell, thereby reducing the risk of structural strength failure of the battery cell, improving the sealing performance of the shell, and reducing the process complexity of the battery cell, saving costs, and also improving the compactness of the structure.
- the battery cells, batteries and electrical devices disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements.
- Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc.
- electric toys can include fixed 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.
- Vehicle 1000a can be a fuel vehicle, a gas vehicle or a new energy vehicle.
- the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
- a battery 100a is arranged inside the vehicle 1000a.
- the battery 100a can be arranged at the bottom, head or tail of the vehicle 1000a.
- the battery 100a can be used to power the vehicle 1000a.
- the battery 100a can be used as an operating power source for the vehicle 1000a.
- the vehicle 1000a can also include a controller 200a and a motor 300a.
- the controller 200a is used to control the battery 100a to power the motor 300a, for example, for the starting, navigation and driving power requirements of the vehicle 1000a.
- the battery 100a can not only serve as the operating power source of the vehicle 1000a, but also serve as the driving power source of the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.
- the battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.
- the battery 100 a mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.
- the battery cell 1 may be a secondary battery, which refers to a battery cell 1 that can be continuously used by activating the active material by charging after the battery cell 1 is discharged.
- Each battery cell 1 may also be a primary battery.
- the battery cell 1 includes but is not limited to lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.
- the battery cell 1 can be cylindrical, flat, rectangular or other shapes.
- the battery 100a may be a battery module.
- the multiple battery cells 1 are arranged and fixed to form a battery module.
- the battery 100 a may be a battery pack, which includes a box body 10 a and a battery cell 1 .
- the battery cell 1 or a battery module is accommodated in the box body 10 a .
- the box 10a can be used as part of the chassis structure of the vehicle 1000a.
- part of the box 10a can become at least a part of the floor of the vehicle 1000a, or part of the box 10a can become a crossbeam of the vehicle 1000a. and at least a portion of a longitudinal beam.
- the battery 100a includes a box body 10a and a battery cell 1, and the battery cell 1 is contained in the box body 10a.
- the box body 10a is used to provide a storage space for the battery cell 1, and the box body 10a can adopt a variety of structures.
- the box body 10a may include a first part 11a and a second part 12a, and the first part 11a and the second part 12a cover each other, and the first part 11a and the second part 12a jointly define a storage space for accommodating the battery cell 1.
- the second part 12a may be a hollow structure with one end open, and the first part 11a may be a plate-like structure, and the first part 11a covers the open side of the second part 12a, so that the first part 11a and the second part 12a jointly define a storage space; the first part 11a and the second part 12a may also be hollow structures with one side open, and the open side of the first part 11a covers the open side of the second part 12a.
- the box body 10a formed by the first part 11a and the second part 12a can be in various shapes, such as a cylinder, a cuboid, etc.
- the battery 100a there can be multiple battery cells 1, and the multiple battery cells 1 can be connected in series, in parallel, or in a mixed connection.
- the mixed connection means that the multiple battery cells 1 are both connected in series and in parallel.
- the multiple battery cells 1 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 1 is accommodated in the box 10a; of course, the battery 100a can also be a battery module formed by connecting multiple battery cells 1 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10a.
- the battery 100a can also include other structures.
- the battery 100a can also include a converging component for realizing electrical connection between the multiple battery cells 1.
- a battery cell 1 refers to the smallest unit constituting a battery.
- a cylindrical battery cell 1 is taken as an example for description.
- the battery cell 1 includes a housing 100, an electrode assembly 200 and other functional components.
- the housing 100 is used to encapsulate the electrode assembly 200 and electrolyte components.
- the housing 100 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film.
- the housing 100 may include an end cap 120 and a shell 110.
- the end cap 120 refers to a component that covers the opening of the shell 110 to isolate the internal environment of the battery cell 1 from the external environment.
- the shape of the end cap 120 can be adapted to the shape of the shell 110 to match the shell 110.
- the end cap 120 can be made of a material with a certain hardness and strength (such as an aluminum alloy), so that the end cap 120 is not easily deformed when squeezed and collided, so that the battery cell 1 can have a higher structural strength and the safety performance can also be improved.
- Functional components such as an electrode column 900 may be provided on the end cap 120.
- the electrode column 900 can be used to be electrically connected to the electrode assembly 200 for outputting or inputting electrical energy of the battery cell 1.
- the end cap 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold.
- the material of the end cap 120 may also be various, for example, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
- an insulating component may be provided inside the end cap 120, and the insulating component may be used to isolate the electrical connection components in the housing 110 from the end cap 120 to reduce the risk of short circuit.
- the insulating component may be plastic, rubber, etc.
- the shell 110 is a component used to cooperate with the end cap 120 to form the internal environment of the battery cell 1, wherein the formed internal environment can be used to accommodate the electrode assembly 200, the electrolyte and other components.
- the shell 110 and the end cap 120 can be independent components, and an opening 112 can be set on the shell 110, and the end cap 120 is covered with the opening 112 at the opening 112 to form the internal environment of the battery cell 1.
- the end cap 120 and the shell 110 can also be integrated.
- the end cap 120 and the shell 110 can form a common connection surface before other components are put into the shell, and when the interior of the shell 110 needs to be encapsulated, the end cap 120 is covered with the shell 110.
- the shell 110 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 110 can be determined according to the specific shape and size of the electrode assembly 200.
- the material of the shell 110 can be various, for example, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
- the electrode assembly 200 is a component where electrochemical reactions occur in the battery cell 1.
- One or more electrode assemblies 200 may be contained in the housing 110.
- the electrode assembly 200 includes a positive electrode, a negative electrode, and a separator.
- active ions such as lithium ions
- the separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting and allow the active ions to pass through.
- the positive electrode may be a positive electrode sheet, and the positive electrode sheet 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 electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.
- the positive electrode current collector may be a metal foil or a composite current collector.
- the metal foil aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used.
- the composite current collector may include a polymer material base and a metal layer.
- the composite current collector may 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-containing phosphates, lithium transition metal oxides and their respective modified compounds.
- the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more.
- lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO 4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.
- lithium iron phosphate such as LiFePO 4 (also referred to as LFP)
- LiMnPO 4 lithium manganese phosphate
- LiMnPO 4 lithium manganese phosphate
- LiMnPO 4 lithium manganese phosphate and carbon
- lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 , LiMn2O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1/3 Co 1/3 Mn 1/3 O 2 (also referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O 2 (also referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O 2 (also referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O 2 (also referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O 2 (also referred to as NCM 811 ), and LiNi 0.8 Co 0.2 Mn 0.2 O 2 (also referred to as NCM 811 ),
- 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 aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used.
- the foamed metal can be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon, etc.
- the composite current collector can include a polymer material base and a metal layer.
- the composite current collector 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 facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.
- the negative electrode active material may adopt the negative electrode active material for battery cell 1 known in the art.
- 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, lithium titanate, etc.
- the silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys.
- the tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys.
- the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.
- the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.
- the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.
- the separator is a separator.
- the present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.
- the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.
- the separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions.
- the separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.
- the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.
- the battery cell 1 further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes.
- an electrolyte which plays a role in conducting ions between the positive and negative electrodes.
- the present application has no specific restrictions on the type of electrolyte, which can be selected according to needs.
- the electrolyte can be liquid, gel or solid.
- the liquid electrolyte includes an electrolyte salt and a solvent.
- the electrolyte salt can be selected from 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 difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.
- the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone.
- the solvent can also be selected from ether solvents.
- Ether solvents can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.
- the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.
- solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.
- the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.
- the inorganic solid electrolyte can be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.
- oxide solid electrolyte crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film
- a sulfide solid electrolyte crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride
- the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.
- the electrode assembly 200 is a wound structure.
- the positive electrode sheet and the negative electrode sheet are wound into a wound structure.
- the electrode assembly 200 is provided with a tab 201, which can lead current from the electrode assembly 200.
- the tab includes a positive tab and a negative tab.
- the positive tab and the negative tab can be located at one end of the main body or at both ends of the main body.
- the positive active material and the negative active material react with the electrolyte, and the tab 201 connects the electrode column 900 to form a current loop.
- the battery cell 1 described in the embodiment of the battery cell 1 of the present application includes a housing 100, a sampling assembly 400, and a plurality of insulatingly connected connection parts 700.
- the housing 100 includes a wall 101, and the wall 101 is provided with a mounting hole 102 connecting the inside and the outside of the housing 100; the sampling assembly 400 is accommodated inside the housing 100; the plurality of insulatingly connected connection parts 700 are arranged in the mounting hole 102 and block the mounting hole 102, and the plurality of connection parts 700 are electrically connected to the sampling assembly 400.
- the plurality of connecting parts 700 are integrated into one body, directly or through an insulating member to block the mounting hole 102.
- the connecting part 700 extends along the axial direction of the mounting hole 102 to connect the sampling assembly 400 disposed in the housing 100 and realize the connection between the sampling assembly 400 and the housing 100. External devices for electrical transmission.
- connection part 700 refers to a component or a structural part used to achieve electrical connection, and the connection part 700 may include a conductive part such as a metal part.
- connection portion 700 can be set according to the size, electrical parameters and other requirements of the sampling assembly 400 and the battery cell 1 .
- the outer contour shape of the multiple connecting parts 700 of the insulating connection or the outer contour shape of the insulating member outside thereof matches the shape of the mounting hole 102, so that the mounting hole 102 is used to install and position the multiple connecting parts 700 of the insulating connection.
- the sampling component 400 is used to obtain environmental information inside the housing 100 , and generate an electrical signal based on the environmental information.
