JP5444190B2 - Battery control system, battery control method, and battery control program - Google Patents

Description

  The present invention relates to a battery control system, a battery control method, and a battery control program for controlling a battery built in an electronic device, and more particularly to a battery control system, a battery control method, and a battery control suitable for an electronic device using a smart battery. Regarding the program.

  In recent notebook computers, a battery pack conforming to the smart battery standard is adopted. The smart battery standard is formulated by the SBS-IF (Smart Battery System Implementers Forum). A battery pack conforming to this standard is composed of an assembled battery using a plurality of battery cells, and a gas gauge IC as an IC (integrated circuit) for managing characteristics such as the remaining amount, voltage, current, and temperature of the battery. Is incorporated. The battery cell of the battery pack compliant with the smart battery standard is generally lithium ion or nickel metal hydride.

  The battery cells constituting the battery pack have a high internal impedance and a large voltage drop in a low temperature environment of 0 ° C. or lower. For this reason, when the battery pack is used at 0 ° C. or lower, the battery operating time may be shortened due to a voltage drop, or the system may be shut down. In addition, when the battery is started with a large current consumption in a state where the impedance of the battery is high, a load is applied to the battery, and the deterioration is faster than in a normal use state. Therefore, in order to avoid the occurrence of such a problem, the operating temperature of general notebook computers often has a lower limit of 0 ° C. In a first related technique (see, for example, Patent Document 1) related to the present invention, the battery is controlled after the apparatus is started in consideration of the above situation regarding the battery pack.

  However, some industrial notebook computers are required to be used in a low temperature environment of 0 ° C. or lower. For such a notebook computer of a specific application that can be started at 0 ° C. or less, a dedicated battery cell having good low temperature environment characteristics is adopted. In addition, the remaining capacity value and the shutdown voltage value are corrected by the gas gauge IC to minimize the risk of system shutdown.

  As described above, the notebook computer consumes a large amount of power during startup. In particular, notebook computers with a built-in hard disk drive consume a large amount of power during startup because the power fluctuation during startup is large and the battery is coldest at startup and the cell temperature is low. If this happens, a large voltage drop will occur. When the battery pack is new, the problem caused by the voltage drop does not occur relatively. However, when the battery pack is used for a long period of time and the characteristics deteriorate, there is a problem that the battery usage time is shortened or a shutdown occurs due to a voltage drop during startup.

  Therefore, as a second related technique related to the present invention, it has been proposed to heat a battery at a low temperature (see, for example, Patent Document 2). In the second related technology, the battery pack detects the current and temperature of the battery to detect the remaining capacity, and determines whether the battery can be heated from the detection result. If the determination result indicates that the battery should be heated, the battery is heated by the heating means.

JP 2004-334475 A (paragraph 0005) JP 2009-054419 (paragraphs 0010, 0032, 0064, FIG. 1)

  When a heater is used as a battery heating means, power consumption is large. For this reason, in the second related technique, it is necessary to use an external power source for the heater, and the battery cannot be heated in a place without the external power source. In addition, the second related technology proposes that an electric circuit is arranged near the battery and uses heat generated by the electric circuit, but this is not realistic. In general, the heat generated in the electric circuit is negligible, and not only the heat generated by heating the battery cannot be expected, but also the electrolyte inside the battery cell even when the battery is heated from the outside in a low temperature environment such as −15 ° C. or lower. This is because a considerable amount of time is required to raise the temperature.

  Furthermore, the second related technique also describes heating by discharging the battery itself. However, when the battery is simply discharged, a voltage drop of the power source occurs accordingly. The second related technology does not disclose any means for preventing this voltage drop, and it is difficult to realize heating by discharging the battery itself in such a situation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a battery control system, a battery control method, and a battery control program that enable power control that appropriately suppresses a voltage drop of a battery when the apparatus is started up in a low temperature environment.

  In the present invention, (a) temperature detecting means for detecting the temperature at the time of starting the apparatus, (b) a battery for supplying power to various components constituting the apparatus, and (c) power consumption of the apparatus using the battery described above. A constant power control circuit that performs constant power control of all the various components that constitute the above-described device such that the temperature is equal to or less than a specific upper limit value; and A comparison means for setting the current value flowing through the various parts as described above to a predetermined initial current value and comparing the amount of voltage drop per unit time with a predetermined threshold when detecting a temperature below the temperature; (e) Current increasing means for increasing the current flowing in the constant power control circuit by one step when the comparison result of the comparing means is equal to or less than the threshold value; and (f) the increase in current by the current increasing means is set to a predetermined value. Reach And (b) repetitive means for reversing the comparison process by the comparison means and the one-step increase process of the current by the current increasing means, and (g) the above-mentioned when the increase in current reaches a predetermined value by this repetitive means. Current limit canceling means for canceling the limit of the current flowing through the various parts; and (h) when the temperature detecting means detects the temperature above a predetermined temperature when the apparatus is started, the above-described constant value is set from the start of the apparatus. The battery control system includes normal temperature control means for controlling the power consumption of all the various components constituting the above-described apparatus without limiting the current flowing through the various components using the power control circuit.

  In the present invention, (a) temperature detecting means for detecting a temperature at the time of starting the apparatus, (b) a battery for supplying power to various components constituting the apparatus, and (c) a voltage drop with respect to the power consumption of the battery A voltage drop amount determining means for determining whether the amount is equal to or less than a predetermined threshold; and (d) the possibility of a time lag in the start of power supply from the time of starting the device to various parts constituting the device. Switch means for individually controlling the start of power supply for each group when time-classified into a plurality of groups on the basis of, and (e) a specific temperature predetermined by the temperature detecting means described above A start time control means for starting the power supply by the battery from the parts of the group first classified in time series when the apparatus is started, and (f) one start group by the start time control means. After the power supply to the parts of the battery is started, the voltage drop amount determining means waits for each of the groups to determine that the voltage drop amount with respect to the battery power consumption is less than the threshold value. Power supply start control means for each group that controls the timing of starting power supply to a group of (ii), and (g) when the above-described temperature detection means detects a predetermined temperature or higher, the power consumption of all parts in all groups The battery control system includes constant power control means for performing constant power control from the time of starting the apparatus.

  Further, in the present invention, (a) a temperature detecting step for detecting the temperature at the time of starting the apparatus, and (b) when the temperature detecting step detects a temperature lower than a predetermined temperature as a temperature at the time of starting the apparatus. A comparison step in which the current value flowing from the battery in each of the components constituting the circuit is set to a predetermined initial current value, and the amount of voltage drop per unit time is compared with a predetermined threshold value, and (c) a comparison result of this comparison step A current increasing step for increasing the current flowing from the battery by one step when the current falls below the threshold value, and (d) by the comparing step described above until an increase in current due to the current increasing step reaches a predetermined value. A recoil step for reversing the comparison process and the process of increasing the current by one step by the current increase step; and (e) increasing the current by the recoil step. When the current reaches a predetermined value, a current limit release step for canceling the limit of the current flowing through the various parts as described above, and (f) a temperature that is predetermined by the temperature detection step described above at the time of starting the device When detected, the above-described apparatus is configured without increasing the current flowing through the various components in stages using the repetitive step described above from the time of starting the apparatus and releasing the current limitation in stages. The battery control method includes a normal temperature control step of performing constant power control of power consumption of the entire various components.

  Furthermore, in the present invention, (b) a temperature detection step for detecting a temperature at the time of starting the apparatus, and (b) various types of components constituting the apparatus described above when a temperature lower than a predetermined temperature is detected in the temperature detection step. As described above, the components are classified into a plurality of groups in a time series based on the possibility of time lag in the start of power supply by the battery from the time of starting the device. A control step at the time of starting power supply by the battery, and (c) after the power supply to the components of one group is started, the group waits for the voltage drop amount of the battery to become a predetermined threshold value or less. A power supply start control step for each group that controls the timing of the start of power supply sequentially until the last group, and (d) a specific predetermined in the above-described temperature detection step Constant power control step and the battery control method of constant power control the power consumption of the entire part of the entire group from the time of device activation when detecting a higher degree is provided.

  Further, in the present invention, as a battery control program, (b) a temperature detection process for detecting the temperature at the time of starting the apparatus, and (b) a specific temperature predetermined as the temperature at the time of starting the apparatus by this temperature detection process A comparison process for setting a current value flowing from the battery to various parts constituting the above-described device to a predetermined initial current value and comparing a voltage drop amount per unit time with a predetermined threshold when detecting less than (C) a current increase process for increasing the current flowing from the battery by one step when the comparison result of the comparison process is equal to or less than the above-described threshold; and (d) a current increase due to the current increase process is a predetermined value. And (v) a reversal process for reversing the comparison by the comparison process described above and the process for increasing the current by one step by the current increase process until the current reaches When the increase reaches a predetermined value, the current limit canceling process for canceling the limit of the current flowing through the various components as described above, and (f) above a specific temperature determined in advance by the temperature detection process described above when the apparatus is activated When the device is detected, the above-described device is configured without stepwise increasing the current flowing through the various components using the repetitive processing described above from the time of starting the device and releasing the current limitation stepwise. And normal temperature control processing for performing constant power control of the power consumption of all the various components to be executed.

  Furthermore, in the present invention, when the computer detects, as a battery control program, (a) a temperature detection process for detecting the temperature at the time of starting the apparatus, and (b) when a temperature lower than a predetermined temperature is detected in the temperature detection process, When the various parts constituting the device were classified into a plurality of groups in chronological order based on the possibility of time lag in the start of power supply by the battery from the time of starting the device, they were classified first. A control process at the time of starting the power supply by the battery from the group parts, and (c) after the power supply to the parts of one group is started, the voltage drop amount of the battery is equal to or less than a predetermined threshold value. A group-by-group power supply start control process for controlling the timing of the start of power supply for each group in sequence until the last group, and (d) the temperature detection process described above. In executing a constant power control process of the constant power control the power consumption of the entire part of the entire group from the time of device activation upon detecting more than a predetermined specified temperature.

  As described above, according to the present invention, the current flowing from the battery to the load in a predetermined low temperature environment is increased stepwise while monitoring the voltage drop. By such stable load control, the temperature of the battery cell gradually increases and the internal impedance of the battery cell decreases. As a result, the battery can be prevented from deteriorating and the battery usage time can be extended.

  Further, according to the present invention, various parts constituting the apparatus are divided into groups, and control is performed to shift the timing of starting the power supply from the start of the apparatus startup in a predetermined low temperature environment. Thereby, it is possible to supply power from the battery to each component constituting the apparatus at a necessary timing, and it is possible to efficiently use power.

It is a claim corresponding | compatible figure of the battery control system of this invention. It is a claim corresponding | compatible figure of the other battery control system of this invention. It is a claim corresponding | compatible figure of the battery control method of this invention. It is a claim corresponding | compatible figure of the other battery control method of this invention. It is a claim corresponding | compatible figure of the battery control program of this invention. It is a claim corresponding | compatible figure of the other battery control program of this invention. It is a system configuration figure showing composition of a battery control system in an embodiment of the invention. It is a circuit diagram showing the structure of the constant power control circuit in this Embodiment. It is a circuit diagram showing the circuit structure of the smart battery in this Embodiment. It is a flowchart showing the mode of control of the maximum electric current value at the time of starting of the notebook computer in this Embodiment. FIG. 6 is a characteristic diagram showing a temporal change in load current value at the time of startup of the notebook computer at a temperature of 0 ° or less according to the present embodiment. FIG. 11 is a characteristic diagram illustrating an example of a change in load current from the startup of the notebook computer in a low temperature environment according to a modification of the present invention.

  FIG. 1 is a diagram corresponding to claims of the battery control system of the present invention. The battery control system 10 of the present invention includes a temperature detection means 11, a battery 12, a constant power control circuit 13, a comparison means 14, a current increase means 15, a rebound means 16, a current limit release means 17, A temperature control means 18 is provided. Here, the temperature detection means 11 detects the temperature when the apparatus is activated. The battery 12 supplies power to various components that constitute the apparatus. The constant power control circuit 13 uses the battery 12 to perform constant power control of all the various components that constitute the above-described device so that the power consumption of the device is not more than a specific upper limit value. When the temperature detecting means 11 detects a temperature lower than a predetermined temperature at the time of starting the apparatus, the comparing means 14 sets the current value flowing through the various parts as a predetermined initial current value per unit time. Is compared with a predetermined threshold value. The current increasing unit 15 increases the current flowing through the constant power control circuit 13 by one step when the comparison result of the comparing unit 14 is equal to or less than the above threshold value. The repulsion means 16 repeats the comparison process by the comparison means 14 and the one-step increase process of the current by the current increase means 15 until the increase in current by the current increase means 15 reaches a predetermined value. The current limit release means 17 releases the restriction on the current flowing through the various components as described above when the increase in current reaches a predetermined value by the rebound means 16. The normal temperature control means 18 limits the current flowing through the various components using the constant power control circuit 13 from the time of starting the apparatus when the temperature detecting means 11 detects a predetermined temperature or higher when the apparatus is started. Without this, the power consumption of all the various parts constituting the above-described apparatus is controlled.

