WO2025118564A1 - 一种金属壳体及电池、电池的制备方法 - Google Patents

一种金属壳体及电池、电池的制备方法 Download PDF

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Publication number
WO2025118564A1
WO2025118564A1 PCT/CN2024/101840 CN2024101840W WO2025118564A1 WO 2025118564 A1 WO2025118564 A1 WO 2025118564A1 CN 2024101840 W CN2024101840 W CN 2024101840W WO 2025118564 A1 WO2025118564 A1 WO 2025118564A1
Authority
WO
WIPO (PCT)
Prior art keywords
shell
battery
groove
receiving groove
receiving
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.)
Pending
Application number
PCT/CN2024/101840
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English (en)
French (fr)
Inventor
沈晞
蒋露霞
李炳胜
陈晓君
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.)
Jiangsu Morlus Technology Co Ltd
Original Assignee
Jiangsu Morlus Technology 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 CN202311664975.XA external-priority patent/CN120109464A/zh
Priority claimed from CN202311664984.9A external-priority patent/CN120109382A/zh
Priority claimed from CN202311656305.3A external-priority patent/CN117525531A/zh
Application filed by Jiangsu Morlus Technology Co Ltd filed Critical Jiangsu Morlus Technology Co Ltd
Publication of WO2025118564A1 publication Critical patent/WO2025118564A1/zh
Anticipated expiration legal-status Critical
Pending 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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 invention belongs to the technical field of batteries, and in particular relates to a metal shell, a battery, and a method for preparing the battery.
  • lithium battery filling processes usually include primary filling and secondary filling. After the primary filling, formation is required, that is, through a high-temperature aging room, the electrolyte is allowed to penetrate into the electrode and the diaphragm, participate in the chemical reaction, and realize the conversion of chemical energy into electrical energy; the secondary filling is the process of replenishing the electrolyte after formation.
  • the technical problem to be solved by the present invention is: to provide a metal shell, a battery and a method for preparing the battery in view of the problem that the liquid injection forming process in the prior art is complicated.
  • an embodiment of the present invention provides a metal shell, comprising a first shell and a second shell respectively formed by folding a substrate along a first straight line; the first shell is in the shape of a flat plate; the second shell is provided with a first accommodating groove and a second accommodating groove arranged at intervals, and the first accommodating groove and the second accommodating groove are both recessed in a direction away from the first shell; one side surface of the first shell and one side surface of the second shell are arranged opposite to each other, and the outer edges of the first shell and the second shell are fixedly connected by welding and sealing, so that the first shell closes the first accommodating groove and the second accommodating groove, and the first accommodating groove is used to accommodate the pole core; the volume of the first accommodating groove is greater than or equal to the volume of the second accommodating groove.
  • an embodiment of the present invention further provides a battery, comprising a pole core, a cover plate assembly and the metal shell described above, wherein the pole core is connected to the cover plate assembly, the metal shell comprises a accommodating portion and a storage portion, the accommodating portion is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is used to accommodate the pole core, the first accommodating cavity is formed by the first shell closing the first accommodating groove, the second accommodating cavity is arranged at one end of the first accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity, and the second accommodating cavity is used to accommodate the cover plate assembly; the storage portion comprises an air bag for storing electrolyte or gas and an injection edge for injection, the air bag is formed by the first shell closing the second accommodating groove, the air bag is arranged at one side of the first accommodating cavity, and is communicated with the first accommodating cavity; A sealing end is provided on a side of the air bag away from the first accommodating cavity.
  • the present application provides a battery manufacturing method, including: connecting a cover assembly to a pole ear of a battery pole core; placing the battery pole core in a first receiving groove of a metal shell, and placing the cover assembly on a cover mounting position connected to the first receiving groove; bending the metal shell along a first straight line so that the first receiving groove of the metal shell forms a first receiving cavity, and the second receiving groove of the battery shell forms an air bag; connecting two first side surfaces of the metal shell and injecting liquid into the first receiving cavity; welding a side surface opposite to the first side edge of the metal shell to form the first receiving cavity; cutting off the air bag and evacuating the first receiving cavity; and sealing the first receiving cavity.
  • the electrolyte stored in the second holding tank enters the first holding tank for infiltration and replenishment, and the gas generated by the formation enters the second holding tank from the first holding tank, eliminating the need for the complicated operation of plugging the liquid injection holes multiple times as in the prior art.
  • FIG1 is an overall schematic diagram of the manufacturing process of the metal housing provided by the first embodiment of the present application.
  • FIG2 is a schematic diagram of an expanded substrate of a metal shell provided in the first embodiment of the present application.
  • FIG3 is a side view schematic diagram of a metal housing provided in the first embodiment of the present application.
  • FIG4 is a schematic diagram of exhausting the second receiving groove of the metal shell provided by the first embodiment of the present application after being flattened;
  • FIG5 is a schematic diagram of a battery structure (including an extension portion) provided in accordance with another embodiment of the present application.
  • FIG6 is a schematic diagram of a battery structure (excluding an extension portion) provided in accordance with another embodiment of the present application.
  • FIG. 7 is a schematic diagram of an explosion of a battery (without an extension portion) provided in another embodiment of the present application.
  • FIG8 is a schematic diagram of a battery structure (the storage portion is perpendicular to the first accommodating cavity) provided in another embodiment of the present application;
  • FIG9 is a cross-sectional view of a battery provided by an embodiment of another aspect of the present application.
  • FIG10 is an enlarged view of portion A in FIG9 ;
  • FIG11 is a schematic structural diagram of a cover plate assembly provided in another embodiment of the present application.
  • FIG12 is a flow chart of a battery manufacturing method in the present application.
  • FIG13 is a schematic diagram of the first sealing method in the battery manufacturing method of the present application.
  • FIG14 is a schematic diagram of a second sealing method in the battery manufacturing method of the present application.
  • FIG15 is a schematic diagram of a third sealing method in the battery manufacturing method of the present application.
  • FIG16 is an enlarged view of point A in FIG15 ;
  • FIG. 17 is a diagram showing the steps of the battery manufacturing method in this application.
  • FIG18 is an exploded view of the cover assembly in the present application.
  • FIG19 is an isometric view of a battery housing in the present application.
  • FIG. 20 is an isometric view of the battery core in the present application.
  • 100 battery; 1, metal shell; 101, substrate; 102, first shell; 103, second shell; 2, first receiving groove; 3, second receiving groove; 4, first groove; 5, second groove; 6, first straight line; 7, injection edge; 8, extension; 81, first cutting piece; 82, second cutting piece; 9, pole core; 91, pole ear; 10, storage part; 11, cover plate installation position; 13, cover plate assembly; 130, lead-out piece; 132, insulating member; 1321, second installation hole; 1322, insulating body; 1323, limiting part; 1324, clamping part; 133, cover plate body; 134, first welding surface; 135, second welding surface; 1351, plane; 1352, inclined surface; 1353, arc surface; 136, first installation hole; 137, clamping groove; 14. Inner insulating film; 15. Outer insulating film; 16. Heat dissipation fins.
  • the metal shell 1 provided in the first embodiment of the present invention comprises a first shell 102 and a second shell 103 formed by folding a substrate 101 along a first straight line 6.
  • the first shell 102 and the second shell 103 are integrally formed, and the first shell 102 and the second shell 103 are artificially divided into the first shell 102 and the second shell 103 after the flat plate-shaped substrate 101 is folded along the first straight line 6.
  • the first shell 102 is in the shape of a flat plate;
  • the second shell 103 is provided with a first receiving groove 2 and a second receiving groove 3 arranged at intervals, and the first receiving groove 2 and the second receiving groove 3 are both formed by recessing in a direction away from the first shell 102.
  • the first receiving groove 2 and the second receiving groove 3 are formed by stamping.
  • a side surface of the first shell 102 and a side surface of the second shell 103 are arranged oppositely, and the edge of the first shell 102 and the edge of the second shell 103 are welded and sealed, so that the first shell 102 closes the first receiving groove 2 and the second receiving groove 3, the first receiving groove 2 is used to accommodate the pole core, and the second receiving groove 3 is used for exhaust or injection.
  • the two edges of the substrate 101 adjacent to the first straight line 6 are welded, and there is only one unwelded edge between the first shell 102 and the second shell 103, which is the edge for electrolyte injection, and is called the liquid injection edge 7.
  • the electrolyte enters the second receiving tank 3 through the liquid injection edge 7 and then flows into the first receiving tank 2.
  • the second receiving tank 3 is a liquid injection bag, and electrolyte can also be stored in the liquid injection bag.
  • the liquid in the liquid injection bag can gradually infiltrate into the pole core 9, and the liquid injection is completed at one time and the liquid injection is fast, and the processing cycle is greatly shortened.
  • the second containing tank 3 is an exhaust bag, and the gas generated by the pole core 9 during the formation process is discharged from the first containing tank 2 into the second containing tank 3 for collection, and finally the second containing tank 3 is flattened by external equipment to achieve one-time gas discharge, and there is no need for continuous vacuum exhaust during the formation process.
  • the second receiving tank 3 stores excess electrolyte to enter the first receiving tank 2 for infiltration and replenishment of electrolyte at a later stage.
  • the gas generated by the formation enters from the first receiving tank 2 and accumulates in the second receiving tank 3.
  • the injection edge 7 is temporarily closed.
  • the gas in the second receiving tank 3 is emptied once and for all, without the need to close the injection hole multiple times as in the prior art.
  • the metal shell 1 in this embodiment is not an aluminum-plastic film shell, but a shell made of metal with a certain hardness.
  • the traditional soft-packed aluminum-plastic film is relatively poor in sealing compared to the present application because the soft-packed aluminum-plastic film adopts hot melting instead of laser welding in the present application. And the poor thermal conductivity of the soft-packed aluminum-plastic film makes the heat dissipation of the battery 100 poor, and the soft-packed aluminum-plastic film easily causes the service life of the battery 100 to be low.
  • the first receiving groove 2 is close to the first straight line 6, and the second receiving groove 3 is located on the side of the first receiving groove 2 away from the first straight line 6.
  • the second housing 103 is provided with a first groove 4 and a second groove 5 opening outward, respectively, the first groove 4 is connected to the second receiving groove 3, and the second groove 5 is connected to the second receiving groove 3.
  • the first groove 4 and the second groove 5 are respectively used to place the cover assembly 13 of the battery 100.
  • the first groove 4 and the second groove 5 in this embodiment can be arranged on opposite sides of the first accommodating groove 2 , or can be arranged on the same side of the first accommodating groove 2 . This is not limited in this embodiment and is determined by practical applications.
  • the substrate 101 further includes a first cutting piece 81 and a second cutting piece 82.
  • the first cutting piece 81 and the first shell 102 are integrally formed, and the first cutting piece 81 is arranged on a side of the first shell 102 away from the first straight line 6.
  • the second cutting piece 82 and the second shell 103 are integrally formed, and the second cutting piece 82 is arranged on a side of the second shell 103 away from the first straight line 6.
  • the projections of the first cutting piece 81 and the second cutting piece 82 on the first shell 102 partially or completely overlap, and the first cutting piece 81 and the second cutting piece 82 are arranged opposite to each other.
  • the first cutting piece 81 and the second cutting piece 82 are clamped by a clamp of an external device or manually, respectively, to open the unwelded edges between the first shell 102 and the second shell 103, thereby facilitating liquid injection.
  • first cutting piece 81 and the second cutting piece 82 are retained. In other embodiments, for aesthetic and volume considerations, after the injection edge 7 is welded, the first cutting piece 81 and the second cutting piece 82 can be cut off, so that the metal shell 1 is in a cube shape.
  • the volume of the first receiving tank 2 is greater than or equal to the volume of the second receiving tank 3.
  • the second receiving tank 3 in the metal shell 1 is used as a liquid storage bag in the subsequent liquid injection process of the battery 100 processing, and can be used to temporarily store the electrolyte required for the infiltration of the battery cell in the first receiving tank 2. During the infiltration process of the battery cell, the electrolyte temporarily stored in the second receiving tank 3 will gradually penetrate into the first receiving tank 2.
  • the second receiving tank 3 is used as an exhaust bag in the subsequent formation process of the battery 100 processing, and can be used to temporarily store the gas generated by the formation of the battery 100.
  • the second receiving tank 3 can be separated from the first receiving tank 2 by cutting, or the second receiving tank 3 can be flattened by exhausting, so that the metal shell 1 forms a heat dissipation fin 16 at the second receiving tank 3. Therefore, under the premise of meeting the processing requirements of the battery cell in the first receiving tank 2, the volume of the second receiving tank 3 is as small as possible, and it is bound to make the volume of the first receiving tank 2 greater than or equal to the volume of the second receiving tank 3.
  • the length of the first receiving groove 2 is the same as that of the second receiving groove 3.
  • the volume of the first receiving groove 2 is larger than that of the second receiving groove 3, but the lengths of the two are the same, and the length direction of the second receiving groove 3 is parallel to the first straight line 6.
  • the ratio of the cross-sectional area of the first receiving groove 2 to the cross-sectional area of the second receiving groove 3 is 1:0.05 to 1:0.5.
  • the cross-sectional area of the first receiving groove 2 is related to the cross-sectional area of the second receiving groove 3. The larger the cross-sectional area of the first receiving groove 2, the larger the cross-sectional area of the second receiving groove 3.
  • the cross-sectional area of the first receiving groove 2 is 6 times the cross-sectional area of the second receiving groove 3, which can meet the exhaust and liquid injection requirements of the battery cell inside the first receiving groove 2 during the processing process, that is, the ratio of the cross-sectional area of the first receiving groove 2 to the cross-sectional area of the second receiving groove 3 is 1:0.166.
