CN112313851A - Power supply equipment - Google Patents
Power supply equipment Download PDFInfo
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- CN112313851A CN112313851A CN202080003354.5A CN202080003354A CN112313851A CN 112313851 A CN112313851 A CN 112313851A CN 202080003354 A CN202080003354 A CN 202080003354A CN 112313851 A CN112313851 A CN 112313851A
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- power supply
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- battery
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- 238000009434 installation Methods 0.000 claims abstract description 31
- 230000008859 change Effects 0.000 claims abstract description 3
- 238000007600 charging Methods 0.000 claims description 181
- 238000001514 detection method Methods 0.000 claims description 108
- 238000004891 communication Methods 0.000 claims description 83
- 230000017525 heat dissipation Effects 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 45
- 230000008569 process Effects 0.000 claims description 41
- 238000007599 discharging Methods 0.000 description 40
- 238000001816 cooling Methods 0.000 description 31
- 230000000875 corresponding effect Effects 0.000 description 27
- 238000010586 diagram Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 241000237983 Trochidae Species 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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- 230000005236 sound signal Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
A mobile power supply, the mobile power supply comprising: the battery pack comprises at least two battery packs, a first power tool and a second power tool, wherein the battery packs are detachably connected with the first power tool and supply power to the first power tool; a housing having at least two mounting portions detachably connected to the battery pack; the electric energy output port is electrically connected with the mounting part, detachably connected with the second electric tool and used for supplying power to the second electric tool; the circuit board is connected with the at least two battery packs in series and transmits the electric energy of the battery packs connected in series to the electric energy output port; alarm module, work as the battery package install in during the battery package installation department, the circuit board is right the battery package carries out electric quantity exhaustion and detects, when the battery package of discovery electric quantity exhaustion, through alarm module reminds the user to change the battery package.
Description
The present application claims priority from chinese patent application having application number 201910212319.3, filed 2019, 03, 20, the entire content of which is incorporated herein by reference.
The present invention relates to a power supply apparatus, and more particularly to a power supply apparatus for an electric power tool.
The run time of the battery pack will be greatly shortened due to the exhaustion of the life of the battery pack. Especially, in a power supply device in which a plurality of battery packs are connected in series, once one of the battery packs has a life that is exhausted, the overall discharge capacity becomes weak. It is therefore necessary to provide early warning of the life of the battery pack.
For a power supply apparatus composed of a plurality of battery packs, the discharge power or the charge power thereof is the sum of the plurality of battery packs. Thus, the power supply device is much more powerful than a single battery pack. In the case of high-power operation, heat generation is a very common problem. It is therefore necessary to solve the problem of heat generation of the power supply apparatus.
Disclosure of Invention
The invention provides a charging and discharging device with a function of detecting the service life of a battery pack, and the charging and discharging device can be compatible with new and old battery packs.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a mobile power supply includes: the battery pack comprises at least two battery packs, a first power tool and a second power tool, wherein the battery packs are detachably connected with the first power tool and supply power to the first power tool; a housing having at least two mounting portions detachably connected to the battery pack; the electric energy output port is electrically connected with the mounting part, detachably connected with the second electric tool and used for supplying power to the second electric tool; the circuit board is connected with the at least two battery packs in series and transmits the electric energy of the battery packs connected in series to the electric energy output port; alarm module, work as the battery package install in during the installation department, the circuit board is right the battery package carries out electric quantity exhaustion and detects, when discovering the battery package of electric quantity exhaustion, through alarm module reminds the user to change the battery package.
Optionally, the mounting portion is provided with a battery pack type identification pole BS, the battery pack type identification pole BS is connected with an identification element, the circuit board determines whether the battery pack is correctly accessed by identifying data of the identification element, when the circuit board determines that the battery pack is correctly accessed, data related to total capacity and data related to current capacity of the battery pack are obtained, and according to the data related to total capacity and the data related to current capacity, whether the electric quantity of the battery pack is exhausted is determined.
Optionally, the circuit board communicates with the battery pack through the battery pack type identification electrode, if the communication is successful, the data related to the total capacity and the data related to the current capacity are obtained through a communication mode, and if the communication is unsuccessful, the data related to the total capacity is obtained through identifying the data of the identification element.
Optionally, the circuit board obtains the theoretical total capacity and the current total capacity of the battery pack in a communication manner, compares the theoretical total capacity with the current total capacity, and determines whether the battery pack is depleted in electric quantity.
Optionally, the circuit board obtains a theoretical total capacity and a total discharge time of the battery pack in a communication manner, sets a reference value according to the theoretical total capacity, and compares the total discharge time with the set reference value to determine whether the battery pack is depleted in electric quantity.
Optionally, the circuit board obtains a theoretical total capacity of the battery pack by recognizing the data of the identification element, estimates a current total capacity of the battery pack according to an SOC algorithm, and determines whether the battery pack is depleted according to the theoretical total capacity and the current total capacity.
Optionally, the circuit board obtains a theoretical total capacity of the battery pack by recognizing data of the identification element, sets a reference value according to the theoretical total capacity, records a charging time used in a voltage interval in a charging process, and judges whether the battery pack is in electric quantity failure according to the charging time and the reference value.
Optionally, the circuit board determines whether the power failure of the battery pack occurs before the circuit board charges the battery pack.
Optionally, the circuit board determines whether the power failure of the battery pack occurs before the circuit board discharges the battery pack.
Optionally, the circuit board determines whether the power failure of the battery pack occurs in the process of charging the battery pack by the circuit board.
Optionally, the portable power source is provided with a strap assembly, and the strap assembly is detachably connected with the casing.
Optionally, the mobile power supply further includes an electric energy input port, the electric energy input port is detachably connected to an external power supply, and the circuit board converts the external power supply into a power supply suitable for charging the battery pack to charge the battery pack.
Optionally, the portable power source includes at least one cooling fan for cooling the battery pack, and the circuit board further includes a power detection module, the power detection module detects whether an external power source is input to the power input port, and the circuit board controls the cooling fan to start rotating or stop rotating according to a signal transmitted by the power detection module.
Optionally, the number of the installation parts is 4, the circuit board connects the 4 battery packs in series, and the output voltage of the mobile power supply is the sum of the output voltages of the 4 battery packs.
Optionally, the alarm module includes alarm submodules with the same number as the installation parts, and the alarm submodules are arranged near each installation part.
The present invention also provides a mobile power supply, including: the battery pack comprises at least two battery packs, a first power tool and a second power tool, wherein the battery packs are detachably connected with the first power tool and supply power to the first power tool; the shell comprises a top shell and a bottom shell, the top shell and the bottom shell are oppositely arranged, and the bottom shell is used for supporting the mobile power supply relative to the ground; the mounting part is arranged on the top shell, at least comprises a first mounting part and a second mounting part, and is detachably connected with the battery pack; the electric energy output port is electrically connected with the mounting part, detachably connected with the second electric tool and used for supplying power to the second electric tool; the circuit board is connected with the mounting part and the electric energy output port and transmits the electric energy of the battery pack to the electric energy output port; and the heat dissipation module comprises at least one heat dissipation fan for dissipating heat of the battery pack.
Optionally, the number of the heat dissipation fans is less than the number of the mounting portions.
Optionally, the cooling fan includes a first cooling fan, the first cooling fan is located between the first installation portion and the second installation portion, the mobile power supply further includes an air duct, the air duct includes a first air duct, and the first air duct guides the airflow of the first cooling fan to the first installation portion and the second installation portion.
Optionally, the mounting portion further includes a third mounting portion and a fourth mounting portion, the cooling fan further includes a second cooling fan, the air duct includes a second air duct, and the second air duct guides the airflow of the second cooling fan to the third mounting portion and the fourth mounting portion.
Optionally, the circuit board is disposed between the bottom casing and the top casing, and the heat dissipation fan is disposed between the circuit board and the top casing and near the mounting portion.
Optionally, portable power source still includes the electric energy input port, the electric energy input port is connected with external power source detachably, the circuit board will external power source converts for and is fit for giving the power that the battery package charges does the battery package charges, the circuit board still includes power detection module, power detection module detects whether there is external power source input in the electric energy input port, the circuit board basis the signal of power detection module transmission, control radiator fan starts to rotate or stops rotatoryly.
Optionally, the circuit board still includes instrument detection module and installation department detection module, instrument detection module detects whether the electric energy delivery outlet provides the electric energy to second electric tool, installation department detection module detects whether the installation department has the battery package to insert, the circuit board basis power detection module instrument detection module and the signal of installation department detection module transmission, control radiator fan starts rotatory or stop rotatory, works as the electric energy delivery inlet has external power source to input, just the electric energy delivery outlet does not provide the electric energy to second electric tool, and when the installation department inserted the battery package, control radiator fan starts rotatory.
Optionally, before controlling the cooling fan to start rotating, the circuit board detects whether the battery pack meets a charging condition, and when the battery pack meets the charging condition, the circuit board starts charging the battery pack and controls the cooling fan to start rotating.
Optionally, before the cooling fan is controlled to start rotation, the circuit board detects the temperature of the battery pack, and when the temperature of the battery pack is higher than a first preset temperature, and the battery pack does not satisfy the charging condition, the circuit board does not start charging the battery pack, and controls the cooling fan to start rotation.
Optionally, the circuit board detects the temperature of the battery pack, and when the temperature of the battery pack is recovered to meet a charging condition, the circuit board starts charging the battery pack and controls the cooling fan to continue rotating.
Optionally, the circuit board detects a temperature of the battery pack, and controls a rotation speed of the cooling fan according to the temperature of the battery pack, and the higher the temperature of the battery pack is, the higher the rotation speed of the cooling fan is controlled by the circuit board.
Optionally, the circuit board includes a first charging module and a second charging module that are parallel and independent to each other, and when the battery pack that the first installation department inserts satisfies the charging condition, and the battery pack that the second installation department inserts does not satisfy the charging condition, the first charging module outputs the charging electric energy to the first installation department, and the second charging module does not output the charging electric energy to the second installation department.
Optionally, when the power input port has an external power input, the power output port does not provide power to the second electric tool, and a part of the installation portion is connected to the battery pack, the circuit board controls a corresponding part of the heat dissipation fans to start rotation.
Optionally, when at least one of the following preset conditions is met, the circuit board controls the cooling fan to stop rotating, where the preset conditions are: 1) the electric energy input port has no external power supply input; 2) when the power output port supplies power to the second electric tool; 3) the installation part is not connected with a battery pack.
The present invention also provides a mobile power supply, including: the battery pack at least comprises a first battery pack and a second battery pack, and the battery pack can detachably supply power to the first electric tool; the battery pack comprises a shell, a battery pack and a battery pack, wherein the shell is at least provided with a first mounting part and a second mounting part, the mounting parts are detachably connected with the battery pack, each mounting part is provided with a first terminal group, and the first terminal groups are electrically connected with the battery pack; the electric energy output port is provided with a second terminal group, is electrically connected with the first terminal group, is detachably connected with the second electric tool and supplies power to the second electric tool; the circuit board is connected with the first terminal group and the second terminal group and transmits the electric energy of the battery pack to the electric energy output port; the first terminal group and the second terminal group have different functions of at least partial terminals.
Optionally, the first terminal group includes a first installation part signal terminal, the first installation part signal terminal alternatively receives an analog signal or a digital signal transmitted by the battery pack, the analog signal represents an intrinsic parameter of the battery pack, the digital signal represents an intrinsic parameter or a current operation parameter of the battery pack, the second terminal group includes a first output port signal terminal, and the first output port signal terminal outputs a digital signal representing a current operation parameter of the mobile power supply.
Optionally, the first terminal group further includes a second installation part signal terminal, the second installation part signal terminal receives an analog signal transmitted by the battery pack, the analog signal represents a current operation parameter of the battery pack, the second terminal group further includes a second output port signal terminal, and the second output port signal terminal outputs the analog signal representing the current operation parameter of the mobile power supply.
Optionally, the information represented by the digital signal output by the first output port signal terminal is at least partially overlapped with the information represented by the analog signal output by the second output port signal terminal.
Optionally, the circuit board includes first detection module and second detection module at least, the signal that the first terminal group of first installation department transmitted is received to first detection module, the signal that the first terminal group of second installation department transmitted is received to second detection module, the circuit board still includes host system, host system receives the information of first detection module and second detection module transmission, and the signal output who produces the present operating parameter of token removal after handling gives first delivery outlet signal terminal.
Optionally, when the information transmitted by the first detection module or the second detection module indicates that the first battery pack or the second battery pack is in an abnormal state, the main control module generates an analog signal indicating that the current moving operation parameter is abnormal and outputs the analog signal to the second output port signal terminal according to the information transmitted by the first detection module and the second detection module.
Optionally, the circuit board is connected in series with the battery pack, and transmits the electric energy obtained by connecting the battery pack in series to the second electric tool, and the working voltage of the second electric tool is N times of the working voltage of the first electric tool.
The present invention also provides a charging and discharging device having a charging mode and a discharging mode, comprising: a charging wire; an output cable; a housing having: at least one mounting part through which the charging and discharging device is detachably connected with the battery pack; the control board is accommodated in the shell, and a charging module and a discharging module are integrated on the control board; in a charging mode, the charging wire is connected to a mains supply, the output cable is not connected to the electric tool, and the charging and discharging equipment is electrically connected between the mains supply and the battery pack and charges the battery pack; in a discharging mode, the output cable is connected to the electric tool, the charging wire is disconnected with a mains supply, and the charging and discharging equipment is electrically connected between the battery pack and the electric tool and provides power for the electric tool;
wherein the control board is configured to perform power exhaustion detection of the battery pack when the battery pack is electrically connected with the charge and discharge device through the mounting portion; when the battery pack with the power failure is found, the user is reminded to replace the battery pack.
In one embodiment, the mounting part is provided with a battery pack type recognition pole BS configured to; when the battery pack is connected with the mounting part, judging whether the battery pack is correctly accessed; and after the battery pack is judged to be correctly accessed, identifying whether the battery pack has a communication function.
In one embodiment, the battery pack type identifier BS identifies the resistance value of the battery pack to determine whether the battery pack is correctly accessed.
In one embodiment, the charging module is configured to: when the battery pack belt has a communication function, acquiring the theoretical total capacity and the current total capacity of the battery pack through the battery pack type identification electrode BS; and judging whether the electric quantity of the battery pack is exhausted or not according to the theoretical total capacity and the current total capacity.
In one embodiment, the charging module determines whether the battery pack is depleted before the charging module charges the battery pack.
In one embodiment, the discharge module is configured to: when the battery pack belt has a communication function, acquiring the theoretical total capacity and the total discharge time of the battery pack in an internal communication mode; setting a reference value according to the theoretical total capacity; and comparing the total discharge time with a set reference value to judge whether the electric quantity of the battery pack is exhausted.
In one embodiment, the discharging module determines whether the battery pack is depleted before the discharging module discharges the battery pack.
In one embodiment, the charging module is configured to: when the battery pack does not have a communication function, acquiring the theoretical total capacity of the battery pack through the battery pack type identification pole BS; estimating the current total capacity of the battery pack according to an SOC algorithm; and judging whether the electric quantity of the battery pack is exhausted or not according to the theoretical total capacity and the current total capacity.
In one embodiment, the charging module is configured to: when the battery pack does not have a communication function, acquiring the theoretical total capacity of the battery pack through the battery pack type identification pole BS; setting a reference value according to the theoretical total capacity; recording the charging time used in a section of voltage interval in the charging process; and judging whether the electric quantity of the battery pack is exhausted or not according to the charging time and the reference value.
In one embodiment, the charging module determines whether the battery pack is depleted during the process of charging the battery pack by the charging module.
In one embodiment, the charging and discharging device is provided with a strap assembly detachably connected with the housing.
In one embodiment, the charging and discharging device is provided with a heat dissipation module, and the heat dissipation module dissipates heat for the charging and discharging device when the charging and discharging device is in a charging mode or a discharging mode.
In one embodiment, the heat dissipation module includes at least one heat dissipation fan for dissipating heat of the battery pack and at least one heat dissipation fan for dissipating heat of the charging module.
In one embodiment, the number of the mounting parts is 4, and the charge and discharge device may be simultaneously electrically connected to the 4 battery packs through the mounting parts.
In one embodiment, the 4 battery packs are connected in series in a discharge circuit, and the discharge voltage of the charging and discharging device is the sum of the output voltages of the 4 battery packs.
Compared with the prior art, the charging and discharging equipment has the function of detecting the service life of the battery pack. When the service life of the accessed battery pack is exhausted, the charging and discharging equipment can be identified, and a user is reminded to replace the battery pack, so that an invalid charging process and a low-efficiency discharging process are avoided.
