CN214898596U - Battery thermal management system with zone heating function - Google Patents
Battery thermal management system with zone heating function Download PDFInfo
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- CN214898596U CN214898596U CN202120638852.9U CN202120638852U CN214898596U CN 214898596 U CN214898596 U CN 214898596U CN 202120638852 U CN202120638852 U CN 202120638852U CN 214898596 U CN214898596 U CN 214898596U
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- heating
- battery
- heating device
- management system
- thermal management
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 149
- 239000010410 layer Substances 0.000 claims description 25
- 229920000742 Cotton Polymers 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 21
- 239000004642 Polyimide Substances 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 239000000499 gel Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims 2
- 230000006870 function Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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Abstract
The utility model discloses a battery thermal management system with subregion heating function, include: a plurality of cells; a plurality of heating devices disposed between two adjacent cells and in contact with one of the cells; and the control module comprises a plurality of heating units corresponding to the electric cores, each heating unit comprises a heating device and a heating switch connected with the heating device in series, and the heating switches are used for controlling the on-off of the heating loops corresponding to the electric cores. The utility model discloses set up heating device between two adjacent electric cores, shortened the heat conduction distance of heating device and electric core, can make electric core reach target temperature sooner.
Description
Technical Field
The utility model relates to a battery heating technology field, concretely relates to battery thermal management system with subregion heating function.
Background
With the increasing environmental pollution and energy crisis, electric vehicles are becoming the focus of attention of the automotive industry. The performance of the battery serving as a core part of the electric automobile plays a crucial role in the performance of the whole automobile. Due to the electrochemical characteristics of the battery, the performance of the battery at both high and low temperatures is somewhat degraded, and therefore, efficient thermal management techniques are required to stably operate the battery at a suitable temperature.
At present, the heat management of the battery mainly adopts circulating water heating, namely a water channel is arranged at the bottom and the upper part of the battery pack or among the batteries, circulating liquid is introduced, the battery pack is opened when the temperature of the battery is lower than T1 and is closed when the temperature of the battery is higher than T2, and the liquid in the water channel exchanges heat with the batteries, so that the purpose of heating the batteries is achieved.
In addition, the battery is heated by adopting an electric heating film, the electric heating film is attached to the bottom of the battery pack, the electric heating film is similar to a resistance element, electric energy is converted into heat energy after the electric heating film is electrified, the battery is heated, and when the temperature of the battery is higher than T2, the power supply is stopped.
The battery heating speed of the heat management mode is generally 0.5-1 ℃/min, the battery heating speed is low, and the battery cannot reach an ideal temperature in a short time due to the low heating speed, so that the charging and discharging performance of the battery is influenced, and the state of the whole vehicle at low temperature is further influenced. In addition, the current thermal management mode manages the battery pack as a whole, the battery pack consists of a plurality of battery cells, and the performance of the battery pack is easily affected by the performance of the battery cell in the worst state to form a short plate effect, so that the temperature difference of the battery cells in the battery pack is too large, and can reach the temperature difference of more than 15 ℃ under extreme conditions. Long term exposure to such temperature differentials can have irreversible effects on the overall performance and life of the battery pack.
Disclosure of Invention
In view of this, the utility model provides a battery thermal management system with subregion heating function, its advantage lies in can independently controlling every electric core of heating, has shortened the heat conduction distance between heating device and the electric core, and faster messenger's electric core reaches the target temperature to reach the effect that reduces the difference in temperature, guaranteed whole energy memory's temperature uniformity.
The utility model provides a battery thermal management system with subregion heating function, include: a plurality of cells; a plurality of heating devices disposed between two adjacent cells and in contact with one of the cells; and the control module comprises a plurality of heating units corresponding to the electric cores, each heating unit comprises a heating device and a heating switch connected with the heating device in series, and the heating switches are used for controlling the on-off of the heating loops corresponding to the electric cores.
Further, the control module further comprises a main control unit connected with the plurality of heating units in series, and the main control unit comprises a main control switch connected with the battery core in series.
Further, the main control unit further comprises an IGBT element capable of controlling on-off at high frequency to control the heating power and speed of the battery core.
Further, the plurality of heating units are connected in series, and the heating units further comprise a parallel switch which is connected in parallel with the heating device and the heating switch.
