# US 12,113,346 B2 · Current measurement device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,113,346 B2
- Document ID: US12113346B2
- Status: Granted
- Kind: B2
- Application number: 17/798,183
- Filed: 2021-07-14
- Published: 2023-03-09
- Granted: 2024-10-08
- Earliest claimed: 2020-07-20
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Hyeon-Jin Song
- Web page: https://patentgrep.com/patent/US12113346B2

## CPC

- G01R 1/36: Overload-protection arrangements or circuits for electric measuring instruments
- H02H 1/0007: {concerning the detecting means (in general G01R or other subclasses of G01; reed switches H01H71/2445)}
- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 58/10: for monitoring or controlling batteries
- G01R 19/0046: {characterised by a specific application or detail not covered by any other subgroup of G01R19/00}
- G01R 27/14: Measuring resistance by measuring current or voltage obtained from a reference source (G01R27/16, G01R27/20, G01R27/22 take precedence)
- G01R 31/374: with means for correcting the measurement for temperature or ageing
- G01R 31/3835: involving only voltage measurements
- H01H 39/006: {Opening by severing a conductor}
- H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence)
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H01M 50/583: in response to current, e.g. fuses
- H02H 7/18: for batteries; for accumulators
- B60L 2240/549: Current
- G01R 1/203: {Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R)}
- G01R 19/16542: {for batteries (charge condition monitoring in G01R31/36)}
- G01R 31/364: Battery terminal connectors with integrated measuring arrangements
- G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC
- H01H 9/52: Cooling of switch parts (cooling of contacts H01H1/62)
- H01H 71/125: {characterised by sensing elements, e.g. current transformers (for differential protection H01H83/144)}
- H01H 2039/008: {using the switch for a battery cutoff}
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H01M 2200/00: Safety devices for primary or secondary batteries
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- 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

A current measurement apparatus configured to quickly block current. The current measurement apparatus includes a first terminal, a second terminal, a resistor interposed in a separated space between the first terminal and the second terminal; a circuit board, a control unit mounted on the circuit board and configured to measure a current flowing in the resistor by using a voltage value between the first terminal and the second terminal and a resistance value of the resistor, and a cutting unit located above or below the resistor and configured to cut the resistor according to a control signal of the control unit.

## Claims

### Claim 1

A current measurement apparatus, comprising:
an electrically conductive first terminal;
an electrically conductive second terminal spaced apart from the first terminal by a predetermined distance;
an electrically conductive resistor positioned in a space between the first terminal and the second terminal, wherein a material of the electrically conductive resistor has a greater specific resistance than materials of the first terminal and the second terminal;
a circuit board including an electric path, the circuit board positioned at a side portion of the first terminal and a side portion of the second terminal, and electrically connected to the first terminal and the second terminal, respectively; and
a control unit mounted on the circuit board and configured to measure a current flowing in the resistor based on a voltage value between the first terminal and the second terminal and a resistance value of the resistor,
wherein the control unit is configured to issue a control signal to cut the resistor based on the measured current,
wherein the circuit board includes a body portion positioned at the side portion of the first terminal and the side portion of the second terminal, a first extending portion extending in a horizontal direction from the body portion and positioned on a surface of the first terminal, and a second extending portion positioned on a surface of the second terminal.

### Claim 2 (depends on 1)

The current measurement apparatus according to claim 1,
wherein each of the first terminal and the second terminal is a plate and is positioned on a same plane as the circuit board.

### Claim 3 (depends on 1)

The current measurement apparatus according to claim 1,
further comprising gunpowder, an ignition switch, a cylinder, and a piston, wherein the cylinder is positioned at least partially above the surfaces of both the first extending portion and the second extending portion.

### Claim 4 (depends on 3)

The current measurement apparatus according to claim 3,
wherein the cylinder comprises:
a main body positioned above the space between the first extending portion and the second extending portion; and
a lower protrusion extending outward from the main body in a horizontal direction and positioned at least partially above each of the first extending portion and the second extending portion.

### Claim 5 (depends on 1)

The current measurement apparatus according to claim 1,
wherein the circuit board is configured to be removably attached to the first terminal and the second terminal.

### Claim 6 (depends on 1)

The current measurement apparatus according to claim 1,
wherein the control signal causes the resistor to be cut by exploding the gunpowder.

### Claim 7 (depends on 6)

The current measurement apparatus according to claim 6,
further comprising a press configured to press the resistor in response to explosion of the gunpowder, and a cover wherein the resistor is positioned between the press and the cover, and wherein the cover is configured to prevent scattering of the resistor when cut by the press.

### Claim 8 (depends on 1)

The current measurement apparatus according to claim 1,
wherein the circuit board includes a heat dissipation member positioned on a surface of the circuit board, and a heat transfer material interposed between the heat dissipation member and at least one of the first terminal, the resistor or the second terminal.

### Claim 9 (depends on 1)

A battery pack, comprising the current measurement apparatus according to claim 1.

### Claim 10 (depends on 1)

A vehicle, comprising the current measurement apparatus according to claim 1.