CN211209345U - Intelligent lithium battery protection plate - Google Patents
Intelligent lithium battery protection plate Download PDFInfo
- Publication number
- CN211209345U CN211209345U CN201922499080.0U CN201922499080U CN211209345U CN 211209345 U CN211209345 U CN 211209345U CN 201922499080 U CN201922499080 U CN 201922499080U CN 211209345 U CN211209345 U CN 211209345U
- Authority
- CN
- China
- Prior art keywords
- circuit
- overcharge
- protection
- battery
- battery pack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 claims description 52
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 23
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model belongs to the technical field of the battery protection circuit, especially, relate to an intelligence lithium battery protection shield, be equipped with protection circuit on the intelligence lithium battery protection shield, protection circuit includes that one-level overcharge protection circuit, second grade overcharge control circuit and charge and discharge control circuit, second grade overcharge control circuit with the second grade overcharge protection circuit's output with one-level overcharge protection circuit connects, charge and discharge control circuit with one-level overcharge protection circuit with second grade overcharge control circuit connects, charge and discharge control circuit's output still with the output positive pole of group battery is connected. The utility model discloses a set up one-level overcharge protection circuit with second grade overcharge protection circuit provides dual overcharge protection for the group battery, and then avoids the insufficient problem of group battery charging protection, avoids the group battery to take place the problem of getting on fire and burning, has improved intelligent lithium battery protection shield's security performance.
Description
Technical Field
The utility model belongs to the technical field of the battery protection circuit, especially, relate to an intelligence lithium cell protection shield.
Background
The stand-by power supply of the desktop computer is also called as an external UPS power supply of the desktop computer, and the UPS power supply can play the roles of voltage stabilization and power continuation when power is cut off. When the external UPS power supply is used, the UPS power supply is connected with a mains supply, then the computer host is connected with the UPS power supply, so that after the mains supply is suddenly powered off, the UPS power supply can also enable the computer to keep running for a period of time, a buffer time is given to an end user, computer files and data are backed up and stored in time, and the problem that the data are lost due to power failure and uncontrollable consequences are caused is avoided.
At present, the external UPS power of computer all is equipped with the battery protection shield, but the battery protection shield of the external UPS power of computer on the market mostly has the insufficient problem of battery pack protection to the external UPS power of computer, leads to the protection insufficient easily, and then takes place the risk that the group battery catches fire and burns, very big reduction the security performance of battery protection shield and the external UPS power of computer, consequently, it is necessary to design an intelligent lithium battery protection shield in fact.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an intelligence lithium battery protection shield aims at solving among the prior art desk-top computer stand-by power supply's lithium battery protection shield overcharge protection insufficient technical problem.
In order to achieve the above object, an embodiment of the present invention provides an intelligent lithium battery protection board applied to a battery pack of a standby power supply of a desktop computer, the intelligent lithium battery protection board is provided with a protection circuit thereon, the protection circuit includes
The primary overcharge protection circuit is connected with the battery pack;
the input end of the secondary overcharge protection circuit is connected with the battery pack;
the secondary overcharge control circuit is connected with the output end of the secondary overcharge protection circuit and the primary overcharge protection circuit;
and the charging and discharging control circuit is connected with the primary overcharge protection circuit and the secondary overcharge control circuit, and the output end of the charging and discharging control circuit is also connected with the anode of the output end of the battery pack.
Optionally, the primary overcharge protection circuit includes a battery pack input terminal, a battery pack single voltage detection circuit, a charge-discharge current collection circuit, a battery management chip and an external communication circuit, the battery pack single voltage detection circuit and the charge-discharge current collection circuit are connected with the battery pack input terminal, the battery management chip is connected with the battery pack single voltage detection circuit and the charge-discharge current collection circuit, the battery management chip is further connected with the secondary overcharge control circuit and the charge-discharge control circuit, and the external communication circuit is connected with the battery management chip.
Optionally, the battery pack cell voltage detection circuit includes a plurality of cell voltage detection resistors, one end of each cell voltage detection resistor is connected to the battery pack input terminal, and the other end of each cell voltage detection resistor is connected to the battery management chip.
Optionally, the charge and discharge current collection circuit includes charge and discharge current collection resistor, charge and discharge current collection resistor one end with the input negative pole of group battery is connected, charge and discharge current collection resistor's the other end with the output negative pole of group battery is connected, charge and discharge current collection resistor still with the battery management chip is connected.
Optionally, the external communication circuit includes a communication interface circuit and a battery pack output end, the communication interface circuit is connected to the battery management chip, and the battery pack output end is connected to the communication interface circuit.
Optionally, the secondary overcharge protection circuit comprises a battery pack overcharge detection circuit and a secondary protection chip, the battery pack overcharge detection circuit is connected with the input end of the battery pack, the secondary protection chip is connected with the battery pack overcharge detection circuit, and the secondary protection chip is further connected with the secondary overcharge control circuit.
Optionally, the battery pack overcharge detection circuit includes a plurality of overcharge detection resistors, one end of each overcharge detection resistor is connected to the input end of the battery pack, and the other end of each overcharge detection resistor is connected to the secondary protection chip.
Optionally, the second-stage overcharge control circuit comprises a three-terminal fuse and a control MOS transistor, a first end of the three-terminal fuse is connected with the positive electrode of the input end of the battery pack, a second end of the three-terminal fuse is connected with the charge and discharge control circuit, a third end of the three-terminal fuse is connected with the drain electrode of the control MOS transistor, and the grid electrode of the control MOS transistor is connected with the second-stage protection chip and the battery management chip.
Optionally, the charge and discharge control circuit includes a first MOS transistor assembly and a second MOS transistor assembly, and the first MOS transistor assembly and the second MOS transistor assembly are connected in series; the first MOS tube component and the second MOS tube component comprise two MOS tubes which are connected in parallel.
Optionally, the intelligent lithium battery protection board is further provided with a nickel sheet, and the nickel sheet is connected with the battery pack through a nickel strap in a spot welding manner.
The embodiment of the utility model provides an above-mentioned one or more technical scheme in the intelligent lithium battery protection shield have one of following technological effect at least: the utility model discloses a set up the one-level overcharge protection circuit the second grade overcharge control circuit with the second grade overcharge protection circuit, make and work as when the one-level overcharge protection circuit damaged, the second grade overcharge protection circuit can continue to carry out the overcharge protection to the group battery, so, work as the damage takes place to lead to when overcharging became invalid for the reason for the one-level overcharge protection circuit, the second grade overcharge protection circuit can pass through the second grade overcharge control circuit lasts and realizes the overcharge protection to the group battery to provide dual overcharge protection for the group battery, and then avoid the insufficient problem of group battery charging protection, avoid the group battery to take place the problem of catching fire and burning, improved the security performance of intelligence lithium battery protection shield.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a circuit block diagram of a protection circuit of an intelligent lithium battery protection board according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a protection circuit of an intelligent lithium battery protection board according to an embodiment of the present invention;
fig. 3 is the embodiment of the utility model provides a spatial structure simplified diagram of intelligent lithium battery protection shield.
Wherein, in the figures, the respective reference numerals:
the protection circuit 100, the primary overcharge protection circuit 200, the battery pack monomer voltage detection circuit 210, the charge-discharge current acquisition circuit 220, the battery management chip U2, the external communication circuit 230, the communication interface circuit 231, the secondary overcharge protection circuit 300, the battery pack overcharge detection circuit 310, the secondary overcharge control circuit 400, the charge-discharge control circuit 500, the intelligent lithium battery protection board 600 and the nickel sheet 610.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
In an embodiment of the present invention, as shown in fig. 1-3, an intelligent lithium battery protection board 600 is provided, which is applied to a battery pack of a standby power supply of a desktop computer, wherein the intelligent lithium battery protection board 600 is provided with a protection circuit 100, and the protection circuit 100 includes
The primary overcharge protection circuit 200, the primary overcharge protection circuit 100 is connected with the battery pack;
the secondary overcharge protection circuit 300, wherein the input end of the secondary overcharge protection circuit 300 is connected with the battery pack;
a secondary overcharge control circuit 400 connected to the output of the secondary overcharge protection circuit and the primary overcharge protection circuit;
and the charging and discharging control circuit 500 is connected with the primary overcharge protection circuit and the secondary overcharge control circuit, and the output end of the charging and discharging control circuit is also connected with the positive electrode of the output end of the battery pack.
