CN216671758U

CN216671758U - Cooling structure, battery module and battery package

Info

Publication number: CN216671758U
Application number: CN202123277558.9U
Authority: CN
Inventors: 康永生
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-06-03
Anticipated expiration: 2031-12-23

Abstract

The utility model provides a cooling structure, a battery module and a battery pack, wherein the cooling structure comprises: the two end plates are oppositely arranged and are positioned at two opposite ends of the electric core assembly, the two side plates are arranged between the two end plates, and two ends of each side plate are respectively connected with the two end plates; the two side plates are oppositely arranged and are respectively positioned at two opposite sides of the electric core component; wherein, be provided with the lateral part runner on each curb plate, be provided with the tip runner on the end plate, lateral part runner and tip runner intercommunication. The utility model solves the problem that the cooling structure of the battery module in the prior art is more complicated.

Description

Cooling structure, battery module and battery pack

Technical Field

The utility model relates to the field of batteries, in particular to a cooling structure, a battery module and a battery pack.

Background

Traditional liquid cooling system arranges the bottom or the side at the battery usually, and electric core and cooling system area of contact are on the small side, and the cooling effect is on the low side, can't satisfy the demand of big multiplying power under the charging condition control electric core temperature rise.

In addition, the cooling scheme of the battery module with three-side cooling has the advantages that the complexity of the liquid cooling system is increased due to the reasons that the arrangement pipelines are complex, the number of the used cold plates is large, and the like, the liquid cooling system occupies too much space in the battery pack, the arrangement difficulty of parts in the whole battery pack is increased, and the practical value of the design scheme is low.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a cooling structure, a battery module and a battery pack, and aims to solve the problem that the cooling structure of the battery module in the prior art is complex.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a cooling structure comprising: the two end plates are oppositely arranged and are positioned at the two opposite ends of the electric core component; the two side plates are arranged between the two end plates, and two ends of each side plate are respectively connected with the two end plates; the two side plates are oppositely arranged and are respectively positioned at two opposite sides of the electric core component; wherein, be provided with the lateral part runner on each curb plate, be provided with the tip runner on the end plate, lateral part runner and tip runner intercommunication.

Further, the cooling structure further includes: the bottom plate is connected with the end plate and is arranged on one side of the electric core assembly; wherein, the bottom runner is arranged on the bottom plate and communicated with the end runner.

Furthermore, each end flow passage comprises a first branch section, a second branch section and a third branch section, the first branch section and the second branch section are respectively communicated with the side flow passages of the two side plates in a one-to-one correspondence mode, and the third branch section is communicated with the bottom flow passage.

Further, the third branch section is arranged perpendicular to the first branch section and/or the second branch section.

Further, the central line of the first branch section and the central line of the second branch section are located on the same straight line.

Furthermore, a bottom inserting port is arranged in the third branch section, a bottom connector communicated with the bottom flow passage is arranged on the bottom plate, and the bottom connector is inserted in the bottom inserting port.

Furthermore, a side part inserting port is formed in the end plate, a side part connector communicated with the side part flow channel is arranged on the side plate, and the side part connector is inserted into the side part inserting port.

Further, the side plate is provided with a mounting boss, and the mounting boss is provided with a mounting hole so that the side plate can be mounted on a cross beam of the shell of the battery pack through a fastener penetrating through the mounting hole.

According to a second aspect of the present invention, there is provided a battery module comprising an electric core assembly, the battery module further comprising a cooling structure, the electric core assembly being disposed between two end plates of the cooling structure and between two side plates of the cooling structure.

According to a third aspect of the present invention, a battery pack is provided, which includes a housing and a battery module mounted on the housing, wherein the battery module is the above battery module.

By applying the technical scheme, the cooling structure comprises two end plates and two side plates, wherein the two end plates are oppositely arranged and are positioned at the two opposite ends of the electric core assembly, the two side plates are arranged between the two end plates, and the two ends of each side plate are respectively connected with the two end plates; the two side plates are oppositely arranged and are respectively positioned at two opposite sides of the electric core component; wherein, each side plate is provided with a side runner, the end plate is provided with an end runner, and the side runner is communicated with the end runner. The cooling structure of this application is applicable to the big multiplying power of battery and fills soon, the coolant liquid can flow to each side of electric core subassembly by lateral part runner and tip runner, so that the coolant liquid can cool off each side of electric core subassembly, runner in the end plate of this application can replace partial connecting line, the complexity of liquid cooling pipeline in the power battery package has significantly reduced, thereby cooling structure has been simplified, the shared space of liquid cooling system in the battery package has greatly been saved, optimize the layout of heat management spare part in the battery package, the comparatively complicated problem of cooling structure of the battery module among the prior art has been solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view showing the overall structure of an embodiment of a battery module according to the present invention;

FIG. 2 shows a schematic structural view of a side plate of an embodiment of the cooling structure according to the utility model;

FIG. 3 shows a first schematic plan view of a side panel according to the cooling structure of FIG. 2;

FIG. 4 shows a second schematic plan view of a side panel according to the cooling structure of FIG. 2;

FIG. 5 shows a third schematic plan view of a side plate according to the cooling structure of FIG. 2;

FIG. 6 shows a schematic structural view of an end plate of an embodiment of a cooling structure according to the present invention;

FIG. 7 shows a first schematic plan view of an end plate according to the cooling structure of FIG. 6;

FIG. 8 shows a second schematic plan view of an end plate according to the cooling structure of FIG. 6;

FIG. 9 shows a third schematic plan view of an end plate according to the cooling structure of FIG. 6;

fig. 10 is a plan view schematically showing the overall structure of an embodiment of a battery pack according to the present invention; and

fig. 11 shows a schematic flow path diagram of the bottom plate of the battery pack according to fig. 10.

Wherein the figures include the following reference numerals:

10. an end plate; 110. an end runner; 111. a first branching section; 112. a second branch section; 113. a third branch section; 101. a side socket; 100. an electrical core assembly; 20. a side plate; 200. a side joint; 220. mounting a boss; 221. mounting holes; 30. a base plate; 31. a first outlet; 32. a second outlet; 33. an inlet; 310. a bottom runner; 300. a bottom socket; 301. a bottom joint; 400. a cross member.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 11, the present invention provides a cooling structure, including: two end plates 10, the two end plates 10 being oppositely disposed and located at opposite ends of the electric core assembly 100; the two side plates 20 are arranged between the two end plates 10, and two ends of each side plate 20 are respectively connected with the two end plates 10; the two side plates 20 are oppositely arranged and respectively positioned at two opposite sides of the electric core assembly 100; side flow channels are arranged on the side plates 20, end flow channels 110 are arranged on the end plates 10, and the side flow channels are communicated with the end flow channels 110.

The cooling structure comprises two end plates 10 and two side plates 20, wherein the two end plates 10 are oppositely arranged and are positioned at two opposite ends of the electric core assembly 100, the two side plates 20 are both arranged between the two end plates 10, and two ends of each side plate 20 are respectively connected with the two end plates 10; the two side plates 20 are oppositely arranged and respectively positioned at two opposite sides of the electric core assembly 100; side flow channels are arranged on the side plates 20, end flow channels 110 are arranged on the end plates 10, and the side flow channels are communicated with the end flow channels 110. The cooling structure of this application is applicable to the big multiplying power of battery and fills soon, the coolant liquid can flow to each side of electric core subassembly 100 with tip runner 110 by the lateral part runner, so that the coolant liquid can cool off each side of electric core subassembly 100, runner in the end plate of this application can replace part connecting line, the complexity of liquid cooling pipeline in the power battery package has significantly reduced, thereby cooling structure has been simplified, the shared space of liquid cooling system in the battery package has greatly been saved, optimize the layout of heat management spare part in the battery package, the problem that the cooling structure of the battery module among the prior art is comparatively complicated is solved.

