CN116454422A

CN116454422A - Battery, battery assembly and electronic equipment

Info

Publication number: CN116454422A
Application number: CN202310376963.0A
Authority: CN
Inventors: 刘青和
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-18

Abstract

The application discloses a battery, a battery assembly and electronic equipment, and relates to the technical field of electronics. The battery provided by the application comprises: the first impedance control module is electrically connected with the first impedance adjusting module; the first impedance control module controls the impedance of the first impedance adjustment module to be continuously adjustable.

Description

Battery, battery assembly and electronic equipment

Technical Field

The application belongs to the technical field of electronics, and particularly relates to a battery, a battery assembly and electronic equipment.

Background

In electronic devices (such as mobile phones, tablet computers, etc.), it is important to supply power to the electronic devices by using a rechargeable battery and keep the voltage of the battery cell stable.

In the related art, the rechargeable battery can be recycled for many times, however, the internal resistance of the battery core can be gradually changed under the influence of factors such as the capacity, the electric quantity and the service life of the battery, so that the voltage of the battery core is inconsistent with the rated voltage, and the problem of poor stability of the voltage output by the battery exists.

Disclosure of Invention

The embodiment of the application provides a battery, a battery assembly and electronic equipment, which ensure stable output of cell voltage of the battery and solve the problem of poor stability of the voltage output by the battery.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, embodiments of the present application provide a battery, including: the device comprises a first electric core, a first impedance adjusting module and a first impedance control module, wherein the first impedance adjusting module is electrically connected with the first electric core, and the first impedance control module is electrically connected with the first impedance adjusting module;

the first impedance control module controls the impedance of the first impedance adjustment module to be continuously adjustable.

In a second aspect, an embodiment of the present application proposes a battery assembly, including a first electrical core, a second electrical core, a first impedance adjustment module, and an impedance control module;

the first battery cell is connected with the second battery cell in parallel; the first impedance adjusting module is electrically connected with the first electric core, and the impedance control module is electrically connected with the first impedance adjusting module;

and under the condition that the voltage difference between the voltage of the first battery cell and the voltage of the second battery cell is larger than a first preset threshold value, the impedance control module controls the impedance of the first impedance adjusting module to be continuously adjustable, so that the difference between the voltage of the first battery cell and the voltage of the second battery cell is reduced.

In a third aspect, an embodiment of the present application proposes an electronic device, including a battery according to the first aspect or a battery assembly according to the second aspect.

In an embodiment of the present application, a battery includes: the device comprises a first electric core, a first impedance adjusting module and a first impedance control module, wherein the first impedance adjusting module is electrically connected with the first electric core, and the first impedance control module is electrically connected with the first impedance adjusting module; the first impedance control module controls the impedance of the first impedance adjustment module to be continuously adjustable. In this way, in the scene that the internal resistance of the battery core is gradually changed under the influence of factors such as battery capacity, electric quantity and service life, the impedance of the first impedance adjusting module of the battery is controlled by the first impedance control module of the battery to be continuously adjustable, so that the influence of the change of the internal resistance of the battery core on the battery core voltage of the battery is counteracted, the stable output of the battery voltage is ensured, and the problem of poor stability of the voltage output by the battery is solved.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic structural view of a battery provided in an embodiment of the present application;

Fig. 2 is a schematic structural view of another battery provided in an embodiment of the present application;

fig. 3 is a schematic view of an internal structure of a current battery according to an embodiment of the present application;

fig. 4 is a schematic view of the internal structure of a battery according to an embodiment of the present application;

fig. 5 is a schematic view illustrating an internal structure of another battery according to an embodiment of the present application;

fig. 6 is a schematic diagram of an operating state of a transistor according to an embodiment of the present application;

fig. 7 is a schematic view of the internal structure of another battery provided in an embodiment of the present application;

fig. 8 is a schematic diagram of an operating state of a triode according to an embodiment of the present disclosure;

fig. 9 is a schematic view of the internal structure of another battery provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of a battery pack of an electronic device according to the related art in a dual battery charging architecture;

fig. 11 is a schematic structural view of a battery pack provided in an embodiment of the present application;

fig. 12 is a schematic structural view of another battery pack provided in an embodiment of the present application;

fig. 13 is a schematic structural view of another battery pack provided in an embodiment of the present application;

FIG. 14 is a schematic view of the battery assembly of FIG. 3 in a charging mode provided in an embodiment of the present application;

Fig. 15 is a schematic structural view of another battery pack provided in an embodiment of the present application;

fig. 16 is a schematic view of the battery assembly of fig. 15 in a charging mode provided in an embodiment of the present application;

fig. 17 is a schematic structural view of another battery pack provided in an embodiment of the present application;

fig. 18 is a schematic structural view of another battery pack provided in an embodiment of the present application;

fig. 19 is a schematic structural view of another battery pack provided in an embodiment of the present application;

FIG. 20 is a schematic block diagram of an electronic device provided in an embodiment of the present application;

FIG. 21 is a schematic block diagram of another electronic device provided in an embodiment of the present application;

fig. 22 is a schematic flowchart of a control method of a battery pack according to an embodiment of the present application.

Reference numerals illustrate:

100-cell; 200-battery assembly; 210-a first cell; 220-a second cell; 230-a first impedance adjustment module; 240-a second impedance adjustment module; 250-impedance control module; 2501-a first impedance control module; 2502-a second impedance control module; 2503-a subtraction device; 2504-inverter; 260-a first protection module; 2601-a first protection submodule; q1-a first transistor; i1-a first current source; t1-a first triode; 270-a first electricity meter module; 2701—a first fuel gauge; q2-a first target transistor; 280-a second protection module; 2801-a second protection submodule; q3-a second transistor; i2-a second current source; t2-second triode; 290-a second electricity meter module; 2901-a second fuel gauge; q4-a second target transistor; 300-electronic device.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and may be, for example, directly connected or indirectly connected through an intermediate medium, or may be communication between two members. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As described in the background art, in the related art, a rechargeable battery can be recycled for many times, however, due to the influence of factors such as battery capacity, electric quantity, service life, etc., the internal resistance of the battery cell gradually changes, resulting in inconsistent cell voltage and rated voltage of the battery, and the problem of poor stability of the voltage output by the battery exists.

Based on this, a battery provided in an embodiment of the present application includes: the first impedance control module is electrically connected with the first impedance adjusting module; the first impedance control module controls the impedance of the first impedance adjustment module to be continuously adjustable.

In this way, in the scene that the internal resistance of the battery core is gradually changed under the influence of factors such as battery capacity, electric quantity and service life, the impedance of the first impedance adjusting module of the battery is controlled by the first impedance control module of the battery to be continuously adjustable, so that the influence of the change of the internal resistance of the battery core on the battery core voltage of the battery is counteracted, the stable output of the battery voltage is ensured, and the problem of poor stability of the voltage output by the battery is solved.

The battery provided by the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

Fig. 1 is a schematic view of a battery according to an embodiment of the present application.

As shown in fig. 1, a battery 100 provided in an embodiment of the present application may include:

the first impedance adjusting module 230 is electrically connected with the first battery cell 210, and the first impedance controlling module 2501 is electrically connected with the first impedance adjusting module 230, and the first impedance adjusting module 230;

the first impedance control module 2501 controls the impedance of the first impedance adjustment module 230 to be continuously adjustable.

In this embodiment, in the case where the first impedance adjustment module 230 is connected to the first battery cell 210, the impedance value of the first impedance adjustment module 230 may be understood as a path impedance value from the first battery cell 210 to the output end of the battery 100, and the voltage/current of the first battery cell 210 may be adjusted by adjusting the impedance value of the first impedance adjustment module 230 by the first impedance control module 2501.

The voltage of the first battery cell 210 may be a charging voltage or a discharging voltage of the first battery cell 210, and the current of the first battery cell 210 may be a charging current or a discharging current of the first battery cell 210, which is not specifically limited in this application.

It can be understood that in the scenario that the internal resistance of the first electric core of the battery is gradually changed under the influence of factors such as the capacity, the electric quantity and the service life of the battery, the voltage of the first electric core can be continuously adjusted because the first impedance control module of the battery realizes the continuous adjustment of the impedance value of the first impedance adjustment module of the battery.

In the embodiment of the application, under the condition that the difference between the output voltage of the first battery cell and the rated voltage of the first battery cell is larger, the impedance value of the first impedance adjusting module is continuously adjusted to offset the difference between the output voltage of the first battery cell and the rated voltage of the first battery cell, offset the influence of the change of the internal resistance of the battery cell on the battery cell voltage of the battery, and ensure the stable output of the battery voltage.

The battery provided by the embodiment of the application comprises a first battery cell, a first impedance adjusting module and a first impedance control module, wherein the first impedance adjusting module is electrically connected with the first battery cell, and the first impedance control module is electrically connected with the first impedance adjusting module; the first impedance control module controls the impedance of the first impedance adjustment module to be continuously adjustable. In this way, in the scene that the internal resistance of the battery core is gradually changed under the influence of factors such as battery capacity, electric quantity and service life, the impedance of the first impedance adjusting module of the battery is controlled by the first impedance control module of the battery to be continuously adjustable, so that the influence of the change of the internal resistance of the battery core on the battery core voltage of the battery is counteracted, the stable output of the battery voltage is ensured, and the problem of poor stability of the voltage output by the battery is solved.

In practical application, in order to improve the capacity of the battery, the battery can be composed of a plurality of electric cores connected in parallel, and in order to ensure safe operation of the battery, the voltages of different electric cores need to be kept balanced during charging and discharging, so that the problems of current mutual filling and the like caused by inconsistent voltages of different electric cores are avoided.

In a specific embodiment, in a scenario that the battery includes a plurality of battery cells connected in parallel, in order to ensure safe operation of the battery, the battery 100 provided in the embodiment of the present application may further include: the second electric core 220, the second electric core 220 is powered in parallel with the first electric core 210;

in the case that the voltage difference between the voltage of the first cell 210 and the voltage of the second cell 220 is greater than the threshold value, the first impedance control module 2501 adjusts the impedance of the first impedance adjustment module 230 so that the difference between the voltage of the first cell 210 and the voltage of the second cell 220 is reduced.

In the embodiment of the present application, the battery 100 includes the first electric core 210 and the second electric core 22 connected in parallel, and the voltage system of the first electric core is the same as the voltage system of the second electric core (i.e. the voltage ratio of the first electric core to the second electric core is 1:1 when the battery is in an ideal state); the capacity of the first battery cell may be the same as or different from the capacity of the second battery cell. For example, the ratio of the capacity of the first cell to the capacity of the second cell is 1: n, in order to ensure safe operation of the first and second cells connected in parallel, the voltage ratio of the voltage of the first cell to the voltage of the second cell is maintained to be 1:1, and keeping the ratio of the current of the first battery cell to the current of the second battery cell to be 1: n, n is a positive number.

In this embodiment, in the case where the first impedance adjustment module 230 is connected to the first electrical core 210, the impedance value of the first impedance adjustment module 230 may be understood as a path impedance value from the first electrical core 210 to the output end of the battery, and the voltage/current of the first electrical core 210 may be continuously adjustable by continuously adjusting the impedance value of the first impedance adjustment module 230 by the first impedance control module 2501.

Thus, in the embodiment of the present application, when the voltage difference between the voltage of the first electric core 210 and the voltage of the second electric core 220 of the battery 100 is greater than the critical value, the impedance value of the first impedance adjusting module is adjusted to offset the difference between the voltage of the first electric core and the voltage of the second electric core to a certain extent, so as to ensure that the voltage of the first electric core and the voltage of the second electric core in the battery are balanced, and avoid the problems of current mutual filling and the like caused by inconsistent voltages of different electric cores in the battery.

In addition, for the battery shown in fig. 1 or fig. 2, the embodiment of the application can transform the original functional module inside the current battery into the first impedance control module and the first impedance adjustment module, and achieve the effect of stabilizing the voltage of the battery by multiplexing the original functional module inside the battery. Therefore, the first impedance control module and the first impedance adjustment module of the battery can realize other functions such as protection, electric quantity statistics and the like on the premise of realizing continuous and adjustable voltage/current of the first battery core so as to ensure stable output of the battery voltage, so that the utilization rate of the internal space of the battery is improved. The following is an example.

Fig. 3 is a schematic diagram of an internal structure of a current battery according to an embodiment of the present application.

As shown in fig. 3, the current battery includes a cell module, a protection module, an electricity meter module, and an output terminal inside.

The battery cells in the battery cell module are used for charging and discharging.

The protection module is used for protecting the battery core, and comprises an abnormal detection module and a plurality of protection sub-modules, when overcurrent, over-temperature, overcharge, over-discharge or other problems occur to the battery, the abnormal detection module can control the corresponding protection sub-modules to cut off the output of the battery so as to ensure the safety of the battery, and the number of the protection sub-modules is generally more than one, and different protection sub-modules are used for coping with different abnormal scenes.

The electricity meter module is used for measuring the electric quantity of the battery, and comprises an electricity meter, a sampling resistor Rs and a transistor Q, wherein the electricity meter is used for measuring the electric quantity of the battery by collecting current at two ends of the sampling resistor (Rs) and collecting voltage of a battery core through a Pack end; when the battery works, the transistor Q is conducted; when the battery stops working, the transistor Q is cut off to cut off the output of the battery, so that the electric quantity of the battery is prevented from leaking.

The output terminal comprises a positive electrode P+ of the battery, a negative electrode P-of the battery and a communication and control end of the battery.

In the embodiment of the present application, the protection module inside the current battery shown in fig. 3 may be modified to the first impedance control module and the first impedance adjustment module, or the electricity meter module inside the current battery shown in fig. 3 may also be modified to the first impedance control module and the first impedance adjustment module. The following is an example.

In a specific embodiment, as shown in fig. 4, the battery 100 provided in the embodiment of the present application may further include a first protection module 260, and the first protection module 260 may include a plurality of first protection sub-modules 2601 connected in series; the first impedance adjusting module 230 is connected in series with the first protection sub-module 2601.

For example, in a specific example, as shown in fig. 5, in the battery 100 provided in the embodiment of the present application, the first impedance adjusting module 230 may include a first transistor Q1. Alternatively, as shown in fig. 7, in another specific example, the first impedance adjusting module 230 may include a first current source I1 and a first transistor T1 connected to the first current source.

In the embodiment of the present application, as shown in fig. 5, in the case that the first impedance adjusting module 230 includes the first transistor Q1, the working principle of the first impedance adjusting module 230 is:

Under the condition that the battery is operating normally, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to change the impedance of the first transistor, thereby adjusting the impedance of the first impedance adjusting module 230;

when the battery is abnormal, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to turn off the first transistor Q1, and the battery stops supplying power.

It can be understood that, in practical applications, in the current battery shown in fig. 3, the first transistor Q1 may be used as a protection submodule, where the first transistor Q1 has only two states: (1) the battery is normal, the protection submodule is conducted, and the first transistor Q1 can be equivalent to a resistor of 0 omega; (2) the battery is abnormal, the protection submodule is turned off, and the first transistor Q1 can be equivalent to a resistor with infinite resistance.

In the embodiment of the present application, as can be seen from comparing fig. 3 and fig. 4 (or comparing fig. 3 and fig. 5), the first transistor Q1 is connected in series with the first protection submodule 2601, the first transistor Q1 can be used as the first impedance adjustment module 230, and fig. 6 is a schematic diagram of the working state of the transistor for the first transistor Q1, as shown in fig. 6, when the voltage difference between the gate and the source of the transistor Q1 (U _GS ) Higher, the impedance R of the transistor _DS Very small, approximately conductive, can be equivalently a 0Ω resistance. By adjusting U _GS The voltage of the transistor is changed by making the working point move up and down in the variable resistance region _DS . Specifically, the transistor is operated in the variable resistance region by turning U high _GS To increase the impedance R _DS By lowering U _GS To reduce the impedance R _DS . The transistor operating in pinch-off region, DS is turned off, impedance R _DS Can be equivalently a resistance with infinite resistance.

Thus, embodiments of the present application may adjust the voltage difference between the gate and the source of the first transistor Q1 (i.e., U) through the first impedance control module 2501 _GS ) The working state of the first transistor Q1 is controlled, and the variable resistance region of the first transistor Q1 is utilized to achieve the impedance adjusting effect.

Furthermore, under the condition that the battery is operating normally, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to change the impedance of the first transistor, so as to adjust the impedance of the first impedance adjusting module 230, thereby realizing the effect of continuously adjusting the impedance of the first impedance adjusting module 230.

In the case of abnormal battery, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to disconnect the first transistor Q1, and the battery stops supplying power, and at this time, the first transistor Q1 can also realize a battery protection function.

In addition, in the embodiment of the present application, as shown in fig. 7, in the case that the first impedance adjusting module 230 includes the first current source I1 and the first transistor T1 connected to the first current source, the working principle of the first impedance adjusting module 230 may be:

under the condition that the battery works normally, the base current of the first triode T1 is regulated by the first current source I1 to change the impedance of the first triode T1, so that the impedance of the first impedance regulating module 230 is regulated;

under the condition of abnormal battery, the base current of the first triode T1 is regulated by the first current source I1, so that the first triode T1 is disconnected, and the battery stops supplying power.

It can be understood that, in practical applications, in the current battery shown in fig. 3, the first transistor T1 may be used as a protection submodule, where the first transistor T1 has only two states: (1) the battery is normal, the protection submodule is conducted, and the first triode T1 can be equivalent to a resistor of 0 omega; (2) the battery is abnormal, the protection submodule is turned off, and the first triode T1 can be equivalent to a resistor with infinite resistance.

In the embodiment of the present application, as can be seen by comparing fig. 3 and fig. 4 (or comparing fig. 3 and fig. 7), the first transistor T1 is connected in series with the first protection submodule 2601 In the connection, the first triode T1 can be used as the first impedance adjusting module 230, and for the first triode T1, fig. 8 is a schematic diagram of the working state of the triode, as shown in fig. 8, when the base current ib=0 of the triode, the triode works in the cut-off region, the triode is cut off, and the impedance R _CE Equivalent to an infinite resistance. When the base current Ib of the triode is large and U _CE When the triode is very small, the triode works in an amplifying region and is equivalent to short circuit, and the impedance R _CE The equivalent is 0. When the triode is in the saturation region, the base current Ib can be adjusted to adjust Ic to adjust the impedance R of the triode _CE The impedance adjusting effect is achieved. In this way, the embodiment of the application can adjust the base current Ib of the first triode T1 through the first current source I1 to control the working state of the first triode T1, and achieve the impedance adjusting effect by using the saturation region of the first triode T1.

In this way, the current of the first current source I1 can be adjusted by the first impedance control module 2501, so as to adjust the base current Ib of the first triode T1, control the working state of the first triode T1, and achieve the impedance adjustment effect by using the saturation region of the first triode T1.

Furthermore, under the condition that the battery is working normally, the base current Ib of the first triode T1 is adjusted to change the impedance of the first triode T1, so as to adjust the impedance of the first impedance adjusting module 230, and achieve the effect of continuously adjusting the impedance of the first impedance adjusting module 230.

Under the condition of abnormal battery, the base current of the first triode T1 is adjusted to disconnect the first triode T1, the battery stops supplying power, and the first triode T1 can realize the battery protection function.

In another specific embodiment, the present embodiment may retrofit the current battery internal fuel gauge module shown in fig. 3 into a first impedance control module and a first impedance adjustment module. For example, as shown in fig. 9, the battery 100 provided in the embodiment of the present application may further include a first fuel gauge module 270, and the first fuel gauge module 270 includes a first fuel gauge 2701 and a first target transistor Q2 connected to the first fuel gauge 2701.

Wherein the first impedance control module 2501 may comprise a first fuel gauge 2701 and the first impedance adjustment module 230 may comprise a first target transistor Q2.

In the case where the first impedance adjusting module 230 includes the first target transistor Q2, as shown in fig. 9, the operating principle of the first impedance adjusting module 230 may be:

under the condition that the battery is operating normally, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to change the impedance of the first target transistor Q2, thereby adjusting the impedance of the first impedance adjusting module 230;

When the battery stops operating, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to turn off the first target transistor Q2, and the battery stops supplying power.

The operation state of the first target transistor Q2 may refer to the content of the operation state of the transistor shown in fig. 6, which is not described herein.

In this way, the voltage difference between the gate and the source of the first target transistor Q2 can be adjusted by the first impedance control module 2501, so as to control the working state of the first target transistor Q2, and the variable resistance region of the first target transistor Q2 is utilized to achieve the impedance adjustment effect.

Furthermore, under the condition that the battery is operating normally, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to change the impedance of the first target transistor Q2, so as to adjust the impedance of the first impedance adjusting module 230, thereby realizing the effect of continuously adjusting the impedance of the first impedance adjusting module 230.

Under the condition that the battery stops working, the voltage difference between the grid electrode and the source electrode of the first target transistor Q2 is adjusted, so that the first target transistor Q2 is disconnected to cut off the output of the battery, and the electric quantity of the battery is prevented from leaking.

It should be noted that, based on a similar concept as the battery provided in the above embodiments, the embodiments of the present application also provide a battery assembly, which is described in detail below.

In practical applications, in order to flexibly utilize the internal space of the electronic device, the battery portion of the electronic device may be a battery assembly composed of a plurality of batteries having different sizes. In order to ensure the safe operation of the battery assembly, the voltages of the large and small battery cells need to be kept balanced during charging and discharging, and the problems of current mutual filling and the like caused by inconsistent voltages of the large and small battery cells are avoided.

In the related art, for example, a battery assembly of an electronic device includes two batteries with different sizes, as shown in fig. 10, C1 and C2 are batteries with the same two voltage systems and different capacities. A is the output end of the charging IC, and the charging current flows from the end A to the battery C1 and the battery C2 to charge the battery assembly. R1 is the internal resistance of the battery C1, R2 is the internal resistance of the battery C2, and the values of R1 and R2 are affected by the capacity, the electric quantity, the service life and other factors of the battery and can be changed gradually. R3 is the path impedance of charging IC output a to battery C1. R4 is the path impedance of charging IC output a to battery C2. As can be seen from ohm's law, the current flowing into cell C1 is related to the point a voltage, C1 voltage, R1, R3. The current flowing into the battery C2 is related to the point a voltage, the C2 voltage, R2, R4. Assuming that the voltages of the two batteries are the same in the initial state, the ratio of currents flowing into the two batteries C1, C2 is determined by R1, R2, R3, R4. In the related art, if the voltage (or the current) of two batteries is balanced only by adjusting the impedance value of R3/R4, the layout of a printed circuit board of the electronic device is greatly limited, and the requirement on production consistency is high; if a new module is introduced into the electronic device to equalize the voltages of the two batteries (or to equalize the currents of the two batteries), the complexity and cost of the system of the electronic device tend to increase.

Based on this, the battery component with adjustable impedance provided by the embodiment of the application can ensure the voltage balance of each battery core in the battery component by adjusting the path impedance value of each battery core in the battery component, and solve the problem of inconsistent voltage of different battery cores in the battery component. For example, taking a battery assembly including a first electric core and a second electric core as an example, the embodiment of the application can adjust the path impedance value of the first electric core and/or the path impedance value of the second electric core inside the battery assembly, so as to ensure the voltage balance of the first electric core and the second electric core in the battery assembly, and avoid the problem of current mutual filling caused by inconsistent voltages of different electric cores in the battery assembly.

The battery pack provided by the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

Fig. 11 is a schematic view of a battery assembly according to an embodiment of the present application.

As shown in fig. 11, a battery assembly 200 provided in an embodiment of the present application may include:

the first battery cell 210, the second battery cell 220, the first impedance adjustment module 230, and the impedance control module 250;

the first cell 210 is connected in parallel with the second cell 220; the first impedance adjustment module 230 is electrically connected to the first electric core 210, and the impedance control module 250 is electrically connected to the first impedance adjustment module 230;

In the case that the voltage difference between the voltage of the first battery cell 210 and the voltage of the second battery cell 220 is greater than the first preset threshold, the impedance control module 250 controls the impedance of the first impedance adjustment module 230 to be continuously adjustable, so that the difference between the voltage of the first battery cell 210 and the voltage of the second battery cell 220 is reduced.

In the embodiment of the present application, the battery assembly 200 includes a first battery and a second battery, which may be disposed in a centralized manner or separately in the electronic device. The first battery and/or the second battery may be a battery provided in any of the embodiments described above in the present application. The first battery may include a first battery cell 210, the second battery may include a second battery cell 220, the first battery cell 210 and the second battery cell 220 are connected in parallel, and a rated voltage of the first battery cell 210 and a rated voltage of the second battery cell 220 may be the same.

Where the battery assembly 200 includes a first cell 210 and a second cell 220 connected in parallel, the voltage system of the first cell is the same as the voltage system of the second cell (i.e., the battery ideally maintains a voltage ratio of the first cell to the second cell of 1:1); the capacity of the first battery cell may be the same as or different from the capacity of the second battery cell. For example, the ratio of the capacity of the first cell to the capacity of the second cell is 1: n, in order to ensure safe operation of the first and second cells connected in parallel, the voltage ratio of the voltage of the first cell to the voltage of the second cell is maintained to be 1:1, and keeping the ratio of the current of the first battery cell to the current of the second battery cell to be 1: n, n is a positive number.

In this embodiment, in the case where the first impedance adjustment module 230 is connected to the first electrical core 210, the impedance value of the first impedance adjustment module 230 may be understood as a path impedance value from the first electrical core 210 to the output end of the battery assembly, and the impedance value of the first impedance adjustment module 230 is continuously adjusted by the impedance control module 250, so that the voltage/current of the first electrical core 210 may be continuously adjusted.

