Battery cell with cover plate convenient for pressure relief

Abstract

The utility model discloses a battery cell with a cover plate convenient for pressure relief, which relates to the technical field of energy storage equipment and comprises a shell, a plurality of groups of connecting components are vertically arranged on the outer side of the shell at equal intervals, and a pressure relief component is arranged at the top of the shell through a sealing cover; and lantern rings in the connecting assembly vertically sleeve the outer wall of the shell at equal intervals, a through groove is formed in the center of the rear end face of each lantern ring, and grooves are formed in the inner walls of the two sides of each through groove. According to the utility model, the clamping block is driven to move towards the interior of the groove through the first reset spring and the moving plate in the connecting assembly, so that the convex block is in clearance fit with the interior of the through groove, and the problem that two groups of battery cells are inconvenient to assemble in the prior art is solved; the pressure in the shell is detected in real time through the pressure sensor in the pressure relief assembly, the micro motor is started through the pressure sensor to drive the inner puncture plate to puncture the pressure relief plate, and the problem that existing pressure relief sensitivity is poor is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage equipment, and in particular relates to an electric core with a cover plate that is convenient for pressure relief. Background Art

[0002] With the development of science and technology, people's daily life and production are increasingly inseparable from energy. In order to store and use energy conveniently, various energy storage devices are often used. Among them, batteries are one of the most common energy storage devices, and battery cells are one of the main structural components of batteries.

[0003] The existing document with publication number CN220692252U discloses a pressure relief vent assembly and a battery cell. An exhaust channel is formed inside the housing of the pressure relief vent assembly; a cover is connected to the housing and is arranged at the end of the exhaust channel along the flow direction of gas in the exhaust channel. The cover is provided with a recessed notch; a push piece is installed in the housing, and a protruding ejector portion is formed on the end of the push piece facing the cover. The ejector portion is arranged opposite the notch and has the same shape as the notch. Gas can push the push piece so that the ejector portion pierces the notch.

[0004] However, it still has the following disadvantages in actual use:

[0005] The pressure relief vent assembly and battery cell mentioned above are provided with a pressure relief vent assembly on the battery cell housing, and the pressure inside the battery cell housing is relieved by the pressure relief vent assembly. However, during use, due to the limited voltage of a single battery cell, a single battery cell may not be able to meet the power supply. Therefore, in order to meet the power supply, multiple groups of battery cells are usually provided in a single battery group, and the power supply is met by connecting multiple groups of battery cells in series. However, the battery cells mentioned above are not convenient to assemble with each other and are not convenient to use.

[0006] In the above-mentioned pressure relief and exhaust assembly and battery cell, the push piece is installed inside the shell, and a protruding ejector portion is formed on the end of the push piece facing the cover. The push piece and the ejector portion are used to pierce the notch on the cover to achieve the purpose of pressure relief. However, since the push piece is installed inside the shell, the pressure can only be relieved by the gas generated inside the battery cell pushing the push piece. The air pressure in the battery cell needs to reach a certain value before the ejector portion can pierce the notch, and its pressure relief sensitivity is poor.

[0007] To this end, we provide a battery cell with a cover plate that facilitates pressure relief to solve the above problems. Utility Model Content

[0008] The purpose of the utility model is to provide a battery cell with a cover plate that is convenient for pressure relief. The first return spring and the movable plate in the connecting assembly drive the card block to move toward the inside of the groove, so that the protrusion gap fits inside the through groove, thereby solving the existing problem of inconvenience in assembling two groups of battery cells. The pressure in the outer shell is detected in real time by the pressure sensor in the pressure relief assembly, and the micro motor is started by the pressure sensor to drive the inner puncture plate to puncture the pressure relief plate, thereby solving the existing problem of poor pressure relief sensitivity.

[0009] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0010] The utility model is a battery cell with a cover plate for facilitating pressure relief, comprising a shell, a plurality of groups of connection components are arranged at equal intervals along the vertical direction on the outer side of the shell, and a pressure relief component is arranged on the top of the shell through a sealing cover;

[0011] The collar in the connecting assembly is sleeved on the outer wall of the housing at equal intervals along the vertical direction. A through slot is provided at the center of the rear end face of the collar, and grooves are provided on the inner walls on both sides of the through slot. A protrusion is welded on the front end face of the collar, and a movable plate is movably connected to both sides of the inner side of the protrusion via a first return spring. A clamping block is welded on the end of the movable plate away from the first return spring.

[0012] The pressure relief plate in the pressure relief assembly is fixedly connected to the inside of the pressure relief hole located at the center of the cover, and a mounting frame is welded to the front end of the lower surface of the pressure relief plate, and a micro motor is fixedly connected to the inner bottom of the mounting frame, and a screw rod is fixedly connected to the output shaft of the micro motor, and a second slider is threadedly sleeved on the outer wall of the screw rod, and an inner puncture plate is welded on the rear end surface of the second slider, and a pressure sensor is fixedly connected to the lower surface of the inner puncture plate, and a top plate is fixedly connected to the top of the pressure relief plate, and an outer puncture plate is movably connected between the pressure relief plate and the top plate, and the upper surface of the inner puncture plate and the lower surface of the outer puncture plate are both cross-shaped and have multiple groups of thorns welded at equal intervals.

[0013] The utility model is further configured as follows: a sealing cover is welded to the inner top of the shell, a diaphragm is fixedly connected to the inner center of the shell in the transverse direction, the front and rear ends of the diaphragm are fixedly connected to the anode sheet and the cathode sheet respectively, and the top of the diaphragm is fixedly connected to the sealing plate.

[0014] The utility model is further configured as follows: an anode column and a cathode column are respectively passed through both sides of the surface of the cover, the anode column and the cathode column are respectively electrically connected to the anode sheet and the cathode sheet, and an insulating sleeve is provided on the outside of the anode column and the cathode column.

[0015] The utility model is further configured as follows: multiple groups of fins are vertically passed through the outer walls of both sides of the collar at equal intervals.

[0016] The utility model is further configured as follows: first slide bars are fixedly connected laterally to the upper and lower sides of both sides of the inner portion of the protrusion, and the upper and lower ends of the movable plate are slidably sleeved on the outer wall of the first slide bar.

[0017] The utility model is further configured as follows: limiting frames are welded on both sides of the rear end of the lower surface of the pressure relief plate, the interior of the limiting frames is vertically fixedly connected to a second slide rod, a first slide rod is slidably sleeved on the outer wall of the second slide rod, one side of the first slide rod passes through the limiting frame and is respectively welded to both sides of the rear end surface of the inner puncture plate.

[0018] The present invention is further configured as follows: a mounting groove is provided on the lower surface of the inner puncture plate, and the pressure sensor is fixedly connected to the inner side of the mounting groove.

[0019] The utility model is further configured as follows: fixing rods are welded around the lower surface of the top plate, the bottom ends of the fixing rods are respectively welded around the upper surface of the pressure relief plate, and sliding grooves are provided on the end faces of the fixing rods at the front and rear ends, and the interior of the sliding grooves is vertically movably connected with a third slider, one side of the third slider passes through the sliding groove and is respectively welded to the front and rear end faces of the outer puncture plate, and threaded holes are provided on the outer walls on both sides of the outer puncture plate, and limiting bolts are threadedly penetrated on the fixing rods on both sides, and one end of the limiting bolt is threadedly connected to the interior of the threaded hole.

[0020] The utility model is further configured as follows: a push rod is welded at the center position of the upper surface of the outer puncture plate, the top end of the push rod movably passes through the top plate and is welded to the push plate, a second return spring is sleeved on the outer side of the push rod, and the two ends of the second return spring are respectively fixedly connected to the facing surfaces of the top plate and the outer puncture plate.

[0021] The utility model has the following beneficial effects:

[0022] The utility model provides a connecting component, and drives the movable plate to spontaneously perform a reset movement through a reset spring, so that the movable plate drives the clamping block to move toward the inside of the groove, thereby making the protrusion gap fit inside the through groove, thereby realizing the clamping connection between adjacent rings and the assembly between two groups of battery cells, which is convenient for assembly and disassembly of the battery cells.

[0023] The utility model sets a pressure relief component and monitors the pressure inside the shell in real time through a pressure sensor. When the pressure inside the shell exceeds a preset numerical range, the pressure sensor starts a micro motor, and the micro motor and the screw drive the inner puncture plate to move, and then the thorns on the inner puncture plate pierce the pressure relief plate, thereby achieving pressure relief of the battery cell. The pressure relief sensitivity is high and the safety performance is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a battery cell with a cover plate that facilitates pressure relief;

[0025] Figure 2 This is a partial cross-sectional view of the housing of the utility model;

[0026] Figure 3 This is a schematic structural diagram of the connection assembly of the utility model;

[0027] Figure 4 This is a structural diagram of the card block of the utility model;

[0028] Figure 5 This is a structural disassembly diagram of the cover of the utility model;

[0029] Figure 6 This is a schematic structural diagram of the pressure relief assembly of the utility model;

[0030] Figure 7 This is a schematic diagram of the installation between the installation frame and the inner puncture plate of the utility model;

[0031] Figure 8 This is a bottom view of the inner puncture plate of the utility model;

[0032] Figure 9 This is a schematic structural diagram of the external puncture plate of the present utility model.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1-housing, 101-diaphragm, 102-anode plate, 103-cathode plate, 104-sealing plate, 2-connecting assembly, 201-ring, 201a-fin, 202-through groove, 203-groove, 204-bump, 205-first return spring, 206-moving plate, 206a-first slide bar, 207-block, 3-sealing cover, 301-pressure relief hole, 302-anode column, 303-cathode column, 304-insulating sleeve, 4-pressure relief assembly, 401-pressure relief plate, 401a-limiting frame, 4 01b-second slide rod, 401c-first slide block, 402-mounting frame, 403-micro motor, 404-screw rod, 405-second slide block, 406-inner piercing plate, 406a-mounting slot, 407-pressure sensor, 408-top plate, 408a-fixing rod, 408b-slide slot, 408c-limiting bolt, 409-outer piercing plate, 409a-third slide block, 409b-threaded hole, 409c-push rod, 409d-push plate, 409e-second return spring, 410-protrusion. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Specific embodiment 1

[0036] See also Figure 1-5 As shown, the first embodiment of the present invention provides a battery cell with a cover for facilitating pressure relief, comprising a housing 1, a connecting assembly 2 and a cover 3, wherein the connecting assembly 2 comprises a collar 201, a through groove 202, a protrusion 204, a first return spring 205 and a clamping block 207. The clamping block 207 is driven to move to the inner side of the groove 203 by the first return spring 205, so that the protrusion 204 is clamped in the inside of the through groove 202, thereby solving the problem that existing battery cells are not convenient for quick assembly.

[0037] Specifically, the collar 201 is sleeved on the outer wall of the shell 1 at equal intervals along the vertical direction, and a through groove 202 is provided at the center position of the rear end face of the collar 201, and grooves 203 are provided on the inner walls on both sides of the through groove 202. A protrusion 204 is welded on the front end face of the collar 201, and both sides of the inner side of the protrusion 204 are movably connected to a movable plate 206 through a first return spring 205. A clamping block 207 is welded on the end of the movable plate 206 away from the first return spring 205. The collar 201 is provided to install structures such as the protrusion 204, and the through grooves 202 and the protrusions 204 are provided to clamp adjacent collars 201, and the grooves 203 and the clamping blocks 207 are provided to clamp the through grooves 202 and the protrusions 204. The first return spring 205 and the movable plate 206 are provided to drive the clamping block 207 to move.

[0038] Furthermore, the cover 3 is welded to the inner top of the shell 1, and a diaphragm 101 is fixedly connected to the inner center of the shell 1 in the transverse direction. The front and rear ends of the diaphragm 101 are respectively fixedly connected to the anode sheet 102 and the cathode sheet 103. The top of the diaphragm 101 is fixedly connected to the sealing plate 104. The cover 3 is provided to seal the interior of the shell 1, and the diaphragm 101 is provided to separate the anode sheet 102 and the cathode sheet 103. The arrangement of the anode sheet 102 and the cathode sheet 103 realizes the oxidation or reduction reaction of the electrolyte inside the shell 1, and the sealing plate 104 is provided to seal the electrolyte.

