CN111162330A - Battery control device and method - Google Patents

Battery control device and method Download PDF

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Publication number
CN111162330A
CN111162330A CN201811225258.6A CN201811225258A CN111162330A CN 111162330 A CN111162330 A CN 111162330A CN 201811225258 A CN201811225258 A CN 201811225258A CN 111162330 A CN111162330 A CN 111162330A
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battery
correlation
secondary battery
charge
current
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蒋蓉
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Individual
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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
    • H01M10/44—Methods for charging or discharging
    • 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

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  • Engineering & Computer Science (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 invention discloses a battery control device and a method, comprising the following steps: a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and a correlation calculation unit that calculates a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.

Description

Battery control device and method
Technical Field
The invention relates to the technical field of batteries, in particular to a battery control device and method.
Background
In recent years, efforts are being made to effectively utilize energy by using secondary batteries such as lithium ion batteries for power supply systems of vehicles or power supply systems of smart homes. Increasing the charge/discharge amount of the secondary battery is generally effective to improve the energy efficiency of the entire system. However, it is known that increasing the charge/discharge amount causes deterioration in the characteristics of the secondary battery. In particular, the internal resistance of the secondary battery increases, and the input/output characteristics deteriorate.
Therefore, there is an inverse relationship between the instantaneous energy efficiency of the entire system and the characteristic deterioration of the secondary battery. Meanwhile, the use period of the power supply for the above-mentioned use is extended for a long time. Therefore, it is preferable to use the secondary battery in such a manner that the energy efficiency becomes maximum over the entire assumed use period. For this purpose, it is necessary to control the charge/discharge amount of the secondary battery in such a manner that the characteristic degradation of the secondary battery falls within a predetermined range.
It is generally known that, when the voltage of a secondary battery is excessively high or excessively low, the characteristic degradation of the secondary battery rapidly progresses. In fact, the voltage of the secondary battery is the difference between the positive electrode potential and the negative electrode potential of the secondary battery, and thus the speed of characteristic degradation is determined not by the battery voltage but by the positive electrode potential. The potential of the negative electrode. Therefore, it is effective as a means of suppressing deterioration to correctly detect the positive electrode potential and the negative electrode potential of the secondary battery and then select the optimum battery operation according to the detected potentials. For example, PTL1 discloses a method in which the state of deterioration of a positive electrode, a negative electrode, and an electrolyte solution is quantitatively evaluated in a non-destructive manner by using a charge/discharge curve of a secondary battery to determine an open circuit potential. Open circuit potential of the positive and negative electrodes.
Disclosure of Invention
The invention provides a battery control device, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
and a correlation calculation unit that calculates a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, the charging being performed within an allowable range based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
The battery control device further comprises: a state-of-charge calculation unit that calculates a battery state-of-charge, a positive electrode state-of-charge, and a negative electrode state-of-charge based on a capacitance decrease from an initial battery capacitance.
The battery control device further comprises: a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data indicating a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
The battery control apparatus described above, the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
The battery control device, the battery control device sets up in battery system, battery system includes: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
A battery control method, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
a correlation calculation step of calculating a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
The battery control method further comprises the following steps: a state-of-charge calculation step of calculating a battery state-of-charge, a positive electrode state-of-charge and a negative electrode state-of-charge based on a decrease in capacitance from an initial battery capacitance.
The battery control method further comprises the following steps: a battery resistance increase rate calculation step of calculating a battery resistance increase rate at which the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data representing a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
In the battery control method, the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
In the battery control method, the battery control apparatus is provided in a battery system, and the battery system includes: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The first embodiment is as follows:
the invention provides a battery control device, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
and a correlation calculation unit that calculates a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, the charging being performed within an allowable range based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
The battery control device further comprises: a state-of-charge calculation unit that calculates a battery state-of-charge, a positive electrode state-of-charge, and a negative electrode state-of-charge based on a capacitance decrease from an initial battery capacitance.
The battery control device further comprises: a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data indicating a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
The battery control apparatus described above, the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
The battery control device, the battery control device sets up in battery system, battery system includes: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
Example two:
a battery control method, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
a correlation calculation step of calculating a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
The battery control method further comprises the following steps: a state-of-charge calculation step of calculating a battery state-of-charge, a positive electrode state-of-charge and a negative electrode state-of-charge based on a decrease in capacitance from an initial battery capacitance.
The battery control method further comprises the following steps: a battery resistance increase rate calculation step of calculating a battery resistance increase rate at which the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data representing a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
In the battery control method, the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
In the battery control method, the battery control apparatus is provided in a battery system, and the battery system includes: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems or devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various stages may be added, omitted, and/or combined. Also, features described with respect to certain configurations may be combined in various other configurations. Different aspects and elements of the configuration may be combined in a similar manner. Furthermore, many of the elements that follow as technology develops are merely examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
Further, although each operation may describe the operation as a sequential process, many of the operations can be performed in parallel or concurrently. In addition, the order of the operations may be rearranged. There may be other steps in a process. Furthermore, examples of the methods may be implemented by hardware, software, firmware, middleware, code, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or code, the program code or code segments to perform the necessary tasks may be stored in a non-transitory computer-readable medium such as a storage medium and the described tasks are performed by a processor.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims (10)

1. A battery control apparatus, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
and a correlation calculation unit that calculates a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, the charging being performed within an allowable range based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
2. The battery control apparatus according to claim 1, further comprising: a state-of-charge calculation unit that calculates a battery state-of-charge, a positive electrode state-of-charge, and a negative electrode state-of-charge based on a capacitance decrease from an initial battery capacitance.
3. The battery control apparatus according to claim 2, further comprising: a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data indicating a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
4. The battery control apparatus according to claim 2, wherein the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature, and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature, and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
5. The battery control apparatus according to any one of claims 1 to 4, wherein the battery control apparatus is provided in a battery system including: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
6. A battery control method, comprising:
a storage unit that stores in advance first data indicating a rate of increase in resistance of a positive electrode of the secondary battery and second data indicating a rate of increase in resistance of a negative electrode of the secondary battery; and
a correlation calculation step of calculating a first correlation indicating a correlation between an upper limit current of the secondary battery, a battery state of charge and a temperature, and a second correlation charge and a temperature indicating a correlation between a lower limit current of the secondary battery, a battery state of charge and a temperature, based on a battery resistance increase rate of the secondary battery, the battery state of charge, a positive electrode state of charge, a negative electrode state of charge, wherein the current of the secondary battery is controlled based on the first data and the second data calculated by the correlation calculation unit.
7. The battery control method according to claim 6, further comprising: a state-of-charge calculation step of calculating a battery state-of-charge, a positive electrode state-of-charge and a negative electrode state-of-charge based on a decrease in capacitance from an initial battery capacitance.
8. The battery control method according to claim 7, characterized by further comprising: a battery resistance increase rate calculation step of calculating a battery resistance increase rate at which the capacitance of the secondary battery decreases, based on first data indicating a resistance increase rate of a positive electrode of the secondary battery and the second battery, data representing a resistance increase rate of a negative electrode of the secondary battery, and based on a battery charge state, a positive electrode charge state and a negative electrode charge state calculated by the states, a charge calculation unit,
wherein the correlation calculation unit calculates the first correlation and the second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
9. The battery control method according to claim 7, wherein the storage unit further stores a third correlation representing a correlation between a state of charge of a positive electrode of the secondary battery, temperature, and resistance, and a fourth correlation representing a correlation between a state of charge of a negative electrode of the secondary battery, temperature, and resistance;
the battery control device further includes a battery resistance increase rate calculation unit that calculates a battery resistance increase rate when the capacitance of the secondary battery decreases, the first data, the second data, the third correlation, and the fourth correlation, based on resistances other than the positive electrode and the negative electrode of the secondary battery; and
the correlation calculation unit calculates a first correlation and a second correlation based on the allowable range and the rate of increase in the battery resistance when the capacitance decreases.
10. The battery control method according to any one of claims 6 to 9, wherein the battery control device is provided in a battery system that includes: the secondary battery; a generator; a motor driven by a current of the secondary battery; and a battery cooling device driven by a current of the secondary battery, the battery control device for controlling the current of the secondary battery, the battery control device comprising:
a first determination unit that determines whether a requested current of the secondary battery is lower than or equal to the upper limit current, based on the first correlation; and
a second determination unit that determines whether a requested current of the secondary battery is higher than or equal to the lower limit current based on the second correlation, wherein:
when the first determination unit determines that the requested current is higher than the upper limit current, the battery control device causes the secondary battery to output the upper limit current and causes the generator to supply the equivalent of current to the motor to a difference between the requested current and the upper limit current; and
when the second determination unit determines that the requested current is lower than the lower limit current, the battery control device causes the secondary battery to output the requested current and decreases the current input from the secondary battery to the battery cooling device.
CN201811225258.6A 2018-10-20 2018-10-20 Battery control device and method Pending CN111162330A (en)

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Application Number Priority Date Filing Date Title
CN201811225258.6A CN111162330A (en) 2018-10-20 2018-10-20 Battery control device and method

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