CN113696735B - Power-up method of battery system, battery system and readable storage medium - Google Patents
Power-up method of battery system, battery system and readable storage medium Download PDFInfo
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- CN113696735B CN113696735B CN202110902986.1A CN202110902986A CN113696735B CN 113696735 B CN113696735 B CN 113696735B CN 202110902986 A CN202110902986 A CN 202110902986A CN 113696735 B CN113696735 B CN 113696735B
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Classifications
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
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- 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
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- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application discloses a power-on method of a battery system, the battery system and a readable storage medium, wherein the method comprises the following steps: receiving working state data of all the battery packs; judging whether the working state of the battery pack is normal or not according to the working state data; if the judging result is that the working state of the battery pack is normal, the number of the battery packs in the battery system is obtained; and determining a corresponding power-on strategy according to the number of the battery packs, and controlling the battery packs to be powered on according to the power-on strategy. The application can solve the problem of circulation when the parallel battery packs are electrified, and prolong the service life of the battery packs.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to a power-on method of a battery system, the battery system and a readable storage medium.
Background
In electric automobile, provide the electric energy through power battery to drive the vehicle and remove, current electric automobile market is more and more many more, and the customer has different range demands, in order to satisfy customer's demand, requires the battery package of multiple electric quantity of same model of vehicle development, in order to supply the user to select different battery packages according to self demand. The current parallel battery pack technology is that a plurality of battery packs are directly connected in parallel, and the scheme has the defects that the parallel battery packs have circulation problems when being electrified, and impact current can be generated in parallel instantly to influence the performance of a battery cell and reduce the service life of the battery pack.
Disclosure of Invention
The application provides a power-on method of a battery system, which aims to solve the problem of circulation when a parallel battery pack is powered on and prolong the service life of the battery pack.
In order to achieve the above object, the present application provides a power-up method of a battery system, comprising the steps of:
acquiring working state data of all the battery packs;
judging whether the working state of the battery pack is normal or not according to the working state data;
if the judging result is that the working state of the battery pack is normal, the number of the battery packs in the battery system is obtained;
and determining a corresponding power-on strategy according to the number of the battery packs, and controlling the battery packs to be powered on according to a preset power-on strategy so as to reduce or eliminate power-on circulation.
Optionally, if the number of battery packs in the battery system is one, executing a preset battery pack power-on strategy;
and if the number of the battery packs in the battery system is multiple, executing a preset multi-battery pack power-on strategy.
Optionally, if the number of the battery packs in the battery system is one, a power-up instruction is sent to control the battery packs to be powered up.
Optionally, if the number of the battery packs in the battery system is multiple, acquiring voltages of all the battery packs, and calculating a maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is smaller than a first preset difference value, sending a power-on instruction to control all the battery packs to be powered on.
Optionally, if the number of the battery packs in the battery system is multiple, acquiring voltages of all the battery packs, and calculating a maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is greater than or equal to a first preset difference value, controlling the battery pack to execute a charge-discharge strategy so as to reduce the battery pack voltage difference.
Optionally, if the maximum voltage difference is greater than or equal to the first preset difference, the battery pack with the largest control voltage is continuously discharged for a first preset duration, or the battery pack with the smallest control voltage is continuously charged for a second preset duration;
the method comprises the following steps: and judging whether the maximum voltage difference is smaller than a first preset difference value.
Optionally, acquiring a voltage value of the battery pack with the largest voltage value, and setting the voltage value as a maximum voltage value;
acquiring a voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
the difference between the maximum voltage value and the minimum voltage value is calculated to obtain the maximum voltage difference.
Optionally, the high voltage interlock status, temperature, voltage, resistance and relay status of the battery pack are obtained.
In order to achieve the above object, the present application also proposes a battery system including a battery pack, a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements a power-on method of the battery system.
To achieve the above object, the present application also proposes a readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of powering up the battery system.
In the technical scheme of the application, the working state data of all the battery packs are received, whether the working state of the battery packs is normal is judged according to the working state data, if the judging result is that the working state of the battery packs is normal, the number of the battery packs in the battery system is obtained, the corresponding power-on strategy is determined according to the number of the battery packs, and the battery packs are controlled to be powered on according to the power-on strategy. Therefore, whether a plurality of battery packs supply power can be determined and judged according to the number of the battery packs at the same time, and different power-on strategies are adopted for power-on according to the number of the battery packs, so that the problem of circulation when the battery packs are powered on can be avoided, and the service life of the battery packs is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a power-up method of a battery system according to an embodiment of the application;
FIG. 2 is a flowchart of a method of powering up a battery system according to an embodiment of the application;
fig. 3 is a flowchart of a power-up method of a battery system according to another embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a hardware structure of a battery system according to various embodiments of the present application. The battery system comprises an execution module 01, a memory 02, a processor 03 and the like. Those skilled in the art will appreciate that the battery system shown in fig. 1 may also include more or fewer components than shown, or may combine certain components, or may be arranged in different components. The processor 03 is connected to the memory 02 and the execution module 01, respectively, and a computer program is stored in the memory 02 and executed by the processor 03 at the same time.
The execution module 01 can receive a battery power-on instruction, send a state acquisition instruction, feed back the information and send the information to the processor 03.
The memory 02 is used for storing software programs and various data. The memory 02 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data or information, etc. created according to the use of the terminal. In addition, memory 02 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 03, which is a control center of the processing platform, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 02, and calling data stored in the memory 02, thereby performing overall monitoring of the automobile. The processor 03 may include one or more processing units; preferably, the processor 03 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application program, etc., and the modem processor mainly processes wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 03.
It will be appreciated by those skilled in the art that the battery system configuration shown in fig. 1 is not limiting of the battery pack and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
According to the above hardware structure, various embodiments of the method of the present application are presented.
Referring to fig. 2, in a first embodiment of a power-up method of a battery system of the present application, the power-up method of a battery system includes:
step S100, acquiring working state data of all the battery packs;
in this embodiment, the battery system is applied to an electric vehicle equipped with one power distribution unit, one battery control unit and a plurality of battery management units, wherein the battery control unit controls all the battery management units, and each battery management unit individually manages the operation of one battery pack and can collect real-time operation state data of the battery pack, such as the voltage, the temperature, the relay state, and the like of the battery pack at any time.
If the battery control unit needs to collect the working state data of the battery pack, an acquisition instruction is issued to the battery management unit, and the battery management unit collects the working state data of the corresponding battery pack according to the acquisition instruction and feeds the working state data back to the battery control unit. The acquiring instruction issued by the battery management unit may only acquire a certain item of data of the battery pack, for example, only acquire the temperature of the battery pack, only acquire the voltage of the battery pack, or may also simultaneously acquire a plurality of items of data of the battery pack, for example, simultaneously acquire the temperature, the voltage, the relay state, and the like of the battery pack.
Step S200, judging whether the working state of the battery pack is normal or not according to the working state data;
in this embodiment, after the battery control unit receives the operation state data of each battery pack, it may be determined whether the operation state of the battery pack is normal according to the operation state data of each battery pack. In one embodiment, the operational status data of the battery pack includes voltage status data, temperature status data, relay status data, and the like. The battery control unit can judge whether the voltage value of the battery pack is in a preset voltage threshold according to the voltage state data, if the voltage value is in the preset voltage threshold, the voltage of the battery pack is judged to be normal, and otherwise, the voltage of the battery pack is judged to be abnormal. The battery control unit can judge whether the temperature of the battery pack is in a preset temperature threshold according to the temperature state data, and if the temperature of the battery pack is in the preset temperature threshold, the battery pack is judged to be normal; otherwise, judging that the temperature of the battery pack is abnormal. The battery control unit can also judge whether the relay is adhered according to the state data of the relay, if the relay is not adhered, the relay is judged to be normal, and if the relay is adhered, the relay is judged to be abnormal. Wherein, the preset voltage threshold and the preset temperature threshold are preset by a person skilled in the art according to preset rules.
If the voltage, the temperature and the relay of the battery pack are all normal, the working state of the battery pack is judged to be normal, and if any one of the voltage, the temperature and the relay of the battery pack is abnormal, the working state of the battery pack is judged to be abnormal.
Step S300, if the judging result is that the working state of the battery pack is normal, the number of the battery packs in the battery system is obtained;
in this embodiment, by judging in advance whether the operation state of each battery pack is normal, the attenuation degree and the damage degree of each battery pack can be obtained, and the attenuation of the battery means that the amount of electricity that the battery can accommodate is reduced, for example, the original capacity of the battery is 50 degrees electricity, and the capacity becomes 40 degrees electricity after 20% attenuation. All batteries can be attenuated after being used, if the attenuation speed of the batteries is in a reasonable speed range, the attenuation belongs to normal attenuation, for example, the attenuation of the batteries of the electric vehicle in the first year of use is relatively large, for example, the attenuation is about 8 percent, the attenuation is about 4 percent in the following 2-3 years, the attenuation is about 1 percent year by year in 5-6 years, the degree can not greatly influence the normal operation of the batteries, and if the attenuation speed of the batteries is relatively high, for example, the attenuation is over 20 percent in the first year of use, the attenuation belongs to abnormal attenuation, and the normal operation of the batteries can be greatly influenced. If the judging result of the battery control unit is that the working states of all the battery packs are normal, the attenuation degree and the damage degree of all the battery packs are in a reasonable range, and the battery packs can still work normally; if the judging result of the battery control unit indicates that the working state of one or more battery packs is abnormal, the one or more battery packs are greatly attenuated or damaged, abnormal data information is sent to the whole vehicle controller of the vehicle, and the working of the one or more battery packs is suspended.
Step S400, determining a corresponding power-on strategy according to the number of the battery packs, and controlling the battery packs to be powered on according to a preset power-on strategy so as to reduce or eliminate power-on circulation.
In this embodiment, different numbers of battery packs correspond to different battery power-up strategies. For example, when the number of battery packs is one, then the battery packs are directly controlled to be powered on. When the number of the battery packs is multiple, the battery packs are connected in parallel, the battery control unit can control the battery packs to discharge sequentially according to the sequence from small to large in voltage value, and can also control the battery packs to discharge sequentially according to the sequence from large to small in voltage value, so that the battery packs with overlarge voltage difference cannot discharge simultaneously by controlling the power-on sequence of each battery pack, the problem of circulation when the battery packs are electrified is avoided, and the service life of the battery packs is prolonged.
In one embodiment, step S400 includes:
step S410, if the number of battery packs in the battery system is one, executing a preset battery pack power-on strategy;
in this embodiment, the power-on policy of the single cell pack may be to control the single cell pack to be powered on immediately, or may be to control the single cell pack to be powered on after a preset time period, where the preset time period is set in advance by a person skilled in the art according to a preset rule. In addition, the power-on is divided into two cases, one is that the vehicle is powered on, namely, the battery discharges when the vehicle is started; the other is charging power-up, i.e. charging the vehicle battery. When the vehicle is powered on and charged, the battery pack power-on strategies can be the same or different.
Step S420, if the number of battery packs in the battery system is plural, executing a preset multi-battery pack power-on strategy.
In this embodiment, a plurality of battery packs in the battery system are electrically connected in parallel. The voltage values output by the plurality of battery packs in the battery system may or may not be uniform. If the voltage values of the battery packs are consistent, the multi-battery pack power-on strategy can be to control the battery packs to discharge simultaneously or to control the battery packs to discharge sequentially every preset waiting time; the preset waiting time is preset by a person skilled in the art according to a preset rule; if the voltage values of the battery packs are inconsistent, the battery pack power-on strategies can be to control the battery packs to discharge in sequence from small to large in voltage value, or to control the battery packs to discharge in sequence from large to small in voltage value, or to control the battery packs with voltage values larger than a first preset threshold value not to participate in power supply, or to control the battery packs with voltage values smaller than a second preset threshold value not to participate in power supply, wherein the first preset threshold value is larger than the second preset threshold value.
In one embodiment, step S410 includes:
and if the number of the battery packs in the battery system is one, sending a power-on instruction to control the battery packs to be powered on.
In one embodiment, step S420 includes:
if the number of the battery packs in the battery system is multiple, acquiring the voltages of all the battery packs, and calculating the maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is smaller than a first preset difference value, controlling all the battery packs to be electrified.
In another embodiment, step S420 further includes:
if the number of the battery packs in the battery system is multiple, acquiring the voltages of all the battery packs, and calculating the maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is greater than or equal to a first preset difference value, controlling the battery pack to execute a charge-discharge strategy so as to reduce the battery pack voltage difference.
