WO2023036291A1 - 一种复合极柱、顶盖和电池 - Google Patents

一种复合极柱、顶盖和电池 Download PDF

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Publication number
WO2023036291A1
WO2023036291A1 PCT/CN2022/118086 CN2022118086W WO2023036291A1 WO 2023036291 A1 WO2023036291 A1 WO 2023036291A1 CN 2022118086 W CN2022118086 W CN 2022118086W WO 2023036291 A1 WO2023036291 A1 WO 2023036291A1
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WO
WIPO (PCT)
Prior art keywords
pole
top cover
composite
matching
protrusion
Prior art date
Application number
PCT/CN2022/118086
Other languages
English (en)
French (fr)
Inventor
陈圣立
邹武元
姜斌
吴志康
周贤
Original Assignee
江苏正力新能电池技术有限公司
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 江苏正力新能电池技术有限公司 filed Critical 江苏正力新能电池技术有限公司
Priority to DE112022003560.9T priority Critical patent/DE112022003560T5/de
Publication of WO2023036291A1 publication Critical patent/WO2023036291A1/zh

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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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • 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 invention relates to the technical field of batteries, in particular to a composite pole, a top cover and a battery.
  • the pole In the field of lithium-ion power battery technology, the pole is a part that connects the inside and outside of the battery. One end of the pole is connected to the battery inside the battery, and the other end is connected to the circuit of the electrical equipment outside the battery, so that the battery can be used for external use. Electric equipment can be powered, and it can also realize its own charging.
  • the negative electrode pole of the battery is usually made of copper material, and copper material is more expensive, in order to save costs, the part connecting the inside of the pole pole with the battery cell is usually kept as the original copper material, so as to ensure the safety of the battery.
  • the part connecting the exterior of the pole to the electrical equipment is made of relatively low-cost aluminum material, and the copper material and aluminum material are connected by friction welding to form a battery that can not only ensure the performance of the battery, but also reduce the cost. Relatively low composite pole.
  • the composite pole connected by friction welding has high processing costs, and is prone to false welding during the welding process, which affects the quality and safety performance of the power battery.
  • the purpose of the present invention is to provide a simple, reliable and low-cost composite pole, which can effectively guarantee the quality, performance and safety performance of the battery.
  • Another object of the present invention is to provide a top cover and a battery, which include the above-mentioned composite pole. Therefore, it also has the advantages of low cost, good performance and high quality.
  • the present invention provides a composite pole, comprising:
  • An inner pole, the inner pole is provided with a first matching part
  • An outer pole, the outer pole is provided with a second matching portion that cooperates with the first matching portion;
  • One of the first matching portion and the second matching portion is a concave groove, and the other of the first matching portion and the second matching portion is a protrusion.
  • the circumferential edge of the protrusion is attached to the circumferential edge of the inner wall of the recessed groove, and the end surface of the protrusion is attached to the bottom of the recessed groove.
  • the inner pole has a pole boss
  • the first matching part is a concave groove arranged on the top wall of the pole boss, and the concave direction of the concave groove is in line with the convex direction of the pole boss.
  • the depression depth of the depression groove is less than or equal to the protrusion height of the pole boss, and the second matching part is a protrusion.
  • the inner pole includes a first pole body and a pole boss protruding from the first pole body, and the first matching part is arranged on the pole boss;
  • the outer pole includes a second pole In the pole body, the second matching portion is arranged on the second pole body, and when the concave groove and the protrusion are matched, the second pole body is attached to the first pole body.
  • the number of the first matching parts is multiple, and the number of the second matching parts matches the number of the first matching parts, so that the plurality of second matching parts and the plurality of first matching parts one by one Match accordingly.
  • the composite pole further includes a conductive layer, and the conductive layer is disposed between the first matching portion and the second matching portion.
  • the present invention provides a top cover, comprising:
  • the top cover plate is provided with mounting holes
  • the composite pole is plugged into the installation hole and protrudes from the installation hole.
  • the top cover includes a sealing ring, and the sealing ring is sleeved outside the composite pole, and is used to simultaneously seal and connect the inner pole and the inner wall of the installation hole, and the outer pole and the inner wall of the installation hole;
  • the top cover includes a sealing ring and an insulating limiter.
  • the sealing ring is arranged between the inner pole and the inner wall of the installation hole, and is used to seal the connection between the inner pole and the inner wall of the installation hole;
  • the insulating limiter is arranged between the outer pole and the installation hole. Between the inner walls of the hole, it is used to limit the position of the outer pole relative to the top cover.
  • the top cover includes a sealing ring and an insulating limiter;
  • the inner pole includes a first pole body and a pole boss protruding from the first pole body, and the sealing ring is sleeved on the pole protrusion. Outside the platform, it is used to seal fit with the inner wall of the installation hole;
  • the insulation limiter is provided with an inner ring groove and an outer ring groove, and the cover plate also includes an annular protrusion on the edge of the inner wall of the installation hole, and the outer pole and the inner ring groove are inserted connected, the ring protrusion is plugged into the outer ring groove.
  • two installation holes are opened on the top cover plate, and the top cover includes two composite poles, and one composite pole is a negative pole, the other composite pole is a positive pole, and the negative pole
  • the pole and the positive pole are respectively installed in the corresponding mounting holes; and the inner pole of the negative pole is made of copper or aluminum, and the outer pole of the negative pole is made of aluminum; the inner pole of the positive pole and the outer pole
  • the column is made of aluminum.
  • the top cover further includes a busbar, and the busbar is integrally formed with the inner pole of the composite pole and attached to the side wall of the top cover plate.
  • the present invention provides a battery, comprising:
  • the composite pole in any one of the foregoing embodiments; or, the top cover in any one of the foregoing embodiments.
  • An embodiment of the present invention provides a composite pole, which includes an inner pole and an outer pole; the inner pole is provided with a first matching portion; the outer pole is provided with a second matching portion that cooperates with the first matching portion; One of the first matching portion and the second matching portion is a concave groove, and the other of the first matching portion and the second matching portion is a protrusion.
  • the first matching portion is matched with the second matching portion
  • the circumferential edge of the protrusion is attached to the circumferential edge of the inner wall of the recessed groove, and the end surface of the protrusion is attached to the bottom of the recessed groove.
  • the composite pole does not need to be connected by welding, and there is no problem of virtual welding.
  • the circumferential direction of the inner wall of the recessed groove is closely attached to the circumferential direction of the protrusion, and the end surface of the protrusion is also closely attached to the bottom of the recessed groove, which can not only It ensures the rigidity of the composite pole, as well as the conductivity and airtightness of the composite pole, thus effectively ensuring the quality, performance and safety of the composite pole.
  • Embodiments of the present invention also provide a top cover and a battery, which include the above-mentioned composite pole. Therefore, it also has the advantages of low cost, good performance and high quality.
  • Fig. 1 is a schematic structural view of a top cover provided by an embodiment of the present invention
  • Fig. 2 is a schematic partial cross-sectional view of a top cover provided by an embodiment of the present invention
  • Fig. 3 is a partially exploded schematic diagram of a top cover provided by an embodiment of the present invention.
  • Fig. 4 is a partial structural schematic diagram of a top cover provided by an embodiment of the present invention.
  • Fig. 5 is a structural schematic diagram of another top cover provided by an embodiment of the present invention.
  • Fig. 6 is a schematic partial cross-sectional view of another top cover provided by an embodiment of the present invention.
  • Fig. 7 is a partially exploded schematic diagram of another top cover provided by an embodiment of the present invention.
  • Fig. 8 is a partial structural schematic diagram of another top cover provided by an embodiment of the present invention.
  • Icon 100-top cover; 101-top cover plate; 103-installation hole; 104-composite pole; 105-inner pole; 107-outer pole; 109-cover; 111-plastic body; 113-first Pole body; 115-pole boss; 117-second pole body; 119-accommodating groove; 121-first matching part; 123-second matching part; 125-sealing ring; ; 129-inner ring groove; 131-outer ring groove; 133-combustion piece; 135-annular protrusion.
  • horizontal does not imply that a component is absolutely level or overhanging, but may be slightly inclined.
  • horizontal only means that its direction is more horizontal than “vertical”, and it does not mean that the structure must be completely horizontal, but can be slightly inclined.
  • the terms “installation”, “installation”, “connection” and “connection” should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components.
  • installation e.g., it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components.
  • the inner pole and the outer pole of the composite pole of the battery are usually matched by friction welding, and the friction welding connection of the inner pole and the outer pole is prone to false welding during the welding process, making it easy to appear poles. Problems such as column falling off have affected the quality and safety performance of the power battery.
  • this embodiment provides a battery, the inner pole and the outer pole of the composite pole can be connected through the matching part, which can avoid the connection by welding, so that the problem of virtual welding can be avoided, and it has the advantages of matching
  • the method has the advantages of being simple, reliable and low in cost, and can effectively guarantee the quality, service performance and safety performance of the battery.
  • the structure of the battery will be described in detail below.
  • FIG. 1 is a schematic structural diagram of a top cover 100 provided in this embodiment.
  • this embodiment provides a battery, which includes a housing (not shown), a cell (not shown) and a top cover 100 .
  • the casing is a hollow square structure with an opening at one end, the battery cell is arranged inside the casing, and the top cover 100 is arranged at the opening of the casing and is electrically connected to the battery cell.
  • the top cover 100 specifically includes a top cover plate 101 and a composite pole 104 .
  • two installation holes 103 are opened on the top cover plate 101, and the number of composite poles 104 is two, and one is a negative pole pole, the other is a positive pole pole, and the negative pole pole is inserted into the installation hole 103 at the corresponding position.
  • the inner side of the negative pole pole close to the battery core is electrically connected to the negative pole tab of the battery core, and the part of the negative pole pole protruding from the installation hole 103 is used to connect with the negative pole of the external electrical equipment , the positive pole is also inserted into the installation hole 103 at the corresponding position, and protrudes from the installation hole 103.
  • the part out of the battery is used to connect with the positive pole of the external electrical equipment, so that the battery can perform normal charging and discharging operations.
  • Fig. 2 is a schematic partial cross-sectional view of a top cover 100 provided by this embodiment
  • Fig. 3 is a partial exploded schematic diagram of a top cover 100 provided by this embodiment
  • Fig. 4 is a schematic diagram of a top cover 100 provided by this embodiment Schematic diagram of the local structure. Please refer to Fig. 1 to Fig.
  • the battery that composite pole 104 is suitable for is lithium-ion battery specifically, when being suitable for lithium-ion battery, no matter it is positive pole pole or negative pole pole pole, this composite pole
  • the columns 104 each include an inner pole 105 and an outer pole 107, wherein the inner pole 105 of the negative pole is used for electrical connection with the positive pole lug of the battery cell, and its material is selected as copper to ensure the performance of the battery , the outer pole 107 of the negative pole is used to connect with the negative pole of the external electrical equipment, and its material is selected as aluminum, which can save costs.
  • the inner pole 105 of the positive pole and the negative pole are made of aluminum to further save manufacturing costs.
  • the composite pole 104 can also be applied to sodium-ion batteries. When it is suitable for sodium-ion batteries, the materials of the positive pole and the negative pole of the composite pole 104 are both aluminum materials. Examples are not limited.
  • the inner pole 105 is provided with a first matching portion 121 .
  • the outer pole 107 is provided with a second matching portion 123 matching with the first matching portion 121 .
  • one of the first matching portion 121 and the second matching portion 123 is a concave groove, and the other of the first matching portion 121 and the second matching portion 123 is a protrusion.
  • the circumferential edge of the protrusion is attached to the circumferential edge of the inner wall of the recessed groove, and the end surface of the protrusion is attached to the bottom of the recessed groove.
  • the cooperation between the inner pole 105 and the outer pole 107 of the composite pole 104 does not need to be connected by welding, so there is no problem of virtual welding, and the risk of pole falling off can also be reduced, avoiding welding.
  • the occurrence of problems such as blast holes, weld penetration, and air leakage.
  • the composite pole 104 of this embodiment only needs to use stamping to match the concave groove and the protrusion.
  • the stamping has the advantages of simple, reliable and low-cost matching methods; on the other hand, The stamping method is used to make the circumferential direction of the groove inner wall of the concave groove fit closely with the convex circumferential direction, and the convex end surface is also closely matched with the groove bottom of the concave groove, so that not only the rigidity of the composite pole 104 can be guaranteed, but also the The electrical conductivity and airtight performance of the composite pole 104 can effectively guarantee the quality, use performance and safety performance of the composite pole 104 .
  • the inner pole 105 and the outer pole 107 are specifically punched to form a composite matching structure of the first matching portion 121 and the second matching portion 123 .
  • the two are closely matched by stamping, which can control the cost and improve the efficiency, and at the same time, the structure formed by the stamping of the two can play the role of overcurrent and relatively fixed, so as to fully ensure the stability of the composite pole 104 Performance, safety performance and use performance, thus ensuring the safety and reliability of the battery.
  • the first mating portion 121 and the second mating portion 123 can also be obtained by punching first, and then the two are mated by bonding and fitting, so as to ensure that the concave groove and the protrusion are closely matched to ensure the compound The performance of the pole 104 is sufficient, and will not be repeated in this embodiment.
  • FIG. 5 is a schematic structural view of another top cover 100 provided in this embodiment
  • Fig. 6 is a partial cross-sectional schematic diagram of another top cover 100 provided in this embodiment
  • Fig. 7 is another top cover provided in this embodiment 100 is a partially exploded schematic diagram
  • FIG. 8 is a partial structural schematic diagram of another top cover 100 provided in this embodiment.
