High-precision low-cost storage battery autonomous temperature control circuit
A temperature control circuit, battery technology, applied in battery temperature control, circuit, temperature control and other directions, can solve problems such as increasing development costs
Inactive Publication Date: 2021-09-03
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology
However, for some small stand-alone machines, separately configuring the lower machine to control the battery temperature will greatly increase the development cost
Method used
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[0042] For circuit connections see figure 1 , R q1 , R q2 , R q3 The equivalent resistance of the composed series-parallel network must be greater than R x2 . The thermistor chooses MF501 with a negative temperature coefficient, and the resistance R f1 , R f2 The value is 10kohm, R f3 , R f4 , R f5 The values are respectively 0ohm, 51kohm, 7.5kohm, R c1 , R c2 Respectively 16kohm, 36kohm, R x1 , R x2 100ohm, R q1 , R q2 , R q3 Respectively 0ohm, 0ohm, 1kohm, R q4 It is 100kohm and the capacitance is 0.5uf.
[0043] By selecting the above resistor and capacitor values, the following effects can be achieved:
[0044] When the output of the comparator is low, the diode D 1 due. At this time, the equivalent circuit seen from the input terminal of the circuit is as follows figure 2 shown. Let the temperature decrease gradually. When the temperature decreases to less than 0.5°C, the output port of the comparator switches to a high level, and the diode D 1 co...
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A high-precision low-cost storage battery autonomous temperature control circuit comprises a hysteresis comparator, a thermistor, a temperature control lower threshold debugging circuit, a temperature control upper threshold debugging circuit and a heating control circuit. The thermistor converts the temperature of the storage battery into a voltage signal and is connected with the positive input end of the hysteresis comparator; and the temperature control lower threshold debugging circuit used for calibrating the temperature control lower limit threshold voltage of the storage battery is connected to the reverse input end of the hysteresis comparator, and the output end of the hysteresis comparator is connected with the heating control circuit through the temperature control upper threshold debugging circuit used for calibrating the temperature control upper limit threshold voltage of the storage battery. When the temperature of the storage battery is lower than the temperature control lower limit threshold voltage, the level of the positive input end of the hysteresis comparator rises, an effective level is output to the heating control circuit, and the heating control circuit heats the storage battery; and when the temperature of the storage battery is higher than the temperature control upper limit threshold voltage, the output of the hysteresis comparator is invalid, and the heating control circuit stops heating the storage battery.
Description
technical field [0001] The invention belongs to the technical field of space power supplies, and in particular relates to an autonomous temperature control circuit for a lithium-ion storage battery used in spacecraft. Background technique [0002] The performance of lithium-ion batteries is greatly affected by temperature. In order to ensure stable charging and discharging capabilities during the working period, it is generally necessary to precisely control the temperature in engineering. [0003] In the spacecraft, the lower computer is generally used to collect the temperature signal of the battery, and based on this, an instruction to control the power on and off of the heating belt is issued. However, for some small stand-alone machines, configuring a lower computer for controlling the temperature of the storage battery will greatly increase the development cost. Contents of the invention [0004] The technical problem solved by the present invention is to overcome t...
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IPC IPC(8): G05D23/24H01M10/42H01M10/615H01M10/62H01M10/637
CPCG05D23/24H01M10/425H01M10/615H01M10/62H01M10/637Y02E60/10
Inventor 杨依衡王嘉靖毕林杰汪嵩王君召谢霞明
Owner SHANGHAI INST OF SPACE POWER SOURCES