CN113696735A - Power-on method of battery system, battery system and readable storage medium - Google Patents
Power-on method of battery system, battery system and readable storage medium Download PDFInfo
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention 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 judgment result shows that the working state of the battery pack is normal, acquiring the number of the battery packs in the battery system; 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 invention can solve the problem of circulation current when the parallel battery packs are electrified and prolong the service life of the battery packs.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a battery system electrifying method, a battery system and a readable storage medium.
Background
Among the electric automobile, provide the electric energy through power battery to the drive vehicle removes, and current electric automobile market is more and more many, and the customer has different continuation of the journey mileage demand, in order to satisfy customer's demand, requires the battery package of the multiple electric quantity of same style motorcycle type development, in order to supply the user to select different battery packages according to self demand. The existing 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 a circulation problem when being electrified, impact current is generated in the moment of parallel connection, the performance of a battery core is influenced, and the service life of the battery packs is shortened.
Disclosure of Invention
The invention provides a power-on method of a battery system, which aims to solve the problem of circulation current when parallel battery packs are powered on and prolong the service life of the battery packs.
In order to achieve the above object, the present invention provides a method for powering up a battery system, including 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 judgment result shows that the working state of the battery pack is normal, acquiring the number of the battery packs in the battery system;
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 the battery packs in the battery system is one, executing a preset single 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 electrifying strategy.
Optionally, if the number of the battery packs in the battery system is one, a power-on instruction is sent to control the power-on of the battery packs.
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, controlling the battery pack to execute a charge-discharge strategy so as to reduce the voltage difference of the battery pack.
Optionally, if the maximum voltage difference is greater than or equal to a first preset difference, controlling the battery pack with the maximum voltage to continuously discharge for a first preset time period, or controlling the battery pack with the minimum voltage to continuously charge for a second preset time period;
the execution steps are as follows: 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 the maximum voltage value;
acquiring the voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
and calculating the difference between the maximum voltage value and the minimum voltage value to obtain the maximum voltage difference.
Optionally, a high voltage interlock status, temperature, voltage, resistance and relay status of the battery pack is obtained.
In order to achieve the above object, the present application also proposes a battery system, which includes a battery pack, a memory, a processor, and a computer program stored on the memory and executable on the processor, and which, when executed by the processor, implements a power-on method of the battery system.
To achieve the above object, the present application further proposes a readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing the power-up method of the battery system.
In the technical scheme of the invention, 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 working state of the battery packs is normal, the number of the battery packs in the battery system is acquired, 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 at the same time can be determined according to the number of the battery packs, and different power-on strategies are adopted for power-on according to the number of the battery packs, so that the circulation problem of the battery packs during power-on can be avoided, and the service life of the battery packs can be prolonged.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram illustrating a power-up method of a battery system according to an embodiment of the present invention;
fig. 2 is a flowchart of a power-up method of a battery system according to an embodiment of the invention;
fig. 3 is a flowchart of a power-up method of a battery system according to another embodiment of the invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a battery system provided in each embodiment of the present invention. 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 combine certain components, or a different arrangement of components. The processor 03 is connected to the memory 02 and the execution module 01, respectively, and the memory 02 stores a computer program, which is executed by the processor 03 at the same time.
The execution module 01 may receive a battery power-on instruction, send a state acquisition instruction, and feed back the above information to the processor 03.
The memory 02 may be used to store 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 created according to the use of the terminal, or the like. Further, the 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 by using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 02 and calling data stored in the memory 02, thereby integrally monitoring the vehicle. Processor 03 may include one or more processing units; preferably, the processor 03 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 03.
Those skilled in the art will appreciate that the battery system configuration shown in fig. 1 is not intended to be limiting of battery packs and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
Various embodiments of the method of the present invention are presented in terms of the above-described hardware architecture.
Referring to fig. 2, in a first embodiment of a power-up method of a battery system of the present invention, the power-up method of the 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 a power distribution unit, a 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 a battery pack and can acquire real-time operation state data of the battery pack at any time, such as the voltage, temperature, relay state, and the like of the battery pack.
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 acquires 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 obtaining instruction issued by the battery management unit may obtain only a certain item of data of the battery pack, such as only the temperature of the battery pack, only the voltage of the battery pack, and the like, or may obtain multiple items of data of the battery pack at the same time, such as the temperature, the voltage, the relay state, and the like of the battery pack at the same time.
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 operating state data of each battery pack, it can determine whether the operating state of the battery pack is normal according to the operating state data of each battery pack. In one embodiment, the operating state data of the battery pack includes voltage state data, temperature state data, relay state data, and the like. The battery control unit can judge whether the voltage value of the battery pack is in a preset voltage threshold value according to the voltage state data, if so, the voltage of the battery pack is judged to be normal, 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 value according to the temperature state data, and if the temperature of the battery pack is in the preset temperature threshold value, the temperature of 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 relay state data, 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. The preset voltage threshold and the preset temperature threshold are preset by a person skilled in the art according to a preset rule.
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 judgment result is that the working state of the battery pack is normal, acquiring the number of the battery packs in the battery system;
in this embodiment, whether the operating state of each battery pack is normal is determined in advance, so that the attenuation degree and the damage degree of each battery pack can be obtained, where the attenuation of the battery means that the electric quantity that can be accommodated by the battery is reduced, for example, the original capacity of the battery is 50 degrees of electricity, and the capacity of the battery is changed to 40 degrees of electricity after 20% of attenuation. The attenuation phenomenon of all batteries after use occurs, if the attenuation speed of the batteries is within a reasonable speed range, the attenuation belongs to normal attenuation, for example, the attenuation of the battery of an electric vehicle in the first year of use is relatively large, about 8%, the attenuation in the subsequent 2-3 years is 4%, the attenuation in the 5-6 years is 1% year by year, the degree does not have great influence on the normal operation of the battery, and if the attenuation speed of the batteries is relatively high, for example, the attenuation exceeding 20% in the first year of use, the attenuation belongs to abnormal attenuation, and the normal operation of the battery is greatly influenced. If the judgment result of the battery control unit shows 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 can still work normally; if the judgment result of the battery control unit shows that the working state of one or more battery packs is abnormal, the one or more battery packs are relatively attenuated or relatively damaged, abnormal data information is sent to a vehicle control unit of the vehicle, and the work of the one or more battery packs is suspended.
And 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 battery pack numbers correspond to different battery power-on strategies. For example, when the number of the battery packs is one, the power on of the battery pack is directly controlled. When the number of the battery packs is multiple, the multiple battery packs are connected in parallel, the battery control unit can control the battery packs to discharge in sequence from small voltage value to large voltage value, and can also control the battery packs to discharge in sequence from large voltage value to small voltage value, so that the battery packs with overlarge voltage difference cannot discharge at the same time by controlling the power-on sequence of each battery pack, the circulation problem when the battery packs are powered on is avoided, and the service life of the battery packs is prolonged.
In one embodiment, step S400 includes:
step S410, if the number of the battery packs in the battery system is one, executing a preset single battery pack power-on strategy;
in this embodiment, the power-on strategy of the single battery pack may be to control the single battery pack to be powered on immediately, or may be to control the single battery 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 conditions, one is the power-on in driving, namely, the battery discharges when the vehicle starts; the other is charging power-up, i.e., charging the vehicle battery. When the travelling crane is powered on and the charging is powered on, the power-on strategies of the single battery pack can be the same or different.
In step S420, if there are a plurality of battery packs in the battery system, a preset multi-battery-pack power-on strategy is executed.
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 consistent. If the voltage values of the plurality of battery packs are consistent, the charging strategy of the plurality of battery packs can control the plurality of battery packs to discharge simultaneously, or can control the battery packs to discharge sequentially every preset waiting time; the preset waiting time is set in advance by the technicians in the field according to preset rules; if the voltage values of the plurality of battery packs are inconsistent, the power-on strategies of the plurality of battery packs can control the battery packs to discharge in sequence from small to large according to the voltage values, or can control the battery packs to discharge in sequence from large to small according to the voltage values, or control the battery packs with the voltage values larger than a first preset threshold value not to participate in power supply, or control the battery packs with the 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 power-on of the battery packs.
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 among 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 among 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, controlling the battery pack to execute a charge-discharge strategy so as to reduce the voltage difference of the battery pack.
In this embodiment, the number of the battery packs is plural, and the battery packs are 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 consistent, the maximum voltage difference between the battery packs is the voltage value of the battery pack with the maximum voltage value minus the voltage value of the battery pack with the minimum voltage value.
The first preset difference value is set in advance according to a preset rule by a person skilled in the art, 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 be caused to generate large current, the battery pack relay is easy to adhere, and then the electric shock of the person or the overall thermal runaway risk of the battery is increased.
Therefore, when the maximum voltage difference is larger than the first preset difference, the battery pack with a larger voltage value can be controlled to discharge, or the battery pack with a 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 the voltages of all the battery packs and calculating the maximum voltage difference between the voltage packs if the number of the battery packs in the battery system is multiple includes:
if the maximum voltage difference is greater than or equal to a first preset difference, controlling the battery pack with the maximum voltage to continuously discharge for a first preset time period, or controlling the battery pack with the minimum voltage to continuously charge for a second preset time period;
the execution steps are as follows: and judging whether the maximum voltage difference is smaller than a first preset difference value.
