Liquid-cooled energy storage system

Abstract

The utility model relates to the technical field of energy storage batteries, in particular to a liquid-cooled energy storage system, which comprises a cabinet body which comprises at least two accommodating regions formed by separating the cabinet body in the length direction through at least one separating frame; each containing section comprises a first containing bin and a second containing bin which are formed by dividing the containing section in the height direction through a partition plate; the battery cluster assembly comprises battery clusters which are arranged in the first accommodating cabins of the accommodating intervals in a one-to-one manner; the liquid cooling machine assembly comprises liquid cooling machines which are arranged in the second containing bins of the containing intervals in a one-to-one mode, and each liquid cooling machine is connected with one battery cluster; and the high-voltage box assembly comprises high-voltage boxes arranged in the second containing bins of the containing intervals in a one-to-one mode, and each high-voltage box is matched with one battery cluster. According to the utility model, the loss during liquid cooling is small, and the utilization efficiency of overall energy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, and in particular to a liquid-cooled energy storage system. Background Art

[0002] Among energy storage systems, the mainstream is currently the lithium-ion battery energy storage system, and its safety performance during operation is also a very important part. Because lithium-ion batteries have poorer thermal stability than traditional lead-acid batteries, there is a risk of fire due to heat during operation, so the heat dissipation function of lithium-ion battery energy storage systems is very important.

[0003] At present, there are two main heat dissipation methods for lithium-ion battery energy storage systems: air cooling and liquid cooling. Among them, air cooling mainly uses air conditioning for refrigeration, and the cooling medium is air. It has low energy efficiency, large equipment footprint, and poor temperature consistency of the energy storage battery. Based on the problems of air cooling, some energy storage systems in the prior art use liquid cooling to replace air cooling. Liquid cooling uses a cooling plate with water as the cooling medium, and heat is exchanged between the cooling medium circulating in the cooling plate and the energy storage battery. For liquid cooling, actual research has found the following problems:

[0004] Liquid cooling units are mostly installed on the ground, which takes up a lot of space inside the energy storage box. In addition, the liquid cooling unit needs air in and out on all sides, which further squeezes the installation space for other equipment. On the other hand, the corresponding liquid cooling pipeline has a long transmission distance in this case, so the corresponding liquid cooling loss is large, and the overall energy utilization efficiency is relatively low.

[0005] In summary, in view of the problems existing in the liquid cooling method in the prior art, it is necessary to further optimize the heat dissipation structure of the energy storage system. Utility Model Content

[0006] The utility model aims to provide a liquid-cooled energy storage system to solve the technical problem of optimizing its heat dissipation structure.

[0007] The liquid-cooled energy storage system of the utility model is implemented as follows:

[0008] A liquid-cooled energy storage system, comprising:

[0009] A cabinet, the cabinet comprising at least two storage compartments separated in length by at least one partition frame; each of the storage compartments comprises a first storage compartment and a second storage compartment separated in height by a partition plate;

[0010] A battery cluster assembly, comprising battery clusters disposed one-to-one in a first receiving compartment of each receiving compartment;

[0011] A liquid cooler assembly, comprising a liquid cooler disposed one-to-one in the second storage compartment of each storage compartment, each liquid cooler being connected to a battery cluster; and

[0012] The high-voltage box assembly comprises high-voltage boxes which are arranged one by one in the second accommodating compartment of each accommodating interval, and each high-voltage box is adapted to a battery cluster.

[0013] In an optional implementation of the present invention, the high-pressure box and the liquid cooler in each of the accommodating intervals are arranged side by side along the width direction of the cabinet.

[0014] In an optional implementation of the present invention, a baffle is provided between the high-pressure box and the liquid cooler in each of the accommodating intervals.

[0015] In an optional implementation of the present invention, each liquid cooler is connected to the corresponding battery cluster via a liquid cooling pipeline.

[0016] In an optional implementation of the present invention, each of the battery clusters includes at least two battery packs arranged in series along the height direction of the cabinet; and

[0017] The liquid cooling pipeline includes liquid cooling branches respectively connected to a battery pack, and a liquid cooling main pipe connected to the liquid cooling branches.

[0018] In an optional implementation of the present invention, each of the first accommodating compartments is provided with a support plate corresponding to each battery pack.

[0019] In an optional implementation of the present invention, each of the partition frames comprises at least two support columns arranged at intervals; and

[0020] The liquid cooling main pipe is arranged in an empty space formed by two adjacent supporting columns.

[0021] In an optional implementation of the present invention, the first containing bin is located below the second containing bin; and

[0022] The top of the cabinet is provided with at least one exhaust port penetrating the second containing chamber.

[0023] In an optional implementation of the present invention, the number of the exhaust vents provided on the top of the cabinet is the same as the number of the liquid coolers, and one exhaust vent corresponds to one liquid cooler.

[0024] In an optional implementation of the utility model, an exhaust fan is provided in each of the exhaust ports.

[0025] By adopting the above technical solution, the utility model has the following beneficial effects: in the liquid-cooled energy storage system of the utility model, the liquid cooler assembly and the battery cluster assembly are arranged up and down along the height direction of the cabinet, which can improve the space utilization inside the cabinet on the one hand; on the other hand, it reduces the transmission distance of the liquid cooling pipeline, thereby reducing the loss during liquid cooling and improving the overall energy utilization efficiency.

[0026] Furthermore, each liquid cooler is connected to a battery cluster, that is, each liquid cooler is connected to the liquid cooling cycle of the corresponding battery cluster, thereby realizing thermal management of a single battery cluster. Each battery cluster is connected to a liquid cooler separately, which can more accurately manage the thermal performance of the battery cluster and reduce the temperature difference between multiple battery clusters in the cabinet.

[0027] In addition, a partition is provided between the liquid cooler and the corresponding battery cluster. The partition not only improves the convenience of installation and fixation of the liquid cooler, but also isolates the heat emitted by the liquid cooler itself during operation, thereby preventing the heat from being emitted to one side of the battery cluster and affecting the battery cluster. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a first-view structural schematic diagram of the liquid-cooled energy storage system of the utility model;

[0029] Figure 2 Shown is a second perspective structural schematic diagram of the liquid-cooled energy storage system of the utility model;

[0030] Figure 3 Shown is a schematic diagram of a storage compartment of a liquid-cooled energy storage system of the utility model in one implementation;

[0031] Figure 4 Shown is a schematic diagram of a receiving compartment of the liquid-cooled energy storage system of the utility model in another implementation;

[0032] Figure 5 Shown is a schematic diagram of an exhaust fan provided in the exhaust port of the liquid-cooled energy storage system of the present invention.

[0033] In the figure: cabinet 1, partition frame 2, support column 21, first accommodating compartment 31, second accommodating compartment 32, partition plate 33, support plate 34, baffle plate 35, exhaust port 36, battery cluster 4, battery pack 41, liquid cooler 5, liquid cooling branch pipe 61, liquid cooling main pipe 62, high-voltage box 7, exhaust fan 8. DETAILED DESCRIPTION

[0034] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0035] Example 1: Please refer to Figures 1 to 5 As shown, this embodiment provides a liquid-cooled energy storage system, including: a cabinet 1 and a battery cluster assembly, a liquid cooler assembly and a high-voltage box assembly arranged in the cabinet 1.

[0036] Specifically, first, the cabinet 1, in combination with the shape of the cabinet 1 that is generally used more often, adopts a rectangular parallelepiped structure, that is, the cabinet 1 includes three dimensions: length, width, and height. In this regard, the multiple battery clusters 4 included in the battery cluster 4 group are distributed along the length direction of the cabinet 1, which can improve the effective utilization rate of the internal space of the cabinet 1.

[0037] Based on the above situation, further, in conjunction with the attached drawings, an optional implementation is given as an example, the cabinet 1 includes six storage compartments formed by dividing the length direction thereof by five partition frames 2; each storage compartment includes a first storage compartment 31 and a second storage compartment 32 formed by dividing the height direction thereof by a partition plate 33. The first storage compartment 31 here is used to place the battery cluster assembly, and the second storage compartment 32 is used to place the liquid cooling machine assembly. The partition plate 33 here can not only improve the convenience of installing and fixing the liquid cooling machine assembly, but also can isolate the heat emitted by the liquid cooling machine assembly itself during operation, so as to prevent the heat from being emitted to one side of the battery cluster assembly and affecting the battery cluster assembly.

[0038] Since a partition plate 33 is provided here, theoretically, the first storage compartment 31 can be above the second storage compartment 32, or the first storage compartment 31 can be below the second storage compartment 32. In this regard, this embodiment does not make an absolute limitation on the positional relationship between the first storage compartment 31 and the second storage compartment 32. This embodiment, in conjunction with the accompanying drawings, only takes the case where the first storage compartment 31 is below the second storage compartment 32 as an example. The liquid cooling machine assembly and the battery cluster assembly are arranged in an up-and-down manner along the height direction of the cabinet 1. On the one hand, it can improve the space utilization inside the cabinet 1; on the other hand, it reduces the transmission distance of the liquid cooling pipeline, thereby reducing the loss during liquid cooling and improving the overall energy utilization efficiency.

[0039] Next, the battery cluster assembly is described: it includes six battery clusters 4 arranged in a row along the length direction of the cabinet 1; a battery cluster 4 is placed in the first storage compartment 31 of a storage area. Each battery cluster 4 includes at least two battery packs 41 arranged in series along the height direction of the cabinet 1. This embodiment takes seven battery packs 41 used in series as an example.

[0040] Based on the above situation, in an optional implementation, the seven battery packs 41 can be directly stacked together for use, or each first storage compartment 31 can be provided with a support plate 34 corresponding to each battery pack 41, that is, the adjacent battery packs 41 in the seven battery packs 41 are isolated by support plates 34. This embodiment does not make an absolute limitation on this.

[0041] Next, let’s talk about the liquid cooler components:

[0042] The liquid cooling machine assembly includes six liquid cooling machines 5 arranged in a row in the length direction of the cabinet 1 and disposed in the second storage compartment 32. Each liquid cooling machine 5 is connected to a battery cluster 4. One liquid cooling machine 5 is placed in the second storage compartment 32 of one storage interval. Each liquid cooling machine 5 is connected to a battery cluster 4, that is, each liquid cooling machine 5 is connected to the liquid cooling cycle of the corresponding battery cluster 4, so as to realize the thermal management of a single battery cluster 4. Each battery cluster 4 is connected to a liquid cooling machine 5 separately, so that the thermal management of the battery cluster 4 can be more accurately performed, and the temperature difference between the multiple battery clusters 4 in the cabinet 1 can be reduced.

[0043] Furthermore, each liquid cooling machine 5 is connected to the corresponding battery cluster 4 via a liquid cooling pipeline. Specifically, the liquid cooling pipeline includes a liquid cooling branch pipe 61 connected to each battery pack 41, and a liquid cooling main pipe 62 connected to the liquid cooling branch pipe 61; that is, only one liquid cooling main pipe 62 is required for one battery cluster 4.

[0044] In order to place the liquid cooling pipe 62, each partition frame 2 in this embodiment includes three support columns 21 arranged at intervals, and the liquid cooling pipe 62 is arranged in an empty space formed by two adjacent support columns 21. Under such a structure, the partition frame 2 and the liquid cooling pipe 62 do not interfere with each other.

[0045] Next, we will explain the high voltage box components:

[0046] The high-voltage box assembly includes six high-voltage boxes 7 arranged in a row in the second storage compartment 32 and along the length direction of the cabinet 1, and each high-voltage box 7 is adapted to a battery cluster 4. A high-voltage box 7 is placed in the second storage compartment 32 of a storage interval. It should be noted that the high-voltage box 7 here is provided with a battery management module, a high-voltage protection device, and a high- and low-voltage busbar harness, which is a prior art, and its structure and function are not described in detail in this embodiment.

[0047] Furthermore, it should be noted that the high-voltage box 7 and the liquid cooler 5 in each storage interval are arranged side by side along the width direction of the cabinet 1. Under this design, the space utilization rate of the second storage compartment 32 of the storage compartment can be improved, that is to say, for the arrangement of the high-voltage box 7 here, the size difference between the battery pack 41 and the liquid cooler 5 in the same storage compartment along the width direction of the cabinet 1 is cleverly utilized. Specifically, since a liquid cooler 5 and a battery cluster 4 are distributed in a storage interval, at this time, for this storage interval, the length and width of its first storage compartment 31 and the second storage compartment 32 are preferably the same, and in general, the size of the liquid cooler 5 along the width direction of the cabinet 1 is smaller than the size of the battery pack 41 in the battery cluster 4. Therefore, the excess storage space formed in the second storage compartment 32 due to the above-mentioned size difference is used to accommodate the high-voltage box 7, and there is no need to set up an additional high-voltage box 7 in other parts of the cabinet 1.

[0048] Based on the above structure, this embodiment also has the following designs:

[0049] A baffle plate 35 is provided between the high-pressure box 7 and the liquid cooling machine 5 in each accommodating interval, so as to prevent the temperature of the liquid cooling unit from affecting the high-pressure box 7 when it is in operation.

[0050] Finally, it should be noted that, it is understandable that the liquid-cooled energy storage system of this embodiment also includes an electrical control module (not shown in the figure). The electrical control module can be arranged on the outside of the cabinet 1. The high-voltage box 7 and the liquid cooling unit in this embodiment are electrically connected to the electrical control module respectively. The electrical control module can be used to control each of the above structures separately, and provide electrical energy to each of the above structures to realize the control of the operation of the entire liquid-cooled energy storage system. The electrical control module is preferably a PLC in the prior art, and its structure and principle are not described in detail in this embodiment.

[0051] Example 2: Please refer to Figures 1 to 5 As shown, based on the liquid-cooled energy storage system of Example 1, the top of the cabinet 1 of the liquid-cooled energy storage system provided in this embodiment is also provided with at least one exhaust port 36 that passes through the second storage compartment 32, and an air inlet is optionally formed on the side wall of the cabinet 1 corresponding to the second storage compartment 32.

[0052] In this regard, in a specific optional embodiment, the number of exhaust ports 36 provided on the top of the cabinet 1 is the same as that of the liquid cooler 5, and one exhaust port 36 corresponds to one liquid cooler 5. Here, in order to improve the heat dissipation effect of the liquid cooler 5, an exhaust fan 8 is optionally provided in each exhaust port 36. External air enters the cabinet 1 from the air inlet, flows through the liquid cooler 5, and is discharged from the cabinet 1 from the exhaust fan 8. In other words, the arrangement of the air outlet and the air inlet can facilitate the external air to flow through the liquid cooler 5, thereby improving the heat dissipation efficiency of the liquid cooler 5.

[0053] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0054] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship 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.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A liquid-cooled energy storage system, characterized in that: include: A cabinet, the cabinet comprising at least two storage compartments separated in length by at least one partition frame; each of the storage compartments comprises a first storage compartment and a second storage compartment separated in height by a partition plate; A battery cluster assembly, comprising battery clusters disposed one-to-one in a first receiving compartment of each receiving compartment; A liquid cooler assembly, comprising a liquid cooler disposed one-to-one in the second storage compartment of each storage compartment, each liquid cooler being connected to a battery cluster; as well as The high-voltage box assembly comprises high-voltage boxes which are arranged one by one in the second accommodating compartment of each accommodating interval, and each high-voltage box is adapted to a battery cluster.

2. The liquid-cooled energy storage system according to claim 1, characterized in that: The high-pressure box and the liquid cooler in each of the accommodating intervals are arranged side by side along the width direction of the cabinet.

3. The liquid-cooled energy storage system according to claim 2, characterized in that: A baffle is provided between the high pressure box and the liquid cooler in each of the accommodating intervals.

4. The liquid-cooled energy storage system according to any one of claims 1 to 3, characterized in that: Each liquid cooler is connected to the corresponding battery cluster via a liquid cooling pipeline.

5. The liquid-cooled energy storage system according to claim 4, characterized in that: Each of the battery clusters includes at least two battery packs arranged in series along the height direction of the cabinet; and The liquid cooling pipeline includes liquid cooling branches respectively connected to a battery pack, and a liquid cooling main pipe connected to the liquid cooling branches.

6. The liquid-cooled energy storage system according to claim 5, characterized in that: Each of the first containing compartments is provided with a supporting plate corresponding to each battery pack.

7. The liquid-cooled energy storage system according to claim 5, characterized in that: Each of the partition frames comprises at least two support columns arranged at intervals; and The liquid cooling main pipe is arranged in an empty space formed by two adjacent supporting columns.

8. The liquid-cooled energy storage system according to any one of claims 1 to 3, characterized in that: The first containing bin is located below the second containing bin; and The top of the cabinet is provided with at least one exhaust port penetrating the second containing chamber.

9. The liquid-cooled energy storage system according to claim 8, characterized in that: The number of the exhaust vents on the top of the cabinet is the same as that of the liquid cooler, and one exhaust vent corresponds to one liquid cooler.

10. The liquid-cooled energy storage system according to claim 9, characterized in that: Each of the air exhaust ports is provided with an exhaust fan.

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