CN113352940A - Storage battery power supplementing method and system and vehicle - Google Patents

Storage battery power supplementing method and system and vehicle Download PDF

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Publication number
CN113352940A
CN113352940A CN202110751285.2A CN202110751285A CN113352940A CN 113352940 A CN113352940 A CN 113352940A CN 202110751285 A CN202110751285 A CN 202110751285A CN 113352940 A CN113352940 A CN 113352940A
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China
Prior art keywords
battery
power
voltage
storage battery
compensated
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CN202110751285.2A
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Chinese (zh)
Inventor
齐林剑
段志飞
符刚
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Guangzhou Xiaopeng Motors Technology Co Ltd
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Guangzhou Xiaopeng New Energy Vehicle Co Ltd
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Priority to CN202110751285.2A priority Critical patent/CN113352940A/en
Publication of CN113352940A publication Critical patent/CN113352940A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/13—Maintaining the SoC within a determined range
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The embodiment of the application discloses a storage battery power supplementing method, a storage battery power supplementing system and a vehicle, and relates to the technical field of batteries. The method comprises the following steps: the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated; when the storage battery to be compensated is in a power-lack state, the battery manager controls the direct-current relay to be attracted through the single channel so as to conduct a voltage conversion circuit comprising the power battery, the direct-current relay and the voltage converter; and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage. According to the method, when the storage battery to be supplemented is supplemented with electricity, the energy consumption can be reduced, and the problem of high energy consumption when the storage battery is supplemented with electricity is solved.

Description

Storage battery power supplementing method and system and vehicle
Technical Field
The application relates to the technical field of batteries, in particular to a storage battery power supplementing method, a storage battery power supplementing system and a vehicle.
Background
With the progress of battery power supply technology, batteries are widely applied to industries such as electric automobiles, transformer substations and the like. In such industries, a power supply system for supplying power generally includes a power battery with a higher output voltage and a storage battery with a lower output voltage. Taking a power supply system in an electric automobile as an example, after the power supply system works for a period of time, a power battery in the electric automobile can supplement power for a storage battery, so that the storage battery can be used for a longer time, and necessary electric quantity support is provided for driving.
The traditional storage battery power supplementing method comprises a method for supplementing power to a storage battery at regular time and a method for triggering power supplementing when the voltage of the storage battery is detected to be lower than a threshold value, if the storage battery is supplemented by the timing power supplementing method, the storage battery can be in a power-deficient state for a long time, and if the storage battery is in the power-deficient state for a long time, chemical reaction can occur to electrodes of the storage battery, so that an internal ion channel is blocked when the storage battery is charged, the charging performance of the storage battery is reduced, the storage battery is difficult to be fully charged, the service life of the storage battery is shortened, and greater energy waste can be caused; if a method for triggering power supplement when the voltage of the storage battery is detected to be lower than the threshold value is adopted, the problem of energy waste also exists, and therefore the storage battery power supplement method in the prior art has the problem of high energy consumption.
Disclosure of Invention
The application provides a storage battery power supplementing method, a storage battery power supplementing system and a vehicle, and can solve the problem of high energy consumption when the storage battery is used for supplementing power.
In a first aspect, an embodiment of the present application provides a storage battery power supplement method, which is applied to a storage battery power supplement system, where the storage battery power supplement system includes an electric quantity accumulation calculation module, a voltage converter, a dc relay, a battery manager, and a power battery, and the method includes: the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated; when the storage battery to be compensated is in a power-lack state, the battery manager controls the direct current relay to be attracted through an independent channel so as to conduct a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter; and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage.
In a second aspect, an embodiment of the present application further provides a battery recharging system, where the system includes: the device comprises a power battery, an electric quantity accumulation calculation module, a voltage converter, a direct current relay and a battery manager. The power battery is used for providing a first voltage; the electric quantity accumulation calculation module is connected with a storage battery to be compensated and is used for detecting the output current and the output voltage of the storage battery to be compensated and determining whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated; the voltage converter is respectively connected with the storage battery to be charged and the power battery and is used for converting a first voltage output by the power battery into a second voltage, wherein the first voltage is greater than the second voltage; the direct current relay is connected between the storage battery to be compensated and the power battery through an independent passage; and the battery manager is respectively connected with the direct current relay, the voltage converter and the electric quantity accumulation calculation module, and is used for controlling the attraction of the direct current relay through a single access when the storage battery to be compensated is in a power shortage state, so that the voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is switched on, and the voltage converter is used for outputting the power battery, the first voltage is converted into the second voltage to be compensated, and the power compensation of the storage battery is realized.
In a third aspect, the embodiment of the application further provides a vehicle, and the vehicle comprises a vehicle body and the storage battery power supplementing system.
The method provided by the application comprises the following steps: in the storage battery power supply system comprising the electric quantity accumulation calculation module, the voltage converter, the direct current relay, the battery manager and the power battery, the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be supplied, and determines whether the storage battery to be supplied is in a power shortage state according to the output current and the output voltage of the storage battery to be supplied, if the storage battery to be supplied is in the power shortage state, the battery manager controls the attraction of the direct current relay through an independent access, so that a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is conducted, the voltage converter converts the first voltage output by the power battery into the second voltage to supply the storage battery to be supplied, and the first voltage is greater than the second voltage. When the storage battery to be compensated is in a power shortage state, the battery manager is started to control the whole power compensation process, and in the process, the battery manager, the direct-current relay and the voltage converter are started to operate only when power compensation is needed, so that energy needed by normal operation of each device in the storage battery power compensation system is consumed only in the power compensation process, and energy consumed in power compensation of the storage battery can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for supplementing power to a storage battery according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating a method for supplementing power to a storage battery according to another embodiment of the present application;
fig. 3 is a schematic flow chart illustrating a method for supplementing power to a storage battery according to another embodiment of the present application;
fig. 4 is a block diagram illustrating a structure of a battery recharging system in which a dc relay is connected between a power battery and a voltage converter through a single path according to still another embodiment of the present disclosure;
fig. 5 is a block diagram illustrating a battery charging system in which a dc relay is connected between a battery to be charged and a voltage converter through a single path according to still another embodiment of the present disclosure;
fig. 6 is a block diagram illustrating a structure of a battery charging system including a high-voltage relay and a low-voltage relay according to still another embodiment of the present application;
fig. 7 shows a schematic diagram of a vehicle according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Hereinafter, technical terms related to the present application will be described first.