Furthermore, one end of each heating device is connected with the anode of the battery cell through a circuit, and the other end of each heating device is electrically connected with the cathode of the battery cell through a circuit.
Further, the battery pack further comprises thermal insulation cotton, and the thermal insulation cotton is located between the heating device and the other battery cell.
Further, the heating device is in a shape of a diaphragm, the size of the heating device is equal to or smaller than that of the battery core, the heat insulation cotton is also in a shape of a diaphragm, and the size of the heat insulation cotton is equal to or larger than that of the heating device.
Further, the heating device comprises a first polyimide layer, a heating element layer, a second polyimide layer and a double-faced adhesive tape layer in sequence from the heat insulation cotton to the battery core.
Further, the main body part of the thermal insulation cotton is a gas gel layer, and the periphery of the thermal insulation cotton is a silica gel layer.
Furthermore, a temperature sensor for detecting the temperature of the heating device is arranged on the heating device.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides a pair of battery thermal management system with subregion heating function places heating device between two adjacent electric cores, it is cotton to have set up at a distance from the temperature between heating device and another monomer electricity core with adding, separate temperature and protection to another electricity core, set up independent control module to every electricity core and heating device in addition, when the system detects that certain electricity core in the battery package is less than the target temperature, can this electricity core of independent control heating, thereby reach the effect that reduces the difference in temperature, strengthen the uniformity of electric core in the battery package.
Drawings
Fig. 1 is the schematic diagram of the minimum control unit structure (the battery cell is a soft-package battery cell) in the utility model.
Fig. 2 is a schematic structural diagram of the middle heating device (the electric core is a square-shell electric core) of the present invention.
Fig. 3 is a schematic view of the unfolded structure of fig. 2 (the right heating device omits the second tab).
Fig. 4 is a schematic structural view of the middle heat insulation cotton of the present invention.
Fig. 5 is a schematic diagram of the control module according to the present invention.
Fig. 6 is a flowchart illustrating the operation of the battery thermal management system of the present invention.
Wherein: 10-electric core; 20,20a,20 b-heating means; 30-heat insulation cotton; 40-a control module; 11-a first tab; 21-a second tab; 211-a connecting portion; 22-a temperature sensor; 31-a gas gel layer; 32-a silica gel layer; 41-a main control unit; 411-IGBT element; 412-master control switch; 42-a heating unit; 421,421a,421 b-heating switch; 422,422a,422 b-parallel switch.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated in the present description are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the present invention provides a battery thermal management system with a partitioned heating function, which includes a plurality of battery cells 10, a plurality of heating devices 20, a plurality of thermal insulation cotton 30, and a control module 40 (see fig. 5).
The plurality of battery cells 10 are connected in series or in parallel or in a combination of series and parallel, and the battery cells 10 are provided with two first tabs 11. In the present invention, the battery cell 10 may be a soft-packaged battery cell, or a square-shell battery cell, and when the battery cell 10 is a soft-packaged battery cell, the first tabs 11 are disposed on two opposite sides of the soft-packaged battery cell, as shown in fig. 1; when the battery cell 10 is a square-shell battery cell, the first tab 11 is disposed on the same side of the square-shell battery cell, as shown in fig. 2.
Referring to fig. 3, the heating device 20 is disposed between two adjacent battery cells 10 and is in contact with one of the battery cells 10, and can absorb or dissipate heat, in this embodiment, the heating device 20 is a heating device 20a and a heating device 20b. A temperature sensor 22 is also provided on the heating device 20 for monitoring its temperature.
Referring to fig. 4, the thermal insulation cotton 30 is disposed between the heating device 20 and another battery cell 10, and plays a role in insulating and protecting the battery cell 10, so that only one battery cell 10 is heated when the heating device 20 heats, and the other battery cell 10 is not affected by the heating device 20. The main body part of the thermal insulation cotton 30 is a gas gel layer 31, and because the gas gel is soft, a silica gel layer 32 is arranged on the periphery of the gas gel layer, so that the fixation is facilitated. In this example, the gas gel layer 31 had a thickness of 2mm, a thermal conductivity of 0.02 w/m.k at 25 ℃ and was hydrophobic as a whole.
It should be noted that the heating device 20 includes a plurality of layers of diaphragms, the diaphragms sequentially include a first polyimide layer, a heat-generating body layer, a second polyimide layer, and a double-sided adhesive layer in a direction from the thermal insulation cotton 30 to the electric core 10, the double-sided adhesive layer is attached to the electric core 10, a specific thickness of each layer is adjusted according to a difference of the electric core, in the square-shell electric core shown in fig. 4, a total thickness of the heating device 20 is 0.35 ± 0.05mm, wherein the first polyimide layer is 0.08mm, the heat-generating body layer is 0.05mm, the second polyimide layer is 0.08mm, and the double-sided adhesive layer is 0.14 mm. In addition, the thermal insulation cotton 30 is also in a sheet shape, and the size of the thermal insulation cotton is equal to or slightly larger than that of the heating device 20, and the size of the heating device 20 is equal to or slightly smaller than that of the battery core 10. In the square-shell battery cell of the present embodiment, when the battery cell 10 is heated, since the thickness of the battery cell is larger than that of the soft-package battery cell, the heat exchange is slow, the heating device 20 needs to wrap the large surfaces (the front and rear sides in fig. 2) on both sides to heat, and the maximum power density is 0.415W/CM2。
Further, as shown in fig. 5, the control module 40 includes a plurality of heating units 42 corresponding to each battery cell 10, where each heating unit 42 includes the heating device 20 and a heating switch 421 connected in series with the heating device 20, the heating switches 421 of the present embodiment are a heating switch 421a and a heating switch 421b. Each heating loop has a conducting state and a disconnecting state, and when the heating loop is in the conducting state, the corresponding heating device 20 is powered by the battery cell 10 to generate heat for working; when the heating circuit is in the off state, the corresponding heating device 20 is de-energized and is in a natural state.
Further, the control module 40 further includes a main control unit 41 connected in series with the plurality of heating units 42. The main control unit 41 includes a main control switch 412 connected in series with the battery cell 10, and the main control switch 412 of this embodiment is a main control relay and is in a normally open state. The main control unit 41 further includes an IGBT element 411 capable of controlling on/off at a high frequency to control the heating power and speed of the electric core cells. The plurality of heating units 42 are connected in series, the heating units 42 further include a parallel switch 422, the parallel switch 422 is a parallel switch 422a, a parallel switch 422b, and a parallel switch 422n, the parallel switch 422 in this embodiment is a parallel control relay, the parallel control relays are connected in parallel with the corresponding heating device and the heating relay, and the parallel control relays are in a normally closed state. One end of the heating device 20 is connected to the positive electrode of the battery cell 10 through a line, and the other end of the heating device 20 is electrically connected to the negative electrode of the battery cell 10 through a line.
In the present invention, when the temperature of the electric core corresponding to the heating device 20a or the heating device 20b is lower than the target temperature, the heating is turned on, at this time, the main control switch 412 is turned on, the heating switch 421a or 421b corresponding to the electric core with the temperature lower than the target temperature is turned on, and the bypass switch 422a or 422b is turned off, that is, if the temperature of the electric core corresponding to the heating device 20a is lower than the target temperature, the heating switch 421a is turned on, and the bypass switch 422a is turned off; similarly, if the cell temperature corresponding to the heating device 20b is lower than the target temperature, the heating relay heating switch 421b is closed, and the bypass switch 422b is opened.
The utility model also provides a control method for this energy memory thermal management system, please refer to fig. 6, judge whether there is monomer electricity core 10 to be lower than the target temperature at the beginning, if not, then directly disconnect main relay 412; if so, the corresponding heating switch 421 is closed, the corresponding parallel switch 422 is opened, then it is determined whether the temperatures of the remaining battery cells 10 are lower than the target temperature one by one, if not, the main control switch 412 is closed, heating is started, if so, the heating switch 421 of the corresponding battery cell 10 is closed, the corresponding parallel switch 422 is opened, until the determination of all the battery cells 10 is completed, the temperatures of all the battery cells reach the target temperature, and heating is finished. The utility model discloses in, IGBT component 411 through the quantity of the electric core 10 of judgement needs heating and with the difference in temperature of target temperature, the dynamic adjustment duty cycle makes heating device 20 can stabilize rapid heating, avoids appearing thermal runaway.
Can know through the statement above, the utility model provides a battery thermal management system with subregion heating function places heating device between two adjacent electric cores, still add between heating device and another monomer electric core and established at a distance from the temperature cotton, separate temperature and protection to another electric core, still set up independent control module to every electric core and heating device in addition, when certain electric core that the system detected in the battery package is less than the target temperature, can independently control and heat this electric core to reach the effect that reduces the difference in temperature, strengthen the uniformity of electric core in the battery package, the utility model discloses the method of setting forth can also shorten the heat conduction distance between heating device and the electric core, promotes rate of heating, reduces the heat loss at the heat transfer in-process.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A battery thermal management system with zoned heating, comprising:
a plurality of cells (10);
a plurality of heating devices (20) which are arranged between two adjacent cells (10) and are in contact with one of the cells (10);
the control module (40) comprises a plurality of heating units (42) corresponding to the battery cells (10), each heating unit (42) comprises a heating device (20) and a heating switch (421) connected with the heating device (20) in series, and the heating switches (421) are used for controlling the on-off of heating loops corresponding to the battery cells.
2. The battery thermal management system with zone heating function of claim 1, wherein the control module (40) further comprises a master control unit (41) in series with the plurality of heating units (42), the master control unit (41) comprising a master switch (412) in series with the battery cell (10).
3. The battery thermal management system with the zone heating function according to claim 2, wherein the main control unit (41) further comprises an IGBT element (411) capable of being switched on and off at a high frequency to control the heating power and the heating speed of the battery cell (10).
4. The battery thermal management system with zone heating function according to claim 1, wherein the plurality of heating units (42) are connected in series, the heating units (42) further comprising a parallel switch (422), the parallel switch (422) being connected in parallel with the heating device (20) and the heating switch (421).
5. The battery thermal management system with the zone heating function according to claim 1, wherein one end of each heating device (20) is connected with the positive electrode of the battery cell (10) through a circuit, and the other end of each heating device (20) is electrically connected with the negative electrode of the battery cell (10) through a circuit.
6. The battery thermal management system with the zone heating function according to claim 1, further comprising a thermal insulation cotton (30), wherein the thermal insulation cotton (30) is located between the heating device (20) and another battery cell (10).
7. The battery thermal management system with the zone heating function of claim 6, wherein the heating device (20) is in a shape of a membrane and has a size equal to or smaller than that of the battery cell (10), and the thermal insulation cotton (30) is also in a shape of a membrane and has a size equal to or larger than that of the heating device (20).
8. The battery thermal management system with the zone heating function of claim 6, wherein the heating device (20) comprises a first polyimide layer, a heat-generating body layer, a second polyimide layer and a double-sided adhesive layer in sequence from the thermal insulation cotton (30) to the battery core (10).
9. The battery thermal management system with the zone heating function according to claim 6, wherein the main body part of the thermal insulation cotton (30) is a gas gel layer (31), and the periphery of the thermal insulation cotton is a silica gel layer (32).
10. The battery thermal management system with zone heating function according to claim 1, characterized in that a temperature sensor (22) for detecting the temperature of the heating device (20) is further arranged on the heating device (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638852.9U CN214898596U (en) | 2021-03-29 | 2021-03-29 | Battery thermal management system with zone heating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638852.9U CN214898596U (en) | 2021-03-29 | 2021-03-29 | Battery thermal management system with zone heating function |
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| Publication Number | Publication Date |
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| CN214898596U true CN214898596U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120638852.9U Active CN214898596U (en) | 2021-03-29 | 2021-03-29 | Battery thermal management system with zone heating function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114388910A (en) * | 2022-03-24 | 2022-04-22 | 北京理工大学 | Independent double-loop power battery system and partitioned heating method |
-
2021
- 2021-03-29 CN CN202120638852.9U patent/CN214898596U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114388910A (en) * | 2022-03-24 | 2022-04-22 | 北京理工大学 | Independent double-loop power battery system and partitioned heating method |
| CN114388910B (en) * | 2022-03-24 | 2022-05-20 | 北京理工大学 | Independent double-loop power battery system and partitioned heating method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220104 Address after: 511400 No.36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AION New Energy Vehicle Co.,Ltd. Address before: 510030 23 building, Cheng Yue mansion 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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| TR01 | Transfer of patent right |