Battery and electric equipment

Abstract

The utility model relates to a battery and electric equipment, the battery comprises a battery monomer and a heat exchange member, a heat conduction member is attached between the battery monomer and the heat exchange member, and the heat conduction member is configured to have elasticity so as to be compressed when the battery monomer expands. The elastic heat conduction piece is arranged between the heat exchange piece and the battery monomer in an attached manner, so that the expansion of the battery monomer is absorbed by the heat conduction piece. Moreover, under the elastic action of the heat conduction pieces, the heat conduction pieces can be always in contact with the battery monomers and the heat exchange pieces, so that the thermal resistance between the battery monomers and the heat exchange pieces and between the heat conduction pieces is not increased in the whole life cycle of the battery, and the heat conduction pieces and the heat exchange pieces are combined to fully exchange heat for the battery monomers. According to the battery disclosed by the embodiment of the invention, the thermal management performance of the battery is ensured while the expansion of the battery monomers can be absorbed.

Description

TECHNICAL FIELD

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

[0002] In the related art, the battery expansion is absorbed by the heat exchange plate. After the battery is charged and expands, the heat exchange plate is flattened. However, when the battery is discharged and the expansion decreases, the heat exchange plate may be plastically deformed, so that it cannot well fit the battery monomer. This will cause irregular air gaps between the battery monomer and the heat exchange plate, increase the thermal resistance therebetween, and affect the heat transfer effect between the battery and the heat exchange plate. SUMMARY

[0003] To overcome the problems in the related art, the present disclosure provides a battery and a power consumption device.

[0004] According to a first aspect of an embodiment of the present disclosure, a battery is provided, comprising a battery monomer and a heat exchange member, wherein a heat conduction member is arranged between the battery monomer and the heat exchange member, and the heat conduction member is configured to have elasticity to be compressed when the battery monomer expands.

[0005] Optionally, the battery monomer comprises two large faces opposite in the thickness direction, and at least one of the large faces is attached with the heat conduction member.

[0006] Optionally, two sides of the heat conduction member are bonded with the battery monomer and the heat exchange member, respectively.

[0007] Optionally, the heat conduction member is configured to have a shear strength not less than 3 MPa and a tear resistance relative to the battery monomer not less than 3 MPa.

[0008] Optionally, the heat conduction member is configured to have a compression stress M2 not greater than an expansion stress M1 of the battery monomer.

[0009] Optionally, in a first direction, an elastic modulus W1 of the heat exchange member is greater than an elastic modulus W2 of the heat conduction member, and the first direction is perpendicular to a side of the battery monomer for attaching the heat conduction member.

[0010] Optionally, a ratio of a capacity Q1 of the battery monomer to a size L1 of the heat conduction member in a first direction is configured as 17.2 Ah / mm≤Q1 / L1≤547.3 Ah / mm, and the first direction is perpendicular to a side of the battery monomer for attaching the heat conduction member.

[0011] Optionally, the heat conduction member comprises a foamed body and heat conduction particles, the foamed body has foamed holes, and the heat conduction particles are filled in the foamed holes.

[0012] Optionally, the foam is made of a closed-cell micro-foam material or a semi-open-cell micro-foam material.

[0013] Optionally, the heat-conducting particles are made of an insulating material, and / or the outer surface of the heat-conducting member is provided with an insulating film.

[0014] Optionally, the voltage resistance level of the heat-conducting member is not less than 2700V.

[0015] Optionally, the thermal conductivity coefficient k2 of the insulating film is not less than the thermal conductivity coefficient k1 of the heat-conducting member.

[0016] Optionally, the thermal conductivity coefficient k1 of the heat-conducting member is not less than 0.05 W / m·K and not more than 8 W / m·K.

[0017] Optionally, the heat-exchanging member includes a cavity formed inside, the cavity being used for circulating a heat-exchanging medium, and a ratio of the capacity Q1 of the battery monomer to the cross-sectional area S2 of the cavity is configured as: 0.01 Ah / mm 2 ≤Q1 / S2≤500Ah / mm 2 .

