Charging protection equipment

Abstract

The utility model discloses charging protection equipment, and relates to the field of battery charging, the charging protection equipment comprises a charger, a voltage comparator, a timing voltage regulator, a charging time relay and a pre-charging time relay, the input end of the charger is connected with a power supply, and the output end of the charger is connected with a to-be-charged battery pack; a charging time relay and a pre-charging time relay are arranged between the charger and the battery pack to be charged in parallel; the input end of the timing voltage regulator is electrically connected with a power supply, the output end of the timing voltage regulator is electrically connected with the first input end of the voltage comparator, the second input end of the voltage comparator is electrically connected with a battery pack to be charged, and when the input voltage of the second input end of the voltage comparator is not smaller than the input voltage of the first input end, the battery pack is charged. The output end outputs a first level signal; the charging time relay is disconnected after receiving the first level signal, and the charger stops charging after receiving the first level signal. The charging imbalance phenomenon of the battery pack is eliminated, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of battery charging, and particularly to a charging protection device. Background Art

[0002] With the rapid development of the new energy industry, the demand for battery packs has gradually increased, which has also led to the high price of battery packs. Therefore, more and more users begin to pay attention to how to extend the service life of battery packs so as to reduce the use cost.

[0003] Since the existing battery packs usually adopt a configuration of multiple single cells connected in series, and there are state differences among the single cells, some single cells are already in a fully charged state during the charging process, while some single cells are in an undercharged state. At this time, since the fully charged battery will trigger the overcharge protection of the charging device to stop charging, some single cells will be in a discharged state for a long time. This kind of phenomenon is the charging imbalance phenomenon of the battery pack. And for the battery pack with charging imbalance phenomenon, there is a high risk of performance degradation or even damage during long-term use. Therefore, how to eliminate the charging imbalance phenomenon of the battery pack and extend the service life of the battery pack has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a charging protection device to achieve the purpose of eliminating the charging imbalance phenomenon of the battery pack and extending the service life of the battery pack. The specific solutions are as follows:

[0005] In the first aspect of this application, a charging protection device is provided, including:

[0006] A charger, a voltage comparator, a timing voltage regulator, a charging time relay, and a pre-charging time relay,

[0007] The input end of the charger is electrically connected to the power supply, the output end of the charger is electrically connected to the battery pack to be charged, and the charging time relay and the pre-charging time relay are arranged in parallel between the charger and the battery pack to be charged;

[0008] The input end of the timing voltage regulator is electrically connected to the power supply, the output end of the timing voltage regulator is electrically connected to the first input end of the voltage comparator, and the second input end of the voltage comparator is electrically connected to the battery pack to be charged;

[0009] The output terminals of the voltage comparator are electrically connected to the control terminal of the charging time relay and the control terminal of the charger respectively; when the charger is powered on, the charger operates in a pre-charging mode for a preset duration and switches to a charging mode at the end of the preset duration. The pre-charging time relay closes for the preset duration and disconnects at the end of the preset duration. The timing voltage regulator starts timing and outputs the rated voltage of the battery pack to be charged at a first moment before the end of the preset duration. The charging time relay starts timing and switches from the off state to the on state at the first moment.

[0010] When the input voltage at the second input terminal of the voltage comparator is not less than the input voltage at the first input terminal of the voltage comparator, the output terminal of the voltage comparator outputs a first level signal; the charging time relay disconnects when the control terminal of the charging time relay receives the first level signal, and the charger terminates charging when the control terminal of the charger receives the first level signal.

[0011] In a possible implementation, the charging protection device further includes:

[0012] A pre-charging protection resistor, which is connected in series between the pre-charging time relay and the battery pack to be charged.

[0013] In a possible implementation, the charging protection device further includes:

[0014] A data transmission interface, one end of which is electrically connected to the output terminal of the voltage comparator, and the other end of which is communicatively connected to a monitoring device.

[0015] In a possible implementation, the charging protection device further includes:

[0016] A display device, which is electrically connected to the output terminal of the voltage comparator.

[0017] In a possible implementation, the charging protection device further includes:

[0018] A protective housing, which is configured with a handle.

[0019] In a possible implementation, the charging protection device further includes:

[0020] A cooling fan, which is electrically connected to the power supply.

[0021] In a possible implementation, the charging protection device further includes:

[0022] An emergency stop switch, and the emergency stop switch is connected in series between the power supply and the input end of the charger.

[0023] In a possible implementation, the charging protection device further includes:

[0024] A protective cover that covers the operation button of the emergency stop switch.

[0025] In a possible implementation, the charging protection device further includes:

[0026] An indicator light, and the indicator light is electrically connected to the output end of the voltage comparator.

[0027] In a possible implementation, a switch is arranged at the input end of the charger.

[0028] By means of the above technical solution, a charging protection device provided by the present application electrically connects the input end of the charger to the power supply, and the output end of the charger is electrically connected to the battery pack to be charged. A charging time relay and a pre-charge time relay are arranged in parallel between the charger and the battery pack to be charged. When the charger is powered on, the charger operates in a pre-charge mode for a preset duration and switches to a charging mode at the end of the preset duration. The pre-charge time relay is closed for the preset duration and disconnects at the end of the preset duration. The charging time relay starts timing and switches from the off state to the on state at the first moment, thereby constructing a pre-charge circuit and a charging circuit for the charger to charge the battery pack to be charged, and realizing the charging function for the battery pack to be charged. At the same time, by electrically connecting the input end of the timing voltage regulator to the power supply, the output end of the timing voltage regulator to the first input end of the voltage comparator, and the second input end of the voltage comparator to the battery pack to be charged, when the charger is powered on, the timing voltage regulator starts timing and outputs the rated voltage of the battery pack to be charged at the first moment before the end of the preset duration, thereby realizing the acquisition of the rated voltage and the actual voltage of the battery pack to be charged. Finally, when the input voltage at the second input end of the voltage comparator is not less than the input voltage at the first input end of the voltage comparator, the output end of the voltage comparator outputs a first level signal; the charging time relay disconnects when the control end of the charging time relay receives the first level signal, and the charger terminates charging when the control end of the charger receives the first level signal, ensuring that there is no charging imbalance phenomenon in the battery pack to be charged when charging is terminated. It can be seen that the present application eliminates the charging imbalance phenomenon of the battery pack and prolongs the service life of the battery pack. Description of the Drawings

[0029] In combination with the accompanying drawings and with reference to the following specific embodiments, the above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that the original and elements are not necessarily drawn to scale.

[0030] Figure 1 It is a schematic structural diagram of a charging protection device provided by this application;

[0031] Figure 2 It is a charging schematic diagram of a battery pack to be charged provided by this application;

[0032] Figure 3 It is a circuit diagram of a voltage comparator provided by this application;

[0033] Figure 4 It is a schematic diagram of a protective housing provided by this application;

[0034] Figure 5 It is an exploded view of the structure of a charging protection device provided by this application. Specific Embodiments

[0035] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0036] The embodiments of the present application will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0037] The terms "first", "second", etc. in the specification, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, and this is only a way of distinguishing when describing objects with the same attributes in the embodiments of the present application. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product, or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products, or devices.

[0038] The first aspect of the present application provides a charging protection device, as Figure 1 shown, the charging protection device includes:

[0039] A charger 101, a voltage comparator 102, a timing voltage regulator 103, a charging time relay 104 and a pre-charging time relay 105. The input end of the charger 101 is electrically connected to a power supply, and the output end of the charger 101 is electrically connected to a battery pack to be charged. A charging time relay 104 and a pre-charging time relay 105 are arranged in parallel between the charger 101 and the battery pack to be charged;

[0040] The input end of the timing voltage regulator 103 is electrically connected to the power supply, the output end of the timing voltage regulator 103 is electrically connected to the first input end of the voltage comparator 102, and the second input end of the voltage comparator 102 is electrically connected to the battery pack to be charged;

[0041] The output end of the voltage comparator 102 is electrically connected to the control end of the charging time relay 104 and the control end of the charger 101 respectively;

[0042] When the charger 101 is powered on, the charger 101 operates in a pre-charging mode for a preset duration and switches to a charging mode at the end moment of the preset duration. The pre-charging time relay 105 closes for the preset duration and disconnects at the end moment of the preset duration. The timing voltage regulator 103 starts timing and outputs the rated voltage of the battery pack to be charged at a first moment before the end moment of the preset duration. The charging time relay 104 starts timing and switches from the off state to the on state at the first moment;

[0043] When the input voltage at the second input end of the voltage comparator 102 is not less than the input voltage at the first input end of the voltage comparator 102, the output end of the voltage comparator 102 outputs a first level signal; the charging time relay 104 disconnects when the control end of the charging time relay 104 receives the first level signal, and the charger 101 terminates charging when the control end of the charger 101 receives the first level signal.

