Battery plug-in box, battery pack and electric equipment

Abstract

The invention relates to a battery plug-in box, a battery pack and electric equipment, and relates to the technical field of batteries, and the battery plug-in box comprises a heat exchange plate, an enclosure frame and a box cover. The heat exchange plate is provided with a heat exchange surface, and the heat exchange surface is directly attached to the battery cell and is used for realizing efficient heat conduction; the enclosure frame is fixed on the heat exchange surface, and an inner ring of the enclosure frame forms a containing cavity, so that the battery cell is stably placed; the box cover is buckled with the enclosure frame, and a closed mounting space is defined by the box cover and the heat exchange plate, so that the battery cells are stored and protected. According to the battery subrack, stable torque resistance can be provided for the heat exchange plates under the condition that only the enclosure frame is added, and meanwhile, reliable fixation of the battery cells under the working conditions of vibration, impact and the like can be ensured, so that the structural strength is improved while the weight of the battery subrack is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery box, battery pack and electrical equipment. Background Technology

[0002] Currently, in existing energy storage systems, lithium-ion battery packs have a large overall area, so additional reinforcing components are often needed during manufacturing to ensure structural strength. However, this inevitably leads to a significant increase in the overall weight of the pack, causing inconvenience during use and transportation. If lightweighting is attempted by reducing the number of reinforcing components or thinning the structure, the overall strength of the pack will decrease, making it difficult to meet the safety and reliability requirements of energy storage systems under long-term operation and complex working conditions. Summary of the Invention

[0003] This application provides a battery box, battery pack, and electrical device to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a battery compartment is provided, comprising: A heat exchange plate having a heat exchange surface configured to be in contact with a battery cell; Enclosure frame, connected to the heat exchange surface; and, The cover is connected to the side of the enclosure frame away from the heat exchange surface and is configured to, together with the enclosure frame and the heat exchange plate, enclose an installation space for storing the power supply core.

[0005] By adopting the above technical solution, the battery pack consists of a heat exchange plate, an enclosure frame, and a cover, forming a complete installation space. The heat exchange surface of the heat exchange plate is directly in contact with the battery cell, achieving efficient heat dissipation and preventing the battery cell from being affected by heat accumulation, which could impact its lifespan or safety. The enclosure frame, combined with the heat exchange plate, provides stable torque resistance to the heat exchange plate and ensures reliable fixation of the battery cell under vibration, impact, and other operating conditions. The cover further encloses the battery pack to form a sealed cavity, which is dustproof, moisture-proof, and improves overall environmental adaptability. Therefore, the enclosure frame not only ensures the lightweight structure of the battery pack but also increases the torque resistance of the heat exchange plate.

[0006] In one embodiment, the enclosure frame includes an enclosure side beam connected to the long edge of the heat exchange surface along the length of the heat exchange plate.

[0007] By adopting the above technical solution, the enclosure frame is arranged along the long side of the heat exchange plate through the enclosure side beams to form a longitudinal load-bearing unit, which can effectively resist the bending and deformation of the plug box in the length direction; at the same time, the combination of the side beams and the heat exchange plate enhances the overall rigidity, so that the plug box has good bending resistance while ensuring lightweight, and reduces the risk of structural deformation during transportation and installation.

[0008] In one embodiment, the enclosure frame further includes an enclosure end beam, and the enclosure end beam is connected to the wide side edge of the heat exchange surface along the width direction of the heat exchange plate.

[0009] By adopting the above technical solution, the enclosure frame is provided with an additional enclosure end beam and arranged along the width direction, and together with the enclosure side beam, forms a rectangular ring-shaped support structure, which can evenly distribute loads in both the long side and short side directions of the heat exchange plate, improve the overall compressive and torsional resistance of the plug-in box, and further enhance the stability of the heat exchange plate and the battery cell under impacts in different directions.

[0010] In one embodiment, the enclosure side beam and the enclosure end beam are perpendicularly connected and are both hollow.

[0011] By adopting the above technical solution, the enclosure side beam and the enclosure end beam are perpendicularly connected and are hollow, not only forming a closed ring-shaped skeleton, significantly enhancing the overall bearing strength and torsional stiffness of the plug-in box, but also reducing the material consumption while ensuring the strength by the hollow structure, achieving weight reduction, and taking into account the requirements of structural lightweight and high strength.

[0012] In one embodiment, the enclosure side beam and the enclosure end beam are welded together by gas shielded welding.

[0013] By adopting the above technical solution, the enclosure side beam and the end beam are welded by gas shielded welding, and the welding points are at the four joint vertices. The welding quality is stable and reliable, which can ensure the structural strength and sealing performance of the joint, effectively prevent cracking or loosening caused by stress concentration; at the same time, the welding process is suitable for mass production, ensuring product consistency and manufacturability.

[0014] In one embodiment, the cross-sectional shape of at least one of the enclosure side beam and the enclosure end beam is "day" shaped.

[0015] The cross-section of the side beam and the end beam adopts a "day" shaped rolled beam structure, while maintaining higher bending stiffness and torsional resistance; its cross-sectional area is reasonably distributed, the ratio of flange to web is optimized, and it has a higher stiffness / weight ratio, thus achieving the unity of lightweight design and structural strength improvement.

[0016] In one embodiment, the heat exchange plate is provided with a water inlet nozzle and a water outlet nozzle, and an external connection surface is formed between the enclosure end beam and the wide side edge of the heat exchange surface, and both the water inlet nozzle and the water outlet nozzle are located on the external connection surface.

[0017] By adopting the above technical solution, the heat exchange plate is equipped with inlet and outlet nozzles, which are arranged on the external interface formed between the end beam and the wide edge of the enclosure. This makes the liquid cooling pipe interface uniformly external, which facilitates quick connection with the external cooling system and improves assembly efficiency. The external arrangement avoids direct interference between the pipe interface and the battery cell, enhances sealing and safety, and makes the cooling medium flow more evenly, ensuring the stable performance of the battery cell's heat dissipation.

[0018] In one embodiment, a fixed crossbeam is connected to the heat exchange surface of the heat exchange plate, and the length direction of the fixed crossbeam is consistent with the length direction of the enclosure end beam.

[0019] By adopting the above technical solution, the setting of the fixed crossbeam can further improve the strength of the heat exchange plate, thereby improving the torsional and bending resistance of the heat exchange plate.

[0020] In one embodiment, the heat exchange plate includes a flow channel plate, the flow channel plate comprising: plate body; At least two loop-shaped flow channels are provided in parallel on the plate. Both the inlet and outlet channels are located on the plate and connected to the plurality of loop channels. The inlet channel is configured to guide the cooling medium to flow into the plurality of loop channels after being diverted, and the outlet channel is configured to collect the cooling medium flowing out of the plurality of loop channels.

[0021] By adopting the above technical solution, the flow channel plate has at least two parallel loop-shaped flow channels on the plate body, and the inlet flow channel and outlet flow channel respectively realize flow splitting and merging, so that the cooling medium can uniformly enter and flow out of multiple loop-shaped flow channels. This not only improves the uniformity of cooling medium distribution in the loop-shaped flow channels, but also avoids the problem of temperature difference accumulation caused by a single path through the parallel design, thereby significantly improving the temperature control accuracy and heat dissipation efficiency of the heat exchange plate and ensuring a more balanced temperature distribution inside the battery pack.

[0022] In one embodiment, the loop-shaped flow channel includes an inlet section and an outlet section that are connected to each other. The end of the inlet section away from the outlet section is connected to the liquid inlet channel, and the end of the outlet section away from the inlet section is connected to the liquid outlet channel.

[0023] By adopting the above technical solution, the U-shaped flow channel features an inlet and outlet flow section, with the inlet channel connected to the inlet flow section and the outlet flow section connected to the outlet flow channel. This structure allows the coolant to enter and exit via a shorter path, reducing flow resistance and improving circulation efficiency. Simultaneously, the regular flow path reduces fluid turbulence and the risk of localized overheating, thus enhancing the heat exchange stability of the heat exchange plate.

[0024] In one embodiment, the inlet flow section is a counterclockwise flow channel, and the inlet flow section includes multiple continuously shrinking counterclockwise sub-flow channels; the outlet flow section is a clockwise flow channel, and the outlet flow section includes multiple continuously enlarging clockwise sub-flow channels. Alternatively, the inflow section is a clockwise flow channel, and the inflow section includes multiple continuously shrinking clockwise sub-flow channels, and the outflow section is a counterclockwise flow channel, and the outflow section includes multiple continuously enlarging counterclockwise sub-flow channels.

[0025] By adopting the above technical solution, the clockwise and counterclockwise flow channels can be rationally distributed on the plate using a limited area, thereby further improving the heat exchange effect of the liquid cooling plate.

[0026] In one embodiment, the inlet flow section and the outlet flow section are arranged alternately layer by layer along the thickness of the plate.

[0027] By adopting the above technical solution, the inlet and outlet flow sections are arranged in an alternating manner in the thickness direction, which can achieve a more compact flow channel layout in a limited space, increase the heat exchange area, and at the same time, the alternating structure can effectively improve the uniformity of the coolant flow path.

[0028] In one embodiment, the connecting portion between the inlet section and the outlet section is S-shaped; or, the connecting portion between the inlet section and the outlet section is U-shaped.

[0029] By adopting the above technical solution, not only can the refrigerant be guided through the interior of the loop channel in a more complex path, but the refrigerant can also be tumbled, stirred and disturbed during the flow process, thereby disrupting the gas-liquid stratification state, improving the mixing degree and phase change efficiency, and enhancing the heat exchange performance of the loop channel.

[0030] In one embodiment, the liquid inlet channel is provided with a first dividing part, which divides the liquid inlet channel into a first liquid inlet branch and a second liquid inlet branch.

[0031] By adopting the above technical solution, a first partition is set in the liquid inlet channel to divide it into a liquid inlet branch and a liquid inlet branch. This helps to evenly distribute the incoming coolant and avoid the problem of excessive or insufficient flow on one side. This ensures the consistency of coolant supply to multiple loop channels and improves the uniformity of temperature control.

[0032] In one embodiment, the liquid outlet channel is provided with a second dividing part, which divides the liquid outlet channel into a liquid outlet branch and a liquid outlet second branch.

[0033] By adopting the above technical solution, a second partition is set in the outlet channel, dividing it into one outlet branch and two outlet branches. This enables the orderly convergence of coolant and avoids mutual interference when multiple loop channels return coolant. This stabilizes the outlet flow rate and reduces flow fluctuations, ensuring a more uniform outlet temperature in the system.

[0034] In one embodiment, the liquid inlet branch is parallel to the liquid inlet second branch and has the same width; and / or, the liquid outlet branch is parallel to the liquid outlet second branch and has the same width.

[0035] By adopting the above technical solution, the inlet and outlet branches are arranged in parallel with the same width, which further balances the flow resistance and makes the flow distribution of each branch more stable. This symmetrical design effectively improves the uniformity of coolant distribution and collection, thereby reducing local cell temperature differences.

[0036] In one embodiment, the loop-shaped flow channel is provided with a plurality of support portions, which are spaced apart along the extension direction of the loop-shaped flow channel.

[0037] By adopting the above technical solution, multiple support parts are arranged at intervals along the extension direction in the loop-shaped flow channel, which can not only improve the structural strength of the plate after brazing and prevent the plate from bulging or deforming due to coolant pressure, but also play a fluid guiding role, making the coolant more stable and uniform in the loop-shaped flow channel.