[0018] Optionally, the battery monomer includes a shell and a winding core arranged in the shell, the shell including a mounting surface for arranging the heat-conducting member, wherein a ratio of the projected area S5 of the winding core on the mounting surface to the area S1 of the mounting surface is configured as: 0.5537≤S5 / S1≤0.9998, a ratio of the projected area S6 of the heat-exchanging member on the mounting surface to the area S1 of the mounting surface is configured as: 0.12≤S6 / S1≤1, and a ratio of the projected area S5 of the winding core on the mounting surface to the projected area S6 of the heat-exchanging member on the mounting surface is configured as: 0.5537≤S5 / S6≤8.3317.

[0019] Optionally, the battery monomer includes a shell and a winding core arranged in the shell, the shell including a mounting surface for arranging the heat-conducting member, wherein a ratio of the projected area S7 of the heat-conducting member on the mounting surface to the projected area S5 of the winding core on the mounting surface is configured as: 0.25≤S7 / S5≤2.

[0020] Optionally, the battery includes a plurality of the battery monomers, and the heat-exchanging member is arranged between two adjacent battery monomers, and the heat-exchanging member is provided with the heat-conducting member on both sides thereof.

[0021] According to a second aspect of the embodiments of the present disclosure, a power utilization device is provided, including the battery provided by the present disclosure.

[0022] The technical scheme provided by the embodiment of the present disclosure can have the following beneficial effects: by adhering the heat-conducting member with elasticity between the heat exchange member and the battery cell, the expansion of the battery cell is absorbed by the heat-conducting member. Moreover, the heat-conducting member can always keep in contact with the battery cell and the heat exchange member under the elasticity of the heat-conducting member, so that the thermal resistance between the battery cell, the heat exchange member and the heat-conducting member is not increased in the whole life cycle of the battery, and the heat-conducting member and the heat exchange member can fully exchange heat with the battery cell. The battery of the embodiment of the present disclosure can absorb the expansion of the battery cell while ensuring the thermal management performance of the battery.

[0023] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

[0025] Figure 1 is an exploded view of a battery according to an exemplary embodiment.

[0026] Figure 2 is an exploded view of a battery cell, a heat exchange member and a heat-conducting member according to an exemplary embodiment.

[0027] Figure 3 is an assembly view of a battery cell, a heat exchange member and a heat-conducting member according to an exemplary embodiment.

[0028] Figure 4 is an end side view of an assembly view of a battery cell and a heat-conducting member according to an exemplary embodiment.

[0029] Figure 5 is a mounting surface view of an assembly view of a battery cell, a heat-conducting member and a heat exchange member according to an exemplary embodiment.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 100 - battery, 10 - battery cell, 101 - large surface, 11 - shell, 12 - roll core, 20 - heat exchange member, 21 - cavity, 30 - heat-conducting member, 31 - adhesive part, 32 - insulating film. DETAILED DESCRIPTION

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0033] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0034] According to a first aspect of the embodiments of this disclosure, referring to Figure 1 A battery 100 is provided, which includes a battery cell 10 and a heat exchanger 20. The number of battery cells 10 can be multiple, and they can be arranged along... Figure 1 The arrangement is shown in the thickness or length direction. The heat exchanger 20 may include a liquid cooling plate through which coolant can flow, or it may be a direct cooling plate through which refrigerant can flow. This disclosure does not limit the specific configuration of the heat exchanger 20. A heat-conducting element 30 is attached between the battery cell 10 and the heat exchanger 20; that is, the heat-conducting element 30 is attached to the battery cell 10, and the side of the heat-conducting element 30 facing away from the battery cell 10 is attached to the heat exchanger 20, so that heat from the battery cell 10 can be transferred to the heat exchanger 20 for heat exchange. In this embodiment, in addition to its heat-conducting function, the heat-conducting element 30 is configured to be elastic, so that it can be compressed when the battery cell 10 expands. Furthermore, it is understood that due to its elasticity, the heat-conducting element 30 can also elastically return to its original position when the battery cell 10 expands and contracts.

