Battery assembly and terminal equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery assembly and terminal equipment, and the battery assembly comprises a protection plate, a mounting shell and a battery cell unit, the mounting shell comprises a shell; the shell is arranged on one side of the battery cell unit, a mounting cavity is formed in the shell, a mounting opening is formed in the shell, a connecting opening is formed in the side face, in the second direction, of the shell, and the mounting opening and the connecting opening both communicate with the mounting cavity; the protection plate is assembled into the mounting cavity through the mounting opening; according to the utility model, the protective plate can be accommodated through the mounting cavity of the shell, the shell can be used for insulation between the protective plate and the battery cell unit main body and can also provide protection for the protective plate, the whole structure is simple and reliable, the protective plate can be assembled in a modularized manner, the battery cell unit can be assembled in a modularized manner, and the battery cell unit can be assembled in a modularized manner. Therefore, protection insulating gummed paper and packaging gummed paper do not need to be used in the packaging process of the protection plate, and the consistency and reliability of the protection plate are improved.

Description

Technical Field

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

[0002] Protection board assemblies are a crucial component of battery structures in electronic products, especially lithium-ion batteries used in mobile electronics such as smartphones, laptops, and electric vehicles. The primary function of protection board assemblies is to prevent the battery from operating outside its safe operating range, including protection against overcharging, over-discharging, and extreme temperatures.

[0003] Currently, the existing protection board components and battery cells are mainly packaged in a soft-pack form, which mainly uses aluminum-plastic film for packaging. At the same time, insulating tape needs to be placed between the protection board components and the battery cells. In this packaging process, because the insulating tape is relatively soft and needs to be manually applied by assembly personnel, the consistency of the application is poor, and defects such as lifting are easy to occur, which will lead to a low yield of the finished battery after assembly. Utility Model Content

[0004] In view of this, the present invention provides a battery assembly and terminal device to solve the problem of poor reliability of existing battery packaging methods.

[0005] In a first aspect, this utility model provides a battery assembly having intersecting first and second directions, including: a protection plate, a mounting shell, and a battery cell unit; the mounting shell includes a housing; the housing is disposed on one side of the battery cell unit along the first direction, the housing has a mounting cavity inside, the housing has a mounting port on the side of the housing away from the battery cell unit along the first direction, and the housing has a connection port on the side of the housing along the second direction, both the mounting port and the connection port communicating with the mounting cavity; the protection plate is assembled into the mounting cavity through the mounting port; the battery cell unit has a tab on the side near the mounting shell, and the tab is electrically connected to the protection plate through the connection port.

[0006] Beneficial effects: The protection board can be accommodated through the mounting cavity of the housing. The housing can not only insulate the protection board and the main body of the cell unit, but also provide protection for the protection board. The overall structure is simple and reliable, and the protection board can be modularly assembled. The encapsulation process of the protection board no longer requires the use of protective insulating tape and encapsulation tape, which improves the consistency and reliability of the protection board and effectively simplifies the assembly process. It allows the protection board and the cell unit to be assembled more simply, effectively solving the problem of poor reliability of the existing battery encapsulation method.

[0007] In one alternative embodiment, the battery assembly further has a third direction, with the first direction, the second direction, and the third direction intersecting each other; the housing has an extension along the side of the third direction, the extension communicating with the mounting cavity, and the protective plate has a first connection portion for connecting with external components, the first connection portion extending out of the mounting cavity through the extension portion.

[0008] Beneficial effects: With this type of protrusion, the first connecting part can extend outward from the third direction side of the mounting cavity, which can avoid the first connecting part occupying the space of the first direction of the housing. The first connecting part with this type of protrusion can also adjust its extension direction and connection position more flexibly. The form is simple and reliable.

[0009] In one optional embodiment, the portion of the first connecting part extending out of the mounting cavity includes a first connecting section and a second connecting section that are bent. The first connecting section is arranged parallel to the outer wall of the housing on one side along a third direction, and the second connecting section is arranged parallel to the outer wall of the housing on one side along a second direction.

[0010] Beneficial effects: This type of first connector can better match the shape of the housing, and the protruding part of the first connector can be more compact.

[0011] In one optional embodiment, the protection plate is provided with a second connecting part on its side along the second direction, and the electrode tab enters the mounting cavity through the connecting port and is electrically connected to the protection plate through the second connecting part.

[0012] Beneficial effects: This type of connection allows for electrical connection with the second connection part by extending the electrode tab into the mounting cavity. Since extending the electrode tab is simpler, more reliable, and easier to implement, it simplifies the structure of the second connection part and improves the structural reliability of the protection board.

[0013] In one alternative embodiment, the second connecting portion is bent to form a receiving space, the electrode tab is inserted into the receiving space and welded to one side wall of the receiving space, the mounting port is connected to the connecting port, and the opening of the receiving space faces the side away from the battery cell along the first direction, and the electrode tab is inserted into the receiving space through the opening.

[0014] Beneficial effects: This connection method allows the tabs to make large-area contact with the inner wall of the housing, which not only ensures the reliability of the connection but also improves the stability of the electrical connection between the two. In addition, it allows the protection board to be connected to the tabs of the battery cell unit before it is assembled with the housing. At this time, the outside of the protection board is unobstructed, which makes it easier to weld and improves the convenience and accuracy of welding.

[0015] In one optional embodiment, the tab includes a first tab segment, a second tab segment, and a third tab segment connected in sequence. The first tab segment extends from the cell unit and extends along a first direction. The second tab segment is bent toward a second direction and is located on the side of the second connection portion away from the cell unit. The third tab segment is bent toward the receiving space and extends into the receiving space.

[0016] Beneficial effects: This type of electrode lug allows for more reliable entry into the receiving space while occupying less space, and also avoids contact between the first and second electrode lug segments and the second connecting part.

[0017] In one optional embodiment, the battery cell unit includes a battery cell body and an encapsulation portion for wrapping the battery cell body. One end of the encapsulation portion along a first direction forms an assembly end, and the assembly end is provided with a top sealing edge. The top sealing edge extends along the first direction and forms an assembly groove together with the assembly end. The housing is disposed in the assembly groove, and one side of the housing along a second direction forms a first mating surface. The first mating surface is provided with a first engaging portion, and the first mating surface and the first engaging portion together form a first mating groove. The top sealing edge is inserted into the first mating groove.

[0018] Beneficial effects: The assembly groove can guide the assembly process of the housing and improve the accuracy of the housing assembly. In addition, the top sealing edge can also prevent the housing from being misaligned along the second direction during assembly. Furthermore, the top sealing edge cooperates with the first mating groove to further improve the stability of the housing after assembly and prevent the housing from moving arbitrarily in the second direction.

[0019] In one alternative embodiment, the mounting housing further includes a cover plate, which is assembled to the housing and is used to seal the mounting opening.

[0020] Beneficial effects: The cover plate can effectively prevent foreign objects from entering the installation cavity, further improving the reliability of the protective plate after assembly.

[0021] In one optional embodiment, a second engaging portion is provided on the side of the cover plate corresponding to the first mating surface. The first mating surface and the second engaging portion together form a second mating groove. The connection port is located on the first mating surface in the second mating groove. The top sealing edge is inserted into the second mating groove. The electrode ear extends along the first direction and passes through the top sealing edge. At least one section of the electrode ear is located in the second mating groove.

[0022] Beneficial effect: The top sealing edge and the second mating groove can further improve the stability of the housing after assembly.

[0023] Secondly, this utility model also provides a terminal device, which includes: a body having a housing; and the aforementioned battery assembly disposed in the housing and connected to the body. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram of a battery assembly after assembly according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A partial exploded view of the battery assembly from a first-person perspective;

[0027] Figure 3 for Figure 1 A partial exploded view of the battery assembly from a second perspective;

[0028] Figure 4 for Figure 1 A partially enlarged schematic diagram of the battery assembly from another perspective;

[0029] Figure 5 for Figure 4 A schematic diagram of the battery assembly shown without a cover plate;

[0030] Figure 6 for Figure 5 A partially enlarged schematic diagram of the battery assembly shown;

[0031] Figure 7 for Figure 1 A three-dimensional schematic diagram of the housing of the battery assembly shown;

[0032] Figure 8 for Figure 1 The diagram shows a cross-sectional view of the battery assembly.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Protective plate; 101. First connecting part; 102. Second connecting part; 1021. Accommodating space;

[0035] 2. Install the casing;

[0036] 201. Housing; 2011. Mounting cavity; 2012. Mounting port; 2013. Connection port; 2014. Protrusion port; 2015. First mating surface; 2016. First engaging part; 2017. First mating groove; 2018. Holding structure;

[0037] 202, cover plate; 2021, second engaging part; 2022, second mating groove; 2023, blocking block.

[0038] 3. Battery cell unit; 301. Electrode tab; 302. Packaging section; 3021. Assembly end; 303. Top sealing edge; 304. Assembly slot;

[0039] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, a battery assembly is provided, having intersecting first direction X and second direction Y, including: a protection plate 1, a mounting shell 2, and a cell unit 3; the mounting shell 2 includes a housing 201; the housing 201 is disposed on one side of the cell unit 3 along the first direction X, the housing 201 has a mounting cavity 2011 inside, the housing 201 has a mounting port 2012 on the side of the housing 201 away from the cell unit 3 along the first direction X, and a connection port 2013 is provided on the side of the housing 201 along the second direction Y, the mounting port 2012 and the connection port 2013 are both connected to the mounting cavity 2011; the protection plate 1 is assembled into the mounting cavity 2011 through the mounting port 2012; the cell unit 3 has a tab 301 on the side near the mounting shell 2, and the tab 301 is electrically connected to the protection plate 1 through the connection port 2013.

[0043] The battery assembly using this embodiment can accommodate the protection board 1 through the mounting cavity 2011 of the housing 201. The housing 201 can not only provide insulation between the protection board 1 and the main body of the cell unit 3, but also provide protection for the protection board 1. The overall structure is simple and reliable, and the protection board 1 can be modularly assembled. This eliminates the need for protective insulating tape and encapsulation tape in the encapsulation process of the protection board 1, improving the consistency and reliability of the protection board 1 while effectively simplifying the assembly process. This allows for a simpler assembly of the protection board 1 and the cell unit 3, effectively solving the problem of poor reliability in the existing battery encapsulation method.

[0044] Wherein, the first direction X refers to Figure 2The middle arrow points to the direction of "X", and the second direction, Y, refers to... Figure 2 The direction indicated by the middle arrow "Y" is the third direction Z. Figure 2 The direction of "Z" indicated by the middle arrow.

[0045] Specifically, there is no limitation on the specific connection position of the tab 301 and the protection plate 1. The tab 301 can be extended and inserted into the mounting cavity 2011 through the connection port 2013 to make an electrical connection with the protection plate 1. Alternatively, a part of the protection plate 1 can be extended outward to form a mounting part. The mounting part extends out of the mounting cavity 2011 through the connection port 2013 and finally makes an electrical connection with the tab 301. The connection position and the connection form of the tab 301 and the protection plate 1 can be flexibly selected according to the requirements.

[0046] Additionally, it should be noted that the connection port 2013 is located on the side of the housing 201 along the second direction Y rather than on the bottom surface of the housing 201 along the first direction X. This avoids damaging the integrity of the bottom surface of the housing 201 along the first direction X, thereby enabling more reliable insulation of the main body of the protection plate 1 and the battery cell unit 3.

[0047] Among them, the battery cell unit 3 usually has two tabs 301. The number of connection ports 2013 is not specified. It can be one or more. The two tabs 301 can be connected to the corresponding positions of the protection board 1 through the same connection port 2013, or the two tabs 301 can be electrically connected to the protection board 1 through their respective connection ports 2013. It can be selected according to the requirements.

[0048] In one possible implementation, the battery assembly also has a third direction Z, and the first direction X, the second direction Y, and the third direction Z intersect each other; the housing 201 has an extension 2014 on the side of the third direction Z, the extension 2014 communicates with the mounting cavity 2011, and the protective plate 1 has a first connecting part 101 for connecting with external components. The first connecting part 101 extends out of the mounting cavity 2011 through the extension 2014. With this arrangement of the extension 2014, the first connecting part 101 can extend outward from the third direction Z side of the mounting cavity 2011, which can avoid the first connecting part 101 occupying the space of the housing 201 in the first direction X. The first connecting part 101 with this extension method can also more flexibly adjust its extension direction and connection position, and the form is simple and reliable.

[0049] It is understood that, as an alternative implementation, the protrusion 2014 may also be provided on the side of the housing 201 along the second direction Y.

[0050] It should be noted that the number of protrusions 2014 is not limited. There can be a single protrusion 2014 or protrusions 2014 can be provided on both sides of the housing 201 along the third direction Z. The selection can be made according to the number and position of the first connecting part 101 of the protective plate 1.

[0051] In one alternative embodiment, the portion of the first connecting part 101 extending out of the mounting cavity 2011 includes a first connecting segment and a second connecting segment that are bent. The first connecting segment is arranged parallel to the outer wall of the housing 201 along the third direction Z side, and the second connecting segment is arranged parallel to the outer wall of the housing 201 along the second direction Y side. This form of the first connecting part 101 can better match the shape of the housing 201, making the extended portion of the first connecting part 101 more compact.

[0052] In one possible implementation, the protective plate 1 is provided with a second connecting part 102 on its side along the second direction Y. The electrode tab 301 enters the mounting cavity 2011 through the connecting port 2013 and is electrically connected to the protective plate 1 through the second connecting part 102. In this connection method, the electrode tab 301 can be electrically connected to the second connecting part 102 by extending into the mounting cavity 2011. Since extending the electrode tab 301 is simpler, more reliable and easier to implement, the structure of the second connecting part 102 can be simplified and the structural reliability of the protective plate 1 can be improved.

[0053] The specific form of the second connecting part 102 is not limited. It can be columnar, sheet-like, etc., and can be a connecting surface with a flat surface or a connecting position with a groove.

[0054] In one possible implementation, the second connecting part 102 is provided with a receiving space 1021, the electrode 301 is inserted into the receiving space 1021 and welded to the second connecting part 102. In this connection method, the electrode 301 can make large-area contact with the inner wall of the receiving space 1021, which can not only ensure the reliability of the connection, but also improve the stability of the two when electrically connected.

[0055] Specifically, the opening direction of the accommodating space 1021 is not limited and can be any direction among the first direction X, the second direction Y, and the third direction Z.

[0056] In one possible implementation, the mounting port 2012 is connected to the connection port 2013, and the opening of the receiving space 1021 faces away from the battery cell unit 3 along the first direction X. The electrode tab 301 is inserted into the receiving space 1021 through the opening. This structural arrangement allows the protection plate 1 to be connected to the electrode tab 301 of the battery cell unit 3 before it is assembled with the housing 201. At this time, the outside of the protection plate 1 is not obstructed, which makes it easier to weld and improves the welding convenience and welding accuracy.

[0057] Specifically, when assembling the protection plate 1, the protection plate 1 is first kept in an inverted state, and the tab 301 does not need to be bent. At this time, the tab 301 can be directly inserted into the second connecting part 102 along the first direction X for welding. After welding is completed, the housing 201 is fitted onto the outside of the protection plate 1. After the protection plate 1 and the housing 201 are assembled, they are rotated 180 degrees together toward the side where the connecting port 2013 is located in the second direction Y. At this time, the housing 201 drives the protection plate 1 to the designated assembly position outside the cell unit 3. At this time, the tab 301 also enters the connecting port 2013 during the rotation process.

[0058] It is understood that, as an alternative implementation, the connection port 2013 may not be provided separately, and the tab 301 may extend into the mounting cavity 2011 through the mounting port 2012 and be inserted into the receiving space 1021.

[0059] Preferably, the second connecting part 102 is a U-shaped nickel sheet, and the bottom of the U-shaped nickel sheet can be a rounded transition or a folded transition.

[0060] The connection between the mounting port 2012 and the connection port 2013 means that the two together form a large opening.

[0061] In one possible implementation, the tab 301 includes a first tab segment, a second tab segment, and a third tab segment connected in sequence. The first tab segment extends from the battery cell 3 and extends along the first direction X. The second tab segment is bent toward the second direction Y and is located on the side of the second connection portion 102 away from the battery cell 3. The third tab segment is bent toward the receiving space 1021 and extends into the receiving space 1021. This type of tab 301 allows for more reliable entry into the receiving space 1021 while occupying less space, and also avoids the first and second tab segments from contacting the second connection portion 102.

[0062] In one possible implementation, the battery cell unit 3 includes a battery cell body and an encapsulation portion 302 for wrapping the battery cell body. One end of the encapsulation portion 302 along the first direction X forms an assembly end 3021. The assembly end 3021 is provided with a top sealing edge 303, which extends along the first direction X and forms an assembly groove 304 together with the assembly end 3021. The housing 201 is disposed in the assembly groove 304. The assembly groove 304 can guide the assembly process of the housing 201 and improve the accuracy of the housing 201 assembly. In addition, the top sealing edge 303 can also prevent the housing 201 from being misaligned along the second direction Y during assembly.

[0063] The specific form of the top sealing edge 303 is not limited. It can be a rectangular ring structure, a bent plate structure, or a block structure, as long as it can constrain the displacement of the shell 201 along the second direction Y.

[0064] Specifically, such as Figure 2 and 6 As shown, the top sealing edge 303 is a bent plate structure. The top sealing edge 303 extends along the first direction X. The top sealing edge 303 has a shorter section extending along the second direction Y and a longer section extending along the third direction Z. The assembly groove 304 formed by the top sealing edge 303 and the assembly end 3021 has an opening not only in the first direction X, but also on one side of the second direction Y. When the housing 201 is folded, it can directly enter the assembly groove 304 through this opening, which is beneficial to the folding assembly connection process of the housing 201.

[0065] In one possible implementation, a first mating surface 2015 is formed on one side of the housing 201 along the second direction Y. The first mating surface 2015 is provided with a first engaging portion 2016. The first mating surface 2015 and the first engaging portion 2016 together form a first mating groove 2017. The top sealing edge 303 is inserted into the first mating groove 2017. The top sealing edge 303 and the first mating groove 2017 cooperate to further improve the stability of the housing 201 after assembly and prevent the housing 201 from moving arbitrarily in the second direction Y.

[0066] It is understood that, as an alternative implementation, the first engaging part 2016 may not be provided, and the housing 201 may be fixedly connected to the first mating groove 2017 by an adhesive or the like.

[0067] Specifically, there is no limit to the number of first card assemblies 2016. There can be one first card assembly 2016 or multiple first card assemblies 2016 spaced apart, which can be selected according to the needs.

[0068] Furthermore, such as Figure 7As shown, a retaining structure 2018 is also provided inside the housing 201. The retaining structure 2018 is provided on the side wall of the mounting cavity 2011 along the second direction Y. The retaining structure 2018 can abut the protective plate 1 against the inner wall of the mounting cavity 2011 to prevent the protective plate 1 from moving or shaking freely in the mounting cavity 2011.

[0069] The specific form of the holding structure 2018 is not limited. It can be an elastic plate or elastic block, or a plate-shaped or block-shaped structure with an inclined guide surface, as long as it can fix the protective plate 1.

[0070] In one possible implementation, the mounting shell 2 further includes a cover plate 202, which is assembled and connected to the shell 201. The cover plate 202 is used to block the mounting opening 2012 and can effectively prevent foreign objects from entering the mounting cavity 2011, thereby further improving the reliability of the protection plate 1 after assembly.

[0071] It is understood that, as an alternative implementation, the cover plate 202 may be omitted, and the installation port 2012 may be sealed with sealing glue and sealing tape.

[0072] Specifically, there is no limitation on the method of fixing the cover plate 202 and the housing 201. It can be snap-fit, glued, or connected by additional fastening components.

[0073] In one possible implementation, a second engaging portion 2021 is provided on the side of the cover plate 202 corresponding to the first mating surface 2015. The first mating surface 2015 and the second engaging portion 2021 surround to form a second mating groove 2022. The connection port 2013 is located on the first mating surface 2015 in the second mating groove 2022. The top sealing edge 303 is inserted into the second mating groove 2022. The electrode tab 301 extends along the first direction X and passes through the top sealing edge 303. At least one part of the electrode tab 301 is located in the second mating groove 2022. The top sealing edge 303 and the second mating groove 2022 cooperate to further improve the stability of the housing 201 after assembly. In addition, the second engaging portion 2021 can also cover the electrode tab 301 to prevent the electrode tab 301 from being exposed and contacting external components at will.

[0074] Specifically, such as Figure 4 and Figure 8As shown, the housing 201 has two connection ports 2013, which are spaced apart along the third direction Z. The housing 201 does not have a first engaging part 2016 at the position corresponding to the connection port 2013. That is, the two connection ports 2013 divide the first engaging part 2016 into a three-segment structure. The three segments of the first engaging part 2016 are spaced apart along the third direction Z. The cover plate 202 has two second engaging parts 2021, which are arranged one-to-one with the two connection ports 2013. The second engaging part 2021 fills the gap between two adjacent first engaging parts 2016, forming a continuous and complete engaging part. The second engaging part 2021 can both limit and cover.

[0075] Furthermore, a blocking block 2023 is provided on the wall surface of the second engaging part 2021 corresponding to the second mating groove 2022. The blocking block 2023 can seal the remaining space of the connection port 2013, further improving the airtightness of the connection port 2013.

[0076] According to an embodiment of the present invention, in another aspect, a terminal device is provided, comprising: a body and the aforementioned battery assembly, the body having a compartment, and the battery assembly being disposed in the compartment and connected to the body.

[0077] Terminal devices include mobile phones, tablets, laptops, etc.

[0078] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery assembly having intersecting first direction (X) and second direction (Y), characterized in that, include: Protection board (1), mounting shell (2), and battery cell unit (3); The mounting housing (2) includes a housing (201); The housing (201) is disposed on one side of the battery cell unit (3) along the first direction (X). The housing (201) has an installation cavity (2011) inside. The housing (201) has an installation port (2012) on the side of the housing (201) away from the battery cell unit (3) along the first direction (X). The housing (201) has a connection port (2013) on the side of the housing (201) along the second direction (Y). The installation port (2012) and the connection port (2013) are both connected to the installation cavity (2011). The protective plate (1) is assembled into the mounting cavity (2011) through the mounting port (2012); The battery cell unit (3) has a tab (301) on the side near the mounting shell (2), and the tab (301) is electrically connected to the protection plate (1) through the connection port (2013).

2. The battery assembly according to claim 1, characterized in that, The battery assembly also has a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other; The housing (201) has an extension (2014) on its side along the third direction (Z), the extension (2014) communicating with the mounting cavity (2011), and the protective plate (1) has a first connecting part (101) for connecting with external components, the first connecting part (101) extending out of the mounting cavity (2011) through the extension (2014).

3. The battery assembly according to claim 2, characterized in that, The portion of the first connecting part (101) extending out of the mounting cavity (2011) includes a first connecting section and a second connecting section that are bent. The first connecting section is arranged parallel to the outer wall of the housing (201) along the third direction (Z) side, and the second connecting section is arranged parallel to the outer wall of the housing (201) along the second direction (Y) side.

4. The battery assembly according to claim 1, characterized in that, The protective plate (1) is provided with a second connecting part (102) on the side along the second direction (Y). The electrode (301) enters the mounting cavity (2011) through the connecting port (2013) and is electrically connected to the protective plate (1) through the second connecting part (102).

5. The battery assembly according to claim 4, characterized in that, The second connecting part (102) is bent to form a receiving space (1021). The electrode (301) is inserted into the receiving space (1021) and welded to one side wall of the receiving space (1021). The mounting port (2012) is connected to the connecting port (2013). The opening of the receiving space (1021) is oriented away from the battery cell (3) along the first direction (X). The electrode (301) is inserted into the receiving space (1021) through the opening.

6. The battery assembly according to claim 5, characterized in that, The tab (301) includes a first tab segment, a second tab segment and a third tab segment connected in sequence. The first tab segment extends from the cell unit (3) and extends along the first direction (X). The second tab segment is bent toward the second direction (Y). The second tab segment is located on the side of the second connection portion (102) away from the cell unit (3). The third tab segment is bent toward the receiving space (1021) and extends into the receiving space (1021).

7. The battery assembly according to any one of claims 1 to 6, characterized in that, The battery cell unit (3) includes a battery cell body and a packaging part (302) for wrapping the battery cell body. The packaging part (302) forms an assembly end (3021) at one end along the first direction (X). The assembly end (3021) is provided with a top sealing edge (303). The top sealing edge (303) extends along the first direction (X) and forms an assembly groove (304) together with the assembly end (3021). The housing (201) is disposed in the assembly groove (304). The housing (201) forms a first mating surface (2015) on one side along the second direction (Y). The first mating surface (2015) is provided with a first engaging part (2016). The first mating surface (2015) and the first engaging part (2016) surround to form a first mating groove (2017). The top sealing edge (303) is inserted into the first mating groove (2017).

8. The battery assembly according to claim 7, characterized in that, The mounting housing (2) further includes a cover plate (202), which is assembled and connected to the housing (201), and the cover plate (202) is used to block the mounting port (2012).

9. The battery assembly according to claim 8, characterized in that, The cover plate (202) is provided with a second engaging part (2021) on the side corresponding to the first mating surface (2015). The first mating surface (2015) and the second engaging part (2021) together form a second mating groove (2022). The connecting port (2013) is located on the first mating surface (2015) in the second mating groove (2022). The top sealing edge (303) is inserted into the second mating groove (2022). The electrode lug (301) extends along the first direction (X) and passes through the top sealing edge (303). At least one segment of the electrode lug (301) is located in the second mating groove (2022).

10. A terminal device, characterized in that, include: The fuselage includes a cabin; The battery assembly according to any one of claims 1 to 9 is disposed in the cabin and connected to the fuselage.

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