Communication terminating resistance automatic setting method of energy storage system

• US 10,374,265 B2
• Filed: 03/15/2018
• Issued: 08/06/2019
• Est. Priority Date: 03/16/2017
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Kim, Duk Su, Lee, Jong Kook, Kim, Ho Soo, Cho, Sung Hyun, Lim, Geun Wook, Park, Jong Doo, Heo, Jin Seok
• Primary Examiner(s): Muralidar, Richard V
• Application Number:
  US15/922,460
• Publication Number:
  US 20180269543A1
• Time in Patent Office: 509 Days
• Field of Search: 320106, 320116, 320126
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04L 12/40 Bus networks
• CPC Class Codes: H04L 2012/40215 Controller Area Network CAN
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin

Abstract

The present invention relates to a method of automatically setting a communication resistance of an energy storage device (ESS), and more particularly, to a method of automatically controlling connection of a battery module and a terminating resistance by using a battery management system (BMS) ID allocated to each battery module constituting the ESS.

Claims

1. A connection system of a battery module and a terminating resistance of an energy storage system (ESS) including a plurality of battery modules, the connection system comprising:

a master battery management system (BMS) configured to allocate IDs to a plurality of slave modules connected to a master module, calculate the number of all the battery modules through this, and transmit the number to the respective slave modules;

a slave BMS configured to compare whether the number of all the battery modules received from the master BMS matches the allocated corresponding ID;

a first terminating resistance connected to the lowest slave BMS included in the slave module connected to the lowest one of the plurality of slave modules; and

a control unit configured to compare whether the number of all the battery modules matches a corresponding ID and output a connection control signal for controlling a connection of the lowest slave BMS and the first terminating resistance according to a comparison result.

2. The connection system of claim 1, wherein the comparing of whether the number of all the battery modules matches the corresponding ID is performed by the lowest slave BMS.

3. The connection system of claim 1, further comprising a connection switch for connecting or disconnecting the connection between the lowest slave BMS and the first terminating resistance according to a control signal outputted from the control unit.

4. The connection system of claim 3, wherein the control unit outputs an ON signal for connecting the lowest slave BMS and the first terminating resistance to a connection switch if it is determined that the number of all the battery modules received from the master BMS in the slave BMS matches the allocated corresponding ID and outputs an OFF signal for disconnecting the connection between the lowest slave BMS and the first terminating resistance to the connection switch if it is determined that the number of all the battery modules received from the master BMS in the slave BMS does not match the allocated corresponding ID.

5. The connection system of claim 1, further comprising a second terminating resistance configured in an upper charge/discharge device for controlling the entire battery module to communicatively connect the upper charge/discharge device and the master BMS.

6. A method of connecting a battery module and a terminating resistance in an ESS including a plurality of battery modules, the method comprising:

an ID allocation operation for receiving an allocated corresponding ID from a master BMS connected to a second terminating resistance configured in an upper charge/discharge device;

a module number reception operation for receiving the number of all the battery modules calculated through ID allocation, from the master BMS;

a matching comparison operation for comparing whether the number of all the battery modules received in the module number reception operation matches the allocated corresponding ID; and

a first terminating resistance connection control operation for controlling a connection between a lowest slave BMS connected to the lowest one of the plurality of slave BMSs connected to the master BMS and a first terminating resistance connected to the lowest slave BMS according to the comparison result in the matching comparison operation.

7. The method of claim 6, wherein the matching comparison operation is performed by the lowest slave BMS connected to the lowest one among the plurality of slave BMSs connected to the master module.

8. The method of claim 6, wherein the first terminating resistance connection control operation controls the lowest BMS and the first terminating resistance to be connected if the number of all the battery modules performed in the matching comparison operation matches an allocated corresponding ID, and controls the lowest BMS and the first terminating resistance to be disconnected if the number of all the battery modules performed in the matching comparison operation does not match the allocated corresponding ID.