CN220652124U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device, which comprises a battery and a heat exchange plate, wherein the heat exchange plate is arranged between adjacent batteries, the heat exchange plate comprises two plate bodies which are oppositely arranged along a first direction, the first direction is perpendicular to the arrangement surface of the battery, a flow passage is arranged in each plate body, each plate body is provided with a first surface facing the other plate body, two end regions of the first surface along a second direction are respectively connected regions, the second direction is the height direction of the battery, the two plate bodies are welded and fixed through the connected regions, and a buffer cavity is formed between the rest regions of the first surfaces of the two plate bodies; wherein, the connection region of at least one plate body has seted up logical groove, leads to the groove and forms the cavity that is used for holding the welding wire jointly with another plate body. Through the structural design, the welding difficulty of the two plate bodies of the heat exchange plate can be reduced, the welding effect is improved, and the structural stability of the battery device is ensured.

Description

Battery device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery device.

Background

In the design scheme of the existing battery device, a heat exchange plate is arranged between large faces of adjacent batteries and comprises two plate bodies arranged along the arrangement direction of the batteries, partial areas of the two plate bodies are welded and connected, and a buffer cavity is formed between the rest parts of the two plate bodies. However, because the length of the heat exchange plate is larger, the welding operation space of the two plate bodies is insufficient, the welding difficulty is larger, the welding effect is poor, and the structural stability of the battery device is affected.

Disclosure of Invention

It is a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a battery device with improved structural stability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a battery device, comprising a battery and a heat exchange plate disposed between adjacent batteries, the heat exchange plate comprising two plate bodies arranged oppositely in a first direction, the first direction being perpendicular to an arrangement surface of the batteries, the plate bodies having flow channels inside, each of the plate bodies having a first surface facing the other plate body, two end regions of the first surface in a second direction being connection regions respectively, the second direction being a height direction of the battery, the two plate bodies being welded and fixed via the connection regions, a buffer chamber being formed in common between the remaining regions of the first surfaces of the two plate bodies; the connecting area of at least one plate body is provided with a through groove, and the through groove and the other plate body jointly form a chamber for accommodating welding wires.

As can be seen from the above technical solutions, the battery device provided by the present utility model has the following advantages and positive effects:

the heat exchange plate of the battery device comprises two plate bodies which are oppositely arranged along a first direction, the first direction is perpendicular to the arrangement surface of the battery, flow channels are formed in the plate bodies, each plate body is provided with a first surface facing the other plate body, two end regions of the first surface along a second direction are respectively connected regions, the second direction is the height direction of the battery, the two plate bodies are welded and fixed through the connected regions, and a buffer cavity is formed between the rest regions of the first surfaces of the two plate bodies. The connecting area of at least one plate body is provided with a through groove, and the through groove and the other plate body jointly form a chamber for accommodating welding wires. Through the structural design, the cavity for containing welding wires can be formed by the through grooves formed in the connecting area, so that the two plate bodies of the heat exchange plate are convenient to weld and connect through the connecting area, welding difficulty is reduced, welding effect is improved, and structural stability of the battery device is guaranteed.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic perspective view of a part of the structure of a battery device according to an exemplary embodiment;

fig. 2 is a schematic perspective view of the heat exchange plate shown in fig. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 and 5 are respectively partially exploded views of the heat exchanger plate shown in fig. 2 in different exploded states.

The reference numerals are explained as follows:

100. a heat exchange plate;

110. a plate body;

1101. a first surface;

111. a flow passage;

112. a separation rib;

120. a boss;

1201. welding the end face;

121. a through groove;

122. a chamber;

130. a buffer chamber;

200. a battery;

201. an alignment surface;

300. a battery case;

D1. thickness;

D2. thickness;

D3. a distance;

x, a first direction;

y, the second direction;

and Z, third direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a part of the structure of a battery device according to the present utility model is representatively illustrated. In this exemplary embodiment, a battery device according to the present utility model will be described by taking an in-vehicle battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes are still within the principles of the battery devices presented herein.

As shown in fig. 1, in an embodiment of the present utility model, the battery device includes a battery case 300, a battery 200, and a heat exchange plate 100, wherein the battery 200 is accommodated in the battery case 300, and the heat exchange plate 100 is disposed between adjacent batteries 200. Referring to fig. 2 to 5 in combination, a schematic perspective view of the heat exchange plate 100 shown in fig. 1 is representatively illustrated in fig. 2; a cross-sectional view taken along line A-A in fig. 2 is representatively illustrated in fig. 3 with a partial area enlarged; fig. 4 is a partially exploded view of the heat exchanger plate shown in fig. 2 in an exploded state, in which two plate bodies 110 are separated in a first direction X; fig. 5 is a partially exploded view of the heat exchanger plate shown in fig. 2 in another exploded state, in which two plate bodies 110 are specifically offset in a third direction Z. The structure, connection manner and functional relationship of the main components of the battery device according to the present utility model will be described in detail below with reference to the above-mentioned drawings.

As shown in fig. 2 to 5, in an embodiment of the present utility model, the heat exchange plate 100 includes two plate bodies 110 oppositely arranged along a first direction X, wherein the first direction X is perpendicular to the arrangement surface 201 of the cells 200, and the "arrangement surface 201" refers to the opposite surface of the adjacent cells 200, and the first direction X perpendicular to the arrangement surface 201 is also equivalent to the first direction X parallel to the arrangement direction of the adjacent cells 200. The inside of the plate bodies 110 has flow channels 111, and each plate body 110 has a first surface 1101 facing the other plate body 110, and both end regions of the first surface 1101 of each plate body 110 in a second direction Y, which is a height direction of the battery 200, i.e., the second direction Y is perpendicular to the first direction X and parallel to the arrangement surface 201 of the battery 200, are connection regions, respectively. Wherein the two plates 110 are welded and fixed via the connection area, and the buffer cavity 130 is formed between the rest areas of the first surface 1101 of the two plates 110. On this basis, a through groove 121 is formed in the connection region of at least one plate body 110, and the through groove 121 and the other plate body 110 (for example, the connection region of the plate body 110 or the through groove 121 formed in the other plate body) together form a chamber 122, and the chamber 122 is used for accommodating welding wires. Through the structural design, the cavity 122 for accommodating welding wires can be formed by using the through groove 121 formed in the connecting area, so that the two plate bodies 110 of the heat exchange plate 100 are convenient to weld and connect through the connecting area, welding difficulty is reduced, welding effect is improved, and structural stability of the battery device is ensured.

Specifically, the welding between the connection areas of the two plate bodies 110 of the heat exchange plate 100 (for example, the welding end surfaces 1201 of the bosses 120 described below) may specifically employ a brazing process. Accordingly, prior to welding, the welding wire may be threaded from one end of the chamber 122 to the other end such that the welding wire fills the chamber 122, and the heat exchanger plate 100 is placed at a high temperature to melt the welding wire, which melts to form the solder that connects the two plates 110. Accordingly, the present utility model can form the chamber 122 accommodating the welding wire by using the through groove 121, and can facilitate the welding operation of the two plate bodies 110 of the heat exchange plate 100.

As shown in fig. 3 to 5, in an embodiment of the present utility model, the connection region of at least one plate body 110 may be provided with a boss 120, the boss 120 has a welding end face 1201 facing the other plate body 110, the boss 120 is welded to the other plate body 110 via the welding end face 1201, and the welding end face 1201 is provided with the through groove 121. In some embodiments, the plate 110 may also have other structures, for example, the plate 110 may have a curved structure, such that the connection areas of the two plates 110 are relatively close to each other, and the remaining areas of the two plates 110 have gaps to form the buffer cavity 130, which is not limited in this embodiment.

