WO2023123767A1 - 电池充电剩余时间的确定方法和系统 - Google Patents

电池充电剩余时间的确定方法和系统 Download PDF

Info

Publication number
WO2023123767A1
WO2023123767A1 PCT/CN2022/089069 CN2022089069W WO2023123767A1 WO 2023123767 A1 WO2023123767 A1 WO 2023123767A1 CN 2022089069 W CN2022089069 W CN 2022089069W WO 2023123767 A1 WO2023123767 A1 WO 2023123767A1
Authority
WO
WIPO (PCT)
Prior art keywords
charging
battery
current
charging current
voltage
Prior art date
Application number
PCT/CN2022/089069
Other languages
English (en)
French (fr)
Inventor
王海将
孙淑婷
梁旭
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to KR1020227027813A priority Critical patent/KR20230106123A/ko
Priority to EP22744636.6A priority patent/EP4227695A4/en
Priority to JP2022547892A priority patent/JP2024503766A/ja
Priority to US18/058,008 priority patent/US20230204672A1/en
Publication of WO2023123767A1 publication Critical patent/WO2023123767A1/zh

Links

Images

Classifications

    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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

Definitions

  • the present application relates to the technical field of batteries, in particular to a method and system for determining the remaining charging time of a battery.
  • the charging speed and charging time are the most concerned issues for car owners, especially the charging time not only affects the car owner's car use time but also affects the car owner's car use arrangement.
  • the charging time is mostly calculated by calculating the remaining charging time during charging to inform the car owner in advance, so as to provide a basis for the car owner's subsequent car use time and arrangements.
  • the algorithm error of the remaining time of battery charging is relatively large, which makes it inconvenient for car owners to use the car and the car experience is poor.
  • the present application provides a method and system for determining the remaining battery charging time, which can more accurately determine the current battery charging remaining time.
  • the present application provides a method for determining the remaining charging time of a battery, including: obtaining a first charging current, the first charging current is the current charging current of the battery; determining a second charging current, the second charging current is the battery charging current The charging current during charging; according to the first charging current and the second charging current, determine the average value of the charging current; according to the average value of the charging current, determine the remaining charging time.
  • a method for determining the remaining time of battery charging can be realized. According to the current charging current of the battery and the charging current when the battery is fully charged, the average value of the charging current is determined, and then the charging current is determined according to the average charging current. time left. In this way, the error introduced in the calculation process by using the real-time output current value can be greatly reduced, and the remaining time of battery charging can be obtained more accurately in the initial stage of charging, so that the calculated remaining time of battery charging is closer to the actual charging time.
  • the calculation results are provided to car owners, charging stations, etc., which is convenient for car owners to arrange the use of cars reasonably, and can also make the charging planning of charging stations more scientific and reliable.
  • determining the second charging current includes: determining the second charging current for this charging according to the first full charging voltage and the charging power of the charging device during this charging, wherein the first full charging voltage Calculated value for battery charging cut-off voltage.
  • the charging current when fully charged this time is obtained.
  • Using this method to estimate the calculation accuracy of the charging current when fully charged this time is more accurate, which is convenient for subsequent accurate determination of the remaining battery charging time.
  • determining the second charging current includes: determining the second charging current for this charging according to the second full charging voltage and the charging power of the charging device during this charging, wherein the second full charging voltage It is the actual value of the battery charging cut-off voltage during the last charging.
  • the actual value of the battery charging cut-off voltage during the last charging is recorded.
  • the cut-off voltage of the battery charge is related to the state of health (SOH) of the battery and will change with the number of charges, the actual charge cut-off voltage of the battery during the last charge can be used to more accurately calculate the charging current when it is fully charged this time. Therefore, the calculation result of the battery charging remaining time is more reliable.
  • the present application also provides a system for determining the remaining charging time of the battery, which is characterized in that it includes a processing module, and the processing module is used to: acquire the first charging current, the first charging current is the current charging current of the battery Charging current; determine the second charging current, the second charging current is the charging current when the battery is fully charged; determine the average charging current according to the first charging current and the second charging current; determine the remaining charging time according to the average charging current.
  • the processing module is further configured to: determine the second charging current for this charging according to the first full charging voltage and the charging power of the charging device during this charging, wherein the first full charging voltage is Calculated value of battery charge cut-off voltage.
  • the processing module is further configured to: determine the second charging current for this charging according to the second full charging voltage and the charging power of the charging device during this charging, wherein the second full charging voltage is The actual value of the battery charge cut-off voltage at the last charge.
  • the system further includes a storage module, which is used for storing the second full charge voltage.
  • the present application also provides a battery management system, including a processor and a memory, the memory is used to store a computer program, and the processor is used to call the computer program to execute the method of any possible embodiment in the first aspect above.
  • the present application further provides a readable storage medium for storing a computer program, and the computer program is used to execute the method of any possible embodiment in the first aspect above.
  • Fig. 1 is a schematic structural diagram of a charging system disclosed in an embodiment of the present application
  • Fig. 2 is a schematic flowchart of a method for determining the remaining charging time of a battery disclosed in an embodiment of the present application
  • Fig. 3 is a schematic flowchart of a method for determining a second charging current disclosed in an embodiment of the present application
  • Fig. 4 is a schematic flowchart of another method for determining a second charging current disclosed in an embodiment of the present application
  • Fig. 5 is a schematic flowchart of another method for determining the remaining charging time of a battery disclosed in an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a battery management module disclosed in an embodiment of the present application.
  • the charging time not only affects the car owner's car use time, but also affects the car owner's car use arrangement.
  • the charging time is mostly calculated by software algorithm, and the remaining charging time is calculated during charging to inform the car owner in advance, so as to provide a basis for the car owner's subsequent car use time and arrangements.
  • remaining time of charging remaining capacity/charging current output by the charging pile in real time.
  • SOC state of charge
  • SOC battery state of charge
  • the present application provides a method and system for determining the remaining battery charging time.
  • Fig. 1 shows a structure diagram of a charging system applicable to an embodiment of the present application.
  • the charging system 100 may include: a charging device 110 and a battery system 120 .
  • the battery system 120 may be a battery system in an electric vehicle (including a pure electric vehicle and a plug-in hybrid electric vehicle) or a battery system in other application scenarios.
  • the battery 121 can be any type of battery, including but not limited to: lithium ion battery, lithium metal battery, lithium sulfur battery and so on.
  • the battery 121 in the embodiment of the present application can be a battery cell/battery monomer (cell), or a battery module or a battery pack.
  • a battery module or a battery pack can be composed of multiple batteries connected in series and in parallel. Formation, in the embodiment of the present application, the specific type and scale of the battery 121 are not specifically limited.
  • the battery system 120 is generally equipped with a battery management system (battery management system, BMS) 122 for monitoring The state of the battery 121 .
  • BMS battery management system
  • the BMS 122 can be integrated with the battery 121 and set in the same device/device, or, the BMS 122 can also be set outside the battery 121 as an independent device/device.
  • the charging device 110 is a device for supplementing electric energy for the battery 121 in the battery system 120 and/or controlling the discharge of the battery 121 .
  • the charging device 110 in the embodiment of the present application may be an ordinary charging pile, a super charging pile, a charging pile supporting a vehicle to grid (V2G) mode, or a charging device capable of charging a battery, etc.
  • the embodiment of the present application does not limit the specific type and specific application scenarios of the charging device 110 .
  • the charging device 110 can be connected to the battery 121 through the electric wire 130, and connected to the BMS 122 through the communication line 140, wherein the communication line 140 is used to realize the information exchange between the charging device 110 and the BMS .
  • the communication line 140 includes, but is not limited to, a controller area network (control area network, CAN) communication bus or a daisy chain (daisy chain) communication bus.
  • a controller area network control area network, CAN
  • daisy chain daisy chain
  • the charging device 110 can also communicate with the BMS 122 through a wireless network.
  • the embodiment of the present application does not specifically limit the wired communication type or wireless communication type between the charging and discharging device and the BMS 122.
  • FIG. 2 shows a method 200 for determining the remaining charging time of the battery according to an embodiment of the present application, which is used to determine the remaining charging time of the battery 121 during the charging process.
  • the method 200 may specifically include some or all of the following steps.
  • Step 210 Obtain a first charging current.
  • the first charging current is the current charging current of the battery.
  • the charging current of the battery at the current moment can be obtained specifically by obtaining the current output current of the charging pile, or by sampling the current charging current of the battery. This application does not specifically limit the specific method of obtaining the charging current.
  • Step 220 Determine the second charging current.
  • the second charging current is the charging current when the battery is fully charged.
  • the second charging current for this charging can be determined according to the first full charging voltage, that is, the calculated value of the battery charging cut-off voltage, and the charging power of the charging device during this charging; it can also be determined according to the second full charging voltage , that is, the actual value of the battery charging cut-off voltage during the last charging, and the charging power of the charging device during this charging, determine the second charging current for this charging.
  • Step 230 Determine the average value of the charging current according to the first charging current and the second charging current.
  • the average value of the charging current can be obtained by adding and averaging the first charging current and the second charging current at this time.
  • Step 240 Determine the remaining charging time according to the average value of the charging current.
  • remaining battery charging time remaining battery capacity/average value of charging current
  • the average value of the charging current can be determined, and then the remaining charging time can be determined according to the average value of the charging current.
  • the error introduced in the calculation process by using the real-time output current value can be greatly reduced, and the remaining time of battery charging can be accurately obtained at the initial stage of charging, so that the calculated remaining time of battery charging is closer to the actual charging time.
  • the calculation results are provided to car owners, charging stations, etc., which is convenient for car owners to arrange for reasonable use of cars, and can also make charging planning for charging stations more scientific and reliable.
  • determining the second charging current in step 220 may be implemented through method 221 and method 222 .
  • Method 221 specifically includes:
  • Step 2211 Determine the first full charge voltage.
  • the first full charge voltage is a calculated value of the battery charge cut-off voltage.
  • Step 2212 Obtain the charging power of the charging device during this charging.
  • Step 2213 Determine the second charging current for this charging according to the first full charging voltage and the charging power of the charging device during this charging.
  • the second charging current is the charging current when the battery is fully charged.
  • the output charging power during the charging process is constant.
  • the battery can be determined according to the cut-off voltage and the charging power of the charging device during this charging.
  • the charging current that is, the second charging current, and then perform steps 230 and 240 to determine the remaining battery charging time.
  • Method 222 specifically includes:
  • Step 2221 Obtain the second full charge voltage.
  • the second full charge voltage is the actual value of the battery charge cut-off voltage during the last charge.
  • the storage module may be a nonvolatile memory (Nonvolatile memory, NVM), and the actual value of the battery charging cut-off voltage during the last charging process may be stored as an NVM variable.
  • Step 2222 Obtain the charging power of the charging device during this charging.
  • Step 2223 Determine the second charging current for this charging according to the second full charging voltage and the charging power of the charging device during this charging.
  • the second charging current is the charging current when the battery is fully charged.
  • the battery charging cut-off voltage is related to the battery state of health (SOH) and the voltage value of the single cell. Therefore, as the charging times increase, the SOH gradually decreases and the voltage value of the single cell changes.
  • the actual value of the battery charging cut-off voltage is related to The error between the calculated values will become larger and larger.
  • the above method 222 records and calls the actual value of the battery charging cut-off voltage in the last charging, and determines the charging current when the battery is fully charged according to the cut-off voltage and the charging power of the charging device, and then performs steps 230 and 240 to determine the battery voltage. Remaining charging time.
  • the execution method 200 can only execute the method 221 or the method 222; or the method 221 or the method 222 can be selected based on the battery aging degree according to the change of the battery state.
  • Figure 5 is a schematic flow chart of a possible implementation based on the above method.
  • Method 500 may specifically include:
  • Step 510 Charging starts.
  • Step 520 Select a calculation scheme according to preset conditions.
  • the calculation scheme may be selected according to preset judgment conditions such as charging times or battery aging degree. Choosing an appropriate calculation method based on the specific conditions of the battery can make the calculation result more accurate.
  • the method 221 is selected, and now enter step 531;
  • the method 222 enters step 532 now.
  • Step 531 Obtain a first charging current.
  • the first charging current is the current charging current of the battery.
  • Step 541 Determine the first full charge voltage.
  • the first full charge voltage is a calculated value of the battery charge cut-off voltage.
  • Step 551 Obtain the charging power of the charging device during this charging.
  • Step 561 Determine the second charging current for this charging.
  • the second charging current is the charging current when the battery is fully charged.
  • Step 532 Obtain the first charging current.
  • the first charging current is the current charging current of the battery.
  • Step 542 Obtain the second full charge voltage.
  • the second full charge voltage is the actual value of the battery charge cut-off voltage during the last charge.
  • Step 552 Obtain the charging power of the charging device during this charging.
  • Step 562 Determine the second charging current for this charging.
  • the second charging current is the charging current when the battery is fully charged.
  • Step 570 Determine the charging current average value.
  • the first charging current and the second charging current at this time are summed and then averaged to obtain an average value of the charging current.
  • Step 580 Determine the remaining charging time.
  • remaining battery charging time remaining battery capacity/average value of charging current
  • Step 590 Determine whether charging is complete.
  • the storage module is used for storing the second full charge voltage.
  • the processing module is used to: obtain the first charging current, the first charging current is the current charging current of the battery; determine the second charging current, the second charging current is the charging current when the battery is fully charged; according to the first charging current and the second charging current Current, determine the average value of the charging current; determine the remaining charging time according to the average value of the charging current.
  • the processing module is also used to: determine the second charging current for this charging according to the first full charging voltage and the charging power of the charging device during this charging, wherein the first full charging voltage is a calculated value of the battery charging cut-off voltage.
  • the processing module is also used to: determine the second charging current for this charging according to the second full charging voltage and the charging power of the charging device during this charging, wherein the second full charging voltage is equal to the battery charging cut-off voltage during the previous charging. actual value.
  • the processing module may be used to execute the foregoing method 200 , method 221 , method 222 and/or method 500 .
  • the embodiment of the present application also provides a battery management system 122 , including a processor 1221 and a memory 1222 .
  • the memory 1222 is used to call a computer program to execute the method for determining the remaining charging time of the battery in the foregoing embodiments of the present application.
  • the embodiment of the present application also provides a readable storage medium for storing a computer program, and the computer program is used to execute the method for determining the remaining charging time of the battery in the foregoing embodiments of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

一种电池（121）充电剩余时间的确定方法，包括：获取第一充电电流（210），第一充电电流为电池（121）当前的充电电流；确定第二充电电流（220），第二充电电流为电池（121）在满充时的充电电流；根据第一充电电流和第二充电电流，确定充电电流平均值（230）；根据充电电流平均值，确定充电剩余时间（240）。如此能够减少计算过程中的误差，在充电初始阶段就能准确地得出电池（121）充电剩余时间。

Description

电池充电剩余时间的确定方法和系统
相关申请的交叉引用
本申请要求享有于2021年12月29日提交的名称为“电池充电剩余时间的确定方法和系统”的中国专利申请202111631835.3的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，特别是涉及一种电池充电剩余时间的确定方法和系统。
背景技术
随着新能源行业迅速发展，新能源汽车逐渐普及。在用车过程中，充电速度及充电时长则是车主最关注的问题，尤其充电时长不仅影响着车主的用车时间还会影响车主的用车安排。充电时长大多通过在充电时计算出充电剩余时间来提前告知车主，从而为车主之后的用车时间和安排提供依据。然而，目前电池充电剩余时间的算法误差较大，导致车主用车不便、用车体验较差。
发明内容
本申请提供了一种电池充电剩余时间的确定方法和系统，能够更加准确地确定出当前电池充电剩余时间。
第一方面，本申请提供一种电池充电剩余时间的确定方法，包括：获取第一充电电流，第一充电电流为电池当前的充电电流；确定第二充电电流，第二充电电流为电池在满充时的充电电流；根据第一充电电流和第二充电电流，确定充电电流平均值；根据充电电流平均值，确定充电剩余时间。
通过本申请实施例能够实现一种电池充电剩余时间的确定方法，根据电池当前的充电电流和电池满充时的充电电流，确定出充电电流的平均值，再根据该充电电流平均值，确定充电剩余时间。这样可以大大减少使用实时输出电流值而引入计算过程中的误差，在充电初始阶段就能较为准确地得出电池充电剩余时间，使计算出的电池充电剩余时间结果更加接近实际充电时长。该计算结果提供给车主、充电站等，便于车主合理安排用车，也可以使充电站充电规划更加科学可靠。
在一种可能的实施例中，确定第二充电电流包括：根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第一满充电压为电池充电截止电压的计算值。
上述实施例中，根据计算出的电池充电截止电压，结合充电装置恒定的充电功率，得出本次充电满充时的充电电流。采用这种方法预估本次充电满充时的充电电流计算精度更加高，便于后续准确地确定出电池充电剩余时间。
在一种可能的实施例中，确定第二充电电流包括：根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第二满充电压为上一次充电时电池充电截止电压的实际值。
上述实施例中，记录上一次充电时电池充电截止电压的实际值，在本次充电时，根据上一次充电时的电池充电截止电压，结合充电装置恒定的充电功率，得出本次充电满充时的充电电流。由于电池充电截止电压与电池健康状态(SOH)相关，会随着充电次数而变化，因此利用上一次充电时实际的电池充电截止电压能够更准确的计算出本次充电满充时的充电电流，从而使电池充电剩余时间的计算结果更加可靠。
第二方面，本申请还提供了一种用于确定电池充电剩余时间的系统，其特征在于，包括处理模块，所述处理模块用于：获取第一充电电流，第一充电电流为电池当前的充电电流；确定第二充电电流，第二充电电流为电池满充时的充电电流；根据第一充电电流和第二充电电流，确定充电电流平均值；根据充电电流平均值，确定充电剩余时间。
在一种可能的实施例中，处理模块还用于：根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第一满充电压为电池充电截止电压的计算值。
在一种可能的实施例中，处理模块还用于：根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第二满充电压为上一次充电时电池充电截止电压的实际值。
在一种可能的实施例中，系统还包括存储模块，该存储模块用于存储第二满充电压。
第三方面，本申请还提供了一种电池管理系统，包括处理器和存储器，存储器用于存储计算机程序，处理器用于调用计算机程序，执行上述第一方面中任意可能的实施例的方法。
第四方面，本申请还提供了一种可读存储介质，用于存储计算机程序，该计算机程序用于执行上述第一方面中任意可能的实施例的方法。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请一实施例公开的一种充电系统的结构示意图；
图2是本申请一实施例公开的一种电池剩余充电时间确定方法的流程示意图；
图3是本申请一实施例公开的一种第二充电电流确定方法的流程示意图；
图4是本申请一实施例公开的另一种第二充电电流确定方法的流程示意图；
图5是本申请一实施例公开的另一种电池剩余充电时间确定方法的流程示意图；
图6是本申请一实施例公开的一种电池管理模块的结构示意图。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
随着新能源行业迅速发展，新能源汽车逐渐普及，在用车过程中，充电速度及充电时长成为了车主最关注的问题。充电时长不仅影响着车主的用车时间，还会影响车主的用车安排。充电时长大多通过软件算法，在充电时计算出充电剩余时间提前告知车主，从而为车主之后的用车时间和安排提供依据。
目前市面上采用的慢充充电剩余时间的计算方法主要是：充电剩余时间＝剩余容量/充电桩实时输出的充电电流。然而，电动汽车在慢充时，充电桩输出功率为恒功率输出，且电动汽车电池 的电压在充电过程中会出现逐渐上升，因此充电桩实时输出的充电电流就会相应变化：在电池荷电状态(SOC)低的区间，电池总压较低，充电桩此时实际输出的电流就较大；而在电池荷电状态(SOC)高的区间，电池总压较高，充电桩实际输出的电流就较小。所以采用上述方法，在电动汽车充电过程中，尤其在充电初始阶段，使用充电桩实时输出的充电电流计算充电剩余时间会导致充电剩余时间的预估计算值比实际的充电时间小，从而可能出现充电剩余时间在较长一段时间内没有变化或充电剩余时间越来越大。预估的充电剩余时间误差较大，车主等待充电时间越来越长，则会影响车主的用车时间和用车安排，导致车主用车不便、用车体验较差。
因此，为解决上述问题，更加准确地在充电过程中确定出当前电池充电剩余时间，本申请提供了一种电池充电剩余时间的确定方法和系统。
图1示出了本申请实施例适用的一种充电系统的架构图。
如图1所示，该充电系统100可包括：充电装置110和电池系统120。可选地，该电池系统120可为电动汽车(包含纯电动汽车和可插电的混合动力电动汽车)中的电池系统或者其它应用场景下的电池系统。
可选地，电池系统120中可设置有至少一个电池包(battery pack)，该至少一个电池包的整体可统称为电池121。从电池的种类而言，该电池121可以是任意类型的电池，包括但不限于：锂离子电池、锂金属电池、锂硫电池等等。从电池的规模而言，本申请实施例中的电池121可以是电芯/电池单体(cell)，也可以是电池模组或电池包，电池模组或电池包均可由多个电池串并联形成，在本申请实施例中，电池121的具体类型和规模均不做具体限定。
此外，为了智能化管理及维护该电池121，防止电池出现过充电和过放电，延长电池的使用寿命，电池系统120中一般还设置有电池管理系统(battery management system，BMS)122，用于监控电池121的状态。可选地，该BMS 122可以与电池121集成设置于同一设备/装置中，或者，该BMS 122也可作为独立的设备/装置设置于电池121之外。
具体地，充电装置110是一种为电池系统120中的电池121补充电能和/或控制电池121放电的装置。
可选地，本申请实施例中的充电装置110可以为普通充电桩、超级充电桩、支持汽车对电网(vehicle to grid，V2G)模式的充电桩，或者可以对电池进行充电的充电设备等。本申请实施例对充电装置110的具体类型和具体应用场景不做限定。
可选地，如图1所示，充电装置110可通过电线130连接于电池121，且通过通信线140连接于BMS 122，其中，通信线140用于实现充电装置110以及BMS之间的信息交互。
作为示例，该通信线140包括但不限于是控制器局域网(control area network，CAN)通信总线或者菊花链(daisy chain)通信总线。
可选地，充电装置110除了可通过通信线140与BMS 122进行通信以外，还可以通过无线网络与BMS 122进行通信。本申请实施例对充放电装置与BMS 122的有线通信类型或无线通信类型均不做具体限定。
图2示出了本申请实施例的一种电池充电剩余时间的确定方法200，用于确定电池121在充电过程中的剩余充电时间。该方法200具体可以包括以下步骤中的部分或全部。
步骤210：获取第一充电电流。
其中，第一充电电流是电池当前的充电电流。获取电池当前时刻的充电电流具体可以通过获取充电桩当前的输出电流获取电池当前的充电电流，也可以通过采样获取电池当前的充电电流，本申请对获取充电电流的具体方法不做特殊限定。
步骤220：确定第二充电电流。
其中，第二充电电流是电池在满充时的充电电流。可选地，可以根据第一满充电压，即电池充电截止电压的计算值，以及本次充电时充电装置的充电功率，确定本次充电的第二充电电流； 也可以根据第二满充电压，即上一次充电时电池充电截止电压的实际值，以及本次充电时充电装置的充电功率，确定本次充电的第二充电电流。
步骤230：根据第一充电电流和第二充电电流，确定充电电流平均值。
具体地，将此时的第一充电电流和第二充电电流加和之后平均，即可得到充电电流的平均值。
步骤240：根据充电电流平均值，确定充电剩余时间。
具体地，根据充电剩余时间的计算公式：电池充电剩余时间＝电池剩余容量/充电电流的平均值，可以相应得到当前电池充电剩余时间。
上述实施例中，根据电池当前的充电电流和电池满充时的充电电流，可以确定出充电电流的平均值，再根据该充电电流平均值，确定充电剩余时间。这样可以大大减少使用实时输出电流值而引入计算过程中的误差，在充电初始阶段就能准确地得出电池充电剩余时间，使计算出的电池充电剩余时间结果更加接近实际充电时长。该计算结果提供给车主、充电站等，便于车主合理用车安排，也可以使充电站充电规划更加科学可靠。
可选地，如图3、图4所示，步骤220中确定第二充电电流可以通过方法221和方法222实现。方法221具体包括：
步骤2211：确定第一满充电压。
其中，第一满充电压为电池充电截止电压的计算值。具体可以根据电池充电截止电压的计算公式：电池充电截止电压＝电芯单体满充截止电压×电芯串联个数，确定出第一满充电压。
步骤2212：获取本次充电时充电装置的充电功率。
步骤2213：根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流。
其中，第二充电电流为电池满充时的充电电流。具体可以根据公式：电池满充时的充电电流＝充电装置的充电功率/第一满充电压，确定出本次充电的第二充电电流。
由于充电装置进行恒功率的充电，充电过程中输出的充电功率恒定，上述方法221通过计算电池充电截止电压，就可以根据该截止电压和本次充电时充电装置的充电功率确定出电池满充时的充电电流，即第二充电电流，再进行步骤230、步骤240从而确定出电池充电剩余时间。
方法222具体包括：
步骤2221：获取第二满充电压。
其中，第二满充电压为上一次充电时电池充电截止电压的实际值。具体地，在上一次充电时，记录上一次充电中电池充电截止电压的实际值，并将该电池充电截止电压存储在存储模块中，本次充电时，就可以从存储器中获取第二满充电压。其中，存储模块可以是非易失性存储器(Nonvolatile memory，NVM)，上一次充电过程中电池充电截止电压的实际值可以储存为NVM变量。
步骤2222：获取本次充电时充电装置的充电功率。
步骤2223：根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流。
其中，第二充电电流为电池满充时的充电电流。具体可以根据公式：电池满充时的充电电流＝充电装置的充电功率/第二满充电压，确定出本次充电的第二充电电流。
电池充电截止电压与电池健康状态(SOH)、单体电芯的电压值相关，因此随着充电次数增多，SOH逐渐降低、单体电芯的电压值发生变化，电池充电截止电压的实际值与计算值之间的误差则会越来越大。上述方法222记录并调用上一次充电中电池充电截止电压的实际值，并根据该截止电压和充电装置的充电功率确定出电池满充时的充电电流，再进行步骤230、步骤240从而确 定出电池充电剩余时间。通过利用上一次充电时电池充电截止电压的实际值，减小了电池充电截止电压带来的计算误差，更准确地计算出本次充电满充时的充电电流，从而使电池充电剩余时间的计算结果更加可靠。
此外，在电池使用周期中，执行方法200可以单一执行方法221或方法222；也可以根据电池状态的变化，基于电池老化程度选用方法221或方法222。
图5为基于上述方法的一种可能实现方式的示意性流程图，通过采用充电电流平均值计算电池充电剩余时间，减少了电流变化给计算电池充电剩余时间带来的误差，使电池充电剩余时间的计算准确性更高。方法500具体可以包括：
步骤510：充电开始。
步骤520：根据预设条件，选取计算方案。
其中，可以根据充电次数或电池老化程度等预设判断条件，根据该预设条件选取计算方案。基于电池的具体情况选用合适的计算方法，可以使计算结果更精确。
例如，当本次充电的充电次数小于设定阈值或充电电池老化程度较低时，选用方法221，此时进入步骤531；当本次充电的充电次数大于等于设定阈值或充电电池老化程度较高时，选用方法222，此时进入步骤532。
步骤531：获取第一充电电流。其中，第一充电电流是电池当前的充电电流。
步骤541：确定第一满充电压。其中，第一满充电压为电池充电截止电压的计算值。
步骤551：获取本次充电时充电装置的充电功率。
步骤561：确定本次充电的第二充电电流。其中，第二充电电流为电池满充时的充电电流。
上述步骤的具体执行方式同前述实施例，此处不再赘述。
步骤532：获取第一充电电流。其中，第一充电电流是电池当前的充电电流。
步骤542：获取第二满充电压。其中，第二满充电压为上一次充电时电池充电截止电压的实际值。
步骤552：获取本次充电时充电装置的充电功率。
步骤562：确定本次充电的第二充电电流。其中，第二充电电流为电池满充时的充电电流。
上述步骤的具体执行方式同前述实施例，此处不再赘述。
步骤570：确定充电电流平均值。
具体地，将此时的第一充电电流和第二充电电流加和之后平均，得到充电电流的平均值。
步骤580：确定充电剩余时间。
具体地，根据充电剩余时间的计算公式：电池充电剩余时间＝电池剩余容量/充电电流的平均值，可以相应得到当前电池充电剩余时间。
步骤590：判断充电是否完成。
若本次充电未完成，继续根据步骤520选取的方案确定充电剩余时间；若充电完成，则结束计算流程。
从上述可能实现的方法中可以看出，通过采用充电电流平均值计算电池充电剩余时间，减少了实时输出电流值变化而给计算电池充电剩余时间带来的误差，在充电初始阶段就能准确地得出电池充电剩余时间，使计算出的电池充电剩余时间结果更加接近实际充电时长。
存储模块用于存储第二满充电压。
处理模块用于：获取第一充电电流，第一充电电流为电池当前的充电电流；确定第二充电电流，第二充电电流为电池满充时的充电电流；根据第一充电电流和第二充电电流，确定充电电流平均值；根据充电电流平均值，确定充电剩余时间。
处理模块还用于：根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第一满充电压为电池充电截止电压的计算值。
处理模块还用于：根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，第二满充电压为上一次充电时电池充电截止电压的实际值。
具体地，处理模块可以用于执行前述方法200、方法221、方法222和/或方法500。
如图6，本申请实施例还提供了一种电池管理系统122，包括处理器1221和存储器1222。存储器1222用于调用计算机程序，执行前述本申请各实施例中的电池充电剩余时间的确定方法。
本申请实施例还提供了一种可读存储介质，用于存储计算机程序，该计算器程序用于执行前述本申请各实施例中的电池充电剩余时间的确定方法。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (9)

  1. 一种电池充电剩余时间的确定方法，其特征在于，包括：
    获取第一充电电流，所述第一充电电流为电池当前的充电电流；
    确定第二充电电流，所述第二充电电流为所述电池在满充时的充电电流；
    根据所述第一充电电流和所述第二充电电流，确定充电电流平均值；
    根据所述充电电流平均值，确定所述充电剩余时间。
  2. 根据权利要求1所述的方法，所述确定第二充电电流包括：
    根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，所述第一满充电压为电池充电截止电压的计算值。
  3. 根据权利要求1所述的方法，所述确定第二充电电流包括：
    根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，所述第二满充电压为上一次充电时电池充电截止电压的实际值。
  4. 一种用于确定电池充电剩余时间的系统，其特征在于，包括处理模块，所述处理模块用于：
    获取第一充电电流，所述第一充电电流为电池当前的充电电流；
    确定第二充电电流，所述第二充电电流为所述电池满充时的充电电流；
    根据所述第一充电电流和所述第二充电电流，确定充电电流平均值；
    根据所述充电电流平均值，确定所述充电剩余时间。
  5. 根据权利要求4所述的系统，所述处理模块还用于：
    根据第一满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，所述第一满充电压为所述电池充电截止电压的计算值。
  6. 根据权利要求4所述的系统，所述处理模块还用于：
    根据第二满充电压和本次充电时充电装置的充电功率，确定本次充电的第二充电电流，其中，所述第二满充电压为上一次充电时电池充电截止电压的实际值。
  7. 根据权利要求4至6中任一项所述的系统，所述系统还包括存储模块，所述存储模块用于存储所述第二满充电压。
  8. 一种电池管理系统，其特征在于，包括处理器和存储器，所述存储器用于存储计算机程序，所述处理器用于调用所述计算机程序，执行上述权利要求1至3中任一项所述的方法。
  9. 一种可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序用于执行上述权利要求1至3中任一项所述的方法。
PCT/CN2022/089069 2021-12-29 2022-04-25 电池充电剩余时间的确定方法和系统 WO2023123767A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020227027813A KR20230106123A (ko) 2021-12-29 2022-04-25 배터리 충전 잔여 시간의 결정 방법 및 시스템
EP22744636.6A EP4227695A4 (en) 2021-12-29 2022-04-25 METHOD AND SYSTEM FOR DETERMINING A REMAINING BATTERY CHARGING TIME
JP2022547892A JP2024503766A (ja) 2021-12-29 2022-04-25 電池充電残り時間の確定方法及びシステム
US18/058,008 US20230204672A1 (en) 2021-12-29 2022-11-22 Method and system for determining remaining charging time of battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111631835.3A CN115825758B (zh) 2021-12-29 2021-12-29 电池充电剩余时间的确定方法和系统
CN202111631835.3 2021-12-29

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/058,008 Continuation US20230204672A1 (en) 2021-12-29 2022-11-22 Method and system for determining remaining charging time of battery

Publications (1)

Publication Number Publication Date
WO2023123767A1 true WO2023123767A1 (zh) 2023-07-06

Family

ID=85173037

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/089069 WO2023123767A1 (zh) 2021-12-29 2022-04-25 电池充电剩余时间的确定方法和系统

Country Status (2)

Country Link
CN (1) CN115825758B (zh)
WO (1) WO2023123767A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117319126A (zh) * 2023-11-29 2023-12-29 宁德时代新能源科技股份有限公司 芯片功耗控制方法、装置、计算机设备和存储介质

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09322420A (ja) * 1996-05-27 1997-12-12 Sony Corp 充電時間演算方法およびバッテリパック
CN101436690A (zh) * 2008-12-10 2009-05-20 深圳华为通信技术有限公司 一种充电时间的确定方法、装置和终端设备
US20120101754A1 (en) * 2010-10-25 2012-04-26 Nokia Corporation Method of estimating remaining constant current/constant voltage charging time
CN108646190A (zh) * 2018-05-08 2018-10-12 宁德时代新能源科技股份有限公司 电池剩余充电时间估算方法、装置和设备
CN108896928A (zh) * 2018-07-20 2018-11-27 深圳市道通智能航空技术有限公司 电池剩余时间的估算方法、装置、电芯、电池及飞行器
CN111422092A (zh) * 2020-04-17 2020-07-17 肇庆小鹏汽车有限公司 一种充电剩余时间计算方法及装置、存储介质
CN112035777A (zh) * 2020-09-01 2020-12-04 蜂巢能源科技有限公司 电池充电剩余时间计算方法、装置及车辆

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002315204A (ja) * 2001-04-18 2002-10-25 Matsushita Electric Ind Co Ltd 充電管理装置
KR100834958B1 (ko) * 2006-12-29 2008-06-03 삼성전자주식회사 휴대용 단말기의 배터리 소모전류 표시방법
JP5797004B2 (ja) * 2011-05-11 2015-10-21 本田技研工業株式会社 電動車両のバッテリ残量推定装置
TWI492482B (zh) * 2014-02-27 2015-07-11 Hycon Technology Corp 用於準確量測電池容量的主僕式電池管理系統
CN106786862A (zh) * 2016-12-13 2017-05-31 建荣半导体（深圳）有限公司 一种移动电源的电池剩余容量显示系统及其显示方法
CN108303650A (zh) * 2017-12-07 2018-07-20 深圳依偎控股有限公司 一种基于充电电池剩余充电时间的测算方法及系统
CN111216592B (zh) * 2018-11-23 2021-08-24 宝沃汽车（中国）有限公司 动力电池充电剩余时间估算方法、装置及电动汽车
CN112098864B (zh) * 2020-09-25 2023-10-20 Oppo广东移动通信有限公司 漏电流检测方法、装置、电子设备和存储介质
CN112798966B (zh) * 2020-12-30 2022-09-16 蜂巢能源科技股份有限公司 电池充电剩余时间估算方法、装置、存储介质及电子设备
CN112858938B (zh) * 2021-02-20 2022-10-21 Oppo广东移动通信有限公司 电量计算方法、装置、存储介质及电子设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09322420A (ja) * 1996-05-27 1997-12-12 Sony Corp 充電時間演算方法およびバッテリパック
CN101436690A (zh) * 2008-12-10 2009-05-20 深圳华为通信技术有限公司 一种充电时间的确定方法、装置和终端设备
US20120101754A1 (en) * 2010-10-25 2012-04-26 Nokia Corporation Method of estimating remaining constant current/constant voltage charging time
CN108646190A (zh) * 2018-05-08 2018-10-12 宁德时代新能源科技股份有限公司 电池剩余充电时间估算方法、装置和设备
CN108896928A (zh) * 2018-07-20 2018-11-27 深圳市道通智能航空技术有限公司 电池剩余时间的估算方法、装置、电芯、电池及飞行器
CN111422092A (zh) * 2020-04-17 2020-07-17 肇庆小鹏汽车有限公司 一种充电剩余时间计算方法及装置、存储介质
CN112035777A (zh) * 2020-09-01 2020-12-04 蜂巢能源科技有限公司 电池充电剩余时间计算方法、装置及车辆

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117319126A (zh) * 2023-11-29 2023-12-29 宁德时代新能源科技股份有限公司 芯片功耗控制方法、装置、计算机设备和存储介质
CN117319126B (zh) * 2023-11-29 2024-04-02 宁德时代新能源科技股份有限公司 芯片功耗控制方法、装置、计算机设备和存储介质

Also Published As

Publication number Publication date
CN115825758B (zh) 2023-11-17
CN115825758A (zh) 2023-03-21

Similar Documents

Publication Publication Date Title
CN110869784B (zh) 用于估计soc-ocv曲线的方法和设备
US10811886B2 (en) Charge control apparatus capable of high speed cell balancing and energy saving and method thereof
JP6863560B2 (ja) バッテリー抵抗推定装置及び方法
JP2020515859A (ja) ノイズを反映したバッテリーの残存容量の算出装置及び方法
US20240178687A1 (en) Apparatus and method for controlling operation of secondary battery using relative deterioration degree of electrode
CN112816893B (zh) 一种基于电池组单体剩余充电电量快速估计电池组容量方法
WO2024103801A1 (zh) 一种电池包的管理方法、装置、储能系统和电池包
WO2023123767A1 (zh) 电池充电剩余时间的确定方法和系统
WO2023206266A1 (zh) 电池系统的充电控制方法和充电控制装置
WO2022141292A1 (zh) 电池模组的均衡方法、装置、电池模组和电源管理控制器
US20230204672A1 (en) Method and system for determining remaining charging time of battery
KR20130079751A (ko) 전지 ｓｏｃ 추정 방법 및 시스템
WO2022178672A1 (zh) 一种充电控制方法、装置和电源管理控制器
WO2023035163A1 (zh) 动力电池充电的方法和电池管理系统
WO2024026598A1 (zh) 锂离子电池充电控制方法、装置、电子设备及存储介质
WO2024007212A1 (zh) 用于电池换电的方法和装置
WO2023092413A1 (zh) 动力电池充电的方法和电池管理系统
WO2023035164A1 (zh) 动力电池充电的方法和电池管理系统
US20230324472A1 (en) Detection method and detection device for battery, battery management system, and storage medium
WO2023092414A1 (zh) 动力电池充电的方法和电池管理系统
WO2023245574A1 (zh) 充电控制方法、充电控制装置、电子设备及存储介质
WO2023245570A1 (zh) 用电装置及其电池的充电时间计算方法、装置及介质
US20230335822A1 (en) Method for charging power battery and battery management system
WO2024007213A1 (zh) 用于电池换电的方法和装置
WO2023004712A1 (zh) 充放电装置、电池充电的方法和充放电系统

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2022547892

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 2022744636

Country of ref document: EP

Effective date: 20220805