Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack includes a plurality of battery cells, glue layer and blocking glue member, the plurality of battery cells are arranged in order, there is a gap between two adjacent battery cells, the glue layer is adhered to the end portions of the plurality of battery cells, the blocking glue member shields the port of the gap, and the glue layer is adhered to the end portion of the plurality of battery cells. And the glue blocking piece is used for blocking the glue layer from entering the gap, the glue blocking piece is provided with an air hole, and the air hole is used for discharging air between the glue layer and a component bonded with the glue layer when the glue layer is pressed. According to the battery pack disclosed by the utility model, the situation that overflowing glue extends into reserved gaps among the battery cells is avoided, the problem of air trapping of a glue piece is solved, and the structural strength and the sealing property of bonding are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack and a vehicle using the battery pack. Background Art

[0002] An expansion gap is usually reserved between battery cells. However, since glue is used to fix the battery cells or other components inside the battery pack, the reserved expansion gap is easily filled with glue, which affects the service life of the battery cells. If the amount of glue is reduced, the glue coating area will be insufficient, affecting the structural strength. Therefore, how to ensure the structural strength while ensuring the service life of the battery cells is an urgent problem to be solved. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model provides a battery pack, which not only avoids the situation where glue extends into the reserved gaps between battery cells, but also improves the problem of air entrapment, and ensures the structural strength and sealing of the glue layer bonding.

[0005] An embodiment of the utility model further provides a vehicle including the above-mentioned battery pack.

[0006] The battery pack of the utility model embodiment includes:

[0007] A plurality of battery cells are arranged in sequence, and a gap is provided between two adjacent battery cells;

[0008] An adhesive layer, the adhesive layer being bonded to ends of the plurality of battery cells;

[0009] The rubber blocking member is provided with air holes, and the air holes are used to discharge the gas between the rubber layer and the parts bonded to the rubber layer when the rubber layer is under pressure.

[0010] The battery pack of the embodiment of the utility model not only avoids the situation where the glue extends into the reserved gaps between the battery cells, but also improves the problem of air entrapment, thereby ensuring the structural strength and sealing of the adhesive layer.

[0011] In some embodiments, along the arrangement direction of the plurality of battery cells, the width of the gap is smaller than the width of the rubber stopper;

[0012] And / or, the width dimension of the rubber stopper is 2 to 3 times the upper limit value of the width dimension of the gap.

[0013] In some embodiments, along the length direction, the length dimension of the rubber blocking member is not less than the length dimension of the battery cell, and the length direction is perpendicular to the arrangement direction of the plurality of battery cells.

[0014] In some embodiments, the pores have a diameter of 1 mm to 3 mm.

[0015] In some embodiments, the air hole is located in the middle of the rubber stopper in the width direction.

[0016] In some embodiments, the pores extend along the thickness direction of the rubber stopper, and in the extending direction of the pores, one end of the pores is communicated with the rubber layer, and the other end of the pores is communicated with the gap.

[0017] In some embodiments, the rubber blocking member is provided with a plurality of the air holes, and the plurality of the air holes are arranged at intervals along the length direction of the rubber blocking member.

[0018] In some embodiments, the gap is provided between any two adjacent battery cells, and there are a plurality of rubber blocking members, which correspond one to one to block the ports of the gaps.

[0019] In some embodiments, it includes a shell and a cover, the cover covers the opening of the shell, a plurality of battery cells are arranged in the shell, and the glue layer is sandwiched between the cover and the plurality of battery cells.

[0020] The vehicle of the embodiment of the utility model includes a battery pack as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an explosion of a battery pack according to an embodiment of the utility model.

[0022] Figure 2 It is a top view schematic diagram of a battery pack according to an embodiment of the utility model.

[0023] Figure 3 yes Figure 2 Schematic cross-sectional view at AA in the middle.

[0024] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A in the middle.

[0025] Figure 5 It is a schematic diagram of the arrangement of the battery core and the rubber stopper of an embodiment of the utility model.

[0026] Figure 6 yes Figure 5 A local enlarged schematic diagram of point B in the middle.

[0027] Reference numerals:

[0028] Battery cell 1;

[0029] Adhesive layer 2;

[0030] Rubber stopper 3; air hole 31;

[0031] Shell 4;

[0032] Cover 5;

[0033] Gap 6. DETAILED DESCRIPTION

[0034] 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.

[0035] like Figure 1 As shown, the battery pack of the embodiment of the utility model includes a plurality of battery cells 1, a glue layer 2 and a glue stopper 3.

[0036] The plurality of battery cells 1 are arranged in sequence, and there is a gap 6 between two adjacent battery cells 1. For example, Figure 1 and Figure 4 As shown, a plurality of battery cells 1 may be arranged in sequence along the front-to-back direction, and the gap 6 is the interval space reserved between any two adjacent battery cells 1 .

[0037] The adhesive layer 2 is bonded to the ends of the plurality of battery cells 1, for example, Figure 1 and Figure 4 As shown, the adhesive layer 2 can be a structural adhesive. When assembling the battery pack, the adhesive layer 2 can be bonded to the ends of multiple battery cells 1. When the battery cells 1 are assembled, the adhesive layer 2 can be applied on the top of the battery cells 1. The adhesive layer 2 can connect and fix the battery cells 1 and the subsequent cover 5 or other components, thereby fixing the battery cells 1. The adhesive blocking member 3 blocks the end of the gap 6. For example, the adhesive layer 2 can be in the shape of a strip. There are multiple adhesive layers 2. The multiple adhesive layers 2 can be arranged along the gap 6. Figure 1 The rubber stopper can be arranged in a spaced manner in the front-to-back direction, and the rubber stopper can be located between two adjacent rubber layers 2. When assembling the battery pack, the rubber stopper can be directly opposite to the gap between two adjacent battery cells 1, thereby playing the role of shielding the port of the gap.

[0038] When in use, the glue stopper 3 is used to prevent the glue of the glue layer 2 from entering the gap 6 when it is not yet solidified during the assembly process. Figure 1 As shown, the rubber stopper 3 may be in the shape of a long strip, and a plurality of rubber stoppers 3 may be provided, and the number of the rubber stoppers 3 is the same as the number of the gaps 6 formed between the plurality of battery cells 1. Figure 4As shown, the end of the gap 6 can be the opening of the gap 6 toward the glue layer 2, specifically the upper opening of the gap 6, and the multiple glue blocking members 3 can block the ends of the multiple gaps 6 one by one.

[0039] The glue stopper 3 is arranged at the gap port, which can prevent the glue of the glue layer 2 from penetrating into the gap 6 during the glue coating process, thereby ensuring that there is space for absorbing expansion between two adjacent battery cells 1, which has the effect of enhancing the cycle life of the battery.

[0040] The adhesive stopper 3 is provided with air holes 31, which are used to discharge gas between the adhesive layer 2 and the component bonded to the adhesive layer 2 when the adhesive layer 2 is under pressure. The component bonded to the adhesive layer 2 can be the above-mentioned battery cell 1, or can be the cover 5, bottom plate and other components of the battery pack.

[0041] For example, Figure 6 As shown, the air hole 31 can penetrate the rubber stopper 3 in the up-down direction and connect the upper and lower sides of the rubber stopper 3. The glue layer 2 can be located between the multiple battery cells 1 and the cover 5, wherein the cover 5 can be the upper cover of the battery pack, which plays the role of sealing the upper side of the battery pack.

[0042] When assembling the battery pack, the glue layer 2 can be first bonded and fixed to the multiple battery cells 1, and then the cover 5 can be buckled on top of the glue layer 2. At this time, the glue layer 2 will be subjected to the pressure of the cover 5. Under the action of this pressure, the gas between the glue layer 2 and the cover 5 can be discharged through the air holes 31, avoiding the situation where the gas stagnates between the glue layer 2 and the cover 5 and causes trapped air to affect the bonding strength, thereby ensuring the connection area and connection strength between the glue layer 2 and the cover 5.

[0043] In some other embodiments, when assembling the battery pack, the glue layer 2 may also be first bonded and fixed to the cover body 5, and then the glue layer 2 may be bonded and fixed to the assembled battery cell 1 by pressing the cover body 5. At this time, the gas between the glue layer 2 and the battery cell 1 may also be discharged through the air holes 31. In other embodiments, the glue layer 2 may also be bonded between multiple battery cells 1 and the bottom plate of the battery pack, and the air holes 31 on the glue blocking member may also serve to discharge the gas between the bottom plate and the glue layer 2. In some embodiments, the gap 6 and the glue blocking member 3 both have a width dimension along the arrangement direction of the multiple battery cells 1, and the width dimension of the gap 6 is smaller than the width dimension of the glue blocking member 3. For example, as Figure 5 As shown, the width dimension of the gap 6 is the dimension in the front-to-back direction. Figure 6 As shown, the width dimension of the rubber stopper 3 is also the dimension in the front-to-back direction.

[0044] The width of the rubber stopper 3 is greater than the width of the gap 6, so that when the rubber stopper 3 is fixed, the front and rear edges of the rubber stopper 3 can overlap the top side of the corresponding battery cell 1, such as Figure 4As shown, it is ensured that the rubber blocking member 3 can seal and block the top port of the gap 6, thereby ensuring the shielding effect.

[0045] In some embodiments, the width of the rubber stopper 3 is 2 to 3 times the upper limit of the width of the gap 6. For example, the width of the rubber stopper 3 may be 2 times, 2.5 times, 3 times, etc., of the width of the gap 6. Thus, the effectiveness of the rubber stopper 3 in shielding the port of the gap 6 is met, and the waste of materials caused by the excessive size of the rubber stopper 3 is avoided, which is conducive to reducing the layout cost of the rubber stopper 3.

[0046] In some embodiments, the width of the rubber stopper 3 is 4 mm to 6 mm. Figure 6 As shown, the width dimension of the rubber stopper 3 can be dimension M, and the dimension M can specifically be 4mm, 4.5mm, 5mm, 5.5mm, 6mm, etc. Within this dimension range, the width dimension of the rubber stopper 3 can be adapted to the designed gap 6 between the existing battery cells 1, thereby increasing the versatility of the rubber stopper 3.

[0047] In some embodiments, along the length direction, the length dimension of the rubber blocking member 3 is not less than the length dimension of the battery cell 1 , and the length direction is perpendicular to the arrangement direction of the plurality of battery cells.

[0048] For example, Figure 1 and Figure 5 As shown, the length direction can be the left-right direction, and the length dimension of the rubber stopper 3 is the dimension of the rubber stopper 3 in the left-right direction. The battery cell 1 can be a honeycomb blade battery cell 1, and the length dimension of the battery cell 1 is the dimension of the battery cell 1 in the left-right direction. The length dimension of the rubber stopper 3 can be consistent with the length dimension of the battery cell 1. In some other embodiments, the length dimension of the rubber stopper 3 can also be slightly larger than the length dimension of the battery cell 1. In this way, the rubber stopper 3 can completely block the port of the gap 6 in the left-right direction, further avoiding the situation where the glue overflows from the glue layer 2 and penetrates into the gap 6.

[0049] In some embodiments, the length of the rubber stopper 3 is 50 mm to 650 mm. Figure 1 As shown, the length dimension of the rubber stopper 3 may be dimension L, and the dimension L may specifically be 50mm, 70mm, 100mm, 150mm, 180mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, etc. Within this dimension range, the length dimension of the rubber stopper 3 may be adapted to the length of the existing battery cell 1, further increasing the versatility and adaptability of the rubber stopper 3.

[0050] In some embodiments, the thickness of the rubber stopper 3 is 0.2 mm to 2 mm. The thickness of the rubber stopper 3 is the size of the rubber stopper 3 in the up and down direction, and the thickness of the rubber stopper 3 can be 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, etc. Thus, while ensuring the shielding effect, the material consumption of the rubber stopper 3 can be reduced.

[0051] In some embodiments, the aperture of the pore 31 is 1 mm to 3 mm. For example, the pore 31 may be a circular hole, and the aperture of the pore 31 is the diameter of the pore 31, and the aperture of the pore 31 may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. Within this numerical range, the use requirements of exhaust are met, and the situation that the aperture of the pore 31 is too large and the glue easily passes through the pore 31 is avoided.

[0052] In some embodiments, the air hole 31 is located in the middle of the width direction of the rubber stopper 3. Figure 6 As shown, the width direction of the rubber stopper 3 is the front-to-back direction, and in the front-to-back direction, the air hole 31 can be located in the middle of the rubber stopper 3. This ensures the symmetry of the structure of the rubber stopper 3, thereby ensuring that the air is exhausted from the center of the rubber stopper 3, and avoiding the situation where the reaction force of the exhaust when the air hole 31 is offset easily causes the rubber stopper 3 to shift.

[0053] In some embodiments, the pores 31 extend along the thickness direction of the rubber stopper 3, and in the extending direction of the pores 31, one end of the pores 31 is used to face the rubber layer 2, and the other end of the pores 31 is connected to the gap 6. Specifically, the thickness direction can be the up-down direction, the pores 31 extend along the up-down direction, the top opening of the pores 31 is arranged opposite to the rubber layer 2, and the bottom end of the pores 31 can be connected to the gap 6, which is conducive to ensuring the exhaust effect.

[0054] It is understandable that, depending on the actual layout of the battery pack, the air hole 31 can also connect the glue layer 2 with other spaces. For example, one end of the air hole 31 is connected to the glue layer 2, and the other end is located at the end of the length direction of the glue blocking part 3, so that the glue layer 2 is connected to the space in the length direction to achieve exhaust.

[0055] In some embodiments, the rubber stopper 3 and the battery cell 1 are arranged at intervals, and the interval between the rubber stopper 3 and the battery cell 1 is 1 mm to 80 mm. For example, the top side of the rubber stopper 3 can be bonded and fixed to the glue layer 2, and the bottom side of the rubber stopper 3 can be spaced a certain distance from the battery cell 1, and the distance between the rubber stopper 3 and the battery cell 1 can be 1 mm, 20 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, etc. The projection of the rubber stopper 3 in the up and down directions can cover the port of the gap 6, thereby preventing the glue of the glue layer 2 directly above the gap 6 from extending into the gap 6.

[0056] In other embodiments, the rubber stopper 3 may also be in contact with the battery cell 1 , for example, the top side of the rubber stopper 3 may be bonded to the adhesive layer 2 , and the bottom side of the rubber stopper 3 may be bonded to the battery cell 1 via the backing adhesive.

[0057] In some embodiments, the rubber blocking member 3 is provided with a plurality of air holes 31, and the plurality of air holes 31 are arranged at intervals along the length direction of the rubber blocking member 3. Figure 6 As shown, each rubber blocking member 3 may be provided with a plurality of air holes 31 , and the plurality of air holes 31 may be arranged at equal intervals along the left-right direction, thereby ensuring the exhaust effect of each position of the rubber blocking member 3 in the left-right direction.

[0058] In some embodiments, the battery pack includes a shell 4 and a cover 5, the cover 5 covers the opening of the shell 4, a plurality of battery cells 1 are arranged in the shell 4, and the glue layer 2 is sandwiched between the cover 5 and the plurality of battery cells 1. Figures 1 to 3 As shown, the housing 4 may be a lower tray of the battery pack, and a mounting groove may be provided in the lower tray. The cover 5 may be an upper cover of the battery pack, and the cover 5 may be buckled on the top of the housing 4 and block the top opening of the housing 4. Figure 4 As shown, multiple battery cells 1 can be assembled into two modules, both modules are placed in the assembly groove of the shell 4, the glue layer 2 can be bonded between the two modules and the cover 5, and multiple glue blocking parts 3 can be bonded and fixed between the glue layer 2 and the corresponding battery cells 1 of each module.

[0059] The following describes a vehicle according to an embodiment of the present invention.

[0060] The vehicle of the embodiment of the utility model includes a battery pack, which can be a battery pack as described in any of the above embodiments. The vehicle can be a new energy vehicle, specifically a sedan, SUV, bus, or other vehicle that requires a battery pack as a power source.

[0061] 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. A battery pack, It is characterized in that include: A plurality of battery cells are arranged in sequence, and a gap is provided between two adjacent battery cells; An adhesive layer, the adhesive layer being bonded to ends of the plurality of battery cells; The rubber blocking member is provided with air holes, and the air holes are used to discharge the gas between the rubber layer and the parts bonded to the rubber layer when the rubber layer is under pressure.

2. The battery pack according to claim 1, It is characterized in that Along the arrangement direction of the plurality of battery cells, the width of the gap is smaller than the width of the rubber stopper; And / or, the width dimension of the rubber stopper is 2 to 3 times the upper limit value of the width dimension of the gap.

3. The battery pack according to claim 1, It is characterized in that Along the length direction, the length dimension of the rubber blocking member is not less than the length dimension of the battery core, and the length direction is perpendicular to the arrangement direction of the multiple battery cores.

4. The battery pack according to claim 1, It is characterized in that The pores have a diameter of 1 mm to 3 mm.

5. The battery pack according to claim 1, It is characterized in that The air hole is located in the middle of the rubber blocking member in the width direction.

6. The battery pack according to claim 1, It is characterized in that The pores extend along the thickness direction of the glue blocking member, and in the extending direction of the pores, one end of the pores is used to face the glue layer, and the other end of the pores is communicated with the gap.

7. The battery pack according to claim 1, It is characterized in that The rubber blocking member is provided with a plurality of the air holes, and the plurality of the air holes are arranged at intervals along the length direction of the rubber blocking member.

8. The battery pack according to claim 7, It is characterized in that The gap is provided between any two adjacent battery cells, and there are a plurality of rubber blocking members, which are arranged to block the ports of the gaps in a one-to-one correspondence.

9. The battery pack according to any one of claims 1 to 8, It is characterized in that It comprises a shell and a cover, wherein the cover covers the opening of the shell, a plurality of battery cells are arranged in the shell, and the glue layer is sandwiched between the cover and the plurality of battery cells.

10. A vehicle, It is characterized in that A battery pack comprising any one of claims 1 to 9.

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