A single cell

Abstract

The utility model discloses a single battery, apply to battery technical field to solve the problem that the bottom corner of the existing battery is pressed to cause lithium precipitation phenomenon and then influence battery life when being in the side -lying state. Specifically, the suspension frame is arranged between the outer surface formed by the two first surfaces and the two second surfaces of the roll core and the shell, and the roll core is hot melt connected with the suspension frame after the first adhesive member is attached to the two second surfaces of the roll core, so that the roll core can be effectively prevented from directly contacting the shell, the peeling force of the first adhesive member can be used to offset the gravity of the roll core, the roll core can be prevented from sliding, the roll core can be firmly hung by the first adhesive member, the bottom corner of the roll core can be prevented from contacting the suspension frame, and the problem that the bottom corner of the roll core is pressed by the gravity and the expansion force to cause lithium precipitation phenomenon and then influence battery life when the battery is in the side -lying state can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single-cell battery. Background Technology

[0002] A single battery cell mainly consists of a casing and a winding core housed within the casing. When the single battery cell is in an upright position, the winding core is basically centered within the casing, and there is a certain gap between the winding core and the casing. This gap is designed to allow space for the expansion of the winding core during cycling.

[0003] In some cases, individual battery cells need to be placed on their side. In this position, due to gravity, the winding core tilts within the casing, and the bottom corner of the core, where its side and bottom surfaces meet, comes into contact with the casing. As the cycling process continues, the winding core gradually expands. The bottom corner of the core is compressed by the casing due to this expansion force. As the expansion force increases, lithium plating occurs first at the bottom corner, causing the core to lose its effectiveness and consequently shortening the lifespan of the individual battery. Utility Model Content

[0004] This utility model provides a single-cell battery to solve the problem that when existing batteries are placed on their side, the bottom corner of the core is easily squeezed by gravity, leading to lithium plating and affecting battery life. The technical solution provided by this utility model is as follows:

[0005] This utility model provides a single battery, including a housing, and a winding core, a first adhesive member and a suspension frame arranged sequentially from the inside to the outside within the housing;

[0006] The core includes two first surfaces opposite each other in a first direction and two second surfaces opposite each other in a second direction; the first direction and the second direction are perpendicular to each other;

[0007] The first adhesive is attached to the two second sides of the core;

[0008] The suspension frame surrounds the outer sides of the two first surfaces and two second surfaces of the core; a gap exists between a portion of the suspension frame and the first adhesive, and the other portions of the suspension frame, except for the portion, are thermally bonded to the first adhesive, the portion including at least the projection area of ​​the core along the second direction on the inner wall of the suspension frame.

[0009] Optionally, the winding core also includes two third faces facing each other in a third direction; the third direction is perpendicular to the first direction and the second direction respectively; the single cell also includes a second adhesive member;

[0010] The second adhesive is attached to the two second surfaces of the core along a third direction and extends to at least a portion of the two third surfaces of the core; the size of the second adhesive in the first direction is smaller than the size between the positive and negative connecting pieces of the core; the contact portion of the second adhesive with other areas of the suspension frame is heat-fused.

[0011] Optionally, the second adhesive is located outside the first adhesive.

[0012] Optionally, the dimension of the second adhesive in the second direction is not less than 2 / 3 of the dimension of the core in the second direction.

[0013] Optionally, the first adhesive element is attached to the two second sides of the core by high-temperature adhesive.

[0014] Optionally, the thickness of the suspension frame is δ1, where 0.1 mm ≤ δ1 ≤ 0.3 mm.

[0015] Optionally, the thickness of the first adhesive and the second adhesive is δ2, wherein 0.03 mm ≤ δ2 ≤ 0.05 mm.

[0016] Optionally, the size of the suspension frame is larger than the size of the core by a first value, where the first value is d1, 0.5 mm ≤ d1 ≤ 2 mm.

[0017] Optionally, the size of the first adhesive element is larger than the size of the second side of the core by a second value; wherein the second value is d2, 0.5 mm ≤ d2 ≤ 2 mm.

[0018] Optionally, the gap between the suspension frame and the housing is L, where 0 mm ≤ L ≤ 0.5 mm.

