CN218415903U

CN218415903U - Uninterrupted continuous power supply circuit capable of automatically converting load power supply

Info

Publication number: CN218415903U
Application number: CN202121702967.6U
Authority: CN
Inventors: 陶永连
Original assignee: Nanchang Bafang New Energy Vehicle Co ltd
Current assignee: Nanchang Bafang New Energy Vehicle Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2023-01-31
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses an uninterrupted continuous power supply circuit of automatic switching load power supply, including energy storage component and protected low pressure DC load, protected low pressure DC load passes through the wire and connects AC-DC converter, and AC-DC converter connects the external power supply, and energy storage component passes through the wire and connects protected low pressure DC load for energy storage component and AC-DC converter connect in parallel for protected low pressure DC load power supply, energy storage component includes energy storage battery and diode; the diode is connected into a power supply loop of the energy storage battery and the protected low-voltage direct-current load, so that the energy storage battery can only discharge outwards through the power supply loop and cannot be charged. The utility model discloses replaced the relay switching circuit mode among the prior art, after external power source cuts off the power supply suddenly, the energy storage subassembly can be supplied power to being protected low pressure direct current load immediately, and the circuit switching process does not have the interval, also does not have instantaneous outage state, can protect well being protected low pressure direct current load.

Description

Uninterrupted continuous power supply circuit capable of automatically converting load power supply

Technical Field

The utility model belongs to the technical field of the protection circuit, especially, relate to an automatic incessant power supply circuit that lasts of conversion load power supply.

Background

The power-off protection refers to a function of protecting processed data from being lost or damaged in case of sudden power-off of the electric appliance. The power failure reason of the power utilization system is composed of multiple factors, the consequence caused by power failure is immeasurable, and the power failure protection significance is great, so that the power failure protection method is an important protection means for ensuring the safety of power utilization equipment and the safety of families and enterprises. The power-off protection device is used as an important means for ensuring the safety of electric equipment, and is a protection device for carrying out safety protection on the electric equipment under the condition that the electric equipment is broken. The current widely used power-off protection device mostly adopts a relay to complete circuit switching at the power-off time, namely, when the power is cut off suddenly, the relay switches a circuit, so that a standby power supply is switched on to power utilization equipment, and the power is supplied to the power utilization equipment. However, in the process of switching the circuit of the relay, switching time is inevitably needed, the electric equipment is in an instantaneous power-off state within the switching time, certain damage risk is provided for high-precision equipment, and the electric equipment is easy to generate pulse when entering a power supply state from the power-off state, which may affect the service life of the equipment.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the prior art, the utility model provides an uninterrupted continuous power supply circuit of automatic switching load power supply, including energy storage component and protected low pressure direct current load, protected low pressure direct current load connects the ac-dc converter through the wire, the ac-dc converter connects the external power supply, energy storage component connects through the wire protected low pressure direct current load, make energy storage component and ac-dc converter connect in parallel each other for the power supply of protected low pressure direct current load, energy storage component includes energy storage battery and diode; the diode is connected into a power supply loop of the energy storage battery and the protected low-voltage direct-current load, so that the energy storage battery can only discharge outwards through the power supply loop and cannot be charged.

Furthermore, the energy storage assemblies are more than two groups, and the energy storage assemblies are connected in parallel to supply power for the protected low-voltage direct-current load.

Further, the energy storage battery is also connected with a charger.

Furthermore, the energy storage assembly also comprises a charger, the energy storage assembly is integrally provided with only two lead interfaces, and the lead interfaces are connected with the protected low-voltage direct-current load through a lead; two electric output ends of the charger are respectively connected with two poles of the energy storage battery, two electric input ends of the charger are respectively connected with two lead interfaces of the energy storage assembly, and the diode is arranged on a circuit between the electric input end and the electric output end of the charger.

Furthermore, all install electric quantity detection module on the energy storage battery in each energy storage subassembly, electric quantity detection module passes through the wire and connects the display for real-time detection each energy storage battery's electric quantity value and with electric quantity value transmission extremely the display shows.

According to the technical solution provided by the utility model, the utility model has the advantages that:

1. the utility model replaces the relay switching circuit mode in the prior art, when the external power supply is suddenly powered off, the energy storage component can immediately supply power to the protected low-voltage direct-current load, and the circuit switching process has no interval, namely, no instantaneous power-off state exists, so that the protected low-voltage direct-current load can be well protected;

2. a plurality of energy storage subassemblies use simultaneously, each other parallelly connected protects by protection low pressure direct current load power supply, make the protection effect more effective, when a certain energy storage battery damages or forgets when charging, also do not influence normal protection to low pressure direct current load, and in the protection process, when needing to change a certain energy storage battery (for example the product is updated and is updated, change old-fashioned lead acid battery into neotype lithium cell), direct dismantlement change can, also can not influence the protection to the load.

Drawings

FIG. 1 is a schematic diagram of the circuit structure of the present invention;

fig. 2 is an alternative of the circuit charger mounting method of the present invention.

Detailed Description

As shown in fig. 1, an uninterruptible continuous power supply circuit for automatically switching power supply of a load is used for protecting low-voltage direct-current electric equipment which needs long-time uninterruptible operation and cannot be powered off, and comprises an energy storage assembly 1 and a protected low-voltage direct-current load 2. The protected low-voltage direct-current load 2 is connected with an alternating-current to direct-current converter 3 through a lead, the alternating-current to direct-current converter 3 is connected with an external power supply for supplying power, universal 220V or 380V alternating current is converted into low-voltage direct current, and the low-voltage direct-current load 2 can work normally to use power. It is known that for various reasons, general ac power (i.e. power of power plant) is easy to be subjected to abnormal condition of power failure (commonly called power failure), and for some equipment (such as some precision electronic equipment) which needs to be continuously operated without power failure, a standby power supply must be added to ensure continuous power supply of the equipment. The current widely used power-off protection devices in the prior art mostly adopt relays to complete circuit switching at the power-off time. When power is suddenly cut off, the relay switches the circuit, so that the standby power supply is switched on the electric equipment to supply power to the electric equipment. However, in the process of switching the circuit of the relay, switching time is inevitably needed, the electric equipment is in an instantaneous power-off state within the switching time, certain damage risk is provided for high-precision equipment, and the electric equipment is easy to generate pulse when entering a power supply state from the power-off state, which may affect the service life of the equipment. For this reason, the utility model designs an energy storage component 1, energy storage component 1 passes through the wire and connects protected low pressure direct current load 2 for energy storage component 1 and alternating-current-to-direct-current converter 3 connect in parallel each other for being protected low pressure direct current load 2 power supplies. The energy storage assembly 1 comprises an energy storage battery 101 and a diode 102; the diode 102 is connected to the energy storage battery 101 and the power supply circuit of the protected low-voltage dc load 2, so that the energy storage battery can only discharge outwards through the power supply circuit and cannot be charged.

In the course of the work, when general alternating current is normal, by general alternating current through exchanging the conversion of direct current converter 3 back, for being protected low pressure direct current load 2 power supply, even energy storage battery 101 electric quantity is not enough this moment, because diode 102's effect, general alternating current also can not charge energy storage battery 101, has fully protected energy storage battery 101's safety. When the general alternating current is suddenly cut off, the energy storage battery 101 can immediately output electric energy to the protected low-voltage direct current load, so that the load can continuously work. The power supply circuit switching process is finished instantly without time interval, and an instant power-off state does not exist, so that the protected low-voltage direct-current load can be well protected. In order to facilitate replacement of the energy storage battery 101 and guarantee effectiveness of the protection circuit, the energy storage assemblies may be provided with more than two groups, three groups are taken as an example in fig. 1 for explanation, and the energy storage assemblies are connected in parallel to supply power to the protected low-voltage direct-current load. When one energy storage battery is damaged or forgets to charge, the energy storage batteries 101 in other energy storage assemblies can also output electric energy normally, so that the work of the protected low-voltage direct-current load 2 is maintained, and the normal protection of the low-voltage direct-current load is not influenced. Or in the protection process, when a certain energy storage battery needs to be replaced, for example, the product is updated, the old lead-acid storage battery is replaced by a novel lithium battery, and the old lead-acid storage battery can be directly detached and replaced, so that a certain energy storage battery can be detached, and the protection of the load cannot be influenced. Generally, the number of energy storage components is designed to be more than the actual demand. For example, a certain load is inspected once every 10 hours, the load consumes 100kw · h of electric energy in 10 hours, the total electric energy of each energy storage battery needs to be ensured to be larger than 100kw · h when the number of the energy storage assemblies is designed, and 12 groups of energy storage assemblies can be designed assuming that one energy storage battery contains 10kw · h of electric energy. Therefore, standby electric energy can be guaranteed to exist after a certain battery is accidentally damaged, and the load can be protected more fully. The energy storage battery may also be connected to a charger 4 so that the battery can be charged directly without removing the energy storage battery 101. Under the mode that external charger 4 was adopted to the tradition, if when adding the charger and integrate into a power supply cabinet in energy storage component 1, need four lead wire post interfaces, two are used for charging to charger 4, and two are used for connecing the low pressure direct current load of being protected, as shown in fig. 1. This kind of mode lead wire post is more, influences the use. Therefore, as an alternative preferred scheme, the energy storage assembly is integrally provided with only two lead interfaces 5, and the lead interfaces 5 are connected with the protected low-voltage direct-current load through wires, as shown in fig. 2. Two electrical output ends 7 of the charger 4 are respectively connected with two poles of the energy storage battery 101, two electrical input ends 6 of the charger 4 are respectively connected with two lead interfaces 5 of the energy storage assembly, and the diode 102 is arranged on a circuit between the electrical input end and the electrical output end of the charger. The energy storage assembly 1 can be charged and discharged through the two lead interfaces 5: during charging, the two lead interfaces 5 are connected with the line of the protected low-voltage direct-current load and are pulled out, the direct-current charging source is plugged in, the direct-current charging source charges the energy storage battery 101 through the two electric input ends of the charger 4 and the charger, and due to the effect of the diode 102, the direct-current charging source cannot directly charge the energy storage battery 101, so that the energy storage battery 101 is fully protected.

In addition, as a scheme that can supply the preferred, all install electric quantity detection module on the energy storage battery in each energy storage subassembly, electric quantity detection module passes through the wire and connects the display for real-time detection each energy storage battery's electric quantity value and with electric quantity value transmission extremely the display shows, and operating personnel can know each energy storage battery actual electric quantity and operating condition directly perceivedly according to the display result of display.

The technical solution provided by the present invention has been described in detail, and to the general technical personnel in the field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.

Claims

1. The uninterrupted continuous power supply circuit capable of automatically converting the power supply of the load is characterized by comprising an energy storage assembly and a protected low-voltage direct-current load, wherein the protected low-voltage direct-current load is connected with an alternating current-direct current converter through a wire, the alternating current-direct current converter is connected with an external power supply for supplying power, the energy storage assembly is connected with the protected low-voltage direct-current load through a wire, so that the energy storage assembly and the alternating current-direct current converter are mutually connected in parallel to supply power for the protected low-voltage direct-current load, and the energy storage assembly comprises an energy storage battery and a diode; the diode is connected into a power supply loop of the energy storage battery and the protected low-voltage direct-current load, so that the energy storage battery can only discharge outwards through the power supply loop and cannot be charged.

2. The uninterruptible power supply circuit for automatically switching power to a load as claimed in claim 1, wherein there are two or more sets of energy storage devices, and the energy storage devices are connected in parallel to supply power to the low voltage dc load to be protected.

3. The uninterruptible power supply circuit for automatically switching power to a load as claimed in claim 1, wherein a charger is further connected to the energy storage battery.

4. The uninterruptible continuous power supply circuit capable of automatically switching power supplies of loads is characterized in that the energy storage assembly further comprises a charger, the energy storage assembly is integrally provided with only two lead interfaces, and the lead interfaces are connected with the protected low-voltage direct-current loads through leads; two electric output ends of the charger are respectively connected with two poles of the energy storage battery, two electric input ends of the charger are respectively connected with two lead interfaces of the energy storage assembly, and the diode is arranged on a circuit between the electric input end and the electric output end of the charger.

5. The uninterruptible continuous power supply circuit capable of automatically converting load power supply of claim 1, wherein each energy storage battery in each energy storage assembly is provided with an electric quantity detection module, and the electric quantity detection module is connected with a display through a wire and is used for detecting the electric quantity value of each energy storage battery in real time and transmitting the electric quantity value to the display for display.