WO2023021696A1

WO2023021696A1 - Battery output control system and battery output control method

Info

Publication number: WO2023021696A1
Application number: PCT/JP2021/030621
Authority: WO
Inventors: 慧一新井
Original assignee: 本田技研工業株式会社
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2023-02-23

Abstract

This battery output control system, which controls the output of a plurality of batteries, comprises: an acquisition unit that acquires, with respect to a plurality of batteries, battery information including temperature information and battery voltage; a processing unit that generates selection information for selecting one battery to serve as an output source from among the plurality of batteries, and that generates an output control signal for controlling the output and output stoppage of each battery on the basis of the battery information; and a switching unit that switches between the output and the output stoppage of the plurality of batteries on the basis of the output control signal, and that outputs the output from each battery to a device that is driven on the basis of said outputs.

Description

Battery output control system and battery output control method

The present invention relates to a battery output control system and a battery output control method.

In Patent Document 1, the battery type is identified based on the result of comparison between a detected value corresponding to the temperature of a specific location in the battery pack and a preset constant threshold that does not depend on the characteristics of the battery. It is disclosed to perform certain temperature-related controls for charge control without the need to.

Patent No. 6416665

However, when the battery is used in addition to charge control, if the temperature of the battery rises due to discharge and the cell temperature reaches a high temperature range, the deterioration of battery performance can be greatly affected. Although there are devices equipped with multiple batteries in order to increase the capacity of the batteries to achieve long operating times, multiple batteries are used to suppress the temperature rise of each battery in order to suppress the deterioration of battery performance. There is a problem that it is necessary to control the output of the battery.

The present invention has been made in view of the above problems, and is a battery capable of controlling the output of a plurality of batteries so as to suppress the temperature rise of the batteries during discharge when using a plurality of batteries. The purpose is to provide output control technology.

A battery output control system according to one aspect of the present invention is a battery output control system that controls outputs of a plurality of batteries,
acquisition means for acquiring battery information including temperature information and battery voltages of the plurality of batteries;
processing means for generating selection information for selecting one of the plurality of batteries as an output source, and an output control signal for controlling output and output stop of each battery based on the battery information;
switching means for switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output;
The processing means, as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
The switching means is characterized in that, based on the output control signal, the plurality of batteries are switched between outputting and stopping the output, and the output from each battery is output to the device.

A battery output control method according to another aspect of the present invention is a battery output control method in a battery output control system for controlling outputs of a plurality of batteries, comprising:
an acquiring step of acquiring battery information including temperature information and battery voltages of the plurality of batteries;
a processing step of generating selection information for selecting one of the plurality of batteries as an output source, and an output control signal for controlling output and output stop of each battery based on the battery information;
a switching step of switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output;
In the processing step, as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
In the switching step, based on the output control signal, output and output stop of the plurality of batteries are switched to output the output from each battery to the device.

According to the present invention, when using a plurality of batteries, it is possible to provide a battery output control technique capable of controlling the outputs of the plurality of batteries so as to suppress the temperature rise of the batteries during discharge. . As a result, deterioration in performance of the battery can be suppressed by suppressing an increase in temperature of the battery during discharging.

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar configurations are given the same reference numerals.

1 is a block diagram showing the configuration of a battery output control system according to an embodiment; FIG. FIG. 2 is a block diagram showing the configuration of a battery; FIG. 2 is a block diagram showing the configuration of a battery output control device; The figure explaining the flow of a battery output control process. The figure which shows the output of a battery typically. The figure which shows typically the output of a battery, and the change of temperature information.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more of the features described in the embodiments may be combined arbitrarily. Also, the same or similar configurations are denoted by the same reference numerals, and redundant explanations are omitted.

(Battery output control system)
FIG. 1 is a block diagram showing the configuration of a battery output control system 1 according to an embodiment. A battery output control system 1 for controlling outputs of a plurality of batteries includes a battery unit 60 having a plurality of

batteries

6A, 6B, . 10 (device equipment).

