JP2006223035A - Battery control method - Google Patents

Abstract

A battery control method for a power supply device is provided that can supply energy to a load without interruption.
A power storage device includes a plurality of storage batteries, and when the remaining amount of energy of a storage battery that supplies energy to a load decreases, the storage battery is disconnected from the circuit, and the storage battery having a large amount of energy is connected to the circuit. By displaying and notifying that the battery has been switched, the battery is connected to a charging circuit for charging the storage battery whose energy remaining amount is low, and the storage battery is replaced.
[Selection] Figure 1

Description

  The present invention relates to a power supply device using a plurality of storage batteries.

  Using a storage battery consisting of a capacitor whose remaining energy is proportional to the square of the voltage and whose voltage decreases as the energy is extracted, a battery unit having a switching means between parallel connection and series connection is configured with a pair of storage batteries. The battery units are connected in series in a plurality of stages, and the output voltage fluctuation range is suppressed by switching the plurality of battery units step by step from parallel connection to series connection step by step as the output voltage decreases. In the parallel switching storage power supply, as a method of detecting the remaining amount of the storage battery, voltage detection means for detecting the output voltage of the series / parallel switching storage power supply and switching detection for detecting each switching signal of the plurality of battery units. Based on the voltage detected by the voltage detection means, the capacitance of the series-parallel switching storage power source and the switching signal of the battery units of the plurality of stages. It is known to include a calculation means for obtaining the remaining amount of energy of the serial / parallel switching storage power source.

This will be described with reference to FIG. FIG. 2 is a configuration diagram of a conventional power supply device. In FIG. 2, 101 is a series-parallel switching storage power supply circuit, 102 is an output adjustment circuit, 103 is a load, 104 is a coefficient addition arithmetic circuit, 105 is a remaining amount indicator, C11, C12, C21, C22 are storage batteries, S11 to S13, S21 to S23 are series / parallel changeover switches, and S14 and S24 are auxiliary switches. In this example, the variation of the voltage supplied to the output adjustment circuit 102 in the coefficient addition operation circuit 104 is minimized compared to the voltages of the storage batteries C11, C12, C21, and C22 that have consumed energy by the load 103 via the output adjustment circuit 102. The series / parallel connection of C11, C12, C21, and C22 is performed by calculating the combination of switching of the circuits of the series / parallel change-over switches S11 to S13 and S21 to S23 and operating the change-over switches S11 to S13 and S21 to S23. And the fluctuation of the voltage supplied to the output adjustment circuit 102 can be reduced. Japanese Patent No. 3529623 is known as a method for calculating the remaining amount of energy of a plurality of storage batteries and reducing the fluctuation of the output voltage of the power supply device.
Japanese Patent No. 3529623

  Such a power supply device can reduce the fluctuation of the output voltage and maximize the energy of the storage battery. However, since the storage battery is always incorporated in the circuit in the device, all the storage batteries consume all the energy. If the storage battery cannot be removed until all the energy of the storage battery is consumed, the power supply function of supplying power to the load stops and the function as a power supply In order to recover, there is a problem that it is necessary to charge each storage battery separately from the circuit. Accordingly, an object of the present invention is to provide a method capable of replenishing energy without stopping the function of a power supply device that supplies power to a load.

  In the present invention, as a means for preventing the function of the power supply device from being stopped, a plurality of storage batteries can be alternately charged. The power supply unit is equipped with multiple storage batteries, and when the remaining energy level of the storage battery that supplies energy to the load decreases, the storage battery is disconnected from the circuit, and a storage battery with a large remaining energy level is connected to the circuit to reduce the remaining energy level. It connects to or replaces a charging circuit for charging the storage battery.

  According to the present invention, the storage battery can be charged or replaced without stopping the power supply.

  A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing the configuration of the first embodiment of the present invention. The same parts as those in FIG. In FIG. 1, S31 and S32 are switches according to the present invention, and S31 and S32 are always connected to either a and c or b and c, and S31 and S32 always have the same combination of a and c, or Interlock so that the circuits of b and c are connected. The output adjustment circuit 102 is a circuit that maintains the voltage or current supplied to the load 103 at a constant value. The voltage detection circuit 106 measures the voltages Va and Vb of the storage battery C3a and the storage battery C3b, compares whether the voltage is higher or lower than the preset voltage Vt, and determines the circuit to which the switches S31 and S32 are connected according to the result. Switch. The voltage set in advance in the voltage detection circuit 106 is a voltage determined that the remaining energy of the storage battery is reduced and needs to be charged, and can be changed according to the type and performance of the storage battery C3a and the storage battery C3b.

  Next, the operation will be described. It is assumed that both storage batteries C3a and C3b are sufficiently charged in advance. The switches S31 and S32 are connected to circuits a and c as shown in FIG. 1, and power is supplied to the output adjustment circuit 102 from the storage battery C3a through S31, and power is supplied from the output adjustment circuit 102 to the load 103. Has been. When the power from the load 103 is consumed and the voltage Va of the storage battery C3a becomes lower than the voltage Vt set in the voltage detection circuit 106, the voltage detection circuit 106 is charged because the remaining energy of the storage battery C3a has decreased. It is determined that it is necessary, the connection between S31 and S32 is changed, and the circuits b and c are connected.

  Then, the storage battery C3a is disconnected from the output adjustment circuit 102 by S31, the storage battery C3b is connected to the output adjustment circuit 102 through S31, and power is continuously supplied to the load 103. The storage battery C3a is connected to the charging device 107 through the switch S32, and the storage battery C3a is charged by the power supplied from the charging device 107. The time required for the charging device 107 to fully charge the storage battery C3a is the time required until the power is consumed by the load 103 and the voltage Vb of the storage battery C3b becomes lower than the voltage Vt set in the voltage detection circuit 106. It is assumed that the time is sufficiently short. After the voltage Va of the storage battery C3a becomes higher than the voltage Vt set in the voltage detection circuit 106 in the charging device 107, the power by the load 103 is consumed, and the voltage Vb of the storage battery C3b is set to the voltage detection circuit 106 When the voltage becomes lower than Vt, the voltage detection circuit 106 determines that charging is necessary because the remaining energy of the storage battery C3b has decreased, changes the connection between S31 and S32, and connects the circuits a and c.

  Then, the storage battery C3b is disconnected from the output adjustment circuit 102 by S31, the storage battery C3a is connected to the output adjustment circuit 102 through S31, and power is continuously supplied to the load 103. The storage battery C3b is connected to the charging device 107 through the switch S32, and the storage battery C3b is charged by the power supplied from the charging device 107. As described above, the storage battery C3a and the storage battery C3b are alternately connected to the voltage adjustment circuit 102 and the charging device 107, and while supplying power to the load 103 on the other hand, charging is performed by the charging device on the other side, The energy of the storage battery can be replenished while supplying electric power to 103 without interruption.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing a second embodiment of the present invention, in which the same parts as those in FIGS. In FIG. 3, S41 and S42 are switches according to the present invention, and S41 and S42 are always connected to either a and d, or b and d, or c and d, and S41 and S42 are always in the same combination. A and d, or b and d, or c and d are connected so as to be connected. The voltage detection circuit 108 measures the voltages Va, Vb, and Vc of the storage battery C3a, the storage battery C3b, and the storage battery C3c, and compares the voltage Vat with a voltage Vt that is higher or lower than a preset voltage Vt. Change the circuit to connect to. The voltage set in advance in the voltage detection circuit 108 is a voltage at which the remaining energy of the storage battery is reduced and is determined to require charging, and can be changed depending on the type and performance of the storage battery C3a, the storage battery C3b, and the storage battery C3c. It is.

  Next, the operation will be described. It is assumed that storage batteries C3a, C3b, and C3c are fully charged in advance. The switches S41 and S42 are connected to circuits a and d as shown in FIG. 3, and power is supplied to the output adjustment circuit 102 from the storage battery C3a through S41, and power is supplied from the output adjustment circuit 102 to the load 103. Has been. When the power from the load 103 is consumed and the voltage Va of the storage battery C3a becomes lower than the voltage Vt set in the voltage detection circuit 108, the voltage detection circuit 108 is charged because the remaining energy of the storage battery C3a has decreased. It is determined that it is necessary, the connection between S41 and S42 is changed, and the circuits b and d are connected. Then, the storage battery C3a is disconnected from the output adjustment circuit 102 by S41, the storage battery C3b is connected to the output adjustment circuit 102 through S41, and power is continuously supplied to the load 103.

  The storage battery C3a is connected to the charging device 107 through the switch S42, and the storage battery C3a is charged by the power supplied from the charging device 107. The time required for the charging device 107 to fully charge the storage battery C3a is the time required until the power is consumed by the load 103 and the voltage Vb of the storage battery C3b becomes lower than the voltage Vt set in the voltage detection circuit 108. It is assumed that the time is sufficiently short. After the voltage Va of the storage battery C3a becomes higher than the voltage Vt set in the voltage detection circuit 106 in the charging device 108, the power from the load 103 is consumed, and the voltage Vb of the storage battery C3b is set to the voltage set in the voltage detection circuit 108 When the voltage is lower than Vt, the voltage detection circuit 108 determines that charging is necessary because the remaining energy of the storage battery C3b has decreased, changes the connection between S41 and S42, and connects the circuits c and d.

  Then, the storage battery C3b is disconnected from the output adjustment circuit 102 by S41, the storage battery C3c is connected to the output adjustment circuit 102 through S41, and power is continuously supplied to the load 103. The storage battery C3b is connected to the charging device 107 through the switch S42, and the storage battery C3b is charged by the power supplied from the charging device 107. After the voltage Vb of the storage battery C3b becomes higher than the voltage Vt set in the voltage detection circuit 108 in the charging device 108, power is consumed by the load 103, and the voltage Vc of the storage battery C3c is set to the voltage set in the voltage detection circuit 108 When the voltage becomes lower than Vt, the voltage detection circuit 108 determines that charging is necessary because the remaining energy of the storage battery C3c has decreased, changes the connection between S41 and S42, and connects the circuits a and d.

  Then, the storage battery C3c is disconnected from the output adjustment circuit 102 by S41, the storage battery C3a is connected to the output adjustment circuit 102 through S41, and power is continuously supplied to the load 103. The storage battery C3c is connected to the charging device 107 through the switch S42, and the storage battery C3c is charged by the power supplied from the charging device 107. As described above, the storage battery C3a, the storage battery C3b, and the storage battery C3c are sequentially connected to the voltage adjustment circuit 102 and the charging device 107, while supplying power to the load 103 while being charged by the charging device on the other side. Repeatedly, the energy of the storage battery can be replenished while supplying power to the load 103 without interruption.

  A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a diagram showing the configuration of the third embodiment of the present invention. The same parts as those in FIG. 1, FIG. 2 and FIG. S31 is always connected to either a and c or b and c. The output adjustment circuit 102 is a circuit that maintains the voltage or current supplied to the load 103 at a constant value. The voltage detection circuit 106 measures the voltages Va and Vb of the batteries B3a and B3b, compares the voltages Va and Vb with each other, and switches the circuit to which the switch S31 is connected according to the result. The voltage set in advance in the voltage detection circuit 106 is a voltage at which the remaining energy of the battery is reduced and it is determined that the battery needs to be replaced, and can be changed depending on the type and performance of the batteries B3a and B3b. . The display circuit 109 is a light emitting device for notifying the replacement time of the batteries B3a and B3b.

  Next, the operation will be described. Both batteries B3a and B3b are assumed to have sufficient energy remaining. As shown in FIG. 1, the switch S31 is connected to circuits a and c. The output adjustment circuit 102 is supplied with electric power from the battery B3a through S31, and the output adjustment circuit 102 is supplied with electric power to the load 103. Yes. When the power of the load 103 is consumed and the voltage Va of the battery B3a becomes lower than the voltage Vt set in the voltage detection circuit 106, the voltage detection circuit 106 is replaced because the remaining energy of the battery B3a has decreased. It is determined that it is necessary, the connection of S31 is changed, and the circuits b and c are connected. Then, the battery B3a is disconnected from the output adjustment circuit 102 by S31, the battery B3b is connected to the output adjustment circuit 102 through S31, and power is continuously supplied to the load 103.

  Here, the voltage detection circuit 106 notifies the display circuit 109 that the battery B3a needs to be replaced, and the display circuit 109 emits light to display that the battery B3a needs to be replaced. . The manager who sees the display on the display circuit 109 replaces the battery B3a with a battery with remaining energy. The replacement of the battery B3a can be determined by the voltage Va of the battery B3a being higher than the voltage Vt set in the voltage detection circuit 106, and the display circuit 109 needs to be replaced with the battery B3a. The display circuit 109 stops emitting light and indicates that the battery B3a has enough energy remaining to be replaced and does not need to be replaced. After the battery is replaced, when the power by the load 103 is consumed and the voltage Vb of the battery B3b becomes lower than the voltage Vt set in the voltage detection circuit 106, the voltage detection circuit 106 determines that the remaining energy of the battery B3b. Therefore, it is determined that charging is necessary, the connection of S31 is changed, and the circuits a and c are connected.

  Then, the battery B3b is disconnected from the output adjustment circuit 102 by S31, the battery B3a is connected to the output adjustment circuit 102 through S31, and power is continuously supplied to the load 103. Here, the voltage detection circuit 106 notifies the display circuit 109 that the battery B3b needs to be replaced, and the display circuit 109 emits light to display that the battery B3b needs to be replaced. . The administrator who sees the display on the display circuit 109 replaces the battery B3b with a battery with remaining energy. The replacement of the battery B3b can be determined by the voltage Vb of the battery B3b being higher than the voltage Vt set in the voltage detection circuit 106, and the display circuit 109 needs to be replaced with the battery B3b. The display circuit 109 stops emitting light, indicating that the battery B3b has sufficient remaining energy and does not need to be replaced. As described above, the battery B3a and the battery B3b are alternately connected to the voltage adjustment circuit 102, and the cycle of replacing the battery with a sufficient remaining energy while being disconnected from the voltage adjustment circuit 102 is repeated. The battery can be replaced while supplying electric power without interruption.

  In the above embodiment, the number of storage batteries or batteries is 2 to 3, but the same effect can be obtained even if the number is more than that. In addition, in the case of a storage battery, it was connected to a charging device, and charging and power supply were repeated. However, the storage battery was not connected to the charging device, indicating that the battery needs to be replaced, and the remaining energy was reduced. The same effect can be obtained by replacing the storage battery with a storage battery having a sufficient amount of remaining energy. In addition, the display device indicating that the battery needs to be replaced is not limited to the light emitting device, and a similar effect can be obtained by a sound generation device or signal notification through wired or wireless.

The block diagram in the Example of this invention. The block diagram of a conventional system. The block diagram in the 2nd Example of this invention. The block diagram in the 3rd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Series-parallel switching storage power supply circuit 102 ... Output adjustment circuit 103 ... Load 104 ... Coefficient addition arithmetic circuit 105 ... Remaining amount indicator 106, 108 ... Voltage detection circuit 107 ... Charging device 109 ... Display circuit C11, C12, C21, C22 , C3a, C3b, C3c ... storage batteries B3a, B3b ... batteries S11-S13, S21-S23 ... series-parallel changeover switch S14, S24 ... auxiliary switch S31, S32, S41, S42 ... connection destination circuit changeover switch

Claims (3)

  In a power supply device having a plurality of energy storage means, the energy storage means is two storage batteries, each connected to a circuit for supplying the energy of the storage battery to a load and a device for charging the storage battery. A changeover switch is provided so that energy can be supplied to the load with one storage battery while the other battery can be replenished with energy at the same time, and energy can be supplied to the load without interruption. The battery control method for the power supply.   2. The battery control system according to claim 1, wherein the energy storage means of claim 1 is composed of three pieces.   2. The battery control system according to claim 1, wherein the energy replenishing means according to claim 1 is based on battery replacement.

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