CN217239581U

CN217239581U - Quick radiating battery case structure

Info

Publication number: CN217239581U
Application number: CN202220922499.1U
Authority: CN
Inventors: 程明; 王浩; 王万胜; 周雷军; 薛历兴
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-08-19
Anticipated expiration: 2032-04-20

Abstract

The utility model discloses a battery shell structure capable of fast heat dissipation, which comprises a shell for accommodating a battery roll core, wherein a central tube is arranged in the shell, the interior of the central tube is mutually separated from the inner cavity of the shell, a baffle plate which is arranged along the axial direction is arranged in the tube of the central tube, the baffle plate divides the tube of the central tube into two parts to form a first pipeline and a second pipeline which are adjacent, a communication hole which is communicated with the first pipeline and the second pipeline is arranged at the top end of the baffle plate, the bottom ends of the first pipeline and the second pipeline are both provided with openings which are communicated with the exterior of the battery, a cooling liquid return circuit consisting of the first pipeline and the second pipeline is formed in the central tube, so that the external cooling liquid can circularly flow through the center of the battery to take away heat, the working temperature of the battery is reduced, the normal work of the battery can not be influenced, and the heat generated in the inner layer of the battery roll core can be quickly transferred to the exterior of the battery, avoid inside heat to pile up, improve the radiating efficiency, improve life.

Description

Quick radiating battery case structure

Technical Field

The utility model relates to a lithium ion battery technical field, concretely relates to quick radiating battery case structure.

Background

The temperature has an important influence on the lithium ion battery, the lithium precipitation of the negative electrode can be caused when the temperature is too low, and the side reaction of the positive and negative electrode interfaces is increased when the temperature is too high, so that the accelerated degradation of the lithium ion battery is caused. Lithium ion battery all can produce the heat at the in-process of charging and discharging, and the heat dissipation route that is located the battery roll core and is electric core center is longer, is difficult for giving off to the outside to because lithium ion battery internal battery diaphragm's heat conductivity is relatively poor, and the thermal resistance is great, has further increased the thermal degree of difficulty of scattering and disappearing in center, produces temperature gradient easily, influences the life and the safety of battery.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a quick radiating battery case structure, with the inside heat of electric core dispel fast, improve battery life and safety in utilization.

In order to solve the technical problem, the utility model discloses a battery case structure with rapid heat dissipation, which comprises a case for accommodating a battery roll core, wherein the case comprises a bottom plate and a side wall, a central tube is arranged in the case, after the battery roll core is placed in the case, the central tube is inserted into the battery roll core and is positioned at a roll needle position in the rolling process of the battery roll core, the top end of the central tube is sealed, the bottom end of the central tube is vertically arranged on the center of the bottom plate, so that the tube of the central tube is separated from the inner cavity of the case, a baffle plate arranged along the axial direction is arranged in the tube of the central tube, the baffle plate divides the tube of the central tube into two parts to form a first adjacent pipeline and a second adjacent pipeline, and a communication hole for communicating the first pipeline and the second pipeline is arranged at the top end of the baffle plate, the bottom of first pipeline with the second pipeline all is provided with the opening with the outside intercommunication of battery, forms the interface that outside coolant liquid flows in or flows out, realizes that the coolant liquid is in the round trip flows in the center tube, takes away the heat that the battery rolled up the core.

In above-mentioned quick radiating battery case structure, in the casing, through the center at the battery roll core promptly its book needle position when rolling up the system, increase a center tube, this center tube and casing inner chamber seal are isolated, and the coolant liquid that forms by first pipeline and second pipeline in the inside formation of center tube comes and goes the return circuit, make outside coolant liquid can follow battery center circulation and flow through, take away the heat, reduce the operating temperature of battery, can not influence the normal work of battery yet, thereby make the heat that the battery rolled up the core inlayer and produced can be transmitted electric core outside fast, avoid inside heat to pile up, the heat dissipation efficiency is improved, service life is prolonged. In addition, the center tube plays a role in positioning the battery roll core, and the battery assembly is convenient.

As the utility model discloses quick radiating battery case structure's improvement, this quick radiating battery case structure still includes the liquid cooling system, the liquid cooling system is used for injecting the coolant liquid in one pipeline in first pipeline and the second pipeline to retrieve from another pipeline and absorbed the thermal coolant liquid of battery roll core.

The liquid cooling system supplies cooling liquid to the pipeline inside the central tube from the outside of the battery to form a liquid cooling loop, and the battery is continuously cooled. When the battery is in groups, the general powerful battery all can adopt the coolant liquid to cool down, can insert the refrigerating system of battery module to the center tube through the pipeline on, constitute liquid cooling circulation system, simplify the structure.

As the utility model discloses another improvement of quick radiating battery housing structure, the center tube with the bottom plate is the integrated into one piece structure, first pipeline with the bottom of second pipeline all link up the bottom plate to form and correspond the opening. Preferably, the floor, side walls and central tube are integrally formed.

Through with center tube integrated into one piece on the bottom plate, make the inner chamber of center tube and the sealed isolated reliable of the inner chamber of casing to pipeline in the center tube link up the bottom plate, can the direct forming, also can form solid center tube earlier, runs through from the bottom again and punches, and production technology is simple, and it is easy to make.

Furthermore, a first mounting groove is formed in the bottom surface of the bottom plate, a first connecting pipe is arranged in the first mounting groove, and the bottom end opening of the first pipeline is led out from the side face of the bottom plate through the first connecting pipe.

Through first connecting pipe with first pipeline intercommunication to lead out the side of bottom plate, the outside liquid cooling system pipe connection of being convenient for is arranged, and in addition, place in first mounting groove of first connecting pipe embedding, not only the installation of being convenient for, moreover little to the overall structure influence of battery, can not produce spatial arrangement's influence to the battery in groups yet.

Similarly, a second mounting groove is formed in the bottom surface of the bottom plate, a second connecting pipe is arranged in the second mounting groove, and the bottom end opening of the second pipeline is led out from the side face of the bottom plate through the second connecting pipe.

Furthermore, the first mounting groove is in a reciprocating turning shape on the bottom surface of the bottom plate. First connecting pipe is the same with first mounting groove, also is reciprocal turn form to form the structure of similar liquid cooling board on the bottom surface of bottom plate, take the heat from the bottom of battery, further improve the radiating efficiency of battery, also realize the integration of structure, set up the occupation of liquid cooling board to the space alone when reducing in groups.

As the utility model discloses another improvement of quick radiating battery housing structure, the bottom plate the center tube with the lateral wall is split type structure, open at the bottom plate center has the installation blind hole, the installation blind hole is used for inlaying putting the bottom of center tube, the inside of bottom plate is in the both sides of baffle are provided with first trompil and second trompil respectively, the inner of first trompil with the opening intercommunication of first pipeline, and the outer end runs through the side of bottom plate, the inner of second trompil with the opening intercommunication of second pipeline, and the outer end runs through the side of bottom plate. Preferably, the first opening and the second opening are both straight hole structures.

Through with the bottom plate the center tube with the lateral wall sets up to split type structure, during production with the good center tube of shaping inlay put in the last surface mounting blind hole of bottom plate earlier to seal the two fixedly, adopt welded mode usually, it is fixed with bottom plate and lateral wall seal again, realize the center tube and make at the inside production of casing, through opening first trompil and second trompil in the inside of bottom plate, draw forth the side of bottom plate with first pipeline, second pipeline respectively, thereby realize keeping battery case's overall structure unchangeable, ingenious integrated liquid cooling circulating line.

Furthermore, the top of the center of the bottom plate is provided with a first boss, the first boss and the bottom plate are integrally formed, a through hole corresponding to the installation blind hole is formed in the first boss, the central tube is inserted and welded and fixed, and the bottom plate and the side wall are fixed through welding.

Through first boss and center tube fixed connection, increase with center tube laminating length, can suitably reduce the thickness of bottom plate, keep the stable vertical fixation of center tube.

Further, the opening of the first pipeline is a third opening hole formed in the bottom end of the outer side face, and after the central pipe is fixed, the third opening hole is aligned with the first opening hole.

The bottom end of the central tube is sealed, and the side wall of the bottom end of the central tube is provided with the hole to form the opening, so that the first hole is horizontally arranged, the processing is convenient, the manufacturing and the processing of the central tube are also convenient, and particularly, the central tube is formed by casting.

Furthermore, a groove is formed in the bottom surface of the installation blind hole, a protrusion is arranged on the bottom end surface of the central tube, after the central tube is fixed, the groove and the protrusion are mutually embedded and positioned, the inner end of the first opening hole is communicated with the opening of the first pipeline, and the inner end of the second opening hole is communicated with the opening of the second pipeline.

Through the mutually matched protrusion and groove structures, after the central tube is inserted into the installation blind hole, the central tube is quickly positioned, and the formation of a cooling liquid pipeline is ensured.

In conclusion, by adopting the quick heat dissipation battery shell structure, the heat at the center of the battery can be quickly led out, the heat accumulation is avoided, the working temperature of the battery is reduced, and the service life of the battery is prolonged. In addition, the size of the battery winding core is kept unchanged, the overall size of the battery core shell is not increased basically, and the heat dissipation efficiency is greatly improved while the energy density of the battery is ensured.

Drawings

In the drawings:

fig. 1 is an overall structure diagram of the present invention.

Fig. 2 is a section view of the central tube and the shell integrally formed.

Fig. 3 is a shell sectioning structure diagram of the utility model when the central tube and the shell are integrally formed.

Fig. 4 is a structure diagram of the first connecting pipe and the second connecting pipe when the central pipe and the housing are integrally formed.

Fig. 5 is a sectional structure view of the split structure of the center tube and the housing of the present invention.

Fig. 6 is a shell sectioning structure diagram of the split structure of the central tube and the shell of the present invention.

Fig. 7 is a structural view of the center tube when the center tube and the housing are separated.

In the figure, 1, a battery winding core; 2. a housing; 21. a base plate; 211. installing blind holes; 212. a first opening; 213. a second opening; 214. a first mounting groove; 215. a second mounting groove; 216. a groove; 22. a side wall; 23. a first boss; 3. a central tube; 31. a partition plate; 32. a first pipe; 33. a second conduit; 34. a communicating hole; 35. a third opening; 36. a protrusion; 37. a fourth opening; 41. a first connecting pipe; 42. a second connecting pipe.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

Fig. 1-7 show a battery case structure for rapid heat dissipation according to the present invention. As shown in fig. 1 and fig. 2, the battery casing structure with rapid heat dissipation comprises a casing 2 for accommodating a battery winding core 1, the casing 2 comprises a bottom plate 21 and a side wall 22, a central tube 3 is arranged in the casing 2, after the battery winding core 1 is placed in the casing 2, the central tube 3 is inserted into the battery winding core 1 and is located at a winding needle position in the winding process of the battery winding core 1, the top end of the central tube 3 is sealed, and the bottom end of the central tube 3 is vertically arranged on the center of the bottom plate 21, so that the inside of the central tube 3 is separated from the inner cavity of the casing 2, a partition plate 31 arranged along the axial direction is arranged in the tube of the central tube 3, the partition plate 31 divides the inside of the central tube 3 into two parts to form a first tube 32 and a second tube 33 which are adjacent, a communication hole 34 for communicating the first tube 32 and the second tube 33 is arranged at the top end of the partition plate 31, openings for communicating the outside of the first tube 32 and the second tube 33 are arranged at the bottom end of the first tube 32 and the second tube 33, an interface for the inflow or outflow of external cooling liquid is formed, so that the cooling liquid flows back and forth in the central tube 3 and takes away the heat of the battery winding core 1.

Optionally, the battery case structure with rapid heat dissipation further includes a liquid cooling system, and the liquid cooling system is configured to inject a cooling liquid into one of the first pipe 32 and the second pipe 33, and to recover the cooling liquid absorbing heat of the battery roll core 1 from the other pipe. The liquid cooling system provides cooling liquid from the outside of the battery to the pipeline inside the central tube 3 to form a liquid cooling loop, and the battery center is continuously cooled. When the battery is in groups, the general powerful battery all can adopt the coolant system to cool off, can insert the refrigerating system of battery module to central tube 3 through the pipeline on, constitute liquid cooling circulation system, simplify the structure.

Optionally, the diameter of the central tube 3 is the same as the diameter of the winding needle for manufacturing the battery winding core 1, and the height of the central tube 3 is the same as the height of the battery winding core 1. The size of the battery roll core 1 is kept unchanged, the overall size of the shell 2 is not increased basically, and the heat dissipation efficiency is greatly improved while the energy density of the battery is ensured.

During the use, at the internal battery of casing 2 and roll up core 1, center tube 3 inserts the coil needle position when the core 1 book of battery is made, fixes a position it, easy to assemble. And the external liquid cooling system injects low-temperature cooling liquid into the bottom opening of the first pipeline 32, the cooling liquid flows upwards into the second pipeline 33 through the communicating hole 34 and then flows out from the bottom opening of the second pipeline 33, and a cooling liquid return circuit is formed to take away heat, reduce the working temperature of the battery and not influence the normal work of the battery.

As shown in fig. 3, the central tube 3 and the bottom plate 21 are integrally formed, and the bottom ends of the first and

second conduits

32 and 33 penetrate the bottom plate 21 and form corresponding openings. Preferably, the bottom plate 21, the side walls 22 and the central tube 3 are integrally formed.

With center tube 3 integrated into one piece on bottom plate 21, make the inner chamber of center tube 3 and the sealed isolated reliable of the inner chamber of casing 2 to the pipeline in the center tube 3 link up bottom plate 21, can the direct forming, also can form solid center tube 3 earlier, runs through from the bottom again and punches, and production technology is simple, and it is easy to make

For connecting with the pipe of the liquid cooling system, as shown in fig. 3 and 4, a first mounting groove 214 is provided on the bottom surface of the bottom plate 21, a first connecting pipe 41 is provided in the first mounting groove 214, and the first connecting pipe 41 leads out the bottom end opening of the first pipe 32 from the side surface of the bottom plate 21.

First connecting pipe 41 acts as the coupling, inserts and realizes the intercommunication with the opening of first pipeline 32 to draw forth the side of bottom plate 21, the outside liquid cooling system pipe connection of being convenient for arranges, in addition, places in first connecting pipe 41 main part embedding first mounting groove 214, not only is convenient for install, and is little to the overall structure influence of battery moreover, also can not produce spatial arrangement's influence to the battery in groups.

Similarly, a second mounting groove 215 is formed in the bottom surface of the bottom plate 21, a second connecting pipe 42 is disposed in the second mounting groove 215, and the second connecting pipe 42 leads the bottom opening of the second duct 33 out of the side surface of the bottom plate 21.

Alternatively, the first mounting groove 214 is formed in a reciprocating zigzag shape on the bottom surface of the base plate 21. The first connecting pipe 41 is also in a reciprocating turning shape like the first mounting groove 214, so that a structure similar to a liquid cooling plate is formed on the bottom surface of the bottom plate 21, heat is taken from the bottom of the battery, and the heat dissipation effect of the battery is further improved

As shown in fig. 5, the structure of the central tube 3 and the bottom plate 21 is designed to be split. Bottom plate 21, center tube 3 and lateral wall 22 are split type structure, and open at bottom plate 21 center has installation blind hole 211, and installation blind hole 211 is used for inlaying the bottom of putting center tube 3, and the inside of bottom plate 21 is provided with first trompil 212 and second trompil 213 respectively in the both sides of baffle 31, and the inner of first trompil 212 communicates with the opening of first pipeline 32, and the side of bottom plate 21 is run through to the outer end, and the inner of second trompil 213 communicates with the opening of second pipeline 33, and the side of bottom plate 21 is run through to the outer end. Preferably, the first and

second openings

212, 213 are straight hole structures.

With bottom plate 21, center tube 3 and lateral wall 22 set up to split type structure, during production earlier with the good center tube 3 of shaping inlay in the last surface mounting blind hole 211 of bottom plate 21, and seal the two fixedly, adopt welded mode usually, it is sealed fixed with bottom plate 21 and lateral wall 22 again, realize the manufacturing of center tube 3 in casing 2 inside, through opening first trompil 212 and second trompil 213 in the inside of bottom plate 21, respectively with first pipeline 32, the side of bottom plate 21 is drawn forth to second pipeline 33, thereby realize keeping battery housing 2's overall structure unchangeable, ingenious integrated liquid cooling circulating line.

Optionally, the top of the center of the bottom plate 21 is provided with a first boss 23, the first boss 23 and the bottom plate 21 are integrally formed, a through hole corresponding to the mounting blind hole 211 is formed in the first boss 23, the central tube 3 is inserted and welded and fixed, and the bottom plate 21 and the side wall 22 are fixed by welding. First boss 23 and center tube 3 fixed connection increase with center tube 3 laminating length, can suitably reduce the thickness of bottom plate 21, keep the stable vertical fixation of center tube 3.

As shown in fig. 5 and 7, the opening of the first pipe 32 is a third opening hole 35 provided at the bottom end of the outer side surface, and after the center pipe 3 is fixed, the third opening hole 35 is aligned with the first opening hole 212. Likewise, the bottom end of the second pipe 33 is provided with a fourth opening 37

The bottom end of the center tube 3 is sealed and an opening is formed in the bottom end side wall 22 of the center tube 3, so that the first opening 212 is horizontally arranged for easy processing and also for easy manufacturing of the center tube 3, especially by casting.

As shown in fig. 6 and 7, the bottom surface of the blind mounting hole 211 is provided with a groove 216, the bottom end surface of the center tube 3 is provided with a protrusion 36, and after the center tube 3 is fixed, the groove 216 and the protrusion 36 are fitted and positioned with each other, so that the inner end of the first opening hole 212 communicates with the opening of the first pipe 32, and the inner end of the second opening hole 213 communicates with the opening of the second pipe 33.

The mutually matched structure of the bulge 36 and the groove 216 can quickly position the central tube 3 after the central tube 3 is inserted into the installation blind hole 211, so that the formation of a cooling liquid pipeline is ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various changes, modifications and equivalents can be made to the embodiments of the invention after reading the present invention, and such changes, modifications and equivalents are within the scope of the claims.

Claims

1. The utility model provides a quick radiating battery case structure, characterized in that, is including casing (2) that is used for holding battery to roll up core (1), casing (2) are including bottom plate (21) and lateral wall (22), be provided with center tube (3) in casing (2), battery rolls up core (1) and puts into casing (2) inside back, center tube (3) insert in battery rolls up core (1), and is located battery rolls up the book needle position of core (1) system in-process, the top of center tube (3) is sealed, just the bottom of center tube (3) is located perpendicularly on bottom plate (21) the center, makes the intraductal with the inner chamber of casing (2) of center tube (3) separate each other, be provided with one in the pipe of center tube (3) along axial arrangement's baffle (31), baffle (31) will the intraductal one of center tube (3) is divided into two, form adjacent first pipeline (32) and second pipeline (33), open the top of baffle (31) has the intercommunication first pipeline (32) with intercommunicating pore (34) of second pipeline (33), first pipeline (32) with the bottom of second pipeline (33) all is provided with the opening with the outside intercommunication of battery, forms the interface that outside coolant liquid flows in or flows out, realizes that the coolant liquid is in come and go to flow in center tube (3), takes away the heat that battery coiled core (1).

2. A rapid heat dissipation battery case structure according to claim 1, further comprising a liquid cooling system for injecting a coolant into one of the first conduit (32) and the second conduit (33) and recovering the coolant absorbing heat from the battery jelly roll (1) from the other conduit.

3. The battery shell structure capable of rapidly dissipating heat according to claim 1, wherein the diameter of the central tube (3) is the same as the diameter of a winding pin for manufacturing the battery winding core (1), and the height of the central tube (3) is the same as the height of the battery winding core (1).

4. A battery casing structure with rapid heat dissipation according to claim 1 or 2, wherein the central tube (3) and the bottom plate (21) are of an integral structure, and the bottom ends of the first and second ducts (32, 33) penetrate the bottom plate (21) and form the corresponding openings.

5. The battery casing structure capable of rapidly dissipating heat according to claim 4, wherein a first mounting groove (214) is formed on a bottom surface of the bottom plate (21), a first connecting pipe (41) is disposed in the first mounting groove (214), and the first connecting pipe (41) leads a bottom end opening of the first pipe (32) out of a side surface of the bottom plate (21).

6. The battery case structure for rapid heat dissipation according to claim 5, wherein the first mounting groove (214) is formed in a reciprocating zigzag shape on the bottom surface of the base plate (21).

7. The battery shell structure capable of dissipating heat quickly according to claim 1 or 2, wherein the bottom plate (21), the center tube (3) and the side wall (22) are of a split structure, a blind installation hole (211) is formed in the center of the bottom plate (21), the blind installation hole (211) is used for embedding the bottom end of the center tube (3), a first opening hole (212) and a second opening hole (213) are respectively formed in the bottom plate (21) on two sides of the partition plate (31), the inner end of the first opening hole (212) is communicated with the opening of the first pipe (32), the outer end of the first opening hole penetrates through the side surface of the bottom plate (21), the inner end of the second opening hole (213) is communicated with the opening of the second pipe (33), and the outer end of the second opening hole penetrates through the side surface of the bottom plate (21).

8. The battery shell structure capable of rapidly dissipating heat according to claim 7, wherein a first boss (23) is disposed at a central top of the bottom plate (21), the first boss (23) is integrally formed with the bottom plate (21), a through hole corresponding to the blind mounting hole (211) is formed in the first boss (23) for inserting and welding the central tube (3), and the bottom plate (21) and the side wall (22) are fixed by welding.

9. A battery casing structure with rapid heat dissipation according to claim 7, characterized in that the opening of the first duct (32) is a third opening (35) disposed at the bottom end of the outer side surface, and after the central tube (3) is fixed, the third opening (35) is aligned with the first opening (212).

10. The battery shell structure capable of dissipating heat quickly as claimed in claim 7, wherein a groove (216) is formed on the bottom surface of the blind mounting hole (211), a protrusion (36) is formed on the bottom end surface of the center tube (3), after the center tube (3) is fixed, the groove (216) and the protrusion (36) are engaged with each other and positioned, and the inner end of the first opening (212) is communicated with the opening of the first pipe (32), and the inner end of the second opening (213) is communicated with the opening of the second pipe (33).