CN219476939U - Battery and battery device - Google Patents
Battery and battery device Download PDFInfo
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- CN219476939U CN219476939U CN202320346127.3U CN202320346127U CN219476939U CN 219476939 U CN219476939 U CN 219476939U CN 202320346127 U CN202320346127 U CN 202320346127U CN 219476939 U CN219476939 U CN 219476939U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery and a battery device, wherein the battery comprises a battery core, the battery core is provided with a battery core side surface and a battery core large surface, a tab is arranged on the battery core side surface, the tab is provided with a connecting section, one end of the connecting section is electrically connected with the battery core side surface, the other end of the connecting section extends from the battery core side surface towards the battery core large surface and is folded to form a free section, and the free section at least partially covers the battery core large surface; a first insulating layer is arranged between the free section and the large surface of the battery cell, and the first insulating layer at least partially covers the side surface of the battery cell. According to the utility model, the first insulating layer at least partially covers the side surface of the battery cell and the part of the large surface of the battery cell, which is close to the free section of the tab, so that the free section is prevented from being inserted into a gap on the side surface of the battery cell when the tab is folded, the short circuit between the tab and the pole piece is avoided, and the safety of the battery is improved.
Description
Technical Field
The utility model relates to the technical field of energy storage, in particular to a battery and a battery device.
Background
At present, a battery is used for providing energy for equipment, an electric core is an energy storage unit inside the battery, the battery is packaged in a space formed by a cover plate and a shell, and an electric core tab is connected with a pole post of the battery to realize an electronic path between the electric core and an external circuit.
Current cell structures have both winding and lamination. The winding battery cell is formed by stacking the positive plate, the diaphragm and the negative plate and then winding for a plurality of circles, the lamination battery cell is formed by respectively inserting the positive plate and the negative plate into the Z-shaped folded diaphragm at intervals, and gaps are formed on the side surfaces of the battery cell due to the winding structure or the lamination structure of the winding battery cell and the lamination battery cell.
After the lug of battery passes through connection piece and post realization electric connection, in order to reduce the occupation space of lug, need to surpass the lug and turn over the folding of the big face of electric core by electric core side and pack up, turn over the folding in-process of packing up with the lug, in the lug can insert the clearance of electric core side, and then lead to the pole piece in lug and the clearance to take place the short circuit, there is the potential safety hazard.
Accordingly, there is a need for a battery and a battery device that overcomes the above-described drawbacks.
Disclosure of Invention
In order to overcome the defects in the prior art, one of the purposes of the utility model is that an insulating layer is covered on the part, close to the lug, of the large surface of the battery core, and extends towards the side surface of the battery core, and at least part of the insulating layer covers the side surface of the battery core, so that the free section of the lug can be prevented from being inserted into a gap of the side surface of the battery core when the lug is folded, and an insulating protection effect is achieved.
The second object of the present utility model is to provide a battery device, in which an insulation layer is covered on a portion of a large surface of a battery cell, which is close to a tab, and the insulation layer extends toward a side surface of the battery cell, and at least partially covers the side surface of the battery cell, so that a free section of the tab can be prevented from being inserted into a gap of the side surface of the battery cell when the tab is folded, and an insulation protection effect is achieved.
One of the purposes of the utility model is realized by adopting the following technical scheme:
the utility model provides a battery, includes the electric core, and the electric core has electric core side and the big face of electric core, is equipped with the utmost point ear on the electric core side, and the utmost point ear has linkage segment and free section, and the one end and the electric core side electric connection of linkage segment, the other end of linkage segment extend and turn over the book by electric core side towards the big face of electric core and form the free section, and free section covers the big face of electric core at least partially, is equipped with first insulating layer between free section and the big face of electric core, and first insulating layer covers in electric core side at least partially.
The second purpose of the utility model is realized by adopting the following technical scheme:
a battery device comprises the battery.
