Battery cell assembly structure, battery module and battery pack

Abstract

The utility model discloses a battery cell assembly structure, a battery module and a battery pack. The battery cell assembly structure comprises a battery cell group, a conductive bonding part, a protection circuit board and a first rubber shell, the battery cell group comprises at least one battery cell, and the battery cells are arranged in a laminated manner along the thickness direction of the battery cell group; the first rubber shell is arranged on one side of the battery cell group in the thickness direction; the conductive bonding part is arranged between the battery cell group and the first rubber shell and is used for bonding and fixing the first rubber shell and the battery cell group; and a switch is arranged on the protection circuit board and is electrically connected with the conductive bonding part and the battery cell group to form an electrolytic glue loop. According to the technical scheme provided by the embodiment of the utility model, a battery cell aluminum plastic film and a rubber shell can be effectively prevented from being damaged when the battery is disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field especially relates to a kind of electric core assembly structure, battery module and battery pack. BACKGROUND

[0002] In the process of battery assembly, the prior art will usually adopt double-sided adhesive to adhere to the surface of the battery cell to be bonded with the glue shell. In the process of disassembling the battery, the battery cell and the glue shell can be separated by using a debonding agent, a disassembly tool and other tool materials, which can easily cause the aluminum plastic film of the battery cell to wrinkle or be damaged, or cause damage to the glue shell. SUMMARY

[0003] The utility model provides a kind of electric core assembly structure, battery module and battery pack, to solve the problem of causing the aluminum plastic film of the battery cell to wrinkle or be damaged, and the damage of glue shell when disassembling the battery.

[0004] According to an aspect of the utility model, an electric core assembly structure is provided, comprising: an electric core group, a conductive bonding part, a protection circuit board and a first glue shell;

[0005] The electric core group includes at least one electric core, and each electric core is stacked and arranged in the thickness direction of the electric core group. The first glue shell is arranged on one side of the electric core group in the thickness direction.

[0006] The conductive bonding part is arranged between the electric core group and the first glue shell, and is used to bond and fix the first glue shell and the electric core group.

[0007] The protection circuit board is provided with a switch, and the switch is electrically connected with the conductive bonding part and the electric core group to form an electrolytic glue loop.

[0008] Optionally, the conductive bonding part includes a first conductor layer, an electrolytic glue layer and a second conductor layer arranged in layers.

[0009] The first conductor layer is arranged on one side of the electrolytic glue layer close to the electric core group, and the second conductor layer is arranged on one side of the electrolytic glue layer away from the electric core group. The second conductor layer is adhesively connected with the first glue shell.

[0010] The first end of the protection circuit board is electrically connected with the first conductor layer, and the second end of the protection circuit board is provided with a conductive contact part, which is electrically connected with the second conductor layer.

[0011] Optionally, the first conductor layer and the second conductor layer are provided with a first end and a second end on one side of the tab close to the electric core group.

[0012] A first conductive connecting part is arranged at the first end of the first conductor layer, and the first conductive connecting part is in an integral structure with the first conductor layer; the first conductive connecting part comprises a first plane, a second plane and a bending part; the first plane is in the same plane with the first conductor layer, the second plane is in a different plane with the first conductor layer, and the second plane is connected with the first plane through the bending part;

[0013] A second conductive connecting part is arranged at the second end of the second conductor layer, and the second conductive connecting part is in an integral structure with the second conductor layer and in the same plane with the second conductor layer;

[0014] The orthographic projection of the first conductive connecting part on the battery cell group and the orthographic projection of the second conductive connecting part on the battery cell group are staggered.

[0015] Optionally, the first end of the protection circuit board is electrically connected with the first conductive connecting part.

[0016] The second end of the protection circuit board is in contact with the second conductive connecting part through the conductive contact part, so that the first conductor layer and the second conductor layer are electrically connected.

[0017] Optionally, the conductive contact part comprises any one of conductive foam, conductive plastic and conductive rubber.

[0018] Optionally, the conductive bonding part further comprises an insulating adhesive layer.

