Battery system and electric device

Abstract

The utility model provides a kind of battery system and electrical equipment, battery system includes multiple battery packs, high pressure box and charging seat, high pressure box includes box and high voltage circuit, high voltage circuit is installed in box, high voltage circuit is electrically connected with multiple battery packs, charging seat is installed in box and is electrically connected with high voltage circuit, charging seat is used to be electrically connected with charging gun.Such, it is realized that charging seat and high pressure box integrated body setting, reduce the length of connecting line between charging seat and high voltage circuit, reduce line complexity, make electrical system layout more succinct order, and improve electrical transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to battery systems and electrical equipment. Background Technology

[0002] In related technologies, battery systems include battery packs, high-voltage boxes, and charging sockets. However, the charging sockets and high-voltage boxes are located far apart, resulting in long wiring harnesses connecting the high-voltage boxes and charging sockets, leading to low electrical transmission efficiency. Utility Model Content

[0003] The embodiments of this utility model provide a battery system and electrical equipment that can improve the technical problem of long wiring harnesses and low electrical transmission efficiency in the direct connection between the high voltage box and the charging base in related technologies.

[0004] In a first aspect, embodiments of the present invention provide a battery system.

[0005] In one embodiment, the battery system includes: Multiple battery packs; A high-voltage box includes a box body and a high-voltage circuit, wherein the high-voltage circuit is installed in the box body and is electrically connected to a plurality of battery packs; A charging dock is installed in the housing and electrically connected to the high-voltage circuit. The charging dock is used to electrically connect to the charging gun.

[0006] In one embodiment, the plurality of battery packs are stacked along a first direction; Along the first direction, the high-voltage box is located on one side of the stacked battery packs and is connected to the adjacent battery pack.

[0007] In this embodiment of the invention, the spatial layout of the battery system is further optimized, making the entire battery system more compact, reducing the gaps between multiple battery packs and the high-voltage box, and improving space utilization. Furthermore, the high-voltage box is connected to adjacent battery packs, shortening the length of electrical connection lines. Shorter connection lines reduce line resistance, lower energy loss, and improve the efficiency of the battery system. The simplified electrical connections also reduce the probability of line faults, minimizing electrical failures caused by line aging, wear, or poor contact, thus improving the reliability of the battery system.

[0008] In one embodiment, the first direction is arranged parallel to the direction of gravity; The high-voltage box is located at the bottom of the stacked battery packs.

[0009] In this embodiment of the invention, this layout conforms to mechanical principles. The gravity of the battery pack makes the entire stacked structure more stable, reducing the risk of the battery pack tipping over or shifting due to external forces. The high-voltage box is located at the bottom of the multiple battery packs, facilitating electrical connections between electrical wiring and other electrical components. This reduces the crossing and tangling of electrical wiring, making the electrical connections neater and more orderly, and lowering the probability of circuit failures. The high-voltage box's location at the bottom also allows maintenance personnel convenient inspection and maintenance.

[0010] In one embodiment, the battery system further includes a mounting bracket, through which the high-voltage box is connected to the adjacent battery pack.

[0011] In embodiments of this invention, when the battery pack and high-voltage box undergo slight deformation due to factors such as temperature changes and charging / discharging processes, the mounting bracket can act as a buffer and adjuster. It can absorb some of the deformation, preventing stress concentration at the connection points caused by deformation, thereby protecting the connection structure of the high-voltage box and battery pack from damage and maintaining the normal operation of the electrical system. When maintenance or replacement of the high-voltage box or battery pack is required, the design of the mounting bracket makes disassembly more convenient. Simply loosen the connecting bolts or other fixing devices between the mounting bracket and the high-voltage box or battery pack to remove the high-voltage box or battery pack from the mounting bracket, without the need for large-scale disassembly of other components, reducing maintenance costs and time. The mounting bracket can provide a reasonable routing channel and fixed position for electrical connection lines, making the electrical lines neater and more orderly. This helps reduce mutual interference and wear between lines, improving the reliability and safety of electrical connections.