In an embodiment of the present invention, the cooling structure further comprises: the bottom plate 30, the bottom plate 30 is connected with the end plates, and the bottom plate 30 is arranged on one side of the electric core assembly 100; the bottom plate 30 is provided with a bottom runner 310, and the bottom runner 310 is communicated with the end runner 110. In the embodiment of the present invention, the end flow passage 110 inside the end plate 10 is a T-shaped passage.

Specifically, each end runner 110 includes a first branch section 111, a second branch section 112, and a third branch section 113, the first branch section 111 and the second branch section 112 respectively communicate with the side runners of the two side plates 20 in one-to-one correspondence, and the third branch section 113 communicates with the bottom runner 310.

Specifically, third branch section 113 is disposed perpendicular to first branch section 111 and/or second branch section 112.

In the embodiment of the present application, the extending direction of the third branch section 113 is the height direction of the cell assembly 100, and the extending direction of the first branch section 111 and the second branch section 112 is the length direction of a single cell component.

As shown in fig. 6, the center line of the first branch section 111 and the center line of the second branch section 112 are located on the same straight line.

Specifically, a bottom plug 300 is disposed in the third branch section 113, a bottom connector 301 communicated with the bottom flow channel 310 is disposed on the bottom plate 30, and the bottom connector 301 is inserted into the bottom plug 300. In an embodiment of the utility model, the bottom sub 301 is a male sub.

As shown in fig. 2 and 6, the end plate 10 is provided with a side socket 101, the side plate 20 is provided with a side connector 200 communicating with the side flow passage, and the side connector 200 is inserted into the side socket 101.

Wherein the side joints 200 are perpendicular to the panel surface of the side panel 20.

As shown in fig. 1 and 2, the side plate 20 is provided with a mounting boss 220, and the mounting boss 220 is provided with a mounting hole 221, so that the side plate 20 is mounted on the cross beam 400 of the case of the battery pack by a fastener inserted into the mounting hole 221.

In the related art, a cross member is required below the fixing position of the battery module.

In particular, the fastener is a fastening bolt.

Preferably, the side plate 20 is an extruded cooling plate.

In the embodiment of the present application, the side joint 200 is a male joint.

In the specific implementation process of the embodiment of the utility model, the side plate 20 of the utility model adopts an extrusion type cooling plate to replace the traditional side plate, and the strength of the extrusion type cooling plate can meet the use requirement of the side plate of the battery module; the inlet and outlet position of the lateral flow channel of the side plate 20 of the present application is used for welding (lateral connector 200) male connector, the lateral connector 200 is used for inserting the lateral interface 101 of the end flow channel 110 of the end plate 10, the non-cooling surface of the side plate 20 extrudes the mounting boss 220 and punches on the mounting boss 220, so as to install the side plate 20 on the beam of the lower case of the battery pack through the fastening bolt penetrating in the mounting hole 221, thereby fixing the battery module on the beam of the lower case.

In order to ensure that the air tightness of the liquid cooling system meets the requirement, a sealing and leakage-proof design is required to be made at the inner plugging position of the side plugging port 101 and the bottom plugging port 300 of the end plate 10.

Specifically, the outer edges of the side plates 20 are flush with the end plates, facilitating welding of the side plates 20 to the end plates 10.

This application is through inserting bottom interface 300 with the bottom joint, and lateral part connects 200 and inserts lateral part interface 101 to this intercommunication each end plate 10, curb plate 20 and the runner in the bottom plate 30, realize the cooling of each side and the bottom surface of whole packet of interior battery module, satisfied the control by temperature change demand of the big multiplying power of power battery fast charge in-process.

The utility model provides a battery module, which comprises a battery core assembly 100 and a cooling structure, wherein the battery core assembly 100 is arranged between two end plates 10 of the cooling structure and between two side plates 20 of the cooling structure.

The utility model also provides a battery pack which comprises a shell and the battery module arranged on the shell, wherein the battery module is the battery module.

Specifically, the battery pack includes a plurality of battery modules, and two end plates 10 are an end plate assembly, and two curb plates 20 are a curb plate assembly, all are provided with a set of end plate assembly and a set of curb plate assembly on each battery module, and curb plate assembly and end plate assembly set up one-to-one, and bottom plate 30 all is connected with the end plate assembly of each battery module.

In the embodiment of the present invention, as shown in fig. 10, the battery pack includes four battery modules, the bottom plate 30 is connected to the end plate assembly of each battery module, the bottom plate 30 has a plurality of bottom tabs 301, and each bottom tab 301 is inserted into a bottom socket 300 of a corresponding third branch section 113 in each end plate assembly to communicate the bottom flow channel 310 with the third branch section 113 and supply the cooling liquid to the end plate 10.

Specifically, the number of the bottom tabs 301 connected to the end plate assembly of each battery module is two, wherein one of the two bottom tabs 301 serves as an inlet and the other of the two bottom tabs 301 serves as an outlet for the circulation of the cooling fluid.

In the specific implementation process of the embodiment of the application, the cooling liquid in the liquid cooling system based on the cooling structure of the application flows at the bottom of the end plate 10 at one end of the battery module and flows into the bottom flow channel 310 of the battery module and the side flow channels of the side plates 20 at two sides respectively, so that a three-side cooling effect is achieved, and then flows together at the bottom of the end plate 10 at the other end of the battery module and flows out to converge into the outlet flow channel of the cooling system.

Specifically, the bottom runner 310 of the bottom plate 30 is a curved runner, the design of the bottom runner 310 needs to consider the trend and layout of the cooling liquid runners which are always in and out, and the runners among the battery modules are in a parallel connection mode, i.e. each battery module is designed to be in parallel connection with the main loop, so as to ensure the temperature uniformity of the whole pack and the pressure drop of the liquid cooling system; in order to facilitate the reasonableness of the flow distribution of each part, the flow length of the bottom flow channel 310 corresponding to each module area is kept consistent with the flow length of the side flow channel of the module side plate 20, that is, the side flow channel of the side plate 20 adopts a bent flow channel, which is approximately equal to 3 times the length of the battery module.

Specifically, the bottom runners 310 are distributed in a central symmetry manner, and the flow rate of the cooling liquid of each battery module is regulated and controlled in a grading manner, so that the uniformity of flow distribution is conveniently adjusted.

Specifically, the flow path length is the total length of the flow path through which the cooling liquid flows from the inlet to the outlet.

Optionally, the bottom runner 310 and the side runners are S-shaped runners.

As shown in fig. 11, the bottom plate 30 is designed to have a curved flow channel with one inlet and two outlets (i.e. the bottom flow channel 310 is an S-shaped flow channel), the bottom plate 30 includes a first outlet 31, a second outlet 32 and an inlet 33, the cooling liquid flows into the bottom flow channel 310 from the inlet 33 and flows out from the first outlet 31 and the second outlet 32, the first outlet 31 and the second outlet 32 are disposed at two sides of the inlet 33, and the first outlet 31 and the second outlet 32 are symmetrically disposed.

Wherein the first outlet 31, the second outlet 32 and the inlet 33 are all welded with male fittings.

Specifically, the bottom runner 310 includes a plurality of runner segments, each of which is communicated with each other, wherein at least some of the runner segments are disposed in parallel with each other, and at least some of the runner segments are used to communicate the runner segments that are parallel with each other.

As shown in fig. 10, the battery pack further includes a cross beam 400, the cross beam 400 is located at the lower housing of the battery pack, the cross beam 400 is arranged on the bottom plate 30, the threaded holes on the upper surface of the cross beam 400 are connected with the fixed side plates 20 through bolts, the bottom surface of the cross beam 400 fixes the bottom plate 30 through an FDS (spin-tapping riveting) process, so as to improve the flatness of the bottom plate 30, ensure the contact between the bottom plate 30 and the bottom of the battery cell, improve the cooling effect, and avoid using supporting foam, thereby reducing the influence of high temperature aging on the performance of the cooling system.

In conclusion, the end plate structure of this application contains inside runner, and this end plate can be used to assemble battery module, can further arrange simultaneously and assemble into power battery package. This end plate communicates module side cold drawing and bottom cold drawing through built-in runner, has saved pipeline and the joint that adopts in the traditional design scheme, and module overall structure keeps unanimous with traditional module, possesses general suitability. The cooling system can rapidly take away heat generated by the power battery in the quick charging process, so that the temperature of the power battery is maintained in a proper temperature range, and the problems of reduction of system charging multiplying power, overhigh battery core temperature and the like caused by over-temperature of a battery monomer are solved.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the cooling structure comprises two end plates 10 and two side plates 20, wherein the two end plates 10 are oppositely arranged and are positioned at two opposite ends of the electric core assembly 100, the two side plates 20 are both arranged between the two end plates 10, and two ends of each side plate 20 are respectively connected with the two end plates 10; the two side plates 20 are oppositely arranged and respectively positioned at two opposite sides of the cell assembly 100; side flow channels are arranged on the side plates 20, end flow channels 110 are arranged on the end plates 10, and the side flow channels are communicated with the end flow channels 110.

The cooling structure of this application is applicable to the big multiplying power of battery and fills soon, the coolant liquid can flow to each side of electric core subassembly 100 with tip runner 110 by the lateral part runner, so that the coolant liquid can cool off each side of electric core subassembly 100, runner in the end plate of this application can replace part connecting line, the complexity of liquid cooling pipeline in the power battery package has significantly reduced, thereby cooling structure has been simplified, the shared space of liquid cooling system in the battery package has greatly been saved, optimize the layout of heat management spare part in the battery package, the problem that the cooling structure of the battery module among the prior art is comparatively complicated is solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling structure, comprising:

two end plates (10), wherein the two end plates (10) are oppositely arranged and are positioned at two opposite ends of the electric core assembly (100);

the two side plates (20) are arranged between the two end plates (10), and two ends of each side plate (20) are respectively connected with the two end plates (10); the two side plates (20) are oppositely arranged and are respectively positioned at two opposite sides of the electric core assembly (100);

each side plate (20) is provided with a side flow channel, the end plate (10) is provided with an end flow channel (110), and the side flow channels are communicated with the end flow channels (110).

2. The cooling structure according to claim 1, characterized in that the cooling structure further comprises:

a base plate (30), wherein the base plate (30) is connected with the end plate (10), and the base plate (30) is used for being arranged on one side of the electric core assembly (100);

the bottom plate (30) is provided with a bottom runner (310), and the bottom runner (310) is communicated with the end runner (110).

3. The cooling structure according to claim 2, wherein each of the end runners (110) includes a first branch section (111), a second branch section (112), and a third branch section (113), the first branch section (111) and the second branch section (112) communicating with the side runners of the two side plates (20), respectively, in one-to-one correspondence, and the third branch section (113) communicating with the bottom runner (310).

4. A cooling structure according to claim 3, characterized in that the third branch section (113) is arranged perpendicular to the first branch section (111) and/or the second branch section (112).

5. A cooling structure according to claim 4, characterized in that the centre line of the first branch section (111) and the centre line of the second branch section (112) are located on the same straight line.

6. A cooling structure according to claim 3, wherein a bottom socket (300) is provided in the third branch section (113), and a bottom connector (301) communicating with the bottom flow channel (310) is provided on the bottom plate (30), and the bottom connector (301) is inserted into the bottom socket (300).

7. The cooling structure according to claim 1, wherein a side insertion port (101) is provided on the end plate (10), and a side joint (200) communicating with the side flow passage is provided on the side plate (20), the side joint (200) being inserted into the side insertion port (101).

8. The cooling structure according to claim 7, wherein the side plate (20) is provided with a mounting boss (220), and the mounting boss (220) is provided with a mounting hole (221) so that the side plate (20) can be mounted on a cross beam (400) of a case of a battery pack by a fastener inserted into the mounting hole (221).

9. The battery module comprises a battery core assembly (100) and is characterized by further comprising a cooling structure, wherein the battery core assembly (100) is arranged between two end plates (10) of the cooling structure and positioned between two side plates (20) of the cooling structure.

10. A battery pack comprising a case and a battery module mounted on the case, wherein the battery module is the battery module according to claim 9.