CN117594917B - Temperature controller, battery temperature control assembly and method, and battery system - Google Patents
Temperature controller, battery temperature control assembly and method, and battery system Download PDFInfo
- Publication number
- CN117594917B CN117594917B CN202410070866.3A CN202410070866A CN117594917B CN 117594917 B CN117594917 B CN 117594917B CN 202410070866 A CN202410070866 A CN 202410070866A CN 117594917 B CN117594917 B CN 117594917B
- Authority
- CN
- China
- Prior art keywords
- temperature
- conductive wire
- battery
- ptc
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 136
- 230000001276 controlling effect Effects 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 14
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 13
- 238000009529 body temperature measurement Methods 0.000 description 31
- 238000001514 detection method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering 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
Abstract
The application relates to a temperature control device, a battery temperature control assembly and method and a battery system. The temperature control device comprises a conductive wire set, a temperature sensor and a PTC heater. The conductive wire group is paved in the temperature measuring area, and the plurality of temperature sensing thermistors and the plurality of PTC heating resistors are all arranged on the conductive wire group at intervals along the length direction of the conductive wire group. The plurality of temperature sensing thermistors are connected in parallel, so that the temperature change can be monitored according to the output parallel signals as long as the temperature non-uniform change of the temperature measuring area occurs. When the temperature is reduced, the PTC heating resistors are connected in parallel, the resistance value of the PTC heating resistors increases along with the temperature rise, when the input voltage is consistent, the resistance value of the position with high temperature is high, the current is small, the heating value is small, otherwise, the heating value of the position with low temperature is large, and different heating values are provided according to the difference of the internal temperature. The PTC heating resistor can be used for synchronously heating a plurality of internal positions, and the uniformity of the internal temperature of the battery can be improved.
Description
Technical Field
The application relates to the technical field of temperature control, in particular to a temperature control device, a battery temperature control assembly and method and a battery system.
Background
Currently, lithium ion batteries are increasingly used in a variety of mobile batteries, energy storage batteries, and power sources. In winter or in the environment with lower air temperature, the lithium ion battery has the problems of low use capacity, serious attenuation, poor cycle rate performance, obvious lithium separation phenomenon, unbalanced lithium removal and intercalation and the like, has poor use experience, and affects the service life of the lithium ion battery. Therefore, in order to secure the capacity of the battery and the quick charge capacity in winter, the battery needs to be heated.
In the related art, a battery heating management system is mainly adopted for heating the battery, a liquid cooling plate heater is arranged in the battery pack, and the single battery in the battery pack is heated to a temperature range where the battery works. However, this kind of mode is on the one hand because the liquid cooling board heater can only set up in one side of battery cell, and then the heating rate is slow, and the heating is inhomogeneous, and on the other hand battery cell is in the charging process and during operation, and the inhomogeneous heating of liquid cooling board heater can further aggravate the inhomogeneous of battery cell inside temperature.
The traditional temperature detection mode for the battery generally comprises the steps that a temperature sensor extends into a single battery or is stuck to the outer wall of the battery to measure the temperature, and only the temperature value of a single point on the surface of the battery or in a battery shell can be obtained. If the temperature in the battery is uneven, the temperature change cannot be quickly monitored by the temperature measuring resistor on the surface of the battery or a detection point, and the deviation of the actual working temperature and the monitored value of the battery can be caused.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a temperature control device, a battery temperature control assembly, a battery temperature control method, and a battery system that can improve uniformity of heating of a battery and accuracy of battery temperature detection.
The temperature control device of the battery temperature control assembly comprises a conductive wire group, a temperature sensor and a PTC heater, wherein the conductive wire group is used for being paved in a temperature measuring area; the temperature sensor comprises a plurality of temperature sensing thermistors, the plurality of temperature sensing thermistors are arranged on the conductive wire group at intervals along the length direction of the conductive wire group, and the plurality of temperature sensing thermistors are connected in parallel through the conductive wire group; the PTC heater comprises a plurality of PTC heating resistors, the PTC heating resistors are arranged on the conductive wire group at intervals along the length direction of the conductive wire group, the PTC heating resistors are connected in parallel through the conductive wire group, and each PTC heating resistor is arranged at intervals with the temperature sensing thermistor.
In one embodiment, the conductive wire group comprises a temperature sensing conductive wire, a middle conductive wire and a heating conductive wire, the temperature sensing conductive wire, the middle conductive wire and the heating conductive wire are sequentially arranged in parallel at intervals, two ends of each temperature sensing thermistor are respectively arranged on the temperature sensing conductive wire and the middle conductive wire, a plurality of temperature sensing thermistors are arranged at intervals along the length direction of the temperature sensing conductive wire, two ends of each PTC heating resistor are respectively arranged on the middle conductive wire and the heating conductive wire, a plurality of PTC heating resistors are arranged at intervals along the length direction of the heating conductive wire, and the PTC heating resistors and the temperature sensing thermistors are arranged at intervals on the middle conductive wire,
in one embodiment, the conductive wire group comprises two temperature sensing conductive wires and two heating conductive wires, the two temperature sensing conductive wires are arranged in parallel, and two ends of each temperature sensing thermistor are respectively arranged on the two temperature sensing conductive wires; the two heating conductive wires are arranged in parallel, and two ends of each PTC heating resistor are respectively arranged on the two heating conductive wires.
