Energy storage device and battery pack

Abstract

The application provides an energy storage device and a battery pack, and belongs to the technical field of energy storage. The battery pack can include a box body, a battery module and a connecting device. The battery module is located in the box body. The connecting device includes a first connecting part and a second connecting part. The first connecting part is connected with the box body, and the second connecting part is used for connecting with an adjacent battery pack in a stacked state of multiple battery packs. The connecting device has a through hole for gripping. When the battery pack needs to be carried, an operator can directly grip through the through hole on the connecting device to realize stable carrying and flexible movement of the battery pack. When multiple battery packs need to be connected in parallel to increase the system capacity, the first connecting part in the connecting device can be fixed on the box body of one battery pack. Then, when another battery pack is stacked, the second connecting part of the connecting device is used to realize stable connection, so that reliable mechanical assembly between the two battery packs is completed.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to an energy storage device and a battery pack. Background Technology

[0002] With the continuous development of clean energy, energy storage systems have been widely applied in various fields. Energy storage systems can store excess electricity during peak energy production periods and release it during off-peak periods or when electricity demand increases, thereby effectively alleviating the problem of unstable clean energy supply and improving energy utilization efficiency and system reliability.

[0003] Energy storage systems typically consist of multiple battery packs, each with independent energy storage and management capabilities. These packs can be installed, replaced, or combined independently to meet varying capacity and application requirements. To facilitate operation during frequent handling, relocation, and installation, related technologies often incorporate handles on the battery packs for gripping and movement.

[0004] However, the existing handle structure can only be used to move battery packs, resulting in a relatively limited function of the handle structure. Utility Model Content

[0005] This application provides an energy storage device and a battery pack that can not only realize the transportation of the battery pack, but also realize the stable stacking and reliable mechanical connection between multiple battery packs.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, this application provides an energy storage device including multiple stacked battery packs; each battery pack includes a housing, a battery module, and a connection device; the housing has a receiving cavity, and the battery module is located in the receiving cavity; the connection device includes a first connection part and a second connection part, the first connection part being connected to the housing, and the second connection part being used to connect to the housing of an adjacent battery pack.

[0008] Multiple battery packs are stacked to form a modular, high-density energy storage unit, allowing for flexible configuration of system capacity based on actual power demand. Simultaneously, the first connecting part of the connecting device reliably secures the connecting device to the housing of the main battery pack, while the second connecting part connects with the housings of adjacent battery packs, achieving a stable connection between adjacent battery packs. This effectively improves the overall structural strength and mechanical stability, contributing to the safety and reliability of the energy storage equipment during transportation, installation, and operation.

[0009] In one possible implementation, the side panel of the enclosure is provided with a mounting groove, a first connecting portion is embedded in the mounting groove, and at least a portion of the second connecting portion protrudes from the top of the enclosure in the height direction of the enclosure; wherein, in the case of multiple battery packs stacked, the portion of the second connecting portion protruding from the top of the enclosure is used to be embedded in the mounting groove of the adjacent battery pack.

[0010] By embedding the first and second connecting parts of the connecting device into the mounting slots of adjacent battery packs, the stability of the entire structure in the stacked state is improved, and clear guidance and limiting are provided for the docking between adjacent battery packs. This allows operators to complete positioning and connection more quickly and accurately when installing multiple battery packs in a stack, thus significantly improving assembly efficiency. Furthermore, the mounting slots help reduce the extra space occupied by the connecting device in the width direction of the battery pack, optimizing the overall layout of the battery pack and making its structure more compact.

[0011] In one feasible approach, the mounting groove extends along the height of the enclosure and penetrates the top and bottom of the enclosure.

[0012] The mounting slot adopts a through-type design, extending vertically from the top to the bottom along the height of the enclosure. Its simple structure allows for easy molding via a single stamping or cutting process, effectively reducing the processing difficulty and production cost of the enclosure. Simultaneously, this through-type structure provides a continuous positioning channel for the connecting devices between adjacent battery packs, facilitating rapid alignment and smooth insertion of the connecting devices during stacking assembly, significantly improving the assembly efficiency and positional accuracy of multi-battery pack stacking.

[0013] In one possible implementation, the mounting slot includes a first mounting slot and a second mounting slot, which are located on the same side of the housing and are separated along the height direction of the housing; wherein, in the case of multiple battery packs stacked, in two adjacent battery packs, the first mounting slot of one battery pack and the second mounting slot of the other battery pack are connected to form a clearance space, and at least a portion of the connecting device is located within the clearance space.

