CN116315277A - A lithium electronic power battery pack - Google Patents

Abstract

The invention discloses a lithium-ion power battery pack, which relates to the technical field of power battery packs and comprises a shell and a through hole formed in the side face of the shell, wherein a lithium battery module is arranged in a containing space of the shell, the lithium battery module consists of a plurality of lithium battery monomers, wiring ports of the lithium battery module are provided with wires, the wires are positioned above the lithium battery module, two sides of the shell are provided with end plates, an air cooling assembly is embedded on one side of each end plate, and a pipeline group capable of circulating cooling liquid is arranged in an inner cavity of the shell and is arranged below the inner cavity.

Description

A lithium electronic power battery pack

technical field

The invention relates to the technical field of power battery packs, in particular to a lithium electronic power battery pack.

Background technique

Power lithium-ion battery refers to a lithium-ion battery with a capacity of more than 3AH. At present, it generally refers to a lithium-ion battery that can be discharged to drive equipment, equipment, models, vehicles, etc. Due to different use objects, the capacity of the battery may not reach The level of the unit AH. The battery pack of an electric vehicle is mainly composed of battery cells and modules. A battery cell refers to a single independent lithium battery. Combining multiple battery cells together becomes a module, and then combining multiple modules Finally, a battery pack is formed.

In the actual application process, the existing lithium electronic power battery packs mostly use liquid cooling to dissipate heat from the lithium battery module inside the battery pack to reduce the temperature during charging and discharging of the power battery pack and ensure the power battery However, most of the existing coils used to circulate coolant are installed inside the battery pack. If the operating temperature of the battery pack rises, the temperature of the coil body will also rise, which will easily lead to its The coolant circulating inside heats up, reducing cooling efficiency.

Contents of the invention

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

In order to achieve the above purpose, the present application provides the following technical solutions: a lithium electronic power battery pack, including a casing and a through hole opened on the side of the casing, a lithium battery module is arranged in the accommodation space of the casing, and the The lithium battery module is composed of a plurality of lithium battery cells, and the wiring port of the lithium battery module is provided with wires, the wires are located above the lithium battery module, and end plates are provided on both sides of the housing, located at An air-cooling assembly is embedded on the end plate on one side, and a pipe group through which cooling liquid can circulate is provided in the inner cavity of the housing and below, and a flow cooling assembly is provided inside the gap of the pipe group, which can be located at Different positions of the pipeline group implement cooling work.

Further, the air-cooling assembly includes a hollow casing, a fan assembly is installed in the inner cavity of the casing, and the fan blades of the fan assembly face the lithium battery module.

The openings at both ends of the casing are respectively equipped with a barrier grid frame 1 and a barrier grid frame 2 to isolate impurities. The barrier grid frame 2 is located in the relative space between the fan assembly and the lithium battery module. The barrier grid The surface of the frame two is provided with a guide frame, which is arranged in a funnel shape, and is used to disperse the air flow generated by the operation of the fan assembly.

Further, the pipeline group includes a circulation pipeline 1, a circulation pipeline 2 and a communication pipe connected in sequence, and the circulation pipeline 1, the circulation pipeline 2 and the communication pipe are arranged in a coil shape, and the circulation pipeline The pipeline 1 and the circulation pipeline 2 are both located under the lithium battery module, the communication pipe is installed between the circulation pipeline 1 and the circulation pipeline 2, and the communication pipe is clamped on the outer edge of the flow guide frame.

Further, the flow cooling assembly includes a support bar fixed on the inner bottom wall of the casing, and a channel for air flow is opened on the support bar, and a plurality of sets of cooling fins are provided on the inner wall of the channel, so that The cooling fins extend to the gap between the pipe bodies of the first circulation pipeline and the second circulation pipeline.

Multiple groups of linkage pieces are detachably installed on the support bar, and the linkage pieces are facing the bending parts of the pipe bodies of the first flow line and the second flow line.

Further, the linkage includes a rotating shaft detachably installed on the inner bottom wall of the support bar, the outer side of the rotating shaft is rotatably connected to a sleeve, and the outer surface of the sleeve is surrounded by a plurality of rotating shafts that can be driven by the airflow. follower blade.

Further, the flow cooling assembly also includes a plurality of support plates fixed on the top of the support bar, and the support plates are against the bottom of the lithium battery module.

Further, the end plate located on the opposite side of the air-cooled assembly is provided with parallel liquid inlets and liquid outlets, and the liquid inlets and liquid outlets are respectively connected to the openings of the second flow line and the first flow line. docking installation.

Further, the opening end with a smaller diameter of the air guide frame corresponds to the flow opening at the center of the two surfaces of the barrier grid, forming a channel through which the airflow can pass.

Further, the outer surfaces of the first circulation pipeline and the second circulation pipeline are covered with supports, and the two symmetrical legs of the supports are fixed to the inner bottom wall of the casing.

In sum, technical effect and advantage of the present invention:

The invention has a reasonable structure, combined with the existing air-cooled components of the power battery pack and the pipeline group in which the coolant circulates, it can be located at different positions of the pipeline group to implement comprehensive and efficient cooling work, and quickly reduce the temperature of the pipeline in which the coolant circulates , to reduce the impact of the high-temperature environment inside the power battery pack on the tube assembly used for liquid cooling. Furthermore, after reducing the temperature of the tube, the temperature rise rate of the cooling liquid circulating inside can be effectively reduced, and the cooling efficiency of the cooling liquid in the process of circulation and cooling is improved, which is beneficial to the long-term use of the cooling liquid.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic structural diagram of the second viewing angle of the present invention.

Fig. 3 is a schematic diagram of the cut-away structure of the bottom of the casing of the present invention.

Fig. 4 is a schematic diagram of the location and structure of the lithium battery module and the casing of the present invention.

Fig. 5 is a schematic diagram of the positions and structures of the flow cooling component, the air cooling component and the pipeline group in the present invention.

Fig. 6 is a structural schematic diagram of the second viewing angle of the flow cooling component, the air cooling component and the pipeline group of the present invention.

Fig. 7 is a schematic structural diagram of the air-cooled assembly of the present invention.

Fig. 8 is a schematic structural diagram of the flow cooling assembly of the present invention.

Fig. 9 is a schematic diagram of the linkage of the present invention.

In the figure: 1. shell; 2. lithium battery module; 3. wire; 4. end plate; 5. air cooling component; 51. casing; 52. fan assembly; 55, flow guide frame; 6, through hole; 7, liquid inlet; 8, liquid outlet; 9, support; 10, circulation pipeline one; 11, circulation pipeline two; 12, Unicom 13. Support bar; 14. Radiating fin; 15. Support plate; 16. Linkage piece; 161. Rotating shaft; 162. Sleeve; 163. Follower vane.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment 1: Referring to a lithium electronic power battery pack shown in Fig. 1 and Fig. 2, it includes a case 1 and a through hole 6 opened on the side of the case 1, and a lithium battery module is arranged in the accommodation space of the case 1. Group 2, the lithium battery module 2 is composed of a plurality of 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, and the two sides of the casing 1 are provided with End plate 4, line inserts are installed on the end plate 4, an air cooling component 5 is embedded on the end plate 4 on one side, and a pipeline group through which cooling liquid can circulate is arranged in the inner cavity of the housing 1, and the pipeline group It is arranged in a coil shape, and can quickly reduce the temperature inside the entire power battery pack through air cooling and liquid cooling.

When the power battery pack is in a high temperature environment, affected by the temperature, the temperature of the pipeline group will also increase. In order to reduce the temperature of the pipeline group, combine the existing air-cooled component 5 of the power battery pack and the pipeline with the cooling fluid Group, the inner side of the pipe group gap is provided with flow cooling components, which can be located at different positions of the pipe group to perform cooling work.

As shown in FIG. 7 , the air cooling assembly 5 includes a hollow casing 51 , and a fan assembly 52 is installed in the inner cavity of the casing 51 , and the fan blades of the fan assembly 52 face the lithium battery module 2 . The airflow generated when the fan assembly 52 is in operation can contact the lithium battery module 2 to reduce the temperature of the lithium battery module 2 during charging and discharging.

The openings at both ends of the casing 51 are respectively equipped with a barrier grid frame 1 53 and a barrier grid frame 2 54 to isolate impurities. The barrier grid frame 2 54 is located in the relative space between the fan assembly 52 and the lithium battery module 2, and the barrier grid A deflector 55 is provided on the surface of the second frame 54 , and the deflector 55 is arranged in a funnel shape for dispersing the air flow 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 can fully contact the lithium battery module 2, and improve the efficiency of heat dissipation.

As shown in Fig. 3, Fig. 5 and Fig. 6, the pipeline group includes a circulation pipeline 10, a circulation pipeline 2 11 and a communication pipe 12 connected in sequence, a circulation pipeline 10, a circulation pipeline 2 11 and a communication pipe 12 are arranged in the shape of coils. When the cooling liquid flows in the circulation pipeline 10 and the circulation pipeline 2 11, the curved pipeline structure can easily reduce the speed of the cooling liquid, so as to fully implement the heat dissipation work on the lithium battery module 2 .

Circulation pipeline 1 10 and circulation pipeline 2 11 are located below the lithium battery module 2, and the communication pipe 12 is installed between the circulation pipeline 10 and the circulation pipeline 2 11, and the communication pipe 12 is clipped to the flow guide frame 55 at the outer edge. The cooling liquid circulating inside the first circulation pipeline 10 , the second circulation pipeline 11 and the communication pipe 12 can take away a large amount of heat generated by the operation of the lithium battery module 2 and play a cooling role. Because the connecting pipe 12 is clamped on the outer edge of the air guide frame 55, when the fan assembly 52 is running, the airflow dispersed by the air guide frame 55 can pass through the connecting pipe 12, and the pipe body of the connecting pipe 12 can dissipate heat.

Example 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 pipeline group will also increase due to the influence of temperature. In order to reduce the temperature of the pipeline group, combined with power The existing air-cooling assembly 5 of the battery pack is also provided with a flow cooling assembly. The flow cooling assembly includes a support bar 13 fixed to the inner bottom wall of the housing 1, and the support bar 13 is provided with a channel for air flow to pass through. , the inner wall of the channel is provided with multiple sets of cooling fins 14, and the cooling fins 14 extend to the pipe body gap of the first flow line 10 and the second flow line 11. The surface of the heat sink 14 is coated with a layer of heat-conducting silicon grease, and the heat around the circulation line 10 and the flow line 2 11 is effectively conducted to the heat sink 14, and then dissipated into the surrounding air through the heat sink 14.

There are multiple groups of linkage pieces 16 detachably installed on the support bar 13, and the linkage pieces 16 are facing the bending parts of the first flow pipeline 10 and the second flow pipeline 11. The purpose of being provided with the linkage 16 at its bent part is to rotate under the action of the airflow generated by the operation of the fan assembly 52, to further generate airflow, and to contact the pipe body of the circulation pipeline 10 and the circulation pipeline 2 11, and the fan assembly 52 On the premise that the assembly 52 is in operation, the heat dissipation efficiency of the first circulation pipeline 10 and the second circulation pipeline 11 can be effectively improved. Combined with the operation of the fan assembly 52 to generate the flow of air in contact with the communication pipe 12, the flow force cooling component is close to different positions of the first circulation pipeline 10 and the second circulation pipeline 11, so as to fully dissipate heat for the pipeline group.

As shown in Figure 8 and Figure 9, the linkage 16 includes a rotating shaft 161 detachably installed on the inner bottom wall of the support bar 13, the outer side of the rotating shaft 161 is connected to the sleeve 162, and the outer surface of the sleeve 162 is surrounded by a plurality of A follower vane 163 that can be driven to rotate by the airflow. When the fan assembly 52 is in operation, the airflow can pass through the channel on the surface of the support bar 13 and contact the linkage piece 16. The follower blades 163 in the linkage piece 16 are arranged in an arc shape, and under the action of the airflow, a rotational displacement can be generated. A follower vane 163 drives the sleeve 162 to rotate around the rotating shaft 161 .

The airflow generated by the rotation of the moving vane 163 can contact the pipeline group, and the airflow generated by the rotation can increase the air flow near the pipeline group, quickly reduce the temperature of the circulation pipeline 10 and the circulation pipeline 2 11, and reduce the power. The impact of the high temperature environment inside the battery pack on the circulation pipeline 10 and the circulation pipeline 211.

Further, after reducing the temperature of the circulation pipeline 10 and the circulation pipeline 2 11, the temperature rise rate of the cooling liquid circulating inside the two can be effectively reduced, and the cooling efficiency of the cooling liquid in the process of circulation and cooling is improved. , which is conducive to the long-term use of coolant.

As shown in Figure 3 and Figure 5, the flow cooling assembly also includes a plurality of supporting plates 15 fixed on the top of the support bar 13, the supporting plates 15 are offset against the bottom of the lithium battery module 2, and the purpose of the supporting plates 15 is To maintain the stability of the entire lithium battery module 2, it has the function of supporting and positioning it. The circulation pipeline 1 10 and the circulation pipeline 2 11 are located under the supporting plate 15 and offset against the supporting plate 15, and the lithium battery module 2 is implemented Liquid cooling works.

As shown in Fig. 2 and Fig. 6, a parallel liquid inlet 7 and a liquid outlet 8 are arranged on the end plate 4 on the opposite side of the air-cooled assembly 5, and the liquid inlet 7 and the liquid outlet 8 are respectively connected with the circulation pipeline 2. 11. The opening of the circulation pipeline 10 is butt-connected and installed, and the purpose of being provided with a liquid inlet 7 and a liquid outlet 8 is to facilitate the connection of an external cooling liquid pipeline, so as to form a passage for cooling liquid to flow in and out.

As shown in Fig. 5 and Fig. 7, the opening end of the deflector frame 55 with a smaller diameter corresponds to the flow opening at the center of the surface of the barrier grid frame 2 54, forming a passage for airflow to pass through. When the fan assembly 52 is running, part of the airflow still reaches the surface of the lithium battery module 2 directly, and the airflow touches the center of the lithium battery module 2 to ensure the cooling effect.

As shown in Figure 6, the outer surfaces of the circulation pipeline 10 and the circulation pipeline 2 11 are covered with a support 9, and the two symmetrical legs of the support 9 are fixed on the inner bottom wall of the housing 1, and the support 9 is provided. The purpose is to maintain the stability of the first flow line 10, the second flow line 11, and the connecting pipe 12 connecting the two, and keep the balance of the whole set of pipes, so that the set of pipes and the cooling fluid circulating inside them are relatively stable. The lithium battery module 2 implements heat dissipation.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall include Within the protection scope of the present invention.

Claims (9)

1. The utility model provides a lithium-ion power battery package, includes casing (1) and sets up in through-hole (6) of casing (1) side, be provided with lithium battery module (2) in the accommodation space of casing (1), lithium battery module (2) are constituteed by a plurality of lithium cell monomers, and the wiring port of lithium battery module (2) is provided with wire (3), wire (3) are located the top of lithium battery module (2), its characterized in that: the cooling device is characterized in that end plates (4) are arranged on two sides of the shell (1), an air cooling assembly (5) is embedded on the end plates (4) and located on one side, a pipeline group capable of circulating cooling liquid is arranged in an inner cavity of the shell (1) and below the inner cavity, a flow force cooling assembly is arranged on the inner side of a gap of the pipeline group, and cooling work can be implemented at different positions of the pipeline group.

2. A lithium-ion power battery pack according to claim 1, wherein: the air cooling assembly (5) comprises a hollow shell (51), a fan assembly (52) is arranged in the inner cavity of the shell (51), and fan blades of the fan assembly (52) are opposite to the lithium battery module (2);

the separation net rack I (53) and the separation net rack II (54) are respectively installed at openings at two ends of the shell (51) so as to isolate impurities, the separation net rack II (54) is located in a relative space between the fan assembly (52) and the lithium battery module (2), a flow guide frame (55) is arranged on the surface of the separation net rack II (54), and the flow guide frame (55) is arranged in a funnel shape and used for dispersing air flow generated by operation of the fan assembly (52).

3. A lithium-ion power battery pack according to claim 2, wherein: the pipeline group is including circulation pipeline one (10), circulation pipeline two (11) and the communicating pipe (12) that are connected in proper order, circulation pipeline one (10), circulation pipeline two (11) and communicating pipe (12) all are coil-type setting, circulation pipeline one (10), circulation pipeline two (11) all are located the below of lithium cell module (2), communicating pipe (12) are installed between circulation pipeline one (10), circulation pipeline two (11), and communicating pipe (12) joint in the outer fringe department of water conservancy diversion frame (55).

4. A lithium-ion power battery pack according to claim 3, wherein: the flow force cooling assembly comprises a supporting bar (13) fixed on the inner bottom wall of the shell (1), a channel through which air flow can pass is formed in the supporting bar (13), a plurality of groups of cooling fins (14) are arranged on the inner wall of the channel, and the cooling fins (14) extend to the gaps of the first pipeline (10) and the second pipeline (11) of the circulation pipeline;

a plurality of groups of linkage pieces (16) are detachably arranged on the support bar (13), and the linkage pieces (16) are opposite to the bending parts of the pipe bodies of the first circulating pipeline (10) and the second circulating pipeline (11).

5. The lithium-ion power battery pack of claim 4, wherein: the linkage piece (16) comprises a rotating shaft (161) which is detachably arranged on the inner bottom wall of the supporting bar (13), a sleeve (162) is rotatably connected to the outer side of the rotating shaft (161), and a plurality of follow-up blades (163) which can be driven to rotate by air flow are arranged on the outer surface of the sleeve (162) in a surrounding mode.

6. The lithium-ion power battery pack of claim 4, wherein: the flow force cooling assembly further comprises a plurality of supporting plates (15) fixed at the tops of the supporting bars (13), and the supporting plates (15) are propped against the bottoms of the lithium battery modules (2).

7. A lithium-ion power battery pack according to claim 3, wherein: the end plate (4) positioned on the opposite side of the air cooling assembly (5) is provided with a liquid inlet (7) and a liquid outlet (8) which are parallel, and the liquid inlet (7) and the liquid outlet (8) are respectively in butt joint with openings of a second circulating pipeline (11) and a first circulating pipeline (10).

8. A lithium-ion power battery pack according to claim 2, wherein: the smaller opening end of the guide frame (55) corresponds to the flow opening in the center of the surface of the second blocking net frame (54) to form a channel through which air flows.

9. A lithium-ion power battery pack according to claim 3, wherein: the outer surfaces of the first circulating pipeline (10) and the second circulating pipeline (11) are sleeved with a support (9), and two symmetrical supporting legs of the support (9) are fixed on the inner bottom wall of the shell (1).

Images