CN106099220B - Battery and electronic equipment - Google Patents
Battery and electronic equipment Download PDFInfo
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- CN106099220B CN106099220B CN201610510004.3A CN201610510004A CN106099220B CN 106099220 B CN106099220 B CN 106099220B CN 201610510004 A CN201610510004 A CN 201610510004A CN 106099220 B CN106099220 B CN 106099220B
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- sheet layer
- battery
- electrode sheet
- negative electrode
- metal sheet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
Abstract
The invention discloses a battery and electronic equipment, which are used for solving the technical problem that the potential of a negative electrode sheet layer of the battery cannot be acquired in the prior art. The battery includes: the battery cell consists of a roll core and a sealing film; the winding core is formed by curling a negative electrode sheet layer, a first metal sheet layer, a first isolating film, a positive electrode sheet layer and a second isolating film together according to the circumference; the sealing film wraps the roll core; the first metal sheet layer and the negative electrode sheet layer are used for generating a target voltage value; a protection circuit board connected with the first metal sheet layer and the negative electrode sheet layer; for obtaining the target voltage value.
Description
Technical Field
The present application relates to the field of battery technology, and in particular, to a battery and an electronic device.
Background
The existing battery comprises the following components: the separator is used for separating the positive electrode sheet layer from the negative electrode sheet layer, and short circuit caused by contact of the positive electrode sheet layer and the negative electrode sheet layer is avoided.
In the prior art, when the electronic device charges the battery, the electronic device can only acquire the voltage between the positive electrode sheet layer and the negative electrode sheet layer, the voltage is a difference value between the potential of the positive electrode sheet layer and the potential of the negative electrode sheet layer, and cannot reflect the potential on the negative electrode sheet layer, and in the charging process, the potential of the negative electrode sheet layer of the battery may be 0V (volt), under the condition, a crystallization effect can occur on the negative electrode sheet layer, and metal crystals on the negative electrode sheet layer can pierce through the isolation membrane to cause the electrical connection of the positive electrode sheet layer and the negative electrode sheet layer to cause short circuit, damage the battery, and threaten the personal safety.
As can be seen from the above, the prior art cannot acquire the potential of the negative electrode sheet layer of the battery, so that measures cannot be taken to avoid the possible risks.
Disclosure of Invention
The embodiment of the invention provides a battery and electronic equipment, which are used for solving the technical problem that the potential of a negative electrode plate layer of the battery cannot be acquired in the prior art.
In order to achieve the above object, the embodiment of the present invention provides the following specific technical solutions:
in a first aspect, a battery is provided, the battery comprising:
the battery cell consists of a roll core and a sealing film;
the winding core is formed by curling a negative electrode sheet layer, a first metal sheet layer, a first isolating film, a positive electrode sheet layer and a second isolating film together according to the circumference; the sealing film wraps the roll core;
the first metal sheet layer and the negative electrode sheet layer are used for generating a target voltage value;
a protection circuit board connected with the first metal sheet layer and the negative electrode sheet layer; for obtaining the target voltage value, wherein the target voltage value is indicative of the potential of the negative electrode slice.
Optionally, the first metal sheet layer is located between the negative electrode sheet layer and the first separator to prevent crystals generated by the negative electrode sheet layer from penetrating the first separator to form an electrical connection with the positive electrode sheet layer to cause a short circuit.
Optionally, the hierarchical relationship of the winding core is, in order, the negative electrode sheet layer, the first metal sheet layer, the first isolation film, the positive electrode sheet layer, and the second isolation film.
Optionally, the jellyroll further comprises a second metal sheet layer located between the first separator film and the positive electrode sheet layer.
Optionally, the protection circuit board is configured to generate a suspension instruction when it is determined that the target voltage value satisfies a voltage threshold, where the suspension instruction is used to instruct a charging control chip of an electronic device having the battery to stop charging the battery.
Optionally, the metal sheet is an aluminum sheet or a copper sheet.
Optionally, the positive electrode sheet layer is lithium cobaltate LiCoO 2; the negative electrode sheet layer is carbon C.
