Electric motorcycle battery with temperature control function

Abstract

The utility model provides an electric motorcycle battery with a temperature control function, which relates to the technical field of energy storage power supplies and comprises a metal shell, a battery pack, a vapor chamber, a BMS (battery management system) module and a temperature control module. The battery pack consists of a plurality of mutually stacked soft package lithium polymer battery cells and is arranged in the metal shell. The vapor chamber is thermally coupled with the battery pack. The temperature control module comprises a semiconductor chilling plate, a bidirectional TEC driving controller, an independent power supply, a temperature sensor and a TEC charging interface. And one side of the semiconductor chilling plate is thermally coupled with the vapor chamber, and the other side is thermally coupled with the metal shell to realize bidirectional temperature regulation. The bidirectional TEC driving controller communicates with the BMS module, and controls the current direction and magnitude of the semiconductor chilling plate according to the battery pack temperature monitored by the temperature sensor, so that the battery temperature is adjusted to a suitable working temperature within a short time after the battery pack starts to work; and the problems generated when the lithium ion battery works in an extreme temperature environment are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage power technology, and in particular to an electric motorcycle battery with temperature control. Background Technology

[0002] Electric motorcycles have seen rapid development in recent years due to their environmental friendliness and energy efficiency. As a core component of electric motorcycles, the performance of the power battery directly affects the motorcycle's range, power performance, and safety. Currently, lithium-ion batteries, especially soft-pack lithium polymer cells, are commonly used in electric motorcycles due to their high energy density, light weight, and good shape flexibility.

[0003] However, the performance of lithium-ion batteries is significantly affected by temperature. At high temperatures, the capacity of lithium-ion batteries decreases, internal resistance increases, lifespan is shortened, and thermal runaway may even occur, leading to safety accidents. At low temperatures, the activity of lithium-ion batteries decreases, and charge / discharge performance deteriorates, resulting in difficulty starting electric motorcycles and a reduced driving range.

[0004] To address the temperature issues of lithium-ion batteries, thermal management is necessary. Traditional battery thermal management methods primarily rely on passive heat dissipation, such as natural convection, adding heat sinks, or using thermally conductive materials to dissipate the heat generated by the battery. These methods are simple in structure and low in cost, but they often fail to meet heat dissipation requirements under extreme temperature conditions or high-power applications. More importantly, these passive heat dissipation methods can only dissipate heat, not generate heat, and cannot solve the problem of battery performance degradation in low-temperature environments.

[0005] Therefore, it is necessary to improve existing electric motorcycle batteries to overcome the shortcomings of the current technology. Utility Model Content

[0006] To overcome the problems existing in related technologies, the purpose of this utility model is to provide an electric motorcycle battery with temperature control. By adopting active temperature control technology, the battery pack is heated and cooled using a semiconductor cooling chip, and the heat dissipation plate is combined to improve the heat conduction efficiency. Precise temperature control is achieved through an independent power supply and a bidirectional TEC drive controller. This overcomes the problems of shortened battery life and reduced safety in high-temperature environments, as well as performance degradation and shortened range in low-temperature environments, which exist in the prior art. In this way, the performance, safety and reliability of electric motorcycles under different temperature environments are improved.

[0007] An electric motorcycle battery with temperature control, comprising:

[0008] Metal casing;

[0009] The battery pack, housed within the metal casing, comprises a plurality of stacked soft-pack lithium polymer cells.

[0010] A heat spreader is disposed on the battery pack, and a first surface of the heat spreader is thermally coupled to at least one surface of the battery pack.

[0011] The BMS module, located inside the metal casing, is used to monitor and manage the status of the battery pack.

[0012] The temperature control module, located within the metal casing, includes:

[0013] A semiconductor refrigeration chip, wherein a first surface of the semiconductor refrigeration chip is thermally coupled to a second surface of the heat spreader, and the second surface of the semiconductor refrigeration chip is thermally coupled to an inner surface of the metal casing;

[0014] A bidirectional TEC drive controller, which is communicatively connected to the BMS module, is used to control the direction and magnitude of the current flowing through the thermoelectric cooler.

[0015] The power supply is electrically connected to the bidirectional TEC drive controller and electrically isolated from the drive battery of the electric motorcycle.

[0016] At least one temperature sensor is disposed on the battery pack and / or the heat spreader and electrically connected to the bidirectional TEC drive controller for monitoring the temperature of the battery pack;

[0017] The TEC charging interface is located on the metal casing and is electrically connected to the power supply for charging the power supply.