[0014] By separating the mounting slots into a first mounting slot and a second mounting slot, and only making localized slots at the required locations, long through slots are avoided on the side walls of the enclosure. This effectively reduces the weakening of the overall enclosure structure, helps improve the structural rigidity of the enclosure, and reduces the risk of deformation under external impact, vibration, or internal stress. At the same time, because the slotted area on the enclosure side walls is smaller and more rationally distributed, it not only helps maintain the continuity of the side wall structure but also improves the aesthetic appearance.

[0015] In one possible implementation, the enclosure has two side panels arranged opposite each other along its width, each side panel having a mounting groove; there are two connecting devices, each corresponding to one of the two side panels.

[0016] By setting mounting slots and corresponding connection devices on both sides of the enclosure, when multiple battery packs need to be connected in parallel to increase system capacity or power output, the battery packs can be subjected to more uniform force during stacking or fixing, which effectively improves the stability of the overall connection structure.

[0017] In one feasible approach, the side of the connecting device facing away from the battery module is flush with the outer surface of the casing in the width direction of the casing.

[0018] By aligning the connecting device flush with the outer surface of the casing on the side opposite the battery module, structural protrusion is effectively avoided, resulting in a smoother and simpler overall appearance of the battery pack and significantly improving its aesthetics. Simultaneously, this design prevents the connecting device from occupying extra space, further enhancing space utilization efficiency.

[0019] In one possible implementation, the first connection portion includes at least one first connection hole through which a first fastener passes to securely connect the connection device to the battery pack.

[0020] In actual installation, the connecting device is first fitted against the side wall of the battery pack casing, ensuring precise alignment of the first connecting hole with the first mounting hole on the casing side wall. Then, the first fastener is passed through the first connecting hole and the first mounting hole in sequence and locked in place, achieving a reliable connection between the connecting device and the battery pack. This connection method is simple in structure and easy to assemble, helping to improve production and installation efficiency. Simultaneously, the mechanical fastening method provides high connection strength and resistance to loosening, significantly improving the reliability of the connection between the connecting device and the casing.

[0021] In one possible implementation, the second connection includes at least one second connection hole through which a second fastener passes to securely connect the connection device to an adjacent battery pack.

[0022] In the actual stacking process, the upper battery pack is vertically aligned with the lower battery pack, ensuring that the second connecting part of the connecting device in the lower battery pack is aligned with the mounting slot of the upper battery pack. Then, the upper battery pack is slowly lowered, sliding down the mounting slot until the second connecting hole aligns with the corresponding second mounting hole on the upper battery pack. Subsequently, the second fastener is passed through the second connecting hole and the second mounting hole and tightened, thus achieving a reliable fixed connection between the two battery packs. This process is simple to operate, accurate in positioning, and beneficial for improving the efficiency and reliability of multi-battery pack stacking assembly.

[0023] In one possible implementation, the second connecting portion includes a first connecting arm and a second connecting arm disposed opposite to each other, and an intermediate connecting section for connecting the first connecting arm and the second connecting arm; both the first connecting arm and the second connecting arm are provided with a second connecting hole.

[0024] By setting second connection holes on the first and second connecting arms respectively, the second mounting holes of the upper battery pack can be fixed at two points through the second fasteners, which significantly improves the connection rigidity and load-bearing capacity between adjacent battery packs, ensures a stable and reliable connection, and avoids loosening.

[0025] Secondly, this application provides a battery pack, including a housing, a battery module, and a connecting device; the housing has a receiving cavity; the battery module is located in the receiving cavity; the connecting device includes a first connecting portion and a second connecting portion, the first connecting portion being connected to the housing, and the second connecting portion being used to connect to adjacent battery packs in a stacked state; the connecting device has a through hole for gripping, at least a portion of which is surrounded by the first connecting portion and the second connecting portion.

[0026] When handling battery packs, operators can grip them directly through the through holes in the connecting device for stable handling and flexible movement. In other applications, when multiple battery packs need to be connected in parallel to increase system capacity or power output, the first connecting part of the connecting device can be fixed to the housing of one battery pack. Then, when stacking another battery pack, the second connecting part of the connecting device is used to achieve a secure connection, thus completing a reliable mechanical assembly between the two battery packs. Compared to traditional technologies that only have handles for handling, the connecting device in this application can not only handle battery packs but also perform positioning and connection fixation functions during the parallel operation of multiple battery packs, thereby improving the functional versatility of the connecting device.

[0027] In one possible implementation, the side panel of the enclosure is provided with a mounting groove, the first connecting part is embedded in the mounting groove, and at least a portion of the second connecting part protrudes from the top of the enclosure in the height direction of the enclosure; in the case of multiple battery packs stacked, the portion of the second connecting part protruding from the top of the enclosure is used to be embedded in the mounting groove of the adjacent battery pack.

[0028] By embedding the first and second connecting parts of the connecting device into the mounting slots of adjacent battery packs, the stability of the entire structure in a stacked state is improved, and clear guidance and limiting are provided for the docking between adjacent battery packs. This allows operators to complete positioning and connection more quickly and accurately when stacking multiple battery packs, significantly improving assembly efficiency. Furthermore, the mounting slots help reduce the extra space occupied by the connecting device in the width direction of the battery pack, optimizing the overall layout and making the structure more compact. Simultaneously, the through holes are not obstructed by the enclosure, ensuring that operators can easily reach into the through holes to grasp the battery packs when handling them, facilitating battery pack movement and positioning, and improving the safety and efficiency of the handling process.

[0029] In one feasible approach, the mounting groove extends along the height of the enclosure and penetrates the top and bottom of the enclosure.

[0030] The mounting slot adopts a through-type design, extending vertically from the top to the bottom along the height of the enclosure. Its simple structure allows for easy molding via a single stamping or cutting process, effectively reducing the processing difficulty and production cost of the enclosure. Simultaneously, this through-type structure provides a continuous positioning channel for the connecting devices between adjacent battery packs, facilitating rapid alignment and smooth insertion of the connecting devices during stacking assembly, significantly improving the assembly efficiency and positional accuracy of multi-battery pack stacking.

[0031] In one possible implementation, the mounting slot includes a first mounting slot and a second mounting slot, which are located on the same side of the housing and are separated along the height direction of the housing; wherein, in the case of multiple battery packs stacked, in two adjacent battery packs, the first mounting slot of one battery pack and the second mounting slot of the other battery pack are connected to form a clearance space, and at least a portion of the connecting device is located within the clearance space.

[0032] By separating the mounting slots into a first mounting slot and a second mounting slot, and only making localized slots at the required locations, long through slots are avoided on the side walls of the enclosure. This effectively reduces the weakening of the overall enclosure structure, helps improve the structural rigidity of the enclosure, and reduces the risk of deformation under external impact, vibration, or internal stress. At the same time, because the slotted area on the enclosure side walls is smaller and more rationally distributed, it not only helps maintain the continuity of the side wall structure but also improves the aesthetic appearance.

[0033] In one possible implementation, the enclosure has two side panels arranged opposite each other along its width, each side panel having a mounting groove; there are two connecting devices, each corresponding to one of the two side panels.

[0034] By setting mounting slots and corresponding connecting devices on both sides of the enclosure, additional stress points are provided when handling the battery pack, enhancing stability and safety during transport and reducing the risk of deformation or damage caused by unilateral stress. Furthermore, when multiple battery packs need to be connected in parallel to increase system capacity or power output, the stress on the battery packs during stacking or fixing is more even, effectively improving the stability of the overall connection structure.

[0035] In one feasible approach, the side of the connecting device facing away from the battery module is flush with the outer surface of the casing in the width direction of the casing.

[0036] By aligning the connecting device flush with the outer surface of the casing on the side opposite the battery module, structural protrusion is effectively avoided, resulting in a smoother and simpler overall appearance of the battery pack and significantly improving its aesthetics. Simultaneously, this design prevents the connecting device from occupying extra space, further enhancing space utilization efficiency.

[0037] In one possible implementation, the first connection portion includes at least one first connection hole through which a first fastener passes to securely connect the connection device to the battery pack.

[0038] In actual installation, the connecting device is first fitted against the side wall of the battery pack casing, ensuring precise alignment of the first connecting hole with the first mounting hole on the casing side wall. Then, the first fastener is passed through the first connecting hole and the first mounting hole in sequence and locked in place, achieving a reliable connection between the connecting device and the battery pack. This connection method is simple in structure and easy to assemble, helping to improve production and installation efficiency. Simultaneously, the mechanical fastening method provides high connection strength and resistance to loosening, significantly improving the reliability of the connection between the connecting device and the casing.

[0039] In one possible implementation, the second connection includes at least one second connection hole through which a second fastener passes to securely connect the connection device to another battery pack.

[0040] In the actual stacking process, the upper battery pack is vertically aligned with the lower battery pack, ensuring that the second connecting part of the connecting device in the lower battery pack is aligned with the mounting slot of the upper battery pack. Then, the upper battery pack is slowly lowered, sliding down the mounting slot until the second connecting hole aligns with the corresponding second mounting hole on the upper battery pack. Subsequently, the second fastener is passed through the second connecting hole and the second mounting hole and tightened, thus achieving a reliable fixed connection between the two battery packs. This process is simple to operate, accurate in positioning, and beneficial for improving the efficiency and reliability of multi-battery pack stacking assembly.