Here, the device 10 includes, for example, working machines such as lawn mowers, cultivators, and snowplows, disaster response storage batteries, residential storage batteries, ground hardening machines, electric motorcycles such as electric scooters, electric vehicles, and hybrid vehicles.

Although two

batteries

6A and 6B are illustrated in the battery unit 60 in the example shown in FIG. 1, the battery unit 60 is not limited to this example and can be configured with two or more batteries. In the following description, the

batteries

6A, 6B, .

Each

battery

6A, 6B, . . . is provided with an information communication device 40 (telematics control unit: TCU) capable of communicating with the battery output control device 20 via a wireless network 27 (FIG. 3). The information communication unit 40 (TCU) can perform signal processing for communicating with the battery output control unit 20 of the device 10 via the network. The information communication device 40 (TCU) transmits the information acquired from each

battery

6A, 6B to the battery output control device 20 via the wireless network 27. FIG.

The device 10 includes a battery output control device 20, and the CPU 22 (processing unit) of the battery output control device 20 includes battery information (e.g., battery voltage, temperature information, etc.) acquired from each

battery

6A, 6B . ), a signal (output control signal) for controlling the output and output stop of each battery is generated.

The switcher 30 switches between outputting and stopping the output of the plurality of batteries based on the output control signal, and outputs the output from each battery to the device 10 driven based on the output. The switch 30, for example, causes one of the

batteries

6A and 6B to output (for example, the battery 6A) and stops the output from the other battery (for example, the battery 6B).

Also, the switch 30, for example, causes the other battery (for example, the battery 6B) of the plurality of

batteries

6A and 6B to output, and stops the output from one battery (for example, the battery 6A). That is, the switch 30 alternates between the output from one battery and the output stop state of the other battery, and the output from the other battery and the output stop state of the one battery based on the output control signal. switch to

The switch 30 outputs power from one of the plurality of

batteries

6A and 6B to the device 10 (device apparatus). In the example shown in FIG. 1 , the switch 30 is provided outside the battery output control device 20 , but the switch 30 may be provided inside the battery output control device 20 .

The CPU 22 ( FIG. 3 ) of the battery output control device 20 sets the cycle time for controlling the output and output stop of each

battery

6A, 6B based on the battery voltage included in the battery information acquired from the battery 6 . Here, FIG. 5 is a diagram schematically showing the output of the battery. In FIG. 5, an output pattern 501 indicates a case where the battery voltage is equal to or higher than a predetermined value (V _high ), and an output pattern 502 indicates a case where the battery voltage is less than the predetermined value (V _low ).

In FIG. 5, the horizontal axis indicates time t, and the vertical axis indicates current I. If the power output from each

battery

6A, 6B is power P, current I in output pattern 501 is indicated by P/V _high , and current I in output pattern 502 is indicated by P/V _low . Here, the current I (average value) output from each

battery

6A, 6B is apparently shown as

current outputs

511, 512, 521, 522. FIG.

As shown in

output patterns

501 and 502, the CPU 22 controls output (ON) and output stop (OFF) from each battery based on the battery voltage (V _high , V _low ) in each

battery

6A, 6B. Set the cycle time T (T _A , T _B ).

The CPU 22 adds the pulse width τ (τ _A , τ _B : time width) indicating the duration of the output (ON) state from each battery to the temperature information included in the battery information acquired from each

battery

6A, 6B. decision based on The CPU 22 determines, as a pulse width, the time from the start of output from each battery to the time when the temperature information reaches a predetermined temperature information threshold value or more.

In switching the outputs of the

batteries

6A and 6B, the CPU 22 sets the time (delay time: _τdelay ) required to stabilize the output from the batteries. The CPU 22 can control the setting of the delay times. For example, the CPU 22 can set the delay times τ _{delay_A} and τ _{delay_B} based on the battery voltages (V _high , V _low ) of the batteries 6A and 6B. is possible. For example, the delay time corresponding to the battery voltage may be stored in the ROM 24 in advance, and the CPU 22 may refer to the ROM 24 to set the delay time corresponding to the battery voltage.

Further, the CPU 22 _sets a delay time τdelay_A, which is a predetermined ratio (ratio) to the pulse width τ( _τA , _τB ) based on the pulse width τ( _τA , _τB ) in each of the

batteries

6A, 6B. It can also be set as τ _{delay_B} .

Alternatively, the CPU 22 sets a delay time, which is set according to the ratio (proportion) between the pulse width τ (τ _A , τ _B ) and the cycle time T (T _A , _TB ) in each of the

batteries

6A, 6B. It is also possible to set τ _{delay_A} and τ _{delay_B} .

FIG. 6 is a diagram schematically showing changes in battery output and temperature information. As in FIG. 5, an output pattern 601 indicates a case where the battery voltage is equal to or higher than a predetermined value (V _high ), and an output pattern 602 indicates a case where the battery voltage is less than the predetermined value (V _low ). In FIG. 6, the horizontal axis indicates time t, and the vertical axis indicates current I. The temperature information of each

battery

6A, 6B is shown as

temperature information

611, 612, 621, 622, respectively.

Based on the temperature information, the CPU 22 (FIG. 3) of the battery output control device 20 calculates the temperature information of each

battery

6A, 6B, . Alternatively, the temperature rise value (difference in temperature) from when the output is opened is monitored, and it is determined whether or not the temperature information of the battery during output has reached a predetermined temperature information threshold value Th (Th_A, Th_B). do. The CPU 22 determines the pulse width τ (τ _A , τ _B ) indicating the duration of the output (ON) state at the timing when the temperature information becomes equal to or higher than the threshold Th (Th_A, Th_B). Set the delay time τ _delay (τ _{delay_A} , τ _{delay_B} ).

At the timing of the threshold arrival time when the temperature information of one battery being output becomes equal to or greater than the threshold of the predetermined temperature information, the CPU 22 causes the other battery whose output is stopped to output the temperature information to a delay time delayed from the threshold arrival time. Continue to output from one battery until it is reached.

Also, the CPU 22 stops the output from one battery during output at the timing of reaching the delay time delayed from the threshold reaching time. The CPU 22 generates, as the output control signal, a signal for controlling the output and output stop of each battery as described above.

In the case of the output pattern 601, the CPU 22 of the battery output control device 20, at the timing (threshold reaching time) when the temperature information 611 of the battery being output (for example, the battery 6A) becomes equal to or greater than the predetermined temperature information threshold Th_A, Output is made from the other battery (for example, battery 6B), and output from one battery is continued until a delay time delayed from the threshold reaching time is reached.

In addition, the CPU 22 generates an output control signal for controlling the output and output stop of each battery so as to stop the output from the battery 6A during output at the timing of reaching the delay time τ _{delay_A} delayed from the threshold reaching time. do. Outputs from the plurality of batteries controlled based on the output control signal are duplicated during the delay time. By overlapping the outputs from multiple batteries for a delay time, it is possible to provide a continuous supply of battery outputs (voltage and current).

The same is true for the battery 6B, and the CPU 22 controls the timing (threshold reaching time) when the temperature information 612 of the battery being output (for example, the battery 6B) becomes equal to or greater than the predetermined temperature information threshold Th_B, and the other battery (for example, , battery 6A), and the output from one battery 6B is continued until a delay time delayed from the threshold reaching time is reached.

In addition, the CPU 22 generates an output control signal for controlling the output and output stop of each battery so as to stop the output from the battery 6B during output at the timing of reaching the delay time _{τdelay_B} delayed from the threshold reaching time. do.

The same applies to the output pattern 602. At the timing (threshold reaching time) when the

temperature information

621, 622 of the

batteries

6A, 6B becomes equal to or greater than the predetermined temperature information threshold Th, the output (ON) pulse width τ ( τ _A , τ _B ) are determined, and a delay time τ _delay (τ _{delay_A} , τ _{delay_B} ) delayed from the threshold arrival time is set.

