Energy storage system

Abstract

The utility model discloses an energy storage system, which comprises a structural box body, and a battery module and a heat management unit which are arranged in the structural box body, and the heat management unit comprises a liquid cooling host, an air cooling heat dissipation module and a liquid cooling management module used for managing the distribution of cooling liquid of the liquid cooling host, and the liquid cooling host, the liquid cooling management module and the air cooling heat dissipation module are respectively positioned at different side parts of the battery module. According to the energy storage system, the whole heat management unit is divided into three functional modules, the size of each functional module is greatly reduced, the position of each functional module in the heat management unit relative to the battery module is reasonably arranged, the available space of the structural box body is more fully utilized, the integration level of the whole energy storage system is finally improved, and the energy storage efficiency is improved. Therefore, more battery modules can be arranged in the limited space, and the overall power density of the whole energy storage system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of structural layout of equipment, in particular to an energy storage system. Background Art

[0002] With the rapid development of the energy storage industry, in the process of developing large-scale energy storage devices, higher and higher requirements are put forward for the power density of the system. From the perspective of structural modules, the current layout of energy storage systems mainly includes structural boxes, battery modules, conversion modules, thermal management systems, electrical modules and fire protection modules. The layout of traditional energy storage systems is relatively simple. Its thermal management system currently mainly adopts an integrated thermal management unit, and the entire large thermal management unit is usually set on one side of the battery module. This type of thermal management unit has a weak ability to meet customized requirements in terms of external dimensions. This leads to limited flexibility in the layout of the thermal management unit in the system solution, and it cannot reasonably and effectively improve the overall spatial layout of the system, which ultimately leads to a low power density of the whole machine.

[0003] In summary, how to solve the problem of low overall power density caused by limited layout of thermal management units in energy storage systems has become a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0004] In view of this, the utility model provides an energy storage system to solve the problem of low power density of the whole machine due to limited layout of the thermal management unit of the energy storage system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An energy storage system comprises a structural box, a battery module and a thermal management unit installed in the structural box, wherein the thermal management unit comprises a liquid-cooled host, an air-cooled heat dissipation module and a liquid-cooled management module for managing the distribution of coolant of the liquid-cooled host, wherein the liquid-cooled host and the liquid-cooled management module are located at different sides of the battery module from the air-cooled heat dissipation module.

[0007] Optionally, the liquid-cooled host, the air-cooled heat dissipation module and the liquid-cooled management module are installed in the structural box in a split and independent manner or in an integrated manner.

[0008] Optionally, the air-cooling heat dissipation module is a flat structure, and is arranged on the top of the structural box.

[0009] Optionally, an explosion relief installation area is reserved on the top of the structural box, and the explosion relief installation area is used to install an explosion relief component.

[0010] Optionally, the liquid cooling host and the liquid cooling management module are arranged adjacent to each other, and both are arranged on the same end side of the structural box.

[0011] Optionally, the liquid-cooled host and the liquid-cooled management module are both arranged adjacent to the air-cooled heat dissipation module.

[0012] Optionally, a fire protection module, an electrical cabinet and a wiring cabinet are also installed in the structural box, and the fire protection module, the electrical cabinet, the wiring cabinet, the liquid cooling host and the liquid cooling management module are arranged on the same end side of the structural box.

[0013] Optionally, the fire protection module, the electrical cabinet and the wiring cabinet are arranged along the depth direction of the structural box.

[0014] Optionally, a liquid cooling installation area is reserved on the tops of the fire protection module, the electrical cabinet and the wiring cabinet, and the liquid cooling host and the liquid cooling management module are both installed in the liquid cooling installation area.

[0015] Optionally, the air-cooling heat dissipation module is arranged on the back wall of the structural box body; or, the air-cooling heat dissipation module is arranged on the end wall of the structural box body; or, the air-cooling heat dissipation module is arranged on the front wall of the structural box body.

[0016] Optionally, when the air-cooling heat dissipation module is arranged on the front side wall of the structural box body, the front side wall is provided with at least one openable and closable cabinet door, the air-cooling heat dissipation module is arranged on the cabinet door, and when the number of the cabinet doors is multiple, the number of the air-cooling heat dissipation modules is also multiple, and the air-cooling heat dissipation modules on any two cabinet doors are independent of each other.

[0017] Optionally, a conversion module is also installed in the structural box, and the conversion module is arranged below the battery module.

[0018] Beneficial effects of the utility model:

[0019] The energy storage system provided by the utility model includes a structural box, a battery module and a thermal management unit installed in the structural box, the thermal management unit includes a liquid-cooled host, an air-cooled heat dissipation module and a liquid-cooled management module for managing the distribution of coolant of the liquid-cooled host, and the liquid-cooled host and the liquid-cooled management module are respectively located at different side parts of the battery module from the air-cooled heat dissipation module. In the actual application process of the energy storage system, by splitting the thermal management unit into a liquid-cooled host, an air-cooled heat exchange module and a liquid-cooled management module, the entire thermal management unit is divided into three functional modules, and the size of a single functional module is greatly reduced. In addition, by reasonably arranging the position of each functional module in the thermal management unit relative to the battery module, the available space of the structural box is more fully utilized, which ultimately helps to improve the integration of the entire energy storage system, so that more battery modules can be arranged in a limited space, that is, it helps to improve the overall power density of the entire energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective structural arrangement diagram of an energy storage system when the air-cooling heat dissipation module provided in an embodiment of the utility model is arranged on the top of the structural box, and the liquid-cooling host and the liquid-cooling management module are arranged on one end side of the battery module;

[0021] Figure 2 A schematic diagram of the top structural arrangement of the energy storage system when the air-cooling heat dissipation module provided in the embodiment of the utility model is arranged on the top of the structural box, and the liquid-cooling host and the liquid-cooling management module are arranged on one end side of the battery module;

[0022] Figure 3 A perspective structural arrangement diagram of the energy storage system when the air-cooling heat dissipation module provided in the embodiment of the utility model is arranged on the top of the structural box, and the liquid-cooling host and the liquid-cooling management module are arranged on the other end side of the battery module;

[0023] Figure 4 A schematic diagram of the perspective structural arrangement of the energy storage system when the air-cooling heat dissipation module provided in the embodiment of the utility model is arranged on the front side box wall of the structural box;

[0024] Figure 5 A schematic diagram of the perspective structural arrangement of the energy storage system when the air-cooling heat dissipation module provided by the embodiment of the utility model is arranged on the back wall of the structural box body;

[0025] Figure 6 A schematic perspective structural arrangement diagram of an energy storage system when the air-cooling heat dissipation module provided in an embodiment of the utility model is arranged on the end side box wall of the structural box body.

[0026] In the figure:

[0027] 1. Structural box; 2. Battery module; 3. Conversion module; 4. Explosion venting assembly; 5. Thermal management unit; 51. Liquid-cooled host; 52. Air-cooled heat dissipation module; 521. Air inlet; 522. Air outlet; 53. Liquid-cooled management module; 6. Fire protection module; 7. Electrical cabinet; 8. Wiring cabinet. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] Reference Figure 1-Figure 6As shown, the embodiment of the utility model specifically provides an energy storage system, including a structural box 1 and a battery module 2 and a thermal management unit 5 installed in the structural box 1, wherein the thermal management unit 5 is mainly used to control the temperature of the structural box 1, which can be cooling and heat dissipation, or preheating at startup. In actual application, it can be configured according to actual needs; in addition, the thermal management unit 5 can specifically include a liquid-cooled host 51, an air-cooled heat dissipation module 52 and a liquid-cooled management module 53 for managing the distribution of coolant of the liquid-cooled host 51, wherein the liquid-cooled management module 53 can specifically be a multi-way valve group, and the liquid-cooled host 51 establishes a circulation loop with the heat exchanger of the battery module 2 through the liquid-cooled management module 53, and then can adjust the temperature of the battery module 2 to make its operation more stable; in addition, the liquid-cooled host 51 and the liquid-cooled management module 53 are respectively located at different sides of the battery module 2 with the air-cooled heat dissipation module 52.

[0033] In actual application, the energy storage system splits the thermal management unit 5 into a liquid-cooled main unit 51, an air-cooled heat exchange module 52 and a liquid-cooled management module 53, and the liquid-cooled main unit 51 and the liquid-cooled management module 53 and the air-cooled heat dissipation module 52 are respectively located at different sides of the battery module 2. Compared with the traditional integrated thermal management unit, the entire thermal management unit 5 is split into three functional modules, and the size of a single functional module is greatly reduced. In addition, by reasonably arranging the position of each functional module in the thermal management unit 5 relative to the battery module 2, the available space of the structural box 1 is more fully utilized, which ultimately helps to improve the integration of the entire energy storage system, so that more battery modules 2 can be arranged in a limited space, which helps to improve the overall power density of the entire energy storage system.

[0034] In an optional embodiment, the liquid-cooled host 51 , the air-cooled heat dissipation module 52 and the liquid-cooled management module 53 can be installed and arranged independently in a split type in the structural box 1 , which makes it more convenient to layout each functional module in the thermal management unit 5 .

