CN219180224U

CN219180224U - Electric connection row and battery pack

Info

Publication number: CN219180224U
Application number: CN202223060932.4U
Authority: CN
Inventors: 左国坤; 鄂从吉; 方成; 郑铿庭
Original assignee: Wuwei Fudi Battery Co ltd; BYD Co Ltd
Current assignee: Wuwei Fudi Battery Co ltd; BYD Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-06-13
Anticipated expiration: 2032-11-16

Abstract

The present disclosure relates to an electrical connection bank and a battery pack, the electrical connection bank including a conductor layer, a high temperature resistant layer, and a nylon insulating layer; the high temperature resistant layer is arranged on the outer surface of the conductor layer, and the nylon insulating layer is arranged on the outer surface of the high temperature resistant layer. Through above-mentioned technical scheme, the electric connection row of this disclosure promptly through locating high temperature resistant layer and the nylon insulating layer of conductor layer surface in proper order, can satisfy high temperature resistant protection and normal atmospheric temperature high temperature insulation demand, simultaneously, the nylon insulating layer adopts nylon material to make, can satisfy high-quality environmental protection requirement, and its wear-resisting, anticorrosive, temperature resistant, toughness, arc resistance can be good, avoids insulating layer unable to satisfy insulation in the correlation technique to keep away dangerous function.

Description

Electric connection row and battery pack

Technical Field

The present disclosure relates to the field of battery technology, and in particular, to an electrical connection bank and a battery pack.

Background

The electric connection bar for connecting the battery module generally comprises a conductive core body, a high-temperature-resistant layer wrapped on the outer surface of the conductive core body and an insulating layer wrapped on the outer surface of the high-temperature-resistant layer, wherein the high-temperature-resistant layer is used for fire resistance and flame retardance, thermal runaway or thermal diffusion of the electric connection bar is avoided, and the insulating layer is used for water resistance and insulation. In the related art, the insulating layer adopts polyvinyl chloride (PVC), the material of the insulating layer contains more chlorine elements, the high-quality environment-friendly requirement cannot be met, and meanwhile, the insulating layer is poor in wear resistance, corrosion resistance, temperature resistance, toughness and arc resistance, and the insulating danger avoiding function of the electric connection row cannot be met.

Disclosure of Invention

The purpose of this disclosure is to provide an electric connection row and battery package, and this electric connection row adopts the nylon insulating layer, can satisfy high-quality environmental protection requirement, and its performance is good to at least partially solve relevant technical problem.

To achieve the above object, a first aspect of the present disclosure provides an electrical connection bar including a conductor layer, a high temperature resistant layer, and a nylon insulation layer;

the high temperature resistant layer is arranged on the outer surface of the conductor layer, and the nylon insulating layer is arranged on the outer surface of the high temperature resistant layer.

Optionally, the high temperature resistant layer is constructed as a mica tape, PI material, fiberglass cloth or ceramic tape.

Optionally, the high temperature resistant layer is configured as a glass fiber layer, a mica layer and a film layer which are stacked in sequence;

the glass fiber layer is arranged on the outer surface of the conductor layer, and the nylon insulating layer is arranged on the outer surface of the film layer.

Optionally, the high temperature resistant layer (200) is configured as a mica tape with a width of 10-20mm and a thickness of 0.1-0.15mm, and the thickness of the winding lamination layer is greater than or equal to 0.45mm;

or the high-temperature resistant layer (200) is a synthetic mica tape with the width of 10-20mm and the thickness of 0.1-0.15mm, and the thickness of the winding lamination layer is more than or equal to 0.3mm;

or, the high temperature resistant layer (200) is constructed as a ceramic tape with a width of 10-20mm and a thickness of 0.2mm or more, and the winding lamination rate is 25% or more.

Optionally, the conductor layer is made of conductive metal.

Optionally, the conductor layer is made of aluminum, copper or silver.

Optionally, the cross section of the conductor layer is rectangular, and a rounded corner transition part is arranged between two adjacent edges.

Optionally, the fillet radius of the fillet transition is 0.5mm or greater.

Optionally, both ends of the electrical connection row are respectively exposed out of the conductor layer, and the exposed conductor layer forms a connection part for connection with the battery module.

In a second aspect of the present disclosure, there is also provided a battery pack including the above-described electrical connection rows.

