Lithium-ion polymer battery limiting formation fixture

Abstract

The present invention is applicable to the field of battery manufacturing technology, and discloses a limiting formation fixture for a lithium-ion polymer battery, which is used for fixing and limiting during battery formation. It includes an installation body for installing and fixing the battery. The installation body is provided with a receiving groove for receiving the battery. A cover plate for fastening the battery is covered on the installation body. A limiting structure for preventing the battery from loosening or excessively squeezing the battery is arranged between the cover plate and the installation body. The limiting formation fixture for a lithium-ion polymer battery provided by the present invention has a simple structure, can effectively solve the problems of ultra-thin, ultra-thick battery cores and local lithium deposition, and ensures the quality of battery products.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery manufacturing, and particularly relates to a limiting formation fixture for a lithium-ion polymer battery. Background Art

[0002] Lithium-ion polymer batteries have the advantages of high voltage, high specific energy, many cycles of use, long storage time, and small size compared with the same type, and are widely used in portable electronic devices. However, during production, when lithium-ion polymer batteries are formed in a high-temperature fixture, problems frequently occur, such as the electrode cores being ultrathin or ultra-thick due to improper control of the pressure of the pressing plate, and the formation of dark marks on the pressing plate due to the frequent pressing of electrode cores of different sizes, resulting in uneven local stress on the electrode cores during formation and lithium deposition, which affects the quality of the batteries.

[0003] At present, there is no effective solution at home and abroad to the problems of ultrathin or ultra-thick electrode cores caused by high-temperature fixture formation and local lithium deposition of electrode cores caused by dark marks on the pressing plate. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provides a limiting formation fixture for a lithium-ion polymer battery, which has a simple structure, can effectively solve the problems of ultrathin or ultra-thick electrode cores and local lithium deposition, and ensures the quality of battery products.

[0005] The technical solution of the present invention is: a limiting formation fixture for a lithium-ion polymer battery, used for fixing and limiting during battery formation, including an installation body for installing and fixing the battery, the installation body is provided with a receiving groove for receiving the battery, a cover plate for fastening the battery is covered on the installation body, and a limiting structure for preventing the battery from loosening or being excessively pressed is arranged between the cover plate and the installation body.

[0006] Specifically, the limiting structure includes a limiting step formed on the installation body, and the cover plate presses against the limiting step.

[0007] Specifically, the horizontal cross-section of the receiving groove is "rectangular", and the limiting step is formed on the edges of opposite sides of the receiving groove.

[0008] Specifically, the limiting step is arranged around the periphery of the receiving groove.

[0009] Further, the installation body is also provided with an electrode fixing groove for the conductive electrode of the battery to extend out and connect, the electrode fixing groove is communicated with the receiving groove, and an electrode isolation block is arranged in the electrode fixing groove.

[0010] Specifically, a plurality of the receiving grooves are provided on the installation body, and the receiving grooves are evenly distributed on the installation body at equal intervals, and the limiting steps are arranged around the periphery of the installation body.

[0011] Preferably, four receiving grooves are provided and are arranged in two rows side by side on the installation body.

[0012] Specifically, the upper surface and the lower surface of the cover plate are parallel to each other.

[0013] Specifically, both the installation main body and the cover plate are made of hard non-metallic materials.

[0014] Specifically, the length and width dimensions of the receiving groove are equal to the length and width dimensions of the battery.

[0015] The lithium ion polymer battery limiting formation fixture provided by the present invention can fix and install the battery by providing receiving grooves on the installation body, and can ensure the installation stability through the extrusion fixation of the cover plate. Moreover, by providing a limiting structure between the installation body and the cover plate, the position where the cover plate extrudes the battery can be limited, thereby avoiding problems such as the battery being too thick due to insufficient pressure of the cover plate, or the battery being too thin due to excessive extrusion, or local lithium analysis of the battery caused by uneven stress of the battery. Through this limiting structure, the battery can be evenly stressed during formation, ensuring the quality of the battery product. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the lithium ion polymer battery limiting formation fixture provided by an embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of the lithium ion polymer battery limiting formation fixture from another perspective provided by an embodiment of the present invention;

[0018] Figure 3 is another schematic structural diagram of the lithium ion polymer battery limiting formation fixture provided by an embodiment of the present invention. Detailed Embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Such as Figure 1 and Figure 2As shown in the figure, a lithium-ion polymer battery limiting formation fixture 1 provided by an embodiment of the present invention is used for fixing and limiting during battery formation. The battery limiting formation fixture 1 includes an installation body 11 for installing and fixing the battery. The installation body 11 is provided with a receiving groove 12 for receiving the battery. During assembly, the battery is placed in the receiving groove 12, and a cover plate 13 for fastening the battery is provided on the installation body 11. In this way, through the extrusion fixation of the cover plate 13 and the limitation of the receiving groove 12, the battery arranged in the receiving groove 12 can be kept stable without loosening. The cover plate 13 and the installation body 11 are arranged in one-to-one correspondence, avoiding the problem of damage to the flatness of the cover plate 13 caused by mixing different models, and further damaging the upper and lower plates of the formation cabinet, thereby solving the problem of local lithium plating caused by uneven stress on each part of the battery during formation due to the dark pits on the upper and lower plates of the formation cabinet caused by different battery models.

[0021] During actual manufacturing, since there are strict requirements for the extrusion position of the cover plate 13 during battery formation, if the extrusion is not in place or excessive extrusion occurs, it will have an adverse impact on battery formation and affect the overall quality of the battery. To solve these problems, in the embodiment of the present invention, as Figure 1 and Figure 2 shown, a limiting structure 14 for preventing the battery from loosening or excessive extrusion of the battery is provided between the cover plate 13 and the installation body 11. The setting of the limiting structure 14 can provide guidance and limitation for the installation position of the cover plate 13. After the cover plate 13 is covered on the installation body 11, the cover plate 13 can be covered at a suitable position on the installation body 11 and provide a uniform extrusion force to accurately limit and fix the battery in the receiving groove 12, effectively avoiding the situation that the cover plate 13 is not extruded in place, resulting in insufficient extrusion force and causing the battery to be too thick; or the cover plate 13 excessively extrudes the battery and causes the battery to be too thin, which does not meet the requirements. The setting of the limiting structure 14 effectively solves the problems existing in the existing batteries during formation and ensures the overall quality of the battery products.

[0022] During the production and manufacturing of the battery limiting formation fixture 1, the internal structure of the receiving groove 12 on the installation body 11 carrying the battery must be ensured to be smooth and flat, which will not have a negative impact on the appearance of the battery. In addition, the upper and lower surfaces of the installation body 11 and the cover plate 13 are flat and can be in close contact with the upper and lower surfaces of the formation cabinet pressing plate to ensure reliable formation.

[0023] The lithium-ion polymer battery limiting formation fixture 1 provided by the embodiments of the present invention realizes the installation and fixation of the battery by providing a receiving groove 12 on the installation body 11, and covers the installation body 11 with a cover plate 13. The size of the cover plate 13 is designed and selected according to the size of the lithium-ion polymer battery. Each model requires a dedicated installation body 11 and cover plate 13, avoiding the problem of damaging the flatness of the cover plate 13 caused by mixing different models. When the battery is formed, it can be stably fixed in the receiving groove 12 under a uniform extrusion force, avoiding the problem of local lithium deposition caused by uneven stress on the battery. At the same time, by providing a limiting structure 14 between the installation body 11 and the cover plate 13, when the cover plate 13 fixes the battery, the problems of insufficient extrusion resulting in an over-thick battery or excessive extrusion resulting in an over-thin battery are avoided, and the overall quality of the battery formation is ensured. The battery limiting formation fixture 1 is simple and convenient to operate, has a visual and easy-to-judge standard, and has high use reliability.

[0024] Specifically, in the embodiments of the present invention, as Figure 1 and Figure 2 shown, the limiting structure 14 includes a limiting step formed by recessing along the depth direction of the receiving groove 12 on the installation body 11, and the cover plate 13 is pressed against the limiting step. The setting of the limiting step requires that the depth of the entire receiving groove 12 is slightly smaller than the thickness of the battery to be received and installed, so as to ensure that the battery will not be over-extruded, and it also has a space requirement that can meet the deformation amount when the formation device presses down, so that the battery can be stably extruded by the cover plate 13, avoiding the problem of the battery becoming loose due to insufficient extrusion and insufficient pressure. The surface of the installation body 11 that cooperates with the cover plate 13 can also be used as the limiting structure 14, as long as the surface is flat.

[0025] Specifically, in other embodiments, the limiting structure 14 includes a convex block (not shown in the figure) protruding from the cover plate 13. The shape of the convex block is the same as the shape of the receiving groove 12. During assembly, the convex block is inserted into the receiving groove 12, and the function of fixing the battery can also be realized. And, a positioning structure (not shown in the figure) for positioning the insertion depth of the convex block is provided on the side of the convex block or the receiving groove 12, such as a groove or a flange that can be hooked on the edge of the receiving groove 12, which can also realize the precise extrusion and fixation of the battery, preventing the problems of insufficient extrusion or excessive extrusion.

[0026] Specifically, in this embodiment, according to the shape of the battery, the accommodation groove 12 is set to have a "rectangular" horizontal cross-section, and the limiting steps are provided at the edges of the opposite sides of the accommodation groove 12. During installation, the cover plate 13 is placed in the space area formed by the two limiting steps. The limiting steps not only limit the extrusion position of the cover plate 13, but also provide guidance for the installation of the cover plate 13, facilitating the actual installation and fixation of the cover plate 13. Of course, it can be understood that when the battery is of other shapes, the accommodation groove 12 can also be set to other shapes. At this time, the setting method of the limiting steps can be selected according to the actual situation, and no limitation is made here.

[0027] Specifically, in other embodiments, the limiting steps can be arranged around the periphery of the accommodation groove 12. In this way, the limiting steps are arranged around the entire periphery of the accommodation groove 12, and the installation stability is good.

[0028] Further, as Figure 1 and Figure 2 shown, an electrode fixing groove 15 for the conductive electrode of the battery to extend out and connect is also provided on the installation body 11. The electrode fixing groove 15 is communicated with the accommodation groove 12, and an electrode isolation block 16 is arranged in the electrode fixing groove 15. During assembly, the conductive electrode of the battery is fixed in the electrode fixing groove 15, and through the separation of the electrode isolation block 16, the conductive electrodes of different polarities can be separated from each other without affecting each other, ensuring the reliability of use.

[0029] Specifically, as Figure 3 shown, in other embodiments, a plurality of accommodation grooves 12 can also be provided on the installation body 11, and the accommodation grooves 12 are evenly distributed at equal intervals on the installation body 11. In this way, a plurality of batteries can be formed at the same time, improving the processing efficiency. At this time, the limiting steps are arranged around the periphery of the installation body 11, and a pressing plate can be used to press each battery, which is convenient and fast.

[0030] Preferably, as Figure 3 shown, in this embodiment, four accommodation grooves 12 are provided, and they are arranged in two rows side by side on the installation body 11, improving the compactness of the overall structure.

[0031] Specifically, the flatness of the surface of the cover plate 13 determines the overall quality during battery formation. Therefore, the upper surface and the lower surface of the cover plate 13 need to be parallel to each other. At the same time, the surfaces in the accommodation groove 12 also need to be smooth and flat, so that the appearance of the battery will not be affected. Moreover, the surface of the installation body 11 also needs to be smooth and flat, so as to be in close contact with the upper and lower surfaces of the forming cabinet pressing plate, ensuring that each point of the battery can be evenly stressed.

[0032] Specifically, both the installation body and the cover plate 13 are made of hard non-metallic materials, which avoids the phenomenon of battery short-circuit and fire caused by the contact between the installation body 11 and the cover plate 13 and the test site, and ensures the safety of battery production.

[0033] Specifically, during actual production, the length and width dimensions of the receiving groove 12 are equal to those of the battery. Thus, the receiving groove 12 can just be assembled and fixed with the battery without looseness and has good stability. Of course, it can be understood that the length and width dimensions of the receiving groove 12 can also be set to be larger than those of the battery to facilitate the installation of the battery. After the battery is assembled, the battery can be stably fixed by setting other limiting parts in the receiving groove 12, and the setting method is flexible and diverse.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A limiting formation fixture for a lithium-ion polymer battery, which is used for fixing and limiting during battery formation, and is characterized in that, It includes an installation body for installing and fixing a battery. The installation body is provided with a receiving groove for receiving the battery. The depth of the receiving groove is slightly smaller than the thickness of the battery. A cover plate for fastening the battery is covered on the installation body. A limiting structure for preventing the battery from loosening or being overly squeezed is arranged between the cover plate and the installation body. The limiting structure includes a limiting step provided on the installation body and a convex block protruding from the cover plate. The convex block is used to be inserted into the receiving groove during assembly. The shape of the convex block is the same as that of the receiving groove. The cover plate presses against the limiting step. The horizontal cross-section of the receiving groove is "rectangular". The limiting step is provided at the edges of opposite sides of the receiving groove. The limiting step is recessed along the depth direction of the receiving groove. A positioning structure for positioning the insertion depth of the convex block is provided on the side of the convex block or the receiving groove.

2. The lithium-ion polymer battery limiting formation fixture according to claim 1, wherein, The limiting step is arranged around the perimeter of the receiving groove.

3. The limiting formation fixture for the lithium ion polymer battery according to claim 1, characterized in that, The installation body is further provided with an electrode fixing groove for the conductive electrode of the battery to extend out and connect. The electrode fixing groove communicates with the receiving groove, and an electrode isolation block is arranged in the electrode fixing groove.

4. The lithium-ion polymer battery limiting formation fixture according to any one of claims 1 to 3, characterized in that, A plurality of the receiving grooves are provided on the installation body, and each of the receiving grooves is evenly distributed at equal intervals on the installation body. The limiting step is arranged around the perimeter of the installation body.

5. The lithium ion polymer battery limiting formation fixture according to claim 4, characterized in that, Four receiving grooves are provided, and they are arranged in two rows side by side on the installation body.

6. The lithium ion polymer battery limiting formation fixture according to claim 1, characterized in that The upper surface and the lower surface of the cover plate are parallel to each other.

7. The limiting formation fixture for a lithium-ion polymer battery according to claim 1, wherein Both the installation body and the cover plate are made of hard non-metallic materials.

8. The lithium-ion polymer battery limiting formation fixture according to claim 1, characterized in that The length and width dimensions of the receiving groove are equal to the length and width dimensions of the battery.

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