WO2024055144A1 - Adapter component, battery cell, battery and electric device - Google Patents

Adapter component, battery cell, battery and electric device Download PDF

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Publication number
WO2024055144A1
WO2024055144A1 PCT/CN2022/118347 CN2022118347W WO2024055144A1 WO 2024055144 A1 WO2024055144 A1 WO 2024055144A1 CN 2022118347 W CN2022118347 W CN 2022118347W WO 2024055144 A1 WO2024055144 A1 WO 2024055144A1
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WO
WIPO (PCT)
Prior art keywords
terminal
tab
connection part
adapter component
battery
Prior art date
Application number
PCT/CN2022/118347
Other languages
French (fr)
Chinese (zh)
Inventor
陈圣旺
郭志君
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/118347 priority Critical patent/WO2024055144A1/en
Publication of WO2024055144A1 publication Critical patent/WO2024055144A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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 belongs to the field of battery technology, and in particular relates to an adapter component, a battery cell, a battery and an electrical device.
  • Battery cells are systems that can be combined with each other to harness new renewable energy.
  • Embodiments of the present application provide an adapter component, a battery cell, a battery and a power device, which can improve the docking accuracy between the adapter component and electrode terminals and/or tabs, thereby improving battery quality.
  • a first aspect of the embodiment of the present application provides an adapter component for a battery cell, which includes a tab connection part, a terminal connection part and a bending part.
  • the tab connection portion is used to connect the tabs of the battery cells
  • the terminal connection portion is used to connect the electrode terminals of the battery cells.
  • the tab connection portion and The terminal connecting portion is disposed in an offset position, and the bending portion connects the tab connecting portion and the terminal connecting portion.
  • the bent portion is inclined from the tab connecting portion toward the terminal connecting portion.
  • the tab connecting portion and the terminal connecting portion can be relatively far apart, so that the plurality of adapter components have greater clearance when stacked.
  • the space can accommodate the terminal connection parts and tab connection parts with different heights in the thickness direction, reduce the position difference between the upper and lower transfer parts in the stacking direction, and reduce the difference in the stacking position of the transfer parts, resulting in the transfer parts and Reduction in accuracy of connection between electrode terminals and/or lugs.
  • the angle between the bending portion and the thickness direction is ⁇ , which satisfies 30° ⁇ 60°.
  • the terminal connecting portion, the bending portion, and the tab connecting portion are arranged in sequence along a first direction, and the first direction is perpendicular to the thickness direction.
  • the terminal connection part can be relatively far away from the tab connection part, thereby reducing mutual interference between the terminal connection part and the tab connection part.
  • the thickness of the terminal connection part is D1
  • the thickness of the tab connection part is D2
  • the thickness of the bending part is D3, satisfying D1 ⁇ D3 ⁇ D2.
  • the tab connection part can be made thicker, which facilitates the connection between the tab connection part and the tab.
  • the thickness of the terminal connection part is also made thin, which facilitates the connection between the terminal connection part and the electrode terminal.
  • the thickness can be made thickest at the bending part, thereby improving the connection strength between the tab connection part and the terminal connection part.
  • the thickness of the terminal connection part is D1
  • the thickness of the tab connection part is D2
  • the thickness of the bending part is D3, satisfying 0.3mm ⁇ D1 ⁇ D3 ⁇ D2 ⁇ 3mm.
  • the tab connection part and the terminal connection part can have a certain thickness to satisfy the requirements between the tab connection part and the tab.
  • the connection between the terminal connection part and the electrode terminal is required.
  • it can prevent the thickness of the tab connection part, the terminal connection part and the bending part from being too large, occupying the space in the battery, and causing the battery energy density to decrease.
  • the size of the tab connection part is larger than the size of the terminal connection part along the second direction, and the second direction is perpendicular to the first direction and the thickness direction.
  • the size of the terminal connection part is D4, and the size of the tab connection part is D5, satisfying 0 ⁇ D5-D4 ⁇ 0.5mm.
  • the terminal connection portion can be redundant in the second direction; on the other hand, it can prevent the terminal connection portion from being blocked in the second direction.
  • the width in the two directions is too small, which affects the connection between the terminal connection part and the electrode terminal.
  • the terminal connection portion includes a first surface close to the side of the tab and a second surface away from the side of the tab, and the terminal connection portion includes a first surface close to the side of the tab.
  • the third surface on the side of the electrode terminal and the fourth surface on the side away from the electrode terminal, along the thickness direction, the size from the first surface to the fourth surface is H1, satisfying, H1 ⁇ D2, and /Or, along the thickness direction, the size from the second surface to the third surface is H2, satisfying H2 ⁇ D1.
  • the tab connection portion of the previous adapter component in the thickness direction is higher.
  • a stacking space is formed at the terminal connection part of the latter transfer part, which is convenient for the placement of the latter transfer part, or when the transfer parts are stacked, the terminal connection part of the previous transfer part in the thickness direction is higher than that of the latter transfer part.
  • the tab connection part of one adapter component forms a stacking space to facilitate the placement of the next adapter component.
  • a second aspect of the embodiment of the present application provides a battery cell, including a casing, an electrode terminal, an electrode assembly and the above-mentioned adapter component.
  • the housing is provided with a receiving cavity, the electrode terminal is provided in the housing, the electrode assembly is received in the receiving cavity, and the adapter component is used to connect the electrode terminal and the electrode assembly.
  • a third aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell.
  • a fourth aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, where the battery cell is used to provide electric energy.
  • the adapter component, battery cell, battery and electrical device of the embodiments of the present application by bringing the terminal connecting part close to the electrode terminal, it is convenient to connect the terminal connecting part with the electrode terminal, thereby improving the docking accuracy between the terminal connecting part and the electrode terminal, and thus improving the battery quality.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
  • Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of an adapter component and an end cover provided by some embodiments of the present application.
  • Figure 5 is a schematic structural diagram of an adapter component provided by some embodiments of the present application.
  • Figure 6 is a stacking diagram of adapter components provided by some embodiments of the present application.
  • Figure 7 is a schematic structural diagram of an adapter component provided by some embodiments of the present application from another perspective.
  • Figure 8 is a stacking diagram of adapter components provided by other embodiments of the present application.
  • Figure 9 is a schematic diagram of the stacking of adapter components provided by some embodiments of the present application.
  • Figure 10 is a partial enlarged schematic diagram of position A in Figure 7.
  • Figure 11 is a schematic structural diagram of an adapter component provided by some embodiments of the present application from another perspective.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.
  • the embodiments of the present application are not limited to this.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery may also generally include a case for enclosing one or more battery cells.
  • the box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the positive electrode current collector includes a positive electrode current collector and a positive electrode tab connected to the positive electrode current collector.
  • the positive electrode current collector is coated on the surface of the positive electrode current collector. It is covered with a positive active material layer, and the positive tab is not coated with a positive active material layer.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material layer includes positive electrode active materials.
  • the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the negative electrode current collector includes a negative electrode current collector and a negative electrode tab connected to the negative electrode current collector.
  • the negative electrode current collector is coated on the surface of the negative electrode current collector. It is covered with a layer of negative active material, and the negative tab is not coated with a layer of negative active material.
  • the negative electrode current collector may be made of copper, and the negative electrode active material layer may include a negative electrode active material.
  • the negative electrode active material may be carbon or silicon.
  • the material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • Battery cells are usually provided with electrode terminals and adapter components for connecting the electrode terminals and tabs.
  • the electrode assembly can be electrically connected to the electrode terminal and the external circuit through the adapter component to realize charging and discharging.
  • the design of the adapter component only takes into account the connection requirements of the adapter component, and does not affect the adapter. Less consideration is given to the installation of components, which can easily lead to misalignment between the electrode terminals and the adapter components during installation, resulting in misalignment between the adapter components and the electrode terminals, which directly affects the amount of current passing through and reduces the quality of the battery.
  • embodiments of the present application provide a technical solution, which provides a terminal connection part and a tab connection part with different heights along the thickness direction, so that the terminal connection part can fit the electrode terminal and improve the connection between the terminal connection part and the electrode.
  • the docking accuracy between terminals ensures battery quality.
  • the inventor of the present application has designed an adapter component, a battery cell, a battery and an electrical device after in-depth research.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electric device 1000 according to an embodiment of the present application is used as an example.
  • FIG 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle.
  • the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery mentioned refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • FIG 2 is a schematic structural diagram of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a box 110.
  • the box 110 may include a first box part 111 and a second box part 112 that are connected. Multiple battery cells 10 are connected to each other. The parallel or series or mixed combination is placed in the space formed by connecting the first box part 111 and the second box part 112.
  • the shapes of the first box part 111 and the second box part 112 can be based on the shape of multiple batteries. The shape formed by combining the monomers 10 is determined.
  • the battery cell 10 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application.
  • the packaging methods of the battery cells 10 include but are not limited to cylindrical battery cells, rectangular battery cells, soft-pack battery cells, etc., which are not specifically limited in the embodiments of the present application.
  • the battery 100 may also include other structures, such as bus components, for realizing electrical connections between multiple battery cells 10 , which will not be described in detail here.
  • FIG. 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • a battery cell including a casing 120 , an electrode terminal 140 , an electrode assembly 130 and an adapter component 150 .
  • the electrode terminal 140 is provided in the housing 120
  • the electrode assembly 130 is accommodated in the housing 120 .
  • the adapter component 150 is used to connect the electrode terminal 140 and the electrode assembly 130 .