FIG. 1 is a schematic structural view of a first preferred embodiment of the backpack power supply of the present invention;
FIG. 2 is a side view of the backpack power supply of FIG. 1;
FIG. 3 is a block circuit diagram of the backpack power supply of FIG. 1;
fig. 4 is a flow chart of a battery pack power failure detection procedure of the backpack power supply of the present invention.
FIG. 5 is a schematic structural view of a second preferred embodiment of the backpack power supply of the invention;
FIG. 6a is a circuit diagram of a first preferred embodiment of the battery pack and mobile power terminal arrangement;
FIG. 6b is a circuit diagram of the first preferred embodiment of the battery pack and mobile power terminal arrangement;
FIG. 7a is a circuit diagram of a first preferred embodiment of the battery pack and mobile power terminal arrangement;
FIG. 7b is a circuit diagram of the first preferred embodiment of the battery pack and mobile power terminal arrangement;
FIG. 8 is a block diagram of a preferred embodiment of the mounting location of the heat dissipation fan;
fig. 9 is a flow chart of fan control for the backpack power supply.
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.
Fig. 1-2 illustrate a backpack power supply 100 according to a first preferred embodiment of the present invention. The backpack power supply 100 houses a plurality of battery packs 102 for powering the power tool. The terms "upward," "downward," "above," "below," "right," "left," and the like indicate the orientation of the backpack power supply 100 when worn on the user's back. The battery pack 102 housed in the backpack power supply 100 can be worn on the back of the user while the operator operates the power tool.
The housing 108 is substantially a rectangular parallelepiped structure including: a contact surface 1081, the contact surface 1081 facing the user's back when the user is carrying the backpack power supply 100; the first surface 1082 is disposed opposite to the contact surface 1081, and an indicating device 112 is disposed above the first surface 1082 for reminding a user of a real-time operation status of the backpack power supply 100. The indicating means 112 also serves as an alarm module. And a mounting portion 114 for connecting the battery pack 102. In this embodiment, the number of the mounting portions 114 is 4, and 4 battery packs 102 can be connected thereto. The battery pack 102 is detachably engaged with the mounting portion 114. When the battery pack 102 is detached from the mounting portion 114, the battery pack 102 can be mounted to the first power tool to supply power to the first power tool. When the battery packs 102 are mounted to the mounting portion 114, the battery packs 102 are connected in series to form a high voltage to supply power to the second power tool. The number of the mounting portions 114 is N, and the voltage of one battery pack 102 is M, the operating voltage of the first electric tool is M, and the operating voltage of the second electric tool is N × M, that is, the operating voltage of the second electric tool is N times the operating voltage of the first electric tool.
It is contemplated that housing 108 may be configured in a square or other configuration based on various considerations.
When the charging wire 104 is connected to AC100V-240V, the backpack power supply 100 can charge the battery pack 102 contained in the backpack power supply 100, and the backpack power supply 100 is used as a charger; when all the battery packs 102 are connected at the same time, the charging cord 104 is not connected to AC100V-240V, and the output cable 106 is connected to the power tool, the backpack power supply 100 can provide power to the power tool, and the backpack power supply 100 is used as an arrester. Harness assembly 110 includes a bracket 1101 and a harness 1102 connected to bracket 1101. The bracket 1101 is detachably connected with the contact surface 1081 of the housing 108, so that on one hand, a user can directly carry the backpack power supply 100 on the body, and the backpack power supply 100 is used for charging the electric tool to drive the electric tool to work; alternatively, the harness assembly 110 may be removed from the backpack power supply 100 and the housing 108 may be directly connected to a power tool, such as a lawnmower, to power the power tool. The backpack power supply 100 with the harness assembly 110 removed is defined as a mobile power supply. The mobile power source is mounted to the harness assembly 110 to form the backpack power source 100.
In this embodiment, the indicator 112 is a set of LED lights. The LEDs 1-4 respectively indicate the running status of the connected battery pack 102, and the LED5 is used for reminding the user of the working mode, the charging mode or the discharging mode of the backpack power supply 100; the LED6 consists of 4 small LED lights to indicate the current power level of the backpack power supply 100 during the discharge process. Through different lighting colors and lighting frequencies, the user is reminded of different information.
In one embodiment of the present invention, the indicating device can also remind the user of the operation condition of the backpack power supply through an audio signal.
Fig. 5 shows a second preferred embodiment of the power supply. Backpack power supply 100 includes a mobile power source 120 and a harness assembly 110 (not shown). The mobile power source 120 is removably mounted with respect to the harness assembly 110. When the mobile power source 120 is mounted on the harness assembly 110, the mobile power source 120 can be used in a back-carrying manner. When the portable power source 120 is separated from the harness assembly 110, the portable power source may be directly mounted to a non-handheld power tool, such as a walk-behind mower, to drive the power tool into operation, or may be placed on the ground and connected to a handheld power tool, such as a lawnmower, an electric drill, via a cable to drive the power tool into operation. The mobile power supply 120 includes a housing 108, a battery pack 102 mounted to the housing 108, a charging cord 104, an output cable 106, and an indicator device 112. Housing 108 includes a top housing 1082 and a bottom housing 1081. The top housing and the bottom housing are oppositely disposed. The circuit board is disposed between the top housing 1082 and the bottom housing 1081. Each of the circuit modules as described above is disposed on a circuit board. The mounting portion is provided to the top case 1082. The bottom housing is used to support the mobile power source 120 relative to the ground when the mobile power source is placed on the ground. When the user is carrying the backpack power supply 100, the bottom housing faces the user's back. The top housing 1082 includes a mounting area and a manipulation area, which are two areas of the top housing that are separate from each other. The mounting portion is provided in the mounting area, and the pointing device 112 is provided in the operation area. The arrangement of the other components except the indicating device 112 is the same as that of the previous embodiment, and the description thereof is omitted. In this embodiment, the indicating device 112 includes N groups of indicator lights, and the number N of the groups of indicator lights is the same as the number of the mounting portions on the housing 108, so that each group of indicator lights can indicate the status of the battery pack on the corresponding mounting portion. Optionally, N is 4. The pointing device 112 includes a first set of pointing devices 1120, a second set of pointing devices 1122, a third set of pointing devices 1124, and a fourth set of pointing devices 1126. The insertion direction of the battery pack 102 into the mounting portion 114 is defined as a lateral direction, and the direction perpendicular to the lateral direction is defined as a longitudinal direction. The first set of indicating devices 1120 is laterally juxtaposed with the third set of indicating devices 1124. Second set of indicating devices 1122 is laterally juxtaposed with fourth set of indicating devices 1126. The first and second sets of indicating devices 1120, 1122 are longitudinally disposed one above the other. The third and fourth sets of indicating devices 1124, 1126 are vertically disposed. A first set of indicating devices 1120 indicates the status of the battery packs on the first mount, a second set of indicating devices 1122 indicates the status of the battery packs on the second mount, a third set of indicating devices 1124 indicates the status of the battery packs on the third mount, and a fourth set of indicating devices 1126 indicates the status of the battery packs on the fourth mount. The four groups of indicating devices are arranged together in a centralized manner, so that an operator can observe the states of the four battery packs at the same time.
Fig. 3 shows a block circuit diagram of a first preferred embodiment of the backpack power supply 100. This backpack power supply 100 has: four independent charging modules and a discharging module. Each charging module comprises a detection module. The detection circuit detects the state of the battery pack and transmits the detection result to the charging module so that the charging module can control the charging process. The four independent charging modules are respectively a first charging module, a second charging module, a third charging module and a fourth charging module. The four independent detection modules are respectively a first detection module, a second detection module, a third detection module and a fourth detection module. Each charging module is configured to contain a power supply circuit. The power supply circuit adjusts the voltage and the voltage output by the power supply circuit according to the state information of the battery pack transmitted by the detection module so as to charge the battery pack 102; an external communication circuit for performing external communication with the battery pack 102; internal communication circuitry for internal communication with other operational modules within the backpack power supply 100. Each path of charging module corresponds to a mounting portion 114. For example, when a certain installation part 114 is connected to a battery pack 102, the accessed battery pack 102 may be defined as a 20V battery pack 1, the charging module corresponding to the installation part 114 may be defined as a 20V charging module 1, and so on. 20V is only an example and other voltages are possible. When the battery pack 102 is electrically connected to the backpack power source 100 through the mounting portion 114, the backpack power source 100 can charge the accessed battery pack 102. In the present embodiment, the 4 20V charging modules are independent of each other and do not affect each other. The user can select to charge one battery pack or a plurality of battery packs according to actual needs.
