CN213816258U - Low temperature battery pack heating device based on LC resonance - Google Patents
Low temperature battery pack heating device based on LC resonance Download PDFInfo
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- CN213816258U CN213816258U CN202120052441.1U CN202120052441U CN213816258U CN 213816258 U CN213816258 U CN 213816258U CN 202120052441 U CN202120052441 U CN 202120052441U CN 213816258 U CN213816258 U CN 213816258U
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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
- 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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- 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 low temperature battery pack heating device based on LC resonance, a first switch tube nmos1 and a fourth switch tube nmos4 are a first group of switches, a second switch tube nmos2 and a third switch tube nmos3 are a second group of switches, when the battery pack needs to be heated, a control circuit board generates a pulse width modulation wave to control the on-off of the first switch tube nmos1, the second switch tube nmos2, the third switch tube nmos3 and the fourth switch tube nmos4, so that the battery pack carries out pulse discharge, the internal resistance of the battery pack generates heat, the control circuit board controls the first group of switches and the second group of switches to be switched on at 180 degrees in one period, the PTC heater generates heat after being powered on, thereby carrying out constant temperature heating on the outside of the battery pack, thus realizing the simultaneous heating of the inside and the outside of the battery pack, when the temperature in a metal shell exceeds a set high temperature threshold value, the control circuit board controls the first group of switches and the second group of switches to be switched off, the heating was stopped.
Description
Technical Field
The utility model relates to a battery heating field especially relates to a low temperature battery pack heating device based on LC resonance.
Background
With the continuous popularization of new energy automobiles, the performance of the new energy automobiles is improved along with the change of the use environment, particularly in winter, the temperature is sharply reduced, many regions are extremely cold, and the requirements on the new energy automobiles are additionally high.
As for new energy vehicles using storage batteries as power sources, low temperature has a great influence on the charge and discharge performance, the service life and the capacity degradation of the batteries. Therefore, the thermal management method of the new energy automobile battery in the low-temperature environment becomes a necessary measure for prolonging the service life of the battery and improving the low-temperature service performance of the automobile, and the battery is at the proper working temperature, which becomes a research focus in a thermal management system, so that the power battery needs to be heated.
The air conditioner and the power battery heating system of the city-increasing electric automobile on the current market are complex in structure and high in energy consumption, and the cruising ability of the automobile is reduced to a great extent.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a low temperature battery pack heating apparatus based on LC resonance, which generates a pulse width modulation driving signal with a period equal to a duty ratio and an opposite amplitude through a control circuit boardDriving a full bridge switch at a switching frequency of
Make battery pack carry out pulse discharge, the inside internal heating of realizing at the discharge in-process of battery pack of new energy automobile, thereby utilize the PTC heater to rise at pulse discharge in-process temperature and heat the battery pack outside, thereby realize the inside and outside concurrent heating of battery pack, when the high temperature, PTC heater resistance increases, reduce discharge current, temperature sensor detects battery pack's surface temperature simultaneously, when the temperature reachs the settlement threshold value, stop discharging, open the radiator when the high temperature and dispel the heat, prevent that battery pack from heating excessively and causing the damage. This application can heat the battery in the short time, reduces switching loss, has improved the heating efficiency of battery, and simple structure, can solve among the prior art power battery heating system energy consumption height, the complicated scheduling problem of structure.
In order to achieve the above object, the present invention provides a low temperature battery assembly heating device based on LC resonance, which is realized as follows:
the utility model provides a low temperature battery pack heating device based on LC resonance, including metal casing, battery pack, the rubber pad, the PTC heater, heating circuit board, control circuit board, with battery pack, the rubber pad, the PTC heater is installed in metal casing, and keep apart through the rubber pad between PTC heater and the battery pack, heating circuit board and control circuit board install at the metal casing upper surface, battery pack and PTC heater, heating circuit board, control circuit board electric connection, control circuit board is used for the output of control heating circuit board, and then generate heat by heating circuit board control PTC heater, the heat transmission on the PTC heater is for the rubber pad, the rubber pad transmits to battery pack, and then for the battery pack heating.
The utility model discloses a rubber pad adopts antistatic, high temperature resistance rubber pad, prevents that the static that the in-process of PTC heater heating produced from influencing battery pack and normally working.
The utility model discloses an all install the same radiator on four lateral walls of metal casing, temperature sensor, and install liquid crystal display on the glove compartment of auttombilism room, wherein temperature sensor is arranged in detecting the temperature in the metal casing, this temperature is battery pack's surface temperature promptly, the radiator is used for the inside cooling of metal casing, the information transmission that temperature sensor gathered gives control circuit board, calculate current temperature value in the metal casing in control circuit board, control circuit board control liquid crystal display shows the inside temperature value of metal casing, when the temperature value surpasss the default, control circuit board control radiator work, thereby for the inside cooling of metal casing, make battery pack work under suitable temperature environment.
The utility model discloses a liquid crystal display adopts touch liquid crystal display, can be on liquid crystal display manual input battery pack's low temperature threshold value and high temperature threshold value, and the temperature threshold value that will set for transmits to control circuit board, when temperature sensor detects that the inside temperature of metal casing surpasss the high temperature threshold value, control PTC heater stop heating, and control radiator work is the inside cooling of metal casing, when temperature sensor detects that the inside temperature of metal casing is less than the low temperature threshold value, control circuit board control radiator stop working, and control PTC heater heating, make the inside constancy of temperature of metal casing in the default range, provide suitable temperature operational environment for battery pack.
The utility model discloses a control circuit board produces the pulse width modulation drive signal that the cycle and duty cycle equal amplitude are opposite and sends for heating circuit board, is equipped with the full-bridge switch on the heating circuit board, and the switching frequency through controlling the full-bridge switch is
Control battery pack and carry out pulse discharge, inside the realization of discharging of new energy automobile's battery pack is inside at the in-process inside heating, thereby PTC heater heats the battery pack outside at pulse discharge in-process temperature rise, thereby realize that battery pack is inside heats with the outside simultaneously, detect battery pack's surface temperature by temperature sensor, when the temperature reachs and sets for the threshold value, control circuit board control heating circuit board work controls battery pack and stops to control battery packAnd stopping discharging, wherein when the temperature is too high, the control circuit board controls the radiator to be opened to radiate the battery assembly, so that the battery assembly is prevented from being damaged due to excessive heating.
The utility model discloses a control circuit board adopts STM32F103ZET6 minimum system board.
The heating circuit board of the utility model comprises a first switch tube nmos1, a second switch tube nmos2, a third switch tube nmos3, a fourth switch tube nmos4, an inductor L and a capacitor C, the drain d of the first switch tube nmos1 is connected with the drain d of the third switch tube nmos3 and then connected with the anode of the battery pack, the source s of the first switch tube nmos1 is connected with the drain d of the second switch tube nmos2 and then connected with one end of an inductor L, a capacitor C is connected between the other end of the inductor L and the PTC heater, the source s of the third switch tube nmos3 is connected with the drain d of the fourth switch tube nmos4 and then connected with the PTC heater, the source s of the second switch tube nmos2 is connected with the source s of the fourth switch tube nmos4 and then connected with the cathode of the battery pack, the gate g of the first switch tube nmos1 is connected with the gate g of the fourth switch tube nmos4 and then connected with the PA3 pin of the control circuit board, and the gate g of the second switch tube nmos2 is connected with the gate g of the third switch tube nmos3 and then connected with the PA4 pin of the control circuit board.
The utility model discloses an inductance L and electric capacity C have constituteed LC resonance circuit, LC resonance circuit's frequency does
The control circuit board generates pulse width modulation waves to control the on-off frequency of the first switching tube nmos1, the second switching tube nmos2, the third switching tube nmos3 and the fourth switching tube nmos4 to be
The utility model discloses a first switch tube nmos1 and fourth switch tube nmos4 are first group's switch, second switch tube nmos2 and third switch tube nmos3 are second group's switch, when needing to heat for battery pack, produce pulse width modulation wave by control circuit board and control first switch tube nmos1, second switch tube nmos2, third switch tube nmos3, switching on and shutting off of fourth switch tube nmos4, make battery pack carry out pulse discharge, battery pack internal resistance heat generation, control circuit board controls first group's switch and second group's switch 180 degrees difference and switches on in a cycle, the PTC heater heat behind the circular telegram, thereby heat the constant temperature to the battery pack outside, the while heating inside and outside the battery pack has been realized like this, when the temperature in the metal casing exceedes the high temperature threshold of settlement, control circuit board controls first group's switch and second group's switch and shuts off, stop heating.
