Power battery pack with heating function

Abstract

The invention discloses a power battery pack with a heating function, which comprises a battery pack, a combustion heater, a heat exchanger, a heat exchanger embedded in the battery pack, a circulating medium pipeline, a temperature controller and a pump, and is characterized in that the heat exchanger embedded in the battery pack is connected with the combustion heater and the heat exchanger through the circulating medium pipeline; the heat exchanger is used for receiving and transferring heat to the battery pack; the temperature controller comprises a temperature sensor and a controller, and the temperature sensor is connected with the battery pack; the controller is respectively connected with the temperature sensor, the combustion heater and the heat exchanger; the pump is connected with the circulating medium pipeline. Therefore, a proper temperature is created for the power battery, the problem of performance reduction caused by a cold environment is solved, the efficiency of the battery is improved, the service life of the battery is prolonged, development of a new energy automobile is promoted, the battery is protected, heat can be supplied to the interior of the automobile, driving comfort in cold weather is guaranteed, the used combustion heater is efficient and environmentally friendly, and fuel consumption and pollution emission are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries for new energy vehicles, and in particular to a power battery pack with heating. Background Art

[0002] At present, the performance of both lithium iron phosphate and ternary lithium batteries will be greatly reduced in low temperature environments, the capacity will be significantly reduced, and the battery life will be seriously affected. This technical bottleneck has seriously restricted the development and application of new energy vehicles, especially pure electric vehicles in cold areas. In low temperature conditions, the range of electric vehicles will be severely reduced, and drivers may not even dare to turn on the heater like they do when driving a fuel vehicle, which further limits the comfort and practicality of electric vehicles.

[0003] Traditional fuel vehicles rely mainly on waste heat from the engine for winter heating, which is both efficient and environmentally friendly. However, pure electric vehicles usually do not allow the battery to generate too much heat during operation in order to improve battery efficiency and reduce the risk of thermal runaway. In addition, the efficiency of generating heat from electricity is relatively low, so the heat generated by the three-electric system of pure electric vehicles is not enough to be effectively used for heating like the waste heat from the engine of a fuel vehicle. This makes pure electric vehicles face greater challenges in winter heating.

[0004] Therefore, how to create a suitable working environment temperature for power batteries to improve their performance and extend their service life has become a key technical issue that needs to be solved in the field of new energy vehicles. Solving this problem is of great significance to promoting the development and application of new energy vehicles in cold regions. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, the first purpose of this application is to provide a power battery pack with heating, which effectively solves the problem of performance degradation and capacity reduction of traditional batteries in cold environments by creating a suitable working environment temperature for the power battery, thereby significantly improving the battery efficiency and extending its service life, and further promoting the popularization and development of new energy vehicles.

[0007] The second object of the present application is to provide a power battery pack with heating, which not only provides a suitable working environment for the battery, but also provides heating for the vehicle interior at the same time, so that the driver and passengers can enjoy a comfortable driving experience even in cold weather.

[0008] The third purpose of the present application is to provide a power battery pack with heating. The fuel used by the combustion heater is highly efficient and is only used for heating and does not participate in power generation. This efficient energy conversion method reduces the consumption of fossil fuels while reducing pollutant emissions generated during the combustion process, which is beneficial to environmental protection.

[0009] To achieve the above-mentioned objectives, the first aspect embodiment of the present application proposes a heated power battery pack, comprising a battery pack, a combustion heater and a heat exchanger, a heat exchanger embedded in the battery pack, a circulating medium pipeline, a temperature controller and a pump, wherein the heat exchanger embedded in the battery pack is connected to the combustion heater and the heat exchanger through the circulating medium pipeline, for receiving and transferring heat to the battery pack; the temperature controller comprises a temperature sensor and a controller, wherein the temperature sensor is connected to the battery pack; the controller is respectively connected to the temperature sensor and the combustion heater and the heat exchanger; and the pump is connected to the circulating medium pipeline.

[0010] A heated power battery pack in an embodiment of the present application creates a suitable temperature for the power battery, solves the problem of performance degradation caused by cold environments, improves battery efficiency and life, and promotes the development of new energy vehicles. This technology not only protects the battery, but also provides heating for the interior of the vehicle to ensure comfortable driving in cold weather. The combustion heater used is efficient and environmentally friendly, reducing fuel consumption and pollution emissions.

[0011] In addition, the power battery pack with heating proposed in the present application may also have the following additional technical features:

[0012] In one embodiment of the present application, the combustion heater and the combustion heater in the heat exchanger can burn gasoline, kerosene, natural gas or other fuels that can be used for combustion.