Then, the CPU 22 of the battery output control device 20, at the timing (threshold reaching time) when the temperature information 621 of the battery being output (for example, the battery 6A) becomes equal to or higher than the predetermined temperature information threshold, the other battery (for example, The output from the battery 6B) is continued until the delay time delayed from the threshold reaching time is reached.

In addition, the CPU 22 generates an output control signal for controlling the output and output stop of each battery so as to stop the output from the battery 6A during output at the timing of reaching the delay time τ _{delay_A} delayed from the threshold reaching time. do.

Similarly, the CPU 22 causes the other battery (eg, battery 6A) to output temperature information 622 from the other battery (eg, battery 6A) when the temperature information 622 of the battery being output (eg, battery 6B) reaches or exceeds a predetermined temperature information threshold (threshold reaching time). , the output from the battery 6B is continued until the delay time delayed from the threshold arrival time is reached. In addition, the CPU 22 generates an output control signal for controlling the output and output stop of each battery so as to stop the output from the battery 6B during output at the timing of reaching the delay time _{τdelay_B} delayed from the threshold reaching time. do.

Returning to FIG. 1, the switch 30 switches output and output stop of a plurality of batteries based on the output control signal generated by the battery output control device 20, and changes the output from each battery to the output. output to the device 10 driven based on the

For example, based on the output control signal, the switcher 30 stops the output from one of the plurality of batteries 6 (for example, the battery 6A) during output, and stops the output from the other battery (for example, the battery 6B). Switch the battery output to do the output. The switch 30 outputs power from the battery A to the device 10 before the battery output is switched, and outputs power from the switched battery B to the device 10 after the battery output is switched. do.

The switcher 30 alternately switches the battery output between the

batteries

6A and 6B based on the output control signal generated by the CPU 22 of the battery output control device 20.

Here, for the battery 6, for example, a battery that supplies power to the device 10 as a power source can be reused as a reuse battery and applied to other reuse products. A reusable battery is a rechargeable secondary battery that has been used as a power storage device. Although not suitable as a secondary battery, it refers to a secondary battery that can be reused for other purposes, and a typical example is a lithium ion battery.

(Battery configuration)
FIG. 2 is a block diagram showing the configuration of the battery 6. As shown in FIG. The battery 6 incorporates a plurality of lithium (Li) ion battery cells as battery cells 65 . As the battery 6 , a sodium ion secondary battery, a potassium ion secondary battery, or the like can be used as the battery cell 65 in addition to the lithium (Li) ion battery.

As shown in FIG. 2, the discharge voltage (output voltage), output current, cell temperature, etc. of the battery cell 65 are detected and monitored by a sensor 66 (detector). Here, the battery cell 65 is composed of n internal cells. Power P supplied from the battery cell 65 is supplied via an output I/F 64 (output interface) having an output terminal.

The CPU 61 stores various physical quantity data measured by the sensor 66 in the memory 62 (storage unit). The memory 62 includes a ROM storing a control program for operating the CPU 61 and a RAM used as a work area for executing the control program.

A communication I/F 63 (communication interface) is an interface that connects the information communication device 40 (TCU) and the battery 6, and the information communication device 40 (TCU) communicates with the memory 62 of the battery 6 and the Information acquired from the sensor 66 is transmitted to the battery output control device 20 . The information communication unit 40 (TCU) transmits the temperature information of the battery cells 65 acquired from the memory 62 and the sensor 66 of the battery 6 to the battery output control device 20 .

The temperature information includes, for example, the predetermined temperature of the battery cell 65, the temperature increase rate indicating the rate of temperature change in a predetermined period of time, or the temperature increase value (temperature difference) from when the output is disclosed. The temperature of the battery cell 65 detected by the sensor 66 is stored in the memory 62 at predetermined timings, and the CPU 61 calculates the temperature increase rate and temperature increase value (temperature difference) based on the temperature stored in the memory 62. Is possible.

Note that the temperature rise rate and the temperature rise value (temperature difference) are based on the temperature of the battery cell 65 (detection value detected by the sensor 66) obtained from each battery by the CPU 22 of the battery output control device 20, which will be described later. It is also possible to calculate a temperature rise rate and a temperature rise value (temperature difference) and use them as temperature information for the processing of the CPU 22 .

(Configuration of battery output control device 20)
FIG. 3 is a block diagram showing the configuration of the battery output control device 20. As shown in FIG. As shown in FIG. 3, the battery output control device 20 includes a CPU 22 for executing and controlling arithmetic processing in the battery output control device 20, a RAM 23, a ROM 24, a communication interface (I/F) 25, and a large-capacity storage device 26. Prepare. The battery output control device 20 generates a database (26a, 26b in FIG. 3) for storing battery information of the

batteries

6A, 6B based on the information transmitted from the information communication device 40 (TCU).

The battery output control device 20 can establish a communication link with the wireless network 27 via the communication interface 25 and communicate with the information communication device 40 via the wireless network 27 . The CPU 22 of the battery output control device 20 acquires battery information of the batteries 6 (

batteries

6A, 6B, . do.

The storage device 26 stores the information of each

battery

6A, 6B, .

Storage areas

26a and 26b are storage areas corresponding to

batteries

6A and 6B.

Although FIG. 3 illustrates a case where there are two storage areas (26a, 26b), the present invention is not limited to this example. A database storing battery information for each battery is generated based on the acquisition of information corresponding to the N number of batteries. The

storage areas

26a, 26b, . .

Next, the flow of processing executed by the battery output control system 1 configured as above will be described. FIG. 4 is a diagram for explaining the flow of battery output control processing in the battery output control system. Here, as a plurality of batteries, battery output control processing for

batteries

6A and 6B will be described as an example.

As shown in FIG. 4, in S401, the CPU 22 of the battery output control device 20 wirelessly transmits battery information of the batteries 6 (

batteries

6A, 6B, . . . ) including battery voltage, temperature information, etc. Obtained via network 27 .

In S402, the CPU 22 generates selection information for selecting one of the plurality of batteries (

batteries

6A, 6B) as the first output source.

In S403, the switcher 30 selects the battery as the first output source based on the selection information. The selection information generated by the CPU 22 includes identification information (ID) for identifying the

batteries

6A and 6B, and the switch 30 uses the identification information (ID) to select a plurality of batteries (

battery

6A , 6B) to be the first output source.

In S404, the CPU 22 determines whether or not the battery temperature information being output has reached a predetermined temperature information threshold value Th (Th_A, Th_B). If the temperature information is less than the predetermined temperature information threshold Th (S404-Yes), in S405 the switch 30 continues the output from the battery during output based on the output control signal.

On the other hand, when it is determined in S404 that the temperature information is equal to or greater than the predetermined temperature information threshold Th (S404-No), the CPU 22 outputs (ON) at the timing when the temperature information becomes equal to or greater than the threshold Th (Th_A, Th_B). A pulse width τ indicating the duration of the state is determined, and a delay time τ _delay is set (S406).

In S407, the CPU 22 of the battery output control device 20 generates an output control signal for controlling the output and output stop of each battery. For example, the CPU 22 causes the other battery (eg, battery 6B) to output at the timing when the temperature information 611 of the battery being output (eg, battery 6A) becomes equal to or greater than a predetermined temperature information threshold value Th_A, and during the delay time An output control signal that controls the output and output stop of each battery so that the output from the battery 6A continues until the delay time _{τdelay_A} is reached, and the output from the battery 6A during output is stopped at the timing when the delay time τdelay_A is reached. Generate.

In S<b>408 , the switcher 30 switches between output and output stop of the plurality of batteries based on the output control signal generated by the battery output control device 20 , and outputs the output from each battery to the device 10 . For example, the switch 30 stops the output from one of the plurality of batteries 6 (for example, the battery 6A) while outputting from the other battery (for example, the battery 6B). switch.

In S409, the CPU 22 determines whether or not the battery temperature information being output has reached a predetermined temperature information threshold value Th (Th_A, Th_B). If the temperature information is less than the predetermined temperature information threshold Th (S409-Yes), in S410, the switch 30 continues the output from the battery that is being output, switched in S408, based on the output control signal. .

On the other hand, when it is determined in S409 that the temperature information is equal to or greater than the predetermined temperature information threshold Th (S409-No), the CPU 22 outputs (ON) at the timing when the temperature information becomes equal to or greater than the threshold Th (Th_A, Th_B). A pulse width τ indicating the duration of the state is determined, and a delay time τ _delay is set (S411).

At S412, the CPU 22 of the battery output control device 20 generates an output control signal for controlling the output and output stop of each battery. For example, the CPU 22 causes the other battery (eg, battery 6A) to output at the timing when the temperature information 612 of the battery being output (eg, battery 6B) reaches or exceeds a predetermined temperature information threshold value Th_B, and the delay time The output from the battery 6B is continued until the delay time _{τdelay_B} is reached, and an output control signal for controlling the output of each battery is generated so as to stop the output from the battery 6B during output at the timing of reaching the delay time τdelay_B.

In S<b>413 , the switcher 30 switches between output and output stop of the plurality of batteries based on the output control signal generated by the battery output control device 20 , and outputs the output from each battery to the device 10 . For example, the switch 30 stops the output from one of the plurality of batteries 6 (for example, the battery 6B) while outputting from the other battery (for example, the battery 6A). switch.

The process returns to S404 and repeats the same process. In S408 and S413, based on the output control signal generated by the CPU 22, the switch 30 switches between the output from one battery and the output stop state of the other battery, and the output from the other battery and the one battery. Alternates between output stop and . By alternately switching battery output and output stop between the plurality of

batteries

6A and 6B, when using a plurality of batteries, the output of the plurality of batteries is controlled so as to suppress the temperature rise of the batteries during discharge. it becomes possible to As a result, deterioration in performance of the battery can be suppressed by suppressing an increase in temperature of the battery during discharging.

[Summary of embodiment]
Configuration 1. The battery output control system of the above embodiment is a battery output control system (1) that controls outputs of a plurality of batteries,
an acquisition means (25) for acquiring battery information including temperature information and battery voltages of the plurality of batteries;
processing means (22) for generating selection information for selecting one of the plurality of batteries as an output source, and an output control signal for controlling output and output stop of each battery based on the battery information;
Switching means (30) for switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output,
The processing means (22), as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
The switching means switches output and output stop of the plurality of batteries based on the output control signal, and outputs the output from each battery to the device.

Configuration 2. In the battery output control system (1) of the above embodiment,
Based on the battery voltage included in the battery information, the processing means (22) sets a cycle time for controlling the output and stop of output from each battery.

Configuration 3. In the battery output control system (1) of the above embodiment,
The processing means (22) determines, based on the temperature information included in the battery information obtained from each battery, a pulse width indicating the duration of the output state from each battery.

Configuration 4. In the battery output control system (1) of the above embodiment,
The processing means (22) determines, as the pulse width, the time from the start of output from each battery until reaching the threshold when the temperature information becomes equal to or greater than the threshold of the predetermined temperature information.

Configuration 5. In the battery output control system (1) of the above embodiment,
The processing means sets a predetermined ratio of time to the pulse width as the delay time.

Configuration 6. In the battery output control system (1) of the above embodiment,
The processing means (22) sets a time set according to the ratio between the pulse width and the cycle time as the delay time.

Configuration 7. In the battery output control system (1) of the above embodiment,
Further comprising storage means (24) for pre-storing a delay time corresponding to the battery voltage,
The processing means (22) sets the delay time corresponding to the battery voltage by referring to the storage means.

