CN210167483U - Lithium battery temperature management system - Google Patents
Lithium battery temperature management system Download PDFInfo
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- CN210167483U CN210167483U CN201921378252.2U CN201921378252U CN210167483U CN 210167483 U CN210167483 U CN 210167483U CN 201921378252 U CN201921378252 U CN 201921378252U CN 210167483 U CN210167483 U CN 210167483U
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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
Abstract
Lithium battery temperature management system. At present, lithium is separated out due to low-temperature charging of a lithium battery, and the problem of thermal runaway may be finally caused due to overhigh temperature of the working environment of the lithium battery. The utility model discloses the constitution includes: this lithium battery temperature management system is including parallelly connected discharge circuit (8) and charging circuit (9) between charge and discharge plug (7) and group battery electricity core (6) anodal, the positive negative pole of charge and discharge plug between parallelly connected have heating circuit (10) and refrigerating circuit (11), heating circuit include series connection's normally closed temperature detect switch (4) and heating device (5), refrigerating circuit including series connection's DC transformer (13), semiconductor refrigeration piece (14) and refrigeration temperature detect switch (12), charging circuit including series connection's charging diode (2) and normally open temperature detect switch (3). The utility model is used for the temperature management of lithium cell.
Description
The technical field is as follows:
the utility model relates to a lithium cell temperature management system belongs to new forms of energy lithium cell technical field.
Background art:
the working temperature of the conventional lithium battery is-20-60 ℃, but the performance of the lithium battery is reduced after the working temperature is generally lower than 0 ℃, and the discharge capacity is correspondingly reduced, so the working temperature of the lithium battery with complete performance is usually 0-40 ℃. In general, lithium batteries are not sensitive to temperatures in the interval 0-40 ℃, however, as soon as the temperature exceeds this interval, the lifetime and capacity are compromised.
First, the charge and discharge performance of the lithium ion battery at low temperature is described. For discharge at the same rate, the lower the outside temperature, the lower the discharge voltage of the lithium ion battery will be. When the temperature is reduced, the discharge voltage of the battery is also greatly reduced, so that the battery can reach the discharge cut-off voltage more quickly during low-temperature discharge, and the low-temperature discharge capacity is obviously lower than the normal-temperature capacity.
Charging requires more temperature than discharging, and under a low-temperature environment, lithium battery charging has certain risks. As the dynamic characteristics of the graphite cathode are improved and worsened along with the reduction of the temperature, the electrochemical polarization of the cathode is obviously intensified in the charging process, and the precipitated metal lithium is easy to form lithium dendrites to break through a diaphragm and cause short circuit of the anode and the cathode, thereby causing safety accidents.
The upper temperature limit for operation of a lithium battery is 60 c for which the internal heat of the battery generates reaction heat, polarization heat, and joule heat. In summer, the outdoor temperature is close to 40 ℃, meanwhile, the heat generated by the lithium battery is large, and the lithium battery pack is a relatively closed environment, so that the temperature of the working environment of the lithium battery is too high, a 'hot spot' is formed in the battery, and finally, thermal runaway can be generated to cause safety accidents.
By above can derive, the lithium cell receives the temperature to influence very greatly, with power lithium cell application field and the great application environment of temperature influence, need carry out temperature management to the lithium cell, could improve the safety in application of lithium cell, improves the availability factor, extension lithium cell life.
The utility model has the following contents:
the utility model aims at solving present lithium cell low temperature charging and can causing to analyse lithium, lithium cell operational environment high temperature finally probably produces the problem of thermal runaway, provides one kind and can heat and refrigerated lithium cell temperature management system to the lithium cell.
The above purpose is realized by the following technical scheme:
a lithium battery temperature management system comprises a discharge circuit and a charge circuit which are connected in parallel between a charge-discharge plug and the positive electrode of a battery cell of a battery pack, wherein a heating circuit and a refrigerating circuit are connected in parallel between the positive electrode and the negative electrode of the charge-discharge plug;
the heating circuit comprises a normally closed temperature control switch and a heating device which are connected in series;
the refrigerating circuit comprises a direct current transformer, a semiconductor refrigerating sheet and a refrigerating temperature control switch which are connected in series;
the charging circuit comprises a charging diode and a normally-open temperature control switch which are connected in series.
In the lithium battery temperature management system, the discharge circuit is provided with a discharge diode.
In the lithium battery temperature management system, the heating device is a carbon fiber heating wire wound outside the battery cell or a carbon fiber heating film wrapped outside the battery cell.
In the lithium battery temperature management system, the normally open temperature control switch is a kick type 15 ℃ normally open temperature control switch.
In the lithium battery temperature management system, the normally closed temperature control switch is a kick type 20 ℃ normally closed temperature control switch.
In the lithium battery temperature management system, the refrigeration temperature control switch is a kick type 40 ℃ normally open temperature control switch.
Has the advantages that:
1. the utility model discloses low temperature charging protection, electric current can only get into charging circuit when charging, through the diode that charges, through normally opening temperature detect switch, charges, and fruit temperatureThe degree is less than normally open temperature detect switch temperature of beating 15 ℃, then normally open temperature detect switch automatic disconnection can't charge, and the heating system device starts, to the lithium cell heating, when the temperature is higher than normally open temperature detect switch temperature of beating 15 ℃, then normally open temperature detect switch is automatic closed, the switch-on charging circuit charges to the lithium cell. The lithium battery is heated and then charged in a low-temperature environment, the charging safety of the lithium battery is guaranteed, and the capacity is not damaged.The heating device continues heating until the temperature reaches Heating was stopped at 25 ℃.
2. The utility model discloses install self-heating system additional, lithium cell group uses under autumn winter low temperature environment in the north, when lithium cell group inside temperature is less than 20 ℃, normally closed temperature control switch is automatic closed, start heating device utilizes group battery self electric quantity to heat, when the temperature reaches 25 ℃, normally closed temperature control switch automatic disconnection, heating device stop heating guarantees that lithium cell group discharges at an optimum ambient temperature 20-25 degrees to this improves group battery low temperature environment and discharges the electric quantity.
3. The utility model discloses a group battery installs refrigeration heat sink additional, the outside of group battery all is provided with the iron box, paste the iron box medial surface at the group battery and paste semiconductor refrigeration piece, the refrigeration face is internal for the lithium cell cooling, the cooling surface pastes tight group battery metal box, through the heat dissipation of group battery box, according to different lithium cell group voltage selection corresponding DC transformer for the power supply of semiconductor refrigeration piece, through establishing ties 40 ℃ normally open temperature detect switch (being less than 35 ℃ disconnection, be higher than 40 ℃ switch-on) control semiconductor refrigeration piece work, it is too high at ambient temperature to solve the group battery, how to reduce inside temperature problem.
Description of the drawings:
FIG. 1 is a schematic circuit diagram of the present invention;
in the figure: 1. a discharge diode; 2. a charging diode; 3. a normally open temperature control switch; 4. a normally closed temperature control switch; 5. a heating device; 6. a battery cell; 7. a charge-discharge plug; 8. a discharge circuit; 9. a charging circuit; 10. a heating circuit; 11. a refrigeration circuit; 12. a refrigeration temperature control switch; 13. a DC transformer; 14. semiconductor refrigeration piece.
The specific implementation mode is as follows:
example 1:
a lithium battery temperature management system comprises a discharge circuit 8 and a charge circuit 9 which are connected in parallel between a charge-discharge plug 7 and the positive pole of a battery pack electric core 6, wherein a heating circuit 10 and a refrigerating circuit 11 are connected in parallel between the positive pole and the negative pole of the charge-discharge plug;
the heating circuit comprises a normally closed temperature control switch 4 and a heating device 5 which are connected in series;
the refrigerating circuit comprises a direct current transformer 13, a semiconductor refrigerating piece 14 and a refrigerating temperature control switch 12 which are connected in series, wherein the semiconductor refrigerating piece DC12V is connected, and the power is 30-60W according to the size of the battery pack.
The charging circuit comprises a charging diode 2 and a normally-open temperature control switch 3 which are connected in series.
Example 2:
according to embodiment 1 lithium battery temperature management system, discharge circuit on install discharge diode 1, the one-way electrically conductive characteristic of rectifier diode is used, through discharge circuit when the lithium cell group normally discharges, the electric current is through discharge diode, the electric current can only get into charging circuit when charging, through charging diode, through normally opening temperature detect switch, charge, the one-way conductivity of application rectifier diode, under the same mouthful condition of charging and discharging, realize charging, the circuit of discharging is independent, realize installing temperature detect switch and heating system additional on charging circuit, realize charging after heating under the low temperature condition.
Example 3:
according to embodiment 1 or 2, the lithium battery temperature management system, the heating device is a carbon fiber heating wire wound outside the battery pack electric core or a carbon fiber heating film wrapped outside the battery pack electric core, and the heating wire is a silicon rubber carbon fiber heating wire or a flame-retardant Teflon heating wire. The carbon fiber heating film is also called a graphene electrothermal film. They are characterized in that: the working voltage (direct current 3-600V, alternating current 12-380V) has wide application range, uniform heating, adjustable length, low cost, good effect, no damage for years and more durability.
Example 4:
according to the lithium battery temperature management system in the embodiment 1, 2 or 3, the normally open temperature control switch is a kick type 15 ℃ normally open temperature control switch, and is switched off when the temperature is lower than 15 ℃ and is switched on when the temperature is higher than 15 ℃.
Example 5:
according to the lithium battery temperature management system of embodiment 1 or 2 or 3 or 4, the normally closed temperature controlled switch is a kick type 20 ℃ normally closed temperature controlled switch, which is switched on at a temperature lower than 20 ℃ and switched off at a temperature higher than 25 ℃.
Example 6:
according to the lithium battery temperature management system of the embodiment 1, 2, 3, 4 or 5, the refrigeration temperature control switch is a snap-action 40 ℃ normally-open temperature control switch, the refrigeration temperature control switch is switched off when the temperature is lower than 35 ℃ and is switched on when the temperature exceeds 40 ℃, the refrigeration temperature control switch is switched on when the internal temperature of the lithium battery reaches 40 ℃, the semiconductor refrigeration piece starts to work and refrigerate, when the temperature is reduced to the safe temperature of 35 ℃, the refrigeration temperature control switch is switched off, the semiconductor refrigeration piece stops working, and the automatic control of the semiconductor refrigeration piece is realized.
For the group battery installs the heat preservation measure additional, adopt the thick fire-retardant XPS extrusion molding heated board of B1 level of high heat-insulating rate of 2cm (can be according to using region temperature increase and decrease heated board thickness) to assemble into sealed box body, place the group battery in the box body, guarantee lithium cell group internal temperature, can not cross low and rapid cooling because of outside temperature, can play the heat preservation effect.
Claims (6)
1. A lithium battery temperature management system is characterized in that: the lithium battery temperature management system comprises a discharge circuit and a charge circuit which are connected in parallel between a charge-discharge plug and the positive electrode of a battery cell of a battery pack, wherein a heating circuit and a refrigerating circuit are connected in parallel between the positive electrode and the negative electrode of the charge-discharge plug;
the heating circuit comprises a normally closed temperature control switch and a heating device which are connected in series;
the refrigerating circuit comprises a direct current transformer, a semiconductor refrigerating sheet and a refrigerating temperature control switch which are connected in series;
the charging circuit comprises a charging diode and a normally-open temperature control switch which are connected in series.
2. The lithium battery temperature management system of claim 1, wherein: and the discharge circuit is provided with a discharge diode.
3. The lithium battery temperature management system of claim 2, wherein: the heating device is a carbon fiber heating wire wound outside the battery pack electric core or a carbon fiber heating film wrapped outside the battery pack electric core.
4. The lithium battery temperature management system of claim 3, wherein: the normally open temperature control switch is a kick type 15 ℃ normally open temperature control switch.
5. The lithium battery temperature management system of claim 4, wherein: the normally closed temperature control switch is a kick type 20 ℃ normally closed temperature control switch.
6. The lithium battery temperature management system of claim 5, wherein: the refrigeration temperature control switch is a kick type 40 ℃ normally open temperature control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921378252.2U CN210167483U (en) | 2019-08-23 | 2019-08-23 | Lithium battery temperature management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921378252.2U CN210167483U (en) | 2019-08-23 | 2019-08-23 | Lithium battery temperature management system |
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| CN210167483U true CN210167483U (en) | 2020-03-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987385A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | Temperature control system and method for lithium power battery |
| CN111987386A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
| CN113517492A (en) * | 2021-06-29 | 2021-10-19 | 广西汽车集团有限公司 | System for realizing battery equalizing charge |
| CN113611941A (en) * | 2021-06-17 | 2021-11-05 | 赵文英 | Control method for thermal runaway of lithium battery pack, control panel and temperature control equipment |
| CN114390731A (en) * | 2021-12-16 | 2022-04-22 | 北京卓翼智能科技有限公司 | A heating control system for mooring unmanned aerial vehicle |
-
2019
- 2019-08-23 CN CN201921378252.2U patent/CN210167483U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987385A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | Temperature control system and method for lithium power battery |
| CN111987386A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
| CN113611941A (en) * | 2021-06-17 | 2021-11-05 | 赵文英 | Control method for thermal runaway of lithium battery pack, control panel and temperature control equipment |
| CN113517492A (en) * | 2021-06-29 | 2021-10-19 | 广西汽车集团有限公司 | System for realizing battery equalizing charge |
| CN114390731A (en) * | 2021-12-16 | 2022-04-22 | 北京卓翼智能科技有限公司 | A heating control system for mooring unmanned aerial vehicle |
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Effective date of registration: 20210201 Address after: 150001 room 322, 3rd floor, NO.67 Nantong street, Nangang District, Harbin City, Heilongjiang Province Patentee after: Heilongjiang HENGQIANG Zhijin Technology Co.,Ltd. Address before: 163000 Juying international, Saertu District, Daqing City, Heilongjiang Province 0531 Patentee before: Zhang Hanlin |
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| TR01 | Transfer of patent right |