Immersed liquid-cooled battery module

Abstract

The invention discloses an immersed liquid-cooled battery module, which relates to the field of thermal management of battery energy storage systems, and comprises a battery box body, and a battery and a nozzle device which are arranged in the box body, the battery array is arranged in the battery box body; the nozzle device comprises a nozzle main body; n nozzles are arranged on one side of the nozzle main body, and an inlet pipeline is arranged on the other side of the nozzle main body; the nozzle device is arranged on the inner side of the battery box body, a jet orifice of the nozzle faces a gap between two adjacent columns of batteries and is used for uniformly jetting cooling liquid into the surfaces of the batteries and the gaps of the batteries at the nozzle under the action of pressure difference, and the aperture of the nozzle is adjusted by the total flow of the gaps of the batteries and an inlet. According to the nozzle device for the immersed liquid cooling energy storage battery box, the spraying range of immersed cooling liquid can uniformly cover more battery modules, small flow resistance can be generated in the battery box, and the heat dissipation efficiency of an energy storage system is effectively enhanced.

Description

Technical Field

[0001] The present application relates to the field of thermal management of battery energy storage systems, and in particular to an immersion liquid-cooled battery module. Background Art

[0002] In recent years, with the increase in energy density of battery energy storage systems and the development of high-power operating conditions, the heat generated by energy storage systems during operation has become increasingly larger. Traditional thermal management methods such as air cooling and indirect liquid cooling are difficult to meet the energy storage system's requirements for peak temperature and temperature uniformity control, and cannot take into account the energy storage system's needs to reduce its own operating power consumption and improve its safety protection capabilities. As a result, the battery's own temperature rise is often too high and the temperature difference between batteries is too large, which seriously affects the service life and safety of the energy storage system. Compared with air cooling and indirect liquid cooling, immersion liquid cooling has the following advantages: (1) The coolant is in direct contact with the battery, with low heat transfer resistance, large heat exchange area, high heat dissipation efficiency, and good temperature uniformity; (2) The structure is simple and compact, and no additional complex heat exchange structures such as cold plates are required; (3) It can be used as a passive solution with low energy consumption, especially when using phase change fluids; (4) The coolant is non-flammable, which can effectively reduce the risk of thermal runaway while enhancing heat transfer.

[0003] However, in the field of energy storage, the use of immersion liquid cooling technology for thermal management of batteries is still in the early stages of research and development and demonstration. There are still a large number of basic scientific problems and key technical problems that need to be further resolved, such as the internal flow channel design of the battery box, module packaging, and energy storage system heat exchange operation strategies. Summary of the invention

[0004] In view of this, in order to further solve and optimize the above-mentioned problems and improve the safety performance of the energy storage system, for the flow channel design problem in the battery box of the immersion liquid-cooled energy storage technology, the present application provides an immersion liquid-cooled battery module, which can not only evenly cover more battery modules with the immersion coolant spray range, but also generate smaller flow resistance inside the battery box, thereby effectively enhancing the heat dissipation efficiency of the energy storage system, an immersion liquid-cooled energy storage battery box nozzle device.

[0005] In order to achieve the above technical objectives, this application adopts the following technical solutions: The present application provides an immersion liquid-cooled battery module, comprising a battery box and batteries and a nozzle device arranged in the box; the battery array is arranged in the battery box; The nozzle device comprises a nozzle body; one side of the nozzle body is provided with n nozzles, and the other side is provided with an inlet pipe, the inlet pipe is connected with each nozzle through the nozzle body, and the inlet pipe is used to transport the coolant; The nozzle device is arranged inside the battery box, and the spray port of the nozzle is arranged between two adjacent rows of batteries, and is used to evenly spray the coolant from the nozzle onto the battery surface and the battery gap under the action of the pressure difference. The caliber of the nozzle is determined according to the battery gap and the total inlet flow rate.

[0006] As a further improvement of the present application, the distance between two adjacent nozzles is the same as the distance between two gaps between batteries in two adjacent columns; and the calibers of the nozzles at different positions are in a functional relationship with the gaps between batteries in two adjacent columns.

[0007] As a further improvement of the present application, the caliber of the nozzles at different positions is in a functional relationship with the gap between two adjacent rows of batteries. If the calibers of the outlets of the nozzles are the same, the distribution of the flow rates at the outlets of the nozzles is:

[0008]

[0009]

[0010] Flow coefficient The fourth-order polynomial fit is:

[0011] Where: M q is the total inlet mass flow rate; M k is the mass flow rate at the kth nozzle outlet; D1 is the distance between two batteries in two adjacent rows; D2 is the distance between the 1st or nth battery in two adjacent rows and the battery box; is the flow coefficient.

[0012] As a further improvement of the present application, if the mass flow rate of each nozzle outlet is evenly distributed, the width of the nozzle diameter d j As the standard, the outlet diameter of each nozzle is:

[0013]

[0014] Where: d k is the kth nozzle outlet diameter; M j is the flow rate of nozzle No. j.

[0015] As a further improvement of the present application, the nozzle body is a rectangular structure.

[0016] As a further improvement of the present application, the nozzle is a long strip nozzle arranged along the width direction of the nozzle body.

[0017] As a further improvement of the present application, the length of the nozzle is ≥ the height of the battery; the width of the nozzle is ≤ the battery gap.

[0018] As a further improvement of the present application, n is ≥ 4 and is an even number; the 1st or nth battery and battery box in the same row are also arranged with the nozzle.

[0019] As a further improvement of the present application, the distance between two batteries in two adjacent columns is D1, and the distance between the first or nth battery in the same row and the battery box is D2, and D1<D2.

[0020] As a further improvement of the present application, the inlet pipe is located between the two middle nozzles.

[0021] Compared with the prior art, the advantages of this application are: The immersed liquid-cooled battery module provided in the present application can ensure the uniform distribution of the coolant in the battery module through the design of the nozzle device, especially the precise arrangement and caliber adjustment of the nozzle. This design avoids the problem of excessive concentration of coolant in some areas and insufficient in other areas, thereby improving the cooling efficiency of the entire battery module. The nozzle device can spray the coolant onto the surface of the battery and the gap between the batteries at a high speed, increasing the heat exchange area and rate between the coolant and the battery. This helps to quickly take away the heat generated by the battery, keep the battery at a lower operating temperature, and extend the service life of the battery. By optimizing the caliber size and arrangement of the nozzle, the flow pressure resistance of the coolant in the battery module can be reduced. This can not only improve the flow efficiency of the coolant, but also reduce energy consumption, making the entire liquid cooling system more energy-efficient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present application in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present application and are not intended to specifically limit the shapes and proportional dimensions of the components in the present application. In the drawings: Figure 1 Design structure diagram for the nozzle; Figure 2 This is a top view of an immersion liquid-cooled battery module according to an embodiment of the present application; Figure 3 This is an example application diagram of 1P52S provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] like Figure 2 and Figure 3 As shown, the present application provides an immersion liquid-cooled battery module, comprising a battery box 202 and batteries 201 and a nozzle device 100 disposed in the box; the batteries 201 are arranged in an array in the battery box 202; The nozzle device 100 includes a nozzle body 101; n nozzles 102 are arranged on one side of the nozzle body 101, and an inlet pipe 103 is arranged on the battery box 202 on the other side. The inlet pipe 103 is connected with each nozzle 102 through the nozzle body 101, and the inlet pipe 103 is used to transport coolant.

[0027] Figure 2 In the embodiment, the direction of the nozzle 102 spray port (i.e., horizontal direction) is the column, and the direction of the nozzle body 101 arrangement (i.e., vertical direction) is the row. In the case, multiple batteries 201 are arranged along the column direction and multiple batteries are arranged along the row direction to form an array arrangement. There are gaps between the batteries 201 in both directions, and the gap widths are kept consistent to facilitate the rapid flow of the coolant.

[0028] The nozzle device 100 is arranged on one side inside the battery box 202, mainly along the length direction (row direction), so that more nozzles 102 can be arranged. The spray port of the nozzle 102 is arranged toward between two adjacent columns of batteries 201, and is used to evenly spray the coolant at the nozzle 102 onto the surface of the battery 201 and the gap between the batteries 201 under the action of the pressure difference. The gap between the batteries 201 between two adjacent columns and the total inlet flow rate adjust the diameter of the nozzle 102.

[0029] exist Figure 2 In the embodiment, an outlet pipe 104 is further provided on the other side of the battery box 202 corresponding to the inlet pipe 103. The outlet pipe 104 is opposite to the inlet pipe 103 and is used to discharge the coolant.

[0030] The present application provides a design of an immersion liquid-cooled battery module, the core of which is to achieve effective cooling of the battery module through a nozzle device 100. Immersion liquid cooling technology is a technology that completely or partially immerses the battery module in a coolant and reduces the battery temperature through heat exchange between the coolant and the battery module. The purpose of the present application is to optimize the distribution and flow of the coolant through the nozzle device 100 to improve the cooling efficiency and ensure that the battery module operates within a safe operating temperature range.

[0031] In order to make the immersion coolant flow evenly in the battery module, reduce the coolant flow resistance, and make the surface temperature of each battery uniform and always keep it within a safe range, it is necessary to provide an immersion liquid-cooled energy storage battery box nozzle device. like Figure 1 and Figure 2 As shown, as the core component of the nozzle device 100, the nozzle body 101 is responsible for supporting and connecting n nozzles 102. The number and caliber of the nozzles 102 are key design parameters. The caliber of the nozzle 102 determines the injection speed and flow distribution of the coolant, and there is a specific functional relationship. The inlet pipe provides coolant input for the nozzle device 100.

[0032] The nozzle 102 points to the gap between two batteries in two adjacent columns to ensure that the coolant can be evenly sprayed onto the battery surface and the gap between the batteries. By adjusting the size of the nozzle 102, the coolant can be evenly distributed according to the gap between two adjacent columns of batteries and the size of the total inlet flow. This helps to reduce the flow pressure resistance of the energy storage battery immersion system and improve the cooling efficiency. The distance between two adjacent nozzles 102 is designed to be the same as the distance between the gaps between two batteries in two adjacent columns to ensure that the coolant can cover the entire battery module.

[0033] Through the precise design and flow regulation of the nozzle device 100, the coolant can evenly cover the battery module, improve the heat exchange efficiency, and thus effectively reduce the battery temperature. Maintaining the battery within an absolutely safe operating temperature range is an important goal of this application. By optimizing the distribution and flow of the coolant, it can be ensured that the battery module will not overheat even under long-term high-load operation, thereby improving the safety and reliability of the battery system.

[0034] The immersion liquid-cooled battery module and the nozzle device 100 provided in this application realize uniform distribution of the coolant in the battery module and efficient heat exchange by precisely controlling the nozzle aperture size and flow distribution. This not only improves the cooling efficiency of the battery, but also ensures the safety and reliability of the battery system. At the same time, the design is simple in structure, easy to implement, and has broad application prospects.

[0035] The nozzle device 100 of the present application for an immersion type liquid-cooled energy storage battery 201 box effectively cools the battery module 200 by distributing the flow rate using the nozzle 102, which can reduce the flow pressure resistance of the energy storage battery 201 immersion system, evenly distribute the immersion liquid, and increase the heat exchange between the immersion liquid and the battery module 200. The structure is simple and the battery 201 can be maintained at an absolutely safe working temperature.

[0036] The device allows the immersion coolant to pass through the main inlet channel of the battery box 202 and, under the action of the pressure difference, the coolant is evenly sprayed onto the surface of the battery 201 and the battery gap at the nozzle 102. The device can adjust the nozzle 102 aperture size according to the battery 201 gap and the total inlet flow rate to evenly distribute the immersion liquid, effectively reduce the flow resistance and enhance the heat dissipation of the battery 201, and prevent thermal runaway of the energy storage system.

[0037] By designing the flow channel structure of the immersion coolant at the entrance of the battery box 201 and reasonably designing the structure, placement and diameter of the nozzle, the heat dissipation efficiency is increased, the fluid flow resistance is reduced, and a relatively uniform circulation of liquid is achieved, so that each battery 201 in the module 200 can dissipate heat evenly, avoiding thermal runaway of the single battery 201 and the module 200 and causing losses.

[0038] Immersion liquid cooling technology itself can effectively reduce the temperature of the battery and reduce the risk of thermal runaway. The present application further improves the cooling efficiency of the battery through the precise design of the nozzle device 100, thereby enhancing the safety of the battery module. Even under high temperature or high load conditions, the battery module can maintain a stable temperature, avoiding safety accidents caused by overheating.

[0039] like Figure 1As shown, as a specific solution of the present application, the nozzle body 101 is a rectangular structure. The nozzle 102 is a long strip nozzle arranged along the width direction of the nozzle body 101, and the long strip nozzle protrudes from the nozzle body 101, and specifically has a rectangular spraying diameter. The length of the nozzle 102 is ≥ the height of the battery 201; the width of the nozzle 102 is ≤ the gap between the batteries 201.

[0040] As a preferred solution, n is ≥ 4 and is an even number. The first or nth battery 201 and battery box 202 in the same row are also arranged with nozzles 102. For example, n is 14 in the embodiment of the present application.

[0041] Among them, the nozzle 102 is designed to be long and strip-shaped, and its length is greater than or equal to the height of the battery 201, and its width is less than or equal to the gap between the batteries 201. This design ensures that the coolant can fully cover the entire height of the battery and can adapt to the width of the battery gap, thereby achieving efficient coolant distribution. The number of nozzles n ≥ 4 and is an even number, which ensures the uniform distribution of the coolant in the battery module. At the same time, a nozzle 102 is also arranged between the 1st or nth battery 201 and the battery box 202 in the same row, which further enhances the coverage of the coolant to the entire battery module.

[0042] More specifically, the inlet pipe 103 is located between the two middle nozzles 102. The inlet pipe 103 is located between the two middle nozzles 102. This design helps to reduce the flow resistance of the coolant in the pipe and improve the stability and accuracy of flow control. Through reasonable nozzle arrangement and size design, it can ensure that the outlet flow of each nozzle 102 is relatively uniform, thereby avoiding the problem of local overheating or insufficient cooling.

[0043] As an example, the long strip nozzle 102 can form a continuous coolant spray belt. This spraying method helps to increase the contact area between the coolant and the battery surface and improve the heat dissipation effect. The width of the nozzle 102 is designed to be less than or equal to the battery gap, which allows the coolant to fully penetrate into the gap between the batteries, further improving the heat dissipation efficiency. The nozzle body 101 is a rectangular structure. This design makes the overall structure of the nozzle device 100 compact and easy to install and fix in the battery box. Since the number of nozzles n is an even number and can be flexibly adjusted, it can be customized according to the size and shape of the actual battery module, which improves the flexibility and applicability of the design.

[0044] In the above solution, the design of the nozzle device 100 is relatively simple and easy to install and maintain. At the same time, since the number and diameter of the nozzles 102 can be adjusted according to actual needs, the design also has certain scalability. When the number of batteries needs to be increased or decreased, the configuration of the nozzle device 100 can be adjusted accordingly to meet different application requirements.

[0045] As a specific improvement, the flow channel design method of the immersion liquid-cooled battery module 200 can design the size of the nozzle 102 according to the gap between two adjacent columns of batteries 201 and the size of the total inlet flow, so as to achieve uniform distribution of the immersion coolant flow. Specifically, the distance between two adjacent nozzles 102 is the distance between the gaps between two batteries 201 in two adjacent columns; and the size of the nozzle 102 at different positions is a function of the size of the gap between two adjacent columns of batteries 201.

[0046] As a preferred solution, the functional relationship between the nozzle diameter and the gap satisfies: the nozzle diameter size at different positions is in a functional relationship with the gap size between two adjacent rows of batteries. This means that as the battery gap changes, the nozzle diameter will also be adjusted accordingly to maintain uniform distribution of the coolant.

[0047] By optimizing the distribution and flow of coolant, the reliability of the entire liquid cooling system can be improved. This helps ensure the stability and consistency of the battery modules during long-term operation, thereby improving the reliability and performance of the entire battery energy storage system.

[0048] like Figure 1 and Figure 3 As shown, the present application provides a battery box nozzle device 100, which modifies the size of the nozzle 102 outlet flow rate according to the nozzle 102 diameter and the size of the gap between two adjacent rows of batteries 201. The immersion coolant flow rate of the energy storage battery 201 is calculated by controlling the immersion liquid inlet flow rate:

[0049] Where: M q is the mass flow rate of the coolant, kg / s; D is the inner diameter of the inlet pipe 103, m; is the density of the immersion coolant, kg / m³; v is the inlet velocity of the immersion liquid, m / s; When the device is immersed in liquid-cooled energy storage battery module 200, one nozzle 102 is designed between the gaps between two batteries 201 in two adjacent rows, with a total of n (n≥4, an even number) outlet nozzles 102, and the inlet pipe 103 is located between the two middle nozzles 102. In order to evenly distribute the flow of each nozzle 102, the size of the caliber of the nozzle 102 at different positions is improved according to the size of the gap between two adjacent rows of batteries 201. If the outlet calibers of each nozzle 102 are the same, the distribution of the outlet flow of each nozzle 102 is:

[0050]

[0051]

[0052] Flow coefficient The fourth-order polynomial fit is:

[0053] Where: M q is the total inlet mass flow rate, kg / s; M k is the mass flow rate at the outlet of the kth nozzle 102, kg / s; D1 is the distance between two batteries 201 in two adjacent columns, m; D2 is the distance between the first or nth battery 201 and the battery box 202 in the same row, m; is the flow coefficient.

[0054] In the above scheme, the flow distribution of the nozzle 102 is carefully considered and optimized based on the design of the immersion liquid-cooled energy storage battery module 200. By adjusting the diameter of the nozzle 102 at different positions and using the flow coefficient The 4th-order polynomial fitting is used to achieve uniform distribution of the flow of each nozzle 102. This design ensures that the coolant can evenly cover the entire battery module, avoiding the problem of local overheating or insufficient cooling. The cooling efficiency is improved, the service life of the battery is extended, and the safety risks caused by uneven temperature are reduced.

[0055] Furthermore, using the flow coefficient The 4th-order polynomial fitting can accurately calculate the flow rate of each nozzle 102. This precise control helps to achieve more efficient heat exchange, thereby further improving the cooling effect and improving the reliability and stability of the system, so that the battery module can maintain a stable temperature under various working conditions.

[0056] As an example, the design can adjust the caliber of the nozzle 102 according to the gap between two adjacent columns of batteries 201, so it has strong adaptability. Whether the size, shape or arrangement of the battery module changes, it can be adapted by adjusting the parameters of the nozzle 102. This allows the design to be widely used in different types of battery modules and energy storage systems, improving its market adaptability and competitiveness.

[0057] Although the design involves multiple nozzles 102 and complex flow distribution calculations, the diameter and flow coefficient of each nozzle 102 are obtained based on simple geometric parameters and polynomial fitting, and are therefore easy to optimize and adjust.

[0058] As a further improvement, the distance between two batteries in two adjacent columns is D1, and the distance between the first or nth battery in the same row and the battery box is D2, and D1<D2.

[0059] The arrangement and connection of the nozzle 102 is relatively simple, making it easy to maintain and replace when necessary. This reduces the maintenance cost and time of the system and improves its availability and reliability. Through precise flow control and uniform coolant distribution, this design not only improves the cooling efficiency and service life of the battery, but also reduces the energy consumption and failure rate of the system.

[0060] If the mass flow rate at the outlet of each nozzle 102 is evenly distributed, the width of the nozzle 102 of No. j is d j As standard, ， Then the outlet diameter of each nozzle 102 is:

[0061]

[0062] Where: d k is the outlet diameter of the kth nozzle 102, m; M j is the flow rate of nozzle 102 No. j, kg / s.

[0063] In the above scheme, if the mass flow rate at the outlet of each nozzle 102 is evenly distributed, and the caliber width dj of the nozzle 102 No. j is used as the standard to adjust the calibers of other nozzles, the outlet caliber of each nozzle 102 is adjusted to be proportional to the flow rate of the nozzle 102 No. j, thereby ensuring that the mass flow rate at the outlet of each nozzle 102 is evenly distributed. This design can significantly reduce the problem of local overheating or insufficient cooling caused by uneven flow, and improve the cooling efficiency and temperature uniformity of the entire battery module.

[0064] Based on the caliber and flow rate of nozzle No. J 102, the calibers of other nozzles are adjusted according to the flow rate ratio. This design simplifies the complexity of the flow control system, because it only needs to ensure the accuracy of the flow rate of nozzle No. J, and the flow rates of other nozzles will naturally be evenly distributed. This reduces the control difficulty and cost of the system and improves the reliability and stability of the system.

[0065] Since the flow of each nozzle 102 is evenly distributed, the efficiency of coolant use is improved. The problem of coolant waste or shortage caused by uneven flow is avoided. The utilization rate of coolant is improved, and the energy consumption and operating cost of the system are reduced. This design can flexibly adjust the flow and caliber of the No. J nozzle 102 according to the needs of actual application, so as to adapt to the needs of different battery modules and energy storage systems. The adaptability and flexibility of the system are improved, so that it can be widely used in different types of battery energy storage systems.

[0066] Furthermore, the adjustment of the caliber of the nozzle 102 is relatively simple, and does not require complicated calculation and debugging processes. When the nozzle needs to be maintained or replaced, it is only necessary to adjust the caliber of the new nozzle according to the flow ratio. When the number of nozzles needs to be increased or decreased, it is only necessary to adjust the caliber of the nozzle according to the new flow distribution requirements. This reduces the maintenance cost and expansion difficulty of the system, and improves its availability and reliability.

[0067] If the mass flow rate at the outlet of each nozzle 102 is evenly distributed and the width of the nozzle 102 is j, j The diameter of other nozzles is adjusted as the standard. This design has significant advantages such as improved flow uniformity, simplified flow control, optimized coolant usage, enhanced system adaptability, and easy maintenance and expansion.

[0068] Example Combination Figures 1 to 3 When the device is used for 1P52S immersion liquid-cooled energy storage battery module 200, the inlet pipe diameter is designed to be D=30mm, and the immersion liquid is electronic fluoride liquid HFE7100, whose density =2118kg / m³, flow rate v=0.2m / s. Then the immersion coolant flow rate of energy storage battery 201 is:

[0069] One nozzle 102 is designed between each gap between two batteries 201 in two adjacent rows, for a total of 14 nozzles 102. Figure 2 As shown. The inlet pipe 103 is located between the 7th and 8th nozzles 102. If the outlet diameters of the nozzles 102 are the same, the distance D1 between two batteries 201 in two adjacent columns is 10 mm, the distance D2 between the 1st or 13th battery 201 and the battery box 202 in the same row is 50 mm, and the inlet flow rate is 0.2 m / s. Then the flow coefficient is:

[0070] Similarly, ; ; 0.4186; 0.3921;

[0071] Then the distribution of the outlet flow of each nozzle 102 is:

[0072] Similarly, ; ; ; ; ; but:

[0073] If the mass flow rate at the outlet of each nozzle 102 is evenly distributed, taking the width d1 of the diameter of the nozzle 102 of No. 1 as 5 mm as the standard, the outlet diameter of each nozzle 102 is:

[0074] Similarly,

[0075] .

[0076] The immersion liquid-cooled battery module provided in this application has significant advantages such as uniform distribution of cooling liquid, high cooling efficiency, low flow pressure resistance, strong safety, easy maintenance and expansion, and high system reliability. These advantages make the invention have broad application prospects and important practical value in the field of battery energy storage.

[0077] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0078] The above content is a further detailed description of the present application. It cannot be determined that the specific implementation methods of the present application are limited to these. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be deemed to belong to the scope of protection determined by the submitted claims of the present application.

Claims

1. An immersion liquid-cooled battery module, characterized in that: It comprises a battery box and a battery and a nozzle device arranged in the box; the battery array is arranged in the battery box; The nozzle device comprises a nozzle body; one side of the nozzle body is provided with n nozzles, and the other side is provided with an inlet pipe, the inlet pipe is connected with each nozzle through the nozzle body, and the inlet pipe is used to transport the coolant; The nozzle device is arranged inside the battery box, and the spray port of the nozzle is arranged between two adjacent rows of batteries, and is used to evenly spray the coolant from the nozzle onto the battery surface and the battery gap under the action of the pressure difference. The caliber of the nozzle is determined according to the battery gap and the total inlet flow rate.

2. The immersion liquid-cooled battery module according to claim 1, characterized in that: The distance between two adjacent nozzles is the same as the distance between two gaps between two adjacent rows of batteries; and the calibers of the nozzles at different positions are in a functional relationship with the gaps between two adjacent rows of batteries.

3. The immersion liquid-cooled battery module according to claim 2, characterized in that: The calibers of the nozzles at different positions are in a functional relationship with the gap between two adjacent rows of batteries. If the calibers of the outlets of the nozzles are the same, the distribution of the flow rates at the outlets of the nozzles is: Flow coefficient The fourth-order polynomial fit is: Where: M q is the total inlet mass flow rate; M k is the mass flow rate at the kth nozzle outlet; D1 is the distance between two batteries in two adjacent rows; D2 is the distance between the 1st or nth battery and the battery box; is the flow coefficient.

4. The immersion liquid-cooled battery module according to claim 1, characterized in that: If the mass flow rate of each nozzle outlet is evenly distributed, the width of nozzle No. j is d j As the standard, the outlet diameter of each nozzle is: Among them, d k is the kth nozzle outlet diameter; M j is the flow rate of nozzle No. j.

5. The immersion liquid-cooled battery module according to claim 1, characterized in that: The nozzle body is a rectangular structure.

6. The immersion liquid-cooled battery module according to claim 1, characterized in that: The nozzle is a long strip nozzle arranged along the width direction of the nozzle body.

7. The immersion liquid-cooled battery module according to claim 1, characterized in that: The length of the nozzle is ≥ the height of the battery; the width of the nozzle is ≤ the battery gap.

8. The immersion liquid-cooled battery module according to claim 1, characterized in that: The n is ≥ 4 and is an even number; the 1st or nth battery and battery box in the same row are also arranged with the nozzle.

9. The immersion liquid-cooled battery module according to claim 1, characterized in that: The distance between two batteries in two adjacent columns is D1, and the distance between the first or nth battery in the same row and the battery box is D2, and D1<D2.

10. The immersion liquid-cooled battery module according to claim 1, characterized in that: The inlet pipe is located between the two middle nozzles.

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