Portable energy storage device and energy storage system

Abstract

Disclosed in the present application are a portable energy storage device and an energy storage system. The portable energy storage device comprises a housing assembly, a battery cell group, and a circuit board assembly, wherein the housing assembly has a first direction and a second direction perpendicular to each other; the cell group is arranged inside the housing assembly, and comprises a plurality of battery cells arranged in the second direction, each battery cell being of a cuboid structure, each battery cell having two small faces opposite each other in the first direction and also having two large faces opposite each other in the second direction, and the area of the large faces being greater than the area of the small faces; and the circuit board assembly is arranged inside the housing assembly, and is located on the side where the small faces of the battery cells are located, and the circuit board assembly is electrically connected to the battery cells of the battery cell group.

Description

Portable energy storage devices and energy storage systems Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a portable energy storage device and energy storage system. Background Technology

[0002] To meet the charging and discharging requirements of portable energy storage devices, in addition to a battery, the device also contains a circuit board assembly electrically connected to the battery. An inverter on the circuit board assembly allows the internal current of the portable energy storage device to be converted between AC and DC. However, because the battery expands during charging and discharging, it can compress the circuit board assembly, causing damage and affecting the usability of the portable energy storage device.

[0003] Summary of the Invention

[0004] This application discloses a portable energy storage device and energy storage system that can reduce the degree of compression on the circuit board assembly when each battery cell expands, so as to avoid damage to the circuit board assembly.

[0005] To achieve the above objectives, the first aspect of this application discloses a portable energy storage device, the portable energy storage device comprising:

[0006] A housing assembly having a first and a second orientation that are vertically disposed;

[0007] A battery cell assembly, disposed inside the housing assembly, comprising a plurality of battery cells arranged along a second direction, each battery cell having a cuboid structure, and each battery cell having two small faces opposite each other along the first direction, and also having two large faces opposite each other along the second direction, the area of ​​the large faces being larger than the area of ​​the small faces; and

[0008] A circuit board assembly is disposed inside the housing assembly and located on the side where the small facet of each of the battery cells is located. The circuit board assembly is electrically connected to the battery cells of the battery cell group.

[0009] In the portable energy storage device provided in this application, by placing the circuit board assembly on the side where the small face of each battery cell is located, since the expansion deformation of the battery cell is mainly on the large face of the battery cell, the degree of compression of the circuit board assembly by each battery cell during expansion can be reduced, so as to avoid damage to the circuit board assembly and thus help to improve the service life of the circuit board assembly.

[0010] A second aspect of this application discloses an energy storage system having a portable energy storage device as described in the first aspect above. The energy storage system having the portable energy storage device described in the first aspect can also reduce the pressure exerted on the circuit board assembly by the battery pack during expansion, thereby avoiding damage to the circuit board assembly.

[0011] Compared with the prior art, this application has the following beneficial effects:

[0012] The portable energy storage device and energy storage system provided in this application embodiment, by placing the circuit board assembly on the side where the small face of each battery cell is located, can reduce the degree of compression on the circuit board assembly when the battery cell expands, so as to avoid damage to the circuit board assembly and thus improve the service life of the circuit board assembly, since the expansion deformation of the battery cell is mainly on the large face of the battery cell. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a schematic diagram of the structure of the portable energy storage device disclosed in the embodiments of this application;

[0015] Figure 2 is a structural schematic diagram of the portable energy storage device disclosed in the embodiments of this application from another perspective;

[0016] Figure 3 is an exploded structural diagram of the portable energy storage device disclosed in the embodiments of this application;

[0017] Figure 4 is a schematic diagram of the structure of the bottom shell, battery cell assembly, circuit board assembly, fixing assembly, and second sub-beam wire disclosed in the embodiments of this application;

[0018] Figure 5 is a schematic diagram of the battery cell assembly disclosed in an embodiment of this application;

[0019] Figure 6 is a schematic diagram of the structure of the top shell, power socket, magnetic ring, display component, and first sub-beam wire disclosed in the embodiments of this application;

[0020] Figure 7 is a schematic diagram of the top shell structure disclosed in an embodiment of this application;

[0021] Figure 8 is a schematic diagram of the structure of the bottom shell, the first dustproof net, and the second dustproof net disclosed in the embodiment of this application;

[0022] Figure 9 is a schematic diagram of the structure of the battery cell assembly, circuit board assembly, and fixing assembly disclosed in an embodiment of this application;

[0023] Figure 10 is an exploded structural diagram of the circuit board assembly disclosed in an embodiment of this application;

[0024] Figure 11 is a schematic diagram of the circuit board assembly disclosed in an embodiment of this application;

[0025] Figure 12 is a schematic diagram of the structure of the battery cell assembly and fixing assembly disclosed in the embodiments of this application;

[0026] Figure 13 is an exploded structural diagram of the battery cell assembly and fixing components disclosed in the embodiments of this application;

[0027] Figure 14 is a schematic diagram of the structure of the first and second tablets disclosed in the embodiments of this application.

[0028] Key reference numerals: 100 - Portable energy storage device; 10 - Housing assembly; 101 - Bottom shell; 101a - Third side; 101b - Fourth side; 1011 - Second connecting post; 1012 - Through hole; 1013 - Third vent; 1014 - Fourth vent; 102 - Top shell; 1021 - Power socket; 1022 - Handle; 1023 - First connecting post; 1024 - Threaded hole; 11 - Battery cell assembly; 11a - Battery cell; 1 11-Small face; 112-Large face; 113-Terminal post; 113a-First terminal post; 113b-Second terminal post; 12-Circuit board assembly; 121-Circuit board; 122-Inverter; 123-Protective shell; 123a-First side; 123b-Second side; 123c-Two opposite sides; 1231a-First clearance notch; 1231b-Second clearance notch; 1232-Wire passage hole; 1233-Protrusion; 1234-Fixing hole; 1 235 - First vent; 1236 - Second vent; 1237 - Second connecting protrusion; 1238 - Through hole; 124a - First power terminal; 124b - Second power terminal; 125 - Fan; 13a - Communication module; 13b - Magnetic ring; 14 - Connecting cable; 141 - First sub-cable; 1411 - First connector; 142 - Second sub-cable; 1421 - Second connector; 15 - Display assembly; 16a - Connecting plate; 1 6b-First tab; 16b1-First recess; 16b2-First wire connection hole; 16c-Second tab; 16c1-Second recess; 16c2-Second wire connection hole; 16d-Fastener; 17a-First dustproof net; 17b-Second dustproof net; 18-Fixing assembly; 181-Connector; 182-Fixing component; 1821-First connecting protrusion; 1822-Threaded connection hole; 19a-Elastic component; 19b-Locking component; f1-First direction; f2-Second direction; f3-Height direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first sub-beam may be referred to as a second sub-beam, and similarly, a second sub-beam may be referred to as a first sub-beam. Both the first and second sub-beams are sub-beams, but they are not the same sub-beam.

[0032] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0033] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0034] In order to meet the charging and discharging requirements of portable energy storage devices, in addition to multiple series-connected battery cells, portable energy storage devices also have circuit board assemblies that are electrically connected to the battery cells. This allows the inverter on the circuit board assembly to convert the internal current of the portable energy storage device between AC and DC.

[0035] Typically, adjacent cells in a multi-cell battery system are connected in series via a connecting plate. The cell closest to the circuit board assembly has a first terminal not electrically connected to any adjacent cell; this first terminal is electrically connected to the circuit board assembly via a first connecting plate. The cell furthest from the circuit board assembly has a second terminal not electrically connected to any adjacent cell; this second terminal is electrically connected to the circuit board assembly via a second connecting plate. However, since the terminals of the multiple cells are usually arranged in two straight lines extending along the cell layout direction, the second connecting plate must pass over the first connecting plate or the connecting plate to connect to the circuit board assembly. This results in at least part of the second connecting plate being located above the first connecting plate or the connecting plate, leading to a relatively high overall height of the portable energy storage device, which is detrimental to its miniaturization design.

[0036] In view of this, embodiments of this application provide a portable energy storage device that can reduce the degree of compression on the circuit board assembly by each battery cell during expansion while achieving a miniaturized design.

[0037] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0038] Referring to Figures 1 and 2, the portable energy storage device provided in this embodiment includes a housing assembly 10. The housing assembly 10 has a first direction f1 and a second direction f2 that are perpendicular to each other, and also has a height direction f3 that is perpendicular to both the first direction f1 and the second direction f2. For example, the housing assembly 10 may be a cuboid structure, in which case the first direction f1 is the length direction of the housing assembly 10, and the second direction f2 is the width direction of the housing assembly 10.

[0039] Referring to Figures 3 to 5, the portable energy storage device 100 of this application further includes a battery cell assembly 11, which is disposed inside the housing assembly 10. The battery cell assembly 11 may include one or more rectangular battery cells 11a. When there are multiple battery cells 11a, there may be two, three, four, five, six, or more cells 11a, and the multiple cells 11a are arranged along the second direction f2. Each battery cell 11a has two small faces 111 facing each other along the first direction f1, and also has two large faces 112 facing each other along the second direction f2, the area of ​​the large faces 112 being larger than the area of ​​the small faces 111.

[0040] Furthermore, each cell 11a has two pole posts 113 arranged at intervals along the first direction f1 at its top in the height direction f3. The pole posts 113 of two adjacent cells 11a are connected in series through connecting plates 16a. Among the multiple pole posts 113, there are first pole posts 113a and second pole posts 113b that are not electrically connected to other pole posts 113. The first pole posts 113a and the second pole posts 113b are both located on the same side of the housing assembly 10 in the first direction f1.

[0041] When the battery cell assembly 11 includes a single rectangular parallelepiped cell 11a, the battery cell assembly 11 has two terminals 113 disposed on the cell 11a. When the battery cell assembly 11 includes multiple rectangular parallelepiped cells 11a, the multiple cells 11a are arranged along the second direction f2, and the large surfaces 112 of the multiple cells 11a are stacked sequentially along the second direction f2. The battery cell assembly 11 has two terminals 113 disposed on each cell 11a.

[0042] The following describes the technical solution of this application in further detail, taking the battery cell assembly 11, which includes two battery cells 11a connected in series as an example. Each battery cell 11a is provided with two terminals 113, wherein one terminal 113 of one battery cell 11a is electrically connected to another terminal 113 of the other battery cell 11a, so that the two battery cells are connected in series. The other terminal 113 of one battery cell 11a constitutes the first terminal 113a, and the other terminal 113 of the other battery cell 11a constitutes the second terminal 113b.

[0043] The portable energy storage device 100 of this application also includes a circuit board assembly 12, which is disposed inside the housing assembly 10 and located on the side where the small facet 111 of each battery cell 11a is located. The circuit board assembly 12 is electrically connected to the battery cells 11a of the battery cell group 11. Specifically, the first terminal 113a and the second terminal 113b are mechanically and electrically connected to the circuit board assembly 12, respectively. By placing the circuit board assembly 12 on the small facet of each battery cell 11a, since the expansion deformation of the battery cell 11a is mainly on the large facet 112 of the battery cell 11a, the degree of compression on the circuit board assembly 12 during expansion can be reduced, thereby avoiding damage to the circuit board assembly 12 and thus improving the service life of the circuit board assembly 12.

[0044] The portable energy storage device 100 of this application further includes a power strip electrically connected to an electrode post, the power strip including a first power strip 16b and a second power strip 16c. The first power strip 16b is electrically connected to a first electrode post 113a and extends along a first direction f1 to be mechanically and electrically connected to the circuit board assembly 12. The second power strip 16c is electrically connected to a second electrode post 113b and extends along a first direction f3 to be mechanically and electrically connected to the circuit board assembly 12.

[0045] In this application, multiple battery cells 11 are arranged along the second direction f2, and each battery cell 11a has two small faces 111 opposite each other along the first direction f1, and also has two large faces 112 opposite each other along the second direction f2. The circuit board assembly 12 is disposed on the side where the small faces 111 of each battery cell 11a are located. At the same time, each battery cell 11a is provided with two terminals 113 arranged at intervals along the first direction f1. After connecting the terminals 113 of two adjacent battery cells 11a in series, the first terminal 113a and the second terminal 113b that are not electrically connected to other terminals 113 can be located on the same side of the housing assembly 10. That is, the first terminal 113a and the second terminal 113b can be located near each battery cell 11a. On the same side of the circuit board assembly 12, the first electrode 16b connected to the first pole post 113a and the circuit board assembly 12, the second electrode 16c connected to the second pole post 113b and the circuit board assembly 12, and the connecting electrode 16a connected to two adjacent cells 11a are staggered, so as to avoid the second electrode 16c and the first electrode 16b or the connecting electrode 16a from overlapping, thereby preventing the second electrode 16c from being at least partially located above the first electrode 16b or the connecting electrode 16a, reducing the overall thickness of the portable energy storage device 100 to achieve a miniaturized design, and also making the arrangement of the connecting electrode 16a, the first electrode 16b and the second electrode 16c more regular and orderly.

[0046] In some optional embodiments, as shown in Figures 3 to 6, the portable energy storage device 100 may further include a communication module 13a. The communication module 13a is detachably disposed at the top of the housing assembly 10 in the height direction f3 and located inside the housing assembly 10. The communication module 13a is electrically connected to the circuit board assembly 12 and is used to establish a communication connection with a smart terminal. The smart terminal may be, but is not limited to, a mobile phone, tablet, laptop, or desktop computer.

[0047] In this application, a communication module 13a electrically connected to the circuit board assembly 12 is added inside the outer casing assembly 10. This communication module 13a can establish a communication connection with smart terminals such as mobile phones, tablets, laptops, and desktop computers, thereby transmitting data such as parameters of the battery cell assembly 11 to the smart terminal. This allows users to remotely view the data of the battery cell assembly 11 and remotely monitor the battery cell assembly 11 through the smart terminal, avoiding the cumbersome process caused by the need for manual on-site visits to obtain the data of the battery cell assembly 11. At the same time, the portable energy storage device 100 can also be controlled through the smart terminal, such as starting and stopping it, realizing human-machine separation and greatly facilitating the control of the portable energy storage device 100.