In one embodiment, the PTC heating resistor is disposed between two adjacent temperature sensing thermistors on the intermediate conductive wire.
In one embodiment, the conductive wire group is arranged in a zigzag manner in the temperature measuring area; and/or the temperature-sensing thermistor is an NTC thermistor.
The battery temperature control assembly comprises the temperature control device, the temperature controller and the change-over switch, wherein the change-over switch is electrically connected to the conductive wire group, the change-over switch can switch and control the electrifying of the temperature sensor and/or the electrifying of the PTC heater, and the temperature controller is used for controlling whether the change-over switch is connected with the PTC heater or not according to the induction signal of the temperature sensor.
In one embodiment, the battery temperature control assembly further comprises a sampling resistor and a voltage collector, the sampling resistor is connected with the conducting wire group in series, the voltage collector is used for collecting voltages at two ends of the sampling resistor, and the temperature controller is used for judging the collection temperature of the temperature sensor according to collection signals of the voltage collector.
The battery system comprises a battery unit and the battery temperature control assembly, wherein the battery unit comprises a positive plate and a negative plate, and the negative plate and the positive plate are stacked; the temperature controller is arranged between the positive plate and the negative plate, and the temperature controller and the change-over switch are arranged outside the lamination area of the negative plate and the positive plate.
In one embodiment, the battery unit further comprises at least two battery diaphragms, two battery diaphragms are attached to each other between the positive electrode plate and the negative electrode plate, and the conductive wire group, the temperature sensor and the PTC heater are all coated between the two battery diaphragms.
Above-mentioned battery temperature control assembly and temperature controller spare, battery system thereof, the conducting wire group of temperature controller spare is laid in the temperature measurement region, and the temperature measurement region can be inside the battery, and a plurality of temperature sensing thermistors and a plurality of PTC heating resistor all set up on the conducting wire group along the length direction interval of conducting wire group, and every PTC heating resistor all sets up with temperature sensing thermistor interval, and then realizes that a plurality of temperature sensing thermistors and a plurality of PTC heating resistor disperse arrangement are in the temperature measurement region, utilizes a plurality of temperature sensing thermistors to realize the detection of a plurality of position temperatures. Because a plurality of temperature sensing thermistors are connected in parallel through the conductive wire group, the temperature measurement can be realized at multiple points, the traditional single-point temperature measurement is improved to be the temperature measurement at multiple points at the same time, and the temperature change can be monitored according to the output parallel signals as long as the temperature change of a temperature measurement area is uneven, such as the temperature increase or the temperature decrease at a certain position. When the internal temperature of the battery is reduced, the PTC heater can be started to synchronously heat a plurality of positions of the temperature measuring area. And because a plurality of PTC heating resistors are connected in parallel through the conductive wire group, and then the input voltage of a plurality of PTC heating resistors is unanimous, and the resistance value of PTC heating resistor increases along with the temperature rise, and then the resistance value of PTC heating resistor in the position of temperature is high, and the electric current is little, and calorific value is little, and the resistance value of PTC heating resistor in the position of temperature is low, and the electric current is big, and calorific value is big, realizes providing different heating temperatures according to the difference of battery inside temperature. Therefore, the PTC heating resistor can be used for synchronously heating at a plurality of positions from the inside, the heating temperature can be different according to the temperature of each position, and the uniformity of the temperature inside the battery is improved.
The battery temperature control method is applied to the battery system, and comprises the following steps:
acquiring a current temperature value monitored by a temperature sensor;
when the current temperature value is equal to or smaller than the temperature compensation temperature threshold value, the PTC heater is controlled to be started;
and after the PTC heater starts to operate for a preset temperature supplementing time, circularly acquiring the current temperature value monitored by the temperature sensor until the current temperature value is higher than the temperature supplementing temperature threshold value, and controlling the PTC heater to stop operating.
In one embodiment, the acquiring the current temperature value monitored by the temperature sensor further includes:
controlling the input voltage of the temperature sensor to be a first working voltage;
and when the current temperature value is equal to or smaller than a temperature compensation temperature threshold value, controlling the PTC heater to start, including:
when the current temperature value is equal to or smaller than a temperature compensation temperature threshold value, the temperature sensor is controlled to be disconnected, the PTC heater is controlled to be started, and the input voltage of the PTC heater is regulated to be a second working voltage; wherein the second operating voltage is greater than the first operating voltage.
According to the battery temperature control method, the conductive wire group of the temperature control device is paved in the temperature measuring area, the temperature measuring area can be the inside of the battery, the temperature of a plurality of positions is detected by utilizing the plurality of temperature sensing thermistors, if the temperature of a certain position is increased or decreased, the temperature change can be monitored according to the output parallel signals, and the current temperature value monitored by the temperature sensor can be obtained. And under the condition that the temperature is low, namely when the current temperature value monitored by the temperature sensor is equal to or less than the temperature compensation temperature threshold value, controlling the PTC heater to start. The PTC heating resistors are distributed in the temperature measuring area, so that the temperature measuring area can be synchronously heated at a plurality of positions. And because a plurality of PTC heating resistors are connected in parallel through the conductive wire group, the resistance value of the PTC heating resistor increases along with the rise of temperature, the input voltage of the plurality of PTC heating resistors is consistent, and then the resistance value of the PTC heating resistor at the position with high temperature is high, the current is small, the heating value is small, and the resistance value of the PTC heating resistor at the position with low temperature is low, the current is large, the heating value is large, and different heating temperatures are provided according to the difference of the internal temperature of the battery. And after the PTC heater is started to run for the preset temperature compensation time, circularly acquiring the current temperature value monitored by the temperature sensor until the current temperature value is higher than the temperature compensation temperature threshold value, finishing temperature compensation inside the battery, and controlling the PTC heater to stop running.
