Immersed cooling battery pack

Abstract

The utility model belongs to the technical field of battery packs, and particularly relates to an immersed cooling battery pack which comprises a battery pack body, the battery pack body comprises an upper shell, a lower shell, a battery module, a BMS (Battery Management System) and an electrical part arranged on the outer side of the lower shell, an extension shell is arranged on the front side of the lower shell, a liquid inlet is formed in the upper part of the extension shell, and a liquid outlet is formed in the lower part of the extension shell. Supporting beams for supporting the battery module are arranged in the lower shell and are higher than the inner side surface of the lower shell, exhaust channels distributed and designed in a # shape are arranged between the two supporting beams, and the exhaust channels comprise longitudinal channels distributed longitudinally and transverse channels distributed perpendicular to the longitudinal channels; a through hole is formed in the transverse channel, and a sealing gasket is arranged on the through hole. The heat dissipation device is reasonable in design, simple in structure and convenient to process, the heat dissipation efficiency of the battery can be greatly improved, and a powerful guarantee is provided for long-time and high-quality endurance of the battery.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery pack technical field especially relates to a kind of immersion cooling battery pack. BACKGROUND

[0002] At present, energy conservation and environmental protection has become the main theme of manufacturing development, and electric drive has become an important development direction of engineering machinery industry. With the popularization and application of solar energy, wind energy and other new energy, energy storage technology has also developed, and lithium battery gradually becomes the mainstream product of energy storage because of the advantages of relatively high energy, long service life, high rated voltage, high power bearing, low self-discharge rate, light weight, green environmental protection and basically no water consumption in production.

[0003] With the development of battery pack industry, more and more users pay special attention to the endurance and quality of battery;However, in order to ensure the long endurance and high quality operation of battery pack, cooling of battery pack is essential;At present, the cooling form of battery mainly includes two kinds: liquid cooling and air cooling, wherein the air cooling technology has slow heat dissipation efficiency and is affected by environmental factors, the liquid cooling temperature control effect is good, and the cell temperature consistency is high, but with the development of energy storage battery pack, the existing liquid cooling technology has high precision requirement when welding liquid cooling plate, high mold cost, low popularization cost performance, and the glue coating performance is difficult to control when combining module and cooling plate, so that the module is not uniform when cooled, therefore, the present application provides an immersion cooling battery pack with reasonable design, simple structure, easy processing and high battery heat dissipation efficiency, which provides strong guarantee for long time and high quality endurance of battery. UTILITY MODEL CONTENTS

[0004] The utility model discloses to the technical problem existing in the above battery pack cooling process, propose a kind of immersion cooling battery pack with reasonable design, simple structure, easy processing and high battery heat dissipation efficiency, which provides strong guarantee for long time and high quality endurance of battery.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme for a kind of immersion cooling battery pack, including battery pack body, the battery pack body includes upper shell, lower shell, battery module, BMS system and electrical component set up in the outside of lower shell, characterized by, the front side of the lower shell is provided with extension shell, the upper of the extension shell is provided with liquid inlet, the support beam that supports the battery module is provided in the lower shell, and the inner side of the lower shell is higher, the exhaust passage of the design of the shape of well is arranged between two support beams, the exhaust passage includes the longitudinal channel of the longitudinal arrangement and the transverse channel perpendicular to it, the transverse channel is provided with through-hole, and the sealing pad is arranged on the through-hole.

[0006] As preferred, the lower two sides of the lower shell are designed in a tapered shape, and a liquid outlet is arranged above one side of the lower shell, and the liquid outlet is provided with a water and gas dual-purpose pump.

[0007] As preferred, a sensor is arranged above the inner side of the lower shell, and a sealing strip is arranged between the upper shell and the lower shell.

[0008] As preferred, the battery module comprises left and right end plates, and a plurality of battery cells are arranged between the two end plates, and an explosion-proof valve is arranged below the battery cells and is matched with the through hole, and a core column is arranged below the battery cells on both sides of the explosion-proof valve.

[0009] Compared with the prior art, the utility model has the advantages and positive effects that,

[0010] The immersion cooling battery pack has the advantages that the suspension type structure is used for the cooling scheme, the bottom is suspended and can store water for cooling, the cooling liquid is immersed and flows from bottom to top for cooling, the cooling efficiency of the immersion cooling is greatly improved, when the battery cell is in thermal runaway, the cooling oil in the cooling system is prevented from being polluted by using the exhaust channel, the device is convenient to install and has strong use function, the labor intensity is effectively reduced, and the practicability is improved, the device has reasonable design, simple structure, convenient processing, and can greatly improve the battery heat dissipation efficiency, and provides strong guarantee for long-time and high-quality battery endurance. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the drawings without creative labor.

[0012] Fig. 1 It is a structure schematic view of the immersion cooling battery pack.

[0013] Fig. 2 It is a structure side view of the immersion cooling battery pack.

[0014] Fig. 3 It is an explosion schematic view of the structure of the immersion cooling battery pack.

[0015] Fig. 4 It is a part of the internal structure of the immersion cooling battery pack.

[0016] In the above figures, 1, upper shell; 2, lower shell; 21, extension shell; 3, battery module; 31, end plate; 32, battery cell; 321, explosion-proof valve; 322, stem; 4, BMS system; 5, electrical component; 6, liquid inlet; 7, support beam; 8, exhaust passage; 81, longitudinal passage; 82, transverse passage; 821, through hole; 822, sealing gasket; 9, liquid outlet; 10, water-air pump; 11, sensor; 12, sealing strip. DETAILED DESCRIPTION

[0017] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0018] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0019] Embodiments, such as Figs. 1-4As shown, an immersion cooling battery pack includes a battery pack body, the battery pack body includes an upper shell 1, a lower shell 2, a battery module 3, a BMS system 4 and an electrical component 5 arranged outside the lower shell 2, wherein the arrangement of each device component is a mature conventional technology, and specific details will not be repeated, the embodiment aims to solve the problem of low liquid cooling efficiency of the existing battery pack, specifically: the front side of the lower shell 2 is provided with an extension shell 21, and the upper side of the extension shell 21 is provided with a liquid inlet 6, wherein for the arrangement of the extension shell 21, the design makes the front section of the shell protrude a flow channel cavity, and is combined with the liquid inlet 6, at this time, when the cooling medium flows in, the liquid column is perpendicular to the bottom surface of the cavity, the purpose is to slow down the water flow impact, make the cooling liquid in the battery pack flow more evenly, and at the same time, improve the uniformity of heat dissipation of each battery cell 32; The lower shell 2 is provided with a support beam 7 for supporting the battery module 3, and is higher than the inner side of the lower shell 2, the support beam 7 supports the battery module 3, and the module end plate 31 is fixed on the support beam 7 during installation of the battery module 3, at this time, it should be noted that in the present embodiment, the battery module 3 is assembled with the bottom surface of the battery cell 32 facing the positive direction of the Z axis, the explosion-proof valve 321 of the battery cell 32 faces the negative direction of the Z axis, and the explosion-proof valve 321 on the battery cell 32 should be tightly matched with the sealing gasket 822 on the exhaust passage 8 during installation of the battery module 3, so as to form a sealed whole with the explosion-proof valve 321 of the battery cell 32 and the exhaust passage 8, the exhaust passage 8 arranged in a cross shape is arranged between the two support beams 7, of course, at this time, the distance between the support beam 7 and the exhaust passage 8 and the bottom of the box is still very large, preventing the suspension structure, that is, the combination of the support beam 7 and the exhaust passage 8 from blocking the horizontal flow of the liquid, the reason for leaving a certain distance between the above-mentioned suspension structure and the bottom of the lower shell 2 is not only to prevent the flow of the cooling liquid, but also the most important feature is to allow each battery cell 32 to be cooled uniformly at the same time, at this time, the battery pack is like a reservoir, and the cooling medium slowly rises from the bottom, so that each battery cell 32 can uniformly contact the fresh cooling medium in the first time, if the battery cell 32 is directly placed at the bottom as in the existing traditional design scheme, the battery cell 32 close to the liquid inlet 6 will be cooled preferentially, and by analogy, the cooling liquid will carry the heat of the first N battery cells 32 to the last battery cell 32, which will greatly reduce the balance between the battery cells 32;The exhaust channel 8 includes a longitudinal channel 81 arranged vertically and a transverse channel 82 arranged perpendicularly to it. Both ends of the longitudinal channel 81 extend to the outer side of the lower housing 2, and its outer end face is flush with the outer periphery of the lower housing 2 to ensure aesthetics. The transverse channel 82 has through holes 821, and sealing gaskets 822 are installed on the through holes 821. The longitudinal channel 81 and the transverse channel 82 are integrally formed, with a hollow internal design. The two sides of the exhaust channel 8 (i.e., the two ends of the transverse channel 82) are sealed and connected to the support beam 7. The explosion-proof valve 321 of the battery module 3 is located at the through hole 821, ensuring smooth "breathing" of the battery cell 32 during immersion cooling without affecting the pressure inside the battery pack, thus ensuring the safety of the equipment structure.

[0020] In the above process: a suspension-type cooling scheme is adopted, with its bottom suspended for water storage and cooling, allowing the coolant to flow from bottom to top in an immersion cooling manner, which greatly improves the cooling efficiency of immersion cooling. In addition, the exhaust channel 8 is used to prevent the cooling oil in the cooling system from being contaminated when the battery cell 32 experiences thermal runaway. The device is easy to install, highly functional, effectively reduces labor intensity, and improves practicality. This device is reasonably designed, simple in structure, easy to process, and can greatly improve the battery heat dissipation efficiency, providing a strong guarantee for the battery's long-term, high-quality range.

[0021] To ensure effective input and flow of the cooling medium within the battery pack, the lower housing 2 has a conical design on both sides. This design aims to reduce the space required for storing cooling oil, allowing the bottom to fill with coolant more quickly, thereby improving cooling efficiency. It also reduces the amount of cooling oil used in the battery pack, facilitating cooling system circulation. An outlet 9 is located on the upper side of one side of the lower housing 2, and a water-air dual-purpose pump 10 is installed at the outlet 9. The inlet 6 is at a lower position, and the outlet 9 is at a higher position. This allows the cooling medium to be immersed in the lower housing 2 from bottom to top, ensuring effective cooling. The water-air dual-purpose pump 10 controls and adjusts the flow rate of the cooling medium to meet different usage requirements.

[0022] In order to further enhance the use of device functionality, the inner side of the lower shell 2 is provided with a sensor 11, the upper shell 1 and the lower shell 2 are provided with a sealing strip 12, the sealing strip 12 is set up to ensure the cooperation between the upper shell 1 and the lower shell 2, and the use effect of the battery pack is guaranteed. Further, for the sensor 11, a plurality of sensors 11 can be set up, and liquid level sensors 11 or temperature sensors 11 can be selected according to the use functionality. That is, the cooling medium flows into the high port from the low port, and the purpose is to ensure that the entire module can be completely immersed. Of course, the liquid outlet 9 is higher than the upper surface of the module, and the sensors 11 are arranged at the four corners of the battery pack. When the temperature sensor 11 is used to collect the temperature in the device, if the collected temperature is higher than the preset temperature, or when the liquid level sensor 11 is used, if it does not identify the immersion, the sensor 11 will send a command to the external control system, and the external control system will start the water-electric dual-purpose pump to increase the flow rate of the cooling oil, so as to faster heat dissipation, thereby improving the cooling efficiency. It needs to be further explained that the upper surface of the sensor 11 is flush with the upper surface of the module, so as to ensure the smooth progress of the detection work.

[0023] In order to improve the rationality of the device, the use safety is guaranteed, the battery module 3 includes left and right end plates 31, and the two end plates 31 are provided with battery cells 32. The explosion-proof valve 321 is arranged below the battery cell 32 and corresponds to the through hole 821. The core column 322 is arranged below the battery cell 32 on both sides of the explosion-proof valve 321. The cooperation between the explosion-proof valve 321 and the through hole 821 is realized by the sealing gasket 822 to realize the tight cooperation between the equipment components, so that the battery cell 32 and the exhaust passage 8 form a sealed whole. When the battery cell 32 is out of control, it will be discharged outside the battery pack along the exhaust passage 8 through the explosion-proof valve 321, so that other substances will not pollute the cooling system of the whole battery pack.

[0024] The above is only a preferred embodiment of the present application, and is not limited to other forms. Any skilled person in the art can modify or change the above disclosed technology content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belongs to the protection scope of the present application.

Claims

1. An immersion-cooled battery pack, comprising a battery pack body, the battery pack body including an upper shell, a lower shell, a battery module, a BMS system, and electrical components disposed on the outside of the lower shell, characterized in that, An extension shell is provided on the front side of the lower housing, and a liquid inlet is provided above the extension shell. A support beam is provided inside the lower housing to support the battery module and is higher than the inner side of the lower housing. An exhaust channel with a grid-shaped arrangement is provided between the two support beams. The exhaust channel includes a longitudinal channel arranged in the longitudinal direction and a transverse channel arranged perpendicular to it. A through hole is opened on the transverse channel and a sealing gasket is provided on the through hole.

2. The immersion-cooled battery pack according to claim 1, characterized in that, The lower housing has a tapered design on both sides below, and a liquid outlet is provided on the upper side of one side of the lower housing. The liquid outlet is equipped with a water-air dual-purpose pump.

3. The immersion-cooled battery pack according to claim 2, characterized in that, A sensor is provided on the upper inner side of the lower housing, and a sealing strip is provided between the upper housing and the lower housing.

4. The immersion-cooled battery pack according to claim 3, characterized in that, The battery module includes left and right end plates, with a battery cell between the two end plates. An explosion-proof valve is located below the battery cell and corresponds to a through hole. Core posts are located below the battery cells on both sides of the explosion-proof valve.

Images