CN217306652U

CN217306652U - Battery box and battery device

Info

Publication number: CN217306652U
Application number: CN202221204987.5U
Authority: CN
Inventors: 郑立成; 李炜; 肖康
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-08-26
Anticipated expiration: 2032-05-18

Abstract

The utility model relates to a battery technology field provides a battery box and battery device. The battery box includes: the bearing plate and the bearing plate are provided with a bulge convexly towards one side close to each other; and at least part of the gluing area is arranged in the bulge and used for fixing the bottom plate and the bearing plate. At least one of the bearing plate and the bottom plate is convexly provided with a bulge to one side close to each other, and the bulge plays a role in structure reinforcement and improves the firmness of the battery box body. Simultaneously, set up in the arch through setting up the rubber coating district at least part, the rubber coating district is the bonding region between bottom plate and the loading board, is equivalent to both bottom plate and backup pad and strengthens the department bonding at protruding this structure, can be more firm during the atress, is difficult for becoming invalid. The bonding positions of the bottom plate and the support plate are not large-area positions but local positions, so that the flatness of the gluing surface is improved. In addition, the range of the glue coating area is limited at least by the protrusions, so that the thickness and the using amount of the glue layer are regulated and controlled, and the use cost is reduced.

Description

Battery box and battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery box and battery device.

Background

In the related art, if the size of the bottom plate and the carrying plate of the battery box is too large, when the bottom plate and the carrying plate are fixed, the bonding flatness between the bottom plate and the carrying plate cannot be ensured, and the service performance of the battery device is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery box and battery device improves bonding surface roughness to improve battery device's performance.

According to the utility model discloses a first aspect provides a battery box, include:

the bearing plate comprises a bottom plate and a bearing plate, wherein at least one of the bearing plate and the bottom plate is convexly provided with a bulge towards one side close to each other;

and the gluing area is at least partially arranged in the protrusion and used for fixing the bottom plate and the bearing plate.

The utility model discloses battery box, loading board are used for bearing the battery, and the loading board plays the effect of bearing and supporting the battery, and the loading board sets up on the bottom plate, and the bottom plate plays the effect to the loading board protection. At least one of loading board and bottom plate is equipped with the arch to the protruding effect that is close to each other that is equipped with of one side, and the arch plays the effect that the structure is strengthened, and if loading board or bottom plate thickness are thinner, utilize the arch can realize the support to the battery, compensate panel because of the thickness is thinner leads to the condition that support intensity is not enough, improve the fastness of battery box. Simultaneously, set up in the arch through setting up the rubber coating district at least part, the rubber coating district is the bonding region between bottom plate and the loading board, is equivalent to both bottom plate and backup pad and strengthens the department bonding at protruding this structure, can be more firm during the atress, is difficult for becoming invalid. Compared with the direct bonding of two large-size plates in the prior art, at least part of the glue coating area is arranged in the protrusion, the bonding positions of the bottom plate and the support plate are not large-area positions but local positions, and the flatness of the glue coating surface is improved. In addition, the range of the glue coating area is limited at least by the protrusions, so that the thickness and the using amount of the glue layer are regulated and controlled, and the weight and the using cost of the glue layer are reduced.

According to a second aspect of the present invention, a battery device is provided, which includes the above battery box.

The utility model discloses battery device, loading board are used for bearing the battery, and the loading board plays the effect of bearing and supporting the battery, and the loading board sets up on the bottom plate, and the bottom plate plays the effect to the loading board protection. At least one of loading board and bottom plate is equipped with the arch to the protruding effect that is close to each other that is equipped with of one side, and the arch plays the effect that the structure is strengthened, and if backup pad or bottom plate thickness are thinner, utilize the arch can realize the support to the battery, compensate panel because of the thickness is thinner leads to the condition that support intensity is not enough, improves the fastness of battery box. Simultaneously, set up in the arch through setting up the rubber coating district at least part, the rubber coating district is the bonding region between bottom plate and the loading board, is equivalent to both bottom plate and backup pad and strengthens the department bonding at protruding this structure, can be more firm during the atress, is difficult for becoming invalid. Compared with the prior art that two plates with larger sizes are directly bonded, at least part of the glue coating area is arranged in the bulge, the bonding positions of the bottom plate and the supporting plate are not large-area positions but local positions, and the flatness of the glue coating surface is improved. In addition, the range of the glue coating area is limited at least by the protrusions, so that the thickness and the using amount of the glue layer are regulated and controlled, and the weight and the using cost of the glue layer are reduced.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a first schematic diagram of a battery case according to a first exemplary embodiment;

FIG. 2 is a second schematic diagram of a battery housing according to the first exemplary embodiment;

FIG. 3 is a third schematic structural view of a battery housing according to the first exemplary embodiment;

FIG. 4 is a fourth schematic structural view of a battery case according to the first exemplary embodiment;

fig. 5 is a schematic structural view showing a battery device according to the first exemplary embodiment.

