CN212625462U

CN212625462U - Alloy type thermal link of multiple-end protection

Info

Publication number: CN212625462U
Application number: CN202021500977.7U
Authority: CN
Inventors: 黄生荣; 郭源星
Original assignee: Zhangzhou Yabao Electronics Co ltd
Current assignee: Zhangzhou Yabao Electronics Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-02-26
Anticipated expiration: 2030-07-27

Abstract

The utility model belongs to the technical field of thermal fuse-link, in particular to a multi-end protected alloy type thermal fuse-link, which comprises a shell and a temperature sensing alloy component; the temperature sensing alloy subassembly is provided with the multiunit, and sealed the setting in the shell, and the temperature sensing alloy subassembly includes temperature sensing body and pin, has seted up a plurality of sets of mounting grooves in the inside of shell, and the temperature sensing alloy subassembly passes through the mounting groove and installs in the shell, and the port department embedment of shell is equipped with seals the resin. The utility model discloses the temperature sensing alloy subassembly passes through mounting groove seal installation and establishes inside the shell, can monitor 2, 4 even 6 batteries simultaneously through temperature sensing body and pin, when one of them battery is unusual, can in time peel off all batteries from the circuit simultaneously, prevents to catch fire etc. great risk.

Description

Alloy type thermal link of multiple-end protection

Technical Field

The utility model belongs to the technical field of the thermal link, concretely relates to alloy type thermal link of multiple-end protection.

Background

The secondary battery mainly includes nickel-hydrogen battery, nickel-cadmium battery, lithium ion battery, lithium polymer battery, etc., the lithium battery has the advantages of high energy density, high operating voltage, large using temperature range, no memory effect, long service life, capability of being charged and discharged for many times, etc., and is widely used in portable electronic products, such as rechargeable electric tools and toys, and is more expanded to the automobile field in recent years, and the most known case is the series-parallel combination of 18650 batteries. A plurality of battery cells are generally connected in series or in parallel to output a desired voltage and current from the battery pack. The structure of the battery core mainly comprises a positive electrode material, electrolyte, a negative electrode material, a separation film and a shell. The separator is mainly used for separating the anode material from the cathode material so as to prevent the anode material from contacting with the cathode material to cause short circuit of the battery. The separator contains a plurality of pores; and the electrolyte is soaked in the isolating membrane and plays a role in conducting electricity as ionic charges. The positive electrode material, the negative electrode material, the electrolyte and the isolating membrane are coated inside the shell. When one of the battery cells of the battery pack malfunctions, the electrolyte runs the risk of being sprayed or oozed, and may be conducted to other battery cells and conductive sheets in a liquid or gaseous state. The conductive sheet transfers heat of the damaged battery to other battery cells in a heat conduction manner, and the temperature of the other battery cells may be abnormally increased, which may cause damage to the other battery cells, thereby compromising the safety of the entire battery pack, and may cause devices using the battery, such as electric tools or automobiles, to be burned on fire. When the battery is damaged and abnormal temperature rises, the battery needs to be peeled off from the circuit in time. In the traditional battery protection, a PPTC thermistor is arranged near each battery electrode, when the battery is abnormally damaged and heated, the PPTC senses abnormal temperature rise, the resistance is rapidly increased, but the damaged battery still has current passing through, the abnormal temperature rise speed of the battery is reduced, but the abnormality is not eliminated; it is also possible to transmit the abnormal temperature rise to other batteries, resulting in excessive temperatures of the other batteries, which brings a great risk to the entire battery pack. The alloy type thermal link with multi-end protection can just effectively solve the problem.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides an alloy type thermal link of multi-end protection, temperature sensing alloy subassembly pass through mounting groove seal installation and establish inside the shell, can monitor 2, 4 even 6 batteries simultaneously through temperature sensing body and pin, when one of them battery is unusual, can in time peel off all batteries from the circuit simultaneously, prevent major risks such as catching fire.

In order to achieve the above object, the utility model provides a following technical scheme: an alloy type thermal link with multi-end protection comprises a shell and a temperature sensing alloy component; the temperature sensing alloy subassembly is provided with the multiunit, and sealed the setting in the shell, and the temperature sensing alloy subassembly includes temperature sensing body and pin, has seted up a plurality of sets of mounting grooves in the inside of shell, and the temperature sensing alloy subassembly passes through the mounting groove and installs in the shell, and the port department embedment of shell is equipped with seals the resin.

Preferably, a first thermal fuse link assembly mounting groove, a second thermal fuse link assembly mounting groove and a third thermal fuse link assembly mounting groove are sequentially formed in the housing from the outside to the inside.

Preferably, the temperature sensitive alloy member is provided in 2 to 8 groups.

Preferably, the housing is made of PBT, FCP, PPS or nylon thermoplastic plastics.

Preferably, the shell is made of ceramic and bakelite insulating materials.

Preferably, the shape of the shell adopts a round shape or a square shape; or other shapes that facilitate end-customer installation.

Preferably, the temperature sensing body is made by combining indium, tin, bismuth and silver metal materials according to a proportion.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses the temperature sensing alloy subassembly passes through mounting groove seal installation and establishes inside the shell, can monitor 2, 4 even 6 batteries simultaneously through temperature sensing body and pin, when one of them battery is unusual, can in time peel off all batteries from the circuit simultaneously, prevents to catch fire etc. great risk.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a multi-terminal protected alloy thermal link according to the present invention;

FIG. 2 is a schematic cross-sectional view of an alloy thermal fuse according to the present invention;

FIG. 3 is a schematic view of a longitudinal cross-sectional structure of a multi-terminal protected alloy thermal fuse according to the present invention;

FIG. 4 is a schematic side view of the multi-terminal protected alloy thermal link of the present invention;

FIG. 5 is a schematic structural diagram of a housing in a multi-terminal protected alloy thermal fuse of the present invention;

FIG. 6 is a schematic structural diagram of a temperature-sensitive alloy assembly in a multi-terminal protected alloy thermal fuse of the present invention;

fig. 7 is another schematic structural diagram of a housing in an alloy thermal fuse according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1-7, the present invention provides the following technical solutions: an alloy type thermal link with multi-end protection comprises a shell 1 and a temperature sensing alloy component; the temperature sensing alloy subassembly is provided with the multiunit, and sealed the setting in shell 1, and the temperature sensing alloy subassembly includes temperature sensing body 2 and pin 3, has seted up a plurality of sets of mounting grooves in the inside of shell 1, and the temperature sensing alloy subassembly passes through the mounting groove to be installed in shell 1, is equipped with the resin of sealing in the port department embedment of shell 1.

Specifically, a first thermal fuse link assembly mounting groove 11, a second thermal fuse link assembly mounting groove 12, and a third thermal fuse link assembly mounting groove 13 are sequentially provided from outside to inside in the housing 1.

Specifically, the temperature-sensitive alloy component is provided with 2 groups to 8 groups.

Specifically, the housing 1 is made of PBT, FCP, PPS and nylon thermoplastic plastics.

Specifically, the housing 1 is made of ceramic and bakelite insulating materials.

Specifically, the shape of the shell 1 is circular or square; or other shapes that facilitate end-customer installation.

Specifically, the temperature sensing body 2 is made of indium, tin, bismuth and silver metal materials in a ratio.

The utility model discloses a theory of operation and use flow: when the utility model is installed and used, a plurality of groups of temperature sensing alloy components are hermetically installed in the same shell 1 corresponding to a plurality of groups of installation grooves, the port of the shell 1 is filled with sealing resin, the temperature sensing bodies 2 and the pins 3 are installed at the same heat source position of the protection device, 2, 4 or even 6 batteries can be simultaneously monitored through the temperature sensing bodies and the pins, when one of the batteries is abnormal, all the batteries can be timely stripped from the circuit at the same time, and major risks such as ignition are prevented; the multi-path protection or alarm circuit can act simultaneously, and the responsiveness of the protection circuit and the alarm circuit is ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An alloy type thermal link body with multi-end protection is characterized in that: comprises a shell (1) and a temperature sensing alloy component; the temperature sensing alloy assembly is provided with a plurality of groups, is arranged in the shell (1) in a sealing mode, comprises a temperature sensing body (2) and pins (3), is provided with a plurality of groups of mounting grooves in the shell (1), is arranged in the shell (1) through the mounting grooves, and is filled with sealing resin at the port of the shell (1).

2. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the casing (1) is internally provided with a first thermal fuse link assembly mounting groove (11), a second thermal fuse link assembly mounting groove (12) and a third thermal fuse link assembly mounting groove (13) in sequence from outside to inside.

3. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the temperature sensing alloy component is provided with 2 groups to 8 groups.

4. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the shell (1) is made of PBT, FCP, PPS and nylon thermoplastic plastics.

5. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the shell (1) is made of ceramic and bakelite insulating materials.

6. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the shape of the shell (1) adopts a round shape or a square shape.

7. A multi-terminal protected alloy type thermal fuse link according to claim 1, wherein: the temperature sensing body (2) is made by combining indium, tin, bismuth and silver metal materials according to a proportion.