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor, and meets various requirements of road traffic, safety regulations and the like. Electric vehicles may include pure electric vehicles, hybrid electric vehicles, and fuel cell vehicles, among other types. The electric automobile is composed of mechanical systems such as an electric drive system, a control system, a drive force transmission system and the like, and working devices for realizing other functions. The electric driving and controlling system is the core of the electric automobile and is the biggest difference between the electric automobile and the traditional internal combustion engine automobile. The electric driving and controlling system consists of driving motor, power source, speed regulating controller of motor, etc. Other devices of the electric vehicle are substantially the same as those of the internal combustion engine vehicle. The power supply may provide electrical energy to a drive motor of the electric vehicle, which may convert the electrical energy of the power supply into mechanical energy to drive wheels and other work devices directly or through a transmission. The electric automobile can comprise two types of batteries, wherein one type of battery is a power battery and can be used for providing a first voltage for an engine of the whole automobile, and the other type of battery is a low-voltage battery and can be used for providing a second voltage for electric equipment of the whole automobile, such as a central control and an indicator lamp, wherein the first voltage is greater than the second voltage.
The power battery is a power supply for supplying power to the equipment, and the power battery mentioned in the application can be a power supply for supplying driving power energy to the electric automobile, and has higher capacity and output power. The power battery has a relatively complete management system, and the health state of the power battery can be detected through the management system, and the charging and discharging of the power battery are managed, so that the normal work of the power battery is ensured.
The storage battery to be supplemented can be a storage battery which is used for providing a second voltage working power supply for a working device of the electric automobile. The storage battery to be compensated can convert a first voltage output by the power battery into a second voltage through the voltage converter for charging, wherein the first voltage is greater than the second voltage.
With the progress of electric automobile technology, the functions of electric automobiles are more and more complex, resulting in the increase of vehicle electric control units and electric equipment. The power supply of the electric vehicle generally comprises a power supply capable of outputting a first voltage and a low-voltage storage battery capable of outputting a second voltage, wherein the first voltage is greater than the second voltage, and the storage battery power supplementing method generally comprises the steps of converting the first voltage output by the power battery into the second voltage by using a voltage converter so as to supplement power for the storage battery to be supplemented, including a method of supplementing power for the storage battery to be supplemented regularly, and a method of triggering power supplementing when the voltage of the storage battery to be supplemented is detected to be lower than a threshold value. When the storage battery to be supplemented is used for supplementing electricity, the vehicle control unit VCU and other controllers need to be started, the voltage converter is controlled to convert the first voltage output by the power battery into the second voltage and supplement the electricity for the storage battery to be supplemented, and the energy consumption is high. Therefore, the traditional storage battery electricity supplementing method has the problem of high energy consumption.
Therefore, in order to alleviate the above drawbacks, an embodiment of the present application provides a storage battery power supplement method, which is applied to a storage battery power supplement system, where the storage battery power supplement system includes a power accumulation calculation module, a voltage converter, a dc relay, a battery manager, and a power battery, and the method includes: in the storage battery power supply system comprising the electric quantity accumulation calculation module, the voltage converter, the direct current relay, the battery manager and the power battery, the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be supplied, and determines whether the storage battery to be supplied is in a power shortage state according to the output current and the output voltage of the storage battery to be supplied, if the storage battery to be supplied is in the power shortage state, the battery manager controls the attraction of the direct current relay through an independent access, so that a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is conducted, the voltage converter converts the first voltage output by the power battery into the second voltage to supply the storage battery to be supplied, and the first voltage is greater than the second voltage.
Through when waiting to mend electric battery and being in insufficient voltage state, start the whole electricity supply process of battery manager control, only consume the energy that above-mentioned battery benefit electric system needs, consequently the method that this application provided can reduce the energy that the battery consumed when mending the electricity, and the higher problem of energy consumption when alleviating the battery and mended the electricity.
The following describes a method for replenishing power to a storage battery according to the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for supplementing power to a storage battery according to an embodiment of the present disclosure. The storage battery power supplementing method can comprise the following steps:
step S110: the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated.
In the embodiment of the present application, the electric quantity accumulation calculation module may be a Sensor for detecting operating parameters of the Battery, such as current, voltage, and electric charge quantity, specifically, the electric quantity accumulation calculation module may be an EBS (Electronic Battery Sensor) Sensor, and may also be another Sensor in a DCDC (Direct current-Direct current) converter. The EBS sensor may be configured to detect a current flowing into or out of the battery and perform an integration calculation, and may also be configured to detect a voltage of the battery, so as to obtain a charge amount of the battery according to the current flowing into or out of the battery and the voltage of the battery. The DCDC converter is a voltage converter that effectively outputs a fixed voltage after converting an input voltage. The DCDC converter is classified into a boost type DCDC converter, a buck type DCDC converter, and a boost type DCDC converter. The step-up type DCDC converter may be used to convert a low voltage into a high voltage, and the step-down type DCDC converter may be used to convert a high voltage into a low voltage.
The discharging mode of the storage battery to be charged can be that the storage battery to be charged supplies power to a working device of the vehicle and discharges in the driving process, or static power consumption is generated due to long-time parking or non-use of the vehicle, and the storage battery to be charged discharges. The output current and the output voltage of the storage battery to be compensated are respectively the current and the voltage of the storage battery to be compensated in the discharging process.
The condition that the storage battery to be supplemented is in a power-lack state can mean that the electric quantity of the storage battery to be supplemented is insufficient. When the storage battery to be compensated is in a power-deficient state, the load using the storage battery to be compensated as a power supply cannot obtain the rated voltage for normal operation.
In an exemplary embodiment, the above step S110 includes the following sub-steps:
substep S111: according to output current and output voltage of waiting to mend electric battery obtain wait to mend the output electric charge volume of electric battery, confirm whether the output electric charge volume of waiting to mend electric battery is not less than first preset threshold value, if the output electric charge volume of waiting to mend electric battery is not less than first preset threshold value, then wait to mend the electric battery and be in insufficient voltage state, if the output electric charge volume of waiting to mend the electric battery is less than first preset threshold value, then wait to mend the electric battery and not be in insufficient voltage state.
In the embodiment of the present application, the output charge amount of the battery to be charged is obtained according to the output current and the output voltage of the battery to be charged, and may be: in the discharging process of the storage battery to be compensated, the electric quantity accumulation calculation module can continuously detect the output current of the storage battery to be compensated and the output voltage of the storage battery to be compensated during each detection at a fixed frequency, and performs accumulation calculation to obtain the output electric charge quantity of the storage battery to be compensated.
