Power cabinet management method and apparatus, and battery management system

• US 9,882,400 B2
• Filed: 11/18/2015
• Issued: 01/30/2018
• Est. Priority Date: 11/20/2014
• Status: Active Grant

• Current Assignee: Contemporary Amperex Runzhi Software Technology Limited (Contemporary Amperex Technology Co., Ltd.)
• Original Assignee: Contemporary Amperex Technology Co., Ltd.
• Inventors: Dai, Jinzhen, Mei, Jingyao, Hu, Jianguo
• Primary Examiner(s): Johnson, Terrell
• Application Number:
  US14/945,398
• Publication Number:
  US 20160149422A1
• Time in Patent Office: 804 Days
• 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

A power cabinet management method, a power cabinet management apparatus and a battery management system are provided. The power cabinet management method includes: 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. 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 method for managing battery power storage cabinet by a battery management system (BMS), comprising steps of:

automatically detecting and storing, by the BMS, a running state of each battery power cabinet in a battery power cabinet array in real time;

analyzing, by the BMS, the running state detected in real time, and acquiring information of a faulty battery power cabinet;

allowing, by the BMS, a detected faulty battery power cabinet to exit from the battery power cabinet array according to the acquired information of the faulty battery power cabinet;

excluding, by the BMS, parameters of the detected faulty battery power cabinet from parameter calculation of the battery power cabinet array;

automatically detecting, by the BMS, state of whether the faulty battery power cabinet in real time;

when it is detected and analyzed that the state of the faulty battery power cabinet returns to normal, adding, by the BMS, the battery power cabinet that returns to normal to the battery power cabinet array; and

adding, by the BMS, the parameters of the battery power cabinet that returns to normal to the parameter calculation of the battery power cabinet array;

wherein the step of allowing, by the BMS, a detected faulty battery power cabinet to exit from the battery power cabinet array according to the acquired information of the faulty battery power cabinet, comprises;

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

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

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

2. The method according to claim 1, wherein:

voltage, current and communication status of each battery power cabinet are monitored in real time by the BMS to identify a detected faulty battery power cabinet.

3. The method according to claim 2, 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.

4. The method according to claim 3, 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.

5. A power cabinet management apparatus, comprising:

a first detecting module, configured to automatically detect and store a running state of each battery power cabinet in a battery power cabinet array in real time, and the first detecting module is further configured to analyze the running state detected in real time, and acquire information of a faulty battery power cabinet;

a cabinet exiting module, configured to allow a detected faulty battery power cabinet to exit from the battery power cabinet array according to the acquired information of the faulty battery power cabinet;

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

a second detecting module, configured to automatically detect state of the faulty battery power cabinet in real time;

a cabinet adding module, configured to, when the second detecting module detected and analyzed that the state of the faulty battery power cabinet returns to normal, add the battery power cabinet that returns to normal to the battery power cabinet array; and

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

wherein the excluding module is further configured to request a power conversion system (PCS) to stop charging and discharging, and to disconnect high voltage of all sub-cabinets;

request the PCS to output high voltage to battery power cabinets except the faulty battery power cabinet identified; and

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

6. A battery management system, comprising:

a processor; and

a memory for storing a processor-executable instruction;

wherein the processor is configured to;

automatically detect and store each battery power cabinet in a battery power cabinet array in real time;

analyze the running state detected in real time, and acquire information of a faulty battery power cabinet;

allow a detected faulty battery power cabinet to exit from the battery power cabinet array according to the acquired information of the faulty battery power cabinet; and

exclude parameters of the faulty battery power cabinet from parameter calculation of the battery power cabinet array;

wherein the processor is further configured to;

automatically detect whether state of the faulty battery power cabinet in real time returns to normal;

when detected and analyzed that the state of 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 parameters of the battery power cabinet that returns to normal to the parameter calculation of the battery power cabinet array;

wherein the processor is further configured to request a power conversion system (PCS) to stop charging and discharging, and to disconnect high voltage of all sub-cabinets;

request the PCS to output high voltage to battery power cabinets except the faulty battery power cabinet identified; and

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