JP5870666B2 - Battery module - Google Patents

Description

  The present invention relates to a battery module.

  A plurality of batteries and a plurality of memories provided corresponding to each of the plurality of batteries and recording deterioration information of each of the plurality of batteries are provided, and the battery shields the pair of electrodes and the pair of electrodes from the outside. A battery pack including an exterior part and having the memory provided inside the exterior part is known (Patent Document 1).

JP 2010-232103 A

  However, in the above battery pack, the specific structure of the memory and the battery is not disclosed, and when the memory is taken out from the battery pack and replaced with another memory and illegally distributed as a reused battery pack However, there is a problem in that the reliability of a legitimate reused product is lowered because an illegally reused battery becomes usable.

  The problem to be solved by the present invention is to provide a battery module that improves the reliability as a reusable product.

  The present invention includes a detection unit that detects unauthorized use of a battery module, and a battery information management unit that, when detected by the detection unit, prevents battery information from being taken out of the battery module. Solve the above problems.

  According to the present invention, when unauthorized use of a battery module is detected, the information of the single cell managed by the battery information management unit cannot be output to the outside, so that the reuse of the battery module related to unauthorized use is suppressed. As a result, the reliability of the reused battery module can be improved.

It is a block diagram of the battery module which concerns on embodiment of this invention. It is a top view of the cell which comprises the battery module of FIG. It is a perspective view of the battery structure which laminated | stacked the cell of FIG. It is a disassembled perspective view of the battery module of FIG. It is a perspective view of the battery module of FIG. 4, and a cover body. It is a fragmentary sectional view which follows the VI line of FIG. It is a fragmentary sectional view of the battery module concerning other embodiments of the present invention. It is a fragmentary sectional view of the battery module concerning other embodiments of the present invention.

    Hereinafter, embodiments of the invention will be described with reference to the drawings.

<< First Embodiment >>
The battery module 1 according to the embodiment of the present invention includes a single battery 301 and a cell controller (ADC: Autonomous Decentralized Cell Controller) 400. The unit cell 301 is composed of a primary battery or a secondary battery. The cell controller 400 includes a detection unit 401, a voltage measurement unit 402, a capacity adjustment unit 403, a power supply circuit 404, a communication unit 405, a control unit 406, a volatile recording unit 407, and a nonvolatile recording unit 408. And is housed in a lid 40 to be described later, and is composed of electronic components.

  First, the structure of the unit cell 301 and the lid 40 will be described with reference to FIGS. Of the unit cells 301 of the battery module 1 of this example, a flat unit cell 101 will be described with reference to FIG. FIG. 2 is a plan view of the unit cell 101. The unit cell 101 is a lithium ion-based, flat plate, laminate type secondary battery (thin battery), a positive electrode plate, a separator, a negative electrode plate, a positive electrode terminal 111 (positive electrode terminal), and a negative electrode terminal. 112 (negative electrode terminal), an upper exterior member 113, a lower exterior member 114, and an electrolyte (not shown). Each of the positive electrode plate, the separator, and the negative electrode plate is not limited to one sheet, and may be composed of a plurality of sheets.

  The positive electrode plate, the separator, the negative electrode plate, and the electrolyte constitute the power generation element 115, the positive electrode plate and the negative electrode plate constitute the electrode plate, and the upper exterior member 113 and the lower exterior member 114 constitute a pair of exterior members.

  The positive electrode plate constituting the power generation element 115 includes a positive electrode side current collector extending to the positive electrode terminal 111 and positive electrode layers respectively formed on both main surfaces of a part of the positive electrode side current collector. The positive electrode layer of the positive electrode plate is not formed over both main surfaces of the positive electrode side current collector, but when the power generation element 115 is configured by stacking the positive electrode plate, the separator, and the negative electrode plate. The positive electrode layer is formed only on the portion of the positive electrode plate that substantially overlaps the separator.

The positive electrode side current collector of the positive electrode plate is made of an electrochemically stable metal foil such as an aluminum foil, an aluminum alloy foil, a copper foil, or a nickel foil. In addition, the positive electrode layer of the positive electrode plate is made of, for example, lithium composite oxide such as lithium nickelate (LiNiO ₂ ), lithium manganate (LiMnO ₂ ), or lithium cobaltate (LiCoO ₂ ), chalcogen (S, Se, Te) A mixture of a positive electrode active material such as a compound, a conductive agent such as carbon black, an adhesive such as an aqueous dispersion of polytetrafluoroethylene, and a solvent, It is formed by applying to both main surfaces, drying and rolling.