Thus, in the embodiment of the present application, when the voltage difference between the voltage of the first electric core 210 and the voltage of the second electric core 220 of the battery assembly 200 is greater than the first preset threshold, by adjusting the impedance value of the first impedance adjusting module, the difference between the voltage of the first electric core and the voltage of the second electric core is offset to a certain extent, so as to ensure that the voltage of the first electric core and the voltage of the second electric core in the battery are balanced, and avoid the problems of current mutual filling and the like caused by inconsistent voltages of different electric cores in the battery assembly.

In a specific embodiment, in addition to the continuous voltage/current adjustment of the first cell 210, the embodiments of the present application may also realize the continuous voltage/current adjustment of the second cell 220. For example, as shown in fig. 12, the battery assembly 200 provided in the embodiment of the present application may further include a second impedance adjustment module 240; the second impedance adjusting module 240 is connected with the second electric core 220; the impedance control module 250 is connected with the second impedance adjustment module 240;

The impedance control module 250 is configured to adjust the impedance value of the first impedance adjustment module 230 and/or the impedance value of the second impedance adjustment module 240 when the voltage difference between the first voltage of the first battery cell 210 and the second voltage of the second battery cell 220 is greater than a first preset threshold, so that the voltage difference between the first adjusted voltage of the first battery cell 210 and the second adjusted voltage of the second battery cell 220 is less than a second preset threshold;

the first adjustment voltage is a voltage of the first battery cell 210 obtained after the impedance value of the first impedance adjustment module 230 is adjusted; the second adjustment voltage is the voltage of the second battery cell 220 obtained after the impedance value of the second impedance adjustment module 240 is adjusted;

wherein the second preset threshold is less than or equal to the first preset threshold.

In this embodiment, in the case where the second impedance adjustment module 240 is connected to the second battery cell 220, the impedance value of the second impedance adjustment module 240 may be understood as a path impedance value from the second battery cell 220 to the output end of the battery assembly 200, and the voltage/current of the second battery cell 220 may be adjusted by adjusting the impedance value of the second impedance adjustment module 240 through the impedance control module 250.

The voltage of the first battery cell 210 may be a charging voltage or a discharging voltage of the first battery cell 210, and the current of the first battery cell 210 may be a charging current or a discharging current of the first battery cell 210; the voltage of the second battery cell 220 may be a charging voltage or a discharging voltage of the second battery cell 220, and the current of the second battery cell 220 may be a charging current or a discharging current of the second battery cell 220, which is not specifically limited in this application.

It can be understood that in the case that the battery assembly is composed of a plurality of parallel-connected electric cells, the impedance value of the first impedance adjusting module of the battery assembly and/or the impedance value of the second impedance adjusting module of the battery assembly can be adjusted by the impedance control module of the battery assembly, so that the voltage of the first electric cell and/or the voltage of the second electric cell can be adjusted.

In this embodiment of the present application, the second preset threshold is greater than or equal to 0, and the second preset threshold is less than or equal to the first preset threshold, where the specific threshold may be set according to actual requirements, and this application is not limited specifically.

In the embodiment of the application, under the condition that the difference between the voltage of the first battery cell and the voltage of the second battery cell is larger, the difference between the voltage of the first battery cell and the voltage of the second battery cell is counteracted by adjusting the impedance value of the first impedance adjusting module and/or the impedance value of the second impedance adjusting module, so that the voltage of the first battery cell and the voltage of the second battery cell in the battery assembly are balanced, and the problems of current filling and the like caused by inconsistent voltages of different battery cells in the battery assembly are solved.

According to the battery assembly provided by the embodiment of the application, the battery assembly comprises a first battery cell, a second battery cell, a first impedance adjusting module, a second impedance adjusting module and an impedance control module; the first battery cell is connected with the second battery cell in parallel; the first impedance adjusting module is connected with the first electric core, and the second impedance adjusting module is connected with the second electric core; the impedance control module is respectively connected with the first impedance adjustment module and the second impedance adjustment module; the impedance control module is used for adjusting the impedance value of the first impedance adjustment module and/or the impedance value of the second impedance adjustment module when the voltage difference between the first voltage of the first battery cell and the second voltage of the second battery cell is larger than a first preset threshold value, so that the voltage difference between the first adjustment voltage of the first battery cell and the second adjustment voltage of the second battery cell is smaller than a second preset threshold value; the first adjusting voltage is the voltage of the first battery cell obtained after the impedance value of the first impedance adjusting module is adjusted; the second adjusting voltage is the voltage of the second battery cell obtained after the impedance value of the second impedance adjusting module is adjusted; wherein the second preset threshold is less than or equal to the first preset threshold. Therefore, under the condition that the difference between the voltage of the first battery cell and the voltage of the second battery cell is large, the difference between the voltage of the first battery cell and the voltage of the second battery cell is counteracted by adjusting the impedance value of the first impedance adjusting module and/or the impedance value of the second impedance adjusting module, so that the voltage balance of the first battery cell and the voltage balance of the second battery cell in the battery assembly are ensured, and the problems that currents mutually irrigate and the like due to inconsistent voltages of different battery cells in the battery assembly are solved.

In a specific embodiment, the first adjustment voltage may be equal to the second adjustment voltage, in other words, by adjusting the impedance value of the first impedance adjustment module and/or the impedance value of the second impedance adjustment module, the difference between the voltage of the first battery cell and the voltage of the second battery cell is all offset, so that the voltage of the first battery cell and the voltage of the second battery cell in the battery assembly are ensured to be equal, the voltage of the first battery cell and the voltage of the second battery cell can be balanced to the greatest extent, and the problems of current mutual filling and the like caused by inconsistent voltages of different battery cells in the battery assembly are solved.

Of course, in other embodiments, the first adjustment voltage may be slightly larger or slightly smaller than the second adjustment voltage, which is not particularly limited in this application.

It can be appreciated that in practical applications, the first and second cells in the battery assembly 200 are typically packaged separately and laid out separately. For example, the first battery cell and the first impedance adjusting module are packaged into a first battery, the second battery cell and the second impedance adjusting module are packaged into a second battery, the first battery cell and the second battery cell are distributed at different positions of a circuit board of the electronic equipment, and the first battery cell and the second battery cell are connected in parallel to realize parallel power supply of the first battery cell and the second battery cell. In practical application, the impedance control module may control the first impedance adjustment module and the first impedance adjustment module respectively, or the impedance control module may also control the first impedance adjustment module and the first impedance adjustment module simultaneously.

In a specific embodiment, the impedance control module may control the first impedance adjustment module and the first impedance adjustment module, respectively. As shown in fig. 13, in the battery assembly 200 provided in the embodiment of the present application, the impedance control module 250 includes a first impedance control module 2501 and a second impedance control module 2502; the first impedance control module 2501 is connected to the first impedance adjustment module 230, and the second impedance control module 2502 is connected to the second impedance adjustment module 240;

wherein, the first impedance control module 2501 is configured to adjust an impedance value of the first impedance adjustment module 230;

the second impedance control module 2502 is configured to adjust an impedance value of the second impedance adjustment module 240.

Since the first impedance control module 2501 adjusts the impedance value of the first impedance adjustment module 230; the second impedance control module 2502 adjusts the impedance value of the second impedance adjustment module 240; the adjustment amplitude of the first impedance adjustment module 230 and the adjustment amplitude of the second impedance adjustment module 240 may be respectively controlled and adjusted, the adjustment amplitude of the first impedance adjustment module 230 and the adjustment amplitude of the second impedance adjustment module 240 may be the same or different, and further, the adjustment amplitude of the first voltage of the first battery cell may be the same or different from the adjustment amplitude of the second voltage of the second battery cell, and the adjustment mode is flexible.

In a specific charging scenario, taking the battery assembly shown in fig. 13 as an example, as shown in fig. 14, the battery assembly includes a first battery and a second battery, and the first battery includes a first electric core, a first impedance adjustment module and a first impedance control module; the second battery comprises a second battery core, a second impedance adjusting module and a second impedance control module; the first battery cell and the second battery cell are connected in parallel, and the current of the output end (A) of the charging IC flows into the first battery cell through the first impedance adjusting module to charge the first battery, and the current of the output end (A) of the charging IC flows into the second battery cell through the second impedance adjusting module to charge the second battery. When the difference between the charging voltage of the first battery cell and the charging voltage of the second battery cell is greater than a first preset threshold, the first impedance control module receives a first control signal from the charging IC through the control & communication terminal of the first battery cell, and adjusts the impedance value of the first impedance adjustment module 230 based on the first control signal; the second impedance control module receives a second control signal from the charging IC through the control & communication terminal of the second battery, and adjusts the impedance value of the second impedance adjustment module 240 based on the second control signal, and the adjustment amplitude of the first impedance adjustment module and the adjustment amplitude of the second impedance adjustment module may be different, and the adjustment mode is flexible.

In addition, for the battery assembly shown in fig. 14, according to the embodiment of the application, the original functional module inside the first battery can be modified into the first impedance control module and the first impedance adjustment module, the original functional module inside the second battery can be modified into the second impedance control module and the second impedance adjustment module, and the voltage balancing effect of the parallel battery can be achieved by multiplexing the original functional module inside the battery. Therefore, the first impedance control module and the first impedance adjustment module of the first battery can also realize other functions such as protection, electric quantity statistics and the like on the premise of realizing continuous voltage/current adjustment of the first battery core so as to improve the utilization rate of the internal space of the battery. The following is an example.

Fig. 3 is a schematic diagram of the internal structure of the current battery according to the embodiment of the present application. As shown in fig. 3, the current battery includes a cell module, a protection module, an electricity meter module, and an output terminal inside. The battery cells in the battery cell module are used for charging and discharging. The protection module is used for protecting the battery core, the protection module comprises an abnormal detection module and a plurality of protection submodules, when overcurrent, over-temperature, overcharge, over-discharge or other problems occur to the battery, the abnormal detection module can control the protection submodules to cut off the output of the battery so as to ensure the safety of the battery, the number of the protection submodules is generally more than one, and different protection submodules are used for coping with different abnormal scenes. The electricity meter module is used for measuring the electricity quantity of the battery and comprises an electricity meter, a sampling resistor Rs and a MOS tube switch Q, and the electricity meter specifically collects the current at two ends of the sampling resistor Rs and the voltage of the battery core through a Pack end to measure the electricity quantity of the battery; when the battery works, the MOS tube switch Q is conducted; when the battery stops working, the MOS tube switch Q is cut off to cut off the output of the battery, so that the electric quantity of the battery is prevented from leaking. The output terminal includes the positive electrode p+ of the battery, the negative electrode P-of the battery, and the communication & control terminal of the battery.

In this embodiment of the present application, for the first battery, the protection module inside the current battery shown in fig. 3 may be modified to the first impedance control module and the first impedance adjustment module, or the fuel gauge module inside the current battery shown in fig. 3 may also be modified to the first impedance control module and the first impedance adjustment module. Similarly, for the second battery, the protection module inside the present battery shown in fig. 3 may be modified to the second impedance control module and the second impedance adjustment module, or the electricity meter module inside the present battery shown in fig. 3 may be modified to the second impedance control module and the second impedance adjustment module. The internal structure of the first battery is exemplified below.

In a specific example, taking a first battery in a battery assembly as an example, the embodiment of the present application may modify a first abnormality detection module in a first protection module of the first battery into a first impedance control module, and modify at least one first protection sub-module in the first protection module of the first battery into a first impedance adjustment module.

For example, fig. 4 may be a schematic view of an internal structure of a first battery in a battery assembly according to an embodiment of the present application. As shown in fig. 4, in the first battery of the battery assembly 200 provided in the embodiment of the present application, the first battery includes a first protection module 260, and the first protection module 260 may include a plurality of first protection sub-modules 2601 connected in series; the first impedance adjusting module 230 is connected in series with the first protection sub-module 2601.

For example, as shown in fig. 5, in the first battery provided in the embodiment of the present application, in the case where the first impedance adjusting module 230 is connected in series with the first protection sub-module 2601, the first impedance adjusting module 230 may include the first transistor Q1. Alternatively, as shown in fig. 7, in the case where the first impedance adjusting module 230 is connected in series with the first protection sub-module 2601, the first impedance adjusting module 230 may include a first current source I1 and a first transistor T1 connected to the first current source.

under the condition that the battery assembly works normally, the voltage difference between the grid electrode and the source electrode of the first transistor Q1 is adjusted to change the impedance of the first transistor, so that the impedance of the first impedance adjusting module 230 is adjusted;

when the battery pack is abnormal, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to turn off the first transistor Q1, and the battery pack stops supplying power.

In the embodiment of the present application, it can be seen from comparing fig. 3 and 4 (or comparing fig. 3 and 5), the following isA transistor Q1 is connected in series with the first protection submodule 2601, the first transistor Q1 can be used as the first impedance adjusting module 230, and fig. 6 is a schematic diagram of the operation state of the transistor for the first transistor Q1, as shown in fig. 6, when the voltage difference between the gate and the source of the transistor Q1 (U _GS ) Higher, the impedance R of the transistor _DS Very small, approximately conductive, can be equivalently a 0Ω resistance. By adjusting U _GS The voltage of the transistor is changed by making the working point move up and down in the variable resistance region _DS . Specifically, the transistor is operated in the variable resistance region by turning U high _GS To increase the impedance R _DS By lowering U _GS To reduce the impedance R _DS . The transistor operating in pinch-off region, DS is turned off, impedance R _DS Can be equivalently a resistance with infinite resistance.

Furthermore, under the condition that the battery assembly works normally, the voltage difference between the gate and the source of the first transistor Q1 is adjusted to change the impedance of the first transistor, so as to adjust the impedance of the first impedance adjusting module 230, and achieve the effect of continuously adjusting the impedance of the first impedance adjusting module 230.

Under the condition of abnormal battery components, the voltage difference between the grid electrode and the source electrode of the first transistor Q1 is adjusted, so that the first transistor Q1 is disconnected, the battery components stop supplying power, and at the moment, the first transistor Q1 can also realize a battery protection function.

under the condition that the battery assembly works normally, the base current of the first triode T1 is regulated by the first current source I1 to change the impedance of the first triode T1, so that the impedance of the first impedance regulating module 230 is regulated;

under the condition that the battery assembly is abnormal, the base current of the first triode T1 is regulated through the first current source I1, so that the first triode T1 is disconnected, and the battery assembly stops supplying power.

In the embodiment of the present application, as can be seen from comparing fig. 3 and fig. 4 (or comparing fig. 3 and fig. 7), the first transistor T1 is connected in series with the first protection submodule 2601, the first transistor T1 can be used as the first impedance adjustment module 230, and for the first transistor T1, fig. 8 is a schematic diagram of the working state of the transistor, as shown in fig. 8, when the base current ib=0 of the transistor, the transistor works in the cut-off region, the transistor is cut-off, and the impedance R _CE Equivalent to an infinite resistance. When the base current Ib of the triode is large and U _CE When the triode is very small, the triode works in an amplifying region and is equivalent to short circuit, and the impedance R _CE The equivalent is 0. When the triode is in the saturation region, the base current Ib can be adjusted to adjust Ic to adjust the impedance R of the triode _CE The impedance adjusting effect is achieved. In this way, the embodiment of the application can adjust the base current Ib of the first triode T1 through the first current source I1 to control the working state of the first triode T1, and achieve the impedance adjusting effect by using the saturation region of the first triode T1.

Furthermore, under the condition that the battery assembly works normally, the base current Ib of the first triode T1 is adjusted to change the impedance of the first triode T1, so that the impedance of the first impedance adjusting module 230 is adjusted, and the effect that the impedance of the first impedance adjusting module 230 is continuously adjustable is achieved.

And under the abnormal condition of the battery assembly, the base current of the first triode T1 is adjusted to disconnect the first triode T1, the battery assembly stops supplying power, and the first triode T1 can realize the battery protection function.

In another specific embodiment, as shown in fig. 9, the first battery provided in the embodiments of the present application may further include a first fuel gauge module 270, where the first fuel gauge module 270 includes a first fuel gauge 2701 and a first target transistor Q2 connected to the first fuel gauge 2701.

under the condition that the battery assembly is operating normally, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to change the impedance of the first target transistor Q2, thereby adjusting the impedance of the first impedance adjusting module 230;

When the battery pack stops operating, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to turn off the first target transistor Q2, and the battery pack stops supplying power.

Furthermore, under the condition that the battery assembly works normally, the voltage difference between the gate and the source of the first target transistor Q2 is adjusted to change the impedance of the first target transistor Q2, so as to adjust the impedance of the first impedance adjusting module 230, and achieve the effect of continuously adjusting the impedance of the first impedance adjusting module 230.

Under the condition that the battery assembly stops working, the voltage difference between the grid electrode and the source electrode of the first target transistor Q2 is adjusted, so that the first target transistor Q2 is disconnected to cut off the output of the battery assembly, and the electric quantity of the battery assembly is prevented from leaking.

