Ultrathin series battery cell structure and battery

Abstract

The utility model belongs to the technical field of batteries, and mainly relates to an ultrathin series battery cell structure which comprises a first battery cell, a second battery cell and a protection plate for connecting the first battery cell and the second battery cell in series, the protection plate comprises a plate body, an input end and an output end, wherein the input end and the output end are arranged on the plate body. The input end comprises a first input area and a second input area. The first input area comprises a first input terminal and a second input terminal, and the second input area comprises a third input terminal; the third input terminal is used for connecting the first battery cell and the second battery cell in series, the first input terminal is connected with the first battery cell, and the second input terminal is connected with the second battery cell; therefore, according to the battery cell structure, two groups of input ends which are originally arranged are integrated into one group of input ends, so that the connection point is more compact, and the connection width between the protection plate and the battery cell is reduced. Due to the design, the overall width of the battery is effectively shortened, and the risk of exposing the tabs of the battery cell is also reduced; meanwhile, the utility model further comprises the battery comprising the battery cell structure, and the battery performance is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a kind of ultra-thin series connection electric core structure and battery. BACKGROUND

[0002] With the rapid development of technology, the types and functions of 3C (computer, communication, consumer electronics) products such as mobile phones, tablet computers and digital cameras are increasing. Consumers have higher and higher requirements for the portability and aesthetics of devices, which directly leads to stringent requirements for the width of the battery. 2S1P (two series) battery structure has good energy density and relatively small volume, which can effectively meet the dual needs of battery performance and width on the market. While meeting the normal operation of the device, the 2S1P architecture enables the battery to provide higher voltage and improve the overall performance of the device, so it becomes an alternative for the widespread application of 3C consumer electronics products.

[0003] Although the 2S1P battery has certain advantages in design, there are still many problems in actual production process. In battery production, especially in the injection molding link, the double-pole lug (electrode connection part) of the electric core of the 2S1P battery may be exposed due to mold design or uneven material flow. This not only affects the overall aesthetics of the battery, but also may cause short circuit accidents. In addition, once the double-pole lug is exposed, the battery may come into contact with conductive substances during use or storage, which may cause short circuit and thus pose a threat to the device and user safety.

[0004] Therefore, the electric core structure of the existing 2S1P battery and the battery are further improved to solve the technical defects of the prior art. UTILITY MODEL CONTENTS

[0005] One of the purposes of the utility model is to provide an electric core structure of a 2S1P battery that can reduce the risk of short circuit in view of the deficiencies of the prior art.

[0006] In order to achieve the above technical purpose, the following technical solutions are implemented in the present application:

[0007] An ultra-thin series connection electric core structure includes a first electric core, a second electric core, and a protection plate that connects the first electric core and the second electric core in series.

[0008] The protection plate includes a plate body, an input end and an output end provided on the plate body, the input end includes a first input area and a second input area; the first input area includes a first input terminal and a second input terminal, and the second input area includes a third input terminal;

[0009] The third input terminal is used to connect the first electric core and the second electric core in series, the first input terminal is connected with the first electric core, and the second input terminal is connected with the second electric core.

[0010] The above technical solution has the following technical effects:

[0011] The above technical solution of the present application integrates the originally arranged two groups of input terminals into one group of input terminals, making the connection points more compact, thereby reducing the connection width between the protection plate and the battery cell. This design effectively shortens the overall width of the battery and reduces the risk of exposure of the battery cell tabs. In addition, by optimizing the battery cell structure design, it is ensured that the double tabs of the battery cell will not be exposed during the injection molding process, so that they are completely hidden after the glue sealing, thereby avoiding the risk of external short circuit. This improvement will greatly improve the safety of the battery. At the same time, the design of the present application integrates the input terminals while keeping the structure of the other group of input terminals unchanged, ensuring that the performance and reliability of the battery will not be affected.

[0012] As a further improvement of the ultra-thin series connection battery cell structure of the present application, the first battery cell includes a first body and a first positive tab and a first negative tab extending from the first body;

[0013] The second battery cell includes a second body and a second positive tab and a second negative tab extending from the second body;

[0014] The third input terminal connects the first positive tab and the second negative tab or connects the second positive tab and the first negative tab.

[0015] As a further improvement of the ultra-thin series connection battery cell structure of the present application, when the first input terminal connects the first positive tab, the second input terminal connects the second negative tab;

[0016] When the first input terminal connects the first negative tab, the second input terminal connects the second positive tab.

[0017] As a further improvement of the ultra-thin series connection battery cell structure of the present application, the width of the first input area is greater than the width of the plate body.

[0018] As a further improvement of the ultra-thin series connection battery cell structure of the present application, the width of the second input area is equal to the width of the plate body.

[0019] As a further improvement of the ultra-thin series connection battery cell structure of the present application, the output terminal includes at least one output electrode.

