A battery system

Abstract

The utility model discloses a battery system, including a plurality of layering setting battery box, and battery box includes: top cover, bottom plate, side frame and first connecting piece, and bottom plate and top cover are opposite setting, side frame includes first base body and extension, and first base body sets up between top cover and bottom plate and is connected top cover and bottom plate, and first base body, top cover and bottom plate surround and form and have the accommodation cavity, and top cover is connected with the top surface of first base body away from bottom plate, and extension sets up in the one end of first base body away from top cover, and extension covers and sets up in the top cover of adjacent battery box, and first connecting piece is connected in extension and the top cover of adjacent battery box. The battery system aims at solving the technical problem that the appearance of the stacked energy storage product is poor, and the stacking stability is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery system. Background Technology

[0002] Currently, battery systems are widely used in power peak shaving, renewable energy grid connection, and emergency power supply. Stacked energy storage products, as a modular design, are widely used due to their convenient installation and flexible expansion. High-voltage stacking and low-voltage stacking structures often employ a method of directly stacking energy storage units one on top of the other. In existing stacked battery systems, each energy storage unit typically consists of a housing and a cover. The modules are secured by stacking the housing on top of the cover, using the weight of the housing and the cells within.

[0003] However, from an aesthetic perspective, the existing stacking products have separate outlines for the cabinet and lid, resulting in two distinct outlines on the side after stacking, leading to an overall visually inconsistent and unattractive appearance. Because the cabinet and lid are manufactured separately, slight deviations in size and color exist. When these deviations appear on the main exterior surfaces, they can create a discontinuous impression, affecting the perceived quality of the product. Secondly, regarding structural performance, the existing stacking method struggles to maintain stability under lateral forces, potentially causing upper cabinets to misalign or even fall, posing a safety hazard. Therefore, it is necessary to optimize the stacking structure to improve its overall aesthetics and stability. Utility Model Content

[0004] One objective of this invention is to provide a battery system that addresses the technical problems of poor aesthetics and insufficient stacking stability in stacked energy storage products.

[0005] To achieve the above objectives, the present invention provides a solution as follows: a battery system comprising multiple stacked battery housings, each battery housing comprising: a top cover, a bottom plate, a side frame, and a first connector, wherein the bottom plate and the top cover are disposed opposite to each other; the side frame comprises a first base and an extension, wherein the first base is disposed between the top cover and the bottom plate and connects the top cover and the bottom plate, the first base, the top cover, and the bottom plate form a receiving cavity, the top cover is connected to the top surface of the first base away from the bottom plate, the extension is disposed at the end of the first base away from the top cover, and the extension covers the top cover of the adjacent battery housing; the first connector is connected to the extension and the top cover of the adjacent battery housing.

[0006] Optionally, outside the receiving cavity, the side frame and top cover are provided to form a clearance opening, a clearance channel and a waterproof channel. One end of the waterproof channel is connected to the receiving cavity and the other end is connected to the clearance channel. The clearance opening is opposite to the extension of the adjacent battery box.

[0007] The battery system includes a sealing portion located in a waterproof channel and sandwiched between a top cover and a first substrate.

[0008] Optionally, the side frame includes multiple bends, the first base and the multiple bends are connected by bending in sequence, the bends are located on the side of the first base away from the bottom plate, the bends and the top cover form a clearance opening, a clearance channel and a waterproof channel, the bends are located between the receiving cavity and the clearance channel, and the extension overlaps with the bends of the adjacent battery box.

[0009] Optionally, the top cover includes a second base and a reinforcing part, the second base and the reinforcing part are bent and connected, the second base and the bent part form a waterproof channel, the reinforcing part and the bent part form a clearance channel and a clearance opening, and a first connector passes through the clearance channel to connect the reinforcing part, the bent part and the extension of the adjacent battery box.

[0010] Optionally, the battery system includes a second connector that passes through a waterproof channel to connect the top cover, the seal, and the bend.

[0011] Optionally, in the direction perpendicular to the extension, the maximum distance between the bend and the extension is D1, 20 mm ≤ D1 ≤ 25 mm.

[0012] Optionally, the length of the waterproof channel is L1 in the direction perpendicular to the extension, where L1 ≥ 15 mm.

[0013] Optionally, in the direction perpendicular to the base plate, the maximum height of the clearance channel is H1, where H1 ≥ 15 mm.

[0014] Optionally, the distance between the top cover and the adjacent bottom plate along the direction perpendicular to the bottom plate is D2, where 0.2 mm ≤ D2 ≤ 0.8 mm.

[0015] Optionally, along the direction perpendicular to the base plate, the minimum distances between the first connector and the opposite side walls of the clearance channel are D3 and D4, respectively, where D3 ≥ 7.5 mm and D4 ≥ 7.5 mm.

[0016] Optionally, the battery housing includes a first protective part and a second protective part. The first protective part is connected to the top cover, and the second protective part is connected to the bottom plate. The first protective part is inserted into the second protective part of the adjacent battery housing. The first protective part has a through hole for the wire harness to pass through. The distance between the outer wall of the first protective part and the inner wall of the second protective part is D5, where 1.7 mm ≤ D5 ≤ 4.3 mm.

[0017] Optionally, the side frame includes a welded part, which is connected to the inner wall of the first substrate, and the bottom plate is welded to the first substrate through the welded part.

[0018] The beneficial effects of this utility model are as follows: The battery system includes multiple stacked battery housings. Each battery housing includes a top cover, a bottom plate, a side frame, and a first connector. The bottom plate and the top cover are positioned opposite each other. The side frame includes a first base and an extension. The first base is positioned between the top cover and the bottom plate and connects the top cover and the bottom plate. The first base, the top cover, and the bottom plate form a receiving cavity. The top cover is connected to the top surface of the first base away from the bottom plate. The extension is positioned at the end of the first base away from the top cover and covers the top cover of the adjacent battery housing. The first connector connects the extension and the top cover of the adjacent battery housing.

[0019] The extension covers the top cover of adjacent battery boxes, ensuring a uniform appearance when the battery boxes are stacked, forming only a continuous outer contour line. This avoids misalignment and gaps caused by manufacturing errors in the boxes and covers, which are common in traditional stacking methods, significantly improving the overall integrity and aesthetics. Secondly, the connection between the extension and the top cover of the adjacent battery boxes is achieved through a first connector, forming a stable and reliable mechanical connection during battery system stacking. This prevents structural loosening due to weight-based stacking or displacement and detachment under lateral forces, improving the overall stability and safety of the stacked structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the battery system provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the overall structure of the battery system provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the battery system provided in an embodiment of the present invention; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region B in the middle; Figure 6 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region C.

[0022] Explanation of icon numbers: 20. Top cover; 21. Second base; 22. Reinforcing part; 30. Base plate; 40. Side frame; 41. First base; 42. Extension; 43. Bending part; 44. Welding part; 50. Receiving cavity; 60. Displacement opening; 70. Displacement channel; 80. Waterproof channel; 90. Sealing part; 100. First connector; 110. Second connector; 120. First protective part; 1201. Through hole; 130. Second protective part; 140. Direction perpendicular to the extension; 150. Direction perpendicular to the base plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the overall structure of the battery system provided in this embodiment of the utility model. Figure 2 This is a schematic diagram of the overall structure of the battery system provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the cross-sectional structure of the battery system provided in an embodiment of the present invention. Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region A in the middle. Figure 5 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region B in the middle.

[0025] This utility model provides a battery system comprising multiple stacked battery housings. Each battery housing includes a top cover 20, a bottom plate 30, a side frame 40, and a first connector 100. The bottom plate 30 and the top cover 20 are disposed opposite to each other. The side frame 40 includes a first base 41 and an extension 42. The first base 41 is disposed between the top cover 20 and the bottom plate 30 and connects the top cover 20 and the bottom plate 30. The first base 41, the top cover 20, and the bottom plate 30 form a receiving cavity 50. The top cover 20 is connected to the top surface of the first base 41 away from the bottom plate 30. The extension 42 is disposed at one end of the first base 41 away from the top cover 20 and covers the top cover 20 of the adjacent battery housing. The first connector 100 is connected to the extension 42 and the top cover 20 of the adjacent battery housing.

[0026] In practical applications, the extension 42 covers the top cover 20 of the adjacent battery box, ensuring that when the battery boxes are stacked, only a continuous outer contour line is formed between adjacent battery boxes. This avoids misalignment and gaps caused by manufacturing errors in the boxes and covers in traditional stacking methods, significantly improving the integrity and aesthetics of the overall appearance. Secondly, the connection between the extension 42 and the top cover 20 of the adjacent battery box is achieved through the first connector 100, which forms a stable and reliable mechanical connection during the battery system stacking process. This prevents structural loosening caused by stacking based solely on its own weight or displacement and detachment under lateral external forces, improving the overall stability and safety of the stacked structure. Thirdly, the improved stability of the stacked structure reduces the need to rely on increasing the weight of the boxes or adding auxiliary fixing structures to ensure stability, as is done in traditional designs, thus helping to reduce the system weight.

