Lithium battery forklift

Abstract

The lithium battery forklift comprises a frame, a battery bin is arranged on the frame, a lithium battery system is arranged in the battery bin, and the lithium battery system comprises a battery supporting plate, a battery management control box and one or more forklift lithium batteries. The power supply voltage of the single forklift lithium battery is smaller than the working voltage of the forklift, and a first electric plug connector is arranged on the forklift lithium battery; one or more groups of battery modules are divided on the battery supporting plate, each battery module comprises more than one battery mounting position, one battery mounting position is used for mounting one forklift lithium battery, and a second electric plug connector matched with a first electric plug connector of the lithium battery is arranged in each battery mounting position; the second plug connectors in the same battery module are connected in series to the battery management control box, and the adjacent battery modules are connected in parallel to the battery management control box. According to the scheme, the lithium battery can be replaced in the battery bin with the upper opening without the help of an external tool.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a lithium battery forklift. Background Art

[0002] Due to the fast charging characteristic of the lithium battery forklift, supplementary charging during use intervals can meet the demand for long endurance. However, there are the following deficiencies:

[0003] The charging process requires a certain charging time. During the charging process, the lithium battery forklift cannot continue to perform handling work, and continuous operation cannot be guaranteed. Especially for some special usage scenarios where no charging equipment is provided, charging and supplementary charging are impossible. The standard capacity batteries in existing lithium battery forklifts themselves have a large volume and weight. In the scenario of replacing batteries, it is impossible to move the lithium battery by manpower alone without the aid of handling tools.

[0004] In response to the above problems, the Chinese invention patent application with the publication number CN118026056A previously submitted by the applicant provided a solution, which proposed to use multiple quick-change batteries to supply power to the forklift, and the multiple quick-change batteries were respectively connected to the electrical box. The above solution has the following deficiencies: Multiple quick-change batteries are connected in parallel to the electrical box. That is to say, a single quick-change battery needs to meet the power supply voltage of the forklift. For example, for a lithium battery forklift with a working voltage of 80V, according to the above setting method of the quick-change battery, a quick-change battery with a voltage of 80V needs to be used. To meet this power supply voltage requirement, the weight of a single quick-change battery is still relatively large, which is not suitable for a battery compartment with an upper opening. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the utility model is to provide a lithium battery forklift that can replace the lithium battery without the aid of external tools in a battery compartment with an upper opening.

[0006] A lithium battery forklift includes a vehicle frame. A battery compartment is provided on the vehicle frame, and a lithium battery system is provided in the battery compartment. The lithium battery system includes a battery tray, a battery management control box, and more than one forklift lithium battery. The power supply voltage of a single forklift lithium battery is less than the working voltage of the forklift. A first electrical connector is provided on the forklift lithium battery. The battery tray is installed on the forklift bracket. One set and more than one set of battery modules are demarcated on the battery tray. Each battery module includes more than one battery installation position. One battery installation position is used to install one forklift lithium battery. A second electrical connector matching the first electrical connector of the lithium battery is provided in each battery installation position. The second connectors in the same battery module are connected in series to the battery management control box, and adjacent battery modules are connected in parallel to the battery management control box. The more than one forklift lithium battery is installed in the battery installation position, and the first electrical connector is inserted and matched with the second electrical connector.

[0007] Due to the adoption of the above-mentioned solution, the present utility model does not require the power supply voltage of a single lithium battery to meet the working voltage of a lithium battery forklift, and there is no requirement for the power supply voltage of a single lithium battery. Therefore, the monomer weight and volume of the lithium battery of the forklift can be further reduced, facilitating the replacement of the lithium battery by an operator alone without the aid of external tools, and thus can be used in a battery compartment with an upper opening, and the replacement of the lithium battery can also be easily achieved. Moreover, according to the above-mentioned setting method of the lithium battery vehicle and the battery pallet, the expansion of the forklift battery can be realized by setting multiple battery modules. And in the case of setting multiple battery modules, lithium batteries can be connected into the battery modules according to actual battery capacity requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 FIG. is a schematic structural diagram of a lithium battery forklift;

[0009] Figure 2 FIG. is a schematic structural diagram of a vehicle frame and a lithium battery system thereon;

[0010] Figure 3 FIG. is a sectional view of a vehicle frame and a lithium battery system thereon.

[0011] Figure 4 FIG. is a schematic structural diagram of a lithium battery for a forklift in the present application;

[0012] Figure 5 FIG. is an exploded view of a lithium battery for a forklift in the present application;

[0013] Figure 6 FIG. is a schematic structural diagram of a lithium battery system in the present application;

[0014] Figure 7 FIG. is a schematic structural diagram of a battery bracket and a battery management control box;

[0015] Figure 8 For Figure 7 FIG. of another angle.

[0016] Reference numerals:

[0017] Lithium battery forklift 1, first electrical connector 11, first positioning member 12, second positioning member 13, upper box body 141, lower box body 142, long screw 15, battery core 16, handle 17;

[0018] Battery pallet 2, battery installation position 21, second electrical connector 22, positioning hole 23;

[0019] Battery management control box 3,

[0020] Vehicle frame 5, battery compartment 51, upper pressing plate 52, front side support plate 53, rear side support plate 54, fastener 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The embodiments of the present utility model will be described in detail below.

[0022] As Figures 1-3 shown, this embodiment provides a lithium battery forklift, including a vehicle frame 5, on which a battery compartment 51 is provided. The battery compartment 51 opens upward, and a lithium battery system is provided in the battery compartment 51. As Figure 6 shown, the lithium battery system includes a battery tray 2, a battery management control box, and more than one forklift lithium battery 1.

[0023] As Figure 4 and 5 shown, the forklift lithium battery 1 includes a battery box, in which a plurality of battery cores 16 connected in series with each other are provided. A first electrical connector 11 exposed outward is provided on the battery box, and the first electrical connector 11 is electrically connected to the battery cores 16. The first electrical connector 11 can be in the form of a male head or a female head. Among them, the power supply voltage of a single battery box is less than the working voltage of the lithium battery forklift powered by this lithium battery. When installed on the lithium battery forklift for use, the working voltage requirement of the lithium battery forklift is achieved by connecting more than one lithium battery in series, and the electrical connection between the lithium batteries is realized by connecting the first electrical connectors 11 on adjacent battery boxes through electrical connection lines.

[0024] According to the above settings, it is not necessary for the power supply voltage of a single lithium battery to meet the working voltage of the lithium battery forklift, and there is no requirement for the power supply voltage of a single lithium battery. Therefore, the single-body weight and volume of the forklift lithium battery 1 can be further reduced, facilitating the replacement of the lithium battery by an operator alone without the aid of external tools.

[0025] As Figure 5 shown, in one embodiment, the battery box includes an upper box body 141 and a lower box body 142, and the upper box body 141 and the lower box body 142 are connected by long screws 15. Such a connection facilitates the subsequent inspection and maintenance of the lithium battery.

[0026] The first electrical connector 11 is located on the side of the battery box opposite to the opening of the battery installation compartment on the forklift. A circuit and a plug-in end matching the first electrical connector 11 are pre-set on the vehicle frame 5 of the forklift. Thus, when the lithium battery is loaded from the opening of the battery installation compartment, the connection between the first electrical connector 11 and the plug-in end can be completed while the battery box is installed in place, realizing the circuit connection of the battery box; when the lithium battery is removed from the battery installation compartment

[0027] While disconnecting the connection between the first electrical connector 11 and the plug end when taking it out of the opening, there is no need to perform additional disassembly and assembly operations for the circuit connection when disassembling, assembling, and replacing the lithium battery, and the assembly efficiency is high. The first electrical connector 11 is a male or female head, and the corresponding plug end is a female / male head that matches it. For example, if the male head is provided on the battery box, a female head that matches the male head is provided at the position corresponding to the installation of the lithium battery on the forklift; similarly, a female head can also be provided on the battery box, and a male head that matches the female head is provided at the position corresponding to the installation of the lithium battery on the forklift.

[0028] The battery box is provided with a positioning member, and the installation position of the lithium battery is positioned by the cooperation of the positioning member and the corresponding structure on the vehicle frame 5, which is convenient for aligning the first electrical connector 11 on the lithium battery. Preferably, the positioning member and the first electrical connector 11 are located on the same side of the battery box.

[0029] Preferably, a handle 17 is provided on the upper part of the battery box, which is convenient for the operator to disassemble and assemble the lithium battery from the forklift and perform rapid replacement of the lithium battery.

[0030] An embodiment of the present application provides a lithium battery system for supplying power to a lithium battery forklift. As Figure 3 shown, the lithium battery system includes a battery tray 2, a battery management control box, and one or more forklift lithium batteries 1 as described in the previous embodiment.

[0031] As Figures 7-8 shown, the battery tray 2 is installed on the forklift support. The battery tray 2 is used to install the lithium battery and can be regarded as a part of the forklift support in some embodiments. A group and more than one group of battery modules are divided on the battery tray 2. Each battery module includes more than one battery installation position 21, and a second electrical connector 22 that matches the first electrical connector 11 of the lithium battery is provided in each battery installation position 21. As Figure 8As shown, the second plug-in connector in the same battery module is connected in series to the battery management control box. Thus, after the lithium battery is installed in the battery installation position 21 and the first electrical plug-in connector 11 and the second electrical plug-in connector 22 are connected, the access of the lithium battery can be realized, and the series connection of multiple lithium batteries in the same battery module can be completed. It should be noted that the number of battery installation positions 21 provided in a battery module is determined according to the working voltage of the forklift and the power supply voltage of a single lithium battery. For example, in a specific embodiment, the power supply voltage of a single lithium battery is 24V and the working voltage of the forklift is 80V, then three battery installation positions 21 are required in a battery module, and the working voltage requirement of the forklift can be met by connecting three lithium batteries in series. Multiple battery modules are connected in parallel to the battery management control box to achieve power capacity expansion. For example, when all the lithium batteries are installed in place, if the battery capacity of a group of battery modules is 100Ah, then the battery capacity provided by two groups of battery modules connected in parallel can be 200Ah. And when more than one group of battery modules is provided, the number of groups of battery modules connected to the lithium battery can be selected according to the requirements for different battery capacities of the forklift in different application scenarios. For example, two groups of battery modules are provided on the battery pallet 2. In one application scenario, lithium batteries can be installed only in the battery installation positions 21 of one of the battery modules, and the battery installation positions 21 in the other battery module are left empty without installing lithium batteries; in another application scenario, the required number of lithium batteries are installed in the battery installation positions 21 of both battery modules to provide a larger battery capacity.

[0032] Preferably, in order to facilitate the installation of the lithium battery on the battery installation position 21, a positioning hole 23 matching the positioning member on the lithium battery is provided on the battery installation position 21. In this embodiment, as Figure 4 shown, the positioning member and the first electrical plug-in connector 11 are located at the bottom of the battery box. The positioning members on the battery box include a first positioning member 12 and a second positioning member 13 that differ in at least one of size and / or shape. The first positioning member 12 and the second positioning member 13 are located on opposite sides of the bottom of the battery box. Such a setting can determine the installation direction of the lithium battery through the difference between the first positioning member 12 and the second positioning member 13. Only when the installation direction is correct, the first positioning member 12 and the second positioning member 13 can be inserted into the corresponding positioning holes 23, and the connection between the first electrical plug-in and the second electrical plug-in connector 22 can be realized after the lithium battery is installed in place. If the lithium battery is not installed in the correct direction, the lithium battery cannot be installed in place because the positioning member does not match the positioning hole 23. Thus, according to the above structure, on the one hand, the cooperation between the positioning member and the positioning hole 23 can realize the connection between the lithium battery and the battery pallet 2, and on the other hand, it can also play the role of identifying the installation direction of the lithium battery. Preferably, the first positioning member 12

[0033] The first positioning member 12 and the second positioning member 13 are connecting columns. The lithium battery is connected to the battery tray 2 by inserting the connecting columns into the positioning holes 23, and the cooperation between the positioning members and the positioning holes 23 can prevent the installation position of the lithium battery from shifting during the forklift operation. Further, the radial dimension of the connecting column is gradually increased from bottom to top, which facilitates the insertion of the connecting column into the corresponding positioning hole 23 during the process of loading the lithium battery from top to bottom.

[0034] As Figure 8 shown, the battery tray 2 is also used to install the battery management control box, which is installed at the bottom of the battery tray 2 from below. The connecting wires of the second electrical connector 22 are routed from the bottom of the battery tray 2 and connected to the battery management control box. The electrical components of the battery management control box are the same as those described in the electrical box in CN118026056A, and will not be elaborated here.

[0035] As Figure 8 shown, the lithium battery system in this embodiment includes two groups of battery modules, and each battery module includes three forklift lithium batteries 1. As Figures 1-3 shown, after the lithium battery system is installed in place on the vehicle frame 5, a limit is provided from above the lithium battery by the upper pressure plate 52. The upper pressure plate 52 is located above the lithium battery, and the front and rear ends of the upper pressure plate 52 are fixed to the vehicle frame 5. As Figure 2 shown, in this embodiment, a rear support plate 54 extends upward at the rear side of the battery tray 2, and a front support plate 53 is provided at the front side of the battery tray 2. One end of the upper pressure plate 52 is inserted and cooperatively connected with one of the front support plate 53 and the rear support plate 54, and the other end of the upper pressure plate 52 is fixed to the other one of the front support plate 53 and the rear support plate 54 by a fastener 6. In this way, only one fastener 6 is required, which is convenient for operation.

[0036] As Figure 4 and 7 shown, a plurality of avoidance holes are provided on the battery tray 2, and the avoidance holes correspond to the long screw 15 connecting the upper box body 141 and the lower box body 142, preventing the protruding structure of the long screw 15 from hindering the battery box from being installed in place.

[0037] Since the present utility model adopts the above solution, it is not necessary for the power supply voltage of a single lithium battery to meet the working voltage of the lithium battery forklift, and there is no requirement for the power supply voltage of a single lithium battery. Therefore, the single weight and volume of the forklift lithium battery 1 can be further reduced, facilitating the replacement of the lithium battery by an operator alone without external tools. And because the weight of a single lithium battery is reduced, when it is used in the battery compartment 51 with an upper opening, the replacement of the lithium battery can also be easily achieved.

[0038] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lithium battery forklift, comprising a frame, a battery compartment being provided on the frame, characterized in that: A lithium battery system is provided in the battery compartment, and the lithium battery system includes a battery tray, a battery management control box and one or more forklift lithium batteries; The power supply voltage of a single forklift lithium battery is lower than the working voltage of the forklift, and a first electrical connector is provided on the forklift lithium battery; The battery tray is installed on the forklift bracket, and one or more battery modules are divided on the battery tray. Each battery module includes more than one battery installation position, and one battery installation position is used to install a forklift lithium battery. Each battery installation position is provided with a second electrical connector that matches the first electrical connector of the lithium battery. The second connector in the same battery module is connected in series to the battery management control box, and adjacent battery modules are connected in parallel to the battery management control box. The one or more forklift lithium batteries are installed in the battery installation position, and the first electrical connector is plugged into and matched with the second electrical connector.

2. A lithium battery forklift according to claim 1, characterized in that: It includes an upper pressing plate, which is located above the forklift lithium battery in the battery compartment and provides an upper limit for the forklift lithium battery.

3. A lithium battery forklift according to claim 2, characterized in that: A rear support plate is extended upward from the rear side of the battery tray, a front support plate is provided on the front side of the battery tray, one end of the upper pressure plate is plug-fittedly connected to one of the front support plate and the rear support plate, and the other end of the upper pressure plate is fixed to the other of the front support plate and the rear support plate by fasteners.

4. A lithium battery forklift according to claim 1, characterized in that: A positioning piece is provided on the lithium battery, and the positioning piece and the first electrical connector are located at the bottom of the lithium battery; a positioning hole matching the positioning piece is provided on the battery installation position.

5. A lithium battery forklift according to claim 4, characterized in that: The positioning members on the battery box include a first positioning member and a second positioning member that are different in at least one of size and / or shape. The first positioning member and the second positioning member are located on opposite sides of the bottom of the battery box.

6. A lithium battery forklift according to claim 4 or 5, characterized in that: The positioning member is a connecting column, and the radial dimension of the connecting column gradually increases from bottom to top.

7. A lithium battery forklift according to claim 1, characterized in that: The battery management control box is installed at the bottom of the battery tray; The connection line of the second electrical connector is routed from the bottom of the battery support plate and connected to the battery management control box.

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