Battery and terminal device
By placing conductive plates of opposite polarity on both sides of the battery core instead of traditional terminals, the problem of thick battery casing is solved, achieving the effects of battery weight reduction and cost reduction.
Patent Information
- Application Number
- CN202521796979.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-08-22
AI Technical Summary
Existing battery casings are thicker because they need to hold the terminals in place, which increases the weight and production cost of the battery.
The battery uses a first conductive sheet and a second conductive sheet on both sides of the electrode core. The first conductive sheet is sealed to the housing and closes the window. The second conductive sheet is electrically connected to the conductive part, replacing the traditional electrode post. The conductive sheets with opposite polarities serve as the two poles of the battery, reducing the thickness of the housing and reducing production costs.
By reducing the thickness of the casing, the weight and production cost of the battery are reduced, while the strength and resistance to damage are improved.
Smart Images
Figure CN224946840U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery technology, and in particular relates to a battery and terminal equipment. Background Technology
[0002] Batteries are generally used to provide electricity. Typically, pouch batteries or steel-cased batteries are used to power electronic products. In existing batteries, the internal space of the battery casing contains the electrode core, from which the tab extends. The tab connects to the terminal posts of the battery casing. Because the terminal posts need to be fixed to the battery casing, the battery casing is relatively thick to ensure the installation strength of the terminal posts. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a battery and terminal device to address the issue of excessive thickness in existing battery casings.
[0004] To address the aforementioned problems, one embodiment of this utility model provides a battery, including a casing and an electrode core, wherein the casing forms a receiving cavity, and the electrode core is disposed in the receiving cavity; At least a portion of the housing is configured as a conductive part, and a window is provided on the housing; The electrode core is provided with a first conductive sheet and a second conductive sheet on both outer sides, and the first conductive sheet and the second conductive sheet are both electrically connected to the electrode core, and the polarities of the first conductive sheet and the second conductive sheet are opposite. The first conductive sheet is sealed to the housing and closes the window, and the first conductive sheet is insulated from the housing. The second conductive sheet is electrically connected to the conductive part.
[0005] As a further improvement to the above technical solution: Optionally, the electrode core includes a first electrode and a second electrode; The first electrode includes a first current collector and a first active coating disposed on the first current collector; The second electrode includes a second current collector and a second active coating disposed on the second current collector; The two outer sides of the electrode core in the thickness direction are the first electrode sheet and the second electrode sheet, respectively; the outer side of the first electrode sheet located outside the electrode core has a first empty foil area that is not covered by the first active coating; the outer side of the second electrode sheet located outside the electrode core has a second empty foil area that is not covered by the second active coating. The first conductive sheet is the first electrode sheet having the first empty foil area, or a conductive sheet stacked on the outside of the first empty foil area and electrically connected to the first electrode sheet; The second conductive sheet is the second electrode sheet having the second empty foil area, or a conductive sheet stacked on the outside of the second empty foil area and electrically connected to the second electrode sheet.
[0006] Optionally, the electrode core is a wound electrode core, the first electrode sheet of the electrode core includes a plurality of first electrode tabs, each first electrode tab being located on one side of the electrode core, the second electrode sheet of the electrode core includes a plurality of second electrode tabs, each second electrode tab being located on the other side of the electrode core, each first electrode tab of the electrode core is connected to the first conductive sheet, and each second electrode tab is connected to the second conductive sheet.
[0007] Optionally, the electrode core is a stacked electrode core, which includes a plurality of first electrode plates and a plurality of second electrode plates. The first electrode tab of each first electrode plate is located on one side of the electrode core, and the second electrode tab of each second electrode plate is located on the other side of the electrode core. Each first electrode tab of the electrode core is connected to the first conductive plate, and each second electrode tab is connected to the second conductive plate.
[0008] Optionally, the edge of the first current collector is exposed outside the first active coating and forms the first tab; The edge of the second current collector is exposed to the second active coating and forms the second tab.
[0009] Optionally, the first conductive sheet is the first electrode sheet having the first empty foil area, and each of the first electrode tabs is connected to form a first electrode tab group; The second conductive sheet is a second electrode sheet having the second empty foil area, and each of the second electrode tabs is connected to form a second electrode tab group.
[0010] Optionally, the first conductive sheet is a conductive sheet stacked on the outside of the first empty foil area, one end of the first conductive sheet is welded to each of the first tabs to form a first tab assembly, and the portion of the first conductive sheet exposed in the window is welded to the first empty foil area. The second conductive sheet is a conductive sheet stacked on the outside of the second empty foil area, and one end of the second conductive sheet is connected to each of the second tabs to form a second tab assembly; the second conductive sheet is welded to the housing.
[0011] Optionally, the thickness of the first current collector of the first electrode having the first empty foil region is greater than or equal to the thickness of the first current collector of the remaining first electrodes; The thickness of the second current collector of the second electrode with the second empty foil region is greater than or equal to the thickness of the second current collector of the remaining second electrodes.
[0012] Optionally, the electrode core is a square, circular, annular, open annular, triangular, or irregularly shaped electrode core.
[0013] Optionally, the battery further includes an insulating gasket located between the first conductive sheet and the housing, the insulating gasket being used to insulate the first conductive sheet and the housing.
[0014] Optionally, the insulating gasket is a double-sided adhesive ring, with one side of the double-sided adhesive ring attached to the housing and the other side attached to the first conductive sheet.
[0015] Optionally, the housing includes a first half-shell and a second half-shell, which can form the receiving cavity, and the window is opened in the first half-shell.
[0016] Optionally, the sidewalls of the first half-shell and the sidewalls of the second half-shell are nested together.
[0017] Optionally, the sidewalls of the first half-shell and the sidewalls of the second half-shell are welded together at the locations where they are nested.
[0018] Optionally, the housing is provided with an injection hole and a sealing element. The injection hole penetrates the side wall of the first half-shell and the side wall of the second half-shell. The sealing element is used to block the injection hole and seal the connection of the housing.
[0019] Optionally, the window is formed in the first half-shell; at least the middle region of the side of the second half-shell facing the window protrudes into the receiving cavity to form an inner protrusion.
[0020] Optionally, an upper cavity is formed between the inner protrusion and the sidewall of the second half-shell.
[0021] Optionally, the shell is a steel shell, and the thickness of the first half-shell is D1, where 0.1mm < D1 < 0.2mm; The thickness of the second half-shell is D2, 0.1mm < D2 < 0.15mm.
[0022] On the other hand, this utility model embodiment provides a terminal device, including a battery compartment and a battery as described above, wherein the battery compartment forms a placement cavity and the battery is installed in the placement cavity.
[0023] As a further improvement to the above technical solution: Optionally, the battery compartment includes a compartment body and a compartment cover, the compartment body and the compartment cover forming the placement cavity; The chamber body and the chamber cover are fixed together by fasteners.
[0024] Optionally, the terminal device further includes a first conductive adhesive tape and a second conductive adhesive tape. The battery is fixed to the placement cavity by the conductive adhesive tape, and the conductive adhesive tape can be conductively connected to the first conductive sheet or the conductive part. The battery supplies power to the terminal device through the conductive adhesive tape.
[0025] The battery and terminal device provided in this embodiment of the utility model have at least the following advantages compared with the prior art: In this battery, a first conductive sheet and a second conductive sheet are provided on both outer sides of the electrode core, and both the first conductive sheet and the second conductive sheet are electrically connected to the electrode core. The polarities of the first conductive sheet and the second conductive sheet are opposite. The first conductive sheet is sealed to the shell and closes the window, and the first conductive sheet is insulated from the shell. The second conductive sheet is electrically connected to the conductive part. The first conductive sheet and the conductive part serve as the two poles of the battery, replacing the terminals of the traditional battery. Therefore, compared with the existing battery, the battery shell does not need to fix the terminals, which can reduce the thickness of the shell, thereby reducing the weight of the battery and reducing the production cost of the battery. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the battery structure provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the electrode core of a battery provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the insulating gasket of the battery provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the upper shell of a battery provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of the lower half of the battery shell provided in one embodiment of the present invention; Figure 6 This is one of the battery shapes provided in one embodiment of the present invention; Figure 7 This is the second shape of the battery provided in one embodiment of the present invention; Figure 8 The battery shape provided in one embodiment of this utility model is three; Figure 9 The battery shape provided in one embodiment of this utility model is four.
