CN213752824U - Heating system supporting failure self-checking and double-circuit control - Google Patents
Heating system supporting failure self-checking and double-circuit control Download PDFInfo
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- CN213752824U CN213752824U CN202022446118.0U CN202022446118U CN213752824U CN 213752824 U CN213752824 U CN 213752824U CN 202022446118 U CN202022446118 U CN 202022446118U CN 213752824 U CN213752824 U CN 213752824U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a heating system supporting failure self-checking and double-circuit control, which comprises at least one external power supply for supplying power to the heating system, a heating device for heating a component to be heated and a detection device for detecting the temperature of the heating device in real time; the temperature detection device also comprises an information processing module used for processing the temperature detected by the detection device, an AD/DA module used for converting the detected analog signal into a digital signal which can be processed by the information processing module and converting the processed digital signal into a corresponding analog signal, and a control switch used for controlling the heating loop to be opened and closed under the control of the corresponding analog signal; the number of the control switches is two. The utility model aims at overcoming the defect that prior art exists, provide a heating system who supports inefficacy self-checking and double-circuit control.
Description
Technical Field
The utility model relates to a communication base station battery or automobile power battery's heating system especially relates to a heating system who supports inefficacy self-checking and double-circuit control.
Background
At present, most of energy systems of communication base stations and automobile power battery systems adopt lithium ion battery packs with good comprehensive performance, wherein a heating system is an important component of the lithium ion battery packs. The heating system is mainly used for enabling the temperature of a lithium ion storage battery pack in an energy system of a communication base station or a power battery system of an automobile to rise to a proper working temperature through heat generated by the heating system under a low-temperature environment, so that the power supply performance of the storage battery pack in the low-temperature environment can meet the use requirement. However, when the heating device in the heating system fails, the existing heating system control method cannot safely, effectively and quickly respond to and solve the problem of failure of the heating device, so that the heating device is easily overheated to cause thermal runaway.
Disclosure of Invention
The utility model aims at overcoming the defect that prior art exists, provide a heating system who supports inefficacy self-checking and double-circuit control.
Realize the utility model discloses the technical scheme of purpose is: a heating system supporting failure self-checking and double-circuit control comprises at least one external power supply for supplying power to the heating system, a heating device for heating a component to be heated and a detection device for detecting the temperature of the heating device in real time; the temperature detection device also comprises an information processing module used for processing the temperature detected by the detection device, an AD/DA module used for converting the detected analog signal into a digital signal which can be processed by the information processing module and converting the processed digital signal into a corresponding analog signal, and a control switch used for controlling the heating loop to be opened and closed under the control of the corresponding analog signal; the number of the control switches is two.
Further, the heating device is connected to the heating circuit through an insert.
Further, the detection device is a negative temperature coefficient thermistor.
Further, two of the control switches are connected in series in the heating circuit.
Further, the two control switches are CMOS analog switches.
Further, the failure probability of a single control switch is P; the probability of normal disconnection of a single control switch is 1-P, wherein P is more than 0 and less than 1;
further, the probability of the normal disconnection of the two control switches is 1-P2。
After the technical scheme is adopted, the utility model discloses following positive effect has: the external power supply supplies power for the heating device, the temperature of the heating device is detected in real time through the thermistor with the negative temperature coefficient, the AD module converts detected analog signals into digital signals and transmits the digital signals to the information processing module, the information processing module forms the digital signals through processing information, and the digital signals are converted into corresponding analog signals through the DA module and used for controlling the on and off of the switch. Wherein two control switches are connected in series in the heating loop for two-way control. According to the mode, under the condition that the heating device fails, the heating loop can be effectively disconnected, thermal runaway caused by overheating of the heater is prevented, and the reliability and the safety level of control of the heating loop are improved.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Referring to fig. 1, the utility model comprises at least one external power supply (P + to PF-) for supplying power to the heating system, a heating device H1 for heating the part to be heated, and a detecting device NTC7 for detecting the temperature of the heating device H1 in real time; the external power supply (P + to PF-) can be a direct current power supply; the temperature detection device further comprises an information processing module used for processing the temperature detected by the NTC7, an AD/DA module used for converting the detected analog signal into a digital signal which can be processed by the information processing module and converting the processed digital signal into a corresponding analog signal, and a control switch used for controlling the heating circuit to be opened and closed under the control of the corresponding analog signal; the two control switches are Q3 and Q4.
The heating device H1 is connected into the heating loop through a plug-in, and under the condition that the heating loop is closed, an external power supply (P < + > PF < - >) continuously supplies power to the heating device H1 to generate heat.
