Battery pack and powered device

Abstract

The present disclosure provides a battery pack. The battery pack comprises a plurality of battery groups and a box. Each battery group comprises a plurality of batteries. The box comprises a plurality of containers stacked and fixed together along a height direction. Each container comprises a bottom wall and a side wall connected together, the bottom wall is located at the bottom of the side wall and enclosed with the side wall to form a containing space. The plurality of battery groups are arranged in the containing spaces of the plurality of containers respectively. The side wall is provided with an inspection window, and a window plate capable of being operatively opened is installed on the inspection window. According to the above structure, by providing a plurality of battery groups, the battery pack can have higher voltage and larger capacity, effectively improving the stability and service life of the whole battery pack and other performances. Secondly, the inspection window on the side wall can effectively improve the portability of the operation, and the operator can directly overhaul the internal components through the inspection window. In addition, the window plate on the inspection window can effectively prevent dust, moisture and other pollutants from entering the interior.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and more specifically to a battery pack and an electrical device having the battery pack. Background Technology

[0002] Battery packs are crucial energy storage components used to store or output electrical energy. To meet the high voltage and large capacity requirements of electrical equipment, multiple battery packs are typically stacked and integrated in series or parallel. However, due to their multi-layered, sealed structure, when an internal battery or module malfunctions and needs repair or replacement, the upper casing and surrounding connecting components must be completely disassembled. This is not only time-consuming and labor-intensive, but repeated disassembly and reassembly can also degrade the casing's sealing performance. Thus, this not only presents problems of operational complexity and inefficiency but also impacts the performance of the battery pack. Utility Model Content

[0003] In view of this, the present disclosure provides a battery pack to at least solve or improve the problem of inconvenient maintenance and repair in conventional battery packs.

[0004] The battery pack comprises multiple battery packs and a housing. Each battery pack includes multiple batteries. The housing includes multiple containers, which are stacked and secured together along their height. Each container includes a bottom wall and side walls connected together, with the bottom wall located at the bottom of the side wall and enclosing a receiving space. The multiple battery packs are arranged within the receiving spaces of the multiple containers. Access windows are provided on the side walls, and the access windows are fitted with operably openable panels.

[0005] In this disclosure, by incorporating multiple battery packs, the battery pack can achieve higher voltage and larger capacity, as well as longer-lasting power supply capabilities, further improving the overall stability and lifespan of the battery pack to meet higher energy demands. Secondly, the maintenance window on the side wall effectively enhances operational portability. Operators can directly inspect, replace, or perform routine checks on internal components such as connectors through the maintenance window without needing to disassemble the entire enclosure, further saving time and manpower. Furthermore, the operably openable window panel on the maintenance window effectively prevents dust, moisture, and other contaminants from entering the enclosure, avoiding contamination of internal electrical components and preventing short circuits.

[0006] This disclosure also provides an electrical device that includes the battery pack described above. Attached Figure Description

[0007] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present disclosure.

[0011] Figure 2 for Figure 1 A schematic diagram of the battery pack container and battery assembly.

[0012] Figure 3 for Figure 2 A schematic diagram of the structure of one side wall of the container.

[0013] Figure 4 This is a schematic diagram of at least a portion of the structure of a battery pack according to another embodiment of the present disclosure.

[0014] Figure 5 This is a schematic diagram of the structure of a battery pack according to another embodiment of the present disclosure.

[0015] Figure 6 This is a schematic diagram of at least a portion of the structure of a battery pack according to another embodiment of the present disclosure.

[0016] Figure 7 This is a schematic diagram of at least a portion of the structure of a battery pack according to another embodiment of the present disclosure.

[0017] Figure 8 This is a schematic diagram of the structure of an electrical device according to an embodiment of the present disclosure.