[0018] By integrating components such as a heat spreader, semiconductor cooling chip, bidirectional TEC drive controller, independent power supply, and temperature sensor into the electric motorcycle battery, active temperature control of the battery pack is achieved. Heat exchange is facilitated through a metal casing, resulting in a compact overall structure. This solves the performance degradation problem of traditional electric motorcycle batteries under high and low temperature environments, improving battery safety, reliability, and extending battery life.

[0019] Furthermore, the first surface of the semiconductor cooling chip is disposed in the central region of the heat spreader.

[0020] By placing the first surface of the semiconductor cooling chip in the central region of the heat spreader, uniform heating or cooling of the heat spreader can be achieved, thereby improving the uniformity of the overall temperature control of the battery pack, avoiding excessive local temperature differences, and further improving battery performance and lifespan.

[0021] Furthermore, the power supply is a lithium-ion battery pack or a lithium polymer battery pack.

[0022] Using lithium-ion or lithium-polymer battery packs as the power supply for the temperature control module can provide higher energy density, thus enabling a longer operating time for the temperature control system within the same volume. Simultaneously, lithium-ion or lithium-polymer battery packs exhibit excellent charge-discharge performance, meeting the operational requirements of the temperature control system.

[0023] Furthermore, the charging interface is a USB Type-C interface.

[0024] Using a USB Type-C interface as the charging port for the TEC power supply provides better versatility and compatibility, allowing users to easily charge their devices with standard USB-C chargers. At the same time, the USB-C interface also boasts strong power transmission capabilities, meeting the charging needs of independent power sources.

[0025] Furthermore, the material of the heat spreader is copper or aluminum.

[0026] Using copper or aluminum as the material for the heat spreader allows for rapid heat transfer from the battery pack, leveraging their high thermal conductivity to improve temperature control efficiency, reduce internal temperature differences, and enhance the stability and consistency of the battery pack.

[0027] Furthermore, thermally conductive interface material is filled between the heat spreader and the thermoelectric cooler, as well as between the thermoelectric cooler and the metal casing.

[0028] By filling the space between the heat spreader and the TEC, and between the TEC and the metal casing with thermally conductive interface material, the contact thermal resistance can be reduced, the heat transfer efficiency can be improved, and the cooling / heating effect of the TEC can be applied to the battery pack quickly and effectively, thereby improving the efficiency and response speed of the temperature control system.

[0029] Furthermore, the bidirectional TEC drive controller includes:

[0030] MCU is used to run control algorithms and output control signals;

[0031] A voltage controller, the input terminal of which is electrically connected to the power supply and the output terminal of which is electrically connected to the thermoelectric cooler, the voltage controller adjusts the output voltage according to the control signal of the MCU, thereby controlling the direction and magnitude of the current flowing through the thermoelectric cooler;

[0032] A signal conditioning circuit, connected to the temperature sensor and the MCU, is used to convert the analog signal collected by the temperature sensor into a digital signal;

[0033] A communication interface circuit connects the MCU and the BMS module, and is used for communication between the bidirectional TEC drive controller and the BMS module;

[0034] A current detection amplifier circuit is connected to the current loop of the thermoelectric cooler to detect the current flowing through the thermoelectric cooler.

[0035] The power supply circuit is connected to the power supply and provides power to the MCU, voltage controller, signal conditioning circuit, communication interface circuit and current detection and amplification circuit.

[0036] By employing a structure comprising an MCU, voltage controller, signal conditioning circuit, communication interface circuit, current detection and amplification circuit, and power supply circuit, precise control and management of the TEC current can be achieved, ensuring the reliable and stable operation of the entire temperature control system. The MCU's control algorithm enables the system to possess intelligent temperature control capabilities.

[0037] Furthermore, it also includes a protective frame, which includes protective plates on both sides in the stacking direction of the battery pack and a fixing bracket located on the terminal side of the battery pack. One end of the fixing bracket is fixedly connected to the metal shell, and the other end is fixedly connected to one of the protective plates, while the other protective plate is fixedly connected to the metal shell.

[0038] A gap is left between the fixed bracket and the battery pack, and the BMS module, bidirectional TEC drive controller and power supply are fixed on the side of the fixed bracket away from the battery pack.

