Battery device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device. The battery device comprises a battery and a heat exchange structure, the at least two batteries are sequentially arranged in a first direction to form a battery column, each battery comprises a battery shell, each battery shell is provided with a first wall body and a second wall body which are connected with each other, the first wall bodies and the second wall bodies are arranged in a crossed manner, and the first wall bodies are provided with anti-explosion valves; the heat exchange structure comprises a first heat exchange plate and a second heat exchange plate which are connected with each other, the first heat exchange plate is in heat conduction contact with the first wall body, the second heat exchange plate is in heat conduction contact with at least part of the second wall body, and the orthographic projection of the heat exchange structure on the first reference plane is not overlapped with the orthographic projection of the anti-explosion valve on the first reference plane; the space, not provided with the first heat exchange plate, of the side, away from the battery, of the first wall body is the exhaust space of the battery, the exhaust spaces of the battery columns are sequentially communicated in the first direction, and the first reference plane is parallel to the first wall body. The battery device is high in heat exchange efficiency.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery device. Background Art

[0002] The batteries in the battery device will generate a lot of heat during the charging and discharging process. Currently, this heat is transferred and discharged through the heat exchange plate to avoid overheating of the battery and ensure the safety performance of the battery device.

[0003] However, the heat exchange efficiency of the heat exchange plate in the current battery device is low and cannot meet the heat dissipation requirements of fast charging.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies of the above-mentioned related technologies and provide a battery device.

[0006] According to one aspect of the present disclosure, there is provided a battery device, comprising:

[0007] At least two batteries are arranged in sequence along a first direction to form a battery column, the battery comprising a battery housing, the battery housing having a first wall and a second wall connected to each other, the first wall intersecting the second wall, and the first wall being provided with an explosion-proof valve;

[0008] A heat exchange structure comprises a first heat exchange plate and a second heat exchange plate connected to each other, the first heat exchange plate is in thermal contact with the first wall, the second heat exchange plate is in thermal contact with at least part of the second wall, the orthographic projection of the heat exchange structure on a first reference plane does not overlap with the orthographic projection of the explosion-proof valve on the first reference plane, a space on a side of the first wall away from the battery where the first heat exchange plate is not arranged is an exhaust space of the battery, the exhaust spaces of a row of the batteries are connected in sequence along the first direction, and the first reference plane is parallel to the first wall.

[0009] The battery device disclosed in the present invention, on the one hand, can dissipate heat from the first wall through the first heat exchange plate, and can dissipate heat from the second wall through the second heat exchange plate, thereby increasing the heat dissipation area of ​​the battery, thereby improving the thermal conductivity of the battery, so as to meet the heat dissipation requirements of fast charging and achieve high-rate super-fast charging; in the event of overheating of a battery, the generated heat can be quickly transferred out, reducing the thermal impact on other batteries, and achieving thermal suppression of a single battery. On the other hand, the heat exchange structure does not cover the explosion-proof valve, and in the event of overheating of the battery, it will not affect the explosion of the explosion-proof valve, and the overheated gas ejected through the explosion-proof valve will not cause damage to the first heat exchange plate. On the other hand, the overheated gas ejected through the explosion-proof valve can be discharged through the exhaust space, and the exhaust spaces of a battery row are sequentially connected along the first direction, so that the exhaust space basically forms a straight channel, and the straight line between two points is the shortest, so the exhaust path can be shortened and the discharge of overheated gas can be accelerated.

[0010] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0012] Figure 1 FIG. 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein.

[0013] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of a battery pack, a heat exchange structure and a bracket.

[0014] Figure 3 for Figure 2 A bottom-up schematic diagram of a battery pack and a heat exchange structure in FIG.

[0015] Figure 4 It is a schematic diagram of a three-dimensional structure of a battery pack, a heat exchange structure and a bracket in another exemplary embodiment of the battery device disclosed in the present invention.

[0016] Figure 5 for Figure 4 A top view schematic diagram of a battery pack and a heat exchange structure.

