CN112152278B - Battery control apparatus and electronic device including battery, and power controller - Google Patents

Battery control apparatus and electronic device including battery, and power controller Download PDF

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Publication number
CN112152278B
CN112152278B CN202010371276.6A CN202010371276A CN112152278B CN 112152278 B CN112152278 B CN 112152278B CN 202010371276 A CN202010371276 A CN 202010371276A CN 112152278 B CN112152278 B CN 112152278B
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China
Prior art keywords
current
battery
power
solid electrolyte
load
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CN202010371276.6A
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Chinese (zh)
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CN112152278A (en
Inventor
张正民
李相润
李汀苑
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Samsung Electro Mechanics Co Ltd
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Samsung Electro Mechanics Co Ltd
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Priority claimed from KR1020190100499A external-priority patent/KR102666299B1/en
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Priority to CN202410363375.8A priority Critical patent/CN118157280A/en
Publication of CN112152278A publication Critical patent/CN112152278A/en
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Publication of CN112152278B publication Critical patent/CN112152278B/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • 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
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/4214—Arrangements for moving electrodes or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M16/00—Structural combinations of different types of electrochemical generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00718—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to charge current gradient
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a battery control apparatus, an electronic device including a battery, and a power controller. The battery control apparatus includes: a first current sensor configured to sense a first current flowing from the first battery to the output unit; a first current limiter configured to limit an increase in the first current using a sensing result of the first current sensor when the first current exceeds a reference current; and a second current activator configured to pass a second current of a second battery to the output unit based on the limitation of the first current limiter.

Description

Battery control apparatus and electronic device including battery, and power controller
The present application claims the benefit of priority of korean patent application No. 10-2019-0078188 filed in the korean intellectual property office at 28 of 2019 and korean patent application No. 10-2019-0100499 filed in the korean intellectual property office at 16 of 2019, the disclosures of which are incorporated herein by reference in their entirety.
Technical Field
The present disclosure relates to a battery control apparatus and an electronic device including a battery.
Background
In recent years, with the popularization of electronic devices such as computers, mobile phone terminals, and the like, batteries (which are power sources) have been demanded to be further reduced in size and to have a relatively high capacity. Currently, lithium ion secondary batteries capable of having a relatively high energy density, having a relatively small size, and being relatively lightweight have been put into practical use, and the demand for portable power sources has increased. However, such lithium ion secondary batteries have not reached the goal of ensuring a sufficient continuous use time, depending on the type of electronic equipment used.
For example, an electronic device may require varying amounts of current or relatively high current to provide various functions, but by providing such varying or relatively high current, the life of the battery may be reduced.
Since the life of an electronic device such as a portable terminal is basically determined by the life of a battery, a reduction in the life of the battery may be fatal to the electronic device.
Disclosure of Invention
An aspect of the present disclosure is to provide a battery control apparatus and an electronic device including a battery.
According to an aspect of the present disclosure, a battery control apparatus includes: a first current sensor configured to sense a first current flowing from the first battery to the output unit; a first current limiter configured to limit an increase in the first current using a sensing result of the first current sensor when the first current exceeds a reference current; and a second current activator configured to pass a second current of a second battery to the output unit based on the limitation of the first current limiter.
According to another aspect of the present disclosure, an electronic device includes: a substrate providing an arrangement space for a load; a first battery that supplies first electric power to the load and includes a liquid electrolyte; a second battery mounted on the substrate and including a solid electrolyte; and a battery controller configured to cut off second power supplied from the second battery to the load when an input current of the load is less than or equal to a reference current, and activate supply of the second power to the load when the input current of the load exceeds the reference current.
According to another aspect of the present disclosure, a power controller includes: a sensor configured to sense a first power supplied from a first power source to a load; an output limiter configured to limit an increase in the first power supplied from the first power supply based on the first power supplied from the first power supply exceeding a reference threshold; and a switch configured to allow flow of second power supplied from a second power supply to the load based on the output limiter limiting an increase in the first power supplied from the first power supply.
According to another aspect of the present disclosure, a power controller for controlling a flow of power from a first power source to an output unit, the power controller comprising: a first current limiter, a second power supply, and a second current activator. The first current limiter is configured to be disposed in series with the first power supply between a ground terminal and the output unit, and configured to regulate power flowing from the first power supply to the output unit. The second power supply and the second current activator are disposed in series with each other between the ground terminal and the output unit, and the second current activator regulates the power flowing from the second power supply to the output unit under the control of the first current limiter.
Drawings
The above and other aspects, features and advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1A is a diagram illustrating a battery control apparatus according to an example embodiment of the present disclosure.
Fig. 1B is a diagram showing a structure in which the number of batteries is larger than that of the battery control apparatus shown in fig. 1A.
Fig. 1C is a diagram showing a structure in which a voltage regulator is added to the battery control apparatus shown in fig. 1A.
Fig. 1D is a diagram illustrating an electronic device including a battery according to an embodiment of the present disclosure.
