Surface-mounted rectifier bridge for new energy automobile

Abstract

The utility model relates to the technical field of electronic components, and provides a patch type rectifier bridge for a new energy automobile, which comprises a shell and four diodes, the four diodes are connected to form a bridge type circuit structure, anodes of two diodes are connected together to form an anode output end, and cathodes of the other two diodes are connected together to form a cathode output end; the over-current protection circuit further comprises an over-current protection structure, the over-current protection structure comprises a fuse connected to the input end of the rectifier bridge in series, and the over-current protection structure adopts the mode that the fuse is combined with a self-recovery fuse. The fuse is fused when the current in the circuit exceeds a rated value, the circuit is cut off rapidly, and the rectifier bridge and a post-stage circuit are protected from being damaged by overcurrent. The resettable fuse is rapidly heated when an overcurrent fault occurs in the circuit, and is automatically cooled and recovered to a low-resistance state after the fault is eliminated, so that the circuit recovers normal work, and the resettable fuse can avoid the trouble of frequently replacing the fuse.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, and specifically, to a patch-type rectifier bridge for new energy vehicles. Background Art

[0002] Various electrical systems in new energy vehicles, such as drive motors, battery management systems, etc., often require large power. This may cause the rectifier bridge to handle high currents, easily exceeding its design rating.

[0003] For example, when accelerating or climbing, the drive motor may require a large amount of current to provide sufficient power, which puts the rectifier bridge under greater current pressure, and the electrical system of new energy vehicles may fail, such as short circuit, ground fault, etc. These faults will cause abnormal increase in current, causing the rectifier bridge to overcurrent, and the motor winding short circuit may cause the current to rise sharply, exceeding the rectifier bridge's bearing capacity. In addition, new energy vehicles will be affected by various environmental factors during operation, such as temperature, humidity, vibration, etc. These factors may affect the performance of the rectifier bridge, making it more prone to overcurrent, and the high temperature environment may reduce the heat dissipation effect of the rectifier bridge, causing its temperature to rise, thereby reducing its rated current carrying capacity. Utility Model Content

[0004] The utility model proposes a patch rectifier bridge for new energy vehicles. In new energy vehicles, the rectifier bridge often faces the risk of overcurrent. Overcurrent may be caused by many reasons, such as a sudden increase in load in the circuit, a short circuit fault, or an abnormal fluctuation of the external power supply. The device can reduce the danger caused by the above problems when such problems occur.

[0005] The technical solution of the utility model is as follows: a patch-type rectifier bridge for new energy vehicles, comprising a housing and four diodes, wherein the four diodes are connected to form a bridge circuit structure, wherein the anodes of two diodes are connected together to form a positive output terminal, and the cathodes of the other two diodes are connected together to form a negative output terminal;

[0006] The device also includes an overcurrent protection structure, wherein the overcurrent protection structure includes a fuse connected in series to the input end of the rectifier bridge.

[0007] Furthermore, an inner wall of the housing is provided with a mounting groove adapted to the fuse.

[0008] Furthermore, an overheating protection structure is also included, which includes a central control system, a temperature sensor and a heat sink installed on the rectifier bridge. The central control system is connected to the temperature sensor, and the temperature sensor is arranged inside the rectifier bridge.

[0009] Further, an overvoltage protection structure is also included. The overvoltage protection structure includes a varistor and a transient voltage suppression diode connected in parallel at the input end of the rectifier bridge. When the voltage across the rectifier bridge exceeds a certain threshold, the resistance value of the varistor decreases sharply to absorb the surge voltage in the power grid. The transient voltage suppression diode clamps the excessive voltage to a safe level instantaneously.

[0010] Further, the fuse is a self - resetting fuse.

[0011] Further, a reverse protection diode is also included. The reverse protection diode is connected in parallel at the output end of the rectifier bridge.

[0012] Further, a filter capacitor is also included. The filter capacitor is connected in parallel at the output end of the rectifier bridge.

[0013] The working principle and beneficial effects of the present utility model are as follows:

[0014] 1. The surface - mount rectifier bridge for new energy vehicles provided by the present utility model adopts a combination of multiple protection structures, which can comprehensively and effectively protect the rectifier bridge, improving its reliability and stability.

[0015] 2. The overvoltage protection adopts a combination of a varistor and a transient voltage suppression diode, which can quickly and effectively absorb the surge voltage in the power grid and prevent excessive voltage from being applied to the rectifier bridge.

[0016] 3. The over - current protection adopts a combination of a fuse and a self - resetting fuse, which can cut off the power supply in time when an over - current fault occurs in the circuit, protecting the rectifier bridge and the subsequent circuit from damage. At the same time, the self - resetting fuse can also avoid the trouble of frequent fuse replacement.

