Starting control circuit of energy storage battery system

Abstract

The utility model discloses a start control circuit of an energy storage battery system. The start control circuit comprises a battery module, a circuit breaker, a total positive relay, a total negative relay, a DC-DC power supply module, a BMS board and a battery output terminal strip. And one end of the key switch is connected in parallel with the positive electrode of the voltage output end of the DC-DC power supply module, and the other end of the key switch is connected with a voltage detection pin of the BMS board. According to the utility model, the battery output terminal strip is conducted with the battery module through the key switch to provide starting electric energy for the inverter, so that the inverter is normally started, and the started inverter continuously sends an activation instruction in reverse, so that the battery is kept in a normal starting state, and the use requirements under special working conditions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery systems, in particular to a start-up control circuit of an energy storage battery system. Background Art

[0002] With the development of new energy, household energy storage systems are widely used. Household energy storage systems are composed of photovoltaics, power grids, inverters and batteries. Batteries can be charged by solar energy or power grids, or the electricity from batteries can be sold to the power grid or used by the user. Batteries are an important part of household energy storage systems. Batteries are divided into high voltage and low voltage, which are used in different scenarios.

[0003] The battery in household high-voltage energy storage has a higher voltage and stores more electricity. It is a dangerous item. Whether in transportation or use, you must pay great attention to safety to avoid dangerous accidents. Therefore, the battery itself has a protection system. Under normal circumstances, the normal start-up of the battery requires two conditions: one is that the battery switch is turned on, and the other is that the inverter actively sends an activation command to communicate with the battery. When these two conditions are met at the same time, the battery can be used normally.

[0004] However, there are always some working conditions that make the second condition not met during the user's use. The inverter must be powered on first before sending the activation command to activate the battery. However, in areas where photovoltaic energy is insufficient but there is no power grid, this will cause such a problem. The inverter needs to be powered on first to activate the battery discharge, and the battery needs to receive the activation command to power the inverter, which is trapped in an endless loop.

[0005] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to provide a starting control circuit for an energy storage battery system in view of the deficiencies in the prior art, which can normally start the battery when the battery has no external communication and supply power to an external inverter.

[0007] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0008] A start-up control circuit for an energy storage battery system includes a battery module, a circuit breaker, a total positive relay, a total negative relay, a DC-DC power supply module, a BMS board, and a battery output terminal block;

[0009] The positive electrode of the battery module is connected in parallel with one end of the normally open contact of the total positive relay and the positive electrode of the voltage input terminal of the DC-DC power module through the circuit breaker, and its negative electrode is connected in parallel with one end of the normally open contact of the total negative relay and the negative electrode of the voltage input terminal of the DC-DC power module, the other end of the normally open contact of the total positive relay is connected to the positive electrode of the battery output terminal row, the other end of the normally open contact of the total negative relay is connected to the negative electrode of the battery output terminal row, the two ends of the coil of the total positive relay are correspondingly connected to the positive and negative pins of the first drive signal terminal of the BMS board, the two ends of the coil of the total negative relay are correspondingly connected to the positive and negative pins of the second drive signal terminal of the BMS board, and the positive and negative electrodes of the voltage output terminal of the DC-DC power module are correspondingly connected to the positive and negative pins of the power supply terminal of the BMS board;

[0010] It also includes a key switch, one end of which is connected in parallel to the positive pole of the voltage output end of the DC-DC power supply module, and the other end of which is connected to the voltage detection pin of the BMS board.

[0011] In a preferred embodiment of the present invention, the key switch is a normally open self-resetting key switch.

[0012] In a preferred embodiment of the present utility model, the normally open self-reset push button switch adopts a red insulating button structure.

[0013] In a preferred embodiment of the utility model, it also includes a light emitting diode and a stabilizing resistor, one end of the stabilizing resistor is connected to the voltage output pin of the BMS board, and the other end is connected to the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is connected in parallel to the negative electrode of the battery module.

[0014] In a preferred embodiment of the present invention, the battery module is a lithium battery module.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] 1. The utility model uses a key switch to connect the battery output terminal row with the battery module, providing starting power for the inverter, so that the inverter starts normally. After starting, the inverter continues to send activation instructions, so that the battery maintains a normal starting state, meeting the use requirements under special working conditions;

[0017] 2. The utility model also adds a light-emitting diode to facilitate users to understand the current startup status;

[0018] 3. The utility model has only one red insulated button on the outside, and the internal connection is tight and the insulation is high, which can greatly protect the safety of the user during operation.

[0019] 4. The utility model needs to continuously press the button switch to start, and the pressing time is 10s, which not only effectively prevents accidental touch, but also allows non-technical personnel to operate under remote guidance, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0023] See also Figure 1 The figure shows a start-up control circuit of an energy storage battery system, including a battery module 100, a circuit breaker Q, a total positive relay KM1, a total negative relay KM2, a DC-DC power module 200, a BMS board 300, a battery output terminal block 400, a key switch S, a light emitting diode D and a voltage stabilizing resistor R.

[0024] The battery module 100 preferably adopts a lithium battery, the positive electrode of which is connected in parallel with one end of the normally open contact of the total positive relay KM1 and the positive electrode of the voltage input terminal of the DC-DC power module 200 through the circuit breaker Q, and the negative electrode of which is connected in parallel with one end of the normally open contact of the total negative relay KM2 and the negative electrode of the voltage input terminal of the DC-DC power module 200, the other end of the normally open contact of the total positive relay KM1 is connected to the positive electrode of the battery output terminal block 400, and the other end of the normally open contact of the total negative relay KM2 is connected to the positive electrode of the battery output terminal block 400. The positive and negative poles of the voltage output terminal of the DC-DC power module 200 are connected to the positive pole of the voltage output terminal of the DC-DC power module 200, and the other end thereof is connected to the voltage detection pin DIN1 of the BMS board 300. In this embodiment, the key switch S preferably adopts a normally open self-reset key switch, and the normally open self-reset key switch adopts a red insulating button structure. One end of the voltage-stabilizing resistor R is connected to the voltage output pin RL6 of the BMS board 300 , and the other end thereof is connected to the anode of the light-emitting diode D. The cathode of the light-emitting diode D is connected in parallel to the cathode of the battery module 100 .

[0025] The working principle of the energy storage battery system startup control circuit of the utility model is as follows:

[0026] When the circuit breaker Q is turned on, the voltage of the battery module 100 will be input to the DC-DC power module 200, and the 24V voltage output by the DC-DC power module 200 will be connected to the pins P+ and P- of the BMS board 300 to power the BMS board 300; when the BMS board 300 is started, due to the lack of communication with the external inverter, the pins RL2+, RL2- and the pins RL4+, RL4- of the BMS board 300 will not output drive signals, the main positive relay KM1 and the main negative relay KM2 will not be closed, and the battery output terminal block 400 will not be energized.

[0027] When the push switch S is pressed, the pin DIN1 of the BMS board 300 will detect the 24V input level, the pin RL6 of the BMS board 300 will output voltage, and the red LED light on the light-emitting diode D will light up. If the black start switch is continuously pressed, the LED light will enter the red flashing state. The BMS board 300 must continuously detect the 24V level for about 10s before the pins RL2+, RL2- and the pins RL4+, RL4- of the BMS board 300 will respectively output 12V voltage to drive the total positive relay KM1 and the total negative relay KM2 to close, so that the battery output terminal row 400 is connected to the battery module 100, providing starting power for the inverter, so that the inverter starts normally. After starting, the inverter in turn continuously sends activation instructions, so that the battery maintains a normal starting state to meet the usage requirements under special working conditions.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A start-up control circuit for an energy storage battery system, comprising a battery module, a circuit breaker, a total positive relay, a total negative relay, a DC-DC power supply module, a BMS board and a battery output terminal block; The positive electrode of the battery module is connected in parallel with one end of the normally open contact of the total positive relay and the positive electrode of the voltage input terminal of the DC-DC power module through the circuit breaker, and its negative electrode is connected in parallel with one end of the normally open contact of the total negative relay and the negative electrode of the voltage input terminal of the DC-DC power module, the other end of the normally open contact of the total positive relay is connected to the positive electrode of the battery output terminal row, the other end of the normally open contact of the total negative relay is connected to the negative electrode of the battery output terminal row, the two ends of the coil of the total positive relay are correspondingly connected to the positive and negative pins of the first drive signal terminal of the BMS board, the two ends of the coil of the total negative relay are correspondingly connected to the positive and negative pins of the second drive signal terminal of the BMS board, and the positive and negative electrodes of the voltage output terminal of the DC-DC power module are correspondingly connected to the positive and negative pins of the power supply terminal of the BMS board; characterized in that It also includes a key switch, one end of which is connected in parallel to the positive pole of the voltage output end of the DC-DC power supply module, and the other end of which is connected to the voltage detection pin of the BMS board.

2. The energy storage battery system startup control circuit according to claim 1, characterized in that: The key switch is a normally open self-resetting key switch.

3. The energy storage battery system startup control circuit according to claim 2, characterized in that: The normally open self-resetting push button switch adopts a red insulating button structure.

4. The energy storage battery system startup control circuit according to claim 2, characterized in that: It also includes a light emitting diode and a voltage stabilizing resistor, one end of the voltage stabilizing resistor is connected to the voltage output pin of the BMS board, and the other end is connected to the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is connected to the negative electrode of the battery module in parallel.

5. The energy storage battery system startup control circuit according to claim 1, characterized in that: The battery module is a lithium battery module.

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