CN211127295U - UPS lithium battery integrated power supply system - Google Patents
UPS lithium battery integrated power supply system Download PDFInfo
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- CN211127295U CN211127295U CN201922455756.6U CN201922455756U CN211127295U CN 211127295 U CN211127295 U CN 211127295U CN 201922455756 U CN201922455756 U CN 201922455756U CN 211127295 U CN211127295 U CN 211127295U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a UPS lithium cell integration electrical power generating system, including lithium cell group, battery management system BMS module and UPS module, lithium cell group and battery management system BMS module circuit connection, the UPS module includes UPS-MCU controller, charger, wave filter and rectifier, the wave filter includes inductance L1 and inductance L2, the rectifier includes MOS pipe K2, MOS pipe K3, MOS pipe K4, MOS pipe K5, diode D4, diode D5, electric capacity C1 and electric capacity C2, MOS pipe K2, K3, K4, K5 and thyristor V1, V2, V3 pass through UPS-MCU controller control, UPS-MCU controller can communicate with between the battery management system BMS module.
Description
Technical Field
The utility model relates to a power technical field, concretely relates to UPS lithium cell integration electrical power generating system.
Background
In the industries of banks, hospitals, military, power systems and the like, sudden power failure of some key devices causes significant loss, so that it is important to ensure reliable and stable power supply of the key devices. Currently, the combination of an Uninterruptible Power Supply (UPS) and a lithium battery provides guarantee for these key devices; when a commercial power is connected, the UPS supplies the voltage-stabilized commercial power to a load for use and can charge the lithium battery pack at the same time; when the commercial power is interrupted (power failure in accident), the UPS can continuously supply 220V alternating current to the load by the direct current power supply of the lithium battery through the method of switching and converting the inverter, so that the load can keep normal work and the software and hardware of the load are protected from being damaged.
At present, the UPS that matches with lithium cell group is most independent equipment, lithium cell group and UPS equipment belong to different producers respectively, when user or integrator need purchase, need purchase lithium cell group and UPS equipment from different producers and come back supporting equipment, consequently there is the lithium cell very easily and does not match with the UPS power, the communication is incompatible, the hardware interface is inconsistent, the tactics do not match the scheduling problem, need the personnel that professional know lithium cell or UPS to come the equipment complex, be difficult to let the simple and convenient use complete sets of equipment of user.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a UPS lithium cell integration electrical power generating system has solved among the prior art UPS equipment and the inconsistent, the unmatched problem of strategy of lithium cell group communication.
The technical scheme of the utility model is realized like this:
a UPS lithium battery integrated power supply system comprises a lithium battery pack, a battery management system BMS module and a UPS module, wherein the lithium battery pack is connected with the battery management system BMS module through a circuit, the UPS module comprises a UPS-MCU controller, a charger, a filter and a rectifier, the filter comprises an inductor 1 and an inductor 2, the rectifier comprises an MOS transistor K, a diode D, a capacitor C and a capacitor C, the input end of a mains supply is connected with the anode of a thyristor V and the cathode circuit of the thyristor V respectively, the cathode of the thyristor V is connected with the first end circuit of the inductor 1, the anode of the thyristor V is connected with the first end circuit of the inductor 2, the second end of the inductor 1, the anode of the diode D and the drain of the MOS transistor K are collected at a node A, the second end of the inductor 2, the cathode of the diode D and the source of the MOS transistor K are collected at a node B, the cathode of the MOS transistor K and the drain of the MOS transistor K are collected at a node C, the anode of the diode K, the capacitor K is connected with a load output end of the charger, the charger is connected with the charger, the charger is connected with the charger.
Preferably, the battery management system BMS module includes a BMS controller, a pre-charging relay S1, a total positive relay S2, a charging relay S3, a wake-up key K1, a DC internal relay S4, a DC external relay S5, a discharging diode D1, a freewheeling diode D2 and a freewheeling diode D3, a negative electrode of the discharging diode D1, a positive electrode of the freewheeling diode D3 and one end of the charging relay S3 are converged to a node a, and the node a is connected with a positive output terminal P + circuit of the charger; the other end of the charging relay S3 and the anode of the discharging diode D1 are collected at a node b, and the node b is in circuit connection with the first end of the main positive relay S2; the second end of the total positive relay S2 and the positive electrode of the fly-wheel diode D2 are gathered at a node c, and the node c is connected with a positive circuit of the lithium battery pack after being connected with the Hall sensor in series; two ends of the main positive relay S2 are connected in parallel with a pre-charging branch; the negative electrode of the freewheeling diode D2, the first end of the awakening key K1 and the first end of the DC inner relay S4 are gathered at a node D, the second end of the awakening key K1, the second end of the DC inner relay S4 and the first end of the DC outer relay S5 are gathered at a node e, the node e is in circuit connection with the first end of the switching power supply, and the second end of the switching power supply and the negative electrode of the lithium battery pack are in circuit connection with the negative electrode output end P-of the charger; a second end of the DC outer relay S5 is connected with the negative circuit of the freewheeling diode D3; the main positive relay S2, the charging relay S3, the DC inner relay S4 and the DC outer relay S5 are controlled by a BMS controller, and the UPS-MCU controller is in communication connection with the BMS controller.