- the electrical signal is transmitted to a device outside the housing 100 through the connecting portion 700 .
- multiple connecting parts 700 of insulating connection that block the mounting hole 102 can be installed through the same mounting hole 102 on the housing 100, that is, the installation of multiple connecting parts 700 of insulating connection can be achieved through one mounting hole 102, which can reduce the number of mounting holes 102 on the housing.
- the above structure can increase the strength of the housing 100 and reduce the risk of structural strength failure of the battery cell 1; on the other hand, since the sealing performance of the housing 100 will also decrease with the increase in the number of mounting holes 102, the above structure can also improve the sealing performance of the housing 100; on the other hand, since the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, it needs to be fixedly connected to the housing, as the number of mounting holes 102 increases, the complexity of the process of the battery cell 1 will also increase, for example, it is necessary to process a step surface for each mounting hole 102 on the housing 100, etc., which is costly.
- the above structure can also reduce the complexity of the process of the battery cell 1 and save costs. Furthermore, by integrating the multiple connecting parts 700 of the insulated connection into the same mounting hole 102, compared with providing an independent mounting hole 102 without the connecting part 700, the area occupied by the mounting hole 102 on the housing can be reduced, thereby improving the compactness of the structure.
- the battery cell 1 further includes an electrode assembly 200 , and the electrode assembly 200 is accommodated inside the housing 100 .
- the detailed description can be found above.
- the plurality of connection portions 700 include a first connection portion 710 disposed along a predetermined axis F and a second connection portion 720 surrounding at least a portion of the outer circumference of the first connection portion 710 along a circumferential direction of the first connection portion 710 .
- the preset axis F being arranged along the preset axis F means being arranged extending along the preset axis F, that is, the axis of the first connecting portion 710 coincides with or is parallel to the preset axis F, and the preset axis F passes through the inside of the first connecting portion 710;
- the preset axis F is the axis of a connecting body formed by the integrated arrangement of multiple connecting portions 700, and the connecting body can be arranged in a columnar shape or the like.
- the preset axis F can also be the axis of the mounting hole 102.
- the circumferential direction of the preset axis F refers to a direction perpendicular to the preset axis F and surrounding the preset axis F.
- the occupied area of the multiple connection parts 700 of the insulation connection on the wall part 101 can be reduced, thereby reducing the opening area of the mounting hole 102, and further improving the strength and sealing performance of the wall part 101; and by arranging the second connection part 720 around at least part of the periphery of the first connection part 710, the arrangement area between the second connection part 720 and the first connection part 710 can be reduced, thereby further reducing the opening area of the mounting hole 102, and further improving the strength and sealing performance of the wall part 101; and the compactness of the structure can be improved.
- the number of second connection parts can be set according to the structural requirements and performance requirements of the sampling component 400 inside the shell 100, and the specific position and size of the second connection part can be set according to the structural requirements and performance requirements of the sampling component 400, the opening area of the mounting hole 102, etc.
- the second connection portion 720 is closed around the outer circumference of the first connection portion 710 .
- the second connection part 720 is closed and surrounded on the outer periphery of the first connection part 710, and the second connection part 720 is sleeved on the outer periphery of the first connection part 710, which can further reduce the occupied area of the second connection part 720 and the first connection part 710 on the wall part 101, thereby reducing the opening area of the mounting hole 102, thereby improving the strength and sealing performance of the wall part 101; and can improve the compactness of the structure. And the size of the second connection portion 720 is increased to improve the electrical performance.
- the number of the second connection portions 720 is at least two, and the at least two second connection portions 720 are arranged at intervals along the circumference of the first connection portion 710 .
- the second connecting part 720 is arranged around at least part of the periphery of the first connecting part 710, which can reduce the arrangement area between the second connecting part 720 and the first connecting part 710, thereby further reducing the opening area of the mounting hole 102, thereby further improving the strength and sealing performance of the wall part 101, and improving the compactness of the structure.
- first connection portion 710 is disposed on a preset axis F, and the two second connection portions 720 are disposed at intervals along the circumference of the first connection portion 710 .
- the embodiment of the present application does not limit the size and uniformity of the arrangement of the plurality of second connection portions 720 .
- the number of the second connection parts may be three or more, and they may be located on the same outer periphery of the first connection part, or on multiple different outer peripheries of the first connection part.
- the plurality of second connection parts being located at the same outer circumference means that the distances from the plurality of second connection parts to the first connection part are equal.
- connection portion 700 is partially disposed around the preset axis F, and a plurality of connection portions 700 are spaced apart from each other along the circumference of the preset axis F.
- connection portion 700 is partially arranged around the preset axis F, and the multiple connection portions 700 are spaced apart from each other along the circumference of the preset axis F, so that the multiple connection portions 700 can be located on the same outer circumference of the preset axis F, which can reduce the occupied area of the multiple connection portions 700 on the wall portion 101, thereby reducing the opening area of the mounting hole 702, thereby improving the strength and sealing performance of the outer shell 100 and improving the compactness of the structure.
- a plurality of connection portions arranged along the circumferential direction may be located on the outer circumference of the same circle, or on the outer circumferences of different circles, or partially on the outer circumference of the same circle.
- the battery cell 1 further includes: an insulating member 800 , and the insulating member 800 is disposed between the plurality of connecting portions 700 .
- An insulating member 800 is disposed between adjacent connecting portions 700 to improve interference between the plurality of connecting portions 700 , such as electrical signal interference, and to improve the reliability of the battery cell 1 .
- the insulating member 800 may include a plastic member, etc.
- the plastic material facilitates the molding of the plastic member.
- the insulating member 800 may include an insulating member with better heat dissipation, such as ceramics, etc.
- connection part 700 and the insulating member 800 are integrally molded. In this way, the connection stability between the connection part 700 and the insulating member 800 can be improved, thereby improving the reliability of the battery cell 1, and simplifying the installation process between the connection part 700 and the insulating member 800, further reducing the process complexity of the battery cell 1.
- the battery cell 1 further includes a fixing member 500 , the connecting portion 700 is fixed to the fixing member 500 , and the fixing member 500 is fixedly connected to the wall portion 101 .
- connection between the connecting portion 700 and the wall portion 101 is achieved by using the fixing member 500 , which can improve the stability between the connecting portion 700 and the wall portion 101 and reduce the damage to the connecting portion 700 caused by the installation process.
- the fixing member 500 is fixed to the outer circumference of the connecting portion 700 at least partially around the connecting portion 700 along the circumference of the connecting portion 700 .
- Setting the fixing member 500 on the periphery of the connecting portion 700 can facilitate setting the fixing member 500 between the inner wall of the mounting hole 102 and the connecting portion 700, so that the fixing member 500 is located inside the mounting hole 102. This can not only increase the connection stability between the inner wall of the mounting hole 102 and the connecting portion 700, but also reduce the interference of the fixing member 500 on the internal or external structure of the housing 100.
- the fixing member 500 can be a metal bracket having a mounting hole, and the connecting part 700 is installed in the mounting hole.
- the metal bracket is used as the fixing member 500 of the connecting part 700 and connected to the wall part 101, which can improve the connection stability because the metal bracket can be connected to the wall part 101 by a connection method with better stability, such as welding, riveting, etc., thereby improving the reliability of the battery cell 1.
- Another insulating member may also be provided on the inner wall of the mounting hole 102 to achieve insulation isolation between the metal bracket and the connecting portion 700 , thereby improving the reliability of the battery cell 1 .
- the battery cell 1 further includes an insulating substrate 707, which is covered on the side of the metal bracket away from the inside of the housing 100, and the insulating substrate 707 is provided with another mounting hole corresponding to and connected with the mounting hole 102, and the connecting portion 700 is embedded in the corresponding mounting hole 102 and the mounting hole on the insulating substrate 707.
- the strength of the metal bracket can be increased; on the other hand, the insulating substrate 707 has an electrical, liquid and other isolation effect on the metal bracket, as well as a buffering effect, which can reduce the problem of damage or interference to the metal bracket.
- the insulating substrate 707 may include a plastic substrate, etc.
- the plastic material facilitates the molding of the plastic substrate.
- the insulating substrate 707 may include an insulating substrate with better heat dissipation, such as a ceramic substrate.
- the metal bracket is fixed to the wall 101 by welding.
- the welding process can form a melt, and the melt can connect the metal bracket and the wall 101 after solidification, which can improve the stability between the metal bracket and the wall 101, thereby improving the reliability of the battery cell 1.
- the mounting hole 102 includes a first hole segment 142 and a second hole segment 122 that are connected to each other, the first hole segment 142 is connected to the outside of the shell 100, and the second hole segment 122 is connected to the inside of the shell 100.
- the first hole segment 142 and the second hole segment 122 form a step surface 132 facing the outside of the shell at the connection between the two, and the fixing member 500 is supported on the step surface 132.
- the step surface 132 can limit the movement of the fixing member 500 toward the inside of the housing 100, and the first hole section 142 and the second hole section 122 can limit the radial movement range of the fixing member 500 along the mounting hole 102, which is beneficial for the installation of the fixing member 500 and also beneficial for maintaining the structural stability of the fixing member 500 after the fixing member 500 is installed.
- the axial direction of the mounting hole 102 refers to the spacing direction between one end of the mounting hole 102 facing the inside of the housing 100 and one end away from the inside of the housing 100 .
- the radial direction of the mounting hole 102 is perpendicular to the axial direction of the mounting hole 102 .
- the fixing member 500 includes: a fixing section and an insertion section arranged along a preset axis F, the insertion section is arranged in the second hole section 122 , and the fixing section is arranged in the first hole section 142 and supported on the step surface 132 .
