CN111740465A

CN111740465A - Battery charge-discharge detection device and intelligent wearable equipment

Info

Publication number: CN111740465A
Application number: CN202010643605.8A
Authority: CN
Inventors: 赵国鑫
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-10-02
Anticipated expiration: 2040-07-06
Also published as: CN111740465B

Abstract

The invention discloses a battery charge-discharge detection device and an intelligent wearable device, wherein the battery charge-discharge detection device comprises: an electric control board; a charge and discharge circuit electrically connected to the plurality of batteries, the charge and discharge circuit configured to charge/discharge the batteries; the battery current sensing circuits are arranged on the electric control board, and the number of the battery current sensing circuits corresponds to that of the batteries; the battery current sensing circuit is configured to detect the induced current of the battery and output a corresponding current detection signal when the charging and discharging circuit charges or discharges the battery; and the charge and discharge control circuit is respectively connected with the output ends of the battery current sensing circuits and is configured to control the charge and discharge circuit to work according to the current detection signals output by the battery current sensing circuits. The invention realizes the charge and discharge detection of the multi-battery system.

Description

Battery charge-discharge detection device and intelligent wearable equipment

Technical Field

The invention relates to the technical field of wearable equipment, in particular to a battery charging and discharging detection device and intelligent wearable equipment.

Background

In an electronic product provided with a multi-battery system, at least two batteries are usually arranged, when a plurality of batteries are arranged in parallel, because each storage battery has different aspects such as electric capacity, charging efficiency, electric leakage and the like, after almost identical multiple charging and discharging cycles, partial storage batteries may be premature, so that an unbalanced phenomenon may occur between the two batteries in the charging or discharging process, and therefore, the charging and discharging states of the two batteries need to be monitored, but the charging and discharging states of the multi-battery system are difficult to judge at present.

Disclosure of Invention

The invention mainly aims to provide a battery charging and discharging detection device and intelligent wearable equipment, and aims to realize charging and discharging detection of a multi-battery system.

In order to achieve the above object, the present invention provides a battery charging/discharging detection device, which is applied to an intelligent wearable device, wherein the intelligent wearable device includes a plurality of batteries connected in parallel, and the battery charging/discharging detection device includes:

an electric control board;

a charge and discharge circuit electrically connected to the plurality of batteries, the charge and discharge circuit configured to charge/discharge the batteries;

the battery current sensing circuits are arranged on the electric control board, and the number of the battery current sensing circuits corresponds to that of the batteries; the battery current sensing circuit is configured to detect an induced current of the battery and output a corresponding current detection signal when the charging and discharging circuit charges or discharges the battery;

and the charge and discharge control circuit is respectively connected with the output ends of the plurality of battery current sensing circuits and is configured to control the charge and discharge circuit to work according to the current detection signals output by the plurality of battery current sensing circuits.

Optionally, the charging and discharging circuit includes a charging circuit and a discharging circuit, an input end of the charging circuit is connected to the dc power supply, and an output end of the charging circuit is electrically connected to the plurality of batteries; the input end of the discharging circuit is electrically connected with the batteries, and the discharging circuit is electrically connected with the load of the intelligent wearable device.

Optionally, in the process of charging the battery by the charging circuit, the charging and discharging control circuit is specifically configured to control the charging circuit to reduce the charging voltage of the battery when it is determined that the plurality of batteries are in an unbalanced charging state according to the current detection signals output by the plurality of battery current sensing circuits;

and when determining that a plurality of batteries are in an equalizing charge state, controlling the charging circuit to maintain the current charging voltage output of the batteries.

Optionally, in the process of discharging the battery by the discharge circuit, the charge and discharge control circuit is specifically configured to control the discharge circuit to stop discharging the battery when it is determined that the plurality of batteries are in an unbalanced charge and discharge state according to the current detection signals output by the plurality of battery current sensing circuits;

and when determining that the plurality of batteries are in the balanced discharge state, controlling the discharge circuit to maintain the current discharge voltage output of the batteries.