In this embodiment, the first preset time period and the second preset time period are both set in advance by a person skilled in the art according to a preset rule, and the first preset time period and the second preset time period may be equal to or different from each other. If the maximum voltage difference detected before power-on is greater than or equal to the first preset difference, it means that the plurality of parallel battery packs cannot be controlled to be powered on simultaneously. If the power-on required at this time is the power-on of the running vehicle, namely the battery pack is controlled to discharge when the vehicle is started, the battery pack with the maximum voltage can be controlled to continuously discharge for a first preset time so as to reduce the maximum voltage difference; if the power-on required at this time is charging power-on, that is, the vehicle battery pack is charged, the battery pack with the minimum voltage may be controlled to be continuously charged for a second preset time to reduce the maximum voltage difference. After the largest battery pack is continuously discharged or the battery pack with the minimum voltage is continuously charged, the following steps are executed 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 the voltage value of the battery pack with the maximum voltage value, and setting the voltage value as the maximum voltage value;
acquiring the voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
and calculating the difference between the maximum voltage value and the minimum voltage value to obtain the maximum voltage difference.
In this embodiment, if a plurality of battery packs are provided in the battery system, the voltage values of all the battery packs are obtained, all the battery packs are sorted in the order of the voltage values from large to small, 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, the temperature, the voltage, the resistance and the relay state of the battery pack.
In this embodiment, after the battery control unit receives the power-on command sent by the vehicle control unit, the battery control unit sends a state acquisition command to all the battery management units to control all the battery packs to acquire their working state data, receives the working state data, and then determines whether the power-on command can be executed according to the working state data. The working state data comprises 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 inspect all components on the electric vehicle that are connected to the high voltage wiring harness. If the disconnection or the integrity damage of the high-voltage system loop is detected, corresponding safety measures need to be started. In addition, the temperature, the voltage and the relay state are important parameters for judging whether the battery can work normally. For example, if the contact resistance of the relay is increased, the contact resistance may increase the energy consumed by the battery, so that the energy efficiency is reduced and the endurance mileage is reduced; if the situation of operation is superposed with a large current, the adhesion is likely to be further caused.
The present invention 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 present invention.
The invention also proposes a readable storage medium on which the computer program is stored. The computer-readable storage medium may be the Memory in fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A power-on 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, the plural battery packs are connected in parallel, the method 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 judgment result shows that the working state of the battery pack is normal, acquiring the number of the battery packs in the battery system;
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.
2. The method for powering up a battery system according to claim 1, wherein the step of determining a corresponding power-up policy according to the number of the battery packs and controlling the battery packs to be powered up according to the power-up policy comprises:
if the number of the battery packs in the battery system is one, executing a preset single 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 electrifying strategy.
3. The method for powering up the battery system according to claim 2, wherein the step of executing the preset cell pack powering-up strategy if the number of the battery packs in the battery system is one comprises:
and if the number of the battery packs in the battery system is one, controlling the battery packs to be electrified.
4. The method for powering up the battery system according to claim 2, wherein if the number of battery packs in the battery system is multiple, the step of executing the preset multi-battery-pack powering-up strategy 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 among 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.
5. The method for powering up a battery system according to claim 2, wherein if there are a plurality of battery packs in the battery system, the step of executing a preset multi-battery-pack powering-up strategy 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 among 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, controlling the battery pack to execute a charge-discharge strategy so as to reduce the voltage difference of the battery pack.
6. The method for powering on a battery system according to claim 4 or 5, wherein the step of obtaining the voltages of all the battery packs and calculating the maximum voltage difference between the battery packs if the number of the battery packs in the battery system is multiple comprises:
if the maximum voltage difference is greater than or equal to a first preset difference, controlling the battery pack with the maximum voltage to continuously discharge for a first preset time period, or controlling the battery pack with the minimum voltage to continuously charge for a second preset time period;
the execution steps are as follows: and judging whether the maximum voltage difference is smaller than a first preset difference value.
7. The method for powering up a battery system according to claim 4 or 5, wherein the step of calculating the maximum voltage difference between the battery packs comprises:
acquiring the voltage value of the battery pack with the maximum voltage value, and setting the voltage value as the maximum voltage value;
acquiring the voltage value of the battery pack with the minimum voltage value, and setting the voltage value as the minimum voltage value;
and calculating the difference between the maximum voltage value and the minimum voltage value to obtain the maximum voltage difference.
8. The method for powering up a battery system according to claim 1, wherein the step of acquiring the operating state data of all the battery packs includes:
and acquiring the high-voltage interlocking state, the temperature, the voltage, the resistance and the relay state of the battery pack.
9. A battery system comprising a battery pack, a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the power-up method of the battery system according to any one of claims 1 to 8.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the power-up method of a battery system according to any one of claims 1 to 8.
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