[0019] The beneficial effects of this utility model are as follows:

[0020] In the single-cell battery provided by this utility model, a suspension frame is added between the outer surface of the single-cell battery casing and the two first and two second surfaces of the winding core. After attaching the first adhesive to the two second surfaces of the winding core, the first adhesive is thermally fused to the suspension frame. This can prevent the bottom corner of the winding core from directly contacting the casing when the single-cell battery is placed on its side. At the same time, the peeling force of the first adhesive counteracts the weight of the winding core when the single-cell battery is placed on its side, effectively preventing the winding core from slipping. Thus, the first adhesive can firmly hold the winding core, preventing the bottom corner of the winding core from contacting the suspension frame when the single-cell battery is placed on its side. This effectively prevents lithium plating caused by the pressure of gravity and expansion force at the bottom corner of the winding core when the single-cell battery is placed on its side, which would affect the battery life.

[0021] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this invention, are illustrative and descriptive of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is an isometric view of a single battery cell in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram showing the positional relationship between the core and the shell when a single battery cell is placed upright inside the battery pack in an embodiment of this utility model.

[0025] Figure 3 This is a schematic diagram showing the positional relationship between the core and the shell when a single battery cell is placed sideways inside the battery pack housing in an embodiment of this utility model.

[0026] Figure 4 This is an exploded view of the composition structure of a single battery cell in an embodiment of this utility model;

[0027] Figure 5 This is a schematic cross-sectional view of the composition structure of a single battery cell in an embodiment of this utility model;

[0028] Figure 6 This is an isometric view of the battery module in an embodiment of this utility model;

[0029] Figure 7 This is an exploded view of the composition structure of the battery module in an embodiment of this utility model.

[0030] In the icon: 100 - housing; 110 - core, x - first direction of the core, y - second direction of the core, z - third direction of the core, 111 - first surface of the core, 112 - second surface of the core, 113 - third surface of the core, 114 - positive electrode connecting piece of the core, 115 - negative electrode connecting piece of the core; 120 - first adhesive element; 130 - suspension frame, 131 - part of the suspension frame, 132 - other parts of the suspension frame Other areas; 140-Second adhesive component; 150-Surface pad; 160-Cover plate; 161-Positive terminal; 162-Negative terminal; 163-Explosion-proof valve; 164-Sealing aluminum nail; 170-Bottom support plate; 200-Box body; 210-Single cell; 220-Plastic nail; 230-Protective cover; 240-CCS; 250-End plate; 260-Steel strip; 270-Insulating film; 280-Bottom insulating plate; 290-Aluminum busbar. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should also be noted that the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0034] See related technologies. Figure 1 As shown, a single battery cell mainly consists of a casing 100 and a winding core 110 housed within the casing 100. The number of winding cores 110 can be multiple. Figure 1 Taking only two winding cores 110 as an example, a certain gap exists between the winding cores 110 and the housing 100. This gap is used to reserve space for the expansion of the winding cores 110 during cycling. The winding cores 110 have two first surfaces 111 opposite each other in a first direction x, two second surfaces 112 opposite each other in a second direction y, and two third surfaces 113 opposite each other in a third direction z. In most battery packs, the individual cells are placed upright inside the battery pack housing, that is, the third surface 113 of the individual cells is placed parallel to the ground. In this state, refer to... Figure 2 As shown, the winding core 110 is centered within the housing 100. However, in some battery packs, the individual cells are placed sideways within the battery pack housing, meaning the first side 111 of the individual cell is parallel to the ground. In this state, refer to... Figure 3 As shown, under the influence of gravity, the core 110 is tilted within the housing 100, and its bottom corner, i.e., point P, comes into contact with the housing 100. As the cycle continues, the core 110 gradually expands. Due to the expansion force, the bottom corner of the core is squeezed by the housing 100. As the expansion force increases, lithium plating will occur first at the bottom corner of the core 110, causing the core 110 to lose its effectiveness, which in turn shortens the life of the single cell.

