Passive battery temperature testing device based on radio frequency identification

Abstract

The embodiment of the utility model provides a passive battery temperature testing device based on radio frequency identification. The passive battery temperature testing device comprises a signal measuring module and a reader-writer module, the signal measuring module comprises a temperature sensor, a stress sensor, a first memory for storing vehicle information and battery information, a first signal receiving and transmitting module, a first RFID antenna and a first shell; the temperature sensor, the stress sensor and the first memory are connected with the first signal transceiver module, and the first signal transceiver module is connected with the first RFID antenna. By means of the battery protection method and device, when the vehicle breaks down or has an accident and a low-voltage system cannot supply power, the battery temperature can be obtained through the passive battery temperature testing device, the battery state is judged according to the battery temperature, safety protection of the battery is improved, and therefore the battery safety performance of the electric vehicle is improved.

Description

Technical Field

[0001] This application relates to the technical field of temperature rise detection, and specifically relates to a passive temperature testing system for electric vehicle batteries based on radio frequency identification. Background Art

[0002] The electric vehicle battery is equipped with a complex thermal management system, and the thermal management of the battery is realized through the thermal management system. Among them, temperature testing is the basis of thermal management. Thermal resistance temperature sensors are set between the battery cells inside the battery module and at the inlet and outlet positions of the battery cooling system. The cell temperature and the operating temperature of the thermal management system are obtained by setting the sensors. The temperature measurement principle of the thermal resistance temperature sensor is based on the characteristic that the resistance value of a conductor or semiconductor changes with temperature to achieve temperature measurement. Among them, the acquisition of temperature data depends on the relationship between resistance, current, and voltage. Since thermal resistance temperature measurement is an active temperature measurement and depends on the power supply of the low-voltage battery of the electric vehicle, when the low-voltage system of the electric vehicle cannot supply power, the battery temperature measurement system fails, so temperature data cannot be measured, and thus the battery state cannot be judged. In addition, when a fault or accident occurs in the electric vehicle, the battery temperature rise law is an important data basis for battery safety protection. When temperature change data cannot be obtained, the battery safety protection cannot be improved based on the temperature rise law, and thus effective escape time data cannot be obtained.

[0003] Therefore, based on years of experience and practice in the relevant industry, the inventor proposes a passive battery temperature testing device based on radio frequency identification to overcome the defects of the prior art. Summary of the Utility Model

[0004] Aiming at the problems in the prior art, this application provides a passive battery temperature testing device based on radio frequency identification. Through this passive battery temperature testing device, the temperature data of the electric vehicle can be collected and transmitted quickly and accurately, and the battery temperature rise law can be processed and analyzed based on the temperature data to realize the safety protection of the electric vehicle battery and improve the battery safety of the electric vehicle.

[0005] To achieve the above object, the present utility model is realized through the following technical solutions: A passive battery temperature testing device based on radio frequency identification, comprising: a signal measurement module and a reader-writer module; the signal measurement module includes: a temperature sensor, a stress sensor, a first memory for storing vehicle information and battery information, a first signal transceiver module, a first RFID antenna, and is within a first housing; the temperature sensor, the stress sensor, and the first memory are connected to the first signal transceiver module, and the first signal transceiver module is connected to the first RFID antenna; the reader-writer module includes: a second RFID antenna, a second signal transceiver module, a communication module, and a second housing; the second signal transceiver module is connected to the second RFID antenna; when the first RFID antenna is close to the second RFID antenna, it receives electromagnetic wave energy from the second RFID antenna to provide electrical energy for the signal measurement module; the signal measurement module is arranged in the battery pack, and the reader-writer module is arranged inside the lamp post or underground.

[0006] Preferably, the first housing includes: a first base, on which the temperature sensor, the stress sensor, the first memory for storing vehicle information and battery information, the first signal transceiver module, and the first RFID antenna are arranged; a first encapsulation shell, which is connected to the base by snap-fit.

