阅读说明：本技术 电动工程机械能耗测试方法 (Method for testing energy consumption of electric engineering machinery ) 是由 王世阳 耿家文 王飞 张文远 王彦飞 张将 李闯 居世昊 于 2021-08-30 设计创作，主要内容包括：本公开涉及一种电动工程机械能耗测试方法,包括：获取电动工程机械分别在不同工况下对应的用时占比系数X-(1)、X-(2)、X-(3)、···和X-(N)；对每一工况开展时长相同的能耗测试,得到每一工况动力电池输出端能耗Q-(1)、Q-(2)、Q-(3)、···和Q-(N)；利用加权平均法计算试验时间内动力电池输出端综合耗电量：Qs＝Q-(1)×X-(1)+Q-(2)×X-(2)+Q-(3)×X-(3)+···+Q-(N)×X-(N)；以及根据Qs计算动力电池单位时间输出端综合耗电量Q-(T),计算电动工程机械单位时间耗电量Q＝Q-(T)/η,η为动力电池的充放电效率。本方法考虑了动力电池在充放电过程中的能量损耗,更符合电动工程机械实际能耗情况,能够准确检测电动工程机械的能耗。(The disclosure relates to a method for testing energy consumption of electric engineering machinery, which comprises the following steps: obtaining the time-consuming ratio coefficient X of the electric engineering machinery respectively corresponding to different working conditions 1 、X 2 、X 3 And X N (ii) a Carrying out energy consumption tests with the same duration on each working condition to obtain energy consumption Q of the power battery output end of each working condition 1 、Q 2 、Q 3 And Q N (ii) a And calculating the comprehensive power consumption of the output end of the power battery in the test time by using a weighted average method: qs is Q 1 ×X 1 +Q 2 ×X 2 +Q 3 ×X 3 +···+Q N ×X N (ii) a And calculating the comprehensive power consumption Q of the output end of the power battery in unit time according to the Qs T Calculating the power consumption Q of the electric engineering machinery in unit time T And eta are the charge and discharge efficiency of the power battery. The method considers the energy loss of the power battery in the charging and discharging process, and is more in line with the electric engineeringThe actual energy consumption condition of the machine can accurately detect the energy consumption of the electric engineering machine.)

1. An electric engineering machinery energy consumption testing method comprises the following steps:

obtaining the time-consuming ratio coefficient X of the electric engineering machinery respectively corresponding to different working conditions₁、X₂、X₃And X_N；

Carrying out energy consumption tests with the same duration on each working condition to obtain energy consumption Q of the power battery output end of each working condition₁、Q₂、Q₃And Q_N；

And calculating the comprehensive power consumption of the output end of the power battery in the test time by using a weighted average method:

Qs＝Q₁×X₁+Q₂×X₂+Q₃×X₃+···+Q_N×X_N(ii) a And

calculating the comprehensive power consumption Q of the output end of the power battery in unit time according to the Qs_TCalculating the power consumption Q of the electric engineering machinery in unit time_TAnd eta, wherein eta is the charge and discharge efficiency of the power battery.

2. The method for testing energy consumption of electric engineering machinery according to claim 1, wherein the electric engineering machinery respectively corresponds to time-consuming ratio coefficients X under different working conditions₁、X₂、X₃And X_NBy using big data acquisition.

3. The electrical engineering machine energy consumption testing method of claim 1, wherein the electrical engineering machine is configured as an electrical excavator having an excavation loading condition, a leveling condition, a walking condition and an idling condition.

4. The electrical engineering machine energy consumption testing method of claim 1, wherein the charge-discharge efficiency is obtained by the following steps:

charging the electric construction machine from the discharge cutoff voltage to the charge cutoff voltage to obtain a charge quantity Q₁；

Discharging the electric engineering machine from the charge cut-off voltage to the discharge cut-off voltage to obtain a discharge quantity Q₂Calculating the charging and discharging efficiency eta of the electric engineering machinery as Q₂/Q₁。

5. The electrical engineering machine energy consumption testing method of claim 1, wherein the electric quantity of the power battery is charged to more than 90% before the energy consumption test with the same duration is performed for each working condition.

