Energy storage device and electronic equipment

Abstract

The embodiment of the utility model relates to an energy storage device and electronic equipment. The energy storage device comprises an upper shell, a lower shell, a battery pack, an inner cover and sealant, the upper shell is detachably connected with the lower shell; the battery pack, the inner cover and the sealant are accommodated between the upper shell and the lower shell; the lower shell is provided with surrounding ribs, and the surrounding ribs are enclosed to form an accommodating cavity; the inner cover is arranged on the lower shell, the part, connected with the lower shell, of the inner cover is contained in the containing cavity, and the battery pack is contained between the inner cover and the lower shell; and the sealant is sealed between the inner cover and the surrounding bone. The energy storage device is sealed between the inner cover and the surrounding bone through the sealant, so that the battery pack arranged between the inner cover and the lower shell can be sealed by the sealant.

Description

Technical Field

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

[0002] With the rapid development of renewable energy technologies, energy storage systems are playing an increasingly important role in power supply stability and energy efficiency. Energy storage devices, especially battery packs used in electric vehicles, home energy storage, and industrial energy storage, have become an indispensable part of modern energy management. Battery packs typically consist of multiple battery cells, which can be lithium-ion batteries, nickel-metal hydride batteries, lead-acid batteries, etc. These cells generate heat during charging and discharging and are highly sensitive to environmental factors such as humidity, temperature, and corrosive chemicals.

[0003] In the process of developing this application, the applicant discovered that the sealing of the battery pack in an energy storage device is crucial to ensuring the performance and lifespan of the battery pack and preventing safety issues caused by gas leakage resulting from internal chemical reactions. Poor sealing can lead to direct contact between the battery pack's interior and the external environment, resulting in decreased battery pack performance, shortened lifespan, and even safety accidents. For example, excessive moisture content inside the battery pack accelerates the corrosion process and reduces electrochemical performance; while the infiltration of external moisture and harmful gases can cause short circuits inside the battery pack, increasing the risk of fire and explosion. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide an energy storage device and an electronic device that overcome or at least partially solve the above problems.

[0005] According to one aspect of the embodiments of this application, an energy storage device and an electronic device are provided. The energy storage device includes an upper housing, a lower housing, a battery pack, an inner cover, and a sealant. The upper housing and the lower housing are detachably connected. The battery pack, the inner cover, and the sealant are all housed between the upper housing and the lower housing. The lower housing is provided with a surrounding frame, which encloses a receiving cavity. The inner cover is disposed on the lower housing, and the portion of the inner cover connected to the lower housing is housed in the receiving cavity. The battery pack is housed between the inner cover and the lower housing. The sealant seals the space between the inner cover and the surrounding frame.

[0006] In one alternative embodiment, the inner cover is provided with an injection hole that communicates with the receiving cavity. The injection hole is used to inject sealing adhesive to form a sealant between the inner cover and the surrounding bone.

[0007] In one alternative embodiment, one end of the inner cover is recessed to form a receiving groove, and the glue injection hole is located at the other end of the inner cover; the battery pack includes a cell assembly and a PCB board, the cell assembly is disposed at one end of the PCB board; the cell assembly is received in the receiving groove; the other end of the PCB board is provided with a glue passage hole, the glue passage hole corresponds to the glue injection hole, the glue passage hole communicates with the receiving cavity, and the glue injection hole and the glue passage hole are used for injecting potting adhesive to form the sealant sealing between the inner cover and the surrounding frame.

[0008] In one alternative, the rib extends from the lower housing along a first direction; the inner cover has a connecting portion detachably connected to the lower housing and received within the receiving cavity; along the first direction, the size of the connecting portion is smaller than the size of the rib.

[0009] In one alternative embodiment, the lower housing is provided with a plurality of connecting posts, which are distributed around the accommodating cavity, and the connecting part is detachably connected to the connecting posts; the PCB board is provided with a plurality of clearance openings, the number of clearance openings being the same as the number of connecting posts, and one connecting post being disposed in one clearance opening.

