Temperature control pipeline assembly and energy storage equipment

Abstract

The utility model provides a temperature control pipeline assembly and an energy storage device. The temperature control pipeline assembly comprises a liquid inlet pipeline unit and a liquid return pipeline unit. The liquid inlet pipeline unit and the liquid return pipeline unit are connected and combined through a multi-stage pipeline, so that a liquid medium flowing out of the temperature control device is divided stage by stage and is uniformly distributed to each battery module, and each battery cluster and each battery module in the battery cluster have good and balanced heat dissipation effects; therefore, the working stability and the service life of the energy storage equipment are improved.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and specifically relates to a temperature control pipeline component and energy storage equipment. Background Art

[0002] With the development of new energy sources such as solar energy and wind energy, energy storage technology has also developed. Lithium batteries have gradually become the mainstream product for energy storage due to their advantages such as high energy, long service life, high rated voltage, high power tolerance and low self-discharge rate.

[0003] In order to meet the different capacity requirements of energy storage equipment, existing energy storage equipment sets multiple battery modules in series and parallel. To improve energy density, multiple battery modules can be arranged in an array, for example, multiple battery modules are arranged in sequence in the horizontal direction to form a battery module unit, and then multiple battery module units are arranged in sequence in the vertical direction to form a battery cluster. Multiple battery clusters are arranged linearly in a battery compartment, and each energy storage box includes multiple battery compartments.

[0004] With the large-scale application of lithium battery energy storage equipment, the safe use of lithium-ion batteries has also attracted attention. In order to ensure the safe and reliable operation of energy storage equipment, the energy storage equipment is equipped with a temperature control system to control the temperature of each battery module in the energy storage equipment, so that each battery module always works in a suitable temperature environment.

[0005] At present, there is an urgent need to provide a temperature control pipeline assembly to provide a relatively balanced liquid medium for each battery module in the above-mentioned energy storage device, so that each battery module in the energy storage device can work stably. Utility Model Content

[0006] The utility model provides a temperature control pipeline component and an energy storage device, which provide a relatively balanced liquid medium for each battery module in the energy storage device, so that each battery module in the energy storage device can work stably.

[0007] In order to solve the above problems, the technical solution provided by the utility model is:

[0008] A temperature control pipeline assembly, comprising a liquid inlet pipeline unit and a liquid return pipeline unit; the liquid inlet pipeline unit comprises a primary liquid inlet pipe, a secondary liquid inlet pipe, a tertiary liquid inlet pipe, a quaternary liquid inlet pipe, a fifth liquid inlet pipe and a sixth liquid inlet pipe; the inlet of the primary liquid inlet pipe is used to be connected to a temperature control device; the secondary liquid inlet pipe is used to shunt the liquid medium in the primary liquid inlet pipe to a plurality of battery compartments; the tertiary liquid inlet pipe is used to shunt the liquid medium in the secondary liquid inlet pipe to a plurality of battery clusters; the quaternary liquid inlet pipe is used to shunt the liquid medium in the tertiary liquid inlet pipe to a plurality of battery module units; the fifth liquid inlet pipe is used to shunt the liquid medium in the fourth liquid inlet pipe to a plurality of battery modules; the sixth liquid inlet pipe is used to be connected to the battery module The heat exchange inlet is connected; the liquid return pipeline unit includes a primary liquid return pipe, a secondary liquid return pipe, a tertiary liquid return pipe, a quaternary liquid return pipe, a fifth liquid return pipe and a sixth liquid return pipe; the sixth liquid return pipe is used to be connected to the heat exchange outlet of the battery module, the fifth liquid return pipe is used to collect the liquid medium in multiple sixth liquid return pipes into the fourth liquid return pipe; the fourth liquid return pipe is used to collect the liquid medium in multiple fifth liquid return pipes into the third liquid return pipe; the third liquid return pipe is used to collect the liquid medium in multiple fourth liquid return pipes into the secondary liquid return pipe; the secondary liquid return pipe is used to collect the liquid medium in multiple tertiary liquid return pipes into the primary liquid return pipe, and the outlet of the primary liquid return pipe is used to be connected to the temperature control device.

[0009] Furthermore, the lengths of the plurality of secondary liquid return pipes are the same, the lengths of the plurality of tertiary liquid return pipes are the same, and the lengths of the plurality of quaternary liquid return pipes are the same.

[0010] Furthermore, the flow areas of the first-level liquid inlet pipe, the second-level liquid inlet pipe, the third-level liquid inlet pipe, the fourth-level liquid inlet pipe, the fifth-level liquid inlet pipe and the sixth-level liquid inlet pipe gradually decrease, and the flow areas of the first-level liquid return pipe, the second-level liquid return pipe, the third-level liquid return pipe, the fourth-level liquid return pipe, the fifth-level liquid return pipe and the sixth-level liquid return pipe gradually decrease.

[0011] Furthermore, the five-stage liquid inlet pipe is mainly formed by alternately splicing a plurality of liquid inlet branch pipes and a plurality of first connecting pipes, and a port of each first connecting pipe is used to connect to the inlet of a six-stage liquid inlet pipe; the five-stage liquid return pipe is mainly formed by alternately splicing a plurality of liquid return branch pipes and a plurality of second connecting pipes, and a port of the second connecting pipe is used to connect to the outlet of a six-stage liquid return pipe; the first connecting pipe and the second connecting pipe are both three-way joints.

[0012] Furthermore, the fourth-stage liquid inlet pipe is mainly formed by alternately splicing a plurality of liquid inlet branches and a plurality of third connecting pipes, and a port of the third connecting pipe is used to connect with the liquid inlet of a fifth-stage liquid inlet pipe; the fourth-stage liquid return pipe is mainly formed by alternately splicing a plurality of liquid return branches and a plurality of fourth connecting pipes, and a port of the fourth connecting pipe is used to connect with the liquid outlet of a fifth-stage liquid return pipe; the third connecting pipe and the fourth connecting pipe are both three-way joints.

[0013] Furthermore, the first-level liquid inlet pipe, second-level liquid inlet pipe, third-level liquid inlet pipe, first-level liquid return pipe, second-level liquid return pipe, and third-level liquid return pipe are all located at the top of each battery cluster, and the fourth-level liquid inlet pipe and fourth-level liquid return pipe are respectively arranged on both sides of each battery cluster.

[0014] Furthermore, the six-stage liquid inlet pipe and the six-stage liquid return pipe are flexible pipes.

[0015] Furthermore, the liquid inlet of the five-stage liquid inlet pipe and the liquid outlet of the five-stage liquid return pipe are both provided with quick-connect connectors, and the tops of the four-stage liquid inlet pipe and the four-stage liquid return pipe are provided with exhaust valves.

[0016] The utility model also provides an energy storage device, including an energy storage box, multiple battery modules and a temperature control system, wherein the temperature control system includes a temperature control device and a temperature control pipeline assembly; multiple battery modules are arranged in sequence in the horizontal direction to form a battery module unit, multiple battery module units are arranged in sequence in the vertical direction to form a battery cluster, and multiple battery clusters are linearly arranged in the energy storage box; the temperature control device is arranged on the same side of each battery cluster in the energy storage box; the heat exchange inlet of the battery module is connected to the outlet of the six-stage liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the six-stage liquid return pipe.

[0017] Furthermore, it also includes a battery rack, which includes a plurality of mounting brackets arranged in sequence along the vertical direction and a vertical support beam that fixedly connects the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket, and the five-stage liquid inlet pipe and the five-stage liquid return pipe are both embedded and installed in the mounting bracket.

[0018] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0019] 1. In the temperature control pipeline assembly of the utility model, the liquid inlet pipeline unit and the liquid return pipeline unit are connected and combined through a multi-stage pipeline, so that the liquid medium flowing out of the temperature control device is divided step by step and evenly distributed to each battery module, and the liquid medium flow rate allocated to each battery module is balanced, so that each battery cluster and each battery module in the battery cluster has a good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment.

[0020] 2. In the temperature control pipeline assembly of the utility model, the lengths of multiple secondary liquid return pipes are the same, the lengths of multiple tertiary liquid return pipes are the same, and the lengths of multiple quaternary liquid return pipes are the same. This arrangement makes the flow deviation of the liquid medium for heat exchange with each battery module smaller, and achieves uniform liquid delivery as much as possible. The heat exchange amount between each battery module is as consistent as possible, and the temperature difference between each battery module is as small as possible, so as to achieve more uniform heat exchange for each battery module, reduce the temperature difference between each battery cluster and each battery module, and improve the safety of the energy storage equipment.

[0021] 3. In the temperature control pipeline assembly of the utility model, the flow areas of the first-level liquid inlet pipe, the second-level liquid inlet pipe, the third-level liquid inlet pipe, the fourth-level liquid inlet pipe, the fifth-level liquid inlet pipe and the sixth-level liquid inlet pipe are gradually reduced, and the flow areas of the first-level liquid return pipe, the second-level liquid return pipe, the third-level liquid return pipe, the fourth-level liquid return pipe, the fifth-level liquid return pipe and the sixth-level liquid return pipe are gradually reduced. This arrangement makes the flow deviation of the liquid medium for heat exchange with each battery module smaller, reduces the temperature difference of the battery module, and increases the service life of the battery module.

[0022] 4. In the temperature control pipeline assembly of the utility model, the four-stage liquid inlet pipe, the four-stage liquid return pipe, the five-stage liquid inlet pipe, and the five-stage liquid return pipe are all formed by spliced ​​pipelines, which reduces the error and assembly difficulty when connecting each pipeline in the temperature control pipeline assembly. At the same time, in the subsequent maintenance of this spliced ​​pipeline, it is only necessary to remove the pipeline connector of the relevant battery module for maintenance, without removing the entire temperature control pipeline assembly, which is very convenient for installation and maintenance.

[0023] 5. In the temperature control pipeline assembly of the utility model, the first-level liquid inlet pipe, the second-level liquid inlet pipe, the third-level liquid inlet pipe, the first-level liquid return pipe, the second-level liquid return pipe, and the third-level liquid return pipe are all located on the top of the battery cluster, and the fourth-level liquid inlet pipe and the fourth-level liquid return pipe are respectively arranged on both sides of each battery cluster. This arrangement can improve the connectivity of the entire temperature control pipeline assembly and the compactness of the pipeline layout, avoid stacking and crossing of pipelines, and increase the inconvenience of connection.

[0024] 6. In the temperature control pipeline assembly of the utility model, the six-stage liquid inlet pipe and the six-stage liquid return pipe are flexible pipelines. The flexible pipelines reduce the installation error when the pipelines are connected, reduce the on-site installation requirements, and further increase the installation convenience of the temperature control pipeline assembly.

[0025] 7. In the temperature control pipeline assembly of the utility model, quick-connect connectors are provided on the liquid inlet of the five-stage liquid inlet pipe and the liquid outlet of the five-stage liquid return pipe. The quick-connect connectors are easy to install and can be directly plugged in and out without tools, which can improve the convenience of installation or disassembly.

[0026] 8. In the energy storage device of the present invention, the temperature control device is arranged on the same side of each battery cluster, so that the space layout in the energy storage box is reasonable, reducing the risk of leakage of the temperature control device. At the same time, the corresponding temperature control pipeline component layout is arranged, so that the cooling effect of each battery cluster and each battery module is equivalent, thereby improving the service life of the entire energy storage device.

[0027] 9. In the energy storage device of the utility model, the five-stage liquid inlet pipe and the five-stage liquid return pipe are embedded in the mounting bracket of the battery rack, so that the temperature control pipeline assembly occupies less space and the integration degree of the entire energy storage device is better.

[0028] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a schematic diagram of the temperature control pipeline assembly in Example 1;

[0031] Figure 2 It is a partial schematic diagram of the temperature control pipeline assembly in Example 1;

[0032] Figure 3 It is a front view of the energy storage device in Example 2;

[0033] Figure 4 is a top view of the energy storage device in Example 2;

[0034] Figure 5 This is a schematic diagram of the connection between the temperature control pipeline assembly and the battery rack in Example 2.

[0035] Figure numerals: 1-liquid inlet pipeline unit, 2-liquid return pipeline unit, 3-battery compartment, 4-battery cluster, 5-battery module unit, 6-battery rack, 7-temperature control device, 8-energy storage box, 11-first-level liquid inlet pipe, 12-second-level liquid inlet pipe, 13-third-level liquid inlet pipe, 14-fourth-level liquid inlet pipe, 15-fifth-level liquid inlet pipe, 16-sixth-level liquid inlet pipe, 17-quick plug connector, 18-insulation sleeve, 141-liquid inlet branch pipe, 142-third-level liquid inlet pipe Take over, 151-liquid inlet branch pipe, 152-first connecting pipe, 21-first level liquid return pipe, 22-second level liquid return pipe, 23-third level liquid return pipe, 24-fourth level liquid return pipe, 25-fifth level liquid return pipe, 26-sixth level liquid return pipe, 241-liquid return branch pipe, 242-fourth connecting pipe, 251-liquid return branch pipe, 252-second connecting pipe, 41-battery module, 411-heat exchange inlet, 412-heat exchange outlet, 61-mounting bracket. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary persons in the field without creative work should fall within the scope of protection of the utility model.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] The "other embodiments" that appear in different places in this specification do not all refer to the same embodiment, nor are they separate or selective embodiments that are mutually exclusive with other embodiments. In the description of this specification, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited.

[0039] In the description of this specification, unless otherwise clearly specified and limited, the term "connection" 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 direct connection, an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] At the same time, in the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "top, bottom, inside and outside" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Example 1

[0042] like Figures 3 to 5As shown, this embodiment provides a temperature control pipeline assembly for use in energy storage devices. In order to meet the different capacity requirements of energy storage devices, existing energy storage devices arrange multiple battery modules 41 in series and parallel. The battery module 41 is formed by connecting multiple single cells in parallel or in series. A protective shell for protecting each single cell is provided on the outside of the battery module 41. In some cases, the protective shell can also be omitted. In order to improve the energy density, multiple battery modules 41 are arranged in sequence in the horizontal direction to form a battery module unit 5. Subsequently, multiple battery module units 5 are arranged in sequence in the vertical direction to form a battery cluster 4. Multiple battery clusters 4 are linearly arranged in a battery compartment 3. Each energy storage device includes at least two battery compartments 3.

[0043] like Figure 5 As shown, during the charging and discharging operation of the battery module 41, the battery module 41 itself will generate a large amount of heat. If the battery module 41 is not cooled in time, the performance of the battery module 41 will decline. At present, liquid cooling is mainly used to cool the battery module 41. When the battery module 41 is cooled by liquid cooling, a heat exchange device is set on each battery module 41. The heat exchange device can be a liquid cooling plate or liquid cooling tube in contact with each single battery shell, or in contact with each single battery pole, or in contact with the protective shell. The above-mentioned liquid cooling tube or liquid cooling plate has an inlet and an outlet, which serve as the heat exchange inlet 411 and the heat exchange outlet 412 of the battery module 41, and serve as an interface for connecting with the temperature control pipeline assembly in the temperature control system.

[0044] The present embodiment mainly provides a temperature control pipeline assembly, which includes a liquid inlet pipeline unit 1 and a liquid return pipeline unit 2. The liquid medium cools down the battery module 41 through a circulation loop formed by the liquid inlet pipeline unit 1 and the liquid return pipeline unit 2. The liquid inlet pipeline unit 1 and the liquid return pipeline unit 2 are connected by a multi-stage pipeline combination, so that the liquid medium flowing out of the temperature control device 7 is evenly distributed to each battery module 41 step by step, so that each battery module unit 5 has a good and balanced heat dissipation effect.

[0045] The specific components of the above-mentioned liquid inlet pipeline unit 1 and liquid return pipeline unit 2 are as follows:

[0046] like Figure 1 , Figure 3 and Figure 4As shown, the liquid inlet pipeline unit 1 includes a primary liquid inlet pipe 11, a secondary liquid inlet pipe 12, a tertiary liquid inlet pipe 13, a fourth liquid inlet pipe 14, a fifth liquid inlet pipe 15 and a sixth liquid inlet pipe 16; the inlet of the primary liquid inlet pipe 11 is used to be connected to the temperature control device 7; multiple secondary liquid inlet pipes 12 are connected to the primary liquid inlet pipe 11, and each secondary liquid inlet pipe 12 provides a liquid cooling medium to each battery compartment 3, that is, multiple secondary liquid inlet pipes 12 divert the liquid medium in the primary liquid inlet pipe 11 to multiple battery compartments 3; multiple tertiary liquid inlet pipes 13 are connected to the secondary liquid inlet pipe 12, and each tertiary liquid inlet pipe 13 provides a liquid cooling medium to each battery cluster 4, that is, multiple tertiary liquid inlet pipes 13 divert the liquid medium in the secondary liquid inlet pipe 12 To multiple battery clusters 4; multiple four-stage liquid inlet pipes 14 are all connected to the three-stage liquid inlet pipe 13, and each four-stage liquid inlet pipe 14 provides liquid cooling medium to each battery module unit 5, that is, the multiple four-stage liquid inlet pipes 14 divert the liquid medium in the three-stage liquid inlet pipe 13 to multiple battery module units 5; multiple five-stage liquid inlet pipes 15 are all connected to the four-stage liquid inlet pipe 14, and each five-stage liquid inlet pipe 15 provides liquid cooling medium to each battery module 41, that is, the multiple five-stage liquid inlet pipes 15 divert the liquid medium in the four-stage liquid inlet pipe 14 to multiple battery modules 41; the inlets of multiple six-stage liquid inlet pipes 16 are respectively connected to the five-stage liquid inlet pipe 15, and the outlet of the six-stage liquid inlet pipe 16 is used to be connected to the heat exchange inlet 411 of the battery module 41.

[0047] The above-mentioned liquid return pipeline unit 2 includes a primary liquid return pipe 21, a secondary liquid return pipe 22, a tertiary liquid return pipe 23, a fourth liquid return pipe 24, a fifth liquid return pipe 25 and a sixth liquid return pipe 26; the inlet of the sixth liquid return pipe 26 is used to be connected to the heat exchange outlet 412 of the battery module 41, and the fifth liquid return pipe 25 is used to collect the liquid medium in multiple sixth liquid return pipes 26 into the fourth liquid return pipe 24; the fourth liquid return pipe 24 is used to collect the liquid medium in multiple fifth liquid return pipes 25 into the tertiary liquid return pipe 23; the tertiary liquid return pipe 23 is used to collect the liquid medium in multiple fourth liquid return pipes 24 into the secondary liquid return pipe 22; the secondary liquid return pipe 22 is used to collect the liquid medium in multiple tertiary liquid return pipes 23 into the primary liquid return pipe 21, and the outlet of the primary liquid return pipe 21 is used to be connected to the temperature control device 7.

[0048] The above-mentioned liquid inlet pipeline unit 1 and liquid return pipeline unit 2 are connected by a combination of multiple pipelines to divide the liquid medium in the temperature control device 7 step by step for multiple times, so that the liquid medium can flow into the multiple battery modules 41 as evenly as possible through the liquid inlet pipeline unit 1, and then the liquid medium after step-by-step division cools and dissipates the multiple battery modules 41 at the same time, and the liquid medium takes away the heat of the battery module 41 and flows into the temperature control device 7 through the liquid return pipeline unit 2, and the cycle is repeated to achieve temperature control of the battery module 41. The above-mentioned liquid inlet pipeline unit 1 and liquid return pipeline unit 2 can continuously and stably cool the battery modules 41 in multiple battery clusters 4 through the step-by-step division design.

[0049] In this embodiment, the lengths of the above-mentioned multiple secondary liquid return pipes 22 are the same, the lengths of the multiple tertiary liquid return pipes 23 are the same, and the lengths of the multiple quaternary liquid return pipes 24 are the same. Through the above arrangement, the travel of the liquid medium after the step-by-step diversion through each battery module 41 is basically the same or similar, and then the liquid medium flowing through each battery module 41 has approximately the same flow rate and flow rate, so that the cooling effect of each battery module 41 is basically the same, ensuring that each battery module 41 can be cooled and dissipated stably and evenly at the same time, and then the safety of the energy storage device during use.

[0050] In this embodiment, the diameter of the above-mentioned pipelines can also be set. Specifically, the flow areas of the first-level liquid inlet pipe 11, the second-level liquid inlet pipe 12, the third-level liquid inlet pipe 13, the fourth-level liquid inlet pipe 14, the fifth-level liquid inlet pipe 15 and the sixth-level liquid inlet pipe 16 are gradually reduced, and the flow areas of the first-level liquid return pipe 21, the second-level liquid return pipe 22, the third-level liquid return pipe 23, the fourth-level liquid return pipe 24, the fifth-level liquid return pipe 25 and the sixth-level liquid return pipe 26 are gradually reduced; this setting makes the flow deviation of the liquid medium for heat exchange with each battery module 41 smaller, and realizes uniform liquid delivery as much as possible. The heat exchange amount between each battery module 41 is as consistent as possible, so that the temperature difference between each battery module 41 is as small as possible, and a more uniform heat exchange of the battery module 41 is achieved, the temperature difference of the battery module 41 is reduced, and the service life of the battery module 41 is increased.

[0051] like Figure 2 As shown, the four-stage liquid inlet pipe 14, the four-stage liquid return pipe 24, the five-stage liquid inlet pipe 15 and the five-stage liquid return pipe 25 in the temperature control pipeline assembly of this embodiment are all formed by splicing multiple sections of pipelines, so that the temperature control pipeline assembly is not only convenient for on-site installation and disassembly, and achieves the purpose of rapid installation and disassembly, but also convenient for subsequent on-site adjustment and maintenance of the temperature control pipeline assembly. During subsequent maintenance, it is only necessary to remove the pipeline connector of the relevant battery module 41, and there is no need to remove the entire temperature control pipeline assembly. Disassembly and maintenance are convenient, which reduces maintenance costs and improves maintenance efficiency. Among them, the specific composition of the four-stage liquid inlet pipe 14, the four-stage liquid return pipe 24, the five-stage liquid inlet pipe 15 and the five-stage liquid return pipe 25 is as follows:

[0052] like Figure 2 As shown, the four-stage liquid inlet pipe 14 is mainly formed by alternately splicing a plurality of liquid inlet branches 141 and a plurality of third connecting pipes 142, and one port of the third connecting pipe 142 is used to connect to the liquid inlet of a five-stage liquid inlet pipe 15; the four-stage liquid return pipe 24 is mainly formed by alternately splicing a plurality of liquid return branches 241 and a plurality of fourth connecting pipes 242, and one port of the fourth connecting pipe 242 is used to connect to the liquid outlet of a five-stage liquid return pipe 25; the five-stage liquid inlet pipe 15 is mainly formed by alternately splicing a plurality of liquid inlet branches 151 and a plurality of first connecting pipes The tubes 152 are formed by alternately splicing, and one port of the first connecting tube 152 is used to connect with the inlet of the six-stage liquid inlet pipe 16; the five-stage liquid return pipe 25 is mainly formed by alternately splicing a plurality of liquid return branch pipes 251 and a plurality of second connecting tubes 252, and one port of the second connecting tube 252 is used to connect with the outlet of the six-stage liquid return pipe 26; the outlet of the six-stage liquid inlet pipe 16 is used to connect with the heat exchange inlet 411 of the battery module 41, and the inlet of the six-stage liquid return pipe 26 is used to connect with the heat exchange outlet 412 of the battery module 41. The third connecting tube 142, the fourth connecting tube 242, the first connecting tube 152 and the second connecting tube 252 can all adopt three-way joints.

[0053] When the above pipelines are specifically installed, the single-channel five-level liquid inlet pipe 15 and the five-level liquid return pipe 25 are installed horizontally, and are connected to the battery module 41 in the battery module unit 5 through multiple six-level liquid inlet pipes 16 and six-level liquid return pipes 26. Multiple five-level liquid inlet pipes 15 and five-level liquid return pipes 25 are arranged in parallel, and the multiple five-level liquid inlet pipes 15 and five-level liquid return pipes 25 are vertically connected to the three-level liquid inlet pipe 13 and the two-level liquid return pipe 22. At this time, the four-level liquid inlet pipe 14 and the four-level liquid return pipe 24 are installed vertically, and the four-level liquid inlet pipe 14 and the four-level liquid return pipe 24 are respectively arranged on both sides of each battery cluster 4. The four-level liquid inlet pipe 14 and the four-level liquid return pipe 24 are arranged on both sides of the battery cluster 4 to reduce the impact of condensed water, pipeline leakage, etc. on the electrical components in the energy storage device and improve electrical safety.

[0054] At the same time, the first-level liquid inlet pipe 11, the second-level liquid inlet pipe 12, the third-level liquid inlet pipe 13, the first-level liquid return pipe 21, the second-level liquid return pipe 22, and the third-level liquid return pipe 23 can all be located at the top of the battery cluster 4. This arrangement occupies a small installation space, so that the temperature control pipeline assembly has a high degree of integration and is convenient for on-site adjustment and maintenance of the pipeline. At the same time, this arrangement can also improve the connectivity of the entire temperature control pipeline assembly and the compactness of the pipeline layout, avoid stacking and crossing of pipelines to make the connection inconvenient, and improve the convenience of installation and layout.

[0055] like Figure 2As shown, in this embodiment, the six-stage liquid inlet pipe 16 and the six-stage liquid return pipe 26 are both flexible pipes, which are specifically made of metal bellows. The flexible pipe reduces the installation error between the six-stage liquid inlet pipe 16, the six-stage liquid return pipe 26 and the battery module 41, reduces the on-site installation requirements, and further increases the installation convenience of the temperature control pipeline assembly. At the same time, the end of the flexible pipeline has a quick-plug connector, which can facilitate the sealing connection between the six-stage liquid inlet pipe 16, the six-stage liquid return pipe 26 and the heat exchange inlet 411 and the heat exchange outlet 412 of the battery module 41. In addition, the above-mentioned liquid inlet branch pipe 151, the liquid return branch pipe 251, the liquid inlet branch pipe 141, and the liquid return branch pipe 241 can also be made of flexible hoses, and can also be made of metal bellows, which also reduces the on-site installation requirements and further increases the installation convenience of the temperature control pipeline assembly. In practical applications, the flexible connection can make the position of each pipeline adjusted accordingly according to actual needs, thereby improving the installability of each pipeline.

[0056] The liquid inlet of the five-stage liquid inlet pipe 15 and the liquid outlet of the five-stage liquid return pipe 25 can be located on the same side of the battery module 41, or on different sides of the battery module 41. Specifically, according to the arrangement of the four-stage liquid inlet pipe 14 and the four-stage liquid return pipe 24 in the energy storage device, after the positions of the four-stage liquid inlet pipe 14 and the four-stage liquid return pipe 24 are determined, the ports not connected to the four-stage liquid inlet pipe 14 and the four-stage liquid return pipe 24 can be sealed with plugs.

[0057] In addition, when the liquid inlet of the five-stage liquid inlet pipe 15 and the liquid outlet of the five-stage liquid return pipe 25 are connected to the four-stage liquid inlet pipe 14 and the four-stage liquid return pipe 24, the connection can be achieved through the quick-plug connector 17. The quick-plug connector 17 is easy to install and can be directly plugged and unplugged without tools, which can improve the convenience of installation or disassembly. In addition, the quick-plug connector 17 can also have a two-way self-sealing function. During the process of plugging and unplugging the quick-plug connector 17, the flow of liquid can be automatically cut off, so that when the battery module 41 and the temperature control pipeline assembly are repaired, there is no need to empty the liquid medium in each pipeline, which improves the convenience of maintenance and the detachability of the pipeline, which is convenient for subsequent maintenance and replacement of the main pipeline.

[0058] like Figure 5 As shown, the liquid inlet branch pipe 141, the liquid return branch pipe 241, the liquid inlet branch pipe 151 and the liquid return branch pipe 251 in this embodiment are covered with an insulation sleeve 18. The insulation sleeve 18 can reduce the heat loss of the high-temperature cooling medium, and can also reduce the influence of the external environment on the heat-conducting medium in the pipeline. In addition, an exhaust valve can be provided on the top of the above-mentioned four-stage liquid inlet pipe and the four-stage liquid return pipe, and the exhaust valve improves the temperature control effect of the temperature control pipeline assembly.

[0059] Example 2

[0060] like Figures 3 to 5As shown, this embodiment provides an energy storage device, which includes a battery rack 6, a plurality of battery modules 41 and a temperature control system, wherein the temperature control system includes a temperature control device 7 and the temperature control pipeline assembly in Embodiment 1; a plurality of battery modules 41 are arranged in sequence in the horizontal direction to form a battery module unit 5, a plurality of battery module units 5 are arranged in sequence in the vertical direction to form a battery cluster 4, a plurality of battery clusters 4 are linearly arranged in a battery compartment 3, and each energy storage box 8 includes at least two battery compartments 3. The temperature control device 7 is arranged on the same side of each battery cluster 4 in the energy storage box 8. The temperature control device 7 is arranged on one side of each battery cluster 4, so that the space layout in the energy storage box 8 is reasonable, and the risk caused by the leakage of the temperature control device 7 is reduced. At the same time, a corresponding temperature control pipeline layout is arranged, so that the cooling effect of each battery cluster 4 is equivalent, and the service life of the entire energy storage device is improved.

[0061] The temperature control pipeline assembly and the temperature control device 7 form a temperature control system to control the temperature of the battery module 41. The temperature control device 7 processes the heat generated by the battery module 41, and mainly includes a temperature controller and a circulation pump; wherein the temperature controller is a device with heating and / or cooling functions, which is used to control the liquid medium (specifically water, ethylene glycol / water, propylene glycol / water, methanol /

[0062] Water, ethanol / water, calcium formate / water, etc.) is used to increase or decrease the temperature. For example, the temperature controller is specifically a heating and cooling machine or a refrigerator with a compressor, etc. The circulating pump is mainly used to circulate the liquid medium in the temperature control pipeline assembly. In this embodiment, the temperature controller and the circulating pump are an integrated device.

[0063] The battery rack 6 in this embodiment is used to support the battery module 41 in the energy storage device, so that the battery module 41 is closely arranged in the box of the energy storage device. The battery rack 6 includes a plurality of mounting brackets 61 arranged in the vertical direction, and a vertical support beam that fixes the plurality of mounting brackets 61; the mounting bracket 61 is used to insulate and support the battery module unit 5. In the above-mentioned battery rack 6, the mounting bracket 61 can be specifically a frame structure, which is formed by welding I-shaped steel and square steel pipes, and the vertical support beam is formed by angle steel, and the plurality of mounting brackets 61 and the vertical support beam are slidably installed.

[0064] like Figure 5As shown, during specific installation, the battery module unit 5 is installed on the mounting bracket 61. The heat exchange inlet 411 of the battery module 41 is connected to the outlet of the six-stage liquid inlet pipe 16, and the heat exchange outlet 412 is connected to the inlet of the six-stage liquid return pipe 26. The five-stage liquid inlet pipe 15 and the five-stage liquid return pipe 25 are both embedded and installed in the mounting bracket 61 of the battery rack 6. The four-stage liquid inlet pipe 14 and the four-stage liquid return pipe 24 are both embedded and installed in the vertical support beam of the battery rack 6. The pipelines in the above-mentioned temperature control pipeline assembly are embedded and installed in the battery rack 6, so that the temperature control pipeline assembly occupies less space and the integration degree of the entire energy storage device is better. During specific installation, the five-stage liquid inlet pipe 15 and the five-stage liquid return pipe 25 can be installed in parallel, and a protective plate is also provided on the mounting bracket 61, which protects the five-stage liquid inlet pipe 15 and the five-stage liquid return pipe 25 on the mounting bracket 61.

[0065] After the above-mentioned temperature control pipeline assembly is assembled, it is connected to the temperature control device 7. The temperature control machine of the temperature control device 7 has a liquid return port and a liquid discharge port. The first-level liquid inlet pipe 11 is connected to the liquid discharge port, the first-level liquid return pipe 21 is connected to the liquid return port, the fifth-level liquid inlet pipe 15 is connected to the heat exchange inlet 411 of the multiple battery modules 41 through the sixth-level liquid inlet pipe 16, and the fifth-level liquid return pipe 25 is connected to the heat exchange outlet 412 of the multiple battery modules 41 through the sixth-level liquid return pipe 26. In this way, the liquid medium discharged from the discharge port of the temperature controller is transported to the heat exchange device of the battery module 41 via the first-level liquid inlet pipe 11, the second-level liquid inlet pipe 12, the third-level liquid inlet pipe 13, the fourth-level liquid inlet pipe 14, the fifth-level liquid inlet pipe 15 and the sixth-level liquid inlet pipe 16. The liquid medium takes away the heat from the battery module 41 and then returns to the temperature control device 7 via the sixth-level liquid return pipe 26, the fifth-level liquid return pipe 25, the fourth-level liquid return pipe 24, the third-level liquid return pipe 23, the second-level liquid return pipe 22 and the first-level liquid return pipe 21. This cycle is repeated to reduce the temperature of the battery module 41 so that the battery module 41 operates within a suitable temperature range.

Claims

1. A temperature control pipeline assembly, characterized in that: It includes a liquid inlet pipeline unit and a liquid return pipeline unit; The liquid inlet pipeline unit includes a primary liquid inlet pipe, a secondary liquid inlet pipe, a tertiary liquid inlet pipe, a quaternary liquid inlet pipe, a fifth liquid inlet pipe and a sixth liquid inlet pipe; the inlet of the primary liquid inlet pipe is used to be connected to the temperature control device; The secondary liquid inlet pipe is used to divert the liquid medium in the primary liquid inlet pipe to multiple battery compartments; The tertiary liquid inlet pipe is used to divert the liquid medium in the secondary liquid inlet pipe to multiple battery clusters; The fourth-stage liquid inlet pipe is used to shunt the liquid medium in the third-stage liquid inlet pipe to multiple battery module units; the fifth-stage liquid inlet pipe is used to shunt the liquid medium in the fourth-stage liquid inlet pipe to multiple battery modules; the sixth-stage liquid inlet pipe is used to connect to the heat exchange inlet of the battery module; The liquid return pipe unit includes a primary liquid return pipe, a secondary liquid return pipe, a tertiary liquid return pipe, a quaternary liquid return pipe, a quintuple liquid return pipe and a VI liquid return pipe; the VI liquid return pipe is used to be connected to the heat exchange outlet of the battery module; the quintuple liquid return pipe is used to collect the liquid medium in multiple VI liquid return pipes into the quaternary liquid return pipe; the quaternary liquid return pipe is used to collect the liquid medium in multiple quintuple liquid return pipes into the tertiary liquid return pipe; the tertiary liquid return pipe is used to collect the liquid medium in multiple quaternary liquid return pipes into the secondary liquid return pipe; The secondary liquid return pipe is used to collect the liquid medium in the plurality of tertiary liquid return pipes into the primary liquid return pipe, and the outlet of the primary liquid return pipe is used to be connected to the temperature control device.

2. The temperature control pipeline assembly according to claim 1, characterized in that: The lengths of the plurality of secondary liquid return pipes are the same, the lengths of the plurality of tertiary liquid return pipes are the same, and the lengths of the plurality of quaternary liquid return pipes are the same.

3. The temperature control pipeline assembly according to claim 1, characterized in that: The flow areas of the first-level liquid inlet pipe, the second-level liquid inlet pipe, the third-level liquid inlet pipe, the fourth-level liquid inlet pipe, the fifth-level liquid inlet pipe and the sixth-level liquid inlet pipe gradually decrease, and the flow areas of the first-level liquid return pipe, the second-level liquid return pipe, the third-level liquid return pipe, the fourth-level liquid return pipe, the fifth-level liquid return pipe and the sixth-level liquid return pipe gradually decrease.

4. The temperature control pipeline assembly according to claim 1, characterized in that: The five-stage liquid inlet pipe is mainly formed by alternately splicing a plurality of liquid inlet branch pipes and a plurality of first connecting pipes, and a port of each first connecting pipe is used to connect with the inlet of a six-stage liquid inlet pipe; the five-stage liquid return pipe is mainly formed by alternately splicing a plurality of liquid return branch pipes and a plurality of second connecting pipes, and a port of the second connecting pipe is used to connect with the outlet of a six-stage liquid return pipe; the first connecting pipe and the second connecting pipe are both three-way joints.

5. The temperature control pipeline assembly according to claim 4, characterized in that: The four-stage liquid inlet pipe is mainly formed by alternately splicing a plurality of liquid inlet branches and a plurality of third connecting pipes, and a port of the third connecting pipe is used to connect with the liquid inlet of a five-stage liquid inlet pipe; the four-stage liquid return pipe is mainly formed by alternately splicing a plurality of liquid return branches and a plurality of fourth connecting pipes, and a port of the fourth connecting pipe is used to connect with the liquid outlet of a five-stage liquid return pipe; the third connecting pipe and the fourth connecting pipe are both three-way joints.

6. The temperature control pipeline assembly according to any one of claims 1 to 5, characterized in that: The first-level liquid inlet pipe, second-level liquid inlet pipe, third-level liquid inlet pipe, first-level liquid return pipe, second-level liquid return pipe and third-level liquid return pipe are all located at the top of each battery cluster, and the fourth-level liquid inlet pipe and fourth-level liquid return pipe are respectively arranged on both sides of each battery cluster.

7. The temperature control pipeline assembly according to claim 6, characterized in that: The six-stage liquid inlet pipe and the six-stage liquid return pipe are flexible pipes.

8. The temperature control pipeline assembly according to claim 7, characterized in that: The liquid inlet of the five-stage liquid inlet pipe and the liquid outlet of the five-stage liquid return pipe are both provided with quick-connect connectors, and the tops of the four-stage liquid inlet pipe and the four-stage liquid return pipe are provided with exhaust valves.

9. An energy storage device, characterized in that: It comprises an energy storage box, a plurality of battery modules and a temperature control system, wherein the temperature control system comprises a temperature control device and a temperature control pipeline assembly according to any one of claims 1 to 8; A plurality of battery modules are arranged in sequence in the horizontal direction to form a battery module unit, a plurality of battery module units are arranged in sequence in the vertical direction to form a battery cluster, and a plurality of battery clusters are arranged linearly in the energy storage box; the temperature control device is arranged on the same side of each battery cluster in the energy storage box; a heat exchange device is arranged on the battery module, and the heat exchange device has an inlet and an outlet, which serve as a heat exchange inlet and a heat exchange outlet of the battery module, the heat exchange inlet of the battery module is connected to the outlet of the six-stage liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the six-stage liquid return pipe.

10. The energy storage device according to claim 9, characterized in that: It also includes a battery rack, which includes a plurality of mounting brackets arranged in sequence along the vertical direction and a vertical support beam that fixedly connects the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket, and the five-stage liquid inlet pipe and the five-stage liquid return pipe are both embedded and installed in the mounting bracket.

11. The energy storage device according to claim 9, characterized in that: The heat exchange device is a liquid cooling plate or a liquid cooling pipe in contact with the pole of the battery module or the protective shell of the battery module.

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