Battery pack

Abstract

The utility model provides a battery pack, which belongs to the technical field of battery packs, and comprises a box body, a battery cell, a glue limiting piece and a glue piece, and the box body is provided with a mounting plate; a battery cell is arranged above the mounting plate, and the battery cell is provided with a to-be-bonded surface; the glue limiting piece is arranged between the to-be-bonded surface and the mounting plate, and a bonding space is defined among the glue limiting piece, the to-be-bonded surface and the mounting plate; the adhesive part is filled in the bonding space, and the adhesive limiting part is dissolved in the solvent prior to the adhesive part to form a flow channel. According to the battery pack provided by the utility model, by arranging the glue limiting piece, when the battery core is disassembled, the glue limiting piece is firstly dissolved and removed to form the runner, and the runner can be convenient for a solvent to enter, so that the contact area of the solvent and the glue limiting piece is increased, the glue removing efficiency is improved, and the disassembling efficiency is further improved; the glue limiting piece is also used for forming a bonding space, and the plane size and the thickness of the bonding space can be adjusted by adjusting the size and the position of the glue limiting piece.

Description

Technical Field

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

[0002] The CTP (cell to pack) solution integrates the battery cells directly into the battery pack, eliminating the intermediate module link, improving space utilization and reducing battery pack costs.

[0003] The current CTP solution is to use structural adhesive to directly bond the battery cell to the bottom of the box to fix the battery cell. In order to achieve the cascade utilization of CTP batteries, the structural adhesive can be disassembled by the adhesive dissolving agent method. The adhesive dissolving agent method uses organic solvent swelling and chemical reaction to destroy the chemical bonds or intermolecular forces in the glue.

[0004] However, due to the close arrangement of battery cells, the area where the structural adhesive can come into contact with the debonding agent is small, resulting in a long debonding time and low efficiency. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that when the structural adhesive in the battery pack is disassembled by a disintegrator, the contact area between the structural adhesive and the disintegrator is small, resulting in a long disintegration time and low efficiency, thereby providing a battery pack.

[0006] In order to solve the above technical problems, the utility model provides a battery pack, comprising:

[0007] A box body having a mounting plate;

[0008] A battery cell is arranged above the mounting plate, and the battery cell has a surface to be bonded;

[0009] A glue limiting member is arranged between the surface to be bonded and the mounting plate, and a bonding space is defined between the glue limiting member, the surface to be bonded and the mounting plate;

[0010] The adhesive piece is filled in the bonding space, and the adhesive limiting piece can be dissolved in the solvent before the adhesive piece to form a flow channel.

[0011] Optionally, at least one end of the rubber limiting component extends out of the battery core.

[0012] Optionally, the rubber limiting component is arranged along the length direction of the battery core.

[0013] Optionally, the adhesive limiting parts are arranged on both sides of the surface to be adhered along the width direction.

[0014] Optionally, the surface area of ​​the bonding space accounts for 90%-95% of the surface area of ​​the surface to be bonded.

[0015] Optionally, the glue limiting member is one or more of a straight bar structure, an arc bar structure and a wavy bar structure.

[0016] Optionally, there are a plurality of battery cells, and the plurality of battery cells are arranged in an array, and the plurality of rubber limiting components are arranged in an array.

[0017] Optionally, the adhesive member is structural adhesive.

[0018] Optionally, the rubber limiting component is made of water-soluble material.

[0019] Optionally, the adhesive limiting member and the adhesive member can be dissolved in the same adhesive dissolving agent, and the dissolving ability of the adhesive limiting member in the adhesive dissolving agent is greater than the dissolving ability of the adhesive member in the adhesive dissolving agent.

[0020] The technical solution of the utility model has the following advantages:

[0021] The battery pack provided by the utility model comprises a box body, a battery cell, a glue limiting part and an adhesive part. The box body has a mounting plate, the battery cell has a surface to be bonded, the glue limiting part is arranged between the mounting plate and the surface to be bonded, and a bonding space is defined between the glue limiting part, the surface to be bonded and the mounting plate; the adhesive part is filled in the bonding space, and the glue limiting part can be dissolved in a solvent in priority to the adhesive part to form a flow channel.

[0022] By setting the glue limiting parts, when disassembling the battery cells, since the glue limiting parts can be dissolved in the solvent before the adhesive parts to form a flow channel, the solvent can be added to dissolve and remove the glue limiting parts first to form a flow channel. The flow channel can facilitate the entry of the debonding agent, increase the contact area between the debonding agent and the adhesive parts, improve the debonding efficiency, and thus improve the disassembly efficiency. At the same time, the setting of the glue limiting parts is also used to form a bonding space. The plane size and thickness of the bonding space can be adjusted by adjusting the size and position of the glue limiting parts to meet different bonding strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of an exploded structure of a battery pack provided in an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of a partial installation structure of the battery cell in the mounting plate;

[0026] Figure 3 for Figure 2 A schematic diagram of a partial top view of the structure;

[0027] Figure 4 for Figure 1 Schematic diagram of the structure of the middle limit glue part and the adhesive part.

[0028] Description of reference numerals:

[0029] 1. Box body; 2. Mounting plate; 3. Battery cell; 4. Surface to be glued; 5. Glue-limiting parts; 6. Glue parts; 51. Extension section. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] The battery pack provided in this embodiment improves the efficiency of disassembling the battery cells by setting the rubber limiting parts.

[0036] like Figures 1 to 4 As shown, a specific implementation of the battery pack provided in this embodiment includes a box body 1, a battery cell 3, a glue limiting component 5 and an adhesive component 6, the box body 1 has a mounting plate 2; the battery cell 3 is arranged above the mounting plate 2, and the battery cell 3 has a surface to be bonded 4; the glue limiting component 5 is arranged between the surface to be bonded 4 and the mounting plate 2, and a bonding space is defined between the glue limiting component 5, the surface to be bonded 4 and the mounting plate 2; the adhesive component 6 is filled in the bonding space, and the glue limiting component 5 can be dissolved in the solvent in preference to the adhesive component 6 to form a flow channel.

[0037] By setting the glue limiting part 5, when disassembling the battery cell 3, since the glue limiting part 5 can be dissolved in the solvent before the adhesive part 6 to form a flow channel, the solvent can be added to dissolve and remove the glue limiting part 5 first to form a flow channel. The flow channel can facilitate the entry of the debonding agent, increase the contact area between the debonding agent and the adhesive part 6, improve the debonding efficiency, and thus improve the disassembly efficiency; at the same time, the setting of the glue limiting part 5 is also used to form a bonding space, and the plane size and thickness of the bonding space can be adjusted by adjusting the size and position of the glue limiting part 5 to meet different bonding requirements.

[0038] In a specific embodiment of the box body 1, cross beams and longitudinal beams are arranged inside the box body 1, and the cross beams and longitudinal beams are cross-arranged to form a plurality of rectangular accommodating cavities, each of which is provided with a battery pack, and the battery pack is composed of a plurality of battery cells 3 arranged in an array.

[0039] Specifically, the shape of the flow channel is determined by the structure of the rubber limiting member 5 .

[0040] Specifically, the adhesive limiting member 5 can be fixed on the surface to be bonded 4, can also be fixed on the mounting plate 2, or can be fixed on both the surface to be bonded 4 and the mounting plate 2. Preferably, the adhesive limiting member 5 is fixed on the mounting plate 2.

[0041] Specifically, the bottom surface of the battery cell 3 is the bonding surface 4, the bottom plate of the box body 1 is the mounting plate 2, and the bottom surface of the battery cell 3 is bonded to the bottom plate of the box body 1 through the adhesive 6. In other embodiments, the mounting plate 2 may also be a liquid cooling plate, or other structural parts of the box body 1, which is not limited here.

[0042] like Figure 3 and Figure 4 As shown, in the battery pack provided in this embodiment, at least one end of the rubber limiting member 5 extends out of the battery cell 3, that is, Figure 3 As shown, the rubber limiting member 5 has an extension section 51, and the extension section 51 is in the height direction (i.e. Figure 1When the rubber limiting member 5 is dissolved, the contact area between the rubber limiting member 5 and the solvent is not limited to the area of ​​its end surface. A large contact area increases the dissolution rate, that is, increases the flow channel formation rate. Specifically, one end of the rubber limiting member 5 extends out or both ends extend out at the same time, and the size and shape of the extension of the battery cell 3 are not limited.

[0043] In addition, as an alternative implementation, the end of the adhesive limiting member 5 is flush with the end of the adhesive member 6 .

[0044] like Figure 4 As shown, in the battery pack provided in this embodiment, the adhesive limiting member 5 is arranged along the length direction of the battery cell 3 . Being arranged along the length direction, a longer flow channel can be formed to ensure sufficient contact area between the adhesive release agent and the adhesive member 6 .

[0045] like Figure 2 and Figure 3 As shown, the battery pack provided in this embodiment has the surface to be bonded 4 along the width direction (i.e. Figure 1 The adhesive limiting parts 5 are arranged on both sides (in the left and right directions), and the two opposite adhesive limiting parts 5 are easier to enclose to form an adhesive space, which is more conducive to the filling of the adhesive part 6.

[0046] Specifically, when the adhesive limiting members 5 are provided on both length sides of the surface 4 to be bonded, at least one end of the bonding space is an open end to facilitate the flow of the adhesive member 6. Figure 4 The structure shown is that both ends of the bonding space are open ends; in addition, when only one end is an open end, the other end is a closed end, and the closed end can be closed by additionally setting a glue limiting part 5, that is, the glue limiting parts 5 on both sides and the glue limiting parts 5 at the end form a U-shaped structure.

[0047] In addition, as an alternative embodiment, the glue limiting part 5 is arranged along the width direction of the battery cell 3, and a plurality of glue limiting parts 5 can be evenly arranged in the length direction according to the length of the battery cell 3, and a bonding space is formed between adjacent glue limiting parts 5. Since the width dimension of the battery cell 3 is smaller than the length dimension, a plurality of glue limiting parts 5 are arranged on the surface to be bonded 4 in this embodiment to form a plurality of flow channels, thereby ensuring the contact area between the solvent and the adhesive part 7.

[0048] In the battery pack provided in this embodiment, the surface area of ​​the bonding space accounts for 90%-95% of the surface area of ​​the surface to be bonded 4. When the adhesive limiting part 5 is provided, the bonding strength of the adhesive part 6 will not be affected. In a specific implementation manner, the surface area of ​​the bonding space accounts for 92% of the surface area of ​​the surface to be bonded 4.

[0049] In the battery pack provided in this embodiment, the rubber limiting member 5 is one or more of a straight bar structure, an arc bar structure and a wavy bar structure.

[0050] Specifically, Figure 4 The adhesive limiting member 5 shown in the figure is a straight bar structure, which is easy to install and can ensure the maximum bonding space.

[0051] In addition, when the glue limiting member 5 is a curved bar structure or a wavy bar structure, the contact area between the solvent and the adhesive member 6 can be increased; the glue limiting member 5 can also be a straight bar structure combined with the other two structures, that is, some of the multiple glue limiting members 5 in the box body 1 are straight bar structures, and the other part is a curved bar structure or a wavy bar structure, or some are curved bar structures and the other part is a wavy bar structure, etc., which are not listed here one by one.

[0052] like Figure 4 As shown, in the battery pack provided in this embodiment, a plurality of the adhesive limiting members 5 are arranged in an array, and a plurality of flow channels are arranged in an array, so that the adhesive dissolving speed of the adhesive member 6 is relatively uniform.

[0053] In the battery pack provided in this embodiment, the adhesive member 6 is a structural adhesive, which has high mechanical properties, can maintain stable performance under high temperature environment, and has good adhesion to ensure long-term firm bonding between the battery cell 3 and the box body 1. Specifically, the adhesive member 6 can be a polyurethane structural adhesive.

[0054] In the battery pack provided in this embodiment, the adhesive limiting part 5 is made of a water-soluble material. Specifically, the adhesive limiting part 5 is made of PVA material, which can be quickly dissolved in water. It should be noted that the present application does not limit the specific material of the adhesive limiting part 5, and any material known in the prior art that can be quickly dissolved in water can be used.

[0055] The disassembly process of the battery cell in this embodiment: water is selected as the solvent, and the debonding agent components may include organic solvents (such as ethanol, methanol, etc.), alkaline substances (such as sodium hydroxide, etc.), organic acids (such as acetic acid, propionic acid, etc.) and surfactants (such as sodium dodecylbenzene sulfonate, etc.), which reduce the viscosity of the adhesive part 6 through chemical reactions.

[0056] When the battery pack reaches the end of its life, first add a small amount of water into the box 1, the water level being equal to the thickness of the adhesive part 6. After the water dissolves the adhesive part 5, a flow channel is formed through which the debonding agent can pass, while the adhesive part 6 is insoluble in water. Then tilt the box 1 to drain the water in the box 1. Then add the debonding agent into the box 1. The debonding agent can contact the adhesive part 6 through the flow channel, increasing the contact area between the debonding agent and the adhesive part 6, thereby accelerating the penetration speed of the debonding agent, accelerating the debonding efficiency, accelerating the cell disassembly speed, and improving production efficiency.

[0057] Example 2

[0058] The battery pack provided in this embodiment is the same as that in Embodiment 1 in structure except that the material of the adhesive limiting member 5 is different. In this embodiment, the adhesive limiting member 5 and the adhesive member 6 can be dissolved in the same adhesive dissolving agent, and the solubility of the adhesive limiting member 5 in the adhesive dissolving agent is greater than the solubility of the adhesive member 6 in the adhesive dissolving agent, that is, when the adhesive limiting member 5 and the adhesive member 6 are placed in the adhesive dissolving agent at the same time, the adhesive limiting member 5 is first dissolved to form a flow channel, and then the adhesive member 6 is dissolved.

[0059] The disassembly process of the battery cell in this embodiment is as follows: a solvent, namely a debonding agent, is selected. The components of the debonding agent may be the components described in Embodiment 1, or other debonding agents that can act on the adhesive member 6 .

[0060] When the battery pack reaches the end of its life, a debonding agent is added to the box body 1. Since the solubility of the adhesive limiting part 5 in the debonding agent is greater than that of the adhesive part 6 in the debonding agent, the debonding agent first dissolves the adhesive limiting part 5 to form a flow channel. The debonding agent then flows into the flow channel and contacts the adhesive part 6 over a large area, thereby increasing the contact area between the debonding agent and the adhesive part 6, thereby accelerating the penetration speed of the debonding agent, accelerating the debonding efficiency, accelerating the cell disassembly speed, and improving production efficiency.

[0061] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A battery pack, characterized in that: include: A box body (1) having a mounting plate (2); A battery core (3) is arranged above the mounting plate (2), and the battery core (3) has a surface to be bonded (4); A glue limiting member (5) is arranged between the surface to be bonded (4) and the mounting plate (2), and a bonding space is defined between the glue limiting member (5), the surface to be bonded (4) and the mounting plate (2); The adhesive member (6) is filled in the bonding space, and the adhesive limiting member (5) can be dissolved in the solvent before the adhesive member (6) to form a flow channel.

2. The battery pack according to claim 1, characterized in that: At least one end of the rubber limiting member (5) is arranged to extend out of the battery core (3).

3. The battery pack according to claim 1, characterized in that: The rubber limiting member (5) is arranged along the length direction of the battery core (3).

4. The battery pack according to claim 3, characterized in that: The adhesive limiting parts (5) are arranged on both sides of the surface to be adhered (4) in the width direction.

5. The battery pack according to claim 1, characterized in that: The surface area of ​​the bonding space accounts for 90%-95% of the surface area of ​​the surface to be bonded (4).

6. The battery pack according to claim 1, characterized in that: The glue limiting member (5) is one or more of a straight bar structure, an arc bar structure and a wavy bar structure.

7. The battery pack according to claim 1, characterized in that: The battery cells (3) are multiple, the multiple battery cells (3) are arranged in an array, and the multiple glue limiting parts (5) are arranged in an array.

8. The battery pack according to claim 1, characterized in that: The adhesive component (6) is structural adhesive.

9. The battery pack according to any one of claims 1 to 8, characterized in that: The rubber limiting component (5) is made of water-soluble material.

10. The battery pack according to any one of claims 1 to 8, characterized in that: The adhesive limiting member (5) and the adhesive member (6) can be dissolved in the same adhesive dissolving agent, and the dissolving ability of the adhesive limiting member (5) in the adhesive dissolving agent is greater than the dissolving ability of the adhesive member (6) in the adhesive dissolving agent.

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