A mobile power supply status monitoring system, method, and electric excavator

Abstract

This application provides a mobile power supply status monitoring system, method, and electric excavator. The system includes a battery status conversion module and a battery status receiving module. The battery status conversion module is located inside the mobile power supply, and the battery status receiving module is located inside the electric excavator. The battery status conversion module acquires the battery status and determines a first signal corresponding to the battery status. The first signal is a voltage signal, a frequency signal, or a waveform signal. The first signal is transmitted to the battery status receiving module via a cable. The battery status receiving module receives the first signal and determines the battery status based on the first signal. The mobile power supply status monitoring system provided in this application avoids transmitting battery status via CAN communication, saving costs.

Description

Technical Field

[0001] This application relates to the field of electric excavator technology, specifically to a mobile power supply status monitoring system, method, and electric excavator. Background Technology

[0002] An electric excavator is a type of excavating machinery that uses electricity instead of a traditional internal combustion engine as its power source.

[0003] Electric excavators can be directly connected to a generator or power grid via a long cable. This method is suitable for construction environments with a stable power supply, but the cable length is limited, the range of movement is restricted, and the cable is easily damaged on complex construction sites.

[0004] Electric excavators can also be powered by portable power banks. Portable power supply solutions offer advantages such as convenient power supply and wide operating range. Currently, communication between the portable power bank and the electric excavator is primarily via a Controller Area Network (CAN) line. The CAN line allows the excavator to obtain the status of the portable power bank, enabling it to adjust its operating status accordingly.

[0005] When a mobile power supply communicates with an electric excavator via a CAN line, a CAN line needs to be added to the cable. Since the CAN line and the power line are transmitted in parallel on the same cable, the power line causes significant electromagnetic interference to the CAN line, and the transmission distance is short, which greatly restricts the working range of the electric excavator.

[0006] Therefore, a mobile power supply status monitoring system is needed to achieve the goal of monitoring the mobile power supply battery status without using a CAN bus when communicating with an electric excavator. Summary of the Invention

[0007] The mobile power supply status monitoring system, method, and electric excavator provided in this application embodiment solve the problems of large interference and short transmission distance when the mobile power supply status is transmitted through the CAN line when the electric excavator relies on the mobile power supply for power.

[0008] According to a first aspect of the embodiments of this application, a mobile power bank status monitoring system is provided, the system comprising:

[0009] The battery status conversion module and the battery status receiving module are provided, wherein the battery status conversion module is located inside the power bank and the battery status receiving module is located inside the electric excavator.

[0010] The battery state transition module is used to acquire the battery state and determine the first signal corresponding to the battery state; the first signal is a voltage signal, frequency signal, or waveform signal; the first signal is transmitted to the battery state receiving module through a cable;

[0011] The battery status receiving module is used to receive a first signal and determine the battery status based on the first signal.

[0012] In one embodiment, the battery state information includes a first state, a second state, and a third state, and the first signal includes a first voltage range, a second voltage range, and a third voltage range. The battery state transition module determines the first voltage range corresponding to the first state, or determines the second voltage range corresponding to the second state, or determines the third voltage range corresponding to the third state.

[0013] In one embodiment, the battery state receiving module is used to determine a first state based on a first voltage range, or a second state based on a second voltage range, or a third state based on a third voltage range.

[0014] In one embodiment, the battery state information includes a first state, a second state, and a third state, and the first signal includes a first frequency range, a second frequency range, and a third frequency range. The battery state transition module determines the first frequency range corresponding to the first state, or determines the second frequency range corresponding to the second state, or determines the third frequency range corresponding to the third state.

[0015] In one embodiment, the battery status receiving module is used to determine a first state based on a first frequency range, or a second state based on a second frequency range, or a third state based on a third frequency range.

[0016] In one embodiment, the battery state information includes a first state, a second state, and a third state, and the first signal includes a first waveform signal, a second waveform signal, and a third waveform signal. The battery state transition module determines the first waveform signal corresponding to the first state, or determines the second waveform signal corresponding to the second state, or determines the third waveform signal corresponding to the third state.