[0039] An anode column 302 and a cathode column 303 are respectively passed through the two sides of the surface of the cover 3. The anode column 302 and the cathode column 303 are electrically connected to the anode sheet 102 and the cathode sheet 103 respectively. The outer sides of the anode column 302 and the cathode column 303 are each provided with an insulating sleeve 304. The arrangement of the anode column 302 and the cathode column 303 realizes the electrical connection between the anode sheet 102 and the cathode sheet 103 and the electronic device. The arrangement of the insulating sleeve 304 is used to insulate the connection between the anode column 302 and the cathode column 303 and the cover 3.

[0040] Multiple groups of fins 201a are vertically and evenly spaced through the outer walls of both sides of the collar 201. The fins 201a are provided to enhance the heat dissipation capability of the housing 1.

[0041] The upper and lower sides of both sides of the inside of the protrusion 204 are fixedly connected with the first sliding rod 206a along the horizontal direction, and the upper and lower ends of the movable plate 206 are slidably mounted on the outer wall of the first sliding rod 206a. The setting of the first sliding rod 206a is used to movably install the movable plate 206 inside the protrusion 204.

[0042] The operation process of this embodiment is as follows: first, external force is applied to the block 207 so that the block 207 moves toward the inside of the protrusion 204. When the block 207 completely moves to the inside of the protrusion 204, the protrusion 204 is loosely fitted on the inner side of the through groove 202. When the protrusion 204 is completely loosely fitted on the inner side of the through groove 202, the external force on the block 207 disappears. At this time, under the action of the first return spring 205, the movable plate 206 and the block 207 move to the initial position, so that the block 207 is loosely fitted inside the groove 203, thereby realizing the assembly between the two groups of battery cells. Specific embodiment 2

[0043] See also Figure 6-9 As shown, it is the second embodiment of the present invention, which is based on the previous embodiment, but is different from the previous embodiment in that: a pressure relief assembly 4 is provided on the top of the shell 1 through the cover 3, and the pressure relief assembly 4 includes a pressure relief plate 401, a micro motor 403, a screw 404, an inner piercing plate 406 and a pressure sensor 407. The micro motor 403 is started by the pressure sensor 407, and the inner piercing plate 406 is driven to move by the micro motor 403 and the screw 404, thereby solving the problem of poor pressure relief sensitivity in the prior art.

[0044] Specifically, the pressure relief plate 401 is fixedly connected to the inside of the pressure relief hole 301 located at the center of the cover 3, and a mounting frame 402 is welded to the front end of the lower surface of the pressure relief plate 401, and a micro motor 403 is fixedly connected to the inner bottom of the mounting frame 402, and a screw rod 404 is fixedly connected to the output shaft of the micro motor 403, and a second slider 405 is threadedly sleeved on the outer wall of the screw rod 404, and an inner puncture plate 406 is welded to the rear end surface of the second slider 405. A pressure sensor 407 is fixedly connected to the lower surface of the inner puncture plate 406, and a top plate 408 is fixedly connected to the top of the pressure relief plate 401. An outer puncture plate 409 is movably connected between the pressure relief plate 401 and the top plate 408. The upper surface of the inner puncture plate 406 and the lower surface of the outer puncture plate 409 are both cross-shaped and welded with multiple groups of thorns 410 at equal intervals. The arrangement of the pressure relief plate 401 is used to The pressure hole 301 is sealed, and when the pressure relief plate 401 is punctured, the pressure relief hole 301 is used to relieve the pressure on the battery cell. The installation frame 402 is used to install structures such as the micro motor 403. The micro motor 403 is used to drive the screw rod 404 to rotate, and the inner puncture plate 406 is driven to move by the setting of the screw rod 404 and the second slider 405, and the pressure relief plate 401 is punctured by the setting of the inner puncture plate 406, the outer puncture plate 409 and the thorn 410. The pressure sensor 407 is used to monitor the pressure inside the shell 1 in real time, and the pressure sensor 407 is electrically connected to the micro motor 403 through the controller, and the micro motor 403 is started or shut down by the pressure sensor 407. The top plate 408 is used to movably install the outer puncture plate 409.

[0045] Furthermore, both sides of the rear end of the lower surface of the pressure relief plate 401 are welded with a limit frame 401a, and the interior of the limit frame 401a is vertically fixedly connected to a second slide bar 401b, and the outer wall of the second slide bar 401b is slidably sleeved with a first slider 401c, one side of the first slider 401c passes through the limit frame 401a and is respectively welded to both sides of the rear end surface of the inner puncture plate 406, and the setting of the limit frame 401a is used to install the second slide bar 401b, and the second slide bar 401b and the first slider 401c are used to movably install the inner puncture plate 406 under the pressure relief plate 401 and limit the movement of the pressure relief plate 401;

[0046] The lower surface of the inner puncture plate 406 is provided with a mounting groove 406a, and the pressure sensor 407 is fixedly connected to the inner side of the mounting groove 406a. The mounting groove 406a is provided for mounting the pressure sensor 407;

[0047] The lower surface of the top plate 408 is welded with fixing rods 408a on all sides, and the bottom ends of the fixing rods 408a are respectively welded to the upper surface of the pressure relief plate 401. The end surfaces of the fixing rods 408a at the front and rear ends are provided with sliding grooves 408b. The interior of the sliding grooves 408b is vertically movably connected with third sliders 409a. One side of the third slider 409a passes through the sliding grooves 408b and is respectively welded to the front and rear end surfaces of the outer piercing plate 409. The outer walls of both sides of the outer piercing plate 409 are provided with threaded holes 408b. 9b, the fixing rods 408a on both sides are threaded with limit bolts 408c, one end of the limit bolts 408c is threadedly connected to the inside of the threaded hole 409b, the setting of the fixing rods 408a is used to install the top plate 408, and the setting of the slide groove 408b and the third slider 409a is used to movably install the outer puncture plate 409 between the pressure relief plate 401 and the top plate 408, and the setting of the limit bolts 408c and the threaded hole 409b is used to limit the movement of the outer puncture plate 409;

[0048] A push rod 409c is welded to the center of the upper surface of the outer puncture plate 409. The top end of the push rod 409c movably passes through the top plate 408 and is welded to a push plate 409d. A second return spring 409e is sleeved on the outer side of the push rod 409c. The two ends of the second return spring 409e are respectively fixedly connected to the facing surfaces of the top plate 408 and the outer puncture plate 409. The setting of the push rod 409c and the push plate 409d is used to drive the outer puncture plate 409 to move, and the setting of the second return spring 409e reduces the magnitude of the external force that pushes the outer puncture plate 409.

[0049] The rest of the structure is the same as that of the first embodiment.

[0050] The operation process of this embodiment is as follows: the pressure inside the housing 1 is monitored in real time by the pressure sensor 407. When the pressure inside the housing 1 exceeds a preset value range, the pressure sensor 407 activates the micro motor 403. The output shaft of the micro motor 403 drives the screw rod 404 to rotate synchronously. Under the action of the threaded connection between the screw rod 404 and the second slider 405, the second slider 405 drives the inner piercing plate 406 to move, so that the thorn 410 on the inner piercing plate 406 penetrates the pressure relief plate 401, thereby realizing automatic pressure relief inside the housing 1.

[0051] When manual pressure relief is required for the outer shell 1, the limiting bolt 408c is screwed so that one end of the limiting bolt 408c moves out from the inside of the threaded hole 409b, and an external force is applied to the push plate 409d, so that the push plate 409d drives the outer piercing plate 409 to move through the push rod 409c, so that the burr 410 on the outer piercing plate 409 penetrates the pressure relief plate 401, thereby realizing manual pressure relief for the interior of the outer shell 1.

[0052] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A battery cell with a cover plate for facilitating pressure relief, comprising a housing (1), a plurality of groups of connecting components (2) being arranged at equal intervals along the vertical direction on the outer side of the housing (1), and a pressure relief component (4) being arranged on the top of the housing (1) through a sealing cover (3), characterized in that: The collar (201) in the connecting assembly (2) is sleeved on the outer wall of the housing (1) at equal intervals in the vertical direction, and a through groove (202) is provided at the center of the rear end face of the collar (201), grooves (203) are provided on the inner walls on both sides of the through groove (202), and a protrusion (204) is welded on the front end face of the collar (201), and both sides of the inner side of the protrusion (204) are movably connected to a movable plate (206) via a first return spring (205), and a clamping block (207) is welded on the end of the movable plate (206) away from the first return spring (205); The pressure relief plate (401) in the pressure relief assembly (4) is fixedly connected to the inside of the pressure relief hole (301) located at the center of the cover (3), and a mounting frame (402) is welded to the front end of the lower surface of the pressure relief plate (401), a micro motor (403) is fixedly connected to the inner bottom of the mounting frame (402), and a screw rod (404) is fixedly connected to the output shaft of the micro motor (403), and a second slider (405) is provided on the outer wall of the screw rod (404) through a threaded sleeve, and the second slider An inner puncture plate (406) is welded to the rear end surface of the block (405), a pressure sensor (407) is fixedly connected to the lower surface of the inner puncture plate (406), and a top plate (408) is fixedly connected above the pressure relief plate (401), an outer puncture plate (409) is movably connected between the pressure relief plate (401) and the top plate (408), and a plurality of groups of convex thorns (410) are welded in a cross shape at equal intervals on the upper surface of the inner puncture plate (406) and the lower surface of the outer puncture plate (409).

2. A battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: The cover (3) is welded to the inner top of the shell (1), and a diaphragm (101) is fixedly connected to the center position of the shell (1) in the transverse direction. The front and rear ends of the diaphragm (101) are fixedly connected to the anode plate (102) and the cathode plate (103), respectively, and the top of the diaphragm (101) is fixedly connected to the sealing plate (104).

3. A battery cell with a cover plate for facilitating pressure relief according to claim 2, characterized in that: An anode column (302) and a cathode column (303) are respectively passed through the two sides of the surface of the cover (3), and the anode column (302) and the cathode column (303) are respectively electrically connected to the anode sheet (102) and the cathode sheet (103), and the outer sides of the anode column (302) and the cathode column (303) are both provided with an insulating sleeve (304).

4. A battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: Multiple groups of fins (201a) are vertically passed through the outer walls of both sides of the collar (201) at equal intervals.

5. The battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: The upper and lower sides of both sides of the interior of the protrusion (204) are both fixedly connected to a first slide bar (206a) in the transverse direction, and the upper and lower ends of the movable plate (206) are both slidably sleeved on the outer wall of the first slide bar (206a).

6. The battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: Limiting frames (401a) are welded to both sides of the rear end of the lower surface of the pressure relief plate (401), and the interior of the limiting frame (401a) is vertically fixedly connected to a second slide rod (401b), and a first slider (401c) is slidably sleeved on the outer wall of the second slide rod (401b), and one side of the first slider (401c) passes through the limiting frame (401a) and is respectively welded to both sides of the rear end surface of the inner puncture plate (406).

7. The battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: A mounting groove (406a) is provided on the lower surface of the inner puncture plate (406), and the pressure sensor (407) is fixedly connected to the inner side of the mounting groove (406a).

8. The battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: The lower surface of the top plate (408) is welded with fixing rods (408a) around the periphery, and the bottom ends of the fixing rods (408a) are respectively welded to the upper surface of the pressure relief plate (401), and the end faces of the fixing rods (408a) at the front and rear ends are provided with sliding grooves (408b), and the interior of the sliding grooves (408b) is vertically movably connected with a third slider (409a), one side of the third slider (409a) passes through the sliding groove (408b) and is respectively welded to the front and rear end faces of the outer puncture plate (409), and threaded holes (409b) are provided on the outer walls of both sides of the outer puncture plate (409), and the limiting bolts (408c) are threadedly passed through the fixing rods (408a) at both sides, and one end of the limiting bolt (408c) is threadedly connected to the interior of the threaded hole (409b).

9. The battery cell with a cover plate for facilitating pressure relief according to claim 1, characterized in that: A push rod (409c) is welded to the center of the upper surface of the outer puncture plate (409), and the top end of the push rod (409c) movably passes through the top plate (408) and is welded to a push plate (409d), and a second return spring (409e) is sleeved on the outer side of the push rod (409c), and the two ends of the second return spring (409e) are respectively fixedly connected to the facing surfaces of the top plate (408) and the outer puncture plate (409).

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