The main control module controls the discharging process of the mobile power supply according to the signal transmitted by the detection module (the main control module is also called as a discharging module). An internal communication circuit for communicating with other operating modules within the backpack power supply 100; the external communication circuit is used for communicating with the electric tool.
The terminal design of the terminal of the battery pack 102 and the corresponding mounting portion of the portable power source will be described below with reference to fig. 6a to 7 b. In the illustrated embodiment, only the terminal structure of the battery pack that mates with one mounting portion is taken as an example for description, and the terminal structure of the other battery pack that mates with the mounting portion is referred to the illustrated structure.
Fig. 6a shows a first preferred embodiment of the battery pack and mobile power terminal arrangement. The characteristic of this embodiment lies in that the battery package has 6 terminals, and does not have the communication function, and a installation department of portable power source also includes 6 terminals correspondingly. Specifically, the battery pack comprises a battery pack power terminal group and a battery pack signal terminal group. The battery pack power terminal group comprises a battery pack positive terminal B + and a battery pack negative terminal B-. The battery pack signal terminal group comprises a battery pack type identification pole BS, a power supply output pole VCC, a battery pack state detection pole BH and a battery pack temperature identification pole T. The battery pack type identification pole BS is connected with the identification element. The identification element represents predefined parameter information of the battery pack, such as the capacity of the battery pack, the voltage of the battery pack, the allowable charging current of the battery pack and the like. And the power supply output electrode VCC is connected with the voltage stabilizing unit and outputs 5V voltage outwards. The battery pack state detection electrode BH is connected with a control module in the battery pack, the control module monitors the state of the battery cell and generates a signal BH representing the health state of the battery pack according to the state of the battery cell, and the control module outputs BH signals outwards through the battery pack state detection electrode BH. The battery pack temperature identification pole T is connected with the temperature sensor, the temperature sensor detects the temperature of the battery pack, and the temperature signal of the battery pack is output outwards through the battery pack temperature identification pole T. Corresponding to the terminal arrangement of the battery pack, each mounting portion 114 is provided with a mobile power supply terminal group and a mobile power supply signal terminal group which are electrically connected with the battery pack power supply terminal group and the battery pack signal terminal group. The power supply terminal group of the mobile power supply comprises a positive pole B + and a negative pole B-. The mobile power supply signal terminal group comprises a battery pack type identification pole BS, a power supply output pole VCC, a battery pack state detection pole BH and a battery pack temperature identification pole T. In this embodiment, the signals transmitted by the signal terminal group are all analog signals.
Fig. 6b shows a second preferred embodiment of the battery pack. The characteristics of this embodiment lie in that the battery package has 6 terminals, and has the communication function, and a corresponding installation department of portable power source also includes 6 terminals. In this embodiment, the terminal and circuit design of the battery pack can refer to the embodiment shown in fig. 6a, and the difference is that the control module in the battery pack of this embodiment further includes a communication unit. The communication unit can receive the digital signal from the external equipment and send the corresponding digital signal to the external equipment, thereby realizing the communication with the external equipment. The communication unit communicates with the external equipment through the battery pack type identification electrode BS. The battery pack type recognition pole BS optionally transmits information of the identification element or information provided by the communication unit to the outside. When the battery pack is successfully communicated with the external equipment, the external equipment has a communication function, and the battery pack is communicated with the external equipment through the battery pack type identification electrode BS to transmit information. The information communicated by the communication includes but is not limited to: predefined parameters of the battery pack, such as the capacity of the battery pack, the voltage of the battery pack, the allowable charging current of the battery pack, and the like; and the real-time operation parameters of the battery pack, such as the current single-section voltage, the temperature, the charging current, the discharging current, the health state and the like of the battery pack. When the communication between the battery pack and the external equipment is unsuccessful, the external equipment has no communication function, and the battery pack transmits the information of the identification element to the external equipment through the battery pack type identification electrode BS. The identification element represents predefined parameter information of the battery pack, such as the capacity of the battery pack, the voltage of the battery pack, the allowable charging current of the battery pack and the like. The terminal arrangement of the mobile power supply is unchanged from the embodiment shown in fig. 6a, considering that the number and type of terminals provided for the battery pack are not changed.
Fig. 7a shows a third preferred embodiment of the battery pack terminal. The battery pack has 4 terminals and no communication function, and accordingly one mounting portion of the mobile power supply also comprises 4 terminals. Specifically, the battery pack comprises a battery pack power terminal group and a battery pack signal terminal group. The battery pack power terminal group comprises a battery pack positive terminal B + and a battery pack negative terminal B-. The battery pack signal terminal group comprises a battery pack type identification pole BS and a T/V pole. The arrangement of the battery pack type identifier BS is the same as that of the previous embodiment, and is not described herein. The T/V pole is connected with a temperature sensor, the temperature sensor is connected with the negative terminal B of the battery pack through an electronic switch, and the electronic switch is controlled by the control module to be selectively in a closed state or an open state. When the electronic switch is in a closed state, the T/V pole transmits a signal of the temperature sensor outwards, namely a real-time temperature signal of the battery pack. When the electronic switch is in an off state, the T/V pole transmits a signal with infinite resistance outwards, namely an analog low-temperature signal. The control module detects the state of the battery pack, controls the electronic switch to be in a closed state when the state of the battery pack is normal, namely the battery pack is healthy, and controls the electronic switch to be in an open state when the state of the battery pack is abnormal, namely the battery pack is unhealthy. Therefore, the T/V pole can acquire the temperature information of the battery pack and can also multiplex the signal of the health state of the battery pack. Corresponding to the terminal arrangement of the battery pack, each mounting portion 114 is provided with a mobile power supply terminal group and a mobile power supply signal terminal group which are electrically connected with the battery pack power supply terminal group and the battery pack signal terminal group. The power supply terminal group of the mobile power supply comprises a positive pole B + and a negative pole B-. The mobile power supply signal terminal group comprises a battery pack type identification pole BS and a T/V pole. In this embodiment, the signals transmitted by the signal terminal group are all analog signals.
Fig. 7b shows a fourth preferred embodiment of the battery pack terminal. The battery pack has 4 terminals and a communication function, and accordingly one mounting portion of the mobile power supply also comprises 4 terminals. The difference from the embodiment shown in fig. 7a is that the control module in the battery pack of this embodiment further includes a communication unit. The communication unit can receive the digital signal from the external equipment and send the corresponding digital signal to the external equipment, thereby realizing the communication with the external equipment. The communication unit communicates with the external equipment through the battery pack type identification electrode BS. The battery pack type recognition pole BS optionally transmits information of the identification element or information provided by the communication unit to the outside. When the battery pack is successfully communicated with the external equipment, the external equipment has a communication function, and the battery pack is communicated with the external equipment through the battery pack type identification electrode BS to transmit information. When the communication between the battery pack and the external equipment is unsuccessful, the external equipment has no communication function, and the battery pack transmits the information of the identification element to the external equipment through the battery pack type identification electrode BS. The terminal arrangement of the mobile power supply is unchanged from the embodiment shown in fig. 7a, considering that the number and type of terminals provided for the battery pack are not changed.
As shown in fig. 3, the power output port connected to the main control module includes 4 terminals, which are respectively: an output voltage anode B +, an output voltage cathode B-, a data port D and a protection port CS. The function of the individual discharge interfaces will be referred to in the following description of the discharge process.
