Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack and electric equipment. The battery pack has a length direction and a thickness direction, and comprises a battery cell, an electric connecting piece and an injection molding body. Wherein the battery cell comprises a body, a back table part and a tab part which are sequentially connected along the length direction, and the body is provided with a first surface and a second surface which are opposite to each other along the thickness direction; the electric connecting piece comprises a supporting plate, a circuit board and a reinforcing sheet which are sequentially arranged on the back table part in the thickness direction, and the tab part is electrically connected with the circuit board; the injection molding body wraps the electric connecting piece, the back table part and the tab part and is located in a space defined by the plane where the first surface is located and the plane where the second surface is located; the surface, close to the plane where the first face is located, of the injection-molded body is flush with the side face, away from the back table part, of the reinforcing piece. According to the scheme, the injection molding body is adopted for waterproofing, so that the waterproof performance is greatly improved; and the thickness of the injection molding body can be greatly reduced while the waterproof effect is ensured, so that the ultrathin design of the battery pack is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electric device. BACKGROUND

[0002] With the development of thin and light electronic devices, the battery pack providing energy is also required to be thin and light.

[0003] The battery pack mainly includes a battery cell and an electrical connector, and the electrical connector is electrically connected with the tab part of the back platform of the battery cell. Among them, the electrical connector and the battery cell need to be waterproof after being electrically connected.

[0004] The thickness of the battery cell in the prior art can be controlled to be relatively thin, and the overall thickness of the battery pack is generally affected by the waterproof structure. However, the waterproof performance of the waterproof structure in the prior art is insufficient, and the thickness is difficult to control below the requirement, which leads to the overall thickness of the battery pack not being ideal. UTILITY MODEL CONTENT

[0005] The present application provides a battery pack and an electric device to ensure the waterproof performance of the battery pack while better controlling the overall thickness of the battery pack.

[0006] In a first aspect, the present application provides a battery pack having a length direction and a thickness direction, the battery pack comprising: a battery cell comprising a body, a back platform and a tab part connected in sequence along the length direction, the body having opposite first and second faces in the thickness direction; an electrical connector comprising a support plate, a circuit board and a reinforcing sheet arranged in sequence on the back platform in the thickness direction, the tab part being electrically connected with the circuit board; and an injection body, the injection body wrapping the electrical connector, the back platform and the tab part, in the thickness direction, the injection body is in the space defined by the plane where the first face is located and the plane where the second face is located; wherein the surface of the injection body close to the plane where the first face is located is flush with the side face of the reinforcing sheet away from the back platform.

[0007] In the embodiment of the present application, the structure of the injection body is used to form the whole of the electrical connector, the back platform and the tab part, which enables the structure of the head part of the battery cell to be better sealed, greatly improving the waterproof performance compared with the scheme of sealing by using adhesive tape in the prior art; and the injection body is sealed based on the side face of the reinforcing sheet away from the back platform, which enables the surface of the injection body and the side face of the reinforcing sheet away from the back platform to jointly seal the surface of the electrical connector, while ensuring the waterproof effect, greatly reducing the thickness of the injection body, and the overall thickness of the injection body, that is, the waterproof structure, is less than the thickness of the body, which is conducive to the ultra-thin design of the battery pack and can better meet the design trend of the current thin and light electronic devices.

[0008] Wherein, in one example, the reinforcing sheet adopts a steel sheet, and the purpose of the reinforcing sheet is to support the shaped circuit board, because the circuit board currently usually adopts a FPC soft board structure, the thickness of the structure is thin, and the structure can better meet the light and thin design requirement, but the soft board is relatively soft and easy to deform, and deformation may occur in the processes such as welding, assembly, injection molding body forming, and the like, which affects the performance of the soft board, therefore, in order to guarantee the shape of the circuit board and avoid the bending deformation of the circuit board affecting the performance, the structure of the reinforcing sheet and the circuit board is designed to realize the light and thin design while guaranteeing the shaping capability.

[0009] As one of the optional embodiments of the present application, a gap is left between the peripheral edge of the reinforcing sheet and the peripheral edge of the circuit board.

[0010] In the embodiment of the present application, the injection molding body and the circuit board have a connection contact on the side parallel to the thickness direction, and the injection molding body and the circuit board also have a connection contact on the side parallel to the first surface, which increases the contact area between the injection molding body and the circuit board, thereby improving the stability of the connection between the injection molding body and the circuit board and improving the sealing performance.

[0011] As one of the optional embodiments of the present application, the tab part is connected to the side of the circuit board facing the back platform part after being bent.

[0012] As one of the optional embodiments of the present application, a notch is formed on the side of the support plate away from the body, the tab part is arranged on the side of the back platform part away from the electrical connecting piece, and the tab part is bent through the notch and welded to the circuit board.

[0013] In the embodiment of the present application, if no notch is designed on the support plate, the connection between the tab part and the circuit board needs to be bent completely over the support plate, which requires the tab part to be designed to be relatively long, and the design of the notch can provide a space for the bending of the tab part, reduce the length design of the tab part, and the bent part of the tab part only occupies the space of the notch and does not occupy additional space in the length direction, thereby being conducive to the integrated design of the battery pack.

[0014] As one of the optional embodiments of the present application, the side of the circuit board facing the support plate is provided with a clamping plate, the clamping plate has a clamping groove opening along the length direction, part of the tab part is accommodated in the clamping groove, and the tab part is electrically connected to the clamping plate.

[0015] In the embodiment of the present application, the structure design of the clamping plate and the clamping groove can realize the constraint of the tab part, in the processing process, part of the tab part is inserted into the clamping groove first to complete the preliminary connection between the tab part and the clamping plate, at this time, the clamping plate has better regular constraint on the tab part, and then the clamping plate is welded and fixed on the circuit board, thereby greatly improving the convenience of processing, and avoiding the phenomenon that the bent and dispersed tab part contacts the components of the circuit board to cause short circuit and the like.

[0016] As one of the optional embodiments of the present application, the clamping plate comprises a top plate, a connecting plate and a bottom plate arranged in sequence along the thickness direction, the top plate is welded to the circuit board, the connecting plate is connected between the top plate and the bottom plate for the connection of the two, the connecting plate is arranged on the side of the top plate close to the body, the tab part is clamped between the top plate (41) and the bottom plate, and the tab part is connected to the circuit board through the clamping plate.

[0017] As one of the optional embodiments of the present application, a foolproof slot hole is formed on the top plate.

[0018] In the embodiments of the present application, the specific structure of the clamping plate is disclosed, the foolproof slot hole on the top plate ensures the connection accuracy of the tab part and the tab part during the processing process, and ensures the accuracy of the welding connection of the clamping plate to the circuit board.

[0019] As one of the optional embodiments of the present application, the shell further comprises a housing, the battery cell, the electrical connecting piece and the injection body are arranged in the housing, wherein the shell is provided with a through hole, part of the circuit board is arranged outside the housing through the through hole.

[0020] As one of the optional embodiments of the present application, the shell comprises a cladding piece and a closing piece, the cladding piece comprises a base part attached to the second surface, a frame part arranged on the side of the base part, and a folding part arranged on the side of the frame part away from the base part; wherein the folding part is attached to the first surface, the folding parts are combined to form an open mouth, the closing piece is arranged on the side of the folding part away from the base part to close the open mouth, and the through hole is formed on the frame part.

[0021] In the embodiments of the present application, a specific structure of the shell is disclosed, after the injection of the injection body is completed, the battery cell and the electrical connecting piece are placed on the base part as a whole, then the frame part and the folding part are folded, and finally the closing piece is attached to the folding part to complete the assembly of the shell. Since part of the circuit board needs to be arranged outside the housing, the shell structure can be assembled more conveniently after the injection of the injection body is completed, and the processing convenience is improved.

[0022] On the other hand, the present application provides a kind of electric equipment, it includes the battery pack described above.

[0023] One of the above technical solutions has the following advantages or beneficial effects:

[0024] In the embodiment of the present application, the structure of the injection molding body is adopted to form the whole of the electrical connecting piece, the back platform part and the tab part, which can better seal the structure of the head of the battery cell, greatly improving the waterproof performance compared with the scheme of sealing by using adhesive paper in the prior art; and the injection molding body is sealed based on the side surface of the reinforcing sheet away from the back platform part, which can seal the surface of the electrical connecting piece by the cooperation of the surface of the injection molding body and the side surface of the reinforcing sheet away from the back platform part, greatly reducing the thickness of the injection molding body, and the overall thickness of the injection molding body, i.e. the waterproof structure, is smaller than the thickness of the body, which is beneficial to the ultra-thin design of the battery pack and can better meet the design trend of the light and thin electronic equipment. BRIEF DESCRIPTION OF DRAWINGS

[0025] The technical scheme and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.

[0026] Figure 1 is the overall structure diagram of the battery pack provided by the embodiment of the present application;

[0027] Figure 2 is the exploded structure diagram for indicating the shell structure provided by the embodiment of the present application;

[0028] Figure 3 is the overall exploded structure diagram of the battery pack provided by the embodiment of the present application;

[0029] Figure 4 is the cross-sectional view of the battery pack along the section passing through the tab part provided by the embodiment of the present application;

[0030] Figure 5 is the exploded structure diagram for indicating the structure of the electrical connecting piece provided by the embodiment of the present application;

[0031] Figure 6 is the cross-sectional view for indicating the structure of the clamping plate provided by the embodiment of the present application.

[0032] Reference signs: 1, battery cell; 11, body; 110, first surface; 1100, second surface; 12, back platform part; 13, tab part;

[0033] 2, electrical connecting piece; 21, support plate; 210, notch; 22, circuit board; 221, component; 222, connector; 23, reinforcing sheet;

[0034] 3, injection molding body;

[0035] 4, clamping plate; 40, clamping groove; 41, top plate; 410, fool-proof slot hole; 42, connecting plate; 43, bottom plate;

[0036] 5, housing; 50, through hole; 500, accommodating cavity; 51, covering member; 511, base portion; 512, frame portion; 513, folding portion; 510, opening; 52, closing member;

[0037] X, length direction; Z, thickness direction. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects, unless otherwise specified.

[0040] The following will be described in detail with reference to the drawings in the embodiments of the present application. Figures 1-6 The present application will be further described.

[0041] Reference will be made to Figures 1-3 A battery pack provided by the present application has a length direction X and a thickness direction Z. The battery pack comprises a battery cell 1, an electrical connecting member 2 arranged at one end of the battery cell 1 in the length direction X, and an injection body 3 arranged at the end of the battery cell 1 for wrapping the electrical connecting member 2 and part of the battery cell 1, the injection body 3 plays a waterproof role. It also includes a housing 5, the housing 5 has an accommodating cavity 500 inside, the battery cell 1 and the electrical connecting member 2 are accommodated in the accommodating cavity 500, wherein the housing 5 is provided with a through hole 50, part of the electrical connecting member 2 extends out of the through hole 50. Since the waterproof structure of the injection body 3 is used to wrap the electrical connecting member 2 and the end of the battery cell 1 in the present application, the sealing effect is good.

[0042] Reference will be made to Figure 2 And Figure 3 The battery cell 1 comprises a body 11, a back platform 12 and a tab portion 13 connected in sequence along the length direction X, wherein the body 11 has opposite first and second faces 110 and 1100 along the thickness direction Z.

[0043] Reference will be made to Figure 2As an optional embodiment of the present application, the shell 5 comprises a cover 51 and a closure 52, and the cover 51 and the closure 52 jointly form a receiving cavity 500. Specifically, the cover 51 comprises a base portion 511 attached to the second surface 1100, a frame portion 512 arranged on the side of the base portion 511, and a folding portion 513 arranged on the side of the frame portion 512 away from the base portion 511; the folding portion 513 is attached to the first surface 110, and the folding portions 513 jointly form an opening 510; the closure 52 is arranged on the side of the folding portion 513 away from the base portion 511 to close the opening 510; and one end of the frame portion 512 in the length direction X is provided with the through hole 50.

[0044] In the embodiment of the present application, a specific structure of the shell 5 is disclosed. After the injection molding of the injection body 3 is completed, the battery cell 1 and the electrical connecting member 2 are placed on the base portion 511 as a whole, and then the frame portion 512 and the folding portion 513 are folded, and finally the closure 52 is attached to the folding portion 513 to complete the assembly of the shell 5. Since part of the circuit board 22 needs to protrude out of the receiving cavity 500, the shell 5 structure can be conveniently assembled after the injection molding of the injection body 3 is completed, thereby improving the convenience of processing.

