Electrolyte sustained release device, soft pack lithium ion battery

Abstract

The utility model discloses an electrolyte slow-release device and a soft-pack lithium-ion battery. The electrolyte slow-release device comprises: a slow-release structure; an electrolyte; an opening structure is provided on one side of the slow-release structure; the slow-release structure comprises a container and at least one closure, and the closure is located on a side close to the opening structure; the container and the closure together form a sealed accommodating space, and the electrolyte is placed in the accommodating space; the opening structure opens the closure when subjected to pressure, so that the electrolyte is released from the accommodating space. When the soft-pack battery cell expands during use, the utility model opens the closure by the opening structure, so that the electrolyte flows out of the accommodating space, so as to replenish the electrolyte of the battery, improve the service life of the battery, and ensure the battery performance of the battery.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to an electrolyte slow-release device and a soft-package lithium-ion battery with the electrolyte slow-release device. Background Art

[0002] In the later stages of a lithium-ion battery cycle, insufficient electrolyte can cause a cycle drop, which can affect the battery life.

[0003] Nowadays, the battery life is often increased by increasing the amount of electrolyte injected. If too much electrolyte is added, the following defects will occur:

[0004] This causes the soft-pack battery to be soft, which is not conducive to battery assembly;

[0005] Excessive free electrolyte may break through the packaging area of ​​the aluminum-plastic layer during battery manufacturing, thus reducing the yield rate.

[0006] Too much floating liquid in the battery can easily cause poor appearance. Utility Model Content

[0007] The utility model aims at the shortcomings of the prior art and provides an electrolyte slow-release device and a soft-pack lithium-ion battery with the electrolyte slow-release device.

[0008] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0009] An electrolyte slow-release device, comprising:

[0010] Sustained release structure;

[0011] Electrolyte;

[0012] An opening structure is provided on one side of the sustained-release structure;

[0013] The slow-release structure includes a container and at least one closure member, wherein the closure member is located on a side close to the opening structure;

[0014] The containing member and the closing member together form a sealed containing space, and the electrolyte is placed in the containing space;

[0015] The opening structure opens the sealing member when subjected to pressure, so that the electrolyte is released from the containing space.

[0016] As an implementable method:

[0017] The opening structure includes a fixing member and a piercing member;

[0018] The piercing member is provided with thorns corresponding to the sealing members one by one;

[0019] The piercing member is fixed to the containing member via the fixing member, and the corresponding spurs are in contact with the sealing member or there is a gap between the corresponding spurs and the sealing member.

[0020] As an implementable method:

[0021] At least one drainage port is provided on a side of the container close to the opening structure;

[0022] The sealing parts correspond to the drainage ports one by one, and the sealing parts are arranged at the corresponding drainage ports.

[0023] As an implementable method:

[0024] The container comprises a cylinder, an upper end of the cylinder is provided with an upper blocking member, and a lower end of the cylinder is provided with a lower blocking member;

[0025] The upper blocking member, the lower blocking member, the cylinder and the closing member together form a sealed accommodating inner cavity.

[0026] As an implementable method:

[0027] The container is a circular cylinder or a square cylinder.

[0028] As an implementable method:

[0029] The receiving member is made of PP material or resin material.

[0030] As an implementable method:

[0031] The opening structure is made of PP material or resin material.

[0032] As an implementable method:

[0033] The closure member is a PP film or a PE closure member;

[0034] When the closure member is a PE closure member, the closure member is embedded in the drainage port.

[0035] A soft-pack lithium-ion battery comprises a soft-pack battery cell and also comprises any one of the above-mentioned electrolyte slow-release devices.

[0036] As an implementable method;

[0037] The electrolyte slow-release device is located on one side or both sides of the soft-pack battery cell;

[0038] The opening structure of the electrolyte slow-release device is in contact with the soft-pack battery cell, and when the soft-pack battery cell expands, pressure is applied to the opening structure.

[0039] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0040] The utility model designs the opening structure and the closing piece so that when the battery cell expands, the opening structure can provide the force required to open the closing piece, so that the electrolyte flows out of the accommodating space to replenish the electrolyte of the battery, thereby increasing the service life of the battery and ensuring the battery performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a structural schematic diagram of an electrolyte slow-release device of the utility model;

[0043] Figure 2 yes Figure 1 The main view;

[0044] Figure 3 yes Figure 2 A cross-sectional view of

[0045] Figure 4 It is a structural schematic diagram of a sustained-release structure;

[0046] Figure 5 yes Figure 4 The main view;

[0047] Figure 6 The utility model is a structural schematic diagram of a soft-pack lithium-ion battery.

[0048] In the figure:

[0049] 100 is a slow-release structure; 110 is a container; 120 is a drainage port; 131 is an upper blocking member; 132 is a lower blocking member;

[0050] 200 is an opening structure; 210 is a piercing member; 211 is a stab; 220 is a fixing member; 221 is an upper fixing member; 222 is a lower fixing member;

[0051] 10 is a soft-pack battery cell; 20 is a slow-release device; and 30 is a termination tape. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below in conjunction with the embodiments. The following embodiments are intended to explain the present invention but the present invention is not limited to the following embodiments.

[0053] Example 1, an electrolyte slow-release device, comprising a slow-release structure 100 and an electrolyte, referring to Figure 1 :

[0054] An opening structure 200 is provided on one side of the slow-release structure 100;

[0055] The slow-release structure 100 includes a container 110 and at least one closure member, and the closure member is located on a side close to the opening structure 200;

[0056] The container 110 and the sealing member together form a sealed container space, and the electrolyte is placed in the container space;

[0057] The opening structure 200 opens the sealing member when subjected to pressure, so that the electrolyte is released from the containing space.

[0058] In actual application, as the battery is used, the battery cell will expand, thereby providing the opening structure 200 with the force required to open the closure, allowing the electrolyte to flow out of the accommodation space to replenish the electrolyte of the battery, thereby increasing the service life of the battery and ensuring the battery performance of the battery.

[0059] Reference Figures 1 to 3 :

[0060] The opening structure 200 includes a fixing member 220 and a piercing member 210;

[0061] The piercing member 210 is provided with thorns 211 corresponding to the sealing members one by one;

[0062] The piercing member 210 is fixed to the receiving member 110 via the fixing member 220 , and the corresponding spurs 211 are in contact with the sealing member or there is a gap between the corresponding spurs 211 and the sealing member.

[0063] This embodiment adopts the puncture method to open the closure. When the battery cell expands, pressure is applied to the piercing member 210. At this time, the piercing member 210 will deform in the direction close to the closure, that is, the spur 211 is close to the corresponding closure. After the spur 211 pierces the closure, the electrolyte will flow out of the container 110 from the puncture point, thereby realizing the slow release of the electrolyte.

[0064] In this embodiment, the position of the spur 211 on the piercing member 210 and the sealing member is relatively fixed by the design of the fixing member 220, so that the battery cell is not opened in the initial state, and the electrolyte is released when the battery cell expands to a certain extent.

[0065] Those skilled in the art may set the distance between the tip of the spur 211 and the sealing member according to actual needs, and this embodiment does not limit it in detail.

[0066] In this embodiment, the fixing member 220 includes an upper fixing member 221 and a lower fixing member 222;

[0067] The piercing member 210 and the upper end of the receiving member 110 are fixed by an upper fixing member 221;

[0068] The piercing member 210 and the lower end of the receiving member 110 are fixed to each other via a lower fixing member 222 .

[0069] Reference Figures 1 to 5 At least one drainage port 120 is provided on a side of the container 110 close to the opening structure 200 ; the closing member corresponds to the drainage port 120 one by one, and the closing member is provided at the corresponding drainage port 120 .

[0070] The closure member may be a PP film or a PE closure member;

[0071] When the closure is a PE closure, the closure is embedded in the drainage port 120. Those skilled in the art can set the number and distribution size of the drainage ports 120 according to actual needs. In this embodiment, multiple drainage ports 120 are arranged from top to bottom.

[0072] In this embodiment, the container 110 includes a cylinder, an upper end of the cylinder is provided with an upper blocking member 131, and a lower end of the cylinder is provided with a lower blocking member 132;

[0073] The upper blocking member 131 , the lower blocking member 132 , the cylinder and the closing member together form a sealed accommodating inner cavity.

[0074] like Figures 1 to 3 As shown, a square cylinder can be used, such as Figure 4 and 5 As shown, a circular cylinder may also be used, which is not limited in detail in this embodiment.

[0075] In this embodiment, the receiving member 110, the piercing member 210 and the fixing member 220 can all be made of PP material or resin material, and the piercing member 210 and the fixing member 220 are an integrally formed structure.

[0076] Reference Figures 1 to 3 As shown, the upper blocking member 131, the lower blocking member 132, the piercing member 210 and the fixing member 220 may be formed in an integral structure;

[0077] Reference Figure 4 and Figure 5 As shown, the upper blocking member 131 and the lower blocking member 132 may be independent components.

[0078] Embodiment 2, a soft-pack lithium-ion battery, comprising a soft-pack battery cell 10 and a slow-release device 20, wherein the slow-release device 20 is the electrolyte slow-release device described in Embodiment 1;

[0079] The number of the slow-release device 20 is 1 or 2;

[0080] When the number of the slow-release device 20 is 1, the slow-release device 20 can be set on any side of the soft-pack battery cell;

[0081] like Figure 6 As shown, when the number of the slow-release devices 20 is 2, the slow-release devices 20 are set on both sides of the soft-pack battery cell.

[0082] like Figure 6 As shown, the opening structure 200 of the slow-release device 20 is attached to the soft-pack battery core 10, and when the soft-pack battery core 10 expands, pressure is applied to the opening structure 200;

[0083] In this embodiment, the slow-release device 20 is fixed on both sides of the soft-pack battery cell 10 by using a termination tape 30, and the piercing member 210 of the opening structure 200 in each slow-release device 20 is in contact with the soft-pack battery cell 10. When the soft-pack battery cell 10 expands, pressure will be applied to the piercing member 210, and the piercing member 210 will be deformed by the force, so that the spurs 211 on the piercing member 210 are close to the corresponding closing member. When the closing member is pierced by the spurs 211, the electrolyte contained therein will be released.

[0084] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] It should be noted that:

[0086] The phrases "one embodiment" or "embodiment" mentioned in the specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0087] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0088] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different. All equivalent or simple changes made based on the structure, features and principles described in the concept of the utility model patent are included in the protection scope of the utility model patent. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. An electrolyte slow-release device, characterized in that: include: Sustained release structure; Electrolyte; An opening structure is provided on one side of the sustained-release structure; The slow-release structure includes a container and at least one closure member, wherein the closure member is located on a side close to the opening structure; The containing member and the closing member together form a sealed containing space, and the electrolyte is placed in the containing space; The opening structure opens the sealing member when subjected to pressure, so that the electrolyte is released from the containing space.

2. The electrolyte sustained-release device according to claim 1, characterized in that: The opening structure includes a fixing member and a piercing member; The piercing member is provided with thorns corresponding to the sealing member one by one; The piercing member is fixed to the containing member via the fixing member, and the corresponding spurs are in contact with the sealing member or there is a gap between the corresponding spurs and the sealing member.

3. The electrolyte sustained-release device according to claim 1 or 2, characterized in that: At least one drainage port is provided on a side of the container close to the opening structure; The sealing parts correspond to the drainage ports one by one, and the sealing parts are arranged at the corresponding drainage ports.

4. The electrolyte sustained-release device according to claim 3, characterized in that: The container comprises a cylinder, an upper end of the cylinder is provided with an upper blocking member, and a lower end of the cylinder is provided with a lower blocking member; The upper blocking member, the lower blocking member, the cylinder and the closing member together form a sealed accommodating inner cavity.

5. The electrolyte sustained-release device according to claim 4, characterized in that: The container is a circular cylinder or a square cylinder.

6. The electrolyte sustained-release device according to claim 1 or 2, characterized in that: The receiving member is made of PP material or resin material.

7. The electrolyte sustained-release device according to claim 1 or 2, characterized in that: The opening structure is made of PP material or resin material.

8. The electrolyte sustained-release device according to claim 3, characterized in that: The closure member is a PP film or a PE closure member; When the closure member is a PE closure member, the closure member is embedded in the drainage port.

9. A soft-pack lithium-ion battery, comprising a soft-pack battery cell, characterized in that: It also includes a sustained release device, which is the electrolyte sustained release device according to any one of claims 1 to 8.

10. The soft-pack lithium-ion battery according to claim 9, It is characterized by: The slow-release device is located on one side or both sides of the soft-pack battery cell; The opening structure of the slow-release device is in contact with the soft-pack battery core, and when the soft-pack battery core expands, pressure is applied to the opening structure.

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