[0038] In one embodiment, the plurality of supports divide at least two sub-branches within the loop-shaped flow channel, and the at least two sub-branches are parallel and have the same width.

[0039] By adopting the above technical solution, the support section divides the flow channel into at least two parallel sub-branches of the same width, allowing the coolant to be distributed and flow in more detailed channels, increasing the flow contact area. This multi-sub-branchose-path design significantly improves heat dissipation and reduces pressure drop, thereby increasing the utilization rate of the cooling medium.

[0040] In one embodiment, at least one of the multiple corners of the loop channel is a rounded transition.

[0041] By adopting the above technical solution, rounded corners are incorporated at the bends of the loop-shaped flow channel, effectively preventing turbulence and localized heat buildup caused by sudden changes in coolant flow velocity at sharp corners. The rounded corner design effectively reduces pressure drop loss and improves the stability and long-term reliability of coolant flow.

[0042] In one embodiment, a reinforcing part is provided at the connection between the liquid inlet channel and the liquid outlet section; and / or, a reinforcing part is provided at the connection between the liquid outlet channel and the liquid outlet section.

[0043] By adopting the above technical solution, reinforcement parts are added at the connection between the liquid inlet channel and the liquid outlet channel and the liquid outlet channel, which can significantly improve the structural strength of key nodes, prevent fatigue cracks or leakage caused by long-term hot and cold cycles or fluid impact, and extend the overall service life of the heat exchange plate.

[0044] In one embodiment, the reinforcing portion is spaced apart from the first partition portion, the second partition portion, and the supporting portion.

[0045] By adopting the above technical solution, the reinforcement, partition, and support sections are arranged at intervals, avoiding structural overlap that could cause localized stress concentration, resulting in a more balanced overall layout. This method enhances the strength of the flow channel plate without affecting the normal flow path of the coolant, thus balancing structural reliability and heat dissipation performance.

[0046] According to a second aspect of this application, a heat exchange plate is provided, comprising the flow channel plate described in the first aspect.

[0047] In one embodiment, a flat plate is further included, which is connected to the plate body to cover the loop channel, the inlet channel and the outlet channel.

[0048] By adopting the above technical solution, the heat exchange plate further includes a flat plate with flow channel grooves that cooperate with the flow channel plate to define a loop-shaped flow channel. The combination of the flat plate and the flow channel plate forms a closed cavity, making the fluid channel forming simple and reliable, and facilitating the precise machining and assembly of complex flow channels.

[0049] In one embodiment, the flat plate and the flow channel plate are brazed together.

[0050] By adopting the above technical solution, the flat plate and the flow channel plate are connected by brazing. The brazing filler metal is used to achieve a metallurgical bond at a temperature below the melting point of the base material, ensuring a dense and strong bonding interface. This method not only improves the sealing reliability of the heat exchange plate but also, to a certain extent, avoids the adverse effects of high-temperature welding on material properties.

[0051] In one embodiment, both the flat plate and the flow channel plate are provided with a plurality of brazing overflow holes.

[0052] By adopting the above technical solution, multiple brazing overflow holes are opened on both the flat plate and the flow channel plate, which can discharge excess solder and gas during the welding process, avoid weld defects, and ensure stable welding quality. This design improves welding reliability and consistency in mass production.

[0053] In one embodiment, the water inlet of the heat exchange plate is connected to the liquid inlet channel, and the water outlet of the heat exchange plate is connected to the liquid outlet channel.

[0054] By adopting the above technical solution, the water inlet nozzle can facilitate the connection between the liquid inlet channel and the external cooling medium source, and the water outlet nozzle can facilitate the connection between the liquid outlet channel and the external cooling medium storage source, thereby facilitating the circulation of the cooling medium.

[0055] In one embodiment, the heat exchange plate further includes a support structure connected to the lower surface of the flow channel plate, the support structure comprising: Supporting framework; The main supporting beam is mounted on the supporting frame; A support member is provided on the main support beam. The support member is configured to abut against the flow channel plate and avoid the loop flow channel, liquid inlet flow channel and liquid outlet flow channel of the flow channel plate. The loop flow channel, liquid inlet flow channel and liquid outlet flow channel together form a cooling flow channel.

[0056] By adopting the above technical solution and through the coordinated design of the support frame, main support beam, and support components, the overall rigidity and stability of the liquid cooling plate are enhanced. This structure can effectively distribute the load, avoid deformation or damage caused by local stress concentration, and at the same time, the support components avoid the cooling channels, preventing the cooling channels of the flow plate from being deformed under pressure, thus improving the reliability and service life of the liquid cooling plate.

[0057] In one embodiment, the supporting main beam includes supporting crossbeams, and multiple supporting crossbeams are provided along the length direction of the supporting frame, and the length direction of the supporting crossbeams is consistent with the width direction of the supporting frame.

[0058] By adopting the above technical solution, the support strength of the convection channel plate along the width direction of the support frame is improved by supporting the crossbeam.

[0059] In one embodiment, the support beam includes a first beam that passes through the centerline of the frame support frame along its length.

[0060] By adopting the above technical solution, the first crossbeam is set along the central axis of the support frame, which enhances the symmetry and stability of the structure, helps to evenly transfer and distribute the load, reduces the torsion or deformation caused by asymmetrical support, and improves the overall rigidity and bending resistance.

[0061] In one embodiment, the supporting main beam further includes a supporting longitudinal beam, which is connected to the supporting frame and the plurality of supporting crossbeams, and the length direction of the supporting longitudinal beam is consistent with the length direction of the supporting frame.

[0062] By adopting the above technical solution, the support strength of the convection channel plate along the length of the support frame is improved by supporting the longitudinal beam.

[0063] In one embodiment, a limiting member is further included, wherein multiple limiting members are provided on the supporting crossbeam and the supporting longitudinal beam, and are used to limit the relative position of the supporting longitudinal beam and the supporting crossbeam.

[0064] By adopting the above technical solution, the positions of the supporting longitudinal beams and supporting transverse beams can be limited by the limiting components, which makes the installation stability of the supporting transverse beams and supporting longitudinal beams on the supporting frame higher.

[0065] In one embodiment, the limiting member includes a first limiting part, at least two of which are spaced apart on the first crossbeam, forming a first installation gap between adjacent first limiting parts, and the supporting longitudinal beam is installed in the first installation gap.

[0066] By adopting the above technical solution, the first installation gap formed by the first limiting part cooperates with the supporting longitudinal beam, achieving precise positioning and fixation of the supporting longitudinal beam and preventing its displacement under stress. The first limiting part also serves as a support, avoiding the flow channel, thus enhancing structural stability and protecting the integrity of the flow channel.

[0067] In one embodiment, the first limiting portion is configured to abut against the flow channel plate and avoid the cooling flow channel of the flow channel plate.

[0068] By adopting the above technical solution, the deformation of the flow channel plate caused by the compression of the cooling channel by the first limiting part can be prevented to a certain extent.

[0069] In one embodiment, a plurality of transverse reinforcing ribs are provided on the first crossbeam along the length direction of the first crossbeam. The transverse reinforcing ribs are staggered from the first limiting part and avoid the first installation gap.

[0070] By adopting the above technical solution, the transverse stiffeners are staggered and avoid the first installation gap, significantly enhancing the bending stiffness and torsional performance of the first crossbeam. Simultaneously, interference with the installation of the supporting longitudinal beams is avoided, ensuring structural strength without affecting assembly accuracy. In one embodiment, the supporting longitudinal beam is provided with a limiting groove, which is configured to be limited and fitted with the first limiting part.

[0071] By adopting the above technical solution, a limiting groove is set on the supporting longitudinal beam to fit into the first limiting part, thereby achieving longitudinal limiting and preventing longitudinal displacement of the supporting longitudinal beam during use, thus improving the stability of the structure and the assembly accuracy.

[0072] In one embodiment, the supporting longitudinal beam is further provided with longitudinal reinforcing ribs along the length direction of the supporting longitudinal beam.

[0073] By adopting the above technical solution, longitudinal stiffeners are set on the supporting beams, which enhances their longitudinal bending stiffness, effectively suppresses deformation under load, and improves the overall load-bearing capacity and stability of the structure.

[0074] In one embodiment, the supporting beam further includes a second beam, which is located on the supporting frame, and multiple second beams are provided parallel to each other on both sides of the first beam.

[0075] By adopting the above technical solution and setting a second crossbeam, additional support is provided for the supporting longitudinal beams, which enhances the lateral stiffness and integrity of the frame and prevents structural loosening caused by vibration or impact.

[0076] In one embodiment, the limiting member further includes a second limiting part, which is provided on the supporting longitudinal beam in a plurality of manner, and is configured to cooperate with the second crossbeam in a limiting manner.

[0077] By adopting the above technical solution and setting a second limiting part, additional limiting of the supporting longitudinal beam is achieved, which enhances the connection stability between the supporting longitudinal beam and the second cross beam and avoids structural loosening caused by vibration or impact.

[0078] In one embodiment, a second mounting gap is provided on the second crossbeam along the length direction of the second crossbeam, and the second limiting part is embedded in the second mounting gap.

[0079] By adopting the above technical solution, the fitting design of the second limiting part and the second installation gap enables the rapid positioning and stable installation of the second crossbeam, improving assembly efficiency and structural reliability.

[0080] In one embodiment, the second limiting portion is configured as a protrusion formed on the side of the support longitudinal beam facing away from the flow channel plate.

[0081] By adopting the above technical solution, it is easier to form the second limiting part, while reducing the weight of the supporting longitudinal beam.

[0082] In one embodiment, the support member includes a first support portion, which is provided on the support crossbeam and the support longitudinal beam in a plurality of manner. The first support portion is configured to abut against the surface of the flow channel plate after bypassing the cooling flow channel.

[0083] By adopting the above technical solution, the design of the first support part avoids the cooling channel while contacting the surface of the channel plate, providing uniform and stable support, avoiding the risk of damage or leakage caused by the channel plate being deformed under pressure or stress concentration, and improving the reliability and lifespan of heat dissipation.

[0084] In one embodiment, the first support portion provided on the support cross beam is a protrusion protruding from the support cross beam toward the side close to the flow channel plate; and / or, the first support portion provided on the support longitudinal beam is a protrusion protruding from the support longitudinal beam toward the side close to the flow channel plate.

[0085] By adopting the above technical solution, it is disclosed that the first support portion is formed by a part of the support longitudinal beam or a part of the support cross beam, so as to reduce the weight of the support longitudinal beam or the support cross beam.

[0086] In one embodiment, the support member includes a second support portion, the length direction of the second support portion is perpendicular to the length direction of the second cross beam, and the second support portion is configured to abut against the plate surface of the flow channel plate after avoiding the cooling flow channel.

[0087] By adopting the above technical solution, the design of the second support portion abuts against the plate surface of the flow channel plate while avoiding the cooling flow channel, providing uniform and stable support, avoiding damage or leakage risks caused by the deformation or stress concentration of the flow channel plate due to pressure, and improving the heat dissipation reliability and life.

[0088] In one embodiment, the support cross beam further includes a third cross beam, the third cross beam is provided at a position close to the frame edge of the support frame, a fitting groove is provided on the third cross beam, and the end of the support longitudinal beam is fitted and limited in the fitting groove.

[0089] By adopting the above technical solution, the design of the third cross beam and its fitting groove realizes the limit fixation of the end of the support longitudinal beam, enhancing the structural integrity of the edge of the support frame.

[0090] In one embodiment, the cross-sectional shapes of the third cross beam and the second cross beam are both "U" shaped.

[0091] By adopting the above technical solution, the "U" shaped cross section improves the bending stiffness and torsional resistance of the third cross beam and the second cross beam, and at the same time realizes lightweight.

[0092] In one embodiment, both the third cross beam and the second cross beam are corrugated stamping formed structures.

[0093] By adopting the above technical solution, the corrugated stamping further improves the bending stiffness and torsional resistance of the third cross beam and the second cross beam, and at the same time realizes lightweight.

[0094] In one embodiment, the support frame includes a roll-formed side beam and a roll-formed end beam, the roll-formed side beam and the roll-formed end beam are perpendicularly connected to each other, the length direction of the support cross beam is consistent with the length direction of the roll-formed end beam, and the length direction of the support longitudinal beam is consistent with the length direction of the roll-formed side beam.

[0095] By adopting the above technical solution, the support frame is orthogonally composed of a roll-formed side beam and a roll-formed end beam, and the cross beam and the end beam, as well as the longitudinal beam and the side beam, are in the same length direction, with clear force flow transmission, and the overall torsional stiffness and dimensional consistency are improved.

[0096] In one embodiment, the support frame further includes a supporting plate, which is arranged on the roll-formed side beam along the length direction of the roll-formed side beam, and the ends of the roll-formed end beam and the ends of multiple support cross beams are connected to the upper surface of the supporting plate.

[0097] By adopting the above technical solution, a supporting plate is arranged along the long direction on the roll-formed side beam, and the ends of the roll-formed end beam and multiple support cross beams are jointly connected to the upper surface of the supporting plate, forming a unified bearing and assembly reference surface; the force at the end is more uniform, the boundary stiffness and flatness are significantly improved, and the assembly efficiency and consistency are enhanced synchronously.

[0098] In one embodiment, the supporting plate and the roll-formed side beam are integrally formed.

[0099] By adopting the above technical solution, the supporting plate and the roll-formed side beam are integrally formed, eliminating the interface weld and the assembly tolerance chain, with higher boundary stiffness and smaller heat affected zone; the dimensional stability is better under long-term vibration and thermal cycling, and the fitting degree and durability of the end sealing joint surface are improved.

[0100] In one embodiment, at least any one of the roll-formed side beam and the roll-formed end beam is provided with a lifting hole.

[0101] By adopting the above technical solution, lifting holes are arranged on the roll-formed side beam and / or the roll-formed end beam, which is convenient for the overall lifting and handling of the heat exchange plate or the battery insertion box; reducing the risk of deformation or collision caused by temporary fixtures and non-standard lifting points, and improving the safety and efficiency of assembly and operation and maintenance.

[0102] In one embodiment, the cross-sectional shapes of the roll-formed side beam and the roll-formed end beam are both "day" shaped.

[0103] By adopting the above technical solution, the roll-formed side beam and the end beam adopt a "day" shaped cross-section, with an optimized flange-web ratio and a high stiffness / weight ratio; under the same load, about 20% - 30% of steel can be saved compared with the traditional I-beam, while maintaining high bending and torsional resistance, significantly contributing to lightweight and cost reduction. [[ID=X]] [[ID=Y]]

[0104] In one embodiment, the roll-formed side beam and the roll-formed end beam are welded together by gas shielded welding.

[0105] By adopting the above technical solution, the roll-pressed side beam and the roll-pressed end beam are joined by gas shielded welding, resulting in high strength of the four corner connections, stable weld formation and minimal spatter, and controlled thermal deformation; the rectangular closure and overall rigidity of the support frame are guaranteed, the manufacturing cycle is fast, the yield is high, and the dimensional consistency and durability are improved.

[0106] According to a second aspect of this application, a battery pack is provided, including the battery compartment described in the first aspect.

[0107] In one embodiment, the device further includes battery cells, a plurality of which are arranged within the enclosure frame along the length of the heat exchange surface.

[0108] According to a third aspect of this application, an electrical device is also provided, including the battery pack described in the second aspect.

[0109] The beneficial effects of the embodiments of this application are as follows: 1. The battery pack consists of a heat exchange plate, an enclosure frame, and a cover, forming a complete installation space. The heat exchange plate's heat exchange surface is in direct contact with the battery cells, achieving efficient heat dissipation and preventing heat buildup in the cells from affecting their lifespan or safety. The enclosure frame, combined with the heat exchange plate, provides stable torque resistance to the heat exchange plate and ensures reliable cell fixation under vibration, impact, and other conditions. The cover further encloses the battery pack, forming a sealed cavity that is dustproof, moisture-proof, and improves overall environmental adaptability. Therefore, the enclosure frame not only ensures the lightweight structure of the battery pack but also increases the torque resistance of the heat exchange plate. 2. The cover is located on the side of the enclosure frame away from the heat exchange surface, so that the cover and the heat exchange plate form an upper and lower opposing structure. This not only achieves complete enclosure of the battery pack in terms of structure, but also makes it easier to reduce the height of the cover, thus reducing the weight of the cover and the amount of material used. The combination of the cover and the enclosure frame ensures the sealing and protection performance of the internal space, while also making it easy to operate during disassembly and maintenance, thereby improving the overall maintainability and reliability of the battery system. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0110] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0111] Figure 1 This is a schematic diagram of the overall structure of the battery compartment provided in the embodiments of this application; Figure 2This is an exploded view of the battery compartment provided in an exemplary embodiment of this application; Figure 3 yes Figure 2 Enlarged view of part A in the image; Figure 4 This is an exploded structural diagram of the heat exchange plate provided in the embodiments of this application; Figure 5 This is a schematic diagram of the internal structure of the flow channel plate provided in the embodiments of this application; Figure 6 This is an exploded structural diagram of the heat exchange plate provided in the embodiments of this application; Figure 7 This is a schematic diagram of the support structure provided in the embodiments of this application. Figure 1 ; Figure 8 This is a schematic diagram of the support structure provided in the embodiments of this application. Figure 2 ; Figure 9 This is a schematic diagram of the structure of the first crossbeam provided in the embodiments of this application; Figure 10 This is a schematic diagram of the supporting longitudinal beam provided in the embodiments of this application; Figure 11 This is a structural schematic diagram of the third crossbeam provided in the embodiments of this application; Figure 12 This is a partial structural schematic diagram of the second crossbeam provided in the embodiments of this application; Figure 13 This is a partial schematic diagram showing the connection relationship between the roll forming side beam and the roll forming end beam provided in the embodiments of this application; Figure 14 This is a schematic diagram of the end structure of the roll-forming end beam provided in the embodiments of this application.

[0112] Explanation of reference numerals in the attached figures: 1. Heat exchange plate; 11. Heat exchange surface; 111. External contact surface; 2. Enclosure frame; 21. Enclosure side beams; 22. Enclosure end beams; 3. Box lid; 4. Fix the crossbeam; A. Flow channel plate; 1A. Plate body; 2A, U-shaped flow channel; 2A1, inlet flow section; 2A2, outlet flow section; 2A3, support section; 2A4, sub-branch; 3A, Liquid inlet channel; 3A1, First partition; 3A2, Liquid inlet branch 1; 3A3, Liquid inlet branch 2; 4A, liquid outlet channel; 4A1, second partition; 4A2, liquid outlet branch 1; 4A3, liquid outlet branch 2; 5A. Reinforcement section; 6A, flat plate; 6A1, inlet nozzle; 6A2, outlet nozzle; 7A. Brazing overflow hole; 8A. Cooling flow channel; B. Supporting structure; 1B, Support frame; 1B1, Rolled edge beam; 1B2, Rolled end beam; 1B3, Support plate; X, Supporting main beam; 2B, Supporting crossbeam; 2B1, First crossbeam; 2B11, Transverse reinforcing rib; 2B2, Second crossbeam; 2B21, Second installation gap; 2B3, Third crossbeam; 2B31, Fitting groove; 3B, Supporting longitudinal beam; 3B1, Limiting groove; 3B2, Longitudinal reinforcing rib; 4B, limiting component; 4B1, first limiting part; 4B11, first mounting gap; 4B2, second limiting part; 5B, Support component; 5B1, First support part; 5B2, Second support part; 6B. Lifting hole. Detailed Implementation

[0113] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0114] Firstly, this application provides a battery compartment, please refer to [link / reference]. Figure 1 and Figure 2 The battery pack includes a heat exchange plate 1, a housing frame 2, and a cover 3. The heat exchange plate 1 has a heat exchange surface 11, which is configured to be placed in direct contact with the battery cell. During the operation of the battery cell, the heat generated inside the battery cell can be evenly conducted to the cooling medium inside the heat exchange plate 1 through the heat exchange surface 11. When the cooling medium flows in the heat exchange plate 1, it will carry away the heat. This close contact method is beneficial to reducing the temperature rise of the battery cell under high-rate charging and discharging conditions, maintaining a relatively stable operating temperature range, and avoiding the risk of battery cell performance degradation or potential thermal runaway due to excessive local temperature rise.

[0115] For example, the enclosure frame 2 is disposed around the heat exchange surface 11 of the heat exchange plate 1. The inner ring of the enclosure frame 2 opens towards the central area of ​​the heat exchange plate 1 to provide a placement position for the battery cell. When the battery cell is placed within the space defined by the inner ring, it can achieve a better positioning effect and reduce assembly deviation. At the same time, the presence of the enclosure frame 2 also provides a circumferential limiting structure between the battery cell and the heat exchange plate 1, making it less likely for the battery cell to shift in the installation space when subjected to external vibration and impact, which to a certain extent is beneficial to the structural stability of the battery cell during long-term use.

[0116] For example, the cover 3 is fixedly connected to the enclosure frame 2 by fasteners. When the cover 3, enclosure frame 2, and heat exchange plate 1 work together, they form a closed installation space. This installation space is used to store the battery cells, protecting them from external dust, moisture, or foreign objects. The closed structure, to a certain extent, helps extend the service life of the battery cells and the battery box as a whole, and improves adaptability in complex environments such as humidity and dust. That is, the combination of the enclosure frame 2 and the heat exchange plate 1 provides stable torque resistance to the heat exchange plate 1, while also ensuring reliable fixation of the battery cells under vibration, impact, and other conditions. The cover 3 further encloses the battery box to form a closed cavity, which is dustproof and moisture-proof, improving overall environmental adaptability. Therefore, the enclosure frame 2 not only ensures the lightweight structure of the battery box but also increases the torque resistance of the heat exchange plate 1.

[0117] For example, the enclosure frame 2 specifically includes enclosure side beams 21 and enclosure end beams 22. The enclosure side beams 21 are distributed along the length direction of the heat exchange plate 1 on the long side edge of the heat exchange plate 1, and the enclosure end beams 22 are distributed along the width direction of the heat exchange plate 1 on the wide side edge of the heat exchange plate 1. The enclosure side beams 21 and the enclosure end beams 22 are perpendicular to each other and connected at the four corners to form an overall frame skeleton. This arrangement can constrain and support the heat exchange plate 1 in both the longitudinal and transverse directions, which is beneficial to improving the bending resistance and torque resistance of the heat exchange plate 1 to a certain extent.

