Charging and discharging control system and charging and discharging control method

Abstract

The present application is to solve the problem in order to improve the safety, provide a kind of charge-discharge control system and charge-discharge control method, can be real-time to the battery internal state of vehicle actual work High-precision analysis, and can be according to the analysis with high precision to battery control.To solve the above problems, a kind of battery charge-discharge control system 1, with: image acquisition unit 10, configuration in the battery 100 of liquid battery and the internal image of battery 100 is photographed;Transfer section 30, transfer image data and control signal photographed by image acquisition unit;And, control section 14, 50, according to the image data from transfer section to battery charging and discharging control.

Description

TECHNICAL FIELD

[0001] The present application relates to a charge-discharge control system and a charge-discharge control method. BACKGROUND

[0002] The conventional charge-discharge control system and the charge-discharge control method determine the deterioration state of the battery in real time from the actual operation using various sensors to input voltage, current, and temperature from the battery using a battery deterioration determination model constructed in advance on the battery electronic control unit (ECU) in the vehicle by experiment or the like, to perform charge-discharge at a rate suitable for the remaining battery capacity to ensure safety (for example, refer to Patent Literature 1). For example, it is possible to prevent the battery from becoming an unsafe state by stopping the charge-discharge of the battery with a greater degree of deterioration. Recently, attempts have been made to improve the accuracy of charge-discharge control by more closely grasping the deterioration state of the battery in combination with a method of optically observing the inside of the battery from the outside of the battery (for example, refer to Patent Literatures 2 to 5).

[0003] [Prior Art Documents]

[0004] (Patent Literature)

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2012-85452

[0006] Patent Literature 2: Japanese Patent Application Publication No. 2014-116251

[0007] Patent Literature 3: Japanese Patent Application Publication No. 2020-038756

[0008] Patent Literature 4: Japanese Patent No. 6414501

[0009] Patent Literature 5: Chinese Patent Application Publication No. 109870112 SUMMARY

[0010] [Problems to be Solved by the Invention]

[0011] In the above-described conventional technology, for example, it is considered that the load tolerance of the battery case is reduced due to changes in internal pressure of active materials and electrolytes generated by charge-discharge of the battery by providing an observation window on the battery case. In addition, as other internal analysis methods for actual working batteries without cutting or the like of the battery, X-ray CT methods and electromagnetic induction methods are proposed, but in the current package structure or the like of the actual working battery, sufficient resolution cannot be obtained, the structure size of the method is large and not suitable for installation in an actual vehicle, and therefore it is considered that it is difficult to contribute to improvement in the accuracy of charge-discharge control in an actual vehicle.

[0012] In addition, as another method, a method in which a state estimation model of a previously used actual operation battery is further refined based on a performance evaluation result of a simulation battery using a small-sized laminated battery / coin battery or the like that simulates a structure of an actual operation battery material or the like and a research and development result of in-situ observation or the like under conditions simulating operation of a vehicle is cited as another method. However, in this case, since the conditions of the actual operation battery of the vehicle and the simulation battery are not completely identical, it is considered that there is a possibility that battery control cannot be sufficiently performed depending on the difference in conditions.

[0013] In order to improve the safety of a battery during charging and discharging, the present application aims to provide a charging and discharging control system and a charging and discharging control method that can analyze the internal state of a battery that is actually operated in a vehicle in real time with high precision and can control the battery with high precision based on the analysis.

[0014] [Technical means for solving the problem]

[0015] In order to achieve the above object, the present application provides a charging and discharging control system of a battery, comprising: an image acquisition unit configured in the inside of a battery composed of an all-solid-state battery and capturing an image of the inside of the battery; a transfer unit transferring image data and a control signal captured by the image acquisition unit; and a control unit controlling charging and discharging of the battery based on the image data from the transfer unit.

[0016] In addition, the present application provides a charging and discharging control system of a battery (for example, the charging and discharging control system 1 described later), comprising: an image acquisition unit (for example, the image acquisition unit 10 described later) configured in the inside of a battery composed of a liquid battery (for example, the cylindrical lithium ion battery 100, the square battery 100A of a vortex electrode, the square lithium ion secondary battery 100B, and the coin-shaped lithium battery 100C described later) and capturing an image of the inside of the battery; a transfer unit (for example, the transfer unit 30 described later) transferring image data and a control signal captured by the image acquisition unit; and a control unit (for example, the electronic control unit 50, the control circuit 14 described later) controlling charging and discharging of the battery based on the image data from the transfer unit.

[0017] Further, the present application provides a charge-discharge control system and a charge-discharge control method for a battery. The charge-discharge control method includes the steps of: capturing an image of the inside of a battery (for example, a cylindrical lithium ion battery 100, a square battery 100A with a spiral electrode, a square lithium ion secondary battery 100B, or a coin-shaped lithium battery 100C described later); transferring the captured image data; determining the state of the battery in real time based on the image data; transferring a control signal of the determination result; and controlling the charge and discharge of the battery based on the control signal.

[0018] With the above structure, the inside of a battery, which is either a solid-state battery or a liquid battery, can be observed in situ during actual operation at high resolution without damage, the internal condition can be determined, and control can be applied from the outside.

[0019] Further, the image acquisition unit and the transfer unit are separated from the electrolyte inside the battery by a separation member (for example, a housing 15 described later) that is resistant to the electrolyte and allows transmission of electric waves. Thus, the image acquisition unit and the transfer unit can be maintained in a state in which they are not in contact with the electrolyte containing salt, and the function of the charge-discharge control system can be maintained.

[0020] Further, the image acquisition unit has a light source (for example, a light source 12 described later) and a capturing element (for example, a capturing element 11 described later), and the light source and the capturing element are covered by a portion of the separation member that allows light to pass through (for example, an optical front cover 152 described later).

[0021] Further, the entire separation member is covered by a film laminate, and in the portion that allows transmission of the electric waves, any one of polyethylene, modified polyethylene, polypropylene, modified polypropylene, and ionomer is arranged, and a connection portion that is electrically connected to the battery is connected by heat sealing and is configured to prevent the electrolyte from intruding into a side of the light source and the capturing element that is closer to the battery than the separation member. Thus, the separation member that separates the image acquisition unit and the transfer unit from the electrolyte can be easily realized.

[0022] Further, the battery supplies power to the image acquisition unit, the transfer unit, and the control unit. Thus, a power source for supplying power to the image acquisition unit, the transfer unit, and the control unit can be prepared without the need for additional preparation.

[0023] Further, the transfer unit has a battery internal transceiver (for example, a wave transceiver 31 described later) arranged inside the battery, and the battery has a case (for example, a cylindrical can 120 and a cover assembly 140 described later) having a thick wall portion and a thin wall portion, and the battery internal transceiver is arranged near the thin wall portion. Thus, data transfer between the inside and the outside of the battery in the transfer unit can be easily performed.

[0024] Further, the aforementioned control section has a battery-internal control section (for example, the control circuit 14 described later) disposed inside the aforementioned battery, and a battery-external control section (for example, the electronic control unit 50 described later) disposed outside the aforementioned battery, the aforementioned transfer section transfers image data photographed by the aforementioned image acquisition section to the outside of the aforementioned battery, the aforementioned battery-external control section transfers a control signal determined from the aforementioned image data to the inside of the aforementioned battery using the aforementioned transfer section, and the aforementioned battery-internal control section that has received the aforementioned control signal performs charge and discharge control of the aforementioned battery according to the aforementioned control signal. Thus, charge and discharge control corresponding to the state of the battery can be performed from the outside of the battery.

[0025] Further, the aforementioned determination is performed by an electronic control unit of the vehicle (for example, the electronic control unit 50 described later). Thus, charge and discharge control of the battery can be performed collectively by the electronic control unit, and control related to other control can be performed.

[0026] (EFFECTS OF THE INVENTION)

[0027] According to the present application, in order to improve safety, a charge and discharge control system and a charge and discharge control method can be provided that can perform high-precision analysis of the internal state of a battery actually operated by a vehicle in real time, and can control the battery with high precision according to the analysis. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a view illustrating a case where the charge and discharge control system of the embodiment of the present application is installed in a vehicle.

[0029] Figure 2 is a view illustrating the structure of the charge and discharge control system of the embodiment of the present application.

[0030] Figure 3 is a sectional view of a cylindrical lithium ion battery illustrating the image acquisition section and the transfer section of the charge and discharge control system of the embodiment of the present application provided in the cylindrical lithium ion battery.

[0031] Figure 4 is an enlarged view illustrating the image acquisition section and the transfer section of the charge and discharge control system of the embodiment of the present application provided in a cylindrical lithium ion battery.

[0032] Figure 5 is a sectional view of a square battery illustrating the image acquisition section and the transfer section of the charge and discharge control system of the embodiment of the present application provided in the square battery.

[0033] Figure 6 is a sectional view of a square lithium ion secondary battery illustrating the image acquisition section and the transfer section of the charge and discharge control system of the embodiment of the present application provided in the square lithium ion secondary battery.

[0034] Figure 7 This is a cross-sectional view of a coin-shaped battery illustrating the image acquisition unit and the transmission unit of the charge-discharge control system according to an embodiment of the present invention. Detailed Implementation

[0035] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The charging and discharging control system of this embodiment is installed on a vehicle V.

[0036] like Figure 1 As shown, vehicle V includes: a drive wheel W; a drive motor (not shown) connected to the drive wheel W; and a battery pack P that exchanges power with the drive motor. Furthermore, in this embodiment, vehicle V accelerates and decelerates using the power generated by the drive motor, but the invention is not limited to this. For example, vehicle V may be a hybrid vehicle equipped with a drive motor and an engine as power sources. Additionally, the charge / discharge control system can also be used for purposes other than the vehicle itself, such as in a control unit (CU) and a battery, or as a backup power source consisting of a battery pack.

[0037] A drive motor (not shown) is connected to the drive wheel W via a power transmission mechanism (not shown). Electricity from the battery pack P is converted into three-phase alternating current and supplied to the drive motor (not shown). The torque generated by the drive motor is transmitted to the drive wheel W via the power transmission mechanism (not shown), rotating the drive wheel W and causing the vehicle V to move. Additionally, when the vehicle V decelerates, the drive motor functions as a generator, producing regenerative power and simultaneously applying a regenerative braking torque corresponding to the magnitude of this regenerative power to the drive wheel W. The regenerative power generated by the drive motor is appropriately charged to the battery pack P.

[0038] like Figure 2 As shown, the charge / discharge control system 1 includes an image acquisition unit 10, a transmission unit 30 (radio wave transceiver unit 31 and radio wave transceiver unit 32), and a control unit (control circuit 14 and electronic control unit 50). In the charge / discharge control system 1, image data of the interior of the battery pack P acquired by the image acquisition unit 10 is transmitted via the transmission unit 30 to the electronic control unit 50, which serves as an external control unit for the battery, and the electronic control unit 50 controls the charging and discharging of the battery pack P. The data transmitted and received between the radio wave transceiver unit 31 and the radio wave transceiver unit 32 may include data such as time, current, voltage, or values ​​from other sensors, such as temperature.

[0039] The image acquisition unit 10 includes, for example, an imaging element 11 composed of a CCD or the like, and a light source 12 composed of, for example, an LED or the like. The imaging element 11 and the light source 12 are electrically connected to a control circuit 14. The light source 12 illuminates a predetermined portion inside the battery pack P under the control of the control circuit 14, which is a control unit inside the battery. The imaging element 11 is configured to capture an image of the predetermined portion.

[0040] The transceiver unit 30 includes a radio transceiver 31 serving as an internal transceiver unit and a radio transceiver 32 serving as an external transceiver unit. The radio transceiver 31, along with the imaging element 11, light source 12, and control circuitry 14 of the image acquisition unit 10, is housed inside the battery pack P. The radio transceiver 32 is located outside the battery pack P and inside the vehicle V. The radio transceiver 31 wirelessly transmits images captured by the imaging element 11 from inside the battery pack P to the external radio transceiver 32 via radio waves such as Wi-Fi. The radio transceiver 32 is configured to output image data from the radio transceiver 31 to an electronic control unit 50 located outside the battery pack P and inside the vehicle V.

[0041] The electronic control unit 50 includes a processor for performing various calculations, a storage device for storing various information, and an input / output device for controlling the data input / output of the radio wave transceiver unit 32. The electronic control unit 50's storage medium pre-stores a battery state estimation model constructed from various data, including image data. The electronic control unit 50 is configured to output control signals to the control circuit 14 disposed inside the cylindrical lithium-ion battery 100 based on image data from the cylindrical lithium-ion battery 100 to perform charge / discharge control. The data pre-stored in the electronic control unit 50's storage medium can be configured to improve the accuracy of the stored battery state estimation model or the battery state estimation model external to the vehicle by upgrading it with data acquired during actual vehicle operation.

[0042] The battery pack P consists of cylindrical lithium-ion batteries 100, which are liquid-state batteries. For example... Figure 3 As shown, the cylindrical lithium-ion battery 100 has an electrode assembly 110, a cylindrical can 120, a center pin 130, and a cover assembly 140.

[0043] The electrode assembly 110 includes: a negative electrode plate 111 having a negative electrode active material such as graphite; a positive electrode plate 113 having a positive electrode active material such as lithium cobalt oxide; and a separator 112 disposed between the negative electrode plate 111 and the positive electrode plate 113 to prevent short circuits and to allow lithium ion movement. The negative electrode plate 111, the positive electrode plate 113, and the separator 112 are wound into a cylindrical shape and housed in a cylindrical container 120. A negative electrode tab 114 is electrically connected to the lower part of the negative electrode plate 111. A positive electrode tab 115 is electrically connected to the upper part of the positive electrode plate 113.

[0044] The cylindrical can 120 has a cylindrical surface 121 having a predetermined diameter, and a substantially circular plate-shaped bottom surface 122 located at a lower portion of the cylindrical surface 121. An upper portion of the cylindrical can 120 is open. The electrode assembly 110 is inserted from the upper portion of the cylindrical can 120. The negative tab 114 of the electrode assembly 110 is welded to the bottom surface 122 of the cylindrical can 120, and the cylindrical can 120 constitutes a negative electrode. A lower surface of the electrode assembly 110 is provided with a lower insulating plate 117. An upper surface of the electrode assembly 110 is provided with an upper insulating plate 118. Thus, the electrode assembly 110 and the cylindrical can 120 are prevented from electrically short-circuiting.

[0045] The center pin 130 is disposed in the space 116 formed substantially centrally of the electrode assembly 110. The center pin 130 has a rod shape, and a hollow portion 132 is formed in an inner portion of the center pin 130.

[0046] In the cap assembly 140, an annular insulating gasket 145 is provided on an inner side of the upper portion of the cylindrical can 120. An electrically conductive safety vent 141 connected to the positive tab 115 is provided on an inner side of the insulating gasket 145. The electrically conductive safety vent 141 ruptures when an internal pressure in the cylindrical can 120 rises, and releases gas to the outside. A current interrupt plate 142 is provided on an upper side of the electrically conductive safety vent 141, and the current interrupt plate 142 is broken together with the electrically conductive safety vent 141 when the electrically conductive safety vent 141 ruptures, thereby interrupting current. A positive temperature element 143 is provided on an upper side of the current interrupt plate 142, and the positive temperature element 143 blocks current when an overcurrent flows. An electrically conductive positive cap 144 that constitutes and supplies a positive voltage is provided on an upper side of the positive temperature element 143.

[0047] A bead portion 123 recessed inwardly of the cylindrical can 120 in such a manner that the cap assembly 140 does not come off from the outside is formed on the cylindrical can 120, and a clamping portion 124 bent inwardly is formed on an upper side of the bead portion 123. The bead portion 123 and the clamping portion 124 fix and support the cap assembly 140 on the cylindrical can 120.

[0048] An electrolyte solution not shown is injected into the cylindrical can 120. The electrolyte solution enables lithium ions generated by electrochemical reaction between the negative plate 111 and the positive plate 113 to move when the cylindrical lithium ion battery 100 is charged and discharged.

[0049] The imaging element 11 and the light source 12 of the image acquisition portion 10, the control circuit 14, and the electric wave transceiver portion 31 are disposed inside a housing 15 disposed inside the cylindrical lithium ion battery 100. As shown in FIG. 1, the housing 15 is disposed in a space 116 formed substantially centrally of the electrode assembly 110. Figure 3As shown, the housing 15 constitutes an insulating component that is resistant to the electrolyte and allows light from the light source 12 and transmitted radio waves to pass through. The entire housing 15 also includes an optical front end cover 152, described later, and is covered by a thin-film laminate. The thin-film laminate can be, for example, polyethylene, modified polyethylene, polypropylene, modified polypropylene, or an ionomer. The housing 15 isolates the imaging element 11, the light source 12, the control circuit 14, and the radio wave transceiver 31 from the electrolyte. Power from the cylindrical lithium-ion battery 100 is supplied to the imaging element 11, the light source 12, the control circuit 14, and the radio wave transceiver 31. The conductor electrically connected to the negative electrode plate 111 and positive electrode plate 113 of the cylindrical lithium-ion battery 100 is connected to the housing 15 by heat fusion in the connection portion, which is an inlet / outlet portion that enters the interior of the housing 15 relative to the housing 15 and extends to the exterior of the housing 15. The structure is formed to prevent the electrolyte of the cylindrical lithium-ion battery 100 from entering the inner side of the housing 15, which is closer to the imaging element 11 and the light source 12 than the housing 15.

[0050] The upper part of the cylindrical lithium-ion battery 100, i.e., the upper part of the cylindrical can 120 as described above, is open. Therefore, compared with the other parts of the cylindrical lithium-ion battery 100, i.e., the lower and side parts of the cylindrical lithium-ion battery 100, the casing of the cylindrical lithium-ion battery 100 is constructed to have thin walls. The housing 15 is disposed near the upper part of the cylindrical lithium-ion battery 100 that constitutes this thin wall, that is, at a position opposite to the upper ends of the negative electrode plate 111, the positive electrode plate 113, and the separator 112.

[0051] like Figure 4 As shown, a transparent hemispherical optical front cover 152, which allows light to pass through, is installed on the lower part of the housing 15 in a manner that covers the imaging element 11 and the light source 12 and protrudes downwards. Light from the light source 12 passes through the optical front cover 152 and illuminates the upper ends of the negative electrode plate 111, the positive electrode plate 113, and the diaphragm 112. Furthermore, the light that is reflected from the upper ends of the negative electrode plate 111, the positive electrode plate 113, and the diaphragm 112 passes through the optical front cover 152 and enters the imaging element 11.

[0052] Next, the battery charging and discharging control method will be explained. In the battery charging and discharging control method, the first step is to take an image of the inside of the battery. Specifically, under the control of the control circuit 14, light is shone from the light source 12 onto the upper part of the negative plate 111, the positive plate 113 and the separator 112, and the image of the upper part is taken by the imaging element 11.

[0053] Next, the step of transmitting the captured image data is performed. Specifically, the image data captured by the imaging element 11 is transmitted from the radio transceiver unit 31 to the radio transceiver unit 32 via radio waves.

[0054] Next, a step of determining the state of the battery in real time from the image data and controlling charging and discharging of the battery is performed. Specifically, the electronic control unit 50 compares the image data received by the radio transceiver section 32 with data on the state of deterioration and the like of the negative electrode plate 111, the positive electrode plate 113, and the separator 112 that is stored in advance, and determines the state of deterioration and the like of the negative electrode plate 111, the positive electrode plate 113, and the separator 112 in real time. Also, the electronic control unit 50 sends a control signal for the result of this determination of charging and discharging of the cylindrical lithium-ion battery 100 with respect to the state of deterioration and the like of the negative electrode plate 111, the positive electrode plate 113, and the separator 112 from the radio transceiver section 32 to the radio transceiver section 31. The control circuit 14 inputs the control signal from the radio transceiver section 31, and performs charging and discharging control such as charging stop and discharging stop of the cylindrical lithium-ion battery 100 in accordance with the control signal.

[0055] According to the present embodiment, the following effects are obtained.

[0056] In the present embodiment, the charging and discharging control system 1 is provided with: the image acquisition section 10 that is disposed inside the cylindrical lithium-ion battery 100 and that captures an image of the inside of the cylindrical lithium-ion battery 100; the transfer section 30 that transfers image data and a control signal captured by the image acquisition section 10; and the control section (the control circuit 14, the electronic control unit 50) that controls charging and discharging of the cylindrical lithium-ion battery 100 in accordance with the image data from the transfer section 30.

[0057] In addition, in the present embodiment, the charging and discharging control method has the steps of: capturing an image of the inside of the battery; transferring the captured image data; determining the state of the battery in real time from the image data and transferring a control signal for the result of the determination; and controlling charging and discharging of the battery in accordance with the control signal.

[0058] Thus, in-situ internal observation of the cylindrical lithium-ion battery 100 during actual operation can be performed at high resolution without damage, the internal condition can be determined, and control can be applied from the outside.

[0059] In the electronic control unit, a state estimation model of the battery constructed from various data including images can be stored in advance, and a structure for upgrading this model or an external model in accordance with data acquired during actual vehicle operation to improve accuracy can be provided (described above). Thus, more accurate control can be achieved in accordance with the deterioration state of each battery group and battery.

[0060] In addition, in the present embodiment, the image acquisition section 10 and the transfer section 30 are isolated from the electrolyte inside the cylindrical lithium-ion battery 100 by the case 15 made of a separation member that is resistant to the electrolyte and that allows transmission of electric waves. Therefore, it is possible to maintain the image acquisition section 10 and the transfer section 30 in a state in which they are not in contact with the electrolyte containing salt, and it is possible to maintain the function of the charge / discharge control system 1.

[0061] In addition, in the present embodiment, the entire case 15 as a separation member also includes an optical front cover 152 and is covered by a film laminate. As the film laminate, for example, any one of polyethylene, modified polyethylene, polypropylene, modified polypropylene, and ionomer is used. Therefore, it is possible to easily realize a separation member that is resistant to the electrolyte and that allows transmission of electric waves.

[0062] In addition, in the present embodiment, the cylindrical lithium-ion battery 100 supplies power to the image acquisition section 10, the transfer section 30, and the control section (the control circuit 14 and the electronic control unit 50). Therefore, it is possible to not need to additionally prepare a power source that supplies power to the image acquisition section 10, the transfer section 30, the control circuit 14, and the electronic control unit 50.

[0063] In addition, in the present embodiment, the transfer section 30 has the electric wave transceiver section 31 as a battery-internal transceiver section arranged inside the cylindrical lithium-ion battery 100, and the cylindrical lithium-ion battery 100 has a cylindrical can 120 as a case having a thick wall portion and a thin wall portion, and a lid assembly 140, and the electric wave transceiver section 31 is arranged in the vicinity of the upper portion of the cylindrical lithium-ion battery 100 as the thin wall portion. Therefore, it is possible to easily perform transfer of data in the transfer section 30 between the inside and the outside of the cylindrical lithium-ion battery 100.

[0064] In addition, in the present embodiment, the transfer section 30 transfers image data captured by the image acquisition section 10 to the outside of the cylindrical lithium-ion battery 100, the electronic control unit 50 sends a control signal for the result of the determination of the charge / discharge of the cylindrical lithium-ion battery 100 with respect to the state of deterioration and the like of the negative electrode plate 111, the positive electrode plate 113, and the separator 112 that are stored in advance from the electric wave transceiver section 32 to the electric wave transceiver section 31. The control circuit 14 inputs the control signal from the electric wave transceiver section 31 and performs charge / discharge control such as charge stop and discharge stop of the cylindrical lithium-ion battery 100 in accordance with the control signal. Therefore, it is possible to perform charge / discharge control corresponding to the state of the cylindrical lithium-ion battery 100 from the outside of the cylindrical lithium-ion battery 100.

[0065] In addition, in the present embodiment, the determination and control of the control section are performed by the electronic control unit of the vehicle V. Thus, the charge and discharge control of the cylindrical lithium-ion battery 100 can be collectively performed by the electronic control unit, and control related to other control can be performed.

[0066] Next, an example in which the radio transceiver 31 of the image acquisition section 10 and the transfer section 30 of the embodiment of the present application is provided on a square battery of a spiral electrode will be described.

[0067] As shown in FIG. 1, a square battery 100A of a spiral electrode composed of a nonaqueous electrolyte secondary battery such as a lithium-ion secondary battery includes an electrode body 110A in which first and second electrode plates composed of positive and negative electrodes, respectively, are laminated and wound with a separator 103A interposed therebetween, and is housed in an outer case (not shown). Figure 5 The first and second electrode plates are composed of a core body composed of a metal foil, on the surface of which an active material layer is laminated. The positive electrode core body is composed of an aluminum foil, and the negative electrode core body is composed of a copper foil. The active material layers of the opposing first and second electrode plates are insulated by the separator.

[0068] In the electrode body 110A in which the first and second electrode plates and the separator 103A are laminated and wound in a spiral shape with the axis directed in the up-down direction, the opposing surfaces are flat surfaces 111A, and the corner portions on both sides of the pair of flat surfaces 111A are curved corner portions 112A curved with a predetermined radius of curvature. That is, the electrode body 110A in which the first and second electrode plates are wound in a spiral shape with the separator 103A interposed therebetween is pressed in a manner in which the flat surfaces are pinched from the side by a pressing plate, and the opposing surfaces become flat surfaces 111A. The separator 103A insulates the first and second electrode plates from each other. In the electrode body 110A, the width of the separator 103A in the up-down direction is wider than the width of the first and second electrode plates in the same direction. Thus, in the electrode body 110A, even if the winding positions of the first and second electrode plates are slightly shifted, the first and second electrode plates are reliably insulated by the separator 103A.

[0069] In the electrode body 110A, the first electrode plate constitutes an outermost peripheral electrode plate 106A. The first electrode plate constituting the outermost peripheral electrode plate 106A is composed of an active material layer provided on the surface of the core body, but does not have an active material layer provided on the terminal portion, and the core body terminal without the active material layer is disposed at the curved corner portion 112A. A chamfered portion 107A is formed on the edge portion 108A of the corner of the first electrode plate as the outermost peripheral electrode plate 106A. In order to cover the terminal of the outermost peripheral electrode plate 106A, a winding prevention insulating tape 113A is attached to the curved corner portion 112A along the curved corner portion 112A. The winding prevention insulating tape 113A fixes the terminal of the outermost peripheral electrode plate 106A to the electrode body 110A.

[0070] A foldback tab 109A is provided on the electrode body 110A, the foldback tab 109A being configured to cut off a portion of the core of the outermost peripheral electrode plate 106A located on the flat surface 111A. The foldback tab 109A serves as a lead for electrically connecting the outermost peripheral electrode plate 106A to an outer casing (not shown).

[0071] The housing 15 is disposed inside the outer casing (not shown) and near the upper part of the vortex-shaped electrode body 110A, that is, opposite to the upper ends of the first electrode plate, the second electrode plate, and the separator 103. Similar to the cylindrical lithium-ion battery 100, the optical front cover 152 is mounted on the housing 15 in a downward-protruding manner. Through this structure, power from the vortex-shaped electrode of the square battery 100A is supplied to the imaging element 11, the light source 12, the control circuit 14, and the radio wave transceiver unit 31. The imaging element 11 of the image acquisition unit 10 captures an image of the upper end of the vortex-shaped electrode body 110A, that is, the upper end of the first electrode plate, the second electrode plate, and the separator 103.

[0072] Next, an example of the image acquisition unit 10 and the radio wave transceiver unit 31 of the transmission unit 30 of the embodiment of the present invention being provided on a square lithium-ion secondary battery 100B will be described.

[0073] like Figure 6 As shown, the square lithium-ion secondary battery 100B has a flat, wound electrode assembly 121B, which is configured to wind a positive and negative electrode with a separator sandwiched between them in a horizontally oriented axial position. An injection hole 110B is formed on the upper battery cover 109B. Furthermore, the external terminal 107B of the negative electrode is connected to the external terminal 108B of the positive electrode. The negative current collector 105B is electrically connected to the external terminal 107B, while the positive current collector 106B is electrically connected to the external terminal 108B. The positive current collector 106B is welded to the positive electrode, and the negative current collector 105B is welded to the negative electrode. The flat, wound electrode assembly 121B is inserted into the square battery container 111B, and non-aqueous electrolyte is injected into the square battery container 111B through the injection hole 110B. The injection hole 110B is then sealed, thus forming the square lithium-ion secondary battery 100B.

[0074] The housing 15 is disposed inside the square battery container 111B and is located at one end of the flat wound electrode assembly 121B in the axial direction. Figure 6 Near the left end, that is, near the end of the flat wound electrode assembly 121B consisting of the positive and negative electrodes sandwiched between the diaphragm ( Figure 6 The position relative to the left end. Although the optical front cover 152 is not in Figure 6 As shown in the text, but from... Figure 6 The housing 15 is installed by protruding from the left to the right.

[0075] This structure provides power from the square lithium-ion secondary battery 100B to the imaging element 11, light source 12, control circuit 14, and radio wave transceiver unit 31. The imaging element 11 of the image acquisition unit 10 is connected to one end of the flat wound electrode assembly 121B formed by winding in the axial direction. Figure 6 The left end), that is, the end of the wound positive electrode, negative electrode and diaphragm in the axial direction ( Figure 6 The image of the left end was taken.

[0076] Next, an example of an embodiment of the present invention having a radio wave transceiver 31 for the image acquisition unit 10 and the transmission unit 30 provided in a coin-shaped lithium battery 100C will be described.

[0077] like Figure 7 As shown, the coin-shaped lithium battery 100C is a coin-shaped lithium battery having a negative electrode sealing plate 101C, a positive electrode shell 102C, a gasket 103C, a separator 104C, a positive electrode 105C, a negative electrode 106C, and an electrolyte (not shown).

[0078] The negative electrode 106C is pressed onto the inner surface of the flat portion 110C of the negative electrode sealing plate 101C, and a diaphragm 104C and a positive electrode 105C are placed on the negative electrode 106C and impregnated with electrolyte. In addition, a gasket 103C is installed on the periphery of the negative electrode sealing plate 101C, and the negative electrode sealing plate 101C and the positive electrode housing 102C are assembled.

[0079] The housing 15 is disposed inside the coin-shaped lithium battery 100C and at the ends of the positive electrode 105C, negative electrode 106C, and separator 104C. Figure 7 The position relative to the right end of the middle. Although the optical front cover 152 is not in Figure 7 As shown in the text, but from... Figure 7 The left end face of the casing 15 protrudes and is embedded with the positive electrode 105C, the negative electrode 106C, and the diaphragm 104C, as shown in the figure. Figure 7 The housing 15 is mounted with a recess formed on the right end shown. With this structure, power from the coin-shaped lithium battery 100C is supplied to the imaging element 11, the light source 12, the control circuit 14, and the radio wave transceiver 31, and the imaging element 11 of the image acquisition unit 10 captures images of the ends of the positive electrode 105C, the negative electrode 106C, and the separator 104C.

[0080] The preferred embodiments of this disclosure have been described above, but this disclosure is not limited to the above embodiments and can be appropriately modified.

[0081] For example, in the present embodiment, the charge-discharge control system is a system for performing charge-discharge control on a battery composed of a liquid battery, but is not limited to this structure. For example, the charge-discharge control system can be a system for performing charge-discharge control on a battery composed of a nickel-hydrogen battery, a laminated lithium-ion battery, and a full-solid-state battery. In this case, as long as the housing 15 that accommodates the imaging element 11, the light source 12, the control circuit 14, and the electric wave transceiver 31 is provided inside the nickel-hydrogen battery, the laminated lithium-ion battery, and the full-solid-state battery, it is acceptable.

[0082] In addition, the liquid battery can include a so-called polymer battery in which part or all of the electrolyte is in a gel state.

[0083] In addition, the separation member that constitutes the housing 15 is composed of a thin film, but is not limited to this. The separation member can be composed of, for example, an ionic liquid layer.

[0084] REFERENCE NUMERALS

[0085] 1 Charge-discharge control system

[0086] 10 Image acquisition section

[0087] 11 Imaging element

[0088] 12 Light source

[0089] 14 Control circuit (control section, in-battery control section)

[0090] 15 Housing

[0091] 30 Transfer section

[0092] 31 Electric wave transceiver

[0093] 50 Electronic control unit (control section, out-of-battery control section)

[0094] 100 Cylindrical lithium-ion battery

[0095] 100A Square battery of spiral electrode

[0096] 100B Square lithium-ion secondary battery

[0097] 100C Coin-shaped lithium battery

[0098] 120 Cylindrical can (box)

[0099] 140 Cover assembly (box)

Claims

1. A charge-discharge control system of a battery, comprising: an image acquisition section configured inside a battery constituted by a full solid battery and capturing an image of the inside of the battery; a transfer section transferring image data captured by the image acquisition section and a control signal; and a control section controlling charging and discharging of the battery based on the image data from the transfer section, wherein the control section has a battery-internal control section configured inside the battery and a battery-external control section configured outside the battery, the transfer section transfers the image data captured by the image acquisition section to the outside of the battery by wireless communication, the battery-external control section transfers a control signal determined based on the image data to the inside of the battery by wireless communication using the transfer section, and the battery-internal control section receives the control signal and controls charging and discharging of the battery based on the control signal.

2. The charge-discharge control system of a battery according to claim 1, wherein the battery supplies power to the image acquisition section, the transfer section, and the control section.

3. The charge-discharge control system of a battery according to claim 1, wherein the transfer section has a battery-internal transceiver section configured inside the battery, the battery has a case having a thick wall portion and a thin wall portion, and the battery-internal transceiver section is configured in the vicinity of the thin wall portion.

4. A charge-discharge control system of a battery, comprising: an image acquisition section configured inside a battery constituted by a liquid battery and capturing an image of the inside of the battery; a transfer section transferring image data captured by the image acquisition section and a control signal; and a control section controlling charging and discharging of the battery based on the image data from the transfer section, wherein the control section has a battery-internal control section configured inside the battery and a battery-external control section configured outside the battery, the transfer section transfers the image data captured by the image acquisition section to the outside of the battery by wireless communication, the battery-external control section transfers a control signal determined based on the image data to the inside of the battery by wireless communication using the transfer section, and the battery-internal control section receives the control signal and controls charging and discharging of the battery based on the control signal.

5. The charge-discharge control system of a battery according to claim 4, wherein the image acquisition section and the transfer section are isolated from an electrolyte constituting the battery by an isolation member resistant to the electrolyte and allowing transmission electric waves to pass therethrough.

6. The charge-discharge control system of a battery according to claim 5, wherein the image acquisition section has a light source and a capturing element, and the light source and the capturing element are covered by a portion of the isolation member allowing the transmission electric waves to pass therethrough.

7. The charge-discharge control system of a battery according to claim 6, wherein the entire isolation member is covered by a film laminate, and any one of polyethylene, modified polyethylene, polypropylene, modified polypropylene, and ionomer is disposed in the portion allowing the transmission electric waves to pass therethrough. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The connection portion electrically connected to the aforementioned battery is connected by heat sealing and is configured to prevent the aforementioned electrolyte from intruding into a structure on the side of the aforementioned light source and the aforementioned image pickup element further than the aforementioned partition member.

8. A charging method for a battery, comprising the steps of: capturing an image of the inside of the battery; transferring the captured image data; determining the state of the battery in real time based on the image data, and transferring a control signal of the result of the determination; and controlling charging and discharging of the battery based on the control signal, in the step of transferring the image data, the control is performed by a battery-internal control unit provided inside the battery, and the captured image data is transferred to the outside of the battery by wireless communication, in the step of transferring the control signal of the result of the determination, the control is performed by a battery-external control unit provided outside the battery, and the control signal determined based on the image data is transferred to the inside of the battery, in the step of controlling charging and discharging of the battery, the battery-internal control unit receiving the control signal controls charging and discharging of the battery based on the control signal.

9. The charging method for a battery according to claim 8, wherein the determination is performed by an electronic control unit of a vehicle.

Images