Heating device and battery pack

Abstract

The utility model relates to a heating device and a battery pack, and relates to the field of battery technology, the heating device is used for heating a battery module, the battery module comprises a plurality of batteries, the heating device comprises a plurality of heating films, the heating films are located between the adjacent batteries or on one side of the batteries, and the heating films are used for heating the battery module. The battery is attached to the heating films, and the plurality of heating films are electrically connected in series. Through the design that the heating films are arranged between the batteries or on one side of the batteries and attached to the batteries, the heating efficiency can be improved, the assemblability of the heating device is improved, the multiple heating films are electrically connected in series, uniform heating of the whole battery module can be achieved, it is ensured that the temperature difference between the batteries is small, and the battery module is more uniform. The stability and the safety of the system are further improved; the device is simple in design, does not need complex components and installation procedures, is easy to manufacture, assemble and maintain, and reduces the production cost at the same time.

Description

Technical Field

[0001] The present application relates to the field of battery technologies, and in particular, to a heating device and a battery pack. Background Art

[0002] With the increasing demand for high-performance and high-energy-density batteries, battery modules with a CTP structure have attracted much attention. The CTP structure is characterized by directly integrating battery cells into the battery module without additional modules, thereby improving the energy density and the efficiency of system integration.

[0003] However, compared with traditional battery modules, battery packs with a CTP structure face some challenges, one of which is the arrangement of the heating device. For low-rate scenarios, natural heat dissipation can be considered without an additional radiator. In this case, the heating device can be arranged at the bottom of the battery, but heat insulation treatment needs to be performed on the bottom to ensure the heating efficiency. However, this solution may sacrifice a certain heat dissipation efficiency.

[0004] In contrast, under high-rate operating conditions, since a large amount of heat is generated during high-rate charging and discharging of the battery, and traditional radiators are usually arranged at the bottom of the battery module, it is difficult to arrange the heating device at the bottom. If the heating device is directly arranged at the bottom, the heat may be transferred out through the bottom radiator, resulting in ineffective heating of the battery; large battery modules with liquid cooling and liquid heating are usually adopted under high-rate operating conditions. Although this design can more effectively control the temperature of the battery, its energy density is low, assembly is difficult, and the cost is high. Summary of the Utility Model

[0005] In order to solve the problems of difficult assembly and high cost of the heating device in the battery module with a CTP structure, the present application provides a heating device and a battery pack.

[0006] The heating device and the battery pack provided by the present application adopt the following technical solutions:

[0007] A heating device for heating a battery module, the battery module including a plurality of batteries, the heating device including a plurality of heating films, the heating films being located between adjacent batteries or on one side of the batteries, the batteries being attached to the heating films, and the plurality of heating films being electrically connected in series.

[0008] By adopting the above technical solutions, in the present application, by placing the heating film between or on one side of the batteries and arranging it in close contact with the batteries, the heating efficiency can be improved and the assemblability of the heating device can be enhanced; moreover, by electrically connecting multiple heating films in series, uniform heating of the entire battery module can be achieved, ensuring a small temperature difference between individual batteries, thereby improving the stability and safety of the system; the device design of the present application is simple, without the need for complex components and installation procedures, being easy to manufacture, assemble and maintain, while reducing the production cost; the present application can flexibly adjust the position and quantity of the heating films to adapt to battery modules of different sizes and shapes, and can be combined according to actual needs to achieve a customized heating solution. Meanwhile, the electrical series connection of the heating films also makes the control of the entire heating system more convenient, and the heating temperature can be controlled by adjusting the current to achieve accurate temperature control.

[0009] In a specific feasible embodiment, the batteries form several groups of battery components, the heating films form several groups of heating components, and the heating components between adjacent battery components are electrically connected in series through a connecting piece to form a loop.

[0010] By adopting the above technical solutions, since the heating components correspond to the battery components one by one and are connected in series through a connecting piece to form a loop, uniform heating of the entire battery component can be achieved, which helps to prevent performance problems of the battery due to uneven temperature, and improves the working efficiency and lifespan of the battery; organizing the batteries and heating films into multiple components and connecting them in series through a connecting piece can simplify the structure of the entire system. This design is easier to install and maintain, and provides better flexibility and scalability.

[0011] In a specific feasible embodiment, the connecting piece includes quick-connect terminals. The first and / or last heating film in the same group of heating components is provided with the quick-connect terminals, and the quick-connect terminals of adjacent two groups of heating components are plugged and matched to achieve electrical connection.

