CN114843659A - Battery water cooling plate, battery pack and battery pack installation method - Google Patents

Abstract

The invention relates to the technical field of battery packs, and discloses a battery water cooling plate, a battery pack and a battery pack installation method, comprising: a frame, the side wall of which is provided with a water inlet and a water outlet; There are several cavities in the cooling plate, some of which are the first cavities for the circulation of cooling liquid, and the remaining cavities are the second cavities, and the adjacent first cavities are connected to each other. A first flow channel is formed, and the non-adjacent first flow channels are connected through the conversion block, and the water inlet and the water outlet are respectively connected to different first flow channels. The invention has the following advantages and effects: because the non-adjacent flow channels are connected by the conversion block, the cooling liquid can be prevented from passing through unnecessary flow channels, the friction loss of the cooling liquid is reduced, and the energy consumption of the cooling system is reduced , while improving the cooling effect of the coolant. At the same time, a variety of battery packs can use the same cooling plate, which reduces the cost of design and procurement.

Description

A battery water cooling plate, battery pack and battery pack installation method

technical field

The present application relates to the technical field of battery packs, in particular to a battery water cooling plate, a battery pack and a battery pack installation method.

Background technique

At present, in recent years, there are more and more brands of new energy pure electric vehicles, and people's acceptance of pure electric vehicles is also increasing. Gradually switch to pure electric vehicles. Under this general trend, it is particularly important to focus on and improve the lithium battery pack, one of the core components of pure electric vehicles, because it is the carrier of the power source of new energy pure electric vehicles, and its quality is directly related to electric vehicles. the pros and cons.

The on-board battery pack powers the vehicle while driving. During driving, the on-board battery pack will heat up, and when the temperature of the on-board battery pack is too high, certain safety hazards will occur. Therefore, in the prior art, a cooling plate is generally provided inside the vehicle-mounted battery pack to cool the vehicle-mounted battery pack.

However, when the water-cooled plate is actually used, the heat distribution of different battery packs is different due to factors such as the calorific value of the battery, the structure of the battery pack, and the power consumption. In this way, the cavity inside the profile is used as the flow channel for the cooling liquid, many of which are unnecessary for heat exchange. If the cooling liquid passes through these flow channels, on the one hand, a lot of friction loss will be generated, which improves the performance of the water cooling system. On the other hand, the coolant absorbs heat at unnecessary locations to increase the temperature, so that the heat exchange capacity and cooling effect are reduced at the location where cooling is required.

SUMMARY OF THE INVENTION

In view of the defects existing in the prior art, the purpose of the present application is to provide a battery water cooling plate, a battery pack and a battery pack installation method, which can connect non-adjacent cavities so that the cooling liquid does not need to undergo unnecessary cooling. cavity.

In order to achieve the above goals, on the one hand, the technical solutions adopted are:

The application provides a battery water cooling plate, including:

a frame, the side wall of which is provided with a water inlet and a water outlet;

There are one or more cooling plates installed in the frame. There are several cavities in the cooling plate. Some of the cavities are the first cavity for the circulation of the cooling liquid, and the rest of the cavities are the second cavity. The adjacent first cavities are connected to form a first flow channel, and the non-adjacent first flow channels are connected through the conversion block, and the water inlet and the water outlet are respectively connected to different first flow channels.

Preferably, the frame includes two mounting side beams parallel to the direction of the cavity and two structural side beams perpendicular to the direction of the mold cavity, and the mounting side beams and the structural side beams are fixedly connected.

Preferably, the top surface of each of the mounting side beams is provided with a plurality of mounting holes for mounting the battery cover.

Preferably, reinforcing ribs are provided in the installation side beam.

Preferably, the frame further includes:

There are one or more reinforced middle beams, and the two ends are respectively connected to the installation side beams.

Preferably, the structural side beam is provided with a conversion card slot for accommodating the conversion card block.

Preferably, reinforcing beams are provided on the side walls of the structural side beams close to the cooling plate, and the reinforcing beams and the structural side beams together form a stepped shape.

Preferably, the conversion block is provided with a shunt channel, and the bottom surface of the conversion block is provided with a plurality of second shunt holes communicating with the shunt channel;

A first shunt hole is provided at the beginning and/or the end of the first flow channel;

When the conversion card blocks communicate with different first flow channels, each second flow distribution hole communicates with one first flow distribution hole.

On the other hand, the present application also provides a battery pack, wherein the battery pack includes the aforementioned battery water cooling plate.

On the other hand, the present application also provides an installation method based on the aforementioned battery pack, comprising the following steps:

Divide the heating area according to the preset battery distribution mode in the battery pack;

A first cavity is selected from the cavity according to the heating area, and holes are punched between adjacent first cavities to form a connected first flow channel;

Drill holes on different first flow channels according to the size of the conversion card block, and install the conversion card block to make the different first flow channels communicate;

Install batteries on the battery water cooling plate according to the preset battery distribution to form a battery pack.

The beneficial effects brought by the technical solution provided by this application include:

The battery water-cooling plate, the battery pack and the battery pack installation method of the present application, because the non-adjacent flow channels are connected by the conversion card block, the cooling liquid can be prevented from passing through unnecessary flow channels, and the friction loss of the cooling liquid can be reduced. The energy consumption of the cooling system is reduced, and the cooling effect of the coolant is improved at the same time.

At the same time, the designer of the battery pack can freely choose which flow channels to distribute the coolant according to the position, working conditions and the characteristics of the battery pack itself. One shunt hole is enough, and there is no need to significantly modify the structure of the cooling plate. Multiple battery packs can use the same cooling plate, which reduces the cost of design and procurement.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of an embodiment of the application.

FIG. 2 is a schematic structural diagram of the separation of the conversion card block and the frame in the embodiment shown in FIG. 1 .

FIG. 3 is a schematic diagram of the installation of the cooling plate and the conversion card block in FIG. 2 .

FIG. 4 is a schematic cross-sectional view of the structural side beam in FIG. 1 that is provided with a converting slot.

FIG. 5 is an enlarged schematic view of FIG. 4 .

FIG. 6 is an exploded schematic diagram of FIG. 1 .

Reference number:

1. Frame; 11. Mounting side beams; 111. Mounting holes; 112. Fixing holes; 113. Reinforcing ribs; 12. Structural side beams; reserved slot; 15, end head; 2, cooling plate; 21, first flow channel; 22, first distribution hole; 3, conversion block; 31, distribution channel; 32, second distribution hole.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

In this application, an embodiment of a battery water cooling plate is provided, including a frame 1 and a cooling plate 2, and the number of cooling plates 2 is one or more. In this embodiment and subsequent embodiments, the medium used for cooling is introduced by selecting water as a representative, and those skilled in the art may select other suitable liquids as the cooling medium according to actual needs.

Specifically, in this embodiment, referring to FIG. 1 , FIG. 3 , FIG. 4 and FIG. 6 , there are three cooling plates 2 , two of which are fixed on the edge of the frame 1 , and the middle one is connected to the frame 1 through various connecting structures , for example, the cooling plate 2 is screwed to the frame 1 by means of bolts.

There are multiple cavities in the cooling plate 2, the cavities are cavities opened along the length of the cooling plate 2, and the cavities are evenly and densely distributed along the width direction. It should be noted that in general, the size and shape of the cavities are The same, so some cavities will be located at the junction of the two cooling plates 2. At this time, a part will be opened at the edge of the intersection of the two cooling plates 2. After the two cooling plates 2 are assembled, a complete shape will be formed. cavity. In some embodiments, since the cavity formed by splicing two cooling plates 2 in this way has the risk of water leakage, the size of the cavity close to the edge is also reduced to ensure that the cavity is all inside the cooling plate 2 .

In the actual use process, the user will design the battery pack according to their own needs, that is, the battery has a certain arrangement direction and order, some places have more batteries, some places have less batteries, and correspondingly, some places are heated by the battery In the cooling process, the overall temperature of the battery only needs to be below a certain temperature, and the cooling water will also absorb heat in places with a low temperature, resulting in the cooling water in a place with a high temperature. The heat exchange capacity is poor, and the battery cannot effectively cool down, so it affects the use of the battery.

Therefore, before using this embodiment, according to the given battery pack design style, only part of the cavity is selected for cooling, this part of the cavity is called the first cavity, and the rest is not used for cooling, this part is called the first cavity Two cavity. Adjacent first cavities are generally perforated at the head or tail, so that two adjacent first cavities are connected, and a plurality of first cavities are connected end to end so as to pass through the first flow channel 21 . However, due to the limitation of the design of the battery pack, the second cavity may be included in the first cavity, and the first cavity and the second cavity are completely isolated, and there is no cooling water in the second cavity. , so the second cavity divides the entire cooling plate 2 into two or more regions according to whether cooling water is to be circulated. They are isolated from each other and cannot be directly connected, so a conversion block 3 is also provided to connect the non-adjacent first flow channels 21 . Specifically, the conversion block 3 can either connect different first flow channels 21 in series, or can connect multiple first flow channels 21 in parallel by means of one input and multiple output.

In actual use, the weight of the general battery pack is very large, and when there are some bumps in the use environment, bending moment and torque will be generated on the entire water-cooling plate, and the cavity constitutes a structure similar to a beam, and its bending resistance is strong. But the torsion resistance is poor.

Therefore, in some preferred embodiments, the above-mentioned frame 1 includes an installation side beam 11 parallel to the direction of the flow channel, and a structural side beam 12 perpendicular to the direction of the cavity, and the position between the installation side beam 11 and the structural side beam 12 They need to be relatively fixed, so the two are generally fixed by welding, but in some embodiments, the installation side beam 11 and the structural side beam 12 can also be relatively fixed by other methods such as detachable connection of connectors, structural cementation or integral molding, etc. fixed.

Specifically, because the shape of the cavity itself is roughly a square tube, its bearing capacity is similar to that of a box beam, and it has a certain bending resistance, so the installation side beams 11 on both sides do not need to have strong strength, and are suitable for installation, Connect other accessory parts, but the connection relationship between the cavities is not strong, and the torsion resistance of the entire cooling plate 2 is poor, so the structural edge beams 12 at both ends of the cavity should be selected with high strength and stronger structure. The holes that easily reduce the torsional resistance are reduced, so generally no other components are installed on the structural edge beam 12 .

In one of the preferred embodiments, the battery needs to be dust-proof, dust-proof and anti-collision, so a battery cover should be provided on the battery pack. Install the mounting holes 111 of the battery cover.

In other preferred embodiments, the battery generally needs to be fixed when it is in use. The battery generally has a bracket to assist in fixing, but the water-cooling plate does not. It is only fixed by the weight of the battery. There may be deviation in long-term use. The beam 11 is provided with a fixing hole 112 for fixing the entire battery water cooling plate in a specific position.

In some application scenarios, such as when the electric vehicle makes a sharp turn, the forces at both ends of the water-cooling plate are completely different, and it is easy to twist the mounting side beam 11, so there are certain requirements for the strength of the mounting side beam 11 itself, so there are some preferred In the embodiment shown in FIG. 1 , reinforcing ribs 113 are arranged in the mounting side beam 11 . Specifically, the reinforcing ribs 113 are arranged along the diagonal of the cross-section of the mounting side beam 11 .

In some preferred embodiments, due to the heavy weight of the battery, the overall movement is required in some usage scenarios, such as being installed on an electric vehicle, the battery will impact the frame 1 during the movement, especially in a long water-cooling plate. , the middle of the installation side beam 11 is difficult to be protected by the structural side beam 12, and it is easy to change shape. Therefore, the frame 1 also includes at least one reinforced middle beam 13, and the two ends of the reinforced middle beam 13 are connected to the installation side beam 11. When the frame 1 is impacted, the mounting side beam 11 is pulled to the middle to prolong the service life of the frame 1 .