[0017] Description of reference numerals:

[0018] 100, battery pack; 10, battery array; 1, battery; 11, battery housing; 111, first wall; 112, second wall; 113, third wall; 114, explosion-proof valve; 12, first electrode; 13, second electrode; 14, battery pole;

[0019] 2. heat exchange structure; 21. first heat exchange plate; 211. first side; 2111. first part; 2112. second part; 212. first heat exchange channel; 22. second heat exchange plate; 221. second heat exchange channel; 23. third heat exchange plate; 231. third side; 2311. third part; 2312. fourth part;

[0020] 3. Exhaust space;

[0021] 4. Bracket; 41. First support plate; 42. Connecting plate;

[0022] 5. Thermal conductive structural adhesive layer;

[0023] 6. Battery box; 61. First side frame; 62. Second side frame; 63. Bottom plate;

[0024] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0026] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0027] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0028] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. "And / or" is just a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0029] The present disclosure provides a battery device according to an exemplary embodiment. Figure 1-Figure 4 As shown, the battery device may include a battery 1 and a heat exchange structure 2; at least two batteries 1 are arranged in sequence along a first direction X to form a battery column 10, the battery 1 may include a battery housing 11, the battery housing 11 has a first wall 111 and a second wall 112 connected to each other, and the first wall 111 and the second wall 112 are arranged to intersect, and the first wall 111 is provided with an explosion-proof valve 114; the heat exchange structure 2 may include a first heat exchange plate 21 and a second heat exchange plate 22 connected to each other, the first heat exchange plate 21 is in thermal contact with the first wall 111, and the second heat exchange plate 22 is in thermal contact with at least part of the second wall 112, the orthographic projection of the heat exchange structure 2 on the first reference plane does not overlap with the orthographic projection of the explosion-proof valve 114 on the first reference plane, and the space on the side of the first wall 111 away from the battery 1 where the first heat exchange plate 21 is not arranged is the exhaust space 3 of the battery 1, the exhaust spaces 3 of a battery column 10 are connected in sequence along the first direction X, and the first reference plane is parallel to the first wall 111.

[0030] In the battery device disclosed in the present invention, on one hand, the first heat exchange plate 21 can dissipate heat for the first wall 111, and the second heat exchange plate 22 can dissipate heat for the second wall 112, thereby increasing the heat dissipation area of ​​the battery 1, thereby improving the thermal conductivity of the battery 1, so as to meet the heat dissipation requirements of fast charging and achieve high-rate super-fast charging; in the event of overheating of a battery 1, the generated heat can be quickly transferred out, reducing the thermal impact on other batteries 1, and achieving thermal suppression of a single battery 1. On the other hand, the heat exchange structure 2 does not cover the explosion-proof valve 114, so in the event of overheating of the battery 1, it will not affect the explosion of the explosion-proof valve 114, and the overheated gas ejected through the explosion-proof valve 114 will not cause damage to the first heat exchange plate 21. On the other hand, the overheated gas ejected through the explosion-proof valve 114 can be discharged through the exhaust space 3, and the exhaust spaces 3 of a battery column 10 are sequentially connected along the first direction X, so that the exhaust space 3 basically forms a straight channel, and the straight line between two points is the shortest, so the exhaust path can be shortened and the discharge of the overheated gas can be accelerated.

[0031] In this example implementation, refer to Figure 1 As shown, the battery device may include a battery box 6, and the battery box 6 may be set to a rectangular parallelepiped structure. Specifically, the battery box 6 may include a bottom plate 63, a protective cover (not shown in the figure), two first side frames 61 and two second side frames 62, and the bottom plate 63 and the protective cover may be set to a rectangular shape. Two first side frames 61 and two second side frames 62 are arranged around the bottom plate 63, and the two first side frames 61 and the two second side frames 62 are connected end to end to form a rectangular frame, the first side frame 61 extends along the first direction X, and the second side frame 62 extends along the second direction Y. A protective cover is arranged on the other side of the two first side frames 61 and the two second side frames 62 opposite to the bottom plate 63, so that the protective cover is arranged opposite to the bottom plate 63, and the two first side frames 61 and the two second side frames 62 are connected between the protective cover and the bottom plate 63. The bottom plate 63, the protective cover, the two first side frames 61 and the two second side frames 62 surround and form a accommodating cavity of the battery box 6.

