A battery segmented charging management device

Abstract

The utility model aims at providing a battery sectional type charging management device. The utility model discloses MCU module, battery sectional type charging management device still includes the DC-DC step up and step down circuit, drive circuit, current detection circuit, voltage detection circuit, battery voltage output control circuit that connects gradually, the DC-DC step up and step down circuit is connected with input power, the PA05 pin of DC-DC step up and step down circuit is connected with the corresponding pin of MCU module, the PA06 pin of drive circuit is connected with the corresponding pin of MCU module, the ADC1 pin of current detection circuit is connected with the corresponding pin of MCU module, the ADC2 pin of voltage detection circuit is connected with the corresponding pin of MCU module, the Pow ON / OFF pin of battery voltage output control circuit is connected with the corresponding pin of MCU module, and battery voltage output control circuit is output power. The utility model is applied to the technical field of battery charging.

Description

Technical Field

[0001] This utility model applies to the technical field of battery charging, and particularly relates to a battery segmented charging management device. Background Technology

[0002] Segmented charging management refers to the process where, after the battery is connected to the charger, it first undergoes trickle charging, then constant current charging, and finally constant voltage charging until it is fully charged.

[0003] A traditional segmented charging management chip is limited to one type of rechargeable battery, such as lithium battery, lead-acid battery, or nickel-metal hydride battery, and cannot be universally used. Moreover, it is limited by the battery's voltage and power level, and once the charging voltage and current are fixed, they cannot be adjusted.

[0004] Traditional segmented charging management chips typically have the following functions: 1. It has over-temperature and current limiting protection, battery detection function, reverse backflow protection, and output short circuit protection; 2. Constant current charging current is configurable; 3. It integrates a high-voltage MOSFET driver and can monitor the input voltage in real time, only activating the charging circuit at the back end when the operating conditions are met. 4. Some management chips support DC-DC buck or DC-DC boost functions to convert the voltage required for battery charging; 5. It has charging status indication functions for charging in progress and charging completed.

[0005] However, certain chips can only manage single or multiple lithium-ion batteries, typically single or three cells, limiting the number of rechargeable batteries. Some chips also have requirements regarding battery type, primarily due to limitations in the output voltage regulation value. For example, a single lithium battery typically has a 5V input and a 4.2V output, making this chip solution unsuitable for lead-acid batteries and thus not universally applicable. The current value for chip charging management is limited, usually ranging from a few hundred milliamps to a few amps, resulting in limited achievable charging power. Once fixed, this power is not adjustable, offering very low flexibility. Furthermore, it lacks battery discharge management functionality, requiring additional battery discharge management circuitry to prevent over-discharge damage, increasing costs.

[0006] Therefore, it is necessary to provide a battery segmented charging management device with low circuit cost and high integration, which can realize three-stage charging management of ordinary lithium batteries and four-stage charging management of lead-acid batteries, greatly increasing the flexibility of the circuit and enabling rapid function switching by changing parameter configuration; it can manage both charging and discharging of the battery. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a segmented battery charging management device with low circuit cost and high integration. It can realize three-segment charging management of ordinary lithium batteries and four-segment charging management of lead-acid batteries, which greatly increases the flexibility of the circuit. By changing the parameter configuration, the function can be quickly switched; it can manage both charging and discharging of the battery.

[0008] The technical solution adopted by this utility model is as follows: This utility model includes an MCU module. The battery segmented charging management device further includes a DC-DC buck-boost circuit, a drive circuit, a current detection circuit, a voltage detection circuit, and a battery voltage output control circuit connected in sequence. The DC-DC buck-boost circuit is connected to the input power supply. The PA05 pin of the DC-DC buck-boost circuit is connected to the corresponding pin of the MCU module. The PA06 pin of the drive circuit is connected to the corresponding pin of the MCU module. The ADC1 pin of the current detection circuit is connected to the corresponding pin of the MCU module. The ADC2 pin of the voltage detection circuit is connected to the corresponding pin of the MCU module. The Pow ON / OFF pin of the battery voltage output control circuit is connected to the corresponding pin of the MCU module. The battery voltage output control circuit serves as the output power supply.

[0009] As described above, this application uses an MCU module to control the coordinated operation of each functional module, enabling both three-stage charging management for ordinary lithium batteries and four-stage charging management for lead-acid batteries, greatly increasing circuit flexibility. The DC-DC circuit module can be adjusted to flexibly meet the charging voltage requirements of different battery cell counts. By changing parameter configurations and upgrading the MCU online, rapid function switching is achieved. The MCU module controls the coordinated operation of each functional module, enabling both charging and discharging management of the battery, significantly improving integration while eliminating the need for a discharging management chip and reducing circuit costs.

[0010] In a preferred embodiment, the battery segmented charging management device further includes an LED control circuit, which includes a first LED and a second LED. The LED1 pin of the first LED and the LED2 pin of the second LED are both connected to the corresponding pins of the MCU module.

[0011] In a preferred embodiment, the battery segmented charging management device further includes a battery temperature detection circuit, which includes a battery terminal, and the ADC3 pin of the battery terminal is connected to the corresponding pin of the MCU module.

[0012] In a preferred embodiment, the DC-DC buck-boost circuit includes a boost-constant voltage control driver chip, wherein the PA05 pin of the boost-constant voltage control driver chip is connected to the corresponding pin of the MCU module, and the VOUT pin of the boost-constant voltage control driver chip is connected to the corresponding pin of the drive circuit.

[0013] In a preferred embodiment, the driving circuit includes a first field-effect transistor, the current detection circuit includes a first resistor and a second resistor, and the voltage detection circuit includes a third resistor and a fourth resistor. The drain terminal of the first field-effect transistor is divided into two paths: one path is grounded through the first resistor and the second resistor, and the other path is grounded through the third resistor and the fourth resistor. The node of the first resistor and the second resistor is connected to the ADC1 pin of the MCU module, and the node of the third resistor and the fourth resistor is connected to the ADC2 pin of the MCU module.

[0014] In a preferred embodiment, the battery voltage output control circuit includes a second field-effect transistor, the gate (G) and source (S) terminals of which are connected to the Pow ON / OFF pins of the MCU module, and the drain (D) terminal of the second field-effect transistor is the VOUT terminal. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the present invention; Figure 2 This is the circuit schematic of the MCU module; Figure 3 This is the circuit schematic of the DC-DC step-up / step-down circuit. Figure 4 This is a circuit diagram of the driving circuit, the current detection circuit, and the voltage detection circuit; Figure 5 This is the circuit diagram of the battery voltage output control circuit. Figure 6 This is the circuit diagram of the LED control circuit. Figure 7 This is the circuit diagram of the battery temperature detection circuit. Detailed Implementation

[0016] like Figures 1 to 5As shown, in this embodiment, the present invention includes an MCU module 1. The battery segmented charging management device further includes a DC-DC buck-boost circuit 2, a drive circuit 3, a current detection circuit 4, a voltage detection circuit 5, and a battery voltage output control circuit 6 connected in sequence. The DC-DC buck-boost circuit 2 is connected to the input power supply. The PA05 pin of the DC-DC buck-boost circuit 2 is connected to the corresponding pin of the MCU module 1. The PA06 pin of the drive circuit 3 is connected to the corresponding pin of the MCU module 1. The ADC1 pin of the current detection circuit 4 is connected to the corresponding pin of the MCU module 1. The ADC2 pin of the voltage detection circuit 5 is connected to the corresponding pin of the MCU module 1. The Pow ON / OFF pin of the battery voltage output control circuit 6 is connected to the corresponding pin of the MCU module 1. The battery voltage output control circuit 6 serves as the output power supply. The model of the MCU module 1 is CW32L010F8P6.

[0017] This application obtains the desired charging voltage value through the DC-DC buck-boost circuit 2, selects a buck-boost chip with the corresponding power according to the required charging power, and controls the switch via the MCU module 1. The drive circuit 3 is a MOSFET drive circuit, and the MCU module 1 controls the switching frequency of the MOSFET drive circuit via PWM, thereby controlling the magnitude of the charging current. The PWM frequency is adjusted based on the charging current value obtained from the current detection circuit 4 to ensure stable charging current at each stage. The voltage detection circuit 5 detects the battery voltage in real time to determine whether the battery is fully charged. The battery voltage output control circuit 6, controlled by the MCU module 1 based on the battery voltage monitored in real time by the voltage detection circuit, controls the switch to prevent over-discharge of the battery.

[0018] like Figure 6 As shown, in this embodiment, the battery segmented charging management device further includes an LED control circuit 7. The LED control circuit 7 includes a first LED and a second LED. The LED1 pin of the first LED and the LED2 pin of the second LED are both connected to the corresponding pins of the MCU module 1. The LED control circuit 7 indicates the charging status by controlling the on / off state of the corresponding LED that is charging or has completed charging, as controlled by the MCU module 1.

[0019] like Figure 7 As shown, in this embodiment, the battery segmented charging management device further includes a battery temperature detection circuit 8, which includes a battery terminal P1A. The ADC3 pin of the battery terminal P1A is connected to the corresponding pin of the MCU module 1.

