JP6191501B2 - Charge / discharge system - Google Patents

Description

  The present invention relates to a charge / discharge system that charges and discharges a plurality of power storage devices.

  In the case of a power storage device such as a lithium ion secondary battery, the power storage device is repeatedly charged and discharged for aging and activation before shipment. At this time, charging and discharging may be performed on the plurality of power storage devices in a state where the plurality of power storage devices are placed in a thermostat and maintained at a constant temperature. As charging / discharging of a plurality of power storage devices, for example, in Patent Document 1, a plurality of power storage devices are arranged side by side in the width direction, and a plurality of charge / discharge units are slidably attached along the direction in which secondary batteries are arranged. In addition, a charging / discharging device that performs charging / discharging by connecting a charging / discharging unit to each of the arranged power storage devices is disclosed.

JP 2010-140844 A

  As shown in FIG. 4, when charging and discharging a plurality of power storage devices V... In the constant temperature bath 100, generally, the plurality of power storage devices V. In the example, two in the left-right direction and three in the depth direction are arranged in total 6). For this purpose, the positive electrode cord 101a and the negative electrode cord 101b, which are respectively connected to a charge / discharge circuit (not shown) via a power supply line, correspond to each position of the power storage devices V ... arranged in two dimensions. The thermostat 100 is attached to the ceiling. Since the thermostatic bath 100 has a door and only one surface on which the door opens can be opened, when the terminals Ta and Tb of the power storage device V are attached to or removed from the cords 101a and 101b, the back side of the thermostatic bath 100 Work on the power storage device V arranged at the position becomes difficult, and workability deteriorates. In the case of the charging / discharging device disclosed in Patent Document 1, since charging / discharging is performed on a plurality of power storage devices arranged in one dimension in the width direction, it corresponds to the case of charging / discharging a plurality of power storage devices arranged in two dimensions. Not.

  Therefore, in this technical field, there is a demand for a charge / discharge system that can improve workability when charging / discharging a plurality of power storage devices arranged in two dimensions.

  A charge / discharge system according to one aspect of the present invention is a charge / discharge system that charges / discharges a plurality of power storage devices, and is connected to a plurality of rails disposed above a charge / discharge area and a charge / discharge circuit. And a plurality of cables including a cord that is movable along the rail and that connects the power supply line and the power storage device. Contact power feeding.

  This charge / discharge system is a system for charging / discharging a plurality of power storage devices arranged in a charge / discharge area. For this purpose, the charging / discharging system has a plurality of rails arranged above the charging / discharging area corresponding to the plurality of power storage devices, and a power supply line is wired along each rail. Cables that are movable along each are provided. Each rail has a position above the charge / discharge area corresponding to each position of the power storage device arranged in the charge / discharge area (two-dimensional) and a position above the charge / discharge area corresponding to a position with good workability for the power storage device. And is arranged so as to include at least. As long as the above-described conditions are satisfied, the rails may be arranged above the charge / discharge area. The power supply line is connected to a charge / discharge circuit, and a direct current generated in the charge / discharge circuit flows during charging, and a direct current discharged from the power storage device flows during discharging. Therefore, the power supply line becomes an electric discharge wire when the power storage device is discharged. The cable includes cords (positive and negative cords) that connect the power supply line and the power storage device, and is configured to be movable along the rail at one end. The cord is a cord connected to the positive terminal and the negative terminal of the power storage device. Between the cord included in the cable and the power supply line is a non-contact type by electromagnetic induction, and non-contact power supply is performed during charging. Therefore, non-contact discharge is performed during discharge.

  With such a configuration, in the charge / discharge system, since the cable including the cord can be moved to the rail, work on the power storage device (attaching a cord to each terminal of the power storage device, and connecting the cord from each terminal of the power storage device) When the cable is removed, the work on the power storage device can be facilitated by moving the cable along the rail to a position with good workability. In the charge / discharge system, the cord and the power supply line are non-contact type due to electromagnetic induction, so even if the cable (cord) is moved along the rail (power supply line), the wear powder will Will not occur. Therefore, there is no short circuit between the positive electrode terminal and the negative electrode terminal of the power storage device due to wear powder. Further, in the charge / discharge system, since the cord and the power supply line are non-contact type by electromagnetic induction, depending on the position of the cable (cord) on the rail (by changing the distance between the charge / discharge circuit and the power storage device) In the case of the contact type, the contact resistance does not change due to electric corrosion or the like generated at an arbitrary position, and the accuracy of data such as the voltage at the time of charging / discharging the power storage device does not decrease. Therefore, highly accurate data can be obtained as data at the time of charge / discharge of the power storage device. In this way, the charge / discharge system charges / discharges the plurality of power storage devices arranged in two dimensions by disposing a plurality of rails and allowing each cable (cord) to move along each rail. The workability in the case can be improved. Further, the charging / discharging system can improve the reliability of data at the time of charging / discharging without generating abrasion powder by adopting a non-contact type by electromagnetic induction between the cord and the power supply line.

  In one form of charging / discharging system, a measuring instrument for measuring impedance is connected to the power supply line and an alternating current circuit is connected to the charging direct current generated by the charging / discharging circuit. The AC current for measuring the AC impedance is superimposed, and the superimposed current is passed through the feeder line.

  When determining whether or not the activation of the power storage device has been completed, generally, an AC impedance measurement is performed, and an impedance change is analyzed with respect to a change in the frequency of the AC current passed through the power storage device. When performing an AC impedance measurement, it is necessary to pass an AC current through the power storage device and measure the impedance of the power storage device. For this purpose, a measuring instrument for measuring impedance and an alternating current circuit are connected to the feeder line. Then, an AC current for AC impedance measurement is generated by an AC current circuit, the AC current is superimposed on a DC current for charging, and is supplied to the power supply line. Data obtained from the power storage device via the power supply line by the measuring instrument To measure the impedance of the power storage device. As described above, in the charge / discharge system, the contact resistance does not change depending on the position of the cable (cord) on the rail because the contact between the cord and the power supply line is a non-contact type due to electromagnetic induction. The accuracy of data at the time of charging / discharging is not reduced. Therefore, this charging / discharging system can obtain high-accuracy data when analyzing a change in impedance with respect to a change in frequency of the alternating current by passing a minute alternating current for measuring the alternating current impedance. Measurement reliability can be improved. Moreover, this charging / discharging system can flow a minute alternating current for measuring an alternating current impedance to the power storage device by superimposing the alternating current on the direct current for charging.

  ADVANTAGE OF THE INVENTION According to this invention, workability | operativity when charging / discharging the some electrical storage apparatus arrange | positioned two-dimensionally can be improved.

It is a figure which shows typically the structure of the charging / discharging system which concerns on this Embodiment. It is an enlarged view of the coupling | bond part of the rail of FIG. 1, a feeder, and a cable (code | cord). It is a figure which shows the other example of a rail, (a) is a circumferential rail, (b) is a diagonal rail. It is a figure which shows typically the structure (especially the inside of a thermostat) of the conventional charging / discharging system.

  DESCRIPTION OF EMBODIMENTS Embodiments of a charge / discharge system according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

  In this Embodiment, the charging / discharging system which concerns on this invention is applied to the charging / discharging system used for the activation process before shipment. In the activation step according to the present embodiment, charging / discharging is repeatedly performed on each of the plurality of power storage devices in the thermostat, and when the activation of the power storage device is completed, the charging / discharging on the power storage device is terminated. In this embodiment, in order to determine whether or not activation is completed, a minute alternating current is passed through the power storage device, and a change in the impedance of the power storage device with respect to a change in the frequency of the alternating current is analyzed (using a Cole-Cole plot). ) Determine by AC impedance measurement. The power storage device according to the present embodiment is a power storage device such as a secondary battery or an electric double layer capacitor. The secondary battery is, for example, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. In this embodiment, the power storage device is applied to a lithium ion secondary battery.

  In the power storage device, an electrode assembly, an electrolytic solution, and the like are accommodated in a case. The electrode assembly includes a plurality of positive electrodes, a negative electrode, and a separator, and a sheet-like positive electrode and a negative electrode are laminated via a sheet-like (or bag-like) separator. The electrolytic solution is accommodated in the case and impregnated in the electrode assembly. The electrolytic solution is, for example, an organic solvent-based or non-aqueous electrolytic solution. The case is a case that accommodates the electrode assembly and the electrolytic solution, and is, for example, a square shape. The case is made of a metal such as aluminum or stainless steel. On the upper surface side of the case, a positive electrode terminal connected to a conductive member welded with a plurality of positive electrode tabs and a negative electrode terminal connected to a conductive member welded with a plurality of negative electrode tabs are provided.

  The positive electrode includes a metal foil and a positive electrode active material layer formed on at least one surface of the metal foil. The positive electrode has a tab on which the positive electrode active material layer is not formed at the end of the metal foil. The tab extends to the upper edge of the positive electrode and is connected to the positive terminal via a conductive member. The metal foil is, for example, an aluminum foil or an aluminum alloy foil. The positive electrode active material layer includes a positive electrode active material and a binder. The positive electrode active material layer may contain a conductive additive. The positive electrode active material is, for example, a composite oxide, metallic lithium, or sulfur. The composite oxide includes at least one of manganese, nickel, cobalt, and aluminum and lithium. The binder is, for example, a fluorine-containing resin such as polyvinylidene fluoride, polytetrafluoroethylene, or fluororubber, a thermoplastic resin such as polypropylene or polyethylene, an imide resin such as polyimide or polyamideimide, or an alkoxysilanol group-containing resin. . Examples of the conductive auxiliary agent include carbon black, graphite, acetylene black, and ketjen black (registered trademark).

  The negative electrode includes a metal foil and a negative electrode active material layer formed on at least one surface of the metal foil. The negative electrode has a tab on which the negative electrode active material layer is not formed at the end of the metal foil. The tab extends to the upper edge of the negative electrode and is connected to the negative electrode terminal via a conductive member. The metal foil is, for example, a copper foil or a copper alloy foil. The negative electrode active material layer includes a negative electrode active material and a binder. The negative electrode active material layer may contain a conductive additive. Examples of the negative electrode active material include graphite, highly oriented graphite, carbon such as mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, and SiOx (0.5 ≦ x ≦ 1.5). ) And the like, and boron-added carbon. As the binder and the conductive additive, for example, the same binder and conductive additive exemplified in the positive electrode can be applied. As the binder, carboxymethyl cellulose, methyl cellulose, styrene butadiene rubber, alkoxysilyl group-containing resin, and the like can be applied in addition to the positive electrode examples.

  The separator separates the positive electrode and the negative electrode and allows lithium ions to pass while preventing a short circuit due to contact between the two electrodes. The separator is, for example, a porous film made of a polyolefin resin such as polyethylene (PE) or polypropylene (PP), a woven fabric or a nonwoven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose or the like.

  With reference to FIG.1 and FIG.2, the charging / discharging system 1 which concerns on this Embodiment is demonstrated. FIG. 1 is a diagram schematically showing a configuration of a charge / discharge system 1 according to the present embodiment. FIG. 2 is an enlarged view of a coupling portion of the rail, the feeder line, and the cable (cord) in FIG.

  In the charge / discharge system 1, a plurality of power storage devices V,... Are arranged in a charge / discharge area 2 a (two-dimensional area) in a thermostatic chamber 2, and the plurality of power storage devices V are provided by a charge / discharge device 3 outside the thermostat 2. , ... are charged and discharged at a time. In particular, the charging / discharging system 1 enables the cord to be moved in the thermostat 2 in order to improve workability such as attaching / detaching cords to / from the plurality of power storage devices V,. In addition, the charging / discharging system 1 includes a power supply line and a cord connected to the charging / discharging device 3 in order to prevent generation of wear powder and to improve the reliability of charging / discharging voltage data and analysis data for AC impedance measurement. The space between them is non-contact type power supply (discharge) by electromagnetic induction.

  In the present embodiment, a description will be given of an example in which a total of six power storage devices V, two in the left-right direction and three in the depth direction, are arranged in the charge / discharge area 2a of the thermostat 2. Appropriate numbers and arrangements can be applied to the number of power storage devices that perform charging / discharging in the thermostat 2 and the two-dimensional arrangement according to each number.

  The thermostat 2 will be described. The thermostat 2 is a tank that can maintain the inside of the tank at a constant temperature for a long time. As a basic configuration of the thermostat 2, a conventional well-known thermostat is applied. The thermostat 2 is substantially rectangular and has a space inside. The thermostat 2 has a sufficient charge / discharge area 2a on which six power storage devices V... Arranged at two-dimensional positions can be placed. The constant temperature bath 2 has a door on one side (this one side is the front side), and when the door is opened, only the front side of the bath can be opened. The power storage device V can be taken in and out on the opened front surface, and workability such as attachment / detachment of the cord can be easily performed on the front surface side of the charge / discharge area 2a. In addition, in FIG. 1, the door of the thermostat 2 is not illustrated and the state where the front surface of the thermostat 2 was opened is shown. Further, in FIG. 1, only one power storage device V is shown on the front side of the charge / discharge area 2a.

  In the thermostat 2, six rails 20 (20A... 20F) are arranged on the ceiling 2b above the charge / discharge area 2a. As shown in FIG. 2, the rail 20 has a cross-sectional shape including a U-shaped main body 20a and a guide portion 20b extending downward by a predetermined amount from a tip portion of a portion extending in the left-right direction at the upper end of the U-shape. ing. The rail 20 has a top surface portion of the main body 20a attached to the ceiling 2b. The rail 20 has a position on the ceiling 2b corresponding to each position of the power storage device V arranged at one end side in the charge / discharge area 2a. Yes, the position on the other end side is a position on the ceiling 2b corresponding to each position on the front side of the charge / discharge area 2a with good workability for the power storage device V.

  The rail 20A is a linear very short rail, the position on one end side is a position slightly behind and the leftmost position from the position of the front door, and the position on the other end side is a position on the one end side. It is a position on the front side (position close to the front door). The rail 20B is an L-shaped intermediate-length rail, the position on one end side is slightly behind the position on one end side of the rail 20A, and the position on the other end side is the other end side of the rail 20A. It is a position slightly to the right of the position. The rail 20C is the longest L-shaped rail, the position on one end side is slightly behind the position on one end side of the rail 20B, and the position on the other end side is the other end side of the rail 20B. It is a position slightly to the right of the position. The rail 20D is a linear very short rail, the position on one end side is a position slightly behind the position of the front door and a position slightly on the right side of the rail 20C, and the position on the other end side is the one end side. It is a position slightly ahead of the position. The rail 20E is an L-shaped intermediate length rail, the position on one end side is slightly behind the position on one end side of the rail 20D, and the position on the other end side is the other end side of the rail 20D. This is a position slightly to the right of the position (slightly to the left of the position on the other end side of the rail 20F). The rail 20F is the longest L-shaped rail, the position on one end side is slightly behind the position on one end side of the rail 20E, and the position on the other end side is the other end side of the rail 20E. It is a position on the right side (rightmost) slightly from the position of. In this embodiment, rail 20 (20A ... 20F) is equivalent to a rail indicated in a claim.

  Accordingly, the positions on one end side of the rails 20A, 20B, and 20C are the same in the left-right direction and different in the depth direction. The positions on one end side of the rails 20D, 20E, and 20F are the same in the left-right direction and different in the depth direction. Each position on the other end side of the rails 20A... 20F has the same position in the depth direction (position close to the door on the front surface of the charge / discharge area 2a), and the positions in the left-right direction are different. In addition, although the L-shaped corner | angular part of rail 20B, 20C, 20E, 20F is made into the substantially right angle, it is good also as R shape (arc shape).

  Feeding lines 21 and 21 (21A, 21A... 21F, 21F) are wired along the rail 20 (20A... 20F) in the thermostatic chamber 2. The feeder lines 21 and 21 are a pair of electric wires, and flow currents in opposite directions (the forward and backward paths of the electric wires). The power supply line 21 is obtained by coating a conductive wire such as a copper wire with an insulating material. One end of the feeder lines 21 and 21 is wired to the charging / discharging device 3, and the other end is wired to the position on the other end side of the rail 20. As shown in FIG. 2, the portions of the feeder lines 21 and 21 that are wired along the rail 20 are attached with support members 21 a and 21 a at a predetermined distance from the inner surface of the portion of the rail 20 that extends in the vertical direction. The feeder lines 21 and 21 are attached to the front ends of the support members 21a and 21a, respectively. Therefore, the feeder lines 21 and 21 are arranged in a space portion inside the U-shape of the main body 20a of the rail 20. The portion of the feeder lines 21 and 21 that is wired out of the rail 20 is attached to the ceiling 2b via a support member or the like. A current obtained by superimposing an alternating current for AC impedance measurement on the direct current for charging from the charging / discharging device 3 flows through the power supply lines 21 and 21, and a direct current discharged from the power storage device V flows during the discharging. . Therefore, the feeder 21 becomes a drain for discharging when the power storage device V is discharged. In the present embodiment, the feeder lines 21 and 21 (21A, 21A... 21F, 21F) correspond to the feeder lines described in the claims.

  The thermostat 2 is provided with a cable 22 (22A... 22F) movable along the rail 20 (20A... 20F). The cable 22 has a sufficient length to reach the power storage device V arranged in the lower charge / discharge area 2a from the ceiling 2b. The cable 22 includes a positive cord 23a and a negative cord 23b in a cylindrical member formed of an insulating material. The cable 22 includes a movable portion for moving along the rail 20 at the upper end portion. As shown in FIG. 2, the movable portion is constituted by a guide roller 22a that sandwiches the guide portion 20b of the rail 20 from both sides, and the guide roller 22a is attached to the upper end portion of the cable 22 by a support member 22b. Further, the cable 22 includes a power supply / discharge unit for supplying and discharging power between the cords 23a and 23b and the power supply lines 21 and 21 in a non-contact manner by electromagnetic induction on the side of the upper end. As shown in FIG. 2, this power supply / discharge unit has an E-type ferrite core 22c made of ferrite having an E-shaped cross section, and a coil 22d is formed at the central projecting portion of the E-type ferrite core 22c. The E-type ferrite core 22 c is attached to the side of the upper end of the cable 22. The upper end portion of the cable 22 is formed of a member having strength and hardness so that such a movable portion and a power supply / discharge portion can be attached. In the present embodiment, the cable 22 (22A... 22F) corresponds to the cable described in the claims.

  The cords 23 a and 23 b are cords (electric wires) that connect the power storage device V and the power supply lines 21 and 21. The cords 23a and 23b are obtained by coating conductive wires such as copper wires with an insulating material. The positive cord 23a is connected to the positive terminal Ta of the power storage device V. Negative electrode cord 23b is connected to negative electrode terminal Tb of power storage device V. The cords 23a and 23b are provided with plugs (not shown) for attaching to the terminals Ta and Tb at one end. The other ends of the cords 23a and 23b are connected to the E-type ferrite core 22c. Between the other ends of the cords 23a and 23b and the power supply lines 21 and 21, a non-contact type by electromagnetic induction is performed, and non-contact power feeding is performed during charging, and non-contact discharging is performed during discharging. In the present embodiment, the codes 23a and 23b correspond to the codes described in the claims.

  In this non-contact type power supply, as shown in FIG. 2, an E-type ferrite core 22c has two power supply lines 21 and 21 housed in the two groove portions (ferrite core space), respectively. The coil 22d receives a current flowing through the electric wires 21 and 21. Then, using the electromagnetic induction phenomenon, a current is generated in the coil 22d by the magnetic flux, and the current flows to the cords 23a and 23b via the E-type ferrite core 22c. In this way, non-contact power feeding can be performed. Similarly, non-contact type electric discharge uses an electromagnetic induction phenomenon.

  The charge / discharge device 3 will be described. The charge / discharge device 3 charges / discharges the plurality of power storage devices V ... in the thermostat 2 at a time, and repeats this charge / discharge until the power storage devices V ... are activated. Therefore, the charging / discharging device 3 includes a charging / discharging circuit 30, an alternating current circuit 31, a superimposing circuit 32, a voltage measuring device 33, an impedance measuring device 34, and a control unit 35. The charging / discharging circuit 30, the alternating current circuit 31, the superimposing circuit 32, the voltage measuring device 33, and the impedance measuring device 34 are provided for each power storage device V. In the present embodiment, the charging / discharging circuit 30 corresponds to the charging / discharging circuit described in the claims, and the impedance measuring instrument 34 corresponds to the measuring instrument described in the claims.

  The charging / discharging circuit 30 is a circuit that generates a direct current for charging the power storage device V and receives a current discharged from the power storage device V. When generating a direct current for charging, the charging / discharging circuit 30 first generates a constant direct current to perform constant current charging, and the voltage value of the power storage device V becomes a predetermined voltage value set in advance. A direct current (a gradually decreasing direct current) for performing constant voltage charging is generated. At this time, the voltage value measured by the voltage measuring device 33 is used as the voltage value of the power storage device V. A conventional well-known circuit is applied to the charge / discharge circuit 30. The charge / discharge circuit 30 is connected to the feeder lines 21 and 21 (21A, 21A... 21F, 21F) and to the superimposing circuit 32.

  The alternating current circuit 31 is a circuit capable of generating an alternating current for measuring the alternating current impedance for the power storage device V and changing the frequency of the alternating current. When performing AC impedance measurement, the AC current circuit 31 generates a minute AC current compared to the charging DC current generated by the charge / discharge circuit 30 and changes the frequency of the AC current from a predetermined low frequency to a predetermined high frequency. Increase gradually until the frequency is reached. As the alternating current circuit 31, a conventional known circuit is applied. The alternating current circuit 31 is connected to the superposition circuit 32.

  The superimposing circuit 32 is a circuit that superimposes the alternating current for measuring the alternating current impedance generated in the alternating current circuit 31 on the direct current for charging generated in the charging / discharging circuit 30. A conventional well-known circuit is applied to the superimposing circuit 32. The superimposing circuit 32 is connected to the feeder lines 21 and 21 (21A, 21A... 21F, 21F).

  The voltage measuring device 33 is a measuring device that measures the voltage of the power storage device V. The voltage measuring device 33 is a conventional well-known measuring device. The voltage measuring device 33 is connected to the feeder lines 21 and 21 (21A, 21A... 21F, 21F).

  The impedance measuring instrument 34 is a measuring instrument that measures the impedance of the power storage device V. A conventional well-known measuring instrument is applied to the impedance measuring instrument 34. The impedance measuring device 34 is connected to the feeder lines 21 and 21 (21A, 21A... 21F, 21F).

  The control unit 35 is a control unit of the charging / discharging device 3 and operates the circuits 30, 31, 32 based on the data measured by the measuring devices 33, 34. When charging the power storage device V, the control unit 35 causes the charge / discharge circuit 30 to perform an operation for generating a direct current for charging, and causes the alternating current circuit 31 to generate an alternating current for measuring AC impedance. Then, the superposition circuit 32 is operated to superimpose an alternating current for measuring AC impedance on a direct current for charging. At this time, the control unit 35 determines whether or not the voltage value of the power storage device V measured by the voltage measuring device 33 has reached a predetermined voltage value. An operation for generating a DC current for constant current charging is performed, and after a predetermined voltage value is reached, the charging / discharging circuit 30 is operated for generating a DC current for constant voltage charging. When the power storage device V is discharged, the control unit 35 causes the charge / discharge circuit 30 to perform an operation for receiving power. When determining whether the activation is acceptable or not, the control unit 35 analyzes the change in impedance of the power storage device V measured by the impedance measuring device 34 with respect to the change in frequency of the alternating current generated in the alternating current circuit 31 during charging. (Use Cole-Cole plot). At this time, the control unit 35 observes the reaction resistance (diffusion resistance) state of the power storage device V from the portion where the change in impedance is plotted in an arc shape with respect to the change in frequency in the Cole-Cole plot, and is plotted in an arc shape. When the portion (reaction resistance) becomes smaller than a preset threshold value, it is determined that the activation of power storage device V is completed, and charging / discharging of power storage device V is terminated.

  With reference to FIG.1 and FIG.2, the operation | movement in the charging / discharging system 1 at the time of charging / discharging the six electrical storage apparatuses V in an activation process is demonstrated. An operator opens the door of the thermostat 2 and opens the front of the thermostat 2. And an operator attaches each code | cord | chord 23a, 23b of cable 22 (22A ... 22F) to each terminal Ta, Tb of the electrical storage apparatus V for the electrical storage apparatus V around the front surface of the thermostat 2, and after that, The power storage device V is placed at a predetermined arrangement position in the charge / discharge area 2a. For example, in the case of the power storage device V arranged at the innermost end connected to the cords 23a and 23b of the cable 22C, the worker temporarily places the power storage device V at a position around the front surface of the charge / discharge area 2a of the thermostatic chamber 2. Then, the operator moves the cable 22C along the rail 20C to the vicinity of the front surface of the constant temperature bath 2. Then, the worker attaches the cords 23a and 23b of the cable 22C to the terminals Ta and Tb of the power storage device V around the front surface of the thermostatic chamber 2 (see the state of FIG. 1). Then, the worker holds the power storage device V and moves it to the rear placement position, and places the power storage device V at that position. At this time, the cable 22C is also moved to a position corresponding to the rear arrangement position along the rail 20C. Thus, the worker can work on the power storage device V arranged on the back side in the vicinity of the front surface of the thermostat 2 that is easy to work. Further, when the cable 22 is moved along the rail 20, the cords 23a, 23b and the feeder lines 21, 21 are in contact with each other during the movement because the cords 23a, 23b are not contacted with the feeder lines 21, 21. No wear powder is generated by contact. Therefore, such wear powder does not accumulate between the positive electrode terminal Ta and the negative electrode terminal Tb of the power storage device V to cause a short circuit.

  When the attachment of the cords 23a and 23b to all the power storage devices V is completed and the cords 23a and 23b are placed at the determined arrangement positions in the charge / discharge area 2a, the operator closes the door of the thermostat 2. Then, according to the operation of the operator, the inside of the thermostatic chamber 2 is maintained at a predetermined temperature, and charging / discharging is repeated until activation of all the power storage devices V in the thermostatic bath 2 is completed by the charging / discharging device 3. Done. Since the operation of repeating charge and discharge until this activation is completed is the same as the conventional operation, detailed description thereof is omitted. However, the power supply / discharge between the cords 23a and 23b and the power supply lines 21 and 21 depends on the structure in which the coil 22d receives the current flowing through the power supply lines 21 and 21 arranged in the ferrite core space of the E-type ferrite core 22c. This is done in a non-contact manner by electromagnetic induction. Therefore, unlike the contact type, the contact resistance does not become uneven due to the electric corrosion generated at an arbitrary place. For this reason, even if the distance between the power storage device V and the charge / discharge circuit 30 of the charge / discharge device 3 (the distance through the power supply line 21 and the cords 23a and 23b) changes, data such as the voltage and impedance of the power storage device V is increased. It can be obtained with accuracy.

  When activation is completed for all the power storage devices V and charging / discharging is completed, the operator opens the door in the thermostat and opens the front surface of the thermostat 2. Then, for each power storage device V, the worker moves the power storage device V from the predetermined arrangement position of the charge / discharge area 2a to the periphery of the front surface of the thermostatic chamber 2, and the cable 22 (22A, 22B, 22C, 22D, 22E, 22F). ) Are removed from the terminals Ta and Tb of the power storage device V, and the power storage device V is taken out of the thermostatic chamber 2. For example, in the case of the power storage device V in the innermost arrangement position connected to the cords 23a and 23b of the cable 22C, the operator holds the power storage device V placed in the back and the charge / discharge area 2a of the thermostat 2 Move to the position around the front of the. At this time, the cable 22C is also moved along the rail 20C to a corresponding position around the front surface. The operator removes the cords 23a and 23b of the cable 22C from the terminals Ta and Tb of the power storage device V around the front surface of the thermostat 2. Then, the worker takes the power storage device V and takes it out of the thermostatic chamber 2.

  According to this charging / discharging system 1, by arranging a plurality of rails 20 on the ceiling 2 b of the thermostatic chamber 2 and allowing each cable 22 (each cord 23 a, 23 b) to move along each rail 20, The workability | operativity in the case of charging / discharging the some electrical storage apparatus V arrange | positioned two-dimensionally to the charging / discharging area 2a in the thermostat 2 can be improved. In particular, since each rail 20 is arranged to the periphery of the front surface of the thermostat 2, the work for the power storage device V can be performed around the front surface of the charge / discharge area 2a, and the work for the power storage device V is easy.

  Further, according to the charge / discharge system 1, non-contact type power supply and discharge by electromagnetic induction is performed between the cords 23a and 23b and the feeder lines 21 and 21, so that the cable 22 (codes 23a and 23b) is connected to the rail 20 ( Even if it is moved along the power supply lines 21, 21), no abrasion powder is generated as in the contact type. Therefore, wear powder does not accumulate between the positive electrode terminal Ta and the negative electrode terminal Tb of the power storage device V to cause a short circuit. Further, according to the charging / discharging system 1, non-contact type power supply / discharge is performed between the cords 23, 23b and the power supply lines 21, 21, depending on the position of the cable 22 (codes 23a, 23b) on the rail 20. Even if the distance between the discharge circuit 30 and the power storage device V (distance via the power supply lines 21 and 21 and the cords 23a and 23b) changes, the contact resistance changes due to electrolytic corrosion occurring at an arbitrary location by the contact method. There is no such a situation, and the accuracy of data such as the voltage at the time of charging / discharging the power storage device V does not deteriorate. Therefore, the reliability of the data at the time of charging / discharging of the electrical storage apparatus V can be improved.

  In addition, according to the charge / discharge system 1, by superimposing an alternating current on a charging direct current, a fine alternating current for measuring an alternating current impedance can be caused to flow through the power storage device. Moreover, according to the charge / discharge system 1, since it is possible to obtain highly accurate data as data at the time of charge / discharge of the power storage device V as described above, a minute alternating current is passed for measuring the alternating current impedance, and the alternating current is obtained. When analyzing a change in impedance with respect to a change in current frequency, highly accurate impedance data can be obtained, and the reliability of AC impedance measurement can be improved.

  As mentioned above, although embodiment which concerns on this invention was described, this invention is implemented in various forms, without being limited to the said embodiment.

  For example, in the present embodiment, the charge / discharge system is applied in the battery activation process before shipment, but may be applied to other charge / discharge processes such as aging. In the activation process, an AC current circuit, a superimposition circuit, and an impedance measuring instrument are provided to measure AC impedance, and the AC current for AC impedance measurement is superimposed on the DC current for charging. If not, such a configuration is not necessary.

  In the present embodiment, the movable portion that moves the cable along the rail is a movable portion that is manually moved. However, the movable portion may be configured to be moved electrically by using a motor or the like.

  In the present embodiment, an example of a non-contact type power supply / discharge configuration by electromagnetic induction between the cord and the power supply line is shown. However, a non-contact type power supply (discharge power) between the cord and the power supply line is shown. Any configuration is possible as long as current can be exchanged.

  In the present embodiment, an example of the linear and L-shaped rails 20 (20A... 20F) is shown, but other shapes may be used as the rails. For example, FIG. 3 shows another example of the rail. In the case of the example shown in FIG. 3A, there are five circumferential rails 40 (40A, 40B, 40C, 40D, 40E) having different diameters. In the case of this rail 40, workability with respect to the power storage device is good in the front rail side portion of the circumferential rail, and the power storage device can also be arranged in the back side portion of the constant temperature bath 2 of the circumferential rail. In the case of such a circumferential rail 40, a plurality of (for example, two) cables (cords) may be provided on one rail. In the case of the example shown in FIG. 3B, there are six diagonal rails 50 (50A, 50B, 50C, 50D, 50E, 50F) having different lengths. In the case of this rail 50, workability with respect to the power storage device is good in the front side portion of the thermostat 2 in the oblique rail, and the power storage device can be arranged in the back portion of the thermostat 2 in the oblique rail. Note that the shortest rails 20A and 20D according to the present embodiment may not be provided (there is no movable part of the cables 22A and 22D), and the cables 22A and 22D may be attached to the ceiling.

  DESCRIPTION OF SYMBOLS 1 ... Charging / discharging system, 2 ... Constant temperature bath, 2a ... Charging / discharging area, 2b ... Ceiling, 20 (20A, 20B, 20C, 20D, 20E, 20F), 40 (40A, 40B, 40C, 40D, 40E), 50 (50A, 50B, 50C, 50D, 50E, 50F) ... rail, 20a ... main body, 20b ... guide part, 21 (21A, 20B, 21C, 21D, 21E, 21F) ... feed line, 21a ... support member, 22 ( 22A, 22B, 22C, 22D, 22E, 22F) ... cable, 22a ... guide roller, 22b ... support member, 22c ... E type ferrite core, 22d ... coil, 23a ... cord for positive electrode, 23b ... cord for negative electrode, 3 ... Charge / discharge device, 30 ... charge / discharge circuit, 31 ... AC current circuit, 32 ... superimposed circuit, 33 ... voltage measuring instrument, 34 ... impedance measuring instrument, 35 ... control .

Claims (2)

A charge / discharge system for charging / discharging a plurality of power storage devices,
A tank having a charge / discharge area, wherein the plurality of power storage devices are placed in the charge / discharge area;
A plurality of rails disposed above the charge / discharge area;
A plurality of feeders connected to the charge / discharge circuit and wired along the rail; and
A plurality of cables including a cord that is movable along the rail and connects the power supply line and the power storage device;
With
Between the feed line and the code, Ri feed der contactless,
The tank can be opened only on one side,
Each position on one end side of the plurality of rails has the same position in the left-right direction and a different position in the depth direction when viewed from the one surface side, and each position on the other end side of the plurality of rails has a depth when viewed from the one surface side. A charge / discharge system with the same position in the direction but different positions in the left-right direction . A charge / discharge system for charging / discharging a plurality of power storage devices,
A plurality of rails disposed above the charge / discharge area;
A plurality of feeders connected to the charge / discharge circuit and wired along the rail; and
A plurality of cables including a cord that is movable along the rail and connects the power supply line and the power storage device;
With
Between the cord and the feed line is a non-contact type feed,
The plurality of rails are charge / discharge systems, which are circumferential rails having different diameters.

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