[0010] In one alternative embodiment, the bottom of the receiving groove is provided with ribs that abut against the battery cell assembly.

[0011] In one alternative embodiment, a positioning protrusion is provided on the side of the PCB board facing away from the battery cell assembly; a positioning ring is provided on the lower housing, the positioning ring is received in the receiving cavity, and the positioning protrusion is inserted into the positioning ring.

[0012] In one alternative embodiment, the rib is provided with a wire passage groove, and the inner cover is provided with a clearance groove, the wire passage groove and the clearance groove being used for the passage of the battery pack wiring harness.

[0013] In one alternative embodiment, the lower housing is provided with a plurality of first mounting posts, and the surrounding rib includes a plurality of connecting blocks. The first mounting posts and connecting blocks are alternately arranged, and the plurality of first mounting posts and the plurality of connecting blocks together form the receiving cavity; the first mounting posts are used for detachable connection between the upper housing and the lower housing.

[0014] According to one aspect of the embodiments of this application, an electronic device is provided, which includes the energy storage device described above.

[0015] The beneficial effects of this application embodiment include: providing an energy storage device, including an upper housing, a lower housing, a battery pack, an inner cover, and a sealant; the upper housing and the lower housing are detachably connected; the battery pack, the inner cover, and the sealant are all housed between the upper housing and the lower housing; the lower housing is provided with a surrounding frame, the surrounding frame forming a receiving cavity; the inner cover is disposed on the lower housing, the portion of the inner cover connected to the lower housing is housed in the receiving cavity, and the battery pack is housed between the inner cover and the lower housing; the sealant seals between the inner cover and the surrounding frame. Through this energy storage device, by sealing between the inner cover and the surrounding frame with the sealant, the battery pack disposed between the inner cover and the lower housing can be sealed.

[0016] In addition, when using sealant to seal the battery pack, the sealant only needs to be applied between the inner cover and the lower housing frame, thus eliminating the need to apply sealant to the entire area between the inner cover and the lower housing. This can significantly reduce the amount of sealant used, lower costs, and reduce the weight of the energy storage device.

[0017] In addition, this application uses sealant between the inner cover and the surrounding ribs in the lower shell, so there is no need to pay attention to the wall thickness of the inner cover, thus the energy storage device provided by this application has a wide range of applications.

[0018] In addition, sealant can also seal the wiring harness in the battery pack, improving the sealing reliability of the battery pack. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This is an exploded diagram of one implementation of an energy storage device in the prior art.

[0021] Figure 2 This is a cross-sectional view of another implementation of energy storage devices in the prior art;

[0022] Figure 3 This is a schematic diagram of the energy storage device provided in the embodiments of this application;

[0023] Figure 4 This is an exploded schematic diagram of the energy storage device provided in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the lower housing provided in an embodiment of this application;

[0025] Figure 6This is a schematic diagram of the battery pack disposed on the lower housing according to an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the inner cover arrangement and the lower shell provided in the embodiments of this application;

[0027] Figure 8 This is a schematic diagram of the inner cover provided in an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of the battery pack provided in an embodiment of this application. Detailed Implementation

[0029] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] To facilitate readers' understanding of the design concept of this application, a brief introduction to energy storage devices in the prior art is provided below.

[0032] Please see Figure 1 , Figure 1 This is an exploded view of one implementation of an energy storage device in the prior art. The prior art energy storage device 100p includes an upper shell 10p, a lower shell 20p, an upper inner chamber 30p, a lower inner chamber 40p, a battery pack (not shown), and a sealant 50p. The battery pack is housed within the upper inner chamber 30p and the lower inner chamber 40p, and the battery pack, upper inner chamber 30p, and lower inner chamber 40p form a whole housed between the upper shell 10p and the lower shell 20p. The sealant 50p is located around the closed sides of the upper inner chamber 30p and the lower inner chamber 40p. This sealing method is difficult to operate, has low manufacturability, and the upper inner chamber 30p and / or the lower inner chamber 40p have multiple outlet positions 3s, resulting in low sealing reliability.

[0033] Please see Figure 2 , Figure 2This is a cross-sectional view of another implementation of an energy storage device in the prior art. The prior art energy storage device 100q includes an upper shell 10q, a lower shell 20q, an upper inner compartment 30q, a lower inner compartment 40q, a battery pack 50q, and sealant (not shown). The battery pack 50q is housed within the upper inner compartment 30q and the lower inner compartment 40q, and the battery pack 50q, the upper inner compartment 30q, and the lower inner compartment 40q are integrally housed between the upper shell 10q and the lower shell 20q. A sealing groove 4s is provided on the side of the upper inner compartment 30q and / or the lower inner compartment 40q, and the sealant is located in the sealing groove 4s. This sealing method, because it requires the sealing groove 4s, imposes requirements on the thickness of the walls of the upper inner compartment 30q or the lower inner compartment 40q, thus limiting its applicability.

[0034] In addition, another existing technology for sealing the battery pack 50q involves injecting potting compound into the upper inner compartment 30q and the lower inner compartment 40q to seal the battery pack 50q. This sealing method requires a large amount of adhesive, is costly, and will significantly increase the weight of the energy storage device 100q.

[0035] In summary, many of the existing sealing methods are not satisfactory, so it is necessary to develop new energy storage devices.

[0036] Please see Figure 3 and Figure 4 The energy storage device 100 provided in this application embodiment includes an upper housing 10, a lower housing 20, an inner cover 30, a battery pack 40, and a sealant 50. The upper housing 10 and the lower housing 20 are detachably connected. The battery pack 40, the inner cover 30, and the sealant 50 are all housed between the upper housing 10 and the lower housing 20. The battery pack 40 is housed between the inner cover 30 and the lower housing 20. The sealant 50 seals between the inner cover 30 and the lower housing 20, thereby achieving a seal between the sealant 50 and the battery pack 40 housed between the inner cover 30 and the lower housing 20.

[0037] The upper housing 10 and the lower housing 20 described above can be detachably connected by screws. Specifically, the upper housing 10 is provided with multiple mounting holes (not shown in the figure) for detachable connection with the lower housing 20.

[0038] It is understood that there are multiple mounting holes and multiple mounting posts.

[0039] For the lower housing 20 mentioned above, please refer to Figure 5 The lower housing 20 is provided with a first mounting post 21, a second mounting post 22, a surrounding bone 23, a connecting post 24, and a positioning ring 25.

[0040] There are multiple first mounting posts 21 and multiple second mounting posts 22. The total number of first mounting posts 21 and second mounting posts 22 is the same as the number of mounting holes on the upper housing 10. One mounting hole corresponds to one first mounting post 21 or one second mounting post 22.

[0041] The surrounding bone 23 includes multiple connecting blocks 231. The first mounting posts 21 and the connecting blocks 231 are alternately arranged. The multiple first mounting posts 21 and the multiple connecting blocks 231 together form a receiving cavity 23s. Please refer to the attached document. Figure 4 , Figure 5 , Figure 6 and Figure 7 The receiving cavity 23s is used to receive the battery pack 40, the inner cover 30 and the sealant 50.

[0042] The second mounting post 22 is located between the edge of the surrounding bone 23 and the lower housing 20. The connection between the upper housing 10 and the lower housing 20 is strengthened by the setting of the second mounting post 22.

[0043] It is worth noting that in some embodiments, the second mounting post 22 may not be provided, and the upper housing 10 and the lower housing 20 may be detachably connected simply by the first mounting post 21 and the mounting hole engaging with screws.

[0044] It is worth noting that, in this embodiment, the plurality of connecting blocks 231 in the periphery 23 and the plurality of first mounting posts 21 enclose and form the receiving cavity 23s. In some other embodiments, the periphery 23 may also be formed by the joint enclosing of the plurality of connecting blocks 231.

[0045] The number of connecting posts 24 is multiple, and the multiple connecting posts 24 are distributed around the receiving cavity 23s. The connecting posts 24 are used to lock with the inner cover 30 by screws.

[0046] The positioning ring 25 is housed in the receiving cavity 23s and is used to position the battery pack 40 so that the battery pack 40 can be placed in the receiving cavity 23s.

[0047] Please refer to the above-mentioned inner cover 30 as well. Figure 7 and Figure 8 The inner cover 30 is disposed on the lower housing 20, and the inner cover 30 is provided with an assembly hole 31, a receiving groove 32, an injection hole 33 and a connecting part 34.

[0048] There are multiple assembly holes 31, which are used to secure the inner cover 30 to the connecting post 24 provided on the lower housing 20 by screws, so as to realize the detachable connection between the inner cover 30 and the lower housing 20. Each assembly hole 31 corresponds to one connecting post 24.

[0049] One end of the inner cover 30 is recessed to form a receiving groove 32, which is used for the placement of the cell assembly 41 in the battery pack 40.

[0050] It is worth noting that in some embodiments, the bottom of the receiving groove 32 is provided with ribs 321, which abut against the cell assembly 41 of the battery pack 40. The receiving groove 32 and the ribs 321 facilitate the positioning of the cell assembly 41, and the receiving groove 32 and the ribs 321 limit and support the cell assembly 41.

[0051] The other end of the inner cover 30 is provided with the glue injection hole 33, which is connected to the receiving cavity 23s. The glue injection hole 33 is used for injecting sealing glue to form the sealant 50 that seals between the inner cover 30 and the surrounding bone 23.

[0052] Please refer to the following: Figure 5 , Figure 7 and Figure 8 The connecting part 34 is detachably connected to the connecting post 24 of the lower housing 20, that is, the assembly hole 31 is provided in the connecting part 34.

[0053] It is worth noting that the connecting part 34 is housed in the receiving cavity 23s so that the portion connecting the inner cover 30 and the lower housing 20 is housed in the receiving cavity 23s.

[0054] It is worth noting that in some embodiments, please refer to the following: Figure 5 and Figure 8 The surrounding bone 23 extends from the lower housing 20 along a first direction D1; along the first direction D1, the dimension H1 of the connecting portion 34 is smaller than the dimension H2 of the surrounding bone 23. The first direction D1 can be a direction perpendicular to the lower housing 20. The first direction D1 can also be the direction in which the upper housing 10 and the lower housing 20 are stacked. With this arrangement, when the sealant 50 seals between the inner cover 30 and the surrounding bone 23, the sealant 50 can also seal the connecting portion 34 of the inner cover 30. When the inner cover 30 is locked to the lower housing 20 by screws, no additional sealing measures are required.

[0055] Please refer to the following: Figure 6 and Figure 7 The clearance slot 35 is used for the wiring harness 43 of the battery pack 40 to connect to external devices.

[0056] In some embodiments, the rib 23 of the lower housing 20 is provided with a wire passage groove 232, through which the wiring harness 43 of the battery pack 40 is connected to an external device after passing through the clearance groove 35.

[0057] For the battery pack 40 mentioned above, please refer to Figure 6 and Figure 7 The battery pack 40 is entirely housed between the inner cover 30 and the lower housing 20. The battery pack 40 includes a cell assembly 41, a PCB board 42, and a wiring harness 43. The wiring harness 43 is connected to the PCB board 42 and is used for connection to external devices. The cell assembly 41 is disposed at one end of the PCB board 42; the cell assembly 41 is housed in the receiving groove 32 of the inner cover 30; the other end of the PCB board 42 is provided with a glue-passing hole 421, which corresponds to the glue-injection hole 33 and communicates with the receiving cavity 23s. The glue-injection hole 33 and the glue-passing hole 421 are used for injecting potting compound to form a sealant 50 sealing the space between the inner cover 30 and the surrounding frame 23.

