Control circuit compatible with input of different types of batteries

Abstract

The utility model relates to the technical field of control circuits, in particular to a control circuit compatible with different types of battery inputs, which comprises a triode Q4, a relay RY1, a resistor R15, a resistor R13, a transformer T1, a capacitor C1 and a rectifier bridge D2, the collector of the triode Q4 is connected with the first pin of the relay RY1, the emitter of the triode Q4 is grounded, the first pin of the relay RY1 is connected with the second pin of the relay RY1, the second pin of the relay RY1 is connected with the resistor R15 and the resistor R13, and the resistor R15 and the resistor R13 are connected with the transformer T1. A third pin and a fourth pin of the relay RY1 are connected with the transformer T1, a fifth pin of the relay RY1 is connected with the rectifier bridge D2, the capacitor C1 is connected between the transformer T1 and the rectifier bridge D2, and the fifth pin of the relay RY1 is connected with or disconnected from the third pin and connected with or disconnected from the fourth pin. The control circuit can be compatible with two different battery inputs, and after the control circuit passes through, the input voltage is within the same voltage range for the next-stage inverter circuit, and the 220V inverter voltage output can be realized; inverter output can be met without adding a primary circuit topology, and the output conversion efficiency of the whole machine is high.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, and in particular to a control circuit compatible with different types of battery inputs. Background Art

[0002] With the rapid development of portable energy storage today, compatibility with a variety of different battery input types is often required. Different battery types have varying input voltages. To accommodate these diverse inputs, a common approach is to incorporate a boost topology, which achieves a uniform output voltage after a boost circuit. This approach requires a three-stage topology for inverter output. However, this approach has significant drawbacks. First, the addition of an additional stage increases costs. Second, the overall efficiency of the system plummets.

[0003] Therefore, designing a control circuit that is compatible with different types of battery inputs is an inevitable requirement for portable energy storage companies. Utility Model Content

[0004] In order to overcome the defects of the prior art, the purpose of the present invention is to provide a control circuit that is compatible with different types of battery inputs, aiming to solve the problem of high cost of the existing control circuit.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a control circuit compatible with different types of battery inputs, including a transistor Q4, a relay RY1, a resistor R15, a resistor R13, a transformer T1, a capacitor C1 and a rectifier bridge D2, the collector of the transistor Q4 is connected to pin 1 of the relay RY1, and the emitter is grounded, pin 1 of the relay RY1 is connected to pin 2, pin 2 of the relay RY1 is connected to resistor R15 and resistor R13, pins 3 and 4 of the relay RY1 are connected to the transformer T1, pin 5 of the relay RY1 is connected to the rectifier bridge D2, the capacitor C1 is connected between the transformer T1 and the rectifier bridge D2, and pin 5 of the relay RY1 is energized or disconnected with pin 3, and energized or disconnected with pin 4.

[0006] Preferably, the circuit is used for 16 strings of lithium iron phosphate batteries or 20 strings of lithium iron phosphate batteries.

[0007] Preferably, when the circuit uses 16 strings of lithium iron phosphate batteries, the input voltage range is 40.5V to 58.4V, and when the circuit uses 20 strings of lithium iron phosphate batteries, the input voltage range is 51V to 73V.

[0008] Preferably, the base of the transistor Q4 is connected to a RELAY signal terminal, and the RELAY signal terminal sends a high level or a low level.

[0009] Preferably, the base of the transistor Q4 is further connected to a resistor R16, a resistor R17 and a capacitor C22.

[0010] Preferably, a diode D5 and a resistor R11 are connected in series to the resistor R15 and the resistor R13, and one end of the resistor R11 is connected to the collector of the transistor Q4.

[0011] Preferably, the model of the rectifier bridge D2 is GBJ1506E50.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a control circuit compatible with different types of battery inputs, which can be compatible with two different battery inputs. After the control circuit is used, the input voltage of the subsequent inverter circuit is within an equal voltage range, and a 220V inverter voltage output can be achieved; there is no need to increase the circuit topology to meet the inverter output, and the output conversion efficiency of the whole machine is high; the circuit can also automatically identify different types of battery inputs, with a simple principle, no need for cumbersome processes, and a high degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the attached figure:

[0015] Figure 1 This is a schematic diagram of a control circuit compatible with different types of battery inputs in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is apparent that the embodiments described are only a portion of the embodiments of the utility model, not all of them. The embodiments and features in the embodiments of this application may be combined with each other unless there is a conflict. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the utility model without creative effort are also within the scope of protection of the utility model.

[0017] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0018] In addition, "multiple" means more than two. Furthermore, the technical solutions of the various embodiments may be combined with each other, but this must be based on the premise that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually inconsistent or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0019] Please refer to the instruction manual Figure 1The utility model provides a control circuit compatible with different types of battery inputs, including a transistor Q4, a relay RY1, a resistor R15, a resistor R13, a transformer T1, a capacitor C1 and a rectifier bridge D2. The collector of the transistor Q4 is connected to pin 1 of the relay RY1, and the emitter is grounded. Pins 1 and 2 of the relay RY1 are connected, and pin 2 of the relay RY1 is connected to the resistor R15 and the resistor R13. Pins 3 and 4 of the relay RY1 are connected to the transformer T1, and pin 5 of the relay RY1 is connected to the rectifier bridge D2. The capacitor C1 is connected between the transformer T1 and the rectifier bridge D2. Pin 5 of the relay RY1 is connected to or disconnected with pin 3, and connected to or disconnected with pin 4. The base of the transistor Q4 is also connected to resistors R16, R17 and capacitor C22. The model of the rectifier bridge D2 is GBJ1506E50; the resistors R15 and R13 are further connected in series with a diode D5 and a resistor R11, and one end of R11 is connected to the collector of the transistor Q4.

[0020] This control circuit has a wide range of applications, including portable energy storage and power supply applications. Specifically, it is used in portable energy storage inverters. This circuit is compatible with either 16 or 20 lithium iron phosphate battery strings. When using 16 lithium iron phosphate battery strings, the input voltage range is 40.5V to 58.4V; when using 20 lithium iron phosphate battery strings, the input voltage range is 51V to 73V.

[0021] The base of transistor Q4 in this control circuit is connected to the RELAY signal terminal, which can generate either a high or low level. When the RELAY signal terminal is high, transistor Q4 conducts, grounding pin 1 of relay RY1. A 12V voltage flows through resistors R15 and R13 to power relay RY1. Pins 5 and 3 of relay RY1 are closed, while pins 5 and 4 are disconnected. The switching ratio of transformer T1 becomes 3:25, and the output voltage, after passing through capacitor C1 and rectifier bridge D2, ranges from 337.5V to 486.7V. When the RELAY signal terminal is low, transistor Q4 turns off, disconnecting pin 1 of relay RY1 from ground. The 12V voltage cannot return to ground after passing through resistors R15 and R13, preventing it from powering relay RY1. Pins 5 and 4 of relay RY1 are closed, while pins 5 and 3 are disconnected. The transformer's switching ratio becomes 3:20, and the output voltage, after being rectified by capacitor C1 and bridge rectifier D2, reaches a range of 340V to 486.7V. Therefore, this control circuit is compatible with two different battery inputs. With this circuit, the input voltages of the subsequent inverter circuit remain within the same voltage range, achieving a 220V inverter output.

[0022] The control circuit of the utility model also has the following characteristics:

[0023] The circuit uses a small number of components and circuit topologies, and has low cost. It can meet the inverter output without adding a level of circuit topology. The output conversion efficiency of the whole machine is high, and it can automatically identify different types of battery inputs. The implementation principle is simple, does not require cumbersome processes, and is very intelligent.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control circuit compatible with different types of battery inputs, characterized in that: It includes a transistor Q4, a relay RY1, a resistor R15, a resistor R13, a transformer T1, a capacitor C1 and a rectifier bridge D2. The collector of the transistor Q4 is connected to pin 1 of the relay RY1, and the emitter is grounded. Pin 1 and pin 2 of the relay RY1 are connected, and pin 2 of the relay RY1 is connected to resistor R15 and resistor R13. Pin 3 and pin 4 of the relay RY1 are connected to the transformer T1. Pin 5 of the relay RY1 is connected to the rectifier bridge D2. The capacitor C1 is connected between the transformer T1 and the rectifier bridge D2. Pin 5 of the relay RY1 is connected to or disconnected with pin 3, and connected to or disconnected with pin 4.

2. The control circuit compatible with different types of battery inputs according to claim 1, characterized in that: This circuit is used for 16 strings of lithium iron phosphate batteries or 20 strings of lithium iron phosphate batteries.

3. The control circuit compatible with different types of battery inputs according to claim 2, characterized in that: When the circuit uses 16 lithium iron phosphate batteries in series, the input voltage range is 40.5V to 58.4V. When the circuit uses 20 lithium iron phosphate batteries in series, the input voltage range is 51V to 73V.

4. The control circuit compatible with different types of battery inputs according to claim 1, characterized in that: The base of the transistor Q4 is connected to the RELAY signal terminal, and the RELAY signal terminal sends a high level or a low level.

5. The control circuit compatible with different types of battery inputs according to claim 1, characterized in that: The base of the transistor Q4 is further connected to a resistor R16, a resistor R17 and a capacitor C22.

6. The control circuit compatible with different types of battery inputs according to claim 1, characterized in that: The resistor R15 and the resistor R13 are further connected in series with a diode D5 and a resistor R11 , and one end of the resistor R11 is connected to the collector of the transistor Q4 .

7. The control circuit compatible with different types of battery inputs according to claim 1, characterized in that: The model of the rectifier bridge D2 is GBJ1506E50.

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