CN219873666U - Control circuit of battery pack and battery pack - Google Patents

Control circuit of battery pack and battery pack Download PDF

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Publication number
CN219873666U
CN219873666U CN202223188378.8U CN202223188378U CN219873666U CN 219873666 U CN219873666 U CN 219873666U CN 202223188378 U CN202223188378 U CN 202223188378U CN 219873666 U CN219873666 U CN 219873666U
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China
Prior art keywords
unit
external interface
resistor
control circuit
battery pack
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Active
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CN202223188378.8U
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Chinese (zh)
Inventor
张梦玉
张凯
许柏皋
刘元财
陈熙
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Ecoflow Technology Ltd
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Ecoflow Technology Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model provides a control circuit of a battery pack and the battery pack, wherein the control circuit of the battery pack comprises: the battery pack comprises a first in-place detection circuit, a second in-place detection circuit and a controller, wherein the first in-place detection circuit is connected with an external interface of the battery pack and is used for outputting a first in-place signal after delaying a first time length when receiving a first input voltage through the external interface; the second in-place detection circuit is connected with the external interface and is used for outputting a second in-place signal when receiving a second input voltage through the external interface, and the levels of the first in-place signal and the second in-place signal are opposite; the controller is connected with the first in-place detection circuit and the second in-place detection circuit; the controller is used for confirming that external equipment connected with the external interface is active equipment when receiving the first in-place signal, and is used for confirming that the external equipment is passive equipment when receiving the second in-place signal. The utility model can improve the identification accuracy of the external equipment connected with the battery pack.

Description

Control circuit of battery pack and battery pack
Technical Field
The present utility model relates to the field of battery packs, and in particular, to a control circuit for a battery pack and a battery pack.
Background
Currently, in order to realize battery capacity expansion, an external battery with larger capacity, namely a battery pack, is required to be worn on the energy storage device. The battery pack is typically removably connected to a main battery pack of an active device such as an energy storage device, which is capable of providing power to the battery pack. In a new application field of the battery pack, the battery pack can be used as a power source of passive devices such as a base station. The passive device cannot provide power to the battery pack, which can be repeatedly charged and discharged to allow the user to reuse the passive device. The parallel logic when the battery pack is externally connected to the active device and the passive device is different, so that the connected external device needs to be identified, however, the current battery pack cannot accurately identify the external device.
Disclosure of Invention
The utility model mainly aims to provide a control circuit of a battery pack, which aims to improve the identification accuracy of external equipment connected with the battery pack.
In a first aspect, the present utility model provides a control circuit for a battery pack, where the battery pack includes an external interface, and the external interface is used for connecting with an external device; the control circuit includes:
the first in-place detection circuit is connected with the external interface and is used for outputting a first in-place signal after delaying for a first duration when receiving a first input voltage through the external interface;
the second in-place detection circuit is connected with the external interface and is used for outputting a second in-place signal when receiving a second input voltage through the external interface, wherein the first input voltage is larger than the second input voltage, and the levels of the first in-place signal and the second in-place signal are opposite;
the controller is connected with the first in-place detection circuit and the second in-place detection circuit; the controller is used for confirming that the external device is an active device when the first in-place signal is received, and is used for confirming that the external device is a passive device when the second in-place signal is received.
In an embodiment, the first in-bit detection circuit includes a first switch unit and a first filter unit;
the controlled end of the first switch unit is connected with the external interface, the first end of the first switch unit is grounded, the second end of the first switch unit is connected with the first end of the first filter unit, and the second end of the first switch unit is also used for being connected with a first voltage source;
the second end of the first filtering unit is connected with the first input end of the controller;
the first switch unit is used for being turned on after the first time length is delayed when the first input voltage is received, so that a first level signal is output through a second end of the first switch unit; the first filtering unit is configured to filter the first level signal to obtain the first bit signal.