- the step surface 132 can limit the movement of the fixing section toward the inside of the housing 100, the second hole section 122 can limit the radial movement range of the fixing section along the mounting hole 102, and the first hole section 142 can limit the radial movement range of the insertion section along the mounting hole 102, thereby facilitating the installation of the fixing member 500.
- the fixing section and the wall portion 101 may be connected by welding.
- the battery cell 1 further includes: a sealing ring 152 disposed between the fixing section and the step surface 132 to improve the sealing performance between the fixing section and the step surface 132 , thereby improving the reliability of the battery cell 1 .
- connection part 700 may include a plurality of signal parts, and the signal parts are electrically connected to the sampling component 400 .
- the connecting part 700 may also include two power supply parts and at least one signal part.
- the battery cell 1 includes two electrode columns 900.
- the two electrode columns 900 are arranged on the wall 101 and extend to the outside of the shell 100.
- the two power supply parts are electrically connected to the two electrode columns 900 correspondingly outside the shell 100 to power the sampling component 400.
- connection part 700 is connected to the electrode column 900 outside the shell 100 and the sampling assembly 400 inside the shell 100 is powered by the connection part, which can reduce the power supply line structure inside the shell 100, facilitate maintenance and improve the safety of the battery cell 1.
- the housing 100 includes a housing 110 and an end cover 120 .
- the housing 110 is provided with an opening.
- the end cover 120 is disposed on the open end 111 , and the sampling assembly 400 and the electrode assembly 200 are accommodated in the housing 110 .
- the end cover 120 forms the wall portion 101 .
- the mounting hole 102 is opened in the end cover 120 .
- the opening 112 may be formed at the open end 111. By forming the mounting hole 102 on the end cover 120, the mounting hole 102 is conveniently blocked.
- the sampling assembly 400 may be disposed on the inner side of the end cover 120 to facilitate installation of the sampling assembly 400 and collection of the environment inside the housing 100 .
- the sampling assembly 400 may be disposed on the inner side of the end cover 120 and connected thereto, or connected to other components in the housing 100 by injection molding or bonding, so as to facilitate the routing of the sampling assembly 400 .
- the end cap 120 can play a role in positioning the two electrode columns 900.
- the electrode column 900 can be relatively fixed to the end cap 120.
- one end of the electrode column 900 is arranged toward the interior of the outer shell 100 and can be used to electrically connect the electrode assembly 200 arranged in the outer shell 100.
- the other end of the electrode column 900 is arranged toward the outside of the outer shell 100 and can be connected to the outside world and the circuit board 300, so that the electrode assembly 200 can supply power to the outside world and the circuit board 300 respectively through the electrode column 900.
- the electrode assembly 200 can be charged through the electrode column 900 .
- the housing 110 may form a wall portion 101.
- the mounting hole 102 may be provided in the housing 110, for example, in the bottom wall of the housing 110, and the bottom wall of the housing 110 is arranged opposite to the open end 111. In this way, the mountable area of the connecting portion 700 may be increased.
- the sampling assembly 400 includes a plurality of sampling modules, each of which is connected to at least one connection portion 700 .
- the sampling module is used to sample the environment inside the housing 100.
- the interior of the housing 100 is often in a dynamic change process, for example, the electrode assembly 200 may expand in volume, or the temperature and pressure inside the housing 100 may change, or gas may be generated inside the housing 100.
- the sampling module can be used to obtain environmental information inside the housing 100, such as sampling the gas, temperature or air pressure inside the housing 100, so as to improve the effectiveness of managing the working state of the battery cell 1, thereby improving the working stability of the battery cell 1.
- connection parts 700 connected to the sampling modules can be set according to the type and structural requirements of the sampling modules.
- the sampling component 400 may include a sampling module having multiple signal terminals, which may be electrically connected to multiple connecting parts 700 respectively; or the sampling component 400 includes multiple sampling modules, each of which may be provided with a single or multiple signal terminals to be connected to a single or multiple connecting parts 700.
- the sampling assembly 400 may include one or more of a pressure sampling module, a gas sampling module, or a temperature sampling module.
- the air pressure sampling module can be used to detect the air pressure inside the housing 100. During the operation of the battery cell 1, changes in air pressure may occur, for example, gas is generated inside the housing 100 or the temperature rises, causing the air pressure to rise rapidly. The air pressure inside the housing 100 can be detected by the air pressure sampling module, which is conducive to managing the working state of the battery cell 1.
- the temperature sampling module can be used to detect the temperature inside the housing 100. Temperature changes, such as temperature rise, may occur during the operation of the battery cell 1. Detecting the temperature inside the housing 100 through the temperature sampling module is conducive to managing the operating state of the battery cell 1.
- the gas sampling module can be used to detect the type of gas in the housing 100 , which is helpful for managing the working status of the battery cell 1 .
- the sampling module may be disposed in a packaging shell, and the packaging shell is connected to the end cover 120 to improve the reliability of the sampling module.
- the packaging shell can protect the sampling module.
- the packaging shell can reduce the damage to the sampling module caused by factors outside the housing 100, and on the other hand, the packaging shell can block the sampling module from the electrode assembly 200 and the electrolyte, thereby reducing the corrosion of the sampling module by the electrolyte inside the housing 100 and the electrode assembly 200, and reducing the risk of short circuit caused by direct contact between the sampling module and the electrode assembly 200.
- the packaging shell can be fixed to the end cover 120 by welding.
- the battery cell 1 further includes a plastic part 600 located between the electrode assembly 200 and the wall portion 101 .
- the plastic part 600 is made of plastic material, which facilitates the molding of the plastic part 600 .
- the plastic part 600 is made of insulating material, and can form insulation between the electrode assembly 200 and the wall portion 101 , thereby limiting the current from directly flowing from the electrode assembly 200 into the wall portion 101 or directly flowing from the wall portion 101 into the electrode assembly 200 .
- the battery cell 1 further includes a circuit board 300 , which is disposed outside the housing 100 and is electrically connected to the connection portion 700 .
- the circuit board 300 disposed outside the housing 100 and electrically connected to the connection portion 700 is used to process the environmental information obtained by the sampling component 400 to determine the gas composition and concentration, temperature or pressure inside the housing 100, thereby analyzing the working state of the battery cell 1.
- the circuit board 300 is disposed on a side of the wall 101 facing away from the sampling assembly 400 , that is, a side of the wall 101 facing away from the interior of the housing 100 .
- the circuit board 300 By arranging the circuit board 300 on the side of the wall 101 away from the sampling assembly 400, that is, outside the housing 100, it is convenient to install and remove the circuit board 300.
- the wall 101 can prevent the circuit board 300 from contacting the electrode assembly 200 and the electrolyte, reducing the risk of short circuit of the circuit board 300 due to contact with the electrode assembly 200, and reducing the corrosion of the electrode assembly 200 and the electrolyte to the circuit board 300.
- the battery cell 1 further includes a processor, which is disposed on the circuit board 300 and electrically connected to the connection portion 700 .
- the processor can process the environmental information sampled by the sampling component 400, so that the battery cell 1 can be intelligent. For example, the processor can determine the gas composition and concentration, temperature or pressure inside the housing 100 according to the environmental information obtained by the sampling component 400, thereby analyzing the working state of the battery cell 1.
- the processor may be an integrated circuit chip with signal processing capabilities.
- the processor may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.
- DSP digital signal processor
- ASIC application-specific integrated circuit
- FPGA field programmable gate array
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
- the processor is an MCU.
- the connection stability between the processor and the circuit board 300 can be improved, thereby improving the connection stability between the processor and the sampling component 400 .
- the space on the side of the circuit board 300 facing away from the inside of the housing 100 is relatively spacious, and the processor can be arranged on the side of the circuit board 300 facing away from the inside of the housing 100, which is beneficial to the heat dissipation of the processor.
- the battery cell 1 includes a housing 100, a sampling assembly 400, and a plurality of insulatingly connected connection parts 700.
- the housing 100 includes an end cover 120, and the end cover 120 is provided with a mounting hole 102 connecting the inside and outside of the housing 100; the sampling assembly 400 is accommodated inside the housing 100; the plurality of insulatingly connected connection parts 700 are arranged in the mounting hole 102 and block the mounting hole 102, and the plurality of connection parts 700 are electrically connected to the sampling assembly 400.
- the plurality of connecting parts 700 include a first connecting part 710 arranged along a preset axis F and a peripheral connecting part 710 arranged along a preset axis F.
- the second connection portion 720 surrounds at least a portion of the outer circumference of the first connection portion 710 , and the second connection portion 720 closes and surrounds the outer circumference of the first connection portion 710 .
- the battery cell 1 further includes: an insulating member 800, a fixing member 500, an insulating substrate 707, and a sealing ring 152; wherein the insulating member 800 is disposed between a plurality of connecting portions 700.
- the connecting portion 700 is fixed to the fixing member 500, and the fixing member 500 is fixedly connected to the end cover 120.
- the insulating substrate 707 is covered on the side of the fixing member 500 away from the inside of the housing 100, and the insulating substrate 707 is provided with another mounting hole corresponding to and connected to the mounting hole 102, and the connecting portion 700 is embedded in the corresponding mounting hole 102 and the mounting hole on the insulating substrate 707.
- the sealing ring 152 is disposed between the fixing section and the step surface 132.
- the battery cell 1 further includes a plastic member 600 located between the electrode assembly 200 and the wall portion 101.
- the mounting hole 102 includes a first hole section 142 and a second hole section 122 that are connected to each other.
- the first hole section 142 is connected to the outside of the housing 100, and the second hole section 122 is connected to the inside of the housing 100.
