Battery heating circuits and methods using resonance components in series based on current limiting and voltage inversion with bi-directionality

A circuit for heating a battery, the circuit comprising:nthe battery including a first damping component and a first current storage component, the first damping component and the first current storage component being parasitic to the battery;a switch unit;a switching control module coupled to the switch unit;a first charge storage component, the first charge storage component and the first current storage component being at least parts of an energy storage circuit;an energy limiting circuit coupled to the switch unit; andan energy control unit coupled to the first charge storage component;wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery and charging the battery;wherein:nthe first damping component, the first current storage component, the switch unit, and the first charge storage component are connected in series;the switching control module is configured to turn on the switch unit and allow a current to flow back-and-forth between the battery and the first charge storage component;the energy limiting circuit is configured to limit the current flowing from the first charge storage component to the battery; andthe energy control unit is configured to control energy stored in the first charge storage component after the switch unit is turned on and then turned off.

A circuit for heating a battery, the circuit comprising:nthe battery including a first damping component and a first current storage component, the first damping component and the first current storage component being parasitic to the battery;a switch unit coupled to the battery and including a first switch;a first charge storage component coupled to the battery;an energy control unit coupled to the first charge storage component; anda switching control module coupled to the switch unit and the energy control unit;wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery and charging the battery;wherein the switching control module is configured to:nturn on the first switch, for at least a first period of time, to discharge the battery and charge the first charge storage component, with a first current, through at least the first switch; andallow discharging the first charge storage component and charging the battery with a second current for at least a second period of time, the second period of time being after the first period of time;wherein the energy control unit is configured to adjust a storage voltage associated with the first charge storage component during a third period of time, the third period of time being after the second period of time.

A circuit for heating a battery, the circuit comprising:nthe battery including a first resistor and a first inductor, the first resistor and the first inductor being parasitic to the battery;a switch unit coupled to the battery and including a first switch;a first capacitor coupled to the battery;an energy control unit coupled to the first capacitor; anda switching control module coupled to the switch unit and the energy control unit;wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery and charging the battery;wherein the switching control module is configured to:nturn on the first switch, for at least a first period of time, to discharge the battery and charge the first capacitor, with a first current, through at least the first switch; andallow discharging the first capacitor and charging the battery with a second current for at least a second period of time, the second period of time being after the first period of time;wherein the energy control unit is configured to adjust a capacitor voltage associated with the first capacitor during a third period of time, the third period of time being after the second period of time.