CN220775635U - DC power supply device with safe power supply - Google Patents

Abstract

The direct-current power supply device with safe power supply comprises a basic power supply, a power management board and a two-way switch; the power management board is provided with a J1 power interface, a J2 input interface, a J3 output interface and a J5 control interface, wherein the J5 control interface is communicated with a J5 control path in the two-way switch, and the J3 output interface and the J3 control path of the two-way switch are communicated with an output socket; the J1 power interface is communicated with a basic power supply. When the power supply is applied, the electric appliance is communicated with the output socket, the two-way switch is turned on, the J3 control path and the J5 control path form paths, the paths are formed between the J3 output interface and the electric appliance, the J5 control interface enables the J3 output interface to output voltage, when the power supply is stopped, the two-way switch is turned off, the J3 output interface and the electric appliance are disconnected to avoid reverse charging of the device, and the J5 control interface controls the J3 output interface to not output voltage to save electric energy. Therefore, the design not only can safely supply power, but also can save electric energy.

Description

DC power supply device with safe power supply

Technical Field

The utility model relates to a power supply device, belongs to the field of power supply, and particularly relates to a direct current power supply device with safe power supply.

Background

During field exploration, scientific instruments are often required to be used for observation, and safe and effective power supply for the scientific instruments is very important.

The Chinese patent with application number of 202120711264.3 and application date of 2021, 04 and 08 discloses a multifunctional portable energy storage power supply, which comprises a box body, a lithium base power supply, an inverter, an alternating current socket, an overload protector, a mobile phone charging module, an LED lamp, a DC-DC constant voltage conversion module, a direct current socket and a charging socket; the lithium base power supply converts a direct current power supply into an alternating current power supply through an inverter and inputs the alternating current power supply into an alternating current socket; the lithium base power supply respectively inputs a direct current power supply to the LED lamp and the mobile phone charging module through the overload protector; the lithium base power supply inputs a direct current power supply to the DC-DC constant voltage conversion module through the overload protector, and the DC-DC constant voltage conversion module inputs the direct current power supply to the direct current socket; this lithium foundation power is with direct current power input to socket that charges, although this design convenient to use to output power noiseless, pollution-free, energy-concerving and environment-protective, waterproof dustproof still have following defect:

when the electric appliance is not pulled out, the circuit from the lithium base power supply to the mobile phone charging module or the charging socket cannot be disconnected, so that the electric appliance is reversely charged, and the electric appliance is dangerous.

The disclosure of this background section is only intended to increase the understanding of the general background of the application and should not be taken as an admission or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to overcome the defect and problem of the prior art that the power is dangerous in use, and provides a direct current power supply device with safe power supply.

In order to achieve the above object, the technical solution of the present utility model is:

the device comprises a basic power supply, a power management board and a two-way switch;

the power management board comprises a J1 power interface, a J2 input interface, a J3 output interface and a J5 control interface, wherein a J5 round corner and a J5 square corner are arranged in the J5 control interface, the J5 round corner and the J5 square corner are communicated through a J5 jumper wire, the J5 jumper wire is communicated with a J5 control path in the two-way switch, the J3 output interface is provided with a J3 output positive electrode and a J3 output negative electrode, the J3 output positive electrode is communicated with a J3 positive electrode wire, the J3 positive electrode wire is communicated with one end of a J3 control path of the two-way switch, the other end of the J3 control path is communicated with an output socket through an output wire, the J3 output negative electrode is communicated with a J3 negative electrode wire, and the J3 negative electrode wire is communicated with the output socket;

the J1 power interface comprises a J1 positive electrode and a J1 negative electrode, wherein the J1 positive electrode is communicated with a basic power supply positive electrode of a basic power supply through a J1 positive electrode wire, and the J1 negative electrode is communicated with a basic power supply negative electrode of the basic power supply through a J1 negative electrode wire;

the J2 input interface is communicated with an input socket through an input line.

And the output wire is connected with the J3 positive electrode wire after being communicated with the diode.

The power management board is internally provided with a constant voltage current module, one end of the constant voltage current module is communicated with the J1 power interface, and the other end of the constant voltage current module is communicated with the J3 output interface.

The basic power supply anode is communicated with the display anode of the electric quantity display, and the basic power supply cathode is communicated with the display cathode of the electric quantity display.

And the electric quantity display is also provided with a P electrode, and the P electrode is communicated with the J1 power interface.

The basic power supply is a polymer lithium battery pack with multiple strings and groups connected in parallel.

The basic power supply is a polymer lithium battery pack with three strings and multiple groups connected in parallel.

The device is also provided with a shell and an upper cover which are detachably connected;

the shell is internally provided with a cavity, the cavity is internally provided with a basic power supply and a power supply management board, the basic power supply is positioned at the position of the cavity close to the right side, the power supply management board is positioned at the position of the cavity close to the left side, the surface of one side of the shell is provided with a switch hole, an input socket hole and an output socket hole, the switch hole is a through hole, the two-way switch is inlaid in the switch hole, and the switch side of the two-way switch faces the outer side of the device; the input socket hole is a through hole, and the socket side of the input socket faces the outer side of the device; the output socket hole is a through hole, and the socket side of the output socket faces the outer side of the device.

The outer side of the two-way switch is connected with a switch waterproof cover, the switch waterproof cover is provided with a protruding cover, and the protruding cover is hinged with one side of the switch waterproof cover; the outer side of the input socket is connected with the socket waterproof cover, and the outer side of the output socket is connected with the socket waterproof cover; the socket waterproof covers are identical in structure, the socket waterproof covers are provided with fixing rings, the fixing rings are sleeved on the input socket or the output socket, the fixing rings are connected with the top cover through fixing strips, and the top cover is sleeved outside the fixing rings.

Shell fixing holes are formed in the periphery of the top of the shell, the shell fixing holes are counter bores which are open in one direction and face the upper side of the shell, and fixing screws are inserted into the shell fixing holes;

the upper cover is provided with a cover fixing hole corresponding to the shell fixing hole, the cover fixing hole is a through hole, and the fixing screw penetrates through the cover fixing hole and the shell fixing hole.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model relates to a direct current power supply device with safe power supply, which comprises a basic power supply, a power supply management board and a double-circuit switch, wherein the power supply management board comprises a J1 basic power supply interface, a J2 input interface, a J3 output interface and a J5 control interface, the J5 control interface is connected through a J5 jumper wire, the J5 jumper wire is also connected with a J5 control circuit of the double-circuit switch, the J3 output interface is connected with one end of the J3 control circuit of the double-circuit switch through a J3 positive line, and the other end of the J3 control circuit is connected with an output socket; the J1 basic power interface is connected with the basic power, the J2 input interface is connected with the input socket, the electric appliance is connected with the output socket during application, the two-way switch is opened, the J5 jumper wire forms a passage to control the output voltage of the J3 output interface, the J3 control passage is communicated with the electric appliance, namely the electric appliance can be electrified, the J5 jumper wire is disconnected by using the two-way switch when the electric appliance is powered off, so that the J3 output interface closes the voltage output, and the J3 control passage disconnects the passage from the J3 positive wire to the output socket, namely the connection between the electric appliance and the device is disconnected; if only the J3 positive line is disconnected to the output socket, the power management board continuously works, so that the basic power loss is increased, the energy saving is not facilitated, and if only the J5 jumper wire is disconnected, the J3 positive line and the electric appliance are still a passage, the device has the possibility of being reversely charged by the electric appliance, and the safety of the electric appliance and the basic power supply is not facilitated; after the two-way switch is closed, the J5 jumper wire can be disconnected to stop the output voltage of the J3 output interface, and the circuit from the J3 output interface to the electric appliance can be disconnected to avoid reverse charging, so that the danger of reverse charging caused by the leakage of the electric appliance is avoided. Therefore, the utility model can not only safely supply power, but also save electric energy.

2. In the direct current power supply device with safe power supply, the diode is communicated with the output wire, when the direct current power supply device is used, the diode has unidirectional conductive property, so that a passage is formed among the diode, the positive electrode wire of J3 and the negative electrode wire of J3, and the lamp tube is arranged on the diode, so that when current passes through, the lamp tube emits a bright prompt, whether the device has voltage output or not can be observed, and whether maintenance is needed for observation equipment is convenient. Therefore, the utility model is convenient for inspection.

3. In the direct current power supply device with safe power supply, the constant voltage current module is arranged in the power supply management board, when the direct current power supply device is applied, the output current of the cathode of the basic power supply enters the constant voltage current module after passing through the J1 basic power supply interface, is processed into constant voltage current by the constant voltage current module, and is connected with an electric appliance through the J3 output interface, so that the output current is prevented from generating voltage drop due to the reduction of the electric quantity of the basic power supply, and a precise instrument is prevented from being damaged, and scientific observation is prevented from being influenced. Therefore, the present utility model can output a constant voltage current.

4. The utility model relates to a direct current power supply device with safe power supply, wherein an electric quantity display is arranged in the device, the electric quantity display is communicated with two poles of a basic power supply, the electric quantity display is communicated with a J1 basic power supply interface, when the device is used for supplying power to an electric appliance, a positive electrode line of the basic power supply is connected with the J1 basic power supply interface of a power management board through the electric quantity display, then the J3 output positive electrode and the J3 output negative electrode of a J3 output interface of the power management board are used for supplying power to the electric appliance, the electric quantity display can accurately measure and display the information of the electric quantity percentage, the load current, the voltage, the charge and discharge state and the like of the basic power supply, and the state of the basic power supply can be observed in time, so that the electric appliance is prevented from being damaged due to inaccurate current or voltage. Therefore, the utility model has accurate electric quantity information.

5. In the direct current power supply device with safe power supply, the basic power supply is a plurality of strings of polymer lithium basic battery packs which are connected in parallel with 12 volts and 30000 milliamperes, and when the direct current power supply device is applied, the polymer lithium basic battery packs have large capacity, can provide long-time power supply for electric appliances, and can replace polymer lithium basic battery packs with different capacities according to the requirement if larger electric quantity is required. Therefore, the device has large battery capacity and the battery can be replaced.

6. The utility model relates to a direct current power supply device with safe power supply, which also comprises a shell and an upper cover, wherein the upper cover is covered on the top of the shell, the periphery of the upper cover is detachably connected with the periphery of the shell through a fixing screw, a basic power supply and a power supply management board are accommodated in the shell, a two-way switch, an input socket and an output socket are embedded on one side surface of the shell, a switch waterproof cover is sleeved outside the two-way switch, a socket waterproof cover is sleeved outside the input socket and the output socket, and when the direct current power supply device is used, if the internal condition of the device is to be observed, the fixing screw can be unscrewed and then the upper cover is taken off for observation; the two-way switch, the input socket and the output socket are sleeved with waterproof covers, and the shell also has a waterproof function, so that the device can adapt to humid, watery or rainy environments. Therefore, the utility model has wide application and wide application range.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged view of the two-way switch of fig. 1.

Fig. 3 is a circuit diagram of fig. 1.

Fig. 4 is a block diagram of the power management board of fig. 1.

Fig. 5 is a front view of the power display of fig. 1.

Fig. 6 is a schematic diagram of the power display in fig. 1.

Fig. 7 is a front view of embodiment 6.

Fig. 8 is a schematic structural diagram of embodiment 6.

In the figure: basic power 1, basic power positive 11, basic power negative 12, power management board 2, J1 basic power interface 21, J1 positive 211, J1 negative 212, J1 positive line 213, J1 negative line 214, J2 input interface 22, J3 output interface 23, J3 output positive 231, J3 output negative 232, J3 positive line 233, J3 negative line 234, J5 control interface 24, J5 rounded corner 241, J5 square corner 242, J5 jumper 243, constant voltage current module 25, two-way switch 3, J5 control 31, J3 control 32, switch waterproof 33, raised cover 34, output line 4, diode 41, output socket 5, input line 6, input socket 7, power display 8, display positive 81, display negative 82, P-pole 83, housing 9, cavity 91, switch hole 92, input socket hole 93, output socket hole 94, housing fixing hole 95, fixing screw 96, upper cover 10, cover fixing hole 101, waterproof cover 13, fixing ring 111, fixing bar 112, top cover 113.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings and detailed description.

Referring to fig. 1-8, a dc power supply device with safe power supply includes a base power supply 1, a power management board 2 and a two-way switch 3;

the power management board 2 comprises a J1 power interface 21, a J2 input interface 22, a J3 output interface 23 and a J5 control interface 24, wherein a J5 round corner 241 and a J5 square corner 242 are arranged in the J5 control interface 24, the J5 round corner 241 and the J5 square corner 242 are communicated through a J5 jumper 243, the J5 jumper 243 is communicated with a J5 control path 31 in the two-way switch 3, the J3 output interface 23 is provided with a J3 output positive electrode 231 and a J3 output negative electrode 232, the J3 output positive electrode 231 is communicated with a J3 positive electrode wire 233, the J3 positive electrode wire 233 is communicated with one end of a J3 control path 32 of the two-way switch 3, the other end of the J3 control path 32 is communicated with the output socket 5 through an output wire 4, the J3 output negative electrode 232 is communicated with a J3 negative electrode wire 234, and the J3 negative electrode wire 234 is communicated with the output socket 5;

the J1 power interface 21 comprises a J1 positive electrode 211 and a J1 negative electrode 212, wherein the J1 positive electrode 211 is communicated with the basic power supply positive electrode 11 of the basic power supply 1 through a J1 positive electrode line 213, and the J1 negative electrode 212 is communicated with the basic power supply negative electrode 12 of the basic power supply 1 through a J1 negative electrode line 214;

the J2 input interface 22 communicates with the input socket 7 via the input line 6.

The output line 4 is connected to the positive electrode line 233 of J3 after the diode 41 is connected.

The power management board 2 is internally provided with a constant voltage current module 25, one end of the constant voltage current module 25 is communicated with the J1 power interface 21, and the other end of the constant voltage current module 25 is communicated with the J3 output interface 23.

The basic power supply anode 11 is communicated with the display anode 81 of the electric quantity display 8, and the basic power supply cathode 12 is communicated with the display cathode 82 of the electric quantity display 8.

The power display 8 is also provided with a P electrode 83, and the P electrode 83 is communicated with the J1 power interface 21.

The basic power supply 1 is a polymer lithium battery pack with multiple strings and groups connected in parallel.

The basic power supply 1 is a polymer lithium battery pack with three strings connected in parallel.

The device is also provided with a shell 9 and an upper cover 10 which are detachably connected;

the shell 9 is internally provided with a cavity 91, the cavity 91 accommodates a basic power supply 1 and a power management board 2, the basic power supply 1 is positioned at a position close to the right side of the cavity 91, the power management board 2 is positioned at a position close to the left side of the cavity 91, one side surface of the shell 9 is provided with a switch hole 92, an input socket hole 93 and an output socket hole 94, the switch hole 92 is a through hole, the two-way switch 3 is embedded in the switch hole 92, and the switch side of the two-way switch 3 faces the outer side of the device; the input socket hole 93 is a through hole, and the socket side of the input socket 7 faces the outside of the device; the outlet socket 94 is a through hole, and the outlet side of the outlet socket 5 faces the outside of the device.

The outer side of the two-way switch 3 is connected with a switch waterproof cover 33, the switch waterproof cover 33 is provided with a protruding cover 34, and the protruding cover 34 is hinged with one side of the switch waterproof cover 33; the outer side of the input socket 7 is connected with a socket waterproof cover 13, and the outer side of the output socket 5 is connected with the socket waterproof cover 13; the socket waterproof covers 13 are identical in structure, the socket waterproof covers 13 are provided with fixing rings 111, the fixing rings 111 are sleeved on the input socket 7 or the output socket 5, the fixing rings 111 are connected with a top cover 113 through fixing strips 112, and the top cover 113 is sleeved outside the fixing rings 111.

Shell fixing holes 95 are formed in the periphery of the top of the shell 9, the shell fixing holes 95 are counter bores which are open in one direction and face the upper side of the shell 9, and fixing screws 96 are inserted into the shell fixing holes 95;

the upper cover 10 is provided with a cover fixing hole 101 corresponding to the case fixing hole 95, the cover fixing hole 101 is a through hole, and the fixing screw 96 passes through the cover fixing hole 101 and the case fixing hole 95.

The supplementary explanation of the present utility model is as follows:

the design purpose of the utility model is as follows: at present, various field scientific observation instruments in China, such as GNSS receivers, seismometers, gravimeters and the like, are almost powered by a direct current power supply, but the built-in batteries of the instruments have small universal capacity, so that the stand-by time of the instruments is short. If long-time observation is performed under the condition of no commercial power in the field, a user usually uses an external lead-acid storage battery or a lithium battery pack and the like to supply power for the instrument so as to prolong the working time of the instrument. However, the power supply has the advantages of large volume and weight, poor power supply quality, simple power quantity display function, almost no waterproof performance, easy failure of the power supply body under severe weather conditions, incapability of supplying power to the instrument, and general problems of supplying power to the observation instrument and long-term endurance are encountered in field observation at present, so that when various domestic field scientific observation instruments are used, a universal and portable direct-current power supply device with safe power supply is urgently needed, and the universal and portable direct-current power supply device is used as an external power supply to meet the requirements of different instruments and environments. Most of the power products on the market are simple in structure and single in function, the electric quantity estimated by means of the battery voltage is displayed inaccurately, and the output voltage can generate 2-3V voltage drop along with the electric quantity reduction, so that the observation precision of an instrument can be affected, and even hardware equipment can be damaged. Aiming at the precise power supply requirement of various field scientific observation instruments in China at present, the power supply device also needs to be added with the functions of electric quantity display and constant voltage output current, and stable power supply support is provided for the field observation instruments. The power management board 2 is arranged in the device, so that the output voltage range can be adjusted according to the equipment requirement; the capacity of the basic power supply 1 can be adjusted according to the task requirement, and the universalization, miniaturization and light weight can be realized under the condition of guaranteeing the use requirement; the mains supply and the basic power supply 1 are seamlessly switched, and the basic power supply 1 can be charged without disconnecting a load; the power management board 2 can keep constant voltage direct current output, so that voltage drop caused by the decrease of the electric quantity of the battery is avoided, and the precision instrument is damaged to influence scientific observation; the power display 8 can precisely display the power percentage, voltage, load current, charge and discharge states of the basic power supply 1, and is convenient for observing the operation of the basic power supply 1.

Example 1:

referring to fig. 1-8, a dc power supply device with safe power supply includes a base power supply 1, a power management board 2 and a two-way switch 3; the power management board 2 comprises a J1 power interface 21, a J2 input interface 22, a J3 output interface 23 and a J5 control interface 24, wherein a J5 round corner 241 and a J5 square corner 242 are arranged in the J5 control interface 24, the J5 round corner 241 and the J5 square corner 242 are communicated through a J5 jumper 243, the J5 jumper 243 is communicated with a J5 control path 31 in the two-way switch 3, the J3 output interface 23 is provided with a J3 output positive electrode 231 and a J3 output negative electrode 232, the J3 output positive electrode 231 is communicated with a J3 positive electrode wire 233, the J3 positive electrode wire 233 is communicated with one end of a J3 control path 32 of the two-way switch 3, the other end of the J3 control path 32 is communicated with the output socket 5 through an output wire 4, the J3 output negative electrode 232 is communicated with a J3 negative electrode wire 234, and the J3 negative electrode wire 234 is communicated with the output socket 5; the J1 power interface 21 comprises a J1 positive electrode 211 and a J1 negative electrode 212, wherein the J1 positive electrode 211 is communicated with the basic power supply positive electrode 11 of the basic power supply 1 through a J1 positive electrode line 213, and the J1 negative electrode 212 is communicated with the basic power supply negative electrode 12 of the basic power supply 1 through a J1 negative electrode line 214; the J2 input interface 22 communicates with the input socket 7 via the input line 6.

When the power supply device is used, when the device is needed to supply power to an electric appliance, the electric appliance is connected with the output socket 7, the two-way switch 3 is opened, the J5 control circuit 31 is communicated with the J3 control circuit 32, the J5 control circuit 31 is communicated, the J5 jumper 243 enables the J3 output interface 23 to output voltage, the J3 control circuit 32 is communicated, the J3 positive electrode wire 231 is communicated, a passage is formed among the J3 positive electrode wire 231, the electric appliance and the J3 negative electrode wire 234, and the voltage of the basic power supply 1 can be transmitted to the electric appliance through the J1 power interface 21, so that the effect of supplying power to the electric appliance is realized; when the device is required to stop supplying power to an electric appliance, the two-way switch 3 is firstly turned off, the J5 control circuit 31 is disconnected from the J3 control circuit 32, so that the J5 jumper is disconnected because the J5 control circuit 31 is disconnected, the J3 output interface 23 cannot output voltage, the J3 control circuit 32 is disconnected, so that the J3 positive line 231 is disconnected, and the J3 positive line 231, the electric appliance and the J3 negative line 234 are disconnected; the J5 control circuit 31 is disconnected from the J3 control circuit 32, so that an output circuit (a J3 positive electrode wire 231, an electric appliance and a J3 negative electrode wire 234) between the electric appliance and the device is disconnected, and the J3 output interface 23 cannot output voltage, thereby achieving the purposes of safe electricity utilization and electric energy saving. When the device is required to be charged, the commercial power or an external charging device is rectified by the power adapter and then is communicated with the input socket 7, the current is transmitted to the J2 input interface 22 through the input wire 6, then the J1 power interface 21 is connected with the basic power supply 1 to charge the basic power supply 1, and the two-way switch 3 can be an R19 12V6A4 pin two-way 2-gear switch.

Example 2:

the basic content is the same as in example 1, except that:

referring to fig. 1-3, the output line 4 is connected to the positive electrode line 233 of J3 after the diode 41 is connected.

When the device is needed to supply power to the electric appliance, the electric appliance is connected with the output socket 7, the two-way switch 3 is opened, the J5 jumper 243 forms a passage, the J3 positive line 231 and the electric appliance are connected with the J3 negative line 234, and the diode 41 is positioned on the passage, so that when current passes through the passage, the diode 41 can give out a light prompt, and the device can be used for checking whether the circuit is communicated. The diode 41 may also be placed in the two-way switch 3.

Example 3:

the basic content is the same as in example 1, except that:

referring to fig. 1-4, a constant voltage current module 25 is disposed in the power management board 2, one end of the constant voltage current module 25 is connected to the J1 power interface 21, and the other end of the constant voltage current module 25 is connected to the J3 output interface 23.

When the device is used for supplying power to an electric appliance, the electric appliance is connected with the output socket 7, the two-way switch 3 is opened, the current of the basic power supply 1 flows into the J1 power interface 21 through the basic power supply negative electrode 12, then the current is processed into constant voltage current through the constant voltage current module 25 and then reaches the J3 output interface 23, the current is transmitted to the electric appliance through the J3 output interface 23 through the J3 negative electrode line 234, the current processed through the constant voltage current module 25 is stable, the circuit of the electric appliance cannot be damaged due to the fact that the current is negligent, the service life of the electric appliance is prolonged, the model of the power management board 2 can be selected as UPS-1228-12, the voltage of 12 to 28 volts can be input to the basic power supply 1, the constant voltage output can be carried out when the voltage is stabilized between 5 to 20 volts, the influence of the power supply voltage of an external input end and the voltage of the basic power supply 1 can be avoided, and the constant voltage current module 25 can be selected as the LTC3780 high-frequency synchronizer switch buck controller.

Example 4:

the basic content is the same as in example 1, except that:

referring to fig. 1-6, the positive electrode 11 of the basic power supply is communicated with the display positive electrode 81 of the electric quantity display 8, and the negative electrode 12 of the basic power supply is communicated with the display negative electrode 82 of the electric quantity display 8. The power display 8 is also provided with a P electrode 83, and the P electrode 83 is communicated with the J1 power interface 21.

When the power supply is applied, the basic power supply 1 is communicated with the display positive electrode 81 and the display negative electrode 82 of the power supply display 8 and the P electrode 83, current reaches the J1 basic power supply interface 21 after reaching the power supply display 8 from the basic power supply 1, or current reaches the basic power supply 1 after reaching the power supply display 8 from the J1 basic power supply interface 21, the power supply display 8 is used for measuring and displaying various data and states of the basic power supply 1, for example, the power percentage, the voltage, the load current, the charge and discharge state and the like of the basic power supply 1 can be monitored, and the model of the power supply display 8 can be selected from TY02B.

Example 5:

the basic content is the same as in example 1, except that:

referring to fig. 1-3, the basic power supply 1 is a multi-string multi-group parallel polymer lithium battery pack. The basic power supply 1 is a polymer lithium battery pack with three strings connected in parallel.

When the device is applied, the voltage of the polymer lithium battery pack is 12 volts, when the capacity of the polymer lithium battery pack is 30000 milliamperes, the polymer lithium battery packs with different capacities can be replaced according to the needs, and a plurality of the devices can be connected in series to achieve the purpose of larger electric quantity; besides, a heat insulation material or a heat dissipation component can be added in the device to cope with the ambient temperature of-10 ℃ to 40 ℃.

Example 6:

the basic content is the same as in example 1, except that:

referring to fig. 1-8, the device is further provided with a housing 9 and an upper cover 10 which are detachably connected; the shell 9 is internally provided with a cavity 91, the cavity 91 accommodates a basic power supply 1 and a power management board 2, the basic power supply 1 is positioned at a position close to the right side of the cavity 91, the power management board 2 is positioned at a position close to the left side of the cavity 91, one side surface of the shell 9 is provided with a switch hole 92, an input socket hole 93 and an output socket hole 94, the switch hole 92 is a through hole, the two-way switch 3 is embedded in the switch hole 92, and the switch side of the two-way switch 3 faces the outer side of the device; the input socket hole 93 is a through hole, and the socket side of the input socket 7 faces the outside of the device; the outlet socket 94 is a through hole, and the outlet side of the outlet socket 5 faces the outside of the device. The outer side of the two-way switch 3 is connected with a switch waterproof cover 33, the switch waterproof cover 33 is provided with a protruding cover 34, and the protruding cover 34 is hinged with one side of the switch waterproof cover 33; the outer side of the input socket 7 is connected with a socket waterproof cover 13, and the outer side of the output socket 5 is connected with the socket waterproof cover 13; the socket waterproof covers 13 are identical in structure, the socket waterproof covers 13 are provided with fixing rings 111, the fixing rings 111 are sleeved on the input socket 7 or the output socket 5, the fixing rings 111 are connected with a top cover 113 through fixing strips 112, and the top cover 113 is sleeved outside the fixing rings 111. Shell fixing holes 95 are formed in the periphery of the top of the shell 9, the shell fixing holes 95 are counter bores which are open in one direction and face the upper side of the shell 9, and fixing screws 96 are inserted into the shell fixing holes 95; the upper cover 10 is provided with a cover fixing hole 101 corresponding to the case fixing hole 95, the cover fixing hole 101 is a through hole, and the fixing screw 96 passes through the cover fixing hole 101 and the case fixing hole 95.

When the power management board is applied, all the fixing screws 96 are screwed out of the cover fixing holes 101 and the shell fixing holes 95 in sequence, then the upper cover 10 is taken out, the condition of the cavity 91 can be directly observed, one side wall of the power management board 2 is fixed on the right side wall of the cavity 91 through a back adhesive velcro, the basic power supply 1 is positioned on the left side of the cavity 91, and the periphery of the basic power supply 1 is filled with fireproof foaming materials, so that the basic power supply 1 is not contacted with the side wall of the cavity 91 or the power management board 2, and the relative positions are fixed; the surface of the shell 9 is provided with a switch hole 92, an input socket hole 93 and an output socket hole 94, and the three holes can be treated by using an internal waterproof pouring sealant or a waterproof sealing adhesive tape so as to improve the waterproof performance of the shell 9; the switch waterproof cover 33 on the outer side of the two-way switch 3 can be opened and closed, the two-way switch is convenient to use when opened, the two-way switch 3 and other parts are prevented from being damaged due to the fact that water enters the two-way switch 3 when closed, and the socket waterproof cover 13 is also arranged outside the input socket 7 and the output socket 5 and is used for preventing water from entering the input socket 7 or the output socket 5 to damage the parts; the fixing ring 111 is connected with the top cover 113 through the fixing strip 112, after the top cover 113 is unscrewed, the external device is connected with the input socket 7 or the output socket 5, and the top cover 113 is fixedly connected with the fixing strip 112, so that the top cover 113 is not required to be lost; the shell 9 can be an AG waterproof box junction box, the length can be 200 mm, the width can be 150 mm, the height can be 100 mm, and the size of the shell 9 is small, so that the device is convenient to carry, the input socket 7 can be an HK13-2p waterproof aviation socket, and the output socket 5 can be an HK16-2p waterproof aviation socket.

The above description is merely of preferred embodiments of the present utility model, and the scope of the present utility model is not limited to the above embodiments, but all equivalent modifications or variations according to the present disclosure will be within the scope of the claims.

Claims (10)

1. The utility model provides a direct current power supply device of power supply safety which characterized in that: the device comprises a basic power supply (1), a power management board (2) and a two-way switch (3);

the power management board (2) comprises a J1 power interface (21), a J2 input interface (22), a J3 output interface (23) and a J5 control interface (24), wherein a J5 round corner (241) and a J5 square corner (242) are arranged in the J5 control interface (24), the J5 round corner (241) and the J5 square corner (242) are communicated through a J5 jumper (243), the J5 jumper (243) is communicated with a J5 control circuit (31) in a double-way switch (3), the J3 output interface (23) is provided with a J3 output positive electrode (231) and a J3 output negative electrode (232), the J3 output positive electrode (231) is communicated with a J3 positive electrode wire (233), the J3 positive electrode wire (233) is communicated with one end of a J3 control circuit (32) of the double-way switch (3), the other end of the J3 control circuit (32) is communicated with an output socket (5) through an output wire (4), the J3 output negative electrode (232) is communicated with a J3 negative electrode wire (234), and the J3 negative electrode wire (234) is communicated with the output socket (5).

The J1 power interface (21) comprises a J1 positive electrode (211) and a J1 negative electrode (212), wherein the J1 positive electrode (211) is communicated with a basic power supply positive electrode (11) of a basic power supply (1) through a J1 positive electrode line (213), and the J1 negative electrode (212) is communicated with a basic power supply negative electrode (12) of the basic power supply (1) through a J1 negative electrode line (214);

the J2 input interface (22) is communicated with the input socket (7) through an input line (6).

2. A power-safe dc power supply device according to claim 1, characterized in that: the output line (4) is connected with the J3 positive electrode line (233) after being communicated with the diode (41).

3. A power-safe dc power supply device according to claim 1, characterized in that: the power management board (2) is internally provided with a constant voltage current module (25), one end of the constant voltage current module (25) is communicated with the J1 power interface (21), and the other end of the constant voltage current module (25) is communicated with the J3 output interface (23).

4. A power-safe dc power supply device according to claim 1, characterized in that: the basic power supply anode (11) is communicated with the display anode (81) of the electric quantity display (8), and the basic power supply cathode (12) is communicated with the display cathode (82) of the electric quantity display (8).

5. The power-safe direct-current power supply device according to claim 4, wherein: the electric quantity display (8) is also provided with a P electrode (83), and the P electrode (83) is communicated with the J1 power interface (21).

6. A power-safe dc power supply device according to claim 1, characterized in that: the basic power supply (1) is a polymer lithium battery pack with multiple strings and groups connected in parallel.

7. The power-safe direct-current power supply device according to claim 6, wherein: the basic power supply (1) is a polymer lithium battery pack which is formed by three strings of polymer lithium battery packs connected in parallel.

8. A power-safe dc power supply device according to claim 1, characterized in that: the device is also provided with a shell (9) and an upper cover (10) which are detachably connected;

the power management device is characterized in that a cavity (91) is formed in the shell (9), a basic power supply (1) and a power management board (2) are arranged in the cavity (91), the basic power supply (1) is located at the position, close to the right, of the cavity (91), the power management board (2) is located at the position, close to the left, of the cavity (91), a switch hole (92), an input socket hole (93) and an output socket hole (94) are formed in the surface of one side of the shell (9), the switch hole (92) is a through hole, the two-way switch (3) is inlaid in the switch hole (92), and the switch side of the two-way switch (3) faces the outer side of the device; the input socket hole (93) is a through hole, and the socket side of the input socket (7) faces the outer side of the device; the output socket hole (94) is a through hole, and the socket side of the output socket (5) faces the outer side of the device.

9. The power-safe direct-current power supply device according to claim 8, wherein: the outer side of the two-way switch (3) is connected with a switch waterproof cover (33), the switch waterproof cover (33) is provided with a protruding cover (34), and the protruding cover (34) is hinged with one side of the switch waterproof cover (33); the outer side of the input socket (7) is connected with a socket waterproof cover (13), and the outer side of the output socket (5) is connected with the socket waterproof cover (13); the socket waterproof covers (13) are identical in structure, the socket waterproof covers (13) are provided with fixing rings (111), the fixing rings (111) are sleeved on the input socket (7) or the output socket (5), the fixing rings (111) are connected with a top cover (113) through fixing strips (112), and the top cover (113) is sleeved outside the fixing rings (111).

10. The power-safe direct-current power supply device according to claim 9, wherein: shell fixing holes (95) are formed in the periphery of the top of the shell (9), the shell fixing holes (95) are counter bores which are open in one direction and face the upper side of the shell (9), and fixing screws (96) are inserted into the shell fixing holes (95);

the upper cover (10) is provided with a cover fixing hole (101) corresponding to the shell fixing hole (95), the cover fixing hole (101) is a through hole, and the fixing screw (96) penetrates through the cover fixing hole (101) and the shell fixing hole (95).