Constant-temperature solid-state battery system
By coordinating the heating module and the battery management system, the temperature of the solid-state battery is adjusted in real time, which solves the problem of unstable performance of solid-state batteries and achieves better power output and wider application.
Patent Information
- Application Number
- CN202423295137.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Solid-state batteries suffer from unstable performance due to reduced current input/output capabilities at low temperatures and decreased power at room temperatures, limiting their application in vehicles and energy storage.
The system employs a heating module and a battery management system to monitor and control the temperature of the solid-state battery module in real time, keeping it within the optimal range. Temperature stability is achieved through charging, discharging, and power regulation.
This improves the power and input/output characteristics of solid-state batteries, broadens their application scenarios, and enhances their electrochemical performance and stability.
Smart Images
Figure CN223871543U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of solid-state batteries, and in particular to a constant-temperature solid-state battery system. BACKGROUND
[0002] In recent years, power batteries have promoted the rapid development of electric vehicles due to their long service life, no pollution, and low use cost. However, the energy density and safety problems of power batteries have seriously hindered the development of the industry. Solid-state batteries can well solve the safety problems of liquid-state batteries and achieve higher energy density applications. However, the input and output capabilities of low-temperature current and the normal-temperature power of solid-state batteries are greatly reduced due to the use of solid-state electrolytes. Moreover, due to temperature fluctuations, the performance of the battery cannot be stably input and output, resulting in performance that cannot be output on demand when the vehicle is in use, which will become a bottleneck in vehicle and energy storage applications.
[0003] Based on this, the present application provides a constant-temperature solid-state battery system, which keeps the temperature of the solid-state battery system within an optimal range, is beneficial to the better performance of the material activity of the battery, improves the power and input / output characteristics of the battery body, and enables the solid-state battery to have a wider application scenario. CONTENT OF THE UTILITY MODEL
[0004] The present application provides a constant-temperature solid-state battery system, which can keep the temperature of the solid-state battery system within an optimal range, is beneficial to the better performance of the material activity of the battery, improves the power and input / output characteristics of the battery body, and enables the solid-state battery to have a wider application scenario.
[0005] The present application provides a constant-temperature solid-state battery system, which includes: a solid-state battery module; at least one heating module connected to the solid-state battery module for increasing the temperature of the solid-state battery module; and a battery management system connected to the solid-state battery module and the at least one heating module, which monitors the working state of the solid-state battery module when working and controls the at least one heating module to increase the temperature of the solid-state battery module or controls the solid-state battery module to reduce power and thus reduce the temperature according to the working state of the solid-state battery module.
[0006] In some embodiments of the present application, the solid-state battery module, the heating module, and the battery management system are directly connected through a circuit.
[0007] In some embodiments of the present application, the heating module is configured to charge and discharge the solid-state battery module to increase the temperature.
[0008] In some embodiments of the present application, the heating module includes an energy storage structure configured to absorb and release the current of the solid-state battery module.
[0009] In some embodiments of this application, the energy storage structure includes an inductor and a capacitor connected in series, with the two ends of the inductor connected to the two stages of the solid-state battery module, and the two ends of the capacitor connected to the two stages of the solid-state battery module.
[0010] In some embodiments of this application, the at least one heating module is connected in parallel with the solid-state battery module when it is not in operation, and is connected in series with the solid-state battery module when it is in operation.
[0011] In some embodiments of this application, when there are multiple heating modules, the heating modules are connected in parallel.
[0012] In some embodiments of this application, the battery management system includes a monitoring module for monitoring the operating status of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one heating module.
[0013] In some embodiments of this application, the operating state of the solid-state battery module includes temperature.
[0014] In some embodiments of this application, the solid-state battery module includes one or more solid-state batteries connected in series, and the total voltage of the solid-state battery module is the same as the sum of the voltages of the individual solid-state batteries in the series connection.
