Battery control circuit

Abstract

According to the battery control circuit, when the power-on switch positive pin wire and the power-on switch negative pin wire are arranged in the conductive liquid, the switching circuit is switched on, the battery pack supplies power to the load circuit through the switching circuit, when the power-on switch positive pin wire and the power-on switch negative pin wire are not arranged in the conductive liquid, the switching circuit is switched off, and the battery pack supplies power to the load circuit through the switching circuit. Compared with a traditional mode that a traditional button needs to be pressed manually, the control mode is simpler and more reliable, and the device is more corrosion-resistant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery control circuit. BACKGROUND

[0002] For the output on-off control of the battery pack, the existing seawater switch method is to manually open and turn off the traditional switch mode. This method has the following defects:

[0003] 1) The traditional key, button, boat-shaped switch has the problem of not being corrosion-resistant;

[0004] 2) The traditional key, button, boat-shaped switch has the problem of easy contact adhesion when working under large current;

[0005] 3) The traditional key, button, boat-shaped switch has the problem of large physical consumption of workers and waste of manpower. SUMMARY

[0006] The purpose of the embodiment of the present application is to provide a battery control circuit to solve the above technical problems.

[0007] A battery control circuit, comprising:

[0008] A discharge loop connected between the positive electrode of the battery pack and the negative electrode of the battery pack, the discharge loop comprising a switch circuit and a load circuit connected in sequence, the switch circuit comprising a power-on switch positive pin line and a power-on switch negative pin line;

[0009] When the power-on switch positive pin line and the power-on switch negative pin line are placed in a conductive liquid, the switch circuit is turned on, and the battery pack supplies power to the load circuit through the switch circuit;

[0010] When the power-on switch positive pin line and the power-on switch negative pin line are not placed in the conductive liquid, the switch circuit is turned off.

[0011] In one embodiment, the switch circuit comprises a first MOS tube and a second MOS tube, the power-on switch positive pin line is led out through the drain of the first MOS tube, and the power-on switch negative pin line is led out through the gate of the first MOS tube;

[0012] The drain of the first MOS tube is connected to the positive electrode of the battery pack, and the source of the first MOS tube is connected to the negative electrode of the battery pack and the gate of the second MOS tube;

[0013] The source of the second MOS tube is connected to the negative electrode of the battery pack, and the drain of the second MOS tube is connected to the load circuit.

[0014] In one of the embodiments, the battery control circuit further comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit; the first voltage stabilizing circuit is connected between the source of the first MOS tube and the gate of the first MOS tube, and the second voltage stabilizing circuit is connected between the source of the second MOS tube and the gate of the second MOS tube.

[0015] In one of the embodiments, the first MOS tube and the second MOS tube are both NMOS tubes.

[0016] In one of the embodiments, the first voltage stabilizing circuit comprises a first voltage stabilizing tube and a first resistor connected in parallel with the first voltage stabilizing tube, and the second voltage stabilizing circuit comprises a second voltage stabilizing tube and a second resistor connected in parallel with the second voltage stabilizing tube.

[0017] In one of the embodiments, the battery control circuit further comprises a current limiting circuit connected between the drain of the first MOS tube and the positive pin line of the power-on switch.

[0018] In one of the embodiments, the current limiting circuit comprises a third resistor and a fourth resistor connected in series, and one connection point between the third resistor and the fourth resistor is connected with the positive pole of the battery pack.

[0019] In one of the embodiments, the battery control circuit further comprises a filter circuit connected between the positive pole of the battery pack and the negative pole of the battery pack.

[0020] In one of the embodiments, the filter circuit comprises a filter capacitor.

[0021] In one of the embodiments, the conductive liquid is seawater.

[0022] By the battery control circuit provided in the present application, when the positive pin line of the power-on switch and the negative pin line of the power-on switch are placed in the conductive liquid, the switch circuit is turned on, the battery pack supplies power to the load circuit through the switch circuit, when the positive pin line of the power-on switch and the negative pin line of the power-on switch are not placed in the conductive liquid, the switch circuit is turned off, the battery pack does not supply power to the load circuit, compared with the traditional mode of pressing the traditional button by hand, the control mode is simpler and more reliable, and is more corrosion-resistant. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The circuit schematic diagram of the battery control circuit provided in the embodiments of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0025] The battery control circuit provided in the embodiments of the present application comprises: a discharge circuit connected between a positive electrode of a battery pack and a negative electrode of the battery pack, wherein the discharge circuit comprises a switch circuit and a load circuit connected in sequence, the switch circuit comprises a power-on switch positive pin line and a power-on switch negative pin line;

[0026] When the power-on switch positive pin line and the power-on switch negative pin line are placed in a conductive liquid, the switch circuit is turned on, and the battery pack supplies power to the load circuit through the switch circuit;

[0027] When the power-on switch positive pin line and the power-on switch negative pin line are not placed in the conductive liquid, the switch circuit is turned off.

[0028] It should be noted that the conductive liquid in the embodiments of the present application can be any liquid that can conduct electricity, for example, it can be seawater.

[0029] The battery control circuit provided in the present application controls the output on-off of the battery pack, replaces the conventional way of manually opening and shutting off the battery path, and reduces the labor intensity of the operator. When the power-on switch positive pin line and the power-on switch negative pin line are inserted into the conductive liquid, the battery pack can output electric energy externally, that is, it can supply power to the load circuit; when the power-on switch positive pin line and the power-on switch negative pin line are not inserted into the conductive liquid, the battery pack cannot output electric energy externally, that is, it does not supply power to the load circuit.

[0030] Please refer to Figure 1 The switch circuit in the embodiments of the present application can comprise a first MOS transistor FET1 and a second MOS transistor FET2, the power-on switch positive pin line (that is, switch positive e out) is led out through the drain of the first MOS transistor FET1, and the power-on switch negative pin line (that is, switch negative f out) is led out through the gate of the second MOS transistor FET2;

[0031] The drain of the first MOS transistor FET1 is connected with the positive electrode BAT+ of the battery pack, and the source of the first MOS transistor FET1 is connected with the negative electrode BAT- of the battery pack and the gate of the second MOS transistor FET2;

[0032] The source of the second MOS transistor FET2 is connected with the negative electrode of the battery pack, and the drain of the second MOS transistor FET2 is connected with the load circuit.

[0033] In the embodiments of the present application, the MOS field effect transistor is used to form an automatic control discharge circuit by taking advantages of small on-resistance and low on-state loss.

[0034] The battery control circuit further comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit; the first voltage stabilizing circuit is connected between the source of the first MOS transistor FET1 and the gate of the first MOS transistor FET1, and the second voltage stabilizing circuit is connected between the source of the second MOS transistor FET2 and the gate of the second MOS transistor FET2.

[0035] The first MOS transistor FET1 and the second MOS transistor FET2 can both be NMOS transistors.

[0036] The first voltage stabilizing circuit comprises a first voltage stabilizing tube ZD1 and a first resistor R5 connected in parallel with the first voltage stabilizing tube ZD1, and the second voltage stabilizing circuit comprises a second voltage stabilizing tube ZD2 and a second resistor R6 connected in parallel with the second voltage stabilizing tube ZD2.

[0037] The first voltage stabilizing circuit and the second voltage stabilizing circuit can prevent the first MOS transistor FET1 and the second MOS transistor FET2 from being damaged by excessively high voltage.

[0038] The battery control circuit can further comprise a current limiting circuit connected between the drain of the first MOS transistor FET1 and the positive pin line of the power-on switch.

[0039] The current limiting circuit comprises a third resistor R2 and a fourth resistor R1 connected in series, and one connection point between the third resistor R2 and the fourth resistor R1 is connected to the positive pole of the battery pack.

[0040] Figure 1 A fifth resistor R4 is further connected in series between the fourth resistor R1 and the positive pin line of the power-on switch, and R1, R2 and R4 constitute the control current limiting resistor of the first MOS transistor FET1, and the first MOS transistor FET1 is the control electrode switch of the second MOS transistor FET2.