The utility model discloses a setting one-level overcharge protection circuit 200 the second grade overcharge control circuit 400 with the second grade overcharge protection circuit 300, make work as when the one-level overcharge protection circuit 200 damages, the second grade overcharge protection circuit 300 can continue to carry out the overcharge protection to the group battery, so, work as the one-level overcharge protection circuit 200 takes place to damage when leading to overcharging the inefficacy, the second grade overcharge protection circuit 300 can pass through the second grade overcharge control circuit 400 lasts to realize the overcharge protection to the group battery to provide dual overcharge protection for the group battery, and then avoid the group battery charge protection problem, avoid the group battery to take place the problem of firing and burning inadequately, improved the security performance of intelligence lithium battery protection board.
As shown in fig. 2, the primary overcharge protection circuit 200 includes a battery pack input terminal CON1, a battery pack cell voltage detection circuit 210, a charge and discharge current acquisition circuit 220, a battery management chip U2, and an external communication circuit 230, where the battery pack cell voltage detection circuit 210 and the charge and discharge current acquisition circuit 220 are both connected to the battery pack input terminal CON1, the battery management chip U2 is connected to the battery pack cell voltage detection circuit 210 and the charge and discharge current acquisition circuit 220, the battery management chip U2 is further connected to the secondary overcharge control circuit 400 and the charge and discharge control circuit 500, and the external communication circuit 230 is connected to the battery management chip U2. Specifically, in the present embodiment, the model number of the battery management chip U2 is preferably BQ30Z55 DBTR-R3. The chip is a TI professional battery management chip, and can measure parameters such as available capacity, voltage, current, temperature and the like of the battery pack by utilizing a high-performance simulation peripheral integrated with the chip and retain data.
The battery pack cell voltage detection circuit 210 is configured to detect a voltage input by the battery pack input terminal CON 1. The battery pack cell voltage detection circuit 210 includes a plurality of cell voltage detection resistors, one end of each of the cell voltage detection resistors is connected to the battery pack input terminal CON1, and the other end of each of the cell voltage detection resistors is connected to the battery management chip U2. Specifically, the number of the cell voltage detection resistors is four, and the four cell voltage detection resistors are labeled as R1, R2, R3 and R4. The four cell voltage detection resistors are respectively connected with a sixth pin, a fifth pin, a fourth pin and a third pin of the battery management chip U2.
The charging and discharging current collecting circuit 220 is configured to collect a current input by the battery pack input terminal CON 1. The charge and discharge current collecting circuit 220 includes a charge and discharge current collecting resistor, one end of the charge and discharge current collecting resistor is connected to the battery pack input terminal CON1, and specifically, one end of the charge and discharge current collecting resistor is connected to the negative electrode of the input terminal of the battery pack. The other end of the charge and discharge current acquisition resistor is connected with the negative electrode of the output end of the battery pack. The charging and discharging current collecting resistor is also connected with the battery management chip U2. Specifically, two ends of the charging and discharging current collecting resistor are respectively connected with a ninth pin and a tenth pin of the battery management chip U2. In this embodiment, the charging and discharging current collecting resistor is denoted by a reference numeral R10.
The external communication circuit 230 is used for sending the parameter information detected by the battery management chip U2 from an external device, such as a host system of a computer. Specifically, the external communication circuit 230 includes a communication interface circuit 231 and a battery pack output terminal CON9, the communication interface circuit 231 is connected to the battery management chip U2, and the battery pack output terminal CON9 is connected to the communication interface circuit 231. And the battery pack output end CON9 is connected with one end of the charge and discharge current acquisition resistor.
Further, the communication interface circuit 231 includes a twenty-second resistor R22 and a fourth diode D4, one end of the twenty-second resistor R22 is connected to the thirteenth pin of the battery management chip U2, the other end of the twenty-second resistor R22 is connected to the cathode of the fourth diode D4, and the anode of the fourth diode D4 is connected to the battery pack output terminal CON 9; the communication interface circuit further comprises a twenty-third resistor R23 and a fifth diode D4, wherein one end of the twenty-third resistor R23 is connected with a fifteenth pin of the battery management chip U2, the other end of the twenty-third resistor R23 is connected with a cathode of the fifth diode D5, and an anode of the fifth diode D5 is connected with the battery pack output terminal CON 9. The fifteenth pin and the thirteenth pin of the battery management chip U2 are SMBus v1.1 compatible interfaces, and through the SMBus v1.1 compatible interfaces, the battery management chip U2 can send charging current and voltage parameter information to external devices, such as a master control system of a computer.
