Battery heating circuits and methods using voltage inversion and freewheeling circuit components
First Claim
1. A circuit for heating a battery, the circuit comprising:
- the 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, the battery including a positive battery terminal and a negative battery terminal;
a switch unit;
a switching control component coupled to the switch unit;
a first charge storage component; and
an energy superposition unit connected across the first charge storage component;
a freewheeling circuit connected between the positive battery terminal and the negative battery terminal;
wherein;
the first damping component, the first current storage component, the switch unit, and the first charge storage component are connected to form at least a part of a loop;
the switching control component is configured to turn on the switch unit so as to allow a first current flowing from the battery to the first charge storage component and a second current flowing from the first charge storage component to the battery, and to turn off the switch unit;
the energy superposition unit is configured to, after the switch unit is turned on and then turned off, adjust a storage voltage associated with the first charge storage component so that a positive voltage terminal of the first charge storage component is coupled, directly or indirectly, to the negative voltage terminal of the battery; and
the freewheeling circuit configured to allow a freewheeling current to flow to the battery after the switch unit is turned on and then turned off;
wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery.
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Accused Products
Abstract
Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit 1, a switching control module 100, a damping component R1, an energy storage circuit, a freewheeling circuit 20, and an energy superposition unit; the energy storage circuit is configured to connect with the battery to form a loop, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, the switch unit 1, the current storage component L1, and the charge storage component C1 are connected in series; the switching control module 100 is connected with the switch unit 1, and is configured to control ON/OFF of the switch unit 1, so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition unit is connected with the energy storage circuit.
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Citations
20 Claims
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1. A circuit for heating a battery, the circuit comprising:
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the 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, the battery including a positive battery terminal and a negative battery terminal; a switch unit; a switching control component coupled to the switch unit; a first charge storage component; and an energy superposition unit connected across the first charge storage component; a freewheeling circuit connected between the positive battery terminal and the negative battery terminal; wherein; the first damping component, the first current storage component, the switch unit, and the first charge storage component are connected to form at least a part of a loop; the switching control component is configured to turn on the switch unit so as to allow a first current flowing from the battery to the first charge storage component and a second current flowing from the first charge storage component to the battery, and to turn off the switch unit; the energy superposition unit is configured to, after the switch unit is turned on and then turned off, adjust a storage voltage associated with the first charge storage component so that a positive voltage terminal of the first charge storage component is coupled, directly or indirectly, to the negative voltage terminal of the battery; and the freewheeling circuit configured to allow a freewheeling current to flow to the battery after the switch unit is turned on and then turned off; wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20)
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12. A circuit for heating a battery, the circuit comprising:
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the 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, the battery including a first battery terminal and a second battery terminal; a switch unit; a switching control component 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; and an energy superposition unit coupled to the first charge storage component; a freewheeling circuit connected between the first battery terminal and the second battery terminal; wherein; the first damping component, the first current storage component, the switch unit, and the first charge storage component are connected in series; the switching control component is configured to turn on and off the switch unit so as to control a first current flowing between the battery and the first charge storage component; the energy superposition unit is configured to, after the switch unit is turned on and then turned off, adjust a storage voltage associated with the first charge storage component so that a positive voltage terminal of the first charge storage component is coupled, directly or indirectly, to a negative voltage terminal of the battery; and the freewheeling circuit configured to allow a freewheeling current to flow to the battery after the switch unit is turned on and then turned off; wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery; wherein the switch unit includes a first branch circuit for conduction in a first direction and a second branch circuit for conduction in a second direction, the first direction being from the positive voltage terminal of the battery to the first charge storage component, the second direction being from the first charge storage component to the battery; wherein the switching control component is coupled to the first branch circuit and the second branch circuit and configured to turn on and off the first branch circuit and the second branch circuit respectively;
wherein;the first branch circuit includes a first switch and a first one-way semiconductor component connected in series with the first switch, the first switch being coupled to the switching control component; and the second branch circuit includes a second switch and a second one-way semiconductor component connected in series with the second switch, the second switch being coupled to the switching control component; wherein the switching control component is configured to; turn on and off the first branch circuit by turning on and off the first switch respectively; and turn on and off the second branch circuit by turning on and off the second switch respectively.
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Specification