According to the battery temperature control method, the reliability and the accuracy of temperature detection are improved by using the plurality of temperature sensing thermistors, synchronous heating from a plurality of positions inside is realized by using the plurality of PTC heating resistors, the heating temperature can be different according to the temperature of each position, and the uniformity of the temperature inside the battery is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale. In the drawings:
fig. 1 is a schematic partial structure of a battery system in an embodiment.
Fig. 2 is an enlarged view of a partial structure of the battery system shown in fig. 1.
Fig. 3 is a schematic structural view of the temperature controller shown in fig. 1.
Fig. 4 is a schematic structural view of a battery temperature control assembly in an embodiment.
Fig. 5 is a flowchart of a battery temperature control method in an embodiment.
Reference numerals illustrate:
a battery temperature control assembly 10; a temperature controller 100; a conductive line group 110; a temperature-sensitive conductive wire 111; an intermediate conductive wire 112; heating the conductive wire 113; a temperature sensor 120; a temperature-sensitive thermistor 122; a PTC heater 130; a PTC heating resistor 132; a change-over switch 200; sampling resistor 300; a voltage collector 400; battery separator 20.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
Referring to fig. 1 to 3, a temperature controller 100 is disclosed to achieve at least the accuracy of temperature detection and uniformity of temperature control. Specifically, the temperature controller 100 includes a conductive wire set 110, a temperature sensor 120, and a PTC heater 130, where the conductive wire set 110 is used for being laid in a temperature measuring area. The temperature sensor 120 includes a plurality of temperature-sensing thermistors 122, the plurality of temperature-sensing thermistors 122 are disposed on the conductive wire set 110 at intervals along the length direction of the conductive wire set 110, and the plurality of temperature-sensing thermistors 122 are connected in parallel through the conductive wire set 110. The PTC heater 130 includes a plurality of PTC heating resistors 132, the plurality of PTC heating resistors 132 are disposed on the conductive wire set 110 at intervals along the length direction of the conductive wire set 110, and the plurality of PTC heating resistors 132 are connected in parallel through the conductive wire set 110, and each PTC heating resistor 132 is disposed at intervals with the temperature sensing thermistor 122.
The conductive wire set 110 of the temperature control device 100 is laid in a temperature measurement area, for example, in an embodiment, the temperature control device 100 is applied in a battery system, the temperature measurement area may be inside a battery cell, and the plurality of temperature sensing thermistors 122 are arranged on the conductive wire set 110 at intervals along the length direction of the conductive wire set 110, so as to realize that the plurality of temperature sensing thermistors 122 are distributed in the temperature measurement area, and detect temperatures at a plurality of positions by utilizing the plurality of temperature sensing thermistors 122. Because the plurality of temperature sensing thermistors 122 are connected in parallel through the conductive wire group 110, the multi-point simultaneous temperature measurement can be realized, the traditional single-point temperature measurement is improved to the multi-point simultaneous temperature measurement, and the temperature change can be monitored according to the output parallel signals as long as the temperature in the temperature measurement area is unevenly changed, such as the temperature in a certain position is increased or decreased.
Meanwhile, the plurality of PTC heating resistors 132 are arranged on the conductive wire set 110 at intervals along the length direction of the conductive wire set 110, and each PTC heating resistor 132 is arranged at intervals with the temperature sensing thermistor 122, so that the plurality of PTC heating resistors 132 are distributed and arranged in the temperature measuring area. And the PTC thermistor 132 is a positive temperature coefficient thermistor whose resistance value increases with an increase in temperature. Therefore, when the voltage of the PTC heating resistor 132 is constant, the heat generated in the low temperature environment is generally greater than that generated in the high temperature environment. This is because the PTC heating resistor 132 has a low resistance value at a low temperature, and the PTC heating resistor 132 generates a large amount of heat because the energy consumed by the PTC heating resistor 132 is converted into heat when a current passes through the resistor. In the case of high temperature, the resistance value of the PTC heating resistor 132 increases, and the power decreases when the current passes through, so that less heat is generated.
Therefore, when the internal temperature of the battery is lowered, the PTC heater 130 can be activated to heat the temperature measuring region at a plurality of positions simultaneously. And because a plurality of PTC heating resistors 132 are connected in parallel through the conductive wire group 110, and then the input voltage of a plurality of PTC heating resistors 132 is unanimous, the resistance value of PTC heating resistor 132 in the position of high temperature is high, and the electric current is little, and the calorific capacity is little, and the resistance value of PTC heating resistor 132 in the position of low temperature is low, and the electric current is big, and the calorific capacity is big, realizes providing different heating temperatures according to the difference of battery inside temperature. Therefore, the PTC heating resistor 132 can be used to heat the inside of the device at a plurality of positions simultaneously, and the heating temperature can be different according to the temperature of each position, thereby improving the uniformity of the temperature in the temperature measuring region.
In the present embodiment, the temperature-sensitive thermistor 122 is an NTC thermistor. The NTC thermistor is a negative temperature coefficient thermistor, and as the body temperature of the NTC thermistor increases, the resistance value of the NTC decreases. The battery has the characteristics of small fluctuation of resistance value-temperature characteristic and quick response to various temperature changes while realizing miniaturization, and can detect the temperature change in the battery with high sensitivity and high precision. Compared with the optical fiber temperature measurement, the NTC thermistor has low cost, simple modulation circuit and easy construction, and compared with the traditional method for collecting the single-point temperature of the positive electrode tab or the negative electrode tab of the battery cell, the NTC thermistor has high response speed and can collect a more comprehensive temperature state.
In this embodiment, the temperature sensing thermistor 122 is not a PTC thermistor. First, the NTC thermistor has a larger temperature coefficient, and the resistance value is more significantly changed with respect to the change of temperature, is more sensitive in temperature measurement, and can provide a more accurate temperature measurement result. The resistance value of the PTC thermistor has a complex relation with the temperature change, and high-precision temperature measurement is not easy to realize. Secondly, the NTC thermistor has a wider temperature measurement range and can cover a range from extremely low temperature to higher temperature. While PTC thermistors are suitable for use in high temperature areas. Then, since the temperature response of the NTC thermistor is faster, the temperature change can be sensed and reflected more quickly, and thus, it is suitable for applications requiring a higher sampling frequency and more timely response to the change. Finally, NTC thermistors produce less self-heating in operation relative to PTC thermistors, which helps to reduce errors in measurement results. Furthermore, NTCs are low in manufacturing cost and have a long service life and good stability.
In an embodiment, the conductive wire set 110 includes a temperature sensing conductive wire 111, a middle conductive wire 112 and a heating conductive wire 113, the temperature sensing conductive wire 111, the middle conductive wire 112 and the heating conductive wire 113 are sequentially arranged in parallel at intervals, two ends of each temperature sensing thermistor 122 are respectively arranged on the temperature sensing conductive wire 111 and the middle conductive wire 112, a plurality of temperature sensing thermistors 122 are arranged at intervals along the length direction of the temperature sensing conductive wire 111, two ends of each PTC heating resistor 132 are respectively arranged on the middle conductive wire 112 and the heating conductive wire 113, a plurality of PTC heating resistors 132 are arranged at intervals along the length direction of the heating conductive wire 113, and the PTC heating resistors 132 and the temperature sensing thermistors 122 are arranged at intervals on the middle conductive wire 112.
By arranging the temperature sensing conductive yarn 111 and the middle conductive yarn 112 in parallel at intervals, the plurality of temperature sensing thermistors 122 are conveniently connected in parallel. The plurality of PTC heating resistors 132 are conveniently connected in parallel by the intermediate conductive wires 112 being arranged in parallel with the heating conductive wires 113 at a spacing. And the PTC heating resistor 132 and the temperature sensing thermistor 122 share the middle conductive wire 112, so that on one hand, the arrangement space is saved, and on the other hand, the conducting wire material is saved, and the cost is further reduced.
Specifically, each of the temperature-sensing thermistors 122 is sintered on the temperature-sensing conductive wire 111 and the middle conductive wire 112, and the plurality of PTC heating resistors 132 are sintered on the middle conductive wire 112 and the heating conductive wire 113. The temperature sensing thermistor 122 and the PTC heating resistor 132 are sintered on the conductive wire set 110 using different processes. The temperature sensing thermistor 122 material and the PTC heating resistor 132 material are fixed to the conductive wire group 110 by sintering during processing, and the temperature control device 100 with a small thickness can be formed. The temperature control assembly disperses the temperature-sensing thermistor 122 and the inherent thinking of point temperature measurement by adopting parallel connection of which the whole is zero, and the resistance influence caused by the temperature of each dispersed individual temperature-sensing thermistor 122 can be reflected in the whole parallel resistor, thereby realizing the effects of line temperature measurement and surface temperature measurement. The PTC heating resistors 132 heat the surface, and the heating amount can be adaptively adjusted according to the temperature.
In an embodiment, the temperature sensing conductive wire 111, the middle conductive wire 112 and the heating conductive wire 113 are all coated with insulating layers, so that the insulating layers are used to avoid the influence of the temperature sensing conductive wire 111, the middle conductive wire 112 and the heating conductive wire 113 on the internal environment of the battery in the temperature measuring area. Specifically, the insulating layer may be a polyimide film, which has better corrosion resistance, high temperature resistance, bending resistance, and thinness, is favorable for making the temperature control device 100 small, thin, flexible, and can be arranged on different temperature measuring points according to the needs. In this embodiment, the diameters of the temperature sensing conductive wire 111, the intermediate conductive wire 112 and the heating conductive wire 113 may be about 0.05 mm.
Specifically, the temperature-sensitive thermistor 122 has a thickness of 0.2mm to 0.3mm. The thickness of the PTC heating resistor 132 is 0.2mm to 0.3mm, so that the overall thickness of the temperature controlling device 100 is small, and the temperature controlling device is conveniently arranged in an environment such as the inside of a battery, and the size of the temperature controlling device 100 is prevented from affecting the structural environment in the temperature measuring region.
In the present embodiment, a PTC heating resistor 132 is disposed between two adjacent temperature sensing thermistors 122 on the middle conductive wire 112. Since the temperature sensing thermistor 122 and the PTC heating resistor 132 share the middle conductive wire 112, the PTC heating resistor 132 can be arranged between the two temperature sensing thermistors 122, and interference between the temperature sensing thermistors 122 and the PTC heating resistor 132 is avoided.
In another embodiment, the conductive wire set 110 includes two temperature sensing conductive wires 111 and two heating conductive wires 113, the two temperature sensing conductive wires 111 are arranged in parallel, and two ends of each temperature sensing thermistor 122 are respectively arranged on the two temperature sensing conductive wires 111; the two heating conductive wires 113 are arranged in parallel, and two ends of each PTC heating resistor 132 are respectively arranged on the two heating conductive wires 113. The two temperature sensing conductive wires 111 are arranged in parallel at intervals, so that the plurality of temperature sensing thermistors 122 are conveniently connected in parallel. The two heating conductive wires 113 are arranged in parallel at intervals, so that the plurality of PTC heating resistors 132 are conveniently connected in parallel.
Specifically, each of the temperature-sensing thermistors 122 may be sintered on two of the temperature-sensing conductive wires 111. Each PTC heating resistor 132 is sintered to two heating conductive wires 113. The PTC thermistor 132 can be machined to be identical to the sensing thermistor 122.
In one embodiment, the conductive wire set 110 is configured to be arranged in a meandering manner in the temperature measurement region. By arranging the conductive wire group 110 in a zigzag manner in the temperature measurement area, the plurality of temperature sensing thermistors 122 and the plurality of PTC thermistors 132 can be distributed in zigzag manner at various positions of the temperature measurement area, so that temperature measurement and thermal compensation from point to face can be realized.
Specifically, the plurality of temperature sensing thermistors 122 are uniformly distributed at each position on the conductive wire set 110, so that the temperature at each position of the temperature measuring region can be uniformly detected. In other embodiments, the temperature sensing thermistors 122 may be unevenly distributed in the conductive line set 110, as may be desired for temperature measurement.
Specifically, the PTC heating resistors 132 are uniformly distributed at each position on the conductive wire set 110, so that temperature compensation can be uniformly performed for each position of the temperature measurement region. In other embodiments, the plurality of PTC heating resistors 132 may also be unevenly distributed within the conductive wire set 110, as may be required for temperature compensation.
Referring to fig. 3 and fig. 4, in an embodiment, the application further discloses a battery temperature control assembly 10, where the battery temperature control assembly 10 includes the temperature control device 100, the temperature controller, and the switch 200 in any of the embodiments, the switch 200 is electrically connected to the conductive wire set 110, the switch 200 is capable of switching and controlling the power on of the temperature sensor 120 and/or the power on of the PTC heater 130, and the temperature controller is used for controlling whether the switch 200 is turned on the PTC heater 130 according to the sensing signal of the temperature sensor 120. For example, the change-over switch 200 can switch control the energization of the temperature sensor 120 or the energization of the PTC heater 130. In other embodiments, the changeover switch 200 may also keep the temperature sensor 120 on when switching on the PTC heater 130.
The temperature controller obtains the current temperature value monitored by the temperature sensor 120, and when the current temperature value is equal to or smaller than the temperature compensation temperature threshold value, the temperature controller controls the change-over switch 200 to enable the PTC heater 130 to be electrified and started, and the PTC heater 130 is used for heating to realize temperature compensation, so that the temperature of the temperature measurement area is balanced. After the PTC heater 130 is started to operate for a preset temperature compensation time, the temperature controller circularly acquires the current temperature value monitored by the temperature sensor 120 until the current temperature value is higher than the temperature compensation temperature threshold value, and the temperature controller controls the change-over switch 200 to switch on the temperature sensor 120, so that the PTC heater 130 stops operating. By providing the temperature controller and the change-over switch 200, the operation of the PTC heater 130 can be started according to the result detected by the temperature sensor 120, preventing the PTC heater 130 from being excessively heated or being not heated in place.
In this embodiment, the switch 200 is connected to the intermediate conductive wire 112, and the switch 200 is used for switching and connecting the intermediate conductive wire 112 and the temperature sensing conductive wire 111 or the intermediate conductive wire 112 and the heating conductive wire 113.
In this embodiment, the temperature controller may be used to control the operation, switching time, and switching frequency of the switch 200. Further, the temperature controller may also be used to control the input voltage. For example, the operating voltage of the PTC heater 130 may be 220V ac or 12V, 24V, 36V, 48V dc, etc., and the operating voltage of the temperature sensor 120 may be 5V dc or 24V dc, etc., to ensure that the current is less than 1mA. And then the input voltage can be controlled to be changed when the PTC heater 130 and the temperature sensor 120 are switched on, so as to adapt to the requirements of the PTC heater 130 and the temperature sensor 120 on different working voltages.
