CN216815803U

CN216815803U - Wireless passive temperature sensor for mounting battery

Info

Publication number: CN216815803U
Application number: CN202220360079.9U
Authority: CN
Inventors: 曾强
Original assignee: Shenzhen Kemin Sensor Co ltd
Current assignee: Shenzhen Kemin Sensor Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-06-24
Anticipated expiration: 2032-02-22

Abstract

The utility model is suitable for the technical field of temperature sensors. The utility model discloses a wireless passive temperature sensor for mounting a battery, which comprises an RFID chip (1), epoxy resin (2), an FPC (flexible printed circuit) board (3), a metal antenna (4), a metal fixing piece (5), heat-conducting silica gel (6) and a plastic package shell (7); the utility model has the beneficial effects that: firstly, the performance is excellent, the structure is simple, firm and safe; secondly, the steady-state temperature fluctuation is small, the anti-interference capability is strong, and the reliability is high; thirdly, the temperature sensing device is suitable for sensing the surface temperature of the new energy automobile battery system; fourthly, the thermal response time is fast, the volume is small, and the wireless power supply is free.

Description

Wireless passive temperature sensor for mounting battery

Technical Field

The utility model relates to the technical field of temperature sensors, in particular to a wireless passive temperature sensor for mounting a battery.

Background

A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. Temperature sensor who uses in the new energy automobile mainly includes: a temperature sensor that detects the temperature of the battery, a temperature sensor that detects the temperature of the motor, and a temperature sensor that detects the cooling system of the battery, etc. In particular, batteries for new energy vehicles provide optimal energy output only at a precisely defined operating temperature, and therefore, reliable monitoring and regulation of the battery temperature is required to prevent overheating of the battery, maximize the reliability of the battery, and extend the operating life of the battery. This requires the use of a temperature sensor that detects the temperature of the battery.

The existing temperature sensor for detecting the temperature of the battery has the following defects: firstly, the performance is poor, the structure is complex, and the safety is not firm enough; secondly, the steady-state temperature fluctuation is large, the anti-interference capability is low, and the reliability is low; thirdly, the surface temperature sensing is not suitable for a new energy automobile battery system; fourthly, the thermal response time is slow, and the volume is large.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of providing a wireless passive temperature sensor for mounting a battery, which is suitable for sensing the surface temperature of a new energy automobile battery system; the thermal response time is fast, small, wireless, no power supply.

In order to solve the problems, the utility model provides a wireless passive temperature sensor for mounting a battery, which comprises an RFID chip, epoxy resin, an FPC (flexible printed circuit) board, a metal antenna, a metal fixing sheet, heat-conducting silica gel and a plastic package shell, wherein the RFID chip is arranged on the outer surface of the FPC board; the metal fixing piece is provided with a mounting groove; the RFID chip is welded with the FPC circuit board; the metal antenna is arranged in the FPC circuit board; the RFID chip is insulated, packaged and protected by epoxy resin; the RFID chip is fixed in the mounting groove by using heat-conducting silica gel; the plastic package shell is used for fixedly packaging the RFID chip and the metal fixing piece in a dispensing mode, and the RFID chip is arranged in the plastic package shell.

Furthermore, the RFID chip is a radio frequency identification electronic temperature chip.

Furthermore, the metal fixing sheet is made of aluminum metal.

Furthermore, the metal antenna is a metal wire, and the surface of the metal antenna is packaged by an insulating material.

Furthermore, the FPC circuit board is a flexible circuit board.

The utility model has the beneficial effects that: firstly, the performance is excellent, the structure is simple, firm and safe; secondly, the steady-state temperature fluctuation is small, the anti-interference capability is strong, and the reliability is high; thirdly, the temperature sensing device is suitable for sensing the surface temperature of the new energy automobile battery system; fourthly, the thermal response time is fast, the volume is small, and the wireless power supply is free.

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, and it is obvious that the drawings in the description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic view of fig. 1 with the metal fixing sheet, the heat conductive silicone rubber, and the plastic package housing removed.

Fig. 4 is a top view of fig. 3.

The implementation, functional characteristics and advantages of the present invention will be further explained with reference to the attached drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, 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. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 4, the wireless passive temperature sensor for mounting a battery includes an RFID chip 1, an epoxy resin 2, an FPC board 3, a metal antenna 4, a metal fixing piece 5, a heat conductive silica gel 6, and a plastic package housing 7; the metal fixing piece 5 is provided with a mounting groove 51; the RFID chip 1 is welded with the FPC circuit board 3; the metal antenna 4 is arranged in the FPC circuit board 3; the RFID chip 1 is insulated, packaged and protected by epoxy resin 2; the RFID chip 1 is fixed in the mounting groove 51 by using heat-conducting silica gel 6; the plastic package shell 7 fixedly packages the RFID chip 1 and the metal fixing piece 5 in a dispensing mode, and the RFID chip 1 is arranged in the plastic package shell 7; specifically, the product is attached to a battery cell or a cell interconnection plate of a new energy automobile in a sticking, dispensing, welding or other manner, when the battery cell generates heat, the heat is conducted to the heat-conducting silica gel 6 through the metal fixing piece 5, and the heat is conducted to the RFID chip 1 through the heat-conducting silica gel 6; the RFID chip 1 is a radio frequency identification electronic temperature chip, and after the RFID chip 1 detects the heat degree, a temperature data signal is sent to a battery thermal management system of the new energy automobile through a metal antenna 4 and radio frequency identification to realize the collection of the battery cell temperature of the whole automobile; the embodiment realizes wireless source acquisition of the power supply, and solves the problems that the volume, weight and cost of an acquisition wire harness of a traditional wired temperature sensor are greatly increased when the temperature of a battery cell of the whole battery module needs to be acquired, the energy storage capacity of the battery is influenced by the complex circuit layout, and the endurance mileage of a vehicle is indirectly reduced; the problem that the traditional temperature sensor cannot collect the temperature of all battery cells, so that the potential safety hazard of new energy in the battery charging and discharging process is greatly solved.

As shown in fig. 1 and fig. 2, in this embodiment, as an improvement, the metal fixing sheet 5 is made of aluminum metal or nickel, because aluminum and nickel have better thermal conductivity than iron metal, the design is easier to collect the battery cell temperature.

As shown in fig. 2 and 4, in the present embodiment, the metal antenna 4 is a metal wire, and the outer surface of the metal antenna is encapsulated by an insulating material, because radio frequency identification (rfid, also called electronic tag or rfid) is a communication technology, and can identify a specific target and read and write related data through a radio signal without establishing mechanical or optical contact between an identification system and the specific target, it is ensured that the antenna design and the rf layout are key components in a wireless system, and it is responsible for transmitting and receiving electromagnetic radiation from the air, so the rf antenna is the best metal antenna.

As shown in fig. 1 to 4, the FPC board 3 is a flexible circuit board, and the flexible circuit board ensures that the circuit board is not easily broken.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the spirit or scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wireless passive temperature sensor for mounting a battery is characterized by comprising an RFID chip (1), epoxy resin (2), an FPC (flexible printed circuit) board (3), a metal antenna (4), a metal fixing piece (5), heat-conducting silica gel (6) and a plastic package shell (7); the metal fixing piece (5) is provided with a mounting groove (51); the RFID chip (1) is welded with the FPC (flexible printed circuit) board (3); the metal antenna (4) is arranged in the FPC (flexible printed circuit) board (3); the RFID chip (1) is insulated, packaged and protected by epoxy resin (2); the RFID chip (1) is fixed in the mounting groove (51) by using heat-conducting silica gel (6); the RFID chip packaging structure is characterized in that the plastic package shell (7) fixedly packages the RFID chip (1) and the metal fixing piece (5) in a dispensing mode, and the RFID chip (1) is arranged in the plastic package shell (7).

2. The wireless passive temperature sensor for mounting battery according to claim 1, wherein the RFID chip (1) is a radio frequency identification electronic temperature chip.

3. The wireless and passive temperature sensor for mounting battery as claimed in claim 1, wherein the metal fixing sheet (5) is made of aluminum.

4. The wireless passive temperature sensor for mounting battery according to claim 1, characterized in that the metal antenna (4) is a metal wire, and the surface of the metal wire is encapsulated by an insulating material.

5. The wireless passive temperature sensor for mounting battery according to claim 1, wherein the FPC board (3) is a flexible circuit board.