POWER CABINET MANAGEMENT METHOD AND APPARATUS, AND BATTERY MANAGEMENT SYSTEM

• US 20160149422A1
• Filed: 11/18/2015
• Published: 05/26/2016
• Est. Priority Date: 11/20/2014
• Status: Active Grant

• Current Assignee: Contemporary Amperex Runzhi Software Technology Limited (Contemporary Amperex Technology Co., Ltd.)
• Original Assignee: Ningde Contemporary Amperex Technology Ltd
• Inventors: DAI, Jinzhen, MEI, Jingyao, HU, Jianguo
• Granted Patent: US 9,882,400 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 31/3647 for determining the ability of a battery to perform a critical function, e.g. cranking
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

The present application provides a power cabinet management method and apparatus and a battery management system. The power cabinet management method comprises: detecting each battery power cabinet in a battery power cabinet array in real time; allowing a detected faulty battery power cabinet to exit from the battery power cabinet array; and excluding the faulty battery power cabinet from parameter calculation of the battery power cabinet array. The technical solutions provided by the embodiments of the present application may achieve the following beneficial effect: When a certain battery power cabinet in a battery power cabinet array of a battery energy storage system fails, the faulty battery power cabinet can automatically exit without affecting the normal operation of the entire battery energy storage system.

Claims

1. A power cabinet management method, wherein, comprising:

detecting a running state of each battery power cabinet in a battery power cabinet array in real time;

allowing a detected faulty battery power cabinet to exit from the battery power cabinet array; and

excluding the faulty battery power cabinet from parameter calculation of the battery power cabinet array.

2. The method according to claim 1, wherein, further comprising:

detecting whether the faulty battery power cabinet returns to normal;

adding the battery power cabinet that returns to normal to the battery power cabinet array; and

adding the battery power cabinet that returns to normal to the parameter calculation of the battery power cabinet array.

3. The method according to claim 2, wherein:

voltage, current and communication status of the each battery power cabinet are monitored in real time by a battery Managment system (BMS), and a detected faulty battery power cabinet is identified.

4. The method according to claim 3, wherein the allowing a detected faulty battery power cabinet to exit from the battery power cabinet array comprises:

requesting a power conversion system (PCS) by the BMS to stop charging and discharging, and to disconnect high voltage of all sub-cabinets;

requesting the PCS by the BMS to output high voltage to battery power cabinets except the faulty battery power cabinet identified; and

sending a request to the PCS by the BMS to restore charging and discharging of the battery power cabinets except the faulty battery power cabinet identified.

5. The method according to claim 3, wherein the detecting whether the faulty battery power cabinet returns to normal comprises:

detecting by the BMS, whether voltage, current and communication status of the faulty battery power cabinet meet a preset cabinet adding condition; and

when the preset cabinet adding condition is met, determining that the faulty battery power cabinet returns to normal, and clearing the identification of the battery power cabinet that returns to normal.

6. The method according to claim 5, wherein the adding the battery power cabinet that returns to normal to the battery power cabinet array comprises:

requesting the PCS by the BMS to stop charging and discharging, and to disconnect high voltage;

requesting the PCS by the BMS to output high voltage to all the battery power cabinets; and

requesting the PCS by the BMS to allow charging and discharging.

7. A power cabinet management apparatus, comprising:

a first detecting module, configured to detect a running state of each battery power cabinet in a battery power cabinet array in real time;

a cabinet exiting module, configured to allow a detected faulty battery power cabinet to exit from the battery power cabinet array; and

an excluding module, configured to exclude the faulty battery power cabinet from parameter calculation of the battery power cabinet array.

8. The apparatus according to claim 7, further comprising:

a second detecting module, configured to detect whether the faulty battery power cabinet returns to normal;

a cabinet adding module, configured to add the battery power cabinet that returns to normal to the battery power cabinet array; and

an adding module, configured to add the battery power cabinet that returns to normal to the parameter calculation of the battery power cabinet array.

9. A battery Managment system, comprising:

a processor; and

a memory for storing a processor-executable instruction;

wherein the processor is configured to;

detect each battery power cabinet in a battery power cabinet array in real time;

allow a detected faulty battery power cabinet to exit from the battery power cabinet array; and

exclude the faulty battery power cabinet from parameter calculation of the battery power cabinet array.

10. The battery Managment system according to claim 9, wherein the processor is further configured to:

detect whether the faulty battery power cabinet returns to normal;

add the battery power cabinet that returns to normal to the battery power cabinet array; and

add the battery power cabinet that returns to normal to the parameter calculation of the battery power cabinet array.