Dual-path power charging and discharging control system and method for vehicle storage battery

Abstract

The application discloses a dual-path power supply charging and discharging control system and method for vehicle storage batteries, collects real-time voltages of a running storage battery and a parking storage battery and vehicle starting signals, vehicle control signals and internal control signals; according to the collected real-time voltages and signals, corresponding control signals are output based on preset control logic; and according to the output control signals, the opening and closing states of multiple relays are controlled, thereby the charging and discharging of the running storage battery and the parking storage battery are controlled. According to the collected storage battery voltage states, the application accurately controls the on-off states of the relay circuit, realizes normal discharging use and timely charging of the dual-path power supply of the storage batteries, improves the charging efficiency, avoids the running storage battery and the parking storage battery from being in a power shortage state, and prolongs the service life of the storage batteries.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle battery control, and in particular to a dual-path power supply charging and discharging control system and method for a vehicle storage battery. BACKGROUND

[0002] Medical vehicles, emergency command vehicles, emergency communication vehicles and the like are widely used in the market as special commercial vehicles. The electrical systems of these special commercial vehicles are generally divided into two parts: a running electrical system and a parking electrical system. The running electrical system has a voltage level of DC 24V and is usually powered by a lead-acid storage battery. It is mainly used for starting the vehicle engine and lighting the vehicle electrical system in the running state. The parking electrical system has a voltage level of AC 220 / 380V or DC 24V. For specific parking equipment, AC 220 / 380V external power supply is usually used for power supply. In general, DC 24V lead-acid storage batteries are usually used for power supply. They are mainly used for lighting the vehicle electrical system in the parked state after the vehicle engine is turned off.

[0003] The lead-acid storage battery used for power supply in the vehicle electrical system has a wide range of use scenarios and is used frequently. When the running time is short, if the lead-acid storage battery of the running electrical system, i.e., the running storage battery, cannot be quickly replenished after being consumed, it is easy to run out of power. If external power supply is not used during parking, but the lead-acid storage battery of the parking electrical system, i.e., the parking storage battery, is used for a long time, the parking storage battery will run out of power. Whether it is the running storage battery or the parking storage battery, if the storage battery cannot be charged in time and runs out of power, the storage battery is easy to be damaged, resulting in high maintenance costs. SUMMARY

[0004] To solve the above problems of the prior art, the present application provides a dual-path power supply charging and discharging control system and method for a vehicle storage battery. The on-off of the relay circuit is accurately controlled according to the collected storage battery voltage state, the normal discharging use and timely charging of the dual-path power supply of the storage battery are realized, the charging efficiency is improved, the running storage battery and the parking storage battery are prevented from running out of power, and the service life of the storage battery is prolonged.

[0005] In a first aspect, the present disclosure provides a dual-path power supply charging and discharging control system for a vehicle storage battery.

[0006] A dual-path power supply charging and discharging control system for a vehicle storage battery comprises:

[0007] A voltage acquisition module is configured to acquire real-time voltages of a running storage battery and a parking storage battery, as well as vehicle start signals, vehicle control signals and internal control signals.

[0008] A control module is electrically connected to the voltage acquisition module. The control module is configured to output corresponding control signals based on a preset control logic according to the acquired real-time voltages and signals.

[0009] The relay module is electrically connected with the control module and includes a plurality of relays electrically connected with various devices inside the vehicle, for controlling the opening and closing states of the plurality of relays according to the output control signal, thereby controlling the charging and discharging of the running battery and the parking battery.

[0010] The further technical solution further comprises:

[0011] The power module is electrically connected with the voltage acquisition module, the control module and the relay module, for supplying power to each module.

[0012] In the further technical solution, the vehicle starting signal includes a vehicle ON signal and a vehicle start signal; the vehicle control signal includes a forced starting signal S, a running battery external forced starting signal S1 and a parking battery external forced starting signal S2; and the internal control signal includes a control system internal first forced starting signal X1 and a control system internal second forced starting signal X2.