[0007] Preferably, the second housing includes: a second base, on which the second RFID antenna, the second signal transceiver module, a comparator, and a communication module are arranged; a second encapsulation shell, which is connected to the base by snap-fit; the reader-writer module is arranged underground.

[0008] Preferably, the second housing includes: a third base, on which the second RFID antenna, the second signal transceiver module, a comparator, and a communication module are arranged; a third encapsulation shell, which is connected to the base by snap-fit; a fourth encapsulation shell, which is connected to the base by snap-fit; the reader-writer module is arranged inside the lamp post. [[ID=**10**]] [[ID=**11**]]

[0009] [[ID=**12**]]Preferably, the first encapsulation shell is an elastic housing. [[ID=**13**]] [[ID=**14**]]

[0010] [[ID=**15**]]Preferably, the second encapsulation shell is an elastic housing. [[ID=**16**]] [[ID=**17**]]

[0011] [[ID=**18**]]Preferably, the third encapsulation shell and the fourth encapsulation shell are elastic housings. [[ID=**19**]] [[ID=**20**]]

[0012] [[ID=**21**]]Preferably, the signal measurement module further includes: a signal processing module for filtering, compensating, and amplifying the temperature signal and the stress signal, which is connected to the temperature sensor and the stress sensor. [[ID=**22**]] [[ID=**23**]]

[0013] [[ID=**24**]]Preferably, the signal processing module includes: a filter circuit, a compensation bridge, and an amplifier. [[ID=**25**]]

[0014] Preferably, the communication module is connected to an upper computer.

[0015] The utility model provides a passive battery temperature testing device based on radio frequency identification, which has the following beneficial effects:

[0016] 1. The passive battery temperature testing device includes a signal measurement module and a reader-writer module. The reader-writer module is arranged inside the lamp post or buried underground to form an information network, facilitating the sharing of vehicle information, battery information, and temperature data.

[0017] 2. The first memory contains basic vehicle information and battery information, such as vehicle identification number, license plate number, battery pack specification model and parameters, etc., to improve the accuracy of the reader-writer module in identifying vehicle information, battery information, and temperature data.

[0018] 3. The signal measurement module is arranged inside the battery pack or between battery cells, and one or more can be placed according to requirements to improve the accuracy of measuring the temperature of the electric vehicle battery.

[0019] When a failure or accident occurs to an electric vehicle, resulting in the inability of the low-voltage power supply to supply power, the passive battery temperature testing device can normally collect and transmit the temperature data of the electric vehicle, facilitating the upper computer to process and analyze the battery temperature rise law based on the temperature data to judge the battery state, thereby realizing the safety protection of the electric vehicle battery and improving the battery safety performance of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the passive battery temperature testing device based on radio frequency identification of the present application;

[0022] Figure 2 It is a schematic structural diagram of the signal measurement module of the present utility model;

[0023] Figure 3 It is one of the schematic structural diagrams of the reader-writer module of the present utility model;

[0024] Figure 4 It is one of the schematic structural diagrams of the reader-writer module of the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0025] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0028] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above-mentioned terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will detail the present application with reference to the drawings and in combination with the embodiments.

[0031] To solve the problem that when an electric vehicle has an accident or a fault, due to the power-off of the detection device circuit, the active battery temperature test device fails, and thus the battery temperature detection cannot be completed, the present application provides an embodiment of a passive battery temperature test device based on radio frequency identification.

[0032] As Figure 1 shown, the present utility model provides a technical solution: a passive battery temperature test device based on radio frequency identification includes a signal measurement module 10 and a reader-writer module 11.

[0033] The signal measurement module 10 is arranged in the battery pack of the electric vehicle, and the reader-writer module 11 is arranged inside the lamp post or underground.

[0034] Specifically, the signal measurement module 10 is arranged inside the battery pack. If there are multiple battery cells inside the battery pack, the signal measurement module 10 is arranged between the battery cells inside the battery pack, and multiple signal measurement modules 10 can be arranged inside the battery pack according to the needs of those skilled in the art.

[0035] The reader-writer module 11 can be arranged inside the lamp post, such as inside the lamp posts of street lamps, traffic lights, etc.; the reader-writer module 11 can also be arranged underground, such as in the roadbed or side ditch, etc., and is powered by the municipal circuit or battery. Multiple reader-writer modules 11 form an information network, and the data collected by the reader-writer module 11 can be sent to the server side for storage through a wired or wireless communication network for the use of management departments or other institutions.

[0036] The signal measurement module 10 includes: a first memory 101 for storing vehicle information and battery information, a stress sensor 102, a temperature sensor 103, a first signal transceiver module 105, and a first RFID antenna 106. The first memory 101, the stress sensor 102, and the temperature sensor 103 are connected to the first signal transceiver module 105.

[0037] Specifically, the first memory 101 contains vehicle information and battery information. Among them, the vehicle information includes the vehicle identification number, license plate number, etc.; the battery information includes the battery pack specifications, battery pack models, and battery pack parameters, etc.

[0038] The reader-writer module 11 includes: a second RFID antenna 110, a second signal transceiver module 111, a communication module 112, a data processing module 113, and a second memory 114.

[0039] When the first RFID antenna 106 is close to the second RFID antenna 110, the first RFID antenna 106 can receive electromagnetic wave energy from the second RFID antenna 110 to supply power to the signal measurement module 10.

[0040] Specifically, when the signal measurement module 10 is close to the reader / writer module 11, the first RFID antenna 106 of the signal measurement module 10 automatically receives the electromagnetic wave energy transmitted by the second RFID antenna 110 of the reader / writer module 11. The signal measurement module 10 converts the electromagnetic wave energy into electrical energy to activate the chip and circuit of the signal measurement module 10, and sends the vehicle information and battery information in the first memory 101 to the reader / writer module 11.

[0041] The first signal transceiver module 105 is connected to the first RFID antenna 106. The second signal transceiver module 111 is connected to the second RFID antenna 110. When the first RFID antenna 106 is close to the second RFID antenna 110, the first signal transceiver module 105 is used to send the vehicle information and battery information stored in the first memory 101 to the reader / writer module 11 through the first RFID antenna 106. The reader / writer module 11 receives the vehicle information and battery information sent by the first RFID antenna 106 through the second RFID antenna 110 and sends them to the second signal transceiver module 111.

[0042] The second signal transceiver module 111 is connected to the data processing module 113. The second signal transceiver module 111 sends the above vehicle information and battery information to the data processing module 113. The data processing module 113 is respectively connected to the communication module 112 and the second memory 114. The data processing module 113 identifies and classifies the received vehicle information and battery information, and sends the processed vehicle information and battery information to the communication module 112 and the second memory 114 respectively.

[0043] In one embodiment, the data processing module 113 includes an information identification module and a comparator 303. The information identification module is used to identify and classify the vehicle information and battery information. The second memory 114 is used to store the vehicle information and battery information processed by the data processing module 113.

[0044] The communication module 112 is connected to the host computer. The communication module 112 is used to send the processed vehicle information and battery information to the host computer for the manufacturer or management department to use the management system.

[0045] The signal measurement module 10 further includes a signal processing module 104 for filtering, compensating, and amplifying the temperature signal and the stress signal, which is connected to the stress sensor 102 and the temperature sensor 103. Among them, the signal processing module 104 includes a filtering circuit, a compensating bridge, and an amplifier. The filtering circuit can be an LC filter, a low-pass filter, a band-pass filter, a high-pass filter, etc.; the compensating bridge can be a digital AC-DC bridge (such as QJ57B-1A type), etc., and the amplifier can be a wireless router signal amplifier or a wireless signal amplifier, etc., and no specific limitation is made in this embodiment.

[0046] Specifically, the stress sensor 102 and the temperature sensor 103 are connected to the signal processing module 104. When the electric vehicle has an accident or receives a severe impact, the stress sensor 102 is used to measure the pressure received by the signal measurement module 10, and the temperature sensor 103 is used to measure the battery temperature of the electric vehicle in real time.

[0047] After the vehicle information and battery information of the first memory 101 are transmitted to the reader-writer module 11, both the temperature signal measured by the temperature sensor 103 and the stress signal measured by the stress sensor 102 are digitally processed by the signal processing module 104. Among them, the signal processing module 104 filters, compensates, and amplifies the temperature signal and the stress signal through the filtering circuit, the compensating bridge, and the amplifier, and converts the temperature signal and the stress signal into digital signals respectively. Among them, the digital signals include temperature information and stress information.

[0048] After the digital signal processing is completed, the signal processing module 104 sends the digital signal to the reader-writer module 11 through the first signal transceiver module 105 and the first RFID antenna 106. The reader-writer module 11 receives the above digital signal through the second RFID antenna 110 and the second signal transceiver module 111, and sends the digital signal to the data processing module 113 for data processing. The data processing module 113 performs identification and classification through the information identification module, and compares the temperature information and the stress information with the preset thresholds respectively through the comparator 303. Among them, the preset thresholds are the preset temperature threshold and the preset stress threshold, and the comparator can be a comparator of the ADCMP561 series model or a comparator of the LM series model, etc., and no specific limitation is made in this embodiment.

[0049] The data processing module 113 sends the processed digital signals to the second memory 114 and the communication module 112 respectively. Among them, the second memory 114 stores the above temperature information and stress information, and the communication module 112 sends the above temperature information and stress information to the upper computer for use by the manufacturer or the management department to manage the system.

[0050] When the comparator 303 detects abnormal temperature information or stress information, that is, when the temperature information or stress information exceeds the preset threshold, an alarm signal is sent to the host computer. The host computer sends the alarm signal to the manufacturer, the traffic management department, and the fire department for emergency handling.

[0051] In the embodiment of the present invention, after the signal measurement module 10 approaches the reader module 11, the signal measurement module 10 first sends vehicle information and battery information to the reader module 11, and then sends temperature information and stress information to the reader module 11 to sequentially transmit the above information until the signal measurement module 10 moves away from the reader module 11. Since the signal measurement module 10 does not require power supply, when the low-voltage power supply of the electric vehicle cannot supply power, the signal measurement module 10 can still be normally activated by the reader device to collect and transmit temperature data. The reader device judges the battery state according to the received temperature data, and obtains the temperature rise law according to the change data of the battery temperature state, so as to improve the safety protection of the electric vehicle battery and thus improve the battery safety of the electric vehicle.

[0052] The signal measurement module 10 further includes a first housing 20. Specifically, as Figure 2 shown, the first housing 20 includes: a first base 201, a first memory 101, a stress sensor 102, a temperature sensor 103, a signal processing module 104, a first signal transceiver module 105, a first RFID antenna 106, and a first encapsulation shell 202.

[0053] The first memory 101, the stress sensor 102, the temperature sensor 103, the signal processing module 104, the first signal transceiver module 105, and the first RFID antenna 106 are arranged on the first base 201. The first encapsulation shell 202 is connected to the first base 201 by snap-fit. Among them, the first encapsulation shell 202 is an elastic housing, and the shape of the first encapsulation shell 202 can be semi-circular or semi-elliptical, and no specific limitation is made in this embodiment.

[0054] The reader module 11 further includes a second housing 30. Specifically, as Figure 3 shown, when the reader module 11 is arranged underground, the second housing 30 includes: a second base 301, a second RFID antenna 110, a second signal transceiver module 111, a comparator 303, a communication module 112, and a second encapsulation shell 302.

[0055] The second RFID antenna 110, the second signal transceiver module 111, the comparator 303, and the communication module 112 are arranged on the second base 301. The second encapsulation shell 302 is connected to the second base 301 by snap-fit. Among them, the second encapsulation shell 302 is an elastic housing, and the shape of the second encapsulation shell 302 can be semi-circular or semi-elliptical, and no specific limitation is made in this embodiment.

[0056] As Figure 4 shown, when the reader / writer module 11 is disposed inside the lamp post, the second housing 30 includes: a third base 401, a second RFID antenna 110, a second signal transceiver module 111, a comparator 303, a communication module 112, a third encapsulation case 402, and a fourth encapsulation case 403.

[0057] The second RFID antenna 110, the second signal transceiver module 111, the comparator 303, and the communication module 112 are disposed on the third base 401. The third encapsulation case 402 and the third base 401 are connected by snap-fit. The fourth encapsulation case 403 and the third base 401 are connected by snap-fit. Among them, the third encapsulation case 402 and the fourth encapsulation case 403 are elastic housings, and the shapes of the third encapsulation case 402 and the fourth encapsulation case 403 can be semi-circular or semi-elliptical, and no specific limitation is made in this embodiment.

[0058] In the embodiment of the present utility model, the housing of the signal measurement module 10 is made into an elastic housing to facilitate the setting of the signal measurement module 10 between the battery cells in the battery pack. By making the housing of the reader / writer module 11 into an elastic housing, it is convenient to dispose the reader / writer module 11 inside the lamp post or underground.

[0059] The above are only the schematic specific embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A passive battery temperature testing device based on radio frequency identification, characterized in that The device includes: a signal measurement module and a reader / writer module; The signal measurement module includes: a temperature sensor, a stress sensor, a first memory for storing vehicle information and battery information, a first signal transceiver module, a first RFID antenna, and is within a first housing; the temperature sensor, the stress sensor, and the first memory are connected to the first signal transceiver module, and the first signal transceiver module is connected to the first RFID antenna; The reader / writer module includes: a second RFID antenna, a second signal transceiver module, a communication module, and a second housing; the second signal transceiver module is connected to the second RFID antenna; When the first RFID antenna is close to the second RFID antenna, it receives electromagnetic wave energy from the second RFID antenna to provide electrical energy for the signal measurement module; the signal measurement module is arranged in the battery pack, and the reader / writer module is arranged inside the lamp post or underground.

2. The passive battery temperature testing device according to claim 1, characterized in that, The first housing includes: A first base, on which the temperature sensor, the stress sensor, the first memory for storing vehicle information and battery information, the first signal transceiver module, and the first RFID antenna are arranged; A first encapsulation shell, which is connected to the base by snap-fit.

3. The passive battery temperature testing device according to claim 1, characterized in that, The second housing includes: A second base, on which the second RFID antenna, the second signal transceiver module, a comparator, and the communication module are arranged; A second encapsulation shell, which is connected to the base by snap-fit; The reader / writer module is arranged underground.

4. The passive battery temperature testing device according to claim 1, wherein, The second housing includes: A third base, on which the second RFID antenna, the second signal transceiver module, a comparator, and the communication module are arranged; A third encapsulation shell, which is connected to the base by snap-fit; A fourth encapsulation shell, which is connected to the base by snap-fit; The reader / writer module is arranged inside the lamp post.

5. The passive battery temperature testing device according to claim 2, wherein The first encapsulation shell is an elastic housing.

6. The passive battery temperature testing device according to claim 3, wherein, The second encapsulation shell is an elastic housing.

7. The passive battery temperature testing device according to claim 4, characterized in that, The third encapsulation shell and the fourth encapsulation shell are elastic housings.

8. The passive battery temperature testing device according to claim 1, characterized in that, The signal measurement module further includes: a signal processing module for filtering, compensating, and amplifying the temperature signal and the stress signal, which is connected to the temperature sensor and the stress sensor.

9. The passive battery temperature testing device according to claim 8, characterized in that, The signal processing module includes: a filter circuit, a compensation bridge, and an amplifier.

10. The passive battery temperature testing device according to claim 1, wherein, The communication module is connected to a host computer.

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