CN220368043U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery device, which comprises a bottom guard plate and a plurality of groups of battery packs, wherein one group of battery packs comprises at least two single batteries, the at least two single batteries are sequentially arranged along a first direction, the plurality of groups of battery packs are sequentially arranged along a second direction, and the first direction is intersected with the second direction; the bottom guard board is arranged on one side of the battery pack to support the battery pack, at least two protruding parts protruding towards one side deviating from the battery pack are arranged on the bottom guard board, two adjacent protruding parts are arranged at intervals, a groove is formed between the two adjacent protruding parts, orthographic projection of one protruding part on a first reference surface at least covers orthographic projection of the outermost battery pack on the first reference surface, and the first reference surface is parallel to one surface of the bottom guard board, which is close to the battery pack. The battery device has stronger impact resistance.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

At present, the downside of group battery in battery device is provided with end backplate, and end backplate can play the effect to the support and the protection of group battery, but, end backplate's protection against shock effect is not good, leads to battery device to receive the impact after, and the group battery is damaged easily.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcoming the defect of poor impact protection effect in the related art, and providing a battery device with good impact protection effect.

According to one aspect of the present disclosure, there is provided a battery device including:

the battery pack comprises at least two single batteries, wherein the at least two single batteries are sequentially arranged along a first direction, the plurality of battery packs are sequentially arranged along a second direction, and the first direction is intersected with the second direction;

the battery pack comprises a bottom guard plate, at least two protruding parts protruding towards one side deviating from the battery pack are arranged on one side of the battery pack to support the battery pack, two adjacent protruding parts are arranged at intervals, a groove is formed between the two adjacent protruding parts, orthographic projection of one protruding part on a first reference surface at least covers orthographic projection of the outermost battery pack on the first reference surface, and the first reference surface is parallel to one surface of the bottom guard plate, which is close to the battery pack.

According to the battery device, on one hand, the orthographic projection of the protruding part on the first reference surface at least covers the orthographic projection of the outermost battery pack on the first reference surface, so that the protruding part can protect the outermost battery pack, impact force is prevented from being transmitted to other battery packs on the inner side through the outermost battery pack, and the effect of protecting a plurality of battery packs is achieved. On the other hand, other battery packs in the battery device can be protected through a group of battery packs, even if impact force is transmitted to at least one group of battery packs at the outermost side through the protruding part, at least one group of battery packs at the outermost side can absorb part of even all impact force, the impact force is prevented from being transmitted to the battery packs in the battery device, the whole battery packs in the battery device are prevented from being damaged due to the impact force, and the safety performance of the battery device is improved. In yet another aspect, the strength of the bottom shield may be increased by providing grooves to increase the impact resistance of the bottom shield.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of an exemplary embodiment of a battery device of the present disclosure.

Fig. 2 is a schematic bottom view of the battery device of fig. 1.

Fig. 3 is a schematic structural view of an example embodiment of a midsole plate in a battery device of the present disclosure.

Fig. 4 is a schematic structural view of another example embodiment of a midsole plate in a battery device of the present disclosure.

Reference numerals illustrate:

1. a battery pack; 11. a single battery;

2. a battery box; 21. a first side rail; 22. a second side rail;

23. a bottom guard board; 231. a protruding portion; 232. a groove; 233. a frame portion; 2331. an outer peripheral frame portion; 2332. a connecting plate; 234. a through hole; 235. a body portion; 236. a bolt;

24. a protective cover;

3. a heat exchange plate; 41. a first gap; 42. a second gap;

x, a first direction; y, second direction; z, height direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with 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.

