Energy storage liquid-cooled battery pack and outdoor energy storage cabinet

Abstract

This application provides an energy storage liquid-cooled battery pack and an outdoor energy storage cabinet, belonging to the field of new energy battery technology. This application incorporates a fire-fighting module within the battery casing. The fire-fighting module includes a fire-fighting bracket and a fire-extinguishing module. The fire-fighting bracket is positioned between the upper cover and the battery module, with a gap between them. The fire-extinguishing module is fixed to the fire-fighting bracket. When the battery module is subjected to abnormalities such as impact, compression, overcharging, or over-discharging, it generates a large amount of heat. As this heat accumulates within the battery box, the internal temperature rises, potentially causing the battery module to ignite due to high temperature. When the fire-extinguishing module detects abnormal heat, it activates to extinguish the fire, preventing the fire from spreading and causing significant damage to property and lives if not dealt with promptly.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, specifically relating to an energy storage liquid-cooled battery pack and an outdoor energy storage cabinet. Background Technology

[0002] The battery pack mainly consists of a casing, battery modules, and related accessories. If the battery modules experience abnormalities such as collisions, compression, overcharging, or over-discharging, a large amount of heat may be generated. As the heat accumulates inside the battery box, the temperature inside the battery box continues to rise, which may cause the battery modules to burn due to high temperature. If not handled in a timely and proper manner, it will cause significant losses to people's property and lives. In addition, the battery pack needs to meet certain waterproof requirements in actual use. Utility Model Content

[0003] This utility model provides an energy storage liquid-cooled battery pack and an outdoor energy storage cabinet, which aims to solve the technical problem of heat accumulation in the battery pack in the prior art.

[0004] Firstly, to achieve the above objectives, the technical solution adopted in this application is as follows: A liquid-cooled energy storage battery pack includes a sealed upper shell and a liquid-cooling plate. The sealed upper shell has a receiving cavity for accommodating a battery module, and the sealed upper shell is sleeved on the outside of the battery module. The liquid-cooling plate is disposed below the sealed upper shell and connected to it. The liquid-cooling plate has a flow channel inside, and an inlet and an outlet are provided on the liquid-cooling plate, respectively connected to both ends of the flow channel.

[0005] The liquid cooling plate and the sealed upper housing together form a sealed cavity for accommodating the battery module.

[0006] In one possible implementation, the liquid cooling plate is provided with a groove for placing the battery module.

[0007] In one possible implementation, thermally conductive adhesive is provided between the groove and the battery module.

[0008] In one possible implementation, a sealing ring is provided between the sealed upper housing and the liquid cooling plate.

[0009] In one possible implementation, the sealed upper housing is further provided with an explosion-proof valve.

[0010] In one possible implementation, the energy storage liquid-cooled battery pack is further provided with a temperature and voltage acquisition module, which is electrically connected to the explosion-proof valve.

[0011] In one possible implementation, the sealed upper housing is further provided with a waterproof connector, which is electrically connected to the battery module.

[0012] In a second aspect, an outdoor energy storage cabinet includes any of the energy storage liquid-cooled battery packs described in the first aspect embodiment.

[0013] Secondly, in one possible implementation, the outdoor energy storage cabinet includes a liquid-cooled module that is connected to the liquid-cooled plate.

[0014] The solution shown in this application, compared with the prior art, rapidly generates a large amount of heat when the battery module encounters abnormal situations such as collision, compression, or overcharging or over-discharging. Since the sealed upper shell tightly fits the outside of the battery module, heat is quickly conducted to the surface of the sealed upper shell. The sealed upper shell is not only a protective barrier but also an important channel for heat transfer. The flow channels within the liquid cooling plate are connected to the external cooling system, and coolant is injected from the inlet. As the coolant flows through the contact surface between the liquid cooling plate and the sealed upper shell, it absorbs heat from the surface of the sealed upper shell through heat exchange, increasing its own temperature. The heated coolant flows out through the outlet, enters the external heat dissipation device for cooling, and then returns to the inlet via a circulation pump, forming a continuous heat dissipation cycle. The sealed upper shell and the liquid cooling plate work together to form a sealed chamber. This design not only isolates the sealed chamber from the external environment, preventing the disorderly accumulation of heat inside the battery box and creating a stable environment for the coolant's heat dissipation cycle, but also provides waterproofing. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of the energy storage liquid-cooled battery pack provided in an embodiment of this utility model;

[0016] Figure 2 A three-dimensional structural schematic diagram of the liquid cooling plate provided in an embodiment of this utility model;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Sealed upper housing; 2. Liquid cooling plate; 21. Water inlet; 22. Water outlet; 23. Groove; 24. Thermally conductive adhesive; 3. Sealing ring; 11. Explosion-proof valve; 12. Waterproof connector. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0021] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0024] Please refer to the following: Figure 1 and Figure 2 The present application provides a description of an energy storage liquid-cooled battery pack and an outdoor energy storage cabinet.

[0025] A liquid-cooled energy storage battery pack includes a sealed upper housing 1 and a liquid-cooling plate 2. The sealed upper housing 1 has a receiving cavity for accommodating a battery module, and the sealed upper housing 1 is sleeved on the outside of the battery module. The liquid-cooling plate 2 is disposed below the sealed upper housing 1 and connected to the sealed upper housing 1. The liquid-cooling plate 2 has a flow channel inside, and has a water inlet 21 and a water outlet 22 on the liquid-cooling plate 2, which are respectively connected to the two ends of the flow channel.

[0026] The liquid cooling plate 2 and the sealed upper housing 1 together form a sealed cavity for accommodating the battery module.

[0027] This embodiment provides an energy storage liquid-cooled battery pack. Compared with existing technologies, when the battery module encounters abnormal situations such as collision, compression, or overcharging or over-discharging, a large amount of heat will be generated rapidly. Since the sealed upper shell 1 is tightly fitted on the outside of the battery module, the heat will be quickly conducted to the surface of the sealed upper shell 1. The sealed upper shell 1 is not only a protective barrier, but also an important channel for heat transfer. The flow channel in the liquid cooling plate 2 is connected to the external cooling system, and the coolant is injected from the inlet 21. When flowing through the contact surface between the liquid cooling plate 2 and the sealed upper shell 1, the coolant absorbs the heat from the surface of the sealed upper shell 1 through heat exchange, and its own temperature rises. The heated coolant flows out through the outlet 22, enters the external heat dissipation device for cooling, and then returns to the inlet 21 through the circulation pump, forming an uninterrupted heat dissipation cycle.

[0028] The sealed upper housing 1 and the liquid cooling plate 2 work together to form a sealed chamber. This design not only isolates the sealed chamber from the external environment, preventing heat from accumulating disorderly inside the battery box and creating a stable environment for the cooling fluid to circulate, but also serves a waterproof function.

[0029] In some embodiments, the liquid cooling plate 2 is provided with a groove 23 for placing the battery module. The battery module is placed directly in the groove 23 of the liquid cooling plate 2, ensuring full contact between the two, and the heat generated by the battery module can be directly transferred to the liquid cooling plate 2. This design can shorten the heat conduction path, enhance heat exchange efficiency, and more quickly dissipate the heat from the battery module.

[0030] Furthermore, thermally conductive adhesive 24 is provided between the groove 23 and the battery module. The thermally conductive adhesive 24, filling the tiny gaps between the groove 23 and the battery module, forms a continuous heat conduction channel, assisting in the transfer of heat from the battery module to the liquid cooling plate 2. The thermally conductive adhesive 24 can eliminate contact thermal resistance, further improving heat transfer efficiency and ensuring effective control of the battery module temperature.

[0031] Specifically, a sealing ring 3 is provided between the sealed upper housing 1 and the liquid cooling plate 2. The sealing ring 3 between the sealed upper housing 1 and the liquid cooling plate 2 is deformed during assembly, filling the gaps and preventing external moisture, dust, etc., from entering the sealed chamber. This design enhances the battery pack's sealing performance, improves waterproof and dustproof capabilities, protects the battery module from external environmental influences, and extends its service life.

[0032] In other embodiments, the sealed upper housing 1 is also equipped with an explosion-proof valve 11. When a large amount of heat and gas is generated inside the battery pack due to a malfunction, causing a sharp increase in pressure, the explosion-proof valve 11 automatically opens to release the high-pressure gas inside. This can prevent the battery pack from exploding due to excessive internal pressure, ensuring the safety of personnel and equipment and reducing the harm of accidents.

[0033] Working process and beneficial effects of explosion-proof valve 11

[0034] Work process

[0035] 1. Abnormal operating condition triggering: When the battery module experiences thermal runaway due to abnormal conditions such as collision or overcharging, the internal chemical reaction intensifies, releasing a large amount of heat and flammable gases (such as carbon monoxide and hydrogen) in a short period of time, causing the pressure in the sealed chamber to rise sharply.

[0036] 2. Pressure-sensing opening: The explosion-proof valve 11 is equipped with a pressure sensing device (such as a spring, diaphragm, etc.). When the pressure in the chamber exceeds the preset threshold, the pressure breaks through the resistance of the sensing device, causing the explosion-proof valve 11 to open automatically (such as by flipping, breaking, or popping out).

[0037] 3. Pressure relief and exhaust: After opening, the explosion-proof valve 11 forms a pressure relief channel, allowing high-pressure gas to be discharged quickly, reducing internal pressure and preventing the battery pack casing from bursting due to continuous pressure increase.

[0038] 4. Risk mitigation: During the depressurization process, some heat is released with the gas, which helps to reduce the internal temperature of the battery pack and buys time for subsequent safety measures (such as external fire extinguishing and power cut-off).

[0039] Beneficial effects

[0040] 1. Active safety protection: It achieves "overpressure relief" through physical structure, without the need for external power supply or control system, and serves as the last mechanical safety barrier for the battery pack to prevent explosion accidents.

[0041] 2. Reduce accident hazards: Rapidly release high-pressure gas to avoid fragments flying when the shell ruptures, reducing direct impact on personnel and equipment; at the same time, reduce the concentration of flammable gas inside, suppressing the risk of open flame or deflagration.

[0042] 3. Compatible sealing design: The explosion-proof valve 11 typically adopts a waterproof and dustproof sealing structure. Under normal operating conditions, it works in conjunction with the sealing ring to maintain the sealing of the battery pack. It only opens under abnormal pressure and does not affect daily waterproofing, heat dissipation and other functions.

[0043] 4. Adaptable to complex scenarios: Especially suitable for outdoor energy storage cabinets and other open-air environments. When the battery pack experiences internal failures due to high temperature, aging or other reasons, the explosion-proof valve 11 can respond independently, improving the safety of the system under extreme conditions.

[0044] Specifically, the energy storage liquid-cooled battery pack is also equipped with a temperature and voltage acquisition module, which is electrically connected to the explosion-proof valve 11. The temperature and voltage acquisition module monitors the temperature and voltage data inside the battery pack in real time. When abnormal data is detected and it is determined that there may be a safety risk, it sends a signal to the explosion-proof valve 11 to control its opening.

[0045] This design enables intelligent safety protection, provides early warnings and timely handling of potential hazards, and improves the safety and reliability of the battery pack.

[0046] Based on the above embodiments, the sealed upper housing 1 is further provided with a waterproof connector 12, which is electrically connected to the battery module. The waterproof connector 12 allows external circuitry to safely connect to the battery module via the waterproof connector 12, while its waterproof structure prevents moisture from entering the connection area.

[0047] The beneficial effects of this embodiment are: ensuring a stable connection between the battery module and the external circuit, while preventing short circuits caused by water ingress, and ensuring the safety and reliability of the battery pack's electrical connection.

[0048] In a second aspect, an outdoor energy storage cabinet includes any of the energy storage liquid-cooled battery packs in the first aspect embodiments.

[0049] Outdoor energy storage cabinets are equipped with liquid-cooled battery packs, which serve as the core energy storage unit, providing power storage and release functions for the cabinet. Leveraging the liquid cooling and waterproof features of the battery packs, outdoor energy storage cabinets can adapt to complex outdoor environments, ensuring stable operation of the energy storage system.

[0050] Furthermore, the outdoor energy storage cabinet includes a liquid-cooled module, which is connected to the liquid-cooled plate 2.

[0051] The liquid-cooled module inside the outdoor energy storage cabinet is connected to the liquid-cooled plate 2 of the battery pack. The coolant flows in the circulation system formed by the liquid-cooled module and the liquid-cooled plate 2, transferring the heat from the battery pack to the liquid-cooled module for centralized heat dissipation. This enhances the overall heat dissipation capacity, effectively manages the heat of multiple battery packs, and improves the heat dissipation efficiency and operational stability of the outdoor energy storage cabinet.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage liquid-cooled battery pack, characterized in that, include: A sealed upper housing is provided with a receiving cavity for accommodating a battery module, and the sealed upper housing is sleeved on the outside of the battery module; A liquid cooling plate is disposed below the sealed upper housing and connected to the sealed upper housing; the liquid cooling plate has a flow channel inside, and the liquid cooling plate has an inlet and an outlet, which are respectively connected to the two ends of the flow channel; The liquid cooling plate and the sealed upper housing together form a sealed cavity for accommodating the battery module.

2. The energy storage liquid-cooled battery pack as described in claim 1, characterized in that, The liquid cooling plate has a groove for placing the battery module.

3. The energy storage liquid-cooled battery pack as described in claim 2, characterized in that, Thermally conductive adhesive is provided between the groove and the battery module.

4. The energy storage liquid-cooled battery pack as described in claim 3, characterized in that: A sealing ring is provided between the sealed upper housing and the liquid cooling plate.

5. The energy storage liquid-cooled battery pack as described in claim 4, characterized in that: The sealed upper housing is also equipped with an explosion-proof valve.

6. The energy storage liquid-cooled battery pack as described in claim 5, characterized in that: The energy storage liquid-cooled battery pack is also equipped with a temperature and voltage acquisition module, which is electrically connected to the explosion-proof valve.

7. The energy storage liquid-cooled battery pack as described in claim 6, characterized in that, The sealed upper housing is also provided with a waterproof connector, which is electrically connected to the battery module.

8. An outdoor energy storage cabinet, characterized in that, Including the energy storage liquid-cooled battery pack as described in any one of claims 1-7.

9. The outdoor energy storage cabinet as described in claim 8, characterized in that: The outdoor energy storage cabinet includes a liquid-cooled module, which is connected to the liquid-cooled plate.

Images