CN-122025919-A - Battery heating system, battery heating method, and storage medium

CN122025919ACN 122025919 ACN122025919 ACN 122025919ACN-122025919-A

Abstract

The application discloses a battery heating system, a battery heating method and a storage medium, wherein the battery heating system comprises a battery, a temperature monitoring device, a heating element, a marker monitoring device and a controller, electrolyte of the battery comprises lithium ions marked by fluorescence, the temperature monitoring device is arranged on a diaphragm or a pole piece of an electric core and is used for monitoring temperature information of the electrolyte, the heating element and the temperature monitoring device are arranged in a stacked mode and are used for heating the battery, the marker monitoring device is used for monitoring concentration information of the lithium ions marked by fluorescence on an interface of any layer of pole piece of the electric core, and the controller is respectively connected with the temperature monitoring device, the marker monitoring device and the heating element and is used for receiving the temperature information and the concentration information and controlling heating power of the heating element according to the temperature information and/or the concentration information. The reliability of the battery in a low-temperature environment is improved.

Inventors

LI QIAN
WANG HAN
LI JINQI
LAI YAJUAN
LUO ZIHAN
DONG ZHENXING
WANG JIAO

Assignees

湖北亿纬动力有限公司

Dates

Publication Date: 20260512
Application Date: 20251226

Claims (13)

1. A battery heating system, comprising: A battery (100) comprising a housing (110), a cell (120) and an electrolyte, the cell (120) being mounted within the housing (110), the cell (120) being immersed in the electrolyte, the electrolyte comprising fluorescently labeled lithium ions; The temperature monitoring device (200) is arranged on the diaphragm or the pole piece (130) of the battery cell (120) and is used for monitoring temperature information (T) of the electrolyte; A heating member (300) which is provided in a layered manner with the temperature monitoring device (200) and which heats the battery (100); A marker monitoring device (400) for monitoring concentration information (Q) of the fluorescent-labeled lithium ions on an interface of any one layer of the pole piece (130) of the battery cell (120); And the controller (500) is respectively connected with the temperature monitoring device (200), the marker monitoring device (400) and the heating piece (300) and is used for receiving the temperature information (T) and the concentration information (Q) and controlling the heating power (P) of the heating piece (300) according to the temperature information (T) and/or the concentration information (Q).
2. The battery heating system of claim 1, wherein the controller (500) is configured to: Acquiring a first temperature threshold (T1); if the temperature information (T) does not reach the first temperature threshold (T1), controlling the heating element (300) to heat the battery (100) with first power (P1); And if the temperature information (T) reaches the first temperature threshold (T1), controlling the heating element (300) to heat the battery (100) with second power (P2) according to the concentration information (Q), wherein the second power (P2) is smaller than or equal to the first power (P1).
3. The battery heating system according to claim 2, wherein when the temperature information (T) reaches the first temperature threshold (T1), the controller (500) is further configured to: Acquiring a first concentration threshold (Q1); If the concentration information (Q) does not reach the first concentration threshold value (Q1), controlling the heating element (300) to heat the battery (100) with a third power (P3); and if the concentration information (Q) reaches the first concentration threshold value (Q1), controlling the heating power (P) of the heating element (300) to be reduced from the third power (P3) to the heating element (300) to be closed.
4. A battery heating system according to claim 3, wherein the controller (500) is configured to: -acquiring a second temperature threshold (T2), wherein the first temperature threshold (T1) is smaller than the second temperature threshold (T2); And in the process of controlling the heating power (P) of the heating element (300) to be decreased, if the temperature information (T) reaches the second temperature threshold (T2) or the times of the temperature information (T) reaching the second temperature threshold (T2) reach the preset times, controlling the heating element (300) to be closed.
5. The battery heating system of claim 1, wherein the controller (500) is configured to: acquiring a second concentration threshold (Q2); If the concentration information (Q) does not reach the second concentration threshold value (Q2), controlling the heating element (300) to heat the battery (100) at a fourth power (P4); And if the concentration information (Q) reaches the second concentration threshold value (Q2), controlling the heating power (P) of the heating element (300) to be reduced from the fourth power (P4) to the heating element (300) to be closed.
6. The battery heating system of claim 5, wherein the controller (500) is configured to: acquiring a third temperature threshold (T3); And in the process of controlling the heating power (P) of the heating element (300) to be decreased, if the temperature information (T) reaches the third temperature threshold (T3) or the times of the temperature information (T) reaching the third temperature threshold (T3) reach the preset times, controlling the heating element (300) to be closed.
7. The battery heating system according to claim 3 or 5, characterized in that the heating power (P) is decreased to the heating element (300) off at a rate of decrease of ten percent per minute.
8. The battery heating system of claim 1, wherein the controller (500) is configured to: Acquiring a fourth temperature threshold (T4) and a third concentration threshold (Q3); If the temperature information (T) does not reach the fourth temperature threshold (T4), controlling the heating element (300) to heat the battery (100) with fifth power (P5); If the temperature information (T) reaches the fourth temperature threshold (T4) and the concentration information (Q) does not reach the third concentration information (Q), controlling the heating element (300) to heat the battery (100) with sixth power (P6); And if the temperature information (T) reaches the fourth temperature threshold value (T4) and the concentration information (Q) reaches the third concentration information (Q), controlling the heating power (P) of the heating element (300) to be reduced from the sixth power (P6) to the heating element (300) to be closed.
9. A battery heating method applied to a battery heating system, comprising the following steps: Acquiring temperature information (T) of an electrolyte of the battery (100) and concentration information (Q) of marked lithium ions in the electrolyte of the battery (100); And controlling the heating power (P) of a heating element (300) for heating the battery (100) according to the temperature information (T) and/or the concentration information (Q).
10. The battery heating method according to claim 9, comprising the steps of: Acquiring a first temperature threshold (T1); if the temperature information (T) does not reach the first temperature threshold (T1), controlling the heating element (300) to heat the battery (100) with first power (P1); And if the temperature information (T) reaches the first temperature threshold (T1), controlling the heating element (300) to heat the battery (100) with second power (P2) according to the concentration information (Q), wherein the second power (P2) is smaller than or equal to the first power (P1).
11. The battery heating method according to claim 10, characterized in that when the temperature information (T) reaches the first temperature threshold (T1), it further comprises the steps of: Acquiring a first concentration threshold (Q1); If the concentration information (Q) does not reach the first concentration threshold value (Q1), controlling the heating element (300) to heat the battery (100) with a third power (P3); and if the concentration information (Q) reaches the first concentration threshold value (Q1), controlling the heating power (P) of the heating element (300) to be reduced from the third power (P3) to the heating element (300) to be closed.
12. The battery heating method according to claim 11, characterized by further comprising the steps of, in controlling the decrease of the heating power (P) of the heating member (300): -acquiring a second temperature threshold (T2), wherein the first temperature threshold (T1) is smaller than the second temperature threshold (T2); And if the temperature information (T) reaches the second temperature threshold value (T2) or the times of the temperature information (T) reaching the second temperature threshold value (T2) reach the preset times, controlling the heating element (300) to be closed.
13. A storage medium, characterized in that the storage medium is a computer-readable storage medium, on which a battery heating program is stored, which when executed by a processor implements the battery heating method according to any one of claims 9 to 12.

Description

Battery heating system, battery heating method, and storage medium Technical Field The present application relates to the field of battery technologies, and in particular, to a battery heating system, a battery heating method, and a storage medium. Background The lithium ion battery has significantly reduced performance under low temperature conditions due to reduced migration rate of lithium ions and reduced chemical reaction rate, which directly results in increased internal resistance and reduced reversible capacity of the battery. The situation not only weakens the endurance mileage of the battery, but also can induce the growth of lithium dendrites, thereby bringing serious potential safety hazards. In the case of lithium ion batteries used in extremely cold regions, it is often necessary to additionally provide a heating device to maintain the normal operating temperature of the battery. However, in the related art, the operation of the heating device is generally controlled by detecting the ambient temperature through a temperature sensor. When the detected temperature is not accurate enough or the response of the heating device is not enough, the lithium ion battery can be insufficiently heated to weaken the performance of the lithium ion battery, and the battery can be damaged by excessive heating, even safety problems are caused. Therefore, it is difficult to ensure the reliability and safety of the lithium ion battery in a low temperature environment by the current heating method. Disclosure of Invention The embodiment of the application provides a battery heating system, a battery heating method and a storage medium, which improve the reliability of a lithium ion battery in a low-temperature environment so as to at least partially solve the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided a battery heating system comprising: the battery comprises a shell, a battery core and electrolyte, wherein the battery core is arranged in the shell, the battery core is immersed in the electrolyte, and the electrolyte comprises lithium ions marked by fluorescence; the temperature monitoring device is arranged on the diaphragm or the pole piece of the battery cell and is used for monitoring the temperature information of the electrolyte; The heating piece is arranged in a lamination way with the temperature monitoring device and is used for heating the battery; the marker monitoring device is used for monitoring concentration information of the fluorescent-labeled lithium ions on the interface of any layer of the pole piece of the battery cell; And the controller is respectively connected with the temperature monitoring device, the marker monitoring device and the heating piece and is used for receiving the temperature information and the concentration information and controlling the heating power of the heating piece according to the temperature information and/or the concentration information. Optionally, the controller is configured to: Acquiring a first temperature threshold; if the temperature information does not reach the first temperature threshold, controlling the heating element to heat the battery with first power; And if the temperature information reaches the first temperature threshold, controlling the heating element to heat the battery with second power according to the concentration information, wherein the second power is smaller than or equal to the first power. Optionally, when the temperature information reaches the first temperature threshold, the controller is further configured to: acquiring a first concentration threshold; if the concentration information does not reach the first concentration threshold value, controlling the heating element to heat the battery with third power; And if the concentration information reaches the first concentration threshold value, controlling the heating power of the heating element to decrease from the third power to the closing of the heating element. Optionally, the controller is configured to: Acquiring a second temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold; and in the process of controlling the heating power of the heating element to decrease, if the temperature information reaches the second temperature threshold value or the frequency of the temperature information reaching the second temperature threshold value reaches the preset frequency, controlling the heating element to be closed. Optionally, the controller is configured to: acquiring a second concentration threshold; if the concentration information does not reach the second concentration threshold value, controlling the heating element to heat the battery with fourth power; and if the concentration information reaches the second concentration threshold value, controlling the heating power of the heating element to decrease from the fourth pow