CN219371270U - Battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and proposes a battery pack, comprising: a bottom support, an exhaust channel is formed on the bottom support; a plurality of batteries are arranged on the bottom support, and the side of the battery facing the bottom support is provided with a Pressure relief structure; wherein, along the height direction of the battery, the height of the exhaust channel is h, the capacity of the battery is A, 1Ah/mm≤A/h≤30Ah/mm, not only can ensure that after the pressure relief structure bursts, the discharge The gas channel can discharge the gas inside the battery in time, avoiding safety risks between adjacent batteries, and can ensure the space utilization of the battery pack.

Description

Battery

technical field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background technique

In related technologies, a battery pack can include multiple batteries. During the charging and discharging process, a large amount of heat will be generated by the battery. In some cases, the battery needs to release the gas through the explosion of the pressure relief structure, so as to ensure the safety of the battery. However, due to the structural limitations of the battery pack, it may affect the gas discharge capability, thereby affecting the safety performance of the battery pack.

Utility model content

The utility model provides a battery pack to improve the service performance of the battery pack.

The utility model provides a battery pack, comprising:

Bottom support, the bottom support forms an exhaust channel;

A plurality of batteries, the plurality of batteries are arranged on the bottom support, and the side of the battery facing the bottom support is provided with a pressure relief structure;

Wherein, along the height direction of the battery, the height of the exhaust channel is h, the capacity of the battery is A, and 1Ah/mm≤A/h≤30Ah/mm.

The battery pack of the embodiment of the present invention includes a bottom support and a plurality of batteries, and the plurality of batteries are arranged on the bottom support. By forming an exhaust channel on the bottom support, the pressure relief structure of the battery is arranged towards the bottom support, so that the battery can be vented After the pressure structure explodes, the gas inside the battery can enter the exhaust channel, so as to avoid affecting the adjacent batteries and improve the safety performance of the battery pack. In the height direction of the battery, the height of the exhaust channel is h, and the height of the battery The capacity is A, 1Ah/mm≤A/h≤30Ah/mm, which can not only ensure that after the pressure relief structure explodes, the exhaust channel can discharge the gas inside the battery in time, avoiding safety risks between adjacent batteries, and can ensure Space utilization of the battery pack.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following figures. Components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may be arranged differently as known in the art. In addition, in the drawings, the same reference numerals denote the same or similar components in the respective drawings.

in:

Fig. 1 is a schematic structural diagram of a battery pack shown according to an exemplary embodiment;

Fig. 2 is a schematic diagram showing an exploded structure of a battery pack according to an exemplary embodiment;

Fig. 3 is a schematic structural diagram of a battery pack according to another exemplary embodiment;

Fig. 4 is a schematic structural diagram of a bottom support of a battery pack according to an exemplary embodiment.

The reference signs are explained as follows:

10. Bottom support; 11. Exhaust channel; 111. Sub-channel; 20. Battery; 21. Pressure relief structure; 30. Battery box.

Detailed ways

The following will clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only, and are not intended to limit the protection scope of the present disclosure, so it should be understood that various modifications can be made to the exemplary embodiments without departing from the protection scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" is means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" or "an" are likewise intended to mean one of a possible plurality of such objects.

Unless otherwise specified or explained, the terms "connected" and "fixed" should be interpreted in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integral connection, or electrical connection, or Connection; "connection" can be a direct connection or an indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

Furthermore, in the description of the present disclosure, it should be understood that the orientation words such as "upper", "lower", "inner" and "outer" described in the exemplary embodiments of the present disclosure are based on the angles shown in the drawings It should not be construed as limiting the example embodiments of the present disclosure. It also needs to be understood that in this context, when an element or feature is referred to as being "on," "under," or "inside" or "outside" another element(s), it is not only a direct connection In other (one or more) elements "on", "under" or "inside", "outside", it can also be indirectly connected to another (one or more) elements "on", "under" or "outside" through intermediate elements inside and outside".

An embodiment of the present utility model provides a battery pack, please refer to Figure 1 to Figure 4, the battery pack includes: a bottom support 10, the bottom support 10 is formed with an exhaust channel 11; a plurality of batteries 20, a plurality of batteries 20 are arranged On the bottom support 10, the side of the battery 20 facing the bottom support 10 is provided with a pressure relief structure 21; wherein, along the height direction of the battery 20, the height of the exhaust channel 11 is h, and the capacity of the battery 20 is A, 1Ah/ mm≤A/h≤30Ah/mm.

