An environmental temperature-based power calculation device

Abstract

The utility model relates to electric quantity calculation and algorithm modeling technical field especially relates to a kind of electric quantity calculation device based on ambient temperature, comprising: handle body, temperature sensing unit, main control module and handle display unit, the temperature sensing unit is set in handle body interior, the main control module is embedded in the inside of handle body, with temperature sensing unit and vehicle battery are connected, the handle display unit is integrated in handle body surface, with The main control module is connected. The utility model has pre-stored battery power-temperature two-dimensional lookup table and temperature-voltage-SOC three-dimensional lookup table, the effective discharge capacity value under different ambient temperature is inquired, the electric quantity calculation result is dynamically calibrated, and the SOC value after temperature compensation is obtained;Meanwhile, vibration motor is configured, and tactile alarm prompt is touched when exceeding safety operation threshold, and battery fault is promptly ascertained.

Description

Technical Field

[0001] This utility model relates to the field of power calculation and algorithm modeling technology, and in particular to a power calculation device based on ambient temperature. Background Technology

[0002] In the field of industrial vehicles (such as electric forklifts), the accuracy of the battery charge display of lead-acid or lithium-ion batteries has a critical impact on work planning, equipment utilization efficiency, and operational safety. However, the current battery charge display methods of most industrial vehicles have obvious limitations, relying solely on battery voltage detection or simple ampere-hour integration to calculate the charge. Furthermore, the working environment of industrial vehicles is relatively harsh, and the impact of ambient temperature on the actual battery capacity is not taken into account, resulting in a large deviation between the charge data and the actual situation.

[0003] Chinese patent CN222408004U discloses an electric bicycle battery pack with a fuel gauge function, including a hollow housing, a display screen, and a battery pack, a power sensor, a temperature sensor, a current sensor, and a battery management chip connected to the power sensor, the temperature sensor, and the current sensor respectively, so as to enable users to better understand the battery charging status (SOC) and battery health status (SOH), thereby avoiding safety accidents caused by the battery pack operating in an unhealthy state.

[0004] However, this technical solution cannot intelligently calculate the effective capacity of the battery based on the detected temperature, thus failing to address the impact of ambient temperature on the actual battery capacity. Furthermore, it lacks an alarm notification unit, which can easily lead to delayed detection of faults due to operator inattention, resulting in damage to the vehicle battery or a shortened lifespan. Utility Model Content

[0005] To address the issues of ambient temperature affecting battery capacity and the lack of alarm prompts in the aforementioned solutions, this invention provides a battery capacity calculation device based on ambient temperature. It pre-stores a two-dimensional lookup table (battery capacity - temperature) and a three-dimensional lookup table (temperature - voltage - SOC). By querying the effective discharge capacity value under different ambient temperatures, the device dynamically calibrates the battery capacity calculation results to obtain a temperature-compensated SOC value. Simultaneously, it is equipped with a vibration motor that provides a tactile alarm when the safe operating threshold is exceeded, allowing for timely identification of battery faults.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A power calculation device based on ambient temperature, comprising: handle body; A temperature sensing unit is disposed on the handle body and is used to collect ambient temperature data of the handle operation area. The main control module is embedded inside the handle body and connected to the temperature sensing unit and the vehicle battery. It is used to receive ambient temperature data and battery voltage data and calculate the remaining battery power. The handle display unit is integrated on the surface of the handle body and connected to the main control module, and is used to display the remaining battery power value in real time.

[0007] As an improvement, the temperature sensing unit is a surface-mount NTC thermistor or a digital temperature sensor.

[0008] As an improvement, the main control module pre-stores a two-dimensional lookup table modeled on the relationship between battery charge and temperature.

[0009] As an improvement, the main control module pre-stores a three-dimensional lookup table modeled on the relationship between temperature, voltage, and SOC.

[0010] As an improvement, the main control module directly obtains the compensated SOC value through a three-dimensional lookup table and interpolation algorithm.

[0011] As an improvement, the handle display unit includes a set of LED indicators and an LCD screen.

[0012] As an improvement, the LED indicator is a multi-color indicator that uses color (green, yellow, red) and flashing frequency to indicate the power range and alarm information.

[0013] As an improvement, the LCD screen is a miniature screen that displays a digital percentage and estimated working time.

[0014] As an improvement, the power calculation device also includes a vibration motor connected to the main control module.

