WO2023231282A1 - 电池、电池模组及电池包 - Google Patents

电池、电池模组及电池包 Download PDF

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Publication number
WO2023231282A1
WO2023231282A1 PCT/CN2022/127668 CN2022127668W WO2023231282A1 WO 2023231282 A1 WO2023231282 A1 WO 2023231282A1 CN 2022127668 W CN2022127668 W CN 2022127668W WO 2023231282 A1 WO2023231282 A1 WO 2023231282A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
rolling groove
housing
negative electrode
battery according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/127668
Other languages
English (en)
French (fr)
Inventor
吴迪
李开波
陈风
何巍
刘金成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
Huizhou Eve Power Co Ltd
Original Assignee
Eve Power Co Ltd
Huizhou Eve Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202210626354.1A external-priority patent/CN114899556A/zh
Priority claimed from CN202221374021.6U external-priority patent/CN218602687U/zh
Application filed by Eve Power Co Ltd, Huizhou Eve Power Co Ltd filed Critical Eve Power Co Ltd
Priority to US18/003,346 priority Critical patent/US20240304907A1/en
Priority to DE212022000380.2U priority patent/DE212022000380U1/de
Priority to EP22822831.8A priority patent/EP4311010A4/en
Publication of WO2023231282A1 publication Critical patent/WO2023231282A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • 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
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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

  • This application relates to the field of battery technology, for example, to a battery, a battery module and a battery pack.
  • the negative busbar and casing of cylindrical batteries are generally made of steel.
  • the electrical connection between the casing and the negative busbar needs to be welded.
  • welding will form on the surface of the steel.
  • There are material differences between the seal and the weld seal and the steel base material, and their own chemical potentials are different.
  • galvanic corrosion is prone to occur.
  • the solder marks will inevitably corrode. Once the solder marks corrode, it will cause potential risks to the overall safety and service life of the battery.
  • This application provides a battery to isolate the welding mark of the negative bus plate and the casing from the external environment, thereby improving the safety and service life of the battery.
  • This application provides a battery module to prevent soldering marks from being corroded and improve the safety and service life of the battery module.
  • This application proposes a battery pack to avoid corrosion of the solder seal and improve the safety and service life of the battery pack.
  • this application provides a battery, including:
  • the negative electrode bus plate is arranged inside the casing, and before the casing is sealed, the negative electrode bus plate is welded and connected to the casing inside the casing.
  • the present application provides a battery module, including the battery as described above.
  • the present application provides a battery pack including at least one set of battery modules as described above.
  • the battery provided by this application can isolate the welding mark of the negative electrode bus plate and the case from the environment outside the battery by welding and connecting the negative electrode bus plate to the case inside the case before the case is sealed, thereby avoiding welding.
  • the seal will corrode in a humid environment, ensuring the safety and service life of the battery.
  • the battery module provided by this application uses the above-mentioned battery to avoid corrosion of the solder seal in a humid environment, ensuring the safety and service life of the battery module.
  • the battery pack provided by this application uses the above-mentioned battery module to avoid corrosion of the solder marks in a humid environment, ensuring the safety and service life of the battery pack.
  • Figure 1 is an exploded view of a battery provided by an embodiment of the present application.
  • Figure 2 is a cross-sectional view of a battery provided by an embodiment of the present application.
  • Figure 3 is a second cross-sectional view of a battery provided by an embodiment of the present application.
  • Figure 4 is a partial enlarged view of C in Figure 3;
  • Figure 5 is a partial enlarged view of position A in Figure 2;
  • Figure 6 is a schematic structural diagram of a negative bus plate provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram 2 of a negative bus plate provided by an embodiment of the present application.
  • Figure 8 is a cross-sectional view of a battery provided by another embodiment of the present application.
  • Figure 9 is a partial enlarged view of position B in Figure 8.
  • Negative bus plate 11. Tab connector; 111. Battery core avoidance groove; 112. Tab extension end; 1121. Chamfer; 113. Strengthening protrusion; 114. Avoidance hole; 12. Shell connector ;121. Buffer ripple;
  • Terminal pole 61. pole part; 611. connection groove; 62. sealing flange; 621. flange notch; 622. annular reinforcing rib; 63. pole plate part; 64. annular avoidance groove;
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body.
  • It can 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.
  • the specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • this embodiment provides a battery, which mainly refers to a large cylindrical battery.
  • the battery mainly includes a battery core 5, a negative electrode busbar 1, a positive busbar 10, a terminal pole 6 and a case.
  • Body 2 in which the battery core 5, the negative electrode busbar 1 and the positive busbar 10 are all arranged inside the housing 2, and the positive busbar 10 is arranged on the upper end surface of the battery core 5 and is electrically connected to the positive electrode lug of the battery core 5 , the negative busbar 1 is attached to the lower end surface of the battery core 5 and is electrically connected to the negative ear of the battery core 5.
  • the negative busbar 1 is also welded to the housing 2 to achieve electrical connection, and the terminal pole 6 is set on the positive busbar 10 and is electrically connected to the positive bus plate 10.
  • the top cover of the upper end surface of the housing 2 is provided with a first through hole, and the terminal pole 6 can pass through the first through hole and extend out of the top cover of the housing 2.
  • connection groove 611 is opened on the side of the terminal pole 6 facing the positive bus plate 10, and the positive bus plate 10 faces the terminal pole.
  • a plug-in protrusion 101 is provided on one side of the column 6, and the plug-in protrusion 101 is inserted into the connection groove 611, thereby realizing the electrical connection between the terminal pole 6 and the positive bus plate 10, and improving the connection between the terminal pole 6 and the positive bus plate 10. The stability and reliability of the connection between the positive bus plates 10.
