CN117941124A

CN117941124A - Method and device for battery power change

Info

Publication number: CN117941124A
Application number: CN202280057955.3A
Authority: CN
Inventors: 陈伟峰; 张萼松; 马海
Original assignee: Contemporary Amperex Energy Service Technology Ltd
Current assignee: Contemporary Amperex Energy Service Technology Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2024-04-26
Also published as: WO2024007213A1

Abstract

The embodiment of the application provides a method and a device for battery power conversion, which can utilize accurate battery parameters for charging during charging by correcting the battery parameters, thereby realizing accurate charging. The method for battery power conversion comprises the following steps: correcting a first battery parameter of a first battery, wherein the first battery is a battery replaced by electric equipment; and sending a second battery parameter of the first battery, wherein the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.

Description

Method and device for battery power change

Technical Field

The application relates to the technical field of electric automobiles, in particular to a method and a device for battery power conversion.

Background

With the rapid development of electric automobile technology, electric vehicles become an important component of sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. At present, besides the battery in the electric vehicle can be charged by the charging device to ensure the continuous operation of the electric vehicle, the battery in the electric vehicle can be replaced by the power exchange station to rapidly supply energy for the electric vehicle with insufficient energy.

However, how to charge the battery accurately after replacing the battery is still a problem to be solved.

Disclosure of Invention

The application provides a method and a device for battery power conversion, which can utilize accurate battery parameters to charge during charging by correcting the battery parameters, thereby realizing accurate charging.

In a first aspect, a method for battery power conversion is provided, applied to a battery management system, including: correcting a first battery parameter of a first battery, wherein the first battery is a battery replaced by electric equipment; and sending a second battery parameter of the first battery, wherein the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.

The first battery parameter of the first battery is corrected before charging, so that charging with accurate battery parameters can be ensured, and the charging accuracy can be improved while the battery parameter accuracy is improved.

In some embodiments, the correcting the first battery parameter of the first battery includes: acquiring correction parameters, wherein the correction parameters are used for determining the usage degree of the first battery; and obtaining the second battery parameter according to the correction parameter and a correction model, wherein the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.

And the battery parameters of the first battery are corrected through the correction model, so that the corrected battery parameters can be obtained quickly, and the influence of delay charging caused by overlong correction time on user experience is avoided. Meanwhile, the correction model corrects the first battery parameter by referring to the history of the first battery parameter, so that the change trend of the first battery parameter can be accurately estimated, more accurate battery parameters are obtained, the accuracy of the battery parameters is improved, and the charging accuracy is also improved.

In some embodiments, the first battery parameter comprises a state of health SOH of the first battery.

In the use of battery, the SOH of battery can hardly produce by a wide margin and increase, consequently the model of training out by SOH of first battery is comparatively simple generally, can avoid too complicated operation to occupy the operation resource, can obtain the correction result in the short time simultaneously, can also improve charging efficiency when improving battery accuracy.

In some embodiments, the correction parameter includes a first period of time and/or a first number of cycles of the first battery between a first power-change instruction for instructing the powered device to change the first battery and a second power-change instruction that is a power-change instruction of the first battery when the correction was last performed.

The time period and/or the cycle number between the first power conversion instruction and the second power conversion instruction can embody the use degree of the first battery, and in the process of charging the battery, whether to correct the first battery parameter of the first battery is determined according to different use degrees of the battery in the use process, so that the charging accuracy is improved.

In some embodiments, the correcting the first battery parameter of the first battery includes: and correcting the first battery parameter when the first time period is greater than or equal to a first threshold value and/or the first cycle number is greater than or equal to a second threshold value.

The correction parameter is set with the threshold value to determine the correction of the first battery parameter, so that different use conditions of the first battery can be judged more accurately, and the accuracy of the first battery parameter for charging is ensured under the condition that the correction of the first battery parameter is required, thereby improving the charging accuracy.

In some embodiments, the acquiring correction parameters includes: acquiring a first correction parameter, wherein the first correction parameter is recorded when the first battery receives the first power change instruction; acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the first battery receives the second power change instruction; and determining the correction parameters according to the first correction parameters and the second correction parameters.

The correction parameters of the first battery during the last correction are recorded, and the correction parameters between the two power change instructions are determined, so that whether the battery parameters need to be corrected or not can be accurately judged, accurate battery parameters can be obtained, and the charging accuracy is improved.

In some embodiments, the first battery parameter includes a state of charge, SOC, of the first battery, the correcting the first battery parameter of the first battery includes: the SOC of the first battery is determined after a first period of time during which the first battery is in a stationary state.

Through stewing the first battery, can correct the SOC to make the battery replacement equipment charge with more accurate battery parameter, be favorable to improving the accuracy of charging.

In some embodiments, the method further comprises: and receiving a first power changing instruction, wherein the first power changing instruction is used for indicating the electric equipment to change the first battery.

The BMS is triggered to judge the correction battery parameters through the first power change instruction, the BMS can be instructed to correct the battery parameters when needed, meanwhile, the fact that the relevant battery parameters received by the power change equipment are accurate can be guaranteed, and therefore battery charging accuracy is improved.

In a second aspect, a method for battery power conversion is provided, applied to a power conversion device, and includes: receiving a second battery parameter of a first battery, wherein the second battery parameter is obtained after the first battery parameter is corrected; and charging according to the second battery parameter.

The corrected battery parameters are utilized for charging, so that the accuracy of the battery parameters for charging can be ensured, thereby realizing reasonable charging and improving the accuracy of charging.

In some embodiments, the method further comprises: and sending a first power changing instruction, wherein the first power changing instruction is used for indicating the electric equipment to change the first battery.

In some embodiments, the method further comprises: acquiring a third battery parameter of a second battery, wherein the second battery is a battery replaced by the electric equipment; the charging according to the first battery parameter or the second battery parameter comprises: charging according to the first battery parameter and the third battery parameter; or charging according to the second battery parameter and the third battery parameter.

According to the charging method, the charging is carried out according to the related battery parameters of the first battery and the second battery, so that the charging mode is more reasonable, and meanwhile, the charging accuracy can be improved.

In some embodiments, charging based on the first battery parameter or the second battery parameter includes charging according to the following formula:

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁。

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, and F ₁ is a unit price of electric quantity.

The charging is carried out according to the battery parameters of the replaced battery and the replaced battery, so that the battery conditions of the first battery and the second battery can be fully considered, and accurate charging is facilitated. Meanwhile, when the charging formula is used for charging, the actual data of the corresponding battery is adopted for calculation, so that the charging mode is more reasonable, and the charging accuracy is improved.

In some embodiments, the method further comprises: determining the number of replacement batteries; the charging according to the first battery parameter or the second battery parameter comprises: and charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.

The number of the electric equipment for replacing the battery is different from that of the electric equipment for replacing the battery, so that the number of the battery can be flexibly selected according to different requirements, and the requirements of users can be met in a larger range. Meanwhile, the number of the replaced batteries is used as one aspect of charging of the battery replacing equipment, and the difference of basic cost caused by the condition that the number of the replaced batteries is different from that of the replaced batteries can be avoided, so that reasonable charging can be realized, and the charging accuracy is improved.

In some embodiments, the charging according to the first battery parameter or the second battery parameter, and the number of replacement batteries, includes charging according to the following formula:

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n.

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, F ₁ is a unit price of electric quantity, F ₂ is a unit price of battery, and n is a number of batteries.

The number of the replaced batteries can be flexibly selected according to different requirements by considering the number of the replaced batteries and the replaced batteries, and the charging is reasonable. Therefore, the charging mode is more reasonable, and the charging accuracy is improved.

In a third aspect, there is provided a battery management system comprising: the processing module is used for correcting a first battery parameter of a first battery, wherein the first battery is a battery replaced by electric equipment; the processing module is used for sending a second battery parameter of the first battery, the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.

In some embodiments, the processing module is configured to obtain correction parameters for determining a degree of use of the first battery;

The processing module is used for obtaining the second battery parameter according to the correction parameter and a correction model, and the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.

In some embodiments, the processing module is configured to correct the first battery parameter if the first period of time is greater than or equal to a first threshold and/or the first number of cycles is greater than or equal to a second threshold.

In some embodiments, the processing module is configured to obtain a first correction parameter, where the first correction parameter is a correction parameter of the first battery that is recorded when the first power change instruction is received; the processing module is used for acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the second power-changing instruction is received by the first battery; the processing module is used for determining the correction parameters according to the first correction parameters and the second correction parameters.

In some embodiments, the processing module is to determine the SOC of the first battery after a first period of time during which the first battery is in a stationary state.

In some embodiments, the processing module is configured to receive a first power change instruction, where the first power change instruction is configured to instruct the powered device to change the first battery.

In a fourth aspect, there is provided a power conversion apparatus, including: the processing module is used for receiving second battery parameters of the first battery, and the second battery parameters are obtained after the correction of the first battery parameters; and the processing module is used for charging according to the second battery parameters.

In some embodiments, the processing module is configured to send a first power change instruction, where the first power change instruction is configured to instruct the powered device to change the first battery.

In some embodiments, the processing module is configured to obtain a third battery parameter of a second battery, where the second battery is a battery replaced by the powered device; the processing module is used for charging according to the first battery parameter and the third battery parameter; or the processing module is used for charging according to the second battery parameter and the third battery parameter.

In some embodiments, the processing module is configured to charge according to the following formula:

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁。

In some embodiments, the processing module is to determine a number of replacement batteries; the processing module is used for charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n.

In a fifth aspect, a battery is provided, comprising a battery management system according to any of the embodiments of the third aspect above.

In a sixth aspect, a power exchange station is provided, comprising a power exchange device according to any of the embodiments of the fourth aspect described above.

In a seventh aspect, there is provided an apparatus for battery recharging, comprising a processor and a memory storing instructions which, when executed by the processor, cause the apparatus to perform a method as described in any of the embodiments of the first or second aspects above.

In an eighth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program, which when executed, performs the method according to any one of the embodiments of the first or second aspects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a power conversion scenario according to an embodiment of the present application.

Fig. 2 is a schematic block diagram of a method for battery replacement provided by an embodiment of the present application.

Fig. 3 is a schematic block diagram of another method for battery replacement provided by an embodiment of the present application.

Fig. 4 is a schematic block diagram of another method for battery replacement provided by an embodiment of the present application.

Fig. 5 is a schematic block diagram of an apparatus for battery replacement according to an embodiment of the present application.

In the drawings, the drawings are not drawn to scale.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

With the development of new energy technology, the application field of batteries is becoming wider and wider, for example, the batteries can be used as a power source to provide power for vehicles, and the use of non-renewable resources is reduced. Under the condition that the electric quantity of the battery in the vehicle is insufficient to support the vehicle to continue running, the vehicle can be charged by charging equipment such as a charging pile, namely, the battery in the vehicle is charged, so that the battery can be circularly used for charging and discharging. Alternatively, battery replacement services may be provided to the vehicle by the battery replacement station, i.e., the battery may be quickly removed from or installed on the vehicle. The battery removed from the vehicle may be placed in a battery storage mechanism of the power exchange station for charging in preparation for a subsequent power exchange for the vehicle entering the power exchange station.

After a period of use or a certain number of cycles, the performance of the battery may change, for example, the state of health (SOH) of the battery may be attenuated with the use of the battery. If the cost of a new battery is still calculated according to the SOH of the battery, inaccurate billing may result, causing losses to the user or operator. In addition, with the use of the battery, the state of charge (SOC) of the battery may also cause inaccuracy of the measurement result due to the accumulation of errors, and if charging is still performed according to the SOC directly measured by the battery, the charging inaccuracy may also be caused, thereby bringing a loss to the user or the operator.

In view of this, the embodiment of the application provides a method for battery power conversion, by correcting the battery parameters of the battery, the corrected and accurate battery parameters can be utilized for charging during charging, thereby improving the charging accuracy, ensuring reasonable charging for the power conversion process and reducing the loss of users or operators.

Fig. 1 shows a schematic diagram of an application scenario of a method for replacing a battery according to an embodiment of the present application. As shown in fig. 1, the application scenario of the method of replacing a battery may involve a battery replacement station 11, a vehicle 12, and a battery.

The power exchange station 11 may refer to a location that provides power exchange services for a vehicle. For example, the power exchange station 11 may be a stationary location, or the power exchange station 11 may be a movable location such as a mobile power exchange vehicle, without limitation.

The vehicle 12 may be removably connected with a battery. In some examples, the vehicle 12 may be a car, van, or the like, powered by a power battery.

The batteries may include a battery disposed within the vehicle 12 and a battery located in the power exchange station 11 for exchanging power. For ease of distinction, as shown in fig. 1, the battery to be replaced in the vehicle 12 is denoted as battery 141, and the battery for battery replacement in the battery replacement station is denoted as battery 142. The battery may be a lithium ion battery, a lithium metal battery, a lead-acid battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium ion battery, or the like, and is not limited thereto. The battery may be a battery cell, a battery module, or a battery pack on a scale, which is not limited herein. The battery may, in addition to being a power source for powering the motor of the vehicle 12, also power other electrical devices in the vehicle 12, such as an in-vehicle air conditioner, an in-vehicle player, etc.

After the vehicle 12 with the battery 141 mounted thereon is driven into the battery exchange station 11, the battery 141 is removed from the vehicle 12 by the battery exchange device by the battery exchange station 11, and the battery 142 is taken out of the battery exchange station 11, and then the battery 142 is mounted on the vehicle 12. The vehicle 12 with the battery 142 mounted thereon may then be driven off the battery exchange station 11. Through the power conversion technology, the vehicle can be rapidly supplemented with energy in a few minutes or even tens of seconds, and the user experience is improved.

As shown in fig. 1, a power exchange cabinet 13 may be provided in the power exchange station 11. The battery cabinet 13 includes a first battery management unit 131 and a charging unit 132. The battery changing cabinet 13 may be further provided with a plurality of charging bins 133, and batteries for changing the power may be placed in the charging bins 133 of the battery changing cabinet 13 of the battery changing station 11. The first battery management unit 131 may be a battery management unit provided in the battery change cabinet 13, and for example, the first battery management unit 131 may be referred to as a center battery management unit (Central Battery Management Unit, CBMU). The charging unit 132 may charge the battery in the charging bin 133. In some examples, the charging unit may include components, devices or apparatuses having a charging function, such as an AC/DC module, i.e., an AC/DC module, without limitation. The charging units 132 may be disposed in one-to-one correspondence with the charging bins 133, or one charging unit 132 may be shared by a plurality of charging bins 133, which is not limited herein.

The battery may be correspondingly provided with a second battery management unit 143. For example, the second battery management unit 143 may be referred to as a slave battery management unit (Slave Battery Management Unit, SBMU).

The vehicle 12 is further provided with a third battery management unit 121. The third battery management unit 121 may be used to manage a plurality of batteries 141 mounted on the vehicle, and for example, the third battery management unit 121 may be referred to as a main battery management unit (Main Battery Management Unit, MBMU).

In some embodiments, the SBMU may be implemented using a Battery management system (Battery MANAGEMENT SYSTEM, BMS) for the corresponding Battery; MBMU may be implemented by a control module of a battery break unit (Battery Disconnect Unit, BDU) or by a BMS of one of the batteries.

The power exchange station 11 may also be provided with management means correspondingly. The management device may be a centralized structure or a distributed structure, and is not limited thereto. The management device may be provided inside the power exchange station 11 or may be provided outside the power exchange station 11. In the case of a distributed structure of the management device, the management device may also be arranged partly inside the station 11 and partly outside the station 11. For example, as shown in fig. 1, the management device may include a station control system 151 inside the power exchange station 11 and a cloud server 152 outside the power exchange station 11, which is not limited herein. The station control system 151 may also be referred to as a battery management unit in the power exchange station 11 for managing and controlling the battery 142 in the power exchange station 11.

Alternatively, the first battery management unit 131 may communicate with other units, modules, devices, etc. through wired or wireless means. The second battery management unit 143 may communicate with other units, modules, devices, etc. through wired or wireless means. The third battery management unit 121 may communicate with other units, modules, devices, etc. through wired or wireless means. The station control system 151 may communicate with other units, modules, devices, etc. through wired or wireless means. The wired communication means includes, for example, a CAN communication bus. The wireless communication method includes various methods such as bluetooth communication, wiFi communication, zigBee communication, and the like, and is not limited thereto.

For example, the first battery management unit 131 may communicate with the second battery management unit 143 to control charging of the battery 142 within the battery compartment 133. As another example, the third battery management unit 121 may communicate with the second battery management unit 143 to centrally manage the plurality of batteries 141 on the vehicle 12. For another example, the station control system 151 may communicate with the first battery management unit 131, the second battery management unit 143, or the third battery management unit 121 to obtain information about the battery 141 on the vehicle 12 or the battery 142 in the charging bin 133. For another example, the station control system 151 may also communicate with the cloud server 152 to obtain information about the battery 141 on the vehicle 12 or the battery 142 in the charging bin 133.

After the old battery is replaced from the powered device and the new battery is replaced to the powered device, the powered device may charge for the replacement, where the powered device may be, for example, the vehicle 12 of fig. 1. The present application provides a method for battery replacement as shown in fig. 2. The method 200 shown in fig. 2 may be applied to a battery management system, which may be, for example, a Battery Management System (BMS) of a first battery, i.e., the battery management system always follows the first battery; it is also possible that the BMS connected to the first battery through the external interface, i.e. the first battery is only connected when a measurement of a relevant parameter of the first battery is required. Alternatively, the method 200 may also be applied to a server, a battery-changing device, or the like, which is capable of processing parameters related to the battery. It should be understood that the apparatus for performing the method 200 is not limited by the present application, and the apparatus for processing the relevant parameters of the battery is applicable to the embodiments of the present application. The embodiment of the present application will be described by taking a BMS applied to a first battery as an example, and the method 200 may include at least some of the following.

S220: the BMS corrects first battery parameters of a first battery, and the first battery is a battery replaced by electric equipment.

S230: the BMS sends second battery parameters of the first battery, the second battery parameters are obtained after the first battery parameters are corrected, and the second battery parameters are used for charging the first battery.

The first battery is an old battery used in the electric equipment, the electric equipment is required to be replaced by the first battery in the power replacement process, and then the electric equipment is replaced by a new battery. After the battery of the power conversion equipment is replaced for the electric equipment, the charging is required to be carried out on the power conversion. In order to avoid that the battery parameter measurement is inaccurate and the charging is not reasonable, before charging,

The BMS needs to correct the first battery parameter of the first battery. The first battery parameter of the first battery includes a parameter related to a charging manner, for example, the first battery parameter may be SOC, SOH, or the like of the first battery.

The second battery parameter is obtained after the BMS corrects the first battery parameter, and can be regarded as the actual battery parameter of the first battery, so that the accurate charging result can be obtained by charging by using the second battery parameter. For example, when the first battery parameter is SOC, the second battery parameter is corrected SOC; when the first battery parameter is SOH, the second battery parameter is corrected SOH. The BMS transmits the second battery parameter of the first battery to the battery replacement device, and the battery replacement device can receive the second battery parameter and charge according to the second battery parameter.

According to some embodiments of the application, optionally, the BMS obtains a correction parameter for determining the usage of the first battery; and obtaining a second battery parameter according to the correction parameter and a correction model, wherein the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.

The correction parameter is used to determine the degree of use of the first battery, i.e., the state of use of the first battery. For example, the correction parameter may be a usage period of the first battery; as another example, the correction parameter may be the number of cycles of the first battery. Specifically, if the first battery is used for a longer time or more frequently, it indicates that the first battery is used for a higher degree, and various performance parameters of the battery may be changed greatly; the shorter use time or lower use frequency of the first battery indicates that the use degree of the first battery is lower, and the change of various performance parameters of the battery may be smaller.

The correction model is then a model that corrects the first battery parameter, which may be, for example, a neural network. In the process of training the correction model, the correction model can be trained through a plurality of groups of correction parameters and battery parameters, and calculation parameters in the correction model are adjusted, so that the battery parameters obtained after the correction parameters are input into the correction model are matched with the actual battery parameters of the first battery, namely, the battery parameters output by the correction model can be considered to be accurate within a certain error range.

The battery parameters used for training may be histories of the first battery parameters, for example, the BMS records the first battery parameters at intervals or at regular cycles in the use process of the first battery, each history of the first battery parameters can be corresponding to a corresponding correction parameter, and the correction model is trained by using the battery parameters and the correction parameters in a one-to-one correspondence.

For the first batteries of the same type or the same model, the correction model can be trained through experiments in advance, and the BMS can directly input correction parameters into the correction model to obtain corresponding second battery parameters. Or in a possible implementation manner, the BMS may collect the correction parameters and the battery parameters of the first battery and train the model during the use process of the first battery, and input the corresponding correction parameters into the correction model when the battery parameters need to be corrected, so as to obtain the second battery parameters.

In correcting the first battery parameter using the correction model, the BMS may acquire the correction parameter, for example, for a period of time or a certain number of cycles, and input the correction parameter into the correction model to obtain the second battery parameter. It should be understood that the second battery parameter is a corrected first battery parameter that is a different value of the same battery parameter as the first battery parameter, and that the first battery parameter may also be the same as the second battery parameter with less variation in the battery parameter of the first battery.

According to some embodiments of the application, optionally, the first battery parameter comprises a state of health SOH of the first battery.

SOH of a battery may also be used to represent the degree of aging of the battery, and may generally be defined from the standpoint of battery capacity or battery charge. For example, SOH may be a percentage of the current capacity of the battery to the rated capacity of the battery, or may be a percentage of the current maximum discharged charge of the battery to the maximum discharged charge of the new battery. The SOH of the first battery tends to decay as the usage of the first battery increases, and in one possible implementation, a correction model may be utilized to correct the SOH of the first battery.

According to some embodiments of the application, optionally, the correction parameter includes a first period of time and/or a first number of cycles of the first battery between a first power change instruction and a second power change instruction, where the first power change instruction is used to instruct the electric device to change the first battery, and the second power change instruction is a power change instruction when the first battery is corrected last time.

The correction parameter may comprise a first time period and/or a first number of cycles between the first power change command and the second power change command, i.e. a time interval between the first power change command and the second power change command and/or a number of cycles of the first battery during the time interval. The first power change instruction is a power change instruction for indicating the electric equipment to change the first battery, and the second power change instruction is a power change instruction when the first battery is changed last time and the battery parameters of the first battery are corrected. The second power change instruction may also be used to instruct the powered device to change the first battery, and the powered device indicated by the second power change instruction and the first power change instruction may not be the same powered device.

The correction parameter may be used to determine the degree of use of the first battery between two power-change commands. The first power change instruction is used for indicating the electric equipment to change the first battery and triggering the BMS to judge whether to correct the first battery parameter of the first battery, namely triggering the BMS to execute step S220. The second power change instruction is a different instruction from the first power change instruction, and for the first battery, the second power change instruction and the first power change instruction are not necessarily adjacent two power change instructions. For example, the BMS determines that the first battery parameter of the first battery needs to be corrected when the n-th power change command is received, determines that the first battery parameter of the first battery does not need to be corrected when the n+1th power change command is received, determines that the first battery parameter of the first battery needs to be corrected again when the n+2th power change command is received, and if the n+2th power change command is the first power change command, the n-th power change command is the second power change command.

In order to determine the correction parameters between the first power conversion instruction and the second power conversion instruction, in a possible implementation manner, the power conversion instruction sent by the power conversion equipment carries information of the correction parameters, and the BMS can record the information when receiving the power conversion instruction; in another possible embodiment, the BMS may record correction parameters when receiving a power change command.

In one possible embodiment, the correction parameter may comprise a first period of time, i.e. a length of time between the first power change command and the second power change command. It will be appreciated that when the first period of time is longer, it may be considered that the first battery does not correct the parameters of the battery for a longer period of time, and the performance parameters of the battery are more likely to change, so that the correction of the first battery parameters is beneficial to ensuring the accuracy of the first battery parameters.

In another possible embodiment, the correction parameter may include a first number of cycles, i.e. the number of cycles completed by the battery between the first power change command and the second power change command, wherein the number of cycles completed by one battery for one charge and one discharge is noted as 1. It can be understood that when the number of the first cycles is greater, the first battery can be considered to be not corrected for the parameters of the battery in the process of frequent use, and the possibility of changing the performance parameters of the battery is greater, so that the correction for the parameters of the first battery is beneficial to ensuring the accuracy of the parameters of the first battery.

In the case where the first battery parameter includes a plurality of battery parameters, the correction parameter may also specifically include a period of time and/or a number of cycles corresponding to each battery parameter. For example, in the case where the first battery parameter includes SOC, the correction parameter may be a period of time and/or the number of cycles between the power change instruction and the first power change instruction at the time of last correction of SOC; in the case where the first battery parameter includes SOH, the correction parameter may be a period of time and/or the number of cycles between the power change instruction and the first power change instruction at the time of last correction of SOH. The power change instruction at the time of last correction of SOC and the power change instruction at the time of last correction of SOH may be different power change instructions.

According to some embodiments of the application, optionally, the first battery parameter is corrected if the first period of time is greater than or equal to a first threshold value and/or the first number of cycles is greater than or equal to a second threshold value.

The correction parameter may include a first period of time and/or a first number of cycles, wherein whether to correct the first battery parameter may be determined based on the first period of time or the first number of cycles alone, or a combination of both.

Alternatively, the first threshold may be set for the first time period when determining whether to correct the first battery parameter based on the first time period. In the event that the first time period is greater than or equal to a first threshold, a determination is made to correct the first battery parameter.

Alternatively, the second threshold may be set for the first number of cycles when determining whether to correct the first battery parameter based on the first number of cycles. In the event that the first number of cycles is greater than or equal to the second threshold, a determination is made to correct the first battery parameter.

Alternatively, when determining whether to correct the first battery parameter in combination with the first period of time and the first number of cycles, a threshold may be set for the first period of time and the first number of cycles, respectively. And determining to correct the first battery parameter if the first period of time is greater than or equal to a first threshold and the first number of cycles is greater than or equal to a second threshold.

In one possible embodiment, fields of correction parameters, such as correction time, accumulated number of cycles, etc., may be added to the program in which the BMS operates. In the case where the first battery parameter includes a plurality of battery parameters, fields of correction parameters, such as a use time accumulated at the time of SOH correction, a number of cycles accumulated at the time of SOH correction, a use time accumulated at the time of SOC correction, a number of cycles accumulated at the time of SOC correction, and the like, may be set, respectively.

According to some embodiments of the present application, optionally, the BMS acquires a first correction parameter, which is a correction parameter of the first battery recorded when receiving the first power change command; acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the second power-changing instruction is received by the first battery; a correction parameter is determined from the first correction parameter and the second correction parameter.

Upon receiving the first power change command, the BMS may record a first correction parameter, such as an accumulated use time, a number of cycles, etc., of the first battery; upon receiving the second power change command, the BMS may record a second correction parameter of the same type as the first correction parameter. The first correction parameter and the second correction parameter are both correction parameters related to the first battery, and the correction parameters related to the first battery between the first power change instruction and the second power change instruction can be determined according to the first correction parameter and the second correction parameter.

The correction parameters may be used to determine the usage of the first battery between the first power change command and the second power change command, and in order to obtain the correction parameters, the relevant correction parameters of the first battery may be recorded when the BMS receives the first power change command and the second power change command, so as to determine the correction parameters between the two power change commands.

Specifically, when the BMS receives the second power-changing instruction, the BMS records the correction parameter of the first battery, namely the second correction parameter; when the first power-changing instruction is received, the correction parameters of the first battery are recorded again, and the correction parameters are the first correction parameters.

For example, when the BMS receives the first power conversion instruction and the second power conversion instruction, the BMS may record the time when the first power conversion instruction and the second power conversion instruction are received, or record the related time information from the information carried by the two power conversion instructions, respectively, and then the difference between the times corresponding to the first power conversion instruction and the second power conversion instruction is the correction parameter of the first battery between the first power conversion instruction and the second power conversion instruction. The time may refer to a point in time or may refer to an accumulated usage time.

For another example, the BMS may record the number of cycles of the first battery during the use of the first battery, and when receiving the first power change instruction and the second power change instruction, read the number of cycles recorded by the BMS when receiving the power change instruction, respectively, so that the difference between the number of cycles corresponding to the first power change instruction and the second power change instruction is the correction parameter of the first battery between the first power change instruction and the second power change instruction.

According to some embodiments of the application, optionally, the SOC of the first battery is determined after a first period of time, during which the first battery is in a stationary state.

When the BMS measures the SOC of the first battery, the measurement is generally inaccurate due to an error of the ampere-hour integration method, so that the first battery can be left for a period of time and then the SOC of the first battery can be determined under the condition that the SOC of the first battery needs to be corrected. The first period may be a preset period or a period determined by the BMS according to a state in which the SOC of the first battery is no longer changed. In order to ensure the accuracy of the SOC for charging, the battery exchange device may perform charging after the correction of the SOC is completed.

Optionally, as shown in fig. 3, the method 200 may further include the following, according to some embodiments of the present application.

S210: the BMS receives a first power change instruction, and the first power change instruction is used for indicating the electric equipment to change the first battery.

The first power change command may be received from the power change device before the BMS determines whether to correct the first battery parameter of the first battery. The first power change instruction is used for indicating the electric equipment to change the first battery, and the BMS can execute power change operation required to be executed by the BMS according to the first power change instruction under the condition of receiving the first power change instruction. Meanwhile, the first power conversion instruction can trigger the BMS to judge whether to correct the battery parameters according to the correction parameters so as to ensure that the battery parameters which are sent to the power conversion equipment by the BMS and are related to charging are accurate.

The present application also provides a method 201 for battery power conversion, as shown in fig. 4, where the method 201 shown in fig. 4 may be performed by a power conversion device, such as the station control system 151 in fig. 1. Alternatively, the method 201 may also be applied to a server, a battery management system, or the like, which is capable of processing parameters related to a battery. It should be understood that the apparatus for performing the method 201 is not limited in this application, and the apparatus for processing the relevant parameters of the battery is applicable to the embodiment of the present application. The method 201 may include at least some of the following.

S230: and receiving a second battery parameter of the first battery, wherein the second battery parameter is obtained after the first battery parameter is corrected.

S240: and charging according to the second battery parameter.

The second battery parameter is battery parameter obtained after the BMS corrects the first battery parameter, when the battery replacement device needs to charge the battery replacement process, the BMS can send the corrected second battery parameter to the battery replacement device, and the battery replacement device can charge according to the corrected battery parameter. Compared with the first battery parameter, the second battery parameter serving as the corrected battery parameter can more accurately reflect the state of the first battery when the first battery is replaced from the electric equipment.

According to some embodiments of the application, optionally, the method 201 further comprises: the power conversion equipment sends a first power conversion instruction which is used for indicating the electric equipment to replace the first battery.

The battery replacement device can send a first battery replacement instruction to the BMS to instruct the BMS to control the electric equipment to detach the first battery. Meanwhile, the first power conversion instruction can trigger the BMS to judge whether the first battery parameter of the first battery is needed or not, so that the BMS provides accurate battery parameters when providing relevant battery parameters of the first battery for power conversion equipment.

According to some embodiments of the application, optionally, the method 201 further comprises: acquiring a third battery parameter of a second battery, wherein the second battery is a battery replaced by electric equipment; charging according to the first battery parameter and the third battery parameter; or charging is performed according to the second battery parameter and the third battery parameter.

In the power exchange process, the power exchange equipment needs to exchange the old battery used in the electric equipment, and then exchanges the new battery for the electric equipment, wherein the exchanged old battery is the first battery, and the exchanged new battery is the second battery. When the battery replacement device charges the battery replacement process of the first battery, the battery replacement device needs to acquire the related battery parameters of the second battery in addition to the related battery parameters of the first battery. The second battery may be stored in the battery exchange station before being replaced, and the battery parameters associated with the second battery may be directly measured by the BMS of the second battery. Therefore, in case the BMS of the first battery determines that the correction of the first battery parameter of the first battery is required, the battery changing device charges according to the second battery parameter of the first battery and the third battery parameter of the second battery; in the case that the BMS of the first battery determines that the correction of the first battery parameter of the first battery is not required, the battery replacement device charges according to the first battery parameter of the first battery and the third battery parameter of the second battery.

In one possible embodiment, before the second battery is replaced for the electric device, an instruction may also be sent to the second battery, instructing the BMS of the second battery to determine whether correction of the battery parameter related to the second battery is required. When the battery parameter of the second battery needs to be corrected, the BMS of the second battery sends the corrected battery parameter to the battery replacement equipment, and the third battery parameter is the corrected battery parameter; and under the condition that the battery parameters of the second battery do not need to be corrected, the BMS of the second battery directly sends the acquired battery parameters to the battery replacement equipment, and the third battery parameters are the battery parameters which are not corrected.

According to some embodiments of the application, the battery change device may optionally be charged according to the following formula (1).

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁ (1)

Wherein, F is the charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is the total electric quantity of the first battery, SOC ₂ and SOH ₂ are the third battery parameter of the second battery, E ₂ is the total electric quantity of the second battery, and F ₁ is the unit price of the electric quantity.

The charging of the battery exchange device may specifically be performed according to the above formula (1) when the first battery is charged. The formula (1) is to subtract the actual electric quantity of the second battery from the actual electric quantity of the first battery, and then multiply the difference between the two with the unit price of the electric quantity, so as to obtain the expense required to be paid by the user. In formula (1), the SOC and SOH of the first battery are both actual battery parameters of the first battery, that is, in the case where correction is required, SOC ₁ and/or SOH ₁ are corrected battery parameters; in the case where correction is not required, the SOC ₁ and/or SOH ₁ directly acquired by the BMS may be considered to be accurate.

According to some embodiments of the application, optionally, the method 201 further comprises: determining the number of replacement batteries; and charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.

In one possible implementation manner, a plurality of batteries can be installed on the same electric equipment, so that in the process of changing the power, the power changing equipment can also determine the number of the replaced batteries and charge the power according to the number of the replaced batteries. For example, when the old battery is replaced, the electric equipment only replaces the first battery; when a new battery is replaced for the electric equipment, the electric equipment is required to be replaced by a plurality of second batteries. Similarly, when the old battery is replaced, the electric equipment replaces a plurality of first batteries; when the electric equipment is replaced by a new battery, the electric equipment only needs to be replaced by a second battery. The battery changing device needs to take into account the difference in the number of the first battery and the second battery when charging the battery changing process. Specifically, the battery replacement device may charge according to the number difference between the first battery and the second battery, or may charge according to the number of the replaced battery or the replaced battery.

According to some embodiments of the application, the battery change device may optionally be charged according to the following formula (2).

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n (2)

Wherein, F is the charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is the total electric quantity of the first battery, SOC ₂ and SOH ₂ are the third battery parameter of the second battery, E ₂ is the total electric quantity of the second battery, F ₁ is the unit price of the electric quantity, F ₂ is the unit price of the battery, and n is the number of batteries.

Under the condition that the number of the batteries replaced by the electric equipment is different from the number of the batteries replaced by the electric equipment, the charging can be specifically carried out according to the formula (2). Equation (2) is based on equation (1) with the addition of a calculation of the base cost of the battery. Wherein f ₂ is the basic cost of one battery, and n can be the number of replaced batteries or the difference between the two.

The application also provides a battery management system comprising a processing module, which may be a processor in the battery management system. The processing module is used for correcting first battery parameters of a first battery, wherein the first battery is a battery replaced by electric equipment; the processing module is used for sending a second battery parameter of the first battery, the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.

According to some embodiments of the application, optionally, the processing module is configured to obtain a correction parameter, where the correction parameter is used to determine a usage degree of the first battery;

The processing module is used for obtaining the second battery parameter according to the correction parameter and the correction model, and the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.

According to some embodiments of the application, optionally, the processing module is configured to correct the first battery parameter if the first period of time is greater than or equal to a first threshold value and/or the first number of cycles is greater than or equal to a second threshold value.

According to some embodiments of the present application, optionally, the processing module is configured to obtain a first correction parameter, where the first correction parameter is a correction parameter recorded by the first battery when receiving the first power change instruction;

The processing module is used for acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the first battery receives a second power-changing instruction;

the processing module is used for determining correction parameters according to the first correction parameters and the second correction parameters.

According to some embodiments of the application, optionally, the processing module is configured to determine the SOC of the first battery after a first period of time, during which the first battery is in a stationary state.

According to some embodiments of the application, optionally, the processing module is configured to receive a first power change instruction, where the first power change instruction is configured to instruct the electrical device to change the first battery.

The application also provides a battery exchange device, which comprises a processing module, wherein the processing module can be a processor in the battery exchange device. The processing module is used for receiving second battery parameters of the first battery, and the second battery parameters are obtained after the first battery parameters are corrected; the processing module is used for charging according to the second battery parameters.

According to some embodiments of the application, optionally, the processing module is configured to send a first power change instruction, where the first power change instruction is configured to instruct the electric device to change the first battery.

According to some embodiments of the present application, optionally, the processing module is configured to obtain a third battery parameter of a second battery, where the second battery is a battery replaced by an electric device; the processing module is used for charging according to the first battery parameter and the third battery parameter; or the processing module is used for charging according to the second battery parameter and the third battery parameter.

According to some embodiments of the application, optionally, the processing module is configured to charge according to the following formula:

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁。

According to some embodiments of the application, optionally, the processing module is configured to determine a number of replacement batteries; the processing module is used for charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n.

The application also provides a battery, which comprises the battery management system in any embodiment.

The application also provides a power exchange station, comprising: the battery exchange apparatus in any of the above embodiments.

The present application also provides an apparatus 500 for battery power conversion, as shown in fig. 5, comprising a processor 501 and a memory 502, the memory 502 storing instructions which, when executed by the processor 501, cause the apparatus 500 to perform a method as described in any of the embodiments above.

The application also provides a computer readable storage medium storing a computer program which, when executed, performs a method as in any of the embodiments described above.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

A method for battery replacement, comprising:

correcting a first battery parameter of a first battery, wherein the first battery is a battery replaced by electric equipment;

and sending a second battery parameter of the first battery, wherein the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.
The method of claim 1, wherein correcting the first battery parameter of the first battery comprises:

Acquiring correction parameters, wherein the correction parameters are used for determining the usage degree of the first battery;

and obtaining the second battery parameter according to the correction parameter and a correction model, wherein the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.
The method of claim 2, wherein the first battery parameter comprises a state of health SOH of the first battery.
A method according to claim 2 or 3, characterized in that the correction parameters comprise a first period of time and/or a first number of cycles of the first battery between a first power change instruction for instructing the powered device to change the first battery and a second power change instruction, which is a power change instruction when the first battery was last corrected.
The method of claim 4, wherein correcting the first battery parameter of the first battery comprises:

And correcting the first battery parameter when the first time period is greater than or equal to a first threshold value and/or the first cycle number is greater than or equal to a second threshold value.
The method according to any one of claims 2 to 5, wherein the acquiring correction parameters comprises:

Acquiring a first correction parameter, wherein the first correction parameter is recorded when the first battery receives the first power change instruction;

acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the first battery receives the second power change instruction;

and determining the correction parameters according to the first correction parameters and the second correction parameters.
The method of any of claims 2 to 6, wherein the first battery parameter comprises a state of charge, SOC, of the first battery, the correcting the first battery parameter of the first battery comprising:

The SOC of the first battery is determined after a first period of time during which the first battery is in a stationary state.
The method according to any one of claims 1 to 7, further comprising:

and receiving a first power changing instruction, wherein the first power changing instruction is used for indicating the electric equipment to change the first battery.
A method for battery replacement, comprising:

Receiving a second battery parameter of a first battery, wherein the second battery parameter is obtained after the first battery parameter is corrected;

And charging according to the second battery parameter.
The method according to claim 9, wherein the method further comprises:

And sending a first power changing instruction, wherein the first power changing instruction is used for indicating the electric equipment to change the first battery.
The method according to claim 9 or 10, characterized in that the method further comprises:

acquiring a third battery parameter of a second battery, wherein the second battery is a battery replaced by the electric equipment;

The charging according to the first battery parameter or the second battery parameter comprises:

charging according to the first battery parameter and the third battery parameter; or alternatively

And charging according to the second battery parameter and the third battery parameter.
The method of claim 11, wherein charging based on the first battery parameter or the second battery parameter comprises:

the charging is performed according to the following formula,

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁；

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, and F ₁ is a unit price of electric quantity.
The method according to any one of claims 9 to 12, further comprising:

determining the number of replacement batteries;

The charging according to the first battery parameter or the second battery parameter comprises:

and charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.
The method of claim 13, wherein the charging based on the first battery parameter or the second battery parameter, and the number of replacement batteries, comprises:

the charging is performed according to the following formula,

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n;

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, F ₁ is a unit price of electric quantity, F ₂ is a unit price of battery, and n is a number of batteries.
A battery management system, comprising:

the processing module is used for correcting a first battery parameter of a first battery, wherein the first battery is a battery replaced by electric equipment;

the processing module is used for sending a second battery parameter of the first battery, the second battery parameter is obtained after the correction of the first battery parameter, and the second battery parameter is used for charging the first battery.
The battery management system of claim 15, wherein,

The processing module is used for acquiring correction parameters, and the correction parameters are used for determining the usage degree of the first battery;

The processing module is used for obtaining the second battery parameter according to the correction parameter and a correction model, and the correction model is used for determining the second battery parameter according to the history record of the first battery parameter.
The battery management system of claim 16 wherein the first battery parameter comprises a state of health SOH of the first battery.
The battery management system according to claim 16 or 17, wherein the correction parameter comprises a first period of time and/or a first number of cycles of the first battery between a first power change instruction for instructing the powered device to change the first battery and a second power change instruction that is a power change instruction of the first battery at the time of last correction.
The battery management system of claim 18, wherein the processing module is configured to correct the first battery parameter if the first period of time is greater than or equal to a first threshold and/or the first number of cycles is greater than or equal to a second threshold.
The battery management system of any one of claims 16 to 19, wherein the processing module is configured to obtain a first correction parameter, the first correction parameter being a correction parameter of the first battery that is recorded when the first power change instruction is received;

The processing module is used for acquiring a second correction parameter, wherein the second correction parameter is a correction parameter recorded when the second power-changing instruction is received by the first battery;

The processing module is used for determining the correction parameters according to the first correction parameters and the second correction parameters.
The battery management system of any one of claims 16 to 20 wherein the processing module is configured to determine the SOC of the first battery after a first period of time during which the first battery is in a stationary state.
The battery management system of any one of claims 15 to 21, wherein the processing module is configured to receive a first power change instruction, the first power change instruction being configured to instruct a powered device to change the first battery.
A power conversion apparatus, comprising:

The processing module is used for receiving second battery parameters of the first battery, and the second battery parameters are obtained after the correction of the first battery parameters;

And the processing module is used for charging according to the second battery parameters.
The power conversion device according to claim 23, wherein the processing module is configured to send a first power conversion instruction, the first power conversion instruction being configured to instruct the powered device to replace the first battery.
The power conversion device according to claim 23 or 24, wherein the processing module is configured to obtain a third battery parameter of a second battery, the second battery being a battery replaced by the powered device;

The processing module is used for charging according to the first battery parameter and the third battery parameter; or alternatively

The processing module is used for charging according to the second battery parameter and the third battery parameter.
The power conversion apparatus of claim 25, wherein the processing module is configured to charge according to the following formula,

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁；

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, and F ₁ is a unit price of electric quantity.
The power conversion apparatus according to any one of claims 23 to 26, wherein the processing module is configured to determine a number of replacement batteries;

The processing module is used for charging according to the first battery parameter or the second battery parameter and the number of the replaced batteries.
The power conversion apparatus of claim 27, wherein the processing module is configured to charge according to the following formula,

F＝(SOC ₂×E ₂×SOH ₂-SOC ₁×E ₁×SOH ₁)×f ₁+f ₂×n;

Wherein F is a charge replacement cost, SOC ₁ and SOH ₁ are the first battery parameter or the second battery parameter of the first battery, E ₁ is a total electric quantity of the first battery, SOC ₂ and SOH ₂ are third battery parameters of the second battery, E ₂ is a total electric quantity of the second battery, F ₁ is a unit price of electric quantity, F ₂ is a unit price of battery, and n is a number of batteries.
A battery, comprising:

the battery management system of any one of claims 15 to 22.
A power exchange station, comprising:

A power conversion apparatus according to any one of claims 23 to 28.
An apparatus for battery replacement, comprising:

A processor and a memory storing instructions that, when executed by the processor, cause the apparatus to perform the method of any one of the preceding claims 1 to 8 or to perform the method of any one of the preceding claims 9 to 14.