JP5104191B2 - battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery for allowing a driver to manually drive a vehicle that is not equipped with an ISS (idling stop/start) system in the ISS mode more safely. <P>SOLUTION: A lead battery 10 has a battery condition detection unit 3 on an upper lid 1 thereof. The detection unit 3 has a current sensor 2 for measuring current flowing through the lead battery 10 to estimate the charging condition and deteriorating condition of the lead battery 10 from the current flowing through the lead battery 10 and the voltage of the lead battery 10. Based on the estimated charging condition and deteriorating condition, the detection unit 3 determines whether the vehicle can start the engine and whether the battery has to be replaced. The current sensor 2, a voltage measurement line for measuring voltage, and the detection unit 3 are disposed on the upper lid 1 of the lead battery 10. The detection unit 3 is connected to an informing unit 4 for informing a driver of the estimation or determination result via a wired line. The informing unit 4 is disposed proximate to a driver's seat. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a battery, and more particularly to a vehicle battery provided with a battery state detection device for detecting the state of the battery.

  2. Description of the Related Art In recent years, an idle stop / start (hereinafter referred to as ISS) system has attracted attention in order to reduce exhaust gas from an engine vehicle (vehicle) and improve fuel efficiency, and a technique for determining a state where idling can be stopped is desired. Lead batteries are typical batteries that can be used for this type of application. The state of charge of the lead battery can be determined, for example, by measuring the amount of charge / discharge electricity flowing in the lead battery (see Patent Document 1). Moreover, the health state of a lead battery can obtain | require a health state from an electric current, an electric current, and a voltage, for example (refer patent document 2, 3).

  Generally, it is configured separately from the vehicle battery and the battery state detection device that detects the state of the battery. However, in order to reduce the overall size, the battery state that displays the state of the battery in the upper lid of the lead battery A vehicle battery including a battery state detection device having a display unit and a battery state determination unit that detects the state of the battery is also known (see, for example, Patent Document 4).

JP-A-9-98504 JP 2006-010601 A Patent No. 3188100 JP 2005-339969 A

  However, there are still few vehicles equipped with the ISS system at present. For this reason, although the number of general users who manually attempt ISS is increasing, there is a risk of causing an accident such as a rear-end collision by a succeeding vehicle if the engine cannot be restarted after idling stop due to waiting for a signal. On the other hand, since the current flowing through the battery is not measured in the technique disclosed in Patent Document 4, an approximate battery state can be detected, but it is difficult to detect an accurate battery state. Therefore, when determining the state where idling can be stopped, the determination on the safe side is performed, and it is determined that the engine should not be stopped even though the engine can be restarted (idle stop). There is a risk of being made.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a battery that enables ISS safely by hand in a vehicle that is not equipped with an ISS system.

In order to solve the above-mentioned problem, a vehicle battery provided with a battery state detection device for detecting the state of the battery, wherein the battery state detection device includes current measuring means for measuring a current flowing through the battery, A voltage measuring means for measuring the voltage of the battery; and estimating the charged state and the deteriorated state of the battery from the current and the voltage measured by the current measuring means and the voltage measuring means; based is configured and a judgment means for exchanging determination of determination and the battery engine start of the vehicle, said current measuring means, an upper surface of said upper lid, and external standing on the top cover A hall-type current sensor disposed around the base of one of the external terminals, wherein the current measurement means, the voltage measurement means, and the determination means are integrated; Are detachably secured to the recessed portion formed in the upper cover, characterized in that.

In the present invention, batteries state detection device, charge state and the deterioration state of the battery estimated by the determining means, and, arranged near the driver's seat a result of the exchange determination of determination and battery engine start of the vehicle by radio or wired The notification device may further include transmission means for transmitting to the driver, and the notification device may notify the driver of the estimation or determination result by the determination means by buzzer sound or voice output or by LED or screen display. In this case, it is preferable that the transmission means transmits the estimation or determination result by the determination means to the notification means by wire, and the wiring between the battery and the notification device is removable by an attachment. Furthermore, the battery state detection device includes a communication unit that communicates with the control unit of the vehicle, and the communication unit starts the engine when the determination unit makes a negative determination as to whether or not the engine can be started in the idling / stop state. You may make it communicate with a control part. In the present invention, the first convex portion extends from the base of one of the external terminals erected on the upper lid toward the voltage measuring means, and from the voltage measuring means. The first voltage measurement line for measuring the voltage toward the first convex portion side is derived, and the first voltage measurement line may be joined to the tip portion of the first convex portion. . At this time, the second convex portion extends from the base portion of the other external terminal among the external terminals erected on the upper lid toward the voltage measuring means side, and the second from the voltage measuring means. A second voltage measurement line for measuring the voltage toward the convex portion side of the second convex portion is derived, and the second voltage measurement line may be joined to the tip of the second convex portion.

According to the present invention, the battery state detection device has, in addition to the voltage measurement means for measuring the voltage of the battery, the current measurement means for measuring the current flowing through the battery, and is measured by the voltage measurement means and the current measurement means. Since the determination means estimates the state of charge and deterioration of the battery from the measured current and voltage, and determines whether or not to start the engine of the vehicle and the replacement of the battery based on the estimated state of charge and deterioration. In a vehicle not equipped with a system, it is possible to enable ISS safely by hand, and the current measuring means is provided on either the upper surface of the upper lid or one of the external terminals erected on the upper lid. A hall-type current sensor arranged around the base of the terminal. The current measuring means, the voltage measuring means and the judging means are integrated into a recessed portion formed in the upper lid so as to be separable. Since it is, can be mounted on the vehicle in which the battery state detection device and the battery is not equipped with integrated ISS system is facilitated, such an effect that.

  Hereinafter, an embodiment in which the present invention is applied to a lead battery mounted on a vehicle such as a gasoline engine vehicle will be described with reference to the drawings.

(Configuration of lead battery)
As shown in FIG. 1, the lead battery 10 of this embodiment has a substantially rectangular battery case serving as a battery container, and a total of six electrode plate groups are accommodated in the battery case. As the material of the battery case, for example, a polymer resin such as polypropylene (PP) can be used. Each electrode plate group is formed by laminating a plurality of negative plates and positive plates with a separator interposed therebetween, and the cell voltage is 2.0V. For this reason, the nominal voltage of the lead battery 10 is set to 12V.

  The battery case is bonded or welded to an upper lid 1 made of a polymer resin such as PP that seals the upper opening of the battery case. The upper lid 1 is formed by injection molding using a mold. On one side of the upper lid 1 (lower side in FIG. 1), a bushing 5 of a lead member insert-molded in the upper lid 1 is erected. The bushing 5 functions as a positive external terminal and a negative external terminal for supplying power to the outside using the lead battery 10 as a power source.

  As shown in FIGS. 1 and 2, a hall-type current sensor 2 is disposed on the upper surface of the upper lid 1 and around the base of the bushing 5 that functions as a positive external terminal. In addition, a battery state detection device 3 for detecting the battery state of the lead battery 10 is disposed in the vicinity of the current sensor 2 and between one side of the upper lid 1 and the bushing 5. The current sensor 2 and the battery state detection device 3 are obtained by housing an individual electronic component mounted on a coil and a printed circuit board in a case made of PP, and fitted in a recessed portion formed on one side of the upper lid 1. Is fixed. For this reason, the current sensor 2 and the battery state detection device 3 are structured to be separable from the upper lid 1. As will be described later, the battery state detection device 3 estimates the charge state (SOC) and the deterioration state (SOH) of the lead battery 10 from the current flowing in the lead battery 10, the voltage and temperature of the lead battery 10, and estimated. Based on the state of charge and the state of deterioration, it is determined whether or not the engine of the vehicle can be started and whether or not the lead battery 10 is replaced.

  As shown in FIG. 2, a convex portion 7 extends from the approximate center of the base portion of the bushing 5 embedded in the upper lid 5 toward the battery state detection device 3 side. On the other hand, a voltage measurement line 6 for measuring the voltage of the lead battery 10 is led out from the battery state detection device 3, and the voltage detection line 6 is joined (connected) to the convex portion 7 of the bushing 5 by soldering. Yes. In FIG. 2, the connection state with the bushing 5 serving as the positive electrode external terminal is shown. Similarly, the convex portion of the bushing 5 serving as the negative electrode external terminal and the voltage measurement line derived from the battery state detection device 3 are also soldered. It is joined by attaching.

