CN214045072U - Battery pack charging protection circuit, battery pack charging protection system and electrical device - Google Patents
Battery pack charging protection circuit, battery pack charging protection system and electrical device Download PDFInfo
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- CN214045072U CN214045072U CN202022378244.7U CN202022378244U CN214045072U CN 214045072 U CN214045072 U CN 214045072U CN 202022378244 U CN202022378244 U CN 202022378244U CN 214045072 U CN214045072 U CN 214045072U
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Abstract
The utility model is suitable for a charge protection technical field provides a battery pack charge protection circuit, a battery pack charge protection system and an electrical apparatus, the protection circuit is connected with an electric core and a charging device to form a charging loop, the protection circuit comprises a first charge switch and a first controller, the first charge switch is connected between the electric core and the charging device, and the first controller drives the connection between the electric core and the charging device to be disconnected or closed; the second charging switch is driven by the second controller to open or close the connection between the battery cell and the charging equipment; and the first controller detects the charging state of the battery cell in real time and outputs a charging signal according to the charging state, and the signal conversion module transmits the charging signal to the second controller so that the second controller drives the second charging switch to be switched off or switched on. The circuit can send a charging signal to the charging equipment, so that the charging equipment can control the on-off of a loop between the charging equipment and the battery pack, and potential safety hazards are reduced.
Description
Technical Field
The utility model belongs to the technical field of the battery package protection of charging, especially, relate to a battery package protection circuit, battery package protection system and electrical apparatus that charges.
Background
With the development of science and technology, more and more users use the electrical equipment who carries the battery package, wherein for the effective control of realization to battery package charge-discharge, add BMS in the battery package usually for can detect and control current-voltage and temperature when charging, realize the effective protection to the battery package. In an existing battery pack system, in a charging and discharging process of a battery core, only the electric quantity condition of the battery core can be automatically identified inside the battery pack, so that a first charging switch is controlled to permit an external device (such as charging equipment) to charge or discharge the battery core. However, with such a control system, the external device cannot acquire the charging state of the electric core in the battery pack, that is, after the first charging switch in the battery pack is turned off, the external device may continuously maintain the charging state of the electric core even when the external device cannot acquire the charging state of the electric core, so that a potential safety hazard is easily generated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery package charge protection circuit aims at solving the external equipment and also can continuously keep the state of charge to electric core under the unable state of charge who acquires electric core's the condition to produce the potential safety hazard problem easily.
The utility model discloses a realize like this, a battery package charge protection circuit is connected and forms charging circuit with electric core, battery charging outfit, include:
the first charging switch is connected between the battery cell and the charging equipment, and is driven by the first controller to open or close the connection between the battery cell and the charging equipment;
the second charging switch is connected between the battery cell and the charging equipment, and the second controller is used for driving the connection between the battery cell and the charging equipment to be opened or closed;
the signal conversion module is connected with the first controller and the second controller, the first controller detects the charging state of the battery cell in real time and outputs a charging signal according to the charging state, and the signal conversion module transmits the charging signal to the second controller so that the second controller drives the second charging switch to be switched on or switched off.
Further, the first charging switch and the signal conversion module are connected to the same end of the first controller.
Furthermore, the signal conversion module comprises a signal conversion unit, a first end of the signal conversion unit is connected with the output end of the first controller, a second end of the signal conversion unit is connected with the signal end of the second controller, and a third end of the signal conversion unit is connected with the grounding end of the second controller.
Furthermore, the signal conversion module further comprises a voltage stabilizing unit, wherein one end of the voltage stabilizing unit is connected to the input end of the signal conversion unit, and the other end of the voltage stabilizing unit is connected to the negative electrode of the battery pack.
Further, the signal conversion module further comprises a temperature detection unit, and the temperature detection unit is connected between the signal conversion unit and the second controller.
Furthermore, a first end of the second charging switch is connected with an output end of the second controller, a second end of the second charging switch is connected with a power module of the charging device, and a third end of the second charging switch is connected with the anode of the battery cell.
Further, the second charging switch comprises a conversion driving module and a switch module, the switch module is connected to the positive terminal of the charging device, and the conversion driving module is connected to the switch module and the output end of the second controller.
Further, the second charging switch is an isolating switch.
The utility model also provides a battery pack charging protection system, which comprises a battery pack, a charging device and a battery pack charging protection circuit;
the second charging switch and the second controller are both arranged in the charging equipment;
the battery core, the first controller, the signal conversion unit and the first charging switch are arranged in the battery pack;
the charging equipment is provided with a positive electrode end interface, a negative electrode end interface and a signal end interface, and the signal conversion unit is connected with the second controller through the signal end interface.
The utility model also provides an electrical apparatus, including aforementioned battery package charging protection system.
The beneficial effects of the utility model reside in that, through setting up signal conversion module, so that first controller is when the charged state output charge signal according to electric core, wherein, the charge signal includes chargeable signal and non-chargeable signal, signal conversion module is simultaneously with charge signal delivery for the second controller so that the second controller is according to the charge signal of receipt and then control the break-make of second charge switch, thereby realize that battery charging outfit can cut off the return circuit between battery charging outfit and the electric core when electric core non-chargeable state, thereby reduce the production of potential safety hazard.
Drawings
Fig. 1 is a block diagram illustrating a charging protection circuit for a battery pack according to an embodiment of the present invention;
fig. 2 is a circuit diagram of the battery pack internal circuit of the battery pack charging protection circuit according to an embodiment of the present invention;
fig. 3 is an internal circuit diagram of a charging device of a battery pack charging protection circuit according to an embodiment of the present invention;
fig. 4 is a structural diagram of a conversion unit module of a battery pack charging protection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model discloses a set up signal conversion module to make first controller when the charged signal is exported according to the state of charge of electric core, wherein, the charged signal includes chargeable signal and non-chargeable signal, signal conversion module is carried the charged signal simultaneously for the second controller so that the second controller is according to the charged signal of receipt and then control the break-make of second charge switch, thereby realize that battery charging outfit can cut off the return circuit between battery charging outfit and the electric core when electric core non-chargeable state, thereby reduce the production of potential safety hazard.
Example one
Referring to fig. 1 to 3, an embodiment of the present invention provides a battery pack charging protection circuit, which is connected to an electrical core 101 and a charging device and forms a charging loop, the protection circuit includes a first charging switch and a first controller 102, the first charging switch 103 is connected between the electrical core 101 and the charging device, and the first controller 102 is driven to disconnect or close the connection between the electrical core and the charging device; a second charging switch 202 and a second controller 201, wherein the second charging switch 202 is connected between the battery cell 101 and the charging equipment and is driven by the second controller 201 to open or close the connection between the battery cell and the charging equipment. The signal conversion module 30 is connected to the first controller 102 and the second controller 201, the first controller 102 detects the charging state of the battery cell 101 in real time and outputs a charging signal according to the charging state, and the signal conversion module 30 transmits the charging signal to the second controller 201 so that the second controller 201 drives the second charging switch 202 to be turned on or off.
In the present embodiment, the charging signal includes a chargeable signal and a non-chargeable signal.
The embodiment of the utility model provides a through setting up signal conversion module to make first controller 102 when the charged signal is exported according to the charged state of electric core 101, wherein, the charged signal guarantees including chargeable signal and non-chargeable signal, signal conversion module 30 is carried the charged signal simultaneously for second controller 201 so that second controller 201 is according to the charged signal of receipt and then control the break-make of second charge switch 202, thereby realize that the battery charging outfit can cut off the return circuit between battery charging outfit and the electric core when electric core non-chargeable state, thereby reduce the production of potential safety hazard.
The utility model provides a battery package charge protection circuit can send the charge signal to battery charging outfit 20 through signal conversion module 30 to make battery charging outfit 20 can control the break-make in return circuit between battery charging outfit 20 and the battery package 10 according to the charge signal, control battery charging outfit 20 that can be nimble has reduced the potential safety hazard to the charged state of electric core 101 in the battery package 10.
Specifically, a first end of the first charging switch 103 is connected to an output end of the first controller 102, a second end is connected to a negative electrode of the battery cell 101, and a third end is connected to the charging device 20. The first controller 102 controls the first charging switch 103 to be turned on or turned off according to the state of the battery cell 101, and the signal conversion module 30 recognizes a chargeable signal of the battery cell 101 according to the turning-on control of the first controller 102 on the first charging switch 103, converts the chargeable signal and sends the converted signal to the second controller 201, so that the second controller 201 controls the second charging switch 202 to be turned on or off.
In this embodiment, the first charging switch 103 may adopt a first MOS transistor Q1, a first end of the first MOS transistor Q1 is connected to the output end of the first controller 102, a second end of the first MOS transistor Q1 is connected to the negative electrode of the battery cell 101, and a third end of the first MOS transistor Q1 is connected to the charging device 20, where the first end is a gate, the second end is a drain, and the third end is a source.
During operation, when the first controller 102 outputs a low level to the first MOS transistor Q1, the first MOS transistor Q1 is not turned on, at this time, the charging loop of the battery cell 101 is cut off, the charging signal received by the signal conversion module 30 is an uncharged signal, the signal conversion module 30 sends the uncharged signal to the second controller 201, and the second controller 201 controls the second charging switch 202 to be turned off, so as to control the charging device 20 not to charge the battery cell 101; when the first controller 102 outputs a high level to the first MOS transistor Q1, the first MOS transistor Q1 is turned on, at this time, the charging loop of the battery cell 101 is turned on, the signal conversion module 30 receives that the charging signal is a chargeable signal, the signal conversion module 30 sends the chargeable signal to the second controller 201, and the second controller 201 controls the second charging switch 202 to be turned on, so as to control the charging device 20 to charge the battery cell 101.
Further, the signal conversion module 30 and the first charging switch 103 share the same terminal, i.e. the same output terminal, of the first controller 102, so that the signal conversion unit 301 can synchronously receive the control signal of the first controller 102 to the first charging switch 103, on one hand, the required amount of the first controller 102 pin can be reduced to reduce the cost, and on the other hand, the reliability of the signal conversion unit receiving the charging signal can be ensured.
Example two
Referring to fig. 4, in the first embodiment, specifically, the signal conversion module 30 includes a signal conversion unit 301, a first terminal of the signal conversion unit 301 is connected to the output terminal of the first controller 102, a second terminal of the signal conversion unit 301 is connected to the signal terminal of the second controller 201, and a third terminal of the signal conversion unit 301 is connected to the ground terminal of the second controller 201.
In this embodiment, specifically, the signal conversion unit 301 employs a second MOS transistor Q2, a first terminal of the second MOS transistor Q2 is connected to the output terminal of the first controller 102, a second terminal is connected to the signal terminal of the second controller 201, and a third terminal is connected to the ground terminal of the second controller 201, where the first terminal is a gate, the second terminal is a drain, and the third terminal is a source.
In operation, when the first controller 102 outputs a low level to the first MOS transistor Q1, the first MOS transistor Q1 is not turned on, and the second MOS transistor Q2 is also not turned on, at this time, the second controller 201 detects that the on signal of the second MOS transistor Q2 is not detected, that is, it detects that the first resistor R1 is clamped at a high level in fig. 3), and the second controller 20 obtains that the battery cell 101 is in a non-charging state at this time, so as to control the second charging switch 202 to be turned off, so as to turn off the charging of the battery cell 101 by the charging device 20; when the first controller 102 outputs a high level to the first MOS transistor Q1, the first MOS transistor Q1 is turned on, the second MOS transistor Q2 is also turned on at the same time, the second controller 201 detects a level signal of the second MOS transistor Q2 at this time, and the second controller 201 obtains that the battery cell 101 is in a chargeable state at this time, so as to control the second charging switch 202 to be turned on, so as to turn on the charging device 20 to charge the battery cell 101.
Further, the signal conversion module 30 further includes a voltage stabilizing unit 302, one end of the voltage stabilizing unit 302 is connected to the input end of the signal conversion unit 301, and the other end is connected to the negative electrode of the charging device 20, and the voltage stabilizing unit 302 can protect the signal conversion unit 301 to prevent the signal conversion unit 301 from being broken down by overvoltage. Specifically, the voltage regulator unit 302 may employ a first zener diode Z1.
Further, the signal conversion module 30 further includes a temperature detection unit 303, and the temperature detection unit 303 is connected between the signal conversion unit 301 and the second controller 201. The temperature detection unit 303 may detect the temperature of the battery cell 101 and feed the temperature back to the second controller 201, so that the second controller 201 controls the charging device 20 not to charge the battery cell 101 when the temperature is too high or too low, thereby improving the safety performance of the battery pack 10.
Specifically, the temperature detecting unit 303 may employ a thermistor RT2, so as to achieve the purpose of detecting the temperature, and also perform current limiting on the signal converting unit 301 to achieve the purpose of protecting the signal converting unit.
EXAMPLE III
Referring to fig. 3, in the embodiment 1 or the second embodiment, specifically, a first end of the second charging switch 202 is connected to an output end of the second controller 201, a second end is connected to a power module of the charging device 20, and a third end is connected to the positive electrode of the battery cell 101. Further, the second charging switch 202 includes a conversion driving module 2021 and a switch module 2022, the switch module 2022 is connected to the positive terminal of the charging device 20, the conversion driving module 2021 is connected to the switch module 2022 and the output terminal of the second controller 201, and the conversion driving module 2021 is configured to convert the high voltage output by the second controller 201 into a low voltage suitable for the switch module 2022, thereby functioning to protect the switch module 2022.
In this embodiment, the conversion driving module 2021 includes a third MOS transistor Q3, a first terminal of the third MOS transistor Q3 is connected to the output terminal of the second controller 201, a second terminal is connected to the switching module 2022, and a third terminal is grounded, where the first terminal is a gate, the second terminal is a drain, and the third terminal is a source.
Further, the conversion driving module 2021 further includes a second resistor R2 and a third resistor R3, the second resistor R2 is connected between the first end of the third MOS transistor Q3 and the output end of the second controller 201, two ends of the third resistor R3 are respectively connected to the first end and the third end of the third MOS transistor Q3, and the second resistor R2 and the third resistor R3 divide and limit the voltage of the third MOS transistor Q3.
In this embodiment, the switch unit includes a fourth MOS transistor Q4, a first end of the fourth MOS transistor Q4 is connected to the conversion driving module 2021 (i.e., connected to the second end of the third MOS transistor Q3), a second end of the fourth MOS transistor Q4 is connected to the positive electrode of the battery cell 101, and a third end of the fourth MOS transistor Q4 is connected to the positive electrode of the charging device 20, where the first end is a gate, the second end is a drain, and the third end is a source.
Further, the switching unit further includes a fourth resistor R4, a fifth resistor R5 and a second zener diode Z2, the fourth resistor R3 is connected between the first end of the fourth MOS transistor Q4 and the switching driving unit, two ends of the fifth unit R5 are respectively connected to the first end and the third end of the fourth MOS transistor Q4, and two ends of the second zener diode Z2 are respectively connected to the first end and the third end of the fourth MOS transistor Q4. The fourth resistor R4, the fifth resistor R5 and the second zener diode Z2 are used for stabilizing, dividing and limiting the voltage of the fourth MOS transistor Q4.
Example four
In addition to the first embodiment or the second embodiment, the second charging switch 202 is an isolating switch. Specifically, the isolation unit may adopt a relay, the relay has a characteristic that a switch contact is physically insulated from the low-voltage electromagnetic coil, and the output end of the second controller 201 may control the low-voltage electromagnetic coil of the relay to control the second charging switch 202 to be turned on or off, so as to protect the second controller 201.
EXAMPLE five
The embodiment of the utility model provides a battery package charge protection system is still provided, including battery package 10, battery charging outfit 20 and battery package charge protection circuit, second charge switch 202, in battery charging outfit 20 was all located to second controller 201, in battery core 101, first controller 102, signal conversion unit 301 and first charge switch 103 were located battery package 10, battery charging outfit 20 was equipped with positive terminal interface, negative pole end interface and signal end interface, signal conversion unit 301 passes through the signal end interface and is connected with second controller 201.
The embodiment of the utility model provides a system is through setting up signal conversion module 30 in battery package 10 at battery package charge protection circuit so that first controller 102 is in the control first charge switch 103 break-make when realizing the control to the charged state of electric core 101, the signal of this break-make is received simultaneously to signal conversion module 30, but to the chargeable signal of electric core 101 or the signal of can not charging promptly, and convert this chargeable signal into the distinguishable signal of charging of second controller 201, thereby second controller 201 is according to the signal of charging of receipt, and then control second charge switch 202's break-make, thereby realize that battery charging outfit 20 can cut off the return circuit between battery charging outfit 20 and the electric core 101 when electric core 101 can not charged state, thereby reduce the production of potential safety hazard.
EXAMPLE six
The embodiment of the utility model provides an electrical apparatus is still provided, including aforementioned battery package charging protection system.
The embodiment of the utility model provides an electrical apparatus, through set up signal conversion module 30 in battery package 10 at battery package charge protection system so that first controller 102 is in the control first charge switch 103 break-make when realizing the control to the charged state of electric core 101, the signal of this break-make is received simultaneously to signal conversion module 30, but to the chargeable signal of electric core 101 or the signal of can not charging promptly, and convert this chargeable signal into the distinguishable signal of charging of second controller 201, thereby second controller 201 is according to the signal of charging of receiving, and then control second charge switch 202's break-make, thereby realize that battery charging outfit 20 can cut off the return circuit between battery charging outfit 20 and the electric core 101 when electric core 101 can not charged state, thereby reduce the production of potential safety hazard.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a battery package protection circuit that charges, is connected and forms charging circuit with electric core, battery charging outfit, its characterized in that includes:
the first charging switch is connected between the battery cell and the charging equipment, and is driven by the first controller to open or close the connection between the battery cell and the charging equipment;
the second charging switch is connected between the battery cell and the charging equipment, and the second controller is used for driving the connection between the battery cell and the charging equipment to be opened or closed;
the signal conversion module is connected with the first controller and the second controller, the first controller detects the charging state of the battery cell in real time and outputs a charging signal according to the charging state, and the signal conversion module transmits the charging signal to the second controller so that the second controller drives the second charging switch to be switched on or switched off.
2. The battery pack charging protection circuit of claim 1, wherein the first charging switch and the signal conversion module are commonly connected to the same terminal of the first controller.
3. The battery pack charging protection circuit according to claim 1 or 2, wherein the signal conversion module comprises a signal conversion unit, a first terminal of the signal conversion unit is connected to the output terminal of the first controller, a second terminal of the signal conversion unit is connected to the signal terminal of the second controller, and a third terminal of the signal conversion unit is connected to the ground terminal of the second controller.
4. The battery pack charging protection circuit of claim 3, wherein the signal conversion module further comprises a voltage stabilization unit, one end of the voltage stabilization unit is connected to the input end of the signal conversion unit, and the other end of the voltage stabilization unit is connected to the negative electrode of the battery pack.
5. The battery pack charge protection circuit of claim 3, wherein the signal conversion module further comprises a temperature detection unit connected between the signal conversion unit and the second controller.
6. The battery pack charging protection circuit of claim 1, wherein a first terminal of the second charging switch is connected to an output terminal of the second controller, a second terminal of the second charging switch is connected to a power module of the charging device, and a third terminal of the second charging switch is connected to a positive electrode of the battery cell.
7. The battery pack charging protection circuit of claim 6, wherein the second charging switch comprises a switch driving module and a switch module, the switch module is connected to the positive terminal of the charging device, and the switch driving module is connected to the switch module and the output terminal of the second controller.
8. The battery pack charge protection circuit of claim 6, wherein the second charge switch is an isolator switch.
9. A battery pack charge protection system comprising a battery pack, a charging device, and the battery pack charge protection circuit of any one of claims 1-8;
the second charging switch and the second controller are both arranged in the charging equipment;
the battery core, the first controller, the signal conversion unit and the first charging switch are arranged in the battery pack;
the charging equipment is provided with a positive electrode end interface, a negative electrode end interface and a signal end interface, and the signal conversion unit is connected with the second controller through the signal end interface.
10. An electrical device comprising the battery pack charge protection system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022378244.7U CN214045072U (en) | 2020-10-22 | 2020-10-22 | Battery pack charging protection circuit, battery pack charging protection system and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022378244.7U CN214045072U (en) | 2020-10-22 | 2020-10-22 | Battery pack charging protection circuit, battery pack charging protection system and electrical device |
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| Publication Number | Publication Date |
|---|---|
| CN214045072U true CN214045072U (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022378244.7U Active CN214045072U (en) | 2020-10-22 | 2020-10-22 | Battery pack charging protection circuit, battery pack charging protection system and electrical device |
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| Country | Link |
|---|---|
| CN (1) | CN214045072U (en) |
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- 2020-10-22 CN CN202022378244.7U patent/CN214045072U/en active Active
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