According to the above description, the first terminal set of the portable power source disposed on the mounting portion is different from the second terminal set disposed on the power output interface. In the embodiment shown in fig. 6a and 6b, the first terminal set provided to the mounting portion differs in function and number from the second terminal set provided to the power output interface. In the embodiment shown in fig. 7a and 7b, the first terminal set provided to the mounting portion is functionally different from the second terminal set provided to the power output interface. Specifically, the first terminal set includes a first mounting signal terminal, such as a battery pack type identifier BS, which alternatively receives an analog signal or a digital signal transmitted by the battery pack. And when the installed battery pack is a communication battery pack, receiving a digital signal of communication. And when the installed battery pack is a battery pack without a communication function, receiving an analog signal. Wherein the analog signal characterizes an intrinsic parameter of the battery pack, such as a signal expressed by an identification element. The digital signal characterizes an intrinsic or current operating parameter of the battery pack, such as a signal communicated by a communication. The second terminal set includes a first output port signal terminal, such as data port D. The first output port signal terminal outputs digital signals to represent the current operation parameters of the mobile power supply. The first terminal group further includes a second mount signal terminal, such as a pack state detection pole BH, a pack temperature recognition pole T, or a T/V pole. And the second mounting part signal terminal receives an analog signal transmitted by the battery pack, and the analog signal represents the current operating parameters of the battery pack. The second terminal set also includes a second outlet signal terminal, such as a protection port CS. And the second output port signal terminal outputs an analog signal to represent the current operation parameters of the mobile power supply. The information represented by the digital signal output by the first output port signal terminal is at least partially overlapped with the information represented by the analog signal output by the second output port signal terminal. From the foregoing, the backpack power supply has a charging mode and a discharging mode. The operation of the backpack power supply 100 in the charging and discharging modes will be described in detail below. Consider that the mobile power source 120 differs from the backpack power source 100 only in whether or not there is a backpack assembly. The charging mode and the discharging mode of the backpack power source 100 are the charging mode and the discharging mode of the mobile power source 120.
Charging mode
When the charging cord 104 is connected to AC100V-240V and no power tool is connected, the backpack power supply 100 enters a detection module running state. The user may connect a single or a plurality of battery packs 102 to the mounting part 114 as needed to charge them. The battery pack 102 of this embodiment is a 20V lithium battery pack, and the terminal settings of the battery pack and backpack power supply refer to the settings of fig. 6a and 6 b. In other embodiments, the battery pack 102 may be at other voltages, and the terminal arrangement of the battery pack 102 and backpack power supply 100 may also refer to the arrangement of fig. 7a and 7 b.
For clarity, the following description will take the 20V battery pack 1 (i.e., the first battery pack) accessed by the detection module 1 (i.e., the first detection module) and corresponding thereto as an example.
First, the detection module 1 will determine whether the 20V battery pack 1 is correctly accessed. Specifically, the battery pack type identification pole BS identifies the resistance value of the accessed object, and if the resistance value meets the resistance value of the standard battery pack, for example: 18K-84K, the detection module 1 determines that the 20V battery pack 1 is correctly accessed. Otherwise, judging that the 20V battery pack 1 is not correctly accessed; the process of identifying whether the battery pack 102 is properly accessed may be performed periodically throughout the charging process.
After confirming that the 20V battery pack 1 is correctly accessed, the detection module 1 sends a handshake signal to the 20V battery pack 1 through the battery pack type identification pole BS; if the accessed 20V battery pack 1 has a communication function, the 20V battery pack 1 with the communication function transmits a feedback signal to the detection module 1; so far, the communication handshake between the detection module 1 and the 20V battery pack 1 is successful, and the detection module can perform external communication with the 20V battery pack 1 through the battery pack type identification electrode BS to acquire information of the 20V battery pack 1, including the battery pack voltage U, the battery pack temperature T, and the like.
It should be noted that once the communication handshake between the detection module 1 and the 20V battery pack 1 is successful, the detection module 1 may determine whether the 20V battery pack 1 is correctly accessed by performing an external communication with the 20V battery pack 1. That is, at this time, the detection module 1 determines whether the 20V battery pack 1 is correctly accessed by the method that the battery pack type identification pole BS does not identify the resistance value of the accessed object.
If the accessed 20V battery pack 1 does not have the communication function, the 20V battery pack 1 cannot transmit a feedback signal to the detection module 1 based on the handshake signal. At this time, the detection module 1 may obtain information of the 20V battery pack 1 through other interfaces, for example, obtain temperature information of the battery pack through the battery pack temperature identification pole T, obtain voltage information of the battery pack through the positive pole B + and the negative pole B-.
The detection module judges whether the battery pack is correctly accessed through the charging interface, acquires information of the battery pack and the like, and belongs to external communication between the backpack power supply 100 and the battery pack 102.
Based on different battery pack information, the charging module 1 (i.e. the first charging module) will perform different charging operations. Specifically, after the detection module 1 judges that the battery pack is correctly accessed, the charging module 1 provides a voltage of 5V for the power output electrode VCC, and is used for supplying power to a single overcharge circuit in the 20V battery pack 1; the single-section overcharging circuit monitors the voltage of a single-section battery core in the 20V battery pack 1 in real time; once the voltage of a single cell exceeds the preset charging voltage of the battery pack, the 20V battery pack 1 controls a BH interface to output a low level; when the detection module 1 detects that the BH interface is at the low level, the charging module 1 stops charging the 20V battery pack 1. When the voltage of the 20V battery pack 1 is detected to be between 10V +/-0.5V and 13V +/-0.5V, the charging module 1 enters a trickle charging state, and the charging current is 300mA +/-100 mA; when the voltage of the battery pack is detected to be between 13V +/-0.5V and 20V +/-0.5V, the charging module 1 enters a constant-current charging state, and the charging current is 4.0A +/-0.2A; when the voltage of the battery pack is detected to be between 20V +/-0.5V and 20.75V +/-0.125V, the charging module 1 enters a constant-voltage charging state, the charging current is reduced accordingly, and the charging process is continued.
It is conceivable that what state of charging the charging module 1 performs, such as trickle charging or constant current charging, and corresponding charging currents in different charging states may be set.
The indicating device 112 may present different content corresponding to different states during the charging process. For example, when the charging cord 104 of the backpack power supply 100 is connected to an AC100-240V input, the 20V battery pack 1 is connected to a corresponding mounting, the LED1 is off; when the detection module 1 detects that the voltage of the 20V battery pack 1 is lower than 10V +/-0.5V, the LED1 is in a red normally-on state; when the trickle charge time is longer than 30min and the voltage of the 20V battery pack 1 is still less than 13V +/-0.5V, the detection module 1 stops charging the battery pack 1, and the LED1 is in a red normally-bright state; when the detection module 1 is in trickle charge, constant current, constant voltage charge, the LED1 displays green and flashes at a frequency of 1 HZ; when the detection module 1 detects that the temperature of the 20V battery pack 1 is higher than 45 +/-2 ℃, the detection module 1 stops charging the battery pack 1, the LED1 is in a red flashing state, and the charging of the 20V battery pack 1 is recovered when the temperature of the battery pack is recovered to be lower than 42 +/-2 ℃; when the detection module 1 detects that the temperature of the 20V battery pack 1 is lower than 2 +/-2 ℃, the detection module 1 stops charging the 20V battery pack 1, and the charging of the 20V battery pack 1 is recovered when the temperature is higher than 5 +/-2 ℃; when the working current of the detection module 1 is less than 400mA +/-100 mA and the voltage of the 20V battery pack 1 is greater than 20V, the LED1 is in a green normally-on state, and the charging process continues; when the working current of the detection module 1 is less than 200mA +/-100 mA and the voltage of the 20V battery pack 1 is greater than 20V, the charging module stops charging the battery pack, and the LED is in a green normally-on state; when the detection module 1 detects that the maximum charging time is longer than 720min (no trickle charge), the charging module 1 stops charging the 20V battery pack 1, and the LED is in a green normally-on state.
This embodiment is merely illustrative of one form of illumination of the LED1 in response to different operating conditions of the battery pack 102. It is contemplated that the lighting frequency and the lighting color of the LED1 may be designed in other forms as long as the different operation states of the 20V battery pack 1 can be reflected by the LED1 to be known by the user.
The backpack power supply 100 has and can only be in one mode of operation for safety and life reasons. During operation of the detection module, the detection module is locked and the discharge function is disabled. The discharge output cable 106 at this time has no output. The detection module can be unlocked only when the charging cord 104 is disconnected from the AC 100-240V.
In order to ensure the smooth charging process and the protection of the backpack power supply 100, a plurality of protection modules including short-circuit protection, overcurrent protection, reverse leakage current, etc. are integrated on the control board of the backpack power supply 100. This part of the protection module is conventional technology in the field of backpack power supplies and is not described herein again.
Discharge mode
When the four 20V battery packs 102 are all properly connected, the output cable 106 is connected to the power tool, and no AC100-240V is input through the charging cord 104, the backpack power supply 100 enters the master control module operating state. Since the 4 20V battery packs 102 are connected in series in the discharge circuit, the discharge voltage is the sum of the output voltages of the 4 20V battery packs, i.e., 80V.
Firstly, a switch of the electric tool is pressed, the electric tool releases a signal to the main control module through a discharge interface, namely a data port D or a protection port CS, and a discharge chip is activated;
in the present embodiment, the power supply to the discharge chip is obtained by rectifying the discharge voltage 80V. Of course, in other embodiments, one or more of the 4 battery packs may be selected to supply power to the discharge chip.
Then the main control module activates the internal communication circuit of the 4-path detection module, communicates with the internal communication circuit and indicates the internal communication circuit to acquire the related information of the corresponding battery pack; after receiving the instruction of the main control module, the detection module acquires the information of the battery pack in an external communication mode, and the detection module comprises: whether the battery pack is correctly accessed, the voltage of the battery pack, the temperature of the battery pack and the like are transmitted to the main control module; after receiving the relevant information of the battery pack, the main control module compares the information with the corresponding preset value and controls the level output of the protection port CS according to the comparison result. Once the acquired battery pack information exceeds a preset value, the main control module controls the protection port CS to output a low level and transmits a low level signal of the protection port CS to the electric tool in an external communication mode; when the power tool receives the low level signal, the power supply of the backpack power supply 100 is cut off or the power tool stops operating. For example, when the acquired temperature of a certain battery pack 102 is greater than a preset temperature value, the protection port CS outputs a low level; this low level signal is transmitted to the power tool through external communication between the main control module and the power tool, and eventually causes the discharge circuit of the backpack power supply 100 to provide power to the power tool to be disconnected.
Notably, the ability of different power tools to withstand the discharge current of the backpack power supply 100 is not the same. For this purpose, the main control module transmits the maximum discharge current of the backpack power supply 100 to the power tool through the data port D in advance, so that the power tool adjusts itself based on the maximum discharge current value, for example, sets a current protection point. The maximum discharge current of the backpack power supply 100 is defined as: if the minimum value of the maximum discharge current of the 4 battery packs 102 is less than 39.5A + -0.5, the maximum discharge current of the backpack power supply 100 is equal to the minimum value; if the minimum value of the maximum discharge current of the 4 battery packs 102 is greater than or equal to 39.5A + -0.5, the maximum discharge current of the backpack power supply 100 is 39.5A + -0.5.
As mentioned above, in order to ensure the smooth discharging process, the main control module controls the level output of the protection port CS based on the real-time information of the battery pack 102. Once the protection port CS outputs a low level, it will trigger the backpack power supply 100 to open the discharge circuit to the power tool or the power tool to stop working. The backpack power supply 100 in this embodiment is also provided with a second protection. Specifically, the information of each battery pack 102 acquired by the main control module, including the battery pack voltage, the battery pack temperature, and the like, is transmitted to the electric tool through the data port D; after receiving the battery pack information, the electric tool judges whether the discharging condition is met or not based on the self judgment reference; if the real-time status of the battery pack 102 does not satisfy the discharge condition, the power tool stops receiving the power supply of the backpack power supply 100. Therefore, even if a failure occurs during the control of the protection port CS output by the main control module, the determination of whether to receive the discharge of the backpack power supply 100 can be made by the electric power tool itself based on the real-time information of each battery pack 102. The whole discharging process is more reliable.
Similar to the charging mode, the main control module is locked and the function of the detection module is forbidden during the operation process of the main control module. The locking of the master control module can be released only after the power tool is disconnected from the backpack power supply 100.
Battery pack power failure detection
For a discharge device in which a plurality of battery packs are connected in series, as long as one battery pack is exhausted in life, the overall discharge capacity becomes weak, i.e., the so-called bucket effect. If the battery pack with the service life failure can be screened out in advance, the battery pack is removed, and the bucket effect of an invalid charging process and a subsequent discharging process is not needed.
For this reason, the backpack power supply 100 of the present embodiment is further provided with a battery pack power exhaustion detection program. The logic for operating the detection program will be described in detail below with reference to fig. 4.
First, the detection module communicates with the accessed battery pack 102 through the battery pack type identification electrode BS to determine whether the battery pack 102 has a communication function.
If the accessed battery pack 102 is identified to have a communication function, the battery pack is called a new battery pack. The detection module can further acquire information such as theoretical total capacity, current total capacity and the like of the battery pack 102 through the battery pack type identification pole BS; based on the theoretical total capacity of the battery pack 102, the detection module sets a corresponding reference value, for example, 60% of the theoretical total capacity is set as a reference value 2, and 80% of the theoretical total capacity is set as a reference value 1. The reference value 1 is larger than the reference value 2; if the current total capacity of the battery pack 102 is smaller than the reference value 2, judging that the battery pack 102 is in secondary electric quantity failure, reminding a user to stop the charging process corresponding to the LED lamp, and replacing the battery pack 102; if the current total capacity of the battery pack 102 is between the reference value 2 and the reference value 1, the battery pack 102 is judged to be in first-level power failure, and the LED lamp reminds the user of suggesting replacement.
In an embodiment of the present invention, the main control module may set a reference value based on the theoretical total capacity; comparing the number of charge-discharge cycles of the battery pack 102, which is obtained through the battery pack type identification pole BS, with the reference value; if the cycle number is larger than the reference value, the electric quantity of the battery pack is judged to be exhausted, and the LED lamp is used for reminding a user to replace the battery pack.
If the accessed battery pack 102 is identified as not having communication function, it is called an old battery pack. The detection module still obtains information such as the theoretical total capacity of the battery pack 102 through the battery pack type identification pole BS, and sets the reference value 1 and the reference value 2 based on the theoretical total capacity. In contrast, when the accessed battery pack 102 does not have the communication function, the battery pack type identifier BS cannot acquire the current total capacity of the battery pack 102. To this end, the current total capacity of the battery pack 102 may be estimated during charging according to an SOC estimation algorithm; and comparing the current total capacity with a reference value, and executing corresponding instructions according to different comparison results.
In one embodiment of the present invention, the detection module may record the charging time used in a certain voltage interval during the charging process, and the charging time is positively correlated to the current total capacity of the battery pack 102; correspondingly, the main control module sets a reference value positively correlated with the charging time according to the acquired information such as the battery cell type, the theoretical total capacity of the battery pack and the like; and comparing the recorded charging time with the reference value, if the charging time is shorter than the reference value, judging that the electric quantity of the battery pack is exhausted, and reminding a user of replacing the current battery pack 102 by an LED lamp.
The backpack power supply 100 of the present embodiment, the power failure detection procedure may occur at any time during the charging process after determining that the battery pack 102 has been properly connected. Of course, if the battery pack 102 is equipped with a communication function, the detection module can directly obtain the current total capacity of the battery pack 102 through the battery pack type identifier BS. In this case, the power failure detection procedure may occur before the battery pack 102 is actually charged; if the battery pack 102 does not have a communication function, the current total capacity thereof cannot be directly obtained. In this case, the power exhaustion process can only occur during the charging process of the battery pack 102.
In an embodiment of the present invention, when the accessed battery pack 102 is in the communication function, the power exhaustion detection may also occur in the operation state of the main control module. As described above, the main control module activates the internal communication circuits of the 4 detection modules and instructs the main control module to acquire the related information of the corresponding battery pack 102, including: the theoretical total capacity of the battery pack 102, the current total capacity of the battery pack, etc.; the detection module transmits the information of the battery pack 102 to the main control module in an internal communication mode; similar to the determination of whether the electric quantity of the battery pack is exhausted by the detection module in the charging process, the main control module respectively sets a reference value 1 and a reference value 2 based on the theoretical total capacity of each path of battery pack 102, wherein the reference value 2 is smaller than the reference value 1, and compares the obtained current total capacity of the battery pack with the reference value 1 and the reference value 2; if the current total capacity of the battery pack 102 is smaller than the reference value 2, it indicates that the electric quantity of the accessed battery pack 102 is exhausted, and the LED lamp is used for reminding the user to replace.
In one embodiment of the present invention, the information about the battery pack that can be obtained by the detection module includes a total discharge time of the battery pack. After receiving the total discharge time of the battery pack transmitted by the detection module, the main control module compares the value with a set discharge time reference; once the total discharge time of the battery pack is less than the reference value, it indicates that the electric quantity of the accessed battery pack 102 is exhausted, and the corresponding LED lamp reminds the user of replacement.
Therefore, the backpack power supply 100 of the present invention can detect the power failure of the accessed battery pack 102 regardless of whether the battery pack is provided with a communication function or not.
Heat radiation module
During operation of the backpack power supply 100 of this embodiment, the battery pack 102 and the power circuit of the detection module generate a large amount of heat. The influence of high temperature on the normal operation of the backpack power supply 100 is disadvantageous, and the discharging efficiency is reduced due to the temperature rise of the battery pack 102 no matter after the charging is finished; after the discharging is finished, the battery pack 102 must be cooled to a certain value to be recharged. To this end, the backpack power supply 100 is also provided with a heat sink module. In this embodiment, the heat dissipation module includes a fan set a and a fan set b. The fan group a comprises 4 independent heat dissipation fans a1-a4, and the heat dissipation fans are used for respectively dissipating heat of 4 20V battery packs 102; for example, fan a1 dissipates heat for 20V battery pack 1, fan a2 dissipates heat for 20V battery pack 2, and so on. The fan group b includes 4 independent heat dissipation fans b1-b4 for respectively dissipating heat of the power circuits in the 4 charging modules, for example, the fan b1 dissipates heat of the power circuit in the charging module 1, the fan b2 dissipates heat of the power circuit in the charging module 2, and so on.
The following describes the operation process of the heat dissipation module in the charging mode by taking the 20V battery pack 1 and the detection module 1 as an example.
During charging, both the battery pack 102 and the power circuit have heat dissipation requirements. For this purpose, the charging module 1 comprises a power supply circuit 1 for supplying power to the fan a1 and a power supply circuit 2 for supplying power to the fan b 1. When the detection module 1 detects that the temperature of the 20V battery pack 1 is higher than the critical heat dissipation point, the switch in the power supply circuit 1 is closed, and the fan a1 rotates. When the power supply circuit of the charging module 1 starts operating and the 20V battery pack 1 is charged, the switch in the power supply circuit 2 is closed and the fan b1 is rotated.
Similar to the charging module 1, the charging module 2 (or 3, or 4) is provided with a power supply circuit for supplying power to the fan a2 (or a3 or a3) and a power supply circuit for supplying power to the cooling fan b2 (or b3 or b4), respectively. Once a certain path of detection module detects that the temperature of the corresponding battery pack 102 exceeds a critical heat dissipation point, the switch of the corresponding power supply circuit is closed, and the corresponding heat dissipation fan rotates; once the power circuit of a certain path of charging module starts to work, the switch of the corresponding power supply circuit is closed, and the corresponding cooling fan rotates.
In an embodiment of the present invention, only 2 heat dissipation fans may be provided to meet the heat dissipation requirement of the battery pack. The fan a1 dissipates heat from the 20V battery pack 1 and the 20V battery pack 2, and the fan a2 dissipates heat from the 20V battery pack 3 and the 20V battery pack 4. At this time, the power supply circuit that supplies power to the cooling fan a1 is set to: as long as the temperature of one of the 20V battery packs 1 and 2 is higher than the critical heat dissipation point, the switch of the power supply circuit is closed, and the heat dissipation fan a1 is rotated. Similarly, the power supply circuit for supplying power to the cooling fan a2 is configured to: as long as the temperature of one of the 20V battery packs 3 and 4 is higher than the critical heat dissipation point, the switch of the power supply circuit is closed, and the heat dissipation fan a2 is rotated.
In an embodiment of the present invention, only 2 cooling fans may be provided for the cooling requirement of the power circuit in the charging module. The fan B1 dissipates heat between the power circuit of the charging module 1 (the first charging module) and the power circuit of the charging module 2 (the second charging module), and the fan B2 dissipates heat between the power circuit of the charging module 3 (the third charging module) and the power circuit of the charging module 4 (the fourth charging module). At this time, the power supply circuit that supplies power to the cooling fan B1 is set to: as soon as one of the power supply circuit of the charging module 1 and the power supply circuit of the charging module 2 starts operating, the switch of the power supply circuit is closed, and the cooling fan B1 rotates. Similarly, the power supply circuit for supplying power to the cooling fan B2 is configured to: as soon as one of the power supply circuit of the charging module 3 and the power supply circuit of the charging module 4 starts operating, the switch of the power supply circuit is closed and the cooling fan B2 rotates.
In an embodiment of the present invention, the number of fans for dissipating heat from the battery pack may be other numbers as long as: when the temperature of the battery pack in a certain path is detected to be higher than the critical heat dissipation point, the fan for dissipating heat can rotate.
In one embodiment of the present invention, the number of fans for dissipating heat from the power supply circuit may be other numbers as long as: when the power supply circuit of a certain detection module starts to work, the fan for radiating the power supply circuit can rotate.
In the charging mode, the power supply voltage of the power supply circuit for dissipating heat from the battery pack 102 and the power supply voltage of the power supply circuit for dissipating heat from the power supply circuit are obtained by rectifying AC100 to 240V.
During discharge, only the battery pack 102 needs to dissipate heat. At this time, the heat dissipation fan a1-a4 is still powered by the power supply circuit provided in the charging module. As described above, the main control module activates the internal communication circuits of the 4 detection modules and instructs the main control module to acquire information corresponding to the battery pack 102, including the temperature of the battery pack. Once the temperature of the battery pack 102 is detected to be higher than the critical heat dissipation point, the power supply circuit corresponding to the charging module starts to operate, and the heat dissipation fan rotates to dissipate heat for the battery pack.
In the discharge mode, the power supply voltage of the power supply circuit that dissipates heat from the battery pack 102 is obtained by rectifying the discharge voltage 80V.
The present invention also provides an embodiment of a heat dissipation module as shown in fig. 8. Fig. 8 is a bottom view of the portable power source with the bottom cover and the circuit board removed. As shown in fig. 8, the backpack power supply 100 includes a heat dissipation fan that only dissipates heat from the battery pack and not from the circuit board. In order to reduce the volume and the weight of the backpack power supply as much as possible, a plurality of battery packs share one heat dissipation fan, so that the number of the heat dissipation fans is less than that of the battery packs, namely the number of the mounting parts. In this embodiment, the number of the mounting portions is 4, and the number of the heat radiation fans is 2. As shown in fig. 8, the heat dissipation fan includes a first heat dissipation fan 1200, and the first heat dissipation fan 1200 is located between the first mounting portion 1020 and the second battery pack mounting portion 1022. The mobile power supply 120 further includes an air duct. The air duct includes a first air duct 1206. The first duct 1206 guides the airflow of the first heat dissipation fan to the first battery pack mounting portion 1020 and the second battery pack mounting portion 1022. The heat dissipation fan further comprises a second heat dissipation fan 1202, and the air channel comprises a second air channel 1208. The second duct 1206 guides the airflow of the second heat dissipation fan 1202 to the third and fourth battery pack mounting portions 1024 and 1026. Considering that the heat dissipation fan only dissipates heat to the battery pack and does not dissipate heat to the circuit board, the heat dissipation fan is located between the circuit board and the top shell and close to the battery pack mounting portion.
The invention also provides a starting process of the cooling fan as shown in fig. 9. It should be noted that the process is suitable for controlling all the heat dissipation fans. When a part of the heat radiation fans meet the following starting conditions, the part of the heat radiation fans are controlled to be started, and the rest of the heat radiation fans are kept not to be started until the starting conditions are met.
After the main control module is initialized, step S0 is performed to detect whether the battery pack is connected to the mobile power supply. The access detection method refers to the description of the foregoing embodiments.
After the main control module is initialized, the process proceeds to step S1, and it is detected whether the portable power source is in the discharging mode. When the mobile power supply is in the discharging mode, the mobile power supply discharges outwards. The circuit board includes a tool detection module. The tool detection module detects whether the power output port provides power to the second power tool. Specifically, whether the mobile power supply discharges outwards is judged through whether the CS interface receives a signal that the electric tool starting button is triggered. When the power tool is connected to the mobile power supply, but the starting button is not pressed to trigger the power tool to start working, the mobile power supply is not considered to be in the discharging mode. Only when the power tool is connected to the mobile power supply and the main control module detects that the start button of the power tool is triggered, the main control module considers that the mobile power supply is in the discharging mode. If yes, the process proceeds to step S16, where the cooling fan is controlled to maintain the stopped state. If the determination result is negative, the process proceeds to step S2.