  • the ratio of the cross-sectional area of the first receiving groove 2 to the cross-sectional area of the second receiving groove 3 is less than 1:0.05, the second receiving groove 3 will not be able to meet the exhaust requirements of the formation in the subsequent processing of the battery 100, and the gas in the formation process will cause irreversible damage to the metal shell 1. If the ratio of the cross-sectional area of the first receiving groove 2 to the cross-sectional area of the second receiving groove 3 exceeds 1:0.5, the volume of the entire metal shell 1 increases, especially the proportion of the second receiving groove 3 is too large, which will affect the overall size of the battery 100 after the metal shell 1 is processed, which is not conducive to the arrangement of the battery 100 module and the battery 100 pack.
  • the depth of the first receiving groove 2 is 5-40mm, and the depth of the first receiving groove 2 is determined by the subsequent capacity requirement of the battery 100.
  • the depth of the first receiving groove 2 is affected by the thickness of the substrate 101. In order to ensure the structural strength of the first receiving groove 2, it is preferred that when the thickness of the substrate 101 is 0.2mm, the depth of the first receiving groove 2 is controlled between 10-14mm, and preferably a second receiving groove 3 is formed, and the air bag is set at 12.1mm.
  • the depth of the second receiving groove 3 is 2-20mm, and the depth of the second receiving groove 3 is related to the capacity of the battery 100 in the first receiving groove 2.
  • the depth of the second receiving groove 3 is affected by the thickness of the substrate 101.
  • the thickness of the substrate 101 is 0.2mm, preferably 7mm.
  • the first receiving groove 2 and the second receiving groove 3 have a smaller depth and a smaller number of stamping times, thereby reducing production costs.
  • the side wall of the second receiving groove 3 close to the first receiving groove 2 is inclined, so that the inclined side wall gradually approaches the first receiving groove 2 along the direction from the groove bottom of the second receiving groove 3 to the first shell 102 .
  • the spacing between the first receiving groove 2 and the second receiving groove 3 is X
  • the depth of the first receiving groove 2 is H
  • X is less than 0.5H, the stamping quality of the first receiving groove 2 and the second receiving groove 3 is reduced, and the structural strength of the two grooves cannot be guaranteed to meet the subsequent processing requirements of the battery 100.
  • the distance X between the first receiving groove 2 and the second receiving groove 3 is too large, that is, exceeds 3H, the external overall size of the subsequent battery 100 processing will be too large, which is not conducive to the overall structural layout of the battery 100.
  • the depth of the first receiving groove 2 may be equal to the depth of the second receiving groove 3 , as long as the volume of the first receiving groove 2 is greater than the volume of the second receiving groove 3 .
  • the thickness of the substrate 101 is 0.1-0.4 mm. Optimally, the thickness of the substrate 101 is 0.2 mm. Compared with the thickness of the metal shell 1 of the prior art, which is mostly 0.4-0.6 mm; the thickness of the blade battery 100 is 0.3 mm, the shell thickness in this embodiment has the advantages of ultra-thinness, light weight, low cost, and increased capacity of the battery 100 per unit volume.
  • a battery 100 according to a second embodiment of the present invention comprises an inner insulating film 14 , an outer insulating film 15 , a pole core 9 , a positive electrode cover plate, a negative electrode cover plate and a metal shell 1 according to any of the above embodiments, wherein the inner insulating film 14 is respectively arranged on the opposite sides of the first shell 102 and the second shell 103 , and the outer insulating film 15 is arranged on the outer surfaces of the first shell 102 and the second shell 103 .
  • the pole core 9 is placed in the first receiving groove 2 , the positive electrode cover plate is installed in one of the first groove 4 and the second groove 5 , and the negative electrode cover plate is installed in the other of the first groove 4 and the second groove 5 .
  • the three edges of the metal shell 1 except the edge where the first straight line 6 is located are all welded.
  • the first cutting piece 81 and the second cutting piece 82 are cut off after the welding injection edge 7.
  • an embodiment of the present application provides a battery 100, including a pole core 9, a cover plate assembly 13 and a metal shell 1, wherein the pole core 9 is connected to the cover plate assembly 13, the metal shell 1 includes a accommodating portion and a storage portion 10, the accommodating portion is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is used to accommodate the pole core 9, the first accommodating cavity is formed by the first shell 102 closing the first accommodating groove 2, the second accommodating cavity is arranged at one end of the first accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity, the second accommodating cavity is used to accommodate the cover plate assembly 13, the storage portion 10 includes an air bag for storing electrolyte or gas and an injection edge 7 for injection, the air bag is formed by the first shell 102 closing the second accommodating groove 3 , the air bag is arranged on one side of the first accommodating cavity, and is communicated with the first accommodating cavity; the injection edge 7 is provided on the side of the air bag away from the first accommodating cavity.
  • the battery 100 provided in the present application includes two cover plate assemblies 13 , one of which is a positive electrode cover plate assembly 13 .
  • the other is a negative electrode cover plate assembly 13.
  • the positive electrode cover plate assembly 13 is welded to the positive electrode ear of the pole core 9, and the negative electrode cover plate assembly 13 is welded to the negative electrode ear of the pole core 9.
  • the first direction and the second direction of the present application are, for example, as shown in FIG. 5 , the first direction is the x direction, the second direction is the y direction, and the first direction is perpendicular to the second direction.
  • the pole core 9 is connected to the cover plate assembly 13, preferably the pole core 9 and the cover plate assembly 13 are connected by welding, and the welding method can be laser welding.
  • a second accommodating cavity is provided at each end of the first accommodating cavity, and each second accommodating cavity accommodates a cover plate assembly 13.
  • the first accommodating cavity in the metal shell 1 is used to accommodate the pole core 9, and the second accommodating cavity is connected to the first accommodating cavity, so that the second accommodating cavity can be used to accommodate the cover plate assembly 13.
  • the storage part 10 includes an air bag and a liquid injection edge 7.
  • the air bag is provided at one end of the first accommodating cavity in the second direction, and the liquid injection edge 7 is provided on the side of the air bag away from the first accommodating cavity.
  • the air bag is used to store electrolyte or gas. As shown in Figures 5-7, the air bag is mainly used to store electrolyte or gas.
  • the gas here refers to the gas generated during the charging and discharging process of the battery 100.
  • the electrolyte is stored because the battery 100 provided in this application is injected once, and the pole core 9 cannot completely absorb the electrolyte. Excess electrolyte may be stored in the air bag.
  • the electrolyte in the air bag can flow into the first accommodating cavity, so that the electrolyte can be absorbed by the pole core 9.
  • the injection edge 7 is an open end before the battery 100 is sealed, and except for the shell at the open end which is not sealed, the other two sides of the battery 100 have been sealed and welded.
  • the open end is directly opened, the injection end in the injection device is aligned with the open end, and the electrolyte is injected into the battery 100 through the open end. Injecting the electrolyte through the open end can make the electrolyte quickly infiltrate the pole core 9, thereby improving the infiltration efficiency of the electrolyte.
  • the open end is sealed and welded to form the injection edge 7.
  • the sealing method can be laser welding or resistance welding.
  • the battery 100 provided in the present application has the following main effects: 1) Compared with the injection through the injection hole, the battery 100 provided in the present application has an injection edge 7 for injection, a large injection port, which speeds up the injection speed, shortens the injection process time, and improves production efficiency. 2) Compared with the existing battery 100, the battery 100 provided in the present application is provided with an air bag, which directly performs one injection, and the excess electrolyte is directly stored in the air bag, and multiple injections are not required, which simplifies the injection steps; at the same time, in the subsequent infiltration process, the electrolyte in the air bag can gradually flow into the first accommodating cavity so that the electrolyte in the air bag can be completely infiltrated into the pole core 9.
  • the air bag can collect the gas generated by the battery 100 during the formation process, and there is no need for a continuous vacuum exhaust process during the formation process, which saves costs.
  • the battery 100 provided in the present application has an air bag for storing electrolyte and gas generated by the formation of the battery 100, so as to avoid the problem of battery cell bloating or poor appearance caused by insufficient storage unit 10; after the formation, the air bag is directly flattened to discharge the gas from the battery 100, without the need for vacuum exhaust, thereby reducing the extraction of electrolyte.
  • the metal shell 1 includes a folded edge and two shell bodies, one of which is provided with a first receiving groove 2, a second receiving groove 3 and a first groove 4, and the first groove 4 is provided at the end of the first receiving groove 2 in the first direction, and the first receiving groove 2 is connected to the first groove 4; in the second direction, the first receiving groove 2 and the second receiving groove 3 are spaced apart, and the first direction is perpendicular to the second direction;
  • the two shell bodies are folded along the folded edge, the first accommodating groove 2 of one shell body and the other shell body form the first accommodating cavity, the first groove 4 of one shell body and the other shell body form the second accommodating cavity, and the second accommodating groove 3 of one shell body and the other shell body form the air bag.
  • the two shell bodies are defined as a first shell 102 and a second shell 103, and the first shell 102 is provided with a first receiving groove 2, a second receiving groove 3, and a first groove 4, wherein the first receiving groove 2, the second receiving groove 3, and the first groove 4 are preferably formed by stamping.
  • the first receiving groove 2 is formed on the first shell 102, and the second shell 103 is not punched.
  • the present application provides a battery 100 with reduced processes and shortened process time.
  • the first groove 4, the first receiving groove 2, and the second receiving groove 3 are all stamped on the same shell body.
  • the material of the metal shell 1 is preferably aluminum shell material, with uniform wall thickness and consistent overall structural strength. At the same time, the structural strength of the four corners can also be ensured to be consistent. Compared with the existing soft-pack aluminum-plastic film composite film material, the battery 100 provided by the present application has a better heat dissipation effect when the shell is made of metal material.
  • the material of the metal housing 1 includes aluminum, aluminum alloy, etc.
  • the thickness of the metal shell 1 is 0.2 mm.
  • the second receiving groove 3 and the second shell 103 form an air bag for storing electrolyte and gas generated by the battery 100.
  • the first groove 4 and the second shell 103 form a second receiving cavity for receiving the cover plate assembly 13.
  • the volume of the first accommodating cavity is V1
  • the volume of the air bag is V2
  • the range of V1:V2 is 1:(0.05 ⁇ 0.5).
  • the air bag in the battery 100 is used as a liquid storage bag in the liquid injection process of the battery 100 processing, and can be used to temporarily store the electrolyte required for the infiltration of the pole core 9 in the first accommodating cavity. During the infiltration process of the pole core 9, the electrolyte temporarily stored in the air bag will gradually penetrate into the first accommodating cavity.
  • the air bag is used as an exhaust bag in the formation process of the battery 100 processing, and can be used to temporarily store the gas generated by the formation of the battery 100. After the formation process is completed, the air bag can be separated from the first accommodating cavity by cutting, or the air bag can be flattened by exhausting gas, so that the battery 100 forms an extension 8 at the air bag. Therefore, under the premise of meeting the processing requirements of the pole core 9 in the first accommodating cavity, the volume of the air bag is as small as possible.
  • the height of the air bag is smaller than the height of the first accommodating cavity, and the volume V2 of the air bag is limited to be smaller than the volume V1 of the first accommodating cavity.
  • the range of V1:V2 is limited to 1:(0.05-0.5), which can not increase the overall thickness of the battery 100, reduce the occupied volume of the air bag, and also have a sufficient volume of the air bag to store the gas generated by the formation of the battery 100, so as to avoid or reduce the occurrence of bloating of the battery 100.
  • the exhaust volume of the pole core 9 will also vary greatly. Therefore, under the premise of the same volume V1 of the first accommodating cavity, according to different processing techniques, the volume V2 of the air bag can be adjusted so that the volume V2 of the air bag can meet the processing requirements of the battery 100.
  • the range of V1:V2 is 1:(0.1-0.4). More preferably, the range of V1:V2 is 1:(0.1-0.3); More preferably, the range of V1:V2 is 1:(0.1-0.2).
  • the ratio of V1:V2 is 1:0.166.
  • the volume V1 of the first accommodating chamber is related to the volume V2 of the airbag. The larger the volume V1 of the first accommodating chamber, the larger the volume V2 of the airbag.
  • the volume V1 of the first accommodating chamber is 6 times the volume V2 of the airbag, which can meet the exhaust and injection requirements of the pole core 9 in the first accommodating chamber during the processing, that is, the ratio of the volume V1 of the first accommodating chamber to the volume V2 of the airbag is 1:0.166.
  • the distance between the side surface of the second accommodating groove 3 close to the first accommodating groove 2 and the other shell body gradually increases.
  • the side surface of the second receiving groove 3 close to the first receiving groove 2 is inclined, and the inclination direction is from the bottom of the second receiving groove 3 to the direction close to the second shell 103, and the distance between the side surface of the first receiving groove 2 and the second shell 103 gradually increases.
  • the second receiving groove 3 is inclined on the side close to the first receiving groove 2, so as to facilitate the electrolyte to flow into the first receiving cavity along the inclined side surface; at the same time, when the battery 100 is exhausted after being formed, The gas in the air bag is discharged along the inclined side surface without the need for vacuum exhaust, thereby reducing the amount of electrolyte being drawn out.
  • the length of the first receiving groove 2 is L1
  • the length of the second receiving groove 3 is L2, L2 ⁇ L1
  • the range of L2:L1 is (0.1 ⁇ 1.0):1.
  • the length L1 of the first receiving groove 2 is greater than or equal to the length L2 of the second receiving groove 3, and the range of L2:L1 is (0.1 ⁇ 1.0):1, that is, the length of the second receiving groove 3 is less than the length of the pole core 9, which does not increase the overall length of the battery 100 and reduces the volume occupied by the airbag.
  • the ratio of L2:L1 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.0, etc., as long as the ratio of L2:L1 is within (0.1-1.0): 1.