In this embodiment, the number of battery packs is plural, and each battery pack is connected in parallel. The voltage values of the plurality of battery packs in the battery system may or may not be uniform. If the voltage values of the battery packs are consistent, the maximum voltage difference between the battery packs is 0V; if the voltage values of the plurality of battery packs are not identical, the maximum voltage difference between the battery packs is the voltage value of the battery pack with the largest voltage value minus the voltage value of the battery pack with the smallest voltage value.
The first preset difference value is set in advance by a person skilled in the art according to a preset rule, if the maximum voltage difference is smaller than the first preset difference value, all the battery packs can be controlled to discharge simultaneously, if the maximum voltage difference is larger than the first preset difference value, all the battery packs cannot be controlled to discharge simultaneously, otherwise, a battery pack loop can generate larger current, adhesion of a battery pack relay is easily caused, and then personnel electric shock occurs or the overall thermal runaway risk of the battery is increased.
Therefore, when the maximum voltage difference is larger than the first preset difference value, the battery pack with larger voltage value can be controlled to discharge or the battery pack with smaller voltage value can be controlled to charge, so that the voltage difference between the battery packs is reduced, and the discharging safety of the parallel battery packs is ensured.
In an embodiment, the step of obtaining voltages of all the battery packs and calculating a maximum voltage difference between the battery packs if the number of the battery packs in the battery system is plural includes:
if the maximum voltage difference is larger than or equal to the first preset difference value, continuously discharging the battery pack with the maximum control voltage for a first preset time period, or continuously charging the battery pack with the minimum control voltage for a second preset time period;
the method comprises the following steps: and judging whether the maximum voltage difference is smaller than a first preset difference value.
In this embodiment, the first preset duration and the second preset duration are set in advance by a person skilled in the art according to a preset rule, and the first preset duration and the second preset duration may be equal or unequal. If the maximum voltage difference is detected to be greater than or equal to the first preset difference value before power-on, the method means that a plurality of parallel battery packs cannot be controlled to be powered on at the same time. If the power-up to be performed at this time is that the vehicle is powered up, that is, the battery pack is controlled to discharge when the vehicle is started, the battery pack with the largest voltage can be controlled to continuously discharge for a first preset time period so as to reduce the maximum voltage difference; if the power-up to be performed at this time is charging power-up, that is, charging the vehicle battery pack, the battery pack with the minimum voltage can be controlled to be continuously charged for a second preset time period so as to reduce the maximum voltage difference. After the largest battery pack is continuously discharged or the battery pack with the smallest voltage is continuously charged, the steps are performed again: and judging whether the maximum voltage difference is smaller than a first preset difference value or not until the maximum voltage difference is smaller than the first preset difference value.
In one embodiment, the step of calculating the maximum voltage difference between the battery packs comprises:
acquiring a voltage value of the battery pack with the largest voltage value, and setting the voltage value as a maximum voltage value;
acquiring a voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
the difference between the maximum voltage value and the minimum voltage value is calculated to obtain the maximum voltage difference.
In this embodiment, if there are multiple battery packs in the battery system, the voltage values of all the battery packs are obtained, and all the battery packs are ordered in the order from the large voltage value to the small voltage value, and the maximum voltage value and the minimum voltage value in the voltage values are extracted, and the maximum voltage value is subtracted from the minimum voltage value to obtain the maximum voltage difference.
In one embodiment, step S100 includes:
and acquiring the high-voltage interlocking state, temperature, voltage, resistance and relay state of the battery pack.
In this embodiment, after the battery control unit receives the power-on instruction sent by the vehicle controller, the battery control unit sends a state acquisition instruction to all the battery management units to control all the battery packs to acquire the working state data thereof, receives the working state data, and then judges whether the power-on instruction can be executed according to the working state data. The working state data comprise a high-voltage interlocking state, a temperature, a voltage, a resistance and a relay state, and the high-voltage interlocking is a safety design method for monitoring the integrity of a high-voltage loop by using a low-voltage signal. The electrical connection integrity of each high voltage system loop is tested by using the low voltage signal to check all components on the electric vehicle that are connected to the high voltage wiring harness. If a high-voltage system circuit disconnection or a broken integrity is detected, corresponding safety measures need to be activated. In addition, the temperature, voltage and relay state are all important parameters for judging whether the battery can work normally. For example, if the contact resistance of the relay is increased, the contact resistance can increase the energy consumption of the battery, so that the energy efficiency is reduced, and the endurance mileage is reduced; if the high current operation is superimposed again, adhesion is likely to be further caused.
The application also proposes a battery system comprising a battery pack, a memory, a processor, and a computer program stored on the memory and executable on the processor for performing the method according to the various embodiments of the application.
The application also proposes a readable storage medium on which a computer program is stored. The computer readable storage medium may be a Memory in fig. 1, or may be at least one of ROM (Read-Only Memory)/RAM (Random Access Memory ), a magnetic disk, and an optical disk, where the computer readable storage medium includes several instructions to cause a terminal device (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to perform the methods according to the embodiments of the present application.
In the present application, the terms "first", "second", "third", "fourth", "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the specific meaning of the above terms in the present application will be understood by those of ordinary skill in the art depending on the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, the scope of the present application is not limited thereto, and it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications and substitutions of the above embodiments may be made by those skilled in the art within the scope of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (8)
1. A power-up method of a battery system, wherein the battery system includes one or more battery packs, and when the number of the battery packs is plural, plural battery packs are connected in parallel, the method comprising the steps of:
acquiring working state data of all the battery packs, wherein the working state data comprises voltage state data, temperature state data and relay state data;
judging whether the working state of the battery pack is normal or not according to the working state data;
if the judging result is that the working state of the battery pack is normal, the number of the battery packs in the battery system is obtained;
determining corresponding power-on strategies according to the number of the battery packs, and controlling the battery packs to be powered on according to preset power-on strategies to reduce or eliminate power-on circulation, wherein the preset power-on strategies comprise preset single-battery-pack power-on strategies and preset multi-battery-pack power-on strategies;
the step of determining a corresponding power-on strategy according to the number of the battery packs and controlling the battery packs to be powered on according to a preset power-on strategy comprises the following steps:
if the number of the battery packs in the battery system is one, controlling the battery packs to be electrified;
if the number of the battery packs in the battery system is multiple, executing a preset multi-battery pack power-on strategy;
the step of executing the preset multi-battery pack power-on strategy if the number of the battery packs in the battery system is multiple comprises the following steps:
if the number of the battery packs in the battery system is multiple, when the voltage values output by all the battery packs are consistent, controlling all the battery packs to discharge simultaneously, or sequentially controlling each battery pack to discharge every preset waiting time period 。
2. The method for powering up a battery system according to claim 1, wherein the step of executing a preset multi-battery pack power-up strategy if the number of battery packs in the battery system is plural comprises:
if the number of the battery packs in the battery system is multiple, acquiring the voltages of all the battery packs, and calculating the maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is smaller than a first preset difference value, controlling all the battery packs to be electrified.
3. The method for powering up a battery system according to claim 1, wherein the step of executing a preset multi-battery pack power-up strategy if the number of battery packs in the battery system is plural further comprises:
if the number of the battery packs in the battery system is multiple, acquiring the voltages of all the battery packs, and calculating the maximum voltage difference between the battery packs;
judging whether the maximum voltage difference is smaller than a first preset difference value or not;
and if the maximum voltage difference is greater than or equal to a first preset difference value, controlling the battery pack to execute a charge-discharge strategy so as to reduce the battery pack voltage difference.
4. The method for powering up a battery system according to claim 2 or 3, wherein the step of acquiring voltages of all the battery packs and calculating a maximum voltage difference between the battery packs if the number of the battery packs in the battery system is plural comprises:
if the maximum voltage difference is larger than or equal to the first preset difference value, continuously discharging the battery pack with the maximum control voltage for a first preset time period, or continuously charging the battery pack with the minimum control voltage for a second preset time period;
the method comprises the following steps: and judging whether the maximum voltage difference is smaller than a first preset difference value.
5. A method of powering up a battery system as claimed in claim 2 or 3, wherein the step of calculating the maximum voltage difference between the battery packs comprises:
acquiring a voltage value of the battery pack with the largest voltage value, and setting the voltage value as a maximum voltage value;
acquiring a voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
the difference between the maximum voltage value and the minimum voltage value is calculated to obtain the maximum voltage difference.
6. The method of powering up a battery system according to claim 1, wherein the step of acquiring operation state data of all the battery packs includes:
and acquiring the high-voltage interlocking state, temperature, voltage, resistance and relay state of the battery pack.
7. A battery system comprising a battery pack, a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method of powering up a battery system as claimed in any one of claims 1 to 6.
8. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the power-up method of a battery system according to any one of claims 1 to 6.
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