CN112349978B - Battery pack, battery management method and vehicle - Google Patents
Battery pack, battery management method and vehicle Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 abstract description 8
- 230000001360 synchronised effect Effects 0.000 description 15
- 238000007599 discharging Methods 0.000 description 9
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
-
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a battery pack, a battery management method and a vehicle, wherein in the method, under the condition that the battery pack is connected with a first BCU, if a first battery replacement signal is received, first current state information of the battery pack is obtained through the first BCU, and under the condition that a second battery replacement signal is received, the first current state information is sent to a second BCU, so that the second BCU generates second current state information according to the first current state information; under the condition that the battery pack is connected with the second BCU, if a third battery replacement signal is received, second current state information of the battery pack is obtained through the second BCU, and after the battery pack is connected with the first BCU, the second current state information is sent to the first BCU under the condition that a fourth battery replacement signal is received; the method and the device can ensure that the service state information of the battery is not lost, thereby comprehensively monitoring the current service state of the battery.
Description
Technical Field
The disclosure relates to the technical field of vehicles, in particular to a battery pack, a battery management method and a vehicle.
Background
The pure electric vehicle is favored by vehicle users with the advantages of energy conservation and environmental protection, however, the use range of the pure electric vehicle is restricted by the problem that the cruising range of the pure electric vehicle cannot be guaranteed, the market prospect of the pure electric vehicle is greatly reduced, in order to solve the problem that the cruising range of the pure electric vehicle is short, the battery replacing vehicle is provided, namely, the battery replacing station similar to the role of a fuel vehicle gas station is provided, the electric vehicle can replace the battery in the battery replacing station, the battery with lower electric quantity on the vehicle is detached and placed in the battery replacing station for charging, and the battery with full electric quantity in the battery replacing station is installed on the vehicle, so the cruising range of the pure electric vehicle is prolonged by the mode of replacing the battery.
At present, along with the popularization of a battery replacement vehicle, battery replacement scenes are gradually increased, and in the battery replacement scenes, batteries can be frequently replaced between a battery replacement station and the vehicle, but the battery management method in the pure electric vehicle is only suitable for monitoring the use condition of the batteries at the vehicle end and is not suitable for the battery replacement scenes.
Disclosure of Invention
The purpose of the present disclosure is to provide a battery pack, a battery management method, and a vehicle.
In order to achieve the above object, the present disclosure provides a battery pack on which BMUs are provided, the BMUs being configured to be respectively connected with a first BCU provided on a vehicle or a second BCU provided on a battery replacement station;
the BMU is used for acquiring first current state information of the battery pack through the first BCU if a first battery replacement signal is received under the condition that the battery pack is connected with the first BCU, and sending the first current state information to the second BCU if a second battery replacement signal is received after the battery pack is connected with the second BCU, so that the second BCU generates second current state information according to the first current state information; and (c) a second step of,
The BMU is further configured to, when the battery pack is connected to the second BCU, acquire, through the second BCU, second current state information of the battery pack if a third battery replacement signal is received, and after the battery pack is connected to the first BCU, send, when a fourth battery replacement signal is received, the second current state information to the first BCU, so that the first BCU generates the first current state information according to the second current state information.
Optionally, the BMU is configured to: after receiving the fourth battery replacement signal, if the first battery replacement signal is not received, acquiring a first battery parameter of the battery pack, and sending the first battery parameter to the first BCU, so that the first BCU generates the first current state information according to the second current state information and the first battery parameter under the condition of receiving the second current state information, and sends the first current state information to the BMU after receiving the first battery replacement signal.
Optionally, the BMU is further configured to:
under the condition that the first current state information sent by the first BCU is received, the first current state information is stored, and after the second BCU is determined to receive the first current state information, the first current state information stored locally is deleted.
Optionally, the BMU is configured to: after receiving the second battery replacement signal, if the third battery replacement signal is not received, acquiring second battery parameters of the battery pack, and sending the second battery parameters to the second BCU, so that the second BCU generates second current state information according to the first current state information and the second battery parameters under the condition that the first current state information is received, and sends the second current state information to the BMU after receiving the third battery replacement signal.
Optionally, the BMU is further configured to:
under the condition that the second current state information sent by the second BCU is received, storing the second current state information; and deleting the second current state information stored locally after the first BCU is determined to receive the second current state information.
In a second aspect of the present disclosure, there is provided a vehicle battery management method applied to a battery pack on which BMUs are provided, the BMUs being configured to be connected to first BCUs provided on a vehicle or to be connected to second BCUs provided on a power conversion station, respectively, the method including:
Under the condition that the battery pack is connected with the first BCU, if a first battery replacement signal is received, acquiring first current state information of the battery pack through the first BCU, and after the connection between the battery pack and the second BCU is established, if a second battery replacement signal is received, sending the first current state information to the second BCU so that the second BCU generates second current state information according to the first current state information;
under the condition that the battery pack is connected with the second BCU, if a third battery replacement signal is received, second current state information of the battery pack is obtained through the second BCU, and after the battery pack is connected with the first BCU, if a fourth battery replacement signal is received, the second current state information is sent to the first BCU, so that the first BCU generates the first current state information according to the second current state information;
optionally, the method further comprises:
after the fourth battery replacement signal is received, if the first battery replacement signal is not received, collecting first battery parameters of the battery pack, and sending the first battery parameters to the first BCU, so that the first BCU generates the first current state information according to the second current state information and the first battery parameters under the condition that the first BCU receives the second current state information, and sends the first current state information to the BMU after the first battery replacement signal is received.
Optionally, the method further comprises:
under the condition that the first current state information sent by the first BCU is received, storing the first current state information;
deleting the first current state information stored locally after determining that the second BCU receives the first current state information.
Optionally, the method further comprises:
after the second battery replacement signal is received, if the third battery replacement signal is not received, collecting second battery parameters of the battery pack, and sending the second battery parameters to the second BCU, so that the second BCU generates second current state information according to the first current state information and the second battery parameters under the condition that the first current state information is received, and sends the second current state information to the BMU after the third battery replacement signal is received.
Optionally, the method further comprises:
under the condition of receiving second current state information sent by the second BCU, storing the second current state information;
deleting the second current state information stored locally after determining that the first BCU receives the second current state information
In a third aspect of the present disclosure, there is provided a battery management method applied to a vehicle having a first BCU provided thereon, the first BCU being configured to connect with a BMU in a battery pack, the method including:
responding to a first power swapping signal, sending first current state information to the BMU so that the BMU stores the first current state information, and sending the first current state information to a second BCU in a power swapping station under the condition of receiving a second power swapping signal.
Optionally, before the sending the first current state information to the BMU in response to the first power change signal, the method further includes:
responding to a fourth power switching signal, and receiving second current state information sent by the BMU;
receiving a first battery parameter sent by the BMU;
and generating the first current state information according to the second current state information and the first battery parameter.
In a fourth aspect of the present disclosure, the method is applied to a battery swapping station, where a second BCU is provided on the battery swapping station, and the second BCU is used for connecting with a BMU in a battery pack, and the method includes:
and responding to a third battery replacement signal, sending second current state information to the BMU so that the BMU stores the second current state information, and sending the second current state information to a first BCU in a vehicle under the condition of receiving a fourth battery replacement signal.
Optionally, before sending the second current state information to the BMU in response to the third power change signal, the method further includes:
responding to a second power switching signal, and receiving first current state information sent by the BMU;
receiving a second battery parameter sent by the BMU;
and generating the second current state information according to the first current state information and the second battery parameter.
In a fifth aspect of the present disclosure, there is provided a vehicle comprising the vehicle battery management system of the first aspect above.
According to the technical scheme, the first current state information generated by the first BCU is synchronized to the second BCU, and the second current state information generated by the second BCU is synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery is replaced in the power station, the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state on a vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a battery management system shown in an exemplary embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a method of battery management according to another exemplary embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating a method of battery management according to yet another exemplary embodiment of the present disclosure;
FIG. 4 is a flow chart illustrating another method of battery management according to yet another exemplary embodiment of the present disclosure;
FIG. 5 is an exemplary diagram illustrating a vehicle in yet another exemplary implementation of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Before describing the specific embodiments of the present disclosure in detail, the following description is first made on an application scenario of the present disclosure, and the present disclosure may be applied to a battery swapping scenario, that is, a battery pack with a lower electric quantity on a vehicle is detached and placed in a battery swapping station for charging, and the battery pack with a full electric quantity in the battery swapping station is installed on the vehicle, so as to meet a power requirement of a cruising mileage of a pure electric vehicle. At present, a Battery pack Of an electric vehicle generally includes a Battery cell and a Battery Management system BMS (Battery Management system), where the Battery Management system BMS includes a BCU (Battery Computer Unit, a motherboard) and a BMU (Battery Management Unit, a slave board), the BMU is used to detect Battery parameters such as cell voltage, current, temperature, charging or discharging time Of a Battery, and send the acquired Battery parameters to the BCU, and the BCU calculates a current SOC (State Of Charge, percentage Of remaining power) Of the Battery cell and an SOE (State Of Energy, remaining power) according to the received Battery parameters and counts a current failure condition Of the Battery. In a battery replacement scene, if a battery pack of a current pure electric vehicle is replaced cyclically between the vehicle and a battery replacement station, each battery pack needs to be provided with one BCU and one BMU, generally, in order to not affect the vehicle endurance, each vehicle needs to be provided with at least two battery packs, that is, the number of the battery packs needs to be more than twice of the total number of the battery replacement vehicles, and considering that each battery pack is provided with one BCU and one BMU, the battery replacement station is not beneficial to saving the manufacturing cost and reducing the volume and the quality of the battery; therefore, the scheme that the BCU and the BMU are separately arranged is provided, namely the BCU is not arranged in the battery pack but arranged on the vehicle, the BMU is arranged on the battery pack, and when the battery is replaced, the BCU on the vehicle does not move to the battery replacement station along with the battery pack, so that a plurality of battery packs can share one BCU, the operation cost can be saved, the size and the quality of each battery pack can be reduced, and convenience is brought to battery replacement. However, when the battery pack is replaced, the BCU fixed on the vehicle does not flow, so the BCU can only receive the battery parameters of the battery pack in the discharging process, and the battery parameters of the battery pack in the battery replacing station, because the BMU does not have a storage function, when the battery pack is installed on the vehicle again, the BCU cannot acquire the battery parameters generated in the charging process in the historical time, that is, the current battery management system of the battery replacing vehicle can cause the service state information of the battery in the battery replacing station to be lost, and cannot acquire the comprehensive service state information of the battery pack, so that the current service state of the battery pack cannot be comprehensively monitored, and a reliable data basis cannot be provided for battery maintenance.
In order to solve the technical problem, the present disclosure provides a battery pack, a battery management method and a vehicle, where in a situation where the battery pack is connected to a first BCU, if a first battery replacement signal is received, first current state information of the battery pack is obtained by the first BCU, and after the battery pack is connected to a second BCU, if a second battery replacement signal is received, the first current state information is sent to the second BCU, so that the second BCU generates the second current state information according to the first current state information; and under the condition that the battery pack is connected with the second BCU, if the third battery replacement signal is received, second current state information of the battery pack is acquired through the second BCU, and after the battery pack is connected with the first BCU, the second current state information is sent to the first BCU under the condition that a fourth battery replacement signal is received, so that the first BCU generates the first current state information according to the second current state information. Therefore, the first current state information generated by the first BCU is synchronized to the second BCU, and the second current state information generated by the second BCU is synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery is replaced, the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state on a vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
FIG. 1 is a schematic diagram of a battery management system shown in an exemplary embodiment of the present disclosure; referring to fig. 1, a battery pack is provided with BMUs, and the BMUs are respectively connected with a first BCU provided on a vehicle or a second BCU provided on a battery replacement station;
the BMU is used for acquiring first current state information of the battery pack through the first BCU if a first battery replacement signal is received under the condition that the battery pack is connected with the first BCU, and sending the first current state information to the second BCU if a second battery replacement signal is received after the battery pack is connected with the second BCU, so that the second BCU generates second current state information according to the first current state information; and the BMU is further configured to, when the battery pack is connected to the second BCU, obtain second current state information of the battery pack through the second BCU if the third battery replacement signal is received, and send the second current state information to the first BCU if a fourth battery replacement signal is received after the battery pack is connected to the first BCU, so that the first BCU generates the first current state information according to the second current state information.
The first battery replacement signal is a signal generated before the battery pack is detached from the vehicle, the second battery replacement signal is a signal generated after the battery pack is installed in the battery replacement station, the third battery replacement signal is a signal generated before the battery pack is detached from the battery replacement station, the fourth battery replacement signal is a signal generated after the battery pack is installed in the vehicle, the first battery replacement signal and the fourth battery replacement signal may be the same or different, and the second battery replacement signal and the third battery replacement signal may be the same or different. The first current state information is battery pack use state information generated by the first BCU according to a first battery parameter and first historical state information when the battery pack is connected with the second BCU, the second current state information is battery pack use state information generated by the second BCU according to a second battery parameter and the first current state information when the battery pack is connected with the first BCU, and the first historical state information may include battery pack use state information generated by the second BCU according to a second battery parameter in a charging process and first current state information received last time in historical time in a latest charging process, that is, second current state information updated last time in historical time.
It should be noted that each vehicle is provided with a first BCU, each power exchanging station is provided with at least one second BCU, each vehicle is simultaneously provided with at least one battery pack, when the battery pack is mounted on the vehicle, a BMU in the battery pack is connected with the first BCU on the vehicle, and when the battery pack is detached from the vehicle and mounted at the power exchanging station, the battery pack is connected with the second BCU of the power exchanging station. The BMU may be used for monitoring the state of the battery pack when the battery pack is installed in the vehicle (i.e., the BMU is connected to the first BCU), and monitoring the state of the battery pack when the battery pack is replaced in the power station (i.e., the battery pack is connected to the second BCU):
embodiments of monitoring the state of the battery pack while the battery pack is mounted on the vehicle may include:
when a battery pack is installed on a vehicle, a fourth power switching signal can be triggered through a first preset switch, under the condition that a BMU in the battery pack receives the fourth power switching signal, first historical state information (the first historical state information can comprise battery pack use state information generated by a second BCU in the latest charging process according to second battery parameters in the charging process and first current state information received last time in historical time, namely second current state information updated last time in historical time) of the battery pack stored on the BMU in the battery pack is sent to the first BCU, meanwhile, the BMU collects first battery parameters of the battery pack and sends the first battery parameters to the first BCU, the first battery parameters are corresponding to the battery parameters when the battery pack is connected with the first BCU, and under the condition that the first historical state information is received by the first BCU, generating first current state information according to the first historical state information and the first battery parameter; before the battery pack is detached from the vehicle, the first battery replacement signal is triggered through the second preset switch, when the first BCU receives the first battery replacement signal, the first current state information is sent to the BMU, and meanwhile the BMU stops sending first battery parameters to the first BCU, so that the monitoring process when the battery pack is installed on the vehicle is completed.
The embodiment of monitoring the state of the battery pack when the battery pack is in the battery replacement station may include:
when a battery pack is connected to a second BCU in a battery swapping station, a second battery swapping signal can be triggered through a third preset switch, under the condition that the BMU in the battery pack receives the second battery swapping signal, second historical state information (namely first current state information updated recently in historical time) of the battery pack stored on the BMU in the battery pack is sent to the second BCU, the BMU acquires second battery parameters of the battery pack, the second battery parameters are corresponding battery parameters when the battery pack is connected with the second BCU, the second battery parameters are sent to the second BCU, and under the condition that the second historical state information is received by the second BCU, second current state information (namely the updated first historical state information) is generated according to the second historical state information and the second battery parameters; when the battery is to be removed from the battery replacement station, the third battery replacement signal can be triggered through a fourth preset switch, when the second BCU receives the third battery replacement signal, the second current state information is sent to the BMU, and meanwhile, the BMU stops sending the second battery parameter to the second BCU, so that the state monitoring of the battery pack in the battery replacement station is completed.
In addition, when generating the first current state information according to the first historical state information and the first battery parameter, the following embodiments may be implemented:
on the basis of the first historical state information, when the residual electric quantity of the battery pack is determined to be smaller than or equal to a preset electric quantity threshold value, adding one to the number of times of power shortage use so as to count the number of times of current power shortage use; when the current temperature is determined to be greater than or equal to the preset temperature threshold, recording the current temperature, recording time information corresponding to the current temperature, and meanwhile, adding one to the first historical state information on the basis of the exceeding-standard temperature times so as to count the exceeding-standard temperature times; when the current voltage is determined not to belong to the preset voltage range, generating voltage fault information; and when the insulation condition is determined to be abnormal, generating insulation fault information, and counting the times of insulation faults on the basis of the first historical state information. In the related art, the types of the generated reaction battery use state information are more, and the embodiment is easier to obtain, so that the disclosure is not listed here.
For the embodiment of generating the second current state information according to the second historical state information (i.e., the first current state information) and the second battery parameter, reference may be made to the above embodiment of generating the first current state information according to the first historical state information and the first battery parameter, and details of the disclosure are not repeated herein.
It should be noted that the first preset switch and the second preset switch may be the same switch or different switches, and the third preset switch and the fourth preset switch may be the same switch or different switches. The first preset switch, the second preset switch, the third preset switch and the fourth preset switch can be relays or travel switches.
Therefore, the first current state information of the battery pack generated by the first BCU on the vehicle is synchronized to the second BCU, and the second current state information of the battery pack generated by the second BCU when the battery pack is replaced by the power station is synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery pack is replaced by the power station, the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state when the battery pack is replaced by the vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis can be provided for battery maintenance.
Optionally, the BMU is configured to, after receiving the fourth battery swapping signal, acquire a first battery parameter of the battery pack if the first battery swapping signal is not received, send the first battery parameter to the first BCU, so that the first BCU generates first current state information according to the second current state information and the first battery parameter when receiving second current state information, and send the first current state information to the BMU after receiving the first battery swapping signal.
The first battery parameter may include temperature information, current voltage information, current information, discharge duration and other information when the battery pack is connected to the first BCU. The first current state information may include information reflecting the health condition of the battery pack, such as residual current, temperature exceeding information, power shortage use information, insulation condition information, and the like when the battery pack is connected with the first BCU.
In addition, the first current state information is battery pack use state information generated by the first BCU according to first battery parameters and first historical state information when the battery pack is connected with the second BCU, the second current state information is battery pack use state information generated by the second BCU according to second battery parameters and the first current state information when the battery pack is connected with the first BCU, and the first historical state information may include battery pack use state information generated by the second BCU according to second battery parameters in a charging process and first current state information received last time in historical time in the latest charging process.
Optionally, the BMU is further configured to:
under the condition that first current state information sent by the first BCU is received, the first current state information is stored, and after the second BCU is determined to receive the first current state information, the first current state information stored locally is deleted.
It should be noted that, by enabling the BMU to have a storage function, it is possible to synchronize first current state information of a battery pack generated by a first BCU on a vehicle to a second BCU, thereby ensuring that the second BCU does not lose battery parameter information when the battery pack is on the vehicle, so as to ensure that the second BCU can comprehensively monitor a current use state of the battery; after the second BCU is determined to receive the first current state information, the first current state information stored locally is deleted, so that the utilization rate of storage resources on the BMU can be effectively improved.
Optionally, the BMU is configured to: after receiving the second battery replacement signal, if the third battery replacement signal is not received, acquiring second battery parameters of the battery pack, and sending the second battery parameters to the second BCU, so that the second BCU is used for generating second current state information according to the first current state information and the second battery parameters under the condition of receiving the first current state information, and sending the second current state information to the BMU after receiving the third battery replacement signal.
The second battery parameter may include temperature information when the battery pack is connected to the second BCU, current voltage information, current information, charging duration, and the like. The second current state information may include information reflecting the health condition of the battery pack, such as residual current when the battery pack is connected to the second BCU, temperature exceeding information, power shortage use information, insulation condition information, and the like.
Optionally, the BMU is further configured to:
under the condition of receiving second current state information sent by the second BCU, storing the second current state information; and deleting the second current state information stored locally after determining that the first BCU receives the second current state information.
It should be noted that, by enabling the BMU to have a storage function, second current state information generated by the second BCU when the battery pack is connected to the second BCU can be synchronized to the first BCU, so that it is ensured that the first BCU does not lose battery parameter information when the battery pack is in the power swapping station, and that the first BCU can comprehensively monitor the current use state of the battery; after the first BCU is determined to receive the second current state information, the second current state information stored in the local is deleted, so that the utilization rate of storage resources on the BMU can be effectively improved.
In addition, the battery pack may further include: a power distribution module including a discharge assembly and a charge assembly; the discharging assembly is used for connecting the battery pack and the vehicle electric assembly so as to enable the battery pack to supply power for the vehicle electric assembly; the charging assembly is used for connecting the battery pack and a charging device at the battery replacement station end, so that the charging device charges the battery pack.
According to the technical scheme, the first current state information generated by the first BCU is synchronized to the second BCU, and the second current state information generated by the second BCU is synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery is replaced in the power station, the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state on a vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
FIG. 2 is a flow chart illustrating a method of battery management according to another exemplary embodiment of the present disclosure; referring to fig. 2, the method may be applied to a battery pack, and the method may include the steps of:
The BMU is arranged on the battery pack and is used for being connected with a first BCU arranged on a vehicle or connected with a second BCU arranged on a power exchange station. The first battery replacement signal is a signal generated before the battery pack is detached from the vehicle, and the second battery replacement signal is a signal generated after the battery pack is mounted to a battery replacement station.
In this step, one possible implementation manner of obtaining the first current state information of the battery pack through the first BCU is as follows:
after receiving the fourth battery replacement signal, if the first battery replacement signal is not received, acquiring a first battery parameter of the battery pack, and sending the first battery parameter to the first BCU, so that the first BCU generates first current state information according to second current state information and the first battery parameter under the condition that the first BCU receives the second current state information, and sends the first current state information to the BMU after receiving the first battery replacement signal.
It should be noted that the first battery parameter may include temperature information, current voltage information, current information, and discharge duration information when the battery pack is connected to the first BCU. The first current state information may include information reflecting the health condition of the battery pack, such as residual current when the battery pack is connected with the first BCU, temperature exceeding information, power shortage use information, insulation condition information, and the like. The first current state information is battery pack use state information generated by the first BCU according to first battery parameters and first historical state information when the battery pack is connected with the second BCU, the second current state information is battery pack use state information generated by the second BCU according to second battery parameters and the first current state information when the battery pack is connected with the first BCU, and the first historical state information may include battery pack use state information generated by the second BCU in the latest charging process according to second battery parameters and first current state information received last time in historical time when the power station is changed.
In addition, it should be further noted that, in the case of receiving the first current state information sent by the first BCU, the first current state information is stored; deleting the first current state information stored locally after determining that the second BCU receives the first current state information.
The third battery replacement signal is a signal generated before the battery pack is detached from the battery replacement station, the fourth battery replacement signal is a signal generated after the battery pack is mounted on the vehicle, the first battery replacement signal and the fourth battery replacement signal may be the same or different, and the second battery replacement signal and the third battery replacement signal may be the same or different.
In this step, after receiving the second battery replacement signal, if the third battery replacement signal is not received, acquiring a second battery parameter of the battery pack, and sending the second battery parameter to the second BCU, so that the second BCU generates second current state information according to the first current state information and the second battery parameter under the condition that the second BCU receives the first current state information, and sends the second current state information to the BMU after receiving the third battery replacement signal.
It should be noted that the second battery parameter may include temperature information, current voltage information, current information, and charging duration information when the second BCU is connected to the battery. The second current state information may include information reflecting the health condition of the battery pack, such as residual current when connected with the second BCU, temperature exceeding information, power shortage use information, insulation condition information, and the like.
In addition, it should be noted that the method may further include: under the condition of receiving second current state information sent by the second BCU, storing the second current state information; deleting the second current state information stored locally after determining that the second current state information is received by the first BCU.
According to the technical scheme, the first current state information generated by the first BCU is synchronized to the second BCU, and the second current state information generated by the second BCU is synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery is replaced in the power station, the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state on a vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
FIG. 3 is a flow chart diagram illustrating a method of battery management according to yet another exemplary embodiment of the present disclosure; referring to fig. 3, the battery management method is applied to a vehicle provided with a first BCU for connecting with a BMU in a battery pack, and includes:
Therefore, the first current state information generated by the first BCU can be synchronized to the second BCU, and the second current state information generated by the second BCU can be synchronized to the first BCU, so that the first BCU can be ensured not to lose the use state information of the battery pack in the charging state when the battery pack is replaced, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
FIG. 4 is a flow chart illustrating another method of battery management according to yet another exemplary embodiment of the present disclosure; referring to fig. 4, the battery management method is applied to a battery charging station, where a second BCU is provided on the battery charging station, and the second BCU is used for being connected with a BMU in a battery pack, and the method includes:
Step 405, in response to the third power conversion signal, sending second current state information to the BMU, so that the BMU stores the second current state information, and sending the second current state information to the first BCU in the vehicle when receiving the fourth power conversion signal.
According to the technical scheme, the first current state information generated by the first BCU is synchronized to the second BCU, and the second current state information generated by the second BCU is synchronized to the first BCU, so that the second BCU can be ensured not to lose the use state information of the battery pack in the discharging state on the vehicle, the current use state of the battery can be comprehensively monitored, and reliable data basis is provided for battery maintenance.
FIG. 5 is an exemplary diagram illustrating a vehicle in yet another exemplary real time of the present disclosure; referring to fig. 5, the vehicle includes the battery management system described above with respect to fig. 1.
With regard to the method in the above-described embodiment, the specific manner in which each step performs the operation has been described in detail in the embodiment related to the system, and will not be elaborated upon here.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (15)
1. The battery pack is characterized in that BMUs are arranged on the battery pack and are respectively connected with first BCUs arranged on a vehicle or second BCUs arranged on a battery replacement station;
the BMU is used for acquiring first current state information of the battery pack through the first BCU if a first battery replacement signal is received under the condition that the battery pack is connected with the first BCU, and sending the first current state information to the second BCU if a second battery replacement signal is received after the battery pack is connected with the second BCU, so that the second BCU generates second current state information according to the first current state information; and the number of the first and second groups,
the BMU is further configured to, when the battery pack is connected to the second BCU, obtain, through the second BCU, second current state information of the battery pack if a third battery replacement signal is received, and send, after the battery pack is connected to the first BCU, the second current state information to the first BCU if a fourth battery replacement signal is received, so that the first BCU generates the first current state information according to the second current state information.
2. The battery pack of claim 1, wherein the BMU is configured to:
after receiving the fourth battery replacement signal, if the first battery replacement signal is not received, acquiring a first battery parameter of the battery pack, and sending the first battery parameter to the first BCU, so that the first BCU generates the first current state information according to the second current state information and the first battery parameter under the condition of receiving the second current state information, and sends the first current state information to the BMU after receiving the first battery replacement signal.
3. The battery pack of claim 2, wherein the BMU is further configured to:
under the condition that the first current state information sent by the first BCU is received, the first current state information is stored, and after the second BCU is determined to receive the first current state information, the first current state information stored locally is deleted.
4. The battery pack of claim 1, wherein the BMU is configured to:
after receiving the second battery replacement signal, if the third battery replacement signal is not received, acquiring second battery parameters of the battery pack, and sending the second battery parameters to the second BCU, so that the second BCU generates second current state information according to the first current state information and the second battery parameters under the condition that the first current state information is received, and sends the second current state information to the BMU after receiving the third battery replacement signal.
5. The battery pack of claim 4, wherein the BMU is further configured to:
under the condition that the second current state information sent by the second BCU is received, storing the second current state information; and deleting the second current state information stored locally after the first BCU is determined to receive the second current state information.
6. A battery management method applied to a battery pack provided with BMUs for respectively connecting with a first BCU provided on a vehicle or for respectively connecting with a second BCU provided on a charging station, the method comprising:
under the condition that the battery pack is connected with the first BCU, if a first battery replacement signal is received, first current state information of the battery pack is obtained through the first BCU, and after the battery pack is connected with the second BCU, if a second battery replacement signal is received, the first current state information is sent to the second BCU, so that the second BCU generates second current state information according to the first current state information; and (c) a second step of,
under the condition that the battery pack is connected with the second BCU, if a third battery replacement signal is received, second current state information of the battery pack is obtained through the second BCU, and after the battery pack is connected with the first BCU, if a fourth battery replacement signal is received, the second current state information is sent to the first BCU, so that the first BCU generates the first current state information according to the second current state information.
7. The method of claim 6, further comprising:
after receiving the fourth battery replacement signal, if the first battery replacement signal is not received, acquiring a first battery parameter of the battery pack, and sending the first battery parameter to the first BCU, so that the first BCU generates the first current state information according to the second current state information and the first battery parameter under the condition that the first BCU receives the second current state information, and sends the first current state information to the BMU after receiving the first battery replacement signal.
8. The method of claim 7, further comprising:
under the condition that the first current state information sent by the first BCU is received, storing the first current state information;
deleting the first current state information stored locally after determining that the second BCU receives the first current state information.
9. The method of claim 6, further comprising:
after the second battery replacement signal is received, if the third battery replacement signal is not received, collecting second battery parameters of the battery pack, and sending the second battery parameters to the second BCU, so that the second BCU generates second current state information according to the first current state information and the second battery parameters under the condition that the first current state information is received, and sends the second current state information to the BMU after the third battery replacement signal is received.
10. The method of claim 9, further comprising:
under the condition that second current state information sent by the second BCU is received, storing the second current state information;
deleting the second current state information stored locally after determining that the first BCU receives the second current state information.
11. A battery management method applied to a vehicle having a first BCU provided thereon, the first BCU configured to connect with a BMU in a battery pack, the method comprising:
responding to a first power change signal, sending first current state information to the BMU so that the BMU stores the first current state information, and sending the first current state information to a second BCU in a power change station under the condition of receiving a second power change signal so that the second BCU generates second current state information according to the first current state information;
the BMU is further configured to, when the battery pack is connected to the second BCU, obtain, through the second BCU, second current state information of the battery pack if a third battery replacement signal is received, and send, after the battery pack is connected to the first BCU, the second current state information to the first BCU if a fourth battery replacement signal is received, so that the first BCU generates the first current state information according to the second current state information.
12. The method of claim 11, wherein prior to said sending first current state information to the BMU in response to a first power change signal, the method further comprises:
responding to a fourth power switching signal, and receiving second current state information sent by the BMU;
receiving a first battery parameter sent by the BMU;
and generating the first current state information according to the second current state information and the first battery parameter.
13. A battery management method is applied to a battery replacement station, wherein a second BCU is arranged on the battery replacement station and is used for being connected with a BMU in a battery pack, and the method comprises the following steps:
responding to a third power conversion signal, sending second current state information to the BMU so that the BMU stores the second current state information, and sending the second current state information to a first BCU in a vehicle under the condition of receiving a fourth power conversion signal so that the first BCU generates first current state information according to the second current state information;
the BMU is used for acquiring first current state information of the battery pack through the first BCU if a first battery replacement signal is received under the condition that the battery pack is connected with the first BCU, and sending the first current state information to the second BCU if a second battery replacement signal is received after the battery pack is connected with the second BCU, so that the second BCU generates second current state information according to the first current state information.
14. The method of claim 13, wherein prior to sending second current state information to the BMU in response to a third swap signal, the method further comprises:
responding to a second power switching signal, and receiving first current state information sent by the BMU;
receiving a second battery parameter sent by the BMU;
and generating the second current state information according to the first current state information and the second battery parameter.
15. A vehicle, characterized in that it comprises a battery pack according to any one of the preceding claims 1-5.
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| CN120056933A (en) * | 2023-11-30 | 2025-05-30 | 宁德时代新能源科技股份有限公司 | Control method and device, power exchange station, computing device and storage medium |
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| CN109017382A (en) * | 2018-08-01 | 2018-12-18 | 奇瑞汽车股份有限公司 | Battery management method, device and the storage medium of electric car |
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| CN101248364B (en) * | 2005-07-07 | 2011-05-25 | 株式会社东芝 | Battery system |
| WO2017061188A1 (en) * | 2015-10-08 | 2017-04-13 | 富士電機株式会社 | Vehicle-mounted charging device |
| CN109980136A (en) * | 2017-12-28 | 2019-07-05 | 奥动新能源汽车科技有限公司 | The interchangeable battery case and its matching control system and method for new energy vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109017382A (en) * | 2018-08-01 | 2018-12-18 | 奇瑞汽车股份有限公司 | Battery management method, device and the storage medium of electric car |
| CN110843494A (en) * | 2018-08-03 | 2020-02-28 | 奥动新能源汽车科技有限公司 | Vehicle battery replacement interaction system and method |
| CN209561570U (en) * | 2019-03-06 | 2019-10-29 | 浙江吉智新能源汽车科技有限公司 | A kind of electric car quick change cell apparatus |
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Inventor after: Kang Yanjun Inventor after: Wu Hong Inventor after: Shao Changhong Inventor after: Guo Fenggang Inventor after: Lu Zhenghua Inventor before: Kang Yanjun Inventor before: Wu Hong |