[0017] 4. The over - heat protection adopts a combination of a temperature sensor and a heat sink, which can monitor the working temperature of the rectifier bridge in real - time and take effective heat - dissipation measures to reduce the working temperature of the rectifier bridge and prevent over - heat damage.

[0018] 5. The use of other protection structures such as reverse protection diodes and filter capacitors can further improve the performance and reliability of the rectifier bridge and provide better protection for the subsequent circuit.

[0019] 6. The rectifier bridge is a surface - mount rectifier bridge. The surface - mount rectifier bridge is small in volume and suitable for surface mounting on high - density circuit boards. It has good electrical performance and heat - dissipation performance, meeting the requirements of miniaturization and light - weight of modern electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0021] Figure 1 Schematic diagram of the rectifier bridge structure in the present utility model;

[0022] Figure 2 is Figure 1 schematic diagram of the internal structure of.

[0023] In the figure: 1. Rectifier bridge; 2. Fuse. Specific implementation manner

[0024] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0025] Embodiment 1

[0026] As Figures 1 to 2 shown, this embodiment proposes a surface-mounted rectifier bridge for new energy vehicles, including a housing and four diodes. The four diodes are connected into a bridge circuit structure, where the anodes of two diodes are connected together to form a positive output terminal, and the cathodes of the other two diodes are connected together to form a negative output terminal;

[0027] It further includes an overcurrent protection structure, where the overcurrent protection structure includes a fuse 2 connected in series at the input end of the rectifier bridge. The fuse 2 in the overcurrent protection structure melts when the current in the circuit exceeds its rated value, quickly cutting off the circuit, thereby protecting the rectifier bridge and the subsequent circuit from overcurrent damage. The rated current of the fuse 2 should be reasonably selected according to the working current requirements of the rectifier bridge and the subsequent circuit to ensure that the fuse 2 does not malfunction under normal working current, and can respond in a timely manner when an overcurrent fault occurs. At the same time, the installation position of the fuse 2 should be convenient for replacement and maintenance, and a suitable fuse 2 or self-resetting fuse 2 is selected according to the rated current of the circuit.

[0028] Furthermore, the rectifier bridge is a surface-mounted rectifier bridge. The surface-mounted rectifier bridge is small in size and suitable for surface mounting on a high-density circuit board. It has good electrical performance and heat dissipation performance, and can meet the requirements of miniaturization and lightweight of modern electronic devices.

[0029] Furthermore, the inner wall of the housing is provided with an installation groove adapted to the fuse, and the installation groove facilitates the installation of the fuse.

[0030] Furthermore, it also includes an overheat protection structure. The overheat protection structure includes a central control system, a temperature sensor, and a heat sink installed on the rectifier bridge. The central control system is connected to the temperature sensor. The temperature sensor is arranged inside the rectifier bridge. When the operating temperature of the rectifier bridge exceeds a certain threshold, the central control system issues an alarm signal and cuts off the power supply. The temperature sensor can monitor the operating temperature of the rectifier bridge in real time. When the temperature exceeds a certain threshold, it issues an alarm signal or cuts off the power supply to protect the rectifier bridge from overheat damage. Common temperature sensors include thermistors, thermocouples, etc., and a suitable temperature sensor can be selected according to actual needs.

[0031] Furthermore, it also includes an overvoltage protection structure. The overvoltage protection structure includes a varistor and a transient voltage suppressor diode connected in parallel at the input end of the rectifier bridge; when the voltage across the rectifier bridge exceeds a certain threshold, the resistance value of the varistor decreases sharply to absorb the surge voltage in the power grid, and the transient voltage suppressor diode clamps the excessive voltage to a safe level instantly to protect the rectifier bridge and the subsequent circuit from overvoltage impact.

[0032] Furthermore, the fuse 2 is a self - resetting fuse 2. The self - resetting fuse 2 rapidly heats up when an over - current fault occurs in the circuit, and its resistance value increases sharply to limit the further increase of the current. After the fault is eliminated, it automatically cools down and returns to the low - resistance state to make the circuit resume normal operation. The self - resetting fuse 2 rapidly heats up when an over - current fault occurs in the circuit, and its resistance value increases sharply to limit the further increase of the current. When the fault is eliminated, the self - resetting fuse 2 automatically cools down and returns to the low - resistance state to make the circuit resume normal operation. The self - resetting fuse 2 has an automatic recovery function, avoiding the trouble of frequently replacing the fuse 2. When selecting the self - resetting fuse 2, parameters such as its response time, recovery time, and maximum operating current should be considered to ensure that it can effectively protect the rectifier bridge and the subsequent circuit under different over - current conditions. There are various models of self - resetting fuses 2, and the following are some common series and models;

[0033] Surface - mount self - resetting fuse:

[0034] 0603 series: The rated voltage is usually between 6V and 16V, and the rated current range is 0.1A - 1A. It is suitable for electronic devices with high space requirements and small current demands, such as the motherboard circuit protection of small portable electronic devices.