[0039] Adding a protective frame enhances the mechanical strength and shock resistance of the battery pack, better protecting the battery pack and its internal components. Simultaneously, by fixing the BMS module, bidirectional TEC drive controller, and power supply to the side of the mounting bracket away from the battery pack, direct contact between these electronic components and the battery pack is avoided, improving system safety. Furthermore, the spacing between these components prevents the effects of battery pack deformation on these parts, enhancing system reliability.

[0040] Furthermore, the metal casing is in the shape of a parallelogram prism, and the height direction of the parallelogram prism is the same as the height direction of the battery pack. The metal casing is also provided with an input interface, an output interface, and a display screen, which are located on different surfaces of the metal casing.

[0041] Designing the metal casing as a parallelogram prism allows for more efficient use of space and adapts to the installation requirements of electric motorcycles. It facilitates the installation of input / output interfaces and displays while increasing space utilization.

[0042] Furthermore, the metal casing is also provided with two handles and two locking blocks, which are respectively located on different surfaces of the metal casing.

[0043] By incorporating handles and locking mechanisms into the metal casing, the battery pack can be easily moved and installed, improving the efficiency of disassembly and replacement. The different placements of these mechanisms facilitate handling under force from various directions.

[0044] The beneficial effects of this utility model are as follows:

[0045] This invention provides an electric motorcycle battery with temperature control. By employing active temperature control technology, it utilizes a semiconductor cooling chip to achieve bidirectional temperature regulation of the battery pack. Combined with the excellent thermal conductivity of the heat spreader and an independent power supply, and through communication between the bidirectional TEC drive controller and the BMS module, as well as a temperature sensor, it can adjust the battery temperature to a suitable operating temperature within a short time after the battery pack starts working. This effectively solves the problems of performance degradation, safety hazards, and shortened lifespan of lithium-ion batteries under extreme temperature environments. It significantly improves the safety, reliability, environmental adaptability, and lifespan of electric motorcycle batteries under various operating conditions, while avoiding the impact of the temperature control module on the electric motorcycle's range. Attached Figure Description

[0046] Figure 1 This is an isometric schematic diagram of the electric motorcycle battery with temperature control provided in Embodiment 1 of this application;

[0047] Figure 2 This is another isometric schematic diagram of the electric motorcycle battery with temperature control provided in Embodiment 1 of this application;

[0048] Figure 3 This is a schematic diagram of the interior of one side of the casing after removing one side of the metal outer shell, as provided in Embodiment 1 of this application;

[0049] Figure 4 yes Figure 3 AA cross-section view;

[0050] Figure 5 This is a schematic diagram of the metal casing after it has been made transparent, as provided in Embodiment 1 of this application.

[0051] Figure 6 This is a connection diagram of the BMS module and the temperature control module provided in Embodiment 1 of this application.

[0052] Figure label:

[0053] 100. Metal casing; 110. Handle; 120. Locking block;

[0054] 200. Battery pack;

[0055] 300, heat spreader;

[0056] 400, BMS module;

[0057] 500. Temperature control module; 510. Semiconductor cooling chip; 520. Bidirectional TEC drive controller; 521. MCU; 522. Voltage controller; 523. Signal conditioning circuit; 524. Communication interface circuit; 525. Current detection and amplification circuit; 526. Power supply circuit; 530. Power supply; 540. Temperature sensor; 550. TEC charging interface;

[0058] 600. Protective frame; 610. Protective plate; 620. Fixing bracket. Detailed Implementation

[0059] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0060] Example 1

[0061] like Figures 1-6 As shown, this embodiment provides an electric motorcycle battery with temperature control, including a metal casing 100, a battery pack 200, a heat spreader 300, a BMS module 400, a temperature control module 500, at least one temperature sensor 540, and a TEC charging interface 550.

[0062] The metal casing 100 is made of metal, possessing good thermal conductivity and mechanical strength. In this embodiment, the metal casing 100 is a parallelogram prism, with its height aligned with that of the battery pack 200. The metal casing 100 also includes an input interface, an output interface, and a display screen, used for charging, discharging, and displaying information about the battery, respectively. The input interface, output interface, and display screen are located on different surfaces of the metal casing 100 for user convenience. Furthermore, the metal casing 100 is equipped with two handles 110 and two locking blocks 120 for easy battery handling and installation. The two handles 110 are located on the top and bottom surfaces of the metal casing 100, facilitating force application from different directions. The two locking blocks 120 are located on the sides of the metal casing 100 for securing the battery to the electric motorcycle. The interior of the metal casing 100 forms a receiving space to accommodate components such as the battery pack 200, the heat spreader 300, the BMS module 400, and the temperature control module 500. The inner surface of the metal casing 100 is thermally coupled to the second surface of the semiconductor cooling chip 510, which can transfer the heat or cold generated by the semiconductor cooling chip 510 to the external environment.

