High-voltage interlocking detection circuit and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a high-voltage interlocking detection circuit and a vehicle, the circuit comprises a detection assembly and a multi-stage series assembly, one end of the multi-stage series assembly is respectively connected with a preset voltage source and the detection assembly, and the other end of the multi-stage series assembly is grounded. Each stage of series assembly is provided with a path of interlocking connection port; the detection assembly is used for obtaining the voltage value between the two ends of each stage of series assembly, and obtaining the whole vehicle interlocking result according to the sum value of the voltage values between the two ends of each stage of series assembly and the state of the interlocking connection port corresponding to each stage of series assembly. Therefore, the problem that the fault of the whole vehicle is misreported due to the detection difference of the analog voltage caused by the series connection of the resistors in the detection circuit for the high-voltage interlocking of the electric vehicle device in the prior art is solved, the fault identification requirement is met under the condition that the design cost is not changed, the resolution of the sampling voltage is improved, and the reliability of the detection circuit is improved. Therefore, the accuracy of vehicle high-voltage interlocking detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a high-voltage interlock detection circuit and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, high-voltage battery systems have become an indispensable component. However, high-voltage battery systems also bring certain safety risks. In order to ensure the safety performance of new energy vehicles, high-voltage battery systems need to undergo strict interlock testing.

[0003] In the related technology, PDU (Power Distribution Unit) products usually involve 4 to 6 high-voltage interlock signal detections, such as slow charging interfaces, battery interfaces, etc. These signals are generally sampled through the AD (Analog to Digital Converte) sampling port of the digital signal processing chip (Digital Signal Processing, referred to as DSP) in the PDU. When there are fewer detection signals, each signal can occupy one AD sampling port. However, when there are more signals, in order to reduce the resources occupied by the AD sampling port of the DSP, suppliers usually connect two interlock signals through series resistors, and judge the connection status of the interlock terminals by identifying different sampling voltages.

[0004] However, the high-voltage interlock detection circuit in the related art may cause false fault alarms in the entire vehicle due to the detection difference of the analog voltage caused by the series connection of resistors. Its sampling resolution is low and it cannot accurately identify high-voltage interlock faults, which urgently needs to be solved. Utility Model Content

[0005] The utility model provides a high-voltage interlock detection circuit and a vehicle to solve the problem that in the related art, the detection circuit of the high-voltage interlock of electric vehicle devices has a detection difference in analog voltage caused by series resistors, which leads to false fault alarms in the whole vehicle. Under the condition of unchanged design cost, the fault identification requirements are met, the resolution of the sampling voltage is improved, and the accuracy of the vehicle high-voltage interlock detection is improved.

[0006] The first aspect of the utility model provides a high-voltage interlock detection circuit, comprising: a detection component and a multi-stage series component, wherein:

[0007] One end of the multi-stage series assembly is connected to a preset voltage source and the detection assembly respectively, the other end of the multi-stage series assembly is grounded, and each stage of the series assembly is provided with an interlocking connection port;

[0008] The detection component is used to obtain the voltage value between the two ends of each series component, and obtain the vehicle interlocking result according to the sum of the voltage values ​​between the two ends of each series component and the state of the interlocking connection port corresponding to each series component.

[0009] Optionally, the multi-stage series assembly includes a first series assembly and a second series assembly, wherein the first series assembly includes:

[0010] a first diode, wherein an anode of the first diode is connected to the preset voltage source and the detection component respectively, and a cathode of the first diode serves as a first sub-port of an interlocking connection port corresponding to the first series component;

[0011] a first triode, wherein the emitter of the first triode is connected to the anode of the first diode, and the base of the first triode serves as a second sub-port of the interlocking connection port corresponding to the first series component;

[0012] A first voltage stabilizing diode, wherein the cathode of the first voltage stabilizing diode is connected to the emitter of the first transistor, and the anode of the first voltage stabilizing diode is respectively connected to the collector of the first transistor and the second series assembly.

[0013] Optionally, the first triode is a PNP (PNP type triode) triode.

[0014] Optionally, the second series connection component comprises:

[0015] a second diode, wherein an anode of the second diode is connected to the collector of the first triode, and a cathode of the second diode serves as a first sub-port of the interlock connection port corresponding to the second series component;

[0016] a second triode, wherein the emitter of the second triode is connected to the anode of the second diode, the base of the second triode serves as a second sub-port of the interlock connection port corresponding to the second series component, and the collector of the second triode is grounded;

[0017] A second voltage stabilizing diode, wherein a cathode of the second voltage stabilizing diode is connected to an emitter of the second transistor, and an anode of the second voltage stabilizing diode is connected to a collector of the second transistor.

[0018] Optionally, the second transistor is a PNP transistor.

[0019] Optionally, the high-voltage interlock detection circuit further includes: a resistor, one end of which is connected to the preset voltage source, and the other end of which is connected to one end of the multi-stage series component.

[0020] Optionally, the high-voltage interlock detection circuit further includes: a display component, the display component is connected to the detection component, and the display component is used to display the vehicle interlock result.

[0021] Optionally, the high-voltage interlock detection circuit further includes: a reminder component, which is connected to the detection component and is used to issue a reminder of the vehicle interlock result.

[0022] Optionally, the preset voltage source is a direct current power supply.

[0023] A second aspect of the utility model provides a vehicle, comprising the high-voltage interlock detection circuit as described above.

[0024] Therefore, the utility model uses a high-voltage interlock detection circuit composed of a detection component and a multi-stage series component to connect one end of the multi-stage series component to a preset voltage source and a detection component respectively, and each stage of the series component is provided with an interlock connection port, and uses the detection component to obtain the voltage value between the two ends of each stage of the series component, and obtains the vehicle interlock result according to the sum of the voltage values ​​between the two ends of each stage of the series component and the state of the interlock connection port corresponding to each stage of the series component. The utility model forms a sampling voltage circuit similar to a digital signal through a combination circuit design of a triode, a diode and a voltage regulator tube, thereby solving the problem that the detection circuit of the high-voltage interlock of electric vehicle devices in the related art causes the detection difference of the analog voltage caused by the series connection of resistors, resulting in the false alarm of the whole vehicle fault, etc., and meets the fault identification requirements without changing the design cost, and improves the resolution of the sampling voltage, thereby improving the accuracy of the vehicle high-voltage interlock detection.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is a schematic diagram of a series interlock detection circuit and different states in the related technology of the utility model;

[0028] Figure 2 A schematic diagram of a high voltage interlock detection circuit provided according to an embodiment of the utility model;

[0029] Figure 3 It is a principle schematic diagram of a high voltage interlock detection circuit according to a specific embodiment of the utility model;

[0030] Figure 4A schematic diagram of an optimization scheme for a series interlock detection circuit according to a specific embodiment of the utility model;

[0031] Figure 5 The present invention is a block diagram of a vehicle provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following describes the high-voltage interlock detection circuit and vehicle of the utility model embodiment with reference to the accompanying drawings. Aiming at the problem that the detection circuit of the high-voltage interlock of the electric vehicle device mentioned in the above background technology causes the detection difference of the analog voltage brought by the series connection of the resistor, which leads to the fault false alarm of the whole vehicle, the utility model provides a high-voltage interlock detection circuit, which includes: a detection component and a multi-stage series component, wherein one end of the multi-stage series component is respectively connected to the preset voltage source and the detection component, the other end of the multi-stage series component is grounded, and each stage of the series component is provided with an interlock connection port; the detection component is used to obtain the voltage value between the two ends of each stage of the series component, and obtain the interlock result of the whole vehicle according to the sum of the voltage value between the two ends of each stage of the series component and the state of the interlock connection port corresponding to each stage of the series component. Thus, the problem that the detection circuit of the high-voltage interlock of the electric vehicle device causes the fault false alarm of the whole vehicle due to the detection difference of the analog voltage brought by the series connection of the resistor in the related technology is solved, and the fault identification requirements are met under the condition that the design cost remains unchanged, and the resolution of the sampling voltage is improved, thereby improving the accuracy of the vehicle high-voltage interlock detection.

[0033] Before introducing the high-voltage interlock detection circuit of the embodiment of the present utility model, a high-voltage interlock detection circuit in the related art is briefly described first.

[0034] Specifically, Figure 1 Schematic diagram of the series interlock detection circuit and different states in the related technology of the utility model, such as Figure 1 As shown in (1) to (5), A is one interlocking connection port, B is another interlocking connection port, R1, R2, and R3 are series circuit resistors, V1 to V5 are sampling port sampling voltages, and DC is the power supply. When the high-voltage connector and the interlocking connection terminal are connected normally, the interlocking interface forms a short circuit; when the high-voltage connector and the interlocking connection terminal are not connected, the interlocking interface is open; when there is an abnormality in the high-voltage connector, a certain resistance Rx is formed between the interlocking terminals.

[0035] Figure 1 (1) to (5) in the figure respectively represent circuit diagrams of different interlocking connections, and Table 1 shows typical states of different interlocking connections in the related art.

[0036] Table 1

[0037]

[0038] The calculation method of each sampling voltage is as follows:

[0039] exist Figure 1 In (1), A is open, B is open, and the sampling voltage V1 = VDC × R2 / (R1+R2+R3);

[0040] exist Figure 1 In (4), A is short-circuited, B is short-circuited, and the sampling voltage V4 = V DC ×R3 / (R1+R3), the other situations are similar and will not be elaborated here.

[0041] When the A and B terminals are connected, but there is an abnormal resistance value in the connection (between open circuit and short circuit), V5 = V DC ×Ry / (R1+Ry+R3), where Ry=R2×Rx / (R2+Rx). The theoretical and practical application data show that there is an abnormal situation of reporting interlock fault at this time.

[0042] Assume R1=51kΩ, R2=20kΩ, R3=10kΩ, Rx=20kΩ, V DC =3.3v, according to Figure 1 As shown in (1) to (5), the sample voltage can be calculated to obtain V5 = 0.54V, and for Figure 1 (2), the theoretical calculated value is V2 = 0.54V, from which we can see that Figure 1 (1)~ Figure 1 In the case of abnormal connection in (5), since the sampled voltage is the same as the voltage value of the corresponding state of V2, it will be identified as state 2 in Table 1, that is, A is normal and B is interlocked. However, the actual state at this time is A interlocked abnormally and B interlocked normally.

[0043] In summary, due to the uncertainty of Rx, the PDU incorrectly identifies the interlocking state, which leads to a false fault report of the entire vehicle. Therefore, in order to solve the above problems, the utility model proposes a high-voltage interlock detection circuit without increasing costs and seeking minimal changes to the product. The circuit effectively solves the defect that the PDU incorrectly identifies the high-voltage interlocking state and cannot fully and accurately report the fault, and the voltage recognition resolution is also significantly improved.

[0044] Specific embodiments and drawings are listed below to illustrate the structure and principle of the high-voltage interlock detection circuit of the present utility model.

[0045] Specifically, Figure 2 A schematic diagram of a high voltage interlock detection circuit provided by an embodiment of the utility model.

[0046] like Figure 2 As shown, the high-voltage interlock detection circuit 10 includes: a detection component 100 and a multi-stage series component 200 .

[0047] Among them, one end of the multi-stage series component 200 is respectively connected to the preset voltage source DC and the detection component 100, the other end of the multi-stage series component 200 is grounded, and each stage of the series component is provided with an interlocking connection port; the detection component 100 is used to obtain the voltage value between the two ends of each stage of the series component, and obtain the vehicle interlocking result according to the sum of the voltage values ​​between the two ends of each stage of the series component and the state of the interlocking connection port corresponding to each stage of the series component.

[0048] Optionally, in some embodiments, the preset voltage source DC is a direct current power supply.

[0049] Specifically, Figure 2 As shown, in the multi-stage series assembly 200 of the embodiment of the utility model, each stage of the series assembly is provided with an interlocking connection port, such as Figure 2 In addition, when judging the interlocking result of the whole vehicle, the embodiment of the utility model needs to obtain the state of the interlocking connection port, and the state of the interlocking connection port may include an open circuit state and a short circuit state. The multi-stage series assembly 200 of the embodiment of the utility model is connected to a preset voltage source DC to power it through the preset voltage source DC to realize the detection of high-voltage interlocking.

[0050] The multi-stage series assembly 200 of the embodiment of the utility model is connected to the detection assembly 100, and the detection assembly 100 can obtain the voltage value between the two ends of each stage of the series assembly, such as Figure 2 As shown, the embodiment of the utility model can obtain the voltage value of two series components, and then add the two voltage values. Therefore, the utility model can obtain the interlocking result of the whole vehicle according to the sum of the voltage values ​​at both ends of each stage of the series components and the state of the interlocking connection port corresponding to each stage of the series components.

[0051] Therefore, the high-voltage interlock detection circuit of the utility model sets up a multi-stage series component, and monitors the voltage value at both ends of each stage of the series component in real time through the detection component, and obtains the vehicle interlocking result in combination with the state of the interlocking connection port. In addition, the circuit does not need to add an AD sampling port, which effectively solves the problem of false alarm of circuit fault while ensuring that the design cost remains unchanged.

[0052] Figure 3 The schematic diagram of the high voltage interlock detection circuit of a specific embodiment of the utility model is shown below. Figure 3 The structure of the high-voltage interlock detection circuit of the embodiment of the utility model is introduced in detail.

[0053] Optionally, in some embodiments, Figure 3As shown, the multi-stage series assembly 200 includes a first series assembly 201 and a second series assembly 202 , wherein the first series assembly 201 includes: a first diode D1 , a first transistor P1 and a first voltage regulator diode Z1 .

[0054] Specifically, the anode of the first diode D1 is connected to the preset voltage source DC and the detection component 100, respectively, and the cathode of the first diode D1 serves as the first sub-port a of the interlocking connection port A corresponding to the first series component 201; the emitter of the first transistor P1 is connected to the anode of the first diode D1, and the base of the first transistor P1 serves as the second sub-port b of the interlocking connection port A corresponding to the first series component 201; the cathode of the first zener diode Z1 is connected to the emitter of the first transistor P1, and the anode of the first zener diode Z1 is respectively connected to the collector of the first transistor P1 and the second series component 202.

[0055] Optionally, in some embodiments, the first transistor P1 is a PNP transistor.

[0056] Optionally, in some embodiments, Figure 3 As shown, the second series component 202 includes: a second diode D2, a second transistor P2 and a second voltage stabilizing diode Z2.

[0057] Among them, the anode of the second diode D2 is connected to the collector of the first transistor P1, and the cathode of the second diode D2 serves as the first sub-port c of the interlocking connection port B corresponding to the second series component 202; the emitter of the second transistor P2 is connected to the anode of the second diode D2, the base of the second transistor P2 serves as the second sub-port d of the interlocking connection port B corresponding to the second series component 202, and the collector of the second transistor P2 is grounded; the cathode of the second zener diode Z2 is connected to the emitter of the second transistor P2, and the anode of the second zener diode Z2 is connected to the collector of the second transistor P2.

[0058] Optionally, in some embodiments, the second transistor P2 is a PNP transistor.

[0059] Specifically, if Figure 3 As shown, the first diode D1 and the second diode D2 of the embodiment of the utility model are switching diodes. Since the switching diode has the conduction characteristics of a normal diode under the action of a forward voltage, and has a cut-off characteristic under the action of a reverse voltage, the first diode D1 and the second diode D2 of the embodiment of the utility model are equivalent to a switch, which can control the on and off of the circuit. Therefore, the high-voltage interlock detection circuit 10 of the utility model can use the cut-off and on states of the switching diode to quickly complete the switching of the circuit, improve the detection efficiency of the detection circuit, and to a certain extent protect the circuit from abnormal conditions such as overvoltage and overcurrent.

[0060] It can be understood that the first Zener diode Z1 and the first Zener diode Z1 of the embodiment of the utility model are mainly used as voltage stabilizers in the high-voltage interlock detection circuit 10. Since the current can vary within a wide range while the voltage remains basically unchanged, the embodiment of the utility model obtains a higher stable voltage by connecting Zener diodes in series.

[0061] The first transistor P1 and the second transistor P2 of the embodiment of the utility model are both PNP transistors. Due to the switching function of the PNP transistor, the high-voltage interlock detection circuit 10 of the embodiment of the utility model can use the PNP transistor to control the on-off of the current to improve the detection efficiency of the high-voltage interlock state.

[0062] Optionally, in some embodiments, Figure 3 As shown, the high-voltage interlock detection circuit 10 further includes: a resistor R1 , one end of the resistor R1 is connected to a preset voltage source DC, and the other end of the resistor R1 is connected to one end of the multi-stage series component 200 .

[0063] The first transistor P1 and the second transistor P2 of the embodiment of the utility model are both PNP transistors. Due to the amplification function of the PNP transistor, the high-voltage interlock detection circuit 10 of the embodiment of the utility model can use the PNP transistor to amplify the weak voltage signal to a higher level, and its amplification factor can be achieved by adjusting the size of the resistor R1. In addition, since the PNP transistor can also achieve the effect of a voltage stabilizer, the embodiment of the utility model can also stabilize the output voltage signal to the detection component 100 by adjusting the size of the resistor R1, thereby greatly improving the sampling resolution.

[0064] Based on the above embodiments, the high-voltage interlock detection circuit of the utility model is designed through a combination circuit of triodes, diodes and voltage regulator tubes, and forms a sampling voltage similar to a digital signal through a combination of switching tubes, thereby avoiding the detection differences and low resolution defects of analog voltage caused by series connection of resistors.

[0065] Optionally, in some embodiments, Figure 3 As shown, the high-voltage interlock detection circuit 10 further includes: a display component 300, which is connected to the detection component 100, and the display component 300 is used to display the vehicle interlock result.

[0066] Specifically, in order to clearly feed back the detection results to the technical staff, the embodiment of the utility model has an external display component 100 in the high-voltage interlock detection circuit 10. The display component 100 can obtain the detection results of the detection component 100 and push it to a display device such as a display screen, so that the technical staff can obtain the detection results and eliminate the risks in time in the event of an interlock fault, thereby ensuring the safety of the vehicle's high-voltage system and the operation of the entire vehicle system.

[0067] It should be noted that the vehicle interlocking result of the embodiment of the utility model may include data such as the state of the interlocking connection port, the sampling voltage and the detection record, which are not specifically limited here.

[0068] Optionally, in some embodiments, Figure 3 As shown, the high-voltage interlock detection circuit 10 further includes: a reminder component 400, which is connected to the detection component 100, and is used to issue a reminder of the vehicle interlock result.

[0069] It is understandable that in some cases, the technician cannot monitor the display component 300 all the time, which may lead to the omission of detection results and the inability to promptly resolve interlocking failures. In order to avoid this situation, the high-voltage interlock detection circuit 10 of the embodiment of the utility model can be externally connected to the reminder component 400 to feedback the vehicle interlocking result reminder to the technician through sound broadcast, thereby further ensuring the safety of the vehicle's high-voltage system.

[0070] It should be noted that the reminder component 400 of the embodiment of the present utility model can be a speaker, a sound device, etc., and is not specifically limited here.

[0071] Therefore, the high-voltage interlock detection circuit proposed by the utility model effectively solves the problem of misjudgment of circuit fault identification in the related art without increasing the DSP sampling port resources. At the same time, the sampling voltage of each connection state is independent of the resistance value, which increases the resolution of the sampling voltage and further improves the accuracy of the judgment.

[0072] In order to enable those skilled in the art to further understand the high-voltage interlock detection circuit of the embodiment of the utility model, the following examples are listed to schematically illustrate the detection principle of the circuit.

[0073] Specifically, Figure 4 Schematic diagram of an optimization scheme for a series interlock detection circuit according to a specific embodiment of the utility model, and Table 2 is a typical state table of different interlock connections.

[0074] Table 2

[0075]

[0076]

[0077] like Figure 4 As shown, in Figure 4 In (1) (corresponding to state 1 in Table 2), A is open, B is open, and the sampling voltage V1 = V z1 +V z2 , where V z1 is the voltage regulation value of Z1, V z2 is the voltage stabilization value of Z2;

[0078] exist Figure 4 In (2) (corresponding to state 2 in Table 2), A is short-circuited, B is open-circuited, and the sampling voltage V2 = V z2 ;

[0079] exist Figure 4 In (3) (corresponding to state 3 in Table 2), A is open circuit, B is short circuit, and the sampling voltage V2 = V z1 ;

[0080] exist Figure 4 In (4) (corresponding to state 4 in Table 2), A is short-circuited, B is short-circuited, and the sampling voltage V2 = 0;

[0081] exist Figure 4 In (5) (corresponding to state 5 in Table 2), the interlocking impedance of A and B is abnormal, and the sampling voltage V2 = V z1 +V z2 ;

[0082] in, Figure 4 (5) When A and B are connected to a certain resistance value, due to the combined characteristics of the PNP transistor and the diode, the transistor cannot be turned on. At this time, the sampling voltage is the same as the sampling voltage when A and B are interlocked and open, that is, the vehicle interlock abnormality can be reported completely and correctly at this time.

[0083] Therefore, the utility model does not increase DSP-AD (Digital Signal Processing-Analog to Digital Converte, analog / digital converter of digital processing chip) sampling port resources while ensuring that the design cost remains unchanged, meets the fault identification requirements, solves the problem of circuit fault false alarm, and improves the sampling resolution.

[0084] In addition, if the AD sampling port of the DSP is increased and each interlock signal is sampled separately, the accuracy of the sampled signal can be guaranteed, but the design cost will increase. Therefore, the high-voltage interlock detection circuit of the embodiment of the utility model can effectively reduce the design cost.

[0085] According to the high-voltage interlock detection circuit proposed in the embodiment of the utility model, one end of the multi-stage series components is connected to the preset voltage source and the detection component respectively, and each stage of the series components is provided with an interlock connection port, and the voltage value between the two ends of each stage of the series components is obtained by the detection component, and the vehicle interlock result is obtained according to the sum of the voltage values ​​between the two ends of each stage of the series components and the state of the interlock connection port corresponding to each stage of the series components. The utility model forms a sampling voltage circuit similar to a digital signal through the combined circuit design of a triode, a diode and a voltage regulator tube, thereby solving the problem that the detection circuit of the high-voltage interlock of electric vehicle devices in the related art causes the detection difference of the analog voltage caused by the series connection of resistors, resulting in the false alarm of the whole vehicle fault, etc., and meets the fault identification requirements without changing the design cost, improves the resolution of the sampling voltage, and thus improves the accuracy of the vehicle high-voltage interlock detection.

[0086] Next, a vehicle according to an embodiment of the present utility model will be described with reference to the accompanying drawings.

[0087] Figure 5 Schematic diagram of a vehicle according to an embodiment of the present utility model. Figure 5 As shown, the vehicle 20 includes the above-mentioned high-voltage interlock detection circuit 10 .

[0088] It should be noted that the above explanation of the embodiment of the high-voltage interlock detection circuit 10 is also applicable to the vehicle 20 of this embodiment, and will not be repeated here.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0090] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0091] It should be understood that the various parts of the utility model can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0092] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0093] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high voltage interlock detection circuit, characterized in that: include: Detection components and multi-stage series components, wherein, One end of the multi-stage series assembly is connected to a preset voltage source and the detection assembly respectively, the other end of the multi-stage series assembly is grounded, and each stage of the series assembly is provided with an interlocking connection port; The detection component is used to obtain the voltage value between the two ends of each series component, and obtain the vehicle interlocking result according to the sum of the voltage values ​​between the two ends of each series component and the state of the interlocking connection port corresponding to each series component.

2. The high voltage interlock detection circuit according to claim 1, characterized in that: The multi-stage series assembly includes a first series assembly and a second series assembly, wherein the first series assembly includes: a first diode, wherein an anode of the first diode is connected to the preset voltage source and the detection component respectively, and a cathode of the first diode serves as a first sub-port of an interlocking connection port corresponding to the first series component; a first triode, wherein the emitter of the first triode is connected to the anode of the first diode, and the base of the first triode serves as a second sub-port of the interlocking connection port corresponding to the first series component; A first voltage stabilizing diode, wherein the cathode of the first voltage stabilizing diode is connected to the emitter of the first transistor, and the anode of the first voltage stabilizing diode is respectively connected to the collector of the first transistor and the second series assembly.

3. The high voltage interlock detection circuit according to claim 2, characterized in that: The first transistor is a PNP transistor.

4. The high voltage interlock detection circuit according to claim 2, characterized in that: The second series assembly comprises: a second diode, wherein an anode of the second diode is connected to the collector of the first triode, and a cathode of the second diode serves as a first sub-port of the interlock connection port corresponding to the second series component; a second triode, wherein the emitter of the second triode is connected to the anode of the second diode, the base of the second triode serves as a second sub-port of the interlock connection port corresponding to the second series component, and the collector of the second triode is grounded; A second voltage stabilizing diode, wherein the cathode of the second voltage stabilizing diode is connected to the emitter of the second transistor, and the anode of the second voltage stabilizing diode is connected to the collector of the second transistor.

5. The high voltage interlock detection circuit according to claim 4, characterized in that: The second transistor is a PNP transistor.

6. The high voltage interlock detection circuit according to claim 1, characterized in that: Also includes: A resistor, one end of which is connected to the preset voltage source, and the other end of which is connected to one end of the multi-stage series component.

7. The high voltage interlock detection circuit according to claim 1, characterized in that: Also includes: A display component is connected to the detection component, and the display component is used to display the vehicle interlocking result.

8. The high voltage interlock detection circuit according to claim 1, characterized in that: Also includes: A reminder component is connected to the detection component, and the reminder component is used to issue a reminder of the vehicle interlocking result.

9. The high voltage interlock detection circuit according to claim 1, characterized in that: The preset voltage source is a direct current power source.

10. A vehicle, characterized in that: include: A high voltage interlock detection circuit as claimed in any one of claims 1 to 9.

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