A battery and a battery device

Abstract

The application relates to the technical field of batteries, and discloses a battery and a battery device, wherein the battery comprises a battery body and a bending structure which is at least partially connected to the edge of the battery body and is used for supporting and dissipating heat of the battery body. The bending structure is connected to the edge of the battery body, which is equivalent to that the bending structure extends along the edge of the battery body, so that the surface area of the battery body is increased. Since a large amount of heat is generated during the actual use of the battery, the bending structure, as an extension structure of the battery body, plays a role in heat dissipation. In addition, the bending structure has a relatively large surface area compared with a flat structure, so that the contact area with air is increased, and the heat dissipation effect is good. The bending structure has a relatively large supporting strength since the bending structure is connected to the edge of the battery body. The bending structure has a bearing surface which is used for supporting the battery body, so that the stability of the contact between the battery body and the contact surface in contact with the battery body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery and a battery device. BACKGROUND

[0002] In the related art, after the battery of the battery device is put into the battery box, the contact surface between the battery and the battery box can be uneven, which affects the support strength of the battery in the battery box. At the same time, if the battery and the battery box are in close contact, the battery can not be cooled well, which affects the use reliability of the battery device. SUMMARY

[0003] The present application provides a battery and a battery device to improve the support and cooling performance.

[0004] According to a first aspect of the present application, there is provided a battery, comprising:

[0005] a battery body;

[0006] a bending structure connected to at least part of the edge of the battery body, the bending structure being used for the support and cooling of the battery body.

[0007] The battery of the present application has the bending structure connected to the edge of the battery body, which is equivalent to the bending structure extending along the edge of the battery body, thereby increasing the surface area of the battery body. Since the battery generates a large amount of heat during actual use, the bending structure acts as an extension of the battery body to cool it. The bending structure has a larger surface area than a flat structure, which increases the contact surface with air and improves the cooling effect. If the flange edge of the battery directly contacts the contact surface, the flange edge is relatively thin, and the contact and support strength between the flange edge and the contact surface is insufficient. By connecting the bending structure to the edge of the battery body, the bending structure has a larger support strength than the flange edge. The bending structure has a bearing surface for supporting the battery body, which improves the smoothness of the contact between the battery body and the contact surface.

[0008] According to a second aspect of the present application, there is provided a battery device, comprising the above-mentioned battery.

[0009] The battery device of the embodiment. The battery device comprises the battery. The bending structure is connected to the edge of the battery body, and the bending structure extends along the edge of the battery body, so that the surface area of the battery body is increased. Since the battery generates a large amount of heat during actual use, the bending structure acts as an extension of the battery body and plays a role in heat dissipation. In addition, the bending structure has a relatively large surface area compared with a flat structure, thereby increasing the contact area with air and improving the heat dissipation effect. If the flange edge of the battery directly contacts the contact surface, the flange edge is relatively thin, and the contact and support strength between the flange edge and the contact surface is insufficient. The bending structure is connected to the edge of the battery body, and the bending structure has a relatively large support strength compared with the flange edge. The bending structure has a bearing surface for supporting the battery body, thereby improving the stability of the contact between the battery body and the contact surface. BRIEF DESCRIPTION OF DRAWINGS

[0010] For a better understanding of the present disclosure, reference can be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements can be omitted in order to emphasize and clarify the technical features of the present disclosure. In addition, related elements or components can have different settings as known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various drawings. Among them:

[0011] Figure 1 is a structural diagram of a battery according to a first example embodiment Figure One ;

[0012] Figure 2 is a structural diagram of a battery according to a first example embodiment Figure Two ;

[0013] Figure 3 is a structural diagram of a battery according to a first example embodiment Figure Three ;

[0014] Figure 4 is a structural diagram of a battery according to a second example embodiment Figure One ;

[0015] Figure 5 is a structural diagram of a battery according to a second example embodiment Figure Two ;

[0016] Figure 6 is a structural diagram of a battery according to a second example embodiment Figure Three ;

[0017] Figure 7is a structural schematic of a battery according to the third example embodiment Figure One ;

[0018] Figure 8 is a structural schematic of a battery according to the third example embodiment Figure Two ;

[0019] Figure 9 is a structural schematic of a battery according to the third example embodiment Figure Three ;

[0020] Figure 10 is a structural schematic of a battery according to the fourth example embodiment Figure One ;

[0021] Figure 11 is a structural schematic of a battery according to the fourth example embodiment Figure Two .