[0063] Battery pack 200: Contained within a metal casing 100, it consists of several stacked pouch lithium polymer cells. In this embodiment, the battery pack 200 uses multiple pouch lithium polymer cells with a rated voltage of 3.7V connected in series, resulting in a rated voltage of 37V. The stacking direction of the cells is as follows: Figure 2 The up and down directions are shown in the diagram.

[0064] Heat spreader 300: Made of a metal plate with high thermal conductivity, it is mounted on the battery pack 200. Its first surface is in close contact with the upper surface of the battery pack 200 and is thermally coupled through thermally conductive silicone grease. The second surface of the heat spreader 300 is thermally coupled to the first surface of the semiconductor cooling chip 510.

[0065] The BMS module 400 is located inside the metal casing 100 and is used to monitor and manage the status of the battery pack 200, including voltage, current, temperature, SOC, SOH, etc.

[0066] The temperature control module 500 is housed within the metal casing 100 and includes a semiconductor cooling chip 510, a bidirectional TEC drive controller 520, and a power supply 530 for the temperature control module 500.

[0067] The first surface of the thermoelectric cooler 510 is attached to the central region of the second surface of the heat spreader 300 and thermally coupled via thermal grease. The second surface of the TEC is attached to the inner surface of the metal housing 100 and thermally coupled via thermal grease.

[0068] The bidirectional TEC drive controller 520 includes an MCU 521, a voltage controller 522, a signal conditioning circuit 523, a communication interface circuit 524, a current sensing amplifier, and a power supply circuit 526.

[0069] The MCU521 is a microcontroller responsible for running the PID control algorithm and calculating the output power of the thermoelectric cooler 510 based on the data from the temperature sensor 540 and the BMS module 400, and generating a PWM control signal.

[0070] Voltage controller 522: Employs a buck / boost controller chip. Its input is electrically connected to the power supply 530 of the temperature control module 500, and its output is electrically connected to the thermoelectric cooler 510. Voltage controller 522 adjusts the output voltage according to the PWM control signal output by MCU 521, thereby controlling the direction and magnitude of the current flowing through the thermoelectric cooler 510.

[0071] The signal conditioning circuit 523 uses an operational amplifier and an analog-to-digital converter to amplify the analog signal collected by the temperature sensor 540 and convert it into a digital signal for the MCU 521 to read.

[0072] The communication interface circuit 524 uses a CAN transceiver to realize CAN bus communication between MCU521 and BMS module 400.

[0073] The current sensing amplifier is connected to the current loop of the thermoelectric cooler 510 to detect the current flowing through the thermoelectric cooler 510 and feed the current signal back to the MCU521.

[0074] The power supply circuit 526 uses a step-down converter and a linear regulator to convert the voltage of the power supply 530 for the temperature control module 500 into the operating voltage required by the MCU 521, voltage controller 522, signal conditioning circuit 523, communication interface circuit 524, and current sensing amplifier.

[0075] The power supply 530 for the temperature control module 500 uses a battery pack 200 composed of multiple lithium-ion batteries connected in series. This power supply provides power to all circuits and the TEC in the temperature control module 500.

[0076] Temperature sensor 540 uses thermistors, and multiple thermistors are set. Some of them are attached to the upper surface of battery pack 200 to monitor the surface temperature of battery pack 200; the others are attached to heat spreader 300 to monitor the temperature of heat spreader 300.

[0077] The TEC charging interface 550 uses a universal serial bus interface, located on the metal casing 100, and is connected to the power supply 530 of the temperature control module 500 for charging the power supply 530 of the temperature control module 500. The charging management circuit uses a dedicated charging management chip to implement CC / CV charging mode.

