Super-low power consumption lithium battery management unit, parallel application system and parallel operation method

Abstract

The invention relates to a super-low power consumption lithium battery management unit, a parallel application system and a parallel operation method. The management unit comprises a battery voltage collection module, a microprocessor MCU, a discharging MOS module and a charging MOS module; the microprocessor MCU receives a current signal of a shunt, a power supply signal of a DC-DC power supply module, and a battery state signal and a charging-discharging signal transferred by a CAN communication module; the parallel application and operation method of the battery management unit are as follows: by virtue of control of an ON/OFF control module and by virtue of matching of the charging MOS module and the discharging MOS module, infinite capacity expansion of the same voltage platform is realized, extremely low static state power consumption is realized, the problem of mutual charging and discharging between battery modules in parallel application is solved, one-key starting and automatic interconnection and self inspection in parallel application are realized, and operation and application in parallel connection become convenient; and product application is directly performed in aparallel connection manner by taking the standard battery module as the basis, without needing a peripheral circuit or module.

Description

technical field [0001] The invention relates to the technical field of production and application of lithium batteries, in particular to an ultra-low power consumption lithium battery management unit, a parallel application system and a parallel working method. Background technique [0002] At present, lithium batteries are widely used in many industrial products. Lithium batteries have been widely used in portable electrical appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. The developed large-capacity lithium-ion batteries have been widely used in electric vehicles. With the shortage of energy and the pressure of environmental protection in the world, more and more products will use lithium batteries. [0003] In the stage of converting lead-acid batteries to lithium batteries, the demand for modular design to realize the expansion of module capacity at will is becoming more and more obvious. The current solution on ...

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Problems solved by technology

[0003] In the stage of converting lead-acid batteries to lithium batteries, the demand for modular design to realize the expansion of module capacity at will is becoming more and more obvious. The current solution on the market is that the design of lithium battery modules is based on the capacity required by customers. Most Using a combination of hardware or software and hardware, the battery modules are directly connected in parallel, but it cannot meet the requirements of preventing the batteries from charging and discharging each other and realizing low power consumption when the battery is not in use. ; The current design of lithium battery modules cannot be used in random parallel connection, which limits the use of modular design and narrow application range

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