Optionally, each of the battery current sensing circuits comprises:

the magnetic core is arranged close to a connecting wire of the charging and discharging circuit and the battery;

and the current induction device is arranged corresponding to the magnetic core.

Optionally, the electric control board is provided with a mounting groove adapted to the magnetic core, and the magnetic core is embedded in the mounting groove.

Optionally, the current sensing device is one or more of an inductive resistor, a hall sensor, a giant magnetoresistance sensor, and a rogowski current sensor.

Optionally, each of the battery current sensing circuits further comprises:

and the signal amplifying circuit is electrically connected with the current sensing device.

The invention also provides intelligent wearable equipment which comprises a plurality of batteries arranged in parallel and the battery charging and discharging detection device.

Optionally, a plurality of the batteries are arranged on an electric control board of the battery charging and discharging detection device;

or the batteries are electrically connected with the electric control board of the battery charging and discharging detection device through a lead or a flexible circuit.

The charging and discharging control circuit comprises a plurality of battery current sensing circuits, a charging and discharging control circuit and a charging and discharging control circuit, wherein the plurality of battery current sensing circuits are arranged corresponding to the number of batteries so as to detect the current of a power line VCC connected with the batteries and the charging and discharging circuit, and the detected current detection signal is output to the charging and discharging control circuit, so that the charging and discharging control circuit controls the charging and discharging circuit to work according to the current detection signals output by the plurality of battery current sensing circuits, and the charging and discharging detection of the multi-battery. The current detection system of the marine electric propeller solves the problems that when a current sampling resistor directly measures current, a resistance element is easy to heat, the service life of the resistance element is shortened, and meanwhile, due to small voltage drop of the resistance element, the resolution requirement of a digital-to-analog converter for converting a resistance voltage signal is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic circuit diagram of a battery charging/discharging detection device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery charging/discharging detection device according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Charging and discharging circuit	12	Current sensing device
21、22	Battery current sensing circuit	BAT1、BAT1	Battery with a battery cell
				30	Charge-discharge control circuit	100	Electric control board
11	Magnetic core	VCC	Power line

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The invention provides a battery charging and discharging detection device, which is applied to intelligent wearable equipment.

It can be understood that batteries, especially lithium batteries, are increasingly used in daily life and production, and portable devices, intelligent wearing and other products can show the shadow everywhere. The application of the single battery in the product is limited by factors such as design indexes, ID, structure and the like. In order to meet design requirements, electronic products are increasingly required to have multi-cell parallel systems with equal capacity and equal voltage. Electronic products using the multi-battery system can be mobile terminals and intelligent wearable devices such as mobile phones, tablet computers, intelligent watches, intelligent bracelets and wireless earphones. In the multi-battery system, at least two batteries are arranged, and a plurality of batteries can be arranged in parallel or in series or in parallel after being arranged in series. The following embodiments of the present invention are described by taking an example in which two batteries are connected in parallel. When two batteries are arranged in parallel, because each storage battery is different in various aspects such as electric capacity, charging efficiency, electric leakage and the like, after almost completely identical multiple charging and discharging cycles, partial storage batteries may be premature, so that the phenomenon of imbalance between the two batteries in the charging or discharging process can be caused, and therefore, the charging and discharging states of the two batteries need to be monitored. In order to complete the charging and discharging detection of the parallel-connected multiple batteries, a small resistor is often connected in series in a battery loop, and the voltage on the resistor is collected to judge whether the charging and discharging process is normal. But doing so would result in a more complex circuit design and more power consumption. The software tests the curve of the whole charging process, and can judge whether the two batteries are in a parallel charging state. However, the charging process usually lasts for a long time, usually 30 minutes to 1 hour is required, the requirement of production working hours cannot be met, and misjudgment is easy to occur.

