# US 2021/0345480 A1 · Battery management system circuit

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- Number: US 2021/0345480 A1
- Document ID: US20210345480A1
- Status: Published application
- Kind: A1
- Application number: 17/273,455
- Filed: 2020-03-09
- Published: 2021-11-04
- Earliest claimed: 2019-04-25
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Ki Young LEE; Wongon KIM
- Web page: https://patentgrep.com/patent/US20210345480A1

## CPC

- H05K 1/0209: {External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings}
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H05K 1/0204: {using means for thermal conduction connection in the thickness direction of the substrate (H05K1/0207 takes precedence)}
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H05K 2201/10022: Non-printed resistor
- Y02E 60/10: Energy storage using batteries
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed is a battery management system circuit, including: a substrate; a first resistor part disposed on the substrate and including a plurality of resistors; a second resistor part disposed on the substrate and including a plurality of resistors; and a first perforation formed by piercing the substrate between the first resistor part and the second resistor part, and the first perforation diffuses heat generated by the first resistor part and the second resistor part.

## Claims

### Claim 1

A battery management system circuit, comprising:
a substrate;
a first resistor part disposed on the substrate and including a plurality of resistors;
a second resistor part disposed on the substrate and including a plurality of resistors; and
a first perforation formed by piercing the substrate between the first resistor part and the second resistor part,
wherein the first perforation is configured to diffuse heat generated by the first resistor part and the second resistor part.

### Claim 2 (depends on 1)

The battery management system circuit of claim 1, further comprising:
a second perforation formed by piercing the substrate at a position corresponding to a side surface of the first resistor part; and
a second perforation formed by piercing the substrate at a position corresponding to a side surface of the second resistor part,
wherein the second perforation is configured to diffuse heat generated in the first resistor part, and
the third perforation is configured to diffuse heat generated in the second resistor part.

### Claim 3 (depends on 2)

The battery management system circuit of claim 2, further comprising:
a first thermal pad attached to a plurality of resistors included in the first resistor part; and
a second thermal pad attached to a plurality of resistors included in the second resistor part,
wherein the first thermal pad is configured to conduct heat away from the first resistor part through the first and second perforations, and
the second thermal pad is configured to conduct heat away from the second resistor part through the second and third perforations.

### Claim 4 (depends on 3)

The battery management system circuit of claim 3, wherein
the first thermal pad is wound at least once around the first resistor part, and
the second thermal pad is wound at least twice around the second resistor part.

### Claim 5 (depends on 1)

The battery management system circuit of claim 1, further comprising:
a controller configured to control the battery management system circuit;
a connector configured to electrically connect the battery management system circuit to the outside; and
a current path configured to connect the controller, the first resistor part, the second resistor part, and the connector.

### Claim 6

A battery management system circuit, comprising:
a substrate;
a first resistor part disposed on the substrate and including a plurality of resistors; and
a first perforation formed by piercing the substrate at positions corresponding to three surfaces of the first resistor part,
wherein the first perforation is configured to diffuse heat generated in the first resistor part.

### Claim 7 (depends on 6)

The battery management system circuit of claim 6, wherein
the first perforation is formed to have a “U” shape.

### Claim 8 (depends on 7)

The battery management system circuit of claim 7, further comprising
a second resistor part including a plurality of resistors wherein the “U” shape of the first perforation corresponds to one side surface of the first resistor part, a lower surface of the first resistor part, a lower surface of the second resistor part, and one side surface of the second resistor part.

### Claim 9 (depends on 6)

The battery management system circuit of claim 6, further comprising:
a controller configured to control the battery management system circuit;
a connector configured to electrically connect the battery management system circuit to the outside; and
a current path configured to connect the controller, the first resistor part, and the connector.

### Claim 10

A battery management system circuit, comprising:
a substrate;
a first resistor part disposed on the substrate and including a plurality of resistors;
a first perforation formed by piercing the substrate at a position corresponding to a first surface of the first resistor part; and
a first thermal pad attached to a plurality of resistors included in the first resistor part,
wherein the first perforation is configured to diffuse heat generated in the first resistor part, and
wherein the third thermal pad, while penetrating through the first perforation, is wound at least once around the first resistor part and a lower surface of the substrate.

### Claim 11 (depends on 10)

The battery management system circuit of claim 10, further comprising:
a second resistor part including a plurality of resistors; and
a third resistor part including a plurality of resistors,
wherein the first thermal pad, while penetrating through the first perforation, is wound at least once around the second resistor part, the third resistor part, and the lower surface of the substrate.

### Claim 12 (depends on 10)

The battery management system circuit of claim 10, further comprising:
a controller configured to control the battery management system circuit;
a connector configured to electrically connect the battery management system circuit to the outside; and
a current path configured to connect the controller, the first resistor part, and the connector.