CN118457246A

CN118457246A - Battery management method, system, vehicle and medium

Info

Publication number: CN118457246A
Application number: CN202410770675.8A
Authority: CN
Inventors: 关成发; 廖治强
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2024-06-14
Filing date: 2024-06-14
Publication date: 2024-08-09

Abstract

The invention relates to a battery management method, a system, a vehicle and a medium, wherein the method comprises the following steps: under the condition that the vehicle is in a power-down state, collecting the current of a battery of the vehicle according to a preset collecting period as a target current, and adding 1 to a first counter; under the condition that the current collected target current is larger than a preset current threshold value, adding 1 to a second counter; under the condition that the current collected target current is not greater than the preset current threshold value, resetting the count value of the second counter; when the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value, sending a power-on signal and a power-on request to the control unit; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received. The cost of monitoring the power consumption in the vehicle sleep state is reduced.

Description

Battery management method, system, vehicle and medium

Technical Field

The invention relates to the technical field of automobiles, in particular to a battery management method, a system, a vehicle and a medium.

Background

With the development of automobile technology, many new energy automobiles, including pure electric automobiles, hybrid electric automobiles, and other new energy automobiles, are currently developed. For electric vehicles such as pure electric vehicles and hybrid electric vehicles, the battery state of the vehicle is closely related to the normal operation of the whole vehicle, so that the battery electric quantity of the vehicle needs to be monitored, particularly in the vehicle dormant state, the electric quantity consumption of the vehicle needs to be monitored in time, and the normal use of a user is not influenced.

At present, the electric quantity consumption of the vehicle in the dormant state is often monitored in real time through a coulombmeter so as to timely supplement electricity for the vehicle, however, the production process of the coulombmeter is difficult, and the cost for monitoring the electric quantity consumption of the vehicle in the dormant state by adopting the coulombmeter is high.

Disclosure of Invention

The invention aims to provide a battery management method, a system, a vehicle and a medium, which are used for solving the problem of higher cost for monitoring electric quantity consumption in a vehicle dormant state in the prior art.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

A battery management method, the method is applied to an acquisition unit in a battery management system, the battery management system is applied to a vehicle, and the battery management system further comprises a control unit; the method comprises the following steps:

under the condition that the vehicle is in a power-down state, collecting the current of a battery of the vehicle according to a preset collecting period as a target current, and adding 1 to a first counter;

Under the condition that the current collected target current is larger than a preset current threshold value, adding 1 to a second counter; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter;

When the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value, sending a power-on signal and a power-on request to the control unit; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received.

A battery management method, the method is applied to a control unit in a battery management system, the battery management system is applied to a vehicle, and the battery management system further comprises an acquisition unit; the method comprises the following steps:

Starting under the condition of receiving a power-on signal, and supplementing electricity to a battery of the vehicle under the condition of receiving a power-on request;

the power-on signal and the power-on request are sent by the acquisition unit when the current count value of the first counter reaches a first preset threshold value or when the current count value of the second counter reaches a second preset threshold value;

the acquisition unit is used for acquiring the current of the battery of the vehicle as a target current according to a preset acquisition period under the condition that the vehicle is in a power-down state, and adding 1 to the first counter; under the condition that the current collected target current is larger than a preset current threshold value, adding 1 to the second counter; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter.

A battery management system applied to a vehicle, the system comprising an acquisition unit and a control unit;

the acquisition unit is used for acquiring the current of the battery of the vehicle as a target current according to a preset acquisition period under the condition that the vehicle is in a power-down state, and adding 1 to a first counter;

the acquisition unit is used for enabling the second counter to be increased by 1 under the condition that the current acquired target current is larger than a preset current threshold value; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter;

The acquisition unit is used for sending a power-on signal and a power-on request to the control unit when the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value;

The control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received.

A vehicle for performing the above battery management method.

A storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the above battery management method.

