Battery module for detecting high temperature of battery cell
AssigneeLG Chem, Ltd.
InventorsKyung Jik KIM, Jin Hyun LEE, Young Su SON
Life of this patent
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Abstract
A battery module according to an embodiment of the present invention is composed of a plurality of battery cells. The battery module includes one positive (+) output terminal formed by connecting the plurality of battery cells, a field effect transistor (FET) provided on a current path between the positive (+) output terminal and an external device to block charging or discharging of a battery module, a protection integrated circuit (IC) chip for controlling the FET, and a high temperature detector for detecting whether the battery module is above a predetermined temperature and including a plurality of positive temperature coefficient (PTC) thermistors connected in series with each other.
Claims12
A battery module composed of a plurality of battery cells, the battery module comprising:
- one positive output terminal connected to the plurality of battery cells;
- a field effect transistor (FET) provided on a current path between the positive output terminal and an external device to block charging or discharging of the battery module;
- a protection integrated circuit (IC) chip configured to control the FET;
- and
- a high temperature detector configured to detect whether a temperature of the battery module is above a predetermined temperature,
- wherein a first end of the high temperature detector is connected to the positive output terminal,
- wherein a second end of the high temperature detector is connected to one input port of the protection IC chip, and
- wherein the high temperature detector includes a plurality of positive temperature coefficient (PTC) thermistors connected in series with each other.
A battery module composed of a plurality of battery cells, the battery module comprising:
- one positive output terminal connected to the plurality of battery cells;
- a field effect transistor (FET) provided on a current path between the positive output terminal and an external device;
- a protection integrated circuit (IC) chip configured to control the FET;
- a plurality of thermal films, each thermal film surrounding a respective one of the battery cells;
- and
- a high temperature detector configured to detect whether a temperature of the battery module is above a predetermined temperature,
- wherein a first end of the high temperature detector is connected to the positive output terminal,
- wherein a second end of the high temperature detector is connected to one input port of the protection IC chip, and
- wherein the high temperature detector includes a plurality of PTC thermistors connected in series with each other.
A method for detecting a high temperature in a battery module composed of a plurality of battery cells, the method comprising:
- a voltage measurement step of measuring a voltage applied to one input port of a protection IC chip;
- a high temperature determination step of determining whether any one of the plurality of battery cells has a temperature above a predetermined temperature based on the measured voltage;
- and
- a charging or discharging blocking step of blocking charging or discharging of the battery module when it is determined that the temperature of at least one battery cell among the plurality of battery cells is above the predetermined temperature in the high temperature determination step,
- wherein the voltage applied to the one input port of the protection IC chip varies by a plurality of positive temperature coefficient (PTC) thermistors provided in contact with each of the plurality of battery cells, the plurality of PTC thermistors are connected in series with each other.
Dependencies are inferred from the claim text.