KR20120069334A - Battery protection apparatus for a battery car - Google Patents

Abstract

PURPOSE: A battery protection device for electric vehicle is provided to automatically spray fire extinguishing agent by detecting fire inside a member in which the battery is built. CONSTITUTION: A battery protection device for electric vehicle comprises a battery case in which battery supplying electricity to electric vehicles is built, a firing sensor(30) which senses firing generated inside the battery case, a fire extinguisher which extinguishes fire by spraying extinguishant inside the battery case, an opening and closing switch(60) which opens and closes outlet of the fire extinguisher, and a controller(70) which controls operation of the opening and closing switch by fire signal of the firing sensor.

Description

Battery Protector for Electric Vehicles {BATTERY PROTECTION APPARATUS FOR A BATTERY CAR}

The present invention relates to a battery protection device for an electric vehicle that can protect a battery by detecting and extinguishing a fire generated in a battery case in which a battery is embedded and exhausting and draining moisture generated in the battery case.

In general, electric vehicles use a battery composed of secondary batteries as a main power source. Such a battery generates a large amount of heat when electricity is supplied to the driving unit of the vehicle. In addition, the battery has a problem that a fire occurs when the generated heat reaches the ignition point.

Accordingly, the electric vehicle uses a cooling structure in a battery tray in which the battery is mounted to cool heat generated from the battery.

Such an electric vehicle is provided with a battery tray 1 for cooling the battery 3, as shown in FIG. The battery tray 1 cools the battery 3 in an air-cooled manner when the electric vehicle runs. At this time, the supply duct 9 of the battery tray 1 provides cooling air 7 for cooling the battery 3 to the seating portion 5 on which the battery 3 is seated.

In addition, the supply duct 9 is formed with a stepped tapered 8 therein. Therefore, the step 8 guides the cooling air 7 to reach from one end to the other end. Here, reference numeral 2 is a BMS (Battery Management System), 4 is a cooling fan, 6 is a cover member.

Therefore, the conventional battery tray 1 for an electric vehicle, when the battery 3 supplies electricity to the driving unit of the vehicle, supplies air to cool the heat.

However, the conventional battery tray 1 for an electric vehicle takes a long time to supply electricity from the battery 3 so that the battery 3 is overheated or the cooling of the battery 3 is not smoothly performed by external factors. If not, or if a short circuit occurs in the wires or connectors or PCB boards wired to the battery (3) there is a problem that a fire occurs.

In addition, there is a problem that the vehicle can be burned out because a device is not provided to detect the fire or automatically extinguish the generated fire.

In addition, when condensation generated by the heat of the battery 3 is stored in the battery tray 1, there is a problem in that corrosion occurs to reduce durability and shorten the lifespan.

The present invention has been made to solve this problem, it is an object of the present invention to provide a battery protection device for an electric vehicle that can eject a fire extinguishing agent by detecting a fire inside the member in which the battery is built.

In addition, the air-cooled battery is used to cool the battery, and in addition, air-cooled air inlet areas can be shielded in case of fire, and furthermore, a member for shielding air inlet-out parts can be quickly operated in a fire. Another object of the present invention is to provide a battery protection device for an electric vehicle that is configured to be capable of doing so.

In addition, another object of the present invention is to provide a battery protection device for an electric vehicle, which is configured to cool a battery by water cooling using cooling water.

In addition, it is another object to provide a battery protection device for an electric vehicle that can detect a fire by detecting temperature or flame or smoke.

In particular, it is another object of the present invention to provide a battery protection device for an electric vehicle that can apply a fire signal when a temperature sensing member measures a set temperature in a member in which the battery is embedded.

In addition, it is another object of the present invention to provide a battery protection device for an electric vehicle that can open and close the ejection outlet through which the extinguishing agent is ejected according to the fire detection signal.

On the contrary, it is another object of the present invention to provide a battery protection device for an electric vehicle that can extinguish a fire by automatically extinguishing a fire extinguishing agent only when the temperature sensed by the above-described battery reaches a set fire temperature. .

Furthermore, it is another object to provide a battery protection device for an electric vehicle that can extinguish a fire by ejecting a fire extinguishing agent for a set time.

On the contrary, another object of the present invention is to provide a battery protection device for an electric vehicle that can extinguish a fire by ejecting the extinguishing agent according to the ejection pressure of the extinguishing agent.

It is still another object to provide a battery protection device for an electric vehicle that can alert the driver of a fire.

Furthermore, it is another object of the present invention to provide a battery protection device for an electric vehicle that can transmit a state in which an internal device of a member in which a battery is embedded or an occurrence of fire is transmitted to a battery management system.

Furthermore, it is another object to provide a battery protection device for an electric vehicle that can be initialized and restarted in the event of malfunction of a member detecting or extinguishing a fire.

On the other hand, it is another object of the present invention to provide a battery protection device for an electric vehicle that can exhaust and discharge moisture or fresh water in advance by detecting the level of fresh water due to humidity, temperature, or condensation generated in the member in which the battery is embedded.

In addition, it is possible to cool the battery by inflowing air into the member in which the battery is embedded, and in addition, to provide a battery protection device for an electric vehicle that can remove foreign substances and moisture from the air flowing into the member in which the battery is embedded. Another purpose.

On the contrary, another object of the present invention is to provide a battery protection device for an automobile capable of cooling the battery by circulating the coolant through a member in which the battery is embedded.

In addition, it is another object to provide a battery protection device for an electric vehicle that can operate at a set water level.

On the contrary, another object is to provide a battery protection device for an electric vehicle that can operate at a set humidity.

On the other hand, it is another object to provide a battery protection device for an electric vehicle that can operate at a set humidity and temperature.

In addition, it is another object to provide a battery protection device for an electric vehicle that is exhausted and drained by electromagnetic force.

In particular, it is another object of the present invention to provide a battery protection device for an electric vehicle capable of draining fresh water by automatically opening and closing a part of a member in which a battery is built according to the water level due to condensation.

On the contrary, it is another object of the present invention to provide a battery protection device for an electric vehicle that can automatically open and close a part of a member in which a battery is built in accordance with humidity to exhaust moisture.

On the other hand, it is another object of the present invention to provide a battery protection device for an electric vehicle that can exhaust moisture by automatically opening and closing a part of a member having a battery by comparing humidity and temperature.

Furthermore, a battery protection device for an electric vehicle that can automatically open and close part of the battery-embedded member according to the internal wind speed of the battery-embedded member to exhaust moisture or circulate air to prevent generation of condensation. It is another purpose to provide.

