Battery box body structure and battery pack

Abstract

The utility model relates to a battery box body structure which comprises a box body frame, a liquid cooling plate, a bottom protection plate, a sealing strip and a plurality of fasteners, the space between the head of each fastener and the liquid cooling plate is coated with the sealant, and the sealant can effectively cover the gap between the fastener and the liquid cooling plate, so that a better sealing effect can be achieved between the fastener and the liquid cooling plate. Furthermore, the bottom protection plate wraps the fastener in a sealing mode, the bottom protection plate and the liquid cooling plate are connected in a sealing mode through a sealing strip, a closed space can be formed between the bottom protection plate and the liquid cooling plate, and therefore the fastener is effectively isolated from the outside. Therefore, by forming the two sealing structures, even if the battery box structure encounters strong vibration or collision, external liquid is not easy to enter the battery box structure from the gap between the bottom protection plate and the liquid cooling plate or the gap between the fastener and the liquid cooling plate, so that the sealing performance of the battery box structure is remarkably improved. In addition, the utility model further provides a battery pack.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery box structure and battery pack. Background Technology

[0002] Most commercially available power batteries have a liquid cooling plate at the bottom of the casing. This plate is secured to the casing frame using a flow drill screw (FDS) process, and a layer of sealant is applied between the liquid cooling plate and the casing frame to create a seal. When the battery is subjected to impacts or strong vibrations, gaps can easily form between the FDS screw head and the liquid cooling plate, causing the seal to fail. In this case, external liquids can easily enter the casing through the gap between the FDS screw head and the liquid cooling plate, posing a risk to the battery. Utility Model Content

[0003] Therefore, it is necessary to provide a battery box structure and battery pack with better sealing performance to address the above problems.

[0004] A battery enclosure structure includes an enclosure frame, a liquid cooling plate, a bottom protective plate, a sealing strip, and a plurality of fasteners; the liquid cooling plate covers the enclosure frame, the bottom protective plate is fixed to the enclosure frame, and the sealing strip is clamped between the bottom protective plate and the liquid cooling plate; the plurality of fasteners pass through the liquid cooling plate and are connected to the enclosure frame, and each fastener passes through the sealing strip;

[0005] The fastener head is covered with sealant between itself and the liquid cooling plate, and the bottom protective plate seals the fastener head on the side facing the liquid cooling plate.

[0006] In one embodiment, the bottom guard plate has multiple recesses corresponding to the multiple fasteners, the head of each fastener is received in the corresponding recess, and the edge of the recess is sealed to the sealing strip.

[0007] In one embodiment, an adhesive layer is provided between the liquid cooling plate and the housing frame.

[0008] In one embodiment, the liquid cooling plate includes two stacked flow channel plates, and a plurality of mounting holes are provided on one of the flow channel plates facing the bottom guard plate. The fasteners are FDS screws, each of which passes through the corresponding mounting hole and through the other flow channel plate facing away from the bottom guard plate to be screwed to the housing frame.

[0009] In one embodiment, the housing frame is provided with a plurality of rivet nuts, the liquid cooling plate is formed with a plurality of clearance holes exposing the plurality of rivet nuts respectively, the sealing strip is formed with a plurality of through holes exposing the plurality of rivet nuts respectively, each rivet nut is inserted through the through hole and the clearance hole, and a fastening bolt is inserted through the bottom guard plate and screwed into the rivet nut to seal and fix the bottom guard plate to the housing frame.

[0010] In one embodiment, a sealing ring is clamped between the first riveting surface of the rivet nut facing the housing frame and the housing frame.

[0011] In one embodiment, the rivet nut is spaced apart from the fastener, and the inner surface of the bottom guard plate abuts against the second riveting surface of the rivet nut facing away from the housing frame, so that the inner surface of the bottom guard plate compresses the sealing strip to seal the perforation and the recess.

[0012] In one embodiment, the edge of the bottom protective plate is bent toward the side facing the liquid cooling plate to form a flange, and the included angle between the flange and the side of the housing frame decreases toward the direction away from the bottom protective plate; the distance between the flange and the side of the housing frame is 1.5mm≤S≤3mm.