[0032] Of course, in other exemplary embodiments of the present disclosure, the bottom plate 63 and the protective cover can be set to be circular, elliptical, trapezoidal, etc., and the side frame can be set to be one or more, and surrounded to form a circular, elliptical, trapezoidal, etc., so that the battery box 6 is formed into a cylindrical, elliptical column, prism, etc. The battery box 6 body can also be other shapes, which are not described here one by one.

[0033] A plurality of batteries 1 are arranged in the battery box 6, and at least two batteries 1 are sequentially arranged in a first direction X to form a battery column 10. For example, two batteries 1 may be sequentially arranged in a first direction X to form a battery column 10, or three or more batteries 1 may be sequentially arranged in a first direction X to form a battery column 10. The plurality of batteries 1 are arranged to form a plurality of battery columns 10. Two adjacent battery columns 10 form a battery pack 100. The battery box 6 may be provided with a single battery column 10, a single battery pack 100, or two or more battery packs 100.

[0034] When two or more columns of battery columns 10 are provided, the batteries 1 in two adjacent columns of battery columns 10 are staggered. For example, the battery 1 in the first column is arranged opposite to the gap between two adjacent batteries 1 in the second column, rather than the battery 1 in the first column being arranged opposite to the battery 1 in the second column, so as to improve the energy density of the battery device.

[0035] In this example embodiment, the battery 1 may be a cylindrical battery. Figure 2 As shown, the battery housing 11 can be set as a cylinder, that is, the battery housing 11 can include a cover plate and a bottom wall arranged opposite to each other, the cover plate and the bottom wall are both arranged in a circular shape, and a side wall is connected between the cover plate and the bottom wall, and the side wall is arranged in a cylindrical shape. The side wall, the cover plate and the bottom wall surround and form a receiving cavity for the battery 1. Of course, the battery 1 can also be a quadrangular prism battery 1, a pentagonal prism battery 1, a hexagonal prism battery 1, and the like.

[0036] The battery housing 11 may be made of aluminum, steel or other metals and alloys. Of course, it may also be made of other materials, which will not be described here one by one.

[0037] In this example embodiment, an electrode assembly is arranged in the accommodating cavity of the battery housing 11, and the electrode assembly may include a battery cell body, a first pole ear and a second pole ear, and the polarity of the first pole ear is opposite to that of the second pole ear. The battery cell body is arranged as a cylinder, for example, the battery cell body can be arranged as a cylinder adapted to the battery housing 11. The battery cell body has a first end face and a second end face, and the first end face is arranged opposite to the second end face. The battery cell body may include a first pole sheet and a second pole sheet, and a separator arranged between the first pole sheet and the second pole sheet, and the battery cell body may be formed by winding the first pole sheet, the separator and the second pole sheet arranged in a stacked manner. Active material is coated on the first pole sheet and the second pole sheet.

[0038] The first pole ear is connected to the battery body, specifically, the first pole ear is connected to the first pole piece; the first pole ear is located at the first end surface of the battery body close to the cover plate. The second pole ear is connected to the battery body, specifically, the second pole ear is connected to the second pole piece; and the second pole ear can be located on the same side of the battery body as the first pole ear, that is, the second pole ear can be located at the first end surface of the battery body close to the cover plate, so that the first pole ear and the second pole ear are arranged on the side of the first end surface away from the battery body.

[0039] The first pole tab may be a portion of the multi-layer first pole sheet extending out of the battery body, and being bent to the side of the first end face of the battery body away from the battery body to form the first pole tab, so that the first pole tab may include a multi-layer first pole tab sheet. The second pole tab may be a portion of the multi-layer second pole sheet extending out of the battery body, and being bent to the side of the first end face of the battery body away from the battery body to form the second pole tab, so that the second pole tab may include a multi-layer second pole tab sheet.

[0040] It should be noted that the first pole tab and the second pole tab are conductive foil areas without active material coating, that is, no active material coating is coated on the first pole tab and the second pole tab, and the first pole tab and the second pole tab are current collecting layers for transmitting current.

[0041] In this example implementation, refer to Figure 2 As shown, the battery pole 14 is insulated and connected to the cover plate. Specifically, a through hole is provided on the cover plate, and the battery pole 14 passes through the through hole and is riveted to the cover plate. An insulating member is provided between the battery pole 14 and the cover plate to insulate the battery pole 14 from the cover plate.

