Battery and method for manufacturing battery

Abstract

The invention provides a battery. The battery comprises a fixed frame, a battery cell assembly, an injection molding packaging body and an elastic sheet, a containing cavity is formed in the fixing frame. The battery cell assembly is located in the containing cavity, and a forming gap is formed between the battery cell assembly and the containing cavity. The injection molding packaging body is filled in the forming gap, protrudes out of the battery cell and is exposed out of one side of the fixing frame, so that the injection molding packaging body and the battery cell jointly form an expansion groove. The elastic sheet covers the expansion groove to form an expansion space together, and the periphery of the elastic sheet abuts against the injection molding packaging body. The elastic sheet and the injection molding packaging body jointly form a closed expansion space, that is, the expansion space is built in the battery, so that the expansion space does not need to be reserved during product design, and the development of the product towards the miniaturization direction is facilitated.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a battery and a method for manufacturing the battery. Background Technology

[0002] Currently, replaceable battery designs are increasingly being adopted in small consumer electronics products. Common structural forms include external plastic casing or low-temperature injection molding processes.

[0003] However, low-temperature injection-molded batteries are prone to thermal expansion during charging and discharging. To avoid deformation of the casing or damage to the overall structure due to volume changes caused by thermal expansion, expansion gaps must be pre-planned in the overall design, and cushioning materials such as foam must be added to cope with this, which limits the development of miniaturization of the product. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a battery and a method for manufacturing the battery that do not require reserved expansion space in the product.

[0005] The objective of this application is achieved through the following technical solution: A battery comprising: A fixing frame having a receiving cavity; A battery cell assembly, the battery cell assembly including a battery cell, the battery cell being located within the receiving cavity, and a molding gap being formed between the battery cell and the fixing frame; The injection molded package fills the molding gap and protrudes from the battery cell, exposing one side of the fixing frame, so that the injection molded package and the battery cell together form an expansion groove. An elastic sheet is provided on the expansion groove to form an expansion space, and the periphery of the elastic sheet abuts against the injection-molded package.

[0006] In one embodiment, the injection-molded package is flush with the opening of the receiving cavity.

[0007] In one embodiment, the receiving cavity extends through the fixing frame; and / or, The fixing frame is a plastic frame.

[0008] In one embodiment, limiting protrusions are provided on both sides of the fixing frame, the limiting protrusions abut against the side of the battery cell, and the limiting protrusions are connected to the injection-molded package.

[0009] In one embodiment, the battery further includes a tag that is attached around the outer surface of the fixing frame, and the tag is also attached to the portion of the injection-molded package exposed by the fixing frame, the outer surface of the elastic sheet, and the portion of the battery cell exposed by the injection-molded package.

[0010] In one embodiment, one end of the fixing frame has a through hole communicating with the receiving cavity; the battery cell assembly also includes a battery protection board, which is disposed inside the receiving cavity, the tabs of the battery cell are electrically connected to the power receiving end of the battery protection board, the output terminal of the battery protection board is located at the through hole, and the injection molded package is also connected to the battery protection board.

[0011] In one embodiment, the tabs of the battery cell abut against the power terminals of the battery protection board.

[0012] In one embodiment, the inner wall of the receiving cavity is provided with a support boss, which is used to abut against the end of the battery cell away from the battery protection plate. The support boss is disposed opposite to the battery protection plate, and a cavity is formed between the support boss and the inner wall of the receiving cavity. A portion of the injection-molded package is located in the cavity.

[0013] In one embodiment, a fixing post is formed on the inner wall of the receiving cavity, and a fixing hole is opened on the battery protection plate corresponding to the fixing post. The fixing post is located in the fixing hole, and the injection molded package is connected to the fixing post.

[0014] In one embodiment, the tabs of the battery cell are formed with bending grooves, and a portion of the injection-molded package is formed within the bending grooves.

[0015] In one embodiment, the outer periphery of the fixing frame is formed with a foolproof locking position, and the inner wall of the receiving cavity is formed with a protrusion corresponding to the foolproof locking position.

[0016] In one embodiment, the injection-molded package has an assembly step formed along the periphery of the expansion groove, and the elastic sheet abuts against the assembly step to cover the expansion groove.

[0017] A method for manufacturing a battery, used to manufacture the battery described in any of the above embodiments, the method comprising: The battery cell assembly is assembled inside the housing cavity; The molding gap is filled with glue to form an injection-molded package. The elastic sheet is placed over the expansion groove.

[0018] Compared with the prior art, this application has at least the following advantages: In the aforementioned battery, the injection-molded package fills the molding gap and protrudes from the battery cell, exposing one side of the fixing frame. This allows the injection-molded package and the battery cell to jointly form an expansion groove. An elastic sheet is placed in the expansion groove, meaning the opening of the expansion groove is sealed by the elastic sheet, making the outer surface of the battery a complete plane. Furthermore, the elastic sheet and the injection-molded package together form a closed expansion space, meaning the expansion space is built into the inside of the battery. This eliminates the need to reserve expansion space for the battery during product design, which is beneficial for the miniaturization of the product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a battery according to one embodiment; Figure 2 for Figure 1 A cross-sectional view of the battery shown; Figure 3 for Figure 2 A partial enlarged view of section A shown in the sectional view; Figure 4 for Figure 1 The diagram shows the structure of the battery in another state. Figure 5 for Figure 4 A magnified view of part B in the schematic diagram of the structure shown; Figure 6 for Figure 1 The diagram shows the structure of the battery in another state. Figure 7 for Figure 1 A schematic diagram of the battery mounting frame shown; Figure 8 for Figure 1 A schematic diagram of the battery's mounting frame from another perspective; Figure 9 This is a schematic flowchart of a battery manufacturing method according to one embodiment. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments: Please see Figures 1 to 8 The battery 10, as described in one embodiment of the present invention, includes a fixing frame 100, a cell assembly 200, an injection-molded package 300, and an elastic sheet 400. The fixing frame 100 forms a receiving cavity 101. The cell assembly 200 includes a cell 210 located within the receiving cavity 101, and a molding gap 102 is formed between the cell 210 and the fixing frame 100. The injection-molded package 300 fills the molding gap 102, protruding from the cell 210 and exposed on one side of the fixing frame 100, such that the injection-molded package 300 and the cell 210 together form an expansion groove 301. The elastic sheet 400 covers the expansion groove 301 to jointly form an expansion space 302, and the periphery of the elastic sheet 400 abuts against the injection-molded package 300.

[0025] In this embodiment, the injection-molded package 300 fills the molding gap 102 and protrudes from the battery cell 210, exposing one side of the fixing frame 100. The injection-molded package 300 and the battery cell 210 together form an expansion groove 301. An elastic sheet 400 covers the expansion groove 301, meaning the opening of the expansion groove 301 is sealed by the elastic sheet 400, thus forming a complete plane on the outer surface of the battery 10. Furthermore, the elastic sheet 400 and the injection-molded package 300 together form a closed expansion space 302, meaning the expansion space 302 is built into the interior of the battery 10. This eliminates the need to reserve an expansion space 302 for the battery 10 during product design, which is beneficial for product miniaturization.

[0026] like Figures 2 to 4As shown, in one embodiment, the injection-molded package 300 is flush with the opening of the receiving cavity 101, forming a continuous plane between the injection-molded package 300 and the outer surface of the fixing frame 100. This eliminates protruding structures and improves space utilization. It also reduces the volume of the battery 10, meeting the demands of product miniaturization. Furthermore, the injection-molded package 300 penetrates the receiving cavity 101 to form a seamless protective barrier, preventing dust and moisture from penetrating along the cavity and evenly distributing external stress, thus improving the reliability and installability of the battery 10.

