Adjustable heat dissipation energy consumption immersion energy storage battery pack

Abstract

The utility model relates to a kind of immersion energy storage battery pack of adjustable heat dissipation energy consumption in the field of energy storage battery pack, including sealed machine case and battery module, immersion liquid cooling cavity is provided in sealed machine case, immersion liquid cooling cavity injects cooling oil, cooling oil completely immerses battery module, immersion liquid cooling cavity is also provided with evaporator, oil inlet pipe and oil return pipe, the pipeline of evaporator extends to the surface of sealed machine case, evaporator can be connected air conditioner outdoor unit, the same oil pump is connected to oil inlet pipe and oil return pipe, oil inlet pipe is located at the top of immersion liquid cooling cavity, oil return pipe is located at the bottom of immersion liquid cooling cavity, evaporator is located between oil inlet pipe and battery module, the surface of oil inlet pipe and oil return pipe is equidistantly provided with several oil holes, oil inlet pipe and oil return pipe are communicated with immersion liquid cooling cavity by oil hole, when low-power operation, by evaporator and external air conditioning system connection, utilize air conditioning refrigeration to directly carry out passive heat dissipation to cooling oil in immersion liquid cooling cavity, without starting oil pump, significantly reduce system energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery packs, and in particular to an immersion energy storage battery pack with adjustable heat dissipation energy consumption. Background Technology

[0002] With the rapid development of new energy technologies, energy storage battery packs, as the core unit for energy storage and release, are widely used in power systems, electric vehicles, and renewable energy grid connection. Among them, immersion liquid cooling technology, due to its efficient heat dissipation capabilities, is gradually becoming the preferred solution for high-power energy storage systems. Traditional immersion liquid-cooled energy storage battery packs typically use oil pumps to drive the circulation of cooling oil, removing the heat generated by the battery modules through forced convection.

[0003] However, in existing technologies, regardless of whether the battery system is operating at high or low power, it relies on the continuous operation of the oil pump to maintain heat dissipation, resulting in a significant increase in energy consumption. Especially under low power or standby conditions, when the battery generates less heat, the continuous operation of the oil pump leads to energy waste. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides an immersion energy storage battery pack with adjustable heat dissipation energy consumption, which can effectively solve the technical problem of energy waste caused by the continuous operation of oil pumps.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An adjustable heat dissipation immersion energy storage battery pack includes a sealed chassis and a battery module. An immersion liquid cooling chamber is provided inside the sealed chassis. The battery module is fixedly installed inside the immersion liquid cooling chamber, which is filled with cooling oil, completely immersing the battery module. An evaporator, an oil inlet pipe, and an oil return pipe are also provided inside the immersion liquid cooling chamber. The evaporator's pipe extends to the surface of the sealed chassis and can be connected to an outdoor air conditioning unit. The oil inlet pipe and the oil return pipe traverse the immersion liquid cooling chamber, with a length greater than the size of the battery module. Both the oil inlet pipe and the oil return pipe extend to the surface of the sealed chassis and are connected to the same oil pump. The oil inlet pipe is located at the top of the immersion liquid cooling chamber, and the oil return pipe is located at the bottom. The evaporator is located between the oil inlet pipe and the battery module. Several oil holes are equidistantly arranged on the surfaces of the oil inlet pipe and the oil return pipe, communicating with the immersion liquid cooling chamber through these oil holes.

[0007] Furthermore, the battery module is composed of several battery cells connected in series or in parallel, and gap channels are formed between adjacent battery cells, in which cooling oil can flow.

[0008] Furthermore, the oil holes of the oil inlet pipe and the oil return pipe correspond to the two ends of the gap channel, respectively.

[0009] Furthermore, the sealed enclosure consists of a housing and a cover. The housing has an upward-facing immersion liquid cooling chamber, and the cover is used to close the immersion liquid cooling chamber.

[0010] Furthermore, a sealing groove is provided on the edge of the immersion liquid cooling cavity, and a sealing ring is provided in the sealing groove. When the cover is closed with the body, the cover squeezes the sealing ring, causing the sealing ring to deform and fill the sealing groove.

[0011] Furthermore, the surface of the sealed housing is provided with an oil drain port, which is connected to the immersion liquid cooling chamber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When operating at low power, the evaporator is connected to the external air conditioning system, and the air conditioning directly provides passive cooling and heat dissipation to the cooling oil in the immersion liquid cooling chamber. The thermal expansion and contraction of the cooling oil forms an automatic micro-circulation convection, eliminating the need to start the oil pump and significantly reducing system energy consumption. When operating at high power, the oil pump starts and drives the cooling oil to circulate between the oil inlet pipe, the oil return pipe, and the immersion liquid cooling chamber. Through active forced convection, a large amount of heat is quickly discharged, balancing heat dissipation efficiency and energy economy. The oil inlet pipe and the oil return pipe are respectively set at the top and bottom of the immersion liquid cooling chamber, and the oil holes evenly distributed on the surface can evenly distribute the cooling oil flow. Combined with the bidirectional circulation path formed by the oil pump, the top oil inlet penetrates downward and the bottom oil return is drawn upward, effectively eliminating the phenomenon of local stagnation of cooling oil, ensuring that the temperature distribution in all areas of the battery module is consistent and avoiding the generation of hot spots. Attached Figure Description

[0013] Figure 1 This is a front perspective view of the present invention;

[0014] Figure 2 This is a rear-view perspective view of the present invention;

[0015] Figure 3 This is an exploded view of the structure of this utility model;

[0016] Figure 4 This is a cross-sectional view of the present invention;

[0017] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0018] The numbers in the diagram are: 1-box body, 2-box cover, 3-immersion liquid cooling cavity, 4-battery module, 401-cell, 402-gap channel, 5-evaporator, 6-oil inlet pipe, 7-oil return pipe, 8-oil hole, 9-sealing ring, 10-oil drain port. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The following is combined with Figures 1-5 This invention provides a detailed description of an adjustable heat dissipation and energy consumption immersion energy storage battery pack:

[0021] An adjustable heat dissipation immersion energy storage battery pack includes a sealed chassis and a battery module 4. An immersion liquid cooling chamber 3 is provided inside the sealed chassis. The battery module 4 is fixedly installed inside the immersion liquid cooling chamber 3. Cooling oil is injected into the immersion liquid cooling chamber 3, completely immersing the battery module 4. The immersion liquid cooling chamber 3 is characterized by further including an evaporator 5, an oil inlet pipe 6, and an oil return pipe 7. The pipes of the evaporator 5 extend to the surface of the sealed chassis, and the evaporator 5 can be connected to an outdoor air conditioning unit. The oil inlet pipe 6 and the oil return pipe... 7. The lengths of the oil inlet pipe 6 and the oil return pipe 7 are greater than the size of the battery module 4. Both the oil inlet pipe 6 and the oil return pipe 7 extend to the surface of the sealed casing and are connected to the same oil pump. The oil inlet pipe 6 is located at the top of the immersion liquid cooling chamber 3, and the oil return pipe 7 is located at the bottom of the immersion liquid cooling chamber 3. The evaporator 5 is located between the oil inlet pipe 6 and the battery module 4. Several oil holes 8 are equidistantly arranged on the surface of the oil inlet pipe 6 and the oil return pipe 7. The oil inlet pipe 6 and the oil return pipe 7 are connected to the immersion liquid cooling chamber 3 through the oil holes 8.

[0022] During low-power operation, the evaporator 5 is connected to the external air conditioning system, and the air conditioning directly cools and dissipates heat to the cooling oil in the immersion liquid cooling chamber 3. The thermal expansion and contraction of the cooling oil forms an automatic micro-circulation convection, eliminating the need to start the oil pump and significantly reducing system energy consumption. During high-power operation, the oil pump starts and drives the cooling oil to circulate between the oil inlet pipe 6, the oil return pipe 7, and the immersion liquid cooling chamber 3. Through active forced convection, a large amount of heat is quickly removed, balancing heat dissipation efficiency and energy economy. The oil inlet pipe 6 and the oil return pipe 7 are respectively located at the top and bottom of the immersion liquid cooling chamber 3, and the oil holes 8 evenly distributed on the surface can evenly distribute the cooling oil flow. Combined with the bidirectional circulation path formed by the oil pump, the oil inlet at the top penetrates downward and the oil return at the bottom is drawn upward, effectively eliminating the phenomenon of local stagnation of cooling oil, ensuring that the temperature distribution in all areas of the battery module 4 is consistent and avoiding the generation of hot spots. The evaporator 5 is located between the oil inlet pipe 6 and the battery module 4. When the cooling oil flows through the evaporator 5, it is cooled down first, and then it is evenly covered on the surface of the battery module 4 through the oil inlet pipe 6, forming a heat dissipation gradient from the low temperature zone to the high temperature zone, which further enhances the heat exchange efficiency and reduces the cooling load of the air conditioning system.

[0023] The battery module 4 is composed of several battery cells 401 connected in series or in parallel. A gap channel 402 is formed between adjacent battery cells 401, through which cooling oil can flow. This allows the cooling oil to flow directly into the narrow space between the battery cells 401, fully contacting the surface of the battery cells 401 and significantly improving heat transfer efficiency. At the same time, the distribution of the gap channels 402 matches the arrangement of the battery cells 401, forming a directional flow path. This prevents the cooling oil from forming a flow blind zone inside the module and eliminates local temperature differences. Since the battery cells 401 are completely immersed in the cooling oil and isolated from the air, even if a battery cell 401 experiences thermal runaway in an extreme case, there will be no risk of explosion.

[0024] The oil holes 8 of the oil inlet pipe 6 and the oil return pipe 7 correspond to the two ends of the gap channel 402, respectively, to ensure that the cooling oil flows directly into the inlet of the gap channel 402 after flowing out of the oil inlet pipe 6, and flows into the oil return pipe 7 from the outlet of the gap channel 402 after flowing over the surface of the battery cell 401. This achieves point-to-point coverage of the gap of the battery cell 401 by the cooling oil, maximizes the utilization of the cooling oil flow, and avoids the accumulation of heat in the gap of the battery cell 401. This is especially suitable for the thermal management of high energy density battery modules 4.

[0025] The sealed enclosure consists of a housing 1 and a cover 2. The housing 1 has an upward-facing immersion liquid cooling chamber 3. The cover 2 is used to close the immersion liquid cooling chamber 3, facilitating the installation and positioning of the battery module 4 and the filling of cooling oil, while also simplifying the maintenance process for the battery module 4 during later maintenance. Furthermore, the separate design of the cover 2 and the housing 1 allows for flexible layout of battery modules 4 of different sizes. The edge of the immersion liquid cooling chamber 3 has a sealing groove, within which a sealing ring 9 is installed. When the cover 2 is closed to the housing 1, the cover 2 compresses the sealing ring 9, causing it to deform and fill the sealing groove. This effectively prevents cooling oil leakage and, even during long-term operation or when temperature changes cause slight deformation of the housing 1 and the cover 2, the elasticity of the sealing ring 9 maintains a stable seal, improving system reliability.

[0026] The sealed chassis has an oil drain port 10 on its surface, which is connected to the immersion liquid cooling chamber 3. The oil drain port 10 allows for quick drainage and replacement of the cooling oil, avoiding the cumbersome operation of traditional immersion liquid cooling systems that require disassembling the chassis for oil changes. Furthermore, the oil drain port 10 can also be used to periodically drain oil impurities or aged oil that may have accumulated during long-term high-temperature operation, ensuring sustained and stable heat dissipation performance.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adjustable heat dissipation energy storage battery pack, comprising a sealed chassis and a battery module, wherein an immersion liquid cooling chamber is provided inside the sealed chassis, the battery module is fixedly installed in the immersion liquid cooling chamber, and cooling oil is injected into the immersion liquid cooling chamber, the cooling oil completely immersing the battery module, characterized in that: The immersion liquid cooling chamber is also equipped with an evaporator, an oil inlet pipe, and an oil return pipe. The evaporator pipe extends to the surface of the sealed casing. The evaporator can be connected to the outdoor unit of an air conditioner. The oil inlet pipe and the oil return pipe cross the immersion liquid cooling chamber. The length of the oil inlet pipe and the oil return pipe is greater than the size of the battery module. Both the oil inlet pipe and the oil return pipe extend to the surface of the sealed casing and are connected to the same oil pump. The oil inlet pipe is located at the top of the immersion liquid cooling chamber, and the oil return pipe is located at the bottom of the immersion liquid cooling chamber. The evaporator is located between the oil inlet pipe and the battery module. Several oil holes are equidistantly arranged on the surface of the oil inlet pipe and the oil return pipe. The oil inlet pipe and the oil return pipe are connected to the immersion liquid cooling chamber through the oil holes.

2. The immersion energy storage battery pack with adjustable heat dissipation energy consumption according to claim 1, characterized in that: The battery module consists of several cells connected in series or in parallel, with gap channels formed between adjacent cells, through which cooling oil can flow.

3. The immersion energy storage battery pack with adjustable heat dissipation energy consumption according to claim 2, characterized in that: The oil holes of the oil inlet pipe and the oil return pipe correspond to the two ends of the gap channel, respectively.

4. A submersible energy storage battery pack with adjustable heat dissipation energy consumption according to any one of claims 1-3, characterized in that: The sealed enclosure consists of a body and a cover. The body has an upward-facing immersion liquid cooling chamber, and the cover is used to close the immersion liquid cooling chamber.

5. The immersion energy storage battery pack with adjustable heat dissipation energy consumption according to claim 4, characterized in that: The edge of the immersion liquid cooling chamber is provided with a sealing groove, and a sealing ring is provided in the sealing groove. When the cover is closed with the body, the cover squeezes the sealing ring, causing the sealing ring to deform and fill the sealing groove.

6. An adjustable heat dissipation energy consumption immersion energy storage battery pack according to any one of claims 1-3, characterized in that: The surface of the sealed housing is provided with an oil drain port, which is connected to the immersion liquid cooling chamber.

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