CN221574165U

CN221574165U - Switching structure of battery and group battery

Info

Publication number: CN221574165U
Application number: CN202323134265.4U
Authority: CN
Inventors: 姚建康; 林国罗; 洪春林; 李聪; 纪荣进; 吴声本; 陈杰; 王诗龙; 郑明清
Original assignee: Zhejiang Liwei Energy Technology Co ltd
Current assignee: Zhejiang Liwei Energy Technology Co ltd
Priority date: 2023-11-21
Filing date: 2023-11-21
Publication date: 2024-08-20
Anticipated expiration: 2033-11-21

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a switching structure of a battery, which comprises an insulating part and a conductive part, wherein the insulating part comprises a bonding area and a filling area which are connected, the bonding area is arranged on two sides of the filling area, the bonding area is provided with a groove position which is arranged corresponding to the filling area, the conductive part is arranged in the groove position of the bonding area, the conductive part comprises a first conductive part and a second conductive part, and the first conductive part and the second conductive part penetrate through the filling area along the thickness direction of the conductive part to be connected and conducted. The utility model can more flexibly, conveniently, stably and safely meet the conductive stability between adjacent batteries of the internal series battery, and effectively realize the internal series connection of the double bare cells. In addition, the utility model also provides a battery pack.

Description

Switching structure of battery and group battery

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a switching structure of a battery and a battery pack.

Background

In the assembly process of the prior internal series batteries, the difficulty of the series connection assembly of adjacent batteries is high, and in addition, how to realize the series connection between two batteries flexibly, conveniently, stably, safely and with low cost, how to ensure that the series connection position and the metal shell of the batteries can not cause contact short circuit, and the internal series connection assembly is a difficult problem in industry. For this reason, a new solution is needed to solve the above problems.

Disclosure of utility model

One of the objects of the present utility model is: aiming at the defects of the prior art, the switching structure of the battery is provided, has good safety and conductivity, and effectively ensures the stable safety of the series assembly of the battery.

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

A switching structure of a battery, comprising:

The insulation part comprises a bonding area and a filling area which are connected, the bonding area is provided with a groove, and the bonding areas are arranged on two opposite sides of the filling area;

The conductive part comprises a first conductive part and a second conductive part, the first conductive part is arranged in the groove of the bonding area at one side of the filling area, and the second conductive part is arranged in the groove of the bonding area at the other side of the filling area;

The first conductive part and the second conductive part penetrate through the filling area along the thickness direction of the conductive part to be connected and conducted.

Preferably, the filling area is an insulating interlayer connected to the bonding area, the insulating interlayer is provided with at least one fixing through hole, and at least part of the conductive part is embedded in the fixing through hole.

Preferably, the insulating interlayer extends in a direction perpendicular to the thickness direction of the conductive portion inside the transfer structure.

Preferably, the first conductive portion and the second conductive portion are both arranged in an axisymmetric structure or a rotationally symmetric structure, and the surfaces of the first conductive portion and the second conductive portion may be in a straight line shape, a cross shape, an i-shape or an X-shape.

Preferably, the first conductive portion and the second conductive portion have at least one conductive extension end extending along an X-axis direction or a Y-axis direction of the insulating portion, respectively, and an included angle between the X-axis direction and the Y-axis direction is an acute angle or a right angle.

Preferably, the length of the conductive extension end along the X-axis direction is L1, and the length of the insulating portion along the X-axis direction is L2, which satisfies the following relation: l1 is 0.5 ∈ L2 is less than or equal to 0.9.

Preferably, the length of the conductive extension end along the Y-axis direction is L3, and the length of the insulating portion along the Y-axis direction is L4, which satisfies the following relation: l1 is more than or equal to 0.6L 2 is less than or equal to 0.9.

Preferably, the bonding area is an insulating layer with a hollow structure, and the first conductive part and the second conductive part are conductive layers with solid structures.

Preferably, the Zhou Cewei of the insulating portion is provided with an insulating package frame, and the insulating package frame is used for further reinforcing the insulating portion.

Preferably, one of the insulating part and the conductive part has a convex part, the other of the insulating part and the conductive part has a concave part, and the convex part and the concave part are in concave-convex fit connection.

The second object of the present utility model is: the battery pack comprises a first battery cell, a second battery cell and the switching structure, wherein the first battery cell and the second battery cell are respectively provided with a first polarity end and a second polarity end with opposite polarities, the first polarity end of the first battery cell is connected with the first conductive part, the second polarity end of the second battery cell is connected with the second conductive part, and the bonding area separates the first battery cell from the second battery cell.