In addition, it is another object of the present invention to provide a battery protection device for an electric vehicle that can transmit the internal state of the member in which the battery is embedded to the battery management system.

Furthermore, it is another object to provide a battery protection device for an electric vehicle that can be initialized and restarted in case of malfunction of a member that detects or discharges moisture or fresh water.

The present invention for achieving the above object, the battery case is built in the battery for supplying power to the electric vehicle; A fire detection sensor detecting a fire generated inside the battery case; A fire extinguisher for extinguishing a fire by injecting a fire extinguishing agent into the battery case; A switch for opening and closing the outlet of the fire extinguisher; And a controller for controlling the operation of the switch by a fire signal of the fire detection sensor.

The battery case may be configured to be air-cooled to cool the battery with air while air is introduced to one side and discharged to the other side.

The present invention further includes a plurality of door units for opening and closing the inlet and the outlet of the air flowing into the battery case, respectively, the door unit comprising: a driving member for providing a driving force; And a door that is driven by the driving member to open and close the inlet and the outlet.

The battery case may be configured to cool the battery while being disposed outside the battery and having a heat sink having a communication hole for communicating and circulating the cooling water cooled by the radiator of the electric vehicle.

The fire sensor may be configured, for example, at least one of a temperature sensor for detecting a temperature generated from the battery case, a flame sensor for detecting a flame, or a smoke sensor for detecting smoke.

The controller, for example, a signal receiving unit for receiving a fire signal from the fire detection sensor; A signal transmitter for applying an open signal or a closed signal to the switch; And a controller for controlling the operation of the signal transmitter according to the fire signal of the signal receiver to open and close the outlet of the fire extinguisher through the switch.

In contrast, the controller, for example, a signal receiving unit for receiving a temperature signal from the fire detection sensor; A comparison unit which compares whether the temperature of the temperature signal received by the signal reception unit corresponds to a pre-stored fire temperature and transmits a corresponding signal or a corresponding signal; A signal transmitter for applying an open signal or a closed signal to the switch by a non-corresponding signal of the comparator or a corresponding signal; And a controller for controlling the operation of the signal transmitter, the comparator and the signal receiver to open and close the outlet of the fire extinguisher through the switch.

The controller may further include a counting unit that counts the set opening time of the switch so that the controller opens the switch for a predetermined time.

The controller may further include a pressure sensor for measuring the pressure of the extinguishing agent ejected from the switch so that the ejection outlet of the extinguisher is closed in accordance with the pressure of the extinguishing agent ejected.

The controller may further include an alarm that operates by a fire signal detected by the fire detection sensor.

The controller may further include an interface for transmitting a fire signal of the fire detection sensor or a control state of the switch to the battery management unit of the vehicle.

The present invention, the error detection unit for detecting a malfunction of the fire sensor or the controller; A reset unit for initializing the fire detection sensor and the controller by the detection signal of the error detection unit; And a reactivation detector configured to detect reactivation of the fire detection sensor and the controller by initialization of the reset unit, and to transmit a warning signal to the battery management unit of the vehicle when it is detected as non-operation.

The present invention includes a sensor member provided on one side of the battery case for sensing at least one of humidity or water level or temperature of fresh water stored in the battery case; A switch that opens a portion of the battery case to exhaust air in the battery case to the outside or to drain fresh water collected in the battery case to the outside; And a controller for controlling the operation of the switch by the detection signal of the sensor member.

The sensor member is a water level sensor for detecting the level of fresh water collected in the battery case; A humidity sensor for sensing humidity of the battery case; A humidity sensor for sensing humidity of the battery case; A temperature sensor measuring a temperature of the battery case; It is characterized by at least one of.

The switch is a valve member for opening and closing the drain drain formed on the bottom of the battery case; And a solenoid valve provided with a rod to which the valve member is connected, opening and closing the drainage drain by moving the valve member by a stretched rod, and controlled by the controller.

According to the present invention as described above, since the switch operates in response to the fire signal of the fire sensor, the fire outlet of the fire extinguisher is opened and closed to automatically extinguish the fire generated in the battery case.

In addition, since the battery case cools the battery by air cooling, the battery cooling device can be easily configured. In addition, since the door unit opens and closes the air inlet and outlet, the oxygen supply can be interrupted by blocking the air inside the battery case in case of fire. Not only this, it is possible to prevent the spread of fire, and furthermore, the door unit is composed of a drive member and the door can quickly close the inlet and outlet of the air can be put out the fire quickly.

In addition, when a heat sink is provided in the battery case, the battery may be cooled by water cooling, and thus the battery may be cooled more rapidly than by air cooling.

In addition, the fire sensor can detect the temperature, flame or smoke can quickly detect the fire in a variety of ways.

In particular, since the fire detection sensor applies a fire signal only at a set fire temperature, it is possible to accurately detect a fire.

In addition, the controller controls the switch according to the fire signal to open and close the outlet of the fire extinguisher, so that the fire can be extinguished at the same time as the fire occurs.

On the contrary, since the controller controls the switch only when it corresponds to the fire temperature by comparing the temperature sensed by the battery case with the set fire temperature, it is possible to accurately control the fire extinguishing agent ejection of the fire extinguisher.

Moreover, the controller can extinguish the fire by releasing the extinguishing agent for a set time so that the fire that is generated can be completely extinguished.

On the contrary, since the controller operates by the ejection pressure of the extinguishing agent, it is possible to stop the operation of the switch when the extinguishing agent is exhausted.

Subsequently, since the alarm warns of the occurrence of a fire, the driver can easily cope with the fire.

Furthermore, when the interface is provided, the operation state of the switch installed in the battery case or the fire information generated from the battery case can be transmitted to the battery management unit, thereby managing the battery more safely.

In addition, the error detection unit and the reset unit detect a malfunction of the fire detection sensor and the switch, initialize the fire detection sensor and the controller, and restart the fire detection sensor. Not only can the sensor and switch malfunction be corrected quickly, but the fire sensor and switch can be operated stably.

On the other hand, according to the moisture or fresh water level or temperature detected by the sensor member, the switch discharges the air or fresh water inside the battery case to the outside, it is possible to prevent the battery of the battery case is short-circuited or corroded by moisture or condensation.

In addition, air is introduced into the battery case through the duct, so that air can be smoothly guided into the battery case, and in addition, the filter filters foreign matter and moisture from the air flowing into the battery case, thereby introducing moisture into the battery case. Can be lowered.

In contrast, the coolant cooled through the heatsink circulates, allowing the battery to cool faster than air-cooled.

In addition, when the sensor member is composed of a water level sensor, it is possible to operate the switch according to the fresh water level due to the condensation stored in the battery case.

On the contrary, when the sensor member is configured as a humidity sensor, the switch may be operated according to the humidity inside the battery case.

On the other hand, when the sensor member is composed of a humidity sensor and a temperature sensor can operate the switch according to the humidity and temperature inside the battery case.

In addition, since the valve member of the switch is operated by a solenoid valve operated by electromagnetic force, it is possible to automatically open and close the drainage drain of the battery case automatically.

In addition, when the controller operates the switch by the water level signal, the fresh water can be drained from the set water level, thereby preventing the fresh water from being stored in the battery case more than the set amount.

On the contrary, when the controller operates the switch by comparing the humidity and the set humidity of the battery case, the controller may exhaust the air inside the battery case at the set humidity, thereby preventing the condensation generation environment from being formed inside the battery case.

On the other hand, when the controller operates the fan or fan and the switch by comparing the humidity and temperature to the dew point, the air is forced to circulate inside the battery case to exhaust the air to the other side of the battery case or through the part of the battery case. Because it can be exhausted by the moisture in the battery case to prevent condensation can be prevented from occurring condensation in advance.

In addition, when the wind speed sensor is provided, the above-described fan can be operated according to the internal wind speed of the battery case, so that the fan can be operated efficiently.

In addition, when the interface is provided, the internal humidity, water level, or temperature of the battery case can be transmitted to the battery management unit, so that the battery can be managed more safely.

In addition, the error detection unit and the reset unit detects malfunctions of the sensor member and the switch, and initializes the sensor member and the controller, and restarts the sensor member and the controller. Not only can the malfunction be corrected quickly, but also the sensor member and the switch can be stably operated.

1 is a side view schematically showing a conventional battery tray for an electric vehicle.
Figure 2 is a side cross-sectional view schematically showing a battery protection device for an electric vehicle according to an embodiment of the present invention.
Figure 3 is a block diagram showing the configuration of the fire protection device shown in FIG.
4 is a block diagram showing another embodiment of the sensor member and controller shown in FIG.
5 is a perspective view schematically showing another embodiment of the battery case shown in FIG.
6 is a side cross-sectional view schematically showing the battery case shown in FIG.
Figure 7 is a side cross-sectional view schematically showing a battery protection device for an electric vehicle according to another embodiment of the present invention.
8 is a block diagram schematically showing the configuration of the present invention to which the water level sensor is applied.
Figure 9 is a schematic block diagram showing the configuration of the present invention to which the humidity sensor is applied.
Figure 10 is a schematic block diagram showing the configuration of the present invention to which the water level sensor and the temperature sensor is applied.
11 is a graph plotting dew point temperature.
12 is a block diagram schematically showing the configuration of the present invention to which the humidity sensor, the temperature sensor and the wind speed sensor are applied.
Figure 13 is a side cross-sectional view schematically showing a battery protection device for an electric vehicle according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

2, the battery protection apparatus for an electric vehicle according to an embodiment of the present invention includes a battery case 10, a fire sensor 30, a fire extinguisher 50, a switch 60, and a controller 70. Can be configured.

The battery case 10 is mounted to an electric vehicle not shown. The battery case 10 includes a battery B for supplying a charging current to the electric vehicle described above.

The battery case 10 is provided with a flow path 11 for guiding the external air introduced to one side to be discharged to the other side while contacting the battery B to cool the built-in battery B by air cooling. In addition, in the battery case 10, a plurality of ducts 13 may be respectively connected to the inlet and the outlet of the flow path 11. The plurality of ducts 13 flows outside air into the flow path 11 and discharges the inside air supplied to the flow path 11 to the outside. That is, the duct 13 is an entrance through which air flows in and out. Therefore, the battery case 10 cools the battery B by air cooling.

Here, the duct 13 may further include a plurality of door units 20 operated by the controller 70 to open and close the plurality of ducts 13. That is, the door unit 20 opens and closes the inlet and outlet of the air. The door unit 20 may be configured to include, for example, a driving member 21 and a door 23. Drive member 21 is composed of a cylinder or a solenoid actuator having a rod as shown to provide a driving force to the door (23). The door 23 opens and closes the duct 13 by the driving member 21.

The door 23 may be provided with a packing 25 on the rim as shown. The packing 25 seals between the duct 13 and the door 23. Such, the packing 25 may be composed of a rubber ring installed on the edge of the door (23). On the contrary, the packing 25 may be made of a rubber ring installed on the inner circumferential surface of the duct 13 to be in close contact with the edge of the door 23 that is closed. The packing 25 may be in close contact with the edge of the door 23 when the door 23 is closed to block the movement of air. That is, the packing 25 seals the duct 13 in an airtight state. Therefore, the door unit 20 blocks the oxygen supply by making the battery case 10 in a vacuum state in case of fire. Of course, the fire does not spread as the oxygen supply is cut off and is extinguished more quickly.

The fire sensor 30 may be configured of at least one of a temperature sensor 31, a flame sensor 33, and a smoke sensor 35 to detect a temperature, flame, or smoke generated from the battery case 10. Accordingly, the fire detection sensor 30 may detect a fire generated from the battery case 10 by the sensors 31 to 35.

Here, the above-described temperature sensor 31 may be configured as a differential sensor, a constant temperature sensor or a thermistor sensor. In addition, the flame sensor 33 may be configured as an illuminance sensor or an ultraviolet sensor or a photo sensor for detecting light. The smoke sensor 35 may be configured as a photoelectric sensor or an ionization sensor.

The temperature sensor 31 may be configured to measure the internal temperature of the battery case 10 and to apply a fire signal to the controller 70 when detecting that the measured temperature corresponds to a preset fire temperature. The temperature sensor 31 may be configured as, for example, a measuring unit and a sensing unit. The measurement unit measures the internal temperature of the battery case 10. The detection unit is set to a temperature that is determined to be a fire compares the temperature measured by the measurement unit with the preset fire temperature, and if the fire temperature corresponds to the detection signal for detecting the fire to the controller 70.

The fire extinguisher 50 may be configured as a tank filled with a fire extinguishing agent or a compression pack filled with a fire extinguishing agent in a compressed state. Therefore, the fire extinguisher 50 may spray a fire extinguishing agent in case of fire.

The switch 60 is controlled by the controller 70 to open and close the blower outlet of the fire extinguisher 50. This, the switch 60 comprises a solenoid valve 53 having a valve member 51 for opening and closing the outlet of the fire extinguisher 50 and the rod 55 for operating the valve member 51 as shown in an enlarged view Can be.