[0118] For example, both the retaining side beam 21 and the retaining end beam 22 adopt a hollow structure. The so-called hollow structure means that the inside of the beam is filled with a cavity by molding, while the outside remains a closed section. This design can increase the section resistance moment without increasing the amount of material used, thus providing high structural stiffness and load-bearing capacity with a relatively light weight. This has obvious value for the lightweight design of battery packs. The hollow section can also disperse stress concentration under the action of external force impact, which is beneficial to improving the overall impact resistance stability.

[0119] Exemplarily, the enclosure side beam 21 and the enclosure end beam 22 are welded together by gas shielded welding. Gas shielded welding is a welding method that isolates the air with a shielding gas, melts the welding wire and the base metal under the action of arc heat, and forms a weld after cooling and solidification. This method can reduce the formation of defects such as oxides and pores during the welding process to a certain extent, making the welded joint have better strength and toughness. The welding points are set at the four joint vertices, and the four-point welding method ensures the balance of the overall frame when受力, which is beneficial to improving the overall stability and durability of the battery cassette.

[0120] In some embodiments, combined with Figure 2 、 Figure 3 , the cross-sectional shapes of the enclosure side beam 21 and the enclosure end beam 22 are in the shape of a "day" character structure. Here, the "day" character structure means that the outer shape of the beam body is similar to the Chinese character "日" and has a rectangular hole or notch in the middle. Further, the enclosure side beam 21 and the enclosure end beam 22 are made of HC420 / 780DP cold-rolled high-strength steel. This steel has both high strength and good ductility, and is suitable for roll forming process. Under the same load conditions, the "day" character cross-section can save 20% to 30% of the material compared with the traditional I-beam cross-section. Its cross-sectional area distribution is more reasonable, and the ratio of the flange to the web is optimized, which can obtain a higher stiffness-to-weight ratio. To a certain extent, it is beneficial to reduce the self-weight of the battery cassette, lower the foundation load and transportation cost, and at the same time improve the bending stiffness and torsional stiffness of the structure under the stress state. Therefore, while meeting the lightweight design requirements of the battery cassette, it maintains a high structural strength.

[0121] Exemplarily, the box cover 3 is installed on the side of the enclosure frame 2背离 the heat exchange surface <11> of the heat exchange plate 1. The box cover 3 is fixedly connected to the frame by fastening. When the box cover 3 is set, it forms an up-and-down opposed relationship with the heat exchange plate 1. This structural arrangement enables the battery cells to be placed from the opening side of the frame during assembly, making the assembly path smoother during the installation process, which is beneficial to improving the efficiency of the production and maintenance links. At the same time, the presence of the box cover <3> can further block the water vapor and dust in the external environment, improve the cleaning environment inside the battery cassette, and ensure the stability of the long-term operation of the battery cells. At the same time, when the box cover <3> is connected to the side of the enclosure frame <2>背离 the liquid heat exchange surface <11>, it is also convenient to reduce the height setting of the box cover <3>, making the weight of the box cover <3> lighter and the material used less.

[0122] In some embodiments, the connection method between the box cover <3> and the enclosure frame is bolt connection. That is, a waterproof and sealed rivet nut is riveted at one end of the enclosure side beam <21> for locking the box cover <3>, and a fixed fastening through hole is opened at the other end for fastening with a large-diameter head blind rivet screw. Similarly, a waterproof and sealed rivet nut is riveted at one end of the enclosure end beam <22> for locking the box cover <3>, and a fixed fastening through hole is opened at the other end for fastening with a large-diameter head blind rivet screw.

[0123] Exemplarily, in combination with Figure 1 , Figure 2 , water inlet nozzles 6A1 and water outlet nozzles 6A2 are provided at both ends of the heat exchange plate 1. Both the water inlet nozzles 6A1 and the water outlet nozzles 6A2 are arranged on the external joint surface 111 formed between the enclosing end beam 22 and the wide-side edge of the heat exchange plate 1. This arrangement makes the cooling interfaces of the heat exchange plate 1 concentrated at the external joint position of the plug-in box, facilitating connection with external cooling pipelines. Installers have more sufficient operating space when connecting pipelines, which helps to reduce the assembly difficulty and the risk of leakage caused by uneven stress on the interfaces. At the same time, the inlet and outlet of the cooling medium are separately arranged at both ends of the heat exchange plate 1, enabling the cooling medium to flow through the interior of the heat exchange plate 1 with a relatively uniform flow path, which helps to improve the heat exchange efficiency and makes the thermal management performance of the battery cells more stable.

[0124] In some embodiments, a fixed cross beam 4 is connected to the heat exchange surface 11 of the heat exchange plate 1. The length direction of the fixed cross beam 4 is the same as the length direction of the enclosing end beam 22. Further, the fixed cross beam 4 is provided on the side of the enclosing end beam 22 away from the external joint surface 111, that is, the fixed cross beam 4 is provided inside the inner ring of the enclosing frame 2. Specifically, the cross section of the fixed cross beam 4 can also be in the shape of a "day" character, and its interior is also hollow. It can be understood that the setting of the fixed cross beam 4 can further enhance the strength of the heat exchange plate 1, thereby relatively improving the anti-torsion and anti-bending performance of the heat exchange plate 1.

[0125] In some embodiments, a VCMU mounting bracket and an electrical connector panel mounting bracket are also provided on the heat exchange surface 11 of the heat exchange plate 1 and within the inner ring of the enclosing frame 2. The VCMU mounting bracket is used to mount the battery plug-in box VCMU (BMS), and the electrical connector panel mounting bracket is used to mount relevant electrical component terminals and the like.

[0126] Through the above structural design, the battery plug-in box is jointly composed of the heat exchange plate 1, the enclosing frame 2, and the box cover 3 to form a complete installation space. The heat exchange surface 11 of the heat exchange plate 1 directly adheres to the battery cells to achieve efficient heat dissipation, avoiding the influence of heat accumulation on the life or safety of the battery cells. The combination of the enclosing frame 2 and the heat exchange plate 1 can provide the heat exchange plate 1 with a stable anti-torsion ability, and at the same time ensure the reliable fixation of the battery cells under working conditions such as vibration and impact. The box cover 3 further encloses to form a closed cavity, playing a role in dust prevention and moisture protection, and improving the overall environmental adaptability. Therefore, while ensuring the lightweight structure of the battery plug-in box, the enclosing frame 2 also increases the anti-torsion performance of the heat exchange plate 1, enabling the battery plug-in box to achieve a good balance between lightweight design and structural strength, and meeting the comprehensive requirements of the energy storage system for safety, reliability, and maintainability under complex working conditions.

[0127] In some embodiments, please refer to Figure 4 and Figure 5The heat exchange plate 1 includes a flow channel plate 7B, which comprises a plate body 1A, a U-shaped flow channel 2A, an inlet flow channel 3A, and an outlet flow channel 4A. Furthermore, the plate body 1A, as the main load-bearing structure of the flow channel plate 7B, can be made of aluminum alloy material during the manufacturing process, taking into account thermal conductivity, strength, and corrosion resistance.

[0128] For example, at least two loop channels 2A are arranged in parallel on the plate 1A. Each loop channel 2A has an independent cooling circulation path. The liquid inlet channel 3A and the liquid outlet channel 4A are both arranged on the plate 1A and connected to the multiple loop channels 2A. The liquid inlet channel 3A is configured to guide the cooling medium to enter the multiple loop channels 2A after diversion. The liquid outlet channel 4A is configured to collect the cooling medium flowing out of the multiple loop channels 2A.

[0129] It is understandable that after the cooling medium enters the plate 1A through the inlet channel 3A, it can be distributed into multiple loop channels 2A at the distribution node, and then collected at the confluence node through the outlet channel 4A, thus forming a parallel cooling loop. This structure improves the uniformity of the coolant flow path in different areas to a certain extent, avoids the problem of excessive temperature rise at the end when a single channel is connected in series, and thus helps to make the temperature distribution of the entire cooling system more uniform.

[0130] In a preferred embodiment, combined with Figure 4 and Figure 5 The loop-shaped flow channel 2A includes an inlet section 2A1 and an outlet section 2A2, which are connected and respectively connected to the inlet flow channel 3A and the outlet flow channel 4A. Specifically, the end of the inlet section 2A1 furthest from the outlet section 2A2 is connected to the inlet flow channel 3A, and the end of the outlet section 2A2 furthest from the inlet section 2A1 is connected to the outlet flow channel 4A. This layout allows the cooling medium to smoothly enter the inlet section 2A1 through the inlet flow channel 3A and evenly cover the flow area. The inlet section 2A1 and the outlet section 2A2 are arranged in a staggered pattern along the thickness of the plate 1A, which to some extent extends the flow path of the coolant within the loop-shaped flow channel 2A, allowing it to cover a larger area of ​​the battery's heated region, thereby enhancing heat exchange capacity. Furthermore, through this staggered design, the coolant can form a more rational spatial distribution flow direction between different layers within the loop-shaped flow channel 2A, effectively preventing insufficient cooling in certain areas and improving the overall heat dissipation effect.

[0131] In some embodiments, the inlet flow section 2A1 is a counterclockwise flow channel and includes multiple continuously shrinking counterclockwise sub-flow channels, and the outlet flow section 2A2 is a clockwise flow channel and includes multiple continuously enlarging clockwise sub-flow channels.

[0132] In some embodiments, the inlet flow section 2A1 is a clockwise flow channel and includes multiple continuously shrinking clockwise sub-flow channels, and the outlet flow section 2A2 is a counterclockwise flow channel and includes multiple continuously enlarging counterclockwise sub-flow channels.

[0133] It is understandable that the clockwise and counterclockwise flow channel layout allows the inlet flow section 2A1 and the outlet flow section 2A2 to be reasonably and effectively distributed on the plate 1A using a limited area. This enables the inlet flow section 2A1 and the outlet flow section 2A2 to achieve sufficient heat exchange without affecting the flow of the internal cooling medium, thereby further improving the heat exchange effect of the liquid cooling plate.

[0134] For example, the connecting portion between the inlet section 2A1 and the outlet section 2A2 can be designed as an "S" shape or a "U" shape. The S-shaped structure creates a tortuous path during flow, extending the flow path of the cooling medium to some extent and enhancing turbulence, thereby improving the heat transfer performance between the fluid and the wall. Meanwhile, the U-shaped structure has a smoother flow trajectory at the turning point, reducing local resistance and pressure drop, which is beneficial for reducing energy consumption and maintaining a stable flow state under higher flow velocity conditions.

[0135] Meanwhile, the aforementioned two design configurations not only guide the refrigerant through the interior of the loop-shaped flow channel 2A via more complex paths, but also induce refrigerant tumbling, agitation, and disturbance during the flow process, thereby disrupting the gas-liquid stratification state, improving the mixing degree and phase change efficiency, and enhancing the heat transfer performance of the loop-shaped flow channel 2A. It is worth noting that both configurations achieve a balance between structural design and flow effect in different ways, allowing technicians to select the appropriate configuration based on specific operating conditions.

[0136] In some implementations, combined with Figure 4 and Figure 5 The inlet channel 3A is provided with a first dividing section 3A1, which can divide the inlet channel 3A into a single inlet branch 3A2 and a second inlet branch 3A3 that are connected end to end. This design is beneficial for the cooling medium to be diverted before entering the plate 1A, ensuring that each loop channel 2A receives a more balanced supply of coolant, thereby reducing the risk of excessively high or low local flow velocities at the inlet.

[0137] For example, a second partition 4A1 is provided on the outlet channel 4A, which can divide the outlet channel into an outlet branch 4A2 and an outlet branch 4A3 that are connected end to end. This further improves the flow pattern of coolant at the outlet and avoids pressure increases or liquid backflow in some sub-channels due to uneven flow. Furthermore, the inlet branch 3A2 and the outlet branch 3A3, as well as the outlet branch 4A2 and the outlet branch 4A3, can be designed to be parallel and of the same width. This parallel layout helps maintain a uniform flow distribution of coolant when it enters and exits the channel, and reduces flow deviation caused by differences in branch geometry.

[0138] It is worth noting that the above "connected at the beginning and end" means that the two branches are connected at the beginning and end, but separated in the middle.

[0139] In some implementations, combined with Figure 4 and Figure 5 To enhance the mechanical stability and heat flow uniformity of the flow channel structure, multiple support portions 2A3 are provided inside the loop-shaped flow channel 2A, and the support portions 2A3 are spaced apart along the extension direction of the loop-shaped flow channel 2A. For example, the support portions 2A3 located in the long straight section of the loop-shaped flow channel 2A can be elongated, and the support portions 2A3 located at the corners of the loop-shaped flow channel 2A can be circular. The edges of all support portions 2A3 are rounded or smoothly transitioned to avoid turbulence or interference with the flow of the cooling medium.

[0140] It is understandable that the function of the support 2A3 is to support the inner wall of the plate 1A, preventing deformation of the inner cavity due to pressure during brazing or subsequent use. Simultaneously, the support 2A3 can guide the fluid during flow, preventing stagnation in localized areas. Multiple supports 2A3 can also divide the flow channel into at least two sub-branches 2A4, each parallel and of equal width. This branching structure further shortens the fluid residence time within a single flow channel and increases the contact area between the fluid and the wall, thereby improving cooling efficiency to some extent. Through this structural arrangement combining flow branching and support, the overall pressure resistance and cooling performance of the heat exchange plate 1 can be synergistically optimized.

[0141] For example, at least one or some of the corners of the loop channel 2A employ a rounded corner transition structure. Geometrically, rounded corner transitions can mitigate local resistance losses during sharp fluid turns, reduce flow separation and vortex generation, thereby lowering pressure drop and improving flow stability to some extent. Simultaneously, the rounded corner design at the corners of the loop channel 2A also helps extend the fatigue life of the plate 1A under long-term circulating flow conditions, preventing cracks or corrosion caused by stress concentration at sharp corners. Therefore, rounded corner transitions not only have a positive effect on flow performance but also hold significant importance in terms of mechanical strength and reliability.

[0142] For example, reinforcement sections 5A can be provided at the connection points between the inlet flow channel 3A and the outlet flow section 2A1, and at the connection points between the outlet flow channel 4A and the outlet flow section 2A2. The reinforcement section 5A generally manifests as an increase in local structural thickness or the formation of reinforcing ribs to enhance the mechanical strength of the connection. Since the inlet and outlet connections often experience high fluid impact and pressure fluctuations, providing the reinforcement section 5A can reduce local deformation and leakage risks to a certain extent. Simultaneously, the reinforcement section 5A, the first partition section 3A1, the second partition section 4A1, and the support section 2A3 are all spaced apart. This spatial distribution avoids excessive concentration of local structures, ensures overall stress dispersion, and thus improves the structural stability and lifespan of the flow channel plate 7B.

[0143] Furthermore, the outer periphery of the reinforcement section 5A is also rounded to avoid excessive turbulence or excessive interference with the flow of the cooling medium.

[0144] In some implementations, combined with Figure 4 and Figure 5 The heat exchange plate 1 also includes a flat plate 6A, which is connected to the plate body 1A to cover the loop flow channel 2A, the liquid inlet flow channel 3A and the liquid outlet flow channel 4A.

[0145] For example, the plate 6A and the plate body 1A are connected by brazing. Brazing uses a metal material with a melting point lower than that of the base material as a filler metal. Under heating conditions, the filler metal melts and fills the joint gap, forming a strong connection through wetting and diffusion. This welding method ensures the sealing and reliability of the connection area to a certain extent. Compared with traditional fusion welding, brazing avoids large-area melting of the base material, reducing the risk of structural deformation, and is particularly suitable for thin-walled components like the heat exchange plate 1, which has a complex internal flow channel structure.

[0146] For example, multiple brazing overflow holes 7A are correspondingly provided on both the flat plate 6A and the flow channel plate 7B of the heat exchange plate 1. These overflow holes 7A serve as channels for venting and draining liquid during the welding process, facilitating the removal of excess brazing filler metal or gas, thereby preventing internal voids or incomplete penetration. It is understood that the overflow holes also facilitate the inspection and control of welding quality, improving manufacturing consistency and the yield rate of finished products. Riveting mounting holes can also be provided on the flat plate 6A and the flow channel plate 7B. During the assembly of the heat exchange plate 1, the reliability of the plate body 1A connection can be enhanced by rivet fixing, further improving the overall structural stability. Through both brazing and mechanical connection, the heat exchange plate 1 receives dual protection in terms of sealing and pressure resistance.

[0147] For example, the plate 6A is provided with an inlet 6A1 and an outlet 6A2, which are used to connect to external cooling pipes so that the coolant can smoothly enter and exit the flow channel system.

[0148] Furthermore, the material of the flat plate 6A of the heat exchange plate 1 can be AL-3003 MOD, and the material of the flow channel plate 7B can be AL-3003 / 4045 MOD. This type of material possesses high hardness, strength, and wear resistance, enabling it to withstand significant pressure and friction under cyclic cooling conditions. It also exhibits good toughness and corrosion resistance, maintaining stable performance in various working environments. Its machinability is excellent, facilitating stamping, brazing, and other forming processes. Through heat treatment, its hardness and strength can be further improved to meet the application requirements of different environments. The appropriate selection of materials ensures a balance between strength, thermal conductivity, and corrosion resistance in the heat exchange plate 1.

[0149] For some implementation methods, please refer to Figure 6 , Figure 7 The heat exchange plate 1 also includes a support structure B, which is connected to the lower surface of the flow channel plate 7B. It can be understood that the flow channel plate 7B, as the main load-bearing component for coolant flow, combined with the support structure B, can ensure the geometric stability of the flow channel to a certain extent, reduce the deformation of the flow channel caused by external pressure or thermal circulation, and improve the overall heat exchange efficiency of the heat exchange plate 1.

[0150] For example, the support structure B includes a support frame 1B, a support main beam X, and a support member 5B, wherein the support main beam X is disposed on the support frame 1B, the support member 5B is disposed on the support main beam X, and the support member 5B is configured to abut against the flow channel plate 7B and avoid the cooling flow channel 71B of the flow channel plate 7B.

[0151] In some embodiments, the supporting main beam X includes a supporting crossbeam 2B, and multiple supporting crossbeams 2B are provided along the length direction of the supporting frame 1B, and the length direction of the supporting crossbeam 2B is consistent with the width direction of the supporting frame 1B. In some embodiments, the supporting main beam X also includes a supporting longitudinal beam 3B, which is connected to the supporting frame 1B and a plurality of supporting cross beams 2B, and the length direction of the supporting longitudinal beam 3B is consistent with the length direction of the supporting frame 1B.

[0152] For example, multiple support members 5B are provided on the support beam 2B and the support longitudinal beam 3B. The support members 5B are configured to abut against the flow channel plate 7B but avoid the loop flow channel 2A, liquid inlet flow channel 3A and liquid outlet flow channel 4A of the flow channel plate 7B. It is worth noting that the loop flow channel 2A, liquid inlet flow channel 3A and liquid outlet flow channel 4A can be collectively referred to as the cooling flow channel 7B1 below. That is, the support members 5B are installed on the upper surface of the support beam 2B or the support longitudinal beam 3B, and their positions are optimized to avoid the distribution area of ​​the cooling flow channel 7B1, thereby providing direct surface support to the flow channel plate 7B without interfering with the normal flow of the cooling medium.

[0153] For example, the support structure B also includes limiting members 4B, multiple of which are provided on the support crossbeam 2B and the support longitudinal beam 3B, and are used to limit the relative position of the support longitudinal beam 3B and the support crossbeam 2B. The setting of the limiting members 4B ensures that the relative positional relationship between the support crossbeam 2B and the support longitudinal beam 3B remains stable, and even when the battery pack is subjected to external vibration and thermal cycling stress for a long time, the internal components of the support frame 1B will not be misaligned or loosened. This structural configuration enables the flow channel plate 7B to remain flat and stable under high load and high frequency vibration conditions, and the convex area of ​​the cooling flow channel 7B1 will not deform significantly due to pressure, thereby improving the overall structural strength of the heat exchange plate 1 and the sealing reliability of long-term operation, while also providing higher safety redundancy for the battery thermal management system.

[0154] In some embodiments, combined with Figure 7 , Figure 8 and Figure 9The supporting beam 2B includes a first beam 2B1, the length of which coincides with the central axis of the supporting frame 1B. The first beam 2B1 is arranged along the central axis of the supporting frame 1B, effectively forming a through-beam in the middle of the supporting frame 1B. The presence of the first beam 2B1 effectively shortens the unsupported span of the flow channel plate 7B in the lateral direction, resulting in a more balanced distribution of stress in the mid-span. Since the flow channel plate 7B is subjected to the combined effects of the battery module weight, liquid pressure, and external impacts during use, the mid-span position is most prone to sagging or warping. By introducing the first beam 2B1 along the central axis, the bending and torsional stiffness of the central region can be significantly improved, keeping the deformation of the flow channel plate 7B under overall pressure within a reasonable range and preventing cracking at welded joints or localized thinning of the flow channel wall due to excessive bending. This symmetrical arrangement also allows for a more uniform release of thermal stress generated by temperature changes in the overall frame, thus ensuring the shape stability and consistency of the heat exchange plate 1 during long-term operation.

[0155] In some examples, the limiting member 4B includes a first limiting part 4B1, with at least two first limiting parts 4B1 spaced apart on the first crossbeam 2B1, forming a first installation gap 4B11 between adjacent first limiting parts 4B1. The supporting longitudinal beam 3B is installed within the first installation gap 4B11. It can be understood that multiple first limiting parts 4B1 are provided on the first crossbeam 2B1, and these multiple first limiting parts 4B1 can be arranged in groups, with each group of first limiting parts 4B1 forming a first installation gap 4B11. The supporting longitudinal beam 3B can be inserted into this first installation gap 4B11 and positioned and clamped by adjacent first limiting parts 4B1. This design allows the supporting longitudinal beam 3B to be quickly installed and positioned without additional welding or complex fixtures, reducing the complexity of the production assembly process. Therefore, the supporting longitudinal beam 3B is less prone to relative slippage or displacement when subjected to external vibration and impact, and the entire supporting frame 1B remains stable over a long period. In this way, the internal skeleton of the heat exchange plate 1 can ensure high assembly accuracy and consistency, thereby further reducing the stress concentration phenomenon caused by uneven support in local areas of the flow channel plate 7B.

