CN217405646U - Electric bicycle's battery of explosion electric bicycle is caught fire in prevention - Google Patents
Electric bicycle's battery of explosion electric bicycle is caught fire in prevention Download PDFInfo
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- CN217405646U CN217405646U CN202220082322.5U CN202220082322U CN217405646U CN 217405646 U CN217405646 U CN 217405646U CN 202220082322 U CN202220082322 U CN 202220082322U CN 217405646 U CN217405646 U CN 217405646U
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a battery of an electric bicycle for preventing fire and explosion, which comprises a power supply unit and a control unit; the power supply unit comprises a battery pack formed by connecting a plurality of battery cells in series, and the battery packs are connected with the control unit; the control unit comprises a controller and a load end, and the controller switches the battery pack to be output to the load end in parallel or independently according to the electric quantity of the power supply unit. The utility model discloses a battery of prevention explosion on fire electric bicycle, the group battery is by original series-parallel structure, changes into the group battery that only series structure. The controller switches the battery packs to be output to the load end in parallel or independently according to the electric quantity. Through independently exporting load end wheel flow switching group battery output, realize voltage balance between the group battery, improve the utilization ratio of battery, improve the life of battery, improve the protection of controller to the battery, effectively prevent accidents such as battery fire, explosion.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to prevention explosion on fire electric bicycle's battery.
Background
With the increasing energy crisis and environmental pollution, the trend of developing and developing electric vehicles, the vigorous development and the great prospect of the electric vehicles are promoted in all countries around the world, and the development of the electric vehicle battery industry is promoted. Under the huge development prospect, accidents caused by more and more electric vehicles are reported, and the safety performance of the electric vehicle battery is more and more concerned by people. The electric vehicle battery mainly comprises a lithium battery pack and a protective plate, the lithium ion battery needs a special safety protection circuit when in use, otherwise, the battery can explode. The protection function of the circuit board for the battery basically comprises overcharge protection, overdischarge protection, overcurrent protection, short circuit protection and the like. The safety performance of the battery of the electric vehicle is improved by improving the protection capability of the protection plate on the battery besides continuously improving the production quality of the battery.
The battery pack of the existing electric vehicle is formed by series-parallel connection, after long-time use, the internal resistance and the voltage of the battery pack are inconsistent, and the larger the voltage difference between a high-voltage battery and a low-voltage battery unit is, the larger the discharging current is. Under severe conditions, the battery unit with overlarge discharge current can be damaged by overcurrent, the whole service life is influenced, and the electric energy of the battery is wasted to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to improve the protective capacities of circuit board to the battery, improve the security performance that the battery used, improve the availability factor of battery, technical scheme is as follows:
a battery of an electric bicycle for preventing fire and explosion comprises a power supply unit and a control unit; the power supply unit comprises a battery pack formed by connecting a plurality of battery cells in series, and the battery packs are connected with the control unit; the control unit comprises a controller and a load end, and the controller switches the battery pack to be output to the load end in parallel or independently according to the electric quantity of the power supply unit.
Further, the control unit further comprises a voltage detection module; the voltage detection module detects the voltage of the battery pack and feeds the voltage back to the controller, and the controller calculates the electric quantity of the power supply unit according to the voltage of the battery pack.
Further, the control unit further comprises a current detection module, and the current detection module detects the current of the battery pack and the current of the load end and feeds the current back to the controller; the voltage detection module is also used for detecting the voltage of the load end and feeding the voltage back to the controller; the controller controls the power supply unit to charge, discharge or stop working according to the current of the battery pack, the voltage of the battery pack, the current of the load end and/or the voltage of the load end.
Further, the control unit comprises a bluetooth module, and the bluetooth module sends information of the controller to a client, wherein the information comprises current and voltage of the battery pack and current and voltage of the load end.
Further, the client comprises a mobile phone APP.
Further, the battery pack and the control unit are connected through a mos tube.
