A zoned heating system and a high-voltage battery management system for a high-voltage BMS

Abstract

A zoned heating system and a high-voltage battery management system for a high-voltage BMS are disclosed. The zoned heating system includes multiple temperature sensors, each disposed on multiple battery packs, for collecting current temperature data of their respective battery packs; multiple heating films, each disposed on a battery pack, for heating the battery packs; and a main control module electrically connected to both the temperature sensors and the heating films, configured to receive temperature data from the temperature sensors and send heating control signals to the multiple heating films. This embodiment of the invention effectively eliminates internal temperature differences within the battery packs by real-time acquisition of temperature data from each battery pack and independent control of the corresponding heating film's operating state, achieving precise zoned temperature control. This provides advantages such as improved battery system temperature uniformity, extended service life, and enhanced operational safety.

Description

Technical Field

[0001] This utility model relates to the field of battery management system technology, specifically to a zoned heating system and a high-voltage battery management system for a high-voltage BMS. Background Technology

[0002] In energy storage systems, the operating status of high-voltage battery packs directly affects the overall performance and economy of the system, while the battery thermal management system is a crucial component influencing battery life, safety, and energy efficiency. Current technologies often employ heating components within the battery casing to raise the overall temperature of the casing, thereby improving its discharge performance in low-temperature environments. This type of heating typically uses uniform heating elements, heating tubes, or hot air circulation systems to compensate for the heat of the entire battery pack and is widely used in new energy vehicles, residential, and commercial energy storage devices.

[0003] However, in low-temperature environments, traditional overall heating methods struggle to meet the specific heating needs of each battery module, easily leading to localized overheating or underheating, resulting in uneven temperature distribution. Furthermore, some battery packs operating under significant temperature differences for extended periods can cause increased internal resistance variations, performance imbalances between cells, and further impact system lifespan. Therefore, designing a heating system suitable for high-voltage BMS systems, with zoned deployment and independent control capabilities, has become a crucial technological direction for addressing low-temperature performance degradation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a zoned heating system and a high-voltage battery management system for a high-voltage BMS, which has the advantages of achieving precise zoned temperature control, reducing internal temperature differences within the battery pack, and improving system safety and service life.

[0005] The technical solution is as follows:

[0006] On one hand, this utility model provides a zoned heating system for a high-pressure BMS, comprising:

[0007] Multiple temperature sensors are respectively installed on multiple battery packs, and the temperature sensors are used to collect the current temperature data of the corresponding battery pack.

[0008] Multiple heating films are respectively disposed on the battery pack for heating the battery pack;

[0009] The main control module is electrically connected to the temperature sensor and the heating film respectively. The main control module is configured to receive temperature data from the temperature sensor and send heating control signals to the multiple sets of heating films.

[0010] Furthermore, the heating film includes a first electrode connection portion and a second electrode connection portion, which are respectively disposed at both ends of the heating film;

[0011] The heating element is used to provide heating to multiple battery cells.

[0012] An insulating portion, surrounding the edge region of the heating portion and the first electrode connection portion, is used to provide electrical insulation.

[0013] Furthermore, the heating element is composed of multiple heating sub-parts extending along the arrangement direction of the battery cells.

[0014] Furthermore, it also includes multiple switching units. The main control module is electrically connected to multiple heating films through the multiple switching units respectively. The switching units are used to control the on / off state of the heating films.

[0015] Furthermore, the switching unit includes a switching transistor, which is a MOSFET.

[0016] Furthermore, it also includes a power supply unit, the positive terminal of which is electrically connected to the first electrode connection portion, and the negative terminal of which is electrically connected to the second electrode connection portion. The power supply unit is used to supply power to the heating film.

[0017] Furthermore, a relay is provided between the positive terminal of the power supply unit and the first electrode connection portion. The relay includes a common terminal, a normally open terminal, and a control terminal. The common terminal is connected to the positive terminal of the power supply unit, the normally open terminal is connected to the first electrode connection portion of the heating film, and the control terminal is connected to the main control module to enable the normally open terminal to conduct with the common terminal when the heating control signal is received.

[0018] Furthermore, an airflow device is provided between the negative terminal of the power supply unit and the connection part of the second electrode.

[0019] On the other hand, this utility model also provides a high-voltage battery management system, including the partitioned heating system for high-voltage BMS and the battery housing as described above, wherein the battery housing is provided with multiple battery packs arranged in rows or regions.

[0020] Furthermore, the battery pack also includes multiple individual battery cells, and the temperature sensor is also disposed on the individual battery cells.

[0021] This utility model provides a zoned heating system and a high-voltage battery management system for a high-voltage BMS, including a closed-loop control system consisting of multiple temperature sensors, multiple sets of heating films and a main control module. By collecting temperature data of each battery pack in real time and independently controlling the working state of the corresponding heating film, it effectively eliminates internal temperature differences in the battery pack, achieves precise zoned temperature control, and has the advantages of improving the temperature uniformity of the battery system, extending service life and ensuring operational safety. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a system structure block diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a structural schematic diagram of the battery box of this utility model;

[0025] Figure 3 This is a system structure block diagram of another embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the heating film of this utility model.

[0027] Figure label:

[0028] 100. Temperature sensor;

[0029] 200, heating film; 210, first electrode connection part; 220, second electrode connection part; 230, heating part; 231, heating sub-part;

[0030] 300. Main control module;

[0031] 400. Switching unit;

[0032] 500. Power supply unit;

[0033] 600. Relay;

[0034] 700. Airflow device;

[0035] 800. Battery housing; 810. Battery pack; 811. Individual battery cell. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] In existing technologies, thermal management of high-voltage battery packs often employs a uniform heating method to raise the temperature of the battery pack as a whole. While this method uses heating elements or a hot air circulation system to apply heat compensation to the entire battery pack and improves low-temperature discharge performance, it cannot address the actual temperature differences between different areas of the battery. When temperature gradients exist between battery modules, uniform heating can easily lead to localized overheating or underheating, resulting in increased internal resistance differences and imbalances in cell performance.

[0041] To address the aforementioned issues, a heating system capable of zoned control based on the actual temperature state of the battery pack is needed. Analysis reveals that the core deficiency of traditional heating methods lies in the lack of dynamic sensing and independent control over the battery pack's temperature distribution. Therefore, this paper proposes deploying temperature acquisition and heating execution units at the battery pack level, constructing zoned temperature monitoring and independent heating control logic. By modularizing the heating function and mapping it one-to-one with each battery pack, the goal of on-demand heating can be achieved.

[0042] Therefore, refer to Figure 1 This application proposes a zoned heating system comprising multiple temperature sensors 100, multiple heating films 200, and a main control module 300. The temperature sensors 100 are respectively disposed on the surface of the battery pack 810 to collect real-time temperature data of each battery pack 810. The heating films 200 are correspondingly installed on the battery packs 810 to perform heating actions. The main control module 300 establishes an electrical connection with the temperature sensors 100 and the heating films 200, and generates corresponding heating control signals based on the received temperature data.

[0043] Among them, the temperature sensor 100 is a detection device that converts the physical quantity of temperature into an electrical signal, specifically implemented using a thermocouple or a thermistor, and its function is to monitor the temperature change of the corresponding battery pack 810 in real time. The heating film 200 is a thin-film element with electrothermal conversion function, specifically made using conductive ink printing or metal foil etching processes, and its function is to convert electrical energy into heat energy to heat the battery pack 810 in contact. The main control module 300 is a control unit with data processing and signal output capabilities, specifically implemented using a microcontroller or programmable logic device, and its function is to analyze temperature data and generate corresponding heating commands.

