CIRCUITS AND METHODS FOR HEATING BATTERIES IN SERIES USING RESONANCE COMPONENTS IN SERIES

• US 20120025756A1
• Filed: 07/22/2011
• Published: 02/02/2012
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: BYD Semiconductor Co., Ltd. (BYD Company Limited)
• Original Assignee: BYD Company Limited
• Inventors: Feng, Wei, Yang, Qinyao, Xu, Wenhui, Han, Yaochuan, Xia, Wenjin, Ma, Shibin
• Granted Patent: US 8,823,317 B2
• Time in Patent Office: Days
• US Class Current: 320/103
• 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, wherein: the battery comprises a first battery (E1) and a second battery (E2), the heating circuit comprises a first switch unit (10), a second switch unit (20), a damping component R1, a damping component R2, a current storage component L1, a current storage component L2, a switching control module (100) and a charge storage component C, the first battery, damping component R1, current storage component L1, first switch unit (10) and charge storage component C are connected in series to form a first charging/discharging circuit; the second battery (E2), damping component R2, current storage component L2, charge storage component C and second switch unit (20) are connected in series to form a second charging/discharging circuit; when the charge storage component C is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is reverse to the direction of charging/discharging current in the first charging/discharging circuit; the switching control module (100) is electrically connected with the first switch unit (10) and second switch unit (20), and is configured to control the electric energy flow between the first battery (E1), charge storage component C and second battery (E2). The battery heating circuit of certain embodiments of the present invention can achieve high heating efficiency.

Claims

1. A battery heating circuit, wherein:

the battery comprises a first battery (E1) and a second battery (E2), the heating circuit comprises a first switch unit (10), a second switch unit (20), a damping component R1, a damping component R2, a current storage component L1, a current storage component L2, a switching control module (100) and a charge storage component C,

the first battery (E1), the damping component R1, the current storage component L1, the first switch unit (10) and the charge storage component C are connected in series to form a first charging/discharging circuit;

the second battery (E2), the damping component R2, the current storage component L2, the charge storage component C and the second switch unit (20) are connected in series to form a second charging/discharging circuit;

when the charge storage component C is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is reverse to the direction of charging/discharging current in the first charging/discharging circuit;

the switching control module (100) is electrically connected with the first switch unit (10) and the second switch unit (20), and the switching control module (100) is configured to control the first switch unit (10) and the second switch unit (20) to switch on in alternate, so as to control the electric energy flow among the first battery (E1), the charge storage component C and the second battery (E2).

2. The battery heating circuit according to claim 1, wherein the damping component R1 and the damping component R2 are the parasitic resistances in the first battery (E1) and the second battery (E2) respectively, the current storage component L1 and the current storage component L2 are the parasitic inductances in the first battery (E1) and the second battery (E2) respectively, and the charge storage component C is a capacitor.

3. The battery heating circuit according to claim 1, wherein the heating circuit further comprises a current storage component L10 and a current storage component L20, wherein:

the current storage component L10 is connected in series in the first charging/discharging circuit, and the current storage component L20 is connected in series in the second charging/discharging circuit.

4. The battery heating circuit according to claim 3, wherein the current storage component L10 and current storage component L20 are inductors.

5. The battery heating circuit according to claim 1, wherein the heating circuit further comprises a current storage component L10, a current storage component L20, a one-way semiconductor component D1, a one-way semiconductor component D2, a one-way semiconductor component D10 and a one-way semiconductor component D20, wherein:

the one-way semiconductor component D10 is connected in series with the first switch unit (10), the one-way semiconductor component D1 and the current storage component L10 connected in series with each other are connected in parallel between the ends of the one-way semiconductor component D10 and the first switch unit (10) connected in series with each other, so as to limit the current in the first charging/discharging circuit in reverse direction; and

,

the one-way semiconductor component D20 is connected in series with the second switch unit (20), and the current storage component L20 and one-way semiconductor component D2 connected in series with each other are connected in parallel between the ends of the one-way semiconductor component D20 and the second switch unit (20) connected in series with each other, so as to limit the current in the second charging/discharging circuit in reverse direction.

6. The battery heating circuit according to claim 5, wherein the current storage component L10 and current storage component L20 are inductors.

7. The battery heating circuit according to claim 1, wherein the first switch unit (10) and/or the second switch unit (20) comprise a switch K11 and a one-way semiconductor component D11 connected in parallel with the switch K11 in reverse direction, and the switching control module (100) is electrically connected with the switch K11, and the switching control module (100) is configured to control ON/OFF of the forward direction branches of the first switch unit (10) and/or the second switch unit (20) by controlling ON/OFF of the switch K11.

8. The battery heating circuit according to claim 7, wherein when or after the current flowing through the first switch unit (10) or the second switch unit (20) reaches zero, the switching control module (100) is configured to control the first switch unit (10) or the second switch unit (20) to switch off respectively.