CN113937859A - Charging and discharging switching device and method for energy storage high-voltage box - Google Patents
Charging and discharging switching device and method for energy storage high-voltage box Download PDFInfo
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- CN113937859A CN113937859A CN202111232279.2A CN202111232279A CN113937859A CN 113937859 A CN113937859 A CN 113937859A CN 202111232279 A CN202111232279 A CN 202111232279A CN 113937859 A CN113937859 A CN 113937859A
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- relay
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- negative
- pcs
- auxiliary switching
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- 238000007599 discharging Methods 0.000 title claims abstract description 23
- 238000004146 energy storage Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a charging and discharging switching device and a charging and discharging switching method for an energy storage high-voltage box, wherein the device comprises an anode loop relay, a cathode loop relay, an auxiliary switching relay, a first diode, a second diode and a controller; a positive contact of the negative circuit relay is connected with the total negative electrode of the battery cluster, and a negative contact is connected with the negative electrode of the PCS; the negative contact of the positive circuit relay is connected with the positive electrode of the PCS, the positive contact is connected with the positive contact of the auxiliary switching relay, and the negative contact of the auxiliary switching relay is connected with the total positive electrode of the battery cluster; the positive electrode of the first diode is connected with the total positive electrode of the battery cluster, and the negative electrode of the first diode is connected with the positive contact of the auxiliary switching relay; and the anode of the second diode is connected with the anode of the PCS, and the cathode of the second diode is connected with the positive contact of the auxiliary switching relay. According to the invention, the charging and discharging switching of the energy storage high-voltage box is realized by assisting the switching on and off of the switching relay and utilizing the one-way conduction performance of the two diodes of the hardware circuit.
Description
Technical Field
The invention relates to the technical field of energy storage high-voltage boxes, in particular to a charging and discharging switching device and a charging and discharging switching method for an energy storage high-voltage box.
Background
For the existing Power grid side energy storage System, the energy storage high-voltage box is the total voltage of all PACKs connected in series on the whole battery cluster, and the controller in the high-voltage box controls the switch of the relay so as to complete the linkage of the battery cluster and a Power Conversion System (PCS) and complete the charging and discharging of the battery cluster.
However, for a system in which the main contact of the direct-current high-voltage relay has polarity, the charging and discharging of the battery can cause the polarity of circuits connected at two ends of the main contact of the relay to change along with the charging and discharging of the battery, and the main contact of the relay is simply connected into the circuit directly like the conventional method, so that the service life of the relay is shortened, and potential hazards are brought to the safety of the energy storage high-voltage box.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a charging and discharging switching device and a charging and discharging switching method for an energy storage high-voltage box.
The technical scheme adopted by the invention for realizing the purpose is as follows: a charge-discharge switching device and charge-discharge switching for an energy storage high-voltage box comprise an anode loop relay, a cathode loop relay, an auxiliary switching relay, a first diode, a second diode and a controller; the positive contact of the negative loop relay is connected with the total negative electrode of the battery cluster, and the negative contact is connected with the negative electrode of the PCS; the negative contact of the positive circuit relay is connected with the positive electrode of the PCS, the positive contact is connected with the positive contact of the auxiliary switching relay, and the negative contact of the auxiliary switching relay is connected with the total positive electrode of the battery cluster; the anode of the first diode is connected with the total anode of the battery cluster, and the cathode of the first diode is connected with the positive contact of the auxiliary switching relay; the anode of the second diode is connected with the anode of the PCS, and the cathode of the second diode is connected with the positive contact of the auxiliary switching relay; and the control signals output by the controller are respectively connected with the control ends of the positive circuit relay, the negative circuit relay and the auxiliary switching relay and are used for performing on-off control on the positive circuit relay, the negative circuit relay and the auxiliary switching relay so as to perform charge and discharge control on the battery cluster and the PCS.
And when the controller controls the PCS to charge the battery cluster, the controller controls the positive circuit relay to be disconnected, the negative circuit relay to be closed and the auxiliary switching relay to be closed.
When the battery cluster is controlled to discharge to the PCS, the positive pole loop relay is controlled to be closed, the negative pole loop relay is controlled to be closed, and the auxiliary switching relay is controlled to be opened.
The positive circuit relay, the negative circuit relay and the auxiliary switching relay.
The technical scheme adopted by the invention also comprises the following steps: a charging and discharging switching method for an energy storage high-voltage box comprises the following steps:
the controller receives a charge and discharge control signal and controls the switches of the positive pole loop relay, the negative pole loop relay and the auxiliary switching relay according to the charge and discharge control signal;
when the charge-discharge control signal is the PCS to charge the battery cluster, the anode of the PCS is connected with the total anode of the battery cluster through a second diode and an auxiliary switching relay in sequence;
when the charge and discharge control signal is used for discharging the battery cluster to the PCS, the total positive electrode of the battery cluster is connected with the positive electrode of the PCS through the first diode and the positive electrode loop relay.
The switch for controlling the positive circuit relay, the negative circuit relay and the auxiliary switching relay according to the charge and discharge control signal specifically comprises the following steps:
when the charge and discharge control signal is PCS to charge the battery cluster, the positive pole loop relay is controlled to be disconnected, the negative pole loop relay is controlled to be closed, and the auxiliary switching relay is controlled to be closed;
and when the charge and discharge control signal is used for discharging the PCS by the battery cluster, controlling the positive pole loop relay to be closed, controlling the negative pole loop relay to be closed and controlling the auxiliary switching relay to be opened.
The invention has the following advantages and beneficial effects:
1. according to the invention, the charging and discharging switching of the energy storage high-voltage box is realized by the on-off of the auxiliary switching relay KM2 and the anode loop relay KM1 and the one-way conduction performance of two diodes of a hardware circuit;
2. the invention ensures that the polarity of the circuit connected with the contacts with positive and negative polarities of the main contact of the relay is the same as that of the contacts no matter under the condition that the battery cluster is charged or discharged, prolongs the service life of the relay and improves the safety of the energy storage high-voltage box.
Drawings
Fig. 1 is a structural view of a charge-discharge switching device according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, on the basis of a relay (positive pole loop relay KM1, negative pole loop relay KM3) of a conventional battery cluster total positive pole circuit and a conventional battery cluster total negative pole circuit, an auxiliary switching relay KM2 and two diodes (a first diode and a second diode) are added to the battery cluster total positive pole circuit, and the specific structure is as follows:
the device comprises an anode loop relay KM1, a cathode loop relay KM3, an auxiliary switching relay KM2, a first diode, a second diode and a controller; the positive contact of the negative loop relay KM3 is connected with the total negative electrode of the battery cluster, and the negative contact is connected with the negative electrode of the PCS; the negative contact of the positive circuit relay KM1 is connected with the positive electrode of the PCS, the positive contact is connected with the positive contact of the auxiliary switching relay KM2, and the negative contact of the auxiliary switching relay KM2 is connected with the total positive electrode of the battery cluster; the positive electrode of the first diode is connected with the total positive electrode of the battery cluster, and the negative electrode of the first diode is connected with the positive contact of the auxiliary switching relay KM 2; the anode of the second diode is connected with the anode of the PCS, and the cathode of the second diode is connected with the positive contact of the auxiliary switching relay KM 2; the control signals output by the controller are respectively connected with the control ends of the positive circuit relay KM1, the negative circuit relay KM3 and the auxiliary switching relay KM2, and are used for performing on-off control on the positive circuit relay KM1, the negative circuit relay KM3 and the auxiliary switching relay KM2 so as to perform charging and discharging control on the battery cluster and the PCS. When the controller controls the PCS to charge the battery cluster, the positive pole loop relay KM1 is switched off, the negative pole loop relay KM3 is switched on, and the auxiliary switching relay KM2 is switched on. When the battery cluster is controlled to discharge to the PCS, the positive pole loop relay KM1 is controlled to be closed, the negative pole loop relay KM3 is controlled to be closed, and the auxiliary switching relay KM2 is controlled to be opened. The positive circuit relay KM1, the negative circuit relay KM3 and the auxiliary switching relay KM2 are arranged in the circuit.
A charging and discharging switching method for an energy storage high-voltage box comprises the following steps:
when the PCS charges the battery cluster:
the method comprises the following steps: the controller controls the positive circuit relay KM1 to be disconnected, the auxiliary switching relay KM2 to be closed and the negative circuit relay KM3 to be closed, and as shown in FIG. 1, the PCS is connected with the total negative electrode of the battery cluster through the closed negative circuit relay KM 3;
step two: the current of PCS + passes through a second diode from the junction 3 to the junction 2 to the junction 1, then to the positive contact + A1 of the auxiliary switching relay KM2, and is connected to the negative contact-A2 through the closed KM2 to the total positive pole of the battery cluster;
when the battery discharges the PCS:
the method comprises the following steps: the controller controls the positive circuit relay KM1 to be closed, the auxiliary switching relay KM2 to be opened and the negative circuit relay KM3 to be closed, and as shown in FIG. 1, the PCS is connected with the total negative electrode of the battery cluster through the closed negative circuit relay KM 3;
step two: the current of the total positive pole of the battery cluster passes through the junction 2 to 1 of the first diode, and since the auxiliary switching relay KM2 is open, the current continues to be connected from the positive contact + a1 of the closed positive circuit relay KM1 to the negative contact-a 2 to PCS +;
so operate, through the break-make of auxiliary switching relay KM2 and positive pole return relay KM1 and the one-way conduction performance of two diodes that utilize hardware circuit, realize the charge-discharge switching of energy storage high-voltage box, guaranteed simultaneously that the contact of the positive and negative polarity of the main contact of relay is no matter under the circumstances that the battery cluster charges or discharges, the polarity of the circuit that it connects all is the same with the polarity of contact, has prolonged the life-span of relay, has improved the security of energy storage high-voltage box.
Claims (6)
1. A charge-discharge switching device for an energy storage high-voltage box comprises an anode loop relay and a cathode loop relay, and is characterized by further comprising an auxiliary switching relay, a first diode, a second diode and a controller; the positive contact of the negative loop relay is connected with the total negative electrode of the battery cluster, and the negative contact is connected with the negative electrode of the PCS; the negative contact of the positive circuit relay is connected with the positive electrode of the PCS, the positive contact is connected with the positive contact of the auxiliary switching relay, and the negative contact of the auxiliary switching relay is connected with the total positive electrode of the battery cluster; the anode of the first diode is connected with the total anode of the battery cluster, and the cathode of the first diode is connected with the positive contact of the auxiliary switching relay; the anode of the second diode is connected with the anode of the PCS, and the cathode of the second diode is connected with the positive contact of the auxiliary switching relay; and the control signals output by the controller are respectively connected with the control ends of the positive circuit relay, the negative circuit relay and the auxiliary switching relay and are used for performing on-off control on the positive circuit relay, the negative circuit relay and the auxiliary switching relay so as to perform charge and discharge control on the battery cluster and the PCS.
2. The charging and discharging switching device for the energy storage high voltage box as claimed in claim 1, wherein the controller controls the positive pole loop relay to be open, the negative pole loop relay to be closed and the auxiliary switching relay to be closed when the PCS is controlled to charge the battery pack.
3. The charging and discharging switching device for the energy storage high voltage box as claimed in claim 1, wherein when the battery cluster is controlled to discharge electricity to the PCS, the positive pole loop relay is controlled to be closed, the negative pole loop relay is controlled to be closed, and the auxiliary switching relay is controlled to be opened.
4. The charging and discharging switching device for the energy storage high-voltage box is characterized in that the positive circuit relay, the negative circuit relay and the auxiliary switching relay are arranged in the circuit box.
5. A charge-discharge switching method for a high-pressure tank for storing energy according to claim 1, characterized by comprising the following steps:
the controller receives a charge and discharge control signal and controls the switches of the positive pole loop relay, the negative pole loop relay and the auxiliary switching relay according to the charge and discharge control signal;
when the charge-discharge control signal is the PCS to charge the battery cluster, the anode of the PCS is connected with the total anode of the battery cluster through a second diode and an auxiliary switching relay in sequence;
when the charge and discharge control signal is used for discharging the battery cluster to the PCS, the total positive electrode of the battery cluster is connected with the positive electrode of the PCS through the first diode and the positive electrode loop relay.
6. The charge-discharge switching method for the energy storage high-voltage box according to claim 5, wherein the controlling of the switches of the positive circuit relay, the negative circuit relay and the auxiliary switching relay according to the charge-discharge control signal comprises:
when the charge and discharge control signal is PCS to charge the battery cluster, the positive pole loop relay is controlled to be disconnected, the negative pole loop relay is controlled to be closed, and the auxiliary switching relay is controlled to be closed;
and when the charge and discharge control signal is used for discharging the PCS by the battery cluster, controlling the positive pole loop relay to be closed, controlling the negative pole loop relay to be closed and controlling the auxiliary switching relay to be opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232279.2A CN113937859A (en) | 2021-10-22 | 2021-10-22 | Charging and discharging switching device and method for energy storage high-voltage box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232279.2A CN113937859A (en) | 2021-10-22 | 2021-10-22 | Charging and discharging switching device and method for energy storage high-voltage box |
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| Publication Number | Publication Date |
|---|---|
| CN113937859A true CN113937859A (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111232279.2A Pending CN113937859A (en) | 2021-10-22 | 2021-10-22 | Charging and discharging switching device and method for energy storage high-voltage box |
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| CN (1) | CN113937859A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254692A (en) * | 2023-11-13 | 2023-12-19 | 宁德时代新能源科技股份有限公司 | Control method, battery system, device, equipment and medium for DC/DC converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105656168A (en) * | 2016-03-24 | 2016-06-08 | 江苏峰谷源储能技术研究院有限公司 | Ceaseless zero loop current safe and quick switching battery pack |
| CN112165156A (en) * | 2020-09-23 | 2021-01-01 | 深圳市拓邦锂电池有限公司 | Charging/discharging device, battery system, charging/discharging control method, and storage medium |
| CN112968503A (en) * | 2021-04-01 | 2021-06-15 | 深圳市沈括科技创新有限公司 | Multi-cluster parallel energy storage system applied to high-voltage direct-current equipment |
| CN113193633A (en) * | 2021-06-04 | 2021-07-30 | 傲普(上海)新能源有限公司 | Battery cluster access method and device, energy storage power station, equipment and storage medium |
-
2021
- 2021-10-22 CN CN202111232279.2A patent/CN113937859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656168A (en) * | 2016-03-24 | 2016-06-08 | 江苏峰谷源储能技术研究院有限公司 | Ceaseless zero loop current safe and quick switching battery pack |
| CN112165156A (en) * | 2020-09-23 | 2021-01-01 | 深圳市拓邦锂电池有限公司 | Charging/discharging device, battery system, charging/discharging control method, and storage medium |
| CN112968503A (en) * | 2021-04-01 | 2021-06-15 | 深圳市沈括科技创新有限公司 | Multi-cluster parallel energy storage system applied to high-voltage direct-current equipment |
| CN113193633A (en) * | 2021-06-04 | 2021-07-30 | 傲普(上海)新能源有限公司 | Battery cluster access method and device, energy storage power station, equipment and storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254692A (en) * | 2023-11-13 | 2023-12-19 | 宁德时代新能源科技股份有限公司 | Control method, battery system, device, equipment and medium for DC/DC converter |
| CN117254692B (en) * | 2023-11-13 | 2024-03-22 | 宁德时代新能源科技股份有限公司 | Control method, battery system, device, equipment and medium for DC/DC converter |
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Application publication date: 20220114 |