The battery pack in one embodiment of the present invention includes a bottom support 10 and a plurality of batteries 20, and a plurality of batteries 20 are arranged on the bottom support 10, and an exhaust passage 11 is formed on the bottom support 10, and the pressure relief structure of the batteries 20 21 is set toward the bottom support 10, so that after the pressure relief structure 21 explodes, the gas inside the battery 20 can enter the exhaust channel 11, so as to avoid affecting the adjacent battery 20 and improve the safety performance of the battery pack. In the height direction, the height of the exhaust passage 11 is h, the capacity of the battery 20 is A, 1Ah/mm≤A/h≤30Ah/mm, not only can ensure that after the pressure relief structure 21 bursts, the exhaust passage 11 can be timely The gas inside the battery 20 is exhausted to avoid safety risks between adjacent batteries 20 and to ensure the space utilization of the battery pack.

It should be noted that the battery 20 has a pressure relief structure 21, and the pressure relief structure 21 is arranged toward the bottom support 10. The pressure relief structure 21 can be an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, etc., and the internal pressure of the battery 20 reaches At a certain height, the pressure relief structure 21 is opened to realize pressure relief inside the battery 20 .

By setting the pressure relief structure 21 toward the bottom support 10, after the pressure relief structure 21 is opened, the gas and liquid discharged from the inside of the battery 20 will not easily rise to the top of the battery pack, which can improve the safety performance of the battery pack to a certain extent.

As shown in FIG. 3 , along the height direction of the battery 20, the height of the exhaust passage 11 is denoted as h, and the capacity of the battery 20 is A, that is, the capacity of each battery 20 is A. By making the capacity A of the battery 20 and The ratio between the height h of the exhaust passage 11 is 1Ah/mm-30Ah/mm, so that the relationship between the capacity of the battery 20 and the height of the exhaust passage 11 can be effectively controlled to ensure that after the pressure relief structure 21 bursts open, the discharge The air channel 11 can discharge the gas inside the battery 20 in time, avoiding safety risks between adjacent batteries 20, and can also ensure the space utilization of the battery pack, thereby improving the performance of the battery pack. The height direction of the battery 20 can be represented as X.

When the ratio between the capacity A of the battery 20 and the height h of the exhaust channel 11 is greater than 30Ah/mm, after the pressure relief structure 21 explodes, there may be a problem that the exhaust channel 11 cannot discharge the gas inside the battery in time, so that The gas will affect the adjacent battery 20, and then there may be a safety risk; and when the ratio between the capacity A of the battery 20 and the height h of the exhaust channel 11 is less than 1Ah/mm, the exhaust channel 11 will occupy more space inside the battery pack. Large space, thereby affecting the space utilization of the battery pack, and also the problem of weak structural strength of the bottom support 10, which poses a safety risk.

The ratio between the capacity A of the battery 20 and the height h of the exhaust channel 11 can be 1Ah/mm, 2Ah/mm, 3Ah/mm, 4Ah/mm, 5Ah/mm, 10Ah/mm, 15Ah/mm, 16Ah/mm , 20Ah/mm, 21Ah/mm, 22Ah/mm, 24Ah/mm, 25Ah/mm, 26Ah/mm, 27Ah/mm, 28Ah/mm, 29Ah/mm or 30Ah/mm, etc.

It should be noted that a battery includes a battery cell and an electrolyte, and is the smallest unit capable of electrochemical reactions such as charging/discharging. The battery core refers to a unit formed by winding or laminating a stacked part, and the stacked part includes a first pole piece, a separator, and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein, the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active material.

In one embodiment, the battery 20 may be a quadrangular prism battery. The quadrangular prism battery mainly refers to a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corner between the sides It does not have to be a right angle, but can be a circular arc transition.

The battery can be a stacked battery, which is not only convenient for grouping, but also can be processed to obtain a battery with a long length. Specifically, the electric core is a laminated electric core, and the electric core has a first pole piece stacked on each other, a second pole piece electrically opposite to the first pole piece, and a pole piece arranged between the first pole piece and the second pole piece. The separator sheet, so that multiple pairs of the first pole piece and the second pole piece are stacked to form a laminated battery cell.

Alternatively, the battery can be a wound battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the diaphragm sheet arranged between the first pole piece and the second pole piece are wound, Obtain a coiled battery.

In one embodiment, battery 20 may be a cylindrical battery. The battery can be a winding battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a rolled battery. Winding core.

In one embodiment, the capacity of the battery 20 is A, 20Ah≤A≤50Ah, that is, the capacity range of the battery 20 can be 20Ah-50Ah, so as to ensure that the battery 20 can have a reliable charge and discharge capability and ensure the performance of the battery pack .

The battery 20 can be a cylindrical battery, and the capacity A of the battery 20 can be 20Ah, 21Ah, 22Ah, 25Ah, 26Ah, 27Ah, 28Ah, 30Ah, 31Ah, 32Ah, 35Ah, 36Ah, 37Ah, 38Ah, 39Ah, 40Ah, 41Ah, 42Ah, 43Ah, 45Ah, 46Ah, 47Ah, 48Ah or 50Ah, etc.

