# US 2021/0276429 A1 · Vehicle and battery pack for the same

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- Number: US 2021/0276429 A1
- Document ID: US20210276429A1
- Status: Published application
- Kind: A1
- Application number: 17/172,954
- Filed: 2021-02-10
- Published: 2021-09-09
- Earliest claimed: 2020-03-04
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Dolores KIM; Byeongseon MIN; Joonwoo SONG
- Web page: https://patentgrep.com/patent/US20210276429A1

## CPC

- B60L 3/0007: {Measures or means for preventing or attenuating collisions}
- B60L 15/08: using pulses
- B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H)
- B60L 3/12: Recording operating variables {; Monitoring of operating variables}
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 58/10: for monitoring or controlling batteries
- H02J 7/90: Regulation of charging or discharging current or voltage
- B60L 2240/16: longitudinal
- B60L 2240/18: lateral
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- 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
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A vehicle includes: a battery; an electric motor to be actuated by electric energy stored in the battery; a switch coupled between the battery and the electric motor; an inertial sensor configured to output an acceleration signal; a controller configured to output a pulse width modulation (PWM) signal having a duty ratio according to an acceleration magnitude of the acceleration signal; and a switch driving circuit configured to generate a control current for controlling the switch based on the PWM signal.

## Claims

### Claim 1

A vehicle comprising:
a battery;
an electric motor to be actuated by electric energy stored in the battery;
a switch coupled between the battery and the electric motor;
an inertial sensor configured to output an acceleration signal;
a controller configured to output a pulse width modulation (PWM) signal having a duty ratio according to an acceleration magnitude of the acceleration signal; and
a switch driving circuit configured to generate a control current for controlling the switch based on the PWM signal.

### Claim 2 (depends on 1)

The vehicle of claim 1, wherein,
the controller is configured to output a PWM signal having a set first duty ratio to the switch driving circuit when the acceleration magnitude is greater than or equal to a first threshold value and less than a second threshold value that is greater than the first threshold value, and
the first duty ratio is greater than a minimum duty ratio for maintaining the switch in a closed state and is less than 100% duty ratio.

### Claim 3 (depends on 2)

The vehicle of claim 2, wherein
the controller is configured to output a PWM signal having a duty ratio of 100% to the switch driving circuit to close the switch when the acceleration magnitude is less than the first threshold value, and
the controller is configured to output a PWM signal having a duty ratio of 0% to the switch driving circuit to open the switch when the acceleration magnitude is greater than or equal to the second threshold value.

### Claim 4 (depends on 2)

The vehicle of claim 2, further comprising a collision sensor configured to output a collision signal when a collision is detected,
wherein the controller is configured to output a PWM signal having a duty ratio of 0% to the switch driving circuit in response to receiving the collision signal.

### Claim 5 (depends on 1)

The vehicle of claim 1, wherein the controller is configured to output a PWM signal having a duty ratio monotonically decreasing according to the acceleration magnitude and in a duty ratio range between a minimum duty ratio for maintaining the switch in a closed state and 100% duty ratio when the acceleration magnitude is less than a first threshold value.

### Claim 6 (depends on 1)

The vehicle of claim 1, wherein
the acceleration signal comprises a longitudinal acceleration signal and a lateral acceleration signal, and
the controller is configured to output a PWM signal having a first duty ratio to the switch driving circuit when at least one selected from a longitudinal acceleration magnitude of the longitudinal acceleration signal and a lateral acceleration magnitude of the lateral acceleration signal is greater than or equal to a first threshold value and less than a second threshold value.

### Claim 7

A battery pack for a vehicle, the battery pack comprising:
a battery;
a switch coupled between the battery and an external terminal;
a battery controller configured to receive an acceleration information signal from the vehicle and to output a pulse width modulation (PWM) signal having a duty ratio according to an acceleration magnitude; and
a switch driving circuit configured to generate a control current for controlling the switch based on the PWM signal.

### Claim 8 (depends on 7)

The battery pack of claim 7, wherein,
the battery controller is configured to output a PWM signal having a set first duty ratio to the switch driving circuit when the acceleration magnitude is greater than or equal to a first threshold value and is less than a second threshold value that is greater than the first threshold value, and
the first duty ratio is greater than a minimum duty ratio for maintaining the switch in a closed state and is less than 100% duty ratio.

### Claim 9 (depends on 8)

The battery pack of claim 8, wherein
the battery controller is configured to output a PWM signal having a duty ratio of 100% to the switch driving circuit to close the switch when the acceleration magnitude is less than the first threshold value, and
the battery controller is configured to output a PWM signal having a duty ratio of 0% to the switch driving circuit to open the switch when the acceleration magnitude is greater than or equal to the second threshold value.

### Claim 10 (depends on 8)

The battery pack of claim 8, wherein the battery controller is configured to output a PWM signal having a duty ratio of 0% to the switch driving circuit in response to receiving a collision information signal generated by a collision sensor.

### Claim 11 (depends on 7)

The battery pack of claim 7, wherein the battery controller is configured to output a PWM signal having a duty ratio monotonically decreasing according to the acceleration magnitude and in a duty ratio range between a minimum duty ratio for maintaining the switch in a closed state and 100% duty ratio when the acceleration magnitude is less than a first threshold value.

### Claim 12 (depends on 7)

The battery pack of claim 7, wherein
the acceleration signal comprises a longitudinal acceleration signal and a lateral acceleration signal, and
the battery controller is configured to output a PWM signal having a first duty ratio to the switch driving circuit when at least one selected from a longitudinal acceleration magnitude of the longitudinal acceleration signal and a lateral acceleration magnitude of the lateral acceleration signal is greater than or equal to a first threshold value and less than a second threshold value.