Elevator emergency lead-acid battery life analysis method and system

Abstract

The invention provides an elevator emergency lead-acid battery life analysis method and system, and relates to the technical field of elevator emergency power supply. According to the method, different use discontinuities of lead-acid batteries are divided into transportation and storage discontinuities, battery charging discontinuities, battery discharging discontinuities and battery standing discontinuities; according to different interruption conditions and in combination with the indexes influencing the service life of the battery in the elevator emergency power supply scene, the loss service life of the battery is calculated and summarized to obtain the total loss service life, the emergency battery does not need to be thoroughly discharged, and the emergency battery and normal use cannot be influenced; the service life of the elevator emergency lead-acid battery can be simply, conveniently, efficiently and accurately obtained, the effectiveness of the elevator emergency battery is ensured, the elevator emergency battery can normally supply power in an emergency scene, and the elevator safety is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator emergency power supply, and in particular to an elevator emergency lead-acid battery life analysis and system. Background Art

[0002] Currently, the lifespan of lead-acid batteries is almost always calculated by completely discharging them. This wastes a lot of energy for large-capacity batteries. Furthermore, discharged batteries need to be fully charged before use, which takes a lot of time. During the charging process, the emergency power supply may not be available, affecting its use.

[0003] High-power emergency power supplies for elevators typically use lead-acid batteries. During use, it's impossible to fully discharge the battery to determine its lifespan. Therefore, battery lifespan calculations aren't performed in the elevator industry. At most, a replacement date is assigned based on the battery's age. However, battery lifespans vary significantly across different environments, making it difficult to accurately predict the lifespan. Emergency power supplies vary depending on the environment, such as the lower temperatures in the north compared to the south. However, depending on usage, such as equipment used in a relatively high number of emergency situations, battery lifespans can be shortened.

[0004] In short, the existing lead-acid battery life calculation (complete discharge) consumes energy and time for large-capacity batteries and affects their use. The elevator emergency power supply cannot use this to know the life span. It is not accurate to mark the replacement period only by the usage time. Moreover, due to large differences in environment and methods, it is impossible to accurately display the life status.

[0005] To this end, it is necessary to accurately obtain the life status of the elevator emergency battery and provide users with a reasonable time to replace the battery to ensure the effectiveness of the elevator emergency battery. Summary of the Invention

[0006] To solve the above problems, the purpose of the present invention is to provide an elevator emergency lead-acid battery life analysis and system, so that the life of the elevator emergency lead-acid battery can be obtained simply, efficiently and accurately without completely discharging the emergency battery.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a life analysis method for an elevator emergency lead-acid battery, including: S1. dividing the different usage interruptions of the lead-acid battery into battery transportation and storage interruptions, battery charging interruptions, battery discharging interruptions and battery static interruptions; S2. calculating the lost life of the lead-acid battery of each interruption according to different interruption conditions and in combination with indicators affecting battery life in the elevator emergency power supply scenario, and obtaining the life loss results of each interruption; S3. summarizing the life loss results of all interruptions to calculate the total life loss.

[0009] The present invention provides a preferred solution in a first aspect. In S2, the indicators affecting the battery life in the elevator emergency power supply scenario include: the operating temperature of the battery, the depth of discharge of the battery, and the charging time of the battery.

[0010] In the first aspect, the present invention provides a preferred solution. In S2, based on the interruptions in battery transportation and storage and battery static interruptions in which the high ambient temperature of the battery will accelerate the loss of battery life, the battery life loss caused by the battery transportation and storage interruptions and the battery static interruptions is calculated.

[0011] In a first aspect, the present invention provides a preferred solution for calculating the life loss of the battery during charging interruption based on the fact that the battery life during charging is much shorter than the interruption when the battery is at rest.

[0012] In a first aspect, the present invention provides a preferred solution for calculating the life loss of the battery discharge interruption according to the interruption condition of the battery emergency discharge characteristics affecting the battery life.