In one embodiment, the first switch unit includes a first resistor, a first switch tube, a zener diode, a first capacitor and a second resistor;
the controlled end of the first switching tube is connected with the external interface through the first resistor, the first end of the first switching tube is used as the first end of the first switching unit, and the second end of the first switching tube is used as the second end of the first switching unit;
the voltage stabilizing diode is connected between the controlled end and the first end of the first switching tube, and the first capacitor and the second resistor are connected with the voltage stabilizing diode in parallel.
In an embodiment, the first switching unit further includes a pull-up resistor, a first end of the pull-up resistor is used for being connected to the first voltage source, and a second end of the pull-up resistor is connected to the second end of the first switching tube.
In an embodiment, the second in-place detection circuit includes an anti-reflection unit, a second switch unit and a second filter unit;
the output end of the anti-reflection unit is connected with the external interface, the input end of the anti-reflection unit is connected with the controlled end of the second switch unit, the first end of the second switch unit is used for being connected with a second voltage source, the second end of the second switch unit is connected with the first end of the second filter unit, and the second end of the second filter unit is connected with the second input end of the controller;
the second switch unit is used for being conducted when the second input voltage is received through the anti-reflection unit, so that the output voltage of the second voltage source is output as the second level signal; the second filtering unit is configured to filter the second level signal to obtain the second bit signal.
In an embodiment, the second switching unit includes a second switching tube, a second capacitor and a third resistor;
the controlled end of the second switching tube is used as the controlled end of the second switching unit, the first end of the second switching tube is used as the first end of the second switching unit, and the second end of the second switching tube is used as the second end of the second switching unit;
the second capacitor is connected between the controlled end and the first end of the second switch tube, and the third resistor is connected with the second capacitor in parallel.
In an embodiment, the anti-reflection unit includes an anti-reflection diode and a fourth resistor; the cathode of the anti-reflection diode is used as the output end of the anti-reflection unit, the anode of the anti-reflection diode is connected with the first end of the fourth resistor, and the second end of the fourth resistor is used as the input end of the anti-reflection unit.
In an embodiment, the control circuit further includes a communication line, and the communication line is connected between the external interface and the controller;
the controller is used for communicating with the external equipment through the communication line.
In an embodiment, the control circuit further comprises a pre-discharge circuit and a main discharge circuit, wherein the pre-discharge circuit and the main discharge circuit are both connected between the external interface and the electric energy storage unit;
the controller is also connected with the pre-discharge circuit and the main discharge circuit, and is further used for supplying power to the passive equipment through the pre-discharge circuit when the second in-place signal is received, and supplying power to the passive equipment through the main discharge circuit after communication is established between the controller and the passive equipment through the communication circuit.
In a second aspect, an embodiment of the present utility model further provides a battery pack, including:
at least one electrical energy storage unit;
the external interface is used for connecting external equipment;
the control circuit of any of the embodiments, connected between the electrical energy storage unit and the external interface, the control circuit configured to identify the external device.
The utility model provides a control circuit of a battery pack and the battery pack, wherein the control circuit of the battery pack comprises a first in-place detection circuit, a second in-place detection circuit and a controller, wherein the first in-place detection circuit is connected with an external interface of the battery pack and is used for outputting a first in-place signal after delaying a first time length when receiving a first input voltage through the external interface; the second in-place detection circuit is connected with the external interface and is used for outputting a second in-place signal when receiving a second input voltage through the external interface, wherein the first input voltage is larger than the second input voltage, and the levels of the first in-place signal and the second in-place signal are opposite; the controller is connected with the first in-place detection circuit and the second in-place detection circuit; the controller is used for confirming that external equipment connected with the external interface is active equipment when receiving the first in-place signal, and is used for confirming that the external equipment is passive equipment when receiving the second in-place signal. When the external equipment connected with the external interface is active equipment, the first in-place detection circuit receives a first input voltage and outputs a first in-place signal, and when the external equipment connected with the external interface is passive equipment, the second in-place detection circuit receives a second input voltage and outputs a second in-place signal, so that the controller can accurately determine the equipment type of the external equipment according to the first in-place signal or the second in-place signal, thereby greatly improving the identification accuracy of the external equipment connected with the battery pack as the active equipment or the passive equipment, and being beneficial to executing corresponding operation according to the identification result.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the present utility model;
fig. 2 is another schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a first in-bit detection circuit according to an embodiment of the present utility model;
fig. 4 is another schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a second in-bit detection circuit according to an embodiment of the present utility model;
fig. 6 is a schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the present utility model;
fig. 7 is a schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the present utility model;
fig. 8 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a control circuit of a battery pack according to an embodiment of the utility model.
