Quick-change battery device for forklift

Abstract

The utility model discloses a quick-change battery device for a forklift, which comprises a battery arranged in a battery bin, and roller groups are symmetrically and detachably mounted at two ends of the bottom end surface of a battery shell in the moving direction; the roller group comprises a moving part and a supporting part, the supporting part comprises a connecting cylinder with an opening in the top end, a universal wheel is fixedly arranged at the bottom end of the connecting cylinder, and a permanent magnet is fixedly arranged at the bottom of an inner cavity of the connecting cylinder; the moving part comprises a supporting plate, a conductive device and a supporting seat; the supporting seat is movably embedded in the connecting cylinder; an electromagnet is embedded in the bottom of the supporting seat and is electrically connected with the conductive device; when the electromagnet is electrified and generates repulsive force with the permanent magnet, the moving part is driven to move upwards along the connecting cylinder to jack up the battery to be separated from the battery bin. According to the utility model, the roller group generates repulsive force with the permanent magnet after being electrified through the electromagnet, the moving part is driven to move upwards to jack up the battery to break away from the limitation of the battery compartment, and the roller group can be replaced quickly and can be used repeatedly.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, and in particular to a forklift quick-change battery device which can be replaced conveniently and quickly. Background Art

[0002] As the technology of the three-electric system of electric forklifts becomes more mature and the cost drops, the market share of medium and large tonnage (4-10t) counterbalanced electric forklifts has been further improved. Compared with internal combustion forklifts, the price and performance of electric forklifts are comparable to them, and the endurance has become a key factor in whether users choose electric forklifts. Electric forklifts are mainly powered by batteries, which drive the traction motor and hydraulic pump motor to achieve driving and loading and unloading operations.

[0003] At present, battery energy storage technology has not made a breakthrough. During the operation of electric forklifts, the power in the battery will continue to be consumed, and a single battery life cannot meet the needs of heavy working conditions. Therefore, the battery needs to be charged, but due to the long charging time, in order to improve work efficiency, the main method currently used is to replace the battery to ensure the continuous operation of the forklift.

[0004] The common battery replacement methods are:

[0005] First, lift the used battery vertically with the help of a lifting device, remove the battery from the top of the forklift frame, and place it on a pre-prepared pallet or other special tool, then transfer the lifting device to the spare battery and lift it into the frame;

[0006] The second is to design the forklift frame to be open at the bottom and one side. When replacing the battery, you need to use another forklift or special tools to remove the used battery, and then move the spare battery into the forklift frame;

[0007] However, when replacing the battery of a forklift, it is usually necessary to use external tools to complete the battery replacement, such as lifting equipment, another forklift and other auxiliary tools, which is costly to use; and a large working space is required when replacing the battery. When the working space is insufficient, it will bring great inconvenience to the operation, and the operation time is long, the operation method is complicated, and the efficiency of battery replacement is low. In addition, the battery is prone to tilting and falling during the operation, which poses a great safety hazard. Utility Model Content

[0008] The utility model aims to provide a forklift quick-change battery device which can be replaced conveniently and quickly, thereby solving the problem that the existing battery replacement process of electric forklifts is complicated and inefficient.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] A forklift quick-change battery device comprises a battery arranged inside a battery compartment, wherein the battery comprises a battery housing, and roller groups are symmetrically and detachably mounted on the bottom end surface of the battery housing at both ends in a moving direction;

[0011] The roller group includes a moving part and a supporting part, the supporting part includes a connecting tube with an opening at the top, a universal wheel is fixedly provided at the bottom end of the connecting tube, and a permanent magnet is fixedly provided at the bottom of the inner cavity of the connecting tube; the moving part includes a supporting plate connected to the battery shell, a conductive device is fixedly provided on the top surface of the supporting plate, and a supporting seat is fixedly provided at the bottom end of the supporting plate; the supporting seat is movably embedded in the connecting tube; an electromagnet is embedded in the bottom of the supporting seat, and the electromagnet is electrically connected to the conductive device; when the electromagnet is energized, a repulsive force is generated with the permanent magnet, driving the moving part to move upward along the connecting tube to lift the battery out of the battery compartment.

[0012] In a further embodiment, the conductive device comprises an insulating plate fixed on the top surface of the support plate, and a copper bar and two copper sheets arranged in the middle of the copper bar are symmetrically arranged on the insulating plate, and the two copper sheets are respectively connected to the positive and negative poles of the electromagnet.

