CN113131040A - Lithium ion battery parking protection device and method for operation machine and operation machine - Google Patents
Lithium ion battery parking protection device and method for operation machine and operation machine Download PDFInfo
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- CN113131040A CN113131040A CN202110524556.0A CN202110524556A CN113131040A CN 113131040 A CN113131040 A CN 113131040A CN 202110524556 A CN202110524556 A CN 202110524556A CN 113131040 A CN113131040 A CN 113131040A
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010248 power generation Methods 0.000 claims abstract description 86
- 238000004146 energy storage Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a lithium ion battery parking protection device and method for an operating machine and the operating machine, wherein the lithium ion battery parking protection device for the operating machine comprises a power generation device and a fan; the power generation device comprises an sunny surface, a shading area is formed on one side of the sunny surface, which is far away from the power generation device, the lithium ion battery is arranged in the shading area, and the shading area is used for shading the lithium ion battery; the fan is electrically connected with the power generation device, and the air outlet side of the fan faces the lithium ion battery. The invention can not only shade the lithium ion battery by the power generation device, but also supply power to the fan by the power generation device to drive the fan to rotate and accelerate the air flow on the surface of the lithium ion battery, thereby creating a suitable storage environment for the lithium ion battery and ensuring the service life and the storage safety of the lithium ion battery.
Description
Technical Field
The invention relates to the technical field of operation machinery, in particular to a lithium ion battery parking protection device and method of operation machinery and the operation machinery.
Background
The lithium ion battery is widely applied to the working machines such as excavators, cranes, fire trucks and the like as a power battery so as to be suitable for the electric development of the working machines. The lithium ion battery is suitable for being stored at the room temperature of 25-47 ℃, and when the lithium ion battery is stored in a high-temperature environment of more than 70 ℃, the service life of the lithium ion battery is seriously shortened, and even the risk of spontaneous combustion exists.
However, in practical applications, the lithium ion battery is directly mounted in a box body at the rear side of the cab of the working machine, so that only one layer of steel plate is arranged at the upper side of the lithium ion battery for shading. And the work scene of operation machinery is comparatively abominable, can park in the building site temporarily usually midway in the operation, and does not have safeguard measure such as awning, causes lithium ion battery to expose under the sunlight indirectly, and in hot summer, lithium ion battery's temperature can surpass suitable temperature of depositing far away, and lithium ion battery's life-span receives serious influence to there is great potential safety hazard.
Disclosure of Invention
The invention provides a lithium ion battery parking protection device and method for an operating machine and the operating machine, which are used for solving the problem that the lithium ion battery on the operating machine cannot be guaranteed to achieve a proper storage environment at present.
The invention provides a lithium ion battery parking protection device of an operation machine, which comprises: a power generation device and a fan; the power generation device comprises an sunny surface, a shading area is formed on one side of the sunny surface, which is far away from the power generation device, the lithium ion battery is arranged in the shading area, and the shading area is used for shading the lithium ion battery; the fan is electrically connected with the power generation device, and the air outlet side of the fan faces the lithium ion battery.
According to the lithium ion battery of a kind of working machinery that the invention provides parks the protective device, also include: a temperature sensor and a fan controller; the temperature sensor is used for detecting the surface temperature of the lithium ion battery, the temperature sensor is in communication connection with the fan controller, the fan controller is electrically connected with the power generation device, and the fan controller is in communication connection with the fan.
According to the lithium ion battery parking protection device of the operation machine, a power system of the operation machine is in communication connection with the fan controller, the fan controller is in communication connection with the whole machine controller on the operation machine, and the whole machine controller is in communication connection with the fan.
According to the lithium ion battery parking protection device of the working machine, the power generation device is electrically connected with the electric energy storage device on the working machine, and/or the fan is electrically connected with the electric energy storage device.
According to the lithium ion battery parking protection device of the working machine, the power generation device is provided with a power generation unit and a voltage conversion unit; the power generation unit is electrically connected with the voltage conversion unit; the voltage conversion unit is used for being electrically connected with the electric energy storage device and the fan respectively.
