CN214154864U - Battery low temperature heating circuit - Google Patents
Battery low temperature heating circuit Download PDFInfo
- Publication number
- CN214154864U CN214154864U CN202120182059.2U CN202120182059U CN214154864U CN 214154864 U CN214154864 U CN 214154864U CN 202120182059 U CN202120182059 U CN 202120182059U CN 214154864 U CN214154864 U CN 214154864U
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- battery
- operational amplifier
- heating
- temperature
- low
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to the technical field of supply circuit, concretely relates to battery low temperature heating circuit. The low-temperature battery heating circuit comprises a heating resistor, a current-limiting resistor, a thermistor, an MOS (metal oxide semiconductor) tube and an operational amplifier, wherein the operational amplifier comprises 5 pins connected with the thermistor and 1 pin connected with the MOS tube. The utility model can realize normal charging and discharging of the battery at the temperature of minus 20 ℃, namely normal emergency lighting, and meets the requirement that the battery can not leave rapidly in sudden power failure or emergency at outdoor workplaces at night in winter; when the temperature exceeds 55 ℃, the resistance value of the NTC is reduced, the voltage of a pin 5 of the operational amplifier U3 is reduced, the output of 1 of the operational amplifier U3 is low in potential, the MOS transistor Q4 is cut off, the current flowing through the heating resistor R10 is cut off, and the heating of the battery is stopped; preventing the battery from being damaged due to overheating; and dangerous things are prevented from happening.
Description
Technical Field
The utility model belongs to the technical field of supply circuit, concretely relates to battery low temperature heating circuit.
Background
At present, various emergency lamps are widely applied to places such as shopping malls, entertainment places, civil buildings and the like, and as shown in fig. 1, the whole circuit of the existing emergency power supply comprises a charging circuit, an emergency switching control circuit, a discharging circuit and a temperature control circuit; when the mains supply is electrified, the high-voltage PWM drive starts to work, the MOS tube Q1 is switched on, the transformer T2A stores energy, when the MOS tube Q1 is switched off, the energy stored by the transformer T2A is coupled to the T2B, and the T2B charges the battery after rectification by D2 and filtering by C5; when the mains supply is powered off, the grid of the Q2 obtains high potential, the Q2 is conducted, and the battery starts to discharge; at the moment, the low-voltage PWM drive starts to work, when the Q3 is switched on, the transformer T3 stores energy, the energy stored by the transformer T3 is rectified through the D4, and the emergency lamp LED is lightened after the C6 filters the energy; however, the existing emergency power supply has certain limitation, and cannot be used outdoors in cold, so that some outdoor places cannot be used for illumination emergency after power failure.
SUMMERY OF THE UTILITY MODEL
To the problem that the above-mentioned background art provided, the utility model aims at: aims to provide a low-temperature heating circuit for a battery.
In order to realize the technical purpose, the utility model discloses a technical scheme as follows:
a low-temperature battery heating circuit comprises a heating resistor, a current-limiting resistor, a thermistor, an MOS (metal oxide semiconductor) tube and an operational amplifier, wherein the operational amplifier comprises 5 pins connected with the thermistor and 1 pin connected with the MOS tube.
Further, the current limiting resistor is connected in parallel with the operational amplifier.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model can realize normal charging and discharging of the battery at the temperature of minus 20 ℃, namely normal emergency lighting, and meets the requirement that the battery can not leave rapidly in sudden power failure or emergency at outdoor workplaces at night in winter; when the temperature exceeds 55 ℃, the resistance value of the NTC is reduced, the voltage of a pin 5 of the operational amplifier U3 is reduced, the output of 1 of the operational amplifier U3 is low in potential, the MOS transistor Q4 is cut off, the current flowing through the heating resistor R10 is cut off, and the heating of the battery is stopped; preventing the battery from being damaged due to overheating; and dangerous things are prevented from happening.
Drawings
The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;
fig. 1 is a schematic circuit diagram of an embodiment of a low-temperature heating circuit for a battery according to the present invention;
fig. 2 is a circuit diagram of a low-temperature heating circuit for a battery according to the present invention;
the main element symbols are as follows:
heating resistor R10, current limiting resistor R9, thermistor NTC, MOS pipe Q4 and operational amplifier U3.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the low temperature heating circuit for battery of the present invention includes a heating resistor R10, a current limiting resistor R9, a thermistor NTC, a MOS transistor Q4 and an operational amplifier U3, wherein the operational amplifier U3 includes 5 pins connected to the thermistor NTC and 1 pin connected to the MOS transistor Q4;
the current limiting resistor R9 is connected in parallel with the operational amplifier U3.
As shown in fig. 2, a low-temperature heating circuit of the battery is connected to a power supply circuit, when the loop temperature is lower than 0, the resistance value of the NTC thermistor increases, the voltage of the pin 5 of the operational amplifier U3 increases, and according to the working principle of the operational amplifier U3, the pin 1 of the operational amplifier U3 outputs a high potential at this time, so that the gate voltage of the MOS transistor Q4 reaches the threshold voltage, the MOS transistor Q4 starts to be turned on, the current flows through the heating resistor R10, and the body of the heating resistor R10 starts to generate heat to heat the battery, so that the battery gradually recovers to 0 ℃ -55 ℃, and charging and discharging at low temperature are met; along with the heating of the heating resistor R10 body to the battery, when the temperature is higher than 55 ℃, the resistance value of the thermistor NTC becomes small, the voltage of the pin 5 of the operational amplifier U3 is reduced, the output of 1 of the operational amplifier U3 is at a low potential, the MOS transistor Q4 is cut off, the current flowing through the heating resistor R10 is cut off, and the heating of the battery is stopped; the battery is prevented from being damaged by overheating.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (2)
1. A battery low temperature heating circuit, its characterized in that: the circuit comprises a heating resistor (R10), a current limiting resistor (R9), a thermistor (NTC), a MOS (Q4) and an operational amplifier (U3), wherein the operational amplifier (U3) comprises a 5 pin connected with the thermistor (NTC) and a 1 pin connected with the MOS (Q4).
2. A battery cryogenic heating circuit according to claim 1, wherein: the current limiting resistor (R9) is connected in parallel with the operational amplifier (U3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182059.2U CN214154864U (en) | 2021-01-22 | 2021-01-22 | Battery low temperature heating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182059.2U CN214154864U (en) | 2021-01-22 | 2021-01-22 | Battery low temperature heating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154864U true CN214154864U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120182059.2U Active CN214154864U (en) | 2021-01-22 | 2021-01-22 | Battery low temperature heating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154864U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964404A (en) * | 2021-09-29 | 2022-01-21 | 河南中烟工业有限责任公司 | Heating smoking set power supply protection method based on internal temperature regulation |
-
2021
- 2021-01-22 CN CN202120182059.2U patent/CN214154864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964404A (en) * | 2021-09-29 | 2022-01-21 | 河南中烟工业有限责任公司 | Heating smoking set power supply protection method based on internal temperature regulation |
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