Forklift lithium battery, lithium battery system and charging station

Abstract

The utility model relates to a forklift lithium battery which comprises a battery box, a plurality of battery cells connected in series are arranged in the battery box, and the power supply voltage of a single battery box is smaller than the working voltage of a lithium battery forklift powered by the lithium battery; the utility model further relates to a lithium battery system which comprises a battery supporting plate, a battery management control box and more than one battery module divided on the forklift lithium battery supporting plate, and each battery module comprises more than one battery mounting position. A second electric plug connector matched with the first electric plug connector of the lithium battery is arranged in each battery mounting position, and the second plug connectors in the same battery module are connected in series to the battery management control box. According to the scheme, the monomer weight and the volume of the lithium battery of the forklift can be further reduced, and the lithium battery can be conveniently replaced by a single operator without an external tool.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift lithium batteries, in particular to a forklift lithium battery, a lithium battery system and a charging station. Background Art

[0002] Due to the fast charging characteristic of lithium battery forklifts, the need for long endurance can be met by replenishing power during the use interval. However, there are the following deficiencies:

[0003] The charging process requires a certain amount of 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 set up, charging and power replenishment are impossible. The standard capacity batteries in existing lithium battery forklifts themselves have a large volume and weight. In the scenario of replacing the battery, without the aid of handling tools, it is impossible to move the lithium battery by manpower alone.

[0004] In response to the above problems, the Chinese patent application with the publication number CN118026056A submitted by the applicant earlier provided a solution, which proposed to use multiple quickly replaceable batteries to supply power to the forklift, and the multiple quickly replaceable batteries are respectively connected to the electrical box. The above solution has the following deficiencies: The multiple quickly replaceable batteries are connected in parallel to the electrical box. That is to say, a single quickly replaceable 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 quickly replaceable batteries, 80V quickly replaceable batteries need to be used. In order to meet this power supply voltage requirement, the weight of a single quickly replaceable battery is still relatively large, which is not suitable for a battery compartment with an open top. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the utility model is to provide a forklift lithium battery, a lithium battery system and a charging station.

[0006] One object of the present application is to provide a forklift lithium battery, including a battery box, in which a plurality of battery cores connected in series are arranged. 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; a first electrical connector exposed outward is arranged on the battery box, and the first electrical connector is electrically connected to the battery core.

[0007] Another object of the present application is to provide a lithium battery system, including a battery pallet, a battery management control box, and more than one forklift lithium battery as described above; the battery pallet is installed on the forklift bracket, and one set and more than one set of battery modules are divided on the battery pallet. Each battery module includes more than one battery installation position, and 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; different battery modules are connected in parallel to the battery management control box; the forklift lithium battery is installed in the battery installation position, and after all the battery installation positions in one battery module are filled with lithium battery forklifts, the power supply voltage output by the battery module meets the working voltage requirements of the lithium battery forklift.

[0008] Another object of the present application is to provide a charging station for charging the above-mentioned forklift lithium battery. Multiple battery charging positions are set in the charging station, and each charging position is respectively provided with a charging circuit. The charging circuits of each charging position are connected in parallel, and a third electrical connector matching the first electrical connector on the forklift lithium battery is provided on each battery charging position.

[0009] Due to the adoption of the above solution in the present application, 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 can be further reduced, which is convenient for the operator to replace the lithium battery alone without the help of external tools. And it can cooperate with the battery pallet, and the multiple forklift lithium batteries in a single battery module are connected in series to meet the working voltage of the vehicle, and the battery capacity can be expanded through multiple battery modules. And the above-mentioned charging station can charge multiple forklift lithium batteries in batches, improving the charging efficiency.

[0010] The working voltage of the vehicle, and the battery capacity is expanded through multiple battery modules. And the above-mentioned charging station can charge multiple forklift lithium batteries in batches, improving the charging efficiency. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the forklift lithium battery in the present application;

[0012] Figure 2 It is an exploded view of the forklift lithium battery in the present application;

[0013] Figure 3 It is a schematic structural diagram of the lithium battery system in the present application;

[0014] Figure 4 It is a schematic structural diagram of the battery bracket and the battery management control box;

[0015] Figure 5 It is Figure 3 A schematic structural diagram from another angle;

[0016] Figure 6 It is a schematic structural diagram of the charging station in this embodiment.

[0017] Reference numerals:

[0018] Forklift lithium battery 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 cell 16, handle 17;

[0019] Battery tray 2, battery installation position 21, second electrical connector 22, positioning hole 23;

[0020] Battery management control box 3,

[0021] Charging station 4, third electrical connector 41. Detailed implementation manners

[0022] The embodiments of the present utility model will be described in detail below.

[0023] An embodiment of the present application provides a forklift lithium battery 1, as Figure 1 and 2 shown, which includes a battery box. A plurality of mutually connected-in-series battery cells 16 are arranged in the battery box. A first electrical connector 11 exposed outward is arranged on the battery box. The first electrical connector 11 is electrically connected to the battery cells 16. The first electrical connector 11 may 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 a lithium battery forklift powered by this lithium battery. When installed on a 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. The first electrical connectors 11 on adjacent battery boxes are connected through electrical connection wires to realize the electrical connection between the lithium batteries.

[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, which is convenient for an operator to replace the lithium battery alone without the aid of external tools.

[0025] As Figure 2 shown, in one embodiment, the battery box includes an upper box body 141 and a lower box body 142. The upper box body 141 and the lower box body 142 are connected by a long screw 15. Such a connection facilitates 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 forklift frame. 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 electrical connection of the battery box; when the lithium battery is taken out from the opening of the battery installation compartment, the connection between the first electrical connector 11 and the plug-in end is disconnected. When disassembling, installing, and replacing the lithium battery, there is no need to perform additional disassembly and assembly operations for the electrical connection, and the assembly efficiency is high. The first electrical connector 11 is a male or female head, and the corresponding plug-in end is a female / male head matching it. For example, if the connector on the battery box is a male head, a female head matching the male head is set at the position corresponding to the installation of the lithium battery on the forklift; similarly, it can also be that a female head is set on the battery box, and a male head matching the female head is set at the position corresponding to the installation of the lithium battery on the forklift.

[0027] The battery box is provided with a positioning member. The installation position of the lithium battery is positioned by the cooperation of the positioning member and the corresponding structure on the frame, facilitating the alignment of 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.

[0028] Preferably, a handle 17 is provided on the upper part of the battery box, facilitating the operator to disassemble and assemble the lithium battery from the forklift and perform rapid replacement of the lithium battery.

[0029] An embodiment of the present application provides a lithium battery system for supplying power to a lithium battery forklift. As

[0030] shown, the lithium battery system includes a battery tray 2, a battery management control box 3, and more than one forklift lithium battery 1 as described in the previous embodiment. Figure 3 As

[0031] 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. A second electrical connector 22 matching the first electrical connector 11 of the lithium battery is provided in each battery installation position 21. As Figures 4-5 shown, Figure 5As shown in the figure, the second plug-in connector in the same battery module is connected in series to the battery management control box 3. 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 need to be included 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 3 to achieve power expansion. For example, when all the lithium batteries are installed in place, the battery capacity of a group of battery modules is 100Ah, then the battery capacity provided by two groups of parallel battery modules 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, there are two groups of battery modules 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 of 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 1 and 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 with at least one difference in size and / or shape. Correspondingly, the shapes and sizes of the positioning holes 23 also vary. With such a setting, the installation direction of the lithium battery can be determined through the differences 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 of 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 and the second positioning member 13 are connecting columns. By inserting the connecting columns into the positioning holes 23, the connection of the lithium battery on the battery pallet 2 can be realized, and the positioning

[0033] The part is matched with the positioning hole 23 to prevent the installation position of the lithium battery from shifting during the forklift driving process. Further, the radial dimension of the connecting column is gradually increased from bottom to top, which is convenient for the connecting column to be inserted into the corresponding positioning hole 23 during the process of loading the lithium battery from top to bottom.

[0034] As Figure 5 As shown in the figure, the battery tray 2 is also used to install the battery management control box 3, and the battery management control box 3 is installed at the bottom of the battery tray 2 from below. The connecting wire of the second electrical connector 22 is routed from the bottom of the battery tray 2 and connected to the battery management control box 3. The electrical components of the battery management control box 3 are the same as those of the electrical box in CN118026056A, and will not be elaborated here.

[0035] As Figure 6 As shown in the figure, this embodiment also provides a charging station 4. Multiple battery charging positions are set in the charging station 4, and each charging position is provided with a charging circuit. The charging circuits of each charging position are connected in parallel. Each battery charging position is provided with a third electrical connector 41 that matches the first electrical connector 11 on the forklift lithium battery 1. By plugging and connecting the first electrical connector 11 and the third electrical connector 41, the charging circuit of the forklift lithium battery 1 can be conducted to charge the forklift lithium battery 1, and by disconnecting the first electrical connector 11 and the third electrical connector 41, the charging of the forklift lithium battery 1 can be disconnected. Thus, multiple forklift lithium batteries 1 can be charged simultaneously through the charging station 4, improving the charging efficiency. And through the plugging and matching method of the first electrical connector 11 and the third electrical connector 41, the forklift lithium battery 1 can be placed in place at the battery charging position, and the charging circuit is simple and the connection is convenient. Correspondingly, each battery charging position is provided with a positioning hole 23 that matches the positioning part on the lithium battery, and the specific settings of the positioning part and the positioning hole 23 are the same as those in the previous embodiment.

[0036] Since the present utility model adopts the above scheme, 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, which is convenient for the operator to replace the lithium battery alone without external tools. And because the weight of a single lithium battery is reduced, when it is used in a battery compartment with an opening at the top, the replacement of the lithium battery can also be easily carried out.

[0037] Although the embodiments of the present utility model 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 purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A forklift lithium battery, comprising a battery box, wherein a plurality of battery cells are connected in series, characterized in that: The power supply voltage of a single battery box is lower than the working voltage of a lithium battery forklift powered by the lithium battery; the battery box is provided with a first electrical connector exposed outwardly, and the first electrical connector is electrically connected to the battery core.

2. The forklift lithium battery 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 on the same side of the lithium battery box.

3. The forklift lithium battery according to claim 2, 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, and the first positioning member and the second positioning member are located on opposite sides.

4. The forklift lithium battery according to claim 2, characterized in that: The positioning member and the first electrical connector are located at the bottom of the lithium battery box.

5. The forklift lithium battery according to claim 1, characterized in that: A handle is provided on the upper portion of the battery box.

6. A lithium battery system, characterized in that: It comprises a battery tray, a battery management control box and one or more forklift lithium batteries as described in any one of claims 1 to 5; 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 mounting position. Each battery mounting 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; different battery modules are connected in parallel to the battery management control box; the forklift lithium battery is installed in the battery mounting position, and after all the battery mounting positions in a battery module are installed with a lithium battery forklift, the power supply voltage output by the battery module meets the working voltage requirement of the lithium battery forklift.

7. A lithium battery system according to claim 6, characterized in that: The battery installation position is provided with positioning holes which correspond to the positioning pieces one by one and match in shape.

8. A lithium battery system according to claim 6, characterized in that: The battery management control box is installed at the bottom of the battery tray; the connecting line of the second electrical connector is routed from the bottom of the battery tray and connected to the battery management control box.

9. A charging station for charging a forklift lithium battery as claimed in any one of claims 1 to 5, characterized in that: A plurality of battery charging positions are arranged in the charging station, each charging position is provided with a charging circuit, the charging circuits of each charging position are arranged in parallel, and each battery charging position is provided with a third electrical connector matching the first electrical connector on the forklift lithium battery.

10. A charging station according to claim 9, characterized in that: Each battery charging position is provided with a positioning hole corresponding to the positioning piece on the forklift lithium battery.

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