WO2024060482A1 - 集流部件、电池及电池模组 - Google Patents

集流部件、电池及电池模组 Download PDF

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Publication number
WO2024060482A1
WO2024060482A1 PCT/CN2023/074497 CN2023074497W WO2024060482A1 WO 2024060482 A1 WO2024060482 A1 WO 2024060482A1 CN 2023074497 W CN2023074497 W CN 2023074497W WO 2024060482 A1 WO2024060482 A1 WO 2024060482A1
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WO
WIPO (PCT)
Prior art keywords
area
current collecting
region
current
thickness
Prior art date
Application number
PCT/CN2023/074497
Other languages
English (en)
French (fr)
Inventor
熊永锋
徐卫东
Original Assignee
厦门海辰储能科技股份有限公司
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
Priority claimed from CN202211166764.9A external-priority patent/CN115548346B/zh
Priority claimed from CN202222598483.2U external-priority patent/CN218414962U/zh
Application filed by 厦门海辰储能科技股份有限公司 filed Critical 厦门海辰储能科技股份有限公司
Priority to EP23825357.9A priority Critical patent/EP4366071A1/en
Priority to AU2023286001A priority patent/AU2023286001A1/en
Priority to US18/391,141 priority patent/US20240162576A1/en
Publication of WO2024060482A1 publication Critical patent/WO2024060482A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a current collecting component, a battery and a battery module.
  • the main components of the battery include the casing, the end cover assembly, the current collecting member, the electrode assembly, etc.
  • the current collecting member is used to connect the end cover assembly and the tab of the electrode assembly to achieve current conduction.
  • the current collector component In the battery production process, in order to ensure the welding processability of the current collector component and the electrode assembly, the current collector component needs to have a certain flow capacity. Since the internal space of the battery is limited, certain requirements are usually placed on the thickness of the current collector component. But in fact, when the thickness of the current collecting component increases, the required welding power will be higher, which will not only affect the welding processing efficiency to a certain extent, but also increase the welding processing cost.
  • this application provides a current collecting component, including:
  • a current collecting portion including a current collecting area and at least one electrical connection area
  • a connecting part, the connecting part is connected to the current collecting area
  • the thickness of the current collection region is greater than the thickness of the electrical connection region.
  • the connecting part can be connected to the current collecting part through the current collecting area to form an integrated structure, and since the thickness of the current collecting area is greater than the thickness of the electrical connection area, there is a smaller thickness of the electrical connection at this time.
  • the area is not only convenient for welding connection with the electrode assembly, but also requires low welding power during welding processing, which helps to reduce processing costs and energy consumption and improve processing efficiency.
  • the thicker current collecting area can be used very well. It can carry large current from the electrical connection area, so that the current collecting component has a certain overcurrent capability. That is to say, the current collecting component of the above solution has better processability and the overall thickness design is more optimized, which can meet the battery installation needs with limited internal space.
  • the current collecting portion includes two electrical connection areas, and the two electrical connection areas are connected to each other via the current collecting area.
  • the thickness of the current collection region is more than twice the thickness of the electrical connection region. Since two electrical connection areas are provided and the two electrical connection areas are connected to each other via the current collecting area, when the two electrical connecting areas are respectively connected to the electrode assembly, the two electrical connecting areas are connected in parallel to the current collecting area and the electrode. between components, and because the thickness of the current collection region is more than twice the thickness of a single electrical connection region, the thicker current collection region can carry current from the two electrical connection regions.
  • the current collecting component includes a first current collecting member and a second current collecting member arranged in a stack, and the first current collecting member includes a first connection area, a first current collecting subarea and the Two electrical connection areas, the two electrical connection areas are connected to each other via the first current collector area, the second current collector includes a second connection area and a second current collector area, the first The connection area is electrically connected to the second connection area to form the connection part, and the first current collector sub-area is electrically connected to the second current collector sub-area. to form the collection area.
  • the second current collecting sub-region when viewed from the thickness direction of the current collecting component, does not coincide with the electrical connection region.
  • the first current collector sub-region is welded to the second current collector sub-region, and the first connection region is welded to the second connection region.
  • the first connection area, the first current collector sub-area, the two electrical connection areas, the second connection area and the second current collector sub-area have the same thickness. .
  • one end of the first connecting area is connected to the first current collecting sub-area, and one end of the second connecting area is connected to the second collecting sub-area.
  • the current subregions are connected, and the first connection region and the second connection region each include at least one bending region. When viewed from the thickness direction of the current collecting component, the at least one of the first connection region The bending area overlaps the at least one bending area of the second connecting area.
  • the first connection area and the second connection area each include a bending area, and the bending area of the first connection area is connected to the first current collecting sub-area, and the The bending area of the second connecting area is connected to the second current collecting sub-area.
  • both the first connection area and the second connection area include more than two bending areas, and the two or more bending areas of the first connection area extend along the first The extension direction of the connecting area is arranged at intervals, the two or more bending areas of the second connecting area are arranged at intervals along the extension direction of the second connecting area, and the two or more bending areas of the first connecting area are arranged at intervals.
  • One bending area in the area is connected to the first current collecting sub-area, and one bending area among the two or more bending areas in the second connecting area is connected to the second current collecting sub-area.
  • this application also provides a battery, including:
  • the current collecting component as described above, the current collecting component is accommodated in the housing, and the at least one An electrical connection area is electrically connected to the electrode assembly.
  • the at least one electrical connection area has a protrusion protruding toward the electrode assembly.
  • this application also provides a battery, including:
  • the current collecting component is contained in the housing, and the two electrical connection areas are electrically connected to the electrode assembly.
  • the two electrical connection areas each have a protrusion protruding toward the electrode assembly.
  • the second current collector region is located on a surface of the first current collector region facing away from the electrode assembly along a thickness direction of the current collector component.
  • the second current collecting sub-region is located on a surface of the first current collecting sub-region facing the electrode assembly along the thickness direction of the current collecting component, and the height of the protrusion is greater than the height of the protrusion. Describe the thickness of the second current collecting sub-region.
  • the battery further includes an end cap assembly that closes the opening, the end cap assembly includes a terminal, and the terminal is electrically connected to the connecting portion.
  • the current collecting component is used as a positive electrode current collecting component
  • the terminal is used as a positive electrode terminal
  • the current collecting component is located between the terminal and the electrode assembly
  • the thickness of the current collecting area is 0.4mm to 0.7mm
  • the thickness of the electrical connection area is 0.3mm to 0.4mm
  • the thickness difference between the current collecting area and the electrical connection area is 0.1mm to 0.4mm. between.
  • the current collecting component is used as a negative current collecting component
  • the terminal is used as a negative terminal
  • the current collecting component is located between the terminal and the electrode assembly
  • the thickness of the current collecting area is 0.4 mm to 0.5 mm
  • the thickness of the electrical connection area is 0.2 mm to 0.3 mm
  • the difference in thickness between the current collecting area and the electrical connection area is between 0.1 mm and 0.3 mm.
  • this application also provides a battery module, which includes the battery as described above.
  • Figure 1 is an assembly structural diagram of the current collecting component in this application.
  • Figure 2 is an exploded structural diagram of Figure 1;
  • FIG3 is a schematic structural diagram of a first current collecting member shown from one viewing angle
  • Figure 4 is a schematic structural diagram of the first current collector from another perspective
  • FIG5 is a partial enlarged structural diagram of point A in FIG2;
  • Figure 6 is a three-dimensional structural view of a cylindrical battery according to an embodiment
  • FIG7 is a top view of the structure of FIG6;
  • Figure 8 is a cross-sectional structural view at B-B in Figure 7.
  • 100 current collecting component; 10: first current collecting piece; 11: first current collecting sub-area; 111: first notch; 12: first connecting area; 122: third notch; 123: bending area; 13: electrical connecting area; 131: protrusion; 20: second current collecting piece; 21: second current collecting sub-area; 211: second notch; 22: second connecting area; 222: fourth notch; 101: adapter port; 102: foolproof notch; 200: cylindrical battery; 210: housing; 220: end cap assembly; 221: terminal; 230: electrode assembly; H1: first thickness; H2: second thickness.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the present application provides a battery, which may specifically be a cylindrical battery 200 . It includes an end cap assembly 220, a housing 210, an electrode assembly 230 and an electrolyte.
  • the housing 210 is provided with a connected opening and a receiving cavity. During installation, the electrolyte is flushed into the electrode assembly 230, and then the electrode assembly 230 is loaded into the receiving cavity through the opening, and then the end cover assembly 220 is sealed and installed with the opening.
  • the packaged cylindrical battery 200 can be obtained.
  • the cylindrical battery 200 also includes other components, such as explosion-proof valves, etc., which are not related to the technical solution of the present application and will not be introduced and described here.
  • the electrode assembly 230 includes a positive electrode tab and a negative electrode tab; the end cover assembly 220 covers the opening of the housing 210, the positive electrode current collecting component is connected to the positive electrode tab, and the negative electrode current collecting component is connected to the negative electrode tab.
  • the end cap assembly 220 includes a top cover body, with positive terminals and negative terminals spaced on the top cover body; the current collecting component 100 includes a positive current collecting component and a negative current collecting component, the positive current collecting component is connected to the positive terminal, and the negative current collecting component Connect to the negative terminal.
  • the electrode assembly 230 is composed of a positive electrode piece, a negative electrode piece and a separator.
  • the battery mainly depends on It works by moving metal ions between the positive and negative electrodes.
  • 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 that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that is coated with the positive electrode active material layer. Fluid, the positive electrode current collector without the positive electrode active material layer is used as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and 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 positive electrode current collector that is not coated with the negative electrode active material layer protrudes from the positive electrode collector that is coated with the negative electrode active material layer. Fluid, the positive electrode current collector that is not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can 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.
  • the electrode assembly 230 may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • a current collecting component 100 is shown in an embodiment of the present application, which includes a current collecting part and a connecting part.
  • the current collecting part includes a current collecting area and at least one electrical connection area 13; the connection part is connected to the current collecting area; wherein the thickness of the current collecting area is greater than the thickness of the electrical connection area 13.
  • the connecting part can be connected to the current collecting part through the current collecting area to form an integrated structure, and due to the thickness of the current collecting area Greater than the thickness of the electrical connection area 13, the electrical connection area 13 with a smaller thickness is not only convenient for welding connection with the electrode assembly 230, but also requires low welding power during welding processing, thereby helping to reduce processing costs and energy consumption.
  • the thicker current collecting area can well carry the large current from the electrical connection area 13 (that is, the large current caused by the enlargement of the cylindrical battery 200), so that the current collecting component 100 has certain overcurrent capability. That is to say, the current collecting component 100 of the above solution has better processability and the overall thickness design is more optimized. It can meet the battery installation needs with limited internal space.
  • the current collection part includes two electrical connection areas 13, and the two electrical connection areas 13 are connected to each other via the current collection area. Furthermore, the thickness of the current collecting region is more than twice the thickness of the electrical connection region 13 . Since two electrical connection areas 13 are provided and connected to each other through the current collecting area, when the two electrical connection areas 13 are connected to the electrode assembly 230 respectively, the two electrical connection areas 13 are connected in parallel. between the current collecting area and the electrode assembly 230. Moreover, since the thickness of the current collecting area is more than twice the thickness of the single electrical connection area 13, the thicker current collecting area can carry the current from the two electrical connection areas 13. .
  • the current collecting component 100 includes a first current collecting part 10 and a second current collecting part 20 which are stacked, the first current collecting part 10 includes a first connection area 12, a first current collecting sub-area 11 and two electrical connection areas 13, the two electrical connection areas 13 are connected to each other via the first current collecting sub-area 11, the second current collecting part 20 includes a second connection area 22 and a second current collecting sub-area 21, the first connection area 12 is electrically connected to the second connection area 22 to form a connection portion, and the first current collecting sub-area 11 is electrically connected to the second current collecting sub-area 21 to form a current collecting area.
  • the overall thickness of the stacked first current collector region 11 and the second current collector region 21 can be greater than the thickness of the electrical connection region 13 , thereby realizing a thickness difference design of the current collector component 100 to meet the needs of smaller welding power. It is necessary to weld the electrical connection area 13 to the electrode assembly 230 and at the same time increase the thickness of the current collecting area to enable the current collecting component 100 to obtain overcurrent capability.