[0015] The constant-temperature solid-state battery system described in this application, through the cooperation of the heating module and the battery management system, can keep the temperature of the solid-state battery system within an optimal range, which is conducive to the battery better exerting the activity of the materials, thereby improving the power and input / output characteristics of the battery body and enabling solid-state batteries to have a wider range of applications. Attached Figure Description
[0016] The following accompanying drawings describe in detail the exemplary embodiments disclosed in this application. The same reference numerals denote similar structures in several views of the drawings. Those skilled in the art will understand that these embodiments are non-limiting and exemplary, and the drawings are for illustrative purposes only and are not intended to limit the scope of this application. Other embodiments may similarly fulfill the inventive intent of this application. It should be understood that the drawings are not drawn to scale. Wherein:
[0017] Figure 1 and Figure 2 This is a schematic diagram of the isothermal solid-state battery system described in an embodiment of this application. Detailed Implementation
[0018] The following description provides specific application scenarios and requirements for this application, intended to enable those skilled in the art to make and use the content of this application. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this application. Therefore, this application is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.
[0019] The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings.
[0020] Figure 1 and Figure 2 This is a schematic diagram of the isothermal solid-state battery system described in an embodiment of this application.
[0021] This application provides a constant-temperature solid-state battery system 100, with reference to... Figure 1 and Figure 2 As shown, the constant-temperature solid-state battery system 100 includes: a solid-state battery module; at least one heating module connected to the solid-state battery module for raising the temperature of the solid-state battery module; and a battery management system (BMS) connected to the solid-state battery module and the at least one heating module. When the battery management system is working, it monitors the working status of the solid-state battery module and controls the at least one heating module to raise the temperature of the solid-state battery module or controls the solid-state battery module to reduce its power to lower the temperature based on the working status of the solid-state battery module.
[0022] In some embodiments of this application, the solid-state battery module includes one or more solid-state batteries, which may be connected in series or in parallel. The total voltage of the solid-state battery module is the sum of the voltages of the individual solid-state batteries in the series connection.
[0023] In some embodiments of this application, the solid-state battery module includes, but is not limited to, on-board power batteries for new energy vehicles, energy storage batteries, and aerospace power batteries. Besides solid-state battery modules, the technical solutions of this application can also be applied to other electrochemical energy storage battery systems such as liquid lithium-ion battery systems, semi-solid-state lithium-ion battery systems, all-solid-state lithium-ion battery systems, and sodium-ion battery systems.
[0024] In some embodiments of this application, the number of heating modules may be one (see reference). Figure 1 ) or more (references) Figure 2 In some embodiments of this application, reference is made to... Figure 2 As shown, when there are multiple heating modules, they are connected in parallel. Using multiple heating modules in parallel can reduce the risk of excessive current from a single heating module.
[0025] In some embodiments of this application, the multiple heating modules can operate individually or collaboratively. Specifically, the battery management system can control individual heating modules to operate independently or control multiple heating modules to operate collaboratively.
[0026] In some embodiments of this application, when the at least one heating module is not working, it is connected in parallel with the solid-state battery module and does not affect the normal operation of the solid-state battery module; when the at least one heating module is working, it is connected in series with the solid-state battery module (changing from a parallel structure to a series structure).
[0027] In some embodiments of this application, the heating module is configured to charge and discharge the solid-state battery module, thereby increasing its temperature. During the charging and discharging process, current flows through the solid-state battery module, causing its internal resistance to rise and thus increasing its temperature. The solid-state battery module can be repeatedly charged and discharged multiple times.
[0028] Specifically, in some embodiments of this application, the heating module includes an energy storage structure, which is configured to absorb and release the current from the solid-state battery module during charging and discharging. When the heating module is in operation, it is connected in series with the solid-state battery module to form a current loop, allowing current to circulate repeatedly between the heating module and the solid-state battery module.
[0029] In some embodiments of this application, the energy storage structure includes an inductor and a capacitor connected in series. The two ends of the inductor are respectively connected to the two terminals (positive and negative) of the solid-state battery module, and the two ends of the capacitor are also respectively connected to the two terminals (positive and negative) of the solid-state battery module. The main function of the capacitor and inductor is to adjust and select the frequency, thereby providing input and output to the solid-state battery module with appropriate current and frequency through the adjustment of the capacitor and inductor.
[0030] In some embodiments of this application, the battery management system includes a monitoring module for monitoring the operating status of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one heating module. The battery management system, the solid-state battery module, and the at least one heating module are integrated into the isothermal solid-state battery system and are directly connected to each other via circuitry. The monitoring module is, for example, a temperature sensor for sensing the temperature of the solid-state battery module.
[0031] In some embodiments of this application, the monitoring module collects the working status of the solid-state battery module in real time and feeds it back to the control module. The control module then determines whether it is necessary to control the heating module and the solid-state battery module based on the received working status.
[0032] In the technical solution of this application, the battery management system can monitor the operating status of the solid-state battery module in real time, and, based on the monitoring results, control at least one heating module to raise the temperature of the solid-state battery module or control the solid-state battery module to reduce power and thus lower the temperature, thereby maintaining the temperature of the solid-state battery module within a suitable temperature range. It should be noted that the "constant temperature" mentioned in this application does not represent an absolute constant temperature, but rather a relative constant temperature maintained within a small range. This small temperature range is generally higher than room temperature, and can be specifically set according to the optimal operating temperature of the solid-state battery module to provide the best working environment for the solid-state battery module and improve its electrochemical characteristics. In some embodiments, the temperature range is, for example, 40 degrees Celsius to 80 degrees Celsius.
[0033] In some embodiments of this application, the operating state of the solid-state battery module includes temperature.
[0034] In some embodiments of this application, when the temperature of the solid-state battery module is below a first temperature threshold, the battery management system controls at least one heating module to raise the temperature of the solid-state battery module; when the temperature of the solid-state battery module is above a second temperature threshold, the battery management system controls the solid-state battery module to reduce power, thereby lowering the temperature. The first temperature threshold is generally approximately the same as or slightly higher than the lower limit of the optimal operating temperature range of the solid-state battery module. For example, when the optimal operating temperature range of the solid-state battery module is 40 degrees Celsius to 80 degrees Celsius, the first temperature threshold can be set to 40 degrees Celsius, 41 degrees Celsius, 42 degrees Celsius, or 43 degrees Celsius, etc. This is because the heating module responds to the temperature rise of the solid-state battery module relatively quickly, and therefore can be activated only when the temperature approaches or reaches the lower limit of the optimal operating temperature range of the solid-state battery module. The second temperature threshold is generally lower than the upper limit of the optimal operating temperature range of the solid-state battery module. For example, when the optimal operating temperature range of the solid-state battery module is 40 to 80 degrees Celsius, the second temperature threshold can be set to 75, 72, 70, or 65 degrees Celsius. This is because the cooling response speed of the solid-state battery module after reducing power is relatively slow. Therefore, it is necessary to reduce the power of the solid-state battery module before reaching the upper limit of its optimal operating temperature range. This approach can better maintain the temperature of the solid-state battery module within the optimal range, ensuring that the temperature of the solid-state battery module never exceeds this range.
[0035] In embodiments of this application, the functions of the battery management system can be implemented through hardware devices. For example, the monitoring module of the battery management system has two output ports. When the temperature monitored by the monitoring module is lower than the first temperature threshold, a first electrical signal is output from the first output port. After receiving the first electrical signal, the control module of the battery management system controls at least one heating module to increase the temperature of the solid-state battery module. When the temperature monitored by the monitoring module is higher than the second temperature threshold, a second electrical signal is output from the second output port. After receiving the second electrical signal, the control module of the battery management system controls the solid-state battery module to reduce power, thereby reducing the temperature. That is, the control module does not need to perform logical judgment, but directly executes different controls based on different received electrical signals. The monitoring module also does not need logical judgment, but triggers different outputs based on different temperature thresholds.
[0036] Specifically, in some embodiments of this application, when the battery management system controls the heating module to heat the solid-state battery module, the temperature of the solid-state battery module rises at an average rate of 3 to 5 degrees Celsius per minute. The temperature of the solid-state battery module rises at a rate that is initially rapid and then slows down.
[0037] Specifically, in some embodiments of this application, when the battery management system controls the solid-state battery module to reduce power, the power of the solid-state battery module decreases at a uniform rate of 10% to 30%.
