CN213693215U - Power supply system of engineering machinery - Google Patents
Power supply system of engineering machinery Download PDFInfo
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- CN213693215U CN213693215U CN202022663753.4U CN202022663753U CN213693215U CN 213693215 U CN213693215 U CN 213693215U CN 202022663753 U CN202022663753 U CN 202022663753U CN 213693215 U CN213693215 U CN 213693215U
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Abstract
The utility model relates to an engineering machinery power supply system, in order to solve the problem that the stand-by time of a storage battery is short, the starting is difficult or unable to start because of the insufficient power of a storage battery is easily caused because of the excessive power consumption of the monitoring equipment of the existing engineering machinery power supply system, the utility model constructs an engineering machinery power supply system, which comprises a first storage battery, a key switch, a power relay, a starting relay, a generator, a starting motor, a monitoring load, an engine ECU, a complete machine controller and other electric devices, wherein the monitoring load is directly connected with the first storage battery; when the key switch is in the starting gear, the second storage battery supplies power to the starting motor, the engine ECU and the complete machine controller, and the engine can be normally started under the condition that the first storage battery is in a power-down state. Therefore, the phenomenon that the battery is difficult to start or cannot be started due to the fact that the monitoring equipment consumes too much electricity is avoided.
Description
Technical Field
The utility model relates to a power supply system, more specifically say, relate to an engineering machine tool electrical power generating system.
Background
A power supply system of a construction machine such as a loader or an excavator is shown in fig. 1, and mainly includes a battery 10, a key switch 3, a power supply relay 4, a starter relay 5, a generator 9, a starter motor 6, a monitoring load 2, and an overall electrical device. The whole electrical equipment comprises an engine ECU, a whole controller 7 and other electrical appliances 8.
The monitoring load 2 is directly connected with the storage battery 10, a first contact of the power supply relay 4 and an electrifying input end of the key switch 3 are connected with the storage battery 10, a second contact of the power supply relay 4 is connected with a first contact of the starting relay, the whole electrical equipment and the generator 9, an electrifying output end b of the key switch is connected with an electromagnetic coil of the power supply relay 4, a starting output end d of the key switch is connected with an electromagnetic coil of the starting relay 5, and a second contact of the starting relay is connected with the starting motor 6.
In the power supply system, when the key switch 3 is turned off, the whole electrical equipment does not work, only the monitoring type load 2 works, and the storage battery 10 supplies power at the moment. When the key switch 3 is turned on (in the power-on gear), the power-on input end a and the power-on output end b of the key switch 3 are conducted, the electromagnetic coil of the power relay is electrified, the first contact and the second contact of the power relay are closed and conducted, the whole electrical equipment and the monitoring equipment 2 work simultaneously, and the storage battery 10 supplies power at the moment. When the key switch 3 rotates to the starting gear, the electrifying input end a of the key switch 3 is simultaneously conducted with the electrifying output end b and the starting output end d, the electromagnetic coils of the power supply relay and the starting relay are electrified, the first contact and the second contact of the power supply relay are closed and conducted, and the first contact and the second contact of the starting relay 5 are closed and conducted. At the moment, the storage battery supplies power to the whole electrical equipment and the monitoring equipment and also supplies power to the starting motor, and the starting motor works to drive the engine. After the engine is started, the generator supplies power to the electrical equipment and the monitoring equipment of the whole machine, and meanwhile, the generator charges the storage battery through the power supply relay.
For the owner of some engineering machinery, in order to prevent a storage battery, diesel oil, a computer board and the like from being stolen when the engineering machinery is parked, extra high-power monitoring equipment is specially additionally arranged on the whole machine, the monitoring equipment comprises a plurality of cameras, an alarm and the like, peripheral conditions and related alarm information of the whole machine can be monitored in real time through mobile phone end or PC end software, the monitoring equipment directly takes electricity from a storage battery pack of the whole machine, the storage battery pack is powered by the storage battery pack only under the condition that the whole machine is not started, the storage battery pack is powered down within about 3-4 days, and the whole machine is started next time, so that the starting is difficult or cannot be started.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that current engineering machine tool electrical power generating system leads to storage battery standby time short, lead to easily because storage battery insufficient voltage starts the problem of difficulty or unable start-up because of the power consumptive much of supervisory equipment, provides an engineering machine tool electrical power generating system, ensures that the storage battery of complete machine has normal standby time, avoids leading to because storage battery insufficient voltage starts the phenomenon of difficulty or unable start-up because supervisory equipment is power consumptive too much.