[0012] In one embodiment, the mounting bracket includes: Two mounting plates are arranged opposite each other and spaced apart along the first direction. One of the two mounting plates is connected to the adjacent battery pack, and the other of the two mounting plates is connected to the high-voltage box. Multiple connecting arms are located between the two mounting plates, and the multiple connecting arms are spaced apart circumferentially along the battery pack. The two ends of each connecting arm are respectively connected to the two mounting plates.

[0013] In this embodiment of the invention, two mounting plates are positioned opposite each other and spaced apart, connected by multiple connecting arms to form a stable frame structure that protects the high-voltage box. The connecting arms are spaced apart along the circumference of the battery pack, allowing forces to be evenly distributed across the two mounting plates, avoiding localized stress concentration and further enhancing the stability of the mounting frame structure. This mounting frame structure creates a space between the battery pack and the high-voltage box, facilitating airflow and heat dissipation design.

[0014] In one embodiment, the plurality of battery packs include a first battery pack and a second battery pack at both ends, and a plurality of third battery packs between the first battery pack and the second battery pack. The plurality of third battery packs include a first type of battery pack, a second type of battery pack, and a third type of battery pack. The first type of battery pack is connected in series with the first battery pack to form a first electrical branch, and the second type of battery pack is connected in series to form a second electrical branch. Alternatively, at least one of the first type of battery pack and the third type of battery pack is connected in series with the second type of battery pack to form a second electrical branch, and the third type of battery pack is connected in series with the second battery pack to form a third electrical branch. The first electrical branch, the second electrical branch, and the third electrical branch are all electrically connected to the high-voltage circuit.

[0015] In the embodiments of this utility model, the first electrical branch, the second electrical branch, and the third electrical branch are made independent of each other. When a fault occurs in one electrical branch (such as a short circuit or overheating of the battery pack), it will not affect the normal operation of other electrical branches, thus achieving fault isolation. This redundant design improves the reliability of the battery system and reduces the risk of the entire battery system being paralyzed due to a local fault.

[0016] In one embodiment, it further includes a fuse, wherein at least one of the first electrical branch, the second electrical branch, and the third electrical branch is provided with the fuse; and / or, The battery system also includes a manual maintenance switch, and at least one of the first electrical branch, the second electrical branch, and the third electrical branch is equipped with the manual maintenance switch.

[0017] In this embodiment of the invention, the fuse is a current protection device. When the current in at least one of the first, second, and third electrical branches exceeds its rated value, the fusible element inside the fuse of the corresponding branch quickly melts, thereby cutting off the corresponding electrical branch and preventing electrical faults caused by overcurrent. The timely cutting off of the corresponding electrical branch by the fuse during overcurrent effectively prevents the continuous accumulation of heat and reduces the risk of electrical fires.

[0018] Furthermore, during battery system maintenance, repair, or component replacement, the manual maintenance switch can quickly disconnect at least one of the first, second, and third electrical branches, de-energizing the corresponding branch. This significantly reduces the risk of electric shock to operators and ensures personal safety. The manual maintenance switch can promptly disconnect the corresponding circuit, preventing electrical short circuits and arcing caused by misoperation or equipment malfunction during maintenance.

[0019] In one embodiment, each of the battery packs includes a housing body having an opening, and the bottom of the housing body of one of two adjacent battery packs is adapted to cover the opening of the housing body of the other. The battery system also includes a cover for concealing an opening in the end of the main body of the casing.

[0020] In this embodiment of the invention, the need to cover each opening is avoided, making the stacked battery pack structure more compact and reducing the dimensions of the stacked battery packs. This allows for the stacking of more battery packs within a limited space, increasing energy density. The bottom of one main body of the battery pack covers the opening of another, and the cover covers the openings at the ends of the main body. This design effectively prevents external impurities such as dust and moisture from entering the battery pack, extending battery life.

[0021] Secondly, embodiments of this utility model provide an electrical device.

[0022] In one embodiment, the electrical device includes a battery system as described above.

[0023] In one embodiment, the electrical equipment further includes a vehicle.

[0024] In one embodiment, each of the battery packs has an electrical compartment and a battery compartment, arranged from the front to the rear of the vehicle, with the electrical compartment and the battery compartment spaced apart.

[0025] The beneficial effects of the embodiments of this utility model are as follows: In this embodiment of the invention, the high-voltage circuit is installed in the high-voltage box housing and electrically connected to multiple battery packs. This design ensures the reliability and stability of the connection between the high-voltage circuit and the battery packs. The housing provides physical protection for the high-voltage circuit, reducing the impact of external environmental factors on the circuit connection and lowering the probability of faults such as poor contact and short circuits. The charging dock is installed in the high-voltage box housing and electrically connected to the high-voltage circuit. As an interface with the charging gun, the charging dock enables a reliable connection between the vehicle and external charging equipment. The connection between the charging dock and the high-voltage circuit makes the electrical signal transmission during the charging process more stable, enabling real-time monitoring of charging status, such as charging current and voltage parameters, ensuring that the charging process is carried out within a safe range. The installation of the charging dock in the housing and its electrical connection to the high-voltage circuit integrates the charging dock and the high-voltage box into a single unit, reducing the length of the connection lines between the charging dock and the high-voltage circuit, reducing wiring complexity, making the electrical system layout more concise and orderly, and improving electrical transmission efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional schematic diagram of the battery system provided in an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of part A shown below; Figure 3 yes Figure 1 Right view of the battery system shown; Figure 4 yes Figure 1 A cross-sectional schematic diagram of the battery system shown. Figure 5 yes Figure 1 A schematic diagram of the structure of multiple main bodies and covers in the battery system shown; Figure 6 This is a schematic diagram of the structure of multiple battery packs electrically connected to a high-voltage box according to an embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures: 10. Battery System; 1. Battery Pack; 11. First Battery Pack; 111. First Cell; 12. Second Battery Pack; 121. Second Cell; 13. Third Battery Pack; 131. Type I Battery Pack; 1311. Type I Cell; 132. Type II Battery Pack; 1321. Type II Cell; 133. Type III Battery Pack; 1331. Type III Cell; 14. Main Body; 141. Opening; 142. Bottom Plate; 143. Side Plate; 1431. Notch; 15. Cover; 16. Electrical Compartment; 17. Battery Compartment; 2. High Voltage Box; 3. Charging Base; 4. Mounting Bracket; 41. Mounting Plate; 42. Connecting Arm; 51. First Electrical Branch; 52. Second Electrical Branch; 53. Third Electrical Branch; 6. Fuse; 7. Manual Maintenance Switch; 8. Welding Groove; 9. Seal; 101. Fastener. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0030] This utility model provides an electrical device, which includes a battery system. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the battery system provided in an embodiment of the present invention.

[0031] It should be noted that the electrical equipment can be energy storage power sources, consumer electronics, medical devices, or smart city applications, etc. Specifically, the electrical equipment in this application may also include vehicles. Of course, in other embodiments, the electrical equipment can be configured as needed.

[0032] Reference Figures 1 to 3 The battery system 10 includes multiple battery packs 1, a high-voltage box 2, and a charging socket 3. The high-voltage box 2 includes a housing and a high-voltage circuit. The high-voltage circuit is installed in the housing and is electrically connected to the multiple battery packs 1. The charging socket 3 is installed in the housing and is electrically connected to the high-voltage circuit. The charging socket 3 is used to electrically connect to the charging gun.

[0033] In this embodiment of the invention, the high-voltage circuit is installed in the high-voltage box 2 and electrically connected to multiple battery packs 1. This design ensures the reliability and stability of the connection between the high-voltage circuit and the battery packs 1. The box provides physical protection for the high-voltage circuit, reducing the impact of external environmental factors on the circuit connection and lowering the probability of faults such as poor contact and short circuits. The charging socket 3 is installed in the high-voltage box 2 and electrically connected to the high-voltage circuit. As an interface with the charging gun, the charging socket 3 enables a reliable connection between the vehicle and external charging equipment. The connection between the charging socket 3 and the high-voltage circuit makes the electrical signal transmission during the charging process more stable, enabling real-time monitoring of charging status, such as charging current and voltage parameters, ensuring that the charging process is carried out within a safe range. The installation of the charging socket 3 in the box and its electrical connection to the high-voltage circuit integrates the charging socket 3 and the high-voltage box 2 into one unit, reducing the length of the connection line between the charging socket 3 and the high-voltage circuit, reducing wiring complexity, making the electrical system layout more concise and orderly, and improving electrical transmission efficiency.

