A battery pack cooling plate, cooling device and preparation method thereof

Abstract

The present invention discloses a battery pack cooling plate, comprising a first substrate, which is made of a deformable aluminum plate; a second substrate, which is made of a deformable aluminum plate and is spaced apart from the first substrate; a side plate, one end of which is connected to the first substrate and the other end of which is connected to the second substrate, and which can be enclosed with the first substrate and the second substrate to form a hollow structure; a fusion portion, which is filled between the second substrate and the first substrate and can form a coolant channel by inflation; a connecting block, which is arranged on the first substrate and is connected to the coolant channel and is used to connect the coolant pipeline; wherein the first substrate, the second substrate, the side plate and the connecting block are integrally brazed. The present invention also discloses a battery pack cooling device having the battery pack cooling plate and a preparation method thereof. The battery pack cooling plate and the cooling device made by inflation technology can adjust the thickness of the cooling plate and the coolant channel parameters according to different application environments, so that the cooling device has a relatively excellent heat dissipation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile batteries, and in particular to a battery pack cooling plate, a cooling device and a preparation method thereof. Background Art

[0002] As the main power storage device of electric vehicles, power batteries can cause heat accumulation in the battery when they are continuously discharged at a high rate during vehicle operation. When the operating temperature of the battery pack is too high, its cycle life and capacity will drop sharply, thus affecting the stability of the electric vehicle. In severe cases, it may even cause the electric vehicle to explode and catch fire. Therefore, automotive power battery heat dissipation technology is very important for the safe and stable driving of electric vehicles.

[0003] The cooling plate and the battery pack are connected to the battery pack side beams through screws, and thermal conductive glue is used to fill the space between the cooling plate and the battery pack module. The tip area of ​​the water inlet and outlet is placed outside the package. The cooling plate requires a connecting block to connect the water inlet and outlet with the water inlet and outlet on the cooling plate. The existing products use I-steel and side beams to weld to form a connecting structure, so that the cooling plate and the water pipe are fixed to the I-steel with screws respectively. However, the I-steel is large and heavy, which has a negative impact on the weight reduction goal of the battery pack. Summary of the invention

[0004] The present invention provides a battery pack cooling plate, which greatly reduces the weight of the cooling plate and has excellent heat dissipation performance by punching a fusion portion between a first substrate and a second substrate having a hollow structure, and blowing to form a cooling liquid channel, and arranging an integrally brazed connecting block on the first substrate to communicate with the cold zone liquid channel.

[0005] The technical solution of the present invention is:

[0006] A battery pack cooling plate, comprising:

[0007] A first substrate, which is made of a deformable aluminum plate;

[0008] A second substrate, which is made of a deformable aluminum plate and is spaced apart from the first substrate;

[0009] A side plate, one end of which is connected to the first substrate, and the other end of which is connected to the second substrate, and can be enclosed with the first substrate and the second substrate to form a hollow structure;

[0010] A fusion portion filled between the first substrate and the second substrate, capable of forming a cooling liquid channel by inflation;

[0011] A connecting block, which is disposed on the first substrate and communicates with the coolant channel and is used to connect a coolant pipeline;

[0012] The first substrate, the second substrate, the side plate and the connecting block are integrally brazed.

[0013] Preferably, the fusion portion is made of one of high-density polyethylene, calcium carbonate-modified high-density polyethylene, glass fiber-reinforced high-density polyethylene and metallocene polyethylene.

[0014] Preferably, the coolant channel includes a first channel and a second channel, and the first channel and the second channel are symmetrically arranged.

[0015] Preferably, the connecting block comprises a main body and;

[0016] A first water inlet, a second water inlet, a first water outlet and a second water outlet are arranged on one side of the main body;

[0017] The first water inlet is connected to one end of the first channel;

[0018] The second water inlet is connected to one end of the second channel;

[0019] The first water outlet is connected to the other end of the first channel;

[0020] The second water outlet is communicated with the other end of the second channel.

[0021] Preferably, it also includes a buckle, which is arranged on the first water inlet, the second water inlet, the first water outlet and the second water outlet, and can be detachably connected to the coolant pipeline.

[0022] Preferably, the thickness of the first substrate and the second substrate are both 1-2 mm; the diameter of the coolant channel is 5-30 mm, and the channel spacing is 2-20 mm.

[0023] Another object of the present invention is to provide a battery pack cooling device, including the above-mentioned battery pack cooling plate, cooling box and guide mechanism, which is suitable for multi-module battery packs, has a simple structure and is easy to assemble. At the same time, the area of ​​the cooling plate bracket is larger than the area of ​​the cooling box, and the connecting block of the cooling plate can be placed outside the cooling box without occupying the internal space of the cooling box. The overall heat dissipation performance of the cooling device is excellent.

[0024] A battery pack cooling device, comprising:

[0025] at least one battery pack cooling plate;

[0026] A cooling box, comprising a box body and at least one cooling plate bracket, the cooling plate bracket being used to support a battery pack cooling plate;

[0027] A flow guiding mechanism is connected to the cooling reflux system and has a liquid supply pipe and a reflux pipe, wherein the liquid supply pipe is connected to the water inlet and the reflux pipe is connected to the water outlet;

[0028] The area of ​​the cooling plate bracket is larger than the side area of ​​the box body, so that the connecting block of the cooling plate is located outside the cooling box.

[0029] Preferably, the cooling plate bracket is detachably connected to the bottom of the box body or is arranged at intervals in the box body to form a plurality of battery accommodating cavities.

[0030] Preferably, the flow guiding mechanism comprises:

[0031] A liquid supply pipe, one end of which is connected to the liquid outlet of the cooling reflux system, and has a plurality of liquid supply branches, which are respectively connected to the water inlet;

[0032] The reflux pipe has one end connected to the reflux port of the cooling reflux system and has a plurality of reflux branches, which are respectively connected to the water outlets.

[0033] Another object of the present invention is to provide a method for preparing a battery pack cooling device. The method is simple and cooling plates of different specifications can be made by simply replacing the blowing mold to meet the heat dissipation requirements of different battery packs.

[0034] A method for preparing a battery pack cooling device, comprising:

[0035] Placing a first substrate, a second substrate and a side panel having a hollow structure in a forming mold;

[0036] The fusion portion is heated until it has fluidity, and the fusion portion is injected between the first substrate and the second substrate along the water inlet of the connection block;

[0037] Blowing air toward the fusion portion along the water inlet of the connection block to form a battery pack cooling plate with a coolant channel;

[0038] Placing a plurality of battery pack cooling plates on a cooling plate support of a cooling box;

[0039] The water inlet is connected to the liquid supply branch pipe of the diversion mechanism by using buckles, and the water outlet is connected to the return branch pipe.

[0040] The beneficial effects of the present invention are:

[0041] 1. The present invention provides a battery pack cooling plate, which greatly reduces the weight of the cooling plate and has excellent heat dissipation performance by punching a fusion portion between a first substrate and a second substrate having a hollow structure, forming a cooling liquid channel by inflation, and arranging an integrally brazed connecting block on the first substrate to communicate with the cold zone liquid channel.

[0042] 2. The present invention provides a battery pack cooling device, which is suitable for multi-module battery packs, has a simple structure, is easy to assemble, and the area of ​​the cooling plate bracket is larger than the side area of ​​the box body, so that the connection block of the cooling plate can be placed outside the cooling box without occupying the internal space of the cooling box. The overall heat dissipation performance of the cooling device is excellent. At the same time, a preparation method of a battery pack cooling device is also provided. The method is simple, and cooling liquid plates of different specifications can be made by simply replacing the inflation mold to meet the heat dissipation requirements of different battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the battery pack cooling plate structure in one embodiment of the present invention.

[0044] Figure 2 Detailed description of the invention Figure 4 is a cross-sectional view of a battery pack cooling plate according to an embodiment of the present invention.

[0045] Figure 3 Schematic diagram of the structure of a battery pack cooling device in one embodiment of the present invention.

[0046] Figure 4 Schematic diagram of the structure of the flow guide mechanism in one embodiment of the present invention.

[0047] Figure 5 Schematic diagram of the structure of a battery pack cooling device in one embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The terms "inside" and the like indicating directions or positional relationships are based on the directions or positional relationships described in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] like Figure 1-2 As shown, a battery pack cooling plate includes a first substrate 110, a second substrate 120, a side plate 130, a fusion portion 140 and a connection block 150.

[0052] The first substrate 110 and the second substrate 120 are both made of deformable aluminum plates. The first substrate 110 and the second substrate 120 are spaced apart. One end of the side plate 130 is connected to the first substrate 110, and the other end is connected to the second substrate 120. The side plate 130 can be enclosed with the first substrate 110 and the second substrate 120 to form a hollow structure. The fusion portion 140 is filled between the first substrate 110 and the second substrate 120, and can form a coolant channel AB by blowing. The connecting block 150 is arranged on the first substrate 110 and is connected to the coolant channel AB for connecting the coolant pipeline. The first substrate 110, the second substrate 120, the side plate 130 and the connecting block 150 are brazed into one piece.

[0053] The present invention punches a fusion portion between a first substrate and a second substrate having a hollow structure, forms a cooling liquid channel by inflation, and provides an integral brazed connection block on the first substrate to communicate with the cold zone liquid channel, thereby greatly reducing the weight of the cooling plate and achieving excellent heat dissipation performance.

[0054] In a preferred embodiment, the fusion portion is made of one of high-density polyethylene, calcium carbonate-modified high-density polyethylene, glass fiber-reinforced high-density polyethylene and metallocene polyethylene.

[0055] In a preferred embodiment, the coolant channel includes a first channel A and a second channel B, and the first channel A and the second channel B are symmetrically arranged. The symmetrically arranged first channel A and the second channel B are more conducive to uniform heat transfer of the cooling plate, uniform heat dissipation of the battery pack, and reduce the impact of uneven heat on the charging and discharging performance of the battery pack.

[0056] A preferred embodiment is that the connecting block 150 includes a main body 151 and a first water inlet 152, a second water inlet 153, a first water outlet 154 and a second water outlet 155 arranged on one side of the main body 151, the first water inlet 152 is connected to one end of the first channel A, the second water inlet 153 is connected to one end of the second channel A, the first water outlet 154 is connected to the other end of the first channel A, and the second water outlet 155 is connected to the other end of the second channel B.

[0057] A preferred embodiment further includes a buckle 160, which is arranged on the first water inlet 153, the second water inlet 153, the first water outlet 154 and the second water outlet 155, and can be detachably connected to the coolant pipeline.

[0058] In a preferred embodiment, the thickness of the first substrate 110 and the second substrate 120 are both 1-2 mm.

[0059] In a preferred embodiment, the diameter of the coolant channel AB is 5-30 mm, and the channel spacing is 2-20 mm.

[0060] like Figure 3-4 As shown, a battery pack cooling device includes at least one battery pack cooling plate 100 , a cooling box 200 and a flow guiding mechanism 300 .

[0061] The cooling box 200 includes a box body 210 and at least one cooling plate bracket 220, the cooling plate bracket 220 is used to support the battery pack cooling plate 100, the flow guide mechanism 300 is connected to the cooling reflux system, and has a liquid supply pipe 310 and a return pipe 320, the liquid supply pipe 310 is connected to the water inlet 152 (153), and the return pipe 320 is connected to the water outlet 154 (155). The area of ​​the cooling plate bracket 220 is larger than the side area of ​​the box body 210, so that the connection block 150 of the cooling plate 100 is located outside the cooling box 200.

[0062] In a preferred embodiment, the cooling plate bracket 220 is detachably connected to the bottom of the box body 210 or is arranged at intervals in the box body 210 to form a plurality of battery accommodating cavities.

[0063] Preferably, the flow guiding mechanism 300 is connected to the cooling reflux system and has a liquid supply pipe 310 and a reflux pipe 320, wherein the liquid supply pipe 310 is connected to the water inlet 152 (153), and the reflux pipe 320 is connected to the water outlet 154 (155).

[0064] A preferred embodiment is that one end of the liquid supply pipe 310 is connected to the liquid outlet of the cooling reflux system, and has multiple liquid supply branches 311 thereon, and the liquid supply branches 311 are respectively connected to the water inlet 152 (153); one end of the reflux pipe 320 is connected to the reflux port of the cooling reflux system, and has multiple reflux branches 311, and the reflux branches 311 are respectively connected to the water outlet 154 (155).

[0065] A preferred real-time example Figure 5 As shown, the cooling box 200 includes a box body 210 and a cooling plate bracket 220, the cooling plate bracket 220 is arranged at the bottom of the box body 210, the area of ​​the cooling bracket 220 is larger than the area of ​​the bottom of the box body 210, one end edge of the cooling plate bracket 220 protrudes from the box body 210, the battery pack cooling plate 200 is supported in the cooling plate bracket 220, the connecting block 150 of the battery pack cooling plate 100 is located outside the box body, the connecting block 150 is detachably connected to the outer frame of the box body 210, the guide mechanism 300 is located on one side of the box body, and the liquid supply pipe 310 of the guide mechanism 300 is connected to the water inlet, and the return pipe 320 is connected to the water outlet

[0066] A method for preparing a battery pack cooling device includes the above-mentioned battery pack cooling plate 100, and the specific steps are as follows:

[0067] The first substrate 110, the second substrate 120 and the side plate 130 having a hollow structure are placed in a molding mold;

[0068] The fusion portion 140 is heated to have fluidity, and the fusion portion 140 is injected into between the first substrate 110 and the second substrate 120 along the water inlet 152 (153) of the connection block 150;

[0069] Blowing and molding the fusion portion 140 along the water inlet 152 (153) of the connection block 150 to form a battery pack cooling plate 100 having a coolant channel AB;

[0070] Placing a plurality of battery pack cooling plates 100 on a cooling plate support 210 of a cooling box 200;

[0071] The water inlet 152 ( 153 ) is connected to the liquid supply branch pipe 311 of the flow guiding mechanism 300 by means of the buckle 160 , and the water outlet 154 ( 155 ) is connected to the return branch pipe 321 .

[0072] The heating temperature of the fusion portion 140 is 160-180°C.

[0073] In actual application, a blowing mold that cooperates with the first substrate 110 and the second substrate 120 is used. According to the different heat dissipation requirements of different battery packs, it is only necessary to replace different blowing molds. By controlling the blowing parameters, the diameter and spacing of the coolant channel that affect the heat dissipation performance can be changed to obtain cooling plates with different thicknesses and different flow rates, which are suitable for a variety of application environments.

[0074] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0075] The present invention provides a battery pack cooling plate, which is formed by punching a fusion portion between a first substrate and a second substrate having a hollow structure, using inflation to form a coolant channel, and providing an integral brazed connection block on the first substrate to communicate with the cold zone liquid channel, thereby greatly reducing the weight of the cooling plate and providing excellent heat dissipation performance. The present invention provides a battery pack cooling device, which is suitable for multi-module battery packs and has a simple structure and is easy to assemble. The area of ​​the cooling plate bracket is larger than the side area of ​​the box body, and the connection block of the cooling plate can be placed outside the cooling box without occupying the internal space of the cooling box. The cooling device has excellent overall heat dissipation performance. At the same time, a preparation method for a battery pack cooling device is also provided. The method is simple, and coolant plates of different specifications can be made by replacing the inflation mold to meet the heat dissipation requirements of different battery packs.