In step S2, it is detected whether the mobile power supply is in the charging mode. When the main control module detects that the mobile power supply is connected with the external power supply, the mobile power supply is considered to be in a charging mode. The circuit board further comprises a power supply detection module, and the power supply detection module detects whether an external power supply is input into the electric energy input port. In the charging mode, at least the following situations are included, namely, 1) the mobile power supply is connected with an external power supply, but no battery pack is charged due to the fact that no battery pack is connected; 2) the mobile power supply is connected with an external power supply, but the temperature of the accessed battery pack is too high, so that the battery pack cannot be charged; 3) the mobile power supply is connected with an external power supply, but the battery pack cannot be charged due to the situations of over-low voltage, over-low temperature, electric quantity attenuation, failure and the like of the accessed battery pack; (ii) a 4) The mobile power supply is connected with an external power supply, any battery pack meets the charging condition, and charging of the battery pack is started. If the determination result is yes, the process proceeds to step S4. If not, the process proceeds to step S16, where the cooling fan is controlled to maintain the stopped state.
In step S4, it is detected whether the battery pack satisfies the charging condition. The condition of meeting the charging condition comprises at least one of the conditions that the voltage of the whole battery pack is within a preset range, the voltage of a single section of the battery pack is within a preset range, the temperature of the battery pack is within a preset range, or the capacity of the battery pack is within a preset range. When the charging condition is satisfied, the flow proceeds to step S14, and charging is started. When the charging condition is not satisfied, the flow proceeds to step S6.
In step S6, it is detected whether the temperature of the battery pack is too high. The excessive temperature means that the temperature of the battery pack exceeds a preset temperature. And when the judgment result is yes, the temperature of the battery pack is over high, and the battery pack cannot be charged. The battery pack is now in a state of waiting for charging. In order to reduce the waiting time, it is necessary to cause the battery pack to cool down as soon as possible, so that the process proceeds to step S8 to activate the heat dissipation fan for heat dissipation as soon as possible. If the determination result is no, it indicates that the battery pack does not satisfy the charging condition and is not caused by an excessively high temperature of the battery pack, and it is not necessary to activate the heat dissipation fan to dissipate heat at this time, so the process proceeds to step S16.
In step S8, it is detected whether the temperature of the battery pack returns to normal. If the temperature of the battery pack returns to normal, that is, the temperature returns to the preset temperature range, the battery pack can be charged, so the process goes to step S14 to start charging the battery pack. If the temperature of the battery pack is not recovered to normal, that is, the temperature of the battery pack is not recovered to the preset temperature range, it indicates that the battery pack is still in a high temperature state, and the heat dissipation fan needs to be started to dissipate heat as soon as possible, so the process goes to step S10 to control the heat dissipation fan to start rotating.
Step S10 is followed by step S12. In step S12, the rotation speed of the heat dissipation fan is controlled according to the temperature of the battery pack. Optionally, the higher the temperature of the battery pack is, the higher the rotation speed of the heat dissipation fan is controlled by the circuit board.
After step S12 and step S16, the process returns to step S0 to start new loop detection and judgment.
Communication module
The backpack power supply 100 of the present embodiment includes three sets of communication, i.e., external communication between the battery pack 102 and the backpack power supply 100, internal communication between the working modules in the backpack power supply 100, and external communication between the backpack power supply 100 and the electric power tool, according to different communication targets.
As mentioned above, the external communication between the battery pack 102 and the backpack power source 100 is realized through the charging interface, and mainly completes: the determination of whether the battery pack 102 is correctly accessed, the acquisition of the related information of the battery pack 102, and the like.
The internal communication between the various operating modules within the backpack power supply 100 includes communication between the detection module and the master control module. This communication is mainly accomplished: and instructing the detection module to acquire the information of the battery pack 102, and transmitting the information of the battery pack 102 acquired by the detection module to the main control module. Information on the battery packs 102, such as the battery pack temperature, the battery pack voltage, and the like, is reflected by the electric signals, but the 4 battery packs 102 are connected in series in the circuit and are not connected to the common ground. Therefore, the information of each battery pack 102 acquired by the detection module needs to be transmitted to the main control module in an isolated communication manner.
The external communication between the backpack power supply 100 and the electric tool is realized through a discharging interface, and mainly completes: whether the electric tool receives the discharge is controlled, and the information of the battery pack 102 is transmitted to the electric tool and the like.
Embodiments of the present disclosure have been described above, and the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (14)
- A mobile power supply, characterized in that the mobile power supply comprises:the battery pack comprises at least two battery packs, a first power tool and a second power tool, wherein the battery packs are detachably connected with the first power tool and supply power to the first power tool;a housing having at least two mounting portions detachably connected to the battery pack;the electric energy output port is electrically connected with the mounting part, detachably connected with the second electric tool and used for supplying power to the second electric tool;the circuit board is connected with the at least two battery packs in series and transmits the electric energy of the battery packs connected in series to the electric energy output port;alarm module, work as the battery package install in during the installation department, the circuit board is right the battery package carries out electric quantity exhaustion and detects, when discovering the battery package of electric quantity exhaustion, through alarm module reminds the user to change the battery package.
- The mobile power supply according to claim 1, wherein the mounting portion is provided with a battery pack type identification pole BS, the battery pack type identification pole BS is connected with an identification element, the circuit board determines whether the battery pack is correctly accessed by identifying data of the identification element, when the circuit board determines that the battery pack is correctly accessed, data related to total capacity and data related to current capacity of the battery pack are obtained, and whether the battery pack is depleted is determined according to the data related to total capacity and the data related to current capacity.
- The portable power supply according to claim 2, wherein the circuit board communicates with the battery pack through the battery pack type identification electrode, the data related to the total capacity and the data related to the current capacity are communicated if the communication is successful, and the data related to the total capacity is acquired by identifying the data of the identification element if the communication is not successful.
- The mobile power supply of claim 3, wherein the circuit board obtains a theoretical total capacity and a current total capacity of the battery pack through communication, and compares the theoretical total capacity with the current total capacity to determine whether the battery pack is depleted.
- The mobile power supply of claim 3, wherein the circuit board obtains a theoretical total capacity and a total discharge time of the battery pack through communication, sets a reference value according to the theoretical total capacity, and compares the total discharge time with the set reference value to determine whether the battery pack is depleted.
- The mobile power supply of claim 3, wherein the circuit board obtains a theoretical total capacity of the battery pack by recognizing data of the identification element, estimates a current total capacity of the battery pack according to an SOC algorithm, and determines whether the battery pack is depleted according to the theoretical total capacity and the current total capacity.
- The mobile power supply of claim 3, wherein the circuit board obtains a theoretical total capacity of the battery pack by recognizing data of the identification element, sets a reference value according to the theoretical total capacity, records a charging time used in a voltage interval during charging, and judges whether the battery pack is depleted according to the charging time and the reference value.
- The mobile power supply of claim 4, wherein the circuit board determines whether the battery pack is depleted before the circuit board charges the battery pack.
- The mobile power supply of claim 5, wherein the circuit board determines whether the battery pack has depleted power before the circuit board discharges the battery pack.
- The mobile power supply of claim 7, wherein the circuit board determines whether the battery pack is depleted occurs during the process of the circuit board charging the battery pack.
- The mobile power supply of claim 1, wherein the mobile power supply is provided with a strap assembly that is removably connected with the housing.
- The mobile power supply of claim 1, wherein the mobile power supply further comprises a power input port that is removably coupled to an external power source, the circuit board converting the external power source to a power source suitable for charging the battery pack to charge the battery pack.
- The portable power supply of claim 12, wherein the portable power supply comprises at least one heat dissipation fan for dissipating heat of the battery pack, the circuit board further comprises a power detection module, the power detection module detects whether an external power input is provided to the power input port, and the circuit board controls the heat dissipation fan to start or stop rotating according to a signal transmitted by the power detection module.
- The mobile power supply according to claim 1, wherein the number of the mounting portions is 4, the circuit board connects the 4 battery packs in series, and an output voltage of the mobile power supply is a sum of output voltages of the 4 battery packs.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212319 | 2019-03-20 | ||
| CN2019102123193 | 2019-03-20 | ||
| PCT/CN2020/080425 WO2020187321A1 (en) | 2019-03-20 | 2020-03-20 | Power supply device |
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| CN112313851A true CN112313851A (en) | 2021-02-02 |
| CN112313851B CN112313851B (en) | 2024-04-09 |
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| WO (1) | WO2020187321A1 (en) |
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| CN113541258A (en) * | 2021-07-21 | 2021-10-22 | 研祥智能科技股份有限公司 | Charging and discharging device |
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Also Published As
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| CN112313851B (en) | 2024-04-09 |
| WO2020187321A1 (en) | 2020-09-24 |
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