[0048] Furthermore, this application also arranges the circuit board assembly 12 on the side where the small surface 111 or the large surface 112 of the battery cell assembly 11 is located, and arranges the communication module 13a on the top of the housing assembly 10, so that the communication module 13a is separated from the circuit board assembly 12 and can be kept away from the circuit board assembly 12. This not only allows the communication module 13a to be selected according to the user's actual needs, but also reduces the interference of the circuit board assembly 12 on the signal of the communication module 13a and improves the communication performance of the communication module 13a.

[0049] The phrase "selecting and configuring communication module 13a according to the user's actual needs" can be understood as follows: during assembly, different types of communication modules 13a can be configured and installed in the portable energy storage device 100 according to the user's actual needs. It can even be determined whether to configure the portable energy storage device 100 with communication module 13a according to the user's usage requirements. That is, if the user requires the configuration of communication module 13a, then communication module 13a can be installed on the outer shell assembly 10. If the user requires that communication module 13a is not configured, then communication module 13a can not be installed on the outer shell assembly 10.

[0050] In this application, the communication module 13a may be one or any combination of an antenna (e.g., a 4G antenna, a 5G antenna, etc.), a Bluetooth module, and a Wi-Fi module.

[0051] For example, when the communication module 13a is an antenna, the circuit board assembly 12 of the portable energy storage device 100 can establish a wireless connection with the motherboard of the smart terminal through the communication module 13a to transmit parameters such as voltage, temperature, charging status and discharging status of the battery pack 11 to the motherboard of the smart terminal, and display them on the screen of the smart terminal for easy monitoring of the portable energy storage device 100.

[0052] For example, when the communication module 13a is a Bluetooth module, Bluetooth technology can also be used to establish a wireless connection between the circuit board assembly 12 of the portable energy storage device 100 and the motherboard of the smart terminal, so as to transmit parameters such as voltage, temperature, charging status and discharging status of the battery pack 11 to the motherboard of the smart terminal, and display them on the display screen of the smart terminal for easy monitoring of the portable energy storage device 100.

[0053] For example, when the communication module 13a is a Wi-Fi module, Wi-Fi technology can also be used to establish a wireless connection between the circuit board assembly 12 of the portable energy storage device 100 and the motherboard of the smart terminal, so as to transmit parameters such as voltage, temperature, charging status and discharging status of the battery pack 11 to the motherboard of the smart terminal, and display them on the display screen of the smart terminal for monitoring of the portable energy storage device 100.

[0054] In some optional embodiments, the housing assembly 10 has a power socket 1021 at its top along its height direction f3. The power socket 1021 is electrically connected to the circuit board assembly 12, and the socket of the power socket 1021 is used for inserting an external power plug so that the power plug can be electrically connected to the battery cell 11a of the battery cell assembly 11 through the power socket 1021, the circuit board assembly 12, and the battery cell assembly 11. Thus, an external power source can be connected through the power plug to charge the battery cell assembly 11, or a device to be charged can be connected through the power plug to charge the device to be charged.

[0055] Optionally, as shown in Figures 1 and 2, there can be multiple power sockets 1021, such as two, three, four, five, six, or more. Some of these power sockets 1021 can be used to charge the portable energy storage device 100, while others can be used to discharge the portable energy storage device 100. For example, the power socket 1021 may include four sub-power sockets 1021, where two sub-power sockets 1021 can be used to charge the portable energy storage device 100; the remaining two sub-power sockets 1021 are used to charge the portable energy storage device 100. One of the remaining two sub-power sockets 1021 is an AC charging plug, and the other is a photovoltaic charging plug, thus facilitating the charging and discharging of the portable energy storage device 100.

[0056] In some optional embodiments, as shown in Figures 4 to 6, the portable energy storage device 100 further includes a magnetic ring 13b and a connecting wire 14 located inside the housing assembly 10. The magnetic ring 13b is disposed on the top of the housing assembly 10 and close to the communication module 13a. The connecting wire 14 passes through the magnetic ring 13b, that is, the connecting wire 14 passes through the center of the magnetic ring 13b, and one end of the connecting wire 14 is located outside the magnetic ring 13b and electrically connected to the power socket 1021, while the other end of the connecting wire 14 is located outside the magnetic ring 13b and electrically connected to the circuit board assembly 12. Since the magnetic ring 13b can form a magnetic field, it can absorb and suppress electromagnetic interference (EMI) and radio frequency interference (RFI) on the connecting wire 14. Therefore, the setting of the magnetic ring 13b can effectively suppress electromagnetic interference. On the one hand, this can prevent the interference from affecting the normal operation of the communication module 13a, thereby making the performance of the communication module 13a more stable and reliable. On the other hand, it can also prevent the electromagnetic interference generated by the portable energy storage device 100 from affecting or damaging the normal operation of other electronic devices, allowing the portable energy storage device 100 to operate in accordance with requirements in its electromagnetic environment 13b without causing unacceptable electromagnetic interference to any equipment in its environment, thus improving the electromagnetic compatibility (EMC) of the portable energy storage device 100.

[0057] The magnetic ring 13b can be an electromagnetic component, typically made of ferromagnetic or soft magnetic materials.

[0058] In some optional embodiments, as shown in Figures 4 to 6, the portable energy storage device 100 further includes a display component 15 located inside the housing assembly 10. The display component 15 is electrically connected to the circuit board assembly 12 and is disposed at the top of the housing assembly 10 along its height direction f3. The display surface of the display component 15 is exposed on the top surface of the housing assembly 10 along its height direction f3 to avoid the display surface of the display component 15 being blocked by the housing assembly 10, so that the user can view the content displayed on the display surface, such as displaying parameters such as power, time, voltage, temperature, charging status and discharging status. This allows the user to intuitively monitor and manage parameters such as voltage, temperature, charging status and discharging status of the battery pack 11, so that the user can understand the specific situation of the portable energy storage device 100 in a timely manner and improve the ease of use of the portable energy storage device 100.

[0059] In some optional embodiments, as shown in Figures 4 to 7, the housing assembly 10 includes a bottom housing 101 and a top housing 102 connected to the bottom housing 101. The bottom housing 101 and the top housing 102 are arranged along the height direction f3. The battery cell assembly 11 and the circuit board assembly 12 are both disposed inside the bottom housing 101, and the communication module 13a, the display assembly 15 and the power socket 1021 are all disposed on the top housing 102. Furthermore, the connecting wire 14 in this application includes a first sub-wire 141 and a second sub-wire 142. The first sub-wire 141 is located inside the top shell 102, and one end of the first sub-wire 141 is electrically connected to the power socket 1021. The other end of the first sub-wire 141 is connected to a first connector 1411. The second sub-wire 142 is located inside the bottom shell 101, and one end of the second sub-wire 142 is electrically connected to the circuit board 121. The other end of the second sub-wire 142 is connected to a second connector 1421. The second connector 1421 is detachably connected to the first connector 1411.

[0060] The battery cell assembly 11 and circuit board assembly 12 are housed in the bottom housing 101, while the communication module 13a, display assembly 15, and power socket 1021 are housed in the top housing 102. This avoids concentrating all components in the bottom housing 101, instead placing some components in the bottom housing 101 and others in the top housing 102, thus making full and rational use of the internal space of each housing and improving the space utilization of the housing assembly 10. At the same time, since the power socket 1021 and circuit board assembly 12 are housed in different housings and need to maintain an electrical connection, the connecting wire 14 is divided into a detachable first sub-wire 141 and a second sub-wire 142, which provides the possibility of placing the power socket 1021 and circuit board assembly 12 in different housings.