  • the number of the first matching portion 121 may be multiple or one, and the number of the second matching portion 123 matches the number of the first matching portion 121 .
  • the number of the first matching part 121 and the number of the second matching part 123 is one, and for example, as shown in Figures 5 to 8, the number of the first matching part 121 and the second matching part 123 Both are two, to further ensure the stability and reliability of the composite pole 104, thereby ensuring the safety performance and service performance of the battery.
  • the number of the first matching portion 121 and the second matching portion 123 can also be adjusted according to requirements, for example, it can be set to three, four, etc., which will not be repeated in this embodiment.
  • the inner pole 105 is protrudingly provided with The pole boss 115 is conveniently arranged to be plugged into the installation hole 103, so that the outer pole 107 can be exposed from the installation hole 103 for connection with external electrical equipment.
  • the first matching portion 121 is specifically a concave groove provided on the top wall of the pole boss 115, the concave direction of the concave groove is opposite to the convex direction of the pole boss 115, and the concave depth of the concave groove is less than or equal to
  • the protrusion height of the pole boss 115 is that the second matching portion 123 is a protrusion.
  • the first matching portion 121 is a concave groove
  • the second matching portion 123 is a protrusion.
  • the concave direction of the concave groove is opposite to the convex direction of the pole boss 115, which makes the stamping direction of the pole boss 115 opposite to the stamping direction of the composite structure of the concave groove and the protrusion, which can The airtightness and stability of the composite structure of the concave groove and the protrusion after punching are further ensured, so that the stability and reliability of the composite pole 104 can be further ensured.
  • the recessed depth of the recessed groove is less than or equal to the raised height of the pole boss 115, the stamping process does not need to occupy other space, which can make the overall structure more compact and stable, and can further ensure the composite pole 104 stability and reliability.
  • the pole boss 115 obtained by stamping the inner pole 105 has a receiving groove 119 on the side close to the battery core, and the inner pole 105 and the outer pole 107 are simultaneously stamped to form a recessed groove
  • the composite stamping structure and the protrusion are accommodated in the accommodating groove 119, so as to ensure the safety of the composite stamping structure and further ensure the reliability of the composite structure of the two, thereby fully ensuring the safety and reliability of the battery .
  • the concave groove can also be arranged on the outer pole 107, and the protrusion can also be arranged on the inner pole 105.
  • the stamping direction of the pole boss 115 of the inner pole 105 is the same as The punching directions of the recessed groove and the raised composite structure are the same, which will not be repeated in this embodiment.
  • the inner pole 105 specifically includes a first pole body 113, and the pole boss 115 protrudes from the first pole body 113.
  • the outer pole 107 includes a second pole body 117, and when the concave groove and the protrusion are matched, the second pole body 117 is attached to the first pole body 113.
  • the inner pole 105 and the outer pole 107 are stamped to form a composite stamping structure of recessed grooves and protrusions, it can also ensure that the first pole body 113 and the second pole body 117 are arranged in close contact, so that further Ensuring the airtightness, stability and reliability of the composite pole 104 can further improve the safety and reliability of the battery.
  • the concave groove has a notch and a groove bottom opposite to the notch, and the inner diameter of the concave groove first decreases and then increases along the direction from the notch to the bottom of the groove. That is to say, the shape of the concave groove is set to be larger near the bottom of the groove, so that after stamping to form a composite matching structure between the protrusion and the concave groove, the protrusion is not easy to escape from the concave groove, and the outer pole 107 is more difficult to contact with the inner pole. 105 are separated, so that the structure is more compact, which can further ensure the safety and reliability of the battery.
  • the composite pole 104 can also be provided with a conductive layer (not shown in the figure) according to requirements, and the conductive layer is located between the first matching portion 121 and the second matching portion 123 .
  • the conductive layer is a structure prepared from a softer conductive material, which can be stamped together with the inner pole 105 and the outer pole 107 to obtain a composite structure that cooperates with the first matching portion 121 and the second matching portion 123, so as to The contact area between the first matching portion 121 and the second matching portion 123 is increased to enhance the electrical conductivity between the first matching portion 121 and the second matching portion 123 , thereby further ensuring the safety and reliability of the battery.
  • the side of the top cover plate 101 close to the battery core is also provided with a busbar 133 , and one end of the busbar 133 is connected to the inner pole 105 , the other end of the bus piece 133 is connected to the tab of the battery cell, so as to communicate with the inside and outside of the battery.
  • the bus piece 133 is integrally formed with the first pole body 113 of the inner pole 105 .
  • the connected inner pole 105 and busbar 133 can be directly punched out of copper to simplify the manufacturing process, improve manufacturing efficiency, and ensure the stability and reliability of the manufactured composite pole 104 .
  • the busbar 133 and the inner pole 105 are integrally formed, the original assembly order of the battery can also be changed by such arrangement.
  • the pole and the confluence structure are separately arranged, when the pole is matched with the tab of the cell, it is necessary to first install the confluence structure to the top cover, first weld it to the pole of the top cover, and then Assembling the entire top cover to the battery case so that the confluence structure is then welded to the tabs is a complex installation process, which requires high precision before and after the confluence structure is assembled and welded, and thus is not easy to operate. Therefore, in this embodiment, the bus piece 133 and the inner pole 105 are integrally formed. During the assembly process, the integrally formed structure of the two is directly welded to the tab and then installed on the top cover, which can effectively simplify the process. Save costs and improve assembly and manufacturing efficiency.
  • the top cover 101 specifically includes a cover body 109 and a plastic body 111 disposed on the side of the cover body 109 close to the battery core.
  • the plastic body 111 It can provide the function of insulation protection to further ensure the safety of the battery.
  • the installation hole 103 of the top cover 100 is provided through the top cover plate 101 and the plastic body 111 .
  • the inner pole 105 is attached to the side of the plastic body 111 close to the battery, and the pole boss 115 of the inner pole 105 is plugged into the installation hole 103 .
  • the busbar 133 is also attached to the side of the plastic body 111 close to the battery cell, so as to be electrically connected to the tab of the battery cell, thereby ensuring efficient charging and discharging of the battery.
  • the top cover 100 includes a sealing ring 125 and an insulating stopper 127 .
  • the sealing ring 125 is arranged between the inner pole 105 and the inner wall of the installation hole 103, and is used for sealingly connecting the inner pole 105 and the inner wall of the installation hole 103;
  • the insulating limiter 127 is arranged between the outer pole 107 and the installation hole 103 Between the inner walls of the outer pole 107 is used to limit the position of the outer pole 107 relative to the top cover 100 .
  • the airtightness between the composite pole 104 and the installation hole 103 is better, and the structure of the cooperation between the two is more compact and reliable, thereby helping to ensure the use of the composite pole 104 Performance and safety performance, which can further improve the reliability and stability of the battery.
  • the material of the insulating limiter 127 is specifically selected as pps, which has the advantages of good rigidity and insulation, so it can also cooperate with the seal ring 125 to provide good limit and insulation effects to ensure the compression of the seal ring 125, thereby enabling Limiting and insulating functions are provided for the cooperation between the composite pole 104 and the top cover 100, so as to further improve the stability and safety of the composite pole 104, thereby further improving the stability and safety of the battery.
  • the top cover 100 can also be set according to requirements, and the sealing ring 125 can be sleeved outside the entire composite pole 104, so as to simultaneously seal and connect the inner pole 105 and the inner wall of the mounting hole 103, as well as the outer pole. 107 and the inner wall of the installation hole 103, so that the airtightness between the inner pole 105 and the outer pole 107 and the installation hole 103 is better, so as to further ensure the safety and reliability of the battery, and this embodiment will not repeat them .
  • the first pole body 113 is plugged into the installation hole 103 , and the sealing ring 125 is sleeved outside the pole boss 115 for sealing fit with the inner wall of the installation hole 103 .
  • the insulating limiter 127 is provided with an inner ring groove 129 and an outer ring groove 131.
  • the cover plate also includes an annular protrusion 135 located on the edge of the inner wall of the mounting hole 103.
  • the outer pole 107 is inserted into the inner ring groove 129, and the annular protrusion 135 It is inserted into the outer ring groove 131.
  • the sealing ring 125 is sleeved outside the pole boss 115, so that the cooperation between the pole boss 115 and the top cover 100 is more tight and reliable, thereby helping to ensure the reliability and stability of the overall structure obtained after stamping;
  • the insulating limiter 127 is provided with an inner ring groove 129 and an outer ring groove 131, the inner ring groove 129 can be closely matched with the second pole body 117, and the distance between the second pole body 117 and the top cover 100 can be ensured.
  • the airtightness between the outer ring groove 131 and the annular protrusion 135 can be matched, so that the airtightness of the composite pole 104 can be further improved after the combination of the sealing ring 125 and the insulating limiter 127, thereby fully ensuring the safety of the battery sex and reliability.
  • the upper part of the sealing ring 125 (the end away from the battery core) can also be set to abut against the lower part of the insulating limiting member 127 (the end close to the battery core), so as to further improve the contact between the entire composite pole 104 and The tightness and stability of the top cover plate 101 after fitting can further improve the safety and reliability of the battery.
  • the composite pole 104 can be arranged on the top cover 100 first; then, the battery cell is installed in the casing, the top cover plate 101 is matched with the casing, and the positive ear of the battery cell is connected to the positive electrode.
  • the inner pole 105 of the pole is electrically connected, and the negative pole ear of the battery cell is electrically connected with the inner pole 105 of the negative pole.
  • the copper plate can be first punched into a composite structure of the first pole body 113 with the pole boss 115 and the bus piece 133 to serve as the negative electrode.
  • the inner pole 105 of the pole while stamping the aluminum sheet into a composite structure of the first pole body 113 with the pole boss 115 and the busbar 133, as the inner pole 105 of the positive pole; then, the two The sealing rings 125 are respectively sleeved outside the pole bosses 115 of the two inner poles 105, and the pole bosses 115 protrude through the corresponding mounting holes 103 to pass through the sealing rings 125 and the corresponding mounting holes 103
  • the inner wall is pasted together; then, the two outer aluminum plates are used as the outer pole 107, and are respectively attached to the two inner poles 105, and are respectively stamped to form a negative pole and a composite structure with a composite structure of a concave groove and a protrusion.
  • Positive electrode pole finally, it is sufficient to arrange the two insulating limiters 127 between the two outer poles 107 and the top cover plate 101 respectively.
  • the composite pole 104 does not need to be connected by welding, and there is no problem of virtual welding. It only needs to use stamping and other methods to match the concave groove and the protrusion, and the matching method is simple, reliable and low cost.
  • the circumferential direction of the inner wall of the concave groove and the circumferential direction of the protrusion are closely fitted, and the end surface of the protrusion is also closely matched with the bottom of the concave groove, which can not only ensure that the composite pole
  • the rigidity of the column 104 can also ensure the electrical conductivity and airtight performance of the composite pole 104 , thereby effectively ensuring the quality, performance and safety performance of the composite pole 104 .
  • the embodiment of the present invention provides a simple, reliable and low-cost composite pole 104, which can effectively ensure the quality, performance and safety of the battery.
  • Embodiments of the present invention also provide a top cover 100 and a battery, which include the above-mentioned composite pole 104 . Therefore, it also has the advantages of low cost, good performance and high quality.

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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)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本发明公开了一种复合极柱、顶盖和电池，涉及电池技术领域；复合极柱包括内极柱和外极柱；内极柱设置有第一配合部；外极柱设置有与第一配合部配合的第二配合部；第一配合部和第二配合部二者中的一者为凹陷槽，第一配合部和第二配合部二者中的另一者为凸起，当第一配合部与第二配合部配合时，凸起的周向边缘与凹陷槽的槽内壁周向边缘贴合，凸起的端面与凹陷槽的槽底贴合。一方面，该极柱无需采用焊接方式连接，不存在虚焊，仅需采用冲压等方式将凹陷槽与凸起配合即可，具有配合方式简单、可靠且成本低的优点；另一方面，凹陷槽能与凸起形成紧密贴合的复合结构，还可能保证极柱的刚度、导电性和气密性，从而保证极柱质量、使用性能和安全性能。

Description

一种复合极柱、顶盖和电池 技术领域
本发明涉及电池技术领域，具体而言，涉及一种复合极柱、顶盖和电池。
背景技术
在锂离子动力电池技术领域，极柱是连通电池内外的部件，极柱的一端与电池内部的电芯连接，另一端与电池外部的用电设备的电路连接，以使得电池能为外部的用电设备供电，也能实现自身的充电。同时，由于电池的负极极柱通常采用铜质材料，而铜质材质较贵，因而为了节约成本，通常将极柱的内部与电芯连接的部分保持为原有的铜材质，以保证电池的使用性能，而将极柱的外部与用电设备连接的部分设置为成本相对较低的铝材质，铜材质和铝材质采用摩擦焊接的方式配合连接，以形成既能保证电池使用性能，成本又相对较低的复合极柱。
但是，现有技术中，采用摩擦焊接方式连接的复合极柱存在加工成本高，且容易在焊接过程中出现虚焊，影响了动力电池的质量和安全性能。
发明内容
本发明的目的在于提供一种配合方式简单、可靠且成本低的复合极柱，其能有效地保证电池的质量、使用性能和安全性能。
本发明的另一目的在于提供一种顶盖和电池，其包括上述的复合极柱。因此，其也具有成本低、性能好以及质量高的优点。
本发明的实施例是这样实现的：
第一方面，本发明提供一种复合极柱，包括：
内极柱，内极柱设置有第一配合部；
外极柱，外极柱设置有与第一配合部配合的第二配合部；
第一配合部和第二配合部二者中的一者为凹陷槽，第一配合部和第二配合部二者中的另一者为凸起，当第一配合部与第二配合部配合时，凸起的周向边缘与凹陷槽的槽内壁周向边缘贴合，凸起的端面与凹陷槽的槽底贴合。
在可选的实施方式中，内极柱具有极柱凸台，第一配合部为设置于极柱凸台的台顶壁的凹陷槽，凹陷槽的凹陷方向与极柱凸台的凸起方向相反，且凹陷槽的凹陷深度小于或等于极柱凸台的凸起高度，第二配合部为凸起。
在可选的实施方式中，内极柱包括第一极柱本体和凸设于第一极柱本体的极柱凸台，第一配合部设置于极柱凸台；外极柱包括第二极柱本体，第二配合部设置于第二极柱本体，当凹陷槽和凸起配合时，第二极柱本体与第一极柱本体贴合。
在可选的实施方式中，第一配合部的数量为多个，第二配合部的数量与第一配合部的数量匹配，以使得多个第二配合部与多个第一配合部一一对应地配合。
在可选的实施方式中，复合极柱还包括导电层，且导电层设置于第一配合部与第二配合部之间。
第二方面，本发明提供一种顶盖，包括：
顶盖板，顶盖板上开设有安装孔；
前述实施方式中任一项的复合极柱，复合极柱与安装孔插接，且从安装孔伸出。
在可选的实施方式中，顶盖包括密封圈，密封圈套设于复合极柱外，用 于同时密封连接内极柱与安装孔的内壁，以及外极柱与安装孔的内壁；
或者，
顶盖包括密封圈和绝缘限位件，密封圈设置于内极柱与安装孔的内壁之间，用于密封连接内极柱与安装孔的内壁；绝缘限位件设置于外极柱与安装孔的内壁之间，用于限制外极柱相对顶盖的位置。
在可选的实施方式中，顶盖包括密封圈和绝缘限位件；内极柱包括第一极柱本体和凸设于第一极柱本体的极柱凸台，密封圈套设于极柱凸台外，用于与安装孔的内壁密封配合；绝缘限位件开设有内环槽和外环槽，盖板还包括位于安装孔的内壁边缘的环形凸起，外极柱与内环槽插接，环形凸起与外环槽插接。
在可选的实施方式中，顶盖板上开设有两个安装孔，顶盖包括两个复合极柱，且一个复合极柱为负极极柱，另一个复合极柱为正极极柱，负极极柱和正极极柱分别安装于对应的安装孔处；且负极极柱的内极柱为铜材质或铝材质，负极极柱的外极柱为铝材质；正极极柱的内极柱和外极柱的材质均为铝材质。
在可选的实施方式中，顶盖还包括汇流片，汇流片与复合极柱的内极柱一体成型，且贴设于顶盖板的侧壁。
第三方面，本发明提供一种电池，包括：
前述实施方式中任一项的复合极柱；或者，前述实施方式中任一项的顶盖。
本发明的实施例至少具备以下优点或有益效果：
本发明的实施例提供了一种复合极柱，其包括内极柱和外极柱；内极柱 设置有第一配合部；外极柱设置有与第一配合部配合的第二配合部；第一配合部和第二配合部二者中的一者为凹陷槽，第一配合部和第二配合部二者中的另一者为凸起，当第一配合部与第二配合部配合时，凸起的周向边缘与凹陷槽的槽内壁周向边缘贴合，凸起的端面与凹陷槽的槽底贴合。一方面，该复合极柱无需采用焊接方式进行连接，不存在虚焊问题，仅需要采用冲压等方式将凹陷槽与凸起配合即可，具有配合方式简单、可靠且成本低的优点；另一方面，在凹陷槽和凸起配合形成的复合结构中，凹陷槽的槽内壁的周向与凸起的周向紧密贴合，凸起的端面也与凹陷槽的槽底紧密贴合，不仅能保证复合极柱的刚度，还能保证复合极柱的导电和气密性能，从而能有效地保证复合极柱的质量、使用性能和安全性能。
本发明的实施例还提供了一种顶盖和电池，其包括上述的复合极柱。因此，其也具有成本低、性能好以及质量高的优点。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本发明的实施例提供的一种顶盖的结构示意图；
图2为本发明的实施例提供的一种顶盖的局部剖面示意图；
图3为本发明的实施例提供的一种顶盖的局部分解示意图；
图4为本发明的实施例提供的一种顶盖的局部结构示意图；
图5为本发明的实施例提供的另一种顶盖的结构示意图；
图6为本发明的实施例提供的另一种顶盖的局部剖面示意图；
图7为本发明的实施例提供的另一种顶盖的局部分解示意图；
图8为本发明的实施例提供的另一种顶盖的局部结构示意图。
图标:100-顶盖；101-顶盖板；103-安装孔；104-复合极柱；105-内极柱；107-外极柱；109-盖体；111-塑胶体；113-第一极柱本体；115-极柱凸台；117-第二极柱本体；119-容置槽；121-第一配合部；123-第二配合部；125-密封圈；127-绝缘限位件；129-内环槽；131-外环槽；133-汇流片；135-环形凸起。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本发明实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义 和解释。
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”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，或者是该发明产品使用时惯常摆放的方位或位置关系，仅是为了便于描述本发明和简化描述，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发明的限制。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
此外，术语“水平”、“竖直”等术语并不表示要求部件绝对水平或悬垂，而是可以稍微倾斜。如“水平”仅仅是指其方向相对“竖直”而言更加水平，并不是表示该结构一定要完全水平，而是可以稍微倾斜。
在本发明的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，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。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发明中的具体含义。
相关技术中，电池的复合极柱的内极柱和外极柱之间通常通过摩擦焊接的方式配合，摩擦焊接连接内极柱和外极柱容易在焊接过程中出现虚焊，使得容易出现极柱脱落等问题，影响了动力电池的质量和安全性能。有鉴于此，本实施例提供了一种电池，其复合极柱的内极柱和外极柱可通过配合部配合连接，可避免采用焊接方式进行连接，因而能避免出现虚焊问题，具有配合 方式简单、可靠且成本低的优点，能有效地保证电池的质量、使用性能和安全性能。下面对该电池的结构进行详细地介绍。
图1为本实施例提供的一种顶盖100的结构示意图。请参阅图1，本实施例提供了电池，其包括壳体(图未示出)、电芯(图未示出)和顶盖100。壳体为一端具有开口的空心方形结构，电芯设置于壳体内部，顶盖100设置于壳体的开口处，且与电芯电连接。
详细地，请再次参阅图1，在本实施例中，顶盖100具体包括顶盖板101和复合极柱104。其中，顶盖板101上开设有两个安装孔103，复合极柱104的数量为两个，且一个为负极极柱，另一个为正极极柱，负极极柱与对应位置的安装孔103插接，且从安装孔103伸出，负极极柱的靠近电芯的内侧与电芯的负极极耳电连接，负极极柱从安装孔103伸出的部分用于与外部用电设备的负极连接，正极极柱也与对应位置的安装孔103插接，且从安装孔103伸出，正极极柱的靠近电芯的内侧与电芯的正极极耳电连接，正极极柱从安装孔103伸出的部分用于与外部用电设备的正极连接，以使得电池能进行正常的充放电作业。
图2为本实施例提供的一种顶盖100的局部剖面示意图；图3为本实施例提供的一种顶盖100的局部分解示意图；图4为本实施例提供的一种顶盖100的局部结构示意图。请参阅图1至图4，在本实施例中，复合极柱104所适用的电池具体选择为锂离子电池，当适用于锂离子电池时，无论是正极极柱还是负极极柱，该复合极柱104均包括内极柱105和外极柱107，其中，负极极柱的内极柱105用于与电芯的正极极耳电连接，其材质选择为铜质材质，以保证电池的使用性能，负极极柱的外极柱107用于与外部用电设备的负极 连接，其材质选择为铝质材质，能节约成本。同理，正极极柱的内极柱105和负极柱的材质均为铝材质，以进一步地节约制造成本。当然，在其他实施例中，该复合极柱104也可以适用于钠离子电池，当适用于钠离子电池时，复合极柱104的正极极柱和负极极柱的材质均为铝材质，本实施例不做限定。
详细地，为了保证复合极柱104的稳定性与可靠性，在本实施例中，内极柱105设置有第一配合部121。外极柱107设置有与第一配合部121配合的第二配合部123。并且，第一配合部121和第二配合部123二者中的一者为凹陷槽，第一配合部121和第二配合部123二者中的另一者为凸起。同时，当第一配合部121与第二配合部123配合时，凸起的周向边缘与凹陷槽的槽内壁周向边缘贴合，凸起的端面与凹陷槽的槽底贴合。
通过这样设置，一方面，该复合极柱104的内极柱105和外极柱107的配合无需再采用焊接方式进行连接，因而不存在虚焊问题，也可以降低极柱脱落的风险，避免焊接引发的炸洞、焊穿、漏气等问题的出现。同时，本实施例的复合极柱104仅需要采用冲压等方式将凹陷槽与凸起配合即可，冲压相较于焊接方式而言具有配合方式简单、可靠且成本低的优点；另一方面，采用冲压方式使得凹陷槽的槽内壁的周向与凸起的周向紧密贴合，凸起的端面也与凹陷槽的槽底紧密配合，因而不仅能保证复合极柱104的刚度，还能保证复合极柱104的导电性能和气密性能，从而能有效地保证复合极柱104的质量、使用性能和安全性能。
需要说明的是，在本实施例中，内极柱105和外极柱107具体通过冲压的方式形成第一配合部121与第二配合部123的复合配合结构。将二者采用冲压的方式紧密配合，可在控制成本，提高效率的同时，还能通过二者冲压 后形成的结构起到过电流和相对固定的作用，从而能充分保证复合极柱104的稳定性能、安全性能和使用性能，进而能保证电池的安全性和可靠性。当然，在其他实施例中，也可以先冲压得到第一配合部121和第二配合部123，再将二者通过粘结配合等方式配合，能保证凹陷槽与凸起紧密配合，以保证复合极柱104的性能即可，本实施例不再赘述。
图5为本实施例提供的另一种顶盖100的结构示意图；图6为本实施例提供的另一种顶盖100的局部剖面示意图；图7为本实施例提供的另一种顶盖100的局部分解示意图；图8为本实施例提供的另一种顶盖100的局部结构示意图。请参阅图1至图8，在本实施例中，第一配合部121的数量可设置为多个，也可以设置为一个，第二配合部123的数量与第一配合部121的数量匹配。例如，图1至图4所示，第一配合部121和第二配合部123的数量均为一个，又例如图5至图8所示，第一配合部121和第二配合部123的数量均为两个，以进一步地保证复合极柱104的稳定性与可靠性，从而保证电池的安全性能和使用性能。当然，在其他实施例中，第一配合部121和第二配合部123的数量还可以根据需求进行调整，例如可设置为三个、四个等，本实施例不再赘述。
详细地，无论第一配合部121和第二配合部123的数量为几个，也无论复合极柱104是正极极柱还是负极极柱，在本实施例中，内极柱105均凸设有极柱凸台115，极柱凸台115的设置便于与安装孔103插接，以使得外极柱107能从安装孔103露出，以与外部用电设备连接。同时，第一配合部121具体为设置于极柱凸台115的台顶壁的凹陷槽，凹陷槽的凹陷方向与极柱凸台115的凸起方向相反，且凹陷槽的凹陷深度小于或等于极柱凸台115的凸起高 度，第二配合部123为凸起。
在本实施例中，第一配合部121为凹陷槽，第二配合部123为凸起，通过这样设置，在进行加工作业时，可先将内极柱105冲压出极柱凸台115，然后将内极柱105和外极柱107贴合，并共同将二者冲压出贴合设置的凹陷槽和凸起的复合结构即可，简单、便捷且效率高效。同时，由于本实施例中，凹陷槽的凹陷方向与极柱凸台115的凸起方向相反，这使得极柱凸台115的冲压方向与凹陷槽和凸起的复合结构的冲压方向相反，能进一步地保证凹陷槽和凸起的复合结构冲压后的气密性和稳定性，从而能进一步地保证复合极柱104的稳定性和可靠性。另外，由于凹陷槽的凹陷深度小于或等于极柱凸台115的凸起高度，因而使得冲压过程无需占用其他的空间，能使得整体结构更紧凑和稳定性，能更进一步地保证复合极柱104的稳定性和可靠性。
需要说明的是，在本实施例中，内极柱105冲压得到的极柱凸台115靠近电芯的一侧具有容置槽119，内极柱105和外极柱107同时冲压形成的凹陷槽和凸起的复合冲压结构容置于容置槽119内，以能保证复合冲压结构的安全性的同时，进一步地保证二者复合后结构的可靠性，从而充分保证电池的安全性和可靠性。
还需要说明的是，在其他实施例中，凹陷槽也可以设置于外极柱107，凸起也可以设置于内极柱105，此时内极柱105的极柱凸台115的冲压方向与凹陷槽和凸起的复合结构的冲压方向相同，本实施例不再赘述。
请再次参阅图2至图4，以及图6至图8，在本实施例中，内极柱105具体还包括第一极柱本体113，极柱凸台115凸设于第一极柱本体113。与之对应，外极柱107包括第二极柱本体117，当凹陷槽和凸起配合时，第二极柱本 体117与第一极柱本体113贴合。也即，当内极柱105和外极柱107冲压形成凹陷槽和凸起的复合冲压结构时，还能保证第一极柱本体113和第二极柱本体117贴合设置，因而能进一步地保证复合极柱104的气密性、稳定性和可靠性，能进一步地提高电池的安全性和可靠性。
作为可选的方案，在本实施例中，凹陷槽具有槽口和与槽口相对的槽底，且沿槽口至槽底的方向凹陷槽的内径先减小后增大。也即，凹陷槽的形状设置为靠近槽底的位置更大些，使得冲压形成凸起与凹陷槽复合的配合结构后，凸起不易从凹陷槽脱出，外极柱107更不易与内极柱105分离，从而结构更紧凑，进而能进一步地保证电池的安全性与可靠性。
进一步可选地，在本实施例中，复合极柱104还可以根据需求设置导电层(图未示出)，导电层位于第一配合部121和第二配合部123之间。其中，导电层为较软的导电材质制备得到的结构，其可与内极柱105以及外极柱107共同冲压后，得到与第一配合部121和第二配合部123配合的复合结构，以增加第一配合部121和第二配合部123之间的接触面积，以增强第一配合部121和第二配合部123之间的导电性，从而进一步地保证电池的安全性与可靠性。
请再次参阅图2至图4，以及图6至图8，在本实施例中，顶盖板101靠近电芯的一侧还设置有汇流片133，汇流片133的一端与内极柱105连接，汇流片133的另一端与电芯的极耳连接，以连通电池内外。其中，汇流片133与内极柱105的第一极柱本体113一体成型。具体地，可采用铜材质直接冲压得到连接设置的内极柱105和汇流片133，以简化制造过程，提高制造效率，并保证制造得到的复合极柱104的稳定性与可靠性。
需要说明的是，由于本实施例中，汇流片133与内极柱105一体成型，因而通过这样设置还能改变电池原有的装配顺序。详细地，现有技术由于极柱与汇流结构分开设置，因而在极柱与电芯的极耳配合时，需要先将汇流结构安装至顶盖，先与顶盖的极柱焊接配合，然后再将整个顶盖装配至电池壳体，以使得汇流结构再与极耳焊接，这样的安装方式工序复杂，对汇流结构安装和焊接前后的精度要求高，因而也不便于操作。因而，本实施例将汇流片133与内极柱105一体成型，在装配过程中，直接将二者一体成型后的结构与极耳焊接后再安装于顶盖即可，可有效地简化工序，节约成本，提高装配和制造效率。
请再次参阅图2至图4，以及图6至图8，在本实施例中，顶盖板101具体包括盖体109和设置于盖体109靠近电芯一侧的塑胶体111，塑胶体111能提供绝缘保护的功能，以进一步地保证电池的安全性。同时，顶盖100的安装孔103贯穿顶盖板101和塑胶体111设置。且内极柱105贴合于塑胶体111靠近电芯的一侧，内极柱105的极柱凸台115与安装孔103插接。同时，汇流片133同样贴合于塑胶体111靠近电芯的一侧，以便于与电芯的极耳电连接，从而保证电池充放电作业的高效进行。
作为可选的方案，在本实施例中，顶盖100包括密封圈125和绝缘限位件127。其中，密封圈125设置于内极柱105与安装孔103的内壁之间，用于密封连接内极柱105与安装孔103的内壁；绝缘限位件127设置于外极柱107与安装孔103的内壁之间，用于限制外极柱107相对顶盖100的位置。通过密封圈125和绝缘限位件127的设置，使得复合极柱104与安装孔103之间的气密性更好，二者配合的结构更紧凑和可靠，从而利于保证复合极柱104 的使用性能和安全性能，进而能进一步地提高电池的可靠性和稳定性。同时，绝缘限位件127的材质具体选择为pps，具有刚性好以及绝缘的优点，因而还能与密封圈125配合提供良好的限位和绝缘作用，以保证密封圈125的压缩量，从而可以为复合极柱104和顶盖100之间的配合提供限位和绝缘作用，以进一步地提高复合极柱104的稳定性和安全性，从而进一步地提高电池的稳定性和安全性。
当然，在其他实施例中，顶盖100也可以根据需求设置将密封圈125套设于整个复合极柱104外，用于同时密封连接内极柱105与安装孔103的内壁，以及外极柱107与安装孔103的内壁，使得内极柱105和外极柱107与安装孔103之间的气密性更好，从而能进一步地保证电池的安全性和可靠性，本实施例不再赘述。
详细地，第一极柱本体113与安装孔103插接，且密封圈125具体套设于极柱凸台115外，用于与安装孔103的内壁密封配合。绝缘限位件127开设有内环槽129和外环槽131，盖板还包括位于安装孔103的内壁边缘的环形凸起135，外极柱107与内环槽129插接，环形凸起135与外环槽131插接。一方面，将密封圈125套设于极柱凸台115外，使得极柱凸台115与顶盖100的配合更紧密和可靠，从而利于保证冲压后得到的整体结构的可靠性和稳定性；另一方面，由于绝缘限位件127开设有内环槽129和外环槽131，内环槽129能与第二极柱本体117紧密配合，能保证第二极柱本体117与顶盖100之间的气密性，外环槽131又能与环形凸起135配合，使得复合极柱104与密封圈125和绝缘限位件127配合后气密性进一步地提高，从而能充分保证电池的安全性和可靠性。
进一步可选地，还可以将密封圈125的上部(远离电芯的一端)设置为与绝缘限位件127的下部(靠近电芯的一端)抵接，以进一步地提高整个复合极柱104与顶盖板101配合后的密封性和稳定性，从而进一步地提高电池的安全性和可靠性。
下面对本发明的实施例提供的电池的制备过程、工作原理和有益效果进行详细地说明：
在进行电池的制备作业时，可先将复合极柱104设置于顶盖100；接着，将电芯安装于壳体内，将顶盖板101与壳体配合，并将电芯的正极耳与正极极柱的内极柱105电连接，将电芯的负极耳与负极极柱的内极柱105电连接即可。其中，在将复合极柱104设置于顶盖板101的过程中，可先将铜板材冲压成具有极柱凸台115的第一极柱本体113和汇流片133的复合结构，以作为负极极柱的内极柱105，同时将铝板材冲压成具有极柱凸台115的第一极柱本体113和汇流片133的复合结构，以作为正极极柱的内极柱105；接着，将两个密封圈125分别套设于两个内极柱105的极柱凸台115外，并使极柱凸台115穿过对应安装孔103后伸出，以通过密封圈125与对应位置的安装孔103的内壁贴合；然后，将两个外部铝板材作为外极柱107，且分别与两个内极柱105贴合，并分别冲压形成具有凹陷槽和凸起复合的复合结构的负极极柱和正极极柱；最后，将两个绝缘限位件127分别设置于两个外极柱107与顶盖板101之间即可。
在上述过程中，一方面，该复合极柱104无需采用焊接方式进行连接，不存在虚焊问题，仅需要采用冲压等方式将凹陷槽与凸起配合即可，具有配合方式简单、可靠且成本低的优点；另一方面，进行冲压作业时，凹陷槽的 槽内壁的周向与凸起的周向紧密贴合，凸起的端面也与凹陷槽的槽底紧密配合，不仅能保证复合极柱104的刚度，还能保证复合极柱104的导电和气密性能，从而能有效地保证复合极柱104的质量、使用性能和安全性能。
综上所述，本发明的实施例提供了一种配合方式简单、可靠且成本低的复合极柱104，其能有效地保证电池的质量、使用性能和安全性能。本发明的实施例还提供了一种顶盖100和电池，其包括上述的复合极柱104。因此，其也具有成本低、性能好以及质量高的优点。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种复合极柱，其特征在于，包括：
    内极柱，所述内极柱设置有第一配合部；
    外极柱，所述外极柱设置有与所述第一配合部配合的第二配合部；
    所述第一配合部和所述第二配合部二者中的一者为凹陷槽，所述第一配合部和所述第二配合部二者中的另一者为凸起，当所述第一配合部与所述第二配合部配合时，所述凸起的周向边缘与所述凹陷槽的槽内壁周向边缘贴合，所述凸起的端面与所述凹陷槽的槽底贴合。
  2. 根据权利要求1所述的复合极柱，其特征在于：
    所述内极柱具有极柱凸台，所述第一配合部为设置于所述极柱凸台的台顶壁的凹陷槽，所述凹陷槽的凹陷方向与所述极柱凸台的凸起方向相反，且所述凹陷槽的凹陷深度小于或等于所述极柱凸台的凸起高度，所述第二配合部为凸起。
  3. 根据权利要求1所述的复合极柱，其特征在于：
    所述内极柱包括第一极柱本体和凸设于所述第一极柱本体的极柱凸台，所述第一配合部设置于所述极柱凸台；所述外极柱包括第二极柱本体，所述第二配合部设置于所述第二极柱本体，当所述凹陷槽和所述凸起配合时，所述第二极柱本体与所述第一极柱本体贴合。
  4. 根据权利要求1所述的复合极柱，其特征在于：
    所述第一配合部的数量为多个，所述第二配合部的数量与所述第一配合部的数量匹配，以使得多个所述第二配合部与多个所述第一配合部一一对应地配合。
  5. 根据权利要求1所述的复合极柱，其特征在于：
    所述复合极柱还包括导电层，且所述导电层设置于所述第一配合部与所 述第二配合部之间。
  6. 一种顶盖，其特征在于，包括：
    顶盖板，所述顶盖板上开设有安装孔；
    权利要求1至5中任一项所述的复合极柱，所述复合极柱与所述安装孔插接，且从所述安装孔伸出。
  7. 根据权利要求6所述的顶盖，其特征在于：
    所述顶盖包括密封圈，所述密封圈套设于所述复合极柱外，用于同时密封连接所述内极柱与所述安装孔的内壁，以及所述外极柱与所述安装孔的内壁；
    或者，
    所述顶盖包括密封圈和绝缘限位件，所述密封圈设置于所述内极柱与所述安装孔的内壁之间，用于密封连接所述内极柱与所述安装孔的内壁；所述绝缘限位件设置于所述外极柱与所述安装孔的内壁之间，用于限制所述外极柱相对所述顶盖的位置。
  8. 根据权利要求7所述的顶盖，其特征在于：
    所述顶盖包括密封圈和绝缘限位件；所述内极柱包括第一极柱本体和凸设于所述第一极柱本体的极柱凸台，所述密封圈套设于所述极柱凸台外，用于与所述安装孔的内壁密封配合；所述绝缘限位件开设有内环槽和外环槽，所述盖板还包括位于所述安装孔的内壁边缘的环形凸起，所述外极柱与所述内环槽插接，所述环形凸起与所述外环槽插接。
  9. 根据权利要求6所述的顶盖，其特征在于：
    所述顶盖板上开设有两个所述安装孔，所述顶盖包括两个所述复合极柱，且一个所述复合极柱为负极极柱，另一个所述复合极柱为正极极柱，所述负 极极柱和所述正极极柱分别安装于对应的所述安装孔处；且所述负极极柱的所述内极柱为铜材质或铝材质，所述负极极柱的外极柱为铝材质；所述正极极柱的所述内极柱和所述外极柱的材质均为铝材质。
  10. 根据权利要求6所述的顶盖，其特征在于：
    所述顶盖还包括汇流片，所述汇流片与所述复合极柱的内极柱一体成型，且贴设于所述顶盖板的侧壁。
  11. 一种电池，其特征在于，包括：
    权利要求1至5中任一项所述的复合极柱；或者，权利要求6至10中任一项所述的顶盖。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110224104A (zh) * 2018-03-02 2019-09-10 比亚迪股份有限公司 电池的负极柱、电池的盖板组件、电池和电动汽车
CN110854308A (zh) * 2019-12-24 2020-02-28 瑞浦能源有限公司 一种锂离子电池顶盖及锂离子电池
CN210325972U (zh) * 2019-07-04 2020-04-14 湖北金泉新材料有限责任公司 极柱、包含其的顶盖及电池
CN113629329A (zh) * 2021-09-09 2021-11-09 东莞塔菲尔新能源科技有限公司 一种复合极柱、顶盖和电池
CN216311920U (zh) * 2021-09-09 2022-04-15 江苏正力新能电池技术有限公司 一种复合极柱、顶盖和电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110224104A (zh) * 2018-03-02 2019-09-10 比亚迪股份有限公司 电池的负极柱、电池的盖板组件、电池和电动汽车
CN210325972U (zh) * 2019-07-04 2020-04-14 湖北金泉新材料有限责任公司 极柱、包含其的顶盖及电池
CN110854308A (zh) * 2019-12-24 2020-02-28 瑞浦能源有限公司 一种锂离子电池顶盖及锂离子电池
CN113629329A (zh) * 2021-09-09 2021-11-09 东莞塔菲尔新能源科技有限公司 一种复合极柱、顶盖和电池
CN216311920U (zh) * 2021-09-09 2022-04-15 江苏正力新能电池技术有限公司 一种复合极柱、顶盖和电池

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