A high-voltage lithium battery protection chip and protection system

Abstract

The present invention discloses a high-voltage lithium battery protection chip, including a protection chip body, support plates are arranged on the outer walls on both sides of the protection chip body, and a buffer cylinder is welded on the inner wall at the top of the support plate, a circular plate is slidably connected inside the buffer cylinder, a buffer rod is welded on the outer wall at the top of the circular plate, and a top plate is welded on the top of the buffer rod, an inner spring connected to the circular plate is welded on the inner wall at the bottom of the buffer cylinder, and an outer spring connected to the top plate is arranged on the outer wall at the top of the buffer cylinder. The beneficial effects of the present invention are as follows: when the protection chip body is squeezed during transportation or after installation, the elastic force of the inner spring and the outer spring can buffer the squeezing force of the pressure-resistant net, which can play a high-voltage-resistant role for the protection chip body, can prevent the electronic components on the protection chip body from being squeezed and damaged, and realize the high-voltage-resistant function; the rotating installation half ring and the rotating block rotate to make the protrusion plug into the inside of the groove.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery protection chips, and in particular to a high-voltage lithium battery protection chip and a protection system. Background Art

[0002] As portable electronic products come into people's view, the application of lithium batteries is gradually becoming popular. Battery equipment is also becoming more and more the focus of people's special attention, mainly because power lithium batteries and polymer lithium batteries have high energy density, long service life, and can meet green environmental protection regulations. They have gradually replaced nickel-cadmium batteries and nickel-metal hydride rechargeable batteries and become the preferred rechargeable battery choice for portable devices. As a pioneer in the safe application of lithium batteries, lithium battery protection chips can cut off the connection between the battery and the outside world in time when the battery is overcharged, over-discharged, over-current or other abnormal conditions occur, avoiding abnormal conditions from affecting battery safety and ensuring the safe application of lithium batteries.

[0003] For example, a lithium battery charging protection chip with an authorization announcement number of CN212210528U and an authorization announcement date of 2020.12.22 includes a mainboard, a card connector is connected to one side of the upper end of the mainboard, claws are fixedly connected on both sides of the card connector, a metal column is fixedly connected inside the card connector, and a terminal is connected to the internal card connection of the card connector. An overload protection is provided in the mainboard, a current detection is provided in the overload protection, and the current detection is electrically connected to a current-breaking circuit.

[0004] If the protection chip is squeezed during transportation or use, without pressure protection, the electronic components on the protection chip will be easily damaged by external pressure. Therefore, it is urgent to design a high-voltage lithium battery protection chip and protection system to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a high-voltage lithium battery protection chip and a protection system to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A high-voltage lithium battery protection chip comprises a protection chip body, support plates are arranged on the outer walls on both sides of the protection chip body, a buffer tube is welded on the inner wall on the top of the support plate, a circular plate is slidably connected to the inside of the buffer tube, a buffer rod is welded on the outer wall on the top of the circular plate, and a top plate is welded on the top of the buffer rod, an inner spring connected to the circular plate is welded on the inner wall at the bottom of the buffer tube, and an outer spring connected to the top plate is arranged on the outer wall on the top of the buffer tube, the outer spring is sleeved on the outside of the buffer rod, and pressure-resistant nets are welded on the outer walls of the two top plates.

[0008] As a preferred embodiment of the present invention, a rotating seat is provided on the outer walls of both sides of the protection chip body, and a rotating block is rotatably connected to the inner wall of the rotating seat via a rotating shaft.

[0009] As a preferred embodiment of the present invention, a mounting half ring is welded on the outer wall of one side of the rotating block, and a connecting block is welded on the bottom end of the mounting half ring.

[0010] As a preferred embodiment of the present invention, two of the connection blocks are welded with protrusions at the other ends away from the mounting half ring, and the other two connection blocks are provided with grooves at the other ends away from the mounting half ring, and the protrusions are clamped inside the grooves.

[0011] As a preferred embodiment of the present invention, a slide plate is slidably connected inside the protrusion, and a clamping block is integrally connected to an outer wall of one side of the slide plate.

[0012] As a preferred embodiment of the present invention, the outer walls on both sides of the two connecting blocks are provided with card slots, and the card blocks are carded in the card slots.

[0013] As a preferred embodiment of the present invention, a fixing plate is provided on the inner wall of the protrusion, and clamping springs connected to the slide plate are welded on the outer walls on both sides of the fixing plate.

[0014] As a preferred embodiment of the present invention, a mounting seat is welded on the inner wall of the pressure-resistant mesh, and a heat dissipation fan is fixed to the outer wall on the top of the mounting seat by bolts.

