Battery structure and vehicle

Abstract

The utility model relates to the technical field of new energy, in particular to a battery structure and a vehicle. The battery structure comprises at least one battery cell assembly, at least one separator and at least one heating piece, and the battery cell assembly comprises a plurality of battery cell pieces which are sequentially arranged on the separator. A containing cavity is formed in the isolation piece and used for containing liquid. The heating piece is arranged on the side, away from the battery cell piece, of the isolation piece and transmits heat to the battery cell piece through the isolation piece, and the liquid is used for absorbing part of heat. According to the battery structure and the vehicle provided by the invention, the possibility that the local temperature of the battery core part is too high is reduced, and the liquid can flow in the accommodating cavity, so that heat can be uniformly distributed, and the temperature distribution in the battery structure is more uniform.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a battery structure and a vehicle. Background Art

[0002] With the development of new energy vehicles, electric heavy-duty trucks and electric light-duty trucks are becoming widely used. These electric vehicles require batteries. At low temperatures, the reaction rate within the battery decreases, increasing internal resistance and thus affecting battery performance. To maintain the battery within its optimal operating temperature range, it is often necessary to heat or cool it.

[0003] In the related art, a heating film is attached to the surface of the battery. When the temperature is low, the surface of the battery is heated by the heating film to increase the temperature of the battery.

[0004] However, the above heating method may cause the local temperature of the battery to be too high. Utility Model Content

[0005] The present application provides a battery structure and a vehicle to solve the problem of excessively high local battery temperature when the battery is heated.

[0006] In a first aspect, the present application provides a battery structure comprising at least one battery cell assembly, at least one isolating member and at least one heating member, wherein the battery cell assembly comprises a plurality of battery cells, and the plurality of battery cells are sequentially arranged on the isolating member.

[0007] The isolating piece has a receiving cavity therein, and the receiving cavity is used for receiving liquid.

[0008] The heating element is arranged on a side of the isolating element away from the battery core. The heating element transfers heat to the battery core through the isolating element, and the liquid is used to absorb part of the heat.

[0009] In one possible implementation, the battery structure provided in the present application further includes a water pump and a connecting pipe, wherein the connecting pipe connects the water pump and the accommodating chamber, and the water pump drives the liquid to circulate in the accommodating chamber and the connecting pipe.

[0010] In a possible implementation, the battery structure provided in the present application further includes an expansion kettle, which is connected to the water pump via a connecting pipe.

[0011] In one possible implementation, the battery structure provided in the present application further includes a heat exchanger, which is connected to the water pump via a connecting pipe.

[0012] In one possible implementation, the battery structure provided in the present application further includes a box body, and the battery cell assembly, the isolation member and the heating member are all arranged in the box body, and a first gap is formed between the heating member and the box body.

[0013] In a possible implementation, in the battery structure provided by the present application, both ends of the isolating member respectively have connecting ends, and the connecting ends are connected to the box body and extend to the outside of the box body.

[0014] In a possible implementation, the battery structure provided in the present application has at least two battery cell assemblies, each battery cell assembly is arranged in sequence and spaced apart in the vertical direction, and a second gap is provided between the battery cell assembly and the heating element located above.

[0015] In a possible implementation, the battery structure provided in the present application further includes thermally conductive adhesive, which is disposed between the isolation member and the battery core member.

[0016] In a possible implementation, in the battery structure provided by the present application, the heating element is a heating film, and the heating film is bonded to the isolation element.

[0017] In a second aspect, the present application provides a vehicle comprising a vehicle body and any one of the battery structures provided in the first aspect above, arranged on the vehicle body.

[0018] The present application provides a battery structure and a vehicle. The battery structure is provided with at least one battery cell assembly, at least one isolating member and at least one heating member. The battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are sequentially arranged on the isolating member. The heating member is arranged on the side of the isolating member away from the battery cell. The isolating member separates the battery cell from the heating member to avoid direct contact between the heating member and the battery cell, thereby reducing the possibility of excessively high temperatures in the local area of ​​the battery cell. The isolating member has a receiving cavity inside, which is used to hold liquid. The liquid can absorb part of the heat, further reducing the possibility of excessively high temperatures in the local area of ​​the battery cell. Moreover, the liquid can flow in the receiving cavity, which can evenly distribute the heat, prevent excessive heat concentration, and ensure a more uniform temperature distribution inside the battery structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of the battery structure provided in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100-battery cell assembly; 110-battery cell parts;

[0023] 200 - Isolation member; 210 - Accommodation cavity; 220 - Connection end;

[0024] 300-heating element;

[0025] 400-water pump;

[0026] 500-connecting pipe;

[0027] 600-Expansion kettle;

[0028] 700-heat exchanger;

[0029] 800-box body; 810-side panels; 820-box cover; 830-bottom panel;

[0030] 900-thermal conductive adhesive.

