CN211719744U

CN211719744U - Battery package and car

Info

Publication number: CN211719744U
Application number: CN202020686724.7U
Authority: CN
Inventors: 林水杉
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-10-20
Anticipated expiration: 2030-04-29

Abstract

The application is suitable for the power battery field, provides a battery package and car, and this battery package includes box, apron and at least one cooling tube. Wherein, the apron lid is located on the box, and a plurality of cooling tubes set up in the cavity outside that apron and box enclose to close and form. The cooling pipe is provided with a first channel for cooling liquid to circulate along the axial direction of the cooling pipe, and the pipe wall of the cooling pipe is provided with a first through hole communicated with the first channel. The application provides a battery pack, liquid cooling system on the box is after losing heat dissipation power, the temperature can be brought for the battery module that does not hot runaway, the cavity outside of enclosing to close formation at apron and box is provided with a plurality of cooling tubes, the coolant liquid circulates in the first passageway of first cooling tube, and set up the first through-hole with first passageway intercommunication at the cooling tube, it reachs the melting point and damages to have delayed the apron, the heat is taken away in the cooling liquid phase transition, compare in setting up the water injection passageway on the lateral wall of apron, set up the cooling tube on the apron, can cool off the apron, and the structural strength of apron has been increased.

Description

Battery package and car

Technical Field

The application belongs to the technical field of power batteries, and particularly relates to a battery pack and an automobile.

Background

The battery package is the important spare part of new energy automobile, because the battery package can produce a large amount of heats when charging or output electric power, needs dispel the heat to the battery package this moment.

Current battery package is through setting up battery module in the box to set up the apron and form on the box, present battery package is through spraying water in to the battery package in with the cooling or put out a fire, spray water in order to cool down or put out a fire by the box outside in the box promptly, but this kind of mode can lead to the battery module because the trickle leads to thermal runaway, can produce great pressure in the battery package, leads to the battery package outage. Therefore, some of the existing battery packs are provided with water injection channels on the side walls of the cover plates to exchange heat and further cool the battery packs, but the cooling effect is still not ideal, and the strength of the cover plates can be reduced.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a battery package and car to solve the battery package among the prior art and spray water in the box and lead to battery module thermal runaway's technical problem.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a battery pack including:

a box body;

the cover plate is arranged on the box body in a covering manner; and

at least one cooling tube sets up in apron and the box encloses the cavity outside of closing the formation, and the first passageway that supplies the coolant circulation is seted up along its axial to the cooling tube, has seted up first through-hole on the pipe wall of cooling tube, first through-hole and first passageway intercommunication.

Through adopting above-mentioned technical scheme, set up a plurality of cooling tubes in the cavity outside that apron and box enclose and close, the coolant liquid circulates in the first passageway of first cooling tube to first through-hole has been seted up on the pipe wall of cooling tube, and when thermal runaway, the coolant liquid sprays on box or apron through first through-hole, thereby can cool off this battery package. And set up the cooling tube outside the cavity that closes at apron and box, compare in setting up the water injection passageway on the lateral wall of apron, set up the cooling tube outside the cavity that closes at apron and box enclose, can cool off this battery package, and increased the structural strength of battery package.

Optionally, a first check valve is disposed on the cooling pipe at a position corresponding to the opening end of the first through hole.

Through adopting above-mentioned technical scheme, the position that corresponds the open end of first through-hole on the cooling tube is equipped with first check valve for block that outside steam impurity gets into the cooling tube through first through-hole, thereby lead to the cooling tube to block up.

Optionally, a second through hole is formed in the pipe wall of the cooling pipe, the second through hole is communicated with the first channel, and the aperture of the first through hole is smaller than that of the second through hole.

By adopting the technical scheme, the second through hole is formed in the pipe wall of the cooling pipe and communicated with the first pipeline, the cooling liquid can be drained to the cover plate or the box body from the first channel through the second through hole, the aperture of the first through hole is smaller than that of the second through hole, the first through hole or the second through hole with different apertures can be opened according to requirements, the first through hole with the smaller aperture can be opened first, the second through hole with the larger aperture can be opened again, and waste of the cooling liquid is avoided.

Optionally, a second check valve is arranged on the cooling pipe at a position corresponding to the opening end of the second through hole, and the opening pressure of the second check valve is greater than that of the first check valve.

Through adopting above-mentioned technical scheme, the position that corresponds the open end of second through-hole on the cooling tube is equipped with the second check valve, a steam impurity for stopping outside gets into the cooling tube through the second through-hole, thereby lead to the cooling tube to block up, and further set up the cracking pressure of second check valve into the cracking pressure who is greater than first check valve, adjust the pressure of coolant liquid according to the thermal runaway degree, the cracking pressure of first check valve is little, can control earlier to open the first through-hole that the aperture is less, the cracking pressure of second check valve is big, can control to open the second through-hole again.

Optionally, a ratio of the aperture of the first through-hole to the aperture of the second through-hole is 0.01-1.

By adopting the technical scheme, the ratio of the aperture of the first through hole to the aperture of the second through hole is set to be 0.01-1, so that the cooling liquid can flow out of the first through hole or the second through hole, and the pressure of the cooling liquid can be conveniently adjusted.

Optionally, the first through hole and the second through hole are distributed on two sides of the longitudinal section of the cooling pipe.

By adopting the technical scheme, the cooling liquid can be divided from the two sides of the cooling pipe, so that the flowing distance of the cooling liquid is longer, and a large-area cooling box body or cover plate can be realized.

Optionally, the cooling pipe is arranged on the outer surface of the box body or the outer surface of the cover plate, and the cooling pipe is made of a material with a low melting point; the cooling pipe has a heat-conducting surface in contact with the cover plate or the case.

Through adopting above-mentioned technical scheme, when the cooling tube sets up in the surface of box or the surface of apron, adopt the material that the melting point is low to make the cooling tube, and the cooling tube has the spigot surface with apron or box contact, and when the temperature was higher, this cooling tube can melt rapidly for coolant liquid in this cooling tube can flow out and cool off apron or box.

Optionally, the ends of the cooling tube have an inlet and an outlet respectively communicating with the first passage.

Through adopting above-mentioned technical scheme, through setting up import and the export with first passageway intercommunication respectively for the coolant liquid is the circulation in first passageway, so that with the heat on apron or the box exchange.

Optionally, a third one-way valve is disposed on the cooling pipe at a position corresponding to the inlet and/or the outlet.

By adopting the technical scheme, the third one-way valve is arranged at the position, corresponding to the inlet, on the cooling pipe, so that the cooling liquid is conducted in one way, and the cooling liquid is prevented from flowing out of the inlet into the external container;

set up the third check valve through the position that corresponds the export on the cooling tube for block outside steam impurity and get into the cooling tube through the export, thereby lead to the cooling tube to block up.

The application also provides an automobile, which comprises the battery pack device, wherein the cooling pipe of the battery pack is communicated with the cooling liquid container of the automobile.

Through adopting above-mentioned technical scheme, through adopting foretell battery package device, when the thermal runaway, can cool off the battery package, and set up the cooling tube outside the cavity that closes formation at apron and box enclosure, compare in setting up water injection channel on the apron lateral wall, set up the cooling tube on the apron, can cool off the apron, and increased the structural strength of apron.

The application provides a battery package's beneficial effect lies in: set up a plurality of cooling tubes outside the cavity that closes the formation at apron and box, coolant liquid circulates in the first passageway of first cooling tube to set up first through-hole on the pipe wall of cooling tube, when thermal runaway, coolant liquid sprays box or apron through first through-hole on, can cool off whole battery package. And set up the cooling tube outside the cavity that closes at apron and box enclosure, compare in setting up the water injection passageway on the lateral wall of apron, set up the cooling tube outside the cavity that closes at apron and box enclosure, can cool off the battery package, and increased the structural strength of battery package.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure;

fig. 2 is an exploded schematic view of a battery pack according to an embodiment of the present disclosure;

FIG. 3 is a schematic perspective view of a cooling tube and a third check valve provided in an embodiment of the present application;

fig. 4 is a sectional view of fig. 3 taken along line a-a.

Wherein, in the figures, the respective reference numerals:

1-a battery pack; 11-a cover plate; 12-a cooling tube; 120-a first via; 121-a second via; 122-inlet; 123-an outlet; 124-a first channel; 13-a first one-way valve; 14-a second one-way valve; 15-a third one-way valve; 16-box body.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "fixedly disposed" or "disposed" on another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The meaning of "plurality" is two or more unless specifically limited otherwise.

Referring to fig. 1 to fig. 3 together, a battery pack 1 according to an embodiment of the present application will be described. The battery pack includes a case 16, a cover plate 11, and at least one cooling pipe 12. The box 16 is a cooling plate structure, the cover plate 11 covers the box 16, and the at least one cooling pipe 12 is disposed outside a cavity formed by the cover plate 11 and the box 16, that is, the cooling pipe 12 may be disposed in an external environment, and of course, may also be disposed on an outer surface of the cover plate 11 or an outer surface of the box 16. The cooling tube 12 is provided with a first channel 124 along the axial direction thereof for the circulation of cooling fluid, the wall of the cooling tube 12 is provided with a first through hole 120, and the first through hole 120 is communicated with the first channel 124.

The battery package 1 that the embodiment of the application provided, compared with the prior art, liquid cooling system on box 16 is losing heat dissipation power after, the temperature can be brought for not thermal runaway's battery module, cavity outside that encloses to close formation at apron 11 and box 16 is provided with a plurality of cooling tubes 12, the coolant liquid circulates in first passageway 124 of first cooling tube 12, and set up first through-hole 120 on the pipe wall of cooling tube 12, the coolant liquid shunts to apron 11 or box 16 through first through-hole 120, the temperature rise of whole battery package has been delayed, make it can not reach the melting point fast and damage, the heat is taken away in the change of coolant liquid phase, compare and set up water injection passageway on the lateral wall at apron 11, cavity outside that encloses to close formation at apron 11 and box 16 sets up cooling tube 12, the cooling area has been increased, the cooling rate can be effectively promoted, and the structural strength of apron 11 has been increased.

In the concrete application, the cooling liquid consists of water, an antifreezing agent and an additive, and can be alcohol type, glycerin type, glycol type and other types according to different components of the antifreezing agent. And can be selected according to specific requirements. The number of the cooling pipes 12 is one, two or more. The provision of a plurality of cooling pipes 12 makes it possible for the coolant to cool the cover plate 11 over a large area. Of course, in other embodiments, the diameter size of the cooling tube 12 may be increased.

In one embodiment of the present application, the plurality of cooling tubes 12 may be arranged in parallel and spaced apart, or may be partially crossed to form a mesh configuration.

In one embodiment of the present application, with further reference to fig. 4, the cooling tube 12 is cylindrical, and may be specifically cylindrical, elliptical cylindrical, prismatic, and the like. The cooling pipe 12 is provided with a first check valve 13 at a position corresponding to an open end of the first through hole 120, for blocking external moisture impurities from entering the cooling pipe 12 through the first through hole 120, thereby causing blockage of the cooling pipe 12. Specifically, this first through-hole 120 is the circular port, and its aperture is less to can cut apart and the drainage coolant liquid, be the fog form with the coolant liquid of drainage to on apron 11 or the box 16, the coolant liquid that is the fog form can the rapid evaporation heat absorption, has also avoided the coolant liquid to be the column outflow simultaneously, leads to the battery module trouble in the inflow box 16.

In this embodiment, the number of the first through holes 120 may be one, two, or more, and may be selected according to specific requirements. Preferably, the number of the first through holes 120 is plural, and the first through holes 120 are distributed at intervals along the axial direction of the cooling pipe 12, and by providing the plural first through holes 120, as much cooling fluid as possible can be distributed onto the cover plate 11 or the case 16 through the corresponding first through holes 120, so that the contact area between the cooling fluid and the cover plate 11 or the case 16 is increased, and the cooling fluid can cool the cover plate 11 or the case 16 in a large area.

In an embodiment of the present application, referring to fig. 4 in particular, a second through hole 121 is formed in a tube wall of the cooling tube 12, and the second through hole 121 is communicated with the first channel 124, so that the cooling liquid in the first channel 124 can be distributed to the cover plate 11 or the tank 16 through the second through hole 121. Specifically, this second through-hole 121 is the circular port, and the aperture is less to can cut apart and the drainage coolant liquid, be the fog form with the coolant liquid of drainage to on apron 11 or the box 16, the coolant liquid that is the fog form can the rapid evaporation heat absorption, has also avoided the coolant liquid to be the column outflow simultaneously, leads to the battery module trouble in the inflow box 16.

The second through hole 121 has a larger diameter than the first through hole 120. The first through holes 120 or the second through holes 121 with different aperture sizes can be opened according to requirements, the first through holes 120 with smaller aperture can be opened first, and the second through holes 121 with larger aperture can be opened again, so that the waste of cooling liquid is avoided.

Specifically, the number of the second through holes 121 may be one, two or more, and may be selected according to specific requirements. Preferably, the number of the second through holes 121 is multiple, the multiple second through holes 121 are distributed at intervals along the axial direction of the cooling pipe 12, and by providing the multiple second through holes 121, as much cooling liquid as possible can be guided to the cover plate 11 or the tank 16 through the corresponding second through holes 121, so that the cooling liquid can cool the cover plate 11 or the tank 16 in a large area.

In one embodiment, the second through holes 121 may be distributed in the circumferential direction of the cooling pipe 12 in a staggered manner with the first through holes 120, so that the cooling fluid cools the tank 16 or the cover plate 11 over a large area.

In one embodiment of the present application, the cooling pipe 12 is provided with a second check valve 14 at a position corresponding to the open end of the second through hole 121. And serves to block external moisture impurities from entering the cooling pipe 12 through the second through-hole 121, thereby causing clogging of the cooling pipe 12. The cracking pressure of the second check valve 14 is larger than that of the first check valve 13, and the ratio of the cracking pressure of the second check valve 14 to that of the first check valve 13 is 1.3-5 times. The first through hole 120 with a smaller aperture may be opened first and then the second through hole 121 may be opened according to the degree of thermal runaway. Specifically, the first check valve 13 and the second check valve 14 may be automatically opened according to pressure, and the opening pressure of the first check valve 13 is smaller than the opening pressure of the second check valve 14, so that the first through hole 120 communicating with the first check valve 13 may be opened first, and then the second through hole 121 communicating with the second check valve 14 may be opened. The first check valve 13 and the second check valve 14 may be selected from commercially available products, and are not limited herein.

In one embodiment of the present application, with further reference to fig. 4, the ratio of the aperture of the first through hole 120 to the aperture of the second through hole 121 is 0.01-1, thereby ensuring that the cooling fluid can flow out from the first through hole 120 or the second through hole 121, and also facilitating the adjustment of the pressure of the cooling fluid. And can be selected according to specific requirements.

In an embodiment of the present application, further referring to fig. 1 and 4, the first through holes 120 and the second through holes 121 may be distributed on both sides of the longitudinal section of the cooling tube 12. So that the coolant can be branched off from both sides of the cooling pipe 12, and thus the coolant can be discharged over a long distance, thereby cooling the case 16 or the cover plate 11 over a large area.

Specifically, the cooling pipe 12 has a cylindrical structure, and a line connecting an axis of the first through hole 120 and an axis of the second through hole 121 is located in a diameter direction of the cooling pipe 12. The connecting line of the axis of the first through hole 120 and the axis of the second through hole 121 is located in the diameter direction of the cooling pipe 12, that is, the first through hole 120 and the second through hole 121 are communicated to form a channel, so that the cooling liquid can flow out through the first through hole 120 and the second through hole 121 at the same time, and the connecting line of the axis of the first through hole 120 and the axis of the second through hole 121 is parallel to the cover plate 11, so that the cooling liquid can be directly drained onto the cover plate 11 or the box body 16, the cooling liquid can be sprayed out in a straight line, so that the spraying distance of the cooling liquid is far, and the cover plate 11 or the box body 16 can be cooled remotely.

In another embodiment of the present application, a line connecting the axis of the first through hole 120 and the axis of the second through hole 121 forms an included angle, and the liquid flowing direction is obliquely downward or obliquely upward to be sprayed on the cover plate 11 or the tank 16. The angle between the line between the axis of the first through hole 120 and the axis of the second through hole 121 is 30-60 deg.. In a specific application, an included angle between a connecting line between the axis of the first through hole 120 and the axis of the second through hole 121 is 30 °, 45 ° or 60 °, which can be selected according to specific requirements.

In one embodiment of the present application, the cooling pipe 12 is disposed on an outer surface of the box 16 or an outer surface of the cover plate 11, and the cooling pipe 12 is made of a material with a low melting point, i.e., the cooling pipe 12 is made of a material that does not resist high temperature, such as plastic. When thermal runaway occurs, the cooling pipe 12 above the cover plate 11 or the box 16 is heated and melted, and the cooling liquid in the cooling pipe 12 can directly flow out to cool the cover plate 11 or the box 16, so that the cover plate 11 or the box 16 is prevented from rapidly rising in temperature to reach a melting point quickly. Of course, in other embodiments, the cooling tubes 12 may be made of a thermally conductive material to facilitate rapid heat transfer into the cover 11 or the tank 16.

In this embodiment, the cooling pipe 12 may have a heat-conducting surface contacting the cover plate 11 or the case 16 to facilitate heat absorption by the express delivery, for example, the cross-sectional shape of the cooling pipe 12 may be polygonal such that the side of the cooling pipe 12 contacting the cover plate 11 or the case 16 is a face, thereby increasing the contact surface of the cooling pipe 12 with the cover plate 11 or the case 16 to enable the cooling pipe 12 to be rapidly melted.

Of course, in other embodiments, a groove having the same contour as the cooling pipe 12 may be formed in the cover plate 11 or the case 16, and the cooling pipe 12 may be placed in the groove, and the contact surface between the cooling pipe 12 and the cover plate 11 may be increased.

In one embodiment of the present application, and with particular reference to fig. 3, the ends of the cooling tube 12 have an inlet 122 and an outlet 123, respectively, in communication with a first passage 124, the inlet 122 being for connection to an external cooling fluid reservoir. By passing cooling fluid to inlet 122 and out outlet 123.

So that the cooling fluid can flow in the first passage 124 to exchange heat, facilitating rapid cooling of the cover 11 or the case 16.

In an embodiment of the application, further referring to fig. 3, the cooling pipe 12 is provided with a third one-way valve 15 at a position corresponding to the inlet 122, through which third one-way valve 15 an external cooling liquid container flows into the cooling pipe 12, but cooling liquid cannot flow out of the cooling pipe 12 through the third one-way valve 15, i.e. cooling liquid is conducted in one direction in the third one-way valve 15. The outflow of cooling fluid into the outer container through the inlet 122 is avoided.

In an embodiment of the present application, referring further to fig. 3, a third check valve 15 is disposed on the cooling pipe 12 at a position corresponding to the outlet 123, and the cooling liquid can flow out through the third check valve 15, but external moisture impurities cannot flow into the cooling pipe 12 through the third check valve 15, so as to avoid the cooling pipe 12 from being blocked, and thus the cooling liquid cannot smoothly flow through the first channel 124.

The application also provides an automobile, which comprises the battery pack device, wherein the cooling pipe 12 in the battery pack 1 is communicated with a cooling liquid container in the automobile.

By adopting the battery pack device in the above embodiment, the automobile can cool the cover plate 11 or the case 16, and the structural strength of the cover plate 11 or the case 16 is increased.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack, comprising:

a box body;

the cover plate is arranged on the box body in a covering manner; and

the cooling pipe is arranged on the outer side of a cavity formed by enclosing the cover plate and the box body, a first channel for cooling liquid to flow is formed in the axial direction of the cooling pipe, a first through hole is formed in the pipe wall of the cooling pipe, and the first through hole is communicated with the first channel.

2. The battery pack according to claim 1, wherein: and a first check valve is arranged on the cooling pipe corresponding to the opening end of the first through hole.

3. The battery pack according to claim 2, wherein: and a second through hole is formed in the pipe wall of the cooling pipe and communicated with the first channel, and the aperture of the first through hole is smaller than that of the second through hole.

4. The battery pack according to claim 3, wherein: and a second one-way valve is arranged on the cooling pipe at a position corresponding to the opening end of the second through hole, and the opening pressure of the second one-way valve is greater than that of the first one-way valve.

5. The battery pack according to claim 3, wherein: the ratio of the aperture of the first through hole to the aperture of the second through hole is 0.01-1.

6. The battery pack according to claim 3, wherein: the second through holes and the first through holes are distributed on two sides of the longitudinal section of the cooling pipe.

7. The battery pack according to any one of claims 1 to 6, wherein: the cooling pipe is arranged on the outer surface of the box body or the outer surface of the cover plate and is made of a material with a low melting point; the cooling pipe has a heat-conducting surface in contact with the cover plate or the case.

8. The battery pack according to any one of claims 1 to 6, wherein: the end of the cooling tube has an inlet and an outlet that communicate with the first passage, respectively.

9. The battery pack according to claim 8, wherein: and a third one-way valve is arranged on the cooling pipe corresponding to the inlet and/or the outlet.

10. An automobile comprising the battery pack of claim 9, wherein: and the cooling pipe of the battery pack is communicated with a cooling liquid container of the automobile.