Battery pack locking state detection circuit and vehicle

Abstract

The utility model provides a battery pack locking state detection circuit and a vehicle. The battery pack locking state detection circuit comprises a controller and a detection circuit. The controller includes a detection port. The detection circuit comprises a plurality of detection branches which are connected in parallel, the number of the detection branches corresponds to the number of the battery changing locks which are connected with the battery pack in a clamping mode, and the detection branches are correspondingly and electrically connected with the microswitches in the battery changing locks. And the controller is electrically connected with the detection circuit through the detection port and detects an electric signal of the detection circuit through the detection port, and when the electric signal shows that the plurality of microswitches corresponding to the plurality of detection branches are all in an off state, the controller determines that the battery pack and the plurality of corresponding battery replacement locks are in a locking state. According to the invention, the number of ports of the controller can be reduced, so that the number of data collected by the controller is reduced, the computing power waste of the controller is avoided, the port resources of the controller are effectively utilized, and the circuit structure is simplified.

Description

Technical Field

[0001] The present application relates to the field of battery replacement technology, and in particular to a battery pack lock state detection circuit and a vehicle. Background Art

[0002] With the gradual development of science and technology, trams have received widespread attention. Faced with the problem of insufficient mileage of trams, some trams use the method of replacing the battery pack in the vehicle to achieve rapid power replenishment. The battery pack is locked through multiple battery replacement locks, so that the battery pack and the corresponding battery replacement lock are in a locked state, and the battery pack is fixed in the vehicle. As the core component for replacing the battery pack, the battery replacement lock is greatly related to the safety of the user and the safety of the entire vehicle, and its locking state needs to be detected. At present, the detection of the battery replacement lock status requires multiple detection ports, which has the problems of insufficient port resources, large amount of collected data, and waste of computing power. Utility Model Content

[0003] The present application provides a battery pack lock status detection circuit and a vehicle to solve at least part of the above-mentioned technical problems.

[0004] The battery pack locking state detection circuit provided in the present application is applied to a vehicle, wherein the vehicle comprises at least one battery pack and a plurality of battery-changing locks for locking each of the battery packs; a micro switch is provided in each of the battery-changing locks; when the battery pack is connected to the battery-changing lock and the battery-changing lock is in a locked state, the micro switch corresponding to the battery-changing lock is in an open state; when the battery pack is detached from the battery-changing lock and the battery-changing lock is in an unlocked state, the micro switch corresponding to the battery-changing lock is in a closed state; the battery pack locking state detection circuit is used to detect the locking state of the battery pack and the corresponding plurality of battery-changing locks by detecting the on-off state of the plurality of micro switches corresponding to the plurality of battery-changing locks connected to each of the battery packs; the battery pack locking state detection circuit comprises:

[0005] a controller, including a detection port; and

[0006] The detection circuit includes multiple detection branches connected in parallel, the number of the multiple detection branches is set corresponding to the number of the multiple battery-changing locks that are connected to the battery pack, and the multiple detection branches are electrically connected to the multiple micro switches in the multiple battery-changing locks; the controller is electrically connected to the detection circuit through the detection port, and detects the electrical signal of the detection circuit through the detection port, wherein when the electrical signal indicates that the multiple micro switches corresponding to the multiple detection branches are all in a disconnected state, it is determined that the battery pack and the corresponding multiple battery-changing locks are in a locked state.

[0007] Preferably, the detection branch includes a detection resistor; the controller detects current signals of multiple detection resistors through the detection port, wherein when the current signal is detected to be zero, it indicates that all of the multiple micro switches corresponding to the multiple detection branches are in an open state.

[0008] Preferably, the resistance values ​​of the multiple detection resistors are the same.

[0009] Preferably, the battery pack locking status detection circuit includes at least one detection circuit, and the number of the detection circuits is set corresponding to the number of the battery packs; the controller includes at least one detection port, the number of the detection ports is set corresponding to the number of the detection circuits, and at least one of the detection circuits is electrically connected to at least one of the detection ports.

[0010] Preferably, the battery pack locking state detection circuit includes a first detection circuit and a second detection circuit; the controller includes a first detection port and a second detection port, the controller is electrically connected to the first detection circuit through the first detection port and detects a first electrical signal of the first detection circuit through the first detection port; the controller is electrically connected to the second detection circuit through the second detection port and detects a second electrical signal of the second detection circuit through the second detection port; wherein, when the first electrical signal indicates that the multiple microswitches corresponding to the multiple detection branches in the first detection circuit are all in a disconnected state, it is determined that the battery pack connected to the multiple battery-changing locks electrically connected to the first detection circuit is in a locked state; when the second electrical signal indicates that the multiple microswitches corresponding to the multiple detection branches of the second detection circuit are all in a disconnected state, it is determined that the battery pack connected to the multiple battery-changing locks electrically connected to the second detection circuit is in a locked state.

[0011] The present application also provides a vehicle, comprising:

[0012] at least one battery pack;

[0013] A plurality of battery-changing locks for locking each of the battery packs, each of the battery-changing locks being provided with a micro switch, and when the battery pack is connected to the battery-changing lock and the battery-changing lock is in a locked state, the micro switch corresponding to the battery-changing lock is in an open state; when the battery pack is detached from the battery-changing lock and the battery-changing lock is in an unlocked state, the micro switch corresponding to the battery-changing lock is in a closed state; and

[0014] As described above, the battery pack locking status detection circuit is used to detect the locking status of the battery pack and the corresponding multiple battery replacement locks by detecting the on and off status of the multiple micro switches corresponding to the multiple battery replacement locks connected to each battery pack.