[0028] The reference numerals in the accompanying drawings are as follows: 100. Battery; 110. Casing; 111. Window; 112. First half-casing; 113. Second half-casing; 120. Electrode core; 130. First conductive sheet; 140. Second conductive sheet; 150. Insulating gasket. Detailed Implementation
[0029] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0030] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] like Figures 1 to 5As shown, an embodiment of the present invention provides a battery 100, which includes a housing 110 and an electrode core 120. The housing 110 forms a receiving cavity, and the electrode core 120 is disposed in the receiving cavity. At least a portion of the housing 110 is configured as a conductive part, and a window 111 is opened on the housing 110. A first conductive sheet 130 and a second conductive sheet 140 are provided on both outer sides of the electrode core 120, and both the first conductive sheet 130 and the second conductive sheet 140 are electrically connected to the electrode core 120. The polarities of the first conductive sheet 130 and the second conductive sheet 140 are opposite. The first conductive sheet 130 is sealed to the housing 110 and closes the window 111, and the first conductive sheet 130 is insulated from the housing 110. The second conductive sheet 140 is electrically connected to the conductive part.
[0033] In this battery 100, a first conductive sheet 130 and a second conductive sheet 140 are provided on both outer sides of the electrode core 120. Both the first conductive sheet 130 and the second conductive sheet 140 are electrically connected to the electrode core 120. The first conductive sheet 130 and the second conductive sheet 140 have opposite polarities. The first conductive sheet 130 is sealed to the housing 110 and closes the window 111. The first conductive sheet 130 is insulated from the housing 110. The second conductive sheet 140 is electrically connected to the conductive part. The first conductive sheet 130 and the conductive part serve as the two poles of the battery 100, respectively, replacing the terminals of the conventional battery 100. Therefore, compared with the existing battery 100, the housing 110 of this battery 100 does not need to be fixed with terminals, so the thickness of the housing 110 can be reduced, thereby reducing the weight of the battery 100 and reducing the production cost of the battery 100.
[0034] In this embodiment, the casing 110 is made of steel with a thickness of 0.075 mm. Compared to the 0.2 mm steel casing of the existing battery 100 casing 110, the thickness of the casing 110 is reduced, thereby reducing the weight of the battery 100 and lowering its production cost. Of course, it is understood that the casing 110 can also be made of other conductive materials of other thicknesses, and this is not limited here. The conductive sheet is made of 30 μm foil, and the foil is ultrasonically welded to the tabs of the electrode core 120. Again, it is understood that the conductive sheet can also be made of other conductive materials of other thicknesses, and this is not limited here.
[0035] One embodiment of the present invention provides a battery 100, wherein the electrode core 120 includes a first electrode and a second electrode; the first electrode includes a first current collector and a first active coating disposed on the first current collector; the second electrode includes a second current collector and a second active coating disposed on the second current collector.
[0036] The two outer sides of the electrode core 120 in the thickness direction are the first electrode sheet and the second electrode sheet, respectively; the outer side of the first electrode sheet located outside the electrode core 120 has a first empty foil area that is not covered by the first active coating; the outer side of the second electrode sheet located outside the electrode core 120 has a second empty foil area that is not covered by the second active coating.
[0037] In one specific embodiment, the first conductive sheet 130 is a first electrode sheet having a first empty foil area. The first electrode sheet is sealed to the housing 110 and closes the window 111, and the first electrode sheet is insulated from the housing 110. The second conductive sheet 140 is a second electrode sheet having a second empty foil area, and the second electrode sheet is electrically connected to the conductive part.
[0038] In another specific embodiment, the first conductive sheet 130 is a conductive sheet stacked on the outside of the first empty foil area and electrically connected to the first electrode sheet. The first conductive sheet 130 is sealed to the housing 110 and closes the window 111, and the first conductive sheet 130 is insulated from the housing 110. The second conductive sheet 140 is a conductive sheet stacked on the outside of the second empty foil area and electrically connected to the second electrode sheet. The second conductive sheet 140 is electrically connected to the conductive part.
[0039] In a specific embodiment, the electrode core 120 is a wound electrode core 120. The first electrode sheet of the electrode core 120 includes a plurality of first electrode tabs, each of which is located on one side of the electrode core 120. The second electrode sheet of the electrode core 120 includes a plurality of second electrode tabs, each of which is located on the other side of the electrode core 120. Each of the first electrode tabs of the electrode core 120 is connected to a first conductive sheet 130, and each of the second electrode tabs is connected to a second conductive sheet 140.
[0040] In this embodiment, the first tab is the positive electrode of the wound electrode core 120, and the second tab is the negative electrode of the wound electrode core 120. Since each first tab of the electrode core 120 is connected to the first conductive sheet 130, and each second tab is connected to the second conductive sheet 140, the first conductive sheet 130 serves as the positive electrode of the battery 100, and the second conductive sheet 140 serves as the negative electrode of the battery 100. In another embodiment, the first tab is the negative electrode of the wound electrode core 120, and the second tab is the positive electrode of the wound electrode core 120. Since each first tab of the electrode core 120 is connected to the first conductive sheet 130, and each second tab is connected to the second conductive sheet 140, the first conductive sheet 130 serves as the negative electrode of the battery 100, and the second conductive sheet 140 serves as the positive electrode of the battery 100.
[0041] In another specific embodiment, the electrode core 120 is a stacked electrode core 120, which includes a plurality of first electrode plates and a plurality of second electrode plates. The first electrode tab of each first electrode plate is located on one side of the electrode core 120, and the second electrode tab of each second electrode plate is located on the other side of the electrode core 120. Each first electrode tab of the electrode core 120 is connected to a first conductive sheet 130, and each second electrode tab is connected to a second conductive sheet 140.
[0042] In this embodiment, the first tab is the positive electrode of the stacked electrode core 120, and the second tab is the negative electrode of the stacked electrode core 120. Since each first tab of the electrode core 120 is connected to the first conductive sheet 130, and each second tab is connected to the second conductive sheet 140, the first conductive sheet 130 serves as the positive electrode of the battery 100, and the second conductive sheet 140 serves as the negative electrode of the battery 100. In another embodiment, the first tab is the negative electrode of the stacked electrode core 120, and the second tab is the positive electrode of the stacked electrode core 120. Since each first tab of the electrode core 120 is connected to the first conductive sheet 130, and each second tab is connected to the second conductive sheet 140, the first conductive sheet 130 serves as the negative electrode of the battery 100, and the second conductive sheet 140 serves as the positive electrode of the battery 100.
[0043] The edge of the first current collector is exposed to the first active coating and forms a first tab; the edge of the second current collector is exposed to the second active coating and forms a second tab.
[0044] In one specific embodiment, the first conductive sheet 130 is a first electrode sheet having a first empty foil area, and each first electrode tab is connected to form a first electrode tab group; the second conductive sheet 140 is a second electrode sheet having a second empty foil area, and each second electrode tab is connected to form a second electrode tab group.
[0045] In another specific embodiment, the first conductive sheet 130 is a conductive sheet stacked on the outside of the first empty foil area, one end of the first conductive sheet 130 is welded to each of the first tabs to form a first tab assembly, and the portion of the first conductive sheet 130 exposed in the window 111 is welded to the first empty foil area; the second conductive sheet 140 is a conductive sheet stacked on the outside of the second empty foil area, one end of the second conductive sheet 140 is connected to each of the second tabs to form a second tab assembly, and the second conductive sheet 140 is welded to the housing 110.
[0046] In this embodiment, the battery cell is a laminated battery cell, and the thickness of the first current collector of the first electrode with the first empty foil area is greater than or equal to the thickness of the first current collector of the remaining first electrode; the thickness of the second current collector of the second electrode with the second empty foil area is greater than or equal to the thickness of the second current collector of the remaining second electrode.
[0047] Since the first electrode with the first empty foil area and the second electrode with the second empty foil area are located on opposite sides of the stacked cell, and the first conductive sheet 130 is a conductive sheet stacked outside the first empty foil area and electrically connected to the first electrode, the first conductive sheet 130 is sealed to the housing 110 and closes the window 111, and the first conductive sheet 130 is insulated from the housing 110; the second conductive sheet 140 is a conductive sheet stacked outside the second empty foil area and electrically connected to the second electrode, and the second conductive sheet 140 is electrically connected to the conductive part, therefore, the thickness of the first current collector of the first electrode with the first empty foil area is greater than or equal to the thickness of the first current collector of the other first electrodes; the thickness of the second current collector of the second electrode with the second empty foil area is greater than or equal to the thickness of the second current collector of the other second electrodes, which can improve the strength of the first electrode with the first empty foil area and the second electrode with the second empty foil area and reduce the probability of their damage.
[0048] In this embodiment, as Figure 1 and Figure 9 As shown, the electrode core 120 is square, and correspondingly, the housing 110 is also square. Of course, it is understood that the electrode core 120 can also be circular, annular, open annular, triangular, or irregular in shape, and the corresponding housing 110 can also be circular, annular, open annular, triangular, or irregular in shape, without limitation here.
[0049] One embodiment of this utility model provides a battery 100, such as... Figures 1 to 3 As shown, the battery 100 also includes an insulating gasket 150, which is located between the first conductive sheet 130 and the housing 110. The insulating gasket 150 is used to insulate the first conductive sheet 130 and the housing 110.
[0050] When the housing 110 is made of conductive metal, since the first conductive sheet 130 and the housing 110 are respectively the two poles of the battery 100, in order to prevent the battery 100 from short-circuiting due to the electrical connection between the first conductive sheet 130 and the housing 110, the insulating gasket 150 can insulate the first conductive sheet 130 and the housing 110, thereby preventing the battery 100 from short-circuiting due to the electrical connection between the first conductive sheet 130 and the housing 110.
[0051] In this embodiment, the insulating gasket 150 is a double-sided adhesive ring. One side of the double-sided adhesive ring is attached to the housing 110, and the other side is attached to the first conductive sheet 130. The double-sided adhesive ring can attach and fix the first conductive sheet 130 to the window 111 of the housing 110, so as to achieve a sealed connection of the first conductive sheet 130 to the window 111, and can also achieve insulation between the first conductive sheet 130 and the housing 110.
[0052] Of course, it is understandable that in another feasible embodiment, adhesive can be applied to both sides of the insulating gasket 150, and then one side of the insulating gasket 150 can be pasted to the housing 110 and the other side can be pasted to the first conductive sheet 130. The insulating gasket 150 can paste and fix the first conductive sheet 130 to the window 111 of the housing 110, thereby achieving a sealed connection of the first conductive sheet 130 to the window 111 and achieving insulation between the first conductive sheet 130 and the housing 110.
[0053] Please refer to the battery 100 provided in one embodiment of this utility model. Figure 1 , Figure 4 and Figure 5 The housing 110 includes a first half-shell 112 and a second half-shell 113, which can form a receiving cavity. A window 111 is formed in the first half-shell 112. Of course, it is understood that the window 111 can also be formed in the second half-shell 113.
[0054] When assembling the battery 100, a first active coating is first applied to a first current collector to prepare a first electrode, and a second active coating is applied to a second current collector to prepare a second electrode. The edge of the first current collector is exposed above the first active coating and forms a first tab, and the edge of the second current collector is exposed above the second active coating and forms a second tab. Then, the first and second electrodes are alternately stacked, with the first and second electrodes on the two outer sides of the electrode core 120 in the thickness direction, respectively. The stacked electrodes are thermally bonded to form the electrode core 120. The outer side of the first electrode located outside the electrode core 120 has a first void that is not covered by the first active coating. The foil area, located outside the second electrode sheet outside the electrode core 120, has a second empty foil area without a second active coating. The first electrode tab of each first electrode sheet is located on one side of the electrode core 120, and the second electrode tab of each second electrode sheet is located on the other side of the electrode core 120. Each first electrode tab of the electrode core 120 is connected to the first conductive sheet 130, and each second electrode tab is connected to the second conductive sheet 140. Then, double-sided adhesive rings are used to attach and fix the first conductive sheet 130 to the window 111 of the housing 110. The second conductive sheet 140 is electrically connected to the conductive part. Then, the electrode core 120 is placed in the receiving cavity. Finally, the first half-shell 112 and the second half-shell 113 are connected.
[0055] In this embodiment, the sidewalls of the first half-shell 112 and the second half-shell 113 are nested together, and the nested portions of the sidewalls of the first half-shell 112 and the second half-shell 113 are welded together using laser filler wire welding. The shell 110 is provided with an injection hole and a sealing member. The injection hole penetrates the sidewalls of the first half-shell 112 and the second half-shell 113. The sealing member is used to seal the injection hole and seal the connection of the shell 110. The injection hole facilitates the injection of electrolyte into the interior of the shell 110. After the electrolyte is injected into the interior of the shell 110, the sealing member is used to seal the injection hole to prevent electrolyte from flowing out.
[0056] A window 111 is formed in the first half-shell 112; at least the middle region of the side of the second half-shell 113 facing the window 111 protrudes into the receiving cavity to form an inner convex portion, which can enhance the strength of the second half-shell 113 and at the same time reserve expansion space. An upper concave cavity is formed between the inner convex portion and the side wall of the second half-shell 113.
[0057] In this embodiment, the shell 110 is a steel shell, the thickness of the first half shell 112 is D1, 0.1mm < D1 < 0.2mm; the thickness of the second half shell 113 is D2, 0.1mm < D2 < 0.15mm.
[0058] In addition, such as Figures 1 to 5 As shown, another embodiment of the present invention provides a terminal device, including a battery compartment and a battery 100 as provided in any of the above embodiments. The battery compartment has a placement cavity, and the battery 100 is installed in the placement cavity. The specific structure of the battery 100 is the same as described in the above embodiments. Since the present terminal device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0059] The terminal device provided in one embodiment of this utility model includes a battery compartment comprising a compartment body and a compartment cover, which together form a placement cavity; the compartment body and the compartment cover are fixed together by fasteners. The terminal device also includes a first conductive adhesive tape and a second conductive adhesive tape. The battery 100 is fixed to the placement cavity by the conductive adhesive tape, and the conductive adhesive tape can be electrically connected to the first conductive sheet 130 or the conductive part. The battery 100 supplies power to the terminal device through the conductive adhesive tape.
[0060] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. A battery, characterized in that, It includes a housing and an electrode core, wherein the housing forms a receiving cavity and the electrode core is disposed in the receiving cavity; At least a portion of the housing is configured as a conductive part, and a window is provided on the housing; The electrode core is provided with a first conductive sheet and a second conductive sheet on both outer sides, and the first conductive sheet and the second conductive sheet are both electrically connected to the electrode core, and the polarities of the first conductive sheet and the second conductive sheet are opposite. The first conductive sheet is sealed to the housing and closes the window, and the first conductive sheet is insulated from the housing. The second conductive sheet is electrically connected to the conductive part.
2. The battery according to claim 1, characterized in that, The electrode core includes a first electrode plate and a second electrode plate; The first electrode includes a first current collector and a first active coating disposed on the first current collector; The second electrode includes a second current collector and a second active coating disposed on the second current collector; The two outer sides of the electrode core in the thickness direction are the first electrode sheet and the second electrode sheet, respectively; the outer side of the first electrode sheet located outside the electrode core has a first empty foil area that is not covered by the first active coating; the outer side of the second electrode sheet located outside the electrode core has a second empty foil area that is not covered by the second active coating. The first conductive sheet is the first electrode sheet having the first empty foil area, or a conductive sheet stacked on the outside of the first empty foil area and electrically connected to the first electrode sheet; The second conductive sheet is the second electrode sheet having the second empty foil area, or a conductive sheet stacked on the outside of the second empty foil area and electrically connected to the second electrode sheet.
3. The battery according to claim 2, characterized in that, The electrode core is a wound electrode core. The first electrode sheet of the electrode core includes a plurality of first electrode tabs, each of which is located on one side of the electrode core. The second electrode sheet of the electrode core includes a plurality of second electrode tabs, each of which is located on the other side of the electrode core. Each of the first electrode tabs of the electrode core is connected to the first conductive sheet, and each of the second electrode tabs is connected to the second conductive sheet.
4. The battery according to claim 3, characterized in that, The electrode core is a stacked electrode core, which includes a plurality of first electrode plates and a plurality of second electrode plates. The first electrode tab of each first electrode plate is located on one side of the electrode core, and the second electrode tab of each second electrode plate is located on the other side of the electrode core. Each first electrode tab of the electrode core is connected to the first conductive plate, and each second electrode tab is connected to the second conductive plate.
5. The battery according to claim 4, characterized in that, The edge of the first current collector is exposed outside the first active coating and forms the first tab; The edge of the second current collector is exposed to the second active coating and forms the second tab.
6. The battery according to claim 4, characterized in that, The first conductive sheet is the first electrode sheet having the first empty foil area, and each of the first electrode tabs is connected to form a first electrode tab group; The second conductive sheet is a second electrode sheet having the second empty foil area, and each of the second electrode tabs is connected to form a second electrode tab group.
7. The battery according to claim 4, characterized in that, The first conductive sheet is a conductive sheet stacked on the outside of the first empty foil area. One end of the first conductive sheet is welded to each of the first tabs to form a first tab assembly. The part of the first conductive sheet exposed in the window is welded to the first empty foil area. The second conductive sheet is a conductive sheet stacked on the outside of the second empty foil area, and one end of the second conductive sheet is connected to each of the second tabs to form a second tab assembly; the second conductive sheet is welded to the housing.
8. The battery according to claim 6, characterized in that, The thickness of the first current collector of the first electrode with the first empty foil region is greater than or equal to the thickness of the first current collector of the remaining first electrodes; The thickness of the second current collector of the second electrode with the second empty foil region is greater than or equal to the thickness of the second current collector of the remaining second electrodes.
9. The battery according to claim 1, characterized in that, The pole core can be square, circular, annular, open annular, or triangular.
10. The battery according to claim 1, characterized in that, The battery also includes an insulating gasket located between the first conductive sheet and the housing, the insulating gasket being used to insulate the first conductive sheet and the housing.
11. The battery according to claim 10, characterized in that, The insulating gasket is a double-sided adhesive ring, with one side of the double-sided adhesive ring attached to the housing and the other side attached to the first conductive sheet.
12. The battery according to claim 1, characterized in that, The housing includes a first half-shell and a second half-shell, which can form the receiving cavity, and the window is opened in the first half-shell.
13. The battery according to claim 12, characterized in that, The sidewalls of the first half-shell and the sidewalls of the second half-shell are nested together.
14. The battery according to claim 13, characterized in that, The sidewalls of the first half-shell and the sidewalls of the second half-shell are welded together at the points where they are nested together.
15. The battery according to claim 12, characterized in that, The housing is provided with an injection hole and a sealing element. The injection hole penetrates the side wall of the first half-shell and the side wall of the second half-shell. The sealing element is used to block the injection hole and seal the connection of the housing.
16. The battery according to claim 12, characterized in that, The window is formed in the first half-shell; at least the middle region of the side of the second half-shell facing the window protrudes into the receiving cavity to form an inner convex portion.
17. The battery according to claim 16, characterized in that, An upper concave cavity is formed between the inner convex portion and the side wall of the second half-shell.
18. The battery according to claim 12, characterized in that, The shell is a steel shell, and the thickness of the first half shell is D1, 0.1mm < D1 < 0.2mm; The thickness of the second half-shell is D2, 0.1mm < D2 < 0.15mm.
19. A terminal device, characterized in that, It includes a battery compartment and a battery as claimed in any one of claims 1 to 18, wherein the battery compartment has a placement cavity in which the battery is mounted.
20. The terminal device according to claim 19, characterized in that, The battery compartment includes a compartment body and a compartment cover, the compartment body and the compartment cover forming the placement cavity; The chamber body and the chamber cover are fixed together by fasteners.
21. The terminal device according to claim 19, characterized in that, The terminal device further includes a first conductive adhesive tape and a second conductive adhesive tape. The battery is fixed to the placement cavity by the conductive adhesive tape, and the conductive adhesive tape can be conductively connected to the first conductive sheet or the conductive part. The battery supplies power to the terminal device through the conductive adhesive tape.