CN220627956U - Heat dissipation control circuit of lithium battery of electric motorcycle - Google Patents
Heat dissipation control circuit of lithium battery of electric motorcycle Download PDFInfo
- Publication number
- CN220627956U CN220627956U CN202322279690.6U CN202322279690U CN220627956U CN 220627956 U CN220627956 U CN 220627956U CN 202322279690 U CN202322279690 U CN 202322279690U CN 220627956 U CN220627956 U CN 220627956U
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- China
- Prior art keywords
- lithium battery
- control circuit
- battery shell
- electric
- heat conduction
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 97
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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
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- Secondary Cells (AREA)
Abstract
The utility model relates to a heat dissipation control circuit of a lithium battery of an electric motorcycle, which comprises a lithium battery shell, a positive electrode end, a negative electrode end and a plurality of lithium battery cores, wherein the positive electrode end and the negative electrode end are arranged on the surface of the lithium battery shell; a plurality of air holes are formed in the lithium battery shell; a first temperature sensor is arranged in the lithium battery shell; the device also comprises an electric air pump, a heat conduction air inlet pipe, a heat conduction air outlet pipe, a Hall current sensor and a control circuit board; one end of the heat conduction air inlet pipe extends into the lithium battery shell, and the other end of the heat conduction air inlet pipe is connected with the air inlet end of the electric air pump; one end of the heat conduction exhaust pipe is connected with the air outlet end of the electric air pump; the Hall current sensor is arranged at the positive electrode end to detect current; the control circuit board is integrated with a power interface, a DC-AC converter, a processor and a PWM frequency conversion circuit; and the electronic components are connected in a matched manner. The heat dissipation control circuit of the lithium battery of the electric motorcycle can intelligently monitor the heating temperature of the lithium battery and intelligently cool.
Description
Technical Field
The utility model relates to the technical field of heat dissipation equipment of batteries, in particular to a heat dissipation control circuit of a lithium battery of an electric motorcycle.
Background
The lithium battery of the electric motorcycle is generally placed in a battery groove below the cushion of the electric motorcycle, and the battery groove is not a closed space, but has poor air fluidity and is not beneficial to heat dissipation. The lithium battery has internal resistance, so that after the lithium battery is electrified, heat energy is generated by the lithium battery so that the temperature of the lithium battery is increased. If the lithium battery is powered on for a long time at a high temperature higher than 60 degrees celsius (generally, the ambient temperature will not be higher than 60 degrees celsius, in most cases, the temperature of the lithium battery will be higher than 60 degrees celsius only after the lithium battery is powered on, which will cause expansion and swelling of the lithium battery, affect the service life of the lithium battery, and even cause explosion of the lithium battery.
Therefore, if the temperature of the lithium battery can be controlled to be higher than the temperature threshold (for example, 60 ℃) after the lithium battery is electrified, the swelling of the lithium battery can be greatly reduced. The service life and the safety performance of the lithium battery can be greatly improved. Based on this, this scheme provides an electric motorcycle car lithium cell heat dissipation control circuit, can intelligent monitoring lithium cell heating temperature to intelligence is cooled down.
Disclosure of Invention
Therefore, aiming at the problems, the utility model provides the heat dissipation control circuit of the lithium battery of the electric motorcycle, which can intelligently monitor the heating temperature of the lithium battery and intelligently cool the lithium battery.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the heat dissipation control circuit of the lithium battery of the electric motorcycle comprises a lithium battery shell, a positive electrode end, a negative electrode end and a plurality of lithium battery cores, wherein the positive electrode end and the negative electrode end are arranged on the surface of the lithium battery shell, the lithium battery cores are arranged in the lithium battery shell at intervals, the positive electrode of each lithium battery core is connected with the positive electrode end in parallel, and the negative electrode of each lithium battery core is connected with the negative electrode end in parallel;
a plurality of air holes are formed in the periphery and the bottom of the lithium battery shell;
a first temperature sensor is arranged in the lithium battery shell;
the electric air pump comprises an air inlet end and an air outlet end;
one end of the heat conduction air inlet pipe extends into the lithium battery shell, and the other end of the heat conduction air inlet pipe is connected with the air inlet end of the electric air pump;
one end of the heat conduction exhaust pipe is connected with the air outlet end of the electric air pump;
the Hall current sensor is arranged at the positive electrode end to detect current;
the control circuit board is integrated with a power interface, a DC-AC converter, a processor and a PWM frequency conversion circuit;
the positive pole end and the negative pole end are electrically connected with a power interface, the power interface is electrically connected with the power end of the processor, the power interface is electrically connected with the electric air pump sequentially through the DC-AC converter and the PWM frequency conversion circuit, and the first temperature sensor, the Hall current sensor and the PWM frequency conversion circuit are respectively electrically connected with the processor.
Further, the lithium battery shell also comprises a second temperature sensor, wherein the second temperature sensor is arranged outside the lithium battery shell;
the second temperature sensor is electrically connected with the processor.
By adopting the technical scheme, the utility model has the beneficial effects that:
this electric motorcycle car lithium cell heat dissipation control circuit detects the temperature in the lithium cell casing through first temperature sensor to detect the electric current size transmission that each lithium cell core output through hall current sensor and give the treater, treater calculates the calorific capacity Q of lithium cell core (Q=I 2 Rt, wherein R is the total internal resistance of each lithium battery core, the calculation formula is a well known technology in the art), if the temperature in the lithium battery shell exceeds a temperature threshold (such as 60 ℃), the processor adjusts the output current frequency of the PWM frequency conversion circuit according to the magnitude of the heating value Q, and then controls the air extraction rate of the electric air pump, and cold air in the environment is introduced into the lithium battery shell through air holes on the lithium battery shell to cool each lithium battery core. And the hot air pumped by the electric air pump is discharged through the heat conduction exhaust pipe, and when the electric air pump is specifically arranged, the heat conduction exhaust pipe can be connected to the outside of a battery tank of the electric motorcycle, so that the aim of heat dissipation is fulfilled.
Further, the second temperature sensor is used for detecting the external environment temperature (the temperature in the battery groove of the electric motorcycle), the processor is used for adjusting the output current frequency of the PWM frequency conversion circuit according to the external environment temperature and the heating value Q of each lithium battery core, and then the air extraction rate of the electric air pump is controlled to cool each lithium battery core.
Drawings
Fig. 1 is a schematic structural view of a lithium battery case.
Fig. 2 is a sectional view of a lithium battery case.
Fig. 3 is a circuit connection block diagram of the lithium battery heat dissipation control circuit of the electric motorcycle.
Detailed Description
The utility model will now be further described with reference to the drawings and detailed description.
Referring to fig. 1, 2 and 3, the present embodiment provides a heat dissipation control circuit for a lithium battery of an electric motorcycle, which includes a lithium battery case 1, a positive electrode terminal 11 and a negative electrode terminal 12 disposed on a surface of the lithium battery case 1, and a plurality of lithium battery cores 10 disposed in the lithium battery case 1 at intervals, wherein a positive electrode (not shown in the drawings) of each of the lithium battery cores 10 is connected in parallel to the positive electrode terminal 11, and a negative electrode (not shown in the drawings) of each of the lithium battery cores 1 is connected in parallel to the negative electrode terminal 12. The structure of the lithium battery shell 1 is the structure of the lithium battery of the existing electric motorcycle, and detailed description is omitted here.
In use, the lithium battery case 1 is mounted inside a battery case (not shown) of an electric motorcycle.
The improvement point of the scheme is as follows:
a plurality of air holes 13 are formed in the periphery and the bottom of the lithium battery shell 1, and air in a battery groove of the electric motorcycle is introduced into the lithium battery shell 1 through the air holes 13.
The device also comprises a first temperature sensor 2, an electric air pump 3, a heat conduction air inlet pipe 4, a heat conduction air outlet pipe 5, a control circuit board 6, a second temperature sensor 7 and a Hall current sensor 8.
The first temperature sensor 2 is provided in the lithium battery case 1 for detecting the temperature in the lithium battery case 1 and transmitting it to the processor 61.
The second temperature sensor 7 is disposed in a battery compartment (not shown) of the electric motorcycle, and is configured to detect a temperature in the battery compartment of the electric motorcycle.
The electric air pump 3 comprises an air inlet end (marked in the figure) and an air outlet end (marked in the figure).
One end of the heat conduction air inlet pipe 4 extends into the lithium battery shell 1, and the other end of the heat conduction air inlet pipe 4 is connected with an air inlet end of the electric air pump 3.
One end of the heat conduction exhaust pipe 5 is connected with the air outlet end of the electric air pump 3, and the other end of the heat conduction exhaust pipe 5 extends out of a battery jar of the electric motorcycle to prevent hot air exhausted by the heat conduction exhaust pipe 5 from being accumulated in the battery jar.
The hall current sensor 8 is disposed at the positive terminal 11 (not shown in the figure) to detect the current and transmit the detected current to the processor 61, and the installation method of the hall current transformer 8 is a conventional technology, which is not described in detail herein.
The control circuit board 6 is integrated with a processor 61, a power interface 62, a DC-AC converter 63, and a PWM frequency conversion circuit 64. The processor 61, the power interface 62, the DC-AC converter 63, the PWM frequency conversion circuit 64, the first temperature sensor 2, the second temperature sensor 7, and the hall current sensor 8 are all existing electronic devices in the art, and those skilled in the art should be provided with a conventional option of the electronic devices. The heat dissipation control circuit of the lithium battery of the electric motorcycle is reproduced through the matching connection of the electronic equipment, and the technology is known in the art and is not described in detail herein.
The positive electrode terminal 11 and the negative electrode terminal 12 are electrically connected with a power interface 62, and the power interface 62 is electrically connected with a power terminal of the processor 61 to supply power to the processor 61.
The power interface 62 is electrically connected with the electric air pump 3 through the DC-AC converter 63 and the PWM frequency conversion circuit 64 in sequence, and the PWM frequency conversion circuit 64 is electrically connected with the processor 61. The processor 61 controls the PWM frequency conversion circuit 64 to output alternating current frequency, so that the pumping rate of the electric air pump 3 is controlled.
The first temperature sensor 2, the second temperature sensor 7, and the hall current sensor 8 are electrically connected to the processor 61, respectively.
The processor 61 calculates the heat generation amount Q (q=i) of the lithium battery cell 10 based on the magnitude of the current detected by the hall current sensor 8 2 Rt, wherein R is the sum of the internal resistances of the lithium battery cells, and the calculation formula is known in the art), if the temperature in the lithium battery case 1 exceeds a temperature threshold (e.g. 60 degrees centigrade), the processor 61 detects the electricity according to the second temperature sensor 7The temperature of the environment in the battery tank and the heating value Q of the lithium battery core body regulate the output current frequency of the PWM frequency conversion circuit 64, and then the air extraction rate of the electric air pump 3 is controlled, and cold air in the battery tank is introduced into the lithium battery shell 1 through the air hole 13 on the lithium battery shell 1 to cool each lithium battery core body 10. And the hot air pumped by the electric air pump 3 is discharged through the heat conduction exhaust pipe 5, so that the purpose of heat dissipation is achieved.
The advantage of this scheme is, the steam that electronic air pump 3 was taken out is directly arranged outside the battery jar, can not cause the steam to gather, powerful heat dissipation. In addition, the air extraction rate of the electric air pump 3 is adjusted according to the internal environment temperature in the battery tank and the heating value Q of the lithium battery core body, and the electric air pump is not operated at full power, so that energy conservation is facilitated.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (2)
1. The heat dissipation control circuit of the lithium battery of the electric motorcycle comprises a lithium battery shell, a positive electrode end, a negative electrode end and a plurality of lithium battery cores, wherein the positive electrode end and the negative electrode end are arranged on the surface of the lithium battery shell, the lithium battery cores are arranged in the lithium battery shell at intervals, the positive electrode of each lithium battery core is connected with the positive electrode end in parallel, and the negative electrode of each lithium battery core is connected with the negative electrode end in parallel;
the method is characterized in that:
a plurality of air holes are formed in the periphery and the bottom of the lithium battery shell;
a first temperature sensor is arranged in the lithium battery shell;
the electric air pump comprises an air inlet end and an air outlet end;
one end of the heat conduction air inlet pipe extends into the lithium battery shell, and the other end of the heat conduction air inlet pipe is connected with the air inlet end of the electric air pump;
one end of the heat conduction exhaust pipe is connected with the air outlet end of the electric air pump;
the Hall current sensor is arranged at the positive electrode end to detect current;
the control circuit board is integrated with a power interface, a DC-AC converter, a processor and a PWM frequency conversion circuit;
the positive pole end and the negative pole end are electrically connected with a power interface, the power interface is electrically connected with the power end of the processor, the power interface is electrically connected with the electric air pump sequentially through the DC-AC converter and the PWM frequency conversion circuit, and the first temperature sensor, the Hall current sensor and the PWM frequency conversion circuit are respectively electrically connected with the processor.
2. The electric motorcycle lithium battery heat dissipation control circuit as set forth in claim 1, wherein: the lithium battery shell also comprises a second temperature sensor, wherein the second temperature sensor is arranged outside the lithium battery shell;
the second temperature sensor is electrically connected with the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322279690.6U CN220627956U (en) | 2023-08-23 | 2023-08-23 | Heat dissipation control circuit of lithium battery of electric motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322279690.6U CN220627956U (en) | 2023-08-23 | 2023-08-23 | Heat dissipation control circuit of lithium battery of electric motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220627956U true CN220627956U (en) | 2024-03-19 |
Family
ID=90213729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322279690.6U Active CN220627956U (en) | 2023-08-23 | 2023-08-23 | Heat dissipation control circuit of lithium battery of electric motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220627956U (en) |
-
2023
- 2023-08-23 CN CN202322279690.6U patent/CN220627956U/en active Active
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