Blind insertion type tenon-and-mortise liquid cooling plate with three-way pipe and battery box of blind insertion type tenon-and-mortise liquid cooling plate

Abstract

The invention discloses a blind insertion type mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof, the blind insertion type mortise and tenon type liquid cooling plate with the three-way pipe comprises a battery box cover, a battery box body, a mortise and tenon type liquid cooling plate, the three-way pipe, a liquid outlet pipe, a supporting layer and a battery module, the battery box cover is arranged on the battery box body, the battery box body is arranged on the supporting layer, and the three-way pipe is arranged on the battery box body. A liquid inlet and a liquid outlet are formed in the bottom of the tenon-and-mortise type liquid cooling plate, the three-way pipe is connected with the liquid inlet of the tenon-and-mortise type liquid cooling plate, the liquid outlet pipe is connected with the liquid outlet of the tenon-and-mortise type liquid cooling plate, the three-way pipe is laid in a three-way pipe channel of the supporting layer, and a circulating indirect type liquid cooling system is formed among the tenon-and-mortise type liquid cooling plate, the three-way pipe and the liquid outlet pipe. The battery module comprises a module box body and a plurality of batteries in the module box body. The problems that a liquid cooling plate in an existing indirect liquid cooling battery module is integrally cast, modular rapid assembly cannot be carried out, installation and cleaning are tedious, and temperature uniformity is poor are solved.

Description

Technical field:

[0001] The invention relates to the technical field of liquid cooling and heat dissipation, and in particular to a blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof. Background technology:

[0002] As energy demand continues to grow worldwide, the use of electric vehicles has received increasing attention. Battery electric vehicles have the potential to replace commercially available diesel or gasoline engines. Recent incidents involving electric vehicle fires have raised great attention to battery chemistry, battery design, battery management systems, and battery pack design to prevent thermal runaway. Lithium-ion batteries often fail due to thermal runaway problems because the internal temperature of the battery rises exponentially and the heat generation rate is faster than the heat release rate. Due to the limited tolerance of lithium-ion batteries to temperature, the safe operating range of lithium-ion batteries is between 15 and 35°C, and the temperature difference within the battery module should be less than 5°C.

[0003] Therefore, in order to maximize the service life and stability of lithium-ion battery packs, it is necessary to manage them through more efficient battery thermal management. Depending on the heat transfer medium, the battery thermal management system can be divided into four modes: air cooling (air cooling), phase change material cooling, heat pipe cooling and liquid cooling.

[0004] The air cooling system has good economic feasibility. Air cooling mainly relies on natural convection or forced convection, but its heat dissipation capacity is relatively low, which makes it difficult to meet the cooling needs of high-power lithium batteries. The thermal conductivity of phase change materials is low, and it is necessary to improve its thermal conductivity through the integration of thermal conductive materials. Heat pipe cooling has limitations under rapid temperature fluctuations and harsh environmental conditions. Indirect liquid cooling technology uses coolants with high specific heat capacity and high heat transfer coefficient to achieve rapid heat transfer, thereby more effectively controlling battery temperature. It can also provide better module temperature uniformity. Based on temperature balance and heat dissipation performance considerations, indirect liquid cooling is a more suitable heat dissipation method for new energy battery boxes.

[0005] A liquid cooling plate with publication number CN116565372A has multiple spoilers. Mainly by setting the spoilers, different flow channels can produce different resistances, thereby affecting the liquid flow rate, reasonably allocating the heat dissipation performance of different flow channels, and solving the problem of uneven heat dissipation of the battery module. However, since it only contacts the battery through the bottom surface, it is difficult to effectively dissipate the heat of the battery module when facing high-power working conditions, and the liquid cooling plate is manufactured as a whole, which is inconvenient during maintenance and cleaning. A welding-free spliced ​​shunt cold plate structure and a liquid cooling chassis with publication number CN115426832A solve the current technical problems of complex processing of shunt cold plates and difficult cleanliness control during processing, but there is still an uneven temperature difference in the module between the liquid inlet and the liquid outlet. The battery thermal management device with strong temperature uniformity maintenance capability, with publication number CN115986266A, mainly describes the use of a symmetrical flow channel network layout, combined with the branch inclined design of the flow channel, to solve the problem of uneven heat dissipation performance of the liquid cooling plate due to the increase in temperature when the coolant flows in the flow channel, and also particularly strengthens the heat dissipation effect of the liquid cooling plate in the center area of ​​the battery pack. However, due to the integral casting of the cold plate, it is still difficult to maintain temperature consistency at the front and rear ends, especially in the case of larger battery modules, the bottom of the battery does not effectively dissipate heat, and there are too many liquid inlets, which are not easy to set in actual operation and have high space requirements. Summary of the invention:

[0006] The object of the present invention is to provide a blind-insertion mortise and tenon liquid cooling plate with a three-way pipe and a battery box thereof, so as to solve the problems of heat dissipation efficiency of the battery box, uneven temperature distribution inside the battery module, and high cost required for maintenance, cleaning and replacement of traditional liquid cooling plates.

[0007] In order to achieve the above-mentioned purpose, the following technical scheme is adopted. The present invention discloses a blind-plug mortise and tenon liquid cooling plate with a three-way pipe and a battery box thereof, including a battery box cover, a mortise and tenon liquid cooling plate, a three-way pipe, a support layer, a battery module, a battery box body, a liquid outlet pipe and a leak-proof blind plug joint. The battery box cover is arranged on the battery box body, and the battery box body is arranged on the support layer. The bottom of the mortise and tenon liquid cooling plate is provided with a liquid inlet and a liquid outlet. The three-way pipe liquid outlet and the mortise and tenon liquid cooling plate liquid inlet are mutually connected through the leak-proof blind plug joint. The liquid inlet of the liquid outlet pipe and the liquid outlet of the mortise and tenon liquid cooling plate are mutually connected through the leak-proof blind plug joint. The three-way pipe is laid in the three-way pipe groove of the support layer. A circulating indirect liquid cooling system is formed between the mortise and tenon liquid cooling plate, the three-way pipe and the liquid outlet pipe. The battery module includes a module box and a number of batteries therein. When the battery is working, the battery generates heat due to the transfer of lithium ions, and the heat is mainly concentrated inside the battery box. The liquid cooling plate is in direct contact with the battery surface and absorbs heat through contact heat exchange. The coolant (such as water, ethylene glycol solution or other special liquids) circulates in the flow channel inside the liquid cooling plate, taking away the heat conducted by the liquid cooling plate. The coolant enters the three-way pipes at each level from the three-way pipe inlet, circulates through the mortise and tenon liquid cooling plate and the internal flow channel, flows out from the mortise and tenon liquid cooling plate outlet, enters the liquid inlet of the outlet pipe, and is finally discharged from the outlet of the outlet pipe.

[0008] As a further description of the above technical solution: the mortise and tenon type liquid cooling plate is provided with dovetail mortise and tenon structures on both side surfaces and the front and rear surfaces. The mortise and tenon type liquid cooling plates are connected in pairs through the dovetail mortise and tenon structures to form a whole liquid cooling plate. At the same time, the mortise and tenon type liquid cooling plates can be increased or reduced according to actual needs.

[0009] As a further description of the above technical solution: there is a flow channel structure inside the mortise and tenon type liquid cooling plate; wherein, the flow channel is provided with a liquid inlet and a liquid outlet at the bottom of the mortise and tenon type liquid cooling plate, and the central angle corresponding to each arc segment of the flow channel is 150° to 180°.

[0010] As a further description of the above technical solution: the mortise and tenon type liquid cooling plate has a battery adapter groove on the left and right sides to fit with the battery surface and better absorb heat through contact heat conversion. The battery adapter groove can be semicircular, arc-shaped and square, and can be customized according to different needs to ensure convenience and adaptability of operation.

[0011] As a further description of the above technical solution: the tee starts from the tee inlet and extends to the left and right sides to keep the same length. The tee includes a primary tee, a secondary tee, a tertiary tee, and a quaternary tee. There is one primary tee, two secondary tee, four tertiary tee, and eight tertiary tee. The number of pipes doubles for each additional level, and so on. The diameter of the main pipe at the tee inlet is not limited, but the branch pipes of each level of the tee are of equal diameter, so as to ensure that the pressure of each branch pipe is equal. The primary tee is connected to the tee inlet, and the tee outlet is connected to the bottom inlet of the mortise and tenon type liquid cooling plate. The coolant enters from the tee inlet, passes through the quaternary tee, and enters the mortise and tenon type liquid cooling plate inlet from the tee outlet.

[0012] As a further description of the above technical solution: the liquid inlet of the liquid outlet pipe is evenly distributed, arranged at a position corresponding to the liquid outlet at the bottom of the mortise and tenon type liquid cooling plate, and communicated with the liquid outlet of the liquid outlet pipe. The coolant enters the liquid inlet of the liquid outlet pipe from the liquid outlet of the mortise and tenon type liquid cooling plate, passes through the liquid outlet pipe, and flows out from the liquid outlet of the liquid outlet pipe.

[0013] As a further description of the above technical solution: a groove of a three-way pipe is arranged on the surface of the support layer, and the three-way pipe is laid in the groove of the three-way pipe.

[0014] As a further description of the above technical solution: it includes a leak-proof blind plug connector, the blind plug connector includes a male head and a female head that are connected to each other in cooperation, the three-way pipe liquid outlet is connected with a female head, the liquid inlet of the liquid outlet pipe is connected with a female head, the liquid inlet of the mortise and tenon type liquid cooling plate is connected with a male head, and the liquid outlet of the mortise and tenon type liquid cooling plate is connected with a male head, and the pipelines are connected by the mutual cooperation of the male head at the liquid inlet of the mortise and tenon type liquid cooling plate and the female head at the liquid outlet of the three-way pipe and the male head at the liquid outlet of the mortise and tenon type liquid cooling plate and the female head at the liquid inlet of the liquid outlet pipe. The male head and the female head are both existing finished universal parts, with threads and sealing rings at one end, which can achieve the effect of water passing without leakage after cooperation, and can also prevent the liquid in the pipe from flowing out when disconnected.

[0015] The blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and the battery box thereof provided in the embodiment of the present invention have the following beneficial effects:

[0016] 1. The present invention disassembles the entire liquid cooling plate and sets a mortise and tenon structure on both sides of the individual liquid cooling plates, so that the processing, manufacturing, installation, maintenance, replacement and cleaning of the liquid cooling plate are more convenient and economical. Traditional liquid cooling plates are mostly one-piece castings, with high maintenance costs and narrow application scenarios. The mortise and tenon liquid cooling plate has high economic value. When the mortise and tenon liquid cooling plate fails, the dovetail mortise and tenon structure can be used to conveniently plug and unplug to determine the specific damaged module, and then replace it with the corresponding mortise and tenon liquid cooling plate, which can greatly improve the use efficiency of the liquid cooling plate. Due to the various shapes of common batteries, the battery adapter grooves are semicircular, arc-shaped and square. It can be selected and customized according to different needs to ensure the convenience and adaptability of operation. At the same time, since the mortise and tenon liquid cooling plate can be flexibly assembled, the size of the liquid cooling plate can actually be determined according to the application scenario, and is no longer limited to a specific size, thereby achieving the versatility of indirect liquid cooling. The entire liquid cooling plate is connected in pairs through multiple mortise and tenon liquid cooling plates through a dovetail mortise and tenon structure, and a liquid inlet and a liquid outlet are arranged at the bottom of the single mortise and tenon liquid cooling plate, forming an independent indirect liquid cooling circulation system with the three-way pipe, the liquid outlet pipe and the supporting layer. Without affecting the heat dissipation performance of the overall battery module, it greatly improves the disadvantage of the large temperature difference between the front and rear ends of the traditional liquid cooling plate, effectively solves the heat dissipation problem of the battery box, the temperature balance problem inside the battery module, and the temperature balance problem between different battery modules, thereby improving the battery pack life.

[0017] 2. The present invention divides the multi-stage tee into two parts, so that the coolant flows in through the tee inlet, enters the first-stage tee, the second-stage tee, the third-stage tee, and the fourth-stage tee in sequence, and finally enters the flow channel through the inlet at the bottom of the mortise and tenon type liquid cooling plate, and starts the circulation of the individual indirect liquid cooling system. The tee can ensure that the coolant maintains a uniform flow rate, so that the coolant inlet flow rate between each mortise and tenon type liquid cooling plate is consistent, and the uniform distribution of temperature is enhanced on the existing basis, which greatly reduces the resistance of the working fluid flow and the inconsistency of the pressure drop. Description of the drawings:

[0018] Figure 1 This is a structural schematic diagram of a blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof proposed by the present invention;

[0019] Figure 2 The present invention proposes Figure 1 Partial schematic diagram of the middle mortise and tenon joint;

[0020] Figure 3 The present invention proposes Figure 2 Cross-sectional view of the middle mortise and tenon type liquid cooling plate;

[0021] Figure 4 The present invention proposes Figure 1 A partial schematic diagram of the middle tee pipe;

[0022] Figure 5 The present invention proposes Figure 1 A partial schematic diagram of the liquid outlet pipe;

[0023] Figure 6 The present invention proposes Figure 1 Cross-sectional view of the middle support layer.

[0024] Figure 7 The present invention proposes Figure 1 Middle male and female heads.

[0025] Figure 8 The present invention proposes Figure 1 Medium leak-proof blind-mating connector.

[0026] Legend:

[0027] 1. Battery box cover; 2. Mortise and tenon type liquid cooling plate; 201. Liquid inlet at the bottom of the mortise and tenon type liquid cooling plate; 202. Liquid outlet at the bottom of the mortise and tenon type liquid cooling plate; 203. Dovetail mortise and tenon structure; 204. Battery adapter slot; 205. Flow channel; 3. Tee pipe; 301. Liquid inlet of the tee pipe; 302. First-level tee pipe; 303. Second-level tee pipe; 304. Third-level tee pipe; 305. Fourth-level tee pipe; 306. Tee Tube liquid outlet; 4. Support layer; 401. Three-way pipe groove; 5. Battery module; 6. Battery box body; 7. Liquid outlet pipe; 701. Liquid inlet of liquid outlet pipe; 702. Liquid outlet of liquid outlet pipe; 8. Leak-proof blind plug connector; 801. Female connector at the liquid outlet of the three-way pipe; 802. Female connector at the liquid inlet of the liquid outlet pipe, 803. Male connector at the liquid inlet of the mortise and tenon type liquid cooling plate; 804. Male connector at the liquid outlet of the mortise and tenon type liquid cooling plate. Specific implementation method:

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] At present, in the relevant technical field, the liquid cooling plate in the indirect liquid-cooled battery module is cast as a whole, which cannot be quickly assembled in a modular manner. It is relatively cumbersome in installation and cleaning, and the temperature uniformity is not well maintained.

[0032] In order to solve this problem, various embodiments of a blind-insertion mortise and tenon liquid cooling plate with a three-way pipe and a battery box thereof are proposed in the present invention. The present invention splits the entire liquid cooling plate and sets mortise and tenon structures on both sides of the individual liquid cooling plates, so that the processing, manufacturing, installation, maintenance, replacement and cleaning of the liquid cooling plate are more convenient and economical. The entire liquid cooling plate is connected in pairs through multiple mortise and tenon liquid cooling plates through dovetail mortise and tenon structures, and a liquid inlet and a liquid outlet are set at the bottom of the single mortise and tenon liquid cooling plate, forming an independent indirect liquid cooling circulation system with the three-way pipe, the liquid outlet pipe and the supporting layer. Without affecting the heat dissipation performance of the overall battery module, it greatly improves the disadvantage of the large temperature difference between the front and rear ends of the traditional liquid cooling plate, and effectively solves the heat dissipation problem of the battery box, the temperature balance problem inside the battery module, and the temperature balance problem between different battery modules.

[0033] The embodiment of the present invention provides a blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof.

[0034] In this embodiment, Figure 1As shown, a blind-plug-type mortise and tenon-type liquid cooling plate with a three-way pipe and a battery box thereof, comprising a battery box cover (1), a mortise and tenon-type liquid cooling plate (2), a three-way pipe (3), a support layer (4), a battery module (5), a battery box body (6), a liquid outlet pipe (7) and a leak-proof blind-plug joint (8), wherein the battery box cover (1) is arranged on the battery box body (6), the battery box body (6) is arranged on the support layer (4), the mortise and tenon-type liquid cooling plate (2) is provided with a liquid inlet (201) and a liquid outlet (202) at the bottom, and the three-way pipe outlet (201) is provided with a liquid inlet (201) and a liquid outlet (202) at the bottom. The liquid port (306) and the liquid inlet (201) of the mortise and tenon type liquid cooling plate are connected to each other through the leak-proof blind plug joint (8); the liquid inlet (701) of the liquid outlet pipe and the liquid outlet (202) of the mortise and tenon type liquid cooling plate are connected to each other through the leak-proof blind plug joint (8); the tee pipe (3) is laid in the tee pipe groove (401) of the supporting layer; a circulating indirect liquid cooling system is formed between the mortise and tenon type liquid cooling plate (2), the tee pipe (3) and the liquid outlet pipe (7); and the battery module (5) comprises a module box and a plurality of batteries therein.

[0035] When the battery is working, the transfer of lithium ions causes the battery to generate heat, and the heat is mainly concentrated inside the battery box. The liquid cooling plate (2) is in direct contact with the surface of the battery and absorbs heat through contact heat exchange. The coolant (such as water, ethylene glycol solution or other special liquid) circulates in the flow channel (205) inside the liquid cooling plate (2), taking away the heat conducted by the liquid cooling plate (2). The coolant enters the three-way pipes of each level from the three-way pipe inlet (301), circulates through the mortise and tenon type liquid cooling plate (2) and the internal flow channel (205), flows out from the mortise and tenon type liquid cooling plate outlet (202), enters the outlet pipe inlet (701), and is finally discharged from the outlet pipe outlet (702).

[0036] In this embodiment, Figure 2 As shown, the mortise and tenon type liquid cooling plate 2 is provided with dovetail mortise and tenon structures 203 on both side surfaces and the front and rear surfaces. The mortise and tenon type liquid cooling plates 2 are connected in pairs through the dovetail mortise and tenon structures 203 to form a whole liquid cooling plate. The dovetail mortise and tenon joints 203 on both side surfaces and the front and rear surfaces can be processed by CNC milling or other forming tools.

[0037] In this embodiment, Figure 2 As shown, the mortise and tenon type liquid cooling plate (2) has a battery adapter groove (204) on the left and right sides, so as to fit with the battery surface and better absorb heat through contact heat conversion. The battery adapter groove (204) can be semicircular, arc-shaped or square, and can be customized according to different needs to ensure the convenience and adaptability of operation.

[0038] The dovetail mortise and tenon structure 203 of the mortise and tenon type liquid cooling plate 2 is first subjected to surface sandblasting after the structural parts are processed in shape. This step is to improve the adhesion of the paint on its surface. Then, a nylon three-proof paint containing polytetrafluoroethylene and molybdenum disulfide is applied to the guide rail groove area. This coating not only gives the structural parts an additional protective layer, enhancing their weather resistance, corrosion resistance and moisture resistance, but also optimizes the surface finish of the dovetail mortise and tenon structure 203 in the mortise and tenon type liquid cooling plate 2, ensuring smoother adjustment and maintenance of the module.

[0039] After the shape processing of the structure is completed, the semicircular battery adapter groove 204 of the mortise and tenon type liquid cooling plate 2 is sprayed with thermal conductive silicone grease or graphene on its surface to improve the thermal contact efficiency and ensure that the mortise and tenon type liquid cooling plate 2 can fully take away the heat when the battery module 5 is working.

[0040] In this embodiment, Figure 3 As shown, the mortise and tenon type liquid cooling plate 2 has a flow channel 205 inside, and the flow channel 205 can be formed by mechanical processing technology, such as milling or drilling.

[0041] Alternatively, in some cases, an inflation process may be used to form a three-dimensional flow channel.

[0042] After the flow channel 205 of the mortise and tenon type liquid cooling plate 2 is processed, the internal flow channel is firstly thoroughly flushed to remove the residual debris and impurities generated during the processing. For those materials that may have corrosive chemical reactions with the coolant, further protective measures will be taken, such as electroplating or anodizing processes, to enhance their corrosion resistance and ensure the durability of the structure. Before the splicing operation of each mortise and tenon type liquid cooling plate 5 is carried out, the interior will be carefully inspected using detection tools such as endoscopes to ensure that there are no foreign objects left behind, so as to ensure the unobstructed and long-term stable operation of the cooling system.

[0043] In this embodiment, Figure 4As shown, the tee (3) starts from the tee liquid inlet (301) and extends to the left and right sides to keep the same length. The tee includes a primary tee (302), a secondary tee (303), a tertiary tee (304), and a quaternary tee (305). There is one primary tee (302), two secondary tee (303), four tertiary tee (304), and eight quaternary tee (305). The number of pipes doubles for each additional level, and so on. The diameter of the main pipe at the tee liquid inlet (301) is not limited, but the diverter pipes of each level of the tee are of equal diameter, so as to ensure that the pressure distribution of each diverter pipe is equal. The first-stage three-way pipe (302) is connected to the three-way pipe liquid inlet (301), and the three-way pipe liquid outlet (306) is connected to the bottom liquid inlet (201) of the mortise and tenon type liquid cooling plate. The cooling liquid enters from the three-way pipe liquid inlet (301), and is transported to the bottom liquid inlet (201) of the mortise and tenon type liquid cooling plate through a uniform pressure drop of the multi-stage three-way pipe.

[0044] In this embodiment, Figure 5 As shown, the liquid inlet (701) of the liquid outlet pipe is evenly distributed, arranged at a position corresponding to the liquid outlet (202) at the bottom of the mortise and tenon type liquid cooling plate, and communicated with the liquid outlet (702) of the liquid outlet pipe. The coolant enters the liquid inlet (701) of the liquid outlet pipe from the liquid outlet (202) of the mortise and tenon type liquid cooling plate, passes through the liquid outlet pipe (7), and flows out from the liquid outlet (702) of the liquid outlet pipe.

[0045] In this embodiment, Figure 6 As shown, the surface of the support layer (4) is provided with the groove (401) of the tee pipe, and the tee pipe (3) is laid in the groove (401) of the tee pipe.

[0046] In this embodiment, Figure 7 and Figure 8 As shown, it comprises a leak-proof blind plug connector (8), the blind plug connector (8) comprises a male head and a female head which are matched and connected to each other, the three-way pipe liquid outlet (306) is connected to the female head (801), the liquid inlet (701) of the liquid outlet pipe is connected to the female head (802), the mortise and tenon type liquid cooling plate liquid inlet (201) is connected to the male head (803), and the mortise and tenon type liquid cooling plate liquid outlet (202) is connected to the male head (804), and the pipelines are connected by the mutual cooperation of the male head (803) at the liquid inlet of the mortise and tenon type liquid cooling plate and the female head (801) at the liquid outlet of the three-way pipe, and the male head (804) at the liquid outlet of the mortise and tenon type liquid cooling plate and the female head (802) at the liquid inlet of the liquid outlet pipe. The male and female heads are both existing finished universal parts, with threads and sealing rings at one end, which can achieve the effect of water passing without leakage when matched, and can also prevent the liquid in the tube from flowing out when disconnected.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The present invention discloses a blind-plug-type mortise-and-tenon liquid cooling plate with a three-way pipe and a battery box thereof, comprising a battery box cover (1), a mortise-and-tenon liquid cooling plate (2), a three-way pipe (3), a support layer (4), a battery module (5), a battery box body (6), a liquid outlet pipe (7) and a leak-proof blind-plug joint (8), wherein the battery box cover (1) is arranged on the battery box body (6), the battery box body (6) is arranged on the support layer (4), the mortise-and-tenon liquid cooling plate (2) is provided with a liquid inlet (201) and a liquid outlet (202) at the bottom, and the three-way pipe (3) is provided with a liquid inlet (201) and a liquid outlet (202) at the bottom. The pipe liquid outlet (306) and the mortise and tenon type liquid cooling plate liquid inlet (201) are mutually connected through the leak-proof blind plug joint (8); the liquid outlet pipe liquid inlet (701) and the mortise and tenon type liquid cooling plate liquid outlet (202) are mutually connected through the leak-proof blind plug joint (8); the tee pipe (3) is laid in the tee pipe groove (401) of the supporting layer; a circulating indirect liquid cooling system is formed between the mortise and tenon type liquid cooling plate (2), the tee pipe (3) and the liquid outlet pipe (7); and the battery module (5) comprises a module box and a plurality of batteries therein.

2. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 1, characterized in that: The mortise and tenon type liquid cooling plate (2) is provided with dovetail mortise and tenon structures (203) on both side surfaces and the front and rear surfaces. The mortise and tenon type liquid cooling plates (2) are connected in pairs through the dovetail mortise and tenon structures (203) to form a whole liquid cooling plate. At the same time, the mortise and tenon type liquid cooling plates (2) can be increased or decreased according to actual needs.

3. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 2, characterized in that: The mortise and tenon type liquid cooling plate (2) has a flow channel structure (205) inside; wherein the flow channel (205) is provided with a liquid inlet (201) and a liquid outlet (202) at the bottom of the mortise and tenon type liquid cooling plate.

4. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 1, characterized in that: The mortise and tenon type liquid cooling plate (2) has a battery adapting groove (204) on the left and right sides, and the battery adapting groove can be semicircular, arc-shaped or square, and can be customized according to different needs.

5. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 1, characterized in that: The three-way pipe (3) starts from the three-way pipe liquid inlet (301) and extends to the left and right sides to keep the same length. The three-way pipe (3) includes a first-level three-way pipe (302), a second-level three-way pipe (303), a third-level three-way pipe (304), and a fourth-level three-way pipe (305). There is one first-level three-way pipe (302), two second-level three-way pipes (303), four third-level three-way pipes (304), and eight fourth-level three-way pipes (305). The number of pipes doubles for each additional level, and so on. The first-level three-way pipe (302) is connected to the three-way pipe liquid inlet (301), and the three-way pipe liquid outlet (306) is connected to the bottom liquid inlet (201) of the mortise and tenon type liquid cooling plate.

6. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 1, characterized in that: The liquid inlets (701) of the liquid outlet pipes are evenly distributed, arranged at positions corresponding to the liquid outlets (202) at the bottom of the mortise and tenon type liquid cooling plate, and communicate with the liquid outlets (702) of the liquid outlet pipes.

7. A blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and a battery box thereof according to claim 1, characterized in that: A tee pipe groove (401) is provided on the surface of the support layer (4), and the tee pipe (3) is laid in the tee pipe groove (401).

8. The blind-insertion mortise and tenon type liquid cooling plate with a three-way pipe and the battery box thereof according to claim 1, characterized in that: A leakproof blind plug connector (8) is provided, wherein the blind plug connector comprises a male head and a female head which are mutually matched and connected, wherein the three-way pipe liquid outlet (306) is connected to the female head (801), the liquid outlet pipe liquid inlet (701) is connected to the female head (802), the mortise and tenon type liquid cooling plate liquid inlet (201) is connected to the male head (803), and the mortise and tenon type liquid cooling plate liquid outlet (202) is connected to the male head (804), and the pipelines are connected by the mutual matching of the female head (801) and the male head (803) and the female head (802) and the male head (804).

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