The utility model has the beneficial effects that: the utility model relates to a switching structure of a battery, which comprises an insulating part and a conductive part, wherein the insulating part comprises a bonding area and a filling area which are connected, the bonding area is provided with a groove, the bonding area is arranged on two opposite sides of the filling area, the conductive part comprises a first conductive part and a second conductive part, the first conductive part is arranged in the groove of the bonding area on one side of the filling area, the second conductive part is arranged in the groove of the bonding area on the other side of the filling area, the first conductive part and the second conductive part penetrate through the filling area along the thickness direction of the conductive part to be connected and conducted, when two electric cores are connected in series, one electric core is connected with the first conductive part, the other electric core is connected with the second conductive part, and the periphery of the insulating part is provided with the insulating bonding area, so that the insulating part can effectively avoid the occurrence of short circuit, thereby ensuring the stable and safe series assembly of the battery.

Drawings

Fig. 1 is a schematic structural view of an insulating part and a conductive part of embodiment 1 of the present utility model.

Fig. 2 is a front view of embodiment 1 of the present utility model.

Fig. 3 is a front view of embodiment 2 of the present utility model.

Fig. 4 is a front view of embodiment 3 of the present utility model.

Fig. 5 is a front view of embodiment 4 of the present utility model.

Wherein: 1. an insulating part; 11. a bonding region; 12. filling the region; 12a, fixing through holes; 2. a conductive portion; 21. a first conductive portion; 22. a second conductive portion; 23. a conductive extension;

3. An insulating package frame;

t1, the thickness direction of the conductive part; t2, X axis direction; t3, Y axis direction.

Detailed Description

As a particular component is referred to by some of the terms used in the description and claims, it should be understood by those skilled in the art that a manufacturer may refer to the same component by different terms. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect. In the present disclosure, the terms "first," "second," and the like are used merely to distinguish between different components and should not be construed as indicating or implying a relative importance.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "top," "side," "front," "rear," "left," "right," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail below with reference to fig. 1 to 5 and specific examples, but is not limited thereto.

Example 1

As shown in fig. 1 to 2, the switching structure of the battery includes:

The insulation part 1 comprises a bonding area 11 and a filling area 12 which are connected, wherein the bonding area 11 is provided with a groove, and the bonding areas 11 are arranged on two opposite sides of the filling area 12;

The conductive part 2 comprises a first conductive part 21 and a second conductive part 22, wherein the first conductive part 21 is arranged in the groove of the bonding area 11 at one side of the filling area 12, and the second conductive part 22 is arranged in the groove of the bonding area 11 at the other side of the filling area 12;

The first conductive portion 21 and the second conductive portion 22 are connected to each other through the filled region 12 in the thickness direction of the conductive portion 2.

Preferably, the filling region 12 is an insulating interlayer connected to the bonding region 11, the insulating interlayer is provided with at least one fixing through hole 12a, and at least part of the conductive portion 2 is embedded in the fixing through hole 12a.

The bonding area 11 of the insulating portion 1 may be a hollow structure with a cavity, the filling area 12 corresponds to the cavity, and the insulating interlayer and the conductive portion 2 are both accommodated in the cavity.

The insulating interlayer may be an insulating spacer provided with a plurality of through fixing holes 12a, and the fixing holes 12a may have a pore size of 1 μm to 30 μm, 30 μm to 70 μm, and 70 μm to 100 μm, and a portion of the conductive portion 2 may pass through the insulating interlayer from the fixing holes 12a, so that the first conductive portion 21 and the second conductive portion 22 of the conductive portion 2 may be conducted, on the one hand, and the connection strength of the insulating portion 1 and the conductive portion 2 may be further reinforced, on the other hand.

Preferably, the bonding area 11 is an insulating layer with a hollow structure, and the first conductive portion 21 and the second conductive portion 22 are conductive layers with solid structures.

Preferably, the material of the conductive portion 2 may be a conductive adhesive, and the conductive adhesive may be an adhesive that is resistant to electrolyte corrosion and has adhesion, such as epoxy resin, silicone resin, polyurethane, and acrylate.

Preferably, the insulating interlayer extends in the transfer structure along the thickness direction T1 perpendicular to the conductive part 2, wherein the shape of the insulating part 1 can be rectangular, circular or other geometric shapes, the shape of the insulating interlayer comprises but is not limited to a shape, a cross shape, an i-shaped shape, a king shape and an X shape, and the punching positions of the different shapes are conducted by embedding conductive adhesive, so that the internal series connection of the double cells is completed.