[0013] In one embodiment of the present application, the temperature sensor is disposed in the battery pack.

[0014] In one embodiment of the present application, the pump forms a closed loop with the combustion heater and the heat exchanger, and the heat exchanger embedded in the battery pack through the circulating medium pipeline.

[0015] In one embodiment of the present application, a battery cooling system is also included, and the battery cooling system is connected to the circulating medium pipeline.

[0016] The advantages of this application compared with the existing technology are:

[0017] (1) By creating a suitable working environment temperature for power batteries, the problem of performance degradation and capacity reduction of traditional batteries in cold environments is effectively solved, thereby significantly improving battery efficiency and extending battery life, further promoting the popularization and development of new energy vehicles.

[0018] (2) It not only provides a suitable working environment for the battery, but also provides heating for the vehicle interior, allowing the driver and passengers to enjoy a comfortable driving experience even in cold weather.

[0019] (3) The fuel used by the combustion heater is highly efficient and is only used for heating, not for generating power. This efficient energy conversion method reduces the consumption of fossil fuels while reducing pollutant emissions generated during the combustion process, which is beneficial to environmental protection.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a three-dimensional diagram of a power battery pack with heating according to an embodiment of the present application;

[0023] Figure 2 is a three-dimensional diagram of a power battery pack with heating according to another embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of a planar structure of a power battery pack with heating according to an embodiment of the present application;

[0025] Figure 4 This is a control connection diagram of a power battery pack with heating according to an embodiment of the present application;

[0026] Figure 5 The figure is a schematic diagram of the connection structure of a power battery pack with heating according to an embodiment of the present application.

[0027] As shown in the figure: 1. Battery pack; 2. Combustion heater and heat exchanger; 3. Heat exchanger embedded in the battery pack; 4. Circulating medium pipeline; 5. Temperature controller; 6. Pump; 7. Battery cooling system; 51. Temperature sensor; 52. Controller. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0029] A power battery pack with heating according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0030] like Figure 1-Figure 5 As shown, a power battery pack with heating according to an embodiment of the present application may include a battery pack 1, a combustion heater and a heat exchanger 2, a heat exchanger 3 embedded in the battery pack, a circulating medium pipeline 4, a temperature controller 5 and a pump 6, wherein the heat exchanger 3 embedded in the battery pack is connected to the combustion heater and the heat exchanger 2 through the circulating medium pipeline 4, and is used to receive and transfer heat to the battery pack 1, and the temperature controller 5 includes a temperature sensor 51 and a controller 52, wherein the temperature sensor 51 is connected to the battery pack 1, the controller 52 is respectively connected to the temperature sensor 51 and the combustion heater and the heat exchanger 2, and the pump 6 is connected to the circulating medium pipeline 4.

[0031] It is understandable that the battery pack 1 is the core part of the power battery pack, which is used to store and provide electrical energy. In a low temperature environment, the performance of the battery pack 1 may be affected, so it is necessary to heat it to keep its operating temperature within a suitable range.

[0032] The combustion heater and heat exchanger 2 is a combined device, including a combustion heater and a heat exchanger. The combustion heater generates heat through combustion, and the heat is transferred to the circulating medium through the heat exchanger. The circulating medium then transfers the heat to the battery pack 1 to achieve a heating effect.

[0033] Heat exchanger 3 embedded in battery pack: The heat exchanger is directly embedded in the battery pack 1 and is in close contact with the battery pack 1. Its function is to receive heat from the circulating medium and transfer the heat to the battery pack 1 evenly to ensure that the overall temperature of the battery pack 1 rises evenly.

[0034] The circulating medium pipeline 4 is used to connect the combustion heater and heat exchanger 2 and the heat exchanger 3 embedded in the battery pack. The circulating medium (water) flows in the pipeline to transfer heat from the combustion heater and heat exchanger 2 to the heat exchanger in the battery pack 1.

[0035] The temperature controller 5 includes two parts: a temperature sensor 51 and a controller 52 .

[0036] The temperature sensor 51 is connected to the battery pack 1 and is used to monitor the temperature of the battery pack in real time.

[0037] The controller 52 is connected to the temperature sensor 51 and the combustion heater and heat exchanger 2 respectively. It controls the heating power of the combustion heater and heat exchanger 2 according to the data provided by the temperature sensor 51 to adjust the temperature of the battery pack 1.

[0038] It should be noted that the controller 52 described in this embodiment is a single chip microcomputer, which is a highly integrated microcontroller that includes key components such as a processor, a memory, and an input and output interface, and can execute complex control algorithms and logical judgments.

[0039] The pump 6 is connected to the circulating medium pipeline 4 and is used to drive the circulating medium to flow in the pipeline. Through the action of the pump 6, the circulating medium can continuously flow from the combustion heater and heat exchanger 2 to the heat exchanger 3 embedded in the battery pack, and then flow back to the combustion heater and heat exchanger 2, forming a complete circulation loop.

[0040] Working principle:

[0041] When the temperature of the battery pack 1 is lower than a set value, the temperature sensor 51 transmits a signal to the controller 52 .

[0042] The controller 52 starts the combustion heater, the heat exchanger 2 and the pump 6 according to the received signal.

[0043] The combustion heater generates heat which is transferred to the circulating medium through the heat exchanger.

[0044] Driven by the pump 6 , the circulating medium flows along the circulating medium pipe 4 , transferring heat to the heat exchanger 3 embedded in the battery pack.

[0045] The heat exchanger 3 transfers heat to the battery pack 1 evenly, raising the temperature of the battery pack.

[0046] When the temperature of the battery pack 1 reaches the set value, the controller 52 turns off the combustion heater, the heat exchanger 2 and the pump 6, and stops the heating process.

[0047] In one embodiment of the present application, Figure 1-Figure 5 As shown, the combustion heater in the combustion heater and heat exchanger 2 can burn gasoline, kerosene, natural gas or other fuels that can be used for combustion.

[0048] It is understood that the combustion heater can burn gasoline, kerosene, natural gas or other fuels that can be used as combustion. This diversity provides users with more choices and flexibility, and can be selected based on factors such as local fuel supply, cost-effectiveness analysis, and environmental protection requirements.

[0049] It should be noted that fossil fuels are used as fuel for heating, not for generating power. Therefore, this does not violate the core definition of new energy vehicles, which is to use non-fossil energy as a power source.

[0050] Fuel efficiency: When gasoline is used for combustion heating, its efficiency is nearly nine times that of electric heating. This shows that fossil fuels are much more efficient than electric heating for this specific purpose of heating. Therefore, from an energy efficiency perspective, using fossil fuels for heating makes sense.

[0051] Current status of low temperature technology: At present, low temperature technology for power batteries has not yet been commercialized and mature, so creating a suitable ambient temperature for the battery has become a practical solution. By burning a small amount of fossil fuels for heating, the working efficiency and performance of the battery in a low temperature environment can be significantly improved.

[0052] Environmental protection and energy saving: Although the present invention uses fossil fuels for heating, from the perspective of overall environmental protection and energy saving, by burning a small amount of fossil fuels in exchange for more pure electric vehicles to replace fuel vehicles, it generally saves fossil fuel consumption and reduces air pollution.

[0053] Expansion of automobile functions: Automobiles can be regarded as mobile houses. With the development of economy and the increase of people working and staying time in automobiles, it is a normal demand to provide heating facilities in automobiles. This change of cognition and concept helps us better understand the role and significance of the combustion heater in the present invention.

[0054] In one embodiment of the present application, Figure 1 and Figure 4 As shown, the temperature sensor 51 is disposed in the battery pack 1 .

[0055] It is understandable that the temperature sensor 51 is carefully arranged inside the battery pack 1. This means that it is directly in the working environment of the battery pack and can very accurately capture the temperature changes inside the battery pack. This arrangement ensures that the temperature data measured by the temperature sensor 51 can truly reflect the working state of the battery pack, thereby improving the accuracy and reliability of temperature control.

[0056] In one embodiment of the present application, Figure 1-Figure 5 As shown, the pump 6 forms a closed loop through the circulating medium pipeline 4, the combustion heater and the heat exchanger 2, and the heat exchanger 3 embedded in the battery pack.

[0057] It can be understood that the pump 6, as a power source, extracts the circulating medium (such as cooling water) from the heat exchanger 3 embedded in the battery pack through the circulating medium pipeline 4, and then sends it to the combustion heater and the heat exchanger 2 for heating. The heated circulating medium is sent back to the heat exchanger 3 embedded in the battery pack through the circulating medium pipeline 4 again, where it transfers heat to the battery pack, thereby achieving heating of the battery. Finally, the cooled circulating medium is extracted again by the pump 6, forming a complete closed loop.

[0058] The pump 6 serves as a power source and is responsible for driving the circulating medium to continuously flow in the closed loop to ensure that heat can be efficiently transferred.

[0059] The circulating medium pipeline 4 is a channel for the circulating medium to flow, which connects the combustion heater and heat exchanger 2 and the heat exchanger 3 embedded in the battery pack, ensuring the heat transfer path.