In another aspect, an electronic device is provided, which includes:
a housing;
a battery located within the housing, the battery being as provided in the first aspect above.
Optionally, the electronic device further comprises:
the charging device is used for acquiring charging current to charge the battery;
and the charging control chip is used for controlling the charging device to charge the battery.
Optionally, the charging control chip is specifically configured to: and receiving a stopping instruction generated when the protection circuit board of the battery determines that the target voltage value meets a voltage threshold value, and executing the stopping instruction to enable the charging device to stop charging the battery.
By adopting the scheme, the first metal sheet layer and the negative electrode sheet layer in the battery are used for generating the target voltage value; the protection circuit board is connected with the first metal sheet layer and the negative electrode sheet layer; for obtaining the target voltage value. The target voltage value shows the potential of the negative electrode sheet layer, and the technical problem that the potential of the negative electrode sheet layer cannot be acquired in the prior art is solved, so that the electronic equipment comprising the battery can control the charging of the battery according to the negative electrode sheet layer, further the crystallization of the negative electrode sheet layer cannot occur, and the risk that the crystallization pierces the isolating membrane to cause the damage of the battery is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery roll core in the prior art;
fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 3a is a schematic structural diagram of a winding core according to an embodiment of the present invention;
FIG. 3b is a schematic structural diagram of another winding core provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another winding core provided by an embodiment of the invention;
FIG. 5 is a schematic structural diagram of another winding core provided by an embodiment of the invention;
fig. 6 is a schematic structural diagram of another battery according to an embodiment of the present invention;
fig. 7a is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 7b is a schematic structural diagram of another electronic device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a mobile phone according to an embodiment of the present invention.
Detailed Description
In order to make it easier for those skilled in the art to understand the technical solutions provided by the embodiments of the present invention, the following first introduces related technical terms related to the embodiments of the present invention.
Cell crystallization refers to the phenomenon in which crystalline particles are generated in the negative electrode sheet of a cell during charging. The principle of battery crystallization is illustrated with a lithium ion battery:
the positive electrode material of the lithium ion battery usually consists of lithium active compounds, the negative electrode is carbon with a special molecular structure, the main component of the common positive electrode material is lithium cobaltate LiCoO2, during charging, the potential added at the two poles of the battery forces the positive electrode compound to release lithium ions, and the lithium ions are embedded into the carbon with the negative electrode molecular arrangement in a lamellar structure, during charging, when the potential of the negative electrode is 0V, the lithium ions cannot be embedded into the carbon with the negative electrode lamellar structure, at the moment, the lithium ions are attached to the negative electrode lamellar layer due to continuous charging, and crystallization occurs, namely, the crystallization on the negative electrode lamellar layer of the battery is caused by overcharging of the battery.
The damage of crystallization on the negative electrode sheet is described below. Fig. 1 is a schematic structural diagram of a battery roll core in the prior art, which includes a positive electrode sheet 1, a first isolation film 2, a negative electrode sheet 3, and a second isolation film 4, wherein the positive electrode sheet 1, the first isolation film 2, the negative electrode sheet 3, and the second isolation film 4 are stacked in sequence, and the wound negative electrode sheet 3 is wrapped by the first isolation film 2 and the second isolation film 4, so as to avoid contact with the positive electrode sheet 1. In the case of crystals on the negative electrode sheet 3, the crystals may pierce the first and second separators 2 and 4, causing an electrical short between the negative electrode sheet 3 and the positive electrode sheet 1, resulting in destruction of the battery.
The embodiment of the invention provides a battery and an electronic device, wherein the battery comprises: the battery cell consists of a roll core and a sealing film; the winding core is formed by curling a negative electrode sheet layer, a first metal sheet layer, a first isolating film, a positive electrode sheet layer and a second isolating film together according to the circumference; the sealing film wraps the roll core; the first metal sheet layer and the negative electrode sheet layer are used for generating a target voltage value; and the protection circuit board is connected with the first metal sheet layer and the negative electrode sheet layer and is used for obtaining the target voltage value. The technical problem that the potential of a negative electrode sheet layer of a battery cannot be acquired in the prior art is solved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a battery 20, as shown in fig. 2, where the battery 20 includes:
the battery cell 21, the battery cell 21 is composed of a winding core 211 and a sealing film 212;
wherein, the sealing film can be an aluminum-plastic composite film.
