CN216959376U

CN216959376U - Energy storage BMS high pressure device

Info

Publication number: CN216959376U
Application number: CN202220001371.1U
Authority: CN
Inventors: 曾庆前
Original assignee: Guangdong Didu New Energy Co ltd
Current assignee: Guangdong Didu New Energy Co ltd
Priority date: 2022-01-03
Filing date: 2022-01-03
Publication date: 2022-07-12
Anticipated expiration: 2032-01-03

Abstract

The utility model relates to the technical field of energy storage, and particularly discloses an energy storage BMS high-voltage device which comprises a power supply input circuit, a main positive circuit and an output load circuit, wherein the main positive circuit is electrically connected with the power supply input circuit and the output load circuit respectively, the main positive circuit comprises a charging circuit, a discharging circuit and a pre-charging circuit, the charging circuit is electrically connected with the discharging circuit and the pre-charging circuit respectively, and the discharging circuit is electrically connected with the pre-charging circuit. The charging loop can keep charging when the discharging protection is carried out, the discharging loop can keep discharging when the charging protection is carried out, the problem that the battery cannot be recovered in time after the battery is protected is solved, automatic continuous charging and discharging can be realized, and unattended normal use can be realized under the condition that the battery cannot be recovered in time after the battery is protected.

Description

Energy storage BMS high pressure device

Technical Field

The utility model relates to the technical field of energy storage, in particular to an energy storage BMS high-voltage device.

Background

The BMS battery system is commonly called a battery caregiver or a battery manager, and is mainly used for intelligently managing and maintaining each battery unit, preventing overcharge and overdischarge of the battery, prolonging the service life of the battery, and monitoring the state of the battery. The existing energy storage BMS high-voltage box basically adopts different-port control, the charging and discharging loops are separately controlled, relays are connected in series in the charging and discharging loops for protection control, and the disconnection and connection of each electric loop are timely and accurately controlled according to needs by monitoring the states of voltage, current, temperature and the like of a battery pack. In practical application, the inverter or the UPS equipment needs to be connected with the same port, so that the battery cannot be continuously discharged after charge protection before recovery, and cannot be continuously charged after discharge protection before recovery.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide an energy storage BMS high-voltage device, aiming at the defects of the prior art, wherein a charging loop can keep charging during discharging protection, and a discharging loop can keep discharging during charging protection, so that the problem that the battery cannot be timely recovered after being protected is solved, automatic and continuous charging and discharging can be realized, and unattended normal use can be realized under the condition that the battery cannot be timely recovered after being protected.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides an energy storage BMS high voltage device, includes power input circuit, main positive return circuit and output load circuit, main positive return circuit respectively with power input circuit and output load circuit electric connection, main positive return circuit includes charge circuit, discharge circuit and pre-charge return circuit, charge circuit respectively with discharge circuit and pre-charge return circuit electric connection, discharge circuit with pre-charge return circuit electric connection.

Preferably, the charging circuit comprises a charging diode D1 and a charging relay K1, the discharging circuit comprises a discharging diode D2 and a discharging relay K2, the anode of the discharging diode D2 is connected with one end of the charging relay K1, the cathode of the discharging diode D2, the cathode of the charging diode D1 and one end of the discharging relay K2 are connected with the other end of the charging relay K1, and the anode of the charging diode D1 is connected with the other end of the discharging relay K2.

Preferably, the pre-charging circuit includes a pre-charging resistor R1 and a pre-charging relay K3, one end of the pre-charging resistor R1 is connected to one end of the charging relay K1, the other end of the pre-charging resistor R1 is connected to one end of the pre-charging relay K3, and the other end of the pre-charging relay K3 is connected to the other end of the discharging relay K2.

Preferably, the power input circuit comprises a battery anode input end B + and a battery cathode input end B-, and the battery anode input end B + is connected with one end of the charging relay.

Preferably, the output load circuit comprises a load output end P + and a load output end P-, the battery negative electrode input end is connected with the load output end P-through a fuse F1, and the load output end P + is connected with the other end of the discharge relay K2.

By adopting the technical scheme, the energy storage BMS high-voltage device provided by the utility model has the following beneficial effects: the main positive circuit in the energy storage BMS high-voltage device is respectively electrically connected with a power supply input circuit and an output load circuit, and the charging circuit, the discharging circuit and the pre-charging circuit are respectively electrically connected with the discharging circuit and the pre-charging circuit; when the charging protection is carried out, the charging relay in the charging loop is cut off, the discharging loop can discharge, the external load can normally output power, automatic continuous charging and discharging can be realized, and under the condition that the battery cannot be recovered in time after the battery is protected, the unattended normal use can be realized.

Drawings

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

in the figure, 1 is a power input circuit, 2 is a main positive loop and 3 is an output load circuit.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1, in the circuit schematic diagram of the present invention, the energy storage BMS high voltage device includes a power input circuit 1, a main positive circuit 2 and an output load circuit 3, the main positive circuit 2 is electrically connected to the power input circuit 1 and the output load circuit 3, respectively, the main positive circuit 2 includes a charging circuit, a discharging circuit and a pre-charging circuit, the charging circuit is electrically connected to the discharging circuit and the pre-charging circuit, respectively, and the discharging circuit is electrically connected to the pre-charging circuit. It will be appreciated that the power input circuit is for accessing a battery pack and the output load circuit 3 is for accessing an external load.

Specifically, the charging circuit comprises a charging diode D1 and a charging relay K1, the discharging circuit comprises a discharging diode D2 and a discharging relay K2, the anode of the discharging diode D2 is connected with one end of the charging relay K1, the cathode of the discharging diode D2, the cathode of the charging diode D1 and one end of the discharging relay K2 are all connected with the other end of the charging relay K1, and the anode of the charging diode D1 is connected with the other end of the discharging relay K2; the pre-charging loop comprises a pre-charging resistor R1 and a pre-charging relay K3, one end of the pre-charging resistor R1 is connected with one end of the charging relay K1, the other end of the pre-charging resistor R1 is connected with one end of the pre-charging relay K3, and the other end of the pre-charging relay K3 is connected with the other end of the discharging relay K2; the power input circuit comprises a battery anode input end B + and a battery cathode input end B-, and the battery anode input end B + is connected with one end of the charging relay; the output load circuit comprises a load output end P + and a load output end P-, the battery cathode input end is connected with the load output end P-through a fuse F1, and the load output end P + is connected with the other end of the discharging relay K2. It can be understood that the energy storage BMS high voltage device realizes continuous charging and discharging by using a rectifier bridge in parallel to a charging and discharging relay, a main positive circuit is connected in series to two relays, a charging relay K1 is close to a battery side, a discharging relay K2 is close to a load side, a pre-charging circuit, namely a pre-charging resistor R1 and a pre-charging relay K3 are connected to both sides of the two relays, a common point is in the middle of the charging and discharging relays, and rectifier bridge diodes (namely a charging diode D1 and a discharging diode D2) are connected. The overcurrent capacity of the energy storage BMS high-voltage device is selected according to the actual load requirement, a BMS control strategy is combined, a discharging relay K2 is cut off during discharging protection, a charging loop keeps chargeable through a charging diode D1, and the battery can be charged by the output voltage of an external charger; when the charging protection is carried out, the charging relay K1 cuts off the protection, the discharging loop can discharge through the discharging diode D2, and the external load can normally output power.

It can be understood that the utility model has reasonable design and unique structure, in the practical application process, 1, the input power circuit can be connected with a set of battery packs, the example application is 192V260AH battery packs, the power input circuit 1, the main positive loop 2 and the output load circuit 3 are integrated on the mainboard in the high-voltage box, the voltage and the temperature of the batteries in each battery box are received, the battery states such as current and the like are collected, and each relay of the high-voltage box is controlled; 2. the energy storage BMS high-voltage device can be applied to a 15KW photovoltaic inverter and is used for charging and discharging a battery; 3. after this energy storage BMS high pressure device was full of the protection, it was normal to reprint the discharge, directly opened after the protection of emptying normally that charges, realized automatic continuous charge and discharge, under the circumstances that can not in time resume after the protection appears in the battery, can realize unmanned on duty normal use.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. An energy storage BMS high-voltage device which characterized in that: the power supply comprises a power supply input circuit, a main positive loop and an output load circuit, wherein the main positive loop is electrically connected with the power supply input circuit and the output load circuit respectively, the main positive loop comprises a charging loop, a discharging loop and a pre-charging loop, the charging loop is electrically connected with the discharging loop and the pre-charging loop respectively, and the discharging loop is electrically connected with the pre-charging loop.

2. The energy storage BMS high voltage device of claim 1, characterized in that: the charging circuit includes charging diode D1 and charging relay K1, the discharging circuit includes discharging diode D2 and discharging relay K2, discharging diode D2's positive pole with charging relay K1's one end is connected, discharging diode D2's negative pole, charging diode D1's negative pole and discharging relay K2's one end all with charging relay K1's the other end is connected, charging diode D1's positive pole is connected with discharging relay K2's the other end.

3. The energy storage BMS high voltage device of claim 2, characterized in that: the pre-charging loop comprises a pre-charging resistor R1 and a pre-charging relay K3, one end of a pre-charging resistor R1 is connected with one end of a charging relay K1, the other end of a pre-charging resistor R1 is connected with one end of a pre-charging relay K3, and the other end of the pre-charging relay K3 is connected with the other end of a discharging relay K2.

4. The energy storage BMS high voltage device according to claim 3, characterized in that: the power input circuit comprises a battery anode input end B + and a battery cathode input end B-, and the battery anode input end B + is connected with one end of the charging relay.

5. The energy storage BMS high voltage device of claim 4, wherein: the output load circuit comprises a load output end P + and a load output end P-, the battery cathode input end is connected with the load output end P-through a fuse F1, and the load output end P + is connected with the other end of the discharging relay K2.