The control circuit 100 of the battery pack may be applied to a battery pack, which may also be referred to as a power-up pack or a battery slave pack, which may also be a master pack or other energy storage device in some embodiments. The battery pack comprises a control circuit 100 of the battery pack and an external interface 10, wherein the control circuit 100 of the battery pack is connected with the external interface 10, the external interface 10 is used for connecting external equipment, the control circuit 100 of the battery pack is used for identifying the external equipment connected with the external interface 10, and corresponding operation is executed according to an identification result.
In the embodiment of the utility model, the external device comprises an active device and a passive device, wherein the active device refers to a device capable of providing a power supply to realize a power supply function, and the active device is an energy storage device or other electronic devices carrying a power supply, and the power supply can also be a battery pack or called a main battery pack. Passive devices refer to devices that cannot provide power to meet power requirements, such as base stations, converters, filters, and the like.
When the external interface 10 of the battery pack is connected to the active device, the external interface 10 may be connected to a power supply in the active device, and the active device may discharge the battery pack through the power supply. When the external interface 10 of the battery pack is connected to the passive device, the external interface 10 may be connected to a power supply interface of the passive device. Since the passive device does not carry a power supply, the battery pack cannot be discharged, but the battery pack needs to supply power to the passive device through a power supply interface of the passive device.
As shown in fig. 1, the control circuit 100 of the battery pack includes a first in-place detecting circuit 110, a second in-place detecting circuit 120, and a controller 130. The first in-place detection circuit 110 is connected to the external interface 10, and the first in-place detection circuit 110 is configured to output a first in-place signal after delaying for a first period of time when receiving a first input voltage through the external interface 10. The second in-place detection circuit 120 is connected to the external interface 10, and the second in-place detection circuit 120 is configured to output a second in-place signal when receiving a second input voltage through the external interface 10. The controller 130 is connected to the first presence detection circuit 110 and the second presence detection circuit 120, and the controller 130 is configured to confirm that the external device is an active device when receiving the first presence signal, and is configured to confirm that the external device is a passive device when receiving the second presence signal.
The first input voltage is larger than the second input voltage, and the levels of the first bit signal and the second bit signal are opposite. It should be noted that, when the external interface 10 is connected to the active device, the active device can supply power to the external interface 10 of the battery pack, so the first input voltage may be a power supply voltage provided by the active device. The second input voltage may be a ground voltage since there is no power supply in the passive device. The first input voltage is, for example, 12V and the second input voltage is, for example, 0V.
In the embodiment of the present utility model, when the external device connected to the external interface 10 is an active device, the first in-place detection circuit 110 receives the first input voltage and outputs the first in-place signal, and when the external device connected to the external interface 10 is a passive device, the second in-place detection circuit 120 receives the second input voltage and outputs the second in-place signal, and the levels of the first in-place signal and the second in-place signal are opposite, so that the controller 130 can accurately determine the device type of the external device according to the first in-place signal or the second in-place signal, thereby greatly improving the identification accuracy of the external device connected to the battery pack as the active device or the passive device.
In one embodiment, as shown in fig. 2, the first bit detection circuit 110 includes a first switch unit 111 and a first filter unit 112. The controlled end of the first switch unit 111 is connected to the external interface 10, the first end of the first switch unit 111 is grounded, the second end of the first switch unit 111 is connected to the first end of the first filter unit 112, and the second end of the first switch unit 111 is further connected to a first voltage source (not shown in the figure). A second terminal of the first filtering unit 112 is connected to a first input terminal of the controller 130.