[0027] like Figure 2 , Figure 7 As shown in the figure, in one embodiment, the receiving cavity 101 extends through the fixing frame 100, facilitating the manufacturing and shaping of the fixing frame 100. It can be understood that in other embodiments, the receiving cavity 101 may not extend through the fixing frame 100, that is, the receiving cavity 101 may be formed on one side of the fixing frame 100.

[0028] Specifically, in one embodiment, the fixing frame 100 is a plastic frame, making it lightweight and easy to mold. In other embodiments, the fixing frame 100 may also be a sintered ceramic body or a molded composite material.

[0029] Furthermore, the injection-molded package 300 includes two exposed portions 310 respectively exposed on both sides of the fixing frame 100. Each exposed portion 310 includes two curved surfaces 311 and a flat surface 312 connecting the two curved surfaces 311. At least one flat surface 312 has an expansion groove 301 formed therein, and a portion of the battery cell 210 is exposed in the expansion groove 301. It can be understood that the receiving cavity 101 of the fixing frame 100 extends through the entire fixing frame 100, and the opening of the receiving cavity 101 is larger than the plane of the fixing frame 100, increasing the operating area and facilitating the installation of the battery cell 210 and the battery protection board 220. At the same time, the injection-molded package 300 is connected to the periphery of the opening of the receiving cavity 101 through the curved surfaces 311, avoiding stress concentration and extending the service life of the battery 10. In this embodiment, one of the flat surfaces 312 has an expansion groove 301 formed therein. In other embodiments, both flat surfaces 312 of the exposed portions 310 have expansion grooves 301 formed therein.

[0030] like Figure 7 and Figure 8As shown, in one embodiment, multiple limiting protrusions 110 are provided on both sides of the fixing frame 100. The limiting protrusions 110 abut against the side of the battery cell 210 and are connected to the injection-molded package 300, making the injection-molded package 300 more firmly connected to the fixing frame. It can be understood that the limiting protrusions 110 on both sides of the fixing frame 100 support the battery cell 210 on both sides respectively, positioning and supporting the battery cell 210 before injection molding to prevent the battery cell 210 from shifting; during the injection molding process, it ensures that the thickness of the injection-molded package 300 between the battery cell 210 and the fixing frame 100 is uniform, improving structural reliability; after injection molding, the limiting protrusions 110 and the injection-molded package 300 form a mechanical interlocking structure, enhancing the overall bonding strength and impact resistance.

[0031] like Figure 4 As shown, further, in this embodiment, a portion of the injection-molded package 300 is located between the battery cell 210 and the limiting protrusion 110, preventing direct contact between the battery cell 210 and the limiting protrusion 110, and providing a buffering effect to prevent damage to the battery cell 210 due to vibration or compression during assembly, use, or transportation, thereby improving the safety of the battery 10. Simultaneously, a groove corresponding to the limiting protrusion 110 is formed on the side of the injection-molded package 300 facing the limiting protrusion 110, enhancing the bonding strength between the injection-molded package 300 and the fixing frame 100, and preventing the injection-molded package 300 from detaching. Furthermore, a protrusion gap 111 is formed between two adjacent limiting protrusions 110, and a portion of the injection-molded package 300 is formed in the protrusion gap 111, increasing the contact area between the injection-molded package 300 and the fixing frame 100, thereby increasing the bonding strength between the injection-molded package 300 and the fixing frame 100, and preventing the injection-molded package 300 from detaching from the fixing frame 100.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, the battery 10 further includes a label 500, which is attached around the outer surface of the fixing frame 100. The label 500 is also attached to the portion of the injection-molded package 300 exposed to the fixing frame 100, the outer surface of the elastic sheet 400, and the portion of the battery cell 210 exposed to the injection-molded package 300, so that the elastic sheet 400 is better fixed to the injection-molded package 300 and provides better protection.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, in one embodiment, one end of the fixing frame 100 has a through hole 1011 communicating with the receiving cavity 101. The cell assembly 200 also includes a battery protection board 220, which is disposed inside the receiving cavity 101. The tabs 211 of the cell 210 are electrically connected to the power terminals of the battery protection board 220, and the output terminals 221 of the battery protection board 220 are located at the through hole 1101. By setting the battery protection board 220, multiple safety protections such as overcharge, over-discharge, overcurrent, and short circuit are achieved, improving safety and reliability and extending the life of the battery 10.

