Switch control device and method, motor controller and battery pack heating control system

Abstract

The invention discloses a switch control device and method, a motor controller and a battery pack heating control system, and relates to the field of battery power. The switch control device includes: a processing module, which is used for switching the switch control cycle from the previous cycle to the current cycle, and switching the upper bridge arm switches from the three-phase bridge arms except the target upper bridge arm switch module of the previous cycle Select the target upper bridge arm switch module of the current period from the module, and / or select the target lower bridge arm switch module of the current period from other lower bridge arm switch modules of the three-phase bridge arm except the target lower bridge arm switch module of the previous period The bridge arm switch module; the processing module is also used for: controlling the on-off of the target upper bridge arm switch module and the target lower bridge arm switch module in each switch control cycle. The switch control device and method, motor controller and battery pack heating control system provided by the embodiments of the present invention can improve the safety of battery pack heating.

Description

technical field [0001] The invention relates to the field of battery power, in particular to a switch control device and method, a motor controller and a battery pack heating control system. Background technique [0002] With the development of new energy, more and more fields use new energy as power. Due to the advantages of high energy density, rechargeable, safe and environmentally friendly, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields. [0003] However, the use of batteries in low temperature environments will be limited. Specifically, the discharge capacity of the battery will seriously decline in a low temperature environment, and the battery cannot be charged in a low temperature environment. Therefore, in order to use the battery normally, it is necessary to heat the battery in a low temperature environment. [0004] At this stage, the electrochemical substances inside the battery can be excited by...

AI Technical Summary

Problems solved by technology

When the switching module of the inverter in the battery heating system is periodically turned on to control the periodic storage and discharge of the energy storage module of the motor in the battery heating system, an AC current is generated in the circuit where the battery pack is located to heat the battery pack At this time, the temperature of the switch module in the inverter and the energy storage module in the motor may be too high due to the large amount of heat generated.

The overheating of the above-mentioned devices will affect the safety of the battery pack heating

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