CN216958190U - Power battery safety device - Google Patents
Power battery safety device Download PDFInfo
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- CN216958190U CN216958190U CN202121298673.1U CN202121298673U CN216958190U CN 216958190 U CN216958190 U CN 216958190U CN 202121298673 U CN202121298673 U CN 202121298673U CN 216958190 U CN216958190 U CN 216958190U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The utility model provides a power battery safety protection device, and relates to the technical field of power battery safety protection. The power battery safety protection device of the utility model comprises: the bottom of the shell is provided with a reservoir, cooling water is arranged in the reservoir, and the power battery is positioned in the shell; the safety protection system comprises: the lifting device is arranged in the shell and used for bearing the power battery and driving the power battery to ascend and descend, and when the power battery is out of control due to heat and generates smoke or spontaneous combustion due to internal short circuit, the lifting device moves the power battery to the reservoir from the upper part of the reservoir and enables the power battery to be completely immersed in the cooling water; the fire extinguishing device is arranged at the shell, and is started when the power battery is spontaneously combusted, and the lifting device cannot operate or the power battery is immersed in cooling water by the lifting device, so that fire is extinguished. The safety protection device has double protection functions, and further improves safety.
Description
Technical Field
The utility model relates to the technical field of power battery safety protection, in particular to a power battery safety protection device.
Background
With the rapid development of new energy automobile industry, electric automobiles are more and more popular, and the electric automobiles need to be supplemented with electric energy for continuous running. The traditional charging mode needs to be charged for a long time in a parking state, and the battery replacement mode can perfectly solve the problem.
In recent two years, the battery replacement mode has started to be industrialized on a large scale, and when the battery is charged in the battery replacement mode, the battery is not loaded on a vehicle but is completed on a charging rack. In the process of charging the battery, risks of internal short circuit, combustion and even explosion exist, so that the safety risk of the power conversion station is extremely high, and in the process of charging and storing the power battery, it is necessary to fully evaluate the safety risk and make safe and effective countermeasures. In the prior art, the power battery is only protected against cooling and fire extinguishing when the power battery is subjected to thermal runaway and smoking or spontaneous combustion caused by internal short circuit, if the fire extinguishing mode fails, no other method is used for further fire extinguishing, the whole system needs to be observed on site and operated manually, and certain potential safety hazards exist for operators.
SUMMERY OF THE UTILITY MODEL
An object of the first aspect of the present invention is to provide a power battery safety protection device, which solves the problem of single fire extinguishing mode of the power battery safety protection device in the prior art.
Another object of the first aspect of the utility model is to solve the problem of the prior art that poses a danger to the operator.
In particular, the present invention provides a power battery safety protection device comprising:
the bottom of the shell is provided with a reservoir, cooling water is arranged in the reservoir, and the power battery is positioned in the shell; and
a safety protection system located at the housing, the safety protection system comprising:
the lifting device is arranged in the shell and used for bearing the power battery and driving the power battery to ascend and descend, and when the power battery is subjected to thermal runaway and smoke or spontaneous combustion caused by internal short circuit, the lifting device moves the power battery to the reservoir from the upper part of the reservoir and enables the power battery to be completely immersed in the cooling water;
and the fire extinguishing device is arranged at the shell, and is started when the power battery generates thermal runaway and internal short circuit to cause smoke or spontaneous combustion, and the lifting device cannot run or the power battery is immersed in the cooling water by the lifting device, so that fire is extinguished.
Optionally, the fire extinguishing apparatus includes a heptafluoropropane auxiliary fire extinguisher and a nozzle arranged inside the housing, the heptafluoropropane auxiliary fire extinguisher is connected with the nozzle through a pipeline, a switch is arranged at the pipeline, when thermal runaway and internal short circuit of the power battery cause smoke or spontaneous combustion, and the lifting device cannot operate or the lifting device immerses the power battery in cooling water, and the fire is still uncontrollable, the switch is turned on, and the heptafluoropropane auxiliary fire extinguisher sprays heptafluoropropane to the power battery through the nozzle.
Optionally, the lifting device comprises:
the lifting platform is arranged inside the shell and used for bearing the power battery;
the power source is used for providing power for driving the lifting platform; and
and the worm gear and worm device is connected with the power source and the lifting platform and drives the lifting platform to ascend or descend under the driving of the power source.
Optionally, the lifting device further comprises a stroke control assembly arranged inside the housing, the stroke control assembly comprises a stroke switch trigger rod, an upper limit stroke switch and a lower limit stroke switch, and the stroke control assembly is used for limiting the up-and-down stroke of the lifting platform and avoiding exceeding a set stroke.
Optionally, the safety protection system still includes cooling fire-retardant device, cooling fire-retardant device is located casing department start when the inside temperature of casing is higher than preset temperature to reduce temperature in the casing, and in the casing power battery closes when burning in order to block the air admission the casing reaches fire-retardant purpose.
Optionally, the temperature sensor is arranged at the top of the inside of the shell and used for detecting the temperature inside the shell and transmitting the detected temperature information to the control device;
the cooling flame retardant device is including setting up shutter and the fan of the relative both sides face of casing, the shutter with the fan all with controlling means connects the inside temperature of casing is higher than when predetermineeing the temperature, controlling means control the shutter is opened simultaneous control the fan is opened, reduces the inside temperature of casing works as the inside temperature of casing is less than predetermine the temperature or works as power battery takes place thermal runaway, when inside short circuit arouses smoking or spontaneous combustion, controlling means control the fan with the shutter all closes.
Optionally, the method further comprises:
the remote control device is in communication connection with the control device and is used for remotely controlling the control device to control the action of the safety protection system through the remote control device;
the remote emergency stop device is connected with the control device and is used for enabling the lifting platform to descend, the shutter and the fan to be closed and/or the switch of the fire extinguishing device to be opened when the remote emergency stop device is pressed.
Optionally, the method further comprises the step of,
the audible and visual alarm is connected with the temperature sensor, and starts to give an alarm when the temperature sensor detects that the temperature in the shell exceeds the preset temperature; and
and the smoke alarm is arranged at the shell and used for detecting the smoke concentration inside the shell and giving an alarm when the smoke concentration exceeds the preset concentration.
Optionally, the method further comprises:
the monitoring system is arranged at the top of the interior of the shell and used for monitoring and recording the interior condition of the shell in real time; and
the monitoring host is connected with the monitoring system and the control device by a CAN communication line and is used for displaying the picture shot by the monitoring system;
and the CAN communication line is also provided with a CAN repeater.
Optionally, the control device includes a main power switch, a lifting control module, a smoke alarm control module, a motor forward/reverse rotation ac contactor, a motor overcurrent protection relay, a monitoring system power supply, a manual emergency stop control button, and a manual lifting control button.
The safety protection device comprises a lifting device and a fire extinguishing device, when the power battery is out of control due to heat and smoke or spontaneous combustion caused by internal short circuit, the power battery can be immersed in cooling water by the lifting device to cool or extinguish fire, and when the lifting device fails or the fire is too large, the fire extinguishing device can be used for extinguishing fire.
The cooling flame-retardant device can ensure that the power battery is in a lower temperature state as far as possible in the using process of the power battery, and reduces the probability of thermal runaway, spontaneous combustion and even explosion of the power battery. When the power battery is already out of control thermally, and the internal short circuit causes smoke or spontaneous combustion, the power battery can be closed to prevent air from entering the shell, so that the flame can be slowly extinguished because of the absence of air.
Through the design of the remote control device and the remote emergency stop device, a user can control the device remotely, and the power battery does not need to be operated on site by a worker when the power battery is in a fire, so that the worker is prevented from being injured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a power cell safety shield in accordance with one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a power battery safety protection device according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a process control module according to one embodiment of the utility model;
FIG. 4 is a schematic structural diagram of a power battery safety protection device according to another embodiment of the utility model;
FIG. 5 is a schematic block diagram of a control device according to one embodiment of the present invention;
figure 6 is a control circuit diagram of a three-phase asynchronous motor according to one embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a power battery safety device 100 according to an embodiment of the present invention. The power battery safety protection device 100 may be disposed at a power change station. Specifically, power battery safety shield 100 may include a housing 10 and a safety shield system 20. In this embodiment, the housing 10 may be a rectangular parallelepiped, and may be designed according to the actual design. A reservoir 11 may be provided at a bottom position of the housing 10, and cooling water may be provided inside the reservoir 11. And an inlet pipe 12 and an outlet pipe 13 may be designed at the housing 10 for respectively feeding and discharging water into and from the reservoir 11. And valves (not shown) are arranged at the water inlet pipe 12 and the water outlet pipe 13. In normal use, the power cell is located inside the housing 10 and above the level of the cooling water. A certain amount of water is required in the reservoir 11, which is sufficient for the power cell to be located above the level of the cooling water when the power cell is normally placed, and the cooling water in the reservoir 11 can completely submerge the power cell when the power cell is lowered into the reservoir 11.
As a specific embodiment of the present embodiment, the safety protection system 20 of the present embodiment is located at the housing 10, and specifically, the safety protection system 20 may include a lifting device 21 and a fire extinguishing device 22. Wherein, elevating gear 21 sets up in the inside department of casing 10 for bear power battery, and drive power battery and rise and descend, when power battery because of inside circuit break or the temperature is too high etc. causes thermal runaway, internal short circuit and arouses smoking or spontaneous combustion, elevating gear 21 moves power battery to cistern 11 department from the top of cistern 11, and makes power battery submergence in the cooling water completely cool down or put out a fire. In addition, the fire extinguishing device 22 of the present embodiment is disposed at the top end inside the housing 10, and is activated to extinguish a fire when thermal runaway of the power battery occurs, internal short circuit causes smoke or spontaneous combustion, and the elevating device 21 cannot operate or the power battery is immersed in cooling water by the elevating device 21 and the fire is still uncontrollable.
Safety arrangement in this embodiment includes elevating gear 21 and extinguishing device 22, can utilize elevating gear 21 to lower the temperature or put out a fire with power battery submergence in the cooling water earlier when power battery thermal runaway, inside short circuit arouse smoke or spontaneous combustion phenomenon appear, and when elevating gear 21 became invalid or the intensity of a fire was too big, can also utilize extinguishing device 22 to put out a fire, and the safety arrangement of this embodiment possesses duplicate protection function, further improves the security.
FIG. 2 is a schematic structural diagram of a power battery safety protection device according to an embodiment of the utility model; as a specific embodiment of the present invention, as shown in fig. 2, in this embodiment, the fire extinguishing apparatus 22 may include a heptafluoropropane auxiliary fire extinguisher 221, a spray nozzle 222 is disposed inside the housing 10, the heptafluoropropane auxiliary fire extinguisher 221 is connected to the spray nozzle 222 through a pipe 223, a switch 224 is disposed at the pipe 223, when thermal runaway and internal short circuit of the power battery cause smoke or spontaneous combustion, and the lifting apparatus 21 cannot operate or the power battery is immersed in cooling water by the lifting apparatus 21 and the fire is still uncontrollable, the switch 224 is turned on, and the heptafluoropropane auxiliary fire extinguisher 221 sprays heptafluoropropane to the power battery through the spray nozzle 222.
In this embodiment, the switch 224 may be a manual switch 224 or an electronic switch 224, the manual switch 224 may be manually turned on by a worker, and the electronic switch 224 may be directly controlled by the controller. Whether the switch 224 is a manual switch 224 or an electronic switch 224, when the switch 224 is turned on, the heptafluoropropane in the heptafluoropropane auxiliary fire extinguisher 221 is sprayed along the pipe 223 toward the inside of the housing 10 at the spray head 222. The location and number of spray heads 222 may be designed according to actual needs. In this embodiment, two spray heads 222 are provided and arranged side by side at the top end of the interior of the housing 10.
As a specific embodiment of the present invention, in this embodiment, the lifting device 21 may include a lifting table 211, a power source 212, and a worm gear 213. Specifically, the lifting table 211 is provided inside the housing 10 for carrying the power battery. The power source 212 is used for providing power for driving the lifting table 211. The worm gear 213 is connected to the power source 212 and the lift table 211, and drives the lift table 211 to move up and down by the power source 212. In this embodiment, power source 212 may be a three-phase asynchronous motor. When the lifting platform 211 needs to be driven to ascend or descend, the worm gear and worm device 213 can be driven to rotate by turning on or off the three-phase asynchronous motor, so that the lifting platform 211 is driven to ascend or descend. The structure that the motor drives the worm gear 213 to rotate and further drives the lifting platform 211 to ascend or descend is simple.
FIG. 3 is a schematic diagram of a configuration of a stroke control module according to one embodiment of the present invention; as a specific embodiment of the present invention, as shown in fig. 3, the lifting device 21 of the present embodiment may further include a stroke control component 214, where the stroke control component 214 includes a stroke switch trigger rod 215, an upper limit stroke switch 216, and a lower limit stroke switch 217, and the stroke control component 214 is configured to limit the up-and-down stroke of the lifting platform 211 to avoid exceeding a set stroke.
In the descending process of the specific power battery, the three-phase asynchronous motor is reversed through the positive and negative rotation alternating current contactor of the three-phase asynchronous motor, the rotating motion of the motor is converted into the linear ascending motion of the worm through the worm gear and worm device 213, the lifting platform 211 and the travel switch trigger rod 215 in the travel control assembly 214 are driven to ascend until the upper limit travel switch 216 is triggered to be closed, the three-phase asynchronous motor stops working, and the lifting platform stops ascending. The descending process is exactly the reverse of the ascending process.
As a specific embodiment of the present invention, as shown in fig. 1, the safety protection system 20 of the present embodiment may further include a temperature-reducing and flame-retarding device 23, where the temperature-reducing and flame-retarding device 23 is located at the housing 10, is activated when the temperature inside the housing 10 is higher than a preset temperature, so as to reduce the temperature inside the housing 10, and is closed when the power battery inside the housing 10 burns, so as to block air from entering the housing 10, so as to achieve the purpose of flame retarding.
The cooling and flame-retardant device 23 can ensure that the power battery is in a lower temperature state as much as possible in the use process of the power battery, and reduce the probability of the situation that the power battery is out of control due to high temperature and smokes or spontaneously burns or even explodes due to internal short circuit. When the power battery is already out of thermal control, and the internal short circuit causes smoke or spontaneous combustion, the power battery can be closed to prevent air from entering the shell 10, so that the flame can be slowly extinguished due to the absence of air.
The power battery safety guard 100 of the present embodiment may further include a temperature sensor 30 and a control device 40, wherein the temperature sensor 30 is disposed at the top of the interior of the housing 10 and is used for detecting the temperature of the interior of the housing 10 and transmitting the detected temperature information to the control device 40.
The cooling and flame retarding device 23 comprises a louver 231 and a fan 232 which are arranged on two opposite side surfaces of the casing 10, both the louver 231 and the fan 232 are connected with the control device 40, when the temperature inside the casing 10 is higher than a preset temperature, the control device 40 controls the louver 231 to be opened and controls the fan 232 to be opened at the same time, so as to reduce the temperature inside the casing 10, and when the temperature inside the casing 10 is lower than the preset temperature or when the power battery is out of control due to thermal runaway and internal short circuit cause smoke or spontaneous combustion, the control device 40 controls both the fan 232 and the louver 231 to be closed. The shutters 231 and 232 in this embodiment are both electric mechanisms, that is, the electronic fans 232 and the electronic shutters 231, and can be directly controlled by the control device 40.
In the above embodiment, the safety protection system 20 in the power battery safety protection device 100 includes the lifting device 21, the fire extinguishing device 22 and the cooling and fire retarding device 23, and emergency treatment is performed on the power battery in a short time before and after thermal runaway caused by thermal runaway and internal short circuit, smoke caused by internal short circuit or spontaneous combustion, so as to reduce the probability of smoke or spontaneous combustion caused by thermal runaway and internal short circuit of the power battery as much as possible, or control the fire or extinguish the fire after smoke or spontaneous combustion caused by thermal runaway and internal short circuit of the power battery as much as possible, thereby avoiding further less causing greater economic loss or reducing casualties of people.
The power battery safety protection device 100 of the present embodiment may further include a remote control device 50 and a remote emergency stop device 60, wherein the remote control device 50 is communicatively connected to the control device 40 for remotely controlling the control device 40 to control the operation of the safety protection system 20 through the remote control device 50. The remote emergency stop device 60 is connected with the control device 40, and is used for lowering the lifting platform 211, closing the shutter 231 and the fan 232 and/or opening the switch of the fire extinguishing device 22 when the remote emergency stop device 60 is pressed.
Specifically, an antenna 104 is provided outside the housing 10, and the control device 40 is communicatively connected to the remote control device 50 and the remote emergency stop device 60 by using the antenna 104.
In this embodiment, through the design of remote control device 50 and long-range scram device 60, can let the user through remote control the device, need not staff's field operation when power battery appears the intensity of a fire, avoid causing the injury to the staff.
A remote air switch 105 is arranged between the remote control device 50 and the remote emergency stop device 60 and the control device 40 for controlling the on-off of the remote control device 50 and the remote emergency stop device 60 and the control device 40.
The power battery safety protection device 100 of the present embodiment may further include an audible and visual alarm 70, a smoke alarm 80, a monitoring system 90, and a monitoring host 101. The audible and visual alarm 70 is connected to the temperature sensor 30, and starts to give an alarm when the temperature sensor 30 detects that the temperature inside the casing 10 exceeds a preset temperature. The audible and visual alarm 70 in the present embodiment is provided outside the housing 10 or at a remote operation room location. When the temperature exceeds the preset value, the audible and visual alarm 70 emits light and gives an alarm sound, and a worker can timely make a response after hearing or seeing the alarm given by the audible and visual alarm 70, so that the spontaneous combustion of the battery is avoided.
The smoke alarm 80 of the present embodiment is provided at the housing 10 for detecting the smoke density inside the housing 10 and giving an alarm when the smoke density exceeds a preset density. The smoke alarm 80 of this embodiment employs a photoelectric smoke alarm switch, which includes a light emitting element and a photosensitive receiving element. When the power battery is in thermal failure to generate a large amount of smoke, the smoke passes through the space between the light-emitting element and the photosensitive receiving element, the light intensity changes, the photosensitive receiving element triggers the smoke alarm 80 to act after detecting, the information is transmitted to the control device 40, and the control device 40 controls the safety protection system 20 to act according to the situation
In addition, the monitoring system 90 is disposed on the top of the inside of the housing 10 in this embodiment, and is used for monitoring and recording the inside condition of the housing 10 in real time. The monitoring host 101 is connected to the monitoring system 90 by a CAN communication line, and is configured to display a picture taken by the monitoring system 90.
In this embodiment, the CAN communication line is further provided with a CAN relay 102, the CAN relay 102 CAN increase the load capacity of the CAN communication line and prolong the communication distance to match with the CAN networks with different communication baud rates, and simultaneously supports the conversion between the high-speed CAN and the fault-tolerant CAN network, when the CAN communication line is actually used, because the inside of the shell 10 has almost no light or the light is dark, the illuminating lamp 103 CAN be arranged inside the shell for internal illumination, thereby facilitating the observation of the inside condition of the shell 10.
FIG. 5 is a schematic block diagram of a control device according to one embodiment of the present invention; as shown in fig. 5, the control device 40 includes a main power switch 41, a lift control module 42, a smoke alarm control module 43, a motor forward/reverse rotation ac contactor 44, a motor overcurrent protection relay 45, a monitoring system power supply 46, a manual emergency stop control button 47, and a manual lift control button 48.
The control device 40 of the power battery safety protection device 100 of the embodiment comprises the structure, the whole safety protection system 20 can be operated by manually pressing the button of the control device 40, remote control can also be adopted to control the safety protection system 20, once an emergency occurs, the remote control platform can be lifted by using a remote controller, the field operation of personnel is not needed, and the secondary injury of the personnel can be avoided. Or under the condition that the remote control system fails, the fire can be spread as much as possible by performing field control, and unnecessary loss is caused.
The working principle of the power battery safety protection device 100 of the present embodiment is as follows:
before the device is not filled with water, the lifting function of the lifting table 211 is tested through a manual lifting control button on the remote control device 50 or the control device 40, and the worm and gear device 213 is ensured to work normally.
The lifting platform 211 is moved to a suitable position to ensure that the valve at the outlet pipe at the bottom of the reservoir 11 is in a cut-off state.
The cooling water is injected into the reservoir 11 in the housing 10 through the water inlet pipe, the highest liquid level of the cooling water should be at least 200mm lower than the lower plane of the lifting platform 211, so that the power battery can be completely submerged by the cooling water after being lowered to the bottom of the reservoir 11, and the distance between the upper plane of the power battery and the liquid level of the reservoir 11 is at least 100 mm.
The power battery is placed on the lifting table 211 and is locked and fixed with the lifting table 211 through the tool. According to actual needs, a high-voltage cable and a low-voltage wire harness between the power battery and the control room are prolonged, the CAN repeater 102 is installed in the middle position between the power battery and the control room, and a CAN communication line between the power battery and the control room passes through the CAN repeater 102, so that the communication distance is prolonged, and good communication quality is ensured.
In the charging or storage process of the power battery, once the phenomena of rapid temperature rise, smoke generation, fire burning and the like are caused due to the internal damage of the power battery, the power battery protection device performs the following actions:
1) the power battery internal temperature sensor 30 monitors the internal temperature abnormal change, and when the temperature value exceeds a set alarm threshold value, the audible and visual alarm 70 is triggered to prompt the operator of abnormal temperature; when the temperature value exceeds a set shutdown threshold value, the battery state monitoring host 101 in the control room automatically controls the disconnection of the remote air switch, and a high-voltage direct-current bus between the power battery and the charger is cut off.
2) An operator can observe whether the power battery generates smoke, burns on fire and the like through the monitoring system 90, once the phenomena occur, the operator sends a descending instruction through the remote control device 50, the distance is more than ten meters, the control device 40 receives an antenna receiving signal and transmits the signal to the lifting control module in the control device 40, the lifting platform 211 is controlled to descend to drive the travel switch trigger rod 215 in the travel control assembly 214 to descend until the lower limiting travel switch 217 is triggered to be closed, the lifting platform 211 stops, the power battery is ensured to be completely covered by cooling water to be rapidly cooled, and more serious accidents such as severe combustion, explosion and the like are avoided to the maximum extent. As shown in fig. 5, the power cell drops below the liquid level.
If under the unattended state, the power battery is out of control due to heat, and the internal short circuit causes smoke or spontaneous combustion, once the smoke generated by combustion reaches a certain concentration, the smoke alarm switch is triggered to work, the switching value signal is transmitted to the lifting control module in the control device 40 through a hard wire, the control device 40 controls the lifting platform 211 to descend, and the power battery is placed in cooling water to be cooled.
If the remote control function is disabled, the lifting table 211 can be manually controlled to be lowered by manually pressing a "down" button of a manual lifting control button on the control device 40.
The lifting control module in the control device 40 is triggered to work through remote control of a remote controller or manual control of a lifting button on the control device 40, the reversing of the three-phase asynchronous motor is realized through a motor forward-reverse rotating alternating current contactor, the rotating motion of the motor is converted into linear lifting motion of a worm through a worm gear and worm reducer, a travel switch trigger rod 215 in the lifting platform and the travel control assembly 214 is driven to ascend until an upper limit travel switch 216 is triggered to be closed, the three-phase asynchronous motor stops working, and the lifting platform 211 stops ascending.
Figure 6 is a control circuit diagram of a three-phase asynchronous motor according to one embodiment of the present invention. The control principle of the three-phase asynchronous motor is as follows:
specifically, the forward rotation switch controls the attraction of an alternating current contactor KM1, the phase sequence of alternating current output by KM1 is U, V, W, and the motor operates in forward rotation.
The reverse switch controls the AC contactor KM2 to pull in, the phase sequence of the AC output by KM2 is W, V, U, and the motor runs in a reverse direction.
The stop switch gives a stop signal to stop the motor from rotating in either forward or reverse direction. The KM1 and the KM2 realize self-locking and interlocking functions, and guarantee that the KM1 and the KM2 cannot be attracted at the same time.
Further, the control description of the remote control device 50:
1) the power supply of the control device 40 is alternating current 220V, and manual inching control, remote control and intelligent smoke control are supported.
2) The control device 40 can realize self-locking and interlocking control in the positive and negative rotation process of the motor.
3) The control device 40 includes a travel switch circuit interface and a smoke alarm 80 switch circuit interface.
Under normal conditions, the temperature sensor 30 detects the temperature in the power battery safety protection device 100 in real time, and transmits a temperature signal to the control device 40 and the monitoring host 101, so that an operator can monitor the ambient temperature in the housing 10 in real time, and control the fan 232 and the louver 231 through a temperature limit value. When the ambient temperature is higher than the high-temperature set value, the control device 40 controls the power switches of the fan 232 and the shutter 231 to be closed, the cooling fan 232 is powered on to operate, the shutter 231 is opened, air in the bin is enabled to circulate with the outside, and heat accumulation in the bin is reduced. When the ambient temperature is lower than the low temperature setting value, controller 40 controls the power switch to turn off fan 232 and louver 231, stops the operation of cooling fan 232, and closes louver 231. The whole working process can ensure that the ambient temperature in the device is kept within a certain range, and the automatic adjustment of the ambient temperature is realized.
In addition, if thermal runaway, internal short circuit, smoke generation or spontaneous combustion of the battery have occurred, the fan 232 and the shutters 231 may be controlled to be closed to reduce air from entering the inside of the case 10, thereby reducing further spread of the fire.
In addition, after the power battery is subjected to an accident to cause self smoking or burning and firing, if the lifting platform 211 cannot work normally due to the accident, the power battery cannot sink into the reservoir 11, or if the fire is still unable to be effectively controlled, the heptafluoropropane auxiliary fire extinguishing device 22 can be triggered manually as required to control the heptafluoropropane to be sprayed into the power battery protection device to control the fire, so that serious accidents are avoided. After the power battery monitoring host 101 sends out a control signal, the solenoid valve is opened, and heptafluoropropane is sprayed into the power battery safety protection device 100.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the utility model may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the utility model. Accordingly, the scope of the utility model should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A power battery safety protection device, comprising:
the bottom of the shell is provided with a reservoir, cooling water is arranged in the reservoir, and the power battery is positioned in the shell; and
a safety protection system located at the housing, the safety protection system comprising:
the lifting device is arranged in the shell and used for bearing the power battery and driving the power battery to ascend and descend, and when the power battery is subjected to thermal runaway and smoke or spontaneous combustion caused by internal short circuit, the lifting device moves the power battery to the reservoir from the upper part of the reservoir and enables the power battery to be completely immersed in the cooling water; and
and the fire extinguishing device is arranged at the shell, and is started when the power battery generates thermal runaway and internal short circuit to cause smoke or spontaneous combustion, and the lifting device cannot run or the power battery is immersed in the cooling water by the lifting device, so that fire is extinguished.
2. The power battery safety guard of claim 1,
the fire extinguishing device comprises a heptafluoropropane auxiliary fire extinguisher and a spray nozzle arranged in the shell, the heptafluoropropane auxiliary fire extinguisher is connected with the spray nozzle through a pipeline, a switch is arranged at the pipeline, when the power battery is out of control due to thermal runaway and internal short circuit and smoke or spontaneous combustion is caused, the lifting device cannot operate or the power battery is immersed in cooling water by the lifting device, and the fire is still uncontrollable, the switch is turned on, and the heptafluoropropane auxiliary fire extinguisher sprays heptafluoropropane to the power battery through the spray nozzle.
3. The power battery safety guard of claim 2,
the lifting device comprises:
the lifting platform is arranged inside the shell and used for bearing the power battery;
the power source is used for providing power for driving the lifting platform; and
and the worm gear and worm device is connected with the power source and the lifting platform and drives the lifting platform to ascend or descend under the driving of the power source.
4. The power battery safety guard of claim 3,
the lifting device further comprises a stroke control assembly arranged inside the shell, the stroke control assembly comprises a stroke switch trigger rod, an upper limit stroke switch and a lower limit stroke switch, and the stroke control assembly is used for limiting the vertical stroke of the lifting platform and avoiding exceeding a set stroke.
5. The power battery safety guard of claim 3,
the safety protection system further comprises a cooling flame-retardant device, wherein the cooling flame-retardant device is located at the shell, the temperature inside the shell is started when being higher than a preset temperature, so that the temperature in the shell is reduced, and the power battery in the shell is closed to block air from entering the shell during combustion, so that the flame-retardant purpose is achieved.
6. The power battery safety guard of claim 5,
the temperature sensor is arranged at the top of the inside of the shell and used for detecting the temperature inside the shell and transmitting the detected temperature information to the control device;
the cooling flame retardant device comprises a shutter and a fan, wherein the shutter and the fan are arranged on two opposite side faces of the shell, the shutter and the fan are connected with the control device, the temperature inside the shell is higher than or equal to the preset temperature, the control device controls the shutter to be opened and simultaneously controls the fan to be opened and reduce the temperature inside the shell, and when the temperature inside the shell is lower than the preset temperature or when the power battery is out of control due to thermal runaway and internal short circuit to cause smoke generation or spontaneous combustion, the control device controls the fan and the shutter to be closed.
7. The power battery safety guard of claim 6,
further comprising:
the remote control device is in communication connection with the control device and is used for remotely controlling the control device to control the action of the safety protection system through the remote control device;
the remote emergency stop device is connected with the control device and is used for enabling the lifting platform to descend, the shutter and the fan to be closed and/or the switch of the fire extinguishing device to be opened when the remote emergency stop device is pressed.
8. The power battery safety guard of claim 6,
also comprises the following steps of (1) preparing,
the audible and visual alarm is connected with the temperature sensor, and starts to give an alarm when the temperature sensor detects that the temperature in the shell exceeds the preset temperature; and
and the smoke alarm is arranged at the shell and used for detecting the smoke concentration inside the shell and giving an alarm when the smoke concentration exceeds the preset concentration.
9. The power battery safety guard of any of claims 6-8,
further comprising:
the monitoring system is arranged at the top of the interior of the shell and used for monitoring and recording the interior condition of the shell in real time; and
the monitoring host is connected with the monitoring system and the control device by a CAN communication line and is used for displaying the picture shot by the monitoring system;
and the CAN communication line is also provided with a CAN repeater.
10. The power battery safety guard of any of claims 6-8,
the control device comprises a main power switch, a lifting control module, a smoke alarm control module, a motor forward and reverse rotation alternating current contactor, a motor overcurrent protection relay, a monitoring system power supply, a manual emergency stop control button and a manual lifting control button.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121298673.1U CN216958190U (en) | 2021-06-10 | 2021-06-10 | Power battery safety device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121298673.1U CN216958190U (en) | 2021-06-10 | 2021-06-10 | Power battery safety device |
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| CN216958190U true CN216958190U (en) | 2022-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372015A (en) * | 2022-07-18 | 2022-11-22 | 北京国家新能源汽车技术创新中心有限公司 | High low temperature environment cabin motor rack experimental system |
| CN117254152A (en) * | 2023-08-15 | 2023-12-19 | 江苏果下科技有限公司 | Temperature-control type new energy battery box |
-
2021
- 2021-06-10 CN CN202121298673.1U patent/CN216958190U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372015A (en) * | 2022-07-18 | 2022-11-22 | 北京国家新能源汽车技术创新中心有限公司 | High low temperature environment cabin motor rack experimental system |
| CN117254152A (en) * | 2023-08-15 | 2023-12-19 | 江苏果下科技有限公司 | Temperature-control type new energy battery box |
| CN117254152B (en) * | 2023-08-15 | 2024-05-14 | 江苏果下科技有限公司 | Temperature-control type new energy battery box |
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Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: Zhejiang Geely Remote New Energy Commercial Vehicle Group Co.,Ltd. Patentee after: Zhejiang Geely new energy Commercial Vehicle Development Co.,Ltd. Patentee after: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee before: ZHEJIANG GEELY NEW ENERGY COMMERCIAL VEHICLE GROUP Co.,Ltd. Patentee before: Zhejiang Geely new energy Commercial Vehicle Development Co.,Ltd. Patentee before: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. |
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Effective date of registration: 20230802 Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: Zhejiang Geely Remote New Energy Commercial Vehicle Group Co.,Ltd. Patentee after: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee before: Zhejiang Geely Remote New Energy Commercial Vehicle Group Co.,Ltd. Patentee before: Zhejiang Geely new energy Commercial Vehicle Development Co.,Ltd. Patentee before: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. |