[0058] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 9 The PCB board 42 is provided with a plurality of clearance openings 422, the number of clearance openings 422 being the same as the number of connecting posts 24 provided in the lower housing 20, and one connecting post 24 being disposed in one clearance opening 422.

[0059] It is worth noting that in some embodiments, please refer to the following: Figure 5 and see Figure 9 A positioning protrusion 423 is provided on the side of the PCB board 42 facing away from the battery cell assembly 41; the positioning protrusion 423 is inserted into the positioning ring 25 provided on the lower housing 20. The positioning ring 25 facilitates the positioning of the PCB board 42 when it is placed on the lower housing 20, and also maintains a gap between the PCB board 42 and the lower housing 20, preventing damage to the electronic components on the PCB board 42.

[0060] For sealant 50 mentioned above, please refer to Figure 4 , Figure 6 and Figure 7 The sealant 50 can be a potting compound that has been poured into the injection hole 33 and then solidified. Alternatively, the sealant 50 can be a colloid with a sealing function that is directly applied between the inner cover 30 and the surrounding rib 23.

[0061] It is worth noting that since the battery pack 40 is housed between the inner cover 30 and the lower housing 20, and the portion connecting the inner cover 30 and the lower housing 20 is located within the receiving cavity 23s formed by the surrounding rib 23, the sealant 50 only needs to be applied between the inner cover 30 and the surrounding rib 23. Therefore, it is not necessary to use sealant 50 on the entire area between the inner cover 30 and the lower housing 20 to achieve sealing of the battery pack 40. This significantly reduces the amount of sealant 50 used, lowers costs, and reduces the weight of the energy storage device 100. In other words, the sealing solution using sealant 50 in this embodiment of the application can minimize the amount of adhesive used while meeting sealing requirements, and is simple and convenient to operate.

[0062] It is worth noting that the periphery of the inner cover 30 and the surrounding bone 23 have a preset gap g. This preset gap g facilitates air permeability and glue flow, making it easy to meet the potting requirements of the potting compound. That is, it is easy to form the sealant 50 between the inner cover 30 and the surrounding bone 23, which is easy to achieve automated production.

[0063] It is worth noting that the preset gap g can be reasonably set according to actual needs. For example, the preset gap g can be set to any value between 0.1mm and 1cm.

[0064] In addition, the sealing solution of the sealant 50 for the battery pack 40 in this embodiment of the application is to perform the glue injection operation in the open area (the glue injection hole 33 of the inner cover 30), which is highly operable.

[0065] In this embodiment, the energy storage device 100 includes an upper housing 10, a lower housing 20, a battery pack 40, an inner cover 30, and a sealant 50. The upper housing 10 and the lower housing 20 are detachably connected. The battery pack 40, the inner cover 30, and the sealant 50 are all housed between the upper housing 10 and the lower housing 20. The lower housing 20 is provided with a surrounding frame 23, which encloses a receiving cavity 23s. The inner cover 30 is disposed on the lower housing 20, and the portion of the inner cover 30 connected to the lower housing 20 is housed in the receiving cavity 23s. The battery pack 40 is housed between the inner cover 30 and the lower housing 20. The sealant 50 seals the space between the inner cover 30 and the surrounding frame 23. Through this energy storage device 100, the sealant 50 seals the battery pack 40 disposed between the inner cover 30 and the lower housing 20.

[0066] In addition, when the sealant 50 is used to seal the battery pack 40, the sealant 50 only needs to be sealed between the inner cover 30 and the surrounding bone 23 of the lower housing 20. Therefore, it is not necessary to use the sealant 50 in the entire area between the inner cover 30 and the lower housing 20 to achieve the sealing of the battery pack 40. This can greatly save the amount of sealant 50 used, reduce costs, and reduce the weight of the energy storage device 100.

[0067] In addition, this application uses sealant 50 between the inner cover 30 and the surrounding rib 23 provided in the lower shell 20, so there is no need to pay attention to the wall thickness of the inner cover 30, thus the energy storage device 100 provided by this application has a wide range of applications.

[0068] In addition, the sealant 50 can also seal the wiring harness 43 in the battery pack 40, improving the sealing reliability of the battery pack 40.

[0069] This application also provides an embodiment of an electronic device, which includes the energy storage device 100. The specific structure and function of the energy storage device 100 can be found in the above embodiments and will not be repeated here. The energy storage device 100 is used to supply power to the load in the electronic device. The electronic device may be a mobile phone, tablet, drone, unicycle or two-wheeled or more electric vehicle, or electric cleaning tool, etc.

[0070] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An energy storage device, characterized in that, include: Upper casing, lower casing, battery pack, inner cover, and sealant; The upper housing and the lower housing are detachably connected; the battery pack, inner cover, and sealant are all housed between the upper housing and the lower housing. The lower shell is provided with a surrounding bone, and the surrounding bone encloses and forms a receiving cavity; The inner cover is disposed on the lower housing, and the portion of the inner cover connected to the lower housing is received in the receiving cavity. The battery pack is received between the inner cover and the lower housing. The sealant is applied between the inner cover and the surrounding bone.

2. The energy storage device according to claim 1, characterized in that, The inner cover is provided with an injection hole, which communicates with the receiving cavity. The injection hole is used to inject sealing glue to form the sealant between the inner cover and the surrounding bone.

3. The energy storage device according to claim 2, characterized in that, One end of the inner cover is recessed to form a receiving groove, and the glue injection hole is located at the other end of the inner cover; The battery pack includes a cell assembly and a PCB board, wherein the cell assembly is disposed at one end of the PCB board; The battery cell assembly is housed in the receiving slot; The other end of the PCB board is provided with a glue passage hole, which corresponds to the glue injection hole and is connected to the receiving cavity. The glue injection hole and the glue passage hole are used for injecting potting glue to form the sealant between the inner cover and the surrounding bone.

4. The energy storage device according to claim 3, characterized in that, The surrounding bone extends from the lower shell along a first direction; The inner cover has a connecting portion, which is detachably connected to the lower housing and is housed in the receiving cavity; Along the first direction, the size of the connecting portion is smaller than the size of the surrounding bone.

5. The energy storage device according to claim 4, characterized in that, The lower housing is provided with multiple connecting posts, which are distributed around the accommodating cavity, and the connecting part is detachably connected to the connecting posts; The PCB board is provided with multiple clearance openings, the number of clearance openings being the same as the number of connecting posts, and one connecting post being disposed in one of the clearance openings.

6. The energy storage device according to claim 3, characterized in that, The bottom of the receiving groove is provided with ribs, which abut against the battery cell assembly.

7. The energy storage device according to claim 3, characterized in that, The PCB board has a positioning protrusion on the side facing away from the battery cell assembly; The lower housing is provided with a positioning ring, which is received in the receiving cavity, and the positioning protrusion is inserted into the positioning ring.

8. The energy storage device according to any one of claims 1-7, characterized in that, The frame is provided with a wire passage groove, and the inner cover is provided with a clearance groove. The wire passage groove and the clearance groove are used for the passage of the battery pack wiring harness.

9. The energy storage device according to any one of claims 1-7, characterized in that, The lower housing is provided with a plurality of first mounting posts, and the surrounding bone includes a plurality of connecting blocks. The first mounting posts and connecting blocks are alternately arranged, and the plurality of first mounting posts and the plurality of connecting blocks together form the receiving cavity. The first mounting post is used for the detachable connection of the upper housing and the lower housing.

10. An electronic device, characterized in that, Includes the energy storage device as described in any one of claims 1-9.

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