Battery cell insulation protective sleeve and battery

Abstract

The utility model provides a battery cell insulation protective sleeve and a battery. The battery cell insulation protective sleeve comprises a first insulation part and a second insulation part which are oppositely arranged, the first connecting part and the second connecting part are oppositely arranged and are respectively connected with the first insulating part and the second insulating part; the third insulating part is respectively connected with the first insulating part, the second insulating part, the first connecting part and the second connecting part, the first insulating part, the second insulating part, the third insulating part, the first connecting part and the second connecting part enclose to form an accommodating cavity, and the battery core is accommodated in the accommodating cavity; and the two folding parts are integrally connected with the third insulating part and are respectively connected with one sides, far away from the battery core, of the first connecting part and the second connecting part in a fitting manner. The folding part is attached to the sides, away from the battery cell, of the first connecting part and the second connecting part in a folding mode, the first connecting part and the second connecting part are partially wrapped in the folding part, electrochemical substances in the battery cell are prevented from overflowing from the corners of the battery cell insulation protective sleeve, and the shell and the battery cell are greatly isolated.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery cell insulating protective cover and a battery. Background Art

[0002] Lithium batteries are widely used in industries such as automobiles, electronic products, and energy storage systems. They have the advantages of small size, high energy density, long service life, and green environmental protection. The battery core pack is located inside the battery. The relevant technology uses a layer of film to cover the battery core pack to effectively isolate the core pack from the aluminum shell and prevent electrochemical corrosion of the aluminum shell. However, the coating method currently used in the relevant technology still has gaps, resulting in the core pack and the shell not being isolated, resulting in electrochemical corrosion of the aluminum shell. Utility Model Content

[0003] In view of this, the present application provides a battery cell insulating protective cover and a battery, wherein the battery cell insulating protective cover covers the battery cell in a gapless manner, isolates the battery cell from the shell, and avoids electrochemical corrosion of the shell.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

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

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

[0007] A first connecting portion and a second connecting portion are arranged opposite to each other, and are connected to 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 an optional embodiment of the present application, the first connecting portion includes a first folding portion and a second folding portion, the first folding portion is vertically connected to the first insulating portion, the second folding portion is vertically connected to the second insulating portion, and the first folding portion and the second folding portion are connected along a first direction;

[0011] The second connecting portion includes a third folded portion and a fourth folded portion, the third folded portion is vertically connected to a side of the first insulating portion away from the first folded portion, the fourth folded portion is vertically connected to a side of the second insulating portion away from the second folded portion, and the third folded portion and the fourth folded portion are connected along the first direction;

[0012] One of the two folding parts is attached to and connected with the first folding part and the second folding part, and the other is attached to and connected with the third folding part and the fourth folding part.

[0013] In an optional embodiment of the present application, the first folding portion partially overlaps or completely overlaps with the second folding portion; the third folding portion partially overlaps or completely overlaps with the fourth folding portion.

[0014] In an optional embodiment of the present application, the first folded portion and the third folded portion extend from the first insulating portion along the first direction to the second insulating portion, the second folded portion and the fourth folded portion extend from the second insulating portion along the first direction to the first insulating portion, and the first folded portion, the third folded portion, the second folded portion and the fourth folded portion all have a first length;

[0015] The folded portion extends in a second direction and has a second length in the second direction, wherein the second length is smaller than the first length.

[0016] In an optional embodiment of the present application, the ratio of the second length to the first length is (2-8):10.

[0017] In an optional embodiment of the present application, the distance of the third insulating portion along the first direction is a third length.

[0018] The ratio between the third length and the first length is 10:(5-10).

[0019] In an optional embodiment of the present application, the third insulating part is integrally formed with the first insulating part, the second insulating part and the folding part, the first folding part and the third folding part are respectively integrally formed with the first insulating part, and the first folding part, the second folding part and the fourth folding part are respectively integrally formed with the second insulating part.

[0020] In an optional embodiment of the present application, the folding portion includes an integrally formed first sub-portion, a second sub-portion and a third sub-portion, the second sub-portion is connected to one side of the third insulating portion and is bonded and connected to the first connecting portion or the second connecting portion along the second direction, the first sub-portion and the third sub-portion are respectively arranged on both sides of the second sub-portion, one of the two is bonded and connected to the first folding portion or the third folding portion, and the side of one of the two away from the first folding portion or the third folding portion is also bonded and connected to the second sub-portion; the other is bonded and connected to the second folding portion or the fourth folding portion, and the side of the other away from the second folding portion or the fourth folding portion is also bonded and connected to the second sub-portion, wherein the first sub-portion and the third sub-portion have a fold at their connection with the second sub-portion, and the fold forms an acute angle α with the side of the second sub-portion close to the third insulating portion, wherein 45°≤α≤60°.

[0021] In a second aspect, the present application provides a battery core insulating protective cover, comprising:

[0022] A first insulating portion and a second insulating portion disposed opposite to each other;

[0023] A first connecting portion and a second connecting portion are arranged opposite to each other, respectively connecting the first insulating portion and the second insulating portion, wherein the second connecting portion includes a first folding portion and a second folding portion connected to each other along a first direction, one of the first folding portion and the second folding portion is connected to the first insulating portion, and the other is connected to the second insulating portion;

[0024] A third insulating portion is disposed on the same side of the first insulating portion, the second insulating portion, the first connecting portion, and the second connecting portion, wherein the first insulating portion, the second insulating portion, the first connecting portion, the second connecting portion, and the third insulating portion enclose a receiving cavity, and the battery cell is received in the receiving cavity; and

[0025] The bottom support plate is thermally melt-connected to a side of the third insulating portion away from the battery core.

[0026] In an optional embodiment of the present application, the first connecting portion has a first length along the first direction;

[0027] The third insulating portion has a second length along the first direction, and the second length is less than or equal to the first length.

[0028] In an optional embodiment of the present application, the ratio of the second length to the first length is (1-10):10.

[0029] In an optional embodiment of the present application, the first folding portion extends along the first direction toward a side close to the second folding portion, the second folding portion extends along the first direction toward a side close to the first folding portion, the first folding portion and the second folding portion both have a third length along the first direction, and the ratio of the third length to the first length is (5-10):10.

[0030] In an optional embodiment of the present application, the first connecting portion is integrally formed with the first insulating portion, the second insulating portion and the third insulating portion, the first folding portion is integrally formed with the third insulating portion and the first insulating portion, and the second folding portion is integrally formed with the third insulating portion and the second insulating portion.

[0031] In an optional embodiment of the present application, the battery core insulating protective cover is formed by hot-melt connection.

[0032] In a third aspect, the present application provides a battery, comprising:

[0033] shell;

[0034] A battery cell, located in the housing;

[0035] The battery core insulating protective cover covers the battery core and is located between the battery core and the outer shell.

[0036] The battery cell insulating protective cover provided by the present application includes at least the following beneficial effects: the foldable portion can be folded to fit 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

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of a battery cell insulating protective cover provided in one embodiment of the present application.

[0039] Figure 2 Another structural schematic diagram of a battery cell insulating protective cover provided in one embodiment of the present application.

[0040] Figure 3 A schematic diagram of the unfolded structure of a battery cell insulating protective cover provided in one embodiment of the present application.

[0041] Figure 4 A schematic structural diagram of a battery cell insulating protective cover provided in another embodiment of the present application.

[0042] Figure 5 A top view of a battery cell insulating protective cover provided in another embodiment of the present application.

[0043] Figure 6 A schematic diagram of the expanded structure of a battery cell insulating protective cover provided in another embodiment of the present application.

[0044] Figure 7 A schematic structural diagram of a battery cell insulating protective cover provided in yet another embodiment of the present application.

[0045] Figure 8 Another structural schematic diagram of a battery cell insulating protective cover provided in yet another embodiment of the present application.

[0046] Fig. 9 A schematic diagram of the unfolded structure of a battery cell insulating protective cover provided in yet another embodiment of the present application.

