Battery pack activation control device, power supply system and engineering mechanical equipment

Abstract

The invention discloses a battery pack activation control device, a power supply system and engineering mechanical equipment. The control device comprises a battery management system, a charger, a time delay relay and a control module, the battery management system is connected with the battery pack and the charger; the control module is connected with a coil and a contact of the time-delay relay, and the contact of the time-delay relay is further connected with the battery management system. On the basis of an existing charging activation circuit of the battery pack, the control module and the delay relay are added to indirectly activate the discharging function of the battery pack, hardware circuit design is reduced, and the problem that activation discharging of an external key switch is greatly affected by a hard wire is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery control, and in particular relates to a battery pack activation control device, a power supply system and engineering machinery equipment. Background Art

[0002] The activation and discharge method of lithium batteries on engineering machinery and equipment generally adopts the direct activation and discharge method of external key switch or the direct activation and discharge method of lithium battery body switch. The direct activation and discharge method of external key switch is greatly affected by the hardware circuit. When the circuit fails, it may cause the lithium battery to fail to discharge normally; the direct activation and discharge method of lithium battery body switch has the disadvantage of cumbersome power-on operation. Summary of the invention

[0003] The object of the present invention is to provide a battery pack activation control device, a power supply system and engineering machinery equipment to solve at least one of the problems that the activation and discharge using an external key switch is greatly affected by hard wires, and the problem that the main body switch activation and discharge has cumbersome power-on operations.

[0004] The present invention solves the above technical problems through the following technical solutions: a battery pack activation control device, including a battery management system, a charger, a time delay relay and a control module; the battery management system is connected to the battery pack and the charger; the control module is connected to the coil and contacts of the time delay relay, and the contacts of the time delay relay are also connected to the battery management system.

[0005] When the battery pack needs to be activated to discharge the load, the control module controls the coil of the delay relay to be energized, and the contacts of the delay relay are first closed and then opened, so that the battery management system is powered on and then powered off. The battery pack is activated by short-term power-on of the battery management system, allowing the battery pack to discharge the load.

[0006] Furthermore, the control module includes a control switch and a power supply; a first end of the control switch is connected to the power supply, and a second end of the control switch is connected to the coil and contacts of the time delay relay.

[0007] Furthermore, a diode D1 is provided between the contact of the time delay relay and the battery management system.

[0008] Furthermore, a diode D2 is provided between the charger and the battery management system.

[0009] Furthermore, the device also includes a local switch, and the local switch is connected to the battery management system and an external power supply.

[0010] Furthermore, the battery pack is a lithium battery pack.

[0011] Based on the same concept, the present invention also provides a power supply system, which includes the battery pack activation control device as described above.

[0012] Based on the same concept, the present invention also provides an engineering machinery equipment, which includes the power supply system as described above.

[0013] Beneficial Effects

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The present invention briefly powers on the battery management system through the contacts of the delay relay while the coil of the delay relay is energized, and the battery pack is activated by the short-time power-on of the battery management system. The contacts of the delay relay are briefly closed and then disconnected, so that the battery pack is first activated and then discharged. The present invention adds a control module and a delay relay on the basis of an existing charging activation circuit of the battery pack to indirectly activate the discharge function of the battery pack, which is simple and effective, reduces hardware circuit design, improves the problem that the external key switch activation discharge is greatly affected by the hard line, and avoids the problem that the local switch activation discharge mode is complicated. The delay relay is used to enter the discharge mode without entering the charging mode, and the discharge is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of a battery pack activation control device in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0020] like Figure 1As shown, a battery pack activation control device provided in an embodiment of the present invention includes a battery management system (i.e., BMS), a charger, a time delay relay, and a control module; the battery management system is connected to the battery pack and the charger; the control module is connected to the coil KT and the normally closed contact KT-1 of the time delay relay, and the normally closed contact KT-1 of the time delay relay is also connected to the battery management system.

[0021] When the discharge function of the battery pack needs to be activated, the coil KT of the delay relay is energized through the control module, and a voltage level is applied to one end of the normally closed contact KT-1 of the delay relay. The normally closed contact KT-1 of the delay relay is closed first and then disconnected, so that the battery management system is powered on first and then powered off. The battery pack is activated by the short-term power-on of the battery management system, so that the battery pack discharges the load; at the same time, the short-term power-on of the battery management system will not trigger the charging CAN communication alarm between the battery management system and the charger, that is, the charging mode will not be entered. The present invention adds a control module and a delay relay on the basis of the existing charging activation circuit of the battery pack itself, and indirectly activates the discharge function of the battery pack through the control module and the delay relay, thereby reducing the hardware circuit design and improving the problem that the external key switch activation discharge mode is greatly affected by the hard line; at the same time, the present invention can realize the automatic control of the battery management system to power on and then power off for a short time.

[0022] In a specific embodiment of the present invention, the control module includes a control switch S and a power supply VCC (for example, a 12V power supply); the first end of the control switch S is connected to the power supply VCC, and the second end of the control switch S is connected to the coil KT of the delay relay and the normally closed contact KT-1. When the control switch S is closed, the power supply VCC supplies power to the coil KT of the delay relay, and the coil KT of the delay relay is energized, so that the normally closed contact KT-1 of the delay relay is closed and then disconnected; when the normally closed contact KT-1 of the delay relay is closed, the power supply VCC powers up the battery management system through the control switch S and the normally closed contact KT-1 of the delay relay, activating the discharge function of the battery pack; when the normally closed contact KT-1 of the delay relay is disconnected again, the connection between the power supply VCC and the battery management system is disconnected, and the short-term power-on will not trigger the charging CAN communication alarm between the battery pack and the charger.

[0023] In a specific embodiment of the present invention, a diode D1 is provided between the normally closed contact KT-1 of the time delay relay and the battery management system; a diode D2 is provided between the charger and the battery management system. The diode has a unidirectional conductivity, that is, when a forward voltage is applied to the two poles of the diode, the diode is turned on; when a reverse voltage is applied to the two poles of the diode, the diode is turned off. The diode D1 and the diode D2 prevent mutual interference between the control module and the charger.

[0024] In a specific embodiment of the present invention, the activation control device further comprises a local switch SB, which is connected to the battery management system and the external power supply. The discharge function of the battery pack can be directly activated by the local switch SB, and the local switch SB directly activates the discharge mode.

[0025] In a specific embodiment of the present invention, the battery pack is a lithium battery pack.

[0026] The activation control logic of the battery pack of the present invention is independent of the logic control of the engineering machinery equipment, and the discharge is safer and more reliable. The independent activation control device is conducive to troubleshooting, convenient for technical problem analysis, reduces market maintenance and after-sales costs, and shortens the user's invalid standby maintenance time.

[0027] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A battery pack activation control device, characterized in that: The control device includes a battery management system, a charger, a time delay relay and a control module; the battery management system is connected to the battery pack and the charger; the control module is connected to the coil and contacts of the time delay relay, and the contacts of the time delay relay are also connected to the battery management system.

2. The battery pack activation control device according to claim 1, characterized in that: The control module includes a control switch and a power supply; a first end of the control switch is connected to the power supply, and a second end of the control switch is connected to the coil and the contact of the time delay relay.

3. The battery pack activation control device according to claim 1, characterized in that: A diode D1 is further provided between the contact of the time delay relay and the battery management system.

4. The battery pack activation control device according to claim 1, characterized in that: A diode D2 is further provided between the charger and the battery management system.

5. The battery pack activation control device according to claim 1, characterized in that: The device further comprises a local switch, wherein the local switch is connected to the battery management system and an external power source.

6. The battery pack activation control device according to any one of claims 1 to 5, characterized in that: The battery pack is a lithium battery pack.

7. A power supply system, characterized in that: The power supply system includes the battery pack activation control device according to any one of claims 1 to 6.

8. An engineering machinery equipment, characterized in that: The engineering machinery equipment includes the power supply system as claimed in claim 7.

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