  • the casing 120 is a component used to form an internal environment of the battery cell, and the formed internal environment can be used to accommodate the electrode assembly 130, the electrolyte (not shown in the figure), and other components.
  • the housing 120 can be in various structural forms, such as a cuboid, a cylinder, etc.
  • the shape of the housing 120 may be determined according to the specific shape of the electrode assembly 130 .
  • the housing 120 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • FIGS. 3 to 5 a battery cell adapter component 150 is provided, including a tab connection part 151 , a terminal connection part 152 and a bending part 153 .
  • the tab connecting portion 151 is used to connect the tab 131 of the battery cell
  • the terminal connecting portion 152 is used to connect the electrode terminal 140 of the battery cell.
  • the terminal The lug connection part 151 is offset from the terminal connection part 152 , and the bending part 153 connects the lug connection part 151 and the terminal connection part 152 .
  • the electrode terminal 140 is used to connect the electrode assembly 130 in the battery cell and an external power device to form a complete circuit to realize the charging and discharging process of the battery cell.
  • the adapter component 150 is used to electrically connect the tab 131 and the electrode terminal 140 .
  • the adapter component 150 may have a two-layer ladder structure.
  • the layer near the electrode terminal 140 is the terminal connection part 152
  • the layer near the tab 131 is the tab connection part 151
  • the bending part 153 is the part connecting the two layers.
  • the angle between the bending part 153 and the terminal connection part 152 can be a right angle, an obtuse angle or an acute angle
  • the angle between the bending part 153 and the tab connection part 151 can be Right angle, obtuse angle or acute angle.
  • the connection between the terminal connection portion 152 and the electrode terminal 140 is facilitated, and the docking accuracy between the terminal connection portion 152 and the electrode terminal 140 is improved, thereby improving the quality of the battery.
  • the side of the terminal connection portion 152 away from the electrode terminal 140 is provided with a plurality of recessed portions 154 that are recessed along the thickness direction.
  • the recessed portions 154 are used to absorb laser light during laser welding, reduce laser reflection, and reduce the occurrence of false welding. , thereby increasing the connection strength between the terminal connection section and the electrode terminal 140 .
  • the electrode assembly 130 further includes a main body portion located on a side of the adapter component 150 away from the electrode terminal 140 , and the tabs 131 are led out from the end surface of the main body portion facing the adapter component 150 .
  • the housing may include a housing and an end cover.
  • the housing is a hollow structure with an opening on one side.
  • the end cover covers the opening of the housing and forms a sealed connection to form a structure for accommodating the electrode assembly 130 and the internal environment of the electrolyte.
  • the end cap is provided with electrode terminals 140 for extracting electric energy, and the adapter component 150 is provided between the end cap and the electrode assembly 130 .
  • FIG. 6 is a stacking diagram of the adapter component 150 provided by some embodiments of the present application.
  • the angle between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 is a right angle, and in the thickness direction, the size of the bent portion 153 is consistent with the size of the tab connecting portion 151 and the terminal connecting portion 152 .
  • the terminal connection portions 152 have the same thickness.
  • FIG. 7 is a schematic structural diagram of the adapter component 150 provided by some embodiments of the present application from another perspective. As shown in FIGS. 5 and 7 , in some optional embodiments of the present application, the bent portion 153 is inclined from the tab connecting portion 151 toward the terminal connecting portion 152 .
  • the tab connecting portion 151 and the terminal connecting portion 152 can be relatively far apart, so that when multiple adapter components 150 are stacked, they have a larger
  • the avoidance space can accommodate the terminal connecting portion 152 and the tab connecting portion 151 with different heights in the thickness direction, reducing the position difference between the upper and lower adapter components 150 in the stacking direction, and reducing the stacking position difference of the adapter component 150 , resulting in a decrease in the connection accuracy between the adapter component 150 and the electrode terminal 140 and/or the tab 131 .
  • FIG. 8 is a stacking diagram of the adapter component 150 provided by other embodiments of the present application.
  • the angles between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 are right angles, and in the thickness direction, the bent portion If the size of 153 is larger than the thickness of the tab connection part 151 and the terminal connection part 152, the upper adapter part 150 will be offset in the W direction in the figure relative to the lower adapter part 150, resulting in the failure of the adapter part 150 during installation. There is a deviation in the initial position, which in turn leads to a decrease in the docking accuracy between the adapter component 150 and the electrode terminal 140, resulting in a decrease in battery quality.
  • FIG. 9 is a stacking diagram of the adapter component 150 provided by some embodiments of the present application.
  • the angle between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 is an obtuse angle, and in the thickness direction, the terminal connecting portion There is enough avoidance space below 152 to accommodate the previous adapter component 150, so that the initial position of the adapter component 150 is fixed during installation, reducing the docking error between the adapter component 150 and the electrode terminal 140, and improving battery quality.
  • Figure 10 is a partial enlarged schematic diagram of position A in Figure 6.
  • the angle between the bent portion 153 and the thickness direction is ⁇ , which satisfies 30° ⁇ 60°.
  • 35° ⁇ 55°, 45° ⁇ 50°, 48° ⁇ 50°, and 50° ⁇ 53° are satisfied.
  • FIG. 11 is a structural schematic diagram of the adapter component 150 provided by some embodiments of the present application from another perspective. As shown in Figure 5, Figure 7 and Figure 11, in some optional embodiments of the present application, the terminal connection part 152, the bending part 153, and the tab connection part 151 are arranged in sequence along the first direction (the y-axis direction in the figure). cloth, the first direction is perpendicular to the thickness direction.
  • the terminal connection portion 152 By arranging the terminal connection portion 152 , the bending portion 153 , and the tab connection portion 151 in sequence along the first direction, the terminal connection portion 152 can be relatively far away from the tab connection portion 151 , and the number of terminal connection portions 152 and tab connection portions 151 can be reduced. interfere with each other.
  • the thickness of the terminal connection part 152 is D1
  • the thickness of the tab connection part 151 is D2
  • the thickness of the bending part 153 is D3. Satisfy, D1 ⁇ D3 ⁇ D2.
  • the tab connecting portion 151 can be made thicker, which facilitates the connection between the tab connecting portion 151 and the tab 131 .
  • the thickness of the terminal connection part 152 is also made thin, which facilitates the connection between the terminal connection part 152 and the electrode terminal 140.
  • the bending part 153 can have the thickest thickness, which improves the connection between the tab connection part 151 and the terminal. The connection strength between the connection parts 152.
  • the thickness of the terminal connection part 152 is D1
  • the thickness of the tab connection part 151 is D2
  • the thickness of the bending part 153 is D3. Satisfied, 0.3mm ⁇ D1 ⁇ D3 ⁇ D2 ⁇ 3mm.
  • the tab connecting portion 151 and the terminal connecting portion 152 can have a certain thickness that satisfies the requirements between the tab connecting portion 151 and the pole.
  • the connection between the lug 131 and the terminal connecting part 152 and the electrode terminal 140 is required.
  • it can prevent the lug connecting part 151, the terminal connecting part 152 and the bending part 153 from being too thick and occupying the space in the battery, causing Battery energy density decreases.
  • the size of the tab connection part 151 is larger than the size of the terminal connection part 152,
  • the second direction is perpendicular to the first direction and the thickness direction.
  • the size of the terminal connection part 152 is D4, and the size of the tab connection part 151 is D5, satisfying, 0 ⁇ D5-D4 ⁇ 0.5mm.
  • the terminal connection portion 152 can be made redundant in the second direction; on the other hand, it can prevent the terminal connection portion 152 from being in the second direction.
  • the width in the two directions is too small, which affects the connection between the terminal connecting portion 152 and the electrode terminal 140 .
  • the tab connection part 151 includes a first surface 155 on the side close to the tab 131 and a first surface 155 on the side away from the tab 131.
  • the second surface 156 and the terminal connection part 152 include a third surface 157 on a side close to the electrode terminal 140 and a fourth surface 158 on a side away from the electrode terminal 140.
  • the dimensions of the first surface 155 to the fourth surface 158 are H1 satisfies H1 ⁇ D2
  • the dimensions of the second surface 156 to the third surface 157 along the thickness direction are H2 and satisfies H2 ⁇ D1.
  • the tabs of the previous adapter component 150 in the thickness direction can be connected.
  • the portion 151 is higher than the terminal connecting portion 152 of the subsequent adapter component 150, thereby forming a stacking space to facilitate the placement of the subsequent adapter component 150, or to enable the adapter component 150 to overlap the previous adapter component in the thickness direction when stacked.
  • the terminal connecting portion 152 of 150 is higher than the tab connecting portion 151 of the subsequent adapter component 150, which forms a stacking space to facilitate the placement of the subsequent adapter component 150.
  • a battery cell including a casing, an electrode terminal 140, an electrode assembly 130, and the above-mentioned adapter component 150.
  • the housing is provided with a receiving cavity, the electrode terminal 140 is provided in the housing, the electrode assembly 130 is received in the receiving cavity, and the adapter component 150 is used to connect the electrode terminal 140 and the electrode assembly 130 .
  • a battery including the above-mentioned battery cell.
  • an electrical device including the above-mentioned battery cell, and the battery cell is used to provide electric energy.
  • a battery cell adapter component 150 including a tab connection part 151 , a terminal connection part 152 and a bending part 153 .
  • the tab connection part 151 is used to connect the tab 131 of the battery cell
  • the terminal connection part 152 is used to connect the electrode terminal 140 of the battery cell.
  • the terminal connection part 152 is connected to the tab.
  • the bending portion 151 is disposed in an offset position, and the bending portion 153 connects the tab connection portion 151 and the terminal connection portion 152.
  • the bending portion 153 is inclined from the tab connection portion 151 toward the terminal connection portion 152.
  • the bending portion 153 is sandwiched between the tab connection portion 151 and the terminal connection portion 152 in the thickness direction.
  • the angle is ⁇ , which satisfies 43° ⁇ 48°.
  • the terminal connection part 152, the bending part 153, and the tab connection part 151 are arranged in sequence along the first direction, which is perpendicular to the thickness direction.
  • the thickness of the terminal connection part 152 is D1
  • the thickness of the tab connection part 151 is D2.
  • the thickness of the bent portion 153 is D3, which satisfies D1 ⁇ D3 ⁇ D2.
  • the thickness of the terminal connection part 152 is D1, the thickness of the tab connection part 151 is D2, and the thickness of the bending part 153 is D3, which satisfies 1 mm ⁇ D1 ⁇ D3 ⁇ D2 ⁇ 3 mm.
  • the size of the tab connecting portion 151 is larger than the size of the terminal connecting portion 152.
  • the second direction is perpendicular to the first direction and the thickness direction.
  • the size of the terminal connecting portion 152 is D4, and the tab connecting portion 151 has a size of D4.
  • the size of the part 151 is D5, which satisfies 0.3mm ⁇ D5-D4 ⁇ 0.5mm.
  • the tab connection portion 151 includes a first surface 155 on a side close to the tab 131 and a second surface 156 on a side away from the tab 131 .
  • the terminal connection portion 152 includes a third surface 157 on a side close to the electrode terminal 140 and a third surface 157 on a side away from the electrode terminal.
  • the fourth surface 158 on the 140 side, along the thickness direction, the size of the first surface 155 to the fourth surface 158 is H1, satisfying, H1 ⁇ D2, and/or, along the thickness direction, the second surface 156 to the third surface 157
  • the size of is H2, satisfying, H2 ⁇ D1.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Provided in the embodiments of the present application are an adapter component, a battery cell, a battery and an electric device. The adapter component comprises a tab connection portion, a terminal connection portion and a bent portion, wherein the tab connection portion is configured for connection to a tab of the battery cell; the terminal connection portion is configured for connection to an electrode terminal of the battery cell; the tab connection portion is offset from the terminal connection portion in the thickness direction of the tab connection portion; and the bent portion is connected to the tab connection portion and the terminal connection portion. The terminal connection portion being close to the electrode terminal facilitates connection between the terminal connection portion and the electrode terminal, so that the alignment precision of the terminal connection portion and the electrode terminal is improved, thereby further improving the quality of the battery.

Description

转接部件、电池单体、电池及用电装置Adapter components, battery cells, batteries and electrical devices 技术领域Technical field
本申请属于电池技术领域，尤其涉及一种转接部件、电池单体、电池及用电装置。The present application belongs to the field of battery technology, and in particular relates to an adapter component, a battery cell, a battery and an electrical device.
背景技术Background technique
随着自然资源的消耗及环境的破坏日益加重，各领域中对可以储存能量并有效地利用储存能量的装置兴趣日益增长。电池单体是可以彼此结合的利用新的可再生能量的***。As the consumption of natural resources and environmental damage become increasingly severe, interest in devices that can store energy and effectively utilize the stored energy is growing in various fields. Battery cells are systems that can be combined with each other to harness new renewable energy.
在电池设备技术领域中，提升电池的质量是亟待解决的问题。In the field of battery equipment technology, improving the quality of batteries is an urgent problem that needs to be solved.
申请内容Application content
本申请实施方式提供了一种转接部件、电池单体、电池及用电装置，能够提高转接部件与电极端子和/或极耳间的对接精度，进而提高电池质量。Embodiments of the present application provide an adapter component, a battery cell, a battery and a power device, which can improve the docking accuracy between the adapter component and electrode terminals and/or tabs, thereby improving battery quality.
本申请实施方式的第一方面，提供了一种电池单体的转接部件，包括极耳连接部、端子连接部和弯折部。所述极耳连接部用于连接电池单体的极耳，所述端子连接部用于连接电池单体的电极端子，在所述极耳连接部的厚度方向上，所述极耳连接部与所述端子连接部错位设置，所述弯折部连接所述极耳连接部和所述端子连接部。A first aspect of the embodiment of the present application provides an adapter component for a battery cell, which includes a tab connection part, a terminal connection part and a bending part. The tab connection portion is used to connect the tabs of the battery cells, and the terminal connection portion is used to connect the electrode terminals of the battery cells. In the thickness direction of the tab connection portion, the tab connection portion and The terminal connecting portion is disposed in an offset position, and the bending portion connects the tab connecting portion and the terminal connecting portion.
采用上述结构，通过将端子连接部与极耳连接部错位设置，便于端子连接部与电极端子相连接，提高端子连接部与电极端子间的对接精度，进而提高电池质量。Using the above structure, by disposing the terminal connection part and the tab connection part in a staggered manner, the connection between the terminal connection part and the electrode terminal is facilitated, the docking accuracy between the terminal connection part and the electrode terminal is improved, and the quality of the battery is improved.
在本申请一些可选实施方式中，所述弯折部从所述极耳连接部朝向所述端子连接部倾斜设置。In some optional embodiments of the present application, the bent portion is inclined from the tab connecting portion toward the terminal connecting portion.
采用上述结构，通过使弯折部从极耳连接部朝向端子连接部倾斜 设置，能够使极耳连接部与端子连接部间相对远离，使多个转接部件在堆叠时，具有更大的避让空间，能够容纳在厚度方向上高度不一的端子连接部及极耳连接部，降低堆叠方向上下方与上方转接部件间的位置差异，减少由于转接部件堆叠位置差异，导致转接部件与电极端子和/或极耳间连接精度的下降。With the above structure, by arranging the bent portion to be inclined from the tab connecting portion toward the terminal connecting portion, the tab connecting portion and the terminal connecting portion can be relatively far apart, so that the plurality of adapter components have greater clearance when stacked. The space can accommodate the terminal connection parts and tab connection parts with different heights in the thickness direction, reduce the position difference between the upper and lower transfer parts in the stacking direction, and reduce the difference in the stacking position of the transfer parts, resulting in the transfer parts and Reduction in accuracy of connection between electrode terminals and/or lugs.
在本申请一些可选实施方式中，所述弯折部与所述厚度方向的夹角为α，满足，30°≤α≤60°。In some optional embodiments of the present application, the angle between the bending portion and the thickness direction is α, which satisfies 30°≤α≤60°.
采用上述结构，通过对弯折部倾斜角度的限定，一方面，能够防止倾斜角度过小，导致弯折部需要较长尺寸，才能获得足够的避让空间，另一方面，也能够防止倾斜角度过大，导致弯折部的尺寸较小，不满足避让空间的需要。Using the above structure, by limiting the inclination angle of the bending part, on the one hand, it is possible to prevent the inclination angle from being too small, causing the bending part to need a longer length to obtain sufficient avoidance space; on the other hand, it is also possible to prevent the inclination angle from being too small. Large, resulting in a smaller size of the bending part, which does not meet the need for avoidance space.
在本申请一些可选实施方式中，所述端子连接部、所述弯折部、所述极耳连接部沿第一方向依次排布，所述第一方向与所述厚度方向垂直。In some optional embodiments of the present application, the terminal connecting portion, the bending portion, and the tab connecting portion are arranged in sequence along a first direction, and the first direction is perpendicular to the thickness direction.
采用上述结构，通过将端子连接部、弯折部、极耳连接部沿第一方向依次排布，能够使端子连接部相对远离极耳连接部，减少端子连接部与极耳连接部间相互干扰。Using the above structure, by arranging the terminal connection part, the bending part, and the tab connection part in sequence along the first direction, the terminal connection part can be relatively far away from the tab connection part, thereby reducing mutual interference between the terminal connection part and the tab connection part. .
在本申请一些可选实施方式中，所述端子连接部的厚度为D1，所述极耳连接部的厚度为D2，所述弯折部的厚度为D3，满足，D1≤D3≤D2。In some optional embodiments of this application, the thickness of the terminal connection part is D1, the thickness of the tab connection part is D2, and the thickness of the bending part is D3, satisfying D1 ≤ D3 ≤ D2.
采用上述结构，通过对端子连接部、弯折部、极耳连接部的厚度关系进行限定，一方面，能够使极耳连接部具有较厚的厚度，便于极耳连接部与极耳相连接，也使端子连接部的厚度较薄，便于端子连接部与电极端子相连接，另一方面，能够使弯折部处具有最厚的厚度，提高极耳连接部与端子连接部间的连接强度。Using the above structure, by limiting the thickness relationship between the terminal connection part, the bending part, and the tab connection part, on the one hand, the tab connection part can be made thicker, which facilitates the connection between the tab connection part and the tab. The thickness of the terminal connection part is also made thin, which facilitates the connection between the terminal connection part and the electrode terminal. On the other hand, the thickness can be made thickest at the bending part, thereby improving the connection strength between the tab connection part and the terminal connection part.
在本申请一些可选实施方式中，所述端子连接部的厚度为D1，所述极耳连接部的厚度为D2，所述弯折部的厚度为D3，满足，0.3mm≤D1≤D3≤D2≤3mm。In some optional embodiments of this application, the thickness of the terminal connection part is D1, the thickness of the tab connection part is D2, and the thickness of the bending part is D3, satisfying 0.3mm≤D1≤D3≤ D2≤3mm.
采用上述结构，通过对端子连接部、弯折部、极耳连接部的厚度进行限定，一方面，能够使极耳连接部、端子连接部具有一定的厚度，满足极耳连接部与极耳和端子连接部与电极端子间的连接需要，另一方面， 能够防止极耳连接部、端子连接部、弯折部处的厚度过大，占用电池内的空间，造成电池能量密度下降。Using the above structure, by limiting the thickness of the terminal connection part, the bending part, and the tab connection part, on the one hand, the tab connection part and the terminal connection part can have a certain thickness to satisfy the requirements between the tab connection part and the tab. The connection between the terminal connection part and the electrode terminal is required. On the other hand, it can prevent the thickness of the tab connection part, the terminal connection part and the bending part from being too large, occupying the space in the battery, and causing the battery energy density to decrease.
在本申请一些可选实施方式中，沿第二方向上，所述极耳连接部的尺寸大于所述端子连接部的尺寸，所述第二方向垂直于所述第一方向及所述厚度方向。In some optional embodiments of the present application, the size of the tab connection part is larger than the size of the terminal connection part along the second direction, and the second direction is perpendicular to the first direction and the thickness direction. .
采用上述结构，通过使端子连接部在第二方向上的尺寸减小，能够在转接部件安装时，第二方向上具有较大的冗余空间，便于调整端子连接部与电极端子间的相对位置，提高安装精度。Using the above structure, by reducing the size of the terminal connection part in the second direction, when the adapter component is installed, a larger redundant space can be provided in the second direction, which facilitates adjustment of the relative position between the terminal connection part and the electrode terminal. position to improve installation accuracy.
在本申请一些可选实施方式中，沿所述第二方向，所述端子连接部的尺寸为D4，所述极耳连接部的尺寸为D5，满足，0＜D5-D4≤0.5mm。In some optional embodiments of the present application, along the second direction, the size of the terminal connection part is D4, and the size of the tab connection part is D5, satisfying 0<D5-D4≤0.5mm.
采用上述结构，通过对第二方向上端子连接部和极耳连接部宽度的限定，一方面，能够实现端子连接部在第二方向上冗余；另一方面，能够能够防止端子连接部在第二方向上的宽度过小，影响端子连接部与电极端子相连接。Using the above structure, by limiting the width of the terminal connection portion and the tab connection portion in the second direction, on the one hand, the terminal connection portion can be redundant in the second direction; on the other hand, it can prevent the terminal connection portion from being blocked in the second direction. The width in the two directions is too small, which affects the connection between the terminal connection part and the electrode terminal.
在本申请一些可选实施方式中，所述极耳连接部包括靠近所述极耳一侧的第一表面和远离所述极耳一侧的第二表面，所述端子连接部包括靠近所述电极端子一侧的第三表面和远离所述电极端子一侧的第四表面，沿所述厚度方向，所述第一表面到所述第四表面的尺寸为H1，满足，H1≥D2，和/或，沿所述厚度方向，所述第二表面到所述第三表面的尺寸为H2，满足，H2≥D1。In some optional embodiments of the present application, the terminal connection portion includes a first surface close to the side of the tab and a second surface away from the side of the tab, and the terminal connection portion includes a first surface close to the side of the tab. The third surface on the side of the electrode terminal and the fourth surface on the side away from the electrode terminal, along the thickness direction, the size from the first surface to the fourth surface is H1, satisfying, H1≥D2, and /Or, along the thickness direction, the size from the second surface to the third surface is H2, satisfying H2≥D1.
采用上述结构，通过对第一表面、第二表面、第三表面和第四表面间距离的限定，能够使转接部件在叠放时，厚度方向上前一个转接部件的极耳连接部高于后一个转接部件的端子连接部，即形成叠放空间，便于后一个转接部件放置，或使转接部件在叠放时，厚度方向上前一个转接部件的端子连接部高于后一个转接部件的极耳连接部，即形成叠放空间，便于后一个转接部件放置。Using the above structure, by limiting the distance between the first surface, the second surface, the third surface and the fourth surface, when the adapter components are stacked, the tab connection portion of the previous adapter component in the thickness direction is higher. A stacking space is formed at the terminal connection part of the latter transfer part, which is convenient for the placement of the latter transfer part, or when the transfer parts are stacked, the terminal connection part of the previous transfer part in the thickness direction is higher than that of the latter transfer part. The tab connection part of one adapter component forms a stacking space to facilitate the placement of the next adapter component.
本申请实施方式的第二方面，提供了一种电池单体，包括外壳、电极端子、电极组件和上述转接部件。所述外壳设置有容纳腔，所述电极端子设于所述外壳，所述电极组件容纳于所述容纳腔，所述转接部件，用 于连接所述电极端子及所述电极组件。A second aspect of the embodiment of the present application provides a battery cell, including a casing, an electrode terminal, an electrode assembly and the above-mentioned adapter component. The housing is provided with a receiving cavity, the electrode terminal is provided in the housing, the electrode assembly is received in the receiving cavity, and the adapter component is used to connect the electrode terminal and the electrode assembly.
本申请实施方式的第三方面，提供了一种电池，包括上述电池单体。A third aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell.
本申请实施方式的第四方面，提供了一种用电设备，包括上述电池单体，所述电池单体用于提供电能。A fourth aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, where the battery cell is used to provide electric energy.
与相关技术相比，本申请实施方式的转接部件、电池单体、电池及用电装置中，通过将端子连接部贴近电极端子，便于端子连接部与电极端子相连接，提高端子连接部与电极端子间的对接精度，进而提高电池质量。Compared with the related art, in the adapter component, battery cell, battery and electrical device of the embodiments of the present application, by bringing the terminal connecting part close to the electrode terminal, it is convenient to connect the terminal connecting part with the electrode terminal, thereby improving the docking accuracy between the terminal connecting part and the electrode terminal, and thus improving the battery quality.
附图说明Description of drawings
为了更清楚地说明本申请实施方式的技术方案，下面将对本申请实施方式中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.
图1为本申请一些实施例提供的车辆的结构示意图。Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
图2为本申请一些实施例提供的电池的结构示意图。Figure 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
图3为本申请一些实施例提供的电池单体的结构示意图。Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
图4为本申请一些实施例提供的转接部件和端盖的结构示意图。Figure 4 is a schematic structural diagram of an adapter component and an end cover provided by some embodiments of the present application.
图5为本申请一些实施例提供的转接部件的结构示意图。Figure 5 is a schematic structural diagram of an adapter component provided by some embodiments of the present application.
图6为本申请一些实施例提供的转接部件的堆叠示意图。Figure 6 is a stacking diagram of adapter components provided by some embodiments of the present application.
图7为本申请一些实施例提供的转接部件的另一视角结构示意图。Figure 7 is a schematic structural diagram of an adapter component provided by some embodiments of the present application from another perspective.
图8为本申请另一些实施例提供的转接部件的堆叠示意图。Figure 8 is a stacking diagram of adapter components provided by other embodiments of the present application.
图9为本申请又一些实施例提供的转接部件的堆叠示意图。Figure 9 is a schematic diagram of the stacking of adapter components provided by some embodiments of the present application.
图10为图7中A处的局部放大示意图。Figure 10 is a partial enlarged schematic diagram of position A in Figure 7.
图11为本申请一些实施例提供的转接部件的又一视角结构示意图。Figure 11 is a schematic structural diagram of an adapter component provided by some embodiments of the present application from another perspective.
附图中：In the attached picture:
1000、车辆；100、电池；200、控制器；300、马达；110、箱体； 111、第一箱体部；112、第二箱体部；10、电池单体；120、外壳；121、端盖；122、壳体；130、电极组件；131、极耳；140、电极端子；150、转接部件；1000. Vehicle; 100. Battery; 200. Controller; 300. Motor; 110. Box; 111. First box part; 112. Second box part; 10. Battery cell; 120. Shell; 121. End cap; 122. Shell; 130. Electrode assembly; 131. Poles; 140. Electrode terminal; 150. Adapter parts;
151、极耳连接部；152、端子连接部；153、弯折部；154、凹部；155、第一表面；156、第二表面；157、第三表面；158、第四表面。151. Tab connection part; 152. Terminal connection part; 153. Bending part; 154. Recessed part; 155. First surface; 156. Second surface; 157. Third surface; 158. Fourth surface.
具体实施方式Detailed ways
下面将结合附图对本申请技术方案的实施方式进行详细的描述。以下实施方式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。The implementation of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and are therefore only used as examples and cannot be used to limit the protection scope of the present application.
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方式的目的，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。Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field belonging to this application; the terms used herein are for the purpose of describing specific embodiments only and are not intended to be used in Limitation of this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.
在本申请实施方式的描述中，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。In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity or specificity of the indicated technical features. Sequence or priority relationship.
在本文中提及“实施方式”意味着，结合实施方式描述的特定特征、结构或特性可以包含在本申请的至少一个实施方式中。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方式，也不是与其它实施方式互斥的独立的或备选的实施方式。本领域技术人员显式地和隐式地理解的是，本文所描述的实施方式可以与其它实施方式相结合。Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
在本申请实施方式的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。In the description of the embodiments of this application, the term "and/or" is only an association relationship describing associated objects, indicating that there can be three relationships, such as A and/or B, which can mean: A exists alone, and A exists simultaneously and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.
在本申请实施方式的描述中，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)。In the description of the embodiments of this application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to It is more than two pieces (including two pieces).
在本申请实施方式的描述中，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方式和简化描述，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方式的限制。In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right" and "vertical" The orientation or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only to facilitate the description of the embodiments of the present application and to simplify the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the implementation of the present application. method restrictions.
在本申请实施方式的描述中，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方式中的具体含义。In the description of the embodiments of the present application, unless otherwise explicitly stipulated and limited, technical terms such as "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. It can be disassembled and connected, or integrated; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。In this application, battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc., The embodiments of the present application are not limited to this. The battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。电池一般还可包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。The battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery may also generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
电池单体包括电极组件和电解液，电极组件包括正极片、负极片和隔膜。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和连接于正极集流部的正极极耳，正极集流部涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质层包括正极 活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和连接于负极集流部的负极极耳，负极集流部涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector includes a positive electrode current collector and a positive electrode tab connected to the positive electrode current collector. The positive electrode current collector is coated on the surface of the positive electrode current collector. It is covered with a positive active material layer, and the positive tab is not coated with a positive active material layer. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material layer includes positive electrode active materials. The positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode current collector and a negative electrode tab connected to the negative electrode current collector. The negative electrode current collector is coated on the surface of the negative electrode current collector. It is covered with a layer of negative active material, and the negative tab is not coated with a layer of negative active material. The negative electrode current collector may be made of copper, and the negative electrode active material layer may include a negative electrode active material. The negative electrode active material may be carbon or silicon. In order to ensure that large currents can pass through without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc. In addition, the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
电池单体上通常设置有电极端子以及用于连接电极端子与极耳的转接部件。电极组件可通过转接部件与电极端子和外电路电连接，以实现充放电。发明人注意到，转接部件与电极端子和电极组件间的连接精度，对电池质量的影响较大，而相关技术中，转接部件的设计仅考虑到转接部件的连接需求，对转接部件安装工作的考虑较少，易造成安装时，电极端子与转接部件间无法对齐，导致转接部件与电极端子间错位，直接影响通过的电流量，造成电池质量下降。Battery cells are usually provided with electrode terminals and adapter components for connecting the electrode terminals and tabs. The electrode assembly can be electrically connected to the electrode terminal and the external circuit through the adapter component to realize charging and discharging. The inventor noticed that the connection accuracy between the adapter component, the electrode terminal and the electrode assembly has a greater impact on the quality of the battery. In the related art, the design of the adapter component only takes into account the connection requirements of the adapter component, and does not affect the adapter. Less consideration is given to the installation of components, which can easily lead to misalignment between the electrode terminals and the adapter components during installation, resulting in misalignment between the adapter components and the electrode terminals, which directly affects the amount of current passing through and reduces the quality of the battery.
鉴于此，本申请实施例提供了一种技术方案，其通过设置沿厚度方向高度不一的端子连接部和极耳连接部，便于端子连接部能够贴合于电极端子，提高端子连接部与电极端子间的对接精度，保证电池质量。In view of this, embodiments of the present application provide a technical solution, which provides a terminal connection part and a tab connection part with different heights along the thickness direction, so that the terminal connection part can fit the electrode terminal and improve the connection between the terminal connection part and the electrode. The docking accuracy between terminals ensures battery quality.
基于以上考虑，本申请发明人经过深入研究，设计了一种转接部件、电池单体、电池及用电装置。Based on the above considerations, the inventor of the present application has designed an adapter component, a battery cell, a battery and an electrical device after in-depth research.
本申请实施例提供一种使用电池作为电源的用电装置，用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。Embodiments of the present application provide an electrical device that uses a battery as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆1000为例进行说明。For the convenience of explanation in the following embodiments, an electric device 1000 according to an embodiment of the present application is used as an example.
图1为本申请一些实施例提供的车辆1000的结构示意图。如图1所示，车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。Figure 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. As shown in Figure 1, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 . The battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 . The vehicle 1000 may also include a controller 200 and a motor 300 . The controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。In some embodiments of the present application, the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
本申请的实施例中，所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。In the embodiments of this application, the battery mentioned refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack.
图2为本申请一些实施例提供的电池100的结构示意图。如图2所示，在本申请一些实施方式中，电池100包括箱体110，箱体110可以包括相连接的第一箱体部111和第二箱体部112，多个电池单体10相互并联或串联或混联组合后置于第一箱体部111和第二箱体部112连接后形成的空间内，第一箱体部111和第二箱体部112的形状可以根据多个电池单体10组合而成的形状确定。电池单体10可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此不作限定。电池单体10的封装方式包括但不限于柱形电池单体、方体方形电池单体和软包电池单体等，本申请实施例对此也不作具体限定。此外，电池100还可以包括其他结构，例如，汇流部件，用于实现多个电池单体10之间的电连接，在此不再一一赘述。Figure 2 is a schematic structural diagram of a battery 100 provided by some embodiments of the present application. As shown in Figure 2, in some embodiments of the present application, the battery 100 includes a box 110. The box 110 may include a first box part 111 and a second box part 112 that are connected. Multiple battery cells 10 are connected to each other. The parallel or series or mixed combination is placed in the space formed by connecting the first box part 111 and the second box part 112. The shapes of the first box part 111 and the second box part 112 can be based on the shape of multiple batteries. The shape formed by combining the monomers 10 is determined. The battery cell 10 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application. The packaging methods of the battery cells 10 include but are not limited to cylindrical battery cells, rectangular battery cells, soft-pack battery cells, etc., which are not specifically limited in the embodiments of the present application. In addition, the battery 100 may also include other structures, such as bus components, for realizing electrical connections between multiple battery cells 10 , which will not be described in detail here.
图3为本申请一些实施例提供的电池单体的结构示意图。如图3所示，本申请一些实施方式中，提供了一种电池单体，包括外壳120、电极端子140、电极组件130及转接部件150。电极端子140设置于外壳120，电极组件130容纳于外壳120内。转接部件150用于连接电极端子140和电极组件130。Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application. As shown in FIG. 3 , in some embodiments of the present application, a battery cell is provided, including a casing 120 , an electrode terminal 140 , an electrode assembly 130 and an adapter component 150 . The electrode terminal 140 is provided in the housing 120 , and the electrode assembly 130 is accommodated in the housing 120 . The adapter component 150 is used to connect the electrode terminal 140 and the electrode assembly 130 .
外壳120是用于形成电池单体的内部环境的组件，所形成的内部环境可以用于容纳电极组件130、电解液(在图中未示出)以及其他部件。外壳120可以是多种结构形式，如长方体、圆柱体等。示例性地，外壳120的形状可根据电极组件130的具体形状来确定。外壳120的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。The casing 120 is a component used to form an internal environment of the battery cell, and the formed internal environment can be used to accommodate the electrode assembly 130, the electrolyte (not shown in the figure), and other components. The housing 120 can be in various structural forms, such as a cuboid, a cylinder, etc. For example, the shape of the housing 120 may be determined according to the specific shape of the electrode assembly 130 . The housing 120 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
图4为本申请一些实施例提供的转接部件150和端盖的结构示意图，图5为本申请一些实施例提供的转接部件150的结构示意图。如图3至图5所示，提供了一种电池单体的转接部件150，包括极耳连接部151、端子连接部152和弯折部153。极耳连接部151用于连接电池单体的极耳131，端子连接部152用于连接电池单体的电极端子140，在极耳连接部151的厚度方向(图中x轴方向)上，极耳连接部151与端子连接部152错位设置，弯折部153连接极耳连接部151和端子连接部152。Figure 4 is a schematic structural diagram of the adapter component 150 and the end cover provided by some embodiments of the present application. Figure 5 is a schematic structural diagram of the adapter component 150 provided by some embodiments of the present application. As shown in FIGS. 3 to 5 , a battery cell adapter component 150 is provided, including a tab connection part 151 , a terminal connection part 152 and a bending part 153 . The tab connecting portion 151 is used to connect the tab 131 of the battery cell, and the terminal connecting portion 152 is used to connect the electrode terminal 140 of the battery cell. In the thickness direction of the tab connecting portion 151 (the x-axis direction in the figure), the terminal The lug connection part 151 is offset from the terminal connection part 152 , and the bending part 153 connects the lug connection part 151 and the terminal connection part 152 .
电极端子140用于连接电池单体内的电极组件130和外部用电装置，构成完整回路，实现电池单体的充放电过程。The electrode terminal 140 is used to connect the electrode assembly 130 in the battery cell and an external power device to form a complete circuit to realize the charging and discharging process of the battery cell.
转接部件150用于电连接极耳131和电极端子140。示例性地，转接部件150可为两层阶梯状结构，靠近电极端子140一侧的一层为端子连接部152，靠近极耳131一侧的一层为极耳连接部151，弯折部153为连接前述两层的部分，示例性地，弯折部153与端子连接部152间的夹角可为直角、钝角或锐角，弯折部153与极耳连接部151间的夹角可为直角、钝角或锐角。The adapter component 150 is used to electrically connect the tab 131 and the electrode terminal 140 . For example, the adapter component 150 may have a two-layer ladder structure. The layer near the electrode terminal 140 is the terminal connection part 152 , the layer near the tab 131 is the tab connection part 151 , and the bending part 153 is the part connecting the two layers. For example, the angle between the bending part 153 and the terminal connection part 152 can be a right angle, an obtuse angle or an acute angle, and the angle between the bending part 153 and the tab connection part 151 can be Right angle, obtuse angle or acute angle.
