Insulating protective sleeve for battery, and battery

Abstract

An insulating protective sleeve (100) for a battery cell, and a battery. The insulating protective sleeve (100) for a battery cell comprises: a first insulating portion (10) and a second insulating portion (20), which are arranged opposite each other; a first connection portion (30) and a second connection portion (40), which are arranged opposite each other; a third insulating portion (50); and two folding portions (60), wherein the first insulating portion (10), the second insulating portion (20), the third insulating portion (50), the first connection portion (30) and the second connection portion (40) enclose an accommodating cavity; and the two folding portions (60) are integrally connected to the third insulating portion (50).

Description

Battery insulation protective cover and battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 22, 2024, with application number 202420331226.9. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery insulating protective cover and a battery. Background Art

[0003] Lithium batteries are widely used in industries such as automobiles, electronics, and energy storage systems. They offer advantages such as compact size, high energy density, long service life, and environmental friendliness. The battery core pack is located inside the battery. Related technologies use a thin film to cover the core pack, effectively isolating it from the aluminum shell and preventing electrochemical corrosion. SUMMARY OF THE INVENTION

[0004] However, this coating method still leaves gaps, resulting in a lack of isolation between the core package and the shell, leading to electrochemical corrosion of the aluminum shell.

[0005] In a first aspect, the present application provides a battery cell insulation protective cover, comprising:

[0006] a first insulating portion and a second insulating portion disposed opposite to each other;

[0007] The first connecting portion and the second connecting portion are arranged opposite to each other, connecting the first insulating portion and the second insulating portion respectively;

[0008] a third insulating portion, connected to the first insulating portion, the second insulating portion, the first connecting portion, and the second connecting portion, respectively, wherein the first insulating portion, the second insulating portion, the third insulating portion, the first connecting portion, and the second connecting portion enclose a receiving cavity, and the battery cell is received in the receiving cavity; and

[0009] The two folded portions are integrally connected to the third insulating portion and are respectively connected to the first connecting portion and the second connecting portion at a side away from the battery core.

[0010] In a second aspect, the present application provides a battery, comprising:

[0011] shell;

[0012] The battery cell is located in the housing;

[0013] The battery cell insulating protective cover covers the battery cell and is located between the battery cell and the outer shell. Beneficial effects

[0014] The battery cell insulating protective cover provided in the present application includes at least the following beneficial effects: the folding portion can be folded to fit together with the side of the first connecting portion and the second connecting portion away from the battery cell, partially covering the first connecting portion and the second connecting portion, preventing the electrochemical substances in the battery cell from overflowing from the corners of the battery cell insulating protective cover, thereby greatly isolating the outer shell and the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic structural diagram of a battery cell insulating protective cover provided in one embodiment of the present application;

[0016] FIG2 is another schematic structural diagram of a battery cell insulation protective cover provided by one embodiment of the present application;

[0017] FIG3 is a schematic diagram of the expanded structure of a battery cell insulation protective cover provided in one embodiment of the present application;

[0018] FIG4 is a schematic structural diagram of a battery cell insulating protective cover provided by another embodiment of the present application;

[0019] FIG5 is a top view of a battery cell insulating protective cover provided by another embodiment of the present application;

[0020] FIG6 is a schematic diagram of the expanded structure of a battery cell insulation protective cover provided by another embodiment of the present application;

[0021] FIG7 is a schematic structural diagram of a battery cell insulating protective cover provided in another embodiment of the present application;

[0022] FIG8 is another structural schematic diagram of a battery cell insulating protective cover provided in yet another embodiment of the present application;

[0023] FIG9 is a schematic diagram of the expanded structure of an insulating protective cover for a battery cell provided in another embodiment of the present application.

[0024] Description of reference numerals:

[0025] 100, battery cell insulating protective cover; 10, first insulating part; 20, second insulating part; 30, first connecting part; 301, first folding part; 302, second folding part; 40, second connecting part; 401, third folding part; 402, fourth folding part; 50, third insulating part; 60, folding part; 601, first sub-part; 602, second sub-part; 603, third sub-part; 401A, fifth folding part; 402A, sixth folding part; 60A, bottom support plate. Modes for Carrying Out the Invention

[0026] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0029] Example 1

[0030] Referring to FIG. 1 to FIG. 3 , the present application provides a battery cell insulation protective cover 100 , comprising:

[0031] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0032] The first connecting portion 30 and the second connecting portion 40 are arranged opposite to each other and respectively connect the first insulating portion 10 and the second insulating portion 20;

[0033] The third insulating portion 50 is connected to the first insulating portion 10, the second insulating portion 20, the first connecting portion 30, and the second connecting portion 40, respectively. The first insulating portion 10, the second insulating portion 20, the third insulating portion 50, the first connecting portion 30, and the second connecting portion 40 are enclosed to form a receiving cavity, and the battery cell is received in the receiving cavity;

[0034] The two folded portions 60 are integrally connected to the third insulating portion 50 and are respectively connected to the first connecting portion 30 and the second connecting portion 40 on a side away from the battery cell.

[0035] The cell insulating protective sleeve 100 is configured to, for example, encase a rectangular battery cell to isolate the cell from the outer casing, thereby preventing electrochemical reactions in the cell or corrosion of the outer casing by substances, which could affect the battery's lifespan and performance. The cell insulating protective sleeve 100 can be made, for example, of polypropylene (PP) or polyethylene terephthalate (PET).

[0036] Please refer to Figure 2. The first insulating part 10, the second insulating part 20, the first connecting part 30 and the second connecting part 40 are enclosed to form a square accommodating cavity, one side of which is an opening. The battery cell is placed in the accommodating cavity through the opening. The battery cell and the battery cell insulating protective cover 100 are placed together in the outer shell. The battery cell insulating protective cover 100 can prevent the electrochemical reaction of the battery cell or the substances produced by it from corroding the outer shell.

[0037] Please refer to Figure 2. The folded portion 60 is connected to the third insulating portion 50 and covers one end of the first connecting portion 30 or the second connecting portion 40 facing the third insulating portion 50. The folded portion 60 is attached to the side of the first connecting portion 30 or the second connecting portion 40 away from the battery cell, that is, it covers the connection between the first connecting portion 30 or the second connecting portion 40 and the third insulating portion 50, ensuring that there is no gap at the corners of the connection, so as to seal the gap on the battery cell insulating protective cover 100 where electrochemical substances overflow, reduce the impact of leakage of electrochemical reactions or substances produced by them on the outer shell, that is, the battery cell insulating protective cover 100 isolates the battery cell and the outer shell, and prevents the outer shell from being corroded.

[0038] The side of the battery cell insulating protective cover 100 facing the battery cell is, for example, adhesive, and the battery cell insulating protective cover 100 is adhered to the battery cell by adhesive to ensure that the battery cell insulating protective cover 100 is not easy to fall off the battery cell, isolate the battery cell and the shell, and prevent the shell from being corroded.

[0039] Please refer to Figures 2 to 3. In one embodiment of the present application, the first connecting portion 30 includes a first folding portion 301 and a second folding portion 302. The first folding portion 301 is vertically connected to the first insulating portion 10, and the second folding portion 302 is vertically connected to the second insulating portion 20. The first folding portion 301 and the second folding portion 302 are connected along the first direction X, wherein the first folding portion 301 and the second folding portion 302 are located on the same side of the first insulating portion 10 and the second insulating portion 20, and one of the two folding portions 60 is attached to and connected to the first folding portion 301 and the second folding portion 302.

[0040] The second connecting portion 40 includes a third folding portion 401 and a fourth folding portion 402. The third folding portion 401 is vertically connected to the side of the first insulating portion 10 away from the first folding portion 301, and the fourth folding portion 402 is vertically connected to the side of the second insulating portion 20 away from the second folding portion 302. The third folding portion 401 and the fourth folding portion 402 are connected along the first direction X; the other of the two folding portions 60 is attached to and connected to the third folding portion 401 and the fourth folding portion 402.

[0041] The first folded portion 301 is bent 90° between the first insulating portion 10 or the second insulating portion 20, for example, and bonded to the second folded portion 302 along the first direction X to form a flat surface. The second folded portion 302 is bent 90° between the first insulating portion 10 or the second insulating portion 20, for example, and bonded to the first folded portion 301 along the first direction X to form a flat surface, enclosing a partially symmetrical receiving cavity. The first folded portion 301 and the second folded portion 302 are bonded together to form the first connecting portion 30.

[0042] 2 and 3 , in one embodiment of the present application, the first folded portion 301 and the third folded portion 401 extend from the first insulating portion 10 along the first direction X toward the second insulating portion 20, and the second folded portion 302 and the fourth folded portion 402 extend from the second insulating portion 20 along the first direction X toward the first insulating portion 10. The first folded portion 301, the third folded portion 401, the second folded portion 302, and the fourth folded portion 402 all have a first length L1.

[0043] The folded portion 60 extends in the second direction Y and has a second length L2 in the second direction Y, wherein the second length L2 is smaller than the first length L1 .

[0044] Please refer to Figure 3. The distance between the first insulating portion 10 and the second insulating portion 20 of the third insulating portion 50 along the first direction X is a third length L3. The sum of the lengths of the connection between the first folded portion 301 and the second folded portion 302 is equal to the third length L3. That is, the length of the first connecting portion 30 between the second insulating portion 20 and the first insulating portion 10 is equal to the third length L3.

[0045] In one embodiment of the present application, the first folding portion 301 and the second folding portion 302 are bonded on opposite sides but do not overlap, and the sum of the lengths of the first folding portion 301 and the second folding portion 302 after bonding along the first direction X is equal to the third length L3 of the third insulating portion 50, and the ratio between the first length L1 of the first folding portion 301, the first length L1 of the second folding portion 302, and the third length L3 is, for example, 1:1:2.

[0046] In another embodiment of the present application, the first folding portion 301 and the second folding portion 302 are partially overlapped or fully overlapped and connected toward one side of the battery cell. The length of the first connecting portion 30 formed by the partial or full overlap of the first folding portion 301 and the second folding portion 302 extending along the first direction X is equal to the third length L3. The ratio between the first length L1 of the first folding portion 301 and the first length L1 and the third length L3 of the second folding portion 302 is, for example, (6-10): (6-10): 10.

[0047] The partial overlap between the first folding portion 301 and the second folding portion 302 may be, for example, 5 mm to 20 mm.

[0048] Please refer to Figures 1 to 3. In one embodiment of the present application, the second connecting portion 40 includes a third folding portion 401 and a fourth folding portion 402. The third folding portion 401 is vertically connected to a side of the first insulating portion 10 away from the first folding portion 301, and the fourth folding portion 402 is vertically connected to a side of the second insulating portion 20 away from the second folding portion 302. The third folding portion 401 and the fourth folding portion 402 are connected along the first direction X, wherein the third folding portion 401 and the fourth folding portion 402 are located on the same side of the first insulating portion 10 and the second insulating portion 20, one of the two folding portions 60 is adhered to and connected to the first folding portion 301 and the second folding portion 302, and the other is adhered to and connected to the third folding portion 401 and the fourth folding portion 402.

[0049] The third folded portion 401 is bent 90° between the first insulating portion 10 or the second insulating portion 20, for example, and bonded to the fourth folded portion 402. The fourth folded portion 402 is bent 90° between the first insulating portion 10 or the second insulating portion 20, for example, and bonded to the third folded portion 401 to form a flat surface, thereby enclosing another symmetrical portion of the receiving cavity. The third folded portion 401 and the fourth folded portion 402 are bonded together to form the second connecting portion 40.

[0050] 3 , in one embodiment of the present application, the first folded portion 301 and the third folded portion 401 extend from the first insulating portion 10 along the first direction X toward the second insulating portion 20 , and the second folded portion 302 and the fourth folded portion 402 extend from the second insulating portion 20 along the first direction X toward the first insulating portion 10 . The first folded portion 301 , the third folded portion 401 , the second folded portion 302 , and the fourth folded portion 402 all have a first length L1 .

[0051] The folded portion 60 extends in the second direction Y and has a second length L2 in the second direction Y, wherein the second length L2 is smaller than the first length L1 .

[0052] In some embodiments of the present application, the ratio between the second length and the first length is (2-8):10.

[0053] The distance between the third insulating portion 50 and the second insulating portion 20 along the first direction X is a third length L3, and the sum of the lengths of the connection between the third folding portion 401 and the fourth folding portion 402 is equal to the third length L3, that is, the length of the second connecting portion 40 between the second insulating portion 20 and the first insulating portion 10 is equal to the third length L3.

[0054] In one embodiment of the present application, the third folding portion 401 and the fourth folding portion 402 are bonded to opposite sides but do not overlap. After the third folding portion 401 and the fourth folding portion 402 are bonded, the sum of the lengths extending along the first direction X toward the side close to the battery cell is equal to the third length L3. The ratio between the first length L1 of the third folding portion 401 and the first length L1 of the fourth folding portion 402 and the third length L3 is, for example, 1:1:2.

[0055] In another embodiment of the application, the third folding portion 401 and the fourth folding portion 402 are partially overlapped or fully overlapped and connected toward one side of the battery cell, and the sum of the lengths of the third folding portion 401 and the fourth folding portion 402 extending along the first direction X toward the side close to the battery cell after partial overlap or full overlap is equal to the third length L3, that is, the length of the second connecting portion 40 between the second insulating portion 20 and the first insulating portion 10 is equal to the third length L3, that is, the ratio between the first length L1 of the third folding portion 401 and the first length L1 of the fourth folding portion 402 and the third length L3 is, for example, (6-10): (6-10): 10.

[0056] The partial overlap between the third folding portion 401 and the fourth folding portion 402 may be, for example, 5 mm to 20 mm.

[0057] In addition, the distance between the third insulating portion 50 and the second insulating portion 20 along the first insulating portion 10 is a third length L3 , and the ratio of the third length L3 to the first length L1 is 10:(5−10).

[0058] In one embodiment of the present application, the distance of the third insulating portion 50 along the first direction X is a third length L3, and the ratio of the third length L3 to the first length L1 is 10:(5-10), so that the battery cell insulating protective cover 100 is easy to fold and saves costs to a certain extent.

[0059] In one embodiment of the present application, the third insulating portion 50 is integrally formed with the first insulating portion 10, the second insulating portion 20 and the folding portion 60, the first folding portion 301 and the third folding portion 401 are respectively integrally formed with the first insulating portion 10, and the second folding portion 302 and the fourth folding portion 402 are respectively integrally formed with the second insulating portion 20.

[0060] Please refer to Figure 3. In one embodiment of the present application, the folding portion 60 includes an integrally formed first sub-portion 601, a second sub-portion 602 and a third sub-portion 603. The second sub-portion 602 is connected to one side of the third insulating portion 50 and is adhered to the first connecting portion 30 or the second connecting portion 40 along the second direction Y. The first sub-portion 601 and the third sub-portion 603 are respectively arranged on both sides of the second sub-portion 602. One of the first sub-portion 601 and the third sub-portion 603 is adhered to the first folding portion 301 or the third folding portion 401, and the side of one of the first sub-portion 601 and the third sub-portion 603 away from the first folding portion 301 or the third folding portion 401 is also adhered to the second sub-portion 602.

[0061] The other of the first sub-section 601 and the third sub-section 603 is closely connected to the second folding section 302 or the fourth folding section 402, and the side of the other of the first sub-section 601 and the third sub-section 603 away from the second folding section 302 or the fourth folding section 402 is also closely connected to the second sub-section 602.

[0062] Among them, the connection between the first sub-section 601 and the third sub-section 603 and the second sub-section 602 has a fold A, which is convenient for bending the battery cell insulation protection cover 100 into shape. The fold A forms an acute angle α with the side of the second sub-section 602 close to the third insulating section 50, wherein 45°≤α≤60°.

[0063] When unfolded, the folding portion 60 is, for example, rectangular, and the second sub-portion 602 is, for example, trapezoidal, with the two included angles of the trapezoid being, for example, an acute angle α. The first sub-portion 601 and the third sub-portion 603 are triangular, and together with the trapezoidal second sub-portion 602, form the rectangular folding portion 60. A fold A forms an acute angle α with the side of the second sub-portion 602 near the third insulating portion 50. This angle setting ensures that the two folds A do not intersect on the side away from the third insulating portion 50, preventing uneven overlap on the side of the folding portion 60 away from the third insulating portion 50 during folding. This could result in poor folding during the folding process of the battery cell insulating protective cover 100, thereby affecting the performance of the battery cell insulating protective cover 100. This fold A is a pre-fold, meaning that it can be processed, for example, during the factory processing stage, to facilitate subsequent folding.

