Safe temperature control type immersed battery pack module

Abstract

The invention relates to a safe temperature control type immersed battery pack module, which comprises a shell, a plurality of battery modules are arranged in the shell, the shell comprises a top cover and a shell main body, the top cover is detachably and fixedly connected with the shell main body, the shell main body encloses to form an inner cavity, and the inner cavity is provided with a plurality of battery modules. The inner cavity is used for accommodating cooling liquid to immerse the battery module; a liquid cooling pipeline is arranged in the shell main body, the liquid cooling pipeline is arranged around the peripheries of the battery modules, and the liquid cooling pipeline is communicated with a water inlet and a water outlet and is used for performing heat exchange with the cooling liquid through a pipe wall. The LED lamp has the advantages of being high in heat dissipation efficiency, good in temperature uniformity and high in safety and reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, in particular to a safe temperature control type immersion battery module. BACKGROUND

[0002] With the rapid development of new energy industry, battery packs are widely used in electric vehicles, energy storage systems and other fields. As the core energy storage unit, the thermal management level directly determines the performance, safety and service life of the whole system. During the charging and discharging process of the battery, heat will be continuously generated, if it cannot be timely and evenly discharged, it will lead to the increase of the internal temperature of the battery pack, the excessive temperature difference, and further cause performance degradation, service life shortening, and even trigger thermal runaway in extreme cases, causing serious safety accidents.

[0003] In the prior art, battery thermal management mainly adopts air cooling and liquid cooling two kinds of schemes. Among them, the air cooling system is limited by the heat conduction performance of air, and the heat dissipation efficiency is low, which is difficult to meet the heat dissipation demand of high power density battery pack. Although part of the liquid cooling scheme adopts cooling pipeline, there are still the following problems: the pipeline layout form is single, which leads to uneven heat dissipation of different parts of the battery module, and the internal temperature difference is significant; the heat exchange between the battery module and the battery module is not sufficient, and the heat dissipation efficiency needs to be improved; at the same time, there is lack of effective monitoring means for the liquid level of the cooling liquid, and once leakage occurs, it will lead to heat dissipation failure, and further cause battery pack overheating, service life attenuation and even safety hazards. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a safe temperature control type immersion battery module, which has the effects of high heat dissipation efficiency, good temperature uniformity and strong safety and reliability.

[0005] The above invention purpose of the present application is realized by the following technical scheme:

[0006] A safe temperature control type immersion battery module, comprising a shell, a plurality of battery modules are arranged in the shell,

[0007] The shell comprises a top cover and a shell body, the top cover and the shell body are detachably fixedly connected, the shell body encloses to form an inner cavity, and the inner cavity is used for containing cooling liquid to immerse the battery module;

[0008] The shell body is provided with a liquid cooling pipeline, the liquid cooling pipeline is composed of a plurality of sub-liquid cooling pipes and connecting heads, and is arranged in the space between the inner wall of the shell body and the outer periphery of the battery module, and the liquid cooling pipeline is communicated with a water inlet and a water outlet for heat exchange with the cooling liquid through the pipe wall.

[0009] The above technical solution achieves efficient synergy between "immersion temperature equalization" and "active liquid cooling circulation". The liquid cooling pipeline adopts a modular design and a surrounding layout. The heat generated by the battery module is quickly and evenly absorbed by the internal coolant and is eventually carried away continuously through the liquid cooling pipeline system, thereby achieving both high safety and high-precision temperature control of the battery pack.

[0010] As a further technical solution of the present invention: the water inlet and the water outlet are spaced apart on the same side of the outer shell body, and the water inlet and the water outlet respectively penetrate the outer shell body and are connected to both ends of the liquid cooling pipeline.

[0011] By concentrating the inlet and outlet on the same side of the casing using the above technical solution, the pipeline layout is simplified, allowing the coolant to circulate in an orderly manner within the pipeline, thus improving heat exchange efficiency. At the same time, the centralized arrangement on the same side reduces the number of openings in the main body of the casing, thereby reducing the risk of leakage.

[0012] As a further technical solution of the present invention: the sub-liquid cooling pipe includes a serpentine pipe, the serpentine pipe including a straight pipe section and an elbow connecting the straight pipe section.

[0013] By introducing a serpentine tube into the liquid cooling pipeline through the above technical solution, the combination of its straight pipe section and elbow can increase the total length of the pipeline and the contact area with the coolant, so that the heat exchange between the liquid cooling pipeline and the coolant is more complete, and the temperature control effect of the battery module is effectively improved.

[0014] As a further technical solution of the present invention: the straight pipe sections are distributed at equal intervals.

[0015] The above technical solution ensures that the straight sections of the serpentine tube are evenly spaced, thus ensuring uniform heat flow density along the heat dissipation surface of the battery module. This effectively avoids local overheating caused by uneven heat dissipation and improves the consistency of the battery pack's operating temperature.

[0016] As a further technical solution of the present invention: a liquid level gauge is also provided, which is installed on the outer casing body.

[0017] Through the above technical solution, the liquid level gauge can monitor the liquid level of the coolant in the sealed cavity in real time, and can detect and warn of liquid level drop caused by leakage in a timely manner, providing an active safety monitoring means for the system and further enhancing the overall safety of the battery module.

[0018] In summary, the present invention has at least one of the following beneficial technical effects:

[0019] 1. This invention discloses a safe temperature-controlled immersion battery module, which achieves high safety and high-precision temperature control of the battery module through a collaborative design of "rapid and uniform absorption of heat from the battery module by immersion coolant + continuous heat removal by liquid cooling pipes".

[0020] 2. This invention discloses a safe temperature-controlled immersion battery module, which, through the structural design of serpentine tube liquid cooling pipes (straight pipe sections distributed at equal intervals), increases the heat exchange area, ensures uniform heat dissipation, and effectively improves the temperature control effect and consistency of the battery pack with the operating temperature.

[0021] 3. This invention discloses a safe temperature-controlled immersion battery module, which monitors the coolant level in the inner cavity of the outer casing in real time through a level gauge, enabling timely warning of coolant leakage risks and further enhancing the overall safety of the battery module. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a safety temperature-controlled immersion battery module according to a first embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0024] Figure 3 for Figure 1 Top view.

[0025] Figure 4 for Figure 1 Side view reference numerals: 1. Housing; 11. Top cover; 12. Main body of the housing; 2. Battery module; 3. Coolant; 4. Liquid cooling pipeline; 41. Sub-liquid cooling pipe; 411. Serpentine pipe; 4111. Straight pipe section; 4112. Elbow; 42. Connector; 5. Water inlet; 6. Water outlet; 7. Level gauge. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Example 1:

[0030] Reference Figure 1 The present invention discloses a safe temperature-controlled immersion battery module, including a housing 1. The housing 1 contains a battery pack composed of four battery modules 2 spliced ​​together, containing a total of fifty-two batteries. The housing 1 is composed of a top cover 11 and an outer shell body 12. The top cover 11 and the outer shell body 12 are detachably fixed by bolt thread connection, and a sealing gasket is provided between the two to ensure the sealing of the inner cavity. The inner cavity formed by the outer shell body 12 is used to contain coolant 3, and the coolant 3 is used to immerse the battery modules 2.

[0031] Reference Figure 2 The outer casing 12 is equipped with a liquid cooling pipe 4 made of a high thermal conductivity material, such as aluminum, copper alloy, or copper-nickel alloy. The liquid cooling pipe 4 is filled with circulating coolant (such as pure water or ethylene glycol solution) and surrounds the periphery of the four battery modules 2. The two ends of the liquid cooling pipe 4 are respectively connected to an inlet 5 and an outlet 6. The circulating coolant exchanges heat efficiently with the coolant 3 in the inner cavity of the outer casing 12 through the pipe wall. The inlet 5 and outlet 6 are spaced apart and symmetrically arranged on the same side of the outer casing 12. They both penetrate the side wall of the outer casing 12 and are sealed to the two ends of the liquid cooling pipe 4.

[0032] Reference Figure 2 and Figure 3The liquid cooling pipeline 4 is composed of multiple segments of liquid cooling pipe 41 and sealed connector 42 connected end to end. It is located near the inner walls of the three sides of the outer casing 12 and is set at a preset distance from the inner walls to form a continuous flow pipeline around the battery module 2. The liquid cooling pipeline 4 is not arranged on the side of the outer casing 12 where the electrical interface is integrated, so as to avoid the electrical connection structure and wiring terminals of the battery module 2.

[0033] The portion of the sub-liquid cooling pipe 41 corresponding to the area with higher heat dissipation requirements of battery module 2 is designed as a serpentine pipe 411, as shown in the reference. Figure 4 The serpentine tube 411 is located on opposite sides of the battery pack. It is integrally formed by parallel straight pipe sections 4111 and arc-transitioned elbows 4112. All straight pipe sections 4111 are evenly distributed along the length of the battery module 2 to ensure uniform heat exchange along the surface of the battery module 2.

[0034] Reference Figure 1 It is also equipped with a level gauge 7, which is installed on the side wall of the outer shell 12 by means of threaded connection. Its detection end extends into the inner cavity and can monitor the level of coolant 3 in real time. In order to further improve the timeliness and reliability of safety monitoring, when the level drops to a preset threshold due to leakage, evaporation, etc., the level gauge 7 transmits an electrical signal to the control system to trigger an early warning, thereby enhancing the safety of the battery module.

[0035] During the operation of the battery module, its thermal management process is as follows: First, during the assembly stage, insulating and thermally conductive coolant 3 is pre-injected and sealed in the inner cavity formed by the outer shell 12, so that all battery modules 2 are in an immersed state. When the battery module 2 starts to work, the heat it generates is directly transferred to the surrounding coolant 3, achieving rapid initial absorption and temperature equalization. At the same time, driven by the external cooling system, circulating coolant flows from the inlet 5 into the liquid cooling pipe 4. When the circulating coolant flows in the liquid cooling pipe 4, efficient heat exchange occurs on both sides of the pipe wall, and the higher-temperature coolant 3 transfers heat to the lower-temperature circulating coolant in the pipe. The heated circulating coolant is finally discharged through the outlet 6, enters the external radiator for cooling, and then circulates back to the inlet 5, thus forming a continuous active heat dissipation cycle that continuously removes the heat generated by the battery from the module.

[0036] The implementation principle of this invention is as follows: Based on the synergistic heat dissipation principle of "immersion temperature equalization + active liquid cooling circulation", the heat generated by the battery module 2 is first rapidly and uniformly absorbed by the coolant 3 in the inner cavity of the outer shell 12, achieving initial temperature uniformity; at the same time, the liquid cooling pipe 4 exchanges heat with the coolant 3 through the pipe wall, continuously carrying away the heat from the coolant. The multi-segment liquid cooling pipe 41 of the liquid cooling pipe 4 adopts a modular design, which can adapt to the outer periphery of the battery module 2 and shorten the heat exchange distance. The straight pipe segments 4111 and elbows 4112 of the serpentine pipe 411, as well as the equally spaced straight pipes, are also included. Section 4111 further increases the contact area between the liquid cooling pipe 4 and the coolant 3, improving the efficiency and uniformity of heat exchange; the centralized arrangement of the inlet 5 and outlet 6 on the same side of the outer shell 12 allows the circulating coolant to form an orderly circulation within the liquid cooling pipe 4, which optimizes heat exchange efficiency and reduces the risk of leakage; the level gauge 7 provides an active safety monitoring means for the system by monitoring the level of the coolant 3 in real time, avoiding heat dissipation failure caused by coolant 3 leakage. Thus, from the three aspects of heat exchange efficiency, temperature uniformity, and safety monitoring, the battery pack achieves high safety and high-precision temperature control.

[0037] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A safety temperature-controlled immersion battery module, comprising a housing (1), wherein a plurality of battery modules (2) are disposed within the housing (1), characterized in that, The housing (1) includes a top cover (11) and an outer shell body (12). The top cover (11) and the outer shell body (12) are detachably and fixedly connected. The outer shell body (12) encloses and forms an inner cavity, which is used to contain coolant (3) to immerse the battery module (2). The outer shell (12) is provided with a liquid cooling pipeline (4). The liquid cooling pipeline (4) is composed of multiple sub-liquid cooling pipes (41) and connectors (42), and is arranged around the space between the inner wall of the outer shell (12) and the outer periphery of the battery module (2). The liquid cooling pipeline (4) is connected to an inlet (5) and an outlet (6) for heat exchange with the coolant (3) through the pipe wall.

2. The safety temperature-controlled immersion battery module according to claim 1, characterized in that, The inlet (5) and the outlet (6) are spaced apart on the same side of the outer shell (12), and the inlet (5) and the outlet (6) respectively pass through the outer shell (12) and are connected to both ends of the liquid cooling pipeline (4).

3. A safety-controlled temperature-controlled immersion battery module according to claim 1, characterized in that, The sub-liquid cooling pipe (41) includes a serpentine pipe (411), which includes a straight pipe section (4111) and an elbow (4112) connecting the straight pipe section (4111).

4. A safety-controlled temperature-controlled immersion battery module according to claim 3, characterized in that, The straight pipe sections (4111) are distributed at equal intervals.

5. A safety-controlled temperature-controlled immersion battery module according to claim 1, characterized in that, A level gauge (7) is also provided, which is mounted on the outer casing (12).

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