Battery dormancy management system applied to commercial vehicle parking lithium battery

Abstract

The utility model relates to a battery dormancy management system applied to a parking lithium battery of a commercial vehicle. Belongs to the technical field of commercial vehicle parking lithium batteries. The battery management system mainly solves the problem that the existing battery management system can only enter a low-power-consumption mode and cannot completely cut off power supply when a vehicle does not work for a long time. The device is mainly characterized by comprising a power supply relay, a power supply switch and a main relay, the input end of the power supply relay is electrically connected with a BMS power supply + pin, two output ends are electrically connected with the input end of the power supply switch and the positive electrode of the battery cell module respectively, the input control end is electrically connected with the shutdown driving pin, and the output end of the power supply switch is electrically connected with the positive electrode of the battery cell module; the main relay is connected in series to a positive electrode output line of the battery cell module, and an input control end of the main relay is electrically connected with a driving pin of the discharge relay; and the BMS power-pin is electrically connected with the negative electrode of the battery cell module. The lithium battery pack has the characteristic that a battery management system (BMS) can be completely powered off when the vehicle does not work for a long time, and is mainly used for the parking of the commercial vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial vehicle parking lithium batteries, and particularly relates to a battery sleep management system applied to commercial vehicle parking lithium batteries. Background Art

[0002] With the development of the current commercial vehicle market, in order to save costs, most drivers eat and live in the vehicle during long-distance freight transportation, correspondingly increasing the loads on the vehicle such as parking equipment like air conditioners and refrigerators, which increases the power consumption demand. In response to this situation, most lithium battery products have emerged in the current market. Since the product itself is a low-voltage 24V, the power supply of the battery management system in the lithium battery pack is directly powered by the battery cells, and the management system itself has power consumption. Currently, whether it is during battery inventory transfer or in the use of commercial vehicles, when encountering long holidays or some special situations that require long-term parking. The battery management system can only enter the low-power mode and cannot completely cut off the power supply, which undoubtedly increases the self-discharge amount of the battery pack. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a battery sleep management system for commercial vehicle parking lithium batteries that can be sleep-controlled. When the vehicle has not been working for a long time, the sleep management system can cut off its own power supply circuit and enter the shutdown state to achieve the purpose of reducing power consumption.

[0004] The technical solution of the utility model is: A battery sleep management system applied to commercial vehicle parking lithium batteries, including a BMS battery management system electrically connected to the battery cell module. The BMS battery management system includes a discharge relay drive pin, a BMS power + pin, a shutdown drive pin, and a BMS power - pin. The characteristics are: It also includes a power relay, a power switch, and a main relay; The input end of the power relay is electrically connected to the BMS power + pin, the two output ends are respectively electrically connected to the input end of the power switch and the positive electrode of the battery cell module, the input control end is electrically connected to the shutdown drive pin, the output control end is electrically connected to the negative electrode of the battery cell module, and the output end of the power switch is electrically connected to the positive electrode of the battery cell module; The main relay is connected in series on the positive output line of the battery cell module, the input control end of the main relay is electrically connected to the discharge relay drive pin, and the output control end is electrically connected to the negative electrode of the battery cell module; The BMS power - pin is electrically connected to the negative electrode of the battery cell module.

[0005] In the technical solution of the utility model, it also includes a shunt; The shunt is connected in series on the negative output line of the battery cell module.

[0006] In the technical solution of the utility model, the power relay is a single-pole double-throw relay.

[0007] In the technical solution of the present utility model, the single-pole double-throw relay includes an input contact terminal electrically connected to the + terminal of the BMS power supply, a first output contact terminal electrically connected to the input terminal of the power switch, a second output contact terminal electrically connected to the positive electrode of the battery cell module, and two single-pole double-throw relay coil terminals respectively electrically connected to the shutdown drive pin and the negative electrode of the battery cell module.

[0008] In the technical solution of the present utility model, the main relay is a discharge relay.

[0009] In the technical solution of the present utility model, the discharge relay includes two discharge relay coil terminals respectively electrically connected to the discharge relay drive pin and the negative electrode of the battery cell module.

[0010] In the technical solution of the present utility model, the power switch is a self-resetting manual switch.

[0011] In the technical solution of the present utility model, the shunt is electrically connected to the BMS battery management system.

[0012] The beneficial effect of the present utility model is that due to the adoption of a power relay, a power switch and a main relay, the input terminal of the power relay is electrically connected to the + terminal of the BMS power supply, the two output terminals are respectively electrically connected to the input terminal of the power switch and the positive electrode of the battery cell module, the input control terminal is electrically connected to the shutdown drive pin, the output control terminal is electrically connected to the negative electrode of the battery cell module, the output terminal of the power switch is electrically connected to the positive electrode of the battery cell module, the main relay is connected in series on the positive electrode output line of the battery cell module, the input control terminal of the main relay is electrically connected to the discharge relay drive pin, the output control terminal is electrically connected to the negative electrode of the battery cell module, and the - terminal of the BMS power supply is electrically connected to the negative electrode of the battery cell module. Therefore, it can supply power to itself through the power switch. When the vehicle has not been working for a long time, the BMS battery management system cuts off the power relay, and the self-power supply circuit is disconnected, so as to enter a complete shutdown state and achieve the purpose of reducing power consumption.

[0013] The present utility model has the characteristic that the BMS battery management system can completely cut off the power supply when the vehicle has not been working for a long time, and is mainly used for the lithium battery pack for commercial vehicle parking. Description of the Drawings

[0014] Figure 1 It is the circuit diagram of the embodiment of the present utility model. Detailed Embodiment

[0015] The following further describes the present utility model in conjunction with the embodiments.

[0016] As Figure 1As shown in the figure, an embodiment of a battery sleep management system for a commercial vehicle parking lithium battery of the present utility model includes a power relay K1, a power switch K2, a BMS battery management system, a shunt F, a main relay K3, and electrical connection components.

[0017] Among them, the BMS battery management system uses a BMS battery management system of model CM02-1C-02, which is a prior art. The BMS battery management system includes a discharge relay drive pin, a BMS power + pin, a shutdown drive pin, a BMS power - pin, and a shunt signal acquisition pin.

[0018] The battery cell module is a lithium battery pack for commercial vehicle parking. The battery cell module includes a positive output line, a battery pack positive electrode, a negative output line, and a battery pack negative electrode. The battery pack negative electrode is output to the outside for connecting an external load for power supply. The battery pack positive electrode is output to the outside for connecting an external load for power supply.

[0019] The power relay K1 is a single-pole double-throw relay, which is used for BMS power supply management, and its model is DRD-DC24V. The single-pole double-throw relay includes an input contact terminal 30, a first output contact terminal 88, a second output contact terminal 87, two single-pole double-throw relay coil terminals 85, 86. The input contact terminal 30 is electrically connected to the BMS power + pin, the first output contact terminal 88 is electrically connected to the input terminal of the power switch K2, the second output contact terminal 87 is electrically connected to the positive electrode of the battery cell module, one single-pole double-throw relay coil terminal 85 is electrically connected to the shutdown drive pin, and the other single-pole double-throw relay coil terminal 86 is electrically connected to the negative electrode of the battery cell module. The power switch K2 is a self-resetting manual switch, which is used as an external switch to wake up, and the output terminal of the power switch K2 is electrically connected to the positive electrode of the battery cell module.

[0020] The main relay K3 is a discharge relay, which is used as a power output switch for the battery pack, and its model is HFV22-200. It includes two discharge relay coil terminals that are respectively electrically connected to the discharge relay drive pin and the negative electrode of the battery cell module. The main relay K3 is connected in series on the positive output line of the battery cell module. The input control terminal of the main relay K3 is electrically connected to the discharge relay drive pin, and the output control terminal is electrically connected to the negative electrode of the battery cell module.

[0021] The BMS power - pin is electrically connected to the negative electrode of the battery cell module.

[0022] The shunt F is connected in series on the negative output line of the battery cell module, and the shunt F is electrically connected to the BMS battery management system. The shunt F is used to collect the battery pack current to calculate the power consumption.

[0023] During use: When the user turns on the machine and presses the power switch K2, the power supply passes through the first output contact terminal (pin 88) to supply the input contact terminal (pin 30), powering the BMS (Battery Management System). After the BMS is awakened, it drives the power relay K1 to connect the input contact terminal (pin 30) to the second output contact terminal (pin 87), enabling the BMS power supply to achieve self-sustained power supply. Then it drives the main relay K3 coil to close the main relay K3 to complete the external output. When the BMS uses the shunt resistor F for current sampling and calculates that the power reaches the designed protection threshold, the BMS first disconnects the main relay K3 to stop the external output and waits for the battery to charge. If the battery fails to be charged in time and the voltage continues to drop due to the self-power consumption of the BMS, when it reaches the set voltage protection threshold, the BMS disconnects the drive of the power relay K1, and the 30th pin of the power relay switches to the first output contact terminal (pin 88), disconnecting its own power supply to form a complete zero power consumption.

Claims

1. A battery sleep management system applied to a parking lithium battery of a commercial vehicle, comprising a BMS battery management system electrically connected to a battery cell module, the BMS battery management system including a discharge relay drive pin, a BMS power supply + pin, a shutdown drive pin, and a BMS power supply - pin, characterized in that: It further includes a power relay (K1), a power switch (K2) and a main relay (K3); the input end of the power relay (K1) is electrically connected to the BMS power supply + terminal, the two output ends are respectively electrically connected to the input end of the power switch (K2) and the positive electrode of the battery cell module, the input control end is electrically connected to the shutdown drive terminal, the output control end is electrically connected to the negative electrode of the battery cell module, and the output end of the power switch (K2) is electrically connected to the positive electrode of the battery cell module; the main relay (K3) is connected in series on the positive output line of the battery cell module, the input control end of the main relay (K3) is electrically connected to the discharge relay drive terminal, and the output control end is electrically connected to the negative electrode of the battery cell module; the BMS power supply - terminal is electrically connected to the negative electrode of the battery cell module.

2. The battery dormancy management system for a commercial vehicle parking lithium battery according to claim 1, wherein: It further includes a shunt resistor (F); the shunt resistor (F) is connected in series on the negative output line of the battery cell module.

3. The battery sleep management system applied to the parking lithium battery of a commercial vehicle according to claim 1 or 2, characterized in that: The power relay (K1) is a single - pole double - throw relay.

4. The battery dormancy management system for a commercial vehicle parking lithium battery according to claim 3, wherein: The single - pole double - throw relay includes an input contact terminal (30) electrically connected to the BMS power supply + terminal, a first output contact terminal (88) electrically connected to the input end of the power switch (K2), a second output contact terminal (87) electrically connected to the positive electrode of the battery cell module, and two single - pole double - throw relay coil terminals (85, 86) respectively electrically connected to the shutdown drive terminal and the negative electrode of the battery cell module.

5. A battery sleep management system applied to a parking lithium battery of a commercial vehicle according to claim 1, 2 or 4, characterized in that: The main relay (K3) is a discharge relay.

6. The battery dormancy management system applied to the parking lithium battery of a commercial vehicle according to claim 5, characterized in that: The discharge relay includes two discharge relay coil terminals respectively electrically connected to the discharge relay drive terminal and the negative electrode of the battery cell module.

7. A battery sleep management system applied to a parking lithium battery of a commercial vehicle according to any one of claims 1-2, 4, and 6, characterized in that: The power switch (K2) is a self - reset manual switch.

8. The battery sleep management system applied to the parking lithium battery of a commercial vehicle according to claim 2, characterized in that: The shunt resistor (F) is electrically connected to the BMS battery management system.

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