Hybrid System

Abstract

To provide a hybrid system capable of detecting and storing the temperature of a battery for supplying power to a motor during a stored state of the battery while reducing the power consumption of the battery supplying power to an engine control unit (ECU).SOLUTION: A hybrid system 10 is a hybrid system to be mounted to an industrial machine. The hybrid system 10 comprises a motor 2, a battery 50 for supplying power to the motor 2, and a memory unit 151, and comprises a control unit 150 that executes control of detecting the temperature of the battery 50 at time when an ignition switch of the industrial machine is turned on and storing the temperature at the detection to the memory unit 151 as a temperature at time when the industrial machine is stored.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hybrid system mounted on an industrial machine. [Background technology]

[0002] Hybrid systems that use an engine, a motor, and a battery in combination have been developed for industrial machinery, automobiles, etc. in response to demands for low pollution and fossil fuel resource conservation. A hybrid system includes an internal combustion engine that uses, for example, fossil fuel to generate power, a motor that assists the internal combustion engine, and a battery such as a lithium-ion battery that supplies power to the motor.

[0003] In a hybrid system, a battery pack including, for example, a lithium-ion battery is used as a power source for driving a motor. A degradation phenomenon occurs in lithium-ion batteries, in which the full charge capacity decreases due to long-term storage or long-term use. Therefore, Patent Document 1 discloses a method for measuring a side reaction current value of a secondary battery, a method for estimating a life span, and a method for inspecting the battery for suitability for shipment based on the estimated life span.

[0004] For example, automobile manufacturers independently implement lithium-ion battery degradation warranties for automobiles such as passenger cars with hybrid systems. Lithium-ion battery degradation warranties include a warranty to replace the lithium-ion battery free of charge if the lithium-ion battery deteriorates beyond a certain threshold within a period of use of 5 years or a mileage of 100,000 kilometers.

[0005] From the viewpoint of safety and life span, the use of lithium-ion batteries in high-temperature environments is not recommended. Therefore, one example of a warranty condition for lithium-ion batteries is that they are used at or below a certain temperature. Here, in automobiles such as passenger cars, the ECU (Engine Control Unit) may periodically start up not only when the automobile is in operation but also when the power is off (i.e., the ignition switch is off), and detect and store the temperature of the lithium-ion battery when the automobile is stored. In this case, the automobile manufacturer can negotiate the warranty based on the temperature data when the automobile was stored.

[0006] However, there is a problem that the storage period of industrial machinery may be longer than that of automobiles. That is, when the storage period of industrial machinery is relatively long, the battery (e.g., a lead-acid battery) that supplies power to the ECU may be removed from the industrial machinery by the user during storage. In this case, the ECU cannot receive power and therefore cannot start up when the power is off, and cannot detect and store the temperature of the lithium-ion battery during storage of the industrial machinery.

[0007] In addition, even if the battery that supplies power to the ECU remains attached to the industrial machine during storage, there is a problem that the power caused by the dark current for starting the ECU when the power is off is consumed in the battery (e.g., a lead-acid battery). In other words, when the industrial machine is stored for a relatively long period of time, the amount of power consumed by the battery (e.g., a lead-acid battery) caused by the dark current cannot be ignored, and the power consumption of the battery (e.g., a lead-acid battery) when the power is off is one of the important issues. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2021-131344 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a hybrid system that can detect and store the storage temperature of a battery that supplies power to a motor while reducing the power consumption of the battery that supplies power to an ECU. [Means for solving the problem]

[0010] A first aspect of the present invention is a hybrid system mounted on an industrial machine, comprising: a motor; a battery that supplies power to the motor; and a control unit that has a memory unit and executes control to detect the temperature of the battery when an ignition switch of the industrial machine is turned on and store the detected temperature in the memory unit as the storage temperature of the industrial machine.

[0011] According to the first aspect of the present invention, even if the control unit does not start when the power is off (i.e., the ignition switch of the industrial machine is off), it detects the temperature of the battery when the ignition switch of the industrial machine is turned on, and stores the detected temperature in the memory unit as the temperature during storage of the industrial machine. Therefore, the hybrid system according to the first aspect of the present invention can detect and store the temperature during storage of the battery (e.g., lithium ion battery) that supplies power to the motor while suppressing the power consumption of the battery (e.g., lead acid battery) that supplies power to the control unit such as the ECU. As a result, the hybrid system according to the first aspect of the present invention can detect and store the temperature of the battery during storage of the industrial machine in relation to the deterioration of the battery that supplies power to the motor, and can obtain temperature data during storage that can be effectively used for battery warranty negotiations.

[0012] A second aspect of the present invention is a hybrid system characterized in that, in the first aspect of the present invention, the control unit measures the elapsed time from when the ignition switch was last turned off to when it is turned on this time, and if the elapsed time is greater than or equal to a predetermined time, executes control to store the temperature at the time of detection in the memory unit as the temperature at the time of storage.

[0013] According to the second aspect of the present invention, when the elapsed time from when the ignition switch was last turned off until it is turned on this time is equal to or longer than a predetermined time, the control unit stores in the memory unit the temperature of the battery when the ignition switch is turned on as the temperature during storage of the industrial machine, so that it is possible to prevent the temperature of the battery when the ignition switch is turned on again immediately after being turned off from being stored in the memory unit as the temperature during storage of the industrial machine. In other words, the control unit can prevent a temperature that is inappropriate as the temperature during storage of the industrial machine from being stored in the memory unit. As a result, the hybrid system according to the second aspect of the present invention can obtain temperature data during storage that can be used more effectively in battery warranty negotiations.

[0014] A third aspect of the present invention is a hybrid system according to the first or second aspect of the present invention, characterized in that the control unit executes control to detect the temperature of the battery at predetermined time intervals while the industrial machine is operating after the ignition switch is turned on, and further store the temperature at each predetermined time interval in the memory unit.

[0015] According to the third aspect of the present invention, the control unit stores in the memory unit both the temperature of the battery when the industrial machine is stored and the temperature of the battery when the industrial machine is in operation. Therefore, the hybrid system according to the third aspect of the present invention can more reliably determine whether the user of the industrial machine is using the battery at an abnormal temperature. As a result, the hybrid system according to the third aspect of the present invention can obtain temperature data during storage and operation that can be more effectively used in battery warranty negotiations.

[0016] A fourth aspect of the present invention is a hybrid system according to any one of the first to third aspects of the present invention, characterized in that the memory unit stores weather data for a location where the industrial machinery is used, and the control unit executes control to correct the temperature at the time of detection using the weather data depending on at least one of the time, day, and month when the ignition switch is turned on, and to store the corrected temperature in the memory unit as the temperature at the time of storage instead of the temperature at the time of detection.

[0017] According to a fourth aspect of the present invention, the control unit corrects the temperature of the battery when the ignition switch is turned on by using weather data according to at least one of the time, day, and month when the ignition switch is turned on. Then, the control unit stores the corrected temperature in the memory unit as the temperature during storage of the industrial machine, instead of the temperature of the battery when the ignition switch is turned on. Therefore, the control unit can store the temperature of the battery during storage of the industrial machine in the memory unit with higher accuracy while suppressing the influence of the time, day, and month when the ignition switch of the industrial machine is turned on. As a result, the hybrid system according to the fourth aspect of the present invention can obtain temperature data during storage that can be used more effectively in battery warranty negotiations. Effect of the Invention

[0018] According to the present invention, it is possible to provide a hybrid system that can detect and store the storage temperature of a battery that supplies power to a motor while suppressing the power consumption of the battery that supplies power to an ECU. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a block diagram illustrating a hybrid system according to an embodiment of the present invention. [Diagram 2] 4 is a flowchart illustrating a first specific example of the operation of the hybrid system according to the present embodiment. [Diagram 3]10 is a flowchart illustrating a second specific example of the operation of the hybrid system according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiments described below are preferred specific examples of the present invention, and therefore various technically preferable limitations are applied to them, but the scope of the present invention is not limited to these aspects unless otherwise specified in the following description to the effect that the present invention is limited to them. In addition, in each drawing, similar components are given the same reference numerals, and detailed descriptions thereof are omitted as appropriate.

