Battery temperature raising system and control method thereof

Patent metadata

Field	Value
Publication number	US-9614262-B2
Application number	US-201414279802-A
Country	US
Kind code	B2
Filing date	May 16, 2014
Priority date	Nov 22, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A battery temperature raising system and a control method thereof are provided. The battery temperature raising system includes a power supply that operates a heater attached to a battery module. The heater is configured to increase a battery temperature and a variable resistor mounted on a circuit between the heater and the power supply adjusts a heating value of the heater based on an adjustment state of a resistance value. A heater relay is mounted on the circuit between the heater and the power supply and opens and closes the circuit to selectively turn on/off the heater. A first sensor senses the battery temperature and a second sensor senses a heater temperature. A controller outputs a control signal to operate the heater relay to selectively turn on/off the heater based on temperature information sensed by the sensors and a control signal to adjust the resistance value of the variable resistor.

First claim

What is claimed is:

1. A battery temperature raising system, comprising:
a power supply configured to operate a heater,
a heater disposed on a battery module and configured to increase a battery temperature by a heating operation;
a variable resistor disposed on a circuit between the heater and the power supply and configured to adjust a heating value of the heater based on an adjusted resistance value of the variable resistor, by an operator;
a heat relay mounted on the circuit between the heater and the power supply and configured to open and close the circuit to selectively turn the heater on and off;
a first sensor configured to sense the battery temperature;
a second sensor configured to sense a heater temperature; and
a controller configured to output a control signal to adjust the resistance value of the variable resistor based on deviation between the battery temperature and the heater temperature,
wherein the controller is set to decrease the resistance value of the variable resistor, in response to determining that deviation between the heater temperature and the battery temperature is equal to or less than a predetermined temperature deviation by comparing the deviation between the heater temperature and the battery temperature with the predetermined temperature deviation during the resistance value adjusting process.

2. The battery temperature raising system of claim 1 , wherein the controller is configured to:
turn on the heater relay when the battery temperature is less than a predetermined first reference temperature T1 and decrease the resistance value of the variable resistor when the battery temperature is in a cryogenic temperature state less than a second reference temperature T2 (T2<T1) to perform a resistance value adjusting process to increase a heat value of the heater.

3. The battery temperature raising system of claim 1 , wherein the controller is set to decrease the heating value of the heater by increasing the resistance value of the variable resistor when the deviation between the heater temperature and the battery temperature is greater than the predetermined temperature deviation during the resistance value adjusting process.

4. The battery temperature raising system of claim 2 , wherein the controller is configured to: increase the resistance value of the variable resistor to perform an additional resistance value adjusting process of decreasing the heating value of the heater, in response to determining that the battery temperature rises to a temperature greater than a third reference temperature by comparing the battery temperature with the predetermined third reference temperature T3 (T1>T3>T2) after the resistance value adjusting process.

5. The battery temperature raising system of claim 4 , wherein the controller is set to increase the resistance value of the variable resistor in response to determining that the deviation between the heater temperature and the battery temperature is equal to or less than the predetermined temperature deviation by comparing the deviation between the heater temperature and the battery temperature with the predetermined temperature deviation during the additional resistance value adjusting process.

6. The battery temperature raising system of claim 5 , wherein when the deviation between the heater temperature and the battery temperature is greater than the predetermined temperature deviation during the additional resistance value adjusting process, the controller is configured to increase the resistance value of the variable resistor to decrease the heating value of the heater and when the deviation between the heater temperature and the battery temperature is less than the predetermined temperature deviation, the controller is configured to additionally increase the resistance value of the variable resistor.

7. The battery temperature raising system of claim 1 , wherein the heater is a surface type heater attached to the battery module to increase the battery temperature.

8. The battery temperature raising system of claim 1 , wherein the heating value of the heater is decreased by increasing the resistance value of the variable resistor before the battery temperature rising process ends, to secure the safety of the battery even when the battery is continuously heated accidentally due to the failure of the system.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Dal
• Yoon Shin Hyuk

Classifications

• H01M10/486 Primary

  for measuring temperature · CPC title

• H01M10/0486

  Frames for plates or membranes · CPC title

• H01M2200/106

  PTC · CPC title

• H01M10/63 Primary

  Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486}) · CPC title

• H01M10/667

  the system being an electronic component, e.g. a CPU, an inverter or a capacitor · CPC title