Lithium battery module structure with internal thermal management channel

Abstract

The invention discloses a lithium battery module structure with an internal thermal management channel, and belongs to the technical field of battery management.The lithium battery module structure with the internal thermal management channel comprises an outer shell and a lithium battery pack, and a top cover is installed at the top of the outer shell; two sets of wire inlet and outlet holes are symmetrically formed in the middle positions of the two ends of the outer shell, a protection mechanism is arranged in the outer shell, and a first channel mechanism used for allowing cooling liquid to flow is arranged in the inner wall of the protection mechanism. The heat dissipation grooves are formed in the two sides of the protection bin, a plurality of channels are divided through the n-shaped heat conduction strips, one end of each internal heat conduction rod extends to the liquid outlet channel, waste heat of cooling liquid and heat conducted to the bin wall by a battery can be guided out, heat dissipation of the surfaces of the heat conduction rods is accelerated through the fans in the heat dissipation grooves, and the design constructs a liquid cooling and air cooling synergistic heat dissipation mode; the overall heat dissipation effect is further enhanced, and the heat management capacity of the module under different working conditions is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of battery management technology, specifically relating to a lithium battery module structure with an internal thermal management channel. Background Technology

[0002] With the rapid development of new energy vehicles, large-scale energy storage and other fields, lithium batteries, as the core energy carrier, have their performance, lifespan and safety characteristics highly dependent on the temperature environment. Battery thermal management systems have become one of the core technologies for the safe and reliable development of the new energy industry. However, the thermal management design of existing lithium battery modules still has many shortcomings and is difficult to meet the needs of high integration and multi-condition use.

[0003] Existing lithium battery modules mostly adopt an integrated placement structure without effective separation of individual battery cells. This leads to the accumulation of heat when multiple battery cells are densely packed, forming localized high-temperature areas. Furthermore, traditional liquid cooling or heat-conducting structures have limited contact area; the coolant only covers a portion of the battery surface, resulting in poor heat conduction paths and an inability to quickly dissipate heat from the core heat-generating areas of the battery. The lack of auxiliary heat-conducting structures to increase the heat exchange area further reduces heat dissipation efficiency. Current mainstream lithium battery module heat dissipation designs primarily focus on the sides and bottom of the battery, generally neglecting the heat dissipation needs of the top. Since the top of the battery is typically a concentrated area for components such as tabs and connectors, it is also a region prone to heat accumulation. This lack of localized heat dissipation not only affects overall heat dissipation... Furthermore, the existing lithium battery module's heat dissipation methods mostly adopt a single cooling mode, which is difficult to take into account the heat dissipation requirements under different operating conditions. It lacks a design that organically combines multiple heat dissipation modes and cannot enhance the heat dissipation effect through synergy. As a result, the module's thermal management capability under extreme environments or complex operating conditions is limited, making it difficult to maintain a stable operating temperature. At the same time, the thermal management system of traditional lithium battery modules lacks a flexible adjustment mechanism and cannot dynamically adjust the heat dissipation intensity according to the battery's workload. Moreover, when multiple modules are used in combination, the existing design is difficult to achieve coordinated linkage of the heat dissipation systems of each module and cannot uniformly adjust the coolant distribution and heat dissipation intensity according to the overall load, resulting in unstable thermal management effect after multiple modules are combined. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a lithium battery module structure with an internal thermal management channel.

[0005] The technical solution adopted to solve the above technical problems is: a lithium battery module structure with an internal thermal management channel, including a housing and a lithium battery pack. A top cover is installed on the top of the housing. Two sets of inlet and outlet holes are symmetrically opened at the middle positions of both ends of the housing. A protective mechanism is provided inside the housing. A first channel mechanism for supplying coolant flow is provided in the inner wall of the protective mechanism. A second channel mechanism for cooling the top of the lithium battery is provided on both sides of the top of the protective mechanism. Connecting mechanisms that cooperate with the first channel mechanism are provided at both ends of the housing. Heat dissipation mechanisms that cooperate with the first channel mechanism are provided on both sides of the housing.

[0006] Furthermore, the protection mechanism includes a protective compartment located inside the outer shell. A central partition is installed in the middle of the protective compartment, and two sets of partition plates fixedly connected to the inner wall of the protective compartment are symmetrically installed on both sides of the central partition. The interior of the protective compartment is divided into six placement compartments by the central partition and the partition plates, and each of the six placement compartments is equipped with a lithium battery pack.

[0007] The above technical solution divides the internal space of the protective compartment into six independent placement compartments, allowing the lithium battery packs to be placed independently in each group. On the one hand, the independent placement compartments block heat transfer between different battery groups, avoiding heat concentration caused by dense arrangement, and providing each battery group with a dedicated heat dissipation area. On the other hand, the middle partition and the partition plate form a multi-layer mechanical support structure, which, together with the wrapping effect of the protective compartment, disperses the impact force generated by external collisions and vibrations, reducing the probability of individual battery cells being affected by external forces, while providing a precise installation benchmark for the pipeline layout of the first channel mechanism.

