CN204136792U - A kind of checking system of high-voltage interlocking loop and hybrid vehicle - Google Patents
A kind of checking system of high-voltage interlocking loop and hybrid vehicle Download PDFInfo
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- CN204136792U CN204136792U CN201420495063.4U CN201420495063U CN204136792U CN 204136792 U CN204136792 U CN 204136792U CN 201420495063 U CN201420495063 U CN 201420495063U CN 204136792 U CN204136792 U CN 204136792U
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Abstract
The utility model provides a kind of checking system and hybrid vehicle of high-voltage interlocking loop, the checking system in described high-voltage interlocking loop, comprise: the entire car controller HCU be electrically connected with high-voltage interlocking line, the battery management system BMS be electrically connected with HCU and high-voltage interlocking line respectively; Wherein, in HCU, be provided with the first resistance and the second resistance, in BMS, be provided with the 3rd resistance, and the resistance value sum of the first resistance, the second resistance and the 3rd resistance is mated with the total resistance value of high-voltage interlocking line; One end ground connection of the first resistance, the other end is electrically connected with the first analogue to digital conversion A/D module of high-voltage interlocking line and HCU respectively; One end of second resistance is electrically connected with first direct supply of HCU, and the other end is electrically connected with high-voltage interlocking line and the first A/D module respectively.When adopting the checking system in above-mentioned high-voltage interlocking loop to detect high-voltage interlocking loop, significantly improve the accuracy of the state detecting high-voltage interlocking loop.
Description
Technical field
The utility model relates to hybrid vehicle control technology field, particularly a kind of checking system of high-voltage interlocking loop and hybrid vehicle.
Background technology
Along with the anxiety of Global Oil resource and the serious of problem of environmental pollution, and various countries are also more and more stricter to the standard of automotive emissions, and automobile manufacturing enterprise, in order to tackle above-mentioned situation, have developed the new-energy automobile of various energy-conserving and environment-protective.At present, the hybrid vehicle that a kind of new-energy automobile that technology is more ripe is is propulsion source with driving engine and motor, these two kinds of propulsions source work respectively under the motoring condition (as starting, low-medium speed, at a high speed, slowing down or brake) that automobile is different, or work simultaneously, the mode driven by this combination reduces oil consumption and exhaust emissions, thus reaches fuel-efficient and object that is environmental protection.
In above-mentioned hybrid vehicle, in order to improve motor-driven power, make the output voltage grade of used electrokinetic cell more and more higher, beyond the safety voltage level of human body, the high tension loop be so made up of the device such as battery and motor can form certain threat to personal safety.For this reason, usually in hybrid vehicle, high-voltage interlocking loop is provided with, utilize high-voltage interlocking loop can monitor high tension loop and whether exception occurs, and after discovery high tension loop is abnormal, the high-tension current that high pressure self-locking circuit cuts off battery automatically exports, to ensure that related personnel is not subject to high-tension current injury.
As from the foregoing, whether high-voltage interlocking loop normally works to the high voltage electric of guarantee hybrid vehicle is safely very crucial, and in existing technology, usually utilizes the switching value detecting high-voltage interlocking loop to judge whether high-voltage interlocking loop normally works.But, thisly judge that the accuracy whether high-voltage interlocking loop normally works is poor according to switching value, such as, when there is the situations such as aging, short circuit, open circuit and virtual connection when high-voltage interlocking loop, be difficult to judge that above-mentioned exception appears in high-voltage interlocking loop exactly according to switching value, namely accurately regular inspection can not measure the state in high-voltage interlocking loop, have a strong impact on the high voltage electric safety of hybrid vehicle.
Utility model content
In view of this, the utility model is intended to the checking system proposing a kind of high-voltage interlocking loop, to improve the accuracy of the state detecting high-voltage interlocking loop.
For achieving the above object, the technical solution of the utility model is achieved in that
The checking system in high-voltage interlocking loop, comprising: the entire car controller HCU be electrically connected with high-voltage interlocking line, the battery management system BMS be electrically connected with described HCU and described high-voltage interlocking line respectively; Wherein,
Be provided with the first resistance and the second resistance in described HCU, in described BMS, be provided with the 3rd resistance, and the resistance value sum of described first resistance, described second resistance and described 3rd resistance is mated with the total resistance value of described high-voltage interlocking line;
One end ground connection of described first resistance, the other end is electrically connected with the first analogue to digital conversion A/D module of described high-voltage interlocking line and described HCU respectively;
One end of described second resistance is electrically connected with first direct supply of described HCU, and the other end is electrically connected with described high-voltage interlocking line and described first A/D module respectively;
The two ends of described 3rd resistance are electrically connected with described high-voltage interlocking line respectively;
Described first resistance that the treater of described HCU detects according to described first A/D module is electrically connected the electromotive force at place with described first A/D module, and described second resistance is electrically connected the electromotive force at place with described first A/D module, calculate the electric potential difference obtained between described first resistance and described second resistance, according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, determine the state of described high-voltage interlocking line under this electric potential difference.
Preferably, between described second resistance and described first direct supply, be provided with the first electric capacity of voltage regulation, the first direct supply electrical connection described in described first electric capacity of voltage regulation one end, other end ground connection.
Preferably, described first direct supply exports constant potential, and the scope of described constant potential is 3V ~ 16V.
Further, also connected by controller local area network's CAN signal between described BMS and described HCU, the two ends of described 3rd resistance are also electrically connected with second A/D module of described BMS respectively; The electromotive force at the described 3rd resistance two ends that the treater of described BMS detects according to described second A/D module, calculate the electric potential difference obtained between described 3rd resistance two ends, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, determine the state of described high-voltage interlocking line under this electric potential difference, and feed back to the treater process of described HCU by described CAN.
The utility model additionally provides a kind of checking system of high-voltage interlocking loop simultaneously, comprising: the battery management system BMS be electrically connected with high-voltage interlocking line, the entire car controller HCU be electrically connected with described BMS and described high-voltage interlocking line respectively; Wherein
Be provided with the 4th resistance and the 5th resistance in described BMS, in described HCU, be provided with the 6th resistance, and the resistance value sum of described 4th resistance, described 5th resistance and described 6th resistance is mated with the total resistance value of described high-voltage interlocking line;
One end ground connection of described 4th resistance, the other end is electrically connected with the 2nd AD analog-to-digital conversion module of described high-voltage interlocking line and described BMS respectively;
Described one end of 5th resistance is electrically connected with second direct supply of described BMS, and the other end is electrically connected with described high-voltage interlocking line and described second A/D module respectively;
The two ends of described 6th resistance are electrically connected with described high-voltage interlocking line respectively;
Described 4th resistance that the treater of described BMS detects according to described second A/D module is electrically connected the electromotive force at place with described second A/D module, and described 5th resistance is electrically connected the electromotive force at place with described second A/D module, calculate the electric potential difference obtained between described 4th resistance and described 5th resistance, according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, determine the state of described high-voltage interlocking line under this electric potential difference.
Preferably, be provided with the second electric capacity of voltage regulation between described 5th resistance and described second direct supply, described second electric capacity of voltage regulation one end is electrically connected with described second direct supply, other end ground connection.
Preferably, described second direct supply exports constant potential, and the scope of described constant potential is 3V ~ 16V.
Further, also connected by controller local area network's CAN signal between described BMS and described HCU, the two ends of described 6th resistance are also electrically connected with first A/D module of described HCU respectively; The electromotive force at the described 6th resistance two ends that the treater of described HCU detects according to described first A/D module, calculate the electric potential difference between the two ends obtaining described 6th resistance, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, determine the state of described high-voltage interlocking line under this electric potential difference, and feed back to the treater process of described BMS by described CAN.
