A lithium battery fork truck capable of rapid power compensation

Abstract

The application relates to a lithium battery fork truck capable of quickly supplementing electricity, which comprises a vehicle frame, a first battery compartment and a second battery compartment arranged upward and downward on the vehicle frame, wherein the first battery compartment is upwardly open, the second battery compartment is open at the side, a standard battery box or a plurality of quick-change batteries are arranged in the second battery compartment, the weight and the battery capacity of the quick-change batteries are smaller than those of the standard battery box, the electrical elements of the standard battery box and the quick-change batteries are integrated in an electrical box, BMS signal collectors are arranged on the standard battery box and the quick-change batteries respectively, an electrical box mounting compartment is arranged between the first battery compartment and the second battery compartment, an electrical box is arranged in the electrical box mounting compartment, the electrical box comprises a BMS battery management system, the electrical box is connected with a controller, and the standard battery box and / or the quick-change battery box arranged in the first battery compartment and the second battery compartment are connected with the electrical box. The above scheme can provide different battery capacities to meet different application scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery forklifts, and particularly relates to a lithium battery forklift capable of being quickly recharged. BACKGROUND

[0002] The lithium battery forklift has the characteristics of fast charging, and the use of interval recharging can meet the demand for long endurance, but the following shortcomings exist:

[0003] The charging process requires a certain charging time, and the lithium battery forklift cannot continue to perform the carrying work during the charging process, and cannot guarantee continuous work. In particular, for some special use scenarios, no charging equipment is provided, and the battery cannot be recharged. The standard capacity battery in the existing lithium battery forklift has a large volume and weight, and in the scenario of replacing the battery, the lithium battery cannot be moved by manpower alone without the aid of a carrying tool. In addition, in the logistics and leasing industry, the use time of the forklift is uncontrollable, and the specific demand for the battery capacity is also random, and the standard capacity battery used in the existing lithium battery forklift cannot meet the individualized demand of the user for the battery capacity. Therefore, it is necessary to improve the capacity, volume, structure and replacement mode of the battery of the lithium battery forklift so as to meet the different needs of customers in different working conditions and different application scenarios. SUMMARY

[0004] In order to solve the above problems, the purpose of the present application is to provide a lithium battery forklift capable of being quickly recharged.

[0005] A lithium battery forklift capable of being quickly recharged comprises a vehicle frame, a first battery compartment and a second battery compartment arranged above and below the vehicle frame, wherein the first battery compartment is upwardly open, and the second battery compartment is open at the side edge, and a standard battery box or a plurality of quick-change batteries are arranged in the second battery compartment, the weight and battery capacity of the quick-change battery being less than those of the standard battery box; the electrical elements of the standard battery box and the quick-change battery are integrated in an electrical box, and a BMS signal collector is arranged on each of the standard battery box and the quick-change battery; an electrical box mounting compartment is arranged between the first battery compartment and the second battery compartment, and an electrical box is arranged in the electrical box mounting compartment, the electrical box comprising a BMS battery management system, and the electrical box is connected with a controller, and the standard battery box and / or the quick-change battery box arranged in the first battery compartment and the second battery compartment are connected with the electrical box.

[0006] Preferably, one standard battery box is arranged in the first battery compartment, and the standard battery box is connected with the electrical box.

[0007] Preferably, removable elevation steps are connected to the two sides of the bottom of the standard battery box, and a space for a carrying tool to enter is formed between the elevation steps on the two sides of the bottom of the standard battery box after the standard battery box is arranged in the second battery compartment.

[0008] As preferred, one or more than one side-pulling slide frame is arranged in the second battery compartment, the side-pulling slide frame is of a drawer type structure, comprising a slide rail assembly and a support frame, the slide rail assembly is arranged along the opening direction of the second battery compartment; the quick-change battery box is mounted on the side-pulling slide frame.

[0009] As preferred, one or more than one quick-change battery is arranged side by side on the side-pulling slide frame.

[0010] As preferred, a handle is arranged on the quick-change battery, when the side-pulling slide frame drives the quick-change battery thereon to move out of the second battery compartment, the handle is exposed from the side edge of the side-pulling slide frame.

[0011] As preferred, double-layer side-pulling slide frames are arranged in the second battery compartment, and a plurality of quick-change batteries arranged side by side can be arranged on each layer of the side-pulling slide frame.

[0012] As preferred, a battery connection interface corresponding to the standard battery box and the quick-change battery box is arranged on the electrical appliance box, and the number of the battery connection interface corresponding to the quick-change battery is the same as the maximum number of the quick-change batteries that can be arranged in the second battery compartment.

[0013] As preferred, a latch hole is arranged on the frame, a latch lock is arranged in the latch hole, a lock hole corresponding to the latch lock is arranged on the battery box mounted in the second battery compartment, after the battery box in the second battery compartment is mounted in place, the lock hole on the battery box is aligned with the latch, and the latch lock is inserted into the lock hole downward.

[0014] As preferred, the first battery compartment is upwardly opened, and a battery cover plate is arranged at the opening to close the first battery compartment, one end of the battery cover plate is upwardly turned to open the opening of the first battery compartment in a turning pivot point mode with the other end as the turning pivot point, and an air spring is arranged at the hinge of the battery cover plate.

[0015] According to the above scheme, the combination mode of the battery box in the first battery compartment and the second battery compartment can be arbitrarily changed according to the user's demand, different battery capacities are provided to meet different application scenarios. Moreover, the electrical elements are separated from the battery box, on the one hand, the volume of the battery box can be reduced, especially in the scenario of arranging a plurality of battery boxes, the overall volume of the lithium battery forklift can be effectively reduced; on the other hand, the electrical elements are arranged independently from the battery box, which is convenient for the maintenance of the electrical elements. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of a lithium battery forklift in embodiment 1;

[0017] Figure 2 It is an installation structure schematic view of an electrical appliance box in embodiment 1;

[0018] Figure 3 It is a battery installation support structure schematic view in embodiment 1;

[0019] Figure 4 Structure diagram of the standard battery box in Example 1;

[0020] Figure 5 Structure diagram of the electric appliance box in Example 1;

[0021] Figure 6 Structure diagram of a lithium battery forklift in Example 2;

[0022] Figure 7 Structure diagram of the side-pulling installation of the quick-change battery in Example 2;

[0023] Figure 8 Structure diagram of the installation of the quick-change battery in the second battery compartment in Example 2;

[0024] Figure 9 Structure diagram of the electric appliance box in Example 2;

[0025] Figure 10 Structure diagram of the quick-change battery in Example 2;

[0026] Figure 11 Structure diagram of the retraction of the battery box in the second battery compartment in Example 2;

[0027] Figure 12 Structure diagram of the side-pulling of the battery box in the second battery compartment in Example 2;

[0028] Figure 13 Structure diagram of the forklift when the side door flap is in the closed position in Example 3;

[0029] Figure 14 Structure diagram of the forklift when the side door flap is in the open position in Example 3;

[0030] Figure 15 Structure diagram of the battery bracket in Example 3;

[0031] Figure 16 Structure diagram of the installation of the quick-change battery and the battery bracket in Example 3;

[0032] Figure 17 Structure diagram of the installation of the side door flap in Example 3;

[0033] Figure 18 Structure diagram of Figure 13 Enlarged view of A in

[0034] Reference signs:

[0035] The frame 1, the first battery compartment 11, the battery cover plate 111, the cushioning block 112, the second battery compartment 12, the cushioning step 121, the connecting part 1211, the step part 1212, the abutting edge 1213, the electrical box mounting compartment 13, the side pull slide bracket 122, the slide rail assembly 1221, the bottom plate 1222, the front side baffle 1223, the rear side baffle 1224, the standard battery box 2, the battery core 21, the BMS signal acquisition interface 22, the copper strip 23, the electrical box connecting end 24, the first electrical box 3, the charge-discharge signal line interface 31, the quick-change battery 4, the handle 41, the fixing frame 42, the locking bolt 43, the second electrical box 5, the battery interface 51, the latch 6, the battery bracket 7, the side door flap 71, the bottom plate 72, the bent edge 73, the buffer pad 74, the buffer strip 75, the guide rail 76, the locking pin 81, the spring 82, and the hinge set 9. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described in detail below. Embodiments

[0037] The embodiment provides a lithium battery forklift capable of quickly supplementing power, comprising a frame, a safety canopy arranged on the frame, a driver seat arranged in the safety canopy, a control mechanism arranged on the front side of the driver seat, the control mechanism comprising a direction column, a steering device, a control rod and a multi-way valve, the lower end of the direction column being connected to the steering device for controlling the turning of the vehicle, the control rod being connected to the multi-way valve for controlling the lifting operation of the front fork of the lithium battery forklift, and each part of the control mechanism being arranged on an instrument rack, so that the overall installation structure of the control mechanism is compact and the overall volume of the vehicle is reduced. Preferably, in the embodiment, the electrical elements such as instruments and meter brushes that are conventionally arranged on the instrument table of the lithium battery forklift are arranged on one or more supports of the safety canopy, so that the instrument table is more simple and beautiful; in a preferred embodiment, the electrical elements are arranged on the right support leg of the safety canopy, so as to be more in line with the operation habits of users.

[0038] A drive axle is further arranged on the frame, the drive axle is located at the front part of the frame and is connected to a drive motor, a foot brake is located at the upper part of the drive motor, and a pump motor is located at the rear part of the frame to reduce the overall noise of the vehicle during operation. A counterweight is arranged at the rear part of the frame to balance the overall weight of the vehicle. A counterweight cavity is arranged in the counterweight, and a controller is attached to the counterweight cavity, so that the iron material of the counterweight is fully used for heat dissipation.

[0039] As Figure 3As shown, the vehicle frame 1 is provided with a first battery compartment 11 and a second battery compartment 12 arranged in an up-down manner, wherein the first battery compartment 11 is upwardly open and is provided with a battery cover plate 111 to close the first battery compartment 11. By providing an upward opening, the battery can be replaced by hoisting, and the battery cover plate can be opened at any time to check and maintain the battery, which is convenient to operate. In the embodiment, one end of the battery cover plate 111 is turned upward to open or close the opening of the first battery compartment 11 with the other end as the turning pivot. In this embodiment, the battery cover plate 111 at the opening of the first battery compartment 11 is connected with the seat of the driver's cabin, so that a larger force is required to open the battery cover plate 111. Based on this, a gas spring is arranged at the hinge of the battery cover plate 111 in this embodiment, which can provide assistance for opening the battery cover plate 111 and can keep the battery cover plate 111 in an open state, facilitating the detection and maintenance operation of the lithium battery in the first battery compartment 11.

[0040] In this embodiment, the lithium battery installed in the first battery compartment 11 is a standard battery box 2. The standard battery box 2 refers to a lithium battery box with a conventional capacity in the field of forklifts, but there is a difference in structure from the conventional capacity lithium battery box in the prior art. The battery box of the lithium battery forklift in the prior art includes a box body, a plurality of battery cores arranged in the box body, and a plurality of necessary electrical elements such as contactors, signal collectors, BMS management systems, and instruments. Since a large installation space is required for the installation of these electrical elements, and the lithium battery needs to provide a large capacity, the plurality of battery boxes themselves also have a large volume, so that the overall volume of the battery box of the lithium battery forklift in the prior art is large, and these electrical elements are arranged in the box body, which is not convenient for maintenance. Based on this, the structure of the standard battery box is improved in this embodiment, and all or most of the electrical elements of the battery box are separated from the standard battery box to form an independent electrical box, and the electrical box and the battery box are connected through a connection line such as a cable. By such arrangement, on the one hand, the volume of the battery box can be reduced, especially in the scenario of arranging a plurality of battery boxes, the overall volume of the lithium battery forklift can be effectively reduced; on the other hand, the electrical elements are arranged independently from the battery box, which is convenient for maintenance of the electrical elements. In the embodiment, the standard battery box 2 includes a box body and a plurality of battery cores 21 arranged in the box body, and a BMS signal collector and an electrical box connection interface are arranged on one side of the plurality of battery cores. The BMS signal collector and the electrical box connection interface themselves occupy a small space and only serve the function of signal collection, and the signal processing part is arranged in the electrical box. Therefore, the BMS management system is separated from the battery box, which can effectively reduce the volume of the standard battery box compared with the conventional lithium battery box.

[0041] As a preferred solution, as Figure 4As shown, the positive and negative poles of the plurality of battery cores 21 are connected by wires, and the wires are connected to the BMS signal collector 22 to collect signals of the battery cores and manage the battery cores. Figures 1-3 As shown, the second battery compartment 12 is a side-opened battery compartment, and a standard battery box 2 can be installed in the second battery compartment 12. The bottom of the standard battery box 2 is connected to a removable elevation step 121. When the standard battery box 2 is installed in the second battery compartment 12, the elevation step 121 allows a gap between the bottom of the standard battery box 2 and the bottom of the second battery compartment 12, so that a forklift or other handling tool can be inserted into the gap to handle the standard battery box 2, facilitating replacement of the standard battery box 2 in the second battery compartment 12. In a preferred embodiment, the elevation step 121 is an integral bent steel profile, which has a large strength. The elevation step 121 includes a connecting portion 1211 and a step portion 1212. The connecting portion 1211 is attached to the bottom of the second battery compartment 12. The upper end surface of the step portion 1212 is higher than the connecting portion 1211, and the upper end surface of the step portion 1212 is fixed to the box body of the standard battery box. In an alternative embodiment, the step portion 1212 is detachably connected to the box body of the standard battery box by bolts or other connectors. The connecting portion 1211 is located outside the step portion 1212, and the inner side of the step portion 1212 is vertically downwardly folded to form an abutting edge 1213 abutting the bottom of the second battery compartment 12. In this way, the structure of the elevation step 121 is simple, and the inner side edge does not interfere with the forklift when the forklift is used to handle the battery box. In a preferred embodiment, the connecting portion 1211 of the elevation step is provided with a plurality of first connecting holes at one end facing the side opening of the second battery compartment 12. The second battery compartment 12 is provided with a plurality of second connecting holes corresponding to the first connecting holes. Thus, after the standard battery box is installed in place in the second battery compartment, the position of the standard battery box in the second battery compartment can be locked by the connectors and the corresponding first and second connecting holes.

[0042] As a preferred embodiment, the first battery compartment 11 is provided with an elevation block 112 at each corner of the bottom of the first battery compartment 11 to elevate the battery box installed in the first battery compartment 11. Thus, after the standard battery box 2 is installed, a gap is formed between the bottom of the battery box and the bottom of the first battery compartment 11, and the connecting wires can be routed from the bottom of the battery box, facilitating reasonable arrangement of the wire harness and hiding the wire harness under the battery bottom.

[0043] As shown in Figure 2 and Figure 3 As shown, the first battery compartment 11 and the second battery compartment 12 are separated by an electrical box mounting compartment 13, and the electrical box mounting compartment 13 is provided with a wire routing opening communicating with the first battery compartment 11 and the second battery compartment 12. As shown in Figure 3As shown, the battery boxes in the first battery compartment 11 and the second battery compartment 12 are connected to the first electrical box 3, which is connected to the controller of the lithium battery forklift, and controls the battery boxes connected to the first electrical box 3. The first battery compartment 11, the electrical box mounting compartment 13, and the second battery compartment 12 are arranged as described above, and are independently distributed, facilitating the installation and disassembly of the internal components of each compartment, and there is no interference with other components, and the wiring is relatively independent, and the later addition and replacement is changed. In this embodiment, the first battery compartment 11 and the second battery compartment 12 are separated by the electrical box mounting compartment 13, that is, the bottom plate of the first battery compartment 11 and the top plate of the electrical box mounting compartment 13 are the same component, and the top plate of the second battery compartment 12 and the bottom plate of the electrical box are the same component. This arrangement makes the structure of the frame 1 compact, which helps to reduce the overall size.

[0044] In an alternative embodiment, the structure of the first electrical box 3 is as shown in Figure 2 and 5 As shown, the first electrical box 3 is connected to the controller of the lithium battery forklift, and is provided with a charging and discharging signal line interface 31 for controlling the corresponding battery box according to the signal from the operating mechanism. The first electrical box 3 in this embodiment is a master-slave electrical box, which can control 1-2 standard battery boxes 2, so that the user can choose whether to set standard battery boxes 2 in the first battery compartment 11 and the second battery compartment 12, or only set standard battery boxes 2 in one of them, to meet the individual needs of users for power.

[0045] In this embodiment, the lithium battery forklift has two battery compartments, the first battery compartment 11 and the second battery compartment 12, and the first electrical box 3 is provided with a connection interface connected to the two battery compartments. The user can set standard battery boxes 2 in the first battery compartment 11 and the second battery compartment 12 according to actual needs, so that both standard battery boxes 2 serve as power sources for the lithium battery forklift, allowing the lithium battery forklift to have greater battery capacity without significantly increasing its size, achieving long endurance. Embodiment

[0046] As shown in Figures 6-12 The difference between this embodiment and embodiment 1 is that the second battery compartment 12 in this embodiment does not have a standard battery box 2. The second battery compartment 12 is provided with one or more layers of side-pull slides 122, and each layer of side-pull slides 122 is provided with a plurality of side-by-side quick-change batteries 4. The quick-change batteries 4 are independent of each other and interchangeable lithium battery modules. The quick-change batteries 4 in this embodiment are as shown in Figure 10As shown, including the box and set in the battery box a plurality of small cells. The box is also provided with BMS signal collector, electrical box connection end and protection circuit, the protection circuit includes a fuse. The second electrical box 5 is arranged in the electrical box installation bin 13, the quick-change battery 4 and the second electrical box 5 are connected through the connecting line, the quick-change battery 4 box is provided with the interface for connecting with the second electrical box 5. The volume and the battery capacity of the quick-change battery 4 are less than the capacity of the standard battery box 2, because of its small volume, the user does not need to use tools to replace the quick-change battery 4. In this embodiment, each quick-change battery 4 is light in weight, and the battery can be replaced by one person by manpower without the aid of tools.

[0047] As shown in the figure, Figure 7 In this embodiment, the side-pulling slide frame 122 is a drawer type structure, including a slide rail assembly 1221 and a support frame, the slide rail assembly 1221 is arranged along the opening direction of the second battery bin 12, so as to realize the pull-out type mounting structure of the quick-change battery 4. The support frame includes a bottom plate 1222 and a front side baffle 1223 and a rear side baffle 1224 arranged on the front and rear sides of the bottom plate 1222 respectively, here the front and rear sides are described with the sliding direction of the slide rail assembly 1221 as the orientation reference, when the side-pulling slide frame 122 is retracted in the second battery bin 12, the front side baffle 1223 is closer to the opening of the second battery bin 12 than the rear side baffle 1224. In this embodiment, by setting the appropriate size of the front side baffle 1223, when all the side-pulling slide frames 122 are retracted in the second battery bin 12, their front side baffles 1223 can close the lateral opening of the second battery bin 12, as shown in the figure, Figure 11 and Figure 12 The slide rail assembly 1221 includes a first slide rail and a second slide rail which slide and guide each other, the first slide rail is fixed on both sides of the bottom plate 1222 and slides along the second slide rail with the support frame, so as to realize the above-mentioned drawer type structure. The support frame in this embodiment is an integral welded structure, which has a large supporting strength to support the battery box thereon.

[0048] As a preferred embodiment, as shown in the figure, Figure 7 and Figure 10 The quick-change battery 4 is provided with a handle 41, which is arranged towards the left side or the right side of the side-pulling slide frame 122, so that when replacing the quick-change battery 4, the quick-change battery 4 can be pulled from the side by the handle for battery replacement, which has a larger operation space and is more labor-saving than the replacement mode of lifting the quick-change battery 4 from above.

[0049] As shown in the figure, Figure 8 and Figure 9As shown, the second electrical box 5 in the embodiment is a multi-core electrical box, which is connected with the controller of the lithium battery forklift, and a plurality of battery interfaces 51 are arranged on the second electrical box 5, which are respectively used for connecting the standard battery in the first battery compartment 11 and the plurality of quick-change batteries 4 in the second battery compartment 12. The electrical elements of the standard battery box and the quick-change battery box are centrally arranged in the second electrical box, so as to realize independent control of the quick-change battery 4 box. In a specific embodiment, the maximum installation quantity of the quick-change battery 4 in the second battery compartment 12 is N, and the electrical box is correspondingly provided with N+1 battery interfaces 51. One of the battery interfaces 51 can be matched with the standard battery box 2 in the first battery compartment 11, and the remaining battery interfaces 51 are matched with the quick-change battery 4. The standard battery box 2 in the first battery compartment 11 and the quick-change battery 4 in the second battery compartment 12 are respectively connected to the corresponding interfaces on the second electrical box 5. In a specific embodiment, the user can set whether to arrange the quick-change battery 4 in the second battery compartment 12 according to specific needs, and set the number of the quick-change battery 4 arranged in the second battery compartment 12, so as to meet different battery capacity requirements.

[0050] As shown in Figure 11 and 12 shown, the frame is provided with a bolt hole, the bolt hole is provided with a bolt lock 6, the battery box is provided with a lock hole corresponding to the bolt lock 6, and after the battery box in the second battery compartment 12 is arranged in place, the lock hole on the battery box is aligned with the bolt, and the bolt lock 6 is inserted into the lock hole to realize the position locking of the battery box in the second battery compartment 12. When it is needed to pull out the battery box in the second battery compartment 12, the bolt lock 6 is only needed to be lifted upward to make it out of the lock hole of the battery box, so that the unlocking of the battery box is realized. The locking structure is simple. Embodiment

[0051] The difference between the embodiment and embodiment 2 is the difference in the installation mode of the quick-change battery. As shown in Figures 13-18 shown, the second battery compartment 12 in the embodiment is provided with a plurality of battery brackets 7 distributed in upper and lower layers; in other embodiments, only one battery bracket 7 can be arranged in the second battery compartment 12, and those skilled in the art can select according to the number of quick-change batteries 4 to be arranged and the required battery capacity. And those skilled in the art can understand that the number of layers of the battery bracket 7 limits the maximum number of quick-change batteries 4 that can be installed in the second battery compartment 12, and not all the quick-change batteries 4 need to be arranged on each battery bracket 7.

[0052] The battery bracket 7 is provided with an opening on one side, and the opening direction is consistent with the opening direction of the second battery compartment 12; the opening side of the battery bracket 7 is hingedly provided with a side door flap 71, and the side door flap 71 is located at the opening of the second battery compartment 12; the side door flap 71 can be flipped between a closed position and an open position; in the closed position, the side door flap 71 is perpendicular to the bottom plate 72 of the battery bracket 7, and the side door flap 71 is provided with a first locking mechanism for keeping it in the closed position; in the open position, the inner side of the side door flap 71 is flush with or below the bottom of the battery bracket 7; two or more than two quick-change batteries 4 are arranged side by side on the battery bracket 7, and the front ends of the quick-change batteries 4 are provided towards the opening side of the battery bracket 7.

[0053] Through the above arrangement, on the one hand, the quick-change battery 4 is used for power supply, and those skilled in the art can set the number of quick-change batteries 4 and the number of quick-change batteries 4 connected to the power consumption circuit according to the actual required capacity. And because the quick-change battery 4 is small in size and weight, the user does not need to use tools to replace the quick-change battery 4 by himself. On the other hand, due to the arrangement of the side door flap 71, it is not necessary to additionally arrange a door plate for closing the opening of the second battery compartment 12, and the pulling direction of the quick-change battery 4 is consistent with the flipping direction of the side door flap 71, so that the operation space required for replacing the battery will not increase due to the arrangement of the side door flap 71.

[0054] As shown in Figure 13 and Figure 14 In this embodiment, two layers of battery brackets 7 are arranged in the second battery compartment 12, and the side door flap 71 can be flipped within a range of 90°; when the side door flap 71 is in the closed position, the two side door flaps 71 cooperate to close the side opening of the second battery compartment 12; when the side door flap 71 is in the open position, the inner side of the side door flap 71 is flush with the upper end surface of the bottom plate 72 of the battery bracket 7 to support the extracted quick-change battery 4.

[0055] In the preferred embodiment, the side door flap 71 includes an inner side plate and an outer side plate, the inner side plate is a C-shaped bent plate, and the outer side plate is a flat plate; in the closed position, the outer side plate is flush with the side opening of the second battery compartment 12. The side flap is provided with the above two parts, on the one hand, the C-shaped bent plate can enhance the overall strength of the side door flap 71, and on the other hand, the outer side plate makes the appearance more simple and beautiful. And in the open position, the bottom of the outer side plate is located at the bottom of the battery bracket 7, so that the side door flap 71 can be kept in the position that the inner side is flush with the upper end surface of the bottom plate 72 of the battery bracket 7 by limiting the cooperation of the bottom of the outer side plate and the bottom of the battery bracket 7.

[0056] In combination with Figure 17As shown, the side door flap 71 in this embodiment is hinged to the front end of the battery bracket 7 through the hinge set 9, so as to realize the relatively flip-connecting of the side door flap 71 and the battery bracket 7.

[0057] As shown, Figure 15 As shown, the battery bracket 7 is divided into more than one battery mounting area arranged side by side, and the adjacent battery mounting areas are separated by the buffer strip 75. This arrangement can separate the quick-change batteries 4 in the adjacent battery mounting areas, preventing the safety hazards caused by battery collision.

[0058] Preferably, the rear side and the front and rear sides of the battery bracket 7 are respectively provided with upwardly folded bending edges 73, and the bending edges 73 are respectively provided with buffer pads 74 towards the side of the quick-change battery 4. The buffer pad 74 can be made of rubber material, and the buffer pad 74 on the bending edge 73 realizes the pre-tightening of the quick-change battery 4 in the battery mounting area, so that the quick-change battery 4 is reliably installed. Further, as shown, Figure 16 As shown, the housing of the quick-change battery 4 is provided with a second locking mechanism, which locks the relative position of the quick-change battery 4 and the battery bracket 7 through the second locking mechanism and the battery bracket 7. Through the second locking mechanism, the quick-change battery 4 can be kept in the pre-tightening state with the buffer pad 74, preventing the quick-change battery 4 from shifting during vehicle driving. In this embodiment, the second locking mechanism includes a fixed frame 42 fixed on the housing of the quick-change battery 4, and a locking bolt 43 threadedly connected on the fixed frame 42, and the battery bracket 7 is provided with a locking hole corresponding to the locking bolt 43. The position of the quick-change battery 4 on the battery bracket 7 is locked and unlocked through the cooperation of the locking bolt 43 and the hole, and the quick-change battery 4 is convenient to disassemble.

[0059] Further, as shown, Figure 15 As shown, the bottom plate 72 of the battery bracket 7 is provided with a guide rail 76 arranged in the battery pulling direction in each battery mounting area, and the bottom of the battery box of the quick-change battery 4 is provided with a guide groove corresponding to the guide rail 76. The installation position of the quick-change is guided through the cooperation of the guide rail 76 and the guide groove, which facilitates the loading of the quick-change battery 4. In a preferred embodiment, the guide rail 76 is arranged as a circular arc in cross-section, and the guide groove is arranged as a rectangle in cross-section. In this way, under the condition of ensuring the basic function of the guide rail 76, the contact area of the quick-change battery 4 and the guide rail 76 can be reduced, and the quick-change battery 4 can be pulled more smoothly.

[0060] As shown, Figure 16As shown, in order to facilitate the operation of the quick-change battery 4 box, the quick-change battery 4 is provided with a handle 41 at least at its front end, and preferably at both front and rear ends of the quick-change battery 4, so as to hold the quick-change battery 4. In this embodiment, the front end of the quick-change battery 4 box is provided with a wiring terminal, and the frontmost end of the fixing frame 42 is located in front of the frontmost end of the wiring terminal. In this way, sufficient wiring space can be ensured between the side door flap 71 and the wiring terminal when the side door flap 71 is in the closed position.

[0061] Referring to Figure 13 and in combination with Figure 18 , the left and right ends of the side door flap 71 are respectively provided with a sunken platform, and a first locking mechanism is arranged in the sunken platform. The first locking mechanism includes a spring 82 and a locking pin 81, and the locking pin 81 is coaxially arranged with the extension direction of the spring 82. A locking hole is arranged on the frame 1 corresponding to the locking pin 81. When the side door flap 71 is in the closed position, the locking pin 81 is aligned with the locking hole on the same side, and the locking pin 81 is clamped into the locking hole on the same side under the action of the restoring force of the spring 82. Embodiment

[0062] The difference between this embodiment and embodiment 1 is that no standard battery box is arranged in the first battery compartment in this embodiment, and a standard battery box 2 is arranged in the second battery compartment 12. Alternatively, no standard battery box is arranged in the first battery compartment, and a plurality of quick-change battery boxes are arranged in the second battery compartment. In this embodiment, the standard battery box or the quick-change battery box arranged in the second battery compartment supplies power to the lithium battery forklift.

[0063] Therefore, according to the above embodiments 1-4, the combination of the battery boxes in the first battery compartment 11 and the second battery compartment 12 can be arbitrarily changed according to the user's needs, and different battery capacities can be provided to meet different application scenarios.

[0064] For example, in use scenario one, the user uses the vehicle less, has low requirements for battery capacity, and does not frequently replace the battery box. In this use scenario, only a standard battery box 2 can be arranged in the first battery compartment 11 to ensure daily use of the vehicle.

[0065] In use scenario two, the user uses the vehicle more, has higher requirements for battery capacity, and has convenient charging in the use scenario. Two standard battery boxes can be selected and arranged in the first battery compartment 11 and the second battery compartment 12, respectively, and connected to the electric appliance box to ensure daily use of the vehicle.

[0066] In use scenario three, the user uses the vehicle frequently, has a long continuous working time, has high requirements for battery capacity, and has no time to charge and supplement power. A standard battery box can be selected and placed in the second battery compartment 12, so that the battery can be replaced laterally to ensure daily use of the vehicle. In this application scenario, the standard battery box in the second battery compartment can be quickly replaced with the help of a forklift or other tools.

[0067] Use scenario four: the user has no suitable place to charge and supplement electricity, and also has no suitable tool (forklift or travelling crane) to replace the battery. In this application scenario, the quick-change battery 4 scheme is set in the second battery compartment 12 according to embodiment 2, and 2-6 quick-change battery 4 boxes can be selected according to the needs. The quick-change battery 4 can meet the single-person replacement without the help of tools.

[0068] Use scenario five: the user is uncertain about the battery capacity required by himself and needs to switch capacity at any time. The standard battery box 2 can be installed in the first battery compartment 11, and the quick-change battery 4 can be installed in the second battery compartment. Assuming that the maximum number of quick-change batteries installed in the second battery compartment is N, 0-N quick-change batteries can be installed to meet different needs.

[0069] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A lithium battery forklift with rapid recharging capability, comprising a frame, characterized in that, The vehicle frame is equipped with a first battery compartment and a second battery compartment arranged vertically. The first battery compartment opens upward and is used to house a standard battery box or multiple quick-swap batteries. The second battery compartment has a side opening and contains multiple quick-change batteries. The weight and capacity of the quick-change batteries are smaller than those of the standard battery box. The electrical components of the standard battery box and the quick-change battery are integrated in the electrical box. The standard battery box and the quick-change battery are respectively equipped with BMS signal acquisition devices. An electrical box installation compartment is provided between the first battery compartment and the second battery compartment. An electrical box is provided in the electrical box installation compartment. The electrical box includes a BMS battery management system. The electrical box is connected to the controller. The battery boxes set in the first battery compartment and the second battery compartment are respectively connected to the electrical box. The second battery compartment is equipped with multiple battery racks arranged vertically, or the second battery compartment has a single battery rack. The battery rack is divided into one or more battery mounting areas arranged side by side, with adjacent battery mounting areas separated by buffer strips. Each battery mounting area on the bottom plate of the battery rack is provided with a guide rail arranged along the battery pulling direction, and the bottom of the quick-change battery box is provided with a guide groove corresponding to the guide rail. The opening side of the battery rack is hinged with a side door flap, which can be rotated within a 90° range. When the side door flap is in the open position, the inner side of the side door flap is flush with the upper surface of the bottom plate of the battery rack to support the pulled-out quick-change battery.

2. The lithium battery forklift with rapid recharging capability according to claim 1, characterized in that, The electrical box is provided with battery connection interfaces corresponding to the standard battery box and the quick-change battery box, and the number of battery interfaces corresponding to the quick-change batteries is the same as the maximum number of quick-change batteries that can be set in the second battery compartment.

3. The lithium battery forklift with rapid recharging capability according to claim 1, characterized in that, The frame is provided with a pin hole, and a pin lock is provided in the pin hole. The battery box installed in the second battery compartment is provided with a lock hole corresponding to the pin lock. After the battery box in the second battery compartment is installed in place, the lock hole on the battery box is aligned with the pin, and the pin lock is inserted downward into the lock hole.

4. A lithium battery forklift with rapid recharging capability according to claim 1, characterized in that, The first battery compartment opens upwards and is covered by a battery cover to close it. The opening of the first battery compartment is opened by flipping one end of the battery cover upwards with the other end as the pivot point. A gas spring is provided at the hinge of the battery cover.

5. A lithium battery forklift with rapid recharging capability according to claim 1, characterized in that, The quick-change battery casing is equipped with a second locking mechanism, which is connected to the battery tray to lock the relative position of the quick-change battery and the battery tray.

6. A lithium battery forklift with rapid recharging capability according to claim 1, characterized in that, The battery holder has upward-folding bent edges on its rear side and both front and rear sides, and each of the bent edges has a buffer pad on the side facing the quick-change battery.

Images