[0060] The combustion heater and the heat exchanger 2 are the main sources of heat. Heat is generated by burning fuel and transferred to the circulating medium to increase its temperature.

[0061] The heat exchanger 3 embedded in the battery pack is the end point of heat transfer. Here, the heated circulating medium transfers heat to the battery pack 1 to achieve battery heating. At the same time, the circulating medium is also cooled down and is ready to enter the pump 6 again for the next round of circulation.

[0062] In one embodiment of the present application, Figure 4 As shown, a battery cooling system 7 is also included, and the battery cooling system 7 is connected to the circulating medium pipeline 4.

[0063] It is understandable that the battery cooling system 7 is an independent cooling module, which is integrated with the thermal management system by being connected to the circulating medium pipeline 4. Specifically, the battery cooling system 7 may include one or more components such as coolers, radiators, fans, etc., which work together to remove the heat generated by the battery pack and discharge it to the external environment or reuse it through the circulating medium pipeline 4.

[0064] Functions of the battery cooling system 7:

[0065] Temperature control: The battery cooling system 7 can monitor the temperature of the battery pack 1 in real time and adjust the cooling intensity as needed to ensure that the battery pack 1 always operates within the optimal temperature range.

[0066] Improved safety: By promptly removing the heat generated by the battery pack 1, the battery cooling system 7 helps prevent safety hazards such as battery thermal runaway and fire caused by excessive temperature.

[0067] Prolonging battery life: Keeping the battery pack 1 operating at a suitable temperature can significantly reduce the battery degradation rate, thereby prolonging the battery life.

[0068] It should be noted that the control method of the present application can be automatically controlled by a controller, and the control method of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field, and the present application is mainly used to protect mechanical structures, so the present application will no longer explain the control method and circuit connection in detail.

[0069] It should be noted that this heated power battery pack is an integrated component designed specifically for pure electric vehicles and has been integrated into the vehicle architecture during the vehicle design phase. As part of the vehicle's electronic control system, its temperature control system does not require manual installation or operation by the owner or driver. The driver only needs to select "winter mode" to automatically start the battery heating function according to actual needs by the vehicle's electronic control system. This function is automatically activated when the ambient temperature is lower than the set threshold. Regardless of whether the battery is in a discharging or charging state, the burner will start working to ensure that the battery operates efficiently in a suitable temperature environment.

[0070] For the driver, a passenger car using this technology only needs to add fuel to the fuel bottle of the burner regularly, similar to refueling the vehicle. In addition, the heat transfer medium of the system has a moderate operating temperature, similar to engine coolant, and is only added when necessary, without frequent maintenance. This design not only improves the performance of pure electric vehicles in low temperature environments, but also simplifies the driver's operating process and enhances the overall convenience and safety of use.

[0071] In summary, a power battery pack with heating in an embodiment of the present application creates a suitable temperature for the power battery, solves the problem of performance degradation caused by cold environment, improves battery efficiency and life, and promotes the development of new energy vehicles. This technology not only protects the battery, but also provides heating for the interior of the car to ensure comfortable driving in cold weather. The combustion heater used is efficient and environmentally friendly, reducing fuel consumption and pollution emissions.

[0072] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A power battery pack with heating, characterized in that: The invention comprises a battery pack (1), a combustion heater and a heat exchanger (2), a heat exchanger (3) embedded in the battery pack, a circulating medium pipeline (4), a temperature controller (5) and a pump (6), wherein: The heat exchanger (3) embedded in the battery pack is connected to the combustion heater and the heat exchanger (2) via the circulating medium pipeline (4) for receiving and transferring heat to the battery pack (1); The temperature controller (5) comprises a temperature sensor (51) and a controller (52), wherein: The temperature sensor (51) is connected to the battery pack (1); The controller (52) is connected to the temperature sensor (51) and the combustion heater and heat exchanger (2) respectively; The pump (6) is connected to the circulating medium pipeline (4).

2. A power battery pack with heating according to claim 1, characterized in that: The combustion heater and the combustion heater in the heat exchanger (2) can burn gasoline, kerosene, natural gas or other fuels that can be used for combustion.

3. A power battery pack with heating according to claim 1, characterized in that: The temperature sensor (51) is arranged in the battery pack (1).

4. A power battery pack with heating according to claim 1, characterized in that: The pump (6) forms a closed loop with the combustion heater and heat exchanger (2) and the heat exchanger (3) embedded in the battery pack through the circulating medium pipeline (4).

5. The power battery pack with heating according to claim 1, characterized in that: It also includes a battery cooling system (7), and the battery cooling system (7) is connected to the circulating medium pipeline (4).

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