CN217306604U

CN217306604U - Battery device

Info

Publication number: CN217306604U
Application number: CN202221201927.8U
Authority: CN
Inventors: 郑立成; 李炜; 肖康; 朱肃然
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 device, and battery device includes: a battery provided with a flange; a conductive member electrically connected to the battery; and an insulating member disposed between the flange and the conductive member for insulating the conductive member from the flange. A large amount of heat can be generated in the using process of the battery device, and the battery is provided with the flange, so that the heat can be dissipated to the outside of the battery through the flange, and the purpose of dissipating the heat of the battery is achieved. If the distance between the conductive piece and the flange is relatively short, the electric gap is relatively small, when bumping or being impacted by the outside, the conductive piece is easy to contact with the flange to cause short circuit, the insulating piece is arranged between the flange and the conductive piece, the insulating piece plays a role in isolating the flange from the conductive piece, the insulation between the conductive piece and the flange is realized, the condition of short circuit is avoided, and the safety and the reliability of the battery device in the using process are ensured.

Description

Battery device

Technical Field

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

Background

In the related art, when batteries of a battery device are grouped, generally, a conductive device is needed to connect terminals of the batteries, and if the distance between the conductive device and the batteries is relatively small, the conductive device and the batteries are likely to be in contact to cause short circuit, thereby affecting the safety and reliability of the battery device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery device, it is insulating effectual to improve battery device's reliable performance.

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

a battery provided with a flange;

a conductive member electrically connected to the battery;

and the insulating part is arranged between the flange and the conductive part and is used for insulating the conductive part from the flange.

The embodiment of the utility model provides a battery device can produce a large amount of heats in battery device's use, through being provided with the flange at the battery, the outer wall setting of flange protrusion battery, and the heat can be through flange heat dissipation to the battery outside to reach the radiating purpose of battery. The battery is electrically connected with the conductive piece through the conductive piece, so that the electrical connection between the battery and the conductive piece is realized, and a current signal of the battery is transmitted out. If the distance between the conductive piece and the flange is relatively short, the electric gap is relatively small, when bumping or being impacted by the outside, the conductive piece is easy to contact with the flange to cause short circuit, the insulating piece is arranged between the flange and the conductive piece, the insulating piece plays a role in isolating the flange from the conductive piece, the insulation between the conductive piece and the flange is realized, the condition of short circuit is avoided, and the safety and the reliability of the battery device in the using process are ensured.

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 so as 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 schematic diagram illustrating the structure of a battery device according to an exemplary embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic diagram of a second configuration of a battery device according to an exemplary embodiment;

fig. 4 is a partial enlarged view of fig. 3 at B.

The reference numerals are explained below:

1. a battery; 2. a conductive member; 3. an insulating member;

11. a flange; 12. a pole column;

21. a projection; 22. a connecting portion;

31. a covering section; 32. a fixed part.

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 otherwise explicitly specified or limited, the terms "first", "second", and "first" 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 device, please refer to fig. 1 to 4, the battery device includes battery 1, conductive piece 2 and insulating part 3, battery 1 is provided with flange 11, conductive piece 2 electricity is connected in battery 1, insulating part 3 sets up between flange 11 and conductive piece 2 for the insulation between conductive piece 2 and the flange 11.

The utility model discloses a battery device of an embodiment can produce a large amount of heats in battery device's use, through being provided with flange 11 at battery 1, flange 11 protrudes battery 1's outer wall setting, and the heat can dispel the heat to battery 1 outside through flange 11 to reach the radiating purpose of battery 1. The battery 1 is electrically connected with the conductive member 2 through the battery 1, so that the battery 1 and the conductive member 2 are electrically connected to transmit a current signal of the battery 1. If the distance between the conductive piece 2 and the flange 11 is relatively short, the electric gap is relatively small, when bumping or being impacted by the outside, the conductive piece 2 is easy to contact with the flange 11 to cause short circuit, the insulating piece 3 is arranged between the flange 11 and the conductive piece 2, and the insulating piece 3 plays a role in isolating the flange 11 from the conductive piece 2, so that the insulation between the conductive piece 2 and the flange 11 is realized, the short circuit is avoided, and the safety and the reliability of the battery device in the use process are ensured.

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 battery 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 1, and the battery module may further include end plates and side plates for fixing the plurality of batteries 1.

In one embodiment, the battery device may be a battery pack, and the battery device further includes a battery box, and the battery 1 is disposed in the battery box. By providing the battery 1 in the battery box, the battery box realizes protection of the battery 1.

When the number of the batteries 1 is plural, the plural batteries 1 may be arranged in the stacking direction of the batteries 1 to form a battery pack and then in the battery box, and the plural batteries 1 may be fixed by the end plates and the side plates. When a plurality of cells 1 are arranged in the stacking direction of the cells 1 to form a battery pack, and are directly arranged in the battery box, it is also not necessary to group the plurality of cells 1, and at this time, the end plates and the side plates can be removed.

In one embodiment, the battery 1 is embodied as a prismatic battery 1, and a battery assembly formed by stacking a plurality of batteries 1 in the stacking direction is similarly of a rectangular parallelepiped structure. The stacking direction of the battery 1 is the width direction of the battery 1, and is defined as the stacking direction of the battery 1 being the X direction, the width direction of the battery 1 being the Y direction, the height direction of the battery 1 being the Z direction, and the length direction of the battery 1, the height direction of the battery 1 and the stacking direction of the battery 1 being mutually perpendicular in pairs, where these three directions only represent spatial directions, and there is no substantial meaning in terms of convenience of position description.

In one embodiment, as shown in fig. 1-2, the flange 11 is an annular structure disposed along the edge of the battery 1 and around the battery 1, the flange 11 may also be referred to as a flange, the flange 11 performs a function of dissipating heat in the circumferential direction of the battery 1, the heat dissipation effect is good, and the flange 11 is used to facilitate welding between two adjacent batteries 11. Wherein, the number of the flanges 11 is not limited for each single battery 1, two flanges 11 are respectively arranged along the stacking direction of the batteries 1, namely, at two sides of the width direction of the batteries 1, and the flanges 11 of two adjacent batteries 1 are butted and attached to each other, so as to intensively discharge the heat of the two adjacent batteries 1, and realize the function of radiating the heat of the end part of the single battery 1. A flange 11 can be arranged at the middle position of the battery 1 to realize the function of radiating the middle part of the single battery 1.

In one embodiment, as shown in fig. 2, a terminal post 12 is disposed on a side of the battery 1 close to the flange 11, the terminal post 12 is extended along a height direction of the battery 1, and the battery 1 is electrically connected to the conductive member 2 through the terminal post 12. Since the heat at the position of the post 12 of the battery 1 is relatively large in the battery device, the post 12 is disposed on one side of the battery 1 close to the flange 11, so that the distance between the post 12 and the flange 11 is relatively small, and the flange 11 plays a role in assisting the heat dissipation of the post 12 of the battery 1.

In one embodiment, a plurality of batteries 1 are stacked to form a battery assembly, and the poles 12 of two adjacent batteries 1 are electrically connected through the conductive member 2. The conductive member 2 is specifically a bus bar, a conductive bar, or a bus bar, and realizes electrical connection between two adjacent batteries 1.

It is understood that the stacking direction of the plurality of cells 1 is the width direction of the cells 1, and the height direction of the cells 1, the length direction of the cells 1, and the width direction of the cells 1 are perpendicular to each other two by two. If the post 12 is disposed on the top surface of the battery assembly in the height direction of the battery 1, the plurality of conductive members 2 are also disposed on the top surface of the battery assembly; if the terminal post 12 is disposed on the side surface of the battery assembly in the stacking direction of the battery 1, a plurality of conductive members 2 are also disposed on the side surface of the battery assembly. The side face is specifically a side face of the battery module parallel to the stacking direction of the battery 1, and is a side face in which the height direction of the battery 1 and the stacking direction of the battery 1 are located. For each battery 1, two terminals 12 are disposed on both sides of the battery 1 along the length direction of the battery 1, and the terminals 12 are specifically positive and negative terminals, that is, a plurality of conductive members 2 are disposed on both sides of the battery assembly along the length direction of the battery 1, that is, perpendicular to the stacking direction of the plurality of batteries 1.

In one embodiment, as shown in fig. 1-2, the cross-section of the conductive member 2 resembles a zigzag structure along the stacking direction of the batteries 1. Specifically, the conductive member 2 includes a protruding portion 21 and two connecting portions 22, and along the stacking direction of the batteries 1, the two connecting portions 22 are respectively disposed at two sides of the protruding portion 21, and the two connecting portions 22 are respectively and correspondingly connected to the poles 12 of the two adjacent batteries 1 through connecting members, wherein the connecting members may be bolts, screws, connecting pins, and the like. The protruding part 21 is connected to the connecting part 22 and protrudes away from the battery 1, and the protruding part 21 forms a cavity for effectively avoiding the flange 11 of the battery 1. It can be understood that the connecting portion 22 and the protruding portion 21 are integrally formed, for example, the connecting portion 22 and the protruding portion 21 are formed by a bending process of the section bar, so that links of component assembly are reduced, and the production cost is relatively low.

In one embodiment, the flange 11 arranged opposite to the conductive member 2 is a bearing flange provided with an insulating member 3; and/or the flange 11 having a minimum clearance from the conductive member 2 smaller than a predetermined distance is a bearing flange provided with the insulating member 3.

Through setting up and just being the bearing flange with electrically conductive piece 2 flange 11 of setting up, this bearing flange probably partly stretches into electrically conductive piece 2's bulge 21, bear the flange part promptly and stretch into the die cavity of bulge 21, under the condition that receives the great impact force in the external world, the condition that probably appears mutual contact between the inner wall of bearing flange and die cavity, through be provided with insulating part 3 on this bearing flange, insulating part 3 realizes effectively insulating between the die cavity inner wall of bearing flange and electrically conductive piece 2, avoid bearing flange and electrically conductive piece 2 the condition that direct contact appears, guarantee insulating effect.

The flange 11, which has a minimum gap from the conductive member 2 smaller than a predetermined distance, is a load-bearing flange, wherein the predetermined distance is a safe distance between the conductive member 2 and the flange 11 in case of an external impact force. When bearing the minimum clearance between flange and the electrically conductive piece 2 and being less than preset distance, mean that bearing the flange and the electrically conductive piece 2 between the clearance is smaller, both have mutual contact and appear the risk of short circuit, through being provided with insulating part 3 on this bearing the flange, insulating part 3 realizes bearing the effective insulation between flange and the electrically conductive piece 2, avoids bearing the flange and electrically conductive piece 2 the condition that direct contact appears, guarantees insulating effect.

Because the number and the position of the flanges 11 are not fixed, the electric clearance between each flange 11 and the conductive piece 2 is not smaller, the flanges are represented by two parameters which are arranged just opposite to the conductive piece 2 and the minimum clearance between the flanges and the conductive piece 2, and the flanges 11 in key areas are only subjected to insulation treatment, so that the insulation effect of the flanges 11 and the conductive pieces 2 is ensured, the insulation pieces 3 are prevented from being arranged on all the flanges 11, and the original cost of materials is saved.

In one embodiment, the insulating member 3 is made of an insulating film material, the insulating film has the advantage of light weight, which satisfies the requirement of light weight of the battery device, and the insulating film has good insulating property, which ensures the insulating effect between the bearing flange and the conductive member 2.

It is understood that, in other embodiments, the insulating member 3 may be formed by coating an insulating layer on the cover film.

In one embodiment, the insulator 3 at least partially wraps around the load flange. Bear the flange and provide the mounted position for insulating part 3, simultaneously, insulating part 3 realizes at least parcel effect to bearing the flange, realizes bearing effectively keeping apart between flange and the electrically conductive piece 2, avoids bearing the risk of direct contact between flange and the electrically conductive piece 2.

In particular, as shown in fig. 2, the insulating element 3 comprises a covering portion 31 and a fixing portion 32, the covering portion 31 partially covering the surface of the carrying flange, wherein the surface of the carrying flange is in particular the top surface and the two side surfaces of the carrying flange, and the covering portion 31 achieves covering and isolation of the outer wall of the carrying flange, reducing the risk of contact with the conductive element 2. The fixing portion 32 is connected to the covering portion 31, the fixing portion 32 is disposed on the outer wall of the battery 1, the fixing portion 32 is equivalent to the extension end of the covering portion 31, and the fixing portion 32 is disposed on the outer wall of the battery 1 to ensure the fixing effect of the insulating member 3.

It should be noted that a groove is formed between the bearing flange and the flange 11 without the pole 12, the fixing portion 32 is disposed in the groove, and the groove realizes a limiting effect on the fixing portion 32. Wherein the groove width of the groove is approximately equal to the width of the fixing portion 32 in the stacking direction of the batteries 1.

In one embodiment, the overlay 31 is bonded to the carrier flange; and/or, the fixing portion 32 is bonded to the battery 1. The fixing effect between the covering part 31 and the bearing insulation is ensured by arranging the covering part 31 to be adhered to the bearing flange; by providing the fixing portion 32 to be bonded to the battery 1, the fixing effect between the fixing portion 32 and the battery 1 is ensured. In addition, the adhesive connection is adopted, so that the process is simple and the use is convenient.

In one embodiment, as shown in fig. 3-4, the insulating member 3 and the conductive member 2 are disposed in facing relation. In other words, since the flange 11 is an annular structure that is disposed along the edge of the battery 1 and surrounds the battery 1, if the annular structure is completely wrapped with the insulating member 3, although the insulating effect can be ensured to the maximum extent, there is also a waste situation, and therefore, the insulating member 3 is wrapped only on the flange 11 that is located just opposite to the conductive member 2, so that the electrical gap between the flange 11 and the conductive member 2 is increased, the amount of the insulating member 3 used can be reduced as much as possible, and the dual functions of both the insulating performance and the production cost can be ensured.

In one embodiment, as shown in fig. 4, the length of the insulating member 3 in the height direction of the battery 1 is L, and the length of the conductive member 2 in the height direction of the battery 1 is L, where L > L. In other words, the length of the insulating member 3 along the height direction of the battery 1 is at least greater than the length of the conductive member 2, i.e. the edge of the insulating member 3 along the height direction of the battery 1 exceeds the edge of the conductive member 2 along the height direction of the battery 1, so as to ensure the effectiveness of the insulating member 3 in isolating and insulating the conductive member 2.

In one embodiment, 20mm L-L is 40 mm. In other words, the top surface of the insulating member 3 is higher than the top surface of the conductive member 2 in the height direction of the battery 1, and the distance difference between the top surface of the insulating member 3 and the top surface of the conductive member 2 is Δ L, which is about 10mm to 20 mm; the bottom surface of the insulating member 3 is lower than the top surface of the conductive member 2 in the height direction of the battery 1, and the difference in distance between the bottom surface of the insulating member 3 and the bottom surface of the conductive member 2 is Δ L, which is about 10mm to 20 mm. In this way, the single side of the insulating part 3 at least exceeds the conductive part by 10 mm-20 mm, so that the insulating effect between the conductive part 2 and the flange 11 can be ensured while avoiding the waste of materials of the insulating part 3 as much as possible.

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 device, comprising:

a battery (1), the battery (1) being provided with a flange (11);

a conductive member (2) electrically connected to the battery (1);

an insulating member (3) provided between the flange (11) and the conductive member (2) for insulating between the conductive member (2) and the flange (11).

2. The battery device according to claim 1, wherein the flange (11) disposed opposite to the conductive member (2) is a bearing flange provided with the insulating member (3); and/or the presence of a gas in the gas,

the flange (11) with the minimum clearance between the flange and the conductive piece (2) being smaller than the preset distance is a bearing flange provided with the insulating piece (3).

3. A battery device according to claim 2, characterized in that the insulating member (3) at least partly surrounds the carrying flange.

4. A battery device according to claim 3, characterized in that the insulating member (3) comprises:

a covering part (31) partially covering the surface of the bearing flange;

a fixing portion (32) connected to the covering portion (31), the fixing portion (32) being provided on an outer wall of the battery (1).

5. A battery device according to claim 4, characterized in that the cover (31) is glued to the carrier flange;

and/or the fixing part (32) is bonded to the battery (1).

6. The battery device according to claim 1, wherein the insulating member (3) and the conductive member (2) are disposed to face each other.

7. The battery device according to any one of claims 1 to 6, wherein the length of the insulating member (3) in the height direction of the battery (1) is L, and the length of the conductive member (2) in the height direction of the battery (1) is L, wherein L > L.

8. The battery device according to claim 7, wherein 20mm L-L is 40 mm.

9. A battery device according to any of claims 1-6, characterized in that the battery (1) is provided with a pole (12) on the side close to the flange (11), and the battery (1) is electrically connected to the electrically conductive member (2) via the pole (12).

10. The battery device according to any one of claims 1 to 6, wherein the number of the battery (1) is plural, a plurality of the batteries (1) are stacked to form a battery assembly, and two adjacent batteries (1) are electrically connected through the conductive member (2); and the conductive pieces (2) are respectively arranged on two sides of the battery component along the length direction of the battery (1).