6. The electrical engineering machine energy consumption testing method of claim 1, wherein the remaining capacity of the power battery is greater than 20% after the same duration of energy consumption testing is performed for each operating condition.

7. The electrical engineering machine energy consumption testing method of claim 1, wherein the power battery is not charged during the same duration of energy consumption testing for each operating condition.

8. The electrical engineering machine energy consumption testing method of claim 1, wherein the energy consumption testing duration for each operating condition is configured to be more than 10 min.

9. The electrical engineering machine energy consumption testing method of claim 1, wherein the test environment temperature is maintained at 20 ℃ to 30 ℃.

10. The electrical engineering machine energy consumption testing method of claim 1, wherein the temperature difference of the test environment is not more than 5 ℃.

Technical Field

The disclosure relates to an electric engineering machinery energy consumption testing method.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

In recent years, along with the increasing importance of the nation on energy conservation and emission reduction, the electric technology is mature continuously, the market acceptance is improved continuously, and each host factory has more and more importance on electric engineering machinery plates. The energy consumption test is one of the most important test items of the electric engineering machinery, no relevant national standard or enterprise standard exists at present, each host factory mainly adopts a single working condition to observe and record the electric quantity change of an instrument to calculate the energy consumption, the display error of the instrument is overlarge, the energy consumption in the charging and discharging process of a power battery is not considered, and the single working condition test value is inconsistent with the actual use condition of a user.

Disclosure of Invention

One technical problem to be solved by the present disclosure is: based on the fact that the electric engineering machinery instrument displays too large electric quantity change error, the electric engineering machinery energy consumption testing method can accurately detect the energy consumption of the electric engineering machinery.

According to some embodiments of the present disclosure, a method for testing energy consumption of an electrical engineering machine is provided, including:

obtaining the time-consuming ratio coefficient X of the electric engineering machinery respectively corresponding to different working conditions₁、X₂、X₃And X_N；

Carrying out energy consumption tests with the same duration on each working condition to obtain energy consumption Q of the power battery output end of each working condition₁、Q₂、Q₃And Q_N；

And calculating the comprehensive power consumption of the output end of the power battery in the test time by using a weighted average method: qs is Q₁×X₁+Q₂×X₂+Q₃×X₃+···+Q_N×X_N(ii) a And

calculating the comprehensive power consumption Q of the output end of the power battery in unit time according to the Qs_TCalculating the power consumption Q of the electric engineering machinery in unit time_TAnd eta, wherein eta is the charge and discharge efficiency of the power battery.

In some embodiments, the electric engineering machine respectively corresponds to the time-use ratio coefficient X under different working conditions₁、X₂、X₃And X_NBy using big data acquisition.

In some embodiments, the electric work machine is configured as an electric excavator having an excavation loading condition, a grading condition, a walking condition, and an idle condition.

In some embodiments, the charge-discharge efficiency is obtained by:

charging the electric construction machine from the discharge cutoff voltage to the charge cutoff voltage to obtain a charge quantity Q₁；

Discharging the electric engineering machine from the charge cut-off voltage to the discharge cut-off voltage to obtain a discharge quantity Q₂Calculating the charging and discharging efficiency eta of the electric engineering machinery as Q₂/Q₁。

In some embodiments, the power cell is charged to more than 90% before the same duration of energy consumption testing is performed for each operating condition.

In some embodiments, the remaining capacity of the power cell is greater than 20% after the same duration of energy consumption testing is performed for each operating condition.

In some embodiments, the power cell is not charged during the same duration of the energy consumption test for each operating condition.

In some embodiments, the energy consumption test duration for each operating condition is configured to be greater than 10 min.

In some embodiments, the test ambient temperature is maintained between 20 ℃ and 30 ℃.

In some embodiments, the test environment temperature difference does not exceed 5 ℃.

According to the technical scheme, the time-consuming ratio coefficients of the electric engineering machinery respectively corresponding to different working conditions are obtained, energy consumption of the output end of the power battery under each working condition is tested by carrying out energy consumption tests with the same time length on each working condition, the comprehensive power consumption of the output end of the power battery in the test time is calculated by using a weighted average method, the comprehensive power consumption of the output end of the power battery in unit time is obtained, the energy consumption of the power battery in the charging and discharging process is considered, the actual energy consumption condition of the electric engineering machinery is better met, and the energy consumption of the electric engineering machinery can be accurately detected.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of charging an electric excavator in some embodiments of the disclosed electric engineering machine energy consumption testing method;

FIG. 2 is a schematic diagram of discharging an electric excavator in some embodiments of the disclosed electric work machine energy consumption testing method;

fig. 3 is a flow diagram of some embodiments of the disclosed electrical engineering machine energy consumption testing method.

Description of the reference numerals

1. An energy consumption testing device; 2. a charging port of the excavator; 3. an electric excavator; 4. charging piles; 5. a power battery discharge port; 6. and a power battery.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

According to some embodiments of the present disclosure, a method for testing energy consumption of an electrical engineering machine is provided, including:

obtaining the time-consuming ratio coefficient X of the electric engineering machinery respectively corresponding to different working conditions₁、X₂、X₃And X_N；

Carrying out energy consumption tests with the same duration on each working condition to obtain energy consumption Q of the power battery output end of each working condition₁、Q₂、Q₃And Q_N；

And calculating the comprehensive power consumption of the output end of the power battery in the test time by using a weighted average method: qs is Q₁×X₁+Q₂×X₂+Q₃×X₃+···+Q_N×X_N(ii) a And

calculating the comprehensive power consumption Q of the output end of the power battery in unit time according to the Qs_TCalculating the power consumption Q of the electric engineering machinery in unit time_TAnd eta, wherein eta is the charge and discharge efficiency of the power battery.

In the illustrative embodiment, the time-consuming ratio coefficients of the electric engineering machinery respectively corresponding to different working conditions are obtained, energy consumption tests with the same duration are carried out on each working condition, energy consumption of the output end of the power battery in each working condition is obtained, the comprehensive power consumption of the output end of the power battery in the test time is calculated by using a weighted average method, the comprehensive power consumption of the output end of the power battery in unit time is further obtained, the power consumption of the electric engineering machinery in unit time is obtained by considering the energy loss of the power battery in the charging and discharging process, and the energy consumption of the electric engineering machinery can be accurately detected.

In some embodiments, the electric engineering machine respectively corresponds to the time-use ratio coefficient X under different working conditions₁、X₂、X₃And X_NBy using big data acquisition. When the energy consumption test operation is carried out, the multi-working-condition time ratio of the electric engineering machinery is identified based on big data analysis, and a multi-working-condition comprehensive energy consumption evaluation method is adopted, so that the method is more scientific and accurate.

In some embodiments, the charge-discharge efficiency is obtained by:

charging the electric construction machine from the discharge cutoff voltage to the charge cutoff voltage to obtain a charge quantity Q₁；

Discharging the electric engineering machine from the charge cut-off voltage to the discharge cut-off voltage to obtain a discharge quantity Q₂Calculating the charging and discharging efficiency eta of the electric engineering machinery as Q₂/Q₁。

The charging and discharging efficiency eta obtained by the method is scientific and accurate and has higher implementability.

In order to ensure that the energy consumption test with the same duration can be carried out on each working condition in the primary discharging process of the power battery, in some embodiments, before the energy consumption test with the same duration is carried out on each working condition, the electric quantity of the power battery is charged to more than 90%, so that the accuracy of detecting the energy consumption of the electric engineering machinery is ensured.

Similarly, in order to ensure the discharge stability of the power battery in the testing process, in some embodiments, after the energy consumption test with the same duration is performed on each working condition, the remaining capacity of the power battery is greater than 20%, so as to ensure the accuracy of detecting the energy consumption of the electrical engineering machine.