[0013] In the further technical solution, in the relay module, a first relay K1 and a second relay K2 are connected in series and electrically connected with the running electrical system, a third relay K3 and a fourth relay K4 are connected in series and electrically connected with the large-current load, a fifth relay K5 and a sixth relay K6 are connected in series and connected with the positive pole of the running battery and the positive pole of the parking battery, and a power module is connected with a seventh relay K7, and the seventh relay K7 is also connected with a parking battery on-off signal.

[0014] In the further technical solution, the preset control logic comprises:

[0015] The running battery voltage V1 and the parking battery voltage V2 are acquired, and when V1≥27.0V and V2≥14.0V, or V1≥14.0V and V2≥27.0V, an isolation control signal K0 is outputted;

[0016] When V1>22.0V, a low-voltage protection control signal K1 is outputted; when V1≤22.5V, an alarm signal B1 is outputted, and a running battery power warning light is controlled to be lighted based on the alarm signal B1; when V2>21.5V, a low-voltage protection control signal K2 is outputted; and when V2≤22.0V, an alarm signal B2 is outputted, and a parking battery power warning light is controlled to be lighted based on the alarm signal B2;

[0017] The vehicle ON signal and the forced starting signal S are acquired, and an isolation control signal K0 is outputted;

[0018] The vehicle ON signal and the running battery external forced starting signal S1 are acquired, or the vehicle ON signal and the system internal first forced starting signal X1 are acquired, and a low-voltage protection control signal K1 is outputted;

[0019] acquire the vehicle ON signal and the parking battery external forced start signal S2, or acquire the vehicle ON signal and the system internal second forced start signal X2, and output a low-voltage protection control signal K2;

[0020] acquire the vehicle start signal, and output a running engine start signal K3.

[0021] Further, according to the output control signal, the opening and closing states of the plurality of relays are controlled, and the charging and discharging of the running battery and the parking battery are controlled.

[0022] When the low-voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are controlled to be closed, and the running battery supplies power to the running electrical system;

[0023] When the running engine start signal K3 is input, the third relay K3 and the fourth relay K4 are controlled to be closed, and the large-current load is driven;

[0024] When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are controlled to be closed, the running battery and the parking battery are connected, and the vehicle generator or the external power supply simultaneously charges the running battery and the parking battery;

[0025] When the parking battery opening and closing signal is input, the seventh relay K7 is closed, and the parking battery is connected; otherwise, when the parking battery opening and closing signal is not input, the seventh relay K7 is disconnected, and the running battery is connected.

[0026] In a second aspect, the disclosure provides a dual-path power supply charging and discharging control method for a vehicle battery.

[0027] A dual-path power supply charging and discharging control method for a vehicle battery, comprising the following steps:

[0028] Collecting real-time voltages of the running battery and the parking battery, and vehicle start signals, vehicle control signals and internal control signals;

[0029] According to the collected real-time voltages and signals, based on the preset control logic, the corresponding control signals are output;

[0030] According to the output control signal, the opening and closing states of the plurality of relays are controlled, and the charging and discharging of the running battery and the parking battery are controlled.

[0031] Further technical solutions, the vehicle start signal includes vehicle ON signal, vehicle start signal; the vehicle control signal includes forced start signal S, vehicle battery external forced start signal S1, parking battery external forced start signal S2; the internal control signal includes system internal first forced start signal X1, system internal second forced start signal X2.

[0032] Further technical solutions, the preset control logic includes:

[0033] Collecting vehicle battery voltage V1 and parking battery voltage V2, when V1≥27.0V and V2≥14.0V, or V1≥14.0V and V2≥27.0V, output isolation control signal K0;

[0034] When V1>22.0V, output low-voltage protection control signal K1; when V1≤22.5V, output alarm signal B1, and the vehicle battery power warning light is controlled to be lit based on the alarm signal B1; when V2>21.5V, output low-voltage protection control signal K2; when V2≤22.0V, output alarm signal B2, and the parking battery power warning light is controlled to be lit based on the alarm signal B2;

[0035] Get vehicle ON signal and forced start signal S, output isolation control signal K0;

[0036] Get vehicle ON signal and vehicle battery external forced start signal S1, or get vehicle ON signal and system internal first forced start signal X1, output low-voltage protection control signal K1;

[0037] Get vehicle ON signal and parking battery external forced start signal S2, or get vehicle ON signal and system internal second forced start signal X2, output low-voltage protection control signal K2;

[0038] Get vehicle start signal, output vehicle engine start signal K3.