Relative to prior art, the checking system in high-voltage interlocking loop described in the utility model has following advantage:
In the checking system in high-voltage interlocking loop described in the utility model, the matched resistance of mating with the total resistance value of high-voltage interlocking line is provided with in entire car controller HCU and battery management system BMS, and the electromotive force at matched resistance two ends is obtained by analogue to digital conversion A/D module, the potential calculation at the matched resistance two ends that HCU and/or BMS detects according to A/D module obtains the electric potential difference at matched resistance two ends, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, determine the state of high-voltage interlocking line under this electric potential difference, namely the type whether high-voltage interlocking loop is abnormal and abnormal is judged.Therefore, compared with the state utilizing switching value high-voltage interlocking loop with prior art, when adopting the checking system in high-voltage interlocking loop described in the utility model to detect high-voltage interlocking loop, significantly improve the accuracy of the state detecting high-voltage interlocking loop.
Another object of the present utility model is to propose a kind of hybrid vehicle, to improve the high voltage electric safety of hybrid vehicle.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of hybrid vehicle, described hybrid vehicle is provided with the checking system in any one high-voltage interlocking loop that technique scheme is carried.
Relative to prior art, hybrid vehicle described in the utility model has following advantage: the checking system because of above-mentioned high-voltage interlocking loop can detect the state in high-voltage interlocking loop exactly, and perform corresponding safety control strategy according to the state in high-voltage interlocking loop, therefore, the high voltage electric safety of hybrid vehicle is significantly improved.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structured flowchart of the checking system in the high-voltage interlocking loop described in the utility model embodiment one;
Fig. 2 is the structured flowchart of the checking system in the high-voltage interlocking loop described in the utility model embodiment two.
Description of reference numerals:
10-high-voltage interlocking loop, 20-entire car controller,
21-first resistance, 22-first analog-to-digital conversion module,
23-second resistance, 24-first direct supply,
25-first electric capacity of voltage regulation, 26-the 6th resistance,
30-battery management system, 31-the 3rd resistance,
32-second analog-to-digital conversion module, 33-the 4th resistance,
34-the 5th resistance, 36-second electric capacity of voltage regulation,
40-CAN bus.
Detailed description of the invention
In order to improve the accuracy of the state detecting high-voltage interlocking loop and improve the high voltage electric safety of hybrid vehicle, the utility model embodiment provides a kind of checking system and hybrid vehicle of high-voltage interlocking loop, in the checking system in this high-voltage interlocking loop, by at entire car controller (Hybrid Vehicle Control Unit, hereinafter referred to as HCU) in the resistance that mates with the total resistance value of high-voltage interlocking line is set, and/or, at battery management system (Battery Management System, hereinafter referred to as BMS) in the resistance that mates with the total resistance value of high-voltage interlocking line is set, and the electromotive force at matched resistance two ends is obtained by analogue to digital conversion (hereinafter referred to as AD) module, the potential calculation at the matched resistance two ends that HCU and/or BMS detects according to A/D module obtains the electric potential difference at matched resistance two ends, according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line, just the state of high-voltage interlocking line can be judged exactly, and then the high voltage electric safety of hybrid vehicle can be improved by performing corresponding safety control strategy.
It should be noted that, high-voltage interlocking loop comprises high-voltage interlocking line, HCU and BMS, and therefore, the state of the high-voltage interlocking line detected exactly just can determine the state in high-voltage interlocking loop.
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Embodiment one
Refer to Fig. 1, the utility model embodiment one provides a kind of checking system of high-voltage interlocking loop, comprising: the HCU20 be electrically connected with high-voltage interlocking line 10, the BMS30 be electrically connected with HCU20 and high-voltage interlocking line 10 respectively; Wherein
Be provided with in HCU20 in the first resistance 21 and the second resistance 23, BMS30 and be provided with the 3rd resistance 31, and the resistance value sum of the first resistance 21, second resistance 23 and the 3rd resistance 31 is mated with the total resistance value of high-voltage interlocking line 10;
The resistance value sum being provided with the first resistance 21 and the second resistance 23, first resistance 21 and the second resistance 23 in HCU20 is mated with the total resistance value of high-voltage interlocking line 10;
One end ground connection of the first resistance 21, the other end is electrically connected with first A/D module 22 of high-voltage interlocking line 10 and HCU20 respectively;
One end of second resistance 23 is electrically connected with first direct supply 24 of HCU20, and the other end is electrically connected with high-voltage interlocking line 10 and the first A/D module 22 respectively;
The two ends of the 3rd resistance 31 are electrically connected with high-voltage interlocking line 10 respectively;
The first resistance 21 that the treater (not shown in FIG.) of HCU20 detects according to the first A/D module 22 is electrically connected the electromotive force at place with the first A/D module 22, and second resistance 23 be electrically connected the electromotive force at place with the first A/D module 22, calculate the electric potential difference between acquisition first resistance 21 and the second resistance 23, according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, determine the state of high-voltage interlocking line 10 under this electric potential difference.
