Liquid cooling pipeline and battery compartment applied to high-pressure cascade energy storage system

Abstract

The utility model provides a liquid cooling pipeline and a battery compartment applied to a high-pressure cascade energy storage system. The liquid cooling pipeline comprises a main liquid inlet pipeline, a main liquid outlet pipeline, a first-stage pipeline, a second-stage pipeline and a third-stage pipeline, the first-stage pipeline, the second-stage pipeline and the third-stage pipeline are made of thermoplastic plastics; the first-stage pipeline is arranged at the top and the bottom of the battery cluster and is communicated with the main liquid inlet pipeline and the main liquid outlet pipeline respectively; the second-stage pipeline is detachably connected with the first-stage pipeline, and the second-stage pipeline is used for being vertically arranged on the periphery of the battery cluster; the third-stage pipeline is detachably connected with the second-stage pipeline, and the third-stage pipeline is used for being adjacently arranged on the front side face and / or the rear side face of the battery pack so as to communicate with the liquid cooling plates located on the same layer of battery packs. The liquid cooling pipeline has relatively high electrical insulation performance, can meet the electrical insulation requirement of the high-voltage cascade energy storage system, is relatively low in raw material cost, and can reduce the manufacturing cost of the high-voltage cascade energy storage system.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field especially, relates to a liquid cooling pipeline and battery cabin applied to high pressure cascade energy storage system. BACKGROUND

[0002] The high pressure cascade scheme refers to the cascade work of multiple high pressure energy storage systems in the power system. The high pressure cascade scheme can improve the voltage level of the energy storage system, realize efficient energy conversion and transmission, and significantly enhance the performance of the energy storage system. The high pressure cascade scheme can be directly connected to the 6-35kV grid voltage without the need for a transformer, significantly reducing system network loss, improving efficiency, and shortening the response time of the energy storage system. The high pressure energy storage system usually consists of at least one battery cabin. The battery cabin contains multiple battery clusters, and each battery cluster contains multiple battery packs. Each battery pack usually uses a liquid cooling plate for heat dissipation. The battery cabin is equipped with a liquid cooling pipeline for heat dissipation of the battery pack.

[0003] In the prior art, the liquid cooling pipeline in the battery cabin of the energy storage system mainly uses a heterogeneous pipeline, which usually includes a primary pipeline, a secondary pipeline, and a tertiary pipeline. The primary pipeline is made of stainless steel.

[0004] In the process of implementing the utility model, the inventors found that at least the following problems exist in the prior art: The primary pipeline is made of stainless steel, which can meet the structural strength requirements but cannot meet the electrical insulation requirements of the high pressure cascade energy storage system. UTILITY MODEL CONTENTS

[0005] The utility model aims to at least solve one of the technical problems in the related art to some extent.

[0006] Therefore, the purpose of the utility model is to provide a liquid cooling pipeline and battery cabin applied to a high pressure cascade energy storage system, which can meet the electrical insulation requirements of the high pressure cascade energy storage system.

[0007] To achieve the above purpose, the utility model provides a liquid cooling pipeline applied to a high pressure cascade energy storage system in the first aspect, which includes a total liquid inlet pipeline, a total liquid outlet pipeline, a primary pipeline, a secondary pipeline, and a tertiary pipeline. The material of the primary pipeline, the secondary pipeline, and the tertiary pipeline is thermoplastic plastic. The primary pipeline is arranged at the top and bottom of the battery cluster, and the primary pipeline is connected to the total liquid inlet pipeline and the total liquid outlet pipeline respectively. The secondary pipeline is detachably connected to the primary pipeline, and the secondary pipeline is vertically arranged around the battery cluster. The tertiary pipeline is detachably connected to the secondary pipeline, and the tertiary pipeline is arranged near the front side and / or rear side of the battery pack to connect the liquid cooling plates of the battery pack in the same layer.

[0008] The liquid cooling pipeline applied to the high-voltage cascade energy storage system has the advantages that the primary pipeline is made of thermoplastic plastic, has good corrosion resistance and aging resistance to chemical substances such as acid, alkali and solvent, has good mechanical strength and toughness, high heat resistance and high electrical insulation performance, can meet the electrical insulation requirements of the high-voltage cascade energy storage system, has low raw material cost, and can reduce the manufacturing cost of the high-voltage cascade energy storage system.

[0009] According to one embodiment of the utility model, the material of the primary pipeline is PPH, and the materials of the secondary pipeline and the tertiary pipeline are nylon.

[0010] According to one embodiment of the utility model, the total liquid inlet pipeline and the total liquid outlet pipeline are arranged on the same side of the battery cluster.

[0011] According to one embodiment of the utility model, the pipe inner diameter of the primary pipeline, the pipe inner diameter of the secondary pipeline and the pipe inner diameter of the tertiary pipeline sequentially decrease.

[0012] According to one embodiment of the utility model, the primary pipeline is in a U shape.

[0013] According to one embodiment of the utility model, a plurality of quick couplings are further included, and the primary pipeline and the secondary pipeline are connected through the quick couplings.

[0014] According to one embodiment of the utility model, a plurality of three-way couplings are further included, the secondary pipeline is divided into multiple sections along the vertical direction, and the secondary pipeline and the tertiary pipeline of adjacent two sections are connected through the three-way couplings.

[0015] According to one embodiment of the utility model, the tertiary pipeline includes a first conveying pipe and a second conveying pipe, the first conveying pipe is used for connecting the secondary pipeline and the battery pack liquid inlet and the secondary pipeline and the battery pack liquid outlet, and the second conveying pipe is used for connecting the battery pack liquid inlet and the battery pack liquid outlet of two adjacent battery packs located on the same layer.

[0016] According to one embodiment of the utility model, a one-way stop valve is arranged on the first conveying pipe and / or the second conveying pipe.

[0017] The second aspect of the utility model further provides a battery cabin, which includes a plurality of battery clusters, a cabin body and the liquid cooling pipeline as described in the first aspect, the battery clusters are arranged in the cabin body, and the liquid cooling pipeline is communicated with the battery clusters.

[0018] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are intended to denote the same components throughout the drawings. Among other things:

[0020] Figure 1 is a structural schematic view of a liquid cooling pipeline applied to a high-voltage cascaded energy storage system according to an embodiment of the present application.

[0021] Figure 2 is a partial structural schematic view of the inside of a battery cabin according to an embodiment of the present application.

[0022] Legend of reference signs:

[0023] 1 - total liquid inlet pipeline, 2 - total liquid outlet pipeline, 3 - first pipeline, 4 - second pipeline, 5 - third pipeline, 51 - first conveying pipe, 52 - second conveying pipe, 6 - battery pack, 7 - liquid cooling plate, 8 - battery pack liquid inlet, 9 - battery pack liquid outlet. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0025] In combination with Figure 1 and Figure 2 shown, the embodiment of the present application proposes a liquid cooling pipeline applied to a high-voltage cascaded energy storage system, which comprises a total liquid inlet pipeline 1, a total liquid outlet pipeline 2, a first pipeline 3, a second pipeline 4 and a third pipeline 5. The material of the first pipeline 3, the second pipeline 4 and the third pipeline 5 is thermoplastic plastic. The first pipeline 3 is arranged at the top and the bottom of the battery cluster, and the first pipeline 3 is connected in communication with the total liquid inlet pipeline 1 and the total liquid outlet pipeline 2, respectively. The second pipeline 4 is detachably connected with the first pipeline 3, and the second pipeline 4 is arranged vertically around the battery cluster. The third pipeline 5 is detachably connected with the second pipeline 4, and the third pipeline 5 is arranged adjacent to the front side and / or the rear side of the battery pack 6 to communicate the liquid cooling plates 7 of the battery packs at the same layer.

[0026] The battery cluster is composed of a plurality of battery packs 6 stacked in the vertical direction. The battery pack 6 is internally composed of a plurality of battery cell modules in series. The specific type of the battery cell module can be set according to actual needs, and no limitation is made thereto. Each battery cluster is usually arranged in an array. The number of clusters of the battery cluster is set according to actual needs, and no limitation is made thereto.

[0027] The end of the total liquid inlet pipeline 1 and the total liquid outlet pipeline 2 is used to connect with the external water chiller. The position of the total liquid inlet pipeline 1 and the total liquid outlet pipeline 2 is set according to actual needs, and no specific limitation is made thereto. For example, the total liquid inlet pipeline 1 and the total liquid outlet pipeline 2 can be arranged on the same side of the battery cluster, or on different sides of the battery cluster. The number and inner diameter of the first pipeline 3, the second pipeline 4 and the third pipeline 5 are set according to actual needs, and no specific limitation is made thereto. Thermoplastic plastic is a kind of plastic that has plasticity at a certain temperature, solidifies after cooling and can repeat this process, and has many advantages, such as excellent chemical properties, easy processing, good physical properties, etc.

[0028] The arrangement mode of the first pipeline 3 is set according to actual needs, and no limitation is made thereto. For example, the first pipeline 3 is in the shape of U as a whole. The first pipeline 3 can surround the projection of the battery cluster in the plane where the first pipeline 3 is located, achieving a higher cooling effect. The number of the second pipeline 4 is set according to actual needs, and no specific limitation is made thereto. The second pipeline 4 uniformly distributes the cooling liquid from the first pipeline 3 to each battery cluster, so that each battery cluster can obtain sufficient cooling liquid. The third pipeline 5 uniformly distributes the cooling liquid from the second pipeline 4 into the liquid cooling plate 7 of each battery pack 6, so that each liquid cooling plate 7 obtains sufficient cooling liquid, achieving heat dissipation of the battery cell module in the battery pack.

[0029] Under the pumping pressure of the external water chiller, the cooling liquid flows from the total liquid inlet pipeline 1 into the first pipeline 3, the cooling liquid in the first pipeline 3 at the bottom of the battery cluster flows upward along the second pipeline 4, and flows into the liquid cooling plate 7 of each battery pack 6 through the third pipeline 5, and then converges into the first pipeline 3 at the top of the battery cluster, and finally flows into the total liquid outlet pipeline 2, and after being cooled by the water chiller, enters the total liquid inlet pipeline 1 again, and so on.

[0030] The liquid cooling pipeline applied to the high-voltage cascade energy storage system according to the embodiment of the utility model has the advantages that the first pipeline adopts thermoplastic plastic, which has good corrosion resistance and aging resistance to chemical substances such as acid, alkali and solvent, and also has good mechanical strength and toughness, high heat resistance and high electrical insulation performance, can meet the electrical insulation requirements of the high-voltage cascade energy storage system, has low raw material cost, and can reduce the manufacturing cost of the high-voltage cascade energy storage system.

[0031] In some embodiments, the material of the first pipeline 3 is PPH (homopolymer polypropylene), and the materials of the second pipeline 4 and the third pipeline 5 are nylon. PPH has the advantages of long service life, high strength, and chemical resistance. PPH has a relatively high dielectric strength and can withstand a relatively high voltage without breakdown. Nylon has good flexibility, is easy to install and disassemble, and is suitable for complex pipeline layout and narrow spaces.

[0032] As shown in Figure 1 In one example, the total inlet pipeline 1 and the total outlet pipeline 2 are arranged on the same side of the battery cluster, which can reduce the length of the liquid cooling pipeline, save material costs, and reduce the flow resistance and the energy required for pumping due to the shorter length of the liquid cooling pipeline.

[0033] The inner diameters of the first pipeline 3, the second pipeline 4, and the third pipeline 5 gradually decrease. By gradually reducing the inner diameters, the flow of the cooling liquid in each pipeline can be more uniform, avoiding local overheating. As the inner diameter of the pipeline decreases, the flow rate gradually increases, which helps to improve the cooling effect. Higher flow rate can better remove heat, allowing each battery module to be fully cooled.

[0034] In some embodiments, the liquid cooling pipeline applied to the high-voltage cascade energy storage system further includes a plurality of quick connectors (not shown in the drawings), and the first pipeline 3 and the second pipeline 4 are connected through the quick connectors. The quick connectors have the advantages of easy installation, reliable connection, and easy disassembly.

[0035] The liquid cooling pipeline applied to the high-voltage cascade energy storage system further includes a plurality of three-way connectors (not shown in the drawings), the second pipeline 4 is divided into multiple segments along the vertical direction, and the adjacent two segments of the second pipeline 4 and the third pipeline 5 are connected through the three-way connectors. The material of the three-way connector is selected according to actual needs, which is not specifically limited. For example, the material of the three-way connector is copper, which has high mechanical strength.

[0036] In some embodiments, in combination with Figure 1 and Figure 2 The third pipeline 5 includes a first conveying pipe 51 and a second conveying pipe 52. The first conveying pipe 51 is used to connect the second pipeline 4, the battery pack inlet 8, and the second pipeline 4, the battery pack outlet 9. The second conveying pipe 52 is used to connect the battery pack inlet 8 and the battery pack outlet 9 of two adjacent battery packs located on the same layer. The lengths of the first conveying pipe 51 and the second conveying pipe 52 are set according to actual needs, which are not specifically limited.

