CN210006791U

CN210006791U - Casing and power battery package

Info

Publication number: CN210006791U
Application number: CN201921004631.5U
Authority: CN
Inventors: 王路; 唐丽娟; 任荣彬; 单小林; 李舒业; 刘建华; 魏艳彬; 叶鹏
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-01-31
Anticipated expiration: 2029-06-28

Abstract

The utility model relates to a power battery wraps technical field, in particular to kinds of casings and power battery package, casing (1) include closing cap (11) and have the open-ended frame, closing cap (11) lid is located the frame is in order to seal the opening forms the cavity that is used for installing electric core (3), the frame be provided with be used for to feed through runner (15) pour into the feed liquor pipe (13) of insulating coolant liquid into, be used for the circulation feed through runner (15) of coolant liquid and be used for following feed through runner (15) are outwards discharged feed through runner (14) of insulating coolant liquid the casing is through setting up the feed through runner at the frame to make insulating coolant liquid can flow in the feed through runner, directly carry out cooling process to the electric core, avoided among the prior art through set up other media and the poor problem of cooling effect that leads to between coolant liquid and electric core, improved the cooling efficiency of electric core greatly, reduced the thermal resistance, optimized the quick charge efficiency of electric core.

Description

Casing and power battery package

Technical Field

The utility model relates to a power battery wraps technical field, in particular to kinds of casings and power battery package.

Background

At present, the cooling modes of the power battery pack are mainly divided into two modes, namely natural cooling and liquid cooling, wherein the cooling effect of the liquid cooling is obviously higher than that of the natural cooling, and particularly, the liquid cooling is mainly adopted by arranging a cooling pipeline at the bottom or the side surface of the module to correspondingly cool the bottom surface or the side surface of the battery core, but the liquid cooling mode has at least two layers of media, namely a cooling plate and a heat conducting pad, from cooling liquid to the battery core, so that the thermal resistance of the cooling mode is in the level of 2.5-3K/W, only the quick charging speed of the battery core 1.5C-2C is met, the use requirement that the battery core can reach the charging speed of 3C-4C in steps is not met, the charging efficiency is limited, and the charging efficiency of the battery pack cannot meet the latest requirement of the market.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing kinds of casings and power battery package to solve among the prior art because of the adoption arrange the cooling tube and install additional structures such as cooling plate and heat conduction pad additional and carry out the charge efficiency that the liquid cooling mode leads to electric core seriously limited, can't satisfy the fast demand scheduling problem that fills in market at module bottom or side.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

casing, the casing includes the closing cap and has the open-ended frame, the closing cap lid is located the frame is in order to seal the opening and form the cavity that is used for installing the electricity core, the frame is provided with the feed liquor pipe that is used for to communicate the runner injection insulating coolant liquid, is used for circulating the intercommunication runner of coolant liquid and is used for following communicate the runner outward discharge the drain pipe of insulating coolant liquid.

Optionally, the communication flow passage is provided as an annular flow passage formed along an extending direction of the circumferential wall of the frame.

Optionally, the annular flow passage is arranged in a closed-loop structure.

Optionally, the frame includes end plate and rectangle frame, the end plate with the closing cap is respectively sealing connection in the both ends of rectangle frame, rectangle frame includes pairs boards and pairs second boards that are relative to each other, to the second board sets up to between the board and both sides respectively with to board sealing connection, the intercommunication runner is at to the board respectively with feed liquor pipe with the drain pipe communicates.

Optionally, is to the board is formed with well cavity, is to the second board includes the U type groove that outwards protrudes and sets up the structure glue of U type groove roof, so that the structure glue can bond in the surface of electricity core and then make the U type groove can form the encapsulation runner with the surface of electricity core jointly, and well cavity with the encapsulation runner communicates each other so as to form communicate the runner.

Optionally, the package flow channel is configured to gradually increase in cross-sectional area in a direction from the th plate communicating with the liquid inlet pipe to the th plate communicating with the liquid outlet pipe.

Optionally, the bottom wall of the U-shaped groove is a trapezoidal structure;

and/or a necking structure is arranged at the side of the U-shaped groove, which is adjacent to the th plate communicated with the liquid outlet pipe.

Optionally, the board includes the inner panel and the laminating sets up the planking outside the inner panel, the inner panel is formed with well cavity, the planking is formed with the mounting hole.

Optionally, the th inner plate and the th outer plate are formed with weight-reducing cavities.

Compared with the prior art, the shell has the following advantages:

the shell is provided with the communication flow channel through the frame, so that the insulating cooling liquid can flow in the communication flow channel, the electric core is directly cooled, the problem that in the prior art, the cooling effect is poor due to the fact that other media are arranged between the cooling liquid and the electric core is solved, the cooling efficiency of the electric core is greatly improved, the thermal resistance is reduced, and the quick charging efficiency of the electric core is optimized.

The utility model discloses an purpose in addition is in proposing kind of power battery package to solve the power battery package among the prior art because of the adoption arrange the cooling tube and install additional structures such as cooling plate and heat conduction pad additional and carry out the charge efficiency that liquid cooling refrigerated mode leads to electric core seriously limited, can't satisfy the fast demand scheduling problem that fills in market at module bottom or side.

kinds of power battery pack, power battery pack include electric core, structural adhesive and the casing, the electric core is installed in the cavity that the casing formed.

The power battery pack and the shell have the same advantages compared with the prior art, and the detailed description is omitted.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form part of the present invention, are provided to provide an understanding of the present invention with respect to step , the exemplary embodiments of the present invention and their description are intended to explain the present invention without forming an undue limitation on the invention.

Fig. 1 is an exploded view of a power battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present invention;

FIG. 3 is a schematic view of the th panel of the housing of FIG. 2;

FIG. 4 is a right side view of the th panel shown in FIG. 3;

fig. 5 is a schematic view of the frame of the housing of fig. 2 with the th and second panels removed.

Description of reference numerals:

1. the device comprises a shell, 11 parts of a sealing cover, 13 parts of a liquid inlet pipe, 14 parts of a liquid outlet pipe, 15 parts of a communicating flow channel, 16 parts of a hollow cavity, 17 parts of a U-shaped groove, 18 parts of a th plate, 20 parts of a second plate, 21 parts of a necking structure, 24 parts of a second inner plate, 25 parts of a second outer plate, 26 parts of a weight-reducing cavity, 27 parts of a mounting hole, 3 parts of a battery cell, 4 parts of structural adhesive, 5 parts of insulating paper.

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

In addition, the inside and outside in the embodiments of the present invention refer to the inside and outside of the shell contour.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

The utility model discloses an aspect of provides kinds of casings, as shown in fig. 1-5, casing 1 includes closing cap 11 and has the open-ended frame, closing cap 11 lid is located the frame is in order to seal the opening forms the cavity that is used for installing electric core 3, the frame be provided with be used for to intercommunication runner 15 pours into the feed liquor pipe 13 of insulating coolant liquid into, is used for circulating the intercommunication runner 15 of coolant liquid and be used for following intercommunication runner 15 outwards discharges the drain pipe 14 of insulating coolant liquid.

Through the scheme, the shell 1 is provided with the communication flow channel through the frame, so that the insulating cooling liquid can flow in the communication flow channel, the electric core is directly cooled, the problem of poor cooling effect caused by the fact that other media are arranged between the cooling liquid and the electric core in the prior art is solved, the cooling efficiency of the electric core is greatly improved, the thermal resistance is reduced, and the quick charging efficiency of the electric core is optimized. During the use, pour into the intercommunication runner 15 of frame with insulating coolant liquid through feed liquor pipe 13 in for the coolant liquid flows and carries out cooling treatment to electric core 3 in the casing along intercommunication runner 15, and the coolant liquid after the cooling treatment is discharged through drain pipe 14.

In order to fully cool the battery cell 3, the communication flow channel 15 is an annular flow channel formed along the extending direction of the circumferential wall of the frame, and the communication flow channel 15 is fully utilized to enable the cooling liquid to continuously flow around the circumferential wall of the frame, so that the battery cell 3 is uniformly cooled. Wherein the annular flow channel may be provided in various rational forms, for example, a spiral-shaped flow channel formed around the circumferential wall of the frame.

Step , the annular flow channel is set to be a closed-loop structure, so that on the premise of cooling the battery cell 3 comprehensively, the flow path of the cooling liquid flowing through the annular flow channel in the process of flowing from the liquid inlet pipe 13 to the liquid outlet pipe 14 can be shortened, and the cooling effect is optimized.

As shown in fig. 1 and 2, the frame includes end plates and a rectangular frame, the end plates and the cover 11 are respectively and hermetically connected to two ends of the rectangular frame, the rectangular frame includes pairs plates 18 opposite to each other and pairs of second plates 20 opposite to each other, pairs of the second plates 20 are disposed between pairs of the rd plates 18 and are hermetically connected with pairs of the th plates 18 at two sides, the communication flow channels 15 communicate with the liquid inlet pipe 13 and the liquid outlet pipe 14 at pairs of the th plates 18, respectively, and by disposing the liquid inlet pipe 13 and the liquid outlet pipe 14 on pairs of the th plates which are oppositely disposed, uniform cooling of the battery cells along the second plates is facilitated, so that the temperatures of the battery cells adjacent to two sides of the pairs of the second plates are equalized, the electrical performance of the battery cells is optimized.

In order to optimize the cooling effect of the casing, the communication channel at the second plate may be configured to directly contact the surface of the battery cell and perform a cooling process, that is, the surface of the battery cell may serve as a side wall of the communication channel, thereby effectively solving the problem of poor cooling effect caused by media such as a cooling plate and a thermal pad disposed between the cooling liquid and the battery cell in the prior art, for example, forms a hollow cavity 16 on the plate 18, forms a hollow cavity 16 on the second plate 20, includes an outwardly protruding U-shaped groove 17 and a structural adhesive disposed on a top wall of the U-shaped groove 17, so that the structural adhesive can be bonded to an outer surface of the battery cell, so that the U-shaped groove 17 and the outer surface of the battery cell together form an encapsulation flow channel, and the hollow cavity 16 and the encapsulation flow channel are communicated with each other to form the communication flow channel 15.

For example, the packaging flow channel is arranged to gradually increase the cross-sectional area along the direction from the th plate 18 communicated with the liquid inlet pipe 13 to the th plate 18 communicated with the liquid outlet pipe 14, so that the flow of the cooling liquid downstream of the cooling liquid is larger, and the temperature distribution of the battery cell along the direction of the second plate surface is more uniform.

In order to optimize the uniformity of the temperature distribution of the cells in the direction along the second plate surface in step , it is possible to improve the contact area of the cooling liquid with the cells, for example, the opening of the U-shaped groove is provided in a trapezoidal configuration, and the width of the opening near the side of the th plate 18 communicating with the liquid inlet pipe 13 is smaller than the width of the opening near the side of the th plate 18 communicating with the liquid outlet pipe 14, so that the temperature difference of the cells is always within an optimum range according to the present invention, in the case where the thickness of the housing is small, that is, the depth of the U-shaped groove is small, the shape of the bottom wall of the U-shaped groove (the side wall portion of the second plate protruding to the outside of the chamber formed by the housing, that is, the side wall portion of the second plate protruding to the right side in fig. 1) may be identical to the opening of the U-shaped groove, specifically, the bottom wall of the U-shaped groove is provided in a trapezoidal configuration, as shown in fig. 1 and 2, the width of the bottom wall near the side of the second plate 18 communicating with the liquid inlet.

In step , a necking structure 21 is arranged on the side of the th plate 18, which is adjacent to the U-shaped groove and communicated with the liquid outlet pipe 14, so that the cooling liquid can fill the whole packaging flow channel at the downstream, and the cooling effect of the battery cell at the downstream of the cooling liquid is improved.

In order to facilitate the th plate to be provided with a hollow cavity and various mounting holes 27 (for mounting the battery pack case) which are isolated from the hollow cavity by fluid, and to resist the expansion deformation of the battery cell, for example, as shown in fig. 3 and 4, the th plate 18 includes a 0 th inner plate and a th outer plate which is attached to and disposed outside the th inner plate, the th inner plate is formed with the hollow cavity 16, and the th outer plate is formed with the mounting holes 27, wherein the th inner plate and the th outer plate may be connected in various reasonable forms, for example, by welding, and at this time, a welding seam formed between the th inner plate and the th outer plate may be used to weld the second plate.

In order to reduce the overall weight of the housing, the th inner plate and the th outer plate are formed with weight-reducing cavities 26. , in order to improve the sealing effect at the liquid inlet pipe or the liquid outlet pipe, and to prevent the leakage of the cooling liquid through the weight-reducing cavities due to the liquid inlet pipe or the liquid outlet pipe not being installed in place or the bottom of the liquid inlet pipe or the liquid outlet pipe being unable to be welded in a sealing manner with the th plate, as shown in fig. 4, a portion of the th outer plate, which is disposed corresponding to the hollow cavity of the th inner plate, may be provided as a solid structure through which the liquid inlet pipe or the liquid outlet pipe is communicated with the hollow cavity, wherein the th 4 th and second outer plates may be provided in various reasonable forms, for example, as shown in fig. 3 and 4, in order to facilitate the installation of various external devices (for example, a high-low pressure insert or a balance valve), a side of the th inner plate adjacent to the cover 11 is provided as a thin plate structure, a side of the inner plate of the third plate adjacent to the end plate is provided as a thick plate structure, the thick plate structure is formed with a weight-reducing cavity, a plate surface structure is provided as a surface structure of the thin plate structure of the cell 8584 adjacent to the thin plate structure of the cell 8536.

The utility model discloses the second aspect provides kinds of power battery package, power battery package include electric core 3, structural glue 4 and casing 1, electric core 3 is installed casing 1 forms in the cavity wherein, the surface of electric core 3 along the extending direction of the circumference wall of frame can set up insulation system, for example, insulating coating etc. to inside avoiding the coolant liquid to invade electric core, guaranteed the safety in utilization performance of electric core.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

kinds of housings, characterized in that the housing (1) includes a cover (11) and a frame having an opening, the cover (11) is disposed on the frame to close the opening and form a chamber for installing a battery cell (3), the frame is provided with a communication flow channel (15) for flowing an insulating cooling liquid, a liquid inlet pipe (13) for injecting the insulating cooling liquid into the communication flow channel (15), and a liquid outlet pipe (14) for discharging the insulating cooling liquid from the communication flow channel (15) to the outside.
2. The housing according to claim 1, characterized in that the communication flow channel (15) is provided as an annular flow channel formed in the extension direction of the frame's circumferential wall.
3. The housing of claim 2, wherein the annular flow passage is provided as a closed loop structure.
4. The housing of claim 3, characterized in that the frame comprises end plates and a rectangular frame, the end plates and the cover (11) are sealingly connected at both ends of the rectangular frame, respectively, the rectangular frame comprises pairs of plates (18) opposite to each other and pairs of second plates (20) opposite to each other, pairs of the second plates (20) are disposed between pairs of the plates (18) and are sealingly connected at both sides with pairs of the plates (18), respectively, and the communication flow channel (15) communicates with the liquid inlet pipe (13) and the liquid outlet pipe (14) at pairs of the plates (18), respectively.
5. The housing of claim 4, wherein the plate (18) is formed with a hollow cavity (16), the second plate (20) comprises an outwardly protruding U-shaped groove (17) and a structural adhesive disposed on the top wall of the U-shaped groove (17) to enable the structural adhesive to adhere to the outer surface of the cell and further enable the U-shaped groove (17) to form a package flow channel together with the outer surface of the cell, and the hollow cavity (16) and the package flow channel are communicated with each other to form the communication flow channel (15).
6. The housing of claim 5, wherein the encapsulated flow channels are arranged with increasing cross sectional area in a direction from the th plate (18) in communication with the inlet pipe (13) to the th plate (18) in communication with the outlet pipe (14).
7. The shell as claimed in claim 6, wherein the bottom wall of the U-shaped groove is provided with a trapezoidal structure;

and/or a necking structure (21) is arranged at the side of the U-shaped groove, which is adjacent to the th plate (18) communicated with the liquid outlet pipe (14).
8. The housing of claim 5, wherein the th panel (18) includes a th inner panel and a th outer panel snugly disposed outside the th inner panel, the th inner panel being formed with the hollow cavity (16), the th outer panel being formed with a mounting hole (27).
9. The housing of claim 8, wherein the th and th inner plates form a weight-reducing cavity (26).
Power pack of kind, characterized in that, the power pack includes electric core (3), structural adhesive (4) and the casing (1) of any of of claims 1-9, the electric core (3) is installed in the cavity formed by the casing (1).