CN218039603U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and discloses a battery device; the battery device comprises a battery box, a single battery and a support piece; the battery box comprises a bottom plate; the single battery is arranged in the battery box and comprises a battery body and a battery pole column, the battery pole column is connected with the battery body and protrudes out of the battery body, and at least part of the battery pole column of the single battery closest to the bottom plate is positioned on one side of the battery body close to the bottom plate; the supporting piece is fixedly connected with the battery box and arranged between the battery body and the bottom plate so as to support the single batteries. The battery device can avoid the interference between the battery pole and the bottom plate; the single batteries are protected to avoid damage to the single batteries; and the energy density is high.

Description

Battery device

Technical Field

The present disclosure relates to the field of battery technologies, and particularly, to a battery device.

Background

With the rapid development of modern industry, the problems of environmental pollution, energy shortage, resource exhaustion and the like are more and more prominent. In order to maintain the sustainable development of economy, protect the environment and energy supply of human living, zero emission of the battery device is the first choice as a new energy source.

However, the battery post in the battery device interferes with the bottom plate.

It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcome the disadvantage that the battery post of the related art may interfere with the bottom plate, and to provide a battery device in which the battery post may not interfere with the bottom plate.

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

a battery box including a bottom plate;

the single battery is arranged in the battery box and comprises a battery body and a battery post, the battery post is connected with the battery body and protrudes out of the battery body, and at least part of the battery post of the single battery closest to the bottom plate is positioned on one side of the battery body close to the bottom plate;

and the supporting piece is fixedly connected with the battery box and arranged between the battery body and the bottom plate so as to support the single batteries.

According to the battery device, the battery pole is connected to the battery body and protrudes out of the battery body, and at least part of the battery pole is located on one side, close to the bottom plate, of the battery body; after the single batteries are installed in the battery box, the battery pole can interfere with the bottom plate, and the supporting piece is arranged between the battery body and the bottom plate to support the single batteries. On one hand, after the battery body is supported by the supporting piece, the supporting piece lifts the single battery, so that the single battery is prevented from contacting the bottom plate, and further, the battery pole is prevented from interfering with the bottom plate; on the other hand, the supporting member can increase the strength of the battery device, and after the battery device is installed on electric equipment (such as an electric vehicle), even if objects such as stones and solid particles brought by wheels hit a bottom plate of the battery device in the running process of the electric vehicle, the hitting force cannot be transmitted to the single battery or is transmitted to the single battery to be small, so that the single battery is protected and is prevented from being damaged; on the other hand, because the battery post protrudes out of the battery body, and the battery post can not completely cover the surface of the battery body, which is provided with the battery post, an accommodating gap is formed between the battery body and the bottom plate, and a support piece is arranged between the battery body and the bottom plate, so that the accommodating gap is occupied by the support piece, the space utilization rate of the battery device is improved, and the energy density of the battery device is improved.

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 present disclosure and together with the description, serve to explain the principles of the disclosure. It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive effort.

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

Fig. 2 is a schematic structural view of a battery case and a support member of the battery device of fig. 1.

Fig. 3 is a schematic structural view of another exemplary embodiment of a battery device according to the present disclosure.

Fig. 4 is a schematic structural diagram of yet another exemplary embodiment of a battery device according to the present disclosure.

Fig. 5 is a schematic structural diagram of yet another exemplary embodiment of a battery device according to the present disclosure.

Fig. 6 is a schematic perspective view of the heat exchange plate in fig. 5.

Description of the reference numerals:

1. a single battery; 11. a battery body; 12. a battery post; 13. a groove; 14. a diaphragm; 15. a flange structure; 1a, a battery pack;

2. a temperature regulating structure;

3. a battery box; 31. a protective cover; 32. a base plate; 33. a side plate; 34. a cross beam; 35. a stringer; 36. a frame beam;

4. a support member; 41. a support beam; 42. a support plate;

51. a first heat-conducting adhesive layer; 52. a second heat-conducting adhesive layer; 53. a heat conducting portion;

6. a heat exchange plate; 61. accommodating grooves;