In some embodiments, the power battery is not charged during the same duration of the energy consumption test for each operating condition to ensure accuracy in detecting energy consumption of the electrical engineering machine. Therefore, the energy consumption test duration of each working condition is selected to be very important, the duration is too short, the data stability is not good, the duration is too long, and the energy consumption test of each working condition cannot be completed in the primary discharge process of the power battery.

In some embodiments, the energy consumption test duration for each operating condition is configured to be more than 10min, so as to ensure the stability of the detection data.

To ensure the discharge stability of the power cell, in some embodiments, the test ambient temperature is maintained at 20 ℃ to 30 ℃.

To ensure consistency of chemical activity within the power cell during testing, in some embodiments, the temperature difference between the test environments does not exceed 5 ℃.

Referring to fig. 1 to fig. 3, the following describes an operation process of the electric engineering machine energy consumption testing method of the present disclosure by taking an electric engineering machine as an electric excavator as an example, as follows:

(1) the method comprises the steps of driving an electric excavator 3 to be close to a charging pile 4, discharging a power battery 6 to a discharging cut-off voltage, connecting an excavator charging port 2 of the electric excavator 3 with the charging pile, installing an energy consumption testing device 1 between the charging pile 4 and the power battery 6, charging the power battery to the charging cut-off voltage by rated current, and obtaining the charging quantity Q of the power battery₁The energy consumption testing device 1 can acquire the accumulated power consumption by acquiring circuit actual voltage and current signals;

(2) installing an energy consumption test device 1 at the output end of the power battery 6, namely a power battery discharge port 5, circularly working at a specific gear according to the duty ratio coefficient of each working condition, discharging the power battery 6, and discharging the electric quantity from the charge cut-off voltage to the discharge cut-off voltage to obtain the discharge quantity Q of the power battery₂；

(3) Calculating to obtain the charge-discharge efficiency eta of the electric excavator as Q₂/Q₁；

(4) Through big data analysis and comparison, the time-use ratio of the electric excavator under working conditions of digging, loading, leveling, walking, idling and the like is counted to obtain the ratio coefficient X of each working condition_{Digging machine}、X_{Flat plate}、X_{Line of}、X_Idling；

(5) The method comprises the steps of charging the electric quantity of an electric excavator to more than 90%, carrying out excavation loading, flat ground, walking and idling working condition test operation on the electric excavator in sequence at a specific gear, wherein the working condition operation time is the same, the test time is easily longer than 10 minutes, meanwhile, the residual electric quantity after the multi-working condition test is finished is required to be larger than 20%, the charging is not allowed in the test process, and the power consumption Q under each working condition is recorded by using a power battery output end energy consumption test device_{Digging machine}、Q_{Flat plate}、Q_{Line of}And Q_Idling；

(6) Calculating the comprehensive power consumption of the output end of the power battery of the excavator within a certain test time by using a weighted average method:

Q_s＝Q_{digging machine}×X_{Digging machine}+Q_{Flat plate}×X_{Flat plate}+Q_{Line of}×X_{Line of}+Q_Idling×X_Idling

(7) The comprehensive power consumption Q of the power battery of the electric excavator at the output end per unit time can be obtained through calculation_T；

(8) Finally, the power consumption per unit time Q of the electric excavator is obtained_T/η。

The electric engineering machinery energy consumption testing method disclosed by the invention has the following technical effects:

(1) the problem of testing the energy consumption of the electric engineering machinery is solved;

(2) the test is more rigorous and accurate, and the process energy consumption data is recorded by adopting an energy consumption testing device, so that the test error caused by subjective factors is avoided;

(3) the method needs no charging pile in the whole working condition test process except for the charging and discharging efficiency of the electric engineering machinery, so that the application range of the test method is widened;

(4) the method takes the energy loss caused by the charging and discharging process into consideration, and more accords with the actual energy consumption condition of the electric excavator;

(5) when the method is used for carrying out energy consumption test operation, the multi-working-condition time ratio of the electric engineering machinery is identified based on big data analysis, and a multi-working-condition comprehensive energy consumption evaluation method is adopted, so that the method is more scientific and accurate.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.