The invention has the beneficial effects that:

In the embodiment of the invention, under the condition that the vehicle is in a power-down state, collecting the current of a battery of the vehicle according to a preset collecting period as a target current, and adding 1 to a first counter; under the condition that the current collected target current is larger than a preset current threshold value, adding 1 to a second counter; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter; when the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value, sending a power-on signal and a power-on request to the control unit; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received. In the embodiment of the invention, the battery management system comprising the acquisition unit and the control unit is arranged, so that the acquisition unit only needs to acquire the current of the battery, and the acquisition unit wakes the control unit to supplement electricity, thereby realizing the control and drive separation of battery management, facilitating the remote upgrade of the control unit through an Over-the-Air Technology (OTA), enabling the battery management system to be more adaptive to the whole vehicle OTA, and improving the flexibility and the rapidity. Meanwhile, the embodiment of the invention can monitor the electric quantity consumption in the vehicle dormant state through the first counter and the second counter, and wake the control unit to timely supplement electricity when the count value reaches the preset threshold value, so that a coulomb meter is not required to be configured for a vehicle battery, and the cost for monitoring the electric quantity consumption in the vehicle dormant state is greatly reduced.

Drawings

Fig. 1 is a flowchart illustrating steps of a battery management method according to an embodiment of the present invention;

FIG. 2 is a block diagram of a related art battery management system;

Fig. 3 is a schematic diagram of a battery management system according to an embodiment of the present invention;

Fig. 4 is a flowchart of a battery management method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another battery management method according to an embodiment of the present invention;

FIG. 6 is a flowchart of another battery management method according to an embodiment of the present invention;

FIG. 7 is a flowchart of another battery management method according to an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a battery management system according to an embodiment of the present invention;

Fig. 9 is a block diagram of a battery management device according to an embodiment of the present invention;

Fig. 10 is a block diagram of another battery management apparatus according to an embodiment of the present invention.

Detailed Description

Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

Fig. 1 is a flowchart of steps of a battery management method according to an embodiment of the present invention, where the method may be applied to an acquisition unit in a battery management system, where the battery management system may be applied to a vehicle, and the battery management system further includes a control unit, and as shown in fig. 1, the method may include the following steps:

and step 101, under the condition that the vehicle is in a power-down state, collecting the current of the battery of the vehicle according to a preset collecting period as a target current, and adding 1 to a first counter.

Step 102, adding 1 to a second counter under the condition that the current collected target current is larger than a preset current threshold value; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter.

Step 103, when the current count value of the first counter reaches a first preset threshold value, or when the current count value of the second counter reaches a second preset threshold value, sending a power-on signal and a power-on request to the control unit; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received.

The vehicle in the embodiment of the invention can be an electric automobile, correspondingly, the battery of the vehicle refers to a battery for providing a power source for the vehicle, the battery can be a storage battery or a lithium battery, and different batteries can be arranged according to the actual condition of the vehicle. Under the condition, the battery of the vehicle can be a low-voltage lithium battery, and compared with a common lead-acid battery, the low-voltage lithium battery is smaller in size, lighter in weight and higher in durability, so that the occupied space in the electric vehicle is smaller, and the weight reduction of the vehicle is further realized. Meanwhile, as the electrolyte of the low-voltage lithium battery generally adopts lithium iron phosphate, the energy density is higher, the activity is higher, the temperature is also more sensitive, the discharge capacity is also higher, and the transient electricity demand of the vehicle can be met by adopting the low-voltage lithium battery with lower capacity, so that the electric quantity monitoring of the low-voltage lithium battery with lower capacity is more important.

The battery management system may include a collection unit and a control unit, where the collection unit may be used to collect parameters such as current and voltage of the battery, and the collection unit may be disposed inside the battery. The control unit refers to a unit for calculating the present current of the battery, and may be provided in any one of the controllers of the vehicle, or may be a separate vehicle controller, to which the embodiment of the present invention is not limited. Further, the collecting unit and the control unit may communicate through a vehicle bus, where the vehicle bus may be a controller area network bus (Controller Area Network, CAN) or an ethernet bus, and the embodiment of the present invention is not limited thereto.

