Immersed battery cooling structure and new energy automobile

Abstract

The utility model relates to the technical field of battery cooling, in particular to an immersed battery cooling structure and a new energy automobile. The immersed battery cooling structure comprises a box body assembly, a battery cell row and a sealing bracket, the box body assembly is provided with a containing cavity and a containing opening, the box body assembly is provided with a flow dividing channel and a flow converging channel, and the flow converging channel is arranged on the side, away from the containing opening, of the containing cavity. The battery cell rows are mounted in the accommodating cavity, the plurality of battery cell rows are arranged at intervals in a first preset direction to form a battery cell group, a gap flow channel is formed between the adjacent battery cell rows in a clamping manner, and each gap flow channel is respectively communicated with the shunting channel and the confluence channel. The sealing bracket is arranged on one side, close to the accommodating opening, of the battery cell group, and is in sealing connection with the battery cell group and the box body assembly respectively so as to block one side, close to the accommodating opening, of the gap runner. According to the immersed battery cooling structure and the new energy automobile provided by the invention, the problem that an existing immersed cooling structure has a relatively large liquid leakage risk is solved.

Description

Technical Field

[0001] The present application relates to the field of battery cooling technology, and in particular to an immersion battery cooling structure and a new energy vehicle. Background Art

[0002] The endurance of new energy vehicles is still an important factor restricting the development of new energy vehicles. As a major technical means to solve the endurance problem of new energy vehicles, fast charging technology can alleviate people's anxiety about the endurance of new energy vehicles to a certain extent.

[0003] At present, with the gradual increase in fast charging rates, the heat generated by the battery cells has also increased exponentially. The traditional bottom liquid cooling method alone can no longer meet the temperature rise under fast charging conditions. Once the temperature of the battery cell is too high, it is difficult to ensure the supercharging performance of the battery cell. The immersion cooling design, that is, immersing the battery cell in insulating coolant, can effectively increase the contact area with the battery cell, thereby improving the heat dissipation capacity of the battery cell. However, most of the existing immersion cooling structures are fully immersed, which not only has poor fluidity, but also has a high risk of leakage. Utility Model Content

[0004] Based on this, it is necessary to provide an immersion battery cooling structure and a new energy vehicle to solve the problem that the existing immersion cooling structure has a large risk of leakage.

[0005] The present application provides an immersion battery cooling structure, which includes a box assembly, a battery cell row and a sealing bracket, the box assembly is provided with a accommodating cavity and a accommodating opening connected to the accommodating cavity, and the box assembly is provided with a shunt channel and a convergence channel, wherein the convergence channel is arranged on a side of the accommodating cavity away from the accommodating opening; the battery cell row is installed in the accommodating cavity through the accommodating opening, and the number of the battery cell rows is multiple, and the multiple battery cell rows are arranged at intervals along a first preset direction to form a battery cell group, and gap flow channels are sandwiched between adjacent battery cell rows, and each of the gap flow channels is respectively connected to the shunt channel and the convergence channel; the sealing bracket is arranged on a side of the battery cell group close to the accommodating opening, and is respectively sealed and connected to the battery cell group and the box assembly to block the side of the gap flow channel close to the accommodating opening.

[0006] In one embodiment, the box assembly includes a lower box, a mounting frame and a main longitudinal beam, the main longitudinal beam extends along the first preset direction and overlaps the mounting frame, and the main longitudinal beam and the mounting frame are both installed on the lower box, the main longitudinal beam, the mounting frame and the lower box are arranged to form the accommodating cavity and the accommodating opening; wherein the side wall of the main longitudinal beam is provided with the diversion channel and the liquid outlet hole connecting the diversion channel and the gap flow channel, and the lower box is provided with the converging channel and the liquid inlet hole connecting the gap flow channel and the converging channel.

[0007] In one embodiment, the diversion channel has an inlet end, and the diversion channel includes a front-end diversion channel, a rear-end diversion channel, and a first branch channel connecting the front-end diversion channel and the rear-end diversion channel. Along the first preset direction, the first branch channel and the front-end diversion channel are both arranged on the side of the rear-end diversion channel close to the inlet end, and the first branch channel is arranged independently of the front-end diversion channel.