[0064] In one embodiment, the first folding portion 301 and the second folding portion 302 may be glued together on the side away from the battery cell, and the third folding portion 401 and the fourth folding portion 402 may be glued together on the side away from the battery cell.

[0065] Example 2

[0066] Referring to FIG. 4 to FIG. 6 , the present application provides a battery cell insulating protective cover 100 , comprising:

[0067] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0068] The first connecting portion 30 and the second connecting portion 40 are arranged opposite to each other, connecting the first insulating portion 10 and the second insulating portion 20 respectively. The second connecting portion 40 includes a fifth folded portion 401A and a sixth folded portion 402A connected to each other along the first direction X. One of the fifth folded portion 401A and the sixth folded portion 402A is connected to the first insulating portion 10, and the other is connected to the second insulating portion 20.

[0069] The third insulating portion 50 is provided on the same side of the first insulating portion 10, the second insulating portion 20, the first connecting portion 30, and the second connecting portion 40, wherein the first insulating portion 10, the second insulating portion 20, the first connecting portion 30, the second connecting portion 40, and the third insulating portion 50 enclose a receiving cavity, and the battery cell is received in the receiving cavity;

[0070] The bottom support plate 60A is thermally connected to a side of the third insulating portion 50 away from the battery cell.

[0071] The cell insulating protective cover 100 is configured to, for example, encase a rectangular battery cell to isolate the cell from the outer casing, preventing electrochemical reactions within the cell or corrosion of the outer casing, which could affect the battery's lifespan and performance. The cell insulating protective cover 100 can be made of, but is not limited to, polypropylene (PP) or polyethylene terephthalate (PET).

[0072] Please refer to Figure 4. The first insulating part 10, the second insulating part 20, the first connecting part 30, the second connecting part 40, the third insulating part 50 and the bottom support plate 60A are enclosed to form a square accommodating cavity, one side of which is an opening. The battery cell is placed in the accommodating cavity through the opening, and the battery cell and the battery cell insulating protective cover 100 are placed together in the outer shell to prevent the electrochemical reaction of the battery cell or its substances from corroding the outer shell.

[0073] The third insulating part 50 is folded toward the side close to the battery cell, and the bottom support plate 60A is provided on the side of the third insulating part 50 away from the battery cell. The third insulating part 50 is attached to the bottom of the part connected to the battery cell. The connection with the bottom support plate 60A ensures that the electrochemical substances will not overflow from the bottom corners of the battery cell insulating protective cover 100 and contact the outer shell, thereby completely isolating the contact between the battery cell and the outer shell.

[0074] The side of the battery cell insulating protective cover 100 facing the battery cell is, for example, adhesive, and the battery cell insulating protective cover 100 is adhered to the battery cell by adhesive to ensure that the battery cell insulating protective cover 100 is not easy to fall off from the battery cell and isolate the battery cell and the shell.

[0075] The bottom support plate 60A may be made of, for example, polypropylene (PP) or polyethylene terephthalate (PET).

[0076] Please refer to FIG. 6 . In one embodiment of the present application, the first connection portion 30 has a first length L1 along the first direction X.

[0077] The third insulating portion 50 has a second length L2 along the first direction X, which is less than or equal to the first length L1. The third insulating portion 50 and the bottom support plate 60A cooperate to prevent electrochemical substances in the battery cell from overflowing from corners and corroding the outer shell.

[0078] In one embodiment of the present application, the ratio of the second length L2 to the first length L1 is (1-10):10, that is, the orthographic projection of the third insulating portion 50 on the battery cell partially covers the bottom of the battery cell or completely covers the bottom of the battery cell, which depends on actual application.

[0079] In one embodiment of the present application, the fifth folding portion 401A extends along the first direction X, the sixth folding portion 402A extends along the first direction X, and the fifth folding portion 401A and the sixth folding portion 402A both have a third length L3 along the first direction X. The ratio of the third length L3 to the first length L1 is (5-10):10.

[0080] Please refer to Figure 4. The fifth folding portion 401A is bent 90° between the first insulating portion 10 and is connected to the sixth folding portion 402A. The sixth folding portion 402A is bent 90° between the second insulating portion 20 and is connected to the fifth folding portion 401A. The sixth folding portion 402A and the fifth folding portion 401A can, for example, partially overlap or completely overlap. After overlapping, the orthographic projection area on the battery cell is equal to the orthographic projection area of ​​the first connecting portion 30 on the battery cell. The third insulating portion 50 and the bottom support plate 60A are arranged at an opening of the accommodating cavity to support the battery cell and isolate the battery cell and the shell to prevent electrochemical substances from corroding the shell.

[0081] In one embodiment of the present application, the fifth folding portion 401A and the sixth folding portion 402A are adhered but do not overlap. The sum of the lengths of the fifth folding portion 401A and the sixth folding portion 402A extending along the first direction X after being adhered is equal to the first length L1, and the ratio between the third length L3 of the fifth folding portion 401A, the third length L3 of the sixth folding portion 402A and the first length L1 is 1:1:2.

[0082] In another embodiment of the present application, the fifth folding portion 401A and the sixth folding portion 402A partially overlap or fully overlap, and the sum of the lengths extending toward one side of the first insulating portion 10 or the second insulating portion after the partial or full overlap is equal to the first length L1, and the ratio between the third length L3 of the fifth folding portion 401A, the third length L3 of the sixth folding portion 402A, and the first length L1 is (6-10):(6-10):10.

[0083] In one embodiment of the present application, the first connecting portion 30 is integrally formed with the first insulating portion 10, the second insulating portion 20 and the third insulating portion 50, the fifth folding portion 401A is integrally formed with the third insulating portion 50 and the first insulating portion 10, and the sixth folding portion 402A is integrally formed with the third insulating portion 50 and the second insulating portion 20.

[0084] In one embodiment of the present application, any connection between the first insulating portion 10, the second insulating portion 20, the first connecting portion 30, the second connecting portion 40, and the third insulating portion 50 has a fold B. The fold B is a pre-fold, that is, the fold B can be processed in advance during the factory processing stage, for example, to facilitate subsequent folding and forming.

[0085] Example 3

[0086] Referring to FIG. 7 to FIG. 9 , in a third aspect, the present application provides a battery cell insulating protective cover 100 , comprising:

[0087] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0088] The first connecting portion 30 and the second connecting portion 40 are arranged opposite to each other and respectively connect the first insulating portion 10 and the second insulating portion 20;

[0089] The third insulating portion 50 is connected to the first insulating portion 10, the second insulating portion 20, the first connecting portion 30, and the second connecting portion 40, respectively. The first insulating portion 10, the second insulating portion 20, the third insulating portion 50, the first connecting portion 30, and the second connecting portion 40 are enclosed to form a receiving cavity, and the battery cell is received in the receiving cavity;

[0090] The two folding parts 60 are connected to the first insulating part 10, the second insulating part 20, the first connecting part 30 and the second connecting part 40. The two folding parts 60 are connected to the battery cell along the second direction Y, and the side of the folding part 60 away from the battery cell is connected to the first connecting part 30 or the second connecting part 40.

[0091] In one embodiment, the first connecting portion 30 includes a first folding portion 301 and a second folding portion 302, wherein the first folding portion 301 is vertically connected to the first insulating portion 10, and the second folding portion 302 is vertically connected to the second insulating portion 20, and the first folding portion 301 and the second folding portion 302 are connected along the first direction X;

[0092] The second connecting portion 40 includes a third folding portion 401 and a fourth folding portion 402, the third folding portion 401 is vertically connected to the side of the first insulating portion 10 away from the first folding portion 301, the fourth folding portion 402 is vertically connected to the side of the second insulating portion 20 away from the second folding portion 302, and the third folding portion 401 and the fourth folding portion 402 are connected along the first direction X.

[0093] In one embodiment, the battery cell insulating protective cover 100 of the third embodiment has substantially the same structure as the battery cell insulating protective cover 100 of the first embodiment, with the difference being that one side of the folded portion 60 of the third embodiment is attached to the battery cell, and the other side is attached to the oppositely disposed first connecting portion 30 or second connecting portion 40, whereas the folded portion 60 of the first embodiment is not attached to the battery cell, but is attached only to the side of the oppositely disposed first connecting portion 30 or second connecting portion 40 away from the battery cell. A fold C is provided on each of the first folded portion 301, the second folded portion 302, the third folded portion 401, and the fourth folded portion 402 of the third embodiment. The fold C extends from the angles of the first folded portion 301, the second folded portion 302, the third folded portion 401, and the fourth folded portion 402 near the third insulating portion 50 at an acute angle α. The angle between the fold C and the third insulating portion 50 is, for example, 45°.

[0094] During the molding process of the battery cell insulation protective cover 100, the first insulating portion 10 and the second insulating portion 20 are folded 90° and arranged opposite to each other, the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 are folded 90° to the side away from the battery cell, and based on the fold C on the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402, the two folding portions 60 are located on the side of part of the battery cell and are arranged opposite to each other, the first folding portion 301, the second folding portion 302 The portion where the third folded portion 401 and the fourth folded portion 402 connect with the two folded portions 60 is triangular. Subsequently, the first folded portion 301, the second folded portion 302, the third folded portion 401, and the fourth folded portion 402 are folded 90° again and attached to the side of the two folded portions 60 away from the battery cell to form a receiving cavity. The folded portion 60 cooperates with the first folded portion 301, the second folded portion 302, the third folded portion 401, and the fourth folded portion 402 to cover the corners of the battery cell to prevent electrochemical substances from overflowing from the corners and corroding the casing. For other structures, please refer to Example 1 and will not be described in detail here.

[0095] When the battery cell insulation protection cover is formed, for example, gluing or hot-melt connection is adopted; that is, the battery cell insulation protection cover 100 is glued on the side facing the battery cell, and the battery cell insulation protection cover 100 is bonded to the battery cell.

[0096] The present application also provides a battery, comprising:

[0097] shell;

[0098] The battery cell is located in the housing;

[0099] As in any one of the battery cell insulation protection sleeves of Embodiment 1, Embodiment 2 or Embodiment 3, the battery cell insulation protection sleeve covers the battery cell and is located between the battery cell and the outer shell.

Claims

1. A battery core insulation protective cover, comprising: A first insulating portion (10) and a second insulating portion (20) arranged opposite to each other; A first connecting portion (30) and a second connecting portion (40) are arranged opposite to each other and respectively connect the first insulating portion (10) and the second insulating portion (20); a third insulating portion (50) connected to the first insulating portion (10), the second insulating portion (20), the first connecting portion (30) and the second connecting portion (40), respectively, wherein the first insulating portion (10), the second insulating portion (20), the third insulating portion (50), the first connecting portion (30) and the second connecting portion (40) enclose a receiving cavity, and the battery cell is received in the receiving cavity; and The two folded portions (60) are integrally connected to the third insulating portion (50) and are respectively connected to the first connecting portion (30) and the second connecting portion (40) on a side away from the battery core.

2. The battery core insulating protective cover according to claim 1, wherein: The first connecting portion (30) includes a first folding portion (301) and a second folding portion (302), wherein the first folding portion (301) is vertically connected to the first insulating portion (10), and the second folding portion (302) is vertically connected to the second insulating portion (20), and the first folding portion (301) and the second folding portion (302) are connected along a first direction; The second connecting portion (40) includes a third folding portion (401) and a fourth folding portion (402), wherein the third folding portion (401) is vertically connected to a side of the first insulating portion (10) away from the first folding portion (301), and the fourth folding portion (402) is vertically connected to a side of the second insulating portion (20) away from the second folding portion (302), and the third folding portion (401) and the fourth folding portion (402) are connected along the first direction; One of the two folding portions (60) is attached to and connected with the first folding portion (301) and the second folding portion (302), and the other is attached to and connected with the third folding portion (401) and the fourth folding portion (402).

3. The battery core insulating protective cover according to claim 2, wherein: The first folding portion (301) and the second folding portion (302) partially overlap or completely overlap; the third folding portion (401) and the fourth folding portion (402) partially overlap or completely overlap.

4. The battery core insulating protective cover according to claim 3, wherein: The first folded portion (301) and the third folded portion (401) extend from the first insulating portion (10) along the first direction toward the second insulating portion (20), the second folded portion (302) and the fourth folded portion (402) extend from the second insulating portion (20) along the first direction toward the first insulating portion (10), and the first folded portion (301), the third folded portion (401), the second folded portion (302), and the fourth folded portion (402) all have a first length; The folded portion (60) extends in a second direction and has a second length in the second direction, wherein the second length is smaller than the first length.

5. The battery core insulating protective cover according to claim 4, wherein: The ratio of the second length to the first length is (2-8):

10.