According to the lithium ion battery parking protection device of the working machine, the power generation unit comprises a solar cell panel or a thermoelectric cell panel.
According to the lithium ion battery parking protection device of the working machine, the power generation unit is in a plate shape or a cover shape; the power generation unit is arranged on the upper sides of the lithium ion battery and the fan under the condition that the power generation unit is in a plate shape; and under the condition that the power generation unit is in a cover shape, the cover opening end of the power generation unit is used for being connected with the operation machine, and the lithium ion battery and the fan are arranged in the power generation unit.
The invention also provides a working machine, which comprises a cab and a frame; the lithium ion battery parking protection device of the operation machine is arranged on the frame and is positioned on the rear side of the cab.
The invention also provides a protection method of the lithium ion battery parking protection device of the operation machine, which comprises the following steps: s1, detecting the starting state of the working machine and the temperature of the lithium ion battery; and S2, when the operation machine is detected to be in a stop state, if the temperature of the lithium ion battery is higher than a preset value, the fan is started, and if the temperature of the lithium ion battery is lower than the preset value, the fan is closed or the fan is controlled to keep the stop state.
According to the protection method provided by the present invention, before S1, the method further includes: detecting the output current of the power generation device; in a case where the current output of the power generation device is detected, the detection operation of S1 is performed; s2 further includes: and when the operating machine is detected to be in the opening state, the complete machine controller on the operating machine controls the opening and closing state of the fan according to the temperature of the lithium ion battery.
According to the lithium ion battery parking protection device and method for the operation machine and the operation machine, the power generation device and the fan are arranged, so that the power generation device can shade the lithium ion battery to prevent the lithium ion battery from being overhigh in temperature caused by direct irradiation of sunlight, and the power generation device can supply power to the fan to drive the fan to rotate to accelerate the air flow on the surface of the lithium ion battery, so that a proper storage environment is created for the lithium ion battery, and the service life and the storage safety of the lithium ion battery are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a lithium ion battery parking guard provided in the present invention;
FIG. 2 is a schematic diagram of an installation structure of a lithium ion battery parking guard provided by the present disclosure on a work machine;
FIG. 3 is a block diagram of a control structure of a lithium ion battery parking protection device provided by the present invention;
FIG. 4 is a schematic flow chart illustrating a protection method for a lithium ion battery parking protection device based on a work machine according to the present disclosure;
FIG. 5 is a second schematic flowchart of a protection method for a lithium ion battery parking protection device based on a working machine according to the present invention;
reference numerals:
1: a power generation device; 2: a fan; 3: a lithium ion battery;
4: a temperature sensor; 5: a fan controller; 6: an electrical energy storage device;
7: a cab; 8: a vehicle frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes a lithium ion battery parking protection device, a lithium ion battery parking protection method and a working machine of the working machine according to the present invention with reference to fig. 1 to 5.
As shown in fig. 1 and fig. 2, the present embodiment provides a lithium ion battery parking protection device for a working machine, including: a power generation device 1 and a fan 2; the power generation device 1 is provided with an sunny surface, a light shielding area is formed on one side of the sunny surface, which is far away from the power generation device 1, the light shielding area is used for installing the lithium ion battery 3, and the light shielding area is used for shielding the lithium ion battery 3; the fan 2 is electrically connected with the power generation device 1, and the air outlet side of the fan 2 faces the lithium ion battery 3.
Specifically, this embodiment is through setting up power generation facility 1 and fan 2, both can carry out the sunshade by power generation facility 1 to lithium ion battery 3, prevent that the direct irradiation of sunshine from leading to lithium ion battery 3's high temperature, can be again by power generation facility 1 to fan 2 power supply in order to order about fan 2 to rotate to the air flow on 3 surfaces of lithium ion battery is accelerated, thereby creates suitable deposit the environment for lithium ion battery 3, has ensured lithium ion battery 3's life and has deposited safety.
It should be noted that the power generation device 1 shown in the present embodiment may adopt a solar power generation device, a thermoelectric power generation device, and a fuel power generation device, and is not particularly limited herein.
