CN114301118A - DC brushless electric tool - Google Patents
DC brushless electric tool Download PDFInfo
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- CN114301118A CN114301118A CN202111587127.4A CN202111587127A CN114301118A CN 114301118 A CN114301118 A CN 114301118A CN 202111587127 A CN202111587127 A CN 202111587127A CN 114301118 A CN114301118 A CN 114301118A
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Abstract
The invention relates to a direct current brushless electric tool.A controller (6) sends a first control signal to disconnect a switch module (10) when the obtained working parameters of a battery pack meet a first preset condition; the controller (6) sends a second control signal to control the switch module (10) to be switched on or switched off when the acquired working parameter of the battery pack meets a second preset condition, and then sends a third control signal replacing the second control signal to control the switch module (10) to be switched on or switched off when the working parameter of the battery pack meets a third preset condition; and when the acquired working parameters of the battery pack meet a fourth preset condition, the controller (6) sends a fourth control signal to control the switch-on or switch-off of the switch module (10). The brushless electric tool of direct current can be according to the operating parameter that the start-up is different for the battery package is under best operating condition all the time, with extension battery package life, thereby extension brushless electric tool of direct current's live time promotes to use and experiences.
Description
Technical Field
The present invention relates to a brushless dc power tool, and more particularly, to a brushless dc power tool with low temperature start protection control.
Background
With the development of the direct-current brushless electric tool, a starting control technology appears, the starting control technology can control the discharging capacity of the battery pack, reduce the unrecoverable damage to the battery pack, slow down the reduction of the capacity of the battery pack and further prolong the service time of the direct-current brushless electric tool.
In the conventional technology, a low-temperature start control method is adopted to perform discharge control on a battery pack, namely, when the temperature of the battery pack is lower than a preset threshold, the input power of a motor is reduced, so that the load of the battery pack is reduced, and when the temperature is higher than the preset threshold, the input power of the motor is in a normal state, so that the daily use of an operator is met.
However, when the dc brushless electric tool is in an extremely low temperature environment, the controller controls the battery pack to supply power to the motor and start the motor, but when the battery pack supplies power in the extremely low temperature environment, not only the output power is reduced, but also the discharge capacity of the battery itself is rapidly reduced, which reduces the service life of the battery pack, reduces the capacity of the battery pack, and affects the service time of the machine.
Disclosure of Invention
The technical problem that this application will be solved provides a DC brushless electric tool with low temperature starts protection control.
In order to solve the above technical problem, the present application provides a dc brushless electric tool, comprising: the brushless motor is configured to rotate after obtaining electric energy so as to drive the electric tool to work; a battery pack configured to supply electric power to the brushless motor; a switch module configured to selectively turn on or off a current path of the battery pack to the brushless motor; the controller is configured to control the switch module to be switched on or switched off according to the working parameters of the battery pack; the controller sends a first control signal to disconnect the switch module when the working parameter of the battery pack is acquired to meet a first preset condition; the controller sends a second control signal to control the switch module to be switched on or switched off when the working parameter of the battery pack is acquired to meet a second preset condition, and then sends a third control signal replacing the second control signal to control the switch module to be switched on or switched off when the working parameter of the battery pack meets a third preset condition; and when the controller acquires that the working parameters of the battery pack accord with a fourth preset condition, the controller sends a fourth control signal to control the switch-on or switch-off of the switch module.
In above-mentioned brushless electric tool of direct current, the working parameter of battery package is when according with first preset condition, does not start the motor, avoids the irrecoverable damage that ultra-low temperature starts to cause the battery, the working parameter of battery package is when according with the second preset condition, and second control signal makes the motor be in a low operating condition to reduce the load to the battery package, the life of extension battery package, it is further, the working parameter of battery package is when according with the third preset condition, outputs third control signal, optimizes the operating condition of motor, with the life of extension battery package, the working parameter of battery package is when according with the fourth preset condition, outputs fourth control signal, makes the motor be in normal operating condition, satisfies the daily use of operator.
As a further improvement of the above dc brushless electric power tool of the present application, the operating parameter of the battery pack includes an operating temperature and/or an operating voltage, and the operating parameter of the battery pack meets a first preset condition that the operating temperature of the battery pack is lower than a first temperature threshold; the working parameter of the battery pack meets a second preset condition that the working temperature of the battery pack is higher than a first temperature threshold and lower than a second temperature threshold; the working parameter of the battery pack meets a third preset condition that the working voltage of the battery pack rises to a preset voltage threshold; and if the working parameters of the battery pack meet a fourth preset condition, the working temperature of the battery pack is higher than a second temperature threshold.
In above-mentioned brushless electric tool of direct current, brushless electric tool of direct current can have different operating condition under the operating parameter of difference, and then the extension brushless electric tool of direct current's life promotes and uses experience.
As a further improvement of the above dc brushless power tool of the present application, the first control signal is a pulse width modulation signal having a first duty cycle, the second control signal is a pulse width modulation signal having a second duty cycle, the third control signal is a pulse width modulation signal having a third duty cycle, and the fourth control signal is a pulse width modulation signal having a fourth duty cycle, wherein the first duty cycle is 0, the second duty cycle is lower than the third duty cycle, and the second duty cycle is lower than the fourth duty cycle.
In above-mentioned brushless electric tool of direct current, brushless electric tool of direct current is when accords with first preset condition, promptly when brushless electric tool of direct current is in extremely low temperature environment, first duty cycle is 0, and the motor is out of work, avoids the battery package damage that the low temperature starts to cause, brushless electric tool of direct current is when accords with the second preset condition, promptly when brushless electric tool of direct current is in low temperature environment, the second duty cycle is less than third duty cycle with wherein arbitrary of fourth duty cycle makes the motor be in the low-state operation, can satisfy the operator and use, can not cause the damage to the battery again, extension brushless electric tool of direct current's life.
As a further improvement of the above-mentioned dc brushless power tool of the present application, the third duty cycle and the fourth duty cycle are the same.
In the above dc brushless electric power tool, the third duty ratio may satisfy daily use of an operator when the dc brushless electric power tool is in a low temperature state.
As a further improvement of the above-mentioned dc brushless electric power tool of the present application, the dc brushless electric power tool further includes a detection module for outputting an interrupt signal to the controller when the operating temperature of the battery pack is higher than a second temperature threshold.
In the above dc brushless electric tool, the detection module can distinguish whether the operating temperature of the battery pack is greater than the second temperature threshold value, so as to output an interrupt signal to the controller, thereby optimizing the operating state of the dc brushless electric tool.
As a further improvement of the above-mentioned dc brushless electric power tool of the present application, the detection module includes: a temperature sensor having different resistance values according to a change in operating temperature of the battery pack; and the input end of the comparator circuit is connected with the temperature sensor and is used for outputting an interrupt signal to the controller when the resistance value of the temperature sensor is lower than a preset value, wherein when the resistance value of the temperature sensor is lower than the preset value, the working temperature of the battery pack is higher than a second temperature threshold value.
In the above dc brushless electric tool, the temperature sensor has different resistance values as the operating temperature of the battery pack changes, and when the resistance value of the temperature sensor is smaller than the preset value of the comparator, that is, the operating temperature of the battery pack is higher than the second temperature threshold, the comparator outputs an interrupt signal to the controller, thereby optimizing the operating state of the dc brushless electric tool.
As a further improvement of the above-mentioned dc brushless power tool of the present application, the comparator circuit includes: the output end of the comparator is connected with the controller, and the first input end of the comparator is grounded through the temperature sensor; a first end of the first resistor is connected with a circuit supply Voltage (VCC), and a second end of the first resistor is connected with a first input end of the comparator and is grounded through the temperature sensor; a first end of the second resistor is connected with a circuit supply Voltage (VCC), and a second end of the second resistor is connected with a second input end of the comparator; and the first end of the third resistor is connected with the second resistor and the second input end of the comparator, and the second end of the third resistor is grounded.
In the above dc brushless electric tool, the resistance value of the temperature sensor changes with the temperature change, and the resistance value is timely output to the comparator, and the comparator sends a signal to optimize the working state of the dc brushless electric tool.
As a further improvement of the above dc brushless electric tool of the present application, the dc brushless electric tool further includes a heating module, the controller sends a second control signal to control the switch module to be turned on or off and also supplies electric energy to the heating module when acquiring that the operating parameter of the battery pack satisfies a second preset condition, and the controller sends a third control signal replacing the second control signal to control the switch module to be turned on or off and also terminates electric energy supply to the heating module when acquiring that the operating parameter of the battery pack satisfies a third preset condition.
In the above dc brushless electric tool, when the operating parameter of the battery pack conforms to the second preset condition, the heating module generates heat by supplying power to the heating module, and transfers the heat to the battery pack, so that the battery pack conforms to the fourth preset condition as soon as possible, thereby satisfying the daily use of an operator, and when the operating parameter of the battery pack conforms to the third preset condition, the operating temperature of the battery pack can rapidly rise, the electric energy supply to the heating module is terminated, thereby avoiding the waste of the electric energy of the battery pack, and simultaneously prolonging the service life of the dc brushless electric tool.
As a further improvement of the above-mentioned dc brushless electric power tool of the present application, the dc brushless electric power tool further includes an indicator light module, the indicator light module includes: a first indicator light for characterizing a first color when illuminated; a second indicator light for characterizing a second color when illuminated; a third indicator light for characterizing a third color when illuminated; the fourth indicator light is used for representing a fourth color when the battery pack is lightened, and the controller enables the first indicator light to be lightened when the working parameters of the battery pack are acquired to meet a first preset condition; the controller enables the second indicator light to be turned on when the working parameters of the battery pack are acquired to meet a second preset condition, and enables the third indicator light to be turned on when the working parameters of the battery pack meet a third preset condition; and the controller enables a fourth indicator light to be turned on when the working parameters of the battery pack are acquired to accord with a fourth preset condition.
In the above-mentioned brushless electric tool of direct current, the operator can be according to the colour of current pilot lamp, the state of current battery package of clear understanding, when using brushless electric tool of direct current, suitably applys the load, avoids causing unrecoverable injury to the battery package to the live time of extension brushless electric tool of direct current.
As a further improvement of the above-mentioned dc brushless power tool of the present application, the third color and the fourth color are the same.
In the above dc brushless electric tool, when the operating parameter of the battery pack satisfies the third preset condition and the fourth preset condition, the operator can be clearly informed that the color of the indicator lamp can be used normally.
Drawings
Fig. 1 is a schematic circuit structure diagram of a dc brushless electric tool according to the present application.
The symbols in the drawings and the description are as follows
1-a detection module; 11-a comparator circuit; 12-a temperature sensor; 2-a battery pack voltage sampling module; 3-a battery pack; 4-heating the module; 5-an indicator light module; 6-a controller; 7-an induced voltage sampling module; 8-a driver; 9-a current sampling module; 10-switch module.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.
Throughout the description of the present application, it is to be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Fig. 1 shows a schematic circuit diagram of a dc brushless power tool according to an embodiment of the present application. This direct current brushless electric tool includes: a brushless motor M configured to rotate to drive the electric tool to work after obtaining electric energy; a battery pack configured to supply electric power to the brushless motor M; a switch module 10 configured to selectively turn on or off a current path of the battery pack to the brushless motor M; and the controller 6 is configured to control the switch module 10 to be switched on or off according to the working parameters of the battery pack.
When the controller 6 acquires that the working parameters of the battery pack meet a first preset condition, a first control signal is sent to disconnect the switch module 10; when the controller 6 acquires that the working parameters of the battery pack accord with a second preset condition, a second control signal is sent to control the switch module 10 to be switched on or switched off, and then when the working parameters of the battery pack accord with a third preset condition, a third control signal replacing the second control signal is sent to control the switch module 10 to be switched on or switched off; and when the working parameters of the battery pack are acquired to meet a fourth preset condition, the controller 6 sends a fourth control signal to control the switch-on or switch-off of the switch module 10.
In the dc brushless electric tool of the present embodiment, when the operating parameter of the battery pack meets a first preset condition, the switch module 10 is turned off, the brushless motor M is not started, unrecoverable damage to the battery pack caused by ultra-low temperature starting is avoided, when the working parameters of the battery pack meet a second preset condition, the second control signal enables the brushless motor M to be in a low working state, to reduce the load on the battery pack and prolong the service life of the battery pack, and further, when the working parameters of the battery pack meet a third preset condition, a third control signal is output to optimize the working state of the brushless motor M, so as to prolong the service life of the battery pack, when the working parameters of the battery pack meet the fourth preset condition, and outputting a fourth control signal to enable the brushless motor M to be in a normal working state, so that daily use of an operator is met.
