Battery pack online health management system and method
阅读说明：本技术 一种电池包在线健康管理系统及方法 (Battery pack online health management system and method ) 是由 黄加虎 蒋明波 张荣龙 胡其开 于 2020-07-23 设计创作，主要内容包括：本发明提供一种电池包在线健康管理系统及方法。电池包在线健康管理系统包括：监测模块、知识设计模块和用户交互模块；监测模块用于监测电池包及单体电池在充放电过程中的性能参数,并将性能参数发送给知识设计模块；其中,性能参数包括电池包及单体电池的容量、端电压、能量和温度；知识设计模块用于根据性能参数确定电池包的安全状态,并将安全状态发送给用户交互模块,其中,安全状态包括需维修和不需要维修；用户交互模块用于向用户展示电池包的安全状态。本发明实施例的方案可以较为准确的确定电池包的状态,并及时将电池包状态反馈给用户,确保用户对电池包的使用安全。(The invention provides a battery pack online health management system and a battery pack online health management method. The battery pack online health management system comprises: the system comprises a monitoring module, a knowledge design module and a user interaction module; the monitoring module is used for monitoring performance parameters of the battery pack and the single battery in the charging and discharging processes and sending the performance parameters to the knowledge design module; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery; the knowledge design module is used for determining the safety state of the battery pack according to the performance parameters and sending the safety state to the user interaction module, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state; the user interaction module is used for displaying the safety state of the battery pack to a user. The scheme of the embodiment of the invention can more accurately determine the state of the battery pack and feed the state of the battery pack back to the user in time, thereby ensuring the use safety of the battery pack by the user.)
1. An online health management system for a battery pack, comprising: the system comprises a monitoring module, a knowledge design module and a user interaction module;
the monitoring module is used for monitoring performance parameters of the battery pack and the single battery in the charging and discharging processes and sending the performance parameters to the knowledge design module; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery;
the knowledge design module is used for determining the safety state of the battery pack according to the performance parameters and sending the safety state to the user interaction module, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state;
the user interaction module is used for displaying the safety state of the battery pack to a user.
2. The battery pack online health management system of claim 1,
the knowledge design module is specifically used for comparing the performance parameters with standard performance parameters and determining the safety state of the battery pack according to the comparison result.
3. The battery pack online health management system of claim 1,
the knowledge design module is specifically used for determining the charging state and the health state of the battery pack according to the performance parameters, and determining the safety state of the battery pack according to the charging state and the health state.
4. The battery pack online health management system of claim 3,
the knowledge design module is further specifically configured to perform weighted summation on each of the performance parameters, the charging state, and the health state to obtain a weighted parameter, and determine the safety state of the battery pack according to the weighted parameter.
5. The battery pack online health management system of claim 1,
the performance parameters comprise a first performance parameter in the current charging and discharging process of the battery pack and a second performance parameter in the historical charging and discharging process;
the knowledge design module is further used for determining the attenuation degree of the battery pack according to the first performance parameter and the second performance parameter; and determining the safety state of the battery pack according to the attenuation degree.
6. The battery pack online health management system of claim 1,
the monitoring module is further used for storing the performance parameters;
the user interaction module is also used for calling and displaying the performance parameters by the monitoring module according to the request of the user.
7. The battery pack online health management system of claim 1,
the user interaction module comprises an acousto-optic device, and the acousto-optic device is used for prompting a user through an acousto-optic signal when the battery pack is in a state needing maintenance.
8. The battery pack online health management system of claim 1, wherein: the user interaction module is also used for making a battery pack maintenance scheme according to the safety state of the battery pack.
9. The battery pack online health management system of claim 2, wherein: the monitoring module is also used for storing the maintenance record of the battery pack;
the knowledge design module is further configured to adjust the standard performance parameters according to the maintenance record.
10. The battery pack online health management system of claim 5,
the knowledge design module is also used for establishing a battery pack performance parameter curve graph according to the first performance parameter and the second performance parameter and sending the performance parameter curve graph to the user interaction module;
the user interaction module is further configured to present the performance parameter graph to a user.
11. An online health management method for a battery pack, comprising:
monitoring performance parameters of the battery pack and the single battery in the charging and discharging processes; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery;
determining the safety state of the battery pack according to the performance parameters, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state;
and displaying the safety state of the battery pack to a user.
Technical Field
The invention relates to the field of new energy automobiles, in particular to a battery pack online health management system and method.
Background
In recent years, the economic development of China is rapid, and the environmental pollution is increased year by year. The green trip is an important measure of solving environmental pollution, and environmental pollution's aggravation can be alleviated in the release of novel energy automobile, and the battery package is as an important component part of novel energy automobile and is deeply followed closely by scientific research personnel's concern.
The performance of the battery pack can be changed in the using process, and when a user uses a new energy automobile, the life safety of the user can be endangered due to the damage of the battery pack, so that the performance of the battery pack can be monitored in the charging and discharging processes of the battery pack.
Disclosure of Invention
The embodiment of the invention provides a battery pack online health management system and a battery pack online health management method.
In a first aspect, an embodiment of the present invention provides an online health management system for a battery pack, including: the system comprises a monitoring module, a knowledge design module and a user interaction module; the monitoring module is used for monitoring performance parameters of the battery pack and the single battery in the charging and discharging processes and sending the performance parameters to the knowledge design module; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery; the knowledge design module is used for determining the safety state of the battery pack according to the performance parameters and sending the safety state to the user interaction module, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state; the user interaction module is used for displaying the safety state of the battery pack to a user.
Optionally, the knowledge design module is specifically configured to compare the performance parameter with a standard performance parameter, and determine the safety state of the battery pack according to a comparison result.
Optionally, the knowledge design module is specifically configured to determine a charging state and a health state of the battery pack according to the performance parameter, and determine a safety state of the battery pack according to the charging state and the health state.
Optionally, the knowledge design module is further specifically configured to perform weighted summation on each of the performance parameters, the charging state, and the health state to obtain a weighting parameter, and determine the safety state of the battery pack according to the weighting parameter.
Optionally, the performance parameters include a first performance parameter in a current charging and discharging process of the battery pack and a second performance parameter in a historical charging and discharging process;
the knowledge design module is further used for determining the attenuation degree of the battery pack according to the first performance parameter and the second performance parameter; and determining the safety state of the battery pack according to the attenuation degree.
Optionally, the monitoring module is further configured to store the performance parameter;
the user interaction module is also used for calling and displaying the performance parameters by the monitoring module according to the request of the user.
Optionally, the user interaction module includes an acousto-optic device, and the acousto-optic device is used for prompting the user through an acousto-optic signal when the battery pack is in a state needing maintenance.
Optionally, the user interaction module is further configured to formulate a battery pack maintenance scheme according to the safety state of the battery pack.
Optionally, the monitoring module is further configured to store a maintenance record of the battery pack;
the knowledge design module is further configured to adjust the standard performance parameters according to the maintenance record.
Optionally, the knowledge design module is further configured to establish a battery pack performance parameter graph according to the first performance parameter and the second performance parameter, and send the performance parameter graph to the user interaction module; the user interaction module is further configured to present the performance parameter graph to a user. In a second aspect, an embodiment of the present invention further provides an online health management method for a battery pack, which monitors performance parameters of the battery pack and a single battery during charging and discharging processes; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery; determining the safety state of the battery pack according to the performance parameters, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state; and displaying the safety state of the battery pack to a user.
In the embodiment, the performance parameters of the battery pack and the single battery are monitored in the charging and discharging processes of the battery pack, the monitored performance parameters are transmitted to the knowledge design module, the knowledge design module is used for comparing the received performance parameters with the standard performance parameters, dividing the battery pack into two states of maintenance and maintenance-free, and transmitting the state of the battery pack to the user interaction module, and the user interaction module can show the state of the battery pack to a user. The system monitors the whole battery pack and the single batteries in the battery pack in the charging and discharging process of the battery pack, can more accurately analyze the safety state of the battery pack, timely reflects the state of the battery pack to a user, avoids the damage of the battery pack to influence the use safety of the user, and better ensures the safety of the user.
Drawings
Fig. 1 is a schematic diagram of an online health management system for a battery pack according to an embodiment;
fig. 2 is a schematic diagram of an online health management structure of a battery pack according to the present embodiment;
fig. 3 is a flowchart of a battery pack online health management method according to this embodiment.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
Fig. 1 is a schematic diagram of a battery pack online health management system according to this embodiment, where the battery pack online health management system according to this embodiment includes: a
This embodiment has also monitored battery pack in battery pack's performance parameter when monitoring battery pack performance parameter, mainly because the battery pack is passed through the series connection by a plurality of battery cells or parallelly connected the constitution, in the battery pack of series connection, if the performance parameter of one of them battery cell deviates, whole battery pack also can not normally work, consequently monitor battery pack in the battery pack battery cell's performance parameter can help the state of the whole battery pack of analysis for the state of whole battery pack is confirmed more accurately. The
In this embodiment, the
Specifically, the performance parameters of the battery pack are monitored in the battery charging and discharging process, if the detected performance parameters are too large in difference with standard parameters, the battery pack is classified into a state needing maintenance, the standard parameters refer to parameter values measured when the battery pack leaves a factory, and the standard performance parameters comprise standard capacities, standard terminal voltages, standard energies and standard temperatures of the battery pack and the single batteries. Illustratively, the temperature of the battery pack has a normal range value under the normal condition in the charging and discharging process, the monitoring module detects that the temperature of the battery pack exceeds the normal range value of the battery pack for a long time in the charging process of the battery pack, the knowledge design module classifies the battery pack into a state needing maintenance and transmits the state to the user interaction module, and the user interaction module reminds a user and staff of the charging station to stop charging the battery pack.
Optionally, the knowledge design module is specifically configured to determine a charging state and a health state of the battery pack according to the performance parameter, and determine a safety state of the battery pack according to the charging state and the health state.
Illustratively, the State of Charge (SOC) of the battery pack is defined as follows: SOC-remaining capacity/(rated capacity-capacity fade factor), where remaining capacity-rated capacity-net discharge-self discharge-temperature compensation. The residual capacity can be obtained by monitoring through the monitoring module, and the rated capacity is the electric quantity of the battery pack when the battery pack leaves a factory. In the knowledge design module, when the SOC is lower than the set threshold value, the knowledge design module classifies the battery pack as a maintenance-required state. The standard definition of State of Health (SOH) is the ratio of the capacity that a battery pack discharges at a certain rate from a fully charged State to a cut-off voltage under standard conditions to its corresponding nominal capacity (actual initial capacity), which is a reaction to the State of Health of the battery. The state of health of the battery pack may be defined from the perspective of the internal resistance of the battery: and when the SOH is lower than a set threshold value, the knowledge design module classifies the battery pack into a state needing maintenance. Determining the SOC and SOH of the battery pack may further improve the accuracy of the battery pack safety state determined by the knowledge design module.
Optionally, the knowledge design module is specifically configured to perform weighted summation on each performance parameter, the charge state, and the health state to obtain a weighted parameter, and determine the safety state of the battery pack according to the weighted parameter.
Specifically, different weight values can be set for each performance parameter, the charging state and the health state according to the influence degree of each performance parameter, the charging state and the health state on the safety of the battery pack, the performance parameters, the charging state and the health state of the battery pack are weighted and summed to obtain a weighting parameter, and the weighting parameter is compared with a standard weighting parameter to judge the safety state of the battery pack. Since the weighting parameters integrate the performance parameters, the state of charge and the state of health, the safety state determined by the weighting parameters is more accurate. Optionally, the performance parameters include a first performance parameter in a current charging and discharging process of the battery pack and a second performance parameter in a historical charging and discharging process; the knowledge design module is also used for determining the attenuation degree of the battery pack according to the first performance parameter and the second performance parameter; and determining the safety state of the battery pack according to the attenuation degree.
Specifically, the first performance parameter refers to a performance parameter monitored in the current charging and discharging process. The second performance parameter refers to a monitored performance parameter of the battery pack in a historical charging and discharging process, and may include performance parameters in multiple historical charging and discharging processes. The attenuation performance of the battery pack is also an important parameter for determining the safety state of the battery pack. The degree of attenuation of the battery pack may be determined based on the internal resistance of the battery pack. Along with the increase of the service time of the battery pack, the internal resistance of the battery pack is gradually increased, and the attenuation degree of the battery pack is higher when the increase rate of the internal resistance of the battery pack is higher. The internal resistances of the battery pack can be determined according to the first performance parameter and the second performance parameter, the internal resistance increase rate of the battery pack is determined according to the internal resistances, the attenuation degree of the battery pack is determined, and the safety state of the battery pack is determined according to the attenuation degree.
Optionally, the monitoring module is further configured to store the performance parameter; the user interaction module is also used for calling and displaying the performance parameters by the monitoring module according to the request of the user.
Specifically, in this embodiment, each battery pack is encoded, a data file is created for each battery pack, and the monitored performance parameters are stored in the data file of the battery pack. The user can inquire the performance parameters of all the histories of the battery pack by inputting the code of the battery pack.
Optionally, the user interaction module includes an acousto-optic device, and the acousto-optic device is used for prompting the user through an acousto-optic signal when the battery pack is in a state needing maintenance.
Illustratively, when the system monitors that a certain performance parameter of the battery pack or a monomer in the battery pack is too different from a standard parameter in the charging process of the battery pack, an acousto-optic device in the user interaction module gives an alarm and flashes red light to remind a user or a worker in the charging station to respond in time so as to prevent the battery pack from being damaged or exploding.
Optionally, the user interaction module is further configured to formulate a battery pack maintenance scheme according to the safety state of the battery pack.
Specifically, for the battery pack in a state needing maintenance, the user interaction module can analyze that different performance parameters of the battery pack are abnormal to formulate different maintenance plans, the battery pack with the abnormal performance parameters is maintained in time to prolong the service life of the battery pack, the maintenance steps can be simplified by formulating different maintenance plans, and maintenance personnel have pertinence in the process of maintaining the battery pack and shorten the maintenance time.
Optionally, the monitoring module is further configured to store a maintenance record of the battery pack; the knowledge design module is further configured to adjust the standard performance parameters based on the maintenance record.
Specifically, the maintenance record of the battery pack includes components for recording the maintenance times, the maintenance reasons and the maintenance of the battery pack. After the battery pack is maintained, after one or more single batteries are exemplarily replaced, the standard performance parameters are changed, the performance parameters can be more consistent with the current state of the battery by adjusting the performance parameters according to the maintenance records, and the battery state determined according to the updated performance parameters is more accurate. For example, after the battery pack is repaired to be used normally, the performance parameters of the battery pack can be monitored, and the performance parameters monitored for the first time after the battery pack is repaired are taken as the standard performance parameters of the battery pack. Optionally, the knowledge design module is further configured to establish a performance parameter graph of the battery pack according to the first performance parameter and the second performance parameter, and send the performance parameter graph to the user interaction module; the user interaction module is further configured to present the performance parameter graph to a user.
Specifically, by establishing a performance parameter curve graph, a user can visually see parameter changes of the battery in multiple charging and discharging processes, and visually know the performance changes of the battery. For example, taking a terminal voltage parameter of the battery pack as an example, an abscissa of the graph represents a date of charging of the battery pack, an ordinate of the graph represents a terminal voltage when the battery pack is fully charged, and the terminal voltage recorded during current charging and the terminal voltage recorded in history are plotted to show a change trend of the terminal voltage of the battery pack along with the use time.
Fig. 2 is a schematic structural diagram of a battery pack online health management system provided by this embodiment, referring to fig. 2, in a process of charging and discharging a battery pack on a charging and discharging machine, a monitoring module monitors performance parameters of the battery pack and transmits the monitored performance parameters to a knowledge design module, the processing process of the performance parameters by the knowledge design module includes establishing a history record of the battery pack, performing knowledge design, establishing a knowledge base, establishing an inference machine and establishing an interpreter, the history record includes a history charging record, a history discharging record and a history maintenance record of the battery pack, and the performing knowledge design includes estimating internal resistances, estimating attenuation degrees, calculating SOC and SOH of the battery pack and a single battery, and the like. The establishing of the knowledge base comprises the step of establishing a curve graph of the change of each performance parameter of the battery pack according to the historical record, and the knowledge base places the actually monitored performance parameter curve and the preset performance parameter curve of the battery pack when the battery pack leaves a factory in a coordinate system, so that a user can conveniently observe the difference between the actual performance parameter and the preset performance parameter. The inference engine is used for analyzing the safety state of the battery pack according to the historical records and the knowledge design results. The interpreter is used for sending the safety state of the battery pack, the reason for maintenance and the like to the user interaction module. And the user interaction module makes a corresponding maintenance plan for the battery pack in a state needing maintenance.
The present embodiment also provides a battery pack online health management method, and fig. 3 provides a battery pack online health management method for the present embodiment, and with reference to fig. 3, the method includes:
210. monitoring performance parameters of the battery pack and the single battery in the charging and discharging processes; the performance parameters comprise the capacity, terminal voltage, energy and temperature of the battery pack and the single battery;
220. determining the safety state of the battery pack according to the performance parameters, wherein the safety state comprises maintenance-needed state and maintenance-not-needed state;
230. the safety status of the battery pack is presented to the user.
The online health management method for the battery pack provided by the embodiment of the invention and the online health management system for the battery pack provided by any embodiment of the invention belong to the same inventive concept, have corresponding beneficial effects, and the detailed technical details in the embodiment are omitted, so that the online health management system for the battery pack provided by any embodiment of the invention is detailed.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
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