In some embodiments, the insulating interlayer may extend within the interposer fabric along a thickness direction T1 oblique to the conductive part 2.

Preferably, the first conductive portion 21 and the second conductive portion 22 of the conductive portion 2 are both configured to have an axisymmetric structure or a rotationally symmetric structure, and the conductive areas of the first conductive portion 21 and the second conductive portion 22 of the conductive portion 2 may be equal in area, and the conductive portion 2 may be configured with conductive channels having various shapes.

Specifically, the first conductive portion 21 and the second conductive portion 22 are both in a straight shape, the first conductive portion 21 and the second conductive portion 22 respectively have a conductive extension end 23 extending along the Y-axis direction T3 of the insulating portion 1, wherein the Y-axis direction T3 is a length direction of the insulating portion 1, the lengths of the respective conductive extension ends 23 respectively along the Y-axis direction T3 are L3, and the lengths of the insulating portion 1 along the Y-axis direction T3 are L4, so as to satisfy the following relation: l1 is more than or equal to 0.6L 2 is less than or equal to 0.9. The X-axis direction T2 is the width direction of the insulating portion 1, the X-axis direction T2 is perpendicular to the Y-axis direction T3, the length of the conductive extension end 23 along the X-axis direction T2 is L1, the length of the insulating portion 1 along the X-axis direction T2 is L2, and the relationship is satisfied: l1 is 0.5 ∈ L2 is less than or equal to 0.6.

The bonding area 11 surrounds the filling area 12, the thickness of the conductive adhesive embedded area is not larger than the thickness of the insulating part 1, the area of the front surface and the area of the back surface of the conductive adhesive are respectively smaller than the area of the main body of the battery cell, so that the conductive adhesive can be prevented from covering the edge of the main body of the battery cell, the welding space of the pack end head is increased, the energy density of the battery cell is prevented from being influenced, the bonding area 11 is ensured at the periphery of the insulating part 1, the short circuit is effectively avoided, and the stability and the safety of the series assembly of the battery are ensured.

Preferably, zhou Cewei of the insulating portion 1 is provided with an insulating packaging frame 3, and the insulating packaging frame 3 may be made of PP glue.

Example 2

Unlike embodiment 1, referring to fig. 3, the first conductive portion 21 and the second conductive portion 22 of this embodiment are cross-shaped, each of the first conductive portion 21 and the second conductive portion 22 has a conductive extension end 23 extending along the X-axis direction T2 of the insulating portion 1, each of the first conductive portion 21 and the second conductive portion 22 has a conductive extension end 23 extending along the Y-axis direction T3 of the insulating portion 1, wherein both the front and the back of the insulating portion 1 are rectangular, the angle between the X-axis direction T2 and the Y-axis direction T3 is a right angle, the X-axis direction T2 is a width direction of the rectangle, and the Y-axis direction T3 is a length direction of the rectangle.

Preferably, the length of the conductive extension 23 along the X-axis direction T2 is L1, and the length of the insulating portion 1 along the X-axis direction T2 is L2, which satisfies the relationship: l1 is 0.7 ∈ L2 is less than or equal to 0.9.

Preferably, the length of the conductive extension 23 along the Y-axis direction T3 is L3, and the length of the insulating portion 1 along the Y-axis direction T3 is L4, which satisfies the relationship: l1 is 0.7 ∈ L2 is less than or equal to 0.9.

Other structures of this embodiment are the same as those of embodiment 1, and will not be described here again.

Example 3

Unlike embodiment 1, referring to fig. 4, the first conductive portion 21 and the second conductive portion 22 of this embodiment are both i-shaped, the first conductive portion 21 and the second conductive portion 22 respectively have two parallel conductive extension ends 23 extending along the X-axis direction T2 of the insulating portion 1, the first conductive portion 21 and the second conductive portion 22 respectively have one conductive extension end 23 extending along the Y-axis direction T3 of the insulating portion 1, wherein both the front surface and the back surface of the insulating portion 1 are rectangular, the included angle between the X-axis direction T2 and the Y-axis direction T3 is a right angle, the X-axis direction T2 is a width direction of the rectangle, and the Y-axis direction T3 is a length direction of the rectangle.

Preferably, the length of the conductive extension 23 along the Y-axis direction T3 is L3, and the length of the insulating portion 1 along the Y-axis direction T3 is L4, which satisfies the relationship: l1 is more than or equal to 0.6L 2 is less than or equal to 0.8.

Example 4

Unlike embodiment 1, referring to fig. 5, the first conductive portion 21 and the second conductive portion 22 of this embodiment are each in an X shape, the first conductive portion 21 and the second conductive portion 22 each have a conductive extension 23 extending along the X-axis direction T2 of the insulating portion 1, the first conductive portion 21 and the second conductive portion 22 each have a conductive extension 23 extending along the Y-axis direction T3 of the insulating portion 1, wherein both the front and the back of the insulating portion 1 are rectangular, the angle between the X-axis direction T2 and the Y-axis direction T3 is an acute angle of 40 ° to 45 °, the X-axis direction T2 is a first diagonal direction of the rectangle, and the Y-axis direction T3 is a second diagonal direction of the rectangle.

Example 5

A battery pack comprises a first battery cell, a second battery cell and a switching structure of any one of embodiments 1-4, wherein the first battery cell and the second battery cell are respectively provided with a first polarity end and a second polarity end with opposite polarities, the first polarity end of the first battery cell is connected with a first conductive part 21, the second polarity end of the second battery cell is connected with a second conductive part 22, and a bonding area 11 of an insulating part 1 separates the first battery cell and the second battery cell.

The switching structure can be regarded as an inner series separator, can flexibly, conveniently, stably, safely and low-cost realize series connection between two batteries, and can prevent contact short circuit between the series connection position and a metal shell of the batteries.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the utility model is not limited to the specific embodiments described above, but is intended to cover any obvious modifications, substitutions or changes made by one skilled in the art on the basis of the present utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims

1. A switching structure of a battery, comprising:

The insulation part (1) comprises a bonding area (11) and a filling area (12) which are connected, wherein the bonding area (11) is provided with a groove, and the bonding areas (11) are arranged on two opposite sides of the filling area (12);

A conductive part (2) including a first conductive part (21) and a second conductive part (22), wherein the first conductive part (21) is arranged in a groove of the bonding region (11) at one side of the filling region (12), and the second conductive part (22) is arranged in a groove of the bonding region (11) at the other side of the filling region (12);

The first conductive part (21) and the second conductive part (22) penetrate through the filling area (12) along the thickness direction of the conductive part (2) to be connected and conducted.

2. The switching structure of a battery according to claim 1, wherein: the filling area (12) is an insulating interlayer connected to the bonding area (11), the insulating interlayer is provided with at least one fixing through hole (12 a), and at least part of the conductive part (2) is embedded in the fixing through hole (12 a).

3. The switching structure of a battery according to claim 2, wherein: the insulating interlayer extends in the interior of the transfer structure in a direction perpendicular to the thickness of the conductive portion (2).

4. A battery switching structure according to any one of claims 1 to 3, wherein: the first conductive part (21) and the second conductive part (22) are both arranged in an axisymmetric structure or a rotationally symmetric structure.

5. A battery switching structure according to any one of claims 1 to 3, wherein: the first conductive part (21) and the second conductive part (22) are respectively provided with at least one conductive extension end (23) extending along the X-axis direction or the Y-axis direction of the insulating part (1), and an included angle between the X-axis direction and the Y-axis direction is an acute angle or a right angle.

6. The battery switching structure according to claim 5, wherein: the length of the conductive extension end (23) along the X-axis direction is L1, the length of the insulation part (1) along the X-axis direction is L2, and the relation is satisfied: l1 is 0.5 ∈ L2 is less than or equal to 0.9.

7. The battery switching structure according to claim 5, wherein: the length of the conductive extension end (23) along the Y-axis direction is L3, the length of the insulating part (1) along the Y-axis direction is L4, and the relation is satisfied: l1 is more than or equal to 0.6L 2 is less than or equal to 0.9.

8. A battery switching structure according to any one of claims 1 to 3, wherein: the bonding area (11) is an insulating layer with a hollow structure, and the first conductive part (21) and the second conductive part (22) are conductive layers with solid structures.

9. A battery switching structure according to any one of claims 1 to 3, wherein: zhou Cewei of the insulating part (1) is provided with an insulating packaging frame (3).

10. A battery pack, characterized in that: the switching structure comprises a first electric core, a second electric core and the switching structure according to any one of claims 1-9, wherein the first electric core and the second electric core are provided with a first polarity end and a second polarity end with opposite polarities, the first polarity end of the first electric core is connected with the first conductive part (21), the second polarity end of the second electric core is connected with the second conductive part (22), and the bonding area (11) separates the first electric core from the second electric core.