[0015] The beneficial effects of this utility model are as follows: (1) This utility model uses a patch-type NTC thermistor or a digital temperature sensor as the temperature sensing unit. The two types of sensors cover different accuracy requirements and can be flexibly selected according to the vehicle battery type (such as lead-acid battery or lithium battery) to ensure that the ambient temperature of the handle operation area collected can truly reflect the temperature scenario of the battery operation and provide reliable temperature data for subsequent compensation calculation.

[0016] (2) This utility model directly incorporates the influence of temperature on battery capacity into the model through a pre-stored two-dimensional lookup table of temperature-capacity and a three-dimensional lookup table of temperature-voltage-SOC. It can intuitively query the effective discharge capacity value under different ambient temperatures, dynamically calibrate the calculation results of the ampere-hour integration method, and directly obtain the compensated SOC value through table lookup and interpolation algorithms to eliminate the influence of temperature on voltage.

[0017] (3) This utility model uses LED indicator lights and LCD screen as display units, which can obtain the power status in real time and accurately plan the remaining work according to the expected working time.

[0018] (4) This utility model uses a vibration motor linked with the main control module. When the SOC is lower than the safe operating threshold, even if the operator does not pay attention to the indicator light or screen, the vibration can actively remind the user through the touch of the handle, reducing the risk of equipment shutdown due to power depletion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance of the present utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram showing the installation position of the vibration motor in this utility model; Figure 4 This is a schematic diagram illustrating the working principle of this utility model; Explanation of reference numerals in the attached figures: 1. Handle body; 2. Temperature sensing unit; 3. Main control module; 4. Handle display unit; 41. LED indicator; 42. LCD screen; 5. Vibration motor; Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example 1 This embodiment takes a lithium-ion forklift as an example. A temperature sensing unit is embedded inside the handle shell. Its probe faces the handle base through thermally conductive silicone to sense the ambient temperature rather than the hand temperature. The main control module uses a low-power ARM Cortex-M0 chip and pre-stores the two-dimensional lookup table and three-dimensional lookup table of the lithium battery of the vehicle. The display unit consists of a three-color LED light strip (green / yellow / red) on the top of the handle and a miniature LCD screen on the surface of the handle. A vibration motor is configured inside the handle.

[0022] like Figure 1-2 As shown, this embodiment provides a power calculation device based on ambient temperature, specifically including: a handle body 1, a temperature sensing unit 2, a main control module 3, and a handle display unit 4.

[0023] The temperature sensing unit 2 is located inside the handle body 1, or it can be located on the back of the grip area to avoid the influence of temperature when the hand is holding it, and is used to collect ambient temperature data of the handle operation area.

[0024] Preferably, the temperature sensing unit 2 is a surface-mount NTC thermistor or a digital temperature sensor. The surface-mount design is suitable for the compact space inside the handle body 1, making installation convenient and not affecting the operation of the handle. In addition, the NTC thermistor is low in cost, fast in response, and can accurately collect temperature data. The digital temperature sensor has high measurement accuracy, outputs a digital signal, has stronger anti-interference ability, and can stably collect temperature data.

[0025] The main control module 3 is embedded inside the handle body 1 and is connected to the temperature sensing unit 2 and the vehicle battery. It is used to receive ambient temperature data and battery voltage data and calculate the actual remaining battery power.

[0026] The main control module 3 contains a two-dimensional lookup table modeled on the relationship between battery capacity and temperature. It pre-determines the effective discharge capacity of the battery model under different ambient temperatures through experiments. The main control module 3 queries the effective capacity corresponding to the current temperature, combines it with the ampere-hour integration method, and dynamically calibrates the calculated result to calculate the remaining battery capacity after temperature compensation. It adjusts the available capacity used in the calculation in real time, making up for the shortcomings of the ampere-hour integration method and reducing the impact of temperature on the estimation.

[0027] Preferably, the main control module 3 has a three-dimensional lookup table pre-stored based on the relationship between temperature, voltage, and SOC. The main control module 3 synchronously collects battery voltage and receives temperature data from the temperature sensing unit 2, and directly obtains the compensated SOC value through table lookup and interpolation algorithms. The calculation process is simple and fast, meeting the requirements for real-time display.

[0028] It is worth noting that the "battery capacity-temperature model" and the "temperature-voltage-SOC model" were established through a large number of experiments for the battery models of the vehicles that need to be tested. The mapping relationship between temperature and capacity, internal resistance and voltage is clearly defined. Through a pre-stored customized lookup table, different batteries can be easily adapted.

[0029] The handle display unit 4 is integrated on the surface of the handle body 1, eliminating the need for additional installation space in other parts of the vehicle body. This reduces the overall size of the device and lowers the hardware cost and assembly process of installing an additional display screen. The handle display unit 4 is connected to the main control module 3 and can display the remaining battery power in real time.

