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KR-102963679-B1 - Battery cells, batteries, and electrical devices

KR102963679B1KR 102963679 B1KR102963679 B1KR 102963679B1KR-102963679-B1

Abstract

It is a battery cell (102), a battery (10), and an electric device. A battery cell (102) includes a housing (1022) and a cover (1021), and the housing (1022) has an opening (10221) and a void (10222) formed therein, and the housing (1022) includes an opening (10223) and a main body (10224), the opening (10223) surrounds the opening (10221), the main body (10224) surrounds the void (10222), and the cover (1021) is connected to the opening (10223) to close the opening (10221), wherein at least a portion of the main body (10224) is recessed relative to the opening (10223) to form a recessed area (10225), and the thickness of the recessed area (10225) is greater than the thickness of the opening (10223). By making the thickness of the opening (10223) relatively thick, the strength after joining of the opening (10223) and the cover (1021) is ensured, the risk of cracking and failure at the welding location of the cover (1021) and the housing (1022) is reduced or mitigated, the reliability of the battery cell (102) is improved, and the service life of the battery cell (102) can be extended.

Inventors

  • 리, 추완
  • 꾸어, 즈쥔
  • 레이, 위용
  • 왕, 펑
  • 차오, 멍카이

Assignees

  • 컨템포러리 엠퍼렉스 테크놀로지 (홍콩) 리미티드

Dates

Publication Date
20260511
Application Date
20230815
Priority Date
20230207

Claims (19)

  1. In the battery cell (102), Housing (1022) - an opening (10221) and a void (10222) are formed in the housing (1022), and the housing (1022) includes an opening (10223) and a main body (10224), the opening (10223) surrounds the opening (10221), and the main body (10224) surrounds the void (10222) - ; and A cover (1021) connected to the opening (10223) to close the opening (10221); Includes, Here, at least a portion of the main body (10224) is recessed with respect to the opening (10223) to form a recessed area (10225), and the thickness of the recessed area (10225) is smaller than the thickness of the opening (10223). The above-mentioned recessed area (10225) is located on the inner side adjacent to the empty space (10222) of the main body (10224) and is characterized by being recessed in a direction away from the empty space (10222).
  2. In paragraph 1, The thickness of the opening (10223) is increased compared to at least a portion of the main body (10224) to form the recessed area (10225); Alternatively, a battery cell (102) characterized in that the thickness of at least a portion of the main body (10224) is reduced compared to the opening (10223) to form the recessed area (10225).
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  4. In paragraph 1, The above-mentioned recessed area (10225) is located on the inner side adjacent to the void (10222) of the main body part (10224) and is recessed in a direction away from the void (10222). The battery cell (102) further comprises an electrode assembly (1026) installed within the empty space (10222), and a portion of the electrode assembly (1026) is accommodated in the recessed area (10225), characterized in that the battery cell (102).
  5. In paragraph 1, The above housing (1022) is a cylindrical structure having the opening (10221) at one end; Alternatively, the housing (1022) is a cylindrical structure having the opening (10221) at both ends, and the battery cell (102) includes two covers (1021), and each of the two covers (1021) is connected to two openings (10223) to close the corresponding openings (10221); Alternatively, the housing (1022) is a prismatic structure having the opening (10221) provided at one end; Alternatively, the housing (1022) is a prismatic structure having the opening (10221) at both ends, and the battery cell (102) includes two covers (1021), and each of the two covers (1021) is connected to two openings (10223) to close the opening (10221), characterized in that the battery cell (102).
  6. In paragraph 1, The housing (1022) includes a first side plate (10226), a second side plate (10227), a third side plate (10228), and a fourth side plate (10229) connected end to end, wherein the first side plate (10226) and the third side plate (10228) are installed parallel with a gap, and the second side plate (10227) and the fourth side plate (10229) are installed parallel with a gap, and the central regions of the first side plate (10226), the second side plate (10227), the third side plate (10228), and the fourth side plate (10229) together form the main body (10224), and the first side plate (10226), the second side plate (10227), the third side plate (10228), and the fourth The end regions of the side plate (10229) together form two of the openings (10223), and the battery cell (102) includes two of the covers (1021), and each of the two of the covers (1021) is connected to the two of the openings (10223) to close the corresponding openings (10221); A battery cell (102), characterized in that the area of the first side plate (10226) and the third side plate (10228) is larger than the area of the second side plate (10227) and the fourth side plate (10229), and the area forming the main body part (10224) of the first side plate (10226) and the third side plate (10228) is entirely recessed based on the opening (10223) to form one recessed area (10225) respectively.
  7. In paragraph 6, A battery cell (102) characterized in that the area forming the main body portion (10224) of the second side plate (10227) and the fourth side plate (10229) is entirely recessed based on the opening (10223) to form a single recessed area (10225).
  8. In Paragraph 7, The four recessed areas (10225) of the first side plate (10226), the second side plate (10227), the third side plate (10228), and the fourth side plate (10229) are connected; and/or, the four recessed areas (10225) of the first side plate (10226), the second side plate (10227), the third side plate (10228) and the fourth side plate (10229) are all located on the outer side far from the empty space (10222) of the main body part (10224), characterized in that the battery cell (102) is.
  9. In paragraph 1, The ratio of the thickness of the opening (10223) to the thickness of the recessed area (10225) is 65 to 100:1; and/or, a battery cell (102) characterized in that the ratio of the lengthwise dimension of the housing (1022) of the opening (10223) to the total lengthwise dimension of the housing (1022) is 1:50 to 100.
  10. In paragraph 1, A battery cell (102) characterized in that the above-mentioned recessed area (10225) is connected to an area adjacent to the above-mentioned recessed area (10225) via an arc-shaped transition.
  11. In Paragraph 10, A battery cell (102) characterized in that the ratio of the lengthwise dimension of the housing (1022) of the arc-shaped transition connecting portion to the lengthwise dimension of the housing (1022) of the recessed area (10225) is 0.5 to 5:100.
  12. In paragraph 1, Two openings (10221) are formed at both ends of the housing (1022), and the battery cell (102) includes two covers (1021), and each of the two covers (1021) is connected to two openings (10223) to close the corresponding openings (10221); Both of the two covers (1021) are welded to the housing (1022), and a positive terminal (1023) is installed on one of the two covers (1021), and a negative terminal (1024) is installed on the other of the two covers (1021); or, any one of the two covers (1021) is welded to the housing (1022) and has a positive terminal (1023) and a negative terminal (1024) installed, and the other of the two covers (1021) is formed integrally with the housing (1022); The battery cell (102) further comprises an electrode assembly (1026) installed in the empty chamber (10222), wherein the positive tab (10261) of the electrode assembly (1026) is electrically connected to the positive terminal (1023) and the negative tab of the electrode assembly (1026) is electrically connected to the negative terminal (1024).
  13. In the battery (10), Case(101); A battery cell (102) according to any one of paragraphs 1 to 2 and 4 to 12; A battery (10) comprising, wherein the battery cell (102) is installed in the case (101).
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  18. In electrical equipment, An electric device characterized by including a battery cell (102) according to any one of claims 1 to 2 and 4 to 12.
  19. In electrical equipment, An electric device characterized by including a battery (10) according to paragraph 13.

Description

Battery cells, batteries, and electrical devices Cross-reference regarding related applications This application claims priority to a Chinese patent application filed with the State Intellectual Property Administration of the People's Republic of China on February 7, 2023, with application number 202320187667.1 and application title ‘battery cell, battery and electrical equipment’, the entire contents of which are incorporated by reference into this application. This application relates to the field of battery technology, and more specifically, to battery cells, batteries, and electrical devices. With the advancement of new energy technologies, the applications of batteries are becoming increasingly widespread. For example, they are applied to terminal products such as mobile phones, laptops, battery-powered vehicles, electric vehicles, electric airplanes, electric ships, electric car toys, electric ship toys, electric airplane toys, and power tools. In the advancement of battery technology, battery reliability is a matter that cannot be ignored, in addition to the improvement of performance. If battery reliability is not guaranteed, it can directly affect the reliability of terminal products, operating costs, and user experience. Therefore, determining how to enhance battery reliability is a technical issue that must be urgently addressed in battery technology. To more clearly explain the technical solution of the embodiments of the present application, the drawings used in the embodiments or exemplary technical descriptions are briefly described below. The drawings described below are merely some embodiments of the present application, and it is evident that a person skilled in the art can obtain other drawings based on these drawings without creative effort. FIG. 1 is a schematic diagram of the structure of a vehicle according to some embodiments of the present application. FIG. 2 is an exploded view of a battery according to some embodiments of the present application. FIG. 3 is a schematic diagram of a partial structure of a battery according to some embodiments of the present application. FIG. 4 is a schematic diagram of a partial structure of a battery according to some embodiments of the present application. FIG. 5 is a schematic diagram of the structure of a battery cell according to some embodiments of the present application. FIG. 6 is a schematic exploded view of a battery cell according to some embodiments of the present application. FIG. 7 is a schematic diagram of the structure of a housing of a battery cell according to some embodiments of the present application. Figure 8 is an enlarged view of part A of the housing shown in Figure 7. FIG. 9 is a schematic diagram 2 of the structure of a housing of a battery cell according to some embodiment of the present application. Figure 10 is an enlarged view of part a of the housing shown in Figure 9. FIG. 11 is a cross-sectional view of the I-I' portion of the housing shown in FIG. 9. Figure 12 is a partial enlarged view of section b of the cross-sectional view shown in Figure 11. FIG. 13 is a schematic diagram of the structure of a housing of a battery cell according to some embodiments of the present application. FIG. 14 is a schematic diagram of the structure of a housing of a battery cell according to some embodiments of the present application. Fig. 15 is an enlarged view of part B of the housing shown in Fig. 14. FIG. 16 is a schematic diagram of the structure of a housing of a battery cell according to some embodiments of the present application. Figure 17 is an enlarged view of part C of the housing shown in Figure 16. FIG. 18 is a block diagram of a battery cell manufacturing facility according to some embodiments of the present application. To clarify the purpose, technical solution, and advantages of the embodiments of this application, the technical solution of the embodiments of this application will be clearly described below with reference to the drawings in the embodiments of this application. It is evident that the embodiments described herein are merely some embodiments, not all embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by a person skilled in the art without creative effort fall within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as generally understood by those skilled in the art to which this application applies. The terms used in the specification of this application are used merely to describe specific embodiments and are not intended to limit this application. In the specification, claims, and drawings of this application, terms such as “comprising” and “having,” and any variations thereof, are intended to describe non-exclusive inclusion. In the specification, claims, or drawings of this application, terms such as “first,” “second,” etc., are used to di