Preferably, the pre-charging branch comprises a pre-charging relay S1 and a pre-charging resistor R1, and the pre-charging relay S1 and the pre-charging resistor R1 are connected in series and then are respectively connected with the node b and the node c in a circuit.
Preferably, a null switch S6 is electrically connected between the node e and the switching power supply.
Preferably, the two ends of the lithium battery pack are respectively connected with a fuse.
Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses organize the lithium cell, the UPS module, battery management system BMS module is integrated as an organic whole, design through the circuit structure to UPS and the circuit structure of battery management system BMS module, make the lithium cell group match with UPS module power, make lithium cell group information real-time and UPS-MCU controller mutual, UPS equipment and lithium cell group communication are incompatible among the prior art, the hardware interface is inconsistent, the unmatched problem of tactics, let the control strategy to the lithium cell group more effective, the product is used more safely, it is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic plan view of an embodiment of a UPS lithium battery integrated power supply system according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment of the invention provides a UPS lithium battery integrated power supply system, which comprises a lithium battery pack, a battery management system BMS module and a UPS module, wherein the lithium battery pack is connected with the battery management system BMS module in a circuit, the UPS module comprises a UPS-MCU controller, a charger, a filter and a rectifier, the filter comprises an inductor 1 and an inductor 2, the rectifier comprises an MOS tube K, a diode D, a capacitor C and a capacitor C, the input end of a mains supply is respectively connected with the anode of a thyristor V and the cathode of the thyristor V in a circuit, the cathode of the thyristor V is connected with the first end of the inductor 1 in a circuit, the anode of the thyristor V is connected with the first end of the inductor 2 in a circuit, the second end of the inductor 1, the anode of the diode D and the drain of the MOS tube K are collected at a node A, the second end of the inductor D, the cathode of the diode D and the source of the MOS tube K are collected at a node B, the cathode of the inductor D and the MOS tube K are collected at a node C, the cathode of the thyristor D, the thyristor K, the MOS tube K is collected at a cathode of the node A, the capacitor K, the cathode of the thyristor K is connected with the inductor K, the capacitor K is connected with the capacitor K, the capacitor K is connected with the capacitor K, the capacitor K.
Specifically, the battery management system BMS module includes a BMS controller, a pre-charging relay S1, a main positive relay S2, a charging relay S3, a wake-up key K1, a DC internal relay S4, a DC external relay S5, a discharging diode D1, a freewheeling diode D2 and a freewheeling diode D3, a negative electrode of the discharging diode D1, a positive electrode of the freewheeling diode D3 and one end of the charging relay S3 are converged at a node a, and the node a is connected with a positive output terminal P + circuit of the charger; the other end of the charging relay S3 and the anode of the discharging diode D1 are collected at a node b, and the node b is in circuit connection with the first end of the main positive relay S2; the second end of the total positive relay S2 and the positive electrode of the fly-wheel diode D2 are gathered at a node c, and the node c is connected with a positive circuit of the lithium battery pack after being connected with the Hall sensor in series; two ends of the main positive relay S2 are connected in parallel with a pre-charging branch; the negative electrode of the freewheeling diode D2, the first end of the awakening key K1 and the first end of the DC inner relay S4 are gathered at a node D, the second end of the awakening key K1, the second end of the DC inner relay S4 and the first end of the DC outer relay S5 are gathered at a node e, the node e is in circuit connection with the first end of the switching power supply, and the second end of the switching power supply and the negative electrode of the lithium battery pack are in circuit connection with the negative electrode output end P-of the charger; a second end of the DC outer relay S5 is connected with the negative circuit of the freewheeling diode D3; the main positive relay S2, the charging relay S3, the DC inner relay S4 and the DC outer relay S5 are controlled by a BMS controller, and the UPS-MCU controller is in communication connection with the BMS controller.
The pre-charging branch comprises a pre-charging relay S1 and a pre-charging resistor R1, and the pre-charging relay S1 and the pre-charging resistor R1 are connected in series and then are respectively connected with a node b and a node c in a circuit mode.
When the utility model is used, when the commercial power meets the load work, the UPS-MCU controller only supplies power through the commercial power by closing the charging path of the lithium battery pack; when the commercial power does not meet the load work, the UPS-MCU controller realizes that the lithium battery pack and the commercial power supply simultaneously supply power to the load through control; when the commercial power is interrupted, if the power is cut off in an accident, the UPS-MCU controller starts a charging path of the lithium battery pack and only supplies power through the lithium battery pack. The utility model discloses for the incessant in-process that provides electric power of load, the state of BMS real time monitoring lithium cell to with the state information feedback such as the voltage of the lithium cell that acquires, electric current, temperature, the trouble condition to UPS-MCU controller, when the electric quantity of monitoring the lithium cell is not enough, UPS-MCU controller control commercial power is the power supply of lithium cell group, and the UPS-MCU controller is according to the charge of state information control lithium cell group such as voltage, electric current, temperature, the trouble condition, discharge power.
The utility model discloses when UPS lithium cell integration electrical power generating system uninterruptedly provides the power supply at the load, maintenance switch K7 is in the off-state all the time, only when UPS lithium cell integration electrical power generating system breaks down, just manually opens maintenance switch K7, lets the commercial power flow through static switch K8, for the load power supply, is in under the normal operating condition all the time guaranteeing the load, maintains UPS lithium cell integration electrical power generating system, the troubleshooting.
When the UPS lithium battery integrated power supply system is in a normal state, the control process specifically comprises the following steps:
(1) when the load is powered by only commercial power, the UPS-MCU controller closes the thyristor V1 and opens the thyristors V2 and V3 to make the thyristor V1 not conducted, and the thyristors V2 and V3 conducted to stop the lithium battery pack from supplying power to the load, and controls the MOS tube K2, the MOS tube K3, the MOS tube K4 and the MOS tube K5 to output alternating current to supply power to the load, wherein the current flows in the direction from a commercial power input live wire → the thyristor V2 → the inductor L1 → the diode D4 → the MOS tube K4 → the inductor L → the commercial power output live wire → a zero wire → the capacitor C1 and the capacitor C6324 intermediate point, a capacitor C1 and a capacitor C2 intermediate point → a commercial power output live wire → the inductor 9 → the MOS tube K5 → the diode D5 → the inductor L → 2 → V3 → the commercial power input live wire, and outputs the alternating current through the UPS-MCU controller.
(2) When no commercial power is input, the UPS-MCU controller opens the thyristor V1, closes the thyristors V2 and V3, enables the thyristor V1 to be conducted, the thyristors V2 and V3 to be not conducted, the lithium battery pack sequentially flows through the thyristor V1 and the inductor L1 from the node a (or the P + output end of the charger), and then direct current is converted into alternating current to supply power to a load after being rectified by a rectifier formed by the MOS transistor K2, the MOS transistor K3, the MOS transistor K4, the MOS transistor K5, the diode D4, the diode D5, the capacitor C1 and the capacitor C2.
(3) When the commercial power and the lithium battery supply power to the load at the same time, the UPS-MCU controller opens the thyristors V1, V2 and V3 to conduct the thyristors V1, V2 and V3, so that the commercial power and the lithium battery pack supply power to the load at the same time.
And when the UPS-MCU controller detects that the voltage or the current output to the load is overlarge, the UPS-MCU controller closes the thyristor V1 to cut off the power supply of the lithium battery pack, so that the power supply is supplied to the load only through the commercial power, and the load is prevented from being damaged due to overcurrent or overvoltage.
When the UPS-MCU controller detects that the voltage required by the load is too high and exceeds the load of a rectifier consisting of an MOS tube K2, an MOS tube K3, an MOS tube K4, an MOS tube K5, a diode D4, a diode D5, a capacitor C1 and a capacitor C2, the UPS-MCU controller closes a thyristor V2 and a thyristor 3 and simultaneously opens a bypass switch K6 and an electrostatic switch K8, so that the mains supply runs through the branch to supply power to the load.
(4) The utility model discloses for the incessant in-process that provides electric power of load, the electric quantity condition of real time monitoring lithium cell group simultaneously, when the electric quantity of lithium cell group is not enough, thyristor V1 is closed to the UPS-MCU controller, makes thyristor V1 not switch on, and the commercial power charges to lithium cell group through the charger.
The utility model monitors the state information of the lithium battery pack in real time through the BMS module of the battery management system in the process of providing a circuit for the load without interruption, and feeds the state information back to the UPS-MCU; when the temperature appears too high, excessive pressure, undervoltage or when overflowing in the lithium cell group, battery management system BMS module can charge, discharge protection to the lithium cell group, and concrete control process is:
(a) in the initial state of a battery management system BMS module, a pre-charging relay S1, a main positive relay S2, a charging relay S3, a DC inner relay S4 and an idle switch S6 are in an open state, and a DC outer relay S5 is a normally closed relay and is in a closed state;
(b) battery management system BMS module self-checking:
when the battery management system is manually started, the DC internal relay S4 is closed, then the wake-up switch S4 is manually pressed, the switching power supply works to provide 12V power for the BMS controller, and the BMS module of the battery management system enters self-detection; if the self-checking of the BMS module of the battery management system is unsuccessful, fault information is sent to a BMS controller, if the self-checking is successful, pre-charging is carried out, namely a charging relay S3 is closed, a pre-charging relay S1 is closed, the external total voltage (namely the voltage charged by a charger) and the internal total voltage (the voltage of a lithium battery pack) are detected, when the external total voltage is 90% of the internal total voltage, a total relay S is closed by 2, and a pre-charging relay S1 is disconnected;
when charging is started, mains supply is input through the charger to provide a power supply for the switching power supply, the mains supply enters the switching power supply from the positive electrode output end P + and the negative electrode output end P-of the charger respectively to provide a 12V power supply for the BMS module of the battery management system, and the BMS module of the battery management system enters self-checking; if the self-checking of the BMS module of the battery management system is unsuccessful, fault information is sent to the BMS controller, if the self-checking is successful, pre-charging is carried out, namely the charging relay S3 is closed, the pre-charging relay S1 is closed, the external total voltage (namely the voltage charged by the charger) and the internal total voltage (the voltage of the lithium battery pack) are detected, when the external total voltage is 90% of the internal total voltage, the total relay S is closed by 2, and the pre-charging relay S1 is disconnected.
The battery management system BMS module performs a self-test, that is, detects whether each device in the battery management system BMS module malfunctions.
(c) When the BMS module of the battery management system is in a normal working state, the BMS controller collects state information such as voltage, temperature, total pressure and current of the lithium battery pack through the collection interface and transmits the information with the UPS-MCU controller in real time through the communication line, and the UPS-MCU controller carries out charging and discharging according to load and mains supply state and adjusts charging and discharging power of the battery in real time.
(d) When the commercial power is used for charging the lithium battery pack, the commercial power is input through the charger, and the lithium battery pack is charged from the positive output end P + and the negative output end P-of the charger respectively, and the current direction is as follows: commercial power input → charger → P +, P-output terminal → positive and negative poles of lithium battery pack.
In the charging process of the lithium battery pack, when fault conditions such as overlarge current, overhigh temperature, overhigh voltage and the like occur, the BMS controller disconnects the DC inner relay S5 and the charging relay S3 and cuts off a charging loop until preset conditions are recovered (for example, after one minute is delayed or the current value, the voltage value and the temperature value are reduced to be below preset values), and then closes the DC inner relay S5 and the discharging relay S3.
(e) When the lithium battery pack provides power supply for a load, the current direction is that the lithium battery pack anode → the charger P + P-output terminal → the thyristor V1 → the inductor L1 → the diode D4 → the MOS tube K4 → the inductor L3 → the commercial power output → the zero line → the commercial power output → the inductor L3 → the MOS tube K5 → the diode D5 → the inductor L2 → the battery cathode, and the direct current output by the lithium battery pack is converted into the alternating current by the rectifier formed by the MOS tube K2, the MOS tube K3, the MOS tube K4, the MOS tube K5, the diode D4, the diode D5, the capacitor C1 and the capacitor C2 to supply power to the load.
In the charging process of the lithium battery pack, when fault conditions such as overlarge current, overhigh temperature, overhigh voltage and the like occur, the BMS controller disconnects the main positive relay S2 and cuts off a discharging loop until preset conditions are recovered (for example, after one minute is delayed or the current value, the voltage value and the temperature value are reduced to be below preset values), and then closes the main positive relay S2.