[0034] like Figure 6 As shown, in one embodiment, the tab 211 of the cell 210 abuts against the power terminal of the battery protection board 220.

[0035] like Figure 6 As shown, in one embodiment, the tab 211 of the battery cell 210 is formed with a bending groove 2111, and the injection molded package 300 is formed in the bending groove 201.

[0036] Understandably, bending the tab 211 of the cell 210 reduces the space occupied in the overall height direction, making the battery 10 structure more compact and facilitating product miniaturization. Simultaneously, the injection-molded package 300 integrates the tab 211 and the circuit board into a single unit, reducing relative displacement and improving the stability of the battery 10. Furthermore, the injection-molded package 300 completely encapsulates the tab 211 and solder joints of the cell 210, isolating the tab 211 from external components and preventing short circuits.

[0037] Furthermore, such as Figure 6 As shown, in this embodiment, the bent tab 211 is located between the cell 210 and the battery protection board 220, and the openings of two adjacent bending grooves 2111 face different directions. The injection-molded package 300 wraps around the tab 211 and fills the bending groove 2111, which buffers the movement of the cell 210, thereby preventing the tab 211 from deforming and avoiding damage to the cell, thus improving the safety of the battery. At the same time, it improves the reliability of the connection between the injection-molded package 300 and the tab 211 and the fixing frame 100, respectively, and avoids the situation where the injection-molded package 300 separates from the tab 211 or the fixing frame 100.

[0038] like Figure 7As shown, in one embodiment, a fixing post 120 is formed on the inner wall of the receiving cavity 101. The battery protection plate 220 has a fixing hole 222 corresponding to the fixing post 120. The fixing post 120 is located in the fixing hole 222, and the injection-molded package 300 is connected to the fixing post 120. Specifically, in this embodiment, there are two fixing posts 120 and two fixing holes 222. The two fixing posts 120 are located on the inner wall of the receiving cavity 101, and the two fixing posts 120 are not on the same horizontal line. Through the staggered cooperation of the two fixing posts 120, the rotation and displacement of the battery protection plate 220 during assembly can be restricted, ensuring its accurate and fixed position. At the same time, the injection-molded package 300 is connected to the fixing post 120, which improves the stability and vibration resistance of the battery 10 and avoids the risk of loosening or short circuit of the connection lines due to displacement.

[0039] like Figures 6 to 8 As shown, in one embodiment, the inner wall of the receiving cavity 101 is provided with a support boss 130, which abuts against the end of the battery cell 210 facing away from the battery protection plate 220, and the support boss 130 is disposed opposite to the battery protection plate 220. In this embodiment, two support bosses 130 are formed on the inner wall of the end of the fixing frame 100, and the two support bosses 130 provide support for the battery cell 210 to prevent the battery cell 210 from shifting.

[0040] Furthermore, such as Figures 6 to 8 As shown, in this embodiment, a cavity 1301 is formed between the supporting boss 130 and the inner wall of the receiving cavity 101. A portion of the injection-molded package 300 is formed within the cavity 1301, meaning that a portion of the injection-molded package 300 is embedded in the cavities 1301 on both sides of the supporting boss 130. This enhances the bonding strength between the injection-molded package 300 and the fixing frame 100, further preventing the injection-molded package 300 from detaching from the fixing frame. Furthermore, a portion of the injection-molded package 300 is also formed at the contact point between the battery cell and the supporting boss 130, making the contact point between the battery cell and the supporting boss 130 even more secure.

[0041] like Figure 1 and Figure 7 As shown, in one embodiment, a foolproof locking position 140 is formed on the outer periphery of the fixing frame 100, and a protrusion 150 is formed on the inner wall of the receiving cavity 101 corresponding to the foolproof locking position 140. The foolproof locking position 140 has a groove structure. By forming a protrusion 150 on the inner wall of the receiving cavity 101 through the foolproof locking position 140, the battery protection plate 220 is restricted to be installed into the end cap 110 in only one direction, avoiding reverse, misaligned, or tilted assembly, thereby improving assembly accuracy, efficiency, and operational safety. At the same time, the foolproof locking position 140 on the outer periphery of the fixing frame 100 can restrict the direction in which the battery 10 is installed into the product, simplifying the installation of the battery 10 and improving assembly accuracy, efficiency, and operational safety.

[0042] like Figures 3 to 5 As shown, in one embodiment, the injection-molded package 300 has an assembly step 3011 formed along the periphery of the expansion groove 301, and the elastic sheet 400 is disposed within the assembly step to cover the expansion groove 301. In this embodiment, the contour of the assembly step 3011 conforms to the contour of the elastic sheet 400, and the height of the assembly step 3011 is the same as the thickness of the elastic sheet 400. The recessed assembly step 3011 formed around the periphery of the expansion groove 301 provides positioning and restraint for the elastic sheet 400; at the same time, the outer surface of the battery remains flat after the elastic sheet 400 is covered, balancing sealing strength and space saving, and improving the energy density and structural reliability of the battery 10.

[0043] Please see Figure 9 This disclosure also provides a method for manufacturing a battery 10, used to manufacture the battery 10 described in any of the above embodiments. See also... Figures 1 to 6 In one embodiment, the manufacturing method includes some or all of the following steps: S100: Assemble the battery cell assembly 200 into the receiving cavity 101; S200: Perform a glue injection operation on the molding gap 102 to form an injection molded package 300; S300: The elastic sheet 400 is placed over the expansion groove 301.

[0044] The above manufacturing method involves first injecting glue into the molding gap 102 between the cell assembly 200 and the inner wall of the fixed frame to form an injection molded package 300 and an expansion groove 301, and then covering the expansion groove 301 with an elastic sheet 400 to encapsulate the battery 10. The expansion space 302 is built into the battery, so there is no need to reserve expansion space in the product design, which is conducive to the development of the product towards miniaturization.

[0045] In one embodiment, step S100 of assembling the battery cell assembly 200 within the receiving cavity 101 includes some or all of the following steps: First, the battery cell 200 and the battery protection board 220 are welded together to obtain the battery cell assembly 200. Next, the battery protection board 220 is assembled and fixed inside the receiving cavity 101; Next, the tabs 211 of the battery cell 210 are bent. Finally, the battery cell 210 is assembled into the receiving cavity 101.

[0046] It is understood that, in this embodiment, step S100 of assembling the battery cell assembly 200 into the receiving cavity 101 specifically involves: first, welding the battery cell 200 to the battery protection board 220 to obtain the battery cell assembly 200; then, assembling and fixing the battery protection board 220 into the receiving cavity 101; subsequently, bending the tab 211 of the battery cell 210; and finally, assembling the battery cell 210 into the receiving cavity 101. Completing the welding of the battery cell 200 and the battery protection board 220 in an open area first reduces operational difficulty, improves welding quality, and ensures the stability of the electrical connection between the battery cell 200 and the battery protection board 220. Simultaneously, assembling the resulting battery cell assembly 200 as a whole simplifies subsequent assembly steps. Furthermore, fixing the battery protection board 600 before placing the battery cell 210 in avoids damage to the battery cell 300 during the fixing process of the battery protection board 600, and also facilitates subsequent bending operations on the tab 211.