[0041] In one possible implementation, the second connecting part includes a first connecting arm and a second connecting arm disposed opposite to each other, and an intermediate connecting segment for connecting the first connecting arm and the second connecting arm; the first connecting part, the first connecting arm, the intermediate connecting segment and the second connecting arm are connected end to end to form a through hole; both the first connecting arm and the second connecting arm are provided with a second connecting hole; wherein, the side of the intermediate connecting segment opposite to the first connecting part is provided with a chamfer, and the chamfer is an angled angle or a rounded corner.

[0042] By providing second connecting holes on the first and second connecting arms respectively, dual-point fixation can be achieved with the second mounting holes of the upper battery pack using second fasteners. This significantly improves the connection rigidity and load-bearing capacity between adjacent battery packs, ensuring a stable and reliable connection and preventing loosening. Simultaneously, by providing a chamfered structure in the middle connecting section of the second connection part, whether the design is angled or rounded, it effectively improves guidance during assembly and reduces assembly difficulty. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the framework structure of a photovoltaic system provided in an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0045] Figure 3 yes Figure 2 An exploded view of the battery pack is shown.

[0046] Figure 4 This is a schematic diagram of the structure of a connecting device provided in an embodiment of this application;

[0047] Figure 5 This is a schematic diagram of another battery pack structure provided in an embodiment of this application;

[0048] Figure 6 This is a schematic diagram of another battery pack provided in the embodiments of this application;

[0049] Figure 7 This is a schematic diagram of a stacked structure of multiple battery packs provided in an embodiment of this application;

[0050] Figure 8 This is a schematic diagram of another connecting device provided in an embodiment of this application;

[0051] Figure 9 This is a partial enlarged view of a connecting device provided in an embodiment of this application;

[0052] Figure 10 This is a partial enlarged view of another connecting device provided in an embodiment of this application.

[0053] Figure label:

[0054] 1-Battery pack; 100-Box body; 101-Side panel; C-Receiving cavity; 200-Battery module; 300-Connecting device; 301-First connecting part;

[0055] 302-Second connecting part; 3021-First connecting arm; 3022-Second connecting arm; 3023-Intermediate connecting section; K-Through hole; S-Inner wall surface;

[0056] M - Mounting slot; M1 - First mounting slot; M2 - Second mounting slot; H - Clearance space; P1 - First connecting hole; P2 - Second connecting hole;

[0057] W1 - First mounting hole; W2 - Second mounting hole; 111 - First fastener; 222 - Second fastener; A - Included angle; 110 - Photovoltaic array;

[0058] 120 - Power converter; 130 - Power grid; 140 - External load; 150 - Energy storage device. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0060] In this application, the terms "first," "second," etc., are used only to distinguish different technical features or components, and do not indicate any priority or importance among these features, nor do they imply the number of technical features involved. Therefore, technical features described with "first," "second," etc., should be understood to include one or more.

[0061] In this application, unless otherwise expressly stated and limited, "multiple" means two or more.

[0062] Furthermore, in this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0063] In the accompanying drawings of the embodiments of this application, in order to clearly express different structural elements, solid structures such as parts and components are represented by guide lines, openings and holes are represented by broken lines, and hollow structures such as spaces and cavities are identified by guide lines with arrows.

[0064] This application provides an energy storage device. This device stores electrical energy using a specific medium and can release the stored energy when needed, achieving efficient utilization of electrical energy. As a flexible power regulation unit, this energy storage device can serve as a load regulator or backup power source, and is widely used in various scenarios such as household electricity, industrial and commercial parks, large-scale ground-mounted power plants, and integrated photovoltaic and energy storage systems.

[0065] Figure 1 This diagram illustrates a framework structure of a photovoltaic system, such as... Figure 1 As shown, the photovoltaic system includes a photovoltaic array 110, a power converter 120, an energy storage device 150, and a power grid 130 / external load 140. The power converter 120 integrates a DC / DC conversion circuit and a DC / AC conversion circuit. The energy storage device 150 can be located between the DC / DC conversion circuit and the DC / AC conversion circuit. The electrical energy generated by the photovoltaic array 110 is boosted or bucked by the DC / DC conversion circuit to charge the energy storage device 150. When the electrical energy generated by the photovoltaic array 110 is insufficient to supply power to the power grid 130 / external load 140, the electrical energy stored in the energy storage device 150 can be transferred to the power grid 130 / external load 140 via the DC / AC conversion circuit within the power converter 120. Conversely, the energy storage device 150 can also receive power from the power grid 130. The AC power output from the power grid 130 is converted to DC power by the DC / AC conversion circuit and then transmitted to the energy storage device 150, thus charging the energy storage device 150. Alternatively, the power converter 120 may only include a DC / AC conversion circuit, while the energy storage device 150 may have a built-in DC / DC conversion circuit, and the energy storage device 150 may directly receive the DC power generated by the photovoltaic array 110.

[0066] In some embodiments, the energy storage device 150 may include multiple battery packs stacked together to form a modular, high-density energy storage unit.

[0067] For a clearer illustration of the battery pack structure, please refer to [link / reference]. Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application. Figure 3 yes Figure 2 The diagram shows an exploded view of the battery pack. The battery pack 1 may include a housing 100 having a cavity C for housing and protecting internal core components. In some embodiments, the battery pack 1 may further include a battery module 200 located within the cavity C. The battery module 200 is composed of multiple battery cells and serves as the core energy unit of the battery pack 1, undertaking the main tasks of energy storage and charging / discharging of the system.

[0068] In some embodiments, such as Figure 2 and Figure 3 As shown, the battery pack 1 may also include a connecting device 300.

[0069] For a clearer illustration of the structure of the connecting device 300, please refer to [reference needed]. Figure 4 , Figure 4 This is a schematic diagram of a connecting device provided in an embodiment of this application. (In conjunction with...) Figure 2 , Figure 3 and Figure 4 The connecting device 300 in the battery pack 1 may include a first connecting part 301 and a second connecting part 302. The first connecting part 301 is connected to the housing 100 in the battery pack 1, and the second connecting part 302 is used to connect with adjacent battery packs 1 in the stacked state of multiple battery packs 1, thereby realizing the mechanical connection between adjacent battery packs 1 and improving the stability of the stacked structure.

[0070] For example, the connecting device 300 in the battery pack 1 can adopt a one-piece molded structure. This design helps to improve the overall structural rigidity and mechanical performance of the connecting device 300, effectively resisting the deformation of the battery pack 1 caused by loads such as gravity and vibration during stacking, transportation and operation, thereby ensuring the stability and long-term reliability of the connection.

[0071] In some embodiments, the connecting device 300 may be made of a metal material such as aluminum alloy. Since aluminum alloy has the advantages of low density and light weight, it can help control the overall weight of the connecting device 300 while meeting the structural strength requirements, thereby avoiding an increase in the weight of the battery pack 1.

[0072] In some embodiments, the connecting device 300 can be manufactured by a stamping process, thereby achieving integral molding. Alternatively, the connecting device 300 can also be manufactured using a sheet metal bending process.

[0073] In some embodiments, such as Figure 4 As shown, the connecting device 300 in the battery pack 1 has a through hole K for gripping. The through hole K has an inner wall surface S, and at least a portion of the inner wall surface S is surrounded by a first connecting portion 301 and a second connecting portion 302. For example, the first connecting portion 301 and the second connecting portion 302 together surround the through hole K, and the side surfaces of the first connecting portion 301 and the second connecting portion 302 facing into the hole together form the inner wall surface S.

[0074] The battery pack 1 provided in this application embodiment, in some usage scenarios, considering that the battery pack 1 usually has a relatively heavy weight (approximately between 35Kg and 70Kg), when it is necessary to move the battery pack 1, the operator can directly grip it through the through hole K on the connecting device 300 to achieve stable handling and flexible movement of the battery pack 1. In other usage scenarios, when multiple battery packs 1 need to be connected in parallel to increase system capacity or power output, the first connecting part 301 in the connecting device 300 can be fixed to the housing 100 of one battery pack 1; then, when stacking another battery pack 1, the second connecting part 302 of the connecting device 300 is used to achieve a stable connection with it, thereby completing the reliable mechanical assembly between the two battery packs 1. Compared with the conventional technology that only has a handle structure for handling, the connecting device 300 in this application can not only realize the handling of the battery pack 1, but also undertake the functions of positioning and connection fixation during the parallel operation of multiple battery packs 1, thereby improving the functional versatility of the connecting device 300.

[0075] Figure 5 This is a schematic diagram of another battery pack structure provided in an embodiment of this application. (Combined with...) Figure 4 and Figure 5 In the height direction (Z direction) of the housing 100, at least a portion of the second connecting portion 302 of the connecting device 300 protrudes from the top of the housing 100. For example, the second connecting portion 302 of the connecting device 300 protrudes entirely from the top of the housing 100.

[0076] This ensures that the through hole K is not blocked by the housing 100, thus ensuring that when the battery pack 1 needs to be moved, the operator's hand can be easily inserted into the through hole K to grasp it, which facilitates the movement and positioning of the battery pack 1 and improves the safety and efficiency of the handling process.

