Brake unloading plate circuit for baby carriage

Abstract

The brake unloading board circuit comprises a voltage acquisition circuit and a voltage discharge circuit, the voltage acquisition circuit comprises a bus switch MOS tube, the two ends of the bus switch MOS tube are electrically connected with a power supply, a resistor R38 and a resistor R39 are connected in series between the two ends of the bus switch MOS tube and the power supply, and the resistor R38 and the resistor R39 are electrically connected with the voltage discharge circuit. And a capacitor C22 is connected in parallel between the resistor R39 and the bus switch MOS tube. When the protection circuit is used, the voltages at the two ends of the bus switch MOS tube are compared to judge whether the MOS tube at the position is turned on and turned off and judge whether the MOS tube at the position of the unloading resistor is turned on and turned off, so that bus charges are discharged, and a battery is protected under extreme conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of brake unloading circuits for baby carriages, in particular to a brake unloading plate circuit for baby carriages. Background Art

[0002] Children's electric cars are motor-driven toy cars that children can drive and sit on. Children's electric cars usually come with a remote control that can be controlled by parents. Children can also control the car themselves using the accelerator pedal, but parents are still required to supervise the car to ensure safety.

[0003] Currently, most baby strollers use three-phase brushless DC motors. However, when the three-phase brushless DC motor is performing energy feedback braking, a reverse charging current will flow back to the busbar, thereby reverse charging the battery. Since the battery cannot be charged in some harsh environments (low temperature), this part of the energy needs to be discharged to protect the battery. Utility Model Content

[0004] The purpose of the utility model is to provide a brake unloading plate circuit for a baby carriage to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A brake unloading plate circuit for a baby carriage includes a voltage collection circuit and a voltage discharge circuit. The voltage collection circuit includes a bus switch MOS tube. Both ends of the bus switch MOS tube are electrically connected to a power supply. Resistors R38 and R39 are connected in series between both ends of the bus switch MOS tube and the power supply. A capacitor C22 is connected in parallel between the resistor R39 and the bus switch MOS tube.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. When the utility model is used, by comparing the voltages at both ends of the bus switch MOS tube, it is determined whether to turn on and off the MOS tube at the location and whether to turn on and off the MOS tube at the unloading resistor, thereby discharging the bus charge and realizing the protection of the battery under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model discloses a voltage collection circuit diagram of a brake unloading plate circuit for a baby carriage.

[0010] Figure 2 The utility model discloses a voltage discharge circuit diagram of a brake unloading plate circuit for a baby carriage. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0012] In the present utility model, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present utility model is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present utility model. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present utility model with unnecessary details. Therefore, the present utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present utility model.

[0013] Example

[0014] See also Figures 1-2 In an embodiment of the utility model, a brake unloading plate circuit for a baby carriage includes a voltage collection circuit and a voltage discharge circuit. The voltage collection circuit includes a bus switch MOS tube. Both ends of the bus switch MOS tube are electrically connected to a power supply. Resistors R38 and R39 are also connected in series between the two ends of the bus switch MOS tube and the power supply. A capacitor C22 is connected in parallel between the resistor R39 and the bus switch MOS tube.

[0015] By comparing the voltages across the bus switch MOS tube, it is determined whether to turn on and off the MOS tube at that location and whether to turn on and off the MOS tube at the unloading resistor, thereby discharging the bus charge and protecting the battery under extreme conditions.

[0016] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A brake unloading plate circuit for a baby carriage, characterized in that: It includes a voltage collection circuit and a voltage discharge circuit. The voltage collection circuit includes a bus switch MOS tube. Both ends of the bus switch MOS tube are electrically connected to the power supply. Resistors R38 and R39 are also connected in series between the two ends of the bus switch MOS tube and the power supply. A capacitor C22 is connected in parallel between the resistor R39 and the bus switch MOS tube.

Images