The reference numerals are explained below:

1. a base plate; 2. a carrier plate; 3. a glue spreading area; 4. a support member; 5. a battery; 6. a gap;

11. and (4) protruding.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the utility model provides a battery box, please refer to fig. 1 to 5, and the battery box includes bottom plate 1, loading board 2, and loading board 2 is used for bearing battery 5, and loading board 2 plays the effect of bearing and supporting battery 5, and loading board 2 sets up on bottom plate 1, and bottom plate 1 plays the effect to loading board 2 protection. Set up about bottom plate 1 and loading board 2 are along battery 5 direction of height, and bottom plate 1 and loading board 2 that the stack set up are bilayer structure, further guarantee the support effect to battery 5.

It should be noted that the specific structure of the carrier plate 2 is not limited in this embodiment, and specifically, the carrier plate 2 may be a guard, a bracket, a tray, or the like, and is used for carrying or fixing the battery 5. The bearing plate 2 can also be a heat exchange plate, the battery 5 is directly or indirectly arranged on the heat exchange plate, and the heat exchange plate can play a role in bearing the battery 5 and also ensure the heat dissipation effect of the battery 5.

When the bottom plate 1 and the bearing plate 2 are fixed by adhesion, if the size of the bottom plate 1 and the bearing plate 2 is too large, the adhesion flatness between the bottom plate 1 and the bearing plate 2 cannot be ensured. In order to solve the problem, the battery box provided by the embodiment further comprises a glue coating area 3, and at least one of the bearing plate 2 and the bottom plate 1 is convexly provided with a protrusion 11 towards one side close to each other. The glue spreading area 3 is at least partially arranged in the protrusion 11 and used for fixing the bottom plate 1 and the bearing plate 2. Wherein, the glue coating area 3 is used for coating glue, and the glue can be glue solution, structural glue or foam double faced adhesive tape and the like.

Through at least one of loading board 2 and bottom plate 1 to protruding being equipped with arch 11 of one side that is close to each other, arch 11 plays the effect that the structure is strengthened, and if loading board 2 or bottom plate 1's thickness ratio is thinner, utilizes arch 11 can realize the indirect support to battery 5, remedies the panel and leads to the condition that support strength is not enough because of thickness is thinner, improves the fastness of battery box. Simultaneously, set up in arch 11 through setting up rubber coating district 3 at least part, rubber coating district 3 is the bonding region between bottom plate 1 and loading board 2, is equivalent to both bottom plate 1 and backup pad and strengthens the department bonding in this structure of arch 11, can be more firm during the atress, is difficult for losing efficacy. Compared with the direct bonding of two large-size plates in the prior art, at least part of the glue coating area 3 is arranged in the bulge 11, the bonding positions of the bottom plate 1 and the supporting plate are not large-area positions but local positions, and the flatness of the glue coating surface is improved. In addition, the range of the glue coating area 3 is at least limited by the bulges 11, so that the thickness and the dosage of the glue layer can be regulated and controlled, and the weight and the use cost of the glue layer are reduced.

It should be noted that the protrusion 11 may be disposed on one side of the loading plate 2 close to the bottom plate 1, that is, the protrusion 11 is disposed on the bottom of the loading plate 2 along the height direction of the battery 5, and the protrusion 11 is used for structural reinforcement of the loading plate 2 and at the same time, the protrusion 11 acts as a supporting point of the loading plate 2; the protrusion 11 may also be disposed on one side of the bottom plate 1 close to the loading plate 2, that is, the protrusion 11 is disposed on the top of the bottom plate 1 along the height direction of the battery 5, and the protrusion 11 serves to strengthen the structure of the loading plate 2, and the protrusion 11 serves to support the loading plate 2. The position of the projection 11 and the support may also be integrated in the above two cases.

It should be especially noted that, if loading board 2 or bottom plate 1 specifically are heat transfer board, because the inside runner that is provided with of liquid cooling board, if be provided with protruding 11 on liquid cooling board and probably have great processing degree of difficulty, can influence arranging of runner moreover, be unfavorable for heat transfer medium to carry out the heat transfer to the battery through the runner, protruding 11 can only set up on the panel that is not liquid cooling board this moment.

It should be noted that, if the protrusion 11 is disposed on the bottom plate 1, the protrusion 11 and the bottom plate 1 may be a split structure or an integrally formed structure, for example, the protrusion 11 and the bottom plate 1 are formed by stamping, so as to save the link of assembling parts and reduce the production time and cost. If the protrusion 11 is disposed on the carrier plate 2, the detailed form is similar, and therefore, the detailed description is omitted.

In one embodiment, as shown in fig. 1 to 3, the battery box provided in this embodiment further includes a supporting member 4, and the supporting member 4 is disposed between the bottom plate 1 and the loading plate 2 for supporting the loading plate 2. If only utilize arch 11 to the support of loading board 2, loading board 2 similar point supports the supporting effect that is difficult to reach the preferred, and loading board 2 if thinner, the structure of loading board 2 self is weaker, through be provided with support piece 4 between bottom plate 1 and loading board 2, support piece 4 has played the effect to loading board 2 auxiliary stay, improve the supporting effect of loading board 2, under arch 11 and support piece 4's combined action, further improve the structural stability of loading board 2.

In one embodiment, the number of the protrusions 11 and the support 4 is plural, and the support 4 is disposed between two adjacent protrusions 11. Wherein, the parallel interval of a plurality of archs 11 sets up, and the parallel interval of a plurality of support piece 4 sets up, and a plurality of archs 11 and a plurality of support piece 4 form a plurality of support point positions to loading board 2, guarantee the atress homogeneity of loading board 2. Set up between two adjacent archs 11 through support piece 4, support piece 4 and arch 11 crisscross setting promptly for the part between two adjacent archs 11 realizes supporting through support piece 4 to loading board 2, avoids the condition that the corresponding part appears collapsing between loading board 2 and two adjacent archs 11, guarantees loading board 2 at the support stability on a large scale.

In one embodiment, the protrusion 11 is extended along the width direction of the base plate 1, or the protrusion 11 is extended along the length direction of the base plate 1. Through the setting of arch 11 along the width direction extension of bottom plate 1, be equivalent to protruding 11's extending direction and bottom plate 1's width direction parallel, guarantee loading board 2 along bottom plate 1 width direction's fixed effect. Through the setting of protruding 11 along the length direction extension of bottom plate 1, be equivalent to protruding 11's extending direction and bottom plate 1's length direction parallel, guarantee loading board 2 along bottom plate 1 length direction's fixed effect.

It can be understood that, along the length direction of the base plate 1, the width of the protrusions 11, the interval between two adjacent protrusions 11, and the number of the protrusions 11 are adapted to the length of the base plate 1, and these parameters can be adjusted according to actual production conditions. When the length of bottom plate 1 is longer, if protruding 11 extends along 1 length direction of bottom plate, lead to protruding 11 glue coating district 3 also longer, this moment because the area in glue coating district 3 is too big, when bonding with loading board 2, lead to the unevenness that bonds easily, then protruding 11 extends along the width direction of bottom plate 1 as far as possible, in order to guarantee the area in glue coating district 3 within suitable range, be equivalent to cutting into a plurality of components of a whole that can function independently structures with the glue coating district 3 of large tracts of land, multiple spot, the substep bonds, guarantee the roughness on bonding surface.

It will be appreciated that the area between two adjacent projections 11 provides a receiving space for the support 4. An accommodating area is formed between the protrusion 11 and the supporting piece 4 adjacent to the protrusion 11 and between the loading plate 2 and the bottom plate 1 close to each other, and the accommodating area is used for accommodating part of the glue. If the glue applied in the glue application area 3 is glue, the glue may drain down from the top surface of the protrusion 11 along the side surface to the accommodation area, and the accommodation area functions as a glue overflow groove.

In one embodiment, the edges of the glue area 3 are flush with the edges of the protrusions 11, or a gap 6 is provided between at least one of the edges of the glue area 3 and at least one of the protrusions 11.

As shown in fig. 1, if the edge of the glue coating area 3 is flush with the edge of the protrusion 11, and the glue coating area 3 does not exceed the edge of the protrusion 11, the risk of glue overflow is reduced, the appearance is affected, and the risk of glue blocking other structures is reduced.