  FIG. 2 is a diagram corresponding to claims of another battery control system of the present invention. Another battery control system 20 of the present invention includes a temperature detection unit 21, a battery 22, a voltage drop amount determination unit 23, a switch unit 24, a start time control unit 25, and a group-specific power supply start control unit 26. The constant power control means 27 is provided. Here, the temperature detection means 21 detects the temperature at the time of starting the apparatus. The battery 22 supplies power to various components that constitute the apparatus. The voltage drop amount determination unit 23 determines whether the voltage drop amount with respect to the power consumption of the battery 22 is equal to or less than a predetermined threshold value. The switch means 24 is used when the various components constituting the device are classified into a plurality of groups in a time series based on the possibility of a time lag in the start of power supply from the time of starting the device. It is possible to individually control the start of the power supply of the group. When the temperature detection unit 21 detects a temperature lower than a predetermined temperature, the start-time control unit 25 starts power supply from the battery 22 from the parts of the group first classified in time series when the apparatus is activated. The group-specific power supply start control means 26, after the start-time control means 25 starts supplying power to one group of components, the voltage drop amount determination means 23 determines the voltage drop amount relative to the battery power consumption as described above. Each time it is determined that the value is equal to or less than the threshold value, the power supply start timing is controlled for each group up to the last group. The constant power control means 27 performs constant power control on the power consumption of all components in all groups when the apparatus is activated when the temperature detection means 21 detects a predetermined temperature or higher.

  FIG. 3 is a diagram corresponding to the claims of the battery control method of the present invention. The battery control method 30 of the present invention includes a temperature detection step 31, a comparison step 32, a current increase step 33, a recoil step 34, a current limit release step 35, and a normal temperature control step 36. Here, in the temperature detection step 31, the temperature at the time of starting the apparatus is detected. In the comparison step 32, when the temperature detection step 31 detects a temperature lower than a predetermined temperature as the temperature at the time of starting the device, the current value flowing from the battery to various parts constituting the device is set to a predetermined initial current value. Set and compare the amount of voltage drop per unit time with a predetermined threshold. In the current increase step 33, the current flowing from the battery is increased by one step when the comparison result in the comparison step 32 is equal to or less than the above threshold value. In the repeat step 34, the comparison process by the comparison step 32 and the process of increasing the current by one step by the current increase step 33 are repeated until the increase in current by the current increase step 33 reaches a predetermined value. In the current limit release step 35, when the increase in the current reaches a predetermined value in the repetitive step 34, the restriction on the current flowing through the various components is canceled. In the normal temperature control step 36, when a temperature higher than the specific temperature predetermined in the temperature detection step 31 is detected at the time of starting the device, the current flowing through the various components using the repetitive step 34 from the time of starting the device. The power consumption of all the various parts constituting the device is controlled at a constant power without increasing the current stepwise and releasing the current limit stepwise.

  FIG. 4 is a diagram corresponding to claims of another battery control method of the present invention. Another battery control method 40 of the present invention includes a temperature detection step 41, a start time control step 42, a group-specific power supply start control step 43, and a constant power control step 44. Here, in the temperature detection step 41, the temperature at the time of starting the apparatus is detected. In the start time control step 42, when the temperature detection step 41 detects a temperature lower than a predetermined temperature, the various components constituting the above-described device are timed to start the supply of power by the battery from the above-described device start-up. Based on the possibility of deviation, power supply by the battery described above is started from the parts of the group first classified when the time series is classified into a plurality of groups. In the group-specific power supply start control step 43, after the power supply to the components of one group starts, it waits for the voltage drop amount of the battery to be equal to or less than a predetermined threshold, and then to the last group for each group. Sequentially, the timing of the start of power supply is controlled. In the constant power control step 44, constant power control is performed on the power consumption of all components in all groups when the apparatus is activated when a temperature equal to or higher than a predetermined temperature detected in the temperature detection step 41 is detected.

  FIG. 5 is a diagram corresponding to claims of the battery control program of the present invention. The battery control program 50 of the present invention causes a computer to execute a temperature detection process 51, a comparison process 52, a current increase process 53, a rebound process 54, a current limit release process 55, and a normal temperature control process 56. I am doing so. Here, in the temperature detection process 51, the temperature at the time of starting the apparatus is detected. In the comparison process 52, when the temperature detection process 51 detects a temperature lower than a predetermined specific temperature as the apparatus start-up, the current value flowing from the battery to the various components constituting the apparatus is changed to a predetermined initial current value. Set and compare the amount of voltage drop per unit time with a predetermined threshold. In the current increase process 53, the current flowing from the battery is increased by one step when the comparison result of the comparison process 52 is equal to or less than the threshold value. In the repetitive process 54, the comparison by the comparison process 52 and the process of increasing the current by one step by the current increase process 53 are repeated until the increase in current by the current increase process 53 reaches a predetermined value. In the current limit release processing 55, when the increase in current reaches a predetermined value by the repetitive processing 54, the restriction on the current flowing through the various components is canceled. In the normal temperature control process 56, when the temperature detection process 51 detects a temperature higher than a predetermined temperature at the time of starting the apparatus, the current flowing through the various components using the rebound process 54 from the start of the apparatus. The power consumption of all the various parts constituting the device is controlled at a constant power without increasing the current stepwise and releasing the current limit stepwise.

  FIG. 6 shows a claim correspondence diagram of another battery control program of the present invention. Another battery control program 60 of the present invention causes the computer to execute a temperature detection process 61, a start time control process 62, a group-specific power supply start control process 63, and a constant power control process 64. Here, in the temperature detection process 61, the temperature at the time of starting the apparatus is detected. In the start-time control process 62, when the temperature detection process 61 detects a temperature lower than a predetermined temperature, the various components constituting the above-described device are timed to start the supply of power by the battery from the above-described device start-up. Based on the possibility of deviation, power supply by the battery described above is started from the parts of the group first classified when the time series is classified into a plurality of groups. In the group-by-group power supply start control process 63, after the power supply to the components of one group is started, the process waits until the voltage drop amount of the battery becomes equal to or less than a predetermined threshold until the last group for each group. Sequentially, the timing of the start of power supply is controlled. In the constant power control process 64, when the temperature detection process 61 detects a predetermined temperature or higher, the constant power control is performed on the power consumption of all the components in all groups from the time of starting the apparatus.

  <Embodiment of the Invention>

  Next, an embodiment of the present invention will be described.

  FIG. 7 shows the configuration of the battery control system in the embodiment of the present invention. This battery control system 100 is intended for a notebook computer 101. The notebook computer 101 is connected to a power supply line 104 of an AC (alternating current) adapter 103 via an external power supply terminal 102, thereby enabling supply of DC power from a commercial power supply (not shown). ing.

  In addition, a smart battery 105 is detachably attached to a part of a housing (not shown) such as the back surface of the notebook computer 101. The smart battery 105 has a power supply line 106 connected to a charging circuit 108 in the notebook computer 101 via a charging connector 107, so that the smart battery 105 is supplied with DC power and charged when necessary. Furthermore, the smart battery 105 is connected to an SMBus (System Management Bus) 109 as a general-purpose communication bus between devices (chips) via a connector (not shown), and exchanges information with the notebook computer 101 to supply power. Monitoring is performed.

  Inside the notebook computer 101 is disposed a main board 111 on which main circuit components (not shown) constituting the computer are mounted. In FIG. 7, a main board 111 and a power-related circuit for supplying power to the main board 111 and controlling the power are shown as the inside of the notebook computer 101. In addition to the charging circuit 108, the power supply related circuit includes a power supply voltage detection resistor 112, first and second discharge control FETs (Field effect transistors) 113 and 114, a battery charger IC (integrated circuit) 115, an embedded controller (Embedded Controller). ) 116, constant power control circuit 117, power supply circuit 118, and power supply FET 119. The embedded controller 116, the smart battery 105, and the battery charger IC are connected by SMBus, and the embedded controller 116 and the main board 111 are connected by an LPC (low pin count) 121. The built-in controller 116 and the constant power control circuit 117 are connected by a constant power control line 122.

  Here, the charging circuit 108 constitutes a DC (Direct Current) -DC converter for charging the smart battery 105 connected to the charging connector 107. The charging circuit 108 is supplied with power for charging when the second discharge control FET 114 is turned on by gate control by the battery charger IC 115. The DC voltage supplied from the AC adapter 103 is switched by a pair of FETs 123 and 124 under the control of the battery charger IC 115, smoothed by a smoothing circuit constituted by a coil 125 and a capacitor 126, and passed through a charging connector 107. Then, a specified voltage is applied to the smart battery 105.

  Here, the battery charger IC 115 is connected to the other end of the power supply voltage detection resistor 112 having one end connected to the line connecting the external power supply terminal 102 and the first discharge control FET 113, and the AC adapter 103 is connected to a commercial power supply (not shown). This is detected when connected. The battery charger IC 115 controls the gate of the first discharge control FET 113 to turn on the first discharge control FET 113 and supply power to the power supply circuit 118.

  When the AC adapter 103 is disconnected from the external power supply terminal 102 or the power supply from the commercial power supply is turned off, the battery charger IC 115 controls the gate of the first discharge control FET 113 to turn off the first discharge control FET 113. . In this state, the gate of the second discharge control FET 114 is controlled to turn on the second discharge control FET 113. Thus, the power supply line 128 subsequent to the first discharge control FET 113 is activated from the smart battery 105 via the charging connector 107 and the second discharge control FET 114 in a state where the commercial power source cannot be used. As a result, DC power is supplied to the power supply circuit 118.

  The built-in controller 116 arranged in the notebook computer 101 is configured by a microcomputer for control, and is connected to the battery charger IC 115 and a gas gauge IC in the smart battery 105 described later by the SMBus 109. As a result, the battery charger IC 115 and the built-in controller 116 can read data such as the remaining battery level, current, voltage, and temperature from the gas gauge IC.

  FIG. 8 shows the configuration of the constant power control circuit in the present embodiment. This will be described with reference to FIG.

  The constant power control circuit 117 is a circuit that controls the maximum value of the power supplied to the main board 111 to a constant value. In a normal notebook computer, the maximum value of power is set to one value from the start of activation until the start of the computer so that no overcurrent flows from the AC adapter 103 or the smart battery 105 to the main board 111.

Constant power control circuit 117 of this embodiment, the control microcomputer 131 is connected to the constant power control line 122, to the control signal lines 132 ₁ to 132 _M of the first to M of the control microcomputer 131 First to Mth transistors 133 _{1 to} 133 _M having gates connected thereto are provided. The first to Mth transistors 133 _{1 to} 133 _M are grounded via corresponding ones of the _{first to} Mth resistors 134 _{1 to} 134 _M. The collectors of the _{first to} Mth transistors 133 _{1 to} 133 _M are commonly connected to the power supply line 128.

In the constant power control circuit 117 having such a configuration, the first to Mth transistors 133 _{1 to} 133 _M constitute a part of the power supply circuit 118, and the first to Mth transistors 133 _{1 to} 133 _M The current flowing through each collector is a current flowing from the power supply circuit 118 to the power supply FET 119. The embedded controller 116 transmits an activation signal of the notebook computer 101 to the control microcomputer 131 through the constant power control line 122. When receiving the activation signal of the notebook computer 101, the control microcomputer 131 starts counting a clock signal (not shown). Then, every time the count value of the clock signal reaches any one of predetermined M positive values, a control signal for turning on the gate in ascending order of the _first to Mth control signal lines 132 _{1 to} 132 _M is generated. Supply. As a result, the _{first to} Mth transistors 133 _{1 to} 133 _M are sequentially turned on immediately after the notebook computer 101 is started, and the maximum values of the currents flowing between these collectors and emitters are sequentially increased. Thus, constant power control corresponding to these is performed. Instead of the above control, the embedded controller 116 instructs the constant power control circuit 117 through the constant power control line 122 as to the number of the _{first to} Mth transistors 133 _{1 to} 133 _M to be turned on. Also good.

  FIG. 9 shows a circuit configuration of the smart battery. The smart battery 105 includes a battery cell 141, a protection IC 142, a gas gauge IC 143, a thermistor 144, a charge / discharge control circuit 145, and a current detection resistor 146. Here, the battery cell 141 is formed by connecting a plurality of lithium batteries in series. The terminal voltage for each cell of the lithium battery is individually input to the protection IC 142 and monitored so as not to exceed a specified voltage value. In addition, a current detection resistor 146 is connected to the battery cell 141 in series, and monitoring is performed so that the current flowing through the battery cell 141 does not exceed a predetermined upper limit value.

  The gas gauge IC 143 is a dedicated IC that manages battery information such as the remaining amount, current, voltage, and temperature of the battery composed of the battery cells 141. The gas gauge IC 143 is connected to the thermistor 144 in order to detect the temperature in the smart battery 105. Further, the gas gauge IC 143 exchanges necessary information with the protection IC 142.

  The charge / discharge control circuit 145 includes a series circuit of a charge FET 151 and a discharge FET 152 that connect between the positive terminal of the battery cell 141 and the power supply line 106, a charge diode 153 that is connected in parallel to the charge FET 151, and a discharge A discharge diode 154 connected in parallel to the FET 152; first and second resistors 155, 156 having one end connected to the positive terminal of the battery cell 141 and the other end connected to a separate terminal of the protection IC 142; The discharge FET 152 includes a third resistor 157 having one end connected to the gate of the discharge FET 152 and the other end connected to the other terminal of the protection IC 142. The gate of the charging FET 151 is connected to the other end side of the second resistor 156.

