阅读说明：本技术 一种管道连接结构及电池包水冷系统 (Pipeline connection structure and battery package water cooling system ) 是由 郑磊 陈亚健 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种管道连接结构及电池包水冷系统,涉及动力电池技术领域。该管道连接结构包括第一连接件、第二连接件、排气管和滤网,第一连接件包括连接的介质流入部和第一连接部,介质流入部内设介质流入通道,第一连接部内设有与介质流入通道连通的第一通道,介质流入通道的直径小于第一通道的直径；第二连接件包括介质流出部,介质流出部与第一连接部远离介质流入部的一端连接,介质流出部内设有与第一通道连通的介质流出通道,介质流出通道的直径小于第一通道的直径；排气管与第一通道连通；滤网固定于第一通道内。该管道连接结构能对流通的介质进行过滤,避免堵塞,提高系统使用安全性,还能对系统内的气体进行排空,提高机组使用性能。(The invention discloses a pipeline connecting structure and a battery pack water cooling system, and relates to the technical field of power batteries. The pipeline connecting structure comprises a first connecting piece, a second connecting piece, an exhaust pipe and a filter screen, wherein the first connecting piece comprises a medium inflow part and a first connecting part which are connected, a medium inflow channel is arranged in the medium inflow part, a first channel communicated with the medium inflow channel is arranged in the first connecting part, and the diameter of the medium inflow channel is smaller than that of the first channel; the second connecting piece comprises a medium outflow part, the medium outflow part is connected with one end, far away from the medium inflow part, of the first connecting part, a medium outflow channel communicated with the first channel is arranged in the medium outflow part, and the diameter of the medium outflow channel is smaller than that of the first channel; the exhaust pipe is communicated with the first channel; the filter screen is fixed in the first channel. This pipe connection structure can filter the medium of circulation, avoids blockking up, improves system safety in utilization, can also carry out the evacuation to the gas in the system, improves unit performance.)

1. A pipe connecting structure, comprising:

the first connecting piece (1) comprises a medium inflow part (11) and a first connecting part (12) which are fixedly connected, wherein a medium inflow channel (111) is arranged in the medium inflow part (11), a first channel (121) communicated with the medium inflow channel (111) is arranged in the first connecting part (12), and the diameter of the medium inflow channel (111) is smaller than that of the first channel (121);

the second connecting piece (2) comprises a medium outflow part (22), the medium outflow part (22) is connected with one end, away from the medium inflow part (11), of the first connecting part (12), a medium outflow channel (221) communicated with the first channel (121) is arranged in the medium outflow part (22), and the diameter of the medium outflow channel (221) is smaller than that of the first channel (121);

an exhaust pipe (3) communicating with the first passage (121) for exhausting gas in the medium;

a screen (4) secured within the first channel (121) to filter the media.

2. The pipe connecting structure according to claim 1, wherein the second connecting member (2) further comprises a second connecting portion (21), the second connecting portion (21) and the medium outflow portion (22) are fixedly connected, one end of the second connecting portion (21) away from the medium outflow portion (22) is connected to the first connecting portion (12), and a second passage (211) communicating with the first passage (121) and the medium outflow passage (221) is provided in the second connecting portion (21).

3. The pipe connection according to claim 2, wherein the screen (4) is provided at a communication of the first passage (121) and the second passage (211).

4. The pipe connecting structure according to claim 2 or 3, wherein an annular protrusion (213) is provided on the outer periphery of the second connecting portion (21), and the annular protrusion (213) abuts against the side wall of the first connecting portion (12).

5. The pipe connection according to any one of claims 1 to 4, wherein the first passage (121) and the second passage (211) are equal in diameter and are coaxially arranged.

6. A pipe connecting structure according to claim 2 or 3, wherein said first connecting portion (12) is detachably connected to said second connecting portion (21).

7. A pipe connection according to any one of claims 1-3, wherein at least one of the first connection member (1) and the second connection member (2) is of a transparent material.

8. A water cooling system in a battery pack, comprising the pipe connection structure according to any one of claims 1 to 7.

9. The battery pack water cooling system of claim 8, further comprising:

a circulation water path (5), wherein the medium inflow part (11) and the medium outflow part (22) of the pipe connection structure are respectively communicated with the circulation water path (5);

a water pump (7) provided on the circulation water path (5);

the water replenishing tank (6) is provided with an exhaust port, and the exhaust pipe (3) is communicated with the exhaust port.

10. The battery pack water cooling system according to claim 9, wherein the pipe connection structure is located at the highest position of the circulation water path (5).

Technical Field

The invention relates to the technical field of power batteries, in particular to a pipeline connecting structure and a battery pack water cooling system.

Background

In recent years, power batteries have been widely used in electric cars, electric motorcycles, electric bicycles, solar energy, mobile communication terminal products, energy storage products, and the like. With the popularization of power batteries, rapid charging has become a continuous pursuit target. The existing quick charging technology reduces the charging time by charging with large current, and the large current charging can cause the rapid temperature rise of a single battery, thereby seriously affecting the service life of a battery pack. In addition, the heat generated during the discharging process of the battery can also cause the temperature of the battery pack to be too high, and the discharging performance of the battery pack is affected. Therefore, the cooling system is suitable for a large amount of applications of the water cooling system for cooling the battery pack in the whole vehicle.

When the existing water cooling system cools the battery pack, the water supplementing tank supplements water to the circulating water path, the water pump drives the circulating water path to circulate, the circulating water path is connected with the cooling module and the battery pack to be cooled, water flows through the battery pack after being cooled by the cooling module, so that the battery pack is cooled, and the cooled water flows back to the cooling module through the circulating water path to be cooled again, thereby forming the battery pack circulating cooling system.

Although the cooling effect of the existing water cooling system is obvious, dirt and microorganisms may exist in water, and the circulating water path is blocked or corroded to cause pipe bursting and leakage. In addition, the gas that exists in the pipeline can influence the performance of water cooling system, and firstly, when the water cooling system was installed the liquid feeding for the first time, there is gas in its pipeline and can lead to the liquid feeding difficulty, and secondly, the bubble of doping in pipeline circulating water is difficult to the evacuation and still can influence the cooling performance of water cooling system to the battery package.

Accordingly, there is a need for a pipe connection structure and a water cooling system for a battery pack to solve the above problems.

Disclosure of Invention

The invention aims to provide a pipeline connecting structure and a battery pack water cooling system, which can filter circulating media, avoid blockage, improve the use safety of the system, evacuate gas in the system and improve the service performance of a unit.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pipe connecting structure comprising:

the first connecting piece comprises a medium inflow part and a first connecting part which are fixedly connected, wherein a medium inflow channel is arranged in the medium inflow part, a first channel communicated with the medium inflow channel is arranged in the first connecting part, and the diameter of the medium inflow channel is smaller than that of the first channel;

the second connecting piece comprises a medium outflow part, the medium outflow part is connected with one end, far away from the medium inflow part, of the first connecting part, a medium outflow channel communicated with the first channel is arranged in the medium outflow part, and the diameter of the medium outflow channel is smaller than that of the first channel;

the exhaust pipe is communicated with the first channel and is used for exhausting gas in the medium;

a filter screen secured within the first channel to filter the media.

Optionally, the second connecting piece further includes a second connecting portion, the second connecting portion is fixedly connected to the medium outflow portion, one end of the second connecting portion, which is far away from the medium outflow portion, is connected to the first connecting portion, and a second passage, which is communicated with the first passage and the medium outflow passage, is provided in the second connecting portion.

Optionally, the filter screen is disposed at a communication position of the first channel and the second channel.

Optionally, an annular protrusion is disposed on the periphery of the second connecting portion, and the annular protrusion abuts against the side wall of the first connecting portion.

Optionally, the first channel and the second channel are of equal diameter and are coaxially arranged.

Optionally, the first connecting portion is detachably connected to the second connecting portion.

Optionally, at least one of the first connecting piece and the second connecting piece is made of a transparent material.

A battery package water-cooling system comprises the pipeline connecting structure.

Optionally, the battery pack water cooling system further includes:

a circulation water path, the medium inflow part and the medium outflow part of the pipe connection structure being communicated with the circulation water path, respectively;

the water pump is arranged on the circulating water path;

the water replenishing tank is provided with an exhaust port, and the exhaust pipe is communicated with the exhaust port.

Optionally, the pipe connection structure is located at the highest position of the circulating waterway.

The invention has the beneficial effects that:

1) the exhaust pipe is communicated with the first channel, so that when the system is initially added with the medium, gas in the pipeline can be exhausted through the exhaust pipe, and the adding operation of the medium is facilitated.

2) The diameter of the first channel is larger than the diameters of the medium inflow channel and the medium outflow channel, the gas overflow cavity is formed at the first channel, when the medium flows into the first channel from the medium inflow channel, the flow rate of the medium is reduced, so that the siphon effect generated by the excessively high flow rate of the medium is broken, bubbles in the medium overflow, the overflowed gas passes through the exhaust pipe discharge system, the medium after overflowing the bubbles is discharged from the medium outflow channel, the evacuation of the gas in the medium is realized, and the service performance of the system is enhanced.

3) The filter screen is arranged in the first channel to filter the passing medium, so that the risk of pipe burst leakage caused by blockage or corrosion is eliminated, and the use safety of the system is improved.

Drawings

Fig. 1 is a schematic structural view of the whole of a pipe connection structure provided by an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a pipe connection structure provided in an embodiment of the present invention;

fig. 3 is a schematic view of the overall structure of a battery pack water cooling system according to an embodiment of the present invention.

In the figure:

100. a battery pack;

1. a first connecting member; 11. a medium inflow portion; 111. a medium inflow channel; 12. a first connection portion; 121. a first channel; 2. a second connecting member; 21. a second connecting portion; 211. a second channel; 212. an external thread; 213. an annular projection; 22. a medium outflow portion; 221. a medium outflow channel; 3. an exhaust pipe; 4. filtering with a screen; 5. a circulating water path; 51. a first water delivery pipe; 52. a second water delivery pipe; 6. a water replenishing tank; 61. an overflow pipe; 7. a water pump; 8. and a cooling device.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 and fig. 2, the pipe connection structure disclosed in this embodiment includes a first connection member 1, a second connection member 2, an exhaust pipe 3 and a filter screen 4, the first connection member 1 is connected to the second connection member 2, the exhaust pipe 3 is communicated with the first connection member 1, and the filter screen 4 is disposed in the first connection member 1. Illustratively, the first connecting member 1 includes a fixedly connected medium inflow portion 11 and a first connecting portion 12, a medium inflow passage 111 is provided in the medium inflow portion 11 for the medium to pass through, a first passage 121 communicating with the medium inflow passage 111 is provided in the first connecting portion 12, and the diameter of the medium inflow passage 111 is smaller than that of the first passage 121. The second connector 2 includes a medium outflow portion 22, the medium outflow portion 22 is connected to an end of the first connector 12 away from the medium inflow portion 11, and a medium outflow channel 221 communicating with the first channel 121 is provided in the medium outflow portion 22 to discharge the bubble-discharging medium from the medium outflow channel 221. The diameter of the medium outflow channel 221 is smaller than that of the first channel 121, so that the first channel 121 forms a gas overflow cavity, and when the medium flows from the medium inflow channel 111 to the first channel 121, the flow rate of the medium decreases, so that a siphon effect generated by an excessively high flow rate of the medium is broken, bubbles in the medium can overflow and are discharged from the exhaust pipe 3, and the medium after overflowing the bubbles is discharged from the medium outflow channel 221, so that the gas in the whole system is emptied, and the service performance of the system is enhanced. The exhaust pipe 3 communicates with the first passage 121 for continuously exhausting the gas in the system. The filter screen 4 is fixed in first passageway 121 to filter the medium, avoid impurity jam, booster weeping, improve the safety in utilization.

In this embodiment, the medium is water, and when water flows into the first channel 121 through the medium inflow channel 111, the flow rate is reduced, so that the siphon effect generated by water is broken, bubbles in water overflow and are discharged through the exhaust pipe 3, and the water overflowing the bubbles is discharged through the medium outflow channel 221 until the gas in the whole system is emptied when the exhaust pipe 3 is not discharged, thereby ensuring the use performance of the system. In other embodiments, the medium may be selected from suitable liquids according to actual requirements, and is not limited to this embodiment.

Alternatively, the medium inflow portion 11 is a cylindrical pipe body made of stainless steel.

Correspondingly, the first connecting portion 12 is also a cylindrical tube body, which is made of stainless steel. The first connecting portion 12 is welded to the medium inflow portion 11, and the first channel 121 is coaxially disposed with the medium inflow channel 111, so that water flows from the medium inflow channel 111 to the first channel 121.

Further, the medium outflow portion 22 is a cylindrical pipe body made of stainless steel. The medium outflow channel 221, the first channel 121, and the medium inflow channel 111 are coaxially disposed. The medium outflow channel 221 is communicated with the medium inflow channel 111 through the first channel 121, and the liquid level heights of the three channels are kept consistent, so that the exhaust stability of the system is improved.

The second connector 2 further comprises a second connecting portion 21, the second connecting portion 21 is fixedly connected with the medium outflow portion 22, one end, far away from the medium outflow portion 22, of the second connecting portion 21 is connected with the first connecting portion 12, and a second channel 211 communicated with the first channel 121 and the medium outflow channel 221 is arranged in the second connecting portion 21 so as to facilitate water flow.

Accordingly, the second connecting portion 21 is adapted to the shape and size of the first connecting portion 12 to facilitate the connection therebetween. Alternatively, the second connection portion 21 is detachably connected, preferably screwed, to the first connection portion 12, i.e. one of the second connection portion 21 and the first connection portion 12 is provided with an internal thread and the other is provided with an external thread 212 matching the internal thread. In this embodiment, the inner wall of the first connecting portion 12 is provided with an internal thread, the outer periphery of the second connecting portion 21 is provided with an external thread 212, and the second connecting portion 21 is screwed into the first connecting portion 12 to realize thread fixing.

Further, the outer periphery of the second connecting portion 21 is provided with an annular protrusion 213, and the annular protrusion 213 is provided at one end of the external thread 212 far from the first connecting portion 12. When the second connection portion 21 is screwed with the first connection portion 12, the annular protrusion 213 abuts against the sidewall of the first connection portion 12 to enhance the sealing property of the connection therebetween.

Optionally, the first channel 121 and the second channel 211 have the same diameter and are coaxially disposed, so that the water flow smoothly passes through the communication between the first channel 121 and the second channel 211.

Optionally, at least one of the first connecting member 1 and the second connecting member 2 is made of a transparent material, so that a user can conveniently check the operation condition of the system and the filth blockage condition of the filter screen 4 to replace and clean the filter screen 4. In this embodiment, the first connecting member 1 and the second connecting member 2 are both made of transparent materials, so as to better observe the filter screen 4 and the system operation condition.

Optionally, the filter screen 4 is a stainless steel filter screen, which ensures sufficient strength and can withstand a certain water flow impact force. The filter screen 4 is circular, and the diameter thereof is larger than that of the first channel 121, so that the filter screen can be firmly clamped on the inner wall of the first channel 121. Further, the filter screen 4 is detachably disposed in the first passage 121, so that the filter screen 4 is detached for replacement or cleaning when impurities or corrosion are accumulated to a certain degree. Illustratively, the filter screen 4 is disposed at a communication position of the first channel 121 and the second channel 211, and both sides of the filter screen 4 are fixed by the mutual abutting action of the first connecting portion 12 and the second connecting portion 21. When the filter screen is disassembled, the filter screen 4 can be disassembled by disassembling the first connecting part 12 and the second connecting part 21, and the disassembly is very convenient.

The exhaust pipe 3 is connected to the portion above the liquid level of the first channel 121, so that the gas overflowing from the water can be continuously exhausted, and the water can be prevented from flowing into the exhaust pipe 3. And one end of the exhaust pipe 3 away from the first passage 121 communicates with the outside to continuously exhaust the gas in the system to the outside.

The embodiment of the invention also provides a battery pack water cooling system which comprises the pipeline connecting structure.

As shown in fig. 3, the battery pack water cooling system further includes a circulation water path 5, a water pump 7, and a water replenishing tank 6, wherein the medium inflow portion 11 and the medium outflow portion 22 of the pipe connection structure are respectively communicated with the circulation water path 5 to evacuate gas in the circulation water path 5, and the water pump 7 is disposed on the circulation water path 5 to provide circulation power to the entire circulation water path 5. Be equipped with the gas vent on the moisturizing case 6, the one end and the gas vent intercommunication of first connecting portion 12 are kept away from to blast pipe 3 to the gas in will circulating water route 5 is discharged into moisturizing case 6 through blast pipe 3, and is discharged through the gas vent.

Preferably, the pipe connection structure is located at the highest position of the circulating water path 5 to gather the gas in the whole circulating water path 5, so that the gas is conveniently discharged through the pipe connection structure.

Further, the circulating water path 5 includes a first water pipe 51 and a second water pipe 52, and the first water pipe 51 is communicated with the second water pipe 52 through a pipe connection structure to form a closed circulating water path 5. Specifically, the first water duct 51 communicates with the medium outflow passage 221, and the second water duct 52 communicates with the medium inflow passage 111. Further, the first water delivery pipe 51 communicates with the water replenishing tank 6 to continuously replenish the circulating water path 5 with water.

Optionally, the water pump 7 continuously pumps water to the battery pack 100 through the first water pipe 51, and then flows into the first channel 121 through the second water pipe 52, and meanwhile, the water exhausted by the first channel 121 flows out from the medium outflow channel 221, and circulates in the circulation water path 5 through the action of the water pump 7, so that the fluidity of the water in the first channel 121 is ensured, and the exhaust function of the exhaust pipe 3 is ensured.

The first water delivery pipe 51 is further provided with a cooling device 8, and the cooling device 8 cools water and continuously outputs cooling water. The cooling water flows to the battery pack 100 through the first water delivery pipe 51 to cool the battery pack. Since the structure and installation of the cooling device 8 are prior art, they will not be described in detail here.

Accordingly, both ends of the second water duct 52 communicate with the battery pack 100 and the medium inflow passage 111, respectively, to achieve circulation cooling of the battery pack 100 by water.

Further, the water replenishing tank 6 is an expansion water tank, and when the water pressure in the system slightly changes, the expansion water tank can buffer the water pressure change through self expansion or contraction, so that the whole system is stabilized. Optionally, the expansion tank is located higher than the installation location of the circulating water path 5 and the pipe connection structure, so as to facilitate automatic water replenishing by using the self-gravity of water.

Further, an overflow pipe 61 is connected to the water replenishing tank 6 to discharge excess water in the water replenishing tank 6, so that the liquid level of the water replenishing tank 6 is at a preset position.

In order to facilitate understanding of the present invention, the pipe connection structure and the exhaust principle thereof on the water cooling system of the battery pack provided in this embodiment are explained as follows:

when water is added to the circulating water path 5 in the initial state, the gas flows to the high position due to low density and light weight of the gas, and the continuously added water forces the gas to gather towards the pipeline connecting structure at the high position, flows to the expansion water tank through the exhaust pipe 3 and is discharged through the exhaust port.

And for part of bubbles mixed with water in the circulating water path 5, when the bubbles pass through the pipeline connecting structure, the siphon effect of the water is broken, so that the bubbles doped in the water can overflow from the water and are discharged through the exhaust pipe 3, and when the exhaust pipe 3 is observed to be not discharged with gas, the gas in the circulating water path 5 is indicated to be emptied.

Therefore, the pipeline connecting structure provided by the invention improves the use safety of the system by arranging the filter screen 4 in the first connecting part 12 to filter media. The exhaust pipe 3 is provided to communicate with the second passage 211 to exhaust gas in the system when the system initially adds a medium, facilitating the adding operation of the medium. The diameter of the first channel 121 is further set to be larger than the diameters of the medium inflow channel 111 and the medium outflow channel 221, so that the first channel 121 forms a gas overflow cavity, when the medium flows into the first channel 121 from the medium inflow channel 111, the flow rate of the medium is reduced, the siphon effect caused by the excessively high flow rate of the medium is broken, bubbles in the medium can overflow and are discharged through the exhaust pipe 3, and the medium after overflowing the bubbles is discharged from the medium outflow channel 221, so that the gas in the whole system is emptied, and the service performance of the system is enhanced.

At least one of the first connecting piece 1 and the second connecting piece 2 is made of transparent materials, so that a user can conveniently check the running condition of the system and the filth blockage condition of the filter screen 4, and the filter screen 4 can be replaced and cleaned.

According to the battery pack water cooling system provided by the invention, the pipeline connecting structure is arranged at the highest point of the circulating water channel 5, so that gas is gathered at the highest point, and the gas is conveniently discharged through the pipeline connecting structure.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.