[0008] Furthermore, the first channel mechanism includes a liquid supply channel located inside the partition plate, liquid outlet channels are provided inside both sides of the protective chamber, first heat conduction pipes are evenly arranged in the inner walls at both ends of the placement chamber, and second heat conduction pipes are evenly arranged in the inner wall at the bottom of the placement chamber. One end of the first heat conduction pipe and the second heat conduction pipe are connected to the interior of the liquid supply channel, and the other end of the first heat conduction pipe and the second heat conduction pipe are connected to the interior of the liquid outlet channel.

[0009] Through the above technical solution, a liquid supply channel is set in the middle partition, and liquid outlet channels are opened on both sides of the protective compartment. A first heat conduction pipe and a second heat conduction pipe are arranged at both ends and the bottom inner wall of each group of placement compartments, respectively. The two types of heat conduction pipes are connected to the liquid supply channel and the liquid outlet channel at both ends, forming a complete liquid cooling circuit of "liquid supply-diversion-heat absorption-convergence". After the coolant is diverted from the liquid supply channel, it directly contacts the side and bottom of the battery through the heat conduction pipe, efficiently absorbs the heat of the core heat-generating area and quickly flows into the liquid outlet channel for discharge, realizing the rapid conduction and removal of heat. The uniform arrangement of multiple sets of heat conduction pipes ensures that the heat dissipation conditions of each group of batteries and each cell are consistent, improving the overall temperature uniformity.

[0010] Furthermore, the inner ends of the placement chamber are symmetrically provided with inner slots, and a heat-conducting plate is installed inside the inner slot. The inner side of the heat-conducting plate is in close contact with the outer side of the first heat-conducting pipe.

[0011] Through the above technical solution, the heat-conducting plate expands the contact range with the side of the battery, concentrates the heat dispersed on the battery surface to the first heat-conducting pipe, solves the problem of insufficient heat exchange caused by partial contact between the heat-conducting pipe and the battery, and at the same time, the heat-conducting plate itself has good thermal conductivity, which accelerates the heat transfer rate from the battery to the coolant, and further improves the heat dissipation efficiency.

[0012] Furthermore, the second channel mechanism includes a compartment cover, of which two sets are provided, and the two sets of compartment covers are symmetrically hinged to the top of both sides of the protective compartment. The bottom of the compartment cover has a groove adapted to the top of the lithium battery pack. The two ends of the inside of the compartment cover are symmetrically provided with an outlet longitudinal groove and an inlet longitudinal groove. The outlet longitudinal groove and the inlet longitudinal groove are connected by several sets of transverse grooves. One side of the top end of the compartment cover is equipped with an outlet interface that communicates with the inside of the outlet longitudinal groove. The other side of the top end of the compartment cover is equipped with an inlet interface that communicates with the inside of the inlet longitudinal groove. The inlet interface is connected to the inner top of the liquid supply channel through an inlet connecting pipe. The outlet interface is connected to the inner top of an adjacent set of outlet channels through an outlet connecting pipe.

[0013] Through the above technical solution, two sets of compartment covers are hinged to the top of the protective compartment, and the bottom grooves are precisely fitted with the top of the lithium battery pack to ensure that the heat dissipation channel is in close contact with the top of the battery. The compartment covers have liquid outlet longitudinal grooves, liquid inlet longitudinal grooves and multiple sets of transverse grooves inside, forming a complete top heat dissipation channel network. The top channel is connected to the liquid supply channel through the liquid inlet connecting pipe, and the liquid outlet connecting pipe is connected to the liquid outlet channel, so that the coolant can flow through the top channel and directly absorb the heat from the top of the battery (heat concentration areas such as tabs and connecting plates). In conjunction with the internal core heat dissipation channel, it forms a comprehensive liquid cooling coverage for the battery, avoiding the problem of local overheating caused by excessively high top temperature.

[0014] Furthermore, the connecting mechanism includes mounting slots, and two sets of mounting slots are provided, with the two sets of mounting slots symmetrically distributed at both ends of the outer shell. One set of mounting slots has three-way solenoid valves symmetrically installed on both sides inside, which are connected to one end of the liquid outlet channel. The other set of mounting slots has two-way solenoid valves symmetrically installed on both ends inside, which are connected to the other end of the liquid outlet channel. The ports of the two sets of three-way solenoid valves that are close to each other are connected by a connecting pipe. A first liquid supply valve and a second liquid supply valve that are connected to the liquid supply channel are symmetrically installed at the middle position inside the two sets of mounting slots.

[0015] Through the above technical solution, the three-way solenoid valve, two-way solenoid valve, first liquid supply valve, second liquid supply valve and connecting pipe in the two sets of mounting slots constitute the control core. Under low load conditions, one set of two-way solenoid valves and two sets of three-way solenoid valves are opened, so that the coolant in the two sets of liquid outlet channels merges and flows back, reducing system power consumption. Under high load conditions, the two sets of two-way solenoid valves are fully open and the three-way solenoid valves are closed, so that the two sets of liquid outlet channels flow back independently, ensuring heat dissipation efficiency. The first liquid supply valve and the second liquid supply valve provide liquid supply interfaces for multi-module combination, and the connecting pipe ensures flow balance, so that the coolant distribution can be coordinated and controlled when multiple modules are combined, which is suitable for large-scale application scenarios.

[0016] Furthermore, the heat dissipation mechanism includes two sets of square through slots, which are symmetrically distributed at the middle positions on both sides of the outer casing. A fan and a filter screen are installed inside the square through slots from the inside out. Heat dissipation grooves communicating with the interior of the heat-conducting rods are symmetrically opened on both sides of the protective chamber. Several sets of "Π"-shaped heat-conducting strips are evenly installed inside the heat dissipation grooves. The interior of the heat dissipation grooves is divided into several sets of "Π"-shaped channels by the several sets of "Π"-shaped heat-conducting strips. Several sets of heat-conducting rods are installed inside the "Π"-shaped channels, and the end of the heat-conducting rod away from the heat-conducting rod extends into the interior of the liquid outlet channel. Air outlets are symmetrically opened at both ends of the bottom of the heat dissipation grooves, and exhaust vents communicating with the air outlets are symmetrically opened at both ends of the bottom sides of the outer casing.

[0017] Through the above technical solution, the heat dissipation slots on both sides of the protective chamber are divided into multiple sets of "Π"-shaped channels by "Π"-shaped heat-conducting strips. One end of the heat-conducting rod extends to the liquid outlet channel to conduct the residual heat of the coolant and the heat of the chamber wall. After the fan in the heat dissipation slot is started, the external cold air enters through the filter screen and flows along the "Π"-shaped channel, quickly carrying away the heat on the surface of the heat-conducting rod. The hot air is discharged through the air outlet and exhaust port, forming a wind-cooled circulation. This design quickly dissipates the heat absorbed by the liquid cooling system to the outside through wind cooling, avoiding the accumulation of residual heat in the coolant that affects the heat dissipation efficiency. At the same time, the filter screen prevents dust from entering the channel, ensuring the cleanliness of the heat dissipation components and extending their service life.

[0018] Furthermore, guide plates that cooperate with the exhaust vents are symmetrically installed at both ends of the bottom sides of the outer casing, and the guide plates are in an inclined state.

[0019] Through the above technical solutions, on the one hand, the inclined structure changes the direction of airflow discharge, preventing hot airflow from flowing directly back to the heat sink inlet, accelerating the exchange of hot airflow with outside cold air, and improving the efficiency of air cooling. On the other hand, when multiple modules are stacked vertically, the inclined angle of the guide plate can prevent the discharged hot air from affecting the heat dissipation of adjacent lithium battery module structures.

[0020] Furthermore, strip-shaped supports are symmetrically installed at both ends of the bottom of the outer shell, and strip-shaped slots that cooperate with the strip-shaped supports are symmetrically opened at both ends of the top of the top cover, and the depth of the strip-shaped slots is less than the height of the strip-shaped supports.

[0021] Through the above technical solution, the upper and lower modules can fit tightly together, avoiding structural shaking caused by gaps. The cooperation between the strip support and the strip slot not only restricts horizontal displacement but also disperses vertical pressure, ensuring the mechanical stability of the overall structure after stacking. At the same time, it does not affect the airflow of the exhaust vent, ensuring the normal operation of the heat dissipation system in the stacked state.

[0022] Furthermore, two sets of first fixing seats are symmetrically installed on both sides of one set of the mounting slots, and two sets of second fixing seats that cooperate with the first fixing seats are symmetrically installed on both sides of the other set of the mounting slots. The first fixing seats and the second fixing seats are fixedly connected by fixing bolts.

[0023] Through the above technical solution, when the lithium battery module structure is horizontally spliced, the outer shell and connecting mechanism of adjacent modules can be precisely aligned, avoiding coolant leakage or airflow obstruction caused by splicing gaps. At the same time, the multiple modules after fixed connection form a unified whole, dispersing the vibration stress during operation and ensuring the stability of the heat dissipation channels and electrical connections of each module.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention divides the lithium battery pack into six independent placement compartments by the cooperation of the protection mechanism and the first channel mechanism, so that each battery cell has its own heat dissipation space, avoiding heat concentration. The first channel mechanism has a liquid supply channel in the middle partition and a liquid outlet channel on both sides of the protection compartment. The first / second heat conduction pipes are evenly arranged at both ends and the bottom inner wall of the placement compartment, and the heat conduction pipes are connected to the liquid supply and liquid outlet channels. After the coolant is diverted, it directly contacts the side and bottom of the battery, efficiently absorbs the core heat and quickly discharges it. At the same time, the heat conduction plates at both ends of the placement compartment are in close contact with the first heat conduction pipe, increasing the heat conduction contact area and further improving the heat transfer efficiency, ensuring uniform and efficient internal heat dissipation; (2) The two compartment doors of the second channel mechanism of the present invention are hinged to the top of the protection compartment. The bottom groove is precisely fitted with the top of the lithium battery pack. The interior has longitudinal grooves and multiple transverse grooves to form a complete top heat dissipation channel network. The top channel is connected to the liquid supply channel and the liquid outlet channel through the connecting pipe, so that the coolant directly absorbs the heat of the top of the battery when it flows through the top channel, making up for the defect of traditional heat dissipation ignoring the top, and is connected to the internal core heat dissipation. Thermal integration achieves full-wrap cooling of the battery's "core + top", effectively avoiding local overheating and ensuring the overall temperature balance of the battery; (3) The present invention provides heat dissipation grooves on both sides of the protective compartment, and separates multiple channels by "Π"-shaped heat conduction strips. One end of the internal heat conduction rod extends to the liquid outlet channel, which can dissipate the residual heat of the coolant and the heat conducted by the battery to the compartment wall. The fan in the heat dissipation groove accelerates the dissipation of heat on the surface of the heat conduction rod. This design constructs a "liquid cooling + air cooling" synergistic heat dissipation mode, further enhancing the overall heat dissipation effect and ensuring the module's thermal management capability under different working conditions. (4) By connecting various solenoid valves and liquid supply valves in the connection mechanism, under low load conditions, only one set of two-way solenoid valves can be retained to transport coolant back to the input end of the liquid supply pump, thereby reducing the power consumption of the entire thermal management system. Under high load conditions, two sets of two-way solenoid valves can transport coolant from the two sets of outlet channels back to the input end of the liquid supply pump, thereby ensuring the cooling effect on the lithium battery. At the same time, when multiple sets of lithium battery module structures are used in combination, it can also ensure that multiple sets of lithium battery module structures can achieve a better thermal management effect through the above two working conditions. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the compartment door cover after it is opened;

[0027] Figure 3 This is a schematic diagram of the first split structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the second split structure of the present invention;

[0029] Figure 5This is a schematic diagram of the protective mechanism of the present invention;

[0030] Figure 6 This is a longitudinal cross-sectional schematic diagram of the protective compartment of the present invention;

[0031] Figure 7 This is a schematic diagram of the cross-sectional structure of the present invention;

[0032] Figure 8 This is a cross-sectional structural diagram of the compartment door cover of the present invention;

[0033] Figure 9 This is a first-view structural diagram of the outer shell of the present invention;

[0034] Figure 10 This is a second-view structural diagram of the outer shell of the present invention;

[0035] Figure 11 This is a partial structural schematic diagram of the heat dissipation mechanism of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the present invention used in a vertical combination;

[0037] Figure 13 This is a schematic diagram of the structure of the present invention when used in combination.

[0038] Figure 14 This is a schematic diagram of the structure of the present invention, which combines vertical and vertical assembly.

[0039] Figure 15 yes Figure 6 A magnified view of a portion of point A in the middle.

[0040] Reference numerals: 1. Outer shell; 2. Top cover; 3. Protective mechanism; 301. Protective chamber; 302. Middle partition; 303. Divider plate; 304. Placement chamber; 4. First channel mechanism; 401. Liquid supply channel; 402. Liquid outlet channel; 403. First heat conduction pipe; 404. Second heat conduction pipe; 405. Inner slot; 406. Heat conduction plate; 5. Second channel mechanism; 501. Chamber door cover; 502. Liquid outlet longitudinal groove; 503. Liquid inlet longitudinal groove; 504. Transverse groove; 505. Liquid outlet interface; 506. Liquid inlet interface; 507. Liquid inlet connecting pipe; 508. Liquid outlet connecting pipe; 509. Groove; 6. Connecting... 601. Connecting mechanism; 602. Three-way solenoid valve; 603. Connecting pipe; 604. Two-way solenoid valve; 605. First liquid supply valve; 606. Second liquid supply valve; 607. Mounting slot; 7. Heat dissipation mechanism; 701. Heat dissipation slot; 702. Air outlet; 703. "Π" shaped heat-conducting strip; 704. "Π" shaped channel; 705. Heat-conducting rod; 706. Fan; 707. Exhaust vent; 708. Filter screen; 709. Square through slot; 8. Lithium battery pack; 9. Inlet and outlet holes; 10. Strip support; 11. Strip slot; 12. First fixing seat; 13. Second fixing seat; 14. Fixing bolt; 15. Guide plate. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] like Figures 1-7 and Figure 15As shown, this embodiment of a lithium battery module structure with an internal thermal management channel includes a housing 1 and a lithium battery pack 8. A top cover 2 is installed on the top of the housing 1. Two sets of inlet and outlet holes 9 are symmetrically opened at the middle positions of both ends of the housing 1. A protective mechanism 3 is provided inside the housing 1. A first channel mechanism 4 for supplying coolant flow is provided in the inner wall of the protective mechanism 3. The protective mechanism 3 includes a protective chamber 301 located inside the housing 1. A partition plate 302 is installed at the middle position inside the protective chamber 301. Two sets of partition plates 303, fixedly connected to the inner wall of the protective chamber 301, are symmetrically installed on both sides of chamber 2. The interior of the protective chamber 301 is divided into six placement chambers 304 by the partition plate 302 and the partition plate 303. Each of the six placement chambers 304 contains a lithium battery pack 8. The partition plate 302 and the partition plate 303 in the protective chamber 301 separate the lithium battery pack 8 into six independent placement chambers 304 to prevent heat conduction across regions. The first channel mechanism 4 includes a liquid supply channel 401 located inside the partition plate 302. The two side walls of the protective chamber 301... Both sides of the placement chamber 304 have liquid outlet channels 402. First heat-conducting pipes 403 are evenly arranged in the inner walls of both ends of the placement chamber 304, and second heat-conducting pipes 404 are evenly arranged in the inner wall of the bottom of the placement chamber 304. One end of each of the first and second heat-conducting pipes 403 and 404 is connected to the interior of the liquid supply channel 401, and the other end is connected to the interior of the liquid outlet channel 402. Symmetrical inner slots 405 are provided at both ends of the placement chamber 304, and heat-conducting plates 406 are installed inside the inner slots 405. The inner side of the hot plate 406 is in close contact with the outer side of the first heat pipe 403. The liquid supply channel 401 in the partition 302 diverts the coolant to the first heat pipe 403 at both ends and the second heat pipe 404 at the bottom of each set of placement chambers 304. The heat generated by the lithium battery is directly transferred to the heat pipe through the side and bottom. The heat plate 406 at both ends of the placement chamber 304 is in close contact with the first heat pipe 403, which expands the heat exchange area and accelerates the heat conduction to the coolant. The coolant after absorbing heat flows out through the liquid outlet channel 402, completing the internal core heat dissipation cycle.

[0043] like Figures 5-6 and Figure 8As shown, in this embodiment, the top of the protection mechanism 3 is provided with a second channel mechanism 5 on both sides for cooling the top of the lithium battery. The second channel mechanism 5 includes a door cover 501. Two sets of door covers 501 are provided, and the two sets of door covers 501 are symmetrically hinged to the top of both sides of the protection compartment 301. The bottom of the door cover 501 is provided with a groove 509 that is adapted to the top of the lithium battery pack 8. The groove 509 fits precisely with the top of the lithium battery pack 8 to ensure that the heat dissipation channel is in close contact with the top of the battery. The two ends of the inside of the door cover 501 are symmetrically provided with an outlet longitudinal groove 502 and an inlet longitudinal groove 503. The outlet longitudinal groove 502 and the inlet longitudinal groove 503 are connected by several sets of transverse grooves 504. One side of the top end of the door cover 501 is provided with an outlet interface 505 that communicates with the inside of the outlet longitudinal groove 502. On the other side of the top end, there is an inlet port 506 that communicates with the inside of the inlet longitudinal groove 503. The inlet port 506 is connected to the inner top of the supply channel 401 through the inlet connecting pipe 507. The outlet port 505 is connected to the inner top of the adjacent set of outlet channels 402 through the outlet connecting pipe 508. Part of the coolant in the supply channel 401 enters the inlet longitudinal groove 503 of the door cover 501 through the inlet connecting pipe 507 and the inlet port 506. After flowing evenly through the network formed by multiple sets of transverse grooves 504, it fully absorbs the heat concentrated in the battery top tabs, connecting plates and other heat-concentrated areas. Then, it flows into the adjacent outlet channel 402 through the outlet longitudinal groove 502, the outlet port 505 and the outlet connecting pipe 508, and merges with the internal cooling liquid for discharge, forming a "side + bottom + top" fully enclosed liquid cooling system.

