CN204741299U - A group battery auto -change over device for electric motor car - Google Patents
A group battery auto -change over device for electric motor car Download PDFInfo
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- CN204741299U CN204741299U CN201520383285.1U CN201520383285U CN204741299U CN 204741299 U CN204741299 U CN 204741299U CN 201520383285 U CN201520383285 U CN 201520383285U CN 204741299 U CN204741299 U CN 204741299U
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- battery pack
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- power bus
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Abstract
The utility model discloses a group battery auto -change over device for electric motor car, including DCDC power module, microcontroller module and switch module, the DCDC power module group battery carries out voltage conversion in order to obtain the required operating voltage of microcontroller module as the input power, microcontroller module output control command, the switch module includes a plurality of switch elements, the positive pole of group battery is connected through a plurality of switch elements and the anodal of power bus respectively, the negative pole of group battery is connected to the negative pole of power bus, the disconnection inserts the power bus with the group battery by corresponding to current closed switch element according to control command in the switch element, arbitrary switch element beyond current closed switch element postpones to preset the time closure in order to insert the power bus with corresponding group battery according to control command. Compared with the prior art, the utility model discloses the problem that the microcontroller module can't be worked and messenger's electric motor car can't start when power bus mistake electricity had just been solved to generate current circulation between the group battery has been avoided.
Description
Technical field
The utility model relates to technical field of battery management, relates to a kind of battery pack switching device shifter for electric motor car more specifically.
Background technology
At present, existing electric motor car is in order to increase flying power on the market, often uses multiple battery pack to power in turn, when the battery electric quantity of current use is not enough, the battery pack switching to another group electricity abundance is charged, and the battery pack of replacing is taken off from electric motor car and charged.But above-mentioned power supply process in turn is artificially interfered more, need to switch battery pack manually, when causing changing battery pack, automaticity is lower, and reduce the stability of system, battery pack is longer for switching time; In addition, when battery pack switches, there is certain potential safety hazard in the complete dead electricity of electric vehicle system.
Battery pack of the prior art electric supply installation is in turn illustrated below with reference to Fig. 1, as shown in Figure 1, battery pack PACK1 and PACK2 is also connected on power bus, battery pack PACK1 is such as first used to power to power bus, when battery pack PACK1 electricity is not enough, field effect transistor Q1 closes, field effect transistor Q2 unlatching simultaneously, realize the object of battery pack PACK2 access power bus, and then battery pack PACK1 taken off charge separately, wherein the control of field effect transistor Q1, Q2 completes by communication bus is program control.Battery pack shown in Fig. 1 in turn electric supply installation there are the following problems: (1) sends switching command by communication bus and controls field effect transistor Q1, the unlatching of Q2 and closing motion, may because communication time delay causes the action of field effect transistor Q1 and Q2 inconsistent, if field effect transistor Q2 opens when field effect transistor Q1 does not also close in time, battery pack PACK1 and the PACK2 that two voltage then can be caused different is access on same power bus, carry out the electric current circulation between formation two battery pack, if electric current comparatively senior general burns discharge loop, electric motor car is caused to damage; (2) on the electric motor car of electric motor car Master Control Unit from power bus power taking, longer to the interval time that field effect transistor Q2 opens after if field effect transistor Q1 closes, then there is dead electricity situation in power bus, electric motor car Master Control Unit will be caused to quit work, thus cannot Communication Control be carried out, field effect transistor Q2 cannot be unlocked, and then causes electric motor car normally to start.It should be noted that, when the battery pack having more than 3 and 3 in electric motor car switches, its switching principle is identical with the switching principle of above-mentioned 2 Battery pack groups.
Therefore, a kind of battery pack switching device shifter for electric motor car is badly in need of to overcome above-mentioned defect.
Utility model content
The purpose of this utility model is to provide a kind of battery pack switching device shifter for electric motor car, with avoid occurring two battery pack simultaneously access power bus and power bus dead electricity time micro controller module cannot work and cause the problem that electric motor car cannot start, thus realize safety, switch the battery pack of access power bus fast.
For achieving the above object, the utility model provides a kind of battery pack switching device shifter for electric motor car, comprising:
DC/DC power module, is connected with the positive pole of multiple battery pack, for described battery pack is carried out voltage transitions with the operating voltage obtained needed for micro controller module and then power for described micro controller module as input power;
Micro controller module, for exporting control command to switch module; And
Switch module, described switch module comprises and described battery pack multiple switch element one to one, the positive pole of multiple described battery pack is connected with the positive pole of power bus respectively by multiple described switch element, the negative pole of multiple described battery pack is connected to the negative pole of described power bus jointly, in multiple described switch element, current closed described switch element disconnects according to described control command and accesses described power bus to end corresponding described battery pack, arbitrary described switch element in multiple described switch element beyond current closed described switch element postpones Preset Time according to described control command and closes so that corresponding described battery pack is accessed described power bus.
Compared with prior art, the battery pack switching device shifter that the utility model is used for electric motor car comprises DC/DC power module, micro controller module and switch module, wherein micro controller module exports control command to switch module, switch module disconnects the current battery pack of access power bus and the connection of power bus according to control command, and by a certain battery pack access power bus in all the other battery pack after delay Preset Time, thus avoid the problem of access power bus while of there are two battery pack, and then avoid generation current circulation between two battery pack, improve the fail safe of battery pack handoff procedure, in addition, micro controller module is powered by DC/DC power module, instead of from power taking power bus, thus avoid when power bus dead electricity, micro controller module cannot work and cause the problem that electric motor car cannot start.
Preferably,
By following description also by reference to the accompanying drawings, the utility model will become more clear, and these accompanying drawings are for explaining embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of battery pack electric supply installation in turn in prior art.
Fig. 2 is the structured flowchart of the utility model for battery pack switching device shifter one embodiment of electric motor car.
Fig. 3 is the circuit diagram for battery pack switching device shifter one embodiment of electric motor car in Fig. 2.
Fig. 4 is the circuit diagram of the utility model for external key-press module in battery pack switching device shifter one embodiment of electric motor car.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, element numbers similar in accompanying drawing represents similar element.The utility model is used for the battery pack switching device shifter 100 of electric motor car for the battery pack of the access power bus that automatically switches, and wherein battery pack has multiple, as 2,3,4 etc.
Please refer to Fig. 2, the battery pack switching device shifter 100 that the utility model is used for electric motor car comprises DC/DC power module 12, micro controller module 13 and switch module 14, wherein DC/DC power module 12 is connected with the positive pole of multiple battery pack, for battery pack is carried out voltage transitions with the operating voltage obtained needed for micro controller module 13 and then power for micro controller module 13 as input power, micro controller module 13 is for exporting control command to switch module 14, switch module 14 comprises and battery pack multiple switch element 141 one to one, the positive pole of multiple battery pack is connected with the positive pole of power bus respectively by multiple switch element 141, the negative pole of multiple battery pack is connected to the negative pole of power bus jointly, in multiple switch element 141, current closed switch element 141 disconnects according to control command to end corresponding battery pack access power bus, it is closed with by corresponding battery pack access power bus that arbitrary switch element 141 in multiple switch element 141 beyond current closed switch element 141 postpones Preset Time according to control command.
Compared with prior art, the battery pack switching device shifter 100 breaker in middle module 14 that the utility model is used for electric motor car disconnects the current battery pack of access power bus and the connection of power bus according to control command, and by a certain battery pack access power bus in all the other battery pack after delay Preset Time, thus avoid the problem of access power bus while of there are two battery pack, and then avoid generation current circulation between two battery pack, improve the fail safe of battery pack handoff procedure, in addition, micro controller module 13 is powered by DC/DC power module 11, instead of from power taking power bus, thus avoid when power bus dead electricity, micro controller module cannot work and cause the problem that electric motor car cannot start.
Concrete, as shown in Figure 3, DC/DC power module 12 comprises voltage conversion unit 121 and the multiple isolated locations 123 corresponding to battery pack, the positive pole of battery pack is connected with the input of voltage conversion unit 121 respectively by corresponding isolated location 123, and isolated location 123 forms circulation for preventing between multiple battery pack.As: isolated location 123 is diode, and the positive pole of diode is connected with the positive pole of corresponding battery pack, and the negative pole of diode is connected with the input of voltage conversion unit 121.Micro controller module 13 comprises microcontroller U0, and in the present embodiment, the model of microcontroller U0 is STM8L052C6T6.Preferably, switch module 14 is relay switch array, and switch element 141 is relay switch unit.
Below in conjunction with Fig. 3, the specific implementation circuit of the utility model for battery pack switching device shifter 100 1 embodiment of electric motor car is described, wherein embodiment illustrated in fig. 3 is be 3 for the quantity of battery pack to be described, certainly, the quantity of battery pack is not restricted to 3.Wherein, in Fig. 3, battery pack interface J1, J2 and J3 are respectively used to access battery pack PACK1, PACK2 and PACK3, and power stage interface PACK OUT is connected with power bus.
As shown in Figure 3, DC/DC power module 12, micro controller module 13 and switch module 14 is comprised for the battery pack switching device shifter 100 of electric motor car in the present embodiment, wherein DC/DC power module 12 comprises voltage conversion unit 121 and corresponding to battery pack 3 isolated locations 123, switch module 14 comprises 3 switch elements, and switch element is specially relay switch unit.
Concrete, voltage conversion unit 121 comprises DC/DC step-down chip U1, voltage stabilizing chip U2, resistance R8, R9, R10, electric capacity C2, C3, C4, C5, C6, inductance L 1 and diode D5, in the present embodiment, the model of DC/DC step-down chip U1 is EG1182, and the model of voltage stabilizing chip U2 is LM78L05.More specifically, the pin 1 of DC/DC step-down chip U1 is the input of voltage conversion unit 121, for being connected with the positive pole of battery pack PACK1, PACK2, PACK3 (being realized by battery pack interface J1, J2 and J3), and pin 1 place of DC/DC step-down chip U1 is connected with electric capacity C4, electric capacity C4 is for reducing the high-frequency noise of input ripple voltage and reduction chip input; The pin 2 of DC/DC step-down chip U1 connect with electric capacity C3 after ground connection; The pin 3 of DC/DC step-down chip U1 connect with electric capacity C2 after ground connection; Pin 4 ground connection of DC/DC step-down chip U1; The pin 5 of DC/DC step-down chip U1 is connected with one end of resistance R10 and resistance R9, the other end ground connection of resistance R10, and the other end of resistance R9 is connected with the pin 6 of DC/DC step-down chip U1; The pin 7 of DC/DC step-down chip U1 is output, it is connected with one end of inductance L 1, parallel resistance R8 between the pin 8 of DC/DC step-down chip U1 and pin 1, the other end of inductance L 1 is connected with one end of the negative electrode of diode D5, electric capacity C6 and the input (pin 3) of voltage stabilizing chip U2, the anode of diode D5 and the other end ground connection of electric capacity C6, the output (pin 1) of voltage stabilizing chip U2 exports the operating voltage of+5V direct voltage as microcontroller U0, and the output of voltage stabilizing chip U2 is connected with filter capacitor C5.
Please refer to Fig. 3 again, DC/DC power module 12 comprises 3 isolated locations 123,3 isolated locations 123 are connected to battery pack PACK1, between PACK2, PACK3 and the input of voltage conversion unit 121, concrete, 3 isolated locations 123 are respectively diode D1, D2, D3, the positive pole of diode D1, D2, D3 is connected with the positive pole of battery pack interface J1, J2, J3 respectively, and the negative pole of diode D1, D2, D3 is connected to the input of voltage conversion unit 121 jointly.After isolated location 123 is set, when the voltage of each battery pack PACK1, PACK2, PACK3 is inconsistent due to the existence of isolating diode, circulation can not be formed between each battery pack, the input (positive pole) of DC/DC power module 12 only can from the positive pole power taking of the highest battery pack of voltage, as long as thus have the positive and negative electrode of a battery pack to be connected on battery pack switching device shifter 100, would not be there is the situation of dead electricity in microcontroller U0, thus need not consider the matter of time of the switching between each battery pack.In addition, DC/DC power module 12 also comprises diode D4, the plus earth of diode D4, and the negative pole of the negative electrode of diode D4 and battery pack interface J1, J2, J3 and power stage interface PACK OUT is connected.
Please refer to Fig. 3 again, micro controller module 13 comprises microcontroller U0, electric capacity C1, resistance R4 and key switch S1, electric capacity C1 is filter capacitor, be connected with the pin 10,11,12,39 of microcontroller U0, filtering is carried out for+5V the power supply docked into microcontroller U0, one end of resistance R4 is connected with+5V power supply, and the other end of resistance R4 is connected with one end of the pin 3 of microcontroller U0 and key switch S1, the other end ground connection of key switch S1.Wherein, key switch S1 can be set to input a certain instruction to microcontroller U0, the instruction whether status representative as key switch S1 works, when key switch S1 closes, control battery pack switching device shifter 100 to work, and control battery pack switching device shifter 100 does not work during key switch S1 disconnection, certainly, key switch S1 also can be set to represent other instructions.
Switch module 14 comprises 3 relay switch unit 141, as being designated as the first relay switch unit, the second relay switch unit and the 3rd relay switch unit, the first relay switch unit, the second relay switch unit and the 3rd relay switch unit are connected with battery pack PACK1, PACK2, PACK3 respectively.For wherein the first relay switch unit, its concrete realizing circuit is described below, first relay switch unit comprises resistance R1, resistance R2, triode Q1 and relay switch K1, one end of resistance R1 is connected with+12V power supply, the other end of resistance R1 is connected with the pin 1 of relay switch K1, the pin 2 of relay switch K1 is connected with the collector electrode of triode Q1, the grounded emitter of triode Q1, be connected with first control end (pin 6) of microcontroller U0 after the base series resistor R2 of triode Q1, the pin 3 of relay switch K1 is connected with the positive pole of battery pack interface J1, the pin 4 of relay switch K1 is connected with the positive pole of power stage interface PACK OUT, thus achieve battery pack PACK1 and be connected with the positive pole of power bus by the first relay switch unit, microcontroller U0 is high by exporting, low level gets final product the disconnection or closed of control relay K switch 1, and then control battery pack PACK1 cancellation access or access power bus.In addition, second relay switch unit comprises resistance R3, R5, triode Q2 and relay switch K2,3rd relay switch unit comprises R6, R7, triode Q3 and relay switch K3, circuit structure after each element connects is identical with the circuit structure in the first relay switch unit, no longer describes in detail herein.
Wherein, relay switch K1, K2, K3 are controlled by microcontroller U0, and the process of microcontroller U0 control relay K switch 1, K2, K3, can be controlled by communication program by outside master control, also can be controlled by independent key switch.When relay switch is controlled by microcontroller U0 by independent key switch, battery pack switching device shifter 100 for electric motor car also comprises external key-press module 15, external key-press module 15 comprises the multiple key switches corresponding to relay switch, and each key switch controls the disconnection or closed of each relay switch respectively.As shown in Figure 4, in one embodiment, external key-press module 15 comprises resistance R11, R12, R13 and key switch S2, S3, S4, wherein key switch S2, S3, one end ground connection of S4, the other end of key switch S2 is connected (as I/O port PA0) with an input of one end of resistance R11 and microcontroller U0, the other end of key switch S3 is connected (as I/O port PA1) with another input of one end of resistance R12 and microcontroller U0, the other end of key switch S4 is connected (as I/O port PA6) with an input again of one end of resistance R13 and microcontroller U0.During work, when a certain key switch is pressed, the relay switch not corresponding with key switch first disconnects, and the relay switch corresponding with key switch closes again, thus corresponding battery pack is switched on power bus.Such as: during initial condition, relay switch K1 closes, K2, K3 disconnects, battery pack PACK1 access power bus, when pressing diverter switch (i.e. the key switch S2) of battery pack PACK2, relay switch K1 first disconnects by microcontroller, after carrying out abundant time delay, relay switch K2 is closed, now, battery pack PACK1 has disconnected the connection with power bus, PACK1 can be taken off and carry out charging process, battery pack PACK2 access power bus thinks that electric motor car continues to provide electric energy, when placing back in original position again after battery pack PACK1 charging complete, at battery pack PACK2, when PACK3 electricity deficiency, by relay switch K2, K3 disconnects, K1 closes, then battery pack PACK1 is again for power bus is powered, thus the quick handover operation of the battery pack achieving circulation.
More than in conjunction with most preferred embodiment, the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contain various carry out according to essence of the present utility model amendment, equivalent combinations.
Claims (7)
1., for a battery pack switching device shifter for electric motor car, it is characterized in that, comprising:
DC/DC power module, is connected with the positive pole of multiple battery pack, for described battery pack is carried out voltage transitions with the operating voltage obtained needed for micro controller module and then power for described micro controller module as input power;
Micro controller module, for exporting control command to switch module; And
Switch module, described switch module comprises and described battery pack multiple switch element one to one, the positive pole of multiple described battery pack is connected with the positive pole of power bus respectively by multiple described switch element, the negative pole of multiple described battery pack is connected to the negative pole of described power bus jointly, in multiple described switch element, current closed described switch element disconnects according to described control command and accesses described power bus to end corresponding described battery pack, arbitrary described switch element in multiple described switch element beyond current closed described switch element postpones Preset Time according to described control command and closes so that corresponding described battery pack is accessed described power bus.
2. as claimed in claim 1 for the battery pack switching device shifter of electric motor car, it is characterized in that, described switch module is relay switch array, described switch element is relay switch unit, and described relay switch unit and described micro controller module and corresponding described battery pack connect and access or cancel access described power bus to control described battery pack.
3. as claimed in claim 2 for the battery pack switching device shifter of electric motor car, it is characterized in that, described relay switch unit comprises resistance R1, resistance R2, triode Q1 and relay switch K1, one end of described resistance R1 is connected with+12V power supply, the other end of described resistance R1 is connected with the pin 1 of described relay switch K1, the pin 2 of described relay switch K1 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, be connected with the first control end of described micro controller module after resistance R2 described in the base series of described triode Q1, the pin 3 of described relay switch K1 is connected with the positive pole of corresponding described battery pack, the pin 4 of described relay switch K1 is connected with the positive pole of described power bus, described micro controller module exports described control command to control the disconnection of described relay switch K1 or close and then control described battery pack cancellation access or access described power bus.
4. as claimed in claim 1 for the battery pack switching device shifter of electric motor car, it is characterized in that, described DC/DC power module comprises voltage conversion unit and the multiple isolated locations corresponding to described battery pack, the positive pole of multiple described battery pack is connected with the input of described voltage conversion unit respectively by multiple described isolated location, and described isolated location is used for preventing from forming circulation between multiple described battery pack.
5. as claimed in claim 4 for the battery pack switching device shifter of electric motor car, it is characterized in that, described isolated location is diode, and the positive pole of described diode is connected with the positive pole of corresponding described battery pack, and the negative pole of described diode is connected with the input of described voltage conversion unit.
6. as claimed in claim 5 for the battery pack switching device shifter of electric motor car, it is characterized in that, described voltage conversion unit comprises DC/DC step-down chip U1, voltage stabilizing chip U2, resistance R8, R9, R10, electric capacity C2, C3, C6, inductance L 1 and diode D5, the pin 1 of described DC/DC step-down chip U1 is connected with the positive pole of multiple described battery pack, the pin 2 of described DC/DC step-down chip U1 connect with described electric capacity C3 after ground connection, the pin 3 of described DC/DC step-down chip U1 connect with described electric capacity C2 after ground connection, the pin 5 of described DC/DC step-down chip U1 is connected with one end of described resistance R10 and described resistance R9, the other end ground connection of described resistance R10, the other end of described resistance R9 is connected with the pin 6 of described DC/DC step-down chip U1, the pin 7 of described DC/DC step-down chip U1 is connected with one end of described inductance L 1, the pin 8 described resistance R8 in parallel with between pin 1 of described DC/DC step-down chip U1, the other end of described inductance L 1 and the negative electrode of described diode D5, one end of described electric capacity C6 and the pin 3 of described voltage stabilizing chip U2 connect, the anode of described diode D5 and the other end ground connection of described electric capacity C6, the output of described voltage stabilizing chip U2 exports+5V direct voltage.
7. as claimed in claim 1 for the battery pack switching device shifter of electric motor car, it is characterized in that, also comprise external key-press module, described external key-press module comprises and described battery pack multiple key switch one to one, in order to select the described battery pack being connected to described power bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520383285.1U CN204741299U (en) | 2015-06-04 | 2015-06-04 | A group battery auto -change over device for electric motor car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520383285.1U CN204741299U (en) | 2015-06-04 | 2015-06-04 | A group battery auto -change over device for electric motor car |
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| CN204741299U true CN204741299U (en) | 2015-11-04 |
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| CN201520383285.1U Expired - Fee Related CN204741299U (en) | 2015-06-04 | 2015-06-04 | A group battery auto -change over device for electric motor car |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624714A (en) * | 2018-12-29 | 2019-04-16 | 银隆新能源股份有限公司 | A kind of electric car power supply system |
| CN110203316A (en) * | 2019-04-10 | 2019-09-06 | 苏州力矩优行智能科技有限公司 | A kind of more power controls |
-
2015
- 2015-06-04 CN CN201520383285.1U patent/CN204741299U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624714A (en) * | 2018-12-29 | 2019-04-16 | 银隆新能源股份有限公司 | A kind of electric car power supply system |
| CN109624714B (en) * | 2018-12-29 | 2022-04-19 | 银隆新能源股份有限公司 | Power supply system of electric automobile |
| CN110203316A (en) * | 2019-04-10 | 2019-09-06 | 苏州力矩优行智能科技有限公司 | A kind of more power controls |
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Granted publication date: 20151104 Termination date: 20190604 |