  The charge / discharge control circuit 145 configured as described above turns off the charging FET 151 when the protection IC 142 detects an abnormality in charging of the battery cell 141, and turns off the discharging FET 152 when an abnormality in discharge is detected. Alternatively, the discharge is stopped. A control signal 148 is transmitted and received between the protection IC 142 and the gas gauge IC 143. As the control signal 148, the gas gauge IC 143 monitors a signal for stopping the charge / discharge of the charge / discharge control circuit 145 when an error such as a temperature abnormality is detected in the gas gauge IC 143, or the content of the error generated in the protection IC 142. The signal to do is typical.

  FIG. 10 shows how the maximum current value is controlled when the notebook computer is activated in the battery control system configured as described above. This will be described with reference to FIGS.

  When a power button (not shown) of the notebook computer 101 is pressed (step S201: Y), this is detected by software and the embedded controller 116 is activated (step S202). At this time, the power supply FET 119 is off, and no current flows through the main board 111. The power consumption of the embedded controller 116 is very small and is generally about several tens of mA. For this reason, even if the notebook computer 101 is in a low temperature environment at this time, the influence of the load on the smart battery 105 is small, and a voltage drop hardly occurs.

  When the embedded controller 116 is activated, the gas gauge IC 143 measures the internal temperature of the smart battery 105 using the thermistor 144 and sends it to the SMBus 109 as battery information. The embedded controller 116 reads the internal temperature of the smart battery 105 (step S203) and determines whether this is less than 0 ° (step S204).

If the internal temperature of the smart battery 105 is 0 ° or more (N), even if the battery cell 141 is discharged, the voltage drop does not increase remarkably, and the operation time of the smart battery 105 is shortened. Is unlikely to occur. Therefore, the embedded controller 116 sends a signal to turn on all the transistors 133 ₁ to 133 _M of the first to M to the constant power control circuit 117, to allow the supply of electric power, for example, current values of up to 1000mA Then, the power supply FET 119 is turned on (step S205). As a result, normal power supply to the main board 111 is started.

  On the other hand, when the internal temperature T of the smart battery 105 is less than 0 ° (step S204: Y), the gas gauge IC 143 detects a voltage drop (Δv / Δt) per hour accompanying discharge of the battery cell 141 for several seconds. (Step S206) If the detection time is within 30 minutes after turning on the power button (Step S207: Y), whether the value of the voltage drop obtained by the calculation is equal to or less than a predetermined threshold value. A check is made (step S208). Here, the threshold value is determined in advance by measuring the discharge curve of the smart battery 105 to be used by changing the discharge rate and environmental temperature conditions.

  If the value of the voltage drop at that time exceeds the threshold (step S208: N), the process returns to step S206 again and the voltage drop amount is detected again for several seconds. If such a situation occurs, for example, that exceeds a specified time of 30 minutes from the power-on operation (step S207: N), error processing is performed assuming that some abnormality has occurred (step S209). ), And the entire process ends (END). Here, as error processing in step S209, an error notification LED (light-emitting diode) (not shown) is turned on or a buzzer (not shown) is also sounded to notify the user of an abnormality in starting the notebook computer 101. It will be.

If the voltage drop value is equal to or less than a predetermined threshold without exceeding the specified time (step S207: Y, step S208: Y), the first to Mth transistors 133 ₁ constituting the constant power control circuit 117 are displayed. The device with the youngest number among the devices that are turned off among -133 _M is turned on (step S210). If all of the _{first to} Mth transistors 133 _{1 to} 133 _M are not turned on at that time (step S211: N), the process returns to step S206, and the voltage drop (Δv / Δt) is again counted. Detect for seconds.

As a result, if the voltage drop (Δv / Δt) is not less than or equal to the threshold value, the process waits until then (step S208: N). If the voltage drop (Δv / Δt) is equal to or less than the threshold value (Y), the next lowest numbered device among the _{first to} Mth transistors 133 _{1 to} 133 _M that is turned off is turned on. (Step S210). In this way, the maximum value of the load current supplied from the power supply FET 119 to the main board 111 is increased step by step.

Once this way all of the transistors 133 ₁ to 133 _M up transistor 133 _M of the M is on (step S211: Y), to detect a few seconds again voltage drop (Delta] v / Delta] t) (step S212) A final check is performed to determine whether the value is equal to or less than the threshold value (step S213). As a result, if the voltage drop (Δv / Δt) is equal to or less than the threshold value (Y), the state where the current value with respect to the load is the maximum is determined, and a series of constant power control ends (end). When the voltage drop (Δv / Δt) exceeds the threshold (step S213: N), error processing is performed (step S209), and a series of processing ends (end).

  FIG. 11 shows a temporal change in the load current value for the entire apparatus when the notebook computer is started at a temperature of 0 ° or less. In this figure, the vertical axis indicates the magnitude of the load current of the smart battery 105 shown in FIG. 7 in milliamperes, and the horizontal axis indicates the change with time since the start of the notebook computer 101. It is. This will be described with reference to FIGS.

Time t ₀ represents the time when the embedded controller 116 is activated in step S202 described with reference to FIG. At this time, since the power supply FET 119 is off, power supply to the main board 111 is not started, but a current of about several tens of mA flows from the smart battery 105 to the embedded controller 116.

After that, at time t ₁ , the first transistor 133 ₁ is turned on in step S210. Thus, the supply of power to the main board 111 is started so that the maximum value of the current supplied from the power circuit 118 to the main board 111 is 100 mA under the control of the constant power control circuit 117. Thereafter, the _{second to} Mth transistors 133 _{2 to} 133 _M are sequentially turned on at times t _{2 to} t _M while confirming that the voltage drop (Δv / Δt) is equal to or less than the threshold value. . In FIG. 11, the numerical value M is “10” as an example. In this case, when all the _ten transistors 133 _{1 to} 133 ₁₀ are turned on, the normal constant power control is started.

Of course, if the internal temperature T of the smart battery 105 at the time of starting the notebook computer 101 is not less than 0 ° in step S204 of FIG. 10 (N), the first to Mth transistors 133 _{1 to} 133 _M Are turned on at the same time, and the power supply FET 119 is also turned on (step S205). Therefore, in this case, normal constant power control is immediately performed without performing control for sequentially increasing the load current value as shown in FIG.

  In the present embodiment, when the internal temperature T of the smart battery 105 is less than 0 ° in step S204 of FIG. 10, the current flowing through the main board 111 is changed in 10 steps from 100 mA to 1000 mA. However, it is not limited to this. It is necessary to determine the discharge characteristics of the battery cell 141 (FIG. 9) to be used and the specifications for the environmental temperature of the smart battery 105. Although the time for detecting an error in step S209 is 30 minutes, it is a matter of course that this may be changed to another time.

  According to the present embodiment described above, since it is confirmed that the voltage drop of the smart battery 105 is equal to or lower than a predetermined threshold from the time when the notebook computer 101 is activated, the risk of shutdown that occurs during the activation of the device is reduced. Can be reduced.

