Short circuit prevention battery system for side-out explosion-proof valve battery

Abstract

The utility model discloses an anti-short-circuit battery system for a side-out anti-explosion valve battery, and belongs to the technical field of thermal safety of power batteries. The battery pack comprises a plurality of groups of battery cells, wherein the plurality of groups of battery cells are placed in a box body; an integrated cover plate is arranged on the battery cell, the integrated cover plate comprises a pole piece and a tray, the pole piece is connected with the battery cell, and meanwhile, the pole piece is mounted on the tray; the tray is provided with a baffle plate at the position of the pole piece, a groove is arranged between the baffle plate and the pole piece, and the groove is filled with insulating glue. According to the utility model, the baffle plates are arranged at the positions of the pole pieces connected with the battery cell, the baffle plates define the grooves, and the insulating glue is injected into the grooves and wraps the pole pieces, so that when electrolyte is sprayed out, the insulating glue can block the electrolyte so as not to be in contact with the pole pieces, thereby preventing high-temperature particulate matters and high-temperature electrolyte from melting the tray and conducting the adjacent pole pieces; therefore, local short circuit or even system short circuit is caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery thermal safety technical field, specifically, relate to a kind of short-circuit prevention battery system for side-out explosion valve battery. BACKGROUND

[0002] At present, developing new energy power battery is the trend of the times, lithium battery advances to higher energy density, especially large-capacity battery pack system, with higher and higher safety risk, it is urgent to establish the research to improve its safety, and the key problem is power battery thermal runaway research;

[0003] System thermal runaway is various, for the CTP system of large-capacity side-out pole piece, the voltage difference between modules is large, especially the voltage difference between system total positive and total negative can reach several hundred to several thousand volts, when battery thermal runaway occurs, electrolyte in cell is sprayed to pole piece or electrolyte melts cell blue film, short circuit is easily formed, not only electrolyte, but also particles sprayed by cell thermal runaway can also conduct positive and negative, causing system short circuit, which poses a high challenge to system safety. SUMMARY

[0004] 1. The technical problem to be solved by the utility model

[0005] The utility model provides a kind of short-circuit prevention battery system for side-out explosion valve battery, protective structure is set on battery pole piece, battery pole piece is protected, when electrolyte in cell is sprayed, it will not be sprayed to battery pole piece, avoid short circuit of battery pack, meanwhile, insulating heat-conducting adhesive can help pole piece to radiate heat.

[0006] 2. Technical scheme

[0007] To achieve the above purpose, the technical scheme provided by the utility model is as follows:

[0008] The utility model provides a kind of short-circuit prevention battery system for side-out explosion valve battery, including multiple groups of cells, the multiple groups of cells are placed in box body;Integrated cover plate is set on the cell, the integrated cover plate includes pole piece and tray, the pole piece is connected with cell, and the pole piece is installed on the tray;The tray is provided with baffle at the position of pole piece, recess is formed between the baffle and pole piece, and insulating adhesive is filled in the recess.The utility model is provided with baffle at the position of pole piece connected with cell, baffle forms recess, and insulating adhesive is injected in recess, insulating adhesive wraps pole piece, when electrolyte is sprayed, insulating adhesive will block electrolyte, so that it will not contact with pole piece, thereby avoiding that pole piece is fused tray due to electrolyte, arc short circuit between pole pieces, or short circuit is formed between pole pieces by thermal runaway particles falling.

[0009] As a further improvement to the present invention, the insulating adhesive is thermally conductive, connected to the battery pack's liquid cooling plate, and tightly adheres to the electrode. This arrangement connects the electrode to the liquid cooling plate using the thermally conductive insulating adhesive, thereby helping to dissipate heat from the electrode and further improving the heat dissipation efficiency of the battery pack.

[0010] As a further improvement of the present invention, the housing includes an outer shell, the end surface of the outer shell located at the housing opening being a sealing portion, and a protective platform is provided on the inner edge of the sealing portion, the protective platform extending outward from the sealing portion toward the housing opening. This arrangement allows the protective platform to protect the sealing portion and the housing when high-temperature gas or high-temperature particulate matter is ejected, thereby blocking the high-temperature gas, particulate matter, electrolyte, etc., preventing the high-temperature gas, particulate matter, and electrolyte from damaging the battery system seal and air from entering the battery system, thereby preventing dangerous accidents such as fire and explosion in the battery system.

[0011] As a further improvement of the present invention, a sealing member is provided on the sealing portion, and the height of the protective platform is greater than the height of the compressed sealing member. With this arrangement, the protective platform can protect the sealing member after the box is sealed, preventing damage to the sealing member from high-temperature gases, particulate matter, and electrolyte, thereby preventing dangerous accidents such as fire and explosion in the battery system.

[0012] As a further improvement of the present invention, the tray further comprises a connecting plate, the connecting plate is connected to the card slot, and the electrode piece is locked in the card slot. In this way, the electrode piece can be firmly connected to the tray.

[0013] As a further improvement of the present invention, the baffle is connected to the slot, and the baffle and the slot together form a groove. This arrangement can ensure that the filled insulating glue is located at the pole piece position and can be in close contact with the pole piece.

[0014] As a further improvement of the present invention, the integrated cover plate further includes an FPC board, the FPC board including a collector plate and contacts, and the electrode piece is electrically connected to the collector plate via the contacts. This arrangement enables the current on the battery cell to be conducted through the collector plate.

[0015] As a further improvement of the present invention, the contact is connected to the collector plate via an elastic member. In this way, the elastic member allows the contact to have a certain rebound space, and the FPC board can be installed and adjusted.

[0016] As a further improvement of the present invention, a storage space is formed in the box, and a plurality of staggered crossbeams and partitions are provided in the storage space to separate the plurality of battery cell groups in the storage space. This arrangement reduces interference between the battery cell groups.

[0017] As a further improvement of the utility model, the liquid cooling plate is arranged at the bottom of the battery cell in the battery cell group.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical scheme has the following remarkable effects:

[0020] The utility model discloses a baffle is arranged at the position of pole piece connected with battery cell, and the baffle surrounds the recess, and the recess is injected with insulating glue, and the insulating glue wraps pole piece, when electrolyte sprays, insulating glue will high-temperature gas, high-temperature particulate matter block, so that it will not contact pole piece, thereby avoiding pole piece because of electrolyte melting tray, arc short circuit between pole piece, or heat runaway particulate matter falls into pole piece and forms short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic view of the battery pack's box of the utility model;

[0022] Figure 2 It is Figure 1 It is the structure enlarged view of A in the utility model;

[0023] Figure 3 It is the structure schematic view of the integrated cover plate of the battery pack of the utility model;

[0024] Figure 4 It is the structure schematic view of FPC board in the utility model;

[0025] Figure 5 It is the structure schematic view of tray in the utility model;

[0026] Figure 6 It is the rear view of tray in the utility model.

[0027] Label explanation in schematic diagram:

[0028] 1, box; 11, shell; 12, crossbeam; 13, partition; 14, sealing part; 15, sealing element; 16, protection platform; 2, integrated cover plate; 21, FPC board; 211, current collecting plate; 212, elastic element; 213, contact; 214, pole piece; 22, tray; 221, connecting plate; 222, baffle; 223, recess; 224, clamping groove. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more clearly understood, the specific embodiments of the utility model are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature is "on", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another 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 another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0035] Embodiment

[0036] The short-circuit prevention battery system of the present application is a battery with side-out explosion-proof valve, which comprises a plurality of battery groups arranged in a box 1. Figure 1 In the present application, the box 1 is a square structure with one side open, and a containing space is formed inside. The plurality of battery groups are arranged in the box 1. In the present application, the box 1 comprises an outer shell 11, which forms the four walls of the box 1. In the containing space of the box 1, a plurality of crossbeams 12 and a plurality of partitions 13 are arranged, the crossbeams 12 and the partitions 13 are arranged vertically and crosswise to divide the containing space into a plurality of regions, and the plurality of battery groups are arranged in the plurality of regions respectively to avoid mutual interference. In the present application, in order to reduce the volume, one crossbeam 12 and one partition 13 are arranged to divide the containing space in the box 1 into four regions.

[0037] In the present application, Figure 2 In the present application, the outer shell 11 and the open end face of the box 1 are a sealing part 14, a protection platform 16 is arranged inside the sealing part 14, and the protection platform 16 extends outwardly from the sealing part 14 to the opening direction of the box 1. A plurality of sealing elements 15 are arranged circumferentially on the sealing part 14, and when the open part of the box 1 is covered by a cover plate, the sealing elements 15 are compressed to seal the gap between the box 1 and the cover plate. In the present application, the height of the protection platform 16 extending out is greater than the height of the sealing element 15 after compression. Thus, the protection platform 16 can protect the sealing element 15 and the outer shell 11 when the electrolyte is sprayed out, block the electrolyte, and avoid corrosion of the sealing element 15 and the outer shell 11.