[0061] During assembly, the battery cell assembly 11 and the circuit board assembly 12 are generally assembled together first. Then, the assembled battery cell assembly 11 and circuit board assembly 12 are installed and fixed inside the bottom shell 101. At this time, the second connector 1421 is located on top of the circuit board assembly 12 to prevent the bottom shell 101 from blocking the second connector 1421, so as to facilitate the subsequent connection between the second connector 1421 and the first connector 1411. Then, the communication module 13a, the display assembly 15, and the power socket 1021 are installed and fixed on the top shell 102. Next, the assembled top shell 102 is placed on top of the bottom shell 101, and the first connector 1411 of the first sub-beam 141 is connected to the second connector 1421 of the second sub-beam 142. Finally, the top shell 102 and the bottom shell 101 are fixed together, thereby completing the assembly of the portable energy storage device 100. During maintenance, the top shell 102 and bottom shell 101 are first disassembled, and then the first connector 1411 and the second connector 1421 are disassembled. This exposes components such as the battery cell assembly 11, circuit board assembly 12, communication module 13a, display assembly 15, and power socket 1021, making it easier to disassemble and inspect a specific module without having to disassemble each component individually, thus facilitating replacement and repair.

[0062] As described above, there are multiple power sockets 1021 in this application. Each power socket 1021 is connected to a first sub-branch wire 141, and the first connector 1411 of each first sub-branch wire 141 is detachably connected to the second connector 1421 of a second sub-branch wire 142. Since the models of each first connector 1411 are different, the models of each second connector 1421 are also different. That is, the ports of each first connector 1411 are different, and the ports of each second connector 1421 are also different. This has a certain foolproof effect, so that each first connector 1411 can only be connected to the second connector 1421 that is compatible with its port, avoiding incorrect wiring and ensuring that the portable energy storage device 100 can be used normally.

[0063] In some alternative embodiments, the top shell 102 is provided with a handle 1022 located outside the top shell 102, so that when moving the portable energy storage device 100, the handle 1022 can be grasped to lift the portable energy storage device 100 and move the portable energy storage device 100 to the target location, thus making the movement of the portable energy storage device 100 more convenient.

[0064] Optionally, the top shell 102 is provided with handles 1022 on both sides in the height direction f3. The dual handles 1022 allow the portable energy storage device 100 to be moved by holding the handles 1022 with both hands, or by two people working together to move the portable energy storage device 100, thereby distributing the force and making it easier to move and transport the portable energy storage device 100.

[0065] In some optional embodiments, as shown in Figures 7 and 8, the top shell 102 has a first connecting post 1023 extending along the height direction f3 inside. The surface of the first connecting post 1023 facing the bottom shell 101 has a threaded hole 1024. The bottom shell 101 has a second connecting post 1011 extending along the height direction f3 inside. The second connecting post 1011 has a through hole 1012 that passes through the second connecting post 1011 and the bottom shell 101 along the height direction f3. The portable energy storage device 100 also includes a fastener 16d, which can be a bolt or screw, etc. The fastener 16d passes through the through hole 1012 and connects to the threaded hole 1024 to connect the bottom shell 101 and the top shell 102. The threaded connection makes the connection between the top shell 102 and the bottom shell 101 more secure; it is also easier to install and disassemble, making it more practical and convenient to operate. Meanwhile, since the nut of fastener 16d is located on the bottom side of the bottom shell 101, and there are no holes on the top surface of the top shell 102, and since when this portable energy storage device is placed on a flat surface such as a desktop, tabletop, or ground, the bottom surface of the bottom shell 101 is generally in contact with the surface, while the top surface of the top shell 102 is exposed to the environment, the above-mentioned fixing method between the top shell 102 and the bottom shell 101 can also prevent rainwater and other liquids from entering the interior of the outer shell assembly 10 through the holes on the top surface of the top shell 102, thereby improving the waterproof performance of the outer shell assembly 10.

[0066] Furthermore, by forming a first connecting post 1023 inside the top shell 102 to form a threaded hole 1024, and forming a second connecting post 1011 inside the bottom shell 101 to form a through hole 1012, compared to forming a threaded hole 1024 directly on the side wall of the top shell 102 and a through hole 1012 directly on the side wall of the bottom shell 101, the radial dimensions of the first connecting post 1023 and the second connecting post 1011 can be locally increased to form a threaded hole 1024 and a through hole 1012 with larger radial dimensions. This ensures the connection stability between the top shell 102 and the bottom shell 101 without increasing the overall wall thickness of the top shell 102 and the bottom shell 101, thus reducing the overall weight of the portable energy storage device and making it easier to lift and move.

[0067] Optionally, the top shell 102 has a plurality of first connecting posts 1023 arranged circumferentially around the top shell 102. Correspondingly, the bottom shell 101 has a plurality of second connecting posts 1011 arranged circumferentially around the bottom shell 101. There are a plurality of fasteners 16d. Each fastener 16d passes through a through hole 1012 of a second connecting post 1011 and connects to a threaded hole 1024 of a first connecting post 1023 to realize the connection between the top shell 102 and the bottom shell 101. This can improve the connection stability between the top shell 102 and the bottom shell 101 and improve the load-bearing and fixing effect of the outer shell assembly 10.

[0068] For example, as shown in Figures 7 and 8, both the top shell 102 and the bottom shell 101 are rectangular shells. The top shell 102 has six first connecting posts 1023 at its four corners and center, and six second connecting posts 1011 at its four corners and center. There are also six fasteners 16d. This design allows for a more uniform tensile force between the top shell 102 and the bottom shell 101, thereby improving the connection stability between them and enhancing the load-bearing and fixing effect of the outer shell assembly 10.

[0069] In this application, as shown in Figures 9 and 10, the circuit board assembly 12 generally includes a circuit board 121. The circuit board is equipped with electronic components, such as a bidirectional buck-boost converter and an inverter 122. Thus, when the battery cell assembly 11 of this application is discharging, the low-voltage DC (e.g., 3.2V DC) output by the battery cell assembly 11 is first boosted to 310V DC by the bidirectional buck-boost converter on the circuit board 121, and then inverted to 220V AC by the inverter 122 on the circuit board 121 to meet the charging requirements of the device to be charged, thereby realizing the discharge of the battery cell assembly 11. When the battery cell assembly 11 of this application is charging, the externally input 220V AC is first inverted to 310V DC by the inverter 122 on the circuit board 121, and then stepped down to 3.2V DC by the bidirectional buck-boost converter on the circuit board 121 to meet the charging requirements of the battery cell assembly 11, thereby realizing the charging of the battery cell assembly 11. Understandably, in practical use, the circuit board 121 can integrate different functional electronic components to meet the application requirements of the portable energy storage device, depending on the application scenario.

[0070] Furthermore, in addition to a bidirectional buck-boost converter and an inverter 122, the circuit board 121 in this application can also integrate a battery management system (BMS) so that the circuit board 121 can serve as a key component for monitoring, controlling and protecting the cell pack 11. For example, it can monitor and manage parameters such as voltage, temperature, charging status and discharging status of the cell pack 11, thereby avoiding dangerous situations such as overcharging, over-discharging, overcurrent and short circuit, ensuring the safe operation of the cell pack 11 and extending the working life of the cell pack 11.

[0071] In some optional embodiments, the circuit board assembly 12 further includes a protective shell 123, within which the circuit board 121 is disposed. This protects the electronic components on the circuit board 121 from external pressure when the bottom shell of the assembly is subjected to external compression, thereby ensuring the performance and lifespan of the circuit board 121. The protective shell 123 can be a metal shell, meaning it is made of metal such as stainless steel, iron, aluminum, aluminum alloy, copper, or copper alloy. Using metal for the protective shell provides greater rigidity compared to using plastic, increasing its resistance to deformation and thus better protecting the circuit board 121. It also shields the signals from the electronic components on the circuit board 121 to prevent interference with the communication performance of the communication module 13a.

[0072] In some alternative embodiments, to facilitate the electrical connection between the inverter 122 and the battery cell 11a, the circuit board 121 is provided with power terminals, which include a first power terminal 124a and a second power terminal 124b. The first power terminal 124a, the second power terminal 124b, the first terminal 113a and the second terminal 113b are located on the top of the housing assembly and are on the same side. This allows the strips to extend from the post 113 to be mechanically and electrically connected to the power terminal. Specifically, it allows the first strip 16b to extend from the first post 113a to be mechanically and electrically connected to the first power terminal 124a, and the second strip 16c to extend from the second post 113b to be mechanically and electrically connected to the second power terminal 124b. The circuit board 121 does not obstruct the first strip 16b or the second strip 16c; therefore, it is not necessary to drill holes in the circuit board 121 for the first strip 16b or the second strip 16c to pass through, nor is it necessary for the first strip 16b or the second strip 16c to extend from one end of the circuit board 121. By bending the circuit board 121 to the other side, the first contact plate 16b and the second contact plate 16c can be connected between the corresponding power terminals and poles. For example, the first contact plate 16b is connected between the corresponding first power terminal 124a and the first pole 113a, and the second contact plate 16c is connected between the corresponding second power terminal 124b and the second pole 113b. This improves the rationality of the wiring of the portable energy storage device, makes the wiring layout simpler and more reasonable, and enables the connection of electrical lines to be completed quickly. The wiring is simple, the layout is neat, the reliability is high, the safety is also high, and it is easy to trace and find faults in case of failure, reducing the failures caused by complex wiring.

[0073] Optionally, the first electrode 16b can be electrically connected to the first power terminal 124a via bolts, screws, etc. This design reduces the number of connecting wires or connectors between the battery cell assembly 11 and the circuit board assembly 12. Furthermore, the first electrode 16b is a thin sheet structure capable of deformation. This deformation of the first electrode 16b absorbs the significant expansion force of the battery cell assembly 11 in the later stages of its cycle life, thereby protecting the circuit board 121 from deformation and damage. Similarly, the second electrode 16c can also be electrically connected to the second power terminal 124b via bolts, screws, etc. This design reduces the number of connecting wires or connectors between the battery cell assembly 11 and the circuit board assembly 12. Moreover, the second electrode 16c is a thin sheet structure capable of deformation. This deformation of the second electrode 16c absorbs the significant expansion force of the battery cell assembly 11 in the later stages of its cycle life, thereby protecting the circuit board 121 from deformation and damage.

[0074] In this application, as shown in Figures 10 and 11, both the first power terminal 124a and the second power terminal 124b can be located inside the protective shell 123. The protective shell 123 has a first clearance notch 1231a on its end face in the height direction f3 to expose the first power terminal 124a. The protective shell 123 also has a second clearance notch 1231b on its end face in the height direction f3 to expose the second power terminal 124b. This prevents the first power terminal 124a and the second power terminal 124b from being blocked by the protective shell 123, thereby facilitating the connection between the first tab 16b and the first power terminal 124a, and facilitating the connection between the second tab 16c and the second power terminal 124b.

[0075] Furthermore, referring to Figures 4, 9 to 11, both the first power terminal 124a and the second power terminal 124b are located on the top of the housing assembly 10. The protective shell 123 has a through wire hole 1232 on the surface facing away from the battery cell assembly 11. The through wire hole 1232 is located at the bottom of the housing assembly 10 in the height direction f3. The second sub-branch wire 142 of the connecting cable 14 is electrically connected to the circuit board 121, and the second sub-branch wire 142 of the connecting cable 14 passes through the through wire hole 1232 and extends to the top of the housing assembly 10, where it is electrically connected to the first sub-branch wire 141, thereby realizing the electrical connection with the power socket 1021. That is, one end of the second sub-branch wire 142 of the connecting cable 14 is electrically connected to the circuit board 121, and the other end is electrically connected to the power socket 1021 through the first sub-branch wire 141. Through the above design, the electrical connection point of the second sub-beam 142 to the circuit board 121 and the power terminals (i.e., the first power terminal 124a and the second power terminal 124b) can be respectively located at both ends of the circuit board 121 in the height direction f3, avoiding concentration at one point on the circuit board 121. This can prevent the second sub-beam 142 and the bar (i.e., the first bar 16b and the second bar 16c) from getting tangled together, thereby improving the wiring rationality of the portable energy storage device and reducing faults caused by complex wiring.

[0076] In some optional embodiments, the protective shell 123 has a protrusion 1233 on the surface facing away from the battery cell assembly 11. The protrusion 1233 has a fixing hole 1234 for cable ties to pass through, so that the second sub-branch wire 142 of the connecting cable 14 can be fixed to the protrusion 1233 by the cable tie, thereby facilitating the fixing of the second sub-branch wire 142 of the connecting cable 14. By binding and guiding the second sub-branch wire 142 of the connecting cable 14 through the cooperation of the protrusion 1233 and the cable tie, the layout of the second sub-branch wire 142 of the connecting cable 14 can be made simpler, thereby avoiding the problems of messy, cross-distributed, and tangled second sub-branch wires 142 of the connecting cable 14. In this way, it is easy to trace and find in case of failure, and it is convenient for maintenance personnel to identify the second sub-branch wire 142 of the connecting cable 14, so as to facilitate maintenance personnel to perform maintenance and repair.

[0077] In addition, as mentioned above, the protective shell 123 in this application is made of metal. If a wiring groove is directly opened on the protective shell 123 to hold the second sub-wiring wire 142 of the connecting wire 14 in the wiring groove of the protective shell 123, the second sub-wiring wire 142 of the connecting wire 14 can be bound and guided. Since opening a wiring channel is equivalent to removing a portion of the material from the protective shell 123, it can easily affect the structural strength of the protective shell 123. Furthermore, since the protective shell 123 of the circuit board assembly 12 is made of metal, directly embedding the second sub-wire 142 of the connecting wire 14 in the wiring channel could easily cause it to be cut by the protective shell 123. Therefore, this application provides a protrusion 1233 on the protective shell 123 and a fixing hole 1234 on the protrusion 1233 to secure the second sub-wire 142 of the connecting wire 14 with cable ties. This reduces contact between the second sub-wire 142 and the protective shell 123, decreasing the likelihood of the second sub-wire 142 being cut by the protective shell 123. It also avoids affecting the structural strength of the protective shell 123, allowing the protective shell 123 to provide more effective protection for components such as the circuit board 121 and the inverter 122.