  In the present embodiment, the startup process is performed in a state where the voltage drop of the smart battery 105 is small. Therefore, the usage time of the smart battery 105 after starting up the notebook computer 101 is prolonged. Further, since the smart battery 105 can be activated in an optimum state even in a low temperature environment, the battery cell 141 is less deteriorated and the life can be kept long.

  <Deformability of invention>

  In the embodiment described above, the magnitude of the load current of the smart battery 105 with respect to the notebook computer 101 is controlled so as to increase stepwise at low temperature startup. In this control, the circuit or device constituting the notebook computer 101 is not specified, and the control is performed to increase the load current with the passage of time.

  In the modification of the present invention, the circuits and devices constituting the notebook computer 101 are classified into several groups, and the battery voltage drop (Δv / Δt) is kept below the threshold with the passage of time from the start-up. In this way, the circuit devices to be supplied with power are expanded in groups.

  In this modification, various circuit devices of the notebook computer 101 picked up in the previous embodiment are classified into the following four groups.

First group: embedded controller 116
Second group: CPU and hard disk (not shown) on the main board 111 and various LED display elements Third group: Backlight of a liquid crystal display (not shown) connected from the main board 111 via a connector (not shown) Fourth group : Audio-related circuits and communication-related circuit devices incorporated in the main board 111

  Here, the circuit device of the second group is necessary when starting up the OS (operating system) of the notebook computer 101 on the main board 111, and the third group requires a certain amount of OS startup for normal users. Circuit devices that will be in time after progress are targeted. The fourth group is for circuit devices that are required after the start of the OS at the final stage. Devices that are activated by activation of the application software after the activation of the OS may be classified as a fourth group or as a fifth group of circuit devices placed in an operation state after this. For example, a USB (Universal Serial Bus) connected device such as video capture corresponds to this.

  FIG. 12 shows an example of a change in load current from the start of the notebook computer in the low temperature environment of this modification. Here, the circuit devices used in the notebook computer 101 are classified into four groups from the first group to the fourth group. This will be described with reference to FIG.

When a power button (not shown) of the notebook computer 101 is pressed at time t ₁₁ , supply of power to the embedded controller 116 is started from that time. It is assumed that the temperature of the smart battery 105 is detected in this state, and this is a low temperature, for example, less than 0 °.

In this case, the time t ₁₂ after the determination of the temperature is performed, a second group connection switch (not shown) is turned on, the supply of power to the CPU and the hard disk (not shown) of the notebook computer 101 is started The In this state, the CPU checks whether the voltage drop (Δv / Δt) of the smart battery 105 is below a predetermined threshold. If it is not less than the predetermined threshold, it waits until it is less than the threshold. However, when the standby time exceeds a predetermined maximum time, an error display is performed and the notebook computer 101 is terminated.

On the other hand, the voltage drop of the smart battery 105 before it reaches the maximum time wait time is predetermined (Δv / Δt) is equal to or less than a predetermined threshold value, CPU in the time t _13, for a third group connected (not shown) Turn on the switch. As a result, the backlight of the liquid crystal display starts to turn on. In this state, the CPU checks whether the voltage drop (Δv / Δt) of the smart battery 105 is below a predetermined threshold. If it is not less than the predetermined threshold, it waits until it is less than the threshold. However, when the standby time exceeds a predetermined maximum time, an error display is performed and the notebook computer 101 is terminated.

On the other hand, the voltage drop of the smart battery 105 (Δv / Δt) is equal to or less than a predetermined threshold value before reaching the maximum time wait time is predetermined, CPU in the time t _14, for the fourth group connection (not shown) Turn on the switch. As a result, power is supplied to audio-related circuits and communication-related circuit devices. In this state, the CPU checks whether the voltage drop (Δv / Δt) of the smart battery 105 is equal to or less than a predetermined threshold value. If it is not less than the predetermined threshold, it waits until it is less than the threshold. However, when the standby time exceeds a predetermined maximum time, an error display is performed and the notebook computer 101 is terminated.

On the other hand, if the voltage drop (Δv / Δt) of the smart battery 105 falls below a predetermined threshold before the predetermined maximum time has elapsed, control for normal power supply is performed thereafter. Will be done. Variation of the time t ₁₄ after the load current is due to variations in the power consumption of each circuit device CPU or a hard disk.

  Unlike the case shown in FIG. 12, when the smart battery 105 is higher than a predetermined temperature such as 0 °, the circuit devices of the second group to the fourth group normally supply power to the smart battery 105 from the beginning. It is natural to be a target. However, as for an audio circuit device that does not require power supply immediately after start-up, the power supply timing may of course be delayed from the viewpoint of power saving.

  According to the modification described above, the power supply timing is set for each group while checking the voltage drop of the smart battery 105. As a result, sufficient power is supplied to the corresponding circuit device from the start of power supply, and there is no problem that the corresponding circuit device may take time to start up although power is consumed.

  In the embodiment and the modification, the smart battery 105 using the battery cell 141 or the gas gauge IC 143 using the lithium battery has been described as an example, but the present invention is not limited to this, and the present invention is applied to other batteries. Can be applied. In the embodiment and the modification, the battery management has been described by taking the notebook computer 101 as an example. However, the present invention can be similarly applied to various information processing apparatuses using a battery.

  In the embodiment and the modification, the temperature detecting element is used on the battery side. However, when the temperature detecting element is arranged on the computer main body side, it can be used for detecting the temperature at the start-up. is there. Further, in the embodiment and the modification, the smart battery 105 is controlled at a low temperature at 0 °, but the temperature that becomes the control boundary is naturally not limited to this due to the characteristics of the battery. is there. Furthermore, in the embodiment, the timer operation is performed by the clock count operation, but the present invention is not limited to this. Needless to say, the timer can be configured in a circuit using a circuit component such as a capacitor.

  Some or all of the embodiments described above are described as in the following supplementary notes, but are not limited to the following descriptions.

(Appendix 1)
Temperature detecting means for detecting the temperature at the time of starting the device;
A battery for supplying power to various components constituting the apparatus;
A constant power control circuit for performing constant power control of all the various components constituting the device such that the power consumption of the device is equal to or less than a specific upper limit value using the battery;
When the temperature detecting means detects a temperature lower than a predetermined temperature at the time of starting the apparatus, the current value flowing through the various components is set to a predetermined initial current value, and a voltage drop amount per unit time is determined in advance. A comparison means for comparing with a threshold value,
Current increasing means for increasing the current flowing through the constant power control circuit by one step when the comparison result of the comparing means is less than or equal to the threshold;
Reversing means for reversing the comparison processing by the comparison means and the one-step increase in current by the current increasing means until the increase in current by the current increasing means reaches a predetermined value;
Current limit release means for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive means;
When the temperature detecting means detects a predetermined temperature or higher at the time of starting the device, the device is configured without limiting the current flowing through the various components using the constant power control circuit from the time of starting the device. A battery control system comprising: normal temperature control means for controlling power consumption of all the various components.

(Appendix 2)
Temperature detecting means for detecting the temperature at the time of starting the device;
A battery for supplying power to various components constituting the apparatus;
Voltage drop amount determining means for determining whether the voltage drop amount with respect to the power consumption of the battery is equal to or less than a predetermined threshold;
Start of power supply of each group when the various parts constituting the device are classified into a plurality of groups in time series based on the possibility of time lag in the start of power supply from the time of starting the device Switch means for individually controllable,
A start time control means for starting power supply by the battery from a part of a group first classified in time series when the apparatus is activated when the temperature detection means detects a temperature below a predetermined temperature;
After the start-up control means starts supplying power to the components of one group, the voltage drop amount determination means waits to determine that the voltage drop amount with respect to the battery power consumption is equal to or less than the threshold value. Group-specific power supply start control means for controlling the timing of power supply start to the last group for each group,
A battery control system, comprising: constant power control means for performing constant power control of power consumption of all parts of all groups from the time of starting the apparatus when the temperature detection means detects a predetermined temperature or higher.

(Appendix 3)
The battery control system according to appendix 1 or appendix 2, wherein the battery is a smart battery.

(Appendix 4)
The battery control system according to supplementary note 3, wherein the battery is constituted by a battery cell using lithium ions.

(Appendix 5)
The battery control system according to supplementary note 3, wherein the battery is constituted by a battery cell made of nickel metal hydride.

(Appendix 6)
The repetitive means includes error processing means for stopping the repetitive processing and issuing a warning when the time until the current increase by the current increasing means reaches a predetermined value exceeds a predetermined time. The battery control system according to supplementary note 1, which is characterized.

(Appendix 7)
A temperature detection step for detecting the temperature at the start of the device;
In this temperature detection step, when a temperature lower than a predetermined specific temperature is detected as the temperature at the time of starting the device, the current value flowing from the battery to various components constituting the device is set to a predetermined initial current value, and per unit time A comparison step for comparing the voltage drop amount of
A current increasing step for increasing the current flowing from the battery by one step when the comparison result of the comparing step is equal to or less than the threshold;
A recursion step of reversing the comparison process by the comparison step and the one-step increase process of the current by the current increase step until the current increase by the current increase step reaches a predetermined value;
A current limit release step for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive step;
When the temperature detection step detects a temperature higher than a predetermined temperature at the time of starting the device, the current flowing through the various components is increased step by step using the repetitive step from the time of starting the device, thereby gradually limiting the current. And a normal temperature control step for constant power control of the power consumption of all the components constituting the apparatus without being released.

(Appendix 8)
A temperature detection step for detecting the temperature at the start of the device;
When a temperature below a predetermined temperature is detected in this temperature detection step, a plurality of components constituting the device are selected based on the possibility of a time lag in the start of power supply by the battery from the time of starting the device. A start time control step of starting power supply by the battery from the parts of the group first classified when time grouped into
After the power supply to the components of one group starts, the timing for starting the power supply is sequentially controlled for each group until the voltage drop amount of the battery falls below a predetermined threshold value. A power supply start control step for each group;
A battery control method comprising: a constant power control step of performing constant power control of power consumption of all parts of all groups when the apparatus is activated when a temperature above a predetermined temperature is detected in the temperature detection step.

(Appendix 9)
A time measurement step for measuring a time until an increase in current due to the current increase step reaches a predetermined value;
The battery control method according to claim 7, further comprising an error warning step of stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement step.

(Appendix 10)
A time measurement step of measuring a time until a voltage drop amount of the battery is equal to or less than a predetermined threshold in the group-by-group power supply start control step;
9. The battery control method according to claim 8, further comprising an error warning step of stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement step.

(Appendix 11)
On the computer,
Temperature detection processing to detect the temperature at the time of device startup;
In this temperature detection process, when a temperature lower than a predetermined temperature is detected as a temperature at the time of starting the device, the current value flowing from the battery to various components constituting the device is set to a predetermined initial current value per unit time. A comparison process for comparing the voltage drop amount of the current with a predetermined threshold;
A current increase process for increasing the current flowing from the battery by one step when the comparison result of the comparison process is equal to or less than the threshold;
A reversal process for reversing the comparison by the comparison process and the one-step increase process of the current by the current increase process until the current increase by the current increase process reaches a predetermined value;
Current limit release processing for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive processing;
When a temperature higher than a predetermined temperature is detected by the temperature detection process at the time of starting the device, the current flowing through the various components is increased stepwise by using the repetitive processing from the time of starting the device, thereby gradually limiting the current. A battery control program for executing a normal temperature control process for constant power control of the power consumption of all the various components constituting the apparatus without being released.

(Appendix 12)
On the computer,
Temperature detection processing to detect the temperature at the time of device startup;
When a temperature lower than a predetermined temperature is detected in this temperature detection process, a plurality of various components constituting the device are selected based on the possibility of a time lag in the start of power supply by the battery from the time of starting the device. A control process at the time of starting power supply from the battery from the parts of the group first classified when time-classified into the group of
After the power supply to the components of one group starts, the timing for starting the power supply is sequentially controlled for each group until the voltage drop amount of the battery falls below a predetermined threshold value. Power supply start control processing by group,
A battery control program for executing a constant power control process for performing constant power control on power consumption of all parts of all groups when the apparatus is activated when a temperature equal to or higher than a predetermined temperature is detected in the temperature detection process.

(Appendix 13)
A time measurement process for measuring a time until an increase in current due to the current increase process reaches a predetermined value; and
The battery control according to appendix 11, further comprising: causing the computer to further execute an error warning process for stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement process. program.

(Appendix 14)
A time measurement process for measuring a time until a voltage drop amount of the battery is equal to or less than a predetermined threshold in the group-specific power supply start control process;
14. The battery control according to appendix 13, wherein when the time exceeding the predetermined allowable time is measured in the time measurement process, the time control is stopped and an error warning process for issuing a warning is further executed by the computer. program.

