Battery controller identification circuit and controller

Abstract

The utility model provides a battery controller identification circuit and a controller, the circuit comprises an enabling sub-circuit, a control sub-circuit and an output sub-circuit, the enabling sub-circuit comprises a first resistor, a second resistor and an N-type field effect transistor, and the control sub-circuit comprises a P-type field effect transistor, a third resistor and a fourth resistor. The output sub-circuit comprises a fifth resistor, a safety resistor and a voltage stabilizing capacitor, when a high-level signal is input into the input end, current sequentially passes through the first resistor and the second resistor to be grounded, during the period, the second resistor generates voltage drop, the N-type field effect transistor is switched on, and current of the reference power supply is grounded through the N-type field effect transistor; at the moment, the fourth resistor generates voltage drop to conduct the P-type field effect transistor, finally, the current passes through the output sub-circuit to output a signal, and at the moment, the controller receives a high-level signal; and when the input end is at a low level, the controller receives a low level signal, so that the circuit can ensure that the battery and the controller are uniquely identified, and the stability performance is relatively good.

Description

Technical Field

[0001] The present disclosure relates to a technical field, and in particular to a battery controller identification circuit and a controller. Background Art

[0002] With the development of new energy technology, lithium batteries have rapidly increased their usage in the global market due to their advantages of small size, high energy density, and high output power, becoming one of the representatives of new energy. With the increase in usage, the corresponding controllers are also diverse. The most common controllers are direct-connected, with P+ and P- directly connected to the controller input without any transfer identification control, resulting in the inability to control the matching between the battery and the controller, and the inability to provide further protection for anti-theft, encryption and other functions. In addition, this phenomenon also has certain defects. The controller does not match the battery power. When the battery power is too large and the controller power is too small, and protection is not possible, the controller will be damaged.

[0003] Therefore, there is a need for a battery controller identification circuit that can realize signal identification between the battery and the controller and has good stability performance. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a battery controller identification circuit and a controller that can realize signal identification between a battery and a controller and have good stability performance.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A battery controller identification circuit comprises an enabling subcircuit, a control subcircuit and an output subcircuit, wherein the enabling subcircuit comprises a first resistor, a second resistor and an N-type field effect transistor, wherein the gate of the N-type field effect transistor is connected to an input terminal through the first resistor, the gate of the N-type field effect transistor is also connected to a digital ground through the second resistor, and the source of the N-type field effect transistor is connected to the digital ground; the control subcircuit comprises a P-type field effect transistor, a third resistor and a fourth resistor, wherein the gate of the P-type field effect transistor is connected to a drain of the N-type field effect transistor through the third resistor, the gate of the P-type field effect transistor is also connected to a reference power supply through the fourth resistor, and the source of the P-type field effect transistor is connected to the reference power supply; the output subcircuit comprises a fifth resistor, a safety resistor and a voltage-stabilizing capacitor, wherein the drain of the P-type field effect transistor is respectively connected to the first end of the fifth resistor and the first end of the safety resistor, the second end of the fifth resistor is connected to a digital signal ground, the second end of the safety resistor is connected to the output terminal, the upper half end of the voltage-stabilizing capacitor is connected to the second end of the safety resistor, and the lower half end of the voltage-stabilizing capacitor is connected to the second end of the fifth resistor.

[0007] In one embodiment, the control subcircuit also includes a first protection diode, an anode of the first protection diode is connected to the first end of the third resistor, a second end of the third resistor is connected to the gate of the P-type field effect transistor, and a cathode of the first protection diode is connected to the drain of the N-type field effect transistor.

[0008] In one embodiment, the control subcircuit further includes a filter capacitor, an upper half of the filter capacitor is connected to the first end of the fourth resistor, and a lower half of the filter capacitor is connected to the second end of the fourth resistor.

[0009] In one embodiment, the output subcircuit further includes a second protection diode, the anode of the second protection diode is connected to the drain of the P-type field effect transistor, and the cathode of the second protection diode is respectively connected to the first end of the fifth resistor and the first end of the fuse resistor.

[0010] In one embodiment, the output subcircuit further includes a bidirectional transient voltage suppressor tube, a first end of the bidirectional transient voltage suppressor tube is connected to the upper half of the voltage stabilizing capacitor, and a second end of the bidirectional transient voltage suppressor tube is connected to the lower half of the voltage stabilizing capacitor.

[0011] In one embodiment, at least one of the first resistor and the second resistor is a variable resistor.

[0012] In one embodiment, at least one of the third resistor and the fourth resistor is a variable resistor.

[0013] In one embodiment, the fifth resistor is a variable resistor.

[0014] In one of the embodiments, the input end is a battery pack sending end, and the output end is an electronic controller end.

[0015] A controller comprises a controller body and a battery controller identification circuit as described in any one of the above embodiments, wherein the battery controller identification circuit is arranged inside the controller body.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] In the above-mentioned battery controller identification circuit, when a high-level signal is input to the input end, the current passes through the first resistor and the second resistor to the ground in sequence. During this period, the second resistor generates a voltage drop, turning on the N-type field effect tube, and the current of the reference power supply passes through the N-type field effect tube to the ground. At this time, the fourth resistor generates a voltage drop to turn on the P-type field effect tube. Finally, the current passes through the output subcircuit to output a signal, and the controller receives a high-level signal at this time; when the input end is at a low level, the controller receives a low-level signal. Such a circuit can ensure unique identification between the battery and the controller. By switching between the N-type field effect tube and the P-type field effect tube, it can prevent the external interface from directly contacting the IC pin and causing damage, thereby achieving better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a circuit diagram of a battery controller identification circuit in one embodiment;

[0020] Figure 2 for Figure 1 A circuit diagram of an enabling subcircuit in a battery controller identification circuit shown;

[0021] Figure 3 for Figure 1 The circuit diagram of the control subcircuit in the battery controller identification circuit shown;

[0022] Figure 4 for Figure 1 The circuit diagram of the output sub-circuit in the battery controller identification circuit is shown.

[0023] Figure numerals: 10, battery controller identification circuit; 100, enabling sub-circuit; 200, control sub-circuit; 300, output sub-circuit; RK49, first resistor; RK50, second resistor; RK48, third resistor; RK47, fourth resistor; RK51, fifth resistor; MK3, N-type field effect transistor; MK2, P-type field effect transistor; FK1, insurance resistor; CK9, filter capacitor; CK14, voltage stabilizing capacitor; DK14, first protection diode; DK13, second protection diode; ZK2, bidirectional transient voltage suppression tube; ECU_WAKE, input end; ECU_OUT, output end. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0028] See also Figures 1 to 4, which is a battery controller identification circuit 10 of an embodiment of the utility model, including an enabling subcircuit 100, a control subcircuit 200 and an output subcircuit 300, the enabling subcircuit 100 includes a first resistor RK49, a second resistor RK50 and an N-type field effect transistor MK3, the gate of the N-type field effect transistor MK3 is connected to the input terminal ECU_WAKE through the first resistor RK49, the gate of the N-type field effect transistor MK3 is also connected to the digital ground through the second resistor RK50, and the source of the N-type field effect transistor MK3 is connected to the digital ground; the control subcircuit 200 includes a P-type field effect transistor MK2, a third resistor RK48 and a fourth resistor RK47, the gate of the P-type field effect transistor MK2 is connected to the input terminal ECU_WAKE through the first resistor RK49, the gate of the N-type field effect transistor MK3 is also connected to the digital ground through the second resistor RK50, and the source of the N-type field effect transistor MK3 is connected to the digital ground; 8 is connected to the drain of the N-type field effect transistor MK3, the gate of the P-type field effect transistor MK2 is also connected to the reference power supply through the fourth resistor RK47, and the source of the P-type field effect transistor MK2 is connected to the reference power supply; the output sub-circuit 300 includes a fifth resistor RK51, a fuse resistor FK1 and a voltage-stabilizing capacitor CK14, the drain of the P-type field effect transistor MK2 is respectively connected to the first end of the fifth resistor RK51 and the first end of the fuse resistor FK1, the second end of the fifth resistor RK51 is connected to the digital signal ground, the second end of the fuse resistor FK1 is connected to the output terminal ECU_OUT, the upper half end of the voltage-stabilizing capacitor CK14 is connected to the second end of the fuse resistor FK1, and the lower half end of the voltage-stabilizing capacitor CK14 is connected to the second end of the fifth resistor RK51.

