Electric vehicle charging pile capable of preventing current from flowing backwards
By introducing an anti-backflow module and a dynamic power distribution circuit into the charging circuit, the problem of current backflow is solved, ensuring charging safety, preventing discharge between electric vehicle batteries, and protecting the charging equipment.
Patent Information
- Application Number
- CN202520164699.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Existing charging stations and electric vehicles suffer from backflow of current during the charging process, which can lead to serious consequences such as switch explosions and fuse burnouts.
An anti-backflow module and a dynamic power distribution circuit are introduced into the charging circuit to ensure unidirectional current conduction and prevent discharge between electric vehicle batteries.
It effectively prevents backflow of current between electric vehicle batteries, eliminates discharge, ensures charging safety, and avoids damage to switches and fuses.
Smart Images
Figure CN223631383U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to direct current charging pile safety charging technical field, concretely relates to a kind of electric vehicle current reverse flow charging pile. BACKGROUND
[0002] Nowadays, the standard technical requirements of flexible multi-charging charging pile and charging stack only require built-in anti-backflow diode inside charging module, and charging pile and electric vehicle are required to have short-circuit, overcurrent, overvoltage, insulation detection, temperature and other charging safety protection respectively. When one electric vehicle is charging, the newly added electric vehicle is started on the flexible charging pile or charging stack, and when an accident occurs, it will cause two or more electric vehicle batteries to be connected, and high-voltage electric vehicles will discharge low-voltage electric vehicles. The discharge current is much larger than 1000A, causing some serious consequences such as switch explosion and fuse burning. SUMMARY
[0003] Therefore, the utility model aims to provide an electric vehicle current reverse flow charging pile to solve the above problems.
[0004] In order to solve the above technical problems, the technical scheme of the utility model is as follows: an electric vehicle current reverse flow charging pile, comprising a charging pile body, a plurality of charging circuits arranged in the charging pile body, and a dynamic power distribution circuit connected in series between adjacent charging circuits; the charging circuit comprises a charging module, a fuse, a shunt, a DC contactor, a charging interface and an anti-backflow module; the positive electrode of the charging module is connected with the input end of the fuse, the output end of the fuse is connected with one end of the positive electrode switch of the DC contactor, the other end of the positive electrode switch of the DC contactor is connected with the input end of the anti-backflow module, and the output end of the anti-backflow module is connected with the positive electrode of the charging interface; the negative electrode of the charging interface is connected with one end of the negative electrode switch of the DC contactor, the other end of the negative electrode switch of the DC contactor is connected with the input end of the shunt, and the output end of the shunt is connected with the negative electrode of the charging module.
[0005] Preferably, the anti-backflow module is an anti-backflow diode, and the current can only be unidirectionally conducted from the charging module to the charging interface.
[0006] Preferably, the dynamic power distribution circuit comprises a relay connected between adjacent positive electrodes of the charging module and also connected between adjacent negative electrodes of the charging module.
[0007] Preferably, the charging module comprises a controller and a power detection module, the controller controls the relay to realize dynamic power distribution through the power detection module.
[0008] The technical effect of the utility model mainly embodies: by increasing the anti-backflow module on the DC output bus of each charging circuit and the electric vehicle charging interface circuit, the current anti-backflow of any charging circuit is realized, so that the discharge of the electric vehicle battery to the charging pile or the discharge between the electric vehicle batteries through the charging circuit is prevented in any case, the mutual discharge between the electric vehicle batteries is fundamentally solved, and the charging safety is further ensured. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 The utility model discloses a circuit connection diagram.
[0010] The figure sign is: 1-charging pile body, 2-charging circuit, 21-charging module, 22-fuse, 23-shunt, 24-DC contactor, 25-charging interface, 26-anti-backflow module, 3-dynamic power distribution circuit, 31-relay. DETAILED DESCRIPTION
[0011] The specific embodiment of the utility model is further described in detail below in combination with the drawings, so that the technical scheme of the utility model is more easily understood and mastered.
[0012] In the embodiment, it needs to be understood that the orientation or position relation indicated by the terms "intermediate", "upper", "lower", "top", "right side", "left end", "upper", "back", "middle" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0013] In addition, in the specific embodiment, if the connection or fixing mode between components is not specially described, the connection or fixing mode can be bolt fixing or pin fixing commonly used in the prior art, or pin shaft connection, therefore, in the embodiment, it is not described in detail.
[0014] The utility model provides a kind of electric vehicle anti-current backflow charging pile, such as Figure 1As shown, including charging pile body 1, a plurality of charging circuit 2 and dynamic power distribution circuit 3 connected in series on adjacent charging circuit 2 are arranged in the charging pile body 1, the charging circuit 2 is used for charging a single electric vehicle, the dynamic power distribution circuit 3 is used for increasing the total output power of the charging circuit 2 through the idle charging circuit 2 when the charging power of the charging circuit 2 is insufficient for the charging power of the electric vehicle, so as to meet the charging demand of the electric vehicle;The charging circuit 2 includes a charging module 21, a fuse 22, a shunt 23, a DC contactor 24, a charging interface 25 and an anti-backflow module 26;The positive electrode of the charging module 21 is connected with the input end of the fuse 22, the output end of the fuse 22 is connected with one end of the positive electrode switch of the DC contactor 24, the other end of the positive electrode switch of the DC contactor 24 is connected with the input end of the anti-backflow module 26, and the output end of the anti-backflow module 26 is connected with the positive electrode of the charging interface 25;The negative electrode of the charging interface 25 is connected with one end of the negative electrode switch of the DC contactor 24, the other end of the negative electrode switch of the DC contactor 24 is connected with the input end of the shunt 23, and the output end of the shunt 23 is connected with the negative electrode of the charging module 21, by increasing the anti-backflow module 26 on the DC output bus of each way of the charging circuit 2 and the electric vehicle charging interface 25 circuit, any charging circuit 2 can realize current anti-backflow, so as to solve any situation, and prevent the electric vehicle battery from discharging to the charging pile or discharging between the electric vehicle batteries through the charging circuit, fundamentally solve the mutual connection between the electric vehicle batteries, and further ensure the charging safety.
[0015] Preferably, the anti-backflow module 26 is an anti-backflow diode, and the current can only be unidirectionally conducted from the charging module 21 to the charging interface 25.
[0016] Preferably, the dynamic power distribution circuit 3 includes a relay 31 connected between adjacent positive electrodes of the charging module 21 and also connected between adjacent negative electrodes of the charging module 21.
[0017] Preferably, the charging module 21 includes a controller and a power detection module, the controller controls the relay 31 to realize dynamic power distribution through the power detection module.
[0018] The technical effects of the utility model mainly embody that: by increasing the anti-backflow module on the DC output bus of each way of the charging circuit and the electric vehicle charging interface circuit, any charging circuit can realize current anti-backflow, so as to solve any situation, prevent the electric vehicle battery from discharging to the charging pile or discharging between the electric vehicle batteries through the charging circuit, fundamentally solve the mutual connection between the electric vehicle batteries, and further ensure the charging safety.
[0019] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.
Claims
1. An electric vehicle anti-current backflow charging pile, characterized in that, The charging pile body, a plurality of charging circuits arranged in the charging pile body and a dynamic power distribution circuit connected in series on adjacent charging circuits; the charging circuit comprises a charging module, a fuse, a shunt, a DC contactor, a charging interface and an anti-backflow module; the positive electrode of the charging module is connected with the input end of the fuse, the output end of the fuse is connected with one end of the positive electrode switch of the DC contactor, the other end of the positive electrode switch of the DC contactor is connected with the input end of the anti-backflow module, and the output end of the anti-backflow module is connected with the positive electrode of the charging interface; the negative electrode of the charging interface is connected with one end of the negative electrode switch of the DC contactor, the other end of the negative electrode switch of the DC contactor is connected with the input end of the shunt, and the output end of the shunt is connected with the negative electrode of the charging module.
2. The electric vehicle anti-current backflow charging pile of claim 1, wherein, The anti-backflow module is an anti-backflow diode, and the current can only be unidirectionally conducted from the charging module to the charging interface.
3. The electric vehicle anti-current backflow charging pile of claim 1, wherein, The dynamic power distribution circuit comprises a relay connected between adjacent positive electrodes of the charging module and also connected between adjacent negative electrodes of the charging module.
4. The electric vehicle anti-current backflow charging pile of claim 3, wherein, The charging module comprises a controller and a power detection module, the controller controls the relay to realize dynamic power distribution through the power detection module.