[0077] In some embodiments, such as Figure 5 As shown, the side panel of the housing 100 is provided with a mounting groove M. The first connecting part 301 of the connecting device 300 is embedded in the mounting groove M. When multiple battery packs 1 are stacked, the second connecting part 302 of the connecting device 300 protrudes from the top of the housing 100 and is used to be embedded in the mounting groove M of the adjacent battery pack 1. Thus, adjacent battery packs 1 are positioned and mechanically connected through the cooperation of the connecting device 300 and the mounting groove M, forming a stable stacked assembly structure along the height direction of the housing 100.

[0078] By embedding the first connecting portion 301 and the second connecting portion 302 of the connecting device 300 into the mounting slots M of adjacent battery packs 1, not only is the stability of the entire structure improved in the stacked state, but it also provides clear guidance and limiting for the docking between two adjacent battery packs 1. This allows operators to complete the positioning and connection more quickly and accurately when stacking multiple battery packs 1, thereby significantly improving assembly efficiency. In addition, the mounting slots M also help reduce the extra space occupied by the connecting device 300 in the width direction (X direction) of the battery pack 1, optimizing the overall layout of the battery pack 1 and making its structure more compact.

[0079] In this embodiment, the mounting slot M on the housing 100 can have multiple configuration options, allowing for flexible design based on specific application environment requirements to adapt to different installation conditions and structural strength needs. For clarity, this embodiment will illustrate several optional implementation methods as examples:

[0080] One possible implementation is, such as Figure 5 As shown, the mounting groove M on the housing 100 can extend along the height direction (Z direction) of the housing 100 and penetrate through the top and bottom of the housing 100. In other words, the mounting groove M is a through structure that extends vertically from the top to the bottom of the housing 100, forming a through channel.

[0081] The mounting slot M adopts a through-type design, extending vertically from the top to the bottom along the height direction (Z direction) of the housing 100. Its simple structure allows for easy forming through a single stamping or cutting process, effectively reducing the processing difficulty and production cost of the housing 100. Simultaneously, this through-type structure provides a continuous positioning channel for the connecting device 300 between adjacent battery packs 1, facilitating rapid alignment and smooth insertion of the connecting device 300 during stacking assembly, significantly improving the assembly efficiency and positional accuracy of stacked multi-battery packs 1.

[0082] For another alternative implementation, please refer to [link / reference]. Figure 6 , Figure 6 This is a schematic diagram of another battery pack structure provided in an embodiment of this application. The mounting groove M on the housing 100 may include a first mounting groove M1 and a second mounting groove M2, and the first mounting groove M1 and the second mounting groove M2 are located on the same side of the housing 100 and are separated along the height direction (Z direction) of the housing 100. It should be noted that in the same battery pack 1, the mounting groove M with a relatively lower position along the height direction (Z direction) of the housing 100 is defined as the first mounting groove M1, and the one with a relatively higher position is defined as the second mounting groove M2.

[0083] Figure 7 This is a schematic diagram of a stacked structure of multiple battery packs provided in an embodiment of this application. Combined with... Figure 6 and Figure 7 In the case of multiple battery packs 1 stacked together, in two adjacent battery packs 1, the first mounting slot M1 of one battery pack 1 and the second mounting slot M2 of the other battery pack 1 are connected to form a clearance space H, wherein at least a portion of the connecting device 300 is located within the clearance space H.

[0084] By separating the mounting slots M into a first mounting slot M1 and a second mounting slot M2, and only making localized slots at the required locations, long through slots are avoided on the side wall of the enclosure 100. This effectively reduces the weakening of the overall structure of the enclosure 100, helps to improve the structural rigidity of the enclosure 100, and reduces the risk of deformation under external impact, vibration, or internal stress. At the same time, because the slotted area on the side wall of the enclosure 100 is smaller and more rationally distributed, it not only helps to maintain the continuity of the side wall structure but also improves the aesthetic appearance.

[0085] In the embodiments of this application, such as Figure 5 and Figure 6 As shown, the housing 100 in the battery pack 1 may have two side plates 101 arranged opposite each other along its own width direction (X direction), and each side plate 101 has a mounting groove M. In some embodiments, there are also two connecting devices 300 in the battery pack 1, and the two connecting devices 300 correspond one-to-one with the two side plates 101.

[0086] By providing mounting slots M and corresponding connecting devices 300 on both sides of the housing 100, additional stress points are provided when handling the battery pack 1, enhancing stability and safety during handling and reducing the risk of deformation or damage caused by unilateral stress. Furthermore, when multiple battery packs 1 need to be connected in parallel to increase system capacity or power output, the force on the battery packs 1 during stacking or fixing can be more even, effectively improving the stability of the overall connection structure.

[0087] In some embodiments, in the width direction (X direction) of the housing 100, the side of the connecting device 300 facing away from the battery module 200 is flush with the outer surface of the housing 100.

