Battery charging device

Abstract

The invention discloses a battery charging device which comprises a base, a mounting rack, a positive terminal, a negative terminal and a power supply module, the mounting rack is connected to the base to form a battery mounting space for mounting a battery to be charged, and the positive terminal and the negative terminal are connected to the mounting rack and can be connected to the positive electrode and the negative electrode of the battery to be charged respectively. The power supply module supplies power to the positive terminal and the negative terminal, so that current can be supplied into the battery to charge the battery, and through the arrangement of the battery charging device, the power supply module can be conveniently connected with the tab-free battery, so that the tab-free battery is conveniently charged, and the charging difficulty of the tab-free battery is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging, and particularly relates to a battery charging device. Background Art

[0002] With the rapid development of the new energy vehicle industry, power battery technology is constantly innovating to meet the market's demands for high energy density, high power output, and high safety performance.

[0003] In traditional batteries, the electrodes usually adopt the tab design, that is, the input and output of current are realized through a concentrated metal lead-out end (tab). Due to the defects of this design, such as high internal resistance, uneven heat dissipation, and insufficient mechanical reliability, with the further development of battery technology, the tabless electrode technology has emerged. The tabless electrode technology eliminates the centralized tab structure of the battery, enabling the entire surface of the electrode plate to uniformly participate in the output and input of current, thereby significantly reducing the internal resistance of the battery and improving the thermal management performance and current distribution uniformity of the battery.

[0004] However, since the battery lacks the tab structure, it is difficult to connect with the cable of the charging device, and thus it cannot be charged through the traditional charging device, resulting in difficult charging of the tabless battery. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a battery charging device to solve the technical problem of difficult charging of tabless batteries in the prior art.

[0006] To achieve the above technical purpose, the present invention adopts the following technical solutions: The present invention provides a battery charging device, including: A base; A mounting rack, including a positive electrode rack body and a negative electrode rack body, the positive electrode rack body and the negative electrode rack body are connected to the base, and a battery installation space is formed between the positive electrode rack body and the negative electrode rack body, and the battery installation space is for installing the battery to be charged; A positive terminal, connected to the mounting rack, for connecting the positive electrode of the battery to be charged; A negative terminal, connected to the mounting rack, for connecting the negative electrode of the battery to be charged; and A power supply module, connected to the positive terminal and the negative terminal, for charging the battery to be charged through the positive terminal and the negative terminal.

[0007] In some embodiments, the positive terminal and the negative terminal can respectively slidably connect to the positive electrode and the negative electrode of the battery to be charged through the positive electrode rack body and / or the negative electrode rack body.

[0008] In some embodiments, the positive terminal is slidably connected to the positive electrode frame body, and the sliding direction intersects with the sliding direction of the positive electrode frame body, and the negative terminal is slidably connected to the negative electrode frame body, and the sliding direction intersects with the sliding direction of the negative electrode frame body.

[0009] In some embodiments, the positive electrode frame body and / or the negative electrode frame body are provided with mounting walls, the positive terminal and / or the negative terminal include connecting members and wiring members, the connecting members are connected to the mounting walls and are used for connecting the battery to be charged, and the wiring members are connected to the connecting members and are used for wiring the power supply module.

[0010] In some embodiments, the positive terminal and / or the negative terminal further include two limiting plates, and the two limiting plates are respectively fixed to the connecting member and the wiring member and are respectively located on both sides of the mounting wall.

[0011] In some embodiments, the two limiting plates are slidably connected to the mounting wall along the height direction of the base, and the battery charging device further includes a plurality of locking members, and the locking members connect the two limiting plates to limit the sliding of the limiting plates relative to the mounting wall.

[0012] In some embodiments, the wiring member is slidably connected to the connecting member, and by sliding along the wiring member, the two limiting plates can be brought closer.

[0013] In some embodiments, the connecting member includes a supply sleeve, a sliding column, a terminal head and a spring, the supply sleeve is connected to the mounting wall, the sliding column is slidably connected to the supply sleeve, the terminal head is fixed to the sliding column and is used for connecting the battery to be charged, and the spring is sleeved on the sliding column and abuts against the terminal head.

[0014] In some embodiments, the battery charging device further includes a driving module, and the driving module is connected to the positive electrode frame body or the negative electrode frame body and is used for driving the positive electrode frame body or the negative electrode frame body to slide.

[0015] In some embodiments, the power supply module includes a power supply, a positive electrode wiring stud and a negative electrode wiring stud, the positive electrode wiring stud and the negative electrode wiring stud are fixed to the mounting rack and are respectively connected to the positive terminal and the negative terminal, and the power supply is connected to the positive electrode wiring stud and the negative electrode wiring stud.

[0016] Compared with the prior art, the battery charging device provided by the present invention is provided with a base, a mounting rack, a positive terminal, a negative terminal and a power supply module. The mounting rack includes a positive electrode frame body and a negative electrode frame body. The positive electrode frame body and the negative electrode frame body are both connected to the base and form a battery mounting space for mounting the battery to be charged. The positive terminal and the negative terminal are connected to the mounting rack and can be respectively connected to the positive and negative electrodes of the earless battery to be charged. By supplying power to the positive terminal and the negative terminal through the power supply module, current can be supplied into the earless battery to achieve charging of the earless battery. Through the setting of the battery charging device, it is convenient to connect the power supply module to the earless battery, thereby facilitating charging of the earless battery and reducing the charging difficulty of the earless battery. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the battery charging device provided by the embodiment of the present invention; Figure 2 is a schematic structural diagram of the battery charging device provided by the embodiment of the present invention from another angle.

[0018] Reference numerals in the drawings: 10 - Base 20 - Mounting rack 21 - Positive electrode frame body 22 - Negative electrode frame body 30 - Positive terminal 31 - Connecting piece 32 - Wiring piece 33 - Limiting plate 40 - Negative terminal 51 - Positive electrode wiring stud 52 - Negative electrode wiring stud 60 - Locking piece 70 - Driving module 71 - Handle 72 - Connecting rod 73 - Sliding rod 211 - Mounting wall 311 - Sliding sleeve 312 - End head 313 - Spring 314 - Thimble 10a - Battery 20a - Battery mounting space. Detailed Embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In order to solve the technical problem of difficult charging of earless batteries in the prior art, the present invention provides a battery charging device that can be conveniently connected to an earless battery for charging the earless battery.

[0021] It should be noted that the battery charging device described in the present invention is used for, but not limited to, charging earless blade batteries. For the convenience of description, in the present invention, only the case where the battery charging device is applied to the charging of earless blade batteries is taken as an example for description. The principle of the battery charging device applied to the charging of other types of batteries is essentially the same as that applied to the charging of earless blade batteries, and will not be elaborated here one by one.

[0022] The battery charging device provided by an embodiment of the present invention, as Figure 1-2 shown, includes a base 10, a mounting frame 20, a positive terminal 30, a negative terminal 40, and a power supply module (not marked in the figure). The mounting frame 20 is connected to the base 10 and forms a battery installation space 20a for installing the battery 10a to be charged; the positive terminal 30 is connected to the mounting frame 20 and is used to connect the positive electrode of the battery 10a to be charged; the negative terminal 40 is connected to the mounting frame 20 and is used to connect the negative electrode of the battery 10a to be charged; the power supply module is connected to the positive terminal 30 and the negative terminal 40 and is used to charge the battery 10a to be charged through the positive terminal 30 and the negative terminal 40.

[0023] Specifically, the battery charging device is provided with a base 10, a mounting frame 20, a positive terminal 30, a negative terminal 40, and a power supply module. The mounting frame 20 is connected to the base 10 to form a battery installation space 20a for installing the battery 10a to be charged. The positive terminal 30 and the negative terminal 40 are connected to the mounting frame 20 and can be respectively connected to the positive and negative electrodes of the earless battery 10a to be charged. The power supply module supplies power to the positive terminal 30 and the negative terminal 40, and then can supply current into the earless battery 10a to realize the charging of the battery 10a. Through the above settings of the battery charging device, it is convenient for the power supply module to be connected to the earless battery, thus facilitating the charging of the earless battery and reducing the charging difficulty of the earless battery.

[0024] In this embodiment, the base 10 is the basic structure of the whole device, which is used to carry the battery 10a and other components and provide stable support. The base plate is made of high-strength aluminum alloy to ensure the strength of the structure.

[0025] In this embodiment, the positive terminal 30 and the negative terminal 40 are in reliable contact with the positive and negative electrodes of the earless battery respectively through contact, so as to ensure the efficient transmission of current to the earless battery 10a.

[0026] It can be understood that the mounting frame 20 can be any frame structure that can form a battery installation space 20a for installing the battery 10a to be charged, and only needs to be able to stabilize the battery 10a to be charged during the charging process.

[0027] In one of the embodiments, in order to improve the fault tolerance of the mounting frame 20 and adapt to the installation of more models and sizes of batteries 10a, asFigure 1-2 As shown, the mounting bracket 20 includes a positive electrode bracket 21 and a negative electrode bracket 22 opposite to the positive electrode bracket 21, and a battery mounting space 20a is formed between the positive electrode bracket 21 and the negative electrode bracket 22.

[0028] In one embodiment, the positive electrode bracket 21 and / or the negative electrode bracket 22 are slidably connected to the base 10 along the length direction of the base 10. The positive terminal 30 and the negative terminal 40 are respectively connected to the positive electrode bracket 21 and the negative electrode bracket 22, and the positive terminal 30 and the negative terminal 40 can respectively slide through the positive electrode bracket 21 and / or the negative electrode bracket 22 to connect to the positive and negative electrodes of the battery to be charged. Specifically, by providing the positive electrode bracket 21 and the opposite negative electrode bracket 22, and sliding the positive electrode bracket 21 and / or the negative electrode bracket 22 along the length direction of the base 10, the size of the battery mounting space 20a can be adjusted, so as to be able to accommodate the installation of batteries 10a of different sizes. The positive terminal 30 and the negative terminal 40 are connected to the positive electrode bracket 21 and the negative electrode bracket 22, and thus the connection to the positive and negative electrodes of the battery 10a can be realized.

[0029] It can be understood that the positive electrode bracket 21 and the negative electrode bracket 22 can be simultaneously slidably connected to the base 10. By simultaneously sliding the positive electrode bracket 21 and the negative electrode bracket 22, the adjustment of the battery mounting space 20a can be realized; or only one of the positive electrode bracket 21 or the negative electrode bracket 22 can be slidably connected to the base 10, and by sliding the positive electrode bracket 21 or the negative electrode bracket 22, the battery mounting space 20a can be adjusted.

[0030] In this embodiment, as Figure 1-2 shown, both the positive electrode bracket 21 and the negative electrode bracket 22 are slidably connected to the base 10, which can enable both the positive terminal 30 and the negative terminal 40 to slide through the positive electrode bracket 21 and the negative electrode bracket 22 to dock with the positive and negative electrodes of the battery 10a. Therefore, during the installation of the battery 10a, it is only necessary to place the battery 10a in place within the battery mounting space 20a, without docking the positive and negative electrodes of the battery 10a with the positive terminal 30 and the negative terminal 40 during the installation. While facilitating the installation of the battery 10a, it can avoid damage to the structure of the battery 10a and the structures of the positive terminal 30 and the negative terminal 40 during the installation process of the battery 10a.

[0031] In one embodiment, as Figure 1-2 shown, the positive terminal 30 is slidably connected to the positive electrode bracket 21 along the height direction of the base 10, and the negative terminal 40 is slidably connected to the negative electrode bracket 22 along the height direction of the base 10.

[0032] Specifically, by sliding the positive terminal 30 and the negative terminal 40 along the height direction of the base 10, the heights of the positive terminal 30 and the negative terminal 40 can be adjusted, facilitating the connection of the positive terminal 30 and the negative terminal 40 to the positive and negative electrodes of the battery 10a.

[0033] In this embodiment, during the docking process of the positive terminal 30 and the negative terminal 40 with the battery 10a to be charged, the positive electrode frame 21 and the negative electrode frame 22 first slide towards the direction of the battery 10a. When the positive terminal 30 and the negative terminal 40 are respectively close to the positive and negative electrodes of the battery 10a, then slide the positive terminal 30 or / and the negative terminal 40 longitudinally as required, so that the positive terminal 30 and the negative terminal 40 are respectively opposite to the positive and negative electrodes of the battery 10a. Then further slide the positive electrode frame 21 and the negative electrode frame 22, and the positive terminal 30 and the negative terminal 40 can be respectively docked to the positive and negative electrodes of the battery 10a, facilitating the docking of the positive terminal 30 and the negative terminal 40 with the positive and negative electrodes of the battery 10a and reducing the charging difficulty of the earless battery.