  • each second current collecting member 20 may be all stacked and welded on the same side of the first current collecting member 10 , or may be stacked separately. Welded on the two opposite sides of the first current collector 10, the specific selection can be made according to actual needs.
  • first connection area 12, the first current collector sub-area 11, the two electrical connection areas 13, the second connection area 22 and the second current collector sub-area 21 have the same thickness. Consistent thickness design ensures consistent processability and mechanical properties.
  • the electrical connection area 13 can be formed from the first current collector area 11 by stamping or other methods. It is integrally processed and formed, and can also be assembled and fixed on the first current collecting sub-area 11 in a detachable manner.
  • the electrical connection area 13 is integrally stamped and formed on the first current collecting sub-area 11 using a stamping process, so as to ensure better structural integrity.
  • the second current collecting sub-region 21 does not overlap with the electrical connection region 13 , so as to avoid the second current collecting sub-region 21 blocking the electrical connection region 13 .
  • the second connection area 22 is stacked with the first connection area 12, and the second connection area 22 is electrically connected to the first connection area 12. This can further improve the connection integrity and reliability between the first current collector 10 and the second current collector 20.
  • the second current collector region 21 is welded to the first current collector region 11, and the second connection region 22 is welded to the first connection region 12.
  • the welding method can be any one of ultrasonic welding, resistance welding, laser welding, etc. for connection and fixing.
  • first connection area 12 is connected to the first current collector sub-area 11
  • second connection area 22 is connected to the second current collector sub-area 21.
  • both the first connection area 12 and the second connection area 22 include at least one bending area 123.
  • at least one bending area 123 of the first connection area 12 and the second connection area 22 At least one bending area 123 of overlaps. Therefore, the first connection area 12 and the second connection area 22 can be synchronously bent in the same direction through the bending area 123 to obtain elastic force, so as to ensure reliable contact between the connection part and the terminal 221 during installation.
  • first connection area 12 and the second connection area 22 each include a bending area 123.
  • the bending area 123 of the first connection area 12 is connected to the first current collecting sub-area 11.
  • the bending area of the second connection area 22 123 is connected to the second current collection sub-area 21.
  • both the first connection area 12 and the second connection area 22 include more than two bending areas 123, and the two or more bending areas 123 of the first connection area 12 are spaced apart along the extension direction of the first connection area 12, The two or more bending areas 123 of the second connecting area 22 are spaced apart along the extending direction of the second connecting area 22 . are arranged at intervals, one of the two or more bending areas 123 of the first connection area 12 is connected to the first current collecting sub-area 11, and one of the two or more bending areas 123 of the second connection area 22 is connected to the first current collecting sub-area 11. The folding area 123 is connected to the second current collecting sub-area 21 .
  • the bending area 123 may be a recess or a crease line provided on the first connection area 12 and the second connection area 22 .
  • the first connection area 12 can be folded or bent relative to the first current collecting sub-area 11 through the bending area 123, and the second connecting area 22 can also be folded or bent relative to the second current collecting sub-area 21 through the bending area 123. Bending; or the first connection 12 and the second connection area 22 are folded or bent through the bending area 123 itself. Therefore, the first connection area 12 and the second connection area 22 will have a certain elasticity after being bent, thereby ensuring that the connection portions are fully connected or in conflict with the battery terminals 221 under the action of their own elasticity.
  • the number of bending times of the first connection area 12 and the second connection area 22 can be adjusted.
  • the elasticity of the bent first connecting area 12 and the second connecting area 22 will also change accordingly (for example, the elasticity increases).
  • the more than two bending regions 123 are arranged starting from the connection between the first connection region 12 and the first current collector region 11 and the connection between the second connection region 22 and the second current collector region 21 and are arranged at intervals along the extension direction of the first connection region 12 and the second connection region 22.
  • the above embodiment makes it easier to bend the first connection region 12 and the second connection region 22 from the connection, thereby reducing the difficulty of the bending operation; at the same time, the above bending method can also reserve sufficient bending space for the first current collector region 11 and the first connection region 12 and the second current collector region 21 and the second connection region 22, thereby avoiding interference during bending.
  • the width direction of the first connection area 12 at least one end of the bending area 123 is recessed with a third notch 122 , and the width direction of the first connection area 12 is perpendicular to the extension direction of the first connection area 12 . This allows the first connecting area 12 to be bent along the bending area 123 more easily and smoothly.
  • the first current collecting sub-area 11 is provided with a first notch 111
  • the second current collecting sub-area 21 is provided with a second notch 211 that is adapted to the shape and position of the first notch 111 .
  • the setting of a gap 111 can avoid the explosion-proof valve and avoid installation interference between the current collecting component 100 and the explosion-proof valve.
  • the second notch 211 makes the second current collecting sub-region 21 easier to fold.
  • first connection area 12 is provided with at least one third notch 122
  • second connection area 22 is provided with at least one fourth notch 222 that is adapted to the shape and position of the third notch 122 .
  • the design of the third notch 122 and the fourth notch 222 makes it easier for the first connecting area 12 and the second connecting area 22 to be bent in the same direction and with the same amplitude, thereby reducing the difficulty of bending and improving manufacturability.
  • a battery including: a casing 210 having an opening; an electrode assembly 230 accommodated in the casing 210; and a current collecting component 100 accommodated in the casing 210, at least one electrode
  • the connection area 13 is electrically connected to the electrode assembly 230 .
  • At least one electrical connection area 13 has a protrusion protruding toward the electrode assembly 230 . Therefore, the protrusion is convenient for welding with the electrode assembly 230, and the welding area is small, which is beneficial to reducing welding power and energy consumption.
  • both electrical connection areas 13 are electrically connected to the electrode assembly 230 .
  • Both electrical connection areas 13 have protrusions protruding toward the electrode assembly 230 . This can improve the welding strength and connection reliability of the current collecting component 100 and the electrode assembly 230 .
  • the two protrusions are formed into arc-shaped bending structures and are arranged at symmetrical intervals. Welding the protrusions designed with two symmetrical arc-shaped bending structures to the electrode assembly 230 can ensure that the electrode assembly 230 and the current collecting component 100 are welded more stably, and can also ensure that each layer of the electrode assembly 230 has a consistent current.