[0015] A high-voltage lithium battery protection chip protection system comprises an acquisition module, an analysis module, a control module, a database module, a charging switch module and a discharging switch module, wherein the acquisition module is connected to the analysis module, and the analysis module and the database module are both connected to the control module, the control module controls the charging switch module and the discharging switch module, the acquisition module is used to acquire the voltage value at both ends of the lithium battery and send the voltage value at both ends of the lithium battery to the analysis module, and the analysis module is used to compare the voltage value acquired by the acquisition module, the control module is used to control the charging switch module and the discharging switch module, and the database module is used to store voltage comparison data, and the comparison data respectively include the highest charging voltage value, the lowest discharging voltage value, the falling voltage value and the rising voltage value.

[0016] As a preferred embodiment of the present invention, when the charging voltage value or discharging voltage value of the lithium battery collected by the acquisition module is within the preset value range, the charging switch module or the discharging switch module is restored, and when the voltage value across the lithium battery monitored reaches the rated maximum charging voltage value, the charging switch module is disconnected. When the charging switch module is disconnected, the voltage across the lithium battery will drop, but the dropped voltage value is not caused by discharge. When the dropped voltage value is less than the fall-back voltage value, the battery is fully charged and the charging switch module is always in a closed state; when the voltage value across the lithium battery monitored reaches the rated minimum discharge voltage value, the discharging switch module is disconnected. When the discharging switch module is disconnected, the voltage across the lithium battery will rise, but the risen voltage value is not caused by charging. When the risen voltage value is less than the rising voltage value, the discharging switch module is always in a closed state and no longer discharges.

[0017] In the above technical scheme, the present invention provides a high-voltage lithium battery protection chip and protection system, (1) through the support plate, buffer cylinder, circular plate, buffer rod, top plate, inner spring, outer spring and pressure-resistant net, when the protection chip body is squeezed during transportation or after installation, the elastic force of the inner spring and the outer spring can buffer the squeezing force of the pressure-resistant net, which can play a high-voltage resistance role for the protection chip body, and can prevent the electronic components on the protection chip body from being squeezed and damaged, thereby achieving a high-voltage resistance function; (2) through the rotating seat, rotating block, mounting half ring, connecting block, protrusion, groove, slide plate, clamping block, clamping slot, fixing plate and clamping spring, the rotating mounting half ring and the rotating block are rotated to make the protrusion plug in Inside the groove, the elastic force of the card spring can make the card block card into the inside of the card slot, so as to fix the protection chip body on the lithium battery; (3) through the set pressure-resistant net, mounting seat and heat dissipation fan, the heat dissipation fan can blow air on the protection chip body, so as to blow away the heat generated by the electronic components on the protection chip body during operation, so as to dissipate heat for the protection chip body and prevent the electronic components from being burned; (4) through the set acquisition module, analysis module, control module, recovery module, charging switch module and discharge switch module, the voltage at both ends of the lithium battery can be monitored, the lithium battery can be protected in real time, and the lithium battery can be prevented from being overcharged or over-discharged, thereby avoiding the damage to the lithium battery caused by overcharging and over-discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1A three-dimensional structural schematic diagram of a high-voltage lithium battery protection chip and a protection system embodiment of the present invention.

[0020] Figure 2 A three-dimensional structural schematic diagram of a high-voltage lithium battery protection chip and a protection system embodiment of the present invention.

[0021] Figure 3 A schematic diagram of an installation semi-ring structure provided for an embodiment of a high-voltage lithium battery protection chip and a protection system of the present invention.

[0022] Figure 4 A schematic diagram of a connection block structure provided for an embodiment of a high-voltage lithium battery protection chip and a protection system of the present invention.

[0023] Figure 5 A schematic diagram of the module structure provided for an embodiment of a high-voltage lithium battery protection chip and a protection system of the present invention.

[0024] Description of reference numerals:

[0025] 1. Protect the chip body; 2. Support plate; 3. Buffer cylinder; 4. Round plate; 5. Buffer rod; 6. Top plate; 7. Inner spring; 8. Outer spring; 9. Pressure-resistant net; 10. Rotating seat; 11. Rotating block; 12. Mounting half ring; 13. Connecting block; 14. Bump; 15. Groove; 16. Slide plate; 17. Block; 18. Slot; 19. Fixing plate; 20. Snap-on spring; 21. Mounting seat; 22. Cooling fan; 23. Acquisition module; 24. Analysis module; 25. Control module; 26. Database module; 27. Charging switch module; 28. Discharging switch module. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, a high-voltage lithium battery protection chip provided by an embodiment of the present invention includes a protection chip body 1, support plates 2 are arranged on the outer walls on both sides of the protection chip body 1, and a buffer tube 3 is welded on the inner wall of the top of the support plate 2, a circular plate 4 is slidably connected inside the buffer tube 3, a buffer rod 5 is welded on the outer wall of the top of the circular plate 4, and a top plate 6 is welded on the top of the buffer rod 5, an inner spring 7 connected to the circular plate 4 is welded on the inner wall of the bottom of the buffer tube 3, and an outer spring 8 connected to the top plate 6 is arranged on the outer wall of the top of the buffer tube 3, the outer spring 8 is sleeved on the outside of the buffer rod 5, and a pressure-resistant mesh 9 is welded on the outer walls of the two top plates 6.

[0028] Specifically, in the present embodiment, a high-voltage lithium battery protection chip includes a protection chip body 1, support plates 2 are provided on the outer walls on both sides of the protection chip body 1, and a buffer tube 3 is welded on the inner wall of the top of the support plate 2, a circular plate 4 is slidably connected to the inside of the buffer tube 3, a buffer rod 5 is welded on the outer wall of the top of the circular plate 4, and a top plate 6 is welded on the top of the buffer rod 5, an inner spring 7 connected to the circular plate 4 is welded on the inner wall of the bottom of the buffer tube 3, and an outer spring 8 connected to the top plate 6 is provided on the outer wall of the top of the buffer tube 3, the outer spring 8 is sleeved on the outside of the buffer rod 5, and a pressure-resistant net 9 is welded on the outer walls of the two top plates 6. When the protection chip body 1 is squeezed during transportation or after being installed on a lithium battery, the elastic force of the inner spring 7 and the outer spring 8 can buffer the squeezing force received by the pressure-resistant net 9, thereby preventing the electronic components on the protection chip body 1 from being damaged after being squeezed, thereby achieving a high pressure-resistant effect.

[0029] The present invention provides a high-voltage lithium battery protection chip and protection system. When the protection chip body 1 is squeezed during transportation or after installation, the elastic force of the inner spring 7 and the outer spring 8 can buffer the squeezing force exerted on the pressure-resistant net 9, thereby providing high-voltage resistance to the protection chip body 1 and preventing the electronic components on the protection chip body 1 from being squeezed and damaged, thereby achieving a high-voltage resistance function.

[0030] In one embodiment provided by the present invention, Figure 1 and Figure 3 As shown, a rotating seat 10 is provided on the outer walls of both sides of the protection chip body 1, and a rotating block 11 is rotatably connected to the inner wall of the rotating seat 10 through a rotating shaft. When the mounting half ring 12 is rotated, the rotating block 11 rotates inside the rotating seat 10.

[0031] In another embodiment provided by the present invention, Figure 1 and Figure 3 As shown, a mounting half ring 12 is welded on the outer wall of one side of the rotating block 11, and a connecting block 13 is welded on the bottom end of the mounting half ring 12. When the mounting half ring 12 rotates, it can drive the connecting block 13 to rotate.

[0032] In another embodiment provided by the present invention, Figure 1 and Figure 4 As shown, two of the connection blocks 13 are welded with protrusions 14 at the other ends away from the mounting half ring 12, and the other two connection blocks 13 are provided with grooves 15 at the other ends away from the mounting half ring 12. The protrusions 14 are snap-fitted into the inside of the grooves 15, so that the two connection blocks 13 can be quickly snap-fitted.

[0033] In one embodiment provided by the present invention, Figure 4 As shown, a slide plate 16 is slidably connected inside the protrusion 14 , and a clamping block 17 is integrally connected to the outer wall of one side of the slide plate 16 . When the slide plate 16 moves, the clamping block 17 is driven to move.

[0034] In another embodiment provided by the present invention, Figure 4 As shown, the outer walls of the two connecting blocks 13 on both sides are provided with a clamping groove 18 , and the clamping block 17 is clamped in the inside of the clamping groove 18 , so as to connect and fix the two connecting blocks 13 together.

[0035] In another embodiment provided by the present invention, Figure 4 As shown, a fixing plate 19 is provided on the inner wall of the protrusion 14 , and a clamping spring 20 connected to the slide plate 16 is welded on the outer walls on both sides of the fixing plate 19 . The elastic force of the clamping spring 20 pushes the clamping block 17 to be clamped inside the clamping groove 18 .

[0036] In one embodiment provided by the present invention, Figure 1 and Figure 2 As shown, a mounting seat 21 is welded on the inner wall of the pressure-resistant mesh 9, and a cooling fan 22 is fixed to the outer wall at the top of the mounting seat 21 by bolts. The cooling fan 22 can blow away the heat generated by the electronic components on the protection chip body 1, and can dissipate heat for the protection chip body 1, and can prevent the electronic components from burning out.

[0037] A high-voltage lithium battery protection chip protection system includes an acquisition module 23, an analysis module 24, a control module 25, a database module 26, a charging switch module 27 and a discharging switch module 28. The acquisition module 23 is connected to the analysis module 24, and the analysis module 24 and the database module 26 are both connected to the control module 25. The control module 25 controls the charging switch module 27 and the discharging switch module 28. The acquisition module 23 is used to acquire the voltage value at both ends of the lithium battery and send the voltage value at both ends of the lithium battery to the analysis module 24, and the analysis module 24 is used to compare the voltage value acquired by the acquisition module 23. The control module 25 is used to control the charging switch module 27 and the discharging switch module 28, and the database module 26 is used to store voltage comparison data. The comparison data respectively include the highest charging voltage value, the lowest discharging voltage value, the falling voltage value and the rising voltage value, so as to monitor the voltage at both ends of the lithium battery and protect the lithium battery in real time.

[0038] In one embodiment provided by the present invention, Figure 5As shown, when the charging voltage value or discharging voltage value of the lithium battery collected by the collection module 23 is within the preset value range, the charging switch module 27 or the discharging switch module 28 is restored. When the voltage value at both ends of the lithium battery monitored reaches the rated maximum charging voltage value, the charging switch module 27 is disconnected. When the charging switch module 27 is disconnected, the voltage at both ends of the lithium battery will drop, but the dropped voltage value is not caused by discharge. When the dropped voltage value is less than the fall-back voltage value, the battery is fully charged at this time, and the charging switch module 27 is always in a closed state; when the voltage value at both ends of the lithium battery monitored reaches the rated minimum discharge voltage value, the discharging switch module 28 is disconnected. When the discharging switch module 28 is disconnected, the voltage at both ends of the lithium battery will rise, but the risen voltage value is not caused by charging. When the risen voltage value is less than the rising voltage value, the discharging switch module 28 is always in a closed state and no longer discharges, which can prevent the lithium battery from being overcharged or over-discharged, thereby avoiding damage to the lithium battery caused by overcharging and over-discharging.