In addition, based on the same concept as the first battery in the battery assembly mentioned in fig. 4, 5, 7 and 9, the embodiment of the application can also reform the original functional module inside the second battery into the second impedance control module and the second impedance adjustment module, and multiplex other functional modules inside the battery to achieve the voltage balancing effect of the parallel battery, so that the second impedance control module and the second impedance adjustment module of the second battery can also realize other functions such as protection, electric quantity statistics and the like on the premise of realizing continuous and adjustable voltage/current of the second battery core so as to improve the utilization rate of the internal space of the battery. And will not be described in detail herein.

In addition to the above-described control of the first impedance adjustment module and the first impedance adjustment module using the first impedance control module 2501 and the second impedance control module 2502, respectively, in the embodiment of the present application, the impedance control module 250 may also control the first impedance adjustment module and the first impedance adjustment module at the same time, which is exemplified below.

In another specific embodiment, as shown in fig. 15, in the battery assembly 200 provided in the embodiment of the present application, the impedance control module 250 may include a subtraction 2503 and an inverter 2504; the subtractor 2503 has a first input, a second input, and an output, the first input of the subtractor 2503 is connected to the first cell 210, the second input of the subtractor 2503 is connected to the second cell 220, the output of the subtractor 2503 is connected to the first impedance adjustment module 230, and the output of the subtractor 2503 is also connected to the second impedance adjustment module 240 through an inverter 2504.

The subtracting unit 2503 is configured to collect the first voltage of the first battery cell 210 and the second voltage of the second battery cell 220, and output a target control signal when a voltage difference between the first voltage of the first battery cell 210 and the second voltage of the second battery cell 220 is greater than a first preset threshold value, where the target control signal is used to adjust the impedance value of the first impedance adjusting module 230, and the target control signal adjusts the impedance value of the second impedance adjusting module 240 after passing through the inverter 2504.

In this way, the impedance value of the first impedance adjustment module 230 and the impedance value of the second impedance adjustment module 240 may be adjusted in opposite directions to cancel the voltage difference between the first voltage of the first cell 210 and the second voltage of the second cell 220.

Further, it can be understood that the reaction speed is faster by adjusting the impedance value of the first impedance adjusting module 230 and the impedance value of the second impedance adjusting module 240 by using the subtraction 2503 and the inverter 2504 as compared with the battery assembly of fig. 13 or 14. Specifically, for the battery assembly of fig. 13 or 14, when the detection module of the electronic device detects that the voltage difference between the first voltage of the first electric core 210 and the second voltage of the second electric core 220 is greater than the first preset threshold, the main control module or other control modules of the electronic device transmit control signals to the first impedance control module through the communication & control end of the battery, and the impedance value of the first impedance adjustment module 230 is adjusted by the first impedance control module, so that the reaction speed is slower. For the battery assembly of fig. 15, the hardware (i.e., the subtracting device 2503 and the inverter 2504) is directly used to adjust the impedance value of the first impedance adjusting module 230 and the impedance value of the second impedance adjusting module 240 in opposite directions when the voltages of the parallel batteries are unbalanced, so as to offset the voltage difference between the first voltage of the first battery cell 210 and the second voltage of the second battery cell 220, and the path impedance of the battery cells in the battery assembly is controlled in a hardware manner, so that the voltages of the parallel batteries are balanced, the system response speed is faster, and the stability is stronger.

Fig. 16 is a schematic view of the battery assembly shown in fig. 15 in a charging mode according to an embodiment of the present application.

As shown in fig. 16, the battery assembly includes a first battery including a first cell and a first impedance adjustment module; the second battery comprises a second electric core and a second impedance adjusting module; the first battery cell and the second battery cell are connected in parallel, and the current of the output end (A) of the charging IC flows into the first battery cell through the first impedance adjusting module to charge the first battery, and the current of the output end (A) of the charging IC flows into the second battery cell through the second impedance adjusting module to charge the second battery. The subtractor 2503 directly outputs a target control signal when detecting that the difference between the charging voltage of the first battery cell and the charging voltage of the second battery cell is greater than the first preset threshold value, where the target control signal is used to adjust the impedance value of the first impedance adjusting module 230, and the target control signal adjusts the impedance value of the second impedance adjusting module 240 after passing through the inverter 2504. In this way, when the voltages of the parallel batteries are unbalanced, the hardware (i.e., the subtraction device 2503 and the inverter 2504) is directly used to adjust the impedance value of the first impedance adjusting module 230 and the impedance value of the second impedance adjusting module 240 in opposite directions, so as to offset the voltage difference between the first voltage of the first battery cell 210 and the second voltage of the second battery cell 220, and the circuit impedance of the battery cells in the battery assembly is controlled in a hardware manner, so that the voltages of the parallel batteries are balanced, and the reaction speed is faster.

In addition, for the battery assembly shown in fig. 16, according to the embodiment of the application, other functional modules in the first battery can be modified into the first impedance adjusting module, other functional modules in the second battery can be modified into the second impedance adjusting module, and the voltage balancing effect of the parallel battery is achieved by multiplexing the other functional modules in the battery, so that the utilization rate of the internal space of the battery is improved. The following is an example.

For example, embodiments of the present application may retrofit at least one first protection sub-module in a first protection module inside a first battery to a first impedance adjustment module, or retrofit a first target transistor Q2 in a first fuel gauge module inside a first battery to a first impedance adjustment module. Similarly, the embodiment of the application may modify at least one second protection sub-module in the second protection module inside the second battery into the second impedance adjustment module, or modify the second target transistor Q4 in the second fuel gauge module inside the second battery into the first impedance adjustment module.

In a specific example, the embodiment of the present application may modify at least one first protection sub-module of the first protection modules inside the first battery of the battery assembly into the first impedance adjusting module. As shown in fig. 17 or 18, the battery assembly 200 may include a first battery, which may include a first protection module 260, the first protection module 260 including a plurality of first protection sub-modules 2601; the first impedance adjustment module 230 is connected in series with the first protection sub-module 2601;

The output of the subtractor 2503 is connected to the first impedance adjustment module 230.

Therefore, the first impedance control module and the first impedance adjustment module of the first battery can also realize other functions such as protection, electric quantity statistics and the like on the premise of realizing continuous voltage/current adjustment of the first battery core so as to improve the utilization rate of the internal space of the battery.

For example, as shown in fig. 17, the first impedance adjusting module 230 includes a first transistor Q1, and an output terminal of the subtractor 2503 is connected to the first transistor Q1.

Therefore, the first transistor Q1 is adopted as the first impedance adjusting module, and the protection function can be realized on the premise of continuously adjusting the voltage/current of the first battery core, so that the utilization rate of the internal space of the first battery is improved.

Alternatively, as shown in fig. 18, the first impedance adjusting module 230 includes a first current source I1 and a first triode T1 connected to the first current source I1, and the output terminal of the subtractor 2503 is connected to the first triode T1 through the first current source I1. Therefore, the first current source I1 and the first triode T1 connected with the first current source I1 are adopted as the first impedance adjusting module, and the protection function can be realized on the premise of continuously adjusting the voltage/current of the first battery core, so that the utilization rate of the internal space of the first battery is improved.

In another specific example, embodiments of the present application may retrofit the first target transistor Q2 in the first fuel gauge module 270 inside the first battery to a first impedance adjustment module. As shown in fig. 19, the battery assembly 200 provided by the embodiments of the present application may include a first battery, which may include a first fuel gauge module 270, the first fuel gauge module 270 including a first fuel gauge 2701 and a first target transistor Q2 connected to the first fuel gauge 2701; the first impedance adjusting module 230 includes a first target transistor Q2; the output of the subtractor 2503 is connected to a first target transistor Q2.

Therefore, the first target transistor Q2 in the first battery is used as the first impedance adjusting module, and the functions of electric quantity statistics and electric quantity leakage prevention can be realized on the premise of continuously adjusting the voltage/current of the first battery core, so that the utilization rate of the internal space of the first battery is improved.

In addition, for the battery assembly shown in fig. 16, based on the same concept as the first battery in the battery assemblies mentioned in fig. 17, 18 and 19, the embodiment of the present application may also take the second battery as an example, modify other functional modules inside the second battery into the second impedance adjusting module, and achieve the voltage balancing effect of the parallel battery by multiplexing other functional modules inside the battery, so as to improve the utilization rate of the internal space of the battery.

For example, as shown in fig. 17 or 18, the battery assembly 200 provided in the embodiment of the present application may include a second battery, and the second battery may include a second protection module 280, and the second protection module 280 includes a plurality of second protection sub-modules 2801; the second impedance adjusting module 240 is connected in series with the second protection sub-module 2801; the output of the subtractor 2503 is connected to the second impedance adjustment module 240 through an inverter 2504.

Specifically, as shown in fig. 17, the second impedance adjusting module 240 includes a second transistor Q3, and the output terminal of the subtractor 2503 is connected to the second transistor Q3 through an inverter;

alternatively, as shown in fig. 18, the second impedance adjusting module 240 includes a second current source I2 and a second triode T2 connected to the second current source I2, and the output terminal of the subtractor 2503 is connected to the second triode T2 through an inverter 2504 and the second current source I2.

Therefore, the second transistor Q3 is adopted as a second impedance adjusting module, or the second current source I2 and the second triode T2 connected with the second current source I2 are adopted as the second impedance adjusting module, so that the protection function can be realized on the premise of continuously adjusting the voltage/current of the second battery core, and the utilization rate of the internal space of the second battery is improved.

As another example, as shown in fig. 19, a battery assembly 200 provided by an embodiment of the present application may include a second battery, which may include a second fuel gauge module 290, the second fuel gauge module 290 including a second fuel gauge 2901 and a second target transistor Q4 connected to the second fuel gauge 2901; the second impedance adjusting module 240 includes a second target transistor Q4; the output terminal of the subtractor 2503 is connected to the second target transistor Q4 through an inverter 2504.

Therefore, the second target transistor Q4 in the second battery is used as the second impedance adjusting module, and the functions of electric quantity statistics and electric quantity leakage prevention can be realized on the premise of continuously adjusting the voltage/current of the second battery core, so that the utilization rate of the internal space of the second battery is improved.

In addition, the embodiment of the application also provides an electronic device based on the same concept as the battery or the battery assembly provided by the embodiment of the application. As shown in fig. 20 or 21, an electronic device 300 provided in an embodiment of the present application includes the battery 100 or the battery assembly 200 of any of the above embodiments.

When the electronic device includes a battery or battery assembly, the battery or battery assembly may be used to charge or discharge the electronic device. It can be understood that the electronic device includes the battery or the battery assembly according to the above embodiments, and the same technical effects can be achieved, and for avoiding repetition, a description thereof is omitted herein.

In addition, based on the same concept as the battery assembly provided in the embodiments of the present application, the embodiments of the present application also provide a control method of the battery assembly, which is applied to the battery assembly of any one of the embodiments described above.

As shown in fig. 22, the control method of the battery assembly provided in the embodiment of the present application may include:

step 2210: when the voltage difference between the first voltage of the first battery cell and the second voltage of the second battery cell is larger than a first preset threshold value, adjusting the impedance value of the first impedance adjusting module and/or the impedance value of the second impedance adjusting module so that the voltage difference between the first adjusting voltage of the first battery cell and the second adjusting voltage of the second battery cell is smaller than a second preset threshold value; wherein the second preset threshold is less than or equal to the first preset threshold;

in this embodiment of the present application, the first adjustment voltage is a voltage of the first electrical core obtained after the impedance value of the first impedance adjustment module is adjusted; the second adjustment voltage is the voltage of the second battery cell obtained after the impedance value of the second impedance adjustment module is adjusted.

Therefore, under the condition that the difference between the voltage of the first battery cell and the voltage of the second battery cell is large, the difference between the voltage of the first battery cell and the voltage of the second battery cell is counteracted by adjusting the impedance value of the first impedance adjusting module and/or the impedance value of the second impedance adjusting module, so that the voltage balance of the first battery cell and the voltage balance of the second battery cell in the battery assembly are ensured, and the problems that currents mutually irrigate and the like due to inconsistent voltages of different battery cells in the battery assembly are solved.

In a specific embodiment, the step 2210 adjusts the impedance value of the first impedance adjusting module when the voltage difference between the first voltage of the first battery cell and the second voltage of the second battery cell is greater than a first preset threshold, and/or the impedance value of the second impedance adjusting module may include:

increasing the impedance value of the first impedance adjustment module and/or decreasing the impedance value of the second impedance adjustment module when the result of the first voltage minus the second voltage is greater than a first preset threshold;

and increasing the impedance value of the second impedance adjusting module and/or decreasing the impedance value of the first impedance adjusting module when the result of subtracting the first voltage from the second voltage is larger than the first preset threshold.

Thus, in the embodiment of the application, when the first voltage of the first electric core is greater than the second voltage of the second electric core, the impedance value of the first impedance adjusting module can be increased, and/or the impedance value of the second impedance adjusting module can be reduced, so that the pressure difference between the two batteries can be reduced; when the second voltage of the second battery cell is greater than the first voltage of the first battery cell, the impedance value of the second impedance adjusting module can be increased, and/or the impedance value of the first impedance adjusting module can be reduced, so that the voltage difference between the two batteries is reduced, and the voltages of the two batteries are balanced.

In addition, in the case where the impedance control module of the battery assembly includes the first impedance control module and the second impedance control module, as shown in fig. 22, the control method for the battery assembly provided in the embodiment of the application may further include:

step 2220: when the first current of the first battery cell is larger than a first preset safety current, the impedance value of the first impedance adjusting module is adjusted so that the first current of the first battery cell is smaller than the first preset safety current;

step 2230: when the second current of the second battery core is larger than the second preset safety current, the impedance value of the second impedance adjusting module is adjusted, so that the second current of the second battery core is smaller than the second preset safety current.

Thus, in the embodiment of the application, when the first current of the first battery cell is greater than the first preset safety current, the impedance value of the first impedance adjusting module can be adjusted to be high, the first current of the first battery cell is reduced, and the first current of the first battery cell is smaller than the first preset safety current. And under the condition that the second current of the second battery cell is larger than the second preset safety current, the impedance value of the second impedance adjusting module can be adjusted to be high, the second current of the second battery cell is reduced, and the second current of the second battery cell is smaller than the second preset safety current.

In a specific example, in the case where the first impedance control module controls the first impedance adjustment module and the second impedance control module controls the second impedance adjustment module, taking the battery assembly in the charging scenario shown in fig. 14 as an example, the internal structure of the first battery may be the structure shown in fig. 3, 5 or 7, and the internal structure of the second battery may be a similar structure. The working process of the battery assembly is as follows:

when the battery assembly works normally, the first impedance control module controls the impedance value of the first impedance adjusting module to be 0, and the second impedance control module controls the impedance value of the second impedance adjusting module to be 0.

When a first battery in the battery assembly reaches an OVP (over voltage protection), UVP (under voltage protection), OTP (over temperature protection) and other abnormal conditions, the first impedance control module controls the impedance value of the first impedance adjusting module to be infinity, and the output of the first battery is turned off. Similarly, when the second battery in the battery assembly reaches the abnormal conditions such as OVP, UVP or OTP, the corresponding second impedance control module controls the impedance value of the second impedance adjusting module to be infinity, and the output of the second battery is turned off.

When the battery pack is charged, under the condition that the result of the first voltage of the first battery cell minus the second voltage of the second battery cell is larger than a first preset threshold value, the impedance value of the first impedance adjusting module is increased, and/or the impedance value of the second impedance adjusting module is reduced, the voltage difference between the two batteries is reduced, and the voltages of the two batteries are balanced. The first preset threshold is a safety pressure difference and can be set. Or, when the result of subtracting the first voltage of the first cell from the second voltage of the second cell is greater than the first preset threshold, increasing the impedance value of the second impedance adjusting module, and/or decreasing the impedance value of the first impedance adjusting module, reducing the voltage difference between the two batteries, and balancing the voltages of the two batteries.

When the battery assembly is charged, the impedance value of the first impedance adjusting module is adjusted under the condition that the first current of the first battery core is larger than a first preset safety current, so that the first current of the first battery core is smaller than the first preset safety current, and the first preset safety current is related to the first battery capacity and can be set by the charging IC or other control modules.

When the battery assembly is charged, the impedance value of the second impedance adjusting module is adjusted under the condition that the second current of the second battery core is larger than the second preset safety current, so that the second current of the second battery core is smaller than the second preset safety current, and the second preset safety current is related to the second battery capacity and can be set by the charging IC or other control modules.

In another specific example, in the case where the first impedance adjusting module and the second impedance adjusting module are simultaneously controlled by the subtraction & inversion device, taking the battery assembly in the charging scenario shown in fig. 16 as an example, the internal structure of the first battery may be the structure shown in fig. 17, and the internal structure of the second battery may be a similar structure. The working process of the battery assembly is as follows:

when the battery assembly works normally, the first abnormality detection module/the second abnormality detection module outputs a high level, the first impedance adjustment module is controlled to be conducted, the impedance value is 0, and the output of the subtraction device and the phase inverter is pulled up by the first abnormality detection module/the second abnormality detection module. It can be understood that, in practical application, the driving capability of the first abnormality detection module/the second abnormality detection module is greater than the driving capability of the "subtraction & phase inverter", and the abnormality detection module effectively drives Q1 and Q3, so that the impedance values of Q1 and Q3 are equivalent to 0.

When the battery assembly reaches OCP, OVP, UVP, OTP and other abnormal conditions, the first abnormal detection module/the second abnormal detection module outputs a low level, the first impedance adjustment module is controlled to be cut off, the impedance value is infinite, and the output of the subtraction device and the phase inverter is pulled down by the first abnormal detection module/the second abnormal detection module. It can be understood that in practical application, the driving capability of the first abnormality detection module/the second abnormality detection module is greater than the driving capability of the "subtraction & phase inverter", and the abnormality detection module effectively drives Q1 and Q3, so that the impedance values of Q1 and Q3 are equivalent to infinity.

When the battery assembly is charged, the first abnormality detection module/the second abnormality detection module is controlled to be in a high-resistance state, and the first abnormality detection module/the second abnormality detection module does not drive Q1 and Q3; but Q1, Q3 are driven by a subtractive & inverter. Under the condition that the result of subtracting the second voltage of the second battery cell from the first voltage of the first battery cell is larger than a first preset threshold value, the subtracting device outputs a driving signal to increase the Q1 impedance value, and the driving signal is inverted to decrease the Q3 impedance value so as to adjust the charging current and balance the voltages of the two batteries. And under the condition that the result of subtracting the first voltage of the first battery cell from the second voltage of the second battery cell is larger than a first preset threshold value, the subtracting device outputs a driving signal to reduce the Q1 impedance value, and the driving signal is inverted to improve the Q3 impedance value so as to adjust the charging current and balance the voltages of the two batteries.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, comprising: a first electrical core (210), a first impedance adjustment module (230) and a first impedance control module (2501), wherein the first impedance adjustment module (230) is electrically connected with the first electrical core (210), and the first impedance control module (2501) is electrically connected with the first impedance adjustment module (230);

The first impedance control module (2501) controls the impedance of the first impedance adjustment module (230) to be continuously adjustable.

2. The battery according to claim 1, further comprising a second cell (220), the second cell (220) being powered in parallel with the first cell (210); when the voltage difference between the voltage of the first cell (210) and the voltage of the second cell (220) is greater than a threshold value, the first impedance control module (2501) adjusts the impedance of the first impedance adjustment module (230) so that the difference between the voltage of the first cell (210) and the voltage of the second cell (220) is reduced.

3. The battery according to claim 1 or 2, further comprising a first protection module (260), the first protection module (260) comprising a plurality of first protection sub-modules (2601) connected in series; the first impedance adjustment module (230) is connected in series with the first protection sub-module (2601).

4. The battery according to claim 1 or 2, wherein the first impedance adjustment module (230) comprises a first transistor (Q1); or alternatively, the process may be performed,

the first impedance adjustment module comprises a first current source (I1) and a first triode (T1) connected with the first current source.

5. The battery according to claim 1 or 2, further comprising a first fuel gauge module (270), the first fuel gauge module (270) comprising a first fuel gauge (2701) and a first target transistor (Q2) connected to the first fuel gauge (2701);

wherein the first impedance control module (2501) comprises the first fuel gauge (2701), and the first impedance adjustment module (230) comprises the first target transistor (Q2).

6. The battery according to claim 1 or 2, wherein the first impedance adjustment module (230) comprises a first transistor (Q1);

adjusting a voltage difference between a gate and a source of the first transistor to change an impedance of the first transistor under a condition that the battery is operating normally, thereby adjusting an impedance of the first impedance adjustment module (230);

and under the condition that the battery is abnormal, adjusting the voltage difference between the grid electrode and the source electrode of the first transistor, so that the first transistor is disconnected, and the battery stops supplying power.

7. A battery assembly comprising a first cell (210), a second cell (220), a first impedance adjustment module (230), and an impedance control module (250);

The first cell (210) is connected in parallel with the second cell (220); the first impedance adjustment module (230) is electrically connected with the first electric core (210), and the impedance control module (250) is electrically connected with the first impedance adjustment module (230);

when the voltage difference between the voltage of the first battery cell (210) and the voltage of the second battery cell (220) is larger than a first preset threshold value, the impedance control module (250) controls the impedance of the first impedance adjustment module (230) to be continuously adjustable, so that the difference between the voltage of the first battery cell (210) and the voltage of the second battery cell (220) is reduced.

8. The battery assembly of claim 7, further comprising a second impedance adjustment module (240); the second impedance adjustment module (240) is connected with the second battery cell (220); the impedance control module (250) is connected with the second impedance adjustment module (240);

the impedance control module (250) is configured to adjust an impedance value of the first impedance adjustment module (230) and/or an impedance value of the second impedance adjustment module (240) when a voltage difference between a first voltage of the first battery cell (210) and a second voltage of the second battery cell (220) is greater than a first preset threshold, such that a voltage difference between the first adjusted voltage of the first battery cell (210) and the second adjusted voltage of the second battery cell (220) is less than a second preset threshold;

Wherein the first adjustment voltage is a voltage of the first battery cell (210) obtained after the impedance value of the first impedance adjustment module (230) is adjusted; the second adjustment voltage is a voltage of the second battery cell (220) obtained after the impedance value of the second impedance adjustment module (240) is adjusted;

9. The battery assembly of claim 8, wherein the impedance control module (250) comprises a first impedance control module (2501) and a second impedance control module (2502); the first impedance control module (2501) is connected with the first impedance adjustment module (230), and the second impedance control module (2502) is connected with the second impedance adjustment module (240);

wherein the first impedance control module (2501) is configured to adjust an impedance value of the first impedance adjustment module (230);

the second impedance control module (2502) is configured to adjust an impedance value of the second impedance adjustment module (240).

10. The battery assembly of claim 8, wherein the battery assembly comprises a plurality of cells,

the impedance control module (250) includes a canceller (2503) and an inverter (2504); the first input end of the subtraction device (2503) is connected with the first electric core (210), the second input end of the subtraction device (2503) is connected with the second electric core (220), the output end of the subtraction device (2503) is connected with the first impedance adjusting module (230), and the output end of the subtraction device (2503) is further connected with the second impedance adjusting module (240) through the phase inverter (2504).

11. The battery assembly of claim 10, wherein the battery assembly comprises a plurality of cells,

the battery assembly (200) further comprises a first protection module (260), the first protection module (260) comprising a plurality of first protection sub-modules (2601); the first impedance adjustment module (230) is connected in series with the first protection sub-module (2601);

wherein the first impedance adjustment module (230) comprises a first transistor (Q1), and the output end of the subtraction unit (2503) is connected with the first transistor (Q1);

alternatively, the first impedance adjusting module (230) includes a first current source (I1) and a first triode (T1) connected to the first current source (I1), and the output end of the subtracting unit (2503) is connected to the first triode (T1) through the first current source (I1).

12. The battery assembly of claim 11, further comprising a first fuel gauge module (270), the first fuel gauge module (270) comprising a first fuel gauge (2701) and a first target transistor (Q2) connected to the first fuel gauge (2701);

-the first impedance adjustment module (230) comprises the first target transistor (Q2); the output of the subtraction device (2503) is connected to the first target transistor (Q2).

13. The battery assembly of claim 10, wherein the battery assembly (200) further comprises a second protection module (280), the second protection module (280) comprising a plurality of second protection sub-modules (2801); the second impedance adjustment module (240) is connected in series with the second protection sub-module (2801);

wherein the second impedance adjustment module (240) comprises a second transistor (Q3), and an output terminal of the subtraction device (2503) is connected to the second transistor (Q3) through the inverter (2504);

alternatively, the second impedance adjusting module (240) includes a second current source (I2) and a second triode (T2) connected to the second current source (I2), and the output end of the subtraction device (2503) is connected to the second triode (T2) through the inverter (2504) and the second current source (I2).

14. The battery assembly of claim 10, wherein the battery assembly (200) further comprises a second fuel gauge module (290), the second fuel gauge module (290) comprising a second fuel gauge (2901) and a second target transistor (Q4) connected to the second fuel gauge (2901); -the second impedance adjustment module (240) comprises the second target transistor (Q4); the output of the subtraction device (2503) is connected to the second target transistor (Q4) through the inverter (2504).

15. The battery assembly of claim 7, wherein the first impedance adjustment module (230) comprises a first transistor (Q1);

adjusting a voltage difference between a gate and a source of the first transistor to change an impedance of the first transistor under a condition that the battery assembly is operating normally, thereby adjusting an impedance of the first impedance adjustment module (230);

and under the condition that the battery assembly is abnormal, adjusting the voltage difference between the grid electrode and the source electrode of the first transistor to disconnect the first transistor, and stopping power supply of the battery assembly.

16. An electronic device comprising the battery of any one of claims 1-6, or the battery assembly of any one of claims 7-15.