[0088] By aligning the side of the connecting device 300 away from the battery module 200 flush with the outer surface of the housing 100, structural protrusion is effectively avoided, resulting in a flatter and simpler overall appearance for the battery pack 1 and significantly improving its aesthetics. Simultaneously, this design avoids the additional space occupied by the protruding connecting device 300, further improving space utilization efficiency and enabling a miniaturized design for the battery pack 1.

[0089] In some embodiments, the connecting device 300 can be completely embedded in the housing 100, flush with the side of the housing 100, or protrude from the side of the housing 100.

[0090] Figure 8 This is a schematic diagram of another connecting device provided in an embodiment of this application. For example... Figure 8 As shown, the first connecting portion 301 in the connecting device 300 may include at least one first connecting hole P1, and a first fastener 111 passes through the corresponding first connecting hole P1 to fix the connecting device 300 to the battery pack 1. For example, there are two first connecting holes P1 and two first fasteners 111.

[0091] Combination Figure 6 and Figure 8 In actual installation, the connecting device 300 is first fitted against the side wall of the battery pack 1 housing 100, ensuring precise alignment of the first connecting hole P1 with the first mounting hole W1 on the side wall of the housing. Then, the first fastener 111 is passed through the first connecting hole P1 and the first mounting hole W1 in sequence and locked in place, achieving a reliable connection between the connecting device 300 and the battery pack 1. This connection method is simple in structure and easy to assemble, helping to improve production and installation efficiency. Simultaneously, the mechanical fastening method provides high connection strength and resistance to loosening, significantly improving the reliability of the connection between the connecting device and the housing.

[0092] In this embodiment, the second connecting portion 302 in the connecting device 300 may include at least one second connecting hole P2, and a second fastener 222 passes through the corresponding second connecting hole P2 to fix the connecting device 300 to another battery pack 1. For example, there are two second connecting holes P2 and two fasteners 222.

[0093] Combination Figure 6 and Figure 8 In the actual stacking process, the upper battery pack 1 is aligned vertically with the lower battery pack 1, so that the second connecting part 302 of the connecting device 300 in the lower battery pack 1 is aligned with the mounting groove M of the upper battery pack 1. Then, the upper battery pack 1 is slowly lowered, sliding along the mounting groove M and moving downwards until the second connecting hole P2 is aligned with the corresponding second mounting hole W2 on the upper battery pack 1. Subsequently, the second fastener 222 is passed through the second connecting hole P2 and the second mounting hole W2 and locked, thus achieving a reliable fixed connection between the two battery packs 1. This process is simple to operate, accurate in positioning, and beneficial to improving the efficiency and reliability of multi-battery pack 1 stacking assembly.

[0094] It should be noted that, as Figure 8 The first fastener 111 and the second fastener 222 shown are screws. In other embodiments of this application, the first fastener 111 and the second fastener 222 may also be other structures such as fixing pins, and are not limited to these types. Figure 8 The structure shown.

[0095] Furthermore, the connection between the connecting device 300 and the battery pack 1 can be implemented in various ways: it can be installed and fixed from the outside of the battery pack 1 with screws, which is convenient for disassembly and maintenance; or it can be connected from the inside of the battery pack 1, which achieves a compact structure without external protrusions and improves the overall aesthetics.

[0096] In the embodiments of this application, such as Figure 8 As shown, the second connecting portion 302 in the connecting device 300 may include a first connecting arm 3021 and a second connecting arm 3022 disposed opposite to each other, and an intermediate connecting section 3023 for connecting the first connecting arm 3021 and the second connecting arm 3022.

[0097] The first connecting part 301, the first connecting arm 3021, the intermediate connecting section 3023 and the second connecting arm 3022 are connected end to end to form a through hole K; the first connecting arm 3021 and the second connecting arm 3022 are each provided with a second connecting hole P2.

[0098] By providing second connection holes P2 on the first connecting arm 3021 and the second connecting arm 3022 respectively, the upper battery pack 1 can be fixed at two points with the second mounting hole W2 through the second fastener 222, which significantly improves the connection rigidity and load-bearing capacity between adjacent battery packs 1, ensures a stable and reliable connection, and avoids loosening.

[0099] In the embodiments of this application, please refer to Figure 9 and Figure 10 , Figure 9 This is a partially enlarged view of a connecting device provided in an embodiment of this application. Figure 10 This is a partial enlarged view of another connecting device provided in an embodiment of this application. The middle connecting section 3023 in the second connecting part 302 has a chamfered structure on the side opposite to the first connecting part 301.

[0100] In one embodiment, such as Figure 9 As shown, the chamfer is an angled angle, also known as a C-angle. The angle A between the chamfered surface and the vertical direction ranges from 0.5° to 45°. This angled design gives the intermediate connecting section 3023 a sloping surface, which acts as a guide, allowing the upper battery pack 1 to slide smoothly into its mounting position during stacking, reducing alignment errors and improving assembly efficiency.

[0101] In another embodiment, such as Figure 10 As shown, this chamfer is a rounded corner, also known as an R-corner. The rounded corner design provides a smoother transition surface. Compared to a beveled design, a rounded corner further reduces frictional resistance during assembly, making the battery pack 1 stack more smoothly and reducing jamming. Furthermore, the rounded corner design eliminates any potential sharp edges, reducing the risk of operator injury due to improper handling and improving safety.

[0102] By setting a chamfer structure in the middle connecting section 3023 of the second connecting part 302, whether it is a beveled or rounded design, the guidance during the assembly process can be effectively improved and the assembly difficulty can be reduced.

[0103] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0104] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An energy storage device, characterized in that, Includes multiple stacked battery packs; Each of the battery packs includes a housing, battery modules, and a connection device; The housing has a receiving cavity, and the battery module is located inside the receiving cavity; The connecting device includes a first connecting part and a second connecting part. The first connecting part is connected to the housing, and the second connecting part is used to connect to the housing of an adjacent battery pack.

2. The energy storage device according to claim 1, characterized in that, The side panel of the box is provided with a mounting groove, the first connecting part is embedded in the mounting groove, and at least part of the second connecting part protrudes from the top of the box in the height direction of the box. In the case of multiple battery packs stacked together, the portion of the second connecting part protruding from the top of the housing is used to embed into the mounting slot of the adjacent battery pack.

3. The energy storage device according to claim 2, characterized in that, The mounting groove extends along the height of the housing and penetrates the top and bottom of the housing.

4. The energy storage device according to claim 2, characterized in that, The mounting slot includes a first mounting slot and a second mounting slot, the first mounting slot and the second mounting slot are located on the same side of the box and are separated along the height direction of the box; In the case of multiple battery packs stacked together, in two adjacent battery packs, the first mounting slot of one battery pack and the second mounting slot of the other battery pack are connected to form a clearance space, and at least a portion of the connecting device is located within the clearance space.

5. The energy storage device according to any one of claims 2-4, characterized in that, The housing has two side panels arranged opposite each other along its width, and each side panel has the mounting groove; there are two connecting devices, and the two connecting devices correspond one-to-one with the two side panels.

6. The energy storage device according to claim 1, characterized in that, In the width direction of the housing, the side of the connecting device facing away from the battery module is flush with the outer surface of the housing.

7. The energy storage device according to claim 1, characterized in that, The first connection portion includes at least one first connection hole, through which a first fastener passes to securely connect the connection device to the battery pack.

8. The energy storage device according to claim 1, characterized in that, The second connection portion includes at least one second connection hole, through which a second fastener passes to securely connect the connection device to an adjacent battery pack.

9. The energy storage device according to claim 8, characterized in that, The second connecting part includes a first connecting arm and a second connecting arm disposed opposite to each other, and an intermediate connecting section for connecting the first connecting arm and the second connecting arm; both the first connecting arm and the second connecting arm are provided with the second connecting hole.

10. A battery pack, characterized in that, Includes the housing, battery module, and connecting device; The box has a receiving cavity; The battery module is located within the receiving cavity; The connecting device includes a first connecting part and a second connecting part. The first connecting part is connected to the housing, and the second connecting part is used to connect to adjacent battery packs in a stacked state of multiple battery packs. The connecting device has a through hole for gripping, at least a portion of which is formed by the first connecting portion and the second connecting portion.

11. The battery pack according to claim 10, characterized in that, The side panel of the box is provided with a mounting groove, the first connecting part is embedded in the mounting groove, and at least part of the second connecting part protrudes from the top of the box in the height direction of the box. In the case of multiple battery packs stacked together, the portion of the second connecting part protruding from the top of the housing is used to embed into the mounting slot of the adjacent battery pack.

12. The battery pack according to claim 11, characterized in that, The mounting groove extends along the height of the housing and penetrates the top and bottom of the housing.

13. The battery pack according to claim 11, characterized in that, The mounting slot includes a first mounting slot and a second mounting slot, the first mounting slot and the second mounting slot are located on the same side of the box and are separated along the height direction of the box; In the case of multiple battery packs stacked together, in two adjacent battery packs, the first mounting slot of one battery pack and the second mounting slot of the other battery pack are connected to form a clearance space, and at least a portion of the connecting device is located within the clearance space.

14. The battery pack according to any one of claims 11-13, characterized in that, The housing has two side panels arranged opposite each other along its width, and each side panel has the mounting groove; there are two connecting devices, and the two connecting devices correspond one-to-one with the two side panels.

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