  The negative electrode plate constituting the power generation element 115 includes a negative electrode side current collector extending to the negative electrode terminal 112 and negative electrode layers respectively formed on both main surfaces of part of the negative electrode side current collector. The negative electrode layer of the negative electrode plate is not formed over both main surfaces of the negative electrode side current collector, but when the power generating element 115 is formed, the negative electrode plate substantially overlaps the separator. Only the negative electrode layer is formed.

  The negative electrode side current collector of the negative electrode plate is made of an electrochemically stable metal foil such as nickel foil, copper foil, stainless steel foil, or iron foil. In addition, the negative electrode layer of the negative electrode plate is, for example, a negative electrode active material that occludes and releases lithium ions of the positive electrode active material, such as amorphous carbon, non-graphitizable carbon, graphitizable carbon, or graphite. Mixing an aqueous dispersion of styrene butadiene rubber resin powder as a precursor material of an organic fired body, drying and then pulverizing, the carbon material surface carrying carbonized styrene butadiene rubber as the main material, This is formed by further mixing a binder such as an acrylic resin emulsion, applying the mixture to both main surfaces of a part of the negative electrode side current collector, and drying and rolling.

  In particular, when amorphous carbon or non-graphitizable carbon is used as the negative electrode active material, the flatness of the potential during charge / discharge is poor and the output voltage decreases with the amount of discharge. Although unsuitable, it is advantageous when used as a power source for an electric vehicle because there is no sudden drop in output.

  The separator of the power generation element 115 prevents a short circuit between the positive electrode plate and the negative electrode plate described above, and may have a function of holding an electrolyte. This separator is a microporous membrane made of polyolefin such as polyethylene (PE) or polypropylene (PP), for example, and when overcurrent flows, the pores of the layer are blocked by the heat generation, thereby blocking the current It also has. The separator according to this example is not limited to a single-layer film such as polyolefin, but a three-layer structure in which a polypropylene film is sandwiched with a polyethylene film, or a laminate of a polyolefin microporous film and an organic nonwoven fabric can also be used. .

  The power generation element 115 described above is formed by laminating a positive electrode plate and a negative electrode plate via a separator. The positive electrode plate is connected to the positive electrode terminal 111 made of metal foil via the positive electrode side current collector, while the negative electrode plate is similarly connected to the negative electrode made of metal foil via the negative electrode side current collector. Each is connected to a terminal 112.

  The positive electrode terminal 111 and the negative electrode terminal 112 are not particularly limited as long as they are electrochemically stable metal materials. As the positive electrode terminal 111, an aluminum foil, an aluminum alloy foil, A copper foil, nickel foil, etc. can be mentioned. Moreover, as the negative electrode terminal 112, nickel foil, copper foil, stainless steel foil, iron foil, etc. can be mentioned similarly to the above-mentioned negative electrode side collector, for example.

  The power generation element 115 described above is housed and sealed in the upper exterior member 113 and the lower exterior member 114. Although not particularly illustrated, the upper exterior member 113 and the lower exterior member 114 of this example are both resistant from the inner side to the outer side of the unit cell 101, such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer. An inner layer composed of a resin film excellent in electrolytic properties and heat-fusibility, an intermediate layer composed of a metal foil such as aluminum, and an electrical insulating property such as a polyamide resin or a polyester resin And an outer layer made of an excellent resin film.

  Therefore, both the upper exterior member 113 and the lower exterior member 114 are made of a resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer on one surface (inner surface of the flat battery) of a metal foil such as an aluminum foil. It is made of a flexible material such as a resin-metal thin film laminate material obtained by laminating and laminating the other surface (the outer surface of the flat battery) with a polyamide resin or a polyester resin.

  These exterior members 113 and 114 enclose the above-described power generation element 115, part of the electrode terminal 111 and part of the electrode terminal 112, and in the internal space formed by the exterior members 113 and 114, an organic liquid solvent is added. While injecting a liquid electrolyte having a lithium salt such as lithium chlorate, lithium borofluoride or lithium hexafluorophosphate as a solute, the space formed by the exterior members 113 and 114 is sucked into a vacuum state, and then the exterior The outer peripheral edges of the members 113 and 114 are heat-sealed by hot pressing and sealed.

  Next, a battery structure in which the unit cells 101 of FIG. 1 are stacked will be described with reference to FIG. FIG. 3 is a perspective view of the unit cell 101 and the unit cell 201.

  The unit cell 101 shown in FIG. 3 has a plate-like electrode terminal 111 at the end, and a plate-like electrode terminal 112 is provided at the opposite end of the electrode terminal 111 toward the outside of the battery. ing. The electrode terminal 111 has an anode polarity, and the electrode terminal 112 has a cathode polarity. The electrode terminals 111 and 112 in FIG. 3 may be formed by processing the tip portions of the electrode terminals 111 and 112 in FIG. 2, and separate electrodes are connected to the electrode terminals 111 and 112 in FIG. 2. You may form by.

  The spacer 121 and the spacer 122 sandwich the electrode terminal 111, and the spacer 123 and the spacer 124 sandwich the electrode terminal 112. The spacer has an insulating property and maintains the insulating property between the single electrode 101 and the unit cell 201 to be stacked. The output terminal 131 is electrically connected to the electrode terminal 111 and becomes the output terminal 131 of the battery module shown in FIG.

The unit cell 201 is stacked from the upper surface of the unit cell 101. The spacer 221 is a spacer that holds the electrode terminal 211 of the unit cell 201 from above and below, and indicates a lower spacer. The spacer 223 is a spacer that holds the electrode terminal 212 of the unit cell 201 from above and below, and similarly shows a lower spacer. The electrode terminal 211 has a cathode polarity, and the electrode terminal 212 has an anode polarity. When the unit cell 101 and the unit cell 201 are stacked, the electrode terminal 111 and the electrode terminal 211 are electrically connected. Thereby, the unit cell 101 and the unit cell 201 are connected in series and stacked. Therefore, a gap is provided in the stacking direction of the unit cells 101 and 201 in the portion where the spacers 122 and 221 are provided.

  FIG. 3 shows only the state in which the two unit cells 101 and 201 are stacked, but when stacking three or more unit cells, another unit cell is stacked from the upper surface of the unit cell, The electrode terminal of the positive electrode of another unit cell is connected to the electrode terminal 212. Thereby, three unit cells are stacked in series connection.

FIG. 4 is an exploded perspective view showing the battery module 1 according to the present embodiment. FIG. 5 is a perspective view of the battery module 1 and the lid body 40. A single cell 301 of the battery module 1 is formed by stacking a plurality of single cells 101 and 201 shown in FIG.

  One end of the unit cell 301 is connected to output terminals 131 and 132 of the anode and the cathode, respectively. The insulating cover 302 is attached to the end face side of the unit cell 301 to which the output terminals 131 and 132 are connected, covers the electrode terminal, and maintains insulation between the electrode terminal and the outside of the unit cell. Similarly, the insulating cover 303 is attached to the side opposite to the connection surface of the output terminals 131 and 132. The spacers 304 and 305 are formed by stacking the spacers 121 to 124 of FIG. 2 and are arranged between the single cells 301 to fix the single cells 301 at predetermined positions.

The case 360 includes an upper case 361 and a lower case 362. As shown in the drawing, an assembly such as the unit cell 301 is placed in the lower case 362, and the opening of the upper case 361 and the lower case 362 are crimped to form the unit cell 301. And spacers 304, 5 and the like are accommodated. Case 360 is formed of a thin steel plate.

The insertion port 307 is provided in the central portion of the insulating cover 302 and is fitted to the lid 40 described later. When the lid 40 is fitted into the insertion port 307, the unit cell 301 and the cell controller 400 accommodated in the lid 40 are electrically connected.

  Next, using FIG. 5 and FIG. 6, a joint portion between the insertion port 307 and the lid body 40 in the battery module 1 will be described. 6 is a partial cross-sectional view taken along line VI of FIG.

  The insulating cover 302 has an insertion port 307 formed therein. The insertion port 307 is formed to match the shape of the main body 42. A recess 302 a is formed on the upper surface of the insertion port 307 so as to be recessed from the surface toward the inside of the insulating cover 302 above the insertion port 307. When the lid body 40 is inserted into the insertion port 307, the recess 302a faces the recess 421a.

  The lid body 40 has a plate-like plate portion 41 and a columnar main body portion 42 along the side surface of the battery module 1. The main body 42 is formed in a rectangular parallelepiped shape, and includes four surfaces including an upper surface 421 and a lower surface 422. The main body portion 42 extends from the flat portion of the plate portion 41 toward the power generation element 115. The plate part 41 and the main body part 42 are integrally formed, for example, formed of resin or the like. The lid body 40 is a housing body that houses the cell controller 400 for managing the state of the unit cell 301. The electronic components inside the main body 42 are mounted on a substrate (not shown), and the substrate is provided along the inner wall surface of the main body 42.

  The lid 40 and the unit cell 301 are connected by a wiring 43. In FIG. 6, the connecting portion between the lid body 40 and the unit cell 301 by the wiring 43 is omitted. For example, a connector pin (corresponding to the wiring 43) that is electrically connected to the electronic component of the main body 42 is covered. The spacer 304 is provided with a connector which is provided on the body 40 and is electrically connected to a terminal of the unit cell 301 and serves as a connector pin insertion hole. Then, when the lid 40 is fitted into the insertion port 307, the connector pin and the connector are connected, whereby the unit cell 301 and the cell controller 400 are electrically connected.

  A recess 421a is formed on the upper surface 421, and a detection unit 401 is provided in the recess 421a. The detection unit 401 includes a limit switch 401 a for detecting unauthorized use of the battery module 1. The limit switch 401 a is a switch that is driven by inserting the lid 40 including the cell controller 404 into the insertion port 307 and removing the lid 40 from the insertion port 307. The detection unit 401 is provided in the recess 421a so that the upper part of the limit switch 401a protrudes from the upper surface 421. When the lid body 40 is inserted into the insertion port 307, the upper portion of the limit switch 401 a is pressed by the upper surface of the insertion port 307 at the entrance portion of the insertion port 307. When the lid 40 is completely inserted into the insertion port 307, the upper portion of the pressed limit switch 401a returns to the original position by the recess 302a. Thereby, when the lid 40 is inserted, the limit switch 401a is pushed.

  When the lid 40 is to be taken out from the insertion port 307, the upper portion of the limit switch 401a is pressed at a portion between the recess 421a and the upper surface of the insertion port 307. When the lid 40 is completely removed from the insertion port 307, the upper part of the pressed limit switch 401a returns to the original position. Accordingly, when the lid 40 is removed from the insertion port 307, the limit switch 401a is pressed. That is, the detection unit 401 serves as a sensor that detects insertion and removal of the lid 40 from the insertion port 307.

  Returning to FIG. 1, the structure other than the unit cell 301 and the lid 40 will be described. The detection unit 401 is a detection unit that detects unauthorized use of the battery module 1, detects the unauthorized use based on switching of the limit switch 401 a on and off, and transmits a signal indicating the detection result to the control unit 406. To do. The detection control of unauthorized use by the detection unit 401 will be described later.

  The voltage measuring unit 402 is a sensor that is connected between the terminals of the batteries included in the unit cell 301 and detects the voltage of each unit cell 301. In addition, the voltage measurement unit 402 transmits the detection voltage to the control unit 406. The capacity adjustment unit 403 is a circuit that adjusts the capacity of each unit cell 301 and includes a discharge resistor and a switch for discharging. Based on the control signal from the control unit 406, the capacity adjustment unit 403 turns on the switch to conduct between the unit cell 301 and the discharge resistor, and discharges the unit cell 301. Adjust the capacity. The power supply circuit 404 is an adjustment circuit for using the unit cell 301 as a driving power source for the cell controller 400, and converts the power from the unit cell 301 into power suitable for each control part and supplies it. The power supply circuit 404 is connected between the unit cell 301 and the communication unit 405, the control unit 406, the volatile storage unit 407, and the nonvolatile storage unit 406.

  The communication unit 405 is a communication device that performs wireless or wired communication with the outside of the battery module 1. Based on the control signal of the control unit 406, the communication unit 405 transmits information managed by the control unit 406 or information recorded in the information recording units 407 and 408 to the outside, receives information from the outside, and receives the information from the outside. To 406 etc.

  The control unit 406 controls the detection unit 401, the capacity adjustment unit 403, the communication unit 405, and the recording units 407 and 408. In addition, when the detection unit 401 detects unauthorized use, the control unit 406 controls the battery information of the single battery 301 managed by the cell controller 400 so that it cannot be taken out of the battery module 1. Note that control of the control unit 406 when unauthorized use is detected will be described later.

  Based on the control of the control unit 406, the volatile recording unit 407, for example, as the information related to the unit cell 301, for example, the usage history or full charge capacity of the unit cell 301, or identification information (ID) registered in advance for each battery module 1 ) Etc. are recorded. The volatile recording unit 407 holds recording information when receiving power supply from the power supply circuit 404. When the lid 40 is completely inserted into the insertion port 307, the power of the unit cell 301 is supplied to the volatile recording unit 407 via the power supply circuit 404, and the lid 40 is inserted. As long as it is not taken out from the inlet 307, the said electric power supply state is continued. On the other hand, when the lid 40 is taken out from the insertion port 307, it is electrically disconnected between the unit cell 301 and the cell controller 400, so that the electric power of the unit cell 301 is transferred to the volatile recording unit 407. The power supply stops and the recorded information in the volatile recording unit 407 disappears.

  The non-volatile recording unit 408 is a memory that can hold recording information even when power from the single battery 301 is not supplied. Information recorded in the volatile storage unit 407 may be stored in the nonvolatile storage unit 408, and information recorded in the volatile storage unit 408 may be stored in the nonvolatile storage unit 407.

  Next, control of the cell controller 400 will be described. First, capacity adjustment control of the unit cell 301 will be described.

  The control unit 406 manages the voltage of each unit cell 301 based on the detection voltage of the voltage measurement unit 402. When the voltage of each unit cell 301 varies, the control unit 406 turns on the switch of the capacity adjustment unit 403 connected to the unit cell 301 having a higher voltage among the unit cells 301. Discharge. And the variation is suppressed by adjusting so that the voltage of the unit cell 301 as a reference for capacity adjustment becomes the voltage of another unit cell 301 or a predetermined adjustment voltage. Note that the control unit 406 may adjust the capacity of the unit cell 301 by controlling charging of the unit cell 301.

  Next, battery information of the single battery 301 managed by the cell controller 400 will be described. The control unit 406 manages the state of charge (SOC) of the unit cell 301 from the voltage of the voltage measurement unit 402, and manages the deterioration information of the unit cell 301 from the SOC. In addition, the control unit 406 may manage the deterioration information of the single battery 301 from the driving time of the cell controller 400 or the like.

  The unit cell 301 deteriorates with the progress of use, and the maximum capacity of the unit cell 301 decreases. Assuming a case where the battery module 1 is taken out from the power storage system of the vehicle or house in which the battery module 1 of this example is mounted and reused for another vehicle or the like, the market value of the battery distributed for reuse is For example, it depends on the degree of deterioration of the unit cell 301. Therefore, the cell controller 400 manages the deterioration information of the single battery 301 as the battery information of the single battery 301.

  Further, in the case of reusing the battery module 1 as described above, identification information is given in advance for each battery module in order to ensure the reliability of the battery module 1. The identification information is information for assuring the identity between the unit cell 301 and the cell controller 400 and is recorded in the volatile recording unit 407 as described above. For example, when the lid 40 provided with the cell controller 400 is removed from one unit cell 301 and inserted into the insertion port 307 of another unit cell 301, when the lid unit 40 is removed from the unit cell 301, Since the identification information of the volatile recording unit 407 is deleted, even if the lid 40 is inserted into another unit cell 301, there is no identification information. Thereby, the present example ensures the reliability of the battery module 1 from the identification information. The cell controller 400 manages the identification information of the battery module 1 as the battery information of the single battery 301.

  Next, detection control of unauthorized use of the detection unit 401 and control related to battery information when unauthorized use is detected will be described. As described above, the detection unit 401 detects the insertion of the lid 40 into the insertion port 307 and the removal of the lid 40 from the insertion port 307 by the limit switch 401a. In a state where the unit cell 301 is new and the lid 40 is not inserted into the insertion port 307, the limit switch 401a has not been pressed once, so the start counter of the limit switch 401a becomes zero. When the lid 40 is inserted into the insertion port 307 for shipping the battery module 1, the limit switch 401a is pushed, and the activation counter of the limit switch 401a becomes “1”. Thereafter, unless the lid 40 is taken out from the insertion port 307, the activation counter of the limit switch 401a maintains the state of “1”.

  On the other hand, when the lid 40 is removed from the insertion port 307 due to unauthorized use of the battery module 1, the limit switch 401a is pushed, so the activation counter of the limit switch 401a is “2”. The detection unit 401 holds the value of the activation counter, and when the value of the drive counter is larger than 1, the detection unit 401 detects that the battery module 1 has been illegally used, and sends a signal indicating unauthorized use to the control unit 406. Send. As a result, the detection unit 401 detects unauthorized use of the battery module 1.

  Here, unauthorized use of the battery module 1 will be described. The unauthorized use of the battery module 1 is, for example, a case where the cell controller 400 in the battery module 1 is taken out and the deterioration information recorded by the cell controller 400 is rewritten or the identification information is changed. Alternatively, if a history of unauthorized use remains in the recorded information of the cell controller 400, tampering with the history itself corresponds to unauthorized use. When such unauthorized use is made, for example, the battery module 1 provided with the originally deteriorated unit cell 301 is distributed to the market as a reusable battery module 1 with a low degree of deterioration. May be used. Therefore, in this example, unauthorized use of the battery module 1 is suppressed by performing the following control.

  When the detection unit 401 detects unauthorized use of the battery module 1, the control unit 406 stops the communication function of the communication unit 405 so that information in the cell controller 400 cannot be transmitted from the communication unit 405. Is in a state where it cannot be taken out of the battery module 1.

  When the detection unit 401 detects unauthorized use of the battery module 1, the control unit 406 deletes the battery information of the battery module 1 recorded in the nonvolatile recording unit 407 and the volatile storage unit 408, thereby It is assumed that information cannot be taken out of the battery module 1.

  As a result, when unauthorized use of the battery module 1 is detected, battery information cannot be output outside the cell controller 400. Therefore, even if the cell controller 400 is mounted on a single battery 301 different from that at the time of shipment. The battery information cannot be transmitted / received between the main controller that manages the battery module 1 and the illegally used battery module 1.

  Further, in a power storage device or power storage system in which the genuine battery module 1 and the unauthorized battery module 1 are mounted, battery information can be transmitted and received between the genuine battery module 1 and the main controller. Since it is possible to prevent battery information from being transmitted and received between the battery module 1 and the main controller, only the genuine battery module 1 can be used without completely stopping the apparatus or system itself. Can be driven. In particular, when the battery module 1 of this example is reused in a stationary power supply system, the genuine battery module 1 is used to perform the function as a power supply, and the unauthorized battery module 1 is replaced. Can be controlled.

  As described above, in this example, when the detection unit 401 detects unauthorized use of the battery module 1, the battery information cannot be output to the outside of the battery module 1. Thereby, when the unauthorized use of the battery module 1 is detected, the information of the single battery 301 managed by the cell controller 400 cannot be output to the outside, so that the reuse of the battery module 1 related to the unauthorized use is suppressed. In addition, the reliability of the reused battery module can be improved.

  Also, in this example, when the unauthorized use of the battery module 1 is detected by the detection unit 401, the communication function by the communication unit 405 is stopped so that the battery information cannot be output to the outside of the battery module 1. Thereby, when the unauthorized use of the battery module 1 is detected, the information of the single battery 301 managed by the cell controller 400 is not transmitted from the communication unit 405, so that the reuse of the battery module 1 related to unauthorized use is prevented. It is restrained and the reliability of the reused battery module can be increased.

Further, in this example, when the detection unit 401 detects unauthorized use of the battery module 1, the information recorded in the volatile recording unit 407 and the non-volatile recording unit 408 is deleted, so that the battery information is stored in the battery module. 1 so that it cannot be put out. Thereby, when unauthorized use of the battery module 1 is detected, the battery information recorded in the volatile recording unit 407 and the non-volatile recording unit 408 is erased, and the information indicating the reliability of the battery is erased. Even if the illegally used battery module 1 is distributed in the market as a reused product, the battery module 1 can be identified as a battery related to unauthorized use. As a result, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be improved.

  In this example, the detection unit 401 includes a limit switch 401a, and detects unauthorized use from the number of times the limit switch 401a is driven. Thereby, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be increased.

  In this example, the limit switch 401a is provided in the detection unit 401 to provide an unauthorized use detection function. However, when the cell controller 400 is turned off, it is detected that the unauthorized use has occurred. You may make it the state which cannot take out battery information outside the battery module 1 by deleting the recording information of the volatile recording part 407. FIG. As described above, the cell controller 400 uses the unit cell 301 as a driving power source. When the lid 40 is taken out from the insertion port 307, the power source circuit 404 and the unit cell 301 are electrically disconnected. The drive power supply of the controller 400 is turned off. Since the power supply to the volatile recording unit 407 is also cut off, the recorded information in the volatile recording unit 407 is erased. That is, if the lid 40 is taken out from the insertion port 307 for unauthorized use, the power supply circuit 404 is turned off to detect unauthorized use, and the recorded information in the volatile recording unit 407 is erased. Thus, the battery information cannot be output to the outside of the battery module 1. Thereby, in this example, unauthorized reuse of the battery module 1 can be suppressed, and the reliability of the reused product of the battery module 1 can be improved.

  In this example, the battery information may be recorded in the non-volatile recording unit 408. When unauthorized use is detected by the detection unit 401, the battery information in the non-volatile recording unit 408 is erased. You may make it the state which cannot take out to the exterior of the battery module 1. FIG. That is, by erasing the battery information recorded in the non-volatile recording unit 408, even if the lid 40 having the cell controller 400 is taken out, the battery information is not used illegally. Further, even if the lid 40 having the cell controller 400 is inserted into the insertion port 307 of another unit cell 301, the battery module 1 is not genuine because the identification information included in the battery information is erased. Therefore, unauthorized reuse of the battery module 1 is suppressed.

  Also, in this example, when the detection unit 401 detects unauthorized use, the information in the nonvolatile recording unit 408 is erased. However, when information indicating unauthorized use is recorded in the nonvolatile recording unit 408, the information Does not have to be deleted. As a result, when unauthorized use information is recorded in the non-volatile recording unit 408, even if the lid 40 is removed from the insertion port 307, the unauthorized use information remains in the cell controller 400, Even if the battery module 1 related to use is distributed in the market, the battery module 1 can be identified as a battery related to unauthorized use. As a result, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be improved.

  In this example, the detection unit 401 does not necessarily have the limit switch 401a. For example, at least one of a strain sensor, a capacitance sensor, an impedance sensor, a magnetic sensor, an acceleration sensor, a current sensor, and a pressure sensor is used. You may have. And the detection part 401 may compare the detection value of these sensors with the preset threshold value for determining unauthorized use, and may detect unauthorized use based on a comparison result. Thereby, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be increased.

  The cell controller 400 corresponds to the “battery information management unit” of the present invention.

<< Second Embodiment >>
FIG. 7 is a partial cross-sectional view of a battery module 1 according to another embodiment of the invention, and is a cross-sectional view corresponding to FIG. In this example, the configuration of the detection unit 401 is different from the first embodiment described above. Since the configuration other than this is the same as that of the first embodiment described above, the description of the first embodiment is incorporated as appropriate.

  The detection unit 401 includes an optical measurement unit 401b and is provided in the recess 421a as shown in FIG. The recess 302a as in the first embodiment is not formed in the insulating cover 302 of this example. The optical measurement unit 401b is a sensor that detects light. In a state where the lid 40 is inserted into the insertion port 307, the optical measurement unit 401b is covered with the insulating cover 302, so that light from the outside does not enter the optical measurement unit 401b.

  The detection unit 401 detects unauthorized use of the battery module 1 based on whether light is detected by the light measurement unit 401b. When the battery module 1 is shipped in a state where the lid 40 is inserted into the insertion port 307, the detection unit 401b does not detect light unless the lid 40 is removed from the insertion port 307. On the other hand, when the lid 40 is removed from the insertion port 307 for the purpose of unauthorized use, light from the outside enters the light measurement unit 401b, and thus the light measurement unit 401b detects light. If the light measurement unit 401b detects light after the battery module 1 is shipped, the detection unit 401 determines that the lid 40 has been removed from the insertion port 307, detects unauthorized use of the battery module 1, A control signal is transmitted to the control unit 406.

  As described above, the detection unit 401 includes the optical measurement unit 401b. Thereby, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be increased.

  The optical measuring unit 401b corresponds to the “optical sensor” of the present invention.

<< Third Embodiment >>
FIG. 8 is a partial cross-sectional view of a battery module 1 according to another embodiment of the invention, and is a cross-sectional view corresponding to FIG. In this example, the configuration of the detection unit 401 is different from the first embodiment described above. Since the configuration other than this is the same as that of the first embodiment described above, the description of the first embodiment is incorporated as appropriate.

  The detection unit 401 includes a temperature sensor 401c. As shown in FIG. 8, recesses are formed on the upper surface 421 and the lower surface 422. Further, a concave portion is also formed on the surface of the lid 40 facing the outside of the battery module 1. A plurality of temperature sensors 401c are provided in the plurality of recesses, respectively.

  The temperature sensor 401c is a sensor that detects the temperature applied to the cell controller 400 or a member around the cell controller 400 (such as the insulating cover 302) that constitutes the battery module 1. When removing the cell controller 400 from the battery module 1 for the purpose of unauthorized use, it is assumed that the lid 40 or the periphery of the lid 40 is heated by a soldering iron or a dryer.

  The detection unit 401 compares the temperature detected by the temperature sensor 401c with a preset temperature threshold value for determining unauthorized use. When the detected temperature is higher than the temperature range value, to decide. When the lid 40 or the periphery of the lid 40 is heated with a soldering iron or the like, the temperature sensor 401c detects a temperature rise due to the heating, and the detection unit 401 detects that the temperature detected by the temperature sensor 401c is higher than the temperature range value. In this case, it is detected that the battery module 1 has been illegally used, and a signal is transmitted to the control unit 406.

  As described above, the detection unit 401 includes the temperature sensor 401. Thereby, the reuse of the battery module 1 related to unauthorized use is suppressed, and the reliability of the reused battery module can be increased.

DESCRIPTION OF SYMBOLS 1 ... Battery module 101, 201, 301 ... Single cell 111, 112, 211, 212, 311, 312 ... Electrode terminal 113 ... Upper exterior member 114 ... Lower exterior member 115 ... Electric power generation element 120-124, 221, 223 ... Spacer 131 132 ... Output terminals 302, 303 ... Insulating cover 302a ... Recess 304, 305 ... Spacer 307 ... Insert 360 ... Case 361 ... Upper case 362 ... Lower case 40 ... Lid 41 ... Plate part 42 ... Main body part 421 ... Upper surface 421a ... concave part 422 ... lower surface 422a ... concave part 400 ... cell controller 401 ... detection part 401a ... limit switch 401b ... optical measurement part 401c ... temperature sensor 402 ... voltage measurement part 403 ... capacity adjustment part 404 ... power supply circuit 405 ... communication part 406 ... control Part 407 ... volatile recording part 408 ... non-volatile Sex storage unit

Claims (4)

In a battery module including a unit cell for sealing a power generation element including an electrolyte inside an exterior member,
A battery information management unit for managing battery information related to the unit cell;
A detection unit for detecting unauthorized use of the battery module;
Provided with an insertion port into which the battery information management unit is inserted ,
The battery information management unit
When the unauthorized use is detected by the detection unit, the battery information cannot be taken out of the battery module ,
The detector is
Inserting into the insertion port of the battery information management unit, and having a switch that is driven by removal from the insertion port of the battery information management unit,
The battery module, wherein the unauthorized use is detected from the number of times the switch is driven . The battery information management unit
A communication unit for transmitting the battery information to the outside;
2. The battery module according to claim 1, wherein when the unauthorized use is detected by the detection unit, the state is established by stopping a communication function of the communication unit. The battery information management unit
A recording unit for recording the battery information;
2. The battery module according to claim 1, wherein when the unauthorized use is detected by the detection unit, the state is obtained by erasing information recorded in the recording unit. The battery information management unit
A recording unit for recording the battery information;
2. The battery module according to claim 1, wherein when the unauthorized use is detected by the detection unit, information indicating that the unauthorized use has occurred is recorded in the recording unit.

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