- the first hole section 142 and the second hole section 122 form a step surface 132 facing the outside of the housing at the connection between the first hole section 142 and the second hole section 122.
- the fixing member 500 includes a fixing section and an insertion section arranged along the preset axis F direction. The insertion section is arranged in the second hole section 122, and the fixing section is arranged in the first hole section 142 and supported on the step surface 132.
- multiple connecting parts can also be arranged in a manner of extending and splicing circumferentially around a preset axis F; or one connecting part is arranged along the preset axis F, and the other connecting parts are extended and spliced around the outer circumference of the connecting part; multiple connecting parts can be arranged in a circle of the outer circumference or in multiple circles of the outer circumference stacked radially.
- a battery 100a includes the above-mentioned battery cell 1.
- Such a configuration can reduce the number of openings on the outer shell of the battery cell to improve its strength, reduce the risk of structural strength failure, simplify the process, and save costs; further, it can also reduce the space occupied by the openings and improve the compactness of the structure.
- the battery 100a further includes a battery management unit, which is electrically connected to the connection portion 700.
- the battery management unit is electrically connected to the connection portion 700, so that the battery management unit automatically manages the battery cell 1 according to the environmental information obtained by the sampling component 400, such as processing the environmental information obtained by the sampling component 400 to determine the gas composition and concentration, temperature or pressure inside the housing 100, thereby analyzing the working state of the battery cell 1.
- the battery 100 a further includes a box body 10 a and a circuit board 300 , wherein the battery cell 1 is disposed in the box body 10 a ; the circuit board 300 is disposed outside the box body 10 a and is electrically connected to the connection portion 700 .
- the circuit board 300 disposed in the box 10a and electrically connected to the connection part 700 processes the environmental information obtained by the sampling component 400 to determine the gas composition and concentration, temperature or pressure inside the housing 100, thereby analyzing the working state of the battery cell 1.
- the box 10a can prevent the circuit board 300 from contacting the electrode assembly 200 and the electrolyte, reduce the risk of the circuit board 300 short-circuiting due to contact with the battery cell 1, and reduce the interference of the battery cell 1 on the circuit board 300.
- the electric device includes the above-mentioned battery 100a.
- Such a configuration can reduce the number of openings on the outer shell of the battery cell to improve its strength, reduce the risk of structural strength failure, simplify the process, and save costs; further, it can also reduce the space occupied by the openings and improve the compactness of the structure.
- the embodiments of the present application can install multiple insulating connection parts that block the mounting holes through the same mounting hole on the outer shell, that is, the installation of multiple insulating connection parts is achieved through one mounting hole, which can reduce the number of mounting holes on the outer shell.
- the above structure can increase the strength of the outer shell and reduce the risk of structural strength failure of the battery cell; on the other hand, because the sealing performance of the outer shell will also decrease with the increase in the number of mounting holes, the above structure can also improve the sealing performance of the outer shell; on the other hand, because the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, it needs to be fixedly connected to the outer shell, as the number of mounting holes increases, the complexity of the battery cell process will also increase, for example, it is necessary to process a step surface on the outer shell for each mounting hole, etc., which is costly, therefore, the above structure can also reduce The process complexity of the battery cell is reduced, and the cost is saved. Furthermore, the multiple connection parts of the insulation connection are integrated in the same mounting hole, which can reduce the area occupied by the mounting hole on the housing compared to setting a separate mounting hole without a connection part, thereby improving the compactness of the
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- Battery Mounting, Suspending (AREA)
Abstract
一种电池单体、电池和用电装置。其中,电池单体包括:外壳,包括壁部,壁部开设有连通外壳内部和外部的安装孔;采样组件,容纳于外壳内部;绝缘连接的多个连接部,设置在安装孔内,并封堵安装孔,多个连接部均与采样组件电连接。通过上述方式,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
Description
本申请要求于2023年07月03日提交的申请号为2023217073004,发明名称为“电池单体、电池和用电装置”的中国专利申请的优先权,其通过引用方式全部并入本申请。
本申请涉及电池技术领域,特别是涉及电池单体、电池和用电装置。