[0039] Further technical solutions, according to the output control signal, control the opening and closing state of multiple relays, and further control the charging and discharging of the vehicle battery and the parking battery, including:

[0040] When the low-voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are controlled to be closed, and the vehicle battery supplies power to the vehicle electrical system;

[0041] When the vehicle engine start signal K3 is input, the third relay K3 and the fourth relay K4 are controlled to be closed, and the large-current load is driven;

[0042] When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are controlled to be closed, the running battery is connected with the parking battery, and the vehicle generator or external power supply simultaneously charges the running battery and the parking battery;

[0043] When the parking battery closing signal is input, the seventh relay K7 is closed to connect the parking battery; otherwise, when the parking battery closing signal is not input, the seventh relay K7 is disconnected to connect the running battery.

[0044] The above one or more technical solutions have the following beneficial effects:

[0045] 1. The application provides a dual-path power supply charging and discharging control system and method for a vehicle battery, which can accurately control the on-off of a relay circuit according to the collected battery voltage state, realize normal discharging use and timely charging of the dual-path power supply of the battery, avoid the running battery and the parking battery from being in a power shortage state, and prolong the service life of the battery.

[0046] 2. The application controls the connection of the running battery and the parking battery through the isolation control signal, thereby realizing the simultaneous charging of the running battery and the parking battery, maximizing the charging of the battery, improving the charging efficiency, and reducing the risk of power shortage of the battery.

[0047] 3. The application has the function of detecting the ON signal, and when the ON signal is not detected, the system enters the sleep mode, and the S1, S2, X1 and X2 signals do not need to be detected in real time, so that the power consumption can be maximally reduced.

[0048] 4. The application adopts wide voltage power supply and is suitable for 12V / 24V voltage scenes, and the application is not only suitable for a dual-path power supply control system, but also suitable for a three-path power supply control system. DETAILED DESCRIPTION

[0049] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application. The exemplary embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application.

[0050] Figure 1 FIG. 1 is a circuit structure schematic diagram of the dual-path power supply charging and discharging control system for the vehicle battery according to the application;

[0051] Figure 2 FIG. 2 is a circuit schematic diagram of the voltage acquisition module and the control module in the application;

[0052] Figure 3 FIG. 3 is a circuit schematic diagram of the relay module in the application. DETAILED DESCRIPTION

[0053] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0055] Embodiment One

[0056] The embodiment provides a dual-path power charging and discharging control system for vehicle storage batteries, as shown in the figure, comprising a voltage acquisition module, a control module, a relay module and a power module, the real-time voltage information of external circuit running storage batteries and parking storage batteries and vehicle starting signals, vehicle control signals and internal control signals are acquired through the voltage acquisition module, based on the acquired voltage information, the control module with corresponding control logic is used to control the turn-on and turn-off of each relay in the relay module of the system, the charging protection of the running storage batteries and the parking storage batteries is realized, timely charging is realized, the running storage batteries and the parking storage batteries are prevented from being in the situation of power loss, and the service life of the storage batteries is prolonged. Figure 1 In order to ensure the normal operation of each module, the power module is arranged in the above-mentioned dual-path power charging and discharging control system of the embodiment, the power module is electrically connected with the voltage acquisition module, the control module and the relay module, and supplies power for each module. Preferably, the power module adopts wide voltage power supply, which is suitable for DC12V and DC24V vehicles.

[0057] In the embodiment, the above-mentioned voltage acquisition module supports not less than 2-way voltage acquisition, can acquire the voltage value of the connected power supply, that is, is used to acquire the real-time voltage of the external circuit running storage batteries and the parking storage batteries, the range of the acquired voltage value is DC5V-DC28V, and the voltage acquisition module meets the power supply use of DC12V / DC24 voltage vehicles.