[0042] Reference Figure 2 and Figure 3 As shown, the battery housing 11 has a first wall 111 and a second wall 112 connected to each other, and the first wall 111 and the second wall 112 are arranged to intersect, for example, the first wall 111 and the second wall 112 can be arranged vertically; the first wall 111 is provided with an explosion-proof valve 114. In this exemplary embodiment, the explosion-proof valve 114 is arranged on the bottom wall, so the bottom wall is the first wall 111, and the first wall 111 is arranged in a circular shape; the side wall is the second wall 112, and the second wall 112 is arranged as one, and the second wall 112 is cylindrical; the cover plate is the third wall 113, and the third wall 113 is arranged in a circular ring shape.

[0043] Of course, in some other example embodiments of the present disclosure, when battery 1 is a quadrangular prism battery 1, a pentagonal prism battery 1, a hexagonal prism battery 1, etc., a plurality of second walls 112 are provided, and second wall 112 is a rectangular flat plate. First wall 111 can be provided as a rectangular, pentagonal, hexagonal, etc. flat plate, and third wall 113 can be provided as a rectangular, pentagonal, hexagonal, etc. flat plate.

[0044] The following description will be made by taking the battery 1 as a cylindrical battery 1 and the second wall 112 as a cylindrical body as an example.

[0045] The explosion-proof valve 114 can be a weak structure arranged on the bottom wall. After the electrode assembly undergoes thermal runaway, high-temperature gas, sparks and high-temperature solid particles can break through the explosion-proof valve 114 on the bottom wall and spray out from the explosion-proof valve 114 to prevent the single battery 1 from exploding.

[0046] Specifically, the explosion-proof valve 114 can be a scratch or groove set on the first wall 111; the explosion-proof valve 114 with a scratch or groove structure can be set on the inner side of the first wall 111 close to the electrode assembly, or on the outer side of the first wall 111 away from the electrode assembly. The scratch can be formed by mechanical processing, and the groove can be formed by photolithography or chemical etching. It can also be a weak structure in which the thickness of the entire explosion-proof valve 114 is thinner than the thickness at other locations. In this example embodiment, the explosion-proof valve 114 is a circular scratch set on the first wall 111.

[0047] In this example embodiment, the heat exchange structure 2 may include a first heat exchange plate 21 and a second heat exchange plate 22 connected to each other, the first heat exchange plate 21 is in thermal contact with the first wall 111, and the second heat exchange plate 22 is in thermal contact with at least part of the second wall 112. In the case where the battery 1 is a cylindrical battery 1, the second heat exchange plate 22 is in thermal contact with a part of the second wall 112; in the case where the battery 1 is a quadrangular prism battery 1, the second heat exchange plate 22 may be in thermal contact with the entirety of the second wall 112.

[0048] Since the first wall 111 and the second wall 112 are arranged to intersect, the first heat exchange plate 21 and the second heat exchange plate 22 are also arranged to intersect. For example, the first heat exchange plate 21 and the second heat exchange plate 22 are arranged vertically. When a battery column 10 is arranged, the first heat exchange plate 21 and the second heat exchange plate 22 are connected to form an "L" shape. Figure 2 As shown, in the case where two columns of battery columns 10 are provided, the first heat exchange plate 21 and the second heat exchange plate 22 are connected to form an inverted "T" shape. The first heat exchange plate 21 can dissipate heat to the first wall 111, and the second heat exchange plate 22 can dissipate heat to the second wall 112, thereby increasing the heat dissipation area of ​​the battery 1, thereby improving the thermal conductivity of the battery 1 to meet the heat dissipation requirements of fast charging and achieve high-rate super-fast charging. In the event of overheating of a battery 1, the generated heat can be quickly transferred away to reduce the thermal impact on other batteries 1, thereby achieving thermal suppression of a single battery 1.

[0049] Reference Figure 3As shown, the orthographic projection of the heat exchange structure 2 on the first reference plane does not overlap with the orthographic projection of the explosion-proof valve 114 on the first reference plane, that is, the heat exchange structure 2 does not cover the explosion-proof valve 114. In the event of overheating of the battery 1, the explosion-proof valve 114 will not be affected, and the overheated gas ejected through the explosion-proof valve 114 will not cause damage to the first heat exchange plate 21.

[0050] It should be noted that, in the present disclosure, the first reference plane is parallel to the first wall 111 .

[0051] Moreover, refer to Figure 2 and Figure 3 As shown, the space on the side of the first wall 111 away from the battery 1 where the first heat exchange plate 21 is not provided is the exhaust space 3 of the battery 1. The overheated gas ejected through the explosion-proof valve 114 can be discharged through the exhaust space 3. The exhaust spaces 3 of a row of battery rows 10 are connected in sequence along the first direction X, so that the exhaust space 3 basically forms a straight channel, and the straight line between two points is the shortest. Therefore, the exhaust path can be shortened and the discharge of the overheated gas can be accelerated.

[0052] In this example implementation, refer to Figure 2 and Figure 3 As shown, the orthographic projection of the first heat exchange plate 21 on the first reference plane is the first projection, the orthographic projection of the second heat exchange plate 22 on the first reference plane is the second projection, and the orthographic projection of the explosion-proof valve 114 on the first reference plane is the third projection, and the first projection is located on the side of the third projection close to the second projection; that is, the first heat exchange plate 21 is arranged on the side of the explosion-proof valve 114 close to the second heat exchange plate 22, and the first heat exchange plate 21 is not arranged on the side of the explosion-proof valve 114 away from the second heat exchange plate 22, so that the space on the side of the first wall 111 away from the battery 1 where the first heat exchange plate 21 is not arranged forms an exhaust space 3, and the exhaust spaces 3 of a battery column 10 are naturally connected in sequence along the first direction X.

[0053] Such an arrangement not only allows the first heat exchange plate 21 to dissipate heat from the first wall 111 to increase the thermal conductivity of the battery 1 , but also increases the volume of the exhaust space 3 , which is beneficial to the heat dissipation and rapid discharge of the overheated gas.

[0054] Optionally, refer to Figure 3 As shown, the first side surface 211 of the first heat exchange plate 21 close to the explosion-proof valve 114 may include a first portion 2111 and a second portion 2112 connected to each other. The first portion 2111 and the second portion 2112 are both configured as curved surfaces, so that the edge line of the orthographic projection of the first heat exchange plate 21 on the first reference plane close to the explosion-proof valve 114 is configured as a curve.

[0055] The first portion 2111 is configured as a curved surface that matches the explosion-proof valve 114. For example, if the explosion-proof valve 114 is a circular notch provided on the first wall 111, the first portion 2111 can be configured as a circular arc surface; if the explosion-proof valve 114 is an elliptical notch provided on the first wall 111, the first portion 2111 can be configured as an elliptical arc surface; if the explosion-proof valve 114 is a parabolic notch provided on the first wall 111, the first portion 2111 can be configured as a parabolic arc surface.

[0056] The first portion 2111 is arranged opposite to the explosion-proof valve 114, and the first portion 2111 is recessed toward one side of the second heat exchange plate 22, so that the first heat exchange plate 21 provides sufficient avoidance for the explosion-proof valve 114, so that the first heat exchange plate 21 does not block the ejected superheated gas, thereby ensuring the rapid ejection of the superheated gas, and the ejected superheated gas does not cause damage to the first heat exchange plate 21.

[0057] The second portion 2112 may also be configured as an arc surface. The second portion 2112 protrudes toward the side away from the second heat exchange plate 22, and the second portion 2112 may protrude between two adjacent explosion-proof valves 114 of two adjacent batteries 1. The second portion 2112 may increase the area of ​​the first heat exchange plate 21, which is beneficial to the heat dissipation of the first wall 111; and may increase the strength of the first heat exchange plate 21, which may better support the battery array 10 and increase the stability of the battery device.

[0058] Of course, in some other exemplary embodiments of the present disclosure, the first side surface 211 of the first heat exchange plate 21 close to the explosion-proof valve 114 may also be set as a plane. The second portion 2112 may also be set as an elliptical arc surface, a parabolic arc surface or other arc surfaces; the second portion 2112 may also be set as a structure connected by a plane or a structure connected by a plane and an arc surface.