[0035] In other optional embodiments, the liquid-cooled host 51, the air-cooled heat dissipation module 52 and the liquid-cooled management module 53 can also be installed in an integrated manner in the structural box 1, as long as at least one of the liquid-cooled host 51, the air-cooled heat dissipation module 52 and the liquid-cooled management module 53 is located at a different side of the battery module 2 than the remaining ones. In addition, it should be noted that the liquid-cooled host 51, the air-cooled heat dissipation module 52 and the liquid-cooled management module 53 are installed in an integrated manner in the structural box 1, which means that the three are connected.

[0036] In some specific embodiments, reference Figure 1-Figure 3The air cooling and heat dissipation module 52 may specifically adopt a flat structure, and is arranged on the top of the structural box 1. By designing the air cooling and heat dissipation module 52 as a flat structure, the air cooling and heat dissipation module 52 can better utilize the top space of the structural box 1.

[0037] In addition, since the air-cooling and heat dissipation module 52 does not need to occupy the entire area of ​​the top of the entire structural box 1, a certain top area can be reserved at the rear end of the depth direction of the structural box 1 for the explosion relief function (currently through product research, the design end and the client are more inclined to the top explosion relief solution, and require that there should be no product blocking above the explosion relief area). In this way, when the top space of the structural box 1 is laid out, the air-cooling and heat dissipation module and the explosion relief area can be effectively integrated to improve the space utilization rate of the top; specifically, in addition to installing the air-cooling and heat dissipation module 52 on the top of the structural box 1, an explosion relief installation area can also be reserved, and the explosion relief installation area is used to install the explosion relief component 4. The explosion relief component 4 can avoid the explosion inside the structural box 1, which may cause the cabinet door of the structural box 1 to blow off and injure people. It should be noted that the depth direction of the structural box 1 is defined based on the door opening side of the structural box 1, and the depth direction refers to the direction from the door opening side to the back door side.

[0038] Of course, it is understandable that, in addition to being installed on the top of the structural box 1, the explosion relief assembly 4 can also be installed in other positions according to actual needs. For example, the explosion relief assembly 4 can also be installed on the front side box wall of the structural box 1. Since the explosion pressure and flame released to the surrounding environment when the explosion relief assembly 4 is fully opened when the front explosion relief is adopted will cause harm to the surrounding objects and personnel, an explosion relief guide structure is installed at the same time when the front explosion relief is performed, thereby reducing and reducing the harm to objects and personnel caused by the explosion relief. At this time, the explosion relief assembly 4 can specifically include an explosion relief part and an explosion relief guide part, wherein the explosion relief part is mainly used to open the pressure relief when the pressure in the structural box 1 exceeds the preset pressure, and its specific structural form can be the structural form of the explosion relief plate, or other explosion relief structures commonly used by technicians in this field, which will not be further specifically limited here; the explosion relief guide part is mainly used to guide the pressure relief airflow when the explosion relief part is opened, and it can specifically be a guide plate installed on the explosion relief plate, or other structures with airflow guidance. By designing the explosion relief assembly 4 into the above-mentioned structural form, when an explosion occurs inside the structural box 1, the explosion relief part can automatically open to relieve pressure, and the pressurized airflow and flame can be guided and released through the explosion relief guide part, thereby reducing the degree of explosion hazard and minimizing the harm to surrounding objects and personnel when the system explodes.

[0039] For another example, the explosion relief assembly 4 is installed on the back wall of the structural box body 1; or the explosion relief assembly 4 is installed on the end wall of the structural box body 1. In actual application, specific configuration can be performed according to actual needs.

[0040] It should be noted that the front box wall and the rear box wall in this application are defined based on the structural box body 1 itself, the box wall on the door opening side of the structural box body 1 is the front box wall, and the box wall opposite to the box wall on the door opening side is the back box wall. In addition, those skilled in the art should be able to understand that since the main electrical component loaded in the structural box body 1 is the battery module 2, that is, the battery module 2 occupies the largest space in the structural box body 1, therefore, the end side of the battery module 2 is also the end side of the structural box body 1, and the end side of the structural box body 1 refers to the left or right side when facing the door opening side of the structural box body 1.

[0041] In a further embodiment, the liquid-cooled host 51 and the liquid-cooled management module 53 are preferably designed to be arranged adjacent to each other, and the two are arranged on the same end side of the structural box 1. By designing to this structural form, the liquid-cooled host 51 and the liquid-cooled management module 53 are spatially adjacent to each other, which facilitates the later arrangement of pipelines between various functional modules. In addition, the liquid-cooled host 51 and the liquid-cooled management module 53 are preferably designed to be arranged adjacent to the air-cooled heat dissipation module 52. By designing to this structural form, the later arrangement of pipelines and electrical communications between various functional modules is more convenient.

[0042] In some other specific implementation schemes, the above-mentioned structural box 1 may also be installed with a fire module 6, an electrical cabinet 7 and a wiring cabinet 8, and the fire module 6, the electrical cabinet 7, the wiring cabinet 8, the liquid cooling host 51 and the liquid cooling management module 53 are arranged at the same end side of the structural box 1, which may be the left end side of the structural box 1 or the right end side of the structural box 1. The left end side and the right end side here are both defined based on the door opening side facing the structural box 1. By arranging these five at the same end side of the structural box 1, the five are spatially adjacent to each other, which facilitates the arrangement of pipelines and electrical communications between the functional modules in the later stage.

[0043] In a further implementation scheme, the fire protection module 6, electrical cabinet 7 and wiring cabinet 8 can be specifically designed to be arranged along the depth direction of the structural box 1, for example, arranged in sequence along the depth direction of the structural box 1, and of course the order of the three can be changed according to demand; in addition, a liquid cooling installation area can be reserved on the top of the fire protection module 6, electrical cabinet 7 and wiring cabinet 8, and the liquid cooling host 51 and the liquid cooling management module 53 are both installed in the liquid cooling installation area. By arranging in the above structural form, the structural layout is more compact and the space utilization rate is higher, which helps to increase the installed capacity of the battery module 2 on the basis of the structural box 1 of the same size.

[0044] In some other specific implementation schemes, the arrangement position of the air cooling module 52 can be selected according to the arrangement requirements. In addition to being arranged on the top of the structural box 1, it can also be arranged on the back wall of the structural box 1. Figure 5 Or the air cooling module 52 is arranged on the end side wall of the structural box body 1, refer to Figure 6 In addition, the air-cooling heat dissipation module 52 can also be arranged on the front wall of the structural box body 1, referring to Figure 4 As shown. In actual application, it can be configured according to specific needs, and no more specific limitations are given here. It should be noted that the air-cooling heat dissipation module 52 generally includes an air inlet 521 and an air outlet 522, and specifically the air inlet 521 can be arranged at the upper part of the air-cooling heat dissipation module 52, and the air outlet 522 can be arranged at the lower part of the air-cooling heat dissipation module 52; or the air inlet 521 can be arranged at the lower part of the air-cooling heat dissipation module 52, and the air outlet 522 can be arranged at the upper part of the air-cooling heat dissipation module 52. In actual application, the arrangement can be selected according to actual needs, and no more specific limitations are given here.

[0045] In some specific implementation schemes, according to the general structural dimensions of the structural box body 1, the overall area of ​​the front side wall or the back side wall of the structural box body 1 is generally much larger than the overall area of ​​the top side wall of the structural box body 1. Therefore, designing the air-cooled heat dissipation module 52 on the front side wall of the structural box body 1 can greatly increase the heat dissipation area, which is beneficial to improving the overall heat exchange efficiency of the thermal management system.

[0046] In addition, when the air cooling module 52 can also be arranged on the front wall of the structural box body 1, refer to Figure 4 As shown, the front wall of the structural box 1 can be provided with at least one openable and closable cabinet door, and the air-cooling and heat dissipation module 52 is provided on the cabinet door. When there are multiple cabinet doors, there are also multiple air-cooling and heat dissipation modules 52, and the air-cooling and heat dissipation modules 52 on any two cabinet doors are independent of each other. By designing into this structural form, the loading space corresponding to each cabinet door can independently meet the air-cooling and heat dissipation requirements, and maintenance is more convenient.

[0047] In some specific implementation schemes, a conversion module 3 is generally installed in the structural box 1. Figure 1As shown, the conversion module 3 is generally arranged below the battery module 2. By arranging the conversion module 3 below the battery module 2, the electrical communication connection between the two is more convenient. It should be noted that a heat insulation layer is generally provided between the conversion module 3 and the battery module 2. The purpose of the heat insulation layer is mainly to insulate the battery cluster compartment where the battery module 2 is located from the installation compartment where the conversion module 3 is located. Because according to the actual operating conditions of the large-scale energy storage system, the probability of fire caused by electrical arcing inside the conversion module 3 is much greater than the probability of thermal runaway fire of the battery cluster itself. Arranging a heat insulation layer between the two can effectively reduce the risk of heat diffusion to the battery module 2 caused by arcing inside the conversion module 3. Even if an electrical arc occurs inside the conversion module 3 and causes a fire, under the action of the heat insulation layer, the flame generated by the arcing fire of the conversion module 3 mainly spreads in the direction away from the heat insulation layer.

[0048] It should be noted that the method of installing the conversion module 3 below the battery module 2 is only an example of the embodiment of the present invention. In actual application, it can also be arranged in other positions according to actual needs. For example, the conversion module 3 is arranged on the top of the battery module 2, or on the end side of the battery module 2.

[0049] When the conversion module 3 is arranged on the top of the battery module 2, the conversion module 3 itself will occupy the depth dimension of the structural box 1. If the explosion-proof assembly 4 is loaded at this time, the explosion-proof assembly 4 is obviously no longer suitable for installation on the top side wall of the structural box 1. Therefore, the explosion-proof assembly 4 can be installed on the front side wall and / or the back side wall.

[0050] When the conversion module 3 is arranged on the end side of the battery module 2, the explosion-proof assembly 4 can be installed on the front box wall of the structural box body 1, the back box wall of the structural box body 1, the top box wall of the structural box body 1, or the other end side wall of the structural box body 1 opposite to the end side where the conversion module 3 is located. In actual application, it can be configured according to actual needs, and no more specific limitations are made here.

[0051] In addition, it should be noted that the conversion module 3 may be a PCS module, a switch box, or a DC / DC module. This embodiment does not specifically limit the form of the conversion module 3.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An energy storage system, comprising a structural box (1) and a battery module (2) and a thermal management unit (5) installed in the structural box (1), characterized in that: The thermal management unit (5) comprises a liquid-cooled host (51), an air-cooled heat dissipation module (52), and a liquid-cooled management module (53) for managing the distribution of cooling liquid of the liquid-cooled host (51); the liquid-cooled host (51) and the liquid-cooled management module (53) are respectively located at different sides of the battery module (2) from the air-cooled heat dissipation module (52).

2. The energy storage system according to claim 1, characterized in that: The liquid-cooling mainframe (51), the air-cooling heat dissipation module (52) and the liquid-cooling management module (53) are installed in the structural box (1) in a split and independent manner or in an integrated manner.

3. The energy storage system according to claim 1, characterized in that: The air-cooling heat dissipation module (52) is a flat structure, and is arranged on the top of the structural box (1).

4. The energy storage system according to claim 1, characterized in that: An explosion relief installation area is also reserved on the top of the structural box (1), and the explosion relief installation area is used to install an explosion relief component (4).

5. The energy storage system according to claim 1, characterized in that: The liquid cooling host (51) and the liquid cooling management module (53) are arranged adjacent to each other, and both are arranged on the same end side of the structural box (1).

6. The energy storage system according to claim 5, characterized in that: The liquid-cooling host (51) and the liquid-cooling management module (53) are both arranged adjacent to the air-cooling heat dissipation module (52).

7. The energy storage system according to claim 5, characterized in that: A fire protection module (6), an electrical cabinet (7) and a wiring cabinet (8) are also installed in the structural box (1), and the fire protection module (6), the electrical cabinet (7), the wiring cabinet (8), the liquid cooling host (51) and the liquid cooling management module (53) are arranged on the same end side of the structural box (1).

8. The energy storage system according to claim 7, characterized in that: The fire protection module (6), the electrical cabinet (7) and the wiring cabinet (8) are arranged along the depth direction of the structural box (1).

9. The energy storage system according to claim 8, characterized in that: A liquid cooling installation area is reserved on the tops of the fire protection module (6), the electrical cabinet (7) and the wiring cabinet (8), and the liquid cooling host (51) and the liquid cooling management module (53) are both installed in the liquid cooling installation area.

10. The energy storage system according to claim 1, characterized in that: The air-cooling and heat dissipation module (52) is arranged on the back wall of the structural box body (1); or, the air-cooling and heat dissipation module (52) is arranged on the end wall of the structural box body (1); or, the air-cooling and heat dissipation module (52) is arranged on the front wall of the structural box body (1).

11. The energy storage system according to claim 10, characterized in that: When the air-cooling heat dissipation module (52) is arranged on the front side wall of the structural box body (1), the front side wall is provided with at least one cabinet door that can be opened and closed, and the air-cooling heat dissipation module (52) is arranged on the cabinet door. When the number of the cabinet doors is multiple, the number of the air-cooling heat dissipation modules (52) is also multiple, and the air-cooling heat dissipation modules (52) on any two of the cabinet doors are independent of each other.

12. The energy storage system according to claim 1, characterized in that: A conversion module (3) is also installed in the structural box (1), and the conversion module (3) is arranged below the battery module (2).

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