Remote online capacity checking circuit for storage battery

Abstract

The utility model discloses a remote online capacity checking circuit for a storage battery, which belongs to the technical field of storage battery power supply and comprises a first port, a second port and a third port. A power supply is arranged between the first port and the third port; a battery pack to be subjected to capacity checking is arranged between the first port and the second port; a first branch, a second branch and a third branch are arranged in parallel between the second port and the third port; a high-frequency DC / DC battery pack booster circuit module is arranged on the first branch; the second branch is provided with a high-frequency DC / DC battery pack steady-current charging circuit module; a normally closed contactor KO is arranged on the third branch, and a diode DO is arranged on the normally closed contactor KO in parallel; a normally open contactor KM is arranged between the second port and the second branch and the third branch; and the first port is connected with the high-frequency DC / DC battery pack booster circuit module through a fourth branch provided with a normally open contactor KC. According to the utility model, the online capacity checking of the storage battery is completed through the high-frequency DC / DC battery pack booster circuit module.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery power supply, especially a battery remote online capacity checking circuit. BACKGROUND

[0002] The battery is the basic guarantee of the DC power supply system. The traditional battery charging and discharging operation is that the operation and maintenance personnel go to the scene to check the capacity of the battery by using the discharging device to carry out checking discharge experiment, so as to check whether the capacity of the battery is qualified. In order to better ensure the use safety of the discharging equipment and the normal operation of the on-site communication equipment, the operation and maintenance personnel must stay on the scene to observe the operation of the discharging equipment and the battery throughout the process, until the discharging ends and the battery returns to the normal working state, then the operation and maintenance personnel can leave the scene. The capacity checking experiment of the battery by using the traditional discharging device needs a lot of wiring work, and the capacity checking experiment is measured according to the operation steps, which consumes a long time, has high labor cost and has great safety risk. UTILITARY MODEL

[0003] The utility model needs to solve the technical problem of providing a battery remote online capacity checking circuit, which can complete the capacity checking of the battery through the high-frequency DC / DC battery pack boost circuit module, and is simple and fast.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A battery remote online capacity checking circuit, comprising a first port, a second port and a third port.

[0006] The first port and the third port are connected with the negative electrode and the positive electrode of the power supply respectively.

[0007] A battery pack to be checked for capacity is arranged between the first port and the second port, and the first port and the second port are connected with the negative electrode and the positive electrode of the battery pack to be checked for capacity respectively.

[0008] First, second and third branches are arranged in parallel between the second port and the third port. A high-frequency DC / DC battery pack boost circuit module is arranged on the first branch. A high-frequency DC / DC battery pack constant-current charging circuit module is arranged on the second branch. A normally closed contactor KO is arranged on the third branch, and a diode DO is arranged in parallel on the normally closed contactor KO. A normally open contactor KM is arranged between the second port and the second branch and the third branch. The first port and the high-frequency DC / DC battery pack boost circuit module are connected through a fourth branch, and a normally open contactor KC is arranged on the fourth branch.

[0009] Fifth and sixth branches are arranged in parallel between the first port and the third port. A rectifier is arranged on the fifth branch. A power consumption load is arranged on the sixth branch.

[0010] The further improvement of the technical scheme of the utility model lies in: when the to-be-tested capacity battery pack is 48V, the power supply is 53.5V.

[0011] Due to the adoption of the above technical scheme, the technical progress achieved by the utility model is:

[0012] 1. The utility model adopts the on-line dual power supply, and combines the rectifier, so that the battery power supply can be seamlessly switched.

[0013] 2. The utility model adopts the high-frequency DC / DC battery pack boost circuit module, and is controlled through the normally open contactor KC, so that the system operation is ensured not to be affected by the commercial power, and the power supply of the user load can be ensured uninterrupted after the commercial power is powered off.

[0014] 3. The utility model uses the actual load to replace the dummy load, so that energy-saving discharge can be realized, an additional load does not need to be externally connected, and the loss power is less than 5%. DRAWINGS

[0015] Figure 1 is the schematic diagram of the battery remote on-line capacity testing circuit in the utility model;

[0016] Among them, 1, the first port, 2, the second port, 3, the third port, 4, the to-be-tested capacity battery pack, 5, the high-frequency DC / DC battery pack boost circuit module, 6, the high-frequency DC / DC battery pack constant-current charging circuit module, 7, the rectifier, 8, the power load. DETAILED DESCRIPTION

[0017] The utility model will be further described in detail in combination with the drawings and examples:

[0018] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0019] In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "several" is at least two, such as two, three and the like, unless otherwise specifically limited.

[0020] As Figure 1 indicated, a battery remote online capacity checking circuit comprises a first port 1, a second port 2 and a third port 3;

[0021] The first port 1 and the third port 3 are respectively connected with a negative electrode of a power supply and a positive electrode of the power supply;

[0022] A battery group to be checked for capacity is arranged between the first port 1 and the second port 2, and the first port 1 and the second port 2 are respectively connected with a negative electrode of the battery group to be checked for capacity and a positive electrode of the battery group to be checked for capacity;

[0023] When the battery group to be checked for capacity is 48V, the power supply is 53.5V;

[0024] The second port 2 and the third port 3 are connected in parallel with a first branch, a second branch and a third branch; a high-frequency DC / DC battery group voltage boosting circuit module 5 is arranged on the first branch; a high-frequency DC / DC battery group constant current charging circuit module 6 is arranged on the second branch; a normally closed contactor KO is arranged on the third branch, and a diode DO is arranged in parallel on the normally closed contactor KO; a normally open contactor KM is arranged between the second port 2 and the second branch and the third branch; the first port 1 and the high-frequency DC / DC battery group voltage boosting circuit module 5 are connected through a fourth branch, and a normally open contactor KC is arranged on the fourth branch;

[0025] The first port 1 and the third port 3 are connected in parallel with a fifth branch and a sixth branch; a rectifier 7 is arranged on the fifth branch; and a user load 8 is arranged on the sixth branch.

[0026] Working principle:

[0027] 1. Battery capacity checking:

[0028] The capacity checking host can realize remote online capacity checking, remote control of charging and discharging, formulation of a maintenance plan, and automatic execution of charging and discharging of the battery group according to the plan; during the charging and discharging process, the capacity checking host monitors the battery in real time, monitors the battery voltage, current, internal resistance, temperature, soc and soh, checks the capacity of the battery, and grasps the health status of the battery in real time.

[0029] 2. Battery charging and discharging:

[0030] Charging state: KO is closed, KM is disconnected, the battery is directly online, and the rectifier 7 directly charges the battery in a floating state;

[0031] Discharging state: KO is disconnected, KM and KC are closed, the battery is boosted to be higher than the voltage of the rectifier 7 through the high-frequency DC / DC battery group voltage boosting circuit module 5, so as to replace the rectifier 7 to supply power to the user load.

[0032] In summary, the technical problem to be solved by the utility model is to provide a battery remote online capacity checking circuit, which can complete capacity checking of the battery through a high-frequency DC / DC battery pack boosting circuit module, thereby saving time and effort.

Claims

1. A battery remote on-line capacity determination circuit, characterized by: It comprises a first port (1), a second port (2) and a third port (3); The first port (1) and the third port (3) are connected with the negative pole and the positive pole of the power supply respectively; A to-be-inspected capacity battery pack (4) is arranged between the first port (1) and the second port (2), and the first port (1) and the second port (2) are connected with the negative pole and the positive pole of the to-be-inspected capacity battery pack (4) respectively; A first branch, a second branch and a third branch are arranged in parallel between the second port (2) and the third port (3); a high-frequency DC / DC battery pack voltage-boosting circuit module (5) is arranged on the first branch; a high-frequency DC / DC battery pack constant-current charging circuit module (6) is arranged on the second branch; a normally closed contactor KO is arranged on the third branch, and a diode DO is arranged in parallel on the normally closed contactor KO; a normally open contactor KM is arranged between the second port (2) and the second branch and the third branch; the first port (1) is connected with the high-frequency DC / DC battery pack voltage-boosting circuit module (5) through a fourth branch, and a normally open contactor KC is arranged on the fourth branch; A fifth branch and a sixth branch are arranged in parallel between the first port (1) and the third port (3); a rectifier (7) is arranged on the fifth branch; and a power consumption load (8) is arranged on the sixth branch.

2. The battery remote on-line state-of-charge circuit of claim 1, wherein: When the to-be-inspected capacity battery pack (4) is 48V, the power supply is 53.5V.

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