The valve member 51 is fixed to the end of the rod 55 to directly open and close the outlet of the fire extinguisher 50. The solenoid valve 53 expands and contracts the rod 55. Therefore, the solenoid valve 53 moves the valve member 51 to open and close the blower outlet of the fire extinguisher 50.

The controller 70 controls the operation of the switch 60 according to the sensing of the fire detection sensor 30. Such a controller 70 may be composed of a microprocessor and a memory in which a program is embedded.

On the other hand, the above-described fire detection sensor 30 is configured as shown in plurality may be distributedly installed in the battery case 10. Therefore, the fire detection sensor 30 checks several places of the battery case 10 at a time to easily check the ignition point of the fire.

On the other hand, the battery case 10 may be installed with the exhaust fan not shown together with the above-described door unit 20. The exhaust fan reduces the amount of oxygen inside the battery case 10 by discharging the internal air of the battery case 10 to the outside when the door unit 20 shields the duct 13 in case of fire. Thus, fire extinguishes more quickly. Of course, the exhaust fan should be installed in the exhaust hole after forming the exhaust hole not shown in the battery case 10. The exhaust hole may be provided with a check valve not shown. The check valve is composed of a thin film disk is installed in the exhaust hole, the air by the exhaust fan is discharged to the exhaust hole, and the outside air is prevented from entering the exhaust hole. When the thin film disk is configured to be supported by an elastic body that is compressed by the wind pressure of the exhaust fan, it can smoothly perform the role of a check valve. Since such a check valve is a conventional check valve, detailed description thereof will be omitted.

Referring to FIG. 3, the fire detection sensor 30 may include, for example, a flame sensor 33 or a smoke sensor 35 as shown. Of course, the fire sensor 30 may be composed of a flame sensor 33 and the smoke sensor 35 together. The flame sensor 33 and the smoke sensor 35 applies a fire signal when a flame or smoke is detected.

The controller 70 may include, for example, a signal receiver 71, a signal transmitter 73, and a controller 77 as illustrated.

The signal receiver 71 receives a fire signal from the flame sensor 33 or the smoke sensor 35. The signal transmitter 73 applies an open signal or a closed signal to the opener 60. The controller 77 controls the operation of the signal transmitter 73 according to the fire signal of the signal receiver 71. Therefore, the switch 60 opens and closes the blower outlet of the fire extinguisher according to the open / close signal of the signal transmitter 73.

The water level signal is received from the water level sensor 31. The signal transmitter 73 applies an open signal or a closed signal to the switch 60. The controller 77 controls the signal receiver 71, the signal transmitter 73, and the counting unit 75 to control the switch 60 according to the water level signal received from the signal receiver 71.

The controller 70 as described above operates as follows.

First, the flame sensor 33 or the smoke sensor 35 detects when a flame or smoke is generated in the battery case 10 and transmits a fire signal to the signal receiver 71. That is, the flame sensor 33 or the smoke sensor 35 transmits a fire signal in case of fire. Subsequently, the signal receiver 71 receives the fire signal and transmits it to the controller 77. Subsequently, the control unit 77 controls the signal transmitting unit 73 to transmit the open signal to the switch 60 according to the fire signal. The switch 60 opens the outlet of the fire extinguisher 50 in case of fire. At this time, the fire extinguisher 50 ejects the extinguishing agent to extinguish the fire. Accordingly, the battery case 10 is initially extinguished with fire.

On the other hand, the above-described controller 70 may further comprise a counting unit 75 as shown. This, the counting unit 75 counts the set opening time of the switch 60. When the counting unit 75 is provided, the controller 77 controls the signal transmitting unit 73 and simultaneously operates the counting unit 75. In addition, the controller 77 controls the signal transmitter 73 to apply the closing signal to the switch 60 after the counting of the counting unit 75 is completed. That is, the switch 60 opens the outlet of the fire extinguisher 50 for a set time. Accordingly, the fire extinguisher 50 may fully extinguish the fire extinguishing agent for a predetermined time to completely extinguish the fire generated from the battery case 10. Of course, the switch 60 is opened and closed for a set time so that it is prevented from operating for an unnecessary time.

Alternatively, the controller 70 described above may further include a pressure sensor 61 as shown. The pressure sensor 61 measures the ejection pressure of the extinguishing agent ejected from the fire extinguisher 50. That is, the pressure sensor 61 is a sensor for measuring that the ejection pressure of the extinguishing agent is lowered below the set pressure. Therefore, when the pressure sensor 61 is provided, the control unit 77 opens and operates the switch 60 until the ejection pressure of the extinguishing agent ejected from the fire extinguisher 50 is weakened. Therefore, the fire extinguisher 50 is automatically closed by the switch 60 when the extinguishing agent is exhausted. Of course, the switch 60 is prevented from unnecessary operation because it is closed by the control unit 77 when the extinguishing agent is exhausted.

On the other hand, the above-described controller 70 may be configured to further include an alarm (80) for alerting by the sensing of the fire sensor 30 as shown. Therefore, when the alarm 80 is installed, the controller 70 is controlled and controlled by the controller 77 according to the sensing of the fire detection sensor 30. Accordingly, the driver can quickly respond to the alarm of the alarm 80 and extinguish the fire.

In addition, the controller 70 may further include an interface 72 as shown. The interface 72 transmits the fire information by the operation state of the switch 60 and the fire signal of the fire detection sensor 30 to the battery management unit BM of the vehicle. Therefore, the battery manager BM may not only notify the driver of the internal state of the battery case 10 according to the operation state of the switch 60 or the fire accident in the battery case 10, but also operate the switch 60. The battery B can be easily managed by storing state and fire occurrence data.

Here, the above-described battery management unit (BM) is provided in the electric vehicle is a device for storing and managing the history of the switch 60 and the fire detection sensor 30 to the data.

The controller 70 may further include an error detecting unit 74, a reset unit 76, and a reactivation detecting unit 78 as shown.

The error detection unit 74 detects a malfunction of the fire detection sensor 30 or the switch 60. That is, the error detection unit 74 transmits a test signal to the temperature sensor 31, the flame sensor 33, the smoke sensor 35, or the controller 70, which are the above-described fire detection sensor 30, respectively, and is fed back to the signal. Detects whether the error is detected, or whether the error by the operating signal applied during operation in the fire detection sensor 30 and the controller (70).

The reset unit 76 initializes the fire detection sensor 30 and the controller 70 by the detection signal of the error detection unit 74.

