Portable lithium battery pack structure

Abstract

The utility model discloses a portable lithium battery pack structure. The portable lithium battery pack structure comprises a battery shell, the lithium battery pack is mounted in the battery shell; the electrode terminal comprises a conductive connector and a mounting seat, a mounting hole matched with the mounting seat is formed in the battery shell, one end of the mounting seat is limited in the mounting hole, the conductive connector is fixed in the center of the mounting seat and electrically connected with the lithium battery pack, the other end of the mounting seat is positioned outside the mounting hole, and a plurality of lock catches are arranged on the edge of the mounting seat; the plurality of lock catches are uniformly distributed along the circumferential direction of the mounting seat by taking the conductive connector as a center, one end of each lock catch is fixedly connected with the mounting seat, the other end of each lock catch is suspended and is provided with a plurality of inverted teeth distributed along the circumferential direction at intervals, and the battery shell is provided with a plurality of assembly holes matched with the lock catches one by one; and the inverted teeth are inversely buckled on the inner side wall of the battery shell. The beneficial effects of the utility model are that the electrode terminals can be fixed through direct insertion, which is beneficial for improving the installation efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery pack structure, and in particular to a portable lithium battery pack structure. Background Technology

[0002] A lithium-ion battery pack is a battery system that combines multiple lithium-ion battery cells into a single enclosure. It has wide applications in various fields: energy storage, such as a 1.5MWh containerized large-scale energy storage system, which can be used for the conversion, storage, and discharge of renewable energy sources such as hydropower, wind power, and solar power, and is likened to a large power bank by the industry; in the marine sector, marine-grade box-type lithium-ion battery modules serve as an efficient, reliable, and lightweight power solution, improving the efficiency and stability of marine propulsion systems and suitable for various complex marine environments; and in the new energy vehicle sector, there are lithium-ion battery pack enclosure structures used in new energy vehicles to provide power to the cars.

[0003] In the prior art, when electrode terminals are mounted on the battery casing, they are usually fixed with fasteners. This is not conducive to improving installation efficiency and is prone to problems such as loosening of fasteners, which can lead to the electrode terminals falling off. Utility Model Content

[0004] The present invention aims to overcome the shortcomings of the low installation efficiency of electrode terminals in the prior art and provides a portable lithium battery pack structure that is conducive to improving installation efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A portable lithium battery pack structure, comprising:

[0007] The battery housing has handles rotatably connected to both the front and rear outer side walls.

[0008] The lithium battery pack is installed inside the battery casing;

[0009] The electrode terminal includes a conductive connector and a mounting base. The battery housing has mounting holes (not shown in the figure) that match the mounting base. One end of the mounting base is confined within the mounting hole. The conductive connector is fixed to the center of the mounting base and electrically connected to the lithium battery pack. The other end of the mounting base is located outside the mounting hole and has several latches on its edge. The latches are evenly distributed around the conductive connector along the circumference of the mounting base. One end of each latch is fixedly connected to the mounting base, and the other end of each latch is suspended and has several circumferentially spaced reverse teeth. The battery housing has several assembly holes (not shown in the figure) that match the latches one by one. The reverse teeth are snapped onto the inner sidewall of the battery housing. The handle facilitates the handling of the lithium battery pack. The conductive connector is fixed to the center of the mounting base, with one end inside the battery casing and electrically connected to the lithium battery pack, and the other end outside the battery casing and electrically connected to an external circuit. The mounting base facilitates the fixing of the conductive connector to the battery casing. During fixing, the mounting base is directly inserted into the corresponding mounting holes on the battery casing from the outside through several latches. During insertion, several backward teeth on the latches are squeezed together by the side wall of the mounting hole. After completely penetrating the mounting hole, they return to their original position under their own elasticity, so that the backward teeth are snapped against the inner side wall of the battery casing, and the mounting base is fixed. This direct insertion method replaces fasteners, which improves installation efficiency. On the other hand, it avoids direct contact between the conductive connector and the battery casing, preventing the battery casing from becoming electrified, thereby improving safety during use.

[0010] Preferably, the latch includes a circular lock seat, the outer wall of which is covered with an elastic washer. The lock seat is interference-fitted with a corresponding mounting hole through the washer. One end of the lock seat is fixedly connected to the mounting base. The other end of the lock seat is provided with a plurality of connecting blocks evenly distributed around the circumference of the lock seat. The plurality of connecting blocks are located at the edge of the lock seat, and a gap is formed between each two adjacent connecting blocks. One end of the connecting block is fixedly connected to the lock seat and forms an integral part thereon. The countertooth protrusion is provided on the outer wall of the other end of the connecting block. The washer facilitates the interference fit between the buckle and the corresponding mounting hole of the battery housing, achieving a sealing effect. A gap is formed between each pair of adjacent connecting blocks, allowing the buckle to be inserted into the corresponding mounting hole of the battery housing. Under the pressure of the mounting hole's sidewall, several connecting blocks cause their end teeth to move closer together, facilitating deformation of the connecting blocks as they pass through the mounting hole, thus achieving the assembly and fixation of the mounting base and the battery housing. The protruding end teeth on the outer sidewall of the other end of the connecting block allow them to be flipped onto the inner sidewall of the battery housing after passing through the mounting hole, thus fixing and locking the mounting base.

[0011] Preferably, the inner wall of the connecting block is perpendicular to the lock seat, the outer wall of the connecting block is inclined, and the thickness of the connecting block decreases linearly from the end fixedly connected to the lock seat to the other end. The outer wall of the connecting block at the end connected to the lock seat smoothly transitions to the outer wall of the lock seat. The inclined arrangement of the outer wall of the connecting block facilitates a better interference fit between the lock seat and the corresponding mounting hole, thereby sealing the mounting hole and achieving a sealing effect.

[0012] Preferably, the outer wall of the lock seat is provided with a sealing groove, and the washer is fitted inside the sealing groove. The thickness of the washer is the same as the depth of the sealing groove, which facilitates the insertion of the lock into the corresponding mounting hole on the battery housing, thereby reducing friction and wear on the washer during assembly. At the same time, the lock seat achieves a sealing effect through the interference fit between the washer and the corresponding mounting hole, and makes the fit between the electrode terminal and the battery housing more secure and stable, without any shaking.

[0013] Preferably, one side of the reverse tooth is fixedly connected to the connecting block and forms an integral part thereon. One end of the reverse tooth is close to the lock seat, and the other end is away from the lock seat. The corresponding other side of the reverse tooth slopes downward from the end away from the lock seat to the end close to the lock seat. The maximum outer diameter formed by several reverse teeth is larger than the diameter of the lock seat. The downward slope of the reverse teeth provides good guidance for the buckle to be inserted into the corresponding mounting hole of the battery housing. The maximum outer diameter formed by several reverse teeth is larger than the diameter of the lock seat, which facilitates that after the reverse teeth completely penetrate the corresponding mounting hole of the battery housing, they can be flipped onto the inner wall of the battery housing, thereby achieving the locking of the electrode terminals and the battery housing.

[0014] Preferably, the mounting base has a flange cover protruding outward from its edge. The flange cover is located outside the battery casing. The latch is located on one side of the flange cover and is fixedly connected to it. The inner side of the flange cover is fixedly connected to the mounting base and forms an integral part. A positioning block is fixedly protruding from the outer edge of the flange cover. The outer wall of the battery casing has a positioning groove that matches the positioning block. One end of the positioning block is perpendicular to the flange cover, and a sealing gasket is fixed to the other end of the positioning block. The positioning block and the latch are both located on the same side wall of the flange cover. When the electrode terminal is inserted into the battery casing, the positioning block is first aligned with the positioning groove for initial positioning. Then, the electrode terminal is pressed towards the battery casing. The latch engages with the corresponding mounting hole to lock the electrode terminal. At the same time, the positioning block is inserted into the positioning groove and presses the sealing gasket, further improving the sealing effect.

[0015] Preferably, the flange cover has protruding slots on both the left and right ends of the opposite side. The electrode terminal also includes a cap that completely covers the conductive connector. The top of the cap is closed, and the bottom of the cap is open. Elastic locking blocks are integrally formed on both the left and right sides of the open end of the cap, matching the slots on the left and right ends of the flange cover. The cap can be detachably connected to the flange cover after being snapped together with the corresponding slots by the elastic locking blocks. A wire outlet groove is formed on the side wall of the open end of the cap, and the side wall of the wire outlet groove extends outward to form a brim. The cap design improves safety during use.

[0016] The beneficial effects of this utility model are:

[0017] 1. The electrode terminals can be fixed by direct insertion instead of fasteners, which improves installation efficiency;

[0018] 2. The lock seat achieves a sealing effect by interfering with the corresponding mounting hole through the washer, which makes the fit between the electrode terminal and the battery shell more secure and stable, and prevents shaking.

[0019] 3. The positioning block facilitates initial positioning, and after being inserted into the positioning groove on the battery casing, it presses against the sealing gasket, further improving the sealing effect;

[0020] 4. The addition of a cap enhances safety during use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the electrode terminals;

[0023] Figure 3 This is a front view of the electrode terminals;

[0024] Figure 4 yes Figure 3 Sectional view of AA;

[0025] Figure 5 yes Figure 4 Enlarged view of the structure at point B;

[0026] Figure 6 This is a structural diagram of the cap.

[0027] In the diagram: 1. Battery casing, 2. Handle, 3. Cap, 4. Electrode terminal, 5. Conductive connector, 6. Mounting base, 7. Lock, 8. Backtooth, 9. Lock seat, 10. Washer, 11. Connecting block, 12. Gap, 13. Sealing groove, 14. Flange cover, 15. Positioning block, 16. Sealing gasket, 17. Slot, 18. Cap, 19. Elastic locking block, 20. Cable outlet. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0031] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In the embodiments described, a portable lithium battery pack structure includes a battery housing 1, with handles 2 rotatably connected to both the front and rear outer side walls of the battery housing 1; a lithium battery pack installed inside the battery housing 1; and electrode terminals 4, including conductive connectors 5 and mounting bases 6. The battery housing 1 has mounting holes that match the mounting bases 6. One end of the mounting base 6 is confined within the mounting holes. The conductive connectors 5 are fixed to the center of the mounting base 6 and electrically connected to the lithium battery pack. The other end of the mounting base 6 is located outside the mounting holes, and its edge is provided with several latches 7. The latches 7 are evenly distributed around the conductive connectors 5 along the circumference of the mounting base 6. One end of each latch 7 is fixedly connected to the mounting base 6, and the other end of each latch 7 is suspended and has several circumferentially spaced reverse teeth 8. The battery housing 1 has several assembly holes that match the latches 7 one by one, and the reverse teeth 8 are snapped onto the inner side wall of the battery housing 1.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the latch 7 includes a circular lock seat 9. An elastic washer 10 is wrapped around the outer wall of the lock seat 9. The lock seat 9 is interference-fitted with the corresponding mounting hole through the washer 10. One end of the lock seat 9 is fixedly connected to the mounting base 6. The other end of the lock seat 9 is provided with a number of connecting blocks 11 evenly distributed around the circumference of the lock seat 9. The connecting blocks 11 are located at the edge of the lock seat 9. A gap 12 is formed between each two adjacent connecting blocks 11. One end of the connecting block 11 is fixedly connected to the lock seat 9 and forms an integral part. The countertooth 8 is protruding on the outer wall of the other end of the connecting block 11.

[0034] The inner wall of the connecting block 11 is perpendicular to the lock seat 9, and the outer wall of the connecting block 11 is inclined. The thickness of the connecting block 11 decreases linearly from the end that is fixedly connected to the lock seat 9 to the other end. The outer wall of the end of the connecting block 11 that is connected to the lock seat 9 smoothly transitions and connects with the outer wall of the lock seat 9.

[0035] A sealing groove 13 is provided on the outer wall of the lock seat 9, and a washer 10 is fitted inside the sealing groove 13. The thickness of the washer 10 is the same as the depth of the sealing groove 13.

[0036] One side of the reverse tooth 8 is fixedly connected to the connecting block 11 and forms an integral part. One end of the reverse tooth 8 is close to the lock seat 9, and the other end of the reverse tooth 8 is far away from the lock seat 9. The other side of the reverse tooth 8 is inclined downward from the end away from the lock seat 9 to the end close to the lock seat 9. The maximum outer diameter formed by several reverse teeth 8 is greater than the diameter of the lock seat 9.

[0037] A flange cover 14 protrudes outward from the edge of the mounting base 6. The flange cover 14 is located outside the battery housing 1. The latch 7 is located on one side of the flange cover 14 and is fixedly connected to the flange cover 14. The inner side of the flange cover 14 is fixedly connected to the mounting base 6 and forms an integral part. A positioning block 15 is fixedly protruding from the outer edge of the flange cover 14. A positioning groove matching the positioning block 15 is provided on the outer wall of the battery housing 1. One end of the positioning block 15 is perpendicular to the flange cover 14. A sealing gasket 16 is fixed to the other end of the positioning block 15. The positioning block 15 and the latch 7 are both located on the same side wall of the flange cover 14.

[0038] like Figure 1 , Figure 2 and Figure 6 As shown, the flange cover 14 has slots 17 protruding from both the left and right ends on the opposite side. The electrode terminal 4 also includes a cap 18 that completely covers the conductive connector 5. The top of the cap 18 is closed, and the bottom of the cap 18 is open. Both the left and right sides of the open end of the cap 18 are integrally formed with elastic blocks 19 that match the slots 17 on the left and right ends of the flange cover 14. The cap 18 can be detachably connected to the flange cover 14 after being snapped together with the corresponding slots 17 by the elastic blocks 19. A wire outlet groove 20 is provided on the side wall of the open end of the cap 18. The side wall of the wire outlet groove 20 extends outward to form a brim 3.

[0039] The handle 2 facilitates the handling of the lithium battery pack; the conductive connector 5 is fixed to the center of the mounting base 6, with one end located inside the battery housing 1 and electrically connected to the lithium battery pack, and the other end located outside the battery housing 1 and electrically connected to the external circuit; one end of the conductive connector 5 is electrically connected to the battery, and the other end of the conductive connector 5 is electrically connected to the external circuit; the mounting base 6 facilitates the fixing of the conductive connector 5 to the battery housing 1. When fixing, when the electrode terminals are inserted into the battery housing 1, the positioning block 15 on the mounting base 6 is first aligned with the positioning groove (not shown in the figure) for preliminary positioning. Then, the mounting base 6 is directly inserted into the corresponding assembly hole (not shown in the figure) on the battery housing 1 from the outside through several latches 7. At the same time, the positioning block 15 is inserted into the positioning groove and presses the sealing gasket 16 to improve the sealing effect. During insertion, under the pressure of the sidewall of the mounting hole, several connecting blocks 11 cause their end teeth 8 to move closer together. After completely penetrating the mounting hole, they return to their original position under their own elasticity, causing the inverted teeth 8 to snap onto the inner sidewall of the battery casing 1, thus fixing the mounting base 6. This direct insertion method replaces fasteners, improving installation efficiency. After assembly, the locking seat 9 achieves a sealing effect through an interference fit between the washer 10 and the corresponding mounting hole, making the fit between the electrode terminals and the battery casing 1 more secure and stable, preventing any shaking.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable lithium battery pack structure, characterized in that it comprises: Battery housing (1), with handles (2) rotatably connected to both the front and rear outer side walls of the battery housing (1). A lithium battery pack is installed inside the battery casing (1); The electrode terminal (4) includes a conductive connector (5) and a mounting base (6). The battery housing (1) is provided with mounting holes that match the mounting base (6). One end of the mounting base (6) is limited to the mounting hole. The conductive connector (5) is fixed to the center of the mounting base (6) and electrically connected to the lithium battery pack. The other end of the mounting base (6) is located outside the mounting hole and its edge is provided with several latches (7). The several latches (7) are evenly distributed around the conductive connector (5) along the circumference of the mounting base (6). One end of the latch (7) is fixedly connected to the mounting base (6). The other end of the latch (7) is suspended and is provided with several circumferentially spaced reverse teeth (8). The battery housing (1) is provided with several assembly holes that match the latches (7). The reverse teeth (8) are snapped onto the inner sidewall of the battery housing (1).

2. The portable lithium battery pack structure according to claim 1, characterized in that, The latch (7) includes a circular lock seat (9), and an elastic washer (10) is wrapped around the outer wall of the lock seat (9). The lock seat (9) is interference-fitted with the corresponding mounting hole through the washer (10). One end of the lock seat (9) is fixedly connected to the mounting base (6). The other end of the lock seat (9) is provided with several connecting blocks (11) evenly distributed around the circumference of the lock seat (9). Several connecting blocks (11) are located at the edge of the lock seat (9). A gap (12) is formed between each two adjacent connecting blocks (11). One end of the connecting block (11) is fixedly connected to the lock seat (9) and forms an integral part. The countertooth (8) is protruding on the outer wall of the other end of the connecting block (11).

3. The portable lithium battery pack structure according to claim 2, characterized in that, The inner wall of the connecting block (11) is perpendicular to the lock seat (9), the outer wall of the connecting block (11) is inclined, the thickness of the connecting block (11) decreases linearly from the end that is fixedly connected to the lock seat (9) to the other end, and the outer wall of the end of the connecting block (11) that is connected to the lock seat (9) smoothly transitions and connects with the outer wall of the lock seat (9).

4. The portable lithium battery pack structure according to claim 3, characterized in that, The outer wall of the lock seat (9) is provided with a sealing groove (13), and the washer (10) is fitted inside the sealing groove (13). The thickness of the washer (10) is the same as the depth of the sealing groove (13).

5. The portable lithium battery pack structure according to claim 2, characterized in that, One side of the reverse tooth (8) is fixedly connected to the connecting block (11) and forms an integral part. One end of the reverse tooth (8) is close to the lock seat (9), and the other end of the reverse tooth (8) is far away from the lock seat (9). The other side of the reverse tooth (8) is inclined downward from the end away from the lock seat (9) to the end close to the lock seat (9). The maximum outer diameter formed by several reverse teeth (8) is greater than the diameter of the lock seat (9).

6. The portable lithium battery pack structure according to claim 1, characterized in that, The mounting base (6) has a flange cover (14) protruding outward from its edge. The flange cover (14) is located outside the battery housing (1). The latch (7) is located on one side of the flange cover (14) and is fixedly connected to the flange cover (14). The inner side of the flange cover (14) is fixedly connected to the mounting base (6) and forms an integral part. A positioning block (15) is fixedly protruding from the outer edge of the flange cover (14). The outer wall of the battery housing (1) is provided with a positioning groove that matches the positioning block (15). One end of the positioning block (15) is perpendicular to the flange cover (14). The other end of the positioning block (15) is fixed with a sealing gasket (16). The positioning block (15) and the latch (7) are both located on the same side wall of the flange cover (14).

7. The portable lithium battery pack structure according to claim 6, characterized in that, The flange cover (14) has slots (17) protruding on both the left and right sides of the corresponding side. The electrode terminal (4) also includes a cap (18) that completely covers the conductive connector (5). The top of the cap (18) is closed, and the bottom of the cap (18) is open. The left and right sides of the open end of the cap (18) are integrally formed with elastic blocks (19) that match the slots (17) on the left and right sides of the flange cover (14). The cap (18) can be detachably connected to the flange cover (14) after being snapped together with the corresponding slots (17) by the elastic blocks (19). A wire outlet groove (20) is provided on the side wall of the open end of the cap (18). The side wall of the wire outlet groove (20) extends outward to form a brim (3).

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