Engine starting device, hybrid power system and hybrid electric vehicle

Abstract

The utility model provides an engine starting device, a hybrid power system and a hybrid electric vehicle. The device comprises a plurality of first connecting circuits and a switching circuit, the switching circuit comprises a plurality of sub-switching circuits, each first connecting circuit comprises a first electric wire and a second electric wire, the first electric wire is electrically connected with the positive electrode of the corresponding battery module, the second electric wire is electrically connected with the negative electrode of the corresponding battery module, and when the sub-switching circuits are closed, the sub-switching circuits are switched on. The corresponding first wires are electrically connected with the positive electrode of the engine, and the corresponding second wires are electrically connected with the negative electrode of the engine. The device solves the problems that in the prior art, a battery pack is independently arranged in a hybrid power system to provide large current to start an engine, the weight of the hybrid power system is increased, and the occupied space of the hybrid power system is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular, to an engine starting device, a hybrid power system and a hybrid vehicle. Background Art

[0002] In a hybrid power system, a large current needs to be provided to start the engine. In the prior art, a battery pack is separately arranged in the hybrid power system to provide a large current for starting the engine, which increases the weight of the hybrid power system and the space occupied by the hybrid power system.

[0003] At present, there is no solution to the above problems. Summary of the Utility Model

[0004] The main purpose of this application is to provide an engine starting device, a hybrid power system and a hybrid vehicle, so as to at least solve the problem that in the prior art, a battery pack is separately arranged in the hybrid power system to provide a large current for starting the engine, which increases the weight of the hybrid power system and the space occupied by the hybrid power system.

[0005] To achieve the above purpose, according to one aspect of this application, an engine starting device is provided. The power battery pack includes a plurality of serially connected battery modules. The device includes: a plurality of first connection circuits and a switch circuit. The switch circuit includes a plurality of sub-switch circuits. The first connection circuit includes a first wire and a second wire. One connection circuit corresponds to one battery module and one sub-switch circuit. The first wire is electrically connected to the positive electrode of the corresponding battery module. The sub-switch circuit includes a first positive terminal and a second positive terminal. The first wire is electrically connected to the corresponding first positive terminal. The second positive terminal is used to be electrically connected to the positive electrode of the engine. The second wire is electrically connected to the negative electrode of the corresponding battery module. The sub-switch circuit includes a first negative terminal and a second negative terminal. The second wire is electrically connected to the corresponding first negative terminal. The second negative terminal is used to be electrically connected to the negative electrode of the engine. When the sub-switch circuit is closed, the corresponding first wire is electrically connected to the positive electrode of the engine, and the corresponding second wire is electrically connected to the negative electrode of the engine.

[0006] Optionally, the hybrid vehicle includes an ignition button, and the switch circuit further includes: a hardware counter having an input terminal, a first output terminal, a second output terminal, and a reset terminal. The input terminal is electrically connected to the ignition button, all the second output terminals are electrically connected to the reset terminal. When the ignition button is in a triggered state, the first output terminal corresponding to the current number outputs a high-level signal. Each output terminal has a number, and the current number is the remainder of the ratio of the total number of triggers of the ignition button to the number of first output terminals. The first output terminals correspond to the sub-switch circuits one by one. The sub-switch circuit includes: a battery, a triode, a first relay, and a second relay. The first relay includes a first electromagnetic coil and a first contact, and the second relay includes a second electromagnetic coil and a second contact. The base of the triode is electrically connected to the corresponding first output terminal, the emitter of the triode is electrically connected to the negative electrode of the battery, the first electromagnetic coil and the second electromagnetic coil are both electrically connected to the positive electrode of the battery, the first electromagnetic coil and the second electromagnetic coil are both further electrically connected to the collector of the triode. The first contact is electrically connected to the corresponding first wire, and the first contact is also electrically connected to the positive electrode of the engine. The second contact is electrically connected to the corresponding second wire, and the second contact is also electrically connected to the negative electrode of the engine. The first contact and the second contact are both normally open contacts. When the first output terminal outputs a high-level signal, the first electromagnetic coil corresponding to the first output terminal is energized, and the second electromagnetic coil corresponding to the first output terminal is energized. When the first electromagnetic coil is energized, the first contact of the sub-switch circuit to which the first electromagnetic coil belongs is closed. When the second electromagnetic coil is energized, the second contact of the sub-switch circuit to which the second electromagnetic coil belongs is closed.

[0007] Optionally, the device includes: a primary equalization circuit, the primary equalization circuit includes: a first DCDC converter and a plurality of second connection circuits, the second connection circuit includes: a third wire and a fourth wire, the first DCDC converter includes a first positive input terminal, a first negative input terminal and a plurality of first output ports, each of the first output ports includes a first positive output terminal and a first negative output terminal, the first positive input terminal is used for electrically connecting with the positive electrode of the power battery pack, the first negative input terminal is used for electrically connecting with the negative electrode of the power battery pack, one of the first output ports corresponds to one of the battery modules and corresponds to one of the second connection circuits, the first positive output terminal is electrically connected with the corresponding third wire, the third wire is used for electrically connecting with the positive electrode of the corresponding battery module, the first negative output terminal is electrically connected with the corresponding fourth wire, the fourth wire is used for electrically connecting with the positive electrode of the corresponding battery module, and the input voltage values of all the first output ports are the same.

[0008] Optionally, the battery module includes a plurality of serially connected battery cells, the device includes: a secondary equalization circuit, the secondary equalization circuit includes: a plurality of second DCDC converters and a plurality of second connection circuits, the second connection circuit includes: a fifth wire and a sixth wire, the second DCDC converter includes a second positive input terminal, a second negative input terminal and a plurality of second output ports, each of the second output ports includes a second positive output terminal and a second negative output terminal, the second positive input terminal is used for electrically connecting with the positive electrode of the corresponding battery module, the second negative input terminal is used for electrically connecting with the negative electrode of the corresponding battery module, one of the second output ports corresponds to one of the battery cells in one of the battery modules and corresponds to one of the second connection circuits, the second positive output terminal is electrically connected with the corresponding fifth wire, the fifth wire is used for electrically connecting with the positive electrode of the corresponding battery cell in the corresponding battery module, the first negative output terminal is electrically connected with the corresponding sixth wire, the sixth wire is used for electrically connecting with the negative electrode of the corresponding battery cell in the corresponding battery module, and the input voltage values of all the second output ports are the same.

[0009] Optionally, the first DCDC converter includes: a first primary coil; a first primary driving circuit electrically connected to the first primary coil, the first primary driving circuit including the first positive input terminal and the first negative input terminal; a first voltage sampling and comparing circuit including a plurality of the first output ports and a first reference voltage output terminal for outputting a first maximum output voltage value, which is the maximum value among the output voltage values of all the first output ports; a plurality of first secondary coils; a plurality of first rectifying circuits, each of the first rectifying circuits corresponding to one of the first secondary coils and being electrically connected to the corresponding first secondary coil; a plurality of first feedback voltage regulating single paths, each of the first feedback voltage regulating single paths corresponding to one of the first rectifying circuits and being configured to be electrically connected to the corresponding first rectifying circuit, each of the first feedback voltage regulating single paths including a plurality of first reference voltage input terminals, each of the first reference voltage input terminals being electrically connected to the first reference voltage output terminal, each of the first feedback voltage regulating single paths corresponding to one of the first output ports and being electrically connected to the corresponding first output port.

[0010] Optionally, the second DCDC converter includes: a second primary coil; a second primary driving circuit electrically connected to the second primary coil, the second primary driving circuit including the second positive input terminal and the second negative input terminal; a second voltage sampling and comparing circuit including a plurality of the second output ports and a second reference voltage output terminal for outputting a second maximum output voltage value, which is the maximum value among the output voltage values of all the second output ports; a plurality of second secondary coils; a plurality of second rectifying circuits, each of the second rectifying circuits corresponding to one of the second secondary coils and being electrically connected to the corresponding second secondary coil; a plurality of second feedback voltage regulating single paths, each of the second feedback voltage regulating single paths corresponding to one of the second rectifying circuits and being configured to be electrically connected to the corresponding second rectifying circuit, each of the second feedback voltage regulating single paths including a plurality of second reference voltage input terminals, each of the second reference voltage input terminals being electrically connected to the second reference voltage output terminal, each of the second feedback voltage regulating single paths corresponding to one of the second output ports and being electrically connected to the corresponding second output port.

[0011] Optionally, the sub-switching circuit includes: a first resistor electrically connected to the corresponding first output terminal and the base of the triode; a second resistor electrically connected to the first resistor and the negative electrode of the battery.

[0012] Optionally, the sub-switching circuit further includes: a capacitor electrically connected to the base of the triode and the negative electrode of the battery.

[0013] According to another aspect of the present application, a hybrid power system is provided, including: any one of the engine starting devices, the power battery pack, and the engine.

[0014] According to still another aspect of the present application, a hybrid vehicle is provided, including: the hybrid power system.

[0015] Applying the technical solution of the present application, when any one of the switching circuits is closed, through the corresponding first connection circuit and the switching circuit, the corresponding battery modules are electrically connected to the engine, and the corresponding battery modules can supply power to the engine, that is, a certain battery module in the power battery pack of the hybrid power system provides a starting current for the engine, and a separate battery pack for starting the engine is no longer provided, reducing the weight of the hybrid power system and the space occupied by the hybrid power system, thus solving the problem in the prior art that a separate battery pack is provided in the hybrid power system to provide a large current to start the engine, which increases the weight of the hybrid power system and the space occupied by the hybrid power system. Description of the Drawings

[0016] Figure 1 Shows a structural block diagram of an engine starting device provided in an embodiment of the present application;

[0017] Figure 2 Shows a structural block diagram of a hardware counter provided in an embodiment of the present application;

[0018] Figure 3 Shows a structural block diagram of a sub-switching circuit provided in an embodiment of the present application;

[0019] Figure 4 Shows a structural block diagram of a first DCDC converter provided in an embodiment of the present application;

[0020] Figure 5 Shows a structural block diagram of a first primary side drive circuit provided in an embodiment of the present application;

[0021] Figure 6The structural block diagram of a first voltage sampling and comparison circuit provided in an embodiment according to the present application is shown;

[0022] Figure 7 The structural block diagram of a first rectification circuit provided in an embodiment according to the present application is shown;

[0023] Figure 8 The structural block diagram of a single feedback voltage regulation path provided in an embodiment according to the present application is shown;

[0024] Figure 9 The structural block diagram of a secondary side feedback output circuit provided in an embodiment according to the present application is shown.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10, power battery pack; 20, battery module; 30, first wire; 31, second wire; 32, third wire; 33, fourth wire; 34, fifth wire; 35, sixth wire; 40, switch circuit; 50, first DCDC converter; 60, second DCDC converter; 70, first primary coil; 71, first primary drive circuit; 72, first voltage sampling and comparison circuit; 73, first secondary coil; 74, first rectification circuit; 75, first single feedback voltage regulation path; 76, secondary side feedback output circuit. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the description, claims, and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present application described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0030] As introduced in the background art, in the prior art, a battery pack is separately provided in a hybrid power system to provide a large current for starting the engine, which increases the weight of the hybrid power system and the space occupied by the hybrid power system. To solve the problem that in the prior art, a battery pack is separately provided in a hybrid power system to provide a large current for starting the engine, which increases the weight of the hybrid power system and the space occupied by the hybrid power system, embodiments of the present application provide an engine starting device, a hybrid power system, and a hybrid vehicle.

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model.

[0032] Figure 1 It is a structural block diagram of an engine starting device according to an embodiment of the present application. As Figure 1 shown, the power battery pack 10 includes a plurality of serially connected battery modules 20, and the device includes:

[0033] A plurality of first connection circuits and a switch circuit 40, the switch circuit 40 includes a plurality of sub-switch circuits, the first connection circuit includes a first wire 30 and a second wire 31, one of the connection circuits corresponds to one of the battery modules 20, and corresponds to one of the sub-switch circuits, the first wire 30 is electrically connected to the positive electrode of the corresponding battery module 20, the sub-switch circuit includes a first positive terminal and a second positive terminal, the first wire 30 is electrically connected to the corresponding first positive terminal, the second positive terminal is used to be electrically connected to the positive electrode (V2+) of the engine, the second wire 31 is electrically connected to the negative electrode of the corresponding battery module 20, the sub-switch circuit includes a first negative terminal and a second negative terminal, the second wire 31 is electrically connected to the corresponding first negative terminal, the second negative terminal is used to be electrically connected to the negative electrode (V2-) of the engine, when the sub-switch circuit is closed, the corresponding first wire 30 is electrically connected to the positive electrode (V2+) of the engine, and the corresponding second wire 31 is electrically connected to the negative electrode (V2-) of the engine.

[0034] Through the above embodiments, when any one of the switch circuits is closed, the corresponding battery module is electrically connected to the engine through the corresponding first connection circuit and the switch circuit, and the corresponding battery module can supply power to the engine. That is, a certain battery module in the power battery pack of the hybrid system is used to provide starting current for the engine, and a separate battery pack for starting the engine is no longer provided, reducing the weight of the hybrid system and the space occupied by the hybrid system, thus solving the problem in the prior art that a separate battery pack is provided in the hybrid system to provide large current to start the engine, which increases the weight of the hybrid system and the space occupied by the hybrid system.

[0035] The hybrid vehicle includes an ignition button. In an optional embodiment, the above switch circuit further includes:

[0036] A hardware counter. The hardware counter has an input terminal, a first output terminal, a second output terminal, and a reset terminal. The input terminal is electrically connected to the ignition button, all the second output terminals are electrically connected to the reset terminal. When the ignition button is in a triggered state, the corresponding first output terminal of the current number outputs a high-level signal. Each output terminal has a number, and the current number is the remainder of the ratio of the total number of triggers of the ignition button to the number of first output terminals.

[0037] Specifically, as Figure 2 shown, the model of the hardware counter is CD4017BM-MS. The pin 13 of the hardware counter is the input terminal, and the input terminal is electrically connected to the ignition button. The pins 1, 2, 3, 4, 7, and 10 of the hardware counter are all the first output terminals. The pin 5 of the hardware counter is the second output terminal, and the pin 15 of the hardware counter is the reset terminal. All the second output terminals are electrically connected to the reset terminal.

[0038] The above first output terminals correspond to the sub-switch circuits one by one, as Figure 3As shown in the figure, the above-mentioned sub-switch circuit includes: a battery, a triode Q1, a first relay RLY1+ and a second relay RLY1-. The first relay RLY1+ includes a first electromagnetic coil B1+ and a first contact A1+. The second relay RLY1- includes a second electromagnetic coil B1- and a second contact A1-. The base of the triode Q1 is electrically connected to the corresponding first output terminal. The emitter of the triode Q1 is electrically connected to the negative electrode (G) of the battery. The first electromagnetic coil B1+ and the second electromagnetic coil B1- are both electrically connected to the positive electrode (VCC) of the battery. The first electromagnetic coil B1+ and the second electromagnetic coil B1- are also both electrically connected to the collector of the triode Q1. The first contact A1+ is electrically connected to the corresponding first wire, and the first contact A1+ is also electrically connected to the positive electrode of the engine. The second contact A1- is electrically connected to the corresponding second wire, and the second contact A1- is also electrically connected to the negative electrode of the engine. The first contact A1+ and the second contact A1- are both normally open contacts. When a high-level signal is output at the first output terminal, the first electromagnetic coil B1+ corresponding to the first output terminal is energized, and the second electromagnetic coil B1- corresponding to the first output terminal is energized. When the first electromagnetic coil B1+ is energized, the first contact A1+ of the sub-switch circuit to which the first electromagnetic coil B1+ belongs is closed. When the second electromagnetic coil B1- is energized, the second contact A1- of the sub-switch circuit to which the second electromagnetic coil B1- belongs is closed.

[0039] Specifically, as Figure 2 shown, the model of the hardware counter is CD4017BM-MS. Pin 13 of the hardware counter is the above-mentioned input terminal, and the input terminal is electrically connected to the ignition button. Pins 1, 2, 3, 4, 7, and 10 of the hardware counter are all the above-mentioned first output terminals. Pin 5 of the hardware counter is the above-mentioned second output terminal. Pin 15 of the hardware counter is the above-mentioned reset terminal. All the second output terminals are electrically connected to the reset terminal. The hardware counter is triggered by the ignition button and automatically increments by 1 each time after ignition. When it exceeds 6, it resets and automatically returns to 1. Therefore, the hardware counter always stores a number between 1 and 6. The numbers 1-6 of the hardware counter correspond to pins 1, 3, 4, 6, and 10 of the hardware counter respectively. As Figure 1 shown, 12 contacts A1+, A1-, A2+, A2-, A3+, A3-, A4+, A4-, A5+, A5-, A6+, A6- are controlled by a triode to open and close, ensuring that a set of 24V (the voltage of a battery module is 24V) is output each time the engine starts.

[0040] Specifically, the output voltage of the power battery pack is 144V, and 24V is required to start the engine. We add a tap in the middle of the power battery pack to draw out, and divide the power battery pack into 6 groups of 24V. Each time the engine is started, 1-6 groups of 24V are used alternately.

[0041] In an alternative embodiment, the above device includes:

[0042] A primary balancing circuit, such as Figure 1 As shown, the above primary balancing circuit includes: a first DCDC converter 50 and a plurality of second connection circuits. The above second connection circuits include: a third wire 32 and a fourth wire 33. The above first DCDC converter 50 includes a first positive input terminal, a first negative input terminal, and a plurality of first output ports. Each of the above first output ports includes a first positive output terminal and a first negative output terminal. The above first positive input terminal is used to be electrically connected to the positive electrode (V1+) of the above power battery pack 10, and the above first negative input terminal is used to be electrically connected to the negative electrode (V1-) of the above power battery pack 10. One of the above first output ports corresponds to one of the above battery modules 20 and corresponds to one of the above second connection circuits. The above first positive output terminal is electrically connected to the corresponding above third wire 32, and the above third wire 32 is used to be electrically connected to the positive electrode of the corresponding above battery module 20. The above first negative output terminal is electrically connected to the corresponding above fourth wire 33, and the above fourth wire 33 is used to be electrically connected to the positive electrode of the corresponding above battery module 20. The input voltage values of all the above first output ports are the same.

[0043] Specifically, when a certain battery module supplies power to start the engine, the voltage of this battery module will be lower than that of other battery modules. Therefore, a primary balancing circuit is set up to balance the voltages of the 6 groups of 24V battery modules in real time to ensure that the voltages of each battery module are the same. And each time the engine is started, the six groups of 24V battery modules are used alternately. Therefore, the aging attenuation degree of each battery module can also be made the same to ensure the consistency of the battery module life.

[0044] In an alternative embodiment, the above battery module includes a plurality of serially connected battery cells, and the above device includes:

[0045] Two - stage balancing circuit. The above two - stage balancing circuit includes: a plurality of second DCDC converters 60 and a plurality of second connection circuits. The above second connection circuits include: a fifth wire 34 and a sixth wire 35. The above second DCDC converter 60 includes a second positive input terminal, a second negative input terminal, and a plurality of second output ports. Each of the above second output ports includes a second positive output terminal and a second negative output terminal. The above second positive input terminal is used for electrically connecting to the positive electrode of the corresponding battery module 20, and the above second negative input terminal is used for electrically connecting to the negative electrode of the corresponding battery module 20. One of the above second output ports corresponds to one of the above battery cells in one of the above battery modules 20 and corresponds to one of the above second connection circuits. The above second positive output terminal is electrically connected to the corresponding fifth wire 34. The fifth wire 34 is used for electrically connecting to the positive electrode of the corresponding battery cell in the corresponding battery module 20. The first negative output terminal is electrically connected to the corresponding sixth wire 35. The sixth wire 35 is used for electrically connecting to the negative electrode of the corresponding battery cell in the corresponding battery module 20. The input voltage values of all the above second output ports are the same.

[0046] Specifically, a two - stage balancing circuit is set up to perform voltage balancing on the battery cells in each group of 24V battery modules in real - time, ensuring that the voltages of the battery cells in each battery module are the same, thereby further ensuring the consistency of the battery module life.

[0047] In an alternative implementation, as Figure 4 shown, the above first DCDC converter includes:

[0048] A first primary coil 70;

[0049] A first primary drive circuit 71. The above first primary drive circuit 71 is electrically connected to the above first primary coil 70. The above first primary drive circuit 71 includes the above first positive input terminal and the above first negative input terminal;

[0050] Specifically, the structure of the first primary drive circuit is as Figure 5 shown.

[0051] A first voltage sampling and comparison circuit 72. The above first voltage sampling and comparison circuit 72 includes a plurality of the above first output ports and a first reference voltage output terminal. The first reference voltage output terminal is used for outputting a first maximum output voltage value. The first maximum output voltage value is the maximum value among the output voltage values of all the above first output ports;

[0052] Specifically, the structure of the first voltage sampling and comparison circuit is as Figure 6 shown.

[0053] A plurality of first secondary coils 73;

[0054] A plurality of first rectifying circuits 74, the first rectifying circuits 74 corresponding to the first secondary coils 73 one by one, and the first rectifying circuits 74 being electrically connected to the corresponding first secondary coils 73;

[0055] Specifically, the structure of the first rectifying circuit is as Figure 7 shown.

[0056] A plurality of first feedback voltage regulating single paths 75, the first feedback voltage regulating single paths 75 corresponding to the first rectifying circuits 74 one by one, and the first feedback voltage regulating single paths 75 being used to be electrically connected to the first rectifying circuits 74. The first feedback voltage regulating single paths 75 include a plurality of first reference voltage input ends, each of the first reference voltage input ends being electrically connected to the first reference voltage output end. The first feedback voltage regulating single paths 75 correspond to the first output ports one by one, and the first feedback voltage regulating single paths 75 are electrically connected to the corresponding first output ports.

[0057] Specifically, the structure of the first feedback voltage regulating single path is as Figure 8 shown.

[0058] Specifically, as Figure 4 shown, the first DCDC converter further includes: a secondary feedback output circuit 76, the structure of the secondary feedback output circuit being as Figure 9 shown.

[0059] In an optional implementation, the second DCDC converter includes:

[0060] A second primary coil;

[0061] A second primary driving circuit, the second primary driving circuit being electrically connected to the second primary coil, and the second primary driving circuit including the second positive input end and the second negative input end;

[0062] A second voltage sampling and comparing circuit, the second voltage sampling and comparing circuit including a plurality of the second output ports and a second reference voltage output end, the second reference voltage output end being used to output a second maximum output voltage value, the second maximum output voltage value being the maximum value among the output voltage values of all the second output ports;

[0063] A plurality of second secondary coils;

[0064] A plurality of second rectifying circuits, the second rectifying circuits corresponding to the second secondary coils one by one, and the second rectifying circuits being electrically connected to the corresponding second secondary coils;

[0065] Multiple second feedback voltage regulating single paths, where the above-mentioned second feedback voltage regulating single paths correspond one-to-one with the above-mentioned second rectifying circuits, and the above-mentioned second feedback voltage regulating single paths are used to be electrically connected to the above-mentioned second rectifying circuits. The above-mentioned second feedback voltage regulating single paths include multiple second reference voltage input ends, and each of the above-mentioned second reference voltage input ends is electrically connected to the above-mentioned second reference voltage output end. The above-mentioned second feedback voltage regulating single paths correspond one-to-one with the above-mentioned second output ports, and the above-mentioned second feedback voltage regulating single paths are electrically connected to the corresponding above-mentioned second output ports.

[0066] Specifically, the structure diagram of the second DCDC converter is the same as that of the first DCDC converter.

[0067] In an alternative implementation, as Figure 3 shown, the above-mentioned sub-switching circuit includes:

[0068] A first resistor R1, the above-mentioned first resistor R1 is electrically connected to the corresponding above-mentioned first output end, and the above-mentioned first resistor R1 is electrically connected to the base of the above-mentioned triode Q1;

[0069] A second resistor R2, the above-mentioned second resistor R2 is electrically connected to the above-mentioned first resistor R1, and the above-mentioned second resistor R2 is electrically connected to the negative electrode (G) of the above-mentioned battery.

[0070] Specifically, the function of the first resistor is driving, and the function of the second resistor is clamping.

[0071] In an alternative implementation, as Figure 3 shown, the above-mentioned sub-switching circuit further includes:

[0072] A capacitor C1, the above-mentioned capacitor C1 is electrically connected to the base of the above-mentioned triode Q1, and the above-mentioned capacitor C1 is electrically connected to the negative electrode (G) of the above-mentioned battery.

[0073] Specifically, the function of the capacitor is filtering.

[0074] The embodiment of the present invention provides a hybrid power system, including: the above-mentioned engine starting device, the above-mentioned power battery pack and the engine.

[0075] The embodiment of the present invention provides a hybrid electric vehicle, including: the above-mentioned hybrid power system.

[0076] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0077] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0078] In the engine starting device of the present application, when any one of the switch circuits is closed, the corresponding battery module is electrically connected to the engine through the corresponding first connection circuit and the switch circuit, and the corresponding battery module can supply power to the engine, that is, a certain battery module in the power battery pack of the hybrid system is used to provide starting current for the engine, and a separate battery pack for starting the engine is no longer provided, reducing the weight of the hybrid system and the space occupied by the hybrid system, thus solving the problem in the prior art that a separate battery pack is provided in the hybrid system to provide large current to start the engine, which increases the weight of the hybrid system and the space occupied by the hybrid system.

[0079] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An engine starting device, characterized in that: The power battery pack includes a plurality of battery modules connected in series, and the device includes: A plurality of first connection circuits and switch circuits, the switch circuit comprising a plurality of sub-switch circuits, the first connection circuit comprising a first wire and a second wire, one connection circuit corresponds to one battery module and corresponds to one sub-switch circuit, the first wire is electrically connected to the positive pole of the corresponding battery module, the sub-switch circuit comprises a first positive terminal and a second positive terminal, the first wire is electrically connected to the corresponding first positive terminal, the second positive terminal is used to be electrically connected to the positive pole of the engine, the second wire is electrically connected to the corresponding negative pole of the battery module, the sub-switch circuit comprises a first negative terminal and a second negative terminal, the second wire is electrically connected to the corresponding first negative terminal, the second negative terminal is used to be electrically connected to the negative pole of the engine, when the sub-switch circuit is closed, the corresponding first wire is electrically connected to the positive pole of the engine, and the corresponding second wire is electrically connected to the negative pole of the engine.

2. The device according to claim 1, characterized in that The hybrid vehicle includes an ignition button, and the switch circuit further includes: A hardware counter, wherein the hardware counter has an input terminal, a first output terminal, a second output terminal and a reset terminal, wherein the input terminal is electrically connected to the ignition button, and all the second output terminals are electrically connected to the reset terminal. When the ignition button is in a triggered state, the first output terminal corresponding to the current number outputs a high level signal, and each output terminal has a number, and the current number is the remainder of the ratio of the total number of triggering times of the ignition button to the number of the first output terminals; The first output terminal corresponds to the sub-switch circuit one by one, and the sub-switch circuit includes: a battery, a transistor, a first relay and a second relay, the first relay includes a first electromagnetic coil and a first contact, the second relay includes a second electromagnetic coil and a second contact, the base of the transistor is electrically connected to the corresponding first output terminal, the emitter of the transistor is electrically connected to the negative electrode of the battery, the first electromagnetic coil and the second electromagnetic coil are both electrically connected to the positive electrode of the battery, the first electromagnetic coil and the second electromagnetic coil are also electrically connected to the collector of the transistor, the first contact is electrically connected to the corresponding first wire, and the first contact The first contact is also electrically connected to the positive pole of the engine, the second contact is electrically connected to the corresponding second wire, the second contact is also electrically connected to the negative pole of the engine, the first contact and the second contact are both normally open contacts, when the first output end outputs a high level signal, the first electromagnetic coil corresponding to the first output end is energized, and the second electromagnetic coil corresponding to the first output end is energized, when the first electromagnetic coil is energized, the first contact of the sub-switch circuit to which the first electromagnetic coil belongs is closed, and when the second electromagnetic coil is energized, the second contact of the sub-switch circuit to which the second electromagnetic coil belongs is closed.

3. The device according to claim 1, characterized in that The device comprises: A primary balancing circuit, the primary balancing circuit comprising: a first DCDC converter and a plurality of second connection circuits, the second connection circuit comprising: a third wire and a fourth wire, the first DCDC converter comprising a first positive input terminal, a first negative input terminal and a plurality of first output ports, each of the first output ports comprising a first positive output terminal and a first negative output terminal, the first positive input terminal being used to be electrically connected to the positive electrode of the power battery pack, the first negative input terminal being used to be electrically connected to the negative electrode of the power battery pack, one first output port corresponding to one battery module and corresponding to one second connection circuit, the first positive output terminal being electrically connected to the corresponding third wire, the third wire being used to be electrically connected to the positive electrode of the corresponding battery module, the first negative output terminal being electrically connected to the corresponding fourth wire, the fourth wire being used to be electrically connected to the positive electrode of the corresponding battery module, and the input voltage values ​​of all the first output ports being the same.

4. The device according to claim 1, characterized in that The battery module includes a plurality of battery cells connected in series, and the device includes: A secondary balancing circuit, the secondary balancing circuit comprising: a plurality of second DCDC converters and a plurality of second connection circuits, the second connection circuit comprising: a fifth wire and a sixth wire, the second DCDC converter comprising a second positive input terminal, a second negative input terminal and a plurality of second output ports, each of the second output ports comprising a second positive output terminal and a second negative output terminal, the second positive input terminal being used to be electrically connected to the positive electrode of the corresponding battery module, the second negative input terminal being used to be electrically connected to the negative electrode of the corresponding battery module, one second output port corresponding to one of the cells in one of the battery modules and corresponding to one of the second connection circuits, the second positive output terminal being electrically connected to the corresponding fifth wire, the fifth wire being used to be electrically connected to the positive electrode of the corresponding cell in the corresponding battery module, the second negative output terminal being electrically connected to the corresponding sixth wire, the sixth wire being used to be electrically connected to the negative electrode of the corresponding cell in the corresponding battery module, and the input voltage values ​​of all the second output ports being the same.

5. The device according to claim 3, characterized in that The first DCDC converter comprises: A first primary coil; a first primary drive circuit, the first primary drive circuit being electrically connected to the first primary coil, the first primary drive circuit comprising the first positive input terminal and the first negative input terminal; a first voltage sampling and comparing circuit, wherein the first voltage sampling and comparing circuit comprises a plurality of the first output ports and a first reference voltage output terminal, wherein the first reference voltage output terminal is used to output a first maximum output voltage value, and the first maximum output voltage value is a maximum value among the output voltage values ​​of all the first output ports; a plurality of first secondary coils; A plurality of first rectifier circuits, wherein the first rectifier circuits correspond to the first secondary coils one by one, and the first rectifier circuits are electrically connected to the corresponding first secondary coils; A plurality of first feedback voltage regulation single paths, wherein the first feedback voltage regulation single paths correspond one-to-one to the first rectifier circuit, and the first feedback voltage regulation single paths are used to be electrically connected to the first rectifier circuit, the first feedback voltage regulation single paths include a plurality of first reference voltage input terminals, each of the first reference voltage input terminals is electrically connected to the first reference voltage output terminal, the first feedback voltage regulation single paths correspond one-to-one to the first output ports, and the first feedback voltage regulation single paths are electrically connected to the corresponding first output ports.

6. The device according to claim 4, characterized in that The second DCDC converter comprises: The second primary coil; a second primary drive circuit, the second primary drive circuit being electrically connected to the second primary coil, the second primary drive circuit comprising the second positive input terminal and the second negative input terminal; a second voltage sampling and comparing circuit, wherein the second voltage sampling and comparing circuit comprises a plurality of the second output ports and a second reference voltage output terminal, wherein the second reference voltage output terminal is used to output a second maximum output voltage value, and the second maximum output voltage value is a maximum value among the output voltage values ​​of all the second output ports; a plurality of second secondary coils; a plurality of second rectifier circuits, wherein the second rectifier circuits correspond to the second secondary coils one by one, and the second rectifier circuits are electrically connected to the corresponding second secondary coils; A plurality of second feedback voltage regulating single paths, each of the second feedback voltage regulating single paths corresponds one-to-one to the second rectifier circuit, and the second feedback voltage regulating single paths are used to be electrically connected to the second rectifier circuit, the second feedback voltage regulating single paths include a plurality of second reference voltage input terminals, each of the second reference voltage input terminals is electrically connected to the second reference voltage output terminal, the second feedback voltage regulating single paths correspond one-to-one to the second output ports, and the second feedback voltage regulating single paths are electrically connected to the corresponding second output ports.

7. The device according to claim 2, characterized in that The sub-switch circuit comprises: a first resistor, the first resistor being electrically connected to the corresponding first output terminal, and the first resistor being electrically connected to the base of the transistor; A second resistor, wherein the second resistor is electrically connected to the first resistor and the second resistor is electrically connected to the negative electrode of the battery.

8. The device according to claim 7, characterized in that The sub-switch circuit further includes: A capacitor is electrically connected to the base of the transistor, and the capacitor is electrically connected to the negative electrode of the battery.

9. A hybrid power system, characterized in that: include: The engine starting device according to any one of claims 1 to 8, the power battery pack and the engine.

10. A hybrid vehicle, characterized in that: include: The hybrid power system of claim 9.

Images