As shown in fig. 1, the working parameters of the battery pack include a working temperature and/or a working voltage, and the working parameters of the battery pack meet a first preset condition that the working temperature of the battery pack is lower than a first temperature threshold; the working parameter of the battery pack meets a second preset condition that the working temperature of the battery pack is higher than a first temperature threshold and lower than a second temperature threshold; the working parameter of the battery pack meets a third preset condition that the working voltage of the battery pack rises to a preset voltage threshold; and if the working parameters of the battery pack meet a fourth preset condition, the working temperature of the battery pack is higher than a second temperature threshold.
Specifically, the direct current brushless electric tool can have different working states under different working parameters, so that the battery pack is always in the best working state, the service life of the direct current brushless electric tool is prolonged, and the use experience is improved.
As a preferred embodiment, as shown in fig. 1, the first control signal is a pulse width modulation signal having a first duty ratio, the second control signal is a pulse width modulation signal having a second duty ratio, the third control signal is a pulse width modulation signal having a third duty ratio, and the fourth control signal is a pulse width modulation signal having a fourth duty ratio, wherein the first duty ratio is 0, the second duty ratio is lower than the third duty ratio, and the second duty ratio is lower than the fourth duty ratio.
Specifically, when the dc brushless electric tool meets a first preset condition, that is, when the dc brushless electric tool is in an extremely low temperature environment, the first duty ratio is 0, and at this time, the brushless motor M does not operate, so that the battery pack damage caused by low temperature starting is avoided; when the direct current brushless electric tool accords with a second preset condition, namely when the direct current brushless electric tool is in a low-temperature environment, the second duty ratio is lower than any one of the third duty ratio and the fourth duty ratio, so that the brushless motor M is in low-state operation, the use of an operator can be met, the battery cannot be damaged, and the service life of the direct current brushless electric tool is prolonged.
In a preferred embodiment, as shown in fig. 1, the third duty cycle and the fourth duty cycle are the same.
Specifically, when the dc brushless electric tool is in a low temperature state, the third duty cycle and the fourth duty cycle are the same, so that the daily use of an operator can be satisfied, and the battery pack is not damaged.
As a preferred embodiment, as shown in fig. 1, the dc brushless electric power tool further includes a detection module configured to output an interrupt signal to the controller 6 when the operating temperature of the battery pack is higher than a second temperature threshold.
Specifically, the detection module 1 can distinguish whether the operating temperature of the battery pack is greater than a second temperature threshold value, so as to output an interrupt signal to the controller 6, thereby optimizing the operating state of the dc brushless electric tool.
As a preferred embodiment, as shown in fig. 1, the detection module 1 includes: a temperature sensor 12, the temperature sensor 12 having different resistance values according to a change in operating temperature of the battery pack; and the input end of the comparator circuit 11 is connected with the temperature sensor 12, and is used for outputting an interrupt signal to the controller 6 when the resistance value of the temperature sensor 12 is lower than a preset value, wherein when the resistance value of the temperature sensor 12 is lower than the preset value, the working temperature of the battery pack is higher than a second temperature threshold value.
Specifically, when the working temperature of the battery pack changes, the temperature sensor 12 has different resistance values, and when the resistance value of the temperature sensor 12 is smaller than the preset value of the comparator circuit 11, that is, the working temperature of the battery pack is higher than the second temperature threshold, the comparator circuit 11 outputs an interrupt signal to the controller 6, so as to optimize the working state of the dc brushless electric tool.
As a preferred embodiment, as shown in fig. 1, the comparator circuit 11 includes: the output end of the comparator is connected with the controller 6, and the first input end of the comparator is grounded through the temperature sensor 12; a first resistor R1, a first end of the first resistor R1 is connected to a circuit supply voltage VCC, a second end of the first resistor R1 is connected to a first input end of the comparator, and is grounded through the temperature sensor 12; a second resistor R2, a first end of the second resistor R2 is connected to a circuit supply voltage VCC, and a second end of the second resistor R2 is connected to a second input end of the comparator; a third resistor R3, a first end of the third resistor R3 is connected with the second resistor R2 and the second input end of the comparator, and a second end of the third resistor R3 is grounded.
Specifically, the temperature sensor 12 receives a temperature change and outputs a resistance value change to the comparator in time, and the comparator sends a signal so as to optimize the working state of the dc brushless electric tool.
As a preferred embodiment, as shown in fig. 1, the dc brushless electric power tool further includes a heating module 4, the controller 6 sends a second control signal to control the on/off of the switch module 10 and supply electric power to the heating module 4 when it is determined that the operating parameter of the battery pack satisfies a second preset condition, and the controller 6 sends a third control signal in place of the second control signal to control the on/off of the switch module 10 and terminate the supply of electric power to the heating module 4 when it is determined that the operating parameter of the battery pack satisfies a third preset condition.
Specifically, when the working parameters of the battery pack accord with the second preset condition, the heating module 4 is enabled to generate heat through the power supply to the heating module 4, the heat is transferred to the battery pack, the damage of low temperature to the battery pack is reduced, when the working parameters of the battery pack accord with the third preset condition, the working temperature of the battery pack can be rapidly increased through the working temperature, the electric energy supply to the heating module 4 can be stopped, the waste of the electric energy of the battery pack is avoided, and meanwhile, the service time of the direct-current brushless electric tool is prolonged.
As a preferred embodiment, as shown in fig. 1, the dc brushless electric power tool further includes an indicator light module 5, and the indicator light module 5 includes: a first indicator light for characterizing a first color when illuminated; a second indicator light for characterizing a second color when illuminated; a third indicator light for characterizing a third color when illuminated; the fourth indicator light is used for representing a fourth color when the battery pack is lightened, and the controller 6 enables the first indicator light to be lightened when the working parameters of the battery pack are acquired to meet a first preset condition; the controller enables the second indicator light to be turned on when the working parameters of the battery pack are acquired to meet a second preset condition, and enables the third indicator light to be turned on when the working parameters of the battery pack meet a third preset condition; and the controller enables a fourth indicator light to be turned on when the working parameters of the battery pack are acquired to accord with a fourth preset condition.
Specifically, an operator can clearly know the current state of the battery pack according to the color of the current indicator light, and when the direct-current brushless electric tool is used, the load is loaded properly so as to prolong the service life of the direct-current brushless electric tool.
In a preferred embodiment, the third color and the fourth color are the same.
Specifically, when the working parameters of the battery pack meet the third preset condition and the fourth preset condition, the damage to the battery pack in a normal working state is small, the use requirement of an operator can be met, and the operator can be clearly informed that the direct-current brushless electric tool can be normally used by the color of the indicating lamp.
The modules in the battery pack may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dc brushless power tool comprising:
a brushless motor (M) configured to rotate to drive the power tool to work after obtaining electric energy;
a battery pack configured to supply electric power to the brushless motor;
a switching module (10) configured to selectively switch on or off a current path of the battery pack to the brushless motor (M);
a controller (6) configured to control the switching on or off of the switching module (10) according to an operating parameter of a battery pack;
it is characterized in that the preparation method is characterized in that,
the controller (6) sends a first control signal to disconnect the switch module (10) when the working parameters of the battery pack are acquired to meet a first preset condition;
the controller (6) sends a second control signal to control the switch module (10) to be switched on or switched off when the working parameter of the battery pack is acquired to meet a second preset condition, and then sends a third control signal replacing the second control signal to control the switch module (10) to be switched on or switched off when the working parameter of the battery pack meets a third preset condition;
and when the acquired working parameters of the battery pack meet a fourth preset condition, the controller (6) sends a fourth control signal to control the switch-on or switch-off of the switch module (10).
2. The DC brushless power tool of claim 1, wherein the operating parameters of the battery pack include an operating temperature and/or an operating voltage,
the working parameter of the battery pack meets a first preset condition that the working temperature of the battery pack is lower than a first temperature threshold;
the working parameter of the battery pack meets a second preset condition that the working temperature of the battery pack is higher than a first temperature threshold and lower than a second temperature threshold;
the working parameter of the battery pack meets a third preset condition that the working voltage of the battery pack rises to a preset voltage threshold;
and if the working parameters of the battery pack meet a fourth preset condition, the working temperature of the battery pack is higher than a second temperature threshold.
3. The dc brushless power tool of claim 2, wherein the first control signal is a pulse width modulated signal having a first duty cycle, the second control signal is a pulse width modulated signal having a second duty cycle, the third control signal is a pulse width modulated signal having a third duty cycle, and the fourth control signal is a pulse width modulated signal having a fourth duty cycle, wherein the first duty cycle is 0, the second duty cycle is lower than the third duty cycle, and the second duty cycle is lower than the fourth duty cycle.
4. The dc brushless power tool of claim 3, wherein the third duty cycle and the fourth duty cycle are the same.
5. The dc brushless power tool according to claim 2, further comprising a detection module (1) for outputting an interrupt signal to the controller (6) when the operating temperature of the battery pack is above a second temperature threshold.
6. The brushless direct current electric tool according to claim 5, characterized in that the detection module (1) comprises:
a temperature sensor (12), the temperature sensor (12) having different resistance values according to a change in an operating temperature of the battery pack;
the input end of the comparator circuit (11) is connected with the temperature sensor (12) and is used for outputting an interrupt signal to the controller (6) when the resistance value of the temperature sensor (12) is lower than a preset value, wherein when the resistance value of the temperature sensor (12) is lower than the preset value, the working temperature of the battery pack is higher than a second temperature threshold value.
7. The dc brushless electric power tool according to claim 6, characterized in that the comparator circuit (11) comprises:
the output end of the comparator is connected with the controller (6), and the first input end of the comparator is grounded through the temperature sensor (12);
a first resistor (R1), a first terminal of the first resistor (R1) being connected to a circuit supply Voltage (VCC), a second terminal of the first resistor (R1) being connected to a first input terminal of the comparator and to ground via the temperature sensor (12);
a second resistor (R2), a first end of the second resistor (R2) is connected with a circuit supply Voltage (VCC), and a second end of the second resistor (R2) is connected with a second input end of the comparator;
a third resistor (R3), a first terminal of the third resistor (R3) being connected to the second resistor (R2) and to a second input terminal of the comparator, a second terminal of the third resistor (R3) being connected to ground.
8. The dc brushless power tool according to any one of claims 1-7, further comprising a heating module (4);
when the controller (6) acquires that the working parameters of the battery pack accord with a second preset condition, the controller sends a second control signal to control the on or off of the switch module (10), simultaneously supplies electric energy to the heating module (4), and supplies electric energy to the heating module
And when the controller (6) acquires that the working parameters of the battery pack meet a third preset condition, the controller sends a third control signal replacing the second control signal to control the switch-on or switch-off of the switch module (10), and simultaneously stops the power supply to the heating module (4).
9. The dc brushless power tool according to claim 8, further comprising an indicator light module (5), the indicator light module (5) comprising:
a first indicator light for characterizing a first color when illuminated;
a second indicator light for characterizing a second color when illuminated;
a third indicator light for characterizing a third color when illuminated;
a fourth indicator light for characterizing a fourth color when illuminated,
the controller (6) enables the first indicator light to be turned on when the working parameters of the battery pack are acquired to meet a first preset condition;
the controller (6) enables the second indicator light to be turned on when the working parameters of the battery pack are acquired to meet a second preset condition, and enables the third indicator light to be turned on when the working parameters of the battery pack meet a third preset condition;
and the controller (6) enables a fourth indicator light to be turned on when the working parameters of the battery pack are acquired to meet a fourth preset condition.
10. The dc brushless electric power tool of claim 9, wherein the third color and the fourth color are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587127.4A CN114301118A (en) | 2021-12-23 | 2021-12-23 | DC brushless electric tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587127.4A CN114301118A (en) | 2021-12-23 | 2021-12-23 | DC brushless electric tool |
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| CN114301118A true CN114301118A (en) | 2022-04-08 |
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| CN202111587127.4A Pending CN114301118A (en) | 2021-12-23 | 2021-12-23 | DC brushless electric tool |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202225179U (en) * | 2010-04-07 | 2012-05-23 | 布莱克和戴克公司 | Power tool and power tool system |
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| CN112910068A (en) * | 2020-11-23 | 2021-06-04 | 湖南中联重科智能高空作业机械有限公司 | Control device for motor driver, motor driver and overhead working truck |
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