Through above-mentioned technical scheme, the electric connection row of this disclosure promptly through locating high temperature resistant layer and the nylon insulating layer of conductor layer surface in proper order, can satisfy high temperature resistant protection and normal atmospheric temperature high temperature insulation demand, simultaneously, the nylon insulating layer adopts nylon material to make, can satisfy high-quality environmental protection requirement, and its wear-resisting, anticorrosive, temperature resistant, toughness, arc resistance can be good, avoids insulating layer unable to satisfy insulation in the correlation technique to keep away dangerous function.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic cross-sectional view of an electrical connection row provided by some embodiments of the present disclosure;

FIG. 2 is a schematic cross-sectional view of an electrical connection row provided by other embodiments of the present disclosure;

fig. 3 is an enlarged view of a portion a based on fig. 2;

fig. 4 is a block diagram of an electrical connection bank provided by some embodiments of the present disclosure.

Description of the reference numerals

100-conductor layer; 101-a connection; 110-rounded transitions; 200-a high temperature resistant layer; 210-mica tape; 220-glass fiber layer; 230-a mica layer; 240-a thin film layer; 300-nylon insulating layer.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, directional terms such as "inner and outer" are used to refer to both inner and outer of the respective component profiles; "distal" and "proximal" refer to a respective structure or component that is distal to or proximal to another structure or component. In addition, the terms "first," "second," and the like, as used in this disclosure, are used to distinguish one element from another element without sequence or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure.

As shown in fig. 1 to 4, in order to achieve the above object, a first aspect of the present disclosure provides an electrical connection row including a conductor layer 100, a high temperature resistant layer 200, and a nylon insulation layer 300; the high temperature resistant layer 200 is arranged on the outer surface of the conductor layer 100, the nylon insulating layer 300 is arranged on the outer surface of the high temperature resistant layer 200, and the nylon insulating layer 300 is made of nylon materials.

Through above-mentioned technical scheme, the electric connection row of this disclosure promptly through locating high temperature resistant layer 200 and nylon insulating layer 300 of conductor layer 100 surface in proper order, can satisfy high temperature resistant protection and normal atmospheric temperature high temperature insulation demand, simultaneously, nylon insulating layer 300 adopts the nylon material, can satisfy high-quality environmental protection requirement, and its wear-resisting, anticorrosive, temperature resistant, toughness, arc resistance can be good, avoid among the correlation technique insulating layer unable to satisfy insulation and keep away dangerous function.

It should be noted that, the nylon insulating layer 300 may be PA11, also called nylon 11, and the PA11 has the characteristics of light weight, corrosion resistance, difficult fatigue and cracking, good sealing performance, small resistance, etc.; the PA11 has good arc resistance and electrolytic corrosion resistance, and can be used as a wire and cable protective sleeve to improve the reliability of the cable and prolong the service life.

Nylon insulator 300 may also be PA12, also known as nylon 12, which has similar characteristics to PA11 but a different crystal structure. PA12 is a good electrical insulator and, like other polyamides, does not affect the insulating properties by moisture. It has excellent impact resistance and mechanical and chemical stability. PA12 has many improved varieties in terms of plasticizing and reinforcing properties. These materials have lower melting points and densities than PA6 and PA66, with very high moisture regains. PA12 is not resistant to strong oxidizing acids. The viscosity of PA12 is primarily dependent on humidity, temperature and shelf life. It has good fluidity. Shrinkage is between 0.5% and 2%, depending mainly on the material type, wall thickness and other process conditions.

The nylon insulating layer 300 can also be insulating paint, epoxy resin, rubber and the like which can play a role in insulating protection at the temperature of below 150 ℃ and is corrosion-resistant, wear-resistant and waterproof.

The conductor layer 100 may be made of any suitable conductive material, wherein in some embodiments, the conductor layer 100 may be a conductive metal material.

In some embodiments, the conductor layer 100 is aluminum, copper, or silver. The conductor layer 100 may be made of 1066 aluminum, but other types of aluminum may be used, and the present utility model is not limited thereto.

The cross-section of the conductor layer 100 may be of any suitable shape, for example square or circular. In some embodiments, as shown in fig. 1, the conductor layer 100 is rectangular in cross-section, and rounded transitions 110 are provided between adjacent edges. Wherein, the two adjacent edges of the conductor layer 100 are transited by adopting the rounded transition portion 110, so that the high temperature resistant layer 200 arranged on the outer surface of the conductor layer 100 can be better attached to the outer surface of the conductor layer 100, and meanwhile, the high temperature resistant layer 200 is prevented from being scratched by the corner between the two adjacent edges in the winding process, thereby affecting the high temperature resistance of the electrical connection row.

For a rectangular cross-section conductor layer 100, the specific dimensions of the rounded transition 110 may be reasonably selected according to the specific dimensions of the conductor layer 100, and in some embodiments, the rounded radius of the rounded transition 110 is 0.5mm or greater. When the fillet radius is too small, the purpose of protecting the high temperature resistant layer 200 cannot be achieved, and therefore, the fillet radius R of the fillet transition 110 is further defined to be equal to or larger than 0.5mm, and a person skilled in the art can further optimize the fillet radius on the premise of meeting the requirement of protecting the high temperature resistant layer 200.

The refractory layer 200 may be constructed in any suitable manner, as shown in fig. 2 and 3, and in some embodiments of the present disclosure, the refractory layer 200 is constructed as a mica tape 210, PI material, fiberglass cloth, or ceramic tape.

The high temperature resistant layer 200 may be a mica tape 210, including but not limited to a mica single material, or may be other insulating materials satisfying 150-1000 ℃, for example, PI (Polyimide, abbreviated as PI), glass fiber cloth, or ceramic tape.

As shown in fig. 3, in other embodiments, the high temperature resistant layer 200 may employ a laminated structure layer, for example, the high temperature resistant layer 200 is configured of a glass fiber layer 220, a mica layer 230, and a film layer 240 stacked in this order; the glass fiber layer 220 is disposed on the outer surface of the conductor layer 100, and the nylon insulating layer 300 is disposed on the outer surface of the film layer 240. Wherein, the glass fiber layer 220 is surrounded on the outer surface of the conductor layer 100, the mica layer 230 is surrounded on the outer surface of the glass fiber layer 220, the film layer 240 is surrounded on the outer surface of the mica layer 230, and the nylon insulating layer 300 made of nylon material is surrounded on the outer surface of the film layer 240. The laminated structure composed of the glass fiber layer 220, the mica layer 230 and the film layer 240 can ensure that the insulating layer has certain insulating performance and does not fire at the temperature of more than 150-1000 ℃, while the nylon insulating layer 300 made of nylon material can have insulating, waterproof and corrosion-resistant properties at normal temperature so as to meet the use requirements, for example, avoid the integral insulation failure of the electric connection row caused by possible abrasion of a vehicle in running/vibrating.

The film layer 240 may be polyester resin, PE (polyethylene), PI (polyimide), or the like.

The glass fiber layer 220 may be glass fiber cloth, and the mica layer 230 may be phlogopite or muscovite, which may be selected according to the actual temperature resistance level, and will not be described herein.

In some embodiments, the thickness of the high temperature resistant layer 200 may be 0.1-0.15mm, and the thickness of the mica layer 230 is 0.045mm or more. For example, the thickness of the high temperature resistant layer 200 may be 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, or 0.15mm, and may be selected within the above range according to implementation requirements. In order to secure high temperature insulation performance, the thickness of the mica layer 230 may be 0.045mm or more.

In some embodiments, the high temperature resistant layer 200 may be constructed as a sheet of a gold mica tape having a width of 10-20mm and a thickness of 0.1-0.15mm, and the wound stack thickness is 0.45mm or greater; alternatively, the high temperature resistant layer 200 may be formed as a synthetic mica tape having a width of 10-20mm and a thickness of 0.1-0.15mm, and the thickness of the wound laminate is 0.3mm or more; alternatively, the high temperature resistant layer 200 may be configured as a ceramic tape having a width of 10 to 20mm and a thickness of 0.2mm or more, and a winding lamination rate of 25% or more, for example, an average thickness of (1+0.25) ×0.2 mm=0.25 mm when the winding lamination rate is 25%. The performance can ensure that the electric connection row still has insulation and voltage resistance when exposed fire (the temperature is more than or equal to 750 ℃); the high-temperature resistant insulating layer can meet the requirements of the subsequent forming process by enhancing the tensile strength of the body and sampling the laminated structure.

It should be noted that, the gilt mica tape or the synthetic mica tape is provided in the circumferential direction of the conductor layer 100 in a winding manner, that is, the gilt mica tape or the synthetic mica tape is wound in the width direction of the conductor layer 100 and wraps the conductor layer 100 in a lamination manner along the length direction thereof, thus, the winding lamination thickness refers to the overall winding thickness of the gold mica tape or the synthetic mica tape, for example, the thickness of the gold mica tape is 0.15mm, and 3 layers are wound in the thickness direction, and the winding lamination thickness of the gold mica tape is 0.45mm. The winding lamination rate refers to the ratio of the overlap length of the upper layer adhesive tape and the lower layer adhesive tape in the width direction to the width of the adhesive tape.

The size and shape of the electric connection row in the length direction are not particularly limited, and can be designed or bent according to the implementation conditions. As shown in fig. 4, in some embodiments, both ends of the electrical connection rows are exposed to the conductor layers 100, respectively, and the exposed conductor layers 100 form connection parts 101 for connection with the battery module. The connection part 101 may be constructed in a mounting hole formed at the exposed conductor layer 100 to facilitate connection with the electrode post of the battery module. Of course, the connection portion 101 may have other structures or shapes, and the present disclosure is not limited thereto.

The above processing of the nylon insulating layer 300 is performed in a straight state of the metallic conductor layer 100, and the automatic winding adopted by the high temperature resistant layer 200 is followed by extrusion of the nylon material in a state of winding the aluminum strip of the coated mica tape 210, and the finished semi-finished product can be collected as a coil for storage/transportation. The nylon insulating layer 300 of the present disclosure is made of nylon material, and improves the overall wear resistance, corrosion resistance, temperature resistance, toughness and arc resistance of the electrical connection rows.

According to the scheme, the high-temperature resistant layer 200 and the nylon insulating layer 300 are sequentially wrapped outside the conductor layer 100 to meet practical application requirements, insulating protection functions can be well provided by the aid of the nylon material at the outermost layer in a normal temperature state, meanwhile, inner-layer mica paper can be well protected in the use process, and even the process of wrapping the mica paper can be prevented from being placed before forming processing (flat bending/vertical bending) of a product, and the process of wrapping the mica tape 210 is placed before forming processing, so that the mica wrapping insulating processing production rate is greatly improved.

In a second aspect of the present disclosure, a battery pack is provided, where the battery pack includes the above-mentioned electrical connection rows, and therefore, the battery pack also has all the advantages of the above-mentioned electrical connection rows, which are not described herein again.

The battery pack can comprise one or more battery modules, and the electric connection row is used for connecting the battery modules with other electricity utilization or charging structures and can also be used for connecting two battery modules.

To sum up, the high temperature resistant layer 200 and the nylon insulating layer 300 which are sequentially arranged on the outer surface of the conductor layer 100 can meet the high temperature resistant protection and normal temperature and high temperature insulation requirements, meanwhile, the nylon insulating layer 300 is made of nylon materials, the high-quality environment protection requirements can be met, and the nylon materials are adopted, so that the existing polyethylene insulating layer can be used for making up the requirements of wear resistance, corrosion resistance, temperature resistance, toughness and arc resistance, and the insulating layer can not meet the insulation risk avoidance function.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. An electrical connection row, characterized in that it comprises a conductor layer (100), a high temperature resistant layer (200) and a nylon insulation layer (300);

the high-temperature resistant layer (200) is arranged on the outer surface of the conductor layer (100), and the nylon insulating layer (300) is arranged on the outer surface of the high-temperature resistant layer (200).

2. The electrical connection row according to claim 1, characterized in that the high temperature resistant layer (200) is constructed as a mica tape (210), PI material, fiberglass cloth or ceramic tape.

3. The electrical connection row according to claim 1, characterized in that the high temperature resistant layer (200) is configured as a glass fiber layer (220), a mica layer (230) and a film layer (240) stacked in sequence;

the glass fiber layer (220) is arranged on the outer surface of the conductor layer (100), and the nylon insulating layer (300) is arranged on the outer surface of the film layer (240).

4. The electrical connection row according to claim 2, characterized in that the high temperature resistant layer (200) is configured as a sheet of a gold mica tape having a width of 10-20mm and a thickness of 0.1-0.15mm, and the thickness of the wound laminate is 0.45mm or more;

5. The electrical connection row according to any of claims 1-4, wherein the conductor layer (100) is of an electrically conductive metal material.

6. The electrical connection row according to claim 5, characterized in that the conductor layer (100) is of aluminum, copper or silver material.

7. The electrical connection row according to any of claims 1-4, characterized in that the conductor layer (100) is rectangular in cross section and that rounded transitions (110) are provided between adjacent edges.

8. The electrical connection row according to claim 7, characterized in that the fillet radius of the fillet transition (110) is equal to or greater than 0.5mm.

9. The electrical connection row according to claim 1, wherein both ends of the electrical connection row are exposed to the conductor layers (100), respectively, and the exposed conductor layers (100) form connection parts (101) for connection with a battery module.

10. A battery pack comprising an electrical connection bank according to any one of claims 1-9.