CN105553011A - High-voltage relay interlock circuit of battery management system - Google Patents
High-voltage relay interlock circuit of battery management system Download PDFInfo
- Publication number
- CN105553011A CN105553011A CN201511010540.9A CN201511010540A CN105553011A CN 105553011 A CN105553011 A CN 105553011A CN 201511010540 A CN201511010540 A CN 201511010540A CN 105553011 A CN105553011 A CN 105553011A
- Authority
- CN
- China
- Prior art keywords
- relay
- resistance
- voltage
- branch road
- potential drop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
Abstract
The invention discloses a high-voltage relay interlock circuit of a battery management system. The high-voltage relay interlock circuit comprises a battery pack, a general positive relay, a general negative relay, a charging relay, a digital logic device, a first voltage dividing branch, a second voltage dividing branch and a relay drive unit. One end of the charging relay is connected with a general positive end of the battery pack, and the other end of the charging relay is in serial connection with the first voltage dividing branch and then is connected with one end of the general negative relay. One end of the general positive relay is connected with a general positive end of the battery pack, and the other end of the general positive relay is in serial connection with the second voltage dividing branch and then is connected with one end of the general negative relay. The other end of the general negative relay is connected with a general negative end of the battery pack. According to the interlock circuit, safety of operators is ensured, emergent faults can be processed more timely, potential safety hazard resulting from the fact that abnormal high voltage of the battery management system cannot be cut off is prevented, and with-load cutting of the battery system is prevented from damaging a high-voltage relay of the battery system and electric parts.
Description
Technical field
The present invention relates to the technical field of electric automobile, more particularly, relate to a kind of high-voltage relay interlock circuit of battery management system.
Background technology
Electric automobile power battery group is made up of string lithium ion cell up to a hundred, when charging, under normal circumstances: closed charge relay, disconnects total positive relay.If when charging, total positive relay closes, this time has just broken down.In the interlock circuit of prior art, internal battery pack connects service switch, this service switch has two interlocking contacts, these two interlocking contact all with battery management system (BatteryManagementSystem, BMS) connect, by the electrical interlocks state of BMS Monitoring and maintenance switch, BMS and entire car controller (VehicleControlUnit, VCU) communicate, Control mouth positive and negative electrode terminal connects BMS and VCU respectively, VCU can transmit control signal to relay, the operating state of control relay.The current-carrying positive and negative electrode terminal of this relay is serially connected in the high tension loop formed by battery pack and high-voltage load.But, the process required time that above-mentioned control relay disconnects is also longer, and when very easily causing relay also not disconnect, service switch high pressure coupling part first disconnects, and namely band also occurs and carries situation about cutting off, in this case can produce phenomenon of arc discharge, cause safety problem.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of high-voltage relay interlock circuit of battery management system is provided.
For achieving the above object, technical scheme provided by the invention is as follows:
The invention provides a kind of high-voltage relay interlock circuit of battery management system, comprise battery pack, total positive relay, always negative relay, charge relay, digital logic device, multiple divider resistance and voltage-stabiliser tube; Described total positive relay is connected total anode of battery pack with charge relay, total negative relay connects total negative terminal of battery pack, and divider resistance R1, R2 connect, one end access charge relay of R1, and divider resistance R3, R4 connect, the total positive relay of R3 access; Described voltage-stabiliser tube is connected on R2, R4 two ends respectively; Described digital logic device connects one end of R2, R4 resistance respectively.
As preferred technical scheme, described battery pack is connected in series by multiple cell.
As preferred technical scheme, also comprise relay drive circuit, described relay drive circuit one end is connected with total positive relay and charge relay, and the other end is connected with digital logic device.
As preferred technical scheme, described divider resistance is four, and described voltage-stabiliser tube is two, and divider resistance R1 and R2 connects, and divider resistance R3 and R4 connects; The resistance of R1 is greater than the resistance of R2, and the resistance of R3 is greater than the resistance of R4, makes R2, R4 obtain the voltage of about 4V by electric resistance partial pressure.
As preferred technical scheme, described divider resistance is high-power aluminum hull divider resistance.