[0034] It should be noted that the number of charging docks 3 can be set as needed; for example, one, two, or more charging docks 3 can be set. Specifically, this application does not limit this.

[0035] Furthermore, in battery systems, the voltage handled by the high-voltage box is typically much higher than that of low-voltage circuits (such as 12V or 24V). For example, when the battery system is used in a vehicle, the high-voltage box may handle several hundred volts or even higher voltages, such as 400V or 800V. This high-voltage design is to meet the high power and high efficiency requirements of vehicles and other equipment. Additionally, the high-voltage box is responsible for distributing the high-voltage electrical energy from the battery pack to various components, such as the drive motor and air conditioning compressor. High-voltage circuits refer to circuits that transmit high-voltage electrical energy.

[0036] In some embodiments, multiple battery packs 1 are stacked along a first direction. This maximizes battery capacity within a limited space. Along the first direction, a high-voltage box 2 is located on one side of the stacked battery packs 1 and connected to adjacent battery packs 1. This further optimizes the spatial layout of the battery system 10, making the entire battery system 10 more compact, reducing the gap between the multiple battery packs 1 and the high-voltage box 2, and improving space utilization. Furthermore, the connection of the high-voltage box 2 to adjacent battery packs 1 shortens the length of electrical connection lines. Shorter connection lines reduce line resistance, lower energy loss, and improve the efficiency of the battery system 10. Simplified electrical connections also reduce the probability of line failures, reducing electrical faults caused by problems such as line aging, wear, or poor contact, thus improving the reliability of the battery system 10.

[0037] In some embodiments, the first direction is parallel to the direction of gravity, and the high-voltage box 2 is located at the bottom of the stacked battery packs 1. This layout conforms to mechanical principles. The gravity of the battery packs 1 makes the entire stacked structure more stable, reducing the risk of the battery packs 1 tipping over or shifting due to external forces. The high-voltage box 2 being at the bottom of the battery packs 1 facilitates electrical connections between electrical wiring and other electrical components, reducing the crossing and tangling of electrical wiring, making electrical connections neater and more orderly, and lowering the probability of circuit failures. The high-voltage box 2 being at the bottom also allows maintenance personnel to easily inspect and maintain it.

[0038] It should be noted that when the battery system 10 is used in a vehicle, there is usually a large space available at the bottom of the vehicle. By stacking multiple battery packs 1 along the direction of gravity and placing the high-voltage box 2 at the bottom of the multiple battery packs 1, the vertical space at the bottom of the vehicle can be fully utilized, improving space utilization and leaving more installation space for other components of the vehicle (such as the power system, suspension system, etc.).

[0039] Reference Figure 1 , Figure 3 as well as Figure 4 In some embodiments, the battery system 10 also includes a mounting bracket 4, through which the high-voltage box 2 is connected to the adjacent battery pack 1. Thus, when the battery pack 1 and high-voltage box 2 undergo slight deformation due to temperature changes, charging and discharging processes, etc., the mounting bracket 4 can act as a buffer and adjust. It can absorb some of the deformation, preventing stress concentration at the connection points caused by deformation, thereby protecting the connection structure of the high-voltage box 2 and battery pack 1 from damage and maintaining the normal operation of the electrical system. When maintenance or replacement of the high-voltage box 2 or battery pack 1 is required, the design of the mounting bracket 4 makes disassembly more convenient. Simply loosen the connecting bolts or other fixing devices between the mounting bracket 4 and the high-voltage box 2 or battery pack 1 to remove the high-voltage box 2 or battery pack 1 from the mounting bracket 4, without the need for large-scale disassembly of other components, reducing maintenance costs and time. The mounting bracket 4 can provide a reasonable routing channel and fixed position for electrical connection lines, making the electrical lines neater and more orderly. This helps reduce mutual interference and wear between lines, improving the reliability and safety of electrical connections.

[0040] It should be noted that the mounting bracket 4 can be designed with specific structures and connection methods according to actual needs, such as using bolt fixing, welding, etc., to further improve the stability and durability of the connection. Specifically, this application does not limit the connection relationship between the mounting bracket 4 and the battery pack 1 and the high-voltage box 2.

[0041] Reference Figure 3 In some embodiments, the mounting frame 4 includes two mounting plates 41 and multiple connecting arms 42. The two mounting plates 41 are arranged opposite to each other and spaced apart along a first direction. One of the two mounting plates 41 is connected to an adjacent battery pack, and the other of the two mounting plates 41 is connected to the high-voltage box 2. The multiple connecting arms 42 are located between the two mounting plates 41 and are spaced apart along the circumference of the battery pack 1. Each connecting arm 42 has its two ends connected to the two mounting plates 41 respectively. Thus, the two mounting plates 41 are arranged opposite to each other and spaced apart, and connected by multiple connecting arms 42, forming a stable frame structure that can protect the high-voltage box 2. The spaced-apart connecting arms 42 along the circumference of the battery pack 1 allow forces to be evenly transmitted to the two mounting plates 41, avoiding local stress concentration and further enhancing the stability of the mounting frame 4 structure. This mounting frame 4 structure creates a certain space between the battery pack 1 and the high-voltage box 2, which is conducive to air circulation and facilitates heat dissipation design.

[0042] It should be noted that the connection method between the mounting plate 41 and the multiple connecting parts can be selected as needed. For example, in one embodiment, the mounting plate 41 and the connecting arm 42 can be detachably connected by fasteners. Fasteners may include screws or rivets. In other embodiments, the mounting plate 41 and the connecting arm 42 can also be welded together. Specifically, this application does not limit this.

[0043] Reference Figure 4 and Figure 6 In some embodiments, the plurality of battery packs 1 include a first battery pack 11 and a second battery pack 12 at both ends, and a plurality of third battery packs 13 between the first battery pack 11 and the second battery pack 12. The plurality of third battery packs 13 include a first type battery pack 131, a second type battery pack 132 and a third type battery pack 133. The first type battery pack 131 is connected in series with the first battery pack 11 to form a first electrical branch 51, and the second type battery pack 132 is connected in series to form a second electrical branch 52. Alternatively, at least one of the first type battery pack 131 and the third type battery pack 133 is connected in series with the second type battery pack 132 to form a second electrical branch 52, and the third type battery pack 133 is connected in series with the second battery pack 12 to form a third electrical branch 53. The first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 are all electrically connected to a high-voltage circuit. In this way, the first electrical branch 51, the second electrical branch 52, and the third electrical branch 53 are independent of each other. When a fault occurs in one electrical branch (such as a short circuit or overheating of the battery pack 1), it will not affect the normal operation of other electrical branches, thus achieving fault isolation. This redundant design improves the reliability of the battery system 10 and reduces the risk of the entire battery system 10 being paralyzed due to a local fault.

[0044] When maintenance is required on the battery system 10, the problematic electrical branch can be inspected and maintained specifically according to the division of the first electrical branch 51, the second electrical branch 52, and the third electrical branch 53, without the need for a comprehensive inspection of the entire battery system 10. This simplifies the maintenance process and reduces maintenance time and workload.

[0045] It should be noted that there are multiple ways to form the second electrical branch 52. For example, in one embodiment, the second type of battery pack 132 can be connected in series to form the second electrical branch 52. In another embodiment, the second type of battery pack 132 and the first type of battery pack 131 can be connected in series to form the second electrical branch 52. In yet another embodiment, the second type of battery pack 132 and the third type of battery pack 133 can be connected in series to form the second electrical branch 52. In other embodiments, the second type of battery pack 132, the first type of battery pack 131, and the third type of battery pack 133 can be connected in series to form the second electrical branch 52. When the second type of battery pack 132 is connected in series to form the second electrical branch 52, the second type of battery pack 132 has at least two third battery packs 13.

[0046] In addition, in the above-described embodiments, the plurality of battery packs 1 form three electrical branches. Certainly, in other embodiments, the plurality of battery packs 1 may also form two electrical branches, four electrical branches, five electrical branches or even more. In addition, the voltages of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 may be the same or different. Specifically, the present application does not limit this.

