Unlocking device and method for releasing electronic parking
By controlling the current direction by the power module and switching module of the unlocking device, the complex operation problem when the electronic parking cannot be released is solved, and a simple and efficient unlocking process is achieved.
Patent Information
- Application Number
- CN202510900171.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-08-19
AI Technical Summary
In the prior art, when the electronic parking cannot be released, the release method is complicated and difficult to operate, and requires the wheel to be removed and manual adjustment calipers are required.
An unlocking device is provided, including a power supply module, a first and a second branch circuit and a switching module. By controlling the current direction by the switching module, a loop is formed to control the caliper release action to avoid unclear direction of unlocking the locking current.
The process of resolving electronic parking faults is simplified, and it saves time and manpower. It can remove electronic parking without removing wheels.
Smart Images
Figure CN120503760A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to an unlocking device and a method for releasing electronic parking. Background Art
[0002] During vehicle use, the electronic hold may fail to release due to various reasons. This means that even after the electronic hold is engaged, the locked wheel caliper may not release. In related art, in such cases, the vehicle must be lifted, the locked wheel removed, and the caliper manually adjusted to release the locked wheel. The wheel can then be reinstalled on the vehicle. This method is difficult and complex to operate, as it requires removing the wheel from the vehicle and then manually adjusting the caliper to release the locked wheel. Summary of the Invention
[0003] In view of this, the embodiments of the present application provide an unlocking device and a method for releasing electronic parking to solve the problem in the related art that when the electronic parking cannot be released, the method for releasing the electronic parking is difficult and complicated to operate.
[0004] The embodiments of the present application are implemented using the following technical solutions: In a first aspect, an unlocking device is provided, comprising: A power module having a positive output terminal and a negative output terminal for providing an unlocking current; A first branch having a first connection end and a second connection end, wherein the first connection end of the first branch is used to connect to the first access end of the caliper on the wheel to be unlocked; a second branch having a third connection end and a fourth connection end, wherein the third connection end of the second branch is used to connect to the second access end of the caliper on the wheel to be unlocked; A switching module is used to control the connection between the positive output terminal and one of the second connection terminal of the first branch and the fourth connection terminal of the second branch, and to control the connection between the negative output terminal and the other of the second connection terminal of the first branch and the fourth connection terminal of the second branch.
[0005] Optionally, the switching module includes a first contact, a second contact, a third contact, a fourth contact, a fifth contact, and a sixth contact; the first branch has two second connection terminals, and the second branch has two fourth connection terminals; The first contact is connected to the positive output terminal; the second contact is connected to the negative output terminal; the third contact is connected to a second connection terminal of the first branch, and the fourth contact is connected to a fourth connection terminal of the second branch; the fifth contact is connected to the other second connection terminal of the first branch, and the sixth contact is connected to the other fourth connection terminal of the second branch.
[0006] Optionally, the switching module is a double-pole double-throw switch.
[0007] Optionally, the number of first connection ends of the first branch is N, and the number of third connection ends of the second branch is N; N is a positive integer; the unlocking device also includes M wiring harness connectors; one end of the wiring harness connector is respectively connected to a first connection end and a third connection end, and the other end of the wiring harness connector is used to connect to the first access end and the second access end of the caliper; M is a positive integer, M≤N; wherein different wiring harness connectors are used to adapt to different calipers.
[0008] Optionally, M=N-1.
[0009] Optionally, the power supply module includes a DC power supply, or includes multiple DC power supplies connected in series.
[0010] Optionally, the unlocking device further includes an overcurrent protection module, and the overcurrent protection module is used to disconnect the circuit where the unlocking device is located when the current value of the unlocking current exceeds a current threshold.
[0011] In a second aspect, a method for releasing electronic parking brake is provided, comprising: Provide an unlocking device; Disconnecting the electronic parking control device in the vehicle to be unlocked from the first access end and the second access end of the caliper on the wheel to be unlocked; the wheel to be unlocked is a wheel on the vehicle to be unlocked; Connecting the first connection end of the first branch of the unlocking device to the first access end, and connecting the third connection end of the second branch of the unlocking device to the second access end; The switching module in the unlocking device is operated to control the caliper to perform a release action through the unlocking current output by the power module in the unlocking device.
[0012] Optionally, the switching module is a double-pole double-throw switch; The step of operating the switching module in the unlocking device to control the caliper to perform a release action through the unlocking current output by the power module in the unlocking device includes: Toggling the double-pole double-throw switch in a first direction; If the caliper does not perform a release action within a preset time period after the double-pole double-throw switch is toggled in a first direction, the double-pole double-throw switch is toggled in a second direction; the second direction is opposite to the first direction.
[0013] Optionally, before disconnecting the electronic parking control device in the vehicle to be unlocked from the first access end and the second access end of the caliper on the wheel to be unlocked, the method further includes: disconnecting the connection between the on-board power supply in the vehicle to be unlocked and the electronic parking control device.
[0014] In the present application, by connecting the first connection end of the first branch of the unlocking device to the first access end of the caliper on the wheel to be unlocked, and by connecting the third connection end of the second branch to the second access end of the caliper on the wheel to be unlocked, a switching module in the unlocking device can be operated to form a circuit between the unlocking device and the caliper on the wheel to be unlocked. In this way, the unlocking current provided by the power module can be used to control the caliper to release, thereby unlocking the electronic parking brake. Furthermore, by operating the switching module in the unlocking device, the direction of the unlocking current flowing into the caliper can be switched. Therefore, even if the direction of the control current used by the caliper to lock the wheel is unknown, that is, it may be unclear whether the current flowing from the first access end of the caliper is a forward current or from the second access end of the caliper is a forward current, the unlocking device provided by the present application can be used to control the caliper to release, thereby releasing the vehicle's electronic parking brake. This eliminates the need to remove the wheel from the vehicle, making the method for resolving the vehicle's electronic parking brake fault more convenient and efficient, with simple operation, saving both time and manpower.
[0015] These and other aspects of the present application will become more readily apparent from the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 Schematic diagram of an unlocking device according to an embodiment of the present application.
[0018] Figure 2 is a schematic diagram of an unlocking device according to another embodiment of the present application.
[0019] Figure 3 is a schematic diagram of an unlocking device according to another embodiment of the present application.
[0020] Figure 4 is a schematic diagram of an unlocking device according to another embodiment of the present application.
[0021] Figure 5 is a schematic diagram of an unlocking device according to another embodiment of the present application.
[0022] Figure 6 is a schematic diagram of a power module according to another embodiment of the present application.
[0023] Figure 7 FIG. 4 is a flowchart of a method for releasing electronic parking according to an embodiment of the present application. DETAILED DESCRIPTION
[0024] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0025] In order to enable those skilled in the art to better understand the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0026] In the following description, the terms "first\second" and the like are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first\second" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.
[0027] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.
[0028] The term "plurality" as used herein refers to two or more. "And / or" describes the association relationship between associated objects, indicating that three possible relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. In the following description, references to "some embodiments or some embodiments" describe a subset of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
[0029] Figure 1 FIG is a schematic diagram of an unlocking device according to an embodiment of the present application. Figure 1 As shown, the unlocking device 100 includes a power module 110 , a switching module 120 , a first branch 130 and a second branch 140 .
[0030] The power module 110 has a positive output terminal 111 and a negative output terminal 112, and is used to provide an unlocking current. The unlocking current output by the power module can be a DC current. Because this unlocking current is used to control the release of the caliper on the wheel to be unlocked, the voltage output by the power module meets the driving voltage requirements of the caliper. For example, if the caliper requires a driving voltage of 12V, the power module can be a 12V DC power supply.
[0031] The first branch 130 has a first connection end 132 and a second connection end 131 . The first connection end 132 of the first branch 130 is used to connect to the first access end 211 of the caliper on the wheel to be unlocked.
[0032] The second branch 140 has a third connection end 142 and a fourth connection end 141 . The third connection end 142 of the second branch 140 is used to connect to the second access end 212 of the caliper on the wheel to be unlocked.
[0033] The switching module 120 is used to control the positive output terminal 111 to be connected to one of the second connection terminal 131 of the first branch 130 and the fourth connection terminal 141 of the second branch 140, and to control the negative output terminal 112 to be connected to the other of the second connection terminal 131 of the first branch 130 and the fourth connection terminal 141 of the second branch 140.
[0034] The first access port 211 and the second access port 212 of the caliper are its two control ports. One of the first access port 211 and the second access port 212 is a positive access port, and the other is a negative access port. The first branch 130 and the second branch 140 are two lines used to form a loop with the caliper. One of the first branch 130 and the second branch 140 is used to input the unlocking current into the caliper, and the other is used to output the unlocking current from the caliper.
[0035] In the present application, the positive output terminal 111 can be connected to the second connection terminal 131 of the first branch 130, and the negative output terminal 112 can be connected to the fourth connection terminal 141 of the second branch 140 by operating the switching module; or, the positive output terminal 111 can be connected to the fourth connection terminal 141 of the second branch 140, and the negative output terminal 112 can be connected to the second connection terminal 131 of the first branch 130 by operating the switching module.
[0036] It can be understood that when the positive output terminal 111 is connected to the second connection terminal 131 of the first branch 130 and the negative output terminal 112 is connected to the fourth connection terminal 141 of the second branch 140, if the first connection terminal 132 of the first branch 130 is connected to the first access terminal 211 of the caliper on the wheel to be unlocked, and the third connection terminal 142 of the second branch 140 is connected to the second access terminal 212 of the caliper, the unlocking device and the caliper form a circuit. In this case, the unlocking current flows from the first branch 130 into the caliper and out of the caliper through the second branch 140.
[0037] Similarly, when the positive output terminal 111 is connected to the fourth connection terminal 141 of the second branch 140 and the negative output terminal 112 is connected to the second connection terminal 131 of the first branch 130, if the first connection terminal 132 of the first branch 130 is connected to the first inlet terminal 211 of the caliper on the wheel to be unlocked, and the third connection terminal 142 of the second branch 140 is connected to the second inlet terminal 212 of the caliper, the unlocking device also forms a circuit with the caliper. In this case, the unlocking current flows from the second branch 140 into the caliper and out of the caliper through the first branch 130.
[0038] For vehicles, the principle of the electronic parking control device in the vehicle to control the calipers on the wheels is: the electronic parking control device provides a forward current, and the calipers on the wheels will perform a clamping action to lock the wheels; conversely, a reverse current is provided (that is, a control current in the opposite direction of the current that controls the calipers to perform the clamping action), and the calipers on the wheels will perform a release action.
[0039] In the event that an abnormality occurs in the electronic parking control device on the vehicle, resulting in the inability to release the electronic parking control device after the wheel is locked (i.e., the caliper cannot be controlled to release the wheel), the unlocking device provided in the present application can be used to connect the first connection end 132 of the first branch 130 in the unlocking device to the first access end 211 of the caliper, and the third connection end 142 of the second branch 140 to the second access end 212 of the caliper. In this way, the unlocking device and the caliper can form a loop, and the unlocking current can flow into the caliper to control the caliper through the unlocking current, so that the caliper performs a release action to release the wheel.
[0040] In addition, after the caliper locks the wheel, the direction of the control current used to lock the wheel may not be known, that is, in practice it may not be clear whether the current flowing in from the first access terminal of the caliper is a positive current or the current flowing in from the second access terminal of the caliper is a positive current. Correspondingly, the direction of the negative current cannot be obtained. Therefore, the switching module in the unlocking device provided in the present application can be used to switch the direction of the unlocking current flowing into the caliper (that is, switch to flow from the first access terminal 211 of the caliper, or flow from the second access terminal 212 of the caliper) by operating the switching module. Thus, by switching the direction of the unlocking current flowing into the caliper, it can be ensured that the unlocking current is the negative current required to unlock the caliper.
[0041] For example, if when operating the switching module, the unlocking current flows into the caliper from the first access terminal 211 of the caliper, if it is found that the caliper does not perform the release action, it indicates that the unlocking current flowing into the caliper at this time is a positive current. Afterwards, the switching module can be operated again to make the unlocking current flow into the caliper from the second access terminal 212 of the caliper, ensuring that the unlocking current at this time is the negative current required for the caliper to perform the release action.
[0042] In the present application, by connecting the first connection end of the first branch of the unlocking device to the first access end of the caliper on the wheel to be unlocked, and by connecting the third connection end of the second branch to the second access end of the caliper on the wheel to be unlocked, a switching module in the unlocking device can be operated to form a circuit between the unlocking device and the caliper on the wheel to be unlocked. In this way, the unlocking current provided by the power module can be used to control the caliper to release, thereby unlocking the electronic parking brake. Furthermore, by operating the switching module in the unlocking device, the direction of the unlocking current flowing into the caliper can be switched. Therefore, even if the direction of the control current used by the caliper to lock the wheel is unknown, that is, it may be unclear whether the current flowing from the first access end of the caliper is a forward current or from the second access end of the caliper is a forward current, the unlocking device provided by the present application can be used to control the caliper to release, thereby releasing the vehicle's electronic parking brake. This eliminates the need to remove the wheel from the vehicle, making the method for resolving the vehicle's electronic parking brake fault more convenient and efficient, with simple operation, saving both time and manpower.
[0043] Figure 2 is a schematic diagram of an unlocking device according to another embodiment of the present application, as shown in FIG. Figure 2 As shown, the switching module 120 includes a first contact 121, a second contact 122, a third contact 123, a fourth contact 124, a fifth contact 125 and a sixth contact 126; the second connection ends of the first branch 130 are two, and the two second connection ends of the first branch are Figure 2 The second connection terminal 131-1 and the second connection terminal 131-2 are shown in FIG.
[0044] There are two fourth connection ends of the second branch, namely Figure 2 The fourth connection terminal 141-1 and the fourth connection terminal 141-2 are shown in FIG.
[0045] The first contact 121 is connected to the positive output terminal 111; the second contact 122 is connected to the negative output terminal 112; the third contact 123 is connected to a second connection terminal ( Figure 2 The fourth contact 124 is connected to a fourth connection terminal ( Figure 2 The fourth connection terminal 141-1 is shown in FIG; the fifth contact 125 is connected to another second connection terminal of the first branch 130 (eg Figure 2 The sixth contact 126 is connected to the second connection end 131-2 of the second branch 140 (eg Figure 2 The fourth connection terminal 141-2) is connected.
[0046] In this way, the switching module 120 can be operated to connect the first contact 121 with the fourth contact 124 and the second contact 122 with the fifth contact 125, thereby connecting the positive output terminal 111 with the second branch 140 and the negative output terminal 112 with the first branch 130. Alternatively, the switching module 120 can be operated to connect the first contact 121 with the third contact 123 and the second contact 122 with the sixth contact 126, thereby connecting the positive output terminal 111 with the first branch 130 and the negative output terminal 112 with the second branch 140.
[0047] In some embodiments, the switch module 120 is a double-pole double-throw switch, for example Figure 2 The switching module 120 shown in FIG is a double-pole double-throw switch. Thus, by flipping the double-pole double-throw switch once, the positive output terminal 111 is connected to the second branch 140 and the negative output terminal 112 is connected to the first branch 130. Alternatively, the positive output terminal 111 is connected to the first branch 130 and the negative output terminal 112 is connected to the second branch 140. Operation is simple and quick. Of course, the double-pole double-throw switch can also be pulled up to disconnect the first contact from either the third or fourth contact, and disconnect the second contact from either the fifth or sixth contact. In this way, the circuit between the unlocking device and the caliper is disconnected.
[0048] In other embodiments, Figure 3 As shown, the switching module 120 includes a first single-pole double-throw switch 120-1 and a second single-pole double-throw switch 120-2. The first contact 121, the third contact 123, and the fourth contact 124 are contacts on the first single-pole double-throw switch 120-1, and the second contact 122, the fifth contact 125, and the sixth contact 126 are contacts on the second single-pole double-throw switch 120-2. Thus, the first single-pole double-throw switch 120-1 can be operated to connect the first contact 121 with the third contact 123, and the second single-pole double-throw switch 120-2 can be operated to connect the second contact 122 with the sixth contact 126, thereby connecting the positive output terminal 111 with the first branch 130 and the negative output terminal 112 with the second branch 140.
[0049] Similarly, the first single-pole double-throw switch 120-1 can be operated to connect the first contact 121 with the fourth contact 124, and the second single-pole double-throw switch 120-2 can be operated to connect the second contact 122 with the fifth contact 125, so as to connect the positive output terminal 111 with the second branch 140 and the negative output terminal 112 with the first branch 130.
[0050] Similarly, the first single-pole double-throw switch 120-1 can be pulled up so that the first contact 121 is not connected to any of the third contact 123 and the fourth contact 124, and the second single-pole double-throw switch 120-2 can be pulled up so that the second contact 122 is not connected to any of the fifth contact 125 and the sixth contact 126.
[0051] In some embodiments, there are N first connection ends 132 of the first branch 130 and N third connection ends 142 of the second branch 140; N is a positive integer; the unlocking device 100 also includes M wiring harness connectors; one end of the wiring harness connector is respectively connected to a first connection end 132 and a third connection end 142, and the other end of the wiring harness connector is used to connect to the first access end 211 and the second access end 212 of the caliper; M is a positive integer, M≤N; wherein different wiring harness connectors are used to adapt to different calipers.
[0052] Among them, the N first connection ends 132 on the first branch 130 are connected in parallel, and the N third connection ends 142 on the second branch 140 are connected in parallel. In this way, the caliper can form a loop with the unlocking device 100 by connecting to any first connection end 132 on the first branch 130 and any third connection end 142 on the second branch 140.
[0053] In some cases, a wiring harness connector is provided on the caliper, and a wiring harness connector is also provided on the vehicle's electronic parking control device. The wiring harness connector on the caliper and the wiring harness connector on the electronic parking control device are used in pairs and can be connected to each other (for example, the pin in the wiring harness connector on the caliper mates with the socket in the wiring harness connector on the electronic parking control device). In this case, the first access end and the second access end on the caliper have been pre-connected to the wiring harness connector on the caliper, which is equivalent to connecting the caliper and the electronic parking control device through the wiring harness connector on the caliper and the wiring harness connector on the electronic parking control device to form a circuit. Correspondingly, in this case, the unlocking device can provide a wiring harness connector that is used in pairs with the wiring harness connector on the caliper, so that the wiring harness connector on the unlocking device can be subsequently connected to the wiring harness connector on the caliper to achieve the connection of the first branch with the first access end on the caliper and the connection of the second branch with the second access end on the caliper.
[0054] By providing one or more wiring harness connectors on the unlocking device that are paired with the wiring harness connector on the caliper, the wiring harness connector on the caliper can be connected to the wiring harness connector on the unlocking device. In this way, the connection operation between the unlocking device and the caliper can be more convenient and quick without the need for complicated wiring operations.
[0055] Since the wiring harness connectors on different models of calipers may be different, M can be greater than 1. In this way, multiple optional wiring harness connectors are provided on the unlocking device, so that the unlocking device can be used to control the release action of multiple different models of calipers.
[0056] In some embodiments, when M<N, M can be equal to N-1, which is equivalent to reserving a first connection end and a third connection end as free connection ends of the swing line for connecting to the first access end and the second access end on any caliper. In other words, when the wiring harness connector provided by the unlocking device does not contain a wiring harness connector that is compatible with the caliper on the vehicle currently to be unlocked, the first connection end as the free connection end of the swing line can be directly connected to the first access end on the caliper, and the third connection end as the free connection end of the swing line can be directly connected to the second access end on the caliper. In this way, when there is no wiring harness connector in the unlocking device that is used in conjunction with the wiring harness connector on the current caliper, the caliper can be connected through the reserved swing line, thereby ensuring that the caliper can be controlled to perform the release action.
[0057] Figure 4 is a schematic diagram of an unlocking device according to another embodiment of the present application, Figure 4 In the embodiment of FIG, three first connection terminals (i.e., first connection terminals 132-1, 132-2, and 132-3) on the first branch 130 are exemplarily shown, and three third connection terminals (i.e., third connection terminals 142-1, 142-2, and 142-3) on the second branch 140 are exemplarily shown. Figure 4 In the illustrated embodiment, the number of wiring harness connectors in the unlocking device (two) is less than the number of third connection ends (three). The two wiring harness connectors, namely a first wiring harness connector 151 and a second wiring harness connector 152, have one end connected to the first connection end 132-2 and the third connection end 142-2, and the other end of the first wiring harness connector 151 is used to connect to the wiring harness connector on the caliper to which it is adapted. One end of the second wiring harness connector 152 is connected to the first connection end 132-2 and the third connection end 142-2. The first connection end 132-1 and the second connection end 142-1 serve as free connection ends for the swing wire, and are used to directly connect to the first and second access ends on the caliper.
[0058] It is worth mentioning that Figure 4 The number of wiring harness connectors in the unlocking device shown is merely an example and should not be considered as limiting the scope of use of this application. In other embodiments, the number of wiring harness connectors in the unlocking device can be set according to actual needs.
[0059] In some embodiments, the power module 110 may include a DC power supply, such as Figure 5 In the embodiment shown, in this case, the voltage of the DC power supply in the power module 110 can be the common control voltage of the caliper. For example, if the common control voltage of the caliper is 24V, the DC power supply in the power module 110 can be a 24V DC power supply.
[0060] In other embodiments, the power supply module 110 may include multiple DC power supplies connected in series. Figure 6 The schematic diagram of the power supply module 110 is shown as an example. Figure 6 In the corresponding embodiment, the power module 110 includes three DC power supplies connected in series, namely DC power supplies 114, 115 and 116. In addition, the power module 110 also includes a sliding control terminal 113, one end of which can move between the multiple DC power supplies connected in series, and the other end of the sliding control terminal 113 can be connected to the positive output terminal 111 or the negative output terminal 112; for example, Figure 6 In the embodiment, the other end of the sliding control terminal 113 is connected to the negative output terminal 112. Thus, the sliding control terminal 113 and the negative output terminal 112 are at the same potential. In this case, the output voltage of the power module 110 is the voltage between the positive output terminal 111 and the sliding control terminal 113. Thus, the output voltage of the power module 110 can be varied by moving the position of the sliding control terminal 113 among the multiple series-connected DC power sources to ensure that the output voltage of the power module 110 meets the required control voltage of the caliper. This allows the unlocking device to be applied to control the release of various calipers requiring different control voltages, broadening its application range.
[0061] In some embodiments, the unlocking device further includes an overcurrent protection module, and the overcurrent protection module is configured to disconnect the circuit in which the unlocking device is located when the current value of the unlocking current exceeds a current threshold.
[0062] The overcurrent protection module may be connected in series to the main circuit of the unlocking device, for example, Figure 5 As shown, the overcurrent protection module 160 is connected in series between the power module 110 and the switching module 120. More specifically, the overcurrent protection module 160 is connected in series between the positive output terminal 111 and the first contact 121 of the switching module 120. In other embodiments, the overcurrent protection module 160 may also be connected in series between the negative output terminal 112 and the second contact 122 of the switching module 120. In some embodiments, the overcurrent protection module 160 may be a fuse.
[0063] The overcurrent protection module in the unlocking device can prevent other components in the unlocking device from being damaged due to excessive current in the circuit where the unlocking device is located, thereby providing overcurrent protection for the components in the unlocking device.
[0064] In some embodiments, when the overcurrent protection module 160 is a fuse, the fuse's melting current threshold can be determined based on the maximum current value of the caliper's control current, and can be, for example, greater than the maximum current value of the caliper's control current. For example, the fuse's melting current value can be 20 A. Furthermore, the specifications of the wires used in the unlocking device, such as the wires connecting the power module 110 and the switching module 120, and the wires in the first branch 130 and the second branch 140, can be selected based on actual needs, such as a wire with a copper wire cross-sectional area of 2.5 mm², and are not specifically limited herein.
[0065] This application also provides a method for releasing electronic parking, such as Figure 7 Shown, including: Step 710: Provide an unlocking device; the unlocking device may be the unlocking device provided by any of the above embodiments.
[0066] Step 720 , disconnecting the electronic parking control device in the vehicle to be unlocked from the first access terminal and the second access terminal of the caliper on the wheel to be unlocked; the wheel to be unlocked is a wheel on the vehicle to be unlocked.
[0067] In some embodiments, the installation location of the electronic parking control device on the vehicle can be confirmed in advance, and is usually arranged inside the front cabin of the vehicle or in the left and right side trims of the trunk.
[0068] In some embodiments, before step 720, the method further includes disconnecting the onboard power supply of the vehicle to be unlocked from the electronic parking control device. This prevents components from being burned out due to inaction during operation. Alternatively, the entire vehicle may be powered off before disconnecting the onboard power supply of the vehicle to be unlocked from the electronic parking control device.
[0069] Step 730: Connect the first connection end of the first branch in the unlocking device to the first access end, and connect the third connection end of the second branch in the unlocking device to the second access end.
[0070] In some embodiments, if a wiring harness connector for connection is provided in the unlocking device, a wiring harness connector that is paired with the wiring harness connector on the caliper can be determined from the wiring harness connectors provided by the unlocking device, so that the first connection end of the first branch is connected to the first access end, and the third connection end of the second branch is connected to the second access end through the wiring harness connector.
[0071] In some embodiments, if there is no harness connector in the unlocking device that is used in conjunction with the harness connector on the caliper, a free connection end (e.g. Figure 4 and Figure 5 The first connecting end 132-1 and the second connecting end 142-1 in the unlocking device are connected to the first access end of the caliper and the second access end of the caliper.
[0072] Generally speaking, the electronic parking control device on the vehicle is connected to the caliper on the wheel through a wiring harness. The vehicle's wiring harness connection diagram can be used to find the hole position of the wiring harness connector that drives the wheel caliper through the electronic parking control device, and then determine the first access end and the second access end of the caliper.
[0073] In some embodiments, before connecting to the first access end and the second access end of the caliper, the status of the wiring harness terminals in the wiring harness connector of the caliper (for example, the wiring harness terminal where the first access end is located and the wiring harness terminal where the second access end is located) can be visually checked to ensure that there are no foreign objects, no burning, and no pin backing out, so as to avoid the unlocking device from not working properly after subsequent connection due to abnormalities in the wiring harness terminals. In this way, the situation where the electronic parking device cannot be unlocked due to poor contact between the wiring harness connector of the caliper and the wiring harness connector of the electronic parking device can be eliminated.
[0074] Step 740 : operating the switching module in the unlocking device to control the caliper to perform a release action through the unlocking current output by the power module in the unlocking device.
[0075] In some embodiments, the switching module is a double-pole double-throw switch; in step 740, it includes: toggling the double-pole double-throw switch in a first direction; if the caliper does not perform a release action within a preset time after toggling the double-pole double-throw switch in the first direction, toggling the double-pole double-throw switch in a second direction; the second direction is opposite to the first direction.
[0076] The first direction may be any direction in which the double-pole double-throw switch can be toggled to connect the circuit. In some embodiments, whether the caliper has performed a release action can be determined by listening to a sound. For example, if a sound of the caliper releasing the wheel is heard, it can be determined that the caliper has performed a release action.
[0077] In some embodiments, after the double-pole double-throw switch is toggled in the first direction or the second direction, the double-pole double-throw switch can be pulled up within a target time (to put the circuit in an open state). The target time can be, for example, 3 seconds. In this way, the circuit is prevented from being in a connected state for too long and damaging the caliper.
[0078] Figure 7 The process shown is a process of releasing one wheel on the vehicle to be unlocked. For the calipers on other wheels on the vehicle to be unlocked, the calipers can be controlled to perform the release action according to the above process.
[0079] In some embodiments, after the calipers on the vehicle release the wheels, the vehicle to be unlocked can be moved to a maintenance site for further maintenance work.
[0080] In the above embodiment, when the vehicle's electronic parking brake cannot be released, the unlocking device provided by this application can be used in accordance with the above method to release the vehicle's electronic parking brake, without having to remove the vehicle's wheel, manually adjust the caliper to release the wheel, and then reinstall the wheel. This method of the application can improve the efficiency of handling the problem of a clamped wheel that cannot be released after an electronic parking brake failure, saving processing time, money, and manpower.
[0081] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.
[0082] Unless otherwise specified, all steps of this application may be performed sequentially or randomly. For example, "the method includes steps A and B" means that the method may include steps A and B performed sequentially, or may include steps B and A performed sequentially. For example, "the method may also include step C" means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or steps A, C, and B, or steps C, A, and B, etc.
[0083] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. An unlocking device, characterized in that: include: A power module having a positive output terminal and a negative output terminal for providing an unlocking current; A first branch having a first connection end and a second connection end, wherein the first connection end of the first branch is used to connect to the first access end of the caliper on the wheel to be unlocked; a second branch having a third connection end and a fourth connection end, wherein the third connection end of the second branch is used to connect to the second access end of the caliper on the wheel to be unlocked; A switching module is used to control the connection between the positive output terminal and one of the second connection terminal of the first branch and the fourth connection terminal of the second branch, and to control the connection between the negative output terminal and the other of the second connection terminal of the first branch and the fourth connection terminal of the second branch.
2. The unlocking device according to claim 1, characterized in that: The switching module includes a first contact, a second contact, a third contact, a fourth contact, a fifth contact and a sixth contact; The first branch has two second connection terminals, and the second branch has two fourth connection terminals; The first contact is connected to the positive output terminal; the second contact is connected to the negative output terminal; the third contact is connected to a second connection terminal of the first branch, and the fourth contact is connected to a fourth connection terminal of the second branch; the fifth contact is connected to the other second connection terminal of the first branch, and the sixth contact is connected to the other fourth connection terminal of the second branch.
3. The unlocking device according to claim 2, characterized in that: The switching module is a double-pole double-throw switch.
4. The unlocking device according to claim 1, characterized in that: The number of first connection terminals of the first branch is N, and the number of third connection terminals of the second branch is N; N is a positive integer; The unlocking device also includes M wiring harness connectors; one end of each wiring harness connector is connected to a first connection end and a third connection end respectively, and the other end of each wiring harness connector is used to connect to the first access end and the second access end of the caliper; M is a positive integer, M≤N; wherein different wiring harness connectors are used to adapt to different calipers.
5. The unlocking device according to claim 4, characterized in that: M=N-1.
6. The unlocking device according to claim 1, characterized in that: The power supply module includes a DC power supply, or includes multiple DC power supplies connected in series.
7. The unlocking device according to claim 1, characterized in that: The unlocking device further includes an overcurrent protection module, which is configured to disconnect the circuit in which the unlocking device is located when the current value of the unlocking current exceeds a current threshold.
8. A method for releasing electronic parking, characterized in that: include: Providing an unlocking device according to any one of claims 1 to 7; Disconnecting the electronic parking control device in the vehicle to be unlocked from the first access end and the second access end of the caliper on the wheel to be unlocked; the wheel to be unlocked is a wheel on the vehicle to be unlocked; Connecting the first connection end of the first branch of the unlocking device to the first access end, and connecting the third connection end of the second branch of the unlocking device to the second access end; The switching module in the unlocking device is operated to control the caliper to perform a release action through the unlocking current output by the power module in the unlocking device.
9. The method according to claim 8, characterized in that The switching module is a double-pole double-throw switch; The step of operating the switching module in the unlocking device to control the caliper to perform a release action through the unlocking current output by the power module in the unlocking device includes: Toggling the double-pole double-throw switch in a first direction; If the caliper does not perform a release action within a preset time period after the double-pole double-throw switch is toggled in a first direction, the double-pole double-throw switch is toggled in a second direction; the second direction is opposite to the first direction.
10. The method according to claim 8, characterized in that Before disconnecting the electronic parking control device in the vehicle to be unlocked from the first access end and the second access end of the caliper on the wheel to be unlocked, the method further includes: The connection between the onboard power supply of the vehicle to be unlocked and the electronic parking control device is disconnected.