The circuit between the node e and the switching power supply is connected with an idle switch S6, and the idle switch S6 is manually turned on when the lithium battery needs to be started to charge or discharge.
Furthermore, the two ends of the lithium battery pack are respectively connected with the fuse, so that when the battery pack is short-circuited, the fuse can be fused in a short time to break a loop, and the protection effect is achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A UPS lithium battery integrated power supply system is characterized by comprising a lithium battery pack, a battery management system BMS module and a UPS module, wherein the lithium battery pack is connected with the battery management system BMS module through a circuit, the UPS module comprises a UPS-MCU controller, a charger, a filter and a rectifier, the filter comprises an inductor 1 and an inductor 2, the rectifier comprises an MOS transistor K, a diode D, a capacitor C and a capacitor C, the input end of a mains supply is connected with the anode of a thyristor V and the cathode circuit of the thyristor V respectively, the cathode of the thyristor V is connected with the first end of the inductor 1 through a circuit, the anode of the thyristor V is connected with the first end of the inductor 2 through a circuit, the second end of the inductor 1, the anode of the diode D and the drain of the MOS transistor K are collected at a node A, the second end of the inductor 2, the cathode of the diode D and the source of the MOS transistor K are collected at a node B, the cathode of the MOS transistor D and the source of the MOS transistor K are collected at a node B, the cathode of the diode K and the MOS transistor K, the MOS transistor K and the anode of the MOS transistor K are collected at a node C, the output end of a charger, the charger is connected with the charger, the anode of the charger, the charger is connected with the anode of the charger, the charger is connected with the charger, the charger is connected with the charger, the charger is connected with the charger, the charger.
2. The UPS lithium battery integrated power supply system of claim 1, wherein the battery management system BMS module comprises a BMS controller, a pre-charging relay S1, a total positive relay S2, a charging relay S3, a wake-up key K1, a DC internal relay S4, a DC external relay S5, a discharging diode D1, a freewheeling diode D2 and a freewheeling diode D3, wherein the cathode of the discharging diode D1, the anode of the freewheeling diode D3 and one end of the charging relay S3 are converged at a node a, and the node a is connected with the positive output end P + circuit of the charger; the other end of the charging relay S3 and the anode of the discharging diode D1 are collected at a node b, and the node b is in circuit connection with the first end of the main positive relay S2; the second end of the total positive relay S2 and the positive electrode of the fly-wheel diode D2 are gathered at a node c, and the node c is connected with a positive circuit of the lithium battery pack after being connected with the Hall sensor in series; two ends of the main positive relay S2 are connected in parallel with a pre-charging branch; the negative electrode of the freewheeling diode D2, the first end of the awakening key K1 and the first end of the DC inner relay S4 are gathered at a node D, the second end of the awakening key K1, the second end of the DC inner relay S4 and the first end of the DC outer relay S5 are gathered at a node e, the node e is in circuit connection with the first end of the switching power supply, and the second end of the switching power supply and the negative electrode of the lithium battery pack are respectively in circuit connection with the negative electrode output end P-of the charger; a second end of the DC outer relay S5 is connected with the negative circuit of the freewheeling diode D3; the main positive relay S2, the charging relay S3, the DC inner relay S4 and the DC outer relay S5 are controlled by a BMS controller, and the UPS-MCU controller is in communication connection with the BMS controller.
3. The UPS lithium battery integrated power supply system of claim 2, wherein the pre-charging branch comprises a pre-charging relay S1 and a pre-charging resistor R1, and the pre-charging relay S1 and the pre-charging resistor R1 are connected in series and then are respectively connected with the node b and the node c in a circuit.
4. The UPS lithium battery integrated power supply system of claim 2, wherein a null switch S6 is electrically connected between the node e and the switching power supply.
5. The UPS-lithium battery integrated power supply system according to claim 2, wherein fuses are connected to both ends of the lithium battery pack.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110994781A (en) * | 2019-12-28 | 2020-04-10 | 广州宝狮新能源有限公司 | UPS lithium battery integrated power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994781A (en) * | 2019-12-28 | 2020-04-10 | 广州宝狮新能源有限公司 | UPS lithium battery integrated power supply system |
| CN110994781B (en) * | 2019-12-28 | 2024-05-03 | 广州宝狮新能源有限公司 | UPS lithium battery integrated power supply system |
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