[0035] Through the above technical solution, by attaching an elastic heat-conducting element 30 between the heat exchanger 20 and the battery cell 10, the expansion of the battery cell 10 is absorbed by the heat-conducting element 30. Furthermore, due to its elasticity, the heat-conducting element 30 maintains constant contact with both the battery cell 10 and the heat exchanger 20, ensuring that the thermal resistance between the battery cell 10, the heat exchanger 20, and the heat-conducting element 30 does not increase during battery use. The combination of the heat-conducting element 30 and the heat exchanger 20 allows for sufficient heat exchange with the battery cell 10. The battery of this embodiment can absorb the expansion of the battery cell 10 while ensuring the thermal management performance of the battery 100.

[0036] Reference Figure 2The battery monomer 10 includes two large faces 101 opposite in the thickness direction. In the embodiment of the present disclosure, the heat conduction member 30 can be attached to at least one large face 101. The large face 101 is the face with the largest surface area of the battery monomer 10, that is, the main position of the battery monomer 10 to swell, and the heat conduction member 30 arranged on the large face 101 can better absorb the swelling. Moreover, the heat exchange area of the large face 101 is large, and the heat exchange of the large face 101 through the heat conduction member 30 is facilitated, thereby improving the heat exchange efficiency of the battery 100.

[0037] In other embodiments, in combination with Figure 2 and Figure 3 The heat conduction member 30 can be arranged on both large faces to ensure that the swelling is absorbed to the greatest extent and the battery monomer 10 is heated or cooled. Alternatively, the heat conduction member 30 can also be arranged on other end faces of the battery monomer 10, which is not limited in the present disclosure.

[0038] When the battery 100 includes a plurality of battery monomers 10, in combination with Figure 3 The heat exchange member 20 is arranged between two adjacent battery monomers 10, and the heat conduction member 30 is arranged on both sides of the heat exchange member 20 facing the battery monomer 10. That is, the two adjacent battery monomers 10 can share the heat exchange member 20, so that the heat exchange member 20 is arranged between the two heat conduction members 30 to exchange heat with the adjacent battery monomers 10. In other words, two heat conduction members 30 and a heat exchange member arranged between the two heat conduction members 30 can be arranged between the two adjacent battery monomers 10. This arrangement can save space and improve space utilization. Moreover, when the battery monomer 10 on one side swells too much and exceeds the compression load of the heat conduction member 30, the swelling can also be absorbed by the heat conduction member 30 corresponding to the adjacent battery monomer 10, so as to ensure the close contact between the parts and reduce the thermal resistance.

[0039] In order to ensure that the entire battery pack system meets various mechanical working conditions, such as random vibration, impact and other working conditions, without structural failure problems, such as making the first-order modal of the battery pack system not less than 55 Hz, the battery 100 needs to have a certain structural strength. Specifically, the heat conduction member 30 itself needs to have a certain strength, and the connection between the heat conduction member 30 and other components needs to have a certain strength. In the embodiment of the present disclosure, one or more combinations of the following methods can be used to ensure this strength.

[0040] For example, the heat conduction member 30 can be bonded with the battery monomer 10 and the heat exchange member 20, respectively. Through the bonding method, the heat conduction member 30 and the battery monomer 10 and the heat exchange member 20 can have a certain connection strength. In addition, the bonding method can also ensure that there is no gap between the three, thereby avoiding increasing the thermal resistance between the three.

[0041] The adhesion can be achieved in various ways. In one embodiment, the heat-conducting member 30 can be made of a material with adhesion, such as a silicon-based material, which is adhesive by itself and thus can be adhered to the battery monomer 10 and the heat-exchanging member 20. Alternatively, in another embodiment, the heat-conducting member 30 itself is not adhesive, such as made of a polyurethane material, and the side of the heat-conducting member 30 used to contact the battery monomer 10 and the heat-exchanging member 20 is provided with an adhesive part 31, as shown in the figure. The adhesive part 31 can be made of a double-sided adhesive tape or any other material with adhesion, which will not be described in detail here. Figure 4

[0042] The heat-conducting member 30 can be designed in terms of its material and structure to have a shear strength of no less than 3 MPa, so as to ensure that the heat-conducting member 30 is not easily damaged or failed. In addition, the adhesion strength of the heat-conducting member 30 can be designed to have a tearing resistance of no less than 3 MPa relative to the battery monomer 10, so as to ensure that the heat-conducting member 30 is not easily torn from the battery monomer 10 and has a high connection strength.