随着电池技术的发展,电池单体应用于越来越多的领域,并在汽车动力领域逐渐替代传统的石化能源。电池单体可存储有化学能并将化学能可控地转化为电能。在可循环利用的电池单体中,在放电后可通过充电的方式使活性物质激活而继续使用。
一般,电池单体包括外壳及容置在外壳内的电极组件、采样组件等,电极组件通过电极柱与外界电连接,采样组件通过连接柱与外界电连接。现有的电池单体的结构中,采样组件通常包括一个或多个连接柱,且当采样组件数量为多个时,连接柱的数量也随之增加。为了方便连接柱的安装,通常在外壳上开设多个安装孔,以通过将多个连接柱对应安装在多个安装孔处,来实现连接柱与外界的电连接。但这种结构会增加电池单体的结构强度失效的风险。
发明内容
鉴于上述问题,本申请提供电池单体、电池和用电装置,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
第一方面,本申请提供了一种电池单体,电池单体至少包括:外壳,包括壁部,壁部开设有连通外壳内部和外部的安装孔;采样组件,容纳于外壳内部;绝缘连接的多个连接部,设置在安装孔内,并封堵安装孔,多个连接部均与采样组件电连接。
通过上述方式,可以通过外壳上的同一个安装孔安装封堵该安装孔的绝缘连接的多个连接部,即通过一个安装孔实现绝缘连接的多个连接部的安装,能够减少外壳上的安装孔的数量。一方面,因外壳的强度会随着安装孔数量的增加而降低,因此上述结构能够增加外壳的强度,降低电池单体的结构强度失效的风险;另一方面,因外壳的密封性能也会随着安装孔数量的增加而降低,因此上述结构还能够提高外壳的密封性能;又一方面,因每个安装孔对应的连接柱需要安装在对应的安装孔处,即需要与外壳固定连接,随着安装孔数量的增加,还会增加电池单体工艺上的复杂度,例如需要在外壳上为每个安装孔加工台阶面等,成本较高,因此,上述结构还能够降低电池单体的工艺复杂度,节约成本。进一步地,将绝缘连接的多个连接部集成设置在同一个安装孔内,相较于为没有连接部设置独立的安装孔,能够减少安装孔在外壳上的占用面积,进而能够提高结构的紧凑性。
在一些实施例中,多个连接部包括沿预设轴线设置的第一连接部和沿第一连接部的周向环绕于第一连接部的至少部分外周的第二连接部。通过将第一连接部沿预设轴线设置,能够缩小绝缘连接的多个连接部在壁部上的占用面积,从而能够缩小安装孔的开孔面积,进而提高壁部的强度及密封性能;且在第一连接部的至少部分外周环绕设置第二连接部,能够缩小第二连接部与第一连接部之间的排布面积,从而能够进一步缩小安装孔的开孔面积,进而进一步提高壁部的强度及密封性
能;且能够提高结构的紧凑性。
在一些实施例中,第二连接部闭合环绕于第一连接部的外周。将第二连接部闭合环绕于第一连接部的外周,且第二连接部套设在第一连接部的外周,能够进一步缩小第二连接部及第一连接部在壁部的占用面积,从而能够缩小安装孔的开孔面积,进而提高壁部的强度及密封性能;且能够提高结构的紧凑性。且增加第二连接部的尺寸,提高电气性能。
在一些实施例中,第二连接部的数量为至少两个,至少两个第二连接部沿第一连接部的周向间隔设置。通过上述方式,可以实现至少三个连接部,且在第一连接部的至少部分外周环绕设置第二连接部,能够缩小第二连接部与第一连接部之间的排布面积,从而能够进一步缩小安装孔的开孔面积,进而进一步提高壁部的强度及密封性能,及提高结构的紧凑性。
在一些实施例中,连接部部分环绕预设轴线设置,且多个连接部沿预设轴线的周向彼此间隔。连接部部分环绕预设轴线设置,且多个连接部沿预设轴线的周向彼此间隔,能够使得多个连接部位于预设轴线外侧的同一圈外周,能够缩小多个连接部在壁部上的占用面积,从而能够缩小安装孔的开孔面积,能够提高外壳的强度及密封性能,及提高结构的紧凑性。
在一些实施例中,电池单体还包括:绝缘件,绝缘件设置于多个连接部之间。在相邻设置的连接部之间设置绝缘件,以改善多个连接部之间的干扰,如电信号干扰等,以提高电池单体的可靠性。
在一些实施例中,电池单体还包括固定件,连接部固定于固定件,固定件固定连接壁部。通过固定件实现连接部与壁部的之间的连接,能够提高连接部与壁部之间的稳定性,且能够减少安装工艺对连接部的损坏等问题。
在一些实施例中,固定件沿连接部的周向至少部分环绕固定于连接部的外周。将固定件设置在连接部的外周,能够便于将固定件设置在安装孔的内壁与连接部之间,使得固定件位于安装孔内,不仅能够增加安装孔的内壁与连接部之间的连接稳定性,而且还能够减少固定件对外壳内部或者外部结构的干扰。
在一些实施例中,安装孔包括彼此连通的第一孔段和第二孔段,第一孔段连通外壳外部,第二孔段连通外壳内部,第一孔段和第二孔段在两者的连接处形成朝向外壳外部的台阶面,固定件支撑于台阶面上。台阶面可限制固定件朝向外壳内部运动,第一孔段及第二孔段可限制固定件沿安装孔的径向的运动范围,有利于进行固定件的安装,也有利于在固定件进行安装之后使得固定件保持结构稳定。
在一些实施例中,固定件包括:沿预设轴线方向设置的固定段和插置段,插置段设置在第二孔段内,固定段设置在第一孔段内,且支撑于台阶面上。台阶面可限制固定段朝向外壳内部运动,第二孔段可限制固定段沿安装孔的径向的运动范围,第一孔段可限制插置段沿安装孔的径向的运动范围,从而便于进行固定件的安装。
在一些实施例中,电池单体还包括:密封圈,设置于固定段和台阶面之间,以提升固定段和台阶面之间的密封性能,进而提升电池单体的可靠性。
在一些实施例中,外壳包括壳体和端盖,壳体设置有开口端,端盖盖设于开口端,采样组件容置于壳体内部;端盖形成壁部;安装孔开设于端盖。通过将安装孔开设于端盖,有利于对安装孔进行封堵。
在一些实施例中,采样组件包括多个采样模块,每个采样模块连接至少一个连接部,可通过采样模块获取外壳内部的环境信息,以能够提高对电池单体工作状态进行管理的有效性,进而提高电池单体工作的稳定性。
在一些实施例中,电池单体还包括:电路板,设置在外壳外部,且与连接部电连接。通过
设置在外壳的外部的且与连接部电连接的电路板实现对采样组件获取到环境信息进行处理,以确定外壳内部的气体成分及浓度、温度或气压,从而对电池单体的工作状态进行分析。
在一些实施例中,电路板设置在壁部背离采样组件的一侧上。通过将电路板设置于壁部背离采样组件的一侧,即外壳的外部,便于进行电路板的安装与拆卸。壁部可阻碍电路板与电极组件和电解液相接触,降低电路板因与电极组件接触而短路的风险,同时降低电极组件和电解液对电路板的腐蚀。
第二方面,本申请提供了一种电池,包括上述电池单体。如此设置,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
在一些实施例中,电池还包括:电池管理单元,与连接部电连接。电池管理单元与连接部电连接,以使得电池管理单元根据采样组件获得的环境信息对电池单体进行自动化管理。
在一些实施例中,电池还包括:箱体,电池单体设置在箱体内;电路板,设置在箱体外部,且与连接部电连接。通过设置在箱体且与连接部电连接的电路板实现对采样组件获取到环境信息进行处理,以确定外壳内部的气体成分及浓度、温度或气压,从而对电池单体的工作状态进行分析。
第三方面,本申请提供了一种用电装置,包括上述电池。如此设置,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
通过阅读对下文优选实施方式的详细描述,各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的,而并不认为是对本申请的限制。而且在全部附图中,用相同的附图标号表示相同的部件。在附图中:
图1为根据一个或多个实施例的车辆的结构示意图;
图2为根据一个或多个实施例的电池的分解结构示意图;
图3为根据一个或多个实施例的电池单体的分解结构示意图;
图4为根据一个或多个实施例的电池单体的结构示意框图;
图5为图3所示电池单体的壁部、电极柱、连接部、塑胶件的结构示意图;
图6为图5所示结构的俯视结构示意图;
图7为图6所示结构沿A-A剖切线的截面的局部结构示意图;
图8为图7所示结构中结构B的放大结构示意图;
图9为根据一个或多个实施例的电池单体的另一结构示意图;
图10为根据一个或多个实施例的电池单体的又一结构示意图;
图11为根据一个或多个实施例的电池单体的再一结构示意图。
具体实施方式中的附图标号如下:
1000a车辆;
100a电池;200a控制器;300a马达;
10a箱体;11a第一部分;12a第二部分;
1电池单体;100外壳;101壁部;102安装孔;142第一孔段;122第二孔段;132台阶面;110壳体;111开口端;112开口;120端盖;152密封圈;200电极组件;201极耳;300线路板;400采样组件;500固定件;600塑胶件;700连接部;707绝缘基板;710第一连接部;720第二连接部;800绝缘件;900电极柱;F预设轴线。
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案,因此只作为示例,而不能以此来限制本申请的保护范围。
除非另有定义,本文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;本文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。
在本申请实施例的描述中,技术术语“第一”“第二”等仅用于区别不同对象,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中,“多个”的含义是两个及两个以上,除非另有明确具体的限定。
在本文中提及“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。本领域技术人员显式地和隐式地理解的是,本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中,术语“多个”指的是两个以上(包括两个),同理,“多组”指的是两组以上(包括两组),“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中,技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请实施例和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中,除非另有明确的规定和限定,技术术语“安装”“相连”“连接”“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;也可以是机械连接,也可以是电连接;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或两个元件的相互作用关系。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实施例中的具体含义。
随着电池技术的发展,电池单体应用于越来越多的领域,并在汽车动力领域逐渐替代传统的化石能源。电池单体可存储有化学能并将化学能可控地转化为电能。在可循环利用的电池单体中,在放电后可通过充电的方式使活性物质激活而继续使用。
一般,电池单体包括外壳及容置在外壳内的电极组件、采样组件等,电极组件通过电极柱与外界电连接,采样组件通过连接柱与外界电连接。现有的电池单体的结构中,采样组件通常包括一个或多个连接柱,且当采样组件数量为多个时,连接柱的数量也随之增加。为了方便连接柱的安装,通常在外壳上开设多个安装孔,以通过将多个连接柱对应安装在多个安装孔处,来实现连接柱与外界的电连接。但一方面,外壳的强度会随着安装孔数量的增加而降低,随着安装孔数量的增加,会增加电池单体的结构强度失效的风险;另一方面,外壳的密封性能也会随着安装孔数量的增
加而降低;又一方面,因每个安装孔对应的连接柱需要安装在对应的安装孔内,即需要与外壳固定连接,随着安装孔数量的增加,还会增加电池单体工艺上的复杂度,成本较高。