[0013] In a second aspect, the present invention provides an elevator emergency lead-acid battery life analysis system, comprising: an interruption division module for dividing different usage interruptions of lead-acid batteries into battery transportation and storage interruptions, battery charging interruptions, battery discharging interruptions and battery static interruptions; an interruption life loss calculation module for calculating the lost life of the lead-acid battery of each interruption according to different interruption conditions and in combination with indicators affecting battery life in elevator emergency power supply scenarios, and obtaining life loss results for each interruption; a total life loss calculation module for summarizing the life loss results of all interruptions to calculate the total life loss; a clock module for accurately providing the time of each interruption; a temperature module for accurately obtaining the ambient temperature during operation; and a prompt module for prompting and displaying the battery life status.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The present invention provides an elevator emergency lead-acid battery life analysis and system, which divides different usage interruptions of lead-acid batteries into transportation and storage interruptions, battery charging interruptions, battery discharging interruptions and battery static interruptions. According to different interruption conditions and in combination with indicators affecting battery life in elevator emergency power supply scenarios, the battery's lost life is calculated respectively, and the total lost life is obtained after aggregation. There is no need to completely discharge the emergency battery, and there will be no impact on the emergency battery itself and normal use. The life of the elevator emergency lead-acid battery can be obtained simply, efficiently and accurately, thereby ensuring the effectiveness of the elevator emergency battery, enabling the elevator emergency battery to supply power normally in emergency scenarios, and effectively improving elevator safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 A step diagram of a method for analyzing the life of an elevator emergency lead-acid battery provided by a specific embodiment of the present invention;

[0018] Figure 2 This is a module composition diagram of an elevator emergency lead-acid battery life analysis system provided by a specific embodiment of the present invention;

[0019] The reference numerals are as follows: intermittent division module 1 , intermittent life loss calculation module 2 , total life loss calculation module 3 , clock module 4 , temperature module 5 , prompt module 6 , current sampling module 7 . DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Please refer to Figure 1 One implementation provides a life analysis method for elevator emergency lead-acid batteries. This method primarily categorizes lead-acid batteries by usage interval: transportation and storage intervals, battery charging intervals, battery discharging intervals, and battery static intervals. The battery's lost life is calculated for each of these intervals and ultimately aggregated to obtain the total lost life. Specifically, this is achieved through the following steps:

[0022] S1. Different usage intervals of lead-acid batteries are divided into battery transportation and storage intervals, battery charging intervals, battery discharging intervals and battery static intervals.

[0023] In the elevator field, the use of high-power emergency power supplies has special conditions such as fewer charge and discharge times, larger discharge current and higher ambient temperature. Therefore, the indicators that affect the lifespan are mainly: battery operating temperature, battery discharge depth, and battery charging time.

[0024] S2. Based on different interruption conditions and in combination with indicators that affect battery life in elevator emergency power supply scenarios, the lost life of the lead-acid battery for each interruption is calculated to obtain the life loss results for each interruption.

[0025] If the ambient temperature of the battery is too high, it will accelerate the loss of battery life. The calculation formula for the loss of battery life during transportation and storage and when the battery is stationary is:

[0026]

[0027] in, The acceleration factor according to temperature is a life loss coefficient formed by the ratio of the total life of the battery when it is stationary to the stationary time of the battery. sto is the total time of transportation and storage process, in hours, t lif is the total life of the battery in hours, E a is the battery activation energy, k is the Boltzmann constant (8.617×10 - 5 eV / K), T k is the temperature at 25°C (Kelvin value is 298), T sto The temperature during transportation, storage or standing. Before the battery is actually put into use, it will go through a relatively long storage and transportation time. During this process, the system is in a non-working state and therefore cannot be calculated. Therefore, a start time will be set during factory commissioning. When the product is powered on at the use site, t will be calculated based on the current clock time of the device. sto This process cannot obtain the real-time ambient temperature of the battery. Based on the actual geographical location and time period, the historical average temperature of the area is used as the actual temperature of the interval. If the temperature is less than 25°C, it is 25°C.

