CN106814318A - The method for determining the life-span of lithium ion battery and determining estimated life modifying factor - Google Patents
The method for determining the life-span of lithium ion battery and determining estimated life modifying factor Download PDFInfo
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Abstract
公开了一种确定锂离子电池的寿命的方法。该方法包括：对锂离子电池进行充电；在第一时刻，获取该锂离子电池的第一荷电状态值；在第二时刻，获取该锂离子电池的第二荷电状态值；基于所获取的第一荷电状态值和第二荷电状态值，确定该锂离子电池的荷电状态区间；以及基于所确定的荷电状态区间、该锂离子电池的标称容量以及在充电过程中对该锂离子电池充入的容量，确定该锂离子电池的寿命。还公开了一种确定锂离子电池的估算寿命的修正因子的方法。
A method of determining the lifetime of a lithium-ion battery is disclosed. The method includes: charging the lithium-ion battery; at a first moment, acquiring a first state-of-charge value of the lithium-ion battery; at a second moment, acquiring a second state-of-charge value of the lithium-ion battery; Determine the state of charge range of the lithium-ion battery based on the first state of charge value and the second state of charge value; and based on the determined state of charge range, the nominal capacity of the lithium-ion battery and the charging process The charged capacity of the lithium-ion battery determines the life-span of the lithium-ion battery. A method of determining a correction factor for an estimated lifetime of a lithium-ion battery is also disclosed.
Description
技术领域technical field
本公开一般地涉及锂离子电池管理领域，更具体地，涉及确定锂离子电池的寿命的方法和确定锂离子电池的估算寿命的修正因子的方法。The present disclosure relates generally to the field of lithium-ion battery management, and more particularly, to methods of determining the life of a lithium-ion battery and methods of determining a correction factor for the estimated life of a lithium-ion battery.
背景技术Background technique
锂离子电池凭借其优异的性能在新能源汽车领域得到广泛的应用。在新能源汽车的整车使用寿命周期中，锂离子电池自身的寿命可能会随着活性材料的消耗而衰减。伴随着锂离子电池寿命的衰减，其充放电能力、自身容量以及能量等数值也会发生变化。因此，通过准确地估算锂离子电池的寿命，可以准确地评估锂离子电池的当前能力。Lithium-ion batteries are widely used in the field of new energy vehicles due to their excellent performance. In the life cycle of a new energy vehicle, the life of the lithium-ion battery itself may decay with the consumption of active materials. With the decay of lithium-ion battery life, its charge and discharge capacity, its own capacity and energy will also change. Therefore, by accurately estimating the lifetime of a Li-ion battery, the current capability of a Li-ion battery can be accurately assessed.
锂离子电池的寿命可包括日历寿命和循环寿命。一种现有的在线估算锂离子电池寿命的方法为：采用离线实验数据拟合来得到相关公式，然后带入软件中进行锂离子电池寿命的估算。然而，由于电芯之间存在差异，采用该方法对锂离子电池的寿命进行估算所得到的估算精度并不高。The life of a lithium-ion battery may include calendar life and cycle life. An existing online method for estimating the life of a lithium-ion battery is as follows: use off-line experimental data fitting to obtain relevant formulas, and then bring them into software to estimate the life of the lithium-ion battery. However, due to the differences between cells, the estimation accuracy obtained by using this method to estimate the life of lithium-ion batteries is not high.
发明内容Contents of the invention
因此，有必要提供一种具有更高精度的确定锂离子电池寿命的方法。Therefore, it is necessary to provide a method of determining the life of lithium-ion batteries with higher accuracy.
本公开的发明人意识到，通过在线修正来得到锂离子电池的实际容量比较困难，而通过比较在相同荷电状态(state of charge,SOC)区间内，当前锂离子电池对应的容量与出厂时锂离子电池所对应的容量比值来确定锂离子电池的当前寿命是可行的。The inventors of the present disclosure realize that it is difficult to obtain the actual capacity of the lithium-ion battery through online correction, and by comparing the capacity corresponding to the current lithium-ion battery in the same state of charge (state of charge, SOC) interval with the factory-time It is feasible to determine the current life of a lithium-ion battery by the capacity ratio corresponding to the lithium-ion battery.
