CN115104231A - Charging and discharging system and charging and discharging device - Google Patents

Charging and discharging system and charging and discharging device Download PDF

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Publication number
CN115104231A
CN115104231A CN202180013890.8A CN202180013890A CN115104231A CN 115104231 A CN115104231 A CN 115104231A CN 202180013890 A CN202180013890 A CN 202180013890A CN 115104231 A CN115104231 A CN 115104231A
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China
Prior art keywords
battery pack
charge
discharge
deterioration
degree
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Pending
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CN202180013890.8A
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Chinese (zh)
Inventor
远矢正一
安藤圣师
丰永智彦
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of CN115104231A publication Critical patent/CN115104231A/en
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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
    • 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
    • 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
    • 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

Abstract

The battery pack (100) can be attached to and detached from the charge/discharge device (200), and the charge/discharge device (200) performs charging or discharging to a first level when the battery pack (100) is attached. The battery pack (100) determines the degree of deterioration of the battery pack (100), transmits the degree of deterioration to the information terminal device (300), and receives a discard instruction based on the degree of deterioration from the information terminal device (300). The charging/discharging device (200) performs discharging to a second level lower than the first level on the battery pack (100) that has received the discard instruction.

Description

Charging and discharging system and charging and discharging device
Technical Field
The present disclosure relates to a charging and discharging technology, and more particularly, to a charging and discharging system and a charging and discharging device for charging and discharging a storage battery.
Background
The battery pack to be collected is generally collected by a manufacturer or the like. In this case, it is required to estimate the location of the battery pack to be collected. Therefore, a charger to which the battery pack is attachable/detachable to/from the charging/discharging device has a communication function for communicating with the server device via the base station, and the charger transmits the identification information of the battery pack to the server device. The server device determines whether or not the battery pack is a collection target based on the identification information of the battery pack, and estimates the location of the battery pack based on the identification information of the base station relaying the identification information of the battery pack (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2019-191833
Disclosure of Invention
Problems to be solved by the invention
In the case where the battery pack includes a lithium ion secondary battery, various states of the lithium ion secondary battery are managed in the battery pack in order to safely use the battery pack. Such various conditions are also expected to be used for safely discarding the battery pack.
The present disclosure has been made in view of such circumstances, and an object thereof is to provide a technique for safely discarding a secondary battery pack using various states managed in the secondary battery pack.
Means for solving the problems
To solve the above problem, a charge/discharge system according to an aspect of the present disclosure includes: a battery pack; and a charging/discharging device to which the secondary battery pack is attachable/detachable, the charging/discharging device performing charging or discharging to a first level when the secondary battery pack is attached. The secondary battery pack determines a degree of deterioration of the secondary battery pack, transmits the degree of deterioration to the information terminal device, and receives a discarding instruction based on the degree of deterioration from the information terminal device, and the charging and discharging device performs discharging to a second level lower than the first level on the secondary battery pack that has received the discarding instruction.
Another embodiment of the present disclosure is also a charge/discharge system. The charge-discharge system includes: a battery pack; and a charging/discharging device to which the secondary battery pack is attachable/detachable, the charging/discharging device performing charging or discharging to a first level when the secondary battery pack is attached. The battery pack notifies a discarding advice made based on the determined degree of deterioration of the battery pack, receives a discarding instruction corresponding to the discarding advice, and the charge/discharge device performs discharge to a second level lower than the first level on the battery pack that received the discarding instruction.
In another aspect of the present disclosure, a charging and discharging device to which a battery pack is attachable and detachable includes: a charge/discharge unit that performs charging or discharging to a first level when the battery pack is mounted; and a reception unit that receives a disposal instruction from the battery pack when the battery pack determines a degree of deterioration of the battery pack, transmits the degree of deterioration to the information terminal device, and receives the disposal instruction based on the degree of deterioration from the information terminal device. When the reception unit receives the discard instruction, the charge/discharge unit discharges the battery pack to a second level lower than the first level.
Another aspect of the present disclosure is a charging and discharging device to which a battery pack is attachable and detachable, the charging and discharging device including: a charge/discharge unit that performs charging or discharging to a first level when the battery pack is mounted; and a reception unit that receives a discarding instruction from the battery pack when the battery pack notifies a discarding advice made based on the determined degree of degradation of the battery pack and receives the discarding instruction corresponding to the discarding advice. When the reception unit receives the discard instruction, the charge/discharge unit discharges the battery pack to a second level lower than the first level.
In addition, any combination of the above-described constituent elements, and a mode in which the expression of the present disclosure is converted between a method, an apparatus, a system, a recording medium, a computer program, and the like are also effective as a mode of the present disclosure.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present disclosure, the secondary battery pack can be safely discarded using various states managed in the secondary battery pack.
Drawings
Fig. 1 is a diagram showing a structure of a charge and discharge system according to example 1.
Fig. 2 is a diagram showing a structure of the charge and discharge system of fig. 1.
Fig. 3 (a) to (g) are diagrams showing an outline of initial settings of the charge and discharge system of fig. 1.
Fig. 4 is a diagram showing a data structure of the table stored in the storage unit of fig. 2.
Fig. 5 (a) - (i) are diagrams showing screens displayed on the display unit of fig. 2.
Fig. 6 (a) to (g) are diagrams showing an outline of disposal processing performed by the charge and discharge system of fig. 1.
Fig. 7 is a timing chart showing a procedure of disposal processing performed by the charge and discharge system of fig. 1.
Fig. 8 is a flowchart showing a process performed by the charge and discharge system of fig. 1.
Fig. 9 (a) to (b) are diagrams showing an outline of disposal processing performed by the charge and discharge system according to example 2.
Fig. 10 is a timing chart showing a procedure of disposal processing performed by the charge and discharge system according to example 2.
Detailed Description
(example 1)
Before specifically describing embodiments of the present disclosure, an outline of the embodiments is described. The present embodiment relates to a charge/discharge system capable of performing charge/discharge of a battery pack by connecting the battery pack to a charge/discharge device. In the case where the battery pack includes, for example, a lithium ion secondary battery, various states of the lithium ion secondary battery are acquired at the battery pack in order to safely use the battery pack. An example of the various states is the degree of deterioration of the battery. In the case where the battery is seriously deteriorated, the battery pack needs to be discarded. At this time, it is desirable to safely discard the battery pack.
In the charge/discharge system according to the present embodiment, an information terminal device such as a smartphone is connected to a battery pack by a short-range wireless communication system, and an application program operating in the information terminal device displays information on the battery pack and controls the battery pack. When the application program notifies the charge/discharge device of a discard instruction via the battery pack when discarding the battery pack, the charge/discharge device discharges the battery pack until the remaining capacity approaches zero. Here, the present embodiment will be described in the order of (1) configuration, (2) initial setting, (3) deterioration degree determination, (4) discarding process, and (5) delivery company.
(1) Structure of the device
Fig. 1 shows a structure of a charge/discharge system 1000. The charge/discharge system 1000 includes a battery pack 100, a charge/discharge device 200, an information terminal device 300, a network 400, and a server device 500. Battery pack 100 includes secondary batteries such as lithium-ion secondary batteries, and determines the degree of deterioration based on various states of the lithium-ion secondary batteries. Battery pack 100 is attachable to and detachable from charge/discharge device 200, and when battery pack 100 is attached to charge/discharge device 200, charge/discharge device 200 performs charging/discharging of battery pack 100 and performs communication between battery pack 100 and charge/discharge device 200. Battery pack 100 performs communication corresponding to a short-range wireless communication system. Examples of the short-range wireless communication system include Bluetooth (registered trademark) and BLE (Bluetooth Low Energy).
The information terminal device 300 is, for example, a smart phone, a tablet terminal, or a PC (Personal Computer). Information terminal device 300 is capable of performing communication in accordance with the same short-range wireless communication system as battery pack 100. The information terminal device 300 is connected to the network 400 and can communicate with the server device 500 via the network 400. For the network 400, for example, a 5G, 4G, or other wireless communication system is used. In addition, the internet can be combined with the network 400. Generally, the communicable range of the wireless communication system is larger than that of the short-range wireless communication system. Information terminal device 300 executes an application program (hereinafter referred to as "application program") for controlling battery pack 100. The processing by the application will be described later.
Server device 500 is used by a manufacturer or an operator who manufactures battery pack 100. The server device 500 is connected to the network 400, and executes processing for providing various information to an application program, for example.
Fig. 2 shows a structure of the charge/discharge system 1000. Fig. 2 shows the configurations of battery pack 100, charge/discharge device 200, and information terminal device 300 in fig. 1. Battery pack 100 includes battery 110, control unit 120, storage unit 130, first communication unit 140, notification unit 150, and operation unit 180, and control unit 120 includes determination unit 160 and second communication unit 170. The charging and discharging device 200 includes a charging and discharging circuit 210, a control unit 220, a communication unit 230, a power plug 250, a power supply unit 260, a cooling fan 270, and a discharger 280, and the control unit 220 includes a reception unit 240. The information terminal device 300 includes a first communication unit 310, a control unit 320, a storage unit 330, a display unit 340, an operation unit 350, and a second communication unit 360.
Battery 110 of battery pack 100 is a secondary battery such as a lithium ion secondary battery. The battery 110 is connected to the control unit 120 and controlled by the control unit 120. Control unit 120 controls the operation of battery pack 100 as a whole. An example of the operation is the determination of the degree of deterioration of battery 110 by determining unit 160. Storage unit 130 stores a table used by determining unit 160 to determine the degree of deterioration of battery 110. The first communication unit 140 communicates with the information terminal device 300 by performing communication corresponding to the short-range wireless communication system. The notification unit 150 is an interface for notifying a user of various information. The notification unit 150 includes, for example, a plurality of LEDs (Light Emitting diodes), and changes the lighting pattern of the plurality of LEDs in accordance with the content of the information. Second communication unit 170 is capable of performing serial communication such as RS-485, RS-422, and RS-232C, for example, and second communication unit 170 communicates with charge/discharge device 200 when battery pack 100 is connected to charge/discharge device 200. The operation unit 180 is an interface that can be operated by the user, and is, for example, a button.
The power plug 250 of the charge/discharge device 200 is connected to an external ac power supply so as to be attachable to and detachable from the external ac power supply. When the power plug 250 is connected to an ac power supply, the ac power supply can supply ac power to the charge and discharge device 200. When power plug 250 is connected to an ac power supply, when battery pack 100 is connected to a connection portion (not shown) of charge/discharge device 200, charge/discharge circuit 210 of charge/discharge device 200 converts ac power from power plug 250 into dc power to charge battery 110.
The power supply unit 260 is connected to an external electronic device so as to be attachable to and detachable from the external electronic device. When the electronic device is connected to the power supply unit 260, the charge and discharge device 200 can supply ac power to the electronic device. When the electronic device is connected to the power supply unit 260, if the battery pack 100 is connected to a connection unit (not shown) of the charge/discharge device 200, the charge/discharge circuit 210 of the charge/discharge device 200 converts the dc power from the battery 110 into the ac power and outputs the ac power from the power supply unit 260. At this time, the charge and discharge circuit 210 discharges the battery 110 to the first level. The first level is predetermined. The cooling fan 270 performs blowing to the charge and discharge circuit 210 by rotating. The temperature rise of the charge/discharge circuit 210 is suppressed by the air blowing. The cooling fan 270 is not limited to cooling, and may be a fan. The control unit 220 is connected to the charge/discharge circuit 210 and controls the operation of the entire charge/discharge device 200. Communication unit 230 is connectable to second communication unit 170, and communicates with battery pack 100 by the aforementioned serial communication.
First communication unit 310 of information terminal device 300 communicates with battery pack 100 by performing communication in accordance with the short-range wireless communication system. The control unit 320 is connected to the first communication unit 310, and controls the overall operation of the information terminal device 300. The control unit 320 executes processing provided by an application program by executing the application program stored in the storage unit 330, for example. The display unit 340 is a display for displaying information, and the operation unit 350 is an interface for receiving an instruction from a user. The display unit 340 and the operation unit 350 may be integrated as a touch panel. The second communication unit 360 performs communication corresponding to the wireless communication system, and thereby communicates with the server apparatus 500 via the network 400 of fig. 1.
(2) Initial setting
Fig. 3 (a) to (g) show an outline of initial settings in the charge/discharge system 1000. As shown in fig. 3 (a), the user of the information terminal device 300 operates the operation unit 350 to install the application program into the control unit 320 and the storage unit 330. For example, the second communication unit 360 receives an application program from a server (not shown), and the control unit 320 stores the application program in the storage unit 330 and sets the application program to be executable. In this case, information attached to the side surface of battery pack 100, for example, a QR (Quick Response) code, may be captured from information terminal device 300 and mounted.
When the application is installed, the user of the information terminal device 300 starts the application by operating the operation unit 350 while viewing the screen displayed on the display unit 340 as shown in fig. 3 (b). For example, the control unit 320 starts an application program stored in the storage unit 330. When the application program is started, control unit 320 transmits a search signal for searching for neighboring battery pack 100 via first communication unit 310. First communication unit 140 of battery pack 100, upon receiving the search signal, transmits identification information (hereinafter referred to as "battery ID") for identifying battery pack 100. First communication unit 310 of information terminal device 300 receives a battery ID from each battery pack of surrounding battery packs 100. The control unit 320 displays the list of the received battery IDs on the display unit 340 as shown in fig. 3 (c). The user selects the battery ID of battery pack 100 to be set by operating operation unit 350 while viewing the list of battery IDs.
Upon receiving the selected battery ID, the control unit 320 causes the display unit 340 to display an initial setting screen as shown in fig. 3 (e). The user operates the operation unit 350 while viewing the initial setting screen to input information of the initial setting. The information of the initial setting is, for example, (i) user information: name/address/phone number/email address, (ii) use purpose selection: power outage countermeasures/mobile power sources/refuges/others, (iii) use load selection: smart phone charging/PC/refrigerator/TV/others, (iv) start year, month, day of use: YYYY year MM month DD day, (v) written commitments to abandonment. When the input of the information of the initial setting is ended, the user ends the initial setting by clicking the "off" button. The click is received by the operation unit 350. The control unit 320 stores the information of the initial setting in the storage unit 330. When the user clicks the set battery ID displayed on the display unit 340 as shown in fig. 3 (f), the control unit 320 causes the display unit 340 to display a basic screen as shown in fig. 3 (g). Returning to fig. 2. Control unit 320 causes the basic screen to be displayed and requests battery pack 100 to provide information via first communication unit 310.
(3) Deterioration degree determination
Determination unit 160 of control unit 120 measures various states of battery 110, that is, battery pack 100. The various states include, for example, a remaining battery level, an SOH (State Of Health), an average temperature Of the battery, an internal resistance value Of the battery, an elapsed period after manufacturing Of battery pack 100, a total charge amount, a total discharge amount, and the like. Here, the remaining battery capacity is the remaining capacity of the battery 110. SOH represents a ratio of the current full charge capacity of the battery 110 to the initial full charge capacity, and corresponds to the learning capacity, for example. The elapsed period after battery pack 100 is manufactured is measured based on the difference between the current date obtained by the clock function provided in determination unit 160 and the date of manufacture of battery pack 100 stored in storage unit 130. Since these measurements can be performed by a known technique, the description thereof is omitted here.
Determination unit 160 determines the degree of deterioration of battery pack 100 based on the various measured states while referring to the table stored in storage unit 130. The deterioration degree is a value indicating the degree of deterioration of battery pack 100 from the initial state, and is expressed in 5 stages, for example. Fig. 4 shows a data structure of the table stored in the storage unit 130. Here, the degree of deterioration becomes higher in the order of degree of deterioration a, degree of deterioration B, degree of deterioration C, degree of deterioration D, and degree of deterioration E. The degree of deterioration a is a state where SOH is 90% or more, the degree of deterioration B is a state where SOH is less than 89% and 80% or more, the degree of deterioration C is a state where SOH is less than 79% and 70% or more, the degree of deterioration D is a state where SOH is less than 69% and 60% or more, and the degree of deterioration E is a state where SOH is less than 59%. That is, the deterioration degree a is the lowest deterioration degree, and indicates the state closest to the initial state. On the other hand, the deterioration degree E is the highest deterioration degree, and indicates the most serious deterioration state. It can be said that the degree of deterioration a indicates a state close to a new product, the degree of deterioration B indicates a slightly deteriorated state, the degree of deterioration C indicates a severely deteriorated state, the degree of deterioration D indicates a state before the lifetime, and the degree of deterioration E indicates a state reaching the lifetime. Here, the notification of the degree of deterioration D or E corresponds to a notification of recommendation to discard.
Here, the number of discharges means that the case of 10wh or more discharges is regarded as 1. The number of times of charging is 1 time when 50wh or more is charged. The average number of charge and discharge cycles means the number of cycles averaged over the month as the average number of cycles. Awh > Dwh, Bwh > Ewh, and C hours > F hours are set as conditions under which the transition is easier (the degree of degradation becomes high) when the usage frequency is high. Returning to fig. 2.
When the information terminal device 300 requests the first communication unit 140 to provide information, the control unit 120 transmits the measurement result and the determination result in the determination unit 160 from the first communication unit 140 to the information terminal device 300. When receiving the measurement result and determination result from battery pack 100, first communication unit 310 of information terminal device 300 outputs them to control unit 320. Control unit 320 displays a basic screen on display unit 340, which reflects the measurement result and determination result from battery pack 100. Fig. 5 (a) - (i) show screens displayed on the display unit 340. In particular, (a) to (e) of fig. 5 show basic screens having different degrees of deterioration from each other. The remaining battery level is represented by an indicator and a numerical value (0 to 100%). For example, the indicator is red when the remaining battery level is 0 to 10%, yellow when the remaining battery level is 11 to 20%, and green when the remaining battery level is 21 to 100%. In addition, the degree of deterioration is graphically and hierarchically represented as a battery state.
When the user clicks the "information" buttons shown in fig. 5 (a) to (e), the control unit 320 displays the screen of fig. 5 (f) on the display unit 340. As shown, a "Q & A" button, an "old-new" button, and a "new product information" button are displayed. When the user clicks the "Q & a" button in (f) of fig. 5, the control unit 320 causes the display unit 340 to display the Q & a screen in (g) of fig. 5. Q & a, a guide for use, and a contact address are shown in the Q & a screen. When the user clicks the "old-new" button in fig. 5 (f), the control unit 320 causes the display unit 340 to display the old-new screen in fig. 5 (h). The old-to-new screen shows the notes and the contact details when the screen is changed from old to new. When the user clicks the "new product information" button in fig. 5 (f), the control unit 320 causes the display unit 340 to display the new product information screen in fig. 5 (i). New product information is shown in the new product information. Returning to fig. 2.
Here, when battery pack 100 is mounted on charge/discharge device 200 to charge battery pack 100, the following process may be performed to determine the degree of deterioration. When the voltage of the battery 110 is equal to or less than the threshold value larger than the reference value of the voltage for determining SOH as a deterioration state, the charge/discharge circuit 210 is discharged until the voltage of the battery 110 reaches the reference value. Then, the determination unit 160 determines SOH. Further, the charge and discharge circuit 210 performs charging after SOH is determined.
(4) Disposal of waste
The disposal treatment is performed when the degree of deterioration is D or E. Fig. 6 (a) to (g) show an outline of disposal processing by the charge/discharge system 1000. Fig. 6 (a) shows a basic screen displayed on the information terminal device 300 when the degradation degree is E. When the displayed degradation degree is D or E, the user clicks the "discard processing" button. When the click is completed, control unit 320 transmits a notification of the mode change from first communication unit 310 to battery pack 100. First communication unit 140 of battery pack 100 receives a notification of a mode change from information terminal device 300. The control unit 120 executes the discard mode when receiving the notification of the mode change. The control unit 120 causes the notification unit 150 to display a notification for notifying the discarding mode. For example, the notification unit 150 performs stream display in which the plurality of LEDs are lit so that only 1 LED is lit in order from left to right as shown in fig. 6 (b).
As shown in fig. 6 (c), the user attaches battery pack 100 in the disposal mode to charge/discharge device 200. Control unit 120 detects a change in voltage due to mounting, thereby detecting connection between battery pack 100 and charge/discharge device 200. Control unit 120 transmits information indicating the connection between battery pack 100 and charge/discharge device 200 to information terminal device 300 via first communication unit 140. First communication unit 310 of information terminal device 300 receives information indicating connection between battery pack 100 and charge/discharge device 200. Accordingly, the control unit 320 displays the discard processing screen shown in fig. 6 (d) on the display unit 340. The user clicks the "discard discharge start" button. Control unit 320 transmits an instruction to start waste discharge to battery pack 100 via first communication unit 310. The instruction to start the discarding discharge corresponds to a discarding instruction.
First communication unit 140 of battery pack 100 receives an instruction to start discharge from information terminal device 300. The control unit 120 causes the notification unit 150 to display a notification for notifying the start of the waste discharge. For example, the notification unit 150 blinks all of the plurality of LEDs as shown in fig. 6 (e). Second communication unit 170 transmits an instruction to start waste discharge to charge/discharge device 200. The communication unit 230 of the charge/discharge device 200 receives the instruction to start the waste discharge. Accordingly, the reception unit 240 receives an instruction to start the waste discharge. That is, when battery pack 100 determines the degree of deterioration, transmits the degree of deterioration to information terminal device 300, and receives an instruction to start discharge from information terminal device 300 based on the degree of deterioration, receiving unit 240 receives the instruction to start discharge from battery pack 100.
When receiving the instruction to start discarding discharge in receiving unit 240, charge/discharge circuit 210 performs discharge to battery pack 100 to a second level lower than the first level using discharger 280 that reduces the capacity of battery 110. The discharger 280 is, for example, a resistor. The second rank is defined as a value equal to or larger than the remaining battery level at which first communication unit 140 of battery pack 100 can transmit the end of discharge to information terminal device 300 or control unit 120, for example. At this time, controller 220 uses cooling fan 270 for cooling charge/discharge circuit 210 at normal times as cooling discharger 280.
The charge/discharge circuit 210 terminates the discharge when the remaining battery level of the battery 110 reaches the second level. When detecting the end of discharge, control unit 120 of battery pack 100 causes notification unit 150 to display a notification for notifying the end of discharge. For example, the notification unit 150 turns off all of the plurality of LEDs as shown in fig. 6 (f). The control unit 120 transmits a notification of the end of discharge to the information terminal device 300 via the first communication unit 140. The notification of the end of discharge corresponds to the notification of the completion of preparation for disposal. Here, when battery pack 100 enters the capacity region lower than the first rank, control unit 120 may cause notification unit 150 to display a notification for notifying the end of discharge or transmit the notification of the end of discharge to information terminal device 300 via first communication unit 140. After these processes, the charge and discharge circuit 210 continues the discharge to the second level.
First communication unit 310 of information terminal device 300 receives a notification of the end of discharge from battery pack 100. Control unit 320 causes display unit 340 to display a disposal instruction for battery pack 100 as shown in fig. 6 (g). Further, the control unit 320 transmits a notification of the end of the discharge to the server device 500 via the second communication unit 360. The notification of the end of discharge includes the battery ID. Upon receiving the notification of the end of discharge, server device 500 registers battery pack 100 that can be discarded based on the battery ID.
(5) Delivery business person
The user puts the battery pack 100 into a carton after attaching adhesive tape to the terminals of the battery pack 100. The user hands the carton to a recycler. The discarding manufacturer can confirm whether or not the battery pack 100 has been discarded by pressing long on operation unit 180 of battery pack 100. When the disposal process is completed, the notification unit 150 blinks the LEDs at both ends for 5 seconds, for example. In addition, the discarding manufacturer can check whether or not battery pack 100 has been discarded by accessing server device 500.
The main body of the apparatus, system, or method in the present disclosure is provided with a computer. The computer executes the program to realize the functions of the main body of the apparatus, system, or method in the present disclosure. The computer includes a processor operating according to a program as a main hardware configuration. The processor is not limited in its kind as long as it can realize a function by executing a program. A processor is constituted by 1 or more electronic circuits including a semiconductor Integrated Circuit (IC) or an LSI (Large Scale Integration). The electronic circuits may be integrated on 1 chip or may be disposed on a plurality of chips. The plurality of chips may be integrated in 1 device, or may be provided in a plurality of devices. The program is recorded on a non-transitory recording medium such as a ROM (Read Only Memory), an optical disk, or a hard disk drive that can be Read by a computer. The program may be stored in advance in a recording medium, or may be supplied to the recording medium via a wide area communication network including the internet.
The operation of the charge/discharge system 1000 having the above structure will be described. Fig. 7 is a timing chart showing a procedure of disposal processing by the charge/discharge system 1000. Charge/discharge device 200 is connected to battery pack 100 (S10). Battery pack 100 determines the degree of deterioration (S12). Battery pack 100 transmits the degree of degradation to information terminal device 300 (S14). The information terminal device 300 notifies the discarding advice (S16) and accepts the instruction (S18). Information terminal device 300 transmits a discard instruction to battery pack 100(S20), and battery pack 100 transmits a discard instruction to charge/discharge device 200 (S22). The charge and discharge device 200 performs the discharge to the second level (S24). Charge/discharge device 200 transmits the end of discharge to battery pack 100(S26), and battery pack 100 transmits the end of discharge to information terminal device 300 (S28). The information terminal device 300 notifies the end (S30), and transmits the end of discharge to the server device 500 (S32).
Fig. 8 is a flowchart showing a process performed by the charge/discharge system 1000. The charge/discharge circuit 210 of the charge/discharge device 200 performs normal charge/discharge (S100). The determination unit 160 determines the degree of degradation (S102). If the degradation degree is not D or E (no in S104), the process returns to step 100. If the degradation degree is D or E (yes in S104), the information terminal device 300 notifies that the degradation degree is D or E (S106). If the discarding process is not committed (no in S108), the process returns to step 100. When the acceptance/rejection process is performed (yes in S108), the charge/discharge circuit 210 of the charge/discharge device 200 starts discharging (S110). When the remaining amount of battery 110 is not less than 0% of the remaining amount of the normal use range (no in S112), it stands by. When the remaining amount of battery 110 is less than 0% of the remaining amount of the normal usage range (yes in S112), the end of the disposal process is registered from battery pack 100 to server device 500 via information terminal device 300 (S114). If the margin is not zero (no in S116), the system stands by. If the margin is zero (yes in S116), the process is ended.
According to the present embodiment, since discharge to a second level lower than the first level is performed at battery pack 100 upon receiving a discard instruction made based on the degree of degradation from information terminal device 300, battery pack 100 can be safely discarded using various states managed in battery pack 100. Further, when the discharge to the second level is completed, the notice of the preparation completion of discarding is transmitted to the information terminal device 300, so that the user can be notified of the preparation completion of discarding. Since the charge and discharge circuit 210 is cooled by the cooling fan 270 at the time of discharge to the first level and the discharger 280 is cooled by the cooling fan 270 at the time of discharge to the second level, cooling can be performed efficiently.
In addition, since the deterioration state is determined after discharging until the voltage reaches the reference value when the voltage is equal to or less than the threshold value larger than the reference value of the voltage for determining the deterioration state, and charging is performed after the deterioration state is determined, the deterioration information can be determined. Further, when the voltage is equal to or lower than the threshold value larger than the reference value of the voltage for determining the state of degradation, the state of degradation is determined after the voltage reaches the reference value, and the charging is performed after the state of degradation is determined, so that it is possible to prevent the SOH from being always unable to be calculated by repeating the shallow discharging and the charging. Further, since the discharge is set to the second level, a notification of the end of the discharge can be transmitted. Further, since the notification of the end of discharge is transmitted, it is possible to confirm whether or not the battery pack 100 has been subjected to the disposal process by the disposal manufacturer.
An outline of one embodiment of the present disclosure is as follows. A charge/discharge system (1000) according to an aspect of the present disclosure includes: a battery pack (100); and a charging/discharging device (200), wherein the battery pack (100) is detachably attached to the charging/discharging device (200), and the charging/discharging device (200) performs charging or discharging to a first level when the battery pack (100) is attached. The battery pack (100) determines the degree of deterioration of the battery pack (100), transmits the degree of deterioration to the information terminal device (300), receives a discard instruction based on the degree of deterioration from the information terminal device (300), and the charge/discharge device (200) performs discharge to a second level lower than the first level on the battery pack (100) that has received the discard instruction.
When the battery pack (100) enters a capacity region lower than the first rank, a notification of completion of preparation for discarding may be transmitted to the information terminal device (300).
When the discharge of the battery pack (100) reaches the end of the discharge of the second rank, a notice of the completion of the preparation for discarding may be transmitted to the information terminal device (300).
The battery pack (100) may store a threshold value larger than a reference value of voltage for determining the state of degradation of the battery pack (100), and when the voltage is equal to or less than the threshold value, the battery pack may be discharged until the voltage reaches the reference value, determine the state of degradation, and perform charging after the state of degradation is determined.
Still another embodiment of the present disclosure is a charge and discharge device (200). The battery pack (100) is attachable to and detachable from the device, and the charge/discharge device (200) includes: a charging/discharging unit (210) that, when the battery pack (100) is mounted, performs charging or discharging to a first level by the charging/discharging unit (210); and a reception unit (240) that, when the battery pack (100) determines the degree of deterioration of the battery pack (100), transmits the degree of deterioration to the information terminal device (300), and receives a discard instruction based on the degree of deterioration from the information terminal device (300), receives the discard instruction from the battery pack (100) by the reception unit (240). When a discarding instruction is accepted by an acceptance unit (240), a charge/discharge unit (210) discharges the battery pack (100) to a second level lower than the first level.
Still another embodiment of the present disclosure is also a charge/discharge device (200). The device is provided with: a power plug (250) that is connected to an external AC power supply in a manner that enables attachment/detachment to/from the external AC power supply; a power supply unit (260) that is connected to an external electronic device in a manner that enables mounting and dismounting of the power supply unit to the external electronic device; a connecting part that connects a battery pack (100) that can be electrically connected to another device in a state detached from the other device; a charging/discharging circuit (210) that converts direct-current power output from the battery pack (100) connected to the connection unit into alternating-current power, outputs the alternating-current power to the power supply unit, and charges the battery pack (100) connected to the connection unit; a cooling fan (270) that suppresses a temperature rise of the charge/discharge circuit (210); a discharger (280) for reducing the capacity of the battery pack (100); and a control unit (220) that, when the capacity of the battery pack (100) is reduced, performs cooling of heat generated from the discharger (280) by means of a cooling fan (270) for cooling the charge/discharge circuit (210).
(example 2)
Next, example 2 will be described. Example 2 relates to a charge/discharge system capable of performing charge/discharge of a battery pack by connecting the battery pack to a charge/discharge device, as in example 1. Unlike embodiment 1, embodiment 2 does not include the information terminal device 300, the network 400, and the server device 500. This is explained here. Here, the following description will be made in order of (1) configuration, (2) initial setting, (3) deterioration degree determination, and (4) disposal process, focusing on differences from the above. Since the delivery company (5) is the same as in example 1, the description thereof is omitted here.
(1) Structure of the product
The charge/discharge system 1000 according to embodiment 2 is of the same type as that of fig. 1 and 2, but includes the battery pack 100 and the charge/discharge device 200, except for the information terminal device 300, the network 400, and the server device 500, as described above.
(2) Initial setting
When battery pack 100 is first attached to charge/discharge device 200, charge/discharge circuit 210 of charge/discharge device 200 charges battery 110 of battery pack 100. When control unit 120 detects the first full charge of battery 110, control unit 120 completes the initial setting.
(3) Deterioration degree determination
The deterioration degree was determined in the same manner as in example 1. When the user presses operation unit 180 of battery pack 100 for a long time, control unit 120 causes notification unit 150 to notify the degree of deterioration. For example, if 5 LEDs are provided and the LEDs correspond to the degradation degree 1 to 1, the notification unit 150 turns on only the LEDs corresponding to the determined degradation degree for 5 seconds. All the LEDs may be blinked with the degree of degradation E. Here, the notification of the degree of deterioration D or E corresponds to a notification of recommendation to discard.
On the other hand, if the operation unit 180 is not pressed for a long time, the notification unit 150 notifies the remaining battery level using 5 LEDs. For example, all the LEDs are turned off when the remaining battery level is 0 to 10%, 1 LED is turned on when the remaining battery level is 11 to 20%, and 2 LEDs are turned on when the remaining battery level is 21 to 40%. In addition, 3 LEDs are lighted when the residual battery amount is 41-60%, 4 LEDs are lighted when the residual battery amount is 61-80%, and 5 LEDs are lighted when the residual battery amount is 81-100%.
(4) Disposal of waste
When the deterioration degree notified by the notification unit 150 is D or E through the above-described processing, the control unit 120 executes the discard mode when the user presses the operation unit 180 for a long time. The long press is, for example, 7 seconds. The control unit 120 causes the notification unit 150 to display a notification for notifying the discarding mode. Fig. 9 (a) to (b) show an outline of the disposal process performed by the charge/discharge system 1000. For example, the notification unit 150 performs a stream display in which the plurality of LEDs are lit so that only 1 LED is lit in order from left to right as shown in fig. 9 (a).
As shown in fig. 9 (b), the user attaches battery pack 100 in the disposal mode to charge/discharge device 200. Control unit 120 detects a change in voltage due to attachment, thereby detecting connection between battery pack 100 and charge/discharge device 200. When the user presses the operation unit 180 for a long time in this state, the control unit 120 causes the notification unit 150 to display a notification for notifying the start of the waste discharge. For example, the notification unit 150 blinks all of the plurality of LEDs, as in fig. 6 (c). Second communication unit 170 transmits an instruction to start waste discharge to charge/discharge device 200. The communication unit 230 of the charge/discharge device 200 receives the instruction to start the waste discharge. Accordingly, the reception unit 240 receives an instruction to start the waste discharge. That is, when battery pack 100 notifies a discarding advice made based on the determined degree of deterioration and receives an instruction to start discarding discharge in accordance with the discarding advice, receiving unit 240 receives the instruction to start discarding discharge from battery pack 100.
When receiving an instruction to start discarding discharge in receiving unit 240, charge/discharge circuit 210 performs discharge of battery pack 100 to a second level lower than the first level. The charge/discharge circuit 210 terminates the discharge when the remaining battery level of the battery 110 reaches the second level. When detecting the end of discharge, control unit 120 of battery pack 100 causes notification unit 150 to display a notification for notifying the end of discharge. For example, the notification unit 150 turns off all of the plurality of LEDs, as in fig. 6 (f).
The operation of the charge/discharge system 1000 having the above structure will be described. Fig. 10 is a timing chart showing a procedure of disposal processing by the charge/discharge system 1000. Charge/discharge device 200 is connected to battery pack 100 (S200). Battery pack 100 determines the degree of deterioration (S202). Battery pack 100 notifies a discard advice (S204) and receives an instruction (S206). Battery pack 100 transmits a discard instruction to charge/discharge device 200 (S208). The charge and discharge device 200 performs the discharge to the second level (S210). Charge/discharge device 200 transmits the end of discharge to battery pack 100(S212), and battery pack 100 notifies the end (S214).
According to the present embodiment, since notification unit 150 of battery pack 100 notifies various information, discharge for disposal can be performed even without information terminal device 300. Further, since discharge for disposal is executed without the information terminal device 300, the degree of freedom of the configuration can be improved.
An outline of one embodiment of the present disclosure is as follows. Another embodiment of the present disclosure is also a charge/discharge system (1000). The charge/discharge system (1000) is provided with: a battery pack (100); and a charging/discharging device (200), wherein the battery pack (100) is detachably attached to the charging/discharging device (200), and the charging/discharging device (200) performs charging or discharging to a first level when the battery pack (100) is attached. The battery pack (100) notifies a discarding advice made based on the determined degree of deterioration of the battery pack (100), and accepts a discarding instruction corresponding to the discarding advice, and the charge/discharge device (200) performs discharge to a second level lower than the first level on the battery pack (100) that accepted the discarding instruction.
Still another embodiment of the present disclosure is also a charge/discharge device (200). The battery pack (100) is attachable to and detachable from the device, and the charge/discharge device (200) includes: a charging/discharging unit (210) that, when the battery pack (100) is mounted, performs charging or discharging to a first level by the charging/discharging unit (210); and a reception unit (240) that receives a discarding instruction from the battery pack (100) when the battery pack (100) notifies a discarding advice made based on the determined degree of deterioration of the battery pack (100) and receives the discarding instruction corresponding to the discarding advice. When a discarding instruction is accepted by an acceptance unit (240), a charge/discharge unit (210) discharges the battery pack (100) to a second level lower than the first level.
The present disclosure has been explained above based on the embodiments. The embodiment is an example, and those skilled in the art will understand that various modifications are possible in combination of these respective constituent elements or respective processing procedures, and such modifications are also within the scope of the present disclosure.
Industrial applicability
According to the present disclosure, the secondary battery pack can be safely discarded using various states managed in the secondary battery pack.
Description of the reference numerals
100: a battery pack; 110: a storage battery; 120: a control unit; 130: a storage unit; 140: a first communication unit; 150: a notification unit; 160: a determination unit; 170: a second communication unit; 180: an operation unit; 200: a charging and discharging device; 210: a charge and discharge circuit; 220: a control unit; 230: a communication unit; 240: a reception unit; 300: an information terminal device; 310: a first communication unit; 320: a control unit; 330: a storage unit; 340: a display unit; 350: an operation section; 360: a second communication unit; 400: a network; 500: a server device; 1000: a charging and discharging system.

Claims (7)

1. A charge/discharge system is provided with:
a battery pack; and
a charge and discharge device to which the secondary battery pack is attachable and detachable, the charge and discharge device performing charging or discharging to a first level with the secondary battery pack attached,
wherein the battery pack determines a degree of deterioration of the battery pack, transmits the degree of deterioration to an information terminal device, and receives a discard instruction based on the degree of deterioration from the information terminal device,
the charge and discharge device performs discharge of the secondary battery pack, which has received the discarding instruction, to a second level lower than the first level.
2. The charging and discharging system according to claim 1,
when the battery pack enters a capacity region lower than the first rank, the battery pack transmits a notice of completion of preparation for discarding to the information terminal device.
3. Charging and discharging system according to claim 1, wherein,
when the discharge of the secondary battery pack is completed, the secondary battery pack transmits a notice of completion of preparation for disposal to the information terminal device.
4. A charging and discharging system is provided with:
a battery pack; and
a charge-discharge device to which the secondary battery pack is attachable and detachable, the charge-discharge device performing charging or discharging to a first level with the secondary battery pack attached,
wherein the battery pack notifies a discarding advice made based on the determined degree of deterioration of the battery pack, and accepts a discarding instruction corresponding to the discarding advice,
the charge/discharge device performs discharge to a second level lower than the first level on the battery pack that received the discard instruction.
5. Charging and discharging system according to any one of claims 1 to 4, wherein,
the battery pack stores a threshold value larger than a reference value of a voltage for determining a deterioration state of the battery pack, and when the voltage is equal to or less than the threshold value, the battery pack is discharged until the voltage reaches the reference value, determines the deterioration state, and performs charging after the deterioration state is determined.
6. A charge/discharge device in which a battery pack is attachable to and detachable from the charge/discharge device, the charge/discharge device comprising:
a charge and discharge section that performs charging or performs discharging to a first level in a case where the secondary battery pack is mounted; and
a reception unit that receives a disposal instruction from the battery pack when the battery pack determines a degree of deterioration of the battery pack, transmits the degree of deterioration to an information terminal device, and receives the disposal instruction from the information terminal device based on the degree of deterioration,
wherein, when the reception unit receives a discard instruction, the charge/discharge unit discharges the battery pack to a second level lower than the first level.
7. A charge/discharge device in which a battery pack is attachable to and detachable from the charge/discharge device, the charge/discharge device comprising:
a charge and discharge portion that performs charging or discharging to a first level in a case where the secondary battery pack is mounted; and
a reception unit that receives a disposal instruction from the battery pack when the battery pack notifies a disposal advice made based on the determined degree of degradation of the battery pack and receives a disposal instruction corresponding to the disposal advice,
wherein, when the reception unit receives a discard instruction, the charge/discharge unit discharges the battery pack to a second level lower than the first level.
CN202180013890.8A 2020-03-27 2021-03-10 Charging and discharging system and charging and discharging device Pending CN115104231A (en)

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JP2020058758A JP7457943B2 (en) 2020-03-27 2020-03-27 Charge/discharge system, charge/discharge device
PCT/JP2021/009434 WO2021193048A1 (en) 2020-03-27 2021-03-10 Charging/discharging system and charging/discharging device

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JP3638102B2 (en) 1999-09-30 2005-04-13 Ｎｅｃトーキン栃木株式会社 Battery pack
US8054189B2 (en) * 2008-10-16 2011-11-08 Walter Kidde Portable Equipment Inc. Life safety device with automatic battery discharge at the end of life
WO2016006152A1 (en) 2014-07-11 2016-01-14 パナソニックＩｐマネジメント株式会社 Storage battery pack, and storage battery pack operation method
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