  In addition, a round hole that accommodates a temperature sensor (not shown) such as a thermistor for detecting the temperature of the lead battery 10 is formed in a substantially central portion and an upper portion (on the upper lid 1 side) of the battery case. It is fixed in the round hole with an adhesive or the like. The lead wire of the temperature sensor is led out to the battery state detection device 3.

  The battery state detection device 3 includes a voltage measurement means, a part of the current measurement means and a microcomputer as a determination means (hereinafter referred to as a microcomputer), a nonvolatile EEPROM, and differential amplification for measuring the voltage of the lead battery 10. An output circuit as a transmission means for outputting a circuit, an estimated charge state of the lead battery 10, a deterioration state, a vehicle engine start availability determination result, and a lead battery 10 replacement determination result to a notification device 4 described later, and the vehicle side A communication circuit or the like as communication means for performing wireless communication with the control system 11 is included, and operating power is supplied from the lead battery 10. The microcomputer is a CPU that functions as a central processing unit, a ROM that stores program data such as a basic control program of the battery state detection device 3 and mathematical expressions that will be described later, and a RAM that functions as a work area for the CPU and temporarily stores data. It is comprised including.

  The voltage measurement line 6 is connected to the A / D converter built in the microcomputer of the battery state detection device 3 through the differential amplifier circuit described above. The output sides of the current sensor 2 and the temperature sensor are respectively connected to an A / D converter built in the microcomputer. For this reason, the microcomputer can take in the voltage and temperature of the lead battery 10 and the current flowing through the lead battery 10 as digital values every predetermined time. In addition, the microcomputer samples the voltage, current, and temperature at predetermined time intervals (for example, the voltage and current are each 2 milliseconds and the temperature is 1 second), and the sampling result is stored in the RAM. Further, the current is divided into a discharge current and a charge current, and an integrated value of each is calculated.

  The voltage state detection device 3 is wired (wired) to the notification device 4 for notifying the driver of the estimated state of charge of the lead battery 10, the deterioration state, the vehicle engine start availability determination result, and the lead battery 10 replacement determination result. Connected with. For this reason, the alerting | reporting apparatus 4 is normally arrange | positioned in the position where it is easy to see for the driver near a driver's seat. The wiring to the lead battery 10 (battery state detection device 3) has a structure that can be removed by an attachment (connector) (not shown) arranged on the lead battery 10 side.

  As shown in FIG. 1, the notification device 4 is provided with LEDs that indicate to the driver the deterioration state of the lead battery 10, the state of charge, the availability of engine start, and the necessity of battery replacement. That is, the notification device 4 has three LEDs for indicating the deterioration state and the charging state of the lead battery 10, respectively, one LED for indicating whether the engine can be started, and whether the battery needs to be replaced. . Each LED is turned on and off by the output circuit of the battery state detection device 3 described above. Such an output circuit includes a D / A converter built in the microcomputer of the battery state detection device 3, a transistor mounted on a printed circuit board, a resistor, and the like. Table 1 below shows the relationship between LED lighting and the battery state of the lead battery 10.

(Relationship with vehicle)
Next, the relationship between the vehicle and the lead battery 10 will be described.

  As shown in FIG. 3, the positive external terminal of the lead battery 10 is connected to the center terminal of an ignition switch (hereinafter referred to as “IGN”) 15. The IGN15 has an OFF terminal, an ON / ACC terminal, and a START terminal in addition to the central terminal, and the central terminal and any of these OFF, ON / ACC, and START terminals can be switched in a rotary manner. is there.

  The START terminal is connected to an engine starting cell motor (starter) 19. The cell motor 19 can transmit a rotational driving force to the rotation shaft of the engine 18 via a clutch mechanism (not shown).

  The ON / ACC terminal is connected to one end of a generator 17 that generates electric power by rotation of the engine 18 through an auxiliary device 16 such as an air conditioner, a radio, and a lamp, and a regulator including a rectifying element that allows a current flow in one direction. It is connected. In other words, the anode side of the regulator is connected to one end of the generator 17, and the cathode side is connected to the ON / ACC terminal. The rotating shaft of the engine 18 can transmit power to the generator 17 via a clutch mechanism (not shown). For this reason, when the engine 18 is in a rotating state, the generator 17 is operated via a clutch mechanism (not shown), and the electric power from the generator 17 is supplied (charged) to the auxiliary machine 16 and the lead battery 10. Note that the OFF terminal is not connected to any of them.

(Lead battery operation)
Next, with respect to the operation of the lead battery 10 of the present embodiment, the microcomputer state of the battery state detection device 3 (hereinafter simply referred to as CPU) is mainly used to detect the engine state, the charge state of the lead battery 10 and the health. Description will be made in the order of state estimation, engine start availability determination, and battery replacement determination.

<Detection of engine status>
The CPU has a function of detecting the engine state based on the taken voltage of the lead battery 10. That is, the CPU constantly monitors (measures) the voltage of the lead battery 10 and detects the engine state of engine start, engine start, and engine stop based on the measured voltage change.

  Generally, in a vehicle having an internal combustion engine such as a gasoline engine vehicle or a diesel engine vehicle, electric power is supplied from a lead battery and a cell motor is rotated to start the engine. At this time, a large current flows, and accordingly, the voltage between the terminals of the lead battery 10 greatly drops. When the voltage drop at this time and the time change of the current are measured, a sharp peak-shaped large current flows immediately after the current starts to flow through the cell motor, and at the same time, the voltage between the terminals of the lead battery 10 shows a sharp valley-shaped voltage drop. . As will be described later, Ohm's law is established between the minimum voltage value Vpeak of the lead battery at the time of starting the engine, the maximum current value Ipeak flowing in the lead battery, and the resistance value of the automobile (vehicle). In other words, the Ohm's law is established only for a moment when the minimum voltage value Vpeak and the maximum current value Ipeak are taken, and the Ohm's law is not established otherwise.

  The CPU has a voltage drop of Y (0.50 to 3.0) V or more within X (1 to 100) ms after the start of discharge of the lead battery 10 (for example, a voltage drop of 1.5 V or more within 15 ms). In addition, it is determined whether or not a predetermined value a (a: a voltage value of 109 to 121% of the OCV of the lead battery 10) or more is reached, and if the determination is affirmative, it is determined that the engine has been started. On the other hand, when a negative determination is made, it is considered that an in-vehicle electrical component such as a car air conditioner or a car navigation system is activated (the engine is regarded as not started).

  After the affirmative determination of the engine start described above, the CPU always has a voltage of the lead battery 10 equal to or higher than the predetermined value a described above (since the generator (alternator, regulator) is operating when the engine is running, the lead battery 10 is in a charged state, and the voltage is higher than OCV.) When the determination is affirmative, it is determined that the engine is being started.

  (1) After determining that the engine is being started, if the voltage of the lead battery 10 becomes equal to or less than a certain value b: it is determined that the engine is stopped from the engine starting state. For example, a voltage value of 103 to 108% of the OCV of the lead battery 10 can be used as the voltage value of b. Also, (2) after determining that the engine is being started, when the voltage of the lead battery 10 decreases at a speed equal to or higher than a certain value c and the voltage drop is equal to or more than a certain value d: It is determined that the vehicle has stopped. The voltage drop rate of c can be 1.0 to 4.0 V / s, and the voltage drop width of d can be 0.05 to 0.20 V. Further, (3) after determining that the engine is in operation, the voltage of the lead battery 10 decreases to a certain value e or less, and the voltage change width at that time is a certain constant value f with a certain time width. When the value is less than or equal to g: It is determined that the engine is stopped from the engine starting state. A voltage value of 102 to 109% of the OCV of the lead battery 10 can be used as the voltage value of e, 0.01 to 1.0 s can be used as the value of f, and 0.1 to 0.3 V can be used as the change width of the voltage of g. . The CPU determines that the engine has stopped when any of (1) to (3) is met. Therefore, the CPU can determine whether or not the engine is idling / stopped (the engine is stopped and the lead battery 10 is loaded).

  The CPU captures the voltage of the lead battery 10 as an OCV at a predetermined time (for example, after 6 hours) when the polarization reaction of the lead battery 10 is canceled after the engine is stopped. The CPU keeps track of the time after the engine is stopped by an internal clock.

<Estimation of SOC and SOH of lead battery>
In general, the remaining capacity Q (Ah) of the lead battery can be obtained by the following equation (1). In equation (1), Qf represents the pre-travel capacity, Qout represents the discharge current integrated value, c1 represents the current coefficient, Qin represents the charge current integrated value, and c2 represents the charging efficiency.

  In the present embodiment, the CPU calculates the pre-travel capacity Qf as follows. As shown in FIG. 4, the OCV of the deteriorated product translates upward from the straight line of the new product (SOH 100%). Assuming that dV is translated upward with respect to a new product at SOHc%, the OCV correction value ΔOCV at SOHx% is expressed by the following equation (2).

  If the new pre-travel capacity Qf is expressed by equation (3) (a and b are constants), the pre-travel capacity Qf of the deteriorated product is expressed by equation (4).

  FIG. 5 shows the relationship between the remaining capacity Q after correction and the OCV. After correction, it almost coincides with a new straight line (a linear expression that defines the relationship between the remaining capacity and the OCV). For this reason, the CPU corrects the OCV with the SOH of the lead battery 10 and calculates (estimates) the remaining capacity Q of the lead battery 10, that is, the state of charge, according to equation (1). In addition, SOH can be calculated | required using techniques, such as patent document 2, 3 mentioned above, for example.

  The CPU displays the calculated (estimated) results of the state of charge (SOC) and the state of health (SOH) of the lead battery 10 on the notification device 4 via the output circuit described above.

<Determining whether the engine can be restarted>
FIG. 6 shows an equivalent circuit when the engine is started. From FIG. 6, the following expressions (5) and (6) hold. In the expressions (5) and (6), Vpeak is the minimum voltage value of the lead battery 10 at the time of starting the engine, Ipeak is the maximum current value flowing through the lead battery 10 at the time of starting the engine, OutR is the resistance value of the automobile, and InR is The internal resistance of the lead battery 10 is represented.

  From the equations (5) and (6), the following equation (7) is established.

  The CPU substitutes the estimated value Vexp of the minimum voltage at the time of engine (re) starting by substituting the current remaining capacity estimated value Q, the OCV (OCVsoc) obtained from the temperature, and the internal resistance (InRsoc) into the equation (8). calculate.

  Since the resistance value OutR of the automobile can be regarded as almost constant during the period of use, in this embodiment, the value obtained by dividing the minimum voltage value Vpeak of the lead battery 10 at the start of the engine several times after mounting the battery by the maximum current value Ipeak. (Average value) was obtained, the value was stored in the EEPROM, and the stored value was read out and used as the resistance value OutR of the automobile. When the measurement range of the current sensor 2 is narrow and the maximum current value Ipeak at the time of starting the engine cannot be measured, the resistance value OutR of the automobile may be calculated by the following equation (11).

  The internal resistance InR in the equation (11) is an internal resistance calculated by approximating the IV data at the time of starting the engine to the least square. Further, since the resistance value OutR of the automobile may be slightly different depending on the temperature, the temperature may be corrected.

  The CPU determines whether or not the estimated value Vexp of the minimum voltage at the time of starting the engine is Vexp ≦ Vmin with respect to the minimum voltage value Vmin for starting the engine. The minimum voltage value Vmin for starting the engine is about 6.8 to 7.8 V although it varies depending on the vehicle. In this embodiment, the voltage is 7.2V.

  When a negative determination is made, it is determined that the engine can be restarted (ISS) with the remaining capacity of the lead battery 10 even if the engine is stopped, and the LED for indicating whether or not the engine can be started of the notification device 4 is turned off via the output circuit (ISS). To display a possible state). When the determination is affirmative, it is further determined whether or not the idling stop state described above is in effect. When the determination is negative, since the lead battery 10 is charged by the generator 17 during engine start and ISS is possible, control is performed so that the engine start enable / disable display LED of the notification device 4 is turned off via the output circuit. . When the determination is affirmative, the lead battery 10 is not charged by the generator 17 and the ISS is disabled while the engine is stopped (idling / stop state), and therefore the LED for indicating whether the engine can be started or not of the notification device 4 is displayed via the output circuit. Control is performed to turn on (displays a state in which ISS is not possible), and wireless communication is performed to the vehicle control system 20 via the communication circuit so as to start the engine. As a result, the engine start enable / disable display LED of the notification device 4 is turned on, and the driver knows that ISS is impossible. On the other hand, since the vehicle control system 20 starts the engine 18, the lead battery 10 is charged by the generator 17. As described above, the CPU monitors the voltage of the lead battery 10 and the like every predetermined time and repeats the above calculation. Therefore, after a certain amount of time has elapsed after the engine is started, the lead battery 10 is charged and becomes ready for ISS. Along with this, the CPU controls the LED for indicating whether the engine can be started or not of the notification device 4 to be turned off via the output circuit.

FIG. 7 shows the relationship between the estimated value Vexp and the true value of the minimum voltage when the engine is started. For both new and deteriorated products, the estimated value Vexp of the minimum voltage at the start of the engine is almost the same as the true value. FIG. 7 shows the result at 25 ° C., but other temperatures have been confirmed.

<Battery replacement judgment>
As described above, the CPU calculates the SOH. For this reason, it is possible to determine whether or not the lead battery 10 needs to be replaced by determining whether or not SOH is less than a predetermined value (for example, 60%). When a negative determination is made, control is performed so that the LED for indicating whether the notification device 4 needs to be replaced is turned off (indicating a state where replacement is not required). Control is performed so that the LED is lit (displays a state that requires replacement).

(Effects etc.)
Next, effects and the like of the lead battery 10 of the present embodiment will be described.

  In the lead battery 10 of the present embodiment, the battery state detection device 3 has a current sensor 2 that measures the current flowing through the lead battery 10, and the lead battery is determined from the current flowing through the lead battery 10 and the voltage of the lead battery 10. 10 charging states and deterioration states are estimated, and whether or not the vehicle engine can be started and battery replacement is determined based on the estimated charging states and deterioration states. For this reason, in a vehicle that is not equipped with an ISS system, the driver can manually and safely enable ISS by referring to the notification device 4. Moreover, since the current sensor 2, the voltage measurement line 6 for measuring the voltage, and the battery state detection device 3 are disposed on the upper lid 1 of the lead battery 10, the battery state detection device 3 and the lead battery 10 are integrated. This makes it easy to mount on vehicles that are not equipped with an ISS system.

  Further, in the lead battery 10 of the present embodiment, the current sensor 2 is a hall type and is arranged around the base of the positive external terminal erected on the upper lid 1, and the current sensor 2 and the battery state detection device 3 are arranged. Since the structure can be integrated and fixed to the recessed portion of the upper lid 1, the battery state detection device 3 and the lead battery 10 can be reduced in size and improved in assembly (cost reduction), and thus is not equipped with an ISS system. Mounting on a vehicle becomes easier.

  Furthermore, in the lead battery 10 of this embodiment, since the wiring between the lead battery 10 (battery state detection device 3) and the notification device 4 is configured to be removable by an attachment, after the display device 4 is attached to the driver's seat, the lead Since it can connect with the battery 10, an attachment operation | work can be improved.

  In the lead battery 10 of the present embodiment, the remaining capacity (charged state) of the lead battery 10 is calculated by correcting the OCV measured by the CPU with the SOH of the lead battery 10. Therefore, regardless of the SOH of the lead battery 10, the relationship between the remaining capacity and the OCV is almost expressed by a primary expression, and deviation from the primary expression due to the SOH can be prevented, so that the remaining capacity (charged state) of the lead battery 10 can be prevented. ) Can be calculated with high accuracy. Therefore, the battery state detection device 3 can prevent erroneous determination as to whether or not the engine can be restarted.

  In the present embodiment, the lead battery 10 (battery state detection device 3) and the notification device 4 are connected by wire. However, the present invention is not limited to this and may be wireless. . In the present embodiment, an example of LED display is shown in the notification device 4, but the battery state may be notified by a buzzer sound, a voice, or a screen display such as a liquid crystal panel. Furthermore, in the present embodiment, when the determination of whether or not the engine can be started in the idling / stop state is a determination of “no”, an example of wireless communication with the vehicle control system 20 has been shown. You may make it connect with the vehicle control system 20 via this.

  In this embodiment, the battery state detection device 3 is fitted and fixed to the upper lid 1 of the lead battery 10. However, the battery state detection device 3 can be separated from the upper lid 1 by screwing or the like. Also good. Furthermore, in the present embodiment, the hall type current sensor 2 is exemplified, but a shunt type current sensor may be used. However, in the case of a shunt-type current sensor, the shunt-type current sensor must be connected between the bushing 5 as a terminal and the electrode plate inside the battery. Since it can be realized with a simpler structure, it is considered advantageous in terms of cost.

  Further, in order to prevent the entry of harmful substances, the boundary portion between the upper lid 1, the current sensor 2, and the battery state detection device 3 may be covered with a sheet or film. Further, a specific gravity sensor and a liquid level sensor may be built in the upper lid 1.

  The present invention is a vehicle not equipped with an ISS system, and provides a battery that can be safely and manually operated. Therefore, it contributes to the manufacture and sale of the battery, and thus has industrial applicability.

It is a top view of the lead battery of an embodiment which can apply the present invention. It is sectional drawing of the A-A 'cross section of FIG. It is a block circuit diagram of the vehicle carrying the lead battery of the embodiment. It is explanatory drawing for demonstrating the calculation method of (DELTA) OCV. It is a graph which shows the relationship between the remaining capacity of the lead battery after correction | amendment, and OCV. It is a circuit diagram which shows the equivalent circuit by the side of the motor vehicle at the time of engine starting, and the lead battery side. It is a graph which shows the relationship between the estimated value Vexp of the minimum voltage at the time of engine restart, and a true value.

Explanation of symbols

1 Upper lid 2 Current sensor (part of current measurement means)
3 Battery status detection device 5 Bushing (external terminal)
6 Voltage detection line (first voltage detection line)
7 convex part (first convex part)
10 Lead battery (battery)
20 Vehicle control system (vehicle control unit)

Claims (6)

A vehicle battery equipped with a battery state detection device for detecting the state of the battery,
The battery state detection device includes: a current measurement unit that measures a current flowing through the battery; a voltage measurement unit that measures a voltage of the battery; and the current and the voltage measured by the current measurement unit and the voltage measurement unit. The battery charging state and the deterioration state are estimated, and based on the estimated charging state and deterioration state, a determination unit that determines whether to start the engine of the vehicle and whether to replace the battery is configured .
The current measuring means is a hall-type current sensor disposed on the upper surface of the upper lid and around the base portion of any one of the external terminals erected on the upper lid,
The current measuring unit, the voltage measuring unit, and the determining unit are integrated and fixed to a recessed portion formed in the upper lid so as to be separable.
A battery characterized by that.   The battery state detection device is arranged in the vicinity of the driver's seat wirelessly or by wire with the charge state and deterioration state of the battery estimated by the determination means, and the determination result of whether the vehicle engine can be started or the replacement of the battery. 2. The transmission device according to claim 1, further comprising a transmission unit configured to transmit to the notification device, wherein the notification device notifies the driver of the estimation or determination result by the determination unit by buzzer sound or voice output or by LED or screen display. The battery described. The battery according to claim 2 , wherein the transmission unit transmits the estimation or determination result by the determination unit to the notification unit by wire, and the wiring between the battery and the notification device is detachable by an attachment.   The battery state detection device further includes a communication unit that communicates with a control unit of a vehicle, and the communication unit starts the engine when the determination unit makes a negative determination as to whether or not the engine can be started in an idling stop state. The battery according to claim 1, wherein the battery communicates with the controller. A first protrusion extends from the base of one of the external terminals erected on the upper lid toward the voltage measuring means, and the first voltage from the voltage measuring means. The first voltage measurement line for measuring the voltage toward the first convex portion side is derived, and the first voltage measurement line is joined to the tip of the first convex portion. The battery according to claim 1. A second convex portion extends from the base of one of the external terminals erected on the upper lid toward the voltage measuring means, and the voltage measuring means A second voltage measurement line for measuring a voltage toward the second convex portion side is derived, and the second voltage measurement line is joined to a tip portion of the second convex portion. The battery according to claim 5.

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