基于上述考量，根据本公开的一个方面，在一个实施例中，提供了一种用于确定锂离子电池的寿命的方法。该方法包括：对锂离子电池进行充电；在第一时刻，获取该锂离子电池的第一荷电状态值；在第二时刻，获取该锂离子电池的第二荷电状态值；基于所获取的第一荷电状态值和第二荷电状态值，确定该锂离子电池的荷电状态区间；以及基于所确定的荷电状态区间、该锂离子电池的标称容量以及在充电过程中对该锂离子电池充入的容量，确定该锂离子电池的寿命。Based on the above considerations, according to one aspect of the present disclosure, in one embodiment, a method for determining the lifespan of a lithium-ion battery is provided. The method includes: charging the lithium-ion battery; at a first moment, acquiring a first state-of-charge value of the lithium-ion battery; at a second moment, acquiring a second state-of-charge value of the lithium-ion battery; Determine the state of charge range of the lithium-ion battery based on the first state of charge value and the second state of charge value; and based on the determined state of charge range, the nominal capacity of the lithium-ion battery and the charging process The charged capacity of the lithium-ion battery determines the life-span of the lithium-ion battery.
在一个例子中，确定锂离子电池的寿命可通过以下公式来实现：In one example, determining the life of a Li-Ion battery can be accomplished with the following formula:
SOH＝C/(SOC2-SOC1)/CRate SOH＝C/(SOC2-SOC1)/C Rate
其中，SOH表示所确定的锂离子电池的寿命，C表示对锂离子电池充入的容量，SOC1表示第一荷电状态值，SOC2表示第二荷电状态值，(SOC2-SOC1)表示荷电状态区间，CRate表示标称容量。Among them, SOH represents the determined life of the lithium-ion battery, C represents the capacity charged to the lithium-ion battery, SOC1 represents the first state of charge value, SOC2 represents the second state of charge value, (SOC2-SOC1) represents the charge State interval, C Rate represents the nominal capacity.
在一个例子中，第一时刻为充电起始时刻，获取该锂离子电池的第一荷电状态值包括：在该充电起始时刻，判断该锂离子电池是否已静置预定时长；如果该锂离子电池已静置预定时长，基于该锂离子电池的当前开路电压并且根据该锂离子电池的开路电压-荷电状态曲线，确定该锂离子电池的第一荷电状态值。In one example, the first moment is the starting moment of charging, and obtaining the first state of charge value of the lithium-ion battery includes: at the starting moment of charging, judging whether the lithium-ion battery has been left standing for a predetermined period of time; if the lithium-ion battery The ion battery has been standing for a predetermined time, based on the current open circuit voltage of the lithium ion battery and according to the open circuit voltage-state of charge curve of the lithium ion battery, determine the first state of charge value of the lithium ion battery.
在一个例子中，第二时刻为充电结束时刻，获取该锂离子电池的第二荷电状态值包括：判断对该锂离子电池的充电是否已进入涓流充电期；如果对该锂离子电池的充电已进入涓流充电期，获取该锂离子电池在该涓流充电期的电压；以及在该充电结束时刻，基于该锂离子电池在该涓流充电期的电压并根据该锂离子电池的开路电压-荷电状态曲线，确定该锂离子电池的第二荷电状态值。In one example, the second moment is the charging end moment, and obtaining the second state of charge value of the lithium-ion battery includes: judging whether the charging of the lithium-ion battery has entered a trickle charge period; if the charging of the lithium-ion battery Charging has entered the trickle charging period, obtaining the voltage of the lithium-ion battery during the trickle charging period; and at the end of the charging, based on the voltage of the lithium-ion battery during the trickle charging period and according to the open circuit of the lithium-ion battery A voltage-state-of-charge curve is used to determine a second state-of-charge value of the lithium-ion battery.
该锂离子电池包括例如，三元材料锂离子电池。The lithium ion battery includes, for example, a ternary material lithium ion battery.
相比于现有技术中的估算锂离子电池寿命的方法，本公开的各实施例中确定锂离子电池寿命的方法能够获得更为准确的锂离子电池的寿命。Compared with the method for estimating the life of the lithium-ion battery in the prior art, the method for determining the life of the lithium-ion battery in each embodiment of the present disclosure can obtain a more accurate life of the lithium-ion battery.
本公开的发明人意识到，基于通过上述各实施例的方法确定的锂离子电池的寿命以及通过现有的在线估算锂离子电池寿命的方法所得到的电池估算寿命，可以得到一个修正因子。通过该修正因子，可以对之后通过现有的在线估算锂离子电池寿命的方法估算得到的电池估算寿命进行修正从而得到更为精确的锂离子电池的寿命。The inventors of the present disclosure realize that a correction factor can be obtained based on the life of the lithium-ion battery determined by the methods of the above embodiments and the estimated life of the battery obtained by the existing online method for estimating the life of the lithium-ion battery. With this correction factor, the estimated life of the battery obtained through the existing online method for estimating the life of the lithium-ion battery can be corrected to obtain a more accurate life of the lithium-ion battery.
基于此，根据本公开的另一个方面，在一个实施例中，提供了一种用于确定锂离子电池的估算寿命的修正因子的方法。该方法包括：对锂离子电池进行充电；在第一时刻，获取该锂离子电池的第一荷电状态值；在第二时刻，获取该锂离子电池的第二荷电状态值；基于所获取的第一荷电状态值和第二荷电状态值，确定该锂离子电池的荷电状态区间；基于所确定的荷电状态区间、该锂离子电池的标称容量以及在充电过程中对该锂离子电池充入的容量，确定该锂离子电池的寿命；以及基于所确定的该锂离子电池的寿命以及该锂离子电池的估算寿命，确定该锂离子电池的估算寿命的修正因子。其中，该锂离子电池的估算寿命可以通过包括现有的在线估算锂离子电池寿命的方法在内的所有已知的或未来发展出的估算锂离子电池寿命的方法来估算得到。Based on this, according to another aspect of the present disclosure, in one embodiment, a method for determining a correction factor for an estimated lifetime of a lithium-ion battery is provided. The method includes: charging the lithium-ion battery; at a first moment, acquiring a first state-of-charge value of the lithium-ion battery; at a second moment, acquiring a second state-of-charge value of the lithium-ion battery; The first state of charge value and the second state of charge value of the lithium-ion battery determine the state of charge range of the lithium-ion battery; based on the determined state of charge range, the nominal capacity of the lithium-ion battery and the The charged capacity of the lithium-ion battery, determining the lifetime of the lithium-ion battery; and determining a correction factor for the estimated lifetime of the lithium-ion battery based on the determined lifetime of the lithium-ion battery and the estimated lifetime of the lithium-ion battery. Wherein, the estimated service life of the lithium-ion battery can be estimated by all known or future-developed methods for estimating the service life of the lithium-ion battery, including existing online methods for estimating the service life of the lithium-ion battery.
在一个例子中，确定该锂离子电池的寿命可通过以下公式来实现：In one example, determining the lifetime of the Li-ion battery can be achieved by the following formula:
SOH＝C/(SOC2-SOC1)/CRate SOH＝C/(SOC2-SOC1)/C Rate
其中，SOH表示所确定的锂离子电池的寿命，C表示对锂离子电池充入的容量，SOC1表示第一荷电状态值，SOC2表示第二荷电状态值，(SOC2-SOC1)表示荷电状态区间，CRate表示标称容量。Among them, SOH represents the determined life of the lithium-ion battery, C represents the capacity charged to the lithium-ion battery, SOC1 represents the first state of charge value, SOC2 represents the second state of charge value, (SOC2-SOC1) represents the charge State interval, C Rate represents the nominal capacity.
在一个例子中，确定该锂离子电池的估算寿命的修正因子可通过以下公式来实现：In one example, the correction factor for determining the estimated lifetime of the Li-ion battery may be implemented by the following formula:
ΔSOH＝SOH-SOH’ΔSOH=SOH-SOH'
其中，ΔSOH表示修正因子，SOH表示所确定的该锂离子电池的寿命，SOH’表示该锂离子电池的估算寿命。Wherein, ΔSOH represents a correction factor, SOH represents the determined life of the lithium-ion battery, and SOH' represents the estimated life of the lithium-ion battery.
通过本公开的各实施例所确定的修正因子，可以对之后获得的该锂离子电池的估算寿命进行修正，从而获得更为精确的锂离子电池的寿命。With the correction factors determined in the various embodiments of the present disclosure, the estimated life of the lithium-ion battery obtained later can be corrected, so as to obtain a more accurate life of the lithium-ion battery.
附图说明Description of drawings
本公开的其它特征、特点、优点和益处通过以下结合附图的详细描述将变得更加显而易见。Other features, features, advantages and benefits of the present disclosure will become more apparent from the following detailed description in conjunction with the accompanying drawings.
图1示出了根据本公开的一个实施例的确定锂离子电池的寿命的方法；以及FIG. 1 shows a method of determining the lifetime of a lithium-ion battery according to one embodiment of the present disclosure; and
图2示出了根据本公开的一个实施例的确定锂离子电池的估算寿命的修正因子的方法。FIG. 2 illustrates a method of determining a correction factor for an estimated lifetime of a lithium-ion battery according to one embodiment of the present disclosure.
具体实施方式detailed description
本公开的基本构思在于，在特定的荷电状态区间内，锂离子电池充入的容量与该锂离子电池的标称容量以及该锂离子电池的寿命相关，通过该关系，在已知锂离子电池的标称容量、特定的荷电状态区间以及该锂离子电池的充入容量的情况下，可以得到该锂离子电池的寿命信息。The basic idea of the present disclosure is that, within a specific state of charge interval, the charged capacity of a lithium-ion battery is related to the nominal capacity of the lithium-ion battery and the life of the lithium-ion battery. Through this relationship, in the known lithium-ion battery In the case of the nominal capacity of the battery, a specific state of charge interval, and the charging capacity of the lithium-ion battery, the life information of the lithium-ion battery can be obtained.
以下结合附图对本公开的各个方面的实施例进行描述。Embodiments of various aspects of the present disclosure are described below with reference to the accompanying drawings.
图1示出了根据本公开的一个实施例的确定锂离子电池的寿命的方法流程图。参照图1，在块101中，开始对该锂离子电池进行充电。例如，可以通过车载充电器对该锂离子电池进行充电。FIG. 1 shows a flowchart of a method for determining the life of a lithium-ion battery according to an embodiment of the present disclosure. Referring to FIG. 1 , in block 101 , charging of the Li-ion battery is initiated. For example, the lithium-ion battery can be charged by an on-board charger.
在块102中，在充电过程中的第一时刻，获取该锂离子电池的第一荷电状态值SOC1。也就是说，该第一荷电状态值SOC1对应的时间点就是充电过程中的该第一时刻。在一个例子中，如果该锂离子电池的开路电压(open circuit voltage,OCV)与荷电状态呈现特定的关系，那么可以通过该锂离子电池的开路电压来获取相对应的荷电状态值。譬如，对于三元材料锂离子电池而言，可以根据该三元材料锂离子电池的开路电压-荷电状态曲线，并基于所获得的该锂离子电池的开路电压来获取该锂离子电池的荷电状态值。In block 102, at a first moment in the charging process, a first state of charge value SOC1 of the lithium-ion battery is obtained. That is to say, the time point corresponding to the first state of charge value SOC1 is the first moment in the charging process. In an example, if the open circuit voltage (open circuit voltage, OCV) of the lithium ion battery has a specific relationship with the state of charge, then the corresponding state of charge value can be obtained through the open circuit voltage of the lithium ion battery. For example, for a ternary material lithium ion battery, the charge of the lithium ion battery can be obtained based on the obtained open circuit voltage of the lithium ion battery based on the open circuit voltage-state of charge curve of the ternary material lithium ion battery. power state value.