The utility model discloses a realize that the technical scheme of its purpose is like: the engineering machinery power supply system is constructed and comprises a first storage battery, a key switch, a power supply relay, a starting relay, a generator, a starting motor, a monitoring load, an engine ECU (electronic control unit), a complete machine controller and other electric devices, wherein the monitoring load is directly connected with the first storage battery; and a first contact of the power supply relay is connected with the first storage battery, and a second contact of the power supply relay is connected with the generator and the other electric appliances.
The device is characterized by also comprising a second storage battery, a diode and a conversion relay.
The first contact of the starting relay is connected with the second storage battery, and the second contact is connected with the starting motor; the generator is connected with the second storage battery through a diode.
The power-on input end of the key switch is connected with the first storage battery, and the power-on output end of the key switch is connected with the electromagnetic coil of the power supply relay; the starting input end of the key switch is connected with the second storage battery, and the starting output end of the key switch is connected with the electromagnetic coil of the starting relay.
The engine ECU and the complete machine controller are connected with a movable contact of the conversion relay, a normally closed static contact of the conversion relay is connected with a second contact of the power supply relay, and a normally open static contact and an electromagnetic coil of the conversion relay are both connected with a starting output end of the key switch.
When the key switch is in the power-on gear, the power-on input end and the power-on output end of the key switch are connected, and the starting input end and the starting output end of the key switch are disconnected.
When the key switch is in the starting gear, the upper power input end and the upper power output end are conducted, and the starting input end and the starting output end are conducted; or the starting input end is simultaneously conducted with the starting output end and the electrifying output end when the key switch is in the starting gear.
The utility model discloses in, other electrical apparatus spare that use is the electrical apparatus except electrical apparatus spare such as engine ECU, complete machine controller, starter motor, control class load on the engineering machine tool, for example airborne air conditioner, lamps and lanterns, windscreen wiper etc..
In the utility model, when the key switch is in the closed state, the monitoring load is powered by the first storage battery only; when the key switch is in the upper gear, the power supply relay is closed, and the first storage battery supplies power to the monitoring load and the whole electrical equipment; when the key switch is in a starting gear, the starting relay is closed, the second storage battery supplies power to the starting motor, meanwhile, the movable contact and the normally open stationary contact of the switching relay are closed, and the second storage battery supplies power to the engine ECU and the complete machine controller through the key switch and the switching relay, so that the engine can be normally started. After the engine is started, the generator is in a power generation state, the key switch rotates to an upper electric gear, the starting input end and the starting output end of the key switch are disconnected, the electromagnetic coil of the switching relay is powered off, the movable contact and the normally closed stationary contact of the switching relay are closed, and the engine ECU and the complete machine controller are powered by the generator. The generator also charges the first storage battery through the power supply relay, and charges the second storage battery through the diode.
In the engineering machinery power supply system, the power supply relay is a time delay relay, and the time delay relay can ensure that the power supply relay keeps a closed state in the switching process of the key switch between the upper power gear and the starting gear.
In the power supply system of the engineering machinery, when the key switch is in the starting gear, the starting input end is simultaneously conducted with the starting output end, the electrifying output end and the electrifying input end, a second diode is arranged on a connecting circuit between the electrifying input end and the first storage battery, the anode of the second diode is connected with the first storage battery, and the cathode of the second diode is connected with the electrifying input end. When the first storage battery is in a serious power shortage state (for example, the current provided by the first storage battery cannot close the power supply relay), the power supply relay is powered by the second storage battery and is in a closed state, so that the generator can charge the first storage battery through the power supply relay after the engine is started. The second diode is used for preventing the second storage battery from charging the first storage battery through the starting input end and the power-on input end which are conducted in the key switch so as to shunt the current of the second storage battery when the engine is started.
Compared with the prior art, the utility model discloses in, when the engine was in the stall state, by first battery power supply, during the start engine, the starter motor had been ensured by second battery power supply, second battery that engineering machine tool has conventional standby time, also can normally start when even first battery insufficient voltage. Therefore, the phenomenon that the battery is difficult to start or cannot be started due to the fact that the monitoring equipment consumes too much electricity is avoided.
Drawings
Fig. 1 is a schematic diagram of a conventional power supply system for construction machinery.
Fig. 2 is a schematic diagram of the power supply system of the construction machine of the present invention.
Fig. 3 is a schematic diagram of a second embodiment of the power supply system of the construction machine according to the present invention.