[0008] In one embodiment, the front-end branch channel includes a second branch channel and a third branch channel, and the second branch channel and the third branch channel are symmetrically arranged relative to the center line of the first branch channel; and / or, the rear-end branch channel includes a fourth branch channel and a fifth branch channel, and the fourth branch channel and the fifth branch channel are symmetrically arranged relative to the center line of the first branch channel.

[0009] In one embodiment, the confluence channel includes a front-end confluence channel, a rear-end confluence channel and a total confluence channel, the number of the front-end confluence channels is multiple, the multiple front-end confluence channels are arranged at intervals along the first preset direction, and each of the front-end confluence channels can receive the insulating coolant flowing out through the front-end branch channel, the corresponding liquid outlet, the corresponding gap channel and the corresponding liquid inlet in sequence, and merge into the total confluence channel; the number of the rear-end confluence channels is multiple, the multiple rear-end confluence channels are arranged at intervals along the first preset direction, and each of the rear-end confluence channels can receive the insulating coolant flowing out through the rear-end branch channel, the corresponding liquid outlet, the corresponding gap channel and the corresponding liquid inlet in sequence, and merge into the total confluence channel; wherein, along the first preset direction, and from the direction close to the inlet end to the direction away from the inlet end, the flow areas of the multiple front-end confluence channels and the multiple rear-end confluence channels gradually decrease.

[0010] In one of the embodiments, each of the battery cell rows includes a plurality of battery cells, and the plurality of battery cells are arranged at intervals along a second preset direction, and the second preset direction is perpendicular to the first preset direction; the immersion battery cooling structure also includes a sealing gasket, and along the second preset direction, the sealing gasket is arranged between adjacent battery cells and is respectively sealed and connected to two adjacent battery cells, so that independent gap flow channels can be formed between adjacent battery cell rows.

[0011] In one embodiment, the immersed battery cooling structure also includes a first sealing strip, which is arranged between adjacent battery cell rows and respectively connected to two adjacent battery cell rows, and one end of the first sealing strip along the first preset direction is abutted against the main longitudinal beam, and the other end is spaced apart from the mounting frame to separate the gap flow channel into a first gap branch channel connected to the liquid outlet and a second gap branch channel connected to the liquid inlet; wherein the flow directions of the insulating coolant in the first gap branch channel and the second gap branch channel are opposite.

[0012] In one embodiment, the immersed battery cooling structure also includes a second sealing strip and a third sealing strip, wherein the second sealing strip and the third sealing strip are respectively arranged on opposite sides of the first sealing strip and spaced apart from the first sealing strip, and the second sealing strip and the third sealing strip are both connected to two adjacent battery cell rows; wherein both ends of the second sealing strip and the third sealing strip are respectively spaced apart from the main longitudinal beam and the mounting frame.

[0013] In one of the embodiments, the sealing bracket is bonded to the battery cell group and the box assembly by means of a sealant.

[0014] The present application also provides a new energy vehicle, which includes the immersion battery cooling structure described in any one of the above embodiments.

[0015] Compared with the prior art, the submerged battery cooling structure and new energy vehicle provided by the present application, by setting a gap flow channel between adjacent battery cell rows, the insulating coolant in the shunt channel can flow into the converging channel through the gap flow channel, that is, the side and bottom of the battery cell row can contact the insulating coolant, ensuring the contact area between the battery cell row and the insulating coolant, thereby greatly improving the heat dissipation efficiency of the battery cell row. In addition, by setting a sealing bracket, the gap flow channel can be sealed to prevent the insulating coolant flowing in the gap flow channel from leaking, thereby effectively improving the sealing performance of the submerged battery cooling structure, so the traditional upper cover structure can be cancelled. Since the space occupied by the outer shell is reduced, the structure of the present application can not only reduce the manufacturing cost, but also help to improve the internal energy density and improve the endurance of new energy vehicles. In addition, the present application adopts a module-free structure, which can be formed only by arranging and installing the battery cell row, further reducing the number of components and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 An exploded view of an immersion battery cooling structure according to an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a lower box body according to an embodiment of the present application;

[0019] Figure 3 An exploded view of a mounting frame according to an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a flow channel of an immersion battery cooling structure according to an embodiment of the present application;

[0021] Figure 5 A top view of a flow channel of an immersion battery cooling structure according to an embodiment of the present application;

[0022] Figure 6 A cross-sectional view of an immersion battery cooling structure according to an embodiment of the present application;

[0023] Figure 7 A cross-sectional view of a partial structure of an immersion battery cooling structure according to an embodiment of the present application;

[0024] Figure 8A schematic diagram of a partial structure of a sealing bracket according to an embodiment of the present application.