[0078] Optionally, there may be multiple protrusions 1233. Multiple protrusions 1233 used to fix the same second sub-branch wire 142 are arranged along the height direction f3 on the protective shell 123. This allows the same second sub-branch wire 142 to be fixed by multiple protrusions 1233, thereby stably fixing the second sub-branch wire 142 on the protective shell 123 and preventing the second sub-branch wire 142 from becoming tangled or twisted together.

[0079] In some optional embodiments, as shown in Figures 8, 9, and 10, the protective shell 123 of the circuit board assembly 12 has a first side 123a and a second side 123b oppositely disposed in the second direction f2. The first side 123a has a first ventilation opening 1235 extending along the second direction f2, and the second side 123b has a second ventilation opening 1236 extending along the second direction f2. The first ventilation opening 1235 and the second ventilation opening 1236 are connected, and a fan 125 is installed at the first ventilation opening 1235. The bottom shell 101 of the outer shell assembly has a third side 101a and a fourth side 101b oppositely disposed in the second direction f2. The third side 101a has a third ventilation opening 1013 extending along the second direction f2. 013 is connected to the first vent 1235, and the fourth side 101b is provided with a fourth vent 1014 that runs through the second direction f2. The fourth vent 1014 is connected to the second vent 1236. This allows the fan 125 located at the first vent 1235 to form heat convection through the second vent 1236, the third vent 1013 and the fourth vent 1014, causing the air around the circuit board 121 and the inverter 122 to flow, thereby removing the heat from the circuit board 121 and the inverter 122. This achieves heat dissipation and cooling of the circuit board 121 and the inverter 122, preventing overheating and overload, and thus helping to ensure the normal operation of the circuit board assembly 12 and improve the safety of the portable energy storage device.

[0080] In this application, when the fan 125 is turned on to dissipate heat from the circuit board 121, for example, the gas outside the bottom shell 101 enters the interior of the bottom shell 101 through the third vent 1013 under the action of the fan 125, and then enters the protective shell 123 under the action of the fan 125 and blows it onto the circuit board 121, taking away the heat from the circuit board 121. Then it is discharged from the main protective shell 123 through the second vent 1236, and finally discharged from the outer bottom shell 101 through the fourth vent 1014, thereby achieving the effect of dissipating heat from the circuit board 121 and the inverter 122. In another example, the gas outside the bottom shell 101 enters the interior of the bottom shell 101 through the fourth vent 1014 under the action of the fan 125, and enters the protective shell 123 through the second vent 1236 and flows through the circuit board 121, taking away the heat of the circuit board 121. Then, under the action of the fan 125, the gas is discharged outside the protective shell 123, and finally discharged outside the bottom shell 101 through the third vent 1013, thereby achieving the effect of heat dissipation for the circuit board 121.

[0081] Furthermore, the projection of the first vent 1235 on the housing assembly 10 at least partially overlaps with the third vent 1013, and the projection of the second vent 1236 on the housing assembly 10 at least partially overlaps with the fourth vent 1014. This can accelerate the flow rate of the gas, thereby improving the heat dissipation effect of the fan 125 on the circuit board 121 and the inverter 122.

[0082] In some optional embodiments, the portable energy storage device further includes a first dustproof net 17a and a second dustproof net 17b, both of which are disposed inside the bottom shell 101 of the outer casing assembly. The first dustproof net 17a covers the third vent 1013, and the second dustproof net 17b covers the fourth vent 1014. This allows the first dustproof net 17a and the second dustproof net 17b to prevent large and medium-sized particles from entering the interior of the bottom shell 101, thereby avoiding any impact on the operation of the battery cell assembly 11 and the circuit board assembly 12 inside the bottom shell 101.

[0083] In some optional embodiments, as shown in Figures 4, 11, 12, and 13, the portable energy storage device 100 further includes a fixing component 18 disposed inside the housing assembly 10. The fixing component 18 includes a connector 181 and two fixing members 182. Each fixing member 182 is connected to the housing assembly 10. Multiple battery cells 11a are located between the two fixing members 182. One fixing member 182 covers the large surface 112 of one end of the battery cell 11a, and the other fixing member 182 covers the large surface 112 of the battery cell 11a at the other end. The two fixing members 182 are connected by the connector 181 so that the multiple battery cells 11a can be fixed inside the housing assembly 10 by the fixing component 18. The two fixing members 182 are respectively connected to the circuit board assembly 12. Specifically, this application includes one fixing member 182 covering the large surface 112 of the battery cell 11a at one end, and another fixing member 182 covering the large surface 112 of the battery cell 11a at the other end. The two fixing members 182 are connected by a connector 181 to connect the battery cell assembly 11 and the fixing component 18. Each fixing member 182 is connected to the housing assembly 10 to fix the battery cell assembly 11 inside the housing assembly 10. The two fixing members 182 are also connected by a circuit board assembly 12.

[0084] Therefore, the two fixing members 182 can be fixed not only by the connector 181, but also by the circuit board assembly 12. This means that each fixing member 182 is constrained by both the connector 181 and the circuit board assembly 12, effectively preventing the two fixing members 182 from moving. This avoids applying force to the connection between the fixing members 182 and the outer casing assembly 10, which would affect the connection stability. Consequently, the battery cell assembly 11 can be stably installed inside the outer casing assembly 10 by the fixing assembly 18. This effectively prevents the battery cell assembly 11 from shaking or shifting during the operation of the portable energy storage device 100, thus avoiding damage to the battery cell assembly 11 caused by shaking or shifting. This extends the service life of the battery cell assembly 11 and reduces the problem of poor contact between the battery cell assembly 11 and the circuit board assembly 12 due to shaking or shifting.

[0085] In addition, since the circuit board assembly 12 is located on the side where the small face 111 of the battery cell 11a is located, the displacement of the circuit board assembly 12 can be minimized, so that the circuit board assembly 12 can provide more effective constraint on the fixing member 182, improve the connection stability between the fixing member 182 and the housing assembly 10, and thus make it more conducive to the stable installation of the battery cell assembly 11 inside the housing assembly 10 through the fixing member 18, and avoid the battery cell assembly 11 from shaking or displacing.

[0086] Optionally, the fastener 182 in this application can be made of metal, such as stainless steel, iron, aluminum, aluminum alloy, copper, copper alloy, etc. Compared with the material of plastic, the fastener 182 can have relatively strong structural strength, thereby enabling the battery cell assembly 11 to be more securely fixed inside the housing assembly 10.