As shown in fig. 3 to 5, based on the structural design that the connection region of the plate bodies 110 is provided with the boss 120, in an embodiment of the present utility model, the connection region of the first surfaces 1101 of the two plate bodies 110 may be provided with the boss 120, and then the two plate bodies 110 are welded and fixed via the welding end surfaces 1201 of the respective bosses 120. On this basis, the positions of the through grooves 121 of the two welded and fixed bosses 120 correspond, and each cavity 122 is formed together by the corresponding two through grooves 121. In some embodiments, when the boss 120 is disposed at the connection region of the two plate bodies 110, only the welding end face 1201 of one boss 120 may be provided with the through groove 121 for the two welded and fixed bosses 120, and then the cavity 122 is formed together with the welding end face 1201 of the other boss 120 through the through groove 121. Furthermore, for at least one end of the two plate bodies 110 along the second direction, only one of the connection areas of the two plate bodies 110 may be provided with the boss 120, and then the one plate body 110 is welded and fixed via the connection area between the boss 120 and the first surface 1101 of the other plate body 110, and the through groove 121 may be formed only on the welding end face 1201 of the boss 120, or may be formed in the welding area between the boss 120 and the other plate body 110, or may be formed in the welding area of the other plate body 110 without the boss 120, which is not limited in this embodiment.

As shown in fig. 3 to 5, in an embodiment of the present utility model, the through groove 121 may extend along a third direction Z perpendicular to the first direction X and perpendicular to the second direction Y, that is, the third direction Z is a length direction of the heat exchange plate 100 and penetrates the boss 120. Through the structural design, the welding wire can be further arranged in the cavity 122 conveniently, so that the welding operation of the two plate bodies 110 is more convenient.

As shown in fig. 3 to 5, in an embodiment of the present utility model, for two bosses 120 welded to each other, the two bosses 120 may be provided with at least two through grooves 121, respectively, and the at least two through grooves 121 of each boss 120 are spaced apart in the second direction Y, thereby forming at least two chambers 122 arranged in the second direction Y between the two bosses 120. Through the structural design, the welding machine can adopt at least two groups of welding wires to participate in welding on the two corresponding bosses 120, so that the welding strength of the two plate bodies 110 is further improved, and the structural stability is further optimized.

As shown in fig. 3, in an embodiment of the present utility model, a distance D3 between an edge of the through groove 121 and an edge of the adjacent boss 120 in the second direction Y may be 1mm to 10mm, for example, 1mm, 2mm, 5mm, 10mm, etc. Through the structural design, the through groove 121 can be prevented from being too close to the edge of the boss 120, so that solder is prevented from flowing from the edge of the boss 120 to other spaces such as a buffer cavity, the buffer effect of the heat exchange plate is ensured, and the waste of the solder is avoided. Meanwhile, the utility model can avoid the through groove 121 from being far away from the edge of the boss 120, thereby ensuring that the solder can sufficiently spread between the welding end surfaces 1201 of two adjacent bosses 120, and accordingly ensuring the welding quality.

In an embodiment of the present utility model, the surface area of the arrangement surface 201 of the cells 200 may be larger than the surface area of any other surface of the cells 200, in other words, the arrangement surface 201 of the cells 200 may be the "large surface" thereof, that is, the heat exchange plate 100 is disposed between the "large surfaces" of the adjacent cells 200. For example, the battery device according to the present utility model may comprise at least one battery string comprising a plurality of batteries 200 arranged in the first direction X, wherein a heat exchanger plate 100 is arranged between at least two adjacent batteries 200. Through the above structural design, the heat generated by the battery 200 on the "large surface" is relatively high, and the thermal expansion deformation amplitude of the "large surface" is relatively large, so that the heat performance of the battery device can be further improved by using the heat exchange plate 100, and the buffer effect can be further improved by using the buffer cavity 130 of the heat exchange plate 100. In some embodiments, the alignment surface 201 of the battery 200 may be a surface other than the "large surface" thereof. For example, the battery device may include at least two battery columns, each battery column having its respective battery 200 arranged along a "large surface", and the heat exchange plate 100 may be disposed between the adjacent batteries 200 belonging to different battery columns.

As shown in fig. 3 to 4, in an embodiment of the present utility model, the cross section of the through groove 121 may be semicircular, and accordingly, the cross section of the chamber 122 may be circular. In some embodiments, the cross section of the through groove 121 may be other shapes, such as but not limited to semi-elliptical or rectangular, and the cross section of the chamber 122 may be elliptical or rectangular, and the utility model is not limited thereto.

As shown in fig. 3, in an embodiment of the present utility model, a plane parallel to the second direction Y and perpendicular to the second surface is defined as a reference plane, on which a ratio of a sum of areas of orthographic projections of all four bosses 120 of the heat exchange plate 100 to an area of orthographic projections of the buffer chamber 130 may be 0.1 to 2, for example, 0.1, 0.15, 1.05, 1.2, 1.5, 2, etc. Through the structural design, the utility model can avoid the impact of the buffer energy absorption effect of the heat exchange plate 100 caused by the too small area of the buffer cavity 130 due to the too large boss 120, and can avoid the difficulty in meeting the requirement of welding strength due to the too small boss 120. In some embodiments, the ratio of the sum of the areas of the orthographic projections of all four bosses 120 of the heat exchange plate 100 to the area of the orthographic projection of the buffer chamber 130 may be less than 0.1, or may be greater than 2, such as 0.99, 2.01, etc., but is not limited to this embodiment.

Based on the structural design that the ratio of the sum of the areas of the orthographic projections of all four bosses 120 of the heat exchange plate 100 to the area of the orthographic projection of the buffer chamber 130 is 0.1 to 2, in an embodiment of the present utility model, the ratio of the sum of the areas of the orthographic projections of all four bosses 120 of the heat exchange plate 100 to the area of the orthographic projection of the buffer chamber 130 may be further 0.16 to 1, for example, 0.16, 0.2, 0.5, 0.8, 1, etc. on the above reference plane.

As shown in fig. 3, in an embodiment of the present utility model, a ratio of the thickness D2 of the boss 120 to the thickness D1 of the plate body 110 along the first direction X may be 0.05 to 1.5, for example, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1, 1.5, etc. Through the above structural design, the utility model can avoid the influence on the buffering function caused by too small thickness D2 of the boss 120 and too small thickness of the buffer cavity 130, and can avoid the waste of space in the first direction X caused by too large thickness D2 of the boss 120. In some embodiments, the ratio of the thickness D2 of the boss 120 to the thickness D1 of the plate 110 may be less than 0.05, or may be greater than 1.5, such as 0.04, 1.51, etc., but is not limited to this embodiment.

As shown in fig. 3, in an embodiment of the present utility model, the boss 120 and the plate 110 provided therewith may be an integral structure. Through the structural design, the heat exchange plate 100 can further enhance the structural strength, and is beneficial to reducing the number of parts and simplifying the assembly complexity.

As shown in fig. 3, in an embodiment of the present utility model, the plate body 110 has an inner cavity in which a plurality of separation ribs 112 are disposed at intervals along the second direction Y, and the separation ribs 112 separate the inner cavity of the plate body 110 into a plurality of flow channels 111 aligned along the second direction Y. On this basis, each boss 120 may correspond to at least one of the separation ribs 112. Through the above structural design, since the two bodies of the heat exchange plate 100 are connected together at the boss 120, that is, when the expansion deformation of the battery 200 generates the extrusion force on the heat exchange plate 100 along the first direction X, most of the stress is transmitted through the mutually connected bosses 120, in this way, the structural strength of the plate body 110 in the region can be reinforced by the separation ribs 112 corresponding to the bosses 120, and the problem of collapse generated in the region when the bodies are compressed can be relieved.

In an embodiment of the present utility model, a buffer layer may be disposed in the buffer chamber 130. Through the structural design, the utility model can further improve the buffering energy absorbing capacity and the shock resistance capacity of the heat exchange plate 100.

It should be noted herein that the battery devices shown in the drawings and described in this specification are only a few examples of the wide variety of battery devices that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any of the details of the battery device or any of the components of the battery device shown in the drawings or described in the present specification.