[0058]

[0059] ​Further, the voltage acquisition module is also used to acquire a vehicle starting signal, a vehicle control signal and an internal control signal, wherein the vehicle starting signal comprises a vehicle ON signal and a vehicle start signal, the vehicle control signal comprises a forced starting signal S, an external forced starting signal S1 of a running battery and an external forced starting signal S2 of a parking battery, and the internal control signal comprises a first internal forced starting signal X1 of a control system and a second internal forced starting signal X2 of the control system. The voltage acquisition module acquiring the above signals specifically refers to acquiring high and low levels of each signal. When the voltage acquisition module acquires a high level of a certain signal, it is considered that the voltage acquisition module acquires the signal. Conversely, when the voltage acquisition module acquires a low level of a certain signal, it is considered that the voltage acquisition module does not acquire the signal.

[0060] The voltage acquisition module transmits the acquired information to a control module. The control module is provided with corresponding control logic. Based on the received acquisition signals, corresponding control signals are outputted. As shown in the control logic is: Figure 2

[0061] (1) Acquire the running battery voltage V1 and the parking battery voltage V2. When V1≥27.0V and V2≥14.0V, or V1≥14.0V and V2≥27.0V, output the isolation control signal K0. In this embodiment, when the running battery voltage V1 and the parking battery voltage V2 are higher than 27V and the battery voltage of any one is not lower than 14V, the control module outputs the isolation control signal K0. When the voltage of any one is higher than 27.0V, it indicates that the vehicle is in a running state, the engine has been started, the generator is generating electricity, and the battery is being charged. At this time, the voltage of the battery is 28V, or it indicates that there is a city power connected to the outside of the vehicle. When the city power is connected, the inverter integrated machine charges the auxiliary battery. At this time, the voltage of the auxiliary battery is 27.5V. In this case, the isolation control signal K0 is outputted, so that the generator or the external city power can charge the running battery and the parking battery. At the same time, the battery voltage is not lower than 14V, which can protect the battery and avoid the problem of damage caused by charging in the case of power loss.

[0062] (2) Acquire the vehicle ON signal and the forced starting signal S. That is, when the vehicle ON signal is acquired as a high level, the acquired forced starting signal S is also a high level, and the isolation control signal K0 is outputted. In this embodiment, when the vehicle ON signal is detected, it indicates that the vehicle is started. At this time, when the forced starting signal S is detected, it indicates that the battery is forced to start charging, which is a special case of connecting the running battery and the parking battery and simultaneously charging and using.

[0063] ​(3) Obtain the running battery voltage V1, and output a low-voltage protection control signal K1 when V1>22.0V. When the running battery V1 is detected to be higher than 22.0V, it indicates that the vehicle can normally use the running battery in the running state, at this time, the running electrical system normally operates, and when the running battery V1 is detected to be lower than 22.0V, in order to protect the safety of the running battery and avoid the use of the running battery in the state of power shortage, the vehicle no longer uses the running battery.

[0064] (4) Obtain the vehicle ON signal and the running battery external forced starting signal S1, that is, when the vehicle ON signal is high, the running battery external forced starting signal S1 is also high, and output a low-voltage protection control signal K1. In an emergency, the running battery external forced starting signal S1 is externally input, and the low-voltage protection control signal K1 is output, no matter what voltage the running battery V1 is, the running battery can be used, and thus the running battery can still be used when the voltage is lower than 22V.

[0065] (5) Obtain the vehicle ON signal and the control system internal first forced starting signal X1, that is, when the vehicle ON signal is high, the control system internal first forced starting signal X1 is also high, and output a low-voltage protection control signal K1. In this embodiment, the system itself sets a forced starting switch, when the switch is turned on, the control system internal first forced starting signal X1 is high, at this time, the low-voltage protection control signal K1 is also output, no matter what voltage the running battery V1 is, the running battery can be used. By setting the forced starting switch, the opening and closing of the forced starting switch can be manually controlled by the driver, and the problem that the vehicle cannot be forced to start due to the failure of the running battery external forced starting signal S1 externally input can be avoided.

[0066] (6) Obtain the running battery voltage V1, and output an alarm signal B1 when V1≤22.5V, and the running battery power warning light is controlled to be lit based on the alarm signal B1. When the running battery voltage is lower than 22.5V, it indicates that the vehicle running battery voltage is low, at this time, the driver needs to be reminded of the low voltage, and the warning light is turned on to avoid the use of the running battery and cause the use of the battery in the state of power shortage.

[0067] (7) Obtain the parking battery voltage V2, and output a low-voltage protection control signal K2 when V2>21.5V. When the running battery V2 is detected to be higher than 21.5V, it indicates that the vehicle can normally use the parking battery in the parking state, at this time, the parking electrical system normally operates, and when the parking battery V2 is detected to be lower than 21.5V, in order to protect the safety of the parking battery and avoid the use of the parking battery in the state of power shortage, the vehicle no longer uses the parking battery.

[0068] (8) Get the vehicle ON signal and the parking battery external forced start signal S2, that is, when the collected vehicle ON signal is high, the collected parking battery external forced start signal S2 is also high, and the low-voltage protection control signal K2 is output. In an emergency, the parking battery external forced start signal S2 is externally input, the isolation control signal K2 is output, and the parking battery can be used regardless of the voltage of the parking battery V2, so that the parking battery can still be used when the voltage of the parking battery is lower than 21.5V.

[0069] (9) Get the vehicle ON signal and the control system internal second forced start signal X2, that is, when the collected vehicle ON signal is high, the collected control system internal second forced start signal X2 is also high, and the low-voltage protection control signal K2 is output. In this embodiment, the system itself also sets a forced start switch, and when the switch is turned on, the control system internal second forced start signal X2 is high, and at this time, the low-voltage protection control signal K2 is also output. Regardless of the voltage of the parking battery V2, the parking battery can be used. By setting the forced start switch, the driver can manually control the opening and closing of the forced switch, avoiding the problem that the vehicle cannot be forced to start due to the failure of the parking battery external forced start signal S2 input from the outside of the vehicle.

[0070] (10) Get the parking battery voltage V2, when V2≤22.0V, output the warning signal B2, and control the driving battery power warning light based on the warning signal B2. When the parking battery voltage is lower than 22.0V, it indicates that the vehicle parking battery voltage is low, and at this time, the driver needs to be reminded of the low voltage, and the warning light is on to avoid the use of the parking battery again and cause the loss of the battery.

[0071] (11) Get the vehicle start signal, that is, when the collected vehicle start signal is high, output the driving engine start signal K3, and the driving engine start signal K3 is used to drive the relay in the relay module to close, and then drive the large current load.

[0072] Based on the above control logic, the control module outputs corresponding control signals according to the input signals, and controls the opening and closing of each relay in the relay module through the control signals. In this embodiment, the relay module is electrically connected with the control module, and is also electrically connected with the driving electrical system, the driving battery positive electrode, the parking battery positive electrode, and the power module. Specifically, the relay module includes a plurality of relays, such as Figure 3As shown, the distribution box of the running electrical system and the mechanical switch of the running electrical system are two physical connection nodes in the running electrical system, the first relay K1 and the second relay K2 are connected in series and electrically connected to the running electrical system, the third relay K3 and the fourth relay K4 are connected in series and electrically connected to the large current load, the fifth relay K5 and the sixth relay K6 are connected in series and electrically connected to the positive pole of the running battery and the positive pole of the parking battery, the power module is connected to the seventh relay K7, the seventh relay K7 is also connected to the parking battery switch closing signal, when the K7 relay is not attracted (i.e. open), the running battery is connected, when the K7 relay is attracted (i.e. closed), the parking battery is connected, which ensures the normal operation of the system in the running state and the parking state. In addition, Figure 3 The ground shown in the middle is the negative pole of the entire system.

[0073] The above-mentioned relay module controls the opening and closing state of the relay according to the received control signal, and the control logic is as follows:

[0074] (1) In the initial state, each relay in the relay module is in the open state, when starting the dual-path power charging and discharging control system, the parking battery switch closing signal is connected to the seventh relay K7, when no parking battery switch closing signal is received, the seventh relay K7 is disconnected, at this time the running battery is connected, and the entire system is powered by the running battery; if the parking battery switch closing signal is received, the seventh relay K7 is closed, at this time the parking battery is connected, and the entire system is powered by the parking battery.