The secondary overcharge protection circuit 300 is used for continuously performing overcharge protection on the battery pack when the primary overcharge protection circuit 200 is damaged. The secondary overcharge protection circuit 300 comprises a battery pack overcharge detection circuit 310 and a secondary protection chip U1, wherein the battery pack overcharge detection circuit 310 is connected with the battery pack input end CON1, the secondary protection chip U1 is connected with the battery pack overcharge detection circuit 310, and the secondary protection chip U1 is further connected with the secondary overcharge control circuit 400. Specifically, in this embodiment, the model of the secondary protection chip U1 is preferably BQ 294702.
The battery pack overcharge detection circuit 310 is configured to detect a voltage input by the battery pack input terminal CON1 and feed the voltage back to the secondary protection chip U1. The battery pack overcharge detection circuit 310 includes a plurality of overcharge detection resistors, one end of each overcharge detection resistor is connected to the battery pack input terminal CON1, and the other end of each overcharge detection resistor is connected to the secondary protection chip U1. In this embodiment, the number of the overcharge detection resistors is four, and the four overcharge detection resistors are respectively connected to the second pin, the third pin, the fourth pin, and the fifth pin of the secondary protection chip U1. Specifically, the four overcharge detection resistors are labeled R6, R7, R7 and R9, respectively.
The second-stage overcharge control circuit 400 includes a three-terminal fuse F1 and a control MOS transistor Q1, a first terminal of the three-terminal fuse F1 is connected to the battery pack input terminal CON1, and specifically, a first terminal of the three-terminal fuse F1 is connected to an input terminal anode of the battery pack. The second end of the three-terminal fuse F1 is connected with the charge and discharge control circuit 500, the third end of the three-terminal fuse F1 is connected with the drain of the control MOS tube Q1, and the grid of the control MOS tube Q1 is connected with the secondary protection chip U1 and the battery management chip U2. By providing the three-terminal fuse F1, the current is self-destroyed after exceeding its threshold and for a while, thereby protecting the entire circuit. Specifically, the gate of the control MOS transistor Q1 is connected to the eighth pin of the secondary protection chip U1, and the gate of the control MOS transistor Q1 is connected to the twenty-six pin of the battery management chip U2.
Specifically, work as one-level overcharge protection circuit 200 takes place to damage, second grade overcharge protection circuit 300 is opened, burns out three-terminal fuse F1 to cut off the discharge circuit, so, preferentially work as when one-level overcharge protection circuit 200 takes place to damage and leads to the overcharge inefficacy, second grade overcharge protection circuit 300 can last to realize the overcharge protection to the group battery, and then provides dual overcharge protection, and only one overcharge protection circuit among the prior art, the utility model discloses in improved protection dynamics and efficiency of protection greatly, avoided taking place to fire because of the group battery that the overcharge inefficacy brought, and then the security performance of influence use has improved the product greatly.
The charge and discharge control circuit 500 includes a first MOS transistor assembly and a second MOS transistor assembly, which are connected in series; the first MOS tube component and the second MOS tube component comprise two MOS tubes which are connected in parallel. Specifically, two MOS transistors of the first MOS transistor assembly are a fifth MOS transistor and a sixth MOS transistor, the fifth MOS transistor and the sixth MOS transistor are connected in parallel, gates of the fifth MOS transistor and the sixth MOS transistor are connected with a first pin of the battery management chip U2, and sources of the fifth MOS transistor and the sixth MOS transistor are connected with a second end of the three-terminal fuse F1.
The two MOS tubes of the second MOS tube assembly are a third MOS tube and a fourth MOS tube, the third MOS tube and the fourth MOS tube are connected in parallel, the grids of the third MOS tube and the fourth MOS tube are connected with a thirtieth pin of the battery management chip U2, the drains of the third MOS tube and the fourth MOS tube are connected with the drains of the fifth MOS tube and the sixth MOS tube, and the sources of the third MOS tube and the fourth MOS tube are connected with the battery pack output end CON 9.