[0035] To solve the above problems, in the single-cell battery provided by this utility model, the positive electrode, separator, and negative electrode of the core 110 are connected by hot pressing. A suspension frame is added between the outer surface formed by the two first surfaces 111 and two second surfaces 112 of the housing 100 and the core 110. After the two second surfaces 112 of the core 110 are attached with first adhesive members, they are thermally fused to the suspension frame. This prevents the bottom corner of the core 110 from directly contacting the housing 100 when the single-cell battery is placed on its side. At the same time, the peeling force of the first adhesive members is used to counteract the gravity of the core 110 when the single-cell battery is placed on its side. Furthermore, the peeling force between the separator of the core 110 and the positive and negative electrode sheets is used to counteract the friction between the separator of the core 110 and the positive and negative electrode sheets, so that there will be no slippage between the first adhesive member 120 and the core 110, and between the separator of the core 110 and the electrode sheets. In this way, the first adhesive member can firmly hold the core 110, preventing the bottom corner of the core 110 from contacting the suspension frame when the single cell is placed on its side. This effectively prevents the bottom corner of the core 110 from being squeezed by gravity and expansion force when the single cell is placed on its side, which would cause lithium plating and affect the battery life.

[0036] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] See Figure 4 As shown, the single battery provided by this utility model includes a housing 100, and a core 110, a first adhesive 120 and a suspension frame 130 arranged sequentially from the inside to the outside within the housing 100.

[0038] The core 110 includes two first surfaces 111 opposite each other in the first direction x and two second surfaces 112 opposite each other in the second direction y; the first direction x and the second direction y are perpendicular to each other;

[0039] The first adhesive 120 is attached to the two second surfaces 112 of the core 110;

[0040] The suspension frame 130 surrounds the outside of the two first surfaces 111 and the two second surfaces 112 of the core 110; a gap exists between a portion 131 of the suspension frame 130 and the first adhesive 120, and the other portions 132 of the suspension frame 130, excluding the portion 131, are thermally fused to the first adhesive 120; the portion 131 includes at least the projection area of ​​the core 110 along the second direction y on the inner wall of the suspension frame 130.

[0041] In the single-cell battery provided in this embodiment of the utility model, the suspension frame 130 has the characteristics of high strength and high rigidity, which enables the core 110 to be suspended inside the housing 100, avoiding direct contact between the core 110 and the housing 100. Furthermore, there is a gap between the suspension frame 130 and the first adhesive member 120 in the projection area of ​​the core 110 along the second direction y, providing expansion space for the core 110. This achieves isolation between the core 110 and the housing 100 without affecting the normal operation of the core 110, preventing direct contact between them. The first adhesive member 120 has the characteristics of high adhesion and high peel strength. The first adhesive member 120 and the core 110 are subjected to a pair of balanced forces—friction and gravity—and the friction force, etc. Due to gravity, the peeling force of the first adhesive 120 is much greater than the frictional force, so the core 110 can be bonded to the first adhesive 120. After hot pressing, the peeling force between the separator and the positive and negative electrode sheets of the core 110 is also much greater than the frictional force between the separator and the positive and negative electrode sheets of the core 110. As a result, there will be no slippage between the first adhesive 120 and the core 110, or between the separator and the positive and negative electrode sheets of the core 110. This allows the first adhesive 120 to firmly hold the core 110, thereby effectively preventing the bottom corner of the core 110 from contacting the suspension frame 130 when the single cell is placed on its side. It also prevents the bottom corner of the core 110 from being squeezed by gravity and expansion force, which could lead to lithium plating and affect the battery life.

[0042] In one embodiment, the core 110 includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet, separator, and negative electrode sheet are stacked and then formed into the core 110 by winding and hot pressing.

[0043] In the single battery provided in this embodiment of the utility model, the positive electrode, separator, and negative electrode in the core 110 are connected by hot pressing. After hot pressing, the peeling force between the separator of the core 110 and the positive and negative electrode is much greater than the frictional force between the separator of the core 110 and the positive and negative electrode. The peeling force between the separator of the core 110 and the positive and negative electrode can offset the frictional force between the separator of the core 110 and the positive and negative electrode, so that the separator of the core 110 will not slip with the positive and negative electrode, and further ensure that the first adhesive 120 can firmly hold the core 110.

[0044] In one embodiment, the suspension frame 130 can be made of any material with high strength, high rigidity and electrolyte resistance, for example, the suspension frame 130 can be made of PPR (random copolymer polypropylene); the first adhesive 120 can be made of any material with high adhesion and high peel strength, for example, the first adhesive 120 can be made of PP (polypropylene) or PET (polyethylene terephthalate).

