CN216580206U - Power battery high-voltage relay system - Google Patents
Power battery high-voltage relay system Download PDFInfo
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- CN216580206U CN216580206U CN202122795519.1U CN202122795519U CN216580206U CN 216580206 U CN216580206 U CN 216580206U CN 202122795519 U CN202122795519 U CN 202122795519U CN 216580206 U CN216580206 U CN 216580206U
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- voltage relay
- control circuit
- side switch
- switch control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model provides a power battery high voltage relay system, includes high voltage battery, relay battery, high limit on-off control circuit, low limit on-off control electricity, couples the negative pole high voltage relay of high voltage battery negative pole, couples the anodal positive pole high voltage relay of high voltage battery, couples the low voltage relay of relay power. The low-side switch control circuit comprises a battery management system, a first low-side switch control circuit and a second low-side switch control circuit; the battery management system sends a first control signal and a second control signal to the first low-side switch control circuit and the second low-side switch control circuit respectively; the low side of the positive high-voltage relay is coupled with the first low-side switch control circuit, and the high side of the positive high-voltage relay is coupled with the low-voltage relay; the low side of the negative high-voltage relay is coupled with the second low-side switch control circuit, and the high side of the negative high-voltage relay is coupled with the low-voltage relay; the high-side switch control circuit comprises a vehicle control unit, and the vehicle control unit sends a third control signal to the low-voltage relay to control the low-voltage relay to be switched on or switched off.
Description
Technical Field
The utility model relates to a new energy automobile high-voltage relay, in particular to a high-voltage relay control system.
Background
In recent years, electric vehicles have been developed rapidly. The high-voltage direct-current relay of the new energy automobile is an important connecting piece between a battery system and a motor controller, has great influence on the safety and the reliability of the automobile, and along with the rapid development of the industry, each host factory/battery pack factory also puts new requirements on the control of the high-voltage direct-current relay for the new energy automobile, for example, the relay needs to be quickly disconnected in collision, and the relay adhesion caused by rebound cannot occur in normal control.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a power battery high-voltage relay system, wherein the driving high bottom edges of the high-voltage relays are respectively controlled by different controllers, so that the control of the high-voltage relays is safer.
The power battery high-voltage relay system of the utility model comprises: the high-voltage relay comprises a high-voltage battery, a relay battery, a high-side switch control circuit, a low-side switch control circuit, a negative electrode high-voltage relay coupled with the negative electrode of the high-voltage battery, a positive electrode high-voltage relay coupled with the positive electrode of the high-voltage battery, and a low-voltage relay coupled with a relay power supply.
The low-side switch control circuit comprises a battery management system, a first low-side switch control circuit and a second low-side switch control circuit.
The battery management system sends a first control signal to the first low-side switch control circuit, and the battery management system sends a second control signal to the second low-side switch control circuit.
The low side of the positive high-voltage relay is coupled with the first low-side switch control circuit, and the high side of the positive high-voltage relay is coupled with the low-voltage relay.
The low side of the negative high-voltage relay is coupled with the second low-side switch control circuit, and the high side of the negative high-voltage relay is coupled with the low-voltage relay.
The high-side switch control circuit comprises a vehicle control unit, and the vehicle control unit sends a third control signal to the low-voltage relay to control the low-voltage relay to be switched on or switched off.
In one embodiment, the power battery high voltage relay system further comprises a pre-charge relay coupled to the positive pole of the high voltage battery, and the battery management system sends a fourth control signal to the high side of the pre-charge relay.
In one embodiment, the first low-side switch control circuit comprises a MOS transistor.
In one embodiment, the second low-side switch control circuit comprises a MOS transistor.
In one embodiment, the negative high voltage relay low side drives a bi-directional transient diode.
In one embodiment, the low side of the positive high voltage relay drives a bidirectional transient diode.
In one embodiment, the high-side switch control circuit and the first low-side switch control circuit jointly control the on or off of the positive high-voltage relay.
In one embodiment, the high-side switch control circuit and the second low-side switch control circuit jointly control the on or off of the negative high-voltage relay.
The technical scheme of the utility model has the following advantages:
1. the relay can be switched off rapidly;
2. the characteristic points of the relay can be avoided to prevent the bounce of the relay caused by the energy backflow;
3. ensuring that the relay can be truly switched off.
Drawings
The foregoing summary, as well as the following detailed description of the utility model, will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed invention. In the drawings, like reference characters designate the same or similar elements.
Fig. 1 shows a schematic diagram of a power cell high voltage relay system according to an embodiment of the utility model.
Detailed Description
The detailed features and advantages of the present invention are described in detail in the detailed description which follows, and will be sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention will be easily understood by those skilled in the art from the description, claims and drawings disclosed in the present specification.
In recent years, electric vehicles have been developed rapidly. The high-voltage direct-current relay of the new energy automobile is an important connecting piece between a battery system and a motor controller, has great influence on the safety and the reliability of the automobile, and along with the rapid development of the industry, each host factory/battery pack factory also puts new requirements on the control of the high-voltage direct-current relay for the new energy automobile, for example, the relay needs to be quickly disconnected in collision, and the relay adhesion caused by rebound cannot occur in normal control.
In order to quickly release the relay and avoid the bounce of the relay caused by the contact dissociation, the utility model provides a power battery high-voltage relay system.