[0045] Referring to Figures 3-6 The electrical connecting member 2 comprises a support plate 21, a circuit board 22, and a reinforcing sheet 23 arranged on the back surface portion 12 in the thickness direction Z in sequence, the circuit board 22 is arranged in a spaced manner with the support plate 21, the side surface of the circuit board 22 facing the support plate 21 is provided with components 221, and the tab portion 13 is electrically connected with the circuit board 22. It should be noted that the tab portion 13 is provided with two, which are the positive and negative electrodes, and are welded with the corresponding areas on the side surface of the circuit board 22 close to the support plate 21. Part of the circuit board 22 protrudes out of the through hole 50, and the end portion of the circuit board 22 is provided with a connector 222.

[0046] In one example, the reinforcing sheet 23 is made of steel sheet. The purpose of the reinforcing sheet 23 is to support the shaped circuit board 22. At present, the circuit board 22 usually adopts the structure of FPC soft board, which has a relatively thin thickness and can better meet the design requirements of lightness and thinness. However, the soft board is relatively soft and easy to deform, and may be deformed during the processes of welding, assembly, and forming of the injection body 3, which may affect its performance. Therefore, in order to ensure the shape of the circuit board 22 and avoid the bending deformation of the circuit board 22 affecting the performance, the reinforcing sheet 23 is designed to add the structure of the FPC circuit board 22 to realize the design of lightness and thinness while ensuring the shaping ability. The support plate 21 can be made of a certain strength of adhesive paper, such as PET material.

[0047] For the injection body 3, the injection body 3 wraps the outside of the electrical connecting piece 2, the back platform 12 and the tab portion 13. In the thickness direction Z, the reinforcing sheet 23 is located on the side of the plane where the first surface 110 is close to the plane where the second surface 1100 is, and the injection body 3 is in the space defined by the plane where the first surface 110 is and the plane where the second surface 1100 is; wherein the surface of the injection body 3 close to the plane where the first surface 110 is flush with the side of the reinforcing sheet 23 away from the back platform 12.

[0048] It can be understood that the plane where the first surface 110 is refers to the entire plane coinciding with the first surface 110, and the plane where the second surface 1100 is refers to the entire plane coinciding with the second surface 1100.

[0049] In the embodiment of the present application, the structure of the injection body 3 is adopted to form the whole of the electrical connecting piece 2, the back platform 12 and the tab portion 13, which makes the structure of the head of the battery cell 1 be better sealed, greatly improves the waterproof performance compared with the scheme of sealing by using adhesive paper in the prior art; and the injection body 3 is sealed based on the side of the reinforcing sheet 23 away from the back platform 12, which makes the surface of the injection body 3 and the side of the reinforcing sheet 23 away from the back platform 12 cooperate to seal the surface of the electrical connecting piece 2, which can greatly reduce the thickness of the injection body 3 while ensuring the waterproof effect, and the overall thickness of the injection body 3, i.e. the overall thickness of the waterproof structure, is less than the thickness of the body 11, which is beneficial to the ultra-thin design of the battery pack and can better meet the design trend of the current electronic equipment light and thin.

[0050] It should be noted that the description of the injection body 3 wrapping the whole structure formed by the electrical connecting piece 2, the back platform 12 and the tab portion 13 does not mean that all parts of the above-mentioned components are wrapped in the injection body 3, but mainly the parts of the electrical connecting piece 2, the back platform 12 and the tab portion 13 exposed to the outside and easily affected by water vapor are wrapped, which can play a waterproof and protective role. For example, in the embodiment of the present application, the injection body 3 wraps the support plate 21, the component 221 in the electrical connecting piece 2, and the tab portion 13 and the back platform of the battery cell 1, and the reinforcing sheet 23 in the electrical connecting piece 2 is exposed to the top surface, and the circuit board 22 in the battery cell 1 is partially exposed.

[0051] In order to control the overall thickness of the battery pack, a specific numerical design scheme is given in the embodiment of the present application, and the thickness size of each layer of structure is limited. Referring to Figure 4The overall thickness occupied by the shell 5 is the thickness of the base portion 511, the folded portion 513 and the closure 52, which are all 0.06 mm in the embodiment, i.e. the thickness occupied by the shell 5 is 0.18 mm. The thickness of the battery cell 1 can be 2 mm at the current process level, i.e. the thickness of the body 11 is 2 mm in the embodiment, and the thickness of the entire battery pack is 2.18 mm.

[0052] To control the thickness of the waterproof structure of the battery head, the distance between the upper surface of the back platform portion 12 and the second face 110, i.e. the height of the back platform portion 12, is designed to be 0.7 mm, and the overall thickness of the electrical connector 2 is 1.15 mm, which is specifically allocated as 0.06 mm for the thickness of the support plate 21 and 1.09 mm for the overall thickness of the circuit board 22 and the reinforcing sheet 23. In this way, there is a spacing between the upper surface of the injection body 3 and the bottom surface of the folded portion 513, and the thickness of the waterproof structure does not exceed the thickness of the body 11, and the design meets the requirements.

[0053] Referring to Figure 4 As one of the optional embodiments of the present application, a spacing is left between the peripheral edge of the reinforcing sheet 23 and the peripheral edge of the circuit board 22. It can be understood that the reinforcing sheet 23 is within the coverage range of the circuit board 22, and the orthographic projection of the reinforcing sheet 23 on the plane of the first face 110 is within the orthographic projection range of the circuit board 22 on the plane of the first face 110.

[0054] In the embodiment, the side surface of the injection body 3 and the circuit board 22 parallel to the thickness direction Z has a connecting contact, and the side surface of the injection body 3 and the circuit board 22 close to the plane of the first face 110 also has a connecting contact, thereby increasing the contact area between the injection body 3 and the circuit board 22, and improving the stability of the connection between the injection body 3 and the circuit board 22 and the sealing performance.

[0055] Referring to Figure 3 As one of the optional embodiments of the present application, the tab portion 13 is connected to the side of the circuit board 22 facing the back platform portion 12 after being bent. In one example, a notch 210 is formed on the side of the support plate 21 away from the body 11, the tab portion 13 is arranged on the side of the back platform portion 12 away from the electrical connector 2, and the tab portion 13 is bent through the notch 210 and electrically connected to the circuit board 22. Alternatively, the tab portion 13 can be directly welded to the circuit board 22.

[0056] In the embodiment of the present application, if the support plate 21 is not designed with the notch 210, the tab portion 13 needs to completely pass through the support plate 21 and then be bent to be connected with the circuit board 22, which requires the tab portion 13 to be designed to be relatively long. The design of the notch 210 can provide a space for the bending of the tab portion 13, reduce the length design of the tab portion 13, and the part of the tab portion 13 bent only occupies the space of the notch 210 and does not occupy additional space in the length direction X, thereby facilitating the integrated design of the battery pack.

[0057] With reference to Figure 3 , Figure 4 and Figure 6 , as one of the optional embodiments of the present application, the circuit board 22 is welded and fixed with a clamping plate 4 on the side facing the support plate 21. The clamping plate 4 has a clamping groove 40 which is open along the length direction X, and part of the tab portion 13 is accommodated in the clamping groove 40. The tab portion 13 is electrically connected with the clamping plate 4. It can be understood that in the embodiment of the present application, the tab portion 13 forms an electrical connection conduction between the clamping plate 4 and the circuit board 22.

[0058] Specifically, the clamping plate 4 includes a top plate 41, a connecting plate 42 and a bottom plate 43 which are sequentially arranged along the thickness direction Z. The top plate 41 is welded and connected with the circuit board 22. The connecting plate 42 is connected between the top plate 41 and the bottom plate 43 for the connection of the two. The connecting plate 42 is arranged on the side of the top plate 41 close to the body 11.

[0059] In the embodiment of the present application, the structure design of the clamping plate 4 and the clamping groove 40 can realize the constraint of the tab portion 13. In the processing process, part of the tab portion 13 is first inserted into the clamping groove 40 to complete the preliminary connection of the tab portion 13 and the clamping plate 4. At this time, the clamping plate 4 has better regularity and constraint on the tab portion 13. Then the clamping plate 4 is welded and fixed on the circuit board 22, thereby greatly improving the convenience of processing, and avoiding the phenomenon that the bent and scattered tab portion 13 contacts the components 221 of the circuit board 22 to cause short circuit and the like.

[0060] As one of the optional embodiments of the present application, the top plate 41 is provided with anti-fooling groove holes 410. Specifically, the anti-fooling groove holes 410 are provided with three, which are respectively arranged at the edge positions of the other three sides of the top plate 41 except the side of the connecting plate 42. The anti-fooling groove holes 410 are semicircular. In the embodiment of the present application, the specific structure of the clamping plate 4 is disclosed. The arrangement of the anti-fooling groove holes 410 on the top plate 41 ensures the connection accuracy of the tab portion 13 and the tab portion 13 in the processing process, and ensures the accuracy of the welding connection of the clamping plate 4 and the circuit board 22.

[0061] On the other hand, the present application provides a kind of electric equipment, it includes above-mentioned battery pack.

[0062] The above merely describes some embodiments of the present application, and does not limit the present application in any form. The protection scope of the present application is not limited to this, and any person skilled in the art can easily think of simple modifications, equivalent changes and modifications within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A battery pack, characterized by, The battery pack has a length direction (X) and a thickness direction (Z), and comprises: an electric core (1) comprising a body (11), a back platform (12) and a tab portion (13) connected in sequence along the length direction (X), the body (11) having opposite first and second faces (110, 1100) along the thickness direction (Z); an electric connector (2) comprising a support plate (21), a circuit board (22) and a reinforcing sheet (23) arranged in sequence on the back platform (12) along the thickness direction (Z), the tab portion (13) being electrically connected to the circuit board (22); and an injection body (3) wrapping the electric connector (2), the back platform (12) and the tab portion (13), the injection body (3) being located within a space defined by the planes of the first and second faces (110, 1100) along the thickness direction (Z); wherein a surface of the injection body (3) close to the plane of the first face (110) is flush with a side of the reinforcing sheet (23) facing away from the back platform (12).

2. The battery pack of claim 1, wherein, A distance is left between the peripheral edge of the reinforcing sheet (23) and the peripheral edge of the circuit board (22).

3. The battery pack of claim 1, wherein, The tab portion (13) is connected to a side of the circuit board (22) facing the back platform (12) after being bent.

4. The battery pack of claim 3, wherein, A notch (210) is formed on a side of the support plate (21) facing away from the body (11), the tab portion (13) is arranged on a side of the back platform (12) facing away from the electric connector (2), and the tab portion (13) is bent via the notch (210) and welded to the circuit board (22).

5. The battery pack of claim 3, wherein, A clamping plate (4) is arranged on a side of the circuit board (22) facing the support plate (21), the clamping plate (4) has a clamping groove (40) open along the length direction (X), part of the tab portion (13) is accommodated in the clamping groove (40), and the tab portion (13) is electrically connected to the clamping plate (4).

6. The battery pack of claim 5, wherein, The clamping plate (4) comprises a top plate (41), a connecting plate (42) and a bottom plate (43) arranged in sequence along the thickness direction (Z), the top plate (41) is welded to the circuit board (22), the connecting plate (42) is connected between the top plate (41) and the bottom plate (43) for connecting the two, the connecting plate (42) is arranged on a side of the top plate (41) close to the body (11), the tab portion (13) is clamped between the top plate (41) and the bottom plate (43), and the tab portion (13) is connected to the circuit board (22) via the clamping plate (4).

7. The battery pack of claim 6, wherein, A foolproof slot hole (410) is formed on the top plate (41).

8. The battery pack of claim 1, wherein, An outer shell (5) is further provided, having a receiving cavity (500) in which the electric core (1), the electric connector (2) and the injection body (3) are arranged, wherein the outer shell (5) is provided with a through opening (50), part of the circuit board (22) extends out of the through opening (50) and is arranged outside the receiving cavity (500).

9. The battery pack of claim 8, wherein, The shell (5) comprises a cover (51) and a closure (52), the cover (51) comprises a base part (511) attached to the second face (1100), a frame part (512) arranged on the periphery of the base part (511), and a folding part (513) arranged on the side of the frame part (512) away from the base part (511); Wherein, the folding part (513) is attached to the first face (110), the folding parts (513) form an opening (510) between them, the closure (52) is arranged on the side of the folding part (513) away from the base part (511) to close the opening (510), and the frame part (512) is provided with the through hole (50).

10. An electric device, characterized by Comprise: The battery pack of any one of claims 1-9.

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