Further, the fifth MOS transistor, the sixth MOS transistor, the third MOS transistor and the fourth MOS transistor are all N-channel MOS transistors of 1.7m Ω, and are preferably of the type FNK10N 01-a. By adopting a mode of 2 serial-2 parallel to construct the charge-discharge control circuit of the main loop, the design idea and the selection of the MOS tube can improve the loading capacity to 200W, and the power is greatly improved.
As shown in fig. 3, the intelligent lithium battery protection plate 600 is further provided with a nickel sheet 610, and the nickel sheet 610 is connected with the battery pack through a nickel strap by spot welding. Specifically, the number of the nickel plate 610 is plural. Through setting up nickel piece 610, guaranteed the production efficiency of PACK process and the uniformity of solder joint, promote the reliability of product electric property by a wide margin. Through the mode of spot welding, utilize nickel strap can be quick will intelligence lithium battery protection shield set up in the head of group battery, so, can save the space of whole group battery product, pleasing to the eye atmosphere, it is also convenient simultaneously the shell design and the packaging design of group battery.
In addition, during the in-service use, still can add temperature probe on the intelligent lithium battery protection board 100, during the installation, generally with temperature probe set up in the coupling groove department of each battery of group battery to in reasonable the putting temperature probe, and do not occupy the packaging design of other space influences whole group batteries. In particular, the temperature probe is preferably a linear temperature probe, such as an NTC.
In addition, referring to fig. 3, in an L AYOUT layout, the output terminal negative electrode P-on the intelligent lithium battery protection board 100 in the present application is moved to a position near the charge-discharge current collection resistor, that is, near the resistor R10, and compared with the traditional design of the output terminal negative electrode on the board edge, the impedance of the intelligent lithium battery protection board in the present application is reduced by 3-5m Ω, so that the current path of a large current at the negative terminal passing through the board is greatly shortened, and a very good balancing effect is achieved on the temperature rise of the whole intelligent lithium battery protection board.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like 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 an intelligence lithium cell protection shield, is applied to on desktop computer stand-by power supply's the group battery, its characterized in that, be equipped with protection circuit on the intelligence lithium cell protection shield, protection circuit includes
The primary overcharge protection circuit is connected with the battery pack;
the input end of the secondary overcharge protection circuit is connected with the battery pack;
the secondary overcharge control circuit is connected with the output end of the secondary overcharge protection circuit and the primary overcharge protection circuit;
and the charging and discharging control circuit is connected with the primary overcharge protection circuit and the secondary overcharge control circuit, and the output end of the charging and discharging control circuit is also connected with the anode of the output end of the battery pack.
2. The intelligent lithium battery protection plate as claimed in claim 1, wherein the primary overcharge protection circuit comprises a battery pack input terminal, a battery pack cell voltage detection circuit, a charge and discharge current collection circuit, a battery management chip and an external communication circuit, the battery pack cell voltage detection circuit and the charge and discharge current collection circuit are both connected to the battery pack input terminal, the battery management chip is connected to the battery pack cell voltage detection circuit and the charge and discharge current collection circuit, the battery management chip is further connected to the secondary overcharge control circuit and the charge and discharge control circuit, and the external communication circuit is connected to the battery management chip.
3. The intelligent lithium battery protection board as claimed in claim 2, wherein the battery pack cell voltage detection circuit comprises a plurality of cell voltage detection resistors, one end of each cell voltage detection resistor is connected to the battery pack input terminal, and the other end of each cell voltage detection resistor is connected to the battery management chip.
4. The intelligent lithium battery protection plate as claimed in claim 2, wherein the charge and discharge current collection circuit comprises a charge and discharge current collection resistor, one end of the charge and discharge current collection resistor is connected to a negative terminal of the input terminal of the battery pack, the other end of the charge and discharge current collection resistor is connected to a negative terminal of the output terminal of the battery pack, and the charge and discharge current collection resistor is further connected to the battery management chip.
5. The intelligent lithium battery protection panel as recited in claim 2, wherein the external communication circuit comprises a communication interface circuit and a battery pack output, the communication interface circuit being connected to the battery management chip, the battery pack output being connected to the communication interface circuit.