[0017] In one embodiment, the battery status receiving module is used to determine a first state based on a first waveform signal, or a second state based on a second waveform signal, or a third state based on a third waveform signal.

[0018] In one embodiment, the battery state information is determined by the battery management system based on the battery's current, voltage, and SOC.

[0019] According to a second aspect of the embodiments of this application, a method for monitoring the status of a mobile power bank is provided, the method comprising:

[0020] Get battery status;

[0021] The corresponding first signal is determined based on the battery status; the first signal is a voltage signal, a frequency signal, or a waveform signal.

[0022] The first signal is sent to the electric excavator so that the electric excavator receives the first signal and switches to battery mode.

[0023] According to a third aspect of the embodiments of this application, an electric excavator is provided, the electric excavator including a mobile power supply that provides power to the electric excavator, and a mobile power supply status monitoring system as described in the first aspect or any embodiment of the first aspect.

[0024] The mobile power supply status monitoring system, method, and electric excavator provided in this application monitor the status of the mobile power supply through a battery status conversion module installed inside the mobile power supply and a battery status receiving module installed inside the electric excavator. The battery status conversion module acquires the battery status and converts it into a voltage signal, frequency signal, or waveform signal, which is then received by the battery status receiving module and converted back into the battery status. This application embodiment transmits the aforementioned voltage, frequency, or waveform signals via a cable between the mobile power supply and the electric excavator, avoiding interference during CAN bus transmission and saving costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the implementation environment according to the present invention;

[0027] Figure 2 This is a structural block diagram of the mobile power supply status monitoring system provided in the embodiments of this application;

[0028] Figure 3 This is a structural block diagram of a mobile power supply provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of a mobile power supply status monitoring system provided in this application embodiment when the first signal is a voltage signal;

[0030] Figure 5 This application provides another schematic diagram of a mobile power bank status monitoring system.

[0031] Figure 6 A flowchart of a mobile power supply status monitoring method provided in an embodiment of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The solution of powering electric excavators with mobile power supplies has the advantages of convenient power supply and wide power supply range. At present, the communication between mobile power supplies and electric excavators is mainly through the CAN line to obtain the status of the mobile power supply, so that the electric excavator can adjust its working status according to the status of the mobile power supply.

[0034] When a mobile power supply communicates with an electric excavator via a CAN line, a CAN line needs to be added to the cable. Since the CAN line and the cable are transmitted in parallel, the power line causes significant electromagnetic interference to the CAN line, and the transmission distance is short, which greatly restricts the working range of the electric excavator.

[0035] The mobile power supply status monitoring system provided in this application embodiment can acquire the battery status through a battery status conversion module and convert the battery status into a voltage signal, frequency signal, or waveform signal. This signal is then received by a battery status receiving module and converted back into the battery status. This application embodiment transmits the voltage, frequency, or waveform signals via a cable between the mobile power supply and the electric excavator, avoiding interference during CAN bus transmission and saving costs.

[0036] Exemplary Implementation Environment

[0037] Figure 1 This is a schematic diagram of the implementation environment according to the present invention, such as... Figure 1 As shown, the implementation environment of this application embodiment may include an electric excavator and a mobile power supply, enabling long-distance transmission, for example, up to 300 meters. Existing technologies typically use a distance of 50 meters. The mobile power supply has a built-in battery state conversion module that can acquire the battery state and convert it into a first signal, which is then sent to a battery state receiving module located on the electric excavator. The battery state receiving module can then convert the first signal back into a battery state and send it to the electric excavator's vehicle controller, allowing the vehicle controller to adjust the electric excavator's operating state in a timely manner based on the battery state.

[0038] Exemplary System

[0039] Figure 2 This is a structural block diagram of the mobile power bank status monitoring system provided in an embodiment of this application. Please refer to [link / reference]. Figure 2In one exemplary embodiment, a mobile power bank status monitoring system is provided, which may include:

[0040] The battery status conversion module 210 and the battery status receiving module 220 are provided, wherein the battery status conversion module 210 is disposed inside the power bank and the battery status receiving module 220 is disposed inside the electric excavator.

[0041] The battery state transition module 210 is used to acquire the battery state and determine the first signal corresponding to the battery state; the first signal is a voltage signal, a frequency signal, or a waveform signal; the first signal is transmitted to the battery state receiving module 220 through a cable.

[0042] The battery status receiving module 220 is used to receive the first signal and determine the battery status based on the first signal.

[0043] Figure 3 This is a structural block diagram of a mobile power supply provided in an embodiment of this application. Figure 3 As shown, a portable power bank can generally include a battery management system (BMS), an energy storage battery, and a power conversion system (PCS).

[0044] The Battery Management System (BMS) monitors the status of energy storage batteries, including voltage, current, and State of Charge (SOC). In practical applications, the BMS can determine the battery status based on these parameters. After determining the battery status, the BMS can convert this information into control commands and send them to the Process Control System (PCS).

[0045] The PCS can handle AC / DC switching. When it detects an abnormality, it sends a protection command to the BMS, such as cutting off the charging / discharging circuit, to prevent battery damage or safety accidents. In practical applications, the PCS can receive the battery status sent by the BMS and determine the corresponding first signal, which is then sent to the battery status receiving module 220. Since the first signal can be transmitted to the battery status receiving module 220 via cable, battery status transmission can be achieved without adding a CAN line.

[0046] In this embodiment, the battery status receiving module 220 can be a signal conversion device. For example, when the first signal is a voltage signal, the battery status receiving module 220 can be a voltage sensor; when the first signal is a frequency signal, the battery status receiving module 220 can be a frequency sensor; when the first signal is a waveform signal, the battery status receiving module 220 can receive the first signal, convert the first signal into a battery status, and send it to the vehicle controller.

[0047] The mobile power supply status monitoring system in this embodiment converts the battery status into a first signal, which can be transmitted via a cable, so that the electric excavator can know the battery status. Since the first signal is transmitted via a cable, communication interference with the cable is avoided when adding a CAN line for transmission, and costs are also saved.

[0048] In one embodiment, the battery state information includes a first state, a second state, and a third state. The first signal is a voltage signal, which may include a first voltage range, a second voltage range, and a third voltage range. The battery state transition module 210 determines the first voltage range corresponding to the first state, or determines the second voltage range corresponding to the second state, or determines the third voltage range corresponding to the third state.

[0049] Figure 4 This is a schematic diagram of a mobile power supply status monitoring system provided in an embodiment of this application when the first signal is a voltage signal. Figure 4 As shown, the first, second, and third states of a battery can correspond to different battery states. For example, the first state can be a "fault state", the second state can be a "low SOC state", and the third state can be a "normal operating state".

[0050] The first, second, and third voltage ranges can be predetermined based on actual conditions. For example, the first voltage range corresponding to "fault state" can be [Va1, Va2); the second voltage range corresponding to "low SOC state" can be [Va2, Va3); and the third voltage range corresponding to "normal operation state" can be [Va3, Va4]. Where Va... n For different voltage values. More specifically, the first voltage range can be [310V, 350V), the second voltage range can be [350V, 380V), and the third voltage range can be [380V, 390V].

[0051] It should be noted that the battery state can also include a fourth state, a fifth state, and so on up to the Nth state, where N is a positive integer. When the battery state includes states one through N, the battery state transition module 210 can determine the corresponding voltage range and can divide different voltage ranges according to actual needs. When the first signal is a voltage signal, the voltage value range can be between 310V and 420V, and the voltage range can be divided according to actual needs. For example, the length of the voltage range can be 10V, which can be divided into 12 voltage ranges, each of which can represent a battery state. That is, the first voltage range corresponds to the first state, the second voltage range corresponds to the second state, and so on up to the twelfth voltage range, which corresponds to the twelfth state.

[0052] In this embodiment, the battery status receiving module 220 receives the voltage signal, converts the voltage signal into a battery status, and sends it to the vehicle controller. The vehicle controller can then know the current status of the mobile power supply. That is, the status of the mobile power supply can be known while it is providing power to the vehicle via cable, without the need for an additional CAN cable for signal transmission. This solves the problems of short transmission distance and high cost associated with using CAN cables, while also offering ease of use and high adaptability.

[0053] In practical applications, when the battery is in a fault state, to further clarify the fault level, the battery state conversion module 210 in this embodiment can also transmit a second signal corresponding to the fault state, which can be a voltage signal, frequency signal, or waveform signal, to the battery state receiving module 220 via a cable. For example, the fault state can be: Level 1 fault state, Level 2 fault state, Level 3 fault state, ... Level M fault state. The fault level can be determined according to the actual situation. For example, the voltage range corresponding to "Level 1 fault state" can be [Vb1, Vb2), the voltage range corresponding to "Level 2 fault state" can be [Vb2, Vb3), and the voltage range corresponding to "Level 3 fault state" can be [Vb3, Vb4), where Vbn represents different voltage values. More specifically, the voltage range corresponding to Level 1 fault state can be [310V, 320V), the voltage range corresponding to Level 2 fault state can be [320V, 330V), and the voltage range corresponding to Level 3 fault state can be [330V, 340V].

[0054] By mapping different battery states to different voltage ranges, the battery state receiving module 220 can determine the battery state upon receiving the voltage range. Since voltage can be transmitted via cable, the state of the energy storage battery can be determined without adding a CAN line.

[0055] In one embodiment, the battery status receiving module 220 is used to determine a first state based on a first voltage range, or a second state based on a second voltage range, or a third state based on a third voltage range.

[0056] After receiving a voltage range, the battery receiving module can determine the corresponding battery state based on the voltage range. In practical applications, sensors can detect the voltage range and transmit the voltage value to the vehicle controller via analog signals or communication; the vehicle controller then analyzes the voltage range to obtain the battery state.

[0057] In one embodiment, the battery state information includes a first state, a second state, and a third state. The first signal can be a frequency signal, including a first frequency range, a second frequency range, and a third frequency range. The battery state transition module 210 determines the first frequency range corresponding to the first state, or determines the second frequency range corresponding to the second state, or determines the third frequency range corresponding to the third state.

[0058] Using the previous example, the first, second, and third states of a battery can correspond to different battery states. For example, the first state can be a "fault state", the second state can be a "low SOC state", and the third state can be a "normal operating state".

[0059] The first, second, and third frequency ranges can be predetermined based on actual conditions. For example, the first frequency range corresponding to "fault state" can be [VF1, VF2); the second frequency range corresponding to "SOC low state" can be [VF2, VF3); and the third frequency range corresponding to "normal operation state" can be [VF3, VF4]. Where VF... n For different frequency values. More specifically, the first frequency range can be [45Hz, 48Hz), the second frequency range can be [48Hz, 49Hz), and the third frequency range can be [49Hz, 50Hz].

[0060] It should be noted that the battery state can also include a fourth state, a fifth state, and so on up to the Nth state, where N is a positive integer. When the battery state includes states one through N, the battery state conversion module 210 can determine the corresponding frequency range and can divide different frequency ranges according to actual needs. When the first signal is a frequency signal, the frequency value range can be between 45Hz and 60Hz, and the frequency range can be divided according to actual needs. For example, the length of the frequency range can be 1Hz, which can be divided into 15 frequency ranges, each of which can represent a battery state. That is, the first frequency range corresponds to the first state, the second frequency range corresponds to the second state, and so on up to the fifteenth frequency range, which corresponds to the fifteenth state.

[0061] In practical applications, when the battery is in a fault state, in order to further clarify the fault level of the battery, Figure 5 This application provides another schematic diagram of a mobile power bank status monitoring system as an embodiment. For example... Figure 5As shown, the battery state transition module 210 in this embodiment can also transmit a third signal corresponding to the fault state, and the third signal is a frequency signal. The third signal is transmitted to the battery state receiving module 220 via a cable. For example, the fault state can be: Level 1 fault state, Level 2 fault state, Level 3 fault state... Level M fault state. The fault level can be determined according to the actual situation. For example, the frequency range corresponding to "Level 1 fault state" can be [VF3, VF4), the frequency range corresponding to "Level 2 fault state" can be [VF2, VF3), and the frequency range corresponding to "Level 3 fault state" can be [VF1, VF2), where VF... n Different frequency values ​​are used. More specifically, the frequency range corresponding to the first-level fault state can be [45Hz, 46Hz), the frequency range corresponding to the second-level fault state can be [46Hz, 47Hz), and the frequency range corresponding to the third-level fault state can be [47Hz, 48Hz]. It should be noted that the third signal can also be a voltage signal or a waveform signal.

[0062] In this embodiment, the battery status receiving module 220 receives the frequency signal, converts the frequency signal into battery status, and sends it to the vehicle controller. The vehicle controller can then know the current status of the mobile power supply. That is, the status of the mobile power supply can be known while it is providing power to the vehicle via cable, without the need for an additional CAN cable for signal transmission. This solves the problems of short transmission distance and high cost associated with using CAN cables, while also being convenient and highly adaptable.

[0063] In one embodiment, the battery status receiving module 220 is used to determine a first status based on a first frequency range, or a second status based on a second frequency range, or a third status based on a third frequency range.

[0064] After receiving a frequency range, the battery receiving module can determine the corresponding battery status based on that range. In practical applications, sensors can detect frequency ranges and transmit the frequency values ​​to the vehicle controller via analog signals or communication; the vehicle controller then analyzes the frequency range to obtain the battery status.

[0065] In one embodiment, the battery state information includes a first state, a second state, and a third state. The first signal can be a waveform signal, including a first waveform signal, a second waveform signal, and a third waveform signal. The battery state transition module 210 determines the first waveform signal corresponding to the first state, or determines the second waveform signal corresponding to the second state, or determines the third waveform signal corresponding to the third state.

[0066] Using the previous example, the first, second, and third states of a battery can correspond to different battery states. For example, the first state can be a "fault state", the second state can be a "low SOC state", and the third state can be a "normal operating state".

[0067] A waveform signal can be understood as a superposition of voltage and frequency. The first, second, and third waveform signals can be predetermined based on the actual situation. For example, "fault state" corresponds to the first waveform signal; "SOC low state" corresponds to the second waveform signal; and "normal operation state" corresponds to the third waveform signal.

[0068] It should be noted that the battery state can also include the fourth state, the fifth state, ... the Nth state, where N is a positive integer; when the battery state includes the first state to the Nth state, the battery state conversion module 210 can determine the corresponding waveform signal.

[0069] In practical applications, when the battery is in a fault state, to further clarify the fault level, the battery state conversion module 210 in this embodiment can also transmit a fourth signal corresponding to the fault state. This fourth signal can be a voltage signal, a frequency signal, or a waveform signal; the fourth signal is transmitted to the battery state receiving module 220 via a cable. For example, the fault state can be: Level 1 fault state, Level 2 fault state, Level 3 fault state... Level M fault state. The fault level can be determined according to the actual situation. For example, the fourth waveform signal corresponds to "Level 1 fault state," the fifth waveform signal corresponds to "Level 2 fault state," and the sixth waveform signal corresponds to "Level 3 fault state."

[0070] By mapping different battery states to different waveform signals, the battery state receiving module 220 can determine the battery state upon receiving the waveform signals. Since voltage can be transmitted via cable, the state of the energy storage battery can be determined without adding a CAN line.

[0071] In one embodiment, the battery status receiving module 220 is used to determine a first status based on a first waveform signal, or a second status based on a second waveform signal, or a third status based on a third waveform signal.

[0072] After receiving the waveform signal, the battery receiving module can determine the corresponding battery state based on the waveform signal. In practical applications, sensors can detect the waveform signal and transmit the voltage value to the vehicle controller via analog signals or communication; the vehicle controller then analyzes the waveform signal to obtain the battery state.

[0073] In one embodiment, the battery state information is determined by the battery management system based on the battery's current, voltage, and SOC.

[0074] Exemplary methods

[0075] Accordingly, this application also provides a method for monitoring the status of a mobile power bank. Figure 6 A flowchart illustrating a mobile power bank status monitoring method provided in an embodiment of this application. The method may include:

[0076] S620: Get battery status;

[0077] S640: Determines the corresponding first signal based on the battery status; the first signal is a voltage signal, a frequency signal, or a waveform signal.

[0078] S660: Sends a first signal to the electric excavator so that the electric excavator receives the first signal and switches to battery mode.

[0079] The mobile power bank status monitoring method provided in this application acquires the battery status and converts it into a first signal, which may be a voltage signal, frequency signal, or waveform signal. This first signal is then sent to an electric excavator, enabling the excavator to determine the battery status based on the voltage, frequency, or waveform signal. Since the cable between the mobile power bank and the electric excavator in this application embodiment can transmit the aforementioned voltage, frequency, or waveform signal, battery status can be determined without adding other equipment. This also avoids interference during CAN bus operations, saving costs.

[0080] The mobile power bank status monitoring method provided in this embodiment belongs to the same application concept as the mobile power bank status monitoring system provided in the above embodiments of this application, and can be applied to the mobile power bank status monitoring system provided in any of the above embodiments of this application. Technical details not described in detail in this embodiment can be found in the specific processing content of the mobile power bank status monitoring system provided in the above embodiments of this application, and will not be repeated here.

[0081] This application also proposes an electric excavator, which includes a mobile power supply that provides power to the electric excavator, and the aforementioned mobile power supply status monitoring system.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mobile power bank status monitoring system, characterized in that, include: A battery state transition module (210) and a battery state receiving module (220) are provided, wherein the battery state transition module (210) is disposed inside the power bank and the battery state receiving module (220) is disposed inside the electric excavator; The battery state conversion module (210) is used to acquire the battery state and determine the first signal corresponding to the battery state; the first signal is a voltage signal, a frequency signal, or a waveform signal; the first signal is transmitted to the battery state receiving module (220) through a cable. The battery status receiving module (220) is used to receive the first signal and determine the battery status based on the first signal.

2. The mobile power bank status monitoring system according to claim 1, characterized in that, The battery state information includes a first state, a second state, and a third state. The first signal includes a first voltage range, a second voltage range, and a third voltage range. The battery state transition module (210) determines the first voltage range corresponding to the first state, or determines the second voltage range corresponding to the second state, or determines the third voltage range corresponding to the third state.

3. The mobile power bank status monitoring system according to claim 2, characterized in that, The battery status receiving module (220) is used to determine the first status based on the first voltage range, or the second status based on the second voltage range, or the third status based on the third voltage range.

4. The mobile power bank status monitoring system according to claim 1, characterized in that, The battery state information includes a first state, a second state, and a third state. The first signal includes a first frequency range, a second frequency range, and a third frequency range. The battery state transition module (210) determines the first frequency range corresponding to the first state, or determines the second frequency range corresponding to the second state, or determines the third frequency range corresponding to the third state.

5. The mobile power bank status monitoring system according to claim 4, characterized in that, The battery status receiving module (220) is used to determine the first status according to the first frequency range, or to determine the second status according to the second frequency range, or to determine the third status according to the third frequency range.

6. The mobile power bank status monitoring system according to claim 1, characterized in that, The battery state information includes a first state, a second state, and a third state. The first signal includes a first waveform signal, a second waveform signal, and a third waveform signal. The battery state conversion module (210) determines the first waveform signal corresponding to the first state, or determines the second waveform signal corresponding to the second state, or determines the third waveform signal corresponding to the third state.

7. The mobile power bank status monitoring system according to claim 6, characterized in that, The battery status receiving module (220) is used to determine the first status based on the first waveform signal, or to determine the second status based on the second waveform signal, or to determine the third status based on the third waveform signal.

8. The mobile power supply status monitoring system according to any one of claims 1 to 7, characterized in that, The battery status information is determined by the battery management system based on the battery's current, voltage, and SOC.

9. A method for monitoring the status of a mobile power bank, characterized in that, The method is applied to the mobile power supply status monitoring system according to any one of claims 1 to 8, and the method includes: Get battery status; A corresponding first signal is determined based on the battery state; the first signal is a voltage signal, a frequency signal, or a waveform signal. The first signal is sent to the electric excavator so that the electric excavator receives the first signal and switches to the battery state.

10. An electric excavator, characterized in that, The invention includes a portable power source that provides power to an electric excavator, and a portable power source status monitoring system as described in any one of claims 1 to 8.

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