[0044] In practice, the temperature sensor 100 continuously collects temperature data from each battery pack 810 and transmits it to the main control module 300. When the temperature of a battery pack 810 is detected to be lower than a preset threshold, the main control module 300 sends a start signal to the corresponding heating film 200, causing the heating film 200 in that area to be energized and heated. When the temperature reaches the set range, the main control module 300 terminates the heating command for that area. By independently controlling the working state of each heating film 200, differentiated temperature regulation of different battery packs 810 is achieved.

[0045] In practical implementation, the main control module 300 is a circuit system that includes sensor signal acquisition and the coordinated operation of various control execution components, including an embedded processor, sensor signal input interface, device component control signal output interface, and related electronic circuits.

[0046] Compared to existing technologies, traditional overall heating methods apply the same heating intensity to all battery packs 810, while this solution, by deploying sensors and heating units in different areas, can precisely control the temperature according to the actual temperature of each battery pack 810. This design eliminates the problem of uneven temperature distribution caused by environmental differences or battery aging, and avoids local overheating or underheating.

[0047] Reference Figure 4 This application further proposes that the heating film 200 includes a first electrode connection portion 210 and a second electrode connection portion 220, the first electrode connection portion 210 and the second electrode connection portion 220 being respectively disposed at both ends of the heating film 200; a heating portion 230 for providing heating function to a plurality of battery cells 811; and an insulating portion surrounding the edge region of the heating portion 230 and the first electrode connection portion 210 for providing electrical insulation.

[0048] Furthermore, the heating element 230 is composed of multiple heating sub-units 231 extending along the arrangement direction of the battery cells 811. Each heating sub-unit 231 is an independently arranged strip-shaped heating unit, and each heating sub-unit 231 covers the surface area of ​​the corresponding battery cell 811, achieving local temperature regulation through independent control.

[0049] The extension along the arrangement direction of the battery cell 811 means that the length direction of the heating sub-section 231 is parallel to the arrangement axis of the battery cell 811 in the battery pack 810. Specifically, this can be achieved by designing the heating sub-section 231 as a strip structure that matches the width of the battery cell 811, so as to ensure that the heat is evenly distributed along the surface of the battery cell 811.

[0050] The heating film 200 can be a sheet-like structure, and its internal structure includes a first electrode connection portion 210 disposed at one end of the film, a second electrode connection portion 220 disposed at the other end, and a heating portion 230. The first electrode connection portion 210 and the second electrode connection portion 220 are respectively connected to the positive and negative terminals of the power supply unit 500 through conductive structures to form a heating circuit.

[0051] The heating element 230 is located in the central region of the heating film 200 and is composed of multiple heating sub-elements 231. The heating sub-elements 231 extend parallel to the arrangement direction of the battery cells 811, and their size is approximately the same as the battery cells 811. Specifically, the heating sub-elements 231 can be formed using a serpentine arrangement of resistive paths or parallel metal heating wires to uniformly generate heat. The heating element 230 forms a continuous conductive path between the first electrode connection portion 210210 and the second electrode connection portion 220220. When current passes through, Joule heating is generated, thereby achieving distributed heating of the entire heating film 200. Furthermore, the heating film 200200 also has an insulating portion located at the outer edge of the heating element 230230 and the electrode connection portions 210 and 220, used to cover the conductive structure and provide electrical isolation.

[0052] In practice, the insulation part can be made of polyimide film, PET insulation layer or other flexible insulation materials with the same or similar functions to ensure that there is no electrical short circuit between the heating film 200 and the battery surface or the metal structure of the box during the heating process.

[0053] Compared to existing technologies, current heating components typically use a single heating element to cover the entire surface of the battery pack 810, resulting in uneven heat distribution and an inability to adapt to temperature differences in different areas. This solution divides the heating element 230 into multiple heating sub-parts 231 extending along the arrangement direction of the battery cells 811, and combines this with insulating parts to partially wrap the conductive areas. This enables independent heat conduction for each battery cell 811, while avoiding the risk of short circuits caused by exposed electrodes.

