CN214013108U

CN214013108U - Electric connection busbar structure and battery pack

Info

Publication number: CN214013108U
Application number: CN202023225485.4U
Authority: CN
Inventors: 段有明; 高升; 李鸣
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-20
Anticipated expiration: 2030-12-28

Abstract

The utility model provides an electric connection is female to be arranged structure and battery package, the utility model provides an electric connection is female to be arranged the structure including female the arranging body to parcel has the fire prevention mud layer and ties the fire prevention mud layer of parcel on female the arranging body constraint layer on partial length's female the arranging body. The utility model discloses an electric connection is female to be arranged the structure, provides an electric connection female fire prevention of arranging and insulating technical scheme, and the technique of being convenient for is implemented.

Description

Electric connection busbar structure and battery pack

Technical Field

The utility model relates to a power battery technical field, in particular to female structure of arranging is connected to electricity. The utility model discloses still relate to a battery package.

Background

With the rapid increase of the number of automobiles in China, the traditional fuel oil vehicle becomes one of the important sources of environmental pollution in China, and the electric automobile becomes an important development direction of new energy automobiles due to the characteristics of energy conservation and environmental protection. The battery module is used as a core component of the electric automobile, and the safety and the reliability of the battery module directly determine the safety performance and the cost of the electric automobile. The module is as the important constitutional unit of battery package, and it provides power for whole electric automobile, is the important guarantee of electric automobile good operation.

Because the modules in the whole package need to be connected in series and in parallel by the electrically connected copper-aluminum bars, the electrically connected copper-aluminum bars need to be electrically protected, the electrically connected copper bars or aluminum bars are isolated from adjacent metal devices in the package, and the functions of insulation, pressure resistance, fire prevention, heat insulation and the like are achieved.

The external insulation mode of the copper aluminium bar of connecting between current battery module adopts pyrocondensation pipe, PA12 sleeve pipe etc. mostly, and its temperature resistant grade is lower, and because the misoperation when the battery package, when producing a large amount of heats because of the electric current is too big, this type of insulating material will lose efficacy, arouses the short circuit between the electric connection circuit, and then has the aggravation battery package explosion, arouses the possibility of conflagration.

At present, some electrically connected aluminum and copper busbars adopt a high-temperature-resistant mica plate or mica tape for insulation and fireproof protection, but the scheme does not utilize the development of light weight of a battery pack and has higher cost. The copper-aluminum busbar protected by the ceramic silica gel and the high-molecular temperature-resistant material has the defects of high cost and low cost and mass production.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an electrical connection bus bar structure to provide a technical solution for electrical connection bus bar fire prevention and insulation.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides an electric connection busbar structure, electric connection busbar structure includes female body of arranging to in partial length the parcel has the fire prevention mud layer on female the arranging body, and will wrap up the fire prevention mud layer bind in the constraint layer on female the arranging body.

Furthermore, the thickness of the fireproof mud layer is between 0.3 and 3 mm.

Further, the busbar body is a copper bar.

Further, the busbar body is an aluminum busbar.

Furthermore, the binding layer is made of heat shrink tube.

Further, the pyrocondensation pipe has the middle part section that is located the fire prevention mud layer periphery to and be located two end section in the fire prevention mud layer both ends outside respectively, two the end section all wraps up on female the arranging body.

Furthermore, in the heat-shrinkable tube, elastic sealing parts are arranged at the connecting positions of the middle section and the two end sections.

Furthermore, the elastic sealing part adopts a sealing ring sleeved on the busbar body.

Compared with the prior art, the utility model discloses following advantage has:

electric connection female arranging structure, adopt fire prevention mud to scribble in the surface of female row body and form the fire prevention mud layer to through at the outside cladding constraint layer of fire prevention mud layer, prevent that the fracture of fire prevention mud layer from droing, make female row body have good fire prevention and insulating properties, thereby for electric connection female fire prevention and insulation of arranging provide the technical scheme of the technique implementation of being convenient for, have lower cost advantage.

In addition, according to the size of the transmission current of the busbar body, the thickness of the fireproof mud layer can be flexibly adjusted within the thickness range of 0.3-3mm, and reliable insulation and fireproof effects can be achieved. The binding layer adopts the heat shrinkable tube, so that the binding layer has the characteristics of convenient purchase and good insulativity, and can form good coating and protection on the busbar body and the external fireproof mud layer thereof.

Another object of the present invention is to provide a battery pack, the battery pack is provided with an internal electric connecting structure. Compared with the prior art, the utility model provides a female arranging of electricity connection of battery package has good fire prevention and insulating properties, and holistic fire prevention insulating technical scheme has lower cost advantage.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions thereof are provided to explain the present disclosure, wherein the related terms in the front, back, up, down, and the like are only used to represent relative positional relationships, and do not constitute an undue limitation of the present disclosure. In the drawings:

fig. 1 is a schematic view illustrating an electrical connection busbar according to a first embodiment of the present invention connected between two battery modules;

fig. 2 is a schematic longitudinal sectional view of an electrical connection busbar structure according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of B-B of FIG. 2;

description of reference numerals:

1. a busbar body; 2. a fireproof mud layer; 3. a tie layer; 301. a middle section; 302. an end section; 4. a seal ring; 7. a battery module is provided.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to an electric connection busbar structure, which is used for forming fireproof and insulating protection on an electric connection busbar and has the advantages of convenience in technical implementation and good cost.

This female structure of arranging of electricity connection is including female the arranging body, and the parcel has the fire prevention mud layer on partial length female arranging body, simultaneously, has the constraint layer of the fire prevention mud layer constraint on female arranging body of parcel.

Based on the above design concept, an exemplary structure of the electrical connection busbar structure of the present embodiment is shown in fig. 1 and 2.

It should be noted that, as an insulating and fireproof protection scheme for the electrically connected busbar, the structure may be used for the connecting busbar between the battery modules 7 of the battery pack shown in fig. 1, and may also be used in a scenario of electrically connected lines.

As shown in fig. 2, on the busbar body 1 electrically connected with the busbar, except for the parts used for fastening and connecting the end parts of the busbar body 1, the parts between the end parts can be provided with the electrically connected busbar structure. The structure comprises a busbar body 1, a fireproof mud layer 2 wrapped on the partial length of the busbar body 1 and a binding layer 3 for binding the wrapped fireproof mud layer 2 on the busbar body 1.

The fireproof mud layer 2 is formed by coating fireproof mud, and the coating thickness is preferably set to be 0.3-3 mm. The fireproof mud layer 2 with the thickness of 0.3-3mm is arranged according to the transmission current of the busbar body 1, so that reliable insulation and fireproof effects can be achieved. When the load current of the busbar body 1 is increased, the thickness of the fireproof mud layer 2 is correspondingly thickened.

Female body 1 that arranges in this embodiment can be the copper bar, perhaps aluminium row, and also or other electric connection expose the circuit, and the electric connection that carries out insulating fire prevention protection to these needs is female arranges, all can adopt the utility model discloses a female structure of arranging is protected in the electricity connection.

As shown in fig. 3, in order to form a good coating and protection for the busbar body 1 and the external fireproof mud layer 2 thereof, the external coating of the fireproof mud layer 2 is provided with the binding layer 3, preferably, the binding layer 3 is a heat shrink tube to make full use of the good heat shrink molding performance of the binding layer 3, and the binding layer 3 has the characteristics of convenient purchase and good insulation, and can form a good binding and protection outside the fireproof mud layer 2.

As shown in fig. 2, based on the above arrangement, the length of the heat shrinkable tube is longer than the length of the fire-proof mud layer 2, that is, the two ends of the heat shrinkable tube exceed the ends of the fire-proof mud layer 2, so that the heat shrinkable tube has a middle section 301 located at the periphery of the fire-proof mud layer 2 and two end sections 302 located at the outer sides of the two ends of the fire-proof mud layer 2, and the two end sections 302 are wrapped on the busbar body 1. The two ends of the heat-shrinkable tube are lengthened by the length of the fireproof mud layer 2 to form an end section 302 which can directly wrap the busbar body 1, and the two ends of the fireproof mud layer 2 can be prevented from cracking and falling off.

In addition, in order to reduce the occurrence of the situation that the mineral materials falling off from the end part of the fireproof mud layer 2 leak to the outside of the binding layer 3, elastic sealing parts are respectively arranged at the connecting positions of the two end part sections 302 and the middle section 301 in the heat-shrinkable tube; the elastic sealing part can be arranged by adopting sealant. Preferably, in this embodiment, the elastic sealing portion is a sealing ring 4 sleeved on the busbar body 1. The arrangement of the elastic sealing part can solve the problem that the end section 302 is not tightly wrapped on the busbar body 1; and adopt sealing washer 4 to use as elastic sealing portion, the outfit of being convenient for, and the specification model is various, is convenient for select the ready-made product that is fit for female arranging body 1 size demand.

The female structure of arranging of electricity connection, adopt fire prevention mud to scribble in female surface of arranging body 1 and form fire prevention mud layer 2 to through at the outside cladding tie layer 3 of fire prevention mud layer 2, prevent that the fracture of fire prevention mud layer 2 from droing, make female body 1 of arranging have good fire prevention and insulating properties, thereby provide the technical scheme of the technique implementation of being convenient for the female fire prevention and the insulation of arranging of electricity connection.

Example two

The embodiment relates to a battery pack, which is characterized in that a plurality of groups of battery modules 7 are arranged in the battery pack, an electric connection busbar is connected between each battery module 7, and an electric connection busbar structure provided by the first embodiment is adopted on the electric connection busbar. The use of this structure can make the female row of electric connection have good fire prevention and insulating properties, and holistic fire prevention insulating technical scheme is convenient for the technique to implement, and have lower cost advantage.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an electric connection busbar structure which characterized in that: the electric connection busbar structure comprises a busbar body (1), a fireproof mud layer (2) wraps the busbar body (1) in part of the length, and the fireproof mud layer (2) wraps the busbar body (1) and is bound on a binding layer (3) on the busbar body (1).

2. The electrical connection busbar structure according to claim 1, wherein: the thickness of the fireproof mud layer (2) is 0.3-3 mm.

3. The electrical connection busbar structure according to claim 1, wherein: the busbar body (1) is a copper bar.

4. The electrical connection busbar structure according to claim 1, wherein: the busbar body (1) is an aluminum busbar.

5. The electrical connection busbar structure according to any one of claims 1 to 4, wherein: the binding layer (3) is made of a heat shrinkable tube.

6. The electrical connection busbar structure according to claim 5, wherein: the heat-shrinkable tube is provided with a middle section (301) located on the periphery of the fireproof mud layer (2) and two end sections (302) respectively located on the outer sides of two ends of the fireproof mud layer (2), and the two end sections (302) are wrapped on the busbar body (1).

7. The electrical connection busbar structure according to claim 6, wherein: and elastic sealing parts are arranged at the connecting positions of the middle section (301) and the two end sections (302) in the heat-shrinkable tube.

8. The electrical connection busbar structure according to claim 7, wherein: the elastic sealing part adopts a sealing ring (4) sleeved on the busbar body (1).

9. A battery pack, wherein the battery pack has an electrical connection busbar structure according to any one of claims 1 to 8.