  • the battery also includes an upper plastic part 7, a lower plastic part 8 and a second sealing ring 9, wherein the upper plastic part 7 Place it on the top cover of the upper end surface of the housing 2.
  • the terminal pole 6 passes through the first penetration hole of the top cover of the housing 2 and the upper plastic part 7, and then bends and flanges outward to press against the upper plastic part 7.
  • the lower plastic part 8 and the second sealing ring 9 are both sleeved on the outer periphery of the terminal pole 6.
  • the plastic part 8 is located between the positive bus plate 10 and the inner wall of the top cover of the housing 2, and the second sealing ring 9 is sandwiched between the terminal pole 6, the inner peripheral wall of the first through hole in the top cover of the housing 2, and the lower plastic part 8 and the inner wall of the top cover of the housing 2, the upper plastic part 7, the second sealing ring 9 and the lower plastic part 8 cooperate with each other to completely separate the terminal pole 6 and the housing 2, ensuring that the terminal pole 6 and the insulation properties between the shell 2.
  • the second sealing ring 9 by providing the second sealing ring 9 , the sealing effect between the terminal pole 6 and the housing 2 is improved.
  • the second sealing ring 9 and the lower plastic part 8 can be an integrally formed part, which not only facilitates processing, but also simplifies the number of parts, making it easier to assemble the entire battery.
  • the terminal pole 6 is usually made to be much higher than the height of the upper plastic part 7, which greatly reduces the Improves the flatness and appearance of the battery.
  • the terminal pole 6 passes through the first through hole of the top cover of the housing 2 and the upper plastic part 7 and then is bent outward and flanged to press against the upper plastic part 7, and the terminal pole
  • the upper top surface of the pillar 6 is flush with the upper top surface of the upper plastic part 7, which not only makes the top of the battery smoother and more beautiful, but also increases the insulation medium in the vertical direction of the terminal pole 6 and the housing 2, improving the safety of the battery. sex.
  • a receiving groove 71 is provided on the upper surface of the upper plastic part 7
  • a second through hole 711 is provided on the bottom wall of the receiving groove 71 , through which the terminal pole 6 can pass. Bend the flange outward through the second through hole 711 and press it against the bottom wall of the accommodating groove 71 so that the upper top surface of the terminal pole 6 is flush with the upper top surface of the upper plastic part 7 .
  • the terminal pole 6 includes a pole part 61, a pole plate part 63 and a sealing flange 62, wherein the pole plate part 63 and the pole part 61 is connected, and the pole plate part 63 is located below the second sealing ring 9 and the lower plastic part 8, the sealing flange 62 is connected to the pole plate part 63 and is arranged opposite to the pole plate part 63, and the sealing flange 62 surrounds On the outer periphery of the pole portion 61 , the sealing flange 62 is bent outward relative to the pole portion 61 and the pole plate portion 63 and presses against the bottom wall of the accommodating groove 71 .
  • the pole portion 61 , the pole plate portion 63 and the sealing flange 62 are integrally formed, which simplifies the manufacturing process of the terminal pole 6 and thereby reduces the manufacturing cost of the terminal pole 6 .
  • a connecting groove 611 is opened on the side of the pole portion 61 facing the positive bus plate 10 .
  • a plurality of flange notches 621 are spaced on the outer peripheral wall of the sealing flange 62 .
  • the flange notch 621 reduces the tensile deformation force of the outer peripheral wall of the sealing flange 62 during the bending process, preventing the outer peripheral wall of the sealing flange 62 from cracking due to excessive tensile force during the bending process, ensuring the sealing flange. 62 reliability in the bending process.
  • an annular escape groove 64 is opened between the sealing flange 62 and the pole part 61 so that the sealing flange 62 and the pole part 61 are spaced apart, which is more conducive to sealing the flange 62 Perform an outward bending and flanging operation relative to the pole portion 61 and the pole plate portion 63 .
  • an annular reinforcing rib 622 is provided at the portion where the sealing flange 62 bends outward relative to the pole portion 61 and the pole plate portion 63 , thereby improving the structure of the bending portion of the sealing flange 62 The strength prevents the sealing flange 62 from breaking during the bending process, thereby improving the structural strength of the entire terminal pole 6 .
  • the negative electrode bus plate 1 and the case 2 are electrically connected through welding, the negative electrode bus plate 1 and the case 2 are generally made of steel, and the electrical connection between the case 2 and the negative electrode bus plate 1 needs to be welded. Connection, but the surface of the steel will form a weld mark after welding. The weld mark is different from the steel base material, and its own chemical potential is different. In the presence of electrolyte or in a humid environment, galvanic corrosion is prone to occur. During battery storage and transportation, if there is a humid environment, forming a prerequisite for galvanic corrosion, the solder marks will inevitably corrode. Once the solder marks corrode, it will cause potential risks to the overall safety and service life of the battery.
  • the negative electrode manifold 1 is welded and connected to the case 2 inside the case 2, so that the negative electrode manifold 1 and the case 2 can be connected.
  • the soldering mark is isolated from the environment outside the battery, thereby preventing the soldering mark from corroding in a humid environment and ensuring the safety and service life of the battery.
  • the battery also includes a sealing member 3.
  • the sealing end of the housing 2 is sequentially concave with connected first rolling grooves 21 and second rolling grooves 22, wherein the first rolling groove 21 faces The inside of the casing 2 is bent, the second rolling groove 22 is bent toward the outside of the casing 2, the first rolling groove 21 is welded to the negative electrode manifold 1, and the sealing member 3 is accommodated in the second rolling groove 22 to seal. Block the opening of the casing 2 and seal the welding seal between the first rolling groove 21 and the negative electrode busbar 1 inside the casing 2 to ensure that the welding mark between the negative electrode busbar 1 and the casing 2 is isolated from the environment outside the battery. .