[0031] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0032] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art may adjust them as needed to suit specific applications.

[0033] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] Then, it should be noted that, in the description of this application, the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0036] As shown in the background art, in the related art, a heating film is attached to the surface of the battery. When the temperature is low, the surface of the battery is heated by the heating film to increase the temperature of the battery.

[0037] However, the above heating method may cause the local temperature of the battery to be too high.

[0038] Based on this, the battery structure and vehicle provided by the present application, the battery structure is provided with at least one battery cell assembly, at least one isolating member and at least one heating member, the battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are sequentially arranged on the isolating member. The heating member is arranged on the side of the isolating member away from the battery cell, and the isolating member separates the battery cell from the heating member to avoid direct contact between the heating member and the battery cell, thereby reducing the possibility of excessively high temperatures in the local area of ​​the battery cell. The isolating member has a accommodating cavity inside, which is used to accommodate liquid. The liquid can absorb part of the heat, further reducing the possibility of excessively high temperatures in the local area of ​​the battery cell. Moreover, the liquid can flow in the accommodating cavity, which can evenly distribute the heat, prevent excessive heat concentration, and ensure a more uniform temperature distribution inside the battery structure.

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] Figure 1 A schematic diagram of the battery structure provided in an embodiment of the present application.

[0041] Reference Figure 1 As shown, in the first aspect, the battery structure provided by the present application includes at least one battery cell assembly 100, at least one isolation member 200 and at least one heating member 300, the battery cell assembly 100 includes a plurality of battery cell members 110, and the plurality of battery cell members 110 are sequentially arranged on the isolation member 200.

[0042] The isolating member 200 has a receiving cavity 210 therein, and the receiving cavity 210 is used to receive liquid.

[0043] The heating element 300 is disposed on a side of the isolating element 200 facing away from the battery core 110 . The heating element 300 transfers heat to the battery core 110 through the isolating element 200 , and the liquid is used to absorb part of the heat.

[0044] The battery cell assembly 100 includes a plurality of battery cells 110. It can be understood that the battery cells 110 are an important part of the battery structure. The battery cells 110 store and release electrical energy through electrochemical reactions, thereby realizing the basic functions of the battery structure, namely, the storage and output of electrical energy.

[0045] The heating element 300 is used to provide heat to the battery cell 110 in a low temperature environment. The heat transfer of the heating element 300 can increase the operating temperature of the battery cell 110, thereby improving the performance of the battery structure in a low temperature environment and enhancing the discharge capacity and discharge efficiency of the battery structure.

[0046] A plurality of battery cells 110 are sequentially arranged on the isolation member 200. For example, the battery cells 110 can be connected to the isolation member 200 by bolts or by other means, and the embodiment of the present application does not impose too many restrictions on this.

[0047] It should be noted that the battery cell 110 is arranged on the isolation member 200, and the heating member 300 is arranged on the side of the isolation member 200 facing away from the battery cell 110, so that the isolation member 200 separates the battery cell 110 from the heating member 300. The isolation member 200 plays a role of heat conduction between the heating member 300 and the battery cell 110, ensuring that heat can be effectively transferred from the heating member 300 to the battery cell 110. At the same time, it also provides a certain degree of thermal isolation to avoid direct contact between the heating member 300 and the battery cell 110, thereby reducing the possibility of local excessive temperature of the battery cell 110 and protecting the battery cell 110 from overheating damage.

[0048] The separator 200 is provided with a chamber 210 for holding liquid. When the heater 300 transfers heat to the separator 200, the liquid in the separator 200 heats up, evaporating and boiling, turning into a gas that absorbs heat. This allows the liquid to absorb some of the heat. This absorption and transfer of heat helps regulate the temperature of the battery cell 110, further reducing the possibility of localized overheating of the battery cell 110. Furthermore, the ability of the liquid to flow within the chamber 210 evenly distributes heat, preventing excessive heat concentration and reducing temperature gradients within the battery structure, ensuring a more uniform temperature distribution within the battery structure.

