A lithium electronic power battery pack

Abstract

The application discloses a lithium electronic power battery pack and relates to the technical field of power battery packs.The lithium electronic power battery pack comprises a shell, a through hole formed in the side surface of the shell, a lithium battery module arranged in the accommodating space of the shell, a plurality of lithium battery monomers, a wiring port of the lithium battery module, a wire, an end plate arranged on the two sides of the shell, a wind cooling assembly embedded on the end plate on one side, and a pipeline group capable of circulating cooling liquid arranged in the inner cavity of the shell and at the lower side.The lithium electronic power battery pack has a reasonable structure, and the wind cooling assembly and the pipeline group capable of circulating cooling liquid are combined with the existing power battery pack, so that comprehensive and efficient cooling work can be implemented at different positions of the pipeline group, the temperature of the pipeline capable of circulating cooling liquid is rapidly reduced, and the influence of the high-temperature environment inside the power battery pack on the pipeline group for liquid cooling is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power battery packs, in particular to a lithium electronic power battery pack. BACKGROUND

[0002] A power lithium ion battery refers to a lithium ion battery with a capacity of more than 3 AH. At present, the power lithium ion battery refers to a lithium ion battery capable of driving equipment, instruments, models and vehicles through discharging. Due to different use objects, the capacity of the battery may not reach the level of unit AH. A battery pack of an electric vehicle is mainly composed of battery monomers and modules. The battery monomer refers to a single independent lithium battery. A plurality of battery monomers are combined together to form a module. A plurality of modules are combined together to finally form a battery pack.

[0003] In the actual application process, the existing lithium electronic power battery pack mostly adopts a liquid cooling mode to cool the lithium battery module in the battery pack, so as to reduce the temperature in the charging and discharging process of the power battery pack and guarantee the stable operation of the power battery pack. However, the existing coil pipe for circulating cooling liquid is mostly installed in the interior of the battery pack. If the operating temperature of the battery pack is increased, the temperature of the pipe body of the coil pipe is also increased, which easily leads to the increase of the temperature of the cooling liquid circulating in the interior of the coil pipe and reduces the cooling efficiency. SUMMARY

[0004] In view of the above problems, the application provides a lithium electronic power battery pack.

[0005] To achieve the above purpose, the application provides the following technical scheme: a lithium electronic power battery pack, comprising a shell and a through hole formed in the side surface of the shell. A lithium battery module is arranged in the accommodation space of the shell. The lithium battery module is composed of a plurality of lithium battery monomers. A wiring port of the lithium battery module is provided with a wire. The wire is located above the lithium battery module. End plates are arranged on both sides of the shell. A wind cooling assembly is embedded on the end plate on one side. A pipe group capable of circulating cooling liquid is arranged in the inner cavity of the shell and at the lower side. A flow force cooling assembly is arranged in the gap between the pipe groups. The flow force cooling assembly can be located at different positions of the pipe group to perform cooling work.

[0006] Further, the wind cooling assembly comprises a hollow shell. A fan assembly is mounted in the inner cavity of the shell. The fan blades of the fan assembly are opposite to the lithium battery module.

[0007] Barrier net racks one and two are respectively mounted at the openings of both ends of the shell to isolate impurities. The barrier net rack two is located in the opposite space of the fan assembly and the lithium battery module. A flow guide rack is arranged on the surface of the barrier net rack two. The flow guide rack is in a funnel shape and is used for dispersing the airflow generated by the operation of the fan assembly.

[0008] Further, the pipeline group comprises sequentially connected flow pipeline one, flow pipeline two and connecting pipe, the flow pipeline one, the flow pipeline two and the connecting pipe are all arranged in the shape of coil, the flow pipeline one and the flow pipeline two are all located below the lithium battery module, the connecting pipe is installed between the flow pipeline one and the flow pipeline two, and the connecting pipe is clamped at the outer edge of the flow guide frame.

[0009] Further, the flow force cooling assembly comprises a support strip fixed to the inner bottom wall of the shell, a channel for airflow passing through is formed in the support strip, and a plurality of heat dissipation fins are arranged on the inner wall of the channel, and the heat dissipation fins extend to the gap between the flow pipeline one and the flow pipeline two.

[0010] A plurality of linkage members are detachably mounted on the support strip, and the linkage members are opposite to the curved parts of the flow pipeline one and the flow pipeline two.

[0011] Further, the linkage member comprises a rotating shaft detachably mounted on the inner bottom wall of the support strip, a sleeve is rotatably connected to the outer side of the rotating shaft, and a plurality of follower blades that can be driven to rotate by airflow are arranged on the outer surface of the sleeve.

[0012] Further, the flow force cooling assembly further comprises a plurality of supporting plates fixed to the top of the support strip, and the supporting plates abut against the bottom of the lithium battery module.

[0013] Further, the end plate located on the opposite side of the air cooling assembly is provided with parallel liquid inlet and liquid outlet, and the liquid inlet and the liquid outlet are respectively connected and installed with the opening of the flow pipeline two and the flow pipeline one.

[0014] Further, the opening end with a smaller diameter of the flow guide frame corresponds to the flow port at the center of the surface of the blocking net frame two, forming a channel for airflow to pass through.

[0015] Further, the outer surface of the flow pipeline one and the flow pipeline two is sleeved with a support, and the two symmetrical supporting legs of the support are fixed to the inner bottom wall of the shell.

[0016] In summary, the technical effects and advantages of the present application are as follows:

[0017] The present application has a reasonable structure, and can be located at different positions of the pipeline group to perform comprehensive and efficient cooling work, quickly reduce the temperature of the pipeline with cooling liquid, and reduce the influence of the high temperature environment inside the power battery pack on the pipe group for liquid cooling. Further, after reducing the temperature of the pipe, the temperature rising speed of the cooling liquid flowing inside the pipe can be effectively reduced, the cooling efficiency of the cooling liquid in the process of circulating and cooling is improved, and the long-term use of the cooling liquid is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is a schematic view of the three-dimensional structure of the present application.

[0020] Figure 2 It is a schematic view of the second perspective structure of the present application.

[0021] Figure 3 It is a schematic view of the bottom of the shell.

[0022] Figure 4 It is a schematic view of the position structure of the lithium battery module and the shell.

[0023] Figure 5 It is a schematic view of the position structure of the flow force cooling assembly, the air cooling assembly and the pipeline group.

[0024] Figure 6 It is a schematic view of the second perspective structure of the flow force cooling assembly, the air cooling assembly and the pipeline group.

[0025] Figure 7 It is a schematic view of the air cooling assembly structure.

[0026] Figure 8 It is a schematic view of the flow force cooling assembly structure.

[0027] Figure 9 It is a schematic view of the linkage.

[0028] In the figure: 1, shell; 2, lithium battery module; 3, wire; 4, end plate; 5, air cooling assembly; 51, shell; 52, fan assembly; 53, blocking net rack one; 54, blocking net rack two; 55, flow guide rack; 6, through hole; 7, liquid inlet; 8, liquid outlet; 9, support; 10, flow pipe one; 11, flow pipe two; 12, communication pipe; 13, support strip; 14, cooling fin; 15, supporting plate; 16, linkage; 161, rotating shaft; 162, sleeve; 163, follow-up blade. DETAILED DESCRIPTION

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Reference Figure 1 , Figure 2 The lithium-ion battery pack shown includes a housing 1 and a through hole 6 on the side of the housing 1. A lithium battery module 2 is disposed in the accommodating space of the housing 1. The lithium battery module 2 is composed of multiple lithium battery cells, and the wiring port of the lithium battery module 2 is provided with a wire 3. The wire 3 is located above the lithium battery module 2. End plates 4 are provided on both sides of the housing 1. A circuit plug is installed on the end plate 4. A cooling component 5 is embedded on one side of the end plate 4. A pipe group for flowing coolant is provided in the inner cavity of the housing 1 and near the bottom. The pipe group is arranged in a coil shape. Through the cooling methods of air cooling and liquid cooling, the temperature inside the entire power battery pack can be quickly reduced.

[0031] When the power battery pack is in a high-temperature environment, the temperature of the pipe assembly also rises due to the temperature. In order to reduce the temperature of the pipe assembly, a flow cooling component is installed inside the gap of the pipe assembly, which can be located at different positions of the pipe assembly to carry out cooling work, in combination with the existing air-cooling component 5 of the power battery pack and the pipe assembly through which coolant flows.

[0032] like Figure 7 As shown, the air-cooled assembly 5 includes a hollow housing 51, and a fan assembly 52 is installed inside the housing 51. The fan blades of the fan assembly 52 face the lithium battery module 2. The airflow generated when the fan assembly 52 is running can come into contact with the lithium battery module 2, reducing the temperature of the lithium battery module 2 during charging and discharging.

[0033] A first barrier mesh frame 53 and a second barrier mesh frame 54 are respectively installed at the two openings of the housing 51 to isolate impurities. The second barrier mesh frame 54 is located in the space between the fan assembly 52 and the lithium battery module 2. A guide frame 55 is provided on the surface of the second barrier mesh frame 54. The guide frame 55 is funnel-shaped and is used to disperse the airflow generated by the operation of the fan assembly 52. ​​The purpose of providing the guide frame 55 is to evenly disperse the airflow generated by the operation of the fan assembly 52, so that the airflow fully contacts the lithium battery module 2, thereby improving the efficiency of heat dissipation.

[0034] like Figure 3 , Figure 5 and Figure 6As shown, the pipe group includes sequentially connected flow pipeline one 10, flow pipeline two 11 and connecting pipe 12, and the flow pipeline one 10, flow pipeline two 11 and connecting pipe 12 are all arranged in a coil shape. During the flow of the cooling liquid in the flow pipeline one 10 and flow pipeline two 11, the curved pipe structure can easily reduce the speed of the cooling liquid, so as to facilitate the full heat dissipation of the lithium battery module 2.

[0035] The flow pipeline one 10 and flow pipeline two 11 are located below the lithium battery module 2, the connecting pipe 12 is installed between the flow pipeline one 10 and flow pipeline two 11, and the connecting pipe 12 is clamped at the outer edge of the flow guide frame 55. The cooling liquid flowing in the flow pipeline one 10, flow pipeline two 11 and connecting pipe 12 can take away a large amount of heat generated by the operation of the lithium battery module 2 to play a heat dissipation role. Since the connecting pipe 12 is clamped at the outer edge of the flow guide frame 55, when the fan assembly 52 operates, the airflow dispersed by the flow guide frame 55 can pass through the connecting pipe 12 to perform heat dissipation on the pipe body of the connecting pipe 12.

[0036] Embodiment 2: as shown in Figure 5 , Figure 6 and Figure 8 When the power battery pack is in a high-temperature environment, the temperature of the pipe group also rises due to the influence of the temperature. In order to reduce the temperature of the pipe group, in combination with the existing air cooling assembly 5 of the power battery pack, a flow force cooling assembly is further provided. The flow force cooling assembly includes a support strip 13 fixed to the inner bottom wall of the shell 1, a channel for airflow passing through is formed in the support strip 13, a plurality of heat dissipation fins 14 are arranged on the inner wall of the channel, and the heat dissipation fins 14 extend to the gap between the pipe bodies of the flow pipeline one 10 and flow pipeline two 11. The surface of the heat dissipation fin 14 is coated with a layer of heat-conducting silicone grease. The heat around the flow pipeline one 10 and flow pipeline two 11 is effectively conducted to the heat dissipation fin 14, and then dissipated to the surrounding air through the heat dissipation fin 14.

