Battery device and electric vehicle
By setting a heating layer and a temperature detection module on the outer surface of the battery module, the problem of reduced range of lithium batteries in low-speed four-wheeled vehicles in low-temperature environments is solved, and efficient charging and discharging of the battery under low-temperature conditions is achieved, improving the safety and reliability of the battery device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TIANNENG NEW MATERIAL CO LTD
- Filing Date
- 2025-02-07
- Publication Date
- 2026-04-17
AI Technical Summary
Existing lithium battery products for low-speed four-wheeled vehicles have reduced driving range in low-temperature environments, and conventional lithium battery structures suffer from low energy density and short cycle life.
A heating layer is set on the outer surface of the battery module and equipped with a temperature detection module. The temperature detection module is electrically connected to the heating layer to monitor the temperature of the battery module in real time, control the working status of the heating layer, and ensure that the battery module is maintained within the preset temperature range in low-temperature environments.
It effectively alleviates the problem of reduced driving range in low temperatures, improves the charging and discharging performance of the battery in low-temperature environments, optimizes the low-temperature performance of the battery device, and enhances the safety and reliability of the battery device.
Smart Images
Figure CN224138205U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of transportation technology, and in particular to a battery device and an electric vehicle. Background Technology
[0002] In recent years, the application of lithium batteries in electric two-wheelers, three-wheelers, and low-speed four-wheelers has been greatly promoted. However, existing battery packs for low-speed four-wheelers have many problems. On the one hand, although lead-acid batteries are low-cost, inexpensive, stable, and safe, they have drawbacks such as low energy density, short cycle life, and lead pollution in the supply chain, making them unable to meet the needs of mainstream low-speed vehicles. On the other hand, conventional lithium battery product structures suffer from reduced driving range at low temperatures. Utility Model Content
[0003] The main purpose of this application is to propose a battery device and electric vehicle that aims to solve the problem of reduced driving range at low temperatures in existing lithium battery products.
[0004] To achieve the above objectives, the battery device proposed in this application includes:
[0005] A housing, wherein the housing has an internal cavity;
[0006] A battery module, wherein the battery module is disposed within the cavity;
[0007] A heating layer is disposed on the outer surface of the battery module;
[0008] A temperature detection module is disposed on the outer surface of the battery module; the temperature detection module is electrically connected to the battery module and the heating layer respectively.
[0009] In one embodiment, the heating layer is disposed at least on opposite sides of the battery module; and / or,
[0010] The battery device further includes a battery management module, which is electrically connected to the battery module, the temperature detection module and the heating layer.
[0011] In one embodiment, the battery device further includes a plate body disposed between the inner wall of the housing and the battery module. The two ends of the plate body are respectively fixedly connected to the inner wall of the housing. A mounting plate is provided on the side of the plate body facing the inner wall of the housing, and the battery management module is mounted on the mounting plate.
[0012] In one embodiment, the mounting plate is provided with a limiting groove, the battery management module is located in the limiting groove, and the battery management module is detachably connected to the limiting groove.
[0013] In one embodiment, an insulating layer is provided on the inner sidewall of the housing; and / or,
[0014] A flame-retardant layer is provided on the inner bottom wall of the housing; and / or,
[0015] The inner bottom wall of the shell is provided with a reinforcing beam structure around its perimeter; and / or,
[0016] The outer surface of the housing is provided with a handle; and / or
[0017] The housing includes a lower box and an upper cover, the lower box and the upper cover surrounding each other to form the cavity, and the lower box and the upper cover are detachably connected.
[0018] In one embodiment, the battery module includes a first cell assembly and a second cell assembly, with the heating layer disposed between the first cell assembly and the second cell assembly; the first cell assembly and the second cell assembly are connected in series and electrically connected to the battery management module.
[0019] In one embodiment, the battery device further includes a series aluminum busbar. The first cell assembly has a first connection terminal and a second connection terminal, and the second cell assembly has a third connection terminal and a fourth connection terminal. The first connection terminal is connected to the third connection terminal. One end of the series aluminum busbar is electrically connected to the first connection terminal, and the other end of the series aluminum busbar is electrically connected to the third connection terminal. The second connection terminal is electrically connected to the positive terminal of the battery device via a first connection line. The fourth connection terminal is electrically connected to the fifth connection terminal of the battery management module via a second connection line, and the sixth connection terminal of the battery management module is electrically connected to the negative terminal of the battery management module via a third connection line.
[0020] In one embodiment, one end of the series aluminum busbar is electrically connected to the first connecting end via a first fastener, and the other end of the series aluminum busbar is electrically connected to the third connecting end via a second fastener; one end of the first connecting wire is electrically connected to the second connecting end via a third fastener, and the other end of the first connecting wire is electrically connected to the positive terminal disposed outside the housing via a fourth fastener; one end of the second connecting wire is electrically connected to the fourth connecting end via a fifth fastener, and the other end of the second connecting wire is electrically connected to the fifth connecting end of the battery management module via a sixth fastener; one end of the third connecting wire is electrically connected to the positive terminal of the battery management module via a seventh fastener, and the other end of the third connecting wire is electrically connected to the negative terminal outside the housing via an eighth fastener; and / or,
[0021] Both the first battery cell assembly and the second battery cell assembly include a plurality of battery cell units arranged in an array, with a shock-absorbing layer provided between the battery cell units.
[0022] In one embodiment, the battery device further includes a plurality of acquisition lines, one end of which is electrically connected to one of the battery cells via a seventh fastener, and the other end of which is electrically connected to the battery management module via an eighth fastener; and / or,
[0023] The housing is also equipped with a switch button, an aviation plug, and a waterproof and breathable valve. The switch button and the aviation plug are electrically connected to the battery management module, respectively.
[0024] This application also proposes an electric vehicle including the battery device as described above.
[0025] The technical solution of this application employs a heating layer on the outer surface of the battery module, which can heat the battery module under low-temperature conditions and maintain its temperature within a preset range. This ensures normal internal operation of the battery module, improves the charging and discharging performance of the battery in low-temperature environments, and effectively alleviates the problem of reduced driving range in low temperatures. A temperature detection module is located on the outer surface of the battery module, enabling real-time monitoring of the battery module's temperature. By electrically connecting the temperature detection module to both the battery module and the heating layer, the operating state of the heating layer can be controlled according to the actual temperature of the battery module, achieving temperature regulation and avoiding overheating or underheating, further optimizing the low-temperature performance of the battery device. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1 A schematic diagram of the structure of an embodiment of the battery device provided in this application;
[0028] Figure 2 A schematic diagram of the structure of a battery module according to an embodiment of the battery device provided in this application;
[0029] Figure 3 This is a schematic diagram of the battery module from another perspective, representing an embodiment of the battery device provided in this application.
[0030] Explanation of icon numbers:
[0031] 1. Housing; 2. Battery module; 3. Heating layer; 4. Battery management module; 41. First cell assembly; 411. First connection terminal; 412. Second connection terminal; 42. Second cell assembly; 421. Third connection terminal; 422. Fourth connection terminal; 43. Fifth connection terminal; 44. Sixth connection terminal; 5. Board; 51. Mounting plate; 6. Insulation layer; 7. Flame retardant layer; 8. Handle; 9. Series aluminum busbar; 101. Positive terminal; 102. Negative terminal; 103. First connecting wire; 104. Second connecting wire; 105. Third connecting wire; 106. Data acquisition wire; 107. Switch button; 108. Aviation plug; 109. Waterproof and breathable valve.
[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0035] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0036] In recent years, the application of lithium batteries in electric two-wheelers, three-wheelers, and low-speed four-wheelers has been greatly promoted. However, existing battery packs for low-speed four-wheelers have many problems. On the one hand, although lead-acid batteries are low-cost, inexpensive, stable, and safe, they have drawbacks such as low energy density, short cycle life, and lead pollution in the supply chain, making them unable to meet the needs of mainstream low-speed vehicles. On the other hand, conventional lithium battery product structures suffer from reduced driving range at low temperatures.
[0037] To address the aforementioned problems, this application proposes a battery device.
[0038] Please see Figures 1 to 3 In one embodiment of this application, the battery device includes a housing 1, a battery module 2, a heating layer 3, and a temperature detection module. The housing 1 has a cavity inside; the battery module 2 is disposed in the cavity; the heating layer 3 is disposed on the outer surface of the battery module 2; the temperature detection module is disposed on the outer surface of the battery module 2; and the temperature detection module is electrically connected to the battery module 2 and the heating layer 3 respectively.
[0039] In the above structure, by setting a heating layer 3 on the outer surface of the battery module 2, the battery module 2 can be heated under low-temperature conditions, maintaining its temperature within a preset range. This ensures normal internal operation of the battery module 2, improves the battery's charging and discharging performance in low-temperature environments, and effectively alleviates the problem of reduced driving range at low temperatures. The temperature detection module is located on the outer surface of the battery module 2, enabling real-time monitoring of its temperature. By electrically connecting the temperature detection module to both the battery module 2 and the heating layer 3, the operating state of the heating layer 3 can be controlled according to the actual temperature of the battery module 2, achieving temperature regulation and preventing overheating or underheating, further optimizing the low-temperature performance of the battery device. The temperature detection module can be a thermistor, specifically a negative temperature coefficient thermistor.
[0040] In one embodiment, the heating layer 3 is provided on at least two opposite sides of the battery module 2. By providing the heating layer 3 on the opposite sides of the battery module 2, it is possible to ensure that heat is evenly transferred from both sides to all parts of the battery module 2, avoiding the problem of uneven heat distribution caused by unilateral heating, making heat utilization more efficient, reducing heat loss, and making the overall temperature of the battery module 2 more uniform, thereby improving the performance consistency of the battery in low-temperature environments.
[0041] In one embodiment, the battery device further includes a battery management module 4, which is electrically connected to the battery module 2, the temperature detection module, and the heating layer 3.
[0042] In the above structure, the Battery Management System (BMS) 4 is used to monitor and manage the overall status of the battery module 2. Through its connection with the battery module 2, the BMS 4 monitors parameters such as battery voltage, current, SOC (State of Charge), and SOH (State of Health) in real time. The BMS 4 receives real-time temperature data from temperature sensors through its connection with the temperature detection module; simultaneously, it controls the operating status of the heating layer 3, including starting, stopping, and adjusting the heating power, through its connection with the heating layer 3. The temperature detection module includes multiple temperature sensors arranged on the outer surface of the battery module 2 to monitor the temperature distribution of the battery module 2 in real time. The temperature sensors transmit the detected temperature data to the BMS 4, and the operating status of the heating layer 3 is controlled by the BMS 4 based on the data from the temperature detection module. When the temperature detection module detects that the temperature of the battery module 2 is lower than a preset low-temperature threshold (e.g., 0°C), the BMS 4 automatically activates the heating layer 3 to heat the battery module 2. When the temperature detection module detects that the temperature of the battery module 2 has reached the preset high temperature threshold (such as 15°C), the battery management module 4 automatically reduces the heating power or stops heating to maintain the battery module 2 within the optimal operating temperature range.
[0043] In one embodiment, the battery device further includes a plate 5, which is disposed between the inner wall of the housing 1 and the battery module 2. Both ends of the plate 5 are fixedly connected to the inner wall of the housing 1, and a mounting plate 51 is provided on the side of the plate 5 facing the inner wall of the housing 1. The battery management module 4 is mounted on the mounting plate 51.
[0044] In the above structure, the two ends of the plate 5 are fixedly connected to the inner wall of the housing 1, providing stable support for the battery module 2 and the battery management module 4, reducing the impact of vibration and shock on the battery module 2 and the battery management module 4, and improving the overall stability of the battery device. The plate 5 isolates the battery management module 4 from the battery module 2, preventing the battery management module 4 from being directly exposed to the high or low temperature environment of the battery module 2, reducing the impact of heat conduction on the performance of the battery management module 4. At the same time, it also avoids direct electrical contact between the battery management module 4 and the battery module 2, reducing the risk of short circuits or electrical faults, and improving the battery device's performance. The addition of plate 5 makes the installation of battery management module 4 more convenient. The mounting plate 51 provides a stable mounting position, facilitating the fixing and electrical connection of battery management module 4. When maintenance or replacement of battery management module 4 is required, it can be directly removed from plate 5 without disassembling the entire battery module 2, greatly simplifying the maintenance process. Furthermore, the design of plate 5 allows for efficient use of the internal space of the battery device. Battery management module 4, mounted on plate 5, does not occupy excessive cavity space, thus providing more space for battery module 2 and other components, improving the overall space utilization of the battery device. Through the isolation effect of plate 5, an appropriate distance is maintained between battery management module 4 and battery module 2, which is beneficial for heat dissipation and prevents battery management module 4 from affecting performance due to overheating.
[0045] In one embodiment, the mounting plate 51 is provided with a limiting groove, the battery management module 4 is located in the limiting groove, and the battery management module 4 is detachably connected to the limiting groove.
[0046] In the above structure, a limiting groove is provided on the mounting plate 51 for fixing the battery management module 4 (BMS). The shape and size of the limiting groove match the shape of the battery management module 4, providing stable support and limiting for the battery management module 4. The battery management module 4 and the limiting groove are connected in a detachable manner, such as by clips, screws, or elastic clamps, allowing the battery management module 4 to be quickly installed and removed, facilitating maintenance and replacement.
[0047] In one embodiment, an insulating layer 6 is provided on the inner sidewall of the housing 1; a flame-retardant layer 7 is provided on the inner bottom wall of the housing 1; a reinforcing beam structure is provided around the inner bottom wall of the housing 1; a handle 8 is provided on the outer surface of the housing 1; the housing 1 includes a lower box and an upper cover, the lower box and the upper cover surround to form the cavity, and the lower box and the upper cover are detachably connected.
[0048] In the above structure, an insulating layer 6 is provided on the inner wall of the housing 1 to prevent electrical short circuits between the battery module 2 and the housing 1, while reducing heat conduction and protecting the housing 1 from the heat generated by the battery module 2 during operation. A flame-retardant layer 7 is provided on the inner bottom wall of the housing 1 to prevent the spread of fire caused by the battery module 2 in extreme situations (such as thermal runaway or fire), thereby improving the safety of the battery device. A reinforcing beam structure is provided around the inner bottom wall of the housing 1 to enhance the mechanical strength and structural stability of the housing 1, preventing deformation of the housing 1 due to external impacts during transportation or use, thus protecting the internal battery module 2. A handle 8 is provided on the outer surface of the housing 1 for easy handling and installation of the battery device, improving the user experience. The housing 1 includes a lower casing and an upper cover, which are fixed together by a detachable connection method (such as screws, clips or sealing strips) to facilitate the assembly, maintenance and disassembly of the battery device, while ensuring the overall sealing and protection.
[0049] In one embodiment, the battery module 2 includes a first cell assembly 41 and a second cell assembly 42, with a heating layer 3 provided between the first cell assembly 41 and the second cell assembly 42; the first cell assembly 41 and the second cell assembly 42 are connected in series and electrically connected to the battery management module 4.
[0050] In the above structure, by placing the heating layer 3 between the first cell assembly 41 and the second cell assembly 42, and electrically connecting it to the battery management module 4 (BMS) via series connection, heat can be evenly transferred to the two cell assemblies, avoiding the temperature unevenness caused by unilateral heating and improving the overall performance of the battery module 2. Under low-temperature conditions, the heating layer 3 can quickly raise the temperature of the cell assemblies, ensuring that the battery module 2 maintains good charge and discharge performance in low-temperature environments, significantly extending the low-temperature driving range. This not only optimizes thermal management functions and improves low-temperature performance and safety, but also simplifies the structural layout, enhances overall reliability and maintenance convenience, enabling the battery device to perform better in low-temperature environments and providing users with a more reliable and efficient user experience.
[0051] In one embodiment, the battery device further includes a series aluminum busbar 9. The first cell assembly 41 is provided with a first connection terminal 411 and a second connection terminal 412. The second cell assembly 42 is provided with a third connection terminal 421 and a fourth connection terminal 422. The first connection terminal 411 is connected to the third connection terminal 421. One end of the series aluminum busbar 9 is electrically connected to the first connection terminal 411, and the other end of the series aluminum busbar 9 is electrically connected to the third connection terminal 421. The second connection terminal 412 is electrically connected to the positive terminal 101 of the battery device through a first connection line 103. The fourth connection terminal 422 is electrically connected to the fifth connection terminal 43 of the battery management module 4 through a second connection line 104. The sixth connection terminal 44 of the battery management module 4 is electrically connected to the negative terminal 102 of the battery management module 4 through a third connection line 105.
[0052] In the above structure, one end of the series aluminum busbar 9 is electrically connected to the first connection end 411, and the other end is electrically connected to the third connection end 421. The aluminum busbar enables a high-efficiency, low-resistance connection between the battery cell components, ensuring the stability and reliability of current transmission. Using the series aluminum busbar 9 to connect the battery cell components effectively reduces connection resistance, decreases energy loss, and improves the overall efficiency of the battery device. The high mechanical strength of the series aluminum busbar 9 ensures that the connection between the two battery cell components remains stable under vibration and shock environments, reducing the risk of failure due to loose connections. The second connection terminal 412 is electrically connected to the positive terminal 101 of the battery device through the first connection line 103. The fourth connection terminal 422 is electrically connected to the fifth connection terminal 43 of the battery management module 4 (BMS) through the second connection line 104. The sixth connection terminal 44 of the battery management module 4 is electrically connected to the negative terminal 102 of the battery device through the third connection line 105. This allows the battery management module 4 to monitor and manage the charging and discharging process of the battery module 2 through the fifth connection terminal 43 and the sixth connection terminal 44, ensuring the safe operation of the battery module 2. The positive terminal 101 and the negative terminal 102 are respectively connected to the external circuit through connection lines to realize the charging and discharging function of the battery device.
[0053] In one embodiment, one end of the series aluminum busbar 9 is electrically connected to the first connection end 411 via a first fastener, and the other end of the series aluminum busbar 9 is electrically connected to the third connection end 421 via a second fastener; one end of the first connecting line 103 is electrically connected to the second connection end 412 via a third fastener, and the other end of the first connecting line 103 is electrically connected to the positive terminal 101 disposed outside the housing 1 via a fourth fastener; one end of the second connecting line 104 is electrically connected to the fourth connection end 422 via a fifth fastener, and the other end of the second connecting line 104 is electrically connected to the fifth connection end 43 of the battery management module 4 via a sixth fastener; one end of the third connecting line 105 is electrically connected to the positive terminal of the battery management module 4 via a seventh fastener, and the other end of the third connecting line 105 is electrically connected to the negative terminal 102 outside the housing 1 via an eighth fastener.
[0054] In the above structure, fasteners securely connect each connection point to the series aluminum busbar and connecting wires, ensuring low impedance and high stability of current transmission. The battery management module 4 (BMS) monitors the voltage, current, and temperature of the battery module 2 via connecting wires and manages the temperature through the heating layer 3, ensuring that the battery module 2 operates within a safe range. Using fasteners ensures the mechanical stability and electrical contact reliability of each connection point, reducing the risk of loose connections or poor contact due to vibration or impact, and reducing the risk of short circuits or overheating due to poor contact, thus improving the safety of the battery device. Simultaneously, the fastener connection method ensures low impedance at the connection points, reducing energy loss, improving the overall efficiency of the battery device, and facilitating disassembly and reconnection. Maintenance personnel can quickly replace faulty components, reducing maintenance costs and time.
[0055] In one embodiment, both the first cell assembly 41 and the second cell assembly 42 include a plurality of individual cell cells arranged in an array, with a shock-absorbing layer provided between the individual cell cells.
[0056] In the above structure, both the first cell assembly 41 and the second cell assembly 42 are composed of several individual cell units. These individual cell units are arranged in a certain manner (such as side-by-side or in a matrix) to form a complete cell assembly. A damping layer is provided between adjacent cell units to absorb and buffer external impact forces, reducing collisions and vibrations between cell units. The damping layer can be made of flexible materials (such as silicone, sponge, rubber, etc.) or buffer fiber tape. These materials have good elasticity and buffering performance, and can effectively absorb vibration and impact forces.
[0057] In one embodiment, the battery device further includes a plurality of acquisition lines 106, one end of which is electrically connected to one of the battery cells via a seventh fastener, and the other end of which is electrically connected to the battery management module 4 via an eighth fastener.
[0058] In the above structure, the acquisition line 106 is used to collect key parameters such as voltage and temperature of each cell and transmit these data to the battery management module 4 (BMS) so that the battery management module 4 can accurately manage and protect the battery module 2. When abnormal conditions are detected (such as overvoltage, undervoltage, overtemperature, etc.), the battery management module 4 can take timely protective measures (such as cutting off the circuit, starting the cooling system, or issuing an alarm) to ensure the safe operation of the battery module 2.
[0059] In one embodiment, the housing 1 is also provided with a switch button 107, an aviation plug 108 and a waterproof and breathable valve 109, and the switch button 107 and the aviation plug 108 are electrically connected to the battery management module 4 respectively.
[0060] In the above structure, the switch button 107 is used to manually control the start and stop of the battery device, providing a direct user interface. The switch button 107 is electrically connected to the battery management module 4 (BMS) via a wire, and the battery management module 4 controls the operating mode of the battery device according to the state of the switch button 107. The aviation connector 108 is used to realize the electrical connection between the battery device and external devices (such as chargers, vehicles, or other electrical equipment). The aviation connector 108 has high reliability and good electrical performance, and is suitable for complex environments. The aviation connector 108 is electrically connected to the battery management module 4 (BMS) via a wire, and the battery management module 4 communicates and transmits power to external devices through the aviation connector 108. The waterproof vent valve 109 is used to balance the air pressure inside and outside the battery device, while preventing moisture from entering the battery device, ensuring the sealing and reliability of the battery device in humid environments. The waterproof vent valve 109 is usually installed on the side wall of the upper cover or lower housing of the casing 1 to ensure its normal operation. The user starts or stops the battery device by pressing the switch button 107, and the battery management module 4 controls the charging and discharging process of the battery module 2 according to the button signal. After the aviation connector 108 connects to the external device, the battery management module 4 communicates and transmits power to the external device through the connector to achieve charging or power supply functions. The waterproof and breathable valve 109 adjusts the internal air pressure manually or automatically during the operation of the battery device to prevent sealing problems caused by air pressure differences, and at the same time prevents moisture from entering the interior of the housing 1.
[0061] The technical solution of this application employs a heating layer 3 on the outer surface of the battery module 2, which can heat the battery module 2 under low-temperature conditions, maintaining its temperature within a preset range. This ensures normal internal operation of the battery module 2, improves the battery's charging and discharging performance in low-temperature environments, and effectively alleviates the problem of reduced driving range at low temperatures. A temperature detection module is located on the outer surface of the battery module 2, enabling real-time monitoring of its temperature. By electrically connecting the temperature detection module to both the battery module 2 and the heating layer 3, the operating state of the heating layer 3 can be controlled according to the actual temperature of the battery module 2, achieving temperature regulation and preventing overheating or underheating, further optimizing the low-temperature performance of the battery device.
[0062] This application also proposes an electric vehicle, which includes a battery device. The specific structure of the battery device is as described in the above embodiments. Since this electric vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0063] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. A battery device, characterized by, include: A housing, wherein the housing has an internal cavity; A battery module, wherein the battery module is disposed within the cavity; A heating layer is disposed on the outer surface of the battery module; A temperature detection module is provided on the outer surface of the battery module; The temperature detection module is electrically connected to both the battery module and the heating layer.
2. The battery device of claim 1, wherein The heating layer is disposed at least on opposite sides of the battery module; and / or, The battery device further includes a battery management module, which is electrically connected to the battery module, the temperature detection module and the heating layer.
3. The battery device of claim 2, wherein The second part also includes a plate, which is disposed between the inner wall of the housing and the battery module. Both ends of the plate are fixedly connected to the inner wall of the housing, and a mounting plate is provided on the side of the plate facing the inner wall of the housing. The battery management module is mounted on the mounting plate.
4. The battery device of claim 3, wherein The mounting plate is provided with a limiting groove, and the battery management module is located in the limiting groove. The battery management module is detachably connected to the limiting groove.
5. The battery device according to any one of claims 1 to 4, wherein An insulating layer is provided on the inner wall of the housing; and / or, A flame-retardant layer is provided on the inner bottom wall of the housing; and / or, The inner bottom wall of the shell is provided with a reinforcing beam structure around its perimeter; and / or, The outer surface of the housing is provided with a handle; and / or The housing includes a lower box and an upper cover, the lower box and the upper cover surrounding each other to form the cavity, and the lower box and the upper cover are detachably connected.
6. The battery device according to any one of claims 2 to 4, wherein The battery module includes a first cell assembly and a second cell assembly, with the heating layer provided between the first cell assembly and the second cell assembly; the first cell assembly and the second cell assembly are connected in series and electrically connected to the battery management module.
7. The battery device as claimed in claim 6, characterized in that, It also includes a series aluminum busbar. The first cell assembly has a first connection terminal and a second connection terminal. The second cell assembly has a third connection terminal and a fourth connection terminal. The first connection terminal is connected to the third connection terminal. One end of the series aluminum busbar is electrically connected to the first connection terminal, and the other end of the series aluminum busbar is electrically connected to the third connection terminal. The second connection terminal is electrically connected to the positive terminal of the battery device through a first connection line. The fourth connection terminal is electrically connected to the fifth connection terminal of the battery management module through a second connection line. The sixth connection terminal of the battery management module is electrically connected to the negative terminal of the battery management module through a third connection line.
8. The battery device of claim 7, wherein One end of the series aluminum busbar is electrically connected to the first connecting end via a first fastener, and the other end of the series aluminum busbar is electrically connected to the third connecting end via a second fastener; one end of the first connecting wire is electrically connected to the second connecting end via a third fastener, and the other end of the first connecting wire is electrically connected to the positive terminal disposed on the outside of the housing via a fourth fastener; one end of the second connecting wire is electrically connected to the fourth connecting end via a fifth fastener, and the other end of the second connecting wire is electrically connected to the fifth connecting end of the battery management module via a sixth fastener; one end of the third connecting wire is electrically connected to the positive terminal of the battery management module via a seventh fastener, and the other end of the third connecting wire is electrically connected to the negative terminal on the outside of the housing via an eighth fastener; and / or, Both the first battery cell assembly and the second battery cell assembly include a plurality of battery cell units arranged in an array, with a shock-absorbing layer provided between the battery cell units.
9. The battery device of claim 8, wherein, It also includes several acquisition lines, one end of which is electrically connected to one of the battery cells via a seventh fastener, and the other end of which is electrically connected to the battery management module via an eighth fastener; and / or, The housing is also equipped with a switch button, an aviation plug, and a waterproof and breathable valve. The switch button and the aviation plug are electrically connected to the battery management module, respectively.
10. An electric vehicle, characterized by comprising: Includes the battery device as described in any one of claims 1 to 9.