CN212572153U - Modularization lithium cell protection shield - Google Patents
Modularization lithium cell protection shield Download PDFInfo
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- CN212572153U CN212572153U CN202021588410.XU CN202021588410U CN212572153U CN 212572153 U CN212572153 U CN 212572153U CN 202021588410 U CN202021588410 U CN 202021588410U CN 212572153 U CN212572153 U CN 212572153U
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Abstract
The utility model relates to a lithium battery protection board field especially relates to a modularization lithium battery protection board. Comprises a first circuit board and a second circuit board; the first circuit board is provided with a signal acquisition circuit, the second circuit board is provided with a main control circuit, and the first circuit board and the second circuit board are electrically connected through a jumper wire; the main control circuit is arranged between the lithium battery and the load to realize the connection and disconnection between the lithium battery and the load, and the signal acquisition circuit monitors the voltage of the lithium battery and is in driving control connection with the main control circuit; the first circuit board and the second circuit board jointly realize the output protection of the lithium battery through the signal acquisition circuit and the main control circuit. This structure has increased the assembly convenience of lithium battery protection shield through this modularization circuit board, greatly reduced the spatial structure of lithium battery protection shield, widened its range of application, the electric interference between the components and parts of greatly reduced each module has effectively increased its reliability, has reduced the design degree of difficulty of lithium battery protection shield.
Description
Technical Field
The utility model relates to a lithium battery protection board field especially relates to a modularization lithium battery protection board.
Background
With the development of the lithium battery industry and the improvement of the living standard of people, the safety consciousness of people is improved, and the long-term development of the lithium battery protection plate is promoted. Nowadays, the requirements of users for lithium battery protection plates are higher and higher, and besides the function aspect, the space volume of equipment products of the users is smaller and smaller. Simultaneously, the function of lithium battery protection shield is also more and more, and in the current product, will integrate a plurality of functions on single PCB board usually, lead to the circuit board volume can be very big, and the design is big with the configuration degree of difficulty, need consider the electric interference between each module components and parts during the design, and later stage maintenance and change are also very inconvenient.
Disclosure of Invention
The utility model discloses a solve lithium battery circuit board bulky, the design degree of difficulty is big, uses and maintains inconvenient technical problem, provides a modularization lithium battery protection shield.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a modular lithium battery protection board comprises a first circuit board and a second circuit board; the first circuit board is provided with a signal acquisition circuit, the second circuit board is provided with a main control circuit, and the first circuit board and the second circuit board are electrically connected through a jumper wire; the main control circuit is arranged between the lithium battery and the load to realize the connection and disconnection between the lithium battery and the load, and the signal acquisition circuit monitors the voltage of the lithium battery and is in driving control connection with the main control circuit; the first circuit board and the second circuit board jointly realize the output protection of the lithium battery through the signal acquisition circuit and the main control circuit.
Further, the LED lamp also comprises a third circuit board; a USB output circuit is arranged on the third circuit board; the third circuit board is electrically connected with the second circuit board through a jumper wire, and the input end and the output end of the USB output circuit are respectively electrically connected with the output end and the USB port of the main control circuit.
Further, the USB output circuit comprises a DC-DC voltage reduction module, a detection module and a control module; the input end and the output end of the DC-DC voltage reduction module are respectively connected with the output end of the main control circuit and the USB port; the detection module is arranged between the USB port and the negative electrode of the lithium battery and is in control connection with the detection end of the control module; the control end of the control module is connected with the enabling end of the DC-DC voltage reduction module, the control module detects the access condition of the USB port through the detection module, and controls the connection and disconnection of the DC-DC voltage reduction module according to the access condition of the USB port.
Furthermore, a turn-off module and a wake-up module are arranged between the USB port and the negative electrode of the lithium battery of the USB output circuit; the turn-off module is in control connection with the control module and is used for realizing turn-off and communication between the USB ports according to the access condition of the USB ports; the wake-up module is connected with the wake-up end of the control module and used for sending a wake-up signal to the control module after the load of the USB port is connected, and further controlling the turn-off module and the DC-DC voltage reduction module to be turned on.
Furthermore, a plurality of detection ends of the signal acquisition circuit are arranged, and each detection end of the signal acquisition circuit is electrically connected with each potential of the lithium battery output circuit through the acquisition chip; and the control end of the signal acquisition circuit is connected with the enabling end of the main control circuit.
Furthermore, the main control circuit comprises an MOS tube group, the MOS tube group is arranged among the power supply end, the charging end and the load access end of the lithium battery, and the enabling end of the MOS tube group is in control connection with the control end of the signal acquisition circuit; the MOS tube group realizes the conduction and the disconnection among the power supply end, the charging end and the load access end of the lithium battery according to the control signal of the signal acquisition circuit.
Furthermore, the signal acquisition circuit further comprises a weak current switch, and an external power supply is in control connection with the enabling end of the signal acquisition circuit through the weak current switch.
Furthermore, each control port of the main control circuit is connected with each corresponding port of the signal acquisition circuit through a first jumper J3.
Further, the signal acquisition circuit comprises a signal acquisition chip; the signal acquisition chip comprises a power end, an enabling end, a detection end and a plurality of control ports, the power end of the signal acquisition chip is connected with an external power supply, the enabling end is connected with the external power supply through a weak current switch, the detection end is connected with each potential of the lithium battery through a jumper J4, and the control ports are connected with each port of the main control circuit through a first jumper J3.
Furthermore, the signal acquisition chip is an SH367007 chip.
The utility model discloses a separate lithium battery protection board for polylith circuit board according to its module function, carry out electric connection through the wire jumper between a plurality of module circuit boards, the function of lithium battery protection board is realized in the cooperation. This structure has increased the assembly convenience of lithium battery protection shield through this modularization circuit board, greatly reduced the spatial structure of lithium battery protection shield, widened its range of application. Meanwhile, in design, because each module circuit board is independent, the electrical interference between components of each module is greatly reduced, the reliability of the lithium battery protection board is effectively improved, and the design difficulty of the lithium battery protection board is reduced.
Drawings
Fig. 1 is a block diagram of a modular lithium battery protection board according to an embodiment of the present invention.
Fig. 2 is a circuit structure diagram of the signal acquisition circuit according to the embodiment of the present invention.
Fig. 3 is a circuit structure diagram of the signal acquisition circuit detection end connection jumper J4 according to the embodiment of the present invention.
Fig. 4 is a circuit connection diagram of a weak electric switch in a signal acquisition circuit according to an embodiment of the present invention.
Fig. 5 is a circuit structure diagram of the main control circuit according to the embodiment of the present invention.
Fig. 6 is a circuit structure diagram of the jumper J3 according to the embodiment of the present invention.
Fig. 7 is a circuit structure diagram of the USB output circuit according to the embodiment of the present invention.
Fig. 8 is a circuit structure diagram of a control module in a USB output circuit according to an embodiment of the present invention.
Wherein:
the first circuit board is 10, the signal acquisition circuit is 11, and the signal acquisition chip is 12;
the second circuit board is 20, the main control circuit is 21, and the MOS tube group is 22;
the third circuit board is 30, the USB output circuit is 31, the DC-DC voltage reduction module is 32, the detection module is 33, the control module is 34, the shutdown module is 35, and the wake-up module is 36.
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.
Examples
The embodiment provides a modular lithium battery protection board for protecting charging and discharging of a lithium battery, and specifically, referring to fig. 1 to 8, the lithium battery protection board includes a first circuit board 10 and a second circuit board 20, a signal acquisition circuit 11 is disposed on the first circuit board 10 for implementing a lithium battery signal acquisition function in the lithium battery protection board, and a main control circuit 21 is disposed on the second circuit board 20 for implementing on and off of the lithium battery, a load end and a charging port. In terms of structure, please refer to fig. 1, the first circuit board 10 and the second circuit board 20 are electrically connected by a jumper, wherein two ports of the main control circuit 21 on the second circuit board 20 are respectively located between the lithium battery and the load, and the load specifically includes a load end and a charging end. And in the aspect of signal acquisition circuit 11, it is mainly used for monitoring lithium cell voltage to be connected with main control circuit 21 drive control, during the use, signal acquisition circuit 11 judges according to the voltage of outside weak current switch and lithium cell key potential department whether control main control circuit 21 realizes switching on between lithium cell and load, and then, first circuit board 10 and second circuit board 20 realize the output protection of lithium cell jointly through signal acquisition circuit 11 and main control circuit 21.
In some embodiments, referring to fig. 1, the lithium battery protection board further includes a third circuit board 30, and the third circuit board 30 is provided with a USB output circuit 31, which is mainly used for providing a USB output port for a lithium battery. The third circuit board 30 is electrically connected to the second circuit board 20 through a jumper, and the input and output terminals of the USB output circuit 31 are electrically connected to the output terminal and the USB port of the main control circuit 21, respectively, so that the connection and disconnection between the USB port and the lithium battery are completed through the main control circuit 21 of the second circuit board 20.
Certainly, the USB output circuit 31 can be used to perform step-down output processing on the lithium battery, and meanwhile, has a control module 34 for determining whether there is a load connected, so as to implement the self-power-consumption shutdown of the third circuit board 30 when there is no load. Specifically, in some embodiments, as shown in fig. 7 and 8, the USB output circuit 31 includes a DC-DC voltage reduction module 32, a detection module 33, and a control module 34. In the aspect of the structure, the input end and the output end of the DC-DC voltage reduction module 32 are respectively connected to the output end of the main control circuit 21 and the USB port.
In terms of self-power-consumption shutdown, the detection module 33 is disposed between the USB port and the negative electrode of the lithium battery, and is in control connection with the detection end of the control module 34, and is configured to detect the voltage of the USB port and feed the detected voltage back to the control module 34. On the other hand, the control terminal of the control module 34 is connected to the enable terminal of the DC-DC voltage reduction module 32, and the control module 34 detects the access condition of the USB port through the detection module 33 and controls the DC-DC voltage reduction module 32 to be turned on or off according to the access condition of the USB port.
More preferably, the USB output circuit 31 is further provided with a turn-off module 35 and a wake-up module 36 between the USB port and the negative electrode of the lithium battery, wherein the turn-off module 35 is in control connection with the control module 34, and is configured to turn off and communicate the USB port according to the access condition of the USB port. Specifically, the turn-off module 35 is connected in series between the USB port and the detection module 33, the turn-off module 35 is in control connection with the control module 34, and when the control module 34 detects that the USB port is not loaded through the detection module 33, the turn-off module 35 is turned off, so that the whole circuit is in low power consumption when not in operation, and the problem of high power consumption of the USB output circuit is solved. More specifically, in this embodiment, the turn-off module 35 is specifically an MOS transistor, a gate of the MOS transistor is connected to the control block, and a source and a drain of the MOS transistor are respectively connected to a negative electrode of the USB port and a negative electrode of the lithium battery.
In the aspect of the wake-up module 36, it is connected to the wake-up end of the control module 34, and is configured to send a wake-up signal to the control module 34 after the USB port load is connected, so as to control the turn-on of the turn-off module 35 and the DC-DC voltage reduction module 32. Specifically, one end of the wake-up module 36 is connected to the wake-up power source through the USB port, and the other end is grounded, when the load is connected, the wake-up module 36 is powered on, the wake-up module 36 is activated, and the connection condition of the USB port is fed back to the control module 34 through the wake-up end.
It should be noted that, in the present embodiment, the DC-DC voltage reduction module 32 includes a voltage reduction chip, and the voltage reduction chip adopts an XL7046 chip. The control module 34 includes a control chip that employs an STM8S003F chip.
The benefit of this embodiment lies in, this structure is through separating lithium battery protection board for the polylith circuit board according to its module function, carries out electric connection through the wire jumper between a plurality of module circuit boards, and the function of lithium battery protection board is realized in the cooperation. This structure has increased the assembly convenience of lithium battery protection shield through this modularization circuit board, greatly reduced the spatial structure of lithium battery protection shield, widened its range of application. Meanwhile, in design, because each module circuit board is independent, the electrical interference between components of each module is greatly reduced, the reliability of the lithium battery protection board is effectively improved, and the design difficulty of the lithium battery protection board is reduced.
In terms of the signal acquisition circuit 11, as shown in fig. 2 to 4, in some embodiments, a plurality of detection ends of the signal acquisition circuit 11 are provided, and each detection end of the signal acquisition circuit 11 is electrically connected to each potential of the lithium battery output circuit through an acquisition chip or a jumper wire, so as to acquire the voltage of the lithium battery and monitor whether the voltage abnormality occurs in real time. Meanwhile, the control end of the signal acquisition circuit 11 is connected with the enable end of the main control circuit 21, and whether the main control circuit 21 conducts large current or not is controlled according to the closing condition of the weak current switch and the abnormal condition of the lithium battery voltage. In the present embodiment, each detection terminal of the signal acquisition circuit 11 is electrically connected to each key potential of the lithium battery output circuit through the jumper J4.
Preferably, as shown in fig. 4, the signal acquisition circuit 11 further includes a weak current switch, the external power source end is connected to the enable end of the signal acquisition circuit 11 through the weak current switch, and the user can control the output of the lithium battery according to the on/off mode of the external control weak current switch. More preferably, the signal acquisition circuit 11 includes a signal acquisition chip 12, the signal acquisition chip 12 includes a power end, an enable end, a detection end and a plurality of control ports, the power end of the signal acquisition chip 12 is connected with an external power supply, the enable end is connected with the external power supply through a weak current switch, the detection end is connected with each potential of the lithium battery through a jumper J4, and the control ports are connected with each port of the main control circuit 21 through a first jumper J3. In this embodiment, the signal acquisition chip 12 is an SH367007 chip.
In terms of the main control circuit 21, as shown in fig. 5 and 6, in some embodiments, the main control circuit 21 includes a MOS tube set 22, the MOS tube set 22 is disposed between the power end of the lithium battery, the charging end and the load access end, and the enable end of the MOS tube set 22 is in control connection with the control end of the signal acquisition circuit 11. When the charging device is used, the MOS tube group 22 realizes the conduction and the shutdown of the MOS tubes according to the control signal of the signal acquisition circuit 11, and further realizes the conduction and the shutdown of the power end, the charging end and the load access end of the lithium battery. More specifically, each control port of the main control circuit 21 is connected to each corresponding port of the signal acquisition circuit 11 through a first jumper J3, so as to realize the electrical connection between the first circuit board 10 and the second circuit board 20.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A modular lithium battery protection board is characterized by comprising a first circuit board and a second circuit board; the first circuit board is provided with a signal acquisition circuit, the second circuit board is provided with a main control circuit, and the first circuit board and the second circuit board are electrically connected through a jumper wire; the main control circuit is arranged between the lithium battery and the load to realize the connection and disconnection between the lithium battery and the load, and the signal acquisition circuit monitors the voltage of the lithium battery and is in driving control connection with the main control circuit; the first circuit board and the second circuit board jointly realize the output protection of the lithium battery through the signal acquisition circuit and the main control circuit.
2. The modular lithium battery protection plate as claimed in claim 1, further comprising a third circuit board; a USB output circuit is arranged on the third circuit board; the third circuit board is electrically connected with the second circuit board through a jumper wire, and the input end and the output end of the USB output circuit are respectively electrically connected with the output end and the USB port of the main control circuit.
3. The modular lithium battery protection panel as claimed in claim 2, wherein the USB output circuit includes a DC-DC voltage step-down module, a detection module, and a control module; the input end and the output end of the DC-DC voltage reduction module are respectively connected with the output end of the main control circuit and the USB port; the detection module is arranged between the USB port and the negative electrode of the lithium battery and is in control connection with the detection end of the control module; the control end of the control module is connected with the enabling end of the DC-DC voltage reduction module, the control module detects the access condition of the USB port through the detection module, and controls the connection and disconnection of the DC-DC voltage reduction module according to the access condition of the USB port.
4. The protection plate for the modular lithium battery as claimed in claim 2, wherein the USB output circuit further comprises a shutdown module and a wake-up module between the USB port and the negative electrode of the lithium battery; the turn-off module is in control connection with the control module and is used for realizing turn-off and communication between the USB ports according to the access condition of the USB ports; the wake-up module is connected with the wake-up end of the control module and used for sending a wake-up signal to the control module after the load of the USB port is connected, and further controlling the turn-off module and the DC-DC voltage reduction module to be turned on.
5. The modular lithium battery protection plate as claimed in any one of claims 1 to 4, wherein a plurality of detection terminals of the signal acquisition circuit are provided, and each detection terminal of the signal acquisition circuit is electrically connected with each potential of the output circuit of the lithium battery through the acquisition chip; and the control end of the signal acquisition circuit is connected with the enabling end of the main control circuit.
6. The modular lithium battery protection plate as claimed in claim 5, wherein the main control circuit comprises an MOS tube set, the MOS tube set is disposed between the power end, the charging end and the load access end of the lithium battery, and the enable end of the MOS tube set is in control connection with the control end of the signal acquisition circuit; the MOS tube group realizes the conduction and the disconnection among the power supply end, the charging end and the load access end of the lithium battery according to the control signal of the signal acquisition circuit.
7. The modular lithium battery protection plate as claimed in claim 5, wherein the signal acquisition circuit further comprises a weak current switch, and an external power source is connected to the enable terminal of the signal acquisition circuit through the weak current switch.
8. The protection plate for modular lithium batteries as claimed in any one of claims 1 to 4, wherein each control port of said main control circuit is connected to each corresponding port of said signal acquisition circuit by a first jumper J3.
9. The modular lithium battery protection plate as claimed in any one of claims 1 to 4, wherein the signal acquisition circuit comprises a signal acquisition chip; the signal acquisition chip comprises a power end, an enabling end, a detection end and a plurality of control ports, the power end of the signal acquisition chip is connected with an external power supply, the enabling end is connected with the external power supply through a weak current switch, the detection end is connected with each potential of the lithium battery through a jumper J4, and the control ports are connected with each port of the main control circuit through a first jumper J3.
10. The protective plate for a modular lithium battery as claimed in claim 9, wherein the signal collecting chip is an SH367007 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588410.XU CN212572153U (en) | 2020-08-03 | 2020-08-03 | Modularization lithium cell protection shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588410.XU CN212572153U (en) | 2020-08-03 | 2020-08-03 | Modularization lithium cell protection shield |
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| Publication Number | Publication Date |
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| CN212572153U true CN212572153U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021588410.XU Active CN212572153U (en) | 2020-08-03 | 2020-08-03 | Modularization lithium cell protection shield |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312877A (en) * | 2021-05-28 | 2021-08-27 | 深圳市兴隆鑫科技有限公司 | Design method of mobile power supply protection board based on integrated circuit |
-
2020
- 2020-08-03 CN CN202021588410.XU patent/CN212572153U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312877A (en) * | 2021-05-28 | 2021-08-27 | 深圳市兴隆鑫科技有限公司 | Design method of mobile power supply protection board based on integrated circuit |
| CN113312877B (en) * | 2021-05-28 | 2021-11-30 | 深圳市兴隆鑫科技有限公司 | Design method of mobile power supply protection board based on integrated circuit |
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