[0044] like Figure 4 , Figure 7 and Figures 9-11As shown, in this embodiment, heat dissipation mechanisms 7 that cooperate with the first channel mechanism 4 are provided on both sides of the outer shell 1. The heat dissipation mechanism 7 includes square through slots 709. Two sets of square through slots 709 are provided, and the two sets of square through slots 709 are symmetrically distributed at the middle position on both sides of the outer shell 1. A fan 706 and a filter screen 708 are respectively installed inside the square through slots 709 from the inside to the outside. Heat dissipation grooves 701 that communicate with the inside of the heat conducting rods 705 are symmetrically opened on both sides of the protective chamber 301. Several sets of "Π"-shaped heat conducting strips 703 are evenly installed inside the heat dissipation grooves 701. The inside of the heat dissipation grooves 701 is divided into several sets of "Π"-shaped channels 704 by several sets of "Π"-shaped heat conducting strips 703. Several sets of heat conducting rods 705 are installed inside the "Π"-shaped channels 704, and the end of the heat conducting rod 705 away from the square through slot 709 extends into the liquid outlet channel 402. The heat dissipation slot 701 has symmetrical air outlets 702 at both ends of its bottom. The outer casing 1 has symmetrical exhaust vents 707 at both ends of its bottom sides, which are connected to the air outlets 702. The heat dissipation slots 701 on both sides of the protective compartment 301 are divided into multiple sets of "Π"-shaped channels 704 by "Π"-shaped heat-conducting strips 703. One end of the heat-conducting rod 705 extends into the liquid outlet channel 402 to conduct the residual heat absorbed by the coolant and the heat conducted by the battery to the compartment wall. After the fan 706 is turned on, the external cold air enters the "Π"-shaped channel 704 after being filtered by the filter screen 708. It comes into full contact with the heat-conducting rod 705 and quickly removes the surface heat. The hot air is discharged through the air outlets 702 at the bottom of the heat dissipation slot 701 and the exhaust vents 707 of the outer casing 1, forming a wind-cooling cycle that continuously reduces the coolant temperature. Through the synergistic mode of "liquid cooling heat absorption + wind cooling heat dissipation", the overall heat dissipation effect is enhanced.

[0045] like Figure 4 , Figure 7 and Figure 9As shown, in this embodiment, the outer shell 1 is provided with connecting mechanisms 6 at both ends, which cooperate with the first channel mechanism 4. The connecting mechanism 6 includes mounting grooves 606, and there are two sets of mounting grooves 606, which are symmetrically distributed at both ends of the outer shell 1. Three-way solenoid valves 601 that communicate with one end of the liquid outlet channel 402 are symmetrically installed on both sides inside one set of mounting grooves 606. Two-way solenoid valves 603 that communicate with the other end of the liquid outlet channel 402 are symmetrically installed on both ends inside the other set of mounting grooves 606. The ports of the two sets of three-way solenoid valves 601 that are close to each other are connected by a connecting pipe 602. A first liquid supply channel 401 that communicates with the liquid supply channel 401 is symmetrically installed at the middle position inside the two sets of mounting grooves 606. Valve 604 and the second liquid supply valve 605 connect the first liquid supply valve 604 to the output end of the liquid supply pump, and two sets of two-way solenoid valves 603 connect to the input end of the liquid supply pump. Under low load conditions, one set of two-way solenoid valves 603 and two sets of three-way solenoid valves 601 are opened, and the coolant in the two sets of outlet channels 402 flows back after converging through the connecting pipe 602, reducing system power consumption. Under high load conditions, the two sets of two-way solenoid valves 603 are fully open and the three-way solenoid valves 601 are disconnected, and the two sets of outlet channels flow back independently, ensuring maximum heat dissipation flow. When multiple modules are combined, the first liquid supply valve 604 and the second liquid supply valve 605 are used to distribute the liquid supply and coordinate the heat dissipation rhythm of each module. The combination of valves enables flexible switching of coolant circulation to adapt to different operating conditions.

[0046] like Figure 10 and Figures 13-14 As shown, strip supports 10 are symmetrically installed at both ends of the bottom of the outer shell 1 in this embodiment, and strip slots 11 that cooperate with the strip supports 10 are symmetrically opened at both ends of the top of the top cover 2. The depth of the strip slots 11 is less than the height of the strip supports 10, ensuring that the upper and lower modules fit tightly when stacked. During the stacking process, the strip supports and strip slots form a positioning guide, while dispersing the pressure in the vertical direction to avoid module deformation. At the same time, the exhaust port 707 is not blocked, ensuring normal airflow of the air-cooled air.

[0047] like Figure 12 and Figure 14As shown, in this embodiment, two sets of first fixing seats 12 are symmetrically installed on both sides of one set of mounting slots 606, and two sets of second fixing seats 13 that cooperate with the first fixing seats 12 are symmetrically installed on both sides of another set of mounting slots 606. The first fixing seats 12 and the second fixing seats 13 are fixedly connected by fixing bolts 14. When multiple modules are horizontally spliced, the first fixing seats 12 in one set of mounting slots 606 are aligned with the second fixing seats 13 of another module and locked by fixing bolts 14 to form a rigid connection. After fixing, the outer shell 1 and connecting mechanism 6 of adjacent modules are precisely aligned, and the liquid outlet channel 402 and liquid supply channel 401 are connected through the connecting mechanism to ensure smooth circulation of coolant. At this time, the first The second liquid supply valve 605 of the first module is connected to the first liquid supply valve 604 of the second module through a conduit, realizing the series / parallel connection of the liquid supply channels of multiple modules. The three-way solenoid valve 601 of the first module is connected to the two-way solenoid valve 603 of the corresponding position of the second module through a conduit. At this time, the two sets of three-way solenoid valves 601 on the first module are not connected to each other, but the two sets of liquid outlet channels 402 on the same side of the first and second modules are connected through the three-way solenoid valve 601, the conduit and the two-way solenoid valve 603. At the same time, the two sets of three-way solenoid valves 601 on the second module are connected to each other through the connecting pipe 602. Through the coordinated control of the three-way solenoid valve 601 and the two-way solenoid valve 603, the overall coolant distribution is ensured to be uniform.

[0048] The working principle of this embodiment is as follows: First, the first liquid supply valve 604 is connected to the output end of the liquid supply pump through a conduit. Two sets of two-way solenoid valves 603 are connected to the input end of the liquid supply pump through conduits. Coolant enters the liquid supply channel 401 within the partition 302 through the first liquid supply valve 604, and is then evenly distributed to the first heat-conducting pipes 403 at both ends and the second heat-conducting pipe 404 at the bottom of the six sets of placement chambers 304. The heat generated by the lithium battery pack 8 during operation within the placement chamber 304 is directly transferred to the heat-conducting pipes through the sides and bottom of the lithium battery pack 8, absorbing the heat. The coolant flows along the heat pipes into the outlet channels 402 on both sides of the protective compartment 301. Simultaneously, some coolant in the supply channels 401 enters the inlet longitudinal groove 503 of the compartment door 501 through the inlet connecting pipe 507 and inlet interface 506. It flows evenly through a network of channels formed by multiple transverse grooves 504, fully contacting the top of the battery that is in contact with the groove of the compartment door 509. After absorbing heat from the top, it flows through the outlet longitudinal groove 502, outlet interface 505, and outlet connecting pipe 508 into the adjacent outlet channel 402. The coolant in the outlet channel 402 absorbs heat... A certain amount of coolant, some of its residual heat is conducted to the heat dissipation slots 701 on both sides of the protective chamber 301 through the heat conduction rods 705 extending into the channel. Then, the fan 706 in the heat dissipation slots 701 is turned on, and external cold air enters through the filter screen 708 and flows along the "Π"-shaped channel 704 separated by the "Π"-shaped heat conduction strips 703, carrying away the residual heat on the surface of the heat conduction rods 705, and finally being discharged to the outside environment through the air outlet 702 and the exhaust port 707. Under low load conditions (the fan 706 can be turned on or off), only one set of two-way solenoid valves 603 is opened. The system opens two sets of three-way solenoid valves 601, allowing the coolant in one set of outlet channels 402 to enter the other set of outlet channels 402 through the two sets of three-way solenoid valves 601 and the connecting pipe 602. Then, the coolant returns to the input end of the supply pump through a set of two-way solenoid valves 603. Under high load conditions (when the fan 706 is on), the two sets of two-way solenoid valves 603 open simultaneously (the two sets of three-way solenoid valves 601 are not connected to each other). At this time, the coolant in the two sets of outlet channels 402 returns to the input end of the supply pump through their respective connected two-way solenoid valves 603.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A lithium battery module structure with an internal thermal management channel, comprising a housing (1) and a lithium battery pack (8), wherein a top cover (2) is mounted on the top of the housing (1), and two sets of inlet and outlet holes (9) are symmetrically opened at the middle positions of both ends of the housing (1), characterized in that: The outer casing (1) is provided with a protective mechanism (3). The inner wall of the protective mechanism (3) is provided with a first channel mechanism (4) for the flow of coolant. The two sides of the top of the protective mechanism (3) are provided with a second channel mechanism (5) for cooling the top of the lithium battery. The two ends of the outer casing (1) are provided with a connecting mechanism (6) that cooperates with the first channel mechanism (4). The two sides of the outer casing (1) are provided with a heat dissipation mechanism (7) that cooperates with the first channel mechanism (4).

2. The lithium battery module structure with an internal thermal management channel according to claim 1, characterized in that, The protection mechanism (3) includes a protection compartment (301) located inside the outer shell (1). A partition (302) is installed in the middle of the protection compartment (301), and two sets of partitions (303) fixedly connected to the inner wall of the protection compartment (301) are symmetrically installed on both sides of the partition (302). The interior of the protection compartment (301) is divided into six sets of placement compartments (304) by the partition (302) and the partitions (303). Each of the six sets of placement compartments (304) is equipped with a lithium battery pack (8).

3. The lithium battery module structure with an internal thermal management channel according to claim 2, characterized in that, The first channel mechanism (4) includes a liquid supply channel (401) located inside the partition plate (302), and liquid outlet channels (402) are provided inside both sides of the protective chamber (301). First heat conduction pipes (403) are evenly arranged in the inner walls at both ends of the placement chamber (304), and second heat conduction pipes (404) are evenly arranged in the inner wall at the bottom of the placement chamber (304). One end of the first heat conduction pipe (403) and the second heat conduction pipe (404) is connected to the interior of the liquid supply channel (401), and the other end of the first heat conduction pipe (403) and the second heat conduction pipe (404) is connected to the interior of the liquid outlet channel (402).

4. The lithium battery module structure with internal thermal management channels according to claim 3, characterized in that, The inner ends of the placement chamber (304) are symmetrically provided with inner slots (405), and a heat-conducting plate (406) is installed inside the inner slot (405). The inner side of the heat-conducting plate (406) is in close contact with the outer side of the first heat-conducting pipe (403).

5. The lithium battery module structure with an internal thermal management channel according to claim 3, characterized in that, The second channel mechanism (5) includes a door cover (501), which has two sets, and the two sets of door covers (501) are symmetrically hinged to the top of both sides of the protective compartment (301). The bottom of the door cover (501) is provided with a groove (509) that matches the top of the lithium battery pack (8). The two ends of the inside of the door cover (501) are symmetrically provided with an outlet longitudinal groove (502) and an inlet longitudinal groove (503). The outlet longitudinal groove (502) and the inlet longitudinal groove (503) are connected by several sets of transverse grooves (509). 4) Connecting: One side of the top end of the silo cover (501) is equipped with a liquid outlet interface (505) that communicates with the inside of the liquid outlet longitudinal channel (502). The other side of the top end of the silo cover (501) is equipped with a liquid inlet interface (506) that communicates with the inside of the liquid inlet longitudinal channel (503). The liquid inlet interface (506) is connected to the inner top of the liquid supply channel (401) through a liquid inlet connecting pipe (507). The liquid outlet interface (505) is connected to the inner top of an adjacent set of liquid outlet channels (402) through a liquid outlet connecting pipe (508).

6. The lithium battery module structure with an internal thermal management channel according to claim 3, characterized in that, The connecting mechanism (6) includes a mounting groove (606), which is provided in two sets and is symmetrically distributed at both ends of the outer shell (1). A three-way solenoid valve (601) communicating with one end of the liquid outlet channel (402) is symmetrically installed on both sides of the inside of one set of mounting grooves (606). A two-way solenoid valve (603) communicating with the other end of the liquid outlet channel (402) is symmetrically installed at both ends of the other set of mounting grooves (606). The ports of the two sets of three-way solenoid valves (601) are connected to each other through a connecting pipe (602). A first liquid supply valve (604) and a second liquid supply valve (605) communicating with the inside of the liquid supply channel (401) are symmetrically installed at the middle position inside the two sets of mounting grooves (606).

7. The lithium battery module structure with an internal thermal management channel according to claim 3, characterized in that, The heat dissipation mechanism (7) includes two sets of square through slots (709), which are symmetrically distributed at the middle positions on both sides of the outer casing (1). A fan (706) and a filter (708) are installed inside each square through slot (709) from the inside out. The protective chamber (301) has symmetrically opened heat dissipation grooves (701) communicating with the interior of the heat-conducting rod (705) on both sides. Several sets of "Π"-shaped heat-conducting strips (703) are evenly installed inside each heat dissipation groove (701). The interior of the heat sink (701) is divided into several sets of "Π"-shaped channels (704) by several sets of "Π"-shaped heat-conducting strips (703). Several sets of heat-conducting rods (705) are installed inside the "Π"-shaped channels (704), and one end of the heat-conducting rod (705) away from the heat-conducting rod (705) extends into the interior of the liquid outlet channel (402). Air outlets (702) are symmetrically opened at both ends of the bottom of the heat sink (701), and exhaust vents (707) communicating with the air outlets (702) are symmetrically opened at both ends of the bottom sides of the outer shell (1).

8. The lithium battery module structure with an internal thermal management channel according to claim 7, characterized in that, The bottom two ends of the outer shell (1) are symmetrically equipped with guide plates (15) that cooperate with the exhaust port (707), and the guide plates (15) are inclined.

9. The lithium battery module structure with an internal thermal management channel according to claim 8, characterized in that, The bottom of the outer shell (1) is symmetrically equipped with strip supports (10) at both ends, and the top of the top cover (2) is symmetrically provided with strip slots (11) that cooperate with the strip supports (10) at both ends, and the depth of the strip slots (11) is less than the height of the strip supports (10).

10. The lithium battery module structure with an internal thermal management channel according to claim 6, characterized in that, Two sets of first fixing seats (12) are symmetrically installed on both sides inside one set of the mounting groove (606), and two sets of second fixing seats (13) that cooperate with the first fixing seats (12) are symmetrically installed on both sides inside the other set of the mounting groove (606). The first fixing seats (12) and the second fixing seats (13) are fixedly connected by fixing bolts (14).

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