CN210040468U - Low-temperature heating device for lithium ion battery - Google Patents

Low-temperature heating device for lithium ion battery Download PDF

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CN210040468U
CN210040468U CN201921007511.0U CN201921007511U CN210040468U CN 210040468 U CN210040468 U CN 210040468U CN 201921007511 U CN201921007511 U CN 201921007511U CN 210040468 U CN210040468 U CN 210040468U
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temperature
lithium ion
ion battery
heating
low
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孙晓玉
李炳江
姜俊杰
王唤
吴丽军
王立群
肖宁
王艳雯
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JIANGSU ZHIHANG NEW ENERGY Co Ltd
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    • Y02E60/10Energy storage using batteries

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Abstract

The utility model discloses a low-temperature heating device for a lithium ion battery, which comprises a lithium ion battery consisting of a naked battery cell, a shell and a cap, a power supply, a high-temperature resistant insulating film arranged on the surface of the naked battery cell, a heating resistor component and a temperature sensing probe arranged on the high-temperature resistant insulating film, and a controller respectively connected with the heating resistor component and the temperature sensing probe; the terminal cap is provided with a wire hole, the heating resistance element is connected with the anode lug and the cathode lug of the bare cell respectively, and the controller is connected with the power supply. The utility model discloses a heating resistor components and parts are direct and the naked electric core contact of lithium ion battery, and heat transfer is fast, can effectively detect naked electric core temperature, and the low temperature cycle is longe-lived, and can not occupy the battery space.

Description

Low-temperature heating device for lithium ion battery
Technical Field
The utility model belongs to lithium ion battery low temperature performance improves field, concretely relates to lithium ion battery low temperature heating device.
Background
The lithium ion battery is also called as rocking chair battery, and is a novel green energy battery successfully developed in the 21 st century. Lithium ion batteries have been used in electronic devices such as mobile phones, digital cameras, notebook computers, and portable power sources, and have been used in the field of electric vehicles with the call for and development of clean energy.
With the increasing demand for transportation tools and the increasing pace of life, the demand for lithium ion batteries as a new type of environmentally friendly energy is increasing, and further improvement in cycle performance and charging speed performance of lithium ion batteries is required. One of the main short plates that currently restrict the development of lithium ion batteries is low temperature cycle life and poor charging and discharging efficiency.
Aiming at the improvement of the low-temperature performance of the lithium ion battery, the current main heating modes are as follows: firstly, the heating is carried out by an external power supply, but the external power supply occupies the space of a battery pack, the energy density of a system is influenced, and the using effect is poor; self-heating, namely, the inherent internal resistance is heated through self-pulse charging and discharging, so as to achieve the purpose of increasing the temperature of the battery system, but the self internal resistance of the battery is smaller, and the method influences the service life of the battery, so the use effect is not good.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a lithium ion battery low temperature heating device, through heating resistance components and parts direct with the naked electric core contact of lithium ion battery, heat transfer is fast, can effectively detect naked electric core temperature, low temperature cycle is longe-lived, and can not occupy the battery space.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model provides a low-temperature heating device for a lithium ion battery, which comprises a lithium ion battery consisting of a naked electric core, a shell and a cap, a power supply, a high-temperature resistant insulating film arranged on the surface of the naked electric core, a heating resistance component and a temperature sensing probe arranged on the high-temperature resistant insulating film, and a controller respectively connected with the heating resistance component and the temperature sensing probe; the terminal cap is provided with a wire hole, the heating resistance element is connected with the anode lug and the cathode lug of the bare cell respectively, and the controller is connected with the power supply.
Furthermore, the heating resistance component is spirally attached to the high-temperature-resistant insulating film on the surface of the bare cell, and the temperature sensing probe and the surface of the heating resistance component are fixedly protected by a high-temperature-resistant insulating adhesive tape.
Furthermore, the heating resistance component is in a wire shape, a sheet shape or a strip shape, the material of the heating resistance component is nickel-chromium alloy, iron-chromium-aluminum alloy, tungsten wire or semiconductor, and the resistance value of the heating resistance component is 1 omega-10 omega.
Further, the controller is S7-200PLC or S7-300PLC, and comprises an overcurrent protector, a control switch and a power supply; when the temperature of the naked battery core is lower than a set temperature value, the control switch is closed, and the heating resistance element starts to work; when naked electric core temperature is higher than the temperature value of settlement, control switch disconnection, heating resistance components and parts stop work.
Further, the temperature sensing probe connection controller specifically includes: the temperature sensing probe is connected to the input end interface of the controller through a wire hole formed in the cap.
Further, the heating resistance components and parts with naked electric core anodal utmost point ear and negative pole utmost point ear are connected respectively and specifically include: one end of the heating resistance component is connected with the anode tab of the bare cell, and the other end of the heating resistance component is connected to the input end interface of the controller through a wire hole arranged on the cap; the controller output end interface is connected with one end of the heating resistor component, and the other end of the heating resistor component is connected into the negative electrode lug of the bare cell through a wire hole formed in the cap.
Further, the heating resistor component is welded to the anode lug and the cathode lug of the bare cell through ultrasonic welding.
Further, the wire hole that sets up on the block is sealed with the encapsulating mode.
Further, the naked electric core is composed of a negative electrode, a diaphragm, a positive electrode and an electrolyte, wherein the diaphragm is solid and lithium ions can pass through reversibly.
The utility model discloses beneficial effect as follows: the utility model discloses a heating resistor components and parts are direct and the naked electric core contact of lithium ion battery, and heat transfer is fast, can effectively detect naked electric core temperature, and the low temperature cycle is longe-lived, and can not occupy the battery space.
Drawings
Fig. 1 is a schematic diagram illustrating an assembly of a bare cell in a low-temperature heating apparatus for a lithium ion battery according to an embodiment of the present invention;
fig. 2 is the utility model discloses lithium ion battery low temperature heating device schematic diagram.
Wherein: the battery comprises a bare cell 1, a positive electrode tab 2, a negative electrode tab 3, a cap 4, a heating resistor element 5, a temperature sensing probe 6, a lithium ion battery 7, a controller 8 and a power supply 9.
Detailed Description
In order to understand the features and technical contents of the present invention in more detail, the following description is given in conjunction with the accompanying drawings, which are only used for reference and not for limiting the present invention.
Fig. 1 is a schematic diagram illustrating an assembly of bare cells in a low-temperature heating device for lithium ion batteries, and fig. 2 is a schematic diagram illustrating a single body of a low-temperature heating device for lithium ion batteries according to an embodiment of the present invention, as shown in fig. 1 and 2, including a lithium ion battery 7 composed of a bare cell 1, a housing, and a cap 4, a power supply 9, a high-temperature insulating film disposed on the surface of the bare cell 1, a heating resistor element 5 and a temperature sensing probe 6 disposed on the high-temperature insulating film, and a controller 8 connected to the heating resistor element 5 and the temperature sensing probe 6 respectively; the battery cover is characterized in that a wire hole is formed in the cover cap 4, the heating resistor component 5 is connected with the anode tab 2 and the cathode tab 3 of the bare cell respectively, and the controller 8 is connected with the power supply 9.
Preferably, the heating resistance element 5 is spirally attached to the high-temperature-resistant insulating film on the surface of the bare cell 1, and the temperature sensing probe 6 and the surface of the heating resistance element 5 are both fixedly protected by a high-temperature-resistant insulating tape.
Here, the high temperature resistant insulating film may be a high temperature resistant PE film.
Preferably, the heating resistance component 5 is in a shape of wire, sheet or strip, the material is nickel-chromium alloy, iron-chromium-aluminum alloy, tungsten wire or semiconductor, and the resistance value of the heating resistance component 5 is 1 Ω -10 Ω.
Here, the heating resistor component may be 0Cr21Al6Nb in model number.
Here, the capacity of the lithium ion battery 7 is preferably 0Ah to 200 Ah.
Here, the controller 8 may be an S7-200PLC or an S7-300PLC, and includes an overcurrent protector, a control switch, and a power supply; when the temperature of the bare cell 1 is lower than a set temperature value, the control switch is closed, and the heating resistance element 5 starts to work; when the temperature of the naked electric core 1 is higher than a set temperature value, the control switch is switched off, and the heating resistance element 5 stops working.
Preferably, the set temperature value can be any value in the range of 0-20 ℃, and when the temperature of the bare cell 1 is lower than any value between 0-20 ℃, the control switch is closed, and the heating resistance element 5 starts to work; when naked electric core 1 temperature is higher than when control switch is closed the temperature value of setting for, control switch disconnection, heating resistance components and parts 5 stop work.
Here, the temperature sensing probe 6 and the controller 8 specifically include: the temperature sensing probe 6 is connected to the input end interface of the controller 8 through a wire hole arranged on the cap 4.
Here, the temperature sensing probe may be an ATS1-82 temperature sensor.
Here, heating resistance components and parts 5 with naked electric core positive pole utmost point ear 2 and negative pole utmost point ear 3 are connected respectively and specifically include: one end of the heating resistance component 5 is connected with the anode tab 2 of the bare cell, and the other end of the heating resistance component is connected to an input end interface of the controller 8 through a wire hole arranged on the cap 4; the output end interface of the controller 8 is connected with one end of the heating resistance component 5, and the other end of the heating resistance component is connected into the bare cell negative electrode tab 3 through a wire hole formed in the cap 4.
Here, an output terminal of the temperature sensing probe 6 is interfaced with an input terminal of the controller 8.
Preferably, the heating resistance element 5 is welded to the positive pole lug 2 and the negative pole lug 3 of the bare cell through ultrasonic welding.
Preferably, the wire hole arranged on the cap 4 is sealed by glue filling.
Here, the bare cell 1 is composed of a negative electrode, a separator, a positive electrode, and an electrolyte, the separator being solid and lithium ions being able to pass reversibly.
Here, the negative electrode includes a current collector and a negative active material, wherein the negative active material is graphite or silicon carbon; the positive electrode comprises a current collector and a positive active material, wherein the positive active material is a high nickel-based positive material; the electrolyte is a common organic electrolyte, an ionic liquid electrolyte, or a mixture thereof.
Preferably, the lithium ion battery type number may be: 14430, 14500, 14650, 17280, 17335, 17500, 18490, 18650, 18740, 21700, 22430, 26650, 32650, etc., and specific lithium ion battery types are not limited.
The embodiment of the utility model provides a lithium ion battery low temperature heating device specific work flow: when the temperature sensing probe detects that the temperature of the naked electric core is lower than a set temperature value, the controller controls the heating resistance element to heat the naked electric core of the lithium ion battery; when the temperature sensing probe detects that the temperature of the naked electric core is higher than a set temperature value, the controller controls the heating resistance element to stop heating the naked electric core of the lithium ion battery.
Through direct and the naked electric core contact of lithium ion battery of heating resistance components and parts, heat transfer is fast, can effectively detect naked electric core temperature, and low temperature cycle is longe-lived, and can not occupy the battery space.
Use 2.6Ah below, the model is 18650 batteries as the test object, tests to big multiplying power circulation performance under the low temperature environment, nevertheless the utility model discloses not only to this type battery.
Example one
No heating resistance wire, adjusting the environment temperature to-20 ℃, charging at 0.5 ℃, and discharging at 3.0 ℃.
Example two
No heating resistance wire, adjusting the environment temperature to-10 ℃, charging at 0.5 ℃, and discharging at 3.0 ℃.
EXAMPLE III
Heating resistance wire with 1 omega, adjusting environment temperature to-20 deg.C, charging at 0.5 deg.C, and discharging at 3.0 deg.C for circulation.
Example four
Heating resistance wire with 1 omega, adjusting environment temperature to-10 deg.C, charging at 0.5 deg.C, and discharging at 3.0 deg.C for circulation.
EXAMPLE five
And 3 omega heating resistance wires are used, the environment temperature is adjusted to-20 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
EXAMPLE six
And 3 omega heating resistance wires are used, the environment temperature is adjusted to-10 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
EXAMPLE seven
And 5 omega heating resistance wires are used, the environment temperature is adjusted to-20 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
Example eight
And 5 omega heating resistance wires are used, the environment temperature is adjusted to-10 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
Example nine
And (3) adjusting the ambient temperature to-20 ℃ by using a 7 omega heating resistance wire, charging at 0.5 ℃ and discharging at 3.0 ℃.
Example ten
And (3) adjusting the ambient temperature to-10 ℃ by using a 7 omega heating resistance wire, charging at 0.5 ℃ and discharging at 3.0 ℃.
EXAMPLE eleven
And a 10 omega heating resistance wire is used, the environment temperature is adjusted to-20 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
Example twelve
And a 10 omega heating resistance wire is used, the environment temperature is adjusted to-10 ℃, charging is carried out at 0.5 ℃, and discharging is carried out at 3.0 ℃.
The battery cycle cutoff condition in the example was a capacity fade to 80%, and the experimental results are shown in table 1:
TABLE 1 results of the experiment
Figure BDA0002114137270000071
Figure BDA0002114137270000081
The experimental result shows that the battery can only circulate for 200 weeks under the environment of-20 ℃ and 356 weeks under the environment of-10 ℃ without heating conditions; after the heating resistance element is assembled, the cycle performance is greatly improved, experiments show that the 7 omega heating resistance element is matched under the environment of-20 ℃, the battery cycle can reach 1005 weeks, and the 7 omega heating resistance element is matched under the environment of-10 ℃, so that the battery cycle can reach 1125 weeks, the battery space cannot be occupied, the heating resistance element is directly contacted with a bare lithium ion battery cell, the heat transfer is fast, the temperature of the bare lithium ion battery cell can be effectively detected, and the low-temperature cycle life is long.
Here, specific types of the above-mentioned devices are not limited and detailed, and deep connection modes of the above-mentioned devices are not described in detail, and those skilled in the art can understand the above-mentioned devices as common general knowledge.
The embodiment of the present invention is only to introduce the specific implementation manner, and is not limited to the protection scope. The present invention is not limited to the above embodiments, but can be modified in various ways without departing from the scope of the present invention.

Claims (9)

1. A low-temperature heating device for a lithium ion battery comprises the lithium ion battery and a power supply, wherein the lithium ion battery is composed of a naked electric core, a shell and a cap, and is characterized by further comprising a high-temperature-resistant insulating film arranged on the surface of the naked electric core, a heating resistor element and a temperature sensing probe arranged on the high-temperature-resistant insulating film, and a controller respectively connected with the heating resistor element and the temperature sensing probe; the terminal cap is provided with a wire hole, the heating resistance element is connected with the anode lug and the cathode lug of the bare cell respectively, and the controller is connected with the power supply.
2. The low-temperature heating device for the lithium ion battery of claim 1, wherein the heating resistance element is spirally attached to the high-temperature-resistant insulating film on the surface of the bare cell, and the temperature sensing probe and the surface of the heating resistance element are both fixedly protected by a high-temperature-resistant insulating tape.
3. The low-temperature heating device for the lithium ion battery as claimed in claim 1 or 2, wherein the heating resistance component is in a shape of wire, sheet or strip, is made of nichrome, iron-chromium-aluminum alloy, tungsten wire or semiconductor, and has a resistance value of 1 Ω -10 Ω.
4. The low-temperature heating device for the lithium ion battery as claimed in claim 1, wherein the controller is an S7-200PLC or an S7-300PLC, and comprises an overcurrent protector, a control switch and a power supply; when the temperature of the naked battery core is lower than a set temperature value, the control switch is closed, and the heating resistance element starts to work; when naked electric core temperature is higher than the temperature value of settlement, control switch disconnection, heating resistance components and parts stop work.
5. The low-temperature heating device for the lithium ion battery according to claim 1, wherein the temperature sensing probe is connected to the controller and specifically comprises: the temperature sensing probe is connected to the input end interface of the controller through a wire hole formed in the cap.
6. The low-temperature heating device for the lithium ion battery of claim 1, wherein the heating resistor component is connected with the positive electrode tab and the negative electrode tab of the bare cell respectively and specifically comprises: one end of the heating resistance component is connected with the anode tab of the bare cell, and the other end of the heating resistance component is connected to the input end interface of the controller through a wire hole arranged on the cap; the controller output end interface is connected with one end of the heating resistor component, and the other end of the heating resistor component is connected into the negative electrode lug of the bare cell through a wire hole formed in the cap.
7. The low-temperature heating device for the lithium ion battery as claimed in claim 1 or 5, wherein the heating resistor element is welded to the positive electrode tab and the negative electrode tab of the bare cell by ultrasonic welding.
8. The low-temperature heating device for the lithium ion battery as claimed in claim 1, wherein the wire hole formed in the cap is sealed by glue filling.
9. The low-temperature heating device for the lithium ion battery according to claim 1, wherein the bare cell comprises a negative electrode, a separator, a positive electrode and an electrolyte, the separator is solid and lithium ions can pass through reversibly.
CN201921007511.0U 2019-07-01 2019-07-01 Low-temperature heating device for lithium ion battery Active CN210040468U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112382807A (en) * 2020-11-11 2021-02-19 北京理工大学 Cylindrical battery structure for low-temperature heating
CN114759277A (en) * 2022-05-12 2022-07-15 天津市捷威动力工业有限公司 Low-temperature discharge method of lithium ion battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112382807A (en) * 2020-11-11 2021-02-19 北京理工大学 Cylindrical battery structure for low-temperature heating
CN114759277A (en) * 2022-05-12 2022-07-15 天津市捷威动力工业有限公司 Low-temperature discharge method of lithium ion battery

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