CN216145653U

CN216145653U - Battery core subassembly and battery

Info

Publication number: CN216145653U
Application number: CN202120371823.0U
Authority: CN
Inventors: 张男; 唐阳
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-03-29
Anticipated expiration: 2031-02-08

Abstract

The application provides a battery core subassembly and battery relates to the battery field. The electric core assembly comprises at least two electric cores. Each battery cell is provided with two lugs with opposite polarities, and in any two adjacent battery cells, the two lugs with the same polarity are electrically connected with the corresponding pole columns through the adapter sheet to form a connecting assembly. In every group coupling assembling, form the electrical property assembly district between every utmost point ear and the switching piece, one side that the electrical property assembly district deviates from utmost point post is equipped with first insulating glue, and one side that the electrical property assembly district faces utmost point post is equipped with the second insulating glue. The two electrical assembly areas are connected together through a first insulating adhesive, and/or the two electrical assembly areas are connected together through a second insulating adhesive. The arrangement can ensure that the integrity of two connected lugs with the same polarity is better, and the broken lugs cannot directly fall down and are inserted into the battery core or prop against the shell.

Description

Battery core subassembly and battery

Technical Field

The application relates to the field of batteries, in particular to an electric core assembly and a battery.

Background

Square aluminum hull battery, utmost point ear welding back rubberizing protection can cover the relative seal of welding of the main part of electric core and electric core, so the insulating glue can separate the main part of seal and electric core of welding, avoids welding the main part or the kink that the seal damaged electric core in the assembly of battery and use, improves the security performance of electric core.

The existing rubberizing only reaches the root part of the lug from the lug, and after the lug is broken, the rubberizing has the risk of being inserted into the battery cell and propping against the shell.

SUMMERY OF THE UTILITY MODEL

It is an object of embodiments of the present application to provide an electric core assembly and a battery, which can improve at least one of the above technical problems.

In a first aspect, an embodiment of the present application provides a battery cell assembly, which includes at least two battery cells.

Each battery cell is provided with two lugs with opposite polarities, and in any two adjacent battery cells, the two lugs with the same polarity are electrically connected with the corresponding pole columns through the adapter sheet to form a connecting assembly.

In every group coupling assembling, form the electrical property assembly district between every utmost point ear and the switching piece, one side that the electrical property assembly district deviates from utmost point post is equipped with first insulating glue, and one side that the electrical property assembly district faces utmost point post is equipped with the second insulating glue.

The two electrical assembly areas are connected together through a first insulating adhesive, and/or the two electrical assembly areas are connected together through a second insulating adhesive.

In the realization process, compared with the mode of independently setting the insulating glue from the pole lug to the pole lug root in each electric assembly area, the mode that the electric assembly areas are connected together through the first insulating glue and/or the second insulating glue is utilized, and the integrity of two connected pole lugs with the same polarity can be better on the premise of ensuring the insulating effect.

At the moment, even if any one of the pole lugs is broken, the first insulating glue and/or the second insulating glue are attached to the first insulating glue and/or the second insulating glue, so that the first insulating glue and/or the second insulating glue have a certain limiting effect on the broken pole lug on the premise that the other pole lug is not broken, and the broken pole lug cannot directly fall off and be inserted into the battery cell or jack the shell.

Due to the fact that in the actual using process, when two tabs are simultaneously broken, the risk of inserting into the cell and jacking to the shell still exists.

In a possible embodiment, therefore, in each group of connecting elements, the two electrical assembly areas are connected together by a first insulating glue, and the first insulating glue is connected to at least one cell.

Under the above-mentioned setting, can make comparatively stable the setting in electric core of first insulation glue, even two utmost point ears fracture this moment, first insulation glue still can directly not break away from electric core, and then guarantees to bond two cracked utmost point ears that bond at first insulation glue and can directly not drop, has avoided the problem that the utmost point ear that drops inserted electric core from this, improves the security of electric core.

In a possible embodiment, two ends of the first insulating glue are respectively connected with two battery cores.

Through the setting, the stability that first insulation glue and electric core are connected is further improved, even two utmost point ears all fracture this moment, also can guarantee that two utmost point ears are stable to be born by first insulation glue, guarantee that the relative position relation between cracked utmost point ear and the electric core is unchangeable, effectively avoid cracked electric core to insert electric core.

In a possible embodiment, each cell has a mounting surface, the tabs are arranged on the mounting surface, any two adjacent cells are oppositely arranged with the mounting surfaces opposite, and at least one end of the first insulating glue is connected with the mounting surface.

Optionally, each battery cell has a lower surface connected with the mounting surface, the lower surface is located on one side of the battery cell departing from the pole, and at least one end of the first insulating glue is sequentially connected with the mounting surface and the lower surface.

Through above-mentioned two kinds of mode of setting up, the purpose that first insulating glue and electric core are connected can all be realized.

In a possible embodiment, in each group of connecting assemblies, the two electrical assembly regions are connected together by a second insulating glue, and the second insulating glue is connected with at least one battery cell.

Under the above-mentioned setting, can make comparatively stable the setting in electric core of second insulating cement, even two utmost point ears fracture this moment, the second insulating cement still can directly not break away from electric core, and it has certain limiting displacement to utmost point ear, and then has avoided utmost point ear top to the shell.

In a possible embodiment, two ends of the second insulating glue are respectively connected with two battery cores.

Through the setting, the stability that the second insulating glue is connected with electric core is further improved, even two utmost point ears all fracture this moment, also can guarantee that two utmost point ears are stable by the restriction of second insulating glue, and the relative position relation between cracked utmost point ear and the electric core is unchangeable, can not push up the shell.

In a possible embodiment, the first insulating glue and the second insulating glue are both insulating adhesive tapes.

In the implementation process, the insulating adhesive tape can be effectively insulated and has certain toughness, so that the bearing effect on the broken tab can be further improved, and the safety of the battery cell is ensured.

In a second aspect, embodiments of the present application provide a battery, which includes a cover plate assembly, and an electric core assembly as provided in the first aspect of the present application, which is engaged with the cover plate assembly.

In the implementation process, the safety performance of the battery cell is improved by using the improvement of the battery cell assembly.

In a possible embodiment, the cover plate comprises a lower insulating member, the lower insulating member is located on one side, close to the pole, of the adapter plate, and the second insulating glue is attached to one side, close to the adapter plate, of the lower insulating member.

In the above-mentioned realization process, based on the position setting of second insulating cement, even go into the shell after electric core closes the core, the utmost point ear fracture or insulating part drop down take place this moment, also can prevent that cracked utmost point ear from pushing up the shell or inserting electric core through the cooperation of second insulating cement and first insulating cement.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of an assembly of an electrical core assembly 200a and a cover plate assembly;

fig. 2 is a schematic view of a first perspective assembly of an interposer and tab;

FIG. 3 is an assembled schematic view of electrical core assembly 200a from a second perspective;

FIG. 4 is an assembled view of electrical core assembly 200b from a second perspective;

fig. 5 is an assembly schematic of the electrical core assembly 200a from a first perspective.

Icon: 100-a cover plate assembly; 110-a lower insulator; 120-a cover plate; 121-pole; 123-liquid injection hole; 125-explosion-proof valve; 200 a-a battery core assembly; 200 b-a battery core assembly; 215-a mounting surface; 216-a tab; 217-patch; 218-first insulating glue; 219-second insulating glue; 220-a first cell; 230-second cell.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the directions or positional relationships indicated by "upper", "lower", and the like are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships which are usually placed when the products of the application are used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed in a specific direction and be operated, and thus, cannot be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

A battery includes a housing, a cover assembly, and an electrical core assembly.

The top of shell is equipped with the opening, and the apron subassembly is sealed to be set up in the opening, and the electric core subassembly sets up in the shell.

Referring to fig. 1, the cover plate assembly 100 includes a lower insulating member 110, a cover plate 120, and two poles 121 with opposite polarities, wherein the cover plate 120 is provided with a liquid injection hole 123 and an explosion-proof valve 125, the lower insulating member 110 is attached to one side of the cover plate 120 close to the electric core assembly 200a, and the two poles 121 are symmetrically disposed on the cover plate 120.

The cell assembly 200a includes a cell, which is formed by winding or laminating a positive tab 216 (not shown), a negative tab 216 (not shown), and a separator (not shown) disposed between the positive tab 216 and the negative tab 216, and the outermost side (i.e., the cell surface) of the cell is the separator.

The battery cell is provided with an upper surface, a lower surface and a side surface, wherein the upper surface and the lower surface are oppositely arranged, and the side surface is connected with the upper surface and the lower surface.

Referring to fig. 2, the battery cell is provided with two tabs 216, wherein one tab 216 is electrically connected to the corresponding positive tab 216, and the other tab is electrically connected to the corresponding negative tab 216, that is, the two tabs 216 have opposite polarities.

The two tabs 216 are provided on the same side surface, and the side surface on which the two tabs 216 are provided serves as the mounting surface 215.

Specifically, two tabs 216 are offset from the mounting surface 215 near one end of the cover plate assembly 100 for subsequent installation.

The number of the battery cells is at least two, wherein in any two adjacent battery cells, two tabs 216 with the same polarity are electrically connected with the corresponding poles 121 through the adapter plate 217 to form a connecting assembly.

In this embodiment, the number of the battery cells is two, and for convenience of description, the battery cells are respectively used as the first battery cell 220 and the second battery cell 230, that is, two sets of connection assemblies are provided between the first battery cell 220 and the second battery cell 230.

Referring to fig. 1 and fig. 2, specifically, the first battery cell 220 and the second battery cell 230 are arranged oppositely, so that the mounting surfaces 215 of the two battery cells are opposite, and the two tabs 216 with the same polarity of the first battery cell 220 and the second battery cell 230 are opposite, at this time, in each group of connection assemblies, the adapter plate 217 is disposed at one side of the two tabs 216 close to the pole 121, the two tabs 216 are electrically connected with the corresponding pole 121 through the adapter plate 217, and at this time, in each group of connection assemblies, an electrical assembly region is formed between each tab 216 and the adapter plate 217.

Specifically, each tab 216 is welded to the interposer 217, wherein the position (i.e., the solder print area) where the tab 216 is welded to the interposer 217 serves as an electrical assembly area.

In order to prevent the tab 216 from being corroded and prevent short circuit caused by corrosion, etc. and improve the safety of the battery, please refer to fig. 1 and fig. 3, a first insulating glue 218 is disposed on a side of the electrical assembly region away from the pole 121, and a second insulating glue 219 is disposed on a side of the electrical assembly region facing the pole 121.

In each set of connecting elements, the two electrical mounting areas are connected together by a first insulating glue 218, and/or the two electrical mounting areas are connected together by a second insulating glue 219. With the above arrangement, the first insulating glue 218 covers two electrical assembly areas at a time, and/or the second insulating glue 219 covers two electrical assembly areas at a time, so that the integrity of two tabs 216 with the same polarity in each group of connecting assemblies is improved, and the situation that any tab 216 directly drops and is inserted into a battery cell after being broken to affect the safety of the battery cell or jack the battery cell to a shell is prevented.

Referring to fig. 3, in each set of connecting elements, two electrical mounting areas are connected together by a first insulating glue 218, and two electrical mounting areas are connected together by a second insulating glue 219.

The first insulating glue 218 may cover and adhere to only the two tabs 216, that is, both ends of the first insulating glue 218 are flush with the roots of the two tabs 216. The second insulating glue 219 may also cover and be adhered to only the two tabs 216, that is, both ends of the second insulating glue 219 are flush with the roots of the two corresponding tabs 216.

In order to improve the cell safety, the first insulating glue 218 is optionally connected to at least one cell, i.e., the first insulating glue 218 covers and adheres to both tabs 216, and the first insulating glue 218 may also be connected to the first cell 220 or to the second cell 230.

In this embodiment, please refer to fig. 3, the first insulating glue 218 is connected to the two battery cells respectively, that is, the first insulating glue 218 not only covers the two tabs 216, but also one end of the first insulating glue 218 is connected to the first battery cell 220, and the other end is connected to the second battery cell 230.

In the practical use process, the adhesion between the insulating glue and the tab 216 is weaker than that between the insulating glue and the battery cell, so that the first insulating glue 218 is stably installed on the two battery cells by using the arrangement, the tab 216 is stably limited, the broken tab 216 is ensured not to generate relative displacement with the battery cell basically under the action of the first insulating glue 218, and the safety of the battery cell is improved.

There are various options for the connection position of the first insulating glue 218 and the battery cell, for example, at least one end of the first insulating glue 218 is connected to the mounting surface 215, or at least one end of the first insulating glue 218 is connected to the mounting surface 215 and the lower surface in sequence.

For example, in each group of connection assemblies, one end of the first insulating glue 218 covers the tab 216 of the first battery cell 220 and extends to the root of the tab 216, and the other end of the first insulating glue 218 extends toward the second battery cell 230 and sequentially covers the tab 216 of the second battery cell 230 and at least part of the mounting surface 215, or in each group of connection assemblies, one end of the first insulating glue 218 covers the tab 216 of the first battery cell 220 and extends to the root of the tab 216, and the other end of the first insulating glue 218 extends toward the second battery cell 230 and sequentially covers the tab 216 of the second battery cell 230, the mounting surface 215 and at least part of the lower surface.

Referring to fig. 4, in the battery core assembly 200b according to another embodiment of the present disclosure, two ends of the first insulating adhesive 218 extend to be connected to the mounting surface 215 of the first battery cell 220 and the mounting surface 215 of the second battery cell 230, respectively.

Referring to fig. 3, in the present embodiment, two ends of the first insulating glue 218 are respectively connected to the lower surfaces of the corresponding battery cells, specifically, after the first insulating glue 218 covers and connects the tabs 216 of two battery cells at one time, one end of the first insulating glue 218 extends to a side away from the tabs 216 and is sequentially connected to the mounting surface 215 of the first battery cell 220 and at least a portion of the lower surface, and the other end extends to a side away from the tabs 216 and is sequentially connected to the mounting surface 215 of the second battery cell 230 and at least a portion of the lower surface. The stability of connection is further improved through the above-mentioned setting, prevents that cracked utmost point ear 216 from breaking away from electric core.

Specifically, referring to fig. 2 and fig. 5, the second insulating glue 219 adheres to and covers the two tabs 216, and the second insulating glue 219 and the first insulating glue 218 are tightly adhered together at the hollowed-out portion of the adaptor plate 217, so as to effectively seal the tabs 216 and prevent the tabs 216 from being corroded.

The second insulating glue 219 is connected to at least one cell.

That is, the second insulating glue 219 may be connected only to the first electrical core 220, or may be connected only to the second electrical core 230, in this embodiment, the second insulating glue 219 is connected to the two electrical cores respectively, in other words, after the second insulating glue 219 covers and bonds to the two solder printing areas to connect the two tabs together, one end of the second insulating glue 219 is connected to the first electrical core 220, and the other end is connected to the second electrical core 230.

Specifically, two ends of the second insulating glue 219 extend to two sides and are connected to the upper surfaces of the first battery cell 220 and the second battery cell 230, so that the connection area is increased as much as possible, and the connection stability is improved. And ensures that even after the tab 216 is broken, the second insulating glue 219 is still stably connected with the first battery cell 220 and the second battery cell 230 and limits the broken tab 216, and in combination with the first insulating glue 218, the second insulating glue 219 can work together to prevent the broken tab 216 from being inserted into the battery cell or pushed to the casing.

At this time, the lower insulating member 110 is located on one side of the interposer 217 close to the pole 121, and one side of the lower insulating member 110 close to the interposer 217 is attached to the second insulating glue 219.

The first insulating glue 218 and the second insulating glue 219 are both insulating adhesive tapes, which not only facilitates the gluing, but also has good adhesion with the diaphragms on the surfaces of the first battery cell 220 and the second battery cell 230, so as to ensure that even if the tab 216 is broken, the broken tab 216 can be kept unchanged from the battery cell based on the first insulating glue 218 and the second insulating glue, and the first insulating glue 218 and the second insulating glue 219 are prevented from being separated from the battery cell along with the breakage of the tab 216.

The material of the insulating tape is, for example, PP, PET, polyimide, etc., and is not limited herein.

To sum up, the electric core subassembly that this application embodiment provided compares in the mode of independently setting up from insulating glue to every utmost point ear, and the wholeness is better under the prerequisite of guaranteeing insulating effect, even wherein arbitrary utmost point ear fracture back, based on under another utmost point ear not cracked prerequisite, still can guarantee that cracked utmost point ear still pastes first insulating glue and/or second insulating glue, can not lead to cracked utmost point ear directly to drop and insert electric core inside. The battery comprising the battery core assembly improves the safety performance of the battery core by utilizing the improvement of the battery core assembly.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The battery cell assembly is characterized by comprising at least two battery cells;

each electric core is provided with two lugs with opposite polarities, and in any two adjacent electric cores, the two lugs with the same polarity are electrically connected with the corresponding pole columns through the adapter sheet to form a connecting assembly;

in each group of the connecting assemblies, an electrical assembly area is formed between each tab and the switching sheet, a first insulating adhesive is arranged on one side of the electrical assembly area, which is far away from the pole, and a second insulating adhesive is arranged on one side of the electrical assembly area, which faces the pole;

and the two electrical assembly areas are connected together through the first insulating glue, and/or the two electrical assembly areas are connected together through the second insulating glue.

2. The cell assembly of claim 1, wherein in each of the connection assemblies, two of the electrical assembly regions are connected together by the first insulating glue, and the first insulating glue is connected to at least one of the cells.

3. The battery pack of claim 2, wherein the two ends of the first insulating glue are connected to the two battery cells respectively.

4. The core assembly according to claim 2 or 3, wherein each of the cells has a mounting surface, the tabs are disposed on the mounting surface, any two adjacent cells are oppositely arranged with the mounting surfaces opposite, and at least one end of the first insulating glue is connected with the mounting surface.

5. The battery core assembly according to claim 4, wherein each battery cell has a lower surface connected with the mounting surface, the lower surface is located on a side of the battery cell away from the pole, and at least one end of the first insulating glue is sequentially connected with the mounting surface and the lower surface.

6. The cell assembly of claim 1, wherein in each group of the connecting assemblies, two of the electrical assembly regions are connected together by the second insulating glue, and the second insulating glue is connected to at least one of the cells.

7. The battery pack of claim 6, wherein two ends of the second insulating glue are connected to two of the battery cells respectively.

8. The electrical core assembly of claim 7, wherein the first and second insulating glues are insulating tapes.

9. A battery comprising a cover assembly and the core assembly of any one of claims 1-8 engaged with the cover assembly.

10. The battery of claim 9, wherein the cover plate assembly comprises a lower insulating member, the lower insulating member is located on one side of the adapter sheet close to the pole, and one side of the lower insulating member close to the adapter sheet is attached to the second insulating glue.