Battery, battery pack and electric equipment

Abstract

The utility model discloses a battery, a battery pack and electric equipment, the battery comprises a shell, a pole core, a pole lug and a guide pin, the pole core is accommodated in the shell, and the pole core comprises a positive plate and a negative plate; the tab is accommodated in the shell, the first end of the tab is connected with the negative plate, and the second end of the tab is connected to the inner wall of the shell; the guide pin is insulated from the shell, the first end of the guide pin is connected with the positive plate, and the second end of the guide pin extends out of the shell. According to the battery, the tab is connected between the negative plate and the inner wall of the shell, so that the pole core can be fixed on the shell, the overall connection stability of the pole core is improved, and the movement of the pole core in the use process of the battery is inhibited; the first end of the guide pin is connected with the positive plate, and the second end of the guide pin extends out of the shell, so that the pole core is connected with an external circuit through the guide pin and the shell, the current can smoothly flow into and out of the battery, and the battery can normally work and provide required power for electric equipment.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery, a battery pack and an electrical device. Background Art

[0002] With the development of science and technology, battery-powered devices are becoming more and more common in life. Existing batteries include various types such as lead-acid batteries and lithium batteries. Among them, lithium-ion batteries have been widely used in electric vehicles, mobile terminals, etc. due to their high energy density and environmental friendliness. The battery includes a positive electrode and a negative electrode, which collect the electrons generated by the electrochemical reaction and conduct them to the external circuit, thereby realizing the process of converting chemical energy into electrical energy.

[0003] In the related art, both the positive and negative electrodes of the battery are led out through pins, resulting in poor connection stability. Utility Model Content

[0004] The purpose of this application is to provide a battery, a battery pack and an electrical device to solve the problem of poor stability of the pole core connection.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a battery, comprising:

[0007] case;

[0008] A pole core is contained in the shell, and the pole core includes a positive pole sheet and a negative pole sheet;

[0009] A tab is accommodated in the shell, a first end of the tab is connected to the negative electrode sheet, and a second end of the tab is connected to the inner wall of the shell;

[0010] A guide needle is insulated from the shell, a first end of the guide needle is connected to the positive electrode sheet, and a second end of the guide needle extends out of the shell.

[0011] In combination with the first aspect, in a possible implementation, the first end of the pole lug is connected to the first end of the pole core along the axial direction, and the second end of the pole lug is connected to the inner wall of the first end of the shell along the axial direction;

[0012] The first end of the guide needle is connected to the second end of the pole core along the axial direction, and the second end of the guide needle extends out of the second end of the shell along the axial direction.

[0013] In combination with the first aspect, in a possible implementation, the housing includes a bottom cover and a side enclosure that are connected to each other, the side enclosure is arranged around the bottom cover, the side enclosure forms an opening, the bottom cover is connected to one end of the side enclosure that is axially away from the opening, and the guide pin is inserted into the opening;

[0014] The first end of the pole lug is connected to the first end of the pole core along the axial direction, and the second end of the pole lug is connected to the bottom cover.

[0015] In combination with the first aspect, in a possible implementation, the battery also includes a first insulating member, the second end of the shell along the axial direction is provided with an opening, the first insulating member is accommodated in the shell and blocks the opening, the first insulating member is connected between the second end of the pole core along the axial direction and the inner wall of the shell, the first insulating member is provided with a first through hole, and the guide pin is inserted in the first through hole.

[0016] In combination with the first aspect, in a possible implementation manner, the guide needle is interference fit with the first through hole.

[0017] In combination with the first aspect, in a possible implementation, the guide needle includes a conductive member and a pin, the first end of the conductive member is connected to the positive electrode sheet, the second end of the conductive member is inserted into the first through hole, the first end of the pin is connected to the second end of the conductive member, and the second end of the pin extends out of the shell.

[0018] In combination with the first aspect, in a possible implementation manner, a slot is provided at the second end of the conductive member, and the pin is inserted into the slot.

[0019] In combination with the first aspect, in a possible implementation, the shell includes a connected bottom cover and a side surround, the side surround is arranged around the bottom cover, and an abutment portion is protruded radially inwardly along the shell at one end of the side surround away from the bottom cover, and the first insulating member abuts against the abutment portion and the pole core.

[0020] In combination with the first aspect, in a possible implementation, the side enclosure is provided with a protrusion protruding radially inwardly of the shell, the protrusion is provided between the abutting portion and the bottom cover, and the first insulating member abuts against the protrusion.

[0021] In combination with the first aspect, in a possible implementation, the battery further includes a second insulating member connected between the first end of the pole core along the axial direction and the bottom cover, and a second through hole is provided on the second insulating member, and the pole ear is inserted into the second through hole.