The first preset threshold may be a battery charge amount threshold that is set by default by a vehicle including the battery recharging system before the vehicle is used by a user, and specifically, the first preset threshold may be 50%, 60%, or 70% of the charge amount of the battery to be recharged when the battery is fully charged.
As an optional embodiment, if the charge amount of the battery to be charged is 40Ah when the battery to be charged is fully charged, the first preset threshold may be 24Ah, if the charge amount output by the battery to be charged during the discharging process is greater than or equal to 24Ah, the battery to be charged is in a power-deficient state, and if the charge amount is less than 24Ah, the battery to be charged is not in the power-deficient state.
Step S120: and the battery manager controls the direct current relay to pull in through a single channel when the storage battery to be compensated is in a power-lack state, so that a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is switched on.
In the embodiment of the present application, the dc relay may be an electric appliance that generates a predetermined step change in the controlled amount in the electric output circuit when the change in the input amount of the first electric voltage path meets a predetermined requirement. The direct current relay may be composed of an iron core, a coil, an armature, and a contact spring. When the direct current relay control circuit is used, a coil of the direct current relay can be electrified to enable the coil to generate an electromagnetic effect through current, so that the armature overcomes the tensile force of the spring to approach the iron core under the attraction of the electromagnetic force, and the movable contact and the fixed contact of the armature are driven to attract each other. When the coil is powered off, the electromagnetic force disappears, and the armature returns to the original position under the counterforce of the spring, so that the movable contact and the fixed contact are released. The circuit where the direct current relay is located can be switched on and off by attracting and releasing the direct current relay.
In the embodiment of the present application, the voltage converter may be a DCDC converter, and may be configured to convert a first voltage output by the power battery into a second voltage smaller than the first voltage.
In the embodiment of the present application, the Battery manager may be a BMS (Battery Management System) Battery manager, and may also be a DCDC converter. The BMS battery manager can be used for carrying out on-line detection and real-time monitoring to the vehicle battery, provides information such as power battery voltage, electric current, temperature and insulating state for the vehicle, and real-time judgement battery's running state and group battery discreteness simultaneously, if breaking down, in time to the central control of vehicle or send fault signal and report to the police with vehicle correlated electronic equipment.
As an alternative embodiment, the battery manager is a BMS battery manager. The BMS battery manager CAN directly control the actuation/release of the direct current relay through a CAN (Controller Area Network) communication line connected between the BMS battery manager and the direct current relay through a single channel, so that a communication link in the battery power supplementing process is shorter, the power supplementing process is faster, and the energy consumption is less. Wherein CAN is a serial communication protocol certified by the international organization for standardization, and a CAN communication line may be used for the BMS battery manager and the dc relay communication.
The voltage conversion circuit can be formed by connecting a power battery, a direct current relay and a voltage converter in series, the voltage conversion circuit is conducted when the direct current relay is in a pull-in state, and the power battery can transmit first voltage to the voltage converter.
Step S130: and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage.
As an alternative, when the above method is applied to a vehicle, the battery to be recharged may be a low voltage battery, and may be used to provide 13V to a working device such as a lighting device of the vehicle, and the second voltage may be 13V. The power battery can be a high-voltage storage battery and can be used for providing 380V voltage for equipment such as a driving system, and the first voltage can be 380V. The low-voltage storage battery charging power supply can be provided by a power battery, but since the power battery provides 380V, the low-voltage storage battery needs 13V to 14V, and therefore a voltage converter is needed to convert the 380V voltage output by the power battery into 14V voltage so as to supply power to the low-voltage storage battery.
It should be understood that, when the above-mentioned method is applied to different devices, the voltage values of the first voltage and the second voltage may be set according to actual requirements, and are not described in detail here.
As an alternative embodiment, in order to maintain the battery performance of the power battery in consideration of the fact that the power battery may have insufficient power and the like and does not satisfy the power supply condition, before performing step S120, the method further includes:
the electric quantity accumulation calculation module detects the output current and the output voltage of the power battery and determines whether the power battery meets the power supply condition or not according to the output current and the output voltage of the power battery.
Step S120 may also be: the battery manager is in the battery that awaits making up is in insufficient voltage state, just power battery satisfies during the power supply condition, through independent access control direct current relay actuation.
In this embodiment, the electric quantity accumulation calculation module may include a first sensor, where the first sensor may be configured to detect an input current, an input voltage, an output current, and an output voltage of the battery to be recharged, and the electric quantity accumulation calculation module may also include a second sensor, where the second sensor may be configured to detect an output current and an output voltage of the power battery. When the electric quantity accumulation calculation module comprises a first sensor, the first sensor is connected with the storage battery to be compensated, namely the electric quantity accumulation calculation module is connected with the storage battery to be compensated; when the electric quantity accumulation calculation module comprises a second sensor, the second sensor is connected with the power battery, namely, the electric quantity accumulation calculation module is connected with the power battery. As an optional implementation manner, the electric quantity accumulation calculation module includes a first sensor and a second sensor, and correspondingly, the electric quantity accumulation calculation module is connected with the storage battery to be compensated and the power battery respectively.
Wherein, the power battery satisfying the power supply condition may mean that the remaining power of the power battery is sufficient. The sufficient residual capacity of the power battery can mean that the residual capacity of the power battery is sufficient to maintain the running of the whole vehicle for a preset time, so that a user can charge the power battery within the preset time.
The power battery meeting the power supply condition may also mean that the power battery is in a healthy state. The state of health of the power battery can be as follows: the working parameters of the power battery, such as voltage, current, battery temperature and the like, are in a normal range without damaging the power battery.
In this embodiment, the determination of whether the power battery satisfies the power supply condition according to the output current and the output voltage of the power battery may be: obtaining the output charge quantity of the power battery according to the output current and the output voltage of the power battery, determining whether the output charge quantity of the power battery is smaller than a second preset threshold value, if the output charge quantity of the power battery is smaller than the second preset threshold value, the power battery meets the power supply condition, and if the output charge quantity of the power battery is not smaller than the second preset threshold value, the power battery does not meet the power supply condition.
As an embodiment, the output charge amount of the power battery obtained according to the output current and the output voltage of the power battery may be: in the discharging process of the power battery, the electric quantity accumulation calculation module can continuously detect the output current of the power battery and the output voltage of the power battery during each detection at a fixed frequency, and performs accumulation calculation to obtain the output charge quantity of the power battery.