Meanwhile, a plurality of lithium ion batteries 3 may be provided, and the plurality of lithium ion batteries 3 may be connected in series and/or in parallel to provide a working power supply for the operation of the power system of the working machine.
As shown in fig. 3, in order to accurately monitor the temperature of the lithium ion battery 3, the present embodiment is further provided with a temperature sensor 4 and a fan controller 5; temperature sensor 4 is used for detecting lithium ion battery 3's surface temperature, and temperature sensor 4 is connected with fan controller 5 communication, fan controller 5 and power generation facility 1 electric connection, and fan controller 5 is connected with fan 2 communication.
Because the most suitable storage temperature of the lithium ion battery 3 is 25-47 ℃, the control program of the fan controller 5 shown in this embodiment can set the preset value for monitoring the temperature of the lithium ion battery 3 to be 45 ℃, and when the temperature sensor 4 detects that the temperature of the lithium ion battery 3 is higher than 45 ℃, the fan controller 5 controls the fan 2 to be started so as to ventilate and exchange heat for the lithium ion battery 3, so that the lithium ion battery 3 is in a suitable temperature environment. In the process, the power generation device 1 provides electric energy required by the operation of the fan controller 5 and the fan 2, so that the energy-saving effect can be achieved; meanwhile, the temperature of the lithium ion battery 3 is regulated and controlled based on the control of the fan controller 5 on the on-off state of the fan 2.
Wherein, the fan 2 that this embodiment shows can set up a plurality ofly, and a plurality of fans 2 are parallelly connected in parallel, and fan 2 is preferred axial fan.
Further, the power system of the working machine shown in the embodiment is in communication connection with the fan controller 5, the fan controller 5 is in communication connection with the overall machine controller on the working machine, and the overall machine controller is in communication connection with the fan 2.
Specifically, the present embodiment may determine the start-up state of the work machine by monitoring the rotation state of a power system of the work machine, where the present embodiment may specifically monitor the start-up state of the work machine through an encoder provided in the power system.
When the condition that the operation machine is stopped is detected, the condition that the operation machine is temporarily stopped on an operation site can be known, and at the moment, the fan controller 5 can control the opening and closing state of the fan 2 according to the temperature information detected by the temperature sensor 4.
Accordingly, when the working machine is detected to be in the on state, the temperature information detected by the temperature sensor 4 can be acquired by the whole machine controller on the working machine, and the on-off state of the fan 2 is controlled according to the temperature of the lithium ion battery 3. In the process, the electricity generated by the power generation device 1 can be supplied to a low-voltage system of the working machine, and the complete machine controller sends a control instruction to the fan 2 so as to realize temperature regulation and control of the lithium ion battery 3, and the fan controller 5 does not need to send the control instruction to the fan 2.
The fan controller 5 and the overall controller shown in this embodiment may be both a PLC controller or a single chip microcomputer known in the art, and are not specifically limited herein.
Further, the power generation device 1 shown in the present embodiment is electrically connected to the electric energy storage device 6 on the working machine, and/or the fan 2 is electrically connected to the electric energy storage device 6.
In this way, the electrical energy generated by the generator 1 is supplied to the fan 2 on the one hand and is transferred to the electrical energy storage device 6 on the other hand. Therefore, if the electric energy generated by the power generation device 1 exceeds the electric energy required by the fan 2, the excess electric energy can satisfy the charging storage of the electric energy storage device 6; if the electric energy generated by the power generation device 1 does not satisfy the electric energy required by the fan 2, the electric energy storage device 6 may supply power to the fan 2 together with the power generation device 1.
The electric energy storage device 6 shown in the present embodiment may be a battery pack known in the art, and the voltage of the battery pack may be 12V, 24V, 48V, 60V, and the like, which is not particularly limited.
Further, in order to satisfy the power supply operation of the electric energy storage device 6 or the fan 2 with different voltage loads, the power generation device 1 shown in the embodiment is specifically provided with a power generation unit and a voltage conversion unit; the power generation unit is electrically connected with the voltage conversion unit; the voltage conversion unit is used for being electrically connected with the electric energy storage device 6 and the fan 2 respectively.