[0018] Figure Labels Battery pack - 100; Box body - 20; Top cover - 21; Container - 22; Side wall - 221; Outer plate - 222; Inner plate - 223; Connecting part - 224; Inspection window - 30, 30a, 30b; Window panel - 301, 301a; Protection plate - 302, 501; Sealing gasket - 303; Maintenance switch - 40; Opening - 50; Fastener 60; Sub-control device - 70; Electrical equipment - 200. Detailed Implementation

[0019] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0020] <Example Battery Pack> refer to Figure 1 According to one embodiment of this disclosure, a battery pack 100 may include a battery group 10 composed of multiple batteries connected in series and parallel, and integrate a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. The battery pack 100 may also include a housing 20, in which the aforementioned components are housed and sealed by a top cover 21, forming a complete functional unit capable of directly outputting electrical energy. The sealed structure formed by the housing 20 and the top cover 21 effectively prevents external collisions, compression, and vibrations from affecting the battery group, battery management system (BMS), thermal management system, and other components inside the housing. Furthermore, the sealed structure also prevents external moisture or dust and other contaminants from entering the housing. The battery pack 100 can serve as a rechargeable battery and a power source for new energy vehicles, primarily used for storing and providing electrical energy.

[0021] The housing 20 may include multiple containers 22, which are stacked and secured together along their height. Figure 2 Each container 22 may include a bottom wall and side walls connected together, with the bottom wall located at the bottom of the side walls and enclosing a receiving space. An inspection window 30 may be provided on the side wall of the container 22, and the inspection window 30 is equipped with a window panel 301 that can be operably opened. The battery pack 100 may also include multiple battery groups 10, which can be electrically connected in series or parallel. The multiple battery groups 10 are respectively arranged in the receiving spaces of the multiple containers 22. For ease of description, in the accompanying drawings of this disclosure, Y indicates the height direction and Z indicates the length direction.

[0022] Each battery pack 10 can be formed by connecting multiple batteries with similar capacity and internal resistance. For example, multiple batteries can be connected in series to form a battery pack, or multiple batteries can be connected in parallel to form a battery pack, or a portion of multiple batteries can be connected in series and another portion can be connected in parallel to form a battery pack.

[0023] The battery pack 100 may also include conductive elements. The conductive elements can electrically connect the terminals of at least two batteries, i.e., the output terminals of the battery current, to enable multiple batteries to be connected in series or in parallel.

[0024] A battery is the basic energy storage unit in the battery pack 100, used to store and release electrical energy, and capable of converting chemical energy into electrical energy (discharging process) or storing electrical energy as chemical energy (charging process) through internal chemical reactions. In the battery pack 100, multiple batteries can be electrically connected in series or parallel to meet different voltage, capacity, and power requirements. In some embodiments, the battery is a prismatic battery. In other embodiments, the battery is a cylindrical battery. In other embodiments, the battery is a pouch battery. In other embodiments, the battery may also be other types of batteries. This disclosure does not limit the type of battery.

[0025] According to the above structure, by incorporating multiple battery packs 10, the battery pack 100 can achieve higher voltage and larger capacity, as well as longer-lasting power supply capability, further improving the stability and lifespan of the entire battery pack 100 to meet higher energy demands. Secondly, the maintenance window 30 on the side wall 221 effectively enhances operational portability. Operators can directly install, repair, replace, or perform routine checks on internal components such as connectors through the maintenance window 30 without needing to disassemble the entire enclosure 20, thus saving time and manpower. Furthermore, the operably openable window panel 301 installed on the maintenance window 30 effectively prevents dust, moisture, and other contaminants from entering the enclosure, avoiding contamination of internal electrical components and causing short circuits. With the above structure, when maintenance and inspection are required, operators can directly inspect, install, or maintain the internal components of the battery pack 100 by simply opening the window panel 301, greatly simplifying the process. After maintenance and inspection are completed, the window panel 301 is closed, and the battery pack 100 remains sealed.

[0026] refer to Figure 3 An exhaust valve 32 is provided on the window panel 301. The exhaust valve 32 opens when the air pressure in the corresponding container 22 is greater than the target air pressure.

[0027] When a battery experiences thermal runaway due to overheating or overcharging, the internal chemical reaction rapidly generates a large amount of gas, causing the gas pressure inside container 22 to exceed the target pressure, resulting in a pressure difference between the inside and outside of the container. Temperature changes or altitude fluctuations can also cause a pressure difference between the inside and outside of the container. By providing an exhaust valve 32, when the gas pressure inside the container exceeds the target pressure, the gas inside container 22 can be discharged to the outside of the container by opening the corresponding exhaust valve 32, thereby balancing the internal and external gas pressures and preventing excessive internal pressure from causing the container to expand, rupture, or even explode. In addition, placing the exhaust valve 32 on the window panel 301 avoids the need for separate openings for exhaust valves 32 in other locations on the casing, simplifying the structural design of the casing 20.

[0028] This disclosure does not specifically limit the value of the target air pressure, as long as the valve remains closed when the air pressure in container 22 is less than or equal to the target air pressure, and opens when the air pressure in the container is greater than the target air pressure. For example, the target air pressure can range from 1 kPa to 15 kPa. Preferably, the target air pressure can range from 3 kPa to 13 kPa. More preferably, the target air pressure can range from 5 kPa to 11 kPa. Alternatively, the target air pressure can range from 6 kPa, 7 kPa, 8 kPa, 9 kPa, or 10 kPa.

[0029] refer to Figure 3 A protective plate 302 is also provided on the side wall 221. The protective plate 302 covers the outside of the maintenance window 30 and covers the maintenance window 30. The protective plate 302 is provided with an exhaust hole, which is used to discharge the gas discharged through the exhaust valve.

[0030] Based on the above structure, the protective plate 302 can effectively resist external physical impacts or accidental scratches, preventing the window plate 301 from being directly scratched and damaged due to external collisions, compression, and vibrations. It further prevents dust, moisture, and other contaminants from entering the enclosure through the inspection window 30. In addition, by providing vents on the protective plate 302, an airflow channel can be provided for gas. When the gas pressure inside the container exceeds the target pressure, the gas discharged from inside the container through the vent valve 32 can be discharged to the outside of the enclosure through the vent.

[0031] In another embodiment, reference Figure 4 The sidewall 221 includes an outer layer plate 222 and an inner layer plate 223 arranged at intervals along its thickness direction, and an inspection window 301 is provided on the inner layer plate 223. For ease of description, Z is used to indicate the thickness direction in the accompanying drawings of this disclosure.

[0032] Based on the above structure, the double-layer structure of the sidewall 221 can enhance the structural strength of the battery pack 100, giving the battery pack 100 higher reliability and safety. The outer layer 222 can also protect the maintenance window 30 and window panel 301 on the inner layer 223, preventing the maintenance window 30 and window panel 301 from being affected by external physical impacts or accidental scratches, and effectively blocking dust, moisture and other pollutants from entering the interior of the enclosure through the maintenance window.

[0033] refer to Figure 4 The battery pack 100 may also include a maintenance switch 40. The maintenance switch 40 is located on the inner layer plate 223 and is close to the inspection window 30.

[0034] The maintenance switch 40 is a critical safety device in the battery pack. Its main function is to disconnect the high-voltage electrical connection between the battery pack 100 and external loads when maintenance, repair, or emergencies are required. This maintenance switch 40 can be manually operated to ensure that the battery pack 100 is de-energized during installation, repair, or maintenance, ensuring the safety of operators. The maintenance switch 40 also features a built-in fuse that automatically blows in the event of an external short circuit or severe overcurrent in the battery pack 100, permanently cutting off the fault current and preventing the spread of thermal runaway, thereby protecting the internal batteries and high-voltage wiring components of the battery pack 100. By incorporating a maintenance switch into the battery pack 100, operator safety is ensured, and the overall reliability of the battery pack 100 is improved.

[0035] According to the above structure, the outer layer 222 can protect the maintenance switch 40 located on the inner layer 223, preventing the maintenance switch 40 from being damaged or malfunctioning due to external impacts, compression, vibration, etc. Furthermore, by arranging the maintenance switch 40 close to the inspection window 30, operators can operate the maintenance switch 40 more conveniently and quickly when performing maintenance through the inspection window 30. The arrangement of the maintenance switch 40 close to the inspection window 30 also allows operators to clearly see the maintenance switch 40 before performing maintenance operations, reducing the risk of accidentally touching high-voltage live parts due to forgetting to disconnect the power or searching for the maintenance switch 40.

[0036] Continue to refer to Figure 4 The outer layer plate 222 has an opening 50 corresponding to the inspection window 30. The orthographic projection of the opening 50 on the inner layer plate 223 completely covers the inspection window 30 and the maintenance switch 40.

[0037] According to the above structure, the inspection window 30 and maintenance switch 40 on the inner plate 223 can be fully exposed through the opening 50 on the outer plate 222. This allows the operator to operate directly through the opening 50 on the outer plate 222 without disassembling the outer plate 222. At the same time, it allows the operator to operate without obstacles, improving maintenance efficiency and ease of operation.

[0038] In another embodiment, reference Figure 5 The multiple containers 22 include multiple first containers 22a and multiple second containers 22b. The multiple first containers 22a and multiple second containers 22b are stacked alternately, and a maintenance switch 40 is provided only on the side wall 221 of each first container 22a.

[0039] According to the above configuration, maintenance switches 40 are only provided on the alternately arranged first containers 22a. One maintenance switch 40 can provide service to itself and the adjacent second containers 22b, which reduces the total number of maintenance switches 40, thereby reducing the number of openings in the housing. The above configuration can also reduce production costs, simplify wiring harness layout, and improve the overall reliability of the battery pack.

[0040] In addition, operators do not need to search for and operate the maintenance switch 40 on each container 22. They can simply disconnect the high-voltage power supply to themselves and the adjacent second container 22b by performing a power-off operation on the first container 22a. This improves the efficiency of maintenance work and reduces the risk of misoperation.

[0041] In another embodiment, reference Figure 4 The outer plate 222 is provided with an opening 50 corresponding to the maintenance window 30, and a protective plate 501 for closing the opening 50 is also installed on the outer plate 222.

[0042] Based on the above structure, when maintenance and inspection are required, operators can open the protective plate 501 and operate directly through the opening 50 on the outer plate 222 without disassembling other components. Furthermore, the protective plate 501 on the outer plate 222 effectively resists external physical impacts or accidental scratches, preventing the window plate 301 and / or maintenance switch 40 on the inner plate 223 from being directly scratched or damaged by external collisions, pressure, and vibrations. This further prevents dust, moisture, and other contaminants from entering the enclosure through the maintenance window 30.

[0043] In another embodiment, reference Figure 5 The battery pack 100 also includes fasteners 60. Combined Figure 4 A connecting portion 224 is provided between the outer layer plate 222 and the inner layer plate 223. A fastener 60 passes through the two connecting portions 224 of the two adjacent containers 22 to secure them together. By way of example only, the outer layer plate 222, the inner layer plate 223, and the connecting portion 224 can be independent components, or they can be integrally formed, or partially integrally formed and partially independent components. This disclosure does not impose specific limitations on them. In some embodiments, the fastener 60 is a bolt and a nut. In other embodiments, the fastener is a snap-fit. In other embodiments, the fastener 60 is a screw. In other embodiments, the fastener 60 can also be other types of fasteners, as long as they can secure the two adjacent containers 22 together. This disclosure does not limit their type.

[0044] According to the above structure, by providing a connecting portion 224 between the outer layer plate 222 and the inner layer plate 223, the double-layer plate structure of the outer layer plate 222 and the inner layer plate 223 can be firmly connected together. Furthermore, by using fasteners 60 to fix adjacent containers 22 together with the connecting portion 224 between the outer layer plate 222 and the inner layer plate 223, it is possible to avoid the need for additional special brackets or connectors to connect adjacent containers 22, simplifying the structure, saving installation space, reducing the number of parts and manufacturing costs, and also improving the structural rigidity and stability of the entire battery pack 100.

[0045] In another embodiment, reference Figures 3 to 7 The side wall 221 is provided with two inspection windows 30, which are spaced apart in the width direction of the side wall 221. For ease of description, X is used to indicate the width direction in the accompanying drawings of this disclosure.

[0046] By providing two inspection windows 30 on the side wall 221, operators can observe the interior of the inspection chamber from different positions, avoiding problems such as obstructed vision when operating through a single inspection window 30, making operation more convenient and efficient. Furthermore, the spaced arrangement of the two inspection windows 30 avoids excessive weakening of the structural strength of the side wall 221 and allows for observation of a larger area inside the chamber.

[0047] refer to Figure 4 and Figure 5 The two maintenance windows 30 include a first maintenance window 30a and a second maintenance window 30b, with an exhaust valve 32 provided only on the window panel 301a of the first maintenance window 30a.

[0048] According to the above structure, by providing an exhaust valve 32, it can serve as a pressure relief channel, ensuring that the gas generated during battery thermal runaway can be quickly and directionally discharged through the exhaust valve 32. Furthermore, the battery pack 100 with the above structure reduces the number of exhaust valves 32 while ensuring smooth pressure relief, thereby reducing production costs and assembly complexity.

[0049] Maintenance switch 40 is located only next to the second inspection window 30b.

[0050] By providing a maintenance switch 40 in the second maintenance window 30b, the operator can avoid touching or affecting the exhaust valve 32 on the window panel 301a of the first maintenance window 30a when operating in the second maintenance window 30b. In addition, the high-voltage electrical connection between the battery pack 100 and the external load can be disconnected in case of maintenance, repair or emergency.

[0051] In another embodiment, reference Figure 6Each container 22 is equipped with a sub-control device 70, and the orthographic projection of the sub-control device 70 on the side wall 221 at least partially overlaps with the maintenance window 30.

[0052] The sub-control device 70 is mainly responsible for monitoring and managing components within a specific area of ​​the battery pack 100. It monitors the voltage and temperature of all batteries within its assigned area in real time via a data acquisition circuit, and uploads the data to the main control unit for processing and analysis via communication methods such as the CAN bus. It is a key component for ensuring the safe and stable operation of the battery pack 100.

[0053] Based on the above structure, operators can directly access the sub-control device requiring maintenance through the inspection window 30 without disassembling other components. This simplifies the wiring, inspection, or replacement process of the sub-control device 70, reduces unnecessary disassembly work during maintenance, saves time and labor costs, and reduces the potential risk of damage caused by complex operations.

[0054] In another embodiment, the window panel 301 is transparent or semi-transparent.

[0055] By making the window panel 301 transparent or semi-transparent, operators can directly observe the status of the internal components of the enclosure without any operation. This allows for quick identification of problems such as leakage, loose connections, or smoke caused by thermal runaway. This reduces unnecessary window panel opening operations and better maintains the sealing of the battery pack 100.

[0056] In another embodiment, reference Figure 7 The outer periphery of the inspection window 30 is provided with a plurality of threaded holes spaced apart, and a plurality of bolts pass through the window panel 301 and are screwed into the plurality of threaded holes respectively. In some embodiments, the window panel 301 may also be fixed by a snap-fit. In some other embodiments, the window panel 301 may also be fixed by magnetic attraction. This disclosure does not specifically limit the method thereto.

[0057] Based on the above structure, a reliable connection between the window panel 301 and the side wall 221 is achieved through a mechanical fastening method using threaded holes and bolts. This fastening method has high mechanical strength and vibration resistance, effectively preventing the window panel 301 from loosening or shifting due to external vibrations, impacts, or other reasons. The bolt connection also provides a reliable and repeatedly detachable fixing method for the inspection window 30, ensuring not only connection reliability but also convenient opening and closing during routine maintenance. Furthermore, the multiple threaded holes spaced apart on the outer periphery of the inspection window 30, when engaged with bolts, create a uniformly distributed fastening force around the window 30, ensuring a tight fit between the window panel 30 and the surface of the side wall 221.

[0058] The battery pack 100 may also include a sealing gasket 303. The sealing gasket 303 surrounds the access window 30 and has a plurality of through holes spaced apart. A plurality of bolts pass through the plurality of through holes, so that the window panel 301 presses the sealing gasket 303 against the outer periphery of the access window 30.

[0059] Due to potential errors during manufacturing or assembly, the side wall 221 may have minor unevenness on its surface, resulting in small gaps between the window panel 301 and the outer periphery of the inspection window 30, thus reducing airtightness. By providing a sealing gasket 303 between the window panel 301 and the inspection window 30, and pressing the gasket 303 against the outer periphery of the inspection window 30, the gasket 303 can effectively fill the gaps, improve airtightness, and effectively prevent dust, moisture, and other contaminants from entering the enclosure.

[0060] refer to Figure 1 Multiple sidewalls 221 of multiple containers 22 are located on the same side of the box body 20.

[0061] By arranging the multiple sidewalls 221 of the multiple containers 22 on the same side of the housing 20, and thus the multiple inspection windows 30 of the multiple sidewalls 221 also located on the same side of the housing 20, operators do not need to move the battery pack 100 or go around to different positions on the housing 20 to perform operations. They can perform inspections and maintenance on the multiple containers 22 from one side of the housing 20. The battery pack 100 with the above-described structure not only simplifies the operation process, shortens maintenance time, and reduces workload and intensity, but also reduces the risk of misoperation, facilitating rapid maintenance of the multiple containers 22.

[0062] refer to Figure 6 At least one inspection window 30 is provided on the side wall 221. The sum of the areas of the at least one inspection window is S1, in meters. 2 The area of ​​the sidewall is S², in meters. 2 0.2 ≤ S1 / S2 ≤ 0.3. Preferably, 0.22 ≤ S1 / S2 ≤ 0.29. More preferably, 0.24 ≤ S1 / S2 ≤ 0.26. Alternatively, the ratio S1 / S2 can also be 0.21, 0.23, 0.25, 0.27, or 0.28. For example only, 0.04m 2 ≤S1≤0.06m 2 0.2m 2 ≤S2≤0.4m 2 .

[0063] Within a reasonable range of 0.2 ≤ S1 / S2 ≤ 0.3, the ratio facilitates a series of operations by operators through the inspection window 30, while also ensuring good safety and reliability of the battery pack. If the ratio S1 / S2 is too small, meaning the sum of the areas of at least one inspection window 30, S1, is relatively small, it will make operation inconvenient for operators. Effective observation, installation, or replacement of components will be impossible through the narrow inspection window, increasing work difficulty, reducing work efficiency, and potentially even causing safety issues due to operational difficulties. If the ratio S1 / S2 is too small, meaning the sum of the areas of at least one inspection window 30, S1, is relatively large, it will weaken the structural strength of the side wall 221, making it more susceptible to deformation from external impacts and reducing the reliability of the battery pack 100.

[0064] <Example Electrical Equipment> This disclosure also provides an electrical device 200, which may include the battery pack described above.

[0065] By way of example only, electrical equipment can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, forklifts, construction vehicles, etc.

[0066] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0067] In a non-restrictive example, refer to Figure 8 The electrical equipment 200 can be an electric vehicle 200, and the battery pack 100 can be used as a power source to provide power to the electric vehicle.