[0020] The battery temperature detection circuit 8 monitors the battery temperature in real time. If the battery temperature exceeds the normal range, the charging process will be paused until the battery temperature returns to the normal range.

[0021] like Figure 3 As shown, in this embodiment, the DC-DC boost / buck circuit 2 includes a boost / constant voltage control driver chip U1. The PA05 pin of the boost / constant voltage control driver chip U1 is connected to the corresponding pin of the MCU module 1, and the VOUT pin of the boost / constant voltage control driver chip U1 is connected to the corresponding pin of the drive circuit 3. The model of the boost / constant voltage control driver chip U1 is XL6019.

[0022] like Figure 4 As shown, in this embodiment, the driving circuit 3 includes a first field-effect transistor Q2, the current detection circuit 4 includes a first resistor R8 and a second resistor R10, and the voltage detection circuit 5 includes a third resistor R9 and a fourth resistor R11. The drain terminal of the first field-effect transistor Q2 is divided into two paths: one path is grounded through the first resistor R8 and the second resistor R10, and the other path is grounded through the third resistor R9 and the fourth resistor R11. The node of the first resistor R8 and the second resistor R10 is connected to the ADC1 pin of the MCU module 1, and the node of the third resistor R9 and the fourth resistor R11 is connected to the ADC2 pin of the MCU module 1. The first field-effect transistor Q2 is an AO4407A.

[0023] like Figure 4 As shown, in this embodiment, the battery voltage output control circuit 6 includes a second field-effect transistor Q3. The gate (G) and source (S) terminals of the second field-effect transistor Q3 are both connected to the Pow ON / OFF pin of the MCU module 1, and the drain (D) terminal of the second field-effect transistor Q3 is the VOUT terminal. The second field-effect transistor Q3 is an AO4407A.

Claims

1. A battery segmented charging management device, comprising an MCU module (1), characterized in that: The battery segmented charging management device further includes a DC-DC buck-boost circuit (2), a drive circuit (3), a current detection circuit (4), a voltage detection circuit (5), and a battery voltage output control circuit (6) connected in sequence. The DC-DC buck-boost circuit (2) is connected to the input power supply. The PA05 pin of the DC-DC buck-boost circuit (2) is connected to the corresponding pin of the MCU module (1). The PA06 pin of the drive circuit (3) is connected to the corresponding pin of the MCU module (1). The ADC1 pin of the current detection circuit (4) is connected to the corresponding pin of the MCU module (1). The ADC2 pin of the voltage detection circuit (5) is connected to the corresponding pin of the MCU module (1). The Pow ON / OFF pin of the battery voltage output control circuit (6) is connected to the corresponding pin of the MCU module (1). The battery voltage output control circuit (6) serves as the output power supply.

2. The battery segmented charge management device of claim 1, wherein: The battery segmented charging management device also includes an LED control circuit (7), which includes a first LED and a second LED. The LED1 pin of the first LED and the LED2 pin of the second LED are connected to the corresponding pins of the MCU module (1).

3. The battery segmented charge management device of claim 1, wherein: The battery segmented charging management device also includes a battery temperature detection circuit (8), which includes a battery terminal (P1A). The ADC3 pin of the battery terminal (P1A) is connected to the corresponding pin of the MCU module (1).

4. The battery segmented charge management device of claim 1, wherein: The DC-DC buck-boost circuit (2) includes a boost constant voltage control driver chip (U1). The PA05 pin of the boost constant voltage control driver chip (U1) is connected to the pin corresponding to the MCU module (1), and the VOUT pin of the boost constant voltage control driver chip (U1) is connected to the pin corresponding to the drive circuit (3).

5. The battery segmented charge management device of claim 1, wherein: The driving circuit (3) includes a first field-effect transistor (Q2), the current detection circuit (4) includes a first resistor (R8) and a second resistor (R10), and the voltage detection circuit (5) includes a third resistor (R9) and a fourth resistor (R11). The D terminal of the first field-effect transistor (Q2) is divided into two paths: one path is grounded through the first resistor (R8) and the second resistor (R10), and the other path is grounded through the third resistor (R9) and the fourth resistor (R11). The node of the first resistor (R8) and the second resistor (R10) is connected to the ADC1 pin of the MCU module (1), and the node of the third resistor (R9) and the fourth resistor (R11) is connected to the ADC2 pin of the MCU module (1).

6. The battery segmented charge management device of claim 1, wherein: The battery voltage output control circuit (6) includes a second field-effect transistor (Q3). The G and S terminals of the second field-effect transistor (Q3) are connected to the Pow ON / OFF pin of the MCU module (1). The D terminal of the second field-effect transistor (Q3) is the VOUT terminal.

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