Passive wireless temperature sensor system and method for measuring temperature in battery

Abstract

The invention discloses a passive wireless temperature sensor system and method for measuring the temperature inside a battery, and in the passive wireless temperature sensor system for measuring the temperature inside the battery, a passive wireless temperature sensor is embedded inside the battery. The LC oscillating circuit receives an external radio frequency signal to generate an induced current so as to drive the passive wireless temperature sensor to measure the temperature to obtain temperature data, and the antenna structure wirelessly transmits the temperature data; the radio frequency signal transmitter is arranged outside the battery to transmit a radio frequency signal to the passive wireless temperature sensor; the data receiver is arranged outside the battery and is wirelessly connected with the antenna structure to receive the temperature data; and the battery management system is connected with the data receiver and the battery so as to perform early warning and control according to a preset threshold value based on the temperature data.

Description

Technical Field

[0001] The invention relates to the technical field of battery internal temperature measurement, and in particular to a passive wireless temperature sensor system and method for battery internal temperature measurement. Background Art

[0002] With the rapid development of electric vehicles, energy storage systems and other fields, battery safety and performance have become key factors restricting their development. Accurate monitoring of the internal temperature of the battery is of great significance for preventing thermal runaway and extending battery life. Traditional wired temperature sensors have problems such as complex wiring, easy damage, and difficult maintenance.

[0003] The information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0004] In view of the shortcomings or defects of the above-mentioned prior art, a passive wireless temperature sensor system and method for measuring the temperature inside a battery are provided, which does not require external power supply and can wirelessly transmit the temperature data inside the battery to achieve real-time monitoring and early warning, thereby improving the safety and service life of the battery.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A passive wireless temperature sensor system for measuring the internal temperature of a battery comprises:

[0007] A passive wireless temperature sensor is embedded in the battery. The passive wireless temperature sensor includes:

[0008] The LC oscillator circuit receives an external radio frequency signal to generate an induced current to drive the passive wireless temperature sensor to measure the temperature and obtain temperature data.

[0009] an antenna structure that wirelessly transmits the temperature data;

[0010] A radio frequency signal transmitter, which is arranged outside the battery to transmit a radio frequency signal to the passive wireless temperature sensor;

[0011] a data receiver disposed outside the battery to wirelessly connect to the antenna structure to receive the temperature data;

[0012] A battery management system is connected to the data receiver and the battery to perform early warning and control according to a preset threshold value based on the temperature data.

[0013] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the passive wireless temperature sensor is embedded in the diaphragm of the battery.

[0014] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the battery is a lithium-ion battery.

[0015] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the lithium-ion battery is a square battery or a cylindrical battery.

[0016] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the passive wireless temperature sensor is a flexible structure.

[0017] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the data receiver includes a processing unit for processing the temperature data and a display unit for displaying the temperature data.

[0018] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the processing unit includes a single chip microcomputer or a CPU.

[0019] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the display unit includes a liquid crystal screen.

[0020] In the passive wireless temperature sensor system for measuring the temperature inside a battery, the liquid crystal screen includes a touch screen.

[0021] The temperature measurement method of the passive wireless temperature sensor system for measuring the internal temperature of the battery includes:

[0022] Embed a passive wireless temperature sensor inside the battery;

[0023] Start the radio frequency signal transmitter to transmit the radio frequency signal to the passive wireless temperature sensor inside the battery;

[0024] After receiving the radio frequency signal, the passive wireless temperature sensor generates an induced current, which drives the temperature sensor to measure the temperature;

[0025] After the temperature measurement is completed, the passive wireless temperature sensor sends the temperature data wirelessly;

[0026] The data receiver receives the temperature data, processes it and displays it;

[0027] The battery management system performs early warning and control based on the received temperature data.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention does not require external power supply, reducing the complexity and cost of the system. The wireless transmission method avoids the problems of complex wiring and easy damage, and improves the reliability and stability of the system. Real-time monitoring of the internal temperature of the battery helps to prevent thermal runaway and extend the battery life. Integration with the battery management system realizes intelligent management and control.

[0030] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and to achieve the extent that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0032] In the attached picture:

[0033] Figure 1 The figure is a schematic diagram of the structure of a passive wireless temperature sensor system for measuring the internal temperature of a battery according to an embodiment of the present invention.

[0034] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0036] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the attached claims.

[0037] To facilitate understanding of the embodiments of the present invention, several specific embodiments will be further explained below with reference to the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0038] For a better understanding, Figure 1 As shown, a passive wireless temperature sensor system for measuring the internal temperature of a battery includes:

[0039] A passive wireless temperature sensor is embedded in the battery. The passive wireless temperature sensor includes:

[0040] The LC oscillator circuit receives an external radio frequency signal to generate an induced current to drive the passive wireless temperature sensor to measure the temperature and obtain temperature data.

[0041] an antenna structure that wirelessly transmits the temperature data;

[0042] A radio frequency signal transmitter, which is arranged outside the battery to transmit a radio frequency signal to the passive wireless temperature sensor;

[0043] a data receiver disposed outside the battery to wirelessly connect to the antenna structure to receive the temperature data;

[0044] A battery management system is connected to the data receiver and the battery to perform early warning and control according to a preset threshold value based on the temperature data.

[0045] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the passive wireless temperature sensor is embedded in a diaphragm of the battery.

[0046] In a preferred embodiment of the passive wireless temperature sensor system for measuring the temperature inside a battery, the battery is a lithium-ion battery.

[0047] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the lithium-ion battery is a square battery or a cylindrical battery.

[0048] In a preferred embodiment of the passive wireless temperature sensor system for measuring the temperature inside a battery, the passive wireless temperature sensor is a flexible structure.

[0049] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the data receiver includes a processing unit for processing the temperature data and a display unit for displaying the temperature data.

[0050] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the processing unit includes a single chip microcomputer or a CPU.

[0051] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the display unit comprises a liquid crystal screen.

[0052] In a preferred embodiment of the passive wireless temperature sensor system for measuring the internal temperature of a battery, the liquid crystal screen includes a touch screen.

[0053] The temperature measurement method of the passive wireless temperature sensor system for measuring the internal temperature of the battery includes:

[0054] Embed a passive wireless temperature sensor inside the battery;

[0055] Start the radio frequency signal transmitter to transmit the radio frequency signal to the passive wireless temperature sensor inside the battery;

[0056] After receiving the radio frequency signal, the passive wireless temperature sensor generates an induced current, which drives the temperature sensor to measure the temperature;

[0057] After the temperature measurement is completed, the passive wireless temperature sensor sends the temperature data wirelessly;

[0058] The data receiver receives the temperature data, processes it and displays it;

[0059] The battery management system performs early warning and control based on the received temperature data.

[0060] In one embodiment, a passive wireless temperature sensor system for measuring the internal temperature of a battery includes:

[0061] Passive wireless temperature sensor: This sensor is embedded in the battery and uses an LC oscillation circuit and antenna structure. It generates an induced current by receiving an external RF signal, which drives the temperature sensor to measure the temperature and sends the temperature data wirelessly.

[0062] RF signal transmitter: used to transmit RF signals to the passive wireless temperature sensor inside the battery to activate the sensor for temperature measurement;

[0063] Data receiver: used to receive temperature data sent by the passive wireless temperature sensor, and process and display it;

[0064] Battery Management System (BMS): Connected to the data receiver to receive temperature data and provide early warning and control based on preset thresholds.

[0065] Furthermore, the present invention also provides a temperature measurement method of a passive wireless temperature sensor for measuring the temperature inside a battery, comprising the following steps:

[0066] The passive wireless temperature sensor is embedded inside the battery to ensure that the sensor is in full contact with the internal environment of the battery.

[0067] The radio frequency signal transmitter is started to transmit a radio frequency signal to the passive wireless temperature sensor inside the battery.

[0068] After receiving the radio frequency signal, the passive wireless temperature sensor generates an induced current, which drives the temperature sensor to measure the temperature.

[0069] After the temperature measurement is completed, the passive wireless temperature sensor sends the temperature data wirelessly.

[0070] The data receiver receives the temperature data, processes it and displays it.

[0071] The battery management system performs early warning and control based on the received temperature data.

[0072] In one embodiment, the passive wireless temperature sensor uses an LC oscillation circuit and an antenna structure to generate an induced current by receiving a radio frequency signal, thereby driving the temperature sensor to measure temperature. The radio frequency signal transmitter and the data receiver both communicate with the passive wireless temperature sensor via wireless communication.

[0073] In one embodiment, the RF signal transmitter and the data receiver are integrated together. Further, the RF signal transmitter and the data receiver are integrated in a battery management system (BMS).

[0074] In one embodiment, the battery management system is provided with an early warning unit, which includes a buzzer or an LED light.

[0075] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A passive wireless temperature sensor system for measuring the temperature inside a battery, characterized in that: These include, A passive wireless temperature sensor is embedded in the battery. The passive wireless temperature sensor includes: The LC oscillator circuit receives an external radio frequency signal to generate an induced current to drive the passive wireless temperature sensor to measure the temperature and obtain temperature data. an antenna structure that wirelessly transmits the temperature data; A radio frequency signal transmitter, which is arranged outside the battery to transmit a radio frequency signal to the passive wireless temperature sensor; a data receiver disposed outside the battery to wirelessly connect to the antenna structure to receive the temperature data; A battery management system is connected to the data receiver and the battery to perform early warning and control according to a preset threshold value based on the temperature data.

2. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 1, characterized in that: Preferably, the passive wireless temperature sensor is embedded in the diaphragm of the battery.

3. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 1, characterized in that: The battery is a lithium-ion battery.

4. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 3, characterized in that: Lithium-ion batteries are either square or cylindrical.

5. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 1, characterized in that: The passive wireless temperature sensor is a flexible structure.

6. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 1, characterized in that: The data receiver includes a processing unit that processes the temperature data and a display unit that displays the temperature data.

7. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 6, characterized in that: The processing unit includes a single chip microcomputer or a CPU.

8. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 6, characterized in that: The display unit includes a liquid crystal screen.

9. The passive wireless temperature sensor system for measuring the internal temperature of a battery as claimed in claim 8, characterized in that: The LCD screen includes a touch screen.

10. The temperature measurement method of the passive wireless temperature sensor system for measuring the internal temperature of a battery according to any one of claims 1 to 9.

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