进一步地,在电池单体在使用过程中,特别是在二次电池的使用过程中,多次经历充放电循环,存在副反应,电池单体内部会持续产生气体,或者外壳内的电极组件产生膨胀现象,使外壳内部存在一定的气压,会进一步增加电池单体的结构强度失效的风险。
基于以上考虑,本申请提供电池单体、电池和用电装置。其中,电池单体包括外壳,包括壁部,壁部开设有连通外壳内部和外部的安装孔;采样组件,容纳于外壳内部;绝缘连接的多个连接部,设置在安装孔内,并封堵安装孔,多个连接部均与采样组件电连接。如此,可以通过外壳上的同一个安装孔安装封堵该安装孔的绝缘连接的多个连接部,即通过一个安装孔实现绝缘连接的多个连接部的安装,能够减少外壳上的安装孔的数量,进而能够降低电池单体的结构强度失效的风险,提高外壳的密封性能,及降低电池单体的工艺复杂度,节约成本,且还能够提高结构的紧凑性。
本申请实施例公开的电池单体、电池和用电装置可以用于使用电池作为电源的用电装置或者使用电池作为储能元件的各种储能系统。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1000a为例进行说明。
请参照图1,车辆1000a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1000a的内部设置有电池100a,电池100a可以设置在车辆1000a的底部或头部或尾部。电池100a可以用于车辆1000a的供电,例如,电池100a可以作为车辆1000a的操作电源。车辆1000a还可以包括控制器200a和马达300a,控制器200a用来控制电池100a为马达300a供电,例如,用于车辆1000a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100a不仅可以作为车辆1000a的操作电源,还可以作为车辆1000a的驱动电源,代替或部分地代替燃油或天然气为车辆1000a提供驱动动力。
在一些实施例中,电池100a可以为储能装置。储能装置包括储能集装箱、储能电柜等。
本申请的实施例所提到的电池100a是指包括一个或多个电池单体1以提供更高的电压和容量的单一的物理模块。
本申请实施例中,电池单体1可以为二次电池,二次电池是指在电池单体1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1。每个电池单体1也可以为一次电池。
电池单体1包括但不限于锂离子电池、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。电池单体1可呈圆柱体、扁平体、长方体或其它形状等。
在一些实施例中,电池100a可以为电池模块,电池单体1有多个时,多个电池单体1排列并固定形成一个电池模块。
在一些实施例中,请参照图2,电池100a可以为电池包,电池包包括箱体10a和电池单体1,电池单体1或电池模块容纳于箱体10a中。
在一些实施例中,箱体10a可以作为车辆1000a的底盘结构的一部分。例如,箱体10a的部分可以成为车辆1000a的地板的至少一部分,或者,箱体10a的部分可以成为车辆1000a的横梁
和纵梁的至少一部分。
请参照图2,电池100a包括箱体10a和电池单体1,电池单体1容纳于箱体10a内。其中,箱体10a用于为电池单体1提供容纳空间,箱体10a可以采用多种结构。在一些实施例中,箱体10a可以包括第一部分11a和第二部分12a,第一部分11a与第二部分12a相互盖合,第一部分11a和第二部分12a共同限定出用于容纳电池单体1的容纳空间。第二部分12a可以为一端开口的空心结构,第一部分11a可以为板状结构,第一部分11a盖合于第二部分12a的开口侧,以使第一部分11a与第二部分12a共同限定出容纳空间;第一部分11a和第二部分12a也可以是均为一侧开口的空心结构,第一部分11a的开口侧盖合于第二部分12a的开口侧。当然,第一部分11a和第二部分12a形成的箱体10a可以是多种形状,比如,圆柱体、长方体等。
在电池100a中,电池单体1可以是多个,多个电池单体1之间可串联或并联或混联,混联是指多个电池单体1中既有串联又有并联。多个电池单体1之间可直接串联或并联或混联在一起,再将多个电池单体1构成的整体容纳于箱体10a内;当然,电池100a也可以是多个电池单体1先串联或并联或混联组成电池模块形式,多个电池模块再串联或并联或混联形成一个整体,并容纳于箱体10a内。电池100a还可以包括其他结构,例如,该电池100a还可以包括汇流部件,用于实现多个电池单体1之间的电连接。
请参照图3,电池单体1是指组成电池的最小单元。在本实施例中,以圆柱形电池单体1为例来进行描述。如图3,电池单体1包括有外壳100以及电极组件200以及其他的功能性部件。
在一些实施方式中,外壳100用于封装电极组件200及电解质等部件。外壳100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。
外壳100可包括端盖120和壳体110。端盖120是指盖合于壳体110的开口处以将电池单体1的内部环境隔绝于外部环境的部件。不限地,端盖120的形状可以与壳体110的形状相适应以配合壳体110。可选地,端盖120可以由具有一定硬度和强度的材质(如铝合金)制成,这样,端盖120在受挤压碰撞时就不易发生形变,使电池单体1能够具备更高的结构强度,安全性能也可以有所提高。端盖120上可以设置有如电极柱900等的功能性部件。电极柱900可以用于与电极组件200电连接,以用于输出或输入电池单体1的电能。在一些实施例中,端盖120上还可以设置有用于在电池单体1的内部压力或温度达到阈值时泄放内部压力的泄压机构。端盖120的材质也可以是多种的,比如,包括但不限于铜、铁、铝、不锈钢、铝合金、塑胶等。在一些实施例中,在端盖120的内侧还可以设置有绝缘部件,绝缘部件可以用于隔离壳体110内的电连接部件与端盖120,以降低短路的风险。示例性的,绝缘部件可以是塑料、橡胶等。
壳体110是用于配合端盖120以形成电池单体1的内部环境的组件,其中,形成的内部环境可以用于容纳电极组件200、电解液以及其他部件。壳体110和端盖120可以是独立的部件,可以于壳体110上设置开口112,通过在开口112处使端盖120盖合开口112以形成电池单体1的内部环境。不限地,也可以使端盖120和壳体110一体化,具体地,端盖120和壳体110可以在其他部件入壳前先形成一个共同的连接面,当需要封装壳体110的内部时,再使端盖120盖合壳体110。壳体110可以是多种形状和多种尺寸的,例如长方体形、圆柱体形、六棱柱形等。具体地,壳体110的形状可以根据电极组件200的具体形状和尺寸大小来确定。壳体110的材质可以是多种,比如,包括但不限于铜、铁、铝、不锈钢、铝合金、塑胶等。
电极组件200是电池单体1中发生电化学反应的部件。壳体110内可以包含一个或更多个电极组件200。
在一些实施例中,电极组件200包括正极、负极以及隔离件。在电池单体1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,可采用银表面处理的铝或不锈钢、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,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、用碳、镍或钛等。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金、或泡沫碳等。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1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200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。本申请对隔离膜的种类没有特别的限制,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,隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯及聚偏二氟乙烯,陶瓷中的至少一种。隔离膜可以是单层薄膜,也可以是多层复合薄膜,没有特别限制。在隔离膜为多层复合薄膜时,各层的材料可以相同或不同,没有特别限制。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1还包括电解质,电解质在正、负极之间起到传导离子的作用。本申请对电解质的种类没有具体的限制,可根据需求进行选择。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,电解质盐可选自六氟磷酸锂、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,溶剂可选自碳酸亚乙酯、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为氧化物固体电解质(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200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200设有极耳201,极耳可以将电流从电极组件200导出。极耳包括正极耳和负极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池100a的充放电过程中,正极活性物质和负极活性物质与电解液发生反应,极耳201连接电极柱900以形成电流回路。
根据本申请的一些实施例,如图3至图8所示,本申请电池单体1实施例所描述的电池单体1包括外壳100、采样组件400及绝缘连接的多个连接部700。外壳100包括壁部101,壁部101开设有连通外壳100内部和外部的安装孔102;采样组件400容纳于外壳100内部;绝缘连接的多个连接部700设置在安装孔102内,并封堵安装孔102,多个连接部700均与采样组件400电连接。
具体地,多个连接部700集成一体,直接或通过绝缘件封堵安装孔102。连接部700沿着安装孔102的轴向延伸,以连接设置在外壳100内采样组件400,并实现采样组件400与外壳100
外的器件进行电传输。
其中,连接部700是指用于实现电连接的部件或结构部,连接部700可以包括金属部等导电部。
连接部700的尺寸、形状及数量可以依据采样组件400及电池单体1的尺寸、电参数等要求进行设置。
可选地,绝缘连接的多个连接部700的外轮廓形状或者其外侧的绝缘件的外轮廓形状和安装孔102的形状相匹配,使得安装孔102用于对绝缘连接的多个连接部700进行安装定位。
采样组件400用于获取外壳100内部的环境信息,基于该环境信息产生电信号,该电信号通过连接部700传送至外壳100外的器件。
通过上述方式,可以通过外壳100上的同一个安装孔102安装封堵该安装孔102的绝缘连接的多个连接部700,即通过一个安装孔102实现绝缘连接的多个连接部700的安装,能够减少外壳上的安装孔102的数量。一方面,因外壳100的强度会随着安装孔102数量的增加而降低,因此上述结构能够增加外壳100的强度,降低电池单体1的结构强度失效的风险;另一方面,因外壳100的密封性能也会随着安装孔102数量的增加而降低,因此上述结构还能够提高外壳100的密封性能;又一方面,因每个安装孔对应的连接柱需要安装在对应的安装孔处,即需要与外壳固定连接,随着安装孔102数量的增加,还会增加电池单体1工艺上的复杂度,例如需要在外壳100上为每个安装孔102加工台阶面等,成本较高,因此,上述结构还能够降低电池单体1的工艺复杂度,节约成本。进一步地,将绝缘连接的多个连接部700集成设置在同一个安装孔102内,相较于为没有连接部700设置独立的安装孔102,能够减少安装孔102在外壳上的占用面积,进而能够提高结构的紧凑性。