[0047] It can be understood that the formation of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 is specifically embodied as: the first battery pack 11 has N1 first cells 111, the second battery pack 12 has N2 second cells 121, the first type of battery pack 131 has N3 first-type cells 1311, the second type of battery pack 132 has N4 second-type cells 1321, and the third type of battery pack 133 has N5 third-type cells 1331, where the N1 first cells 111 and N6 first-type cells 1311 are connected in series to form the first electrical branch 51, the N4 second-type cells 1321, N7 first-type cells 1311 and N8 third-type cells 1331 are connected in series to form the second electrical branch 52, the N2 second cells 121 and N9 third-type cells 1331 are connected in series to form the third electrical branch 53, N6+N7=N3, N8+N9=N5, N1, N2, N3, N4, N5 and N6 are integers greater than zero, and N7, N8 and N9 are natural numbers. As such, it may be that N6>0, N7<N3, N8=0, N9=N5, then the N1 first cells 111 and the N6 first-type cells 1311 are connected in series to form the first electrical branch 51. The N4 second-type cells 1321 and the N7 first-type cells 1311 are connected in series to form the second electrical branch 52. The N2 second cells 121 and the N5 third-type cells 1331 are connected in series to form the third electrical branch 53. It may also be that when N6>0, N7<N3, N8>0, N9<N5, then the N1 first cells 111 and the N6 first-type cells 1311 are connected in series to form the first electrical branch 51. The N4 second-type cells 1321, the N7 first-type cells 1311 and the N8 third-type cells 1331 are connected in series to form the second electrical branch 52. The N2 second cells 121 and the N9 third-type cells 1331 are connected in series to form the third electrical branch 53.

[0048] It should be noted that the electric capacities of the above-mentioned first cell 111, second cell 121, first-type cell 1311, second-type cell 1321 and third-type cell 1331 may be the same or different. Specifically, the present application does not limit this.

[0049] In some embodiments, the third battery pack 13 adjacent to the second battery pack 12 has a first surface disposed facing the second battery pack 12, the area of the first surface is S1, the second battery pack 12 is disposed away from the high-voltage box 2, and the projected area of the N2 second cells 121 on the first surface is S2, where 0 < S2 ≤ S1 / 2. In this way, the design of limiting the projected area S2 of the N2 second cells 121 on the first surface of the third battery pack 13 to no more than half of the area S1 of the first surface allows the first surface to accommodate other electrical components, avoiding the need to additionally increase the space required for installing the battery system 10 along the first direction due to insufficient space. In addition, disposing the electrical components on the first surface of the third battery pack 13 can shorten the connection distance between them and the plurality of battery packs 1, reduce the length and complexity of the connection lines, and improve the integration level of the battery system 10.

[0050] It should be noted that S2 / S1 may be 0.2, 0.3, 0.35, 0.4 or 0.5, etc. In other embodiments, the relationship between S2 and S1 may also be defined as required. The present application does not limit this.

[0051] In some embodiments, the battery system 10 further includes a fuse 6, and at least one of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 is provided with the fuse 6. In this way, the fuse 6 is a current protection device. When the current in at least one of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 exceeds its rated value, the melt inside the fuse 6 of the corresponding electrical branch will blow quickly, thereby cutting off the corresponding electrical branch and preventing electrical faults caused by overcurrent. The fuse 6 cuts off the corresponding electrical branch in time when overcurrent occurs, which can effectively prevent continuous heat accumulation and reduce the risk of electrical fire.

[0052] In some embodiments, the battery system 10 further includes a manual maintenance switch 7, and at least one of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53 is provided with the manual maintenance switch 7. In this way, during operations such as maintenance, inspection or component replacement of the battery system 10, the manual maintenance switch 7 can quickly cut off the circuit of at least one of the first electrical branch 51, the second electrical branch 52 and the third electrical branch 53, so that the corresponding electrical branch is in a power-off state, which greatly reduces the risk of electric shock for operators and ensures personal safety. The manual maintenance switch 7 can cut off the corresponding circuit in time, avoiding electrical short circuit and arc phenomena caused by misoperation or equipment failure during the maintenance process.