[0037] The first delivery pipe 51 and / or the second delivery pipe 52 is provided with a one-way check valve (not shown in the figure) to prevent the cooling liquid from flowing reversely and flowing in a predetermined direction. The one-way check valve can also keep the flow of the cooling liquid relatively stable and avoid flow fluctuation caused by reverse flow. When some pipes of the three-stage pipe 5 need to be replaced, the one-way check valve can be quickly closed to prevent the cooling liquid from continuing to flow.

[0038] The utility model embodiment further provides a battery cabin, comprising a plurality of battery clusters, a cabin body and the liquid cooling pipe line of as above described embodiment, battery cluster is established in the cabin body, liquid cooling pipe line and battery cluster intercommunication.

[0039] Since the liquid cooling pipe line adopts thermoplastic plastic, the battery cabin of the utility model embodiment meets the electrical insulation requirement in the field of high-voltage energy storage system and can be applied to the high-voltage energy storage system.

[0040] It should be noted that, in the description of the utility model, the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0041] In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] In the utility model, unless otherwise specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of this utility model, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A liquid cooling pipeline applied to a high-voltage cascade energy storage system, characterized in that, The liquid cooling pipeline comprises a total inlet pipeline (1), a total outlet pipeline (2), a first-stage pipeline (3), a second-stage pipeline (4) and a third-stage pipeline (5); the first-stage pipeline (3), the second-stage pipeline (4) and the third-stage pipeline (5) are made of thermoplastic plastic; the first-stage pipeline (3) is arranged at the top and the bottom of a battery cluster, and is connected with the total inlet pipeline (1) and the total outlet pipeline (2) respectively; the second-stage pipeline (4) is detachably connected with the first-stage pipeline (3), and is arranged vertically around the battery cluster; the third-stage pipeline (5) is detachably connected with the second-stage pipeline (4), and is arranged near the front side and / or the rear side of the battery pack to communicate the liquid cooling plates in the same layer of battery pack.

2. The liquid cooling pipe applied to a high-pressure cascade energy storage system according to claim 1, characterized in that, The first-stage pipeline (3) is made of PPH, and the second-stage pipeline (4) and the third-stage pipeline (5) are made of nylon.

3. The liquid cooling pipe applied to the high-pressure cascade energy storage system according to claim 1, characterized in that, The total inlet pipeline (1) and the total outlet pipeline (2) are arranged on the same side of the battery cluster.

4. The liquid cooling pipe applied to the high-pressure cascade energy storage system according to claim 1, characterized in that, The inner diameter of the first-stage pipeline (3), the inner diameter of the second-stage pipeline (4) and the inner diameter of the third-stage pipeline (5) decrease in sequence.

5. The liquid cooling pipe applied to a high-pressure cascade energy storage system according to claim 1, characterized in that, The first-stage pipeline (3) is in the shape of U.

6. The liquid cooling pipe applied to a high-pressure cascade energy storage system according to claim 1, characterized in that, A plurality of quick connectors are further arranged, and the first-stage pipeline (3) and the second-stage pipeline (4) are connected through the quick connectors.

7. The liquid cooling pipe applied to a high-pressure cascade energy storage system according to claim 1, characterized in that, A plurality of three-way connectors are further arranged, the second-stage pipeline (4) is divided into multiple segments along the vertical direction, and the second-stage pipeline (4) and the third-stage pipeline (5) of adjacent two segments are connected through the three-way connectors.

8. The liquid cooling pipe applied to a high-pressure cascade energy storage system according to claim 1, characterized in that, The third-stage pipeline (5) comprises a first conveying pipe (51) and a second conveying pipe (52), the first conveying pipe (51) is used to communicate the second-stage pipeline (4) and the battery pack inlet (8) and the second-stage pipeline (4) and the battery pack outlet (9), and the second conveying pipe (52) is used to communicate the battery pack inlet (8) and the battery pack outlet (9) of two adjacent battery packs in the same layer.

9. The liquid cooling line for use in a high pressure cascade energy storage system according to claim 8, characterized in that, A one-way stop valve is arranged on the first conveying pipe (51) and / or the second conveying pipe (52).

10. A battery compartment characterized by, The liquid cooling pipeline comprises a plurality of battery clusters, a cabin body and the liquid cooling pipeline according to any one of claims 1 to 9, the battery clusters are arranged in the cabin body, and the liquid cooling pipeline communicates with the battery clusters.

Images