[0078] The protective frame 600 includes protective plates 610 on both sides of the battery pack 200 in the stacking direction, and a fixing bracket 620 located on the terminal side of the battery pack 200. Both the protective plates 610 and the fixing bracket 620 are made of high-strength engineering plastic. One end of the fixing bracket 620 is fixedly connected to the metal casing 100 with screws, and the other end is fixedly connected to one of the protective plates 610 with screws. The other protective plate 610 is fixedly connected to the metal casing 100 with screws. A certain gap exists between the fixing bracket 620 and the battery pack 200. The power supply 530 for the BMS module 400, the bidirectional TEC drive controller 520, and the temperature control module 500 is fixed to the side of the fixing bracket 620 away from the battery pack 200.

[0079] Working principle:

[0080] When the electric motorcycle starts, the BMS module 400 sends the status information (voltage, current, SOC, SOH, etc.) of the battery pack 200 to the MCU 521 of the bidirectional TEC drive controller 520 via the CAN bus. Simultaneously, the MCU 521 reads the temperature data collected by the temperature sensor 540 and calculates the target output power of the TEC according to a preset PID control algorithm. Then, the MCU 521 outputs a PWM control signal to the voltage controller 522, adjusting the magnitude and polarity of its output voltage to control the direction and magnitude of the current flowing through the thermoelectric cooler 510. When cooling is required, the voltage controller 522 operates in buck mode, with current flowing from the first surface to the second surface of the thermoelectric cooler 510, lowering the temperature of the first surface (connected to the heat spreader 300) and thus cooling the battery pack 200. When heating is required, the voltage controller 522 operates in boost mode, with current flowing from the second surface to the first surface of the TEC, raising the temperature of the first surface and thus heating the battery pack 200.

[0081] Further:

[0082] Thermally conductive silicone grease is filled between the heat spreader 300 and the thermoelectric cooler 510, and between the thermoelectric cooler 510 and the metal casing 100, to reduce contact thermal resistance. Heat dissipation fins are provided on the metal casing 100 to enhance heat dissipation. Drain holes are provided on the metal casing 100 for draining condensate.

[0083] Control strategy:

[0084] The PID control algorithm running in the MCU521 controls the operation of the TEC according to the following logic:

[0085] When the ambient temperature is lower than the set threshold and the battery pack 200 temperature is lower than the set threshold, the heating mode is activated to heat the battery pack 200 temperature to above the set value.

[0086] When the ambient temperature is higher than the set threshold and the battery pack 200 temperature is higher than the set threshold, the cooling mode is activated to control the battery pack 200 temperature to around the set value.

[0087] When the temperature of the battery pack 200 is within the set range, the temperature control module 500 stops working.

[0088] When the temperature of the battery pack 200 exceeds the set threshold, the BMS module 400 will cut off the output of the battery pack 200, and at the same time the temperature control module 500 will cool down at full capacity to prevent the battery pack 200 from thermal runaway.

[0089] The electric motorcycle battery with temperature control provided in this embodiment uses a thermoelectric cooler 510 (TEC) for active bidirectional temperature control of the battery pack 200. Combined with the rapid heat conduction of the heat spreader 300 and the precise monitoring of multiple temperature sensors 540, uniform, rapid, and precise temperature control of the battery pack 200 is achieved. Utilizing a PID control algorithm and a bidirectional TEC drive controller 520, the operating state of the TEC can be dynamically adjusted based on the battery pack 200 temperature and the status information provided by the BMS module 400, ensuring that the battery pack 200 always operates within its optimal temperature range. Furthermore, the independent temperature control module 500 power supply 530 avoids impacting the range of the electric motorcycle's main battery. This solution effectively solves the risk of thermal runaway in high-temperature environments and the performance degradation problem in low-temperature environments, significantly improving the safety, reliability, and cycle life of the battery pack 200, and enhancing the adaptability and stability of the electric motorcycle under different ambient temperatures. By setting up multiple temperature sensors 540, more comprehensive monitoring of the battery pack 200 temperature is achieved, improving the accuracy and reliability of temperature control. The use of CAN bus communication ensures the stability and real-time performance of data transmission.

[0090] Example 2

[0091] like Figures 1-6 As shown, this embodiment provides an electric motorcycle battery with temperature control, including a metal casing 100, a battery pack 200, a heat spreader 300, a BMS module 400, a temperature control module 500, a temperature sensor 540, and a TEC charging interface 550.

