Self-cooling automobile lithium battery structure

Abstract

The application discloses a self-cooling automobile lithium battery structure, and relates to the technical field of automobile lithium batteries. The self-cooling automobile lithium battery structure is used to solve the problem of uneven heat dissipation of existing square lithium batteries. The self-cooling automobile lithium battery structure comprises a shell, the shell is provided with a placing groove, a battery pack is fixedly connected in the placing groove, the shell is provided with cooling grooves which are distributed at intervals, two communication shells are fixedly connected to the shell, all the cooling grooves are communicated with the two communication shells, the two communication shells are respectively communicated with a water inlet and a water outlet of a cooling circulation mechanism, and the widths of the different cooling grooves gradually decrease from the middle part of the shell to the two sides. The battery pack is cooled by the cooling grooves which are distributed at intervals, and the widths of the cooling grooves gradually decrease from the middle part of the shell to the two sides, so that the heat dissipation effect of the middle part of the battery pack where heat accumulates is enhanced, the temperature of each part of the battery pack is more uniform, and the cooling efficiency of the cooling water is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive lithium battery technology, and more particularly to a self-cooling automotive lithium battery structure. Background Technology

[0002] Lithium batteries are rechargeable batteries that use lithium as the key active component. They work by storing and releasing electrical energy through the reversible migration (intercalation and deintercalation) of lithium ions between the positive and negative electrodes. The core characteristics of lithium batteries include: high energy density, low self-discharge rate, no memory effect, relatively high voltage, and rechargeability. Lithium batteries are classified by shape as: cylindrical batteries, prismatic batteries, and pouch batteries. Prismatic batteries are the most commonly used in electric vehicles.

[0003] When lithium batteries are used as a power source for electric vehicles, they generate a lot of heat due to rapid discharge. At this time, it is necessary to dissipate heat from the lithium batteries. Otherwise, the lithium batteries will be at risk of thermal runaway, which may lead to fire or even explosion. Since all parts of a square lithium battery will release heat, the temperature of the part closer to the center will be higher than that of the edge due to heat accumulation. Therefore, the center of a square lithium battery needs a stronger heat dissipation effect. Summary of the Invention

[0004] To overcome the shortcomings mentioned in the background art, the present invention provides a self-cooling automotive lithium battery structure.

[0005] The technical solution is as follows: A self-cooling automotive lithium battery structure includes a housing, the housing having a placement groove, a battery pack being fixedly connected in the placement groove, the housing having spaced-apart cooling grooves, and two connecting shells being fixedly connected to the housing. All the cooling grooves are connected to the two connecting shells, and the two connecting shells are respectively connected to the inlet and outlet of a cooling circulation mechanism. The width of the different cooling grooves decreases sequentially from the middle of the housing to both sides.

[0006] As a further preferred embodiment, the housing is provided with a mounting groove, in which spaced-apart swing plates are rotatably connected, and all the swing plates are jointly fixed with an anti-stab plate.

[0007] As a further preferred embodiment, the swing plate is slidably connected to a limiting post, a spring is provided between the limiting post and the adjacent swing plate, the housing is provided with spaced grooves, the number of grooves on the housing is the same as the number of limiting posts, and the limiting post is inserted into the adjacent groove to limit the adjacent swing plate.

[0008] As a further preferred embodiment, the housing is rotatably connected to a guide plate, and the housing is fixedly connected to an electric push rod, the telescopic end of which is rotatably and slidably connected to the guide plate.

[0009] As a further preferred embodiment, the housing is fixedly connected to spaced heat dissipation plates, which are located within the mounting groove.

[0010] As a further preferred embodiment, the heat dissipation plates located between two adjacent swing plates are jointly fixed with a connecting plate.

[0011] As a further preferred embodiment, the side of the puncture-resistant plate away from the housing is coated with a friction material.

[0012] As a further preferred embodiment, the guide plate is tilted to guide the airflow generated during vehicle movement.

[0013] As a further preferred embodiment, the oscillating plates are divided into several groups, with two oscillating plates in each group. The number of groups of oscillating plates is equal to the number of cooling tanks, and the interval between the two oscillating plates in different groups decreases sequentially from the middle of the housing to both sides.

[0014] As a further preferred embodiment, both the heat sink and the connecting plate are made of thermally conductive materials, while the swing plate is made of a rigid material.

[0015] The beneficial effects are as follows: The present invention dissipates heat from the battery pack by means of spaced cooling grooves, and the width of the spaced cooling grooves decreases from the middle of the shell to both sides, thereby enhancing the heat dissipation effect on the heat accumulation area in the middle of the battery pack, making the temperature of each part of the battery pack more uniform, and improving the cooling efficiency of the cooling water.

[0016] The stab-proof plate blocks the impact, thereby reducing the probability of the battery pack being impacted. Before the stab-proof plate breaks, the two adjacent swing plates rotate and clamp the impact, thereby increasing the resistance to the impact and further reducing the probability of the battery pack being impacted, thus protecting the battery pack.

[0017] When the cooling water is insufficient to dissipate heat from the battery pack, the guide plate is opened to utilize the airflow generated by the vehicle's movement to dissipate heat from the battery pack, thereby reducing the probability of overheating and protecting the battery pack. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the placement tank and cooling tank of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the guide plate and electric push rod of the present invention;

[0021] Figure 4This is a three-dimensional structural diagram of the housing, guide plate, and electric push rod of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the swing plate and anti-stab plate of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the heat sink and connecting plate of the present invention.

[0024] Wherein: 1-shell, 101-placement slot, 102-cooling slot, 103-mounting slot, 2-battery pack, 3-connecting shell, 4-swing plate, 5-anti-stab plate, 6-limiting post, 7-guide plate, 8-electric push rod, 9-heat dissipation plate, 10-connecting plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] This embodiment discloses a self-cooling automotive lithium battery structure for achieving uniform heat dissipation of square lithium batteries.

[0028] like Figures 1-3 As shown, the device includes a housing 1, which is installed at the bottom of the electric vehicle body. The housing 1 has a placement slot 101, in which a battery pack 2 is fixedly connected. The housing 1 has five equally spaced cooling slots 102. The longitudinal section of each cooling slot 102 is trapezoidal, with the base of the trapezoid closer to the battery pack 2 being longer than the base of the side farther from the battery pack 2. This increases the contact area between the cooling water and the heat source, reduces thermal resistance, and thus more effectively absorbs and removes heat. The housing 1 is fixedly connected to two connecting shells 3, and all the cooling slots 102 are connected to the two connecting shells 3. The two connecting shells 3 are respectively connected to the inlet and outlet of the cooling circulation mechanism. The cooling circulation mechanism is an existing device used to cool the cooling water and circulate it in the flow channel. It will not be described in detail here. The width of the five cooling slots 102 decreases from the middle to both sides of the housing 1, thereby providing a larger flow rate for the high-temperature parts of the battery pack 2 to meet the need for uniform heat dissipation of the battery pack 2.

[0029] When using this device, it is first installed under the vehicle. When the battery pack 2 generates too much heat and needs to be cooled, the cooling circulation device is activated. Cooling water flows from the cooling circulation device to the left connecting shell 3, and then flows from the left side to the right side of the five cooling slots 102. During this process, the cooling water exchanges heat with the battery pack 2 through the shell 1, carrying away the heat generated by the battery pack 2. After the heat exchange and temperature rise, the cooling water re-enters the cooling circulation device through the right connecting shell 3. During this process, the flow rate of cooling water entering the cooling slots 102 decreases from the middle to both sides, thereby providing a larger flow rate for the high-temperature parts to meet the need for uniform heat dissipation of the battery pack 2.

[0030] Example 2

[0031] This embodiment discloses a self-cooling automotive lithium battery structure, which, based on Embodiment 1, also has the function of preventing impact and puncture during vehicle operation.

[0032] like Figure 1 and Figures 3-6 As shown, a mounting groove 103 is provided on the lower side of the housing 1. Oscillating plates 4 are rotatably connected within the mounting groove 103. The oscillating plates 4 provide vertical compressive strength to the housing 1. All the oscillating plates 4 are fixedly connected to an anti-stab plate 5, which is made of elastic material. When the anti-stab plate 5 deforms, it pulls two adjacent oscillating plates 4 to rotate, causing the two adjacent oscillating plates 4 to clamp the impactor, thereby increasing the resistance to the impactor and reducing the probability of damage to the battery pack 2. The lower side of the anti-stab plate 5 is coated with a friction material. When the oscillating plates 4 clamp the impactor, the anti-stab plate 5 is sandwiched between them, further increasing the probability of successfully blocking the impactor by increasing the friction between the anti-stab plate 5 and the impactor.

[0033] like Figure 6 As shown, a limiting post 6 is slidably connected to the upper side of the swing plate 4. The limiting post 6 consists of a cylinder and a hemisphere. A spring is provided between the limiting post 6 and the adjacent swing plate 4. The spring is always in a compressed state, thereby providing resistance to the swing plate 4 and providing clamping force to the impacting object after the swing plate 4 rotates. The housing 1 is provided with grooves that are spaced apart. The depth of the grooves is less than the radius of the hemisphere of the limiting post 6, so that the limiting post 6 can slide out of the groove after being pushed. The number of grooves on the housing 1 is the same as the number of limiting posts 6. The limiting post 6 is inserted into the adjacent groove to limit the adjacent swing plate 4.

[0034] When a vehicle is in motion, if the wheels run over a stone or screw, the object may fly up, impacting the bottom of the vehicle. If the object strikes vertically onto the part of the stab-proof plate 5 directly opposite the swing plate 4, the swing plate 4 will not rotate because the impact force acts vertically on it. The swing plate 4 distributes the impact force evenly across the housing 1, thus improving its impact resistance and protecting the battery pack 2. When the object strikes the stab-proof plate 5 between two adjacent swing plates 4, the stab-proof plate 5 deforms and gradually buffers the impact force. When the impact force is small, the object will gradually stop moving under the protection of the stab-proof plate 5 and fall to the ground. Afterwards, the anti-stab plate 5 returns to its original shape under its own elasticity. When the impact force is large, as the deformation of the anti-stab plate 5 gradually increases, the deformed part of the anti-stab plate 5 pulls the swing plates 4 on both sides to rotate. The swing plates 4 drive the adjacent limiting post 6 to rotate. The limiting post 6 is squeezed by the adjacent groove on the housing 1. The limiting post 6 moves into the adjacent swing plate 4 and compresses the adjacent spring. When the limiting post 6 separates from the adjacent groove on the housing 1, the limiting post 6 moves outward under the push of the adjacent spring, so that the swing plate 4 continues to rotate until the two adjacent swing plates 4 clamp the impacting object, thereby reducing the probability of the impacting object moving further into the housing 1, so as to protect the battery pack 2.

[0035] Example 3

[0036] This embodiment discloses a self-cooling automotive lithium battery structure, which is a further improvement on Embodiment 2.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, a guide plate 7 is rotatably connected to the right side of the housing 1. When the housing 1 is installed on an electric vehicle, the right side of the housing 1 is close to the front of the vehicle. An electric push rod 8 is fixedly connected to the housing 1. The telescopic end of the electric push rod 8 is rotatably and slidably connected to the guide plate 7. The guide plate 7 is in an inclined state to guide the airflow generated during vehicle movement, thereby reducing wind resistance during vehicle movement.

[0038] When the heat generated by the battery pack 2 increases during the rapid movement of the vehicle, the electric push rod 8 is activated and drives the guide plate 7 to rotate through its telescopic end, so that the airflow generated by the vehicle movement enters the mounting groove 103. This airflow is used to carry away the heat of the housing 1, thereby improving the heat dissipation efficiency of the battery pack 2. When the heat generated by the battery pack 2 decreases, the telescopic end of the electric push rod 8 is shortened and drives the guide plate 7 to return to its original position. This tilted guide plate 7 is used to guide the airflow to reduce wind resistance.

[0039] Example 4

[0040] This embodiment discloses a self-cooling automotive lithium battery structure, which, based on Embodiment 3, provides it with further heat dissipation capabilities.

[0041] like Figure 5 and Figure 6 As shown, the housing 1 is fixed with spaced heat dissipation plates 9, which are located in the mounting groove 103. The heat dissipation plates 9 are used to increase the contact area between the housing 1 and the air, thereby improving the heat dissipation efficiency of the housing 1.

[0042] Example 5

[0043] This embodiment discloses a self-cooling automotive lithium battery structure, which improves the impact resistance of the heat sink 9 based on embodiment 4.

[0044] like Figure 5 and Figure 6 As shown, the heat dissipation plate 9 located between two adjacent swing plates 4 is fixedly connected to the connecting plate 10. When the impacting object punctures the anti-puncture plate 5 and enters the mounting groove 103, the heat dissipation plate 9 can still serve as a protection. The connecting plate 10 connects the heat dissipation plates 9 between two adjacent swing plates 4, so that the impact force of the impacting object is evenly distributed to all the heat dissipation plates 9 between the two adjacent swing plates 4, thereby improving the impact resistance of the heat dissipation plate 9.

[0045] Example 6

[0046] This embodiment discloses a self-cooling automotive lithium battery structure. Based on embodiment 2, the swing plate 4 transmits the impact force to the high-strength part of the housing 1 to ensure the integrity of the housing 1.

[0047] like Figure 5 As shown, the swing plate 4 is divided into five groups, with two swing plates in each group. The number of groups of swing plates 4 is equal to the number of cooling tanks 102. The interval between the two swing plates 4 in different groups decreases from the middle to the sides of the shell 1. That is, every two swing plates 4 correspond to one cooling tank 102, and the two swing plates 4 are located on the sides of adjacent cooling tanks 102, so that when the swing plate 4 is hit, the impact force will not be applied to the weak point of the shell 1.

[0048] Example 7

[0049] This embodiment discloses a self-cooling automotive lithium battery structure, which, based on embodiment 5, further defines the materials of the swing plate 4, heat sink 9, and connecting plate 10.

[0050] like Figure 5 and Figure 6 As shown, the heat sink 9 and the connecting plate 10 are both made of thermally conductive materials, such as copper, thereby improving the heat dissipation effect of the heat sink 9 and the connecting plate 10. The swing plate 4 is made of rigid materials, such as steel, thereby improving the impact resistance of the swing plate 4.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-cooled automotive lithium battery structure, characterized in that: The device includes a housing (1), which has a placement slot (101) and a battery pack (2) fixedly connected in the placement slot (101). The housing (1) has spaced cooling slots (102) and two connecting shells (3) fixedly connected to the housing (1). All the cooling slots (102) are connected to the two connecting shells (3). The two connecting shells (3) are connected to the inlet and outlet of the cooling circulation mechanism, respectively. The width of the different cooling slots (102) decreases from the middle to both sides of the housing (1). The housing (1) is provided with a mounting groove (103), and a spaced swing plate (4) is rotatably connected in the mounting groove (103). All the swing plates (4) are fixedly connected to an anti-stab plate (5). The swing plate (4) is slidably connected to the limiting post (6). A spring is provided between the limiting post (6) and the adjacent swing plate (4). The housing (1) is provided with grooves distributed at intervals. The number of grooves on the housing (1) is the same as the number of limiting posts (6). The limiting post (6) is inserted into the adjacent groove to limit the adjacent swing plate (4). The housing (1) is rotatably connected to a guide plate (7), and the housing (1) is fixedly connected to an electric push rod (8). The telescopic end of the electric push rod (8) is rotatably and slidably connected to the guide plate (7). The housing (1) is fixedly connected with spaced heat dissipation plates (9), which are located in the mounting groove (103); The heat dissipation plate (9) located between two adjacent swing plates (4) is fixedly connected to a connecting plate (10). The heat sink (9) and the connecting plate (10) are both made of thermally conductive materials, while the swing plate (4) is made of rigid materials.

2. The self-cooling automotive lithium battery structure according to claim 1, characterized in that: The side of the puncture-resistant plate (5) away from the housing (1) is coated with a friction material.

3. The self-cooled automotive lithium battery structure according to claim 1, characterized in that: The guide plate (7) is in an inclined state and is used to guide the airflow generated during vehicle movement.

4. The self-cooled automotive lithium battery structure according to claim 1, characterized in that: The swing plate (4) is divided into several groups, and each group of the swing plate (4) has two swing plates (4). The number of groups of the swing plate (4) is equal to the number of cooling tanks (102), and the interval between the two swing plates (4) in different groups decreases from the middle to both sides of the housing (1).

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