[0022] The following is a description of the drawings:

[0023] 100, battery box;

[0024] 1, battery body; 2, bending structure; 3, support part; 4, exhaust passage; 5, limiting part;

[0025] 21, extension part; 22, bearing part; 23, gap. DETAILED DESCRIPTION

[0026] The technical solutions in the example embodiments of the present disclosure will be described clearly and completely in the following with reference to the drawings in the example embodiments of the present disclosure. The example embodiments described herein are only for illustrative purposes, and are not intended to limit the protection scope of the present disclosure, so it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0027] In the description of the present disclosure, unless explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" means two or more; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0028] Unless otherwise defined or specified, the terms "connected", "fixed", and the like should be interpreted broadly, for example, "connected" can be fixed connection, or detachable connection, or integrally connected, or electrically connected, or signal connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0029] Further, in the description of the present disclosure, it should be understood that the orientation terms such as "upper", "lower", "inner", "outer" and the like described in the example embodiments of the present disclosure are described with respect to the angle shown in the drawings, and should not be understood as a limitation on the example embodiments of the present disclosure. It should also be understood that, in context, when referring to an element or feature connected to another element (one or more) "on", "under", or "inner", "outer", it can not only be directly connected to the other (one or more) element "on", "under", or "inner", "outer", but also indirectly connected to the other (one or more) element "on", "under", or "inner", "outer" through an intermediate element.

[0030] One embodiment of the present application provides a battery, as shown in the figure, the battery comprises a battery body 1 and a bending structure 2, the bending structure 2 is at least partially connected to the edge of the battery body 1, and the bending structure 2 is used for supporting and dissipating heat of the battery body 1. Figures 1-3 The present embodiment provides a battery, which is connected to the edge of the battery body 1 through the bending structure 2, which is equivalent to the extension of the bending structure 2 along the edge of the battery body 1, increasing the surface area of the battery body 1. Since the battery will emit a large amount of heat during actual use, the bending structure 2 acts as an extension structure of the battery body 1 to dissipate heat, and the bending structure 2 has a relatively large surface area compared with a flat structure, increasing the contact area with air, and having good heat dissipation effect. If the flange edge and the contact surface of the battery are directly contacted, since the flange edge is relatively thin, there is a problem of insufficient contact and support strength between the flange edge and the contact surface. By connecting the bending structure 2 to the edge of the battery body 1, the bending structure 2 has a relatively large support strength compared with the flange edge, and the bending structure 2 has a bearing surface for supporting the battery body 1, improving the stability of the contact between the battery body 1 and the contact surface in contact therewith.

[0031] The battery body 1 comprises a battery cell and an electrolyte, and is a minimum unit capable of electrochemical reactions such as charging / discharging. The battery cell refers to a unit formed by winding or laminating a stacked portion comprising a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarity of the first electrode and the second electrode can be interchangeable.

[0032]

[0033] ​In one embodiment, the battery body 1 is a laminated battery, which is not only convenient to group, but also can be processed to obtain a battery body with a relatively long length.

[0034] Specifically, the battery cell is a laminated battery cell, which has a first electrode sheet, a second electrode sheet opposite to the first electrode sheet in electrical property, and a diaphragm sheet arranged between the first electrode sheet and the second electrode sheet, so that a plurality of pairs of the first electrode sheet and the second electrode sheet are stacked to form the laminated battery cell.

[0035] Optionally, the battery body 1 can be a wound battery, that is, the first electrode sheet, the second electrode sheet opposite to the first electrode sheet in electrical property, and the diaphragm sheet arranged between the first electrode sheet and the second electrode sheet are wound to obtain a wound battery cell.

[0036] In one embodiment, the battery body 1 is a square battery.

[0037] It should be particularly noted that the battery body 1 has a shape similar to a cuboid structure, the length direction of the battery body 1 is defined as a first direction, the width direction of the battery body 1 is defined as a second direction, and the height direction of the battery body 1 is defined as a third direction, which is also the height direction of the battery body 1. The first direction, the second direction, and the third direction are perpendicular to each other, and the first direction, the second direction, and the third direction only represent spatial directions and have no substantial meaning.

[0038] Specifically, the battery body 1 has two first side surfaces oppositely arranged along the first direction and four second side surfaces connected at the ends, the second side surfaces are arranged between the two first side surfaces, the two first side surfaces are arranged on both sides of the battery body 1 along the second direction, the surface area of the first side surface is greater than that of the second side surface, and the first side surface can also be referred to as a large surface.

[0039] It should be particularly noted that a flange is arranged at the edge of the battery body 1, and the flange is a ring-shaped structure arranged around the battery body 1. Specifically, the flange is arranged at the edge of one of the first side surfaces of the battery body 1. In the third direction, the part of the flange protruding from the top of the battery body 1 can be used for limiting the battery body 1 and other fixing members; in the third direction, the part of the flange protruding from the bottom of the battery body 1 can be used for supporting the battery body 1.

[0040] Since the width of the flange in the second direction is relatively small, it is difficult to support the battery body 1, and the part of the battery body 1 without the flange at the bottom is in a suspended state, which may also cause the battery body 1 to fall over. Therefore, the part of the flange protruding from the bottom of the battery body 1 can be bent to form the above-mentioned bending structure 2, which is equivalent to borrowing the existing flange of the battery body 1 and improving it, taking local materials, and having a relatively low improvement cost.

[0041] In one embodiment, the battery body 1 and the bending structure 2 are integrally formed. By virtue of the flange structure of the battery body 1 itself, the support and heat dissipation of the battery body 1 itself are realized, the links of parts and components are reduced, and the production cost is relatively low.

[0042] In one embodiment, as shown in Figures 1-3 the bending structure 2 comprises an extension part 21 and a bearing part 22, one end of the extension part 21 is connected to the edge of the battery body 1, the other end is connected to the bearing part 22, and the bearing part 22 is used for supporting the battery body 1; wherein the extension part 21 and the bearing part 22 are arranged at an angle.

[0043] By virtue of the fact that one end of the extension part 21 is connected to the edge of the battery body 1 and the other end is connected to the bearing part 22, the extension part 21 plays a role in connecting the edge of the battery body 1 and the bearing part 22, and plays a role in extending the edge of the battery body 1. By virtue of the fact that the extension part 21 and the bearing part 22 are arranged at an angle, the extension part 21 and the bearing part 22 are not on the same plane, i.e. the bearing part 22 is bent relative to the extension part 21, the bearing part 22 is used for supporting the battery body 1, and the support strength of the battery body 1 is increased.

[0044] It can be understood that the width b of the bearing part 22 along the second direction can be less than or equal to the width B of the battery body 1 along the second direction. Specifically, 0.5≤b / B≤1. If the value of b / B is less than 0.5, the value of b / B is too small, which means that the width b of the bearing part 22 along the second direction is relatively small, and a large range of the bottom of the battery body 1 can be suspended, and the side of the suspension can be inclined downward, which is difficult to guarantee the support effect of the battery body 1. If the value of b / B is too large, which means that the width b of the bearing part 22 along the second direction is greater than 1.1, the value of b / B is relatively large, and the edge of the bearing part 22 can exceed the first side surface of the battery body 1. At this time, the part of the bearing part 22 that exceeds can interfere with the adjacent battery body 1. If the value of b / B is equal to 1, it means that the edge of the bearing part 22 is flush with the first side surface of the battery body 1. However, it can also exceed a certain amount, because there is a buffer pad between the two adjacent battery bodies 1, and the part that exceeds is used to accommodate the buffer pad, and the thickness of the buffer pad is about 1 / 10 of the battery body 1.

[0045] In one embodiment, the extension part 21 and the bearing part 22 are arranged perpendicular to each other, i.e. the angle between the extension part 21 and the bearing part 22 is 90°. By virtue of the fact that the extension part 21 and the bearing part 22 are arranged perpendicular to each other, an L-shaped structure is formed, and at this time the bearing part 22 is equivalent to a support leg of the battery body 1, and the support strength is good.

[0046] In one embodiment, a gap 23 is provided between the battery body 1 and the corresponding bending structure 2, and the gap 23 is used for heat dissipation of the battery body 1. In other words, the height of the extension part 21 along the third direction is relatively large, and the side where the bearing part 22 and the battery body 1 are close to each other has a certain distance. At this time, the gap 23 is formed between the battery body 1 and the corresponding bending structure 2, and the first side of the battery body 1 where the bending structure 2 is not provided and the bearing part 22 form an opening structure. The heat generated by the battery body 1 enters the gap 23 and can be exhausted from the opening structure, thereby ensuring the timeliness and effectiveness of the heat dissipation of the battery body 1.

[0047] In one embodiment, the height of the extension part 21 along the third direction is relatively small, and the side where the bearing part 22 and the battery body 1 are close to each other is at least partially attached. The top surface of the bearing part 22 along the third direction is at least partially attached to the battery body 1, and the bottom of the bearing part 22 directly contacts the contact surface along the third direction. At this time, the distance between the bearing part 22 and the battery body 1 is relatively small, and they are approximately attached to each other. The bearing part 22 can directly support the battery body 1, reducing the situation that the bottom part of the battery body 1 is suspended and unstable in position.

[0048] In one embodiment, as shown in Figures 4-6 The battery further includes a support part 3 provided between the battery body 1 and the bending structure 2, and the support part 3 is used to support the battery body 1. By providing the support part 3 between the battery body 1 and the bending structure 2, the support part 3 fills the space between the battery body 1 and the bending structure 2, and assists in supporting the bending structure 2. Along the third direction, the bottom of the support part 3 is provided on the top surface of the bearing surface, and the top of the support part 3 directly abuts the second side of the battery body 1. The support part 3 acts as a support column, avoiding the situation that the bottom of the battery body 1 is suspended and unstable in position, and further ensuring the support effect on the battery body 1.

[0049] In one embodiment, as shown in Figures 5-6 An exhaust passage 4 is formed between the battery body 1, the bending structure 2 and the support part 3, and the exhaust passage 4 is used for heat dissipation of the battery body 1. In other words, the side of the support part 3 along the second direction is not attached to the extension part 21 of the bending structure 2, but there is a certain gap between the support part 3 and the extension part 21. The gap forms at least part of the exhaust passage 4, so that the heat generated by the battery body 1 can be discharged through the exhaust passage 4. In this way, while ensuring the support effect of the support part 3 on the battery body 1, a good heat dissipation effect on the battery body 1 can also be ensured.

[0050] In one embodiment, the support part 3 is provided with a heat dissipation structure, or the support part 3 is a heat dissipation structure.

[0051] The support part 3 is provided with a heat dissipation structure, which provides a containing space for the heat dissipation structure while supporting the battery body 1. The support part 3 is a shell structure, which fills the heat dissipation structure in the cavity of the support part 3, protects the heat dissipation structure, and avoids damage to the heat dissipation structure due to external force. The support part 3 has the functions of supporting and dissipating heat at the same time, which is a multi-functional structure.

[0052] In one embodiment, the heat dissipation structure is made of a phase change material.

[0053] The phase change material refers to a substance that changes its state without changing its temperature and can provide latent heat. The process of changing physical properties is called phase change process, at which time the phase change material will absorb or release a large amount of latent heat. The phase change material can actually be used as an energy storage device. In the two phase change processes, the energy stored or released is called phase change latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged before the phase change is completed, forming a wide temperature platform. Although the temperature does not change, the latent heat absorbed or released is quite large, and the phase change material has the advantages of energy saving and environmental protection.

[0054] The heat dissipation structure is made of a phase change material. When the temperature of the battery body 1 is too high, the phase change material can absorb the heat generated by the battery body 1, play a role in dissipating heat of the battery body 1, and avoid damage caused by high temperature of the battery body 1. When the temperature of the battery body 1 is too low, the phase change material can release heat to the battery body 1, play a role in heating and heat preservation of the battery body 1, and avoid the influence of low heat of the battery body 1 on the use performance of the battery body 1.