7. a buffer layer;

z, third direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description 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," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be understood that if the illustrated device is turned upside down, elements described as "upper" will be those that are "lower". 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 via another structure.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate. "and/or" is only an association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The present disclosure provides a battery device, which may include a battery case 3, a unit battery 1, and a support 4, as shown with reference to fig. 1 to 6; the battery case 3 may include a bottom plate 32; the single battery 1 is arranged in the battery box 3, the single battery 1 comprises a battery body 11 and a battery post 12, the battery post 12 is connected with the battery body 11 and protrudes out of the battery body 11, and at least part of the battery post 12 of the single battery 1 closest to the bottom plate 32 is positioned on one side of the battery body 11 close to the bottom plate 32; the supporting member 4 is fixedly connected to the battery box 3 and disposed between the battery body 11 and the bottom plate 32 to support the single battery 1.

According to the battery device, on one hand, after the battery body 11 is supported by the support piece 4, the support piece 4 lifts the single battery 1, so that the single battery 1 is prevented from contacting the bottom plate 32, and further the battery pole 12 is prevented from interfering with the bottom plate 32; on the other hand, the supporting member 4 can increase the strength of the battery device, and after the battery device is installed in an electric device (for example, an electric vehicle), even if an object such as stones and solid particles brought by wheels smashes the bottom plate 32 of the battery device in the operation process of the electric vehicle, the smashing force cannot be transmitted to the single battery 1, or the smashing force transmitted to the single battery 1 is very small, so that the single battery 1 is prevented from being damaged; on the other hand, because battery post 12 is outstanding in battery body 11, and battery post 12 can not cover the one side of battery body 11 that is provided with battery post 12 completely moreover, consequently, still be formed with the accommodation gap between battery body 11 and bottom plate 32, be provided with support piece 4 between battery body 11 and bottom plate 32 to make support piece 4 occupy the accommodation gap, and then improve battery device's space utilization, improve battery device's energy density.

In the present exemplary embodiment, referring to fig. 1 to 5, the battery device may include a battery box 3, the battery box 3 may include a bottom plate 32, a protective cover 31, and four side plates 33, the bottom plate 32 and the protective cover 31 may be configured in a rectangular shape, the four side plates 33 are disposed around the bottom plate 32, the four side plates 33 are connected end to form a rectangular ring, the protective cover 31 is disposed on the other side of the four side plates 33, and the protective cover 31 is disposed opposite to the bottom plate 32. The bottom plate 32, the protective cover 31, and the four side plates 33 surround to form a receiving space.

Of course, in other example embodiments of the present disclosure, the bottom plate 32 and the protective cover 31 may be provided in a circular shape, an oval shape, a trapezoidal shape, etc., and the side plates 33 may be provided in one or more shapes and formed in a circular shape, an oval shape, a trapezoidal shape, etc., so that the battery case 3 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. Other shapes of the battery box 3 can be used, which are not described herein. In addition, in the case where a plurality of battery devices are stacked, the battery device located therebelow may not be provided with the protective cover 31.

In some exemplary embodiments, the battery box 3 may further include four frame beams 36, the four frame beams 36 are disposed on one side of the four side plates 33 close to the accommodating space in a one-to-one correspondence, and the four frame beams 36 are connected end to form a circle. At least one cross beam 34 may also be disposed within the receiving space, with the at least one cross beam 34 dividing the receiving space into at least two receiving chambers. At least one longitudinal beam 35 may be further disposed in the accommodating space, and the at least one longitudinal beam 35 divides the accommodating space into at least two accommodating cavities. The direction of extension of the cross beams 34 and the direction of extension of the longitudinal beams 35 may intersect, for example, be perpendicular. The accommodating space can be provided with only the transverse beam 34 or only the longitudinal beam 35, or the transverse beam 34 and the longitudinal beam 35 can be provided, so that the accommodating space can be divided into more accommodating cavities, for example, the accommodating space is divided into four accommodating cavities by one transverse beam 34 and one longitudinal beam 35. The transverse beams 34 and/or the longitudinal beams 35 can increase the strength of the battery box 3, and ensure the protection effect on the single batteries 1 in the battery box.

In the present exemplary embodiment, a plurality of unit batteries 1 are disposed in one accommodation chamber, and the unit batteries 1 may include a battery body 11 and a battery post 12, and the like. The battery body 11 may include a battery case and a cell.

The battery shell can include two relative first surfaces and four second surfaces that encircle the first surface setting, and battery shell is approximate cuboid structure promptly, and the area of first surface is greater than the area of second surface, and battery utmost point post 12 sets up on the first surface to can guarantee that battery utmost point post 12 has a reliable holding surface, with this stability of guaranteeing battery utmost point post 12.

It should be noted that the two opposing first surfaces are large surfaces of the battery case, and the four second surfaces are small surfaces of the battery case, the four second surfaces include two pairs of small surfaces, i.e., a first pair of small surfaces extending in the length direction of the battery case and a second pair of small surfaces extending in the width direction of the battery case, and the areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but are smaller than the areas of the large surfaces (first surfaces).

Referring to fig. 1, 3 and 4, the battery case may be provided with two grooves 13, and the two grooves 13 and the two battery posts 12 may be respectively located on two opposite surfaces of the battery case. At this time, when the single batteries 1 are grouped, the battery post 12 of another single battery 1 is received in the groove 13, for example, two adjacent single batteries are a first single battery 1a and a second single battery 1b, and the battery post 12 of the second single battery 1b is located in the groove 13 of the first single battery 1 a; thereby increasing the energy density of the battery pack 1 a.

Of course, in other example embodiments of the present disclosure, the battery case may be further configured as a cylinder, a prism, a circular truncated cone, and other structures as needed, which are not described herein again. The material of the battery case may be aluminum, steel, or other metals and alloys, and of course, other materials may also be used, which are not described herein.

In the present exemplary embodiment, a battery cell is provided in the accommodating portion of the battery case, and the battery cell is provided as a rectangular parallelepiped adapted to the battery case. Be provided with the electric core protection film outside electric core, the electric core protection film sets up to the cuboid tube-shape with electric core looks adaptation, is provided with the electric core layer board in the bottom of electric core, and electric core layer board makes to be insulating between electric core and the battery casing with electric core protection film.

Two battery poles 12, namely a positive pole and a negative pole, are arranged on one side of the battery cell close to the first surface. The positive and negative posts may protrude from the first surface outside the battery case such that the battery post 12 is connected to the battery body 11 and protrudes from the battery body 11.

An explosion-proof valve can be arranged between the positive pole column and the negative pole column. The explosion-proof valve can be the weak structure of setting on the top surface, and after electric core emergence thermal runaway, high temperature gas, mars and high temperature solid particulate matter can break through the weak structure (explosion-proof valve) on the battery case, spout from weak structure department. The weak structure can be a scratch or a notch arranged on the top surface; the thickness of the top surface of the explosion-proof valve can be smaller than the thickness of the top surfaces of other positions, so that high-temperature gas, sparks and high-temperature solid particles can firstly burst the explosion-proof valve to be sprayed out.

Part of the circumferential edge of the battery housing is provided with a flange structure 15, the flange structure 15 is not arranged around the circumferential edge of the battery housing, i.e. the flange structure 15 forms a circumferentially non-closed structure, and the flange structure 15 may be one or more, for example, when the battery housing is substantially a rectangular body structure, one side of the battery housing may be provided with the flange structure 15, or adjacent two sides of the battery housing may be provided with the flange structures 15, or only one side of the battery housing is not provided with the flange structure 15, or two opposite sides of the battery housing are respectively provided with the flange structures 15.

The flange structure 15 can be used for increasing the contact area at the connection position of the battery shell to ensure the connection stability, and the flange structure 15 can also be used for fixing the batteries when the batteries are grouped to ensure the reliable fixation of the batteries.

In the present exemplary embodiment, the unit batteries 1 may be provided in plurality, at least two unit batteries 1 are sequentially stacked in the third direction Z in the battery box 3 to form a group of battery packs 1a, and the first surfaces (large surfaces) of the unit batteries 1 are adjacently provided and stacked; the plurality of single batteries 1 form at least two sets of battery packs 1a, and the third direction Z is a direction from the bottom plate 32 to the protective cover 31, and of course, the third direction Z is also a direction from the protective cover 31 to the bottom plate 32. In addition, in other example embodiments of the present disclosure, the unit batteries 1 may be provided as one; in the case where the unit cells 1 may be provided in plural, it may be that one unit cell 1 forms a group, that is, the unit cells 1 are not sequentially stacked in the third direction Z, but a plurality of unit cells 1 are laid side by side in a layer, and the first surface (large surface) of the unit cell 1 is substantially parallel to the bottom plate 32.

Referring to fig. 2, the supporting member 4 is fixedly connected to the battery box 3, specifically, the supporting member 4 has a first end and a second end opposite to each other, the first end may be connected to the frame beam 36, and specifically, the first end may be connected to the frame beam 36 by screws, welding or riveting. The second end may be connected to the cross member 34, and in particular, the second end may be connected to the cross member 34 by means of screws, welding or riveting. The height of the support 4 is 1mm or more and 3mm or less.

In the present exemplary embodiment, the supporting member 4 may be disposed between the battery body 11 and the bottom plate 32 to support the single battery 1, a distance H1 between a surface of the supporting member 4 facing away from the battery body 11 and the battery body 11 is greater than a distance H2 between a surface of the battery post 12 facing away from the battery body 11 and the battery body 11, that is, the supporting member 4 protrudes from the battery post 12. Of course, the distance H1 between the surface of the support member 4 facing away from the battery body 11 and the battery body 11 may be equal to the distance H2 between the surface of the battery post 12 facing away from the battery body 11 and the battery body 11.

In addition, a gap may be provided between the support 4 and the bottom plate 32, and the unit batteries 1 may be raised by the support 4.

Specifically, when the battery post 12 is provided in two, and both the battery posts 12 are provided toward the bottom plate 32, that is, the two battery posts 12 are located on the side of the battery body 11 close to the bottom plate 32, the support member 4 is provided between the two battery posts 12. Therefore, the supporting member 4 does not occupy the internal space of the battery device additionally, but only occupies the space inevitably left between the two battery posts 12, so that the space utilization rate of the battery device is improved, and the energy density of the battery device is improved; after the battery body 11 is supported by the support member 4, the support member 4 lifts the single cell battery 1 to prevent the battery post 12 from contacting the bottom plate 32, thereby preventing the battery post 12 from interfering with the bottom plate 32.

In addition, because in order to guarantee the support intensity of the support piece 4, the material of the support piece 4 is generally aluminum, steel or other metals and alloy materials, and the materials are all conductive materials, a gap is arranged between the support piece 4 and the battery pole 12, so that the short circuit phenomenon caused by the contact between the support piece 4 and the battery pole 12 can be avoided, and the potential safety hazard can not be caused.

Referring to fig. 1 and 3, the support 4 may include at least two support beams 41; alternatively, as shown with reference to fig. 4, the support 4 may include at least one support plate 42. The length of the support beam 41 and the length of the support plate 42 are substantially the same, but the width of the support beam 41 is smaller than that of the support plate 42, so that two support beams 41 can be arranged, the two support beams 41 can be correspondingly arranged close to the two battery poles 12, and the arrangement makes the structural stability good and the strength high. Of course, the number of the support beams 41 and the support plates 42 is merely illustrated above, and may be specifically set as needed.

Can support battery cell 1 through support piece 4, avoid battery cell 1 and bottom plate 32 direct contact, provide accommodation gap for battery post 12 of battery cell 1 to avoid battery post 12 to produce with bottom plate 32 and interfere, can strengthen battery device's intensity moreover. Moreover, after the battery device is installed on an electric device (for example, an electric vehicle), even when the bottom plate 32 of the battery device is hit by objects such as stones and solid particles brought up by wheels during the operation of the electric vehicle, the hitting force is not transmitted to the single battery 1, or the hitting force transmitted to the single battery 1 is small, so that the single battery 1 is prevented from being damaged.

In the present exemplary embodiment, the battery device may further include a temperature adjustment structure 2, and the temperature adjustment structure 2 may be provided side by side with the support member 4 on the side of the battery body 11 on which the battery post 12 is provided.

Specifically, referring to fig. 3, since the support member 4 is further provided between the two battery poles 12, when the support member 4 is two support beams 41, the temperature adjustment structure 2 may be provided between the two support beams 41, and if the gap between the support beam 41 and the battery pole 12 is wide, the temperature adjustment structure 2 may be further provided between the support beam 41 and the battery pole 12. In the case of one support plate 42, the temperature adjustment structure 2 may be provided between the support plate 42 and the battery post 12, i.e. two temperature adjustment structures 2 are provided, so that the support 4 and the temperature adjustment structures 2 are arranged alternately. With such arrangement, the temperature adjusting structure 2 does not occupy the internal space of the battery device, but only occupies the space between the two supporting members 4 and the two battery poles 12, so as to improve the space utilization rate of the battery device and the energy density of the battery device; but also can play a role in supporting the single battery and regulating the temperature.

In addition, referring to fig. 4, the temperature adjusting structure 2 may also be provided in the support 4. The support 4 is generally a tubular profile, so that the support 4 is internally hollow, and the temperature adjustment structure 2 can be arranged in the support 4. With the arrangement, the temperature adjusting structure 2 does not occupy the internal space of the battery device additionally, but only occupies the internal space of the supporting piece 4, so that the space utilization rate of the battery device is improved, and the energy density of the battery device is improved; but also can play a role in supporting the single battery and regulating the temperature.

The temperature adjusting structure 2 can be an insulating layer, and the material of the insulating layer can be insulating cotton, insulating foam boards and the like. Temperature regulation structure 2 also can be the liquid cooling board, is provided with the pipeline of intercommunication in the liquid cooling board, can circulate liquid in the pipeline, and the higher liquid of circulation temperature can reach and carry out the effect of heating to battery cell 1, and the lower liquid of circulation temperature can reach and carry out refrigerated effect to battery cell 1. The temperature adjusting structure 2 can also be a heating plate which can achieve the effect of heating the single battery 1, the temperature has important influence on the single battery 1, and the performance of the single battery 1 is reduced due to the excessively low temperature, so that the single battery cannot work normally; therefore, in northern cold climates, the need to heat the cell 1 is beneficial to the start-up and performance of the cell 1. Of course, the temperature adjustment structure 2 may also be other temperature adjustment devices, which are not described herein.

In the present exemplary embodiment, as shown in fig. 1, the base plate 32 may be provided as a temperature adjustment plate, in which case, a first thermal adhesive layer 51 may be provided between the base plate 32 and the support member 4, and the first thermal adhesive layer 51 may not only adhesively fix the base plate 32 and the support member 4, but also transfer heat between the support member 4 and the base plate 32.

A second heat-conducting adhesive layer 52 can be arranged between the supporting member 4 and the battery body 11, and the second heat-conducting adhesive layer 52 can not only bond and fix the battery body 11 and the supporting member 4, but also transfer heat between the supporting member 4 and the battery body 11; so that heat can be transferred between the bottom plate 32 and the battery body 11, thereby achieving temperature regulation of the unit batteries 1.

In addition, when the support member 4 does not fully occupy the side of the battery body 11 close to the bottom plate 32, the heat conducting portion 53 is disposed between the bottom plate 32 and the battery body 11, and the heat conducting portion 53 can not only bond and fix the battery body 11 and the bottom plate 32, but also transfer heat between the battery body 11 and the bottom plate 32, so that the bottom plate 32 can achieve the effect of adjusting the temperature of the battery body 11.

In some example embodiments of the present disclosure, as shown with reference to fig. 5 and 6, the battery device may further include a heat exchange plate 6, and the heat exchange plate 6 may be provided at a side of the unit battery 1, the side being perpendicular to the base plate 32. The heat exchange plate 6 can transfer heat with the side of the single battery 1, so that the heat exchange plate 6 can achieve the temperature adjusting effect on the side of the battery body 11.

Moreover, the heat exchange plate 6 can be in contact with a plurality of single batteries 1 sequentially stacked in the third direction Z, and can regulate the temperature of the single batteries 1, so that the consistency of temperature regulation is good; moreover, the height of the battery device in the third direction Z is not increased by the heat exchange plate 6, the heat exchange plate 6 does not bear the weight of the plurality of single batteries 1, and the use safety is high.

Under the condition that is provided with at least two sets of group battery 1a, heat transfer board 6 is located between adjacent two sets of group battery 1a, and heat transfer board 6 can carry out the heat transfer with the side of two sets of monomer groups simultaneously for heat transfer board 6 can reach temperature regulation's effect to the side of two sets of monomer groups simultaneously, and heat transfer board 6's utilization ratio is higher.

The single battery 1 may include multiple layers of diaphragms 14 arranged in a stacked manner, that is, the battery core may include multiple layers of diaphragms 14 arranged in a stacked manner, and the diaphragm 14 refers to a layer of diaphragm 14 material between a positive plate and a negative plate of the single battery 1, and is a very critical part in the single battery 1, and has a direct influence on the safety and cost of the single battery 1, and its main function is: and separating the positive plate from the negative plate, preventing electrons in the battery from freely passing through, and allowing ions in the electrolyte to freely pass between the positive plate and the negative plate. Since the separator 14 is not completely in close contact with the positive electrode sheet and the negative electrode sheet of the battery, gaps are formed between the separator 14 and the positive electrode sheet and between the separator 14 and the negative electrode sheet, and heat inside the battery cell 1 is easily conducted through the gaps.

The surface of the heat exchange plate 6, which is attached to the battery pack 1a, is perpendicular to the diaphragm 14, that is, the gap is perpendicular to the surface of the heat exchange plate 6, which is attached to the battery pack 1a, so that the gap of the single battery 1 can be arranged opposite to the heat exchange plate 6, and the heat conducted in the gap can be transferred to the heat exchange plate 6, thereby improving the heat exchange efficiency of the heat exchange plate 6 and achieving better cooling consistency; and the heat exchange plate 6 does not bear the weight of the single battery 1, so that the use safety is high.

The heat exchange plate 6 can be connected to the battery box 3, specifically, the heat exchange plate 6 can be connected to one side of a frame beam 36 of the battery box 3 close to the single battery 1, the heat exchange plate 6 can be reused as a cross beam 34, and the heat exchange plate 6 can also be reused as a longitudinal beam 35; thereby saving the space inside the battery box 3 and reducing the used materials of the battery box 3, thereby lightening the weight of the battery device and improving the energy density.

Be provided with the holding tank 61 that holds the flange structure 15 of single cell 1 on the heat transfer board 6 for in the flange structure 15 of single cell 1 can stretch into the holding tank 61 of heat transfer board 6, not only can prevent the interference of the flange structure 15 of heat transfer board 6 and single cell 1, saved the inside space of battery box 3 moreover, improved battery device's energy density.

In some example embodiments of the present disclosure, the battery device may further include a buffer layer 7, and the buffer layer 7 is attached between the heat exchange plate 6 and the unit cell 1. The material of this buffer layer 7 is flexible heat conduction material, and this buffer layer 7 can be so that heat transfer board 6 and battery cell 1 comparatively closely laminate to be favorable to the heat transfer between heat transfer board 6 and the battery cell 1.

When used for the single battery 1 provided with the flange structure 15, a through groove may be provided on the buffer layer 7, the through groove being disposed opposite to and communicating with the receiving groove 61 on the heat exchange plate 6, for receiving the flange structure 15 of the single battery 1. Alternatively, the buffer layers 7 may be provided in multiple pieces, only between the single cells 1 and the heat exchange plates 6, and no buffer layer 7 is provided at the flange structure 15; of course, the accommodating groove 61 on the heat exchange plate 6 can be wider, and the buffer layer 7 is also arranged in the accommodating groove 61, so that the buffer layer 7 is arranged between the whole single battery 1 and the heat exchange plate 6.

The thickness of the buffer layer 7 may be greater than or equal to the length of the protruding unit cell 1 of the flange structure 15 of the unit cell 1, such that the buffer layer 7 flattens the side of the unit cell 1 provided with the flange structure 15. Of course, the thickness of the buffer layer 7 may be smaller than the length of the protruding unit cell 1 of the flange structure 15 of the unit cell 1, and the above-mentioned effects of close fitting and heat transfer may also be achieved.

In some example embodiments of the present disclosure, a side wall of the heat exchange plate 6 near the single battery 1 is concave to fit with the flange structure 15 of the single battery 1, for example, a side wall of the heat exchange plate 6 near the single battery 1 has a hardness less than that of the rest of the heat exchange plate 6. Specifically, the heat exchange plate 6 is made of a flexible material and is close to one side wall of the single battery 1, so that the heat exchange plate 6 can be tightly attached to the single battery 1, and heat transfer between the heat exchange plate 6 and the single battery 1 is facilitated. Also, in the case where the unit cell 1 is provided with the flange structure 15, the heat exchange plate 6 may be deformed so as to avoid interference with the flange structure 15.

It should be noted that, the terms "parallel" and "perpendicular" in this specification are not completely parallel or perpendicular, but have certain errors; 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 variations, 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 (15)

1. A battery device, comprising:

a battery box including a bottom plate;

the single battery is arranged in the battery box and comprises a battery body and a battery pole column, the battery pole column is connected with the battery body and protrudes out of the battery body, and at least part of the battery pole column of the single battery, which is at least closest to the bottom plate, is positioned on one side of the battery body, which is close to the bottom plate;

and the supporting piece is fixedly connected with the battery box and arranged between the battery body and the bottom plate so as to support the single batteries.

2. The battery device according to claim 1, wherein a distance between a surface of the support member facing away from the battery body and the battery body is greater than or equal to a distance between a surface of the battery post facing away from the battery body and the battery body.

3. The battery apparatus of claim 1, wherein the support comprises at least two support beams.

4. The battery device according to claim 1, wherein the battery post is provided in two and located on one side of the battery body close to the bottom plate, and the support member is provided between the two battery posts.

5. The battery device as claimed in claim 4, wherein a gap is provided between the battery post and the support.

6. The battery device of claim 1, further comprising:

the temperature adjusting structure is arranged side by side with the supporting piece on one surface of the battery body, on which the battery pole is arranged, or in the supporting piece.

7. The battery device according to claim 1, wherein the base plate is provided as a temperature adjustment plate, and the battery device further comprises a first thermal conductive adhesive layer and/or a second thermal conductive adhesive layer and/or a thermal conductive portion; the first heat-conducting adhesive layer is adhered between the bottom plate and the supporting piece; the second heat-conducting adhesive layer is adhered between the supporting piece and the battery body; the heat conduction part is bonded between the bottom plate and the battery body.

8. The battery device according to claim 1, further comprising:

and the heat exchange plate is arranged on the side surface of the single battery, and the side surface is vertical to the bottom plate.

9. The battery device according to claim 8, wherein the battery box further includes a protective cover, the protective cover is disposed opposite to the bottom plate, the plurality of single batteries are disposed, at least two single batteries are sequentially stacked in the battery box along a third direction and form a group of battery packs, the plurality of single batteries form at least two groups of battery packs, and the third direction is a direction from the bottom plate to the protective cover.

10. The battery device of claim 9, wherein the heat exchange plate is disposed between two adjacent sets of the battery packs.

11. The battery device according to claim 9, wherein the single battery comprises a plurality of layers of diaphragms arranged in a stacked manner, and the surfaces of the heat exchange plates, which are attached to the battery pack, are perpendicular to the diaphragms.

12. The battery device according to claim 9, wherein the heat exchange plates are connected to frame beams of the battery box, and the heat exchange plates are reused as cross beams and/or longitudinal beams of the battery box.

13. The battery device of claim 9, wherein the heat exchange plate is provided with a receiving groove for receiving the flange structure of the battery cell.

14. The battery device according to claim 9, further comprising:

the buffer layer is attached between the heat exchange plate and the single battery, and the thickness of the buffer layer is larger than or equal to the length of the flange structure of the single battery, protruding out of the single battery.

15. The battery device of claim 9, wherein a side wall of the heat exchange plate adjacent to the cell is recessed to engage the flange structure of the cell.

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