Simple device for improving soft swelling of battery cell

Abstract

The utility model discloses a simple device for improving soft swelling of a battery cell, and relates to the technical field of lithium ion battery manufacturing, the simple device comprises a mounting shell used for placing a battery cell body, a plurality of groups of clamping mechanisms which are oppositely arranged at adjustable intervals and are used for applying pressure to the battery cell body are arranged in the mounting shell, and each clamping mechanism comprises an extrusion part and a clamping part, each group of extrusion pieces is provided with a heat dissipation piece used for dissipating heat of the battery cell body to reduce the temperature of the battery cell body so as to prevent soft bulging, so that the phenomenon that the battery cell body is recovered only through hand pressing in the prior art, and the battery cell body is recovered to the original super-thick battery cell body after the hand pressing force is removed in the method is solved; due to the phenomena of human difference, uneven pressing force and the like of hand pressing force, the phenomenon that the battery cell is too thick cannot be well improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery manufacturing technical field, concretely relates to a simple device of improvement of soft drum inflation of electric core. BACKGROUND

[0002] Battery drum inflation refers to the phenomenon of electric core super-thickness caused by aluminum shell deformation in the process of electric core preparation and gas generated in the process of use. At present, the electric core drum inflation is divided into two kinds: one is electric core hard drum inflation, and the other is electric core soft drum inflation. Because the aluminum shell is thin, the electric core may not recover after expansion in the process of baking and formation due to the expansion of the electric core, thereby a large number of unqualified products are produced, and the delivery to the customer end cannot improve the drum inflation phenomenon due to the welding of the sealing nail.

[0003] However, in actual production, most of the improvement methods are focused on the improvement of chemical system and electrolyte, and such improvement methods are mainly aimed at the electric core hard drum inflation. For the soft drum inflation caused by the thin aluminum shell, it is only simply recovered by hand pressing, and such method often recovers into the original super-thickness phenomenon after removing the hand pressing force. In addition, because of the human difference and uneven pressing force of hand pressing, the electric core super-thickness phenomenon cannot be well improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a simple device for improving the soft drum inflation of the electric core, so as to solve the problem that the existing device is only simply recovered by hand pressing, such method often recovers into the original super-thickness phenomenon after removing the hand pressing force, and because of the human difference and uneven pressing force of hand pressing, the electric core super-thickness phenomenon cannot be well improved.

[0005] A simple device for improving the soft drum inflation of the electric core, which comprises a mounting shell for placing the electric core body, a plurality of groups of clamping mechanisms for applying pressure to the electric core body are arranged oppositely and the spacing thereof is adjustable, and the clamping mechanism comprises: an extrusion piece, a plurality of groups of extrusion pieces are provided with heat dissipation pieces for heat dissipation and temperature reduction of the electric core body to prevent soft drum inflation.

[0006] Preferably, the extrusion piece comprises a mounting groove opened in the mounting shell, a plurality of groups of mounting blocks with adjustable spacing are slidably arranged in the mounting groove through an adjusting piece, and a clamping plate for applying pressure to the surface of the electric core body is fixedly arranged on each mounting block.

[0007] Preferably, the adjusting member comprises a rotating rod rotatably arranged in the mounting groove, a mounting block is slidably sleeved on the rotating rod and slidably matched with the inner side wall of the mounting groove, a guide groove corresponding to the mounting block is formed in the circumferential surface of the rotating rod, a protrusion matched with the guide groove is fixedly arranged on the inner side wall of the mounting block, and a drive motor with an output shaft horizontally arranged and a top end fixedly connected with the rotating rod is fixedly arranged on the mounting shell.

[0008] Preferably, the heat dissipation member comprises heat dissipation fins fixedly arranged on the surface of the clamping plate and in contact with the surface of the battery cell body, and a plurality of groups of ventilation openings are further arranged on the clamping plate.

[0009] Preferably, a pressing block in contact with the surface of the battery cell body for pressing is fixedly arranged at the position of each corner of the clamping plate, and the pressing block is a shape memory alloy capable of automatically adjusting the pressing force according to the expansion of the battery cell body.

[0010] Preferably, the mounting shell is detachably mounted with a mounting top cover through a detachable mechanism, and the mounting top cover is provided with ventilation holes for heat dissipation.

[0011] Preferably, the detachable mechanism comprises a mounting bracket fixedly arranged on the mounting shell, a plug rod is slidably arranged in the mounting bracket, a limiting block is fixedly arranged at the top end of the plug rod, springs are sleeved on the plug rod and abut against the side wall of the mounting bracket and the side wall of the spring respectively, a fixing block matched with the mounting bracket is fixedly arranged on the mounting top cover, and a plug hole for the plug rod to penetrate through is formed in the fixing block.

[0012] The simple device for improving the soft expansion of the battery cell body has the advantages that: the device directly limits the expansion deformation of the battery cell body by setting the clamping mechanism and applying pressure to the battery cell body by the extrusion member from the physical layer, the heat dissipation member reduces the temperature of the battery cell body and reduces the risk of expansion caused by the increase of the temperature, a plurality of groups of clamping mechanisms with adjustable spacing can adapt to battery cell bodies of different sizes and specifications, the universality and application range of the device are greatly improved, and the cost of enterprises caused by the difference in battery cell models and the need to equip multiple devices is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 , 2 The structure of the device is shown in different views.

[0014] Figure 3 The sectional view of the device is shown.

[0015] Figure 4 , 5 The structure of the clamping mechanism in the device is shown in different views.

[0016] Figure 6 ​​The utility model discloses an assembly drawing.

[0017] Figure 7 For Figure 6 The partial close -up drawing of A in the middle.

[0018] Among them, 100, install the shell, 101, install the top cover, 102, the vent hole, 103, the electric core body, 200, the clamping mechanism, 201, the installation groove, 202, the rotating rod, 203, the guide slot, 204, the drive motor, 205, the mounting block, 206, the lug, 207, the clamping plate, 208, the vent, 209, the fin, 210, the compression block, 300, the dismounting mechanism, 301, the mounting frame, 302, the plug rod, 303, the limiting block, 304, the spring, 305, the fixed block, 306, the jack. Specific implementation

[0019] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0020] As Figures 1 to 7 Illustrated, a simple device for improving the soft swelling of the electric core, including for placing the electric core body 103 installation shell 100, the installation shell 100 is provided with multiple groups of relative settings and interval adjustable for the electric core body 103 exerting pressure clamping mechanism 200, the clamping mechanism 200 includes: extruding piece, each group of extruding piece is equipped with the heat dissipation piece for the electric core body 103 and is used for the heat dissipation piece of the electric core body 103 and is used for preventing the soft swelling of the heat dissipation piece.

[0021] In use, first, the electric core body 103 is placed into the installation shell 100, and the installation shell 100 provides a stable bearing frame for the whole device, according to the actual size of the electric core body 103, the interval of multiple clamping mechanisms 200 is adjusted, to ensure that the clamping mechanism 200 can accurately fit the electric core body 103, after adjusting the interval, the extruding piece of the clamping mechanism 200 starts to exert pressure on the electric core body 103, and the pressure can inhibit the soft swelling trend of the electric core body 103 to a certain extent, while the extruding piece is working, the heat dissipation piece arranged thereon starts to play a role, and the heat generated by the electric core body 103 during the working process is taken away through heat transfer and other modes, so that the temperature of the electric core body 103 is reduced, and the soft swelling phenomenon is further prevented. By the extruding piece of the clamping mechanism 200 exerting pressure on the electric core body 103, the swelling deformation of the electric core is directly limited from the physical layer, and the heat dissipation piece reduces the swelling risk caused by the temperature rise, in addition, the interval of multiple clamping mechanisms 200 is adjustable, can adapt to electric core bodies 103 of different size specifications, greatly improves the versatility and application range of the device, and reduces the cost of enterprises due to the difference of electric core models.

[0022] In the embodiment, the pressing member comprises a mounting groove 201 formed in the mounting shell 100, and a plurality of groups of mounting blocks 205 with adjustable spacing are slidably arranged in the mounting groove 201 by adjusting members. Each group of mounting blocks 205 is fixedly provided with a clamping plate 207 for pressing the surface of the battery body 103.

[0023] When it is necessary to adjust the spacing of the clamping mechanism 200, the adjusting member is first operated. After the adjusting member is actuated, the mounting block 205 is driven to slide in the mounting groove 201. Since each group of mounting blocks 205 is fixedly provided with a clamping plate 207, the movement of the mounting block 205 will drive the clamping plate 207 to move. After the clamping plate 207 is moved to the appropriate position and can accurately fit the surface of the battery body 103, the surface of the battery body 103 can be pressed.

[0024] In the embodiment, the adjusting member comprises a rotating rod 202 rotatably arranged in the mounting groove 201, the mounting block 205 is slidably arranged on the rotating rod 202 and is in sliding fit with the inner wall of the mounting groove 201, the circumferential surface of the rotating rod 202 is provided with a guide groove 203 corresponding to the mounting block 205, the inner wall of the mounting block 205 is fixedly provided with a protrusion 206 in cooperation with the guide groove 203, and the mounting shell 100 is fixedly provided with a drive motor 204 with an output shaft arranged horizontally and a top end fixedly connected with the rotating rod 202.

[0025] The drive motor 204 is started, the output shaft of the drive motor 204 is rotated, and the rotating rod 202 is synchronously rotated. When the rotating rod 202 is rotated, the guide groove 203 formed on the rotating rod 202 and the protrusion 206 on the mounting block 205 are in cooperation with each other. Since the protrusion 206 is embedded in the guide groove 203, the rotation of the rotating rod 202 will drive the mounting block 205 to slide along the track of the guide groove 203 on the rotating rod 202. At the same time, the mounting block 205 is in sliding fit with the inner wall of the mounting groove 201, which ensures the smooth movement of the mounting block 205 and adjusts the spacing between the plurality of groups of mounting blocks 205, thereby achieving the adaptive clamping of the battery with different sizes.

[0026] In the embodiment, the heat dissipation member comprises heat dissipation fins 209 fixedly arranged on the surface of the clamping plate 207 and in contact with the surface of the battery body 103, and a plurality of groups of ventilation holes 208 are also formed in the clamping plate 207.

[0027] When the clamping plate 207 of the clamping mechanism 200 exerts pressure on the battery body 103, the heat sink 209 in contact with the surface of the battery body 103 begins to function. The heat generated by the operation of the battery is conducted to the heat sink 209, and the air vents 208 on the clamping plate 207 enable air to flow between the clamping plate 207 and the battery. Hot air flows out through the air vents 208, and cold air flows in, accelerating the dissipation of heat and further enhancing the heat dissipation effect, thereby effectively reducing the temperature of the battery body 103 and preventing soft bulging.

[0028] In this embodiment, the clamping plate 207 is fixedly provided with a pressing block 210 at the four corner positions for pressing against the surface of the battery body 103. The pressing block 210 is a shape memory alloy that can automatically adjust the pressure according to the expansion of the battery body 103.

[0029] When the clamping plate 207 exerts pressure on the battery body 103, the pressing block 210 at the four corner positions of the clamping plate 207 first comes into contact with the surface of the battery body 103. As the clamping plate 207 continues to exert pressure, the pressing block 210 uniformly presses the battery, ensuring that the battery receives stable pressure at all corners and avoiding deformation or bulging due to uneven local stress. During the use of the battery body 103, if the battery expands, the surrounding temperature or pressure changes, and the pressing block 210 is made of shape memory alloy, which can sense these changes. When the expansion of the battery is detected, the shape memory alloy automatically adjusts its shape according to the pre-set memory shape, thereby changing the pressure exerted on the battery body 103.

[0030] In this embodiment, the mounting shell 100 is detachably mounted with a mounting top cover 101 through the dismounting mechanism 300, and the mounting top cover 101 is provided with ventilation holes 102 for heat dissipation.

[0031] When the battery body 103 needs to be installed, the dismounting mechanism 300 is operated to disconnect the mounting top cover 101 from the mounting shell 100, and the mounting top cover 101 is removed. The battery is placed in the appropriate position in the mounting shell 100. Then, the dismounting mechanism 300 is operated again to install the mounting top cover 101 back onto the mounting shell 100, completing the installation. When the battery body 103 operates in the mounting shell 100, heat is generated and dissipated upward to the mounting top cover 101. At this time, the ventilation holes 102 in the mounting top cover 101 function, and hot air is discharged to the outside of the device through the ventilation holes 102. Cold air from the outside flows in through other gaps or air vents 208, forming air convection, accelerating the dissipation of heat, and thereby assisting the heat dissipation member to further reduce the temperature of the battery body 103.

[0032] In the embodiment, the dismounting mechanism 300 comprises a mounting frame 301 fixed on the mounting shell 100, a plug rod 302 slidingly penetrating in the mounting frame 301, a limiting block 303 fixed on the top end of the plug rod 302, and a spring 304 sleeved on the plug rod 302 and abutting against the side wall of the mounting frame 301 and the spring 304 at two ends. The mounting top cover 101 is provided with a fixed block 305 used in cooperation with the mounting frame 301, and the fixed block 305 is provided with a plug hole 306 for the plug rod 302 to penetrate.

[0033] During installation, the mounting top cover 101 is aligned with the mounting frame 301 on the mounting shell 100, and the mounting top cover 101 is pressed so that the fixed block 305 is close to the mounting frame 301. At this time, the plug rod 302 is extruded by the fixed block 305 and slides into the mounting frame 301, compressing the spring 304. When the plug hole 306 on the fixed block 305 is aligned with the plug rod 302, the spring 304 rebounds and pushes the plug rod 302 into the plug hole 306, completing the fixation of the mounting top cover 101. During dismounting, the limiting block 303 of the plug rod 302 is pulled upward so that the plug rod 302 is separated from the plug hole 306, and the mounting top cover 101 can be removed.

[0034] Working process and principle: when the device is used, first, the installation top cover 101 is detached from the installation shell 100, the limiting block 303 of the pull rod 302 is pulled, the elastic force of the spring 304 is overcome, the pull rod 302 is separated from the insertion hole 306 of the fixed block 305, and then the installation top cover 101 is removed. Then, the battery body 103 is placed into the installation shell 100, and the installation shell 100 provides a stable bearing frame for the whole device. Then, according to the actual size of the battery body 103, the driving motor 204 is started, the output shaft of the driving motor 204 rotates, and the rotating rod 202 rotates synchronously. The guide groove 203 on the rotating rod 202 cooperates with the protrusion 206 fixed on the inner wall of the installation block 205, when the rotating rod 202 rotates, the installation block 205 slides along the rotating rod 202 under the guidance of the guide groove 203, and simultaneously slides with the inner wall of the installation groove 201, so as to realize the adjustment of the distance between the multiple installation blocks 205, and then drive the clamping plate 207 fixed on the installation block 205 to move, so as to ensure that the clamping plate 207 can accurately fit the battery body 103. After the distance is adjusted, the clamping plate 207 starts to pressurize the surface of the battery body 103, so as to restrain the soft bulging trend of the battery body 103 from the physical level, and at the same time, the heat sink 209 in contact with the surface of the battery body 103 absorbs the heat generated by the work of the battery, the air can flow between the clamping plate 207 and the battery through the air vents 208 arranged at intervals on the clamping plate 207, the hot air flows out through the air vents 208, and the cold air flows in, so as to accelerate the heat dissipation. In addition, the ventilation holes 102 arranged on the installation top cover 101 also participate in heat dissipation, the hot air is discharged to the outside of the device through the ventilation holes 102, and the cold air from the outside flows in, so as to further strengthen the heat dissipation effect, reduce the temperature of the battery body 103, and prevent the soft bulging phenomenon from occurring. During the pressurization process, the pressing block 210 at the four corners of the clamping plate 207 is in contact with the surface of the battery body 103, if the battery expands, the pressing block 210 made of shape memory alloy will sense the change of temperature or pressure, automatically adjust its shape, change the pressure on the battery, and avoid excessive extrusion or insufficient pressure. After the above operation is completed, the installation top cover 101 is pressed against the mounting bracket 301 on the installation shell 100, so that the fixed block 305 approaches the mounting bracket 301. The pull rod 302 is extruded by the fixed block 305 and slides into the mounting bracket 301, and the spring 304 is compressed. When the insertion hole 306 on the fixed block 305 is aligned with the pull rod 302, the spring 304 rebounds and pushes the pull rod 302 into the insertion hole 306, so as to complete the fixation of the installation top cover 101. When the battery is replaced or maintained later, the steps of disassembling the installation top cover 101 are repeated, so that the installation shell 100 can be easily opened and closed, and the inside of the device can be easily inspected, repaired or replaced with the battery.

[0035] As can be known by the technical common sense, the utility model can be realized through other implementation solutions without departing from the spirit or essential characteristics. Therefore, the above disclosed implementation solutions are only examples in all aspects, and are not the only ones. All changes within the scope of the utility model or within the scope equivalent to the utility model are included in the utility model.

Claims

1. A simple device for improving the soft swelling of battery cells, characterized in that: The device includes a mounting housing (100) for placing the battery cell body (103). The mounting housing (100) is provided with multiple sets of clamping mechanisms (200) arranged opposite to each other and with adjustable spacing for applying pressure to the battery cell body (103). The clamping mechanism (200) includes: a pressing member. Each pressing member is provided with a heat dissipation member for dissipating heat from the battery cell body (103) to reduce the temperature of the battery cell body (103) and thus prevent soft swelling.

2. The simple device for improving cell swelling according to claim 1, characterized in that: The extrusion member includes an installation groove (201) opened in the mounting housing (100). Multiple sets of adjustable-spacing mounting blocks (205) are slidably arranged in the installation groove (201) through an adjustment member. Each set of mounting blocks (205) is respectively fixed with a clamp (207) for applying pressure to the surface of the battery cell body (103).

3. A simple device for improving cell swelling according to claim 2, characterized in that: The adjusting component includes a rotating rod (202) rotatably disposed in the mounting groove (201), a mounting block (205) slidably sleeved on the rotating rod (202) and slidably engaged with the inner sidewall of the mounting groove (201), a guide groove (203) corresponding to the mounting block (205) is formed on the circumferential surface of the rotating rod (202), a protrusion (206) cooperating with the guide groove (203) is fixedly provided on the inner sidewall of the mounting block (205), and a drive motor (204) with its output shaft horizontally set and its top end fixedly connected to the rotating rod (202) is fixedly provided on the mounting housing (100).

4. A simple device for improving cell swelling according to claim 3, characterized in that: The heat dissipation component includes heat dissipation fins (209) that are fixedly disposed at intervals on the surface of the clamping plate (207) and in contact with the surface of the battery cell body (103). The clamping plate (207) also has multiple sets of ventilation openings (208) at intervals.

5. A simple device for improving cell swelling according to claim 2, characterized in that: The clamping plate (207) is fixedly provided with clamping blocks (210) at the four corners for pressing against the surface of the battery cell body (103). The clamping blocks (210) are made of shape memory alloy that can automatically adjust the pressure according to the expansion of the battery cell body (103).

6. A simple device for improving cell swelling according to claim 1, characterized in that: The mounting housing (100) is detachably mounted with a mounting top cover (101) via a disassembly mechanism (300), and the mounting top cover (101) is provided with ventilation holes (102) for heat dissipation.

7. A simple device for improving cell swelling according to claim 6, characterized in that: The disassembly and assembly mechanism (300) includes a mounting bracket (301) fixedly mounted on the mounting housing (100). A rod (302) is slidably passed through the mounting bracket (301). A limiting block (303) is fixedly provided at the top end of the rod (302). A spring (304) is sleeved on the rod (302) with its two ends respectively abutting against the side of the mounting bracket (301) and the side wall of the spring (304). A fixing block (305) is fixedly provided on the mounting top cover (101) for use with the mounting bracket (301). The fixing block (305) has an insertion hole (306) for the rod (302) to pass through.

Images