Battery device, battery management system, and diagnosis method
AssigneeLG Energy Solution, Ltd.
InventorHojoon Lee
Life of this patent
Estimating the term…
Abstract
A processor of a battery device performs a precharge operation by closing a precharge switch during a precharge duration, closing a positive main switch in response to the precharge operation being complete, and diagnosing the precharge operation based on a voltage of a positive connection terminal measured when the positive main switch is about to be closed and the voltage of the positive connection terminal measured as soon as the positive main switch is closed.
Claims15
A battery device having a positive connection terminal and a negative connection terminal to be connected to an external device, comprising:
- a battery pack;
- a positive main switch connected between a positive terminal of the battery pack and the positive connection terminal;
- a precharge switch connected between the positive terminal of the battery pack and the positive connection terminal to control a precharge operation of a capacitor of the external device;
- and
- a processor configured to:
- perform a precharge operation by closing the precharge switch during a precharge duration;
- close the positive main switch in response to the precharge operation being complete;
- and
- diagnose the precharge operation based on a first voltage of the positive connection terminal when the precharge duration ends and before the positive main switch is closed and a second voltage of the positive connection terminal as soon as the positive main switch is closed.
A diagnosis method of a battery device including a battery pack, and a positive connection terminal and a negative connection terminal to be connected to an external device, comprising:
- precharging a capacitor connected to the positive connection terminal and the negative connection terminal through a precharge resistor during a precharge duration;
- applying a voltage of the battery pack to the positive connection terminal after performing the precharging;
- measuring a voltage of the positive connection terminal as a first voltage when the precharge duration ends and before the voltage of the battery pack is applied;
- measuring the voltage of the positive connection terminal as a second voltage as soon as the voltage of the battery pack is applied;
- and
- diagnosing the precharging based on the first voltage and the second voltage.
A battery management system of a battery device including a battery pack, and a positive connection terminal and a negative connection terminal to be connected to an external device, comprising:
- a positive main switch connected between a positive terminal of the battery pack and the positive connection terminal;
- a precharge switch connected between the positive terminal of the battery pack and the positive connection terminal to control a precharge operation of a capacitor of the external device;
- and
- a processor,
- wherein the processor is configured to:
- perform a precharge operation by closing the precharge switch during a precharge duration;
- close the positive main switch in response to the precharge operation being complete;
- and
- diagnose the precharge operation based on a first voltage of the positive connection terminal when the precharge duration ends and before the positive main switch is closed and a second voltage of the positive connection terminal as soon as the positive main switch is closed.
Dependencies are inferred from the claim text.