In one embodiment, along the height direction of the battery 20, the height of the exhaust channel 11 is h, 2mm≤h≤20mm, that is, the height of the exhaust channel 11 can be 2mm-20mm, so as to ensure that the exhaust channel 11 can On the basis of having a reliable exhaust capacity, the problem that the height of the exhaust channel 11 is too large and occupies too much space of the battery pack can also be avoided.

The height h of the exhaust channel 11 can be 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 9mm, 10mm, 12mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm and so on.

In one embodiment, the number of multiple batteries 20 is n, the volume of the exhaust channel 11 is V, 0.1Ah/mm ³ ≤ nA/V ≤ 100Ah/mm ³ , 300 ≤ n ≤ 1200, and the batteries included in the battery pack The number of 20 is between 300 and 1200, so as to ensure that the battery pack can have a reliable capacity, and the volume of the exhaust passage 11 is used to ensure the exhaust capacity of the battery pack, thereby improving the safe use performance of the battery pack.

The number of multiple batteries 20 is n, and the capacity of the battery 20 is A, nA is the overall capacity of the battery pack, and the overall volume of the exhaust channel 11 is V, that is, the gas volume that the exhaust channel 11 can hold can be V , by making the ratio of the overall capacity nA of the battery pack to the overall volume V of the exhaust channel 11 be 0.1Ah/mm ³ -100Ah/mm ³ , not only the capacity of the battery pack can be ensured, the exhaust capacity of the battery pack can be improved, but also The space utilization rate of the battery pack can be guaranteed, thereby ensuring the capacity density of the battery pack.

The ratio of the overall capacity nA of the battery pack to the overall volume V of the exhaust channel 11 can be 0.1Ah/mm ³ , 0.2Ah/mm ³ , 0.3Ah/mm ³ , 0.5Ah/mm ³ , 0.8Ah/mm ³ , 1Ah /mm ³ , 5Ah/mm ³ , 10Ah/mm ³ , 15Ah/mm ³ , 18Ah/mm ^{3 , 20Ah/mm 3 ,} 22Ah/mm ³ , 25Ah/mm ³ , 30Ah/mm ³ , 35Ah/mm ³ , 40Ah /mm ³ , 45Ah/mm ³ , 50Ah/mm ³ , 55Ah/mm ³ , 60Ah/mm ³ , 65Ah/mm ³ , 70Ah/mm ³ , 75Ah/mm ³ , 80Ah/mm ³ , 85Ah/mm ³ , 90Ah /mm ³ , 95Ah/mm ³ , 98Ah/mm ³ or 100Ah/mm ³ and so on.

The number n of multiple batteries 20 can be 300, 310, 320, 330, 350, 380, 400, 450, 500, 520, 528, 600, 650, 700, 750, 792, 800, 900, 1000, 1050, 1100 , 1150 or 1200 and so on.

A plurality of batteries 20 can form a plurality of battery rows, and a plurality of batteries 20 can form an array structure. The arrangement of the plurality of batteries 20 is not limited here, and can be selected according to actual needs.

In one embodiment, the battery 20 is a cylindrical battery, and the diameter of the battery 20 is 40mm-80mm, so that the battery 20 can have a relatively large size and the capacity of the battery 20 can be ensured.

The diameter of the battery 20 may range from 40mm to 80mm, for example, the diameter of the battery 20 may be 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm or 80mm and so on.

In one embodiment, a plurality of batteries 20 form a plurality of battery rows, and the exhaust passage 11 includes a plurality of sub-channels 111, and the plurality of sub-channels 111 are set corresponding to the plurality of battery rows, thereby ensuring that each battery row can pass through the corresponding The sub-channel 111 realizes gas discharge, thereby improving the safety performance of the battery pack.

As shown in FIG. 4 , the exhaust channel 11 may be composed of multiple sub-channels 111 . A plurality of sub-channels 111 may respectively correspond to a plurality of battery rows, each battery row includes a plurality of batteries 20, and the plurality of sub-channels 111 may be connected, or, the plurality of sub-channels 111 may not be connected, which is not limited herein, for example, a plurality of sub-channels 111 may be connected to each other. The sub-channels 111 can eventually lead into an integral gas collection chamber.

The specific structure of the sub-channel 111 itself is not limited here. For example, the sub-channel 111 can include a rectangular channel and an opening, etc., and the pressure relief structure 21 can be arranged opposite to the opening of the sub-channel 111, thereby ensuring that the pressure relief structure 21 can Reliable explosion, thereby improving the protection performance of the pressure relief structure 21 for the battery 20 .

In one embodiment, the exhaust channel 11 is only formed by the bottom support 10, that is, the bottom support 10 itself has an exhaust channel 11, so as to realize the pressure relief of the battery pack.

The bottom support 10 can be a bracket, for example, a plurality of batteries 20 can be arranged on the bracket, and the battery pack can also include a battery case, and the plurality of batteries 20 can be installed in the battery case through the bottom support 10 . There is an exhaust channel 11 inside the bracket, and the gas discharged from the battery 20 can be discharged through the bracket, which can simplify the overall structure of the battery pack to a certain extent.

The bottom support 10 may be the bottom structure of the battery box, and a plurality of batteries 20 may be arranged in the battery box. The bottom structure of the battery case has an exhaust channel 11 .

In one embodiment, as shown in FIG. 1, the battery pack further includes a battery case 30, the bottom support 10 is arranged in the battery case 30, and the exhaust channel 11 is formed by the bottom support 10 and the battery case 30, that is, the bottom support There may be an exhaust passage 11 between the battery case 10 and the battery case 30, so as to increase the discharge path of the exhaust passage 11 and improve the safety performance of the battery pack to a certain extent.

A plurality of batteries 20 can be arranged in the battery case 30 through the bottom support 10, for example, the bottom support 10 has a chamber, the chamber can communicate with the inner space of the battery case 30, after the gas enters the chamber, it can be passed through The battery case 30 is discharged.

In one embodiment, the ratio of the height of the battery 20 to the height of the exhaust channel 11 is 0.5-100, so that the space occupied by the exhaust channel 11 can be reliably controlled, and on the basis that the exhaust channel 11 can reliably discharge gas , can also avoid the problem that the exhaust channel 11 occupies too much space of the battery pack, thereby ensuring the energy density of the battery pack, and can ensure the safe use performance of the battery pack.

The ratio of the height of the battery 20 to the height of the exhaust channel 11 can be 0.5, 0.6, 0.8, 1, 1.5, 2, 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 , 60, 65, 70, 75, 80, 85, 90, 95, 98, or 100, etc.

In one embodiment, the bottom support 10 can be substantially rectangular, and the bottom support 10 can have a recess for accommodating the battery 20. For example, the battery 20 can be a cylindrical battery, and each cylindrical battery can be respectively arranged on each of the bottom support 10. In the depression, the position of the cylindrical battery can be realized, and the safety and stability of the cylindrical battery can be ensured. The bottom of the depression can have a through hole communicating with the exhaust channel 11, so that the pressure relief structure 21 of the battery 20 can be realized in the Explode under a certain pressure, and the gas inside the battery 20 can enter the exhaust channel 11, thereby ensuring the safe performance of the battery pack and avoiding the problem of gas spreading everywhere.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the utility model innovation disclosed herein. This disclosure is intended to cover any modification, use or adaptation of the present utility model, and these modifications, uses or adaptations follow the general principles of this disclosure and include common knowledge or conventional techniques in the technical field not disclosed in this disclosure means. The specification and example embodiments are to be considered as exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery pack, characterized in that, comprising: a bottom support (10), the bottom support (10) is formed with an exhaust channel (11); A plurality of batteries (20), the plurality of batteries (20) are arranged on the bottom support (10), and the side of the batteries (20) facing the bottom support (10) is provided with a pressure relief structure (21 ); Wherein, along the height direction of the battery (20), the height of the exhaust channel (11) is h, the capacity of the battery (20) is A, 1Ah/mm≤A/h≤30Ah/mm. 2. The battery pack according to claim 1, characterized in that, the battery (20) is a cylindrical battery. 3. The battery pack according to claim 1, wherein 20Ah≤A≤50Ah. 4. The battery pack according to claim 1, wherein 2mm≤h≤20mm. 5. The battery pack according to claim 1, characterized in that, the number of the plurality of batteries (20) is n, the volume of the exhaust channel (11) is V, and 0.1Ah/mm ³ ≤ nA/ V≤100Ah/mm ³ , 300≤n≤1200. 6. The battery pack according to claim 5, characterized in that, the battery (20) is a cylindrical battery, and the diameter of the battery (20) is 40mm-80mm. 7. The battery pack according to any one of claims 1 to 6, characterized in that, a plurality of the batteries (20) form a plurality of battery rows, and the exhaust channel (11) includes a plurality of sub-channels (111 ), a plurality of sub-channels (111) are set corresponding to a plurality of battery columns. 8. The battery pack according to any one of claims 1 to 6, characterized in that the exhaust channel (11) is only formed by the bottom support (10). 9. The battery pack according to any one of claims 1 to 6, characterized in that, the battery pack further comprises a battery box (30), and the bottom support (10) is arranged on the battery box ( 30), the exhaust channel (11) is formed by the bottom support (10) and the battery case (30). 10. The battery pack according to any one of claims 1-6, characterized in that the ratio of the height of the battery (20) to the height of the exhaust channel (11) is 0.5-100.