CN210200838U - Cross beam, battery pack water cooling structure, battery pack and vehicle - Google Patents

Abstract

The utility model relates to the technical field of power battery packs, and provides a cross beam, a battery pack water cooling structure, a battery pack and a vehicle. The crossbeam of the present utility model is provided with a cooling channel inside which can pass cooling liquid, the crossbeam is provided with a water inlet and a water outlet that communicate with the cooling channel, and the cooling channel is separated by a partition to form an upper and lower side row. A first channel and a second channel are provided and communicated with each other at both ends. The beam structure of the utility model is provided with a cooling channel inside, and the beam is placed on the side of the battery module during the assembly process of the module, so that the battery module can be cooled from the side of the battery module, and the battery module can be enhanced. The cooling effect of the whole battery pack achieves a temperature equalization effect, thereby improving the discharge capacity of the battery. In addition, the cooling channel includes a first channel and a second channel that are arranged side by side up and down and whose ends are connected, so that the flow path of the cooling liquid can be extended as much as possible to achieve the best cooling effect.

Description

Cross beam, battery pack water cooling structure, battery pack and vehicle

technical field

The utility model relates to the technical field of power battery packs, in particular to a cross beam, a battery pack water cooling structure, a battery pack and a vehicle.

Background technique

With the country's vigorous promotion of the new energy field, electric vehicles have become the mainstream trend in the future. The key to the design of electric vehicles is the three-electric technology including battery, motor and electronic control. Among them, the power battery is the core power supply component of the vehicle. It determines the key indicators such as the driving mileage, cost, service life and safety of the vehicle. The overall design of the power battery pack mainly includes module design, structural component design, electronic and electrical design, thermal management design, BMS design, etc.

Among them, power battery thermal management technology is a new technology to improve the overall performance of the battery. Thermal management technology is particularly important in the design process of power batteries. At this stage, there are four commonly used thermal management technologies for power battery packs, namely liquid cooling, air cooling, natural cooling and phase change material cooling. Among them, the most common cooling method is liquid cooling, that is, adding a water-cooling plate structure to the battery pack. The liquid in the water-cooling plate is mainly ethylene glycol and water, which forms a circulation loop with the outside of the battery pack to realize heat transfer, taking away the battery cells in the The heat generated during the charging and discharging process is used to cool the battery pack to meet the temperature requirement inside the battery pack.

At present, in the design of the liquid cooling system of the battery pack, most of the water-cooling plates are arranged below the battery modules, and each water-cooling plate is connected through the water-cooling inlet and outlet pipes. The connection between the water-cooling pipeline and each water-cooling plate is one in and one out. , thus forming a water cooling circuit for the entire battery pack. However, at present, only the bottom of the cell is in contact with the water-cooling plate. The temperature of the bottom of the cell is controlled by the temperature of the coolant, and the temperature change at the bottom of the cell is transmitted to the top of the cell. Therefore, there is a temperature difference between the bottom and the top of the cell. This temperature difference Will affect the discharge capacity of the battery, thereby affecting the mileage of the vehicle.

Utility model content

In view of this, the present invention aims to provide a beam and battery that can cool the battery module from the side of the battery module, can enhance the cooling effect of the battery module, and make the entire battery pack achieve the effect of temperature balance. Including water cooling structure, battery pack and vehicle.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A cross beam, the inside of the cross beam is provided with a cooling channel that can pass into the cooling liquid, the cross beam is provided with a water inlet and a water outlet that communicate with the cooling channel, and the cooling channel is separated by a partition to form an up and down side by side. A first channel and a second channel are provided and communicated with each other at both ends.

Optionally, the water inlet communicates with the first channel, and the water outlet communicates with the second channel.

Optionally, a plurality of the cooling channels arranged along the height direction of the beam are arranged inside the beam.

A second aspect of the present invention provides a water-cooling structure for a battery pack, which includes a water inlet pipe and a water outlet pipe for flowing through the cooling liquid, a beam located on the side of the battery module according to any of the above solutions, and a water-cooling structure located on the battery module. The water cooling plate below, the water inlet is connected to the water inlet pipeline, the water outlet is connected to the water outlet pipeline, and both the water inlet pipeline and the water outlet pipeline are connected to the water cooling plate.

Optionally, the water inlet pipeline and the water outlet pipeline respectively include a plurality of pipe sections, and the two adjacent pipe sections are connected by a communication valve, and the communication valve is provided with a connection for connecting the adjacent pipe sections. The water pipe inlet and the water pipe outlet, the water cooling plate branch for connecting with the water cooling plate, and the cross beam branch for connecting with the cooling channel of the cross beam.

Optionally, the water-cooling plate branch is arranged to extend in a vertical direction, and the beam branch is bent and communicated with the water-cooling plate branch.

A third aspect of the present invention provides a battery pack, the battery pack includes a lower casing, a battery module disposed on the lower casing, and the battery pack water cooling structure described in the above solution.

Optionally, the battery pack water cooling structure includes a plurality of the beams arranged in parallel, the water inlet pipeline and the water outlet pipeline are arranged side by side in the middle of the beam and extend in a direction perpendicular to the length of the beam. , the battery modules are distributed on both sides of the water inlet pipeline and the water outlet pipeline.

Optionally, a middle position of the top of the beam is provided with a mounting groove that can be used to erect the water inlet pipeline and the water outlet pipeline.

A fourth aspect of the present invention provides a vehicle, which includes the battery pack described in the above solution.

Compared with the prior art, the beam described in the present utility model has the following advantages:

The cross-beam structure of the present invention is provided with a cooling channel inside, and the cross-beam is placed on the side of the battery module during the module assembly process, so that the battery module can be cooled from the side of the battery module, and the battery module can be enhanced. The cooling effect makes the entire battery pack achieve a temperature equalization effect, thereby improving the discharge capacity of the battery. In addition, the cooling channel includes a first channel and a second channel that are arranged side by side up and down and whose ends are connected, so that the flow path of the cooling liquid can be extended as much as possible to achieve the best cooling effect.

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

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic structural diagram of a beam according to an embodiment of the present utility model;

2 is a schematic structural diagram of a battery pack water cooling structure according to an embodiment of the present invention;

Fig. 3 is the structural representation of the water inlet pipeline and the water outlet pipeline in Fig. 2;

Fig. 4 is a partial schematic view of the communication valve in Fig. 2;

Fig. 5 is the structural representation of the communication valve in Fig. 2;

6 is an exploded view of the battery pack in an installed state according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of the battery pack of FIG. 6 .

Description of reference numbers:

1—Water inlet pipe, 2—Water outlet pipe, 3—Battery module, 4—Beam, 5—Water cooling plate, 6—Water inlet, 7—Water outlet, 8—Clapboard, 9—First channel, 10— Second channel, 11—communication valve, 12—water pipe inlet, 13—water pipe outlet, 14—water cooling plate branch, 15—beam branch, 16—installation groove, 17—lower casing, 18—side plate.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is conflict.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

1 , according to an aspect of the present invention, a cross beam is provided. The cross beam 4 is provided with a cooling channel that can pass into the cooling liquid, and the cross beam 4 is provided with an inlet that communicates with the cooling channel. The water outlet 6 and the water outlet 7, the cooling channel is separated by the partition plate 8 to form a first channel 9 and a second channel 10 which are arranged side by side up and down and whose ends are connected to each other.

The beam structure of the utility model is internally provided with a cooling channel that can pass into the cooling liquid. During the module assembly process, the beam is placed on the side of the battery module, so that the battery module can be cooled from the side of the battery module. Compared with the prior art, the cooling effect of the battery module can be enhanced, so that the temperature of the entire battery pack can be balanced, thereby improving the discharge capacity of the battery.

In addition, since the cooling channel includes a first channel and a second channel that are arranged side by side up and down and whose ends are connected, when battery modules are arranged on both sides of the beam, the cooling channels arranged side by side up and down can be compared with other arrangements. In the process of cooling liquid flowing through, the battery modules on both sides can be cooled evenly, further avoiding the temperature difference between the modules, so that the whole battery pack can achieve the effect of temperature balance, and the cooling channel can be set up in the above way to prolong the flow of the cooling liquid as much as possible. path for enhanced cooling. Among them, the design of the partition plate 8 can play the role of a reinforcing rib to reinforce the beam 4, and the two ends of the reinforcing rib are designed to be partially disconnected, so that the first channel 9 and the second channel 10 are connected to form cooling. fluid circuit.

In this embodiment, considering the characteristics of liquid flow, the water inlet 6 is arranged above the water outlet 7, correspondingly, the water inlet 6 communicates with the first channel 9, and the water outlet 7 communicates with the water outlet 7. The second channel 10 is connected to each other, thus, when the cooling liquid enters the cooling channel from the water inlet 6, the cooling liquid naturally and rapidly flows downward through the first channel 9 and enters the second channel 10, thereby increasing the flow rate of the cooling liquid, thereby increasing the Cooling efficiency for battery modules.

What is described above is the situation where a single cooling channel is arranged inside the beam 4. Further, according to the actual cooling requirements, a plurality of the cooling channels arranged along the height direction of the beam 4 may be arranged inside the beam 4, specifically , each cooling channel includes the above-mentioned first channel 9 and second channel 10 . When a plurality of cooling channels are arranged inside the beam 4, the first channels 9 and the second channels 10 will be alternately arranged along the height direction. The water inlet 6 and each second channel 10 are provided with a water outlet 7 . It is worth noting that the first channel 9 and the second channel 10 are arranged to extend along the length direction of the beam 4 so as to cover the entire side of the battery module as much as possible and improve the cooling effect.

Referring to FIG. 2 , a second aspect of the present invention provides a water-cooling structure for a battery pack, including a water inlet pipe 1 and a water outlet pipe 2 for flowing through the cooling liquid, and any of the solutions described in the above-mentioned solutions located on the side of the battery module 3 . The beam 4 and the water cooling plate 5 located below the battery module 3, the water inlet 6 is connected to the water inlet pipe 1, the water outlet 7 is connected to the water outlet pipe 2, the water inlet pipe 1 and The water outlet pipelines 2 are all connected with the water cooling plate 5 .

The cooling liquid enters the beam 4 and the water cooling plate 5 respectively through the water inlet pipe 1, and finally flows out from the water outlet pipe 2. The water-cooling structure of the battery pack, through the design of the water-cooling plate and the beam, enables the cooling liquid to pass through the water-cooling plate under the battery module and the lateral beam at the same time, thereby simultaneously cooling the bottom surface and the side of the battery module, so as to meet the overall requirements of the battery module. The need for rapid cooling and cooling can better control the temperature difference between the bottom and top of the battery module, so that the entire battery pack can achieve a temperature equalization effect, thereby improving the discharge capacity of the battery.

3-5, in order to achieve the above purpose, it is convenient for the water inlet pipeline 1 and the water outlet pipeline 2 to be connected with the beam 4 and the water cooling plate 5 at the same time, respectively, and the water inlet pipeline 1 and the water outlet pipeline 2 respectively include multiple There are two pipe sections, and two adjacent pipe sections are connected through a communication valve 11. The communication valve 11 is provided with a water pipe inlet 12 and a water pipe outlet 13 for connecting the adjacent pipe sections, for connecting with the water cooling plate 5 The connected water cooling plate branch 14 and the cross beam branch 15 for connecting with the cooling channel of the cross beam 4 .

It should be noted that, for the communication valve 11 on the water inlet pipeline 1, the water-cooling plate branch 14 and the beam branch 15 are used to pass the cooling liquid from the water inlet pipeline 1 to the water-cooling plate 5 and the beam 4, respectively. As for the communication valve 11 on the water outlet pipeline 2, the water cooling plate branch 14 and the beam branch 15 are used to pass the cooling liquid from the water cooling plate 5 and the beam 4 to the water outlet pipeline 2, that is to say, the When the communication valve 11 is applied to different pipelines, different functions can be achieved accordingly.

It can be understood that when a plurality of cooling channels are provided in the beam 4, the water inlet 6 of each cooling channel is connected to the communication valve 11 on the water inlet pipeline 1, and further, it can be connected to the communication valve 11 through different branch pipes. The same is true for the beam branch 15 and the water outlet 7.

The water-cooled plate branch 14 and the beam branch 15 can be set to any suitable structure. In order to speed up the circulation of cooling liquid and improve the cooling effect, the water-cooled plate branch 14 is arranged to extend in the vertical direction, and the beam branch 15 is: It is bent and communicated with the water cooling plate branch 14, that is to say, the communication valve 11 adopts a three-way structure, and the beam branch 15 is arranged in a bent shape to facilitate the insertion of water pipes.

6 to 7 , a third aspect of the present invention provides a battery pack, the battery pack includes a lower casing 17 , a battery module 3 disposed on the lower casing 17 , and the battery described in the above solution Water-cooled structure. Since the battery pack of the present invention adopts the above-mentioned battery pack water-cooling structure with beams, it has all the advantages of the above-mentioned battery pack structure. It can meet the needs of rapid cooling and cooling of the battery module as a whole, so as to better control the temperature difference between the bottom and the top of the battery module. Therefore, the battery pack can maintain temperature balance during use, avoid temperature difference, and improve the discharge capacity of the battery.

The lower housing 17 includes side plates 18 located at both ends of the beam 4 . During the installation process, the side plates 18 and the beam 4 abut against each other to improve the stability of the installation of the beam 4 .

Further, the battery pack water cooling structure includes a plurality of the beams 4 arranged in parallel, and the water inlet pipeline 1 and the water outlet pipeline 2 are arranged side by side at the middle position of the beam 4 and perpendicular to the beam. 4. Extending in the length direction, the battery modules 3 are distributed on both sides of the water inlet pipeline 1 and the water outlet pipeline 2. It should be noted that, in order to ensure the circulation of the coolant inside each beam 4, the number of communication valves 11 on the water inlet pipe 1 and the water outlet pipe 2 should be set to correspond to the number of beams 4. Specifically, on the water inlet pipe 1 The beam branch 15 of the communication valve 11 communicates with the water inlet 6 of the corresponding beam 4, and the beam branch 15 of the communication valve 11 on the water outlet pipeline 2 communicates with the water outlet 7 of the corresponding beam 4. Of course, multiple water-cooling plates 5 can be arranged in parallel, and each water-cooling plate 5 is provided with an inlet and an outlet. Similarly, the inlets are connected to the water inlet pipeline 1 and the outlets are connected to the water outlet pipeline 2 . Through the design of the communication valve 11 , the cooling liquid is conveyed through the water inlet pipe 1 and flows through one group of water cooling plates 5 and beams 4 , and then flows through the next group, and finally flows out through the water outlet pipe 2 .

By arranging the water inlet pipe 1 and the water outlet pipe 2 in the middle of the beam 4, the arrangement of the battery modules 3 can be matched, and the battery modules 3 located on both sides can be cooled at the same time, so as to further achieve the purpose of uniform cooling and reduce the mold The temperature difference between the groups ensures that the temperature of the entire battery pack is balanced.

It can be understood that when the water inlet pipeline 1 and the water outlet pipeline 2 are arranged in the middle position of the beam 4, correspondingly, the water inlet 6 and the water outlet 7 will also be correspondingly opened in the middle area of the side of the beam 4, so as to facilitate cooling liquid in and out. The cooling liquid enters the first channel 9 through the water inlet 6, then flows to both sides along the length of the beam 4, enters the second channel 10 through the end connecting area, and finally collects from both sides of the second channel 10 to the water outlet 7 to enter and exit. Water pipeline 2, so that the battery module can be cooled conveniently and quickly from the side of the battery module.

In order to save the arrangement space of the water cooling structure inside the battery pack, the middle position of the top of the beam 4 is provided with an installation groove 16 that can be used to erect the water inlet pipeline 1 and the water outlet pipeline 2. During the installation process, the water inlet pipeline 1 and the water outlet pipeline 2 can be clamped in the above-mentioned installation groove 16 to facilitate the transportation of the cooling liquid.

A fourth aspect of the present invention provides a vehicle, which includes the battery pack described in the above solution. The vehicle includes all the advantages of the battery pack described above and will not be repeated here.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. A beam, characterized in that a cooling channel capable of passing cooling liquid is provided inside the beam (4), and a water inlet (6) that communicates with the cooling channel is provided on the beam (4) and a water outlet (7), the cooling channel is separated by a partition plate (8) to form a first channel (9) and a second channel (10) which are arranged side by side up and down and communicate with each other at both ends. 2. The beam according to claim 1, wherein the water inlet (6) communicates with the first channel (9), and the water outlet (7) communicates with the second channel (10) connected. 3. The beam according to claim 1, characterized in that, a plurality of the cooling channels arranged along the height direction of the beam (4) are provided inside the beam (4). 4. A water cooling structure for a battery pack, characterized in that it comprises a water inlet pipe (1) and a water outlet pipe (2) for flowing through the cooling liquid, and claims 1-3 located on the side of the battery module (3) In any one of the beams (4) and the water cooling plate (5) located below the battery module (3), the water inlet (6) is connected to the water inlet pipeline (1), and the water outlet (7) is connected to the water outlet pipeline (2), and both the water inlet pipeline (1) and the water outlet pipeline (2) are connected to the water cooling plate (5). 5 . The battery pack water cooling structure according to claim 4 , wherein the water inlet pipeline ( 1 ) and the water outlet pipeline ( 2 ) respectively comprise a plurality of pipe sections, and between two adjacent pipe sections It is connected through a communication valve (11), and the communication valve (11) is provided with a water pipe inlet (12) and a water pipe outlet (13) for connecting the adjacent pipe sections, and a water pipe inlet (13) for connecting with the water cooling plate (5). A water-cooled plate branch (14) and a cross beam branch (15) for connecting with the cooling channel of the cross beam (4). 6. The battery pack water-cooling structure according to claim 5, wherein the water-cooling plate branch (14) is arranged to extend in a vertical direction, and the beam branch (15) is bent and communicated with The water cooling plate branch (14). 7. A battery pack, characterized in that the battery pack comprises a lower casing (17), a battery module (3) arranged on the lower casing (17), and any one of claims 4-6 The battery pack water cooling structure described in item. 8 . The battery pack according to claim 7 , wherein the battery pack water cooling structure comprises a plurality of the beams ( 4 ) arranged in parallel, the water inlet pipeline ( 1 ) and the water outlet pipeline ( 8 . 2) are arranged side by side in the middle of the beam (4) and extend in a direction perpendicular to the length of the beam (4), and the battery modules (3) are distributed in the water inlet pipe (1) and the outlet. Both sides of the water line (2). 9 . The battery pack according to claim 8 , characterized in that an installation capable of erecting the water inlet pipeline ( 1 ) and the water outlet pipeline ( 2 ) is provided in the middle position of the top of the beam ( 4 ). 10 . slot (16). 10. A vehicle, characterized in that the vehicle comprises the battery pack according to any one of claims 7-9.

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