CN106712167A - Charging power supply protection device - Google Patents

Abstract

The invention discloses a charging power protection device, comprising: a battery pack, an electronic switch matrix unit connected to the battery pack, a central processing unit connected to the electronic switch matrix unit, and a battery pack connected to the battery pack and the electronic switch matrix unit. A safety management unit between the central processing units; wherein, the battery pack includes a first battery in use and a second battery to be charged; the electronic switch matrix unit is connected to each battery, and when receiving the central processing unit When the switching command of the battery is selected, the output circuit of at least one of the batteries is selected; the safety management unit is provided with a power-down protection memory for monitoring the power of each battery in the battery pack and identifying the charge in the battery pack. loop; the central processing unit is used to send a cut-off command to the electronic switch matrix unit to cut off the charging loop therein when judging that the current environment is abnormal. By adopting the invention, energy consumption can be reduced and reliability can be improved.

Description

A charging power protection device

technical field

The present invention relates to the technical field of safety precautions for battery use, and more particularly relates to a protection device for a charging power source.

Background technique

Today, lithium-ion batteries are widely used in portable electronic devices such as mobile phones, camcorders, notebook computers, cordless phones, power tools, remote control or electric toys, and cameras due to their excellent characteristics. The negative electrode of a lithium-ion battery is graphite crystals, and the positive electrode is usually lithium dioxide. When charging, lithium ions move from the positive electrode to the negative electrode and are embedded in the graphite layer. During discharge, lithium ions detach from the surface of the negative electrode in the graphite crystal and move to the positive electrode. Therefore, during the charging and discharging process of the battery, lithium always appears in the form of lithium ions, not in the form of metallic lithium. Therefore, this battery is called a lithium-ion battery, or lithium battery for short. It is precisely because lithium batteries have many advantages such as small size, large capacity, light weight, no pollution, high single-cell voltage, low self-discharge rate, and many battery cycles, so that it gradually replaces some old-fashioned batteries and is favored by today's electronics. Favored in the field of technology.

However, as a battery, safety is always an unavoidable problem in the process of charging and discharging it.

Contents of the invention

In view of the above problems, the present invention proposes a charging power protection device, which can reduce energy consumption and improve reliability.

An embodiment of the present invention provides a charging power supply protection device, including:

A battery pack, an electronic switch matrix unit connected to the battery pack, a central processing unit connected to the electronic switch matrix unit, and a safety management unit connected between the battery pack and the central processing unit;

Wherein, the battery pack includes a first battery in use and a second battery to be charged; the electronic switch matrix unit is connected to each battery, and when receiving a switching instruction from the central processing unit, gates at least one of them The output circuit of the battery;

The safety management unit is provided with a power-down protection memory for monitoring the power of each battery in the battery pack and identifying the charging circuit in the battery pack; the central processing unit is used for judging that the current environment is abnormal A cut-off command is sent to the electronic switch matrix unit to cut off the charging circuit therein.

Preferably, include:

A loudspeaker connected to the central processing unit, used to give an alarm when the battery needs to be charged or the environment is abnormal;

The central processing unit is further configured to judge that the first battery or the second battery needs to be charged according to the detected electric quantity being lower than a preset value.

Preferably, include:

a microphone connected to the central processing unit for receiving sounds around the battery pack during charging;

The central processing unit is further configured to determine that the current environment is abnormal when identifying that the voice contains a child's voiceprint and/or the volume of the child's voiceprint is greater than a preset value.

Preferably, include:

An infrared detection unit connected to the central processing unit, used for sensing the temperature around the battery pack during charging;

The central processing unit is also used to determine that the current environment is abnormal when identifying that the temperature is higher than a preset value.

Preferably, include:

A bluetooth detection unit connected to the central processing unit, used to sense the bluetooth signal of the target device when charging;

The central processing unit is also used to determine that the current environment is abnormal when identifying that the signal strength of the Bluetooth signal is greater than a preset value.

Preferably, include:

A battery pack voltage acquisition unit connected between the battery pack and the central processing unit is used to collect the voltage of each battery in the battery pack.

Preferably, include:

The battery pack current collection unit connected between the battery pack and the central processing unit is used to collect the current of each battery in the battery pack.

Preferably, include:

The battery pack temperature acquisition unit connected between the battery pack and the central processing unit is used to collect the temperature of the working environment in the battery pack.

Preferably, the battery pack further includes at least one third battery that is fully charged but not in use.

Preferably, it also includes:

The charging plug-in device connected with the battery pack, wherein the device is provided with a spring connected with the charging plug.

Preferably, it also includes:

The central processing unit is further configured to send a first plugging and unplugging command to the battery plugging and unplugging device to eject the charging plug when it is judged that the battery pack is faulty.

Preferably, it also includes:

The central processing unit is further configured to send a second plugging and unplugging command to the battery plugging and unplugging device to eject the charging plug when judging that the current environment is abnormal.

Correspondingly, an embodiment of the present invention provides a robot, including: the aforementioned charging power protection device.

Compared with the prior art, the solution provided by the present invention includes a battery pack, an electronic switch matrix unit connected to the battery pack, a central processing unit connected to the electronic switch matrix unit, and a battery pack connected to the A security management unit between the CPUs mentioned above. The electronic switch matrix unit is responsible for the task of controlling the flow of signals, and uses power switches to switch the batteries of the battery pack. Wherein, the battery pack includes a first battery in use and a second battery to be charged, so that the other battery can be used to maintain the operation of the device when one of the batteries is charging or running out of power. The electronic switch matrix unit is connected to each battery, and gates the output circuit of at least one of the batteries when receiving a switching instruction from the central processing unit. The safety management unit is provided with a power-down protection memory for monitoring the power of each battery in the battery pack and identifying the charging circuit in the battery pack; the central processing unit is used for judging that the current environment is abnormal A cut-off command is sent to the electronic switch matrix unit to cut off the charging circuit therein. When the environmental abnormality includes battery failure, sudden power failure, leakage and overload, etc., due to the independent batteries in the battery pack, compared with the prior art, it takes a shorter time to fully charge, and the charging circuit fails Or when it is cut off, the normal power supply of another battery will not be affected, so energy consumption can be reduced and reliability can be improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a charging power supply protection device of the present invention.

Fig. 2 is a schematic diagram of the first embodiment of the charging power supply protection device of the present invention.

Fig. 3 is a schematic diagram of a second embodiment of the charging power supply protection device of the present invention.

Fig. 4 is a schematic diagram of a third embodiment of the charging power supply protection device of the present invention.

Fig. 5 is a schematic diagram of the robot of the present invention.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In some processes described in the specification and claims of the present invention and the above-mentioned drawings, a plurality of operations appearing in a specific order are contained, but it should be clearly understood that these operations may not be performed in the order in which they appear herein Execution or parallel execution, the serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. Additionally, these processes can include more or fewer operations, and these operations can be performed sequentially or in parallel. It should be noted that the descriptions of "first" and "second" in this article are used to distinguish different messages, devices, modules, etc. are different types.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Fig. 1 is a schematic diagram of the charging power supply protection device of the present invention, including:

A battery pack, an electronic switch matrix unit connected to the battery pack, a central processing unit connected to the electronic switch matrix unit, and a safety management unit connected between the battery pack and the central processing unit;

Wherein, the battery pack includes a first battery in use and a second battery to be charged; the electronic switch matrix unit is connected to each battery, and when receiving a switching instruction from the central processing unit, gates at least one of them The output circuit of the battery;

The safety management unit is provided with a power-down protection memory for monitoring the power of each battery in the battery pack and identifying the charging circuit in the battery pack; the central processing unit is used for judging that the current environment is abnormal A cut-off command is sent to the electronic switch matrix unit to cut off the charging circuit therein.

Compared with the prior art, the solution provided by the present invention includes a battery pack, an electronic switch matrix unit connected to the battery pack, a central processing unit connected to the electronic switch matrix unit, and a battery pack connected to the A security management unit between the CPUs mentioned above. The electronic switch matrix unit is responsible for the task of controlling the flow of signals, and uses power switches to switch the batteries of the battery pack. Wherein, the battery pack includes a first battery in use and a second battery to be charged, so that the other battery can be used to maintain the operation of the device when one of the batteries is charging or running out of power. The electronic switch matrix unit is connected to each battery, and gates the output circuit of at least one of the batteries when receiving a switching instruction from the central processing unit. The safety management unit is provided with a power-down protection memory for monitoring the power of each battery in the battery pack and identifying the charging circuit in the battery pack; the central processing unit is used for judging that the current environment is abnormal A cut-off command is sent to the electronic switch matrix unit to cut off the charging circuit therein. When the environmental abnormality includes battery failure, sudden power failure, leakage and overload, etc., due to the independent batteries in the battery pack, compared with the prior art, it takes a shorter time to fully charge, and the charging circuit fails Or when it is cut off, the normal power supply of another battery will not be affected, so energy consumption can be reduced and reliability can be improved.

It needs to be added that the above-mentioned central processor selects the 16-bit embedded single-chip microcomputer MC912DP512 of the HCS12 family as the core main CPU of the device. MC912DP512 is a highly integrated 16-bit microprocessor, which is a 16-bit embedded microcontroller series product of HCS12 family. It uses a high-density complementary metal-oxide semiconductor HCMOS process, which reduces the basic power consumption of the MCU. At the same time, it can further reduce the power consumption of the MCU through the low-power instruction (LPSTOP) of the CPU16 instruction set, which is especially suitable for robot control. MC912DP512 is a powerful single-chip microcomputer, its interior adopts modular structure design, mainly including central processing unit CPU16, clock and reset generator (CRG) that can be configured with timed interrupt, system port integration module PIM, periodic interrupt timer module ( PIT), 10-bit queue A/D converter (ATD) with external trigger conversion, enhanced capture timer (ECT), pulse width modulation module (PWM) that can provide hardware trigger source, 512KB on-chip program memory ( FLASH) and 14KB on-chip memory RAM and 4KB on-chip memory EEPROM, serial external port module (SPI) and asynchronous serial port module (SCI) and I2 bus module (IIC), while MC912DP512 also has a CAN2.0B protocol The (msCAN) module can realize CAN communication. They are designed in one chip, forming a square and flat integrated block CPU.

Fig. 2 is a schematic diagram of the first embodiment of the charging power supply protection device of the present invention. Fig. 2 is compared with Fig. 1, the embodiment of Fig. 2 judges the external environment of the battery pack through the loudspeaker, microphone, infrared detection unit and bluetooth detection unit, and prevents children from approaching and getting an electric shock.

As shown in Figure 2, including:

A loudspeaker connected to the central processing unit, used to give an alarm when the battery needs to be charged or the environment is abnormal;

The central processing unit is further configured to judge that the first battery or the second battery needs to be charged according to the detected electric quantity being lower than a preset value.

For example, the battery pack includes a first battery and a second battery, and the current robot is using the first battery to run, and the central processing unit judges that the first battery is lower than the preset value (such as 10%) according to the monitoring of the first battery. Need to recharge. At this time, the central processing unit drives a speaker connected to it to sound an alarm to prompt the user to charge.

As shown in Figure 2, including:

a microphone connected to the central processing unit for receiving sounds around the battery pack during charging;

The central processing unit is further configured to determine that the current environment is abnormal when identifying that the voice contains a child's voiceprint and/or the volume of the child's voiceprint is greater than a preset value.

Continuing from the above example, the user is charging the robot, and the central processing unit receives the sound around the battery pack through the microphone when charging. When a child approaches and makes a sound, the central processing unit recognizes that the sound contains the child's voiceprint and/or the child's voiceprint. The closer you are to the charging robot, the louder the voiceprint will be. When the voiceprint volume is greater than the preset value (such as 40 decibels), it is judged that the current environment is abnormal, and there is a risk of electric shock if children get too close.

At this time, the central processing unit drives the loudspeaker connected to it to sound an alarm to prompt the user.

As shown in Figure 2, including:

An infrared detection unit connected to the central processing unit, used for sensing the temperature around the battery pack during charging;

The central processing unit is also used to determine that the current environment is abnormal when identifying that the temperature is higher than a preset value.

Continuing from the above example, the user is charging the robot, and the central processing unit receives the temperature around the battery pack during charging through the infrared detection unit. For example, when the human body temperature is detected, when it is recognized that the temperature is higher than a preset value (such as 36 degrees), it is judged that the current environment is abnormal. During the plugging process, if someone gets too close, there is a risk of electric shock. Or, there is a boiling kettle next to the robot. Obviously, charging in this environment is very dangerous.

At this time, the central processing unit drives the loudspeaker connected to it to sound an alarm to prompt the user.

As shown in Figure 2, including:

A bluetooth detection unit connected to the central processing unit, used to sense the bluetooth signal of the target device when charging;

The central processing unit is also used to determine that the current environment is abnormal when identifying that the signal strength of the Bluetooth signal is greater than a preset value.

Continuing from the above example, the user is charging the robot, and the central processing unit senses the Bluetooth signal of the target device during charging through the Bluetooth detection unit. The target device is, for example, a children's watch held by a child. When the signal strength of the Bluetooth signal is greater than a preset value, it is determined that the current environment is abnormal. During the charging process, if children get too close, there is a risk of electric shock.

At this time, the central processing unit drives the loudspeaker connected to it to sound an alarm to prompt the user.

Fig. 3 is a schematic diagram of a second embodiment of the charging power supply protection device of the present invention. Comparing Fig. 3 with Fig. 2, the embodiment in Fig. 3 judges whether the battery pack has a safety risk by detecting the voltage, current and temperature inside the battery pack.

As shown in Figure 3, including:

A battery pack voltage acquisition unit connected between the battery pack and the central processing unit is used to collect the voltage of each battery in the battery pack.

The battery pack current collection unit connected between the battery pack and the central processing unit is used to collect the current of each battery in the battery pack.

The battery pack temperature acquisition unit connected between the battery pack and the central processing unit is used to collect the temperature of the working environment in the battery pack.

Preferably, the battery pack voltage acquisition unit adopts a centralized measurement scheme. The centralized measurement scheme has faster parameter measurement speed, better real-time performance, better data collection consistency, and lower cost, but it needs to solve the problems of common ground isolation and measurement accuracy for voltage measurement of series batteries, which is technically difficult. This battery pack performs voltage measurement in module units. The module voltage measurement adopts the voltage division scheme, adopts the floating ground technology, and quickly completes the data acquisition of the voltage of each module and the total voltage by scanning, so as to realize the time-division multiplexing of the hardware part and reduce the cost. Utilize the extremely high input impedance, excellent common-mode rejection, linearity, temperature stability, and reliability characteristics of the instrumentation amplifier to adjust the signal voltage after division for processing by the A/D module. A group of electronic switches are connected in front of the instrument amplifier to realize the positive and negative alternation of the module voltage.

The current sampling unit of the battery pack is the main basis for estimating the remaining capacity (SOC) of the battery. Therefore, the requirements for sampling accuracy, anti-interference ability, zero drift, temperature drift and linearity error are all very high. Compared with the voltage measurement of the battery pack module, the current measurement is more complicated, and the high-precision Hall sensor with fast response speed and excellent linearity must be selected as the current acquisition unit. In practice, we use the current sensor SMI300DCE, which is a closed-loop (compensated) current sensor based on the Hall principle, which has excellent accuracy, good linearity and best response time, and also has good anti-interference ability. The rated current of its primary side is 300A, which meets the requirements of system design. The rated current of the secondary side is 150mA, and its conversion ratio is 1:2000. The power supply is plus or minus 12V or plus or minus 15V.

We know that the working state of the battery has a very important relationship with its internal temperature and the working environment temperature. Therefore, temperature measurement is an important part of battery management. The battery pack temperature acquisition unit for temperature measurement is a digital temperature measurement device, such as DS1820 using a single bus.

Preferably, the battery pack further includes at least one third battery that is fully charged but not in use. In order to improve the endurance of the robot.

Fig. 4 is a schematic diagram of a third embodiment of the charging power supply protection device of the present invention. Fig. 5 is a schematic diagram of the robot of the present invention. The present embodiment will be further described below in conjunction with FIG. 4 and FIG. 5 .

