Multi-string power lithium battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a multi-string power lithium battery pack, an upper bracket and a lower bracket are assembled stably, the upper bracket and the lower bracket can be assembled by inserting a connecting column of the lower bracket into a connecting hole of the upper bracket, and the upper bracket and the lower bracket can be assembled by arranging an upper confluence sheet and a lower confluence sheet which correspond to each other. Through the arrangement of the upper backflow groove, the lower convergence groove, the upper positioning convex block and the lower positioning convex block, the upper convergence piece and the lower convergence piece can be stably assembled on the upper support and the lower support, the problem of internal short circuit of the battery pack caused by vehicle vibration, accidental impact and extrusion in the actual application process of the lithium battery pack can be solved, and the structural stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a multi-string power lithium battery pack. Background Art

[0002] At present, various lithium battery solutions on the market are different, the required number of lithium batteries is different, and the structural wiring methods are different. When the lithium battery is in operation, due to external vehicle factors, the lithium battery vibrates, or due to accidental factors, the lithium battery pack is impacted, dropped, squeezed, etc., resulting in a short-circuit risk of the internal electrical components of the lithium battery. Summary of the Invention

[0003] The utility model provides a multi-string power lithium battery pack for the problems of the prior art. The upper bracket and the lower bracket are stably assembled, which can reduce the problem of internal short circuit of the battery pack caused by vehicle vibration, accidental impact and extrusion during the actual application of the lithium battery pack, and improve the structural stability.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a multi-string power lithium battery pack, including an upper bracket, a lower bracket, a plurality of upper busbars and a plurality of lower busbars. The upper bracket is provided with a plurality of upper battery slots, and the lower bracket is provided with a plurality of lower battery slots corresponding to the upper battery slots one by one;

[0005] The upper bracket is provided with a plurality of upper busbar slots for assembling the upper busbars. Each upper busbar slot is provided with an upper welding hole, and each upper battery slot is communicated with one upper welding hole. The upper busbar is provided with an upper positioning convex block for assembling in the corresponding upper welding hole;

[0006] The lower bracket is provided with a plurality of lower busbar slots for assembling the lower busbars. Each lower busbar slot is provided with a lower welding hole, and each lower battery slot is communicated with one lower welding hole. The lower busbar is provided with a lower positioning convex block for assembling in the corresponding lower welding hole;

[0007] The upper bracket is provided with a plurality of connection holes, and the lower bracket is provided with a plurality of connection columns for assembling in the connection holes.

[0008] Preferably, the connection hole is provided with a thread, and the connection column is provided with a screw hole, and the connection column and the connection hole are locked by screws.

[0009] Preferably, a plurality of first wire grooves are provided on the outer periphery of the upper bracket, and a plurality of second wire grooves are provided on the outer periphery of the lower bracket, and the first wire grooves are communicated with the corresponding second wire grooves.

[0010] Preferably, it further includes a cable protection sleeve. The upper bracket includes at least two upper sub - brackets, and the cable protection sleeve is installed on the outer periphery of each upper sub - bracket; the lower bracket includes at least two lower sub - brackets, and the cable protection sleeve is installed on the outer periphery of each lower sub - bracket.

[0011] One end of the cable protection sleeve is hinged to one end of the corresponding upper sub - bracket or lower sub - bracket, and the other end of the cable protection sleeve is sleeved on the other end of the corresponding upper sub - bracket or lower sub - bracket.

[0012] The cable protection sleeve is provided with a number of limiting rings. Each first wire groove or second wire groove is correspondingly provided with a limiting ring, and the number of limiting rings is used to block the openings of the first wire groove and the second wire groove.

[0013] Preferably, both the upper bracket and the lower bracket are made of ABS material.

[0014] Preferably, the upper bracket is provided with a first heat dissipation groove, and the lower bracket is provided with a second heat dissipation groove, and the first heat dissipation groove is communicated with the second heat dissipation groove.

[0015] The beneficial effects of the present utility model:

[0016] A multi - string power lithium battery pack provided by the present utility model has stable assembly of the upper bracket and the lower bracket. The connecting column of the lower bracket can be inserted into the connecting hole of the upper bracket to assemble the upper bracket and the lower bracket. Moreover, by setting the corresponding upper busbar and lower busbar, through the settings of the upper return groove, lower return groove, upper positioning convex block and lower positioning convex block, the upper busbar and the lower busbar can be stably assembled on the upper bracket and the lower bracket, which can reduce the problem of internal short - circuit of the battery pack caused by vehicle vibration, accidental impact and extrusion during the actual application of the lithium battery pack, and improve the structural stability. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the exploded structural schematic diagram of the present utility model;

[0019] Figure 3 is the structural schematic diagram of the upper bracket of the present utility model;

[0020] Figure 4 is the structural schematic diagram of the lower bracket of the present utility model;

[0021] Figure 5 is the structural schematic diagram of the upper busbar of the present utility model;

[0022] Figure 6 is the structural schematic diagram of the lower busbar of the present utility model;

[0023] Figure 7 Structural schematic of the present utility model with a cable protection sleeve Figure 1 ;

[0024] Figure 8 Structural schematic diagram of the cable protection sleeve of the present utility model;

[0025] Figure 9 Structural schematic of the present utility model with a cable protection sleeve Figure 2 .

[0026] In Figures 1 to 9 the reference numerals include:

[0027] 1 - upper bracket, 2 - lower bracket, 3 - upper bus bar, 4 - lower bus bar, 5 - upper battery slot, 6 - lower battery slot, 8 - upper welding hole, 9 - upper positioning bump, 12 - lower positioning bump, 13 - connection hole, 14 - connection post, 15 - first wire groove, 16 - second wire groove, 17 - first heat dissipation groove, 18 - second heat dissipation groove, 19 - cable protection sleeve, 20 - upper sub - bracket, 21 - lower sub - bracket, 22 - limiting ring, 23 - rubber pad. Specific embodiments

[0028] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

[0029] A multi - string power lithium - ion battery pack provided in this embodiment, such as Figures 1 to 6 , includes an upper bracket 1, a lower bracket 2, a plurality of upper bus bars 3 and a plurality of lower bus bars 4. The upper bracket 1 is provided with a plurality of upper battery slots 5, and the lower bracket 2 is provided with a plurality of lower battery slots 6 that correspond one - to - one with the upper battery slots 5;

[0030] The upper bracket 1 is provided with a plurality of upper bus bar grooves (not shown in the drawings) for assembling the upper bus bars 3. Each upper bus bar groove is provided with an upper welding hole 8. Each upper battery slot 5 communicates with one of the upper welding holes 8. The upper bus bar 3 is provided with an upper positioning bump 9, and the upper positioning bump 9 is used for assembling in the corresponding upper welding hole 8; The lower bracket 2 is provided with a plurality of lower bus bar grooves (not shown in the drawings) for assembling the lower bus bars 4. Each lower bus bar groove is provided with a lower welding hole. Each lower battery slot 6 communicates with one of the lower welding holes. The lower bus bar 4 is provided with a lower positioning bump 12, and the lower positioning bump 12 is used for assembling in the corresponding lower welding hole (not shown in the drawings); The upper bracket 1 is provided with a plurality of connection holes 13, and the lower bracket 2 is provided with a plurality of connection posts 14. The connection posts 14 are used for assembling in the connection holes 13.

[0031] Specifically, as Figures 1 to 6 shown, the upper bracket 1 and the lower bracket 2 of this embodiment are positioned and connected through the arrangement of the connecting column 14 and the connecting hole 13, making the assembly process simpler. Further, to ensure the stability of the assembly, the connecting hole 13 of this embodiment is provided with threads (not shown in the drawings), and the connecting column 14 is provided with screw holes (not shown in the drawings). After inserting the connecting column 14 into the corresponding connecting hole 13, the connecting column 14 and the connecting hole 13 are locked by screws, thereby locking the upper bracket 1 and the lower bracket 2, improving the assembly stability of this embodiment and reducing the short - circuit problem caused by collision.

