CN211239354U - Main loop control circuit of energy storage equipment - Google Patents
Main loop control circuit of energy storage equipment Download PDFInfo
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- CN211239354U CN211239354U CN201921505129.2U CN201921505129U CN211239354U CN 211239354 U CN211239354 U CN 211239354U CN 201921505129 U CN201921505129 U CN 201921505129U CN 211239354 U CN211239354 U CN 211239354U
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Abstract
The utility model provides an energy storage equipment's major loop control circuit, charging circuit and discharge circuit, charging circuit's first end with battery wherein one end is connected to the first end in discharge circuit, charging circuit's second end with the corresponding one end of energy storage equipment is connected to the second end in discharge circuit, charging circuit's middle-end with the middle-end in discharge circuit is connected. The utility model discloses can be in with the detached while of charge-discharge circuit for continuous heavy current can not appear flowing through in charge-discharge circuit and the semiconductor device in the return circuit that discharges.
Description
Technical Field
The utility model relates to a battery management system field, in particular to energy storage equipment's major loop control circuit.
Background
The main loop control scheme of the traditional energy storage equipment is generally single-wire control, namely, a charging and discharging loop is not separately controlled, and when the charging loop is disconnected, discharging cannot be carried out, and when the discharging loop is disconnected, charging cannot be carried out. The internet data center has higher requirements on the energy storage equipment, and when the data center is powered off, the energy storage equipment must supply power to the equipment at any time. If the energy storage device main loop control device is disconnected at this time, the energy storage device cannot respond to the discharging request at any time, so that the whole data center loses power.
Another conventional main loop control scheme is shown in fig. 1, and includes a charging loop and a discharging loop, where the charging loop and the discharging loop are connected in parallel, the charging loop and the discharging loop are both a series circuit composed of a diode and a switch, and the diodes in the charging loop and the discharging loop are in opposite directions. When a battery is charged or discharged for a long time through a charging circuit or a discharging circuit, if a large current flows through a main circuit for a long time, a diode generates heat, and the diode is easily damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy storage equipment's major loop control circuit for solve the major loop that prior art exists and can not flow through the problem of heavy current for a long time.
In order to achieve the above object, the utility model provides a main loop control circuit of energy storage equipment, including charging circuit and discharge circuit, charging circuit's first end with battery wherein one end is connected to the first end in discharge circuit, charging circuit's second end with the corresponding one end of energy storage equipment is connected to the second end in discharge circuit, charging circuit's middle-end with the middle-end in discharge circuit is connected.
Optionally, the main loop control circuit further includes a pre-charging loop, a first end of the pre-charging loop is connected to one end of the battery, and a second end of the pre-charging loop is connected to a corresponding end of the energy storage circuit; before the battery charges the energy storage device or the energy storage device discharges the battery, the battery pre-charges the energy storage device through the pre-charging loop.
Optionally, the discharge loop includes a first diode and a discharge contactor, the positive electrode of the first diode is connected to the positive electrode of the battery, the negative electrode of the first diode is connected to the first end of the discharge contactor, the second end of the discharge contactor is connected to the high potential end of the energy storage device, and the common end of the first diode and the discharge contactor is the middle end of the discharge loop.
Optionally, the charging loop comprises a charging contactor, the charging contactor is connected with the first diode in parallel, and a common end of the charging contactor and a negative electrode of the first diode is a middle end of the charging loop.
Optionally, the charging circuit further includes a second diode, a cathode of the second diode is connected to the middle end of the charging circuit, and an anode of the second diode is connected to the high potential end of the energy storage device.
Optionally, the pre-charging circuit includes a pre-charging contactor and a first resistor, and the pre-charging contactor is connected in series with the first resistor.
Optionally, before the battery charges the energy storage device or the energy storage device discharges the battery, the pre-charging contactor is turned on, when a difference between the voltage of the battery and the voltage on the energy storage device reaches a first threshold, the battery charges the energy storage device or the energy storage device discharges the battery, the pre-charging contactor is turned off, and pre-charging is completed.
Optionally, when the main circuit control circuit, the battery and the energy storage device have no fault, or when the main circuit does not need charging protection or discharging protection, the charging contactor and the discharging contactor are conducted.
Optionally, when the discharge amount of the battery to the energy storage device reaches a second threshold, the discharge contactor is turned off to perform discharge protection; and when the voltage of the battery reaches a third threshold value, or when the charging time of the energy storage device to the battery reaches a fourth threshold value, the discharging contactor is conducted again.
Optionally, when the charge amount of the energy storage device to the battery reaches a fifth threshold, the charging contact is disconnected, and charging protection is performed; and when the voltage of the battery reaches the sixth threshold value, or when the discharging time of the battery to the energy storage device is detected to reach the seventh threshold value, the charging contact is turned on again.