[0039] Working principle: When the high-voltage lithium battery protection chip and protection system are in use, when the protection chip body 1 is squeezed during transportation or after installation, the elastic force of the inner spring 7 and the outer spring 8 can buffer the squeezing force received by the pressure-resistant net 9, and can prevent the electronic components on the protection chip body 1 from being damaged after being squeezed, thereby realizing the high pressure resistance function. The protection chip body 1 is placed on the top of the lithium battery, and the installation semi-ring sleeve 12 is placed on the outside of the lithium battery. The protrusion 14 is inserted into the inside of the groove 15. The elastic force of the clamping spring 20 will push the clamping block 17 to be clamped in the inside of the clamping slot 18, and the two opposite installation semi-rings 12 can be connected together. The protection chip body 1 can be installed on the outside of the lithium battery. The electronic components on the protection chip body 1 will generate heat during operation. The heat dissipation fan 22 can blow away the heat, and can dissipate heat for the protection chip body 1, thereby preventing the electronic components from burning out. The acquisition module 23 of the protection chip body 1 collects the voltage values ​​at both ends of the lithium battery and sends the voltage values ​​at both ends of the lithium battery to the analysis module 24. The analysis module 24 collects the voltage values ​​at both ends of the lithium battery according to the comparison data inside the database module 26: the highest charging voltage The voltage value, the minimum discharge voltage value, the fall-back voltage value and the rise-back voltage value are analyzed for the voltage value collected by the collection module 23. During charging, when the voltage value at both ends of the lithium battery monitored reaches the rated maximum charging voltage value, the control module 25 disconnects the charging switch module 27. When the charging switch module 27 is disconnected, the voltage at both ends of the lithium battery will drop, but the dropped voltage value is not caused by discharge. When the dropped voltage value is less than the fall-back voltage value, the battery is fully charged, so that the charging switch module 27 is always in the closed state; during discharging, when the monitored voltage value at both ends of the lithium battery reaches the rated maximum charging voltage value, the control module 25 disconnects the charging switch module 27. When the charging switch module 27 is disconnected, the voltage at both ends of the lithium battery will drop, but the dropped voltage value is not caused by discharge. When the dropped voltage value is less than the fall-back voltage value, the battery is fully charged, so that the charging switch module 27 is always in the closed state. When the measured voltage value across the lithium battery reaches the rated minimum discharge voltage value, the control module 25 disconnects the discharge switch module 28. When the discharge switch module 28 is disconnected, the voltage across the lithium battery will rise, but the rising voltage value is not caused by charging. When the rising voltage value is less than the rising voltage value, the discharge switch module 28 is always in the closed state and no longer discharges. The voltage across the lithium battery can be monitored, and the lithium battery can be protected in real time, which can prevent the lithium battery from being overcharged or over-discharged, thereby avoiding damage to the lithium battery caused by overcharging or over-discharging.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-voltage lithium battery protection chip, comprising a protection chip body (1), characterized in that: Support plates (2) are provided on the outer walls of both sides of the protection chip body (1), and a buffer cylinder (3) is welded on the inner wall of the top of the support plate (2), a circular plate (4) is slidably connected to the inside of the buffer cylinder (3), a buffer rod (5) is welded on the outer wall of the top of the circular plate (4), and a top plate (6) is welded on the top of the buffer rod (5), an inner spring (7) connected to the circular plate (4) is welded on the inner wall of the bottom of the buffer cylinder (3), and an outer spring (8) connected to the top plate (6) is provided on the outer wall of the top of the buffer cylinder (3), the outer spring (8) is sleeved on the outside of the buffer rod (5), and a pressure-resistant net (9) is welded on the outer walls of the two top plates (6); A rotating seat (10) is provided on the outer walls of both sides of the protection chip body (1), and a rotating block (11) is rotatably connected to the inner wall of the rotating seat (10) via a rotating shaft; A mounting half ring (12) is welded on the outer wall of one side of the rotating block (11), and a connecting block (13) is welded at the bottom end of the mounting half ring (12); Two of the connection blocks (13) are welded with protrusions (14) at the other ends away from the mounting half ring (12), and the other two connection blocks (13) are provided with grooves (15) at the other ends away from the mounting half ring (12), and the protrusions (14) are snap-fitted into the inside of the grooves (15); The interior of the protrusion (14) is slidably connected to a slide plate (16), and a clamping block (17) is integrally connected to an outer wall of one side of the slide plate (16); The outer walls of both sides of the two connecting blocks (13) are provided with a clamping groove (18), and the clamping blocks (17) are clamped inside the clamping groove (18); A fixing plate (19) is provided on the inner wall of the protrusion (14), and clamping springs (20) connected to the slide plate (16) are welded on the outer walls on both sides of the fixing plate (19).

2. A high voltage lithium battery protection chip according to claim 1, characterized in that: A mounting seat (21) is welded on the inner wall of the pressure-resistant net (9), and a heat dissipation fan (22) is fixed on the outer wall of the top of the mounting seat (21) by means of bolts.

3. A high-voltage lithium battery protection chip protection system, applied to the high-voltage lithium battery protection chip according to any one of claims 1-2, characterized in that: The invention comprises a collection module (23), an analysis module (24), a control module (25), a database module (26), a charging switch module (27) and a discharging switch module (28); the collection module (23) is connected to the analysis module (24), and the analysis module (24) and the database module (26) are both connected to the control module (25); the control module (25) controls the charging switch module (27) and the discharging switch module (28); the collection module (23) is used to collect voltage values ​​at both ends of a lithium battery and send the voltage values ​​at both ends of the lithium battery to the analysis module (24); the analysis module (24) is used to compare the voltage values ​​collected by the collection module (23); the control module (25) is used to control the charging switch module (27) and the discharging switch module (28); and the database module (26) is used to store voltage comparison data, the comparison data respectively comprising a maximum charging voltage value, a minimum discharging voltage value, a falling voltage value and a rising voltage value.

4. A high voltage lithium battery protection chip protection system according to claim 3, characterized in that: When the charging voltage value or discharging voltage value of the lithium battery collected by the collection module (23) is within a preset value range, the charging switch module (27) or the discharging switch module (28) is restored. When the voltage value at both ends of the lithium battery monitored reaches the rated maximum charging voltage value, the charging switch module (27) is disconnected. When the charging switch module (27) is disconnected, the voltage at both ends of the lithium battery will decrease, but the decreased voltage value is not caused by discharging. When the decreased voltage value is less than the fall-back voltage value, the battery is fully charged and the charging switch module (27) is always in a closed state. When the voltage value at both ends of the lithium battery monitored reaches the rated minimum discharging voltage value, the discharging switch module (28) is disconnected. When the discharging switch module (28) is disconnected, the voltage at both ends of the lithium battery will increase, but the increased voltage value is not caused by charging. When the increased voltage value is less than the increased voltage value, the discharging switch module (28) is always in a closed state and no longer discharges.

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