KR20160061893A - Thermal protection assembly and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a thermal protecting assembly which comprises: a thermal protecting device having a first electrical connecting end part and a second electrical connecting end part; a first electrical connecting lead electrically connected to the first electrical connecting end part; a second electrical connecting lead electrically connected to the second electrical connecting end part; and an insulating body which is configured to maintain the thermal protecting device. The first and second electrical connecting leads are within the thermal protecting assembly. Reliability and stability of an electrical connection of the first and second electrical connecting leads are secured by the insulating body over-molded on the first and second electrical connecting leads to firmly fix the first and second electrical connecting leads to the insulating body, thereby simplifying a manufacturing process of the thermal protecting assembly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to thermal protection assemblies,

relation Crossing the application -Reference

This application claims the benefit of Chinese patent application No. 201410682725.3, filed November 24, 2014, to the Chinese Intellectual Property Office, the entire disclosure of which is incorporated herein by reference.

Embodiments of the present disclosure relate to a thermal protection assembly, and more particularly, to a thermal protection assembly and a method for manufacturing a thermal protection assembly configured to connect circuits in series to prevent overheating or overcurrent of a circuit load will be.

1 shows a perspective exploded view showing a prior art thermal protection assembly.

1, a prior art thermal protection assembly comprises an insulation body 1, a thermal protection device 2, a first electrical connection lead 3, a second electrical connection lead 4 and a lead reinforcement 5 ).

In the prior art, the lead reinforcement 5 is welded on the bottom surface of the second electrical connecting lead 4, which has a longer length to enhance its strength. Thereafter, the first and second electrical connection leads 3 and 4 are welded on the two terminals of the thermal protection device 2. Thereafter, the first electrical connection lead 3, the second electrical connection lead 4 and the thermal protection device 2 welded together are assembled into a mounting channel formed in the insulating body 1. [ Finally, the second electrical connecting lead 4 is riveted to the insulating main body 1.

In the prior art, the first and second electrical connection leads 3, 4 are assembled in the insulation body 1 by riveting, and the first and second electrical connection leads 3, 4 are connected to the insulation main body 1 It is difficult to tighten, which tends to loosen and will reduce the reliability and stability of the electrical connection.

Furthermore, in the prior art, the lead reinforcement 5 needs to be welded on the bottom surface of the second electrical connecting lead 4 having a longer length, which not only causes many components of the thermal protecting assembly, The manufacturing steps of the protective assembly also increase.

Moreover, in the prior art, it is necessary to assemble the first and second electrical connection leads 3, 4 into the insulation body 1, respectively, thereby increasing the manufacturing steps of the thermal protection assembly.

It would be advantageous to provide a thermal protection assembly and a method for manufacturing the same that can be held tightly within the insulation body without loosening the two electrical connection leads to ensure the reliability and stability of the electrical connection.

It would also be advantageous to provide a thermal protection assembly wherein the thermal protection assembly includes fewer components, and a method for manufacturing a reduced thermal protection assembly for manufacturing the thermal protection assembly.

According to an aspect of this disclosure, a thermal protection device having a first electrical connection end and a second electrical connection end; A first electrical connection lead electrically connected to the first electrical connection end of the thermal protection device; A second electrical connection lead electrically connected to the second electrical connection end of the thermal protection device; And an insulating body configured to hold a thermal protection device, wherein the first and second electrical connection leads are in the insulation body, wherein the first and second electrical connection leads The insulation body is overmolded over the first and second electrical connection leads.

According to an exemplary embodiment of the present invention, the accommodating chamber is formed in the insulating body, and the thermal protective device is mounted in the accommodating chamber of the insulating body.

According to another exemplary embodiment of the present invention, the thermal protection device includes a breaker device for temperature or current protection.

According to another exemplary embodiment of the present invention, the thermal protection device comprises one of a dual metal sheet breaker device, a PTC device, a thermal fuse or a combination thereof.

According to another exemplary embodiment of the present invention, the thermal protection device is configured to be connected to the circuit in series via the first and second electrical connection leads to prevent overheating or overcurrent of the load in the circuit.

According to another exemplary embodiment of the present invention, the circuit is a battery charging and discharging circuit, wherein the thermal protection assembly is configured to be connected in series to the battery charging and discharging circuit through the first and second electrical connecting leads, By mounting the device directly on or close to the battery package to sense its temperature, the circuit can be turned off in time to obtain overheat protection when the battery package is overheated.

According to another exemplary embodiment of the present invention, first and second electrical connection leads are formed as bending metal strips, and the insulation body is made of plastic.

According to an exemplary embodiment of the present invention, a first electrical connection end of the thermal protection device is welded to an end of the first electrical connection lead; A second electrical connection end of the thermal protection device is welded to the end of the second electrical connection lead.

According to another exemplary embodiment of the present invention, the first and second electrical connection ends of the thermal protection device are respectively laser welded or resistance welded to the first and second electrical connection leads.

According to another aspect of the present invention, there is provided a method for manufacturing a thermal protection assembly,

Inserting the first electrical connecting lead and the second electrical connecting lead into the mold and injecting the molten insulating material into the mold so as to form an insulating body overmolded over the first and second electrical connecting leads;

Installing a thermal protection device into the insulation body; And

And welding the first electrical connection end and the second electrical connection end of the thermal protection device to the first and second electrical connection leads, respectively.

According to another exemplary embodiment of the present invention, the first and second electrical connection ends of the thermal protection device are welded to the first and second electrical connection leads, respectively, by laser welding or resistance welding.

According to another exemplary embodiment of the present invention, the receiving chamber is formed in the insulating body, and the thermal protection device is mounted in the receiving chamber of the insulating body.

In the above-mentioned various embodiments of the present invention, since the insulating body is over-molded over the first and second electrical connecting leads, the first and second electrical connecting leads are not loosened with respect to the insulating body, And the reliability and stability of the electrical connection of the first and second electrical connection leads are ensured. In addition, since both the first and second electrical connection leads are tightly held within the insulation body, this requires no additional lead reinforcement and the number of components and manufacturing steps of the thermal protection assembly are reduced. In addition, the first and second electrical connection leads are fixed within the insulation body, while the insulation body is overmolded to reduce the manufacturing steps of the thermal protection assembly.

Other features and advantages of the present disclosure will become apparent from the following detailed description, and its understanding will be readily understood with reference to the accompanying drawings.

These and other features of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic perspective exploded view illustrating a prior art thermal protection assembly.
2 is a schematic diagram illustrating first and second electrical connection leads of a thermal protection assembly in accordance with an embodiment of the present invention.
3 is a schematic view showing an insulation body formed on the first and second electrical connection leads by overmolding as shown in Fig.
4 is an exploded perspective view illustrating a thermal protection assembly in accordance with an embodiment of the present invention.
5 is a front view illustrating a thermal protection assembly in accordance with an embodiment of the present invention.
6 is a bottom view illustrating a thermal protection assembly in accordance with an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein like reference numerals refer to like elements. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be appreciated, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically illustrated to simplify the drawings.

According to a general concept of the present disclosure, a thermal protection device having a first electrical connection end electrical connection lead connection end and a second electrical connection end; A first electrical connection end electrically connected to the first electrical connection end of the thermal protection device; A second electrical connection lead electrically connected to the second electrical connection end of the thermal protection device; And an insulating body configured to hold the thermal protection device, wherein the first and second electrical connection leads are in the insulation body. The insulative body is overmolded on the first and second electrical connection leads to hold the first and second electrical connection leads within the insulation body.

FIGS. 2-4 illustrate a thermal protection assembly in accordance with an embodiment of the present invention, and FIG. 4 illustrates an exploded perspective view of a thermal protection assembly in accordance with an embodiment of the present invention.

4, the thermal protection assembly includes a first electrical connection lead 100, a second electrical connection lead 200, an insulation body 300, and a thermal protection device 400, .

As shown in FIG. 4, the thermal protection assembly 400 has first and second electrical connection ends 410 and 420 electrically connected to the first and second electrical connection leads 100 and 200, respectively.

2 is a schematic diagram illustrating first and second electrical connection leads 100, 200 of a thermal protection assembly in accordance with an embodiment of the present invention.

In an embodiment of the present invention, as shown in Figure 2, both the first and second electrical connection leads 100, 200 are formed as bend metal strips. The first electrical connection lead 100 is longer than the second electrical connection lead 200.

2 and 4, in the illustrated embodiment, the first electrical connection lead 100 includes an end 110 configured to be welded to the first electrical connection end 410 of the thermal protection device 400, And the second electrical connection lead 200 has an end 210 configured to be welded onto the second electrical connection end 420 of the thermal protection device 400.

3 is a schematic view showing an insulation body 300 formed on the first and second electrical connection leads 100 and 200 by overmolding as shown in FIG.

3 and 4, in the embodiment of the present invention, the insulating main body 300 is formed so that the first and second electrical connecting leads 100 and 200 are tightly held in the insulating main body 300, And over the second electrical connection leads 100, 200. In this manner, the first and second electrical connection leads 100 and 200 are formed by overmolding the insulation body 300 while being held firmly in the insulation body 300. It is not necessary to assemble the first and second electrical connection leads 100, 200 respectively into the insulating body 300 by any additional connecting members, thereby simplifying the manufacturing steps of the thermal protection assembly and improving the manufacturing efficiency do.

Now, a process of overmolding the insulating body 300 on the first and second electrical connecting leads 100 and 200 will be described as follows.

First, the first and second electrical connection leads 100 and 200 are inserted into a mold (not shown in the drawings); Thereafter, the molten insulating material is injected into the mold. After the insulating material has cooled and solidified, an insulating body 300 is formed which covers the first and second electrical connecting leads 100 and 200. This insulating main body 300, which is formed by injection molding so as to firmly hold the first and second electrical connecting leads 100 and 200 in the insulating main body 300 without being loosened with respect to the insulating main body 300, 1 and the second electrical connection leads 100, 200. The first and second electrical connection leads 100, The reliability and stability of the electrical connection of the first and second electrical connection leads 100 and 200 can be assured.

In an embodiment of the present invention, the insulating body 300 may be made of plastic or other suitable materials.

3 and 4, a receiving chamber 310 is formed on the insulating body 300, and a thermal protection device 400 is installed in the receiving chamber 310 of the insulating body 300.

5 is a plan view illustrating a thermal protection assembly in accordance with an embodiment of the present invention; 6 is a bottom view illustrating a thermal protection assembly in accordance with an embodiment of the present invention.

5 and 6, after the thermal protection device 400 is installed in the receiving chamber 310 of the insulating main body 300, the first and second electrical ends 410, 420 are welded on the ends 110, 210 of the first and second electrical connection leads 100, 200, respectively. In this manner, the entire production process of the thermal protection assembly is terminated.

In an embodiment of the present invention, the connection first and second electrical connection ends 410, 420 of the thermal protection device 400 are connected to the first and second electrical connection leads 100, 200, respectively, Welded. Laser welding has the advantage that the welding can be performed quickly, the welding spot is fixed, and no welding wire is needed. However, the present invention is not limited to this, and the first and second electrical connection ends 410 and 420 of the thermal protection device 400 may be connected to the first and second electrical connection leads 100 and 200 The first and second electrical connection ends 410 and 420 of the thermal protection device 400 may be welded to the first and second electrical connection leads 100 and 200 Respectively.

The first and second electrical connection ends 410 and 420 of the thermal protection device 400 are electrically connected to the first and second electrical connection leads 100 and 200 in the exemplary embodiment as shown in Figures 5 and 6, Respectively, and the thermal protection device 400 is connected to the series circuit through the first and second electrical connection leads 100 and 200 to prevent overheating or overcurrent of the circuit's load.

In an embodiment of the present invention, thermal protection device 400 may include a breaker device for temperature and / or current protection. For example, the thermal protection device 400 may include a double metal sheet breaker, a PTC (constant temperature coefficient) device, a thermal fuse, or a combination thereof. As such, after the thermal protection device 400 is connected in series to the circuit through the first and second electrical connection leads 100, 200, the thermal protection device 400 may break the circuit in time or reduce the current to a very small value Thereby preventing a load, such as a battery or electrical equipment, in the circuit from burning or exploding due to overheating or overcurrent.

In an embodiment of the present invention, a thermal protection assembly is configured for being connected in series to the battery charging and discharging circuit through the first and second electrical connection leads 100, 200, The thermal protection device 400 may be installed directly on or close to the battery package to sense its temperature so that the circuit may be turned off at an instant to obtain overheating protection when the battery package is overheated.

According to another embodiment of the present invention, there is provided a method of manufacturing a thermal protection assembly as mentioned in the above embodiments, comprising the following steps.

S110: The first and second electrical connection leads 100 and 200 are inserted into the mold to form the insulation body 300 on the first and second electrical connection leads 100 and 200 by overmolding, Inserting an insulating material into the mold.

S120: installing the thermal protection device 400 into the insulation body 300, and

S130: welding the first and second electrical connection ends 410 and 420 of the thermal protection device 400 to the first and second electrical connection leads 100 and 200, respectively.

As mentioned above, in step S130, the first and second electrical connection ends 410, 420 of the thermal protection device 400 are electrically connected to the first and second electrical connection leads 100, 200 Respectively.

It should be understood by those skilled in the art that the above embodiments are intended to be illustrative and not restrictive. For example, many enhancements may be made by those skilled in the art, and various features in different embodiments may be freely combined with one another without conflict of construction or principle.

Although several exemplary embodiments have been shown and described, various changes or modifications may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the claims and their equivalents It will be understood by those skilled in the art.

As used herein, an element that is quoted in a singular and commensurate with the article "a" or "an" does not exclude a plurality of such elements or steps (unless such exclusion is explicitly stated). In addition, references to elements of the present invention are not intended to be construed as limiting the protection scope of the present invention.

Claims (12)

As a thermal protection assembly,
A thermal protection device having a first electrical connection end and a second electrical connection end;
A first electrical connection lead electrically connected to the first electrical connection end of the thermal protection device;
A second electrical connection lead electrically connected to the second electrical connection end of the thermal protection device; And
An insulating body configured to hold a thermal protection device,
The first and second electrical connection leads being in the insulation body,
An insulative body is overmolded over the first and second electrical connection leads to hold the first and second electrical connection leads within the insulation body,
Thermal protection assembly.
The method according to claim 1,
The accommodating chamber is formed in the insulating body, and the thermal protecting device is mounted in the receiving chamber of the insulating body.
Thermal protection assembly.
The method according to claim 1,
The thermal protection device includes a breaker device for temperature or current protection,
Thermal protection assembly.
The method of claim 3,
The thermal protection device may include one of a dual metal sheet breaker device, a PTC device, a thermal fuse, or a combination thereof.
Thermal protection assembly.
The method according to claim 1,
The thermal protection device is configured to be connected to the circuit in series through the first and second electrical connection leads to prevent overheating or overcurrent of the load in the circuit,
Thermal protection assembly.
6. The method of claim 5,
The circuit includes a battery charging and discharging circuit wherein the thermal protection assembly is configured to be connected in series to the battery charging and discharging circuit through the first and second electrical connecting leads,
When the cells of the battery package are charged and discharged, the thermal protection device may be installed on or close to the battery package to sense its temperature, When turned off,
Thermal protection assembly.
The method according to claim 1,
Wherein the first and second electrical connection leads are formed as bending metal strips and the insulation body is made of plastic,
Thermal protection assembly.
The method according to claim 1,
A first electrical connection end of the thermal protection device is welded to an end of the first electrical connection lead; And a second electrical connection end of the thermal protection device is welded to an end of the second electrical connection lead,
Thermal protection assembly.
9. The method of claim 8,
Characterized in that the first and second electrical connection ends of the thermal protection device are respectively laser welded or resistance welded to the first and second electrical connection leads,
Thermal protection assembly.
A method for manufacturing a thermal protection assembly,
Inserting the first electrical connecting lead and the second electrical connecting lead into the mold and injecting the molten insulating material into the mold so as to form an insulating body overmolded over the first and second electrical connecting leads;
Installing a thermal protection device into the insulation body; And
And welding the first electrical connection end and the second electrical connection end of the thermal protection device to the first and second electrical connection leads, respectively,
A method for manufacturing a thermal protection assembly.
11. The method of claim 10,
Characterized in that the first and second electrical connection ends of the thermal protection device are welded to the first and second electrical connection leads respectively by laser welding or resistance welding,
A method for manufacturing a thermal protection assembly.
11. The method of claim 10,
Characterized in that the receiving chamber is formed in the insulating body and the thermal protection device is mounted in the receiving chamber of the insulating body.
A method for manufacturing a thermal protection assembly.

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