[0019] The insulating adhesive layer is arranged on the side of the first conductor layer away from the electrolytic adhesive layer, and the insulating adhesive layer is used for insulating the battery cell group from the conductive bonding part.

[0020] Optionally, the protection circuit board further comprises a resistor.

[0021] The resistor is electrically connected between the switch and the battery cell group.

[0022] Optionally, the battery cell assembly structure further comprises a second adhesive shell.

[0023] The second adhesive shell is located on the side of the battery cell group away from the first adhesive shell, and the second adhesive shell is connected with the first adhesive shell to form a cavity; the cavity is used for accommodating the battery cell group and the conductive bonding part.

[0024] According to another aspect of the present application, a battery module is provided, comprising the battery cell assembly structure according to any embodiment of the first aspect.

[0025] According to another aspect of the utility model, provide a kind of battery pack, it is characterized in that, including shell and at least one as described in the battery module of second aspect embodiment, the shell is wrapped in the outside of the battery module.

[0026] The cell assembly structure provided in the embodiment of the utility model sets the conductive bonding part to bond and fix the cell group and the first glue shell, the conductive bonding part is connected with the protection circuit board, and the switch is arranged on the protection circuit board. The switch is electrically connected with the conductive bonding part and the cell group, so as to form an electrolytic glue loop. In the process of disassembling the battery, the electrolytic glue loop can be turned on by controlling the switch to close, and the cell group provides current for the electrolytic glue loop. After the current passes through the conductive bonding part for a period of time, the inside of the conductive bonding part loses the adhesion effect, so that the cell group and the first glue shell can be quickly and simply separated. Compared with the mode of bonding the cell and the shell by using double-sided adhesive tape in the related art, tools such as glue remover and disassembly sheet are required when disassembling the battery, which is easy to cause damage to the cell aluminum plastic film and the shell. The cell assembly structure provided in the embodiment of the utility model can effectively prevent the cell and the first glue shell from being damaged during disassembly.

[0027] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating labor.

[0029] Figure 1 is an explosion view of another kind of cell assembly structure provided according to the embodiment of the utility model;

[0030] Figure 2 is an explosion view of another kind of cell assembly structure provided according to the embodiment of the utility model;

[0031] Figure 3 is an assembly structure schematic view of a kind of cell assembly structure provided according to the embodiment of the utility model;

[0032] Figure 4 is Figure 3 enlarged structure schematic view in dotted circle of

[0033] Figure 5 is an explosion view of another kind of cell assembly structure provided according to the embodiment of the utility model;

[0034] Figure 6 An equivalent circuit diagram of the electrolytic glue loop is provided according to the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0036] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0037] The embodiment of the present application provides a battery cell assembly structure. Figure 1 An explosion diagram of the battery cell assembly structure is provided in the embodiment of the present application. As shown in the figure, Figure 1 The battery cell assembly structure comprises a battery cell group 10, a conductive bonding part 20, a protection circuit board 30 and a first glue shell 40.

[0038] The battery cell group 10 comprises at least one battery cell 11, and each battery cell 11 is stacked and arranged along the thickness direction of the battery cell group 10; the first glue shell 40 is arranged on one side of the battery cell group 10 in the thickness direction; the conductive bonding part 20 is arranged between the battery cell group 10 and the first glue shell 40, and is used for bonding and fixing the first glue shell 40 and the battery cell group 10; the protection circuit board 30 is provided with a switch, and the switch is electrically connected with the conductive bonding part 20 and the battery cell group 10, forming an electrolytic glue loop.

[0039] Specifically, in the process of assembling the battery cell, the battery cell group 10 can comprise at least one battery cell 11, and each battery cell 11 is stacked and arranged, so as to realize the assembly of multiple battery cells. Exemplarily, Figure 1The electric cell group 10 includes a single cell 11, and the number of the cells 11 can be set by the user according to the actual use, which is not limited herein. The first glue shell 40 is located in the thickness direction of the electric cell group 10, and the first glue shell 40 has a certain depth, so that the electric cell group 10 can be placed in the first glue shell 40.

[0040] The electrically conductive bonding part 20 is arranged between the electric cell group 10 and the first glue shell 40, and the electrically conductive bonding part 20 and the first glue shell 40 can be fixed by glue adhesion, or the electrically conductive bonding part 20 can be mechanically embedded in the first glue shell 40, which is not limited herein. The electrically conductive bonding part 20 and the electric cell group 10 are also fixed by glue adhesion, so that the electric cell group 10 is fixed in the first glue shell 40.

[0041] The electrically conductive bonding part 20 has electrically conductive properties, and the switch on the protection circuit board 30 electrically connected with the electrically conductive bonding part 20 is exemplarily a mechanical switch. It should be noted that, Figure 1 The switch on the protection circuit board 30 is not shown in the figure. The switch electrically connects the electrically conductive bonding part 20 and the electric cell group 10 in series, that is, forms an electrolytic glue loop. The electric cell group 10 is used to provide electric energy in the electrolytic glue loop. That is, the electrolytic glue loop can be controlled to have no current passing through by controlling the switch to be open, and the electrolytic glue loop can be controlled to have current passing through by controlling the switch to be closed. The electrically conductive bonding part 20 has the following characteristics: in the case where there is no current passing through the electrically conductive bonding part 20, the electrically conductive bonding part 20 has a certain adhesion effect; and in the case where there is current passing through the electrically conductive bonding part 20, the electrically conductive bonding part 20 loses the adhesion effect. Based on the properties of the electrically conductive bonding part 20, in the process of disassembling the battery, the electrically conductive bonding part 20 can be controlled to pass current by controlling the switch to be closed, so that the electrically conductive bonding part 20 loses the adhesion effect, thereby separating the electric cell group 10 and the first glue shell 40 from the position of the electrically conductive bonding part 20, realizing the operation of quickly and simply disassembling the electric cell, and effectively avoiding the damage of the electric cell 10 and the first glue shell 40 in the disassembling process.

[0042] The electric core assembly structure provided by the embodiment of the utility model, the electric core group and the first glue shell are fixed by the conductive bonding part, the conductive bonding part is connected with the protection circuit board, and the switch is arranged on the protection circuit board. The switch is electrically connected with the conductive bonding part and the electric core group, thereby forming an electrolytic glue loop. In the process of disassembling the battery, the electrolytic glue loop is turned on by controlling the switch to be closed, and the electric core group provides current for the electrolytic glue loop. After the current passes through the conductive bonding part for a period of time, the inside of the conductive bonding part loses the adhesion effect, thereby the electric core group and the first glue shell can be separated quickly and conveniently. Compared with the mode that the double-sided adhesive tape is used to bond the electric core and the shell in the related art, tools such as a glue separating agent and a disassembling sheet need to be used when the battery is disassembled, and the aluminum plastic film of the electric core and the shell are easily damaged, and the electric core assembly structure provided by the embodiment of the utility model can effectively avoid damage to the electric core and the first glue shell in the disassembling process.

[0043] Optionally, Figure 2 is an explosion view of another electric core assembly structure provided by the embodiment of the utility model. Based on the above embodiment, as shown in Figure 2 , the conductive bonding part 20 comprises a first conductor layer 21, an electrolytic glue layer 22 and a second conductor layer 23 which are arranged in layers.

[0044] The first conductor layer 21 is arranged on one side of the electrolytic glue layer 22 close to the electric core group 10, and the second conductor layer 23 is arranged on the other side of the electrolytic glue layer 22 away from the electric core group 10; the second conductor layer 23 is adhesively connected with the first glue shell 40; the first end of the protection circuit board 30 is electrically connected with the first conductor layer 21, and the second end of the protection circuit board 30 is provided with a conductive contact part 31 which is electrically connected with the second conductor layer 23.

[0045] Specifically, the electrolytic glue has good adhesion and retention in the state before being powered on, and after being powered on for a short time, the adhesion of one side of the adhesive tape is reduced, so that the electrolytic glue can be easily peeled off from the adherend. The first conductor layer 21 and the second conductor layer 23 are arranged on the upper and lower sides of the electrolytic glue layer 22, and the protection circuit board 30 is electrically connected with the first conductor layer 21, and the first conductor layer 21 is electrically connected with the second conductor layer 23 through the conductive contact part 31 arranged on the protection circuit board 30, thereby forming an electrolytic glue loop. When the switch is in the closed state, the current provided by the electric core group 10 flows through the first conductor layer 21 and the second conductor layer 23, so that the current passes through the electrolytic glue layer 22. After the electrolytic glue layer 22 is powered on for a short time, the adhesion of the electrolytic glue layer 22 is reduced, so that the electric core group 10 and the first glue shell 40 can be easily separated from the position of the electrolytic glue layer 22, and damage to the electric core group 10 and the first glue shell 40 in the process of disassembling the battery is effectively avoided.

[0046] Optionally, Figure 3 is an assembly structure schematic view of an electric core assembly structure provided by the embodiment of the utility model,Figure 4 is Figure 3 an enlarged structure diagram in the dashed circle. On the basis of the above-mentioned embodiments, in combination with Figures 2 to 4 , the first conductor layer 21 and the second conductor layer 23 are provided with first ends and second ends close to the tab side of the battery cell group 10.

[0047] The first conductive connecting part 211 is provided at the first end of the first conductor layer 21, and the first conductive connecting part 211 is an integral structure with the first conductor layer 21; the first conductive connecting part 211 includes a first plane 212, a second plane 213 and a bending part 214; the first plane 212 is located in the same plane as the first conductor layer 21, the second plane 213 is located in a different plane from the first conductor layer 21, and the second plane 213 is connected to the first plane 212 through the bending part 214.

[0048] The second conductive connecting part 221 is provided at the second end of the second conductor layer 23, and the second conductive connecting part 221 is an integral structure with the second conductor layer 23, and the second conductive connecting part 221 is located in the same plane as the second conductor layer 23.

[0049] The orthogonal projection of the first conductive connecting part 211 on the battery cell group 10 and the orthogonal projection of the second conductive connecting part 221 on the battery cell group 10 are staggered.

[0050] Specifically, the first conductor layer 21 and the second conductor layer 23 are electrically connected at the tab side of the battery cell group 10, wherein the first conductive connecting part 211 provided by the first conductor layer 21 and the second conductive connecting part 221 provided by the second conductor layer 23 are respectively located at the opposite first end and second end, therefore, the first conductive connecting part 211 and the second conductive connecting part 221 are staggered.

[0051] The second conductive connecting part 221 is arranged outside the edge of the second end of the second conductor layer 23 and is in the same plane with the second conductor layer 23. The second conductive connecting part 221 is arranged outside the edge of the second conductor layer 23 and provides a position for electrically connecting with the first conductor layer 21. Since the battery cell group 10 has a certain thickness and the first conductor layer 21 needs to be electrically connected with the tab of the battery cell group 10, the tab of the battery cell group 10 and the first conductor layer 21 are in different planes, and the first conductive connecting part 211 arranged outside the edge of the first end of the first conductor layer 21 is in a bent shape. The first conductive connecting part 211 includes a first plane 212, a second plane 213 and a bent part 214 connecting the first plane 212 and the second plane 213. The first plane 212 and the second plane 213 connected by the bent part 214 are in different planes, wherein the first plane 212 is in the same plane with the first conductor layer 21, and the second plane 213 is in the same plane with the tab of the battery cell group 10, so that the first conductor layer 21 can be electrically connected with the tab of the battery cell group 10 through the first conductive connecting part 211.

[0052] Optionally, based on the above-mentioned embodiments, continuing to refer to Figures 2 to 4 , the first end of the protection circuit board 30 is electrically connected with the first conductive connecting part 211; and the second end of the protection circuit board 30 is in contact with the second conductive connecting part 221 through the conductive contact part 31, so that the first conductor layer 21 is electrically connected with the second conductor layer 23.

[0053] Specifically, the second plane 213 in the first conductive connecting part 211 is in the same plane with the protection circuit board 30, so that the first conductor layer 21 can be directly electrically connected with the protection circuit board 30 through the first conductive connecting part 211, and the second conductive connecting part 221 of the second conductor layer 23 is in contact with the conductive contact part 31 arranged on the protection circuit board 30 to realize electrical connection, so that the first conductor layer 21 is electrically connected with the second conductor layer 23 through the protection circuit board 30. Exemplarily, the conductive contact part 31 includes any one of conductive foam, conductive plastic and conductive rubber. In addition, the positive tab and the negative tab of the battery cell group 10 are also electrically connected with the protection circuit board 30, so that an electrolytic glue loop can be formed.

[0054] Optionally, Figure 5 is an explosion view of another battery cell assembly structure provided by the embodiment of the present application. Based on the above-mentioned embodiments, as shown in Figure 5 , the conductive bonding part 20 further includes an insulating glue layer 24.

[0055] The insulating glue layer 24 is arranged on the side of the first conductor layer 21 away from the electrolytic glue layer 22, and the insulating glue layer 24 is used for insulating the battery cell group 10 from the conductive bonding part 20.

[0056] Specifically, since the electric cell group 10 and the conductive bonding part 20 are both conductive, an insulating adhesive layer 24 is arranged between the electric cell group 10 and the conductive bonding part 20, so that the electric cell group 10 and the conductive bonding part 20 are insulated, and the normal working performance of the battery is ensured. And the tab of the electric cell group 10 and the first conductor layer 21 and the second conductor layer 23 in the conductive bonding part 20 are only electrically connected through the protection circuit board 30, forming an electrolytic adhesive loop, so that the electrolytic adhesive layer 22 is powered on when the battery is disassembled, so that it loses the adhesion.

[0057] Optionally, on the basis of each of the above embodiments, the protection circuit board 30 is further provided with a resistor; the resistor is electrically connected between the switch and the electric cell group 10.

[0058] Specifically, since the electrolytic adhesive loop has a certain internal resistance, a resistor can be arranged between the switch and the electric cell group 10, and a resistor with a suitable resistance value can be selected according to the actual line condition, so as to regulate the current in the electrolytic adhesive loop. Figure 6 is the equivalent circuit diagram of the electrolytic adhesive loop provided by the embodiment of the utility model. As shown in Figure 6 , the switch 01, the positive electrode tab (or negative electrode tab) 02 of the electric cell group 10, the first conductor layer 21, the electrolytic adhesive layer 22, the second conductor layer 23, the negative electrode tab (or positive electrode tab) 03 of the electric cell group 10, the electric cell group 10 and the resistor 04 are connected in series to form an electrolytic adhesive loop. When the switch 01 is in the open state, the electric cell group 10 does not deliver current to the electrolytic adhesive loop, therefore, the electrolytic adhesive layer 22 has no current flowing through it; when the switch 01 is in the closed state, the electric cell group 10 delivers current to the electrolytic adhesive loop, therefore, the electrolytic adhesive layer 22 has current flowing through it.

[0059] Optionally, on the basis of each of the above embodiments, continuing to refer to Figure 5 , the electric cell assembly structure further comprises: a second adhesive shell 50.

[0060] The second adhesive shell 50 is located on the side of the electric cell group 10 away from the first adhesive shell 40, and the second adhesive shell 50 is connected with the first adhesive shell 40 in a cover-hinged manner to form a cavity; the cavity is used to accommodate the electric cell group 10 and the conductive bonding part 20.

[0061] Specifically, the second adhesive shell 50 can be cover-hinged with the first adhesive shell 40 to form a sealed cavity to seal the electric cell group 10 and the conductive bonding part 20 inside. It should be noted that the second adhesive shell 50 is not fixed to the surface of the electric cell group 10, but is only fixed by cover-hinging with the first adhesive shell 40, so that during the disassembly of the battery, the second adhesive shell 50 can be first lifted off, and then the switch provided on the protection circuit board 30 is pressed, so that the electrolytic adhesive loop is conducted.

[0062] The utility model embodiment further provides a battery module. The battery module comprises the cell assembly structure provided by any of the above embodiments, has the similar beneficial effect with the cell assembly structure, and here is not repeated.

[0063] The utility model embodiment further provides a battery pack, the battery pack comprises a shell and at least one battery module provided by the above embodiment, and the shell is wrapped outside at least one battery module to protect at least one battery module from being damaged.

[0064] The above specific embodiment does not constitute the limitation to the protection scope of the utility model. It should be understood by the person skilled in the art that various modifications, combinations, sub-combinations and substitutions can be carried out according to the design requirement and other factors. Any modification, equivalent substitution and improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery cell assembly structure, characterized in that, The application relates to an electric cell assembly structure. The electric cell assembly structure comprises an electric cell group, a conductive bonding part, a protection circuit board and a first glue shell. The electric cell group comprises at least one electric cell, and each electric cell is arranged in a laminated mode along the thickness direction of the electric cell group; the first glue shell is arranged on one side of the electric cell group in the thickness direction. The conductive bonding part is arranged between the electric cell group and the first glue shell, and is used for bonding and fixing the first glue shell and the electric cell group. The protection circuit board is provided with a switch, the switch is electrically connected with the conductive bonding part and the electric cell group, and an electrolytic glue loop is formed.

2. The battery cell assembly structure according to claim 1, wherein The conductive bonding part comprises a first conductor layer, an electrolytic glue layer and a second conductor layer arranged in a laminated mode. The first conductor layer is arranged on one side of the electrolytic glue layer close to the electric cell group, the second conductor layer is arranged on one side of the electrolytic glue layer away from the electric cell group, and the second conductor layer is adhesively connected with the first glue shell. The first end of the protection circuit board is electrically connected with the first conductor layer, and the second end of the protection circuit board is provided with a conductive contact part electrically connected with the second conductor layer.

3. The battery cell assembly structure according to claim 2, wherein The first conductor layer and the second conductor layer are provided with first ends and second ends close to the lug side of the electric cell group. The first end of the first conductor layer is provided with a first conductive connecting part which is an integral structure with the first conductor layer; the first conductive connecting part comprises a first plane, a second plane and a bending part; the first plane is located in the same plane as the first conductor layer, the second plane is located in a different plane from the first conductor layer, and the second plane is connected with the first plane through the bending part. The second end of the second conductor layer is provided with a second conductive connecting part which is an integral structure with the second conductor layer and is located in the same plane as the second conductor layer. The orthographic projection of the first conductive connecting part on the electric cell group and the orthographic projection of the second conductive connecting part on the electric cell group are staggered.

4. The battery cell assembly structure according to claim 3, wherein The first end of the protection circuit board is electrically connected with the first conductive connecting part. The second end of the protection circuit board is in contact with the second conductive connecting part through the conductive contact part, so that the first conductor layer and the second conductor layer are electrically connected.

5. The battery cell assembly structure according to claim 2, wherein The conductive contact part comprises any one of conductive foam, conductive plastic and conductive rubber.

6. The battery cell assembly structure according to claim 2, wherein The conductive bonding part further comprises an insulating glue layer. The insulating glue layer is arranged on one side of the first conductor layer away from the electrolytic glue layer, and is used for insulating the electric cell group and the conductive bonding part.

7. The battery cell assembly structure according to claim 1, wherein The protection circuit board is further provided with a resistor. The resistor is electrically connected between the switch and the electric cell group.

8. The battery cell assembly structure according to claim 1, wherein The application further relates to a second glue shell. The second glue shell is located on one side of the electric cell group away from the first glue shell, is connected with the first glue shell in a cover-hinge mode and forms a cavity. The cavity is used for accommodating the electric cell group and the conductive bonding part. The application relates to an electric cell assembly structure.

9. A battery module, characterized by The application relates to an electric cell assembly structure.

10. A battery pack, characterized by, The application relates to an electric cell assembly structure.

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