当然,电池单体1还包括电极组件200,电极组件200容纳于外壳100内部,具体介绍可以参阅上文。
在一些实施例中,多个连接部700包括沿预设轴线F设置的第一连接部710和沿第一连接部710的周向环绕于第一连接部710的至少部分外周的第二连接部720。
具体地,沿预设轴线F设置是指沿预设轴线F延伸设置,即第一连接部710的轴线与预设轴线F重合或者平行,且预设轴线F从第一连接部710内部穿过;预设轴线F是多个连接部700集成设置形成的连接体的轴线,该连接体可以呈柱状等形状设置。在连接部700与壁部101垂直设置时,预设轴线F也可以是安装孔102的轴线。预设轴线F的周向是指与预设轴线F垂直且环绕预设轴线F的方向。
通过将第一连接部710沿预设轴线F设置,能够缩小绝缘连接的多个连接部700在壁部101上的占用面积,从而能够缩小安装孔102的开孔面积,进而提高壁部101的强度及密封性能;且在第一连接部710的至少部分外周环绕设置第二连接部720,能够缩小第二连接部720与第一连接部710之间的排布面积,从而能够进一步缩小安装孔102的开孔面积,进而进一步提高壁部101的强度及密封性能;且能够提高结构的紧凑性。
可以根据外壳100内部采样组件400的结构要求及性能要求设置第二连接部的数量,可以根据采样组件400的结构要求及性能要求、安装孔102的开孔面积等来设置第二连接部的具体位置及尺寸。
在一些实施例中,第二连接部720闭合环绕于第一连接部710的外周。
将第二连接部720闭合环绕于第一连接部710的外周,且第二连接部720套设在第一连接部710的外周,能够进一步缩小第二连接部720及第一连接部710在壁部101的占用面积,从而能够缩小安装孔102的开孔面积,进而提高壁部101的强度及密封性能;且能够提高结构的紧凑性。
且增加第二连接部720的尺寸,提高电气性能。
在一些实施例中,如图9所示,第二连接部720的数量为至少两个,至少两个第二连接部720沿第一连接部710的周向间隔设置。
通过上述方式,可以实现至少三个连接部700,且在第一连接部710的至少部分外周环绕设置第二连接部720,能够缩小第二连接部720与第一连接部710之间的排布面积,从而能够进一步缩小安装孔102的开孔面积,进而进一步提高壁部101的强度及密封性能,及提高结构的紧凑性。
例如,第一连接部710设置在预设轴线F上,两个第二连接部720沿第一连接部710的周向间隔设置。
本申请的实施例不限定多个第二连接部720的尺寸及排布是否均匀。
在其它实施例中,第二连接部可以是三个或三个以上,且可以位于第一连接部的同一圈外周,或者第一连接部的多个不同圈外周。
多个第二连接部位于同一圈外周是指多个第二连接部到第一连接部的距离相等。
在一些实施例中,如图10所示,连接部700部分环绕预设轴线F设置,且多个连接部700沿预设轴线F的周向彼此间隔。
连接部700部分环绕预设轴线F设置,且多个连接部700沿预设轴线F的周向彼此间隔,能够使得多个连接部700位于预设轴线F外侧的同一圈外周,能够缩小多个连接部700在壁部101上的占用面积,从而能够缩小安装孔702的开孔面积,能够提高外壳100的强度及密封性能,及提高结构的紧凑性。
在其它实施例中,多个沿周向设置的连接部可以位于同一圈外周上,也可以位于不同圈的外周上,或者部分位于同一圈外周上。
在一些实施例中,如图3至图10所示,电池单体1还包括:绝缘件800,绝缘件800设置于多个连接部700之间。
在相邻设置的连接部700之间设置绝缘件800,以改善多个连接部700之间的干扰,如电信号干扰等,以提高电池单体1的可靠性。
绝缘件800可以包括塑胶件等。塑胶材质便于塑胶件的成型。或者绝缘件800可以包括散热更好的绝缘件,如陶瓷等。
在一些实施例中,连接部700与绝缘件800一体注塑设置。通过这种方式,能够提高连接部700与绝缘件800之间的连接稳定性,从而提高电池单体1的可靠性,且能够简化连接部700与绝缘件800之间的安装工艺,进一步降低电池单体1的工艺复杂度。
在一些实施例中,如图3至图8所示,电池单体1还包括固定件500,连接部700固定于固定件500,固定件500固定连接壁部101。
通过固定件500实现连接部700与壁部101的之间的连接,能够提高连接部700与壁部101之间的稳定性,且能够减少安装工艺对连接部700的损坏等问题。
在一些实施例中,固定件500沿连接部700的周向至少部分环绕固定于连接部700的外周。
将固定件500设置在连接部700的外周,能够便于将固定件500设置在安装孔102的内壁与连接部700之间,使得固定件500位于安装孔102内,不仅能够增加安装孔102的内壁与连接部700之间的连接稳定性,而且还能够减少固定件500对外壳100内部或者外部结构的干扰。
可选地,固定件500可以是金属支架,金属支架上设有安装孔,将连接部700安装在该安装孔内,利用金属支架作为连接部700的固定件500,与壁部101连接,能够提高连接稳定性,因为金属支架可以采用例如焊接、铆接等稳定性较好的连接方式与壁部101连接,从而可以提高电池单体1的可靠性。
还可以在安装孔102的内壁与设置另一绝缘件,以实现金属支架与连接部700之间的绝缘隔离,提高电池单体1的可靠性。
在一些实施例中,如图9所示,电池单体1还包括绝缘基板707,绝缘基板707盖设于金属支架背离外壳100内部的一侧,绝缘基板707设有与安装孔102对应设置且连通的另一安装孔,连接部700嵌设在对应的安装孔102及绝缘基板707上的安装孔。一方面,可以增加金属支架的强度;另一方面,绝缘基板707对金属支架具有电、液等隔离作用,及缓冲作用,能够减少金属支架受损或者被干扰的问题。
绝缘基板707可以包括塑胶基板等。塑胶材质便于塑胶基板的成型。或者绝缘基板707可以包括散热更好的绝缘基板,如陶瓷基板。
在一些实施例中,金属支架与壁部101焊接固定。焊接过程可形成熔融体,熔融体固化后可连接金属支架与壁部101,能够提高金属支架与壁部101之间的稳定性,进而提高电池单体1的可靠性。
在一些实施例中,如图9所示,安装孔102包括彼此连通的第一孔段142和第二孔段122,第一孔段142连通外壳100外部,第二孔段122连通外壳100内部,第一孔段142和第二孔段122在两者的连接处形成朝向外壳外部的台阶面132,固定件500支撑于台阶面132上。
台阶面132可限制固定件500朝向外壳100内部运动,第一孔段142及第二孔段122可限制固定件500沿安装孔102的径向的运动范围,有利于进行固定件500的安装,也有利于在固定件500进行安装之后使得固定件500保持结构稳定。
安装孔102的轴向是指安装孔102朝向外壳100内部的一端和背离外壳100内部的一端之间的间隔方向,安装孔102的径向垂直于安装孔102的轴向。
在一些实施例中,固定件500包括:沿预设轴线F方向设置的固定段和插置段,插置段设置在第二孔段122内,固定段设置在第一孔段142内,且支撑于台阶面132上。
台阶面132可限制固定段朝向外壳100内部运动,第二孔段122可限制固定段沿安装孔102的径向的运动范围,第一孔段142可限制插置段沿安装孔102的径向的运动范围,从而便于进行固定件500的安装。
可选地,固定段与壁部101可通过焊接方式连接。
在一些实施例中,电池单体1还包括:密封圈152,设置于固定段和台阶面132之间,以提升固定段和台阶面132之间的密封性能,进而提升电池单体1的可靠性。
在一些实施例中,连接部700可以包括多个信号部,信号部与采样组件400电连接。
在一些实施例中,连接部700也可以包括两个供电部及至少一个信号部,电池单体1包括两个电极柱900,两个电极柱900设置于壁部101,并延伸至外壳100外部;两个供电部在外壳100外部与两个电极柱900对应电连接,以为采样组件400进行供电。
通过连接部700在外壳100外与电极柱900,并通过连接部为外壳100内部采样组件400供电,能够减少外壳100内部的供电线路结构,便于维护及提高电池单体1安全性。
在一些实施例中,如图3所示,外壳100包括壳体110和端盖120,壳体110设置有开口
端111,端盖120盖设于开口端111,采样组件400、电极组件200容置于壳体110内部。端盖120形成壁部101。安装孔102开设于端盖120。
开口端111可开设有上述开口112。通过将安装孔102开设于端盖120,有利于对安装孔102进行封堵。
可选地,可以将采样组件400设置于端盖120的内侧,便于进行采样组件400的安装及对外壳100内部的环境进行采集。
可选地,可以通过注塑或粘贴等方式将采样组件400设置于端盖120的内侧连接,或者与外壳100内的其它部件连接,以便于采样组件400的走线。
端盖120可起到对两个电极柱900定位的作用。电极柱900可与端盖120相对固定。
具体来说,电极柱900的一端朝向外壳100内部设置,并可用于电连接设置于外壳100内的电极组件200,电极柱900的另一端朝向外壳100外部设置并可连接外界和电路板300,从而电极组件200可通过电极柱900分别为外界和电路板300供电。
进一步地,电极组件200可通过电极柱900实现充电。
在另一些实施例中,壳体110可形成壁部101。安装孔102可开设于壳体110,例如,开设于壳体110的底壁,壳体110的底壁与开口端111相对设置。如此设置,可增加连接部700的可安装区域。
在一些实施例中,采样组件400包括多个采样模块,每个采样模块连接至少一个连接部700。
采样模块用于对外壳100内部的环境进行采样。在电池单体1的使用过程中,外壳100的内部常常处于动态地变化过程,例如电极组件200可发生体积的膨胀,又例如外壳100内部的温度和压力会发生变化,或外壳100内部有气体的生成。可通过采样模块获取外壳100内部的环境信息,例如对外壳100内部的气体、温度或气压进行采样,以能够提高对电池单体1工作状态进行管理的有效性,进而提高电池单体1工作的稳定性。
采样模块连接的连接部700的数量可以根据采样模块的类型及结构要求进行设置。
在一些实施例中,采样组件400可以包括一个采样模块,其设有多个信号端,该多个信号端可以分别与多个连接部700电连接;或者采样组件400包括多个采样模块,每个采样模块可以设有单个或者多个信号端,以与单个或者多个连接部700连接。
在一些实施例中,采样组件400可以包括气压采样模块、气体采样模块或者温度采样模块中的一者或者多者。
气压采样模块可用于检测外壳100内的气压。在电池单体1的工作过程中会发生气压的变化,例如外壳100内部产生气体或温度升高导致气压快速升高。可以通过气压采样模块检测外壳100内部的气压,有利于对电池单体1的工作状态进行管理。
温度采样模块可用于检测外壳100内的温度。在电池单体1的工作过程中会发生温度的变化,例如温度升高。通过温度采样模块检测外壳100内部的温度,有利于对电池单体1的工作状态进行管理。
气体采样模块可用于检测外壳100内的气体类型,有利于对电池单体1的工作状态进行管理。
可选地,上述采样模块可以设置在封装壳内,且封装壳与端盖120连接,以提高采样模块的可靠性。
封装壳可对采样模块起到保护作用。一方面封装壳可减少外壳100外部的因素对采样模块的破坏,另一方面封装壳可阻隔于采样模块与电极组件200和电解液之间,从而减少外壳100内部的电解液和电极组件200对采样模块的腐蚀,以及减少采样模块与电极组件200直接接触而发生短路的风险。
可选地,封装壳可以与端盖120焊接固定。
在一些实施例中,如图3、图5所示,电池单体1还包括位于电极组件200与壁部101的塑胶件600。
塑胶件600为塑胶材质,塑胶材质便于塑胶件600的成型。
进一步地,塑胶件600为绝缘材质,可在电极组件200与壁部101之间形成绝缘,从而限制电流直接由电极组件200流入壁部101或直接由壁部101流入电极组件200。
在一些实施例中,如图11所示,电池单体1还包括电路板300,电路板300设置于外壳100的外部,且与连接部700电连接。
通过设置在外壳100的外部的且与连接部700电连接的电路板300实现对采样组件400获取到环境信息进行处理,以确定外壳100内部的气体成分及浓度、温度或气压,从而对电池单体1的工作状态进行分析。
在一些实施例中,电路板300设置在壁部101背离采样组件400的一侧上,即壁部101背离外壳100内部的一侧。
通过将电路板300设置于壁部101背离采样组件400的一侧,即外壳100的外部,便于进行电路板300的安装与拆卸。壁部101可阻碍电路板300与电极组件200和电解液相接触,降低电路板300因与电极组件200接触而短路的风险,同时降低电极组件200和电解液对电路板300的腐蚀。
在一些实施例中,电池单体1还包括处理器,处理器设置于电路板300,并连接部700电连接。
处理器能够对采样组件400所采样的环境信息进行处理,使得电池单体1能够实现智能化。例如,处理器可根据采样组件400获取到的环境信息确定外壳100内部的气体成分及浓度、温度或气压,从而对电池单体1的工作状态进行分析。
处理器可能是一种集成电路芯片,具有信号的处理能力。处理器还可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
例如,处理器为MCU。通过将处理器设置于电路板300,可提高处理器与电路板300之间的连接稳定性,进而提高处理器与采样组件400的连接稳定性。
电路板300背离外壳100内部的一侧的空间较为宽敞,可以将处理器设置于电路板300背离外壳100内部的一侧,有利于处理器进行散热。
在一些实施例中,如图3至图8所示,电池单体1包括外壳100、采样组件400及绝缘连接的多个连接部700。外壳100包括端盖120,端盖120开设有连通外壳100内部和外部的安装孔102;采样组件400容纳于外壳100内部;绝缘连接的多个连接部700设置在安装孔102内,并封堵安装孔102,多个连接部700均与采样组件400电连接。
其中,多个连接部700包括沿预设轴线F设置的第一连接部710和沿第一连接部710的周
向环绕于第一连接部710的至少部分外周的第二连接部720,第二连接部720闭合环绕于第一连接部710的外周。
进一步地,电池单体1还包括:绝缘件800、固定件500、绝缘基板707、密封圈152;其中,绝缘件800设置于多个连接部700之间。连接部700固定于固定件500,固定件500固定连接端盖120。绝缘基板707盖设于固定件500背离外壳100内部的一侧,绝缘基板707设有与安装孔102对应设置且连通的另一安装孔,连接部700嵌设在对应的安装孔102及绝缘基板707上的安装孔。密封圈152设置于固定段和台阶面132之间。电池单体1还包括位于电极组件200与壁部101的塑胶件600。
其中,安装孔102包括彼此连通的第一孔段142和第二孔段122,第一孔段142连通外壳100外部,第二孔段122连通外壳100内部,第一孔段142和第二孔段122在两者的连接处形成朝向外壳外部的台阶面132,固定件500支撑于台阶面132上。固定件500包括沿预设轴线F方向设置的固定段和插置段,插置段设置在第二孔段122内,固定段设置在第一孔段142内,且支撑于台阶面132上。
在其他实施例中,多个连接部还可以以绕预设轴线F的周向延伸拼接的方式设置;或者一个连接部沿预设轴线F设置,其它连接部绕该连接部的外周延伸拼接设置;多个连接部可以按一圈外周排布或者沿径向层叠的多圈外周设置。
在一些实施例中,如图2所示,电池100a包括上述电池单体1。如此设置,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
在一些实施例中,电池100a还包括电池管理单元,与连接部700电连接。电池管理单元与连接部700电连接,以使得电池管理单元根据采样组件400获得的环境信息对电池单体1进行自动化管理,如对采样组件400获取到环境信息进行处理,以确定外壳100内部的气体成分及浓度、温度或气压,从而对电池单体1的工作状态进行分析。
在一些实施例中,电池100a还包括箱体10a及电路板300,电池单体1设置在箱体10a内;电路板300设置在述箱体10a外部,且与连接部700电连接。
通过设置在箱体10a且与连接部700电连接的电路板300实现对采样组件400获取到环境信息进行处理,以确定外壳100内部的气体成分及浓度、温度或气压,从而对电池单体1的工作状态进行分析。
通过将电路板300设置于箱体10a背离外壳100内部的一侧,便于进行电路板300的安装与拆卸。箱体10a可阻碍电路板300与电极组件200和电解液相接触,降低电路板300因与电池单体1接触而短路的风险,同时降低电池单体1对电路板300的干扰。
在一些实施例中,如图1所示,用电装置包括上述电池100a。如此设置,能够减小电池单体的外壳上的开孔数量,以提高其强度,降低其结构强度失效风险,且能够简化工艺,节约成本;进一步地,还能够缩小开孔的占用空间,提高结构的紧凑性。
综上所述,本申请的实施例可以通过外壳上的同一个安装孔安装封堵该安装孔的绝缘连接的多个连接部,即通过一个安装孔实现绝缘连接的多个连接部的安装,能够减少外壳上的安装孔的数量。一方面,因外壳的强度会随着安装孔数量的增加而降低,因此上述结构能够增加外壳的强度,降低电池单体的结构强度失效的风险;另一方面,因外壳的密封性能也会随着安装孔数量的增加而降低,因此上述结构还能够提高外壳的密封性能;又一方面,因每个安装孔对应的连接柱需要安装在对应的安装孔处,即需要与外壳固定连接,随着安装孔数量的增加,还会增加电池单体工艺上的复杂度,例如需要在外壳上为每个安装孔加工台阶面等,成本较高,因此,上述结构还能够降
低电池单体的工艺复杂度,节约成本。进一步地,将绝缘连接的多个连接部集成设置在同一个安装孔内,相较于为没有连接部设置独立的安装孔,能够减少安装孔在外壳上的占用面积,进而能够提高结构的紧凑性。
最后应说明的是:以上各实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述各实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的范围,其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是,只要不存在结构冲突,各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例,而是包括落入权利要求的范围内的所有技术方案。
Claims (19)
- 一种电池单体,其特征在于,至少包括:外壳,包括壁部,所述壁部开设有连通所述外壳内部和外部的安装孔;采样组件,容纳于所述外壳内部;绝缘连接的多个连接部,设置在所述安装孔内,并封堵所述安装孔,所述多个连接部均与所述采样组件电连接。
- 根据权利要求1所述的电池单体,其特征在于,所述多个连接部包括沿预设轴线设置的第一连接部和沿所述第一连接部的周向环绕于所述第一连接部的至少部分外周的第二连接部。
- 根据权利要求2所述的电池单体,其特征在于,所述第二连接部闭合环绕于所述第一连接部的外周。
- 根据权利要求2所述的电池单体,其特征在于,所述第二连接部的数量为至少两个,至少两个所述第二连接部沿所述第一连接部的周向间隔设置。
- 根据权利要求1所述的电池单体,其特征在于,所述连接部部分环绕预设轴线设置,且所述多个连接部沿所述预设轴线的周向彼此间隔。
- 根据权利要求1至5任一项所述的电池单体,其特征在于,所述电池单体还包括:绝缘件,绝缘件设置于所述多个连接部之间。
- 根据权利要求1至5任一项所述的电池单体,其特征在于,所述电池单体还包括固定件,所述连接部固定于所述固定件,所述固定件固定连接所述壁部。
- 根据权利要求7所述的电池单体,其特征在于,所述固定件沿所述连接部的周向至少部分环绕固定于所述连接部的外周。
- 根据权利要求7所述的电池单体,其特征在于,所述安装孔包括彼此连通的第一孔段和第二孔段,所述第一孔段连通所述外壳外部,所述第二孔段连通所述外壳内部,所述第一孔段和所述第二孔段在两者的连接处形成朝向所述外壳外部的台阶面,所述固定件支撑于所述台阶面上。
- 根据权利要求9所述的电池单体,其特征在于,所述固定件包括:沿预设轴线方向设置的固定段和插置段,所述插置段设置在所述第二孔段内,所述固定段设置在所述第一孔段内,且支撑于所述台阶面上。
- 根据权利要求10所述的电池单体,其特征在于,所述电池单体还包括:密封圈,设置于所述固定段和所述台阶面之间。
- 根据权利要求1所述的电池单体,其特征在于,所述外壳包括壳体和端盖,所述壳体设置有开口端,所述端盖盖设于所述开口端,所述采样组件容置于所述壳体内部;所述端盖形成所述壁部;所述安装孔开设于所述端盖。
- 根据权利要求1所述的电池单体,其特征在于,所述采样组件包括多个采样模块,每个所述采样模块连接至少一个所述连接部。
- 根据权利要求1所述的电池单体,其特征在于,所述电池单体还包括:电路板,设置在所述外壳外部,且与所述连接部电连接。
- 根据权利要求14所述的电池单体,其特征在于,所述电路板设置在所述壁部背离所述采样组件的一侧上。
- 一种电池,其特征在于,包括权利要求1至15任一项所述的电池单体。
- 根据权利要求16所述的电池,其特征在于,所述电池还包括:电池管理单元,与所述连接部电连接。
- 根据权利要求16所述的电池,其特征在于,所述电池还包括:箱体,所述电池单体设置在所述箱体内;电路板,设置在所述箱体外部,且与所述连接部电连接。
- 一种用电装置,其特征在于,包括权利要求16-18任一项所述的电池。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258182A (zh) * | 2020-02-12 | 2021-08-13 | 比亚迪股份有限公司 | 电池、电池模组、电池包及电动车 |
| CN113328159A (zh) * | 2020-02-12 | 2021-08-31 | 比亚迪股份有限公司 | 电池、电池模组、电池包及电动车 |
| CN217719885U (zh) * | 2022-07-21 | 2022-11-01 | 宁德时代新能源科技股份有限公司 | 电池及用电装置 |
| CN115832552A (zh) * | 2022-10-20 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | 电池单体和具有其的电池及用电装置 |
| CN219203257U (zh) * | 2023-03-15 | 2023-06-16 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258182A (zh) * | 2020-02-12 | 2021-08-13 | 比亚迪股份有限公司 | 电池、电池模组、电池包及电动车 |
| CN113328159A (zh) * | 2020-02-12 | 2021-08-31 | 比亚迪股份有限公司 | 电池、电池模组、电池包及电动车 |
| CN217719885U (zh) * | 2022-07-21 | 2022-11-01 | 宁德时代新能源科技股份有限公司 | 电池及用电装置 |
| CN115832552A (zh) * | 2022-10-20 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | 电池单体和具有其的电池及用电装置 |
| CN219203257U (zh) * | 2023-03-15 | 2023-06-16 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电装置 |
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