[0087] In some optional embodiments, as shown in Figures 11 and 12, each fastener 182 has a first connecting protrusion 1821 protruding from the surface facing away from the large surface 112. Each first connecting protrusion 1821 has a threaded connection hole 1822 on the surface facing away from the large surface 112. The protective shell 123 of the circuit board assembly has two opposite sides 123c in the second direction f2, wherein a first side 123a is formed on one of the opposite sides 123c, and a second side 123b is formed on the other opposite side 123c. Each opposite side 123c has a second connecting protrusion 1237 extending along the first direction f1. Each second connecting protrusion 1237 has a through hole 1238. The portable energy storage device also includes a locking member 19b, which passes through the through hole 1238 and connects to the threaded connection hole 1822 to realize the connection between the circuit board assembly 12 and the fastener 182. The threaded connection makes the connection between the circuit board assembly 12 and the fastener 182 more secure; it is also easy to install and disassemble, making it highly practical and convenient to operate.

[0088] The locking element 19b can be a bolt or screw, etc.

[0089] In some optional embodiments, the connector 181 may be a threaded component, a snap-fit ​​component, or a flexible component. Optionally, the connector 181 may be a flexible component, such as a cable tie or strap, with multiple battery cells 11a located between two fixing components 182, and the connector 181 sleeved around the battery cell assembly 11 and the two fixing components 182. By using a flexible component sleeved around the multiple battery cells 11a and the two fixing components 182, the multiple battery cells 11a and the two fixing components 182 can be fixed together, which is a relatively simple and easy-to-operate fixing method.

[0090] In some optional embodiments, as shown in FIG12, an elastic member 19a is provided between each fixing member 182 and the large surface 112 of the battery cell assembly 11. The elastic member 19a may be, but is not limited to, a component with elastic deformation capability such as a silicone component, a rubber component, a plastic component or a foam component. The elastic component 19a provides expansion space for the battery cell assembly 11. When the battery cell assembly 11 expands, it deforms by pressing the elastic component 19a, allowing it to expand adaptively, absorbing and dissipating the expansion force. This prevents the battery cell assembly 11 from squeezing the mounting plate during expansion, thus avoiding applying force to the connection between the fixing component 182 and the housing assembly and affecting their connection stability. Consequently, the battery cell assembly 11 can be stably installed inside the housing assembly via the fixing component 18. This effectively prevents the battery cell assembly 11 from shaking or shifting during the use of the portable energy storage device, thus avoiding damage to the battery cell assembly 11 caused by shaking or shifting, extending its service life, and reducing the problem of poor contact between the battery cell assembly 11 and the circuit board assembly due to shaking or shifting.

[0091] In this application, two battery cells 11a can be first attached together, then elastic members 19a can be attached to both sides of the two battery cells 11a, and then fasteners 182 can be used to attach them together. Finally, the cells are pressed to the set force by an extruder and fixed by a strip.

[0092] In some alternative embodiments, as shown in Figures 13 and 14, the middle of the first tab 16b is recessed inward in the direction away from the battery cell assembly 11 to form a first recess 16b1. This can prevent the first tab 16b from contacting the metal parts (such as the fixing assembly 18) covering the periphery of the multiple battery cells 11a, so as to avoid short circuits or leakage.

[0093] Similarly, the middle of the second pad 16c is recessed inward in the direction away from the battery cell assembly 11 to form a second recess 16c1, which can prevent the second pad 16c from contacting the metal parts (such as the fixing assembly 18) covering the periphery of the multiple battery cells 11a, so as to avoid short circuit or leakage.

[0094] In some optional embodiments, the first recess 16b1 is provided with a first conductive connection hole 16b2 extending along the height direction f3. The first conductive connection hole 16b2 is used for the passage of a first conductive element (not shown) so that the first pad 16b can be electrically connected to the temperature and pressure sensor through the first conductive element. This allows the battery cell 11a to be electrically connected to the temperature and pressure sensor through the first conductive element, so that the temperature and pressure of the battery cell 11a can be collected by the temperature and pressure sensor for detection. At the same time, by forming the first conductive connection hole 16b2 in the first recess 16b1 for the first conductive element to pass through, even if the first conductive element passes through the first conductive connection hole 16b2 and is located on the side of the first pad 16b facing the battery cell assembly 11, the presence of the first recess 16b1 can, to a certain extent, prevent the first conductive element from contacting the metal parts covering the periphery of the multiple battery cells 11a, so as to avoid short circuits or leakage.

[0095] Similarly, the second recess 16c1 is provided with a second conductive connection hole 16c2 extending along the height direction f3. The second conductive connection hole 16c2 is used for the passage of the second conductive element (not shown), so that the second plate 16c can be electrically connected to the temperature and pressure sensor through the second conductive element. This allows the battery cell 11a to be electrically connected to the temperature and pressure sensor through the second conductive element, so that the temperature and pressure of the battery cell 11a can be collected by the temperature and pressure sensor for detection. At the same time, by forming the second conductive connection hole 16c2 in the second recess 16c1 for the second conductive element to pass through, even if the second conductive element passes through the second conductive connection hole 16c2 and is located on the side of the second plate 16c facing the battery cell assembly 11, the presence of the second recess 16c1 can, to a certain extent, prevent the second conductive element from contacting the metal parts covering the outer periphery of the multiple battery cells 11a, thereby avoiding short circuits or leakage.

[0096] Optionally, the temperature and pressure sensor may be a structure that integrates a temperature sensor and a pressure sensor into one unit to collect the temperature and pressure of the battery cell 11a; or, the temperature and pressure sensor may also include a temperature sensor and a pressure sensor that are separately arranged to collect the temperature and pressure of the battery cell 11a.

[0097] Furthermore, the temperature and pressure sensor can be integrated onto the circuit board as an electronic component, or it can be a separate module located on the inner wall of the housing assembly, without being integrated onto the circuit board.

[0098] Optionally, the structures of the first conductive element and the second conductive element may be the same or different, and the specific structure can be determined according to actual conditions. This application does not impose specific limitations. For example, the structures of the first conductive element and the second conductive element in this application are the same. The following uses the first conductive element as an example to further describe the specific structures of the first conductive element and the second conductive element in detail.

[0099] The first conductive component may include a threaded connector and a signal acquisition line. The threaded connector may be a bolt or screw, etc. The cylindrical part of the threaded connector is inserted into the first conductive connection hole 16a2. One end of the signal acquisition line is provided with a conductive ring, which is sleeved on the outer periphery of the threaded connector and sandwiched between the first plate 16b and the head of the threaded connector. The other end of the signal acquisition line is connected to a temperature and pressure sensor.

[0100] Furthermore, when the temperature and pressure sensor is integrated on the circuit board as an electronic component, the other end of the signal acquisition line is electrically connected to the circuit board so as to electrically connect the circuit board to the temperature and pressure sensor.

[0101] This application also discloses an energy storage system having a portable energy storage device 100 as described in any of the foregoing embodiments. Specifically, the energy storage system may include an electrical device and the portable energy storage device 100 as described in any of the foregoing embodiments, the portable energy storage device 100 being used to supply power to the electrical device. It is understood that an energy storage system having the portable energy storage device 100 described above can bring the same or similar beneficial effects as the portable energy storage device 100, as detailed in the description of the embodiments of the portable energy storage device 100, which will not be repeated here.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A portable energy storage device, characterized in that, The portable energy storage device includes: A housing assembly having a first direction and a second direction that are perpendicular to each other; A battery cell assembly, disposed inside the housing assembly, comprising a plurality of battery cells arranged along a second direction, each battery cell having a cuboid structure, and each battery cell having two small faces opposite each other along the first direction, and also having two large faces opposite each other along the second direction, the area of ​​the large faces being larger than the area of ​​the small faces; and A circuit board assembly is disposed inside the housing assembly and located on the side where the small facet of each of the battery cells is located. The circuit board assembly is electrically connected to the battery cells of the battery cell group.

2. The portable energy storage device according to claim 1, characterized in that, The battery cell has two terminals arranged at intervals along the first direction. The terminals of two adjacent battery cells are connected in series by a connecting bar. Among the multiple terminals, there are a first terminal and a second terminal that are not electrically connected to other terminals. The first terminal and the second terminal are located on the same side of the housing assembly in the first direction. The portable energy storage device further includes a first electrode and a second electrode. The first electrode is electrically connected to the first pole and extends along the first direction to be mechanically and electrically connected to the circuit board assembly. The second electrode is electrically connected to the second pole and extends along the first direction to be mechanically and electrically connected to the circuit board assembly.

3. The portable energy storage device according to claim 2, characterized in that, The middle portion of the first pad is recessed inward in a direction away from the battery cell assembly to form a first recess; and / or, The middle part of the second pad is recessed inward in a direction away from the battery cell assembly to form a second recess.

4. The portable energy storage device according to claim 3, characterized in that, The housing assembly has a height direction that is perpendicular to both the first and second directions; The first recess is provided with a first conductive connection hole extending along the height direction. The first conductive connection hole is used for a first conductive element to pass through, so that the first pad is electrically connected to the temperature and pressure sensor through the first conductive element; and / or, The second recess is provided with a second conductive connection hole that extends along the height direction. The second conductive connection hole is used for the passage of a second conductive element so that the second bar can be electrically connected to the temperature and pressure sensor through the second conductive element.

5. The portable energy storage device according to claim 1, characterized in that, The housing assembly has a cuboid structure, the first direction is the length direction of the housing assembly, the second direction is the width direction of the housing assembly, and the housing assembly also has a height direction that is perpendicular to both the first and second directions.

6. The portable energy storage device according to claim 5, characterized in that, The housing assembly has a power socket at its top in the height direction, and the battery cell has terminals; The circuit board assembly includes a protective shell and a circuit board disposed within the protective shell. The circuit board is provided with a power connection terminal. The power connection terminal and the pole are both located at the top of the outer shell assembly, and the power connection terminal is located inside the protective shell. The protective shell has a first clearance notch on the end face in the height direction to expose the power connection terminal. The portable energy storage device further includes a power strip, which is electrically connected to the electrode post, and the power strip extends along the first direction to be mechanically and electrically connected to the power terminal. The protective shell has a through-hole on the surface facing away from the battery cell assembly. The through-hole is located at the bottom of the shell assembly in the height direction. The portable energy storage device also includes a connecting wire that is electrically connected to the circuit board. The connecting wire passes through the through-hole and extends to the top of the shell assembly to be electrically connected to the power socket.

7. The portable energy storage device according to claim 6, characterized in that, The protective shell has a raised portion on the surface facing away from the battery cell assembly. The raised portion has a fixing hole for cable ties to pass through, so that the connecting wires are fixed on the raised portion by the cable ties.

8. The portable energy storage device according to claim 6, characterized in that, The housing assembly includes a bottom shell and a top shell connected to the bottom shell. The bottom shell and the top shell are arranged along the height direction. The battery cell assembly and the circuit board assembly are both disposed inside the bottom shell, and the power socket is disposed on the top shell. The connecting wires include a first sub-wire and a second sub-wire. The first sub-wire is located inside the top shell, and one end of the first sub-wire is electrically connected to the power socket. The other end of the first sub-wire is connected to a first connector. The second sub-wire passes through a wire hole, and one end of the second sub-wire is electrically connected to the circuit board. The other end of the second sub-wire is connected to a second connector, and the second connector is detachably connected to the first connector.

9. The portable energy storage device according to claim 8, characterized in that, There are multiple power sockets, each power socket is connected to a first sub-branch wire, the first connector of each first sub-branch wire is detachably connected to the second connector of a second sub-branch wire, and each first connector has a different model.

10. The portable energy storage device according to claim 1, characterized in that, The housing assembly has a height direction that is perpendicular to both the first and second directions; The portable energy storage device also includes a communication module, which is detachably disposed at the top of the housing assembly in the height direction and located inside the housing assembly. The communication module is electrically connected to the circuit board assembly and is used to establish a communication connection with a smart terminal.

11. The portable energy storage device according to claim 10, characterized in that, A power socket is provided on the top of the housing assembly; The portable energy storage device also includes a magnetic ring and a connecting wire located inside the housing assembly. The magnetic ring is disposed on the top of the housing assembly and close to the communication module. The connecting wire passes through the magnetic ring, with one end of the connecting wire located outside the magnetic ring and electrically connected to the power socket, and the other end of the connecting wire located outside the magnetic ring and electrically connected to the circuit board assembly.

12. The portable energy storage device according to claim 10, characterized in that, The circuit board assembly includes a protective shell and a circuit board. The protective shell is a metal protective shell, and the circuit board is disposed inside the protective shell and electrically connected to the battery cell.

13. The portable energy storage device according to claim 1, characterized in that, The circuit board assembly includes a protective shell and a circuit board disposed within the protective shell. The protective shell has a first side and a second side opposite to each other in the second direction. The first side is provided with a first vent that extends through the second direction, and the second side is provided with a second vent that extends through the second direction. The first vent and the second vent are connected, and a fan is installed at the first vent. The housing assembly has a third side and a fourth side opposite to each other in the second direction. The third side has a third vent that extends through the second direction and is connected to the first vent. The fourth side has a fourth vent that extends through the second direction and is connected to the second vent.

14. The portable energy storage device according to any one of claims 1-13, characterized in that, The portable energy storage device further includes a fixing component disposed inside the housing assembly. The fixing component includes a connector and two fixing members, each of which is connected to the housing assembly. The battery cell is located between the two fixing members, with one fixing member covering the large surface of the battery cell at one end and the other fixing member covering the large surface of the battery cell at the other end. The two fixing members are connected by the connector to fix multiple battery cells inside the housing assembly via the fixing component, and both fixing members are connected to the circuit board assembly.

15. The portable energy storage device according to claim 14, characterized in that, An elastic component is provided between each of the aforementioned fasteners and the large surface.

16. The portable energy storage device according to claim 14, characterized in that, Each of the fasteners has a first connecting protrusion on the surface facing away from the large surface, and each of the first connecting protrusions has a threaded connecting hole on the surface facing away from the large surface. The circuit board assembly has two opposite sides in the second direction, and each of the opposite sides has a second connecting protrusion extending along the first direction. Each of the second connecting protrusions has a through hole. The portable energy storage device also includes a locking member that passes through the through hole and connects to the threaded connection hole to connect the circuit board assembly and the fixing member.

17. The portable energy storage device according to claim 14, characterized in that, The connector is a flexible component, and it is sleeved around the plurality of battery cells and the two fixing components.

18. An energy storage system, characterized in that, The energy storage system has a portable energy storage device as described in any one of claims 1-17.

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