An automatic redundancy circuit for a battery

Abstract

The utility model relates to battery protection technical field discloses an automatic redundancy circuit of battery, including main circuit part and control circuit part, the main circuit part includes first contactor, first diode, second contactor, third contactor, second diode, third diode, permanent load, normal and emergency load, charger and switch, the control circuit part includes first control relay, fourth contactor, relay and fuse, the utility model discloses the circuit design of automatic redundancy of battery system, after detecting charger or battery output back power failure, automatically enable redundancy circuit, use battery to carry out power supply to vehicle, has eliminated the security hidden danger and the accident risk of some vehicle system before cutting off because of circuit failure.

Description

Technical Field

[0001] This utility model belongs to the field of battery protection technology, and in particular relates to an automatic redundancy circuit for a battery. Background Technology

[0002] The train auxiliary inverter supplies the train's three-phase AC 380V load and 110V DC load. Under normal operating conditions, the battery charger within the auxiliary inverter not only charges the train's batteries but also provides 110V DC to the train's electronic equipment, lighting, and low-voltage control components. In the event of a charger failure, the vehicle's batteries replace the charger, supplying power to these critical loads through their circuitry. Railway vehicle batteries are used for starting and ignition in diesel multiple units (DMUs) and for pantograph raising and lighting in electric multiple units (EMUs), serving as an emergency backup power source when external power is lost; they are a vital component of railway vehicles.

[0003] In most projects, the charger and battery are powered by only one circuit (which usually contains components such as contactors and diodes). In the event of a failure of the circuit components, the charger and battery may be unable to supply power, which could lead to serious problems and accidents.

[0004] Figure 1 As a typical design for a battery circuit, the load is divided into three categories: permanent load, normal and emergency load, and time-delay load. If any contactor or diode in this circuit fails, the train will not be able to operate normally. Utility Model Content

[0005] The purpose of this invention is to provide an automatic redundancy circuit design for a battery, which automatically activates the redundancy circuit immediately after detecting a power failure in the charger or battery output, and uses the battery to supply power to the vehicle.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] This utility model embodiment provides an automatic redundancy circuit for a storage battery, including a main circuit part and a control circuit part;

[0008] The main circuit section includes a first contactor and a first diode, and also includes a second contactor, a third contactor, a second diode, a third diode, a permanent load, normal and emergency loads, a charger, and a switch;

[0009] One end of the charger is connected to one end of the second diode and one end of the third diode; the other end of the second diode is connected to the second contactor; the other end of the third diode is connected to the third contactor; and the other ends of the second contactor and the third contactor are connected to the normal and emergency loads, respectively.

[0010] The other end of the charger is connected to one end of the first contactor and then to one end of the switch;

[0011] The other end of the first contactor is connected to the first diode and then to the permanent load;

[0012] The control circuit includes a first control relay, a fourth contactor, a relay, and a fuse;

[0013] The first control relay is connected to the fourth contactor and then connected to one end of the first trigger relay and the second trigger relay, respectively; the other ends of the first trigger relay and the second trigger relay are both connected to the fifth contactor.

[0014] One end of the fuse is connected to the wire connecting the charger to the second and third diodes;

[0015] The other end of the fuse is connected to the third trigger relay, and the connection between the two is in parallel with the connection of the fifth contactor.

[0016] Preferably, it also includes a first undervoltage protection relay, a second undervoltage protection relay, a first time delay relay, a sixth contactor, and a second control relay;

[0017] The first undervoltage protection relay and the second undervoltage protection relay are connected in parallel and then connected to the second control relay; the first time delay relay is connected in series with the sixth contactor.

[0018] Preferably, it also includes a second time-delay relay, a seventh contactor, a third undervoltage protection relay, a fourth undervoltage protection relay, and a fifth undervoltage protection relay;

[0019] The connection of the second time delay relay is in parallel with the connection of the first time delay relay.

[0020] The connection of the third undervoltage protection relay is connected in parallel with the connection of the second time delay relay;

[0021] The fourth undervoltage protection relay and the seventh contactor are connected in series, and the connection between the two is connected in parallel with the connection of the third undervoltage protection relay.

[0022] The connection of the fifth undervoltage protection relay is connected in parallel with the connection of the fourth undervoltage protection relay and the seventh contactor.

[0023] Preferably, it also includes a positive electrode fuse, a negative electrode fuse, and a storage battery;

[0024] In the main circuit, the other end of the switch is connected to the positive fuse and then to the positive terminal of the battery; the negative fuse is connected to the negative terminal of the battery.

[0025] The present invention has the following beneficial effects: Through the automatic redundancy circuit design of the battery system, the present invention automatically activates the redundant circuit after detecting the loss of power output from the charger or battery, and uses the battery to power the vehicle, thus eliminating the safety hazards and accident risks caused by the disconnection of some vehicle systems due to circuit failure. Attached Figure Description

[0026] To better understand and implement this application, the technical solution is described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the conventional circuit structure of a storage battery provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the battery redundancy circuit provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the main circuit provided in an embodiment of this utility model;

[0030] Figure 4 A schematic diagram of the control circuit provided in an embodiment of this utility model;

[0031] Explanation of reference numerals in the attached figures

[0032] In the diagram: 1. First contactor; 2. First diode; 3. Second contactor; 4. Third contactor; 5. Second diode; 6. Third diode; 7. Permanent load; 8. Normal and emergency load; 9. Charger; 10. Switch; 11. First control relay; 12. Fourth contactor; 13. First trigger relay; 14. Second trigger relay; 15. Fifth contactor; 16. Third trigger relay; 17. Fuse; 18. First undervoltage protection relay; 19. Second undervoltage protection relay; 20. First time-delay relay; 21. Sixth contactor; 22. Second control relay; 23. Second time-delay relay; 24. Seventh contactor; 25. Third undervoltage protection relay; 26. Fourth undervoltage protection relay; 27. Fifth undervoltage protection relay; 28. Positive fuse; 29. ​​Negative fuse; 30. Battery; 31. Time-delay load. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0035] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] Please see Figure 2-4 This utility model provides an automatic redundancy circuit for a storage battery, including a main circuit section and a control circuit section;

[0038] The main circuit section includes a first contactor 1 and a first diode 2, and also includes a second contactor 3, a third contactor 4, a second diode 5, a third diode 6, a permanent load 7, normal and emergency loads 8, a charger 9, and a switch 10.

[0039] Among them, one end of the charger 9 is connected to one end of the second diode 5 and the third diode 6 respectively; the other end of the second diode 5 is connected to the second contactor 3; the other end of the third diode 6 is connected to the third contactor 4; and the other ends of the second contactor 3 and the third contactor 4 are connected to the normal and emergency loads 8 respectively.

[0040] The other end of the charger 9 is connected to one end of the first contactor 1 and then to one end of the switch 10;

[0041] The other end of the first contactor 1 is connected to the first diode 2 and then to the permanent load 7;

[0042] The control circuit includes a first control relay 11, a fourth contactor 12, a first trigger relay 13, a second trigger relay 14, a fifth contactor 15, a third trigger relay 16, and a fuse 17.

[0043] The first control relay 11 is connected to the fourth contactor 12 and then connected to one end of the first trigger relay 13 and the second trigger relay 14 respectively; the other ends of the first trigger relay 13 and the second trigger relay 14 are both connected to the fifth contactor 15.

[0044] One end of the fuse 17 is connected to the line connecting the charger 9 and the second diode 5 and the third diode 6 in the main circuit section;

[0045] The other end of fuse 17 is connected to the third trigger relay 16, and the connection between the two is in parallel with the connection of the fifth contactor 15.

[0046] In one embodiment provided by this utility model, the automatic redundancy circuit further includes a first undervoltage protection relay 18, a second undervoltage protection relay 19, a first time delay relay 20, a sixth contactor 21, and a second control relay 22;

[0047] Among them, the first undervoltage protection relay 18 and the second undervoltage protection relay 19 are connected in parallel and then connected to the second control relay 22; the first time delay relay 20 is connected in series with the sixth contactor 21.

[0048] In one embodiment provided by this utility model, the automatic redundancy circuit further includes a second time delay relay 23, a seventh contactor 24, a third undervoltage protection relay 25, a fourth undervoltage protection relay 26, and a fifth undervoltage protection relay 27.

[0049] Among them, the connection of the second time delay relay 23 is connected in parallel with the connection of the first time delay relay 20;

[0050] The wiring of the third undervoltage protection relay 25 is connected in parallel with the wiring of the second time delay relay 23;

[0051] The fourth undervoltage protection relay 26 and the seventh contactor 24 are connected in series, and the connection between the two is connected in parallel with the connection of the third undervoltage protection relay 25.

[0052] The connection of the fifth undervoltage protection relay 27 is connected in parallel with the connection of the fourth undervoltage protection relay 26 and the seventh contactor 24.

[0053] In one embodiment provided by this utility model, the automatic redundancy circuit further includes a positive electrode fuse 28, a negative electrode fuse 29, and a storage battery 30;

[0054] In the main circuit, the other end of the switch 10 is connected to the positive fuse 28 and then to the positive end of the battery 30; the negative fuse 29 is connected to the negative end of the battery 30.

[0055] The operating mode of the automatic redundancy circuit in this embodiment is as follows:

[0056] 1) Normal working mode:

[0057] At this time, the charger 9 and the battery 30 are powered normally. The first trigger relay 13 and the second trigger relay 14 in the control circuit are activated, disconnecting the output of the fourth contactor 12 in the control circuit and the first contactor 1 in the main circuit. At this time, the power is supplied by the normal circuit.

[0058] 2) Fault mode:

[0059] When the first trigger relay 13 and the second trigger relay 14 fail to detect the input source of the charger 9 and the battery 30 (which means that the normal operating circuit is faulty), the first trigger relay 13 and the second trigger relay 14 lose power and reset their contacts. The circuits of the first contactor 1 and the fourth contactor 12 are energized and engaged due to the reset of the normally closed contacts of the trigger relays. The power supply of the charger 9 and the battery 30 is output through the redundant circuit.

[0060] In summary, this utility model, through the automatic redundancy circuit design of the battery system, automatically activates the redundant circuit after detecting a power failure in the charger or battery output, and uses the battery to power the vehicle, thus eliminating the safety hazards and accident risks caused by the disconnection of some vehicle systems due to circuit failures.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An automatic redundancy circuit for a storage battery, characterized in that: It includes the main circuit section and the control circuit section; The main circuit section includes a first contactor (1) and a first diode (2), and also includes a second contactor (3), a third contactor (4), a second diode (5), a third diode (6), a permanent load (7), a normal and emergency load (8), a charger (9), and a switch (10); Among them, one end of the charger (9) is connected to one end of the second diode (5) and the third diode (6); the other end of the second diode (5) is connected to the second contactor (3); the other end of the third diode (6) is connected to the third contactor (4); the other ends of the second contactor (3) and the third contactor (4) are connected to the normal and emergency loads (8) respectively. The other end of the charger (9) is connected to one end of the first contactor (1) and then to one end of the switch (10); The other end of the first contactor (1) is connected to the first diode (2) and then to the permanent load (7); The control circuit includes a first control relay (11), a fourth contactor (12), a first trigger relay (13), a second trigger relay (14), a fifth contactor (15), a third trigger relay (16), and a fuse (17); Among them, the first control relay (11) is connected to the fourth contactor (12) and then connected to one end of the first trigger relay (13) and the second trigger relay (14); the other end of the first trigger relay (13) and the second trigger relay (14) are both connected to the fifth contactor (15); One end of the fuse (17) is connected to the line connecting the charger (9) and the second diode (5) and the third diode (6); The other end of the fuse (17) is connected to the third trigger relay (16), and the connection between the two is in parallel with the connection of the fifth contactor (15).

2. The automatic redundancy circuit for a storage battery according to claim 1, characterized in that: It also includes a first undervoltage protection relay (18), a second undervoltage protection relay (19), a first time delay relay (20), a sixth contactor (21), and a second control relay (22); Among them, the first undervoltage protection relay (18) and the second undervoltage protection relay (19) are connected in parallel and then connected to the second control relay (22); the first time delay relay (20) is connected in series with the sixth contactor (21).

3. The automatic redundancy circuit for a storage battery according to claim 1, characterized in that: It also includes a second time delay relay (23), a seventh contactor (24), a third undervoltage protection relay (25), a fourth undervoltage protection relay (26), and a fifth undervoltage protection relay (27); Among them, the connection line where the second time delay relay (23) is located is connected in parallel with the connection line where the first time delay relay (20) is located; The connection of the third undervoltage protection relay (25) is connected in parallel with the connection of the second time delay relay (23); The fourth undervoltage protection relay (26) and the seventh contactor (24) are connected in series, and the connection between the two is connected in parallel with the connection of the third undervoltage protection relay (25); The connection of the fifth undervoltage protection relay (27) is connected in parallel with the connection of the fourth undervoltage protection relay (26) and the seventh contactor (24).

4. The automatic redundancy circuit for a storage battery according to claim 1, characterized in that: It also includes a positive electrode fuse (28), a negative electrode fuse (29), and a storage battery (30); In the main circuit, the other end of the switch (10) is connected to the positive fuse (28) and then to the positive end of the battery (30); the negative fuse (29) is connected to the negative end of the battery (30).

Images