An electric vehicle modular lithium battery pack and method of use

Abstract

The application belongs to the technical field of lithium battery pack, and particularly relates to an electric car combined lithium battery pack and a use method thereof, which comprises a protective shell, a sealing cover arranged on the protective shell, a damping assembly arranged in the protective shell, a first battery body, a second battery body and a third battery body placed in the protective shell, a first fixing assembly sleeved on the first battery body, a second fixing assembly sleeved on the second battery body and a third fixing assembly sleeved on the third battery body. When the electric car is impacted, the force is transmitted to the fourth connecting rod through the sliding rod, and then transmitted to the sliding block through the fourth connecting rod. The sliding block extrudes the spring, and the elastic deformation of the spring absorbs the impact force, effectively reduces the influence of external impact on the battery body, prolongs the service life of the battery, and guarantees the stable operation of the battery under complex road conditions.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery pack technology, specifically referring to a combined lithium battery pack for electric vehicles and its usage method. Background Technology

[0002] In the two-wheeled vehicle sector, with increasing environmental awareness and demand for clean energy, lithium batteries are gradually becoming the main power source for two-wheeled vehicles due to their advantages such as high energy density, long lifespan, and zero pollution. However, current lithium battery packs for two-wheeled vehicles still have many problems in actual use.

[0003] On the one hand, the existing lithium battery packs are not perfect in terms of fixing methods. During vehicle operation, the batteries are prone to loosening and displacement due to vibration and bumps, which can cause the batteries to collide with each other. This not only affects the normal performance of the batteries, but may also cause safety hazards such as battery short circuits and fires, seriously threatening the life and property safety of users.

[0004] On the other hand, two-wheeled vehicles encounter various complex road conditions during operation and are inevitably subjected to external impacts and vibrations. Existing lithium battery packs lack effective shock absorption measures, and the impact force acts directly on the battery, which can easily damage the internal structure of the battery, shorten the battery life, and increase the cost of use.

[0005] Furthermore, lithium battery packs also present inconveniences in terms of assembly and maintenance. Some lithium battery packs have complex assembly structures that require the use of specialized tools for installation and disassembly, making daily maintenance and battery replacement difficult for users. At the same time, the electrical connection methods are not reliable enough, and problems such as poor contact can easily occur, affecting the power supply stability of the battery pack.

[0006] Moreover, lithium battery packs generate a lot of heat during operation. If heat cannot be dissipated in time, the battery temperature will be too high, affecting battery performance and lifespan. At the same time, the sealing performance of existing lithium battery packs needs to be improved, as they cannot effectively prevent dust, moisture and other contaminants from entering the battery pack and damaging the battery. Summary of the Invention

[0007] In view of the above situation, the present invention provides a combined lithium battery pack for electric vehicles.

[0008] The technical solution adopted by the present invention is as follows: The present invention provides a combined lithium battery pack for electric vehicles, including a protective shell and a sealing cover disposed on the protective shell. A shock-absorbing component is disposed inside the protective shell. A first battery body, a second battery body and a third battery body are placed inside the protective shell. A first fixing component is fitted on the first battery body, a second fixing component is fitted on the second battery body, and a third fixing component is fitted on the third battery body. The first fixing component and the second fixing component are detachably connected by a first connecting component, and the second fixing component and the third fixing component are detachably connected by a second connecting component.

[0009] Furthermore, the shock-absorbing component includes a slide groove, which is formed inside the wall of the protective shell. One end of a spring is fixedly connected to the inner wall end of the slide groove, and the other end of the spring is fixedly connected to a slider. The slider is slidably disposed in the slide groove. One end of the slider is hinged to one end of a fourth connecting rod, and the other end of the fourth connecting rod is hinged to the side wall of the vertical plate. A slide rod is fixedly connected to the side wall of the slide rod, and the slide rod is slidably sleeved on the side wall of the protective shell.

[0010] Furthermore, the first fixing component includes a first sleeve, which is fitted onto the upper end of the side wall of the first battery body, and a second sleeve is fitted onto the lower end of the side wall of the first battery body. The first sleeve and the second sleeve are fixedly connected by a first connecting rod. A first slot is formed on one side of the upper end of the side wall of the first sleeve, a second slot is formed on the other side of the upper end of the side wall of the first sleeve, a third slot is formed on one side of the upper end of the side wall of the second sleeve, and a fourth slot is formed on the other side of the upper end of the side wall of the second sleeve.

[0011] Furthermore, the second fixing component includes a third sleeve, which is fitted onto the upper end of the side wall of the second battery body, and a fourth sleeve is fitted onto the lower end of the side wall of the second battery body. The third sleeve and the fourth sleeve are fixedly connected by a second connecting rod. A fifth slot is provided on one side of the upper end of the side wall of the third sleeve, and a sixth slot is provided on the other side of the upper end of the side wall of the third sleeve. A seventh slot is provided on one side of the upper end of the side wall of the fourth sleeve, and an eighth slot is provided on the other side of the upper end of the side wall of the fourth sleeve.

[0012] Furthermore, the third fixing component includes a fifth sleeve, which is fitted onto the upper end of the side wall of the third battery body. A sixth sleeve is fitted onto the lower end of the side wall of the third battery body. The fifth sleeve and the sixth sleeve are fixedly connected by a third connecting rod. A ninth slot is provided on one side of the upper end of the side wall of the fifth sleeve, and a tenth slot is provided on the other side of the upper end of the side wall of the fifth sleeve. An eleventh slot is provided on one side of the upper end of the side wall of the sixth sleeve, and a twelfth slot is provided on the other side of the upper end of the side wall of the sixth sleeve.

[0013] Furthermore, the first connecting component includes a first connecting block and a second connecting block. One end of the first connecting block is fixedly connected to a first locking block, and the other end of the first connecting block is fixedly connected to a second locking block. The first locking block is used to be inserted into a second locking slot, and the second locking block is used to be inserted into a fifth locking slot. One end of the second connecting block is fixedly connected to a third locking block, and the other end of the second connecting block is fixedly connected to a fourth locking block. The third locking block is used to be inserted into a fourth locking slot, and the fourth locking block is used to be inserted into a seventh locking slot.

[0014] Furthermore, the second connecting component includes a third connecting block and a fourth connecting block. One end of the third connecting block is fixedly connected to a fifth locking block, and the other end of the third connecting block is fixedly connected to a sixth locking block. The fifth locking block is used to be inserted into a sixth locking slot, and the sixth locking block is used to be inserted into a ninth locking slot. One end of the fourth connecting block is fixedly connected to a seventh locking block, and the other end of the fourth connecting block is fixedly connected to an eighth locking block. The seventh locking block is used to be inserted into an eighth locking slot, and the eighth locking block is used to be inserted into an eleventh locking slot.

[0015] Furthermore, a first power connector and a second power connector are fixedly installed on the top of the first battery body, a third power connector is fixedly installed on the top of the second battery body, and a fourth power connector is fixedly connected to the top of the third battery body. The first power connector and the third power connector are wired together by a first connecting wire, and the second power connector and the fourth power connector are wired together by a second connecting wire. The first battery body, the second battery body, and the third battery body are connected in series.

[0016] Furthermore, an installation slot is provided on the upper end of the outer side wall of the protective shell, a plastic clip is fixedly connected to the side wall of the sealing cover, an inverted triangular clip is fixedly connected to the lower end of the side wall of the plastic clip, the inverted triangular clip is used to be locked in the installation slot, and multiple vent holes are provided on the top of the sealing cover.

