CN209987749U - Electric vehicle charging and discharging circuit and high-voltage power distribution system - Google Patents
Electric vehicle charging and discharging circuit and high-voltage power distribution system Download PDFInfo
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- CN209987749U CN209987749U CN201822212772.8U CN201822212772U CN209987749U CN 209987749 U CN209987749 U CN 209987749U CN 201822212772 U CN201822212772 U CN 201822212772U CN 209987749 U CN209987749 U CN 209987749U
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Abstract
The utility model provides an electric vehicle charging and discharging circuit and high voltage distribution system, charging and discharging circuit includes independent setting's discharge circuit and charging circuit, charging circuit is including being used for setting up the positive branch road that charges between battery positive pole and the positive pole interface that charges and being used for setting up the negative branch road that charges between battery negative pole and negative pole interface, discharge circuit is including being used for setting up the positive branch road that discharges between battery positive pole and positive pole high voltage interface and being used for setting up the negative branch road that discharges between battery negative pole and negative high voltage interface, the cluster is equipped with positive charging relay switch on the positive branch road that charges, the cluster is equipped with negative charging relay switch on the negative charging branch road, the cluster is equipped with positive discharging relay switch on the positive discharging branch road, the cluster is equipped with negative discharging relay switch on the negative discharging branch road. The utility model provides a charging circuit and discharge circuit independent setting among the technical scheme can solve because charging circuit and discharge circuit's negative pole circuit sharing and cause the lower problem of electric motor car security performance.
Description
Technical Field
The utility model belongs to the technical field of electric vehicle charges, concretely relates to electric vehicle charge-discharge circuit and high-voltage distribution system.
Background
The high-voltage distribution box plays a role in safety protection of high-voltage discharge and charging processes of the battery pack, a safety and a relay are added on a charging and discharging circuit to perform high-voltage shunt protection, a charging and discharging main circuit and a discharging negative circuit are shared, and the charging circuit is not subjected to pre-charging control.
For example, the chinese utility model patent document with the publication number CN203013875U discloses an electric bicycle lithium battery module with heat loss protection function, wherein the negative circuit of the charging circuit and the discharging circuit is shared, which will cause the current on the discharging circuit during the charging process of the battery, and seriously threatens the safety of the electric vehicle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric vehicle charging and discharging circuit and high voltage distribution system for solve among the prior art because charging circuit and discharging circuit's negative pole circuit sharing and cause the lower problem of electric motor car security performance.
In order to achieve the above purpose, the utility model provides a technical scheme is:
the utility model provides an electric vehicle charging and discharging circuit, this charging and discharging circuit includes independent setting's discharge circuit and charging circuit, charging circuit is including being used for setting up the positive branch road that charges between battery positive pole and the positive interface that charges and being used for setting up the negative branch road that charges between battery negative pole and negative pole interface, discharge circuit is including being used for setting up the positive branch road that discharges between battery positive pole and positive high voltage interface and being used for setting up the negative branch road that discharges between battery negative pole and negative high voltage interface, the cluster is equipped with positive charging relay switch on the positive branch road that charges, the cluster is equipped with negative charging relay switch on the negative branch road that charges, the cluster is equipped with positive discharging relay switch on the positive branch road that discharges, the cluster is equipped with negative discharging relay switch on the negative branch road that discharges.
The utility model provides a technical scheme, charging circuit and discharge circuit independent setting can not the electric current appear on the in-process discharge circuit for battery charging to solve among the prior art because charging circuit and discharge circuit's negative pole circuit sharing and cause the lower problem of electric motor car security performance.
Further, the pre-charging branch is also connected in parallel with the positive discharging branch.
The pre-charging branch circuit is connected with the positive discharging branch circuit in parallel, and can be used as a pre-discharging circuit, so that large impact current generated when electric equipment on the electric vehicle is powered on can be prevented.
Furthermore, the two ends of the positive charging branch are connected with a pre-charging branch in parallel, and the pre-charging branch comprises a pre-charging relay switch and a pre-charging resistor which are sequentially connected in series.
The pre-charging branch circuit is arranged, so that large impact current can be prevented from being generated when the battery is charged.
Furthermore, a charging fuse connected with the positive charging relay switch in series is arranged on the positive charging branch.
The charging fuse is arranged, so that potential safety hazards caused by overlarge current of the charging circuit in the charging process can be prevented.
Furthermore, a discharging fuse connected with the positive discharging relay switch in series is arranged on the positive discharging branch circuit.
The discharge fuse is arranged, so that potential safety hazards caused by overlarge current of discharge current in the discharge process can be prevented.
The utility model provides an electric vehicle high voltage power distribution system, includes battery and charging and discharging circuit, and the battery passes through charging and discharging circuit and connects interface and high-pressure interface that charges, charging and discharging circuit includes the discharge circuit and the charging circuit of independent setting, charging circuit is including setting up the positive branch road that charges between the interface that charges at battery positive and setting up the negative branch road that charges between battery negative pole and negative pole interface, discharge circuit is including setting up the positive branch road that discharges between battery positive and positive high-pressure interface and setting up the negative branch road that discharges between battery negative pole and negative high-pressure interface, the cluster is equipped with positive charge relay switch on the positive branch road that charges, the cluster is equipped with negative charge relay switch on the negative charge branch road, the cluster is equipped with positive discharge relay switch on the positive discharge branch road, the cluster is equipped with negative discharge relay switch on the negative discharge branch road.
The utility model provides a technical scheme, charging circuit and discharge circuit independent setting can not the electric current appear on the in-process discharge circuit for battery charging to solve among the prior art because charging circuit and discharge circuit's negative pole circuit sharing and cause the lower problem of electric motor car security performance.
Further, the pre-charging branch is also connected in parallel with the positive discharging branch.
The pre-charging branch circuit is connected with the positive discharging branch circuit in parallel, and can be used as a pre-discharging circuit, so that large impact current generated when electric equipment on the electric vehicle is powered on can be prevented.
Furthermore, the two ends of the positive charging branch are connected with a pre-charging branch in parallel, and the pre-charging branch comprises a pre-charging relay switch and a pre-charging resistor which are sequentially connected in series.
The pre-charging branch circuit is arranged, so that large impact current can be prevented from being generated when the battery is charged.
Furthermore, a charging fuse connected with the positive charging relay switch in series is arranged on the positive charging branch.
The charging fuse is arranged, so that potential safety hazards caused by overlarge current of the charging circuit in the charging process can be prevented.
Furthermore, a discharging fuse connected with the positive discharging relay switch in series is arranged on the positive discharging branch circuit.
The discharge fuse is arranged, so that potential safety hazards caused by overlarge current of discharge current in the discharge process can be prevented.
Drawings
Fig. 1 is a schematic structural diagram of a high voltage distribution system of an electric vehicle in an embodiment of the high voltage distribution system of the present invention;
FIG. 2 is a schematic structural diagram of an electric vehicle high voltage distribution system with a pre-charging branch in an embodiment of the high voltage distribution system of the present invention;
fig. 3 is the structural schematic diagram of the electric vehicle high-voltage distribution system in the embodiment of the high-voltage distribution system of the utility model when the positive discharge circuit and the pre-charge branch are arranged in parallel.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
High voltage power distribution system embodiments:
the embodiment provides an electric vehicle high-voltage power distribution system which comprises a battery, a charging circuit and a discharging circuit and can ensure the safety of an electric vehicle in the process of charging and discharging the battery.
The structure principle of the high-voltage distribution system for the electric vehicle provided by the embodiment is shown in fig. 1, the charging circuit and the discharging circuit are independently arranged, wherein the charging circuit comprises a positive charging branch and a negative charging branch, and the discharging circuit comprises a positive discharging branch and a negative discharging branch.
The positive charging branch comprises a positive charging relay switch K11, and the negative charging branch comprises a negative charging relay switch K12; one end of the positive charging branch is connected with the positive electrode of the battery, and the other end of the positive charging branch is connected with a positive charging interface in the charging interfaces; one end of the negative charging branch is connected with the negative electrode of the battery, and the other end of the negative charging branch is connected with the negative electrode charging interface in the charging interface. After the positive charging interface and the negative charging interface of the charging interface are connected to a charging power supply, the positive charging relay switch K11 and the negative charging relay switch K12 are controlled to be closed, and the charging power supply is connected with a battery to start charging the battery.
In order to prevent the current in the charging process of the battery from being too large, a charging fuse FU1 is further arranged in the positive charging branch in series, and in the charging process, when the charging current is too large, the charging fuse FU1 fuses to stop charging the battery, so that the safety of the charging process of the battery is ensured.
The positive discharge branch comprises a positive discharge relay switch K21, and the negative discharge branch comprises a negative discharge relay switch K22; one end of the positive discharge branch is connected with the positive electrode of the battery, and the other end of the positive discharge branch is connected with the positive electrode interface of the high-voltage interface; one end of the negative discharge branch is connected with the negative electrode of the battery, and the other end of the negative discharge branch is connected with the negative electrode interface of the high-voltage interface. And when the positive discharge relay switch K21 and the negative discharge relay switch K22 are closed, the battery is connected with the electric equipment on the vehicle to supply power for the electric equipment.
In order to prevent the current in the discharging process of the battery from being overlarge, a discharging fuse FU2 is further arranged in the positive discharging branch in series, in the discharging process, when the discharging current is overlarge, the discharging fuse FU2 is fused, the battery stops supplying power to electric equipment on the vehicle, and the safety of the discharging process of the battery is guaranteed.
Because the charging circuit and the discharging circuit in the electric vehicle high-voltage distribution system provided by the embodiment are completely and independently arranged, the negative charging branch and the negative discharging branch are not arranged into one branch, the positive charging relay switch K11 and the negative charging relay switch K12 are disconnected in the discharging process of the battery, and the positive discharging relay switch K21 and the negative discharging relay switch K22 are disconnected in the charging process of the battery, so that the current generated in the charging process cannot pass through the negative branch to the electric equipment of the vehicle, and the safety performance of the electric vehicle can be improved.
The high-voltage distribution system of the electric vehicle provided by the embodiment further includes a pre-charging branch, as shown in fig. 2, the pre-charging branch includes a pre-charging relay K3 and a pre-charging resistor R arranged in series; the pre-charging branch is connected with the positive charging branch in parallel, when the battery is charged, the negative charging relay K12 and the pre-charging relay K3 are controlled to be closed firstly, and when the current is stable, the positive charging relay K11 is controlled to be closed and the pre-charging relay K3 is controlled to be opened; due to the current limiting function of the pre-charging resistor R, larger impact current cannot be generated in the charging starting process, so that the safety of the battery in the charging starting process is ensured.
Further, the positive discharging branch is also connected in parallel with the pre-charging branch, as shown in fig. 3, when the battery starts to supply power to the electric equipment on the vehicle, the pre-charging relay K3 and the negative discharging relay K22 are controlled to be closed first, and when the current is stabilized, the positive discharging relay K21 is controlled to be closed and the pre-charging relay K3 is controlled to be opened; due to the current limiting function of the pre-charging resistor R, large impact current cannot be generated in the discharging starting process, and therefore the safety of electric equipment on a vehicle in the discharging starting process is guaranteed.
Electric vehicle charge-discharge circuit embodiment:
the present embodiment provides a charging and discharging circuit for an electric vehicle, which includes a charging circuit and a discharging circuit, the charging circuit and the discharging circuit are the same as those in the above-mentioned embodiment of the high-voltage power distribution system, and the charging circuit and the discharging circuit have been described in detail in the above-mentioned embodiment of the high-voltage power distribution system, and will not be described in more detail here.
The present invention has been described with reference to specific embodiments, but the present invention is not limited to the described embodiments. Under the thought given by the utility model, the technical means in the above-mentioned embodiment is changed, replaced, modified to the mode that adopts to think easily to technical staff in this field to the effect of playing is basically the same with the utility model provides a corresponding technical means is basically the same, the utility model purpose of realization is also basically the same, and the technical scheme who forms like this finely tunes the formation to above-mentioned embodiment, and this kind of technical scheme still falls into the protection scope of the utility model.
Claims (6)
1. The charging and discharging circuit of the electric vehicle is characterized by comprising a discharging circuit and a charging circuit which are independently arranged, wherein the charging circuit comprises a positive charging branch arranged between a positive electrode and a positive electrode charging interface of the battery and a negative charging branch arranged between a negative electrode and a negative electrode charging interface of the battery;
the two ends of the positive charging branch are connected with a pre-charging branch in parallel, and the pre-charging branch comprises a pre-charging relay switch and a pre-charging resistor which are sequentially connected in series;
the pre-charge branch is also connected in parallel with the positive discharge branch.
2. The electric vehicle charging and discharging circuit according to claim 1, wherein a discharging fuse is disposed on the positive discharging branch in series with a positive discharging relay switch.
3. The electric vehicle charging and discharging circuit according to claim 1, wherein a charging fuse is provided on the positive charging branch in series with a positive charging relay switch.
4. A high-voltage power distribution system of an electric vehicle comprises a battery and a charge-discharge circuit, wherein the battery is connected with a charge interface and a high-voltage interface through the charge-discharge circuit, it is characterized in that the charging and discharging circuit comprises a discharging circuit and a charging circuit which are independently arranged, the charging circuit comprises a positive charging branch arranged between the positive electrode and the positive electrode charging interface of the battery and a negative charging branch arranged between the negative electrode and the negative electrode charging interface of the battery, the discharge circuit comprises a positive discharge branch arranged between the positive pole of the battery and the positive high-voltage interface and a negative discharge branch arranged between the negative pole of the battery and the negative high-voltage interface, a positive charging relay switch is connected in series on the positive charging branch, a negative charging relay switch is connected in series on the negative charging branch, a positive discharge relay switch is connected in series on the positive discharge branch circuit, and a negative discharge relay switch is connected in series on the negative discharge branch circuit;
the two ends of the positive charging branch are connected with a pre-charging branch in parallel, and the pre-charging branch comprises a pre-charging relay switch and a pre-charging resistor which are sequentially connected in series;
the pre-charge branch is also connected in parallel with the positive discharge branch.
5. The electric vehicle high-voltage distribution system according to claim 4, wherein a discharge fuse is provided on the positive discharge branch in series with a positive discharge relay switch.
6. The electric vehicle high-voltage distribution system according to claim 4, wherein a charging fuse is provided on the positive charging branch in series with a positive charging relay switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822212772.8U CN209987749U (en) | 2018-12-26 | 2018-12-26 | Electric vehicle charging and discharging circuit and high-voltage power distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822212772.8U CN209987749U (en) | 2018-12-26 | 2018-12-26 | Electric vehicle charging and discharging circuit and high-voltage power distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209987749U true CN209987749U (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822212772.8U Expired - Fee Related CN209987749U (en) | 2018-12-26 | 2018-12-26 | Electric vehicle charging and discharging circuit and high-voltage power distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209987749U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600279A (en) * | 2020-12-23 | 2021-04-02 | 恒大新能源汽车投资控股集团有限公司 | Battery circuit, circuit control method and device and vehicle |
| CN113246736A (en) * | 2021-04-14 | 2021-08-13 | 合肥国轩高科动力能源有限公司 | High-compatibility BDU system, positive module, negative module and quick charging module |
-
2018
- 2018-12-26 CN CN201822212772.8U patent/CN209987749U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600279A (en) * | 2020-12-23 | 2021-04-02 | 恒大新能源汽车投资控股集团有限公司 | Battery circuit, circuit control method and device and vehicle |
| CN113246736A (en) * | 2021-04-14 | 2021-08-13 | 合肥国轩高科动力能源有限公司 | High-compatibility BDU system, positive module, negative module and quick charging module |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 Termination date: 20201226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |