Low-temperature preheating device for power battery of electric vehicle

Abstract

The utility model relates to the field of new energy automobiles, and discloses a low-temperature preheating device for a power battery of an electric vehicle, which comprises a battery pack, a radiating strip arranged at the top of the battery pack, a mounting plate arranged outside the battery pack, a heating shell arranged at the bottom of the battery pack, fixing plates arranged on two sides of the heating shell, and a motor arranged at one end of the heating shell. By means of uniform heating, aging acceleration caused by uneven temperature in the battery pack is avoided, the service life of a battery is effectively prolonged, the safety of the battery pack in the heating process is improved, the stability of the device is improved, mechanical impact in the using process is reduced, and the service life of the battery pack is prolonged. And the protection on the battery pack is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, and particularly relates to a low-temperature preheating device for an electric vehicle power battery. Background Technique

[0002] With the rapid development of electric vehicle technology, the power battery, as the core component of an electric vehicle, its performance and lifespan directly affect the overall performance and market acceptance of electric vehicles. However, in a low-temperature environment, the performance of the power battery will significantly decline, specifically manifested as a reduction in charging capacity, a decrease in discharge efficiency, and a shortening of the battery lifespan. To overcome the adverse effects of the low-temperature environment on the power battery, engineers have developed various low-temperature preheating devices.

[0003] Existing low-temperature preheating devices for electric vehicle power batteries face multiple challenges: First, uneven heating is a major problem of existing preheating devices. Due to the different positions and arrangements of individual batteries inside the battery pack, during the heating process, the temperature differences of batteries at different positions are relatively large. This uneven temperature distribution not only exacerbates the aging of the battery pack but may also cause performance differences between battery monomers, further shortening the overall lifespan of the battery pack. Second, complex structure is another significant drawback of existing preheating devices. To achieve comprehensive heating of the battery pack, many preheating devices adopt complex electronic control systems. This not only increases the manufacturing cost but also makes the device difficult to maintain and service. At the same time, the complex structure also increases the probability of failures, reducing the reliability and stability of the system. For this reason, we propose a low-temperature preheating device for an electric vehicle power battery. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a low-temperature preheating device for an electric vehicle power battery, which solves the above problems.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: A low-temperature preheating device for an electric vehicle power battery, including a battery pack, a heat dissipation strip is arranged on the top of the battery pack, a mounting plate is arranged outside the battery pack, a heating shell is arranged at the bottom of the battery pack, fixing plates are arranged on both sides of the heating shell, a motor is arranged at one end of the heating shell, and a heat equalizing device is arranged inside the heating shell.

[0008] Preferably, a plurality of the heat dissipation strips are arranged and evenly distributed on the top of the battery pack, the bottoms of the plurality of heat dissipation strips are respectively fixedly connected to the top of the battery pack, and the mounting plates are respectively fixedly connected to the outer diagonals of the battery pack.

[0009] Preferably, the top of the heating shell is fixedly connected to the bottom of the battery pack, the fixing plate is fixedly connected to the heating shell, and a reinforcing plate is fixedly connected to the bottom of the heating shell.

[0010] Preferably, the reinforcing plate is made of rubber.

[0011] Preferably, the motor is fixedly connected to the outside of the heating shell. Independent batteries and control boxes are provided at both ends of the motor. The independent batteries and the control boxes are respectively fixedly connected to the outer wall of the heating shell, and the independent batteries, the control boxes and the motor are electrically connected together.

[0012] Preferably, the heat equalizing device includes a threaded rod and a stabilizing rod. The two ends of the threaded rod are respectively rotatably connected to the inner wall of the heating shell. The output end of the motor extends into the heating shell and is hinged to the threaded rod. The stabilizing rod is arranged on both sides of the threaded rod, and the two ends of the stabilizing rod are respectively fixedly connected to the inner wall of the heating shell.

[0013] Preferably, the heat equalizing device further includes a first heating plate and a second heating plate. The first heating plate and the second heating plate are respectively arranged inside the heating shell. The first heating plate and the second heating plate are respectively slidably connected to the stabilizing rod. The bottom end inside the first heating plate is in positive threaded connection with the threaded rod, and the bottom end inside the second heating plate is in reverse threaded connection with the threaded rod.

[0014] Preferably, the tops of the first heating plate and the second heating plate are respectively attached to the bottom of the battery pack, and buffer strips are respectively fixedly connected to the opposite ends of the first heating plate and the second heating plate.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present utility model provides a low-temperature preheating device for an electric vehicle power battery, having the following beneficial effects:

[0017] 1. For this low-temperature preheating device for an electric vehicle power battery, by driving the threaded rod to rotate through the motor, the first heating plate and the second heating plate can move in opposite directions, so as to realize uniform heating of the bottom of the battery pack. This heat equalizing effect avoids the problems of accelerated aging of the battery pack and performance differences of individual batteries caused by uneven heating in the traditional preheating method, and effectively extends the overall service life of the battery pack.

[0018] 2. For this low-temperature preheating device for an electric vehicle power battery, the heat dissipation strips provided at the top can timely dissipate the heat that may accumulate at the top of the battery pack, preventing the occurrence of local overheating. This not only improves the safety of the battery pack during the heating process, but also ensures the uniformity of the internal temperature distribution of the battery pack, which helps to maintain the stable working state of the battery pack.

[0019] 3. For the low-temperature preheating device of the power battery of the electric vehicle, the use of the reinforcement plate enhances the stability of the entire device, enabling the device to withstand external impacts and vibrations during heating and driving, and further protecting the battery pack. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the reinforcement plate of the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the heat equalizing device of the present utility model;

[0023] Figure 4 It is a schematic structural diagram of the buffer strip of the present utility model.

[0024] In the figure: 1. Battery pack; 2. Heat dissipation strip; 3. Mounting plate; 4. Heating shell; 5. Fixed plate; 6. Reinforcement plate; 7. Independent battery; 8. Control box; 9. Motor; 10. Threaded rod; 11. Stabilizing rod; 12. First heating plate; 13. Second heating plate; 14. Buffer strip. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-4 , which includes a battery pack 1. A heat dissipation strip 2 is provided on the top of the battery pack 1. A mounting plate 3 is provided outside the battery pack 1. A heating shell 4 is provided at the bottom of the battery pack 1. Fixed plates 5 are provided on both sides of the heating shell 4. A motor 9 is provided at one end of the heating shell 4. A heat equalizing device is provided inside the heating shell 4. By uniformly heating, it avoids the accelerated aging caused by uneven temperature inside the battery pack, effectively extends the battery life, improves the safety of the battery pack during heating, and improves the stability of the device, reduces mechanical impacts during use, and enhances the protection of the battery pack.

[0027] Furthermore, multiple heat dissipation strips 2 are provided and are equally spaced on the top of the battery pack 1. The bottoms of the multiple heat dissipation strips 2 are respectively fixedly connected to the top of the battery pack 1. The mounting plates 3 are respectively fixedly connected to the outer diagonals of the battery pack 1.

[0028] Furthermore, the top of the heating shell 4 is fixedly connected to the bottom of the battery pack 1, the fixing plate 5 is fixedly connected to the heating shell 4, and a reinforcing plate 6 is fixedly connected to the bottom of the heating shell 4.

[0029] Furthermore, the reinforcing plate 6 is made of rubber. The reinforcing plate 6 is made of materials such as rubber and is located at the bottom of the heating shell 4, which not only enhances the stability of the entire device but also plays a certain buffering and shock-absorbing role to protect the battery pack 1 from the influence of external impacts.

[0030] Furthermore, the motor 9 is fixedly connected to the outside of the heating shell 4. Independent batteries 7 and a control box 8 are arranged at both ends of the motor 9. The independent batteries 7 and the control box 8 are respectively fixedly connected to the outer wall of the heating shell 4, and the independent batteries 7, the control box 8, and the motor 9 are electrically connected together.

[0031] Furthermore, the heat equalizing device includes a threaded rod 10 and a stabilizing rod 11. Both ends of the threaded rod 10 are respectively rotatably connected to the inner wall of the heating shell 4. The output end of the motor 9 extends into the heating shell 4 and is hinged to the threaded rod 10. The stabilizing rod 11 is arranged on both sides of the threaded rod 10, and both ends of the stabilizing rod 11 are respectively fixedly connected to the inner wall of the heating shell 4. When the battery pack 1 needs to be preheated in a low-temperature environment, the control box 8 starts the motor 9. The motor 9 drives the threaded rod 10 to rotate. Due to the positive and reverse thread designs at both ends of the threaded rod 10, the first heating plate 12 and the second heating plate 13 will move in opposite directions respectively. This movement mechanism ensures that the heating plates can more evenly contact the bottom of the battery pack 1, thereby achieving the heat equalizing effect on the bottom of the battery pack 1. At the same time, the heating elements inside the first heating plate 12 and the second heating plate 13 start to work to heat the battery pack 1 and raise the temperature of the battery pack to an appropriate working range.

[0032] Furthermore, the heat equalizing device further includes a first heating plate 12 and a second heating plate 13. The first heating plate 12 and the second heating plate 13 are respectively arranged inside the heating shell 4. The first heating plate 12 and the second heating plate 13 are respectively slidably connected to the stabilizing rod 11. The inner bottom end of the first heating plate 12 is connected to the threaded rod 10 with a positive thread, and the inner bottom end of the second heating plate 13 is connected to the threaded rod 10 with a reverse thread.

[0033] Furthermore, the tops of the first heating plate 12 and the second heating plate 13 are respectively attached to the bottom of the battery pack 1. Buffer strips 14 are respectively fixedly connected to the opposite ends of the first heating plate 12 and the second heating plate 13. When the heating plates move and contact the bottom of the battery pack, the buffer strips 14 can reduce the impact force at the moment of contact and further protect the safety of the battery pack.

[0034] Working principle: When the battery pack 1 needs to be preheated in a low-temperature environment, the control box 8 starts the motor 9. The motor 9 drives the threaded rod 10 to rotate. Since the two ends of the threaded rod 10 are designed with right-handed threads and left-handed threads respectively, the first heating plate 12 and the second heating plate 13 will move in opposite directions respectively. This movement mechanism ensures that the heating plates can contact the bottom of the battery pack 1 more evenly, thereby achieving the effect of uniform heat on the bottom of the battery pack 1. At the same time, the heating elements inside the first heating plate 12 and the second heating plate 13 start to work to heat the battery pack 1 and raise the temperature of the battery pack to an appropriate working range. During the heating process, the heat dissipation strips 2 are distributed on the top of the battery pack 1, which helps to dissipate the heat that may accumulate on the top of the battery pack, effectively avoiding local overheating and ensuring the uniformity of the overall temperature distribution of the battery pack. In addition, the reinforcement plate 6 is made of materials such as rubber and is located at the bottom of the heating shell 4, which not only enhances the stability of the entire device but also plays a certain buffering and shock-absorbing role to protect the battery pack 1 from the impact of the outside world. The buffer strips 14 are fixedly connected to the opposite ends of the first heating plate 12 and the second heating plate 13 respectively. When the heating plates move and contact the bottom of the battery pack, the buffer strips 14 can reduce the impact force at the moment of contact and further protect the safety of the battery pack. In summary, the entire device realizes the uniform heating and effective protection of the battery pack 1 through the coordinated work of parts such as the motor 9, the threaded rod 10, the first heating plate 12, the second heating plate 13, the heat dissipation strips 2, the reinforcement plate 6, and the buffer strips 14, combined with a simple mechanical structure and an electronic control system.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature preheating device for a power battery of an electric vehicle, comprising a battery pack (1), a heat dissipation strip (2) being arranged on the top of the battery pack (1), a mounting plate (3) being arranged outside the battery pack (1), a heating shell (4) being arranged on the bottom of the battery pack (1), fixing plates (5) being arranged on both sides of the heating shell (4), a motor (9) being arranged at one end of the heating shell (4), and a heat equalizing device being arranged inside the heating shell (4).

2. The low-temperature preheating device for electric vehicle power battery according to claim 1, characterized in that: The heat dissipation bars (2) are provided in plurality and are equidistantly distributed on the top of the battery pack (1); the bottoms of the plurality of heat dissipation bars (2) are respectively fixedly connected to the top of the battery pack (1); and the mounting plates (3) are respectively fixedly connected to the outer diagonals of the battery pack (1).

3. The low-temperature preheating device for electric vehicle power battery according to claim 1, characterized in that: The top of the heating shell (4) is fixedly connected to the bottom of the battery pack (1), the fixing plate (5) is fixedly connected to the heating shell (4), and the bottom of the heating shell (4) is fixedly connected with a reinforcing plate (6).

4. The low-temperature preheating device for electric vehicle power battery according to claim 3, characterized in that: The reinforcing plate (6) is made of rubber.

5. The low-temperature preheating device for electric vehicle power battery according to claim 1, characterized in that: The motor (9) is fixedly connected to the outside of the heating shell (4); an independent battery (7) and a control box (8) are provided at both ends of the motor (9); the independent battery (7) and the control box (8) are respectively fixedly connected to the outer wall of the heating shell (4); the independent battery (7) and the control box (8) as well as the motor (9) are electrically connected together.

6. The low-temperature preheating device for electric vehicle power battery according to claim 5, characterized in that: The heat equalizing device comprises a threaded rod (10) and a stabilizing rod (11), the two ends of the threaded rod (10) are respectively rotatably connected to the inner wall of the heating shell (4), the output end of the motor (9) extends to the inside of the heating shell (4) and is hinged to the threaded rod (10), the stabilizing rod (11) is arranged on both sides of the threaded rod (10), and the two ends of the stabilizing rod (11) are respectively fixedly connected to the inner wall of the heating shell (4).

7. The low-temperature preheating device for electric vehicle power battery according to claim 6, characterized in that: The heat equalizing device further comprises a first heating plate (12) and a second heating plate (13), the first heating plate (12) and the second heating plate (13) are respectively arranged inside the heating shell (4), the first heating plate (12) and the second heating plate (13) are respectively slidably connected to the stabilizing rod (11), the inner bottom end of the first heating plate (12) is connected to the threaded rod (10) by a positive thread, and the inner bottom end of the second heating plate (13) is connected to the threaded rod (10) by a reverse thread.

8. The low-temperature preheating device for electric vehicle power battery according to claim 7, characterized in that: The tops of the first heating plate (12) and the second heating plate (13) are respectively attached to the bottom of the battery pack (1), and the opposite ends of the first heating plate (12) and the second heating plate (13) are respectively fixedly connected with buffer strips (14).

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