Battery module and power system

Patent metadata

Field	Value
Publication number	US-11626624-B2
Application number	US-202117150126-A
Country	US
Kind code	B2
Filing date	Jan 15, 2021
Priority date	Jan 15, 2020
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A power system includes a battery module and a battery ECU. The battery module includes multiple battery stacks. Each of multiple battery stacks includes multiple battery cells, multiple detectors which independently detect physical values of the multiple battery cells, respectively, and multiple individual communicators which wirelessly output detection results of the multiple detectors. Each of the multiple individual communicators communicates a radio signal wirelessly to and from a general monitor. The multiple battery stacks and the general monitor are accommodated in a storage space in a housing having electromagnetic shielding performance. A shield is also accommodated in the storage space while facing a communication hole formed on the housing.

First claim

What is claimed is:

1. A battery module comprising:
at least two assembled batteries, each of the at least two assembled batteries including:
at least two battery cells; and
at least two individual detectors configured to individually detect physical values of the at least two battery cells, respectively;

at least two individual communicators configured to wirelessly output at least two respective detection results, each of the at least two respective detection results being generated by the at least two individual detectors included in respective ones of the at least two assembled batteries;
a communications monitor configured to monitor and wirelessly communicate radio signals to and from the at least two individual communicators;
an electromagnetic shielding housing having a storage space defined by a compartment wall and that houses the at least two assembled batteries, the at least two individual detectors and the at least two individual communicators, the compartment wall having a non-electromagnetic shielding portion and an electromagnetic shielding portion; and
an electromagnetic shield arranged opposite to the non-electromagnetic shielding portion in the electromagnetic shielding housing,
wherein a distance between the electromagnetic shield and the non-electromagnetic shielding portion is shorter than a distance between each of the at least two individual communicators and the non-electromagnetic shielding portion.

2. The battery module as claimed in claim 1 , wherein the electromagnetic shield includes:
a facing portion that faces the non-electromagnetic shielding portion; and
a leg extended from the facing portion and connected to the compartment wall.

3. The battery module as claimed in claim 2 , wherein:
the leg is annular and rises from the facing portion toward the compartment wall, and
at least a tip of the leg is connected to the compartment wall by at least partially surrounding the non-electromagnetic shielding portion.

4. The battery module as claimed in claim 1 , wherein at least a part of the electromagnetic shield is composed of a conductive wire netting.

5. The battery module as claimed in claim 1 , wherein the non-electromagnetic shielding portion includes a hole through the compartment wall to communicate the storage space to an outside.

6. The battery module as claimed in claim 5 , wherein the non-electromagnetic shielding portion includes a nonconductive seal that seals the hole.

7. A power system comprising:
at least two assembled batteries, each of the at least two assembled batteries including:
at least two battery cells; and
at least two individual detectors, each of the at least two individual detectors is configured to detect a physical value of a separate one of the at least two battery cells;

at least two individual communicators configured to wirelessly output at least two detection results from the at least two individual detectors, each of the at least two detection results being generated by a separate one of the at least two individual detectors;
a communications monitor configured to monitor and wirelessly communicate radio signals to and from the at least two individual communicators;
an ECU wired to the communications monitor and configured to equalize the physical values of the at least two battery cells;
an electromagnetic shielding housing having a storage space defined by a compartment wall and that houses the at least two assembled batteries, the at least two individual detectors and the at least two individual communicators, the compartment wall having a non-electromagnetic shielding portion and an electromagnetic shielding portion; and
an electromagnetic shield that faces the non-electromagnetic shielding portion and is in the electromagnetic shielding housing.

8. The battery module as claimed in claim 1 , wherein the communications monitor is housed in the electromagnetic shielding housing and is on a surface of the compartment wall that includes the non-electromagnetic shielding portion.

9. The battery module as claimed in claim 8 , wherein the communications monitor and the electromagnetic shield are aligned in a height direction perpendicular to a facing direction of the non-electromagnetic shielding portion and the electromagnetic shield.

10. The battery module as claimed in claim 9 , further comprising at least two battery stacks, wherein:
each of the at least two battery stacks includes one of the at least two assembled batteries;
each of the at least two individual communicators is in a separate one of the plurality of at least two battery stacks and is at an end portion on the side where the communications monitor is arranged with respect to the electromagnetic shield in the height direction, and
the non-electromagnetic shielding portion is below the end portion in the height direction.

11. The battery module as claimed in claim 10 , wherein
the at least two battery stacks are arranged in the facing direction, and
the at least two battery stacks and the communications monitor are arranged in the facing direction.

12. The battery module as claimed in claim 11 , wherein
in the height direction, the each of the at least two individual communicators is above a portion where the communications monitor and a first battery stack of the at least two battery stacks face each other, the first battery stack of the at least two battery stacks being closer to the communications monitor than all other of the at least two battery stacks,
in the height direction, the electromagnetic shield is below the portion where the communications monitor and the first battery stack of the at least two battery stacks face each other, and
in the facing direction, a distance between the communications monitor and the first battery stack of the at least two battery stacks is shorter than a distance between the electromagnetic shield and a second battery stack of the at least two battery stacks, the second battery stack of the at least two battery stacks being closer to the electromagnetic shield than all other of the at least two battery stacks.

13. The battery module as claimed in claim 10 , wherein the electromagnetic shield extends in the facing direction from a surface of the compartment wall having the non-electromagnetic shielding portion between the non-electromagnetic shielding portion and the each of the at least two the individual communicators in the height direction.

14. The battery module as claimed in claim 10 , wherein in the height direction, an upper end of each of the at least two the individual communicators and the communications monitor is located above the each of the at least two battery stacks.

15. The battery module as claimed in claim 1 , wherein the electromagnetic shield is thinner than a portion of the compartment wall having the non-electromagnetic shielding portion.

16. The battery module as claimed in claim 1 , wherein the electromagnetic shield is connected to a surface of the compartment wall having the non-electromagnetic shielding portion in a manner surrounding the non-electromagnetic shielding portion.

17. The battery module as claimed in claim 1 , wherein the non-electromagnetic shielding portion includes a resin material.

18. The battery module as claimed in claim 1 ,
further comprising at least two battery stacks, wherein:
each of the at least two battery stacks includes one of the at least two assembled batteries; and
the non-electromagnetic shielding portion is between an upper end and a lower end of the each of the at least two battery stacks in

Assignees

• Denso Corp

Inventors

• Aoki Kousuke
• NUMATA Tatsuhiro

Classifications

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title

• H01M50/24

  adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) · CPC title

• H01M2010/4278

  Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller · CPC title

• H01M10/4207

  for several batteries or cells simultaneously or sequentially · CPC title