In some embodiments, the position of the conversion card block 3 is within the frame 1, but this not only needs to reserve the installation space of the conversion card block 3, but also needs to prevent the whole structure from shaking and impacting the conversion card block 3 when the whole structure is in motion. , so that a certain space needs to be reserved around the conversion card block 3, which generally limits the use space of the battery pack. In still other embodiments, the conversion block 3 is located outside the frame 1, which increases the footprint of the entire battery water cooling plate, and the conversion block 3 has no protection measures, which can easily cause water leakage due to foreign objects during use.

Therefore, in some preferred embodiments, as shown in FIG. 2 and FIG. 4 , the structural side beam 12 is provided with the same number of conversion card slots 121 as the conversion card blocks 3 , and each conversion card slot 121 corresponds to a conversion card block 3. In this way, the conversion card block 3 can be plugged in, and the conversion card block 3 is protected by the structural side beam 12, and the installation space of the internal battery pack is avoided at the same time.

In some actual use processes, in order to maximize the bending resistance of the cavity, a group of batteries is generally arranged according to the length of the cavity. At the same time, due to the uneven distribution of the batteries in the battery pack, during the driving process of the car, the structure of each group of batteries is not equal. The impact and compression of the side beams 12 are different, so that the structural side beams 12 also need to bear different magnitudes of shear force and torsion force.

Therefore, in some preferred embodiments, reinforcing beams 14 are provided on the side walls of the structural side beams 12 close to the cooling plate 2 , and the reinforcing beams 14 and the structural side beams 12 together form a stepped shape. Specifically, referring to FIG. 2 , the structure of the reinforcing beam 14 is generally designed according to the force, not a regular cuboid, and there are some holes for assisting the installation of the entire side beam and the water cooling plate.

In some embodiments, the conversion card block 3 is provided with a shunt channel 31 , as shown in FIG. 4 , the function of the shunt channel 31 is to allow the cooling liquid to circulate, and a plurality of second shunt holes 32 are provided at the bottom of the conversion card block 3 . , the second distribution hole 32 is for cooling water to enter and exit the distribution channel 31 . The first shunt hole 22 is provided at the beginning and/or the end of the first flow channel 21 . When the conversion card block 3 is installed, the second shunt hole 32 on the conversion card block 3 corresponds to the first shunt hole of the first flow channel 21 . 22 are aligned such that the plurality of first streams communicate with each other. Specifically, in the embodiments shown in FIGS. 3 and 4 , the bottom of the conversion card block 3 has only two second shunt holes 32 , which are connected to the two first shunt holes 22 . After the conversion card block 3 is installed, The two first flow channels 21 communicate with each other across the middle second cavity. There are also some embodiments that can realize the form of one input and multiple outputs. For example, three second distribution holes 32 are arranged at the bottom of the conversion card block 3, which are respectively connected to the three first flow channels 21, and one of the first flow channels 21 is connected to the water inlet. When connected, a structure of one input and two outputs is formed, and the remaining two first flow channels 21 are connected in parallel. The friction loss of a single portion of water is reduced, and the two parallel first flow channels 21 can also be connected through a conversion block 3 and sent to the first flow channel 21 connected to the water outlet, thus realizing a multi-in and one-out flow. Effect. In the implementation process, you can design and change the direction of coolant flow according to your needs.

In some actual use processes, the external cooling water pipes are easily loosened due to bumps during the driving process of the vehicle, so in some preferred embodiments, the above-mentioned water inlet and water outlet are provided with terminals 15 for enhancing connectivity, which can effectively Improve the connection force between the water inlet, the water outlet and the external pipeline to prevent the pipeline from disengaging.

The present application also provides an embodiment of a battery pack, where any one of the battery water cooling plates provided in the present application is applied to the battery pack.

The present application also provides an embodiment of a battery pack installation method, comprising the following steps:

The heating area is divided according to a preset battery distribution mode in the battery pack. Specifically, the batteries are arranged in a certain order in the battery pack according to the needs, and the arrangement of the batteries is determined in advance according to the needs. For example, in this application, 30 batteries can be set, and 15 batteries are arranged in a row. Arrange two columns with a certain distance between the two columns to place other structures, and the specific heating area is only the bottom of the two columns of batteries and the area where the bottom radiates a certain distance. The middle area of the two columns of batteries does not generate heat and is heated There is also very little, so there is no need to circulate the coolant, which reduces the friction of the coolant flow, and also reduces the energy consumption.

A first cavity is selected from the cavity according to the heating area, and holes are punched between adjacent first cavities to form a communicating first flow channel 21 . Under normal circumstances, the frame 1 at both ends of the cooling plate 2 can be removed to expose the cavity for secondary processing. At this time, holes can be drilled on the inner wall of the adjacent first cavity. The hole diameter is calculated according to the flow rate. The two cavities are connected. Generally speaking, in the three cavities arranged in sequence, the openings should be at different ends to form baffles.

According to the size of the conversion card block 3 , holes are opened on different first flow channels 21 , and the conversion card block 3 is installed so that the different first flow channels 21 communicate with each other. Specifically, generally after the conversion card block 3 is installed, the position of the punched hole is calibrated, and the hole is communicated through the conversion card block 3 .

Install batteries on the battery water cooling plate according to the preset battery distribution to form a battery pack. In some embodiments, other structures, such as a battery cover, also need to be installed to form a battery pack.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the application and simplifying the description, Rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation on the application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply Any such actual relationship or sequence exists between these entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above descriptions are only specific embodiments of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A battery water-cooling plate, comprising:

the side wall of the frame (1) is provided with a water inlet and a water outlet;

the cooling plate (2) arranged in the frame (1) is provided with one or more cavities, one part of the cavities are first cavities for allowing cooling liquid to circulate, the rest cavities are second cavities, the adjacent first cavities are communicated and form first runners (21), the nonadjacent first runners (21) are communicated through the conversion fixture block (3), and the water inlet and the water outlet are respectively communicated with the different first runners (21).

2. The battery water-cooling plate as claimed in claim 1, wherein the frame (1) comprises two mounting edge beams (11) parallel to the cavity direction and two structural edge beams (12) perpendicular to the cavity direction, and the mounting edge beams (11) and the structural edge beams (12) are fixedly connected.

3. The water-cooling plate for the battery as claimed in claim 2, wherein: the top surface of each mounting side beam (11) is provided with a plurality of mounting holes (111) for mounting a battery cover.

4. The water-cooling plate for the battery as claimed in claim 2, wherein: and reinforcing ribs (113) are arranged in the mounting edge beam (11).

5. The water-cooling plate for the battery as claimed in claim 2, wherein the frame (1) further comprises:

and one or more reinforcing middle beams (13) are arranged, and two ends of each reinforcing middle beam are respectively connected with the mounting edge beam (11).

6. The battery water cooling plate as claimed in claim 2, wherein the structural edge beam (12) is provided with a conversion clamping groove (121) for accommodating the conversion clamping block (3).

7. The battery water-cooling plate as claimed in claim 2, characterized in that the side wall of the structural edge beam (12) close to the cooling plate (2) is provided with a reinforcing beam (14), and the reinforcing beam (14) and the structural edge beam (12) form a ladder shape together.

8. The water cooling plate for the battery as claimed in claim 1, wherein a shunt channel (31) is arranged in the conversion fixture block (3), and a plurality of second shunt holes (32) communicated with the shunt channel (31) are arranged on the bottom surface of the conversion fixture block (3);

the starting end and/or the tail end of the first flow passage (21) is/are provided with a first flow dividing hole (22);

when the switching block (3) connects different first flow passages (21), each of the second branch holes (32) communicates with one of the first branch holes (22).

9. A battery pack comprising the battery water-cooling plate according to any one of claims 1 to 8.

10. A method for mounting a battery pack according to claim 9, comprising the steps of:

dividing heating areas according to a preset battery distribution mode in the battery pack;

selecting first cavities from the cavities according to the heating area, and punching holes between the adjacent first cavities to form communicated first flow passages (21);

holes are formed in different first flow passages (21) according to the size of the conversion fixture block (3), and the conversion fixture block (3) is installed to enable the different first flow passages (21) to be communicated;

and installing batteries on the battery water cooling plate according to a preset battery distribution mode to form a battery pack.

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