在一个例子中，该第一时刻可以是充电起始时刻。在该锂离子电池的开路电压与荷电状态呈现特定关系的情形下，基于该锂离子电池在该充电起始时刻的开路电压，可以获取相对应的第一荷电状态值SOC1。In one example, the first moment may be the charging start moment. In the case that the open-circuit voltage of the lithium-ion battery has a specific relationship with the state of charge, the corresponding first state-of-charge value SOC1 can be obtained based on the open-circuit voltage of the lithium-ion battery at the charging start moment.
有利地，为了获得更为准确的第一荷电状态值SOC1，可以先将该锂离子电池静置一段时间，以使其开路电压是一个稳定的电压。基于此，在充电起始时刻，可以先判断该锂离子电池是否已静置了预定时长。该预定时长可以是能够确保该锂离子电池的开路电压是一个较为稳定的电压的任意适当的数值。可以通过多种方式来实现判断该锂离子电池是否已静置预定时长，例如，可以通过判断该锂离子电池的控制器，譬如电池管理系统(BMS)的下电时长是否已达到预定值来判断该锂离子电池是否已静置了预定时长。类似地，该预定值可以是能够确保该锂离子电池的开路电压是一个较为稳定的电压的任意适当的数值，例如1小时。一般而言，锂离子电池的静置时长大于该锂离子电池的控制器的下电时长，因此，在预定值为例如1小时的情形下，该锂离子电池的静置时间，也即该预定时长可能已超过1小时。Advantageously, in order to obtain a more accurate first state-of-charge value SOC1, the lithium-ion battery can be left to stand for a period of time, so that its open-circuit voltage is a stable voltage. Based on this, at the starting moment of charging, it can be judged first whether the lithium-ion battery has been left standing for a predetermined period of time. The predetermined duration can be any appropriate value that can ensure that the open circuit voltage of the lithium-ion battery is a relatively stable voltage. Judging whether the lithium-ion battery has been left standing for a predetermined period of time can be achieved in a variety of ways, for example, it can be judged by judging whether the controller of the lithium-ion battery, such as the power-off period of the battery management system (BMS), has reached a predetermined value Whether the lithium-ion battery has been resting for a predetermined amount of time. Similarly, the predetermined value may be any appropriate value that can ensure that the open circuit voltage of the lithium-ion battery is a relatively stable voltage, such as 1 hour. Generally speaking, the standing time of the lithium-ion battery is longer than the power-off time of the controller of the lithium-ion battery. Therefore, in the case of a predetermined value such as 1 hour, the standing time of the lithium-ion battery, that is, the predetermined May have been longer than 1 hour.
当判断得到该锂离子电池已静置了该预定时长时，基于该锂离子电池的当前开路电压并且根据该锂离子电池的开路电压-荷电状态曲线，就可以确定该锂离子电池的第一荷电状态值SOC1。When it is judged that the lithium-ion battery has stood still for the predetermined period of time, based on the current open-circuit voltage of the lithium-ion battery and according to the open-circuit voltage-state-of-charge curve of the lithium-ion battery, the first state of the lithium-ion battery can be determined. State of charge value SOC1.