[0034] It can be understood that the positive electrode frame 21 and / or the negative electrode frame 22 can be provided with sliding structures such as sliding rods and sliding grooves extending along the height direction of the base 10 for the positive electrode frame 21 and the negative electrode frame 22 to slide. The positive terminal 30 and the negative terminal 40 can be any terminal structures capable of connecting cables.

[0035] In one embodiment, as Figure 1-2 shown, the positive electrode frame 21 and / or the negative electrode frame 22 is provided with a mounting wall 211. The positive terminal 30 and / or the negative terminal 40 includes a connecting member 31 and a wiring member 32. The connecting member 31 is connected to the mounting wall 211 for connecting the battery 10a to be charged, and the wiring member 32 is connected to the connecting member 31 for wiring the power supply module. Specifically, the mounting wall 211 can be connected to the positive electrode frame 21 and / or the negative electrode frame 22. The connecting member 31 can connect the battery 10a, and the wiring member 32 can be used for the cable wiring of the power supply module to achieve stable transmission of current to the battery 10a.

[0036] In this embodiment, as Figure 1-2 shown, the mounting wall 211 is provided with a sliding hole extending longitudinally. The connecting member 31 passes through the sliding hole and is slidably connected to the mounting wall 211.

[0037] In this embodiment, as Figure 1-2 shown, both the positive electrode frame 21 and the negative electrode frame 22 are provided with a mounting wall 211. Both the positive terminal 30 and the negative terminal 40 are provided with a connecting member 31 and a wiring member 32. The positive terminal 30 and the negative terminal 40 are slidably connected to the mounting wall 211 through the connecting member 31 and are connected to the power supply module through the wiring member 32.

[0038] In one embodiment, asFigure 1-2 As shown, the positive terminal 30 and / or the negative terminal 40 further include two limiting plates 33, and the two limiting plates 33 are respectively fixed to the connecting member 31 and the wiring member 32 and are respectively located on both sides of the mounting wall 211. Specifically, the two limiting plates 33 are respectively located on both sides of the mounting wall 211 and can always be parallel to the mounting wall 211, so as to be able to provide limits for the connecting member 31 and the wiring member 32 and improve the stability of the positive terminal 30 and the negative terminal 40.

[0039] In one embodiment, as Figure 1-2 shown, the two limiting plates 33 are slidably connected to the mounting wall 211 along the height direction of the base 10, and the battery charging device further includes a plurality of locking members 60. The locking members 60 connect the two limiting plates 33 to limit the sliding of the limiting plates 33 relative to the mounting wall 211. Specifically, the two limiting plates 33 can improve the stability of the positive terminal 30 and the negative terminal 40 during the sliding process through the sliding connection along the mounting wall 211. The locking members 60 can make the limiting plates 33 closely fit the mounting wall 211 by connecting the two limiting plates 33, so as to limit the sliding of the limiting plates 33 relative to the mounting wall 211 and realize the locking of the positive terminal 30 and the negative terminal 40.

[0040] In one embodiment, the wiring member 32 is slidably connected to the connecting member 31, and the two limiting plates 33 can be brought closer by sliding along the wiring member 32. Specifically, by sliding the wiring member 32 connected to the connecting member 31, during the process of the locking member 60 locking the two limiting plates 33, the wiring member 32 can be driven to slide along the connecting member 31, so as to realize the mutual approach of the two limiting plates 33. Furthermore, the mutual approach of the limiting plates 33 can be realized without driving the limiting plates 33 to deform through the locking member 60, which provides convenience for the locking of the positive terminal 30 and the negative terminal 40.

[0041] In this embodiment, the locking member 60 includes a screw and a nut. The screw passes through the two limiting plates 33, and the nut is threadedly connected to the screw. During the tightening process of the nut, the wiring member 32 is driven to slide, and finally the limiting plates 33 approach each other and closely fit the mounting wall 211 to realize the locking of the positive terminal 30 and the negative terminal 40.

[0042] In one embodiment, as Figure 1-2As shown, the connecting member 31 includes a sleeve 311, a sliding column, an end 312, and a spring 313. The sleeve 311 is connected to the mounting wall 211. The sliding column is slidably connected to the sleeve 311. The end 312 is fixed to the sliding column and is used to connect the battery 10a to be charged. The spring 313 is sleeved on the sliding column and abuts against the end 312. Specifically, the sleeve 311 can achieve the connection with the mounting wall 211. The end 312 can be stably connected to the positive and negative electrodes of the battery 10a. By forming a driving force acting on the end 312, the spring 313 can ensure the stable connection between the end 312 and the positive and negative electrodes of the battery 10a, and ensure the stability and contact reliability of the battery 10a during the charging and discharging process.

[0043] In this embodiment, the wiring member 32 is slidably connected to the sleeve 311. The wiring member 32 and the sliding column realize the transfer of the current of the wiring member 32 to the sliding column through the sleeve 311.

[0044] In this embodiment, the spring 313 is made of high-strength stainless steel or alloy steel to ensure its high fatigue strength and anti-creep performance during long-term use.

[0045] In this embodiment, as Figure 1-2 shown, the connecting member 31 further includes a thimble 314. The thimble 314 is arranged at the front end of the end 312 and can transfer the clamping force of the spring 313 to the blade battery 10a to ensure that the battery 10a always maintains stable contact during the charging and discharging process. The head of the thimble 314 is designed in a cylindrical shape to reduce local pressure concentration and prevent damage to the surface of the battery 10a. The thimble 314 is made of high-strength alloy material and is subjected to surface hardening treatment to improve its wear resistance and impact resistance and avoid deformation or wear during long-term testing.

[0046] In one of the embodiments, as Figure 1-2 shown, the battery charging device further includes a driving module 70. The driving module 70 is connected to the positive electrode frame 21 or the negative electrode frame 22 and is used to drive the positive electrode frame 21 or the negative electrode frame 22 to slide. Specifically, by driving the positive electrode frame 21 or the negative electrode frame 22 to slide, the driving module 70 can facilitate the docking of the positive terminal 30 or the negative terminal 40 with the battery 10a.

[0047] In this embodiment, the driving module 70 is connected to the positive electrode frame 21 and can drive the positive electrode frame 21 to slide.

[0048] It can be understood that the driving module 70 can be any driving structure such as a motor, a cylinder, or a hydraulic cylinder that can drive the positive electrode frame 21 or the negative electrode frame 22 to slide.

[0049] In this embodiment, as Figure 1-2As shown, the driving module 70 includes a handle 71, a connecting rod 72, and a sliding rod 73. The handle 71 is hinged to the base 10. One end of the sliding rod 73 is slidably connected to the base 10 along the length direction of the base 10, and the other end is connected to the positive electrode frame 21. One end of the connecting rod 72 is hinged to the handle 71, and the other end is hinged to the sliding rod 73. When the handle 71 rotates, the sliding rod 73 can be driven to slide through the transmission of the connecting rod 72, so as to realize the driving of the positive electrode frame 21.

[0050] In one embodiment, as Figure 1-2 shown, the power supply module includes a power supply, a positive electrode connection stud 51, and a negative electrode connection stud 52. The positive electrode connection stud 51 and the negative electrode connection stud 52 are fixed to the mounting bracket 20 and are respectively connected to the positive terminal 30 and the negative terminal 40. The power supply is connected to the positive electrode connection stud 51 and the negative electrode connection stud 52. Specifically, the positive electrode connection stud 51 and the negative electrode connection stud 52 are connected to the positive terminal 30 and the negative terminal 40 through cables. The positive electrode connection stud 51 serves as a transfer structure and can adjust the magnitude of the current, so as to better match the charging of the battery 10a and avoid the concentrated heating of the battery 10a.

[0051] To better understand the present invention, the following Figures 1 to 2 is a detailed description of the technical solution of the present invention: During the charging process of the battery 10a, first connect the positive terminal 30 and the negative terminal 40 to the mounting wall 211, connect the positive electrode connection stud and the negative electrode connection stud to the positive and negative electrodes of the charging device respectively through nuts and screws, and connect the positive terminal 30 and the negative terminal 40 to the positive electrode connection stud and the negative electrode connection stud respectively through cables. Then place the blade battery 10a on the base 10. According to the specific size of the battery 10a, adjust the positions of the positive electrode frame 21, the negative electrode frame 22, the positive terminal 30, and the negative terminal 40, so that the positive terminal 30 and the negative terminal 40 are in close contact with the positive and negative electrodes of the battery 10a. Then lock the terminals, and then rotate the locking handle 71. The clamping force is transmitted to the connecting rod 72 through the lever principle to drive the positive electrode frame 21 to slide, further strengthening the connection between the battery 10a and the terminals, ensuring that the fixture secures the battery 10a. Finally, start the power supply, set the charging current and voltage, and start the charging process.

[0052] In a charging test of a 300Ah blade battery 10a using the charging device of the present invention, the battery 10a can be charged from 0% to 100% in only 2 hours. During the charging process, the temperature of the battery 10a remains below 45°C without any abnormal alarms. After ten cycles of charge and discharge tests, the results show that the blade battery charging device can effectively and stably carry out the charging process. During each charging process, the charging current of the battery 10a is stable, and no problems such as overheating, poor contact, or loosening of the battery 10a occur. After charging, the capacity of the battery 10a remains stable, the charging efficiency is high, and no damage or performance degradation of the battery 10a occurs. The test results prove that the present charging device can continuously maintain a stable clamping force, effectively ensure good contact between the battery 10a and the terminals, and improve the safety and reliability during the charging process of the battery 10a. In addition, the design of the charging device can be adapted to non-polar ear blade batteries 10a of different specifications, verifying its excellent applicability and durability.

[0053] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery charging device, characterized in that: include: Base; A mounting frame, comprising a positive electrode frame and a negative electrode frame, wherein the positive electrode frame and the negative electrode frame are connected to the base, and a battery mounting space is formed between the positive electrode frame and the negative electrode frame, wherein the battery mounting space is used to mount a battery to be charged; A positive terminal connected to the mounting frame and used for connecting to the positive electrode of the battery to be charged; A negative terminal connected to the mounting frame and used for connecting to the negative electrode of the battery to be charged; and A power supply module is connected to the positive terminal and the negative terminal, and is used to charge the battery to be charged through the positive terminal and the negative terminal.

2. The battery charging device according to claim 1, characterized in that: The positive electrode frame and / or the negative electrode frame are slidably connected to the base, and the positive terminal and the negative terminal can be respectively connected to the positive electrode and the negative electrode of the battery to be charged through the sliding of the positive electrode frame and / or the negative electrode frame.

3. The battery charging device according to claim 2, characterized in that: The positive electrode terminal is slidably connected to the positive electrode frame, and the sliding direction thereof intersects with the sliding direction of the positive electrode frame, and the negative electrode terminal is slidably connected to the negative electrode frame, and the sliding direction thereof intersects with the sliding direction of the negative electrode frame.

4. The battery charging device according to claim 2, characterized in that: The positive electrode frame and / or the negative electrode frame are provided with a mounting wall, and the positive terminal and / or the negative terminal include a connector and a wiring member, the connector is connected to the mounting wall for connecting the battery to be charged, and the wiring member is connected to the connector for wiring the power supply module.

5. The battery charging device according to claim 4, characterized in that: The positive terminal and / or the negative terminal further comprises two limiting plates, which are respectively fixed to the connecting member and the wiring member and are respectively located on both sides of the installation wall.

6. The battery charging device according to claim 5, characterized in that: The two limit plates are slidably connected to the installation wall along the base. The battery charging device also includes a plurality of locking members, which are connected to the two limit plates to limit the sliding of the limit plates relative to the installation wall.

7. The battery charging device according to claim 5, characterized in that: The connecting member is slidably connected to the connecting member, and the two limiting plates can be brought closer together by sliding along the connecting member.

8. The battery charging device according to claim 4, characterized in that: The connecting member includes a supply sleeve, a sliding column, an end and a spring. The supply sleeve is connected to the mounting wall. The sliding column is slidably connected to the supply sleeve. The end is fixed to the sliding column and is used to connect the battery to be charged. The spring is sleeved on the sliding column and abuts against the end.

9. The battery charging device according to claim 2, characterized in that: The battery charging device further comprises a driving module, which is connected to the positive electrode frame or the negative electrode frame and is used to drive the positive electrode frame or the negative electrode frame to slide.

10. The battery charging device according to any one of claims 1 to 9, characterized in that: The power supply module includes a power supply, a positive terminal stud and a negative terminal stud. The positive terminal stud and the negative terminal stud are fixed to the mounting frame and are respectively connected to the positive terminal and the negative terminal. The power supply is connected to the positive terminal stud and the negative terminal stud.

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