Output base, battery pack and vehicle

Abstract

The utility model discloses an output pole base, a battery pack and a vehicle, wherein the output pole base comprises a body and an elastic component, wherein the body and the elastic component are arranged along a first direction, and a side of the elastic component away from the body is connected to a fixing member on a battery box, and when the fixing member is deformed, the elastic component can be pushed to deform along the first direction. The output pole base provided by the utility model has the advantages of not synchronously displacing with the deforming parts of the battery box as the battery core expands, having a small pulling force on the output pole copper and aluminum row, and having a low risk of leakage of the battery pole.

Description

Technical Field

[0001] The utility model relates to vehicle technical advantages, and in particular to an output pole base, a battery pack and a vehicle. Background Art

[0002] In order to realize the electrical connection function between power battery modules, an output pole base is usually set at the front and rear ends of the module. The base has threaded holes, and the copper-aluminum bar of the module output pole and the bridging copper-aluminum bar between the modules can be fixed to the output pole base by bolts.

[0003] In order to meet assembly requirements and withstand the torque during bolt connection, the output pole base is fixed to the fixings of the battery box, generally using strong constraints such as nails and bolts, which results in a rigid connection between the output pole base and the battery box. When the fixings are deformed by external forces, the output pole base will move along with the fixings under the action of the rigid connection, causing the output pole copper and aluminum bars to pull the battery cell poles, resulting in a high risk of leakage in the battery cell poles. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model proposes an output pole base, which has the advantages of not moving synchronously with the deformation components of the battery box as the battery cell expands, having a small pulling force on the output pole copper and aluminum bar, and reducing the risk of leakage of the battery cell pole.

[0006] The embodiment of the utility model further provides a beam assembly.

[0007] An embodiment of the present utility model further provides a vehicle.

[0008] According to an embodiment of the utility model, the output pole base is used to be installed on a battery box, and includes a main body and an elastic component, the main body and the elastic component are arranged along a first direction, and the side of the elastic component away from the main body is connected to a fixing member on the battery box, and when the fixing member is deformed, it can push the elastic component to deform along the first direction.

[0009] According to the output pole base of the embodiment of the utility model, the main body is connected to the fixing part of the battery case through an elastic component, and the main body is used to be connected to the output pole copper-aluminum bar and the jumper copper-aluminum bar. Among them, when the fixing part of the battery case is deformed, the fixing part first compresses the elastic component to elastically deform along the first direction, and does not directly compress the main body. As the deformation amount of the fixing part increases, the force applied to the main body by the elastic component gradually increases. At this time, under the limitation of the output pole copper-aluminum bar and the jumper copper-aluminum bar on the main body, the deformation of the fixing part will not directly drive the main body to move synchronously, thereby effectively avoiding the distance between the main body and the battery cell becoming larger, resulting in excessive pulling force of the output pole copper-aluminum bar on the battery cell pole, thereby effectively reducing the risk of leakage of the battery cell pole, and ensuring the safe use of the battery pack.

[0010] In some embodiments, the fixing member includes at least one of a front end plate, a rear end plate and an expansion beam, the fixing member is provided with a mounting hole, the mounting hole has a first side surface and a second side surface opposite to each other along the first direction, the main body and the elastic component are both arranged in the mounting hole, the elastic component is located between the main body and the first side surface, the elastic component is connected to the first side surface, and the elastic component presses the main body toward the second side surface.

[0011] In some embodiments, the elastic component includes a first protrusion and an elastic member, the first protrusion is connected to the body through the elastic member, the first side surface is provided with a first clamping hole, and the first protrusion is clamped in the first clamping hole.

[0012] In some embodiments, the output pole base further includes a second protrusion, which is connected to the body and located on a side of the body away from the elastic component. A second clamping hole is provided on the second side surface, and the second protrusion is clamped in the second clamping hole.

[0013] In some embodiments, the elastic member includes a first elastic arm and a second elastic arm connected to each other, the free end of the first elastic arm is connected to the body, the free end of the second elastic arm is connected to the first protrusion, the body has a first position abutting against the second side surface, and when the body is located at the first position, the second elastic arm is spaced apart from the body, and the side of the second elastic arm facing away from the body is in contact with the first side surface.

[0014] In some embodiments, the extension direction of the first elastic arm forms an angle α with the first direction, and along the first direction, the projection of the first elastic arm in the depth direction of the mounting hole has a dimension L1, and the length of the second elastic arm is L2, wherein 60°≤α≤85°, 5mm≤L1≤15mm, and 10mm≤L2≤20mm.

[0015] In some embodiments, when the body is located at the first position, the distance between the second elastic arm and the body is W, wherein 2mm≤W≤5mm.

[0016] In some embodiments, the body, the elastic member and the first protrusion are integrally formed, and the elastic modulus of each of the body, the elastic member and the first protrusion is 1 GPa-20 GPa.

[0017] In some embodiments, the output pole base further includes a nut embedded in the body, and the nut is connected to the body by a connection method selected from the group consisting of pre-embedded injection molding, hot melting, and clamping.

[0018] In some embodiments, the first protrusion is formed with a guide surface, the guide surface is located on a side of the first protrusion away from the body, and the distance between the guide surface and the body gradually decreases along a direction approaching the bottom of the mounting hole.

[0019] The battery pack according to the embodiment of the utility model comprises a battery box and an output pole base as described in any of the above embodiments, and the elastic component of the output pole base is connected to the fixing member of the battery box.

[0020] The technical advantages of the battery pack according to the embodiment of the utility model are the same as the technical advantages of the output pole base of the above-mentioned embodiment, which will not be repeated here.

[0021] A vehicle according to an embodiment of the present invention includes a battery pack as described in the above embodiment.

[0022] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the battery pack in the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of an output pole base according to an embodiment of the utility model.

[0025] Figure 3 2 is another schematic diagram of the output pole base according to an embodiment of the utility model.

[0026] Figure 4 It is a side view of the output pole base according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1. Main body; 2. First protrusion; 21. Guide surface; 3. Elastic member; 31. First elastic arm; 32. Second elastic arm; 4. Second protrusion; 5. Nut; 6. Fixing member; 61. Mounting hole; 611. First side surface; 612. Second side surface; 613. First clamping hole; 614. Second clamping hole; 7. Output pole copper-aluminum busbar; 8. Jumper copper-aluminum busbar; 9. Bolt; 10. Battery cell. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0030] The output pole base is fixed on the fixings of the battery box, wherein the fixings may include the front and rear end plates of the module or the expansion beam of the box. The output pole base is fixed on the module end plates or the expansion beam of the box by strong constraint fixing forms such as nails and bolts. When the fixings are deformed by external forces, the output pole base will be displaced together with the fixings under the action of the rigid connection, which will cause the output pole copper and aluminum bars to pull the battery cell poles, causing the battery cell poles to have a high risk of leakage. For example, when the battery cell expands at the end of its cycle life, the front and rear end plates of the module or the expansion beam of the box will be displaced by the expansion force of the battery cell. At this time, under the action of the rigid connection, the output pole base will be displaced together with the module end plates or the expansion beam of the box, causing the output pole copper and aluminum bars to pull the battery cell poles, causing the battery cell poles to have a high risk of leakage.

[0031] In order to solve the above defects, the following Figure 1-Figure 4 The output pole base according to the embodiment of the utility model is described.

[0032] According to the embodiment of the utility model, the output pole base is used to be installed on the battery box and includes a main body 1 and an elastic component. The main body 1 and the elastic component are arranged along a first direction. The side of the elastic component away from the main body 1 is connected to a fixing member 6 on the battery box. When the fixing member 6 is deformed, it can push the elastic component to deform along the first direction.

[0033] According to the output pole base of the embodiment of the utility model, the main body 1 is connected to the fixing member 6 of the battery case through an elastic component, and the main body 1 is used to be connected to the output pole copper-aluminum bar 7 and the jumper copper-aluminum bar 8. Among them, when the fixing member 6 of the battery case is deformed, the fixing member 6 first compresses the elastic component to elastically deform along the first direction, and does not directly compress the main body 1. As the deformation amount of the fixing member 6 increases, the force exerted on the main body 1 by the elastic component gradually increases. At this time, under the limitation of the output pole copper-aluminum bar 7 and the jumper copper-aluminum bar 8 on the main body 1, the fixing member 6 will not directly drive the main body 1 to move synchronously when deformed, thereby effectively avoiding the distance between the main body 1 and the battery cell becoming larger, resulting in excessive pulling force of the output pole copper-aluminum bar 7 on the battery cell 10 pole, thereby effectively reducing the risk of leakage of the battery cell 10 pole, and ensuring the safety of the battery pack.

[0034] It should be noted that the first direction is the arrangement direction of the multiple battery cells 10 in the battery module, and is also the expansion direction of the battery cells 10 . The deformation of the fixing member 6 is mainly caused by the expansion pressure of the battery cells 10 .

[0035] In some embodiments, the fixing member 6 includes at least one of a front end plate, a rear end plate and an expansion beam, and a mounting hole 61 is provided on the fixing member 6, and the mounting hole 61 has a first side surface 611 and a second side surface 612 opposite to each other along a first direction, and the main body 1 and the elastic component are both arranged in the mounting hole 61, and the elastic component is located between the main body 1 and the first side surface 611, and the elastic component is connected to the first side surface 611, and the elastic component presses the main body 1 toward the second side surface 612.

[0036] The elastic component is connected to the first side surface 611 and presses the body 1 toward the second side surface 612 to achieve the fixation of the body 1 in the mounting hole 61. At this position, the body 1 is connected to the output copper-aluminum bar 7 and the bridging copper-aluminum bar 8. Among them, the second side surface 612 is located on the side of the first side surface 611 away from the battery module. When the battery cell 10 in the battery module expands to press the fixing member 6 to deform and displace in the direction away from the battery module, under the pulling of the output copper-aluminum bar 7 on the body 1, the body 1 and the deformed fixing member 6 jointly compress the elastic component to deform to avoid the body 1 from being displaced synchronously with the fixing member 6, thereby effectively avoiding the distance between the body 1 and the battery module from increasing, resulting in excessive pulling force of the output copper-aluminum bar 7 on the pole of the battery cell 10, thereby effectively reducing the risk of leakage of the pole of the battery cell 10, and ensuring the safety of the battery pack.

[0037] In some embodiments, the elastic component includes a first protrusion 2 and an elastic member 3 , the first protrusion 2 is connected to the body 1 via the elastic member 3 , the first side surface 611 is provided with a first clamping hole 613 , and the first protrusion 2 is clamped in the first clamping hole 613 .

[0038] When the main body 1 is inserted into the mounting hole 61, the first protrusion 2 is simultaneously inserted into the mounting hole 61 through the elastic deformation of the elastic member 3, and the first protrusion 2 is snapped into the first snapping hole 613 to fix the main body 1 in the mounting hole 61, and the output pole base is easy to disassemble and assemble on the fixing member 6.

[0039] It should be noted that the outer contour of the cross section of the main body 1 is generally rectangular. Under the guide limit of the mounting hole 61, the main body 1 only slides relative to the fixing member 6 along the first direction without self-rotation, thereby effectively ensuring that the output pole copper-aluminum bar 7 and the bridging copper-aluminum bar 8 are reliably connected to the main body 1.

[0040] In some embodiments, Figure 1 and Figure 3 As shown, the output pole base also includes a second protrusion 4, which is connected to the body 1 and located on the side of the body 1 away from the elastic component. A second clamping hole 614 is provided on the second side surface 612, and the second protrusion 4 is clamped in the second clamping hole 614.

[0041] That is, when the main body 1 is inserted into the mounting hole 61, the first protrusion 2 and the second protrusion 4 are respectively clamped in the first clamping hole 613 and the second clamping hole 614, and the first protrusion 2 and the second protrusion 4 simultaneously limit the main body 1 in the depth direction of the mounting hole 61, and the installation reliability of the output pole base on the fixing member 6 is higher.

[0042] Specifically, the second protrusion 4 is fixed on the side of the main body 1 away from the first protrusion 2. The side of the second protrusion 4 away from the main body 1 is a guide slope. The distance between the guide slope and the main body 1 gradually decreases in the direction approaching the bottom of the mounting hole 61, thereby making the assembly difficulty of the output pole base and the fixing member 6 lower.

[0043] In some embodiments, Figure 1 and Figure 4 As shown, the elastic member 3 includes a first elastic arm 31 and a second elastic arm 32 connected to each other, the free end of the first elastic arm 31 is connected to the main body 1, the free end of the second elastic arm 32 is connected to the first protrusion 2, the main body 1 has a first position abutting against the second side surface 612, when the main body 1 is in the first position, the second elastic arm 32 is spaced apart from the main body 1, and the side of the second elastic arm 32 facing away from the main body 1 is in contact with the first side surface 611.

[0044] At this time, the contact area between the second elastic arm 32 and the first side surface 611 is large. In other words, the output pole base is in contact with the first side surface 611 and the second side surface 612 of the mounting hole 61 in the first position, thereby effectively preventing the output pole base from shaking in the first direction and affecting its installation reliability on the fixing member 6.

[0045] Specifically, Figure 1As shown, the first elastic arm 31 is located above the second elastic arm 32 , the free end of the first elastic arm 31 is adjacent to the upper end surface of the body 1 , and the first protrusion 2 is located on the side of the second elastic arm 32 away from the body 1 .

[0046] It should be noted that when the body 1 is in the first position, the second elastic arm 32 and the first elastic arm 31 may not be elastically deformed, that is, the state of the elastic member 3 is the same before and after the body 1 is inserted into the mounting hole 61. At this time, when the fixing member 6 is deformed and displaced in the direction away from the battery module, the output copper-aluminum bar 7 only needs to give a small pulling force to the body 1 to drive the body 1 to compress the elastic member 3 to deform, ensuring that the body 1 will not be displaced synchronously with the fixing member 6, and the increase in the pulling force of the output copper-aluminum bar 7 on the pole will not be much, thereby further reducing the risk of leakage of the pole of the battery cell 10.

[0047] In some embodiments, Figure 4 As shown, the extension direction of the first elastic arm 31 forms an angle α with the first direction. Along the first direction, the projection of the first elastic arm 31 in the depth direction of the mounting hole 61 is L1, and the length of the second elastic arm 32 is L2, wherein 60°≤α≤85°, 5mm≤L1≤15mm, and 10mm≤L2≤20mm.

[0048] In this angle range, the first elastic arm 31 is more likely to bend and deform relative to the main body 1 when under pressure, and the dimensions of L1 and L2 also make it easy for the distance between the main body 1 and the first protrusion 2 in the first direction to reach a set value, so that the main body 1 can absorb a sufficiently large amount of expansion and deformation.

[0049] Specifically, the angle between the extension direction of the first elastic arm 31 and the first direction can be 60°, 70° and 85°, the projection of the first elastic arm 31 along the first direction in the depth direction of the mounting hole 61 can be 5mm, 8mm, 10mm and 15mm, and the length of the second elastic arm 32 can be 10mm, 15mm and 20mm.

[0050] In some embodiments, Figure 4 As shown, when the body 1 is located at the first position, the distance between the second elastic arm 32 and the body 1 is W, wherein 2mm≤W≤5mm.

[0051] At this time, the distance between the second elastic arm 32 and the main body 1 is the maximum displacement of the main body 1 relative to the fixing part 6 in the first direction. The distance under this size is greater than the maximum displacement of the fixing part 6 caused by the expansion and pressure of the battery cell 10, so as to better reduce the pulling force of the output copper-aluminum bus 7 on the pole of the battery cell 10, and the risk of leakage generated by the pole of the battery cell 10 is lower.

[0052] Specifically, the distance between the second elastic arm 32 and the body 1 can be 2 mm, 3 mm, and 5 mm.

[0053] In some embodiments, the body 1 , the elastic member 3 and the first protrusion 2 are integrally formed, and the elastic modulus of each of the body 1 , the elastic member 3 and the first protrusion 2 is 1 GPa-20 GPa.

[0054] At this time, when the body 1 is in the first position, the elastic member 3 can reliably press the first protrusion 2 to be clamped in the first clamping hole 613, so as to ensure that the output pole base is reliably fixed on the fixing member 6. At the same time, when the fixing member 6 is deformed and displaced, the force required by the body 1 to compress the elastic member 3 to deform is also smaller, which effectively avoids the elastic force of the elastic member 3 being too large and causing the output pole copper-aluminum bar 7 to pull the pole too much.

[0055] In some embodiments, Figure 3 As shown, the output pole base further includes a nut 5 embedded in the body 1, and the nut 5 is connected to the body 1 by a connection method selected from the group consisting of pre-embedded injection molding, hot melting and clamping.

[0056] Therefore, the threaded holes on the body 1 can be formed conveniently and reliably. At this time, the body 1 can be made of insulating material to ensure the safety of the battery pack.

[0057] Specifically, Figure 1 As shown, the nut 5 is embedded in the upper surface of the body 1, and the bolt 9 passes through the bridging copper-aluminum bar 8 and the output-pole copper-aluminum bar 7 and is threadedly matched with the threaded hole on the nut 5 to achieve the installation and reliable electrical connection of the bridging copper-aluminum bar 8 and the output-pole copper-aluminum bar 7 on the body 1.

[0058] In some embodiments, Figure 4 As shown, the first protrusion 2 is formed with a guide surface 21, which is located on the side of the first protrusion 2 away from the body 1, and the distance between the guide surface 21 and the body 1 gradually decreases along the direction close to the bottom of the mounting hole 61. This makes it easier to insert the output pole base into the mounting hole 61, and the installation of the output pole base on the fixing member 6 is simple and convenient.

[0059] The battery pack according to the embodiment of the utility model comprises a battery box and an output pole base as in any of the above embodiments, and the elastic component of the output pole base is connected to the fixing member 6 of the battery box.

[0060] The technical advantages of the battery pack according to the embodiment of the utility model are the same as the technical advantages of the output pole base of the above-mentioned embodiment, which will not be repeated here.

[0061] A vehicle according to an embodiment of the present invention includes a battery pack as described in the above embodiment.

[0062] Specifically, the battery pack also includes a battery module, the battery module is arranged in a battery box, the output pole base is installed on the battery box and is connected to the output pole of the battery module.

[0063] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the battery pack in the above-mentioned embodiment, which will not be repeated here.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0065] In addition, 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 the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics 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.

[0069] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An output pole base, used for installation on a battery box, characterized in that: It includes a main body and an elastic component, the main body and the elastic component are arranged along a first direction, the side of the elastic component away from the main body is connected to a fixing member on the battery box, and when the fixing member is deformed, it can push the elastic component to deform along the first direction.

2. The output pole base according to claim 1, characterized in that: The fixing member includes at least one of a front end plate, a rear end plate and an expansion beam, and a mounting hole is provided on the fixing member, and the mounting hole has a first side surface and a second side surface opposite to each other along the first direction, and the main body and the elastic component are both arranged in the mounting hole, and the elastic component is located between the main body and the first side surface, and the elastic component is connected to the first side surface, and the elastic component presses the main body toward the second side surface.

3. The output pole base according to claim 2, characterized in that: The elastic component includes a first protrusion and an elastic member, the first protrusion is connected to the body through the elastic member, the first side surface is provided with a first clamping hole, and the first protrusion is clamped in the first clamping hole.

4. The output pole base according to claim 2, characterized in that: The output pole base also includes a second protrusion, which is connected to the body and located on a side of the body away from the elastic component. A second clamping hole is provided on the second side surface, and the second protrusion is clamped in the second clamping hole.

5. The output pole base according to claim 3, characterized in that: The elastic member includes a first elastic arm and a second elastic arm connected to each other, the free end of the first elastic arm is connected to the body, the free end of the second elastic arm is connected to the first protrusion, the body has a first position abutting against the second side surface, when the body is located at the first position, the second elastic arm is spaced apart from the body, and the side of the second elastic arm facing away from the body is in contact with the first side surface.

6. The output pole base according to claim 5, characterized in that: The extension direction of the first elastic arm forms an angle α with the first direction. Along the first direction, the projection of the first elastic arm in the depth direction of the mounting hole has a dimension L1, and the length of the second elastic arm is L2, wherein 60°≤α≤85°, 5mm≤L1≤15mm, and 10mm≤L2≤20mm.

7. The output pole base according to claim 5, characterized in that: When the body is located at the first position, the distance between the second elastic arm and the body is W, wherein 2mm≤W≤5mm.

8. The output pole base according to claim 3, characterized in that: The body, the elastic member and the first protrusion are integrally formed, and the elastic modulus of each of the body, the elastic member and the first protrusion is 1 GPa-20 GPa.

9. The output pole base according to claim 1, characterized in that: The output pole base also includes a nut embedded in the body, and the nut is connected to the body by a connection method selected from the group consisting of pre-embedded injection molding, hot melting and clamping.

10. The output pole base according to claim 3, characterized in that: The first protrusion is formed with a guide surface, and the guide surface is located at a side of the first protrusion away from the main body. Along the direction approaching the bottom of the mounting hole, the distance between the guide surface and the main body gradually decreases.

11. A battery pack, characterized in that: It comprises a battery box and an output pole base according to any one of claims 1 to 10, wherein the elastic component of the output pole base is connected to the fixing piece of the battery box.

12. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 11.

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