在块103中，在充电过程中的第二时刻，获取该锂离子电池的第二荷电状态值SOC2。也就是说，该第二荷电状态值SOC2对应的时间点就是充电过程中的该第二时刻。在一个例子中，该第二时刻可以是充电结束时刻。在该锂离子电池的开路电压与荷电状态呈现特定关系的情形下，基于该锂离子电池在该充电结束时刻的开路电压，可以获取相对应的第二荷电状态值SOC2。In block 103, at a second moment in the charging process, a second state-of-charge value SOC2 of the lithium-ion battery is obtained. That is to say, the time point corresponding to the second state of charge value SOC2 is the second moment in the charging process. In an example, the second moment may be the charging end moment. In the case that the open circuit voltage of the lithium ion battery has a specific relationship with the state of charge, based on the open circuit voltage of the lithium ion battery at the end of charging, the corresponding second state of charge value SOC2 can be obtained.
通常地，在对锂离子电池进行充电的末期，充电电流已十分小，属于涓流充电期，在这种电流下，锂离子电池的电压已基本接近于开路电压，因此，在该锂离子电池的开路电压与荷电状态之间呈现特定关系的情形下，基于在该涓流充电期的电压，可以获取相对应的该锂离子电池的第二荷电状态值。基于此，在充电过程中，可以判断对该锂离子电池的充电是否已进入涓流充电期。如果对该锂离子电池的充电已进入涓流充电期，则可以获取该锂离子电池在涓流充电期的电压。然后，在充电结束时刻，基于所获取的该锂离子电池在涓流充电期的电压，并根据该锂离子电池的开路电压-荷电状态曲线，可以确定该锂离子电池的第二荷电状态值SOC2。Usually, at the end of charging the lithium-ion battery, the charging current is very small, which belongs to the trickle charging period. Under this current, the voltage of the lithium-ion battery is basically close to the open circuit voltage. Therefore, in this lithium-ion battery In the case that there is a specific relationship between the open circuit voltage and the state of charge, based on the voltage in the trickle charging period, the corresponding second state of charge value of the lithium-ion battery can be obtained. Based on this, during the charging process, it can be judged whether the charging of the lithium-ion battery has entered the trickle charging period. If the charging of the lithium-ion battery has entered a trickle charging period, the voltage of the lithium-ion battery in the trickle charging period can be obtained. Then, at the end of charging, based on the obtained voltage of the lithium-ion battery in the trickle charging period, and according to the open-circuit voltage-state-of-charge curve of the lithium-ion battery, the second state of charge of the lithium-ion battery can be determined Value SOC2.
在块104中，基于第一荷电状态值SOC1和第二荷电状态值SOC2，确定该锂离子电池的荷电状态区间(SOC2-SOC1)。In block 104, based on the first state of charge value SOC1 and the second state of charge value SOC2, a state of charge interval (SOC2-SOC1) of the lithium-ion battery is determined.
对于在第一时刻，例如充电起始时刻至第二时刻，例如充电结束时刻期间对该锂离子电池充入的容量C，可以通过例如在该第一时刻至该第二时刻的时间内对充入该锂离子电池的电流进行积分来获得。For the capacity C charged to the lithium-ion battery during the first moment, for example, from the charging start moment to the second moment, such as the charging end moment, for example, charging can be performed during the time from the first moment to the second moment. It is obtained by integrating the current flowing into the lithium-ion battery.
在块105中，基于所确定的该锂离子电池的荷电状态区间(SOC2-SOC1)、该锂离子电池的标称容量CRate以及在充电过程中对该锂离子电池充入的容量C，确定该锂离子电池的寿命SOH。In block 105, based on the determined state of charge range (SOC2-SOC1) of the lithium-ion battery, the nominal capacity C Rate of the lithium-ion battery and the capacity C charged to the lithium-ion battery during charging, Determine the lifetime SOH of the Li-ion battery.
在一个例子中，可以通过以下公式来确定该锂离子电池的寿命SOH：In one example, the life SOH of the lithium-ion battery can be determined by the following formula:
SOH＝C/(SOC2-SOC1)/CRate SOH＝C/(SOC2-SOC1)/C Rate
相比于现有技术中的估算锂离子电池寿命的方法，本公开的各实施例的确定锂离子电池寿命的方法能够获得更为准确的锂离子电池的寿命。Compared with the method for estimating the life of a lithium-ion battery in the prior art, the method for determining the life of a lithium-ion battery in various embodiments of the present disclosure can obtain a more accurate life of the lithium-ion battery.
可以理解的是，由于根据本公开的各实施例确定的锂离子电池的寿命更为精确，因此，基于根据本公开的各实施例确定的锂离子电池的寿命以及基于根据现有的在线估算锂离子电池寿命的方法估算得到的电池估算寿命，可以得到一个锂离子电池寿命的修正因子。通过该修正因子，可以对之后通过现有的在线估算锂离子电池寿命的方法估算得到的电池估算寿命进行修正。换言之，有了该修正因子，即使在之后的某个时间段内采用的是现有的在线估算锂离子电池寿命的方法来估算得到锂离子电池的估算寿命，也可以使用该修正因子来进行修正从而得到更为准确的锂离子电池的寿命。It can be understood that, since the life of the lithium-ion battery determined according to the various embodiments of the present disclosure is more accurate, based on the life of the lithium-ion battery determined according to the various embodiments of the present disclosure and based on the existing online estimation of lithium The estimated life of the battery obtained by estimating the life of the ion battery can obtain a correction factor for the life of the lithium-ion battery. With this correction factor, the estimated life of the battery obtained through the existing online method for estimating the life of the lithium-ion battery can be corrected. In other words, with the correction factor, even if the existing online lithium-ion battery life estimation method is used to estimate the estimated life of the lithium-ion battery in a certain period of time, the correction factor can also be used for correction So as to get a more accurate lithium-ion battery life.
基于此，本公开在另一个实施例中提供了一种确定锂离子电池的估算寿命的修正因子的方法。参照图2，该方法的块201、202、203、204和205执行的功能类似于图1中的块101、102、103、104和105，其区别在于，图2还包括块206。在该块206中，基于在块205中确定的该锂离子电池的寿命以及基于所估算的该锂离子电池的估算寿命，确定该锂离子电池的估算寿命的修正因子。Based on this, the present disclosure provides, in another embodiment, a method of determining a correction factor for an estimated lifetime of a lithium-ion battery. Referring to FIG. 2 , blocks 201 , 202 , 203 , 204 and 205 of the method perform functions similar to blocks 101 , 102 , 103 , 104 and 105 in FIG. 1 , the difference being that FIG. 2 also includes block 206 . In the block 206, a correction factor for the estimated lifetime of the lithium-ion battery is determined based on the determined lifetime of the lithium-ion battery in block 205 and based on the estimated estimated lifetime of the lithium-ion battery.
在一个例子中，可以通过下式来确定该锂离子电池的估算寿命的修正因子：In one example, the correction factor for the estimated lifetime of the Li-ion battery can be determined by the following equation:
ΔSOH＝SOH-SOH’ΔSOH=SOH-SOH'
其中，ΔSOH表示修正因子，SOH表示所确定的该锂离子电池的寿命，SOH’表示所估算的该锂离子电池的估算寿命。Wherein, ΔSOH represents a correction factor, SOH represents the determined life of the lithium-ion battery, and SOH' represents the estimated estimated life of the lithium-ion battery.
需要说明的是，该锂离子电池的估算寿命SOH’可以通过包括现有的在线估算锂离子电池寿命的方法在内的所有已知的或未来发展出的估算锂离子电池寿命的方法来估算得到。It should be noted that the estimated life SOH' of the lithium-ion battery can be estimated by all known or future-developed methods for estimating the life of lithium-ion batteries, including the existing online methods for estimating the life of lithium-ion batteries .
本领域技术人员应当理解，上面公开的各个实施例可以在不偏离发明实质的情况下做出各种变形和修改。因此，本公开的保护范围应当由所附的权利要求书来限定。Those skilled in the art should understand that various variations and modifications can be made to the above-disclosed embodiments without departing from the essence of the invention. Therefore, the protection scope of the present disclosure should be defined by the appended claims.
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