[0038] In some embodiments of this application, after the heating module is activated and the temperature of the solid-state battery module rises back to the midpoint of its optimal operating temperature range (e.g., 60 degrees Celsius), the heating module is turned off, and heating stops. Similarly, after the power of the solid-state battery module is reduced and the temperature of the solid-state battery module falls back to the midpoint of its optimal operating temperature range (e.g., 60 degrees Celsius), the reduction of the power of the solid-state battery module is stopped.
[0039] The isothermal solid-state battery system described in this application, through the cooperation of a heating module and a battery management system, can maintain the temperature of the solid-state battery system within an optimal range. This allows the battery to better utilize the activity of the materials, thereby improving the power and input / output characteristics of the battery itself and enabling solid-state batteries to have a wider range of applications. It also significantly improves the electrochemical performance and stability of solid-state battery modules, broadens the application range of high-energy-density solid-state batteries, and achieves wider market applications. The isothermal solid-state battery system of this application has a simple structure, high controllability, and low cost.
[0040] In summary, after reading this application, those skilled in the art will understand that the foregoing application content is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are all within the spirit and scope of the exemplary embodiments of this application.
[0041] It should be understood that the term "and / or" as used in this embodiment includes any or all combinations of one or more of the associated listed items. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element.
[0042] It should also be understood that the terms “comprising,” “containing,” “including,” or “comprise”, when used in this application, indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof.
[0043] It should also be understood that although the terms first, second, third, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, without departing from the teachings of this application, a first element in some embodiments may be referred to as a second element in other embodiments. The same reference numerals or the same reference signs denote the same elements throughout the specification.
[0044] Furthermore, this application specification describes exemplary embodiments by referring to idealized exemplary cross-sectional views and / or plan views and / or perspective views. Therefore, differences from the illustrated shapes are foreseeable due to factors such as manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in shape caused, for example, by manufacturing processes. Thus, the regions shown in the figures are substantially schematic, and their shapes are not intended to illustrate the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.
Claims
1. A constant-temperature solid-state battery system, characterized in that, include: Solid-state battery module; At least one heating module is connected to the solid-state battery module to increase the temperature of the solid-state battery module; A battery management system connects the solid-state battery module and the at least one heating module. When the battery management system is working, it monitors the working status of the solid-state battery module and controls the at least one heating module to increase the temperature of the solid-state battery module or controls the solid-state battery module to reduce power and thus reduce the temperature, based on the working status of the solid-state battery module.
2. The isothermal solid-state battery system as described in claim 1, characterized in that, The solid-state battery module, the heating module, and the battery management system are directly connected by a circuit.
3. The isothermal solid-state battery system as described in claim 1, characterized in that, The heating module is configured to charge and discharge the solid-state battery module to increase its temperature.
4. The isothermal solid-state battery system as described in claim 3, characterized in that, The heating module includes an energy storage structure configured to absorb and release current from the solid-state battery module.
5. The isothermal solid-state battery system as described in claim 4, characterized in that, The energy storage structure includes an inductor and a capacitor connected in series. The two ends of the inductor are respectively connected to the two stages of the solid-state battery module, and the two ends of the capacitor are respectively connected to the two stages of the solid-state battery module.
6. The isothermal solid-state battery system as described in claim 1, characterized in that, When the at least one heating module is not working, it is connected in parallel with the solid-state battery module; when the at least one heating module is working, it is connected in series with the solid-state battery module.
7. The isothermal solid-state battery system as described in claim 1, characterized in that, When there are multiple heating modules, they are connected in parallel.
8. The isothermal solid-state battery system as described in claim 1, characterized in that, The battery management system includes a monitoring module for monitoring the working status of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one heating module.
9. The isothermal solid-state battery system as described in claim 1, characterized in that, The solid-state battery module includes one or more solid-state batteries connected in series. The total voltage of the solid-state battery module is the same as the sum of the voltages of the individual solid-state batteries in the series connection.
10. The isothermal solid-state battery system as described in claim 1, characterized in that, The operating status of the solid-state battery module includes temperature.