[0035] 0805 series: The rated voltage is 6V to 16V, and the rated current is 0.05A - 10A. The application scenario is relatively wide and can be used for some medium - power electronic devices, such as the over - current protection of the internal circuits of mobile phones, tablet computers, etc.

[0036] 1206 series: Rated voltage from 6V to 60V, rated current from 0.05A to 2A. This series can withstand relatively high voltages and can be used for the circuit protection of some circuits with higher voltages and moderate currents, such as Circuit 1 of some industrial control equipment.

[0037] 1210 series: Rated voltage from 6V to 30V, rated current from 0.05A to 2A. It is commonly used in circuits that do not have particularly stringent space requirements but need a certain overcurrent protection ability, such as the power supply circuit of some small household appliances.

[0038] 1812 series: Rated voltage from 6V to 60V, rated current from 0.1A to 3.5A. It has a relatively large power handling capacity and is suitable for the overcurrent protection of some electronic devices or circuit modules with slightly larger power.

[0039] 2920 series: Rated voltage from 6V to 60V, rated current from 0.3A to 3A. It is used in some equipment that has relatively loose space requirements but high overcurrent protection requirements, such as some communication devices with relatively large power.

[0040] Plug-in self-recovery fuses:

[0041] A16 series: Rated voltage 16V, rated current from 0.9A to 18A. It is suitable for some circuits that require a voltage of 16V and relatively large currents, such as the power input circuit of some industrial equipment.

[0042] A30 series: Rated voltage 30V, rated current from 0.5A to 9A. It can be used for the circuit protection of some circuits with medium voltages and medium currents, such as the power supply circuit of some small power amplifiers.

[0043] A60 series: Rated voltage 60V, rated current from 0.05A to 5A. It is commonly used in circuits that require relatively high voltages and not particularly large current demands, such as the output circuit protection of some high-voltage power supplies.

[0044] A72 series: Rated voltage 72V, rated current from 0.05A to 3.75A. It is suitable for some special circuits that require relatively high voltages, such as the circuit protection of some high-voltage electronic instruments.

[0045] A240 series: Rated voltage 240V, rated current from 0.05A to 2A. It can be used in some high-voltage and low-current circuit environments, such as the overcurrent protection of some high-voltage power adapters.

[0046] A250 series: Rated voltage 250V, rated current from 0.03A to 2A. It is commonly used in circuits that require a voltage close to 250V, such as some specific industrial control circuits.

[0047] A600 series: rated voltage 600V, rated current 0.11A - 0.16A, mainly applied to special circuits with extremely high voltage requirements, such as the auxiliary circuit protection of some large high-voltage power equipment 1.

[0048] When actually selecting the model of the self-recovery fuse, it is necessary to comprehensively consider factors such as the specific working voltage, normal working current, fault current magnitude, and ambient temperature of the circuit.

[0049] Furthermore, it also includes a reverse protection diode. The reverse protection diode is connected in parallel at the output end of the rectifier bridge. The reverse protection diode prevents the reverse electromotive force generated by the inductive element in the subsequent circuit at the moment of power-off from damaging the rectifier bridge, and its conduction direction is opposite to the output direction of the rectifier bridge.

[0050] Furthermore, it also includes a filter capacitor. The filter capacitor is connected in parallel at the output end of the rectifier bridge. The filter capacitor filters out the ripple voltage in the output DC, improves the quality of the output DC, and at the same time provides a certain amount of energy support for the subsequent circuit when the circuit has an instantaneous power-off or voltage fluctuation. Connecting a reverse protection diode in parallel at the output end of the rectifier bridge prevents the reverse electromotive force generated by the inductive element in the subsequent circuit at the moment of power-off from damaging the rectifier bridge. Connecting a filter capacitor in parallel at the output end of the rectifier bridge filters out the ripple voltage in the output DC and improves the quality of the output DC. At the same time, the filter capacitor can also play a certain energy storage role and provide a certain amount of energy support for the subsequent circuit when the circuit has an instantaneous power-off or voltage fluctuation.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The patch type rectifier bridge for new energy vehicles is characterized in that, It includes a housing and four diodes, and the four diodes are connected into a bridge circuit structure, where the anodes of two diodes are connected together to form a positive output terminal, and the cathodes of the other two diodes are connected together to form a negative output terminal; It further includes an overcurrent protection structure, and the overcurrent protection structure includes a fuse connected in series at the input end of the rectifier bridge.

2. The surface-mounted rectifier bridge for new energy vehicles according to claim 1, characterized in that, The fuse is a self - restoring fuse.

3. The surface-mounted rectifier bridge for new energy vehicles according to claim 1, wherein, An installation groove adapted to the fuse is provided on the inner wall of the housing.

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