In an embodiment, the battery temperature control assembly 10 further includes a sampling resistor 300 and a voltage collector 400, the sampling resistor 300 is connected in series with the conductive wire set 110, the voltage collector 400 is used for collecting voltages at two ends of the sampling resistor 300, and the temperature controller is used for judging the collection temperature of the temperature sensor 120 according to the collection signal of the voltage collector 400. Specifically, the sampling resistor 300 is connected in series with the middle conductive wire 112, and since the sampling resistor 300 is connected in series with the temperature sensor 120, when the temperature sensor 120 is turned on, the voltages at two ends of the temperature sensor 120 can be obtained by the voltages at two ends of the sampling resistor 300 collected by the voltage collector 400, and then the resistance value of the temperature sensor 120 can be obtained, i.e. the temperature value monitored by the temperature sensor 120 can be converted. When the PTC heater 130 is turned on, the resistance value of the PTC heater 130 and thus the heat generation amount of the PTC heater 130 can be obtained. In the present embodiment, the voltage collector 400 is an analog-to-digital converter ADC.
In other embodiments, the voltage values of the temperature sensor 120 and the PTC heater 130 may be obtained in other manners, as long as the resistance values of the temperature sensor 120 and the PTC heater 130 can be obtained.
Referring to fig. 1 and fig. 4, in an embodiment, the present application further discloses a battery system, where the battery system includes a battery unit and the battery temperature control assembly 10 in any one of the foregoing embodiments, the battery unit includes a positive electrode plate and a negative electrode plate, and the negative electrode plate and the positive electrode plate are stacked; the temperature controller 100 is disposed between the positive electrode sheet and the negative electrode sheet, and the temperature controller and the change-over switch 200 are disposed outside the lamination area of the negative electrode sheet and the positive electrode sheet. Through setting up temperature controller 100 between positive plate and negative plate, can effectively follow the inside of battery monomer and carry out temperature measurement and temperature compensation, improve the readiness to battery temperature measurement, temperature compensation's homogeneity promptly.
In an embodiment, the battery unit further includes at least two battery diaphragms 20, two battery diaphragms 20 attached to each other are disposed between the positive electrode plate and the negative electrode plate, and the conductive wire set 110, the temperature sensor 120 and the PTC heater 130 are all wrapped between the two battery diaphragms 20. Through cladding temperature controller 100 between two battery diaphragms 20, be favorable to temperature controller 100 to set up between positive plate and negative plate, and utilize battery diaphragms 20 to reduce temperature controller 100 to the influence of positive plate and negative plate when the during operation, keep temperature controller 100 to set up stability and reliability. The temperature control device 100 has smaller thickness, is arranged between the two battery diaphragms 20, and has smaller thickness after the two battery diaphragms 20 are attached, so that the influence of the temperature control device 100 on the internal structure of the battery cell in the space dimension is reduced.
The battery separator 20 is disposed between the positive electrode and the negative electrode, and has a main function of separating positive and negative electrode active materials, preventing the electrodes from being short-circuited by contact, and also has a function of allowing electrolyte ions to pass through. In view of the position of the battery diaphragm 20, the temperature controller 100 is provided, so that the functions of monitoring the internal temperature of the battery cell and compensating the temperature can be effectively realized.
Referring to fig. 1, fig. 4 and fig. 5, in an embodiment, the present application further discloses a battery temperature control method, which is applied to the battery system in any one of the above embodiments. Specifically, the battery temperature control method includes:
step S100: acquiring a current temperature value monitored by the temperature sensor 120;
step S200: when the current temperature value is equal to or less than the temperature compensation temperature threshold value, the PTC heater 130 is controlled to be started;
step S300: after the PTC heater 130 is started to operate for a preset temperature compensation time, the current temperature value monitored by the temperature sensor 120 is circularly obtained until the current temperature value is higher than the temperature compensation temperature threshold value, and the PTC heater 130 is controlled to stop operating.
In the above method for controlling the temperature of the battery, the conductive wire set 110 of the temperature control device 100 is laid in a temperature measuring area, which may be the inside of the battery, and the temperature measuring area uses a plurality of temperature sensing thermistors 122 to detect the temperature at a plurality of positions, for example, the temperature at a certain position increases or decreases, and according to the output parallel signal, the temperature change can be monitored, so as to obtain the current temperature value monitored by the temperature sensor 120. In the case where the temperature is low, that is, when the current temperature value monitored by the temperature sensor 120 is equal to or less than the temperature compensation temperature threshold value, the PTC heater 130 is controlled to be activated. The PTC heating resistors 132 are distributed in the temperature measuring region, so that a plurality of positions of the temperature measuring region can be heated synchronously. And because a plurality of PTC heating resistors 132 are connected in parallel through the conductive wire group 110, the resistance value of the PTC heating resistor 132 increases along with the increase of the temperature, the input voltage of the plurality of PTC heating resistors 132 is consistent, and then the resistance value of the PTC heating resistor 132 at the position with high temperature is high, the current is small, the heating value is small, and the resistance value of the PTC heating resistor 132 at the position with low temperature is low, the current is large, the heating value is large, and different heating temperatures are provided according to the difference of the internal temperature of the battery. After the PTC heater 130 is started to operate for a preset temperature compensation time, the current temperature value monitored by the temperature sensor 120 is circularly obtained until the current temperature value is higher than the temperature compensation temperature threshold value, so that temperature compensation of the inside of the battery is completed, and the PTC heater 130 is controlled to stop operating.
The battery temperature control method improves the reliability and accuracy of temperature detection by using the plurality of temperature sensing thermistors 122, realizes synchronous heating from a plurality of positions inside by using the plurality of PTC heating resistors 132, and improves the uniformity of the temperature inside the battery by changing the heating temperature according to the temperature of each position.
In one embodiment, the step S100: acquiring the current temperature value monitored by the temperature sensor 120, previously further includes:
controlling the input voltage of the temperature sensor 120 to be a first operating voltage;
the step S200: when the current temperature value is equal to or less than the temperature compensation temperature threshold value, the PTC heater 130 is controlled to be started, including:
when the current temperature value is equal to or less than the temperature compensation temperature threshold value, the temperature sensor 120 is controlled to be disconnected, the PTC heater 130 is controlled to be started, and the input voltage of the PTC heater 130 is regulated to be a second working voltage; wherein the second operating voltage is greater than the first operating voltage.
Since the operating voltage of the PTC heater 130 may be 220V ac or 12V, 24V, 36V, 48V, etc., the operating voltage of the temperature sensor 120 may be 5V dc or 24V dc, etc., and the current is ensured to be less than 1mA. And when the temperature sensor 120 works, the control input voltage is the first working voltage, so that the temperature sensor 120 is ensured to be used stably and reliably, and when the PTC heater 130 is started, the input voltage is switched to the second working voltage, so that the PTC heater 130 can effectively heat and compensate the battery, and the requirements of the PTC heater 130 and the temperature sensor 120 on different working voltages are met.
In one embodiment, the step S100: acquiring the current temperature value monitored by the temperature sensor 120, and then further comprises:
when the current temperature value is greater than the alarm temperature threshold value, starting a safety control program; wherein the alarm temperature threshold is greater than the first temperature threshold.
When the current temperature value is larger than the alarm temperature threshold value, the local temperature of the temperature measuring area is proved to reach the alarm temperature at the moment, safety processing is needed, and a safety control program is started. For example, in the battery cell, the safety control program may be to perform a power-off process on the battery cell to reduce the internal temperature of the battery cell. In other embodiments, the security control program may be other secure processing programs.
In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A battery system, the battery system comprising:
the battery unit comprises a positive plate and a negative plate, and the negative plate and the positive plate are stacked; and
The battery temperature control assembly comprises a temperature control device, a temperature controller and a change-over switch, wherein the temperature control device is arranged between the positive plate and the negative plate, and the temperature controller and the change-over switch are arranged outside the lamination area of the negative plate and the positive plate; the temperature control device comprises a conductive wire set, a temperature sensor and a PTC heater, wherein the conductive wire set is used for being laid in a temperature measuring area and comprises a temperature sensing conductive wire, a middle conductive wire and a heating conductive wire, and the temperature sensing conductive wire, the middle conductive wire and the heating conductive wire are arranged in parallel at intervals in sequence; the temperature sensor comprises a plurality of temperature sensing thermistors, two ends of each temperature sensing thermistor are respectively arranged on the temperature sensing conductive wire and the middle conductive wire, and the plurality of temperature sensing thermistors are arranged at intervals along the length direction of the temperature sensing conductive wire; the PTC heater comprises a plurality of PTC heating resistors, two ends of each PTC heating resistor are respectively arranged on the middle conductive wire and the heating conductive wire, the plurality of PTC heating resistors are arranged at intervals along the length direction of the heating conductive wire, and the PTC heating resistors and the temperature sensing thermistor are arranged at intervals on the middle conductive wire;
the change-over switch is electrically connected to the conductive wire group, the change-over switch can switch and control the temperature sensor to be electrified and/or the PTC heater to be electrified, and the temperature controller is used for controlling whether the change-over switch is connected with the PTC heater or not according to the induction signal of the temperature sensor.
2. The battery system of claim 1, wherein the switch is connected to the intermediate conductive wire, and the switch is configured to switch between communicating the intermediate conductive wire with the temperature sensing conductive wire or between communicating the intermediate conductive wire with the heating conductive wire.
3. The battery system of claim 1, wherein one of the PTC heating resistors is provided between two adjacent ones of the temperature sensing thermistors on the intermediate conductive wire.
4. A battery system according to any one of claims 1-3, wherein the set of conductive wires is arranged in a meandering manner in the temperature measuring region; and/or the temperature-sensing thermistor is an NTC thermistor.
5. A battery system according to any one of claims 1 to 3, wherein the temperature-sensitive thermistor has a thickness of 0.2mm to 0.3mm; the thickness of the PTC heating resistor is 0.2mm-0.3mm.
6. The battery system of any one of claims 1-3, wherein the temperature sensing wire, the intermediate wire, and the heating wire are each coated with an insulating layer.
7. The battery system of any one of claims 1-3, wherein the battery temperature control assembly further comprises a sampling resistor and a voltage collector, the sampling resistor is connected in series with the intermediate conductive wire, the voltage collector is used for collecting voltages at two ends of the sampling resistor, and the temperature controller is used for judging the collection temperature of the temperature sensor according to the collection signal of the voltage collector.
8. The battery system of any one of claims 1-3, wherein the battery cell further comprises at least two battery separator sheets, two battery separator sheets attached to each other are disposed between the positive electrode sheet and the negative electrode sheet, and the conductive wire group, the temperature sensor and the PTC heater are all wrapped between the two battery separator sheets.
9. A battery temperature control method applied to the battery system according to any one of claims 1 to 8, characterized in that the battery temperature control method comprises:
acquiring a current temperature value monitored by a temperature sensor;
when the current temperature value is equal to or smaller than the temperature compensation temperature threshold value, the PTC heater is controlled to be started;
and after the PTC heater starts to operate for a preset temperature supplementing time, circularly acquiring the current temperature value monitored by the temperature sensor until the current temperature value is higher than the temperature supplementing temperature threshold value, and controlling the PTC heater to stop operating.
10. The battery temperature control method according to claim 9, wherein the acquiring the current temperature value monitored by the temperature sensor further comprises, before:
controlling the input voltage of the temperature sensor to be a first working voltage;
and when the current temperature value is equal to or smaller than a temperature compensation temperature threshold value, controlling the PTC heater to start, including:
when the current temperature value is equal to or smaller than a temperature compensation temperature threshold value, the temperature sensor is controlled to be disconnected, the PTC heater is controlled to be started, and the input voltage of the PTC heater is regulated to be a second working voltage; wherein the second operating voltage is greater than the first operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410070866.3A CN117594917B (en) | 2024-01-18 | 2024-01-18 | Temperature controller, battery temperature control assembly and method, and battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410070866.3A CN117594917B (en) | 2024-01-18 | 2024-01-18 | Temperature controller, battery temperature control assembly and method, and battery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117594917A CN117594917A (en) | 2024-02-23 |
| CN117594917B true CN117594917B (en) | 2024-03-26 |
Family
ID=89916960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410070866.3A Active CN117594917B (en) | 2024-01-18 | 2024-01-18 | Temperature controller, battery temperature control assembly and method, and battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117594917B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320506A (en) * | 2007-12-26 | 2008-12-10 | 张陈 | Series connection separated recoverable linear temperature-sensitive detector |
| JP2009230900A (en) * | 2008-03-19 | 2009-10-08 | Toshiba Corp | Non-aqueous electrolyte secondary battery pack |
| JP2009264804A (en) * | 2008-04-23 | 2009-11-12 | Murata Mfg Co Ltd | Planar temperature detection sensor |
| WO2013008882A1 (en) * | 2011-07-12 | 2013-01-17 | 株式会社 豊田自動織機 | Temperature detection device |
| CN217037489U (en) * | 2022-04-21 | 2022-07-22 | 岳富华 | High-power heating assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8828570B2 (en) * | 2011-06-29 | 2014-09-09 | Hewlett-Packard Development Company, L.P. | Battery temperature sensor |
-
2024
- 2024-01-18 CN CN202410070866.3A patent/CN117594917B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320506A (en) * | 2007-12-26 | 2008-12-10 | 张陈 | Series connection separated recoverable linear temperature-sensitive detector |
| JP2009230900A (en) * | 2008-03-19 | 2009-10-08 | Toshiba Corp | Non-aqueous electrolyte secondary battery pack |
| JP2009264804A (en) * | 2008-04-23 | 2009-11-12 | Murata Mfg Co Ltd | Planar temperature detection sensor |
| WO2013008882A1 (en) * | 2011-07-12 | 2013-01-17 | 株式会社 豊田自動織機 | Temperature detection device |
| CN217037489U (en) * | 2022-04-21 | 2022-07-22 | 岳富华 | High-power heating assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117594917A (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6444350B1 (en) | Battery unit which can detect an abnormal temperature rise of at least one of a plurality of cells | |
| US20130108896A1 (en) | Methods and apparatus for combined thermal management, temperature sensing, and passive balancing for battery systems in electric vehicles | |
| JP4079871B2 (en) | Pack battery | |
| CN112599889B (en) | Self-heating control method of lithium ion battery | |
| CN105161793A (en) | Power battery heating device and control method | |
| EP3270454B1 (en) | Battery module and method for monitoring a battery module | |
| CN106684501A (en) | Power supply device and automobile | |
| US9040186B2 (en) | Method and device to measure temperature of a prismatic cell of automotive battery | |
| CN112186309B (en) | Temperature difference control method of battery pack and battery pack | |
| CN117594917B (en) | Temperature controller, battery temperature control assembly and method, and battery system | |
| CN211320266U (en) | Lithium battery temperature control device and lithium battery | |
| CN113252199B (en) | Temperature sensor | |
| CN206432351U (en) | A kind of lithium battery that can be used in low temperature environment | |
| CN209730114U (en) | A kind of battery and batter-charghing system | |
| CN110636648B (en) | Thick film heater and steam generator | |
| CN117613468B (en) | Battery temperature monitoring method and battery temperature control system | |
| JP2008097836A (en) | Cell life determination device | |
| CN117594895B (en) | Battery temperature monitoring assembly, battery system and battery temperature monitoring method | |
| CN212323080U (en) | Battery heating control device | |
| JP4656677B2 (en) | Deteriorated battery detector | |
| CN109188286A (en) | A kind of determination method and device of battery system temperature difference influence factor | |
| CN220358168U (en) | Battery cell, battery pack and vehicle | |
| CN114335815A (en) | Heating method of lithium ion battery pack | |
| CN219937136U (en) | Battery cell | |
| KR20230151693A (en) | Matrix structure type temperature sensor device for battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |