Battery polarity switching module with logic mutual exclusion

Abstract

The utility model aims to provide a battery polarity switching module with logic mutual exclusion. The battery testing device comprises a power supply module, a switching module, an operational amplifier and an MCU module, the power supply module is connected to a battery to be tested through the switching module, the battery to be tested is connected to the MCU module through the operational amplifier, the MCU module is connected with the switching module and an external testing machine, and the external testing machine is connected with the switching module. The switching module comprises a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube and a sixth MOS tube, one end of the battery to be tested is divided into two paths, one path is connected to the first MOS tube and the second MOS tube, the other path is connected to the third MOS tube, the other end of the battery to be tested is divided into two paths, one path is connected to the third MOS tube and the fourth MOS tube, and the other path is connected to the sixth MOS tube. The utility model is applied to the technical field of power battery charging and discharging.

Description

Technical Field

[0001] The utility model is applied to the technical field of power battery charging and discharging, and particularly relates to a battery polarity switching module with logical mutual exclusion. Background Art

[0002] With the rapid advancement of power electronics technology, electricity supply has become an indispensable part of daily life. Power batteries are high-power, high-density batteries used in daily life. With the growing demand for energy storage devices and new energy vehicles in recent years, the demand for power batteries has also increased. Traditionally, the production process for power batteries required manual confirmation of battery polarity. If the polarity was incorrect, the battery would need to be adjusted to ensure that the output polarity of the charging and discharging equipment matched the polarity of the power battery, ensuring safe battery charging and discharging. However, manual polarity verification is inefficient and prone to errors. Using relays to switch polarity can result in current that is not suitable for the power battery. Furthermore, relays are expensive and bulky, making them difficult to design and develop. Therefore, there is a need for a low-cost, efficient, flexible, and adaptable battery polarity switching module with logic mutual exclusion that uses MOSFETs instead of relays for polarity switching. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a battery polarity switching module with logic mutual exclusion which is low in cost, high in efficiency, flexible in application, and strong in applicability and which uses MOS tubes instead of relays to switch polarity.

[0004] The technical solution adopted by the utility model is as follows: the utility model includes a power supply module, a switching module, an operational amplifier, and an MCU module. The power supply module is connected to a battery to be tested via the switching module, and the battery to be tested is connected to the MCU module via the operational amplifier. The MCU module is connected to the switching module and an external tester. The switching module includes a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a fifth MOS transistor, and a sixth MOS transistor. One end of the battery to be tested is divided into two paths, one path is connected to the first MOS transistor and the second MOS transistor, and the other path is connected to the third MOS transistor. The other end of the battery to be tested is divided into two paths, one path is connected to the third MOS transistor and the fourth MOS transistor, and the other path is connected to the sixth MOS transistor.

[0005] As can be seen from the above scheme, this application connects the output end of the charging and discharging device to the battery to be tested, detects the positive and negative voltage to determine the positive and negative polarity of the battery to be tested, and then switches the corresponding polarity to ensure that the battery to be tested can be charged and discharged normally.

[0006] This application has the following advantages:

[0007] A. Flexible application: This application is suitable for various voltage and current environments. It can be adapted by changing the model and quantity of MOS tubes according to the output voltage and current.

[0008] B. Strong applicability: Compared with multi-state relays, the MOS tubes on the electronics market are more diverse in types. When the applicable MOS is out of stock, the design does not need to be modified;

[0009] C. Low cost: Compared with multi-state relays, this application can select appropriate MOS tubes according to different voltages and currents, reducing design costs.

[0010] D. High efficiency: Greatly reduces the efficiency of battery production and reduces labor costs.

[0011] In a preferred embodiment, one end of the battery to be tested is divided into two paths, one path is connected to the drain of the first MOS tube, the source of the first MOS tube is connected to the source of the second MOS tube, and the drain of the second MOS tube is connected to the power supply module, and the other path is connected to the drain of the third MOS tube, and the source of the third MOS tube is connected to the power supply module; the other end of the battery to be tested is divided into two paths, one path is connected to the drain of the fourth MOS tube, the source of the fourth MOS tube is connected to the source of the fifth MOS tube, and the drain of the fifth MOS tube is connected to the power supply module, and the other path is connected to the drain of the sixth MOS tube, and the source of the sixth MOS tube is connected to the power supply module. The IO port of the MCU module is connected to the gate of the first MOS tube, the gate of the second MOS tube, the gate of the third MOS tube, the gate of the fourth MOS tube, the gate of the fifth MOS tube, and the gate of the sixth MOS tube through the control drive circuit.

[0012] A preferred solution is that the power supply module includes an AC-DC module and a DC-DC module, the AC-DC module is connected to the input voltage, and the AC-DC module is connected to the switching module via the DC-DC module.

[0013] A preferred solution is that the battery to be tested is connected to the input end of the operational amplifier and the switching module, the output end of the operational amplifier is connected to the analog-to-digital converter of the MCU module, and the REF end of the operational amplifier is connected to a 1.65V voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a block diagram of the polarity switching system of the present utility model;

[0016] Figure 3This is a control block diagram of the utility model when the battery polarity is positive;

[0017] Figure 4 This is a control block diagram of the utility model when the battery polarity is reversed;

[0018] Figure 5 This is the polarity switching topology of the utility model;

[0019] Figure 6 This is a control diagram of the battery of the present invention when the left side is positive and the right side is negative;

[0020] Figure 7 This is a control diagram of the battery of the present invention when the right side is positive and the left side is negative;

[0021] Figure 8 This is a mutually exclusive logic control circuit diagram of the utility model. DETAILED DESCRIPTION

[0022] like Figures 1 to 7 As shown, in this embodiment, the utility model includes a power supply module 1, a switching module 2, an operational amplifier 3, and an MCU module 4. The power supply module 1 is connected to a battery under test 5 via the switching module 2, and the battery under test 5 is connected to the MCU module 4 via the operational amplifier 3. The MCU module 4 is connected to the switching module 2 and an external tester. The switching module 2 includes a first MOS transistor Q2, a second MOS transistor Q1, a third MOS transistor Q5, a fourth MOS transistor Q4, a fifth MOS transistor Q3, and a sixth MOS transistor Q6. One end of the battery under test 5 is divided into two paths, one path is connected to the first MOS transistor Q2 and the second MOS transistor Q1, and the other path is connected to the third MOS transistor Q5. The other end of the battery under test 5 is divided into two paths, one path is connected to the third MOS transistor Q5 and the fourth MOS transistor Q4, and the other path is connected to the sixth MOS transistor Q6. The operational amplifier 3 is connected to a 1.65V voltage. This application uses MOS tubes to perform polarity switching. The current size of the polarity switching can be connected to MOS according to different currents, and this circuit can be made into a module to reduce design and maintenance costs, and has a logical mutual exclusion function.

[0023] Figure 2 It is a polarity switching device. When the FORCE line of the battery 5 to be tested is connected to the connector of the device, the voltage of the battery 5 to be tested is detected by the operational amplifier 3. When the voltage detected by the ADC of the MCU module 4 is greater than 1.65V, it means that the polarity of the battery is red line for positive and black line for negative. Therefore, the IO port of the MCU module 4 controls the switching module 2 to switch to Figure 3 The circuit status;

[0024] When the voltage detected by the ADC of the MCU module 4 is less than 1.65V, it indicates that the polarity of the battery 5 to be tested is that the red line is the negative pole and the black line is the positive pole. Therefore, the IO port of the MCU module 4 controls the switching module 2 to switch to Figure 4 circuit status.

[0025] like Figures 1 to 7 As shown, in this embodiment, one end of the battery under test 5 is divided into two paths, one path is connected to the drain of the first MOS transistor Q2, the source of the first MOS transistor Q2 is connected to the source of the second MOS transistor Q1, and the drain of the second MOS transistor Q1 is connected to the power supply module 1, and the other path is connected to the drain of the third MOS transistor Q5, and the source of the third MOS transistor Q5 is connected to the power supply module 1; the other end of the battery under test 5 is divided into two paths, one path is connected to the drain of the fourth MOS transistor Q4, the source of the fourth MOS transistor Q4 is connected to the source of the fifth MOS transistor Q3, and the drain of the fifth MOS transistor Q3 is connected to the power supply module 1, and the other path is connected to the drain of the sixth MOS transistor Q6, and the source of the sixth MOS transistor Q6 is connected to the power supply module 1. The IO port of the MCU module 4 is connected to the gate of the first MOS transistor Q2, the gate of the second MOS transistor Q1, the third MOS transistor Q5, the gate of the fourth MOS transistor Q4, the gate of the fifth MOS transistor Q3, and the gate of the sixth MOS transistor Q6 through the control drive circuit.

[0026] like Figure 5 As shown, when the first MOS transistor Q2, the second MOS transistor Q1, the third MOS transistor Q5, the fourth MOS transistor Q4, the fifth MOS transistor Q3, and the sixth MOS transistor Q6 are all turned off, the voltage output by the power supply module 1 is disconnected from the loop of the battery under test 5, and the battery under test 5 is not charged at this time;

[0027] like Figure 6 As shown, when the direction of the battery 5 to be tested is positive on the left and negative on the right, the first MOS transistor Q2, the second MOS transistor Q1, and the sixth MOS transistor Q6 are turned on, and the fourth MOS transistor Q4, the third MOS transistor Q5, and the sixth MOS transistor Q6 are turned off. The positive voltage output by the power supply module 1 is the positive electrode of the battery 5 to be tested, and the zero level output is the negative electrode of the battery 5 to be tested. At this time, the battery 5 to be tested can be charged and discharged.

[0028] like Figure 7As shown, when the direction of the battery 5 to be tested is positive on the right and negative on the left, the first MOS transistor Q2, the second MOS transistor Q1, and the sixth MOS transistor Q6 are turned off, and the fourth MOS transistor Q4, the third MOS transistor Q5, and the sixth MOS transistor Q6 are turned on. The positive voltage output by the power supply module 1 is the positive electrode of the battery, and the zero level output is the negative electrode of the battery 5 to be tested. At this time, the battery 5 to be tested can be charged and discharged.

[0029] like Figures 5 to 7 As shown, in this embodiment, the power supply module 1 includes an AC-DC module and a DC-DC module. The AC-DC module is connected to the input voltage, and the AC-DC module is connected to the switching module 2 via the DC-DC module.

[0030] like Figures 1 to 7 As shown, in this embodiment, the input end of the operational amplifier 3 is connected to the battery to be tested 5 and the switching module 2, the output end of the operational amplifier 3 is connected to the analog-to-digital converter of the MCU module 4, and the REF end of the operational amplifier 3 is connected to a 1.65V voltage.

[0031] like Figure 8 As shown, A and B are the control IO of the MCU module 4, and C and D are the MOS tube drive signals. This signal can prevent the MCU module 4 from losing control. Figure 5 The first MOS transistor Q2, the second MOS transistor Q1, the third MOS transistor Q5, the fourth MOS transistor Q4, the fifth MOS transistor Q3, and the sixth MOS transistor Q6 are all turned on, causing the power output to be short-circuited and damaging the device.

[0032] Table 1 is the truth table of the mutually exclusive logic control current of this utility model .

Claims

1. A battery polarity switching module with logical mutual exclusion, characterized by: It comprises a power supply module (1), a switching module (2), an operational amplifier (3), and an MCU module (4). The power supply module (1) is connected to a battery to be tested (5) via the switching module (2). The battery to be tested (5) is connected to the MCU module (4) via the operational amplifier (3). The MCU module (4) is connected to the switching module (2) and an external tester. The switching module (2) comprises a first MOS tube (Q2), a second MOS tube (Q1), a third MOS tube (Q5), a fourth MOS tube (Q4), a fifth MOS tube (Q3), and a sixth MOS tube (Q6). One end of the battery to be tested (5) is divided into two paths, one path is connected to the first MOS tube (Q2) and the second MOS tube (Q1), and the other path is connected to the third MOS tube (Q5). The other end of the battery to be tested (5) is divided into two paths, one path is connected to the third MOS tube (Q5) and the fourth MOS tube (Q4), and the other path is connected to the sixth MOS tube (Q6).

2. The battery polarity switching module with logical mutual exclusion according to claim 1, characterized in that: One end of the battery to be tested (5) is divided into two paths, one path is connected to the drain of the first MOS tube (Q2), the source of the first MOS tube (Q2) is connected to the source of the second MOS tube (Q1), the drain of the second MOS tube (Q1) is connected to the power supply module (1), and the other path is connected to the drain of the third MOS tube (Q5), the source of the third MOS tube (Q5) is connected to the power supply module (1); the other end of the battery to be tested (5) is divided into two paths, one path is connected to the drain of the fourth MOS tube (Q4), the source of the fourth MOS tube (Q4) is connected to the drain of the fifth MOS tube (Q1). The source of the S tube (Q3) is connected, the drain of the fifth MOS tube (Q3) is connected to the power supply module (1), and the other is connected to the drain of the sixth MOS tube (Q6), the source of the sixth MOS tube (Q6) is connected to the power supply module (1), and the IO port of the MCU module (4) is connected to the gate of the first MOS tube (Q2), the gate of the second MOS tube (Q1), the third MOS tube (Q5), the gate of the fourth MOS tube (Q4), the gate of the fifth MOS tube (Q3), and the gate of the sixth MOS tube (Q6) through a control drive circuit.

3. The battery polarity switching module with logical mutual exclusion according to claim 1, characterized in that: The power supply module (1) comprises an AC-DC module and a DC-DC module, the AC-DC module is connected to an input voltage, and the AC-DC module is connected to the switching module (2) via the DC-DC module.

4. The battery polarity switching module with logical mutual exclusion according to claim 1, characterized in that: The battery to be tested (5) is connected to the input end of the operational amplifier (3) and the switching module (2), the output end of the operational amplifier (3) is connected to the analog-to-digital converter of the MCU module (4), and the REF end of the operational amplifier (3) is connected to a 1.65V voltage.

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