  • the sealing member 3 is an explosion-proof disc.
  • the explosion-proof disc is provided to seal the opening of the housing 2. When the pressure inside the housing 2 is too high, it can break through the explosion-proof disc, thus causing damage to the inside of the housing 2.
  • the function of pressure relief is to avoid the risk of battery explosion.
  • the battery further includes a first sealing ring 4.
  • the first sealing ring 4 is wrapped on the outer periphery of the sealing member 3, and the first sealing ring 4 is sandwiched between the sealing member 3 and the second roller. Between the grooves 22, the sealing effect of the sealed end of the housing 2 is improved.
  • the first rolling groove 21 includes a first rolling groove edge 211 and a first bending groove wall 213 connected in sequence. and a second rolling groove side 212, which is opposite to the first rolling groove side 211;
  • the second rolling groove 22 includes a third rolling groove side 221, a second bending groove wall 223 and a fourth rolling groove side 221 connected in sequence.
  • the rolling groove side 222, the third rolling groove side 221 are connected with the second rolling groove side 212, the third rolling groove side 221 is arranged opposite to the first rolling groove side 211, the fourth rolling groove side 222 and the third rolling groove side 221 Arranged oppositely, the sealing member 3 is accommodated between the third rolling groove side 221 and the fourth rolling groove side 222 , so that the sealing member 3 can cover the lower side of the third rolling groove side 221 to realize the sealing of the first rolling groove 21 of blocking.
  • a welding step 2121 is provided on the second rolling groove edge 212 , and the negative electrode bus plate 1 is overlapped and welded to the welding step 2121 .
  • the welding step 2121 can also be used as a pressing area for the negative electrode bus plate 1 during welding to facilitate the welding operation.
  • the depth H of the welding step 2121 is greater than or equal to the height of the solder mark formed after welding of the negative electrode bus plate 1 , so that the depth H of the welding step 2121 can accommodate the negative electrode bus plate 1 and the solder mark formed after welding.
  • the height of the solder print makes the solder joint of the negative electrode bus plate 1 flatter.
  • the first sealing ring 4 has a protective tongue 41 extending toward the center of the housing 2 .
  • the protective tongue 41 is located between the sealing member 3 and the welding step 2121 , and the protective tongue 41 is in contact with the negative electrode bus plate. 1.
  • the spacing of the welding marks formed after welding is set so that the protective tongue 41 can be protected on one side of the welding mark.
  • soldering mark formed by the welding of the negative bus plate 1 and the soldering step 2121 is designed not to penetrate the welding position of the soldering step 2121, thereby avoiding soldering penetration and improving the process yield.
  • the negative bus plate 1 includes a tab connector 11 and a housing connector 12, wherein the tab connector 11 is electrically connected to the battery core 5, the housing connector 12 is connected to the tab connector 11, and the housing connector 12 is overlapped and welded to the welding step 2121.
  • the housing connector 12 is provided with buffer corrugations 121 .
  • This arrangement not only ensures the stability of the housing connector 12 , but also enables the housing connector 12 to have a certain buffering elasticity.
  • the buffer corrugations 121 can effectively absorb the pressure during sealing during the battery sealing process, thereby reducing the pressure of the case 2 on the negative electrode manifold 1, thereby reducing the pressure on the negative electrode manifold 1
  • the pressure on battery cell 5 improves the safety of the battery.
  • the case connector 12 has a certain buffering elasticity, it can reduce the pressure of the case.
  • the pressure of the body 2 on the negative electrode collector plate 1, but the casing 2 will still cause a certain sense of pressure on the negative electrode collector plate 1, causing the negative electrode collector plate 1 to squeeze the battery core 5.
  • the battery core 5 is relatively fragile, and the negative electrode collector The disk 1 can easily cause crushing damage to the battery core 5, thus reducing the process yield.
  • a plurality of battery core escape grooves 111 are spaced on the outer peripheral wall of the tab connector 11 , and a tab protruding end 112 is sandwiched between two adjacent battery core escape grooves 111 . , and an isolation space is formed between the tab extension end 112 and the battery core 5 , and a housing connector 12 is provided directly opposite the side of each battery core escape groove 111 away from the battery core 5 .
  • the above arrangement reduces the contact area between the outer periphery of the tab connector 11 and the battery core 5. When the battery is packaged, it avoids the crushing damage of the battery core 5 caused by the pressing of the first rolling groove 21. Improved process yield.
  • chamfers 1121 are provided on the corners of the tab extension end 112 and deburring is performed, which not only improves the aesthetics of the entire tab connector 11 but also avoids the need for tab connections.
  • the sharp point of Part 11 may scratch the operator.
  • annular groove 51 is provided on the outer peripheral wall of the battery core 5 to form an isolation space between the tab extension end 112 and the battery core 5 , thereby avoiding the need for tab connectors. 11Crushing damages battery core 5.
  • the housing connector 12 and the tab extension end 112 are located along the tab connector. 11 are arranged in a staggered circumferential direction.
  • the number of cell escape grooves 111 and case connectors 12 can be set according to requirements.
  • the outer peripheral wall of the tab connector 11 is punched and bent in a direction away from the battery core 5 to form the housing connector 12 , so that the battery core escape groove 111 is formed in the housing connector 12 toward the battery core 5 .
  • This arrangement facilitates the processing of the negative electrode bus plate 1 , allows the negative electrode busbar 1 to be integrally formed, and also improves the structural strength of the negative electrode busbar 1 .
  • a reinforcing protrusion 113 is formed on the side of the tab connector 11 facing the sealing member 3 .
  • the height of the reinforcing protrusion 113 toward the sealing member 3 is lower than that of the housing connector 12 toward the sealing member 3 .
  • the reinforcing protrusions 113 are arc-shaped, and there are multiple reinforcing protrusions 113 , and the plurality of reinforcing protrusions 113 are arranged at circumferential intervals around the tab connector 11 .
  • three reinforcing protrusions 113 are provided. In other embodiments, they may be provided according to requirements, and may be two, four or even more.
  • an escape hole 114 is opened at the center of the tab connector 11 , and a plurality of reinforcing protrusions 113 are arranged at circumferential intervals around the escape hole 114 , and the escape hole 114 is in contact with the battery core 5
  • the perforations in the middle are arranged facing each other, so that the welding tool can sequentially pass through the escape hole 114 and the perforation in the middle of the battery core 5 to perform welding connection between the terminal pole 6 on the top of the battery and the positive bus plate 10 .
  • This embodiment also provides a battery module.
  • corrosion of the solder mark in a humid environment is avoided, ensuring the safety and service life of the battery module.
  • This embodiment also provides a battery pack.
  • the battery provided in this embodiment is basically the same as the previous embodiment.
  • the difference between the battery provided in this embodiment and the previous embodiment is that the welding positions of the negative electrode bus plate 1 and the first rolling groove 21 are different.
  • the first bent groove wall 213 is welded and connected to the housing connector 12 of the negative electrode bus plate 1 .
  • the welding mark formed by the welding of the housing connector 12 and the first bending groove wall 213 is designed not to penetrate the welding position of the first bending groove wall 213, which increases the thickness of the housing 2 during welding and improves the welding efficiency. Stability and reliability.
  • the material of the housing 2 in the embodiment of the present application can be a low carbon steel material with a nickel plated surface (nickel plating thickness 0.5 ⁇ m-5 ⁇ m), or stainless steel (such as 304 stainless steel).
  • the negative electrode bus plate 1 in the embodiment of the present application may be made of copper, copper with a nickel-plated surface, or steel.
  • the nickel plating layer on the negative electrode bus plate 1 and the nickel plating layer on the nickel plating shell 2 are made of the same material, which facilitates welding and can also reduce the internal resistance of the material.
  • the low carbon steel base material has a high resistivity. By plating a layer of nickel on both the front and back surfaces of the low carbon steel base material, it is easy to weld with the (nickel plated) negative electrode bus plate 1 and the resistance can be reduced at the same time.
  • the resistivity of stainless steel will be high, but after welding with the (nickel-plated) negative bus plate 1, it can effectively prevent the (nickel-plated) negative bus plate 1 from rusting.
  • the copper base material has low resistivity, and a layer of nickel is plated on both the front and back surfaces of the copper base material to facilitate welding with the (nickel-plated) shell 2 . At the same time, nickel also helps the solder joints resist corrosion.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请提供了一种电池、电池模组及电池包。本申请提供的电池包括壳体以及负极汇流盘，其中，负极汇流盘设置在壳体的内部，并且在壳体封口前，负极汇流盘在壳体的内部与壳体焊接连接。

Description

电池、电池模组及电池包
本申请要求在2022年6月2日提交中国专利局、申请号为202210626354.1的中国专利申请，以及在2022年6月2日提交中国专利局、申请号为202221374021.6的中国专利申请的优先权，以上申请的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，例如涉及一种电池、电池模组及电池包。
背景技术
对于电池用户而言，大圆柱电池能够节约零件数量，还能够提升电池生产效率与装配效率。圆柱电池的负极汇流盘与壳体一般都是由钢材制备而成，在电池生产过程中，需要通过焊接的方式实现壳体与负极汇流盘之间的电连接，但钢材焊接后表面会形成焊印，焊印与钢材基材存在材质的差异，其自身的化学电势不同，在电解液存在的情况下或者在潮湿的环境中，容易发生电偶腐蚀。电池在存储和运输过程中，若存在潮湿环境，形成了电偶腐蚀的先决条件，焊印必定会发生腐蚀，焊印一旦发生腐蚀，将会对电池的整体安全和使用寿命造成潜在的风险。
因此，亟需申请一种电池、电池模组及电池包，以解决上述问题。
发明内容
本申请提供了一种电池，以将负极汇流盘与壳体的焊印与外界环境隔绝，提高电池的安全性和使用寿命。
本申请提供了一种电池模组，以避免焊印受到腐蚀，提升电池模组的安全性和使用寿命。
本申请停了一种电池包，以避免焊印受到腐蚀，提升电池包的安全性和使用寿命。
第一方面，本申请提供了一种电池，包括：
壳体；以及
负极汇流盘，设置在所述壳体的内部，并且在所述壳体封口前，所述负极汇流盘在所述壳体的内部与所述壳体焊接连接。
第二方面，本申请提供了一种电池模组，包括如上所述的电池。
第三方面，本申请提供了一种电池包，包括至少一组如上所述的电池模组。
本申请的有益效果：
本申请提供的电池，通过在壳体封口前，将负极汇流盘在壳体的内部与壳体焊接连接，能够将负极汇流盘与壳体的焊印与电池外部的环境进行隔绝，从而避免焊印在潮湿环境中发生腐蚀，保证了电池的安全性和使用寿命。
本申请提供的电池模组，通过应用上述电池，避免了焊印在潮湿环境中发生腐蚀，保证了电池模组的安全性和使用寿命。
本申请提供的电池包，通过应用上述电池模组，避免了焊印在潮湿环境中发生腐蚀，保证了电池包的安全性和使用寿命。
附图说明
图1是本申请一实施例提供的电池的爆炸图；
图2是本申请一实施例提供的电池的剖视图一；
图3是本申请一实施例提供的电池的剖视图二；
图4是图3中C处的局部放大图；
图5是图2中A处的局部放大图；
图6是本申请一实施例提供的负极汇流盘的结构示意图一；
图7是本申请一实施例提供的负极汇流盘的结构示意图二；
图8是本申请另一实施例提供的电池的剖视图；
图9是图8中B处的局部放大图。
图中：
1、负极汇流盘；11、极耳连接件；111、电芯避让槽；112、极耳伸出端；1121、倒角；113、加强凸起；114、避让孔；12、壳体连接件；121、缓冲波纹；
2、壳体；21、第一滚槽；211、第一滚槽边；212、第二滚槽边；2121、焊接台阶；213、第一折弯槽壁；22、第二滚槽；221、第三滚槽边；222、第四滚槽边；223、第二折弯槽壁；
3、封口件；
4、第一密封圈；41、防护舌；
5、电芯；51、环形凹槽；
6、端子极柱；61、极柱部；611、连接槽；62、密封翻边；621、翻边缺口；622、环形加强筋；63、极板部；64、环形避让槽；
7、上塑胶件；71、容置槽；711、第二穿设孔；
8、下塑胶件；9、第二密封圈；10、正极汇流盘；101、插接凸起。
具体实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”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；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，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“左”、“右”等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
如图1和图2所示，本实施例提供了一种电池，主要指的是大圆柱电池，该电池主要包括电芯5、负极汇流盘1、正极汇流盘10、端子极柱6以及壳体2，其中，电芯5、负极汇流盘1以及正极汇流盘10均设置在壳体2的内部，正极汇流盘10设置在电芯5的上端面上并与电芯5的正极耳电连接，负极汇流盘1贴合在电芯5的下端面上并与电芯5的负极耳电连接，负极汇流盘1还与壳体2焊接实现电连接，端子极柱6设置在正极汇流盘10上并与正极汇流盘10电连接，壳体2上端面的顶盖上开设有第一穿设孔，端子极柱6能穿过第一穿设孔伸出壳体2的顶盖。
为了保证端子极柱6与正极汇流盘10之间连接的更加稳固，如图2所示，端子极柱6朝向正极汇流盘10的一侧上开设有连接槽611，正极汇流盘10朝向端子极柱6的一侧上设置有插接凸起101，插接凸起101插入连接槽611中，从而实现端子极柱6和正极汇流盘10之间的电连接，并且提高了端子极柱6和正极汇流盘10之间连接的稳定性和可靠性。
为了保证端子极柱6与壳体2之间的绝缘特性，如图1～图3所示，电池还包括上塑胶件7、下塑胶件8以及第二密封圈9，其中，上塑胶件7放置在壳体2上端面的顶盖上，端子极柱6穿过壳体2顶盖的第一穿设孔和上塑胶件7后向外折弯翻边抵压在上塑胶件7上，从而使得端子极柱6牢固地将上塑胶件7和壳体2的顶盖包裹住，实现密封效果，下塑胶件8和第二密封圈9均套设在端 子极柱6的外周上，下塑胶件8位于正极汇流盘10和壳体2顶盖的内壁之间，并且第二密封圈9夹设在端子极柱6、壳体2顶盖第一穿设孔的内周壁、下塑胶件8以及壳体2顶盖的内壁之间，上塑胶件7、第二密封圈9以及下塑胶件8三者相互配合完全将端子极柱6和壳体2分隔开，确保了端子极柱6与壳体2之间的绝缘特性。此外，通过设置第二密封圈9，提高了端子极柱6与壳体2之间的密封效果。
在本实施例中，第二密封圈9和下塑胶件8可以为一体成型件，不仅便于进行加工，也简化了零件的数量，更加便于组装整个电池。
需要说明的是，电池在生产制造过程中，端子极柱6与壳体2顶盖之间垂直方向的间距越大，两者之间的绝缘介质也就越大，能够提升电池的安全性能，因此，在相关技术中的电池中，为了增加端子极柱6与壳体2顶盖之间垂直方向上的绝缘介质，通常使得端子极柱6远远高出上塑胶件7的高度，大大降低了电池的平整度和美观度。
如图3和图4所示，端子极柱6穿过壳体2顶盖的第一穿设孔和上塑胶件7后向外折弯翻边抵压在上塑胶件7上，并且端子极柱6的上顶面与上塑胶件7的上顶面相齐平，不仅使得电池的顶部更加平整美观，还增加了端子极柱6和壳体2垂直方向上的绝缘介质，提升了电池的安全性。
示例性的，如图4所示，上塑胶件7的上顶面上开设有容置槽71，并且容置槽71的底壁上开设有第二穿设孔711，端子极柱6能穿过第二穿设孔711向外折弯翻边并抵压在容置槽71的底壁上，以使端子极柱6的上顶面与上塑胶件7的上顶面相齐平。
现结合图4对端子极柱6的具体结构进行说明，如图4所示，端子极柱6包括极柱部61、极板部63以及密封翻边62，其中，极板部63与极柱部61相连接，并且极板部63位于第二密封圈9和下塑胶件8的下方，密封翻边62与极板部63相连接并与极板部63相对设置，密封翻边62围设在极柱部61的外周上，并且密封翻边62相对极柱部61和极板部63向外折弯并抵压在容置槽71的底壁上。需要说明的是，在本实施例中，极柱部61、极板部63以及密封翻边62一体成型，简化了端子极柱6的制造工艺，进而降低了端子极柱6的制造成本。此外，需要说明的是，极柱部61朝向正极汇流盘10的一侧上开设有连接槽611。
示例性的，如图4所示，密封翻边62外周壁上间隔开设有多个翻边缺口621，当密封翻边62相对极柱部61和极板部63向外折弯翻边时，翻边缺口621降低了密封翻边62外周壁在折弯过程中的拉伸变形力，避免密封翻边62的外周壁在折弯过程中因拉伸力过大产生裂痕，保证了密封翻边62在折弯过程中的可靠性。
示例性的，如图4所示，密封翻边62和极柱部61之间开设有环形避让槽64，以使密封翻边62与极柱部61间隔设置，更加有利于将密封翻边62相对极 柱部61和极板部63进行向外折弯翻边操作。
在本实施例中，如图4所示，密封翻边62相对极柱部61和极板部63向外折弯的部位设置有环形加强筋622，提高了密封翻边62折弯部位的结构强度，避免密封翻边62在折弯的过程中，折弯部发生断裂，提升了整个端子极柱6的结构强度。
由于负极汇流盘1与壳体2通过焊接实现电连接，负极汇流盘1与壳体2一般都是由钢材制备而成，需要通过焊接的方式实现壳体2与负极汇流盘1之间的电连接，但钢材焊接后表面会形成焊印，焊印与钢材基材存在材质的差异，其自身的化学电势不同，在电解液存在的情况下或者在潮湿的环境中，容易发生电偶腐蚀。在电池存储和运输过程中，若存在潮湿环境，形成了电偶腐蚀的先决条件，焊印必定会发生腐蚀，焊印一旦发生腐蚀，将会对电池的整体安全和使用寿命造成潜在的风险。
如图5所示，本实施例提供的电池在壳体2的下端面封口前，负极汇流盘1在壳体2的内部与壳体2焊接连接，能够将负极汇流盘1与壳体2的焊印与电池外部的环境进行隔绝，从而避免焊印在潮湿环境中发生腐蚀，保证了电池的安全性和使用寿命。
示例性的，如图5所示，电池还包括封口件3，壳体2的封口端依次凹设有相连接的第一滚槽21以及第二滚槽22，其中，第一滚槽21朝向壳体2的内部弯折，第二滚槽22朝向壳体2的外部弯折，第一滚槽21与负极汇流盘1焊接连接，封口件3容置在第二滚槽22中，以封堵壳体2的开口并将第一滚槽21与负极汇流盘1的焊印封堵在壳体2的内部，保证将负极汇流盘1与壳体2的焊印与电池外部的环境隔绝开。通过将壳体2的封口端进行滚槽设置，并且将封口件3容置在第二滚槽22中，不仅能够实现对封口件3的稳固固定，也大大提高了壳体2封口端的密封效果。
在本实施例中，封口件3为防爆片，通过设置防爆片来封堵壳体2的开口，当壳体2内部的压强过大时，能够冲破防爆片，从而对壳体2内部起到泄压的作用，避免电池出现爆炸的危险。
示例性的，如图5所示，电池还包括第一密封圈4，第一密封圈4包覆在封口件3的外周上，并且第一密封圈4夹设在封口件3和第二滚槽22之间，提高了壳体2封口端的密封效果。
结合图5对第一滚槽21和第二滚槽22的具体结构进行说明，如图5所示，第一滚槽21包括依次连接的第一滚槽边211、第一折弯槽壁213以及第二滚槽边212，第二滚槽边212与第一滚槽边211相对设置；第二滚槽22包括依次连接的第三滚槽边221、第二折弯槽壁223以及第四滚槽边222，第三滚槽边221与第二滚槽边212相连接，第三滚槽边221与第一滚槽边211相对设置，第四滚槽边222与第三滚槽边221相对设置，封口件3容置在第三滚槽边221和第四滚槽边222之间，从而使得封口件3能够覆盖在第三滚槽边221的下侧，实 现对第一滚槽21的封堵。
在本实施例中，如图5所示，第二滚槽边212上设置有焊接台阶2121，负极汇流盘1搭接焊接连接在焊接台阶2121上。通过在第二滚槽边212上设置焊接台阶2121，使得负极汇流盘1在与壳体2焊接的时候就可以清晰的看到待焊接的焊缝或焊接搭接处，避免了焊接偏焊的情况，也避免了发生虚焊和焊穿的情况，提升了过程良率，保证了电池快充性能的一致性。此外，该焊接台阶2121也可作为焊接时对负极汇流盘1的按压区域，便于进行焊接操作。
示例性的，如图5所示，焊接台阶2121的深度H大于或等于负极汇流盘1焊接后形成的焊印的高度，使得焊接台阶2121的深度H可以容纳负极汇流盘1和焊接后形成的焊印高度，使得负极汇流盘1的焊接处更加平整。
示例性的，如图5所示，第一密封圈4朝向壳体2的中心方向延伸有防护舌41，防护舌41位于封口件3和焊接台阶2121之间，并且防护舌41与负极汇流盘1焊接后形成的焊印间隔设置，使得防护舌41能够防护在焊印的一侧，当对电池进行封口的过程中，可以降低第一密封圈4对焊接处的应力施加，保护焊接处不开裂，保证焊接的稳定性和可靠性。
需要说明的是，负极汇流盘1与焊接台阶2121焊接形成的焊印设计为不穿透焊接台阶2121的焊接位置，避免出现焊穿的情况，提升了过程良率。
现结合图6和图7对负极汇流盘1的具体结构进行说明，如图6和图7所示，负极汇流盘1包括极耳连接件11以及壳体连接件12，其中，极耳连接件11与电芯5电连接，壳体连接件12与极耳连接件11相连接，并且壳体连接件12搭接焊接连接在焊接台阶2121上。
示例性的，如图7所示，壳体连接件12上设置有缓冲波纹121，该设置方式不仅保证了壳体连接件12的稳定性，也使得壳体连接件12具有一定的缓冲弹性。壳体连接件12与焊接台阶2121焊接后，进行电池密封过程中缓冲波纹121能够有效吸收密封时的压迫力，从而减少了壳体2对负极汇流盘1的压力，进而减轻了负极汇流盘1对电芯5的压力，提升了电池的安全性。
此外，需要说明的是，电池在生产制造过程中，尤其是电池进行封装时，电池封口处的第一滚槽21存在下压情况，虽然壳体连接件12具有一定的缓冲弹性，能够减少壳体2对负极汇流盘1的压力，但是壳体2仍会对负极汇流盘1造成一定的压迫感，进而使得负极汇流盘1挤压电芯5，再加上电芯5比较脆弱，负极汇流盘1容易对电芯5造成挤压损伤，从而降低了过程良率。
如图6和图7所示，极耳连接件11的外周壁上间隔开设有多个电芯避让槽111，相邻两个电芯避让槽111之间夹设形成有极耳伸出端112，并且极耳伸出端112与电芯5之间形成有隔离空间，并且每个电芯避让槽111远离电芯5的一侧均正对设置有壳体连接件12。上述设置方式减少了极耳连接件11外周与电芯5的贴合面积，当对电池进行封装时，避免了第一滚槽21下压导致的极耳连接件11挤压损伤电芯5，提升了过程良率。
示例性的，如图6所示，极耳伸出端112的边角上开设有倒角1121，进行去毛刺处理，不仅提高了整个极耳连接件11的美观度，还避免了极耳连接件11的尖锐处划伤操作人员。
在本实施例中，如图5所示，电芯5的外周壁上开设有环形凹槽51，以使极耳伸出端112与电芯5之间形成隔离空间，从而避免极耳连接件11挤压损伤电芯5。
需要说明的是，在本实施例中，电芯避让槽111开设有三个，相应地，壳体连接件12对应设置有三个，壳体连接件12和极耳伸出端112沿极耳连接件11的周向交错排布。在其他实施例中，电芯避让槽111和壳体连接件12的数量可以根据需求进行设置。
示例性的，极耳连接件11的外周壁朝远离电芯5的方向冲压弯折以形成壳体连接件12，以使壳体连接件12朝向电芯5的方向上形成电芯避让槽111。该设置方式便于对负极汇流盘1进行加工，使得负极汇流盘1一体成型，也提高了负极汇流盘1的结构强度。
示例性的，如图6所示，极耳连接件11朝向封口件3的一侧形成有加强凸起113，加强凸起113朝靠近封口件3方向的高度低于壳体连接件12朝靠近封口件3方向的高度。通过设置加强凸起113，不仅提高了负极汇流盘1的结构强度，并且设计的加强凸起113可以作为负极汇流盘1进行激光焊接时焊接的边界使用。此外，加强凸起113朝靠近封口件3方向的高度低于壳体连接件12朝靠近封口件3方向的高度，该设置方式使得在安装封口件3对壳体2进行封口时，加强凸起113不会与封口件3相抵接，避免对封口件3造成抵压损伤，进而保证了封口件3爆破精度。
示例性的，加强凸起113呈弧状，并且加强凸起113设置有多个，多个加强凸起113围绕极耳连接件11的周向间隔排布。在本实施例中，加强凸起113设置有三个，在其他实施例中，可以根据需求进行设置，可以为两个、四个甚至更多个。
示例性的，如图6所示，极耳连接件11的圆心处开设有避让孔114，多个加强凸起113围绕避让孔114的周向间隔排布，并且该避让孔114与电芯5中间的穿孔正对设置，便于焊接工具依次穿过避让孔114和电芯5中间的穿孔对电池顶部的端子极柱6和正极汇流盘10之间进行焊接连接。
本实施例还提供了一种电池模组，通过应用上述电池，避免了焊印在潮湿环境中发生腐蚀，保证了电池模组的安全性和使用寿命。
本实施例还提供了一种电池包，通过应用上述电池模组，避免了焊印在潮湿环境中发生腐蚀，保证了电池包的安全性和使用寿命。
本实施例提供的电池与前述实施例基本相同，本实施例提供的电池与前述实施例的不同之处在于：负极汇流盘1与第一滚槽21的焊接位置不同。
如图8和图9所示，在本实施例中，第一折弯槽壁213与负极汇流盘1的壳体连接件12焊接连接。并且壳体连接件12与第一折弯槽壁213焊接形成的焊印设计为不穿透第一折弯槽壁213的焊接位置，增大了焊接时壳体2的厚度，提升了焊接的稳定性和可靠性。
示例性的，本申请实施例中壳体2的材质可以为表面镀镍的低碳钢材料(镀镍厚度0.5μm-5μm)，也可以是不锈钢(如304不锈钢)。
示例性的，本申请实施例中的负极汇流盘1材质可以是铜、也可以是表面镀镍的铜、也可以是钢。
负极汇流盘1上的镀镍层与镀镍壳体2上的镀镍层为同材质便于焊接，也可以降低材料的内阻。低碳钢基材具有较高的电阻率，通过在低碳钢基材的正反表面均镀上一层镍层，便于与(镀镍)负极汇流盘1焊接，同时可以降低电阻。不锈钢电阻率会偏高，但与(镀镍)负极汇流盘1焊接后，可以有效防止(镀镍)负极汇流盘1锈蚀。铜基材具有较低的电阻率，通过在铜基材的正反表面均镀上一层镍层，便于与(镀镍)壳体2焊接。同时，镍也有助于焊点位置耐腐蚀。

Claims (20)

  1. 一种电池，包括：
    壳体(2)；以及
    负极汇流盘(1)，设置在所述壳体(2)的内部，并且在所述壳体(2)封口前，所述负极汇流盘(1)在所述壳体(2)的内部与所述壳体(2)焊接连接。
  2. 根据权利要求1所述的电池，还包括封口件(3)，所述壳体(2)的封口端依次凹设有相连接的第一滚槽(21)以及第二滚槽(22)，所述第一滚槽(21)朝向所述壳体(2)的内部弯折，所述第二滚槽(22)朝向所述壳体(2)的外部弯折，所述第一滚槽(21)与所述负极汇流盘(1)焊接连接，所述封口件(3)容置在所述第二滚槽(22)中，以封堵所述壳体(2)的开口并将所述第一滚槽(21)与所述负极汇流盘(1)的焊印封堵在所述壳体(2)的内部。
  3. 根据权利要求2所述的电池，其中，所述第一滚槽(21)包括依次连接的第一滚槽边(211)、第一折弯槽壁(213)以及第二滚槽边(212)，所述第二滚槽边(212)与所述第一滚槽边(211)相对设置；
    所述第二滚槽(22)包括依次连接的第三滚槽边(221)、第二折弯槽壁(223)以及第四滚槽边(222)，所述第三滚槽边(221)与所述第二滚槽边(212)相连接，所述第三滚槽边(221)与所述第一滚槽边(211)相对设置，所述第四滚槽边(222)与所述第三滚槽边(221)相对设置，所述封口件(3)容置在所述第三滚槽边(221)和所述第四滚槽边(222)之间。
  4. 根据权利要求3所述的电池，其中，所述第一折弯槽壁(213)与所述负极汇流盘(1)焊接连接。
  5. 根据权利要求3所述的电池，其中，所述第二滚槽边(212)上设置有焊接台阶(2121)，所述负极汇流盘(1)搭接焊接连接在所述焊接台阶(2121)上。
  6. 根据权利要求5所述的电池，其中，所述焊接台阶(2121)的深度大于或等于所述负极汇流盘(1)焊接后形成的焊印的高度。
  7. 根据权利要求5所述的电池，还包括：
    第一密封圈(4)，包覆在所述封口件(3)的外周上，并且夹设在所述封口件(3)和所述第二滚槽(22)之间。
  8. 根据权利要求7所述的电池，其中，所述第一密封圈(4)朝向所述壳体(2)的中心方向延伸有防护舌(41)，所述防护舌(41)位于所述封口件(3)和所述焊接台阶(2121)之间，并且所述防护舌(41)与所述负极汇流盘(1)焊接后形成的焊印间隔设置。
  9. 根据权利要求3～8任一项所述的电池，其中，所述负极汇流盘(1)与所述第一滚槽(21)焊接形成的焊印设计为不穿透所述第一滚槽(21)的焊接位置。
  10. 根据权利要求2～8任一项所述的电池，其中，所述封口件(3)为防爆片。
  11. 根据权利要求2～8任一项所述的电池，其中，所述负极汇流盘(1)包括：
    极耳连接件(11)；以及
    壳体连接件(12)，与所述极耳连接件(11)相连接，并且与所述第一滚槽(21)焊接连接。
  12. 根据权利要求11所述的电池，其中，所述壳体连接件(12)上设置有缓冲波纹(121)。
  13. 根据权利要求11所述的电池，还包括电芯(5)，所述电芯(5)设置在所述壳体(2)内部并且位于所述负极汇流盘(1)的上方，所述极耳连接件(11)与所述电芯(5)电连接，所述极耳连接件(11)的外周壁上间隔开设有多个电芯避让槽(111)，相邻两个所述电芯避让槽(111)之间夹设形成有极耳伸出端(112)，并且所述极耳伸出端(112)与所述电芯(5)之间形成有隔离空间，并且每个所述电芯避让槽(111)远离所述电芯(5)的一侧正对设置有所述壳体连接件(12)。
  14. 根据权利要求13所述的电池，其中，所述极耳连接件(11)的外周壁朝远离所述电芯(5)的方向冲压弯折以形成所述壳体连接件(12)，以使所述壳体连接件(12)朝向所述电芯(5)的方向上形成所述电芯避让槽(111)。
  15. 根据权利要求13所述的电池，其中，所述极耳连接件(11)朝向所述封口件(3)的一侧形成有加强凸起(113)，所述加强凸起(113)朝靠近所述封口件(3)方向的高度低于所述壳体连接件(12)朝靠近所述封口件(3)方向的高度。
  16. 根据权利要求1所述的电池，其中，所述壳体(2)的材质为镀镍低碳钢，或不锈钢。
  17. 根据权利要求16所述的电池，其中，所述镀镍低碳钢的镀镍层厚度为0.5μm-3μm。
  18. 根据权利要求1所述的电池，其中，所述负极汇流盘(1)的材质为铜、镀镍铜或钢。
  19. 一种电池模组，包括权利要求1～18任一项所述的电池。
  20. 一种电池包，包括至少一组权利要求19所述的电池模组。
PCT/CN2022/127668 2022-06-02 2022-10-26 电池、电池模组及电池包 Ceased WO2023231282A1 (zh)

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