[0021] FIG. 1 is a block diagram showing a hybrid system according to an embodiment of the present invention. 1 includes an engine 1, a motor generator 2, and a battery pack 40. The motor generator 2 of the present embodiment is an example of the “motor” of the present invention. The hybrid system 10 further includes a DC / DC converter 70.

[0022] The engine 1 is, for example, a multi-cylinder diesel engine such as a turbocharged high-output three-cylinder or four-cylinder engine. However, the engine 1 is not limited to a diesel engine. The engine 1 has an ECU (Engine Control Unit) 150. The ECU 150 of this embodiment is an example of a "controller" of the present invention. The ECU 150 controls the operation of the engine 1, and also communicates with the motor generator 2 and the DC / DC converter 70 via, for example, a CAN (Controller Area Network) to control the motor generator 2 and the DC / DC converter 70. The ECU 150 also has a storage unit 151.

[0023] The motor generator 2 runs on power supplied from the battery pack 40 to support the engine 1 when power is required, such as when the industrial machine or the like in which the hybrid system 10 is mounted starts or accelerates. The hybrid system 10 is mounted on industrial machines or the like including construction machines such as forklifts and agricultural machines such as tractors. The motor generator 2 also uses regenerative braking or the like to convert the kinetic energy of the industrial machine or the like in which the hybrid system 10 is mounted into electrical energy to generate electricity. The motor generator 2 has an inverter built in. However, the inverter does not necessarily have to be built in the motor generator 2, and may be provided separately from the motor generator 2.

[0024] The battery pack 40 includes a first battery 50, a positive contactor 75, a negative contactor 76, a current value detector 65, a BMU (Battery Management Unit) 85, and a fuse 95. The first battery 50 is provided as a driving power source for the motor generator 2, and supplies power to the motor generator 2. The first battery 50 includes a positive terminal 51 and a negative terminal 52. An example of the first battery 50 is a high-voltage lithium-ion battery (LiB) of 48 V. However, the first battery 50 is not limited to a lithium-ion battery. Furthermore, the voltage of the first battery 50 is not limited to 48 V, and may be 48 V or higher. The first battery 50 of this embodiment is an example of the "battery" of the present invention.

[0025] The positive contactor 75 is provided in an electric circuit between the positive terminal 51 of the first battery 50 and the motor generator 2. Specifically, as shown in Fig. 1, the positive contactor 75 is provided in positive wirings 173, 174 that connect the positive terminal 51 of the first battery 50 and the motor generator 2. In other words, the electric circuit between the positive terminal 51 of the first battery 50 and the motor generator 2 includes the positive wiring 173 and the positive wiring 174. The positive contactor 75 is electrically connected to the ECU 150 by a signal line 181, and opens and closes the positive wirings 173, 174 based on a control signal transmitted from the ECU 150 through the signal line 181.

[0026] The positive electrode side contactor 75 may be electrically connected to the BMU 85. In this case, the positive electrode side contactor 75 opens and closes the positive electrode wirings 173 and 174 based on a control signal transmitted from the BMU 85.

[0027] The negative contactor 76 is provided in an electric circuit between the negative terminal 52 of the first battery 50 and the motor generator 2. Specifically, as shown in Fig. 1, the negative contactor 76 is provided in a negative wiring 175 that connects the negative terminal 52 of the first battery 50 and the motor generator 2. In other words, the electric circuit between the negative terminal 52 of the first battery 50 and the motor generator 2 includes the negative wiring 175. The negative contactor 76 is electrically connected to the BMU 85 by a signal line 182, and opens and closes the negative wiring 175 based on a control signal transmitted from the BMU 85 through the signal line 182.