[0041] The battery control circuit can further comprise a filter circuit connected between the positive pole of the battery pack and the negative pole of the battery pack. The filter circuit can comprise a filter capacitor. Figure 1 The first filter capacitor C1 and the second filter capacitor C2 constitute the filter circuit.

[0042] Take Figure 1 For example, when the positive pin line of the power-on switch and the negative pin line of the power-on switch are placed in seawater, the positive pin of the power-on switch and the negative pin of the power-on switch are in a conductive state by using the conductivity of seawater (the conductivity of seawater is 33×103us / cm), the FET1 control electrode has a 10V driving voltage, and the FET1 is in a conductive state; the FET2 has a 10V driving voltage, and the FET2 is also in a conductive state. The discharge circuit of the battery pack is in a conductive state.

[0043] When the upper power switch positive pin line and the upper power switch negative pin line are not placed in seawater, the FET1 control electrode has no driving voltage, the FET1 is in a cut-off state; the FET2 has no driving voltage, and the FET2 is also in a cut-off state. The discharge circuit of the battery pack is in an open state. Energy cannot be provided to the lower circuit.

[0044] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concepts of the utility model, and only show the components related to the utility model in the diagrams, not the number, shape and size of the components when actually implemented. The shapes, number and proportions of the components when actually implemented can be arbitrarily changed, and the component layout pattern can be more complex. The structures, proportions, sizes, etc. shown in the diagrams attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not limit the implementation conditions of the utility model, so they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the utility model. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the utility model.

[0045] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0046] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery control circuit, characterized by comprising: The application relates to a battery control circuit. The battery control circuit comprises: a discharge circuit connected between a positive electrode of a battery and a negative electrode of the battery, the discharge circuit comprising a switch circuit and a load circuit connected in sequence, the switch circuit comprising a power-on switch positive pin line and a power-on switch negative pin line; When the power-on switch positive pin line and the power-on switch negative pin line are placed in a conductive liquid, the switch circuit is turned on, and the battery supplies power to the load circuit through the switch circuit; When the power-on switch positive pin line and the power-on switch negative pin line are not placed in the conductive liquid, the switch circuit is turned off.

2. The battery control circuit of claim 1, wherein, The switch circuit comprises a first MOS tube and a second MOS tube, the power-on switch positive pin line is led out through a drain of the first MOS tube, and the power-on switch negative pin line is led out through a gate of the first MOS tube; The drain of the first MOS tube is connected with the positive electrode of the battery, and a source of the first MOS tube is connected with the negative electrode of the battery and a gate of the second MOS tube; A source of the second MOS tube is connected with the negative electrode of the battery, and a drain of the second MOS tube is connected with the load circuit.

3. The battery control circuit of claim 2, wherein, The battery control circuit further comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit; the first voltage stabilizing circuit is connected between the source of the first MOS tube and the gate of the first MOS tube, and the second voltage stabilizing circuit is connected between the source of the second MOS tube and the gate of the second MOS tube.

4. The battery control circuit of claim 2, wherein, The first MOS tube and the second MOS tube are both NMOS tubes.

5. The battery control circuit of claim 3, wherein, The first voltage stabilizing circuit comprises a first voltage stabilizing tube and a first resistor connected in parallel with the first voltage stabilizing tube, and the second voltage stabilizing circuit comprises a second voltage stabilizing tube and a second resistor connected in parallel with the second voltage stabilizing tube.

6. The battery control circuit of claim 2, wherein, The battery control circuit further comprises a current limiting circuit connected between the drain of the first MOS tube and the power-on switch positive pin line.

7. The battery control circuit of claim 6, wherein, The current limiting circuit comprises a third resistor and a fourth resistor connected in series, and one connection point between the third resistor and the fourth resistor is connected with the positive electrode of the battery.

8. The battery control circuit of claim 1, wherein, The battery control circuit further comprises a filter circuit connected between the positive electrode of the battery and the negative electrode of the battery.

9. The battery control circuit of claim 8, wherein, The filter circuit comprises a filter capacitor.

10. The battery control circuit of claim 1, wherein, The conductive liquid is seawater.

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