[0020] As a further improvement of the ultra-thin series connection battery cell structure of the present application, along the thickness direction of the plate body, the output terminal is arranged on the side away from the input terminal.

[0021] As a further improvement of the ultra-thin series connection battery cell structure of the present application, the first input terminal and the second input terminal are arranged along the width direction of the plate body.

[0022] As a further improvement of the utility model discloses a kind of ultra-thin series connection battery cell structure, first battery cell and protective plate junction are provided with top seal glue;

[0023] Second battery cell and protective plate junction are provided with top seal glue.

[0024] The second purpose of the utility model is to provide a 2S1P battery structure that can reduce the risk of short circuit.

[0025] To achieve the above technical purpose, the present application implements the following technical solutions:

[0026] A battery includes a housing for assembling a battery cell structure and the battery cell structure as described above.

[0027] The above technical solutions achieve the following technical effects:

[0028] The present application optimizes the design of the protective plate in the battery, achieving the technical effect of significantly improving the safety and reliability of the battery while ensuring high performance. Specifically, the compact input end design not only reduces the overall size of the battery, but also effectively prevents the exposure of the battery cell tabs, thereby avoiding potential short circuit risks. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the utility model, and form a part of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0030] Figure 1 It is a schematic diagram of the ultra-thin battery cell structure in embodiment 1 of the utility model;

[0031] Figure 2 It is a schematic diagram of the structure of the protective plate in embodiment 1 of the utility model;

[0032] Figure 3 It is a schematic diagram of the structure of the battery in embodiment 1 of the utility model;

[0033] Figure 4 It is a schematic diagram of the structure of the protective plate in the prior art;

[0034] Figure 5 It is a schematic diagram of the structure of the battery in the prior art;

[0035] Among them:

[0036] 1-first battery cell;

[0037] 11-first body;

[0038] 12-first positive tab;

[0039] 13 - first negative tab;

[0040] 2 - second cell;

[0041] 21 - second body;

[0042] 22 - second positive tab;

[0043] 23 - second negative tab;

[0044] 3 - protection plate;

[0045] 31 - plate body;

[0046] 32 - input end;

[0047] 321 - first input area;

[0048] 3211 - first input terminal;

[0049] 3212 - second input terminal;

[0050] 322 - second input area;

[0051] 3221 - third input terminal;

[0052] 33 - output end;

[0053] 331 - output electrode;

[0054] 4 - top sealant;

[0055] 5 - shell;

[0056] 51 - hole site. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work under the premise, belong to the scope of protection of the present application. Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0058] In the description of the utility model, unless another definite provision and limitation, the term "installation" "link" "connection" "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or become an integral whole; can be mechanical connection, also can be electrical connection; can be direct connection, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the above-mentioned terms can be understood in the specific meaning in the utility model according to specific circumstances.

[0059] Although the present application is disclosed with the preferred embodiments, it is not intended to limit the claims, any person skilled in the art can make several possible changes and modifications without departing from the concept of the present application, therefore the protection scope of the present application should be limited by the scope defined by the claims of the present application.

[0060] The utility model will be described in further detail in combination with specific implementation, but the implementation of the utility model is not limited to this.

[0061] Embodiment 1

[0062] As Figures 1-5 As Figure 4 It can be seen that the prior art protection plate 3 is provided with two first input areas 321, and each first input area 321 is provided with a first input terminal 3211 and a second input terminal 3212 for connecting the opposite polarities. In specific practical applications, the protection plate 3 is provided with corresponding circuits inside the plate body 31, and the connection between the first input terminal 3211 and the second input terminal 3212 can make the two battery cells connected in series. However, in the structure of the above-mentioned protection plate 3, the solder pad serving as the first input terminal 3211 and the second input terminal 3212 will have a width greater than the width of the plate body 31 in order to better realize the function of inputting the power of the battery cell (i.e., fully connecting with the pole lug of the battery cell). When the width of the solder pad is too large, only the top rubber frame position in the battery shell 5 assembled with the battery cell can be improved to have two hole positions 51 capable of accommodating the protruding solder pads of the above-mentioned protection plate 3. However, the above-mentioned design will cause the risk of short circuit between the battery cell and the connection part of the protection plate 3 due to the exposure of the pole lug before the battery cell is subjected to injection molding.

[0063] To solve the technical problems and defects of the above-mentioned technical problems, the application improves the structure of the battery cell. Specifically, a super-thin series battery cell structure includes a first battery cell 1, a second battery cell 2, and a protection plate 3 connected in series with the first battery cell 1 and the second battery cell 2; the protection plate 3 includes a plate body 31 and an input end 32 and an output end 33 arranged on the plate body 31, the input end 32 includes a first input area 321 and a second input area 322; the first input area 321 includes a first input terminal 3211 and a second input terminal 3212, and the second input area 322 includes a third input terminal 3221; the third input terminal 3221 is used to connect the first battery cell 1 and the second battery cell 2 in series, the first input terminal 3211 is connected with the first battery cell 1, and the second input terminal 3212 is connected with the second battery cell 2.

[0064] Specifically, the principle of the above technical solution is to optimize the connection mode of the first battery cell 1, the second battery cell 2 and the protection plate 3, so that the series connection between the battery cells is more compact, and the number and exposed area of the connection points are reduced. This design not only improves the overall structural stability of the battery, but also further reduces the risk of short circuit caused by too many connection points. At the same time, the original input end 32 needs to be connected to the first battery cell 1 and the second battery cell 2, and the internal circuit of the protection plate 3 plate body 31 is used to realize the series connection of the first battery cell 1 and the second battery cell 2. The above design of the application improves this structure. Among them, the third input terminal 3221 can simultaneously connect the electrodes with opposite polarity in the first battery cell 1 and the second battery cell 2, thereby realizing the series connection of the first battery cell 1 and the second battery cell 2. Therefore, only the other electrodes of the first battery cell 1 and the second battery cell 2 need to be connected to the protection plate 3, and the protection plate 3 can control the electric energy of the first battery cell 1 and the second battery cell 2 to be output to the power consumption equipment through the output end 33. As can be seen, the improvement of the battery cell structure in the application reduces the number of connection points and optimizes the design of the protection plate 3, further improving the overall performance and safety of the battery. Specifically, the compact input end 32 design not only reduces the overall size of the battery, but also reduces the risk of electrode tab exposure, thereby effectively avoiding potential short circuit problems.

[0065] Further, the first battery cell 1 includes a first body 11, a first positive electrode tab 12 and a first negative electrode tab 13 extending from the first body 11, and the second battery cell 2 includes a second body 21, a second positive electrode tab 22 and a second negative electrode tab 23 extending from the second body 21. The third input terminal 3221 is connected to the first positive electrode tab 12 and the second negative electrode tab 23 or connected to the second positive electrode tab 22 and the first negative electrode tab 13. (The tab is a specific embodiment of the above-mentioned electrode) Thus, when the third input terminal 3221 is connected to the first positive electrode tab 12 and the second negative electrode tab 23, the first input terminal 3211 is connected to the first negative electrode tab 13, and the second input terminal 3212 is connected to the second positive electrode tab 22. Conversely, when the third input terminal 3221 is connected to the second positive electrode tab 22 and the first negative electrode tab 13, the first input terminal 3211 is connected to the first positive electrode tab 12, and the second input terminal 3212 is connected to the second negative electrode tab 23. This connection mode not only ensures the effective series connection between the battery cells, but also further optimizes the current distribution inside the battery, improving the overall performance of the battery.

[0066] Further, when the first input terminal 3211 is connected to the first positive electrode tab 12, the second input terminal 3212 is connected to the second negative electrode tab 23; when the first input terminal 3211 is connected to the first negative electrode tab 13, the second input terminal 3212 is connected to the second positive electrode tab 22. In addition, in the specific implementation process, the input terminal 32 and the output terminal 33 of the protection plate 3 are both high-precision welding processes, which ensure the stability and reliability of the connection points. The design of the output electrode 331 is also optimized to provide stable current output to meet the needs of different electrical equipment.

[0067] Embodiment 2

[0068] As shown in Figures 1-5 Unlike embodiment 1, in order to further improve the risk of battery cell tab leakage and at the same time ensure the stability of the series connection of the battery cells, the width of the first input area 321 is greater than the width of the plate body 31. Thus, a sufficient gap is provided between the first input terminal 3211 and the second input terminal 3212 in the first input area 321 to prevent contact between them. Considering that the third input terminal 3221 has already connected the first battery cell 1 and the second battery cell 2 in series, when the first input terminal 3211 and the second input terminal 3212 are in contact or the tab connected to the first input terminal 3211 and the tab connected to the second input terminal 3212 are in contact, a short circuit will occur between the first battery cell 1 and the second battery cell 2. Thus, the width of the first input area 321 is set to be greater than the width of the plate body 31, so that when the gap between the first input terminal 3211 and the second input terminal 3212 is large enough, the risk of short circuit caused by contact can be effectively avoided.

[0069] Further, the first input terminal 3211 and the second input terminal 3212 are arranged along the width direction of the plate body 31. In this way, the distance between the first input terminal 3211 and the second input terminal 3212 is increased, further reducing the possibility of short circuit caused by contact. In addition, this design also facilitates accurate positioning of the battery cell during injection molding, ensuring that the connection between the battery cell and the protection plate 3 is firm and reliable.

[0070] Further, the width of the second input area 322 is equal to the width of the plate body 31. In this way, the third input terminal 3221 in the second input area 322 is aligned with the edge of the plate body 31 or arranged inside the plate body 31, ensuring the compactness and stability of the battery cell connection. This design not only simplifies the assembly process of the battery, but also further reduces production costs while avoiding the risk of tab exposure. In addition, the output end 33 is arranged on the side away from the input end 32, effectively avoiding interference between the input end 32 and the output end 33, and improving the overall electrical performance of the battery.

[0071] In the specific implementation process, the design of the output end 33 is also optimized, and the output end 33 includes at least one output electrode 331 to ensure that the number and layout of the output electrode 331 can meet the needs of different electrical equipment. At the same time, along the thickness direction of the plate body 31, the output end 33 is arranged on the side away from the input end 32, avoiding interference between the input and output, and improving the efficiency of current transmission. At the same time, the first input terminal 3211 and the second input terminal 3212 are arranged along the width direction of the plate body 31, further optimizing the space utilization of the protection plate 3.

[0072] In addition, in order to further improve the safety of the battery, the first battery cell 1 and the protection plate 3 are connected, and the second battery cell 2 and the protection plate 3 are connected. The top sealant 4 is arranged at the connection. This top sealant 4 not only can effectively prevent the exposure of the battery cell tab, but also can play a good insulation role during the use of the battery, further reducing the risk of short circuit.

[0073] Other than the same as embodiment 1, this embodiment will not be described again.

[0074] Embodiment 3

[0075] As shown in Figures 1-5 Unlike embodiment 1, in order to reduce the risk of short circuit during the preparation process of the existing 2S1P battery structure, the existing 2S1P battery structure is improved. The traditional 2S1P battery structure is as shown in Figure 5As shown, the top sealing area has two hole positions 51 for the protruding part of the protection plate 3. The battery of the present application comprises the shell 5 for assembling the battery cell structure and any of the above-mentioned battery cell structures. Therefore, the present application can reduce the hole positions 51 to one, thereby optimizing the traditional 2S1P battery structure.

[0076] Other than the same as Embodiment 1, this embodiment will not be repeated.

[0077] The above only is the preferred embodiment of the present application, and is not used to limit the present application, and for the person skilled in the art, the present application can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultra-thin series-connected battery cell structure, characterized in that, It includes a first battery cell (1), a second battery cell (2), and a protection board (3) that connects the first battery cell (1) and the second battery cell (2) in series; The protection board (3) includes a board body (31) and an input terminal (32) and an output terminal (33) disposed on the board body (31). The input terminal (32) includes a first input area (321) and a second input area (322). The first input area (321) includes a first input terminal (3211) and a second input terminal (3212). The second input area (322) includes a third input terminal (3221). The third input terminal (3221) is used to connect the first battery cell (1) and the second battery cell (2) in series. The first input terminal (3211) is connected to the first battery cell (1), and the second input terminal (3212) is connected to the second battery cell (2).

2. The ultra-thin series-connected battery cell structure according to claim 1, characterized in that, The first battery cell (1) includes a first body (11) and a first positive electrode tab (12) and a first negative electrode tab (13) extending from the first body (11); The second battery cell (2) includes a second body (21) and a second positive electrode tab (22) and a second negative electrode tab (23) extending from and disposed on the second body (21); The third input terminal (3221) is connected to the first positive electrode (12) and the second negative electrode (23) or to the second positive electrode (22) and the first negative electrode (13).

3. The ultra-thin series-connected cell structure according to claim 2, characterized in that, When the first input terminal (3211) is connected to the first positive electrode tab (12), the second input terminal (3212) is connected to the second negative electrode tab (23); When the first input terminal (3211) is connected to the first negative electrode tab (13), the second input terminal (3212) is connected to the second positive electrode tab (22).

4. The ultra-thin series-connected cell structure according to claim 1, characterized in that, The width of the first input area (321) is greater than the width of the plate (31).

5. The ultra-thin series-connected cell structure according to claim 1, characterized in that, The width of the second input area (322) is equal to the width of the plate (31).

6. The ultra-thin series-connected cell structure according to claim 1, characterized in that, The output terminal (33) includes at least one output electrode (331).

7. The ultra-thin series-connected cell structure according to claim 1, characterized in that, Along the thickness direction of the plate (31), the output end (33) is disposed on the side away from the input end (32).

8. The ultra-thin series-connected cell structure according to claim 1, characterized in that, The first input terminal (3211) and the second input terminal (3212) are arranged along the width direction of the plate (31).

9. The ultra-thin series-connected cell structure according to claim 1, characterized in that, A top sealant (4) is provided at the connection between the first battery cell (1) and the protection board (3); A top sealant (4) is provided at the connection between the second cell (2) and the protection board (3).

10. A battery, characterized in that, It includes a housing (5) for assembling the battery cell structure and the battery cell structure as described in any one of claims 1-9.

Images