Battery pack activation control apparatus, power supply system and engineering machinery

Abstract

Disclosed in the present invention are a battery pack activation control apparatus, a power supply system and engineering machinery. The battery pack activation control apparatus comprises 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 a coil and a contact of the time-delay relay, and the contact of the time-delay relay is also connected to the battery management system. On the basis of an existing charging activation circuit of the battery pack, the present invention additionally provides a control module and a time-delay relay to indirectly realize the activation of the discharge function of the battery pack, thereby reducing the design of hardware circuits, and alleviating the problem of discharge activation by an external key switch being greatly affected by hard wiring.

Description

Battery pack activation control device, power system and engineering machinery equipment Technical Field

[0001] This invention belongs to the field of battery control technology, and particularly relates to a battery pack activation control device, a power supply system, and engineering machinery equipment. Background Technology

[0002] The activation and discharge methods for lithium batteries in construction machinery equipment generally employ either an external key switch or a battery-mounted switch. The external key switch method requires separate wiring, and a wiring fault may prevent the lithium battery from discharging properly. The battery-mounted switch method, on the other hand, is cumbersome to operate upon power-on. Summary of the Invention

[0003] The purpose of this 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 of external key switch activation discharge being greatly affected by hard wires and the cumbersome power-on operation of body switch activation discharge.

[0004] In a first aspect, embodiments of this application provide a battery pack activation control device, which 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.

[0005] When it is necessary to activate the battery pack to discharge the load, the control module controls the coil of the time delay relay to be energized. The contacts of the time delay relay close first and then open, so that the battery management system is powered on and then powered off. The battery pack is activated by the short power-on of the battery management system, so that the battery pack can discharge the load.

[0006] In some embodiments, the contacts of the time-delay relay are used to connect to the battery management system via a connection line between the charger and the battery management system.

[0007] In some embodiments, the contacts of the time-delay relay are used to connect to the battery management system via the positive line between the charger and the battery management system.

[0008] In some embodiments, a diode D1 is also provided between the contacts of the time delay relay and the battery management system to prevent interference between the control module and the charger.

[0009] In some embodiments, the contacts of the time delay relay are used to connect to the battery management system via the positive line between the charger and the battery management system, and the diode D1 is located between the contact of the time delay relay and the connection point of the positive line of the charger, and is conductive in the direction from the contact to the connection point.

[0010] In some embodiments, a diode D2 is also provided between the charger and the battery management system to prevent interference between the charger and the control module.

[0011] In some embodiments, the contacts of the time delay relay are used to connect to the battery management system via the positive line between the charger and the battery management system, and the diode D2 is located between the connection point of the charger and the contacts of the time delay relay and the positive line of the charger, and is conductive in the direction from the charger to the connection point.

[0012] In some embodiments, the control module includes a control switch and a power supply. A first terminal of the control switch is connected to the power supply, and a second terminal of the control switch is connected to the coil and contacts of a time-delay relay.

[0013] In some embodiments, the control switch is a remote wireless control switch or a waterproof and dustproof switch.

[0014] In some embodiments, the control module further includes a backup power supply.

[0015] In some embodiments, an overvoltage protection diode is provided at the input terminal of the power supply.

[0016] In some embodiments, the device further includes a local switch connected to the battery management system and an external power source.

[0017] In some embodiments, the battery pack is a lithium battery pack.

[0018] Secondly, the present invention also provides a power system including the battery pack activation control device as described above.

[0019] Thirdly, the present invention also provides an engineering machinery device, which includes the power supply system described above.

[0020] This invention provides a short-term power supply to the battery management system (BMS) via the BMS contacts while the coil of the time-delay relay is energized. This short-term power supply activates the battery pack. The BMS contacts then briefly close and reopen, activating the battery pack before it discharges. This invention adds a control module and a time-delay relay to the existing charging activation circuit of the battery pack to indirectly activate the battery pack's discharge function. This is simple and effective, reduces hardware circuitry, and improves upon the issue of external key switch activation being significantly affected by hard wiring. It also avoids the cumbersome power-on operation of local switch activation. Furthermore, the time-delay relay allows the battery to enter discharge mode before charging, making discharge safer and more reliable. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of a battery pack activation control device according to an embodiment of the present invention.

[0023] Figure 2 is another schematic diagram of a battery pack activation control device according to an embodiment of the present invention.

[0024] Figure 3 is another schematic diagram of the principle of a battery pack activation control device according to an embodiment of the present invention.

[0025] Reference numerals: 1. Battery Management System; 2. Charger; 3. Time Delay Relay; 31. Coil; 32. Contact / Normally Closed Contact; 4. Control Module; 41. Control Switch; 42. Power Supply; 43. Backup Power Supply; 5. Diode D1; 6. Diode D2; 7. Local Switch; 8. Overvoltage Protection Diode. Detailed Implementation

[0026] The technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0028] As shown in Figure 1, an embodiment of the present invention provides a battery pack activation control device, which includes a battery management system (BMS), a charger 2, a time delay relay 3, and a control module 4. The battery management system 1 is connected to the battery pack and the charger 2. The control module 4 is connected to the coil 31 (KT) and normally closed contact 32 (KT-1) of the time delay relay 3. For example, the normally closed contact 32 (KT-1) of the time delay relay 3 is also connected to the battery management system 1. For instance, the contact 32 of the time delay relay 3 is used to connect to the battery management system 1 via a connection line between the charger 1 and the battery management system 1. In one example, the contact 32 of the time delay relay 3 is used to connect to the battery management system 1 via a positive line between the charger 2 and the battery management system 1.

[0029] It should be noted that contact 32 can also be a normally open contact, and this application does not impose any restrictions on this. For the sake of convenience, the normally closed contact 32 will be used as an example for the following description.

[0030] When the battery pack's discharge function needs to be activated, the control module 4 controls the coil KT of the time-delay relay 3 to be energized. Simultaneously, a voltage level is applied to one end of the normally closed contact 32 (KT-1) of the time-delay relay 3. The normally closed contact 32 (KT-1) of the time-delay relay 3 first closes and then opens, allowing the battery management system 1 to activate the battery pack through a short-term power-on, enabling the battery pack to discharge to the load. Simultaneously, the short-term power-on of the battery management system 1 will not trigger the charging CAN communication alarm between the battery management system 1 and the charger 2, i.e., it will not enter charging mode. This invention adds a control module 4 and a time-delay relay 3 to the existing charging activation circuit of the battery pack, indirectly activating the battery pack's discharge function through these components. This reduces hardware circuit design and improves the problem of the external key switch activation discharge method being greatly affected by hard wiring. Furthermore, this invention enables automatic control of the battery management system 1's short-term power-on and power-off.

[0031] In some embodiments of the present invention, the control module 4 includes a control switch 41(S) and a power supply 42 (VCC, e.g., a 12V power supply). The first terminal of the control switch 41(S) is connected to the power supply VCC, and the second terminal of the control switch 41(S) is connected to the coil 31(KT) and normally closed contact 32(KT-1) of the time-delay relay 3. When the control switch 41(S) is closed, the power supply 42(VCC) supplies power to the coil 31(KT) of the time-delay relay 3, energizing the coil 31(KT) and causing the normally closed contact 32(KT-1) of the time-delay relay 3 to close and then open. When the normally closed contact 32(KT-1) of the time-delay relay 3 is closed, the power supply 42(VCC) powers the battery management system 1 through the control switch 41(S) and the normally closed contact 32(KT-1) of the time-delay relay 3, activating the battery pack's discharge function. When the normally closed contact 32 (KT-1) of the time delay relay 3 opens again, the connection between the power supply 42 (VCC) and the battery management system 1 is disconnected. A short power-on will not trigger the charging CAN communication alarm between the battery pack and the charger 2.

[0032] It should be noted that power supply 42 can also be configured as other power supply models as needed, and this application does not impose any restrictions on this.

[0033] Referring to Figures 2 and 3, in some embodiments, the control module 4 may further include a backup power supply 43, which can still activate the system in the event of a power supply failure 42, thereby improving system reliability. In some implementations, the control switch 41 may be a waterproof and dustproof push-button switch to adapt to the harsh environment of construction machinery. Alternatively, the control switch 41 may be a remote wireless control switch (such as an RF / Bluetooth module), enabling remote activation from the cockpit.

[0034] Referring to Figure 3, in some embodiments, an overvoltage protection diode 8 (such as a TVS diode) is provided at the input terminal of the power supply 42 to prevent voltage surges from damaging the time delay relay 3.

[0035] In some embodiments of the present invention, a diode D15 is further provided between the normally closed contact 32 (KT-1) of the time delay relay 3 and the battery management system 1. For example, diode D15 is located between the connection point of the contact 32 of the time delay relay 3 and the positive terminal line of the charger 2, and conducts in the direction from the contact 32 to the connection point. In some embodiments, a diode D26 is further provided between the charger 2 and the battery management system 1. For example, diode D26 is located between the connection point of the contact 32 of the time delay relay 3 and the positive terminal line of the charger 2, and conducts in the direction from the charger to the connection point. The diode has unidirectional conductivity, that is, the diode conducts when a forward voltage is applied across its terminals. The diode is cut off when a reverse voltage is applied across its terminals. By providing diodes D15 and D26, mutual interference between the control module 4 and the charger 2 can be prevented.

[0036] In some embodiments, the delay time of the time-delay relay 3 is 0.5 seconds to 2 seconds (which can be adjusted according to the BMS wake-up time) to ensure that the battery management system 1 completes initialization but does not trigger charging communication. The coil 31 of the time-delay relay 3 is matched with the power supply 42 of the control module 4 (e.g., 12V / 24VDC) to avoid relay failure caused by voltage incompatibility.

[0037] In some embodiments of the present invention, the activation control device further includes a local switch 7(SB), which is connected to the battery management system 1 (the connection between the battery management system 1 and the local switch is not shown in the figure, but can be referred to conventional techniques in the art). The discharge function of the battery pack can be directly activated through the local switch 7(SB), retaining the direct activation discharge mode of the local switch 7(SB) for use when other activation discharge methods fail.

[0038] In some embodiments of the present invention, the battery pack is a lithium battery pack.

[0039] The battery pack activation control logic of this invention is independent of the logic control of engineering machinery equipment, making discharge safer and more reliable. The independent activation control device facilitates fault diagnosis, technical problem analysis, reduces market maintenance and after-sales costs, and shortens the user's ineffective standby maintenance time.

[0040] Secondly, the present invention also provides a power system including the battery pack activation control device as described above.

[0041] Thirdly, the present invention also provides an engineering machinery device, which includes the power supply system described above.

[0042] The aforementioned construction machinery can include loaders, excavators, tunnel boring machines, and engineering vehicles, etc.

[0043] It should be noted that, as needed, all or part of the above embodiments can be combined. For example, one embodiment can be combined with one or more other embodiments to form a new embodiment, or a part of one embodiment can be combined with one or more other embodiments to form a new embodiment, or a part of one embodiment can be combined with parts of one or more other embodiments to form a new embodiment, or some technical features of some embodiments can be omitted to form a new embodiment.

[0044] The above description only discloses specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or modifications that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection 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 used to connect to the battery management system.

2. The battery pack activation control device according to claim 1, characterized in that: The contacts of the time-delay relay are used to connect to the battery management system via a connection line between the charger and the battery management system.

3. The battery pack activation control device according to claim 2, characterized in that: The contacts of the time-delay relay are used to connect to the battery management system via the positive line between the charger and the battery management system.

4. The battery pack activation control device according to any one of claims 1 to 3, characterized in that: A diode D1 is also provided between the contacts of the time delay relay and the battery management system to prevent interference between the control module and the charger.

5. The battery pack activation control device according to claim 4, characterized in that: The contacts of the time delay relay are used to connect to the battery management system through the positive line between the charger and the battery management system. The diode D1 is located between the contact of the time delay relay and the connection point of the positive line of the charger, and is conductive in the direction from the contact to the connection point.

6. The battery pack activation control device according to any one of claims 1 to 5, characterized in that: A diode D2 is also provided between the charger and the battery management system to prevent interference between the charger and the control module.

7. The battery pack activation control device according to claim 6, characterized in that: The contacts of the time delay relay are used to connect to the battery management system through the positive line between the charger and the battery management system. The diode D2 is located between the contact of the charger and the time delay relay and the connection point of the positive line of the charger, and is conductive in the direction from the charger to the connection point.

8. The battery pack activation control device according to any one of claims 1 to 7, characterized in that: The control module includes a control switch and a power supply; the first end of the control switch is connected to the power supply, and the second end of the control switch is connected to the coil and contacts of the time delay relay.

9. The battery pack activation control device according to claim 8, characterized in that: The control switch is a remote wireless control switch or a waterproof and dustproof switch.

10. The battery pack activation control device according to claim 8 or 9, characterized in that: The control module also includes a backup power supply.

11. The battery pack activation control device according to any one of claims 8 to 10, characterized in that: The power supply input terminal is equipped with an overvoltage protection diode.

12. The battery pack activation control device according to any one of claims 1 to 11, characterized in that: The device also includes a local switch connected to the battery management system.

13. The battery pack activation control device according to any one of claims 1 to 12, characterized in that: The battery pack is a lithium battery pack.

14. A power supply system, characterized in that: The power system includes a battery pack activation control device as described in any one of claims 1 to 13.

15. An engineering machinery equipment, characterized in that: The engineering machinery equipment includes the power system as described in claim 14.

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