The above-mentioned power-down state refers to a dormant state of the vehicle, that is, a state after an electric door (ignition switch) of the vehicle is closed, where the power-down state is often that after a user extinguishes, a power-down signal is sent to each component of the vehicle by the vehicle controller, so that the vehicle enters the dormant state. Further, when the vehicle is in a powered-down state, there are some components or systems that are not fully powered down (e.g., a key detection system, an anti-theft system, etc.), but are in a low power consumption state, where the battery of the vehicle needs to provide power to the components or systems in the low power consumption state, resulting in a discharge current that is still generated by the battery of the vehicle in the vehicle sleep state. The current generated when the vehicle is in the powered-down state may be referred to as dark current, static current, leakage current, or the like.

The acquisition period may be preset, may be 5s, 10s, or 1h, 30min, etc., and may be set according to the capacity of the battery of the vehicle, which is not limited in the embodiment of the present invention. The first counter and the second counter may be created in advance in the acquisition unit.

Specifically, the collecting unit may collect, according to a preset collecting period, a current of a battery of the vehicle as a target current after each collecting period passes, and increment the first counter by 1. At this time, the collected target current is the current dark current of the vehicle battery, and the count value of the first counter can represent the duration of the vehicle in the power-down state to a certain extent.

The preset current threshold value refers to a dark current upper limit value when the vehicle and the battery are not abnormal, and the dark current upper limit value can be obtained by calibrating the vehicle in advance. Further, when the current collected target current is larger than the preset current threshold, the current dark current is excessively large, the vehicle or the battery may be abnormal, the battery power consumption is large, and the embodiment of the invention can enable the second counter to be increased by 1. Accordingly, when the currently acquired target current is not greater than the preset current threshold, the count value of the second counter may be cleared. It can be appreciated that, through the above operation, the count value of the second counter may characterize the number of times that the abnormal dark current is continuously collected in the vehicle sleep state. Specifically, since there may be a situation in which the current accidentally fluctuates due to a collection failure or other system components, in order to avoid a determination error caused by such a situation, the embodiment of the present invention may determine the number of times that an abnormal dark current is continuously collected in the vehicle sleep state by the count value of the second counter.

The first preset threshold value and the second preset threshold value may be obtained by calibrating the vehicle battery in advance. The first preset threshold value refers to the number of times that the acquisition unit can acquire according to a preset acquisition period in the process that the electric quantity of the battery is reduced from the upper limit value to the lower limit value in the dormant state of the vehicle. The second preset threshold refers to a threshold of times of continuously collecting the abnormal dark current, and may be that when the number of times of continuously collecting the abnormal dark current reaches the second preset threshold in the dormant state of the vehicle, the electric quantity of the battery is reduced from an upper electric quantity limit value to a lower electric quantity limit value.

Further, when the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value, the electric quantity of the battery of the vehicle is often lower, and the battery needs to be charged in time, so that the whole vehicle use of the vehicle is prevented from being influenced. At this time, the power-on signal and the power-on request may be sent to the control unit, and accordingly, the control unit is started when receiving the power-on signal, and supplements power to the battery of the vehicle when receiving the power-on request.

Specifically, the power-on signal and the power-on request may be sent to the control unit through a vehicle bus, and the power-on signal may be a high-level signal. The control unit can keep dormant all the time when the vehicle is in a power-down state, and is awakened when a power-up signal is received. Further, the power supplementing operation can be performed by controlling a power supply (such as an inductive energy storage DC-DC converter) of the vehicle to supplement power for a battery of the vehicle.

Optionally, the embodiment of the invention specifically may further include:

Under the condition that the vehicle is in a power-on state, acquiring the electric parameters of the battery and transmitting the electric parameters to the control unit; the electrical parameter includes an electrical current;

the control unit is used for updating the current electric quantity of the battery based on the current electric quantity of the battery and the received current.

The power-on state refers to a state that the vehicle is started, and when the vehicle is in the power-on state, the acquisition unit can acquire electric parameters of a battery of the vehicle, wherein the electric parameters can comprise current. At the same time, the acquisition unit may transmit the electrical parameters to the control unit. Accordingly, the control unit may update the current charge of the battery based on the current of the battery and the received current. When the control unit receives the power-on signal of the acquisition unit or the power-on signal of the whole vehicle, the vehicle can be in a power-on state.

Specifically, the current includes a charging current and a discharging current, the charging current may be a positive number, and the discharging current may be a negative number. Specifically, the collection unit may be provided with an operational amplifier circuit for collecting the electrical parameters, which may be a differential amplifier circuit, which is not limited in the embodiment of the present invention. In particular, the above-mentioned electrical parameters may also be transmitted to the control unit via the vehicle bus.

Further, the control unit may calculate the current power by ampere-hour integration. Specifically, the current electric quantity soc=soc+Δ, where Δ=i×t, where I is the current received by the control unit, the charging current is positive, the discharging current is negative, and t is the signal transmission period, which is related to the delay performance of the vehicle bus, and the t may be obtained by pre-calibrating the vehicle. Further, the above operation may be performed in real time, so when the vehicle is started for the first time, the SOC may be an SOC, which refers to an amount of electricity of the vehicle battery when the vehicle battery is first loaded, and is often the total capacity of the battery when the battery leaves the factory.

In the embodiment of the invention, under the condition that the vehicle is in a power-on state, the electric parameters of the battery are collected and transmitted to the control unit; the electrical parameter includes an electrical current; the control unit is used for updating the current electric quantity of the battery based on the current electric quantity of the battery and the received current. According to the embodiment of the invention, the acquisition unit and the control unit are arranged, the acquisition unit acquires the electric parameters of the battery, and the control unit updates the current electric quantity of the battery based on the electric parameters, so that the acquisition unit only serves as a data acquisition sensor to execute data acquisition operation, and the control unit only executes electric quantity calculation operation, thereby realizing control and drive separation.

Meanwhile, the acquisition unit does not need to execute calculation operation, so that the acquisition unit only needs to adopt a master control chip with lower performance, a coulombmeter and the master control chip with higher performance are not required to be arranged, the calculation force of the master control chip is reduced, the hardware structure is simplified, and the hardware cost and the software design difficulty are reduced.

Fig. 2 is a schematic diagram of a battery management system according to a related art, and fig. 3 is a schematic diagram of a battery management system according to an embodiment of the present invention, where, as shown in fig. 2 and 3, the battery management system includes a high-performance main control module, a current divider, an electronic switch, and a coulometer, and the high-performance main control module is used for executing a related logic algorithm. The battery management system provided by the embodiment of the invention comprises an acquisition unit and a control unit, wherein the acquisition unit comprises a low-performance (low-end) main control module, a shunt and an electronic switch, and the control unit is used for executing a related logic algorithm. Further, the low-performance main control module can comprise a low-performance main control chip, an electronic switch driving chip, an operational amplifier, a communication transceiver chip and the like, and the low-performance main control module is used for acquiring the electrical parameters and communicating with the control unit.

Optionally, in an embodiment of the present invention, the control unit is further configured to determine, when a power-up signal is received, a power consumption of the vehicle based on a dark current reference value and a current count value of the first counter, and determine a current power of the battery based on an initial power of the vehicle before power-down and the power consumption.

The initial electric quantity before the vehicle is powered down refers to the current electric quantity before the vehicle is powered down. The dark current reference value refers to a dark current average value of an abnormal condition of the vehicle in a dormant state, the current count value of the first counter refers to a count value of the first counter when the collecting unit sends a power-on signal, the control unit can communicate with the collecting unit after receiving the power-on signal and being awakened, and the collecting unit can actively send the current count value of the first counter to the control unit or can be actively obtained by the control unit. Further, the reference value of the dark electricity may be obtained by calibrating the vehicle in advance.

Specifically, since the first counter is added with 1 according to a preset acquisition period, the sleep time of the vehicle can be determined to a certain extent through the current count value and the acquisition period of the first counter, and accordingly, the dark current reference value can represent the unit consumption current reference value of the vehicle in the power-down process, so that the electric quantity consumed by the vehicle in the power-down process can be obtained through the current value, the acquisition period and the dark current reference value of the first counter. Accordingly, the current charge of the battery can be obtained by subtracting the consumed charge from the initial charge.

For example, taking the initial power before power-down as SOC1, the current count value of the first counter as D, the acquisition period as T1, and the dark current reference value as i as an example, the current power-down soc=soc 1-i×t1×d may be obtained.

Optionally, fig. 4 is a flowchart of a battery management method provided by an embodiment of the present invention, and fig. 5 is a flowchart of another battery management method provided by an embodiment of the present invention, as shown in fig. 4, a dark current average value i of a whole vehicle in a normal power-down state may be obtained through front calibration of the whole vehicle, and a dark current threshold value standard i' of the whole vehicle in an abnormal state may be agreed through calibration of the whole vehicle. Wherein i' corresponds to the preset current threshold, and i corresponds to the dark current reference. Further, after the whole vehicle is powered down, the acquisition unit wakes up periodically by taking T1 as an acquisition period, and an operational amplifier chip in the acquisition unit is adopted to acquire the current dark current, namely the target current. Judging whether the collected dark current is larger than the threshold standard i ', and when the collected dark current is larger than the threshold standard i', adding 1 to the internal counter 2, and adding 1 to the counter 1. Accordingly, when smaller, the internal counter 2 is cleared, and the counter 1 is incremented by 1. Wherein the internal counter 2 corresponds to the second counter above and the counter 1 corresponds to the first counter above.

Further, as shown in fig. 4, B in fig. 4 corresponds to the second preset threshold, and when the counter 2 is greater than B, the collecting unit wakes up the control unit and applies for intelligent power-up, that is, sends a power-up signal and a power-up request to the control unit. Further, as shown in fig. 5, C in fig. 5 corresponds to the first preset threshold, and is also obtained by calibrating the whole vehicle in the front period, or may be obtained by taking the number of times that the acquisition unit can periodically wake up according to T1 as C when the initial capacity SOC' reaches the lower limit of the battery power under the condition that the number of times that the whole vehicle continuously acquires the abnormal dark current does not trigger the second preset threshold. Further, when the second counter is always smaller than B, if the first counter reaches C, the control unit may be awakened and intelligent power supply may be applied.

In the embodiment of the invention, the control unit is further configured to determine, when receiving the power-on signal, the current electric quantity of the battery based on the initial electric quantity before the vehicle is powered down, the dark current reference value and the current count value of the first counter. Therefore, the electric quantity consumed by the vehicle in the power-down state can be obtained through the current count value of the first counter and the dark current reference value, and then the current electric quantity of the vehicle battery when the power-up signal is received can be obtained through the initial electric quantity before power-down and the consumed electric quantity. The problem that the control unit cannot update the current electric quantity of the battery due to the fact that the vehicle is powered down is avoided.

Optionally, the electrical parameter further comprises a voltage, and the control unit is further configured to: and under the condition that the received voltage reaches the preset voltage threshold of the battery, if the current electric quantity of the battery is inconsistent with the preset electric quantity threshold corresponding to the preset voltage threshold, updating the current electric quantity of the battery into the preset electric quantity threshold.

The preset voltage threshold refers to an upper limit value of the battery voltage, the preset electric quantity threshold refers to an upper limit value of the electric quantity of the battery, and the preset voltage threshold corresponds to the preset electric quantity threshold.

Further, when the received voltage reaches the preset voltage threshold, it indicates that the battery capacity of the vehicle is always full at the moment, at this moment, the current capacity of the battery should be consistent with the preset capacity threshold, if the current capacity and the preset capacity threshold are inconsistent, it indicates that an error exists in calculation of the current capacity, at this moment, precision correction is needed, and the control unit can directly update the current capacity to the preset capacity threshold.

Optionally, the control unit is used for controlling the power supply of the vehicle to output voltage according to a target voltage threshold value under the condition that the power supply supplementing request is received, so as to charge the battery; the control unit is further configured to: and after the current electric quantity of the battery is updated to the preset electric quantity threshold value, controlling a power supply of the vehicle to output voltage according to the preset voltage threshold value.

The power supply refers to DC/DC of the vehicle, and the target voltage threshold may be obtained by calibration in advance, and may be a charging voltage threshold that has high charging efficiency and is satisfied by the power supply. Under the condition that the target voltage threshold may be higher than the working voltage of the power supply, for example, the working voltage of the DC/DC of the whole vehicle is generally 14.5V, the target voltage threshold E may be 15V, or other target voltage thresholds may be obtained by calibrating according to the actual situation of the vehicle, which is not limited in the embodiment of the present invention.