The reactivation detection unit 78 detects that the fire detection sensor 30 and the controller 70 are reactivated by the initialization of the reset unit 76, and if a non-operation is detected, a warning signal is transmitted to the battery management unit BM of the vehicle. To be sent).

 In the controller 70 as described above, the error detecting unit 74 intermittently transmits a test signal to the fire detection sensor 30 and the controller 70 and detects a signal fed back. At this time, the error detecting unit 74 transmits an abnormal signal for the corresponding part to the controller 77 while determining that the test signal is not fed back and malfunctioning. Therefore, the control unit 77 controls the reset unit 76 according to the reception of the abnormal signal.

Subsequently, the reset unit 76 is controlled by the control unit 77 to initialize and restart the fire detection sensor 30 and the controller 70. In addition, the reactivation detection unit 78 detects the operating state of the fire detection sensor 30 and the controller 70 controlled by the control unit 77, the fire detection sensor 30 and the controller 70 is inoperative If detected, the warning signal is transmitted to the battery management unit (BM). In this case, the reactivation detecting unit 78 may detect a reactivation state by detecting an operation signal applied from the fire detection sensor 30 and the controller 70.

Referring to FIG. 4, the fire detection sensor 30 may be configured of, for example, a temperature sensor 31 as shown. The controller 70 may include, for example, a signal receiver 71, a comparator 79, a signal transmitter 73, and a controller 77 as illustrated.

Here, the controller 70 is the pressure sensor 61, the interface 72, the counting unit 75, the error detection unit 74, the reset unit 76, the reactivation detection unit 78, the alarm 80 described above. ) And the battery management unit (BM) may be equally applied. Therefore, the description of their configuration and operation will be omitted.

The signal receiver 71 receives a temperature signal from the temperature sensor 31. The comparing unit 79 compares the temperature of the temperature signal received by the signal receiving unit 71 with the fire temperature set in the above-described memory, and transmits a fire temperature undersignal signal or a fire temperature coincidence signal. The signal transmitter 73 applies an open signal or a closed signal to the switch 60 by the under signal or the coincidence signal of the comparator 79. The controller 77 controls the signal receiver 71, the comparator 79, and the signal transmitter 73 to control the switch 60 according to the fire signal received by the signal receiver 71. Therefore, the fire extinguisher 50 automatically ejects the extinguishing agent in case of fire.

Here, the fire temperature is a temperature formed when the internal parts of the battery B or the battery case 10 (eg, a circuit board or an electric wire) ignite. This temperature is set by repeated experiments.

The controller 70 configured as described above transmits the temperature signal to the signal receiver 71 by sensing the internal temperature of the battery case 10 by the temperature sensor 31. Subsequently, the signal receiver 71 receives the temperature signal and transmits it to the comparator 79. Subsequently, the comparator 79 compares the temperature of the temperature signal with a preset set temperature and transmits a fire temperature coincidence signal to the signal transmitter 73 when it matches the set fire temperature. The signal transmitter 73 is controlled by the controller 77 to apply an open signal to the switch 60. The controller 77 controls the signal transmitter 73 to transmit an open signal according to the temperature signal. Therefore, the switch 60 opens the ejection opening of the fire extinguisher 50 in the battery case 10 described above to eject the extinguishing agent.

On the other hand, the controller 70 may omit the above-described comparator 79 when the temperature sensor 31 is configured to apply a fire signal by detecting the set fire temperature.

Referring to FIG. 5, the above-described battery case 10 may have a block type heat sink H having a communication hole Ha on the outside of the battery B, as shown. This heat sink (H) is circulated as the coolant cooled in the radiator (R) communicates with the communication hole (Ha) and then flows back into the radiator (R) as shown. Therefore, the heat sink H circulates the cooling water to cool the battery B.

Here, the above-described battery (B) may be built in a box-shaped cover, the heat sink (H) may be installed on the outside of the cover. That is, the heat sink H may be installed outside the battery B through the cover. Alternatively, the heat sink H may be directly installed on the outside of the battery B without the cover.

Referring to FIG. 6, in the battery protection device for an electric vehicle having the heat sink H described above, the controller 70 operates the switch 60 in response to a fire signal of the fire detection sensor 30 to extinguish the fire extinguisher 50. Extinguish extinguishing agent from. Thus, the fire is initially extinguished.

Here, the heat sink H described above is also applicable to the air-cooled battery case 10 described above. That is, the battery case 10 may be configured in a form in which air-cooled air is circulated and water-cooled water is circulated. Therefore, the battery case 10 may significantly improve the cooling efficiency.

Hereinafter, another embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 7, the battery protection apparatus for an electric vehicle according to another embodiment of the present invention may include a sensor member 300, a switch 500, and a controller 700.

Here, the battery case 10 is a drain drain 15 is formed on the bottom. Accordingly, the drain drain 15 drains fresh water collected in the battery case 10 or exhausts internal air containing moisture of the battery case 10. In addition, the duct 13 is preferably provided with a filter (F) to filter the foreign matter or moisture in the incoming air. The filter F may be installed in the duct 13 on the inlet side or installed in the flow path 11, and may be formed of a nonwoven fabric that absorbs moisture while filtering foreign substances.

The sensor member 300 is a water level sensor 310, humidity sensor 330, temperature sensor 350 and the wind speed sensor to detect the fresh water, humidity, temperature and wind speed generated in the flow path 11 of the battery case 10 370 may be configured as at least one.

The switch 500 is installed in the flow path 11 of the battery case 10 to open and close the drain drain 15. The switch 500 may include a solenoid valve 530 having a valve member 510 and a rod 550.

Valve member 510 is made of a rubber material to directly open and close the drain drain 15 is fixed to the end of the rod 550. The solenoid valve 530 expands and contracts the rod 550. Accordingly, the solenoid valve 530 expands and contracts the rod 550 to open and close the drain drain 15 through the valve member 510.

The controller 700 controls the operation of the switch 500 according to the sensing of the sensor member 300. Such a program may be composed of an embedded microprocessor and a memory. In addition, the controller 700 may be used by adding a configuration to the above-described controller 70, or newly configured.

Meanwhile, the above-described battery case 10 may be manufactured separately from an electric vehicle not shown and installed in the electric vehicle. Alternatively, the body of the electric vehicle may be installed integrally with the electric vehicle by forming a floor. Since the battery case 10 is a content that can be easily changed by those skilled in the art, detailed description thereof will be omitted.

