BATTERY HEATING CIRCUITS AND METHODS WITH RESONANCE COMPONENTS IN SERIES USING VOLTAGE INVERSION BASED ON PREDETERMINED CONDITIONS

• US 20120032642A1
• Filed: 07/20/2011
• Published: 02/09/2012
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: BYD Semiconductor Co., Ltd. (BYD Company Limited)
• Original Assignee: BYD Company Limited
• Inventors: Xu, Wenhui, Han, Yaochuan, Feng, Wei, Yang, Qinyao, Xia, Wenjin, Li, Xianyin
• Granted Patent: US 8,975,872 B2
• Time in Patent Office: Days
• US Class Current: 320/128
• CPC Class Codes: H01L 23/345 Arrangements for heating thermal treatment apparatus H01L21/00
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/651 characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
• CPC Class Codes: H01M 10/657 by electric or electromagnetic means
• CPC Class Codes: H01M 10/6571 Resistive heaters arrangements for heating the battery by its resistance to the internal current H01M10/637
• CPC Class Codes: H01M 10/6572 Peltier elements or thermoelectric devices
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0069 Charging or discharging for charge maintenance, battery initiation or rejuvenation
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: H02M 3/158 including plural semiconductor devices as final control devices for a single load
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

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, 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, and is configured to superpose the energy in the energy storage circuit with the energy in the battery when the switch unit (1) switches on and then switches off; the switching control module (100) is also configured to control the switch unit (1) to switch off after the first positive half cycle of current flow through the switch unit (1) after the switch unit (1) switches on, and the voltage applied to the switch unit (1) at the time the switch unit (1) switches off is lower than the voltage rating of the switch unit (1).

Claims

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping component R1, an energy storage circuit, 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, and is configured to superpose the energy in the energy storage circuit with the energy in the battery when the switch unit (1) switches on and then switches off;

the switching control module (100) is also configured to control the switch unit (1) to switch off after the first positive half cycle of the current flow through the switch unit (1) after the switch unit (1) switches on, and the voltage applied to the switch unit (1) at the time the switch unit (1) switches off is lower than the voltage rating of the switch unit (1).

2. The heating circuit according to claim 1, wherein:

the damping component R1 is the parasitic resistance in the battery, and the current storage component L1 is the parasitic inductance in the battery.

3. The heating circuit according to claim 1, wherein:

the damping component R1 is a resistor, the current storage component L1 is an inductor, and the charge storage component C1 is a capacitor.

4. The heating circuit according to claim 3, wherein:

the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is configured to invert the voltage polarity of the charge storage component C1 after the switch unit (1) switches on and then switches off.

5. The heating circuit according to claim 4, wherein:

the polarity inversion unit (102) comprises a single-pole double-throw switch J1 and a single-pole double-throw switch J2 located on the two ends of the charge storage component C1 respectively;

the input wires of the single-pole double-throw switch J1 are connected in the energy storage circuit, the first output wire of the single-pole double-throw switch J1 is connected with the first pole plate of the charge storage component C1, and the second output wire of the single-pole double-throw switch J1 is connected with the second pole plate of the charge storage component C1;

the input wires of the single-pole double-throw switch J2 are connected in the energy storage circuit, the first output wire of the single-pole double-throw switch J2 is connected with the second pole plate of the charge storage component C1, and the second output wire of the single-pole double-throw switch J2 is connected with the first pole plate of the charge storage component C1;

the switching control module (100) is also connected with the single-pole double-throw switch J1 and single-pole double-throw switch J2 respectively, and is configured to invert the voltage polarity of the charge storage component C1 by altering the connection relationships between the respective input wires and output wires of the single-pole double-throw switch J1 and the single-pole double-throw switch J2.

6. The heating circuit according to claim 4, wherein:

the polarity inversion unit (102) comprises a one-way semiconductor component D3, a current storage component L2, and a switch K9;

the charge storage component C1, current storage component L2, and switch K9 are connected sequentially in series to form a loop;

the one-way semiconductor component D3 is connected in series between the charge storage component C1 and the current storage component L2 or between the current storage component L2 and the switch K9;

the switching control module (100) is also connected with the switch K9, and is configured to invert the voltage polarity of the charge storage component C1 by controlling the switch K9 to switch on.

7. The heating circuit according to claim 4, wherein:

the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage component C2;

the first DC-DC module (2) is connected with the charge storage component C1 and the charge storage component C2 respectively;

the switching control module (100) is also connected with the first DC-DC module (2), and is configured to transfer the energy in the charge storage component C1 to the charge storage component C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage component C2 back to the charge storage component C1, so as to invert the voltage polarity of the charge storage component C1.

8. The heating circuit according to claim 1, wherein:

the switch unit (1) is a two-way switch K3.

9. The heating circuit according to claim 1, wherein:

the switch unit (1) comprises a first one-way branch configured to enable energy flow from the battery to the energy storage circuit and a second one-way branch configured to enable energy flow from the energy storage circuit to the battery;

the switching control module (100) is connected to the first one-way branch and the second one-way branch, respectively, and is configured to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

10. The heating circuit according to claim 9, wherein:

the switch unit (1) comprises a two-way switch K4 and a two-way switch K5, the two-way switch K4 and the two-way switch K5 are connected in series opposite to each other to form the first one-way branch and the second one-way branch;

the switching control module (100) is connected with the two-way switch K4 and two-way switch K5 respectively, and is configured to control ON/OFF of the first one-way branch and the second one-way branch by controlling ON/OFF of the two-way switch K4 and two-way switch K5.

11. The heating circuit according to claim 9, wherein:

the switch unit (1) comprises a switch K6, a one-way semiconductor component D11, a switch K7, and a one-way semiconductor component D12, the switch K6 and the one-way semiconductor component D11 are connected with each other in series to constitute the first one-way branch;

the switch K7 and the one-way semiconductor component D12 are connected in series with each other to constitute the second one-way branch;

the switching control module (100) is connected with the switch K6 and the switch K7, and is configured to control ON/OFF of the first one-way branch and the second one-way branch by controlling ON/OFF of the switch K6 and the switch K7.

12. The heating circuit according to claim 9, wherein:

the switch unit (1) further comprises a resistor connected in series with the first one-way branch and/or the second one-way branch.

13. The heating circuit according to claim 1, wherein:

the switching control module (100) is configured to control the switch unit (1) to switch off when the current flow through the switch unit (1) reaches zero after the peak value in the negative half cycle after the switch unit (1) switches on.

14. The heating circuit according to claim 1, further comprising a freewheeling circuit (20), which is configured to form a serial loop with the battery and the current storage component L1 to sustain the current flow in the battery after the switch unit (1) switches on and then switches off.

15. The heating circuit according to claim 14, wherein:

the freewheeling circuit (20) comprises a switch K20 and a one-way semiconductor component D20 connected in series with each other;

the switching control module (100) is connected with the switch K20, and is configured to control the switch K20 to switch on after the switch unit (1) switches on and then switches off, and control the switch K20 to switch off when the current flow to the battery reaches a preset value of current.

16. The heating circuit according to claim 14, wherein:

the freewheeling circuit (20) comprises a one-way semiconductor component D21, a damping component R21, and a charge storage component C21;

the one-way semiconductor component D21 and the damping component R21 are connected in parallel with each other, and then connected in series with the charge storage component C21.

17. The heating circuit according to claim 1, wherein:

the heating circuit further comprises an energy consumption unit, which is connected with the charge storage component C1 and configured to consume the energy in the charge storage component C1 after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition.

18. The heating circuit according to claim 17, wherein:

the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage component C1, and is configured to convert the voltage across the charge storage component C1 to a predetermined voltage value after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition.

19. The heating circuit according to claim 18, wherein:

the voltage control unit (101) comprises a damping component R5 and a switch K8, the damping component R5 and the switch K8 are connected with each other in series, and then connected in parallel across the charge storage component C1;

the switching control module (100) is also connected with the switch K8, and is configured to control the switch K8 to switch on after the switch unit (1) switches on and then switches off.