[0047] Specifically, in this embodiment, in the step of welding the battery cell 200 and the battery protection board 220 to obtain the battery cell assembly 200, laser welding technology is used to complete the welding operation between the battery cell 210 and the battery protection board 220, avoiding mechanical stress damage to the battery cell 210; at the same time, laser welding has concentrated energy and heat-affected zone effect, which can maximize the protection of the performance of the battery cell 210. Furthermore, laser welding has high efficiency and good welding quality, which can improve the mechanical strength and reliability of the connection between the battery cell 210 and the battery protection board 220.

[0048] Furthermore, in this embodiment, the fixing frame 100 is a plastic frame, and the battery protection plate 220 is fixed to the plastic frame by heat fusion. Further, the step of assembling and fixing the battery protection plate 220 within the receiving cavity 101 includes: first, installing the battery protection plate 220 at a predetermined position on the fixing frame 100; then, heat fusion fixing the installed battery protection plate 220 to the fixing frame 100, so that the battery protection plate 220 and the plastic frame are firmly connected. Simultaneously, the molten plastic can fill the gap between the battery protection plate 220 and the plastic frame, forming an effective seal, which helps to block dust and moisture, improving the safety of the battery 10. Further still, in other embodiments, a fixing post 120 is also provided on the inner side of the fixing frame 100. During assembly, the fixing hole 222 of the battery mounting plate 220 passes through the fixing post 120, thus preventing the battery mounting plate 220 from shifting during subsequent glue injection, improving the accuracy of molding the injection-molded package 300 within the fixing frame 100.

[0049] Furthermore, the tabs 211 of the cell 220 are bent to form bending grooves 2111 before being placed into the fixing frame 100. This reduces the overall length and makes the battery 10 structure more compact. Simultaneously, during subsequent glue injection, the glue fills the bending grooves 201, encapsulating the tabs 211. The bending grooves 2111, together with the injection-molded package 300, act as a buffer against movement of the cell 210, preventing deformation of the tabs 211 and avoiding damage to the cell 210, thus improving the safety of the battery 10.

[0050] In one embodiment, a glue injection operation is performed on the molding gap 102 to form an injection-molded package 300. Glue is injected using a low-temperature injection mold to fill the molding gap 102, forming the injection-molded package 300 and fixing the battery cell assembly 200 within the fixing frame 100. This prevents the battery cell assembly 200 from shifting or detaching from the fixing frame 100 in subsequent steps. Simultaneously, the injection-molded package 300 protrudes from the battery cell 210, forming an expansion groove 301, which forms the basis of the expansion space 302.

[0051] Furthermore, in this embodiment, an assembly step 3011 is formed around the periphery of the expansion groove 301. The assembly step 3011 is used to install the elastic sheet 400, which facilitates accurate positioning and installation of the elastic sheet 400 when it is subsequently covered, and ensures that the outer surface of the battery 10 forms a complete plane. The assembly step 3011 restricts the elastic sheet 400 from shifting, ensuring that the expansion groove 301 and the elastic sheet 400 form a closed expansion space 302.

[0052] In one embodiment, after step S300 of covering the expansion groove 301 with the elastic sheet 400, the manufacturing method further includes: labeling the battery 10. In this embodiment, the labeling step of the battery 10 specifically involves: attaching a label 500 around the outer surface of the fixing frame 100, and also attaching the label 500 to the portions of the injection-molded package 300 exposed in the fixing frame 100, the outer surface of the elastic sheet 400, and the portions of the cell assembly 200 exposed in the injection-molded package 300, so that the label 500 covers the cell 210, the injection-molded package 300, and the elastic sheet 400 exposed in the opening of the fixing frame 100, thereby assembling the battery 10. The label 500 further fixes the elastic sheet 400, making the elastic sheet 400 completely adhered to the injection-molded package 300, thereby forming a closed expansion space 302 between the expansion groove 301 and the elastic sheet 400.

[0053] Compared with the prior art, this application has at least the following advantages: In the aforementioned battery, the injection-molded package fills the molding gap and protrudes from the battery cell, exposing it on one side of the fixing frame. This creates an expansion groove together with the battery cell. An elastic sheet is placed within the expansion groove, sealing its opening and creating a completely flat outer surface for the battery. Furthermore, the elastic sheet and the injection-molded package form a closed expansion space, essentially embedding the expansion space within the battery. This eliminates the need for pre-reserved expansion space during product design, facilitating miniaturization.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery (10), characterized in that, include: A fixing frame (100) is formed with a receiving cavity (101). A battery cell assembly (200) includes a battery cell (210) located within the receiving cavity (101), and a molding gap (102) is formed between the battery cell (210) and the fixing frame (100). The injection molded package (300) fills the molding gap (102) and protrudes from the battery cell (210) and is exposed on one side of the fixing frame (100), so that the injection molded package (300) and the battery cell (210) together form an expansion groove (301). An elastic sheet (400) is provided on the expansion groove (301) to form an expansion space (302), and the periphery of the elastic sheet (400) abuts against the injection molded package (300).

2. The battery (10) according to claim 1, characterized in that, The injection-molded package (300) is flush with the opening of the receiving cavity (101).

3. The battery (10) according to claim 1, characterized in that, The receiving cavity (101) is provided through the fixing frame (100); and / or, The fixing frame (100) is a plastic frame.

4. The battery (10) according to claim 1, characterized in that, The fixed frame (100) has limit protrusions (110) on both sides. The limit protrusions (110) abut against the side of the battery cell (210) and are connected to the injection molded package (300).

5. The battery (10) according to claim 1, characterized in that, The battery (10) also includes a label (500) which is attached around the outer surface of the fixing frame (100), and the label (500) is also attached to the part of the injection molded package (300) exposed to the fixing frame (100), the outer surface of the elastic sheet (400) and the part of the cell (210) exposed to the injection molded package (300).

6. The battery (10) according to claim 1, characterized in that, One end of the fixing frame (100) is provided with a through hole (1011) communicating with the receiving cavity (101); the battery cell assembly (200) also includes a battery protection board (220), the battery protection board (220) is disposed inside the receiving cavity (101), the tabs (211) of the battery cell (210) are electrically connected to the power receiving end of the battery protection board (220), the output terminal (221) of the battery protection board (220) is located at the through hole (1011), and the injection molded package (300) is also connected to the battery protection board (220); and / or, The tab (211) of the battery cell (210) is in contact with the power terminal of the battery protection board (220).

7. The battery (10) according to claim 6, characterized in that, The inner wall of the receiving cavity (101) has a supporting boss (130) for abutting against the end of the battery cell (210) facing away from the battery protection plate (220), and the supporting boss (130) is disposed opposite to the battery protection plate (220); and / or, The inner wall of the receiving cavity (101) is formed with a fixing post (120), and the battery protection plate (220) has a fixing hole (222) corresponding to the fixing post (120). The fixing post (120) is located in the fixing hole (222), and the injection-molded package (300) is connected to the fixing post (120); and / or, The tabs (211) of the battery cell (210) are formed with bending grooves (2111), and part of the injection-molded package (300) is formed in the bending grooves (2111).

8. The battery (10) according to claim 1, characterized in that, The outer periphery of the fixed frame (100) is provided with a foolproof locking position (140), and the inner wall of the receiving cavity (101) is provided with a protrusion (150) corresponding to the foolproof locking position (140).

9. The battery (10) according to claim 1, characterized in that, The injection-molded package (300) has an assembly step (3011) formed along the periphery of the expansion groove (301), and the elastic sheet (400) abuts against the assembly step (3011) to cover the expansion groove (301).

10. A method for manufacturing a battery (10), characterized in that, The method for manufacturing the battery (10) according to any one of claims 1 to 9 comprises: The battery cell assembly (200) is assembled into the receiving cavity (101); A glue injection operation is performed on the molding gap (102) to form an injection molded package (300). The elastic sheet (400) is placed over the expansion groove (301).

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