[0075] (2) When the low-voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are closed, and the running battery supplies power to the running electrical system, at this time the running electrical system operates normally; otherwise, it indicates that the running battery is in a low-voltage state at this time, and the first relay K1 and the second relay K2 are in the open state, at this time, the running electrical system does not operate normally, thereby avoiding the problem of damage caused by long-term use when the running battery voltage is low, and realizing the protection function of the running battery.

[0076] Similarly, the control mode of the low-voltage protection control signal K2 is the same as that of the above-mentioned low-voltage protection control signal K1, which will not be described here.

[0077] (3) When the running engine start signal K3 is input, the third relay K3 and the fourth relay K4 are closed, and the large current load is driven.

[0078] (4) When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are closed, at this time, the running battery and the parking battery are connected, and the vehicle generator or external power supply can simultaneously charge the running battery and the parking battery, achieving the purpose of timely charging.

[0079] The double-path power supply charge-discharge control system of the vehicle storage battery can accurately control the on-off of the circuit according to the voltage state of the storage battery, realize normal discharge use and timely charging of the double-path power supply of the storage battery, avoid the situation that the running storage battery and the parking storage battery are in power shortage, prolong the service life of the storage battery, and when charging, the running storage battery and the parking storage battery can be charged at the same time, the storage battery is charged to the maximum, and the risk of battery power shortage is reduced.

[0080] Embodiment two

[0081] The embodiment provides a double-path power supply charge-discharge control method of a vehicle storage battery, which is realized on the basis of the double-path power supply charge-discharge control system of the vehicle storage battery provided in the above embodiment one, and specifically includes the following steps.

[0082] Step S1, collecting real-time voltages of a vehicle running storage battery and a vehicle parking storage battery, and vehicle starting signals, vehicle control signals and internal control signals;

[0083] Step S2, outputting corresponding control signals based on a preset control logic according to the collected real-time voltages and signals;

[0084] Step S3, controlling the opening and closing states of multiple relays according to the output control signals, and then controlling the running generator or external power supply to charge the running storage battery and the parking storage battery and controlling the running storage battery and the parking storage battery to discharge.

[0085] In the embodiment, in step S1, the real-time voltages V1 and V2 of the vehicle running storage battery and the vehicle parking storage battery are collected, and among the collected vehicle starting signals, vehicle control signals and internal control signals, the vehicle starting signals include a vehicle ON signal and a vehicle start signal, the vehicle control signals include a forced starting signal S, a running storage battery external forced starting signal S1 and a parking storage battery external forced starting signal S2, and the internal control signals include a control system internal first forced starting signal X1 and a control system internal second forced starting signal X2.

[0086] In step S2, the preset control logic is as follows.

[0087] (1) acquiring the running storage battery voltage V1 and the parking storage battery voltage V2, when V1 is greater than or equal to 27.0V and V2 is greater than or equal to 14.0V, or V1 is greater than or equal to 14.0V and V2 is greater than or equal to 27.0V, outputting an isolation control signal K0;

[0088] (2) acquiring the vehicle ON signal and the forced starting signal S, and outputting the isolation control signal K0;

[0089] (3) Get the running battery voltage V1, when V1> 22.0V, output low voltage protection control signal K1;

[0090] (4) Get the vehicle ON signal and the running battery external forced start signal S1, output low voltage protection control signal K1;

[0091] (5) Get the vehicle ON signal and the control system internal first forced start signal X1, output low voltage protection control signal K1;

[0092] (6) Get the running battery voltage V1, when V1≤22.5V, output warning signal B1, and control the running battery power warning light based on the warning signal B1;

[0093] (7) Get the parking battery voltage V2, when V2> 21.5V, output low voltage protection control signal K2;

[0094] (8) Get the vehicle ON signal and the parking battery external forced start signal S2, output low voltage protection control signal K2;

[0095] (9) Get the vehicle ON signal and the control system internal second forced start signal X2, output low voltage protection control signal K2;

[0096] (10) Get the parking battery voltage V2, when V2≤22.0V, output warning signal B2, and control the parking battery power warning light based on the warning signal B2;

[0097] (11) Get the vehicle start signal, output the running engine start signal K3.

[0098] In step S3, according to the output control signal, the opening and closing state of the plurality of relays is controlled, and the charging and discharging of the running battery and the parking battery is controlled, specifically:

[0099] (1) When the low voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are closed, and the running battery supplies power to the running electrical system;

[0100] (2) When the running engine start signal K3 is input, the third relay K3 and the fourth relay K4 are closed, and the large current load is driven;

[0101] (3) When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are closed, the running battery and the parking battery are connected, and the vehicle generator or external power supply charges the running battery and the parking battery at the same time;

[0102] (4) When the parking battery switch closing signal is input, the seventh relay K7 is closed, the parking battery is connected, and the whole system is powered by the parking battery; otherwise, when the parking battery switch closing signal is input, the seventh relay K7 is disconnected, the running battery is connected, and the whole system is powered by the running battery.

[0103] The steps involved in the above embodiments two to four correspond to those of embodiment one, and the specific implementation can refer to the relevant description of embodiment one.

[0104] Those skilled in the art should understand that the above-mentioned modules or steps of the present application can be realized by a general computer device, alternatively, they can be realized by program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be respectively manufactured into integrated circuit modules, or a plurality of modules or steps among them can be manufactured into a single integrated circuit module. The present application is not limited to any specific combination of hardware and software.

[0105] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0106] The above describes the specific embodiments of the present application in combination with the accompanying drawings, but is not used to limit the protection scope of the present application. Those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. A dual-power charging and discharging control system for a vehicle battery, characterized in that, The application relates to a vehicle battery control system, which comprises the following parts: a voltage acquisition module, which is used for acquiring real-time voltages of a running battery and a parking battery, and vehicle starting signals, vehicle control signals and internal control signals; a control module, which is electrically connected with the voltage acquisition module and is used for outputting corresponding control signals based on preset control logic according to the acquired real-time voltages and signals; the preset control logic comprises the following steps: acquiring running battery voltage V1 and parking battery voltage V2, and outputting an isolation control signal K0 when V1 is greater than or equal to 27.0V and V2 is greater than or equal to 14.0V, or V1 is greater than or equal to 14.0V and V2 is greater than or equal to 27.0V; outputting a low-voltage protection control signal K1 when V1 is greater than 22.0V, outputting an alarm signal B1 when V1 is less than or equal to 22.5V, controlling a running battery power warning lamp to be lighted based on the alarm signal B1, outputting a low-voltage protection control signal K2 when V2 is greater than 21.5V, and outputting an alarm signal B2 when V2 is less than or equal to 22.0V, and controlling a parking battery power warning lamp to be lighted based on the alarm signal B2; acquiring a vehicle ON signal and a forced starting signal S, and outputting the isolation control signal K0; acquiring a vehicle ON signal and a running battery external forced starting signal S1, or acquiring a vehicle ON signal and a system internal first forced starting signal X1, and outputting the low-voltage protection control signal K1; acquiring a vehicle ON signal and a parking battery external forced starting signal S2, or acquiring a vehicle ON signal and a system internal second forced starting signal X2, and outputting the low-voltage protection control signal K2; acquiring a vehicle start signal, and outputting a running engine starting signal K3; a relay module, which is electrically connected with the control module and comprises a plurality of relays electrically connected with various devices in the vehicle, is used for controlling the opening and closing states of the plurality of relays according to the output control signals, and then controlling the charging and discharging of the running battery and the parking battery; in the relay module, a first relay K1 and a second relay K2 are connected in series and are electrically connected with a running electrical system, a third relay K3 and a fourth relay K4 are connected in series and are electrically connected with a large-current load, a fifth relay K5 and a sixth relay K6 are connected in series and are connected with a positive pole of the running battery and a positive pole of the parking battery, a power module is connected with a seventh relay K7, and the seventh relay K7 is also connected with a parking battery switch closing signal.

2. A dual path power charging and discharging control system for a vehicle battery as defined in claim 1 further comprising: The application further relates to a vehicle battery control system, which comprises the following parts: a power module, which is electrically connected with the voltage acquisition module, the control module and the relay module, and is used for supplying power to the modules.

3. The dual path power charging and discharging control system for a vehicle battery of claim 1, wherein The vehicle starting signals comprise a vehicle ON signal and a vehicle start signal; the vehicle control signals comprise a forced starting signal S, a running battery external forced starting signal S1 and a parking battery external forced starting signal S2; and the internal control signals comprise a control system internal first forced starting signal X1 and a control system internal second forced starting signal X2.

4. The dual path power charging and discharging control system for a vehicle battery of claim 1, wherein The control of the opening and closing states of the plurality of relays according to the output control signals, and then the control of the charging and discharging of the running battery and the parking battery, comprise the following steps: when the low-voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are controlled to be closed, and the running battery supplies power to the running electrical system; When the running engine starting signal K3 is input, the third relay K3 and the fourth relay K4 are controlled to be closed to drive the large current load; When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are controlled to be closed, the running battery and the parking battery are connected, and the vehicle generator or the external power supply simultaneously charges the running battery and the parking battery; When the parking battery switch closing signal is input, the seventh relay K7 is closed to connect the parking battery; otherwise, when the parking battery switch closing signal is not input, the seventh relay K7 is disconnected to connect the running battery.

5. A dual path power supply charge-discharge control method for a vehicle storage battery, characterized by, The method comprises the following steps: collecting real-time voltages of the running battery and the parking battery, and collecting vehicle starting signals, vehicle control signals and internal control signals; outputting corresponding control signals based on the collected real-time voltages and signals and preset control logic; The preset control logic comprises: collecting the running battery voltage V1 and the parking battery voltage V2, and outputting the isolation control signal K0 when V1≥27.0V and V2≥14.0V, or V1≥14.0V and V2≥27.0V; outputting the low-voltage protection control signal K1 when V1>22.0V, outputting the alarm signal B1 when V1≤22.5V, and controlling the running battery power warning light to be lit based on the alarm signal B1, outputting the low-voltage protection control signal K2 when V2>21.5V, and outputting the alarm signal B2 when V2≤22.0V, and controlling the parking battery power warning light to be lit based on the alarm signal B2; acquiring the vehicle ON signal and the forced starting signal S, and outputting the isolation control signal K0; acquiring the vehicle ON signal and the running battery external forced starting signal S1, or acquiring the vehicle ON signal and the system internal first forced starting signal X1, and outputting the low-voltage protection control signal K1; acquiring the vehicle ON signal and the parking battery external forced starting signal S2, or acquiring the vehicle ON signal and the system internal second forced starting signal X2, and outputting the low-voltage protection control signal K2; acquiring the vehicle start signal, and outputting the running engine starting signal K3; controlling the opening and closing states of the plurality of relays based on the output control signals, and further controlling the charging and discharging of the running battery and the parking battery; wherein the first relay K1 and the second relay K2 are connected in series and electrically connected to the running electrical appliance system, the third relay K3 and the fourth relay K4 are connected in series and electrically connected to the large current load, the fifth relay K5 and the sixth relay K6 are connected in series and connected to the positive poles of the running battery and the parking battery, the power module is connected to the seventh relay K7, and the seventh relay K7 is also connected to the parking battery switch closing signal.

6. The method of claim 5, wherein the method further comprises the step of: The vehicle starting signals comprise the vehicle ON signal and the vehicle start signal; the vehicle control signals comprise the forced starting signal S, the running battery external forced starting signal S1 and the parking battery external forced starting signal S2; and the internal control signals comprise the system internal first forced starting signal X1 and the system internal second forced starting signal X2. ​ 7. The method of claim 5, wherein the method further comprises the step of: The control signal output controls the opening and closing state of the plurality of relays, and further controls the charging and discharging of the running battery and the parking battery, comprising: ​ When the low-voltage protection control signal K1 is input, the first relay K1 and the second relay K2 are controlled to be closed, and the running battery supplies power to the running electrical system; When the running engine start signal K3 is input, the third relay K3 and the fourth relay K4 are controlled to be closed, and the large-current load is driven; When the isolation control signal K0 is input, the fifth relay K5 and the sixth relay K6 are controlled to be closed, the running battery and the parking battery are connected, and the vehicle generator or the external power supply simultaneously charges the running battery and the parking battery; When the parking battery opening and closing signal is input, the seventh relay K7 is closed, and the parking battery is connected; otherwise, when the parking battery opening and closing signal is not input, the seventh relay K7 is disconnected, and the running battery is connected.

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