[0013] In a further solution, a copper sleeve is provided on the inner wall of the connecting tube; and a notch is provided on the bottom side of one end of the supporting plate for clamping with the battery housing.

[0014] In a further solution, an adjustable DC / DC converter is installed on the outer wall of the battery housing, and the power supply end of the adjustable DC / DC converter is electrically connected to the battery; the bottom plate of the battery housing is provided with a groove for mounting the roller group, and the groove is provided with a ball head contact; the output end of the adjustable DC / DC converter is electrically connected to the conductive device through the ball head contact.

[0015] Preferably, the roller groups and the grooves are in one-to-one correspondence, and the number of the roller groups is 2N, where N≥2.

[0016] In a further solution, a micro switch and an indicator light are installed on the battery housing, and the micro switch and the indicator light are connected in series and then in parallel to the adjustable DC / DC converter.

[0017] In a further solution, a first support block and a second support block are respectively fixed on the bottom plate of the battery casing on both sides of the groove, and the distance between the first support block and the second support block is smaller than the width of the groove; a convex strip is fixed on one side of the first support block close to the center of the groove for clamping with the support plate.

[0018] In a further solution, a hook plate and a pin plate are fixedly provided on the outer sides of the first bracket block and the second bracket block on the bottom end surface of the battery housing, and a buckle plate is rotatably connected to the pin plate. The movable end of the buckle plate is connected and fixed to the hook plate to fix the roller assembly.

[0019] In a further solution, brackets are fixedly provided on the outer walls of both sides of the battery housing, and brackets are fixedly provided on the inner walls of the wall panels of the battery compartment, and the brackets support the brackets to limit the vertical position of the battery; a limiting plate is fixedly provided on the bottom plate of the battery compartment to limit the horizontal position of the battery.

[0020] In a further solution, the bracket and the support are both adapted concave circular structures, a rubber pad is fixedly provided on the upper end surface of the bracket, and a rib plate fixedly connected to the battery housing is installed below.

[0021] According to a further solution, the battery compartment includes a box structure composed of wall panels, movable panels, a bottom plate and a crossbeam plate, wherein the wall panels are front and rear wall panels arranged opposite to each other, and the movable panels are two movable panels arranged opposite to each other; the bottom plate includes a front bottom plate and a rear bottom plate respectively connected to the wall panels, and a guard plate is movably connected between the front and rear bottom plates; the limit plates are installed on the front and rear bottom plates.

[0022] In a further solution, lock buckles are respectively installed at the two ends of the guard plate, and buckle plates compatible with the lock buckles are respectively installed at the ends of the front and rear bottom plates.

[0023] The utility model realizes the movement of the battery and the separation from the battery compartment through the roller group. When other auxiliary equipment such as forklifts cannot be used, the battery can be quickly replaced by installing the roller group carried by the vehicle, thereby ensuring the continuous operation capability of the electric forklift.

[0024] In the utility model, the roller group generates a repulsive force with the permanent magnet after the electromagnet is energized, driving the moving part to move upward and lift the battery out of the restriction of the battery compartment. Then the battery is moved out of the battery compartment and transported to a designated place for charging.

[0025] The roller assembly of the utility model is convenient and quick to disassemble and assemble, and is connected by matching the notch on the support plate with the convex strip on the first support block at the bottom of the battery housing, and then fixed by the lap plate. In addition, the roller assembly of the utility model can be reused and carried with the vehicle.

[0026] The utility model is provided with a micro switch to detect whether the battery is installed in place, that is, when the battery is slowly fed into the battery compartment, the positioning frame in the battery compartment touches the micro switch to close it, and the circuit is connected to make the indicator light work, that is, the indicator light is on, indicating that the battery is installed in place.

[0027] The arrangement of the ball head contacts in the utility model not only ensures the connectivity of the circuit, but also ensures that the spacing between the ball head contacts at the two output ends of the adjustable DC / DC converter is maximized (diagonally arranged), thereby minimizing the probability of short circuit failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1This is a schematic diagram of the first state structure of the utility model.

[0029] Figure 2 This is a schematic diagram of the second state structure of the utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the battery compartment in the utility model.

[0031] Figure 4 It is a schematic diagram of the structure of the battery in the utility model.

[0032] Figure 5 This is a schematic diagram of the cooperation between the bracket and the support in the utility model.

[0033] Figure 6 This is a bottom view of the battery in the utility model.

[0034] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle,

[0035] Figure 8 This is a left view of the battery in the utility model.

[0036] Fig. 9 This is a right side view of the battery in the utility model.

[0037] Fig.10 for Fig. 9 The enlarged schematic diagram at A in the middle,

[0038] Fig.11 It is a structural schematic diagram of the roller group in the utility model.

[0039] Fig.12 for Fig.11 A longitudinal cross-sectional view of

[0040] Fig.13 for Fig.11 A top view of

[0041] Fig.14 It is a circuit diagram of the utility model.

[0042] Numbers in the figure:

[0043] 1.Battery;

[0044] 101. battery housing; 102. bracket; 103. adjustable DC / DC converter; 104. micro switch; 105. indicator light; 106. hook plate; 107. pin plate; 108. buckle plate; 109. fastening bolt; 110. pin; 111. groove; 112. first bracket block; 113. second bracket block; 114. ball head contact;

[0045] 2. Battery compartment;

[0046] 201, rear bottom plate; 202, rear wall plate; 203, buckle plate; 204, front bottom plate; 205, limit block; 206, front wall plate; 207, crossbeam plate; 208, rib plate; 209, bracket; 210, rubber pad; 211, lock buckle; 212, guard plate;

[0047] 3. Roller group;

[0048] 301, copper busbar; 302, copper sheet; 303, insulating plate; 304, supporting plate, 3041, notch; 305, supporting seat; 306, electromagnet; 307, copper sleeve; 308, permanent magnet; 309, connecting tube; 310, universal wheel. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] See also Figure 1-14 The utility model provides a forklift quick-change battery device, comprising a battery 1 arranged inside a battery compartment 2, wherein the battery 1 comprises a battery housing 101, and a roller group 3 is symmetrically and detachably mounted on the bottom end surface of the battery housing 101 at both ends in the moving direction;

[0051] like Fig.11 , 12 As shown, the roller group 3 includes a moving part and a supporting part, the supporting part includes a connecting tube 309 with an opening at the top, a universal wheel 310 is fixedly provided at the bottom end of the connecting tube 309, and a permanent magnet 308 is fixedly provided at the bottom of the inner cavity of the connecting tube 309; the moving part includes a supporting plate 304 connected to the battery housing 101, a conductive device is fixedly provided on the top surface of the supporting plate 304, and a supporting seat 305 is fixedly provided at the bottom end of the supporting plate 304; the supporting seat 305 is movably embedded in the connecting tube 309; an electromagnet 306 is embedded in the bottom of the supporting seat 305, and the electromagnet 306 is electrically connected to the conductive device; when the electromagnet 306 is energized, it generates a repulsive force with the permanent magnet 308, driving the moving part to move upward along the connecting tube 309 to lift the battery 1 out of the battery compartment 2.

[0052] The battery compartment in the utility model is a part of the forklift body structure, which is installed on the frame between the front axle and the rear axle, and a space for installing the roller group is reserved between the bottom and the ground.

[0053] The battery 1 is built into the battery compartment 2. In order to prevent the battery from shaking and causing damage during the driving of the forklift, the battery is generally restricted in the battery compartment by a limiting member.

[0054] In the utility model, there are multiple roller groups, which are symmetrically arranged at both ends of the battery to support the weight of the battery. The electromagnet 306 generates an electromagnetic field when it is energized, and generates a repulsive force with the permanent magnet 308. The magnitude of the repulsive force is related to the power source of the electromagnet, the distance between the electromagnet and the permanent magnet, and the weight of the battery. The magnitude of the current is controlled according to the weight of the battery, so that the repulsive force generated can drive the moving part to lift the battery 1, so that the battery 1 is separated from the limiter in the battery compartment 2, and then the universal wheel on the supporting part is moved to move the battery 1 out of the battery compartment and transport it to a designated place for charging. At this time, the roller group is disassembled and reused.

[0055] That is, in this embodiment, the conductive device can be connected to an external power source to energize the electromagnet.

[0056] In another embodiment, the battery 1 can be energized by connecting the conductive device to the battery 1, that is, a ball head contact electrically connected to the battery is provided at the bottom of the battery, and the circuit is connected when the conductive device contacts the ball head contact. The details are as follows:

[0057] The conductive device includes an insulating plate 303 fixed on the top surface of the support plate 304, and a copper bar 301 and two copper sheets 302 arranged in the middle of the copper bar 301 are symmetrically arranged on the insulating plate 303. The two copper sheets are respectively connected to the positive and negative electrodes of the electromagnet 306. The copper bar 301 and the copper sheets 302 are arranged as shown in FIG. Fig.13 shown.

[0058] The insulating plate is provided to prevent the copper sheet and copper bar from being connected and insulated from other parts. The positive and negative poles of the electromagnet are connected to the two copper sheets respectively. When the electromagnet is not energized, the moving part and the supporting part of the roller assembly are assembled together under the magnetic force of the permanent magnet. When the electromagnet is energized, it generates a repulsive force with the permanent magnet, driving the moving part to move upward along the connecting tube 309 and separate.

[0059] The inner wall of the connecting tube 309 is sleeved with a copper sleeve 307 ; the bottom side of one end of the supporting plate 304 is provided with a notch 3041 for engaging with the battery housing 101 , so as to facilitate the installation of the roller assembly at the bottom end of the battery housing 101 .

[0060] The copper sleeve in this embodiment has the following functions: first, it has a sliding and self-lubricating effect; second, it prevents the magnetic field of the electromagnet from overflowing and interfering with other electrical components.

[0061] like Figure 4As shown, an adjustable DC / DC converter 103 is installed on the outer wall of the battery housing 101, and the power supply end of the adjustable DC / DC converter 103 is electrically connected to the battery 1; the bottom plate of the battery housing 101 is provided with a groove 111 for mounting the roller group 3, and a ball head contact 114 is arranged on the groove 111; the output end of the adjustable DC / DC converter 103 is electrically connected to the conductive device through the ball head contact 114.

[0062] In this embodiment, the groove 111 is a rectangular structure, and the ball head contact 114 is insulated from the battery housing 101. The arrangement of the ball head contact 114 is as follows: Figure 7 As shown, the ball head contacts 114 are arranged in three rows along the length direction of the groove 111, with two in each row; the middle row contains + contacts and - contacts, and the two rows on both sides contain -1 contacts, -2 contacts and +1 contacts, +2 contacts respectively; the + contacts are connected to the +1 contacts, and the - contacts are connected to the -2 contacts.

[0063] Circuit such as Fig.14 As shown, the power supply end of the adjustable DC / DC converter 103 is electrically connected to the battery 1, and the positive and negative electrodes of each electromagnet 306 are connected in parallel to the adjustable DC / DC converter 103. Taking the ball head contact 114 in one of the grooves 111 as an example, the -1 contact and the +2 contact are respectively connected to the negative electrode and the positive electrode of the adjustable DC / DC converter 103; when the roller group 3 is installed in the groove 111, the two copper bars 301 respectively connect the -1 contact with the -2 contact, and the +1 contact with the +2 contact, and the two copper sheets 302 are respectively connected to the + contact and the - contact, and the two copper sheets 302 are respectively connected to the positive and negative electrodes of the electromagnet 306, so that the circuit of the electromagnet 306 is connected to it and energized to generate a repulsive force with the permanent magnet. The current flows as follows: adjustable DC / DC converter 103+, +2 contact, copper bus, +1 contact, + contact, copper sheet +, electromagnet, copper sheet -, - contact, -2 contact, -1 contact, adjustable DC / DC converter 103 - to form an electrical circuit, that is, the electromagnet circuit is connected.

[0064] When the roller assembly is not installed, the -1 contact and the -2 contact, the +1 contact and the +2 contact are all disconnected, that is, the -1 contact, the -2 contact, the +1 contact and the +2 contact can be connected only after being connected to the copper busbar respectively, thereby ensuring that the spacing between the ball head contacts at the two output ends of the adjustable DC / DC converter is maximum (diagonally set), thereby minimizing the probability of short circuit failure.

[0065] In this embodiment, "connection" refers to connection with a wire, and "communication" and "connection" refer to connection of a circuit by conduction.

[0066] More preferably, the roller groups 3 and the grooves 111 are in one-to-one correspondence, and the number of the roller groups 3 is 2N, where N ≥ 2. The number of roller groups 3 is determined according to the weight of the battery and the force carried by a single roller group; for example, when the weight of the battery is 510 kg, the number of roller groups can be designed to be 6, symmetrically arranged on both sides, that is, the load-bearing weight of each roller group is 85 kg.

[0067] The roller groups 3 are evenly distributed on the two bottom sides of the battery housing 101 in a symmetrical distribution, so the weight carried by each roller group 3 is the same, and each ball head contact 114 and the electromagnet circuit in each roller group 3 are connected in parallel, so the voltage and current values ​​of each electromagnet circuit are equal. The adjustable DC / DC converter 103 can simultaneously control the lifting of each roller group and the lifting height is the same.

[0068] In another embodiment, a micro switch 104 and an indicator light 105 are installed on the battery housing 101, and the micro switch 104 and the indicator light 105 are connected in series and then connected in parallel to the adjustable DC / DC converter 103 (such as Fig.14 ).

[0069] Specifically, the adjustable DC / DC converter 103 is installed at the upper corner of an outer wall of the battery housing 101, an indicator light is installed next to it, and a micro switch is installed at the diagonal corner of the other outer wall opposite to it. In this embodiment, the micro switch 104 is a normally open type. When the battery 1 is slowly fed into the battery compartment 2, the micro switch 104 is touched to close it, and the indicator light 105 is turned on, that is, the indicator light 105 is on, indicating that the battery 1 is installed in place.

[0070] like Figure 6-10 As shown, a first bracket 112 and a second bracket 113 are fixedly provided on the bottom plate of the battery housing 101 on both sides of the groove 111, respectively. The distance between the first bracket and the second bracket is smaller than the width of the groove; a convex strip (such as Fig.10 ), which is used to be clamped with the support plate 304. The bottom side of one end of the support plate 304 on the roller group 3 is provided with a notch 3041 (such as Fig.12 As shown in the figure, when the roller assembly 3 is pushed into the groove 111 at the bottom of the battery housing 101, the notch 3041 thereof just matches and engages with the convex strip on the first bracket, so as to facilitate its positioning and installation.

[0071] A hook plate 106 and a pin plate 107 are fixedly disposed on the side walls of the battery housing 101 located outside the first bracket 112 and the second bracket 13, respectively. In this embodiment, the hook plate 106 and the pin plate 107 are both L-shaped structures, the horizontal sections of which are fixed on the bottom plate of the battery housing 101, and the vertical sections are located on the side walls of the battery housing 101 and extend upward with a gap between the side walls. The pin plate 107 is rotatably connected with a buckle plate 108, that is, the buckle plate 108 is connected to the pin plate 107 through a pin 110 and can rotate freely. When the roller assembly 3 is installed in place, the movable end of the buckle plate 108 is moved down to connect with the hook plate 106, and fixed with a fastening bolt 109, and its top end passes through the buckle plate 108 and abuts against the support plate 304 of the roller assembly 3, thereby blocking the outer end of the groove 111, thereby further limiting the roller assembly 3.

[0072] The left and right positions of the first support block 112 and the second support block 113 can be adjusted. Figure 8 , 9 As shown (the buckle plate is omitted in all figures).

[0073] A bracket 102 is fixedly provided on the outer walls of both sides of the battery housing 101, and a bracket 209 is fixedly provided on the inner wall of the wall panel of the battery compartment 2. The bracket 209 supports the bracket 102 to limit the battery 1 in the vertical direction; a limiting plate 205 is fixedly provided on the bottom plate of the battery compartment 2 to limit the battery 1 in the horizontal direction.

[0074] In this embodiment, the bracket 102 and the bracket 209 are both adapted concave circular structures. A rubber pad 210 is fixedly provided on the upper end surface of the bracket 2, and a rib plate 208 fixedly connected to the battery housing 101 is installed below. The matching schematic diagram is shown in Figure 5.

[0075] That is, the battery 1 is limited in position by supporting its bracket 102 through the bracket 209 in the battery compartment to prevent it from shaking. The bracket 102 is provided with a threaded hole for hoisting, which can realize the hoisting and auxiliary movement of a heavy battery.