[0037] A plurality of linkage members 16 are detachably installed on the support strip 13, and the linkage members 16 are opposite the curved parts of the pipe bodies of the flow pipeline one 10 and flow pipeline two 11. The purpose of arranging the linkage members 16 opposite the curved parts is to rotate under the action of the airflow generated by the operation of the fan assembly 52 to further generate airflow and contact the pipe bodies of the flow pipeline one 10 and flow pipeline two 11. Under the premise that the fan assembly 52 operates, the heat dissipation efficiency of the flow pipeline one 10 and flow pipeline two 11 can be effectively improved. In combination with the operation of the fan assembly 52 to generate airflow in contact with the connecting pipe 12, the flow force cooling assembly is close to different positions of the flow pipeline one 10 and flow pipeline two 11, and can comprehensively cool the pipe group.

[0038] As shown in Figure 8 , Figure 9As shown, linkage 16 includes a rotating shaft 161 detachably mounted on the inner bottom wall of support strip 13, and a sleeve 162 rotatably connected to the outer side of rotating shaft 161. Sleeve 162 is provided with a plurality of follow-up vanes 163 on the outer surface thereof, which can be driven to rotate by airflow. When fan assembly 52 is in operation, airflow can pass through the channels on the surface of support strip 13 and contact linkage 16. Follow-up vanes 163 in linkage 16 are arranged in an arc shape, and can be driven to rotate by airflow.

[0039] The airflow generated by the rotation of follow-up vanes 163 can contact the pipe group. By generating airflow through rotation, the air flow near the pipe group can be increased, the temperature of circulation pipeline 10 and circulation pipeline 11 can be quickly reduced, and the influence of the high-temperature environment inside the power battery pack on circulation pipeline 10 and circulation pipeline 11 can be reduced.

[0040] Further, after the temperature of circulation pipeline 10 and circulation pipeline 11 is reduced, the temperature rising speed of the cooling liquid flowing in circulation pipeline 10 and circulation pipeline 11 can be effectively reduced, the cooling efficiency of the cooling liquid in the circulation and cooling process is improved, and the long-term use of the cooling liquid is facilitated.

[0041] As shown in Figure 3 , Figure 5 , the flow force cooling assembly further includes a plurality of supporting plates 15 fixed to the top of support strip 13. Supporting plates 15 abut against the bottom of lithium battery module 2. Supporting plates 15 are provided to maintain the stability of the entire lithium battery module 2, and have a supporting and positioning effect. Circulation pipeline 10 and circulation pipeline 11 are located below supporting plates 15 and abut against supporting plates 15, and implement liquid cooling work on lithium battery module 2.

[0042] As shown in Figure 2 , Figure 6 , end plate 4 located on the opposite side of air cooling assembly 5 is provided with parallel liquid inlet 7 and liquid outlet 8. Liquid inlet 7 and liquid outlet 8 are respectively connected and installed with the opening of circulation pipeline 11 and circulation pipeline 10. Liquid inlet 7 and liquid outlet 8 are provided to facilitate the connection of external cooling liquid pipes, so as to form the passage of the inflow and outflow of cooling liquid.

[0043] As shown in Figure 5 , Figure 7 , the smaller opening end of flow guide frame 55 corresponds to the flow-through opening in the center of surface of barrier net frame 2, forming a channel for airflow to pass through. When fan assembly 52 is in operation, a part of the airflow still directly reaches the surface of lithium battery module 2, and the airflow contacts the center of lithium battery module 2, thereby ensuring the heat dissipation effect.

[0044] As shown in Figure 6As shown, the outer surface of the flow pipeline one 10 and the flow pipeline two 11 is sleeved with the support 9, and the two symmetrical legs of the support 9 are fixed to the inner bottom wall of the shell 1. The purpose of arranging the support 9 is to keep the stability of the flow pipeline one 10, the flow pipeline two 11 and the communication pipe 12 connecting the two, keep the balance of the whole pipeline group, so as to facilitate the pipeline group and the cooling liquid flowing in the pipeline group to implement the heat dissipation work on the lithium battery module 2.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A lithium electronic power battery pack, comprising a shell (1) and a through hole (6) opened on the side surface of the shell (1), a lithium battery module (2) is arranged in the accommodating space of the shell (1), the lithium battery module (2) is composed of a plurality of lithium battery monomers, and a wiring port of the lithium battery module (2) is provided with a wire (3), the wire (3) is located above the lithium battery module (2), characterized in that: Both sides of the shell (1) are provided with end plates (4), the end plate (4) on one side is embedded with air cooling assembly (5), the inner cavity of the shell (1) and the lower side is provided with the pipeline group which can flow through the cooling liquid, the gap between the pipeline group is provided with flow force cooling assembly, the cooling work can be carried out in different positions of the pipeline group; The air cooling assembly (5) comprises a hollow casing (51), a fan assembly (52) is installed in the inner cavity of the casing (51), and the fan blades of the fan assembly (52) are opposite to the lithium battery module (2); The two end openings of the casing (51) are respectively provided with barrier net rack one (53) and barrier net rack two (54) for isolating impurities, the barrier net rack two (54) is located in the opposite space of the fan assembly (52) and the lithium battery module (2), the surface of the barrier net rack two (54) is provided with a flow guide frame (55), the flow guide frame (55) is funnel-shaped, and is used for dispersing the airflow generated by the operation of the fan assembly (52); The pipeline group comprises sequentially connected flow passage one (10), flow passage two (11) and communication pipe (12), the flow passage one (10), flow passage two (11) and communication pipe (12) are all disc-shaped, the flow passage one (10) and flow passage two (11) are located below the lithium battery module (2), the communication pipe (12) is installed between the flow passage one (10) and flow passage two (11), and the communication pipe (12) is clamped at the outer edge of the flow guide frame (55); The flow force cooling assembly comprises a support strip (13) fixed to the inner bottom wall of the shell (1), a channel for airflow passing through is formed in the support strip (13), and a plurality of heat dissipation fins (14) are arranged on the inner wall of the channel; the heat dissipation fins (14) extend to the gap between the flow passage one (10) and flow passage two (11); A plurality of linkage members (16) are detachably mounted on the support strip (13), and the linkage members (16) are opposite to the curved parts of the flow passage one (10) and flow passage two (11); The linkage member (16) comprises a rotating shaft (161) detachably mounted on the inner bottom wall of the support strip (13), a sleeve (162) is rotatably connected to the outer side of the rotating shaft (161), and a plurality of driven blades (163) are arranged on the outer surface of the sleeve (162) and can be driven to rotate by airflow.

2. The lithium electrokinetic battery pack of claim 1, wherein: The flow force cooling assembly further comprises a plurality of supporting plates (15) fixed to the top of the support strip (13), and the supporting plates (15) abut against the bottom of the lithium battery module (2).

3. The lithium electrokinetic battery pack of claim 1, wherein: The end plate (4) opposite to the air cooling assembly (5) is provided with parallel liquid inlet (7) and liquid outlet (8), and the liquid inlet (7) and liquid outlet (8) are respectively connected with the openings of the flow passage two (11) and flow passage one (10).

4. The lithium electrokinetic battery pack of claim 1, wherein: The small-diameter opening end of the flow guide frame (55) corresponds to the flow passage in the center of the surface of the barrier net rack two (54), forming a channel for airflow to pass through.

5. The lithium electrokinetic battery pack of claim 1, wherein: The outer surface of the flow pipeline one (10) and the flow pipeline two (11) is sleeved with the support (9), and the two symmetrical supporting legs of the support (9) are fixed to the inner bottom wall of the shell (1).

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