CN221126897U - Multi-mode direct current power supply system suitable for intelligent control - Google Patents
Multi-mode direct current power supply system suitable for intelligent control Download PDFInfo
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- CN221126897U CN221126897U CN202322664336.5U CN202322664336U CN221126897U CN 221126897 U CN221126897 U CN 221126897U CN 202322664336 U CN202322664336 U CN 202322664336U CN 221126897 U CN221126897 U CN 221126897U
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- 238000004146 energy storage Methods 0.000 description 4
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- 230000002159 abnormal effect Effects 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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Abstract
The utility model relates to a multimode direct current power supply system suitable for intelligent control, which comprises a direct current bus, a power supply branch and a battery pack, wherein the power supply side of the power supply branch is connected with the direct current bus. The utility model can switch various load power supply modes under the control of the matched control device, is beneficial to reducing the DC/DC working time, reducing the DC/DC temperature rise and prolonging the service life, and can be controlled by utilizing the existing intelligent control device.
Description
Technical Field
The utility model relates to a multimode direct current power supply system suitable for intelligent control.
Background
Referring to fig. 1, a conventional dc power supply system is generally provided with a dc bus from which a load (or a load circuit, for example, a consumer or an electrical system) connected to the dc bus obtains electric power. In order to ensure that the load can still work under abnormal conditions such as power failure of the direct current bus, a battery pack can be used as a standby power supply, the battery pack is connected into a connecting circuit (cable) between the direct current bus and the load through a direct current power conversion (boosting) circuit (or a direct current/DC circuit, which can be simply called DC/DC), energy is stored through the direct current bus in a charging mode, power is supplied to the load when necessary, and the output voltage can be regulated through DC/DC conversion under the control of a corresponding control system according to the actual condition of the battery pack, so that the output voltage meets the power consumption requirement of the load, and the connection of the battery pack (DC/DC) can be disconnected through a switch when necessary. For example, chinese patent document CN209389776U discloses an industrial driving uninterruptible power supply device including a voltage difference control electronic switch, which includes a charging module, a battery energy storage module, at least one group of dc power supply circuits, a voltage difference control electronic switch, a frequency converter circuit and a central controller; the input end of the charging module is connected with the mains supply, the output end of the charging module is respectively connected with the input end of the direct current power supply circuit and the battery energy storage circuit, the output end of the direct current power supply circuit is connected with the input end of the differential pressure control electronic switch, the output end of the differential pressure control electronic switch is connected with the frequency converter, the charging module, the battery energy storage module, the direct current power supply circuit, the differential pressure control electronic switch and the frequency converter circuit are all connected with the central controller, and the power supply device can be quickly switched on and off according to the voltage value of the direct current bus of the frequency converter, so that equipment dragged by the frequency converter is not stopped and torque is not fluctuated under the condition of voltage sag/short-time interruption of an industrial site. However, such a power supply circuit is simple in construction and convenient to control, but in a state where power is supplied from the battery pack, the DC/DC circuit needs to be continuously operated, thereby increasing power consumption, and the DC/DC circuit is high in temperature and short in service life.
Disclosure of utility model
The utility model aims to provide a multi-mode direct current power supply system provided with an energy storage battery pack and suitable for intelligent control, and the power supply system can switch the discharging modes of the battery pack under external control so as to reduce the DC/DC working time, reduce the DC/DC temperature rise and prolong the service life.
The technical scheme of the utility model is as follows: the utility model provides a multimode direct current power supply system suitable for intelligent control, including direct current busbar, power supply branch road and group battery, the power supply side of power supply branch road inserts the direct current busbar, the group battery is equipped with group battery branch road and group battery branch road that discharges, direct current busbar or the busbar side of its corresponding power supply branch road is connected to group battery branch road that charges, the other end inserts the group battery, the group battery is connected to group battery branch road's that discharges one end, the load side of its corresponding power supply branch road or insert its corresponding load are connected to the other end, be equipped with DC/DC circuit and through switch on the group battery branch road that discharges, the through switch is parallelly connected with DC/DC circuit.
The through switch should be an electrically controlled switch/electrically controlled switching device, e.g. a relay, a contactor, etc.
Further, a discharge diode is provided on the battery pack discharge branch, and the discharge diode is connected in series to the battery pack side of the DC/DC circuit.
The battery side of the pass switch may be connected between the discharge diode and the DC/DC circuit.
Further, a discharging switch is arranged on the discharging branch of the battery pack and is connected in series to the load side of the DC/DC circuit.
The load side of the pass switch may be connected between the DC/DC circuit and the discharge switch or may be connected to the load side of the discharge switch.
The number of the power supply branches can be multiple, and at least part of the power supply branches are provided with corresponding battery packs.
Further, a power supply switch may be disposed on the power supply branch, one end of the power supply switch is connected to a bus side of the power supply branch, and the other end is connected to a load side of the power supply branch.
Further, a power supply diode may be provided on the power supply branch, wherein an anode of the power supply diode is connected to a bus side of the power supply branch, and a cathode of the power supply diode is connected to a load side of the power supply branch.
Further, the power supply diode may be provided with a power supply diode bypass switch connected in parallel thereto, or may not be provided with a power supply diode bypass switch connected in parallel thereto.
The beneficial effects of the utility model are as follows: because the direct switch is connected in parallel on the DC/DC circuit, the direct switch and the control of the DC/DC circuit can be carried out through the matched control system, the direct switch is controlled to be closed under the condition that the output of the battery pack meets the requirement, the output of the battery pack is directly connected with a load through the direct switch, when the direct current bus is in power failure or insufficient in power supply, the battery pack supplies power to the load through the direct switch without DC/DC operation, when the voltage output of the battery pack is insufficient to meet the requirement of the load, the output of the battery pack is controlled to supply power to the load after the voltage is boosted by the DC/DC, and then the direct switch is disconnected, thereby avoiding unnecessary working time of the DC/DC, simultaneously enabling the battery to release more self electric quantity in a voltage range of the load, being beneficial to reducing loss and improving the working efficiency of the system.
The utility model can switch various load power supply modes under the control of the matched control device, can be used for supplying power to various direct current electric equipment/devices/systems, is suitable for intelligent control, and can be controlled by utilizing the intelligent control device of the current power supply system.
Drawings
FIG. 1 is a schematic diagram of a prior art power supply system in accordance with the present utility model;
FIG. 2 is a schematic diagram of one embodiment of the present utility model;
FIG. 3 is a schematic diagram of one embodiment of the present utility model;
FIG. 4 is a schematic diagram of one embodiment of the present utility model;
fig. 5 is a schematic diagram of an embodiment of the present utility model.
Detailed Description
Referring to fig. 2, 3, 4 and 5, such a power supply system includes a dc bus, a power supply branch (or bus power supply branch) for supplying power to a load, and a battery pack serving as a backup power source. The number of the power supply branches is set according to actual needs, and when a plurality of power supply branches are arranged, each power supply branch is used for supplying power to respective loads. The number of the battery packs is set according to actual needs and matched with a power supply branch circuit which needs a standby power supply so as to supply power to a load through the battery packs when the bus power supply is abnormal, and when the power supply branch circuit (the load of the power supply branch circuit) does not need to be provided with the standby power supply, the power supply branch circuit can not be provided with the battery packs. For the same power supply branch, when the battery packs are equipped, the number of the battery packs can be one (one group), or a plurality of (multiple groups) can be set if necessary, or the same battery pack is subjected to grouping management, and the states of different groupings in the battery packs are respectively controlled according to the needs. The battery pack may be provided with a charge and discharge management circuit (or battery management system, or BMS) to realize charge and discharge control.
One end (power supply side) of the power supply branch is connected to the direct current bus, and the other end (load side) of the power supply branch is connected to a load (for example, to a power supply terminal of the load). The battery pack is provided with a battery pack charging branch (short for charging branch) and a battery pack discharging branch (short for discharging branch) for supplying power to a load, one end (power supply side) of the battery pack charging branch is connected with a direct current bus (including direct connection with the direct current bus or connected to the bus side of the power supply branch, and the other end (load side) is connected with (connected to) the battery pack; one end (power supply side) of the battery pack discharging branch is connected with the battery pack, and the other end (load side) of the battery pack discharging branch is connected with a load (including direct connection or connection on the load side of the power supply branch, and connection between the power supply branch and the load is realized).
A first switch K1 (which may be referred to as a bus power switch, or a power switch) (see fig. 2 and 5) or a first diode D1 (which may be referred to as a bus power diode, or a power diode) (see fig. 3 and 4) may be provided/connected in series to the power branch, and the first switch K1 is used to control the on/off of the power branch. The two ends of the first switch K1 are respectively connected with power supply branches on two sides (a bus side and a load side) of the first switch K1, and the power supply branches are used for on-off control. The positive pole of the first diode D1 is connected to the power supply branch on the bus side, and the negative pole is connected to the power supply branch on the load side, so that the unidirectional current of the power supply branch is realized, and only the current from the bus to the load direction is allowed.
A fifth switch K5 (see fig. 4) may be disposed in parallel with the first diode D1, where the fifth switch K5 is used as a bypass switch of the first diode D1, and may be referred to as a power supply diode bypass switch, where the switch K5 is closed in a normal power supply state to reduce heat generated by the diode when the load is required to supply power, and where the switch K5 is opened when the bus does not have power supply capability, and where the switch D1 maintains unidirectional power supply conductivity of the branch, so that the first time after the bus resumes the power supply capability provides power to the load.
The connection node (or node) of the battery pack charging branch and the power supply branch is positioned at the power supply side of the first switch K1, so that the battery pack charging is not limited by the first switch K1. The connection node of the battery discharging branch and the power supply branch is located at the load side of the first switch K1, and when the battery is used for supplying power, the first switch K1 can be disconnected.
When the first diode D1 is disposed on the power supply branch, the connection node of the battery discharging branch and the power supply branch is located on the load side of the first diode D1, so as to avoid charging (reverse charging) to the bus.
When the first switch K1 is disposed on the power supply branch and the first diode D1 is not disposed, or in other suitable cases, the fourth diode D4 may be disposed on the bus side of the first switch K1 to define the unidirectional property (or referred to as the current unidirectional property) of the power supply branch, in which case the connection node of the battery charging branch and the power supply branch may be located on the negative side of the fourth diode D4 (see fig. 4), and the unidirectional property of the battery charging branch is achieved through the fourth diode D4.
A second diode D2 (which may be referred to as a charging diode) may be provided/connected in series with the battery charging branch for defining the unidirectional nature of the battery charging branch.
A second switch K2 (which may be referred to as a charging switch) may be provided/connected in series to the battery pack charging leg for controlling the on-off of the leg.
A third diode D3 may be arranged/connected in series on the battery discharge branch as a discharge diode for defining the unidirectional nature of the battery discharge branch, the third diode D3 being located on the battery side (input side) of the DC/DC circuit.
The third switch K3 serving as a discharge switch may be provided/connected in series on the discharge branch of the battery pack/on the load side of the DC/DC circuit, and used for controlling the on-off of the branch, and the third switch K3 may be located on the load side (output side) of the DC/DC circuit. The on-off control of the battery branch may be achieved by cooperation of an input side switch of the DC/DC circuit (for example, a built-in module) and a bypass switch of the DC/DC circuit (fourth switch K4), in which case the third switch K3 (see fig. 5) may not be provided.
The battery discharge branch is provided with a DC/DC circuit, the DC/DC circuit adopts a direct current booster circuit, and any suitable prior art, such as a commercially available DC/DC module/device, can be adopted. The DC/DC regulation can be performed according to the voltage output of the battery pack, so that the output voltage meets the load requirement. The battery side (input side) of the DC/DC circuit may be provided with/from an input side switch (or battery side switch, not depicted) which may be turned off when DC/DC operation is not required. For example, in the embodiment shown in fig. 5, when the DC/DC is not controllable switching capability, the DC/DC may be disabled using K3 off. When the power supply side of the DC/DC is at the battery pack side, K3 is arranged between the K4 and battery side connection point and the DC/DC; when the DC/DC working power supply is powered from the load side, K3 is arranged between the DC/DC and the load, and the DC/DC does not consume power at all under the condition; or D3 is directly arranged on the DC/DC and load side, so that the DC/DC is ensured not to be output, and the purpose of minimizing loss is realized.
When the DC/DC support control is turned off, the communication command can be used for controlling the working state of the DC/DC support control, and the output or the non-output is decided.
The discharge branch of the battery is provided with a fourth switch K4 serving as a pass-through switch, which is a bypass switch of the DC/DC circuit, through which the output of the battery can bypass the DC/DC circuit when closed, directly supplying power to the load, whereby the switch may also be referred to as a pass-through switch. The discharging mode of the battery pack can be switched (directly supplying power to the load or supplying power to the load after DC/DC boosting) by cooperative switching of the fourth switch K4 and the switch on the input side of the DC/DC circuit under the control of the matched control device/control system.
The battery side of the fourth switch K4 is connected between (on the battery discharge branch of) the third diode D3 (negative side) and the DC/DC circuit (input side) so that the unidirectional nature of the battery discharge branch (no matter what state the DC/DC circuit and the third switch K3 are in) is ensured by the third diode D3.
The load side of the fourth switch may be connected to the battery pack side of the third switch K3, or may be connected to the load side of the third switch K3 (including the load side of the power input terminal or the power supply branch directly connected to the load).
The current and voltage electric sensor or the signal/data collector can be arranged according to actual needs, the switch, the unidirectional diode and other electric components can be arranged according to actual needs, and corresponding control can be performed according to the prior art and other suitable technologies.
The components may be manufactured by conventional techniques and other suitable techniques. For example, each switch may employ a relay capable of electrical control.
The control of the battery pack, the DC/DC circuit and the switches can be achieved according to prior art.
The working parameters and specific forms of the electronic and electric elements/modules can be selected according to actual needs.
The preferred and optional technical means disclosed in the present utility model may be arbitrarily combined to form a plurality of different specific embodiments unless otherwise specified and when one preferred or optional technical means is further defined as another technical means.
Claims (10)
1. The utility model provides a multimode direct current power supply system suitable for intelligent control, including direct current bus, power supply branch road and group battery, the power supply side of power supply branch road inserts the direct current bus, its characterized in that group battery is equipped with group battery charging branch road and group battery discharging branch road, the one end of group battery charging branch road is connected the bus side of direct current bus or its power supply branch road that corresponds, the other end inserts the group battery, the group battery is connected to the one end of group battery discharging branch road, the load side of its corresponding power supply branch road or insert its corresponding load, be equipped with DC/DC circuit and through switch on the group battery discharging branch road, the through switch is parallelly connected with DC/DC circuit.
2. A multi-mode dc power supply system adapted for intelligent control as claimed in claim 1, characterized in that the through switch is an electrically controlled switch/switch device, e.g. a relay, a contactor.
3. The multi-mode direct current power supply system for intelligent control according to claim 1, wherein a discharge diode is provided on a discharge branch of the battery pack, and the discharge diode is connected in series to a battery pack side of the DC/DC circuit.
4. A multi-mode direct current power supply system adapted for intelligent control as claimed in claim 3, wherein the battery side of the pass switch is connected between the discharge diode and the DC/DC circuit.
5. The multi-mode direct current power supply system for intelligent control according to claim 1, wherein the discharge branch of the battery pack is provided with a discharge switch, and the discharge switch is connected in series to the load side of the DC/DC circuit.
6. The multi-mode direct current power supply system for intelligent control according to claim 5, wherein the load side of the pass switch is connected between the DC/DC circuit and the discharge switch or is connected to the load side of the discharge switch.
7. The multi-mode dc power supply system for intelligent control according to claim 1, wherein the number of power supply branches is plural, and at least some of the power supply branches are provided with battery packs corresponding thereto.
8. The multimode direct current power supply system suitable for intelligent control according to claim 1, wherein a power supply switch is arranged on the power supply branch, one end of the power supply switch is connected with a bus side of the power supply branch, and the other end of the power supply switch is connected with a load side of the power supply branch.
9. The multimode direct current power supply system suitable for intelligent control according to claim 1, wherein a power supply diode is arranged on the power supply branch, the anode of the power supply diode is connected with the bus side of the power supply branch, and the cathode of the power supply diode is connected with the load side of the power supply branch.
10. The multi-mode dc power supply system for intelligent control according to claim 9, wherein the power supply diode is provided with or without a power supply diode bypass switch connected in parallel therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664336.5U CN221126897U (en) | 2023-10-07 | 2023-10-07 | Multi-mode direct current power supply system suitable for intelligent control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664336.5U CN221126897U (en) | 2023-10-07 | 2023-10-07 | Multi-mode direct current power supply system suitable for intelligent control |
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| Publication Number | Publication Date |
|---|---|
| CN221126897U true CN221126897U (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322664336.5U Active CN221126897U (en) | 2023-10-07 | 2023-10-07 | Multi-mode direct current power supply system suitable for intelligent control |
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|---|---|
| CN (1) | CN221126897U (en) |
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2023
- 2023-10-07 CN CN202322664336.5U patent/CN221126897U/en active Active
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