Compared with the prior art, the utility model has the advantages of it is following: the first end of the charging loop and the first end of the discharging loop are connected with one end of a battery, the second end of the charging loop and the second end of the discharging loop are connected with the corresponding end of the energy storage device, and the middle end of the charging loop is connected with the middle end of the discharging loop. The utility model discloses can be with the detached while of charge-discharge circuit for continuous heavy current can not appear in the semiconductor device.
Drawings
FIG. 1 is a schematic diagram of a prior art charging circuit and discharging circuit;
fig. 2 is a schematic diagram of a main loop control circuit of the energy storage device of the present invention;
fig. 3 is a schematic diagram of another charging circuit and discharging circuit of the present invention;
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are simplified and in non-precise proportion, so as to facilitate and clearly assist in explaining the embodiments of the present invention.
As shown in fig. 2, the schematic diagram of the main circuit control circuit of the energy storage device of the present invention is illustrated, including a charging circuit, a discharging circuit, a pre-charging circuit and a control module, the discharging circuit includes a discharging contactor KM1 and a first diode D1, the charging circuit includes a charging contactor KM2 and a second diode D2, and the pre-charging circuit includes a pre-charging contactor KM3 and a resistor R1. The positive electrode of the first diode D1 is connected with the positive electrode of the battery, the negative electrode of the first diode D1 is connected with the first end of a discharge contactor KM1, the second end of the discharge contactor KM1 is connected with the high-potential end of the energy storage device, and the common end of the first diode D1 and the discharge contactor KM1 is the middle end M of the discharge loop. The charging contactor KM2 is connected in parallel with the first diode D1, and the second diode D2 is connected in parallel with the discharging contactor KM 1. The control module detects the states of the battery voltage, the voltage of the energy storage equipment, the main loop current, the charging contactor, the discharging contactor and the pre-charging contactor and controls the on-off of the charging contactor KM2, the discharging contactor KM1 and the pre-charging contactor KM 3. When the entire charge and discharge system had no failure and charge and discharge protection, discharge contactor KM1 and charge contactor KM2 remained closed. When the discharging contactor KM1 or the charging contactor KM2 is closed, the energy storage device is precharged firstly, namely the precharging contactor KM3 is closed firstly; when the difference between the voltage of the battery and the voltage on the energy storage device reaches a first threshold value, the battery charges the energy storage device or the energy storage device discharges the battery, that is, the discharging contactor KM1 or the charging contactor KM2 is closed, the pre-charging contactor KM3 is opened, and pre-charging is completed. When the discharge amount of the battery to the energy storage device reaches a second threshold value, the discharge contactor KM1 is switched off to perform discharge protection; when the voltage of the battery reaches the third threshold value, or when the charging time of the energy storage device to the battery reaches the fourth threshold value is detected, the discharging contactor KM1 is closed again. When the charging amount of the energy storage device to the battery reaches a fifth threshold value, the charging contactor KM2 is disconnected for charging protection; when the voltage of the battery reaches the sixth threshold value, or when it is detected that the discharge time of the battery to the energy storage device reaches the seventh threshold value, charging contact KM3 is turned on again. If a charging current can be detected when the charging contactor KM2 is opened, or if a discharging current can be detected when the discharging contactor KM1 is opened, it indicates that a diode in the charging circuit or the discharging circuit is broken down, and the energy storage device is controlled not to be enabled. When the control module has a fault (including a temperature sampling fault, a voltage sampling fault, a battery voltage monitoring fault, a storage fault or an intranet communication fault and the like), the charging contactor KM2 and the discharging contactor KM1 are cut off. The control authority is that the fault of the control module is highest, the charging and discharging current is abnormal, and the charging and discharging protection is lowest. The communication protocol can be supplemented according to energy storage equipment with different signals. The switch QF on the main loop in the figure is a manual load break switch for connecting or disconnecting the connection between the battery and the power supply device.
As shown in fig. 3, another schematic diagram of a charging circuit and a discharging circuit of the present invention is illustrated, the discharging circuit includes a diode D1 and a discharging contactor KM1, and the charging circuit includes a charging contactor KM 2. The diode D1 and the charging contact KM2 are connected in parallel, the anode of the diode is connected with the anode of the battery, the first end of the discharging contact KM1 is connected with the cathode of the diode and the common end of the charging contact KM2, and the second end of the discharging contact KM1 is connected with the high-potential end of the energy storage device. When the battery needs to discharge to the energy storage equipment, the discharging contactor KM1 is closed for a short time; when the energy storage device needs to charge the battery for a short time, the charging contactor KM2 is closed for a short time (the discharging contactor KM1 is closed originally). When charging or discharging for a long time is required, the discharging contactor KM1 and the charging contactor KM2 are closed, and the current flows in the loop of the discharging contactor KM1 and the charging contactor KM2, so that a large current does not flow through the semiconductor devices KM1 and KM2 for a long time.
Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. A main loop control circuit for an energy storage device, comprising:
the charging circuit comprises a charging circuit and a discharging circuit, wherein the first end of the charging circuit and the first end of the discharging circuit are connected with one end of a battery, the second end of the charging circuit and the second end of the discharging circuit are connected with the corresponding end of the energy storage device, and the middle end of the charging circuit is connected with the middle end of the discharging circuit.
2. The main loop control circuit of an energy storage device of claim 1, wherein: the main loop control circuit further comprises a pre-charging loop, wherein a first end of the pre-charging loop is connected with one end of the battery, and a second end of the pre-charging loop is connected with one end of the energy storage circuit corresponding to the energy storage circuit; before the battery charges the energy storage device or the energy storage device discharges the battery, the battery pre-charges the energy storage device through the pre-charging loop.
3. The main loop control circuit of the energy storage device of claim 2, wherein: the discharging circuit comprises a first diode and a discharging contactor, the anode of the first diode is connected with the anode of the battery, the cathode of the first diode is connected with the first end of the discharging contactor, the second end of the discharging contactor is connected with the high potential end of the energy storage device, and the common end of the first diode and the discharging contactor is the middle end of the discharging circuit.
4. The main loop control circuit of the energy storage device of claim 3, wherein: the charging loop comprises a charging contactor, the charging contactor is connected with the first diode in parallel, and the common end of the charging contactor and the negative electrode of the first diode is the middle end of the charging loop.
5. The main loop control circuit of the energy storage device of claim 4, wherein: the charging circuit further comprises a second diode, the cathode of the second diode is connected with the middle end of the charging circuit, and the anode of the second diode is connected with the high-potential end of the energy storage device.
6. The main loop control circuit of the energy storage device according to claim 4 or 5, characterized in that: the pre-charging loop comprises a pre-charging contactor and a first resistor, and the pre-charging contactor is connected with the first resistor in series.
7. The main loop control circuit of the energy storage device of claim 6, wherein: before the battery charges the energy storage equipment or the energy storage equipment discharges the battery, the pre-charging contactor is switched on, when the difference value between the voltage of the battery and the voltage on the energy storage equipment reaches a first threshold value, the battery charges the energy storage equipment or the energy storage equipment discharges the battery, the pre-charging contactor is switched off, and pre-charging is completed.
8. The main loop control circuit of the energy storage device according to claim 4 or 5, characterized in that: when the main loop control circuit, the battery and the energy storage equipment have no faults, or when the main loop does not need charging protection or discharging protection, the charging contactor and the discharging contactor are conducted.
9. The main loop control circuit of the energy storage device of claim 5, wherein: when the discharge amount of the battery to the energy storage equipment reaches a second threshold value, the discharge contactor is disconnected for discharge protection; and when the voltage of the battery reaches a third threshold value, or when the charging time of the energy storage device to the battery reaches a fourth threshold value, the discharging contactor is conducted again.
10. The main loop control circuit of the energy storage device of claim 9, wherein: when the charging amount of the energy storage equipment to the battery reaches a fifth threshold value, the charging contact is disconnected, and charging protection is carried out; and when the voltage of the battery reaches the sixth threshold value, or when the discharging time of the battery to the energy storage device is detected to reach the seventh threshold value, the charging contact is turned on again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921505129.2U CN211239354U (en) | 2019-09-11 | 2019-09-11 | Main loop control circuit of energy storage equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921505129.2U CN211239354U (en) | 2019-09-11 | 2019-09-11 | Main loop control circuit of energy storage equipment |
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| CN211239354U true CN211239354U (en) | 2020-08-11 |
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| CN201921505129.2U Active CN211239354U (en) | 2019-09-11 | 2019-09-11 | Main loop control circuit of energy storage equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535208A (en) * | 2019-09-11 | 2019-12-03 | 杭州协能科技股份有限公司 | The major loop control circuit of energy storage device |
| CN115833324A (en) * | 2022-12-26 | 2023-03-21 | 中国铁塔股份有限公司 | Charge-discharge control circuit and electronic equipment |
-
2019
- 2019-09-11 CN CN201921505129.2U patent/CN211239354U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535208A (en) * | 2019-09-11 | 2019-12-03 | 杭州协能科技股份有限公司 | The major loop control circuit of energy storage device |
| CN115833324A (en) * | 2022-12-26 | 2023-03-21 | 中国铁塔股份有限公司 | Charge-discharge control circuit and electronic equipment |
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