  • the second current collector region 21 is located on a surface of the first current collector region 11 away from the electrode assembly 230 along the thickness direction of the current collector component 100 .
  • the electrical connection area 13 and the second current collecting sub-area 21 are located on two different sides of the first current collecting sub-area 11, and the second current collecting part 20 and the first current collecting part 10 can be normally connected as one body, and at the same time
  • the second current collector 20 will not interfere with the welding process of the electrical connection area 13 and the electrode assembly 230.
  • the thickness of the electrical connection area 13 can be effectively connected to the electrode assembly 230 by designing a smaller value, thereby saving space.
  • the second current collector region 21 is located on the surface of the first current collector region 11 along the thickness direction of the current collector component 100 toward the electrode assembly 230, and the height of the protrusion is greater than that of the second current collector region 21.
  • the thickness of the flow subregion 21 Therefore, the second current collector region 21 will not interfere with the normal welding of the protrusion (ie, the electrical connection region 13 ) and the electrode assembly 230 .
  • the top surface of the protrusion is a planar structure. Therefore, when the protrusion is welded to the electrode assembly 230 through the top surface, the contact area is large, the welding connection is reliable, and the flatness between the current collecting component 100 and the electrode assembly 230 can be ensured.
  • the first connection area 12 and the second connection area 22 are also provided with adaptation ports 101 .
  • the terminal 221 is installed through the end cover assembly 220.
  • the end cover assembly 220 also includes a lower plastic.
  • the first current collecting part 10 is installed and matched with the lower plastic.
  • the lower plastic is provided with an installation for installing the first current collecting part 10. structure, therefore, by opening the adapter opening 101 in the first connection area 12 and the second connection area 22, the assembly effect of the first current collector 10 and the lower plastic can be more effectively ensured.
  • fool-proof notches 102 are provided at the ends of the first connection area 12 and the second connection area 22, so that the first connection area 12 is connected to the first current collecting sub-area 11 and the second connection area. 22 and the second current collecting sub-area 21 form an asymmetric structure, so that the current collecting component 100 can be installed to prevent fooling.
  • the battery also includes an end cap assembly 220 that closes the opening.
  • the end cap assembly 220 includes a terminal 221, and the terminal 221 is electrically connected to the connection part.
  • the thickness of the current collecting area is set to H1
  • the thickness of the electrical connection area 13 is set to H2.
  • the current collecting component 100 is used as a positive current collecting component, the terminal 221 is used as a positive terminal, and the current collecting component 100 is located between the terminal 221 and the electrode assembly 230; the thickness of the current collecting area is 0.4mm to 0.7mm, The thickness of the electrical connection area 13 is 0.3 mm to 0.4 mm, and the thickness difference between the current collection area and the electrical connection area 13 is between 0.1 mm and 0.4 mm.
  • the above embodiments can fully ensure the installation effect of the current collecting component 100 in the battery.
  • the thickness of the current collecting area of the positive electrode current collecting component is limited to 0.4mm to 0.7mm, and the thickness of the electrical connection area 13 is limited to 0.3mm to 0.4mm.
  • the thickness difference 0.1mm (i.e. The thickness difference between the two is 0.1mm to 0.4mm), avoid the thickness of the current collection area and the electrical connection area 13 being the same.
  • the overcurrent capability of the positive electrode current collecting component can be effectively ensured, and the welding efficiency can also be improved.
  • the current collecting part 100 is used as a negative current collecting part, the terminal 221 is used as a negative terminal, and the current collecting part 100 is located between the terminal 221 and the electrode assembly 230; the thickness of the current collecting area is 0.4mm to 0.5mm, and the electrical connection area 13 The thickness is 0.2mm to 0.3mm, and the thickness difference between the current collection area and the electrical connection area 13 is between 0.1mm and 0.3mm.
  • the thickness of the current collecting area of the negative electrode current collecting component is limited to 0.4mm to 0.5mm, and the thickness of the electrical connection area 13 is limited to 0.2mm to 0.3mm.
  • the overcurrent capability of the negative electrode current collecting component can be effectively ensured, and the welding efficiency can also be improved.
  • this application also provides an electrical device, which includes a battery module.
  • the battery module includes the battery of any of the above embodiments.
  • the battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which are not limited in the embodiments of the present application.
  • the battery 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. According to different packaging methods, batteries are generally divided into three types: cylindrical batteries, square batteries and soft-pack batteries.
  • the battery module mentioned in the embodiments of this application refers to a single physical module that includes one or more batteries to provide higher voltage and capacity.
  • a battery module generally includes a box for packaging one or more batteries. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery.
  • Electrical equipment can be in many forms, such as mobile phones, portable devices, laptops, battery cars, electric cars, ships, spacecraft, electric toys and power tools, etc.
  • spacecraft include airplanes, rockets, space shuttles and space shuttles.
  • spaceships, etc. electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, etc.
  • Power tools and railway power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and planers.

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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

本申请涉及一种集流部件(100)、电池及电池模组，包括：集流部，所述集流部包括集流区和至少一个电连接区(111)；以及连接部，所述连接部与所述集流区连接；其中，所述集流区的厚度大于所述电连接区(111)的厚度。

Description

集流部件、电池及电池模组
本申请要求于2022年9月29日提交中国专利局、申请号为2022225984832、发明名称为“电池模组、电池及集流件”以及2022年9月23日提交中国专利局、申请号为2022111667649、发明名称为“集流组件及电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，特别是涉及一种集流部件、电池及电池模组。
背景技术
近年来，新能源汽车行业得到了空前的发展机遇，而影响新能源汽车的使用性能、续航能力等指标的一个重要因素，便是电池的使用性能与可靠性。电池的主要组成构件包括壳体、端盖组件、集流构件、电极组件等，其中集流构件用于连接端盖组件和电极组件的极耳，以实现电流传导。
在电池生产过程中，为确保集流构件与电极组件焊接可加工性，需要集流构件具备一定的过流能力，而由于电池内部空间有限，因此通常会对集流构件的厚度提出一定要求。但事实上，当集流构件的厚度增加时，所需的焊接功率也会越高，不仅会一定程度影响焊接加工效率，同时焊接加工成本也会升高。
发明内容
基于此，有必要提供一种集流部件、电池及电池模组，旨在解决传统 技术加工能耗大导致成本升高，加工效率低的问题。
一方面，本申请提供一种集流部件，包括：
集流部，所述集流部包括集流区和至少一个电连接区；以及，
连接部，所述连接部与所述集流区连接；
其中，所述集流区的厚度大于所述电连接区的厚度。
上述方案的集流部件加工及安装时，连接部通过集流区能与集流部连接为一体结构，且由于集流区的厚度大于电连接区的厚度，此时具有较小厚度的电连接区不仅便于与电极组件焊接连接，且对焊接加工时所需的焊接功率低，进而有助于降低加工成本和能耗，提高加工效率，与此同时厚度较大的集流区又能够很好的承载来自电连接区的大电流，从而使集流部件具备一定的过流能力。也即上述方案的集流部件在具备更优的可加工性同时整体厚度设计更加优化，能满足内部空间有限的电池安装需要。
下面对本申请的技术方案作进一步的说明：
在其中一个实施例中，所述集流部包括两个电连接区，所述两个电连接区经由所述集流区而彼此连接。在其中一个实施例中，所述集流区的厚度为所述电连接区的厚度的两倍以上。由于设置了两个电连接区且两个电连接区经由集流区而彼此连接，因此，在将两个电连接区分别连接于电极组件时，两个电连接区并联于集流区和电极组件之间，而且，由于集流区的厚度为单个电连接区的厚度的两倍以上，因而，较厚的集流区能够承载来自两个电连接区的电流。
在其中一个实施例中，所述集流部件包括层叠设置的第一集流件和第二集流件，所述第一集流件包括第一连接区、第一集流子区和所述两个电连接区，所述两个电连接区经由所述第一集流子区而彼此连接，所述第二集流件包括第二连接区和第二集流子区，所述第一连接区与所述第二连接区电连接以构成所述连接部，所述第一集流子区与所述第二集流子区电连 接以构成所述集流区。
在其中一个实施例中，从所述集流部件的厚度方向看时，所述第二集流子区与所述电连接区不重合。
在其中一个实施例中，所述第一集流子区与所述第二集流子区焊接连接，所述第一连接区与所述第二连接区焊接连接。
在其中一个实施例中，所述第一连接区、所述第一集流子区、所述两个电连接区、所述第二连接区以及所述第二集流子区具有相同的厚度。
在其中一个实施例中，在所述连接部的延伸方向上，所述第一连接区的一端与所述第一集流子区连接，所述第二连接区的一端与所述第二集流子区连接，且所述第一连接区和所述第二连接区均包括至少一个弯折区，从所述集流部件的厚度方向看时，所述第一连接区的所述至少一个弯折区和所述第二连接区的所述至少一个弯折区重叠。
在其中一个实施例中，所述第一连接区和所述第二连接区均包括一个弯折区，所述第一连接区的弯折区连接于所述第一集流子区，所述第二连接区的弯折区连接于所述第二集流子区。
在其中一个实施例中，所述第一连接区和所述第二连接区均包括两个以上的弯折区，所述第一连接区的所述两个以上弯折区沿所述第一连接区的延伸方向间隔设置，所述第二连接区的所述两个以上弯折区沿所述第二连接区的延伸方向间隔设置，所述第一连接区的所述两个以上弯折区中的一个弯折区连接于所述第一集流子区，所述第二连接区的所述两个以上弯折区中的一个弯折区连接于所述第二集流子区。
另一方面，本申请还提供一种电池，包括：
壳体，具有开口；
电极组件，容纳于所述壳体；以及，
如上所述的集流部件，所述集流部件容纳于所述壳体内，所述至少一 个电连接区与所述电极组件电连接。
在其中一个实施例中，所述至少一个电连接区具有朝向所述电极组件凸出的凸起。
此外，本申请还提供一种电池，包括：
壳体，具有开口；
电极组件，容纳于所述壳体；以及，
如上所述的集流部件，所述集流部件容纳于所述壳体内，所述两个电连接区与所述电极组件电连接。
在其中一个实施例中，所述两个电连接区均具有朝向所述电极组件凸出的凸起。
在其中一个实施例中，所述第二集流子区位于所述第一集流子区的沿所述集流部件的厚度方向背离所述电极组件的表面。
在其中一个实施例中，所述第二集流子区位于所述第一集流子区的沿所述集流部件的厚度方向朝向所述电极组件的表面，所述凸起的高度大于所述第二集流子区的厚度。
在其中一个实施例中，所述电池还包括封闭所述开口的端盖组件，所述端盖组件包括端子，所述端子与所述连接部电连接。
在其中一个实施例中，所述集流部件用作正极集流部件，所述端子用作正极端子，所述集流部件位于所述端子与所述电极组件之间；
所述集流区的厚度为0.4mm至0.7mm，所述电连接区的厚度为0.3mm至0.4mm，且所述集流区与所述电连接区的厚度差在0.1mm至0.4mm之间。
在其中一个实施例中，所述集流部件用作负极集流部件，所述端子用作负极端子，所述集流部件位于所述端子与所述电极组件之间；
所述集流区的厚度为0.4mm至0.5mm，所述电连接区的厚度为0.2mm至0.3mm，且所述集流区与所述电连接区的厚度差在0.1mm至0.3mm之间。
进一步地，本申请还提供一种电池模组，其包括如上所述的电池。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明本申请的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本申请中集流部件的装配结构图；
图2为图1的爆炸结构图；
图3为其中一视角所示的第一集流件的结构示意图；
图4为另一视角所述第一集流件的结构示意图；
图5为图2中A处的局部放大结构图；
图6为一实施例的圆柱电池的立体结构图；
图7为图6的俯视结构图；
图8为图7中B-B处剖面结构图。
附图标记说明：
100：集流部件；10：第一集流件；11：第一集流子区；111：第一缺口；12：第一连接区；122：第三缺口；123：弯折区；13：电连接区；131：凸起；20：第二集流件；21：第二集流子区；211：第二缺口；22：第二连接区；222：第四缺口；101：适配口；102：防呆缺口；200：圆柱电池；210：壳体；220：端盖组件；221：端子；230：电极组件；H1：第一厚度；H2：第二厚度。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的较佳实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。应该理解，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或顺序。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
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。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
如图6至图8所示，本申请实施提供一种电池，该电池具体可以为圆柱电池200。其包括端盖组件220、壳体210、电极组件230和电解液。壳体210设有相连通的开口和容纳腔，安装时电解液冲润于电极组件230内，而后将电极组件230通过开口装入容纳腔内，之后再将端盖组件220与开口密封安装，从而就能够获得封装后的圆柱电池200。
有必要说明的是，实际上圆柱电池200还包括其他组成构件，如防爆阀等，因与本申请技术方案关联度较低，因而在此不作引出并赘述。
电极组件230包括正极极耳和负极极耳；端盖组件220盖设于壳体210的开口处，正极集流部件与正极极耳连接，负极集流部件与负极极耳连接。
端盖组件220包括顶盖本体，顶盖本体上间隔设置有正极端子和负极端子；集流部件100包括正极集流部件和负极集流部件，正极集流部件与正极端子连接，负极集流部件与负极端子连接。
其中，电极组件230由正极极片、负极极片和隔膜组成。电池主要依 靠金属离子在正极极片和负极极片之间移动来工作。正极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，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极极耳。
以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极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，未涂敷负极活性物质层的正极集流体凸出于已涂覆负极活性物质层的正极集流体，未涂敷负极活性物质层的正极集流体作为负极极耳。负极集流体的材料可以为铜，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230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。
具体而言，如图1和图2所示，为本申请一实施例展示的一种集流部件100，其包括集流部以及连接部。集流部包括集流区和至少一个电连接区13；连接部与集流区连接；其中，集流区的厚度大于电连接区13的厚度。
综上，实施本实施例技术方案将具有如下有益效果：上述方案的集流部件100加工及安装时，连接部通过集流区能与集流部连接为一体结构，且由于集流区的厚度大于电连接区13的厚度，此时具有较小厚度的电连接区13不仅便于与电极组件230焊接连接，且对焊接加工时所需的焊接功率低，进而有助于降低加工成本和能耗，提高加工效率，与此同时厚度较大的集流区又能够很好的承载来自电连接区13的大电流(即圆柱电池200大型化导致的大电流)，从而使集流部件100具备一定的过流能力。也即上述方案的集流部件100在具备更优的可加工性同时整体厚度设计更加优化， 能满足内部空间有限的电池安装需要。
较佳地，集流部包括两个电连接区13，两个电连接区13经由集流区而彼此连接。进一步地，集流区的厚度为电连接区13的厚度的两倍以上。由于设置了两个电连接区13且两个电连接区13经由集流区而彼此连接，因此，在将两个电连接区13分别连接于电极组件230时，两个电连接区13并联于集流区和电极组件230之间，而且，由于集流区的厚度为单个电连接区13的厚度的两倍以上，因而，较厚的集流区能够承载来自两个电连接区13的电流。
在一些实施例中，集流部件100包括层叠设置的第一集流件10和第二集流件20，第一集流件10包括第一连接区12、第一集流子区11和两个电连接区13，两个电连接区13经由第一集流子区11而彼此连接，第二集流件20包括第二连接区22和第二集流子区21，第一连接区12与第二连接区22电连接以构成连接部，第一集流子区11与第二集流子区21电连接以构成集流区。
由此，叠层设置的第一集流子区11与第二集流子区21的整体厚度能够大于电连接区13的厚度，从而实现集流部件100的厚度差异设计，满足较小焊接功率使电连接区13与电极组件230焊接的需求，同时增大集流区的厚度以使集流部件100获得过流能力。
需要说明的是，第二集流件20的数量可以为两个或两个以上，各个第二集流件20可以全部层叠焊接于第一集流件10的同一个侧面上，也可以分别层叠焊接在第一集流件10的相对两个侧面上，具体根据实际需要进行选择即可。
进一步地，第一连接区12、第一集流子区11、两个电连接区13、第二连接区22以及第二集流子区21具有相同的厚度。厚度设计一致从而可保证可加工性以及力学性能一致。
可以理解的，电连接区13可以是由第一集流子区11通过冲压等方式 一体加工成型的，也可以是通过可拆卸方式组装固定于第一集流子区11上的。
本实施例中优选电连接区13为采用冲压工艺在第一集流子区11上一体冲压成型的，这样能够保证更佳的结构整体性。
需要说明的是，从集流部件100的厚度方向看时，第二集流子区21与电连接区13不重合。如此能避免第二集流子区21对电连接区13造成遮挡。
此外，在上述任一实施例的基础上，第二连接区22与第一连接区12层叠设置，且第二连接区22与第一连接区12电连接。如此可进一步提高第一集流件10与第二集流件20连接整体性与可靠性。
较佳地，本申请中第二集流子区21与第一集流子区11焊接连接，第二连接区22与第一连接区12焊接连接。以保证更高的连接强度，优化力学性能。可选地，焊接方式可以采用超声波焊、电阻焊、激光焊等其中的任意一种方式连接固定。
请继续参阅图3和图4，在连接部的延伸方向上，第一连接区12的一端与第一集流子区11连接，第二连接区22的一端与第二集流子区21连接，且第一连接区12和第二连接区22均包括至少一个弯折区123，从集流部件的厚度方向看时，第一连接区12的至少一个弯折区123和第二连接区22的至少一个弯折区123重叠。因而第一连接区12和第二连接区22能通过弯折区123进行同步同向弯折而获得弹性力，以确保安装时连接部与端子221接触可靠。
例如，第一连接区12和第二连接区22均包括一个弯折区123，第一连接区12的弯折区123连接于第一集流子区11，第二连接区22的弯折区123连接于第二集流子区21。
亦或者，第一连接区12和第二连接区22均包括两个以上的弯折区123，第一连接区12的两个以上弯折区123沿第一连接区12的延伸方向间隔设置，第二连接区22的两个以上弯折区123沿第二连接区22的延伸方向间 隔设置，第一连接区12的两个以上弯折区123中的一个弯折区123连接于第一集流子区11，第二连接区22的两个以上弯折区123中的一个弯折区123连接于第二集流子区21。
具体地，弯折区123可以是设在第一连接区12和第二连接区22上的凹部或折痕线。第一连接区12可以通过弯折区123相对于第一集流子区11进行折叠或弯折，第二连接区22也可以通过弯折区123相对于第二集流子区21进行折叠或弯折；亦或者第一连接12和第二连接区22通过弯折区123自身进行折叠或弯折。从而使第一连接区12和第二连接区22经过弯折后自身会具有一定的弹力，进而保证连接部在自身弹力的作用下与电池的端子221充分连接或抵触。
更进一步地，通过调整在第一连接区12和第二连接区22上设置的弯折区123的个数，从而能调整第一连接区12和第二连接区22的弯折次数，随着第一连接区12和第二连接区22弯折次数的改变，弯折后的第一连接区12和第二连接区22的弹性也会发生相应的变化(例如：弹力增强)。
进一步地，弯折区123为两个以上时，两个以上弯折区123从第一连接区12与第一集流子区11的连接处以及第二连接区22与第二集流子区21的连接处开始设置并沿第一连接区12和第二连接区22的延伸方向间隔设置。具体地，上述这种实施方式更加便于第一连接区12和第二连接区22从连接处进行弯折，使弯折操作难度降低；同时，上述这种弯折方式也可以为第一集流子区11与第一连接区12以及第二集流子区21与第二连接区22预留出充足的弯折空间，避免在弯折时产生干涉影响。
进一步地，在第一连接区12的宽度方向上，弯折区123的至少一端凹设有第三缺口122，第一连接区12的宽度方向与第一连接区12的延伸方向垂直。可以使得第一连接区12更加容易、顺畅地沿弯折区123进行弯折。
在上述实施例的基础上，第一集流子区11设有第一缺口111，第二集流子区21设有与第一缺口111的形状及位置均相适配的第二缺口211。第 一缺口111的设置能够避空防爆阀，以避免集流部件100与防爆阀出现安装干涉。第二缺口211则使第二集流子区21更便于折叠。
进一步地，第一连接区12设有至少一处第三缺口122，第二连接区22设有与第三缺口122的形状及位置均相适配的至少一个第四缺口222。第三缺口122和第四缺口222的设计更易于使第一连接区12和第二连接区22按照同向和同幅度弯折加工，降低折弯难度，提高可制造性。
在一些实施例中，提供一种电池，包括：壳体210，具有开口；电极组件230，容纳于壳体210；以及集流部件100，集流部件100容纳于壳体210内，至少一个电连接区13与电极组件230电连接。
进一步地，至少一个电连接区13具有朝向电极组件230凸出的凸起。因而凸起方便与电极组件230焊接，且焊接面积小，利于降低焊接功率和能耗。
或者，作为上述实施例的可替代方案，另一些实施例中两个电连接区13均与电极组件230电连接。两个电连接区13均具有朝向电极组件230凸出的凸起。如此可提高集流部件100与电极组件230的焊接强度与连接可靠性。
此外，在上述实施例的基础上，两个凸起均形成为弧形弯折结构，且呈对称间隔排布。采用两个对称弧形弯折结构设计的凸起与电极组件230焊接，能够保证电极组件230与集流部件100焊接更稳定，同时也能保证电极组件230的每一层有大小一致的电流。
在又一些实施例中，第二集流子区21位于第一集流子区11的沿集流部件100的厚度方向背离电极组件230的表面。如此，电连接区13与第二集流子区21分处于第一集流子区11的两个不同侧面上，第二集流件20与第一集流件10可正常连接为一体，同时第二集流件20不会对电连接区13与电极组件230焊接加工产生干涉，电连接区13的厚度设计较小值就能够与电极组件230有效连接，节省空间。
或者，作为上述是实力的可替代方案，第二集流子区21位于第一集流子区11的沿集流部件100的厚度方向朝向电极组件230的表面，凸起的高度大于第二集流子区21的厚度。因而第二集流子区21不会对凸起(即电连接区13)与电极组件230正常焊接产生干涉。
较佳地，凸起的顶面设为平面结构。因而凸起通过顶面与电极组件230焊接连接时，接触面积大，焊接连接可靠，同时能够保证集流部件100与电极组件230之间的平面度。
在一些实施例中，第一连接区12和第二连接区22还均设有适配口101。通过端盖组件220对端子221进行装设，同时端盖组件220还包括下塑胶，第一集流件10与下塑胶安装配合，下塑胶上设有用于装设第一集流件10的安装结构，因此，通过在第一连接区12和第二连接区22上开设适配口101，从而可以更加有效的保证第一集流件10与下塑胶的装配效果。
进一步地，在另一些实施例中在第一连接区12和第二连接区22的端部设有防呆缺口102，使得第一连接区12与第一集流子区11以及第二连接区22与第二集流子区21形成非对称结构，从而使得在装设集流部件100时可以起到防呆作用。
此外，电池还包括封闭开口的端盖组件220，端盖组件220包括端子221，端子221与连接部电连接。
本申请中，集流区的厚度设为H1，电连接区13的厚度设为H2。
在一些实施例中，集流部件100用作正极集流部件，端子221用作正极端子，集流部件100位于端子221与电极组件230之间；集流区的厚度为0.4mm至0.7mm，电连接区13的厚度为0.3mm至0.4mm，且集流区与电连接区13的厚度差在0.1mm至0.4mm之间。上述实施方式可以充分保证集流部件100在电池内的装设效果。将正极集流部件的集流区的厚度限定在0.4mm至0.7mm，将电连接区13的厚度限定在0.3mm至0.4mm，进行厚度确定时，能保证至少存在0.1mm的厚度差(即两者厚度差在0.1mm 至0.4mm之间)，避免集流区与电连接区13的厚度相同。在上述厚度范围内能够有效保证正极集流部件的过流能力，同时也能提高焊接效率。
或者，集流部件100用作负极集流部件，端子221用作负极端子，集流部件100位于端子221与电极组件230之间；集流区的厚度为0.4mm至0.5mm，电连接区13的厚度为0.2mm至0.3mm，且集流区与电连接区13的厚度差在0.1mm至0.3mm之间。
将负极集流部件的集流区的厚度限定在0.4mm至0.5mm，将电连接区13的厚度限定在0.2mm至0.3mm，进行厚度确定时，能保证至少存在0.1mm的厚度差(即两者厚度差在0.1mm至0.3mm之间)，避免集流区与电连接区13的厚度相同。在上述厚度范围内能够有效保证负极集流部件的过流能力，同时也能提高焊接效率。
综上之外，本申请还提供一种用电设备，其包括电池模组，电池模组包括如上任一实施例的电池。
电池可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。按封装的方式不同，电池一般分成三种：圆柱电池200、方形电池和软包电池。
本申请的实施例所提到的电池模组是指包括一个或多个电池以提供更高的电压和容量的单一的物理模块。电池模组一般包括用于封装一个或多个电池的箱体，箱体可以避免液体或其他异物影响电池的充电或放电。
用电设备可以为多种形式，例如，手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，例如，航天器包括飞机、火箭、航天飞机和宇宙飞船等等，电动玩具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，电动工具包括金属切削电动工具、研磨电动工具、装配电 动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准，说明书及附图可以用于解释权利要求的内容。

Claims (20)

  1. 一种集流部件，包括：
    集流部，所述集流部包括集流区和至少一个电连接区；以及，
    连接部，所述连接部与所述集流区连接；
    其中，所述集流区的厚度大于所述电连接区的厚度。
  2. 根据权利要求1所述的集流部件，其中，所述集流部包括两个电连接区，所述两个电连接区经由所述集流区而彼此连接。
  3. 根据权利要求2所述的集流部件，其中，所述集流区的厚度为所述电连接区的厚度的两倍以上。
  4. 根据权利要求2或3所述的集流部件，其中，所述集流部件包括层叠设置的第一集流件和第二集流件，所述第一集流件包括第一连接区、第一集流子区和所述两个电连接区，所述两个电连接区经由所述第一集流子区而彼此连接，所述第二集流件包括第二连接区和第二集流子区，所述第一连接区与所述第二连接区电连接以构成所述连接部，所述第一集流子区与所述第二集流子区电连接以构成所述集流区。
  5. 根据权利要求4所述的集流部件，其中，从所述集流部件的厚度方向看时，所述第二集流子区与所述电连接区不重合。
  6. 根据权利要求4所述的集流部件，其中，所述第一集流子区与所述第二集流子区焊接连接，所述第一连接区与所述第二连接区焊接连接。
  7. 根据权利要求4所述的集流部件，其中，所述第一连接区、所述第一集流子区、所述两个电连接区、所述第二连接区以及所述第二集流子区具有相同的厚度。
  8. 根据权利要求4所述的集流部件，其中，在所述连接部的延伸方向上，所述第一连接区的一端与所述第一集流子区连接，所述第二连接区的一端与所述第二集流子区连接，且所述第一连接区和所述第二连接区均包括至少一个弯折区，从所述集流部件的厚度方向看时，所述第一连接区的所述至少一 个弯折区和所述第二连接区的所述至少一个弯折区重叠。
  9. 根据权利要求8所述的集流部件，其中，所述第一连接区和所述第二连接区均包括一个弯折区，所述第一连接区的弯折区连接于所述第一集流子区，所述第二连接区的弯折区连接于所述第二集流子区。
  10. 根据权利要求8所述的集流部件，其中，所述第一连接区和所述第二连接区均包括两个以上的弯折区，所述第一连接区的所述两个以上弯折区沿所述第一连接区的延伸方向间隔设置，所述第二连接区的所述两个以上弯折区沿所述第二连接区的延伸方向间隔设置，所述第一连接区的所述两个以上弯折区中的一个弯折区连接于所述第一集流子区，所述第二连接区的所述两个以上弯折区中的一个弯折区连接于所述第二集流子区。
  11. 一种电池，包括：
    壳体，具有开口；
    电极组件，容纳于所述壳体；以及，
    如权利要求1至10中任一项所述的集流部件，所述集流部件容纳于所述壳体内，所述至少一个电连接区与所述电极组件电连接。
  12. 根据权利要求11所述的电池，其中，所述至少一个电连接区具有朝向所述电极组件凸出的凸起。
  13. 一种电池，包括：
    壳体，具有开口；
    电极组件，容纳于所述壳体；以及，
    如权利要求4至10任一项所述的集流部件，所述集流部件容纳于所述壳体内，所述两个电连接区与所述电极组件电连接。
  14. 根据权利要求13所述的电池，其中，所述两个电连接区均具有朝向所述电极组件凸出的凸起。
  15. 根据权利要求13或14所述的电池，其中，所述第二集流子区位于所述第一集流子区的沿所述集流部件的厚度方向背离所述电极组件的表面。
  16. 根据权利要求13或14所述的电池，其中，所述第二集流子区位于所述第一集流子区的沿所述集流部件的厚度方向朝向所述电极组件的表面， 所述凸起的高度大于所述第二集流子区的厚度。
  17. 根据权利要求11至16中任一项所述的电池，其中，所述电池还包括封闭所述开口的端盖组件，所述端盖组件包括端子，所述端子与所述连接部电连接。
  18. 根据权利要求17所述的电池，其中，所述集流部件用作正极集流部件，所述端子用作正极端子，所述集流部件位于所述端子与所述电极组件之间；
    所述集流区的厚度为0.4mm至0.7mm，所述电连接区的厚度为0.3mm至0.4mm，且所述集流区与所述电连接区的厚度差在0.1mm至0.4mm之间。
  19. 根据权利要求17所述的电池，其中，所述集流部件用作负极集流部件，所述端子用作负极端子，所述集流部件位于所述端子与所述电极组件之间；
    所述集流区的厚度为0.4mm至0.5mm，所述电连接区的厚度为0.2mm至0.3mm，且所述集流区与所述电连接区的厚度差在0.1mm至0.3mm之间。
  20. 一种电池模组，包括权利要求11至19任意一项所述的电池。
PCT/CN2023/074497 2022-09-23 2023-02-06 集流部件、电池及电池模组 WO2024060482A1 (zh)

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