[0017] This solution also discloses a method for using a combined lithium battery pack for electric vehicles, which mainly includes the following steps: Step 1: First, place the first and second sleeves onto the first battery body, then place the third and fourth sleeves onto the second battery body, and finally place the fifth and sixth sleeves onto the third battery body. Insert the first locking block into the second locking slot, the second locking block into the fifth locking slot, the third locking block into the fourth locking slot, and the fourth locking block into the seventh locking slot to secure the first and second battery bodies. Then, insert the fifth locking block into the sixth locking slot, the sixth locking block into the ninth locking slot, the seventh locking block into the eighth locking slot, and the eighth locking block into the eleventh locking slot to secure the second and third battery bodies. Subsequently, the first and third power connectors are wired together via the first connecting wire, and the second and fourth power connectors are wired together via the second connecting wire to provide power to the two-wheeled vehicle. Step 2: Then, place the combined first battery body, second battery body and third battery body into the protective shell, and use the vertical plate to hold the first battery body, second battery body and third battery body against it. When the protective shell is impacted, the force is transmitted through the slide bar to the fourth connecting rod, and then through the fourth connecting rod to the slider. The second battery body compresses the spring to absorb the force and complete the shock absorption process. Step 3: Finally, snap the inverted triangular clip on the sealing cap into the mounting slot to complete the installation. The vent hole is used to protect the heat dissipation inside the casing.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: The present invention provides a combined lithium battery pack for electric vehicles, achieving the following beneficial effects: (1) The first fixing component, the second fixing component and the third fixing component are connected in a detachable manner, which can ensure that the first, second and third battery bodies are stably placed in the protective shell, effectively preventing the batteries from shifting due to shaking and vibration during vehicle operation, avoiding collision damage between batteries, and improving the safety and reliability of the battery pack.

[0019] (2) The shock-absorbing components installed inside the protective shell transmit the force through the slide rod to the fourth connecting rod when the tram is impacted, and then through the fourth connecting rod to the slider. The slider squeezes the spring and uses the elastic deformation of the spring to absorb the impact force, effectively reducing the impact of external impact on the battery body, extending the battery life, and ensuring the stable operation of the battery under complex road conditions.

[0020] (3) The setting of the first connecting component and the second connecting component makes the assembly and disassembly of the battery pack simpler and faster, without the need for complicated tools, making it convenient to maintain, replace or repair the battery, improving work efficiency and reducing maintenance costs.

[0021] (4) The first battery body, the second battery body and the third battery body are connected in series through the power connector and the connecting wire. This electrical connection method has a simple structure and a firm connection, which can ensure stable current transmission, provide reliable power support for the two-wheeled vehicle, and facilitate the detection and monitoring of the electrical performance of the battery pack.

[0022] (5) The multiple vent holes on the sealing cover facilitate air circulation inside the protective shell, promote the dissipation of heat generated during the charging and discharging process of the battery pack, and prevent the battery from being affected by overheating and affecting its performance and lifespan. At the same time, the cooperation between the plastic clips and the inverted triangular clips and the mounting slots achieves a reliable seal between the sealing cover and the protective shell, preventing dust, moisture and other substances from entering the protective shell and protecting the battery pack from external environmental factors. Attached Figure Description

[0023] Figure 1 This is a front view of a combined lithium battery pack for electric vehicles proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of a combined lithium battery pack for electric vehicles proposed in this invention.

[0024] Figure 3 This is a top view of the internal structure of a combined lithium battery pack for electric vehicles proposed in this invention. Figure 1 ; Figure 4 This is a top view of the internal structure of a combined lithium battery pack for electric vehicles proposed in this invention. Figure 2 ; Figure 5 for Figure 2 Enlarged view of part A in the middle; Figure 6 for Figure 3 Enlarged view of part B in the middle section; Figure 7 for Figure 4 Enlarged view of part C in the middle.

[0025] The components include: 1. First battery body; 2. Second battery body; 3. Third battery body; 4. First connecting wire; 5. Second connecting wire; 6. Protective shell; 7. Sealing cover; 8. Shock-absorbing component; 9. First fixing component; 10. First connecting component; 11. Second fixing component; 12. Second connecting component; 13. Third fixing component; 14. First power connector; 15. Second power connector; 16. Third power connector; 17. Fourth power connector; 18. Mounting slot; 19. Vent hole; 20. Plastic clip; 21. Inverted triangular clip; 22. Slide groove; 23. Spring; 24. Slider; 25. Fourth connecting rod; 26. Vertical plate; 27. Slide rod; 28. First sleeve; 29. ​​Second sleeve; 30. First connecting... Connecting rod, 31, First slot, 32, Second slot, 33, Third slot, 34, Fourth slot, 35, First locking block, 36, Second locking block, 37, First connecting block, 38, Third locking block, 39, Fourth locking block, 40, Second connecting block, 41, Third sleeve, 42, Fourth sleeve, 43, Second connecting rod, 44, Fifth slot, 45, Sixth slot, 46, Seventh slot, 47, Eighth slot, 48, Fifth locking block, 49, Sixth locking block, 50, Third connecting block, 51, Seventh locking block, 52, Eighth locking block, 53, Fourth connecting block, 54, Fifth sleeve, 55, Sixth sleeve, 56, Third connecting rod, 57, Ninth slot, 58, Tenth slot, 59, Eleventh slot, 60, Twelfth slot.

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] like Figures 1-7As shown, the present invention proposes a combined lithium battery pack for electric vehicles, including a protective shell 6 and a sealing cover 7 disposed on the protective shell 6. A shock-absorbing component 8 is disposed inside the protective shell 6. A first battery body 1, a second battery body 2 and a third battery body 3 are placed inside the protective shell 6. A first fixing component 9 is fitted on the first battery body 1, a second fixing component 11 is fitted on the second battery body 2, and a third fixing component 13 is fitted on the third battery body 3. The first fixing component 9 and the second fixing component 11 are detachably connected by a first connecting component 10, and the second fixing component 11 and the third fixing component 13 are detachably connected by a second connecting component 12.

[0030] The shock-absorbing component 8 includes a slide groove 22, which is formed inside the wall of the protective housing 6. One end of a spring 23 is fixedly connected to the inner wall end of the slide groove 22, and the other end of the spring 23 is fixedly connected to a slider 24. The slider 24 is slidably disposed in the slide groove 22. One end of the slider 24 is hinged to one end of a fourth connecting rod 25, and the other end of the fourth connecting rod 25 is hinged to the side wall of the vertical plate 26. A slider 27 is fixedly connected to the side wall of the slider 27, and the slider 27 is slidably sleeved on the side wall of the protective housing 6.

[0031] The first fixing component 9 includes a first sleeve 28, which is fitted onto the upper end of the side wall of the first battery body 1. A second sleeve 29 is fitted onto the lower end of the side wall of the first battery body 1. The first sleeve 28 and the second sleeve 29 are fixedly connected by a first connecting rod 30. A first slot 31 is opened on one side of the upper end of the side wall of the first sleeve 28, and a second slot 32 is opened on the other side of the upper end of the side wall of the first sleeve 28. A third slot 33 is opened on one side of the upper end of the side wall of the second sleeve 29, and a fourth slot 34 is opened on the other side of the upper end of the side wall of the second sleeve 29.

[0032] The second fixing component 11 includes a third sleeve 41, which is fitted onto the upper end of the side wall of the second battery body 2. A fourth sleeve 42 is fitted onto the lower end of the side wall of the second battery body 2. The third sleeve 41 and the fourth sleeve 42 are fixedly connected by a second connecting rod 43. A fifth slot 44 is opened on one side of the upper end of the side wall of the third sleeve 41, and a sixth slot 45 is opened on the other side of the upper end of the side wall of the third sleeve 41. A seventh slot 46 is opened on one side of the upper end of the side wall of the fourth sleeve 42, and an eighth slot 47 is opened on the other side of the upper end of the side wall of the fourth sleeve 42.

[0033] The third fixing component 13 includes a fifth sleeve 54, which is fitted onto the upper side wall of the third battery body 3. A sixth sleeve 55 is fitted onto the lower side wall of the third battery body 3. The fifth sleeve 54 and the sixth sleeve 55 are fixedly connected by a third connecting rod 56. A ninth slot 57 is provided on one side of the upper side wall of the fifth sleeve 54, and a tenth slot 58 is provided on the other side of the upper side wall of the fifth sleeve 54. An eleventh slot 59 is provided on one side of the upper side wall of the sixth sleeve 55, and a twelfth slot 60 is provided on the other side of the upper side wall of the sixth sleeve 55.

[0034] The first connecting component 10 includes a first connecting block 37 and a second connecting block 40. One end of the first connecting block 37 is fixedly connected to a first locking block 35, and the other end of the first connecting block 37 is fixedly connected to a second locking block 36. The first locking block 35 is used to be inserted into a second locking slot 32, and the second locking block 36 is used to be inserted into a fifth locking slot 44. One end of the second connecting block 40 is fixedly connected to a third locking block 38, and the other end of the second connecting block 40 is fixedly connected to a fourth locking block 39. The third locking block 38 is used to be inserted into a fourth locking slot 34, and the fourth locking block 39 is used to be inserted into a seventh locking slot 46.

[0035] The second connecting component 12 includes a third connecting block 50 and a fourth connecting block 53. One end of the third connecting block 50 is fixedly connected to a fifth locking block 48, and the other end of the third connecting block 50 is fixedly connected to a sixth locking block 49. The fifth locking block 48 is used to be inserted into a sixth locking slot 45, and the sixth locking block 49 is used to be inserted into a ninth locking slot 57. One end of the fourth connecting block 53 is fixedly connected to a seventh locking block 51, and the other end of the fourth connecting block 53 is fixedly connected to an eighth locking block 52. The seventh locking block 51 is used to be inserted into an eighth locking slot 47, and the eighth locking block 52 is used to be inserted into an eleventh locking slot 59.

[0036] The top of the first battery body 1 is fixedly installed with a first power connector 14 and a second power connector 15. The top of the second battery body 2 is fixedly installed with a third power connector 16. The top of the third battery body 3 is fixedly connected with a fourth power connector 17. The first power connector 14 and the third power connector 16 are wiredly connected through a first connecting wire 4. The second power connector 15 and the fourth power connector 17 are wiredly connected through a second connecting wire 5.

[0037] The upper end of the outer side wall of the protective shell 6 is provided with a mounting slot 18, and a plastic clip 20 is fixedly connected to the side wall of the sealing cover 7. The lower end of the side wall of the plastic clip 20 is fixedly connected with an inverted triangular clip 21, which is used to be locked in the mounting slot 18. Multiple vent holes 19 are provided at the top of the sealing cover 7.

[0038] In practical use, firstly, the first sleeve 28 and the second sleeve 29 are fitted onto the first battery body 1, the third sleeve 41 and the fourth sleeve 42 are fitted onto the second battery body 2, and the fifth sleeve 54 and the sixth sleeve 55 are fitted onto the third battery body 3. The first locking block 35 is inserted into the second locking slot 32, the second locking block 36 into the fifth locking slot 44, the third locking block 38 into the fourth locking slot 34, and the fourth locking block 39 into the seventh locking slot 46, thus fixing the first battery body 1 and the second battery body 2. Then, the fifth locking block 48 is inserted into the sixth locking slot 45, the sixth locking block 49 into the ninth locking slot 57, the seventh locking block 51 into the eighth locking slot 47, and the eighth locking block 52 into the eleventh locking slot 59, thus fixing the second battery body 2 and the third battery body 3. Subsequently, the first power connector 14 and the third power connector 16 are connected via the first... The connecting wire 4 is wired, and the second power connector 15 and the fourth power connector 17 are wired through the second connecting wire 5. The first battery body 1, the second battery body 2, and the third battery body 3 are connected in series to provide power to the two-wheeled vehicle. Then, the combined first battery body 1, second battery body 2, and third battery body 3 are placed inside the protective shell 6. The vertical plate 26 is used to hold the first battery body 1, second battery body 2, and third battery body 3 in place. When the protective shell 6 is impacted, the force is transmitted through the sliding rod 27 to the fourth connecting rod 25, and then through the fourth connecting rod 25 to the slider 24. The second battery body 2 compresses the spring 23 to absorb the force, completing the shock absorption process. Finally, the inverted triangular clip 21 on the sealing cover 7 is clipped into the mounting slot 18 to complete the installation. The vent 19 is used for heat dissipation inside the protective shell 6. The above is the overall workflow of the present invention. This step can be repeated for the next use.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0041] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A combined lithium battery pack for electric vehicles, comprising a protective housing (6) and a sealing cover (7) disposed on the protective housing (6), characterized in that: The protective shell (6) is provided with a shock-absorbing component (8). The protective shell (6) contains a first battery body (1), a second battery body (2) and a third battery body (3). The first battery body (1) is fitted with a first fixing component (9), the second battery body (2) is fitted with a second fixing component (11), and the third battery body (3) is fitted with a third fixing component (13). The first fixing component (9) and the second fixing component (11) are detachably connected by a first connecting component (10), and the second fixing component (11) and the third fixing component (13) are detachably connected by a second connecting component (12).

2. The electric vehicle combined lithium battery pack according to claim 1, characterized in that: The shock-absorbing component (8) includes a groove (22), which is formed inside the wall of the protective shell (6). One end of a spring (23) is fixedly connected to the inner wall end of the groove (22), and the other end of the spring (23) is fixedly connected to a slider (24). The slider (24) is slidably disposed in the groove (22). One end of the slider (24) is hinged to one end of a fourth connecting rod (25), and the other end of the fourth connecting rod (25) is hinged to the side wall of the vertical plate (26). The slider (27) is fixedly connected to the side wall of the sliding rod (27), and the sliding rod (27) is slidably sleeved on the side wall of the protective shell (6).

3. The electric vehicle combined lithium battery pack according to claim 2, characterized in that: The first fixing component (9) includes a first sleeve (28), which is fitted on the upper end of the side wall of the first battery body (1). A second sleeve (29) is fitted on the lower end of the side wall of the first battery body (1). The first sleeve (28) and the second sleeve (29) are fixedly connected by a first connecting rod (30). A first slot (31) is opened on one side of the upper end of the side wall of the first sleeve (28), and a second slot (32) is opened on the other side of the upper end of the side wall of the first sleeve (28). A third slot (33) is opened on one side of the upper end of the side wall of the second sleeve (29), and a fourth slot (34) is opened on the other side of the upper end of the side wall of the second sleeve (29).

4. The electric vehicle combined lithium battery pack according to claim 3, characterized in that: The second fixing component (11) includes a third sleeve (41), which is fitted onto the upper end of the side wall of the second battery body (2). A fourth sleeve (42) is fitted onto the lower end of the side wall of the second battery body (2). The third sleeve (41) and the fourth sleeve (42) are fixedly connected by a second connecting rod (43). A fifth slot (44) is opened on one side of the upper end of the side wall of the third sleeve (41), a sixth slot (45) is opened on the other side of the upper end of the side wall of the third sleeve (41), a seventh slot (46) is opened on one side of the upper end of the side wall of the fourth sleeve (42), and an eighth slot (47) is opened on the other side of the upper end of the side wall of the fourth sleeve (42).

5. A combined lithium battery pack for electric vehicles according to claim 4, characterized in that: The third fixing component (13) includes a fifth sleeve (54), which is fitted onto the upper side wall of the third battery body (3). A sixth sleeve (55) is fitted onto the lower side wall of the third battery body (3). The fifth sleeve (54) and the sixth sleeve (55) are fixedly connected by a third connecting rod (56). A ninth slot (57) is opened on one side of the upper side wall of the fifth sleeve (54), and a tenth slot (58) is opened on the other side of the upper side wall of the fifth sleeve (54). An eleventh slot (59) is opened on one side of the upper side wall of the sixth sleeve (55), and a twelfth slot (60) is opened on the other side of the upper side wall of the sixth sleeve (55).

6. A combined lithium battery pack for electric vehicles according to claim 5, characterized in that: The first connecting component (10) includes a first connecting block (37) and a second connecting block (40). One end of the first connecting block (37) is fixedly connected to a first locking block (35), and the other end of the first connecting block (37) is fixedly connected to a second locking block (36). The first locking block (35) is used to be inserted into a second locking slot (32), and the second locking block (36) is used to be inserted into a fifth locking slot (44). One end of the second connecting block (40) is fixedly connected to a third locking block (38), and the other end of the second connecting block (40) is fixedly connected to a third locking block (38). The other end of the second connecting block (40) is fixedly connected to a fourth locking block (39). The third locking block (38) is used to be inserted into a fourth locking slot (34), and the fourth locking block (39) is used to be inserted into a seventh locking slot (46).

7. A combined lithium battery pack for electric vehicles according to claim 6, characterized in that: The second connecting component (12) includes a third connecting block (50) and a fourth connecting block (53). One end of the third connecting block (50) is fixedly connected to a fifth locking block (48), and the other end of the third connecting block (50) is fixedly connected to a sixth locking block (49). The fifth locking block (48) is used to be inserted into a sixth locking slot (45), and the sixth locking block (49) is used to be inserted into a ninth locking slot (57). One end of the fourth connecting block (53) is fixedly connected to a seventh locking block (51), and the other end of the fourth connecting block (53) is fixedly connected to an eighth locking block (52). The seventh locking block (51) is used to be inserted into an eighth locking slot (47), and the eighth locking block (52) is used to be inserted into an eleventh locking slot (59).

8. A combined lithium battery pack for electric vehicles according to claim 7, characterized in that: The top of the first battery body (1) is fixedly installed with a first power connector (14) and a second power connector (15), the top of the second battery body (2) is fixedly installed with a third power connector (16), the top of the third battery body (3) is fixedly connected with a fourth power connector (17), the first power connector (14) and the third power connector (16) are wiredly connected by a first connecting wire (4), the second power connector (15) and the fourth power connector (17) are wiredly connected by a second connecting wire (5), and the first battery body (1), the second battery body (2) and the third battery body (3) are connected in series.

9. A combined lithium battery pack for electric vehicles according to claim 8, characterized in that: The upper end of the outer side wall of the protective shell (6) is provided with a mounting slot (18), and a plastic clip (20) is fixedly connected to the side wall of the sealing cover (7). The lower end of the side wall of the plastic clip (20) is fixedly connected with an inverted triangular clip (21). The inverted triangular clip (21) is used to be clipped into the mounting slot (18). Multiple vent holes (19) are provided at the top of the sealing cover (7).

10. A method of using a combined lithium battery pack for electric vehicles, as described in claim 9, characterized in that, The main steps include the following: Step 1: First, put the first sleeve (28) and the second sleeve (29) onto the first battery body (1), put the third sleeve (41) and the fourth sleeve (42) onto the second battery body (2), put the fifth sleeve (54) and the sixth sleeve (55) onto the third battery body (3), insert the first locking block (35) into the second locking slot (32), insert the second locking block (36) into the fifth locking slot (44), insert the third locking block (38) into the fourth locking slot (34), and insert the fourth locking block (39) into the seventh locking slot (46) to complete the first battery body (1) and the second battery body. (2) Fixing: the fifth card block (48) is inserted into the sixth card slot (45), the sixth card block (49) is inserted into the ninth card slot (57), the seventh card block (51) is inserted into the eighth card slot (47), and the eighth card block (52) is inserted into the eleventh card slot (59), thus completing the fixing of the second battery body (2) and the third battery body (3). Then, the first power connector (14) and the third power connector (16) are wired together through the first connecting wire (4), and the second power connector (15) and the fourth power connector (17) are wired together through the second connecting wire (5) to provide power to the two-wheeled vehicle. Step 2: Then, the combined first battery body (1), second battery body (2) and third battery body (3) are placed inside the protective shell (6). The vertical plate (26) is used to hold the first battery body (1), second battery body (2) and third battery body (3) together. When the protective shell (6) is impacted, the force is transmitted through the slide bar (27) to the fourth connecting rod (25), and then through the fourth connecting rod (25) to the slider (24). The second battery body (2) squeezes the spring (23) to absorb the force and complete the shock absorption process. Step 3: Finally, insert the inverted triangular clip (21) on the sealing cover (7) into the mounting slot (18) to complete the installation. The vent (19) is used to protect the heat dissipation inside the outer shell (6).

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