[0076] The above contents are only embodiments of the present invention. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. It is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific implementations. Without departing from the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A battery pack cooling plate, It is characterized in that include: A first substrate, which is made of a deformable aluminum plate; A second substrate, which is made of a deformable aluminum plate and is spaced apart from the first substrate; A side plate, one end of which is connected to the first substrate, and the other end of which is connected to the second substrate, and can be enclosed with the first substrate and the second substrate to form a hollow structure; The fusion part is formed by placing the first substrate, the second substrate and the side plate having a hollow structure in a forming mold, the forming mold is matched with the first substrate and the second substrate, the fusion part is filled between the first substrate and the second substrate, and a cooling liquid channel can be formed by inflation; A connecting block, which is arranged on the first substrate and communicates with the coolant channel and is used to connect a coolant pipeline; Wherein, the first substrate, the second substrate, the side plate and the connecting block are integrally brazed; The coolant channel comprises a first channel and a second channel, wherein the first channel and the second channel are symmetrically arranged; The connecting block comprises a main body and A first water inlet, a second water inlet, a first water outlet, and a second water outlet are arranged on one side of the main body; The first water inlet is connected to one end of the first channel; The second water inlet is connected to one end of the second channel; The first water outlet is connected to the other end of the first channel; The second water outlet is connected to the other end of the second channel; It also includes a buckle, which is arranged on the first water inlet, the second water inlet, the first water outlet and the second water outlet, and can be detachably connected to the coolant pipeline.

2. The battery pack cooling plate according to claim 1, It is characterized in that The fusion portion is made of one of high-density polyethylene, calcium carbonate-modified high-density polyethylene, glass fiber-reinforced high-density polyethylene and metallocene polyethylene.

3. The battery pack cooling plate according to claim 1, It is characterized in that The thickness of the first substrate and the second substrate are both 1-2 mm; the diameter of the coolant channel is 5-30 mm, and the channel spacing is 2-20 mm.

4. A battery pack cooling device, comprising a battery pack cooling plate as claimed in any one of claims 1 to 3, It is characterized in that include: at least one battery pack cooling plate; A cooling box, comprising a box body and at least one cooling plate bracket, wherein the cooling plate bracket is used to support the battery pack cooling plate; A flow guiding mechanism, which is in communication with the cooling reflux system and has a liquid supply pipe and a reflux pipe, wherein the liquid supply pipe is in communication with the water inlet, and the reflux pipe is in communication with the water outlet; Wherein, the area of ​​the cooling plate bracket is larger than the side area of ​​the box body, so that the connection block of the cooling plate is located outside the cooling box; The cooling plate bracket is detachably connected to the bottom of the box or is arranged in intervals in the box to form a plurality of battery accommodating cavities; The flow guiding mechanism comprises: A liquid supply pipe, one end of which is connected to the liquid outlet of the cooling reflux system, and has a plurality of liquid supply branches, each of which is connected to the water inlet; A reflux pipe has one end connected to the reflux port of the cooling reflux system and has a plurality of reflux branches, and the reflux branches are respectively connected to the water outlets.

5. A method for preparing a battery pack cooling device, comprising the battery pack cooling plate according to any one of claims 1 to 3, It is characterized in that include: Placing a first substrate, a second substrate and a side panel having a hollow structure in a forming mold, wherein the forming mold matches the first substrate and the second substrate; Heating the fusion portion until it has fluidity, and injecting the fusion portion between the first substrate and the second substrate along the water inlet of the connecting block; Blowing air toward the fusion portion along the water inlet of the connection block to form a battery pack cooling plate having a coolant channel; Placing a plurality of the battery pack cooling plates on a cooling plate support of a cooling box; The water inlet is connected to the liquid supply branch pipe of the diversion mechanism by using buckles, and the water outlet is connected to the return branch pipe.

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