Battery constant-current charging and discharging circuit
A charge-discharge circuit and battery technology, applied in the electronic field, can solve problems such as shortening battery life and lack of precision control, and achieve the effects of improving battery life and utilization, avoiding physical damage to batteries, and realizing linear intelligent current regulation
Pending Publication Date: 2022-07-12
四川钧力能源科技有限公司
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Problems solved by technology
[0002] In the specific application scenarios of new energy batteries, it is inevitable to charge and discharge the battery to complete the mutual conversion of electric energy and chemical energy. The traditional design of charging is mainly to charge with a large current and constant current first, and to use constant voltage charging near the end. However, during the entire charging and discharging process, there is usually only current-limiting and voltage-limiting detection, and no further precision control is performed. In the charging and discharging process of lithium battery cells, if the current can be controlled more accurately, the service life of the battery cells can be greatly extended. The existing initial high current charging will shorten the battery life
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[0013] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0014] The battery constant current charge and discharge circuit of the present invention includes a power tube connected between the negative electrode of the battery and the ground, a first resistor R1 is also connected between the negative electrode of the battery and the output end of the power tube, and the first resistor is connected to the power tube M1 The common terminal is the feedback terminal connected to the non-inverting input terminal of the operational amplifier U1, the inverting input terminal of the operational amplifier is connected to the output terminal of the digital-to-analog converter, the input terminal of the digital-to-analog converter is connected to the controller, the output terminal of the operational amplifier and the The inverting input end of the operational amplifier is connected, the output end of t...
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A battery constant-current charging and discharging circuit comprises a power tube connected between a battery negative electrode and the ground, a first resistor is further connected between the battery negative electrode and the power tube, a common end of the first resistor and the power tube is a feedback end and is connected with a positive-phase input end of an operational amplifier, and an inverted-phase input end of the operational amplifier is connected with an output end of a digital-to-analog converter. The input end of the digital-to-analog converter is connected with the controller, the output end of the operational amplifier is connected with the inverted input end of the operational amplifier, and the output end of the operational amplifier is connected with the control end of the power tube. By the adoption of the battery charging constant current technology, physical damage to a battery cell caused by continuous large current to battery charging in the early charging process of the battery is avoided, the service life of the battery cell can be prolonged, the utilization rate of the battery cell can be increased, and linear intelligent current adjustment within a large range can be achieved through the variable reference voltage.
Description
technical field [0001] The invention belongs to the technical field of electronics, relates to a lithium battery charging and discharging technology, and in particular relates to a battery constant current charging and discharging circuit. Background technique [0002] In the specific application scenarios of new energy batteries, it is inevitable to charge and discharge the battery to complete the conversion of electrical energy and chemical energy. The traditional design of charging is mainly to charge with a large current and constant current, and use constant voltage charging when approaching the end stage. However, during the entire charging and discharging process, only current and voltage limiting detection is usually performed, and no further precision control is performed. However, during the charging and discharging process of lithium battery cells, if the current can be controlled more accurately, the service life of the battery cells can be greatly extended, while...
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Patent Timeline
Login to View More IPC IPC(8): H02J7/00
CPCH02J7/007H02J7/00714H02J7/00716H02J7/0029H02J7/0068H02J7/00304Y02E60/10
Inventor 万君
Owner 四川钧力能源科技有限公司