[0049] By absorbing and conducting heat, the liquid helps maintain the temperature of the battery cell 110 within the optimal operating temperature range, preventing performance degradation or safety hazards caused by overheating of the battery cell 110. For example, the liquid can be an ethylene glycol aqueous solution. Ethylene glycol aqueous solution has excellent thermal conductivity and can effectively absorb and transfer heat. Ethylene glycol lowers the freezing point of water, making the solution less likely to freeze at low temperatures, thus preventing the liquid from freezing. The boiling point of ethylene glycol aqueous solution is higher than that of pure water. Under high temperature conditions, it can prevent the liquid from boiling and evaporating prematurely, ensuring system stability. Ethylene glycol aqueous solution also has excellent chemical stability and is not easily decomposed or deteriorated.

[0050] It is understandable that, compared to the prior art, pasting a heating film on the surface of the battery and heating the surface of the battery through the heating film may cause the local temperature of the battery to be too high. The battery structure provided in the embodiment of the present application separates the battery cell 110 from the heating element 300 through the isolating element 200 to avoid direct contact between the heating element 300 and the battery cell 110, thereby reducing the possibility of the local temperature of the battery cell 110 being too high. The isolating element 200 has a accommodating cavity 210 therein, which is used to accommodate liquid. The liquid can absorb part of the heat, further reducing the possibility of the local temperature of the battery cell 110 being too high. Moreover, the liquid can flow in the accommodating cavity 210, which can evenly distribute the heat, prevent the heat from being too concentrated, and ensure that the temperature distribution inside the battery structure is more uniform.

[0051] In some embodiments, reference Figure 1 As shown, the battery structure further includes a water pump 400 and a connecting pipe 500 . The connecting pipe 500 connects the water pump 400 with the accommodating chamber 210 . The water pump 400 drives the liquid to circulate in the accommodating chamber 210 and the connecting pipe 500 .

[0052] Specifically, the connecting pipe 500 connects the water pump 400 and the accommodating chamber 210 to form a closed circulation path. The connecting pipe 500 provides a flow channel for the liquid, and the water pump 400 drives the liquid to circulate in the accommodating chamber 210 and the connecting pipe 500. The circulating liquid can improve the efficiency of heat transfer and evenly distribute heat, further reducing the temperature gradient inside the battery structure, ensuring that the temperature of each battery cell 110 is more uniform, and improving the performance of the battery structure.

[0053] For example, the connecting pipe 500 may be a rubber tube or a pipe made of other materials, and the embodiments of the present application do not impose too many restrictions on this.

[0054] In some embodiments, reference Figure 1 As shown, the battery structure further includes an expansion water tank 600 , which is connected to the water pump 400 via a connecting pipe 500 .

[0055] It should be noted that since temperature changes can cause the volume of the liquid to expand or contract, the expansion kettle 600 provides a buffer space that can absorb and release the volume changes of the liquid, thereby regulating the pressure in the connecting pipe 500, preventing the pressure in the connecting pipe 500 from being too high, protecting the connecting pipe 500 and other components from damage due to pressure fluctuations, and improving the reliability and safety of the battery structure.

[0056] The expansion kettle 600 can store excess liquid and release it when needed to maintain the liquid level in the connecting pipe 500 and the accommodating chamber 210, ensuring that the connecting pipe 500 and the accommodating chamber 210 have enough liquid to circulate.

[0057] The expansion kettle 600 can also help remove bubbles in the liquid, prevent bubbles from forming air blockage in the connecting pipe 500, reduce the obstruction of bubbles to the flow of liquid, and ensure the circulation of the liquid.

[0058] In some embodiments, reference Figure 1 As shown, the battery structure further includes a heat exchanger 700 , which is connected to the water pump 400 via a connecting pipe 500 .

[0059] It should be noted that the heat exchanger 700 can effectively transfer the heat in the liquid to the external environment, thereby improving the heat dissipation efficiency, preventing the battery structure from overheating, and further helping to maintain the battery structure within an optimal operating temperature range.

[0060] Exemplarily, the heat exchanger 700 may be a plate heat exchanger 700, which realizes heat exchange between liquid and the external environment or other media through channels composed of multiple thin plates. Due to its efficient heat conduction capability, the plate heat exchanger 700 can quickly transfer excess heat from the battery system; it may also be other heat exchangers 700, and the embodiments of the present application do not impose too many restrictions on this.

[0061] In some embodiments, reference Figure 1 As shown, the battery structure further includes a box body 800 , the battery cell assembly 100 , the isolation member 200 and the heating member 300 are all arranged in the box body 800 , and a first gap is formed between the heating member 300 and the box body 800 .

[0062] It can be understood that by placing the battery cell assembly 100, the isolation member 200 and the heating member 300 in the box body 800, the box body 800 provides physical protection for the battery cell assembly 100, the isolation member 200 and the heating member 300, preventing damage to them caused by external environmental factors (such as dust, moisture and mechanical shock), thereby improving the durability and reliability of the battery structure.

[0063] In a specific implementation, the box body 800 may include side panels 810 , a box cover 820 and a bottom plate 830 . The bottom plate 830 may prevent the heating element 300 from being exposed, thereby protecting the heating element 300 .

[0064] There is a first gap between the heating element 300 and the box body 800 to avoid direct contact between the heating element 300 and the box body 800, thereby preventing the heating element 300 from causing damage to the box body 800.

[0065] In some embodiments, reference Figure 1 As shown, both ends of the isolation member 200 respectively have connection ends 220 , and the connection ends 220 are connected to the box body 800 and extend to the outside of the box body 800 .

[0066] In this way, the connection end 220 provides a stable connection point for the isolation member 200, firmly connecting the isolation member 200 to the box body 800, improving the structural stability of the isolation member 200, and preventing the isolation member 200 from shifting or vibrating during transportation or operation.

[0067] For example, the connection end 220 can be welded to the box body 800, or can be connected by threads, or can be connected in other ways, and the embodiments of the present application do not impose too many restrictions on this.

[0068] In some embodiments, reference Figure 1 As shown, there are at least two battery cell assemblies 100 , and the battery cell assemblies 100 are arranged in sequence and spaced apart along the vertical direction, with a second gap between the battery cell assemblies 100 and the heating element 300 located above.

[0069] The number of the battery cell assemblies 100 is at least two, which can increase the total capacity and energy density of the battery structure. For example, there can be two or more battery cell assemblies 100, and the embodiment of the present application does not impose too many restrictions on this.

[0070] At least two battery cell assemblies 100 are arranged at intervals in the vertical direction, which helps to evenly distribute the weight of the battery structure, improve the balance of the battery structure, and reduce overturning or vibration problems caused by unstable center of gravity.

[0071] A second gap is defined between the battery cell assembly 100 and the heating element 300 located above it, so as to prevent the battery cell assembly 100 from directly contacting the heating element 300 located above it, thereby preventing the battery cell assembly 100 from being locally overheated.

[0072] It should be noted that each battery cell assembly 100 is provided with a corresponding isolation member 200 and a heating member 300 . By adjusting the power and heating time of each heating member 300 , precise control of the heating process of the battery structure can be achieved.

[0073] In some embodiments, reference Figure 1 As shown, the battery structure further includes a thermally conductive adhesive 900 , which is disposed between the isolation member 200 and the battery core member 110 .

[0074] Thermally conductive adhesive 900 has excellent thermal conductivity and can effectively transfer heat from separator 200 to battery cell 110. Thermally conductive adhesive 900 can fill the small gaps between battery cell 110 and separator 200, further ensuring even heat distribution, reducing the formation of local hot spots, and ensuring a more uniform temperature across the battery structure.

[0075] The thermal conductive adhesive 900 can enhance the adhesion between the battery core 110 and the isolation member 200 to prevent displacement between the battery core 110 and the isolation member 200 .

[0076] The thermal conductive adhesive 900 has a certain degree of flexibility and can provide a mechanical buffer between the battery cell 110 and the isolation member 200 , absorb and relieve stress caused by thermal expansion or mechanical vibration, and protect the battery cell 110 and the isolation member 200 from damage.

[0077] In some embodiments, reference Figure 1 As shown, the heating element 300 is a heating film, and the heating film is bonded to the isolation element 200 .

[0078] It should be noted that the heating film is directly bonded to the isolation member 200, which reduces heat loss, improves heating efficiency, and reduces energy consumption. The bonding method of the heating film simplifies the installation process and is easy to replace and maintain.

[0079] In specific implementation, the heating film is connected to a power source, and the heating film can be operated at a low voltage, thereby reducing electrical safety risks and improving the safety of the battery structure.

[0080] It should also be noted that the heating film is made of high temperature resistant and corrosion resistant materials to ensure long-term stable operation.

[0081] In a second aspect, the present application provides a vehicle comprising a vehicle body and any one of the battery structures provided in the first aspect above, arranged on the vehicle body.

[0082] The specific structure and working mode of the battery structure are described in detail in the above embodiments and will not be repeated here.

[0083] It should be noted that the vehicles in the embodiments of the present application include but are not limited to electric cars, electric buses, electric trucks, and electric bicycles.

[0084] Those skilled in the art will appreciate that the battery structure and vehicle provided herein are provided with at least one battery cell assembly 100, at least one separator 200, and at least one heating element 300. The battery cell assembly 100 includes a plurality of battery cells 110, which are sequentially arranged on the separator 200. The heating element 300 is arranged on the side of the separator 200 facing away from the battery cells 110. The separator 200 separates the battery cells 110 from the heating element 300 to prevent direct contact between the heating element 300 and the battery cells 110, thereby reducing the possibility of local overheating of the battery cells 110. The separator 200 has a chamber 210 therein for containing liquid. The liquid can absorb some heat, further reducing the possibility of local overheating of the battery cells 110. Moreover, the liquid can flow within the chamber 210, evenly distributing heat, preventing excessive heat concentration, and ensuring a more uniform temperature distribution within the battery structure.

[0085] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] It will be understood that the various numerical numbers involved in the embodiments of the present application are merely distinctions for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0087] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A battery structure, characterized in that: The invention comprises at least one battery core assembly (100), at least one isolating member (200) and at least one heating member (300), wherein the battery core assembly (100) comprises a plurality of battery core members (110), and the plurality of battery core members (110) are sequentially arranged on the isolating member (200); The isolating member (200) has a receiving cavity (210) therein, and the receiving cavity (210) is used to receive liquid; The heating element (300) is arranged on a side of the isolating element (200) facing away from the battery core (110); the heating element (300) transfers heat to the battery core (110) through the isolating element (200); and the liquid is used to absorb part of the heat.

2. The battery structure according to claim 1, characterized in that: It also includes a water pump (400) and a connecting pipe (500), wherein the connecting pipe (500) connects the water pump (400) with the accommodating chamber (210), and the water pump (400) drives the liquid to circulate in the accommodating chamber (210) and the connecting pipe (500).

3. The battery structure according to claim 2, characterized in that: It also includes an expansion water pot (600), and the expansion water pot (600) is connected to the water pump (400) through the connecting pipe (500).

4. The battery structure according to claim 2, characterized in that: It also includes a heat exchanger (700), and the heat exchanger (700) is connected to the water pump (400) through the connecting pipe (500).

5. The battery structure according to any one of claims 1 to 4, characterized in that: The invention also includes a box (800), wherein the battery cell assembly (100), the isolation member (200) and the heating member (300) are all arranged in the box (800), and a first gap is provided between the heating member (300) and the box (800).

6. The battery structure according to claim 5, characterized in that: Both ends of the isolating member (200) respectively have connecting ends (220), and the connecting ends (220) are connected to the box body (800) and extend to the outside of the box body (800).

7. The battery structure according to any one of claims 1 to 4, characterized in that: The number of the battery core assemblies (100) is at least two, and the battery core assemblies (100) are arranged in sequence and spaced apart in a vertical direction, with a second gap being provided between the battery core assemblies (100) and the heating element (300) located above.

8. The battery structure according to any one of claims 1 to 4, characterized in that: It also includes heat-conducting glue (900), and the heat-conducting glue (900) is arranged between the isolation member (200) and the battery core member (110).

9. The battery structure according to any one of claims 1 to 4, characterized in that: The heating element (300) is a heating film, and the heating film is bonded to the isolation element (200).

10. A vehicle, characterized in that: The invention comprises a vehicle body and the battery structure according to any one of claims 1 to 9 arranged on the vehicle body.

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