Compared with the prior art, the utility model has the beneficial effects that:
according to the battery and the battery device provided by the utility model, the side surface of the battery cell and the part of the large surface of the battery cell, which is close to the electrode lug, are covered with the insulating layer, and the insulating layer covers the gap at the junction of the side surface of the battery cell and the large surface of the battery cell, so that the free section of the electrode lug can be prevented from being inserted into the gap when being folded and retracted, the short circuit of the battery cell caused by the contact of the electrode lug and the electrode piece is effectively avoided, and the safety performance of the battery is improved.
Drawings
Fig. 1 is a schematic view showing a part of the structure of a battery according to the present utility model;
FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;
FIG. 3 is a schematic diagram of a cell according to the present utility model;
fig. 4 is a schematic view of a part of the structure of a battery according to the present utility model.
In the figure: 1. a battery cell; 101. a tab; 11. a first connection section; 12. a second connection section; 13. a free section; 2. a cover plate; 201. a pole assembly; 202. an explosion-proof valve; 203. a liquid injection hole; 3. a connecting piece; 4. a first insulating layer.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and detailed description below:
in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1 and 2, the utility model discloses a battery, which comprises a battery cell 1, wherein the battery cell 1 is provided with a battery cell side surface and a battery cell large surface;
the battery cell side is provided with a tab 101, the tab 101 is provided with a connecting section and a free section 13, one end of the connecting section is electrically connected with the battery cell side, specifically, one end of the connecting section is electrically connected with a pole piece in the battery cell side, the other end of the connecting section extends and turns over from the battery cell side towards the large battery cell surface, the extending and turning over part forms the free section 13, and the free section 13 at least partially covers the large battery cell surface.
Referring to fig. 4, in order to achieve the insulating effect, a first insulating layer 4 is disposed between the free section 13 and the large cell surface, and the first insulating layer 4 extends from the large cell surface toward the side of the cell and at least partially covers the side of the cell.
It should be noted that, because the structure of the battery cell 1 in the prior art has two types of winding and lamination, the winding battery cell 1 is formed by winding a plurality of circles after the positive plate, the diaphragm and the negative plate are stacked, and on the winding-formed battery cell 1 structure, the surface capable of seeing the winding layer number of the battery cell 1 structure is a battery cell side surface, and a gap formed by the winding structure exists on the battery cell side surface; the surface with larger area adjacent to the side surface of the battery cell is a large surface of the battery cell, and the surface with smaller area adjacent to the side surface of the battery cell is a terminal surface of the battery cell.
The laminated battery cell 1 is obtained by respectively inserting positive plates and negative plates into Z-shaped folded diaphragms at intervals, and on a battery cell 1 structure formed by lamination, the surface of the lamination layer number of the battery cell 1 structure can be seen as a battery cell side surface, and a gap formed by the lamination structure exists on the battery cell side surface; in addition, the surface with larger area adjacent to the side surface of the battery cell is the large surface of the battery cell, and the surface with smaller area adjacent to the side surface of the battery cell is the end surface of the battery cell.
In the structure of the battery core 1 formed by winding or lamination, the lugs 101 on two sides of the structure of the battery core 1 are formed by stacking the lugs 101 of a plurality of positive plates or a plurality of negative plates, and the stacked lugs 101 are folded from one side of the first connecting sheet and are covered on the outer surface of the first connecting sheet and then welded with the first connecting sheet.
When the number of pole pieces of the battery cell 1 is large and the battery is thick, the tab 101 of each pole piece in the battery cell 1 is the same length, so that the tab 101 far away from the pole piece on one side of the folded structure is required to be provided with a sufficient welding area with the first connecting piece after being folded, and the length of the tab 101 is required to be set to be sufficiently long. Thus, the tab 101 of the pole piece close to the folded side is folded to exceed the edge of the first connecting piece, and even exceed the side surface of the battery cell.
When the battery cell 1 is assembled into the battery case, in order to save the occupied space of the tab 101, the portion of the tab 101 beyond the side surface of the battery cell needs to be folded and folded to the large surface of the battery cell. However, there is a gap formed during winding or lamination on the side of the cell, and when the tab 101 is turned towards the large surface of the cell, the free end of the tab 101 may be inserted into the gap between the side of the cell and the large surface of the cell, so that the cell 1 is shorted.
Therefore, the first insulating layer 4 needs to be disposed at the portion of the large surface of the battery cell, which is close to the tab 101, and the first insulating layer 4 extends to the side surface of the battery cell, so that the first insulating layer 4 can partially cover the gap on the side surface of the battery cell, and the problem that the free end of the tab 101 is inserted into the gap to cause short circuit of the battery cell 1 when the tab 101 is turned over towards the large surface of the battery cell is avoided.
The first insulating layer 4 can achieve the same effect whether it is applied to the battery cell 1 formed by the winding process or the battery cell 1 formed by the lamination process.
The structure of the battery cell 1 formed by the winding process will be described below,
when the battery is used, one end of the connecting section of the tab 101 is electrically connected with the pole piece in the side face of the battery cell, the other end of the connecting section extends out of the side face of the battery cell and extends along the side face of the battery cell, and the connecting section extends along the side face of the battery cell and forms an overlapped connecting part with the connecting piece 3 in order to increase the connecting area of the connecting section and the connecting piece 3, and the connecting section exceeds the non-overlapped part of the connecting piece 3 to form a free section 13;
in order to reduce the occupied space of the tab 101, the free section 13 may be folded towards the large surface of the battery cell, however, due to the gap formed by the winding structure on the side surface of the battery cell, when the side surface of the battery cell is folded towards the large surface of the battery cell, the free section 13 may be inserted into the gap at the intersection of the side surface of the battery cell and the large surface of the battery cell to be shorted with the pole piece, thereby causing short circuit of the battery.
Therefore, the first insulating layer 4 is disposed on the large surface of the cell near the free section 13, and the first insulating layer 4 extends toward the side of the cell to partially cover the side of the cell.
In this application, the first insulating layer 4 covers the large area of the cell near the free section 13, and when the large area of the cell extends to partially cover the side surface of the cell, the first insulating layer 4 covers the gap at the intersection between the side surface of the cell and the large area of the cell.
Therefore, when the free section 13 of the tab 101 is turned towards the large surface of the battery cell, the gap at the intersection of the side surface of the battery cell and the large surface of the battery cell can be avoided, and the problem that the tab 101 is short-circuited with a pole piece in the gap due to the insertion of the tab 101 into the gap on the side surface of the battery cell can be avoided.
The first insulating layer 4 may be an insulating tape, and may be wound around a position of the large surface of the battery cell near the free section 13 and extend to a position partially covering the side surface of the battery cell, so that a gap cover on a junction between the large surface of the battery cell and the side surface of the battery cell can be avoided when the free section 13 is folded, and effective insulation is formed between the tab 101 and the large surface of the battery cell and between the tab 101 and the side surface of the battery cell.
In addition, the first insulating layer 4 may be insulating adhesive paper, which covers the large surface of the battery cell near the free section 13 and extends to partially cover the side surface of the battery cell, and covers the gap at the junction of the large surface of the battery cell and the side surface of the battery cell.
Because the first insulating layer 4 continuously and uninterruptedly covers the position of the large surface of the battery cell close to the free section 13 and extends to partially cover the side surface of the battery cell, the first insulating layer 4 forms effective insulation at the junction of the large surface of the battery cell and the side surface of the battery cell, and when the free section 13 is turned over towards the large surface of the battery cell, the first insulating layer 4 blocks the free section 13 outside the gap, thereby realizing insulation protection.
Further, the battery comprises a connecting piece 3, wherein the connecting piece 3 is used for connecting the pole piece and the pole post; specifically, the connecting piece 3 includes a first connecting piece and a second connecting piece that are mutually connected, the first connecting piece is arranged between the connecting section of the tab 101 and the side surface of the battery cell, and the first connecting piece is electrically connected with the tab 101 through the connecting section; in addition, the second connecting piece is used for realizing electric connection with the pole.
Referring to fig. 4, on the basis of the structure, the first connecting piece is arranged between the connecting section and the side surface of the battery cell, and when the connecting section extends along the side surface of the battery cell, the overlapping part of the first connecting piece and the connecting section can be welded due to the overlapping part of the first connecting piece and the non-overlapping part exceeding the first connecting piece, so that the first connecting piece is electrically connected with the pole piece;
then, the second connecting sheet is electrically connected with the pole; because the first connecting sheet and the second connecting sheet are mutually connected, the connection between the pole piece and the pole post can be realized through the connecting piece 3; moreover, the arrangement of the connecting piece 3 increases the welding area of the tab 101 and the first connecting piece and the welding area of the tab post and the second connecting piece, thereby guaranteeing the connection performance and improving the conductive effect.
It should be noted that, according to the positions of the tab 101 and the post, the connecting pieces 3 with different shapes may be selected; in this embodiment, the side surface of the battery cell provided with the tab 101 is disposed adjacent to the end surface of the battery cell provided with the pole, so that an L-shaped connecting piece 3 can be selected;
the connecting piece 3 is arranged at the corner of the side surface of the battery core and the end surface of the battery core, the first connecting piece is positioned between the side surface of the battery core and the connecting section of the pole lug 101, the second connecting piece is positioned between the end surface of the battery core and the pole post, and the pole lug 101 and the pole post are respectively and electrically connected with the connecting piece 3, so that the conduction between the pole lug 101 and the pole post can be realized.
In addition, when the lug 101 and the pole are arranged on the same side face of the battery cell, the connecting piece 3 in a straight strip shape can be selected, and the lug 101 and the pole are respectively welded at different positions of the connecting piece 3, so that the connection between the lug 101 and the pole can be realized.
The connection mode between the connecting piece 3 and the tab 101 may be riveting, fastening piece threaded connection, ultrasonic welding, etc., so that the electrical connection between the connecting piece 3 and the tab 101 can be realized.
Further, referring to fig. 2 and 3, the connection section includes a first connection section 11 and a second connection section 12, one end of the first connection section 11 is electrically connected with the side surface of the battery cell, specifically, one end of the first connection section 11 is welded with the pole piece to realize electrical connection, the other end of the first connection section 11 is connected with one end of the second connection section 12, and the other end of the second connection section 12 extends along the side surface of the battery cell and is connected with one end of the free section 13; the second connecting section 12 is welded with the first connecting piece, so that the connecting piece 3 is electrically connected with the tab 101.
On the basis of the structure, as the connecting section extends along the side surface of the battery cell, the first connecting sheet is arranged between the connecting section and the side surface of the battery cell, and therefore the part of the connecting section, which covers the side surface of the battery cell, forms a second connecting section 12, and the second connecting section 12 can be welded with the first connecting sheet, so that the welding area of the tab 101 and the connecting piece 3 is increased;
wherein, in order to ensure that the welding area of utmost point ear 101 and first connecting piece is big enough, when the connecting section extends along electric core side, the length of connecting section can surpass first connecting piece, and the part that does not overlap with first connecting piece forms free section 13 on the connecting section, and free section 13 can turn over towards electric core face greatly and fold up.
When welding the tab 101 and the connector 3, a plurality of tabs 101 may be welded first, and then the tab 101 and the connector 3 may be welded; thus, the connection failure caused by the falling of welding spots of one or more lugs 101 and the connecting piece 3 is prevented, the welding effect of the lugs 101 and the connecting piece 3 is enhanced, and the conductivity is improved.
Further, a first insulating region is formed at a part of the first insulating layer 4 covered on the side surface of the battery cell, a second insulating region is formed at a part of the first insulating layer 4 covered on the large surface of the battery cell, and the first insulating region and the second insulating region are arranged continuously; the projection of the first connecting sheet on the side surface of the battery cell is positioned in the first insulating region so as to effectively insulate the first connecting sheet from the side surface of the battery cell.
On the basis of the structure, a first insulating area is formed by the part, covered on the side surface of the battery cell, of the first insulating layer 4, the connecting piece 3 is arranged at the corner of the side surface of the battery cell and the end surface of the battery cell, wherein the first connecting piece is arranged between the side surface of the battery cell and the connecting section, and the projection of the first connecting piece on the side surface of the battery cell is positioned in the first insulating area.
In this way, the first insulating layer 4 is arranged between the inner surface of the first connecting sheet, which is close to the side surface of the battery cell, and the side surface of the battery cell, so that the short circuit between the first connecting sheet and the pole piece in the side surface of the battery cell can be prevented, and the first connecting sheet and the side surface of the battery cell can be effectively insulated.
It should be noted that, in the prior art, an insulating layer is arranged on the inner surface of the connecting piece 3 close to the side surface of the battery cell, in the application, the first insulating layer 4 is arranged on the side surface of the battery cell and covers the projection of the first connecting piece on the side surface of the battery cell, and the insulating layer on the inner surface of the original connecting piece 3 close to the side surface of the battery cell is replaced, so that effective insulation is formed between the first connecting piece and the pole piece in the side surface of the battery cell; meanwhile, the process flow can be reduced, the operation is simple, and the cost is reduced.
The area of the second insulation area covering the large surface of the battery cell should be larger than the projection area of the free section 13 on the large surface of the battery cell, so that when the free section 13 is folded onto the large surface of the battery cell, the contact parts of the free section 13 and the large surface of the battery cell are all arranged on the first insulation layer 4, and the first insulation layer 4 effectively insulates the free section 13 from the large surface of the battery cell;
in addition, the junction of the first insulating region and the second insulating region is the junction region of the side surface of the battery cell and the large surface of the battery cell; because the first insulating region and the second insulating region are continuously and uninterruptedly arranged, the first insulating layer 4 covers the junction area of the side surface of the battery cell and the large surface of the battery cell, and the free section 13 can be prevented from being inserted into a gap in the junction area when the tab 101 is turned over from the side surface of the battery cell to the large surface of the battery cell.
Further, the battery cell 1 comprises a battery cell end face, the battery cell end face is adjacent to the battery cell side face, and the battery cell end face and the battery cell side face are arranged around the large battery cell surface together; the battery comprises a cover plate 2, wherein a pole assembly 201 is arranged on the cover plate 2, the pole assembly 201 is connected with a connecting piece 3, and the pole assembly 201 is used for leading out the voltage of the battery; wherein, the cover plate 2 is arranged corresponding to the end face of the battery cell.
On the basis of the structure, the connecting piece 3 comprises a second connecting piece which is connected with the first connecting piece, the second connecting piece is arranged between the cover plate 2 and the end face of the battery cell, and the second connecting piece is welded with the pole assembly 201; the voltage lug 101 in the battery core 1 is led out and is conducted to the pole assembly 201 of the cover plate 2 through the connecting piece 3, so that the pole assembly 201 is electrically connected with the lug 101, and external circuit communication of the pole assembly 201 is realized.
It should be noted that, since the tab 101 and the pole are respectively located at two adjacent sides of the battery core 1 and are far apart, the L-shaped connecting piece 3 is required to be used as a connection, and the connection effect between the tab 101 and the pole is enhanced by increasing the welding area between the connecting piece 3 and the tab 101 and between the connecting piece 3 and the pole;
when the tab 101 and the pole are located on the same side of the battery cell 1 and the distance is relatively short, the tab 101 and the pole can be directly welded to realize electrical connection.
Further, the battery comprises a shell, the shell is provided with a cavity of the battery cell 1 and an opening, the battery cell 1 is installed in the cavity of the battery cell 1 through the opening of the shell, and the cover plate 2 is installed at the opening of the shell to seal the battery in the cavity of the battery cell 1.
On the basis of the structure, the electrode lug 101 of the battery core 1 is welded with the first connecting sheet of the connecting piece 3, and then the second connecting sheet of the connecting piece 3 is welded with the electrode post assembly 201 on the cover plate 2, so that the electrode post is connected with the electrode lug 101.
When the battery cell 1 is packaged into the shell, the free section 13 exceeding the first connecting sheet after the tab 101 and the first connecting sheet are welded is folded towards the large surface of the battery cell, the battery cell 1 is installed into the cavity of the battery cell 1 through the opening, and the cover plate 2 is covered at the opening of the shell.
According to the embodiment, through the arrangement of the connecting piece 3 and the cover plate 2, the problems that the welding spots are more, the welding is unstable and the like caused by the fact that the lug 101 of the battery core 1 is too short and can only be welded on the battery shell nearby can be avoided, the welding area of the connecting piece 3 and the lug 101 is increased, and therefore the welding effect and the conductivity of the pole and the lug 101 are improved.
Further, a second insulating layer is disposed between the inner sidewall of the housing and the tab 101, the second insulating layer is used for preventing the tab 101 from contacting the inner sidewall of the housing to generate a short circuit, and the second insulating layer covers the first connection section 11, the second connection section 12 and the free section 13 of the tab 101.
Because the tab 101 is electrically connected with the pole on the cover plate 2 through the connecting piece 3, the cover plate 2 is connected with the shell, and insulation is needed between the inner side wall of the shell and the tab 101 in order to prevent the contact between the tab 101 and the inner side wall of the shell from shorting.
Therefore, a second insulating layer is provided between the inner side wall of the housing and the tab 101, wherein the second insulating layer covers the first connection section 11 of the tab 101 and covers the second connection section 12 and the free section 13 along the extending direction of the tab 101.
Specifically, the second insulating layer may be insulating adhesive tape or insulating paper, and continuously and uninterruptedly wraps the first connecting section 11, the second connecting section 12 and the free section 13, so that the second insulating layer integrally wraps the tab 101 to form insulation, and the insulation effect of the tab 101 is ensured.
In addition, because the first insulating layer 4 partially covers the large surface of the battery cell and the side surface of the battery cell, the second insulating layer integrally wraps the lug 101, and when the free section 13 of the lug 101 turns over towards the large surface of the battery cell, the first insulating layer 4 and the second insulating layer play a double insulating protection role on the free section 13, so that the short circuit between the free section 13 and the pole piece can be prevented, the insulating effect is guaranteed, and the use safety of the battery cell 1 is improved.
Further, the cover plate 2 is provided with an explosion-proof valve 202 and a liquid injection hole 203, the explosion-proof valve 202 and the liquid injection hole 203 are arranged at intervals, the explosion-proof valve 202 is used for pressure relief and explosion prevention when being opened, and the liquid injection hole 203 is used as a channel for injecting electrolyte into the battery cell 1.
On the basis of the structure, the battery cell 1 is packaged into a shell after being wound, and a cover plate 2 is arranged at an opening of the shell to realize a sealing cover; then electrolyte is injected into the battery cell 1 in the shell through the electrolyte injection hole 203 on the cover plate 2, and the electrolyte injection hole 203 is sealed after the electrolyte injection is completed.
Thus, the battery cell 1 can be packaged and then injected, so that the sufficient electrolyte in the shell is ensured, and the electrolyte injection hole 203 is sealed, so that the overall air tightness of the battery is ensured.
When the battery cell 1 is in short circuit, overcharging and the like to cause thermal runaway, the temperature in the battery cell 1 is rapidly increased, the electrolyte is vaporized in a high-temperature environment, the pressure in the battery cell 1 is increased by gas generated after vaporization, and the explosion-proof valve 202 is broken through by the gas; or, after a certain pressure is reached in the battery cell 1, the explosion-proof valve 202 is automatically opened, so that a pressure relief channel is formed on the cover plate 2, and the gas and the liquid in the battery cell 1 are discharged from the pressure relief channel, so that explosion is avoided.
Further, the utility model discloses a battery device, which comprises the battery, wherein the battery device of the embodiment can be the battery, a battery pack formed by a plurality of the batteries, and a battery pack or a battery pack commonly used in the prior art.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.
Claims (10)
1. A battery, characterized by comprising,
the battery cell (1), electric core (1) has electric core side and electric core big face, be equipped with utmost point ear (101) on the electric core side, utmost point ear (101) have linkage segment and free section (13), the one end of linkage segment with electric core side electric connection, the other end of linkage segment by electric core side orientation electric core big face extends and turns over the book and form free section (13), free section (13) at least part covers electric core big face, free section (13) with be equipped with first insulating layer (4) between the electric core big face, first insulating layer (4) at least part cover in electric core side.
2. The battery according to claim 1, characterized in that the battery comprises a connecting member (3), the connecting member (3) comprising a first connecting piece and a second connecting piece which are mutually engaged; the first connecting piece is arranged between the connecting section and the side surface of the battery cell, and is electrically connected with the tab (101); the second connecting piece is used for being electrically connected with the pole.
3. The battery according to claim 2, wherein the connection section comprises a first connection section (11) and a second connection section (12), one end of the first connection section (11) is electrically connected with the side surface of the electric core, and the other end of the first connection section (11) is connected with one end of the second connection section (12); the other end of the second connecting section (12) extends along the side surface of the battery cell and is connected with one end of the free section (13); the second connecting section (12) is welded with the first connecting piece so that the connecting piece (3) is electrically connected with the tab (101).
4. The battery according to claim 2, wherein a portion of the first insulating layer (4) covering the side surface of the cell forms a first insulating region, and a portion of the first insulating layer (4) covering the large surface of the cell forms a second insulating region; the projection of the first connecting sheet on the side surface of the battery cell is positioned in the first insulating region.
5. The battery according to claim 2, characterized in that the cell (1) comprises a cell end face, which is adjacent to the cell side face; the battery comprises a cover plate (2), wherein a pole assembly (201) is arranged on the cover plate (2), and the cover plate (2) and the end face of the battery cell are correspondingly arranged;
the second connecting piece is arranged between the cover plate (2) and the end face of the battery cell, and the second connecting piece is welded with the pole assembly (201) so that the pole assembly (201) is electrically connected with the pole lug (101).
6. The battery according to claim 5, characterized in that the battery comprises a housing provided with a cell cavity and an opening, the cell (1) being mounted into the cell cavity through the opening, the cover plate (2) being mounted to the opening to cover the cell cavity.
7. The battery according to claim 6, characterized in that a second insulating layer is provided between the inner side wall of the housing and the tab (101), the second insulating layer covering the first connection section (11), the second connection section (12) and the free section (13) of the tab (101).
8. The battery according to claim 5, wherein an explosion-proof valve (202) is arranged on the cover plate (2), and the explosion-proof valve (202) is used for pressure relief and explosion prevention.
9. The battery according to claim 5, wherein the cover plate (2) is provided with a liquid injection hole (203), and the liquid injection hole (203) is used as a channel for injecting electrolyte into the battery cell (1).
10. A battery device comprising the battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320346127.3U CN219476939U (en) | 2023-02-27 | 2023-02-27 | Battery and battery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320346127.3U CN219476939U (en) | 2023-02-27 | 2023-02-27 | Battery and battery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219476939U true CN219476939U (en) | 2023-08-04 |
Family
ID=87435447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320346127.3U Active CN219476939U (en) | 2023-02-27 | 2023-02-27 | Battery and battery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219476939U (en) |
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2023
- 2023-02-27 CN CN202320346127.3U patent/CN219476939U/en active Active
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