6. The battery core insulating protective cover according to claim 4, wherein: The distance of the third insulating portion (50) along the first direction is a third length, and the ratio of the third length to the first length is 10:(5-10).

7. The battery core insulating protective cover according to any one of claims 2 to 6, wherein: The third insulating portion (50) is integrally formed with the first insulating portion (10), the second insulating portion (20) and the folding portion (60); the first folding portion (301) and the third folding portion (401) are respectively integrally formed with the first insulating portion (10); and the second folding portion (302) and the fourth folding portion (402) are respectively integrally formed with the second insulating portion (20).

8. The battery core insulating protective cover according to any one of claims 4 to 6, wherein: The folding portion (60) comprises an integrally formed first sub-portion (601), a second sub-portion (602), and a third sub-portion (603); the second sub-portion (602) is connected to one side of the third insulating portion (50) and is bonded to the first connecting portion (30) or the second connecting portion (40) along the second direction; the first sub-portion (601) and the third sub-portion (603) are respectively provided on both sides of the second sub-portion (602); One of the first sub-portion (601) and the third sub-portion (603) is closely connected to the first folding portion (301) or the third folding portion (401), and one of the first sub-portion (601) and the third sub-portion (603) is closely connected to the second sub-portion (602) at a side away from the first folding portion (301) or the third folding portion (401); The other of the first sub-portion (601) and the third sub-portion (603) is closely connected to the second folded portion (302) or the fourth folded portion (402), and the side of the other of the first sub-portion (601) and the third sub-portion (603) away from the second folded portion (302) or the fourth folded portion (402) is also closely connected to the second sub-portion (602); The connection between the first sub-section (601), the third sub-section (603) and the second sub-section (602) has a fold, and the fold forms an acute angle α with the side of the second sub-section (602) close to the third insulating section (50), wherein 45°≤α≤60°.

9. A battery core insulation protective cover, comprising: A first insulating portion (10) and a second insulating portion (20) arranged opposite to each other; A first connecting portion (30) and a second connecting portion (40) are arranged opposite to each other, respectively connecting the first insulating portion (10) and the second insulating portion (20), wherein the second connecting portion (40) includes a fifth folding portion (401A) and a sixth folding portion (402A) connected to each other along a first direction, one of the fifth folding portion (401A) and the sixth folding portion (402A) being connected to the first insulating portion (10), and the other being connected to the second insulating portion (20); a third insulating portion (50) provided on the same side of the first insulating portion (10), the second insulating portion (20), the first connecting portion (30) and the second connecting portion (40), wherein the first insulating portion (10), the second insulating portion (20), the first connecting portion (30), the second connecting portion (40) and the third insulating portion (50) enclose a receiving cavity, and the battery cell is received in the receiving cavity; and The bottom support plate (60A) is thermally melt-connected to a side of the third insulating portion (50) away from the battery core.

10. The battery core insulating protective cover according to claim 9, wherein: The first connecting portion (30) has a first length along the first direction; The third insulating portion (50) has a second length along the first direction, and the second length is less than or equal to the first length.

11. The battery core insulating protective cover according to claim 10, wherein: The ratio of the second length to the first length is (1-10):

10.

12. The battery core insulating protective cover according to claim 10, wherein: The fifth folding portion (401A) extends along the first direction toward a side close to the sixth folding portion (402A), and the sixth folding portion (402A) extends along the first direction toward a side close to the fifth folding portion (401A). The fifth folding portion (401A) and the sixth folding portion (402A) both have a third length along the first direction, and a ratio between the third length and the first length is (5-10):

10.

13. The battery core insulating protective cover according to any one of claims 10 to 12, wherein: The first connecting portion (30) is integrally formed with the first insulating portion (10), the second insulating portion (20) and the third insulating portion (50); the fifth folding portion (401A) is integrally formed with the third insulating portion (50) and the first insulating portion (10); and the sixth folding portion (402A) is integrally formed with the third insulating portion (50) and the second insulating portion (20).

14. The battery core insulating protective cover according to any one of claims 1 to 13, wherein: The battery core insulating protective cover (100) is formed by hot-melt connection.

15. A battery comprising: shell; a battery cell, located in the housing; The battery core insulating protective cover (100) according to any one of claims 1 to 14, covers the battery core and is located between the battery core and the housing.

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