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 "comprising" 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.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The exemplary embodiment of the present disclosure provides a battery device, and referring to fig. 1 to 3, the battery pack 1 in fig. 2 is indicated by a dotted line because it is shielded by the bottom cover plate 23; also, for simplicity and clarity of the drawing, only the unit cells 11 included in the one-pack battery 1 are shown. The battery device may include a battery pack 1 and a bottom cover plate 23; the battery pack 1 may include at least two unit cells 11, the at least two unit cells 11 being sequentially arranged in the first direction X, the plurality of battery packs 1 being sequentially arranged in the second direction Y, the first direction X intersecting the second direction Y; the bottom guard plate 23 is arranged on one side of the battery pack 1 to support the battery pack 1, at least two protruding parts 231 protruding towards one side deviating from the battery pack 1 are arranged on the bottom guard plate 23, two adjacent protruding parts 231 are arranged at intervals, a groove 232 is arranged between the two adjacent protruding parts 231, the orthographic projection of one protruding part 231 on a first reference surface at least covers the orthographic projection of the outermost battery pack 1 on the first reference surface, and the first reference surface is parallel to one surface of the bottom guard plate 23 close to the battery pack 1.

In one aspect of the battery device of the disclosure, the orthographic projection of the one protruding portion 231 on the first reference surface covers at least the orthographic projection of the outermost battery pack 1 on the first reference surface, so that the one protruding portion 231 can protect the outermost battery pack 1, and prevent impact force from being transmitted to other battery packs 1 on the inner side through the outermost battery pack 1, thereby protecting a plurality of battery packs 1. On the other hand, other battery packs 1 in the battery device can be protected by one battery pack 1, even if impact force is transmitted to at least one battery pack 1 at the outermost side through the protruding part 231, the at least one battery pack 1 at the outermost side can absorb part or even all of the impact force, so that the impact force is prevented from being transmitted to the battery pack 1 in the battery device, the battery pack 1 in the battery device is prevented from being damaged due to the impact force, and the safety performance of the battery device is improved. On the other hand, the strength of the bottom guard plate 23 can be increased by providing the grooves 232 to increase the impact resistance of the bottom guard plate 23.

In the present exemplary embodiment, as shown with reference to fig. 1 and 2, the battery device may include a battery case 2, the battery case 2 may include a bottom guard plate 23, a protective cover 24, two first side rails 21, and two second side rails 22, and the bottom guard plate 23 and the protective cover 24 may be provided in a rectangular shape. Two first side beams 21 and two second side beams 22 are arranged around the bottom guard plate 23, the two first side beams 21 and the two second side beams 22 are sequentially connected end to form a rectangular frame, the first side beams 21 extend along a first direction X, and the second side beams 22 extend along a second direction Y. A first opening is provided at the other side of the two first side sills 21 and the two second side sills 22 opposite to the bottom guard plate 23, and a protective cover 24 is provided at the first opening so that the protective cover 24 is disposed opposite to the bottom guard plate 23, and the two first side sills 21 and the two second side sills 22 are connected between the protective cover 24 and the bottom guard plate 23. The bottom protection plate 23, the two first side rails 21, and the two second side rails 22 surround the battery accommodating chamber forming the battery case 2.

Of course, in other example embodiments of the present disclosure, the bottom guard plate 23 and the protective cover 24 may be provided in a circular shape, an elliptical shape, a trapezoid shape, or the like, and the side sill may be provided in one or more and formed around the circular shape, the elliptical shape, the trapezoid shape, or the like, such that the battery case 2 is formed in a cylindrical shape, an elliptical cylindrical shape, a prismatic shape, or the like. The battery case 2 may have other shapes, and is not described in detail herein.

In the present exemplary embodiment, eight battery packs 1 may be provided in the battery receiving chamber, and one battery pack 1 may include eighteen unit cells 11. Eighteen single batteries 11 are sequentially arranged along the first direction X to form a group of battery packs 1, and eight group of battery packs 1 are sequentially arranged along the second direction Y.

Of course, in other example embodiments of the present disclosure, three, four, or more sets of battery packs 1 may be provided within the battery receiving chamber; a group of battery packs 1 may include two, three, four, or more unit cells 11.

The first direction X intersects the second direction Y, for example, the first direction X may be disposed perpendicular to the second direction Y.

The bottom guard plate 23 is provided at one side of the battery pack 1, and specifically, the bottom guard plate 23 is provided at the lower side of the battery pack 1 to support the battery pack 1, and the bottom guard plate 23 can protect the battery pack 1.

At least two protrusions 231 protruding toward the side facing away from the battery pack 1 are provided on the bottom cover plate 23, i.e., at least two protrusions 231 protruding downward are provided on the bottom cover plate 23. The adjacent two projections 231 are spaced apart such that a groove 232 is provided between the adjacent two projections 231. That is, the convex portion 231 on the bottom guard plate 23 is not entirely provided, the groove side wall of the groove 232 is also the side wall of the convex portion 231, and the strength of the bottom guard plate 23 can be increased by the groove side wall of the groove 232, that is, the strength of the bottom guard plate 23 can be increased by providing the groove 232, so that the impact resistance of the bottom guard plate 23 can be increased.

The orthographic projection of one projection 231 on the first reference surface covers at least the orthographic projection of the outermost group of battery packs 1 on the first reference surface; for example, the orthographic projection of the outermost one of the battery packs 1 on the first reference surface may coincide with the orthographic projection of one of the protruding parts 231 on the first reference surface, or the orthographic projection of one of the protruding parts 231 on the first reference surface covers the orthographic projection of the outermost one of the battery packs 1 on the first reference surface, and the orthographic projection area of one of the protruding parts 231 on the first reference surface is larger than the orthographic projection of the outermost one of the battery packs 1 on the first reference surface. Of course, the orthographic projection of the outermost adjacent two sets of battery packs 1 on the first reference surface may coincide with the orthographic projection of one protruding portion 231 on the first reference surface, or the orthographic projection of one protruding portion 231 on the first reference surface covers the orthographic projection of the outermost adjacent two sets of battery packs 1 on the first reference surface, and the orthographic projection area of one protruding portion 231 on the first reference surface is larger than the orthographic projection of the outermost adjacent two sets of battery packs 1 on the first reference surface.

Of course, the orthographic projection of the other projection 231 on the first reference surface covers at least the orthographic projection of the outermost other battery pack 1 on the first reference surface.

Since the outermost battery pack 1 is most susceptible to impact, the arrangement is such that one protruding portion 231 can protect at least one of the outermost battery packs 1, and prevent impact force from being transmitted to other battery packs 1 inside through the outermost battery pack 1, thereby achieving the effect of protecting a plurality of battery packs 1.

In addition, the battery pack 1 is disposed at the outermost side, and other battery packs 1 in the battery device can be protected by the battery pack 1, even if impact force is transmitted to at least one battery pack 1 at the outermost side through the protruding portion 231, the at least one battery pack 1 at the outermost side can absorb part or even all of the impact force, so that the impact force is prevented from being transmitted to other battery packs 1 in the battery device, and all battery packs 1 in the battery device are prevented from being damaged due to the impact force.

In particular, the advantage is more remarkable than the structure in which both end portions of all the battery packs 1 are provided at the outermost sides; if both end portions of all the battery packs 1 are disposed at the outermost sides, since the outermost sides are most likely to receive an impact, the impact force is transmitted to all the battery packs 1 at the outermost sides through the protrusions 231 in the case of a large impact force, resulting in damage to all the battery packs 1 due to the impact force.

The outermost side refers to a position where the battery device is mounted to the electric device, and the electric device may be an electric vehicle, for example. Specifically, for example, after the battery device is mounted on the electric vehicle, other devices are disposed on two opposite sides of the first direction X of the battery device, and no other devices are disposed on two opposite sides of the second direction Y of the battery device, so that two opposite sides of the second direction Y of the battery device are all outermost sides of the battery device, and there are two outermost sides, and therefore, orthographic projections of the two protruding portions 231 on the first reference plane cover orthographic projections of at least two outermost battery packs 1 on the first reference plane in a one-to-one correspondence manner, and at least one battery pack 1 on the two outermost sides is protected by the two protruding portions 231 in a one-to-one correspondence manner.

The first reference surface is parallel to the surface of the bottom cover plate 23 adjacent to the battery pack 1, and may be a plane formed by the first direction X and the second direction Y.

Specifically, referring to fig. 3, the bottom guard plate 23 may include a frame portion 233 and a body portion 235, the frame portion 233 may include an outer peripheral frame portion 2331, and the outer peripheral frame portion 2331 may be provided as a rectangular frame adapted to the bottom guard plate 23. At least two protruding parts 231 and at least one groove 232 are arranged on the body part 235, and the specific forming method is as follows: a flat plate may be provided, and the body portion 235 is punched from the side of the flat plate that is close to the battery pack 1 after installation to form at least two protruding portions 231 and at least one recess 232. The peripheral edge portion of the body portion 235 and the outer peripheral frame portion 2331 may be connected by bolts 236 to achieve detachable connection of the frame portion 233 and the body portion 235 such that the protruding portion 231 is detachably connected to the frame portion 233. After the bulge 231 of the bottom guard plate 23 is deformed by impact force, the deformed bulge 231 can be detached, and a new bulge 231 can be replaced, so that the impact resistance of the bottom guard plate 23 is maintained. Of course, the peripheral edge portion of the body portion 235 and the frame portion 233 may be connected by rivets, adhesive, or the like, so that the frame portion 233 and the body portion 235 are detachably connected, and the protruding portion 231 is detachably connected to the frame portion 233.

Of course, in other example embodiments of the present disclosure, referring to fig. 4, the bottom guard plate 23 may include a rim portion 233 and at least two protrusions 231. The rim portion 233 may include an outer peripheral rim portion 2331 of a rectangular frame provided to be fitted with the bottom guard plate 23, and at least one connection plate 2332 connected to opposite sides of the rectangular frame in the first direction X, and the outer peripheral rim portion 2331 may be connected to the first side rail 21 and the second side rail 22, the connection plate 2332 extending in the second direction Y. The connection plate 2332 forms a groove bottom wall of the groove 232 between adjacent two of the projections 231. The peripheral edge portion of the protruding portion 231 and the frame portion 233 may be connected by screws to achieve detachable connection of the protruding portion 231 and the frame portion 233. After the bulge 231 of the bottom guard plate 23 is deformed by impact force, the deformed bulge 231 can be detached, and a new bulge 231 can be replaced, so that the impact resistance of the bottom guard plate 23 is maintained. Of course, the peripheral edge portion of the protruding portion 231 and the frame portion 233 may be connected by rivets, adhesive, or the like, so that the protruding portion 231 and the frame portion 233 are detachably connected.

Referring to fig. 3, the bottom guard plate 23 has a thickness H1, a distance D1 between a side of the protruding portion 231 facing away from the battery pack 1 and a side of the peripheral frame portion 2331 facing away from the battery pack 1, and a ratio of H1 to D1 is 0.02 or more and 0.06 or less, for example, a ratio of H1 to D1 may be 0.023, 0.025, 0.028, 0.03, 0.032, 0.035, 0.037, 0.04, 0.043, 0.045, 0.048, 0.05, 0.052, 0.055, 0.057, and the like.

If the ratio of H1 to D1 is too large, the thickness of the bottom guard plate 23 is too large, which increases the weight of the bottom guard plate 23 and is not beneficial to improving the energy density of the battery device; or the distance between the side of the protruding part 231 facing away from the battery pack 1 and the side of the peripheral frame part 2331 facing away from the battery pack 1 is too small, i.e., the protruding height of the protruding part 231 is too small, so that the protruding part 231 cannot achieve the impact resistance.

If the ratio of H1 to D1 is too small, the thickness of the bottom guard plate 23 is too small, or the distance between the side of the protruding portion 231 facing away from the battery pack 1 and the side of the peripheral frame portion 2331 facing away from the battery pack 1 is too large, that is, the protruding height of the protruding portion 231 is too high, so that the strength of the bottom guard plate 23 is insufficient, and the impact resistance cannot be achieved.

The ratio range is beneficial to improving the energy density of the battery device; the bottom guard plate 23 has sufficient strength to provide impact resistance.

In the height direction Z, a distance D1 between a surface of the protruding portion 231 facing away from the battery pack 1 and a surface of the peripheral frame portion 2331 facing away from the battery pack 1 is 20 mm or more and 35 mm or less, and the height direction Z is perpendicular to the first reference surface. For example, the distance D1 between the side of the projection 231 facing away from the battery pack 1 and the side of the peripheral frame portion 2331 facing away from the battery pack 1 may be 22 mm, 25 mm, 27 mm, 30 mm, 33 mm, or the like.

If the distance D1 between the face of the projection 231 facing away from the battery pack 1 and the face of the peripheral frame portion 2331 facing away from the battery pack 1 is excessively large, the protruding height of the projection 231 is excessively large, so that the battery device occupies a large space in the height direction Z.

If the distance D1 between the face of the protruding portion 231 facing away from the battery pack 1 and the face of the peripheral frame portion 2331 facing away from the battery pack 1 is too small, the protruding height of the protruding portion 231 is too small, so that the protruding portion 231 cannot play a role in absorbing impact force, and cannot protect the battery pack 1.

The above numerical range not only ensures that the battery device does not occupy a larger space in the height direction Z; the protruding portion 231 can absorb impact force and protect the battery pack 1.

The recess 232 is recessed with respect to the protrusion 231, but the recess 232 is protruding with respect to the outer peripheral frame portion 2331, so that after the recess 232 receives an impact force, a part of the impact force can be absorbed, and the impact force is prevented from being transmitted to the battery pack 1, thereby protecting the battery pack 1 to a certain extent.

Specifically, in the height direction Z, the distance D2 between the groove bottom wall of the groove 232 and the face of the outer peripheral frame portion 2331 facing away from the battery pack 1 is 1 mm or more and 5 mm or less, for example, the distance between the groove bottom wall of the groove 232 and the face of the outer peripheral frame portion 2331 facing away from the battery pack 1 may be 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm, 3.3 mm, 3.5 mm, 3.8 mm, 4 mm, 4.2 mm, 4.5 mm, 4.7 mm, or the like.

If the distance D2 between the bottom wall of the groove 232 and the side of the outer peripheral frame portion 2331 facing away from the battery pack 1 is too large, that is, the depth of the groove 232 is too shallow, the groove 232 cannot achieve the effect of increasing the strength and impact resistance of the bottom guard plate 23.

If the distance D2 between the bottom wall of the groove 232 and the surface of the outer peripheral frame portion 2331 facing away from the battery pack 1 is too small, that is, the depth of the groove 232 is too deep, so that after the groove 232 receives the impact force, the impact force is completely transmitted to the battery pack 1, and a certain protection effect cannot be achieved on the battery pack 1.

The above numerical range not only allows the grooves 232 to increase the strength and impact resistance of the bottom guard plate 23; in addition, after the groove 232 receives the impact force, a part of the impact force can be absorbed, so that the impact force is prevented from being completely transmitted to the battery pack 1, and a certain protection effect is achieved on the battery pack 1.

In the present exemplary embodiment, referring to fig. 2, the orthographic projection of the groove 232 on the first reference surface covers at least the orthographic projections of the adjacent two groups of battery packs 1 on the first reference surface, for example, the orthographic projection of the groove 232 on the first reference surface may cover the orthographic projections of the adjacent two groups of battery packs 1 on the first reference surface, so that the orthographic projections of the adjacent two groups of battery packs 1 on the first reference surface may be located within the orthographic projection of the groove 232 on the first reference surface; it is also possible that the orthographic projection of the groove 232 on the first reference surface covers the orthographic projection of the adjacent three groups of battery packs 1 on the first reference surface, so that the orthographic projection of the adjacent three groups of battery packs 1 on the first reference surface is located within the orthographic projection of the groove 232 on the first reference surface; that is, the length of the groove 232 in the first direction X is the same as the length of the protrusion 231 in the first direction X, and the width of the groove 232 in the second direction Y is at least the sum of the widths of the two battery packs 1 in the second direction Y.

After the bottom guard plate 23 (whether the projection 231 or the groove 232) is impacted, the groove 232 is the closest to the battery pack 1, so the groove 232 impacts the battery pack 1 first. If the groove 232 is set narrower, the area at the groove 232 is made smaller; under the same impact force, the impact pressure generated on the battery pack 1 is large, and the battery pack 1 is easily damaged.

The orthographic projection of the groove 232 on the first reference plane at least covers the orthographic projections of two adjacent battery packs 1 on the first reference plane, and after the bottom guard plate 23 (whether the protruding part 231 or the groove 232) is impacted, even if the groove 232 is impacted to the battery packs 1, as at least two battery packs 1 are impacted, the impact pressure is smaller, and the damage of the battery packs 1 is avoided.

Further, referring to fig. 1, the battery device may further include a heat exchange plate 3, the heat exchange plate 3 being disposed between the battery pack 1 and the bottom cover plate 23. A heat exchange flow passage is arranged in the heat exchange plate 3. When the battery needs to be heated, a heat exchange medium with higher temperature can be introduced into the heat exchange flow channel, and the heat of the heat exchange medium is transferred to the battery to heat the battery; when the battery needs to be cooled, a heat exchange medium with lower temperature can be introduced into the heat exchange flow channel, and the heat of the battery is transferred to the heat exchange medium, so that the battery is cooled.

Not only can the heat exchange effect be realized through the heat exchange plate 3, but also the heat exchange plate 3 can absorb a part of impact force transmitted from the bottom guard plate 23 to improve the protection effect on the battery pack 1.

The heat exchange plate 3 may also be set to be a rectangular plate adapted to the bottom protection plate 23, and the heat exchange plate 3 is fixedly connected with the outer peripheral frame portion 2331 of the bottom protection plate 23, for example, a plurality of first through holes may be provided on the outer peripheral frame portion 2331 of the bottom protection plate 23, a plurality of second through holes may be provided on the heat exchange plate 3, and the first through holes and the second through holes are disposed right opposite to each other, and the fixing bolts sequentially penetrate through the first through holes and the second through holes and are screwed into the threaded holes on the first side beam 21 and the second side beam 22, thereby not only fixedly connecting the bottom protection plate 23 with the heat exchange plate 3, but also fixedly connecting the bottom protection plate 23 and the heat exchange plate 3 with the first side beam 21 and the second side beam 22.

In the present exemplary embodiment, no sealing layer is provided between the heat exchange plate 3 and the outer peripheral frame portion 2331 of the bottom shield plate 23, so that the sealing effect between the heat exchange plate 3 and the bottom shield plate 23 is poor, and water can flow between the heat exchange plate 3 and the bottom shield plate 23 through the gap between the heat exchange plate 3 and the outer peripheral frame portion 2331 of the bottom shield plate 23. Through holes 234 are formed in the bottom guard plate 23, so that water flowing between the heat exchange plate 3 and the bottom guard plate 23 can be discharged through the through holes 234, and corrosion of the bottom guard plate 23 caused by long-time storage of water between the heat exchange plate 3 and the bottom guard plate 23 is avoided.

Further, the through holes 234 are formed at the lowest position of the bottom guard plate 23, so that accumulated water can smoothly flow out through the through holes 234, and no residue is generated basically, so that corrosion of the bottom guard plate 23 caused by long-time storage of water between the heat exchange plate 3 and the bottom guard plate 23 is avoided.

A gap is provided between the bottom shield 23 and the heat exchange plate 3, and the width of the gap is 3 mm or more and 30 mm or less, for example, the width of the gap may be 5 mm, 7 mm, 10 mm, 13 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 27 mm, or the like. The gaps include a first gap 41 and a second gap 42.

Specifically, the first gap 41 is provided between the side of the convex portion 231 of the bottom shielding plate 23, which is close to the heat exchange plate 3, and the heat exchange plate 3.

A second gap 42 is arranged between one surface of the connecting plate 2332 at the groove 232, which is close to the heat exchange plate 3, and the heat exchange plate 3.

In addition, in other example embodiments of the present disclosure, the heat exchange plate 3 may not be disposed between the bottom guard plate 23 and the battery pack 1, in which case a support plate may be disposed between the bottom guard plate 23 and the battery pack 1 to support the battery pack 1 together with the bottom guard plate 23.

The terms "parallel" and "perpendicular" as used in this application may not only be perfectly parallel, perpendicular, but may also have some error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A battery device, characterized by comprising:

the battery pack comprises at least two single batteries, wherein the at least two single batteries are sequentially arranged along a first direction, the plurality of groups of battery packs are sequentially arranged along a second direction, and the first direction is intersected with the second direction;

the battery pack comprises a battery pack and a bottom guard plate, wherein the battery pack is arranged on one side of the battery pack, the bottom guard plate is used for supporting the battery pack, at least two protruding parts protruding towards one side of the battery pack are arranged on the bottom guard plate, two adjacent protruding parts are arranged at intervals, a groove is formed between the two adjacent protruding parts, the orthographic projection of one protruding part on a first reference surface at least covers the orthographic projection of the outermost battery pack on the first reference surface, and the first reference surface is parallel to one surface, close to the battery pack, of the bottom guard plate.

2. The battery device according to claim 1, characterized in that the battery device further comprises:

and the heat exchange plate is arranged between the battery pack and the bottom guard plate.

3. The battery device according to claim 2, wherein a sealing layer is not provided between the heat exchange plate and an outer peripheral frame portion of the bottom plate, and the bottom plate is provided with a through hole.

4. The battery device according to claim 3, wherein the through hole is provided at a lowest position of the bottom cover plate.

5. The battery device according to any one of claims 2 to 4, wherein a gap having a width of 3 mm or more and 30 mm or less is provided between the bottom cover plate and the heat exchange plate.

6. The battery device according to any one of claims 2 to 4, wherein the bottom cover includes:

and the protruding part is detachably connected with the frame part.

7. The battery device according to claim 6, wherein the frame portion includes an outer peripheral frame portion fixedly connected to the heat exchange plate, the bottom plate has a thickness H1, a distance between a face of the protruding portion facing away from the battery pack and a face of the outer peripheral frame portion facing away from the battery pack is D1, and a ratio of H1 to D1 is 0.02 or more and 0.06 or less.

8. The battery device according to claim 6, wherein the frame portion includes an outer peripheral frame portion fixedly connected to the heat exchange plate, and a distance D1 between a face of the protruding portion facing away from the battery pack and a face of the outer peripheral frame portion facing away from the battery pack is 20 mm or more and 35 mm or less in a height direction perpendicular to the first reference plane.

9. The battery device according to claim 6, wherein the frame portion includes an outer peripheral frame portion fixedly connected to the heat exchange plate, and a distance D2 between a bottom wall of the groove and a face of the outer peripheral frame portion facing away from the battery pack is 1 mm or more and 5 mm or less in a height direction perpendicular to the first reference surface.

10. The battery device of any one of claims 1-4, wherein the orthographic projection of the groove on the first reference surface covers at least orthographic projections of two adjacent battery packs on the first reference surface.