[0028] The negative contactor 76 may be electrically connected to the ECU 150. In this case, the negative contactor 76 opens and closes the negative wiring 175 based on a control signal transmitted from the ECU 150.

[0029] The BMU 85 is electrically connected to the ECU 150 by a signal line 193, and controls the negative contactor 76 based on a control signal transmitted from the ECU 150 through the signal line 193. The ECU 150 and the BMU 85 communicate with each other, for example, via a CAN, and monitor each other's states.

[0030] The BMU 85 is electrically connected to the first battery 50 by a signal line 183, and detects the voltage value of the first battery 50 based on a signal transmitted from the first battery 50 through the signal line 183. Specifically, the BMU 85 detects the voltage value of each cell built into the first battery 50 using an internal circuit built into the BMU 85 itself, and detects the sum of the voltage values ​​of the cells as the voltage value of the first battery 50. Then, the BMU 85 transmits the voltage value of the first battery 50 detected by the internal circuit to the ECU 150.

[0031] The BMU 85 monitors the state of the first battery 50 and can detect an abnormality in the first battery 50 based on a signal transmitted from the first battery 50 through the signal line 183. For example, the BMU 85 detects the voltage value of the first battery 50 based on the signal transmitted from the first battery 50 through the signal line 183, and detects an overcharge abnormality and an overdischarge abnormality.

[0032] The BMU 85 acquires the cell temperature of the first battery 50 from a CMU (Cell Management Unit; not shown) through a signal line 183. The BMU 85 communicates with the ECU 150 via the CAN and transmits the acquired cell temperature of the first battery 50 to the ECU 150. This enables the ECU 150 to detect the cell temperature of the first battery 50. The BMU 85 detects an over-temperature abnormality based on the cell temperature acquired from the CMU.

[0033] The BMU 85 is electrically connected to the current value detection unit 65 by a signal line 184, and acquires a current value from the current value detection unit 65 through the signal line 184. The current value detection unit 65 is provided in the positive wiring 174, and detects the value of a current flowing through the positive wiring 174. In other words, the BMU 85 acquires the value of a current flowing through the positive wiring 174 from the current value detection unit 65 through the signal line 184. The BMU 85 detects an overcurrent abnormality based on the current value acquired from the current value detection unit 65 through the signal line 184.

[0034] The fuse 95 is provided in the positive electrode wiring 174 between the current value detection unit 65 and the positive electrode side contactor 75. The fuse 95 cuts off the electric circuit, i.e., the positive electrode wiring 174, when an overcurrent flows through the positive electrode wiring 174.

[0035] As described above, the negative electrode wiring 175 electrically connects the negative electrode terminal 52 of the first battery 50 and the motor generator 2, and serves as the ground 100B. For example, the negative electrode wiring 175 is connected to the body of an industrial machine or the like in which the hybrid system 10 is mounted, and is grounded. The positive electrode wiring 173 electrically connects the positive electrode terminal 51 of the first battery 50 and the motor generator 2, and also electrically connects the motor generator 2 and the DC / DC converter 70. When the first battery 50 is a 48V lithium-ion battery as in the hybrid system 10 shown in FIG. 1, the potential of the positive electrode wirings 173, 174 relative to the negative electrode wiring 175 is 48V.

[0036] The DC / DC converter 70 is electrically connected to the second battery 80 via a positive wiring 171 and a negative wiring 172. The negative wiring 172 electrically connects the negative terminal 82 of the second battery 80 to the DC / DC converter 70, and serves as a ground 100B. For example, the negative wiring 172 is connected to a body of an industrial machine or the like on which the hybrid system 10 is mounted, and is grounded. The positive wiring 171 electrically connects the positive terminal 81 of the second battery 80 to the DC / DC converter 70. When the second battery 80 is a 12V lead-acid battery as in the hybrid system 10 shown in FIG. 1, the potential of the positive wiring 171 relative to the negative wiring 172 is 12V. The second battery 20 supplies power to the ECU 150.

[0037] The DC / DC converter 70 detects the voltage value of the second battery 80 using an internal circuit built into the DC / DC converter 70 itself. Then, the DC / DC converter 70 transmits the voltage value of the second battery 80 detected by the internal circuit to the ECU 150.

[0038] As described above, the motor generator 2 uses regenerative braking or the like to convert the kinetic energy of the industrial machine or the like on which the hybrid system 10 is mounted into electrical energy to generate power. The motor generator 2 supplies a voltage to the first battery 50 to charge the first battery 50, and also supplies a voltage to the second battery 80 to charge the second battery 80. Here, taking the hybrid system 10 shown in FIG. 1 as an example, the potential of the positive electrode wiring 173 relative to the negative electrode wiring 175 is 48V. That is, the generated voltage of the motor generator 2 is 48V. On the other hand, the potential of the positive electrode wiring 171 relative to the negative electrode wiring 172 is 12V. Therefore, the DC / DC converter 70 converts the voltage of 48V generated by the motor generator 2 into a voltage of 12V. As a result, the motor generator 2 can supply a voltage of 12V to the second battery 80 via the DC / DC converter 70 to charge the second battery 80.

[0039] Furthermore, the DC / DC converter 70 is electrically connected to the first battery 50 and the second battery 80, and can charge and discharge between the first battery 50 and the second battery 80 based on a control signal transmitted from the ECU 150. For example, the DC / DC converter 70 can discharge the first battery 50 and charge the second battery 80 by converting a voltage and causing a constant current (e.g., 10 A) to flow from the first battery 50 to the second battery 80. Alternatively, for example, the DC / DC converter 70 can discharge the second battery 80 and charge the first battery 50 by converting a voltage and causing a constant current (e.g., 10 A) to flow from the second battery 80 to the first battery 50.

[0040] From the viewpoint of safety and life span, it is not recommended to use the first battery 50 (such as a lithium ion battery) in a high temperature environment. Therefore, an example of a guarantee condition for the first battery 50 is that the first battery 50 is used at a certain temperature or lower. At this time, the storage period of the industrial machine in which the hybrid system 10 is mounted may become an issue. That is, when the storage period of the industrial machine in which the hybrid system 10 is mounted is relatively long, the second battery 80 that supplies power to the ECU 150 may be removed from the industrial machine by the user of the industrial machine during storage. In this case, the ECU 150 cannot receive power supply, and therefore cannot start up when the power is off (i.e., the ignition switch of the industrial machine is off), and therefore cannot detect and store the temperature of the first battery 50 during storage of the industrial machine.

[0041] Furthermore, even if the second battery 80 remains attached to the industrial machine during storage of the industrial machine, there is a problem in that the power caused by the dark current for starting the ECU 150 when the power is off is consumed in the second battery 80. In other words, when the industrial machine is stored for a relatively long period of time, the amount of power consumption of the second battery 80 caused by the dark current cannot be ignored, and the power consumption of the second battery 80 when the power is off is one of the important issues.

[0042] In contrast, the ECU 150 of the hybrid system 10 according to this embodiment detects the temperature of the first battery 50 when the ignition switch of the industrial machine on which the hybrid system 10 is mounted is turned on, and executes control to store the detected temperature in the memory unit 151 as the temperature of the industrial machine when it is stored. Specifically, when the ignition switch of the industrial machine on which the hybrid system 10 is mounted is turned on, the ECU 150 communicates with the BMU 85 via the CAN and acquires the cell temperature of the first battery 50 acquired by the BMU 85. Then, the ECU 150 stores the cell temperature of the first battery 50 acquired from the BMU 85 via the CAN in the memory unit 151 as the temperature of the industrial machine when it is stored.

[0043] According to the hybrid system 10 of this embodiment, even if the ECU 150 does not start when the power is off (i.e., the ignition switch of the industrial machine is off), the ECU 150 detects the temperature of the first battery 50 when the ignition switch of the industrial machine is turned on, and stores the detected temperature in the storage unit 151 as the temperature during storage of the industrial machine. Therefore, the hybrid system 10 can detect and store the temperature of the first battery 50 during storage of the industrial machine while suppressing the power consumption of the second battery 80. As a result, the hybrid system 10 of this embodiment can detect and store the temperature of the first battery 50 during storage of the industrial machine in relation to deterioration of the first battery 50, and can obtain temperature data during storage that can be effectively used in warranty negotiations for the first battery 50.

[0044] A specific example of the operation of the hybrid system 10 according to this embodiment will be described in detail below with reference to the drawings. FIG. 2 is a flowchart showing a first specific example of the operation of the hybrid system according to the present embodiment.

[0045] First, in step S11, a user of an industrial machine equipped with the hybrid system 10 turns on the ignition switch of the industrial machine by pressing a starter key for starting the hybrid system 10. Then, in step S12, the ECU 150 measures the elapsed time from when the ignition switch was last turned off until it is now turned on, and determines whether the elapsed time is equal to or longer than a predetermined time. In step S12 shown in FIG. 2, the "predetermined time" is three hours. However, the "predetermined time" in step S12 is not limited to three hours, and may be, for example, equal to or longer than one hour and equal to or shorter than five hours.

[0046] If the time that has elapsed since the ignition switch was last turned off until it is turned on this time is three hours or more (step S12: YES), in step S13, ECU 150 detects the temperature of first battery 50 when the ignition switch was turned on, and stores the detected temperature in memory unit 151 as the temperature when the industrial machinery was stored.

[0047] On the other hand, if the time elapsed from when the ignition switch was last turned off until it is turned on this time is less than three hours (step S12: NO), in step S14 following step S12, the ECU 150 does not store in the memory unit 151 the temperature of the first battery 50 when the ignition switch was turned on, but detects the temperature of the first battery 50 at predetermined time intervals while the industrial machine is in operation, and stores the temperature at each predetermined time interval in the memory unit 151. In step S14 shown in FIG. 2, the "predetermined time" is one hour. However, the "predetermined time" in step S14 is not limited to one hour, and may be, for example, one hour or more and three hours or less. In step S14 following step S13, ECU 150 executes the same process as that described above with respect to step S14.

[0048] Next, in step S15, a user of the industrial machine equipped with the hybrid system 10 turns off the ignition switch of the industrial machine. Then, in step S16, the ECU 150 measures the elapsed time since the ignition switch was turned off, and determines whether the elapsed time is equal to or longer than a predetermined time. The "predetermined time" in step S16 is the same as the "predetermined time" described above in relation to step S12.

[0049] If the time that has elapsed since the ignition switch was turned off is three hours or more (step S16: YES), the ECU 150 ends (shuts down) the operation of the hybrid system 10.

[0050] On the other hand, if the time that has elapsed since the ignition switch was turned off is less than three hours (step S16: NO), in step S17, ECU 150 determines whether or not the ignition switch is turned on. If the ignition switch is turned on (step S17: YES), ECU 150 executes the process described above with respect to step S11. On the other hand, if the ignition switch is not turned on (step S17: NO), ECU 150 executes the process described above with respect to step S16.

[0051] According to this specific example, when the elapsed time from when the ignition switch was last turned off until it is turned on this time is equal to or longer than a predetermined time, the ECU 150 stores the temperature of the first battery 50 when the ignition switch is turned on in the storage unit 151 as the temperature during storage of the industrial machine, and therefore, for example, it is possible to prevent the temperature of the first battery 50 when the ignition switch is turned on again immediately after being turned off from being stored in the storage unit 151 as the temperature during storage of the industrial machine. In other words, the ECU 150 can prevent a temperature that is inappropriate as the temperature during storage of the industrial machine from being stored in the storage unit 151. As a result, the hybrid system 10 according to this embodiment can acquire temperature data during storage that can be more effectively used in warranty negotiations for the first battery 50.

[0052] Furthermore, in step S14, the ECU 150 stores the temperature of the first battery 50 in the storage unit 151 at predetermined time intervals while the industrial machine is in operation. Therefore, the ECU 150 can store in the storage unit 151 both the temperature of the first battery 50 when the industrial machine is in storage and the temperature of the first battery 50 while the industrial machine is in operation. Therefore, the hybrid system 10 according to this embodiment can more reliably grasp whether or not the user of the industrial machine is using the first battery 50 at an abnormal temperature. As a result, the hybrid system 10 according to this embodiment can acquire temperature data during storage and operation that can be more effectively used in warranty negotiations for the first battery 50.

[0053] FIG. 3 is a flowchart showing a second specific example of the operation of the hybrid system according to the present embodiment. In the second specific example, step S13 described above with reference to Fig. 2 is replaced with step S23 shown in Fig. 3. The other steps are the same as those described above with reference to Fig. 2. That is, the processes executed in steps S21-S22 and S24-S27 shown in Fig. 3 are the same as those executed in steps S11-S12 and S14-S17 described above with reference to Fig. 2. Therefore, in this specific example, the description will focus on step S23, and descriptions of steps S21-S22 and S24-S27 will be omitted as appropriate.

[0054] First, in the hybrid system 10 of this specific example, the memory unit 151 stores weather data for a location where the industrial machine equipped with the hybrid system 10 is used. The weather data includes the temperature, humidity, wind direction and speed, and sunshine hours for the location where the industrial machine equipped with the hybrid system 10 is used.

[0055] If the time that has elapsed since the ignition switch was last turned off until it is turned on this time is three hours or more (step S22: YES), in step S23, ECU 150 corrects the temperature when the ignition switch was turned on using weather data according to at least one of the time, day, and month when the ignition switch was turned on, and stores the corrected temperature in memory unit 151 as the temperature when the industrial machinery was stored.

[0056] According to this specific example, the ECU 150 can store the temperature of the first battery 50 during storage of the industrial machine with higher accuracy in the storage unit 151 while suppressing the effects of the time, day, and month when the ignition switch of the industrial machine is turned on. This allows the hybrid system 10 according to this embodiment to acquire temperature data during storage that can be used more effectively in warranty negotiations for the first battery 50.

[0057] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims. The configurations of the above embodiments can be partially omitted or arbitrarily combined in a manner different from the above. [Explanation of symbols]

[0058] 1: engine, 2: motor generator, 10: hybrid system, 20: second battery, 40: battery pack, 50: first battery, 51: positive terminal, 52: negative terminal, 65: current value detection unit, 70: DC / DC converter, 75: positive contactor, 76: negative contactor, 80: second battery, 81: positive terminal, 82: negative terminal, 85: BMU, 95: fuse, 100B: ground, 150: ECU, 151: memory unit, 171: positive wiring, 172: negative wiring, 173: positive wiring, 174: positive wiring, 175: negative wiring, 181: signal line, 182: signal line, 183: signal line, 184: signal line, 193: signal line

Claims

1. A hybrid system mounted on an industrial machine, A motor; a battery for supplying power to the motor; A control unit having a storage unit; Equipped with The control unit is Measure a first elapsed time from when an ignition switch of the industrial machine was turned off last time to when it is turned on this time; when the first elapsed time is equal to or longer than a first predetermined time, a first temperature of the battery at the time when the ignition switch was turned on this time is detected, and the first temperature is stored in the storage unit; a control for detecting a second temperature of the battery every time a second predetermined time period shorter than the first predetermined time period elapses while the industrial machine is in operation, and further storing the second temperature in the storage unit as a temperature during operation of the industrial machine; Measure a second elapsed time since the ignition switch was turned off this time; A hybrid system, comprising: a control for shutting down an operation when the second elapsed time is equal to or greater than the first predetermined time.

2. The memory unit stores weather data for a location where the industrial machine is used, 2. The hybrid system according to claim 1, wherein the control unit executes control to correct the first temperature using the weather data according to at least one of the time, day, and month when the ignition switch was turned on this time, and to store the corrected temperature in the memory unit as the temperature during storage instead of the first temperature.

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