As another embodiment, the output charge amount of the power battery is obtained according to the output current and the output voltage of the power battery, and may be: the electric quantity accumulation calculation module obtains the residual electric charge quantity of the power battery by monitoring the voltage of the power battery, and then obtains the output electric charge quantity of the power battery through the electric charge quantity and the residual electric charge quantity of the power battery when the power battery is fully charged.
In the embodiment of the present application, the second preset threshold may be a power battery charge amount threshold set by a default for a vehicle including the battery recharging system before a user uses the vehicle, and specifically, the second preset threshold may be 50%, 60%, or 70% of the charge amount when the power battery is fully charged.
As an optional implementation manner, if the charge amount of the power battery is 180Ah when the power battery is fully charged, the second preset threshold may be 108Ah, if the charge amount output by the power battery during the discharging process is less than 108Ah, the power battery meets the power supply condition, and if the charge amount is greater than or equal to 108Ah, the power supply condition is not met.
In the method, when an electric quantity accumulation calculation module detects that a storage battery to be charged is in a power shortage state, a battery manager controls a direct current relay to pull in through a single channel so as to enable a voltage conversion circuit comprising a power battery, the direct current relay and a voltage converter to be conducted, and the voltage converter converts a first voltage output by the power battery into a second voltage so as to charge the storage battery to be charged. In the electricity supplementing process, only energy required by the storage battery electricity supplementing system is consumed, and energy required by a vehicle control unit VCU and other controllers in the traditional storage battery electricity supplementing method is not required to be consumed, so that the method provided by the application can reduce energy consumed in the electricity supplementing process of the storage battery, and the problem of high energy consumption in the electricity supplementing process of the storage battery is solved.
Referring to fig. 2, fig. 2 is a schematic flow chart of a method for supplementing power to a storage battery according to another embodiment of the present disclosure. The storage battery power supplementing method can comprise the following steps:
step S210: the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated.
Step S220: and the battery manager controls the direct current relay to pull in through a single channel when the storage battery to be compensated is in a power-lack state, so that a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is switched on.
Step S230: and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage.
Step S240: the electric quantity accumulation calculation module detects the input current and the input voltage of the storage battery to be compensated, and determines whether the storage battery to be compensated meets the condition of stopping power compensation or not according to the input current and the input voltage of the storage battery to be compensated.
In this embodiment of the application, determining whether the battery to be recharged satisfies the condition of stopping recharging according to the input current and the input voltage of the battery to be recharged may be: after the power supply and the voltage converter are used for supplying power to the storage battery to be supplied, whether the sum of the supplied electric quantity and the residual electric quantity reaches the range of sufficient electric quantity of the storage battery to be supplied is determined. If the electric quantity of the storage battery to be supplemented is in the sufficient range, the storage battery to be supplemented is supplemented with electricity sufficiently, and the condition of stopping electricity supplementation is met. If the electric quantity of the storage battery to be compensated is not in the sufficient range, the power compensation of the storage battery to be compensated is not sufficient, and the condition of stopping power compensation is not met.
In an exemplary embodiment, the above step S240 includes the following sub-steps:
substep S241: the method comprises the steps of obtaining the input charge quantity of a battery to be compensated according to the input current and the input voltage of the battery to be compensated, determining whether the input charge quantity of the battery to be compensated is not smaller than the output charge quantity of the battery to be compensated, if the input charge quantity of the battery to be compensated is not smaller than the output charge quantity of the battery to be compensated, the battery to be compensated meets the condition of stopping power compensation, and if the input charge quantity of the battery to be compensated is smaller than the output charge quantity of the battery to be compensated, the battery to be compensated does not meet the condition of stopping power compensation.
In the embodiment of the present application, the input charge amount of the battery to be charged is obtained according to the input current and the input voltage of the battery to be charged, and may be: in the power supplementing process of the storage battery to be supplemented, the electric quantity accumulation calculation module can continuously detect the input current of the storage battery to be supplemented and the input voltage of the storage battery to be supplemented in each detection at a fixed frequency, and performs accumulation calculation to obtain the input charge quantity of the storage battery to be supplemented.
The condition of stopping power supply can mean that the power supply amount of the storage battery to be supplied is equal to the discharge amount, namely, the storage battery to be supplied is fully charged. And if the input charge quantity of the storage battery to be compensated is smaller than the output charge quantity of the storage battery to be compensated, the power compensation quantity of the storage battery to be compensated is smaller than the discharge quantity, the storage battery is not fully charged, and the condition of stopping power compensation is not met. And if the input charge quantity of the storage battery to be compensated is equal to the output charge quantity of the storage battery to be compensated, the compensation quantity of the storage battery to be compensated is equal to the discharge quantity, and the storage battery to be compensated is fully charged at the moment, so that the condition of stopping power compensation is met.
As an optional embodiment, if the charge quantity of the storage battery to be compensated is 40Ah when the storage battery to be compensated is fully charged, the discharged electricity quantity is 24Ah, if the charge quantity input by the storage battery to be compensated in the power compensation process is equal to 24Ah, the storage battery to be compensated meets the condition of stopping power compensation, and if the charge quantity is less than 24Ah, the storage battery to be compensated does not meet the condition of stopping power compensation.
Step S250: and when the storage battery to be compensated meets the condition of stopping power compensation, the battery manager controls the release of the direct current relay through an independent channel so that the power battery stops compensating the storage battery to be compensated.
In the embodiment of the application, the battery manager controls the release of the direct current relay through the single channel, so that the circuit where the direct current relay is located can be disconnected. The circuit where the direct current relay is located can refer to a voltage conversion circuit formed by connecting a power battery, the direct current relay and a voltage converter in series, when the direct current relay is in a release state, the series circuit is disconnected, the power battery stops transmitting the first voltage to the voltage converter, and therefore the power supply of the storage battery to be supplied is stopped.
The embodiment provides another storage battery power supplementing method, an electric quantity accumulation calculating module detects input current and input voltage of a storage battery to be supplemented in a power supplementing process, whether the storage battery to be supplemented meets a power supplementing condition is determined according to the input current and the input voltage of the storage battery to be supplemented, and when the storage battery to be supplemented meets the power supplementing condition, a battery manager controls a direct current relay to release through a single channel so that a power battery stops supplementing power to the storage battery to be supplemented.
