CN219739231U - A battery device and an electrical device - Google Patents

Abstract

The utility model discloses a battery device and an electricity utilization device, wherein the battery device comprises: the battery pack comprises at least two single batteries, wherein the single batteries comprise a first electrode terminal and a second electrode terminal which are opposite in polarity, and the first electrode terminal and the second electrode terminal are arranged on the same end face of the single batteries; bus bars, one bus bar is respectively connected with the first electrode terminal and the second electrode terminal of different single batteries, two bus bars are respectively connected with the first electrode terminal and the second electrode terminal of the same single battery, and the two bus bars are respectively connected with the first electrode terminal and the second electrode terminal of the same single batteryInsulating parts are arranged between the bus bars, and the resistivity of the insulating parts is more than 10 ⁶ Omega cm. The utility model is characterized in that an insulating part is arranged between two buses on the same single battery, and the resistivity of the insulating part is ensured to be more than 10 ⁶ Omega cm, thereby insulating two buses well, avoiding the connection short circuit of the first electrode terminal and the second electrode terminal of the single battery, ensuring the safety of the battery device, and improving the safety of the power utilization device.

Description

A battery device and an electrical device

Technical field

The utility model relates to the field of battery technology, and in particular to a battery device and an electrical device.

Background technique

With the development and advancement of technology, the use of electric vehicles has become increasingly widespread. A battery pack is provided in an electric vehicle to store electrical energy and provide energy to the electric vehicle. There are multiple single cells in the battery pack, and the multiple single cells are electrically connected through busbars. The single battery includes a casing and a pole, both of which are made of metal. When the busbar is connected to the positive and negative electrodes of the single battery, the positive and negative electrodes of the single battery must be insulated to avoid short circuits.

Utility model content

In order to solve the above-mentioned defects in the prior art, one of the purposes of the present invention is to provide a battery device that can effectively ensure the electrical connection between single cells, avoid the occurrence of short circuit, and ensure the safety of the battery device.

In order to solve the above-mentioned defects of the prior art, the second object of the present invention is to provide an electrical device with high safety features.

The technical solution provided according to one of the purposes of this utility model is as follows:

A battery device including:

At least two single cells, the single cells include first electrode terminals and second electrode terminals with opposite polarities, and the first electrode terminal and the second electrode terminal are located on the same end surface of the single cells;

Bus bar, one bus bar is connected to the first electrode terminal and the second electrode terminal of different single cells respectively, two bus bars are respectively connected to the first electrode terminal and the second electrode terminal of the same single cell, and the two bus bars There is an insulating piece between them, and the resistivity of the insulating piece is >10 ⁶ Ω.cm.

The battery device of the present utility model can effectively insulate the two bus bars by arranging an insulating member between two bus bars on the same single cell and ensuring that the resistivity of the insulating member is greater than 10 ⁶ Ω.cm. This avoids a short circuit between the first electrode terminal and the second electrode terminal of the single battery itself, thereby ensuring the safety of the battery device.

The technical solution provided according to the second purpose of this utility model is as follows:

An electrical device includes the above battery device.

Since the risk of short circuit of single cells in the battery device is reduced, the safety of use of the battery device is improved, thereby improving the safety of the electrical device.

Description of the drawings

Figure 1 is a schematic structural diagram of the battery device in the embodiment;

Figure 2 is a schematic structural diagram of a single battery and a busbar;

Figure 3 is an exploded view of a single cell and busbar.

Among them, the reference symbols have the following meanings:

1. Single battery; 11. Case; 12. pole; 2. bus bar; 21. first bus part; 22. second bus part.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal" and "top" The orientations or positional relationships indicated by "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply what is meant. Devices or components must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

This embodiment provides a battery device. Refer to FIG. 1 . The battery device includes a box and a plurality of single cells 1 arranged in the box. The single cell 1 includes a first electrode terminal and a second electrode terminal with opposite polarities. The first electrode terminal and the second electrode terminal are provided on the same end surface of the single cell 1 . The single cells 1 are connected through busbars 2. Specifically, one busbar 2 is connected to the first electrode terminal and the second electrode terminal of different single cells 1, and the two busbars 2 are respectively connected to the first electrode terminal and the second electrode terminal of the same single cell 1. The first electrode terminal and the second electrode terminal are provided with an insulating member between the two busbars 2, and the resistivity of the insulating member is >10 ⁶ Ω.cm. The battery device of this embodiment provides an insulator between the two busbars 2 on the same single cell 1 and ensures that the resistivity of the insulator is greater than 10 ⁶ Ω.cm, thereby effectively insulating the two busbars 2 Insulation prevents short circuit between the first electrode terminal and the second electrode terminal of the single cell 1 itself, ensuring the safety of the battery device.

Referring to Figures 2 and 3, the bus bar 2 includes a first bus part 21 and a second bus part 22. The first bus part 21 of the same bus bar 2 is connected to the first electrode terminal of a single battery 1, and the second bus part 22 Connect the second electrode terminal of another single cell 1 to electrically connect different single cells 1 through a bus 2 . It should be noted that the number of the first bus parts 21 and the second bus parts 22 of one bus bar 2 can be multiple, so that multiple single cells 1 can be electrically connected through one bus bar 2, and one single battery Battery 1 is connected to two busbars 2 .

In order to avoid a short circuit between the first electrode terminal and the second electrode terminal on the single cell 1, a gap is provided between the two busbars 2 connected to the same single cell 1, and an insulator is provided in the gap. Therefore, the insulation between the two bus bars 2 is achieved through the insulating member, and the insulation between the first electrode terminal and the second electrode terminal on a single cell 1 is achieved.

In this embodiment, the insulating member is an insulating glue layer coated between two bus bars 2 on the same single cell 1. Since the insulating glue has fluidity before molding, it can not only be placed between the two bus bars 2, but also It can also flow into gaps and have better insulation effect.

Moreover, the thickness of the insulating glue layer in this embodiment is 0.5-2 mm, and the thickness refers to the thickness from one bus bar 2 to another bus bar 2 on the same single cell 1 . An insulating glue layer between one bus bar 2 and another bus bar 2 on the same single cell 1 can better insulate the two bus bars 2, and the thickness of the insulating glue layer is too thin and is easily broken down by current, so , the thickness of the insulating glue layer is not less than 0.5mm. As we all know, the greater the thickness of the insulating adhesive layer and the greater the insulation resistance, the better it can ensure the insulation between two adjacent busbars 2 on the same single cell 1, and generally, the insulation between the two adjacent busbars 2 on the same single cell 1 The gap between row 2 and the other bus bar does not exceed 2mm, so the thickness of the insulating glue layer does not exceed 2mm.

Furthermore, in order to better realize the insulation effect between the two bus bars 2 on the same single cell 1, the insulating glue layer in this embodiment is provided between the two bus bars 2 on the same single cell 1 and covers it. The first bus part 21 and/or the second bus part 22, so that on the basis of ensuring the insulation between the two bus bars 2 on the same single cell 1, the first bus part 21 and/or the second bus bar 22 on the single cell 1 Or the surface of the second bus part 22 is also provided with insulation, which further improves the insulation effect between the two bus bars 2 on the same single cell 1 .

Furthermore, the insulating glue layer of this embodiment is disposed between two busbars 2 on the same single cell 1 and covers the busbars 2, thereby ensuring insulation between the two busbars 2 on the same single cell 1. On the basis of, the entire surface of the busbar 2 is insulated, and the insulation effect between the two busbars 2 on the same single cell 1 is further improved to avoid the first electrode terminal and the second electrode terminal of the single cell 1 itself. The connection is short-circuited, ensuring the safety of the battery device.

As for the single cell 1 of this embodiment, it includes a casing 11 and a pole 12 , and the pole 12 is protruding from the casing 11 . The single battery 1 of this embodiment can be a square battery. The pole 12 of the square battery includes a positive pole and a negative pole. The positive pole and the negative pole are arranged on the same end surface of the housing 11. The negative pole is the first electrode terminal, and the positive pole is the second electrode terminal.

Or, referring to Figures 2 and 3, the single battery 1 of this embodiment is a cylindrical battery. The pole 12 of the cylindrical battery is protruding from the end surface of the casing 11. The pole 12 is the second electrode terminal. The end face of the pole 12 is the first electrode terminal. Other types of batteries are not listed one by one.

In addition, this embodiment also provides an electrical device, including the above battery device. Since the risk of short circuit of the single cell 1 in the battery device is reduced, the safety of use of the battery device is improved, thereby improving the safety of the electrical device.

The technical solution of the present invention will be described in detail below through several examples and comparative examples.

Example 1

This embodiment provides a battery device, which includes a box and a plurality of cylindrical batteries arranged in the box. The cylindrical batteries include a cylindrical shell 11 and a cylindrical pole 12 . The pole 12 is protruding from the shell 11 On the end face, the pole 12 is the second electrode terminal, and the end face of the housing 11 with the pole 12 is the first electrode terminal. The first electrode terminal and the second electrode terminal have opposite polarities. The cylindrical batteries are connected through busbars 2. One busbar 2 is connected to the poles 12 and casings 11 of different cylindrical batteries, and the two busbars 2 are respectively connected to the poles 12 and casing 11 of the same cylindrical battery. There is an insulating piece between the two busbars 2, and the resistivity of the insulating piece is 2*10 ⁹ Ω.cm.

Example 2

This embodiment provides a battery device, which includes a box and a plurality of cylindrical batteries arranged in the box. The cylindrical batteries include a cylindrical shell 11 and a cylindrical pole 12 . The pole 12 is protruding from the shell 11 On the end face, the pole 12 is the second electrode terminal, and the end face of the housing 11 with the pole 12 is the first electrode terminal. The first electrode terminal and the second electrode terminal have opposite polarities. The cylindrical batteries are connected through busbars 2. One busbar 2 is connected to the poles 12 and casings 11 of different cylindrical batteries, and the two busbars 2 are respectively connected to the poles 12 and casing 11 of the same cylindrical battery. There is an insulating piece between the two bus bars 2, and the resistivity of the insulating piece is 2*10 ⁸ Ω.cm.

Example 3

This embodiment provides a battery device, which includes a box and a plurality of cylindrical batteries arranged in the box. The cylindrical batteries include a cylindrical shell 11 and a cylindrical pole 12 . The pole 12 is protruding from the shell 11 On the end face, the pole 12 is the second electrode terminal, and the end face of the housing 11 with the pole 12 is the first electrode terminal. The first electrode terminal and the second electrode terminal have opposite polarities. The cylindrical batteries are connected through busbars 2. One busbar 2 is connected to the poles 12 and casings 11 of different cylindrical batteries, and the two busbars 2 are respectively connected to the poles 12 and casing 11 of the same cylindrical battery. There is an insulating piece between the two bus bars 2, and the resistivity of the insulating piece is 7.8*10 ⁸ Ω.cm.

Comparative example 1

This comparative example provides a battery device, which includes a box and a plurality of cylindrical batteries arranged in the box. The cylindrical battery includes a cylindrical shell 11 and a cylindrical pole 12. The pole 12 is protruding from the shell 11. On the end face, the pole 12 is the second electrode terminal, and the end face of the housing 11 with the pole 12 is the first electrode terminal. The first electrode terminal and the second electrode terminal have opposite polarities. The cylindrical batteries are connected through busbars 2. One busbar 2 is connected to the poles 12 and casings 11 of different cylindrical batteries, and the two busbars 2 are respectively connected to the poles 12 and casing 11 of the same cylindrical battery. There is an insulating piece between the two bus bars 2, and the resistivity of the insulating piece is 1*10 ⁵ Ω.cm.

Next, the insulation between the poles 12 and the casing 11 of the cylindrical battery in the battery devices of Examples 1-3 and Comparative Example 1 is tested: GB/T 28046.4-2011 is used for testing. When the cylindrical battery itself When the insulation resistance between the pole 12 and the casing 11 is greater than 10 MΩ, it means that there is good insulation between the pole 12 and the casing 11 .

Table 1 shows the test results of Examples 1-3 and Comparative Example 1.

As can be seen from Table 1, the utility model limits the resistivity of the insulator between two adjacent busbars 2 on the same single cell 1 to be greater than 10 ⁶ Ω.cm, which can insulate the two busbars 2 well. This avoids a short circuit between the first electrode terminal and the second electrode terminal of the single cell 1 itself, thereby ensuring the safety of the battery device.

The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (9)

1. A battery device, characterized in that it includes: At least two single cells. The single cells include first electrode terminals and second electrode terminals with opposite polarities. The first electrode terminal and the second electrode terminal are provided on the same end surface of the single cells. ; Bus bar, one bus bar is connected to the first electrode terminal and the second electrode terminal of different single cells respectively, and two bus bars are connected to the first electrode terminal of the same single cell respectively. The electrode terminal and the second electrode terminal are provided with an insulating member between the two bus bars, and the resistivity of the insulating member is >10 ⁶ Ω.cm. 2. A battery device according to claim 1, characterized in that the bus bar includes a first bus part and a second bus part, and the first bus part connects the third busbar of one of the single cells. An electrode terminal, the second bus part is connected to the second electrode terminal of the other single cell. 3. A battery device according to claim 1, characterized in that: the single battery is a cylindrical battery, the cylindrical battery includes a casing and a pole, and the pole is protruding from the casing. , the housing is the first electrode terminal, and the pole is the second electrode terminal. 4. The battery device according to claim 1, wherein a gap is provided between two bus bars on the same single cell, and the insulating member is provided in the gap. 5. The battery device according to claim 1, wherein the insulating member is an insulating glue layer. 6. A battery device according to claim 5, characterized in that: from one bus bar to another bus bar on the same single cell, the thickness of the insulating glue layer is 0.5- 2mm. 7. A battery device according to claim 2, characterized in that the insulating member is provided between two bus bars on the same single cell and covers the first bus part and/or Or the second confluence part. 8. The battery device according to claim 1, wherein the insulating member is provided between two bus bars on the same single cell, and the insulating member covers the bus bar. . 9. An electrical device, characterized in that it includes the battery device according to any one of claims 1-8.