[0038] Combine Figure 3 and Figure 4 In this embodiment, an integrated cover plate 2 is provided at the pole end of the battery cell. In this embodiment, the integrated cover plate 2 includes an FPC board 21 and a tray 22. Specifically, the FPC board 21 includes a collector plate 211 and a contact 213, and the pole piece 214 is electrically connected to the collector plate 211 through the contact 213. The contact 213 is connected to the collector plate 211 through an elastic member 212. In this embodiment, the pole of the battery cell is in contact with and electrically connected to the pole piece 214, and the contact 213 is tightly attached to the pole piece 214 and is connected to the collector plate 211 through the elastic member 212 to conduct the current of the battery cell.

[0039] Combine Figure 5 and Figure 6 In this embodiment, the tray 22 includes a connecting plate 221 and a card slot 224, which are connected together. The pole piece 214 is fixedly arranged in the card slot 224, and the card slot 224 ensures that the pole piece 214 does not move. In this embodiment, a plurality of card slots 224 are arranged along the length direction of the connecting plate 221. A baffle 222 is also provided on one side of the connecting plate 221. The baffle 222 is the same length as the plurality of card slots 224. The baffle 222 and the plurality of card slots 224 together form a groove 223, and the groove 223 is filled with insulating glue. In this embodiment, the insulating glue is a heat-conductive insulating glue, which is connected to the liquid cooling plate of the battery pack, and the insulating glue is tightly fitted to the pole piece 214. The liquid cooling plate in this embodiment is arranged at the bottom of the battery cell in the battery cell group. In this embodiment, a baffle 222 is provided at the location of the electrode 214 connected to the battery cell. The baffle 222 forms a groove 223, and an insulating adhesive is injected into the groove 223. The insulating adhesive wraps the electrode 214. When the electrolyte is ejected, the insulating adhesive blocks the electrolyte from contacting the electrode 214. This prevents the electrode 214 from melting the tray due to arcing between the electrodes, or thermal runaway particles falling between the electrodes to cause a short circuit. At the same time, the thermally conductive insulating adhesive dissipates the heat of the electrode 214 through the liquid cooling plate, improving the heat dissipation efficiency of the battery pack.

[0040] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A short-circuit proof battery system for side-discharge explosion-proof valve batteries, characterized in that: The invention comprises a plurality of groups of battery cells, wherein the plurality of groups of battery cells are placed in a box (1); an integrated cover plate (2) is provided on the battery cells, the integrated cover plate (2) comprises a pole piece (214) and a tray (22); the pole piece (214) is connected to the battery cell pole ear, and the pole piece (214) is installed on the tray (22); a baffle (222) is provided on the tray (22) at the position of the pole piece (214), a groove (223) is provided between the baffle (222) and the pole piece (214), and the groove (223) is filled with insulating glue.

2. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 1, characterized in that: The insulating glue is a heat-conducting insulating glue, the insulating glue is connected to the battery pack liquid cooling plate, and the insulating glue is tightly fitted to the pole piece (214).

3. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 1, characterized in that: The box body (1) includes an outer shell (11), the end surface of the outer shell (11) located at the opening of the box body (1) is a sealing portion (14), a protective platform (16) is provided on the inner edge of the sealing portion (14), and the protective platform (16) extends outward from the sealing portion (14) toward the opening of the box body (1).

4. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 3, characterized in that: A sealing member (15) is provided on the sealing portion (14), and the height of the protective platform (16) extending outward is greater than the height of the sealing member (15) after being compressed.

5. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 1, characterized in that: The tray (22) further comprises a connecting plate (221), the connecting plate (221) is connected to the card slot (224), and the pole piece (214) is clamped in the card slot (224).

6. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 5, characterized in that: The baffle (222) is connected to the card slot (224), and the baffle (222) and the card slot (224) together form a groove (223).

7. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 1, characterized in that: The integrated cover plate (2) further comprises an FPC board (21), the FPC board (21) comprises a collector plate (211) and a contact (213), and the pole piece (214) is electrically connected to the collector plate (211) via the contact (213).

8. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 7, characterized in that: The contact (213) is connected to the collector plate (211) via an elastic member (212).

9. A short-circuit-proof battery system for batteries with side-discharge explosion-proof valves according to any one of claims 1 to 8, characterized in that: A storage space is formed in the box body (1), and a plurality of staggered crossbeams (12) and partitions (13) are arranged in the storage space. The crossbeams (12) and partitions (13) separate the plurality of battery cell groups in the storage space.

10. The short-circuit proof battery system for side-discharge explosion-proof valve batteries according to claim 2, characterized in that: The liquid cooling plate is arranged at the bottom of the battery cell in the battery cell group.

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