Thermal battery system and ignition method of the same

Patent metadata

Field	Value
Publication number	US-11916261-B2
Application number	US-202117547206-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Dec 10, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Provided are a thermal battery system and an ignition method of the same, wherein the thermal battery system includes: a thermal battery assembly including a plurality of thermal batteries arranged in series and in parallel; an ignition circuit connected to the plurality of thermal batteries in the thermal battery assembly; and a control unit configured to control the ignition circuit such that each of the plurality of thermal batteries in the thermal battery assembly is selectively ignited, wherein the control unit is configured to selectively ignite one of the plurality of thermal batteries in an active matrix manner by controlling an ignition circuit.

First claim

What is claimed is:

1. A thermal battery system comprising:
a thermal battery assembly including a plurality of thermal battery modules each comprising a plurality of thermal batteries;
an ignition circuit connected to the plurality of thermal batteries in the thermal battery assembly; and
a control unit configured to control the ignition circuit to ignite a selected thermal battery in the thermal battery assembly,
wherein the ignition circuit comprises:
a first terminal configured to apply a first ignition voltage;
a second terminal configured to apply a second ignition voltage;
a plurality of first wires and a plurality of second wires; and
a plurality of first switches and a plurality of second switches, and

wherein each of the plurality of first wires connects to each of first ignition electrodes of the thermal batteries arranged in each of the plurality of thermal battery modules, and each of the plurality of second wires connects to each of second ignition electrodes of the thermal batteries arranged in each of the plurality of thermal battery modules, and
each of the plurality of first switches connects the first terminal to a corresponding one of the plurality of first wires, and each of the plurality of second switches connects the second terminal to a corresponding one of the plurality of second wires, and
the control unit is configured to turn on one of the plurality of first switches and one of the plurality of second switches and ignites a thermal battery in which a first ignition electrode is connected to a first wire corresponding to the turned-on first switch and a second ignition electrode is connected to a second wire corresponding to the turned-on second switch.

2. The thermal battery system of claim 1 , wherein
the thermal battery assembly comprises the plurality of thermal battery modules connected in series when the plurality of thermal batteries operate as an energy source,
each of the plurality of thermal battery modules comprises the plurality of thermal batteries connected in parallel when the plurality of thermal batteries operate as an energy source,
the thermal batteries arranged in parallel are arranged at the plurality of thermal battery modules, respectively, and
the thermal batteries arranged in series are arranged at corresponding locations in the plurality of thermal battery modules.

3. The thermal battery system of claim 2 , wherein
the thermal battery assembly comprises M thermal battery modules,
each of the M thermal battery modules comprises N thermal batteries,
a number of the plurality of first switches is N, and
a number of the plurality of second switches is M.

4. The thermal battery system of claim 1 , wherein
the control unit is configured to select one of the plurality of thermal batteries by turning on one of the plurality of first switches and one of the plurality of second switches, and
individually ignite the selected thermal battery.

5. The thermal battery system of claim 1 , wherein
the control unit is configured to sequentially ignite the plurality of thermal batteries at pre-set time intervals.

6. The thermal battery system of claim 5 , wherein
the pre-set time intervals are 10 ms.

7. An ignition method for a thermal battery system comprising
a thermal battery assembly including battery modules each comprising a plurality of thermal batteries, an ignition circuit connected to the plurality of thermal batteries in the thermal battery assembly, and a control unit configured to control the ignition circuit to ignite a selected thermal battery in the thermal battery assembly, the ignition method comprising:
selecting, by the control unit, one of a plurality of first wires connecting to one of first ignition electrodes of thermal batteries arranged in each battery module, and turning on a first switch for connecting the selected first wire to a first terminal;
selecting, by the control unit, one of a plurality of second wires connecting to one of second ignition electrodes of thermal batteries arranged in one of the battery modules, and turning on a second switch for connecting the selected second wire to a second terminal;
igniting, by the control unit, a thermal battery in which a first electrode is connected to the selected first wire and a second electrode is connected to the selected second wire; and
repeating, by the control unit, the turning on of the first switch, the turning on of the second switch, and the igniting of the thermal battery.

8. The ignition method of claim 7 , wherein
the repeating comprises
sequentially igniting, by the control unit, the plurality of thermal batteries at pre-set time intervals.

9. The ignition method of claim 8 , wherein the pre-set time intervals are 10 ms.

Assignees

• Agency Defense Dev

Inventors

• Im Chaenam
• Lee Jae In
• Yoon Hyunki
• Choi Yusong
• Cho Jang Hyeon

Classifications

• H01M6/36 Primary

  containing electrolyte and made operational by physical means, e.g. thermal cells · CPC title

• H01M6/5038

  Heating or cooling of cells or batteries · CPC title

• H01M6/5088

  Initial activation; predischarge; Stabilisation of initial voltage · CPC title

• H01M50/509

  characterised by the type of connection, e.g. mixed connections · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title