[0054] Through the above technical solution, this application can achieve directional heating at the 811 level of a single battery cell, reducing heat interference between adjacent areas and thus improving heating uniformity. The insulating part wraps around the edges of the electrode connection part and the heating part 230, effectively preventing leakage or arcing caused by poor electrical contact under high voltage conditions, and enhancing the reliability of the system under complex operating conditions.

[0055] This application further proposes that multiple switching units 400 are included, and the main control module 300 is electrically connected to multiple heating films 200 through the multiple switching units 400 respectively. The switching units 400 are used to control the on / off state of the heating films 200. The switching unit 400 refers to an electronic component used to control the on / off state of the circuit, which can be implemented using a MOSFET. By controlling the on / off state of the MOSFET, independent control of the power supply circuit of the heating film 200 is achieved. The connection of the main control module 300 to the heating film 200 through the switching units 400 means that the output signal of the main control module 300 is transmitted to the heating film 200 through the switching units 400, so that the on / off state of each heating film 200 can be independently adjusted, thereby realizing differentiated heating control for different battery packs 810.

[0056] Furthermore, it also includes multiple switching units 400. The main control module 300 is electrically connected to multiple heating films 200 through the multiple switching units 400 respectively. The switching units 400 are used to control the on / off state of the heating films 200. The switching unit 400 includes a switching transistor, which is a MOSFET.

[0057] Among them, MOSFET refers to a metal-oxide-semiconductor field-effect transistor, which can be implemented using N-channel or P-channel enhancement-mode devices. As a voltage-controlled semiconductor switch, it regulates the conduction state between the source and drain by adjusting the gate voltage. This device is used in the circuit to replace the mechanical relay 600, achieving precise control of the on / off state of the heating film 200 through high-frequency switching characteristics, thereby avoiding contact problems caused by contact oxidation.

[0058] Reference Figure 1 and Figure 3This application further proposes a power supply unit 500, whose positive terminal is electrically connected to the first electrode connection portion 210, and whose negative terminal is electrically connected to the second electrode connection portion 220. The power supply unit 500 is used to supply power to the heating film 200. The power supply unit 500 refers to a power module that provides electrical energy to the heating film 200. Specifically, it can be implemented using an adjustable voltage DC power supply or a constant current source. Its positive and negative terminals form a closed loop directly with the electrode connection portion of the heating film 200 through wires. The first electrode connection portion 210 is the positive terminal interface of the heating film 200, which can be implemented using copper foil or a silver-plated metal sheet, and is used to receive the positive output current of the power supply unit 500. The second electrode connection portion 220 is the negative terminal interface of the heating film 200, which can be implemented using a conductive material of the same material as the positive terminal, and is used to guide the current back to the negative terminal of the power supply unit 500. The heating film 200 refers to the flexible heating element covering the surface of the battery pack 810. Specifically, it can be achieved by using carbon fiber composite material or metal resistance wire embedded in a polyimide film, which converts electrical energy into heat energy through the Joule effect.

[0059] Specifically, the positive terminal of the power supply unit 500 is connected to the first electrode connection portion 210 of the heating film 200 via a wire, and the negative terminal is connected to the second electrode connection portion 220 via another wire. When the main control module 300 determines that heating is required based on the data from the temperature sensor 100, the power supply unit 500 is activated, and current flows from the positive terminal through the heating part 230 of the heating film 200 and returns to the negative terminal, causing the heating film 200 to generate heat and transfer it to the battery pack 810. Since each heating film 200 is independently connected to the power supply unit 500, the main control module 300 can achieve independent heating of different battery packs 810 by controlling the on / off state of the power supply unit 500.

[0060] This application further proposes that a relay 600 is provided between the positive terminal of the power supply unit 500 and the first electrode connection part 210. The relay 600 includes a common terminal, a normally open terminal and a control terminal. The common terminal is connected to the positive terminal of the power supply unit 500, the normally open terminal is connected to the first electrode connection part 210 of the heating film 200, and the control terminal is connected to the main control module 300, which is used to connect the normally open terminal and the common terminal when a heating control signal is received.