[0047] Figure numerals: Embodiment 1: 100, cell insulation protective cover; 10, first insulating portion; 20, second insulating portion; 30, first connecting portion; 301, first folding portion; 302, second folding portion; 40, second connecting portion; 401, third folding portion; 402, fourth folding portion; 50, third insulating portion; 60, folding portion; 601, first sub-portion; 602, second sub-portion; 603, third sub-portion; A, crease;

[0048] Embodiment 2: 200, battery core insulating protective cover; 10, first insulating portion; 20, second insulating portion; 30, first connecting portion; 40, second connecting portion; 401, first folding portion; 402, second folding portion; 50, third insulating portion; 60, bottom support plate; B, crease;

[0049] Embodiment 3: 300, 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; C, crease. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0051] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0052] The present application may repeat reference numerals and / or reference letters in different implementations. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0053] The battery cell insulating protective cover provided in the present application will be described in detail below in conjunction with specific embodiments and drawings.

[0054] Embodiment 1

[0055] See also Figure 1-Figure 3 The present application provides a battery core insulating protective cover 100, comprising:

[0056] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0057] 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;

[0058] 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, 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 are enclosed to form a receiving cavity, and the battery cell is received in the receiving cavity; and

[0059] 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 at one side away from the battery cell.

[0060] Specifically, the cell insulation protective cover 100 is configured to cover a square cell, for example, to isolate the cell from the shell, to prevent the electrochemical reaction of the cell or the corrosion of the shell by substances, thereby affecting the life and performance of the battery. The cell insulation protective cover 100 can be made of, for example, polypropylene (PP) or polyethylene terephthalate (PET), but is not limited thereto.

[0061] See also Figure 2 Specifically, the first insulating part 10, the second insulating part 20, the first connecting part 30 and the second connecting part 40, for example, enclose a square accommodating cavity, one side of the accommodating cavity is an opening, the battery cell is placed in the accommodating cavity from the opening, the battery cell and the battery cell insulating protective cover 100 are placed together in the outer shell, and the battery cell insulating protective cover 100 is used to prevent the electrochemical reaction of the battery cell or the substances produced by it from corroding the outer shell.

[0062] See also Figure 2 Furthermore, the folding 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 folding 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 connected corners, ensuring that there is no gap for electrochemical substances to overflow from the battery cell insulating protective cover 100, reducing the impact of electrochemical reactions or leakage of substances produced by them on the shell, isolating the battery cell and the shell, and preventing the shell from being corroded.

[0063] Specifically, the side of the battery cell insulating protective cover 100 facing the battery cell, such as the back glue, is adhered to the battery cell by adhesive, ensuring that the battery cell insulating protective cover 100 is not easy to fall off the battery cell, isolating the battery cell and the shell, and preventing the shell from being corroded.

[0064] See also Figure 2In an optional 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, 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 a 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, 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.

[0065] Specifically, the first folded portion 301 is bent 90° between the first insulating portion 10 or the second insulating portion 20, and is bonded to the second folded portion 302 along the first direction X to form a plane, and the second folded portion 302 is bent 90° between the first insulating portion 10 or the second insulating portion 20, and is bonded to the first folded portion 301 along the first direction X1 to form a plane, enclosing a partially symmetrical accommodation cavity. The first folded portion 301 and the second folded portion 302 are bonded to form the first connecting portion 30.

[0066] See also Figure 2 and Figure 3 In an optional embodiment of the present application, the first folded portion 301 and the third folded portion 401 extend from the first insulating portion 10 to the second insulating portion 20 along the first direction X, the second folded portion 302 and the fourth folded portion 402 extend from the second insulating portion 20 to the first insulating portion 10 along the first direction X, 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 L1;

[0067] 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.

[0068] See also Figure 3 Further, the distance between the first insulating part 10 and the second insulating part 20 of the third insulating part 50 along the first direction X is a third length L3, and the sum of the lengths of the connection between the first folding part 301 and the second folding part 302 is equal to the third length L3, that is, the length of the first connecting part 30 between the second insulating part 20 and the first insulating part 10 is equal to the third length L3.

[0069] In this embodiment, 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 of 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.

[0070] In another embodiment, 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, and the length of the first connecting portion 30 formed by the partial or full overlap extending along the first direction X is equal to the third length L3, and the ratio of the first length L1 of the first folding portion 301 to the first length L1 of the second folding portion 302 and the third length L3 is, for example, (6-10): (6-10): 10.

[0071] Preferably, the partial overlap between the first folding portion 301 and the second folding portion 302 may be, for example, 5 mm to 20 mm, but is not limited thereto.

[0072] See also Figure 1-Figure 3 In an optional 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, 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 attached to and connected to the first folding portion 301 and the second folding portion 302, and the other is attached to and connected to the third folding portion 401 and the fourth folding portion 402.

[0073] Specifically, the third folded portion 401 is, for example, bent 90° between the first insulating portion 10 or the second insulating portion 20, and bonded to the fourth folded portion 402. The fourth folded portion 402 is, for example, bent 90° between the first insulating portion 10 or the second insulating portion 20, and bonded to the third folded portion 401 to form a plane, so as to enclose another symmetrical part of the accommodating cavity. The third folded portion 401 and the fourth folded portion 402 are bonded to form the second connecting portion 40.

[0074] See also Figure 3In an optional embodiment of the present application, the first folded portion 301 and the third folded portion 401 extend from the first insulating portion 10 to the second insulating portion 20 along the first direction X, the second folded portion 302 and the fourth folded portion 402 extend from the second insulating portion 20 to the first insulating portion 10 along the first direction X, 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 L1;

[0075] 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.

[0076] Furthermore, the distance between the first insulating part 10 and the second insulating part 20 of the third insulating part 50 along the first direction X is a third length L3, and the sum of the lengths of the connection between the third folding part 401 and the fourth folding part 402 is equal to the third length L3, that is, the length of the second connecting part 40 between the second insulating part 20 and the first insulating part 10 is equal to the third length L3.

[0077] In this embodiment, the third folding portion 401 and the fourth folding portion 402 are bonded on 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 of 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.

[0078] In another embodiment, 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 extending along the first direction X toward the side close to the battery cell after the 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 of 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.

[0079] Preferably, the third folding portion 401 and the fourth folding portion 402 partially overlap, for example, by 5 mm to 20 mm, but is not limited thereto.

[0080] According to the above description, the distance between the third insulating portion 50 along the first insulating portion 10 and the second insulating portion 20 is a third length L3, and the ratio of the third length L3 to the first length L1 is 10:(5-10).

[0081] In an optional 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), which makes it easy to fold the battery cell insulating protective cover 100 and saves costs to a certain extent.

[0082] In an optional embodiment of the present application, the third insulating part 50 is integrally formed with the first insulating part 10, the second insulating part 20 and the folding part 60, the first folding part 301 and the third folding part 401 are respectively integrally formed with the first insulating part 10, and the first folding part 301, the second folding part 302 and the fourth folding part 402 are respectively integrally formed with the second insulating part 20.

[0083] See also Figure 3 In an optional 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 closely connected 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 two is closely connected to the first folding portion 301 or the third folding portion 401, and one of the two is away from the first folding portion 301 or the third folding portion One side of 401 is also fitted and connected to the second sub-section 602; the other is fitted and connected to the second folding portion 302 or the fourth folding portion 402, and the other side away from the second folding portion 302 or the fourth folding portion 402 is also fitted and connected to the second sub-section 602, wherein 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 insulating protective cover 100 into shape, and the fold A forms an acute angle α with the side of the second sub-section 602 close to the third insulating portion 50, wherein 45°≤α≤60°.

[0084] Specifically, the folding portion 60 is, for example, rectangular when not folded, the second sub-portion 602 is, for example, a trapezoid, the two angles of the trapezoid are, for example, acute angles α, the first sub-portion 601 and the third sub-portion 603 are triangles, and cooperate with the second sub-portion 602 of the trapezoid to form a rectangular folding portion 60. The fold A forms an acute angle α with the side of the second sub-portion 602 close to the third insulating portion 50, and the setting of the angle makes the two folds A not intersecting at one end away from the third insulating portion 50, so as to prevent the folding portion 60 from overlapping unevenly on the side away from the third insulating portion 50 during the folding process, thereby causing poor folding during the folding process of the battery cell insulating protective cover 100, affecting the effect of the battery cell insulating protective cover 100. Specifically, the fold A is a pre-fold, that is, the fold A can be processed first in the factory processing stage, for example, to facilitate subsequent folding.

[0085] In one embodiment, the first folding portion 301 and the second folding portion 302 may be glued together at a side away from the battery cell, and the third folding portion 401 and the fourth folding portion 402 may be glued together at a side away from the battery cell.

[0086] Embodiment 2

[0087] See also Figure 4-Figure 6 In a second aspect, the present application provides a battery cell insulating protective cover 200, comprising:

[0088] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0089] The first connecting portion 30 and the 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 first folding portion 401 and a second folding portion 402 connected to each other along the first direction X, one of the first folding portion 401 and the second folding portion 402 is connected to the first insulating portion 10, and the other is connected to the second insulating portion 20;

[0090] A third insulating portion 50 is disposed 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

[0091] The bottom support plate 60 is thermally melt-connected to a side of the third insulating portion 50 away from the battery core.

[0092] Specifically, the cell insulation protective cover 200 is configured to cover a square cell, for example, to isolate the cell from the shell, to prevent the electrochemical reaction of the cell or the corrosion of the shell by substances, thereby affecting the life and performance of the battery. The cell insulation protective cover 200 can be made of, for example, polypropylene (PP) or polyethylene terephthalate (PET), but is not limited thereto.

[0093] See also Figure 4 Specifically, 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 60, for example, enclose a square accommodating cavity, one side of the accommodating cavity is an opening, the battery cell is placed in the accommodating cavity from the opening, and the battery cell and the battery cell insulating protective cover 200 are placed together in the outer shell to prevent the electrochemical reaction of the battery cell or its substances from corroding the outer shell.

[0094] Furthermore, the third insulating part 50 is folded toward a side close to the battery cell, and the bottom support plate 60 is disposed on a side of the third insulating part 50 away from the battery cell. The third insulating part 50 fits the bottom portion of the battery cell, and the connection with the bottom support plate 60 further ensures that electrochemical substances will not overflow from the bottom corners of the battery cell insulating protective cover 200 and contact the outer shell, thereby completely isolating the contact between the battery cell and the outer shell.

[0095] Specifically, the side of the battery cell insulating protective cover 200 facing the battery cell is adhesive, and the battery cell insulating protective cover 200 is adhered to the battery cell by adhesive, ensuring that the battery cell insulating protective cover 200 is not easy to fall off the battery cell, isolating the battery cell and the shell.

[0096] Specifically, the bottom support plate 60 can be made of, for example, polypropylene (PP) or polyethylene terephthalate (PET), but is not limited thereto.

[0097] See also Figure 6 In an optional embodiment of the present application, the first connecting portion 30 has a first length L1 along the first direction X;

[0098] The third insulating portion 50 has a second length L2 along the first direction X, and the second length L2 is less than or equal to the first length L1. The third insulating portion 50 and the bottom support plate 60 cooperate to prevent the electrochemical substances of the battery cell from overflowing from the corners and corroding the shell.

[0099] In an optional 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 part 50 on the battery cell partially covers the bottom of the battery cell, or may completely cover the bottom of the battery cell, which shall be subject to actual application.

[0100] In an optional embodiment of the present application, the first folding portion 401 extends along the first direction X, the second folding portion 402 extends along the first direction X, the first folding portion 401 and the second folding portion 402 both have a third length L3 along the first direction X, and the ratio of the third length L3 to the first length L1 is (5-10):10.

[0101] See also Figure 4 Specifically, the first folding portion 401 is bent 90° between the first insulating portion 10, and is connected to the second folding portion 402. The second folding portion 402 is bent 90° between the second insulating portion 20, and is connected to the first folding portion 401. The second folding portion 402 and the first folding portion 401 can, for example, partially overlap or completely overlap. After the overlap, 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 60 are arranged at an opening of the accommodating cavity, for supporting the battery cell and isolating the battery cell and the shell to prevent the electrochemical substances from corroding the shell.

[0102] In one embodiment, the first folding portion 401 and the second folding portion 402 are adhered but not overlapped, the sum of the lengths of the first folding portion 401 and the second folding portion 402 extending along the first direction X after being adhered is equal to the first length L1, and the ratio among the third length L3 of the first connecting portion 40, the third length L3 of the second connecting portion and the first length L1 is 1:1:2.

[0103] In another embodiment, the first folding portion 401 and the second folding portion 402 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 of the third length L3 of the first folding portion 401, the third length L3 of the second folding portion 402 and the first length L1 is (6-10):(6-10):10.

[0104] In an optional 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 first folding portion 401 is integrally formed with the third insulating portion 50 and the first insulating portion 10, and the second folding portion 402 is integrally formed with the third insulating portion 50 and the second insulating portion 20.

[0105] In an optional embodiment of the present application, any connection of 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. Specifically, the fold B is a pre-fold, that is, the fold B can be processed first in the factory processing stage, for example, to facilitate subsequent folding and forming.

[0106] Embodiment 3

[0107] See also Figure 7-Figure 9 In a third aspect, the present application provides a battery core insulating protective cover 300, comprising:

[0108] A first insulating portion 10 and a second insulating portion 20 arranged opposite to each other;

[0109] 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;

[0110] 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, 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 are enclosed to form a receiving cavity, and the battery cell is received in the receiving cavity;

[0111] 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 fitted and 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.

[0112] In one embodiment, the first connection portion 30 includes a first folded portion 301 and a second folded portion 302, the first folded portion 301 is vertically connected to the first insulating portion 10, the second folded portion 302 is vertically connected to the second insulating portion 20, and the first folded portion 301 and the second folded portion 302 are connected along a first direction X;

[0113] 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, the fourth folding portion 402 is vertically connected to a side of the second insulating portion 20 away from the second insulating portion 20, and the third folding portion 401 and the fourth folding portion 402 are connected along the first direction X.

[0114] In one embodiment, the structure of the battery cell insulation protective cover 300 of the third embodiment is substantially the same as that of the battery cell insulation protective cover 100 of the first embodiment, and the difference is that one side of the folding portion 60 of the third embodiment is attached to the battery cell, and the other side is attached to the first connecting portion 30 or the second connecting portion 40 arranged oppositely, while the folding portion 60 of the first embodiment is not attached to the battery cell, but only attached to the side of the first connecting portion 30 or the second connecting portion 40 arranged oppositely away from the battery cell. A fold C is provided on each of the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 of the third embodiment, and the fold C extends from the angle of the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 close to the third insulating portion 50 at an acute angle α, and the angle between the fold C and the third insulating portion 50 is, for example, 45°.

[0115] Furthermore, during the molding process of the battery cell insulating protective cover 300, the first insulating portion 10 and the second insulating portion 20 are folded 90° and arranged oppositely, the first folded portion 301, the second folded portion 302, the third folded portion 401 and the fourth folded portion 402 are folded 90° to the side away from the battery cell, and based on the acute angle α crease C on the first folded portion 301, the second folded portion 302, the third folded portion 401 and the fourth folded portion 402, the two folded portions 60 are located on the side of part of the battery cell and are arranged oppositely, the first folded portion 301, the second folded portion 302, the third folded portion 401 and the fourth folded portion 402 are folded 90° to the side away from the battery cell, and the first folded portion 301, the second folded portion 302, the third folded portion 401 and the fourth folded portion 402 are folded 90° to the side away from the battery cell. The portion where the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 are connected to the two folding portions 60 is triangular, and then the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 are folded 90° and attached to the side of the two folding portions 60 away from the battery cell to form a receiving cavity, and the folding portion 60 cooperates with the first folding portion 301, the second folding portion 302, the third folding portion 401 and the fourth folding portion 402 to cover the corners of the battery cell to prevent the electrochemical substances from overflowing from the corners and corroding the shell. For other structures, please refer to Example 1, which will not be repeated here.

[0116] Specifically, when any of the above-mentioned battery core insulating protective covers is formed, for example, adhesive bonding or hot-melt connection is adopted. The battery core insulating protective cover 300 has adhesive on one side facing the battery core, and the battery core insulating protective cover 300 is bonded to the battery core.

[0117] In a third aspect, the present application provides a battery, comprising:

[0118] shell;

[0119] A battery cell, located in the housing;

[0120] As described in any one of Embodiment 1, Embodiment 2 or Embodiment 3, the battery cell insulating protective cover covers the battery cell and is located between the battery cell and the shell.

[0121] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A battery core insulating protective cover, characterized in that: include: A first insulating portion and a second insulating portion disposed opposite to each other; A first connecting portion and a second connecting portion are arranged opposite to each other, and are connected to the first insulating portion and the second insulating portion respectively; 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 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.

2. The battery core insulating protective cover according to claim 1, characterized in that: The first connecting portion includes a first folding portion and a second folding portion, the first folding portion is vertically connected to the first insulating portion, the second folding portion is vertically connected to the second insulating portion, and the first folding portion and the second folding portion are connected along a first direction; The second connecting portion includes a third folded portion and a fourth folded portion, the third folded portion is vertically connected to a side of the first insulating portion away from the first folded portion, the fourth folded portion is vertically connected to a side of the second insulating portion away from the second folded portion, and the third folded portion and the fourth folded portion are connected along the first direction; One of the two folding parts is attached to and connected with the first folding part and the second folding part, and the other is attached to and connected with the third folding part and the fourth folding part.

3. The battery core insulating protective cover according to claim 2, characterized in that: The first folding portion partially overlaps with the second folding portion or completely overlaps with each other; the third folding portion partially overlaps with the fourth folding portion or completely overlaps with each other.

4. The battery core insulating protective cover according to claim 3, characterized in that: The first folded portion and the third folded portion extend from the first insulating portion along the first direction to the second insulating portion, the second folded portion and the fourth folded portion extend from the second insulating portion along the first direction to the first insulating portion, and the first folded portion, the third folded portion, the second folded portion and the fourth folded portion all have a first length; The folded portion 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, characterized in that: 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, characterized in that: A distance of the third insulating portion along the first direction is a third length, and a 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, characterized in that: The third insulating part is integrally formed with the first insulating part, the second insulating part and the folding part, the first folding part and the third folding part are respectively integrally formed with the first insulating part, and the first folding part, the second folding part and the fourth folding part are respectively integrally formed with the second insulating part.

8. The battery core insulating protective cover according to any one of claims 4 to 6, characterized in that: The folding portion includes an integrally formed first sub-portion, a second sub-portion and a third sub-portion, the second sub-portion is connected to one side of the third insulating portion and is bonded and connected to the first connecting portion or the second connecting portion along the second direction, the first sub-portion and the third sub-portion are respectively arranged on both sides of the second sub-portion, one of the two is bonded and connected to the first folding portion or the third folding portion, and the side of one of the two away from the first folding portion or the third folding portion is also bonded and connected to the second sub-portion; the other is bonded and connected to the second folding portion or the fourth folding portion, and the side of the other away from the second folding portion or the fourth folding portion is also bonded and connected to the second sub-portion, wherein the first sub-portion and the third sub-portion have a fold at their connection with the second sub-portion, and the fold forms an acute angle α with the side of the second sub-portion close to the third insulating portion, wherein 45°≤α≤60°.

9. A battery core insulating protective cover, characterized in that: include: A first insulating portion and a second insulating portion disposed opposite to each other; A first connecting portion and a second connecting portion are arranged opposite to each other, respectively connecting the first insulating portion and the second insulating portion, wherein the second connecting portion includes a first folding portion and a second folding portion connected to each other along a first direction, one of the first folding portion and the second folding portion is connected to the first insulating portion, and the other is connected to the second insulating portion; A third insulating portion is disposed on the same side of the first insulating portion, the second insulating portion, the first connecting portion, and the second connecting portion, wherein the first insulating portion, the second insulating portion, the first connecting portion, the second connecting portion, and the third insulating portion enclose a receiving cavity, and the battery cell is received in the receiving cavity; and The bottom support plate is thermally melt-connected to a side of the third insulating portion away from the battery core.

10. The battery core insulating protective cover according to claim 9, characterized in that: The first connecting portion has a first length along the first direction; The third insulating portion 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, characterized in that: 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, characterized in that: The first folding portion extends along the first direction toward a side close to the second folding portion, and the second folding portion extends along the first direction toward a side close to the first folding portion. The first folding portion and the second folding portion 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, characterized in that: The first connecting portion is integrally formed with the first insulating portion, the second insulating portion and the third insulating portion, the first folding portion is integrally formed with the third insulating portion and the first insulating portion, and the second folding portion is integrally formed with the third insulating portion and the second insulating portion.

14. The battery core insulating protective cover according to any one of claims 1 or 9, characterized in that: The battery core insulating protective cover is formed by hot-melt connection.

15. A battery, characterized in that: include: shell; A battery cell, located in the housing; The battery core insulating protective cover according to any one of claims 1 to 14, covers the battery core and is located between the battery core and the shell.

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