In order to solve the above problem, referring to fig. 1 and 2, in an embodiment of the present invention, the battery charge/discharge detection apparatus includes:

an electric control board 100;

a charge and discharge circuit 10 electrically connected to the plurality of batteries (BAT1, BAT2), the charge and discharge circuit 10 configured to charge/discharge the batteries (BAT1, BAT 2);

a plurality of battery current sensing circuits (21, 22) disposed on the electronic control board 100, wherein the number of the battery current sensing circuits (21, 22) corresponds to the number of the batteries (BAT1, BAT 2); the battery current sensing circuits (21, 22) are configured to detect induced currents of the batteries (BAT1, BAT2) and output corresponding current detection signals when the charging and discharging circuit 10 charges or discharges the batteries (BAT1, BAT 2);

and the charge and discharge control circuit 30 is respectively connected with the output ends of the plurality of battery current sensing circuits (21, 22), and the charge and discharge control circuit 30 is configured to control the charge and discharge circuit 10 to work according to the current detection signals output by the plurality of battery current sensing circuits (21, 22).

In this embodiment, this battery charge and discharge detection device can be applied to wireless earphone, intelligent wrist-watch etc. intelligence and wear equipment in, and wireless earphone can be bluetooth headset, perhaps wireless earphones such as infrared ray earphone. In wireless headsets, batteries (BAT1, BAT2) may be used to power electrical loads in the headset, which may be speakers, microphones, indicator lights, micro-motors, sensors, etc.

The electric control board 100 may be implemented by a circuit substrate made of DBC board, PCB board, half glass fiber board, or any one of an aluminum substrate, an aluminum alloy substrate, a copper substrate, or a copper alloy substrate. The shape of the electronic control board 100 may be set according to the applied smart wearable device, for example, the specific position, number and size of the electronic devices in the smart wearable device are determined, and the electronic control board 100 may be circular, but is not limited to circular. When the electric control board 100 is implemented by using a PCB, the PCB includes a circuit wiring layer and an insulating layer, and the circuit wiring layer forms corresponding lines and mounting positions, i.e. pads, for mounting electronic components in the charging and discharging circuit 10, the battery current sensing circuits (21, 22) and the charging and discharging control circuit 30, on the electric control board 100 according to the circuit design of the intelligent wearable device. Specifically, after an insulating layer is provided on the electronic control board 100, a copper foil is laid on the insulating layer and etched according to a preset circuit design, thereby forming a circuit wiring layer. After the electronic components in the power module are integrated in the circuit wiring layer on the electronic control board 100, the electronic components and the driving chip can be electrically connected through the metal leads.

The charging and discharging circuit 10 may include a charging circuit and a discharging circuit, wherein an input terminal of the charging circuit is connected to a dc power supply, and an output terminal of the charging circuit is electrically connected to the plurality of batteries (BAT1, BAT 2); the input end of the discharging circuit is electrically connected with the batteries (BAT1, BAT2), and the discharging circuit is electrically connected with a load of the intelligent wearable device. The charging circuit can be realized by adopting a charging chip, a DC-DC circuit and the like, and is used for converting the external voltage acquired by the charging port into the charging voltage of each battery (BAT1, BAT2) to charge each battery (BAT1, BAT 2). The controlled end of the charging chip is connected with the charging and discharging control circuit 30, the charging chip is controlled by the charging and discharging control circuit 30, the batteries (BAT1 and BAT2) are connected with the charging chip through the direct current bus, and the charging chip controls the charging of the batteries (BAT1 and BAT 2). The charging chip U3 generally has a sleep state, i.e., a standby state, a normal operating state, and an off state. The electric energy accessed by the charging interface is usually higher or lower than the energy storage voltage of the batteries (BAT1, BAT2), so the accessed power supply voltage needs to be boosted or reduced through the DC-DC conversion circuit, and then converted into the energy storage voltage of the batteries (BAT1, BAT2) for output. The charging chip can also perform trickle charging, constant current charging or constant voltage charging on the batteries (BAT1, BAT2) so as to realize charging modes such as quick charging or slow charging on the batteries (BAT1, BAT 2). The range of the stored electric energy of the batteries (BAT1, BAT2) can be set to 3.5-5V, specifically 3.9V, 4.3V and the like, and the batteries (BAT1, BAT2) can be realized by rechargeable batteries (BAT1, BAT2) such as lithium ion storage batteries (BAT1, BAT2) or nickel-metal hydride batteries (BAT1, BAT 2). The discharging circuit can be realized by adopting elements such as a power management chip and a discharging switch, the power management chip and the discharging switch are connected with the charging and discharging control circuit 30, and based on the control of the charging and discharging control circuit 30, the power management chip can provide working voltage with corresponding size, such as 3.3V, for each load module when the intelligent wearable device works. The discharge switch can be MOS pipe, triode class switch tube, and at intelligent wearing equipment during operation, the discharge switch switches on for other load module of wearable equipment provide the power. The number of switch paths of the discharge switch is the same as the number of batteries (BAT1, BAT 2).

The battery current sensing circuits (21, 22) are provided in correspondence with the number of batteries (BAT1, BAT2), are provided in non-contact with the charge/discharge lines of the batteries (BAT1, BAT2), and are specifically provided in an insulated manner from the power supply lines VCC of the batteries (BAT1, BAT2), and detect the induced magnetic field generated by the current flowing through the power supply lines VCC of the batteries (BAT1, BAT2) in accordance with the characteristics of electromagnetic induction. The battery current sensing circuits (21, 22) are disposed close to the power supply lines VCC of the batteries (BAT1, BAT2), detect currents flowing through the power supply lines VCC of the batteries (BAT1, BAT2) in an indirect manner, and output corresponding current detection signals.

The charge and discharge control circuit 30 is provided with a main controller, which may be implemented by a dedicated wireless headset control chip in a wireless headset or by an independent microprocessor, and is not limited herein. Feedback pins for receiving current detection signals of the batteries (BAT1, BAT2) are arranged on a chip of the main controller, the main controller can determine the current magnitude of each battery (BAT1, BAT2) according to the current detection signals, and can also perform overcurrent, overcharge and overdischarge protection on the batteries (BAT1, BAT2) according to the current detection signals. The main controller may be a microprocessor such as a single chip, a DSP, and an FPGA, and those skilled in the art can integrate some hardware circuits and software programs or algorithms into the main controller to compare and calculate the current signal, for example, the main controller is integrated with hardware circuits such as a memory, a comparator, an ADC conversion circuit, and a filter, or a software algorithm program for analyzing and comparing the received current detection signal. The current magnitude and the current magnitude relation of each battery (BAT1, BAT2) in the charging/discharging process are calculated by operating or executing a software program and/or a module stored in a memory of the main controller, calling data stored in the memory, converting the analog current detection signal into a digital signal by an ADC (analog-to-digital converter) circuit integrated in the main controller, and comparing, analyzing and the like the current detection signal converted into the digital signal by a software algorithm program and/or a hardware circuit module integrated in the main controller. For example, the obtained charging and discharging currents of the batteries (BAT1, BAT2) are subjected to difference calculation, whether the difference calculation result is within a preset difference allowable range is determined, whether charging and discharging among the batteries (BAT1, BAT2) are balanced is determined, and the charging and discharging circuit 10 is controlled to work according to whether the discharging is balanced, so that the output voltage of the charging and discharging circuit 10 is adjusted.

The invention is provided with a plurality of battery current sensing circuits (21, 22) corresponding to the quantity of batteries (BAT1, BAT2) to detect the current of a power line VCC connected with the batteries (BAT1, BAT2) and the electric charge and discharge circuit 10, and outputs the detected current detection signal to the charge and discharge control circuit 30, so that the charge and discharge control circuit 30 controls the charge and discharge circuit 10 to work according to the current detection signals output by the plurality of battery current sensing circuits (21, 22). The battery charging and discharging detection device provided by the invention solves the problems that when the current sampling resistor is used for directly measuring the current, the resistance element is easy to generate heat, the service life of the resistance element is shortened, and the resolution requirement of a digital-to-analog converter for converting a resistance voltage signal is high due to small voltage drop of the resistance element.

Referring to fig. 1 and 2, in an embodiment, during a process that the charging circuit charges the batteries (BAT1, BAT2), the charging and discharging control circuit 30 is specifically configured to control the charging circuit to reduce the charging voltage of the batteries (BAT1, BAT2) when determining that the batteries (BAT1, BAT2) are in an unbalanced charging state according to current detection signals output by the battery current sensing circuits (21, 22);

when a plurality of batteries (BAT1, BAT2) are determined to be in an equalized charging state, the charging circuit is controlled to maintain the current charging voltage output of the batteries (BAT1, BAT 2).

In this embodiment, in the current process when the batteries (BAT1, BAT2) are charged, the charging circuit is in an operating state, and the batteries BAT1 and BAT2 are charged. The charging circuits of the battery BAT1 and the battery BAT2 are respectively arranged in the environment of the independent current detection circuit of the batteries (BAT1 and BAT 2). The independent battery current detection circuits detect currents of the respective batteries (BAT1, BAT 2). Battery (BAT1, BAT2) current sensing circuits process signals from respective magnetosensors. And transmits the detection data to the charge and discharge control circuit 30 in real time, and the charge and discharge control circuit 30 judges whether the values of the cell current detection circuits are equivalent or not. If the detected values of battery current detection circuit 21 and battery current detection circuit 22 are greatly different and greater than the preset allowable difference range, it is indicated that battery BAT1 and battery BAT2 are in an unbalanced charged state. If the difference between the battery current detection circuit 21 and the battery current detection circuit 22 is not large and is within the preset difference allowable range, it indicates that the battery BAT1 and the battery BAT2 are in the state of equalizing charge. If the batteries BAT1 and BAT2 are detected to be in an unbalanced charging state, the charge-discharge control circuit 30 may reduce the output voltage for charging the batteries (BAT1, BAT2) or reduce the output voltage for discharging, and may also stop charging the batteries (BAT1, BAT2) when the difference between the detected values of the batteries (BAT1, BAT2) is greater than a certain threshold value, thereby preventing overcharging of a single battery (BAT1, BAT 2).

Referring to fig. 1 and 2, in an embodiment, during a process that the discharging circuit discharges the batteries (BAT1, BAT2), the charging and discharging control circuit 30 is specifically configured to control the discharging circuit to stop discharging the batteries (BAT1, BAT2) when determining that the batteries (BAT1, BAT2) are in an unbalanced charging and discharging state according to current detection signals output by the battery current sensing circuits (21, 22);

when determining that a plurality of batteries (BAT1, BAT2) are in an equilibrium discharge state, controlling the discharge circuit to maintain the current discharge voltage output of the batteries (BAT1, BAT 2).

In this embodiment, in the current process when the batteries (BAT1, BAT2) are discharged, the discharge circuit is in an operating state, and discharges the batteries BAT1 and BAT 2. The discharge lines of the battery BAT1 and the battery BAT2 are respectively arranged in the environment of the independent battery (BAT1 and BAT2) current detection circuit. The independent battery current detection circuits detect currents of the respective batteries (BAT1, BAT 2). Battery (BAT1, BAT2) current sensing circuits process signals from respective magnetosensors. And transmits the detection data to the charge and discharge control circuit 30 in real time, and the charge and discharge control circuit 30 judges whether the values of the cell current detection circuits are equivalent or not. If the detected values of battery current detection circuit 21 and battery current detection circuit 22 are greatly different and greater than the preset allowable range of difference, it is indicated that battery BAT1 and battery BAT2 are in an unbalanced discharge state. If the phase difference between the battery current detection circuit 21 and the battery current detection circuit 22 is not large and is within the preset allowable difference range, it indicates that the battery BAT1 and the battery BAT2 are in the balanced discharge state. If the batteries BAT1 and BAT2 are detected to be in an unbalanced discharge state, the charge and discharge control circuit 30 can reduce the output voltage for discharging the batteries (BAT1 and BAT2) or reduce the output voltage for discharging, and when the difference between the detected values of the batteries (BAT1 and BAT2) is larger than a certain threshold value, the charge and discharge control circuit can stop discharging the batteries (BAT1 and BAT2), so that the over-discharge of the single batteries (BAT1 and BAT2) is prevented.

Referring to fig. 1 and 2, in an embodiment, each of the battery current sensing circuits (21, 22) includes:

a magnetic core 11, the magnetic core 11 being disposed close to a connection line between the charge and discharge circuit 10 and the battery (BAT1, BAT 2);

and a current induction device 12 disposed corresponding to the magnetic core 11. Wherein, the current sensing device 12 is one or more of an inductive resistor, a hall sensor, a giant magnetoresistance sensor, and a Rogowski current sensor. The resistance of the sense resistor as the current sensing device 12 is generally very small, typically several tens of milli-Ohms (milli-Ohms). Of course, the current sensing device 12 may be other devices, and is not limited thereto, for example, in other embodiments, the current sensing device 12 may also be a current sensor (e.g., a hall current sensor, a rogowski current sensor, etc.). The same or different current sensing devices 12 may be provided between the battery current sensing circuits (21, 22) as required, and for example, resistance sensors or the like may be used for both of them. For example, when implemented using a hall sensor, the hall sensor generates an induced voltage signal proportional to the magnetic induction when it senses a magnetic field perpendicular thereto. The hall sensors can be placed on two sides of the magnetic core 11 which needs to measure current in pairs, and the placing directions of the hall pairs are different, so that electromagnetic interference from all directions outside the chip is eliminated. N/2 respectively induces magnetic fields to the Hall plate to generate induced voltage signals in direct proportion to the magnetic induction intensity, when the two induced voltage signals receive external interference, the induced voltage signals can be increased or reduced simultaneously, and the difference value of the two signals is unchanged. The two signals form a differential signal, and external interference can be effectively eliminated.

Referring to fig. 1 and 2, in an embodiment, the electric control board 100 is provided with a mounting groove adapted to the magnetic core 11, and the magnetic core 11 is embedded in the mounting groove.

In this embodiment, the mounting groove can set up to the recess, also can set up to the through-hole, and magnetic core 11 can be partly or whole set in the mounting groove, and the size of mounting groove can with 11 adaptations of magnetic core, perhaps install back in the mounting groove at magnetic core 11, fix through insulating viscous material, for example, insulating cement, when installing magnetic core 11, can bury magnetic core 11 at automatically controlled board 100, and the mode of rethread closure rubberizing is firmly in the same place with magnetic core 115 and circuit board. The power supply line VCC of the batteries (BAT1, BAT2) may be disposed on the electronic control board 100 by way of circuit wiring and wound around the periphery of the magnetic core 11, so that the magnetic core 11 is brought close to the output line of the batteries (BAT1, BAT2) in a non-contact manner. The magnetic core 11 can enhance the current detection strength, thereby improving the detection sensitivity. The magnetic core 11 is directly embedded into the PCB, so that a lot of space can be saved for the PCB, meanwhile, the performance matching between the PCB and the electronic component can be optimized, the PCB board-level wiring and the embedded magnetic core 11 are adopted to reduce the volume, improve the current sensitivity of the batteries (BAT1 and BAT2) and eliminate the external interference. The invention can also solve the problem that the current detection circuit of the battery (BAT1, BAT2) is limited by volume ID, cost, field condition and the like, and the measurement detection result is greatly interfered by the outside world so that the magnitude of the charging current cannot be accurately detected. And the complexity of circuit design can be reduced, and the reliability is improved. The charging and discharging states of the multi-battery (BAT1, BAT2) can be conveniently tested on the welded and assembled finished product. And the detection time is short, and the accuracy is high. The non-contact and disassembly-free measurement is to improve the production efficiency and the reliability of the product.

Referring to fig. 1 and 2, in an embodiment, each of the battery current sensing circuits (21, 22) further includes:

a signal amplification circuit (not shown) electrically connected to the current sensing device 12.

The signal amplifying circuit amplifies the power of the induced current signal output by the current sensing device 12 and outputs the amplified signal. It is easy to understand that the signal output by the current sensing device 12 is weak, and the weak signal needs to be amplified by the amplifying module 105 for power enhancement. In some embodiments, the battery current sensing circuit (21, 22) may further be provided with an AD conversion circuit to convert the voltage output by the signal amplification circuit into a digital signal, so that the charge and discharge control circuit 30 performs corresponding control according to the received digital signal output by the AD conversion circuit. The signal amplifying circuit can be realized by an amplifying circuit composed of elements such as an operational amplifier and a triode.

The invention also provides intelligent wearable equipment which comprises a plurality of batteries arranged in parallel and the battery charging and discharging detection device. The detailed structure of the battery charge and discharge detection device can refer to the above embodiments, and is not described herein again; it can be understood that, because the battery charging and discharging detection device is used in the intelligent wearable device of the present invention, the embodiment of the intelligent wearable device of the present invention includes all technical solutions of all embodiments of the battery charging and discharging detection device, and the achieved technical effects are also completely the same, and are not described herein again.

In one embodiment, the plurality of batteries are arranged on an electric control board of the battery charging and discharging detection device;

or the batteries are electrically connected with the electric control board of the battery charging and discharging detection device through a lead or a flexible circuit. Through the battery charge-discharge detection device, the parallel charge-discharge self-detection of multiple batteries can be completed. Wherein, intelligence wearing equipment can be wireless earphone, intelligent wrist-watch, intelligent bracelet etc..

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a battery charge and discharge detection device, is applied to in the intelligent wearing equipment, the intelligent wearing equipment includes the battery of a plurality of parallelly connected settings, its characterized in that, battery charge and discharge detection device includes:

an electric control board;

2. The battery charge and discharge detection device of claim 1, wherein the charge and discharge circuit comprises a charge circuit and a discharge circuit, wherein an input terminal of the charge circuit is connected to a dc power supply, and an output terminal of the charge circuit is electrically connected to the plurality of batteries; the input end of the discharging circuit is electrically connected with the batteries, and the discharging circuit is electrically connected with the load of the intelligent wearable device.

3. The battery charge/discharge detection device according to claim 2, wherein the charge/discharge control circuit is configured to control the charge circuit to decrease the charge voltage of the battery when the plurality of batteries are determined to be in the unbalanced charge state according to the current detection signals output by the plurality of battery current sensing circuits during the process of charging the battery by the charge circuit;

4. The battery charge/discharge detection device according to claim 2, wherein the charge/discharge control circuit is configured to control the discharge circuit to stop discharging the battery when the plurality of batteries are determined to be in the unbalanced charge/discharge state according to the current detection signals output by the plurality of battery current sensing circuits during the discharge of the battery by the discharge circuit;

5. The battery charge and discharge detection device according to any one of claims 1 to 4, wherein each of the battery current sensing circuits comprises:

6. The battery charge-discharge detection device according to claim 5, wherein the electric control board is provided with an installation groove adapted to the magnetic core, and the magnetic core is embedded in the installation groove.

7. The battery charge and discharge sensing device of claim 5, wherein the current sensing device is one or more of an inductive resistor, a Hall sensor, a giant magnetoresistance sensor, and a Rogowski current sensor.

8. The battery charge and discharge detection device of claim 5, wherein each of said battery current sensing circuits further comprises:

9. An intelligent wearable device, characterized by comprising a plurality of batteries arranged in parallel and the battery charging and discharging detection device according to any one of claims 1 to 8.

10. The intelligent wearable device according to claim 9, wherein a plurality of the batteries are disposed on an electronic control board of the battery charging and discharging detection device;