[0156] In some examples, the first limiting part 4B1 is configured to abut against the flow channel plate 7B while avoiding the cooling flow channel 7B1 of the flow channel plate 7B. With this arrangement, the first limiting part 4B1 not only serves to position the supporting longitudinal beam 3B, but also forms an additional contact support point between the supporting longitudinal beam 3B and the flow channel plate 7B, thereby dispersing the stress. Since the cooling flow channel 7B1 typically exists in the form of a convex bulge or shallow cavity, its wall thickness is relatively thin and it bears internal and external pressure differences, making it highly susceptible to leakage risks due to external localized stress concentration during long-term use. By allowing the first limiting part 4B1 to directly abut against the flow channel plate 7B, localized bending of the plate can be alleviated over a large area, while avoiding interference with overlapping areas of the flow channel. This design achieves a coupling of positioning and support functions, further enhancing the overall compressive strength and durability of the heat exchange plate 1.

[0157] In some embodiments, a plurality of transverse reinforcing ribs 2B11 are provided on the first crossbeam 2B1 along its length. These transverse reinforcing ribs 2B11 are staggered from the first limiting portion 4B1 and avoid the first installation gap 4B11. It can be understood that, in order to further improve the structural rigidity of the first crossbeam 2B1, a plurality of transverse reinforcing ribs 2B11 are provided on the first crossbeam 2B1 along its length. The specific arrangement of the transverse reinforcing ribs 2B11 avoids the positions of the limiting portion and the first installation gap 4B11, ensuring that the overall bending stiffness is improved without affecting the insertion and positioning of the supporting longitudinal beam 3B. At the same time, the transverse reinforcing ribs 2B11 can significantly increase the moment of inertia of the supporting crossbeam 2B, giving it a stronger resistance to deformation when subjected to external vertical loads.

[0158] This method of localized reinforcement is particularly suitable for use in large-size heat exchange plates 1, because as the size of the flow channel plate 7B increases, the stress on the supporting beam 2B also increases accordingly. Without transverse stiffeners 2B11, buckling or lateral instability can easily occur in the middle of the supporting beam 2B. By adding transverse stiffeners 2B11 at appropriate locations, the initiation of fatigue cracks can be delayed, maintaining the structural stability of the support frame 1B during long-term operation, while also ensuring assembly accuracy and the fit of the flow channel plate 7B.

[0159] In some implementations, combined with Figure 8 , Figure 9 and Figure 10 A limiting groove 3B1 is provided on the supporting longitudinal beam 3B to fit into the first limiting part 4B1, allowing the supporting longitudinal beam 3B to be accurately embedded between the limiting parts and achieve stable locking during assembly. It can be understood that the presence of the limiting groove 3B1 not only makes the fit between the supporting longitudinal beam 3B and the supporting crossbeam 2B tighter, but also provides additional shear strength when subjected to lateral impact forces, thereby preventing longitudinal misalignment of the supporting longitudinal beam 3B within the frame.

[0160] It is worth noting that the limiting engagement refers to the fitting relationship formed when the first limiting part 4B1 is inserted into the limiting groove 3B1. The first limiting part 4B1 is restricted to a specific position within the limiting groove 3B1, which can, to a certain extent, prevent relative displacement between the supporting longitudinal beam 3B and the supporting transverse beam 2B. Through this limiting engagement relationship, positioning can be quickly achieved during assembly and stability can be maintained when the structure is under load, making the connection between the supporting longitudinal beam 3B and the supporting transverse beam 2B more reliable, thereby improving the overall stiffness and long-term stability of the entire supporting structure B.

[0161] Furthermore, the fit between the limiting groove 3B1 and the first limiting part 4B1 can be considered as a mortise and tenon joint structure. This mortise and tenon joint significantly improves the overall rigidity and anti-loosening ability of the connection part. Compared with the traditional welding fixing method, it has the advantages of disassembly and assembly flexibility, reducing subsequent maintenance costs. At the same time, the design of the limiting groove 3B1 can also effectively avoid deformation problems caused by welding residual stress, so that the heat exchange plate 1 can maintain good structural stability under complex thermal conditions.

[0162] In some embodiments, longitudinal stiffeners 3B2 are also provided along the length of the supporting longitudinal beam 3B to improve its bending stiffness and out-of-plane stability. During actual operation, the supporting longitudinal beam 3B needs to withstand the dual pressures from the weight of the battery cell and the reaction force of the flow channel plate 7B. Without the longitudinal stiffeners 3B2, its slenderness ratio is too large, making it prone to local buckling or overall bending, thus affecting its support effect on the flow channel plate 7B. By introducing longitudinal stiffeners 3B2 into the supporting longitudinal beam 3B, not only is the load-bearing capacity of the supporting longitudinal beam 3B improved, but it also exhibits stronger shape retention under thermal cycling and vibration loads. This structural improvement can effectively extend the fatigue life of the longitudinal beam, ensure that the flow channel plate 7B maintains its flatness over a long period, thereby improving the overall stability and heat dissipation performance of the heat exchange plate 1.

[0163] In some embodiments, the supporting crossbeam 2B further includes second crossbeams 2B2, with multiple second crossbeams 2B2 arranged parallel to each other on both sides of the first crossbeam 2B1 on the supporting frame 1B. It can be understood that by setting multiple second crossbeams 2B2 on both sides of the first crossbeam 2B1, a denser grid structure is formed with the supporting longitudinal beam 3B. The introduction of the second crossbeams 2B2 significantly shortens the free span of the flow channel plate 7B in both the transverse and longitudinal directions, allowing the load to be distributed more evenly on the plate surface. In this way, the deformation of the flow channel plate 7B is significantly suppressed, and its overall flatness can still be maintained even under heavy loads. The multi-beam structural design can also be flexibly adjusted according to the layout of the cooling flow channel 7B1, thereby providing sufficient support without affecting the flow of the cooling medium. This optimized layout can reduce the plate thickness while ensuring heat dissipation performance, contributing to the lightweighting and cost control of the heat exchange plate 1.

[0164] In some implementations, combined with Figure 7 , Figure 8 The limiting member 4B also includes a second limiting part 4B2, which is provided on the supporting longitudinal beam 3B in multiple ways. The second limiting part 4B2 is configured to cooperate with the second crossbeam 2B2 for limiting.

[0165] For example, a second installation gap 2B21 is provided on the second crossbeam 2B2 along the length direction of the second crossbeam 2B2, and the second limiting part 4B2 is embedded in the second installation gap 2B21.

[0166] Understandably, this fit ensures the fixed relative position between the second crossbeam 2B2 and the supporting longitudinal beam 3B, further enhancing the structural stability of the entire supporting frame 1B. Similar to the first limiting part 4B1, the second limiting part 4B2 can also provide positioning constraints in multiple directions, effectively suppressing the displacement or torsion of the second crossbeam 2B2 when subjected to vibration. Specifically, the second limiting part 4B2 can be embedded in the second mounting gap 2B21 to form a stable fit. This interlocking positioning method allows the second crossbeam 2B2 to be quickly and accurately positioned during assembly, while providing a larger shear contact area under stress. Through the interlocking design, the bonding strength between the second crossbeam 2B2 and the supporting longitudinal beam 3B is significantly improved, not only resisting combined loads from the longitudinal and transverse directions, but also maintaining a stable relative position during the cycle of thermal expansion and contraction. Compared with traditional spot welding or screw connections, this method has better long-term dimensional stability, helping to prevent abnormal noise or performance degradation caused by loose connections, thereby improving the overall operational reliability of the heat exchange plate 1.

[0167] In some embodiments, the second limiting part 4B2 is configured as a protrusion formed by part of the supporting longitudinal beam 3B toward the side away from the flow channel plate 7B. That is, the second limiting part 4B2 is formed by a partial protrusion of the supporting longitudinal beam 3B toward the side away from the flow channel plate 7B. This structure can not only achieve the limiting function, but also avoid interference with the cooling flow channel 7B1 area, and at the same time reduce the weight of the supporting longitudinal beam 3B, avoiding the need for additional components.

[0168] Furthermore, the raised structure has the advantage of being able to be completed in a single stamping process, reducing the number of parts and additional welding points, thus lowering manufacturing costs and process complexity. Simultaneously, the raised structure possesses inherent bending stiffness, making it less prone to deformation under external forces, thereby effectively ensuring the long-term stability of the limiting effect of the supporting longitudinal beam 3B on the second transverse beam 2B2. Since the second limiting part 4B2 is far from the surface of the flow channel plate 7B, it also avoids localized stress concentration or electrochemical corrosion problems on the flow channel plate 7B that may be caused by metal-to-metal contact, thereby further improving the durability and service life of the heat exchange plate 1.

[0169] In some implementations, reference is made to Figure 8 , Figure 9 and Figure 10 The support component 5B also includes a first support portion 5B1, which has multiple portions on both the support beam 2B and the support longitudinal beam 3B. Specifically, the first support portion 5B1 is positioned to abut against the surface of the flow channel plate 7B after bypassing the cooling channel 7B1. This structural design aims to ensure that the flow channel plate 7B is undisturbed in the area of ​​the cooling channel 7B1, thereby ensuring normal coolant flow, while providing additional support points in the non-flow channel area. It can be understood that by abutting against the surface of the flow channel plate 7B, the first support portion 5B1 can, to a certain extent, disperse the external pressure borne by the flow channel plate 7B, avoiding local deformation due to concentrated loads, and maintaining a high degree of flatness and sealing of the flow channel plate 7B during operation. This layout, which avoids the cooling channel 7B1, balances the integrity of the heat exchange channel with the overall structural support strength, playing a positive role in extending the service life of the flow channel plate 7B in the battery thermal management system.

[0170] In some embodiments, the first support portion 5B1 is a protrusion formed on part of the supporting longitudinal beam 3B or part of the supporting crossbeam 2B facing towards the flow channel plate 7B. It is understood that this protrusion refers to a raised portion formed on the supporting longitudinal beam 3B or supporting crossbeam 2B through local material extension or forming processes. The first support portion 5B1 can form a support point without adding additional components. This protrusion contacts the surface of the flow channel plate 7B, creating a stable force transmission path between the first support portion 5B1 and the flow channel plate 7B, which can reduce the overall processing and assembly complexity to a certain extent, while improving structural compactness. By directly integrating the support function onto the supporting crossbeam 2B or supporting longitudinal beam 3B, the number of parts can be reduced, production efficiency improved, and overall manufacturing costs reduced, while also enhancing the contact stability between the supporting crossbeam 2B and supporting longitudinal beam 3B and the flow channel plate 7B.

[0171] In some implementations, combined with Figure 7 , Figure 8 The support member 5B also includes a second support portion 5B2. The length direction of the second support portion 5B2 is perpendicular to the length direction of the second crossbeam 2B2, and the second support portion 5B2 is designed to abut against the surface of the flow channel plate 7B after bypassing the cooling channel 7B1. The function of the second support portion 5B2 is to provide additional support force in the vertical direction of the second crossbeam 2B2, thereby forming a multi-directional support network in the crisscrossing frame structure. This structure can improve the stability of the flow channel plate 7B under multi-directional loads to a certain extent and avoid warping deformation under thermal cycling or hydraulic shock conditions. By avoiding the cooling channel 7B1 of the flow channel plate 7B, the second support portion 5B2 does not affect the flow of coolant and can provide balanced support at key positions of the flow channel plate 7B, which has a significant effect on improving the overall stress uniformity and reliability of the flow channel plate 7B.

[0172] For example, the second support 5B2 is an aluminum block (AL-6061) that is riveted to the second crossbeam 2B2. It is the main support for the flow channel plate 7B, which can ensure that it does not deform under long-term static load conditions and has a large stress area to avoid stress concentration.

[0173] Exemplarily, the support crossbeam 2B further includes a third crossbeam 2B3. The third crossbeam 2B3 is disposed at a position of the support frame 1B close to the frame edge, and a fitting groove 2B31 is formed on the third crossbeam 2B3. The end of the support longitudinal beam 3B is in limit fitting with the fitting groove 2B31. It can be understood that the function of the fitting groove 2B31 is to provide a stable positioning point for the support longitudinal beam 3B, so that the support longitudinal beam 3B can be accurately fixed during the assembly process and avoid displacement during use. Through this limit fitting method, the overall anti-deformation ability of the frame structure can be improved to a certain extent, making the combination between the support crossbeam 2B and the support longitudinal beam 3B more stable, thereby improving the structural reliability of the heat exchange plate 1 under long-term heat and force conditions.

[0174] Exemplarily, in combination Figure 11 、 Figure 12 , the cross-sectional shapes of the third crossbeam 2B3 and the second crossbeam 2B2 are both "C" shapes. This cross-sectional shape forms a local hem by bending downward, thereby improving the bending stiffness and bearing capacity of the crossbeam without increasing too much material consumption. Compared with a rectangular or flat cross-section, the "C" shaped cross-section can disperse the acting forces from the flow channel plate 7B and external loads to a certain extent, reduce local stress concentration, and enhance the overall stability of the frame. Further, both the third crossbeam 2B3 and the second crossbeam 2B2 adopt a corrugated stamping structure. The corrugated form can form periodic undulations on the surface of the flow channel plate 7B, making the beam body show higher stiffness and stronger anti-deformation ability when受力. Compared with the traditional straight plate structure, the corrugated stamping structure can improve the strength-to-weight ratio to a certain extent, making the support structure B lightweight while ensuring strength, meeting the requirements of new energy vehicle battery packs for low mass and high strength.

[0175] At the same time, after the third crossbeam 2B3 and the second crossbeam 2B2 adopt the "C" shaped corrugated stamping structure, the flat plate is transformed into a three-dimensional structure, greatly increasing the sectional moment of inertia. At the same time, the structural strength is enhanced without increasing the thickness; compared with solid plates, the weights of the third crossbeam 2B3 and the second crossbeam 2B2 are reduced by 30% - 50% under the same bearing capacity; furthermore, the periodic undulations of the "C" shaped corrugated stamping structure can disperse the stress concentration points, reduce the crack risk caused by local overload, and extend the service life of the third crossbeam 2B3 and the second crossbeam 2B2, especially suitable for the vibration environment of the battery cassette (Pack).

[0176] In some embodiments, in combination Figure 6 、 Figure 7 and Figure 8The support frame 1B includes roll-formed side beams 1B1 and roll-formed end beams 1B2, which are perpendicularly connected to each other, thus forming a rectangular frame. Furthermore, the length direction of the support crossbeams 2B is consistent with the length direction of the roll-formed end beams 1B2, and the length direction of the support longitudinal beams 3B is consistent with the length direction of the roll-formed side beams 1B1. Through this orthogonal layout, the support structure B can form a stable rectangular frame skeleton, which is beneficial for the distribution and transfer of overall load. The roll forming process can, to a certain extent, ensure the uniformity and dimensional accuracy of the beam cross-section, thereby enabling the support structure B to maintain stable load-bearing performance under complex working conditions.

[0177] For example, refer to Figure 6 , Figure 7 and Figure 13 The support frame 1B also includes a support plate 1B3, which is positioned along the length of the roll-formed side beam 1B1. The ends of the roll-formed end beam 1B2 and the ends of multiple support beams 2B are connected to the upper surface of the support plate 1B3. As a load-bearing component, the support plate 1B3 enhances the connection stability between the side beams and end beams to a certain extent and provides a reliable support position for the ends of the support beams 2B, thereby improving the overall structural rigidity. This design makes the stress distribution of the support frame 1B more uniform during battery operation, reducing the risk of deformation. Simultaneously, under actual transportation conditions, the support plate 1B3 can directly contact the transport track surface, thus preventing the roll-formed side beam 1B1 and roll-formed end beam 1B2 of the support frame 1B from directly contacting the track surface, improving structural stability during transportation and preventing damage.

[0178] For example, the support plate 1B3 and the roll-formed side beam 1B1 are integrally formed. This integral structure reduces welding or assembly processes, lowers manufacturing complexity, and reduces the risk of cracks or leaks at the connection points. The integrally formed support plate 1B3 has advantages in structural integrity and can improve the overall strength and durability of the support frame 1B to a certain extent.

[0179] Furthermore, combined Figure 7 At least one of the roll-formed side beam 1B1 and the roll-formed end beam 1B2 is provided with a lifting hole 6B. The lifting hole 6B is a through-hole structure that partially penetrates the roll-formed side beam 1B1 or the roll-formed end beam 1B2. Its size and position are optimized to provide a lifting point for the heat exchange plate 1 during assembly or maintenance, while ensuring the strength of the beam. This structural design can improve the convenience and safety of the support structure B during installation to a certain extent and reduce operational risks.

[0180] Exemplarily, the cross-sectional shapes of the roll-formed side beam 1B1 and the roll-formed end beam 1B2 are both "day" shaped. This cross-sectional form forms a hollow channel through a geometric structure with four closed sides, which can significantly improve the bending and torsional stiffness, enabling the support structure B to maintain high stability under large loads. Compared with an open cross-section, the "day" shaped cross-section can better resist deformation under long-term thermal cycling conditions to some extent, which is beneficial to improving the structural reliability of the heat exchange plate 1.

[0181] Furthermore, the material used for manufacturing the roll-formed side beam 1B1 is: HC420 / 780DP cold-rolled high-strength steel, and rectangular holes or notches are opened on the surface of the roll-formed side beam 1B1. It can be understood that through the middle rectangular holes or notches, while reducing the material consumption, high bending resistance is maintained. Under the same load, the roll-formed side beam 1B1 saves about 20%-30% of steel compared with traditional I-beams; the cross-sectional area distribution is more reasonable, the flange-to-web ratio is optimized, and the stiffness-to-weight ratio is improved. It has the advantage of lightweight, reducing the material consumption directly reduces the self-weight, thereby reducing the foundation load and transportation cost.

[0182] Meanwhile, the "day" shaped roll-formed side beam 1B1 can provide greater structural strength and torsional stiffness for the wide-body heat exchange plate 1 of the battery pack (Pack). A waterproof sealing rivet nut is riveted at one end of the roll-formed side beam 1B1, which can be used to lock the cover 3, and a fixed fastening through-hole is opened at the other end of the roll-formed side beam 1B1 for fastening with a large-diameter countersunk head blind rivet screw.

[0183] Exemplarily, combined with Figure 14 , the roll-formed end beam 1B2 is a "day" shaped roll-formed beam, and the material is: HC420 / 780DP cold-rolled high-strength steel. A waterproof sealing rivet nut is riveted at one end of the roll-formed end beam 1B2 for locking the cover 3, and a fixed fastening through-hole is opened at the other end of the roll-formed end beam 1B2 for fastening with a large-diameter countersunk head blind rivet screw. The heat exchange plate 1 reinforcement maintenance frame has high rigidity and strength, which can effectively support the weight and external forces of the entire heat exchange plate 1 system, ensuring its stability and safety under various working conditions.

[0184] Based on this, the roll-formed side beam 1B1 and the roll-formed end beam 1B2, as the enclosure structures, can protect the heat exchange plate 1 from the influence of external impacts, vibrations or collisions, reduce the risk of failures caused by physical damage, and extend the service life of the system. The roll-formed side beam 1B1 and the roll-formed end beam 1B2 have standardized interfaces and an easy-to-dismantle design, which is convenient for the installation, debugging and daily maintenance of the heat exchange plate 1, and improves the operability and convenience of the overall system.

[0185] For example, the roll-formed side beam 1B1 and the roll-formed end beam 1B2 are joined by gas shielded welding. Gas shielded welding is a commonly used welding method that can form a protective gas layer in the molten pool area, reducing metal oxidation and welding defects. This welding method can improve the weld quality and strength of the joint to a certain extent, ensuring a strong bond between the roll-formed side beam 1B1 and the roll-formed end beam 1B2, thereby enhancing the durability of the overall support frame 1B.

[0186] Secondly, combining Figures 1 to 14 This application also provides a battery pack, including the battery compartment of the first aspect.

[0187] For example, the battery pack also includes battery cells, a plurality of which are arranged within the enclosure frame 2 along the length of the heat exchange surface 11.

[0188] Thirdly, combining Figures 1 to 14 This application also provides an electrical device, including a battery pack as described in the second aspect.

[0189] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0190] The electrical equipment may be a portable electronic product, an energy storage device, a transportation vehicle, an industrial equipment, a household appliance, or other electrically driven device, etc., and this application does not specifically limit it.

[0191] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0192] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0193] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0194] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery cabinet, characterized in that, Comprising: A heat exchange plate (1) having a heat exchange surface (11), the heat exchange surface (11) being configured to be adhered to an electric core; A surrounding frame (2) connected to the heat exchange surface (11); and, A box cover (3) connected to a side of the surrounding frame (2)背离 the heat exchange surface (11), and configured to jointly enclose an installation space for storing an electric core with the surrounding frame (2) and the heat exchange plate (1).

2. The battery cabinet according to claim 1, characterized in that, The surrounding frame (2) includes surrounding side beams (21), the surrounding side beams (21) being connected to long side edges of the heat exchange surface (11) along the length direction of the heat exchange plate (1).

3. The battery cabinet of claim 2, wherein, The surrounding frame (2) further includes surrounding end beams (22), the surrounding end beams (22) being connected to wide side edges of the heat exchange surface (11) along the width direction of the heat exchange plate (1).

4. The battery cabinet of claim 3, wherein, The surrounding side beams (21) and the surrounding end beams (22) are perpendicularly connected and are both hollow.

5. The battery cabinet of claim 3, wherein, The surrounding side beams (21) and the surrounding end beams (22) are welded and joined by gas shielded welding.

6. The battery cabinet of claim 3, wherein, The cross-sectional shape of at least one of the surrounding side beams (21) and the surrounding end beams (22) is a "day" shape.

7. The battery cabinet of claim 3, wherein, The heat exchange plate (1) is provided with a water inlet nozzle (6A1) and a water outlet nozzle (6A2), an external connection surface (111) is formed between the surrounding end beam (22) and the wide side edge of the heat exchange surface (11), and both the water inlet nozzle (6A1) and the water outlet nozzle (6A2) are located on the external connection surface (111).

8. The battery cabinet according to any one of claims 3 to 7, characterized in that, A fixed cross beam (4) is connected to the heat exchange surface (11) of the heat exchange plate (1), and the length direction of the fixed cross beam (4) is the same as the length direction of the surrounding end beam (22).

9. The battery cabinet of claim 1, wherein, The heat exchange plate (1) includes a flow channel plate (A), the flow channel plate (A) including: A plate body (1A); A return flow channel (2A), at least two of which are arranged in parallel on the plate body (1A); An inlet liquid flow channel (3A) and an outlet liquid flow channel (4A), both arranged on the plate body (1A) and connected to the plurality of return flow channels (2A), the inlet liquid flow channel (3A) being configured to guide the cooling medium to be divided and then enter the plurality of return flow channels (2A), and the outlet liquid flow channel (4A) being configured to collect the cooling medium flowing out of the plurality of return flow channels (2A).

10. The battery cabinet of claim 9, wherein, The return flow channel (2A) includes a connected inflow section (2A1) and an outflow section (2A2), one end of the inflow section (2A1) far from the outflow section (2A2) is connected to the inlet liquid flow channel (3A), and one end of the outflow section (2A2) far from the inflow section (2A1) is connected to the outlet liquid flow channel (4A).

11. The battery cabinet of claim 10, wherein, The inflow section (2A1) is a counterclockwise flow channel, and the inflow section (2A1) includes multiple circles of continuously shrinking counterclockwise sub-flow channels, the outflow section (2A2) is a clockwise flow channel, and the outflow section (2A2) includes multiple circles of continuously expanding clockwise sub-flow channels; Or, the inlet flow section (2A1) is a clockwise flow channel, and the inlet flow section (2A1) comprises multiple clockwise sub-flow channels which are continuously reduced in size; the outlet flow section (2A2) is an anticlockwise flow channel, and the outlet flow section (2A2) comprises multiple anticlockwise sub-flow channels which are continuously enlarged in size.

12. The battery cabinet of claim 10, wherein, The inlet flow section (2A1) and the outlet flow section (2A2) are staggered layer by layer along the thickness direction of the plate body (1A).

13. The battery cabinet of claim 10, wherein, The communication part of the inlet flow section (2A1) and the outlet flow section (2A2) is in an "S" shape; or, the communication part of the inlet flow section (2A1) and the outlet flow section (2A2) is in a "U" shape.

14. The battery cabinet of claim 10, wherein, The liquid inlet flow channel (3A) is provided with a first separation part (3A1), and the first separation part (3A1) separates the liquid inlet flow channel (3A) into a liquid inlet first branch (3A2) and a liquid inlet second branch (3A3) which are in communication.

15. The battery cabinet of claim 14, wherein, The liquid outlet flow channel (4A) is provided with a second separation part (4A1), and the second separation part (4A1) separates the liquid outlet flow channel (4A) into a liquid outlet first branch (4A2) and a liquid outlet second branch (4A3) which are in communication.

16. The battery cabinet of claim 15, wherein, The liquid inlet first branch (3A2) and the liquid inlet second branch (3A3) are parallel and have the same width; and / or, the liquid outlet first branch (4A2) and the liquid outlet second branch (4A3) are parallel and have the same width.

17. The battery cabinet of claim 15, wherein, The meandering flow channel (2A) is provided with multiple support parts (2A3) which are arranged at intervals along the extension direction of the meandering flow channel (2A).

18. The battery cabinet of claim 17, wherein, The multiple support parts (2A3) separate the meandering flow channel (2A) into at least two sub-branches (2A4), and the at least two sub-branches (2A4) are parallel and have the same width.

19. The battery cabinet of claim 17, wherein, At least one of the multiple corners of the meandering flow channel (2A) is a round corner transition.

20. The battery cabinet of claim 17, wherein, The communication part of the liquid inlet flow channel (3A) and the inlet flow section (2A1) is provided with a reinforcing part (5A); and / or, the communication part of the liquid outlet flow channel (4A) and the outlet flow section (2A2) is provided with a reinforcing part (5A).

21. The battery cabinet of claim 20, wherein, The reinforcing part (5A) is distributed at intervals with the first separation part (3A1), the second separation part (4A1) and the support part (2A3).

22. The battery cabinet according to any one of claims 9 to 20, characterized in that, The flow channel plate (A) further comprises a flat plate (6A) which is connected to the plate body (1A) to cover the meandering flow channel (2A), the liquid inlet flow channel (3A) and the liquid outlet flow channel (4A), and the heat exchange surface (11) is arranged on the flat plate (6A).

23. The battery cabinet of claim 22, wherein, The flat plate (6A) and the flow channel plate (A) are connected by brazing.

24. The battery cabinet of claim 22, wherein, Multiple brazing overflow holes (7A) are arranged on the flat plate (6A) and the flow channel plate (A) correspondingly.

25. The battery cabinet of claim 22, wherein, The water inlet nozzle (6A1) of the heat exchange plate (1) is in communication with the liquid inlet flow channel (3A), and the water outlet nozzle (6A2) of the heat exchange plate (1) is in communication with the liquid outlet flow channel (4A).

26. The battery cabinet of claim 9, wherein, The heat exchange plate (1) further comprises a support structure (B) which is connected to the lower surface of the flow channel plate (A), and the support structure (B) comprises: a support frame (1B). A support main beam (X) is arranged on the support frame (1B); A support member (5B) is arranged on the support main beam (X), and the support member (5B) is configured to abut against the flow channel plate (A) and avoid the meandering flow channel (2A), the liquid inlet flow channel (3A), and the liquid outlet flow channel (4A) of the flow channel plate (A), and the meandering flow channel (2A), the liquid inlet flow channel (3A), and the liquid outlet flow channel (4A) jointly form a cooling flow channel (8A).

27. The battery cabinet of claim 26, wherein, The support main beam (X) comprises support cross beams (2B), and a plurality of support cross beams (2B) are arranged along the length direction of the support frame (1B), and the length direction of the support cross beam (2B) is consistent with the width direction of the support frame (1B).

28. The battery cabinet of claim 27, wherein, The support cross beam (2B) comprises a first cross beam (2B1), and the first cross beam (2B1) passes through the center line of the support frame (1B) along the length direction thereof.

29. The battery cabinet of claim 28, wherein, The support main beam (X) further comprises a support longitudinal beam (3B), and the support longitudinal beam (3B) is connected to the support frame (1B) and a plurality of support cross beams (2B), and the length direction of the support longitudinal beam (3B) is consistent with the length direction of the support frame (1B).

30. The battery cabinet of claim 29, wherein, Further comprising a limiting member (4B), and the limiting member (4B) comprises a first limiting portion (4B1), and at least two first limiting portions (4B1) are arranged on the first cross beam (2B1) at intervals, and a first mounting gap (4B11) is formed between adjacent first limiting portions (4B1), and the support longitudinal beam (3B) is mounted in the first mounting gap (4B11).

31. The battery cabinet of claim 30, wherein, The first limiting portion (4B1) is configured to abut against the flow channel plate (A) and avoid the cooling flow channel (8A) of the flow channel plate (A).

32. The battery cabinet of claim 30, wherein, A plurality of transverse reinforcing ribs (2B11) are arranged on the first cross beam (2B1) along the length direction of the first cross beam (2B1), the transverse reinforcing ribs (2B11) are distributed in a staggered manner with the first limiting portion (4B1), and the transverse reinforcing ribs (2B11) avoid the first mounting gap (4B11).

33. The battery cabinet of claim 30, wherein, The support longitudinal beam (3B) is provided with a limiting groove (3B1), and the limiting groove (3B1) is configured to limit and fit with the first limiting portion (4B1).

34. The battery cabinet of claim 30, wherein, The support longitudinal beam (3B) is further provided with a longitudinal reinforcing rib (3B2) along the length direction of the support longitudinal beam (3B).

35. The battery cabinet of claim 34, wherein, The support cross beam (2B) further comprises a second cross beam (2B2), and the second cross beam (2B2) is arranged on the support frame (1B), and a plurality of second cross beams (2B2) are arranged in parallel on both sides of the first cross beam (2B1).

36. The battery cabinet of claim 35, wherein, The limiting member (4B) further comprises a second limiting portion (4B2), and a plurality of second limiting portions (4B2) are arranged on the support longitudinal beam (3B), and the second limiting portion (4B2) is configured to limit and fit with the second cross beam (2B2).

37. The battery cabinet of claim 36, wherein, A second mounting gap (2B21) is arranged on the second cross beam (2B2) along the length direction of the second cross beam (2B2), and the second limiting portion (4B2) is embedded in the second mounting gap (2B21).

38. The battery cabinet of claim 36, wherein, The second limiting portion (4B2) is configured as a protrusion protruding from a part of the support longitudinal beam (3B) toward the side背离 the flow channel plate (A).

39. The battery cabinet of any one of claims 26 to 38, wherein, The support member (5B) includes a first support portion (5B1). A plurality of the first support portions (5B1) are provided on the support cross beam (2B) and the support longitudinal beam (3B). The first support portion (5B1) is configured to abut against the plate surface of the flow channel plate (A) after avoiding the cooling flow channel (8A).

40. The battery cabinet of claim 39, wherein, The first support portion (5B1) provided on the support cross beam (2B) is a protrusion protruding from the support cross beam (2B) toward the side靠近 the flow channel plate (A); and / or, the first support portion (5B1) provided on the support longitudinal beam (3B) is a protrusion protruding from the support longitudinal beam (3B) toward the side靠近 the flow channel plate (A).

41. The battery cabinet of claim 39, wherein, The support member (5B) includes a second support portion (5B2). The length direction of the second support portion (5B2) is perpendicular to the length direction of the second cross beam (2B2). The second support portion (5B2) is configured to abut against the plate surface of the flow channel plate (A) after avoiding the cooling flow channel (8A).

42. The battery enclosure of any one of claims 36 to 38, wherein, The support cross beam (2B) further includes a third cross beam (2B3). The third cross beam (2B3) is provided at the frame edge of the support frame (1B)靠近 the support frame (1B). A fitting groove (2B31) is formed on the third cross beam (2B3). The end of the support longitudinal beam (3B) is fitted and limited in the fitting groove (2B31).

43. The battery cabinet of claim 42, wherein, The cross-sectional shapes of the third cross beam (2B3) and the second cross beam (2B2) are both "几"-shaped.

44. The battery cabinet of claim 42, wherein, Both the third cross beam (2B3) and the second cross beam (2B2) are corrugated stamping formed structures.

45. The battery enclosure of any one of claims 28 to 38, wherein, The support frame (1B) includes a roll-pressed side beam (1B1) and a roll-pressed end beam (1B2). The roll-pressed side beam (1B1) and the roll-pressed end beam (1B2) are perpendicularly connected to each other. The length direction of the support cross beam (2B) is consistent with the length direction of the roll-pressed end beam (1B2). The length direction of the support longitudinal beam (3B) is consistent with the length direction of the roll-pressed side beam (1B1).

46. The battery cabinet of claim 45, wherein, The support frame (1B) further includes a support plate (1B3). The support plate (1B3) is provided on the roll-pressed side beam (1B1) along the length direction of the roll-pressed side beam (1B1). The ends of the roll-pressed end beam (1B2) and the ends of a plurality of the support cross beams (2B) are both connected to the upper surface of the support plate (1B3).

47. The battery cabinet of claim 46, wherein, The support plate (1B3) and the roll-pressed side beam (1B1) are integrally formed.

48. The battery cabinet of claim 45, wherein, At least any one of the roll-pressed side beam (1B1) and the roll-pressed end beam (1B2) is provided with a lifting hole (6B).

49. The battery cabinet of claim 45, wherein, The cross-sectional shapes of the roll-pressed side beam (1B1) and the roll-pressed end beam (1B2) are both "日"-shaped.

50. The battery cabinet of claim 45, wherein, The roll-pressed side beam (1B1) and the roll-pressed end beam (1B2) are welded and joined by gas shielded welding.

51. A battery pack, comprising: Including the battery insertion box according to any one of claims 1 to 50.

52. The battery pack of claim 51, wherein, Also included is an electric core arranged in a plurality along the length direction of the heat exchange surface (11) within the enclosure frame (2).

53. An electrical device, comprising: The battery pack of claim 51 or 52 is included.

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