Configuration 8. In the battery output control system (1) of the above embodiment,
The outputs from the plurality of batteries controlled based on the output control signal overlap during the delay time.

According to Configuration 8, it is possible to continuously supply battery output (voltage and current).

Configuration 9. The battery output control method of the above embodiment is a battery output control method in a battery output control system (1) for controlling outputs of a plurality of batteries,
an acquisition step (S401) of acquiring battery information including temperature information and battery voltages of the plurality of batteries;
A processing step of generating selection information for selecting one battery as an output source from the plurality of batteries and an output control signal for controlling the output and output stop of each battery based on the battery information (S402, S407, S412) and
a switching step (S408, S413) of switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output. death,
In the processing step, as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
In the switching step, based on the output control signal, the output of the plurality of batteries is switched between output and output stop, and the output from each battery is output to the device.

According to Configurations 1 to 9 above, when using a plurality of batteries, it is possible to control the outputs of the plurality of batteries so as to suppress the temperature rise of the batteries during discharge. As a result, deterioration in performance of the battery can be suppressed by suppressing an increase in temperature of the battery during discharging.

The invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the invention.

1: battery output control system, 10: device, 20: battery output control device, 22, CPU, 30: switch, 40: information communication unit (TCU), 6A: battery, 6B: battery

Claims

A battery output control system for controlling outputs of a plurality of batteries,
acquisition means for acquiring battery information including temperature information and battery voltages of the plurality of batteries;
processing means for generating selection information for selecting one of the plurality of batteries as an output source, and an output control signal for controlling output and output stop of each battery based on the battery information;
switching means for switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output;
The processing means, as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
The battery output control system, wherein the switching means switches output and output stop of the plurality of batteries based on the output control signal, and outputs the output from each battery to the device.
3. The battery output control system according to claim 1, wherein the processing means sets a cycle time for controlling output and output stoppage from each battery based on the battery voltage included in the battery information.
2. The processing means determines, based on the temperature information included in the battery information obtained from each battery, the pulse width indicating the duration of the output state from each battery. The battery output control system as described in .
The processing means determines, as the pulse width, the time from the start of output from each battery to the time when the temperature information reaches the threshold when the temperature information becomes equal to or greater than the threshold of the predetermined temperature information. 4. The battery output control system according to 3.
The battery output control system according to claim 3 or 4, characterized in that said processing means sets a predetermined ratio of time to said pulse width as said delay time.
5. The battery output control system according to claim 3, wherein said processing means sets a time set according to a ratio between said pulse width and said cycle time as said delay time.
Further comprising storage means for pre-storing a delay time corresponding to the battery voltage,
5. The battery output control system according to claim 1, wherein said processing means sets said delay time corresponding to said battery voltage by referring to said storage means.
3. The output from the plurality of batteries controlled based on the output control signal is in a state in which the outputs from the plurality of batteries overlap during the delay time. 8. The battery output control system according to any one of 1 to 7.
A battery output control method in a battery output control system for controlling outputs of a plurality of batteries, comprising:
an acquiring step of acquiring battery information including temperature information and battery voltages of the plurality of batteries;
a processing step of generating selection information for selecting one of the plurality of batteries as an output source, and an output control signal for controlling output and output stop of each battery based on the battery information;
a switching step of switching output and output stop of the plurality of batteries based on the output control signal, and outputting the output from each battery to a device driven based on the output;
In the processing step, as the output control signal,
outputting from the other battery whose output is stopped at the timing of a threshold reaching time when the temperature information of the one battery that is outputting becomes equal to or greater than a predetermined temperature information threshold;
continuing output from the one battery until a delay time delayed from the threshold arrival time is reached;
generating a signal for controlling the output and output stop of each battery so as to stop the output from the one battery during output at the timing when the delay time delayed from the threshold reaching time is reached;
The battery output control method, wherein in the switching step, based on the output control signal, output from the plurality of batteries is switched between output and output stop, and output from each battery is output to the device.