The first switch unit 111 is configured to be turned on after a first time delay when receiving the first input voltage, so as to output a first level signal through a second end of the first switch unit 111. The first filtering unit 112 is configured to filter the first level signal to obtain a first bit signal.
It should be noted that when the active device is connected to the external interface 10, the active device outputs a power supply voltage to the external interface 10, the power supply voltage is used as a first input current to the controlled end of the first switch unit 111 after passing through the external interface 10, the first switch unit 111 delays the first input voltage for a first period after receiving the first input voltage, and switches on a path between the first end and the second end of the first switch unit 111, so that the first voltage source is grounded through the switched-on first switch unit 111, and then a first level signal output by the second end of the first switch unit 111 is a low level, and the first filter unit 112 is used for filtering the low level to obtain a first in-place signal.
When the passive device is connected to the external interface 10, since there is no power supply in the passive device, a power supply voltage is not output to the external interface 10 and the controlled terminal of the first switch unit 111, and the first switch unit 111 is in an off state, and the second terminal of the first switch unit 111 outputs a high level based on the power supply of the first voltage source, and the first bit signal cannot be obtained at this time. Similarly, when the external interface 10 is not connected to an external device, the first switch unit 111 is in an off state, and the second terminal of the first switch unit 111 outputs a voltage matched with the voltage under the first voltage source, so that the first on-bit signal cannot be obtained.
As illustrated in fig. 3, the first switching unit 111 includes a first resistor R29, a first switching tube Q1, a zener diode D4, a first capacitor C28, and a second resistor R30. The controlled end of the first switching tube Q1 is connected to the external interface 10 through a first resistor R29, the first end of the first switching tube Q1 is used as the first end of the first switching unit 111 for grounding, and the controlled end of the first switching tube Q1 receives the first input voltage nsign 1 through the first resistor R29. The second end of the first switching tube Q1 is used as the second end of the first switching unit 111, and is used for being connected with the first voltage source VDD3V3 and the first end of the first filtering unit 112. The zener diode D4 is connected between the controlled end and the first end of the first switching tube Q1, and the first capacitor C28 and the second resistor R30 are both connected in parallel with the zener diode D4.
The first resistor R29 is a limiting resistor, and the zener diode D4, the first capacitor C28, and the second resistor R30 are all configured to stabilize the first input voltage. The first capacitor C28 is further configured to delay the first input voltage by a first duration based on a time required for charging the first capacitor C28, the first duration being related to the time required for charging the first capacitor C28. The output voltage of the first voltage source VDD3V3 may be determined according to practical situations, for example, 3.3V. The first switching transistor Q1 may be a triode, for example, a base (B) pole of the triode is used as a controlled terminal of the first switching transistor Q1, an emitter (E) pole of the triode is used as a first terminal of the first switching transistor Q1, and a collector (C) pole of the triode is used as a second terminal of the first switching transistor Q1.
It is understood that, in order to delay the first input voltage for the first duration, the first switching unit 111 may further include a capacitor other than the first capacitor C28. As shown in fig. 3, the first switch unit 111 may further include a capacitor C27, where the capacitor C27 is connected in parallel with the first capacitor C28, and the first input voltage can be accurately delayed for a first duration through the capacitor C27 and the first capacitor C28.
As illustrated in fig. 3, the first switching unit 111 may further include a pull-up resistor R27, a first terminal of the pull-up resistor R27 is connected to the first voltage source VDD3V3, and a second terminal of the pull-up resistor R27 is connected to the second terminal of the first switching tube Q1. The pull-up resistor R27 stabilizes the first level signal output from the second terminal of the first switching tube Q1.
Illustratively, as shown in FIG. 3, the first filter unit 112 includes a resistor R28 and a capacitor C29. The first end of the resistor R28 is used as the first end of the first filtering unit 112, connected to the second end of the first switching tube Q1 and the first voltage source VDD3V3, and the second end of the resistor R28 is used as the second end of the first filtering unit 112, and is used for outputting the first bit signal iparallelepackcheck 1. The first end of the capacitor C29 is connected to the second end of the resistor R28, and the second end of the capacitor C29 is grounded AGND.
In an embodiment, as shown in fig. 4, the second bit detection circuit 120 includes an anti-reflection unit 121, a second switch unit 122, and a second filter unit 123. The output end of the anti-reflection unit 121 is connected to the external interface 10, the input end of the anti-reflection unit 121 is connected to the controlled end of the second switch unit 122, the first end of the second switch unit 122 is used for being connected to a second voltage source (not shown in the figure), the second end of the second switch unit 122 is connected to the first end of the second filter unit 123, and the second end of the second filter unit 123 is connected to the second input end of the controller 130.
Wherein, the anti-reflection unit 121 is used for unidirectional conduction of the second input voltage; the second switching unit 122 is configured to be turned on when receiving the second input voltage, so as to output the output voltage of the second voltage source as a second level signal. The second filtering unit 123 is configured to filter the second level signal to obtain a second bit signal.
When the passive device is connected to the external interface 10, a ground signal is output to the external interface 10, for example, the external interface 10 is connected to the power negative electrode of the passive device through the connection wire of the passive device, which is equivalent to ground. When the ground signal is transferred to the anti-reflection unit 121 as the second input voltage, the second switch unit 122 is turned on, so that the second voltage source outputs the second level signal to the second filter unit 123 through the second switch unit 122, that is, the output voltage of the second voltage source is output to the second filter unit 123 as the second level signal, so that the second filter unit 123 filters the second level signal to obtain the second in-place signal, and the second in-place signal is the high level signal.
It should be noted that, when the active device is connected to the external interface 10, a power supply voltage is output to the external interface 10, and when the power supply voltage is transmitted as a first input voltage to the anti-reflection unit 121, the anti-reflection unit 121 is used for unidirectional conduction of the second input voltage, so that the first input voltage cannot pass through the anti-reflection unit 121, that is, the anti-reflection unit 121 can prevent the first input voltage from being connected to the second switch unit 122, thereby protecting the second switch unit 122, the second switch unit 122 does not output the second level signal, and the second filter unit 123 cannot output the second in-place signal. Similarly, when the external interface 10 is not connected to an external device, the second switch unit 122 is in the off state, and the second terminal of the second switch unit 122 outputs a low level, so that the second on-bit signal cannot be obtained.
Illustratively, as shown in fig. 5, the anti-reflection unit 121 includes an anti-reflection diode D88 and a fourth resistor R316; the negative (K) pole of the anti-reflection diode D88 is used as the output terminal of the anti-reflection unit 121, the positive (a) pole of the anti-reflection diode D88 is connected to the first terminal of the fourth resistor R316, and the second terminal of the fourth resistor R316 is used as the input terminal of the anti-reflection unit 121. The anti-reflection diode D88 is used for unidirectional conduction of the second input voltage nsign 2, and the anti-reflection diode D88 can prevent the first input voltage input by the active device from being connected to the second switch unit 122, thereby playing a protection role.
As illustrated in fig. 5, the second switching unit 122 includes a second switching transistor Q25, a second capacitor C211, and a third resistor R315. The controlled end of the second switching tube Q25 is used as the controlled end of the second switching unit 122, and the first end of the second switching tube Q25 is used as the first end of the second switching unit 122 for connecting the second voltage source VDD3V3. A second terminal of the second switching tube Q25 is connected to the first terminal of the second filter unit 123 as a second terminal of the second switching unit 122. The second capacitor C211 is connected between the controlled end and the first end of the second switching tube Q25, and the third resistor R315 is connected in parallel with the second capacitor C211.