Compared with the prior art, the utility model discloses beneficial effect is:
the utility model discloses a battery of prevention explosion on fire electric bicycle, the group battery is by original series-parallel structure, changes into the group battery that only series structure. The controller switches the battery packs according to the electric quantity and outputs the battery packs to the load end in parallel or independently outputs the battery packs to the load end. Through independently exporting load end wheel flow switching group battery output, realize voltage balance between the group battery, improve the utilization ratio of battery, improve the life of battery, improve the protection of controller to the battery, effectively prevent accidents such as battery fire, explosion. By monitoring the current and the voltage, abnormal conditions are found in time, and the circuit is turned off in time to protect the battery and the circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of a battery of an electric bicycle for preventing fire and explosion according to the present invention;
fig. 2 is a schematic view of a cycle output mode of a battery of an electric bicycle for preventing fire and explosion according to the present invention;
fig. 3 is a schematic diagram of a switching mode of a battery of an electric bicycle for preventing fire and explosion according to the present invention;
fig. 4 is a schematic view of the overcharge protection of the battery of the electric bicycle for preventing fire and explosion according to the present invention;
fig. 5 is a schematic diagram illustrating over-discharge protection of the battery of the electric bicycle for preventing fire and explosion according to the present invention;
fig. 6 is a schematic view of the overcurrent protection of the battery of the electric bicycle for preventing fire and explosion according to the present invention;
fig. 7 is a schematic diagram of the short-circuit protection of the battery of the electric bicycle for preventing fire and explosion according to the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.
When the battery is used, the situation that the voltages of the batteries are inconsistent due to different discharge electric quantities may occur among the batteries in the battery pack, and the battery packs in the market are formed by connecting a plurality of battery cores in parallel into groups and then connecting a plurality of groups of battery cores in series into a circuit board. Because of the parallel relationship between the internal batteries, the battery with higher voltage will charge the battery with lower voltage. The utility model discloses a plurality of electric cores of group battery establish ties in groups the back, and the circuit board is inserted respectively to the multiunit. The battery pack only has a series connection relation, so that the charging problem among the batteries in the battery pack can be avoided, and the electric energy waste caused by charging of the batteries in the batteries is avoided.
Concretely, a battery of an electric bicycle for preventing fire and explosion comprises a power supply unit and a control unit, wherein the control unit is a circuit board. The power supply unit comprises a battery pack formed by connecting a plurality of battery cells in series, and the battery packs are connected with the control unit. The control unit comprises a controller and a load end, and the controller switches the battery pack to be output to the load end in parallel or independently according to the electric quantity of the power supply unit. As shown in fig. 1 and 2, a plurality of battery cells are connected in series to form a battery pack, and the positive and negative poles of three groups of battery packs are respectively connected to the control unit. When the electric quantity of the power supply unit is more than 80%, the controller enters a parallel output mode, the controller opens the three battery packs, and the three battery packs are output to a load end in parallel; when the electric quantity of the power supply unit is less than 80%, the controller enters a circulation output mode, and the controller alternately switches the three batteries to independently output current to the load end. The voltage between the batteries is balanced by switching the output of the battery pack in turn to realize the voltage balance between the batteries.
In the present embodiment, as shown in fig. 2, the battery pack and the control unit are connected by a mos tube. The step of the circulation output mode is as follows: the controller controls the MOS tube to open the first battery and close the MOS tubes of the other two batteries; the circuit is closed after the battery pack is powered on for a certain time, and meanwhile, the second path of battery is powered on, so that the second path of battery is powered off after the same time; opening the third path of batteries again to enable the batteries to be powered off after the same time; and repeatedly opening the first path of battery circuit and keeping the circuit to stably output voltage.
In this embodiment, the control unit further comprises a voltage detection module and a current detection module. The voltage detection module detects the voltage of the battery pack and the voltage of the load end and feeds the voltage back to the controller, and the current detection module detects the current of the battery pack and the current of the load end and feeds the current back to the controller. The controller reads the voltage and current of the three-way battery pack and the voltage and current of the load, and when the voltage or current is found to be abnormal, the controller timely turns off the circuit to protect the battery.
Specifically, the controller judges the electric quantity of the power supply unit according to the voltage of the battery pack. As shown in fig. 3, the controller first determines whether the voltage at the load end is greater than a set load voltage value. If the voltage value is larger than the load voltage value, the controller opens the charging circuit and enters a charging mode. If the voltage value is smaller than the load voltage value, the controller opens the discharge circuit and enters a discharge mode; the controller judges whether the voltage of the battery pack is larger than a set battery pack voltage value or not, if the voltage of the battery pack is larger than the set battery pack voltage value, namely the electric quantity of the power supply unit is larger than 80%, the controller enters a parallel connection output mode, the controller opens the three battery packs, and the three battery packs are connected in parallel and output to a load end; if the voltage value of the battery pack is smaller than the voltage value of the battery pack, namely the electric quantity of the power supply unit is smaller than 80%, the controller enters a circulating output mode, and the controller alternately converts the three batteries to independently output current to a load end.
Overcharge or overdischarge protection: as shown in fig. 4, the controller reads the voltages of the three battery packs, if the voltages of the battery packs are greater than the set full voltage value, the battery is overcharged, the controller turns off the charging circuit, and overcharge protection is performed to prevent the battery from being overcharged, so that the battery is prevented from being damaged or exploding; otherwise, the battery is charged normally. As shown in fig. 5, if the voltage of the battery pack is lower than the set voltage too low value, the battery voltage is too low, the controller turns off the output circuit, and the battery is over-discharged for protection, thereby preventing the battery from being used excessively and damaging the battery; otherwise, the battery is normally discharged to work.
Overcurrent protection or short-circuit protection: as shown in fig. 6, if the current of the battery pack is greater than the set maximum current value, the line current is too large, the controller closes the output loop, and the overcurrent protection is performed to avoid the battery pack and the control unit from being damaged by the too large current; otherwise, the battery works normally. As shown in fig. 7, if the current at the load end is instantaneously greater than the set maximum current value, the circuit is short-circuited, the controller closes the output loop, and overcurrent protection is performed; otherwise, the battery works normally.
In this embodiment, when the controller turns off the output or charging circuit, the controller will turn on the circuit again in 30 seconds or 60 seconds, and again detect whether the circuit is abnormal. If the current of the battery pack, the voltage of the battery pack, the current of the load end or the voltage of the load end is abnormal, the controller closes the circuit again in time, and the operation is repeated.
In this embodiment, the controller constantly reads the voltage and the current of three-way battery pack and the voltage and the current of load, judges that the power supply unit charges, discharges or stops working, and the bluetooth module sends the information that the controller read and judged to the client, for example, cell-phone APP, and the user can look over battery state and abnormal conditions, and when the user finds that the battery of the electric vehicle is constantly and repeatedly switched on and off, thereby finding that the battery is in abnormal conditions, in time, the electric vehicle is shut down and maintained.
The utility model discloses a battery of prevention explosion on fire electric bicycle, the group battery is by original series-parallel structure, changes into the group battery that only series structure. The controller switches the parallel output mode and the cyclic output mode according to the electric quantity, and switches the output of the battery pack in turn through the cyclic output mode, so that the voltage balance among the battery packs is realized, the utilization rate of the battery is improved, the service life of the battery is prolonged, the protection of the controller on the battery is improved, and accidents such as fire and explosion of the battery are effectively prevented. By monitoring the current and the voltage, abnormal conditions are found in time, and the circuit is turned off in time to protect the battery and the circuit.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
The above description is for illustrative purposes only and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. that do not depart from the spirit and principles of the present invention should be construed as within the scope of the present invention.
Claims (5)
1. A battery of an electric bicycle for preventing fire and explosion is characterized by comprising a power supply unit and a control unit; the power supply unit comprises a battery pack formed by connecting a plurality of battery cells in series, and the battery packs are connected with the control unit; the control unit comprises a controller and a load end, and the controller switches the battery pack to be output to the load end in parallel or independently according to the electric quantity of the power supply unit.
2. The battery for electric bicycles for preventing fire explosion according to claim 1, wherein the control unit further comprises a voltage detection module; the voltage detection module detects the voltage of the battery pack and feeds the voltage back to the controller, and the controller calculates the electric quantity of the power supply unit according to the voltage of the battery pack.
3. The battery for electric bicycles for preventing fires and explosions as claimed in claim 2, wherein the control unit further comprises a current detection module that detects the current of the battery pack and the current of the load terminal and feeds back the detected currents to the controller; the voltage detection module is also used for detecting the voltage of the load end and feeding the voltage back to the controller; the controller controls the power supply unit to charge, discharge or stop working according to the current of the battery pack, the voltage of the battery pack, the current of the load end and/or the voltage of the load end.
4. The battery for electric bicycles for preventing fires and explosions as claimed in claim 3, wherein the control unit comprises a Bluetooth module, and the Bluetooth module transmits information of the controller to a client, wherein the information comprises the current and voltage of the battery pack and the current and voltage of the load.
5. The battery for electric bicycles for preventing fire and explosion according to claim 1, wherein the battery pack and the control unit are connected through a mos tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220082322.5U CN217405646U (en) | 2022-01-11 | 2022-01-11 | Electric bicycle's battery of explosion electric bicycle is caught fire in prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220082322.5U CN217405646U (en) | 2022-01-11 | 2022-01-11 | Electric bicycle's battery of explosion electric bicycle is caught fire in prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217405646U true CN217405646U (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220082322.5U Active CN217405646U (en) | 2022-01-11 | 2022-01-11 | Electric bicycle's battery of explosion electric bicycle is caught fire in prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217405646U (en) |
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2022
- 2022-01-11 CN CN202220082322.5U patent/CN217405646U/en active Active
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