[0022] In combination with the first aspect, in a possible implementation, the battery further includes a glue layer, wherein the glue layer is sleeved on the pole core, and the glue layer is disposed between the pole core and the shell.

[0023] In combination with the first aspect, in a possible implementation, the battery is a cylindrical battery.

[0024] In a second aspect, the present application further provides a battery pack, comprising a plurality of batteries as described in the first aspect, wherein the plurality of batteries are electrically connected.

[0025] In a third aspect, the present application further provides an electrical device, comprising the battery pack as described in the second aspect.

[0026] In the present application, the electrode core includes a positive electrode sheet and a negative electrode sheet, and the first end of the electrode ear is connected to the negative electrode sheet, and the second end of the electrode ear is connected to the inner wall of the shell, that is, the electrode ear is connected between the negative electrode sheet and the inner wall of the shell, so that the electrode core can be fixed on the shell, thereby improving the overall connection stability of the electrode core and inhibiting the movement of the electrode core during the use of the battery; and the first end of the guide needle is connected to the positive electrode sheet, and the second end of the guide needle extends out of the shell, so that the electrode core is connected to the external circuit through the guide needle and the shell, ensuring that the current can flow into and out of the battery smoothly, so that the battery can work normally and provide the required power for the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A cross-sectional view of a battery according to an embodiment of the present application;

[0029] Figure 2 This is a structural schematic diagram of a pole core in an expanded state according to an embodiment of the present application;

[0030] Figure 3 This is a schematic structural diagram of a shell and a pole core according to an embodiment of the present application;

[0031] Figure 4 This is a schematic structural diagram of an adhesive layer and a second insulating member according to an embodiment of the present application;

[0032] Figure 5 This is a schematic structural diagram of a first insulating member in one embodiment of the present application;

[0033] Figure 6An exploded view of a guide needle according to an embodiment of the present application;

[0034] Figure 7 A cross-sectional view of a housing according to an embodiment of the present application;

[0035] Figure 8 It is a schematic diagram of the structure of a pole ear according to an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 100, battery; 110, shell; 111, opening; 112, bottom cover; 113, side enclosure; 113a, abutment portion; 113b, raised portion; 120, pole core; 121, positive electrode sheet; 122, negative electrode sheet; 123, diaphragm; 130, pole ear; 131, first end of the pole ear; 132, second end of the pole ear; 140, guide pin; 140a, first end of the guide pin; 140b, second end of the guide pin; 141, conductive member; 141a, slot; 141b, first connecting portion; 141c, second connecting portion; 142, pin; 150, adhesive layer; 160, first insulating member; 161, first through hole; 170, second insulating member; 171, second through hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0041] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] The present application provides an electric device, which includes a frame and a battery pack, wherein the battery pack is mounted on the frame, and the battery pack supplies power to the electric device to drive the electric device to work. The electric device includes a mobile phone, a tablet computer, a sweeper, and an electric vehicle, and the electric device can be powered by a built-in battery pack so as to work without an external power supply.

[0043] A battery pack includes multiple batteries. Since the voltage and capacity of a single battery are limited, the overall voltage and capacity of the battery pack can be increased by connecting multiple batteries in series and / or in parallel to meet the high energy requirements of applications such as electric vehicles. In addition, a battery pack composed of multiple batteries can disperse the load of current and voltage, reduce the working pressure of a single battery, and thus improve the overall performance and stability of the battery module. Among them, a single battery can be a lithium-ion battery, a sodium-ion battery, or a nickel-metal hydride battery.

[0044] refer to Figure 1 and Figure 2 The present application provides a battery 100, which includes a shell 110, a pole core 120, a pole ear 130 and a guide needle 140. The pole core 120 is accommodated in the shell 110, and the pole core 120 includes a positive electrode sheet 121 and a negative electrode sheet 122; the pole ear 130 is accommodated in the shell 110, and the first end 131 of the pole ear 130 is connected to the negative electrode sheet 122, and the second end 132 of the pole ear 130 is connected to the inner wall of the shell 110; the guide needle 140 is insulated from the shell 110, and the first end 140a of the guide needle 140 is connected to the positive electrode sheet 121, and the second end 140b of the guide needle 140 extends out of the shell 110. Specifically, the housing 110 is made of metal to achieve electrical connection between the negative electrode sheet 122 and the housing 110; the pole core 120 also includes a diaphragm 123, which is arranged between the positive electrode sheet 121 and the negative electrode sheet 122, and the positive electrode sheet 121, the diaphragm 123 and the negative electrode sheet 122 are stacked. An electrolyte is injected into the housing 110 of the battery 100. The electrolyte is an ion conductor in the battery 100, which is responsible for transferring ions between the positive and negative electrodes, thereby maintaining the charge and discharge process of the battery 100. The electrons generated by the electrochemical reaction are collected by the positive electrode sheet 121 and the negative electrode sheet 122 and conducted to the external circuit, thereby realizing the process of converting chemical energy into electrical energy.

[0045] In the present application, the electrode core 120 further includes a diaphragm 123 , and the diaphragm 123 is disposed on the positive electrode sheet 121 , and the negative electrode sheet 122 and the diaphragm 123 are wound to form a winding core structure. The first end of the pole ear 130 is connected to the negative electrode sheet 122, and the second end of the pole ear 130 is connected to the inner wall of the shell 110, that is, the pole ear 130 is connected between the negative electrode sheet 122 and the inner wall of the shell 110, so that the pole core 120 can be fixed on the shell 110, thereby improving the overall connection stability of the pole core 120 and inhibiting the pole core 120 from moving during the use of the battery 100; and the first end 140a of the guide needle 140 is connected to the positive electrode sheet 121, and the second end 140b of the guide needle 140 extends out of the shell 110, so that the pole core 120 is connected to the external circuit through the guide needle 140 and the shell 110, ensuring that the current can flow into and out of the battery 100 smoothly, so that the battery 100 can work normally and provide the required power for the electrical equipment.

[0046] In lithium-ion batteries, the active materials on the positive electrode sheet 121 include but are not limited to transition metal oxides, polyanion compounds, Prussian blue compounds, such as lithium cobalt oxide, lithium iron phosphate, sodium iron pyrophosphate, etc.; the active materials on the negative electrode sheet 122 include but are not limited to graphite, hard carbon or silicon, etc.

[0047] The battery 100 provided in the present application may be a cylindrical battery, a square battery, a soft-pack battery, etc., without limitation. The present application embodiment takes the battery 100 as a cylindrical battery for illustration.

[0048] refer to Figure 1 , Figure 3 and Figure 4 The shell 110 is cylindrically arranged, and the pole core 120 is wound by a winding device to form a cylindrical winding core, so that the pole core 120 can be installed in the shell 110. The first end 131 of the pole ear 130 is connected to the first end of the pole core 120 along the axial direction X, and the second end 132 of the pole ear 130 is connected to the inner wall of the first end of the shell 110 along the axial direction X; the first end 140a of the guide pin 140 is connected to the second end of the pole core 120 along the axial direction X, and the second end 140b of the guide pin 140 extends out of the second end of the shell 110 along the axial direction X. Specifically, the first end of the pole core 120 along the axial direction X is connected to the shell 110 through the pole ear 130, which can fix the first end of the pole core 120 and improve the stability of the connection of the pole core 120. The tabs 130 and the guide pins 140 are respectively connected to the two ends of the pole core 120 along the axial direction X, so that the negative electrode sheet 122 is connected to the tabs 130 and the positive electrode sheet 121 is connected to the guide pins 140 to connect to the external circuit.

[0049] Optionally, a rubber layer 150 is sleeved on the pole core 120 to shape the wound pole core 120, prevent the wound core from loosening after being taken out of the winding device, and facilitate the pole core 120 to be loaded into the shell 110. After the pole core 120 is loaded into the shell 110, the rubber layer 150 is arranged between the pole core 120 and the shell 110, so as to achieve insulation between the pole core 120 and the shell 110.

[0050] refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 In the battery 100 provided in the present application, the battery 100 further includes a first insulating member 160, an opening 111 is provided at the second end of the shell 110 along the axial direction X, the first insulating member 160 is received in the shell 110 and blocks the opening 111, the first insulating member 160 is connected between the second end of the pole core 120 along the axial direction X and the inner wall of the shell 110, the first insulating member 160 is provided with a first through hole 161, and the guide pin 140 is inserted into the first through hole 161. Specifically, the pole core 120 is installed in the shell 110 through the opening 111, the opening 111 of the shell 110 is blocked by the first insulating member 160, and the first sealing member is connected between the second end of the pole core 120 and the shell 110 to fix the second end of the pole core 120, so as to further improve the stability of the connection of the pole core 120. The guide pin 140 is inserted into the first through hole 161 to achieve the fixation of the guide pin 140, so as to improve the stability of the guide pin 140 when connected to the external circuit.

[0051] Among them, the first insulating part 160 is elastic, and the material of the first insulating part 160 is an insulating material. The material of the first insulating part 160 can be but is not limited to plastic, rubber or silicone; specifically, it can be fluororubber, nitrile rubber, silicone rubber, hydrogenated nitrile rubber, polyurethane, polytetrafluoroethylene, polypropylene, etc.

[0052] In one embodiment, the guide pin 140 is interference-fitted with the first through hole 161 to improve the stability of the installation of the guide pin 140. Specifically, the guide pin 140 includes a conductive member 141 and a pin 142, the first end of the conductive member 141 is connected to the positive electrode sheet 121, the second end of the conductive member 141 is inserted into the first through hole 161, the first end of the pin 142 is connected to the second end of the conductive member 141, and the second end of the pin 142 extends out of the housing 110. The conductive member 141 is welded to the positive electrode sheet 121 to achieve electrical connection between the conductive member 141 and the positive electrode sheet 121, and then the current on the positive electrode sheet 121 is led out through the connection between the pin 142 and the conductive member 141, and a loop is formed after connecting with an external circuit.

[0053] In the battery 100 provided in the present application, the positive electrode sheet 121 is led out through a guide needle 140 . The guide needle 140 has a simple structure and is easy to implement, thereby improving production efficiency.

[0054] Among them, a slot 141a is provided at the second end of the conductive member 141, and the pin 142 is inserted into the slot 141a, that is, the pin 142 and the conductive member 141 cooperate through the slot 141a to increase the contact area between the pin 142 and the conductive member 141, so that the pin 142 and the conductive member 141 are firmly connected. The length of the pin 142 is in the range of 0.8mm to 1.2mm. The conductive member 141 includes a first connecting portion 141b and a second connecting portion 141c connected to each other. The first connecting portion 141b is arranged in a strip shape. The first connecting portion 141b is inserted into the pole core 120 to be connected to the positive electrode sheet 121. The width of the first connecting portion 141b is in the range of 2mm to 4mm, and the thickness is in the range of 0.1mm to 0.3mm. The slot 141a is arranged on the second connecting portion 141c to be connected to the pin 142. The diameter of the second connecting portion 141c is in the range of 1.5mm to 2.0mm. The second connecting portion 141c is accommodated in the first through hole 161 of the first insulating member 160. The diameter of the first through hole 161 is 1.2mm to 1.4mm to achieve an interference fit between the second connecting portion 141c and the first through hole 161, thereby improving the installation stability of the conductive member 141 and improving the sealing of the battery 100.

[0055] refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8In the battery 100 provided in the present application, the housing 110 includes a bottom cover 112 and a side enclosure 113 connected to each other. The side enclosure 113 is arranged around the bottom cover 112. An end of the side enclosure 113 away from the bottom cover 112 is provided with an abutment portion 113a protruding inwardly along the radial direction of the housing 110. The first insulating member 160 abuts against the abutment portion 113a and the pole core 120. Specifically, the side enclosure 113 surrounds an opening 111, the bottom cover 112 is connected to an end of the side enclosure 113 away from the opening 111 in the axial direction, the guide pin 140 is inserted into the opening 111, the first end of the pole lug 130 is connected to the first end of the pole core 120 in the axial direction, and the second end of the pole lug 130 is connected to the bottom cover 112. Among them, the abutment portion 113a and the bottom cover 112 are respectively arranged at the two ends of the shell 110 along the axial direction, the first end 131 of the pole ear 130 and the second end 132 of the pole ear 130 are welded to the negative electrode sheet 122 and the bottom cover 112 respectively, and the pole ear 130 can use aluminum strip or nickel strip. The pole ear 130 is connected to the shell 110 by penetration welding or resistance welding, so that one end of the pole core 120 is fixed on the bottom cover 112; and the first insulating member 160 is fixed between the other end of the pole core 120 and the abutment portion 113a, so as to fix the other end of the pole core 120 on the side wall 113, so as to fix the two ends of the pole core 120 as a whole, improve the stability of the connection of the pole core 120, and inhibit the pole core 120 from moving during the use of the battery 100. An abutment portion 113 a is protruded from one end of the side enclosure 113 away from the bottom cover 112 to restrict the first insulating member 160 in the housing 110 and prevent the first insulating member 160 from escaping from the housing 110 .

[0056] In one embodiment, the side 113 is provided with a protrusion 113b protruding inwardly along the radial direction of the shell 110, and the protrusion 113b is arranged between the abutment portion 113a and the bottom cover 112, and the first insulating member 160 abuts against the protrusion 113b; the protrusion 113b abuts against the radial outer peripheral wall of the first insulating member 160, so that both ends of the first insulating member 160 along the axial direction X and the radial outer peripheral wall are fixed, further improving the firmness of the installation of the first insulating member 160. Among them, the first insulating member 160 can be installed in the shell 110 by rolling and sealing to achieve the sealing of the opening 111. The protrusion 113b can be integrally formed when the shell 110 is manufactured; or after the shell 110 is manufactured, the first insulating member 160 is installed in the shell, and then extruded on the outside of the shell 110, including rolling, molding, etc., without specific limitation.

[0057] In the battery 100 provided in the present application, the battery 100 further includes a second insulating member 170, which is connected between the first end of the pole core 120 along the axial direction X and the bottom cover 112, and a second through hole 171 is provided on the second insulating member 170, and the pole tab 130 is inserted into the second through hole 171. Specifically, by providing the second insulating member 170 between the pole core 120 and the bottom cover 112, heat insulation and insulation between the pole core 120 and the housing 110 are achieved. One end of the pole tab 130 is connected to the negative electrode sheet 122, and the other end of the pole tab 130 passes through the second through hole 171 to be connected to the bottom cover 112 of the housing 110.

[0058] The material of the second insulating member 170 is insulating material. The material of the second insulating member 170 may be, but is not limited to, plastic, rubber or silicone; specifically, it may be fluororubber, nitrile rubber, silicone rubber, hydrogenated nitrile rubber, polyurethane, polytetrafluoroethylene, polypropylene, etc.

[0059] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0060] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A battery, characterized in that: include: case; A pole core is contained in the shell, and the pole core includes a positive pole sheet and a negative pole sheet; A tab is accommodated in the shell, a first end of the tab is connected to the negative electrode sheet, and a second end of the tab is connected to the inner wall of the shell; A guide needle is insulated from the shell, a first end of the guide needle is connected to the positive electrode sheet, and a second end of the guide needle extends out of the shell.

2. The battery according to claim 1, characterized in that The first end of the pole lug is connected to the first end of the pole core along the axial direction, and the second end of the pole lug is connected to the inner wall of the first end of the shell along the axial direction; The first end of the guide needle is connected to the second end of the pole core along the axial direction, and the second end of the guide needle extends out of the second end of the shell along the axial direction.

3. The battery according to claim 1, characterized in that The housing comprises a bottom cover and a side enclosure connected to each other, wherein the side enclosure is arranged around the bottom cover, the side enclosure forms an opening, the bottom cover is connected to one end of the side enclosure axially away from the opening, and the guide pin is inserted into the opening; The first end of the pole lug is connected to the first end of the pole core along the axial direction, and the second end of the pole lug is connected to the bottom cover.

4. The battery according to claim 2, characterized in that The battery also includes a first insulating member, the second end of the shell along the axial direction is provided with an opening, the first insulating member is accommodated in the shell and blocks the opening, the first insulating member is connected between the second end of the pole core along the axial direction and the inner wall of the shell, the first insulating member is provided with a first through hole, and the guide pin is inserted in the first through hole.

5. The battery according to claim 4, characterized in that The guide pin is interference fit with the first through hole.

6. The battery according to claim 4, characterized in that The guide needle includes a conductive member and a pin, the first end of the conductive member is connected to the positive electrode sheet, the second end of the conductive member is inserted into the first through hole, the first end of the pin is connected to the second end of the conductive member, and the second end of the pin extends out of the shell.

7. The battery according to claim 6, characterized in that A slot is provided at the second end of the conductive member, and the pin is inserted into the slot.

8. The battery according to claim 4, characterized in that The shell comprises a bottom cover and a side surround which are connected to each other. The side surround is arranged around the bottom cover. An abutment portion is protruded radially inwardly of the shell at one end of the side surround away from the bottom cover. The first insulating member abuts against the abutment portion and the pole core.

9. The battery according to claim 8, characterized in that The side enclosure is provided with a protrusion protruding inwardly along the radial direction of the shell, the protrusion is arranged between the abutting portion and the bottom cover, and the first insulating member abuts against the protrusion.

10. The battery according to claim 8, characterized in that The battery further includes a second insulating member connected between the first end of the pole core along the axial direction and the bottom cover, and a second through hole is provided on the second insulating member, and the pole tab is inserted into the second through hole.

11. The battery according to claim 1, characterized in that The battery further comprises a glue layer, which is sleeved on the pole core and arranged between the pole core and the shell.

12. The battery according to any one of claims 1 to 11, characterized in that: The battery is a cylindrical battery.

13. A battery pack, characterized in that: The invention comprises a plurality of batteries according to any one of claims 1 to 12, wherein the plurality of batteries are electrically connected.

14. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 13.

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