A battery monitoring IC controls a lamp display circuit

Abstract

The utility model relates to a battery monitoring IC control lamp display circuit, including battery package and BMS mainboard, BMS mainboard includes IC module, lamp display module and button, the output of battery package is linked with the power supply end of IC module, the output of battery package is linked with the power supply end of lamp display module, the input of battery package is linked with the collection end of IC module, the input of lamp display module is linked with the control end of IC module, lamp display module links with button. The utility model is not influenced by the dynamic change of battery voltage, avoids the brightness fluctuation problem from the root, ensures that the LED display brightness is even, stable under different electric quantity state, promotes user visual experience.

Description

Technical Field

[0001] This utility model relates to a battery monitoring IC control light display circuit, and more particularly to a control light display circuit based on the Saiwei CW2052BLBP battery monitoring IC. Background Technology

[0002] Currently, the battery pack power display accuracy of brushless DC tools is relatively low. A proper battery pack power display would allow users to intuitively know the remaining battery power, preventing work interruptions due to insufficient battery power.

[0003] Traditional BMS LED displays often use TL431 reference source control or Zener diode voltage divider control. These solutions rely on external voltage divider circuits to adjust the LED drive current, which is easily affected by dynamic changes in battery voltage (voltage fluctuations during discharge) and component parameter drift (such as temperature drift). This causes the LED brightness to fluctuate with changes in operating conditions, affecting the user's visual experience.

[0004] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a new type of battery monitoring IC control lamp display circuit with greater industrial application value. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a battery monitoring IC control lamp display circuit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A battery monitoring IC control light display circuit includes a battery pack and a BMS mainboard. The BMS mainboard includes an IC module, a light display module, and buttons. The output terminal of the battery pack is connected to the power supply terminal of the IC module, and the output terminal of the battery pack is also connected to the power supply terminal of the light display module. The acquisition terminal of the IC module is connected to the input terminal of the battery pack, the control terminal of the IC module is connected to the input terminal of the light display module, and the light display module is connected to the buttons.

[0007] Preferably, in the battery monitoring IC control light display circuit, the battery pack is a battery pack composed of 5 lithium batteries connected in series.

[0008] Preferably, in the battery monitoring IC control light display circuit, the IC module uses a chip U1 with the model number CW2052BLBP.

[0009] Preferably, in the battery monitoring IC control light display circuit, all the light display modules use LED lights.

[0010] Preferably, in the battery monitoring IC control lamp display circuit, the first pin of chip U1 is connected to the battery pack through resistor R5, the third pin of chip U1 is connected to the battery pack, a capacitor C2 is connected between the first pin and the third pin of chip U1, the second pin of chip U1 is connected to one end of switch S1 through capacitor C1 and resistor R4 connected in series, the other end of switch S1 is connected to the battery pack (1), the second pin of chip U1 is grounded through resistor R6, a resistor R7 is connected in parallel with capacitor C1 and resistor R6, the eighth pin of chip U1 is connected to the cathode of LED1, the anode of LED1 is connected to the battery pack through resistor R1, the sixth pin of chip U1 is connected to the cathode of LED2, the anode of LED2 is connected to the battery pack through resistor R2, the fourth pin of chip U1 is connected to the cathode of LED3, and the anode of LED3 is connected to the battery pack through resistor R3.

[0011] By means of the above solution, this utility model has at least the following advantages: This invention utilizes the CW2052BLBP dedicated battery monitoring IC to control the LED display. The IC integrates a high-precision voltage detection module and a stable LED driving circuit, which can output a constant driving signal according to preset logic. It is unaffected by dynamic changes in battery voltage, thus avoiding brightness fluctuations at the source and ensuring uniform and stable LED display brightness under different power conditions, thereby improving the user's visual experience.

[0012] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the principle of this utility model; Figure 2 This is the actual circuit diagram of this utility model. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0017] Example like Figure 1 As shown, a battery monitoring IC control light display circuit includes a battery pack 1 and a BMS motherboard 2. The BMS motherboard 2 includes an IC module 21, a light display module 22, and a button 23. The output terminal of the battery pack 1 is connected to the power supply terminal of the IC module 21, and the output terminal of the battery pack 1 is connected to the power supply terminal of the light display module 22. The acquisition terminal of the IC module 21 is connected to the input terminal of the battery pack 1, and the control terminal of the IC module 21 is connected to the input terminal of the light display module 22. The light display module 22 is connected to the button 23.

[0018] In this embodiment, the battery pack 1 is a battery pack consisting of 5 lithium batteries connected in series.

[0019] In this embodiment, the IC module 21 uses a chip U1 with the model number CW2052BLBP.

[0020] In this embodiment, all the light display modules 22 use LED lights.

[0021] like Figure 2As shown in the actual application circuit of this utility model, the first pin of chip U1 is connected to battery pack 1 through resistor R5, the third pin of chip U1 is connected to battery pack 1, a capacitor C2 is connected between the first pin and the third pin of chip U1, the second pin of chip U1 is connected to one end of switch S1 through capacitor C1 and resistor R4 connected in series, the other end of switch S1 is connected to battery pack 1, the second pin of chip U1 is grounded through resistor R6, a resistor R7 is connected in parallel with capacitor C1 and resistor R6, the eighth pin of chip U1 is connected to the cathode of LED1, the anode of LED1 is connected to battery pack 1 through resistor R1, the sixth pin of chip U1 is connected to the cathode of LED2, the anode of LED2 is connected to battery pack 1 through resistor R2, the fourth pin of chip U1 is connected to the cathode of LED3, and the anode of LED3 is connected to battery pack 1 through resistor R3.

[0022] In the above embodiments, such as Figure 2 The system displays corresponding LEDs based on different voltages to indicate the battery pack's charge level.

[0023] This invention uses the Saiwei CW2052BLBP battery monitoring IC as the core control component for power display. The IC is powered directly by the battery pack, ensuring synchronization and accuracy with battery voltage monitoring. Its working principle is as follows: (1) CW2052BLBP collects the output voltage of the battery pack in real time; (2) According to the preset voltage segmentation threshold (such as full voltage, undervoltage, etc.), a control signal is sent to the LED light display module; wherein the voltage segmentation threshold is the prior art known to those skilled in the art, and the segmentation is based on the actual working conditions performed by those skilled in the art. (3) By controlling different quantities (such as Figure 2 The system can visualize the battery level by turning different colored LEDs on and off (as shown in the image) or by using different LEDs to indicate the battery level (e.g., all four LEDs are lit when the battery is fully charged, and one LED flashes when the battery is low), allowing users to intuitively understand the remaining battery level.

[0024] To avoid unnecessary power consumption caused by continuous operation of the IC module, this utility model adds a button trigger function. Figure 2 Optimize energy consumption management: (1) Under normal conditions, the battery monitoring IC module is in a low-power standby state and the LED display does not work; (2) When the user presses the button, the IC module is triggered to switch from standby mode to working mode; (3). After the IC module starts up, it immediately collects the current battery pack voltage and controls the LED display's on / off logic based on the voltage data to complete the power display; (4) After the display is completed (a preset delay, such as 5 seconds, can be set), the IC module will automatically return to standby mode, reducing system power consumption and extending battery life.

[0025] The CW2052BLBP dedicated battery monitoring IC of this utility model realizes the control of the LED display. The IC integrates a high-precision voltage detection module and a stable LED driving circuit. It can output a constant driving signal according to the preset logic, which is not affected by the dynamic changes of battery voltage. It avoids the problem of brightness fluctuation from the root and ensures that the LED display brightness is uniform and stable under different power states, thus improving the user's visual experience.

[0026] Its IC does not require MCU resources and is suitable for various scenarios. Traditional lighting display solutions, if they need to achieve precise control (such as segmented power display and fault status indication), rely on the BMS's MCU (microcontroller unit) for voltage sampling, logic judgment, and LED driving control. This will occupy the MCU's I / O pins, AD sampling channels, and computing resources. Especially in hardware-based BMS solutions (without MCU design, relying only on discrete components to achieve basic protection) or software solutions with limited MCU pins / resources (such as multi-cell monitoring, charge and discharge protection, and communication functions that already occupy a lot of resources), traditional solutions have obvious limitations in adaptability.

[0027] The CW2052BLBP of this utility model can independently handle the entire process of "battery voltage detection - power logic judgment - LED drive control" without the need for MCU intervention. (1) For hardware-based BMS solutions: no additional MCU is needed to achieve precise lamp display function, simplifying circuit design and reducing costs; (2) Software solutions for MCU resource shortages: free up MCU I / O pins and computing resources, allowing MCU to focus on core functions such as battery protection and charge / discharge management, thereby improving the overall system operating efficiency and stability.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A battery monitoring IC control lamp display circuit, comprising a battery pack (1) and a BMS mainboard (2), characterized in that: The BMS motherboard (2) includes an IC module (21), a light display module (22), and a button (23). The output terminal of the battery pack (1) is connected to the power supply terminal of the IC module (21), the output terminal of the battery pack (1) is connected to the power supply terminal of the light display module (22), the acquisition terminal of the IC module (21) is connected to the input terminal of the battery pack (1), the control terminal of the IC module (21) is connected to the input terminal of the light display module (22), and the light display module (22) is connected to the button (23).

2. The battery monitor IC control lamp indication circuit according to claim 1, characterized by: The battery pack (1) is a battery pack consisting of 5 lithium batteries connected in series.

3. The battery monitor IC control lamp indication circuit according to claim 1, characterized by: The IC module (21) uses chip U1 with model number CW2052BLBP.

4. The battery monitor IC control lamp indication circuit according to claim 1, characterized by: The light display modules (22) all use LED lights.

5. The battery monitor IC control lamp indication circuit according to any one of claims 1 to 4, characterized by: The first pin of chip U1 is connected to the battery pack (1) through resistor R5. The third pin of chip U1 is connected to the battery pack (1). A capacitor C2 is connected between the first pin and the third pin of chip U1. The second pin of chip U1 is connected to one end of switch S1 through capacitor C1 and resistor R4 connected in series. The other end of switch S1 is connected to the battery pack (1). The second pin of chip U1 is grounded through resistor R6. A resistor R7 is connected in parallel with capacitor C1 and resistor R6. The eighth pin of chip U1 is connected to the cathode of LED1. The anode of LED1 is connected to the battery pack (1) through resistor R1. The sixth pin of chip U1 is connected to the cathode of LED2. The anode of LED2 is connected to the battery pack (1) through resistor R2. The fourth pin of chip U1 is connected to the cathode of LED3. The anode of LED3 is connected to the battery pack (1) through resistor R3.

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