Because the utility model discloses a control circuit board output pulse width modulation drive signal control heating circuit board heats PTC, and then for the structure of battery pack heating to can obtain following beneficial effect:
the utility model discloses a control circuit board produces the pulse width modulation drive signal drive full-bridge switch that the cycle is equal amplitude opposite with duty cycle, and switching frequency is
Make battery pack carry out pulse discharge, the inside internal heating of realizing at the discharge in-process of battery pack of new energy automobile, thereby utilize the PTC heater to rise at pulse discharge in-process temperature and heat the battery pack outside, thereby realize the inside and outside concurrent heating of battery pack, when the high temperature, PTC heater resistance increases, reduce discharge current, temperature sensor detects battery pack's surface temperature simultaneously, when the temperature reachs the settlement threshold value, stop discharging, open the radiator when the high temperature and dispel the heat, prevent that battery pack from heating excessively and causing the damage. The battery pack can be heated in a short time, the switching loss is reduced, the heating efficiency of the battery is improved, the structure is simple, and the problems that a power battery heating system in the prior art is high in energy consumption, complex in structure and the like can be solved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a low-temperature battery pack heating device based on LC resonance according to the present invention;
fig. 2 is a schematic view of an installation structure of a radiator and a temperature sensor of a low-temperature battery pack heating device based on LC resonance according to the present invention;
fig. 3 is a working schematic diagram of a low-temperature battery pack heating device based on LC resonance according to the present invention;
fig. 4 is a schematic circuit diagram of a heating circuit board of a low-temperature battery pack heating device based on LC resonance.
The main elements are indicated by symbols.
| Metal shell | 1 | |
2 |
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3 | |
4 |
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5 | |
6 |
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7 | |
8 |
| Liquid crystal display screen | 9 |
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 to 4 show a low-temperature battery pack heating device based on LC resonance according to the present invention, which includes a metal casing 1, a battery pack 2, a rubber pad 3, a PTC heater 4, a heating circuit board 5, and a control circuit board 6.
As shown in fig. 1, install battery pack 2, rubber pad 3, PTC heater 4 in metal casing 1, and keep apart through rubber pad 3 between PTC heater 4 and the battery pack 2, prevent that PTC heater 4 from directly damaging battery pack 2 with battery pack 2 contact, heating circuit board 5 and control circuit board 6 install at metal casing 1 upper surface, battery pack 2 and PTC heater 4, heating circuit board 5, control circuit board 6 electric connection, control circuit board 6 is used for controlling the output of heating circuit board 5, and then control PTC heater 4 by heating circuit board 5 and generate heat, rubber pad 3 is transmitted to heat pad 3 to the heat transfer on PTC heater 4, rubber pad 3 transmits to battery pack 2, and then heats for battery pack 2.
The rubber pad 3 adopts the anti-static and high temperature resistant rubber pad 3, and prevents static electricity generated in the heating process of the PTC heater 4 from influencing the normal work of the battery pack 2.
As shown in fig. 2, the same heat sink 7 and the same temperature sensor 8 are mounted on the four side walls of the metal housing 1, and a liquid crystal display 9 is mounted on a glove compartment of an automobile cab, wherein the temperature sensor 8 is used for detecting the temperature in the metal housing 1, which is the surface temperature of the battery assembly 2, the heat sink 7 is used for cooling the inside of the metal housing 1, information collected by the temperature sensor 8 is transmitted to the control circuit board 6, the current temperature value in the metal housing 1 is calculated in the control circuit board 6, the control circuit board 6 controls the liquid crystal display 9 to display the temperature value in the metal housing 1, and when the temperature value exceeds a preset value, the control circuit board 6 controls the heat sink 7 to work, so as to cool the inside of the metal housing 1, and enable the battery assembly 2 to work in a proper temperature environment.
Liquid crystal display 9 adopt touch liquid crystal display 9, can be on liquid crystal display 9 manual input battery pack 2's low temperature threshold value and high temperature threshold value, and transmit the temperature threshold value of setting for to control circuit board 6, when temperature sensor 8 detects that metal casing 1 inside temperature surpasss the high temperature threshold value, control PTC heater 4 stops heating, and control radiator 7 work is the inside cooling of metal casing 1, when temperature sensor 8 detects that metal casing 1 inside temperature is less than the low temperature threshold value, control circuit board 6 control radiator 7 stops working, and control PTC heater 4 heats, make metal casing 1 inside temperature invariant in the default range, provide suitable temperature operational environment for battery pack 2.
The control circuit board 6 generates pulse width modulation driving signals with equal period and equal duty ratio and opposite amplitudes and sends the pulse width modulation driving signals to the heating circuit board 5, the heating circuit board 5 is provided with a full-bridge switch, and the switching frequency of the full-bridge switch is controlled to be
Control battery pack 2 and carry out pulse discharge, inside the realization internal heating of discharging in-process of battery pack 2 of new energy automobile, thereby PTC heater 4 heats battery pack 2 outside at pulse discharge in-process temperature rise, thereby realize that battery pack 2 is inside heats with the outside simultaneously, detect battery pack 2's surface temperature by temperature sensor 8, when the temperature reaches the settlement threshold value, control circuit board 6 control heating circuit board 5 work controls battery pack 2 and stops discharging, when the high temperature, control circuit board 6 control radiator 7 is opened and is dispelled the heat for battery pack 2, prevent that battery pack 2 from heating excessively and causing the damage. The battery heating system has the advantages that the battery can be heated in a short time, the switching loss is reduced, the heating efficiency of the battery is improved, the structure is simple, and the problems that the power battery heating system in the prior art is high in energy consumption, complex in structure and the like can be solved.
The control circuit board 6 adopts an STM32F103ZET6 minimum system board, and both a PA3 pin and a PA4 pin of the STM32F103ZET6 minimum system board can generate pulse width modulation wave signals.
As shown in fig. 4, the heating circuit board 5 includes a first switching tube nmos1, a second switching tube nmos2, and a third switching tube nmos3, the fourth switching tube nmos4, an inductor L and a capacitor C are connected, a drain d of the first switching tube nmos1 and a drain d of the third switching tube nmos3 are connected and then connected with a positive electrode of the battery assembly 2, a source s of the first switching tube nmos1 and a drain d of the second switching tube nmos2 are connected and then connected with one end of the inductor L, the capacitor C is connected between the other end of the inductor L and the PTC heater 4, a source s of the third switching tube nmos3 and a drain d of the fourth switching tube nmos4 are connected and then connected with the PTC heater 4, a source s of the second switching tube nmos2 and a source s of the fourth switching tube nmos4 are connected and then connected with a negative electrode of the battery assembly 2, a gate g of the first switching tube nmos1 and a gate g of the fourth switching tube nmos4 are connected and then connected with a PA3 pin of the control circuit board 6, and a gate g of the second switching tube nmos2 and a gate g 3 are connected with a gate pin of the PA4 of the control circuit board.
As shown in fig. 4, the inductor L and the capacitor C form an LC resonant circuit with a frequency of
The control circuit board 6 generates pulse width modulation waves to control the on-off frequency of the first switching tube nmos1, the second switching tube nmos2, the third switching tube nmos3 and the fourth switching tube nmos4 to be equal to
Namely, the on-off frequency of the first switching tube nmos1, the second switching tube nmos2, the third switching tube nmos3 and the fourth switching tube nmos4 is the same as the frequency of the LC resonance circuit.
As shown in fig. 4, the first switch tube nmos1 and the fourth switch tube nmos4 are a first group of switches, the second switch tube nmos2 and the third switch tube nmos3 are a second group of switches, when it is necessary to heat the battery assembly 2, the control circuit board 6 generates a pulse width modulation wave to control the on and off of the first switch tube nmos1, the second switch tube nmos2, the third switch tube nmos3 and the fourth switch tube nmos4, so that the battery assembly 2 performs pulse discharge, the internal resistance of the battery assembly 2 generates heat, the control circuit board 6 controls the first group of switches and the second group of switches to be turned on at a difference of 180 degrees in one cycle, the PTC heater 4 generates heat after being turned on, so as to perform constant temperature heating on the outside of the battery assembly 2, thereby realizing simultaneous heating of the inside and the outside of the battery assembly 2, and when the temperature in the metal housing 1 exceeds a set high temperature threshold, the control circuit board 6 controls the first group of switches and the second group of switches to be turned off, the heating was stopped. The low-temperature rapid heating of the battery assembly 2 is realized, and the LC resonance reduces the switching loss.
The utility model discloses a theory of operation and working process as follows:
as shown in FIG. 3, the control circuit board 6 generates a PWM driving signal with a period equal to the duty ratio and an opposite amplitude, and sends the PWM driving signal to the heating circuit board 5. the heating circuit board 5 is provided with a full-bridge switch, and the switching frequency of the full-bridge switch is controlled to be
To control battery pack 2 to carry out pulse discharge, the inside of battery pack 2 of the new energy automobile realizes the internal heating in the discharging process, and PTC heater 4 rises in the temperature in the pulse discharging process to heat the outside of battery pack 2, thereby realizing the simultaneous heating of the inside and the outside of battery pack 2, detect the temperature in metal shell 1 by temperature sensor 8, the temperature is the surface temperature of battery pack 2, temperature sensor 8 transmits the collected temperature information to control circuit board 6, calculate the current temperature value in metal shell 1 in control circuit board 6, control circuit board 6 controls liquid crystal display 9 to display the temperature value in metal shell 1, when the temperature value exceeds the preset value, control circuit board 6 controls radiator 7 to work, thereby reducing the temperature in metal shell 1, the user can manually input the low temperature threshold value and the high temperature threshold value of battery pack 2 on liquid crystal display 9, and transmitting the set temperature threshold value to the control circuit board 6, controlling the PTC heater 4 to stop heating and controlling the radiator 7 to work to cool the inside of the metal shell 1 when the temperature sensor 8 detects that the temperature inside the metal shell 1 exceeds the high temperature threshold value, and controlling the radiator 7 to stop working and controlling the radiator 6 to stop working when the temperature sensor 8 detects that the temperature inside the metal shell 1 is lower than the low temperature threshold valueThe PTC heater 4 is controlled to heat, so that the temperature inside the metal shell 1 is constant within a preset value range, and a proper temperature working environment is provided for the battery assembly 2.
Claims (3)
1. A low temperature battery pack heating device based on LC resonance is characterized in that: including metal casing, battery pack, the rubber pad, the PTC heater, heating circuit board, control circuit board, with battery pack, the rubber pad, the PTC heater is installed in metal casing, and keep apart through the rubber pad between PTC heater and the battery pack, heating circuit board and control circuit board install at the metal casing upper surface, battery pack and PTC heater, heating circuit board, control circuit board electric connection, control circuit board is used for the output of control heating circuit board, and then generate heat by heating circuit board control PTC heater, the last heat transmission of PTC heater is for the rubber pad, the rubber pad is transmitted to battery pack, and then for the battery pack heating.
2. The LC resonance-based low-temperature battery pack heating apparatus according to claim 1, wherein: the same radiators and temperature sensors are mounted on the four side walls of the metal shell, and the liquid crystal display screen is mounted on the glove box of the automobile cab.
3. The LC resonance-based low-temperature battery pack heating apparatus according to claim 1, wherein: the heating circuit board comprises a first switching tube nmos1, a second switching tube nmos2, a third switching tube nmos3, a fourth switching tube nmos4, an inductor L and a capacitor C, the drain d of the first switch tube nmos1 is connected with the drain d of the third switch tube nmos3 and then connected with the anode of the battery pack, the source s of the first switch tube nmos1 is connected with the drain d of the second switch tube nmos2 and then connected with one end of an inductor L, a capacitor C is connected between the other end of the inductor L and the PTC heater, the source s of the third switch tube nmos3 is connected with the drain d of the fourth switch tube nmos4 and then connected with the PTC heater, the source s of the second switch tube nmos2 is connected with the source s of the fourth switch tube nmos4 and then connected with the cathode of the battery pack, the gate g of the first switch tube nmos1 is connected with the gate g of the fourth switch tube nmos4 and then connected with the PA3 pin of the control circuit board, and the gate g of the second switch tube nmos2 is connected with the gate g of the third switch tube nmos3 and then connected with the PA4 pin of the control circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120052441.1U CN213816258U (en) | 2021-01-11 | 2021-01-11 | Low temperature battery pack heating device based on LC resonance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120052441.1U CN213816258U (en) | 2021-01-11 | 2021-01-11 | Low temperature battery pack heating device based on LC resonance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736327A (en) * | 2021-01-11 | 2021-04-30 | 河北工业大学 | Low temperature battery pack heating device based on LC resonance |
| CN113782873A (en) * | 2021-11-15 | 2021-12-10 | 蜂巢能源科技有限公司 | Heating circuit of battery pack and heating method for heating circuit |
| CN114156570A (en) * | 2021-11-30 | 2022-03-08 | 北京理工大学 | Power battery composite heating system based on bidirectional LC resonance |
-
2021
- 2021-01-11 CN CN202120052441.1U patent/CN213816258U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736327A (en) * | 2021-01-11 | 2021-04-30 | 河北工业大学 | Low temperature battery pack heating device based on LC resonance |
| CN113782873A (en) * | 2021-11-15 | 2021-12-10 | 蜂巢能源科技有限公司 | Heating circuit of battery pack and heating method for heating circuit |
| WO2023082475A1 (en) * | 2021-11-15 | 2023-05-19 | 蜂巢能源科技股份有限公司 | Heating circuit of battery assembly and heating method for heating circuit |
| CN114156570A (en) * | 2021-11-30 | 2022-03-08 | 北京理工大学 | Power battery composite heating system based on bidirectional LC resonance |
| CN114156570B (en) * | 2021-11-30 | 2024-01-26 | 北京理工大学 | Power battery composite heating system based on bidirectional LC resonance |
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