Through being waited to mend electric storage battery benefit electric quantity and being equal to the electric quantity that discharges, when waiting to mend electric storage battery full charge promptly, the release of direct current relay is controlled through independent access to the battery manager to the disconnection is the voltage conversion circuit of the benefit electricity of benefit electricity storage battery, avoids still continuously charging after waiting to mend electric storage battery benefit electricity sufficient, the energy after the saving is waited to mend electric storage battery benefit electricity sufficient, consequently the method that this application provided can reduce the energy that the battery consumed when mending the electricity, the higher problem of energy resource consumption when alleviating the battery benefit electricity.
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for recharging a battery applicable to a vehicle according to another embodiment of the present disclosure. The storage battery power supplementing method can be used in the normal use process of a vehicle and can also be used in the dormant state of the vehicle. The storage battery power supplementing method can comprise the following steps:
step S310: the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated.
As an alternative embodiment, the step S310 may be performed when the vehicle is in a sleep state. Specifically, the vehicle sleep state may refer to a state in which each device in the vehicle enters a low power consumption state after the vehicle is powered off after being locked, so as to avoid static high power consumption. When the vehicle is in a dormant state, the battery charging system in the vehicle only maintains a simple battery detection function, and other high-power-consumption loads in the vehicle are in an off state. The vehicle user can unlock the door through the vehicle key so as to awaken the vehicle in the dormant state, and can unlock the door through modes such as remote 4G unlocking and Bluetooth unlocking so as to awaken the vehicle in the dormant state, and can awaken the whole vehicle without unlocking the door and only awaken equipment in a storage battery power supply system in the vehicle.
In this application embodiment, the battery manager may detect whether the vehicle locks and powers off, and if the vehicle locks and powers off, the battery manager may send a power-off sleep instruction to the voltage converter in the battery charging system to enable the voltage conversion device to enter a sleep state, and the battery manager may further control the release of the relay, and meanwhile, the battery manager may also enter the sleep state within a preset time period after the vehicle locks and powers off, but it should be noted that, in this application embodiment, when the vehicle is in the sleep state, the electric quantity accumulation calculation module may maintain a simple battery detection function.
Specifically, because the static power consumption of the vehicle in the sleep state is relatively stable, the electric quantity accumulation calculation module can continuously detect the output currents of the storage battery to be compensated and the power battery at a fixed frequency; the electric quantity accumulation calculation module can also reduce the sampling rate in the process of detecting the output voltage of the storage battery to be compensated and the output voltage of the power battery to be compensated so as to save energy consumption.
In an exemplary embodiment, if the battery to be recharged is not in a state of low power, the vehicle continues to remain in a state of hibernation, and the battery recharging system in the vehicle continues to maintain a simple battery detection function.
Step S320: and the electric quantity accumulation calculation module sends a first awakening instruction to the battery manager to awaken the battery manager when determining that the storage battery to be supplemented is in a power-shortage state.
When the electric quantity accumulation calculation module determines that the storage battery to be charged is in a power shortage state, the vehicle is still in a dormant state, and devices such as the battery manager and the voltage converter are not wakened up and start to work, so that the electric quantity accumulation calculation module sends a first wake-up instruction to the battery manager, wherein the first wake-up instruction is used for enabling the battery manager to be wakened up and start to work.
In the embodiment of the application, the electric quantity accumulation calculation module does not need to send an instruction to a VCU of the vehicle control unit, and then the vehicle control unit wakes up the battery manager, but can send a first wake-up instruction to the battery manager through an LIN (Local Interconnect Network) communication line connected between the electric quantity accumulation calculation module and the battery manager, so that the battery manager is directly woken up, a communication link in a battery recharging process is shorter, the recharging process is faster, the vehicle control unit does not need to be used, and less energy is consumed. The LIN is a low-cost Serial Communication protocol based on UART (Universal Asynchronous Receiver/Transmitter)/SCI (Serial Communication Interface), and the LIN Communication line can be used for Communication between the electric quantity accumulation calculation module and the battery manager.
As an optional implementation manner, when the electric quantity accumulation calculation module determines that the storage battery to be compensated is in a power shortage state, the electric quantity accumulation calculation module may increase a sampling rate, so that the detection of the input charge quantity of the storage battery to be compensated in the power compensation process is more accurate.
Step S330: and the electric quantity accumulation calculation module sends a power supplementing instruction to the battery manager so that the battery manager confirms that the storage battery to be supplemented is in a power shortage state when receiving the power supplementing instruction.
As an implementation manner, the power accumulation calculating module may supplement the power to the battery manager by: after the electric quantity accumulation calculation module sends the first awakening instruction to the battery manager and awakens the battery manager, the electric quantity accumulation calculation module sends a power supplementing instruction to the battery manager through an LIN communication line connected between the electric quantity accumulation calculation module and the battery manager, wherein the power supplementing instruction is used for enabling the battery manager to confirm that the storage battery to be supplemented is in a power shortage state, and starting to execute power supplementing operation on the storage battery to be supplemented.
As another embodiment, the power accumulation calculating module may supplement the power to the battery manager by using a command, and may further include: the electric quantity accumulation calculation module sends a first awakening instruction to the battery manager, and simultaneously sends a power supplementing instruction to the battery manager through an LIN communication line connected between the electric quantity accumulation calculation module and the battery manager, wherein the power supplementing instruction is used for enabling the battery manager to confirm that the storage battery to be supplemented is in a power shortage state, and starting to execute power supplementing operation on the storage battery to be supplemented.
Step S340: and the battery manager controls the direct current relay to pull in through a single channel when the storage battery to be compensated is in a power-lack state, so that a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter is switched on.
Step S350: and the battery manager sends a second awakening instruction to the voltage converter when the storage battery to be supplemented is in a power-lack state so as to awaken the voltage converter.
When the electric quantity accumulation calculation module determines that the storage battery to be compensated is in a power shortage state and wakes up the battery manager, the vehicle is still in a dormant state, and devices such as the voltage converter and the like are not wakened up and start to work, so that the battery manager CAN send a second wake-up instruction to the voltage converter through a CAN communication line connected between the battery manager and the voltage converter, wherein the second wake-up instruction is used for enabling the voltage converter to be wakened up and start to work.
In the embodiment of the present application, the step of the battery manager controlling the dc relay to pull in through the separate channel may be executed simultaneously with the step of the battery manager sending the second wake-up instruction to the voltage converter, or may be executed before the step of the battery manager sending the second wake-up instruction to the voltage converter, which is not limited in this application.