[0028] The battery life is different when the battery is charging and when it is at rest. The battery life when charging is much shorter than the battery life when it is at rest. Therefore, the calculation formula for the battery life loss due to intermittent charging is:

[0029]

[0030] in, The acceleration factor according to temperature is a life loss coefficient formed by the ratio of the total life of the battery during operation to the charging time of the battery. cha The interval time for calculating the life of the battery during charging, in hours, t ual is the battery life in hours, E a is the battery activation energy, k is the Boltzmann constant (8.617×10 -5 eV / K), T k is the temperature at 25°C (Kelvin value is 298), T cha Temperature when charging the battery.

[0031] When an elevator is in emergency operation, the time is usually very short, only a few minutes, but the current is very large, which will also affect the service life of the battery. Therefore, the calculation formula for the life loss during battery discharge interruption is:

[0032]

[0033] Among them, C dsc is the total amount of discharge, C tol ck is the total charge of the battery corresponding to the discharge current, ck is the discharge loss coefficient, which is determined by the discharge current; the larger the discharge current, the larger the value, and N is the total number of discharges. The depth of discharge is calculated based on the battery's discharge capacity, and the battery's discharge loss coefficient is then used to determine the loss of battery life caused by this discharge.

[0034] S3. Summarize the life loss results of all the discontinuities and calculate the total life loss.

[0035] During the use of this system, the life loss in different use processes is calculated according to different use states. The calculation formula for the total life loss is:

[0036]

[0037] Among them, L sto L is the life loss of battery due to interruption in transportation and storage and interruption in battery standing. cha The loss of battery life due to intermittent charging, L dsc This is the loss of battery life due to intermittent discharge. This is used to calculate the battery's current lifespan. A value greater than 1 indicates the battery has reached its end of life. This can be indicated by the system's notification device.

[0038] Please refer to Figure 2 Correspondingly, in one embodiment, a life analysis system for an elevator emergency lead-acid battery is provided, which mainly comprises the following modules:

[0039] Interval classification module 1 is used to classify different usage intervals of lead-acid batteries into battery transportation and storage intervals, battery charging intervals, battery discharging intervals and battery static intervals;

[0040] Intermittent life loss calculation module 2 is used to calculate the lost life of the lead-acid battery for each interruption based on different interruption conditions and combined with indicators affecting battery life in the elevator emergency power supply scenario, and obtain the life loss results for each interruption;

[0041] The total life loss calculation module 3 is used to summarize the life loss results of all interruptions to calculate the total life loss.

[0042] On this basis, the elevator emergency lead-acid battery life analysis system of this embodiment also has the following modules:

[0043] The clock module 4 is used to accurately provide the time of each interruption.

[0044] The temperature module 5 is used to accurately obtain the ambient temperature during operation.

[0045] The prompt module 6 is used to prompt and display the battery life status.

[0046] The current sampling module 7 is used to sample the battery's discharge current. During the discharge process, the current sampling is used to calculate the actual discharge amount and the battery life loss. Since the battery is in a 5C or even higher discharge state, the battery life loss is significant, so timely calculation is required.

[0047] Based on the above reasons, the present invention, based on the above embodiments, can achieve the following beneficial technical effects compared with the prior art:

[0048] (1) The present invention provides an elevator emergency lead-acid battery life analysis and system, which divides the different usage interruptions of the lead-acid battery into transportation and storage interruptions, battery charging interruptions, battery discharging interruptions and battery static interruptions. The battery loss life is calculated according to different interruption conditions, and the total loss life is obtained after aggregation. There is no need to completely discharge the emergency battery, and it will not affect the emergency battery itself and normal use. The life of the elevator emergency lead-acid battery can be obtained simply, efficiently and accurately, ensuring the effectiveness of the elevator emergency battery, so that the elevator emergency battery can supply power normally in emergency scenarios, and effectively improving the safety of the elevator.

[0049] (2) The present invention can accurately provide the time of each interruption through the system's clock module. The ambient temperature during operation can be accurately obtained through the temperature module. Based on these two modules and the temperature acceleration calculation method, the actual life loss of the battery can be effectively calculated. Especially during transportation and storage interruptions, since the transportation and storage status of the elevator is realized, that is, the main storage time is at the use site, the actual geographical location and time period are used to determine the temperature indicator. Furthermore, the battery life status can be displayed through the prompt module, making it easier for users to replace the battery.