[0076] The structure of the battery compartment 2 is as follows Figure 3 As shown, it includes a box structure consisting of wall panels, movable panels, bottom panels and crossbeam panels 207, wherein the wall panels are front wall panels 206 and rear wall panels 202 arranged opposite to each other, and the movable panels are two movable panels arranged opposite to each other; the bottom panels include a front bottom panel 204 and a rear bottom panel 201 respectively connected to the wall panels, and a guard plate 212 is movably connected between the front and rear bottom panels; the limit plates 205 are installed on the front and rear bottom panels.

[0077] In a further solution, lock buckles 211 are respectively installed at the two ends of the guard plate 212, and buckle plates 203 adapted to the lock buckles 211 are respectively installed at the ends of the front and rear bottom plates.

[0078] Specifically, the top of the battery compartment 2 is provided with an openable hood cover, which is located above the crossbeam plate 207; both ends of the battery compartment are provided with openable movable plates, and two sets of buckle plates 203 are fixedly provided at the rear end of the front bottom plate and the front end of the rear bottom plate, and are connected to the buckle plates 203 through the lock buckle 211 on the guard plate 212, so that the guard plate 212 can be detachably installed at the bottom of the battery compartment. Installing the guard plate can reduce the impact of foreign matter such as dust and water stains on the ball head contact, and removing the guard plate can facilitate the installation of the roller group 3. The inner side walls of the front and rear wall plates are provided with two sets of brackets 209 and ribs 208 for strengthening the support brackets, which are used to limit the vertical direction of the battery; a limit plate 205 is installed at the rear ends of the front and rear bottom plates respectively, which is used to limit the moving direction of the battery 1.

[0079] The power replacement process of this device is as follows:

[0080] The battery weighs 510kg, and there are 6 grooves at the bottom of the battery, and 6 roller groups are configured accordingly, that is, the load-bearing weight of each roller group is 85kg.

[0081] When the battery power drops to 20%, the forklift stops working and the connection between the forklift and the battery is cut off. Figure 1 Operate the device in the middle: open the movable plates at both ends of the battery compartment, remove the guard plate, and install the roller group in the grooves at both ends of the bottom of the battery shell in turn. Turn the buckle plate and tighten it with the fastening bolts to install the roller group in place. The copper bar and copper sheet on the top of the roller group are connected to the ball head contacts in the groove to connect the circuit of the electromagnet. Then press the switch button of the adjustable DC / DC converter to energize the electromagnet, and slowly adjust the current value through the switch knob. Due to the repulsion between the polarities of the electromagnet and the permanent magnet, a repulsive force is generated, causing the moving part of the roller group to move upward until the battery is lifted up, so that the lower surface of the bracket is higher than the surface on the bracket, and the bottom of the battery is higher than the limit block, that is, the battery is out of the limit of the battery compartment, mark the current value at this time, and move the battery out of the battery compartment through the universal wheel on the roller group (such as Figure 2 Then transport it to the designated location for charging, remove the roller assembly from the battery, unscrew the fastening bolts, rotate the buckle plate to a vertical state, and pull the roller assembly outward.

[0082] Then install the removed roller assembly on the fully charged battery to be replaced, adjust the output current of the adjustable DC / DC converter to the current value marked above, and transport it to the forklift. Slowly put the battery into the battery compartment. When the micro switch on the battery touches the positioning frame on the battery compartment, close it and turn on the indicator light, that is, the indicator light is on, indicating that the battery is installed in place. Then slowly lower the current value to zero. The bracket on the battery is set on the bracket on the battery compartment and the limit plate together with the limit plate to limit the battery to prevent the battery from shaking. Turn off the adjustable DC / DC converter, remove the roller assembly, install the guard plate, turn on the forklift power, close the movable plates at both ends of the battery compartment, and put the roller assembly into the vehicle tool box.

[0083] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0084] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A forklift quick-change battery device, comprising a battery (1) arranged inside a battery compartment (2), characterized in that: The battery (1) comprises a battery housing (101), and roller groups (3) are symmetrically and detachably mounted on the bottom end surface of the battery housing (101) at both ends in the moving direction; The roller group (3) comprises a moving part and a supporting part, wherein the supporting part comprises a connecting tube (309) with an opening at the top end, a universal wheel (310) is fixedly arranged at the bottom end of the connecting tube (309), and a permanent magnet (308) is fixedly arranged at the bottom of the inner cavity of the connecting tube (309); the moving part comprises a supporting plate (304) connected to the battery housing (101), a conductive device is fixedly arranged at the top surface of the supporting plate (304), and a supporting seat (305) is fixedly arranged at the bottom end of the supporting plate (304); the supporting seat (305) is movably embedded in the connecting tube (309); an electromagnet (306) is embedded at the bottom of the supporting seat (305), and the electromagnet (306) is electrically connected to the conductive device; when the electromagnet (306) is energized, a repulsive force is generated with the permanent magnet (308), driving the moving part to move upward along the connecting tube (309) to lift the battery (1) out of the battery compartment (2).

2. A forklift quick-change battery device according to claim 1, characterized in that: The conductive device comprises an insulating plate (303) fixed on the top surface of a support plate (304), a copper bar (301) and two copper sheets (302) arranged in the middle of the copper bar (301) are symmetrically arranged on the insulating plate (303), and the two copper sheets are respectively connected to the positive and negative electrodes of the electromagnet (306).

3. A forklift quick-change battery device according to claim 1, characterized in that: The inner wall of the connecting tube (309) is sleeved with a copper sleeve (307); and a notch (3041) for clamping with the battery housing (101) is provided on the bottom side of one end of the supporting plate (304).

4. A forklift quick-change battery device according to claim 2, characterized in that: An adjustable DC / DC converter (103) is installed on the outer wall of the battery housing (101), and the power supply end of the adjustable DC / DC converter (103) is electrically connected to the battery (1); a groove (111) for installing the roller group (3) is provided on the bottom plate of the battery housing (101), and a ball head contact (114) is arranged on the groove (111); and the output end of the adjustable DC / DC converter (103) is electrically connected to the conductive device via the ball head contact (114).

5. A forklift quick-change battery device according to claim 4, characterized in that: The roller groups (3) and the grooves (111) are in one-to-one correspondence, and the number of the roller groups (3) is 2N, where N≥2; A micro switch (104) and an indicator light (105) are installed on the battery housing (101); the micro switch (104) and the indicator light (105) are connected in series and then in parallel to an adjustable DC / DC converter (103).

6. A forklift quick-change battery device according to claim 4, characterized in that: A first support block (112) and a second support block (113) are fixedly provided on the bottom plate of the battery housing (101) on both sides of the groove (111), respectively, and the distance between the first support block and the second support block is smaller than the width of the groove; a convex strip is fixedly provided on one side of the first support block close to the center of the groove for clamping with the support plate (304).

7. A forklift quick-change battery device according to claim 4, characterized in that: A hook plate (106) and a pin plate (107) are respectively fixedly provided on the outer sides of the first bracket block (112) and the second bracket block (113) at the bottom end surface of the battery housing (101); a buckle plate (108) is rotatably connected to the pin plate (107); and the movable end of the buckle plate (108) is connected and fixed to the hook plate (106) to fix the roller assembly (3).

8. A forklift quick-change battery device according to claim 1, characterized in that: Brackets (102) are fixedly provided on the outer walls of both sides of the battery housing (101); brackets (209) are fixedly provided on the inner walls of the wall panels of the battery compartment (2); the brackets (209) support the brackets (102) to limit the position of the battery (1) in the vertical direction; and a limiting plate (205) is fixedly provided on the bottom plate of the battery compartment (2) to limit the position of the battery (1) in the horizontal direction.

9. A forklift quick-change battery device according to claim 8, characterized in that: The battery compartment (2) comprises a box structure consisting of a wall panel, a movable panel, a bottom panel and a crossbeam panel (207); the wall panel comprises a front wall panel (206) and a rear wall panel (202) arranged opposite to each other; the movable panel comprises two movable panels arranged opposite to each other; the bottom panel comprises a front bottom panel (204) and a rear bottom panel (201) respectively connected to the wall panels; a guard plate (212) is movably connected between the front and rear bottom panels; and the limit plate (205) is mounted on the front and rear bottom panels.

10. A forklift quick-change battery device according to claim 9, characterized in that: The support (102) and the bracket (209) are both adapted concave circular structures; a rubber pad (210) is fixedly provided on the upper end surface of the support (102), and a rib plate (208) fixedly connected to the battery housing (101) is installed below; Lock buckles (211) are respectively installed at the two ends of the guard plate (212), and buckle plates (203) adapted to the lock buckles (211) are respectively installed at the ends of the front and rear bottom plates.

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