Step S360: and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage.
Step S370: the electric quantity accumulation calculation module detects the input current and the input voltage of the storage battery to be compensated, and determines whether the storage battery to be compensated meets the condition of stopping power compensation or not according to the input current and the input voltage of the storage battery to be compensated.
In an exemplary embodiment, if the storage battery to be recharged does not meet the condition of stopping recharging, the battery manager continues to control the direct current relay to keep a pull-in state through the single path, and the voltage converter continues to convert a first voltage output by the power battery into a second voltage to recharge the storage battery to be recharged, wherein the first voltage is greater than the second voltage.
Step S380: and the electric quantity accumulation calculation module sends a power supplementing stopping instruction to the battery manager when determining that the storage battery to be supplemented meets the power supplementing stopping condition, so that the battery manager determines that the storage battery to be supplemented meets the power supplementing stopping condition when receiving the power supplementing stopping instruction.
In this embodiment of the application, the manner in which the electric quantity accumulation calculation module sends the power supplement stopping instruction to the battery manager may be: and the electric quantity accumulation calculation module sends a power supply stopping instruction to the battery manager through an LIN communication line connected between the electric quantity accumulation calculation module and the battery manager, wherein the power supply stopping instruction is used for enabling the battery manager to confirm that the storage battery to be supplied meets the condition of stopping power supply and starting to execute the operation of stopping continuing power supply.
Step S390: and when the battery manager determines that the storage battery to be compensated meets the condition of stopping power compensation, the battery manager sends a sleep instruction to the voltage converter so as to enable the voltage converter to enter a sleep state.
When the storage battery to be compensated meets the condition of stopping power compensation, the storage battery to be compensated CAN not be charged any more, and the awakened equipment CAN enter the dormant state again in the process of power compensation of the storage battery to be compensated, so that the battery manager CAN send a dormant instruction to the voltage converter through a CAN communication line connected between the battery manager and the voltage converter, wherein the dormant instruction is used for enabling the voltage converter to enter the dormant state.
Step S3100: and when the storage battery to be compensated meets the condition of stopping power compensation, the battery manager controls the release of the direct current relay through an independent channel so that the power battery stops compensating the storage battery to be compensated.
In this embodiment of the application, the step of sending the sleep command to the voltage converter by the battery manager may be executed simultaneously with the step of controlling the release of the dc relay by the battery manager through the separate path, or may be executed prior to the step of controlling the release of the dc relay by the battery manager through the separate path, which is not limited in this application.
Step S3110: the battery manager enters a sleep state.
After the battery manager sends a sleep instruction to the voltage converter and controls the direct current relay to release through the single channel, or after the battery manager detects that the voltage converter enters the sleep state and the direct current relay is in the release state, the battery manager automatically enters the sleep state.
As an optional implementation manner, before the battery manager automatically enters the sleep state, the battery manager may send a power consumption reduction instruction to the power accumulation calculation module through a LIN communication line connected between the power accumulation calculation module and the battery manager, where the power consumption reduction instruction is used to cause the power accumulation calculation module to reduce the sampling rate, so as to save energy consumption.
As an optional embodiment, since there may be an error in the detection of the output charge amount and the input charge amount of the battery to be charged by the electric quantity accumulation calculation module, the battery to be charged may be charged once for a preset time period every preset interval time. For example, when the electric quantity accumulation calculation module confirms that the input electric charge quantity of the storage battery to be compensated is equal to the output electric charge quantity of the storage battery to be compensated, the power compensation is stopped, but due to the error of the electric quantity accumulation calculation module, the input electric charge quantity of the storage battery to be compensated is actually smaller than the output electric charge quantity of the storage battery to be compensated, and the storage battery to be compensated is not fully charged, so that the storage battery to be compensated can be compensated for 4 hours every other week, the storage battery to be compensated is ensured to be fully charged actually, and the accuracy of the electric quantity of the storage battery to be compensated is improved. It should be understood that after the preset mileage is driven by the vehicle, the power of the battery to be powered can be supplied for a preset time period, which is not limited in the present application.
In this embodiment, when the vehicle is in a sleep state and the electric quantity accumulation calculation module determines that the storage battery to be compensated is in a power-deficient state, the electric quantity accumulation calculation module wakes up the battery manager, sends a power compensation instruction to the battery manager, and then wakes up the voltage converter by the battery manager; when the electric quantity accumulation calculation module determines that the storage battery to be compensated meets the condition of power compensation stopping, the electric quantity accumulation calculation module sends a command of power compensation stopping to the battery manager, the battery manager sends a sleep command to the voltage converter, and then the battery manager enters a sleep state.
Just awaken the equipment in the battery power supply system through treating when the tonifying electricity battery is in insufficient voltage state to make the equipment of awakening up get into the dormant state again when waiting to mend the electricity battery and satisfying the condition of stopping the tonifying electricity, avoid awakening the equipment in the battery power supply system when waiting to mend the electricity battery and need not mend the electricity, the energy in the time of saving waiting to mend the electricity battery and need not mend the electricity, consequently, the energy that consumes when the method that this application provided can reduce the battery and mend the electricity, the higher problem of energy consumption when alleviating the battery and mended the electricity.
Referring to fig. 4, fig. 4 is a block diagram of a battery charging system according to still another embodiment of the present disclosure. The battery charging system 100 includes: the power battery 110, the electric quantity accumulation calculating module 120, the voltage converter 130, the direct current relay 140 and the battery manager 150.
The storage battery power supply system 100 may be configured to execute the storage battery power supply method in the foregoing embodiment, and for the specific description of the storage battery power supply system 100 executing the storage battery power supply method in the foregoing embodiment, reference may be made to the description of the storage battery power supply method in the foregoing embodiment, and details of this embodiment are not described again.
The power battery 110 is used for providing a first voltage; the electric quantity accumulation calculation module 120 is connected to the storage battery to be compensated, and is configured to detect an output current and an output voltage of the storage battery to be compensated, and determine whether the storage battery to be compensated is in a power shortage state according to the output current and the output voltage of the storage battery to be compensated; the voltage converter 130 is connected to the battery to be recharged and the power battery 110, and is configured to convert a first voltage output by the power battery 110 into a second voltage, where the first voltage is greater than the second voltage; the direct current relay 140 is connected between the storage battery to be compensated and the power battery 110 through a single passage; the battery manager 150 is connected to the dc relay 140, the voltage converter 130 and the electric quantity accumulation calculating module 120, and is configured to control the dc relay 140 to pull in through a single path when the battery to be compensated is in a power-deficient state, so that the voltage converting circuit including the dc relay 140 and the voltage converter 130 is turned on, and the voltage converter 130 converts the first voltage output by the power battery 110 into a second voltage to compensate the battery to be compensated.