Specifically, the control unit may initiate a voltage output request to the power supply, so that the power supply outputs a voltage to the battery. Further, upon receiving the power replenishment request, the power supply may be controlled to output a voltage in accordance with the target voltage threshold to rapidly charge the battery. Meanwhile, when the current of the battery is updated to a preset electric quantity threshold value, the battery is always full, and the control unit can output voltage according to the preset voltage threshold value.

Further, in the embodiment of the present invention, when the vehicle is in a power-on state, count values of the first counter and the second counter are cleared. The collection unit is convenient to monitor the electricity consumption during the power-down state when the vehicle enters the power-down state again.

Optionally, the preset current threshold, the first preset threshold and the second preset threshold are all obtained by calibrating the vehicle in advance.

Optionally, in the embodiment of the present invention, after updating the current electric quantity of the battery to the preset electric quantity threshold, if the control unit is started based on the power-up signal sent by the acquisition unit, the control unit may send a power-down signal to the vehicle bus, so that the vehicle power supply is powered down, the power-up operation is stopped, and the vehicle enters the sleep state again.

Fig. 6 is a flowchart illustrating another battery management method according to an embodiment of the present invention. As shown in fig. 6, the upper limit holding voltage a in fig. 6 corresponds to the preset voltage threshold in the above, and the SOC' corresponds to the preset power threshold in the above, which can be obtained by whole vehicle front calibration. After the control unit is awakened to apply for intelligent power supply, the DC/DC is electrified and outputs voltage by using power supply voltage E (corresponding to a target voltage threshold), meanwhile, counters 1 and 2 of the acquisition unit are cleared, the acquisition unit sends electric parameters (including current and voltage) to the control unit, wherein the voltage refers to the cell voltage of the battery, and when the received cell voltage reaches A volts, the control unit corrects the current electric quantity to enable the current electric quantity to be equal to or less than SOC'. Further, the control unit applies for DC/DC power-down and goes to sleep again.

Fig. 7 is a flowchart of another battery management method according to an embodiment of the present invention, as shown in fig. 7, where the control unit may record the current power SOC1 as the initial power after power-up before the vehicle is powered down. In the vehicle power-down state, if the counter 2 is always smaller than B and the counter 1 is always smaller than C, when the control unit receives a wake-up signal (e.g., a key unlock signal) of the external device, the control unit actively wakes up and applies for the DC/DC output voltage E to supplement power. Meanwhile, the acquisition unit can transmit charge and discharge current and cell voltage acquired in real time to the control unit, and the control unit corrects the battery electric quantity for the first time, namely, updates the current electric quantity into SOC=SOC1-i.T1.D. When the voltage of the battery core received by the control unit reaches a preset voltage threshold value A volt, if the current electric quantity SOC is equal to the preset electric quantity threshold value SOC 'corresponding to the A volt at the moment, correcting again, and updating the current electric quantity to SOC equal to SOC'. Meanwhile, the output voltage of the whole DC/DC power supply can be requested to be regulated to be A volts, and the output of the DC/DC is kept at A volts before the next power-down. The capacity in the figure refers to the amount of electricity of the battery.

Optionally, the embodiment of the invention further provides a battery management method, which is applied to a control unit in a battery management system, wherein the battery management system is applied to a vehicle, and the battery management system further comprises an acquisition unit.

In summary, in the embodiment of the present invention, when the vehicle is in the power-down state, the current of the battery of the vehicle is collected according to the preset collection period, and is used as the target current, and the first counter is incremented by 1; under the condition that the current collected target current is larger than a preset current threshold value, adding 1 to a second counter; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter; when the current count value of the first counter reaches a first preset threshold value or the current count value of the second counter reaches a second preset threshold value, sending a power-on signal and a power-on request to the control unit; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received. In the embodiment of the invention, the battery management system comprising the acquisition unit and the control unit is arranged, so that the acquisition unit only needs to acquire the current of the battery, and the acquisition unit wakes the control unit to supplement electricity, thereby realizing the control and drive separation of battery management, facilitating the remote upgrade of the control unit through an Over-the-Air Technology (OTA), enabling the battery management system to be more adaptive to the whole vehicle OTA, and improving the flexibility and the rapidity. Meanwhile, the embodiment of the invention can monitor the electric quantity consumption in the vehicle dormant state through the first counter and the second counter, and wake the control unit to timely supplement electricity when the count value reaches the preset threshold value, so that a coulomb meter is not required to be configured for a vehicle battery, and the cost for monitoring the electric quantity consumption in the vehicle dormant state is greatly reduced.