[0030] More specifically, the handle display unit 4 includes a set of LED indicator lights 41 and an LCD screen 42. Preferably, the LED indicator lights 41 are multi-color indicator lights, which use green, yellow, and red colors and flashing frequency to indicate the battery level range and alarm information. The three colors, green, yellow, and red, correspond to the safe, transitional, and dangerous battery states, respectively. The flashing frequency provides dynamic alarm prompts. For example, a solid red light indicates low battery (e.g., 20%-30%), and a rapidly flashing red light indicates extremely low battery (e.g., 0%-20%). This can prompt the operator about the battery status as much as possible and reduce the risk caused by battery depletion.

[0031] Preferably, the LCD screen 42 is a miniature screen that can clearly display numerical percentages and estimated working time, which helps operators obtain key information more quickly.

[0032] Preferred, such as Figure 3As shown, the power calculation device also includes a vibration motor 5, which is connected to the main control module 3 to provide operators with non-visual active reminders. Through the active reminders via the tactile feedback of the handle, the risk of equipment shutdown due to power depletion can be reduced.

[0033] Work process (1) Temperature sensing unit 2: acquires the real ambient temperature and transmits the collected temperature signal to the main control module 3 in real time; (2) Main control module 3: synchronously receives ambient temperature data from temperature sensing unit 2 and real-time voltage data from vehicle battery, and calculates based on pre-stored customized lookup table (two-dimensional or three-dimensional model): using the "battery power-temperature" two-dimensional table, combined with the ampere-hour integration method (to calculate the cumulative value of battery charging and discharging current), calibrating the theoretical capacity with ambient temperature, correcting the capacity deviation caused by temperature, and outputting the compensated remaining power (SOC); using the "temperature-voltage-SOC" three-dimensional table, directly looking up the table through temperature and voltage data and interpolation algorithm, quickly locating the corresponding SOC value, and synchronously sending the calculated accurate SOC value (including digital percentage and estimated working time) to the handle display unit 4, and at the same time determining whether to trigger the vibration motor based on the SOC threshold (such as below 20%). (3) Handle display unit 4: LED indicator 41 receives the SOC threshold signal from the main control module 3 and uses color and flashing frequency to intuitively convey the power status - green corresponds to safe power (e.g., above 50%), yellow corresponds to transitional power (30%-50%), red solid corresponds to low power (e.g., 20%-30%), red flashing corresponds to extremely low power (e.g., below 20%); LCD screen 42 receives the specific SOC value output by the main control module 3 and displays the digital percentage and estimated working time; (4) Vibration motor 5: When the main control module 3 determines that the SOC is lower than the set threshold (e.g., 20%), it immediately triggers the vibration motor 5 to vibrate three times in a row, prompting the operator to return to the charging area immediately.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power calculation device based on ambient temperature, characterized in that, include: handle body; A temperature sensing unit is disposed on the handle body and is used to collect ambient temperature data of the handle operation area. The main control module is embedded inside the handle body and connected to the temperature sensing unit and the vehicle battery. It is used to receive ambient temperature data and battery voltage data and calculate the remaining battery power. The handle display unit is integrated on the surface of the handle body and connected to the main control module, and is used to display the remaining battery power value in real time.

2. The power calculation device based on ambient temperature according to claim 1, characterized in that, The temperature sensing unit is a surface-mount NTC thermistor or a digital temperature sensor.

3. The power calculation device based on ambient temperature according to claim 1, characterized in that, The main control module contains a two-dimensional lookup table modeled on the relationship between battery power and temperature.

4. The power calculation device based on ambient temperature according to claim 1, characterized in that, The main control module has a pre-stored three-dimensional lookup table modeled on the relationship between temperature, voltage, and SOC.

5. The power calculation device based on ambient temperature according to claim 1, characterized in that, The main control module directly obtains the compensated SOC value through a three-dimensional lookup table and interpolation algorithm.

6. The power calculation device based on ambient temperature according to claim 1, characterized in that, The handle display unit includes a set of LED indicators and an LCD screen.

7. The power calculation device based on ambient temperature according to claim 6, characterized in that, The LED indicator is a multi-color indicator that uses color and flashing frequency to indicate the power range and alarm information.

8. The power calculation device based on ambient temperature according to claim 6, characterized in that, The LCD screen is a miniature screen that displays a digital percentage and estimated working time.

9. The power calculation device based on ambient temperature according to claim 1, characterized in that, The power calculation device also includes a vibration motor, which is connected to the main control module.

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