DC-DC converter protection system and vehicle

Abstract

The utility model provides a DC-DC converter protection system and a vehicle. The DC-DC converter protection system comprises a storage battery; the converter shell comprises a shell output end; the DC-DC conversion module is located in the converter shell and comprises a conversion enabling control and a conversion output end, and the conversion output end, the shell output end and the storage battery are sequentially connected to form an output loop; the protection loop is connected with the output loop in parallel and comprises a protection loop input end and a protection loop output end, the protection loop input end is located between the conversion output end and the shell output end, and the protection loop output end is connected with the storage battery; wherein the protection loop is provided with a monitoring device, the monitoring device is connected with the conversion enabling control, and when an electric signal of the protection loop exceeds a preset value, the conversion enabling control is closed, so that the DC-DC conversion module is controlled to be closed. According to the application, the protection loop connected in parallel with the output loop is arranged, so that the case that the shell output end on the output loop is heated or on fire is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a DC-DC converter protection system and a vehicle. Background Art

[0002] In the prior art, the output end of a DC-DC converter is usually provided with a circular cold-pressed terminal (i.e., OT terminal) as an output interface. Since the OT terminal is connected to the DC-DC converter by screw connection, during use, once the connection between the OT terminal and the DC-DC converter becomes loose, it will cause the connection to heat up or even catch fire. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a DC-DC converter protection system and a vehicle to solve the problem of heating or fire caused by loose connection of the output interface of the DC-DC converter.

[0004] Based on the above objectives, the present invention provides a DC-DC converter protection system, comprising:

[0005] batteries;

[0006] A converter housing, including a housing output end;

[0007] A DC-DC conversion module is located in the converter housing and includes a conversion enable control and a conversion output terminal. The conversion output terminal, the housing output terminal, and the battery are sequentially connected to form an output loop.

[0008] a protection circuit connected in parallel with the output circuit, comprising a protection circuit input end and a protection circuit output end, wherein the protection circuit input end is located between the conversion output end and the housing output end, and the protection circuit output end is connected to the battery;

[0009] Wherein, a monitoring device is provided on the protection circuit, and the monitoring device is connected to the conversion enable control. When the electrical signal of the protection circuit exceeds a preset value, the conversion enable control is turned off to control the DC-DC conversion module to be turned off.

[0010] Furthermore, the protection system further includes an auxiliary module, the auxiliary module being located in the converter housing and including an auxiliary input terminal, the converter housing including an auxiliary power supply terminal, the auxiliary input terminal, the auxiliary power supply terminal, and the battery being connected in sequence to form an auxiliary circuit;

[0011] The protection circuit output end is located between the auxiliary input end and the auxiliary power supply end so as to be connected to the battery through the auxiliary circuit.

[0012] Furthermore, the protection circuit output end is located between the shell output end and the battery, so as to be connected to the battery through the output circuit.

[0013] Furthermore, the converter housing includes a signal plug-in terminal, and the protection circuit input terminal, the signal plug-in terminal and the protection circuit output terminal are sequentially connected to form the protection circuit.

[0014] Furthermore, a first fuse is provided on the protection circuit, and the first fuse is located between the signal plug-in terminal and the protection circuit output terminal, and the monitoring device is located between the protection circuit input terminal and the signal plug-in terminal.

[0015] Furthermore, the auxiliary module includes a DC-DC controller connected to the auxiliary input terminal, the DC-DC controller is connected to the conversion enable control, and when receiving the electrical signal transmitted by the auxiliary input terminal, turns on the conversion enable control to control the DC-DC conversion module to turn on;

[0016] The DC-DC controller is connected to the monitoring device, and when the electrical signal of the protection circuit transmitted by the monitoring device exceeds a preset value, the DC-DC controller turns off the conversion enable control to control the DC-DC conversion module to turn off.

[0017] Furthermore, the cross-sectional area of the protection circuit is smaller than the cross-sectional area of the output circuit.

[0018] Furthermore, a second fuse is provided on the auxiliary circuit, and the second fuse is located between the auxiliary power supply end and the battery.

[0019] Furthermore, the auxiliary module also includes an auxiliary power supply, the input end of the auxiliary power supply is connected to the battery through the auxiliary input end, and the output end of the auxiliary power supply is connected to the DC-DC controller.