Fig. 2A is a diagram illustrating a connection relationship between components of a battery control apparatus according to an example embodiment of the present disclosure.
Fig. 2B is a circuit diagram showing an equivalent circuit of the battery control apparatus according to the embodiment of the present disclosure.
Fig. 2C is a circuit diagram showing an equivalent circuit of the first current limiter shown in fig. 2B when the first current is less than or equal to the reference current.
Fig. 2D is a circuit diagram showing an equivalent circuit of the first current limiter shown in fig. 2B when the first current exceeds the reference current.
Fig. 2E is a circuit diagram illustrating a voltage-based operation structure of the first current limiter and the second current activator shown in fig. 2D.
Fig. 2F is a circuit diagram illustrating an active control structure of the battery control apparatus according to an embodiment of the present disclosure.
Fig. 2G is a circuit diagram illustrating a structure of a voltage regulator in which a battery control apparatus according to an example embodiment of the present disclosure is omitted.
Fig. 2H is a circuit diagram showing the battery control apparatus shown in fig. 1B.
Fig. 3 is a graph showing that a first current of a first battery and a second current of a second battery are changed according to a change in current flowing to a load of a battery control device according to an example embodiment of the present disclosure.
Fig. 4A is a side view showing a second battery (which is a control target of the battery control apparatus according to the embodiment of the present disclosure).
Fig. 4B is a perspective view illustrating a mounted state of the second battery shown in fig. 4A on a substrate.
Fig. 5 is a flowchart illustrating controlling a battery control apparatus and/or an electronic device according to an example embodiment of the present disclosure.
Detailed Description
The following detailed description of the present disclosure refers to the accompanying drawings that illustrate, by way of illustration, specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure. It is to be understood that the various embodiments of the disclosure are different, but not necessarily mutually exclusive. For example, certain shapes, structures, and characteristics described in one embodiment may be embodied in other embodiments without departing from the spirit and scope of the present disclosure with respect to one embodiment. Further, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the disclosure. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present disclosure is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. In all aspects, like reference numerals in the drawings indicate the same or similar functions or elements.
Hereinafter, example embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure.
Fig. 1A is a diagram illustrating a battery control apparatus according to an example embodiment of the present disclosure, and fig. 2A is a diagram illustrating a connection relationship between components of the battery control apparatus according to an example embodiment of the present disclosure.
Referring to fig. 1A and 2A, a battery control apparatus 100a according to an example embodiment of the present disclosure may control the magnitudes of first and second currents (I1 and I2) according to an output current (IO) flowing from an output unit 50 to a load 40. In this case, the output current (IO) may correspond to the sum of the first current (I1) of the first battery 10 and the second current (I2) of the second battery 20.
The battery control apparatus 100a may control the first and second currents (I1 and I2) through control of the first and second batteries 10 and 20.
The first battery 10 and the second battery 20 may have different characteristics (e.g., rated voltage, rated capacity, electrical stability, physical/chemical durability, size, etc.).
For example, the first battery 10 may relatively easily increase the magnitude of the first current (I1), and the first battery 10 may be configured to stably supply the first current (I1) to the load 40 due to its high capacity.
For example, the first cell 10 may be configured to include a liquid electrolyte, and the first cell 10 may have a relatively high energy density or be relatively inexpensive to manufacture on an energy unit basis as compared to the second cell 20. Accordingly, the first battery 10 can relatively easily supply the first current (I1) higher than the second current (I2) of the second battery 20 to the load 40.
For example, the second battery 20 may flexibly supply the second current (I2), which may be a relatively low current, to the load 40, and may be relatively easily miniaturized to have high stability/durability.
For example, the second battery 20 may be configured to include a solid electrolyte, may have characteristics relatively resistant to temperature change and external vibration with respect to the first battery 10, and the second battery 20 may more effectively handle a change in the second current (I2) supplied to the load 40 based on a steady state of the solid electrolyte.
The battery control apparatus 100a may control the first battery 10 and the second battery 20 having different characteristics in different principles and/or manners to effectively combine the first current and the second current having different characteristics to provide an output current (IO).
Referring to fig. 1A and 2A, the battery control apparatus 100a may include a first current sensor 110, a first current limiter 120, and a second current activator 130.
For example, the first current sensor 110, the first current limiter 120, and the second current activator 130 may be configured as a single Integrated Circuit (IC), may be configured in the form of a single IC with the power management circuit, or may be composed using a plurality of ICs.
The first current sensor 110 may be configured to sense a first current (I1) flowing from the first battery 10 to the output unit 50.
The first current limiter 120 may be configured to limit an increase of the first current (I1) by using a sensing result of the first current sensor 110 when the first current (I1) exceeds a reference current (e.g., 3A).
The second current activator 130 may be configured to deliver the second current (I2) of the second battery 20 to the output unit 50 based on the limiting operation of the first current limiter 120.
For example, when the magnitude of the output current (IO) is less than or equal to the reference current, the battery control apparatus 100a may basically control the first battery 10 and the second battery 20 such that only the first battery 10 supplies the first current (I1) to the load 40.
For example, when the magnitude of the output current (IO) is greater than the reference current, the battery control apparatus 100a may control the first battery 10 and the second battery 20 to allow the first battery 10 to supply the first current (I1) having the same magnitude as the reference current to the load 40 and allow the second battery 20 to supply the second current (I2) to the load 40, the second current (I2) corresponding to the remaining current of the output current (IO) other than the first current (I1).
Accordingly, since the battery control apparatus 100a may limit the magnitude of the first current (I1) to become too large, the battery control apparatus 100a may easily extend the life of the first battery 10, may more easily reduce the size of the first battery 10 according to the relaxation of the specification (e.g., maximum current, rated capacity) required for the battery, and may also improve the safety (e.g., possibility of explosion in a high temperature environment) of the first battery 10.
Further, the battery control apparatus 100a may provide a relatively high output current (IO) to the load 40 regardless of the maximum current and/or rated capacity of the battery.
Further, since a wide range of output current (IO) can be flexibly supplied to the load 40 without substantially causing a reduction in the life of the first battery 10, various circuit operations can be effectively performed or various energy demands can be effectively handled. For example, a relatively high output current (IO) may be smoothly provided to the load 40 to prevent distortion of the signal used (e.g., rise/fall speed limits of the pulse waveform, rise/fall saturation, etc.).
Fig. 1B is a diagram showing a structure in which the number of batteries is larger than that of the battery control apparatus shown in fig. 1A.
Referring to fig. 1B, the battery control apparatus according to the example embodiment may further control the third batteries 31, 32, and 33.
The second current activator 130 may be configured to transfer the third current of the third batteries 31, 32, and 33 electrically connected to the second battery 20 to the output unit 50 based on the limiting operation of the first current limiter 120.
When the third batteries 31, 32, and 33 are connected in parallel to the second battery 20, the magnitude of the output current supplied to the load can be larger even without substantially increasing the first current of the first battery 10.
When the third batteries 31, 32, and 33 are connected in series to the second battery 20, the total voltage of the second battery 20 and the third batteries 31, 32, and 33 may be higher than the second voltage of the second battery 20.
Therefore, when the first voltage of the first battery 10 is relatively high, the total voltage of the second battery 20 and the third batteries 31, 32, and 33 can be more easily matched to the first voltage.
Fig. 1C is a diagram showing a structure in which a voltage regulator is added to the battery control apparatus shown in fig. 1A.
Referring to fig. 1C, the battery control apparatus according to an example embodiment may further include a voltage regulator 140.
The voltage regulator 140 may be configured to regulate the second voltage such that the second voltage of the second battery 20 is closer to the first voltage of the first battery 10. For example, the voltage regulator 140 may be configured to regulate the voltage at the output of the second battery 20 to match the voltage at the output of the first battery 10.
For example, the voltage regulator 140 may be implemented as a boost DC-DC converter circuit or a charge pump circuit, and may support charging/discharging between the first battery 10 and the second battery 20.
Since the second voltage of the second battery 20 is closer to the first voltage of the first battery 10, the rate of change of the voltage of the load according to the change of the magnitude of the second current of the second battery 20 may be smaller. Accordingly, the load can stably receive a relatively high output current from the first battery 10 and the second battery 20, and the operation of a low voltage protection circuit or the like, which can be connected to the load, can be prevented.
Fig. 1D is a diagram illustrating an electronic device including a battery according to an embodiment of the present disclosure.
Referring to fig. 1D, an electronic device including a battery according to an embodiment of the present disclosure may include a substrate 60, a first battery 10, a second battery 20, and a battery controller 100b.
For example, types of electronic devices according to embodiments of the present disclosure may include, but are not limited to, smart phones, personal digital assistants, digital video cameras, digital cameras, network systems, computers, monitors, tablet computers, notebook computers, netbooks, televisions, video games, smartwatches, automobiles, and the like.
The substrate 60 may provide an arrangement space for the load 40.
For example, the substrate 60 may have a structure in which wiring layers and insulating layers are alternately stacked, such as a Printed Circuit Board (PCB), and may have first wirings electrically connecting the load 40 and the battery controller 100b and second wirings electrically connecting the second battery 20 and the battery controller 100b.
For example, the load 40 may be a Central Processing Unit (CPU) or a part of an application processor or a peripheral component, and may generate a digital signal and/or an analog signal based on an output current supplied from the first battery 10 and/or the second battery 20, or may process/output information based on the signal. For example, the signals and/or information may be transmitted to a communication modem, a high frequency circuit, or the like for communication, or may be transmitted to a display device or an image processing unit for display.
For example, the load 40 may regulate the output current of the battery controller 100b through a Power Management Integrated Circuit (PMIC), but is not limited thereto.
The first battery 10 may provide the first power to the load 40 and may include a liquid electrolyte.
The second battery 20 may be mounted on the substrate 60, and may include a solid electrolyte.
The battery controller 100b may correspond to a battery control apparatus according to an embodiment of the present disclosure. The battery controller 100b may be configured to cut off the second power supplied from the second battery 20 to the load 40 when the input current of the load 40 is less than or equal to the reference current. The battery controller 100b may be configured to activate the supply of the second power to the load 40 when the input current of the load 40 exceeds the reference current.
Accordingly, since a wide range of output current can be flexibly supplied to the load 40 without substantially causing a reduction in the life of the first battery 10, various circuit operations can be effectively performed or various energy demands can be effectively handled. For example, a relatively high output current may be smoothly provided to the load 40 to prevent distortion of the signal used (e.g., rise/fall speed limits of the pulse waveform, rise/fall saturation, etc.).
For example, even in the case where the service life of the first battery 10 is not substantially shortened, the electronic device including the battery according to the embodiment of the present disclosure may improve the basic performance of the load 40 to ensure the performance of applications (e.g., communication, display, large data management, etc.), and may improve the stability and durability of the first and second batteries 10 and 20 to provide the electronic device with improved stability and durability.
Referring to fig. 1A to 1D, a battery control apparatus 100a and/or a battery controller 100b according to an embodiment of the present disclosure may include a first positive electrode connection lb+, a first negative electrode connection LB-, a second positive electrode connection sb+ and a second negative electrode connection SB-.
The first positive electrode connection portion lb+ may be configured to connect the positive electrode of the first battery 10.
The first negative electrode connection portion LB-may be configured to connect the negative electrode of the first battery 10.
The second positive electrode connection portion sb+ may be configured to connect the positive electrode of the second battery 20.
The second negative electrode connection SB-may be configured to connect the negative electrode of the second battery 20.
For example, the first battery 10 and the second battery 20 may be electrically connected to the battery control apparatus 100a and/or the battery controller 100b through different electrical paths.
Accordingly, since the first battery 10 and the second battery 20 can be arranged at positions suitable for each other in the electronic device, the degree of freedom in arranging the first battery 10 and the second battery 20 in the electronic device can be improved.
For example, when the first battery 10 has a relatively large size, the first battery 10 may be disposed to be separated from the substrate 60.
For example, when the battery controller 100b and the second battery 20 are electrically connected to the substrate 60, the second positive electrode connection portion sb+ and the second negative electrode connection portion SB-may be connected to the positive electrode and the negative electrode of the second battery 20, respectively, through a plurality of different wirings of the substrate 60. For example, the positive electrode of the second battery 20 is electrically connected to the second positive electrode connecting portion sb+ through the positive wiring of the substrate 60, and the negative electrode of the second battery 20 is electrically connected to the second negative electrode connecting portion SB-through the negative wiring of the substrate 60.
Fig. 2B is a circuit diagram illustrating a battery control apparatus according to an embodiment of the present disclosure.
Referring to fig. 2B, the battery control apparatus according to the embodiment of the present disclosure may include a first current sensor 110a, a first current limiter 120a, and a second current activator 130a. The first battery 10a and the second battery 20a may be controlled according to the output current supplied to the load 40 a.
The first battery 10a can pass through the first capacitor C 1 And a second capacitor C 2 Zero-th resistor R 0 A first resistor R 1 And a second resistor R 2 Open circuit voltage (V) oc ) Is modeled by a combination of (a) and (b).
The second battery 20a can pass through the third capacitor C s And a third resistor R s Is modeled by a combination of (a) and (b).
The load 40a may pass through a maximum resistor R max Minimum resistor R min Switch t on And t off Is modeled and is connectable to the output unit 50.
The first current sensor 110a may include a current transformer that generates a sense current based on the first current. Primary side CT of current transformer 11 Can be electrically connected between the first battery 10a and the load 40a, and the secondary side CT of the current transformer 12 May be electrically connected to the first current limiter 120a.
The first current limiter 120a may include an impedance element R CT Impedance element R CT Providing and at the secondary side CT of a current transformer 12 A sense voltage corresponding to the sense current flowing in the circuit.
The first current limiter 120a may include a diode U l Diode U 1 The sensing voltage may be in a breakdown state when it reaches a reference voltage corresponding to the reference current. For example, diode U 1 May be a zener diode.
When diode U 1 Diode U when reverse bias is applied and the sense voltage does not reach the reference voltage 1 The current of (c) can be very low.
When a reverse bias is applied to the diode U1 and the sense voltage reaches the reference voltage, the diode U 1 Can be according to the current of diode U 1 And increases rapidly.
In addition, when diode U 1 Diode U when in breakdown state 1 The rate of change of the voltage according to the current change can be very small.
The first current limiter 120a may include a receiving diode U through a gate terminal 1 Voltage limiting transistor M of (2) 1 。
When diode U 1 Diode U when in breakdown state 1 The voltage of (c) may be almost unchanged. Thus, in the current limiting transistor M 1 The current flowing between the drain terminal and the source terminal of (c) may be almost constant.
Current limiting transistor M 1 A path between the drain terminal and the source terminal may be used as a path through which a current corresponding to the first current of the first battery 10a flows.
When diode U 1 In the breakdown state, in the current limiting transistor M 1 The current flowing between the drain terminal and the source terminal of (c) may be almost constant. Therefore, the increase in the first current of the first battery 10a can be restricted.
For example, the first current limiter 120a may be configured to use a diode U l To limit an increase in the first current of the first battery 10 a.
Diode U 1 Can be passed through the drive resistor R M To the second current activator 130a.
The second current activator 130a may include a receiving diode U through a base terminal 1 Current-activated transistor Q of the current of (a) 2 。
Current-activated transistor Q 2 The path between the emitter terminal and the collector terminal may be used as an electrical path between the second battery 20 and the output unit 50.
When diode U 1 When not in a breakdown state, the transistor Q is activated by current 2 The base current of the base terminal of (c) may be very small and the current activates transistor Q 2 The current between the emitter terminal and the collector terminal of (c) may also be relatively small. Thus, the transistor Q is current-activated 2 The electrical path between the second battery 20 and the output unit 50 may be blocked.
When diode U 1 In a breakdown state, the transistor Q is activated by a current 2 The base current of the base terminal of (c) may be relatively high and the current activates transistor Q 2 The current between the emitter terminal and the collector terminal of (c) may also be relatively high. Thus, the transistor Q is current-activated 2 The electrical path between the second battery 20 and the output unit 50 may be activated. For example, a current-activated transistor Q 2 Based on diodes U 1 To provide an electrical path between the second battery 20 and the output unit 50.
As a result, the second current activator 130a may transmit the second current of the second battery 20 to the output unit 50 based on the first current increase limiting operation of the first current limiter 120a.
Current limiting transistor M 1 May be a field effect transistor, a current activated transistor Q 2 May be a bipolar junction transistor BJT, but is not limited thereto. For example, a current-activated transistor Q 2 Other types of transistor compositions that operate with a base terminal based current may be utilized.
Fig. 2C is a circuit diagram showing an equivalent circuit of the first current limiter shown in fig. 2B when the first current is less than or equal to the reference current.
Referring to fig. 2C, when the output current (IO) or the first current (I1) is less than or equal to the reference current (IR), the Voltage (VB) of the diode D1 may not reach the reference Voltage (VR), and the current (IB) of the diode D1 may be close to 0A.
Thus, the second current (I2) may also be close to almost 0A, and the output current (IO) and the first current (I1) may be substantially the same.
Fig. 2D is a circuit diagram showing an equivalent circuit of the first current limiter shown in fig. 2B when the first current exceeds the reference current.
Referring to fig. 2D, when the output current (IO) or the first current (I1) exceeds the reference current (IR), the diode may serve as the constant voltage source VS according to a breakdown state.
Accordingly, a change in the Voltage (VB) of the diode can be restricted, and an increase in the first current (I1) can be restricted.
Further, since the current (IB) of the diode can be changed more freely, the current (IB) of the diode can be higher than 0A, and the second current (I2) can also be higher than 0A. Accordingly, the output current (IO) may have a magnitude corresponding to the sum of the first current (I1) which may be hardly changed and the second current (I2) which may flow.
Furthermore, operation of the constant voltage source VS according to the breakdown state of the diode may also support operation of the voltage regulator 140 (e.g., charge/discharge of charge).
Fig. 2E is a circuit diagram illustrating a voltage-based operation structure of the first current limiter and the second current activator shown in fig. 2D.
Referring to fig. 2E, the second current activator 130b may utilize a second field effect transistor M according to design 2 Realizing the method. Therefore, the type of the transistor included in the second current activator 130b is not particularly limited.
In this case, the second field effect transistor M 2 Can be connected to a diode gate resistor R B Ground resistor R C And diode gate resistor R B May be connected to ground.
Other currents in the constant voltage source VS based on the breakdown state of the diode may pass through the diode gate resistor R B And a grounding resistor R C Flows to ground and diode gate resistor R B And the voltage between the gate terminal may correspond to the current of the diode.
Fig. 2F is a circuit diagram illustrating an active control structure of the battery control apparatus according to an embodiment of the present disclosure.
Referring to fig. 2F, the battery control apparatus according to the embodiment of the present disclosure may further include a controller 150, the controller 150 based on the sensing result V of the first current sensor 110b D Generating a control signal V C . For example, the operating principle of the first current sensor 110b is not limited to the breakdown voltage.
The first current limiter 120b may be configured toAccording to the control signal V C It is selected whether or not to limit the increase of the first current of the first battery 10 a.
For example, the first current limiter 120b may include a switch T1, wherein the on/off state is based on the control signal V C To determine. In this case, the switch T1 may be configured as a transistor to respond to the control signal V input to the gate terminal C To determine whether to activate the electrical path between the drain terminal and the source terminal. For example, the switch T1 allows the second current supplied by the second battery 20 to flow to the load 40 based on the control signal Vc. In addition, the first current sensor 110b and the first current limiter 120b may be disposed in series with the first battery 10a between the ground (ground terminal) and the load 40, and the second current activator 130b and the second battery 20a may be disposed in series between the ground and the output unit 50.
Fig. 2G is a circuit diagram illustrating a structure of a voltage regulator in which a battery control apparatus according to an example embodiment of the present disclosure is omitted.
Referring to fig. 2G, the voltage regulator of the battery control apparatus according to example embodiments may be omitted.
For example, when the first voltage of the first battery 10a and the second voltage of the second battery 20a are similar to each other, the voltage regulator may be easily omitted.
For example, when the voltage stability required in the load 40a is relatively low, or when the load 40a further includes an auxiliary structure that mitigates voltage variation, the voltage regulator may be easily omitted.
Fig. 2H is a circuit diagram showing the battery control apparatus shown in fig. 1B.
Referring to fig. 2H, the battery control apparatus according to the embodiment of the present disclosure may selectively supply the current of the third batteries 31, 32, and 33 to the load 40a according to whether the second current activator 130a is activated.
For example, the number of batteries in the circuit configuration of the battery control apparatus according to the embodiment of the present disclosure is not particularly limited.
Fig. 3 is a graph showing that a first current of a first battery and a second current of a second battery are changed according to a change in current flowing to a load of a battery control device according to an example embodiment of the present disclosure.
Referring to fig. 3, when the total current (IO) supplied to the load increases to the maximum current (I) during the increase Time (TL) max ) When the first current (I1) of the first battery may be increased to the reference current (IR), and the second current (I2) of the second battery may be increased from the moment when the first current (I1) is increased to the reference current (IR).
Fig. 4A is a side view showing a second battery (which is a control target of the battery control apparatus according to the embodiment of the present disclosure).
Referring to fig. 4A, the second battery 20a may include a solid electrolyte 21, an internal positive electrode 22a, an internal negative electrode 22b, a positive electrode blocking portion 23a, a negative electrode blocking portion 23b, a positive electrode edge portion 24A, a negative electrode edge portion 24b, an external positive electrode 25a, and an external negative electrode 25b.
The internal positive electrode 22a may be provided on one of the upper surface and the lower surface of the solid electrolyte 21 (e.g., solid electrolyte layer). The internal negative electrode 22b may be provided on the other surface/opposite surface of the upper and lower surfaces of the solid electrolyte 21.
For example, the internal positive electrodes 22a and the internal negative electrodes 22b may be alternately stacked with the solid electrolyte 21 interposed between the internal positive electrodes 22a and the internal negative electrodes 22 b. For example, the internal negative electrode 22b and the internal positive electrode 22a may include a ceramic oxide-based material, but are not limited thereto.
For example, the solid electrolyte 21 may be used as a region in which lithium ions move between the internal positive electrode 22a and the internal negative electrode 22b, and may include a ceramic oxide-based material, but is not limited thereto.
For example, the solid electrolyte 21, the internal positive electrode 22a, and the internal negative electrode 22b may be calcined after being stacked in a slurry state or a paste state. The paste may be stacked by a doctor blade method or the like, and the paste may be printed in a predetermined form by a screen printing method, a gravure printing method or the like.
The external positive electrode 25a may be connected to the internal positive electrode 22a, and may be disposed on the first side surface of the solid electrolyte 21.
The external negative electrode 25b may be connected to the internal negative electrode 22b, and may be disposed on the second side surface of the solid electrolyte 21.
For example, the external positive electrode 25a and the external negative electrode 25b may include noble metals (e.g., pt, au, ag, etc.), but are not limited thereto, may be configured to include metals such as Cu, pd, pb, ni, sn, etc., and may include plating layers.
The outer surface of the external positive electrode 25a and the outer surface of the external negative electrode 25b may contact the solder paste, and may be electrically connected to a substrate such as a PCB through the solder paste. The solder paste may be hardened in a state in which the all-solid-state battery is mounted on the substrate.
Fig. 4B is a perspective view showing a mounted state of the second battery shown in fig. 4A on a substrate.
Referring to fig. 4B, the external positive electrode 25a and the external negative electrode 25B of the second battery 20a may be disposed on the upper surface of the first electrical connection structure 61a and the upper surface of the second electrical connection structure 61B, respectively. The first and second electrical connection structures 61a and 61b may be disposed on the substrate 60.
In this case, the external positive electrode 25a and the external negative electrode 25b may be fixed to the first electrical connection structure 61a and the second electrical connection structure 61b, respectively, by tin or tin-containing alloy-based solders.
Fig. 5 is a flowchart illustrating controlling a battery control apparatus and/or an electronic device according to an example embodiment of the present disclosure.
Referring to fig. 5, in a first operation (S110), a battery control apparatus and/or an electronic device according to an embodiment of the present disclosure may sense a first current or an output current of a first battery.
In the second operation (S115), the battery control apparatus and/or the electronic device may check whether the first current exceeds the reference current.
In a third operation (S120), the battery control apparatus and/or the electronic device may limit an increase in the first current when the first current exceeds the reference current.
In a fourth operation (S131), the battery control apparatus and/or the electronic device may activate the second current of the second battery when the first current exceeds the reference current.
In a fifth operation (S132), the battery control apparatus and/or the electronic device may cut off the second current of the second battery when the first current is less than or equal to the reference current.
The electronic apparatus according to the embodiment of the present disclosure may perform the control method shown in fig. 5 through the battery control device, but is not limited thereto. The electronic device may perform the control method through the PMIC or may perform the control method in software through the processor.
The battery control apparatus according to the embodiments of the present disclosure may easily extend the life of the battery, may more easily reduce the size of the battery according to relaxation of the specification (e.g., maximum current, rated capacity) required for the battery, and may also improve the safety (e.g., possibility of explosion in a high temperature environment) of the battery.
An electronic device including a battery according to example embodiments of the present disclosure may improve basic performance of a load to ensure performance of an application (e.g., communication, display, big data management, etc.) even without substantially shortening the life of the battery, and may improve stability and durability of the battery to allow the electronic device to have improved stability and durability.
Although exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the scope of the disclosure as defined by the appended claims.

Claims (27)

1. A battery control apparatus comprising:
a first current sensor configured to sense a first current flowing from the first battery to the output unit;
a first current limiter configured to limit an increase in the first current using a sensing result of the first current sensor when the first current exceeds a reference current; and
a second current activator configured to deliver a second current of a second battery to the output unit based on the limitation of the first current limiter,
wherein the first current limiter is configured to limit an increase of the first current using a breakdown voltage of a diode, the second current activator comprising a current activated transistor providing an electrical path between the second battery and the output unit based on a current according to the breakdown voltage of the diode.
2. The battery control apparatus according to claim 1, wherein the first battery includes a liquid electrolyte, and
the second battery includes a solid electrolyte.
3. The battery control device according to claim 2, wherein the second battery further comprises:
an internal positive electrode provided on one of an upper surface and a lower surface of the solid electrolyte;
an internal negative electrode disposed on the other of the upper surface and the lower surface of the solid electrolyte;
an external positive electrode electrically connected to the internal positive electrode and disposed on a first side surface of the solid electrolyte; and
an external negative electrode electrically connected to the internal negative electrode and disposed on a second side surface of the solid electrolyte.
4. The battery control device of claim 2, wherein the second current activator is further configured to pass a third current of a third battery electrically connected to the second battery to the output unit based on a limitation of the first current limiter.
5. The battery control apparatus according to claim 1, further comprising: a voltage regulator configured to regulate a level of a second voltage of the second battery such that the level of the second voltage is closer to a level of a first voltage of the first battery.
6. The battery control device of claim 1, wherein the diode is a zener diode.
7. The battery control device of claim 6, wherein the first current limiter comprises a current limiting transistor configured to provide a path through which a current corresponding to the first current flows, receive an input voltage corresponding to the breakdown voltage, and limit an increase in the first current.
8. The battery control device of claim 1, wherein the second current activator is further configured to shut off the supply of the second current in response to the first current being less than or equal to the reference current.
9. The battery control device according to claim 1, wherein the first current sensor includes a current transformer that generates a sense current based on the first current, and
the first current limiter comprises:
an impedance element providing a sensing voltage corresponding to the sensing current; and
the diode is in a breakdown state when the sensing voltage reaches a reference voltage corresponding to the reference current.
10. The battery control apparatus according to claim 1, further comprising: a controller configured to generate a control signal based on the sensing result of the first current sensor,
wherein the first current limiter is configured to select whether to limit an increase in the first current in dependence on the control signal.
11. An electronic device, comprising:
a substrate providing an arrangement space for a load;
a first battery that supplies first electric power to the load and includes a liquid electrolyte;
a second battery mounted on the substrate and including a solid electrolyte; and
the battery control device according to claim 1, configured to shut off second power supplied from the second battery to the load when an input current of the load is less than or equal to a reference current, and to activate supply of the second power to the load when the input current of the load exceeds the reference current.
12. The electronic device of claim 11, wherein the second battery further comprises:
an internal positive electrode provided on one of an upper surface and a lower surface of the solid electrolyte;
an internal negative electrode disposed on the other of the upper surface and the lower surface of the solid electrolyte;
an external positive electrode electrically connected to the internal positive electrode and disposed on a first side surface of the solid electrolyte; and
an external negative electrode electrically connected to the internal negative electrode and disposed on a second side surface of the solid electrolyte,
wherein the substrate comprises:
a first electrical connection structure having an upper surface on which the external positive electrode is disposed; and
a second electrical connection structure having an upper surface on which the external negative electrode is disposed.
13. The electronic device according to claim 11, wherein the battery control apparatus further comprises:
a first positive electrode connection to which a positive electrode of the first battery is electrically connected;
a first negative electrode connection portion to which a negative electrode of the first battery is electrically connected;
a second positive electrode connection to which a positive electrode of the second battery is electrically connected; and
and a second negative electrode connection part to which a negative electrode of the second battery is electrically connected.
14. The electronic device according to claim 11, wherein the battery control apparatus further comprises:
a second positive electrode connection portion to which a positive electrode of the second battery is electrically connected through a positive wiring of the substrate; and
and a second negative electrode connection part to which a negative electrode of the second battery is electrically connected through a negative wiring of the substrate.
15. The electronic device of claim 11, wherein the diode is a zener diode.
16. The electronic device according to claim 11, wherein the battery control apparatus further comprises: a controller configured to generate a control signal based on the sensing result of the first current sensor,
wherein the first current limiter is configured to select whether to limit an increase in the first current in dependence on the control signal.
17. A power controller, comprising:
a sensor configured to sense a first power supplied from a first power source to a load;
an output limiter configured to limit an increase in the first power supplied from the first power supply based on the first power supplied from the first power supply exceeding a reference threshold using a breakdown voltage of a diode; and
a switch configured to provide an electrical path between a second power source and the load with a current according to a breakdown voltage of the diode based on a limitation of an increase in the first power supplied from the first power source by the output limiter to allow a flow of the second power supplied from the second power source to the load.
18. The power controller of claim 17, wherein the first power source comprises a liquid electrolyte, and
the second power source includes a solid electrolyte.
19. The power controller of claim 17, wherein the second power source comprises:
a main body;
a plurality of first internal electrodes and a plurality of second internal electrodes alternately stacked to overlap each other and to be spaced apart from each other in the body; and
first and second external electrodes disposed on one or more outer surfaces of the body and connected to the plurality of first and second internal electrodes, respectively.
20. The power controller according to claim 19, wherein the first and second internal electrodes are alternately stacked with a solid electrolyte layer disposed between the first and second internal electrodes so as to be spaced apart from each other by the solid electrolyte layer.
21. The power controller of claim 17, further comprising:
a voltage regulator includes a boost DC-DC converter circuit or a charge pump circuit and is configured to regulate a voltage level at an output of the second power supply to match a voltage level at an output of the first power supply.
22. The power controller of claim 17, wherein the sensor and the output limiter are disposed in series with the first power source between a ground terminal and the load, and
the switch is disposed in series with the second power supply between the ground terminal and the load.
23. A power controller for controlling a flow of power from a first power source to an output unit, the power controller comprising:
a first current limiter configured to be disposed in series with the first power supply between a ground terminal and the output unit, and configured to regulate power flowing from the first power supply to the output unit;
a second power supply and a second current activator, which are arranged in series with each other between the ground terminal and the output unit,
wherein the second current activator regulates power flowing from the second power supply to the output unit under control of the first current limiter,
wherein the first current limiter is configured to limit an increase of the first current using a breakdown voltage of a diode, the second current activator comprising a current activated transistor providing an electrical path between the second power supply and the output unit based on a current according to the breakdown voltage of the diode.
24. The power controller of claim 23, wherein the second power source provides operating power to the first current limiter.
25. The power controller of claim 23, wherein the second power source is a solid electrolyte battery.
26. The power controller of claim 23, wherein the second power source comprises:
a main body;
a plurality of first internal electrodes and a plurality of second internal electrodes alternately stacked to overlap each other and to be spaced apart from each other in the body; and
first and second external electrodes disposed on one or more outer surfaces of the body and connected to the plurality of first and second internal electrodes, respectively.
27. The power controller of claim 26, wherein the first and second internal electrodes are alternately stacked with a solid electrolyte layer disposed between the first and second internal electrodes so as to be spaced apart from each other by the solid electrolyte layer.
CN202010371276.6A 2019-06-28 2020-05-06 Battery control apparatus and electronic device including battery, and power controller Active CN112152278B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056764A (en) * 1974-06-03 1977-11-01 Nissan Motor Company, Limited Power supply system having two different types of batteries and current-limiting circuit for lower output battery
CN101938162A (en) * 2009-06-30 2011-01-05 凹凸电子（武汉）有限公司 System for managing power and method for supplying power to load
CN109687559A (en) * 2019-02-26 2019-04-26 四川腾利恒欣科技有限公司 A kind of electricity of power battery-electricity mixed power supply system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056764A (en) * 1974-06-03 1977-11-01 Nissan Motor Company, Limited Power supply system having two different types of batteries and current-limiting circuit for lower output battery
CN101938162A (en) * 2009-06-30 2011-01-05 凹凸电子（武汉）有限公司 System for managing power and method for supplying power to load
CN109687559A (en) * 2019-02-26 2019-04-26 四川腾利恒欣科技有限公司 A kind of electricity of power battery-electricity mixed power supply system

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