此应用程序的某些内容目前无法使用。
如果这种情况持续存在,请联系我们反馈与联系
1. (WO2018067218) METHOD TO REUSE THE PULSE DISCHARGE ENERGY DURING LI-ION FAST CHARGING FOR BETTER POWER FLOW EFFICIENCY
注:相关文本通过自动光符识别流程生成。凡涉及法律问题,请以 PDF 版本为准

CLAIMS

We claim:

1. A battery charger for charging a battery with voltage from an input supply, the battery charger comprising:

a power path to drive the battery during a pulse charging sequence in a first mode and to reverse power flow from the battery when operating in a boost mode during the pulse charging sequence; and

an energy storage component coupled to the power path to capture pulse discharge energy during the pulse charging sequence when the circuit stage is operating in the boost mode.

2. The battery charger defined in Claim 1 wherein the energy storage component comprises a capacitor.

3. The battery charger defined in Claim 2 wherein the capacitor is an input capacitor operable to isolate and provide decoupling to the input supply when the input supply is coupled to the battery charger.

4. The battery charger defined in Claim 1 wherein the power path comprises a step down stage operable to convert an input voltage from the input supply to a battery voltage level, the step down stage operable in the boost mode during discharge pulsing of the pulse charging sequence to reverse the power flow to be from the battery.

5. The battery charger defined in Claim 4 wherein the step down stage comprises a pair of transistor that are controlled to change their switching pattern during the discharge pulsing to allow the energy storage component to be charged with the pulse discharge energy.

6. The battery charger defined in Claim 4 wherein the step down stage is operable to continue in boost mode until charge on the energy storage component reaches a threshold or discharge pulsing has completed.

7. The battery charger defined in Claim 6 wherein the energy storage component comprises a capacitor, and further comprising a monitor circuit to monitor voltage collected by the capacitor for determining is the capacitor has reached the threshold.

8. The battery charger defined in Claim 4 further comprising a step up stage coupled to the step down stage to form a buck-boost charger power stage.

9. A battery charger for charging a battery with voltage from an input supply, the battery charger comprising:

one or more circuit stages coupled together to operate as a buck converter and a reverse boost converter at different times of a pulse charging sequence, the one or more circuit stages to operate as the buck converter when the battery is being charged with a charge pulse during the pulse charging sequence and to operate as a reverse boost converter to draw current from the battery as part of pulse discharging during the pulse charging sequence; and

an energy storage component coupled to the circuit stage to capture pulse discharge energy while pulse discharging during the pulse charging sequence when the circuit stage is operating as a reverse boost converter.

10. The battery charger defined in Claim 9 wherein the energy storage component comprises a capacitor.

11. The battery charger defined in Claim 10 wherein the capacitor is an input capacitor operable to isolate and provide decoupling to the input supply when the input supply is coupled to the battery charger.

12. The battery charger defined in Claim 9 wherein the step down stage is operable to convert an input voltage from the input supply to a battery voltage level and comprises a pair of transistor that are controlled to change their switching pattern during the discharge pulsing to allow the energy storage component to be charged with the pulse discharge energy.

13. The battery charger defined in Claim 12 wherein the step down stage is operable as a reverse boost converter during the pulse charging sequence until charge on the energy storage component reaches a threshold or discharge pulsing has completed.

14. The battery charger defined in Claim 13 wherein the energy storage component comprises a capacitor, and further comprising a monitor circuit to monitor voltage collected by the capacitor for determining is the capacitor has reached the threshold.

15. The battery charger defined in Claim 14 wherein the threshold comprises a maximum allowed charge level for the energy storage component.

16. The battery charger defined in Claim 9 further comprising a switch for coupling the input supply to the energy storage component, the switch being turned off when the one or more circuit stages operate as the reverse boost converter.

17. A computer system comprising:

a battery; and

a battery charger as defined in any one of Claims 9-16.

18. A method for charging a battery with a battery charger, the method comprising: reversing power flow through a battery charger to produce discharge pulse energy during a pulse charging sequence, including drawing current from the battery;

capturing pulse discharge energy with an energy storage component while pulse discharging during the pulse charging sequence, the energy storage comprising an input

capacitor operable to isolate and provide decoupling to an input supply using to provide voltage for charging the battery; and

producing charge pulse energy during the pulse charging sequence.

19. The method defined in Claim 18 wherein the charge pulse energy is produced by a buck converter and the discharge pulse energy is produced by a reverse boost converter, and the buck converter and reverse boost converter are implemented with a step down circuit stage or with step down and step up circuit stages.

20. The method defined in Claim 18 further comprising charging the energy storage component with the discharge pulse energy until a charge level on the energy storage component reaches a threshold or discharge pulsing of the pulse charging sequence has completed.