[0053] Reference Figure 5In some embodiments, each battery pack 1 includes a housing body 14, each housing body 14 having an opening 141. The bottom of one housing body 14 of two adjacent battery packs 1 is adapted to cover the opening 141 of the other housing body 14. The battery system 10 also includes a cover 15, which is used to cover the opening 141 of the housing body 14 at the end. This avoids the need for a cover 15 to cover each opening 141, making the stacked battery packs 1 more compact, reducing the dimensions of the stacking direction, and allowing more battery packs 1 to be stacked in a limited space, thus increasing energy density. The design of the bottom of one housing body 14 covering the opening 141 of another housing body 14, and the cover 15 covering the opening 141 of the end housing body 14, effectively prevents external impurities such as dust and moisture from entering the battery pack 1, extending battery life.

[0054] It should be noted that a seal 9 is provided between the bottom of one of the two adjacent boxes and the periphery of the opening 141 of the other box. Similarly, a seal 9 is also provided between the periphery of the opening 141 of the end box body 14 and the cover 15. This can improve the sealing of the stacked battery packs 1.

[0055] Specifically, the type of seal 9 can be selected as needed. For example, in some embodiments, the seal 9 includes at least one of silicone and foam. Of course, in other embodiments, the type of seal 9 can be limited as needed; specifically, this application does not limit it in this regard.

[0056] In some embodiments, two adjacent box bodies 14 are fixedly connected by fasteners 101. This connection method ensures a stable connection between multiple stacked box bodies 14.

[0057] It should be noted that fasteners can be selected as needed; for example, fasteners may include bolts, screws, or pins. Specifically, this application does not limit the choice of fasteners.

[0058] Reference Figure 5 In some embodiments, the main body 14 includes a bottom plate 142 and multiple side plates 143. The side plates 143 are connected to the bottom plate 142 and form an opening 141. Adjacent side plates 143 are welded together along the circumference of the main body 14. Welding provides a reliable connection force, ensuring a tight bond between adjacent side plates 143. This effectively withstands stresses from external pressure, impacts, and the weight of the internal battery modules, enhancing the structural strength and stability of the main body 14 and ensuring the battery pack 1 maintains its shape and functional integrity under various usage environments. The welded connection has high strength and rigidity, reducing deformation of the main body 14 during use due to stress.

[0059] Reference Figure 2 In some embodiments, each side plate 143 has a notch 1431 on the side opposite to the base plate 142. The notches 1431 of two adjacent side plates 143 are connected to define a welding groove 8, which is suitable for accommodating welding slag. Thus, the welding groove 8 provides a relatively centralized and regular space for welding operations, allowing welders to more accurately align the welding torch or electrode with the welding groove 8, reducing welding defects caused by inaccurate welding positions and improving welding precision and quality. The presence of the welding groove 8 guides and constrains the formation of the weld. During welding, the molten metal flows along and fills the welding groove 8, making the weld more uniform and full, reducing the possibility of defects such as porosity, slag inclusions, and incomplete penetration, and improving the strength and sealing of the weld. The welding slag produced during the welding process naturally falls into the welding tank 8, preventing it from splashing randomly into the interior or exterior of the main body 14. This not only reduces the potential damage to components such as the battery module inside the main body 14, but also ensures the cleanliness of the main body 14's appearance and improves its overall quality. Because the welding slag is contained within the welding tank 8, it does not cause additional stress concentration or interference to the weld and the structure of the main body 14. Simultaneously, the regular weld and good welding quality help improve the structural strength of the main body 14, enabling it to better withstand external pressure and impact, protecting the safety of the internal battery module. Since the welding slag is concentrated in the welding tank 8, subsequent cleaning is relatively simple. Only the welding slag within the welding tank 8 needs to be cleaned; large-scale cleaning of the entire main body 14 is unnecessary, saving cleaning time and labor costs.

[0060] In some embodiments, each battery pack 1 has an electrical compartment 16 and a battery compartment 17, spaced apart from the front to the rear of the vehicle. Dividing the battery pack 1 into electrical compartments 16 and 17, and spacing them apart, achieves clear functional zoning. Electrical compartment 16 is primarily used to house electrical components such as the battery management system (BMS), relays, fuses 6, and manual maintenance switches 7, while battery compartment 17 is specifically used to store battery cells. This zoning design makes the layout of the battery system 10 clearer, facilitating component placement and wiring connections during design and manufacturing. The spacing between electrical compartments 16 and 17 can reduce the risk of fault propagation to some extent. When an electrical component in electrical compartment 16 fails (such as a short circuit or overheating), the heat and arc generated by the fault have a relatively small impact on the battery cells in battery compartment 17 due to the distance from battery compartment 17, reducing the possibility of serious consequences such as battery thermal runaway caused by electrical faults. In the vehicle, the electrical compartment 16 and battery compartment 17 are spaced apart from each other from front to rear. This allows the electrical compartment 16 to be positioned further forward, closer to the driver's cabin, significantly shortening the length of the wiring harness between the electrical compartment 16 and the electrical components in the driver's cabin. Shorter wiring harnesses not only reduce material costs but also decrease the difficulty and space required for wiring harness placement within the vehicle. Since signals attenuate with increasing distance during transmission, shorter connection distances effectively reduce the degree of signal attenuation.

[0061] It should be noted that the electrical connections of the multiple battery packs 1 are all directly connected to the high-voltage circuit of the high-voltage box 2 through the electrical compartment 16.

[0062] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery system, characterized in that, include: Multiple battery packs; A high-voltage box includes a box body and a high-voltage circuit, wherein the high-voltage circuit is installed in the box body and is electrically connected to a plurality of battery packs; A charging dock is installed in the housing and electrically connected to the high-voltage circuit. The charging dock is used to electrically connect to the charging gun.

2. The battery system according to claim 1, characterized in that, Multiple battery packs are stacked along a first direction; Along the first direction, the high-voltage box is located on one side of the stacked battery packs and is connected to the adjacent battery pack.

3. The battery system according to claim 2, characterized in that, The first direction is set parallel to the direction of gravity; The high-voltage box is located at the bottom of the stacked battery packs.

4. The battery system according to claim 2, characterized in that, The battery system also includes a mounting bracket, through which the high-voltage box is connected to the adjacent battery pack.

5. The battery system according to claim 4, characterized in that, The mounting bracket includes: Two mounting plates are arranged opposite each other and spaced apart along the first direction. One of the two mounting plates is connected to the adjacent battery pack, and the other of the two mounting plates is connected to the high-voltage box. Multiple connecting arms are located between the two mounting plates, and the multiple connecting arms are spaced apart circumferentially along the battery pack. The two ends of each connecting arm are respectively connected to the two mounting plates.

6. The battery system according to claim 2, characterized in that, The plurality of battery packs include a first battery pack and a second battery pack at both ends, and a plurality of third battery packs between the first battery pack and the second battery pack. The plurality of third battery packs include a first type of battery pack, a second type of battery pack, and a third type of battery pack. The first type of battery pack is connected in series with the first battery pack to form a first electrical branch, and the second type of battery pack is connected in series to form a second electrical branch. Alternatively, at least one of the first type of battery pack and the third type of battery pack is connected in series with the second type of battery pack to form a second electrical branch, and the third type of battery pack is connected in series with the second battery pack to form a third electrical branch. The first electrical branch, the second electrical branch, and the third electrical branch are all electrically connected to the high-voltage circuit.

7. The battery system according to claim 6, characterized in that, It also includes a fuse, wherein at least one of the first electrical branch, the second electrical branch, and the third electrical branch is provided with the fuse; and / or, The battery system also includes a manual maintenance switch, and at least one of the first electrical branch, the second electrical branch, and the third electrical branch is equipped with the manual maintenance switch.

8. The battery system according to any one of claims 1 to 7, characterized in that, Each of the battery packs includes a housing body having an opening, and the bottom of the housing body of one of two adjacent battery packs is adapted to cover the opening of the housing body of the other housing body; The battery system also includes a cover for concealing an opening in the end of the main body of the casing.

9. An electrical appliance, characterized in that, Includes the battery system as described in any one of claims 1 to 8.

10. The electrical equipment according to claim 9, characterized in that, The electrical equipment also includes vehicles.

11. The electrical equipment according to claim 10, characterized in that, Each of the battery packs has an electrical compartment and a battery compartment, which are arranged from the front to the rear of the vehicle, with the electrical compartment and the battery compartment spaced apart.

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