[0013] In one embodiment, the flange is provided with a plurality of leakage grooves spaced apart along the extension direction of the flange; the leakage grooves are misaligned with the fasteners.

[0014] A battery pack includes a battery and a battery housing structure as described in any of the preferred embodiments above, wherein the battery is housed within the battery housing structure.

[0015] In the aforementioned battery housing structure, each fastener head is coated with sealant between itself and the liquid cooling plate. This sealant effectively covers the gap between the fastener and the liquid cooling plate, providing a good seal. Furthermore, the bottom protective plate seals the fasteners, and the bottom protective plate is sealed to the liquid cooling plate via a sealing strip, creating a closed space between them and effectively isolating the fasteners from the outside. Therefore, by forming two sealing structures, even under strong vibration or impact, external liquids are less likely to enter the battery housing structure through the gap between the bottom protective plate and the liquid cooling plate or the gap between the fasteners and the liquid cooling plate. Thus, the sealing performance of the battery housing structure is significantly improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0017] Figure 1 This is an exploded view of the battery box structure in a preferred embodiment of the present invention;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the battery box structure shown;

[0019] Figure 3 for Figure 1 Top view of the battery box structure shown;

[0020] Figure 4 for Figure 3 The battery box structure shown is a cross-sectional view along BB.

[0021] Figure 5 for Figure 4 An enlarged schematic diagram of part C in the cross-sectional view of the battery box structure shown;

[0022] Figure 6 for Figure 4 An enlarged schematic diagram of part D in the cross-sectional view of the battery box structure shown;

[0023] Figure 7 for Figure 3 The battery housing structure shown is a cross-sectional view along EE. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] This utility model discloses a battery pack and a battery housing structure. The battery pack includes the battery housing structure and a battery, with the battery housed within the battery housing structure. The battery pack provides electrical energy to an electrical device, and the battery housing structure protects the battery. The electrical device can be a vehicle, spacecraft, electric toy, power tool, energy storage device, or amusement equipment, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, or electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. Energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc. Amusement equipment can be carousels, drop towers, etc.

[0031] For new energy vehicles, the aforementioned battery pack can serve as a driving power source, thereby replacing fossil fuels to provide propulsion. The battery typically comprises multiple individual battery cells, which can be connected in series, parallel, or a combination of both to form a module placed within the battery housing structure, or they can be directly installed within the battery housing structure without modules. The individual battery cells can be lithium-ion, sodium-ion, or magnesium-ion batteries, and their external contours can be cylindrical, flat, cuboid, or other shapes, but are not limited to these.

[0032] Please see Figure 1 and Figure 2 The battery box structure 100 in the preferred embodiment of this utility model includes a box frame 110, a liquid cooling plate 120, a bottom protective plate 130, a sealing strip 140, and fasteners 150.

[0033] The housing frame 110 forms a ring-shaped structure, with its upper and lower ends extending through it. The housing frame 110 is generally formed from sheet metal, possessing high mechanical strength, and serves as the skeleton of the battery housing structure 100. A liquid cooling plate 120 covers the housing frame 110. Specifically, in this embodiment, an adhesive layer 160 is provided between the liquid cooling plate 120 and the housing frame 110. (See adhesive layer 160...) Figure 5 The adhesive layer 160 is bonded to the housing frame 110, and forms a seal between the liquid cooling plate 120 and the housing frame 110. During assembly, the adhesive layer 160 can effectively fix the liquid cooling plate 120 to the housing frame 110, thereby positioning and limiting the liquid cooling plate 120, and facilitating the fastening operation of the liquid cooling plate 120. After assembly, the adhesive layer 160, once cured, can fill the gap between the liquid cooling plate 120 and the housing frame 110, thus also providing a better sealing effect.

[0034] Obviously, in other embodiments, a seal can also be formed between the liquid cooling plate 120 and the housing frame 110 in other ways. For example, interlocking sealing steps can be machined on the contact surfaces of the liquid cooling plate 120 and the housing frame 110, or a sealing gasket can be directly provided between the liquid cooling plate 120 and the housing frame 110 to achieve a sealing effect.

[0035] Specifically, the liquid cooling plate 120, which covers the housing frame 110, can close the lower end of the housing frame 110. The battery housing structure 100 generally also includes a top cover (not shown) and other structures, which can close the upper end of the housing frame 110, thereby enclosing a storage space for accommodating the battery.

[0036] Cooling channels are formed within the liquid cooling plate 120, through which coolant can flow to exchange heat with the battery within the housing space, thereby achieving temperature control of the battery. Specifically, in this embodiment, the liquid cooling plate 120 includes two stacked channel plates 120a (see...). Figure 5 At least one flow channel plate 120a has a groove formed thereon, and the groove can form the cooling flow channel after two flow channel plates 120a are stacked, making the forming process more convenient.

[0037] The enclosure frame 110, liquid cooling plate 120, and bottom protective plate 130 are stacked sequentially from top to bottom. The bottom protective plate 130 is fixed to the enclosure frame 110, and a sealing strip 140 is clamped between the bottom protective plate 130 and the liquid cooling plate 120. The bottom protective plate 130 is generally made of metal and provides protection for the liquid cooling plate 120. The sealing strip 140 is annular and extends along the edges of the bottom protective plate 130 and the liquid cooling plate 120, providing a seal between them to prevent liquids and impurities from entering through the gap and corroding or damaging the liquid cooling plate 120, thus improving the safety and stability of the liquid cooling plate 120.

[0038] Please refer to the following: Figure 3 , Figure 4 and Figure 5 Multiple fasteners 150 penetrate the liquid cooling plate 120 and connect to the housing frame 110, thus fixing the liquid cooling plate 120 to the housing frame 110 via the fasteners 150, thereby further improving the connection stability of the liquid cooling plate 120. Each fastener 150 has a sealant 151 covering its head and the liquid cooling plate 120. The tip of the fastener 150 penetrates the liquid cooling plate 120 and the housing frame 110 from bottom to top, while the head of the fastener 150 is located at the end of the liquid cooling plate 120 facing away from the housing frame 110. After the fasteners 150 fix the liquid cooling plate 120 to the housing frame 110, sealant 151 can be applied to the head of the fastener 150 and cured to form the sealant 151. Alternatively, a pre-formed cap-shaped sealant 151 can be fitted onto the head of the fastener 150 and used to hold it against the liquid cooling plate 120. The sealant 151 can effectively cover the gap between the liquid cooling plate 120 and the fastener 150, thereby providing a good seal between the fastener 150 and the liquid cooling plate 120 to prevent liquid from entering the battery box structure 100 along the fastener 150.

[0039] Furthermore, the bottom protective plate 130 seals and covers the head of the fastener 150 on the side facing the liquid cooling plate 120. In other words, the heads of multiple fasteners 150 can be covered and sealed by the bottom protective plate 130, thereby sealing the fasteners. At the same time, the heads of the fasteners 150 are not exposed, and the bottom protective plate 130 can better protect the sealant 151 on the heads of the fasteners 150, so as to avoid the sealant 151 being affected by external impacts.

[0040] Specifically, in this embodiment, the bottom protective plate 130 has multiple recesses 131 corresponding to multiple fasteners 150. The head of each fastener 150 is received within the corresponding recess 131, and the edge of the recess 131 is sealed to the sealing strip 140. The recesses 131 provide space for the fasteners 150, and the multiple fasteners 150 are surrounded by the sealing strip 140 and pressed and covered by the edge of the recesses 131, thereby achieving a seal on the bottom protective plate 130.

[0041] Specifically, a recess 131 can be formed on the side of the bottom protective plate 130 facing the liquid cooling plate 120 by stamping, while a protrusion 131 can be formed on the side of the bottom protective plate 130 facing away from the liquid cooling plate 120. This also helps to improve the structural strength of the bottom protective plate 130.

[0042] Furthermore, each fastener 150 passes through the sealing strip 140. That is, the sealing strip 140 is relatively wide, and it has multiple through holes (not shown in the figure) for the fasteners 150 to pass through, so each fastener 150 is surrounded by the sealing strip 140. Therefore, the sealing strip 140, together with the bottom protective plate 130 and the liquid cooling plate 120, forms a seal along the circumference of the fastener 150, creating a sealed space between the bottom protective plate 130 and the liquid cooling plate 120, thereby effectively isolating the fastener 150 from the outside.

[0043] Specifically, the sealing strip 140, in cooperation with the bottom protective plate 130 and the liquid cooling plate 120, can seal the bottom protective plate 130 and the liquid cooling plate 120 at the edge of each recess 131, thereby forming a sealed space in each recess 131 to isolate the corresponding fastener 150. It can be seen that two sealing structures are formed in the area where the fastener 150 is located. Even when subjected to strong vibration or impact, external liquid is not easily allowed to enter the interior of the battery housing structure 100 through the gap between the fastener 150 and the liquid cooling plate 120, thus significantly improving the sealing performance of the battery housing structure 100.

[0044] Specifically, in this embodiment, the fastener 150 is set as an FDS screw. The FDS screw passes through the liquid cooling plate 120 and is screwed to the housing frame 110, which can increase the area of ​​threaded connection with the liquid cooling plate 120 and the housing frame 110, thereby helping to improve the reliability of assembly.

[0045] The cooling plate 120 has multiple mounting holes 121 on one of its flow channel plates 120a facing the bottom protective plate 130, with each fastener 150 corresponding to one mounting hole 121. The flow channel plate 120a facing away from the bottom protective plate 130 does not have any mounting holes 121. The diameter of the mounting holes 121 is slightly larger than the diameter of the FDS screw. When fixing the liquid cooling plate 120 to the housing frame 110, the FDS screw first passes through the corresponding mounting hole 121 and then through the flow channel plate 120a on the other side until it is screwed into the housing frame 110. When penetrating the flow channel plate 120a on the other side, the FDS screw drills through it and generates waste material. The mounting holes 121 serve to discharge this waste material and also facilitate pre-positioning, improving installation efficiency and preventing misalignment.

[0046] Please refer to the following: Figure 6In this embodiment, a plurality of rivet nuts 170 are provided on the housing frame 110, a plurality of clearance holes 122 are formed on the liquid cooling plate 120 to expose the plurality of rivet nuts 170 respectively, and a plurality of through holes (not shown in the figure) are formed on the sealing strip 140 to expose the plurality of rivet nuts 170 respectively. Each rivet nut 170 passes through the through hole and the clearance hole 122, and the fastening bolt 180 passes through the bottom guard plate 130 and is screwed into the rivet nut 170 to seal and fix the bottom guard plate 130 to the housing frame 110.

[0047] Specifically, the fastening bolt 180 passes through the outside of the bottom cover plate 130, with the bolt head abutting against the bottom cover plate 130, thereby pressing the bottom cover plate 130 and the liquid cooling plate 120 onto the housing frame 110 for fixation. The clearance hole 122 is a closed hole, which can be a round hole or a square hole, and its diameter is slightly larger than the outer diameter of the rivet nut 170. The rivet nut 170 provides a fixing position for the fastening bolt 180 and, when used with the fastening bolt 180, facilitates the disassembly of the bottom cover plate 130.

[0048] Since the rivet nuts 170 pass through the holes of the sealing strip 140, that is, each rivet nut 170 is surrounded by the sealing strip 140 and fixed by the fastening bolts 180, thus being compressed and clamped between the liquid cooling plate 120 and the bottom guard plate 130, the sealing strip 140 can form a seal along the circumference of the rivet nuts 170, resulting in a better sealing effect and thus improving the reliability of the seal between the rivet nuts 170 and the housing frame 110.

[0049] It should be noted that in other embodiments, the bottom guard plate 130 can also be fixedly connected to the box frame 110 by means of snap-fit ​​or other methods.

[0050] Furthermore, in this embodiment, please refer to Figure 6 A sealing ring 190 is held between the first riveting surface of the rivet nut 170 facing the housing frame 110 and the housing frame 110. The first riveting surface refers to the surface where the rivet nut 170 abuts against the housing frame 110. The sealing ring 190 can form a seal between the rivet nut 170 and the housing frame 110, thereby adding a sealing structure to further improve the reliability of the seal between the rivet nut 170 and the housing frame 110.

[0051] Furthermore, in this embodiment, the rivet nut 170 and the fastener 150 are spaced apart, and the inner surface of the bottom guard plate 130 abuts against the second riveting surface of the rivet nut 170 facing away from the housing frame 110, so that the inner surface of the bottom guard plate 130 compresses the sealing strip 140 to seal the perforation and the recess 131. The second riveting surface of the bottom guard plate 130 and the rivet nut 170 is pressed together by the fastening bolt 180, thereby sealing the rivet nut 170 to a certain extent and effectively preventing external liquid from seeping in along the second riveting surface of the rivet nut 170. By compressing the sealing strip 140 and sealing the perforation by the fastening bolt 180, the gap between the rivet nut 170 and the perforation can be effectively eliminated. Since the rivet nut 170 and the fastener 150 are spaced apart, that is, they are arranged adjacent to each other, while the fastening bolt 180 compresses the sealing strip 140, it can also seal the edge of the recess 131 of the fastener 150, thereby sealing the fastener 150 and improving its sealing reliability.

[0052] Please refer to it again. Figure 2 See also Figure 7 In this embodiment, the edge of the bottom protective plate 130 is bent toward the side facing the liquid cooling plate 120 to form a flange 133. The flange 133 extends beyond the liquid cooling plate 120 to protect the liquid cooling plate 120.

[0053] Furthermore, the angle between the flange 133 and the side of the housing frame 110 decreases in the direction away from the bottom guard plate 130, which reduces the cross-sectional area of ​​the inlet formed between the edge of the bottom guard plate 130 and the side of the housing frame 110, thereby further preventing liquid from entering between the bottom guard plate 130 and the liquid cooling plate 120.

[0054] Specifically, the distance S between the flange 133 and the side of the housing frame 110 is less than or equal to 3mm to avoid excessive liquid accumulation due to an excessively large inlet area. The distance S between the flange 133 and the side of the housing frame 110 is greater than or equal to 1.5mm to prevent corrosion of dissimilar metals. At the same time, the flange 133 extends circumferentially along the bottom guard plate 130, which can also improve the structural strength of the bottom guard plate 130.

[0055] Furthermore, since water may accumulate inside the flange 133 after it is installed, there is a risk of inward seepage once the water reaches a certain level. To avoid this problem, in this embodiment, the flange 133 is provided with multiple drainage grooves 1331 spaced apart along the extension direction of the flange 133. In this way, liquid entering the flange 133 can be discharged from the drainage grooves 133 in a timely manner, avoiding severe water accumulation. The drainage grooves 1331 are located on the edge of the flange 133 away from the center of the bottom protective plate 120, which facilitates processing and also facilitates the rapid drainage of accumulated water.

[0056] Furthermore, in this embodiment, please refer again...Figure 2 The leakage groove 1331 and the fastener 150 are misaligned, and the fastening bolts 180 of the leakage groove 1331 are correspondingly set.

[0057] Specifically, the bottom protective plate 130 has multiple bolt holes 134 for fastening bolts 180 to pass through. The bolt holes 134 are spaced apart between two recesses 131. The recesses 131 correspond to the fasteners 150. Multiple drainage grooves 1331 are aligned with the multiple bolt holes 134 respectively. The drainage grooves 1331 and the fasteners 150 are staggered along the extension direction of the edge of the bottom protective plate 130. That is to say, the edge of the bottom protective plate 130 between two adjacent bolt holes 134 is continuous and will not be interrupted by the drainage grooves 1331. Therefore, it helps to ensure the connection strength between the two fastening bolts 180, improves the reliability of the connection of the bottom protective plate 130, and avoids the influence of the drainage grooves 1331 on the sealing connection of the recesses 131.

[0058] In the aforementioned battery housing structure 100, the head of each fastener 150 is covered with sealant 151 between itself and the liquid cooling plate 120. The sealant 151 effectively covers the gap between the fastener 150 and the liquid cooling plate 120, thus providing a good seal. Furthermore, each fastener 150 is inserted through a sealing strip 140, meaning each fastener 150 is surrounded by the sealing strip 140. The sealing strip 140 compresses with the bottom protective plate 130 and the liquid cooling plate 120, forming a sealed space between them, effectively isolating the fastener 150 from the outside. As can be seen, by forming a multi-layer sealing structure, even when subjected to strong vibration or collision, external liquid is not easily allowed to enter the interior of the battery box structure 100 through the gap between the bottom guard plate 130 and the liquid cooling plate 120 or the gap between the fastener 150 and the liquid cooling plate 120. Therefore, the sealing performance of the battery box structure 100 is significantly improved.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery housing structure (100), characterized in that, The enclosure includes a housing frame (110), a liquid cooling plate (120), a bottom protective plate (130), a sealing strip (140), and multiple fasteners (150). The liquid cooling plate (120) covers the housing frame (110), the bottom protective plate (130) is fixed to the housing frame (110), and the sealing strip (140) is clamped between the bottom protective plate (130) and the liquid cooling plate (120). Multiple fasteners (150) pass through the liquid cooling plate (120) and are connected to the housing frame (110), and each fastener (150) passes through the sealing strip (140). The head of the fastener (150) is covered with sealant (151) between it and the liquid cooling plate (120), and the bottom protective plate (130) seals the head of the fastener (150) on the side facing the liquid cooling plate (120).

2. The battery housing structure (100) according to claim 1, characterized in that, The bottom guard plate (130) has a plurality of recesses (131) corresponding to the plurality of fasteners (150), the head of each fastener (150) is received in the corresponding recess (131), and the edge of the recess (131) is sealed to the sealing strip (140).

3. The battery housing structure (100) according to claim 1, characterized in that, An adhesive layer (160) is provided between the liquid cooling plate (120) and the box frame (110).

4. The battery housing structure (100) according to claim 1, characterized in that, The liquid cooling plate (120) includes two stacked flow channel plates (120a), and a plurality of mounting holes (121) are provided on one of the flow channel plates (120a) facing the bottom guard plate (130). The fasteners (150) are configured as FDS screws, each of the FDS screws passing through the corresponding mounting hole (121) and through the other flow channel plate (120a) facing away from the bottom guard plate (130) to be screwed to the housing frame (110).

5. The battery housing structure (100) according to claim 2, characterized in that, The housing frame (110) is provided with a plurality of rivet nuts (170), the liquid cooling plate (120) is formed with a plurality of clearance holes (122) exposing the plurality of rivet nuts (170), the sealing strip (140) is formed with a plurality of through holes exposing the plurality of rivet nuts (170), each rivet nut (170) passes through the through hole and the clearance hole (122), and the fastening bolt (180) passes through the bottom guard plate (130) and is screwed with the rivet nut (170) to seal and fix the bottom guard plate (130) to the housing frame (110).

6. The battery housing structure (100) according to claim 5, characterized in that, A sealing ring (190) is clamped between the first riveting surface of the rivet nut (170) facing the housing frame (110) and the housing frame (110).

7. The battery housing structure (100) according to claim 5, characterized in that, The rivet nut (170) and the fastener (150) are spaced apart. The inner surface of the bottom guard plate (130) abuts against the second riveting surface of the rivet nut (170) facing away from the box frame (110), so that the inner surface of the bottom guard plate (130) compresses the sealing strip (140) to seal the perforation and the recess (131).

8. The battery housing structure (100) according to claim 1, characterized in that, The edge of the bottom guard plate is bent toward the side facing the liquid cooling plate to form a flange (133), and the included angle between the flange (133) and the side of the box frame (110) decreases in the direction away from the bottom guard plate (130). The distance between the flange (133) and the side of the box frame (110) is 1.5mm≤S≤3mm.

9. The battery housing structure (100) according to claim 8, characterized in that, The flange (133) has a plurality of leakage grooves (1331) spaced apart along the extension direction of the flange (133); the leakage grooves (1331) are offset from the fasteners (150).

10. A battery pack, characterized in that, Includes a battery and a battery housing structure (100) as described in any one of claims 1 to 9, wherein the battery is housed within the battery housing structure (100).

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