Referring to FIG. 8, the sensor member 300 may include, for example, a water level sensor 310 as shown.

The controller 700 may include, for example, a signal receiver 710, a signal transmitter 730, a counting unit 750, and a controller 770 as illustrated.

The signal receiver 710 receives the water level signal from the water level sensor 310. The signal transmitter 730 applies an open signal or a closed signal to the switch 500. The counting unit 750 counts the set opening time of the switch 500. The controller 770 controls the switch 500 for a set time according to the water level signal received from the signal receiver 710 by controlling the signal receiver 710, the signal transmitter 730 and the counting unit 750.

Hereinafter, the controller 700 operates as follows.

First, the water level sensor 310 detects the contact of the fresh water collected in the battery case 10 as the water level increases, and transmits a water level signal to the signal receiver 710. Subsequently, the signal receiver 710 receives the water level signal and transmits it to the controller 770. Subsequently, the controller 770 controls the signal transmitter 730 to transmit the open signal to the switch 500 according to the water level signal, and simultaneously operates the counting unit 750. The controller 770 controls the signal transmitter 730 to apply the closing signal to the switch 500 after the counting of the counting unit 750 is completed.

The switch 500 is controlled by the controller 700 as shown in FIG. 7 to open and drain the drain drain 15 of the battery case 10 for a counting time and then close the drain. Therefore, the battery case 10 may be kept dry.

Referring to FIG. 9, the sensor member 300 may be configured as, for example, a humidity sensor 330 as shown.

The controller 700 may include, for example, a signal receiver 710, a comparator 790, a signal transmitter 730, a counting unit 750, and a controller 770 as illustrated. Here, since the counting unit 750 is configured in the same manner as described above, a description of the configuration will be omitted.

The signal receiver 710 receives a humidity signal from the humidity sensor 330. The comparator 790 compares the humidity of the humidity signal received by the signal receiver 710 with the preset humidity in the above-described memory, and transmits a signal of under setting humidity or a matching humidity matching signal. The signal transmitter 730 applies an open signal or a closed signal to the switch 500 by the under signal or the coincidence signal of the comparator 790. The controller 770 controls the signal receiver 710, the comparator 790, the signal transmitter 730, and the counting unit 750 to open and close the switch 500 for a set time according to the humidity signal received from the signal receiver 710. ).

In addition, when the control unit 770 is set to control the fan 600 or is set to control the fan 600 and the switch 500 together, the control unit 770 controls the fan 600 or the fan 600 and the switch 500 together. Can be controlled.

Hereinafter, the controller 700 operates as follows.

First, the humidity sensor 330 detects the internal humidity of the battery case 10 and transmits a humidity signal to the signal receiver 710. Subsequently, the signal receiver 710 receives the humidity signal and transmits the humidity signal to the comparator 790. Subsequently, the comparing unit 790 compares the humidity of the humidity signal with the preset setting humidity and transmits a setting humidity matching signal to the signal transmitting unit 730 when it matches the setting humidity. The signal transmitter 730 is controlled by the controller 770 to apply an open signal to the switch 500. The controller 770 controls the signal transmitter 730 to transmit the open signal according to the humidity signal, and simultaneously controls the counting unit 750 to operate. In addition, the controller 770 controls the signal transmitter 730 to apply the closing signal to the switch 500 after the counting of the counting unit 750 is completed.

On the other hand, the signal transmitter 730 applies a closing signal to the switch 500 when a signal of under set humidity is applied.

Accordingly, the switch 500 opens and exhausts the drain drain 15 of the battery case 10 for a counting time and then closes it.

On the other hand, the controller 700 may further include a fan 600 as shown. This, the fan 600 is operated for a counting time by the above-described control unit 770 to exhaust the moisture through the above-described duct 13, or operate with the switch 500 to operate the above-described drain drain 15 The moisture can be exhausted through.

Referring to FIG. 10, the sensor member 300 may include, for example, a humidity sensor 330 and a temperature sensor 350 as shown.

The controller 700 may include, for example, a signal receiver 710, a comparator 790, a signal transmitter 730, a counting unit 750, a fan 600, and a controller 770 as illustrated. Can be. Here, since the counting unit 750 is configured in the same manner as described above, a description of the configuration will be omitted.

The signal receiver 710 receives a humidity signal and a temperature signal from the humidity sensor 330 and the temperature sensor 350. The comparator 790 compares whether the humidity and temperature of the humidity signal and the temperature signal received by the signal receiver 710 correspond to the dew point previously stored in the above-described memory, and transmits the corresponding signal or the corresponding signal. The signal transmitter 730 applies an open signal or a closed signal to the switch 500 according to a non-corresponding signal of the comparator 790 or a corresponding signal. The fan 600 circulates air forcibly in the flow path 11 of the battery case 10. The controller 770 controls the signal receiver 710, the comparator 790, the signal transmitter 730, the counting unit 750, and the fan 600 to receive the humidity signal and the temperature signal received from the signal receiver 710. Control the fan 600 or control the switch 500 for a set time according to.

Hereinafter, the controller 700 operates as follows.

First, the humidity sensor 330 and the temperature sensor 350 detects the humidity and temperature of the internal air in the flow path 11 of the battery case 10 and transmits a humidity signal and a temperature signal to the signal receiver 710. Subsequently, the signal receiver 710 receives the humidity signal and the temperature signal and transmits them to the comparator 790. Subsequently, the comparison unit 790 compares the humidity and temperature of the humidity signal and the temperature signal with a preset dew point, and transmits a dew point corresponding signal to the signal transmitter 730 when the dew point matches the dew point. The controller 770 controls the signal transmitter 730 to transmit an open signal to the switch 500 when the corresponding signal is applied from the comparator 790, or to operate the fan 600 and the counting unit 750. To control. In addition, the controller 770 controls the signal transmitter 730 to apply the closing signal to the switch 500 after the counting of the counting unit 750 is completed, or the fan 600 is stopped.

On the other hand, the signal transmitter 730 applies a closing signal to the switch 500 when a non-corresponding signal is applied.

Therefore, the fan 600 may circulate the internal air of the battery case 10 described above to prevent condensation of moisture so that dew point (condensation) is not formed. In addition, the switch 500 opens and exhausts the drain drain 15 of the battery case 10 for a counting time and then closes it.

11 is a graph plotting dew point temperature. Here, the dew point is stored in advance in the memory, and provided to the comparison unit 790 described above to compare with the humidity signal and the temperature signal. The above-described comparator 790 calculates the dew point as shown in the graph.

For example, if the temperature detected by the temperature sensor is 300 degrees and the amount of water vapor detected by the humidity sensor is 17.3 g / m3, the point is marked as A on the graph, and the dew point temperature is 20 degrees due to the saturated steam curve from this point. Is calculated. In this case, the comparator 790 determines that the air state inside the battery case 10 does not correspond to the dew point temperature, and when the temperature drops to 20 degrees while the humidity remains as it is, 17.3 g / ㎥, it corresponds to the dew point temperature. I judge it. In addition, the dew point corresponds to a case where the temperature of the water vapor is 9.48 g / m 3 and the temperature is 10 degrees or the temperature of the water vapor is 3.04 g / m 3 and the temperature is 300 degrees. Therefore, the above-described comparison unit 790 compares the dew point and the humidity signal and the humidity and temperature of the temperature signal calculated as described above coincide with each other.

Referring to FIG. 12, the controller 700 may further include a wind speed sensor 370. The wind speed sensor 370 measures the wind speed of the air flowing in the flow path 11 or the duct 11 of the battery case 10 and provides the wind speed signal to the signal receiver 710.

Hereinafter, the controller 700 operates as follows.

First, the wind speed sensor 370 detects the wind speed of the internal air moving in the flow path 11 of the battery case 10 and transmits a wind speed signal to the signal receiver 710. Subsequently, the signal receiver 710 receives the wind speed signal and transmits it to the comparator 790. In addition, the comparing unit 790 compares the wind speed signal received by the signal receiving unit 710 with the reference wind speed value preset and stored in the above-described memory, and transmits a wind speed underspeed signal or a wind speed matching signal to the signal transmitting unit 730. . The signal transmitter 730 is controlled by the controller 770 to apply an open signal to the switch 500.

In addition, the controller 770 operates the counting unit 750 together with the open signal transmission of the signal transmitter 730 according to the wind velocity matching signal. The controller 770 controls the signal transmitter 730 to apply the closing signal to the switch 500 after the counting of the counting unit 750 is completed. In addition, the control unit 770 may operate the fan 600 or the switch 500 together with the fan 600 according to the wind velocity matching signal. Here, the controller 770 is preferably set in advance to control the fan 600 or the switch 500, respectively, or together according to the wind speed signal.

On the other hand, the signal transmitter 730 applies a closing signal to the switch 500 when the wind speed short signal is applied.

Therefore, the fan 600 circulates the air inside the battery case 10 described above. That is, since the dew point may be formed when the wind speed inside the battery case 10 is relatively weak by the wind speed sensor 370, the fan 600 may circulate air to prevent the dew point formation. In addition, the switch 500 may open the drain drain 15 of the battery case 10 to exhaust the internal air of the battery case 10 to prevent dew point formation.

Referring to FIG. 13, the battery protection device for an electric vehicle having the heat sink H described above may receive fresh water due to moisture or condensation generated inside the battery case 10 due to a temperature difference between the battery B and the cooling water. Discharge to the outside. Of course, such a battery protection device for an electric vehicle discharges moisture or fresh water by the sensor member 300, the switch 500 and the controller 700 described above. In addition, the battery protection device for the electric vehicle may drain fresh water at the water level set by the controller 700, and alternatively, prevent the generation of fresh water by discharging moisture at the set humidity. It can also be discharged to prevent the generation of fresh water. Since this series of operations has been described above, detailed descriptions are omitted.

As described above, the battery protection device for an electric vehicle may cool the battery B more rapidly than air-cooled since the coolant cooled through the heat sink H is circulated.

Here, the heat sink H described above is also applicable to the air-cooled battery case 10 described above. That is, the battery case 10 may be configured in a form in which air-cooled air is circulated and water-cooled water is circulated. Therefore, the battery case 10 may significantly improve the cooling efficiency.

According to the present invention as described above, since the switch 60 operates in response to the fire signal of the fire sensor 30, the fire outlet of the fire extinguisher 50 is opened and closed to automatically extinguish the fire generated from the battery case 10 at an early stage. Can be.

In addition, since the battery case 10 cools the battery B by air cooling, the battery cooling device can be easily configured. In addition, since the door unit 20 opens and closes the inlet and outlet of the air, the battery case 10 of the battery case 10 Not only can the internal air be interrupted to stop the oxygen supply, but also to prevent the spread of fire, and furthermore, the door unit 20 is composed of the driving member 21 and the door 23 to control the inlet and outlet of the air. It can be closed quickly so that the fire can be put out quickly.

In addition, when the heat sink H is provided in the battery case 10, the battery B may be cooled by water cooling, and thus the battery B may be cooled faster than by air cooling.

In addition, the fire sensor 30 can detect the temperature or the flame or smoke, so that the fire can be quickly detected in various ways.

In particular, since the fire detection sensor 30 applies the fire signal only at the set fire temperature, it is possible to accurately detect the fire.

In addition, since the controller 70 controls the switch 60 in accordance with the fire signal to open and close the blower outlet of the fire extinguisher 50, it is possible to extinguish the fire at the same time as the fire occurs.

On the contrary, since the controller 70 controls the switch 60 only when it corresponds to the fire temperature by comparing the temperature sensed by the battery case 10 with the set fire temperature, the fire extinguishing agent 50 of the fire extinguisher 50 is precisely fired. Can be controlled.

In addition, the controller 70 may extinguish the fire by ejecting the extinguishing agent for a set time, thereby completely extinguishing the generated fire.

On the contrary, since the controller 70 operates by the ejection pressure of the extinguishing agent, it is possible to stop the operation of the switch when the extinguishing agent is exhausted.

Subsequently, since the alarm 80 warns of a fire, the driver can easily cope with the fire.

Furthermore, when the interface 72 is provided, since the operating state of the switch 60 installed in the battery case 10 or the fire information generated by the battery case 10 can be transmitted to the battery management unit, the battery B can be transferred. More secure management

In addition, the error detection unit 74 and the reset unit 76 detects a malfunction of the fire detection sensor 30 and the switch 60 and initializes and restarts the fire detection sensor 30 and the controller 70. Since the operation detection unit 78 checks the re-operation state of the fire detection sensor 30 and the controller 70 initialized, it is possible not only to quickly correct the malfunction of the fire detection sensor 30 and the switch 60, The fire sensor 30 and the switch 60 can be operated stably.

On the other hand, according to the moisture or fresh water level or temperature detected by the sensor member 300, the switch 500 discharges the air or fresh water inside the battery case 10 to the outside, so that the battery (B) of the battery case 10 It can prevent short circuit or corrosion by moisture or condensation.

In addition, since the filter F filters foreign substances and moisture in the air flowing into the battery case 10, the humidity of the battery case 10 may be reduced.

In addition, when the sensor member 300 is configured as the water level sensor 310, the switch 500 may be operated according to the fresh water level due to the condensation stored in the battery case 10.

On the contrary, when the sensor member 300 is configured as the humidity sensor 330, the switch 500 may be operated according to the humidity inside the battery case 10.

On the other hand, when the sensor member 300 is composed of the humidity sensor 330 and the temperature sensor 350 may operate the switch 500 according to the humidity and the temperature inside the battery case 10.

In addition, since the valve member 510 of the switch 50 is operated by the solenoid valve 530 which operates with electromagnetic force, the drain drain 15 of the battery case 10 can be opened and closed automatically and quickly.

In addition, when the controller 700 operates the switch 500 by the water level signal, the fresh water may be drained at the set water level, thereby preventing the fresh water from being stored in the battery case 10 more than the set amount.

On the contrary, when the controller 700 operates the switch 500 by comparing the humidity and the set humidity of the battery case 10, the controller 700 may exhaust the internal air of the battery case 10 at the set humidity. It is possible to prevent the condensation generation environment inside.

On the other hand, when the controller 700 operates the fan 600 or the fan 600 and the actuator 500 by comparing the humidity and the temperature with the dew point, the controller 700 circulates the air inside the battery case 10 to force the air. Can be exhausted to the other side of the battery case 10 or forcibly exhausted through a portion of the battery case 10 to prevent moisture from condensing inside the battery case 10 to prevent condensation from occurring in advance. have.

In addition, when the wind speed sensor is provided, the fan 600 may be operated according to the internal wind speed of the battery case 10, and thus the fan 600 may be efficiently operated.

In addition, when the interface 720 is provided, the internal humidity, the water level, or the temperature of the battery case 10 may be transmitted to the battery management unit BM, so that the battery B may be more safely managed.

In addition, when the heat sink H is installed in the battery case 10, the coolant cooled through the heat sink circulates, thereby allowing the battery B to be cooled more rapidly than air cooling.

Since the above-described embodiments are merely illustrative of the preferred embodiments of the present invention, the scope of application of the present invention is not limited to the above, and appropriate modifications are possible within the scope of the same idea. Therefore, since the shape and structure of each component shown in the embodiment of the present invention can be carried out by deformation, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

10: battery case
30: fire detection sensor
50: fire extinguisher
60: switchgear
70, 700: controller
300: sensor member
500: switchgear

Claims (14)

A battery case in which a battery for supplying power to the electric vehicle is embedded;
A fire detection sensor detecting a fire generated inside the battery case;
A fire extinguisher for extinguishing a fire by injecting a fire extinguishing agent into the battery case;
A switch for opening and closing the outlet of the fire extinguisher; And
And a controller for controlling the operation of the switch by a fire signal of the fire detection sensor. The method of claim 1,
The battery case is an air vehicle type battery protection device, characterized in that the air is cooled to the air while the air is introduced to one side and discharged to the other side. The method of claim 2,
A plurality of door units for opening and closing each of the inlet and outlet of the air flowing into the battery case further;
The door unit,
A driving member providing a driving force; And
And a door which is driven by the driving member to open and close the inlet and outlet. The method of claim 1, wherein the battery case,
A battery protector for an electric vehicle installed on the outside of the battery and having a heat sink having a communication hole for communicating and circulating the coolant cooled by a radiator of the electric vehicle, thereby cooling the battery while circulating the coolant. The method of claim 1, wherein the fire detection sensor,
The battery protection device for an electric vehicle, characterized in that at least any one of a temperature sensor for sensing the temperature generated from the battery case, a flame sensor for detecting the flame, or a smoke sensor for detecting the smoke. The method of claim 1, wherein the controller,
A signal receiving unit receiving a fire signal from the fire detection sensor;
A signal transmitter for applying an open signal or a closed signal to the switch; And
And a control unit for controlling the operation of the signal transmitter according to the fire signal of the signal receiver to open and close the outlet of the fire extinguisher through the switch. The method of claim 1, wherein the controller,
A signal receiver which receives a temperature signal from the fire detection sensor;
A comparison unit which compares whether the temperature of the temperature signal received by the signal reception unit corresponds to a pre-stored fire temperature and transmits a corresponding signal or a corresponding signal;
A signal transmitter for applying an open signal or a closed signal to the switch by a non-corresponding signal of the comparator or a corresponding signal; And
And a control unit for controlling the operation of the signal transmitter, the comparator and the signal receiver to open and close the outlet of the fire extinguisher through the switch. The method of claim 6 or 7, wherein the controller,
And a counting unit for counting the set opening time of the switch so that the control unit opens and operates the switch for a predetermined time. The method of claim 6 or 7, wherein the controller,
And a pressure sensor for measuring the pressure of the extinguishing agent ejected from the switch so that the ejection outlet of the extinguisher is closed in accordance with the pressure of the extinguishing agent ejected. The method of claim 6 or 7, wherein the controller,
And an interface for transmitting a fire signal of the fire detection sensor or a control state of the switch to a battery management unit of the vehicle. The method according to claim 6 or 7,
An error detection unit for detecting a malfunction of the fire detection sensor or the controller;
A reset unit for initializing the fire detection sensor and the controller by the detection signal of the error detection unit; And
Reactivation detecting unit for detecting the fire detection sensor and the controller by the reset of the reset unit, and transmits a warning signal to the battery management unit of the vehicle if it is detected that the non-operation further; Battery protection device for an electric vehicle . The method of claim 1,
A sensor member provided at one side of the battery case to sense at least one of humidity, water level, or temperature of fresh water stored in the battery case;
A switch that opens a portion of the battery case to exhaust air in the battery case to the outside or to drain fresh water collected in the battery case to the outside; And
And a controller for controlling the operation of the switch by the detection signal of the sensor member. The method of claim 12, wherein the sensor member,
A water level sensor detecting a level of fresh water collected in the battery case;
A humidity sensor for sensing humidity of the battery case;
A humidity sensor for sensing humidity of the battery case; And
A temperature sensor measuring a temperature of the battery case; Battery protection device for an electric vehicle, characterized in that at least one of. The method of claim 12, wherein the switchgear,
A valve member for opening and closing a drain drain formed at the bottom of the battery case; And
And a solenoid valve provided with a rod to which the valve member is connected, opening and closing the drainage drainage by moving the valve member by a stretched rod, and controlled by the controller.

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