[0029] In this embodiment, when a high-level signal is input to the input terminal ECU_WAKE, the signal passes through the first resistor RK49 and the second resistor RK50 in sequence and is connected to the digital ground. At this time, a voltage drop is generated at both ends of the second resistor RK50, so that the gate voltage of the N-type field effect transistor MK3 is greater than the source voltage of the N-type field effect transistor MK3, thereby turning on the N-type field effect transistor MK3. The current of the reference power supply passes through the fourth resistor RK47, the third resistor RK48 and the N-type field effect transistor MK3 in sequence and is connected to the digital ground, and a voltage drop is generated at both ends of the fourth resistor RK47, so that the source voltage of the P-type field effect transistor MK2 is greater than the gate voltage of the P-type field effect transistor MK2, thereby turning on the P-type field effect transistor MK2. At this time, the current passes through the P-type field effect transistor MK3. After the tube MK2, it is connected to the digital signal ground through the fifth resistor RK51. The signal is output to the output terminal ECU_OUT after passing through the P-type field effect tube MK2 and the fuse resistor FK1. The controller receives a high-level signal, which is consistent with the high-level signal sent by the battery; when the input terminal ECU_WAKE has a low-level signal input, the first resistor RK49 and the second resistor RK50 have no current passing through, so that the conduction condition of the N-type field effect tube MK3 cannot be met and then shut down. The current of the reference power supply cannot pass through the N-type field effect tube MK3, so that a loop cannot be formed, and the P-type field effect tube MK2 is turned off. The output signal is pulled to a low level. At this time, the controller receives a low-level signal, which is consistent with the signal sent by the battery. Such a circuit can ensure unique identification between the battery and the controller. By switching the N-type field effect tube MK3 and the P-type field effect tube MK2, it can prevent the external interface from directly contacting the IC pin and causing damage, thereby achieving better stability performance.

[0030] In addition, when outputting a high-level signal, if the current is too large, the fuse in the fuse resistor FK1 blows to protect the circuit. A voltage-stabilizing capacitor CK14 is set so that the voltage-stabilizing capacitor CK14 is connected in parallel with the fifth resistor RK51, and the voltage-stabilizing capacitor CK14 is connected in series with the fuse resistor FK1, which can filter the signal and absorb static electricity, thereby avoiding damage to circuit components due to static electricity and causing circuit failure.

[0031] like Figure 1 and Figure 3As shown, in one embodiment, the control subcircuit 200 further includes a first protection diode DK14, the anode of the first protection diode DK14 is connected to the first end of the third resistor RK48, the second end of the third resistor RK48 is connected to the gate of the P-type field effect transistor MK2, and the cathode of the first protection diode DK14 is connected to the drain of the N-type field effect transistor MK3. Furthermore, when a high-level signal is input from the input terminal ECU_WAKE, the N-type field effect transistor MK3 is turned on, and the current of the reference power supply passes through the fourth resistor RK47, the third resistor RK48, the first protection diode DK14 and the N-type field effect transistor MK3 in sequence and then is grounded. During this period, the first protection diode DK14 ensures that the current flows in one direction to prevent the current from flowing back and damaging the circuit components.

[0032] like Figure 1 and Figure 3 As shown, in one embodiment, the control subcircuit 200 further includes a filter capacitor CK9, the upper half of the filter capacitor CK9 is connected to the first end of the fourth resistor RK47, and the lower half of the filter capacitor CK9 is connected to the second end of the fourth resistor RK47. It can be understood that the filter capacitor CK9 is connected in parallel with the fourth capacitor to form a resistor-capacitor parallel circuit (RC parallel circuit), which can play a role in signal filtering.

[0033] like Figure 1 and Figure 4 As shown, in one embodiment, the output subcircuit 300 further includes a second protection diode DK13, the anode of the second protection diode DK13 is connected to the drain of the P-type field effect transistor MK2, and the cathode of the second protection diode DK13 is respectively connected to the first end of the fifth resistor RK51 and the first end of the insurance resistor FK1. Further, when a high-level signal is input from the input terminal ECU_WAKE, the N-type field effect transistor MK3 is turned on, and the current of the reference power supply passes through the fourth resistor RK47, the third resistor RK48, the first protection diode DK14 and the N-type field effect transistor MK3 in sequence and then is grounded, and the fourth resistor RK47 generates a voltage drop to turn on the P-type field effect transistor MK2, and then the current of the reference power supply passes through the P-type field effect transistor MK2 and outputs a high-level signal, and the current passes through the second protection diode DK13 and flows through the fifth resistor RK51 to connect to the digital signal ground, and flows through the insurance resistor FK1 to output a high-level signal, during which the second protection diode DK13 can ensure that the current flows in one direction to prevent the current from flowing back and damaging the circuit elements.

[0034] like Figure 1 and Figure 4As shown, in one embodiment, the output subcircuit 300 also includes a bidirectional transient voltage suppressor tube ZK2, a first terminal of the bidirectional transient voltage suppressor tube ZK2 is connected to the upper half of the voltage stabilizing capacitor CK14, and a second terminal of the bidirectional transient voltage suppressor tube ZK2 is connected to the lower half of the voltage stabilizing capacitor CK14. It can be understood that the bidirectional transient voltage suppressor tube ZK2 is connected in parallel with the voltage stabilizing capacitor CK14, wherein the voltage stabilizing capacitor CK14 absorbs the static electricity generated in the circuit, and the bidirectional transient voltage suppressor tube ZK2 is used to suppress instantaneous overvoltage. The parallel connection of the two can effectively absorb static electricity and avoid static electricity damaging components to cause circuit failure.

[0035] In one embodiment, at least one of the first resistor RK49 and the second resistor RK50 is a variable resistor. Further, by adjusting the resistance ratio of the first resistor RK49 and the second resistor RK50, that is, adjusting the resistance of one or both of the first resistor RK49 and the second resistor RK50, the conduction condition of the N-type field effect transistor MK3 is adjusted to adapt to more models of N-type field effect transistors MK3.

[0036] In one embodiment, at least one of the third resistor RK48 and the fourth resistor RK47 is a variable resistor. Further, by adjusting the resistance ratio of the third resistor RK48 and the fourth resistor RK47, that is, adjusting the resistance of one or both of the third resistor RK48 and the fourth resistor RK47, the conduction condition of the P-type field effect transistor MK2 is adjusted to adapt to more models of P-type field effect transistors MK2.

[0037] In one embodiment, the fifth resistor RK51 is a variable resistor. Further, the fifth resistor RK51 is adjusted so that when the current passes through the fifth resistor RK51, the voltage is stabilized at a predetermined value to ensure the normal operation of the circuit. In this embodiment, the predetermined value is 4.3V.

[0038] In one of the embodiments, the input end ECU_WAKE is the battery pack transmitting end, and the output end ECU_OUT is the electronic controller end. Then, the battery pack sends a high-level signal. When input from the battery pack transmitting end, the N-type field effect transistor MK3 and the P-type field effect transistor MK2 are turned on successively, and then the ECU high-level signal is output from the electronic controller end, so that the high level recognized by the controller is consistent with the high level of the input signal; when a low-level signal is input from the battery pack transmitting end, both the N-type field effect transistor MK3 and the P-type field effect transistor MK2 cannot be turned on, and then the ECU low-level signal is output from the electronic controller end, so that the low level recognized by the controller is consistent with the low level of the input signal.

[0039] The present disclosure further provides a controller, comprising a controller body and a battery controller identification circuit 10 of any of the above embodiments, wherein the battery controller identification circuit 10 is disposed inside the controller body.

[0040] Compared with the prior art, the present invention has at least the following advantages:

[0041] In the above-mentioned battery controller identification circuit 10, when a high-level signal is input to the input terminal ECU_WAKE, the current passes through the first resistor RK49 and the second resistor RK50 to ground. During this period, the second resistor RK50 generates a voltage drop, turning on the N-type field effect transistor MK3. The current of the reference power supply passes through the N-type field effect transistor MK3 to ground. At this time, the fourth resistor RK47 generates a voltage drop to turn on the P-type field effect transistor MK2. Finally, the current passes through the output subcircuit 300 to output a signal. At this time, the controller receives a high-level signal; when the input terminal ECU_WAKE is low, the controller receives a low-level signal. Such a circuit can ensure unique identification between the battery and the controller. By switching the N-type field effect transistor MK3 and the P-type field effect transistor MK2, it can prevent the external interface from directly contacting the IC pin and causing damage, thereby achieving better stability.

[0042] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A battery controller identification circuit (10), characterized in that: include: An enabling subcircuit (100) comprises a first resistor (RK49), a second resistor (RK50) and an N-type field effect transistor (MK3), wherein the gate of the N-type field effect transistor (MK3) is connected to an input terminal (ECU_WAKE) via the first resistor (RK49), the gate of the N-type field effect transistor (MK3) is also connected to a digital ground via the second resistor (RK50), and the source of the N-type field effect transistor (MK3) is connected to the digital ground; A control subcircuit (200) comprises a P-type field effect transistor (MK2), a third resistor (RK48) and a fourth resistor (RK47), wherein the gate of the P-type field effect transistor (MK2) is connected to the drain of the N-type field effect transistor (MK3) via the third resistor (RK48), the gate of the P-type field effect transistor (MK2) is also connected to a reference power supply via the fourth resistor (RK47), and the source of the P-type field effect transistor (MK2) is connected to the reference power supply; The output subcircuit (300) comprises a fifth resistor (RK51), a fuse resistor (FK1) and a voltage-stabilizing capacitor (CK14); the drain of the P-type field effect transistor (MK2) is respectively connected to the first end of the fifth resistor (RK51) and the first end of the fuse resistor (FK1); the second end of the fifth resistor (RK51) is connected to a digital signal ground; the second end of the fuse resistor (FK1) is connected to an output end (ECU_OUT); the upper half end of the voltage-stabilizing capacitor (CK14) is connected to the second end of the fuse resistor (FK1); and the lower half end of the voltage-stabilizing capacitor (CK14) is connected to the second end of the fifth resistor (RK51).

2. The battery controller identification circuit (10) according to claim 1, characterized in that: The control subcircuit (200) also includes a first protection diode (DK14), the anode of the first protection diode (DK14) is connected to the first end of the third resistor (RK48), the second end of the third resistor (RK48) is connected to the gate of the P-type field effect transistor (MK2), and the cathode of the first protection diode (DK14) is connected to the drain of the N-type field effect transistor (MK3).

3. The battery controller identification circuit (10) according to claim 1, characterized in that: The control subcircuit (200) further comprises a filter capacitor (CK9), wherein an upper end of the filter capacitor (CK9) is connected to a first end of the fourth resistor (RK47), and a lower end of the filter capacitor (CK9) is connected to a second end of the fourth resistor (RK47).

4. The battery controller identification circuit (10) according to claim 1, characterized in that: The output subcircuit (300) also includes a second protection diode (DK13), the anode of the second protection diode (DK13) is connected to the drain of the P-type field effect transistor (MK2), and the cathode of the second protection diode (DK13) is respectively connected to the first end of the fifth resistor (RK51) and the first end of the fuse resistor (FK1).

5. The battery controller identification circuit (10) according to claim 1, characterized in that: The output subcircuit (300) further comprises a bidirectional transient voltage suppressor (ZK2), wherein a first end of the bidirectional transient voltage suppressor (ZK2) is connected to an upper end of the voltage stabilizing capacitor (CK14), and a second end of the bidirectional transient voltage suppressor (ZK2) is connected to a lower end of the voltage stabilizing capacitor (CK14).

6. The battery controller identification circuit (10) according to claim 1, characterized in that: At least one of the first resistor (RK49) and the second resistor (RK50) is a variable resistor.

7. The battery controller identification circuit (10) according to claim 1, characterized in that: At least one of the third resistor (RK48) and the fourth resistor (RK47) is a variable resistor.

8. The battery controller identification circuit (10) according to claim 1, characterized in that: The fifth resistor (RK51) is a variable resistor.

9. The battery controller identification circuit (10) according to claim 1, characterized in that: The input end (ECU_WAKE) is the battery pack sending end, and the output end (ECU_OUT) is the electronic controller end.

10. A controller, characterized in that: It comprises a controller body and a battery controller identification circuit (10) as described in any one of claims 1 to 9, wherein the battery controller identification circuit (10) is arranged inside the controller body.

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