Optionally, the embodiment of the invention also provides a battery management system, which is applied to a vehicle and comprises an acquisition unit and a control unit;

Optionally, fig. 8 is a schematic structural diagram of a battery management system according to an embodiment of the present invention, where, as shown in fig. 8, the battery management system is composed of a low-voltage lithium battery pack, an acquisition unit, a control unit, and a DC/DC power supply of the whole vehicle. The acquisition unit is integrated inside the low-voltage lithium battery pack to form a low-voltage lithium battery assembly. The positive pole pile head of the low-voltage lithium battery assembly is directly connected with the positive pole of the whole vehicle DC/DC power supply through a power wire harness. The bus connector of the low-voltage lithium battery assembly is connected with the bus connector of the control unit through twisted pairs, and the power section connector of the control unit is connected to the positive pole pile head of the low-voltage lithium battery assembly through a wire harness and a fuse box.

Optionally, the acquisition unit is used for acquiring the electrical parameter of the battery and transmitting the electrical parameter to the control unit when the vehicle is in a power-on state; the electrical parameter includes an electrical current;

Optionally, the control unit is further configured to determine, when a power-up signal is received, a power consumption of the vehicle based on a dark current reference value and a current count value of the first counter, and determine a current power of the battery based on an initial power before the power-down of the vehicle and the power consumption.

Optionally, the electrical parameter further comprises a voltage;

The control unit is further configured to: and under the condition that the received voltage reaches the preset voltage threshold of the battery, if the current electric quantity of the battery is inconsistent with the preset electric quantity threshold corresponding to the preset voltage threshold, updating the current electric quantity of the battery into the preset electric quantity threshold.

Optionally, the control unit is configured to control, when the power supply request is received, the power supply of the vehicle to output a voltage according to a target voltage threshold so as to charge the battery;

The control unit is further configured to: and after the current electric quantity of the battery is updated to the preset electric quantity threshold value, controlling a power supply of the vehicle to output voltage according to the preset voltage threshold value.

Optionally, the acquisition unit is configured to: and under the condition that the vehicle is in a power-on state, resetting the count values of the first counter and the second counter.

Fig. 9 is a block diagram of a battery management device according to an embodiment of the present invention, where the device is applied to an acquisition unit in a battery management system, and the battery management system is applied to a vehicle, and the battery management system further includes a control unit; as shown in fig. 9, the apparatus 20 includes:

a first collecting module 201, configured to collect, as a target current, a current of a battery of the vehicle according to a preset collecting period, and increment a first counter by 1, when the vehicle is in a powered-down state;

A counting module 202, configured to increment a second counter by 1 when the currently acquired target current is greater than a preset current threshold; and under the condition that the currently acquired target current is not greater than the preset current threshold value, resetting the count value of the second counter;

a sending module 203, configured to send a power-on signal and a power-up request to the control unit when the current count value of the first counter reaches a first preset threshold value, or when the current count value of the second counter reaches a second preset threshold value; the control unit is used for starting under the condition that the power-on signal is received, and supplementing electricity to the battery under the condition that the electricity supplementing request is received.

Optionally, the apparatus further comprises: the second acquisition module is used for acquiring the electric parameters of the battery and transmitting the electric parameters to the control unit under the condition that the vehicle is in a power-on state; the electrical parameter includes an electrical current;

Optionally, the electrical parameter further comprises a voltage;

Optionally, the apparatus further comprises:

And the zero clearing module is used for zero clearing the count values of the first counter and the second counter under the condition that the vehicle is in a power-on state.

Fig. 10 is a block diagram of another battery management device according to an embodiment of the present invention, where the device is applied to a control unit in a battery management system, the battery management system is applied to a vehicle, and the battery management system further includes an acquisition unit; as shown in fig. 10, the apparatus 30 includes:

the starting module 301 is configured to start when a power-on signal is received, and perform power-up on a battery of the vehicle when a power-up request is received;

Optionally, the apparatus further comprises:

the first updating module is used for updating the current electric quantity of the battery based on the current electric quantity of the battery and the received current;

the acquisition unit is used for acquiring the electric parameters of the battery and transmitting the electric parameters to the control unit under the condition that the vehicle is in a power-on state; the electrical parameter includes an electrical current.

Optionally, the apparatus further comprises:

and the consumption determining module is used for determining the consumption electric quantity of the vehicle based on a dark current reference value and the current count value of the first counter under the condition that a power-on signal is received, and determining the current electric quantity of the battery based on the initial electric quantity before the vehicle is powered down and the consumption electric quantity.

Optionally, the electrical parameter further comprises a voltage; the apparatus further comprises:

And the second updating module is used for updating the current electric quantity of the battery into the preset electric quantity threshold value if the current electric quantity of the battery is inconsistent with the preset electric quantity threshold value corresponding to the preset voltage threshold value under the condition that the received voltage reaches the preset voltage threshold value of the battery.

Optionally, the apparatus further comprises:

the power supply module is used for controlling a power supply of the vehicle to output voltage according to a target voltage threshold value under the condition that the power supply request is received so as to charge the battery;

and the output module is used for controlling the power supply of the vehicle to output voltage according to the preset voltage threshold after the current electric quantity of the battery is updated to the preset electric quantity threshold.

Optionally, the collecting unit is further configured to zero the count values of the first counter and the second counter when the vehicle is in a power-on state.

The invention also provides a vehicle for executing the battery management method.

The present invention also provides a readable storage medium having stored thereon a computer program which when executed by a processor implements the aforementioned battery management method.

For an apparatus or system embodiment, the description is relatively simple as it is substantially similar to a method embodiment, as relevant to the description of the method embodiment.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. The required structure for a construction of such a system is apparent from the description above. In addition, the present invention is not directed to any particular programming language. It will be appreciated that the teachings of the present invention described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functions of some or all of the components in a sorting device according to the present invention may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present invention may also be implemented as an apparatus or device program for performing part or all of the methods described herein. Such a program embodying the present invention may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

It should be noted that, in the embodiment of the present invention, the related processes of obtaining various data are all performed under the premise of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.

The above embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention.

Claims

1. A battery management method, wherein the method is applied to an acquisition unit in a battery management system, the battery management system is applied to a vehicle, and the battery management system further comprises a control unit; the method comprises the following steps:

2. The method according to claim 1, wherein the method further comprises:

3. The method according to claim 1, wherein the control unit is further configured to determine, in the case of receiving a power-up signal, a consumed electric quantity of the vehicle based on a dark current reference value and a current count value of the first counter, and determine a current electric quantity of the battery based on an initial electric quantity before the vehicle is powered down and the consumed electric quantity.

4. The method of claim 2, wherein the electrical parameter further comprises a voltage;

5. The method according to claim 4, wherein the control unit is configured to control a power supply of the vehicle to output a voltage according to a target voltage threshold value to charge the battery in a case where the power-up request is received;

6. The method according to any one of claims 1-5, further comprising:

And under the condition that the vehicle is in a power-on state, resetting the count values of the first counter and the second counter.

7. The method of any one of claims 1-5, wherein the preset current threshold, the first preset threshold, and the second preset threshold are all pre-calibrated for the vehicle.

8. A battery management method, wherein the method is applied to a control unit in a battery management system, the battery management system is applied to a vehicle, and the battery management system further comprises an acquisition unit; the method comprises the following steps:

9. A battery management system, wherein the system is applied to a vehicle, and the system comprises an acquisition unit and a control unit;

10. A vehicle loaded with a battery management system according to claim 9, the vehicle being adapted to perform the method according to any one of claims 1-8.

11. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;

A memory for storing a computer program;

A processor for implementing the method of any of claims 1-8 when executing a program stored on a memory.

12. A storage medium having stored thereon a computer program, which when executed by a processor performs the method of any of claims 1-8.