[0050] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0051] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above-described embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. For those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A method for analyzing the life of an elevator emergency lead-acid battery, characterized in that: include: S1. Different usage intervals of lead-acid batteries are divided into battery transportation and storage intervals, battery charging intervals, battery discharging intervals and battery static intervals; S2. Calculate the life loss of the lead-acid battery for each interruption based on different interruption scenarios and the indicators that affect battery life in elevator emergency power supply scenarios, and obtain the life loss results for each interruption; S3. Summarize the life loss results of all the discontinuities and calculate the total life loss.

2. The elevator emergency lead-acid battery life analysis method according to claim 1, characterized in that: In S2, the indicators that affect the battery life in the elevator emergency power supply scenario include: the operating temperature of the battery, the depth of discharge of the battery, and the charging time of the battery.

3. The elevator emergency lead-acid battery life analysis method according to claim 2, characterized in that: In S2, the battery life loss due to the battery transportation and storage interruptions and the battery rest interruptions is calculated based on the interruptions in which the high ambient temperature of the battery will accelerate the loss of battery life.

4. The elevator emergency lead-acid battery life analysis method according to claim 2, characterized in that: According to the fact that the life of the battery during the battery charging interruption is much shorter than the interruption when the battery is at rest, the life loss of the battery during the battery charging interruption is calculated.

5. The elevator emergency lead-acid battery life analysis method according to claim 2, characterized in that: The life loss of the battery due to the battery emergency discharge interruption is calculated according to the interruption condition in which the battery life is affected by the characteristics of the battery emergency discharge during the battery discharge interruption.

6. The elevator emergency lead-acid battery life analysis method according to claim 1 or 3, characterized in that: The calculation formula for the life loss of the battery due to the interruption of battery transportation and storage and the interruption of battery static state is: in, is the acceleration factor according to temperature, t sto is the total time of transportation and storage process, in hours, t lif is the total life of the battery in hours, E a is the battery activation energy, k is the Boltzmann constant, T k The temperature is 25℃, T sto The temperature during transportation, storage or standing.

7. The elevator emergency lead-acid battery life analysis method according to claim 1 or 4, characterized in that: The calculation formula for the battery life loss due to intermittent charging is: in, is the acceleration factor according to temperature, t cha The interval time for calculating the life of the battery during charging, in hours, t ual E is the battery life in hours. a is the battery activation energy, k is the Boltzmann constant, T k The temperature is 25℃, T cha Temperature when charging the battery.

8. The elevator emergency lead-acid battery life analysis method according to claim 1 or 5, characterized in that: The calculation formula for the battery life loss due to discontinuous discharge is: Among them, C dsc is the total amount of discharge, C tol is the total capacity of the battery corresponding to the discharge current, ck is the discharge loss coefficient, and N is the total number of discharges.

9. The elevator emergency lead-acid battery life analysis method according to claim 1, characterized in that: In S3, the total life loss is calculated as: Among them, L sto L is the life loss of battery due to interruption in transportation and storage and interruption in battery standing. cha The loss of battery life due to intermittent charging, L dsc The loss of battery life due to intermittent discharge.

10. An elevator emergency lead-acid battery life analysis system, characterized in that: include: The interval classification module is used to classify the different usage intervals of lead-acid batteries into battery transportation and storage intervals, battery charging intervals, battery discharging intervals and battery static intervals; The intermittent life loss calculation module is used to calculate the life loss of lead-acid batteries for each interruption based on different interruption conditions and combined with indicators affecting battery life in elevator emergency power supply scenarios, and obtain the life loss results for each interruption; The total life loss calculation module is used to summarize the life loss results of all interruptions and calculate the total life loss; Clock module, used to accurately provide the time of each interval; Temperature module, used to accurately obtain the ambient temperature during operation; Prompt module, used to prompt and display the battery life status; The current sampling module is used to sample the discharge current of the battery.

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