[0032] Further, the structures of the upper bus bar 3 and the lower return bus bar of this embodiment are as Figures 1 to 6 shown. During assembly, the upper bus bar 3 is placed into the corresponding upper bus bar groove, and the upper positioning bump 9 is located in the corresponding upper welding hole 8, thereby completing the installation and positioning of the upper bus bar 3. Then, the upper bus bar 3, the connecting column 14, and the connecting hole 13 are locked together by screws to complete the assembly. The structure and assembly method of the lower bus bar 4 are the same as those of the upper bus bar 3. The positioning of the lower return bus bar groove and the lower positioning bump 12 helps with accurate assembly and locks it with the lower bracket 2.

[0033] Furthermore, as Figures 1 to 6 shown, a plurality of first wire grooves 15 are provided on the outer periphery of the upper bracket 1, and a plurality of second wire grooves 16 are provided on the outer periphery of the lower bracket 2, and the first wire grooves 15 communicate with the corresponding second wire grooves 16.

[0034] Specifically, as Figures 1 to 6 shown, the first wire grooves 15 are provided on the outer periphery of the upper bracket 1, and the second wire grooves 16 are provided on the outer periphery of the lower bracket 2. That is, the wiring of cables such as the voltage signal lines of the battery is on the outer periphery, rather than in the upper battery slot 5 and the lower battery slot 6. Therefore, even in the event of impacts and other situations, it is not easy to cause short - circuits due to the signal lines.

[0035] Further, as Figures 7 to 9As shown, this embodiment also provides a cable protection sleeve 19. The upper bracket includes at least two upper sub - brackets 20, and the cable protection sleeve 19 is installed on the outer periphery of each upper sub - bracket 20; the lower bracket includes at least two lower sub - brackets, and the cable protection sleeve 19 is installed on the outer periphery of each lower sub - bracket; one end of the cable protection sleeve 19 is hinged to one end of the corresponding upper sub - bracket 20 or lower sub - bracket, and the other end of the cable protection sleeve 19 is sleeved on the other end of the corresponding upper sub - bracket 20 or lower sub - bracket; the cable protection sleeve 19 is provided with a number of limiting rings 22, and each limiting ring 22 corresponds to the first wire groove or the second wire groove, and the number of limiting rings 22 is used to block the openings of the first wire groove and the second wire groove.

[0036] Specifically, because the upper bracket is provided with corresponding upper battery slots, the appearance of the upper bracket is in a shape similar to a circular - ring wave. The appearance shape of the lower bracket is correspondingly set with that of the upper bracket. Therefore, the shape of the cable protection sleeve 19 is adapted to the appearances of the upper bracket and the lower bracket. As Figure 7 shown, after the cable protection sleeve 19 is assembled, its inner wall fits with the upper sub - bracket 20 or the lower sub - bracket. One end of the cable protection sleeve 19 is hinged to the upper sub - bracket 20 or the lower sub - bracket through a common hinge or the like, and the other end is in an arc shape, so it can be buckled to the other end of the upper sub - bracket 20 and the other end of the lower sub - bracket. The cable protection sleeve 19 can be fixed through the shape - matching. Further, a rubber pad 23 is installed between two adjacent cable protection sleeves 19. As Figure 8 shown, after two adjacent cable protection sleeves 19 are assembled, a rubber pad 23 is provided at the end where the cable protection sleeve 19 is buckled to the upper sub - bracket 20 or the lower sub - bracket. The frictional resistance of the two rubber pads 23 makes it more difficult for the two adjacent cable protection sleeves 19 to automatically loosen without external force assistance, improving the assembly stability of the cable protection sleeve 19. As Figure 7 shown, through the limiting rings 22 provided on the cable protection sleeve 19, the openings of the first wire groove and the second wire groove can be blocked, thereby preventing the signal cables in the first wire groove and the second wire groove from being pulled out and preventing the influence on the use of the lithium battery.

[0037] Both the upper bracket 1 and the lower bracket 2 of this embodiment are made of fire - resistant ABS material, which has the characteristics of good fire - resistance performance, good structural strength, light weight, etc., and can improve the service life of the upper bracket 1 and the lower bracket 2.

[0038] As Figures 1 to 6 shown, the upper bracket 1 is provided with a first heat dissipation groove 17, and the lower bracket 2 is provided with a second heat dissipation groove 18, and the first heat dissipation groove 17 communicates with the second heat dissipation groove 18. Specifically, during the use of the battery, a large amount of heat is easily generated, so it is necessary to discharge it in time through the first heat dissipation groove 17 and the second heat dissipation groove 18.

[0039] In this embodiment, the upper bracket 1 and the lower bracket 2 are stably assembled. The connecting column 14 of the lower bracket 2 can be inserted into the connecting hole 13 of the upper bracket 1 to assemble the upper bracket 1 and the lower bracket 2. Moreover, by providing corresponding upper busbars 3 and lower busbars 4, through the settings of the upper return groove, lower return groove, upper positioning convex block 9 and lower positioning convex block 12, the upper busbar 3 and the lower busbar 4 can be stably assembled on the upper bracket 1 and the lower bracket 2, which can reduce the problem of internal short circuit of the lithium battery pack caused by vehicle vibration, accidental impact and extrusion during the actual application process of the lithium battery pack, enable the lithium battery pack to work stably for a long time, and is internally provided with a dedicated cable wiring to improve the structural stability.

[0040] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content into equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical concept of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A multi-string power lithium battery pack, characterized in that: It comprises an upper bracket, a lower bracket, a plurality of upper busbars and a plurality of lower busbars, wherein the upper bracket is provided with a plurality of upper battery slots, and the lower bracket is provided with a plurality of lower battery slots corresponding to the upper battery slots one by one; The upper bracket is provided with a plurality of upper busbar grooves for assembling the upper busbars, each of the upper busbar grooves is provided with an upper welding hole, each of the upper battery slots is connected with one of the upper welding holes, and the upper busbars are provided with upper positioning protrusions, and the upper positioning protrusions are used to be assembled in the corresponding upper welding holes; The lower bracket is provided with a plurality of lower busbar grooves for assembling the lower busbars, each of the lower busbar grooves is provided with a lower welding hole, each of the lower battery slots is connected with one of the lower welding holes, and the lower busbar is provided with a lower positioning protrusion, and the lower positioning protrusion is used to be assembled in the corresponding lower welding hole; The upper bracket is provided with a plurality of connection holes, and the lower bracket is provided with a plurality of connection columns, and the connection columns are used to be assembled in the connection holes.

2. A multi-string power lithium battery pack according to claim 1, characterized in that: The connecting hole is provided with a thread, and the connecting column is provided with a screw hole, and the connecting column and the connecting hole are locked by means of screws.

3. A multi-string power lithium battery pack according to claim 1, characterized in that: A plurality of first wire grooves are arranged on the outer periphery of the upper bracket, and a plurality of second wire grooves are arranged on the outer periphery of the lower bracket, wherein the first wire grooves are connected to the corresponding second wire grooves.

4. A multi-string power lithium battery pack according to claim 3, characterized in that: It also includes a cable protection cover, wherein the upper bracket includes at least two upper sub-racks, and the outer periphery of each upper sub-rack is equipped with the cable protection cover; the lower bracket includes at least two lower sub-racks, and the outer periphery of each lower sub-rack is equipped with the cable protection cover; One end of the cable protective cover is hinged to one end of the corresponding upper sub-frame or one end of the lower sub-frame, and the other end of the cable protective cover is sleeved on the other end of the corresponding upper sub-frame or the other end of the lower sub-frame; The cable protective cover is provided with a plurality of limiting rings, each of the first wire trough or the second wire trough is correspondingly provided with a limiting ring, and the plurality of limiting rings are used to cover the notches of the first wire trough and the notches of the second wire trough.

5. A multi-string power lithium battery pack according to claim 1, characterized in that: The upper bracket and the lower bracket are both made of ABS material.

6. A multi-string power lithium battery pack according to claim 1, characterized in that: The upper bracket is provided with a first heat dissipation slot, the lower bracket is provided with a second heat dissipation slot, and the first heat dissipation slot is communicated with the second heat dissipation slot.

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