The winding core 211 is formed by curling a negative electrode sheet layer 2111, a first metal sheet layer 2112, a first isolation film 2113, a positive electrode sheet layer 2114 and a second isolation film 2115 together according to the circumference; the sealing film 212 wraps around the core 211;
the first metal sheet layer 2112 and the negative electrode sheet layer 2111 are used for generating a target voltage value;
and the protection circuit board 22, wherein the protection circuit board 22 is connected with the first metal sheet layer 2112 and the negative electrode sheet layer 2111, and is used for obtaining the target voltage value.
The potential of the first metal sheet layer 2112 is always 0, so that the target voltage value between the negative electrode sheet layer 2111 and the first metal sheet layer 2112 is the potential of the negative electrode sheet layer.
Therefore, the electronic device including the battery 20 can obtain the potential of the negative electrode sheet layer of the battery based on the protection circuit board 22, so that the negative electrode sheet layer can not be crystallized, and the risk that the crystallization pierces the isolation film to damage the battery is avoided.
It should be noted that fig. 1 is only an example, and the first metal sheet layer 2112 is shown to be located between the negative electrode sheet layer 2111 and the first separation film 2113, and in an implementation, the first metal sheet layer 2112 may be located at any layer of the winding core 211, which is not limited by the invention.
The battery 20 can prevent the separator from being punctured to cause a short circuit in two ways, which will be described in detail below.
First, as shown in fig. 3a, the first sheet metal layer 2112 is located between the negative electrode sheet layer 2111 and the first separator 2113 to prevent the crystals generated by the negative electrode sheet layer from piercing the first separator to form an electrical connection with the positive electrode sheet layer and causing a short circuit.
That is, in practical implementation, the first metal sheet layer 2112 is located between the negative electrode sheet layer 2111 and the first isolation film 2113, so that the effect of preventing the crystals on the negative electrode sheet layer from penetrating through the isolation film can be further achieved, and thus, even if the negative electrode sheet layer generates crystals during charging, the crystals cannot penetrate through the first metal sheet layer, and further, the electrical connection between the negative electrode sheet layer and the positive electrode sheet layer cannot be caused.
Fig. 3b is a cross-sectional view of the winding core 211, which shows the winding condition of each layer included in the winding core 211 in detail, wherein the winding core 211 sequentially has a hierarchical relationship among the negative electrode sheet layer 2111, the first metal sheet layer 2112, the first separation film 2113, the positive electrode sheet layer 2114, and the second separation film 2115.
It is noted that the negative electrode sheet layer 2111 and the first metal sheet layer 2112 cannot be connected, and the winding core 211 shown in fig. 3a has a gap between the negative electrode sheet layer 2111 and the first metal sheet layer 2112. In specific implementation, in order to ensure that the negative electrode sheet layer 2111 is not in contact with the first metal sheet layer 2112, a third isolation film 2116 may be added between the negative electrode sheet layer and the first metal sheet layer, that is, as shown in fig. 3b, the winding core 211 has a hierarchical relationship of the negative electrode sheet layer 2111, the third isolation film 2116, the first metal sheet layer 2112, the first isolation film 2113, the positive electrode sheet layer 2114, and the second isolation film 2115 in sequence.
In a possible implementation manner of the embodiment of the present invention, as shown in fig. 4, the winding core 211 further includes a second metal sheet layer 2117, and the second metal sheet layer 2117 is located between the first separation film and the positive electrode sheet layer.
Fig. 4 is a cross-sectional view of the winding core 211, which shows the winding condition of each layer included in the winding core 211 in detail, wherein the winding core 211 sequentially has a hierarchical relationship among the negative electrode sheet layer 2111, the first metal sheet layer 2112, the first separation film 2113, the second metal sheet layer 2117, the positive electrode sheet layer 2114, and the second separation film 2115.
Similarly, a fourth isolation film 2118 may also be added between the second metal sheet layer 2117 and the positive electrode sheet layer, that is, the winding core 211 may have a hierarchical relationship among the negative electrode sheet layer 2111, the first metal sheet layer 2112, the first isolation film 2113, the second metal sheet layer 2117, the fourth isolation film 2118, the positive electrode sheet layer 2114, and the second isolation film 2115 in sequence.
Preferably, a winding core 211 as shown in fig. 5 may be used in implementation, and the layered relationship of the winding core 211 is, in order, the negative electrode sheet layer 2111, the third separation film 2116, the first metal sheet layer 2112, the first separation film 2113, the second metal sheet layer 2117, the fourth separation film 2118, the positive electrode sheet layer 2114, and the second separation film 2115.
It is worth mentioning that except for the situation that crystals exist on the negative electrode sheet layer to pierce the isolation film, burrs on the positive electrode sheet layer and the negative electrode sheet layer may also pierce the isolation film, the burrs are generated in the processing process of the electrode sheet layer, due to the limitation of the manufacturing process, burrs may still exist on the currently manufactured electrode sheet, and if the electrode sheet with the burrs is adopted and no metal sheet layer exists, in the using process, the burrs are likely to pierce the isolation film between the positive electrode sheet layer and the negative electrode sheet layer to cause short circuit. According to the embodiment of the invention, the winding core shown in fig. 5 is adopted, so that not only is crystal puncture on the negative electrode sheet layer avoided, but also burrs on the positive and negative electrode sheet layers are prevented from being punctured, and the safety of the battery is improved.
In a second mode, the protection circuit board 22 is specifically configured to generate a suspension instruction when it is determined that the target voltage value meets the voltage threshold, where the suspension instruction is used to instruct a charging control chip of the electronic device having the battery to stop charging the battery.
For example, as shown in fig. 6, the first metal sheet layer is grounded, so that the potential of the first metal sheet layer 2112 is always 0V, and the target voltage value between the negative electrode sheet layer 2111 and the first metal sheet layer 2112 is the potential of the negative electrode sheet layer 2111, as shown in fig. 6, one end of the protection circuit board 22 is connected to the negative electrode sheet layer 2111, and the other end is connected to the first metal sheet layer 2112, so that the voltage measured at the two ends of the protection circuit board 22 is the target voltage value.
It should be noted that, in the embodiment of the present invention, the target voltage value is equal to the potential of the negative electrode layer minus the potential of the first metal sheet layer, and since the potential of the first metal sheet layer is 0, the target voltage value is the potential of the negative electrode layer. If the target voltage value is understood to be equal to the potential of the first metal sheet layer minus the potential of the negative electrode sheet layer, the negative number of the target voltage value is the potential of the negative electrode sheet layer.
The voltage threshold may be 0V, and when the protection circuit board 22 determines that the target voltage value between the first metal sheet layer 2112 and the negative electrode sheet layer 2111 is 0V, it indicates that the potential of the negative electrode sheet layer is also 0V at this time, in this case, continuing charging will cause crystallization of the negative electrode sheet layer, so that the protection circuit board 22 may send a stop instruction to the electronic device that charges the battery, instruct the electronic device to stop charging the battery, avoid crystallization of the negative electrode sheet layer, and further avoid a short circuit caused by a barrier film being punctured by a crystal.
The voltage threshold may be preset according to an actual requirement, for example, the voltage threshold may also be a negative number, which is not limited in the present invention. Preferably, in a case that the target voltage value is equal to the potential of the negative electrode sheet layer minus the potential of the first metal sheet layer, the voltage threshold according to the embodiment of the present invention may be in a range of: [ -1.5V, 0V ].
It should be noted that the metal sheet described in the embodiment of the present invention may be an aluminum sheet, a copper sheet, or a sheet layer made of other metal materials, which is not limited in the present invention.
In addition, the battery 20 provided by the embodiment of the present invention may be a lithium ion battery, in this case, the material of the positive electrode sheet layer 2114 of the battery 20 is lithium cobaltate LiCoO2, and the material of the negative electrode sheet layer 2111 is carbon C.
By adopting the battery, the first metal sheet layer added in the battery can prevent crystals on the negative electrode sheet layer from piercing to cause the negative electrode sheet layer to be electrically connected with the positive electrode sheet layer to cause short circuit, and can also generate a target voltage value used for reflecting the potential of the negative electrode sheet layer together with the negative electrode sheet layer, so that the protective circuit board can ensure that the negative electrode sheet layer cannot crystallize after acquiring the target voltage value, thereby solving the technical problem that the potential of the negative electrode sheet layer cannot be acquired in the prior art and avoiding the risk that the crystals pierce the isolating membrane to cause the damage to the battery.
An embodiment of the present invention further provides an electronic device 70, as shown in fig. 7a, the electronic device includes:
a housing 71;
a battery 20 located within the housing 71, the battery 20 comprising: the battery cell consists of a roll core and a sealing film; the winding core is formed by curling a negative electrode sheet layer, a first metal sheet layer, a first isolating film, a positive electrode sheet layer and a second isolating film together according to the circumference; the sealing film wraps the roll core; the first metal sheet layer and the negative electrode sheet layer are used for generating a target voltage value; a protection circuit board connected to the first metal sheet layer and the negative electrode sheet layer for obtaining the target voltage value, which indicates a potential of the negative electrode sheet layer.
Optionally, the first metal sheet layer is located between the negative electrode sheet layer and the first separator to prevent crystals generated by the negative electrode sheet layer from penetrating the first separator to form an electrical connection with the positive electrode sheet layer to cause a short circuit.
Optionally, the hierarchical relationship of the winding core is, in order, the negative electrode sheet layer, the first metal sheet layer, the first isolation film, the positive electrode sheet layer, and the second isolation film.
Optionally, the jellyroll further comprises a second metal sheet layer located between the first separator film and the positive electrode sheet layer.
Optionally, the metal sheet is an aluminum sheet or a copper sheet.
Optionally, the positive electrode sheet is lithium cobaltate LiCoO2 and the negative electrode sheet is carbon C.
It should be noted that, for the description of the battery 20, reference may be made to the corresponding description of fig. 1 to fig. 6 in the above embodiments of the invention, and details are not repeated here.
In a possible implementation manner of the embodiment of the present invention, as shown in fig. 7b, the electronic device further includes: a charging device 72 for obtaining a charging current to charge the battery; and a charging control chip 73 for controlling the charging of the battery by the charging device.
Specifically, the charging control chip 73 is configured to: receiving a suspension instruction generated by the protection circuit board of the battery when the target voltage value is determined to meet the voltage threshold value, and executing the suspension instruction to enable the charging device 72 to stop charging the battery.
For example, when the protection circuit board of the battery 20 determines that the target voltage value between the first metal sheet layer and the negative electrode sheet layer is 0V, it indicates that the potential of the negative electrode sheet layer is also 0V at this time, in this case, the continuous charging will cause crystallization of the negative electrode sheet layer, and therefore, the charging control chip 73 may receive a suspension instruction sent by the protection circuit board, and execute the suspension instruction to control the charging device 72 to stop charging the battery 20, so as to prevent the negative electrode sheet layer from being crystallized, further prevent a separation film from being punctured by the crystallization to cause short circuit, and improve the safety of the electronic device.
It should be noted that the electronic device 70 may be a terminal device such as a mobile phone, a tablet Computer, a notebook Computer, an UMPC (Ultra-mobile Personal Computer), a netbook, a PDA (Personal Digital Assistant), etc., and the following description will be given by taking the mobile phone as an example, and fig. 8 is a block diagram illustrating a partial structure of the mobile phone 80 according to each embodiment of the present invention.
As shown in fig. 8, the cellular phone 80 includes: a battery 20, a charging device 801, a charging control chip 802, an RF (radio frequency) circuit 803, a memory 804, an input unit 805, a display unit 806, a processor 807, an audio circuit 808, and the like. Those skilled in the art will appreciate that the handset configuration shown in fig. 8 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The processor 807 may be a Central Processing Unit (CPU). The charging control chip 802 may be an FPGA (Field Programmable Gate Array) to control the charging of the battery. The charging device 801 is a device connected to an external charging adapter, and is used for obtaining current to charge the battery 20. The first metal sheet layer in the battery 20 can prevent the electric connection between the negative electrode sheet layer and the positive electrode sheet layer from causing a short circuit due to the penetration of crystals on the negative electrode sheet layer, and also can generate a target voltage value used for reflecting the potential of the negative electrode sheet layer together with the negative electrode sheet layer, so that after the protection circuit board of the battery 20 acquires the target voltage value in the charging process of the charging device 501 for the battery 20, if the target voltage value is 0V, a stop instruction can be sent to the charging control chip 802, and the charging control chip 802 executes the stop instruction to control the charging device 801 to stop charging the battery 20, thereby preventing the negative electrode sheet layer of the battery 20 from generating crystals, further preventing the crystals from penetrating the barrier film to cause the damage of the battery, and improving the safety of the mobile phone 80.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A battery, the battery comprising:
the battery cell consists of a roll core and a sealing film;
the winding core is formed by curling a negative electrode sheet layer, a third isolating film, a first metal sheet layer, a first isolating film, a fourth isolating film, a positive electrode sheet layer and a second isolating film together according to the circumference; the sealing film wraps the roll core; the hierarchical relationship of the winding core is that the negative electrode sheet layer, the third isolating film, the first metal sheet layer, the first isolating film, the fourth isolating film, the positive electrode sheet layer and the second isolating film are sequentially arranged;
the first metal sheet layer is positioned between the negative electrode sheet layer and the first isolating film, and the first metal sheet layer prevents crystals on the negative electrode sheet layer from penetrating the first isolating film, so that even if crystals are generated in the charging process of the negative electrode sheet layer, the crystals cannot penetrate the first metal sheet layer, and further the electric connection between the negative electrode sheet layer and the positive electrode sheet layer cannot be caused;
the roll core further comprises a second metal sheet layer located between the first isolation film and the fourth isolation film.
2. The battery of claim 1, further comprising a protection circuit board;
the first metal sheet layer and the negative electrode sheet layer are used for generating a target voltage value;
the protection circuit board is connected with the first metal sheet layer and the negative electrode sheet layer; for obtaining the target voltage value, wherein the target voltage value is indicative of the potential of the negative electrode slice.
3. The battery of claim 2, wherein the protection circuit board is configured to generate a suspend instruction upon determining that the target voltage value satisfies a voltage threshold, the suspend instruction being configured to instruct a charging control chip of an electronic device having the battery to stop charging the battery.
4. The battery according to any one of claims 1 to 3, wherein the metal sheet is an aluminum sheet or a copper sheet.
5. The cell of any one of claims 1 to 3, wherein the positive electrode sheet layer is lithium cobaltate LiCoO2(ii) a The negative electrode sheet layer is carbon C.
6. An electronic device, the electronic device comprising:
a housing;
a battery located within the housing, the battery being as in claim 2 or 3.
7. The electronic device of claim 6, further comprising:
the charging device is used for acquiring charging current to charge the battery;
and the charging control chip is used for controlling the charging device to charge the battery.
8. The electronic device of claim 7, wherein the charging control chip is specifically configured to: and receiving a stopping instruction generated when the protection circuit board of the battery determines that the target voltage value meets a voltage threshold value, and executing the stopping instruction to enable the charging device to stop charging the battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610510004.3A CN106099220B (en) | 2016-06-30 | 2016-06-30 | Battery and electronic equipment |
| US15/479,361 US10243243B2 (en) | 2016-06-30 | 2017-04-05 | Battery and charging method |
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| CN201610510004.3A CN106099220B (en) | 2016-06-30 | 2016-06-30 | Battery and electronic equipment |
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| EP0807826A2 (en) * | 1996-05-14 | 1997-11-19 | Intra Development A/S | Pilot cell for a battery |
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