As shown in fig. 4, if a gap 6 is provided between at least one edge of the glue-applying region 3 and at least one of the protrusions 11, i.e. there is a gap 6 between the glue-applying region 3 and at least one corresponding edge of the protrusion 11, the gap 6 can provide a certain buffer space for the compression or overflow of the glue, so as to prevent the glue from exceeding the edge of the protrusion 11 after being compressed or overflowing.

It should be noted that the glue spreading area 3 cannot be disposed outside the protrusion 11, that is, there is no glue overflow from the protrusion 11, so as to control the thickness of the glue in the glue spreading area 3, thereby reducing the cost of the raw material.

It should be noted that, when the glue spreading area 3 is used for spreading glue, the gap 6 can be properly reduced to prevent the situation that the glue amount in the glue spreading area 3 is too small, so as to ensure the fixing effect between the bottom plate 1 and the bearing plate 2.

In one embodiment, the support 4 is provided with a buffer; and/or the support 4 is provided with insulation.

In one embodiment, the supporting member 4 is provided with an insulating portion made of an insulating material, and the supporting member 4 plays a role in isolating the bottom plate 1 and the loading plate 2, so that a good insulating effect is ensured, the situation that a short circuit occurs between the bottom plate 1 and the loading plate 2 due to electrical connection when external impact force is applied is avoided, and safety and reliability are improved.

In one embodiment, the supporting member 4 is provided with a buffering portion made of a buffering material, the buffering portion is specifically a PC strip or the like, and when the supporting member is bumped or impacted, the buffering portion provides a certain buffering space for the bottom plate 1 and the bearing plate 2, so that the situation that the bottom plate 1 and the bearing plate 2 are damaged due to rigid collision is avoided.

In one embodiment, as shown in FIGS. 1 and 4, the height of the support 4 is H and the height of the protrusion 11 is H along the protruding direction of the protrusion 11, wherein H ≧ H. In the actual test, after the bottom plate 1 is placed on the test platform, the height of the supporting member 4 is at least higher than the height of the protrusion 11. Because support piece 4 contacts with the bottom surface of loading board 2, highly being greater than protruding 11 height at least along protruding 11 bulge directions through setting up support piece 4, be equivalent to support piece 4 with the bottom surface jack-up of loading board 2 and break away from protruding 11 for no longer direct contact between loading board 2 and the arch 11, but there is certain gap between loading board 2 and the arch 11, this gap is the thickness scope in rubber coating district 3, can provide accommodation space for the glue film in rubber coating district 3. It can be understood that, because the supporting member 4 has a certain elasticity or the thickness of the supporting member 4 itself is adjusted, the gap between the side of the protrusion 11 and the side of the bearing plate 2 close to each other can be movably adjusted, thereby adjusting the thickness of the glue layer in the glue spreading area 3.

In one embodiment, 1mm ≧ H-H ≧ 1.5 mm.

If the difference between the height H of the supporting member 4 and the height H of the protrusion 11 is less than 1mm, i.e. the gap between the protrusion 11 and the loading plate 2 is too small, it may cause interference between the protrusion 11 and the loading plate 2 when there is a bump or an external impact due to the tolerance factor of the flatness of the bottom of the base plate 1. Meanwhile, the too small gap between the protrusion 11 and the bearing plate 2 means that the maximum thickness of the glue layer in the glue coating area 3 is also very small, i.e. the thickness of the glue layer in the glue coating area 3 is very thin, which affects the bonding and fixing effects between the bearing plate 2 and the protrusion 11.

If the difference between the height H of the support member 4 and the height H of the protrusion 11 is greater than 1.5mm, i.e. the gap between the protrusion 11 and the carrier plate 2 is large, it means that the maximum thickness of the glue layer in the glue application area 3 is also large, i.e. the thickness of the glue layer in the glue application area 3 is thick, which increases the amount and weight of the glue and leads to an increase in the cost of the production raw materials.

In one embodiment, the battery box body can directly support the battery 5 on the supporting board 2, and the battery box body can further include a protective board disposed on the top surface of the supporting board 2, and the protective board directly supports the battery 5, it should be noted that the three layers of the bottom board 1, the supporting board 2 and the protective board together form a bottom board assembly. It can be understood that the battery box body further comprises a coaming, the coaming is arranged on the bottom plate assembly to form a cuboid box body structure, and the coaming is used for protecting the side face of the battery 5. The coaming can be four side plates which are connected in an end-to-end mode, can also be a frame, and can also be a cross beam, a side beam and the like, and the specific form of the coaming is not limited in this embodiment.

As shown in fig. 1 to 5, the present embodiment further provides a battery device, which includes the above battery box.

In the battery device provided by the embodiment, the bearing plate 2 is used for bearing the battery 5, the bearing plate 2 plays a role in bearing and supporting the battery 5, the bearing plate 2 is arranged on the bottom plate 1, and the bottom plate 1 plays a role in protecting the bearing plate 2. Through at least one of loading board 2 and bottom plate 1 to protruding being equipped with arch 11 to one side that is close to each other, arch 11 plays the effect that the structure is strengthened, and if backup pad or bottom plate 1's thickness ratio is thinner, utilizes arch 11 to realize the support to battery 5, remedies the panel and leads to the condition that support intensity is not enough because of thickness is thinner, improves the fastness of battery box. Simultaneously, set up in arch 11 through setting up rubber coating district 3 at least part, rubber coating district 3 is the bonding region between bottom plate 1 and loading board 2, is equivalent to both bottom plate 1 and backup pad and strengthens the department bonding in this structure of arch 11, can be more firm during the atress, is difficult for losing efficacy. Compared with the prior art that two plates with larger sizes are directly bonded, the glue coating area 3 is at least partially arranged in the protrusion 11, the bonding positions of the bottom plate 1 and the supporting plate are local positions instead of large-area positions, and the flatness of the glue coating surface is improved. In addition, the range of the glue coating area 3 is at least limited by the bulges 11, so that the thickness and the dosage of the glue layer can be regulated and controlled, and the weight and the use cost of the glue layer are reduced.

In one embodiment, the battery device further comprises a battery 5. The battery housing carrier plate 2 is used to carry a battery 5. The supporting plate 2 of the battery box body supports the battery 5, and the supporting effect of the battery 5 is guaranteed.

Among them, a battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

In one embodiment, the battery device is a battery module including a plurality of batteries 5, and the battery module may further include end plates and side plates for fixing the plurality of batteries 5.

In one embodiment, the battery device is a battery pack.

It should be noted that, when the number of the batteries 5 is plural, the plural batteries 5 may be arranged in the stacking direction of the batteries 5 to form a group of batteries 5 and then be arranged in the battery box, and the plural batteries 5 may be fixed by the end plates and the side plates. When a plurality of batteries 5 are directly provided in the battery box, i.e., without grouping the plurality of batteries 5, at this time, the end plates and the side plates may be removed.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention 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 example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery box, characterized in that includes:

the bearing plate comprises a bottom plate (1) and a bearing plate (2), wherein at least one of the bearing plate (2) and the bottom plate (1) is convexly provided with a bulge (11) towards one side close to each other;

glue spreading area (3), at least part set up in arch (11) be used for bottom plate (1) with it is fixed between loading board (2).

2. The battery box according to claim 1, further comprising a support member (4), the support member (4) being disposed between the base plate (1) and the carrier plate (2) for supporting the carrier plate (2).

3. The battery box according to claim 2, characterized in that the number of the protrusions (11) and the support member (4) is plural, and the support member (4) is disposed between two adjacent protrusions (11).

4. The battery box according to claim 2, characterized in that along the protruding direction of the protrusion (11), the height of the support (4) is H, and the height of the protrusion (11) is H, wherein H ≧ H.

5. The battery box body according to claim 4, wherein 1mm is more than or equal to H-H is more than or equal to 1.5 mm.

6. Battery box according to one of claims 2 to 5, characterised in that the support (4) is provided with a buffer and/or the support (4) is provided with an insulation.

7. The battery box according to claim 1, characterized in that the edge of the glue-coated area (3) is flush with the edge of the protrusion (11), or a gap (6) is correspondingly arranged between at least one edge of the glue-coated area (3) and at least one of the protrusions (11).

8. The battery box according to claim 1, characterized in that the protrusion (11) extends along the width direction of the bottom plate (1), or the protrusion (11) extends along the length direction of the bottom plate (1).

9. The battery box of claim 1, wherein the carrier plate is a heat exchange plate.

10. A battery device, characterized in that it comprises a battery (5) and a battery housing according to any one of claims 1-9, the carrier plate (2) of which is intended to carry the battery (5).