Particularly, the first resistance 21 and the second resistance 23 is set in HCU20, wherein, one end ground connection of the first resistance 21, the other end of the first resistance 21 is electrically connected with the corresponding interface of high-voltage interlocking line 10 and the corresponding interface of the first A/D module 22 respectively; One end of second resistance 23 is connected with the first direct supply 24, and the other end of the second resistance 23 is electrically connected with the corresponding interface of high-voltage interlocking line 10 and the corresponding interface of the first A/D module 22 respectively; The 3rd resistance 31 that two ends are electrically connected with high-voltage interlocking line 10 is respectively provided with in BMS30.And, first resistance 21, second resistance 23 and the resistance value sum of the 3rd resistance 31 and the total resistance value of high-voltage interlocking line 10 match, namely the first resistance 21, second resistance 23 and the 3rd resistance 31 are equivalent to the equivalent resistance of all resistance in high-voltage interlocking line 10, therefore, the electromotive force of the first resistance 21 utilizing detection first A/D module 22 to detect and the electromotive force of the second resistance 23 are equivalent to the electromotive force at the two ends of all resistance in high-voltage interlocking line 10; The first resistance 21 that the treater of HCU20 detects according to the first A/D module 22 is electrically connected the electromotive force at place with the first A/D module 22 and the second resistance 23 is electrically connected the electromotive force at place with the first A/D module 22, calculate the electric potential difference between acquisition first resistance 21 and the second resistance 23, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, just the state of high-voltage interlocking line 10 can be determined, to perform corresponding safety control strategy.
According to the loaded current of the high tension loop of the device such as battery and motor composition, the total resistance value of high tension loop when can determine normally to work, then according to different faults type and caused respective change, determines concrete electric potential difference variation range.Different electric potential differences distinguish the concrete reference table 1 of state of corresponding high-voltage interlocking line 10:
| Electric potential difference | The state in high-voltage interlocking loop |
| Electric potential difference is within the first setting electric potential difference variation range | Normally |
| Electric potential difference is within the second setting electric potential difference variation range | Virtual connection |
| Electric potential difference is within the 3rd setting electric potential difference variation range | Aging |
| Electric potential difference is within the 4th setting electric potential difference variation range | Open circuit |
| Electric potential difference is within the 5th setting electric potential difference variation range | Short circuit |
Table 1
When charging to the battery in hybrid vehicle, or cross in journey at hybrid electric vehicle, the checking system in above-mentioned high-voltage interlocking loop by the first A/D module 22 Real-Time Monitoring first resistance 21 with the electromotive force at the first A/D module 22 place of electrical connection is, and second resistance 23 be electrically connected the electromotive force at place with the first A/D module 22, and by the electromotive force of the first measured resistance 21 and the ELECTROMOTIVE FORCE FEEDBACK AND LOAD FEED of the second resistance 23 to the treater of HCU20, the first resistance 21 that the treater of HCU20 detects according to the first A/D module 22 is electrically connected the electromotive force at place with the first A/D module 22 and the second resistance 23 is electrically connected the electromotive force at place with the first A/D module 22, calculate the electric potential difference between acquisition first resistance 21 and the second resistance 23.
When calculating acquisition electric potential difference and setting within electric potential difference variation range first, the treater determination high-voltage interlocking line 10 of HCU20 is in normal condition, the treater of HCU20 continues to perform current safety control policy, namely maintain the state of present hybrid automobile, namely do not change type of drive or the charging of hybrid vehicle.
When calculating acquisition electric potential difference and setting within electric potential difference variation range second, the treater determination high-voltage interlocking line 10 of HCU20 is in virtual connection state, and store this fault and maybe this fault is reported upper class controller, but now the treater of HCU20 continues to perform current safety control policy, do not perform lower electric program, maintain the state of present hybrid automobile.
When calculating acquisition electric potential difference and setting within electric potential difference variation range the 3rd, the treater determination high-voltage interlocking line 10 of HCU20 is in ageing state, and store this fault and maybe this fault is reported upper class controller, but now the treater of HCU20 continues to perform current safety control policy, do not perform lower electric program, maintain the state of present hybrid automobile.
When calculate obtain electric potential difference within the 4th setting electric potential difference variation range time, the treater determination high-voltage interlocking line 10 of HCU20 is in off state, and stores this fault and maybe this fault is reported upper class controller; But now the treater of HCU20 changes safety control strategy, if hybrid vehicle is just in motion, then the treater of HCU20 sends corresponding control command to corresponding control module, electric under making car load, and be switched to engine drive mode; If when charging to the battery in hybrid vehicle, then the treater of HCU20 sends corresponding control command to corresponding control module, electric under making car load.
When calculate obtain electric potential difference within the 5th setting electric potential difference variation range time, the treater determination high-voltage interlocking line 10 of HCU20 is in short-circuit condition, and stores this fault and maybe this fault is reported upper class controller; But now the treater of HCU20 changes safety control strategy, if hybrid vehicle is just in motion, then the treater of HCU20 sends corresponding control command to corresponding control module, electric under making car load, and be switched to engine drive mode; If when charging to the battery in hybrid vehicle, then the treater of HCU20 sends corresponding control command to corresponding control module, electric under making car load.
In sum, implement in the checking system in the high-voltage interlocking loop that provides at the utility model, the first resistance 21 that the treater of HCU20 detects according to the first A/D module 22 is electrically connected the electromotive force at place with the first A/D module 22 and the second resistance 23 is electrically connected the electromotive force at place with the first A/D module 22, calculate the electric potential difference between acquisition first resistance 21 and the second resistance 23, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, just the state of high-voltage interlocking line 10 can be determined exactly, namely the type whether high-voltage interlocking loop is abnormal and abnormal is judged, thus by performing corresponding safety control strategy.Therefore, compared with the state utilizing switching value high-voltage interlocking loop with prior art, when adopting the checking system in high-voltage interlocking loop described in the utility model to detect high-voltage interlocking line 10, significantly improve the accuracy of the state detecting high-voltage interlocking line 10.
In order to improve the accuracy of the state detecting high-voltage interlocking line 10 further, please continue to refer to Fig. 1, in a preferred embodiment, the first electric capacity of voltage regulation 25 is provided with between second resistance 23 and the first direct supply 24, first electric capacity of voltage regulation 25 one end first direct supply 24 is electrically connected, other end ground connection.Design like this, make the voltage of the first direct supply 24 output first through the first electric capacity of voltage regulation 25 voltage stabilizing, and then be supplied to the first resistance 21 and the second resistance 23, substantially reduce the fluctuation of voltage, thus improve the first resistance 21 that the first A/D module 22 detects and be electrically connected the electromotive force at place with the first A/D module 22 and the second resistance 23 is electrically connected the accuracy of the electromotive force at place with the first A/D module 22, and then improve the accuracy of the state detecting high-voltage interlocking line 10.
In order to improve the accuracy of the state detecting high-voltage interlocking line 10 further, preferably, the first direct supply 24 exports constant potential, and the scope of constant potential is 3V ~ 16V; Such as; first direct supply 24 exports the constant potential of 5V, so designs, by the duplicate protection of the first direct supply 24 and the first electric capacity of voltage regulation 25; further reduce the fluctuation of voltage, thus further increase the accuracy of the state detecting high-voltage interlocking line 10.
Please continue to refer to Fig. 1, in order to improve the accuracy of the state detecting high-voltage interlocking line 10 further, on the basis of above-described embodiment, also connected by controller local area network's CAN 40 signal between BMS30 and HCU20, the two ends of the 3rd resistance 31 are also electrically connected with second A/D module 32 of BMS30 respectively; Second A/D module 32 detects the electromotive force at the two ends of the 3rd resistance 31, and feed back to the treater (not shown in FIG.) of BMS30, the electromotive force at the 3rd resistance 31 two ends that the treater of BMS30 detects according to the second A/D module 32, calculate the electric potential difference between acquisition the 3rd resistance 31 two ends, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, determine the state of described high-voltage interlocking line 10 under this electric potential difference, and feed back to the treater process of HCU20 by CAN 40.
In the above-described embodiment, first A/D module 22 and the second A/D module 32 detect the electromotive force being electrically connected place with the resistance that high-voltage interlocking loop is mated with corresponding A/D module simultaneously, thus two electric potential differences can be obtained, make the treater of HCU20 can determine the state of high-voltage interlocking line 10 according to two electric potential differences, thus the accuracy of the state detecting high-voltage interlocking line 10 can be improved further.In addition, when causing because of reasons such as collisions HCU20 to occur abnormal, can be controlled to perform corresponding safety control strategy by BMS30, thus the reliability of the checking system in high-voltage interlocking loop can be improved.The mode of the state of the determination high-voltage interlocking line 10 of the treater of BMS30 is substantially identical with the mode of the state of the treater determination high-voltage interlocking line 10 of above-mentioned HCU20, therefore repeats no more.
In above-described embodiment one, the level of security of setting HCU20, higher than the level of security of BMS30, therefore, determines that the process of the state of high-voltage interlocking line 10 is performed by HCU20.But be not limited thereto, when level of security higher than HCU20 of the level of security of BMS30, determine that the process of the state of high-voltage interlocking line 10 is then performed by BMS30, illustrate and please refer to following embodiment two.
Embodiment two
Refer to Fig. 2, the utility model embodiment provides a kind of high-voltage interlocking circuit detecting system, comprising: the BMS30 be electrically connected with high-voltage interlocking line 10, the HCU20 be electrically connected with BMS30 and high-voltage interlocking line 10 respectively; Wherein
Be provided with in BMS30 in the 4th resistance 33 and the 5th resistance 34, HCU20 and be provided with the 6th resistance 26, and the resistance value sum of the 4th resistance 33, the 5th resistance 34 and the 6th resistance 26 is mated with the total resistance value of high-voltage interlocking line 10;
One end ground connection of the 4th resistance 33, the other end is electrically connected with second A/D module 32 of high-voltage interlocking line 10 and BMS30 respectively;
One end of 5th resistance 34 is electrically connected with second direct supply 35 of BMS30, and the other end is electrically connected with high-voltage interlocking line 10 and the second A/D module 32 respectively;
The two ends of the 6th resistance 26 are electrically connected with high-voltage interlocking line 10 respectively;
The 4th resistance 33 that the treater of BMS detects according to the second A/D module 32 is electrically connected the electromotive force at place with the second A/D module 32 and the 5th resistance 34 is electrically connected the electromotive force at place with the second A/D module 32, calculate the electric potential difference between acquisition the 4th resistance 33 and the 5th resistance 34, according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, determine the whether abnormal of high-voltage interlocking line 10.
Because of embodiment two detection, calculate and the process of the process determined and above-described embodiment one basically identical, the technique effect reached is also identical, is therefore not described in detail.
Equally, in order to improve the accuracy of the state detecting high-voltage interlocking line 10 further, please continue to refer to Fig. 2, preferably, be provided with second electric capacity of voltage regulation 36, second electric capacity of voltage regulation 36 one end between 5th resistance 34 and the second direct supply 35 to be electrically connected with the second direct supply 35, other end ground connection.Design like this, make the voltage of the second direct supply 35 output first through the second electric capacity of voltage regulation 36 voltage stabilizing, and then be supplied to the 4th resistance 33 and the 5th resistance 34, substantially reduce the fluctuation of voltage, thus improve the 4th resistance 33 that the second A/D module 32 detects and be electrically connected the electromotive force at place with the second A/D module 32 and the 5th resistance 34 is electrically connected the accuracy of the electromotive force at place with the second A/D module 32, and then improve the accuracy of the state detecting high-voltage interlocking line 10.
Preferably, the second direct supply 35 exports constant potential, and the scope of constant potential is 3V ~ 16V; Such as; second direct supply 35 exports the constant potential of 5V, so designs, by the duplicate protection of the second direct supply 35 and the second electric capacity of voltage regulation 36; further reduce the fluctuation of voltage, thus further increase the accuracy of the state detecting high-voltage interlocking line 10.
Please continue to refer to Fig. 2, in order to improve accuracy and the reliability of the state detecting high-voltage interlocking line 10 further, on the basis of above-mentioned embodiment, also connected by controller local area network's CAN 40 signal between BMS30 and HCU20, the two ends of the 6th resistance 26 are also electrically connected with first A/D module 22 of HCU20 respectively; First A/D module 22 detects the electromotive force at the two ends of the 6th resistance 26, the electromotive force at the 6th resistance 26 two ends that the treater of HCU20 detects according to the first A/D module 22, electric potential difference between the two ends of calculating acquisition the 6th resistance 26, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding high-voltage interlocking line 10, determine the state of high-voltage interlocking line 10 under this electric potential difference, and feed back to the treater process of BMS30 by CAN 40.
The utility model embodiment still provides a kind of hybrid vehicle, is provided with the checking system in the high-voltage interlocking loop that above-described embodiment is carried in this hybrid vehicle.Checking system because of above-mentioned high-voltage interlocking loop can detect the state of high-voltage interlocking line exactly, and performs corresponding safety control strategy according to the state of high-voltage interlocking line, thus improves the high voltage electric safety of hybrid vehicle.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. the checking system in a high-voltage interlocking loop, it is characterized in that, comprise: the entire car controller HCU (20) be electrically connected with high-voltage interlocking line (10), the battery management system BMS (30) be electrically connected with described HCU (20) and described high-voltage interlocking line (10) respectively; Wherein,
The first resistance (21) and the second resistance (23) is provided with in described HCU (20), be provided with the 3rd resistance (31) in described BMS (30), and the resistance value sum of described first resistance (21), described second resistance (23) and described 3rd resistance (31) is mated with the total resistance value of described high-voltage interlocking line (10);
One end ground connection of described first resistance (21), the other end is electrically connected with the first analogue to digital conversion A/D module (22) of described high-voltage interlocking line (10) and described HCU (20) respectively;
One end of described second resistance (23) is electrically connected with first direct supply (24) of described HCU (20), and the other end is electrically connected with described high-voltage interlocking line (10) and described first A/D module (22) respectively;
The two ends of described 3rd resistance (31) are electrically connected with described high-voltage interlocking line (10) respectively;
Described first resistance (21) that the treater of described HCU (20) detects according to described first A/D module (22) is electrically connected the electromotive force at place with described first A/D module (22), and described second resistance (23) is electrically connected the electromotive force at place with described first A/D module (22), calculate the electric potential difference obtained between described first resistance (21) and described second resistance (23), according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line (10), determine the state of described high-voltage interlocking line (10) under this electric potential difference.
2. the checking system in high-voltage interlocking loop according to claim 1, it is characterized in that, the first electric capacity of voltage regulation (25) is provided with between described second resistance (23) and described first direct supply (24), first direct supply (24) electrical connection described in described first electric capacity of voltage regulation (25) one end, other end ground connection.
3. the checking system in high-voltage interlocking loop according to claim 2, is characterized in that, described first direct supply (24) exports constant potential, and the scope of described constant potential is 3V ~ 16V.
4. the checking system in high-voltage interlocking loop according to claim 1, it is characterized in that, also connected by controller local area network's CAN (40) signal between described BMS (30) and described HCU (20), the two ends of described 3rd resistance (31) are also electrically connected with second A/D module (32) of described BMS (30) respectively; The electromotive force at described 3rd resistance (31) two ends that the treater of described BMS (30) detects according to described second A/D module (32), calculate the electric potential difference obtained between described 3rd resistance (31) two ends, and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line (10), determine the state of described high-voltage interlocking line (10) under this electric potential difference, and feed back to the treater process of described HCU (20) by described CAN (40).
5. the checking system in a high-voltage interlocking loop, it is characterized in that, comprise: the battery management system BMS (30) be electrically connected with high-voltage interlocking line (10), the entire car controller HCU (20) be electrically connected with described BMS (30) and described high-voltage interlocking line (10) respectively; Wherein
The 4th resistance (33) and the 5th resistance (34) is provided with in described BMS (30), be provided with the 6th resistance (26) in described HCU (20), and the resistance value sum of described 4th resistance (33), described 5th resistance (34) and described 6th resistance (26) is mated with the total resistance value of described high-voltage interlocking line (10);
One end ground connection of described 4th resistance (33), the other end is electrically connected with the 2nd AD analog-to-digital conversion module (32) of described high-voltage interlocking line (10) and described BMS (30) respectively;
Described one end of 5th resistance (34) is electrically connected with second direct supply (35) of described BMS (30), and the other end is electrically connected with described high-voltage interlocking line (10) and described second A/D module (32) respectively;
The two ends of described 6th resistance (26) are electrically connected with described high-voltage interlocking line (10) respectively;
Described 4th resistance (33) that the treater of described BMS (30) detects according to described second A/D module (32) is electrically connected the electromotive force at place with described second A/D module (32), and described 5th resistance (34) is electrically connected the electromotive force at place with described second A/D module (32), calculate the electric potential difference obtained between described 4th resistance (33) and described 5th resistance (34), according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line (10), determine the state of described high-voltage interlocking line (10) under this electric potential difference.
6. the checking system in high-voltage interlocking loop according to claim 5, it is characterized in that, the second electric capacity of voltage regulation (36) is provided with between described 5th resistance (34) and described second direct supply (35), described second electric capacity of voltage regulation (36) one end is electrically connected with described second direct supply (35), other end ground connection.
7. the checking system in high-voltage interlocking loop according to claim 6, is characterized in that, described second direct supply (35) exports constant potential, and the scope of described constant potential is 3V ~ 16V.
8. according to the checking system in the arbitrary described high-voltage interlocking loop of claim 5-7, it is characterized in that, also connected by controller local area network's CAN (40) signal between described BMS (30) and described HCU (20), the two ends of described 6th resistance (26) are also electrically connected with first A/D module (22) of described HCU (20) respectively; The electromotive force at described 6th resistance (26) two ends that the treater of described HCU (20) detects according to described first A/D module (22), calculate the electric potential difference between the two ends obtaining described 6th resistance (26), and according to this electric potential difference and default different electric potential difference distinguish the state of corresponding described high-voltage interlocking line (10), determine the state of described high-voltage interlocking line (10) under this electric potential difference, and feed back to the treater process of described BMS (30) by described CAN (40).
9. a hybrid vehicle, is characterized in that, described hybrid vehicle be provided with as arbitrary in claim 1-8 as described in the checking system in high-voltage interlocking loop.
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| CN108519549A (en) * | 2018-03-21 | 2018-09-11 | 宝沃汽车（中国）有限公司 | Method for diagnosing faults, device, keyless entry and starter, vehicle |
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| CN109693544B (en) * | 2019-01-13 | 2023-12-08 | 无锡商业职业技术学院 | High-voltage interlocking loop of electric automobile |
| CN112977068A (en) * | 2021-03-18 | 2021-06-18 | 奇瑞新能源汽车股份有限公司 | High-voltage protection method and device for electric automobile and electric automobile |
| WO2024031661A1 (en) * | 2022-08-12 | 2024-02-15 | 厦门新能达科技有限公司 | Battery management system, battery pack, and electric device |
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