[0025] The symbols in the figure mean the following:

[0026] 100, immersion battery cooling structure; 10, box assembly; 101, accommodating cavity; 102, accommodating opening; 11, lower box; 111, confluence channel; 1111, front confluence channel; 1112, rear confluence channel; 1113, total confluence channel; 112, liquid inlet hole; 12, mounting frame; 13, main longitudinal beam; 131, diversion channel; 1311, inlet end; 1312, front diversion channel; 1312a, second branch channel; 1312b, third branch channel; 1313 , rear end branch channel; 1313a, fourth branch channel; 1313b, fifth branch channel; 1314, first branch channel; 132, liquid outlet; 20, battery cell group; 201, gap channel; 2011, first gap branch channel; 2012, second gap branch channel; 21, battery cell row; 211, battery cell; 30, sealing bracket; 301, groove; 31, protrusion; 40, sealing gasket; 50, first sealing strip; 60, second sealing strip; 70, third sealing strip; 80, adjusting gasket. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used 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 in the specification of this application includes any and all combinations of one or more related listed items.

[0032] The endurance of new energy vehicles is still an important factor restricting the development of new energy vehicles. As a major technical means to solve the endurance problem of new energy vehicles, fast charging technology can alleviate people's anxiety about the endurance of new energy vehicles to a certain extent.

[0033] At present, with the gradual increase in fast charging rates, the heat generated by the battery cells has also increased exponentially. The traditional bottom liquid cooling method alone can no longer meet the temperature rise under fast charging conditions. Once the temperature of the battery cell is too high, it is difficult to ensure the supercharging performance of the battery cell. The immersion cooling design, that is, immersing the battery cell in insulating coolant, can effectively increase the contact area with the battery cell, thereby improving the heat dissipation capacity of the battery cell. However, most of the existing immersion cooling structures are fully immersed, which not only has poor fluidity, but also has a high risk of leakage.

[0034] See also Figure 1-Figure 8 In order to solve the problem of a large leakage risk in the existing immersion cooling structure, the present application provides an immersion battery cooling structure 100.

[0035] It should be noted that the insulating coolant used in the immersed battery cooling structure 100 needs to meet good insulation and thermal conductivity performance, and also needs to have good chemical stability and not be easy to burn or corrode electronic components. Usually, the insulating coolant can be oil or fluorinated liquid. The present application preferably uses oil, which is low in cost and can meet environmental protection requirements.

[0036] See also Figure 1The immersion battery cooling structure 100 provided in the present application includes a box assembly 10, a battery cell row 21 and a sealing bracket 30. The box assembly 10 is provided with a receiving cavity 101 and a receiving opening 102 communicating with the receiving cavity 101, and the box assembly 10 is provided with a shunt channel 131 and a confluence channel 111, wherein the confluence channel 111 is arranged on the side of the receiving cavity 101 away from the receiving opening 102. The battery cell row 21 is installed in the receiving cavity 101 through the receiving opening 102, and the number of the battery cell rows 21 is multiple, and the multiple battery cell rows 21 are arranged at intervals along the first preset direction to form a battery cell group 20, and gap channels 201 are formed between adjacent battery cell rows 21, and each gap channel 201 is respectively communicated with the shunt channel 131 and the confluence channel 111. The sealing bracket 30 is disposed on a side of the battery cell group 20 close to the receiving opening 102 , and is sealedly connected to the battery cell group 20 and the box assembly 10 respectively to block a side of the gap flow channel 201 close to the receiving opening 102 .

[0037] The present application sets a gap flow channel 201 between adjacent battery cell rows 21, so that the insulating coolant in the shunt channel 131 can flow into the converging channel 111 through the gap flow channel 201, that is, the side and bottom surfaces of the battery cell row 21 can contact the insulating coolant, ensuring the contact area between the battery cell row 21 and the insulating coolant, thereby greatly improving the heat dissipation efficiency of the battery cell row 21. In addition, by setting a sealing bracket 30, the gap flow channel 201 can be sealed to prevent the insulating coolant flowing in the gap flow channel 201 from leaking, thereby effectively improving the sealing performance of the immersed battery cooling structure 100, so the traditional upper cover structure can be eliminated. Since the space occupied by the outer shell is reduced, the structure of the present application can not only reduce the manufacturing cost, but also help to improve the internal energy density and improve the endurance of new energy vehicles. In addition, the present application adopts a module-free structure, which can be formed only by arranging and installing the battery cell row 21, further reducing the number of components and improving space utilization.

[0038] It should be noted that the bottom surface of the battery cell row 21 refers to the lowest point of the battery cell row 21 along the gravity direction, that is, the end surface of the battery cell row 21 away from the accommodating opening 102 in the present application.

[0039] Specifically, each battery cell row 21 includes a plurality of battery cells 211 , and the plurality of battery cells 211 are arranged at intervals along a second preset direction, and the second preset direction is perpendicular to the first preset direction.

[0040] In one embodiment, if Figure 2 and Figure 3As shown, the box assembly 10 includes a lower box 11, a mounting frame 12, and a main longitudinal beam 13. The main longitudinal beam 13 extends along a first preset direction and overlaps the mounting frame 12, and the main longitudinal beam 13 and the mounting frame 12 are both mounted on the lower box 11, and the main longitudinal beam 13, the mounting frame 12, and the lower box 11 are surrounded to form a receiving cavity 101 and a receiving opening 102. Among them, the side wall of the main longitudinal beam 13 is provided with a diversion channel 131 and a liquid outlet 132 connecting the diversion channel 131 and the gap flow channel 201, and the lower box 11 is provided with a converging channel 111 and a liquid inlet 112 connecting the gap flow channel 201 and the converging channel 111.

[0041] It is understandable that the mounting frame 12 can be adapted to the structural setting of the battery cell group 20 to better fit the battery cell group 20 and further improve the sealing performance. In addition, the confluence channel 111 is provided in the lower box 11, realizing the integrated setting of the lower box 11 and the original liquid cooling plate structure, thereby further reducing the number of parts and greatly reducing the cost, while also ensuring the cooling performance. The main longitudinal beam 13 plays the role of diverting the insulating coolant.

[0042] Specifically, the main longitudinal beam 13 is arranged in the middle of the mounting frame 12, thereby dividing the interior of the mounting frame 12 into two parts of substantially the same size. That is, the number of the accommodating cavities 101 in the present application is two, and each accommodating cavity 101 is correspondingly installed with a battery cell group 20. In this way, the shunting difficulty of the shunting channel 131 in the main longitudinal beam 13 is reduced, and the temperature uniformity of the entire device is effectively improved.

[0043] Furthermore, if Figure 4 and Figure 5 As shown, the flow branch channel 131 has an inlet end 1311. The flow branch channel 131 includes a front flow branch channel 1312, a rear flow branch channel 1313, and a first branch channel 1314 connecting the front flow branch channel 1312 and the rear flow branch channel 1313. Along the first preset direction, the first branch channel 1314 and the front flow branch channel 1312 are both arranged on one side of the rear flow branch channel 1313 close to the inlet end 1311, and the first branch channel 1314 is arranged independently of the front flow branch channel 1312.

[0044] Since the overall size of the immersed battery cooling structure 100 is relatively large, if only a single channel is used for diversion, the flow near the inlet end 1311 and far from the inlet end 1311 in the diversion channel 131 will be uneven, thereby affecting the overall cooling performance. In the present application, by dividing the diversion channel 131 into a front-end diversion channel 1312 and a rear-end diversion channel 1313, and the rear-end diversion channel 1313 is connected to the inlet end 1311 through a first branch channel 1314, the size of the front-end diversion channel 1312 and the first branch channel 1314 can be reasonably set to ensure the uniformity of the flow of the front-end diversion channel 1312 and the rear-end diversion channel 1313, reduce the temperature difference of the front and rear battery cells 211, and improve the temperature consistency of the battery cells 211.

[0045] In one embodiment, the front branch channel 1312 includes a second branch channel 1312 a and a third branch channel 1312 b , and the second branch channel 1312 a and the third branch channel 1312 b are symmetrically arranged with respect to the center line of the first branch channel 1314 .

[0046] In this way, the flow rates of the insulating coolant in the second branch flow channel 1312a and the third branch flow channel 1312b are ensured to be the same, thereby improving the temperature consistency of the corresponding battery cells 211 on the opposite sides of the main longitudinal beam 13 near the inlet end 1311. The second branch flow channel 1312a and the third branch flow channel 1312b are both connected to the corresponding gap flow channel 201 through the corresponding liquid outlet hole 132.

[0047] In one embodiment, the rear branch channel 1313 includes a fourth branch channel 1313 a and a fifth branch channel 1313 b , and the fourth branch channel 1313 a and the fifth branch channel 1313 b are symmetrically arranged with respect to the center line of the first branch channel 1314 .

[0048] In this way, the flow rates of the insulating coolant in the fourth branch flow channel 1313a and the fifth branch flow channel 1313b are ensured to be the same, thereby improving the temperature consistency of the corresponding battery cells 211 on the opposite sides of the main longitudinal beam 13 away from the inlet end 1311. The second branch flow channel 1312a and the third branch flow channel 1312b are both connected to the corresponding gap flow channel 201 through the corresponding liquid outlet hole 132.

[0049] The flow areas of the first branch channel 1314, the second branch channel 1312a, the third branch channel 1312b, the fourth branch channel 1313a and the fifth branch channel 1313b can be reasonably set according to flow requirements and are not further limited herein.

[0050] It should be noted that the separation of the first branch channel 1314, the second branch channel 1312a and the third branch channel 1312b, or the separation of the fourth branch channel 1313a and the fifth branch channel 1313b can be achieved by setting corresponding partitions inside the main longitudinal beam 13, or can be formed by integral processing of the main longitudinal beam 13.

[0051] It should also be noted that, for multi-branch pipelines with the same structural dimensions, the flow of fluid has the following characteristics: the closer the branch pipe is to the inlet of the main pipe, the smaller the flow rate through the branch pipe.

[0052] To ensure uniformity of flow, in one embodiment, Figure 4 and Figure 5 As shown, the confluence channel 111 includes a front confluence channel 1111, a rear confluence channel 1112, and a total confluence channel 1113. There are multiple front confluence channels 1111, and the multiple front confluence channels 1111 are arranged at intervals along the first preset direction, and each front confluence channel 1111 can receive the insulating coolant flowing out through the front branch channel 1312, the corresponding liquid outlet hole 132, the corresponding gap channel 201, and the corresponding liquid inlet hole 112 in sequence, and merge into the total confluence channel 1113. There are multiple rear confluence channels 1112, and the multiple rear confluence channels 1112 are arranged at intervals along the first preset direction, and each rear confluence channel 1112 can receive the insulating coolant flowing out through the rear branch channel 1313, the corresponding liquid outlet hole 132, the corresponding gap channel 201, and the corresponding liquid inlet hole 112 in sequence, and merge into the total confluence channel 1113. Among them, along the first preset direction and from the direction close to the inlet end 1311 to the direction away from the inlet end 1311, the flow areas of the plurality of front end conduits 1111 and the plurality of rear end conduits 1112 gradually decrease.

[0053] In this way, by setting multiple front-end convergence channels 1111 and multiple rear-end convergence channels 1112 to a structure that is wide in the front and narrow in the rear, the resistance of the front-end convergence channels 1111 and the rear-end convergence channels 1112 located at the relatively rear end can be increased, thereby reducing the rear flow rate and increasing the front flow rate, making the overall flow rate uniform and further improving the temperature uniformity performance.

[0054] In one embodiment, if Figure 1 As shown, the immersed battery cooling structure 100 also includes a sealing gasket 40. Along the second preset direction, the sealing gasket 40 is arranged between adjacent battery cells 211 and is sealed and connected to two adjacent battery cells 211 respectively, so that independent gap flow channels 201 can be formed between adjacent battery cell rows 21.

[0055] By providing the sealing gasket 40 , different gap flow channels 201 can be provided independently of each other, which not only improves the sealing performance but also enables the insulating coolant to flow along a preset path, thereby improving fluidity.

[0056] Specifically, the sealing gasket 40 can be made of aerogel with low thermal conductivity, which has good thermal insulation performance, can absorb the expansion force of the battery cell 211 cycle, and effectively prevent the spread of temperature between adjacent battery cells 211 during thermal runaway, thereby greatly improving the safety of the immersed battery cooling structure 100.

[0057] Furthermore, in one embodiment, the submerged battery cooling structure 100 further includes an adjustment gasket 80, which is disposed between the battery cell group 20 and the mounting frame 12, and is used to adjust the assembly gap and tolerance. The adjustment gasket 80 can be made of the same aerogel material as the sealing gasket 40.

[0058] In one embodiment, if Figure 1 , Figure 6 and Figure 7 As shown, the immersed battery cooling structure 100 also includes a first sealing strip 50. The first sealing strip 50 is disposed between adjacent battery cell rows 21 and is respectively connected to two adjacent battery cell rows 21, and one end of the first sealing strip 50 along the first preset direction is disposed against the main longitudinal beam 13, and the other end is spaced apart from the mounting frame 12 to separate the gap flow channel 201 into a first gap branch channel 2011 communicating with the liquid outlet 132 and a second gap branch channel 2012 communicating with the liquid inlet 112. The insulating coolant in the first gap branch channel 2011 and the second gap branch channel 2012 flows in opposite directions.

[0059] In this way, the first gap branch 2011, the second gap branch 2012 and the bottom confluence channel 111 (the front end confluence channel 1111 or the rear end confluence channel 1112) form an S-shaped flow channel structure, and because the first gap branch 2011 is close to the inlet of the insulating coolant and has a lower temperature, the upper part of the battery cell 211 is cooled better than the lower part, thereby achieving alternating hot and cold on a large surface of the battery cell 211, and supplementing cooling is performed on the bottom of the battery cell 211 through the bottom confluence channel 111, so that the overall upper and lower temperatures of the battery cell 211 are uniform, thereby effectively preventing the problem of excessive temperature gradients at the top and bottom of the battery cell 211, which may reduce the service life of the battery cell 211.

[0060] The lower box body 11 can be formed by processing an aluminum plate. The aluminum plate has a large thermal conductivity and good temperature uniformity, which can further improve the temperature uniformity of the battery cell 211.

[0061] Furthermore, in one embodiment, the submerged battery cooling structure 100 further includes a second sealing strip 60 and a third sealing strip 70, which are disposed on opposite sides of the first sealing strip 50 and are spaced apart from the first sealing strip 50, and the second sealing strip 60 and the third sealing strip 70 are both connected to two adjacent battery cell rows 21. The two ends of the second sealing strip 60 and the third sealing strip 70 are spaced apart from the main longitudinal beam 13 and the mounting frame 12, respectively.

[0062] That is, the second sealing strip 60 and the third sealing strip 70 separate the first gap branch channel 2011 and the second gap branch channel 2012 to form a smaller flow channel structure, thereby further improving the flow performance of the insulating coolant. In addition, the second sealing strip 60 and the third sealing strip 70 will not block the flow channel, ensuring that the insulating coolant can flow smoothly from the first gap branch channel 2011 to the second gap branch channel 2012.

[0063] Specifically, the second sealing strip 60 is preferably disposed in the middle of the first gap branch channel 2011, and the third sealing strip 70 is preferably disposed in the middle of the second gap branch channel 2012, so as to ensure flow uniformity.

[0064] Of course, in other embodiments, the position of the second sealing strip 60 in the first gap branch 2011 and the position of the third sealing strip 70 in the second gap branch 2012 can also be flexibly adjusted as long as they do not hinder the circulation of the insulating coolant.

[0065] In summary, through the design of the above-mentioned S-shaped flow channel, the temperature uniformity of the battery cell 211 can be effectively improved, and the temperature of the battery cell 211 can be greatly reduced, thereby increasing the environmental adaptability of the battery cell 211 and meeting the cooling requirements of fast charging or super charging.

[0066] In one embodiment, the sealing bracket 30 is bonded to the battery cell group 20 and the box assembly 10 by a sealant. In this way, the sealing bracket 30 is simply connected and can achieve reliable connection with the battery cell group 20 and the box assembly 10.

[0067] The failure temperature of the sealant is usually less than 150°C. When the battery cell 211 experiences thermal runaway, the sealant melts, and the insulating coolant can be sprayed out in large quantities from the gap between the sealing bracket 30 and the battery cell group 20 or the box assembly 10, thereby covering the battery cell 211 in thermal runaway. On the one hand, the air is isolated to avoid the risk of subsequent cooling failure. On the other hand, during the evaporation process from liquid to gas, the insulating coolant can take away a large amount of heat to prevent the spread of heat, and the generated gas can be discharged by the explosion-proof valve, thus greatly improving the safety of the immersed battery cooling structure 100.

[0068] Specifically, Figure 7 and Figure 8As shown, the sealing bracket 30 is provided with a protrusion 31, and the protrusion 31 can be partially inserted into the gap flow channel 201. At the same time, a groove 301 is provided at one end of the sealing bracket 30 away from the protrusion 31. The groove 301 is used to accommodate the sealant, and the sealant can penetrate into the gap between the gap flow channel 201 and the protrusion 31 after overflowing from the groove 301 to achieve sealing, thereby preventing the insulating coolant from flowing out of the gap and improving safety.

[0069] The present application also provides a new energy vehicle, which includes the submerged battery cooling structure 100 described in any one of the above embodiments.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An immersion battery cooling structure, characterized in that: The invention comprises a box assembly (10), a battery cell row (21) and a sealing bracket (30), wherein the box assembly (10) is provided with a receiving cavity (101) and a receiving opening (102) communicating with the receiving cavity (101), and the box assembly (10) is provided with a shunt channel (131) and a converging channel (111), wherein the converging channel (111) is arranged on a side of the receiving cavity (101) away from the receiving opening (102); The battery cell row (21) is installed in the accommodating cavity (101) through the accommodating opening (102), and the number of the battery cell rows (21) is multiple, and the multiple battery cell rows (21) are arranged at intervals along a first preset direction to form a battery cell group (20), and gap flow channels (201) are sandwiched between adjacent battery cell rows (21), and each of the gap flow channels (201) is respectively connected to the diversion channel (131) and the converging channel (111); The sealing bracket (30) is arranged on a side of the battery cell group (20) close to the accommodating opening (102), and is respectively sealed to the battery cell group (20) and the box assembly (10) to block a side of the gap flow channel (201) close to the accommodating opening (102).

2. The immersed battery cooling structure according to claim 1, characterized in that: The box assembly (10) comprises a lower box (11), a mounting frame (12) and a main longitudinal beam (13); the main longitudinal beam (13) extends along the first preset direction and overlaps the mounting frame (12); the main longitudinal beam (13) and the mounting frame (12) are both mounted on the lower box (11); the main longitudinal beam (13), the mounting frame (12) and the lower box (11) are arranged to form the accommodating cavity (101) and the accommodating opening (102); The side wall of the main longitudinal beam (13) is provided with the diversion channel (131) and a liquid outlet (132) connecting the diversion channel (131) and the gap flow channel (201), and the lower box body (11) is provided with the converging channel (111) and a liquid inlet (112) connecting the gap flow channel (201) and the converging channel (111).

3. The immersed battery cooling structure according to claim 2, characterized in that: The flow diversion channel (131) has an inlet end (1311), and the flow diversion channel (131) comprises a front-end flow diversion channel (1312), a rear-end flow diversion channel (1313), and a first branch flow channel (1314) connecting the front-end flow diversion channel (1312) and the rear-end flow diversion channel (1313). Along the first preset direction, the first branch channel (1314) and the front branch channel (1312) are both arranged on a side of the rear branch channel (1313) close to the inlet end (1311), and the first branch channel (1314) is arranged independently of the front branch channel (1312).

4. The immersed battery cooling structure according to claim 3, characterized in that: The front branch flow channel (1312) includes a second branch flow channel (1312a) and a third branch flow channel (1312b), and the second branch flow channel (1312a) and the third branch flow channel (1312b) are symmetrically arranged relative to the center line of the first branch flow channel (1314); And / or, the rear end branch channel (1313) includes a fourth branch channel (1313a) and a fifth branch channel (1313b), and the fourth branch channel (1313a) and the fifth branch channel (1313b) are symmetrically arranged relative to the center line of the first branch channel (1314).

5. The immersed battery cooling structure according to claim 3, characterized in that: The confluence channel (111) comprises a front confluence channel (1111), a rear confluence channel (1112) and a total confluence channel (1113). There are a plurality of front end confluence channels (1111), the plurality of front end confluence channels (1111) are arranged at intervals along the first preset direction, and each of the front end confluence channels (1111) is capable of receiving the insulating coolant that flows out sequentially through the front end branch channel (1312), the corresponding liquid outlet hole (132), the corresponding gap channel (201), and the corresponding liquid inlet hole (112), and confluences the insulating coolant into the main confluence channel (1113); The number of the rear end confluence channels (1112) is plural, and the plurality of the rear end confluence channels (1112) are arranged at intervals along the first preset direction, and each of the rear end confluence channels (1112) is capable of receiving the insulating coolant that flows out through the rear end branch channel (1313), the corresponding liquid outlet hole (132), the corresponding gap channel (201), and the corresponding liquid inlet hole (112) in sequence, and confluences into the main confluence channel (1113); Wherein, along the first preset direction and from the direction close to the inlet end (1311) to the direction away from the inlet end (1311), the flow areas of the plurality of front end conduits (1111) and the plurality of rear end conduits (1112) gradually decrease.

6. The immersed battery cooling structure according to claim 2, characterized in that: Each of the battery cell rows (21) comprises a plurality of battery cells (211), and the plurality of battery cells (211) are arranged at intervals along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction; The immersed battery cooling structure also includes a sealing gasket (40). Along the second preset direction, the sealing gasket (40) is arranged between adjacent battery cells (211) and is respectively sealed and connected to two adjacent battery cells (211), so that mutually independent gap flow channels (201) can be formed between adjacent battery cell rows (21).

7. The submerged battery cooling structure according to claim 6, characterized in that: The immersed battery cooling structure further comprises a first sealing strip (50), wherein the first sealing strip (50) is arranged between adjacent battery cell rows (21) and is respectively connected to two adjacent battery cell rows (21), and one end of the first sealing strip (50) along the first preset direction is abutted against the main longitudinal beam (13), and the other end is spaced apart from the mounting frame (12) so as to separate the gap flow channel (201) into a first gap branch channel (2011) communicating with the liquid outlet hole (132) and a second gap branch channel (2012) communicating with the liquid inlet hole (112); The insulating coolant in the first gap branch channel (2011) and the insulating coolant in the second gap branch channel (2012) flow in opposite directions.

8. The immersed battery cooling structure according to claim 7, characterized in that: The immersed battery cooling structure further comprises a second sealing strip (60) and a third sealing strip (70), wherein the second sealing strip (60) and the third sealing strip (70) are arranged on opposite sides of the first sealing strip (50) and are spaced apart from the first sealing strip (50), and the second sealing strip (60) and the third sealing strip (70) are both connected to two adjacent battery cell rows (21); Wherein, both ends of the second sealing strip (60) and the third sealing strip (70) are respectively spaced apart from the main longitudinal beam (13) and the mounting frame (12).

9. The immersed battery cooling structure according to claim 1, characterized in that: The sealing bracket (30) is bonded to the battery cell group (20) and the box assembly (10) by means of a sealing adhesive.

10. A new energy vehicle, characterized in that: It comprises an immersed battery cooling structure as described in any one of claims 1 to claim 9.

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