Storage battery discharging instrument and discharging current regulating method thereof
A discharge current and battery technology, applied in the field of discharge current regulation and battery discharger, can solve the problems of increased labor intensity, inaccurate measurement, performance degradation, etc., to improve accuracy and precision, avoid large errors, control The effect of circuit simplification
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Embodiment 1
[0028] A storage battery discharge instrument, comprising a discharge unit 4 and a set current unit 2 connected to the discharge unit 4 , an automatic adjustment unit 3 is arranged between the set current unit 2 and the discharge unit 4 . The discharge unit 4 includes 8 sub-discharge units 1 connected in parallel, and each sub-discharge unit 1 includes 8 GTR transistors connected in series, and the base of each GTR transistor is connected in series with a resistor R b , by adopting the resistance Rb to improve the current balance degree of the generator electrode; each sub-discharge unit 1 is provided with a preamplifier module and a resistor R connected in series with the preamplifier module d , the pre-amplifier module can use the simplest amplifier tube, or a conventional pre-amplifier circuit, by selecting the amplification factor of the sub-discharge unit and the pre-amplifier tube, or the sub-discharge unit and the pre-amplifier circuit, so that The total current of each...
Embodiment 2
[0031] The difference between this embodiment and the first embodiment lies in that the eight sub-discharge units 1 connected in parallel are packaged with a temperature sensor and a radiator respectively, and are controlled by the same controller. It can effectively improve heat dissipation efficiency, avoid unnecessary heat dissipation, keep each sub-discharge unit at a relatively constant temperature, ensure stable performance of each sub-discharge unit, and reduce current deviation.
Embodiment 4
[0033] A method for automatically regulating the discharge current of the battery discharge instrument in the above embodiment, comprising the following steps:
[0034] a) Set the discharge current through the setting current unit 2 in advance to obtain the set discharge current I r ;
[0035] b) During discharge detection, the automatic adjustment unit 3 obtains the actual discharge current I of the storage battery through the shunt SH fd ;
[0036] c) The operational amplifier module of the automatic adjustment unit 3 compares the actual discharge current I fd with the set discharge current I r the size of:
[0037] When I fd = I r , the operational amplifier module does not output;
[0038] When I fd > I r , the operational amplifier module outputs an adjusted current signal that reduces the current to the preamplifier module;
[0039] When I fd r , the operational amplifier module outputs an adjusted current signal that increases the current to the preamplifier ...
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