In summary, the heat exchange plate 100 of the battery device according to the present utility model includes two plate bodies 110 oppositely arranged along a first direction X, the first direction X is perpendicular to the arrangement surface 201 of the battery 200, the plate bodies 110 are internally provided with the flow channels 111, each plate body 110 has a first surface 1101 facing the other plate body 110, two end regions of the first surface 1101 along a second direction Y are respectively connection regions, the second direction Y is a height direction of the battery 200, the two plate bodies 110 are welded and fixed via the connection regions, and the buffer cavity 130 is jointly formed between the rest regions of the first surface 1101 of the two plate bodies 110. The connecting area of at least one plate body 110 is provided with a through groove 121, and the through groove 121 and the other plate body 110 jointly form a chamber 122 for accommodating welding wires. Through the structural design, the cavity 122 for accommodating welding wires can be formed by using the through groove 121 formed in the connecting area, so that the two plate bodies 110 of the heat exchange plate 100 are convenient to weld and connect through the connecting area, welding difficulty is reduced, welding effect is improved, and structural stability of the battery device is ensured.

Exemplary embodiments of the battery device proposed by the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. The battery device is characterized by comprising a battery and a heat exchange plate, wherein the heat exchange plate is arranged between adjacent batteries, the heat exchange plate comprises two plate bodies which are oppositely arranged along a first direction, the first direction is perpendicular to the arrangement surface of the batteries, flow channels are formed in the plate bodies, each plate body is provided with a first surface facing the other plate body, two end regions of the first surface along a second direction are respectively connected regions, the second direction is the height direction of the battery, the two plate bodies are welded and fixed through the connected regions, and a buffer cavity is formed between the rest regions of the first surfaces of the two plate bodies; the connecting area of at least one plate body is provided with a through groove, and the through groove and the other plate body jointly form a chamber for accommodating welding wires.

2. The battery device according to claim 1, wherein the connection region of at least one of the plate bodies is provided with a boss having a welding end face facing the other plate body, the boss being welded to the other plate body via the welding end face, the welding end face being provided with the through groove.

3. The battery device according to claim 2, wherein the connection areas of the first surfaces of the two plate bodies are respectively provided with the bosses, the two plate bodies are welded and fixed via the welding end faces of the respective bosses, the positions of the through grooves of the welded and fixed two bosses correspond, and each chamber is formed together via the corresponding two through grooves.

4. A battery device according to claim 3, wherein:

the through groove extends along a third direction and penetrates through the boss, and the third direction is perpendicular to the first direction and perpendicular to the second direction; and/or

For two bosses which are connected with each other in a welded mode, at least two through grooves are formed in the two bosses respectively, the at least two through grooves of each boss are arranged at intervals along the second direction, and at least two cavities arranged along the second direction are formed between the two bosses.

5. The battery device of claim 2, wherein a distance between an edge of the through groove and an edge of the adjacent boss is 1mm to 10mm in the second direction.

6. The battery device according to claim 2, wherein a plane parallel to the second direction and perpendicular to the first surface is defined as a reference plane on which a ratio of a sum of areas of orthographic projections of all the bosses to an area of orthographic projections of the buffer chamber is 0.1 to 2.

7. The battery device according to claim 6, wherein a ratio of a sum of areas of orthographic projections of all the bosses to an area of orthographic projections of the buffer chamber on the reference surface is 0.16 to 1.

8. The battery device according to claim 2, wherein a ratio of a thickness of the boss to a thickness of the plate body is 0.05 to 1.5 in the first direction.

9. The battery device according to claim 2, wherein the plate body has an inner cavity in which a plurality of partition ribs arranged at intervals in the second direction are provided, the plurality of partition ribs partitioning the inner cavity into a plurality of the flow passages arranged in the second direction; wherein each of the bosses corresponds to at least one of the separation ribs.

10. The battery device of claim 1, wherein the surface area of the alignment surface is greater than the surface area of any other surface of the battery.