CN216016485U - Circuit for preventing lithium battery from generating peak voltage when being fully charged and instantly charging equipment - Google Patents
Circuit for preventing lithium battery from generating peak voltage when being fully charged and instantly charging equipment Download PDFInfo
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- CN216016485U CN216016485U CN202122104862.7U CN202122104862U CN216016485U CN 216016485 U CN216016485 U CN 216016485U CN 202122104862 U CN202122104862 U CN 202122104862U CN 216016485 U CN216016485 U CN 216016485U
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- charging equipment
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 53
- 239000003990 capacitor Substances 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model relates to a battery charging protection technical field discloses a prevent that lithium cell from being full of the circuit that charging equipment produced peak voltage in the twinkling of an eye that charges, include: the standard working voltage after series connection of the plurality of super capacitors is higher than the charging voltage of the lithium battery, and the plurality of super capacitors are connected in parallel to the positive and negative terminals of the lithium battery charging equipment. A circuit is formed by a plurality of strings of super capacitors and is connected in parallel at the two ends of the anode and the cathode of the charging equipment to form a direct current load with voltage for a long time and a capacitor battery. When the BMS initiates power-off protection in the moment that the lithium battery is fully charged, the charging equipment can still detect that the direct current output end has battery voltage, the internal voltage detection circuit and the voltage stabilizing circuit work normally, and the charging equipment outputs charging voltage normally, so that peak high voltage is not generated any more.
Description
Technical Field
The utility model relates to a battery charging protection technical field especially relates to a prevent that lithium cell is full of electricity charging equipment in the twinkling of an eye from producing peak voltage's circuit.
Background
The energy storage power supply of special vehicles and internal combustion engine type automobiles, originally, lead acid batteries and charging and inverting integrated machines are mostly used to form an emergency and inverting power supply, in recent years, lithium batteries are widely applied due to the advantages of small size, light weight and no environmental pollution, and charging equipment of the energy storage power supply is wide in source and comprises the following components which are not limited to common in the market at present: the vehicle-mounted second generator, the charging and inverting integrated machine, the charger, the MPPT and the external fuel generator. However, at the moment that the 12V-144V lithium battery is fully charged, the internal BMS can directly cut off the internal soft/hardware switch of the lithium battery to protect the safety of the internal lithium battery, and the positive electrode and the negative electrode of the lithium battery have no voltage. At the moment, the charging equipment cannot detect the voltage at the battery end, the internal circuit cannot adjust or interrupt the output charging voltage in time, and the voltage higher than the original charging voltage is generated instantaneously, so that the sound-light alarm of the charging equipment is continuous, the high-voltage sound-light alarm of the direct-current load is continuous, the direct-current load is seriously damaged, and the normal use and safety of the vehicle are influenced.
BMS (Battery MANAGEMENT SYSTEM) is called a BATTERY management system. The BMS is mainly to intelligently manage and maintain each string of battery cells, prevent overcharge, overdischarge, high temperature of the battery, and short circuit of the battery, extend the service life of the battery, and monitor the state of the battery.
In the prior art, the anode and the cathode of a 12V-144V lithium battery are commonly connected with one or a set of lead-acid batteries with the same voltage or surge absorber equipment in the market in parallel to solve the problem of high voltage generated by charging equipment instantly. However, lead-acid batteries have short service life, particularly lead-acid batteries have large volume and large voltage self-consumption, and when the batteries are not charged for a long time and the voltage is close to or equal to zero volt, the lead-acid batteries cannot be reversed and damaged. Lead-acid batteries must be replaced for many times within the service life of a vehicle, so that financial and manpower losses are very large, and the lead-acid batteries are very inconvenient to disassemble and assemble. The surge absorber equipment has small absorption energy, or some voltage transfer equipment has low transmission speed, cannot be effectively used on line for a long time, and has limited absorption moment high voltage.
Therefore, it is an urgent technical problem to provide a circuit for preventing the charging device from generating the peak voltage at the moment of full charge of the lithium battery.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in how to provide a circuit that prevents that the lithium cell from being full of the electricity charging equipment in the twinkling of an eye from producing peak voltage.
Therefore, according to the first aspect, the embodiment of the utility model discloses a prevent that lithium cell from being full of the circuit that the charging equipment produced peak voltage in the twinkling of an eye that charges, include: the standard working voltage after series connection of the plurality of super capacitors is higher than the charging voltage of the lithium battery, and the plurality of super capacitors are connected in parallel to the positive and negative terminals of the lithium battery charging equipment.
