Battery cell protection component, battery pack, and vehicle

Abstract

The application discloses a kind of electric core protection components, battery pack and vehicle, the electric core protection components include main body, first protection part and second protection part, first protection part and second protection part are connected with main body respectively, first protection part is surrounded in the outer periphery of main body, first protection part extends along the width direction of main body, second protection part is arranged at the top of main body, and second protection part extends along the height direction of main body, first protection part is suitable for being connected with the pole of electric core, and second protection part is suitable for being installed between the aluminum bar of adjacent two electric cores.The electric core protection components of the application can reduce the risk of arc produced by electric core short circuit, improve the use safety of electric core.

Description

Technical Field

[0001] This invention belongs to the field of battery pack technology, specifically relating to a cell protection component, a battery pack, and a vehicle. Background Technology

[0002] After thermal runaway of the battery cell, the high-temperature molten material ejected accumulates and causes the battery cell terminals to shift upwards. Due to the uncertainty of thermal runaway ejection, the direction of the terminal movement is also uncertain. Consequently, the aluminum bars welded to the battery cell terminals will also shift, which may lead to the failure of the insulation withstand voltage between aluminum bars or between aluminum bars and battery cell housings of different columns, thus causing short circuit and arcing. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a battery cell protection component that can reduce the risk of arcing caused by a short circuit in the battery cell and improve the safety of battery cell use.

[0004] This invention also proposes a battery pack.

[0005] The present invention also proposes a vehicle.

[0006] The battery cell protection component of this invention includes: a main body; a first protective part and a second protective part, wherein the first protective part and the second protective part are respectively connected to the main body, the first protective part surrounds the outer periphery of the main body and extends along the width direction of the main body, the second protective part is disposed on the top of the main body and extends along the height direction of the main body, the first protective part is adapted to be connected to the terminal post of the battery cell, and the second protective part is adapted to be installed between the aluminum bars of two adjacent battery cells.

[0007] The battery cell protection component of this invention can reduce the risk of arcing caused by a short circuit in the battery cell and improve the safety of battery cell use.

[0008] In some embodiments, the cell protection component further includes a support portion located between the first protection portion and the second protection portion, the support portion being arranged at an angle.

[0009] In some embodiments, the cell protection component further includes a snap-fit ​​portion disposed at the bottom of the main body, the snap-fit ​​portion having claws for connecting the cell.

[0010] In some embodiments, the cross-sectional width of the claw gradually decreases from top to bottom.

[0011] In some embodiments, the distance between the bottom of the snap-fit ​​portion and the top of the second protective portion is A, and 10mm≤A≤20mm.

[0012] In some embodiments, the cell protection component further includes a reinforcing portion surrounding the outer peripheral surface of the body, the reinforcing portion being disposed between the first protection portion and the snap-fit ​​portion, and the reinforcing portion and the snap-fit ​​portion being spaced apart in the height direction of the body.

[0013] In some embodiments, the dimension of the reinforcing part in the width direction of the main body is B, and 2mm≤B≤4mm.

[0014] In some embodiments, the dimension of the first protective part in the width direction of the main body is C, and 15mm≤C≤30mm.

[0015] The battery pack of this invention includes: a plurality of battery cells arranged sequentially, each battery cell having a terminal post mounted thereon; and a battery cell protection component disposed between two adjacent battery cells, wherein the battery cell protection component is the battery cell protection component described in any of the above embodiments.

[0016] The vehicle of this invention includes the battery pack as described in the above embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the battery cell protection component according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the battery cell according to an embodiment of the present invention.

[0019] Figure 3 This is a partial cross-sectional view of the battery cell according to an embodiment of the present invention.

[0020] Figure label:

[0021] Battery cell protection component 100, battery cell 200, side cooling plate 300, limit plate 400.

[0022] Main body 1, first protective part 2, second protective part 3, support part 4, locking part 5, claw 51

[0023] Reinforcement section 6, pole column 7, aluminum bar 8. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figure 1 As shown, the battery cell protection component 100 of this embodiment includes a main body 1, a first protection part 2, and a second protection part 3. The first protection part 2 and the second protection part 3 are respectively connected to the main body 1. The first protection part 2 surrounds the outer periphery of the main body 1, and the first protection part 2 extends along the width direction of the main body 1 (e.g., along the width direction of the main body 1). Figure 1 Extending in the left-right direction shown, the second protective part 3 is provided on the top of the main body 1, and the second protective part 3 extends along the height direction of the main body 1 (as shown in the figure). Figure 1 Extending in the vertical direction shown, the first protective part 2 is adapted to be connected to the terminal post 7 of the battery cell 200, and the second protective part 3 is adapted to be installed between the aluminum bars 8 of two adjacent battery cells 200.

[0026] Specifically, such as Figure 1 and Figure 3 As shown, the cell protection component 100 is located on the shoulder of the cell 200. In other words, the cell protection component 100 is installed on the side where the aluminum bar 8 and the terminal post 7 of the two cells 200 are adjacent. The first protective part 2 and the second protective part 3 are arranged at intervals in the vertical direction. The first protective part 2 extends in the horizontal direction, and the second protective part 3 extends in the vertical direction. In the horizontal direction, the second protective part 3 is generally located in the middle of the first protective part 2. In other words, the second protective part 3 is spaced at the same distance from the two adjacent cells 200.

[0027] The lower end face of the first protective part 2 is flat, and the lower end face of the first protective part 2 is adapted to be connected to the upper end face of the terminal 7 of the battery cell 200. The first protective part 2 is located between the terminal 7 of the battery cell 200 and the aluminum bar 8. For example, the first protective part 2 is bonded to the battery cell 200. The second protective part 3 is located between the aluminum bars 8 of two adjacent battery cells 200.

[0028] For example, the first protective part 2, the second protective part 3 and the main body 1 are integrally molded. For example, the first protective part 2, the second protective part 3 and the main body 1 can be integrally injection molded.

[0029] It should be noted that the main body 1, the first protective part 2, and the second protective part 3 are arranged in the same direction as the battery cell 200 (e.g., ...). Figure 2 The dimensions of the main body 1 in the front and back directions shown are the same, and the dimension of the main body 1 in the arrangement direction of the cells 200 is greater than or equal to the sum of the widths of the multiple cells 200. That is, the multiple cells 200 can be protected by installing a cell protection component 100.

[0030] The battery cell protection component 100 of this embodiment of the invention is provided with a first protection part 2 connected to the terminal post 7. The first protection part 2 is provided between the terminal post 7 and the aluminum bar 8, which can isolate the heat transfer between the aluminum bar 8 and the battery cell 200 housing and reduce the risk of short circuit arcing. The second protection part 3 is provided between two adjacent battery cells 200, which can block the heat transfer between two adjacent battery cells 200 and reduce the risk of short circuit arcing between two adjacent battery cells 200, thereby improving the safety of the battery cell 200 in use.

[0031] In some embodiments, the cell protection component 100 further includes a support portion 4, which is located between the first protection portion 2 and the second protection portion 3, and the support portion 4 is arranged at an angle.

[0032] Specifically, such as Figure 1 As shown, the support part 4 extends in the vertical direction and is arranged at an angle in the vertical direction. The upper end of the support part 4 is connected to the second protective part 3, and the lower end of the support part 4 is connected to the first protective part 2. There can be multiple support parts 4, which are arranged at intervals along the circumference of the main body 1. For example, there can be two support parts 4, which are distributed on the left and right sides of the second protective part 3.

[0033] It should be noted that the dimensions of the support part 4 in the front-to-back direction are the same as those of the main body 1 in the front-to-back direction.

[0034] The battery cell protection component 100 of this embodiment of the invention can improve the support strength of the second protection part 3 by providing the support part 4, prevent the second protection part 3 from swaying left and right, and also increase the pressure between the first protection part 2 and the electrode post 7, thereby improving the stability of the contact between the first protection part 2 and the electrode post 7.

[0035] In some embodiments, the battery cell protection component 100 further includes a snap-fit ​​portion 5, which is located at the bottom of the main body 1 and has a snap-fit ​​claw 51 for connecting the battery cell.

[0036] Optionally, there may be multiple claws 51, which are arranged at intervals along the circumference of the main body 1.

[0037] Specifically, such as Figure 1 As shown, the latching part 5 is located below the first protective part 2, and multiple latches 51 are arranged at intervals along the circumference of the main body 1. For example, there can be two latches 51, which are distributed on the left and right sides of the main body 1. By providing the latching part 5, the connection efficiency between the cell protection component 100 and the cell 200 can be improved. Furthermore, after the cell 200 expands, the expanded cell 200 will squeeze the cell protection component 100, making the contact between the cell protection component 100 and the cell 200 tighter and improving the protective stability of the cell protection component 100 for the cell 200.

[0038] In some embodiments, the cross-sectional width of the claw 51 gradually decreases from top to bottom.

[0039] Specifically, such as Figure 1 As shown, the longitudinal section of the claw 51 is generally trapezoidal, and the outer wall of the claw 51 is inclined, which makes it easy for the claw 51 to be inserted into the gap between two adjacent cells 200, thereby improving the efficiency of the connection between the cell protection component 100 and the cell 200.

[0040] In some embodiments, the distance between the bottom of the snap-fit ​​portion 5 and the top of the second protective portion 3 is A, and 10mm≤A≤20mm.

[0041] Specifically, such as Figure 1 As shown, the distance between the bottom of the snap-fit ​​part 5 and the top of the second protective part 3 is A, which is the height of the cell protection component 100, and 10mm ≤ A ≤ 20mm. For example, A can be 10mm, 12mm, 15mm, 16.5mm, 18mm, 19mm, or 20mm. When the height of the cell protection component 100 is less than 10mm, it cannot effectively block the space between two adjacent cells 200. When the height of the cell protection component 100 is greater than 20mm, the cell protection component 100 is too tall, causing the second protective part 3 to bend, affecting the structural strength of the second protective part 3, and failing to form an effective barrier between the cells 200.

[0042] In some embodiments, the battery cell protection component 100 further includes a reinforcing portion 6, which surrounds the outer peripheral surface of the main body 1. The reinforcing portion 6 is disposed between the first protection portion 2 and the snap-fit ​​portion 5, and the reinforcing portion 6 and the snap-fit ​​portion 5 are arranged at intervals in the height direction of the main body 1.

[0043] Specifically, such as Figure 1 As shown, the reinforcing part 6 is located between the first protective part 2 and the snap-fit ​​part 5. The dimension of the reinforcing part 6 in the left-right direction is smaller than that of the first protective part 2. When the battery cell protection component 100 is installed on the battery cell 200, the outer wall surface of the reinforcing part 6 abuts against the shoulders of two adjacent battery cells 200, increasing the contact area between the main body 1 and the side wall of the battery cell 200, making the contact between the battery cell protection component 100 and the battery cell 200 more stable. Furthermore, by providing the reinforcing part 6, the structural strength of the main body 1 can be improved.

[0044] For example, the reinforcing part 6 is integrally formed with the main body 1, which improves the structural stability of the reinforcing part 6.

[0045] In some embodiments, the dimension of the reinforcing part 6 in the width direction of the main body 1 is B, and 2mm≤B≤4mm.

[0046] Specifically, such as Figure 1As shown, the dimension of the reinforcing part 6 in the left-right direction is B, and 2mm≤B≤4mm. For example, B can be 2mm, 2.5mm, 3mm, or 4mm. When the dimension of the reinforcing part 6 in the left-right direction is too small, the outer wall of the reinforcing part 6 cannot contact the side wall of the battery cell 200, thus failing to enhance the connection stability between the battery cell protection component 100 and the battery cell 200. When the dimension of the reinforcing part 6 in the left-right direction is too large, the snap-fit ​​part 5 cannot abut against the battery cell 200, and the connection between the reinforcing part 6 and the side wall of the battery cell 200 is only achieved, affecting the connection strength between the battery cell protection component 100 and the battery cell 200.

[0047] In some embodiments, the dimension of the first protective part 2 in the width direction of the main body 1 is C, and 15mm≤C≤30mm.

[0048] Specifically, such as Figure 1 As shown, the dimension of the first protective part 2 in the left-right direction is C, and 15mm≤C≤30mm. For example, C can be 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, or 30mm. When the dimension of the first protective part 2 in the left-right direction is too large, the first protective part 2 is prone to bending after the cell protection component 100 is installed between the cell 200, resulting in a reduction in the contact area between the first protective part 2 and the terminal 7, thereby affecting the connection stability between the first protective part 2 and the terminal 7. When the dimension of the first protective part 2 in the left-right direction is too small, the contact area between the first protective part 2 and the terminal 7 is reduced, resulting in the shoulder of the terminal 7 being exposed and failing to provide protection.

[0049] The battery pack of this invention includes a plurality of battery cells 200 and a battery cell protection component 100. The plurality of battery cells 200 are arranged in sequence, and a terminal post 7 is installed on the battery cell 200. The battery cell protection component 100 is disposed between two adjacent battery cells 200. The battery cell protection component 100 is the battery cell protection component 100 of any of the above embodiments.

[0050] Specifically, such as Figure 2 and Figure 3 As shown, multiple battery cells 200 are divided into multiple groups of battery cells 200 in the left-right direction. Each group of battery cells 200 contains the same number of battery cells 200, and the battery cells 200 in each group of battery cells 200 are arranged in the front-back direction. The battery cell protection component 100 can be located between two adjacent battery cells 200 in each group of battery cells 200, or the battery cell protection component 100 can be located between two adjacent groups of battery cells 200.

[0051] The battery pack also includes a side cooling plate 300, which is located between two sets of battery cells 200. The battery cell protection component 100 is located above the side cooling plate 300, and the lower end face of the snap-fit ​​part 5 abuts against the side cooling plate 300.

[0052] The battery pack also includes a limiting plate 400, which covers the top of the battery cell 200. The top of the second protective part 3 abuts against the lower end face of the limiting plate 400. By setting the limiting plate 400, the connection strength between the battery cell protective part 100 and the battery cell 200 can be strengthened.

[0053] The vehicle of this invention includes the battery pack as described in the above embodiments.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A battery cell protection component, characterized in that, include: main body; A first protective part and a second protective part are respectively connected to the main body. The first protective part surrounds the outer periphery of the main body and extends along the width direction of the main body. The second protective part is disposed on the top of the main body and extends along the height direction of the main body. The first protective part is adapted to be connected to the terminal of the battery cell, and the second protective part is adapted to be installed between the aluminum bars of two adjacent battery cells. The reinforcement and the snap-fit ​​portion are arranged together. The reinforcement surrounds the outer peripheral surface of the main body and is disposed between the first protective portion and the snap-fit ​​portion. The reinforcement and the snap-fit ​​portion are arranged at intervals in the height direction of the main body. The outer wall surface of the reinforcement is adapted to abut against the shoulders of two adjacent battery cells.

2. The cell protection component according to claim 1, characterized in that, It also includes a support portion located between the first protective portion and the second protective portion, the support portion being arranged at an angle.

3. The cell protection component according to claim 1, characterized in that, The snap-fit ​​part is located at the bottom of the main body, and the snap-fit ​​part is provided with a snap claw for connecting the battery cell.

4. The cell protection component according to claim 3, characterized in that, The cross-sectional width of the chuck gradually decreases from top to bottom.

5. The cell protection component according to claim 3, characterized in that, The distance between the bottom of the snap-fit ​​part and the top of the second protective part is A, and 10mm≤A≤20mm.

6. The cell protection component according to claim 5, characterized in that, The dimension of the reinforcing part in the width direction of the main body is B, and 2mm≤B≤4mm.

7. The cell protection component according to claim 1, characterized in that, The first protective part has a dimension C in the width direction of the main body, and 15mm≤C≤30mm.

8. A battery pack, characterized in that, include: Multiple battery cells are arranged sequentially, and each battery cell is equipped with a terminal post. And the cell protection component according to any one of claims 1-7, wherein the cell protection component is disposed between two adjacent cells.

9. A vehicle, characterized in that, Includes the battery pack as described in claim 8.

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