[0015] Preferably, the number of the multiple power-changing locks corresponding to each battery pack is an even number and they are arranged in pairs, and the multiple power-changing locks are symmetrically arranged about the battery pack.

[0016] Preferably, the battery-changing lock includes:

[0017] case;

[0018] The locking assembly comprises a first locking member and a second locking member; the first locking member and the second locking member are rotatably disposed in the housing; the first locking member is provided with a receiving groove for receiving a battery pack;

[0019] A micro switch, wherein a protrusion is provided on a side of the second locking member close to the first locking member, and the protrusion is used to press or release the micro switch;

[0020] When the battery-changing lock is in an unlocked state, the first locking member and the second locking member are unlocked, and the protrusion presses the microswitch to put the microswitch in a closed state; when the battery-changing lock is in a locked state, the first locking member and the second locking member are locked to lock the battery pack in the accommodating slot, and the protrusion releases the pressure on the microswitch to put the microswitch in a disconnected state.

[0021] Preferably, the shell is provided with a slide groove, and the slide groove has an opening; when the battery-changing lock is in the unlocked state, the notch of the accommodating groove faces the opening; when the first locking member is rotated to be locked with the second locking member, the battery-changing lock is in the locked state, and the notch of the accommodating groove faces away from the opening, so that the battery pack is locked in the accommodating groove; when the second locking member is rotated to be separated from the first locking member, the locking assembly returns to the unlocked state.

[0022] Preferably, the locking assembly also includes a first elastic member, one end of the first elastic member is connected to the first locking member, and the other end is connected to the shell; when the power-changing lock is in the unlocked state, the first elastic member is in a non-tensioned state; when the power-changing lock is in the locked state, the first elastic member is used to provide an elastic force to the first locking member to rotate toward the opening direction.

[0023] Preferably, the locking assembly includes a second elastic member, one end of the second elastic member is connected to the second locking member, and the other end is connected to the shell; when the power-changing lock is in the unlocked state, the second elastic member is used to provide an elastic force to the second locking member to rotate toward the opening direction; when the power-changing lock is in the locked state, the second elastic member is in a non-tensioned state.

[0024] The battery pack lock state detection circuit and vehicle provided in the embodiment of the present application, the battery pack lock state detection circuit is provided by setting a controller and a detection circuit, the controller is provided by setting a detection port, the detection circuit is provided by setting a plurality of detection branches connected in parallel, and the plurality of detection branches are electrically connected to the plurality of micro switches provided in the plurality of battery-changing locks, the controller is electrically connected to the plurality of detection branches of the detection circuit through a detection port, and the electrical signal of the detection circuit is detected through the one detection port, that is, the controller detects the on-off state of the plurality of micro switches provided on the plurality of detection branches through a detection port to determine the lock state of the battery pack and the corresponding plurality of battery-changing locks. Such a setting reduces the number of ports of the controller, thereby reducing the number of data collected by the controller, avoiding waste of the computing power of the controller, and effectively utilizing the port resources of the controller, simplifying the circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 Shown is a three-dimensional schematic diagram of a battery replacement system according to an embodiment of the present application;

[0027] Figure 2 Shown is a three-dimensional schematic diagram of a vehicle according to an embodiment of the present application;

[0028] Figure 3 Shown Figure 2 The schematic diagram of the positions of the battery pack and the corresponding multiple battery replacement locks shown;

[0029] Figure 4 Shown Figure 3 The schematic diagram of the power change lock shown is in the unlocked state;

[0030] Figure 5 Shown Figure 4 The schematic diagram of the power change lock shown is in a locked state;

[0031] Figure 6 FIG. 1 is a schematic block diagram of a battery pack lock state detection circuit according to an embodiment of the present application;

[0032] Figure 7 Shown Figure 6 A circuit diagram of an embodiment of a battery pack lock state detection circuit shown;

[0033] Figure 8 Shown Figure 6 A circuit diagram of another embodiment of a battery pack lock state detection circuit is shown.

[0034] Reference numerals:

[0035] Battery exchange system 10, vehicle 11, transport vehicle 12, charging compartment 13, frame 14, battery pack 15, mounting portion 151, battery exchange lock 16, micro switch 161, housing 17, locking assembly 18, first locking member 19, second locking member 20, protrusion 201, slide groove 21, opening 22, accommodating groove 23, notch 25, first elastic member 26, second elastic member 27, battery pack locking state detection circuit 30, controller 31, detection circuit 32, detection port 311, detection branch 321, detection resistor 322, first detection port 312, second detection port 313, first detection circuit 33, second detection circuit 34. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0037] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0038] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "a", "an" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0039] The present application provides a battery pack locking state detection circuit and a vehicle, and the battery pack locking state detection circuit is applied to a vehicle. The vehicle includes at least one battery pack and multiple battery replacement locks for locking each battery pack. A micro switch is provided in each battery replacement lock. When the battery pack is connected to the battery replacement lock and the battery replacement lock is in a locked state, the micro switch corresponding to the battery replacement lock is in an open state. When the battery pack is detached from the battery replacement lock and the battery replacement lock is in an unlocked state, the micro switch corresponding to the battery replacement lock is in a closed state. The battery pack locking state detection circuit is used to detect the locking state of the battery pack and the corresponding multiple battery replacement locks by detecting the on-off state of the multiple micro switches corresponding to the multiple battery replacement locks connected to each battery pack. The battery pack locking state detection circuit includes a controller and a detection circuit. The controller includes a detection port. The detection circuit includes multiple detection branches connected in parallel, the number of the multiple detection branches is set corresponding to the number of the multiple battery replacement locks connected to the battery pack, and the multiple detection branches are electrically connected to the multiple micro switches in the multiple battery replacement locks. The controller is electrically connected to the detection circuit through the detection port, and detects the electrical signal of the detection circuit through the detection port. When the electrical signal indicates that multiple micro switches corresponding to multiple detection branches are all in the disconnected state, it is determined that the battery pack and the corresponding multiple battery replacement locks are in the locked state.