[0043] The heat-conducting member 30 needs to be designed to minimize the mutual influence between its various functions, so as to ensure that each function can be performed to the ideal state. The good performance of the heat-conducting member 30 can be achieved by one or more of the above-mentioned means.

[0044] For example, the heat-conducting member 30 is attached to the large face 101. The area of the large face 101 is S1, and the maximum displacement of the battery monomer 10 can be measured by a test to obtain the expansion force F1. The expansion stress M1 of the battery monomer 10 is F1 / S1. When the battery monomer 10 has the maximum displacement, the compression stress M2 of the heat-conducting member 30 can be measured. In one embodiment, the heat-conducting member 30 can be configured to have a compression stress M1 no less than the expansion stress M2 of the battery monomer 10, so as to ensure that the expansion of the battery monomer 10 can cause the heat-conducting member 30 to be compressed, thereby realizing the function of the heat-conducting member 30 to completely absorb the expansion of the battery monomer 10.

[0045] In order to ensure that the heat-conducting member 30 deforms when the battery monomer 10 expands, while minimizing the deformation of the heat-exchanging member 20, and to ensure the reliability of the heat-exchanging member 20 and the performance of the battery 100, in the embodiment of the present disclosure, the elastic modulus W1 of the heat-exchanging member 20 is greater than the elastic modulus W2 of the heat-conducting member 30 in the first direction. The first direction is perpendicular to the side of the battery monomer 10 used to attach the heat-conducting member 30, i.e., the first direction is the thickness direction when the heat-conducting member 30 is installed on the large face 101.

[0046] ​In one embodiment, the dimension of the heat-conducting element 30 along the first direction is L1, the capacity of the battery cell 10 is Q1, and 17.2 Ah / mm ≤ Q1 / L1 ≤ 547.3 Ah / mm, wherein the first direction is perpendicular to the side of the battery cell 10 used to attach the heat-conducting element 30. When the heat-conducting element 30 is as follows... Figure 2 When the heat-conducting element 30 is attached to the large surface 101 of the battery cell 10, the first direction is the thickness direction. It is understood that the larger the dimension L1 of the heat-conducting element 30 along the first direction, the stronger its ability to absorb expansion. However, this also lengthens the heat transfer path of the battery cell 10, affecting its heat exchange efficiency and increasing its space requirements, which in turn affects the energy density of the entire battery pack. Therefore, within this ratio range, the heat-conducting element 30 can balance thermal conductivity and expansion absorption capabilities.

[0047] Extensive experimental verification has shown that if the ratio of the two is greater than 547.3 Ah / mm, the size L1 of the heat-conducting component 30 is too thin for the current battery cell 10, resulting in poor absorption of expansion and potentially causing deformation of the heat exchange component 20. If the ratio of the two is less than 17.2 Ah / mm, the size L1 of the heat-conducting component 30 is too thick for the current battery cell 10, leading to material redundancy and waste, and the excessive thickness also affects its thermal conductivity.

[0048] In this embodiment, the heat-conducting component 30 may include a foam body and heat-conducting particles. The foam body has foam pores, and the heat-conducting particles can fill the foam pores. It is understood that the foam body in the heat-conducting component 30 is elastic, compressible, and its function is to absorb expansion; the heat-conducting particles in the heat-conducting component 30 are used for heat conduction. The process of producing the heat-conducting component 30 may involve adding heat-conducting particles before foaming the foam body, then stirring to mix them evenly, and then foaming the evenly mixed raw materials to obtain the heat-conducting component 30.