[0068] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0069] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0070] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as a first container and a second container), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0071] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0072] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, include: Multiple battery packs, each containing multiple batteries; as well as The housing includes multiple containers stacked and fixed together along the height direction. Each container includes a bottom wall and a side wall connected together. The bottom wall is located at the bottom of the side wall and encloses a receiving space with the side wall. Multiple battery packs are respectively arranged in multiple receiving spaces of the multiple containers. The side wall is provided with an inspection window, and the inspection window is equipped with a window panel that can be operably opened.

2. The battery pack according to claim 1, characterized in that, The window panel is equipped with an exhaust valve, which opens when the air pressure in the corresponding container is greater than the target air pressure.

3. The battery pack according to claim 2, characterized in that, The side wall is also provided with a protective plate, which is placed on the outside of the maintenance window and covers the maintenance window. The protective plate is provided with an exhaust hole, which is used to discharge the gas discharged through the exhaust valve.

4. The battery pack according to claim 1, characterized in that, The sidewall includes an outer layer plate and an inner layer plate arranged at intervals along its thickness direction, and the inspection window is located on the inner layer plate.

5. The battery pack according to claim 4, characterized in that, The battery pack also includes a maintenance switch, which is located on the inner layer plate and close to the inspection window.

6. The battery pack according to claim 5, characterized in that, The outer layer plate has an opening corresponding to the inspection window, and the orthographic projection of the opening on the inner layer plate completely covers the inspection window and the maintenance switch.

7. The battery pack according to claim 5, characterized in that, The plurality of containers includes a plurality of first containers and a plurality of second containers, which are stacked alternately, with the maintenance switch provided only on the side wall of each first container.

8. The battery pack according to claim 4, characterized in that, The outer layer plate has an opening corresponding to the inspection window, and a protective plate for closing the opening is also installed on the outer layer plate.

9. The battery pack according to claim 4, characterized in that, It also includes fasteners, with a connecting portion between the outer layer plate and the inner layer plate, the fasteners passing through the two connecting portions of the two adjacent containers to fix the two containers together.

10. The battery pack according to claim 1, characterized in that, The side wall is provided with two maintenance windows, which are spaced apart in the width direction of the side wall.

11. The battery pack according to claim 10, characterized in that, The two maintenance windows include a first maintenance window and a second maintenance window, with an exhaust valve provided only on the window panel of the first maintenance window.

12. The battery pack according to claim 11, characterized in that, A maintenance switch is located only next to the second inspection window.

13. The battery pack according to claim 1, characterized in that, Each container is equipped with a control device, the orthographic projection of which on the side wall at least partially overlaps with the maintenance window.

14. The battery pack according to claim 1, characterized in that, The window panel is transparent or semi-transparent.

15. The battery pack according to claim 1, characterized in that, The outer periphery of the inspection window is provided with a plurality of threaded holes arranged at intervals, and a plurality of bolts pass through the window panel and are screwed into the plurality of threaded holes respectively.

16. The battery pack according to claim 15, characterized in that, It also includes a sealing gasket surrounding the inspection window. The sealing gasket has a plurality of through holes spaced apart, and the plurality of bolts pass through the plurality of through holes respectively, so that the window panel presses the sealing gasket against the outer periphery of the inspection window.

17. The battery pack according to claim 1, characterized in that, The multiple sidewalls of the multiple containers are located on the same side of the box body.

18. The battery pack according to claim 17, characterized in that, At least one inspection window is provided on the side wall, and the sum of the areas of the at least one inspection window is S1, in meters. 2 The area of ​​the sidewall is S², in meters. 2 , 0.2≤S1 / S2≤0.

3.

19. The battery pack according to claim 18, characterized in that, 0.04m 2 ≤S1≤0.06m 2 0.2m 2 ≤S2≤0.4m 2 。 20. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 19.

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