  • the cover plate assembly 13 includes a first welding surface 134 and a second welding surface 135 , wherein the first welding surface 134 is a plane 1351 structure, and the first welding surface 134 is welded to another shell body;
  • the second welding surface 135 includes two arc surfaces 1353, a plane 1351 and two inclined surfaces 1352, and the two inclined surfaces 1352 are connected to two ends of the plane 1351 through the arc surfaces 1353 respectively;
  • the second welding surface 135 is welded to the first groove 4 of a shell body.
  • the first welding surface 134 is set as a plane 1351 structure to facilitate welding the first welding surface 134 and the second shell 103, reduce welding difficulty, and improve welding efficiency; the welding method here includes laser welding or resistance welding, and laser welding is preferred.
  • the second welding surface 135 is composed of an arc surface 1353, a plane 1351 and an inclined surface 1352. This is because the cover plate assembly 13 has a certain thickness, so a first groove 4 is set on the first shell 102 to accommodate the cover plate assembly 13 with a certain thickness; the shape of the first groove 4 is the same as the shape of the second welding surface 135 in the cover plate assembly 13, so as to facilitate the accommodation of the cover plate assembly 13.
  • the second welding surface 135 includes a plane 1351, and an arc surface 1353 is set at each end of the plane 1351.
  • the arc surface 1353 plays a transition role.
  • each arc surface 1353 away from the plane 1351 is connected to an inclined surface 1352, and the inclined surface 1352 plays a role in facilitating the sealing welding of the second shell 103 and the first shell 102. If there is no transition of the inclined surface 1352, there will be gaps in the welding between the cover plate assembly 13 and the first shell 102 and the second shell 103, which affects the sealing of the battery 100.
  • the cover assembly 13 includes a lead-out piece 130, an insulating member 132 and a cover body 133, the cover body 133 is provided with a first mounting hole 136, the insulating member 132 is inserted into the first mounting hole 136 and extends out of the cover body 133, the insulating member 132 is provided with a second mounting hole 1321, the lead-out piece 130 is provided in the second mounting hole 1321 and extends out of the insulating member 132, and the length of the lead-out piece 130 extending out of the insulating member 132 is greater than the length of the insulating member 132 extending out of the cover body 133.
  • the insulating member 132 extends out of the cover body 133 to provide insulation to prevent short circuit of the battery 100.
  • the lead-out piece 130 extends out of the insulating member 132, and the extension 8 at one end is welded to the pole ear 91 or the connecting piece of the pole core 9, and the extension 8 at the other end is used to electrically connect to an external circuit.
  • the length of the lead-out piece 130 extending out of the insulating member 132 is greater than the length of the insulating member 132 extending out of the cover body 133, which is 6-7 mm; one end of the lead-out piece 130 is conveniently welded to the pole ear 91 or the connecting piece of the pole core 9, and the other end of the lead-out piece 130 is used to be electrically connected to the external circuit.
  • the cover assembly 13 in this embodiment has no injection hole, and the pole is the lead-out piece 130, which can be as thin as 0.5 mm. Therefore, the thickness of the cover assembly 13 can be extremely thin, and the corresponding overall thickness of the battery 100 can also be extremely thin (the thinnest can be 6 mm thick).
  • the extension direction of the airbag in the second direction, is parallel to the extension direction of the first accommodating cavity; or in the second direction, the extension direction of the airbag is perpendicular to the extension direction of the first accommodating cavity.
  • FIG5-8 One arrangement of the airbag and the first accommodating cavity is shown in FIG5-8 .
  • the airbag and the first accommodating cavity are arranged side by side, and the extension direction of the airbag is arranged parallel to the extension direction of the first accommodating cavity.
  • FIG8 Another arrangement of the air bag and the first accommodating cavity is shown in FIG8 , where the extending direction of the air bag is perpendicular to the extending direction of the first accommodating cavity.
  • the extension direction of the air bag and the extension direction of the first accommodating cavity have an angle, and the angle can be in the range of 0-180°.
  • the angle can be in the range of 0-180°.
  • an angle of 0 or 180° it is a parallel setting, and an angle of 90° is a vertical setting.
  • the angle is an acute angle, the inclined surface 1352 is more conducive to the diversion of the electrolyte in the air bag.
  • an inner insulating film 14 is provided on the inner surface of the metal shell 1 facing the pole core 9, the inner insulating film 14 is provided between the metal shell 1 and the pole core 9, and the inner insulating film 14 covers the pole core 9;
  • An outer insulating film 15 is provided on the outer surface of the metal shell 1 facing away from the pole core 9 , and the outer insulating film 15 covers the outer circumference of the metal shell 1 .
  • the inner insulating film 14 covers the pole core 9
  • the outer insulating film 15 covers the outer periphery of the metal shell 1 , both of which prevent the battery 100 from short circuiting.
  • the structure of the inner insulating film 14 is the same as that of the metal shell 1.
  • the structure of the inner insulating film 14 may also be different from that of the metal shell 1, as long as the inner insulating film 14 is coated on the periphery of the pole core 9 to prevent the battery 100 from short-circuiting.
  • the structure of the outer insulating film 15 is preferably the same as that of the metal shell 1, so that the outer insulating film 15 can be completely coated on the periphery of the metal shell 1 to prevent the battery 100 from short-circuiting.
  • the side surface of the first accommodating groove 2 close to the second accommodating groove 3 is a curved surface 1353
  • the side surface of the second accommodating groove 3 close to the first accommodating groove 2 is a curved surface 1353 .
  • the first receiving groove 2 and the second receiving groove 3 are both formed by punching.
  • the side of the first receiving groove 2 close to the second receiving groove 3 is punched into an arc surface 1353, and the side of the second receiving groove 3 close to the first receiving groove 2 is also an arc surface 1353, which can reduce material stress and effectively improve the punching efficiency of the first receiving groove 2 and the second receiving groove 3.
  • the distance between the first receiving groove 2 and the second receiving groove 3 is X
  • the depth of the first receiving groove 2 is H
  • H and X satisfy the following relationship: 0.5H ⁇ X ⁇ 3H.
  • the distance X between the first receiving groove 2 and the second receiving groove 3 and the depth H of the first receiving groove 2 satisfy the following relationship: 0.5H ⁇ X ⁇ 3H, which can effectively improve the efficiency of punching to form the first receiving groove 2 and the second receiving groove 3.
  • first accommodating groove 2 is close to the first side surface of the second accommodating groove 3
  • second accommodating groove 3 is close to the second side surface of the first accommodating groove 2
  • first side surface and the second side surface are both arc surfaces 1353.
  • the distance X between the first accommodating groove 2 and the second accommodating groove 3 defined in this embodiment is the distance between the side of the first side surface opening toward the first accommodating groove 2 and the side of the second side surface opening toward the second accommodating groove 3.
  • H and X satisfy the following relationship: 1.0H ⁇ X ⁇ 2.5H.
  • an extension portion 8 is further provided at one end of the injection edge 7 away from the air bag, and the cross section of the extension portion 8 is a polygon.
  • the extension part 8 can also be used to store gas.
  • gas is stored in the extension part 8.
  • the extension part 8 can be directly cut to release the gas in the air bag and the extension part 8.
  • the cut part can then be welded to seal the battery 100.
  • the welding method can be laser welding or resistance welding, preferably resistance welding.
  • the extension part 8 can be cut off, and the cross section of the injection edge 7 is a straight line.
  • the trimmed part of the metal shell 1 can be directly welded by resistance welding or laser welding.
  • the cross section of the extension portion 8 is a polygon, the number of sides of the polygon is n, n ⁇ 3, such as a square, a rectangle, a pentagon, etc., and the cross section is preferably a square or a rectangle.
  • the cross-section of the injection edge 7 is linear or L-shaped.
  • the cross section of the injection edge 7 is a straight line, and if the extension part 8 is not cut off, the cross section of the injection edge 7 is an L-shape. Whether to cut off the extension part 8 can be selected according to actual needs, and this application does not limit it.
  • the gas generated after the battery 100 is formed can be discharged from the battery 100 by flattening the air bag. Because there is electrolyte in the air bag, if the air bag is directly cut off and the metal shell 1 is sealed and welded, the presence of electrolyte will affect the welding of the shell. Therefore, the battery 100 provided in this application retains the air bag.
  • the battery 100 with the air bag can improve the welding efficiency of the two bending surfaces and improve production efficiency. It can be seen from Figures 3 and 4 that Figure 3 is a structural diagram without flattening the air bag, and Figure 4 is a structural diagram of the air bag directly flattened after the gas is discharged. It can be understood that whether the air bag is flattened or not can be selected according to the actual situation, and this application does not limit it.
  • an embodiment of the present invention provides a method for manufacturing a battery 100, referring to FIGS. 12-17, comprising:
  • step S1 the lead-out piece 130 of the cover plate assembly 13 is first connected to the pole ear 91 of the pole core 9 of the battery 100 to form an integral structure, which is convenient for installation in the metal shell 1 and improves the installation efficiency.
  • step S2 the battery 100 pole core 9 is then placed in the first receiving groove 2 of the metal shell 1, and the cover plate assembly 13 is placed on the cover plate mounting position 11 connected to the first receiving groove 2, so that it is convenient to assemble the cover plate assembly 13, the battery 100 pole core 9 and the metal shell 1 together, thereby improving production efficiency.
  • the metal shell 1 includes a first shell 102 and a second shell 103; the metal shell 1 is bent at the junction of the first shell 102 and the second shell 103, the first shell 102 is used as the bottom shell, the second shell 103 is used as the top shell, and the first shell 102 is provided with a first receiving groove 2 and a second receiving groove 3, which cooperate to form an empty cavity in the first receiving groove 2 of the metal shell 1, and the second receiving groove 3 of the metal shell 1 forms an air bag, and the battery 100 pole core 9 is installed in the first receiving cavity for later injection of electrolyte; the air bag is connected to the first receiving cavity, and is used to guide liquid to the first receiving cavity in the early stage, and to exhaust the first receiving cavity in the later stage.
  • the periphery of the first receiving cavity and the air bag The periphery is the hot melt area for later welding; the width of the hot melt area is 2mm.
  • step S4 the two first side surfaces of the metal shell 1 are welded to form a liquid storage chamber in the first accommodation cavity, and a liquid injection channel is formed in the air bag, and electrolyte is injected into the first accommodation cavity from the opening side of the air bag.
  • the air bag cannot be used to store electrolyte.
  • step S5 after the electrolyte is injected, the side opposite to the first side of the metal shell 1, i.e., the opening side of the air bag, is welded, and then the first receiving cavity is formed.
  • the electrolyte needs to be cleaned at the welding point to avoid poor welding and leakage of the battery 100 structure.
  • step S6 after the formation is completed, the air bag is cut off and the first containing chamber is evacuated, so that the gas in the first containing chamber can be quickly discharged without flattening the air bag, thereby reducing the risk of rupture of the metal shell 1.
  • step S7 when the exhaust meets the requirement, the first receiving cavity is sealed to complete the manufacture of the battery 100 structure.
  • the electrolyte needs to be cleaned at the sealing part to avoid leakage of the battery 100 structure due to loose sealing.
  • the battery 100 pole core 9 is slowly pushed in from a side opening of the metal shell 1, which has low installation efficiency and a risk of damage to the battery 100 pole core 9; and zero tolerance for burrs at the opening of the metal shell 1 leads to high manufacturing costs.
  • the battery 100 pole core 9 is first placed in the metal shell 1, and then the metal shell 1 is bent to form a first accommodating cavity and an air bag, and then the two first side surfaces of the metal shell 1 are welded to form a liquid storage chamber in the first accommodating cavity and a liquid injection channel in the air bag, and electrolyte is injected into the first accommodating cavity from the opening side of the air bag, and the side opposite to the first side of the metal shell 1, i.e., the opening side of the air bag, is welded, and then the first accommodating cavity is chemically formed, and then the air bag is cut off, and the first accommodating cavity is evacuated, and finally the first accommodating cavity is sealed to complete the manufacture of the battery 100 structure; compared with the existing battery 100 manufacturing method, the installation of the battery 100 pole core 9 is more convenient, and the battery 100 pole core 9 is prevented from being damaged.
  • the metal shell 1 is bent into the first accommodating cavity, which can reduce the process requirements and thus reduce the manufacturing cost.
  • the volume of the air bag is designed to be 65ml, the gas production of 65.00mL is greater than the designed volume of the air bag, and two exhausts may be required during the formation process; the gas production during the cycle is (20%) 13.00mL; the designed volume of the air bag can meet the requirements of the cycle gas production; wherein the welding method generally adopts any one of resistance welding, EPMT and ultrasonic roll welding.
  • the battery 100 pole core 9 is directly placed in the metal shell 1 and can be assembled once, thereby avoiding damage to the battery 100 pole core 9 during the assembly process.
  • the metal shell 1 used in the method for manufacturing the battery 100 mentioned in the present invention has a first receiving groove 2 and a second receiving groove 3.
  • the second receiving groove 3 is used to effectively solve the problems of insufficient liquid injection in the liquid injection process and exhaust in the formation process during the processing of the battery 100, thereby simplifying the cover plate structure of the hard shell battery 100, so that the structure of the cover plate assembly 13 is simpler.
  • the cover plate assembly 13 is not only simple in structure and easy to process, but also meets the basic requirements of the battery 100 in assembly and sealing, and can realize an extremely thin design of the cover plate assembly 13.
  • the overall thickness of the cover plate assembly 13 can be as thin as 6 mm.