[0027] Further, see Figure 4 and Figure 5 Outside the receiving cavity 50, the side frame 40 and the top cover 20 form a clearance opening 60, a clearance channel 70, and a waterproof channel 80. One end of the waterproof channel 80 communicates with the receiving cavity 50, and the other end communicates with the clearance channel 70. The clearance opening 60 is opposite to the extension 42 of the adjacent battery box. The battery system includes a sealing part 90, which is located in the waterproof channel 80 and sandwiched between the top cover 20 and the first base 41.

[0028] In practical applications, since manufacturing errors are inevitable in parts, a clearance opening 60 is provided between the top cover 20 and the side frame 40 to compensate for these manufacturing errors. This prevents interference between the top cover 20 and the side frame 40, ensuring proper assembly and reducing the precision requirements of the top cover 20 and the side frame 40, thus lowering manufacturing costs. In the attached diagram, the clearance opening 60 appears relatively high; in reality, it is equivalent to a smaller gap. In high-humidity or rainy environments, when external water seeps into the battery system casing through the gap between the extension 42 and the adjacent battery box top cover 20, the water is first guided to the clearance opening 60 and then enters the clearance channel 70. Since the clearance channel 70 is spaced apart from the receiving cavity 50 by a waterproof channel 80, and the height of the waterproof channel 80 is higher than both the clearance opening 60 and the clearance channel 70, water will preferentially accumulate gradually in the clearance channel 70. Only when the water level in the clearance channel 70 rises to the same level as the waterproof channel 80 can the water continue to flow into the waterproof channel 80, thus slowing down the speed at which the water directly enters the receiving cavity 50 and forming a water flow buffer barrier. Furthermore, a sealing part 90 is provided inside the waterproof channel 80. The sealing part 90, sandwiched between the top cover 20 and the first base 41, effectively seals the waterproof channel 80, making it difficult for water to penetrate into the receiving cavity 50 even if it reaches the waterproof channel 80. The combination of the water storage design of the clearance channel 70 and the sealing design of the waterproof channel 80 significantly improves the battery system's protection against rainwater or moisture intrusion, reducing the risk of short circuits, corrosion, or insulation degradation of internal components caused by moisture entering the receiving cavity 50. This significantly enhances the safety and reliability of the battery system under harsh environmental conditions and extends the system's service life.

[0029] In this embodiment, the material of the sealing part 90 can be EPDM rubber, silicone rubber, fluororubber, or polyurethane sealant, etc.

[0030] Further, see Figure 4 and Figure 5 The side frame 40 includes multiple bends 43. The first base 41 and the multiple bends 43 are connected by bending in sequence. The bends 43 are located on the side of the first base 41 away from the bottom plate 30. The bends 43 and the top cover 20 form a clearance opening 60, a clearance channel 70 and a waterproof channel 80. The bends 43 are located between the receiving cavity 50 and the clearance channel 70. The extension 42 overlaps with the bends 43 of the adjacent battery box.

[0031] In practical applications, by setting multiple bends 43 on the side frame 40 and sequentially bending and connecting the first base 41 with the multiple bends 43, the bends 43 can be located on the side of the first base 41 away from the bottom plate 30, and together with the top cover 20, form a clearance opening 60, a clearance channel 70, and a waterproof channel 80, thus naturally forming a flow path to guide external water infiltration. Specifically, the bends 43 are located between the receiving cavity 50 and the clearance channel 70, which can effectively isolate water from the receiving cavity 50, prevent water from directly infiltrating the receiving cavity 50, and improve the protection capability of the internal cells and components. At the same time, the multiple bends 43 are connected by bending, which can significantly improve the overall structural strength and deformation resistance of the side frame 40, further enhancing the stability and durability of the battery box during stacking and use. Furthermore, since the extension 42 overlaps with the bent portion 43 of the adjacent battery box, the upper and lower battery boxes can form a reliable overlapping fit when stacked, thereby further improving the overall connection stability and sealing performance of the battery system.

[0032] Optionally, see Figure 4 and Figure 5 The top cover 20 includes a second base 21 and a reinforcing part 22. The second base 21 and the reinforcing part 22 are bent and connected. The second base 21 and the bent part 43 form a waterproof channel 80. The reinforcing part 22 and the bent part 43 form a clearance channel 70 and a clearance opening 60. The first connector 100 passes through the clearance channel 70 to connect the reinforcing part 22, the bent part 43 and the extension 42 of the adjacent battery box.

[0033] In practical applications, the first connector 100 passes through the clearance channel 70 and connects the reinforcing part 22, the bent part 43, and the extension part 42 of the adjacent battery box, forming a stable and robust connection structure between the parts, effectively improving the reliability of the stacked connection between the upper and lower boxes. Because the reinforcing part 22 and the second base 21 are bent and connected, not only can the strength and rigidity of the top cover 20 in a localized area be enhanced, preventing deformation of the top cover 20 due to stress, but it can also ensure the dimensional stability of the waterproof channel 80 and the clearance channel 70, reducing the possibility of gaps between the inner wall of the waterproof channel 80 and the sealing part 90 caused by structural deformation, thereby maintaining good waterproof performance.

[0034] Optionally, see Figure 5 The battery system includes a second connector 110, which passes through a waterproof channel 80 to connect the top cover 20, the sealing part 90, and the bending part 43.

[0035] In practical applications, by setting a second connector 110 in the waterproof channel 80 and having the second connector 110 pass through the top cover 20, the sealing part 90, and the bending part 43, the top cover 20, the sealing part 90, and the bending part 43 are reliably connected together. This effectively compresses the sealing part 90, enhances the tight contact between the sealing part 90 and the top cover 20 and the bending part 43, improves the sealing performance of the waterproof channel 80, and prevents moisture from seeping into the receiving cavity 50 through the connection area. On the other hand, connecting the top cover 20, the sealing part 90, and the bending part 43 can further improve the overall structural strength, enhance the connection between the top cover 20 and the side frame 40, and improve the battery system's ability to resist external impacts and vibrations in a stacked state, thereby improving the overall environmental protection performance and mechanical reliability of the battery system.

[0036] In one embodiment, reference is made to Figure 5 In the direction perpendicular to the extension 140, the maximum distance between the bending part 43 and the extension 42 is D1, 20 mm ≤ D1 ≤ 25 mm.

[0037] In practical applications, when the spacing D1 is larger, the lengths of the clearance channel 70 and the waterproof channel 80 increase accordingly, resulting in a larger volume for the clearance channel 70 and the ability to store more water. A smaller spacing makes the battery system structure more compact, reducing the overall size and improving space utilization. This enhances the system's mechanical strength, reduces complexity, and improves the stability and resistance to lateral forces when the battery packs are stacked. Therefore, the optimal selection of the maximum spacing D1 from the bend 43 to the extension 42 strikes a balance between optimizing space utilization and enhancing stacking stability, thus improving the overall performance of the battery system.

[0038] Optionally, refer to Figure 4 Along the direction perpendicular to the extension 140, the length of the waterproof channel 80 is L1, and L1≥15 mm.

[0039] In practical applications, the length L1 of the waterproof channel 80 along the direction perpendicular to the extension 140 affects the waterproof capability of the battery system. When the length L1 of the waterproof channel 80 is large, the waterproof channel 80 can effectively extend the path of water passage and increase the time water stays in the channel, thereby further improving the waterproof performance of the battery system. A longer waterproof channel 80 can better prevent water from entering the receiving cavity 50, effectively preventing water from directly contacting the battery components and enhancing the battery system's protection capability in high humidity or water-intrusion environments. Conversely, a shorter length L1 of the waterproof channel 80 increases the speed at which water passes through the waterproof channel 80, which may not effectively prevent water from entering, thus reducing waterproof performance. However, a shorter waterproof channel 80 length makes the structure more compact, reduces system complexity, and helps improve the production efficiency of the battery system and reduce manufacturing costs.

[0040] Optionally, refer to Figure 4 In the direction perpendicular to the base plate, the maximum height of the clearance channel 70 is H1, where H1 ≥ 15 mm.