通过将端子连接部152与极耳连接部151错位设置，便于端子连接部152与电极端子140相连接，提高端子连接部152与电极端子140间的对接精度，进而提高电池质量。By staggering the terminal connection portion 152 and the tab connection portion 151 , the connection between the terminal connection portion 152 and the electrode terminal 140 is facilitated, and the docking accuracy between the terminal connection portion 152 and the electrode terminal 140 is improved, thereby improving the quality of the battery.
可选地，端子连接部152上远离电极端子140的一侧，设置有沿厚度方向凹陷设置的多个凹部154，凹部154用来在激光焊接时吸收激光，减少激光反射，减少虚焊的发生，从而增大端子连接段与电极端子140间的连接强度。Optionally, the side of the terminal connection portion 152 away from the electrode terminal 140 is provided with a plurality of recessed portions 154 that are recessed along the thickness direction. The recessed portions 154 are used to absorb laser light during laser welding, reduce laser reflection, and reduce the occurrence of false welding. , thereby increasing the connection strength between the terminal connection section and the electrode terminal 140 .
可选地，电极组件130还包括主体部，主体部位于转接部件150 远离电极端子140的一侧，极耳131从主体部面向转接部件150的端面引出。Optionally, the electrode assembly 130 further includes a main body portion located on a side of the adapter component 150 away from the electrode terminal 140 , and the tabs 131 are led out from the end surface of the main body portion facing the adapter component 150 .
参照图3，可选地，外壳可以包括壳体和端盖，壳体为一侧开口的空心结构，端盖盖合于壳体的开口处并形成密封连接，以形成用于容纳电极组件130和电解质的内部环境，端盖上设置有用于引出电能的电极端子140，转接部件150设置于端盖和电极组件130之间。Referring to FIG. 3 , optionally, the housing may include a housing and an end cover. The housing is a hollow structure with an opening on one side. The end cover covers the opening of the housing and forms a sealed connection to form a structure for accommodating the electrode assembly 130 and the internal environment of the electrolyte. The end cap is provided with electrode terminals 140 for extracting electric energy, and the adapter component 150 is provided between the end cap and the electrode assembly 130 .
图6为本申请一些实施例提供的转接部件150的堆叠示意图。参照图7，弯折部153与极耳连接部151和弯折部153与端子连接部152间的夹角为直角，且在厚度方向上，弯折部153的尺寸与极耳连接部151和端子连接部152的厚度相同。FIG. 6 is a stacking diagram of the adapter component 150 provided by some embodiments of the present application. Referring to FIG. 7 , the angle between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 is a right angle, and in the thickness direction, the size of the bent portion 153 is consistent with the size of the tab connecting portion 151 and the terminal connecting portion 152 . The terminal connection portions 152 have the same thickness.
图7为本申请一些实施例提供的转接部件150的另一视角结构示意图。如图5及图7所示，在本申请一些可选实施方式中，弯折部153从极耳连接部151朝向端子连接部152倾斜设置。FIG. 7 is a schematic structural diagram of the adapter component 150 provided by some embodiments of the present application from another perspective. As shown in FIGS. 5 and 7 , in some optional embodiments of the present application, the bent portion 153 is inclined from the tab connecting portion 151 toward the terminal connecting portion 152 .
通过使弯折部153从极耳连接部151朝向端子连接部152倾斜设置，能够使极耳连接部151与端子连接部152间相对远离，使多个转接部件150在堆叠时，具有更大的避让空间，能够容纳在厚度方向上高度不一的端子连接部152及极耳连接部151，降低堆叠方向上下方与上方转接部件150间的位置差异，减少由于转接部件150堆叠位置差异，导致转接部件150与电极端子140和/或极耳131间连接精度的下降。By arranging the bent portion 153 to be inclined from the tab connecting portion 151 toward the terminal connecting portion 152 , the tab connecting portion 151 and the terminal connecting portion 152 can be relatively far apart, so that when multiple adapter components 150 are stacked, they have a larger The avoidance space can accommodate the terminal connecting portion 152 and the tab connecting portion 151 with different heights in the thickness direction, reducing the position difference between the upper and lower adapter components 150 in the stacking direction, and reducing the stacking position difference of the adapter component 150 , resulting in a decrease in the connection accuracy between the adapter component 150 and the electrode terminal 140 and/or the tab 131 .
图8为本申请另一些实施例提供的转接部件150的堆叠示意图。参照图8，多个转接部件150堆叠时，若弯折部153与极耳连接部151和弯折部153与端子连接部152间的夹角为直角，且在厚度方向上，弯折部153的尺寸大于极耳连接部151和端子连接部152的厚度，则上方的转接部件150会相对于下方的转接部件150朝图中W方向偏移，导致安装时，获取转接部件150的初始位置存在偏移，进而导致转接部件150与电极端子140间的对接精度下降，造成电池质量降低。FIG. 8 is a stacking diagram of the adapter component 150 provided by other embodiments of the present application. Referring to FIG. 8 , when multiple adapter components 150 are stacked, if the angles between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 are right angles, and in the thickness direction, the bent portion If the size of 153 is larger than the thickness of the tab connection part 151 and the terminal connection part 152, the upper adapter part 150 will be offset in the W direction in the figure relative to the lower adapter part 150, resulting in the failure of the adapter part 150 during installation. There is a deviation in the initial position, which in turn leads to a decrease in the docking accuracy between the adapter component 150 and the electrode terminal 140, resulting in a decrease in battery quality.
图9为本申请又一些实施例提供的转接部件150的堆叠示意图。参照图9，多个转接部件150堆叠时，若弯折部153与极耳连接部151和弯折部153与端子连接部152间的夹角为钝角，且在厚度方向上，端子连 接部152下方存在足够的避让空间，用于容纳之前的转接部件150，使安装时，获取转接部件150的初始位置固定，降低转接部件150与电极端子140间的对接误差，提高电池质量。FIG. 9 is a stacking diagram of the adapter component 150 provided by some embodiments of the present application. Referring to FIG. 9 , when multiple adapter components 150 are stacked, if the angle between the bent portion 153 and the tab connecting portion 151 and the bent portion 153 and the terminal connecting portion 152 is an obtuse angle, and in the thickness direction, the terminal connecting portion There is enough avoidance space below 152 to accommodate the previous adapter component 150, so that the initial position of the adapter component 150 is fixed during installation, reducing the docking error between the adapter component 150 and the electrode terminal 140, and improving battery quality.
图10为图6中A处的局部放大示意图。如图5、图7及图10所示，在本申请一些可选实施方式中，弯折部153与厚度方向的夹角为α，满足，30°≤α≤60°。通过对弯折部153倾斜角度的限定，一方面，能够防止倾斜角度过小，导致弯折部153需要较长尺寸，才能获得足够的避让空间，另一方面，也能够防止倾斜角度过大，导致弯折部153的尺寸较小，不满足避让空间的需要。Figure 10 is a partial enlarged schematic diagram of position A in Figure 6. As shown in Figures 5, 7 and 10, in some optional embodiments of the present application, the angle between the bent portion 153 and the thickness direction is α, which satisfies 30°≤α≤60°. By limiting the inclination angle of the bending portion 153, on the one hand, it is possible to prevent the inclination angle from being too small, which would result in the bending portion 153 needing to be longer in order to obtain sufficient avoidance space; on the other hand, it is also possible to prevent the inclination angle from being too large. As a result, the size of the bent portion 153 is small and cannot meet the need for avoidance space.
可选地，满足，35°≤α≤55°、45°≤α≤50°、48°≤α≤50°、50°≤α≤53°。Optionally, 35°≤α≤55°, 45°≤α≤50°, 48°≤α≤50°, and 50°≤α≤53° are satisfied.
图11为本申请一些实施例提供的转接部件150的又一视角结构示意图。如图5、图7及图11所示，在本申请一些可选实施方式中，端子连接部152、弯折部153、极耳连接部151沿第一方向(图中y轴方向)依次排布，第一方向与厚度方向垂直。FIG. 11 is a structural schematic diagram of the adapter component 150 provided by some embodiments of the present application from another perspective. As shown in Figure 5, Figure 7 and Figure 11, in some optional embodiments of the present application, the terminal connection part 152, the bending part 153, and the tab connection part 151 are arranged in sequence along the first direction (the y-axis direction in the figure). cloth, the first direction is perpendicular to the thickness direction.
通过将端子连接部152、弯折部153、极耳连接部151沿第一方向依次排布，能够使端子连接部152相对远离极耳连接部151，减少端子连接部152与极耳连接部151间相互干扰。By arranging the terminal connection portion 152 , the bending portion 153 , and the tab connection portion 151 in sequence along the first direction, the terminal connection portion 152 can be relatively far away from the tab connection portion 151 , and the number of terminal connection portions 152 and tab connection portions 151 can be reduced. interfere with each other.
如图5、图7及图10所示，在本申请一些可选实施方式中，端子连接部152的厚度为D1，极耳连接部151的厚度为D2，弯折部153的厚度为D3，满足，D1≤D3≤D2。As shown in Figures 5, 7 and 10, in some optional embodiments of the present application, the thickness of the terminal connection part 152 is D1, the thickness of the tab connection part 151 is D2, and the thickness of the bending part 153 is D3. Satisfy, D1≤D3≤D2.
通过对端子连接部152、弯折部153、极耳连接部151的厚度关系进行限定，一方面，能够使极耳连接部151具有较厚的厚度，便于极耳连接部151与极耳131相连接，也使端子连接部152的厚度较薄，便于端子连接部152与电极端子140相连接，另一方面，能够使弯折部153处具有最厚的厚度，提高极耳连接部151与端子连接部152间的连接强度。By limiting the thickness relationship between the terminal connecting portion 152 , the bending portion 153 , and the tab connecting portion 151 , on the one hand, the tab connecting portion 151 can be made thicker, which facilitates the connection between the tab connecting portion 151 and the tab 131 . connection, the thickness of the terminal connection part 152 is also made thin, which facilitates the connection between the terminal connection part 152 and the electrode terminal 140. On the other hand, the bending part 153 can have the thickest thickness, which improves the connection between the tab connection part 151 and the terminal. The connection strength between the connection parts 152.
如图5、图7及图10所示，在本申请一些可选实施方式中，端子连接部152的厚度为D1，极耳连接部151的厚度为D2，弯折部153的厚度为D3，满足，0.3mm≤D1≤D3≤D2≤3mm。As shown in Figures 5, 7 and 10, in some optional embodiments of the present application, the thickness of the terminal connection part 152 is D1, the thickness of the tab connection part 151 is D2, and the thickness of the bending part 153 is D3. Satisfied, 0.3mm≤D1≤D3≤D2≤3mm.
通过对端子连接部152、弯折部153、极耳连接部151的厚度进行限定，一方面，能够使极耳连接部151、端子连接部152具有一定的厚度，满足极耳连接部151与极耳131和端子连接部152与电极端子140间的连接需要，另一方面，能够防止极耳连接部151、端子连接部152、弯折部153处的厚度过大，占用电池内的空间，造成电池能量密度下降。By limiting the thickness of the terminal connecting portion 152 , the bent portion 153 , and the tab connecting portion 151 , on the one hand, the tab connecting portion 151 and the terminal connecting portion 152 can have a certain thickness that satisfies the requirements between the tab connecting portion 151 and the pole. The connection between the lug 131 and the terminal connecting part 152 and the electrode terminal 140 is required. On the other hand, it can prevent the lug connecting part 151, the terminal connecting part 152 and the bending part 153 from being too thick and occupying the space in the battery, causing Battery energy density decreases.
可选地，满足，0.5mm≤D1≤D3≤D2≤2.5mm、1mm≤D1≤D3≤D2≤2mm、1.5mm≤D1≤D3≤D2≤2mm、1.8mm≤D1≤D3≤D2≤2mm、1mm≤D1≤D3≤D2≤1.3mm。Optionally, satisfy: 0.5mm≤D1≤D3≤D2≤2.5mm, 1mm≤D1≤D3≤D2≤2mm, 1.5mm≤D1≤D3≤D2≤2mm, 1.8mm≤D1≤D3≤D2≤2mm, 1mm≤D1≤D3≤D2≤1.3mm.
如图5、图7及图11所示，在本申请一些可选实施方式中，沿第二方向(图中z轴方向)上，极耳连接部151的尺寸大于端子连接部152的尺寸，第二方向垂直于第一方向及厚度方向。As shown in Figures 5, 7 and 11, in some optional embodiments of the present application, along the second direction (z-axis direction in the figure), the size of the tab connection part 151 is larger than the size of the terminal connection part 152, The second direction is perpendicular to the first direction and the thickness direction.
通过使端子连接部152在第二方向上的尺寸减小，能够在转接部件150安装时，第二方向上具有较大的冗余空间，便于调整端子连接部152与电极端子140间的相对位置，提高安装精度。By reducing the size of the terminal connection part 152 in the second direction, when the adapter component 150 is installed, a larger redundant space can be provided in the second direction, which facilitates adjustment of the relative position between the terminal connection part 152 and the electrode terminal 140 position to improve installation accuracy.
如图5、图7及图11所示，在本申请一些可选实施方式中，沿第二方向，端子连接部152的尺寸为D4，极耳连接部151的尺寸为D5，满足，0＜D5-D4≤0.5mm。As shown in Figure 5, Figure 7 and Figure 11, in some optional embodiments of the present application, along the second direction, the size of the terminal connection part 152 is D4, and the size of the tab connection part 151 is D5, satisfying, 0< D5-D4≤0.5mm.
通过对第二方向上端子连接部152和极耳连接部151宽度的限定，一方面，能够实现端子连接部152在第二方向上冗余；另一方面，能够能够防止端子连接部152在第二方向上的宽度过小，影响端子连接部152与电极端子140相连接。By limiting the width of the terminal connection portion 152 and the tab connection portion 151 in the second direction, on the one hand, the terminal connection portion 152 can be made redundant in the second direction; on the other hand, it can prevent the terminal connection portion 152 from being in the second direction. The width in the two directions is too small, which affects the connection between the terminal connecting portion 152 and the electrode terminal 140 .
可选地，满足，0.1mm≤D5-D4≤0.5mm、0.2mm≤D5-D4≤0.4mm、0.25mm≤D5-D4≤0.3mm、0.3mm≤D5-D4≤0.35mm。Optionally, 0.1mm≤D5-D4≤0.5mm, 0.2mm≤D5-D4≤0.4mm, 0.25mm≤D5-D4≤0.3mm, 0.3mm≤D5-D4≤0.35mm.
如图5、图7、图9及图10所示，在本申请一些可选实施方式中，极耳连接部151包括靠近极耳131一侧的第一表面155和远离极耳131一侧的第二表面156，端子连接部152包括靠近电极端子140一侧的第三表面157和远离电极端子140一侧的第四表面158，沿厚度方向，第一表面155到第四表面158的尺寸为H1，满足，H1≥D2，和/或，沿厚度方向，第二表面156到第三表面157的尺寸为H2，满足，H2≥D1。As shown in Figures 5, 7, 9 and 10, in some optional embodiments of the present application, the tab connection part 151 includes a first surface 155 on the side close to the tab 131 and a first surface 155 on the side away from the tab 131. The second surface 156 and the terminal connection part 152 include a third surface 157 on a side close to the electrode terminal 140 and a fourth surface 158 on a side away from the electrode terminal 140. Along the thickness direction, the dimensions of the first surface 155 to the fourth surface 158 are H1 satisfies H1 ≥ D2, and/or the dimensions of the second surface 156 to the third surface 157 along the thickness direction are H2 and satisfies H2 ≥ D1.
通过对第一表面155、第二表面156、第三表面157和第四表面158间距离的限定，能够使转接部件150在叠放时，厚度方向上前一个转接部件150的极耳连接部151高于后一个转接部件150的端子连接部152，即形成叠放空间，便于后一个转接部件150放置，或使转接部件150在叠放时，厚度方向上前一个转接部件150的端子连接部152高于后一个转接部件150的极耳连接部151，即形成叠放空间，便于后一个转接部件150放置。By defining the distance between the first surface 155 , the second surface 156 , the third surface 157 and the fourth surface 158 , when the adapter components 150 are stacked, the tabs of the previous adapter component 150 in the thickness direction can be connected. The portion 151 is higher than the terminal connecting portion 152 of the subsequent adapter component 150, thereby forming a stacking space to facilitate the placement of the subsequent adapter component 150, or to enable the adapter component 150 to overlap the previous adapter component in the thickness direction when stacked. The terminal connecting portion 152 of 150 is higher than the tab connecting portion 151 of the subsequent adapter component 150, which forms a stacking space to facilitate the placement of the subsequent adapter component 150.
在本申请一些可选实施方式中，提供了一种电池单体，包括外壳、电极端子140、电极组件130和上述转接部件150。外壳设置有容纳腔，电极端子140设于外壳，电极组件130容纳于容纳腔，转接部件150，用于连接电极端子140及电极组件130。In some optional embodiments of the present application, a battery cell is provided, including a casing, an electrode terminal 140, an electrode assembly 130, and the above-mentioned adapter component 150. The housing is provided with a receiving cavity, the electrode terminal 140 is provided in the housing, the electrode assembly 130 is received in the receiving cavity, and the adapter component 150 is used to connect the electrode terminal 140 and the electrode assembly 130 .
在本申请一些可选实施方式中，提供了一种电池，包括上述电池单体。In some optional embodiments of the present application, a battery is provided, including the above-mentioned battery cell.
在本申请一些可选实施方式中，提供了一种用电设备，包括上述电池单体，电池单体用于提供电能。In some optional embodiments of the present application, an electrical device is provided, including the above-mentioned battery cell, and the battery cell is used to provide electric energy.