[0055] It should be noted that there can be only an exhaust passage 4 between the battery body 1 and the bending structure 2, or only a heat dissipation structure between the battery body 1 and the bending structure 2, or both the exhaust passage 4 and the heat dissipation structure between the battery body 1 and the bending structure 2. The bearing part 22 of the battery body 1 and the bending structure 2 can be cooled by the exhaust passage 4 and the heat dissipation structure respectively, that is, each position of the second side surface can be cooled well, and the cooling effect is good.

[0056] In one embodiment, as shown in Figures 7-9 The battery further includes a limiting part 5 connected to the end of the bending structure 2 away from the battery body 1, which limits the support part 3.

[0057] Since the support part 3 is arranged between the battery body 1 and the bending structure 2, the side of the support part 3 along the second direction can be limited by the extension part 21 of the bending structure 2, and the other side of the support part 3 along the second direction can be limited by the limiting part 5 connected to the end of the bending structure 2 away from the battery body 1, that is, the limiting part 5 is arranged at the tail end of the bearing part 22, and the limiting part 5 plays the role of a baffle to avoid the support part 3 from being extruded out of the opening structure under the gravity of the battery body 1 or external pressure, thereby ensuring the stability of the support part 3.

[0058] It can be understood that the bending structure 2 and the limiting part 5 form a U-shaped structure at this time, the U-shaped structure provides a containing space for the support part 3, and the side wall of the U-shaped structure limits the support part 3. The support part 3 can be spaced apart from the U-shaped structure, or the support part 3 can be closely attached to the U-shaped structure to fill the U-shaped structure, and the embodiments are not limited in these forms, which can be adjusted according to actual production needs.

[0059] In an embodiment, the bending structure 2 and the limiting part 5 are integrally formed. By arranging the bending structure 2 and the limiting part 5 to be integrally formed, the parts assembly and assembly steps are reduced, and the production cost is saved. Specifically, the part of the flange edge beyond the bottom of the battery body 1 is extended along the third direction to form the extension part 21, then the extension part 21 is bent by 90° along the second direction to form the bearing part 22, and finally the tail of the bearing part 22 is bent by 90° upward along the third direction to form the limiting part 5. In this way, the bending structure 2 and the limiting part 5 can be manufactured by two bending processes, and the production process is simple and the operability is strong.

[0060] In an embodiment, the side of the limiting part 5 close to the battery body 1 abuts against each other, and the limiting part 5 is used to support the battery body 1.

[0061] It can be understood that the side of the limiting part 5 close to the battery body 1 can be spaced apart, or the side of the limiting part 5 close to the battery body 1 can abut against each other. At this time, the top of the limiting part 5 along the third direction directly contacts the battery body 1, the limiting part 5 bears the battery body 1, and the limiting part 5 plays the role of auxiliary support for the battery body 1, so that the limiting part 5 has the dual functions of limiting the support part 3 and supporting the battery body 1, and the functionality is relatively strong.

[0062] In an embodiment, the side of the battery body 1 and the corresponding bending structure 2 are at least partially arranged opposite to each other; and / or, the battery body 1 and the corresponding bending structure 2 adjacent to the battery body 1 are at least partially arranged opposite to each other.

[0063] If the side of the battery body 1 and the bending structure 2 corresponding thereto are arranged at least partially in direct contact, i.e. the bending structure 2 extending from the battery body 1 itself can be used for the support of the previous battery body 1 or the support of the next battery body 1. In other words, the projection of the battery body 1 and the projection of the bending structure 2 corresponding to the battery body 1 adjacent thereto at least partially coincide, i.e. the bending structure 2 can realize the partial support or the full support of the bottom of the previous battery body 1, or the bending structure 2 can realize the partial support or the full support of the bottom of the next battery body 1.

[0064] If the side of the battery body 1 and the bending structure 2 corresponding thereto are arranged at least partially in direct contact, i.e. the bending structure 2 extending from the battery body 1 itself can be used for the support of the previous battery body 1 or the support of the next battery body 1. In other words, the projection of the battery body 1 and the projection of the bending structure 2 corresponding to the battery body 1 adjacent thereto at least partially coincide, i.e. the bending structure 2 can realize the partial support or the full support of the bottom of the previous battery body 1, or the bending structure 2 can realize the partial support or the full support of the bottom of the next battery body 1.

[0065] In one embodiment, as shown in FIG. 1, the battery body 1 is arranged on the bending structure 2 corresponding thereto; and / or, the battery body 1 is arranged on the bending structure 2 corresponding to the battery body 1 adjacent thereto. Figures 10-11

[0066] If the battery body 1 is arranged on the bending structure 2 corresponding thereto, the battery body 1 and the side of the bending structure 2 corresponding thereto close to each other are in close contact with each other, and the gravity of the battery body 1 itself provides a pressing force for the bending structure 2, thereby improving the fixing effect.

[0067] It should be particularly noted that when the battery body 1 is arranged on the bending structure 2 corresponding thereto, and the battery body 1 is arranged on the bending structure 2 corresponding to the battery body 1 adjacent thereto, the following two cases can exist:

[0068] Firstly, in the second direction, the width of the bending structure 2 corresponding to the battery body 1 is approximately equal to the width of the battery body 1, and the width of the bending structure 2 corresponding to the battery body 1 adjacent thereto is approximately equal to the width of the battery body 1, at this time, it is equivalent to that two bending structures 2 are arranged at the bottom of the battery body 1 in the third direction, i.e. the bottom of the battery body 1 has a double-layer structure, and the two bending structures 2 come from the bending structure 2 of the battery body 1 itself and the bending structure 2 of the battery body 1 adjacent thereto.

[0069] ​Second, in the second direction, the width of the bending structure 2 corresponding to the battery body 1 is approximately equal to half the width of the battery body 1, and the width of the bending structure 2 corresponding to the battery body 1 adjacent to the battery body 1 is approximately equal to half the width of the battery body 1. At this time, it is equivalent to two bending structures 2 being pressed at the bottom of the battery body 1 in the third direction, and the two bending structures 2 are respectively from the bending structure 2 of the battery body 1 itself and the bending structure 2 of the battery body 1 adjacent to the battery body 1, and the two bending structures 2 are abutted and spliced to equal the width of one battery body 1, that is, the bottom of the battery body 1 has a single-layer structure.

[0070] It needs to be specially pointed out that for the second kind, the two bending structures 2 can abut each other to achieve the effect of splicing; or the free ends of the two bending structures 2 can be stacked on each other to achieve the effect of lapping; or there is a certain gap between the free ends of the two bending structures 2 to achieve the effect of gap fit.

[0071] It needs to be specially pointed out that for the second kind, the widths of the two bending structures 2 can be the same or different, as long as the sum of the widths of the two bending structures 2 after lapping or splicing is less than the width of the battery body 1.

[0072] It needs to be specially pointed out that no matter the first kind or the second kind, the part close to each other of the two bending structures 2 needs to be provided with an insulating structure to avoid short circuit.

[0073] As shown in Figures 10-11 If the battery body 1 is pressed on the bending structure 2 corresponding to the battery body 1 adjacent to it, the battery body 1 and the bending structure 2 corresponding to the battery body 1 adjacent to it are close to each other on one side and abut each other, at this time, the bending structure 2 is bent away from the battery body 1, and the gravity of the previous battery body 1 provides a pressing force for the bending structure 2, that is, the previous battery body 1 is pressed on the bending structure 2, and the multiple battery bodies 1 press the bending structure 2 extending from the next battery body 1 in turn, thereby improving the connection strength.

[0074] It needs to be specially pointed out that when the multiple battery bodies 1 press the bending structure 2 extending from the next battery body 1 in turn, glue needs to be applied between the battery body 1 and the bending structure 2 to improve the fixing effect. The glue is specifically insulating fixing glue or heat-conducting and insulating structure glue, which has at least one of the multiple functions of fixing, heat conduction and insulation.

[0075] In one embodiment, at least one of the side where the bending structure 2 and the battery body 1 are close to each other is provided with an insulating part. The insulating part realizes the insulation between the bending structure 2 and the battery body 1, avoiding short circuit and the like. In particular, when a plurality of battery bodies 1 press the bending structure 2 extending from the next battery body 1 in turn, if no insulating part is provided between the battery body 1 and the bending structure 2 at this time, when the side of the battery body 1 is damaged by foreign matter, the previous battery body 1 may affect the next battery under the action of the bending structure 2 in the middle, thereby causing a serious risk of chain out-of-control, avoiding short circuit and ensuring the safety of the battery body 1 device.

[0076] In one embodiment, at least one of the side where the bending structure 2 and the battery body 1 are close to each other is provided with an insulating part. The insulating part realizes the insulation between the bending structure 2 and the battery body 1, avoiding short circuit and the like. In particular, when a plurality of battery bodies 1 press the bending structure 2 extending from the next battery body 1 in turn, if no insulating part is provided between the battery body 1 and the bending structure 2 at this time, when the side of the battery body 1 is damaged by foreign matter, the previous battery body 1 may affect the next battery under the action of the bending structure 2 in the middle, thereby causing a serious risk of chain out-of-control, avoiding short circuit and ensuring the safety of the battery body 1 device.

[0077] If the insulating coating on the battery body 1 is easily scratched, resulting in insulation failure. The insulating film can be pasted on the side of the battery body 1, which has excellent high-temperature insulation performance, and can still maintain normal insulation performance when the battery body 1 is out of control and short-circuits, reducing the risk of thermal runaway and short-circuit of the battery body 1.

[0078] It should be noted that in some embodiments, the bending structure 2 is provided on both sides of the battery body 1 along the second direction, that is, for each battery body 1, two bending structures 2 are bent from the edge of the battery body 1 to both sides along the second direction, one of which is used to support and dissipate heat for the battery body 1, and the other is used to support and dissipate heat for the previous or next battery body 1 adjacent to the battery body 1.

[0079] The embodiment also provides a battery device comprising the above-mentioned battery. The bending structure 2 is connected to the edge of the battery body 1, which is equivalent to the bending structure 2 extending along the edge of the battery body 1, increasing the surface area of the battery body 1. Since the battery will emit a large amount of heat during actual use, the bending structure 2 acts as an extension of the battery body 1 to dissipate heat, and the bending structure 2 has a relatively large surface area compared to a flat structure, increasing the contact surface with air and improving the heat dissipation effect. If the flange edge and the contact surface of the battery are directly contacted, since the flange edge is relatively thin, there is a problem of insufficient contact and support strength between the flange edge and the contact surface. By connecting the bending structure 2 to the edge of the battery body 1, the support strength of the bending structure 2 is relatively large compared to the flange edge, and the bending structure 2 has a bearing surface for supporting the battery body 1, improving the smoothness of the contact between the battery body 1 and the contact surface in contact therewith.

[0080] In one embodiment, the battery device further comprises a battery box 100, and the bending structure 2 of the battery is arranged on the battery box 100, and the battery box 100 serves to accommodate and protect the battery.

[0081] Specifically, the battery box 100 comprises a bottom plate assembly and a frame, the bottom plate assembly serves to support the battery and functions as a support for the battery, and the frame is arranged on the bottom plate assembly and surrounds the battery and functions as a side protection for the battery. The bottom plate assembly comprises a lower bottom plate, a liquid cooling plate and a bottom guard plate. If the bending structure 2 of the battery body 1 can be directly arranged on the lower bottom plate, the top surface of the lower bottom plate is the contact surface in contact with the bending structure 2 of the battery. If the bending structure 2 of the battery body 1 can be directly arranged on the liquid cooling plate, the top surface of the liquid cooling plate is the contact surface in contact with the bending structure 2 of the battery.

[0082] The battery device provided in the embodiment can first place the limiting part 5 on the bending structure 2 when assembling, so that the battery body 1, the bending structure 2 and the limiting part 5 form an integral structure, and then stack the plurality of battery bodies 1 in the second direction into the battery box 100, or first stack the plurality of battery bodies 1 in the second direction into the battery box 100, and then correspondingly arrange the plurality of limiting parts 5 on the bending structure 2 corresponding to the plurality of battery bodies 1. The assembling order of the battery body 1 and the limiting part 5 is not limited in the embodiment, and can be adjusted according to actual production needs.

[0083] In one embodiment, the battery device is a battery module, and the battery module comprises a plurality of batteries, and the battery module can further comprise an end plate and a side plate, and the end plate and the side plate serve to fix the plurality of batteries.

[0084] In one embodiment, the battery pack is a battery pack. The battery box 100 is provided with the battery, and the battery box 100 serves to protect the battery.

[0085] It should be noted that when the number of batteries is a plurality, the plurality of batteries can be arranged to form a group of batteries along the battery stacking direction in the battery box 100, and the plurality of batteries can be fixed by the end plate and the side plate. When the plurality of batteries are directly arranged in the battery box 100, i.e., the plurality of batteries do not need to be grouped, the end plate and the side plate can be removed.

[0086] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The disclosure is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the disclosure are indicated by the appended claims.

[0087] It should be understood that the present disclosure is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery, characterized by, The battery body (1) comprises a cell and an electrolyte, the cell comprises a stacking part, the stacking part comprises a first electrode, a separator and a second electrode; a flange is arranged at the edge of one of the first side faces of the battery body (1); the flange is bent along the third direction to form the bending structure (2) which is used for supporting the battery body (1); the battery body (1) and the bending structure (2) are integrally formed; the bending structure (2) comprises an extension part (21) and a bearing part (22), one end of the extension part (21) is connected to the edge of the battery body (1), the other end is connected to the bearing part (22), the bearing part (22) is used for supporting the battery body (1), and the width b of the bearing part (22) along the second direction is less than or equal to the width B of the battery body (1) along the second direction. The battery body (1) is arranged on the bending structure (2) corresponding thereto; and / or, The battery body (1) is arranged on the bending structure (2) corresponding to the adjacent battery body (1). At least one of the side faces of the bending structure (2) and the battery body (1) close to each other is provided with an insulating part.

2. The battery of claim 1, wherein, A gap (23) is arranged between the battery body (1) and the bending structure (2) corresponding thereto, and the gap (23) is used for heat dissipation of the battery body (1). The extension part (21) and the bearing part (22) are arranged at an angle.

3. The battery of claim 1, wherein, The extension part (21) and the bearing part (22) are arranged perpendicular to each other.

4. The battery of claim 1, wherein, A support part (3) is further arranged between the battery body (1) and the bending structure (2), and the support part (3) is used for supporting the battery body (1).

5. The battery of claim 1, wherein, The support part (3) is provided with a heat dissipation structure, or the support part (3) is a heat dissipation structure.

6. The battery of claim 5, wherein, The heat dissipation structure is made of a phase change material.

7. The battery of claim 1, wherein, An exhaust channel (4) is formed between the battery body (1), the bending structure (2) and the support part (3), and the exhaust channel (4) is used for heat emission of the battery body (1).

8. The battery of claim 7, wherein, A limiting part (5) is further arranged at the end of the bending structure (2) away from the battery body (1), and the limiting part (5) is used for limiting the support part (3).

9. The battery of claim 8, wherein, The limiting part (5) and the battery body (1) abut against each other at the side close to each other, and the limiting part (5) is used for supporting the battery body (1).

10. The battery of claim 7, wherein, The bending structure (2) and the limiting part (5) are integrally formed.

11. The battery of claim 7, wherein, At least part of the side face of the battery body (1) and the bending structure (2) corresponding thereto are arranged opposite to each other; and / or, 12. The battery of claim 11, wherein, ​ 13. The battery of claim 11, wherein, ​ 14. The battery of any one of claims 1-13, wherein, ​ The battery body (1) and the bending structure (2) corresponding to the battery body (1) adjacent thereto are at least partially arranged in direct opposition.

15. A battery device characterized by comprising: The battery comprises the battery body (1) and the bending structure (2) corresponding to the battery body (1).

16. The battery device of claim 15, wherein, The battery further comprises a battery box (100), and the bending structure (2) of the battery is arranged on the battery box (100).

Images