Part names and serial numbers in the figure:
the system comprises a monitoring load 2, a key switch 3, a power supply relay 4, a starting relay 5, a starting motor 6, an engine ECU and a complete machine controller 7, other electrical appliances 8, a generator 9, a storage battery 10, a first storage battery 1, a second storage battery 11, a diode 12, a conversion relay 13 and a second diode 14.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 2, the power supply system of the construction machine in the embodiment includes a monitoring load 2, a key switch 3, a power supply relay 4, a starting relay 5, a starting motor 6, an engine ECU and a complete machine controller 7, other electrical appliances 8, a generator 9, a first storage battery 1, a second storage battery 11, a diode 12, and a transfer relay 13.
The monitoring load is directly connected with the first storage battery, and the monitoring load 2 is always powered by the first storage battery.
The power supply relay 4 is a time delay relay, a first contact of the time delay relay is connected with the first storage battery, and a second contact of the time delay relay is connected with the generator and other electric appliances.
A first contact of the starting relay 5 is connected with the second storage battery 11, and a second contact is connected with the starting motor 6; the generator 9 is connected to a second battery via a diode 12. The diode 12 is used to prevent the second battery from charging the first battery (the power supply relay is in a closed state) when the engine is started, and the generator can charge the first battery after the engine is started, and simultaneously can charge the second battery 11 through the diode 12.
The power-on input end a of the key switch 3 is connected with the first storage battery 1, and the power-on output end b is connected with the electromagnetic coil of the power supply relay 4; the starting input end c of the key switch 3 is connected with the second storage battery 11, and the starting output end d is connected with the electromagnetic coil of the starting relay 5.
The engine ECU and the complete machine controller 7 are connected with the movable contact 30 of the transfer relay 13, the normally closed stationary contact 87A of the transfer relay 13 is connected with the second contact of the power supply relay 4, and the normally open stationary contact 87 and the electromagnetic coil of the transfer relay 13 are both connected with the starting output end d of the key switch 13.
When the key switch 3 is in the power-on gear, the power-on input end a and the power-on output end b are conducted, and the starting input end c and the starting output end d are disconnected. When the key switch 3 is in the starting gear, the starting input end c is simultaneously conducted with the starting output end d and the electrifying output end b.
In this embodiment, the other electrical devices refer to electrical devices of the engineering machinery, such as an onboard air conditioner, a lamp, a wiper, and the like, except for electrical devices of an engine ECU, a complete machine controller, a starting motor, a monitoring load, and the like.
In the present embodiment, when the key switch 3 is in the off state (disconnected state), the monitoring type load 2 is supplied with power only from the first storage battery 1.
When the key switch 3 is in the power-on gear, if the first storage battery is not in power shortage, the electromagnetic coil of the power relay 4 is closed, and the first storage battery 1 supplies power to the monitoring load 2 and the whole electrical equipment. If the first storage battery is seriously insufficient, the first storage battery cannot drive the power supply relay to keep a closed state, and at the moment, the whole electric appliance cannot normally work.
When the key switch 3 is in the starting gear, the starting input end c of the key switch 3 is simultaneously conducted with the electrifying output end b and the starting output end d, the electromagnetic coil of the starting relay 5 is electrified by the power supply of the second storage battery 11, the starting relay 5 is closed, and the second storage battery 11 supplies power to the starting motor 6. The power supply relay 4 is also in a closed state due to the power supply of the second battery. Meanwhile, the electromagnetic coil of the switching relay 13 is powered on by the second storage battery 11, the movable contact 30 of the switching relay 13 is closed with the normally open stationary contact 87, and the second storage battery supplies power to the engine ECU and the complete machine controller 7 through the key switch and the switching relay, so that the engine can be normally started. After the engine is started, the generator is in a power generation state, the key switch 3 rotates to the upper power position, the starting input end and the starting output end of the key switch are disconnected, the electromagnetic coil of the switching relay 13 is powered off, the movable contact of the switching relay 13 is closed with the normally closed stationary contact 87A, and the engine ECU and the whole machine controller 7 are powered by the generator instead. The generator also charges the first battery 1 via the power relay 4 and the second battery 11 via the diode 12. Therefore, even if the first storage battery has serious power shortage, the engine can be started through the second storage battery, and the first storage battery can be charged and various electric appliances can be supplied with power after the generator works.
In this embodiment, when the key switch is in the starting gear, the conduction relationship between the power-on input end a, the power-on output end b, the starting input end c, and the starting output end d may also be: the power-on input end a is only conducted with the power-on output end, the starting input end c is only conducted with the starting output end d, and the power-on input end a is not conducted with the power-on output end.
In the present embodiment, when the engine is in the stopped state, power is supplied from the first battery 1; when the engine is started, the starting motor 6, the engine ECU and the complete machine controller 7 are all powered by the second storage battery 11, and the second storage battery 11 ensures that the engineering machinery has regular standby time and can be normally started even if the first storage battery 1 is in power shortage. Therefore, the phenomenon that the battery is difficult to start or cannot be started due to the fact that the monitoring equipment consumes too much electricity is avoided.
Example two.
As shown in fig. 3, compared with the first embodiment, the difference is that the start input end c is conducted with the start output end d, the power-on output end b and the power-on input end a when the key switch is in the start gear, a second diode 14 is arranged on a connection circuit between the power-on input end a and the first storage battery 1, the anode of the second diode 14 is connected with the first storage battery 1, and the cathode is connected with the power-on input end a. When the first storage battery is in a power shortage state, for example, the power supply relay 4 cannot be closed by the current provided by the first storage battery, the power supply relay 4 is powered by the second storage battery 11 and is in a closed state, so that the generator can charge the first storage battery through the power supply relay after the engine is started, and the generator keeps the power supply relay in a closed state through the closed power supply relay 4, the second diode and the key switch after the generator works. The second diode 14 has the function of preventing the second battery 11 from shunting the current of the second battery 11 when the engine is started by charging the first battery through the switched-on starting input c and the switched-on power input a of the key switch 3. In the scheme, as the key switch is switched from the starting gear to the power-on gear, the power-on output end b and the power-on input end a are always kept in a conducting state, the power supply relay 4 does not have a time delay function, the power supply relay is powered by the second storage battery to be closed in the starting gear, and the power supply relay is powered by the generator to be closed in the power-on gear.
Claims (3)
1. A power supply system of engineering machinery comprises a first storage battery (1), a key switch (3), a power supply relay (4), a starting relay (5), a generator (9), a starting motor (6), a monitoring load (2), an engine ECU, a complete machine controller and other electric devices (8), wherein the monitoring load is directly connected with the first storage battery; a first contact of the power supply relay (4) is connected with the first storage battery, and a second contact of the power supply relay is connected with the generator and the other electric appliances;
the device is characterized by also comprising a second storage battery (11), a diode (12) and a conversion relay (13);
the first contact of the starting relay is connected with the second storage battery, and the second contact is connected with the starting motor; the generator is connected with the second storage battery through a diode;
the power-on input end (a) of the key switch is connected with the first storage battery, and the power-on output end (b) of the key switch is connected with the electromagnetic coil of the power supply relay; the starting input end (c) of the key switch is connected with the second storage battery, and the starting output end (d) of the key switch is connected with the electromagnetic coil of the starting relay;
the engine ECU and the complete machine controller are connected with a movable contact of the conversion relay, a normally closed stationary contact of the conversion relay is connected with a second contact of the power supply relay, and a normally open stationary contact and an electromagnetic coil of the conversion relay are both connected with a starting output end of the key switch;
when the key switch is in the power-on gear, the power-on input end (a) and the power-on output end (b) are conducted, and the starting input end (c) and the starting output end (d) are disconnected;
when the key switch is in a starting gear, the upper electricity input end (a) and the upper electricity output end (b) are conducted, and the starting input end (c) and the starting output end (d) are conducted; or when the key switch is in the starting gear, the starting input end (c) is simultaneously conducted with the starting output end (d) and the electrifying output end (b).
2. The power supply system for construction machinery according to claim 1, wherein the power supply relay is a time delay relay.
3. The power supply system of the engineering machinery according to claim 1 or 2, wherein the start input end (c) is simultaneously conducted with the start output end (d) and the power-on output end (b) and the power-on input end (a) when the key switch is in the start gear, a second diode is arranged on a connecting circuit between the power-on input end (a) and the first storage battery, the anode of the second diode is connected with the first storage battery, and the cathode of the second diode is connected with the power-on input end (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022663753.4U CN213693215U (en) | 2020-11-18 | 2020-11-18 | Power supply system of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022663753.4U CN213693215U (en) | 2020-11-18 | 2020-11-18 | Power supply system of engineering machinery |
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| Publication Number | Publication Date |
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| CN213693215U true CN213693215U (en) | 2021-07-13 |
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| CN202022663753.4U Active CN213693215U (en) | 2020-11-18 | 2020-11-18 | Power supply system of engineering machinery |
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| CN (1) | CN213693215U (en) |
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- 2020-11-18 CN CN202022663753.4U patent/CN213693215U/en active Active
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