CN220421422U - Direct current charging's precharge protection device - Google Patents
Direct current charging's precharge protection device Download PDFInfo
- Publication number
- CN220421422U CN220421422U CN202321400345.7U CN202321400345U CN220421422U CN 220421422 U CN220421422 U CN 220421422U CN 202321400345 U CN202321400345 U CN 202321400345U CN 220421422 U CN220421422 U CN 220421422U
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- relay
- charging
- input capacitor
- converter
- protector
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- 230000001012 protector Effects 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a direct-current charging pre-charging protection device, which comprises a converter, a pre-charging protector, a resistor, a working relay, an input capacitor, a bridge topological piece and a power supply, wherein the relay and the input capacitor are connected in series on the converter; the relay is connected with a pre-charge protector and a resistor in parallel, and the pre-charge protector is close to one side of the converter; the input capacitor is connected with a bridge topology in parallel; the bridge topology is electrically connected with a power supply; the pre-charging protector is one of a protection relay or a diode; according to the device, when the plug-in converter is connected with a direct-current power supply instantly, before the working relay is closed, the input capacitor is charged through the pre-charge protector and the resistor, and the input capacitor voltage can reach 90% of the input voltage only by 1-2S, so that the charging device cannot be damaged when the working relay is closed instantly because the voltage difference between the input voltage and the input capacitor voltage is small and the current generated at the moment is in the allowable range of the relay.
Description
Technical Field
The utility model relates to the technical field of circuit protection, in particular to a direct-current charging pre-charging protection device.
Background
With the development of electronic products, the use of batteries has been popular, and the link of battery charging is unavoidable. For products with relatively large battery capacity, the charging of the product is mostly a main switch adopting a relay as a power supply. For the charging circuit, at the moment of closing the relay, the input capacitor is equivalent to a short circuit, the current at two ends of the input capacitor can be suddenly changed, and only one small impedance of the relay is provided in the loop, so that a large current is provided, the relay overcurrent generates high-temperature overheat to cause adhesion, and the product is extremely easy to damage, so that the design of the direct-current charging pre-charging protection device is necessary. The common use in the industry adopts a scheme of pre-charging a relay, the cost is relatively high, and a matched circuit for relay control is also needed.
Disclosure of Invention
First, the technical problem to be solved
The utility model aims to provide a direct-current charging pre-charging protection device which is used for solving the existing defects and saving design cost and space.
(II) summary of the utility model
In order to solve the technical problems, the utility model provides the following technical scheme: the direct-current charging pre-charging protection device comprises a converter, a pre-charging protector, a resistor, a working relay, an input capacitor, a bridge topology part and a power supply, wherein the relay and the input capacitor are connected in series on the converter.
Preferably, the relay is connected with a pre-charge protector and a resistor in parallel, and the pre-charge protector is close to one side of the converter.
Preferably, a bridge topology is connected in parallel to the input capacitance.
Preferably, the bridge topology is electrically connected to a power source.
Preferably, the pre-charge protector is one of a protection relay or a diode.
(III) beneficial effects
The utility model provides a direct-current charging pre-charging protection device, which has the advantages that: according to the device, when the plug-in converter is connected with a direct-current power supply instantly, before the working relay is closed, the input capacitor is charged through the pre-charge protector and the resistor, and the voltage of the input capacitor can reach 90% of the input voltage only by 1-2S, so that the charging device cannot be damaged when the working relay is closed instantly because the voltage difference between the input voltage and the input capacitor voltage is small and the current generated at the moment is in the allowable range of the relay; meanwhile, when the device is plugged with a direct-current power supply, the pre-charging protector and the resistor work, the link of controlling to close the pre-charging circuit relay is reduced, and the scheme is simple in structure and low in cost, and meanwhile, the device also has a reverse connection preventing function, so that the device is easy to be applied to a charging module product of which the charging power supply is a plug-in direct-current source.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure connection of the present utility model.
In the figure: 1. a converter; 2. a pre-charge protector; 3. a resistor; 4. a work relay; 5. an input capacitance; 6. a bridge topology; 7. and a power supply.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, an embodiment of the present utility model is provided: the utility model provides a direct current charging's precharge protection device, including converter 1, precharge protector 2, resistance 3, work relay 4, input electric capacity 5, bridge topology spare 6 and power 7, connect in series relay 4 and input electric capacity 5 on the converter 1, connect in parallel precharge protector 2 and resistance 3 on the relay 4, precharge protector 2 is close to one side of converter 1, connect in parallel bridge topology spare 6 on the input electric capacity 5, bridge topology spare 6 and power 7 electric connection, precharge protector 2 is one of protection relay or diode, and when precharge protector 2 is the diode, the schematic diagram of the device is as shown in figure 1;
specifically, when in use, firstly, when the direct current source of the converter 1 arranged in the device is in contact, the pre-charge protector 2, the resistor 3 and the input capacitor 5 form a loop, the current is limited due to the existence of the resistor 3, the current at two ends of the input capacitor 5 is blocked from suddenly changing, the voltage of the input capacitor 5 is increased, and the relay works; after 4 is closed, the current no longer passes through the pre-charge protector 2 and the resistor 3, and steady state charging is carried out through the working relay 4, and at the moment, the pre-charge protector 2 and the resistor 3 play a role in protection.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (2)
1. The utility model provides a direct current charging's precharge protection device, includes converter (1), precharge protector (2), resistance (3), work relay (4), input capacitor (5), bridge topology (6) and power (7), its characterized in that: the relay (4) and the input capacitor (5) are connected in series on the converter (1); the relay (4) is connected with a pre-charge protector (2) and a resistor (3) in parallel, and the pre-charge protector (2) is close to one side of the converter (1); the input capacitor (5) is connected with a bridge topology (6) in parallel; the bridge topology (6) is electrically connected to a power source (7).
2. The pre-charge protection device for direct current charging according to claim 1, wherein: the pre-charge protector (2) is one of a protection relay or a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321400345.7U CN220421422U (en) | 2023-06-02 | 2023-06-02 | Direct current charging's precharge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321400345.7U CN220421422U (en) | 2023-06-02 | 2023-06-02 | Direct current charging's precharge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220421422U true CN220421422U (en) | 2024-01-30 |
Family
ID=89653024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321400345.7U Active CN220421422U (en) | 2023-06-02 | 2023-06-02 | Direct current charging's precharge protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220421422U (en) |
-
2023
- 2023-06-02 CN CN202321400345.7U patent/CN220421422U/en active Active
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