[0020] Based on the same inventive concept, the present invention also provides a vehicle, comprising the DC-DC converter protection system as described in any one of the above items.

[0021] As can be seen from the above description, the DC-DC converter protection system provided by the present invention provides a protection circuit in parallel with the output circuit, and provides a monitoring device connected to the conversion enable control on the protection circuit. When the output interface connection at the output end of the housing becomes loose and causes the output circuit resistance to increase, the monitoring device can detect that the current on the protection circuit increases to exceed a preset value, and then turn off the conversion enable control, thereby controlling the DC-DC conversion module to turn off, thereby preventing the DC-DC conversion module from continuing to output to the output circuit after being turned off, thereby preventing the output interface at the output end of the housing located on the output circuit from heating or catching fire, and preventing the DC-DC converter from being damaged due to heating or catching fire on the output interface, which is conducive to extending the service life of the DC-DC converter. In addition, the protection circuit and the monitoring device are simple to set up, which facilitates the promotion and application of the DC-DC converter protection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the connection structure between a DC-DC converter and a battery in the prior art;

[0024] Figure 2 This is a schematic diagram of the first structure of the DC-DC converter protection system according to an embodiment of the present utility model;

[0025] Figure 3 This is a second structural diagram of the DC-DC converter protection system according to an embodiment of the present utility model.

[0026] In the figure: 01, DC-DC converter; 10, battery; 20, converter housing; 21, housing output terminal; 22, auxiliary power supply terminal; 23, signal plug terminal; 30, DC-DC conversion module; 31, conversion enable control; 32, conversion output terminal; 40, output circuit; 50, protection circuit; 51, protection circuit input terminal; 52, protection circuit output terminal; 53, monitoring device; 54, first fuse; 60, auxiliary module; 61, auxiliary input terminal; 62, auxiliary circuit; 63, DC-DC controller; 64, second fuse; 65, auxiliary power supply; 66, load. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0029] like Figure 1 As shown, DC-DC converter 01 is a DC-DC converter. In a vehicle, DC-DC converter 01 replenishes battery 10 and supplies power to low-voltage electrical appliances on the vehicle through battery 10, auxiliary power supply 65, and driver chip (i.e., load 66). DC-DC converter 01 outputs a 12V voltage, which is a safe voltage. Therefore, OT terminals are often used as the output interface of DC-DC converter 01. OT terminals can easily implement chain bridge connection, have a simple structure, and are low-cost.

[0030] However, since the OT terminal and the output end of the DC-DC converter 01 (i.e., the shell output end 21) are threadedly connected, once the torque is not tightened or the torque decays as the installation time increases, the contact resistance at the connection between the OT terminal and the DC-DC converter 01 increases, causing the connection to heat up or even catch fire, leading to serious safety accidents.

[0031] Based on this, the present application proposes a DC-DC converter protection system to protect the output interface of the DC-DC converter to avoid safety accidents such as heating or even fire, thereby ensuring the safe operation of the DC-DC converter 01.

[0032] Hereinafter, one or more specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0033] like Figure 2 and Figure 3 As shown, the present application provides a DC-DC converter protection system, comprising:

[0034] Battery 10;

[0035] The converter housing 20 includes a housing output end 21;

[0036] The DC-DC conversion module 30 is located in the converter housing 20 and includes a conversion enable control 31 and a conversion output terminal 32. The conversion output terminal 32, the housing output terminal 21, and the battery 10 are sequentially connected to form an output loop 40.

[0037] A protection circuit 50 is connected in parallel with the output circuit 40 and includes a protection circuit input terminal 51 and a protection circuit output terminal 52. The protection circuit input terminal 51 is located between the conversion output terminal 32 and the housing output terminal 21. The protection circuit output terminal 52 is connected to the battery 10.

[0038] The protection circuit 50 is provided with a monitoring device 53, which is connected to the conversion enable control 31. When the electrical signal of the protection circuit 50 exceeds a preset value, the conversion enable control 31 is turned off to control the DC-DC conversion module 30 to be turned off.

[0039] Specifically, the DC-DC conversion module 30 charges the battery 10 through the output circuit 40. The DC-DC conversion module 30 is located in the converter housing 20. The housing output end 21 is the output end of the DC-DC converter 01, and is provided with an output port (i.e., OT terminal) to facilitate connection with the battery 10.

[0040] The protection circuit 50 is connected in parallel with the output circuit 40, and the protection circuit input end 51 is located between the conversion output end 32 and the housing output end 21, that is, the protection circuit input end 51 is located in the converter housing 20, and the protection circuit output end 52 is connected to the battery 10, that is, the protection circuit 50 is connected in parallel with the housing output end 21, so that when the OT terminal on the housing output end 21 is loose and the resistance increases, most of the current on the output circuit 40 bypasses the housing output end 21 and passes through the protection circuit. The protection circuit 50 flows into the battery 10, so the current on the protection circuit 50 increases. When the monitoring device 53 located on the protection circuit 50 monitors that the electrical signal on the protection circuit 50 exceeds a preset value, the conversion enable control 31 of the DC-DC conversion module 30 is turned off, and then the DC-DC conversion module 30 is turned off and stops supplying power to the battery 10. This can avoid accidents such as heating or fire at the OT terminal on the output end 21 of the shell due to increased resistance, thereby protecting the DC-DC converter 01.

[0041] Exemplarily, the monitoring device 53 is a current sensor, and the preset value is 10 amperes (hereinafter referred to as A), that is, when the monitoring device 53 obtains that the current on the protection circuit 50 is greater than or equal to 10 A, the conversion enable control 31 is turned off.

[0042] In this embodiment, a protection circuit 50 is provided in parallel with the output circuit 40, and a monitoring device 53 connected to the conversion enable control 31 is provided on the protection circuit 50. When the output interface connection of the housing output end 21 becomes loose and causes the resistance of the output circuit 40 to increase, the monitoring device 53 can detect that the current on the protection circuit 50 increases to exceed a preset value, and the conversion enable control 31 is turned off, thereby controlling the DC-DC conversion module 30 to be turned off, thereby preventing the DC-DC conversion module 30 from continuing to output to the output circuit 40 after being turned off. This can prevent the output interface of the housing output end 21 located on the output circuit 40 from heating or catching fire, and prevent the DC-DC converter 01 from being damaged due to heating or catching fire on the output interface, which is beneficial to extending the service life of the DC-DC converter 01. In addition, the protection circuit 50 and the monitoring device 53 are simple to set up, which facilitates the promotion and application of the DC-DC converter protection system.

[0043] In some embodiments, as Figure 2 As shown, the protection system further includes an auxiliary module 60, which is located in the converter housing 20 and includes an auxiliary input terminal 61. The converter housing 20 includes an auxiliary power supply terminal 22. The auxiliary input terminal 61, the auxiliary power supply terminal 22, and the battery 10 are connected in sequence to form an auxiliary loop 62.

[0044] The protection circuit output terminal 52 is located between the auxiliary input terminal 61 and the auxiliary power supply terminal 22 to be connected to the battery 10 through the auxiliary circuit 62 .

[0045] Specifically, the startup of the DC-DC conversion module 30 depends on the auxiliary module 60. The auxiliary module 60 is connected to the conversion enable control 31 of the DC-DC conversion module 30. When the auxiliary circuit 62 is connected, the battery 10 supplies power to the auxiliary module 60, and the auxiliary module 60 turns on the conversion enable control 31, that is, turns on the DC-DC conversion module 30.

[0046] Specifically, the battery 10 supplies power to the auxiliary module 60 through the auxiliary circuit 62 . The auxiliary module 60 is located in the converter housing 20 . The auxiliary input terminal 61 is located in the converter housing 20 and is connected to the battery 10 through the auxiliary power supply terminal 22 .

[0047] The protection circuit output end 52 is located between the auxiliary input end 61 and the auxiliary power supply end 22 and is connected to the battery 10 through the auxiliary circuit 62 . That is, the protection circuit output end 52 is located inside the converter housing 20 , which simplifies the arrangement of the protection circuit 50 .

[0048] It should be noted that this connection mode of the protection circuit 50 can increase the current of the protection circuit 50 when the connection of the shell output terminal 21 becomes loose. The principle is: the current flowing through the shell output terminal 21 is I1, the resistance is R1, the current flowing through the protection circuit 50 is I2, the current flowing through the auxiliary module 60 is I3, and the resistance of the auxiliary module 60 is R3. , U is the output voltage of the DC-DC conversion module 30, which is the same as the output voltage of the battery 10. Therefore, when the connection of the housing output terminal 21 is loose, the resistance R1 increases, and the output power of the battery 10 remains unchanged, then I3 and R3 remain unchanged. It can be concluded from the above formula that I2 increases.

[0049] In this embodiment, the protection circuit 50 is connected to the auxiliary circuit 62 located in the converter housing 20, and is connected to the battery 10 through the auxiliary circuit 62 to achieve parallel connection with the output circuit 40. This simplifies the setting of the protection circuit 50, facilitates user operation, and is simple and effective, suitable for promotion and application.

[0050] In some embodiments, as Figure 3 As shown, the protection circuit output terminal 52 is located between the housing output terminal 21 and the battery 10 to be connected to the battery 10 through the output circuit 40 .

[0051] Specifically, the protection circuit output end 52 is located between the shell output end 21 and the battery 10, so that the protection circuit 50 is connected to the battery 10 through the output circuit 40 without affecting the parallel connection of the protection circuit 50 and the shell output end 21. When the OT terminal on the shell output end 21 is loose and the resistance increases, most of the current on the output circuit 40 bypasses the shell output end 21 and flows into the battery 10 through the protection circuit 50. Therefore, the current on the protection circuit 50 increases. When the monitoring device 53 on the protection circuit 50 monitors that the electrical signal on the protection circuit 50 exceeds a preset value, the conversion enable control 31 of the DC-DC conversion module 30 is turned off, and then the DC-DC conversion module 30 is turned off and stops supplying power to the battery 10. This can avoid accidents such as heating or fire at the OT terminal on the shell output end 21 due to increased resistance, thereby protecting the DC-DC converter 01.

[0052] In this embodiment, the protection circuit 50 is independently provided in parallel with the shell output terminal 21 on the output circuit 40, which can protect the shell output terminal 21 without affecting other circuits, is easy to install, and is conducive to promotion and application.

[0053] In some embodiments, as Figure 3 As shown, the converter housing 20 includes a signal plug-in terminal 23 , and the protection circuit input terminal 51 , the signal plug-in terminal 23 and the protection circuit output terminal 52 are sequentially connected to form the protection circuit 50 .

[0054] Specifically, the protection circuit output end 52 is located between the shell output end 21 and the battery 10, that is, located outside the converter shell 20, and the protection circuit input end 51 is located between the conversion output end 32 and the shell output end 21, that is, located inside the converter shell 20, so the protection circuit 50 needs to be set through the converter shell 20.

[0055] Based on this, the protection circuit 50 is connected by utilizing the signal plug-in terminal 23 on the converter housing 20. The connection of the signal plug-in terminal 23 is stable, which not only facilitates the protection circuit 50 to pass through the converter housing 20, but also avoids the increase of contact resistance on the protection circuit 50, which is beneficial to the safety of the protection circuit 50.

[0056] Exemplarily, the signal plug-in terminal 23 is a signal plug-in component, and the protection circuit 50 located outside the converter housing 20 is plugged into the signal plug-in component by providing an interface adapted to the signal plug-in component to connect the protection circuit 50 .

[0057] In some embodiments, as Figure 3 As shown, the protection circuit 50 is provided with a first fuse 54 , which is located between the signal plug-in terminal 23 and the protection circuit output terminal 52 , and the monitoring device 53 is located between the protection circuit input terminal 51 and the signal plug-in terminal 23 .

[0058] Specifically, the protection circuit 50 includes a first part located inside the converter housing 20 and a second part located outside the converter housing 20. The first fuse 54 is located between the signal plug-in terminal 23 and the protection circuit output terminal 52, that is, located on the second part of the protection circuit 50. The monitoring device 53 is located between the protection circuit input terminal 51 and the signal plug-in terminal 23, that is, located on the first part of the protection circuit 50. The monitoring device 53 is located inside the converter housing 20, which facilitates the connection between the monitoring device 53 and the conversion enable control 31 located inside the converter housing 20, which is conducive to simplifying installation; the first fuse 54 is located outside the converter housing 20, which can not only protect the protection circuit 50 to prevent the protection circuit 50 from burning when the current on the protection circuit 50 increases, but also facilitate the user to replace the first fuse 54. The user does not need to disassemble the converter housing 20 to complete the replacement of the first fuse 54.

[0059] In some embodiments, as Figure 2 As shown, the auxiliary module 60 includes a DC-DC controller 63 connected to the auxiliary input terminal 61. The DC-DC controller 63 is connected to the conversion enable control 31 and turns on the conversion enable control 31 when receiving the electrical signal transmitted by the auxiliary input terminal 61 to control the DC-DC conversion module 30 to turn on.

[0060] The DC-DC controller 63 is connected to the monitoring device 53 and turns off the conversion enable control 31 to control the DC-DC conversion module 30 to turn off when the electrical signal of the protection circuit 50 transmitted by the monitoring device 53 exceeds a preset value.

[0061] Specifically, the auxiliary module 60 is a startup module of the DC-DC conversion module 30. When the auxiliary circuit 62 is connected, the DC-DC controller 63 receives the electrical signal transmitted by the auxiliary circuit 62, that is, turns on the conversion enable control 31 of the DC-DC conversion module 30. Accordingly, the DC-DC conversion module 30 is turned on and the output circuit 40 is connected.

[0062] The monitoring device 53 is connected to the conversion enable control 31 through the DC-DC controller 63. The monitoring device 53 sends the electrical signal obtained on the protection circuit 50 to the DC-DC controller 63 in real time. When the electrical signal obtained on the protection circuit 50 exceeds a preset value, the DC-DC controller 63 controls the conversion enable control 31 to be turned off, thereby realizing the connection control between the monitoring device 53 and the conversion enable control 31.

[0063] Exemplarily, the monitoring device 53 is a current sensor, which sends the current value on the protection circuit 50 sensed in real time to the DC-DC controller 63. The DC-DC controller 63 judges the received current value. The preset value is 10 amps. When the received current value exceeds 10 amps, the conversion enable control 31 is turned off, and then the DC-DC conversion module 30 is turned off.

[0064] In this embodiment, the monitoring device 53 utilizes the DC-DC controller 63 in the auxiliary module 60 connected to the conversion enable control 31 to be connected to the conversion enable control 31 to control the DC-DC conversion module 30 to be shut down, which can not only protect the output circuit 40 and the shell output end 21 on the output circuit 40, but also simplify the setting of the protection circuit 50, which is conducive to the promotion and application of the DC-DC converter protection system.

[0065] In some embodiments, the cross-sectional area of the protection circuit 50 is smaller than the cross-sectional area of the output circuit 40 .

[0066] Specifically, the cross-sectional area of the wires on the protection circuit 50 is smaller than the cross-sectional area of the wires on the output circuit 40. If the wires on the protection circuit 50 and the output circuit 40 are both round wires, the wires on the protection circuit 50 are thinner than the wires on the output circuit 40.

[0067] Exemplarily, the wires on the protection circuit 50 and the output circuit 40 both include multiple strands of copper wires. When the cross-sectional areas of the copper wires are the same, the number of copper wire strands on the protection circuit 50 is smaller than that on the output circuit 40 .

[0068] In this embodiment, the cross-sectional area of the protection circuit 50 is set to be smaller than the cross-sectional area of the output circuit 40. This allows most of the current to be output to the battery 10 through the output circuit 40 when there is no abnormality in the output circuit 40, thereby ensuring the normal operation of the output circuit 40 and preventing the protection circuit 50 from significantly shunting the output circuit 40 and affecting the output power of the DC-DC conversion module 30 to the battery 10.

[0069] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 As shown, a second fuse 64 is provided on the auxiliary circuit 62 , and the second fuse 64 is located between the auxiliary power supply terminal 22 and the battery 10 .

[0070] Specifically, the second fuse 64 is provided to protect the auxiliary circuit 62 . The second fuse 64 is provided between the auxiliary power supply terminal 22 and the battery 10 , that is, the second fuse 64 is provided outside the converter housing 20 , so that the user can easily replace the second fuse 64 .

[0071] In addition, when the protection circuit output end 52 is arranged between the auxiliary input end 61 and the auxiliary power supply end 22, that is, when the protection circuit 50 is connected to the battery 10 through the auxiliary circuit 62, the second fuse 64 can also protect the protection circuit 50 and the auxiliary circuit 62 at the same time.

[0072] In some embodiments, the auxiliary module 60 further includes an auxiliary power supply 65 , the input end of the auxiliary power supply 65 is connected to the battery 10 through the auxiliary input end 61 , and the output end of the auxiliary power supply 65 is connected to the DC-DC controller 63 .

[0073] Specifically, the auxiliary power supply 65 is a voltage converter, which can convert the voltage transmitted by the battery 10 into multiple small voltages and transmit them.

[0074] The auxiliary power supply 65 transmits a voltage to the DC-DC controller 63 . The DC-DC controller 63 may receive an electrical signal and start the conversion enable control 31 to start the DC-DC conversion module 30 .

[0075] Correspondingly, the load 66 is also connected to the auxiliary voltage 65 and in parallel with the DC-DC controller 63. The voltage transmitted from the auxiliary power supply 65 to the load 66 can enable the load 66 to drive the low-voltage electrical appliances on the vehicle connected thereto to start, that is, when the low-voltage electrical appliances on the vehicle are started, the DC-DC conversion module 30 is started.

[0076] Based on the same inventive concept, the present invention also provides a vehicle, comprising a DC-DC converter protection system as described in any one of the above items, the technical effects of which are the same as those of the above DC-DC converter protection system, and will not be repeated here.

[0077] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0078] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A DC-DC converter protection system, characterized in that: include: batteries; A converter housing, including a housing output end; A DC-DC conversion module is located in the converter housing and includes a conversion enable control and a conversion output terminal. The conversion output terminal, the housing output terminal, and the battery are sequentially connected to form an output loop. a protection circuit connected in parallel with the output circuit, comprising a protection circuit input end and a protection circuit output end, wherein the protection circuit input end is located between the conversion output end and the housing output end, and the protection circuit output end is connected to the battery; Wherein, a monitoring device is provided on the protection circuit, and the monitoring device is connected to the conversion enable control. When the electrical signal of the protection circuit exceeds a preset value, the conversion enable control is turned off to control the DC-DC conversion module to be turned off.

2. The DC-DC converter protection system according to claim 1, wherein: The converter further includes an auxiliary module, the auxiliary module being located in the converter housing and including an auxiliary input terminal, the converter housing including an auxiliary power supply terminal, the auxiliary input terminal, the auxiliary power supply terminal, and the battery being connected in sequence to form an auxiliary circuit; The protection circuit output end is located between the auxiliary input end and the auxiliary power supply end so as to be connected to the battery through the auxiliary circuit.

3. The DC-DC converter protection system according to claim 1, wherein: The protection circuit output end is located between the housing output end and the battery so as to be connected to the battery through the output circuit.

4. The DC-DC converter protection system according to claim 3, wherein: The converter housing includes a signal plug-in terminal, and the protection circuit input terminal, the signal plug-in terminal and the protection circuit output terminal are connected in sequence to form the protection circuit.

5. The DC-DC converter protection system according to claim 4, characterized in that: The protection circuit is provided with a first fuse, which is located between the signal plug-in terminal and the protection circuit output terminal. The monitoring device is located between the protection circuit input terminal and the signal plug-in terminal.

6. The DC-DC converter protection system according to claim 2, wherein: The auxiliary module includes a DC-DC controller connected to the auxiliary input terminal, the DC-DC controller is connected to the conversion enable control, and when receiving the electrical signal transmitted by the auxiliary input terminal, turns on the conversion enable control to control the DC-DC conversion module to turn on; The DC-DC controller is connected to the monitoring device, and when the electrical signal of the protection circuit transmitted by the monitoring device exceeds a preset value, the DC-DC controller turns off the conversion enable control to control the DC-DC conversion module to turn off.

7. The DC-DC converter protection system according to claim 1, wherein: The cross-sectional area of the protection circuit is smaller than the cross-sectional area of the output circuit.

8. The DC-DC converter protection system according to claim 2, wherein: The auxiliary circuit is provided with a second fuse, and the second fuse is located between the auxiliary power supply end and the battery.

9. The DC-DC converter protection system according to claim 6, wherein: The auxiliary module further includes an auxiliary power supply, an input end of the auxiliary power supply is connected to the battery through the auxiliary input end, and an output end of the auxiliary power supply is connected to the DC-DC controller.

10. A vehicle, characterized in that: The invention comprises a DC-DC converter protection system as claimed in any one of claims 1 to 9.

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