[0040] The battery pack lock state detection circuit and vehicle provided in the present application are applied to the vehicle. The battery pack lock state detection circuit is configured by setting a controller and a detection circuit. The controller is configured by setting a detection port. The detection circuit is configured by setting multiple detection branches connected in parallel. The multiple detection branches are electrically connected to the multiple micro switches provided in the multiple battery-changing locks. The controller is electrically connected to the multiple detection branches of the detection circuit through a detection port, and detects the electrical signal of the detection circuit through the one detection port. That is, the controller detects the on-off state of the multiple micro switches provided on the multiple detection branches through a detection port to determine the locking state of the battery pack and the corresponding multiple battery-changing locks. This configuration reduces the number of ports of the controller, thereby reducing the amount of data collected by the controller, avoiding waste of the computing power of the controller, and effectively utilizing the port resources of the controller to simplify the circuit structure.

[0041] Figure 1 Shown is a three-dimensional schematic diagram of a battery replacement system 10 according to an embodiment of the present application. Figure 2FIG. 1 is a perspective view of a vehicle 11 according to an embodiment of the present application. Figure 1 and Figure 2 As shown, the battery exchange system 10 includes a vehicle 11, a transport vehicle 12 and a charging compartment 13. In some embodiments, the vehicle 11 may include a micro truck or a light truck. In some embodiments, the vehicle 11 may include a bus, a truck, a sedan, etc. Among them, trucks may include vans, trucks, etc., which are not limited in this application. The vehicle 11 includes a frame 14, at least one battery pack 15, and a plurality of battery exchange locks 16 for locking each battery pack. A plurality of battery exchange locks 16 are provided on the frame 14, and the battery pack 15 is detachably mounted on the frame 14 through the battery exchange locks 16. The battery pack 15 of the vehicle 11 can be replaced when the battery pack 15 of the vehicle 11 is exhausted.

[0042] There is at least one battery pack 15 in each vehicle 11. In some small household vehicles, there is generally one battery pack 15. In some large commercial vehicles, there may be two or more battery packs 15, which is not limited in this application.

[0043] Figure 3 Shown Figure 2 The schematic diagram of the positions of the battery pack 15 and the corresponding multiple battery replacement locks 16 is shown. Figure 3 As shown, there are multiple battery-changing locks 16 for locking each battery pack 15. Specifically, the number of battery-changing locks 16 for locking the battery pack 15 can be set according to the size of the battery pack 15. The number of multiple battery-changing locks 16 corresponding to each battery pack 15 is an even number and is arranged in pairs, and the multiple battery-changing locks 16 are symmetrically arranged about the battery pack 15. Specifically, a plurality of mounting portions 151 are provided on the battery pack 15, and the battery pack 15 is clamped with the multiple battery-changing locks 16 through the multiple mounting portions 151, so that the battery pack 15 is clamped in the multiple battery-changing locks 16. In general, four mounting portions 151 are generally provided on the battery pack 15 on a small household vehicle, and the battery pack 15 is clamped by four battery-changing locks 16. The battery pack 15 on a large commercial vehicle is generally provided with six mounting portions 151, and the battery pack 15 is clamped by six battery-changing locks 16. On some other vehicles, the number of battery-changing locks 16 for clamping the battery pack 15 can be even greater, and this application does not limit this.

[0044] In one embodiment, at least two battery-changing locks 16 may be provided on one side of the battery pack 15, and at least two battery-changing locks 16 may be provided on the other side of the battery pack 15. The symmetrical arrangement of multiple battery-changing locks 16 about the battery pack 15 can improve the firmness of the battery pack 15, so that the installation of the battery pack 15 is more stable.

[0045] Figure 4 Shown Figure 3 The schematic diagram shown is when the power-changing lock 16 is in the unlocked state. Figure 5 Shown Figure 3 The schematic diagram of the battery lock 16 shown is in a locked state. Figures 4 to 5 As shown, the battery lock 16 includes a housing 17, a locking assembly 18 and a micro switch 161. The locking assembly 18 includes a first locking member 19 and a second locking member 20. A protrusion 201 is provided on the side of the second locking member 20 close to the first locking member 19, and the protrusion 201 is used to press or release the micro switch 161, so that the micro switch 161 is in a closed state or the micro switch 161 is in an open state. The first locking member 19 and the second locking member 20 are rotatably arranged in the housing 17. Among them, the first locking member 19 can rotate relative to the housing 17, and the second locking member 20 can rotate relative to the housing 17. And the first locking member 19 and the second locking member 20 can be arranged in the housing 17. The first locking member 19 is provided with a receiving groove 23 for accommodating the battery pack 15. The mounting portion 151 of the battery pack 15 can be cylindrical, and the mounting portion 151 of the battery pack 15 can be accommodated in the receiving groove 23.

[0046] The battery lock 16 includes an unlocked state and a locked state. The unlocked state can be referred to Figure 4 As shown, the locked state can be referred to Figure 5 As shown. When the battery-changing lock 16 is in the unlocked state, the first locking member 19 is separated from the second locking member 20. In this way, the battery pack 15 can be removed when the locking assembly 18 is in the unlocked state. When the battery pack 15 is detached from the battery-changing lock 16 and the battery-changing lock 16 is in the unlocked state, the protrusion 201 presses the micro switch 161, so that the micro switch 161 corresponding to the battery-changing lock 16 is in the closed state.

[0047] When the battery-changing lock 16 is in the locked state, the first locking member 19 and the second locking member 20 are locked, so that the battery pack 15 is locked in the receiving groove 23. In this way, the battery pack 15 can be installed in the locking assembly 18 when the locking assembly 18 is in the locked state. When the battery pack 15 is clamped in the battery-changing lock 16 and the battery-changing lock 16 is in the locked state, the protrusion 201 releases the pressure on the micro switch 161, so that the micro switch 161 corresponding to the battery-changing lock 16 is in the disconnected state.

[0048] In one embodiment, the housing 17 is provided with a slide groove 21. The slide groove 21 has an opening 22. The opening 22 may face downward. The first locking member 19 may be located on one side of the opening 22, and the second locking member 20 may be located on the other side of the opening 22. The mounting portion 151 of the battery pack 15 may be slidably located in the slide groove 21. The mounting portion 151 may slide along the extension direction of the slide groove 21. When the locking assembly 18 is in an unlocked state, the notch 25 of the receiving groove 23 faces the opening 22, and the first locking member 19 and the second locking member 20 are separated. At this time, the first locking member 19 may rotate. When the first locking member 19 rotates to lock with the second locking member 20, the locking assembly 18 is in a locked state, and the notch 25 of the receiving groove 23 faces away from the opening 22, so that the battery pack 15 is locked in the receiving groove 23. Among them, the orientation direction of the notch 25 of the accommodating groove 23 can be opposite to the orientation direction of the opening 22, the orientation direction of the notch 25 of the accommodating groove 23 can also be perpendicular to the orientation direction of the opening 22, and the orientation direction of the notch 25 of the accommodating groove 23 can also be at an obtuse angle to the orientation direction of the opening 22.

[0049] The battery pack 15 can be pushed so that the mounting portion 151 of the battery pack 15 can extend from the opening 22 into the slide groove 21 and enter the receiving groove 23 from the notch 25. While continuing to push the battery pack 15, the mounting portion 151 of the battery pack 15 can push the first locking member 19 to rotate the first locking member 19 until the first locking member 19 rotates to lock with the second locking member 20, and the notch 25 of the receiving groove 23 faces away from the opening 22, so that the mounting portion 151 of the battery pack 15 can be limited in the receiving groove 23, thereby locking the battery pack 15 to the battery change lock 16.

[0050] When the second locking member 20 is rotated to be separated from the first locking member 19, the locking assembly 18 returns to the unlocked state. The second locking member 20 can be rotated to separate from the first locking member 19. When the second locking member 20 is rotated to be separated from the first locking member 19, the locking assembly 18 returns to the unlocked state, and the notch 25 of the receiving groove 23 faces the opening 22, so that the mounting portion 151 of the battery pack 15 can be separated from the receiving groove 23 and the slide groove 21, and the battery pack 15 can be removed.

[0051] In one embodiment, the locking assembly 18 further includes a first elastic member 26. One end of the first elastic member 26 is connected to the first locking member 19, and the other end is connected to the housing 17. When the locking assembly 18 is in the unlocked state, the first elastic member 26 is in a non-tensioned state. When the locking assembly 18 is in the locked state, the first elastic member is used to provide an elastic force to the first locking member 19 to rotate toward the opening 22. In the process of switching the locking assembly 18 from the locked state to the unlocked state, the second locking member 20 is rotated so that the second locking member 20 is separated from the first locking member 19, and the first elastic member 26 drives the first locking member 19 back to the unlocked state. The notch 25 of the receiving groove 23 faces the opening 22, and the mounting portion 151 of the battery pack 15 can be separated from the receiving groove 23 and the slide groove 21. In this way, the second locking member 20 can be rotated to realize the disassembly of the mounting portion 151 of the battery pack 15, and the disassembly of the battery pack 15 is simple.

[0052] In one embodiment, the locking assembly 18 includes a second elastic member 27. One end of the second elastic member 27 is connected to the second locking member 20, and the other end is connected to the housing 17. When the locking assembly 18 is in an unlocked state, the second elastic member 27 is used to provide an elastic force for the second locking member 20 to rotate toward the opening 22. When the locking assembly 18 is in a locked state, the second elastic member 27 is in a non-tensioned state. In the process of switching from the unlocked state to the locked state, the first locking member 19 is rotated, and the first locking member 19 can be pushed against the second locking member 20, so that the second locking member 20 rotates and the second elastic member 27 is in a compressed state. Until the second elastic member 27 can drive the second locking member 20 to rotate in the opposite direction, that is, rotate in the direction of the opening 22, the second locking member 20 rotates in the opposite direction, and the first locking member 19 and the second locking member 20 are locked. The notch 25 of the receiving groove 23 is limited to a position facing away from the opening 22, so that the mounting portion 151 of the battery pack 15 can be limited in the receiving groove 23, so that the battery pack 15 can be locked to the battery replacement lock 16. In this way, the installation of the battery pack 15 is simple.

[0053] The vehicle 11 also includes a battery pack locking state detection circuit 30, which is used to detect the locking state of the battery pack 15 and the corresponding multiple battery replacement locks 16 by detecting the on-off state of multiple micro switches 161 corresponding to the multiple battery replacement locks 16 connected to each battery pack 15. In this way, the battery pack locking state detection circuit 30 detects the locking state of the battery pack 15 by detecting the on-off state of multiple micro switches 161. The detection method is simple and convenient as a basis for powering on the vehicle.

[0054] Figure 6 FIG. 2 is a schematic block diagram of a battery pack lock state detection circuit 30 according to an embodiment of the present application. Figure 6As shown, the battery pack lock state detection circuit 30 includes a controller 31 and a detection circuit 32. The controller 31 includes a detection port 311. The detection circuit 32 includes a plurality of detection branches 321 connected in parallel, and the number of the plurality of detection branches 321 is set corresponding to the number of the plurality of power-changing locks 16 that are connected to the battery pack 15, and the plurality of detection branches 321 are electrically connected correspondingly to the plurality of micro switches 161 in the plurality of power-changing locks 16. In this embodiment, the number of the detection branches 321 is 4, that is, the number of the power-changing locks 16 used to connect the battery pack 15 is also 4, because a micro switch 161 is provided in each power-changing lock 16, and 4 micro switches 161 are provided in 4 power-changing locks. The number of multiple detection branches 321 is set corresponding to the number of multiple battery-changing locks 16 connected to the battery pack 15, and the multiple detection branches 321 are electrically connected to the multiple micro switches 161 in the multiple battery-changing locks 16, so as to facilitate establishing the corresponding relationship between the detection circuit 32 and all the battery-changing locks connected to the battery pack 15.

[0055] The controller 31 is electrically connected to the detection circuit 32 through the detection port 311, and detects the electrical signal of the detection circuit 32 through the detection port 311, wherein when the electrical signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 are all in the disconnected state, it is determined that the battery pack 15 and the corresponding multiple power-changing locks 16 are in the locked state. Determining whether the battery pack 15 and the corresponding multiple power-changing locks 16 are in the locked state through the electrical signal of the detection circuit 32 fully utilizes the principle that the total electrical signal of the parallel circuit is different when all the branch circuits in the parallel circuit are disconnected and when there is at least one branch circuit path. That is, when all the multiple micro switches 161 electrically connected to the multiple detection branches 321 are in the disconnected state, the electrical signal detected by the controller 31 through the detection port 311 is different from the electrical signal detected by the controller 31 through the detection port 311 when at least one of the multiple micro switches 161 electrically connected to the multiple detection branches 321 is not in the disconnected state.

[0056] The battery pack locking state detection circuit 30 is provided with a controller 31 and a detection circuit 32. The controller 31 is provided with a detection port 311. The detection circuit 32 is provided with a plurality of detection branches 321 connected in parallel. The plurality of detection branches 321 are electrically connected to the plurality of micro switches 161 provided in the plurality of battery-changing locks 16. The controller 31 is electrically connected to the plurality of detection branches 321 of the detection circuit 32 through a detection port 311, and detects the electrical signal of the detection circuit 32 through the detection port 311, that is, the controller 31 detects the on-off state of the plurality of micro switches 161 provided on the plurality of detection branches 321 through a detection port 311 to determine the locking state of the battery pack 15 and the corresponding plurality of battery-changing locks 16. Such a setting reduces the number of ports of the controller 31, thereby reducing the number of data collected by the controller 31, avoiding the waste of the computing power of the controller 31, and effectively utilizing the port resources of the controller 31, simplifying the circuit structure.

[0057] During the process of replacing the battery pack 15, when the battery pack 15 is inserted into the multiple battery-changing locks 16 corresponding to the battery pack 15, the battery pack locking state detection circuit 30 determines the locking state of the battery pack 15 and the corresponding multiple battery-changing locks 16. After determining that the battery pack 15 and the corresponding multiple battery-changing locks 16 are in the locked state, the battery pack 15 can be powered on to avoid personal injury and damage to the vehicle 11 caused by powering on when the battery pack 15 is not locked in place.

[0058] In some embodiments, when the vehicle 11 is provided with a battery pack 15, during the operation of the vehicle 11, the battery pack lock state detection circuit 30 can determine the lock state of the battery pack 15 and the corresponding multiple battery-changing locks 16. If the battery pack 15 and the corresponding multiple battery-changing locks 16 are in an unlocked state, that is, at least one of the multiple battery-changing locks 16 corresponding to the battery pack 15 is not in a locked state, the controller 31 will feed back the abnormal detection result to the instrument to remind the vehicle user to stop using it, and re-lock the battery pack 15 to ensure safe use. Compared with the related art, the battery pack lock state detection circuit 30 provided in the embodiment of the present application can reduce the number of ports of the controller 31, thereby reducing the amount of data collected by the controller 31, avoiding the waste of computing power of the controller 31, and effectively utilizing the port resources of the controller 31 to simplify the circuit structure.

[0059] Figure 7 Shown Figure 6 The circuit diagram of one embodiment of the battery pack lock state detection circuit 30 is shown. Figure 6 and Figure 7As shown, the controller 31 also includes a ground port GND. The controller 31 is electrically connected to a plurality of detection branches 321 of the detection circuit 32 through the detection port 311, and forms a detection loop through the ground port GND, so as to facilitate the collection of data of the detection circuit 32. Figure 7 In the illustrated embodiment, the detection branch 321 includes a detection resistor 322. The controller 31 detects the current signal of the multiple detection resistors 322 through the detection port 311, wherein when the current signal is detected to be zero, it indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 are all in the disconnected state. It can be understood that the controller 31 detects the current signal of the detection circuit 32 through the detection port 311, and then indirectly obtains the sum of the current signals of the multiple detection resistors 322. Because the multiple detection branches 321 are connected in parallel, when the current signal of the detection circuit 32 is detected to be zero, it means that the current of each detection branch 321 of the detection circuit 32 is zero, that is, each detection branch 321 of the detection circuit 32 is disconnected. That is, the current signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 are all in the disconnected state, and it is determined that the battery pack 15 and the corresponding multiple power-changing locks 16 are in the locked state, and the battery pack 15 is installed in place. Because multiple detection branches 321 are connected in parallel, when it is detected that the current signal of the detection circuit 32 is not zero, it means that the current of at least one detection branch 321 among the multiple detection branches 321 of the detection circuit 32 is not zero, that is, at least one detection branch 321 in the detection circuit 32 is in the on state. That is, the current signal indicates that the micro switch 161 corresponding to at least one detection branch 321 among the multiple detection branches 321 is in the closed state, and it is determined that at least one of the multiple power-changing locks 16 corresponding to the battery pack 15 is in the unlocked state, and the battery pack 15 is not installed in place. In this way, by setting the detection resistor 322, it is possible to determine whether the multiple detection branches 321 of the detection circuit 32 are all in the disconnected state by detecting whether the current signal of the detection circuit 32 is zero, and then determine the locking state of the battery pack 15 and the multiple power-changing locks 16 corresponding to it. The principle that the voltages of the detection branches 321 in the detection circuit 32 are the same, the current of the detection branch 321 in the disconnected state is zero, and the current of the detection circuit 32 is the sum of the currents of all the detection branches 321 is fully utilized, so that the detection result is reliable and the detection means is convenient.

[0060] In this embodiment, the resistance values ​​of multiple detection resistors 322 are the same. Such a setting makes it easy to make the current in the turned-on detection branch 321 the same, which is convenient for detection, and can avoid overcurrent in some detection branches 321. It can also avoid that when the micro switches 161 corresponding to all detection branches 321 in the detection circuit 32 are in a closed state, it will not cause the current value of the detection branch 321 or the detection circuit 32 to be too large, which is beneficial to protect the detection resistor 322 and the detection port 311 of the controller 31. In this embodiment, by setting the resistance values ​​of multiple detection resistors 322 to be the same, it is also convenient to determine the number of power-changing locks 16 that are not in a locked state among the multiple power-changing locks 16 corresponding to the battery pack 15 through the electrical signal collected by the controller 31. It can be understood that when the resistance values ​​of the detection resistors 322 connected in series in each detection branch 321 are the same, the number of detection branches 321 turned on in multiple detection branches 321 is proportional to the current of the detection circuit 32. That is, the more the number of the detection branches 321 that are turned on among the multiple detection branches 321 is, the greater the current value of the detection circuit 32 is, and the number of the detection branches 321 that are turned on can be determined based on the current value of the detection circuit 32 .

[0061] In some embodiments, the vehicle 11 includes multiple battery packs 15, and the battery pack lock state detection circuit 30 needs to detect the lock state of multiple battery packs 15 and multiple battery replacement locks 16 corresponding to the battery packs 15. The battery pack lock state detection circuit 30 includes at least one detection circuit 32, and the number of detection circuits 32 is set corresponding to the number of battery packs 15. The controller 31 includes at least one detection port 311, and the number of detection ports 311 is set corresponding to the number of detection circuits 32, and at least one detection circuit 32 is electrically connected to at least one detection port 311. For multiple battery replacement locks 16 of the same battery pack 15, the multiple battery replacement locks 16 corresponding to the same battery pack 15 share the same detection port 311. For a vehicle 11 with multiple battery packs 15, the number of detection ports set by the controller 31 is the same as the number of battery packs 15. In this way, the number of detection ports 311 and the number of detection circuits 32 can be flexibly configured according to the number of battery packs 15 in the vehicle 11, which is highly flexible. And by making multiple battery-changing locks 16 corresponding to the same battery pack 15 share the same detection port 311, multiple battery-changing locks 16 corresponding to different battery packs 15 do not share the same detection port, and the battery pack 15 is used as a detection unit to detect the locking state of each battery pack 15 and the multiple battery-changing locks 16 corresponding to it, so as to avoid interference between multiple battery-changing locks 16 of different battery packs 15. Compared with the related art that a single battery pack 15 requires multiple detection ports to detect the states of multiple battery-changing locks 16, such a setting can reduce the number of ports of the controller 31, thereby reducing the amount of data collected by the controller 31, effectively utilizing the computing power resources and port resources of the controller 31, simplifying the circuit structure and reducing costs.

[0062] During the process of replacing the battery pack 15, when multiple battery packs 15 are plugged into the multiple battery-changing locks 16 corresponding to the battery packs 15, the battery pack locking state detection circuit 30 determines the locking state of the multiple battery packs 15 and the corresponding multiple battery-changing locks 16. Specifically, it can be determined whether all the multiple battery packs 15 are in a locked state, or the battery packs 15 in a locked state and the battery packs 15 in an unlocked state. When there is an unlocked battery pack 15 in the vehicle 11, the battery pack can be re-plugged. Only when all the battery packs 15 in the vehicle 11 are in a locked state with the multiple battery-changing locks 16 corresponding to them, can the vehicle 11 be powered on, so as to avoid personal injury and damage to the vehicle 11 caused by powering on when a battery pack 15 is not locked in place. During the operation of the vehicle 11, the battery pack locking status detection circuit 30 can also determine the locking status of multiple battery packs 15 and the corresponding multiple battery replacement locks 16. When a battery pack 15 in an unlocked state is detected, the controller 31 will feed back the abnormal detection result to the instrument to remind the vehicle user to stop using it, and re-lock the abnormal battery pack 15 to ensure safe use.

[0063] Figure 8 Shown Figure 6 FIG. 2 is a circuit diagram of another embodiment of a battery pack lock state detection circuit 30. Figure 8 In the illustrated embodiment, the vehicle 11 includes two battery packs 15, namely, a first battery pack and a second battery pack, and the battery pack lock state detection circuit 30 includes a first detection circuit 33 and a second detection circuit 34. The controller 31 includes a first detection port 312 and a second detection port 313. The first detection circuit 33 is used to detect the lock state of the first battery pack, and the second detection circuit 34 is used to detect the lock state of the second battery pack. The controller 31 is electrically connected to the first detection circuit 33 through the first detection port 312 and detects the first electrical signal of the first detection circuit 33 through the first detection port 312. The multiple first detection branches 321 of the first detection circuit 33 share the same first detection port 312 of the controller 31. The controller 31 detects the first electrical signal through the same first detection port 312 and determines the lock state of the first battery pack through the first electrical signal. The controller 31 is electrically connected to the second detection circuit 34 through the second detection port 313 and detects the second electrical signal of the second detection circuit 34 through the second detection port 313. The plurality of first detection branches 321 of the second detection circuit 34 share the same second detection port 313 of the controller 31. The controller 31 detects the second electrical signal through the same second detection port 313, and determines the locking state of the second battery pack through the second electrical signal.

[0064] When the current signal in the first electrical signal is zero, the first electrical signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 in the first detection circuit 33 are all in the disconnected state, and it is determined that the battery pack 15 connected to the multiple power-changing locks 16 where the multiple micro switches 161 electrically connected to the first detection circuit 33 are located is in a locked state. That is, the first battery pack and the corresponding multiple power-changing locks 16 are in a locked state, and the first battery pack is installed in place. When the current signal in the first electrical signal is not zero, the first electrical signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 in the first detection circuit 33 are not all in the disconnected state, and it is determined that at least one of the multiple power-changing locks 16 where the multiple micro switches 161 electrically connected to the first detection circuit 33 are located is not in a locked state, that is, the first battery pack is not in a locked state, and the first battery pack is not installed in place.

[0065] The judgment of the locking state of the second battery pack is the same as the judgment of the locking state of the first battery pack. Specifically, when the current signal in the second electrical signal is zero, the second electrical signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 of the second detection circuit 34 are all in the disconnected state, and it is determined that the battery pack 15 connected to the multiple battery-changing locks where the multiple micro switches 161 electrically connected to the second detection circuit 34 are located is in a locked state. That is, the second battery pack and the corresponding multiple battery-changing locks 16 are in a locked state, and the second battery pack is installed in place. When the current signal in the second electrical signal is not zero, the second electrical signal indicates that the multiple micro switches 161 corresponding to the multiple detection branches 321 of the second detection circuit 34 are not all in the disconnected state, and it is determined that at least one of the multiple battery-changing locks 16 where the multiple micro switches 161 electrically connected to the second detection circuit 34 are located is not in a locked state, that is, the first battery pack is not in a locked state, and the first battery pack is not installed in place.

[0066] It is understandable that the number of battery packs 15 that can be included in the vehicle 11 can be multiple, so the number of control ports and the number of detection circuits in the controller can also be multiple, and this application does not limit this. Figure 8 The embodiments shown are merely illustrative examples and do not constitute limitations on the present application.

[0067] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0068] It should be understood that the present application is not limited to the precise structures that have been 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. A battery pack lock state detection circuit, applied to a vehicle, characterized in that: The vehicle includes at least one battery pack and a plurality of battery change locks for locking each of the battery packs; A micro switch is provided in each of the battery-changing locks; when the battery pack is connected to the battery-changing lock and the battery-changing lock is in a locked state, the micro switch corresponding to the battery-changing lock is in an open state; when the battery pack is detached from the battery-changing lock and the battery-changing lock is in an unlocked state, the micro switch corresponding to the battery-changing lock is in a closed state; the battery pack locking state detection circuit is used to detect the locking state of the battery pack and the corresponding multiple battery-changing locks by detecting the on-off states of the multiple micro switches corresponding to the multiple battery-changing locks connected to each of the battery packs; The battery pack lock state detection circuit comprises: a controller, including a detection port; and The detection circuit includes multiple detection branches connected in parallel, the number of the multiple detection branches is set corresponding to the number of the multiple battery-changing locks that are connected to the battery pack, and the multiple detection branches are electrically connected to the multiple micro switches in the multiple battery-changing locks; the controller is electrically connected to the detection circuit through the detection port, and detects the electrical signal of the detection circuit through the detection port, wherein when the electrical signal indicates that the multiple micro switches corresponding to the multiple detection branches are all in a disconnected state, it is determined that the battery pack and the corresponding multiple battery-changing locks are in a locked state.

2. The battery pack lock state detection circuit according to claim 1, characterized in that: The detection branch includes a detection resistor; the controller detects current signals of multiple detection resistors through the detection port, wherein when the current signal is detected to be zero, it indicates that all of the multiple micro switches corresponding to the multiple detection branches are in an open state.

3. The battery pack lock state detection circuit according to claim 2, characterized in that: The resistance values ​​of the plurality of detection resistors are the same.

4. The battery pack lock state detection circuit according to claim 1, characterized in that: The battery pack lock status detection circuit includes at least one detection circuit, and the number of the detection circuits is set corresponding to the number of the battery packs; the controller includes at least one detection port, the number of the detection ports is set corresponding to the number of the detection circuits, and at least one of the detection circuits is electrically connected to at least one of the detection ports.

5. The battery pack lock state detection circuit according to claim 4, characterized in that: The battery pack locking state detection circuit includes a first detection circuit and a second detection circuit; the controller includes a first detection port and a second detection port, the controller is electrically connected to the first detection circuit through the first detection port and detects a first electrical signal of the first detection circuit through the first detection port; the controller is electrically connected to the second detection circuit through the second detection port and detects a second electrical signal of the second detection circuit through the second detection port; wherein, when the first electrical signal indicates that the multiple microswitches corresponding to the multiple detection branches in the first detection circuit are all in a disconnected state, it is determined that the battery pack connected to the multiple battery-changing locks electrically connected to the first detection circuit is in a locked state; when the second electrical signal indicates that the multiple microswitches corresponding to the multiple detection branches in the second detection circuit are all in a disconnected state, it is determined that the battery pack connected to the multiple battery-changing locks electrically connected to the second detection circuit is in a locked state.

6. A vehicle, characterized in that: include: at least one battery pack; A plurality of battery-changing locks for locking each of the battery packs, each of the battery-changing locks being provided with a micro switch, when the battery pack is connected to the battery-changing lock and the battery-changing lock is in a locked state, the micro switch corresponding to the battery-changing lock is in an open state; when the battery pack is detached from the battery-changing lock and the battery-changing lock is in an unlocked state, the micro switch corresponding to the battery-changing lock is in a closed state; and The battery pack locking status detection circuit as described in any one of claims 1 to 5, wherein the battery pack locking status detection circuit is used to detect the locking status of the battery pack and the corresponding multiple battery changing locks by detecting the on and off status of multiple micro switches corresponding to the multiple battery changing locks connected to each battery pack.

7. The vehicle according to claim 6, characterized in that The number of the multiple power-changing locks corresponding to each battery pack is an even number and they are arranged in pairs, and the multiple power-changing locks are symmetrically arranged about the battery pack.

8. The vehicle according to claim 6, characterized in that The power-changing lock comprises: case; The locking assembly comprises a first locking member and a second locking member; the first locking member and the second locking member are rotatably disposed in the housing; the first locking member is provided with a receiving groove for receiving a battery pack; A micro switch, wherein a protrusion is provided on a side of the second locking member close to the first locking member, and the protrusion is used to press or release the micro switch; When the battery-changing lock is in an unlocked state, the first locking member and the second locking member are unlocked, and the protrusion presses the microswitch to put the microswitch in a closed state; when the battery-changing lock is in a locked state, the first locking member and the second locking member are locked to lock the battery pack in the accommodating slot, and the protrusion releases the pressure on the microswitch to put the microswitch in a disconnected state.

9. The vehicle according to claim 8, characterized in that The housing is provided with a slide groove, and the slide groove has an opening; when the battery-changing lock is in the unlocked state, the notch of the accommodating groove faces the opening; when the first locking member is rotated to be locked with the second locking member, the battery-changing lock is in the locked state, and the notch of the accommodating groove faces away from the opening, so that the battery pack is locked in the accommodating groove; When the second locking member is rotated to be separated from the first locking member, the locking assembly returns to the unlocked state.

10. The vehicle according to claim 9, characterized in that The locking assembly further includes a first elastic member, one end of the first elastic member is connected to the first locking member, and the other end is connected to the housing; when the battery-changing lock is in the unlocked state, the first elastic member is in a non-tensioned state; When the battery-changing lock is in the locked state, the first elastic member is used to provide an elastic force for the first locking member to rotate toward the opening direction; and / or The locking assembly includes a second elastic member, one end of the second elastic member is connected to the second locking member, and the other end is connected to the housing; when the battery-changing lock is in the unlocked state, the second elastic member is used to provide an elastic force for the second locking member to rotate toward the opening direction; When the power-changing lock is in the locked state, the second elastic member is in a non-tensioned state.

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