CN111916610A - Parallel battery module water cooling plant suitable for aluminium frame box - Google Patents

Abstract

The invention discloses a parallel battery module water cooling device suitable for an aluminum frame box, comprising: a plurality of water cooling plates, the plurality of water cooling plates are laid flat on the bottom of the battery module, and each water cooling plate is provided with a water channel, so The cooling liquid is contained in the water channel; the water inlet main pipe is provided with a first multi-way valve, and the plurality of liquid ports of the first multi-way valve are respectively communicated with the water inlet ends of the plurality of water channels; the water outlet main pipe, on which A second multi-way valve is provided, and the plurality of liquid ports of the second multi-way valve are respectively communicated with the water outlet ends of the plurality of water channels. The present invention has basically the same pressure loss between the water cooling plates, basically the same cooling ability to each part of the battery module, and can have the beneficial effect of evenly cooling the battery module.

Description

Parallel battery module water cooling device for aluminum frame box

technical field

The invention relates to the technical field of battery module cooling. More specifically, the present invention relates to a parallel battery module water cooling device suitable for an aluminum frame case.

Background technique

Battery modules will generate a lot of heat during use, and with the widespread use of battery modules, the energy density and power density of battery modules will continue to increase, and the calorific value of batteries will continue to increase. Efficient heat dissipation structure has become an urgent need . In the prior art, an end-to-end series battery module water-cooling device is also used, and multiple water-cooling plates for heat exchange are common. Connected end to end, due to the long total water channel of the series water cooling device, the pressure loss of the entire water cooling system is relatively large, and with the flow direction of the cooling liquid in the water cooling system, the smaller the cooling liquid flow rate and flow rate, the worse the cooling performance, resulting in the poorer cooling performance of each battery module. Uneven cooling.

SUMMARY OF THE INVENTION

An object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages which will be explained later.

Another object of the present invention is to provide a parallel battery module water cooling device suitable for an aluminum frame case. The capabilities are basically the same, and the battery module can be cooled evenly.

In order to achieve these objects and other advantages according to the present invention, a parallel battery module water cooling device suitable for an aluminum frame case is provided, including:

a plurality of water-cooling plates, the plurality of water-cooling plates are flatly laid on the bottom of the battery module, and each water-cooling plate is provided with a water channel, and the cooling liquid is contained in the water channel;

a water inlet main pipe, which is provided with a first multi-way valve, and the plurality of liquid ports of the first multi-way valve are respectively connected with the water inlet ends of the plurality of water channels;

A water outlet main pipe is provided with a second multi-way valve, and the plurality of liquid ports of the second multi-way valve are respectively communicated with the water outlet ends of the plurality of water channels.

Preferably,

The water-cooled plate includes a water-cooled upper plate and a water-cooled lower plate that are sealed and covered, the water-cooled upper plate is a flat plate, the top surface of the water-cooled lower plate is recessed downward to form a double S-shaped groove, and the bottom surface of the water-cooled upper plate and The trench forms the water channel.

Preferably, a plurality of pairs of flat spacers are also included, and each pair of flat spacers is fixed on both sides of the water-cooled lower plate through a plurality of inserts.

Preferably,

Two longitudinal beams are arranged on the bottom of the box body, and the two longitudinal beams divide the bottom of the box body into three chambers, and the bottoms of the three chambers are provided with a thermal insulation layer;

The number of the water-cooling plates is three, and the three water-cooling plates are respectively arranged in the three chambers and laid on the heat insulation layer. the battery module;

Both the first multi-way valve and the second multi-way valve are four-way valves.

Preferably, the water inlet end and the water outlet end of the water channel are respectively communicated with the liquid ports of the first multi-way valve and the second multi-way valve through two rubber pipes, and the pipe diameter of the first multi-way valve is smaller than the pipe diameter of the second multi-port valve.

Preferably, the first multi-way valve and the second multi-way valve are both arranged in the middle chamber, and the rubber pipes in the two chambers are respectively penetrated on the corresponding longitudinal beams.

Preferably, the water inlet end and the water outlet end of the water channel are located on the same side of the water-cooling plate, and the two rubber pipes located in the same side chamber, which are respectively connected with the water inlet end and the water outlet end of the water channel, are penetrated through the water channel. on the same through hole on the longitudinal beam.

Preferably,

The four liquid ports of the first multi-port valve and the second multi-port valve are all located on the same plane as the bottom three liquid ports, and the three liquid ports form a T-shape, and the remaining one liquid port is vertically arranged shape, the diameter of the liquid port of the first multi-way valve is smaller than the diameter of the liquid port of the second multi-way valve;

It also includes a first valve seat and a second valve seat, the top of the first valve seat is higher than the top of the second valve seat, and the tops of the first valve seat and the second valve seat are both A T-shaped groove is provided, and the three T-shaped liquid ports of the first multi-way valve and the second multi-way valve are respectively clamped to the first valve support and the second valve support In the groove on the first valve seat, the radius of the groove on the first valve seat is smaller than the radius of the groove on the second valve seat.

Preferably, each groove is in the shape of two semi-cylindrical shapes.

Preferably, the material of the heat conducting plate is acrylic, and the material of the heat insulating layer is EPDM.

The present invention includes at least the following beneficial effects:

First, the flow of cooling liquid in multiple water-cooling plates is connected in parallel, that is, the water inlet pipe is divided by the first multi-way valve, and returned to the water outlet pipe through the second multi-way valve. The length of the water path of a single water-cooling plate is About the length of the water channel of a single water-cooling plate plus its corresponding length between the water inlet and outlet mains, it is significantly shorter than the water channel length of the series water-cooling device. Therefore, the pressure loss of the entire pipeline of the parallel water-cooling device is small, and the pressure loss between multiple water-cooling plates is basically the same. Compared with the series-type water-cooling device, the parallel-type water-cooling device has less reduction in the flow rate and flow rate of the water passage in the rear section of each water-cooling plate, and the cooling performance of multiple water-cooling plates is basically the same. The water inlet volume, water inlet speed and water inlet pressure in the multiple water cooling plates are basically the same, so that the cooling capacity of each part of the battery module is basically the same, so that the battery module can be cooled evenly.

Second, the grooves on the water-cooled lower plate can be formed by stamping, and then the water-cooled upper plate is sealed and covered, which is beneficial to the industrial quantitative production of water channels. Double S-shaped grooves can form double S-shaped water channels. It is beneficial to increase the effective cooling area and improve the cooling efficiency.

Third, since the water-cooled lower plate is located under the battery module, it is subject to the downward pressure of the battery module, which will easily cause the bending deformation of the water-cooled lower plate over time. Therefore, flat spacers are set on both sides of the water-cooled lower plate. It forms an integral body with the lower bottom plate of the water-cooling plate, so that the flat spacers on both sides have the effect of end support for the lower plate of the water-cooling plate and enhance the compressive strength in the vertical direction.

Fourth, the bottom of the box is usually separated by longitudinal beams to install multiple battery modules. Therefore, in order to match the separation structure at the bottom of the box, the number of water-cooling plates can be set according to the longitudinal beams, which is beneficial to The installation of the water cooling plate and the cooling of the battery module improve the cooling efficiency. The heat-conducting plate is arranged above the water-cooling plate, which is beneficial to the heat exchange between the battery module and the water-cooling plate, and the insulating layer is arranged under the water-cooling plate, which is conducive to reducing the heat exchange between the water-cooling plate and the bottom of the box, and improving the water-cooling plate to the battery module. cooling efficiency of the group.

Other advantages, objects, and features of the present invention will appear in part from the description that follows, and in part will be appreciated by those skilled in the art from the study and practice of the invention.

Description of drawings

1 is a layout diagram of the water-cooled plate of one of the technical solutions of the present invention;

2 is a schematic diagram of the flow direction of the cooling liquid of the water channel according to one of the technical solutions of the present invention;

3 is a schematic diagram of the connection between the flat spacer and the water-cooled lower plate according to one of the technical solutions of the present invention;

4 is a detailed view of the second multi-port valve according to one of the technical solutions of the present invention;

5 is a detailed view of the first valve support and the second valve support according to one of the technical solutions of the present invention;

6 is a layout diagram of the battery module, the thermally conductive plate, and the water-cooled plate according to one of the technical solutions of the present invention;

7 is a schematic diagram of the installation of the rubber hose and the through hole according to one of the technical solutions of the present invention;

8 is a schematic diagram of the connection of the rubber hose, the water inlet main pipe, and the water outlet main pipe according to one of the technical solutions of the present invention;

9 is a top view of the water-cooled lower plate according to one of the technical solutions of the present invention;

10 is an assembly schematic diagram of the battery module, the water-cooling plate, and the box according to one of the technical solutions of the present invention;

FIG. 11 is a detailed view of the aluminum frame according to one of the technical solutions of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, The orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation or a specific orientation. The orientation configuration and operation are therefore not to be construed as limitations of the present invention.

As shown in Figures 1 to 11, the present invention provides a parallel battery module water cooling device suitable for an aluminum frame box, including:

A plurality of water-cooling plates 2, the plurality of water-cooling plates 2 are laid flat on the bottom of the battery module 3, and each water-cooling plate 2 is provided with a water channel 4, and the water channel 4 contains a cooling liquid;

The water inlet main pipe 5 is provided with a first multi-way valve 51, and the plurality of liquid ports 52 of the first multi-way valve 51 are respectively communicated with the water inlet ends 25 of the plurality of water channels 4;

The water outlet main pipe 6 is provided with a second multi-way valve 61 , and the plurality of liquid ports 52 of the second multi-way valve 61 are respectively communicated with the water outlet ends 26 of the plurality of water channels 4 .

In the above technical solution, the flow of the cooling liquid in the plurality of water cooling plates 2 is connected in parallel, that is, the water inlet main pipe 5 is divided by the first multi-way valve 51 and returned to the water outlet main pipe through the second multi-way valve 61 6. The length of the water path of a single water-cooling plate 2 is about the length of the water channel 4 of a single water-cooling plate 2 plus the corresponding length between the water inlet main pipe 5 and the water outlet main pipe 6, which is significantly shorter than the water path length of the series water cooling device. . Therefore, the pressure loss of the entire pipeline of the parallel water cooling device is small, and the pressure loss between the multiple water cooling plates 2 is basically the same. Compared with the serial water cooling device, the reduction value of the flow velocity and flow rate of the water passage in the rear section of each water cooling plate 2 is smaller, and the cooling performance of the multiple water cooling plates 2 is basically the same. The water inlet volume, water inlet speed and water inlet pressure of the water channels 4 in the plurality of water cooling plates 2 are basically the same, so that the cooling capacity of each part of the battery module 3 is basically the same, so that the battery module 3 can be cooled evenly.

In another technical solution,

The water-cooled plate 2 includes a water-cooled upper plate 21 and a water-cooled lower plate 22 formed by sealing and covering. There are many ways of sealing and covering, such as brazing sealing. The bottom surface of the water-cooled upper plate 21 is flat, and the top of the water-cooled lower plate 22 is flat. A double S-shaped groove is formed facing downward, and the bottom surface of the water-cooled upper plate 21 and the groove form the water channel 4 . In the above technical solution, the groove on the water-cooled lower plate 22 can be formed by stamping, and then the water-cooled upper plate 21 is sealed and closed, which is beneficial to the industrial quantitative production of the water channel 4. The double S-shaped groove can form a double S-shaped groove. The S-shaped water channel 4 is beneficial to increase the effective cooling area and improve the cooling efficiency.

In another technical solution, a plurality of pairs of flat spacers 23 are also included, and each pair of flat spacers 23 is fixed on both sides of the water-cooled lower plate 22 through a plurality of inserts 24 . The fixing method can be welded. Since the water-cooled lower plate 22 is located below the battery module 3 and is subjected to downward pressure from the battery module 3, it is easy to cause bending and deformation of the water-cooled lower plate 22 for a long time. Therefore, the water-cooled lower plate 22 is used. The flat spacers 23 are provided on both sides, and the inserts 24 form a whole with the water-cooled lower plate 22, so that the flat spacers 23 on both sides have an end-supporting effect on the water-cooled lower plate 22 and enhance the compressive strength.

In another technical solution,

The bottom of the box body 1 is provided with two longitudinal beams 11, and the two longitudinal beams 11 divide the bottom of the box body 1 into three chambers, and the bottom of the three chambers is provided with an insulating layer 12; The water inlet 9 and the total water outlet 10 of the box are respectively arranged on the side walls of the chamber in the middle of the box 1, and the water inlet pipe 5 and the water outlet pipe 6 are respectively communicated with the general water inlet 9 of the box and the general water outlet 10 of the box. .

The number of the water-cooling plates 2 is three, and the three water-cooling plates 2 are respectively arranged in the three chambers and laid on the thermal insulation layer 12 . The battery module 3 is laid above the board 13;

The first multi-way valve 51 and the second multi-way valve 61 are both four-way valves.

In the above technical solution, the bottom of the box 1 is usually separated by the longitudinal beams 11, so as to install a plurality of battery modules 3, and the plurality of battery modules 3 form a multi-row module, and there are three modules in three rows. Therefore, in order to match the partition structure at the bottom of the box 1, the number of the water-cooling plates 2 can be set according to the longitudinal beams 11, which facilitates the installation of the water-cooling plates 2 and the cooling of the battery module 3, and improves the cooling efficiency. The heat-conducting plate 13 is arranged above the water-cooling plate 2, which is beneficial to the heat exchange between the battery module 3 and the water-cooling plate 2, and the insulating layer 12 is arranged under the water-cooling plate 2, which is beneficial to reduce the heat between the water-cooling plate 2 and the bottom of the box 1. exchange to improve the cooling efficiency of the water cooling plate 2 to the battery module 3 .

As shown in Figures 10 to 11, the reference numeral 15 denotes the box frame, the reference numeral 3 denotes the battery module, the reference numeral 31 denotes the battery module mounting light hole, the reference numeral 16 denotes the module mounting longitudinal beam, and each pair of module mounting longitudinal beams 16 are opposite to each other. Set in a chamber, the module mounting stringer 16 is arranged parallel to the stringer 11, and the module mounting stringer 16 is provided with mounting holes. FIG. 10 shows the battery module 3, the water cooling plate 2, the module The installation method of the longitudinal beam 16 , the heat conduction plate 13 and the aluminum frame box 1 is fast and stable, and has a strong heat dissipation function for the battery module 3 .

In another technical solution, the water inlet end 25 and the water outlet end 26 of the water channel 4 are respectively communicated with the liquid ports 52 of the first multi-way valve 51 and the second multi-way valve 61 through two rubber pipes 53 . , the pipe diameter of the first multi-way valve 51 is smaller than the pipe diameter of the second multi-way valve 61 . At the same flow rate, reducing the pipe diameter of the first multi-way valve 51 is beneficial to increase its water inlet pressure. The rubber tube 53 is integrally formed by a molding die. The rubber tube 53 has a certain hardness and flexibility, and can be appropriately deformed to adapt to the shuttle to the preset position in the aluminum frame for connection. Can flow smoothly.

In another technical solution, the first multi-way valve 51 and the second multi-way valve 61 are both arranged in the middle chamber, and the rubber pipes 53 in both chambers are respectively penetrated through the corresponding longitudinal beams 11 superior. The length of the water channel 4 of the water-cooling plates 2 in the multiple chambers can be as small as possible from the length of the rubber tube 53 , so as to ensure the uniformity of the cooling capacity of the multiple water-cooling plates 2 as much as possible.

In another technical solution, the water inlet end 25 and the water outlet end 26 of the water channel 4 are located on the same side of the water cooling plate 2, and the chambers located on the same side are respectively connected with the water inlet end 25 and the water outlet end of the water channel 4. The two rubber tubes 53 connected to the ends 26 are inserted through the same through hole 14 on the longitudinal beam 11 . The manufacturing process of the aluminum frame is reduced, and only one through hole 14 needs to be prepared to supply the passage of the two rubber tubes 53 .

In another technical solution,

The four liquid ports 52 of the first multi-port valve 51 and the second multi-port valve 61 are all located on the same plane as the bottom three liquid ports 52, and the three liquid ports 52 form a T shape, and the remaining one The shape of the liquid port 52 is vertically arranged, the diameter of the liquid port 52 of the first multi-port valve 51 is smaller than the diameter of the liquid port 52 of the second multi-port valve 61;

Also includes a first valve support 7 and a second valve support 8, the top of the first valve support 7 is higher than the top of the second valve support 8, the first valve support 7 and the second valve support 8 The top of the valve support 8 is provided with a T-shaped groove 71, and the three T-shaped liquid ports 52 of the first multi-way valve 51 and the second multi-way valve 61 are respectively clamped to the first valve. in the groove 71 on the seat 7 and the second valve seat 8 . The radius of the groove 71 on the first valve seat 7 is smaller than the radius of the groove 71 on the second valve seat 8 .

Since the rubber tube 53 has a certain flexibility, in order to make the connection between the plurality of rubber tubes 53 at the first multi-way valve 51 and the second multi-way valve 61 smoother and avoid mutual extrusion, a first valve support 7 and a second valve are provided. The support 8, the first valve support 7 and the second valve support 8 are dislocated front and rear, and the first valve support 7 is higher than the second valve support 8, which facilitates the connection of the rubber tube 53 of the water outlet 26. Moreover, the first valve support 7 and the second valve support 8 can position the first multi-way valve 51 and the second multi-way valve 61 to prevent them from moving in the casing 1 .

In another technical solution, each groove 71 is in the shape of two semi-cylindrical shapes, and is set according to the size of the first multi-way valve and the second multi-way valve, and matches the shape of the liquid port 52, that is, the first The radius of the groove 71 on the valve seat 7 is smaller than the radius of the groove 71 on the second valve seat 8 , which helps to limit and fix the first multi-port valve 51 and the second multi-port valve 61 .

In another technical solution, the material of the heat conducting plate 13 is acrylic, and the material of the heat insulating layer 12 is EPDM. Acrylic material has high surface hardness, good high temperature performance, light weight and good thermal conductivity. EPDM has the advantages of small thermal expansion, light weight and good thermal insulation performance. The combination of the two can not only play the performance of heat conduction and heat insulation, but also light in weight and has little impact on the weight burden of the entire battery system.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (10)

1. Parallel battery module water cooling plant suitable for aluminium frame box, its characterized in that includes:

the plurality of water cooling plates are horizontally laid at the bottom of the battery module, a water channel is arranged in each water cooling plate, and cooling liquid is contained in each water channel;

the water inlet main pipe is provided with a first multi-way valve, and a plurality of liquid ports of the first multi-way valve are respectively communicated with the water inlet ends of a plurality of water channels;

and the water outlet main pipe is provided with a second multi-way valve, and a plurality of liquid ports of the second multi-way valve are respectively communicated with the water outlet ends of the plurality of water channels.

2. A water cooling device for a parallel battery module suitable for an aluminum frame case as claimed in claim 1,

the water-cooling plate comprises a water-cooling upper plate and a water-cooling lower plate, the water-cooling upper plate is a plane plate, the top surface of the water-cooling lower plate is sunken downwards to form a double-S-shaped groove, and the bottom surface of the water-cooling upper plate and the groove form the water channel.

3. A parallel battery module water cooling device adapted for an aluminum frame box as claimed in claim 2 further comprising a plurality of pairs of flat spacers, each pair of flat spacers being fixed to both sides of the water-cooled lower plate by a plurality of inserts.

4. A water cooling device for a parallel battery module suitable for an aluminum frame case as claimed in claim 1,

the bottom of the box body is provided with two longitudinal beams which divide the bottom of the box body into three chambers, and the bottoms of the three chambers are provided with heat insulation layers;

the number of the water cooling plates is three, the three water cooling plates are respectively arranged in three chambers and are laid on the heat insulation layer, a heat conduction plate is laid above the water cooling plates, and the battery module is laid above the heat conduction plate;

the first multi-way valve and the second multi-way valve are both four-way valves.

5. A parallel battery module water cooling device applicable to aluminum frame boxes according to claim 4, wherein the water inlet end and the water outlet end of the water channel are respectively communicated with the liquid ports of the first multi-way valve and the second multi-way valve through two rubber hoses, and the pipe diameter of the first multi-way valve is smaller than that of the second multi-way valve.

6. A parallel battery module water cooling device applicable to aluminum frame boxes according to claim 5, wherein the first and second multi-way valves are both disposed in the middle chamber, and the rubber hoses in the two side chambers are respectively inserted on the corresponding longitudinal beams.

7. A water cooling device for a parallel battery module suitable for an aluminum frame box as claimed in claim 6, wherein the water inlet end and the water outlet end of the water channel are located on the same side of the water cooling plate, and two rubber hoses which are respectively communicated with the water inlet end and the water outlet end of the water channel and are located in the same side chamber are inserted into the same through hole on the longitudinal beam.

8. A water cooling device for a parallel battery module suitable for an aluminum frame box as claimed in claim 4,

the four liquid ports of the first multi-way valve and the second multi-way valve are all in a shape that three liquid ports at the bottom are positioned on the same plane, the three liquid ports form a T shape, the rest one liquid port is vertically arranged, and the diameter of the liquid port of the first multi-way valve is smaller than that of the liquid port of the second multi-way valve;

still include first valve support and second valve support, first valve support top is higher than second valve support top, first valve support with second valve support top all is equipped with the recess of T font, first multi-way valve with the second multi-way valve is three liquid mouths of T font joint respectively in first valve support with in the recess on the second valve support, the radius of the recess on the first valve support is less than the radius of the recess on the second valve support.

9. A parallel battery module water cooling apparatus adapted for an aluminum frame cabinet as claimed in claim 8 wherein each recess is in the shape of two half cylinders.

10. A parallel battery module water cooling device applicable to aluminum frame cases as in claim 4 wherein the heat conducting plate is made of acrylic and the heat insulating layer is made of EPDM.

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