[0041] In practical applications, the maximum height H1 of the clearance channel 70 in the direction perpendicular to the base plate (150°) directly affects the waterproof performance and water storage capacity of the battery system. When H1 increases, the volume of the clearance channel 70 increases, allowing it to hold more water and prolonging the water's residence time within it, thereby improving the battery system's water isolation and protection capabilities. A larger H1 effectively prevents external moisture from entering the battery system through the clearance opening 60 and provides more space for the waterproof channel 80, further enhancing the waterproof effect. Furthermore, increasing H1 helps reduce the risk of water rapidly passing through the channel, thus preventing direct water penetration into the battery assembly and reducing the likelihood of the battery becoming damp.

[0042] However, a smaller H1 results in a smaller volume of the clearance channel 70, reducing the amount of water that can be stored. This could make it easier for water to enter the battery system through the clearance port 60. While a smaller H1 might allow for a more compact battery system, facilitating a reduction in overall battery size and improving production efficiency and manufacturing costs, it would limit waterproofing capabilities, especially in high-humidity or rainy environments, where water could easily enter the containment cavity 50, increasing the risk of the battery becoming damp or short-circuited.

[0043] Optionally, refer to Figure 5 Along a direction perpendicular to the base plate 150, the distance between the top cover 20 and the base plate 30 of the adjacent battery box is D2, 0.2 mm ≤ D2 ≤ 0.8 mm.

[0044] In practical applications, the primary purpose of setting the distance D2 between the top cover 20 and the base plate 30 of the adjacent battery box in the direction perpendicular to the base plate (150°) is to provide appropriate error allowance for the installation and assembly process of the battery system. When D2 is increased, the larger gap can better accommodate dimensional deviations or installation errors that may occur during production, ensuring smooth assembly of the battery box under different production batches or assembly environments, and avoiding assembly difficulties or interference between components due to dimensional inaccuracies. A larger D2 can improve the assembly tolerance rate, avoid poor contact or mechanical stress concentration caused by errors, thereby improving the overall assembly quality.

[0045] However, a smaller D2 allows for a more compact battery system, reducing unnecessary gaps, improving structural stability, and effectively lowering production costs. A smaller D2 requires more precise manufacturing processes and assembly, potentially placing higher demands on the accuracy of production equipment and the skill level of assembly personnel. However, it also helps reduce unnecessary space waste and improves the space utilization rate of the battery system.

[0046] Optionally, refer to Figure 5 Along a direction 150 perpendicular to the base plate, the minimum distances between the opposite side walls of the first connector 100 and the clearance channel 70 are D3 and D4, respectively, where D3 ≥ 7.5 mm and D4 ≥ 7.5 mm.

[0047] In practical applications, the minimum distances D3 and D4 between the first connector 100 and the clearance channel 70 relative to the two side walls in the direction 150 perpendicular to the base plate are primarily intended to reserve sufficient space for installing the first connector 100, ensuring its correct and stable installation in the battery system. Specifically, increasing D3 and D4 provides more ample installation space, offering more operational space for the installation of the first connector 100 and avoiding installation difficulties or instability caused by insufficient space. Furthermore, the increased space can accommodate potential manufacturing errors, thereby improving installation accuracy and reliability.

[0048] On the other hand, when D3 and D4 are reduced, the installation space for the first connector 100 becomes more compact, which helps to make the overall structure of the battery system more compact and more integrated, reducing unnecessary space occupation and thus improving space utilization. However, if the reduction is too large, it may affect the smooth installation of the first connector 100, especially since errors that are difficult to completely avoid during the manufacturing process may lead to inconvenience or instability in installation, thereby affecting the overall performance of the battery system.

[0049] Optionally, refer to Figure 1 , Figure 2 and Figure 5 The battery box includes a first protective part 120 and a second protective part 130. The first protective part 120 is connected to the top cover 20, and the second protective part 130 is connected to the bottom plate 30. The first protective part 120 is inserted into the second protective part 130 of the adjacent battery box. The first protective part 120 has a through hole 1201 for wire harness to pass through. The distance between the outer wall of the first protective part 120 and the inner wall of the second protective part 130 is D5, where 1.7 mm ≤ D5 ≤ 4.3 mm.

[0050] In practical applications, within battery systems, the design of the first protection unit 120 and the second protection unit 130 plays a crucial role in protecting the connectors in adjacent battery housings. Specifically, the first protection unit 120 and the second protection unit 130 achieve a stable connection between battery housings through a plug-in design, and the reasonable setting of the spacing D5 ensures a tight fit and reliable fixation between the battery housings, thereby effectively preventing damage to the connectors due to external forces during installation or use.