[0059] In this example embodiment, the minimum distance between the orthographic projection of the first portion 2111 on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve 114 on the first reference plane is greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, the minimum distance between the orthographic projection of the first portion 2111 on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve 114 on the first reference plane can be 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 2 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.3 mm, 4.5 mm, 4.8 mm, etc.

[0060] If the minimum distance between the orthographic projection of the first portion 2111 on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve 114 on the first reference plane is too small, the first heat exchange plate 21 is too close to the explosion-proof valve 114, and the first heat exchange plate 21 will have a certain blocking effect on the ejected superheated gas, which is not conducive to the rapid ejection of the superheated gas, and the ejected superheated gas will cause damage to the first heat exchange plate 21.

[0061] If the minimum distance between the orthographic projection of the first portion 2111 on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve 114 on the first reference plane is too large, the area of ​​the first heat exchange plate 21 is reduced, which is not conducive to heat dissipation of the first wall 111.

[0062] The above numerical range not only ensures that the first heat exchange plate 21 does not block the ejected superheated gas to ensure rapid ejection of the superheated gas, but also prevents the ejected superheated gas from causing damage to the first heat exchange plate 21; furthermore, it ensures the area of ​​the first heat exchange plate 21, which is beneficial to the heat dissipation of the first wall 111.

[0063] It should be noted that, since the first portion 2111 is set as a curved surface adapted to the explosion-proof valve 114, the first portion 2111 is substantially parallel to the edge line of the explosion-proof valve 114 close to the first portion 2111. The minimum distance between the orthographic projection of the first portion 2111 on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve 114 on the first reference plane refers to the distance between the orthographic projection of the first portion 2111 on the first reference plane and the section of the orthographic projection of the explosion-proof valve 114 on the first reference plane close to the first portion 2111.

[0064] In this example implementation, refer to Figure 1 As shown, two adjacent columns of battery columns 10 form a battery group 100. A second heat exchange plate 22 is arranged between two adjacent columns of battery columns 10 belonging to the same group. Heat is exchanged between the second walls 112 of the two adjacent columns of battery columns 10 belonging to the same group through the second heat exchange plate 22, thereby increasing the utilization rate of the internal space of the battery box 6. The first heat exchange plate 21 protrudes from the second heat exchange plate 22 on both sides of the second direction Y. The first heat exchange plate 21 and the second heat exchange plate 22 are connected to form an inverted "T" shape. The first heat exchange plate 21 is in thermal contact with the first walls 111 of the two adjacent columns of battery 1. Heat is exchanged between the first walls 111 of the two adjacent columns of battery columns 10 belonging to the same group through the first heat exchange plate 21, thereby increasing the utilization rate of the internal space of the battery box 6. No second heat exchange plate 22 is arranged between two adjacent columns of battery columns 10 that do not belong to the same group.

[0065] Reference Figure 1 and Figure 2As shown, the battery device may further include a bracket 4, and the bracket 4 may include a connecting plate 42 and two first supporting plates 41. The connecting plate 42 is connected between the two first supporting plates 41 and is located on the side of the first supporting plate 41 away from the battery 1, so that the bracket 4 is arranged in a horizontal "[" shape. The first supporting plate 41 abuts against the first wall 111, and one first supporting plate 41 and the first heat exchange plate 21 jointly support a column of battery columns 10, and two first supporting plates 41 and the first heat exchange plate 21 jointly support two columns of battery columns 10 to ensure the stability of the support for the battery 1.

[0066] In addition, in some other exemplary embodiments of the present disclosure, refer to Figure 4 As shown, the bracket 4 may include two first support plates 41, but not the connecting plate 42. The first support plates 41 may be fixedly connected to the bottom plate 63, and the two first support plates 41 and the first heat exchange plate 21 may support two battery columns 10 together to ensure the stability of the support for the battery 1.

[0067] Of course, in the case of providing a row of battery rows 10 , the bracket 4 may include a first support plate 41 , the first support plate 41 abuts against the first wall 111 , and the first support plate 41 and the first heat exchange plate 21 jointly support the row of battery rows 10 .

[0068] In this example implementation, refer to Figure 4 As shown, the heat exchange structure 2 may further include a third heat exchange plate 23 , which is connected to a side of the second heat exchange plate 22 away from the first heat exchange plate 21 , and is in thermal contact with the third wall 113 .

[0069] Since the third wall 113 is arranged opposite to the first wall 111, the third wall 113 and the second wall 112 are also arranged to intersect, so the third heat exchange plate 23 and the second heat exchange plate 22 are also arranged to intersect, for example, the third heat exchange plate 23 and the second heat exchange plate 22 are arranged vertically; in the case of a battery column 10, the first heat exchange plate 21, the second heat exchange plate 22 and the third heat exchange plate 23 are connected to form a "[" shape. In the case of two battery columns 10, the first heat exchange plate 21, the second heat exchange plate 22 and the third heat exchange plate 23 are connected to form an "I" shape. The third heat exchange plate 23 can dissipate heat from the third wall 113, further increasing the heat dissipation area of ​​the battery 1, thereby improving the thermal conductivity of the battery 1, so as to meet the heat dissipation requirements of fast charging and achieve high-rate super fast charging. In the case of overheating of a battery 1, the generated heat can be transferred out more quickly, reducing the thermal impact on other batteries 1, and achieving thermal suppression of a single battery 1.

[0070] Moreover, one or two battery rows 10 can be limited and fixed by the first heat exchange plate 21, the second heat exchange plate 22 and the third heat exchange plate 23, so that the heat exchange structure 2 not only plays a role in heat exchange for the battery 1, but also plays a role in fixing the battery 1, and can replace the potting glue; that is, in this case, the battery 1 can be fixed without the potting glue.

[0071] Since the third heat exchange plate 23 and the battery pole 14 are arranged on the same side of the battery 1 , and the battery pole 14 needs to be conductive, the third heat exchange plate 23 needs to avoid the battery pole 14 .

[0072] Reference Figure 5 As shown, the third side surface 231 of the third heat exchange plate 23 close to the battery pole 14 may include a third portion 2311 and a fourth portion 2312 connected to each other. The third portion 2311 and the fourth portion 2312 are both configured as curved surfaces, so that the edge line of the orthographic projection of the third heat exchange plate 23 on the first reference plane close to the battery pole 14 is configured as a curve.

[0073] The third part 2311 is configured as a curved surface that matches the battery pole 14. For example, if the battery pole 14 is configured as a cylinder, the third part 2311 can be configured as a circular arc surface; if the battery pole 14 is configured as an elliptical cylinder, the third part 2311 can be configured as an elliptical arc surface; if the battery pole 14 is configured as a prism, the third part 2311 can include multiple planes.

[0074] The third portion 2311 is arranged opposite to the battery pole 14 , and the third portion 2311 is recessed toward one side of the second heat exchange plate 22 , so that the third heat exchange plate 23 provides sufficient avoidance for the battery pole 14 , thereby avoiding electrical connection between the third heat exchange plate 23 and the battery pole 14 .

[0075] The fourth portion 2312 may also be configured as an arc surface. The fourth portion 2312 protrudes toward a side away from the second heat exchange plate 22, and the fourth portion 2312 may protrude between two adjacent battery poles 14 of two adjacent batteries 1. The fourth portion 2312 may increase the area of ​​the third heat exchange plate 23, which is beneficial to heat dissipation of the third wall 113.

[0076] Of course, in some other exemplary embodiments of the present disclosure, the third side surface 231 of the third heat exchange plate 23 close to the battery pole 14 may also be set as a plane. The fourth portion 2312 may also be set as an elliptical arc surface, a parabolic arc surface or other arc surfaces; the fourth portion 2312 may also be set as a structure connected by a plane or a structure connected by a plane and an arc surface.

[0077] Reference Figure 4As shown, a first heat exchange channel 212 extending along the first direction X is disposed in the first heat exchange plate 21. A second heat exchange channel 221 extending along the first direction X is disposed in the second heat exchange plate 22.

[0078] In this example implementation, refer to Figure 2 As shown, the battery device may further include a heat-conducting structural adhesive layer 5, which is bonded between the battery housing 11 and the heat exchange structure 2, that is, the battery housing 11 and the heat exchange structure 2 are bonded together by the heat-conducting structural adhesive. This ensures that the battery housing 11 and the heat exchange structure 2 are in close contact, thereby ensuring the heat transfer effect between the battery housing 11 and the heat exchange structure 2; and also ensures the connection strength between the battery housing 11 and the heat exchange structure 2, thereby improving the overall strength of the battery device.

[0079] The "parallel" and "perpendicular" mentioned in this application can not only be completely parallel or perpendicular, but also can have a certain error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, the two are considered to be parallel to each other; if the angle between the two is greater than or equal to 85° and less than or equal to 95°, the two are considered to be perpendicular to each other.

[0080] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A battery device, characterized in that: include: At least two batteries are arranged in sequence along a first direction to form a battery column, the battery comprising a battery housing, the battery housing having a first wall and a second wall connected to each other, the first wall intersecting the second wall, and the first wall being provided with an explosion-proof valve; A heat exchange structure comprises a first heat exchange plate and a second heat exchange plate connected to each other, the first heat exchange plate is in thermal contact with the first wall, the second heat exchange plate is in thermal contact with at least part of the second wall, the orthographic projection of the heat exchange structure on a first reference plane does not overlap with the orthographic projection of the explosion-proof valve on the first reference plane, a space on a side of the first wall away from the battery where the first heat exchange plate is not arranged is an exhaust space of the battery, the exhaust spaces of a row of the batteries are connected in sequence along the first direction, and the first reference plane is parallel to the first wall.

2. The battery device according to claim 1, characterized in that: The orthographic projection of the first heat exchange plate on the first reference plane is the first projection, the orthographic projection of the second heat exchange plate on the first reference plane is the second projection, the orthographic projection of the explosion-proof valve on the first reference plane is the third projection, and the first projection is located on a side of the third projection close to the second projection.

3. The battery device according to claim 1, characterized in that: The first side surface of the first heat exchange plate close to the explosion-proof valve includes a first part and a second part connected to each other, the first part and the second part are arranged as curved surfaces, the first part is arranged opposite to the explosion-proof valve, the first part is recessed toward a side of the second heat exchange plate, and the second part protrudes toward a side away from the second heat exchange plate.

4. The battery device according to claim 3, characterized in that: The first part is set to a curved surface adapted to the explosion-proof valve, and the minimum distance between the orthographic projection of the first part on the first reference plane and the edge line of the orthographic projection of the explosion-proof valve on the first reference plane is greater than or equal to 0.5 mm and less than or equal to 5 mm.

5. The battery device according to claim 1, characterized in that: The battery device further comprises: The bracket includes a first support plate, the first support plate is in contact with the first wall, and the first support plate and the first heat exchange plate jointly support a row of the batteries.

6. The battery device according to claim 5, characterized in that: Two adjacent columns of the battery columns form a battery group, the second heat exchange plate is arranged between two adjacent columns of the battery columns belonging to the same group, and the first heat exchange plate is in thermal contact with the first wall bodies of the two adjacent columns of the battery columns.

7. The battery device according to claim 6, characterized in that: The first support plates are provided in two numbers, and the bracket further comprises: The connecting plate is connected between the two first supporting plates and is located on a side of the first supporting plate away from the battery. The bracket and the first heat exchange plate jointly support the group of battery packs.

8. The battery device according to any one of claims 1 to 7, characterized in that: The battery housing has a third wall, the third wall is arranged opposite to the first wall, and the heat exchange structure further includes: The third heat exchange plate is connected to a side of the second heat exchange plate facing away from the first heat exchange plate, and the third heat exchange plate is in heat-conducting contact with the third wall.

9. The battery device according to claim 8, characterized in that: The first electrode and the second electrode of the battery are arranged on the same side of the battery, and the third wall is at least a part of the first electrode.

10. The battery device according to claim 9, characterized in that: The battery is a cylindrical battery, the battery housing is the first electrode, and the battery further comprises: A battery pole, which passes through the third wall and is insulated and connected to the battery shell, is the second electrode; the third side of the third heat exchange plate close to the battery pole includes a third part and a fourth part that are connected to each other, and the third part and the fourth part are arranged as curved surfaces. The third part is arranged opposite to the battery pole, the third part is recessed toward the side of the second heat exchange plate, and the fourth part protrudes toward the side away from the second heat exchange plate.

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