The utility model discloses further set up to, the circuit that 12.8V lithium cell corresponds uses 6 cluster 2.5V or 2.7V's super capacitor, or uses 5 cluster 3.0V super capacitor.
The utility model discloses further set up to, the circuit that 25.6V lithium cell corresponds uses 12 strings 2.5V super capacitor, uses 10 strings 3.0V super capacitor, uses 11 strings 2.7V super capacitor or 12 strings 2.7V super capacitor.
The utility model discloses further set up to, the circuit that 48V lithium cell corresponds uses 22 cluster 2.5V super capacitor, 21 cluster 2.7V super capacitor or 19 cluster 3.0V super capacitor.
The utility model discloses further set up to, the circuit that 51.2V lithium cell corresponds uses 24 cluster 2.5V super capacitor, 22 cluster 2.7V super capacitor or 20 cluster 3.0V super capacitor.
The utility model discloses further set up to, super capacitor is last to be connected in parallel to have and is used for preventing the equalizer circuit that superpressure electric capacity overvoltage damaged.
The utility model discloses following beneficial effect has: a circuit is formed by a plurality of strings of super capacitors and is connected in parallel at the two ends of the anode and the cathode of the charging equipment to form a direct current load with voltage for a long time and a capacitor battery. When the BMS initiates power-off protection in the moment that the lithium battery is fully charged, the charging equipment can still detect that the direct current output end has battery voltage, the internal voltage detection circuit and the voltage stabilizing circuit work normally, and the charging equipment outputs charging voltage normally, so that peak high voltage is not generated any more.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram illustrating a circuit for preventing a charging device from generating a peak voltage at the moment when a lithium battery is fully charged according to the present embodiment;
fig. 2 is a schematic diagram of an application of a circuit for preventing a charging device from generating a peak voltage at the moment when a lithium battery is fully charged according to the embodiment.
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.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model discloses prevent that lithium cell from being full of circuit that battery charging outfit produced peak voltage in the twinkling of an eye, as shown in FIG. 1, include: the standard working voltage after series connection of the plurality of super capacitors is higher than the charging voltage of the lithium battery, and the plurality of super capacitors are connected in parallel to the positive and negative terminals of the lithium battery charging equipment.
It should be noted that, a circuit is formed by multiple strings of super capacitors, and the circuit is connected in parallel to the positive and negative terminals of the charging device, and becomes a direct current load and a capacitor battery with long-time voltage. When the BMS initiates power-off protection in the moment that the lithium battery is fully charged, the charging equipment can still detect that the direct current output end has battery voltage, the internal voltage detection circuit and the voltage stabilizing circuit work normally, and the charging equipment outputs charging voltage normally, so that peak high voltage is not generated any more.
It should also be noted that the circuit formed by multiple strings of super capacitors can also be connected in parallel to the energy storage lithium battery charging equipment of special vehicles and internal combustion engine automobiles. The application vehicle of the special automobile energy storage lithium battery comprises: limousine, motor caravan, medical vehicle, police car, detection vehicle and communication command vehicle. And internal combustion engine type automobiles. The string number of the super capacitors is set according to the charging voltage of the lithium batteries, and is smaller than the nominal voltage of the super capacitors after being connected in series and slightly higher than the charging voltage of the lithium batteries.
In the specific implementation process, a circuit corresponding to a 12.8V lithium battery uses 6 strings of 2.5V or 2.7V super capacitors, or uses 5 strings of 3.0V super capacitors.
In the specific implementation process, a circuit corresponding to the 25.6V lithium battery uses 12 strings of 2.5V super capacitors, 10 strings of 3.0V super capacitors, 11 strings of 2.7V super capacitors or 12 strings of 2.7V super capacitors.
In the specific implementation process, 22 strings of 2.5V super capacitors, 21 strings of 2.7V super capacitors or 19 strings of 3.0V super capacitors are used for the circuit corresponding to the 48V lithium battery.
In the specific implementation process, a circuit corresponding to the 51.2V lithium battery uses 24 strings of 2.5V super capacitors, 22 strings of 2.7V super capacitors or 20 strings of 3.0V super capacitors.
In the specific implementation process, an equalizing circuit for preventing overvoltage damage of the overvoltage capacitor is connected in parallel to the super capacitor.
Fig. 2 is a schematic diagram of an application of a circuit for preventing a charging device from generating a peak voltage at the moment when a lithium battery is fully charged according to the embodiment. As shown in figure 2, the direct current equipment on the vehicle has no damage risk, the charging and inverting integrated machine of the charging equipment can not generate high-voltage sound-light alarm, the vehicle-mounted second generator can not be damaged for a long time due to no load, and the vehicle-mounted direct current load LED lamp and the like can not be stroboscopic.
The circuit for preventing lithium battery full charge instant charging equipment from generating peak voltage disclosed by the embodiment has the following advantages:
(1) lead-acid batteries have short service life, are large in size and have high voltage self-consumption, and when the batteries are not charged for a long time and the voltage is close to or equal to zero voltage, the lead-acid batteries cannot be reversed and damaged, and need to be replaced for many times within the life time of a vehicle, so that a large amount of financial affairs and manpower are wasted.
(2) The surge absorber has small absorbed energy, and some voltage transfer equipment has low transmission speed, both of which can not be effectively used on line for a long time, and the absorbed transient high-voltage energy is limited.
(3) The circuit has the characteristics of high cycle, long service life, wide temperature range, normal use after zero-voltage recharging, random number of the rechargeable battery, capability of meeting the voltage of various lithium batteries, and capability of being connected with charging equipment in parallel for a long time and working on line.
The working principle is as follows: a circuit is formed by a plurality of strings of super capacitors and is connected in parallel at the two ends of the anode and the cathode of the charging equipment to form a direct current load with voltage for a long time and a capacitor battery. When the BMS initiates power-off protection in the moment that the lithium battery is fully charged, the charging equipment can still detect that the direct current output end has battery voltage, the internal voltage detection circuit and the voltage stabilizing circuit work normally, and the charging equipment outputs charging voltage normally, so that peak high voltage is not generated any more.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. 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. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (6)
1. A circuit for preventing a charging device from generating a peak voltage when a lithium battery is fully charged, comprising: the standard working voltage after series connection of the plurality of super capacitors is higher than the charging voltage of the lithium battery, and the plurality of super capacitors are connected in parallel to the positive and negative terminals of the lithium battery charging equipment.
2. The circuit for preventing the peak voltage generated by the charging equipment during the moment when the lithium battery is fully charged according to claim 1, wherein the circuit corresponding to the 12.8V lithium battery uses 6 strings of 2.5V or 2.7V super capacitors, or uses 5 strings of 3.0V super capacitors.
3. The circuit for preventing the peak voltage generated by the charging equipment at the moment of full charge of the lithium battery as claimed in claim 1, wherein the circuit corresponding to the 25.6V lithium battery uses 12 strings of 2.5V super capacitors, 10 strings of 3.0V super capacitors, 11 strings of 2.7V super capacitors or 12 strings of 2.7V super capacitors.
4. The circuit for preventing the peak voltage generated by the charging equipment during the moment when the lithium battery is fully charged according to claim 1, wherein the circuit corresponding to the 48V lithium battery uses 22 strings of 2.5V super capacitors, 21 strings of 2.7V super capacitors or 19 strings of 3.0V super capacitors.
5. The circuit for preventing the peak voltage generated by the charging equipment during the moment when the lithium battery is fully charged according to claim 1, wherein the circuit corresponding to the 51.2V lithium battery uses 24 strings of 2.5V super capacitors, 22 strings of 2.7V super capacitors or 20 strings of 3.0V super capacitors.
6. The circuit for preventing the peak voltage generated by the charging equipment at the moment of full charge of the lithium battery as claimed in any one of claims 1 to 5, wherein an equalizing circuit for preventing the overvoltage capacitor from being damaged due to overvoltage is connected in parallel to the super capacitor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021212689307 | 2021-06-08 | ||
| CN202121268930 | 2021-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216016485U true CN216016485U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122104862.7U Active CN216016485U (en) | 2021-06-08 | 2021-09-01 | Circuit for preventing lithium battery from generating peak voltage when being fully charged and instantly charging equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216016485U (en) |
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2021
- 2021-09-01 CN CN202122104862.7U patent/CN216016485U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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Address after: 518000 4th floor, building 2, jinshengtao Industrial Park, 242 hongmiansan Road, Henggang street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhongke Jiuming New Energy Technology Co.,Ltd. Address before: 518000 4th floor, building 2, jinshengtao Industrial Park, 242 hongmiansan Road, Henggang street, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhongke Jiuming New Energy Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231103 Address after: Room 401, Building 2, No. 242 Hongmian Third Road, Bao'an Community, Yuanshan Street, Longgang District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Jialimei Intelligent Technology Co.,Ltd. Address before: 518000 4th floor, building 2, jinshengtao Industrial Park, 242 hongmiansan Road, Henggang street, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhongke Jiuming New Energy Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |