Battery heating circuits and methods using resonance components in series based on charge balancing

• US 9,087,806 B2
• Filed: 07/19/2011
• Issued: 07/21/2015
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: BYD Semiconductor Co., Ltd.
• Original Assignee: BYD Company Limited
• Inventors: Xu, Wenhui, Han, Yaochuan, Feng, Wei, Yang, Qinyao, Xia, Wenjin, Ma, Shibin
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): Zhou, Zixuan
• Application Number:
  US13/185,756
• Publication Number:
  US 20120025754A1
• Time in Patent Office: 1,463 Days
• Field of Search: 320/139, 320/128, 320/150, 320/153
• US Class Current: 1/1
• 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

Under one aspect, a heating circuit for at least a first battery and a second battery includes a first charging/discharging circuit, which is connected to the first battery, and a second charging/discharging circuit, which is connected to the second battery. The first charging/discharging circuit includes a first damping component, a first current storage component, a first switch unit, and a charge storage component, all of which are connected in a first loop with each other. The second charging/discharging circuit includes a second damping component, a second current storage component, a second switch unit, and the charge storage component, all of which are connected in a second loop with each other.

Claims

1. A heating circuit for at least a first battery and a second battery, wherein the heating circuit comprises:

a first charging/discharging circuit, which is connected to the first battery, and comprises a first damping component, a first current storage component, a first switch unit, and a first charge storage component, all of which are connected in a first loop with each other; and

a second charging/discharging circuit, which is connected to the second battery, and comprises a second damping component, a second current storage component, a second switch unit, and the first charge storage component, all of which are connected in a second loop with each other,

wherein the first switch unit comprises a first one-way branch configured to transfer energy from the first battery to the first charging/discharging circuit and a second one-way branch configured to transfer energy from the first charging/discharging circuit to the first battery and/or wherein the second switch unit comprises a third one-way branch configured to transfer energy from the second battery to the second charging/discharging circuit and a fourth one-way branch configured to transfer energy from the second charging/discharging unit to the second battery; and

wherein the first switch unit comprises a first two-way switch and a second two-way switch, which are connected in series opposite to each other to form the first one-way branch and the second one-way branch and/or wherein the second switch unit comprises a third two-way switch and a fourth two-way switch, which are connected in series opposite to each other to form the third one-way branch and the fourth one-way branch.

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

the first damping component and the second damping component are parasitic resistances in the first battery and the second battery respectively; and

the first current storage component and the second current storage component are parasitic inductances in the first battery and the second battery respectively.

3. The heating circuit according to claim 1, further comprising a switching control module, which is connected with the first switch unit and the second switch unit, wherein the switching control module is configured to control ON/OFF of the first switch unit and the second switch unit, so that energy flows back-and-forth between the first battery and the first charging/discharging circuit and/or flows back-and-forth between the second battery and the second charging/discharging circuit when the first switch unit and/or the second switch unit switch(es) on.

4. The heating circuit according to claim 1, further comprising a switching control module, which is connected with the first switch unit and the second switch unit, wherein the switching control module is configured to:

control the first switch unit to switch on and control the second switch unit to switch off so that the first battery charges the first charge storage component, when an electric quantity in the first battery is more than an electric quantity in the second battery; and

then, to control the first switch unit to switch off and control the second switch unit to switch on so that the first charge storage component charges back an electric quantity stored in it into the second battery, when a current flowing through the first charging/discharging circuit reaches zero after a positive half cycle.

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

the first switch unit includes a first two-way switch and/or the second switch unit includes a second two-way switch.

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

the first switch unit comprises a first switch, a first one-way semiconductor component and a second one-way semiconductor component, wherein;

the first switch and the first one-way semiconductor component are connected in series with each other to form the first one-way branch, and the second one-way semiconductor component forms the second one-way branch and/or wherein the second switch unit comprises a second switch, a third one-way semiconductor component and a fourth one-way semiconductor component, wherein;

the second switch and the third one-way semiconductor component are connected in series with each other to form the third one-way branch, and the fourth one-way semiconductor component forms the fourth one-way branch.

7. The battery heating circuit according to claim 6, wherein:

the first switch unit further comprises a third switch in the second one-way branch, which is connected in series with the second one-way semiconductor component and/or wherein the second switch unit further comprises a fourth switch in the fourth one-way branch, which is connected in series with the fourth one-way semiconductor component.

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

the first switch unit further comprises a first resistor that is connected in series with the first one-way branch and/or the second one-way branch and/or wherein the second switch unit further comprises a second resistor that is connected in series with the third one-way branch and/or the fourth one-way branch.

9. The heating circuit according to claim 1, further comprising a polarity inversion unit, which is connected with the first charge storage component, wherein the polarity inversion unit is configured to invert a voltage polarity of the first charge storage component.

10. A heating circuit for at least a first battery and a second battery, wherein the heating circuit comprises:

a first charging/discharging circuit, which is connected to the first battery, and comprises a first damping component, a first current storage component, a first switch unit, and a first charge storage component, all of which are connected in a first loop with each other; and

a second charging/discharging circuit, which is connected to the second battery, and comprises a second damping component, a second current storage component, a second switch unit, and the first charge storage component, all of which are connected in a second loop with each other;

a polarity inversion unit, which is connected with the first charge storage component, wherein the polarity inversion unit is configured to invert a voltage polarity of the first charge storage component;

wherein;

the polarity inversion unit comprises a first single-pole double-throw switch and a second single-pole double-throw switch,

the first single-pole double-throw switch is arranged at a first end of the first charge storage component, while the second single-pole double-throw switch is arranged at a second end of the first charge storage component,

an input wire of the first single-pole double-throw switch is connected in the first charging/discharging circuit and the second charging/discharging circuit, a first output wire of the first single-pole double-throw switch is connected to a first pole plate of the first charge storage component, and a second output wire of the first single-pole double-throw switch is connected to a second pole plate of the first charge storage component; and

an input wire of the second single-pole double-throw switch is connected in the first charging/discharging circuit and the second charging/discharging circuit, a first output wire of the second single-pole double-throw switch is connected to the second pole plate of the first charge storage component, and a second output wire of the second single-pole double-throw switch is connected to the first pole plate of the first charge storage component.

11. A heating circuit for at least a first battery and a second battery, wherein the heating circuit comprises:

a first charging/discharging circuit, which is connected to the first battery, and comprises a first damping component, a first current storage component, a first switch unit, and a first charge storage component, all of which are connected in a first loop with each other; and

a second charging/discharging circuit, which is connected to the second battery, and comprises a second damping component, a second current storage component, a second switch unit, and the first charge storage component, all of which are connected in a second loop with each other;

a polarity inversion unit, which is connected with the first charge storage component, wherein the polarity inversion unit is configured to invert a voltage polarity of the first charge storage component;

wherein;

the polarity inversion unit comprises a one-way semiconductor component, a third current storage component and a switch, all of which are connected in series with each other, and the series circuit is connected in parallel between ends of the first charge storage component.

12. A heating circuit for at least a first battery and a second battery, wherein the heating circuit comprises:

a first charging/discharging circuit, which is connected to the first battery, and comprises a first damping component, a first current storage component, a first switch unit, and a first charge storage component, all of which are connected in a first loop with each other; and

a second charging/discharging circuit, which is connected to the second battery, and comprises a second damping component, a second current storage component, a second switch unit, and the first charge storage component, all of which are connected in a second loop with each other;

a polarity inversion unit, which is connected with the first charge storage component, wherein the polarity inversion unit is configured to invert a voltage polarity of the first charge storage component;

wherein;

the polarity inversion unit comprises a DC-DC module and a second charge storage component, the DC-DC module is connected with the first charge storage component and the second charge storage component respectively, and the DC-DC module is configured to transfer an electric quantity in the first charge storage component to the second charge storage component, and then transfer back the electric quantity in the second charge storage component to the first charge storage component, so as to achieve inversion of voltage polarity of the first charge storage component.

13. A heating circuit for at least a first battery and a second battery, wherein the heating circuit comprises:

a first charging/discharging circuit, which is connected to the first battery, and comprises a first damping component, a first current storage component, a first switch unit, and a first charge storage component, all of which are connected in a first loop with each other; and

a second charging/discharging circuit, which is connected to the second battery, and comprises a second damping component, a second current storage component, a second switch unit, and the first charge storage component, all of which are connected in a second loop with each other;

a polarity inversion unit, which is connected with the first charge storage component, wherein the polarity inversion unit is configured to invert a voltage polarity of the first charge storage component;

a switching control module, which is connected with the first switch unit, the second switch unit and the polarity inversion unit, and the switching control module is configured to control the first switch unit and/or the second switch unit to switch off when a current flowing through the first charging/discharging circuit and/or the second charging/discharging circuit reaches zero after a negative half cycle, and then control the polarity inversion unit to invert a voltage polarity of the first charge storage component.