[0045] In the single-cell battery provided in this embodiment, the suspension frame 130 is made of PPR, and the first adhesive element 120 is made of PP or PET. This improves the suspension effect of the core 110, thereby better preventing the bottom corner of the core 110 from contacting the suspension frame 130 when the single-cell battery is placed on its side. It also prevents lithium plating from occurring at the bottom corner of the core 110 due to pressure from gravity and expansion forces, which would otherwise affect battery life. Furthermore, PPR has a similar melting point to PP or PET (heat melt temperature between 150℃ and 160℃), making heat melting easier and reducing manufacturing difficulty.

[0046] In one implementation, see [reference] Figure 4 As shown, the core 110 also includes two third surfaces 113 facing each other in the third direction z; the third direction z is perpendicular to the first direction x and the second direction y respectively; the single cell provided in this embodiment of the present invention also includes a second adhesive member 140;

[0047] The second adhesive 140 is attached to the two second surfaces 112 of the core 110 along the third direction z and extends to at least a portion of the two third surfaces 113 of the core 110; the dimension of the second adhesive 140 in the first direction x is smaller than the dimension between the positive electrode connecting piece 114 and the negative electrode connecting piece 115 of the core 110; the second adhesive 140 is thermally fused to the contact portion of the other area 132 of the suspension frame 130.

[0048] In the single battery provided by this utility model embodiment, in order to further enhance the bonding force between the first adhesive 120 and the core 110, a second adhesive 140 is attached to at least a portion of the two third surfaces 113 of the core 110 extending from the third direction z of the core 110. The second adhesive 140 is thermally fused to the contact portion of the other areas 132 of the suspension frame 130. This allows the high adhesion and high peeling force of the second adhesive 140 to make the bonding force between the first adhesive 120 and the core 110 stronger, further preventing slippage between the first adhesive 120 and the core 110, as well as between the separator and the positive and negative electrode sheets of the core 110. Furthermore, since the second adhesive 140 needs to extend and be attached to at least a portion of the two third surfaces 113 of the core 110, that is, the second adhesive 140 needs to extend and be attached to at least a portion of the top surface of the core 110, the size of the second adhesive 140 in the first direction x needs to be smaller than the size between the positive electrode connecting piece 114 and the negative electrode connecting piece 115 of the core 110. This can improve the bonding force between the first adhesive 120 and the core 110 while avoiding affecting the positive electrode connecting piece 114 and the negative electrode connecting piece 115 of the core 110.

[0049] In one embodiment, the second adhesive 140 is located outside the first adhesive 120.

[0050] In the single battery provided in this embodiment of the utility model, in order to achieve the best auxiliary effect of the second adhesive 140 and further enhance the bonding force between the first adhesive 120 and the core 110, the second adhesive 140 is attached to the outside of the first adhesive 120.

[0051] In one embodiment, the second adhesive 140 has a dimension a in the first direction x, wherein 20 mm ≤ a ≤ 30 mm.

[0052] In the single battery provided by this utility model embodiment, the size of the second adhesive 140 in the first direction x needs to be smaller than the size between the positive electrode connecting piece 114 and the negative electrode connecting piece 115 of the core 110. Preferably, the size a of the second adhesive 140 in the first direction x can be 20 mm ≤ a ≤ 30 mm, thereby reducing cost output while ensuring the best auxiliary effect of the second adhesive 140.

[0053] In one embodiment, the dimension of the second adhesive 140 in the second direction y is not less than 2 / 3 of the dimension of the core 110 in the second direction y.

[0054] In the single-cell battery provided by this embodiment of the utility model, in order to achieve the best auxiliary effect of the second adhesive member 140 and further improve the bonding force between the first adhesive member 120 and the core 110, the dimension of the second adhesive member 140 covering the third surface 113 in the second direction y can be 2 / 3 or more of the dimension of the core 110 (or the top surface or bottom surface) in the second direction y. This allows for cost reduction while ensuring the best auxiliary effect of the second adhesive member 140. Figure 4 Taking the second adhesive member 140 covering the entire dimension of the third surface 113 in the second direction y as an example, that is, the second adhesive member 140 is as follows: Figure 4 The rectangular adhesive member shown is an example. It's worth noting that the dimensions of the second adhesive member 140 covering the third surface 113 in the second direction y and its dimensions covering the third surface 113 in the first direction x are complementary. When the dimension of the second adhesive member 140 in the second direction y is chosen to be larger, the dimension of the second adhesive member 140 in the first direction x can be chosen to be smaller; conversely, when the dimension of the second adhesive member 140 in the second direction y is chosen to be smaller, the dimension of the second adhesive member 140 in the first direction x can be chosen to be larger. For example, when the second adhesive member 140 covers the entire dimension of the third surface 113 in the second direction y, that is, when the second adhesive member 140 is as shown... Figure 4 When the rectangular adhesive part is shown, the size of the second adhesive part 140 covering the first direction x can be a smaller value such as 20 mm or 21 mm; or, when the second adhesive part 140 covers 2 / 3 of the size of the third surface 113 in the second direction y, the size of the second adhesive part 140 covering the first direction x can be a larger value such as 29 mm or 30 mm.

[0055] In one embodiment, the first adhesive 120 is attached to the two second surfaces 112 of the core 110 by high-temperature adhesive.

[0056] In the single battery provided in this embodiment of the utility model, the first adhesive 120 is attached to the two second surfaces 112 of the core 110 by high-temperature adhesive, which can improve the firmness of the first adhesive 120 attached to the second surfaces 112, thereby further improving the bonding effect of the first adhesive 120.

[0057] In one embodiment, the thickness of the suspension frame 130 is δ1, wherein 0.1 mm ≤ δ1 ≤ 0.3 mm; the thickness of the first adhesive 120 and the second adhesive 140 is δ2, wherein 0.03 mm ≤ δ2 ≤ 0.05 mm.

[0058] In the single-cell battery provided in this embodiment of the utility model, the thickness δ1 of the suspension frame 130 can be 0.1 mm ≤ δ1 ≤ 0.3 mm, and the thickness δ2 of the first adhesive member 120 and the second adhesive member 140 can be 0.03 mm ≤ δ2 ≤ 0.05 mm. This allows for the reduction of cost output and optimization of battery weight and volume while ensuring the suspension effect of the suspension frame 130 and the bonding effect of the first adhesive member 120 and the second adhesive member 140.

[0059] In one embodiment, the size of the suspension frame 130 is larger than the size of the core 110 by a first value, wherein the first value is d1, 0.5 mm ≤ d1 ≤ 2 mm; the size of the first adhesive 120 is larger than the size of the second side 112 of the core 110 by a second value, wherein the second value is d2, 0.5 mm ≤ d2 ≤ 2 mm.

[0060] In the single-cell battery provided in this embodiment of the utility model, the size of the suspension frame 130 needs to be d1 larger than the size of the core 110, where d1 can be 0.5 mm ≤ d1 ≤ 2 mm. The size of the first adhesive member 120 needs to be d2 larger than the size of the second side 112 of the core 110, where d2 can be 0.5 mm ≤ d2 ≤ 2 mm. This allows for the thermal fusion connection between the suspension frame 130 and the first adhesive member 120 using the reserved dimensions of d1 and d2, while reducing cost and optimizing the weight and volume of the battery. In addition, the non-reserved size area between the suspension frame 130 and the first adhesive member 120 has a gap, which allows space for the expansion of the core 110, ensuring the normal operation of the core 110.

[0061] In one implementation, see [reference] Figure 5 As shown, the gap between the suspension frame 130 and the housing 100 is L, where 0 mm ≤ L ≤ 0.5 mm.

[0062] In the single battery provided in this embodiment of the utility model, the suspension frame 130 can prevent the core 110 from directly contacting the housing 100, and there is a gap between the suspension frame 130 and the first adhesive member 120 in the projection area of ​​the core 110 along the second direction y, which reserves space for the expansion of the core 110 during the cycle. Therefore, the gap L between the suspension frame 130 and the housing 100 can be 0 mm ≤ L ≤ 0.5 mm, thereby optimizing the volume of the single battery without affecting the suspension effect.

[0063] In one implementation, see [reference] Figure 4 As shown, in the single-cell battery provided in this embodiment of the present invention, the casing 100 can be an aluminum casing covered with a blue film, and the number of winding cores 110 can be at least two. Figure 4Taking two cores 110 as an example; the single cell also includes a face pad 150, a cover plate 160 (positive electrode post 161, negative electrode post 162, explosion-proof valve 163, sealing aluminum nail 164), a bottom support plate 170, and a lower plastic part (not shown in the figure), etc.

[0064] Based on the same technical concept, this utility model embodiment provides a battery module, see reference. Figures 6-7 As shown, the battery module provided in this embodiment of the present invention includes a housing 200 and at least two of the aforementioned single-cell batteries 210 disposed within the housing. Furthermore, see [link to relevant documentation]. Figure 7 As shown, the battery module provided in this embodiment of the present invention also includes plastic nails 220, protective cover 230, CCS (integrated busbar) 240, end plate 250, steel strip 260, insulating film 270, bottom insulating plate 280, aluminum busbar 290, etc.

[0065] In the single-cell battery and battery module provided in this embodiment of the present invention, by hot-pressing the positive electrode sheet, separator, and negative electrode sheet in the core 110 together, and adding a suspension frame 130 between the outer surface formed by the two first surfaces 111 and two second surfaces 112 of the housing 100 and the core 110, and by hot-melting the first adhesive 120 attached to the two second surfaces 112 of the core 110 with the suspension frame 130, it is possible to prevent the bottom corner of the core 110 from directly contacting the housing 100 when the single-cell battery is placed on its side, while using the peeling force of the first adhesive 120 to offset the effect of the core 110 when the single-cell battery is placed on its side. The gravity of the core 110 and the peeling force between the separator and the positive and negative electrode sheets after hot pressing offset the friction between the separator and the positive and negative electrode sheets of the core 110, so that there is no slippage between the first adhesive 120 and the core 110, and between the separator and the electrode sheets of the core 110. This allows the first adhesive 120 to firmly hold the core 110, preventing the bottom corner of the core 110 from contacting the suspension frame 130 when the single cell is placed on its side. This effectively prevents the bottom corner of the core 110 from being squeezed by gravity and expansion force when the single cell is placed on its side, which would cause lithium plating and affect the battery life.

[0066] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0067] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. A single-cell battery, characterized in that, It includes a housing, and a core, a first adhesive element, and a suspension frame arranged sequentially from the inside to the outside within the housing; The core includes two first surfaces opposite each other in a first direction and two second surfaces opposite each other in a second direction; the first direction and the second direction are perpendicular to each other; The first adhesive is attached to the two second surfaces of the core; The suspension frame surrounds the outside of the two first surfaces and two second surfaces of the core; a portion of the suspension frame has a gap with the first adhesive, and the other portions of the suspension frame, excluding the portion, are thermally fused to the first adhesive, wherein the portion includes at least the projection area of ​​the core onto the inner wall of the suspension frame along the second direction.

2. The single-cell battery as described in claim 1, characterized in that, The winding core also includes two third faces facing each other in a third direction; the third direction is perpendicular to the first direction and the second direction respectively; the single cell also includes a second adhesive member; The second adhesive is attached to the two second surfaces of the core along a third direction and extends to at least a portion of the two third surfaces of the core; the dimension of the second adhesive in the first direction is smaller than the dimension between the positive and negative electrode connecting pieces of the core; the contact portion of the second adhesive with the other areas of the suspension frame is heat-fused.

3. The single-cell battery as described in claim 2, characterized in that, The second adhesive is located outside the first adhesive.

4. The single-cell battery as described in claim 2, characterized in that, The dimension of the second adhesive in the second direction is not less than 2 / 3 of the dimension of the core in the second direction.

5. The single-cell battery as described in claim 1, characterized in that, The first adhesive is attached to the two second sides of the core by high-temperature adhesive.

6. The single-cell battery as described in claim 1, characterized in that, The thickness of the suspension frame is δ1, where 0.1 mm ≤ δ1 ≤ 0.3 mm.

7. The single-cell battery as described in claim 2, characterized in that, The thickness of the first adhesive and the second adhesive is δ2, wherein 0.03 mm ≤ δ2 ≤ 0.05 mm.

8. The single-cell battery as described in claim 1, characterized in that, The size of the suspension frame is larger than the size of the core by a first value, wherein the first value is d1, and 0.5 mm ≤ d1 ≤ 2 mm.

9. The single-cell battery as described in claim 1, characterized in that, The size of the first adhesive element is larger than the size of the second side of the core by a second value; wherein the second value is d2, 0.5 mm ≤ d2 ≤ 2 mm.

10. The single-cell battery as described in claim 1, characterized in that, The gap between the suspension frame and the housing is L, where 0 mm ≤ L ≤ 0.5 mm.

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