[0061] In this context, relay 600 refers to a switching device that controls the on / off state of a circuit via an electrical signal. Specifically, it can be implemented using an electromagnetic relay 600 or a solid-state relay 600. Its function is to switch the connection state between the power supply unit 500 and the heating film 200 according to the instructions of the main control module 300. The common terminal refers to the fixed contact in relay 600 that is directly connected to the positive terminal of the power supply unit 500. It can be made of copper alloy and is used to establish a stable electrical connection at the power input terminal. The normally open terminal refers to the moving contact in relay 600 that is connected to the first electrode connection part 210 of the heating film 200. Specifically, it can be kept disconnected from the common terminal by a spring mechanism, and only becomes conductive when the control terminal is triggered. The control terminal refers to the interface in relay 600 that receives drive signals from the main control module 300. It can be connected using a low-voltage signal line and is used to control the closing and opening of the contacts according to heating requirements.

[0062] It should be noted that, although Figure 1 and Figure 3 The internal terminal structure of relay 600 is not explicitly shown, but the aforementioned three-terminal configuration and control method are conventional knowledge for those skilled in the art and can be achieved through the selection and wiring of a standard relay 600 model. In specific implementation, relay 600 is located at the front end of the power supply circuit and can serve as the main control switch for system heating. It is used to quickly cut off the power supply path to the entire heating film 200 in abnormal situations to ensure the safe operation of the battery system.

[0063] Specifically, when the main control module 300 determines that heating is required based on the temperature data of the battery pack 810 collected by the temperature sensor 100, it sends a heating control signal to the control terminal of the corresponding relay 600. At this time, the common terminal and normally open terminal of the relay 600 are connected, and the positive terminal of the power supply unit 500 supplies power to the first electrode connection portion 210 of the heating film 200 through the relay 600, and the heating film 200 begins to heat the battery pack 810. When the temperature reaches a preset threshold, the main control module 300 stops sending control signals, the relay 600 disconnects the power supply circuit, and the heating process terminates. By independently controlling each relay 600, the heating films 200 in different areas can work in shifts or synchronously according to the actual temperature requirements of the corresponding battery pack 810.

[0064] This application further proposes that an airflow device 700 is provided between the negative terminal of the power supply unit 500 and the second electrode connection portion 220. The airflow device 700 is a heat dissipation device used to accelerate airflow, specifically an axial fan or a centrifugal fan, which reduces the temperature rise of the connection portion through forced convection. The power supply unit 500 is a power module that provides electrical energy to the heating film 200, specifically a DC power supply or a battery pack 810, with its negative terminal forming a circuit with the second electrode connection portion 220 of the heating film 200.

[0065] Specifically, when the heating film 200 heats the battery pack 810 in sections, the current flowing through the electrode connection generates Joule heat. The airflow 700 is positioned along the connection path between the negative terminal of the power supply unit 500 and the second electrode connection 220, actively driving airflow to remove accumulated heat. For example, during continuous operation of the heating film 200, the airflow 700 adjusts its rotation speed according to instructions from the main control module 300, maintaining the temperature of the electrode connection area within a safe threshold. This suppresses changes in contact resistance between the electrode connection and the power supply unit 500, preventing electrical connection failure due to localized overheating.

[0066] Compared to existing technologies, traditional solutions rely on natural convection for heat dissipation at the electrode connection points, which can easily lead to heat buildup during prolonged high-power heating. This solution actively enhances heat dissipation by adding a 700 airflow diffuser, effectively reducing temperature fluctuations at the connection points and preventing material aging or poor contact caused by excessive temperature rise.

[0067] This application further proposes a high-voltage battery management system, including a zoned heating system for a high-voltage BMS and a battery housing 800, wherein the battery housing 800 contains multiple battery packs 810 arranged in rows or zones.

[0068] The high-voltage battery management system refers to the control unit that integrates battery status monitoring, thermal management, and energy control functions. Specifically, it can be implemented using an architecture where a distributed controller and a main control module 300 work collaboratively. This architecture is used to acquire real-time temperature data of the battery pack 810 and execute zoned heating strategies. The battery enclosure 800 refers to the mechanical structure that houses the battery pack 810. Specifically, it can be implemented using a modular design combining an aluminum alloy frame and fireproof partitions. Its internal space is divided into multiple independent areas, each corresponding to the installation position of a set of battery packs 810. Row or zone arrangement refers to the spatial distribution of the battery packs 810. Specifically, it can be implemented using a matrix arrangement or a honeycomb layout based on the shape of the individual battery cells 811, allowing each battery pack 810 to form an independently controllable heating unit within the enclosure.

[0069] Specifically, the battery housing 800 is internally divided into multiple heating zones by physical partitions. Each zone corresponds to a set of battery packs 810 and their associated temperature sensors 100 and heating films 200. The main control module 300 receives temperature data from each zone and independently controls the power supply status of the corresponding heating films 200. When the temperature of a zone falls below a set threshold, the main control module 300 only activates the heating film 200 in that area for directional heating, while other areas that have reached the required temperature remain off. The row-and-column arrangement of the battery packs 810 clearly defines the boundaries of the heating areas, preventing heat from spreading across zones and causing energy loss.

[0070] This application further proposes that the battery pack 810 also includes multiple battery cells 811, and the temperature sensor 100 is also disposed on the battery cells 811.

[0071] In this context, a single battery cell 811 refers to the smallest independent unit constituting a battery pack 810. Specifically, it can be implemented using electrochemical units such as lithium-ion batteries, lithium iron phosphate batteries, or solid-state batteries. Each battery cell 811 is connected in series or parallel to form the battery pack 810. A temperature sensor 100 mounted on a single battery cell 811 means that the temperature detection device is directly installed on the surface or at a specific location inside the cell. Specifically, it can be implemented using a surface-mount thermistor, a thin-film temperature sensor 100, or a digital temperature sensor 100 integrated inside the battery, used to monitor the temperature changes of individual battery cells 811 in real time.

[0072] Specifically, the battery pack 810 is composed of multiple battery cells 811 arranged in rows or regions. Temperature sensors 100 not only cover the entire battery pack 810 but are also deployed in each individual battery cell 811. The main control module 300 receives data from the individual cell temperature sensors 100, independently determining the heating requirements of each cell and generating corresponding heating control signals based on preset temperature thresholds or dynamic algorithms. For example, when the temperature of a battery cell 811 is below a preset operating range, the main control module 300 only activates heating on the heating film 200 in the area where that cell is located, while the heating films 200 for other cells within the normal temperature range remain off. Thus, the system can perform differentiated control based on temperature differences at the cell level, avoiding localized overheating or heating lag caused by uneven temperature distribution among cells within the battery pack 810.

[0073] Compared to existing technologies, traditional heating solutions rely solely on temperature monitoring at the battery pack 810 level, failing to identify temperature differences between individual cells within the pack, resulting in inefficient heating control. This solution, however, deploys temperature sensors 100 at the individual cell level, combined with the control logic of the zoned heating films 200, enabling precise identification and response to temperature fluctuations at the individual cell level. For example, in low-temperature environments, if a cell experiences a faster temperature drop due to its proximity to a heat dissipation vent, the system can activate its corresponding heating film 200 independently, without heating the entire battery pack 810, thereby reducing energy waste and mitigating the risk of thermal runaway.

[0074] In one embodiment, the temperature sensor 100 is a high-precision surface-mount NTC thermistor with a nominal resistance of 10kΩ, a B value of 3435K, and a response time of less than 5 seconds, suitable for monitoring the surface temperature of the battery cell 811. To ensure temperature measurement accuracy and structural reliability, the temperature sensor 100 is pressed onto the outer surface of the battery cell 811 housing via a thermally conductive insulating sheet, preferably positioned in the middle area of ​​the side of the housing or near the root of the tab to obtain better thermal response characteristics. Simultaneously, a flexible thermally conductive insulating pad is sandwiched between the sensor and the housing. This pad is made of polyimide substrate with a thermal conductivity of not less than 1W / m·K, possessing good pressure resistance and thermal aging performance. One side of the thermally conductive pad is pre-coated with pressure-sensitive adhesive for initial positioning during battery module assembly. Subsequent clamping and fixing are achieved through limiting structures or plastic clamps on the module housing, ensuring long-term stable adhesion of the sensor and preventing thermal response distortion or detachment caused by vibration.

[0075] In terms of electrical connection, the sensor is connected to the lead wire through a highly reliable welding method. The lead wire is made of highly flexible insulating material and is laid in the wiring groove inside the module housing. Finally, it is connected to the plug-in component of the main control module 300 to realize the independent acquisition and uploading of temperature signals of each battery cell 811.

[0076] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A zoned heating system for a high pressure BMS, characterized by, include: Multiple temperature sensors (100) are respectively disposed on multiple battery packs (810), and the temperature sensors (100) are used to collect the current temperature data of the corresponding battery pack (810); Multiple heating films (200) are respectively disposed on the battery pack (810) for heating the battery pack (810); The main control module (300) is electrically connected to the temperature sensor (100) and the heating film (200) respectively. The main control module (300) is configured to receive temperature data from the temperature sensor (100) and send heating control signals to the multiple sets of heating films (200).

2. The zoned heating system for high pressure BMS of claim 1, wherein, The heating film (200) includes a first electrode connection portion (210) and a second electrode connection portion (220), which are respectively disposed at both ends of the heating film (200); The heating element (230) is used to provide heating to multiple battery cells (811); An insulating portion, surrounding the edge region of the heating portion (230) and the first electrode connection portion (210), is used to provide electrical insulation.

3. The zoned heating system for high pressure BMS of claim 2, wherein, The heating element (230) is composed of multiple heating sub-parts (231) extending along the arrangement direction of the battery cells (811).

4. The zoned heating system for high-pressure BMS according to claim 1, characterized in that, It also includes multiple switching units (400), and the main control module (300) is electrically connected to multiple heating films (200) through the multiple switching units (400) respectively. The switching units (400) are used to control the on / off state of the heating films (200).

5. The zoned heating system for high-pressure BMS according to claim 4, characterized in that, The switching unit (400) includes a switching transistor, which is a MOS transistor.

6. The zoned heating system for high-pressure BMS according to claim 2, characterized in that, It also includes a power supply unit (500), the positive terminal of which is electrically connected to the first electrode connection part (210), and the negative terminal of which is electrically connected to the second electrode connection part (220). The power supply unit (500) is used to supply power to the heating film (200).

7. The zoned heating system for high-pressure BMS according to claim 6, characterized in that, A relay (600) is also provided between the positive terminal of the power supply unit (500) and the first electrode connection part (210). The relay (600) includes a common terminal, a normally open terminal and a control terminal. The common terminal is connected to the positive terminal of the power supply unit (500), the normally open terminal is connected to the first electrode connection part (210) of the heating film (200), and the control terminal is connected to the main control module (300) to make the normally open terminal and the common terminal conduct when the heating control signal is received.

8. The zoned heating system for high-pressure BMS according to claim 6, characterized in that, A fan (700) is also provided between the negative terminal of the power supply unit (500) and the second electrode connection part (220).

9. A high-voltage battery management system, characterized in that, Includes a zoned heating system for a high-voltage BMS and a battery housing (800) as described in any one of claims 1-8, wherein the battery housing (800) contains a plurality of battery packs (810) arranged in rows or zones.

10. The high-voltage battery management system according to claim 9, characterized in that, The battery pack (810) also includes multiple battery cells (811), and the temperature sensor (100) is also disposed on the battery cells (811).

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