  • the cover assembly 13 includes a cover body 133 connected to the metal shell 1; the outer ring surface of the cover body 1 has a first welding surface 134 and a second welding surface 135 connected end to end, the first welding surface 134 includes a first plane, the second welding surface 135 includes two first inclined surfaces and a second inclined surface respectively connected to the first welding surface 134, and a second plane connecting the first inclined surface and the second inclined surface, the first plane and the second plane are arranged parallel to each other, and a first mounting hole 136 is provided on the cover body 133, and the first mounting hole 136 is located between the first plane and the second plane.
  • the cover plate assembly 13 includes a cover plate body 133 connected to the metal shell 1.
  • the cover plate body 133 is made of 3003 aluminum and serves as a fixed seat for being installed on the cover plate mounting position 11 of the metal shell 1.
  • the cover plate body 133 is provided with a first mounting hole 136 for assembling the structure connected to the battery 100 pole core 9 in the cover plate assembly 13.
  • the outer annular surface of the cover plate body 1 has a first welding surface 134 and a second welding surface 135 connected end to end.
  • the first welding surface 134 includes a first plane
  • the second welding surface 135 includes two first inclined surfaces and a second inclined surface respectively connected to the first welding surface 134, and a second plane connecting the first inclined surface and the second inclined surface.
  • the first plane and the second plane are arranged parallel to each other, so that it is convenient to weld the cover plate body 133 to the metal shell 1; the first inclined surface, the second inclined surface and the second plane cooperate to form a mounting surface, which matches the cover plate mounting position 11 of the metal shell 1, so as to facilitate the installation of the cover plate body 133 on the metal shell 1; the cover plate body A first mounting hole 136 is provided on the cover body 133 , and the first mounting hole 136 is located between the first plane and the second plane, so as to ensure that the structure connected to the pole core 9 of the battery 100 is mounted on the cover body 133 .
  • the cover plate assembly 13 also includes a lead-out piece 130 disposed in the cover plate body 133;
  • the lead-out piece 130 includes a main body portion in a rectangular sheet-like structure and an annular groove surrounding the main body portion, so that the lead-out piece 130 forms a first end and a second end on both sides of the annular groove; the first end of the lead-out piece 130 is connected to the pole ear 91 of the pole core 9 of the battery 100 in the metal shell 1, and the second end of the lead-out piece 130 is used to connect to an external circuit.
  • the cover plate assembly 13 also includes a lead-out piece 130 arranged in the cover plate body 133; the lead-out piece 130 is made of 1060 aluminum, and the lead-out piece 130 is assembled in the cover plate body 133; the lead-out piece 130 includes a main body portion in a rectangular sheet-like structure and an annular groove surrounding the main body portion, so that the lead-out piece 130 forms a first end and a second end on both sides of the annular groove; the first end of the lead-out piece 130 is connected to the pole ear 91 of the battery 100 pole core 9 in the metal shell 1, and the second end of the lead-out piece 130 is used to connect to an external circuit to achieve electrical connection between the pole ear 91 of the battery 100 pole core 9 and the external circuit.
  • the cover assembly 13 further includes an insulating member 132 disposed between the cover body 133 and the lead-out piece 130 ;
  • the manufacturing method of the battery 100 further includes:
  • the cover body 133 and the lead-out piece 130 are subjected to injection molding operation, so that an insulating member 132 is formed between the cover body 133 and the lead-out piece 130 , and the insulating member 132 fixes the cover body 133 and the lead-out piece 130 together.
  • the plate assembly further includes an insulating member 132 disposed between the cover plate body 133 and the lead-out piece 130.
  • the cover plate body 133 and the lead-out piece 130 are injection molded so that the insulating member 132 is formed between the cover plate body 133 and the lead-out piece 130.
  • the insulating member 132 fixes the cover plate body 133 and the lead-out piece 130 together.
  • the insulating member 132 is made of PPS-SGX-120 and has an insulating protection function.
  • the insulating member 132 is assembled in the first mounting hole 136, and a second mounting hole 1321 is provided on the insulating member 132 for assembling the lead-out piece 130.
  • the explosion-proof valve and the injection hole are cancelled, and the thickness of the cover plate body 133, the insulating member 132 and the lead-out sheet 130 can be adjusted according to actual needs.
  • the overall thickness can be greatly reduced, and the overall thickness can be made into an extremely thin battery 100.
  • the welding between the cover plate body 133 and the metal shell 1 is easier to achieve.
  • the insulating member 132 includes an insulating body 1322 and two limiting portions 1323. The two limiting portions 1323 extend from both ends of the insulating body 1322.
  • the insulating body 1322 is assembled in the first mounting hole 136.
  • the two limiting portions 1323 are respectively in contact with the two side surfaces of the cover plate body 133 along the axial direction of the first mounting hole 136, which can limit the cover plate body 133 and ensure that the cover plate body 133 is firmly installed on the insulating member 132.
  • the insulating body 1322 is provided with a second mounting hole 1321, the axial direction of the second mounting hole 1321 is the same as the axial direction of the first mounting hole 136, and the second mounting hole 1321 is used to install the lead-out piece 130.
  • the insulating member 132 also includes a clamping portion 1324 extending from the limiting portion 1323, and the clamping portion 1324 is arranged parallel to and opposite to the insulating body 1322; a clamping groove 137 is provided on the cover body 133, and the clamping portion 1324 matches the clamping groove 137, providing a limit fixation for the installation of the cover body 133, and ensuring that the connection between the cover body 133 and the insulating member 132 is more stable and reliable.
  • step S1 that is, connecting the cap plate assembly 13 to the pole ear 91 of the pole core 9 of the battery 100, includes:
  • the pole ear 91 of the battery 100 pole core 9 is first pre-welded. After the pole ear 91 is pre-welded, it deviates from the center by 4.1 mm in the thickness direction, and then the pole ear 91 is cut with a cutting chamfer of 5 mm*8 mm to facilitate the connection between the pole ear 91 of the battery 100 pole core 9 and the lead-out piece 130 of the cover assembly 13. This arrangement can ensure that the top of the battery 100 pole core 9 and the cover assembly 13 remain on the same horizontal plane, which is convenient for installation in the metal shell 1.
  • step S12 the first end of the lead-out piece 130 of the cover plate assembly 13 is welded to the pole ear 91 of the pole core 9 of the battery 100, and glue is applied at the welding point, which can make the connection between the pole ear 91 of the pole core 9 of the battery 100 and the lead-out piece 130 of the cover plate assembly 13 more stable.
  • step S13 the second end of the lead-out piece 130 of the cover assembly 13 is extended through the cover body 133 to the outside of the metal shell 1 for connecting to an external circuit to achieve electrical connection between the pole ear 91 of the pole core 9 of the battery 100 and the external circuit.
  • the metal shell 1 includes a first shell 102 and a second shell 103 extending from a first side of the first shell 102; the first shell 102 is provided with a first accommodating groove 2, a second accommodating groove 3 and two cover plate mounting positions 11 connected to the first accommodating groove 2; the two cover plate mounting positions 11 are respectively arranged on two first side surfaces opposite to each other on the first shell 102, and the first side surface is a side surface perpendicular to the first side surface; the first shell 102 and the second shell 103 are connected, and the two cooperate to form a first accommodating cavity and an air bag.
  • the metal shell 1 includes a first shell 102 and a second shell 103 bent and extended from the first side of the first shell 102; the first shell 102 is provided with a first accommodating groove 2, a second accommodating groove 3 and two cover mounting positions 11 connected to the first accommodating groove 2; the two cover mounting positions 11 are respectively arranged on two first side surfaces opposite to each other on the first shell 102, and the first side surface is a side surface perpendicular to the first side surface.
  • the first shell 102 and the second shell 103 are connected, and the two cooperate to form a first accommodating cavity and an air bag.
  • the first accommodating cavity is used to place the battery 100 pole core 9, and a cover assembly 13 is assembled in each cover mounting position 11. This arrangement facilitates the assembly of the battery 100 structure and improves production efficiency.
  • the first receiving groove 2, the second receiving groove 3 and the two cover plate mounting positions 11 connected with the first receiving groove 2 are integrated in the first shell 102, and then the second shell 103 is bent to connect the second shell 103 with the first shell 102, so that the first cavity 421 cooperates with the second shell 103 to form a first receiving cavity, and the second cavity 422 cooperates with the second shell 103 to form an air bag, and the battery 100 pole core 9 is installed in the first receiving cavity for later injection of electrolyte; the air bag is connected with the first receiving cavity, and is used to guide liquid to the first receiving cavity in the early stage and to exhaust the first receiving cavity in the later stage, which provides convenience for manufacturing the battery 100 structure.
  • the two first side surfaces of the welded metal shell 1 include: the front welded weld is the connection between the second welding surface 135 of the cover plate body 133 on the first side and the cover plate mounting position 11 of the first shell 102, and the back welded weld is the connection between the first welding surface 134 of the cover plate body 133 on the first side and the second shell 103 and the overlapping part of the first shell 102 and the second shell 103.
  • the cover assembly 13 is installed on the cover mounting position 11 of the metal shell 1.
  • the cover assembly 13 is located between the two bent parts of the metal shell 1. Therefore, during welding, the weld of the front welding is the connection between the second welding surface 135 of the cover body 133 on the first side and the cover mounting position 11 of the first shell 102, and the weld of the back welding is the connection between the first welding surface 134 of the cover body 133 on the first side and the second shell 103 and the overlapping part of the first shell 102 and the second shell 103. In this way, the sealing of the connection between the metal shell 1 and the cover assembly 13 can be ensured to avoid leakage during liquid injection.
  • the method for manufacturing the battery 100 before sealing the first receiving cavity, the method for manufacturing the battery 100 further includes:
  • Heat dissipation fins 16 are reserved on opposite sides of the first straight line 6 of the metal housing 1 .
  • a heat dissipation fin 16 can be reserved on the opposite side of the first straight line 6 of the metal shell 1, so as to facilitate the heat dissipation of the manufactured battery 100 structure in the later stage and improve the safety of the device.
  • the portion of the metal shell 1 retained on the side of the first accommodating cavity is the heat dissipation fin 16 of the battery 100 structure.
  • the height of the heat dissipation fin 16 is not limited by the size of the air bag and can be freely designed.
  • the heat dissipation fin 16 can be set separately on the first shell 102, or on the second shell 103, or on the first shell 102 and the second shell 103, located on the side surface opposite to the first side, which can effectively dissipate the heat of the first accommodating cavity and ensure the safety of the device.
  • sealing the first accommodating cavity includes any one of direct welding sealing, edge welding sealing and double rolling sealing.
  • sealing the first accommodating cavity includes any one of direct welding sealing method, edge welding sealing method and double roll sealing method;
  • the direct welding sealing method is to use laser welding to directly weld two welds on the opposite sides of the first straight line 6 of the metal shell 1, so as to achieve the sealing of the first accommodating cavity and ensure the sealing effect;
  • the edge welding sealing method is to first wrap a layer of edge on the opposite side of the first straight line 6 of the metal shell 1, and then use laser welding to weld the edge on the opposite side of the first straight line 6 of the metal shell 1, so as to achieve the sealing of the first accommodating cavity and ensure the sealing effect;
  • the double roll sealing method is to wrap the first straight line 6 of the metal shell 1 6 is folded twice on the opposite sides, so as to seal the first accommodating cavity and ensure the sealing effect.
  • the inner insulating film 14 is pre-arranged on the inner wall of the entire first receiving cavity, which can provide effective insulation between the battery 100 pole core 9 and the inner wall of the first receiving cavity, so that the internal structure of the battery 100 has a good insulation effect.
  • the outer insulating film 15 is arranged on the outside of the entire metal shell 1, which can provide insulation protection for the entire metal shell 1 and ensure the safety of the equipment.
  • the sealing method of edge welding includes: wrapping a layer of edge wrapping on the opposite sides of the first straight line 6 of the metal shell 1; welding the edge wrapping on the opposite sides of the first straight line 6 of the metal shell 1 to seal the first accommodating cavity.
  • a layer of edge is first wrapped on the opposite side of the first straight line 6 of the metal shell 1 so that the edge covers the opening of the first accommodating cavity, and then laser welding is used to weld the edge to the opposite side of the first straight line 6 of the metal shell 1, thereby sealing the first accommodating cavity and ensuring the sealing effect.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种金属壳体(1)及电池(100)、电池(100)的制备方法，由基板(101)沿第一直线(6)对折分别形成第一壳体(102)和第二壳体(103)；第一壳体(102)呈平板状；第二壳体(103)设置有间隔排布的第一容纳槽(2)和第二容纳槽(3)，第一容纳槽(2)和第二容纳槽(3)均朝向远离第一壳体(102)的方向内凹形成；第一壳体(102)的一侧表面和第二壳体(103)的一侧表面相对设置，第一壳体(102)和第二壳体(103)的边沿连接，使得第一壳体(102)封闭第一容纳槽(2)和第二容纳槽(3)，第一容纳槽(2)用于容纳极芯(9)，第二容纳槽(3)用于排气或注液。在注液化成中，第二容纳槽(3)储存电解液进入第一容纳槽(2)浸润，补充电解液，化成产生的气体从第一容纳槽(2)进入第二容纳槽(3)，无需像现有技术中需要多次堵塞注液孔的繁复操作。

Description

一种金属壳体及电池、电池的制备方法
本申请要求于2023年12月05日提交中国专利局，申请号为202311664975X、发明名称为“一种电池”，申请号为202311656305.3、发明名称为“电池的制作方法”，申请号为202311664984.9、发明名称为“金属壳体及电池”的三篇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
本发明属于电池技术领域，尤其涉及一种金属壳体及电池、电池的制备方法。
背景技术
目前，很多锂电池注液过程通常包括一次注液和二次注液，其中，一次注液后，需要进行化成，即通过高温老化房，使得电解液浸润到极片和隔膜里面，参与化学反应，实现化学能与电能的转化；二次注液是在化成后对电解液的补充过程。
由于化成过程中会产生气体，需要敞口(通常是持续负压状态)，而其它时间则需要封闭注液孔。因此，行业内通常是在一次注液后用胶塞封注液孔，化成前拨掉，化成后再次封口，二次注液前拨掉。由上可知，现有技术的注液化成工艺繁杂。
发明内容
本发明所要解决的技术问题是：针对现有技术的注液化成工艺繁杂的问题，提供一种金属壳体及电池、电池的制备方法。
为解决上述技术问题，一方面，本发明实施例提供一种金属壳体，包括由基板沿第一直线对折分别形成的第一壳体和第二壳体；所述第一壳体呈平板状；所述第二壳体设置有间隔排布的第一容纳槽和第二容纳槽，所述第一容纳槽和所述第二容纳槽均朝向远离所述第一壳体的方向凹陷；所述第一壳体的一侧表面和所述第二壳体的一侧表面相对设置，所述第一壳体和所述第二壳体的外边沿通过焊接密封固定连接，使得所述第一壳体封闭所述第一容纳槽和第二容纳槽，所述第一容纳槽用于容纳极芯；所述第一容纳槽的容积大于或等于所述第二容纳槽的容积。
第二方面，本发明实施例还提供一种电池，包括极芯、盖板组件和上述所述的金属壳体，所述极芯与所述盖板组件连接，所述金属壳体包括容纳部和存储部，所述容纳部设置有第一容纳腔和第二容纳腔，所述第一容纳腔用于容纳所述极芯，所述第一容纳腔由所述第一壳体封闭所述第一容纳槽形成，所述第二容纳腔设置于所述第一容纳腔的一端，且所述第二容纳腔与所述第一容纳腔连通，所述第二容纳腔用于容纳所述盖板组件；所述存储部包括用于存储电解液或气体的气袋和用于注液的注液边沿，所述气袋由所述第一壳体封闭所述第二容纳槽形成，所述气袋设置于所述第一容纳腔的一侧，且与所述第一容纳腔连通；所 述气袋远离所述第一容纳腔的一侧设置有封口端。
第三方面，本申请提供一种电池制作方法，包括：将盖板组件与电池极芯的极耳相接；将电池极芯放置在金属壳体的第一容纳槽，并使所述盖板组件放置在与所述第一容纳槽连通的盖板安装位上；沿第一直线弯折金属壳体，以使所述金属壳体的第一容纳槽形成第一容纳腔，所述电池壳体的第二容纳槽形成气袋；接所述金属壳体的两个第一侧面，对第一容纳腔进行注液；焊接所述金属壳体第一侧边相对的一侧面，对第一容纳腔进行化成；切去气袋，对第一容纳腔进行抽真空；对第一容纳腔进行封口。
根据本发明实施例的金属壳体及电池，在注液化成中，第二容纳槽储存电解液进入第一容纳槽浸润，补充电解液，化成产生的气体从第一容纳槽进入第二容纳槽，无需像现有技术中需要多次堵塞注液孔的繁复操作。
附图说明
图1是本申请第一实施例提供的金属壳体的制造过程中的整体示意图；
图2是本申请第一实施例提供的金属壳体的基板的展开示意图；
图3是本申请第一实施例提供的金属壳体的侧视示意图；
图4是本申请第一实施例提供的金属壳体的第二容纳槽压扁的排气示意图；
图5是本申请另一方面一实施例提供的-电池(含有延伸部)结构示意图；
图6是本申请另一方面一实施例提供的-电池(不含延伸部)结构示意图；
图7是本申请另一方面一实施例提供的-电池(不含有延伸部)爆炸示意图；
图8是本申请另一方面一实施例提供的-电池(存储部与第一容纳腔垂直)结构示意图；
图9是本申请另一方面一实施例提供的-电池截面图；
图10是图9中A部分的放大图；
图11是本申请另一方面一实施例提供的-盖板组件结构示意图；
图12是本申请中电池制作方法的流程图；
图13是本申请中电池制作方法中的第一种封口方式示意图；
图14是本申请中电池制作方法中的第二种封口方式示意图；
图15是本申请中电池制作方法中的第三种封口方式示意图；
图16是图15中A处的放大图；
图17是本申请中电池制作方法的步骤图
图18是本申请中盖板组件的爆炸图；
图19是本申请中电池壳体的轴侧图；
图20是本申请中电池极芯的轴侧图。
说明书中的附图标记如下：
100、电池；1、金属壳体；101、基板；102、第一壳体；103、第二壳体；2、第一容纳槽；3、第二容纳槽；4、第一凹槽；5、第二凹槽；6、第一直线；7、注液边沿；8、延伸部；81、第一裁剪片；82、第二裁剪片；9、极芯；91、极耳；10、存储部；11、盖板安装位；13、盖板组件；130、引出片；132、绝缘件；1321、第二安装孔；1322、绝缘主体；1323、限位部；1324、卡接部；133、盖板主体；134、第一焊接面；135、第二焊接面；1351、平面；1352、斜面；1353、弧面；136、第一安装孔；137、卡接槽； 14、内绝缘膜；15、外绝缘膜；16、散热翅片。
具体实施方式
为了使本发明所解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
第一实施例
如图1至图3所示，本发明第一实施例提供的金属壳体1，包括由基板101沿第一直线6对折分别形成第一壳体102和第二壳体103，换言之，第一壳体102和第二壳体103一体成型，第一壳体102和第二壳体103由平板状的基板101沿第一直线6折叠后人为地划分为第一壳体102和第二壳体103。第一壳体102呈平板状；第二壳体103设置有间隔排布的第一容纳槽2和第二容纳槽3，第一容纳槽2和第二容纳槽3均朝向远离第一壳体102的方向凹陷形成，本实施例中第一容纳槽2和第二容纳槽3由冲压加工而成。第一壳体102的一侧表面和第二壳体103的一侧表面相对设置，第一壳体102的边沿和第二壳体103的边沿焊接密封固定，使得第一壳体102封闭第一容纳槽2和第二容纳槽3，第一容纳槽2用于容纳极芯，第二容纳槽3用于排气或注液。
本发明的第二容纳槽3在注液工艺中，基板101临近第一直线6的两边沿焊接，第一壳体102和第二壳体103之间仅仅具有一个未被焊接的边沿，该边沿为电解液注入的边沿，将其称为注液边沿7，电解液经注液边沿7进入第二容纳槽3再流入第一容纳槽2中，第二容纳槽3为注液袋，还能在注液袋内存放电解液，在后续的浸润过程中，注液袋内的液体可以逐步浸润到极芯9中，一次完成注液且注液快，加工周期大幅缩短。
参照图3和图4，在化成工艺中，第二容纳槽3为排气袋，将极芯9在化成过程中产生的气体由第一容纳槽2排入第二容纳槽3中加以收集，最后利用外部设备压扁第二容纳槽3实现气体一次性排出，化成过程中无需持续真空排气。
在注液中，第二容纳槽3储存多余的电解液以在后期进入第一容纳槽2浸润，补充电解液。而化成产生的气体从第一容纳槽2进入并积攒于第二容纳槽3，本实施例中，在注液化成中，在第二容纳槽3内预先注入多余或者备用的电解液后，临时封闭注液边沿7，在化成结束后，再一次性的排空第二容纳槽3中的气体即可，无需像现有技术一样，多次封闭注液孔。需要注意的是，本实施例中金属壳体1并不是铝塑膜壳体，而是由金属制成的壳体，具有一定的硬度，传统的软包结构铝塑膜相对于本申请而言，由于软包铝塑膜采用热熔，不是本申请中激光焊接，软包铝塑膜密封性相对较差。且软包铝塑膜导热性差使得电池100散热差，进而软包铝塑膜容易引起电池100的使用寿命低。
在本实施例中，第一容纳槽2靠近第一直线6，第二容纳槽3位于第一容纳槽2远离第一直线6的一侧。第二壳体103上分别设置有开口朝外的第一凹槽4和第二凹槽5，第一凹槽4连通第二容纳槽3，第二凹槽5连通第二容纳槽3。第一凹槽4和第二凹槽5分别用于置入电池100的盖板组件13。
参照图2和图3，本实施例中的第一凹槽4和第二凹槽5可以设置在第一容纳槽2的相对的两侧，也可以设置在第一容纳槽2的同一侧，本实施例中并不对此加以限制，由实际应用决定。
基板101还包括第一裁剪片81和第二裁剪片82，第一裁剪片81和第一壳体102一体成型，第一裁剪片81设置于第一壳体102的远离第一直线6的一侧。第二裁剪片82和第二壳体103一体成型，第二裁剪片82设置于第二壳体103的远离第一直线6的一侧。第一裁剪片81和第二裁剪片82在第一壳体102上的投影部分或完全重合，第一裁剪片81和第二裁剪片82相对设置，外部设备的夹具或者人工分别夹住第一裁剪片81和第二裁剪片82，撑开第一壳体102和第二壳体103之间未被焊接的边沿，从而方便注液。
在本实施例中，第一裁剪片81和第二裁剪片82予以保留。在其他实施例中，出于美观和体积考虑，在焊接注液边沿7后，可以将第一裁剪片81和第二裁剪片82切割掉，使得金属壳体1呈正方体状。
在本实施例中，第一容纳槽2的容积大于或等于第二容纳槽3的容积。金属壳体1中的第二容纳槽3用于在后续的电池100加工的注液工序中，作为储液袋使用，可以用于暂时存储第一容纳槽2内的电芯浸润所需的电解液，在电芯的浸润过程中，第二容纳槽3内所暂时存储的电解液将会逐步渗入第一容纳槽2内。并且，该第二容纳槽3在后续的电池100加工的化成工序中，作为排气袋使用，可以用于暂时存储电池100化成所产生的气体，待化成工序完成后，该第二容纳槽3可以通过裁切的方式与第一容纳槽2分离，或者通过排气的方式，将第二容纳槽3压扁，使得金属壳体1在第二容纳槽3处形成散热翅片16。因此，在满足第一容纳槽2内的电芯的加工需求的前提下，该第二容纳槽3的容积越小越好，且势必使得第一容纳槽2的容积大于等于第二容纳槽3的容积。
第一容纳槽2的长度和第二容纳槽3的长度相同。本实施例中第一容纳槽2的容积大于第二容纳槽3，但是二者的长度相同，第二容纳槽3的长度方向为平行于第一直线6的方向。第一容纳槽2的截面积与第二容纳槽3的截面积之比为1:0.05至1：0.5。该第一容纳槽2的截面积与第二容纳槽3的截面积相关，该第一容纳槽2的截面积越大，该第二容纳槽3的截面积对应增大。一般来说，在第一容纳槽2和第二容纳槽3的长度相同的前提下，该第一容纳槽2的截面积为第二容纳槽3的截面积的6倍，即可满足第一容纳槽2内部的电芯在加工过程中的排气以及注液的需求，即该第一容纳槽2的截面与第二容纳槽3的截面积之比为1:0.166。若该第一容纳槽2的截面积与第二容纳槽3的截面积之比小于1:0.05，则该金属壳体1在后续的电池100加工中，第二容纳槽3无法满足化成的排气需求，化成工序内的气体将会对金属壳体1造成不可逆的损坏。而若该第一容纳槽2的截面积与第二容纳槽3的截面积之比超过1:0.5时，整个金属壳体1的体积增大，尤其是第二容纳槽3的占比过大，将会影响金属壳体1加工后的电池100的整体尺寸，不利于电池100模组和电池100包的排布。
在本实施例中，第一容纳槽2的深度为5-40mm，该第一容纳槽2的深度由后续电池100容量需求决定，电池100容量越大，该第一容纳槽2的容积越大，对应的第一容纳槽2的深度越大，并且该第一容纳槽2的深度受到基板101的厚度影响，为了保障第一容纳槽2的结构强度，优选在基板101的厚度为0.2mm时，该第一容纳槽2的深度控制在10-14mm之间，优选为第二容纳槽3形成，所述气袋设置于12.1mm。
第二容纳槽3的深度为2-20mm，该第二容纳槽3的深度与第一容纳槽2内的电池100容量相关，电池100容量越大，对应的该第二容纳槽3的容积越大，对应的第二容纳槽3的深度越大，并且该第二容纳槽3的深度受到基板101的厚度影响，为了保障第二容纳槽3的结构强度，优选在基板101的厚度为0.2mm时，优选为7mm。
本实施例中的第一容纳槽2和第二容纳槽3的深度较小，且冲压次数少，降低了生产成本。
而且，第二容纳槽3的靠近第一容纳槽2的侧壁呈倾斜设置，使得该倾斜设置的侧壁沿第二容纳槽3的槽底至第一壳体102的方向逐渐靠近第一容纳槽2。
在本实施例中，第一容纳槽2和第二容纳槽3之间的间距为X，第一容纳槽2的深度为H，3H≥X≥0.5H。当第一容纳槽2长度与第二容纳槽3的长度一致时,即图1所示的结构时，该第一容纳槽2和第二容纳槽3之间的间距X必须要大于H，优选X＝1.5H,若此时X小于H，则无法保障第一容纳槽2和第二容纳槽3的冲压质量，相邻的槽体边缘的结构强度减弱；当第一容纳槽2的长度小于第二容纳槽3的长度时，该第一容纳槽2和第二容纳槽3之间的间距X可以小于等于H，该第二容纳槽3的长度越小，该第一容纳槽2和第二容纳槽3之间的间距X越小，但是若X小于0.5H时，该第一容纳槽2和第二容纳槽3的冲压质量降低，无法保障两个槽体的结构强度满足后续电池100的加工需求。而第一容纳槽2和第二容纳槽3之间的间距X过大，即超过3H时，则导致后续电池100加工的外部整体尺寸过大，不利于电池100的整体结构布局。
在其他实施例中，第一容纳槽2的深度可以等于第二容纳槽3的深度，只需要满足第一容纳槽2的容积大于第二容纳槽3的容积即可。
在本实施例中，基板101的厚度为0.1-0.4mm。最佳地，基板101的厚度为0.2mm。相较于现有技术的金属壳体1厚度大多为0.4-0.6mm；刀片电池100厚度0.3mm，本实施例中壳体厚度具有超薄、重量轻、成本低以及单位体积内电池100容量提升的优点。
第二实施例
参照图5，本发明第二实施例的电池100，包括内绝缘膜14、外绝缘膜15、极芯9、正极盖板、负极盖板和上述任一实施例的金属壳体1，内绝缘膜14分别设置在第一壳体102和第二壳体103的相向侧，外绝缘膜15设置在第一壳体102和第二壳体103的外表面。
极芯9放置入第一容纳槽2，正极盖板安装在第一凹槽4和第二凹槽5中的一个，负极盖板安装在第一凹槽4和第二凹槽5中的另一个。
金属壳体1除第一直线6所处的边沿外的三个边沿均焊接连接。
本实施例中的金属壳体1将第一裁剪片81和第二裁剪片82在焊接注液边沿7后予以裁除。
如图5-图11，本申请一实施例提供一种电池100，包括极芯9、盖板组件13和金属壳体1，所述极芯9与所述盖板组件13连接，所述金属壳体1包括容纳部和存储部10，所述容纳部设置有第一容纳腔和第二容纳腔，所述第一容纳腔用于容纳所述极芯9，所述第一容纳腔由所述第一壳体102封闭所述第一容纳槽2形成，所述第二容纳腔设置于所述第一容纳腔的一端，且所述第二容纳腔与所述第一容纳腔连通，所述第二容纳腔用于容纳所述盖板组件13，所述存储部10包括用于存储电解液或气体的气袋和用于注液的注液边沿7，所述气袋由所述第一壳体102封闭所述第二容纳槽3形成，所述气袋设置于所述第一容纳腔的一侧，且与所述第一容纳腔连通；所述气袋远离所述第一容纳腔的一侧设置有所述注液边沿7。
具体的，如图5-8所示，本申请提供的电池100，包括两个盖板组件13，其中一个为正极盖板组件13， 另一个为负极盖板组件13。正极盖板组件13与极芯9的正极耳焊接，负极盖板组件13与极芯9的负极耳焊接。需要说明的是，本申请的第一方向、第二方向例如如图5所示，第一方向为x方向，第二方向为y方向，第一方向与第二方向垂直。
如图5-7所示，所述极芯9与所述盖板组件13连接，优选极芯9与盖板组件13通过焊接连接，焊接方式可以为激光焊接。在第一方向上，第一容纳腔的两端各设置有一个第二容纳腔，每个第二容纳腔容纳一个盖板组件13。金属壳体1中的第一容纳腔是用于容纳极芯9，第二容纳腔与第一容纳腔连通，使得第二容纳腔能够用于容纳盖板组件13。
所述存储部10包括气袋和注液边沿7，在第二方向上所述第一容纳腔的一端设置有所述气袋，所述气袋远离所述第一容纳腔的一侧设置有注液边沿7，所述气袋用于存储电解液或气体。如图5-7所示，气袋主要用于存储电解液或气体，此处的气体是指电池100充放电过程中产生的气体，存储电解液是因为本申请提供的电池100进行一次注液，极芯9无法全部将电解液浸润吸收，多余的电解液可能会存储在气袋中，随着电池100静置时间的增加，气袋中的电解液能够流至第一容纳腔中，使得电解液能够被极芯9吸收。在电池100注液之前，注液边沿7在电池100密封之前为开口端，且除了开口端处的壳体未密封，电池100的其余两侧都已经密封焊接，在电池100注液时，直接打开开口端，将注液装置中的注液端对准开口端，将电解液通过开口端注入电池100中，通过开口端注入电解液能够使得电解液快速浸润极芯9中，提高电解液的浸润效率；注液完成后，将开口端进行密封焊接从而形成注液边沿7，密封方式可以选择激光焊接或电阻焊。
与现有技术相比，本申请提供的电池100，主要有以下效果：1)与注液孔进行注液相比，本申请提供的电池100，设置的注液边沿7用于注液，注液口大，加快注液速度，缩短注液工序的时间，提高生产效率。2)与现有的电池100相比，本申请提供的电池100，设置有气袋，直接进行一次注液，多余的电解液直接存储在气袋中，不需要多次注液，简化注液步骤；同时在后续的浸润过程中，气袋内的电解液可以逐步流至第一容纳腔中从而使得气袋中的电解液能够完全浸润到极芯9中。3)气袋在化成工序中，能够收集电池100产生的气体，不需要在化成过程中持续真空排气工序，节省成本。4)与软包电池100相比，本申请提供的电池100，气袋用于储存电解液和电池100化成产生的气体，避免出现存储部10不足带来的电芯胀气或外观不良问题；化成结束后直接将气袋压扁，将气体排出电池100，无需抽真空排气，减少电解液被抽出。在一些实施例中，所述金属壳体1包括折边和两个壳体本体，两个所述壳体本体中其中一个设置有第一容纳槽2、第二容纳槽3和第一凹槽4，在第一方向上所述第一容纳槽2的端部设置有所述第一凹槽4，且所述第一容纳槽2与所述第一凹槽4连通；在第二方向上所述第一容纳槽2与所述第二容纳槽3间隔设置，所述第一方向与所述第二方向垂直；
两个所述壳体本体沿所述折边对折，一个所述壳体本体的所述第一容纳槽2与另一所述壳体本体形成所述第一容纳腔，一个所述壳体本体的所述第一凹槽4与另一所述壳体本体形成所述第二容纳腔，一个所述壳体本体的所述第二容纳槽3与另一所述壳体本体形成所述气袋。
具体的，将两个壳体本体定义为第一壳体102和第二壳体103，在第一壳体102上设置有第一容纳槽2、第二容纳槽3、第一凹槽4，其中第一容纳槽2、第二容纳槽3、第一凹槽4优选通过冲压形成。直接 在第一壳体102上形成第一容纳槽2、不在第二壳体103上冲坑，相比于现有在软包电池100中对铝塑膜的两面都冲坑相比，本申请提供电池100的减少工序，缩短工艺时间。如图5-7所示，第一凹槽4、第一容纳槽2、第二容纳槽3都在同一个壳体本体上冲压形成，金属壳体1的材质优选铝壳材质，壁厚厚度均匀，整体结构强度一致，同时也能保证四个边角的结构强度一致，相比于现有的软包铝塑膜复合膜材质，本申请提供的电池100，壳体采用金属材质散热效果更好。
在一些实施例中，金属壳体1的材质包括铝、铝合金等。
在一些实施例中，金属壳体1的厚度为0.2mm。
第二容纳槽3与第二壳体103形成气袋，用于储存电解液和电池100化成产生的气体。第一凹槽4与第二壳体103形成第二容纳腔，用于容纳盖板组件13。
在一些实施例中，所述第一容纳腔的容积为V1，所述气袋的容积为V2，
V1：V2的范围为1：(0.05～0.5)。电池100中的气袋用于在电池100加工的注液工序中，作为储液袋使用，可以用于暂时存储第一容纳腔内的极芯9浸润所需的电解液，在极芯9的浸润过程中，气袋内所暂时存储的电解液将会逐步渗入第一容纳腔内。并且，该气袋在电池100加工的化成工序中，作为排气袋使用，可以用于暂时存储电池100化成所产生的气体，待化成工序完成后，该气袋可以通过裁切的方式与第一容纳腔分离，或者通过排气的方式，将气袋压扁，使得电池100在气袋处形成延伸部8。因此，在满足第一容纳腔内的极芯9的加工需求的前提下，该气袋的容积越小越好。
具体的，如图5-8所示，气袋的高度小于第一容纳腔的高度，限定气袋的容积V2小于第一容纳腔的容积V1，同时限定V1：V2的范围为1：(0.05～0.5)，能够在不增加电池100的整体厚度，减少气袋的占用体积的同时，也能够有足够容积的气袋来储存电池100化成产生的气体，避免或减少电池100气胀的发生。同时，由于电池100加工工艺的不同，极芯9的排气量也会有较大差异，因此，在相同的第一容纳腔的容积V1的前提下，根据不同的加工工艺，可以调整该气袋的容积V2，使得气袋的容积V2可以满足电池100的加工需求。
进一步优选的，V1：V2的范围为1：(0.1～0.4)。更进一步优选的，V1：V2的范围为1：(0.1～0.3)；更进一步优选的，V1：V2的范围为1：(0.1～0.2)。
在一些优选的实施例中，V1：V2的比值为1：0.166。该第一容纳腔的容积V1与气袋的容积V2相关，该第一容纳腔的容积V1越大，该气袋的容积V2对应增大。一般来说，在第一容纳腔的容积V1为气袋的容积V2的6倍，即可满足第一容纳腔内部的极芯9在加工过程中的排气以及注液的需求，即第一容纳腔的容积V1与气袋的容积V2之比为1：0.166。
在一些实施例中，沿远离所述第一容纳槽2的方向，所述第二容纳槽3靠近所述第一容纳槽2的一侧的侧面与另一所述壳体本体之间的间距逐渐增大。
具体的，如图5所示，沿着远离第一容纳槽2的方向上，即沿着y轴的方向上，第二容纳槽3靠近第一容纳槽2的一侧的侧面倾斜设置，倾斜方向是从第二容纳槽3的槽底向靠近第二壳体103的方向上，第一容纳槽2的一侧的侧面与第二壳体103之间的间距逐渐增大。在第二容纳槽3靠近第一容纳槽2的一侧倾斜设置，为了便于电解液沿着倾斜设置的侧面流至第一容纳腔中；同时电池100化成后进行排气时，便 于沿着倾斜设置的侧面将气袋中的气体排出，且不需要抽真空排气，减少电解液被抽出。
在一些实施例中，在第一方向上，所述第一容纳槽2的长度为L1，所述第二容纳槽3的长度为L2，L2≤L1，L2：L1的范围为(0.1～1.0)：1。
具体的，在第一方向上，第一容纳槽2的长度L1大于等于第二容纳槽3的长度L2，且L2：L1的范围为(0.1～1.0)：1即第二容纳槽3的长度小于极芯9的长度，不增加电池100的整体长度，减少气袋的占用体积。
具体的，L2：L1的比值可以为0.1，0.2，0.3，0.4，0.5，0.6，0.7，0.8、0.9或1.0等，只要L2：L1的比值在(0.1～1.0)：1内皆可。在本实施例中，如图5所示，该第二容纳槽3的长度L2等于第一容纳槽2的长度L1，即L1＝L2。
在一些实施例中，所述盖板组件13包括第一焊接面134和第二焊接面135，所述第一焊接面134为平面1351结构，所述第一焊接面134与另一个所述壳体本体焊接；
所述第二焊接面135包括两个弧面1353、平面1351和两个斜面1352，两个所述斜面1352分别通过所述弧面1353与所述平面1351的两端连接；
所述第二焊接面135与一个壳体本体的所述第一凹槽4焊接。
具体的，将第一焊接面134设置为平面1351结构，是为了便于将第一焊接面134与第二壳体103进行焊接，降低焊接难度，提高焊接效率；此处的焊接方式包括激光焊接或电阻焊，优选激光焊接。
第二焊接面135是由弧面1353、平面1351和斜面1352构成，这是因为盖板组件13有一定的厚度，故在第一壳体102上设置第一凹槽4，用于容纳具有一定厚度的盖板组件13；第一凹槽4的形状与盖板组件13中第二焊接面135的形状相同，从而便于容纳盖板组件13。如图11所示，第二焊接面135包括一个平面1351，在平面1351的两端各设置有一个弧面1353，弧面1353是起到过渡作用，每个弧面1353远离平面1351的一端连接有斜面1352，斜面1352是起到便于第二壳体103和第一壳体102密封焊接的作用。若无斜面1352过渡，盖板组件13与第一壳体102、第二壳体103之间焊接会存在空隙，影响电池100的密封。
在一些实施例中，盖板组件13包括引出片130、绝缘件132和盖板主体133，所述盖板主体133内设置有第一安装孔136，所述绝缘件132插入所述第一安装孔136并延伸出所述盖板主体133，所述绝缘件132内设置有第二安装孔1321，引出片130设置在所述第二安装孔1321内并延伸出所述绝缘件132，所述引出片130的延伸出所述绝缘件132的长度大于所述绝缘件132的延伸出所述盖板主体133的长度。
绝缘件132延伸出盖板主体133，起到绝缘作用，防止电池100短路。引出片130延伸出绝缘件132，一端的延伸部8分与极芯9的极耳91或连接片焊接，另一端的延伸部8分用于与外部电路电连接。
进一步的，所述引出片130的延伸出所述绝缘件132的长度大于所述绝缘件132的延伸出所述盖板主体133的长度为6-7mm；便于引出片130的一端与极芯9的极耳91或连接片焊接，引出片130的另一端用于与外部电路电连接。本实施中的盖板组件13无注液孔，极柱为引出片130，可以做到很薄0.5mm的厚度，故盖板组件13的厚度可以做到极薄，对应的电池100的整体厚度也可以做到极薄(最薄可以做到6mm厚度)。现有的电池100受限于盖板组件13的结构，一般是做到18mm已经是非常薄了(因为现有方 形电池100的盖板组件13包括极柱、注液孔、防爆阀等，盖板组件13的宽度较宽)，故与现有技术相比，本申请提供的电池100厚度较薄，减小电池100的占用空间。
在一些实施例中，在第二方向上，所述气袋的延伸方向与所述第一容纳腔的延伸方向平行设置；或在第二方向上，所述气袋的延伸方向与所述第一容纳腔的延伸方向垂直。
气袋与第一容纳腔的一种设置方式如图5-8所示，在第二方向上，气袋与第一容纳腔是并排设置的，气袋的延伸方向与第一容纳腔的延伸方向平行设置。
气袋与第一容纳腔的另一种设置方式如图8所示，气袋的延伸方向与第一容纳腔的延伸方向垂直
可以理解的是，气袋的延伸方向与所述第一容纳腔的延伸方向具有有夹角，夹角在0-180°范围均可以，对于夹角为0或180°即为平行设置，夹角为90°为垂直设置，夹角为其它角度也是存在的。该夹角为锐角时，该斜面1352更加有利于气袋内电解液的导流。
在一些实施例中，所述金属壳体1朝向所述极芯9的内表面设置有内绝缘膜14，所述内绝缘膜14设置在所述金属壳体1与所述极芯9之间，且所述内绝缘膜14包覆所述极芯9；
所述金属壳体1背离所述极芯9的外表面设置有外绝缘膜15，所述外绝缘膜15包覆所述金属壳体1的外周。
内绝缘膜14包覆极芯9，外绝缘膜15包覆在金属壳体1的外周，都是防止电池100短路的作用。
可以理解的是，内绝缘膜14的结构与金属壳体1的结构相同。还可以是内绝缘膜14结构与金属壳体1的结构不同，只要满足内绝缘膜14包覆在极芯9的外周，防止电池100短路即可。如图7所示，外绝缘膜15的结构优选与金属壳体1的结构相同，能够实现外绝缘膜15完全包覆在金属壳体1的外周，达到防止电池100短路的作用。
在一些实施例中，如图5-7所示，所述第一容纳槽2靠近所述第二容纳槽3的侧面为弧面1353，第二容纳槽3靠近所述第一容纳槽2的侧面为弧面1353。
第一容纳槽2、第二容纳槽3都是通过冲坑形成，第一容纳槽2靠近第二容纳槽3的侧面冲成弧面1353，第二容纳槽3靠近第一容纳槽2的侧面也为弧面1353，能够减小材料应力，能够有效的提高第一容纳槽2、第二容纳槽3的冲坑效率。
在一些实施例中，第一容纳槽2与所述第二容纳槽3之间的距离为X，所述第一容纳槽2的深度为H，H与X满足以下关系式：0.5H≤X≤3H。
若X过低，第一容纳槽2与第二容纳槽3之间的距离过近，在冲坑时容易冲破第一容纳槽2和/或第二容纳槽3，生产成本增加，若X过大，金属壳体1的体积增加，电池100的成本增加，体积能量密度降低。第一容纳槽2与第二容纳槽3之间的距离X与第一容纳槽2的深度H满足以下关系式：0.5H≤X≤3H，能够有效的提高冲坑形成第一容纳槽2、第二容纳槽3的效率。
需要说明的是，第一容纳槽2靠近第二容纳槽3的第一侧面，第二容纳槽3靠近第一容纳槽2的第二侧面，且第一侧面和第二侧面都是弧面1353，本实施例限定的第一容纳槽2与所述第二容纳槽3之间的距离X为第一侧面朝向第一容纳槽2开口的一侧与第二侧面朝向第二容纳槽3开口的一侧之间的距离。
在一些优选的实施例中，H与X满足以下关系式：1.0H≤X≤2.5H。
进一步优选的，H与X满足以下关系式：1.0H≤X≤2.0H；更进一步优选的，X＝1.5H。
在一些实施例中，所述注液边沿7背离所述气袋的一端还设置有延伸部8，所述延伸部8的截面为多边形。
如图5所示，延伸部8也可以用于储存气体，当电池100化成结束后，延伸部8中储存有气体，直接将延伸部8剪开，释放气袋和延伸部8的气体，之后将剪开部分进行焊接，即可实现对电池100的密封；其中焊接方式可以采用激光焊接或电阻焊，优选电阻焊。如图6所示，或者是将延伸部8剪掉，注液边沿7的截面就是直线型，直接通过电阻焊或激光焊接将修剪部分的金属壳体1进行焊接。
需要说明的是，延伸部8的截面为多边形，多边形的边数为n，n≥3，如可以为正方形、长方形、五边形等，优选截面为正方形或长方形。
在一些实施例中，所述注液边沿7的截面为直线型或L型。
如图6所示，当将延伸部8整体剪掉后，注液边沿7的截面即为直线型，若不剪掉延伸部8，注液边沿7的截面即为L型。对于是否剪掉延伸部8，可以根据实际需要进行选择，本申请不做限定。
需要说明的是，电池100化成后产生的气体可以通过压扁气袋将气体排出电池100，因为气袋中还有电解液，若直接将气袋切除后将金属壳体1进行密封焊接，因为存在电解液，影响壳体的焊接，故本申请提供的电池100，是保留气袋的，保留气袋的电池100，能够提高两个弯折面的焊接效率，提高生产效率。通过图3、4可知，图3是未将气袋压扁的结构图，图4是在排出气体后，直接将气袋压扁的结构图。可以理解的是，气袋是否压扁，可以依据实际情况进行对应选择压扁或不压扁，本申请不做限定。
第三方面，本发明实施例提供了一种电池100制作方法，参照图12-17，包括：
S1：将盖板组件13与电池100极芯9的极耳91相接；
S2：将电池100极芯9放置在金属壳体1的第一容纳槽2，并使盖板组件13放置在与第一容纳槽2连通的盖板安装位11上；
S3：弯折金属壳体1，以使金属壳体1的第一容纳槽2形成空置腔，金属壳体1的第二容纳槽3形成气袋；
S4：焊接金属壳体1的两个第一侧面，对第一容纳腔进行注液；
S5：焊接金属壳体1第一侧边相对的一侧面，对第一容纳腔进行化成；
S6：切去气袋，对第一容纳腔进行抽真空；
S7：对第一容纳腔进行封口。
作为一示例，步骤S1中，先将盖板组件13的引出片130与电池100极芯9的极耳91相连，形成一个整体结构，便于安装在金属壳体1内，提高安装效率。
作为一示例，步骤S2中，然后将电池100极芯9放置在金属壳体1的第一容纳槽2，并使盖板组件13放置在与第一容纳槽2连通的盖板安装位11上，这样便于将盖板组件13、电池100极芯9和金属壳体1组装在一起，从而提高生产效率。
作为一示例，步骤S3中，金属壳体1包括第一壳体102和第二壳体103；将金属壳体1从第一壳体102和第二壳体103相接处进行弯折，第一壳体102作为底壳，第二壳体103作为顶壳，第一壳体102上设有第一容纳槽2和第二容纳槽3，两者配合以使金属壳体1的第一容纳槽2形成空置腔，金属壳体1的第二容纳槽3形成气袋，第一容纳腔内安装有电池100极芯9，用于后期注入电解液；气袋与第一容纳腔连通，前期用于给第一容纳腔导液，后期用于给第一容纳腔进行排气。其中，第一容纳腔的周边和气袋的 周边为热熔区域，用于后期焊接；热熔区域宽度为2mm。
作为一示例，步骤S4中，焊接金属壳体1的两个第一侧面，使第一容纳腔形成一个储液室，使气袋形成一个注液通道，从气袋的开口侧对第一容纳腔进行注入电解液。其中，气袋不能用于储存电解液。
作为一示例，步骤S5中，在注入电解液完成后，焊接金属壳体1第一侧边相对的一侧面即气袋的开口侧，然后对第一容纳腔进行化成。其中，焊接处需要把电解液清理干净，避免焊接不严，造成电池100结构漏液。
作为一示例，步骤S6中，在化成完成后，切去气袋，对第一容纳腔进行抽真空，这样可以快速将第一容纳腔内的气体排出，并且不用对气袋进行压扁操作，减小金属壳体1破裂的风险。
作为一示例，步骤S7中，当排气达到要求后，对第一容纳腔进行封口，完成电池100结构的制作。其中，封口处需要把电解液清理干净，避免封口不严，造成电池100结构漏液。
在现有的电池100结构的制作过程中，电池100极芯9是从金属壳体1的一侧开口慢慢推入的，安装效率低，对电池100极芯9有损伤风险；而且对金属壳体1开口处毛刺零容忍导致制作成本高。本示例中，通过先把电池100极芯9放置在金属壳体1内，然后弯折金属壳体1形成第一容纳腔和气袋，再焊接金属壳体1的两个第一侧面，使第一容纳腔形成一个储液室，使气袋形成一个注液通道，从气袋的开口侧对第一容纳腔进行注入电解液，焊接金属壳体1第一侧边相对的一侧面即气袋的开口侧，然后对第一容纳腔进行化成，然后切去气袋，对第一容纳腔进行抽真空，最后对第一容纳腔进行封口，完成电池100结构的制作；与现有的电池100制作方法相比，电池100极芯9的安装更方便，避免电池100极芯9受到损伤，采用金属壳体1弯折成第一容纳腔，可以降低工艺要求，从而降低制作成本。其中，气袋的体积按65ml设计，化成产气量65.00mL大于气袋设计体积，化成过程中可能需要两次排气；循环过程产气量为(20％)13.00mL；气袋设计体积可以满足循环产气要求；其中，焊接方式一般采用电阻焊、EPMT和超声滚焊中的任一种。
与现有的电池100制作方法相比，电池100极芯9的安装更方便，电池100极芯9直接放置入金属壳体1内，一次装配即可，避免电池100极芯9装配过程中受到损伤，本发明所提到的电池100制作方法中所采用的金属壳体1具有第一容纳槽2和第二容纳槽3，利用该第二容纳槽3有效地解决电池100加工过程中注液工序的注液量不足和化成工序中排气的问题，从而简化硬壳电池100的盖板结构，使得盖板组件13的结构更为简化，该盖板组件13不仅结构简单、加工方便，装配和密封均满足电池100的基本需求，且可以实现盖板组件13的极薄化设计，盖板组件13的整体厚度最薄可以为6mm。同时，整个电池100制作方法中，由于金属壳体1上所设置的第二容纳槽3形成气袋，可以有效地提升注液工序的效率以及化成工序的效率，大幅缩短整个电池100结构的制作时间，并且该气袋在电池100制作方法中最后切除。
在一实施例中，参照图18、图19和图20，盖板组件13包括与金属壳体1相接的盖板主体133；盖板本体1的外环面具有首尾相连的第一焊接面134和第二焊接面135，第一焊接面134包括第一平面，第二焊接面135包括两个分别于第一焊接面134连接的第一倾斜面和第二倾斜面，以及将第一倾斜面和第二倾斜面连接的第二平面，第一平面和第二平面相互平行设置，盖板主体133上设有第一安装孔136，第一安装孔136位于第一平面和第二平面之间。
作为一示例，盖板组件13包括与金属壳体1相接的盖板主体133，盖板主体133采用3003铝制成，作为固定座，用于安装在金属壳体1的盖板安装位11上，盖板主体133上设有第一安装孔136，用于装配盖板组件13中与电池100极芯9相连的结构。盖板本体1的外环面具有首尾相连的第一焊接面134和第二焊接面135，第一焊接面134包括第一平面，第二焊接面135包括两个分别于第一焊接面134连接的第一倾斜面和第二倾斜面，以及将第一倾斜面和第二倾斜面连接的第二平面，第一平面和第二平面相互平行设置，这样设置便于将盖板主体133与金属壳体1焊接在一起；第一倾斜面、第二倾斜面和第二平面配合形成安装面，与金属壳体1的盖板安装位11相匹配，便于将盖板主体133安装在金属壳体1上；盖板主 体133上设有第一安装孔136，第一安装孔136位于第一平面和第二平面之间，保证将与电池100极芯9相连的结构安装在盖板主体133上。
在一实施例中，参照图18、图11、图19和图20，盖板组件13还包括设置于盖板主体133内的引出片130；引出片130包括呈矩形片状结构的主体部分以及环绕主体部分的环形凹槽，使得引出片130在环形凹槽的两侧形成第一端和第二端；引出片130的第一端与金属壳体1内电池100极芯9的极耳91相连，引出片130的第二端用于连接外部电路。
作为一示例，盖板组件13还包括设置于盖板主体133内的引出片130；引出片130采用1060铝制成，引出片130装配在盖板主体133内；引出片130包括呈矩形片状结构的主体部分以及环绕主体部分的环形凹槽，使得引出片130在环形凹槽的两侧形成第一端和第二端；引出片130的第一端与金属壳体1内电池100极芯9的极耳91相连，引出片130的第二端用于连接外部电路，以实现电池100极芯9的极耳91和外部电路的电连接。
在一实施例中，参照图18、图11、图19和图20，盖板组件13还包括设置于盖板主体133和引出片130之间的绝缘件132；
在将盖板组件13与电池100极芯9的极耳91相接之前，电池100制作方法还包括：
将盖板主体133和引出片130进行注塑成型操作，使得盖板主体133和引出片130之间形成绝缘件132，绝缘件132将盖板主体133和引出片130固定于一体。
作为一示例，板组件还包括设置于盖板主体133和引出片130之间的绝缘件132，在将盖板组件13与电池100极芯9的极耳91相接之前，将盖板主体133和引出片130进行注塑成型操作，使得盖板主体133和引出片130之间形成绝缘件132，绝缘件132将盖板主体133和引出片130固定于一体。其中，绝缘件132采用PPS-SGX-120制成，具有绝缘保护作用，绝缘件132装配在第一安装孔136内，绝缘件132上设有第二安装孔1321，用于装配引出片130。与现有的盖板组件13相比，取消了防爆阀和注液孔，盖板主体133、绝缘件132和引出片130的厚度均可根据实际需求调整，整体厚度尺寸可以大幅缩小，整体厚度可以做极薄电池100，盖板主体133与金属壳体1之间的焊接更容易实现。参照图18，绝缘件132包括绝缘主体1322和两个限位部1323，两个限位部1323是从绝缘主体1322的两端分别延伸出的，绝缘主体1322装配在第一安装孔136内，两个限位部1323分别与盖板主体133沿第一安装孔136的轴向方向的两个侧面抵接，可以对盖板主体133进行限位，保证盖板主体133稳固的安装在绝缘件132上。绝缘主体1322上设有第二安装孔1321，第二安装孔1321的轴向方向与第一安装孔136的轴向方向相同，第二安装孔1321用于安装引出片130。绝缘件132还包括从限位部1323上延伸出的卡接部1324，卡接部1324与绝缘主体1322平行相对设置；在盖板主体133上设有卡接槽137，卡接部1324与卡接槽137匹配，为盖板主体133的安装提供限位固定，保证盖板主体133与绝缘件132之间的连接更加稳定牢靠。
在一实施例中，参照图12和图17，步骤S1，即将盖板组件13与电池100极芯9的极耳91相接，包括：
S11：对电池100极芯9的极耳91进行预焊裁切；
S12：将盖板组件13的引出片130的第一端焊接在电池100极芯9的极耳91上，并在焊点处贴胶；
S13：将盖板组件13的引出片130的第二端穿过盖板主体133延伸至金属壳体1外部。
作为一示例，步骤S11中，先对电池100极芯9的极耳91进行预焊，极耳91预焊后，在厚度方向偏离中心4.1mm，然后对极耳91进行裁切，裁切倒角为5mm*8mm，便于电池100极芯9的极耳91与盖板组件13的引出片130相接，这样设置可以保证电池100极芯9的顶部与盖板组件13保持在一个水平面上，便于安装在金属壳体1内。
作为一示例，步骤S12中，将盖板组件13的引出片130的第一端焊接在电池100极芯9的极耳91上，并在焊点处贴胶，可以使电池100极芯9的极耳91与盖板组件13的引出片130连接更加稳定。
作为一示例，步骤S13中，将盖板组件13的引出片130的第二端穿过盖板主体133延伸至金属壳体1外部，用于连接外部电路，以实现电池100极芯9的极耳91和外部电路的电连接。
在一实施例中，参照图12和图19，金属壳体1包括第一壳体102和从第一壳体102的第一侧边弯折延伸出的第二壳体103；第一壳体102上设有第一容纳槽2、第二容纳槽3和与第一容纳槽2连通的两个盖板安装位11；两个盖板安装位11分别设置在第一壳体102上相对设置的两个第一侧面上，第一侧面为与第一侧边垂直的侧面；第一壳体102和第二壳体103相接，两者配合形成第一容纳腔和气袋。
作为一示例，金属壳体1包括第一壳体102和从第一壳体102的第一侧边弯折延伸出的第二壳体103；第一壳体102上设有第一容纳槽2、第二容纳槽3和与第一容纳槽2连通的两个盖板安装位11；两个盖板安装位11分别设置在第一壳体102上相对设置的两个第一侧面上，第一侧面为与第一侧边垂直的侧面，第一壳体102和第二壳体103相接，两者配合形成第一容纳腔和气袋，第一容纳腔用于安放电池100极芯9，每一盖板安装位11内装配一盖板组件13，这样设置便于对电池100结构进行组装，提高生产效率。在制作电池100结构时，首先在第一壳体102内集成第一容纳槽2、第二容纳槽3和与第一容纳槽2连通的两个盖板安装位11，然后弯折第二壳体103，使第二壳体103与第一壳体102相接，以使第一腔体421与第二壳体103配合形成第一容纳腔，第二腔体422与第二壳体103配合形成气袋，第一容纳腔内安装有电池100极芯9，用于后期注入电解液；气袋与第一容纳腔连通，前期用于给第一容纳腔导液，后期用于给第一容纳腔进行排气，为制作电池100结构提供便利。
在一实施例中，参照图12和图17，在焊接金属壳体1的两个第一侧面中，包括：正面焊接的焊缝为第一侧面上盖板主体133的第二焊接面135与第一壳体102的盖板安装位11的连接处，反面焊接的焊缝为第一侧面上盖板主体133的第一焊接面134与第二壳体103的连接处以及第一壳体102和第二壳体103的重叠处。
作为一示例，盖板组件13安装在金属壳体1的盖板安装位11上，在焊接金属壳体1的两个第一侧面时，盖板组件13位于金属壳体1弯折的两部之间，因此焊接时，正面焊接的焊缝为第一侧面上盖板主体133的第二焊接面135与第一壳体102的盖板安装位11的连接处，反面焊接的焊缝为第一侧面上盖板主体133的第一焊接面134与第二壳体103的连接处以及第一壳体102和第二壳体103的重叠处，这样可以保证金属壳体1与盖板组件13之间连接的密封性，避免注液时发生漏液。
在一实施例中，参照图12，在对第一容纳腔进行封口之前，电池100制作方法还包括：
在金属壳体1的第一直线6的相对边上预留散热翅片16。
作为一示例，在制作电池100结构中，还可以在对第一容纳腔进行封口之前，在金属壳体1的第一直线6的相对边上预留散热翅片16，从而便于后期对制作完成的电池100结构进行散热，提高设备使用安全性。，该金属壳体1在第一容纳腔侧面所保留的部分即为电池100结构的散热翅片16，切除该气袋可以有效地控制电池100侧面的散热片的尺寸，利用第一容纳腔与气袋之间的壳体部分作为散热，还能提升加工后的电池100的使用寿命。其中，散热翅片16的高度不受气袋大小限制，可自由设计。散热翅片16可以单独设置在第一壳体102上，也可以单独设置在第二壳体103上，还可以设置在第一壳体102和第二壳体103上，位于与第一侧边相对的一侧面上，可以有效对第一容纳腔进行散热，保证设备使用安全。
在一实施例中，参照图13、图14、图15和图16，对第一容纳腔进行封口包括直接焊接封口方式、包边焊接封口方式和双重卷封封口方式中的任一种封口方式。
作为一示例，对第一容纳腔进行封口包括直接焊接封口方式、包边焊接封口方式和双重卷封封口方式中的任一种封口方式；直接焊接封口方式是在金属壳体1的第一直线6的相对边上使用激光焊接直接焊接两道焊缝，从而实现对第一容纳腔进行封口，保证封口密封效果；包边焊接封口方式是先在金属壳体1的第一直线6的相对边上包裹一层包边，然后使用激光焊接将包边焊接在金属壳体1的第一直线6的相对边上，从而实现对第一容纳腔进行封口，保证封口密封效果；双重卷封封口方式为将金属壳体1的第一直线 6的相对边上翻折两下，从而实现对第一容纳腔进行封口，保证封口密封效果。
作为一示例，参照图19，在将电池100极芯9放置在金属壳体1的第一容纳槽2，并使盖板组件13放置在与第一容纳槽2连通的盖板安装位11上之前，预先将内绝缘膜14设置在整个第一容纳腔的内壁上，可以在电池100极芯9和第一容纳腔的内壁之间提供有效绝缘，使电池100结构内部具有好的绝缘效果。在对第一容纳腔进行封口之后，将外绝缘膜15设置在整个金属壳体1的外侧，可以为整个金属壳体1提供绝缘保护，保证设备使用安全。
在一实施例中，参照图14，包边焊接封口方式，包括：在金属壳体1的第一直线6的相对边上包裹一层包边；将包边焊接在金属壳体1的第一直线6的相对边上，实现对第一容纳腔进行封口。
作为一示例，包边焊接封口方式中，先在金属壳体1的第一直线6的相对边上包裹一层包边，使包边包住第一容纳腔的开口，然后使用激光焊接将包边焊接在金属壳体1的第一直线6的相对边上，从而实现对第一容纳腔进行封口，保证封口密封效果。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (15)

  1. 一种金属壳体，其特征在于，包括由基板沿第一直线对折分别形成的第一壳体和第二壳体；
    所述第一壳体呈平板状；
    所述第二壳体设置有间隔排布的第一容纳槽和第二容纳槽，所述第一容纳槽和所述第二容纳槽均朝向远离所述第一壳体的方向凹陷；
    所述第一壳体的一侧表面和所述第二壳体的一侧表面相对设置，所述第一壳体和所述第二壳体的外边沿通过焊接密封固定连接，使得所述第一壳体封闭所述第一容纳槽和第二容纳槽，所述第一容纳槽用于容纳极芯；
    所述第一容纳槽的容积大于或等于所述第二容纳槽的容积。
  2. 根据权利要求1所述的金属壳体，其特征在于，所述第一容纳槽靠近第一直线，所述第二容纳槽位于所述第一容纳槽远离所述第一直线的一侧；
    所述第二壳体设置有开口朝外的第一凹槽和第二凹槽，所述第一凹槽连通所述第二容纳槽，所述第二凹槽连通所述第二容纳槽；
    所述第一凹槽和所述第二凹槽分别用于置入电池的正极盖板组件和负极盖板组件。
  3. 根据权利要求2所述的金属壳体，其特征在于，还包括第一裁剪片和第二裁剪片，所述第一裁剪片和所述第一壳体一体成型，所述第一裁剪片设置于所述第一壳体的远离所述第一直线的一侧；
    所述第二裁剪片和所述第二壳体一体成型，所述第二裁剪片设置于所述第二壳体的远离所述第一直线的一侧。
  4. 根据权利要求1所述的金属壳体，其特征在于，所述第一容纳槽的长度和所述第二容纳槽的长度相同；
    第一容纳槽的截面积与第二容纳槽的截面积之比：1:0.05至1：0.5；
    所述第一容纳槽的深度大于或等于所述第二容纳槽的深度；
    所述第一容纳槽的深度为5-40mm；
    所述第二容纳槽的深度为2-20mm。
  5. 根据权利要求1所述的金属壳体，其特征在于，所述第一容纳槽和所述第二容纳槽的间距为X，所述第一容纳槽的深度为H，3H≥X≥0.5H。
  6. 根据权利要求1所述的金属壳体，其特征在于，所述基板厚度为0.1-0.4mm。
  7. 一种电池，其特征在于，包括极芯、盖板组件和如权利要求1-6任一项所述的金属壳体，所述极芯与所述盖板组件连接，所述金属壳体包括容纳部和存储部，所述容纳部设置有第一容纳腔和第二容纳腔，所述第一容纳腔用于容纳所述极芯，所述第一容纳腔由所述第一壳体封闭所述第一容纳槽形成，所述第二容纳腔设置于所述第一容纳腔的一端，且所述第二容纳腔与所述第一容纳腔连通，所述第二容纳腔用于容纳所述盖板组件；所述存储部包括用于存储电解液或气体的气袋和用于注液的注液边沿，所述气袋由所述第一壳体封闭所述第二容纳槽形成，所述气袋设置于所述第一容纳腔的一侧，且与所述第一容纳腔连通； 所述气袋远离所述第一容纳腔的一侧设置有封口端。
  8. 根据权利要求7所述的电池，其特征在于，所述第一容纳腔的容积为V1，所述气袋的容积为V2，
    V1：V2的范围为1:(0.05～0.5)。
  9. 根据权利要求7所述的电池，其特征在于，沿远离所述第一容纳槽的方向，所述第二容纳槽靠近所述第一容纳槽的一侧的侧面与另一所述壳体本体之间的间距逐渐增大。
  10. 根据权利要求7所述的电池，其特征在于，在第一方向上，所述第一容纳槽的长度为L1，所述第二容纳槽的长度为L2，L2≤L1，L2：L1的范围为(0.1～1.0)：1。
  11. 根据权利要求7所述的电池，其特征在于，所述金属壳体朝向所述极芯的内表面设置有内绝缘膜，所述内绝缘膜设置在所述金属壳体与所述极芯之间，且所述内绝缘膜包覆所述极芯；
    所述金属壳体背离所述极芯的外表面设置有外绝缘膜，所述外绝缘膜包覆所述金属壳体的外周。
  12. 一种权利要求7-11任意一项所述的电池制作方法，其特征在于，包括：
    将盖板组件与电池极芯的极耳相接；
    将电池极芯放置在金属壳体的第一容纳槽，并使所述盖板组件放置在与所述第一容纳槽连通的盖板安装位上；
    沿第一直线弯折金属壳体，以使所述金属壳体的第一容纳槽形成第一容纳腔，所述电池壳体的第二容纳槽形成气袋；
    焊接所述金属壳体的两个第一侧面，对第一容纳腔进行注液；
    焊接所述金属壳体第一侧边相对的一侧面，对第一容纳腔进行化成；
    切去气袋，对第一容纳腔进行抽真空；
    对第一容纳腔进行封口。
  13. 根据权利要求12所述的电池制作方法，其特征在于，在所述对第一容纳腔进行封口之前，所述电池制作方法还包括：
    在金属壳体的所述第一直线的相对边上预留散热翅片。
  14. 根据权利要求12所述的电池制作方法，其特征在于，所述对第一容纳腔进行封口包括直接焊接封口方式、包边焊接封口方式和双重卷封封口方式中的任一种封口方式。
  15. 根据权利要求14所述的电池制作方法，其特征在于，所述包边焊接封口方式，包括：
    在所述金属壳体的第一直线的相对边上包裹一层包边；
    将包边焊接在所述金属壳体的第一直线的相对边上，实现对容置腔进行封口。
PCT/CN2024/101840 2023-12-05 2024-06-27 一种金属壳体及电池、电池的制备方法 Pending WO2025118564A1 (zh)

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