As an embodiment, the voltage converter 130 is connected to the battery to be compensated, and may be: as shown in fig. 5, the voltage converter 130 is directly connected to the battery to be compensated, so that the voltage converter 130 can input the second voltage to the battery to be compensated.
As another embodiment, the voltage converter 130 is connected to the battery to be compensated, and may further be: as shown in fig. 4, the voltage converter 130 is connected to the electric quantity accumulation calculating module 120, and the electric quantity accumulation calculating module 120 is connected to the battery to be compensated, so that the voltage converter 130 is connected to the battery to be compensated, and the voltage converter 130 can input a second voltage to the battery to be compensated.
As an embodiment, the voltage converter 130 is connected to the power battery 110, and may be: as shown in fig. 5, the voltage converter 130 is directly connected to the power battery 110, so that the voltage converter 130 can convert the first voltage output by the power battery 110 into the second voltage. In this embodiment, the dc relay 140 is connected between the voltage converter 130 and the battery to be replenished through a separate path.
As another embodiment, the voltage converter 130 is connected to the power battery 110, and may further be: as shown in fig. 4, the voltage converter 130 and the dc relay 140 are connected through a single path, and the dc relay 140 and the power battery 110 are connected through a single path, so that the voltage converter 130 and the power battery 110 are connected, and the voltage converter 130 can convert the first voltage output from the power battery 110 into the second voltage. In this embodiment, the dc relay 140 is connected between the voltage converter 130 and the power battery 110 through a separate path.
In the embodiment of the present application, the battery manager 150 is connected to the dc relay 140, the voltage converter 130, and the electric quantity accumulation calculating module 120, and may be: as shown in fig. 4, the battery manager 150 is connected to the dc relay 140 through a separate path by a connection line such as a wire; battery manager 150 is connected to CAN communication line 152, and CAN communication line 152 is connected to voltage converter 130, thereby connecting battery manager 150 to voltage converter 130; and the battery manager 150 is connected to the LIN communication line 151, and the LIN communication line 151 is connected to the electricity amount accumulation calculation module 120, thereby connecting the battery manager 150 to the electricity amount accumulation calculation module 120.
In an exemplary embodiment, as shown in fig. 6, the power battery 110 and the battery manager 150 may also be respectively connected with a high voltage relay 160, wherein the high voltage relay 160 may be connected with other high voltage loads in the vehicle that need to use the power battery 110 as a power source, and is used for conducting a circuit including the power battery 110, the high voltage relay 160 and other high voltage loads.
The battery recharging system 100 in the exemplary embodiment may be configured to perform the above-mentioned battery recharging method, as an alternative embodiment, the above-mentioned battery recharging method is used in a vehicle sleep state, when the battery to be recharged is in a power-deficient state, the battery manager 150 controls the direct current relay 140 to be switched on only through a single path, does not control the high voltage relay 160 to be switched on, and enables the high voltage relay 160 to be in a release state, and circuits including the power battery 110, the high voltage relay 160 and other high voltage loads are kept in an off state. The circuit where the voltage converter 130 is located is independently controlled by the direct current relay 140, and when the storage battery to be supplemented is supplemented, only the voltage converter 130 is started, so that other high-voltage loads are prevented from being started when the vehicle is in a dormant state and other high-voltage loads are not needed, and energy consumption of the storage battery during power supplement is saved.
In an exemplary embodiment, as shown in fig. 6, the voltage converter 130 and the battery manager 150 may be further connected to a low voltage relay 170, respectively, wherein the low voltage relay 170 may be connected to other low voltage loads in the vehicle that need to use a low voltage, and used to conduct a circuit including the voltage converter 130, the low voltage relay 170, and the other low voltage loads.
The battery recharging system 100 in the exemplary embodiment may be configured to perform the above-mentioned battery recharging method, as an alternative embodiment, the above-mentioned battery recharging method is used in a vehicle sleep state, when the battery to be recharged is in a power-shortage state, the battery manager 150 controls the direct current relay 140 to be attracted only through a single path, does not control the low voltage relay 170 to be attracted, and enables the low voltage relay 170 to be in a release state, and the circuit including the voltage converter 130, the low voltage relay 170 and other low voltage loads maintains an open state. Through controlling the circuit where the storage battery to be supplemented is located independently, when the storage battery to be supplemented is supplemented, other low-voltage loads are prevented from being started when the vehicle is in a dormant state and other low-voltage loads are not needed, and therefore energy consumption of the storage battery during power supplement is saved.
In the storage battery power supplementing system 100, a power battery 110 is used for providing a first voltage, an electric quantity accumulation calculating module 120 is connected with a storage battery to be supplemented, a voltage converter 130 is connected with the storage battery to be supplemented and the power battery 110 respectively, a direct current relay 140 is connected between the storage battery to be supplemented and the power battery 110 through a single passage, and a battery manager 150 is connected with the direct current relay 140, the voltage converter 130 and the electric quantity accumulation calculating module 120 respectively.
When the storage battery electricity supplementing system 100 is used for supplementing electricity to a storage battery to be supplemented, other equipment in the storage battery electricity supplementing system 100 is controlled by the battery manager 150, a Vehicle Control Unit (VCU) and other controllers are not needed, energy needed by each equipment in the storage battery electricity supplementing system 100 is consumed, and energy needed by the Vehicle Control Unit (VCU) and other controllers in a traditional storage battery electricity supplementing method is not needed, so that the storage battery electricity supplementing system 100 provided by the application can reduce energy consumed when the storage battery is supplemented, and the problem of high energy consumption when the storage battery is supplemented is solved.
Referring to fig. 7, fig. 7 is a schematic view of a vehicle according to an embodiment of the present disclosure. The vehicle 200 may include a vehicle body and the battery charging system in the above embodiment.
In an exemplary embodiment, the vehicle may further include a lamp 210, and the battery to be recharged may be used to provide power to a low voltage load such as the lamp 210.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. The storage battery power supplementing method is applied to a storage battery power supplementing system, the storage battery power supplementing system comprises an electric quantity accumulation calculating module, a voltage converter, a direct current relay, a battery manager and a power battery, and the method comprises the following steps:
the electric quantity accumulation calculation module detects the output current and the output voltage of the storage battery to be compensated and determines whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated;
when the storage battery to be compensated is in a power-lack state, the battery manager controls the direct current relay to be attracted through an independent channel so as to conduct a voltage conversion circuit comprising the power battery, the direct current relay and the voltage converter;
and the voltage converter converts the first voltage output by the power battery into a second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, wherein the first voltage is greater than the second voltage.
2. The method according to claim 1, wherein before the battery manager controls the direct current relay to pull in through a single path when the battery to be compensated is in a power-lack state, the method further comprises:
when the electric quantity accumulation calculation module determines that the storage battery to be compensated is in a power shortage state, a first awakening instruction is sent to the battery manager so as to awaken the battery manager;
the electric quantity accumulation calculation module sends a power supplementing instruction to the battery manager so that the battery manager confirms that the storage battery to be supplemented is in a power shortage state when receiving the power supplementing instruction;
before the voltage converter converts the first voltage output by the power battery into the second voltage to supplement the power to the storage battery to be supplemented under the pull-in state of the direct current relay, the method further comprises the following steps:
and the battery manager sends a second awakening instruction to the voltage converter when the storage battery to be supplemented is in a power-lack state so as to awaken the voltage converter.
3. The method according to claim 1, wherein after the voltage converter converts the first voltage output by the power battery into the second voltage to replenish the battery to be replenished in the pull-in state of the dc relay, the method further comprises:
the electric quantity accumulation calculation module detects the input current and the input voltage of the storage battery to be compensated and determines whether the storage battery to be compensated meets the condition of stopping power compensation or not according to the input current and the input voltage of the storage battery to be compensated;
and when the storage battery to be compensated meets the condition of stopping power compensation, the battery manager controls the release of the direct current relay through an independent channel so that the power battery stops compensating the storage battery to be compensated.
4. The method according to claim 3, wherein the battery manager further comprises, before controlling the release of the DC relay through a separate path when the battery to be recharged satisfies the condition of stopping recharging:
when determining that the storage battery to be charged meets the charging stopping condition, the electric quantity accumulation calculation module sends a charging stopping instruction to the battery manager, so that when receiving the charging stopping instruction, the battery manager determines that the storage battery to be charged meets the charging stopping condition;
when the battery manager determines that the storage battery to be charged meets the condition of stopping charging, the battery manager sends a sleep instruction to the voltage converter so that the voltage converter enters a sleep state;
when the storage battery to be compensated meets the condition of stopping power compensation, the battery manager controls the release of the direct current relay through an independent path, and the battery manager further comprises:
the battery manager enters a sleep state.
5. The method according to claim 3, wherein the determining whether the electric storage battery to be compensated is in a power-deficient state according to the output current and the output voltage of the electric storage battery to be compensated comprises:
according to output current and output voltage of waiting to mend electric battery obtain wait to mend the output electric charge volume of electric battery, confirm whether the output electric charge volume of waiting to mend electric battery is not less than first preset threshold value, if the output electric charge volume of waiting to mend electric battery is not less than first preset threshold value, then wait to mend the electric battery and be in insufficient voltage state, if the output electric charge volume of waiting to mend the electric battery is less than first preset threshold value, then wait to mend the electric battery and not be in insufficient voltage state.
6. The method according to claim 5, wherein the determining whether the electric storage battery to be compensated meets a stop-compensation condition according to the input current and the input voltage of the electric storage battery to be compensated comprises:
the method comprises the steps of obtaining the input charge quantity of a battery to be compensated according to the input current and the input voltage of the battery to be compensated, determining whether the input charge quantity of the battery to be compensated is not smaller than the output charge quantity of the battery to be compensated, if the input charge quantity of the battery to be compensated is not smaller than the output charge quantity of the battery to be compensated, the battery to be compensated meets the condition of stopping power compensation, and if the input charge quantity of the battery to be compensated is smaller than the output charge quantity of the battery to be compensated, the battery to be compensated does not meet the condition of stopping power compensation.
7. The method according to claim 1, wherein before the battery manager controls the pull-in of the dc relay through a single path when the battery to be compensated is in a power-deficient state, the method further comprises:
the electric quantity accumulation calculation module detects the output current and the output voltage of the power battery and determines whether the power battery meets the power supply condition or not according to the output current and the output voltage of the power battery;
the battery manager is in when waiting to mend electric battery and being in insufficient voltage state, through independent access control direct current relay actuation includes:
the battery manager is in the battery that awaits making up is in insufficient voltage state, just power battery satisfies during the power supply condition, through independent access control direct current relay actuation.
8. The method of claim 7, wherein the determining whether the power cell satisfies a power supply condition based on the output current and the output voltage of the power cell comprises:
obtaining the output charge quantity of the power battery according to the output current and the output voltage of the power battery, determining whether the output charge quantity of the power battery is smaller than a second preset threshold value, if the output charge quantity of the power battery is smaller than the second preset threshold value, the power battery meets the power supply condition, and if the output charge quantity of the power battery is not smaller than the second preset threshold value, the power battery does not meet the power supply condition.
9. A battery recharging system, comprising:
a power battery for providing a first voltage;
the electric quantity accumulation calculation module is connected with the storage battery to be compensated and is used for detecting the output current and the output voltage of the storage battery to be compensated and determining whether the storage battery to be compensated is in a power shortage state or not according to the output current and the output voltage of the storage battery to be compensated;
the voltage converter is respectively connected with the storage battery to be compensated and the power battery and is used for converting a first voltage output by the power battery into a second voltage, wherein the first voltage is greater than the second voltage;
the direct current relay is connected between the storage battery to be compensated and the power battery through an independent passage; and
the battery manager, the battery manager with direct current relay, voltage converter and electric quantity are accumulated and are calculated the module and be connected respectively, are used for waiting to mend electric battery and pass through independent access control when being in insufficient voltage state direct current relay actuation makes including power battery, direct current relay and voltage converter's voltage conversion circuit switches on, and makes voltage converter will power battery output first voltage convert into second voltage is in order to right wait to mend electric battery and mend the electricity.
10. A vehicle characterized by comprising a vehicle body and the battery charging system according to claim 9.
CN202110751285.2A 2021-07-02 2021-07-02 Storage battery power supplementing method and system and vehicle Pending CN113352940A (en)

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