6. The intelligent lithium battery protection plate as claimed in any one of claims 2-5, wherein the secondary overcharge protection circuit comprises a battery overcharge detection circuit and a secondary protection chip, the battery overcharge detection circuit is connected to the battery input terminal, the secondary protection chip is connected to the battery overcharge detection circuit, and the secondary protection chip is further connected to the secondary overcharge control circuit.
7. The intelligent lithium battery protection plate as claimed in claim 6, wherein the battery pack overcharge detection circuit comprises a plurality of overcharge detection resistors, one end of each overcharge detection resistor is connected to the battery pack input terminal, and the other end of each overcharge detection resistor is connected to the secondary protection chip.
8. The protection board for a lithium battery as claimed in claim 7, wherein the secondary overcharge control circuit includes a three-terminal fuse and a control MOS transistor, a first terminal of the three-terminal fuse is connected to a positive electrode of an input terminal of the battery pack, a second terminal of the three-terminal fuse is connected to the charge and discharge control circuit, a third terminal of the three-terminal fuse is connected to a drain of the control MOS transistor, and a gate of the control MOS transistor is connected to the secondary protection chip and the battery management chip.
9. The intelligent lithium battery protection plate as claimed in claim 8, wherein the charge and discharge control circuit comprises a first MOS tube assembly and a second MOS tube assembly, the first MOS tube assembly and the second MOS tube assembly being connected in series; the first MOS tube component and the second MOS tube component comprise two MOS tubes which are connected in parallel.
10. The intelligent lithium battery protection plate as claimed in claim 1, wherein a nickel plate is further disposed on the intelligent lithium battery protection plate, and the nickel plate is connected to the battery pack through a nickel strap by spot welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922499080.0U CN211209345U (en) | 2019-12-31 | 2019-12-31 | Intelligent lithium battery protection plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922499080.0U CN211209345U (en) | 2019-12-31 | 2019-12-31 | Intelligent lithium battery protection plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211209345U true CN211209345U (en) | 2020-08-07 |
Family
ID=71857539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922499080.0U Active CN211209345U (en) | 2019-12-31 | 2019-12-31 | Intelligent lithium battery protection plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211209345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186853A (en) * | 2020-09-30 | 2021-01-05 | 宁波新舜信息科技有限公司 | Power management system with multiple protection |
-
2019
- 2019-12-31 CN CN201922499080.0U patent/CN211209345U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186853A (en) * | 2020-09-30 | 2021-01-05 | 宁波新舜信息科技有限公司 | Power management system with multiple protection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11001165B2 (en) | Battery pack heating apparatus and method of battery pack heating control | |
| US11021064B2 (en) | Battery pack heating apparatus and method of battery pack heating control | |
| CN202190065U (en) | Battery protection circuit | |
| CN209389733U (en) | Lithium battery protection board | |
| US20210328276A1 (en) | Energy storage system | |
| CN107834519A (en) | Lithium battery protection control ASIC chip system | |
| CN112165156A (en) | Charging/discharging device, battery system, charging/discharging control method, and storage medium | |
| CN204144974U (en) | The protection of lithium battery and inversion system | |
| WO2018219029A1 (en) | Combined starting power supply | |
| CN110829585A (en) | Two-way power supply device and power supply system | |
| CN110336357A (en) | A new lithium battery protection board | |
| CN105048607A (en) | Novel multi-output lithium battery power supply device and control method thereof | |
| CN211209345U (en) | Intelligent lithium battery protection plate | |
| CN203339780U (en) | A single battery voltage equalization module | |
| CN107508006B (en) | Automatic balanced battery tray | |
| CN204290423U (en) | Lithium battery charging circuit | |
| CN204167920U (en) | A kind of intelligent distribution transformer terminals | |
| CN211958845U (en) | Two-section lithium battery protection circuit | |
| CN212676926U (en) | Energy storage battery pack with display recording function | |
| CN214380221U (en) | Battery charge and discharge protection device | |
| CN110854953B (en) | Battery charge-discharge protection circuit and battery device | |
| CN205335912U (en) | Battery and mobile terminal | |
| CN109980735B (en) | Lithium cell is with charger trigger circuit | |
| Xiang et al. | A research on charge and discharge strategy of hybrid batteries based on the electrochemical characteristics | |
| CN215344002U (en) | Single-section lithium battery charging double-protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |