Power battery structure capable of being rapidly infiltrated

Abstract

The utility model provides a power battery structure capable of rapidly infiltrating, which comprises a naked battery cell, an insulating film sleeving the outer side surface of the naked battery cell, and a shell sleeving the outer side surface of the insulating film, and the shell abuts against a top cover of the naked battery cell; the insulating film is matched with the naked battery cell; a plurality of imprint grooves are circumferentially formed in the side surface, close to the shell, of the insulating film, and the plurality of imprint grooves are arranged in parallel; and each imprint groove extends from the bottom of the insulating film to the opening end of the insulating film. The device is simple in structure and low in cost, the infiltration effect of the battery can be improved without any external device, the performance of the battery cell can be effectively improved, the device can be directly improved on the basis of an original battery cell, the production process does not need to be additionally increased or changed, and the problem that a large-capacity battery shell is too large and too high, and the production cost is low can be effectively solved. And the electrolyte cannot effectively infiltrate the middle upper part of the battery.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric conductance technical field especially relates to a power battery structure of quick infiltration. BACKGROUND

[0002] Power batteries (such as lithium ion batteries and sodium ion batteries) have the advantages of high voltage, long cycle life and long storage time, and are widely used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations.

[0003] The electrolyte is an ion conductor between the positive and negative electrodes of the power battery, and transports ions between the positive and negative electrodes during charging and discharging. The electrolyte has a great influence on the charging and discharging performance (rate high temperature), life (cycle storage) and temperature range of the battery. When the electrolyte has poor infiltration effect, the ion transport path is long, which hinders the shuttling of ions between the positive and negative electrodes, and the electrode pieces not in contact with the electrolyte cannot participate in the electrochemical reaction of the battery. At the same time, the interface resistance of the battery increases, affecting the rate performance, discharge capacity and service life of the battery. Moreover, due to the large volume of the square battery, the internal space is small, and the electrode piece density is large, resulting in slow liquid injection speed and long infiltration time. SUMMARY

[0004] The utility model embodiment provides a kind of power battery structure of quick infiltration, to solve the problems such as the rate performance, discharge capacity and service life of battery are affected by the slow liquid injection speed and long infiltration time of existing power battery.

[0005] To achieve the above object, the utility model embodiment provides a kind of power battery structure of quick infiltration, including bare electric core, the insulating film of the outer side of bare electric core is set and the shell of the outer side of the insulating film is set, the shell is arranged with the top cover of bare electric core and meets;The insulating film is compatible with the bare electric core and is set;The side of the insulating film close to the shell is circumferentially provided with a plurality of imprint grooves, and a plurality of imprint grooves are arranged parallel to each other;Each imprint groove is arranged from the bottom of the insulating film to the opening end of the insulating film.

[0006] As a preferred embodiment, each imprint groove has an inclination from the bottom of the insulating film to the opening end of the insulating film.

[0007] As a preferred embodiment, the insulating film and a plurality of imprint grooves are integrally formed; when the shell is set on the outer side of the insulating film, a plurality of imprint grooves and the inner side of the shell form a plurality of hollow channels through the bottom of the shell.

[0008] As a preferred implementation form, the depth of the imprint groove is half of the width of the imprint groove; each of the imprint grooves has the same structure.

[0009] As a preferred implementation form, the depth of each of the imprint grooves is the same; the depth of the imprint groove is less than the thickness of the insulation film.

[0010] As a preferred implementation form, each of the imprint grooves is arranged in communication with the shell; each of the imprint grooves is arranged at equal intervals.

[0011] As a preferred implementation form, the cross section of each of the imprint grooves is a semicircular section; the imprint groove is a long strip-shaped imprint groove or an arc-shaped imprint groove.

[0012] As a preferred implementation form, the bare electric core comprises the top cover and at least two electric core units arranged side by side, each of the electric core units is connected with the top cover; a gap is arranged between the top cover and the insulation film.

[0013] As a preferred implementation form, the power battery structure is one of a lithium ion battery structure, a sodium ion battery structure or a zinc ion battery structure.

[0014] Compared with the prior art, the application has the following beneficial effects: the utility model discloses a plurality of imprint grooves are arranged on the side of the insulation film close to the shell and the arrangement mode of the imprint groove is controlled, after the bare electric core is installed in the shell, each imprint groove and the inner side of the shell form a hollow channel, after the bare electric core is wrapped with the insulation film and injected into the shell, when the electrolyte in the imprint groove area is consumed, a local vacuum is formed in the corresponding area, the internal pressure of the imprint groove is less than the external pressure, the residual electrolyte of the battery shell and the bottom is sucked into the imprint groove, and the electrolyte of the bare electric core is supplemented, thereby the utilization rate of the residual electrolyte and the cycle life of the battery are increased. The application has the advantages of simple structure and low cost, and can improve the soaking effect of the battery itself without the help of any external device, effectively improve the performance of the electric core, the device can be directly improved on the basis of the original electric core, does not need to increase or change the production process, and can effectively solve the problem that the large-capacity battery shell is too large and high, so that the electrolyte cannot be effectively soaked in the upper part of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0016] Figure 1It is the whole structure schematic view of the power battery structure capable of quick infiltration according to an embodiment of the utility model;

[0017] Figure 2 It is Figure 1 It is the explosion structure schematic view of the power battery structure capable of quick infiltration.

[0018] Figure 3 It is Figure 1 It is the internal schematic view of the power battery structure capable of quick infiltration. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0020] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, top, bottom, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, if the specific posture changes, the directional indications also change accordingly.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element.

[0023] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the same or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0024] Specifically, as shown in Figures 1 to 3 The utility model discloses a kind of quick infiltration power battery structures, including bare cell 10, insulating film 20 of being set on the outer side of the bare cell 10 and shell 30 of being set on the outer side of the insulating film 20, the shell 30 is arranged with the top cover 11 of the bare cell 10;The insulating film 20 is adapted to be arranged with the bare cell 10;The insulating film 20 is circumferentially provided with several imprint grooves 21 on the side close to the shell 30, several imprint grooves 21 are arranged in parallel with each other;Each imprint groove 21 is arranged from the bottom 22 of the insulating film 20 to the opening end 23 of the insulating film 20.

[0025] As a preferred embodiment, from the bottom 22 of the insulating film 20 to the opening end 23 of the insulating film 20, each imprint groove 21 has an inclination; the opening end 23 is one end of the insulating film 20 close to the top cover 11.

[0026] Specifically, in the present application, the degree of inclination can be set according to actual needs, and it is generally appropriate to set 15° to 35°, so that the battery shell and the residual electrolyte at the bottom can be absorbed into the imprint groove as much as possible, effectively ensuring the infiltration performance of the battery, and effectively reducing the difficulty of preparation process, so that the preparation is easy to realize.

[0027] As a preferred embodiment, the insulating film 20 is integrally formed with the several imprint grooves 21; when the shell 30 is set on the outer side of the insulating film 20, the several imprint grooves 21 and the inner side of the shell 30 form several hollow channels penetrating through the bottom of the shell 30. In this way, after the bare cell is wrapped with the insulating film and injected into the shell, when the electrolyte in the imprint groove area is consumed, a local vacuum will be formed in the corresponding area, resulting in that the pressure inside the imprint groove is less than the external pressure, so that the battery shell and the residual electrolyte at the bottom are absorbed into the imprint groove, so that the electrolyte of the bare cell is supplemented, thereby increasing the utilization rate of residual electrolyte and the cycle life of the battery.

[0028] As a preferred embodiment, the depth of the indentation groove 21 is half of the width of the indentation groove 21; each of the indentation grooves 21 has the same structure. In this way, the battery shell and the bottom residual electrolyte can be absorbed into the indentation groove as much as possible, effectively ensuring the wettability of the battery, and effectively reducing the difficulty of the preparation process, so that the preparation is easy to implement.

[0029] As a preferred embodiment, the depth of each of the indentation grooves 21 is the same; the depth of the indentation groove 21 is less than the thickness of the insulating film 20. In this way, the battery shell and the bottom residual electrolyte can be absorbed into the indentation groove as much as possible, effectively ensuring the wettability of the battery, and effectively reducing the difficulty of the preparation process, so that the preparation is easy to implement.

[0030] As a preferred embodiment, each of the indentation grooves 21 is arranged in communication with the shell 30; each of the indentation grooves 21 is arranged at equal intervals. In this way, the battery shell and the bottom residual electrolyte can be absorbed into the indentation groove as much as possible, effectively ensuring the wettability of the battery.

[0031] As a preferred embodiment, the cross section of each of the indentation grooves 21 is a semicircular cross section; the indentation groove 21 is a long strip-shaped indentation groove or an arc-shaped indentation groove. In this way, the battery shell and the bottom residual electrolyte can be absorbed into the indentation groove as much as possible, effectively ensuring the wettability of the battery, and effectively reducing the difficulty of the preparation process, so that the preparation is easy to implement.

[0032] As a preferred embodiment, the bare cell 10 includes the top cover 11 and at least two parallel arranged cell units 12, each of the cell units 12 is connected with the top cover 11; a gap is arranged between the top cover 11 and the insulating film 20.

[0033] As a preferred embodiment, the power battery structure is one of a lithium ion battery structure, a sodium ion battery structure or a zinc ion battery structure. In the embodiment of the present application, the power battery structure is a square shell battery.

[0034] The utility model discloses a kind of battery shell structures, including shell, bare electric core and insulating film, bare electric core is wrapped by insulating film, and bare electric core is arranged in shell, and insulating film is arranged on the inner side of shell, and a plurality of trace grooves are arranged on the side of insulating film close to shell, and the trace groove is arranged in the hollow channel formed by each trace groove and the inner side of shell after bare electric core is installed in shell, and the electrolyte of trace groove area is consumed, and local vacuum is formed in corresponding area, so that the pressure inside trace groove is less than the pressure outside, so that the residual electrolyte of battery shell and bottom is sucked into trace groove, and the electrolyte of bare electric core is replenished, to increase the utilization of residual electrolyte and the cycle life of battery.

[0035] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0037] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-infiltrable power battery structure, characterized in that, The power battery structure comprises a bare battery core, an insulating film sleeved on the outer side surface of the bare battery core, and a shell sleeved on the outer side surface of the insulating film, wherein the shell is in abutment with the top cover of the bare battery core; the insulating film is in matched arrangement with the bare battery core; the insulating film is circumferentially provided with a plurality of trace grooves on the side surface close to the shell, and the plurality of trace grooves are arranged in parallel with each other; each of the trace grooves is arranged from the bottom of the insulating film to the opening end of the insulating film.

2. The fast-infiltratable power cell structure of claim 1, wherein, Each of the trace grooves has an inclination from the bottom of the insulating film to the opening end of the insulating film; the opening end is one end of the insulating film close to the top cover.

3. The fast-infiltratable power cell structure of claim 1, wherein, The insulating film and the plurality of trace grooves are integrally formed; when the shell is sleeved on the outer side surface of the insulating film, the plurality of trace grooves and the inner side surface of the shell form a plurality of hollow channels penetrating through the bottom of the shell.

4. The fast-infiltratable power cell structure of claim 1, wherein, The depth of the trace groove is half of the width of the trace groove; each of the trace grooves has the same structure.

5. The fast-infiltratable power cell structure of claim 1, wherein, The depth of each of the trace grooves is the same; the depth of the trace groove is smaller than the thickness of the insulating film.

6. The fast-infiltratable power cell structure of claim 1, wherein, Each of the trace grooves is in communication with the shell; each of the trace grooves is arranged at equal intervals.

7. The fast-infiltratable power cell structure of claim 1, wherein, The cross section of each of the trace grooves is a semicircular cross section; the trace groove is a long strip-shaped trace groove or an arc-shaped trace groove.

8. The fast-infiltratable power cell structure of claim 1, wherein, The bare battery core comprises the top cover and at least two parallel arranged battery core units, each of the battery core units is connected with the top cover; a gap is arranged between the top cover and the insulating film.

9. The fast-infiltratable power cell structure of claim 1, wherein, The power battery structure is one of a lithium ion battery structure, a sodium ion battery structure or a zinc ion battery structure.

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