The second capacitor C211 and the third resistor R315 are used for stabilizing the output voltage of the second voltage source VDD3V3. The output voltage of the second voltage source VDD3V3 may be determined according to practical situations, for example, 3.3V. The second switching transistor Q25 may be a transistor, for example, a base (B) pole of the transistor is used as a controlled terminal of the first switching transistor Q1, an emitter (E) pole of the transistor is used as a first terminal of the second switching transistor Q25, and a collector (C) pole of the transistor is used as a second terminal of the second switching transistor Q25.
The second filtering unit 123 includes a resistor R102, a resistor R104, and a capacitor C212, for example. The first end of the resistor R102 is used as the first end of the second filter unit 123, connected to the second end of the second switch Q25, and the second end of the resistor R102 is used as the second end of the second filter unit 123, for outputting the second bit signal iparalle bpcheck2. A first end of the resistor R104 is connected to a first end of the resistor R102, and a second end of the resistor R104 is grounded AGND. The first end of the capacitor C212 is connected to the second end of the resistor R102, and the second end of the capacitor C212 is grounded AGND.
In one embodiment, as shown in fig. 6, the control circuit 100 of the battery pack further includes a communication circuit 140, and the communication circuit 140 is connected between the external interface 10 and the controller 130; the controller 130 is used for communicating with external devices via a communication line 140. The communication line 140 may include a CAN communication line, but may be other communication lines. For example, when the external device is connected to the external interface 10, the controller 130 performs CAN communication with the external device through a CAN communication line, thereby completing the parallel operation logic.
In an embodiment, as shown in fig. 7, the control circuit 100 of the battery pack further includes a pre-discharge circuit 150 and a main discharge circuit 160, where the pre-discharge circuit 150 and the main discharge circuit 160 are connected between the external interface 10 and the electric energy storage unit 20. The controller 130 is also connected to the pre-discharge circuit 150 and the main discharge circuit 160.
The battery pack includes an electrical energy storage unit 20, for example, a battery, and the electrical energy storage unit 20 is used to supply power to an external device through the pre-discharge circuit 150 or the main discharge circuit 160. The controller 130 is configured to establish communication with the active device via the communication line 140 and power the active device via the main discharging circuit 160 when receiving the first bit signal. The controller 130 is further configured to supply power to the passive device through the pre-discharge circuit 150 when receiving the second bit signal, and to supply power to the passive device through the main discharge circuit 160 after establishing communication with the passive device through the communication line 140.
In the present utility model, the pre-discharge circuit 150 is provided with a related prevention resistor, prevention switch or other components, and the prevention resistor is used for limiting the voltage output by the electric energy storage unit 20 when the prevention switch is turned on, and then outputting the voltage to the external device through the external interface 10. The main discharging circuit 160 may be provided with only a relevant on switch, and by controlling the on switch to be turned on, the voltage output by the electric energy storage unit 20 may be directly output to the external device through the external interface 10. Where the main discharge circuit 160 also includes a resistor or other element, the resistor on the main discharge circuit 160 is less than the pre-discharge resistor on the pre-discharge circuit 150.
For example, the energy storage device is an active device, when the energy storage device is connected to the external interface 10, the controller 130 receives the first in-place signal, determines that the hardware in-place signal is valid, establishes communication with the energy storage device through the communication line 140, and after handshake is successful, the software in-place signal is valid. When the software/hardware bit signals are simultaneously active, the energy storage device is powered through the main discharge circuit 160, thereby completing the parallel logic with the energy storage device.
For example, when the base station is a passive device and the base station is connected to the external interface 10, the controller 130 receives the second in-place signal, and determines that the hardware in-place signal is valid, then the power is supplied to the base station through the pre-amplifier circuit 150 (no power supply is provided in the base station, so that the pre-discharge is required to start the base station), and after the communication is established with the base station through the communication line 140, the handshake is successful, the software in-place signal is valid. When the soft/hard bit signals are simultaneously active, the base station is powered through the main discharge circuit 160, thereby completing the combining logic with the base station.
The control circuit 100 of the battery pack in the above embodiment includes a first in-place detection circuit 110, a second in-place detection circuit 120, and a controller 130, where the first in-place detection circuit 110 is connected to the external interface 10 of the battery pack, and is configured to output a first in-place signal after delaying for a first duration when receiving a first input voltage through the external interface 10; the second in-place detection circuit 120 is connected to the external interface 10, and is configured to output a second in-place signal when receiving a second input voltage through the external interface 10, where the first input voltage is greater than the second input voltage, and the levels of the first in-place signal and the second in-place signal are opposite; the controller 130 is connected to the first bit detection circuit 110 and the second bit detection circuit 120; the controller 130 is configured to confirm that an external device connected to the external interface 10 is an active device when receiving the first in-place signal, and to confirm that the external device is a passive device when receiving the second in-place signal. When the external device connected to the external interface 10 is an active device, the first in-place detection circuit 110 receives the first input voltage and outputs a first in-place signal, and when the external device connected to the external interface 10 is a passive device, the second in-place detection circuit 120 receives the second input voltage and outputs a second in-place signal, so that the controller 130 can accurately determine the device type of the external device according to the first in-place signal or the second in-place signal, thereby greatly improving the identification accuracy of the external device connected to the battery pack as the active device or the passive device.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a battery pack according to an embodiment of the utility model.
As shown in fig. 8, the battery pack 300 includes:
an external interface 310, wherein the external interface 310 is used for connecting with external equipment;
at least one electrical energy storage unit 320;
the control circuit 330 of the battery pack according to the above embodiment, the control circuit 330 of the battery pack is connected between the external interface 310 and the electric energy storage unit 320, and the control circuit 330 of the battery pack is used for identifying the external device.
Wherein the electrical energy storage unit 320 is, for example, one or more batteries. The batteries can be connected in series and parallel to form a battery module. The external interface 310 may be the external interface 10 described in the above embodiment, the control circuit 330 of the battery pack may be the control circuit 100 of the battery pack described in the above embodiment, and the electrical energy storage unit 320 may be the electrical energy storage unit 20 described in the above embodiment.
The battery pack may also be referred to as a power-up pack or battery slave pack, which in some embodiments may also be a master pack or other energy storage device. The external devices include active devices, such as energy storage devices or other electronic devices carrying a power supply, and passive devices, which refer to devices that are capable of providing a power supply to perform a power supply function. Passive devices refer to devices that cannot provide power to meet power requirements, such as base stations, converters, filters, and the like.
The control circuit 330 of the battery pack further includes a pre-discharge circuit and a main discharge circuit, which are both connected between the external interface 310 and the electric energy storage unit 320. The control circuit 330 of the battery pack further comprises a controller and a communication circuit, wherein the controller is connected with the pre-discharge circuit and the control end of the main discharge circuit, and the communication circuit is connected between the external interface and the controller. The controller is used for establishing communication with the active equipment through the communication line when receiving the first in-place signal, and supplying power to the active equipment through the main discharging circuit. The controller is also used for supplying power to the passive device through the pre-amplifying circuit when the second in-place signal is received, and supplying power to the passive device through the main discharging circuit after communication is established with the passive device through the communication line.
In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (10)

1. The control circuit of the battery pack is characterized in that the battery pack comprises an external interface, and the external interface is used for connecting external equipment; the control circuit includes:
the first in-place detection circuit is connected with the external interface and is used for outputting a first in-place signal after delaying for a first duration when receiving a first input voltage through the external interface;
the second in-place detection circuit is connected with the external interface and is used for outputting a second in-place signal when receiving a second input voltage through the external interface, wherein the first input voltage is larger than the second input voltage, and the levels of the first in-place signal and the second in-place signal are opposite;
the controller is connected with the first in-place detection circuit and the second in-place detection circuit; the controller is used for confirming that the external device is an active device when the first in-place signal is received, and is used for confirming that the external device is a passive device when the second in-place signal is received.
2. The control circuit of claim 1, wherein the first in-bit detection circuit comprises a first switching unit and a first filtering unit;
the controlled end of the first switch unit is connected with the external interface, the first end of the first switch unit is grounded, the second end of the first switch unit is connected with the first end of the first filter unit, and the second end of the first switch unit is also used for being connected with a first voltage source;
the second end of the first filtering unit is connected with the first input end of the controller;
the first switch unit is used for being turned on after delaying the first time length when receiving the first input voltage so as to output a first level signal through a second end of the first switch unit; the first filtering unit is configured to filter the first level signal to obtain the first bit signal.
3. The control circuit of claim 2, wherein the first switching unit comprises a first resistor, a first switching tube, a zener diode, a first capacitor, and a second resistor;
the controlled end of the first switching tube is connected with the external interface through the first resistor, the first end of the first switching tube is used as the first end of the first switching unit, and the second end of the first switching tube is used as the second end of the first switching unit;
the voltage stabilizing diode is connected between the controlled end and the first end of the first switching tube, and the first capacitor and the second resistor are connected with the voltage stabilizing diode in parallel.
4. The control circuit of claim 3, wherein the first switching unit further comprises a pull-up resistor, a first end of the pull-up resistor being coupled to the first voltage source, and a second end of the pull-up resistor being coupled to the second end of the first switching tube.
5. The control circuit of claim 1, wherein the second in-place detection circuit comprises an anti-reflection unit, a second switching unit, and a second filtering unit;
the output end of the anti-reflection unit is connected with the external interface, the input end of the anti-reflection unit is connected with the controlled end of the second switch unit, the first end of the second switch unit is used for being connected with a second voltage source, the second end of the second switch unit is connected with the first end of the second filter unit, and the second end of the second filter unit is connected with the second input end of the controller;
the second switch unit is used for being conducted when the second input voltage is received through the anti-reflection unit, so that the output voltage of the second voltage source is output as a second level signal; the second filtering unit is configured to filter the second level signal to obtain the second bit signal.
6. The control circuit of claim 5, wherein the second switching unit comprises a second switching tube, a second capacitor, and a third resistor;
the controlled end of the second switching tube is used as the controlled end of the second switching unit, the first end of the second switching tube is used as the first end of the second switching unit, and the second end of the second switching tube is used as the second end of the second switching unit;
the second capacitor is connected between the controlled end and the first end of the second switch tube, and the third resistor is connected with the second capacitor in parallel.
7. The control circuit of claim 5, wherein the anti-reflection unit comprises an anti-reflection diode and a fourth resistor; the cathode of the anti-reflection diode is used as the output end of the anti-reflection unit, the anode of the anti-reflection diode is connected with the first end of the fourth resistor, and the second end of the fourth resistor is used as the input end of the anti-reflection unit.
8. The control circuit of any one of claims 1-7, further comprising a communication line connected between the external interface and the controller;
the controller is used for communicating with the external equipment through the communication line.
9. The control circuit of claim 8, further comprising a pre-discharge circuit and a main discharge circuit, both connected between the external interface and the electrical energy storage unit;
the controller is also connected with the pre-discharge circuit and the main discharge circuit, and is further used for supplying power to the passive equipment through the pre-discharge circuit when the second in-place signal is received, and supplying power to the passive equipment through the main discharge circuit after communication is established between the controller and the passive equipment through the communication circuit.
10. A battery pack, comprising:
at least one electrical energy storage unit;
the external interface is used for connecting external equipment;
the control circuit of any one of claims 1-9, connected between the electrical energy storage unit and the external interface, the control circuit being configured to identify the external device.
CN202223188378.8U 2022-11-29 2022-11-29 Control circuit of battery pack and battery pack Active CN219873666U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223188378.8U CN219873666U (en) 2022-11-29 2022-11-29 Control circuit of battery pack and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223188378.8U CN219873666U (en) 2022-11-29 2022-11-29 Control circuit of battery pack and battery pack

Publications (1)

Publication Number Publication Date
CN219873666U true CN219873666U (en) 2023-10-20

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