As preferred technical scheme, between described total positive relay and total negative relay, be connected with load.
As preferred technical scheme, between described charge relay and total negative relay, be connected with charger.
As preferred technical scheme, described total positive relay is the special relay of new-energy automobile.
As preferred technical scheme, described total negative relay is the special relay of new-energy automobile.
Compared with prior art, beneficial effect of the present invention is:
1, interlock circuit of the present invention ensure that the safety of operating personnel, the promptness improving emergency process and the potential safety hazard avoiding battery management system abnormal pressure and cannot cut off, the band that it also avoid battery system carries the damage cut off battery system high-voltage relay and consuming parts.
2, circuit structure of the present invention is simple, easily realizes, is applicable to large-scale industrial production.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the high-voltage relay interlock circuit of the battery management system that the embodiment of the present invention provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Embodiments of the invention one provide a kind of high-voltage relay interlock circuit of battery management system, Fig. 1 is the circuit theory diagrams of the embodiment of the present invention one, please refer to Fig. 1, the circuit of the embodiment of the present invention comprises battery pack, total positive relay, always negative relay, charge relay, digital logic device, the first dividing potential drop branch road, the second dividing potential drop branch road and relay drive unit, one end of described charge relay is connected with total anode of battery pack, and the other end is connected and connect one end of total negative relay after the first dividing potential drop branch road; Described total positive one end of relay is connected with total anode of battery pack, and the other end is connected after the second dividing potential drop branch road and connect the one end always bearing relay; Total negative terminal of another termination battery pack of described total negative relay; The voltage sample point of described first dividing potential drop branch road and the second dividing potential drop branch road is connected with the first input end of digital logic device, the second input respectively; The output of digital logic device is connected with the input of relay drive unit; First output of described relay drive unit is connected with total positive Control end, second output is connected with charge relay control end, when by the first dividing potential drop branch road and the second dividing potential drop branch road, digital logic device detects that charge relay and total positive relay all close, digital logic device exports corresponding control signal to relay drive unit, and relay drive unit disconnects total positive relay and/or charge relay.
Described first dividing potential drop branch road comprises resistance R1, resistance R2, one end of resistance R1 is connected with charge relay, be connected with total negative relay after other end series resistance R2, the node that resistance R1 is connected with resistance R2 is connected with the first input end of digital logic device as the voltage sample point of the first dividing potential drop branch road.
Described second dividing potential drop branch road comprises resistance R3, resistance R4, one end of resistance R3 is connected with total positive relay, be connected with total negative relay after other end series resistance R4, the node that resistance R3 is connected with resistance R4 is connected with the second input of digital logic device as the voltage sample point of the second dividing potential drop branch road.
Embodiment two
Embodiments of the invention two provide a kind of high-voltage relay interlock circuit of battery management system, are the improvement carried out on the basis of embodiment one.The interlock circuit of the present embodiment and the difference of embodiment one are as follows:
Described relay drive unit can select corresponding logical device according to actual needs, if when digital logic device adopts with gate logic device, the logic of relay drive unit can be: when being input as logical one, the logic of the first output and the second output is respectively 1 and 1, and now relay drive unit disconnects total positive relay and charge relay; Or first the logic of output and the second output be respectively 1 and 0 (or 0 and 1), now relay drive unit disconnect total positive relay, charge relay one of them.If during digital logic device employing NAND gate logical device, the logic of relay drive unit can be: when being input as logical zero, the logic of the first output and the second output is respectively 1 and 1, and now relay drive unit disconnects total positive relay and charge relay; Or first the logic of output and the second output be respectively 1 and 0 (or 0 and 1), now relay drive unit disconnect total positive relay, charge relay one of them.Described relay drive unit adopts L298 series driving chip or BTS79 series driving chip.
Described first dividing potential drop branch road also comprises the first voltage regulation unit be connected in parallel with resistance R2, described first dividing potential drop branch road also comprises the first filter unit be connected in parallel with resistance R2, in the present embodiment, the voltage stabilizing value of described first voltage regulation unit is 5V, and the voltage-stabiliser tube that voltage stabilizing value is selected by voltage regulation unit determines.
Described second dividing potential drop branch road also comprises the second voltage regulation unit be connected in parallel with resistance R4, described second dividing potential drop branch road also comprises the second filter unit be connected in parallel with resistance R4, in the present embodiment, the voltage stabilizing value of described second voltage regulation unit is 5V, and the voltage-stabiliser tube that voltage stabilizing value is selected by voltage regulation unit determines.
In the present embodiment, described digital logic device is and gate logic device inclusive NAND gate logic device.
In the present embodiment, described battery pack is connected in series by multiple cell, can certainly to be combined composition battery pack, can arrange according to the actual needs by battery pack series, parallel.
In the present embodiment, also comprise relay drive circuit, described relay drive circuit one end is connected with total positive relay and charge relay, and the other end is connected with digital logic device.
As shown in Figure 1, described divider resistance is four, and described voltage-stabiliser tube is two, and divider resistance R1 and R2 connects, and divider resistance R3 and R4 connects; The resistance of R1 is greater than the resistance of R2, and the resistance of R3 is greater than the resistance of R4, makes R2, R4 obtain the voltage of about 4.V by electric resistance partial pressure.
Described divider resistance is high-power aluminum hull divider resistance, and aluminum hull divider resistance low price, be conducive to cost-saving, and dividing potential drop is effective, selects the divider resistance of other types to be equally applicable to the present invention.
Be connected with load between described total positive relay and total negative relay, be connected with load between described total positive relay and total negative relay, optimize function of the present invention further.
Be connected with charger between described charge relay and total negative relay, described charger is used for charging to it when down circuitry, ensures the normal operation of circuit.
In the present embodiment, described total positive relay is the special relay of new-energy automobile, and described total negative relay is the special relay of new-energy automobile; It is high power relay, and do not limit the type of total positive relay and total negative relay in certain the present invention, the relay that can reach above-mentioned functions all can be selected.By such scheme, when the total positive relay of realization and charge relay close simultaneously, cut off total just relay or charge relay, realize interlocking.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. the high-voltage relay interlock circuit of a battery management system, it is characterized in that, comprise battery pack, total positive relay, always negative relay, charge relay, digital logic device, the first dividing potential drop branch road, the second dividing potential drop branch road and relay drive unit, one end of described charge relay is connected with total anode of battery pack, and the other end is connected and connect one end of total negative relay after the first dividing potential drop branch road; Described total positive one end of relay is connected with total anode of battery pack, and the other end is connected after the second dividing potential drop branch road and connect the one end always bearing relay; Total negative terminal of another termination battery pack of described total negative relay; The voltage sample point of described first dividing potential drop branch road and the second dividing potential drop branch road is connected with the first input end of digital logic device, the second input respectively; The output of digital logic device is connected with the input of relay drive unit; First output of described relay drive unit is connected with total positive Control end, second output is connected with charge relay control end, when by the first dividing potential drop branch road and the second dividing potential drop branch road, digital logic device detects that charge relay and total positive relay all close, digital logic device exports corresponding control signal to relay drive unit, and relay drive unit disconnects total positive relay and/or charge relay.
2. the high-voltage relay interlock circuit of battery management system according to claim 1, it is characterized in that, described first dividing potential drop branch road comprises resistance R1, resistance R2, one end of resistance R1 is connected with charge relay, be connected with total negative relay after other end series resistance R2, the node that resistance R1 is connected with resistance R2 is connected with the first input end of digital logic device as the voltage sample point of the first dividing potential drop branch road.
3. the high-voltage relay interlock circuit of battery management system according to claim 2, is characterized in that, described first dividing potential drop branch road also comprises the first voltage regulation unit be connected in parallel with resistance R2.
4. the high-voltage relay interlock circuit of battery management system according to claim 3, is characterized in that, described first dividing potential drop branch road also comprises the first filter unit be connected in parallel with resistance R2.
5. the high-voltage relay interlock circuit of battery management system according to claim 1, it is characterized in that, described second dividing potential drop branch road comprises resistance R3, resistance R4, one end of resistance R3 is connected with total positive relay, be connected with total negative relay after other end series resistance R4, the node that resistance R3 is connected with resistance R4 is connected with the second input of digital logic device as the voltage sample point of the second dividing potential drop branch road.
6. the high-voltage relay interlock circuit of battery management system according to claim 5, is characterized in that, described second dividing potential drop branch road also comprises the second voltage regulation unit be connected in parallel with resistance R4.
7. the high-voltage relay interlock circuit of battery management system according to claim 6, is characterized in that, described second dividing potential drop branch road also comprises the second filter unit be connected in parallel with resistance R4.
8. the high-voltage relay interlock circuit of battery management system according to claim 1, is characterized in that, described digital logic device is and gate logic device inclusive NAND gate logic device.
9. the high-voltage relay interlock circuit of the battery management system according to any one of claim 1-8, is characterized in that, is connected with load between described total positive relay and total negative relay.
10. the high-voltage relay interlock circuit of the battery management system according to any one of claim 1-8, is characterized in that, is connected with charger between described charge relay and total negative relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010540.9A CN105553011A (en) | 2015-12-26 | 2015-12-26 | High-voltage relay interlock circuit of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010540.9A CN105553011A (en) | 2015-12-26 | 2015-12-26 | High-voltage relay interlock circuit of battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105553011A true CN105553011A (en) | 2016-05-04 |
Family
ID=55832022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511010540.9A Pending CN105553011A (en) | 2015-12-26 | 2015-12-26 | High-voltage relay interlock circuit of battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105553011A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599384A (en) * | 2018-04-19 | 2018-09-28 | 宁德时代新能源科技股份有限公司 | Energy storage multi-cabinet management method, device and system |
| CN108649659A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | A kind of battery charging intelligent rotation circuit |
-
2015
- 2015-12-26 CN CN201511010540.9A patent/CN105553011A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599384A (en) * | 2018-04-19 | 2018-09-28 | 宁德时代新能源科技股份有限公司 | Energy storage multi-cabinet management method, device and system |
| CN108649659A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | A kind of battery charging intelligent rotation circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108336780B (en) | Control method and system for gradient utilization of battery pack | |
| CN106849288B (en) | Battery module connecting circuit and energy storage device | |
| CN102624050A (en) | Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack | |
| CN204046213U (en) | A kind of discharge and recharge is with mouth control circuit | |
| CN102983556B (en) | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection | |
| CN107895982A (en) | Charging/discharging apparatus, method and device | |
| CN110293876B (en) | On-line cutting-off/replacing circuit for fault battery/battery module of battery pack | |
| CN113078714A (en) | Energy storage system and energy storage system control method | |
| CN110690752B (en) | BMS management method for multi-battery pack parallel control | |
| CN108462214A (en) | A kind of double cell control method for parallel with software realization | |
| CN202405763U (en) | Over-discharge protection circuit and battery utilizing same | |
| CN105553011A (en) | High-voltage relay interlock circuit of battery management system | |
| CN103413980A (en) | Intelligent hybrid battery management system | |
| CN109450047B (en) | Series energy density battery pack circulating charge-discharge circuit and control method | |
| JP2016165192A (en) | Overvoltage protection circuit | |
| CN202535104U (en) | Battery management system capable of automatically cutting off failure units in series-connected battery pack | |
| CN105514513A (en) | Power battery charging and discharging control method and system | |
| CN203932250U (en) | A kind of battery structure based on distributed control electrokinetic cell | |
| CN112379285B (en) | Battery pack self-discharge screening method | |
| CN2922234Y (en) | Over-discharge protecting circuit for power lithium ion cell | |
| EP2812942B1 (en) | Power battery pack and power battery system | |
| CN215451508U (en) | Battery pack capable of keeping running after automatic disconnection of partial fault battery units | |
| CN205283198U (en) | Battery management system's high voltage relay interlock circuit | |
| CN201515252U (en) | Balance charger | |
| CN2922233Y (en) | Over-charging protecting circuit for power lithium ion cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160504 |
|
| RJ01 | Rejection of invention patent application after publication |