The detection device NTC7 is a thermistor with negative temperature coefficient, the thermistor with negative temperature coefficient is tightly attached to the heating device H1 to detect the surface temperature of the heating device, the resistance value of the thermistor can be changed due to external temperature change, and the current temperature of the heating device H1 can be obtained through the temperature-resistance value curve of the thermistor and the resistance value detected in real time; when the temperature of the heating device H1 exceeds a preset threshold value, judging that the heating device H1 is failed, and forming a failure signal by detecting an analog signal formed by the resistance value of the NTC7 detection device during failure; the failure signal conversion is carried out, the AD module is used for converting the detected analog signal into a digital signal which can be processed by the information processing module, and the signal processing module is used for comparing the acquired temperature signal with a preset value to obtain the conclusion that the heating device H1 fails; and generating a control signal, converting a digital signal obtained by comparison and analysis of the signal processing module into a corresponding analog signal to control the control switches Q3 and Q4, and then sending a disconnection instruction to both the two control switches Q3 and Q4 connected in series to disconnect the heating loop and stop the heating system.
Two of the control switches Q3 and Q4 are connected in series in the heating circuit.
The two control switches Q3 and Q4 are CMOS analog switches each having three terminals, input, output, and control, wherein the input and output terminals are interchangeable. When the control end is in high level, the switch is conducted; the switch is turned off when the control terminal is applied with a low level. When the analog switch is switched on, the on-resistance is dozens of ohms; when the analog switch is turned off, the analog switch presents very high impedance and can be regarded as an open circuit. The two switches are connected in series in the loop, and the whole loop can be disconnected as long as any one of the switches is disconnected, so that the work of devices on the loop is stopped. The advantage of this method over a single switch loop is a higher level of reliability and safety.
The failure probability of a single control switch is P; the probability of normal disconnection of a single control switch is 1-P, wherein P is more than 0 and less than 1;
the probability of the two control switches Q3 and Q4 being normally switched off is 1-P2(ii) a And a single switch loop, when the heating device H1 overheats, the loop is required to be opened to stop supplying power to the heating device H1, once the switch fails and cannot be opened, the whole loop is closed all the time, the heating device H1 works all the time and generates heat, and finally temperature runaway can be caused. If the failure probability of a single switch is P (P is more than 0 and less than 1), the probability that the single switch loop can be normally disconnected is 1-P, and the probability that the double switch loop can be normally disconnected is 1-P2. Obtaining 1-P according to P is more than 0 and less than 12If the voltage is more than 1-P, the probability of the normal disconnection of the double switches is greater than that of the single switch, and the reliability and the safety level of the control of the heating circuit are improved.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A heating system supporting failure self-checking and double-circuit control comprises at least one external power supply for supplying power to the heating system, a heating device for heating a component to be heated and a detection device for detecting the temperature of the heating device in real time; the method is characterized in that: the temperature detection device also comprises an information processing module used for processing the temperature detected by the detection device, an AD/DA module used for converting the detected analog signal into a digital signal which can be processed by the information processing module and converting the processed digital signal into a corresponding analog signal, and a control switch used for controlling the heating loop to be opened and closed under the control of the corresponding analog signal; the number of the control switches is two.
2. A heating system supporting self-test for failure and two-way control as claimed in claim 1, wherein: the heating device is connected to the heating loop through the plug-in.
3. A heating system supporting self-test for failure and two-way control as claimed in claim 1, wherein: the detection device is a thermistor with a negative temperature coefficient.
4. A heating system supporting self-test for failure and two-way control as claimed in claim 1, wherein: two of the control switches are connected in series in the heating circuit.
5. A heating system supporting self-failure detection and two-way control as claimed in any one of claims 1 to 4, wherein: the two control switches are CMOS analog switches.
6. A heating system supporting self-test for failure and two-way control as claimed in claim 5, wherein: the failure probability of a single control switch is P; the probability of normal disconnection of a single control switch is 1-P, wherein P is more than 0 and less than 1.
7. A heating system supporting self-test for failure and two-way control as claimed in claim 6, wherein: the probability of the normal disconnection of the two control switches is 1-P2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022446118.0U CN213752824U (en) | 2020-10-28 | 2020-10-28 | Heating system supporting failure self-checking and double-circuit control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022446118.0U CN213752824U (en) | 2020-10-28 | 2020-10-28 | Heating system supporting failure self-checking and double-circuit control |
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| Publication Number | Publication Date |
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| CN213752824U true CN213752824U (en) | 2021-07-20 |
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| CN202022446118.0U Active CN213752824U (en) | 2020-10-28 | 2020-10-28 | Heating system supporting failure self-checking and double-circuit control |
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| CN (1) | CN213752824U (en) |
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- 2020-10-28 CN CN202022446118.0U patent/CN213752824U/en active Active
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