[0051] The structural design of the first protection section 120 and the second protection section 130 allows for blind mating during assembly, simplifying the installation process and improving installation efficiency. Furthermore, by setting a reasonable range for D5, it is possible to accommodate manufacturing tolerances and installation errors while ensuring connector protection, ensuring adequate protection for the connector and preventing unnecessary damage to the connector caused by relative movement between battery housings.

[0052] Optionally, refer to Figure 5 and Figure 6 The side frame 40 includes a welding part 44, which is connected to the inner wall of the first base 41. The bottom plate 30 is welded to the first base 41 through the welding part 44.

[0053] In practical applications, in battery systems, due to the thinness of the first substrate 41, direct welding may lead to burn-through during the welding process. Therefore, a welding part 44 is designed, which is connected to the inner wall of the first substrate 41 and firmly connects the base plate 30 to the first substrate 41 through welding, thereby reducing the risk of burn-through of the first substrate 41.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0055] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0056] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0057] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery system, characterized in that, The battery system includes multiple stacked battery housings; The battery housing includes: Top cover; A base plate, wherein the base plate and the top cover are disposed opposite to each other; The side frame includes a first base and an extension. The first base is disposed between the top cover and the bottom plate and connects the top cover and the bottom plate. The first base, the top cover and the bottom plate surround and form a receiving cavity. The top cover is connected to the top surface of the first base away from the bottom plate. The extension is disposed at one end of the first base away from the top cover and covers the top cover of the adjacent battery box. A first connector is connected to the extension and the top cover adjacent to the battery housing.

2. The battery system according to claim 1, characterized in that, Outside the receiving cavity, the side frame and the top cover form a clearance opening, a clearance channel and a waterproof channel. One end of the waterproof channel is connected to the receiving cavity and the other end is connected to the clearance channel. The clearance opening is opposite to the extension of the adjacent battery box. The battery system includes a sealing portion located in the waterproof channel and sandwiched between the top cover and the first substrate.

3. The battery system according to claim 2, characterized in that, The side frame includes multiple bends, the first base and the multiple bends are connected by bending in sequence, the bends are located on the side of the first base away from the bottom plate, the bends and the top cover surround to form the clearance opening, the clearance channel and the waterproof channel, the bends are located between the receiving cavity and the clearance channel, and the extension overlaps with the bends of the adjacent battery box.

4. The battery system according to claim 3, characterized in that, The top cover includes a second base and a reinforcing part, the second base and the reinforcing part are bent and connected, the second base and the bent part form the waterproof channel, and the reinforcing part and the bent part form the clearance channel and the clearance opening; The first connector passes through the clearance channel to connect the reinforcement, the bend, and the extension of the adjacent battery housing.

5. The battery system according to claim 3, characterized in that, The battery system includes a second connector that passes through the waterproof channel to connect the top cover, the sealing portion, and the bending portion.

6. The battery system according to claim 3, characterized in that, In the direction perpendicular to the extension, the maximum distance between the bent portion and the extension is D1, 20 mm ≤ D1 ≤ 25 mm.

7. The battery system according to claim 3, characterized in that, Along the direction perpendicular to the extension, the length of the waterproof channel is L1, where L1 ≥ 15 mm.

8. The battery system according to claim 2, characterized in that, In the direction perpendicular to the base plate, the maximum height of the clearance channel is H1, where H1 ≥ 15 mm.

9. The battery system according to claim 1, characterized in that, Along a direction perpendicular to the base plate, the distance between the top cover and the adjacent base plate is D2, where 0.2 mm ≤ D2 ≤ 0.8 mm.

10. The battery system according to claim 4, characterized in that, Along the direction perpendicular to the base plate, the minimum distances between the first connector and the opposite side walls of the clearance channel are D3 and D4, respectively, where D3 ≥ 7.5 mm and D4 ≥ 7.5 mm.

11. The battery system according to any one of claims 1 to 10, characterized in that, The battery housing includes a first protective part and a second protective part. The first protective part is connected to the top cover, and the second protective part is connected to the bottom plate. The first protective part is inserted into the second protective part of the adjacent battery housing. The first protective part has a through hole for wire harness to pass through. The distance between the outer wall of the first protective part and the inner wall of the second protective part is D5, where 1.7 mm ≤ D5 ≤ 4.3 mm.

12. The battery system according to any one of claims 1 to 10, characterized in that, The side frame includes a welded part, which is connected to the inner wall of the first substrate, and the bottom plate is welded to the first substrate through the welded part.

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