[0092] The metal casing 100 is made of aluminum alloy, which has good thermal conductivity and mechanical strength. In this embodiment, the metal casing 100 is rectangular, with its height aligned with that of the battery pack 200. The metal casing 100 also includes an input interface, an output interface, and a display screen, used for charging, discharging, and displaying information about the battery, respectively. The input interface, output interface, and display screen are located on different surfaces of the metal casing 100 for user convenience. Furthermore, the metal casing 100 is equipped with two handles 110 and two clips for easy battery handling and installation. The two handles 110 are located on the sides of the metal casing 100 to facilitate force application from different directions. The two clips are located on the bottom surface of the metal casing 100 to secure the battery to the electric motorcycle. The interior of the metal casing 100 forms a receiving space to accommodate components such as the battery pack 200, the heat spreader 300, the BMS module 400, and the temperature control module 500. The inner surface of the metal casing 100 is thermally coupled to the second surface of the semiconductor refrigeration chip 510, which can transfer the heat or cold generated by the TEC to the external environment.

[0093] The battery pack 200 is housed within a metal casing 100 and consists of several stacked pouch lithium polymer cells. In this embodiment, the battery pack 200 is composed of multiple 3.7V pouch lithium polymer cells connected in series, with a rated voltage of 48V.

[0094] The heat spreader 300 is made of aluminum plate and is mounted on the battery pack 200. Its first surface is in close contact with the upper surface of the battery pack 200 and is thermally coupled through a thermally conductive pad with a high thermal conductivity. The second surface of the heat spreader 300 is thermally coupled to the first surface of the semiconductor cooling chip 510.

[0095] The BMS module 400 is located inside the metal casing 100 and is used to monitor and manage the status of the battery pack 200, including voltage, current, temperature, SOC, SOH, etc.

[0096] The temperature control module 500 is housed within the metal casing 100 and includes a semiconductor cooling chip 510, a bidirectional TEC drive controller 520, and a power supply 530 for the temperature control module 500.

[0097] The first surface of the thermoelectric cooler 510 is attached to the central region of the second surface of the heat spreader 300 and thermally coupled through a thermally conductive pad with a high thermal conductivity. The second surface of the TEC is attached to the inner surface of the metal housing 100 and thermally coupled through thermal grease.

[0098] The bidirectional TEC drive controller 520 includes an MCU 521, a voltage controller 522, a signal conditioning circuit 523, a communication interface circuit 524, a current sensing amplifier, and a power supply circuit 526.

[0099] The MCU521 is a single-chip microcomputer responsible for running the PID control algorithm and calculating the output power of the TEC based on the data from the temperature sensor 540 and the BMS module 400, and generating a PWM control signal.

[0100] The voltage controller 522 uses a synchronous buck / boost controller chip with an integrated H-bridge. Its input is electrically connected to the power supply 530 of the temperature control module 500, and its output is electrically connected to the thermoelectric cooler 510. The voltage controller 522 adjusts the output voltage according to the PWM control signal output by the MCU 521, thereby controlling the direction and magnitude of the current flowing through the thermoelectric cooler 510.

[0101] The signal conditioning circuit 523 amplifies the analog signal collected by the temperature sensor 540 and converts it into a digital signal for the MCU 521 to read.

[0102] The communication interface circuit 524 uses a serial transceiver to realize UART communication between MCU521 and BMS module 400.

[0103] The current sensing amplifier is connected to the current loop of the thermoelectric cooler 510 to detect the current flowing through the thermoelectric cooler 510 and feed the current signal back to the MCU 521.

[0104] The power supply circuit 526 uses a DC-DC step-down converter to convert the voltage of the power supply 530 to the operating voltage required by the MCU 521, voltage controller 522, signal conditioning circuit 523, communication interface circuit 524, and current sensing amplifier.

[0105] The power supply 530 for the temperature control module 500 uses a battery pack 200 composed of multiple lithium-ion batteries connected in series. This power supply provides power to all circuits and the semiconductor cooling chip 510 in the temperature control module 500.

[0106] Temperature sensor 540: A single high-precision NTC thermistor is placed on the surface of the cell at the center of the battery pack 200 to monitor the temperature of the battery pack 200.

[0107] TEC charging interface 550: A standard DC socket is mounted on the metal casing 100 and connected to the power supply 530 of the temperature control module 500 for charging the power supply 530. The charging management circuit uses a dedicated charging management chip to implement CC / CV charging mode.

[0108] The protective frame 600 includes protective plates 610 located on both sides of the battery pack 200 in the stacking direction, and a fixing bracket 620 located on the terminal side of the battery pack 200. Both the protective plates 610 and the fixing bracket 620 are made of high-strength engineering plastic. One end of the fixing bracket 620 is fixedly connected to the metal casing 100 with screws, and the other end is fixedly connected to one of the protective plates 610 with screws. The other protective plate 610 is fixedly connected to the metal casing 100 with screws. A certain gap exists between the fixing bracket 620 and the battery pack 200. The power supply 530 for the BMS module 400, the bidirectional TEC drive controller 520, and the temperature control module 500 is fixed to the side of the fixing bracket 620 away from the battery pack 200.

[0109] Working principle:

[0110] When the electric motorcycle starts, the BMS module 400 sends the status information (voltage, current, SOC, SOH, etc.) of the battery pack 200 to the MCU 521 of the bidirectional TEC drive controller 520 via the UART bus. Simultaneously, the MCU 521 reads the temperature data of the battery pack 200 collected by the temperature sensor 540 and calculates the target output power of the thermoelectric cooler 510 according to a preset PID control algorithm. Then, the MCU 521 outputs a PWM control signal to the voltage controller 522, adjusting the magnitude and polarity of its output voltage to control the direction and magnitude of the current flowing through the thermoelectric cooler 510. When cooling is required, the voltage controller 522 operates in buck mode, with current flowing from the first surface of the thermoelectric cooler 510 to the second surface, lowering the temperature of the first surface (connected to the heat spreader 300) and thus cooling the battery pack 200. When heating is required, the voltage controller 522 operates in boost mode, with current flowing from the second surface of the TEC to the first surface, raising the temperature of the first surface and thus heating the battery pack 200.

[0111] Further:

[0112] Thermal grease is filled between the heat spreader 300 and the thermoelectric cooler 510, and between the thermoelectric cooler 510 and the metal casing 100, to reduce contact thermal resistance.

[0113] The metal casing 100 is equipped with heat dissipation fins to enhance heat dissipation.

[0114] The metal casing 100 is provided with a drain hole for draining condensate.

[0115] In this embodiment, the metal casing 100 also serves as a heat sink, dissipating heat through natural convection.

[0116] Control strategy:

[0117] The PID control algorithm running in MCU521 controls the operation of the thermoelectric cooler 510 according to the following logic:

[0118] When the temperature of battery pack 200 is lower than the set threshold, the heating mode is activated to heat the temperature of battery pack 200 to above the set value.

[0119] When the temperature of battery pack 200 exceeds the set threshold, the cooling mode is activated to control the temperature of battery pack 200 to around the set value.

[0120] When the temperature of the battery pack 200 is within the set range, the temperature control module 500 stops working.

[0121] When the temperature of the battery pack 200 exceeds the set threshold, the BMS module 400 will cut off the output of the battery pack 200, and at the same time the temperature control module 500 will cool down at full capacity to prevent the battery pack 200 from thermal runaway.

[0122] This embodiment provides a temperature-controlled electric motorcycle battery that utilizes a thermoelectric cooler 510 (TEC) for active bidirectional temperature control of the battery pack 200. Combined with the thermal conductivity of the heat spreader 300 and temperature monitoring by a single high-precision temperature sensor 540, effective temperature control of the battery pack 200 is achieved. This solution uses a synchronous buck / boost controller chip with an integrated H-bridge to drive the TEC, simplifying circuit design. Through a PID control algorithm and a bidirectional TEC drive controller 520, the TEC's operating state can be dynamically adjusted based on the battery pack 200 temperature and status information provided by the BMS module 400, maintaining the battery pack 200 within a suitable temperature range. The independent power supply 530 for the temperature control module 500 avoids impacting the range of the electric motorcycle's main battery. This solution effectively solves the performance degradation problem of the battery pack 200 under high and low temperature environments, improving the safety and reliability of the battery pack 200. The use of a single high-precision temperature sensor 540 simplifies system design and reduces costs. Reliable data transmission is achieved through a UART communication interface. The metal casing 100 also serves as a heat sink, utilizing natural convection for heat dissipation. Its simple structure further reduces costs and energy consumption.

[0123] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0124] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0125] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A temperature-controlled electric motorcycle battery, characterized in that, include: Metal casing (100); The battery pack (200) is disposed within the metal casing (100) and includes a plurality of soft-pack lithium polymer cells stacked on top of each other; A heat spreader (300) is disposed on the battery pack (200), and a first surface of the heat spreader (300) is thermally coupled to at least one surface of the battery pack (200). A BMS module (400) is disposed inside the metal casing (100) and is used to monitor and manage the status of the battery pack (200); A temperature control module (500), disposed within the metal casing (100), includes: A semiconductor cooling chip (510) is provided, wherein the first surface of the semiconductor cooling chip (510) is thermally coupled to the second surface of the heat spreader (300), and the second surface of the semiconductor cooling chip (510) is thermally coupled to the inner surface of the metal casing (100). A bidirectional TEC drive controller (520) is communicatively connected to the BMS module (400) and is used to control the direction and magnitude of the current flowing through the semiconductor cooling chip (510); The power supply (530) is electrically connected to the bidirectional TEC drive controller (520) and electrically isolated from the drive battery of the electric motorcycle; At least one temperature sensor (540) is disposed on the battery pack (200) and / or the heat spreader (300) and electrically connected to the bidirectional TEC drive controller (520) for monitoring the temperature of the battery pack (200); A TEC charging interface (550) is disposed on the metal casing (100) and electrically connected to the power supply (530) for charging the power supply (530).

2. The electric motorcycle battery with temperature control according to claim 1, characterized in that: The first surface of the semiconductor cooling chip (510) is disposed in the central region of the heat spreader (300).

3. The electric motorcycle battery with temperature control according to claim 1, characterized in that: The power supply (530) is a lithium-ion battery pack (200) or a lithium polymer battery pack (200).

4. The electric motorcycle battery with temperature control according to claim 1, characterized in that: The charging interface is a USB Type-C interface.

5. The electric motorcycle battery with temperature control according to claim 1, characterized in that: The heat spreader (300) is made of copper or aluminum.

6. The electric motorcycle battery with temperature control according to claim 1, characterized in that: Thermally conductive interface material is filled between the heat spreader (300) and the thermoelectric cooler (510), as well as between the thermoelectric cooler (510) and the metal casing (100).

7. The electric motorcycle battery with temperature control according to claim 1, characterized in that: The bidirectional TEC drive controller (520) includes: MCU (521) is used to run control algorithms and output control signals; A voltage controller (522) is provided, with its input terminal electrically connected to the power supply (530) and its output terminal electrically connected to the thermoelectric cooler (510). The voltage controller (522) adjusts its output voltage according to the control signal of the MCU (521), thereby controlling the direction and magnitude of the current flowing through the thermoelectric cooler (510). The signal conditioning circuit (523) is connected to the temperature sensor (540) and the MCU (521) and is used to convert the analog signal collected by the temperature sensor (540) into a digital signal. A communication interface circuit (524) connects the MCU (521) and the BMS module (400) and is used for communication between the bidirectional TEC drive controller (520) and the BMS module (400). A current detection amplifier circuit (525) is connected to the current loop of the thermoelectric cooler (510) and is used to detect the current flowing through the thermoelectric cooler (510). The power supply circuit (526) is connected to the power supply (530) and supplies power to the MCU (521), voltage controller (522), signal conditioning circuit (523), communication interface circuit (524) and current detection and amplification circuit (525).

8. The electric motorcycle battery with temperature control according to claim 1, characterized in that: It also includes a protective frame (600), which includes protective plates (610) disposed on both sides of the battery pack (200) in the stacking direction, and a fixing bracket (620) located on the terminal side of the battery pack (200). One end of the fixing bracket (620) is fixedly connected to the metal shell (100), and the other end is fixedly connected to one of the protective plates (610). The other protective plate (610) is fixedly connected to the metal shell (100). A gap is left between the fixed bracket (620) and the battery pack (200). The BMS module (400), the bidirectional TEC drive controller (520) and the power supply (530) are fixed on the side of the fixed bracket (620) away from the battery pack (200).

9. The electric motorcycle battery with temperature control according to claim 8, characterized in that: The metal casing (100) is in the shape of a parallelogram prism, and the height direction of the parallelogram prism is the same as the height direction of the battery pack (200). The metal casing (100) is also provided with an input interface, an output interface and a display screen, which are located on different surfaces of the metal casing (100).

10. The electric motorcycle battery with temperature control according to claim 9, characterized in that: The metal casing (100) is also provided with two handles (110) and two locking blocks (120), which are respectively provided on different surfaces of the metal casing (100).

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