Specifically, the power generation unit shown in this embodiment may adopt a solar panel or a thermoelectric panel. The solar cell panel is a device which directly or indirectly converts solar radiation energy into electric energy through a photoelectric effect or a photochemical effect by absorbing sunlight. The temperature difference battery board is a device which directly converts heat energy into electric energy by utilizing temperature difference.
Here, the power generation unit shown in the present embodiment is preferably a solar panel in order to reduce the facility cost and effectively utilize solar energy.
Meanwhile, the voltage conversion unit shown in this embodiment is specifically a DC/DC converter known in the art, and the DC/DC converter is used for performing voltage boosting and/or voltage dropping processing on the direct-current voltage output by the solar cell panel so as to meet the power consumption requirements of the fan 2 and various electrical devices of the low-voltage system on the working machine.
Further, the power generation unit shown in the present embodiment has a plate-like or hood-like shape; the power generation unit is arranged above the lithium ion battery 3 and the fan 2 when the power generation unit is in a plate shape; when the power generation unit is in the shape of a cover, the cover opening end of the power generation unit is used for connecting with the working machine, and the lithium ion battery 3 and the fan 2 are arranged in the power generation unit.
Here, the shape of the power generation unit shown in the present embodiment is not limited to a plate shape or a hood shape. When the power generation unit shown in this embodiment is preferably a solar cell panel, the solar cell panel may be disposed on the upper side of the lithium ion battery 3, or a plurality of solar cell panels may be disposed, and the plurality of solar cell panels may be disposed in the lateral direction of the lithium ion battery 3, or the plurality of solar cell panels may be combined to form an irregular structure, so that the power generation unit reliably shields the lithium ion battery 3 and also satisfies the power supply demand for the fan 2.
As shown in fig. 1 and 2, the solar cell panel of the present embodiment is horizontally disposed above the lithium ion battery 3 and the fan 2. So, solar cell panel plays the effect of shading to lithium ion battery 3, prevents that sunshine from producing direct exposure to lithium ion battery 3, and the electricity that solar cell panel sent can supply to lithium ion battery 3 and fan 2 again.
It should be noted that, in this embodiment, a box body with an upward opening may be disposed on the working machine, and in this embodiment, the lithium ion battery 3 and the fan 2 may be disposed in the box body.
In this embodiment, an angle adjusting mechanism may be further disposed at the open end of the box body, and the angle adjusting mechanism is connected to the power generating unit, and the angle adjusting mechanism may be a known turnover mechanism in the art. Here, this embodiment specifically can be connected angle adjustment mechanism and solar cell panel to setting up the illumination sensor who is connected with angle adjustment mechanism communication at solar cell panel's sunny side, thereby can be based on the illumination intensity that illumination sensor detected, adjusting angle adjustment mechanism's gesture, so that solar cell panel's sunny side can be better accept illumination, thereby improve solar cell panel's generating efficiency.
As shown in fig. 2, the present embodiment also provides a working machine including a cab 7 and a frame 8; the lithium ion battery parking protection device of the working machine is arranged on the frame 8, and is positioned at the rear side of the cab 7.
Specifically, since the working machine shown in this embodiment employs the lithium ion battery parking protection device and includes all technical solutions of the embodiments, at least all beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
The working machine shown in the present embodiment may be an excavator, a crane, a fire engine, and the like known in the art, and is not particularly limited herein.
As shown in fig. 4, this embodiment further provides a protection method for the lithium ion battery parking protection device of the working machine, which includes: s1, detecting the starting state of the working machine and the temperature of the lithium ion battery; and S2, when the operation machine is detected to be in a stop state, if the temperature of the lithium ion battery is higher than a preset value, the fan is started, and if the temperature of the lithium ion battery is lower than the preset value, the fan is closed or the fan is controlled to keep the stop state.
Specifically, this embodiment is when parking to lithium ion battery on the operation machinery carries out safety protection, through setting up power generation facility and fan, both can carry out the sunshade by power generation facility to lithium ion battery, prevent that the direct irradiation of sunshine from leading to lithium ion battery's high temperature, can be in the state of shutting down again at the operation machinery, based on the temperature judgement to lithium ion battery, control the open and close state of fan to create suitable environment of depositing for lithium ion battery, ensured lithium ion battery's life and deposited safety.
As shown in fig. 5, before S1, the present embodiment further includes: detecting the output current of the power generation device; if the power generation device does not output current, ending; if it is detected that the current output from the power generation device is greater than zero, it indicates that the power generation device is in power generation operation, and thus the detection operation of S1 may be performed.
Meanwhile, S2 shown in this embodiment further includes: when the operation machine is detected to be in the opening state, the SN enabling function of the fan controller is invalid, and a control instruction is not sent to the fan any more, at the moment, the complete machine controller on the operation machine receives the temperature information of the lithium ion battery detected by the temperature sensor, and controls the opening and closing state of the fan according to the temperature of the lithium ion battery. In the process, the power generation device also supplies power to a low-voltage system of the working machine, and the electric energy storage device in the low-voltage system can store the power generated by the power generation device, so that the energy conservation is realized.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A lithium ion battery of a work machine parks protector characterized by comprising: the power generation device comprises an sunny surface, a light shielding area is formed on one side of the sunny surface, which is far away from the power generation device, the lithium ion battery is installed in the light shielding area, and the light shielding area is used for shielding the lithium ion battery; and the number of the first and second groups,
the fan is electrically connected with the power generation device, and the air outlet side of the fan faces the lithium ion battery.
2. The lithium ion battery park guard of a work machine of claim 1, further comprising: a temperature sensor and a fan controller;
the temperature sensor is used for detecting the surface temperature of the lithium ion battery, the temperature sensor is in communication connection with the fan controller, the fan controller is electrically connected with the power generation device, and the fan controller is in communication connection with the fan.
3. The lithium ion battery parking guard of a work machine of claim 2, wherein the power system of the work machine is communicatively coupled to the fan controller, the fan controller is communicatively coupled to a complete machine controller on the work machine, and the complete machine controller is communicatively coupled to the fan.
4. The lithium ion battery park guard of a work machine according to claim 1, wherein the power generation device is electrically connected to an electrical energy storage device on the work machine, and/or wherein the fan is electrically connected to the electrical energy storage device.
5. The lithium ion battery parking guard of a work machine of claim 4, wherein the power generation device has a power generation unit and a voltage conversion unit;
the power generation unit is electrically connected with the voltage conversion unit; the voltage conversion unit is electrically connected with the electric energy storage device and the fan respectively.
6. The lithium ion battery park guard of a work machine according to claim 5, wherein the power generation unit comprises a solar panel or a thermoelectric panel.
7. The lithium ion battery parking guard for a work machine according to claim 5, wherein the power generation unit is shaped like a plate or a hood;
under the condition that the power generation unit is in a plate shape, the power generation unit is arranged on the upper sides of the lithium ion battery and the fan;
and under the condition that the power generation unit is in a cover shape, the cover opening end of the power generation unit is connected with the operation machine, and the lithium ion battery and the fan are arranged in the power generation unit.
8. A working machine comprises a cab and a frame; the lithium ion battery parking protection device for the working machine is characterized in that the lithium ion battery parking protection device for the working machine is mounted on the frame and is located on the rear side of the cab.
9. A method of protecting a lithium ion battery parking guard for a work machine according to any of claims 1 to 7, comprising:
s1, detecting the starting state of the working machine and the temperature of the lithium ion battery;
and S2, when the operation machine is detected to be in a stop state, if the temperature of the lithium ion battery is higher than a preset value, the fan is started, and if the temperature of the lithium ion battery is lower than the preset value, the fan is closed or the fan is controlled to keep the stop state.
10. The shielding method according to claim 9,
before S1, further comprising: detecting the output current of the power generation device; in a case where the current output of the power generation device is detected, the detection operation of S1 is performed;
s2 further includes: and when the operating machine is detected to be in the opening state, the complete machine controller on the operating machine controls the opening and closing state of the fan according to the temperature of the lithium ion battery.
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