Electrical battery monitoring device and battery

Patent metadata

Field	Value
Publication number	US-11378627-B2
Application number	US-201916530332-A
Country	US
Kind code	B2
Filing date	Aug 2, 2019
Priority date	Aug 3, 2018
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A battery and an electrical battery monitoring device are disclosed having a first group of sensing switches connected in series on a first monitoring circuit, the sensing switches, a second group of electrical sensing switches connected in series on a second monitoring circuit, an input unit to provide an input to the first and second monitoring circuits, a monitoring unit to receive an output from the first and second monitoring circuits, wherein the monitoring unit receives at least two outputs from two measuring points of the first monitoring circuit, the two measuring points being separated by at least one sensing switch. The location of a defective battery cell may be early detected and precisely located by the monitoring of the battery cells in rows and columns.

First claim

The invention claimed is:

1. An electrical battery monitoring device, comprising:
a first group of electrical sensing switches connected in series on a first monitoring circuit, said first group of electrical sensing switches are configured to switch between a first state and a second state depending on at least one parameter of at least one battery cell of a battery;
a second group of electrical sensing switches connected in series on a second monitoring circuit, said second group of electrical sensing switches are configured to switch between a first state and a second state depending on at least one parameter of at least one battery cell of the battery, the second monitoring circuit being electrically isolated from the first monitoring circuit;
an input unit connected to the first monitoring circuit at a first input point and to the second monitoring circuit at a second input point, said first input point adapted to provide an electrical input to the first monitoring circuit and to the second monitoring circuit;
a monitoring unit adapted to receive at least one electrical output from the first monitoring circuit and at least one electrical output from the second monitoring circuit;
wherein the first monitoring circuit comprises at least two measuring points connected to the monitoring unit, said at least two measuring points being located downstream and separated from the first input point by at least one sensing switch of the first group;
wherein the monitoring unit is configured to receive at least two electrical outputs from the at least two measuring points of the first monitoring circuit; and,
wherein the two measuring points are separated by at least one sensing switch.

2. The device according to claim 1 , wherein
the second monitoring circuit comprises at least two measuring points connected to the monitoring unit, said at least two measuring points being located downstream and separated from the second input point by at least one sensing switch;
the monitoring unit is adapted to receive at least two electrical outputs from the at least two measuring points of the second monitoring circuit; and,
the two measuring points are separated by at least one sensing switch.

3. The device according to claim 1 , wherein the first monitoring circuit comprises at least two sensing switches between two consecutive measuring points.

4. The device according to claim 1 , wherein at least one sensing switch of the first group or second group of electrical sensing switches is configured to switch between a first state and a second state depending on temperature.

5. The device according to claim 1 , wherein at least one sensing switch of the first monitoring circuit is adapted to switch at a first temperature, and at least one sensing switch of the second monitoring circuit is adapted to switch at a second temperature, the second temperature being higher than the first temperature.

6. The device according to claim 1 , further comprising at least one sensing switch of the first group and at least one sensing switch of the second group in proximity to each other.

7. The device according to claim 1 , wherein
the at least two measuring points of the first monitoring circuit separate at least two groups, called monitored columns, of sensing switches;
the second monitoring circuit comprises at least two measuring points separating at least two groups, called monitored rows, of sensing switches; and,
at least two consecutive sensing switches of the first monitoring circuit pertaining to a same monitored column, each form a sensing pair with a sensing switch of two sensing switches of the second monitoring circuit, the two sensing switches of the second monitoring circuit pertaining to two different monitored rows.

8. The device according to claim 1 , further comprising:
a controlled switch on at least one electrical output of the battery,
a controller adapted to open the controlled switch.

9. The device according to claim 8 , wherein the controller is adapted to open the controlled switch upon reception of at least one predetermined output from at least one of the first monitoring circuit and the second monitoring circuit.

10. The device according to claim 8 , wherein the controller is configured to open the controlled switch exclusively upon reception of a first output from the first monitoring circuit and of a second output from the second monitoring circuit.

11. An electrical battery, comprising:
a plurality of battery cells;
a monitoring device comprising:
a first group of electrical sensing switches connected in series on a first monitoring circuit, said sensing switches being adapted to switch between a first state and a second state depending on at least one parameter of at least one battery cell of the battery;
a second group of electrical sensing switches connected in series on a second monitoring circuit, said sensing switches are configured to switch between a first state and a second state depending on at least one parameter of at least one battery cell of the battery, the second monitoring circuit being electrically isolated from the first monitoring circuit;
an input unit connected to the first monitoring circuit at a first input point and to the second monitoring circuit at a second input point, said first input point being adapted to provide an electrical input to the first monitoring circuit and to the second monitoring circuit;
a monitoring unit adapted to receive at least one electrical output from the first monitoring circuit and at least one electrical output from the second monitoring circuit;

wherein
the first monitoring circuit comprises at least two measuring points connected to the monitoring unit, said at least two measuring points being located downstream and separate from the first input point by at least one sensing switch of the first group;
the monitoring unit is configured to receive at least two electrical outputs from the at least two measuring points of the first monitoring circuit;
the at least two measuring points are separated by at least one sensing switch.

12. The battery according to claim 11 , wherein the second monitoring circuit comprises at least two measuring points separating at least two groups, called monitored rows, of sensing switches.

13. The battery according to claim 11 , wherein a battery cell of the plurality of the battery cells is proximate to at least one sensing pair comprising at least one sensing switch of the first group and to at least one sensing switch of the second group.

14. The battery according to claim 11 , wherein the at least two measuring points of the first monitoring circuit separate at least two groups, called monitored columns, of sensing switches.

15. The battery according to claim 14 , wherein each battery cell is proximate to at least one sensing switch pertaining to at least one monitored row of the first monitoring circuit and to at least one sensing switch pertaining to at least one monitored column of the second monitoring circuit.

Assignees

• Airbus Helicopters Deutschland GmbH
• Airbus Defence & Space Gmbh

Inventors

• Weinreiter Philipp
• Zimmermann Kristian

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/51

  Connection only in series · CPC title

• G01R31/382 Primary

  Arrangements for monitoring battery or accumulator variables, e.g. SoC · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title