[0012] By adopting the above technical solutions, the use of quick-connect terminals makes the electrical connection between the heating films simpler and faster, without the need for complex wire connection steps, simplifies the assembly process of the heating system, and improves the convenience and efficiency of connection; moreover, the quick-connect terminals allow the connection and disconnection between adjacent heating components, which provides convenience for the maintenance and replacement of the system.

[0013] In a specific feasible embodiment, in the same group of heating components, adjacent heating films are connected through a conducting wire.

[0014] By adopting the above technical solution, compared with direct connection or other complex connection methods, the use of conductive wires can simplify the installation process of the heating film. The use of conductive wires can also provide a more flexible electrical connection method, allowing the distance or layout between the heating films to be adjusted according to needs, and ensuring the stability and reliability of the electrical connection.

[0015] In a specific feasible embodiment, it further includes an input terminal and an output terminal, and the input terminal and the output terminal are respectively connected to the input ends and output ends of several heating films.

[0016] By adopting the above technical solution, power is supplied to the heating film at the input end through the input terminal, and the output signal of the heating system is obtained from the heating film at the output end through the output terminal, so as to be able to control the input and output of the heating system, and thus the heating process can be controlled, and flexibility is provided to adapt to different application scenarios and requirements.

[0017] In a specific feasible embodiment, the heating films are arranged along the length direction or the thickness direction of the battery.

[0018] By adopting the above technical solution, arranging the heating films along the length direction can distribute heat more evenly, thereby improving the temperature control effect of the battery, which can prevent the battery from overheating, extend the service life of the battery, and improve its performance stability; arranging the heating films along the thickness direction of the battery, this layout can ensure the maximum contact area between the heating film and the battery, thereby improving the heating efficiency. By arranging the heating films along the thickness direction of the battery, a more uniform heating distribution can be achieved, effectively reducing heat loss, and maximizing energy utilization.

[0019] In a specific feasible embodiment, the heating film is adhesively connected to the battery.

[0020] By adopting the above technical solution, using the method of adhesive connection can ensure the fixed connection between the heating film and the battery, provide stable mechanical support and heat conduction, ensure the close fit between the heating film and the battery, prevent movement or swing during use, and thus can provide a stable heating effect and ensure the reliability of the device.

[0021] A battery pack includes a battery module, the battery module includes several batteries, and the battery pack has the heating device as described above.

[0022] By adopting the above technical solution, the battery pack of the present application can effectively improve the working performance of the battery and extend its service life by placing the heating film in the battery module. The heating film is placed between or on one side of the batteries and is arranged in close contact with the batteries, which improves the assemblability of the heating device and is applicable to different battery packs. Moreover, the series connection of the heating films ensures that the entire battery module can be uniformly heated, thereby improving the heating efficiency of the entire battery pack.

[0023] In a specific feasible embodiment, the battery pack includes a box body, the box body is provided with a receiving groove, the battery module and the heating device are received in the receiving groove, a radiator is provided at the bottom of the box body, and the radiator is arranged corresponding to the battery module.

[0024] By adopting the above technical solution, by using the radiator provided at the bottom of the box body and arranging the radiator corresponding to the battery module, it is beneficial to control the overall temperature of the battery pack and dissipate heat, ensuring the safe operation of the battery pack.

[0025] In a specific feasible embodiment, the box body is provided with an air outlet, and the air outlet is communicated with the receiving groove.

[0026] By adopting the above technical solution, by using the design that the box body is provided with an air outlet communicated with the receiving groove, the air outlet can facilitate the heat dissipation in the receiving groove, thereby being able to control the overall temperature of the battery pack and dissipate heat, and further ensuring the safe operation of the battery pack.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By placing the heating film between or on one side of the batteries and arranging it in close contact with the batteries, the heating efficiency can be improved, the assemblability of the heating device can be enhanced, and by electrically connecting multiple heating films in series, uniform heating of the entire battery module can be achieved, ensuring a small temperature difference between the batteries, thereby improving the stability and safety of the system;

[0029] 2. The device of the present application has a simple design, does not require complex components and installation procedures, is easy to manufacture, assemble and maintain, and reduces the production cost at the same time. Moreover, the position and quantity of the heating films can be flexibly adjusted to adapt to battery modules of different sizes and shapes, and can be combined according to actual needs to achieve a customized heating solution. At the same time, the electrical series connection of the heating films also makes the control of the entire heating system more convenient, and the heating temperature can be controlled by adjusting the current to achieve accurate temperature control;

[0030] 3. By placing the heating film in the battery module, the battery pack of the present application can effectively improve the working performance of the battery and extend its lifespan. The heating film is placed between or on one side of the batteries and is arranged in close contact with the batteries, improving the assemblability of the heating device and making it applicable to different battery packs. Moreover, the series connection of the heating films ensures that the entire battery module can be uniformly heated, thereby improving the heating efficiency of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram showing a single-group heating component in an embodiment of the present application.

[0032] Figure 2 FIG. is a schematic structural diagram showing a single-group heating component and a battery component in an embodiment of the present application.

[0033] Figure 3 FIG. is a schematic structural diagram showing a heating device in an embodiment of the present application.

[0034] Figure 4 FIG. is a schematic structural diagram showing a single-group heating device and a battery module in an embodiment of the present application.

[0035] Figure 5 FIG. is a schematic structural diagram showing a battery pack in an embodiment of the present application.

[0036] DESCRIPTION OF REFERENCE NUMERALS: 1, heating device; 2, battery pack; 3, heating film; 4, battery module; 41, battery component; 411, battery; 5, heating component; 6, connecting member; 61, quick-connect terminal; 7, conducting wire; 8, input terminal; 9, output terminal; 10, box body; 11, receiving groove; 12, radiator; 13, air vent; 14, notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following further describes the present application in detail Figures 1-5 in conjunction with the attached drawings.

[0038] Please refer to Figure 1 and Figure 2 As shown, an embodiment of the present application discloses a heating device 1 for heating a battery module 4. In this embodiment, the heating device 1 of the present application includes, but is not limited to, a battery pack 2 applied to a CTP structure, and the battery module 4 includes a plurality of batteries 411;

[0039] The heating device 1 includes a plurality of heating films 3. In this embodiment, the heating films 3 include, but are not limited to, polyimide films, polyethylene terephthalate films, silicone films, and conductive polymer films; the heating films 3 are located between adjacent batteries 411 or on one side of the batteries 411, the batteries 411 are arranged in close contact with the heating films 3, and the plurality of heating films 3 are electrically connected in series;

[0040] A plurality of heating films 3 are arranged along the length direction or the thickness direction of the battery 411. In this embodiment, the plurality of heating films 3 are arranged along the length direction of the battery 411. In this embodiment, each battery 411 is located between two heating films 3, and the heating film 3 is attached to the side wall in the thickness direction of the battery 411; In actual design, arranging the heating film 3 along the length direction can distribute heat more evenly, thereby improving the temperature control effect of the battery 411, which can prevent the battery 411 from overheating, extend the service life of the battery 411, and improve its performance stability; While arranging the heating film 3 along the thickness direction of the battery 411, this layout can ensure the maximum contact area between the heating film 3 and the battery 411, thereby improving the heating efficiency. By arranging the heating film 3 along the thickness direction of the battery 411, a more uniform heating distribution can be achieved, effectively reducing heat loss and maximizing energy utilization;

[0041] The heating film 3 is adhesively connected to the battery 411. In this embodiment, the heating film 3 and the battery 411 are connected by an adhesive. The adhesive includes but is not limited to silicone rubber. The silicone rubber has good high-temperature resistance and thermal conductivity, and also has good chemical stability, which is suitable for connecting the battery 411 and the heating film 3 working in a high-temperature environment; By means of adhesive connection, a fixed connection between the heating film 3 and the battery 411 can be ensured, preventing movement or swing during use, thereby providing a stable heating effect and ensuring the reliability of the device;

[0042] During actual use, the heating film 3 is placed between or on one side of the batteries 411 and is attached to the battery 411 through an adhesive. Two adjacent heating films 3 are electrically connected in series; This installation method is convenient and fast, and the fitting design can improve the heating efficiency, and it is not easy to occur external short circuits or other safety problems, ensuring the safe operation of the battery module 4; And electrically connecting a plurality of heating films 3 in series can achieve uniform heating of the entire battery module 4, ensuring a small temperature difference between each battery 411, thereby improving the stability and safety of the system;

[0043] Moreover, the heating device 1 of the present application has a simple design, does not require complex components and installation procedures, is easy to manufacture, assemble and maintain, and at the same time reduces production costs; The position and quantity of the heating film 3 can be flexibly adjusted to adapt to battery modules 4 of different sizes and shapes, and can be combined according to actual needs to achieve a customized heating solution. At the same time, the electrical series connection of the heating film 3 also makes the control of the entire heating system more convenient. The heating temperature can be controlled by adjusting the current to achieve accurate temperature control.

[0044] Please refer to Figure 3 and Figure 4As shown, the battery 411 forms several groups of battery assemblies 41. In this embodiment, the battery 411 forms 4 groups of battery assemblies 41. Three batteries 411 are arranged along the length direction to form a group of battery assemblies 41, and 4 groups of battery assemblies 41 are arranged along the thickness direction to form the battery module 4.

[0045] The heating film 3 forms several groups of heating assemblies 5. In this embodiment, the heating film 3 forms 4 groups of heating assemblies 5. Four batteries 411 are arranged along the length direction of the battery 411 to form a group of heating assemblies 5; in the same group of heating assemblies 5, adjacent heating films 3 are electrically connected by a conducting wire 7. Compared with direct connection or other complex connection methods, using the conducting wire 7 can simplify the installation process between the heating films 3. Using the conducting wire 7 can also provide a more flexible electrical connection method, can adjust the distance or layout between the heating films 3 according to needs, and can ensure the stability and reliability of the electrical connection.

[0046] In this embodiment, the heating film 3 is provided with a notch 14. Since the heating film 3 and the conducting wire 7 are connected by welding, the welding surface of the heating film 3 will bulge. To ensure good fitting between the heating film 3 and the battery 411, the bulging part of the heating film 3 needs to extend outward to form the notch 14.

[0047] The heating assemblies 5 between adjacent two groups of battery assemblies 41 are electrically connected in series through a connector 6 to form a loop; the connector 6 includes a quick-insert terminal 61. The first heating film 3 and / or the last heating film 3 in the same group of heating assemblies 5 are provided with quick-insert terminals 61. In this embodiment, the first heating film 3 and the last heating film 3 of the two groups of heating assemblies 5 in the middle are both provided with quick-insert terminals 61, and the last heating film 3 of the two groups of heating assemblies 5 on the outside is provided with a quick-insert terminal 61. Adjacent two groups of heating assemblies 5 are electrically connected through the insertion and cooperation of the quick-insert terminals 61; by organizing the batteries 411 and the heating films 3 into multiple components and connecting them in series through the connector 6, the structure of the entire system can be simplified. This design is easier to install and maintain, and provides better flexibility and scalability.

[0048] During the actual installation process, after each group of heating assemblies 5 and battery assemblies 41 are assembled, the insertion terminals of adjacent two groups of heating assemblies 5 are inserted and connected to complete the electrical series connection of the entire heating device 1 and form a loop; the use of the quick-insert terminal 61 eliminates the need for complex wire connection steps, simplifies the assembly process of the heating system, saves time and labor costs, improves the convenience and efficiency of connection, and provides a reliable electrical connection to ensure the stability of transmission; during this process, by connecting in series through the quick-insert terminal 61 to form a loop, uniform heating of the entire battery assembly 41 can be achieved, which helps prevent performance problems of the battery 411 due to uneven temperature and improves the working efficiency and lifespan of the battery 411.

[0049] The heating device 1 further includes an input terminal 8 and an output terminal 9. The input terminal 8 and the output terminal 9 are respectively connected to the input end and the output end of a plurality of heating films 3. Power is supplied to the input heating film 3 through the input terminal 8, and the output signal of the heating system is obtained from the output heating film 3 through the output terminal 9, so that it can be used to control the input and output of the heating system, thereby realizing the control of the heating process and providing flexibility to adapt to different application scenarios and requirements.

[0050] Please refer to Figure 5 As shown, the present application further provides a battery pack 2. In this embodiment, the battery pack 2 is a battery pack 2 with a CTP structure. The battery pack 2 includes a battery module 4. The battery module 4 includes a plurality of batteries 411. The battery pack 2 of the present application has the heating device 1 as described above. By placing the heating film 3 in the battery module 4, the working performance of the battery 411 can be effectively improved and its life can be extended. The heating film 3 is placed between or on one side of the batteries 411 and is attached to the batteries 411, improving the assemblability of the heating device 1 and being applicable to different battery packs 2. And the series connection of the heating films 3 ensures that the entire battery module 4 can be uniformly heated, thereby improving the heating efficiency of the entire battery pack 2.

[0051] The battery pack 2 further includes a box body 10. The box body 10 is provided with a receiving groove 11. The battery module 4 and the heating device 1 are received in the receiving groove 11. A radiator 12 is provided at the bottom of the box body 10. The radiator 12 is correspondingly arranged with the battery module 4. By using the radiator 12 provided at the bottom of the box body 10 and correspondingly arranging the radiator 12 with the battery module 4, it is beneficial to control the overall temperature of the battery pack 2 and dissipate heat, ensuring the safe operation of the battery pack 2.

[0052] The box body 10 is further provided with an air vent 13. The air vent 13 is communicated with the receiving groove 11. The design of the air vent 13 can facilitate the heat dissipation in the receiving groove 11, thereby being able to control the overall temperature of the battery pack 2 and dissipate heat, further ensuring the safe operation of the battery pack 2.

[0053] The implementation principle of the embodiment of the present application is as follows: During actual use, 4 groups of battery components 41 and heating components 5 are respectively assembled. The 4 heating films 3 are electrically connected in series through a conductive wire 7 to form a group of independent heating components 5. 3 batteries 411 are arranged in a row. Before the batteries 411 enter the box body 10, the heating film 3 is pasted on the side of the batteries 411 using an adhesive. The heating film 3 is placed on both sides or one side of each battery 411, that is, each battery 411 will be located between two heating films 3 and is attached to the battery 411 through an adhesive. After each group of heating components 5 and battery components 41 are assembled, they can be integrally sent into the receiving groove 11 of the box body 10 through a vacuum adsorption tooling.

[0054] After the four groups of heating components 5 and the battery component 41 are installed in the receiving groove 11 of the box body 10, the plug terminals of two adjacent groups of heating components 5 are plugged and connected, electrically connected in series and form a complete loop, completing the assembly of the heating device 1 and the battery module 4; this installation method is convenient and fast, can improve the heating efficiency, is not prone to external short circuits or other safety problems, ensures the safe operation of the battery module 4, and electrically connects multiple heating films 3 in series, which can realize uniform heating of the entire battery module 4, ensure that the temperature difference between each battery 411 is small, and further improve the stability and safety of the system;

[0055] The heating device 1 of the present application has a simple design, does not require complex components and installation procedures, is easy to manufacture, assemble and maintain, and at the same time reduces the production cost; the position and quantity of the heating film 3 can be flexibly adjusted to adapt to battery modules 4 of different sizes and shapes, and can be combined according to actual needs to achieve a customized heating solution. At the same time, the electrical series connection of the heating film 3 also makes the control of the entire heating system more convenient, and the heating temperature can be controlled by adjusting the current to achieve accurate temperature control.

[0056] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A heating device for heating a battery module, wherein the battery module comprises a plurality of batteries, characterized in that: The heating device includes a plurality of heating films, wherein the heating films are located between adjacent batteries or on one side of the batteries, the batteries are arranged in close contact with the heating films, and the plurality of heating films are electrically connected in series; the batteries form a plurality of battery assemblies, and the heating films form a plurality of heating assemblies, and the heating assemblies of adjacent battery assemblies are electrically connected in series through connectors to form a loop.

2. The heating device according to claim 1, characterized in that: The connecting piece includes a quick-plug terminal. The first heating film and / or the last heating film in the same group of heating components are provided with the quick-plug terminal. The quick-plug terminals of two adjacent groups of heating components are plugged in and matched to achieve electrical connection.

3. The heating device according to claim 1, characterized in that: In the same group of the heating components, adjacent heating films are connected by conductive wires.

4. The heating device according to claim 1, characterized in that: It also includes an input terminal and an output terminal, wherein the input terminal and the output terminal are respectively connected to the input end and the output end of a plurality of the heating films.

5. The heating device according to claim 1, characterized in that: The heating film is arranged along the length direction or thickness direction of the battery.

6. The heating device according to claim 1, characterized in that: The heating film is adhesively connected to the battery.

7. A battery pack, comprising a battery module, wherein the battery module comprises a plurality of batteries, characterized in that: The battery pack has a heating device as described in any one of claims 1 to 6.

8. The battery pack according to claim 7, characterized in that: The battery pack comprises a box body, the box body is provided with a receiving groove, the battery module and the heating device are accommodated in the receiving groove, and a radiator is provided at the bottom of the box body, and the radiator is arranged corresponding to the battery module.

9. The battery pack according to claim 8, characterized in that: The box body is provided with an air outlet, and the air outlet is communicated with the containing groove.

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