[0044] It should be noted that in an actual application scenario, the above-mentioned charger 101 can be a device that converts the current input from the power supply into a charging current adapted to the battery pack to be charged through a built-in rectifying circuit and a buck-boost circuit. For example, assuming that the power supply input is 220V alternating current and the charging current of the battery pack to be charged is 96V direct current, the charger can convert 220V alternating current into 96V alternating current through the internal buck-boost circuit, and then convert 96V alternating current into 96V direct current through the rectifying circuit, so as to charge the battery pack to be charged with the 96V direct current.

[0045] It should be noted that in an actual application scenario, the above-mentioned battery pack to be charged is a battery pack with a configuration of multiple single cells connected in series, such as Figure 2As shown, it is a charging schematic diagram of a battery pack to be charged. The battery pack to be charged is composed of a total of n single cells, namely "c-1", "c-2",..., "c-n", connected in series. When charging, the "charging +" pole of the charging device is electrically connected to the positive pole of the battery pack to be charged, and the "charging -" pole of the charging device is electrically connected to the negative pole of the battery pack to be charged, thus forming a charging circuit.

[0046] It should be noted that in the actual application scenario, the above voltage comparator 103 is a circuit used to identify and compare input voltage signals. The circuit diagram of the voltage comparator 103 is as Figure 3 As shown, the voltage comparator 301 is configured with a first input terminal 304, a second input terminal 303, an output terminal 305, a power-on terminal 302, a pull-up resistor R1, and protection resistors (R2 and R3). If the input voltage of the second input terminal 303 is less than the input voltage of the first input terminal 304, the output terminal 305 outputs a high-level signal. If the input voltage of the second input terminal 303 is not less than the input voltage of the first input terminal 304, the output terminal 305 outputs a low-level signal.

[0047] It should be noted that compared with the existing charging device, this application eliminates the charging imbalance phenomenon of the battery pack. Specifically: when the existing charging device detects that the voltages of multiple single cells are equal to the rated voltage of the single cell, it determines that the battery pack is fully charged and stops charging. However, if there is a single cell voltage that is not detected and is less than the rated voltage, there is a charging imbalance phenomenon in the current battery pack. For a battery pack with a configuration of multiple single cells connected in series, if there is an uncharged single cell, the voltage between the positive and negative poles of the battery pack is less than the rated voltage of the battery pack. Therefore, in this application, by configuring the second input terminal of the voltage comparator to be electrically connected to the battery pack to be charged, the acquisition of the voltage between the positive and negative poles of the battery pack to be charged is realized. Subsequently, by configuring the input terminal of the timing voltage regulator to be electrically connected to the power supply, the output terminal of the timing voltage regulator to be electrically connected to the first input terminal of the voltage comparator 102, and configuring that when the charging machine is powered on, the timing voltage regulator starts timing and outputs the rated voltage of the battery pack to be charged at the first moment before the end of the preset duration, the acquisition of the rated voltage of the battery pack to be charged is realized. Finally, by configuring that when the input voltage of the second input terminal of the voltage comparator is not less than the input voltage of the first input terminal of the voltage comparator, the output terminal of the voltage comparator outputs a first-level signal; the charging time relay disconnects when the control terminal of the charging time relay receives the first-level signal, and the charging machine terminates charging when the control terminal of the charging machine receives the first-level signal, thereby ensuring that there is no charging imbalance phenomenon when the battery pack to be charged is fully charged.

[0048] It should be noted that in the actual application scenario, the above-mentioned charging time relay 104 and pre-charging time relay 105 can be time relays with pre-configured timing times. A timing relay is a relay whose output circuit undergoes a jump change (or contact) action after a specified accurate time when an input action signal is added (or removed). Through the configuration of the above-mentioned charging time relay 104 and pre-charging time relay 105, this application realizes the control of the pre-charging and charging processes of the battery pack to be charged.

[0049] It should be noted that in the actual application scenario, the above-mentioned timing voltage regulator 103 is a device with an adjustable voltage level that can be timed. By pre-configuring the start time and output voltage level of the timing voltage regulator 103, this application realizes the simulation of the rated voltage of the battery pack to be charged. Moreover, since the start time and output voltage level of the above-mentioned timing voltage regulator are adjustable, a charging protection device provided by this application can be adapted to battery packs to be charged with different specifications.

[0050] In a possible implementation, the way for the above-mentioned timing voltage regulator 103 to start timing and output the rated voltage of the battery pack to be charged at the first moment before the end moment of the preset duration can be: when the charger is powered on, the timing voltage regulator 103 starts timing and outputs the rated voltage when the end moment of the preset timing duration is reached, where the end moment of the preset timing duration is the above-mentioned first moment, and the preset timing duration is less than the preset duration.

[0051] It should be noted that the control logic set by the technical personnel based on the structure of the charging protection device is not limited to the above process. The solution of this application lies in protecting the structure of the charging protection device, and the detection and elimination methods for the charging imbalance phenomenon of the battery pack to be charged that can be realized based on this structure can be set by the technical personnel according to the actual situation.

[0052] In a possible implementation, the above-mentioned preset duration can be a pre-charging duration preset according to the specifications of the battery pack to be charged.

[0053] In this application, the input end of the charger is configured to be electrically connected to a power supply, and the output end of the charger is electrically connected to the battery pack to be charged. A charging time relay and a pre-charging time relay are arranged in parallel between the charger and the battery pack to be charged. When the charger is powered on, the charger operates in a pre-charging mode for a preset duration and switches to a charging mode at the end of the preset duration. The pre-charging time relay closes for the preset duration and disconnects at the end of the preset duration. The charging time relay starts timing and switches from the off state to the on state at a first moment, constructing a pre-charging circuit and a charging circuit for the charger to charge the battery pack to be charged, and realizing the charging function of the battery pack to be charged. At the same time, by configuring the input end of the timing voltage regulator to be electrically connected to the power supply, the output end of the timing voltage regulator to be electrically connected to the first input end of the voltage comparator, and the second input end of the voltage comparator to be electrically connected to the battery pack to be charged, when the charger is powered on, the timing voltage regulator starts timing and outputs the rated voltage of the battery pack to be charged at a first moment before the end of the preset duration, realizing the acquisition of the rated voltage and the actual voltage of the battery pack to be charged. Finally, by configuring that when the input voltage at the second input end of the voltage comparator is not less than the input voltage at the first input end of the voltage comparator, the output end of the voltage comparator outputs a first level signal; the charging time relay disconnects when the control end of the charging time relay receives the first level signal, and the charger terminates charging when the control end of the charger receives the first level signal, ensuring that there is no charging imbalance phenomenon in the battery pack to be charged when charging is terminated. It can be seen that this application eliminates the charging imbalance phenomenon of the battery pack and prolongs the service life of the battery pack.

[0054] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0055] A pre-charging protection resistor, which is connected in series between the pre-charging time relay 105 and the battery pack to be charged.

[0056] It should be noted that since the charger 101 is powered on when the pre-charging time relay 105 closes, an impact current is easily generated at the moment when the pre-charging time relay 105 closes, which may damage the battery pack to be charged. Therefore, in this application, by configuring the above-mentioned pre-charging protection resistor to be connected in series between the pre-charging time relay 105 and the battery pack to be charged, the risk of the impact current damaging the battery pack to be charged is avoided.

[0057] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0058] A data transmission interface, one end of which is electrically connected to the output end of the voltage comparator 102, and the other end of which is communicatively connected to a monitoring device.

[0059] It should be noted that by configuring the above transmission interface, the operator can monitor the charging process of each charging protection device through the monitoring device. In the working condition where multiple charging protection devices are running, the operator does not need to check one by one, which improves the flexibility of charging process supervision.

[0060] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0061] A display device, which is electrically connected to the output end of the voltage comparator 102.

[0062] It should be noted that in the actual application scenario, by configuring the above-mentioned display device to be electrically connected to the output end of the voltage comparator 102, the present application realizes the display of the level signal output by the voltage comparator 102, so that the operator can know whether there is a charging imbalance phenomenon in the battery pack to be charged according to the display device.

[0063] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0064] A protective housing, which is configured with a handle.

[0065] It should be noted that in the actual application scenario, since a charging protection device provided by the present application can be applied to the battery protection scenario of individual users, therefore, by configuring the above-mentioned protective housing and configuring a handle on the protective housing, while protecting each component of the charging protection device, it is convenient for individual users to carry the charging protection device. The schematic diagram of the above-mentioned protective housing is as Figure 4 shown.

[0066] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0067] A cooling fan, which is electrically connected to the power supply.

[0068] It should be noted that in the actual application scenario, since the charger 101 will generate a large amount of heat during the charging process, and the generated heat will seriously affect the service life and use safety of each component of the charging protection device, therefore, by configuring a cooling fan connected to the power supply, the present application improves the heat dissipation efficiency of the charging protection device, thereby improving the service life and use safety of the charging protection device.

[0069] In a possible implementation, the above-mentioned charging protection device as Figure 1 shown further includes:

[0070] An emergency stop switch, which is connected in series between the power supply and the input end of the charger 101.

[0071] It should be noted that in the actual application scenario, due to the uncertain health status of the battery pack to be charged, there are risks such as bulging, burning, and deflagration during the charging process. Therefore, in this application, an emergency stop switch is configured in series between the power supply and the input end of the charger. When a safety risk occurs, the power supply to the charger can be cut off through the emergency stop switch to avoid the intensification of safety risks and improve the use safety.

[0072] In a possible implementation, the charging protection device as described above, such as Figure 1 shown, further includes:

[0073] A protective cover that covers the operation button of the emergency stop switch.

[0074] It should be noted that in the actual application scenario, there is a risk of damaging the charger when the emergency stop switch operates. Therefore, in this application, a protective cover is configured to cover the operation button of the emergency stop switch to avoid the risk of damage to the charger caused by accidental touch of the emergency stop switch.

[0075] In a possible implementation, the charging protection device as described above, such as Figure 1 shown, further includes:

[0076] An indicator light, which is electrically connected to the output end of the voltage comparator 102.

[0077] It should be noted that in the actual application scenario, the above indicator light can be an indicating device that emits different colored lights in response to different level signals output from the output end of the voltage comparator 102. In this application, the indicator light is configured to be electrically connected to the output end of the voltage comparator 102, so as to generate a light signal to prompt the operator whether there is an uneven charging phenomenon in the battery pack to be charged, and improve the monitoring efficiency.

[0078] In a possible implementation, a switch is configured at the input end of the above charger 101.

[0079] It should be noted that in the actual application scenario, the structure explosion diagram of the charging protection device provided in the first aspect and various possible implementations of the first aspect of this application is as shown in Figure 5 shown. It includes a display device, an emergency stop switch, an indicator light, a data transmission interface, a charger, a voltage comparator, a timing voltage regulator, a pre-charge resistor, the output end of the charger, the second input end of the voltage note ouqi, a pre-charge time relay, a charging time relay, a power interface, and a switch.

Claims

1. A charging protection device, characterized in that, Comprising: A charger, a voltage comparator, a timing voltage regulator, a charging time relay, and a pre-charging time relay. The input end of the charger is electrically connected to a power supply, and the output end of the charger is electrically connected to a battery pack to be charged. The charging time relay and the pre-charging time relay are arranged in parallel between the charger and the battery pack to be charged. The input end of the timing voltage regulator is electrically connected to the power supply, the output end of the timing voltage regulator is electrically connected to the first input end of the voltage comparator, and the second input end of the voltage comparator is electrically connected to the battery pack to be charged. The output end of the voltage comparator is electrically connected to the control end of the charging time relay and the control end of the charger respectively. When the charger is powered on, the charger operates in a pre-charging mode for a preset duration and switches to a charging mode at the end moment of the preset duration. The pre-charging time relay closes for the preset duration and disconnects at the end moment of the preset duration. The timing voltage regulator starts timing and outputs the rated voltage of the battery pack to be charged at a first moment before the end moment of the preset duration. The charging time relay starts timing and switches from the off state to the on state at the first moment. When the input voltage at the second input end of the voltage comparator is not less than the input voltage at the first input end of the voltage comparator, the output end of the voltage comparator outputs a first level signal. The charging time relay disconnects when the control end of the charging time relay receives the first level signal, and the charger terminates charging when the control end of the charger receives the first level signal.

2. The charging protection device according to claim 1, wherein, The charging protection device further comprises: A pre-charging protection resistor, which is connected in series between the pre-charging time relay and the battery pack to be charged.

3. The charging protection device according to claim 1, characterized in that The charging protection device further comprises: A data transmission interface, one end of which is electrically connected to the output end of the voltage comparator, and the other end of which is in communication connection with a monitoring device.

4. The charging protection device according to claim 1, wherein The charging protection device further comprises: A display device, which is electrically connected to the output end of the voltage comparator.

5. The charging protection device according to claim 1, characterized in that The charging protection device further comprises: A protective housing, which is configured with a handle.

6. The charging protection device according to claim 1, characterized in that, The charging protection device further comprises: A cooling fan, which is electrically connected to the power supply.

7. The charging protection device according to claim 1, wherein, The charging protection device further comprises: An emergency stop switch, which is connected in series between the power supply and the input end of the charger.

8. The charging protection device according to claim 7, wherein The charging protection device further comprises: A protective cover, which covers the operation button of the emergency stop switch.

9. The charging protection device according to claim 1, characterized in that, The charging protection device further comprises: An indicator light, which is electrically connected to the output end of the voltage comparator.

10. The charging protection device according to claim 1, characterized in that, The input end of the charger is configured with a switch.

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