在本申请一些可选实施方式中，提供了一种电池单体的转接部件150，包括极耳连接部151、端子连接部152和弯折部153。极耳连接部151用于连接电池单体的极耳131，端子连接部152用于连接电池单体的电极端子140，在极耳连接部151的厚度方向上，端子连接部152与极耳连接部151错位设置，弯折部153连接极耳连接部151和端子连接部152，弯折部153从极耳连接部151朝向端子连接部152倾斜设置，弯折部153与所述厚度方向的夹角为α，满足，43°≤α≤48°。端子连接部152、弯折部153、极耳连接部151沿第一方向依次排布，第一方向与厚度方向垂直，端子连接部152的厚度为D1，极耳连接部151的厚度为D2，弯折部153的厚度为D3，满足，D1≤D3≤D2。端子连接部152的厚度为D1，极耳连接部151的厚度为D2，弯折部153的厚度为D3，满足，1mm≤D1≤D3≤D2≤3mm。沿第二方向上，极耳连接部151的尺寸大于端子连接部152的尺寸，第二方向垂直于第一方向及厚度方向，沿第二方向，端子连接部152的尺寸为D4，极耳连接部151的尺寸为D5，满足，0.3mm≤D5-D4≤0.5mm。 极耳连接部151包括靠近极耳131一侧的第一表面155和远离极耳131一侧的第二表面156，端子连接部152包括靠近电极端子140一侧的第三表面157和远离电极端子140一侧的第四表面158，沿厚度方向，第一表面155到第四表面158的尺寸为H1，满足，H1≥D2，和/或，沿厚度方向，第二表面156到第三表面157的尺寸为H2，满足，H2≥D1。In some optional embodiments of the present application, a battery cell adapter component 150 is provided, including a tab connection part 151 , a terminal connection part 152 and a bending part 153 . The tab connection part 151 is used to connect the tab 131 of the battery cell, and the terminal connection part 152 is used to connect the electrode terminal 140 of the battery cell. In the thickness direction of the tab connection part 151, the terminal connection part 152 is connected to the tab. The bending portion 151 is disposed in an offset position, and the bending portion 153 connects the tab connection portion 151 and the terminal connection portion 152. The bending portion 153 is inclined from the tab connection portion 151 toward the terminal connection portion 152. The bending portion 153 is sandwiched between the tab connection portion 151 and the terminal connection portion 152 in the thickness direction. The angle is α, which satisfies 43°≤α≤48°. The terminal connection part 152, the bending part 153, and the tab connection part 151 are arranged in sequence along the first direction, which is perpendicular to the thickness direction. The thickness of the terminal connection part 152 is D1, and the thickness of the tab connection part 151 is D2. The thickness of the bent portion 153 is D3, which satisfies D1≤D3≤D2. The thickness of the terminal connection part 152 is D1, the thickness of the tab connection part 151 is D2, and the thickness of the bending part 153 is D3, which satisfies 1 mm ≤ D1 ≤ D3 ≤ D2 ≤ 3 mm. Along the second direction, the size of the tab connecting portion 151 is larger than the size of the terminal connecting portion 152. The second direction is perpendicular to the first direction and the thickness direction. Along the second direction, the size of the terminal connecting portion 152 is D4, and the tab connecting portion 151 has a size of D4. The size of the part 151 is D5, which satisfies 0.3mm≤D5-D4≤0.5mm. The tab connection portion 151 includes a first surface 155 on a side close to the tab 131 and a second surface 156 on a side away from the tab 131 . The terminal connection portion 152 includes a third surface 157 on a side close to the electrode terminal 140 and a third surface 157 on a side away from the electrode terminal. The fourth surface 158 on the 140 side, along the thickness direction, the size of the first surface 155 to the fourth surface 158 is H1, satisfying, H1≥D2, and/or, along the thickness direction, the second surface 156 to the third surface 157 The size of is H2, satisfying, H2≥D1.
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件，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。Although the application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the application, in particular provided that no structural conflicts exist , the technical features mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (12)

  1. 一种电池单体的转接部件，包括：An adapter component for a battery cell, including:
    极耳连接部，用于连接电池单体的极耳；The tab connection part is used to connect the tabs of the battery cells;
    端子连接部，用于连接电池单体的电极端子，在所述极耳连接部的厚度方向上，所述极耳连接部与所述端子连接部错位设置；以及A terminal connection portion is used to connect the electrode terminal of the battery cell, and the tab connection portion and the terminal connection portion are offset in the thickness direction of the tab connection portion; and
    弯折部，连接所述极耳连接部和所述端子连接部。The bent portion connects the tab connecting portion and the terminal connecting portion.
  2. 根据权利要求1所述的转接部件，其中，所述弯折部从所述极耳连接部朝向所述端子连接部倾斜设置。The adapter component according to claim 1, wherein the bending portion is inclined from the tab connecting portion toward the terminal connecting portion.
  3. 根据权利要求2所述的转接部件，其中，所述弯折部与所述厚度方向的夹角为α，满足，30°≤α≤60°。The adapter component according to claim 2, wherein an angle between the bending portion and the thickness direction is α, satisfying 30°≤α≤60°.
  4. 根据权利要求1-3任一项所述的转接部件，其中，所述端子连接部、所述弯折部、所述极耳连接部沿第一方向依次排布，所述第一方向与所述厚度方向垂直。The adapter component according to any one of claims 1 to 3, wherein the terminal connection part, the bending part, and the tab connection part are arranged in sequence along a first direction, and the first direction is The thickness direction is vertical.
  5. 根据权利要求1-4任一项所述的转接部件，其中，所述端子连接部的厚度为D1，所述极耳连接部的厚度为D2，所述弯折部的厚度为D3，满足，D1≤D3≤D2。The adapter component according to any one of claims 1 to 4, wherein the thickness of the terminal connection part is D1, the thickness of the tab connection part is D2, and the thickness of the bending part is D3, satisfying , D1≤D3≤D2.
  6. 根据权利要求5所述的转接部件，其中，所述端子连接部的厚度为D1，所述极耳连接部的厚度为D2，所述弯折部的厚度为D3，满足，0.3mm≤D1≤D3≤D2≤3mm。The adapter component according to claim 5, wherein the thickness of the terminal connection part is D1, the thickness of the tab connection part is D2, and the thickness of the bending part is D3, satisfying 0.3mm≤D1 ≤D3≤D2≤3mm.
  7. 根据权利要求4所述的转接部件，其中，沿第二方向上，所述极耳连接部的尺寸大于所述端子连接部的尺寸，所述第二方向垂直于所述第一方向及所述厚度方向。The adapter component according to claim 4, wherein a size of the tab connection part is larger than a size of the terminal connection part along a second direction, the second direction being perpendicular to the first direction and the The thickness direction.
  8. 根据权利要求7所述的转接部件，其中，沿所述第二方向，所述端子连接部的尺寸为D4，所述极耳连接部的尺寸为D5，满足，0＜D5-D4≤ 0.5mm。The adapter component according to claim 7, wherein along the second direction, the size of the terminal connection part is D4, and the size of the tab connection part is D5, satisfying, 0<D5-D4≤0.5 mm.
  9. 根据权利要求5-8任一项所述的转接部件，其中，所述极耳连接部包括靠近所述极耳一侧的第一表面和远离所述极耳一侧的第二表面，所述端子连接部包括靠近所述电极端子一侧的第三表面和远离所述电极端子一侧的第四表面，沿所述厚度方向，所述第一表面到所述第四表面的尺寸为H1，满足，H1≥D2，和/或，The adapter component according to any one of claims 5 to 8, wherein the tab connection portion includes a first surface close to the tab side and a second surface away from the tab side, so The terminal connection part includes a third surface on a side close to the electrode terminal and a fourth surface on a side away from the electrode terminal. Along the thickness direction, a dimension from the first surface to the fourth surface is H1 , satisfies H1≥D2, and/or,
    沿所述厚度方向，所述第二表面到所述第三表面的尺寸为H2，满足，H2≥D1。Along the thickness direction, the size from the second surface to the third surface is H2, satisfying H2≥D1.
  10. 一种电池单体，包括：A battery cell including:
    外壳，设置有容纳腔；The shell is provided with a receiving cavity;
    电极端子，设于所述外壳；Electrode terminals are provided on the housing;
    电极组件，容纳于所述容纳腔；An electrode assembly, accommodated in the accommodation cavity;
    如权利要求1-9任一项所述的转接部件，用于连接所述电极端子及所述电极组件。The adapter component according to any one of claims 1 to 9, used to connect the electrode terminal and the electrode assembly.
  11. 一种电池，包括如权利要求10所述的电池单体。A battery including the battery cell according to claim 10.
  12. 一种用电设备，包括如权利要求10所述的电池单体，所述电池单体用于提供电能。An electrical device includes the battery cell as claimed in claim 10, wherein the battery cell is used to provide electrical energy.
PCT/CN2022/118347 2022-09-13 2022-09-13 Adapter component, battery cell, battery and electric device WO2024055144A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108428852A (en) * 2018-01-12 2018-08-21 宁德时代新能源科技股份有限公司 Secondary battery and automobile
CN211629211U (en) * 2020-03-12 2020-10-02 宁德时代新能源科技股份有限公司 Secondary battery, battery module, and device using secondary battery as power supply
CN216054941U (en) * 2021-08-31 2022-03-15 宁德时代新能源科技股份有限公司 Battery cell, battery and electric equipment
CN217158580U (en) * 2022-03-24 2022-08-09 宁德时代新能源科技股份有限公司 Current collecting component, battery monomer, battery and electric equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108428852A (en) * 2018-01-12 2018-08-21 宁德时代新能源科技股份有限公司 Secondary battery and automobile
CN211629211U (en) * 2020-03-12 2020-10-02 宁德时代新能源科技股份有限公司 Secondary battery, battery module, and device using secondary battery as power supply
CN216054941U (en) * 2021-08-31 2022-03-15 宁德时代新能源科技股份有限公司 Battery cell, battery and electric equipment
CN217158580U (en) * 2022-03-24 2022-08-09 宁德时代新能源科技股份有限公司 Current collecting component, battery monomer, battery and electric equipment

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