Fig. 1 shows a power cell high voltage relay system according to an embodiment of the utility model. This power battery high voltage relay system includes: a high voltage battery (HV battery)101, a relay power supply (LV battery)102, a high side switch control circuit 103, a low side switch control circuit, a negative high voltage relay 107 coupled to the negative electrode of the high voltage battery, a positive high voltage relay 108 coupled to the positive electrode of the high voltage battery, and a low voltage relay 109 coupled to the relay power supply.
The low side switch control circuit includes a Battery Management System (BMS)104, a first low side control circuit 105, and a second low side control circuit 106.
The Battery Management System (BMS) sends a first control signal to the first low side switch control circuit 105, and the Battery Management System (BMS) sends a second control signal to the second low side switch control circuit 106.
The low side of the positive high-voltage relay is coupled to the first low-side switch control circuit 105, and the high side of the positive high-voltage relay is coupled to the low-voltage relay 109.
The low side of the negative high voltage relay is coupled to the second low side switch control circuit 106, and the high side of the negative high voltage relay is coupled to the low voltage relay 109.
The high-side switch control circuit 103 includes a vehicle control unit (HCU). And the vehicle control unit (HCU) sends a third control signal to control the low-voltage relay to be switched on or switched off.
In one embodiment, the high-side switch control circuit and the first low-side switch control circuit jointly control the on or off of the positive high-voltage relay.
In one embodiment, the high-side switch control circuit and the second low-side switch control circuit jointly control the on or off of the negative high-voltage relay.
In one embodiment, the power cell high voltage relay system further comprises a pre-charge relay coupled to the positive pole of the high voltage battery. The battery management system sends a fourth control signal to the high side of the pre-charge relay.
In one embodiment, the first low-side switch control circuit comprises a MOS transistor.
In one embodiment, the second low-side switch control circuit comprises a MOS transistor.
In one embodiment, the negative high voltage relay is connected in parallel with a bidirectional transient diode (TVS).
In one embodiment, the positive high voltage relay is connected in parallel with a bidirectional transient diode (TVS).
The working sequence of the power battery high-voltage relay system is VCU closed relay low-voltage power supply control, pre-charging relay closing, negative relay low-side closing and positive relay low-side closing
According to the utility model, the power supply and the ground of the relay are respectively controlled by two different controllers (a battery management system and a whole vehicle control system) to realize the control of the relay, so that the situations that the relay is failed on one side and cannot be disconnected in time are prevented. In addition, the bidirectional transient diode (TVS) tube is used for replacing the unidirectional TVS tube, the relay can be rapidly released, for example, the original 30ms is improved to be within 8ms, the energy in the coil is rapidly released, and the bounce of the relay caused by contact dissociation cannot occur. The scheme can realize safe and controllable relay control through few hardware interface resources.
The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.
Also, it should be noted that although the present invention has been described with reference to the current specific embodiments, it should be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes or substitutions may be made without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments be included within the scope of the claims of the present application.
Claims (8)
1. A power battery high voltage relay system, comprising: the high-voltage relay comprises a high-voltage battery, a relay battery, a high-side switch control circuit, a low-side switch control circuit, a negative electrode high-voltage relay coupled with the negative electrode of the high-voltage battery, a positive electrode high-voltage relay coupled with the positive electrode of the high-voltage battery, and a low-voltage relay coupled with a relay power supply;
the low-side switch control circuit comprises a battery management system, a first low-side switch control circuit and a second low-side switch control circuit;
the battery management system sends a first control signal to the first low-side switch control circuit, and sends a second control signal to the second low-side switch control circuit;
the low side of the positive high-voltage relay is coupled with the first low-side switch control circuit, and the high side of the positive high-voltage relay is coupled with the low-voltage relay;
the low side of the negative high-voltage relay is coupled with the second low-side switch control circuit, and the high side of the negative high-voltage relay is coupled with the low-voltage relay;
the high-side switch control circuit comprises a vehicle control unit, and the vehicle control unit sends a third control signal to the low-voltage relay to control the low-voltage relay to be switched on or switched off.
2. The power cell high voltage relay system of claim 1 further comprising a pre-charge relay coupled to the positive pole of the high voltage battery, the battery management system sending a fourth control signal to the high side of the pre-charge relay.
3. The power cell high voltage relay system of claim 1, wherein the first low side switch control circuit comprises a MOS transistor.
4. The power cell high voltage relay system of claim 1, wherein the second low side switch control circuit comprises a MOS transistor.
5. The power cell high voltage relay system of claim 1, wherein the negative high voltage relay low side drives a bi-directional transient diode.
6. The power cell high voltage relay system of claim 1, wherein the positive high voltage relay low side drives a bi-directional transient diode.
7. The power cell high voltage relay system of claim 1, wherein the high side switch control circuit and the first low side switch control circuit collectively control the turning on or off of the positive high voltage relay.
8. The power battery high voltage relay system of claim 1, wherein the high side switch control circuit and the second low side switch control circuit together control the negative high voltage relay to turn on or off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122795519.1U CN216580206U (en) | 2021-11-15 | 2021-11-15 | Power battery high-voltage relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122795519.1U CN216580206U (en) | 2021-11-15 | 2021-11-15 | Power battery high-voltage relay system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216580206U true CN216580206U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122795519.1U Active CN216580206U (en) | 2021-11-15 | 2021-11-15 | Power battery high-voltage relay system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216580206U (en) |
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2021
- 2021-11-15 CN CN202122795519.1U patent/CN216580206U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee after: United New Energy Automobile Co.,Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee before: Hezhong New Energy Vehicle Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |