CN210156436U - Tab welding-free battery structure - Google Patents

Abstract

The battery structure of the utility model without welding of the tab is provided with a package assembly, a battery winding core and a central column. In the actual application process, put the battery core into the inner cavity of the battery, when the battery cover is clamped in the sealing rubber ring, the sealing rubber ring will support the inner wall of the battery case, and then the battery cover is fixed in On the battery case; in addition, the battery case and/or the battery cover is provided with a clamping elastic part, when the clamping elastic part is held against the tab, the tab is used to hold the tab to the end of the central column, and then The tabs are clamped between the clamping elastic part and the end of the central column, that is, the tabs do not need to be welded with the battery cover and the battery shell to complete the connection. When the internal pressure of the battery cavity is too large, the internal pressure The clamping elastic part will be deformed. Under the action of the internal pressure, the tabs are no longer clamped between the clamping elastic part and the end of the central column, that is, the circuit breaker protection is realized to prevent the battery from being too high when the internal pressure is too large. The winding core also transmits voltage to the outside, causing corresponding safety accidents.

Description

Tab welding-free battery structure

technical field

The utility model relates to the technical field of battery structures, in particular to a battery structure with tabs free of welding.

Background technique

At present, a battery refers to a part of the space of a cup, tank, or other container or composite container that contains an electrolyte solution and metal electrodes to generate electrical current, a device that converts chemical energy into electrical energy. With positive and negative points. With the advancement of technology, batteries generally refer to small devices that can generate electricity, such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as an energy source can obtain a current with stable voltage, stable current, stable power supply for a long time, and little external influence, and the battery has a simple structure, easy to carry, simple and easy charging and discharging operations, and is not affected by external climate and temperature. Influence, stable and reliable performance, play a great role in all aspects of modern social life.

In the existing battery structure, the battery structure includes a battery cover, a battery case and a battery core, the battery cover is arranged on the battery case, and the battery cover and the battery case together form a battery inner cavity, and the battery core is arranged in the battery inner cavity , and the tabs of the battery core are welded to the battery cover and the battery case respectively. The welding of the tabs is to ensure that the tabs can be stably connected to the battery cover and the battery case, and to ensure the stable output of the battery core. However, there are certain defects in the method of welding the tabs. First, the method of welding the tabs will increase the difficulty of manufacturing the battery structure. It requires equipment with very high operating accuracy to weld the tabs, which will undoubtedly increase the operating cost of the company. Second, when the internal pressure of the battery cavity is too large, the welded tabs cannot be separated from the battery cover and the battery shell, that is, when the internal pressure of the battery structure is too large, the battery core is still transmitting voltage to the outside. There is a considerable safety hazard, and in severe cases, it will lead to the explosion of the battery structure or the eruption of the battery electrolyte, which seriously endangers the safety of the user's life.

Utility model content

The purpose of the present utility model is to overcome the deficiencies in the prior art, and provide a welding-free electrode tab. When the internal pressure of the battery is too large, the tab can be separated from the battery cover and/or the battery case in time, thereby completing the Solder-free battery structure with open-circuit protection tabs.

The purpose of this utility model is to achieve through the following technical solutions:

A pole-ear welding-free battery structure, comprising:

A package assembly, the package assembly includes a battery cover, a sealing rubber ring and a battery case, the battery cover is clamped in the sealing rubber ring, so that the sealing rubber ring is held against the inner wall of the battery case, The battery case and the battery cover together form a battery inner cavity, and a clamping elastic portion is provided on the battery case and/or the battery cover;

a battery winding core, the battery winding core is disposed in the battery inner cavity, the battery winding core is provided with an escape hole, and the battery winding core is provided with a tab; and

A central column, the central column is located in the avoidance hole, and when the clamping elastic part is held against the tab, the tab is used to hold the tab to the end position of the central column , so that the tab is clamped between the clamping elastic part and the end of the central column.

In one embodiment, the clamping elastic portion is located on the battery cover, and when the clamping elastic portion is pushed against the tab, the tab is used to push the tab to the end of the central column so that the tab is clamped between the clamping elastic part and the end of the central column.

In one embodiment, the clamping elastic portion specifically includes an upper clamping elastic portion and a lower clamping elastic portion, the upper clamping elastic portion is located on the battery cover, and the lower clamping elastic portion is located on the battery cover. On the battery case, the tabs specifically include an upper tab and a lower tab, and the central column includes a front end column, a middle end column and a rear end column connected in sequence;

Wherein, when the upper clamping elastic part is pressed against the upper tab, it is used to hold the upper tab to the front end post, so that the upper tab is clamped on the upper tab. clamping between the elastic part and the front end column;

When the lower clamping elastic part is pressed against the lower tab, the lower tab is used to hold the lower tab to the rear end post, and then the lower tab is clamped on the lower clamping elastic part and the lower tab. between the rear pillars.

In one of the embodiments, the upper clamping elastic portion is recessed downward toward the direction of the inner cavity of the battery.

In one embodiment, the lower clamping elastic portion protrudes upward toward the direction of the inner cavity of the battery.

In one embodiment, an upper insulating member is disposed between the front end post and the upper tab.

In one of the embodiments, a lower insulating member is disposed between the rear end column and the lower tab.

In one of the embodiments, the escape hole is located at a middle position of the battery winding core.

In one embodiment, the battery case includes an encapsulation shell and a bent edge that are connected in sequence, the encapsulation shell and the battery cover together enclose a battery inner cavity, and the battery cover is clamped on the battery cover. inside the sealing rubber ring, so that the sealing rubber ring is respectively abutted against the inner wall of the package shell and the inner wall of the bending edge sealing.

In one of the embodiments, the package casing and the bending edge are integrally formed.

Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

The battery structure of the utility model without welding of the tab is provided with a package assembly, a battery winding core and a central column. In the actual application process, the battery core is put into the inner cavity of the battery. When the battery cover is clamped in the sealing rubber ring, the sealing rubber ring will support the inner wall of the battery case, and then the battery cover will be fixed on the sealing ring. On the battery case; in addition, the battery case and/or the battery cover is provided with a clamping elastic part, when the clamping elastic part is pressed against the tab, the tab is used to hold the tab to the end of the central column, and then The tabs are clamped between the clamping elastic part and the end of the central column, that is, the tabs do not need to be welded with the battery cover and the battery shell to complete the connection. When the internal pressure of the battery cavity is too large, the internal pressure The clamping elastic part will be deformed. Under the action of the internal pressure, the tabs are no longer clamped between the clamping elastic part and the end of the central column, that is, the circuit breaker protection is realized to prevent the battery from being too high when the internal pressure is too large. The winding core also transmits voltage to the outside, causing corresponding safety accidents.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a battery structure with tabs free of welding in an embodiment of the present invention;

2 is a schematic diagram of the internal structure of a battery structure with tabs free of welding in an embodiment of the present invention;

Fig. 3 is the enlarged schematic diagram of Fig. 2 at A;

FIG. 4 is an enlarged schematic view at B in FIG. 2 .

Detailed ways

In order to facilitate the understanding of the present utility model, the present utility model will be more fully described below with reference to the related drawings. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 and FIG. 2 together. A battery structure 10 without tab welding includes a package assembly 100 , a battery core 200 and a center post 300 .

In this way, it should be noted that the packaging component 100 plays a role of encapsulating and protecting the battery winding core 200 ; the battery winding core 200 plays a role of supplying voltage to external electrical equipment; And the function of preventing excessive expansion of the battery core 200 and protecting the battery core 200 .

Referring again to FIG. 2 , the package assembly 100 includes a battery cover 110 , a sealing rubber ring 120 and a battery case 130 . The battery cover 110 is clamped in the sealing rubber ring 120 , so that the sealing rubber ring 120 is pressed against the inner wall of the battery case 130 . , the battery case 130 and the battery cover 110 together form a battery inner cavity, and the battery case 130 and/or the battery cover 110 are provided with a clamping elastic portion 140 .

In this way, it should be noted that both the battery cover 110 and the battery case 130 play the role of encapsulating and protecting the battery core 200, and at the same time, the battery cover 110 and the battery shell 130 together form a battery inner cavity, and the battery inner cavity is used for placing the battery core. 200; the sealing rubber ring 130 plays the role of sealing and waterproofing, placing the external water droplets into the inner cavity of the battery, causing a short circuit of the battery core 200; the clamping elastic part 140 is used in conjunction with the central column 300 to complete the battery core The tabs of 200 are connected to the battery cover 110 and the battery case 130 without welding.

Please refer to FIG. 2 again, the battery winding core 200 is disposed in the inner cavity of the battery, the battery winding core 200 is provided with an escape hole 210 , and the battery winding core 200 is provided with a tab 220 .

In this way, it should be noted that the battery winding core 200 plays the role of providing voltage to the external electrical equipment; the opening of the avoidance holes 210 can make the structure of the battery structure 10 without tab welding more compact.

Please refer to FIG. 2 again, the center post 300 is located in the avoidance hole 210 . When the clamping elastic portion 140 is held against the tab 220 , the tab 220 is held up to the end of the center post 300 , so that the The tabs 220 are clamped between the clamping elastic portion 140 and the end of the center post 300 .

In this way, it should be noted that the battery case 130 and/or the battery cover 110 is provided with a clamping elastic portion 140, and when the clamping elastic portion 140 is held against the tab 220, it is used to hold the tab 220 to the center column. 300, so that the tab 220 is clamped between the clamping elastic portion 140 and the end of the central column 300, that is, the tab 220 does not need to be welded with the battery cover 110 and the battery case 130 to complete the connection. , when the internal pressure of the inner cavity of the battery is too large, the internal pressure will deform the clamping elastic part 140 , and under the action of the internal pressure, the tab 220 is no longer clamped between the clamping elastic part 140 and the central column 300 . Between the ends, the circuit breaker protection is realized to prevent the battery core from transmitting voltage to the outside when the internal pressure is too large, causing corresponding safety accidents.

It should also be noted that since the tabs 220 do not need to be welded with the battery cover 110 and the battery case 130, when the internal pressure of the battery cavity is too large, at least part of the battery cover 110 will detach from the sealant under the action of the internal pressure. ring 120, that is, when the internal pressure of the battery cavity is too large, there is a certain gap between the battery cover 110 and the sealing rubber ring 120, or the battery cover 110 is completely separated from the sealing rubber ring 120, and the battery structure 10 with the tabs free of welding completes its own operation. For the pressure relief operation, compared with the traditional battery structure that needs to be provided with an explosion-proof disc to complete the pressure-relief operation, the manufacturing cost of the battery structure 10 without welding of the tabs of the present application is relatively low, and the structure is more compact, and no explosion-proof disc is required to be installed. It can have the function of self-releasing pressure.

It should also be noted that, when the battery cover 110 is assembled on the central column 300 , the central column 300 can also prevent the battery cover 110 from being displaced excessively to squeeze the battery core 200 . When the tab 220 is clamped between the clamping elastic portion 140 and the end of the central column 300, the battery cover 110 cannot continue to be pressed down and displaced under the action of the central column 300, and the central column 300 It effectively prevents the battery cover 110 from extruding the battery core 200 excessively due to the excessive downward pressure, causing the battery core 200 to protect the battery core 200 to a certain extent; In the position hole 210 , due to the opening of the position avoidance hole 210 , the force on the battery core 200 will be uneven. When the battery core 200 expands due to unexpected factors, the center column 300 located in the position avoidance hole 210 can be well In order to prevent the battery core 200 from being excessively expanded, the battery core 200 is not damaged.

Further, please refer to FIG. 2 again, in one embodiment, the clamping elastic portion 140 is located on the battery cover 110 , and when the clamping elastic portion 140 is held against the tab 220 , the tab 220 is pressed to the center At the end of the column 300 , the tab 220 is clamped between the clamping elastic portion 140 and the end of the central column 300 .

In this way, it should be noted that, considering the difficulty of the manufacturing process, only the clamping elastic portion 140 can be provided on the battery cover 110 , and the working principle of the clamping elastic portion 140 will not be repeated, please refer to the above-mentioned clamping elastic portion 140 working principle. It should be emphasized that the clamping elastic portion 140 has a certain deformability. When the battery cover 110 supports the clamping elastic portion 140 to the end position of the central column 300, according to the principle of force interaction, the central column 300 also has the same deformation ability. The clamping elastic portion 140 is also held up by the tabs 220, and the clamping elastic portion 140 will inevitably deform to a certain extent. increase, so that the interaction force between the battery cover 110 and the battery case 130 is stronger, that is, the battery cover 110 can be installed on the battery case 130 more stably, and the interaction force between the battery cover 110 and the battery case 130 is optimized, and further The sealing performance of the tab welding-free battery structure 10 is further improved.

Further, please refer to FIG. 2 , FIG. 3 and FIG. 4 together. In one embodiment, the clamping elastic portion 140 specifically includes an upper clamping elastic portion 141 and a lower clamping elastic portion 142 , and the upper clamping elastic portion 141 is located at the On the battery cover 110 , the lower clamping elastic portion 142 is located on the battery case 130 , the tab 220 specifically includes an upper tab 221 and a lower tab 222 , and the central column 300 includes a front end column 310 , a middle end column 320 and a rear end connected in sequence. column 330;

Wherein, when the upper clamping elastic portion 141 is pressed against the upper tab 221, it is used to hold the upper tab 221 to the front end post 310, so that the upper tab 221 is clamped on the upper clamping elastic portion 141 and the front end. between columns 310;

When the lower clamping elastic portion 142 is held against the lower tab 222, the lower tab 222 is pressed to the rear end post 330, and then the lower tab 222 is clamped on the lower clamping elastic portion 142 and the rear end post between 330.

In this way, it should be noted that, in order to allow the tabs 220 of the battery winding core 200 to be clamped better and more stably, in one embodiment, both the battery cover 110 and the battery case 130 are provided with clamping elastic portions 140, The clamping elastic part 140 specifically includes an upper clamping elastic part 141 and a lower clamping elastic part 142 , the upper clamping elastic part 141 is located on the battery cover 110 , the lower clamping elastic part 142 is located on the battery shell 130 , and the upper clamping elastic part The specific working principles of 141 and the lower clamping elastic portion 142 will not be repeated, please refer to the above-mentioned working principle of the clamping elastic portion 140 . The upper clamping elastic portion 141 is provided so that the upper tab 220 of the battery winding core 200 is clamped between the upper clamping elastic portion 141 and the front end post 310 , and the lower clamping elastic portion 142 is provided for the battery winding core 200 . The lower tab is clamped between the lower clamping elastic portion 142 and the rear end post 330, so that the tab 220 of the battery core 200 does not need to be welded to the battery cover 110 and the battery case 130 respectively, which greatly improves the electrode tab. For the safety of the welding-free battery structure 10, when the internal pressure of the battery cavity is too large, the upper clamping elastic part 141 and the lower clamping elastic part 142 will deform to a certain extent under the action of the internal pressure, so that the upper tabs are deformed to a certain extent. 221 and the lower tabs 222 are no longer clamped, so as to realize open circuit protection and prevent the battery core 200 from supplying power to external electrical equipment when the pressure in the battery cavity is too large, causing corresponding safety accidents.

It should also be noted that, in addition to the clamping elastic portion 140 being provided on the battery cover 110 alone, the clamping elastic portion 140 may also be provided solely on the battery case 130, regardless of whether the clamping elastic portion 140 is provided on the battery cover 110 or the battery case 130 , the functions and effects of the clamping elastic portion 140 are the same, all of which are for the tabs 220 of the battery winding core 200 to be clamped between the clamping elastic portion 140 and the end of the central column 300 to realize the For welding, when the internal pressure of the battery cavity is too large, the elastic portion 140 can no longer hold the tabs 220 of the battery core 200 under the action of the internal pressure, that is, the situation of excessive internal pressure can be realized. circuit breaker protection.

Further, please refer to FIG. 3 again, in one embodiment, the upper clamping elastic portion 141 is recessed downward in the direction toward the battery cavity.

In this way, it should be noted that the upper clamping elastic portion 141 is recessed downward in the direction of the inner cavity of the battery. The purpose of this design is that when the battery cover 110 is assembled, the battery cover 110 can be pressed down with the battery cover. 110 is pressed down, and the upper clamping elastic portion 141 recessed downward toward the inner cavity of the battery can be in contact with the tabs of the battery core 200 , thereby clamping the tabs 220 of the battery core 200 . Of course, the orientation of the upper clamping elastic portion 141 can be flexibly set according to the actual situation. For example, the upper clamping elastic portion 141 is raised upward toward the battery cavity. The difference is that during assembly, the upper clamping elastic portion 141 When it protrudes upward in the direction of the battery cavity, it is necessary to use external force to press the upwardly protruding upper clamping elastic portion 141 toward the battery cavity, so that the upper clamping elastic portion 141 is deformed to a certain extent to contact the battery core 200 . 220 of the tabs.

Further, please refer to FIG. 4 again, in one embodiment, the lower clamping elastic portion 142 protrudes upward toward the battery cavity.

In this way, it should be noted that the lower clamping elastic portion 142 protrudes upward toward the battery cavity. The purpose of this design is that, when the battery cover 110 is assembled, the front end post 310 can be pushed down when the battery cover 110 is pressed down. When holding the upper tab 221, the rear end post 330 will also hold the lower tab 222, and at the same time, the lower clamping elastic portion 142 will also hold the lower tab 222 when pressing the battery cover 110 down, so that the lower tab 222 is held by the lower tab 222. It is clamped between the lower clamping elastic portion 142 and the rear end column 330 . Of course, the orientation of the lower clamping elastic portion 142 can be flexibly set according to the actual situation. For example, the lower clamping elastic portion 142 is recessed downward toward the battery cavity. The difference is that during assembly, the lower clamping elastic portion 142 When the lower clamping elastic portion 142 is dented downward toward the battery cavity, it is necessary to use external force to press the downwardly dented lower clamping elastic portion 142 toward the battery inner cavity, so that the lower clamping elastic portion 142 is deformed to contact the lower tab 222 .

Further, in one embodiment, an upper insulating member is disposed between the front end post 310 and the upper tab 221 .

In this way, it should be noted that the upper insulating member plays the role of insulating isolation. Considering the overall mechanical strength of the front end column 310 , the front end column 310 is preferably made of a metal material, but it is necessary to separate the front end column 310 and the upper tab 221 between the front end column 310 . An upper insulating member is provided to prevent the upper tab 221 and the lower tab 222 from being directly short-circuited together.

Further, in one embodiment, a lower insulating member is disposed between the rear end post 330 and the lower tab 222 .

In this way, it should be noted that the lower insulating member plays the role of insulating isolation. Considering the overall mechanical strength of the rear end column 330, the rear end column 330 is preferably made of metal material, but it is necessary to separate the rear end column 330 from the lower tab. A lower insulating member is arranged between 222 to prevent the upper tab 221 and the lower tab 222 from being directly short-circuited together.

Further, please refer to FIG. 2 again, in one embodiment, the escape hole 210 is located at the middle position of the battery winding core 200 .

In this way, it should be noted that the escape hole 210 is located in the middle of the battery winding core 200, so that the central column 300 located in the escape hole 210 and the battery winding core 200 are evenly stressed, and the central column 300 and the battery winding core 200 are extended. service life.

Further, please refer to FIG. 2 again, in one embodiment, the battery case 130 includes an encapsulation casing 131 and a bent edge 132 connected in sequence, and the encapsulation casing 131 and the battery cover 110 together enclose a battery inner cavity, and the battery cover 110 is clamped in the sealing rubber ring 120 , so that the sealing rubber ring 120 abuts against the inner wall of the package casing 131 and the inner wall of the bent edge 132 respectively.

In this way, it should be noted that the packaging shell 131 plays a protective role to protect the battery core 200; the bending edge 132 functions to limit the battery cover 110, and the bending edge 132 can optimize the battery cover 110 and the battery The interaction force between the shells 130, and at the same time, the setting of the bent sealing edge 132 can simplify the assembly process of the battery structure 10 without the tab welding, and the user only needs to press the battery cover 110 to complete the assembly operation. With the crimped battery structure, the assembly process of the present application is relatively simple, which greatly improves the assembly efficiency.

It should also be noted that when the battery case 130 is provided with the clamping elastic portion 140 , the clamping elastic portion 140 is located on the packaging case 131 .

Further, please refer to FIG. 2 again, in one embodiment, the package casing 131 and the bending edge 132 are integrally formed.

In this way, it should be noted that the design of the packaging shell 131 and the bending edge 132 as an integral molding structure can improve the overall mechanical strength of the battery shell 130 and prolong the service life of the battery shell 130, thereby better protecting the battery core. 200.

The battery structure of the utility model without welding of the tab is provided with a package assembly, a battery winding core and a central column. In the actual application process, the battery core is put into the inner cavity of the battery. When the battery cover is clamped in the sealing rubber ring, the sealing rubber ring will support the inner wall of the battery case, and then the battery cover will be fixed on the sealing ring. On the battery case; in addition, the battery case and/or the battery cover is provided with a clamping elastic part, when the clamping elastic part is pressed against the tab, the tab is used to hold the tab to the end of the central column, and then The tabs are clamped between the clamping elastic part and the end of the central column, that is, the tabs do not need to be welded with the battery cover and the battery shell to complete the connection. When the internal pressure of the battery cavity is too large, the internal pressure The clamping elastic part will be deformed. Under the action of the internal pressure, the tabs are no longer clamped between the clamping elastic part and the end of the central column, that is, the circuit breaker protection is realized to prevent the battery from being too high when the internal pressure is too large. The winding core also transmits voltage to the outside, causing corresponding safety accidents.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. A welding-free battery structure for tabs is characterized in that, comprising: A package assembly, the package assembly includes a battery cover, a sealing rubber ring and a battery case, the battery cover is clamped in the sealing rubber ring, so that the sealing rubber ring is held against the inner wall of the battery case, The battery case and the battery cover together form a battery inner cavity, and a clamping elastic portion is provided on the battery case and/or the battery cover; a battery winding core, the battery winding core is disposed in the battery inner cavity, the battery winding core is provided with an escape hole, and the battery winding core is provided with a tab; and A central column, the central column is located in the avoidance hole, and when the clamping elastic part is held against the tab, the tab is used to hold the tab to the end position of the central column , so that the tab is clamped between the clamping elastic part and the end of the central column. 2 . The battery structure of claim 1 , wherein the clamping elastic part is located on the battery cover, and when the clamping elastic part is held against the tab At the position where the tabs are pushed up to the end of the central column, the tabs are further clamped between the clamping elastic portion and the end of the central column. 3. The battery structure of claim 1, wherein the clamping elastic part specifically comprises an upper clamping elastic part and a lower clamping elastic part, and the upper clamping elastic part is located at the on the battery cover, the lower clamping elastic part is located on the battery case, the tabs specifically include an upper tab and a lower tab, and the central column includes a front end column, a middle end column and a rear end connected in sequence column; Wherein, when the upper clamping elastic part is pressed against the upper tab, it is used to hold the upper tab to the front end post, so that the upper tab is clamped on the upper tab. clamping between the elastic part and the front end column; When the lower clamping elastic part is pressed against the lower tab, the lower tab is used to hold the lower tab to the rear end post, and then the lower tab is clamped on the lower clamping elastic part and the lower tab. between the rear pillars. 4 . The battery structure of claim 3 , wherein the upper clamping elastic portion is recessed downward toward the battery cavity. 5 . 5 . The battery structure of claim 3 , wherein the lower clamping elastic portion protrudes upward toward the inner cavity of the battery. 6 . 6 . The battery structure of claim 3 , wherein an upper insulating member is arranged between the front end post and the upper tab. 7 . 7 . The battery structure without tab welding according to claim 3 , wherein a lower insulating member is arranged between the rear end post and the lower tab. 8 . 8 . The battery structure of claim 1 , wherein the avoidance hole is located at a middle position of the battery winding core. 9 . 9 . The battery structure without tab welding according to claim 1 , wherein the battery case comprises an encapsulation shell and a bending edge that are connected in sequence, and the encapsulation shell and the battery cover jointly surround the battery cover. 10 . A battery inner cavity is formed, and the battery cover is clamped in the sealing rubber ring, so that the sealing rubber ring is respectively abutted against the inner wall of the package casing and the inner wall of the bending edge. 10 . The battery structure without welding of tabs according to claim 9 , wherein the packaging shell and the bending edge are integrally formed. 11 .

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