DESCRIPTION OF SYMBOLS 10, 20, 100 Battery control system 11, 21 Temperature detection means 12, 22 Battery 13, 117 Constant power control circuit 14 Comparison means 15 Current increase means 16 Recoil means 17 Current limit release means 18 Normal temperature control means 23 Voltage drop amount Discriminating means 24 Switch means 25 Start time control means 26 Group power supply start control means 27 Constant power control means 30, 40 Battery control method 31, 41 Temperature detection step 32 Comparison step 33 Current increase step 34 Recoil step 35 Current limit release step 36 Control step at normal temperature 42 Control step at start 43 Power supply start control step by group 44 Constant power control step 50, 60 Battery control program 51, 61 Temperature detection process 52 Comparison process 53 Current increase process 54 Rebound process 55 Current limit release processing 56 Normal temperature control processing 62 Start control processing 63 Group-specific power supply start control processing 64 Constant power control processing 101 Notebook computer 105 Smart battery 108 Charging circuit 111 Main board 115 Battery charger IC
116 Embedded Controller 118 Power Supply Circuit 119 Power Supply FET
131 Control Microcomputer 132 Control Signal Line 141 Battery Cell 142 Protection IC
143 Gas Gauge IC
144 Thermistor

Claims (10)

Temperature detecting means for detecting the temperature at the time of starting the device;
A battery for supplying power to various components constituting the apparatus;
A constant power control circuit for performing constant power control of all the various components constituting the device such that the power consumption of the device is equal to or less than a specific upper limit value using the battery;
When the temperature detecting means detects a temperature lower than a predetermined temperature at the time of starting the apparatus, the current value flowing through the various components is set to a predetermined initial current value, and a voltage drop amount per unit time is determined in advance. A comparison means for comparing with the threshold value
Current increasing means for increasing the current flowing through the constant power control circuit by one step when the comparison result of the comparing means is less than or equal to the threshold;
Reversing means for reversing the comparison processing by the comparison means and the one-step increase in current by the current increasing means until the increase in current by the current increasing means reaches a predetermined value;
Current limit release means for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive means;
When the temperature detecting means detects a predetermined temperature or higher at the time of starting the device, the device is configured without limiting the current flowing through the various components using the constant power control circuit from the time of starting the device. A normal temperature control means for controlling the power consumption of the entire various parts ,
The battery control system according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . Temperature detecting means for detecting the temperature at the time of starting the device;
A battery for supplying power to various components constituting the apparatus;
Voltage drop amount determining means for determining whether the voltage drop amount with respect to the power consumption of the battery is equal to or less than a predetermined threshold;
Start of power supply of each group when the various parts constituting the device are classified into a plurality of groups in time series based on the possibility of time lag in the start of power supply from the time of starting the device Switch means for individually controllable,
A start time control means for starting power supply by the battery from a part of a group first classified in time series when the apparatus is activated when the temperature detection means detects a temperature below a predetermined temperature;
After the start-up control means starts supplying power to the components of one group, the voltage drop amount determination means waits to determine that the voltage drop amount with respect to the battery power consumption is equal to or less than the threshold value. Group-specific power supply start control means for controlling the timing of power supply start to the last group for each group,
A constant power control means for performing constant power control of the power consumption of all parts of all groups when the temperature detection means detects a predetermined temperature or higher from the start of the device ;
The battery control system according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . A temperature detection step for detecting the temperature at the start of the device;
In this temperature detection step, when a temperature lower than a predetermined specific temperature is detected as the temperature at the time of starting the device, the current value flowing from the battery to various components constituting the device is set to a predetermined initial current value, and per unit time A comparison step for comparing the voltage drop amount of
A current increasing step for increasing the current flowing from the battery by one step when the comparison result of the comparing step is equal to or less than the threshold;
A recursion step of reversing the comparison process by the comparison step and the one-step increase process of the current by the current increase step until the current increase by the current increase step reaches a predetermined value;
A current limit release step for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive step;
When the temperature detection step detects a temperature higher than a predetermined temperature at the time of starting the device, the current flowing through the various components is increased step by step using the repetitive step from the time of starting the device, thereby gradually limiting the current. Without changing to a normal temperature control step for constant power control of the power consumption of all the various parts constituting the device ,
The battery control method according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . A temperature detection step for detecting the temperature at the start of the device;
When a temperature below a predetermined temperature is detected in this temperature detection step, a plurality of components constituting the device are selected based on the possibility of a time lag in the start of power supply by the battery from the time of starting the device. A start time control step of starting power supply by the battery from the parts of the group first classified when time grouped into
After the power supply to the components of one group starts, the timing for starting the power supply is sequentially controlled for each group until the voltage drop amount of the battery falls below a predetermined threshold value. A power supply start control step for each group;
A constant power control step of performing constant power control of the power consumption of all the components of all groups from the start of the apparatus when a temperature above a predetermined temperature is detected in the temperature detection step ,
The battery control method according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . A time measurement step for measuring a time until an increase in current due to the current increase step reaches a predetermined value;
4. The battery control method according to claim 3, further comprising an error warning step of stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement step. A time measurement step of measuring a time until a voltage drop amount of the battery is equal to or less than a predetermined threshold in the group-by-group power supply start control step;
5. The battery control method according to claim 4, further comprising an error warning step of stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement step. On the computer,
Temperature detection processing to detect the temperature at the time of device startup;
In this temperature detection process, when a temperature lower than a predetermined temperature is detected as a temperature at the time of starting the device, the current value flowing from the battery to various components constituting the device is set to a predetermined initial current value per unit time. A comparison process for comparing the voltage drop amount of the current with a predetermined threshold;
A current increase process for increasing the current flowing from the battery by one step when the comparison result of the comparison process is equal to or less than the threshold;
A reversal process for reversing the comparison by the comparison process and the one-step increase process of the current by the current increase process until the current increase by the current increase process reaches a predetermined value;
Current limit release processing for releasing the restriction of the current flowing through the various components when the increase in current reaches a predetermined value by the repetitive processing;
When a temperature higher than a predetermined temperature is detected by the temperature detection process at the time of starting the device, the current flowing through the various components is increased stepwise by using the repetitive processing from the time of starting the device, thereby gradually limiting the current. Without causing the system to perform a normal temperature control process for constant power control of the power consumption of all the various components constituting the device ,
The battery control program according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . On the computer,
Temperature detection processing to detect the temperature at the time of device startup;
When a temperature lower than a predetermined temperature is detected in this temperature detection process, a plurality of various components constituting the device are selected based on the possibility of a time lag in the start of power supply by the battery from the time of starting the device. A control process at the time of starting power supply from the battery from the parts of the group first classified when time-classified into the group of
After the power supply to the components of one group starts, the timing for starting the power supply is sequentially controlled for each group until the voltage drop amount of the battery falls below a predetermined threshold value. Power supply start control processing by group,
A constant power control process for controlling the power consumption of all the components of all the groups from the time of starting the apparatus when detecting a predetermined temperature or higher in the temperature detection process is performed ,
The battery control program according to claim 1, wherein the threshold value is determined in advance by measuring a discharge curve of the battery while changing environmental temperature conditions . A time measurement process for measuring a time until an increase in current due to the current increase process reaches a predetermined value; and
8. The battery according to claim 7, further comprising an error warning process for stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement process. Control program. A time measurement process for measuring a time until a voltage drop amount of the battery is equal to or less than a predetermined threshold in the group-specific power supply start control process;
9. The battery according to claim 8, further comprising an error warning process for stopping the time measurement and issuing a warning when a time exceeding a predetermined allowable time is measured in the time measurement process. Control program.

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