[0049] The foam can be made of closed-cell micro-foamed material or semi-open-cell micro-foamed material. This material has good elasticity and is easy to compress, thereby effectively absorbing the expansion of the battery cell 10.

[0050] In one embodiment, the thermally conductive particles may be made of an insulating material to prevent the thermally conductive element 30 from becoming conductive and affecting the safety of the battery 100. For example, the thermally conductive particles may be made of ceramic or alumina materials.

[0051] In another embodiment, the heat-conducting particles can be made of a conductive metal material. In this case, to ensure the insulation of the heat-conducting element 30, an insulating film 32 can be provided on the outer surface of the heat-conducting element 30. The insulating film 32 can be formed on the surface of the heat-conducting element 30 by spraying, bonding, or other connection methods. Specifically, the insulating film 32 can be a polyimide film, which has excellent insulating properties. (Refer to...)Figure 4 When the heat conduction member 30 has the adhesive part 31, the insulating film 32 can be arranged inside the adhesive part 31, so that the adhesive part 31 is adhered on the outside, and the insulating film 32 can be fully covered to ensure effective insulation. In the embodiments of the present disclosure, the insulating heat conduction shell particles and the insulating film 32 can be used at the same time to achieve better insulation effect.

[0052] In the embodiments of the present disclosure, the voltage resistance grade of the heat conduction member 30 is not less than 2700V to ensure the safety performance of the battery 100.

[0053] When the insulating film 32 is arranged, in the embodiments of the present disclosure, the selection of the insulating film 32 and the heat conduction member 30 is such that the thermal conductivity k2 of the insulating film 32 is not less than the thermal conductivity k1 of the heat conduction member 30, so as to ensure that the insulating film 32 will not affect the heat conduction of the heat conduction particles inside it.

[0054] In the embodiments of the present disclosure, the thermal conductivity k1 of the heat conduction member 30 can be not less than 0.05W / m·K and not more than 8W / m·K, so as to ensure that the heat conduction member 30 can balance the heat conduction capacity and the expansion absorption capacity. It has been verified through a large number of experiments that when the thermal conductivity k1 is less than 0.05W / m·K, the heat conduction capacity of the heat conduction member 30 is insufficient, which cannot ensure the thermal management performance of the battery 100; when the thermal conductivity k1 is greater than 8W / m·K, it means that more heat conduction materials are filled, which will cause the compression capacity of the heat conduction member 30 to be correspondingly weakened, and thus cannot ensure effective expansion absorption.

[0055] In order to ensure the thermal management performance of the battery 100, the heat exchange member 20 needs to exert good heat exchange effect on the battery monomer 10, and therefore, the heat exchange member 20 can be designed from multiple angles to improve its heat exchange performance. Specifically, one or more of the following methods can be used.

[0056] The heat exchange member 20 can include a cavity 21 formed inside, and the cavity 21 is used for flowing heat exchange medium. In order to ensure that the cavity 21 can meet the heat exchange effect on the battery monomer 10, the cavity 21 can be designed according to the capacity of the battery monomer 10. For example, in the embodiments of the present disclosure, the ratio of the capacity Q1 of the battery monomer 10 to the cross-sectional area S2 of the cavity 21 satisfies: 0.01Ah / mm 2 ≤Q1 / S2≤500Ah / mm 2 It has been verified through a large number of experiments that when the ratio is less than 0.01Ah / mm 2 , the cross-sectional area of the cavity 21 is too large for the current capacity of the battery monomer 10, which causes the cavity 21 to be redundantly designed, so that the utilization rate of the heat exchange member 20 cannot be maximized; when the ratio is greater than 500Ah / mm 2At this time, the cross-sectional area of the cavity 21 is too small for the current battery monomer 10, and cannot play a good heat exchange effect, affecting the thermal management performance of the battery 100.

[0057] The heat exchange piece 20 can be provided with a spacing rib to space a plurality of cavities to increase the heat exchange area and facilitate control of the flow characteristics of the fluid to form a good flow field distribution. Moreover, the spacing rib can have a good supporting effect and is not easy to be compressed, so that the heat exchange piece 20 will not be compressed or deformed even under stress. The cross-sectional area S3 of the heat exchange piece 20 coplanar with the cross section of the cavity 21 can satisfy the following requirement: 75%≤S2 / S3≤98%. A large number of experiments have verified that when the ratio is less than 75%, the proportion of the cavity 21 in the heat exchange piece 20 is too small, and the heat exchange effect is poor; when the ratio is greater than 98%, the proportion of the cavity 21 in the heat exchange piece 20 is too large, resulting in a thin heat exchange piece 20 and poor overall strength, which is prone to deformation.

[0058] The cavity 21 is formed with a chamfer around the periphery to reduce the flow resistance of the fluid. The chamfer is set to be not less than 0.1 mm and not more than 5 mm. A large number of experiments have verified that when the chamfer is less than 0.1 mm, it is not smooth enough, and the effect of reducing the resistance is poor; when the chamfer is greater than 5 mm, the space occupied by the chamfer is too large, resulting in a smaller cross-sectional area of the cavity 21, which cannot meet the heat exchange effect well.

[0059] Reference Figure 5 The battery monomer 10 can include a shell 11 and a roll core 12 disposed in the shell 11, wherein the roll core 12 is an assembly formed by stacking positive electrode sheets, separators and negative electrode sheets in sequence, which can be stacked or wound. The shell 11 includes a mounting surface for setting the heat conduction piece 30, such as the large surface 101 described above. It should be noted that, Figure 5 The size ratio is not representative of the size ratio of the actual product.

[0060] The ratio of the projection area S5 of the roll core 12 on the mounting surface to the area S1 of the mounting surface satisfies: 0.5537≤S5 / S1≤0.9998. A large number of experiments have verified that when S5 / S1 is less than 0.5537, the heat exchange area of the roll core 12 cannot meet the heat exchange demand; when S5 / S1 is greater than 0.9998, the thickness of the shell 11 is too thin for the current roll core 12, and it is difficult to meet the strength requirement.

[0061] The ratio of the projected area S6 of the heat exchange element 20 on the mounting surface to the area S1 of the mounting surface satisfies: 0.12≤S6 / S1≤1. Through a large number of experiments, it is verified that when S6 / S1 is less than 0.12, the area of the heat exchange element 20 is difficult to guarantee the heat exchange effect for the current battery monomer 10; when S6 / S1 is greater than 1, the area of the heat exchange element 20 is greater than the area of the mounting surface of the battery monomer 10, causing the redundant design of the heat exchange element 20, not only wasting materials, but also occupying extra space.

[0062] The ratio of the projected area S5 of the winding core 12 on the mounting surface to the projected area S6 of the heat exchange element 20 on the mounting surface satisfies: 0.5537≤S5 / S6≤8.3317. Through a large number of experiments, it is verified that when S5 / S6 is less than 0.5537, the area of the heat exchange element 20 is too large for the current winding core 12, causing the redundant design of the heat exchange element 20, not only wasting materials, but also occupying extra space; when S5 / S6 is greater than 8.3317, the area of the heat exchange element 20 is too small for the current winding core 12, causing the heat exchange element 20 to be difficult to meet the heat dissipation demand of the winding core 12.

[0063] The ratio of the projected area S7 of the heat conduction element 30 on the mounting surface to the projected area S5 of the winding core 12 on the mounting surface satisfies: 0.25≤S7 / S5≤2. When S7 / S5 is less than 0.25, the heat conduction element 30 is too small in area for the current winding core 12, and the heat conduction effect is not good, thereby affecting the heat exchange effect and thermal management performance thereof; when S7 / S5 is greater than 2, the heat conduction element 30 is too large for the current winding core 12, causing the redundant design of the heat conduction element 30, not only wasting materials, but also occupying extra space.

[0064] According to a second aspect of the present embodiment, a power consuming device is provided, which includes the above-mentioned battery 100 and has all the beneficial effects of the battery 100, which will not be repeated here. The power consuming device can include a vehicle, a drone, etc.

[0065] In the above detailed description, reference is made to the accompanying drawings, which show by way of illustration specific aspects in which the disclosure can be practiced. In this regard, reference is made to the orientation of the described figures in using terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like to describe a direction or to indicate a positional relationship. Since the components of the described devices can be positioned in a number of different orientations, the directional terms can be used for purposes of illustration and not limitation. It will be appreciated that other aspects can be utilized and structural or logical changes can be made without departing from the concept of the present disclosure. Therefore, the following detailed description is not to be taken in a limiting sense.

[0066] It should be understood that the features of various of the disclosed embodiments described herein can be combined with each other, unless specifically noted otherwise. As used in this document, the term "and / or" includes any one of the listed items, as well as any combination of any two or more of the listed items; similarly, "at least one of" includes any one of the listed items, as well as any combination of any two or more of the listed items.

[0067] It should be understood that, unless otherwise specifically noted, the terms "engages," "attached," "mounted," "connected," "linked," "fixed," and the like, as used in the herein-disclosed embodiments, are to be construed broadly, and can be either direct or indirect, fixed or removable, and / or integral or separate. Additionally, such terminology is similarly intended to encompass the situations where the elements interact with each other, unless otherwise specifically noted. The specific meaning of such terms in a particular context will be apparent to those of ordinary skill in the art.

[0068] Further, the word "over" as used in the context of a component, element, or material layer "over" a surface is used herein to mean that the component, element, or material layer is positioned "indirectly" on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the word "over" as used in the context of a component, element, or material layer "over" a surface can optionally also have the specific meaning of the component, element, or material layer being positioned "directly" on the surface, e.g., in direct contact with the surface.

[0069] Although terms such as "first," "second," and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited to the three terms. Instead, these terms are only used to differentiate one element, component, region, layer or section from another element, component, region, layer or section. As such, a first element, component, region, layer or section referred to in one example described herein can also be referred to as a second element, component, region, layer or section, without departing from the teachings of the examples. Additionally, the terms "first," "second," are used only for descriptive purposes and do not imply or suggest relative importance or an indicated number of the technical features. Thus, features defined with "first," "second" can include at least one of the features explicitly or implicitly. In the description herein, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] It should be understood that spatially relative terms, such as "above," "upper," "below," and "lower," among others, are used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms are not intended to limit the position of the device to the orientation in the description. For example, if the device in the figures is turned over, then the element described as above other elements or features would now be oriented below the other element(s) or feature(s). Thus, the term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

[0071] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete manner. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless specified otherwise, or clear from context, "X employs A or B" is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then "X employs A or B" is satisfied under any of the foregoing instances. In addition, the articles "a" and "an" as used in this application and the appended claims should generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. Thus, use of the articles in this application and the following claims is not limiting.

[0072] Likewise, although the present disclosure has been described and illustrated with respect to one or more implementations, equivalent alterations and modifications will become apparent to those skilled in the art that do not depart from the true spirit and scope of the disclosure. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms (including a reference to a "means") used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the described function (e.g., a functional equivalent), even though not structurally equivalent to the disclosed structure. In addition, although a particular feature of the disclosure can have been disclosed with respect to only one of several implementations, other implementations can include the particular feature. For example, the features of one implementation can be combined with those of another implementation. Furthermore, although the foregoing has been described in some detail for purposes of clarity, it will be apparent that certain changes and modifications can be made which will affect the appended claims. For example, various implementations of the present disclosure have been described above. Each of these has aspects, which have been particularly emphasized so as not to obscure the disclosure. However, it will be apparent that aspects of the other implementations can be employed without departing from the scope of the disclosure. It is therefore contemplated to cover any and all modifications and variations of this disclosure. It is also expressly intended that claims can be combined one with another in any combination. In addition, it is intended that each limitation listed in the following claims is to be construed by the proper scope as would be given to an artisan reviewing the disclosure and the following claims.

[0073] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features of the disclosure disclosed herein. It is intended that the present disclosure be considered as examples only, with a true scope and spirit of the disclosure being indicated by the following claims.

[0074] It is to be understood that the present disclosure is not limited to the precise construction described and as shown in the attached figures, 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 claims that follow.

Claims

1. A battery, characterized by, The battery cell and the heat exchange element are provided with a heat conducting element therebetween, the heat conducting element is configured to have elasticity to be compressed when the battery cell expands, the elastic modulus W1 of the heat exchange element is greater than the elastic modulus W2 of the heat conducting element in a first direction perpendicular to the side of the battery cell for fitting the heat conducting element.

2. The battery of claim 1, wherein, The battery cell includes two opposite large faces along the thickness direction, and at least one of the large faces is provided with the heat conducting element.

3. The battery of claim 1, wherein, The two sides of the heat conducting element are bonded with the battery cell and the heat exchange element respectively.

4. The battery of claim 3, wherein, The heat conducting element is configured to have a shear strength not less than 3Mpa and a tear resistance not less than 3Mpa relative to the battery cell.

5. The battery of claim 1, wherein, The heat conducting element is configured to have a compression stress M2 not greater than the expansion stress M1 of the battery cell.

6. The battery of claim 1, wherein, The ratio of the capacity Q1 of the battery cell to the size L1 of the heat conducting element in the first direction is configured to be 17.2Ah / mm≤Q1 / L1≤547.3Ah / mm, and the first direction is perpendicular to the side of the battery cell for fitting the heat conducting element.

7. The battery of claim 1, wherein, The heat conducting element includes a foamed body and heat conducting particles, the foamed body has foamed holes, and the heat conducting particles are filled in the foamed holes.

8. The battery of claim 7, wherein, The foamed body is made of a closed-cell micro-foamed material or a semi-open-cell micro-foamed material.

9. The battery of claim 7, wherein, The heat conducting particles are made of an insulating material, and / or the outer surface of the heat conducting element is provided with an insulating film.

10. The battery of claim 9, wherein, The heat conducting element has a voltage resistance level not less than 2700V.

11. The battery of claim 7, wherein, The outer surface of the heat conducting element is provided with an insulating film, and the thermal conductivity coefficient k2 of the insulating film is not less than the thermal conductivity coefficient k1 of the heat conducting element.

12. The battery of claim 1, wherein, The thermal conductivity coefficient k1 of the heat conducting element is not less than 0.05W / m·K and not greater than 8W / m·K.

13. The battery of claim 1, wherein, The heat exchange element includes a cavity formed in the inside, the cavity is used for circulating heat exchange medium, and the ratio of the capacity Q1 of the battery cell to the cross-sectional area S2 of the cavity is configured to be 0.01Ah / mm2≤Q1 / S2≤500Ah / mm2.

14. The battery of claim 1, wherein, The battery cell includes a shell and a winding core arranged in the shell, the shell includes a mounting surface for arranging the heat conducting element, the ratio of the projection area S5 of the winding core on the mounting surface to the area S1 of the mounting surface is configured to be 0.5537≤S5 / S1≤0.9998, the ratio of the projection area S6 of the heat exchange element on the mounting surface to the area S1 of the mounting surface is configured to be 0.12≤S6 / S1≤1, and the ratio of the projection area S5 of the winding core on the mounting surface to the projection area S6 of the heat exchange element on the mounting surface is configured to be 0.5537≤S5 / S6≤8.3317.

15. The battery of claim 1, wherein, The battery cell includes a shell and a winding core arranged in the shell, the shell includes a mounting surface for arranging the heat conducting element, and the ratio of the projection area S7 of the heat conducting element on the mounting surface to the projection area S5 of the winding core on the mounting surface is configured to be 0.25≤S7 / S5≤2.

16. The battery of claim 1, wherein, The battery comprises a plurality of the battery monomers, and the heat exchange member is arranged between two adjacent battery monomers, and the heat exchange member is provided with the heat conduction member on both sides facing the battery monomers.

17. An electrical device, characterized by The battery comprises a plurality of the battery monomers, and the heat exchange member is arranged between two adjacent battery monomers, and the heat exchange member is provided with the heat conduction member on both sides facing the battery monomers.

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