New energy automobile retired battery heating device in low-temperature environment

Abstract

The utility model belongs to a low-temperature environment new energy automobile retired battery heating device in the technical field of energy automobile retired battery recycling. A plurality of battery pack bearing pieces (2) in an energy storage cabinet body (1) are arranged at intervals from top to bottom, a semiconductor heating module (3) is arranged on each battery pack bearing piece (2), a battery pack (4) is arranged on the upper portion of each semiconductor heating module (3), each semiconductor heating module (3) is divided into a plurality of heating areas (5), and a semiconductor heating wire (6) is arranged in each heating area (5). And each heating area (5) is provided with a plurality of temperature sensing elements (7). The low-temperature environment new energy automobile retired battery heating device is simple in structure, resource reutilization of retired batteries can be conveniently and reliably achieved, stability, reliability and practicability under the low-temperature environment condition are met, the battery performance of the retired batteries during reutilization and energy storage is improved, and the service life of the batteries is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of technology for the reuse of retired batteries from new energy vehicles, and more specifically, it relates to a heating device for retired batteries from new energy vehicles in low-temperature environments. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the number of retired batteries is increasing daily. How to effectively utilize these retired batteries has become a focus of industry attention. In low-temperature environments, the performance of new energy vehicle batteries is significantly affected, including capacity decay, reduced charging and discharging efficiency, and shortened battery life. Therefore, developing an energy storage technology that can efficiently utilize entire packs of retired new energy vehicle batteries in low-temperature environments is of significant practical importance. The shortcomings of existing technologies are: 1. Poor low-temperature performance: Existing technologies cannot effectively improve the performance of retired batteries in low-temperature environments. The internal resistance of the battery increases at low temperatures, leading to severe energy loss during charging and discharging, failing to meet actual usage requirements. 2. Lack of effective thermal management: Inadequate thermal management of the entire retired battery pack results in the inability to preheat the battery in a timely manner in low-temperature environments and maintain a suitable temperature range during battery operation, affecting battery stability and lifespan. 3. Low utilization efficiency: The utilization methods for entire retired battery packs are relatively simple, failing to fully explore their energy storage potential in low-temperature environments, resulting in resource waste.

[0003] Existing technology includes a method for controlling the reuse of retired battery packs, titled "Control Method for Whole Pack Reuse of Retired Battery Packs," with publication number CN117577977B. This method provides a control method for the whole pack reuse of retired battery packs, comprising the following steps: obtaining parameter information of the retired battery pack, including its capacity, internal resistance, and voltage; determining the consistency index of the retired battery pack based on the parameter information; determining the application requirements for the reuse of the retired battery pack, including voltage and current requirements; dividing the retired battery packs into two groups based on their consistency index being greater than or less than a set value; connecting retired battery packs with a consistency index less than the set value but meeting the application voltage requirements in series; and connecting retired battery packs with a consistency index greater than the set value and simultaneously meeting both current and voltage requirements in parallel; determining a reasonable and accurate index; and then integrating and reusing these battery packs, thereby improving the reuse rate of retired battery packs while ensuring the stability of the system in new application scenarios. However, this technology does not address the technical problems and solutions of this application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a heating device for retired new energy vehicle batteries in low-temperature environments that is simple in structure, can conveniently and reliably heat (preheat) retired batteries in low-temperature environments, ensure that retired batteries work in the optimal temperature environment, improve the performance of retired batteries when reused for energy storage, and extend the service life of batteries.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] This invention relates to a heating device for retired batteries of new energy vehicles in low-temperature environments. The energy storage cabinet contains multiple battery pack carriers, each of which is equipped with a semiconductor heating module. The semiconductor heating module is divided into multiple heating areas, and each heating area is equipped with two semiconductor heating lines, namely heating unit R and heating unit L. Heating unit R and heating unit L are arranged symmetrically. Heating unit R includes a bottom position and multiple protruding top positions, and heating unit R has a mountain-shaped structure. Heating unit L includes a bottom position and multiple protruding top positions, and heating unit L has an inverted mountain-shaped structure.

[0007] Each semiconductor heating module is connected to its corresponding control box.

[0008] The energy storage cabinet is provided with a first battery pack carrier, a second battery pack carrier, a third battery pack carrier, and a fourth battery pack carrier arranged from top to bottom. The first battery pack carrier is equipped with the first battery pack, the second battery pack carrier is equipped with the second battery pack, the third battery pack carrier is equipped with the third battery pack, and the fourth battery pack carrier is equipped with the fourth battery pack.

[0009] The heating area of ​​the semiconductor heating module includes a first heating area, a second heating area, a third heating area, and a fourth heating area.

[0010] A first semiconductor heating line is arranged in the first heating region, a second semiconductor heating line is arranged in the second heating region, a third semiconductor heating line is arranged in the third heating region, and a fourth semiconductor heating line is arranged in the fourth heating region.

[0011] A temperature sensing element is provided on the inner side of each top position of the heating unit R, a temperature sensing element is provided on the inner side of each top position of the heating unit L, and a temperature sensing element is provided between the bottom positions of the heating unit R and the bottom positions of the heating unit L.

[0012] The energy storage cabinet includes a bottom and top, sides, and a door. Each corner of the bottom and the corresponding corner of the top are connected by a vertical beam.

[0013] The working principle and beneficial effects of the technical solution adopted in this invention are as follows:

[0014] The low-temperature environment heating device for retired new energy vehicle batteries described in this invention features a storage cabinet with multiple battery pack carriers arranged at intervals from top to bottom. Multiple battery packs can be housed within the cabinet, enabling combined use of retired batteries and effectively increasing energy storage capacity. The multiple battery packs do not interfere with each other, and their placement within the cabinet provides protection, isolating them from the influence of the external low-temperature environment, while maintaining a controllable internal temperature. The core improvement of this invention is its focus on the use of retired batteries in low-temperature environments; therefore, the overall structure needs to possess heating functionality. To this end, each battery pack carrier is equipped with a semiconductor heating module, with a battery pack mounted on top of each module. Each semiconductor heating module is divided into multiple heating zones, each with two semiconductor heating lines, designated as heating unit R and heating unit L, covering a corresponding local area. Before using the retired battery in a low-temperature environment, if the internal temperature of the storage cabinet is below a set temperature, the retired battery is not activated to avoid damage caused by activating it in low-temperature conditions. Instead, the semiconductor heating modules are activated, with each module controlled and activated independently, thereby heating the battery packs on each carrier from the bottom. Attached Figure Description

[0015] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0016] Figure 1 This is a schematic diagram of the internal structure of the low-temperature environment new energy vehicle retired battery heating device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the arrangement structure of the semiconductor heating module in the low-temperature environment new energy vehicle retired battery heating device of the present invention;

[0018] Figure 3 This is a schematic diagram of the arrangement structure of the semiconductor heating module in the low-temperature environment new energy vehicle retired battery heating device of the present invention;

[0019] Figure 4 This is a schematic diagram of the arrangement structure of the semiconductor heating module in the low-temperature environment new energy vehicle retired battery heating device of the present invention;

[0020] The labels in the attached diagram are as follows: 1. Energy storage cabinet; 2. Battery pack carrier; 21. First battery pack carrier; 22. Second battery pack carrier; 23. Third battery pack carrier; 24. Fourth battery pack carrier; 3. Semiconductor heating module; 4. Battery pack; 41. First battery pack; 42. Second battery pack; 43. Third battery pack; 44. Fourth battery pack; 5. Heating area; 51. First heating area; 52. Second heating area; 53. Third heating area; 54. Fourth heating area; 6. Semiconductor heating wire; 61. First semiconductor heating wire; 62. Second semiconductor heating wire; 63. Third semiconductor heating wire; 64. Fourth semiconductor heating wire; 65. Heating unit R; 66. Heating unit L; 67. Bottom position; 68. Top position; 7. Temperature sensing element (temperature sensor); 9. Control box; 100. Cabinet bottom; 110. Cabinet top; 120. Cabinet side; 130. Cabinet door; 16. Cabinet vertical beam; 161. Upper connecting part; 162. Upper bending part; 171. Lower connecting part; 172. Lower bending part. Detailed Implementation

[0021] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0022] As attached Figure 1 - Appendix Figure 4As shown, this invention is a heating device for retired batteries of new energy vehicles in low-temperature environments. The energy storage cabinet 1 contains multiple battery pack carriers 2 arranged from top to bottom with gaps. Each battery pack carrier 2 is equipped with a semiconductor heating module 3, and each semiconductor heating module 3 has a battery pack 4 mounted on it. The semiconductor heating module 3 is divided into multiple heating zones 5, each with a semiconductor heating wire 6 and multiple temperature sensing elements 7. The temperature range of the low-temperature environment is between 0℃ and -40℃. This invention addresses the shortcomings of existing technologies by proposing an improved technical solution. In this structural design, the energy storage cabinet 1 serves as a enclosure for multiple retired batteries, reliably protecting them. The energy storage cabinet 1 contains multiple battery pack carriers 2 arranged from top to bottom with gaps, allowing for the placement of multiple battery packs 4, effectively increasing energy storage capacity without interference between them. The core improvement of this invention is for the use of retired batteries in low-temperature environments; therefore, the overall structure needs to have a heating function. To this end, each battery pack carrier 2 is equipped with a semiconductor heating module 3, and each semiconductor heating module 3 has a battery pack 4 mounted on it. The semiconductor heating module 3 is divided into multiple heating zones 5, and each heating zone 5 is equipped with a semiconductor heating wire 6. By using semiconductor heating wires 6 in each heating zone, the temperature of each zone is heated separately, ensuring that the retired battery can be heated quickly. Each heating zone 5 is equipped with multiple temperature sensing elements 7. These temperature sensing elements 7 reliably sense the actual temperature of the corresponding zone and feed it back to the control box. The control box, as the control unit, controls the heating of the semiconductor heating wires according to the actual temperature, ensuring that each heating zone 5 can quickly heat up to the appropriate operating temperature for the retired battery. During the operation of the retired battery, a set range of values ​​is set for the temperature sensing elements 7. The temperature sensing elements 7 monitor and feed back the actual temperature of the corresponding heating zone. When the actual temperature exceeds the set high temperature value, the control box 9 can stop heating; when the actual temperature is below the set low temperature value, the control box 9 can start heating. The high temperature value and the low temperature value are a range of values, which is the optimal operating temperature range for the retired battery. This reliably ensures that the retired battery operates within the optimal temperature range. The structure of this invention includes: 1. Low-temperature ambient temperature detection: (1) Temperature sensing unit (sensor arrangement): The temperature sensor can monitor the ambient temperature of the battery in real time and accurately. (2) Data transmission and processing: The sensor transmits the collected temperature data to the control box via wired or wireless means. The control box analyzes and processes the data to determine whether the current temperature is within the range suitable for battery operation. 2. Low-temperature preheating start-up function: (1) Heating element design: Specially designed heating elements are installed at the bottom of the battery pack, using a semiconductor heating device. These heating elements can generate enough heat in a short time to preheat the battery.(2) Intelligent control start-up: When the control box determines that the retired battery needs to be preheated based on the temperature detection data, it automatically starts the heating element. The heating process is carried out according to the preset temperature curve to ensure that the battery can be heated up quickly and evenly to the appropriate start-up temperature. 3. Battery thermal management technology: (1) Temperature equalization control: Temperature equalization control is achieved by monitoring the temperature of the heating area where the battery is located on each battery pack carrier 2. When it is found that the temperature of some areas is too high or too low, the working state of the heating element is adjusted to adjust the temperature of different heating areas, so that the temperature distribution of different positions of each battery pack carrier 2 is more uniform, thereby improving the performance and life of the battery. The structure of the present invention, 1. Improves battery performance: Through accurate low temperature environment temperature detection, efficient low temperature preheating start-up technology and battery thermal management technology, the capacity and charge and discharge efficiency of retired batteries in low temperature environment are effectively improved, and the overall performance of the battery is significantly improved. 2. Extends battery life: Through a stable and suitable temperature environment for battery operation, the loss of the battery caused by temperature fluctuations and extreme temperatures is reduced, the service life of retired batteries is extended, and the utilization rate of resources is improved. 3. Cost Reduction: By fully utilizing retired batteries, the idleness and waste of a large number of retired batteries are avoided, reducing energy storage costs and decreasing reliance on new batteries, which aligns with the concept of sustainable development. The low-temperature environment heating device for retired new energy vehicle batteries described in this invention has a simple structure, enabling convenient and reliable resource reuse of retired batteries. It meets the requirements of stable, reliable, and practical operation under low-temperature conditions, and improves battery performance during energy storage reuse, extending battery life.

[0023] Each semiconductor heating module 3 is connected to a corresponding control box 9, and the temperature sensing element 7 of each heating area 6 is connected to the control box 9 of the corresponding semiconductor heating module 3. In this structure, the control box 9 is used to receive temperature data fed back by the temperature sensing unit 7 and to control the start and stop of the semiconductor heating module 3, so that the battery can be used in an optimal temperature environment.

[0024] The energy storage cabinet 1 is internally arranged from top to bottom as follows: a first battery pack support 21, a second battery pack support 22, a third battery pack support 23, and a fourth battery pack support 24. A first battery pack 41 is mounted on the first battery pack support 21, a second battery pack 42 is mounted on the second battery pack support 22, a third battery pack 43 is mounted on the third battery pack support 23, and a fourth battery pack 44 is mounted on the fourth battery pack support 24. The semiconductor heating module 3 has a heating area 5 including a first heating area 51, a second heating area 52, a third heating area 53, and a fourth heating area 54. A first semiconductor heating wire 61 is mounted on the first heating area 51, a second semiconductor heating wire 62 is mounted on the second heating area 52, a third semiconductor heating wire 63 is mounted on the third heating area 53, and a fourth semiconductor heating wire 64 is mounted on the fourth heating area 54. Each heating region 5 is equipped with two semiconductor heating lines 6, namely heating unit R65 and heating unit L66, which are arranged symmetrically. Heating unit R65 includes a bottom position 67 and multiple protruding top positions 68, and has a mountain-shaped structure. Heating unit L66 includes a bottom position 67 and multiple protruding top positions 68, and has an inverted mountain-shaped structure. A temperature sensing element 7 is respectively installed inside each top position 67 of heating unit R65 and heating unit L66. When heating unit R65 detects temperature, the temperature sensing elements 7 inside the multiple top positions 67 obtain values, and then the average value is taken as the feedback temperature data. Similarly, when heating unit L66 detects temperature, the temperature sensing elements 7 inside the multiple top positions 67 obtain values, and then the average value is taken as the feedback temperature data. A temperature sensing element 7 is disposed between the bottom position 68 of heating unit R65 and the bottom position 68 of heating unit L66. The temperature sensing element is a temperature sensor. In this way, the temperature sensing element reliably obtains the actual temperature value of the bottom of the battery pack.

[0025] The energy storage cabinet 1 includes a bottom 100, a top 110, a side 120, and a door 130. Each corner of the bottom 100 and the corresponding corner of the top 110 are connected by a corresponding vertical beam 16. This structure forms a closed frame structure with the bottom 100, top 110, side 120, and door 130 housing retired batteries. When the cabinet door is closed, the interior of the energy storage cabinet is sealed, reliably protecting the retired batteries.

[0026] The battery pack 4 is connected to the battery pack carrier 2 via screws. The battery pack carrier 2 is connected to the connecting beam 15 via screws. The battery pack carrier 2 is connected to the cabinet vertical beam 16 via the connecting beam 15. In this structure, the battery pack is fixedly connected to the battery pack carrier 2, and the battery pack carrier 2 is fixedly connected to the cabinet vertical beam 16. The cabinet vertical beam connects the bottom 100 and the top 110 of the cabinet, thus fixing its own position and improving the overall strength of the energy storage cabinet.

[0027] The cabinet vertical beam 16 is equipped with an upper locking member and a lower locking member. The upper locking member includes an upper connecting part 161 and an upper bending part 162, which are C-shaped or V-shaped. The lower locking member includes a lower connecting part 171 and a lower bending part 172, which are also C-shaped or V-shaped. The upper connecting part 161 of the upper locking member and the cabinet vertical beam 16 form an acute angle, and the lower connecting part 171 of the lower locking member and the cabinet vertical beam 16 also form an acute angle. With this structure, when installing the connecting beam 15, the connecting beam 15 is pushed in between the upper and lower locking members. Then, when force is applied, the upper locking member moves upward and the lower locking member moves downward, causing the connecting beam to enter its position. After the external force disappears, the upper and lower locking members return to their original positions, reliably locking the connecting beam. This allows for convenient and reliable connection and disassembly of the connecting beams, ensuring reliable positioning during connection and effortless disassembly.

[0028] In a specific embodiment of the structure of the present invention, as shown in the accompanying drawings, the battery pack is arranged in four layers. Each layer of the battery pack is equipped with a semiconductor heating module, and each layer of the battery pack is provided with a single control box. Each layer of the semiconductor heating module is provided with four semiconductor heating wires, and each layer of the control box can independently control four semiconductor heating wires. Each semiconductor heating module is divided into a heating unit L and a heating unit R. Each semiconductor heating module is provided with seven temperature sensing areas, each with a temperature sensing unit, to precisely control the heating conduction of different battery packs.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A heating device for retired batteries of new energy vehicles in a low-temperature environment, characterized in that: The energy storage cabinet (1) is equipped with multiple battery pack carriers (2). Each battery pack carrier (2) is equipped with a semiconductor heating module (3). The semiconductor heating module (3) is divided into multiple heating areas (5). Each heating area (5) is equipped with two semiconductor heating wires (6), namely heating unit R (65) and heating unit L (66). Heating unit R (65) and heating unit L (66) are arranged symmetrically. Heating unit R (65) includes a bottom position (67) and multiple protruding top positions (68). Heating unit R (65) has a mountain-shaped structure. Heating unit L (66) includes a bottom position (67) and multiple protruding top positions (68). Heating unit L (66) has an inverted mountain-shaped structure.

2. The low-temperature environment new energy vehicle retired battery heating device according to claim 1, characterized in that: Each semiconductor heating module (3) is connected to its corresponding control box (9).

3. The low-temperature environment new energy vehicle retired battery heating device according to claim 1 or 2, characterized in that: The energy storage cabinet (1) is provided with a first battery pack support (21), a second battery pack support (22), a third battery pack support (23), and a fourth battery pack support (24) arranged from top to bottom inside.

4. The low-temperature environment new energy vehicle retired battery heating device according to claim 3, characterized in that: The first battery pack (41) is arranged on the first battery pack carrier (21), the second battery pack (42) is arranged on the second battery pack carrier (22), the third battery pack (43) is arranged on the third battery pack carrier (23), and the fourth battery pack (44) is arranged on the fourth battery pack carrier (24).

5. The low-temperature environment new energy vehicle retired battery heating device according to claim 1 or 2, characterized in that: The heating area (5) of the semiconductor heating module (3) includes a first heating area (51), a second heating area (52), a third heating area (53), and a fourth heating area (54).

6. The low-temperature environment new energy vehicle retired battery heating device according to claim 1 or 2, characterized in that: A first semiconductor heating line (61) is arranged on the first heating region (51), a second semiconductor heating line (62) is arranged on the second heating region (52), a third semiconductor heating line (63) is arranged on the third heating region (53), and a fourth semiconductor heating line (64) is arranged on the fourth heating region (54).

7. The low-temperature environment new energy vehicle retired battery heating device according to claim 6, characterized in that: A temperature sensing element (7) is provided inside each top position (67) of the heating unit R (65), and a temperature sensing element (7) is provided inside each top position (67) of the heating unit L (66).

8. The low-temperature environment new energy vehicle retired battery heating device according to claim 7, characterized in that: A temperature sensing element (7) is provided between the bottom position (68) of the heating unit R (65) and the bottom position (68) of the heating unit L (66).

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