Low-voltage electrical protection loop structure based on storage battery pack

Abstract

The utility model discloses a low-voltage electrical protection loop structure based on a storage battery pack, which comprises a load and a storage battery pack for providing electric energy for the load, and an electric quantity detection unit for detecting the health state of the storage battery pack is arranged between the storage battery pack and the load. A power switch used in cooperation with the storage battery pack is arranged on the side edge of the electric quantity detection unit, the output end of the storage battery pack is electrically connected with the power end of the electric quantity detection unit and the power end of the power switch, and the signal output end of the electric quantity detection unit is electrically connected with the signal receiving end of the power switch. And the voltage output end of the electric quantity detection unit is electrically connected with the load. According to the storage battery pack management system, the problem that irreversible damage of a load is easily caused when a traditional storage battery pack management system is used in the prior art is solved. The utility model has the advantages of simple circuit structure, convenient installation, high safety and the like.

Description

Technical Field

[0001] The utility model relates to the field of circuit structures, and more specifically, to a low-voltage electrical protection circuit structure for a battery pack based on a battery pack. Background Art

[0002] At present, a battery pack management system and a battery pack charging management system are disclosed on the Chinese Patent Network, with the publication number CN201466766U. The battery pack management system includes a battery pack and a main circuit control system. The battery pack includes two or more battery sub-groups. Each battery sub-group includes at least one battery cell and a sub-circuit control system. The main circuit control system includes a main circuit display unit, a main circuit measurement unit, a main circuit storage unit, a main circuit microprocessing unit, a main circuit communication interface unit, and a main circuit power supply unit. The sub-circuit control system includes a sub-circuit measurement unit, a sub-circuit communication interface unit, a sub-circuit storage unit, a sub-circuit microprocessing unit, and a sub-circuit power supply unit. The system of the utility model is simple, convenient to maintain, has a simple circuit design, and both the manufacturing and application costs are relatively low, and it can improve the service life and overall utilization efficiency of the battery pack.

[0003] Although the battery pack management system and the battery pack charging management system in the above patent have the advantages of being convenient to maintain and having a simple circuit design, there is no mechanism in the battery pack management system for disconnecting the battery pack from the load port when the battery pack has an abnormality. As a result, when the battery pack has an abnormality, it is easy to cause irreversible damage to the load. Summary of the Utility Model

[0004] In order to overcome the problem in the prior art that the traditional battery pack management system is prone to cause irreversible damage to the load during use, the utility model provides a low-voltage electrical protection circuit structure for a battery pack based on a battery pack, which has the function of protecting the load.

[0005] A low-voltage electrical protection circuit structure for a battery pack based on a battery pack of the utility model includes a load and a battery pack for supplying electric energy to the load. A power quantity detection unit for detecting the health state of the battery pack is provided between the battery pack and the load. A power switch used in cooperation with the battery pack is provided beside the power quantity detection unit. The output end of the battery pack is electrically connected to the power supply end of the power quantity detection unit and the power supply end of the power switch respectively. The signal output end of the power quantity detection unit is electrically connected to the signal receiving end of the power switch. The voltage output end of the power quantity detection unit is electrically connected to the load.

[0006] Since the storage battery is a key management object for customers, in order to prevent over-discharging during the use of the load or the situation of not replenishing the power for a long time from affecting the service life and endurance time of the storage battery and to maximize the utilization of the storage battery, a scheme for electrical protection of the storage battery pack is designed.

[0007] In the present utility model, a low-voltage protection circuit for the storage battery pack is additionally designed on the storage battery used in the traditional AGV to avoid the adverse effects on the storage battery pack caused by over-discharging during the use of the load or not replenishing the power for a long time.

[0008] Preferably, the power switch includes a relay. The left end of the switch in the relay is electrically connected to the positive electrode of the storage battery pack. The right end of the switch in the relay is electrically connected to the 1-pin of the power detection unit. The left end of the coil in the relay is electrically connected to the 4-pin of the power detection unit. The right end of the coil in the relay is electrically connected to the 3-pin of the power detection unit.

[0009] Preferably, the negative electrode of the storage battery pack is electrically connected to the 2-pin of the power detection unit.

[0010] Preferably, the 5-pin of the power detection unit is electrically connected to one end of the load, and the 6-pin of the power detection unit is electrically connected to the other end of the load.

[0011] In the present utility model, a power detection unit is added to the original control unit. The power detection unit is connected to the device power switch through a wire harness, and the power switch is then connected to the storage battery and the power detection unit. When the power detection unit detects that the voltage of the storage battery pack is low, it will output a high-level signal and transmit it to the device power switch through the wire harness to realize the function of disconnecting the power supply, and the purpose of protecting the storage battery pack is achieved by using a simple electrical protection circuit.

[0012] Storage battery pack: The storage battery pack supplies power to external circuits and loads, stores electrical energy and can provide power to the load at any time.

[0013] Relay: The relay is installed and connected in the control circuit, used to disconnect and connect the circuit, selects a suitable capacity according to the use requirements of the external circuit, and plays the role of connecting or disconnecting the circuit.

[0014] Battery power detection unit: The model of the battery power detection unit used is N61F30964 = 1. Before use, a detection value for low voltage can be set through the PC. The battery power detection unit monitors the power in real time. When the detected power is less than the set value, it outputs a high-level signal to disconnect the circuit power supply and protect the battery pack. It uses the power supply of the battery pack to work and simultaneously detects the voltage magnitude. When the detected voltage is less than the set value, it outputs a high-level signal and transmits it to the switch through a wire, and the switch correspondingly operates to disconnect the power supply, playing a role in protecting the battery pack.

[0015] Working principle:

[0016] In this utility model, a detection value for low voltage is set for the battery power detection unit through the PC. After turning on the power switch, the circuit operates normally. The battery power detection unit detects the power in real time. When the detected power is lower than the set detection value, the battery power detection unit will output a high-level signal. After the relay operates, the connection between the battery and the circuit is disconnected to protect the battery pack. When the device is in normal use, the battery will be charged according to requirements to ensure the battery power. Although it is unlikely, there may be situations such as missed charging or over-discharging. The low-voltage electrical protection circuit for the battery pack can effectively guarantee the service life of the battery pack and improve the equipment use efficiency.

[0017] This utility model has the following beneficial effects: simple circuit structure, convenient installation, and high safety. Description of the drawings

[0018] Appendix Figure 1 is the circuit schematic diagram of this utility model.

[0019] Battery pack 1, battery power detection unit 2, relay 3, load 4. Specific implementation manner

[0020] Through examples and in combination with the drawings, the technical solutions of this utility model are further specifically described.

[0021] Example: According to the appendix Figure 1 This utility model is further described. A low-voltage electrical protection circuit structure for a battery pack in this example includes a load 4 and a battery pack 1 that provides electrical energy for the load 4. A battery power detection unit 2 for detecting the health status of the battery pack 1 is provided between the battery pack 1 and the load 4. A power switch used in cooperation with the battery pack 1 is provided on the side of the battery power detection unit. The output end of the battery pack 1 is electrically connected to the power supply end of the battery power detection unit 2 and the power supply end of the power switch respectively. The signal output end of the battery power detection unit 2 is electrically connected to the signal receiving end of the power switch. The voltage output end of the battery power detection unit 2 is electrically connected to the load 4.

[0022] The power switch described above includes a relay 3. The left end of the switch within the relay 3 is electrically connected to the positive electrode of the battery pack 1. The right end of the switch within the relay 3 is electrically connected to the 1-pin of the power quantity detection unit 2. The left end of the coil within the relay 3 is electrically connected to the 4-pin of the power quantity detection unit 2. The right end of the coil within the relay 3 is electrically connected to the 3-pin of the power quantity detection unit 2.

[0023] The negative electrode of the battery pack 1 is electrically connected to the 2-pin of the power quantity detection unit 2.

[0024] The 5-pin of the power quantity detection unit 2 is electrically connected to one end of the load 4. The 6-pin of the power quantity detection unit 2 is electrically connected to the other end of the load 4.

[0025] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A low-voltage electrical protection circuit structure based on a battery pack, comprising a load (4) and a battery pack (1) for providing electrical energy to the load (4), characterized in that: A power detection unit (2) for detecting the health status of the battery pack (1) is provided between the battery pack (1) and the load (4); a power switch for use with the battery pack (1) is provided on the side of the power detection unit (2); the output end of the battery pack (1) is electrically connected to the power end of the power detection unit (2) and the power end of the power switch respectively; the signal output end of the power detection unit (2) is electrically connected to the signal receiving end of the power switch; and the voltage output end of the power detection unit (2) is electrically connected to the load (4).

2. The low voltage electrical protection circuit structure based on a battery pack according to claim 1 is characterized in that: The power switch comprises a relay (3), the left end of the switch in the relay (3) being electrically connected to the positive pole of the battery pack (1), the right end of the switch in the relay (3) being electrically connected to pin 1 of the power detection unit (2), the left end of the coil in the relay (3) being electrically connected to pin 4 of the power detection unit (2), and the right end of the coil in the relay (3) being electrically connected to pin 3 of the power detection unit (2).

3. The low voltage electrical protection circuit structure based on a battery pack according to claim 1 is characterized in that: The negative electrode of the battery pack (1) is electrically connected to pin 2 of the power detection unit (2).

4. The low voltage electrical protection circuit structure based on a battery pack according to claim 1 is characterized in that: Pin 5 of the power detection unit (2) is electrically connected to one end of the load (4), and pin 6 of the power detection unit (2) is electrically connected to the other end of the load (4).

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