As shown in Figure 4, it also includes:

The charging plug-in device connected with the battery pack, wherein the device is provided with a spring connected with the charging plug.

As shown in Figure 4, it also includes:

The central processing unit is further configured to send a first plugging and unplugging command to the battery plugging and unplugging device to eject the charging plug when it is judged that the battery pack is faulty.

As shown in Figure 4, it also includes:

The central processing unit is further configured to send a second plugging and unplugging command to the battery plugging and unplugging device to eject the charging plug when judging that the current environment is abnormal.

Continuing from the above example, when the user is charging the robot and judges that a fault has occurred inside the battery pack, or judges that the current environment outside the battery pack is abnormal, send a plug-in command to the charging plug-in device connected to the battery pack, wherein, The device is provided with a spring connected to the charging plug. After the charging plug-in device receives the plug-in command, the charging plug is ejected by a spring, so that the charging wire is separated from the robot. As shown in Figure 5, even if the child wants to take the robot away, since the charging wire has been separated from the robot, the child will not pull the wire or trip over the wire, thereby improving the safety of using electricity.

As shown in FIG. 5 , an embodiment of the present invention provides a robot, including: the aforementioned charging power supply protection device, which can reduce energy consumption and improve reliability.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of charge power supply protection equipment, it is characterised in that including：

Battery pack, the electronic switch matrix unit being connected with the battery pack, in being connected with the electronic switch matrix unit Central processor, and it is connected to the security managing unit between the battery pack and the central processing unit；

Wherein, the battery pack includes the first battery being currently in use, the second battery to be charged；The electronic switch matrix list Each battery is connected respectively for unit, when the switching command of the central processing unit is received, gates the defeated of wherein at least one battery Go out loop；

The security managing unit is provided with power-down protection storage, the electricity for monitoring each battery in the battery pack, and Recognize the charge circuit in the battery pack；The central processing unit, for when judging that current environment is abnormal to the electronics Switch matrix unit sends cut-out instruction, cuts off charge circuit therein.

2. charge power supply protection equipment according to claim 1, it is characterised in that including：

The loudspeaker being connected with the central processing unit, for sending alarm when battery needs charging or environmental abnormality；

The central processing unit is additionally operable to according to the electricity for monitoring less than preset value, judges first battery or described second Battery needs to charge.

3. charge power supply protection equipment according to claim 1, it is characterised in that including：

The microphone being connected with the central processing unit, the sound for receiving the battery pack when charging；

The central processing unit is additionally operable to recognize the vocal print volume of vocal print of the sound comprising children and/or children more than default During value, current environment exception is judged.

4. charge power supply protection equipment according to claim 1, it is characterised in that including：

The infrared detection unit being connected with the central processing unit, the temperature for sensing the battery pack when charging；

When the central processing unit is additionally operable to recognize the temperature higher than preset value, current environment exception is judged.

5. charge power supply protection equipment according to claim 1, it is characterised in that including：

The bluetooth detection unit being connected with the central processing unit, for the Bluetooth signal of the induction targets equipment when charging；

When the central processing unit is additionally operable to recognize the signal intensity of the Bluetooth signal more than preset value, judge that current environment is different Often.

6. charge power supply protection equipment according to claim 1, it is characterised in that including：

The battery voltage collecting unit between the battery pack and the central processing unit is connected to, for gathering the battery The voltage of each battery in group.

7. charge power supply protection equipment according to claim 1, it is characterised in that including：

The battery pack current collecting unit between the battery pack and the central processing unit is connected to, for gathering the battery The electric current of each battery in group.

8. charge power supply protection equipment according to claim 1, it is characterised in that including：

The battery pack temperature collecting unit between the battery pack and the central processing unit is connected to, for gathering the battery The temperature of working environment in group.

9. charge power supply protection equipment according to claim 1, it is characterised in that the battery pack also includes at least one Fill with electricity but the 3rd battery being not used by.

10. a kind of robot, it is characterised in that including：Charge power supply protection equipment as described in claim any one of 1-9.