Cell isolation sleeve and battery module

Abstract

The present invention relates to the technical field of power batteries, and in particular to a cell isolation sleeve and a battery module. A first vertical bar hole and a second vertical bar hole are respectively provided on the left connecting edge and the right connecting edge of the cell isolation sleeve, and water droplets on the side of the cell spread to the left connecting edge and the right connecting edge, and the water droplets will gather in the first vertical bar hole and the second vertical bar hole, thereby blocking the water droplets from continuing to spread, and due to the effect of gravity, the water droplets will fall when they gather to a certain size, thereby solving the problem that the water droplets on the side of the cell may flow into the battery module through the cell isolation sleeve, causing leakage, short circuit, fire and explosion of the battery module and other dangerous phenomena.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery cell isolation sleeve and a battery module. Background Art

[0002] When the battery module is in a low-temperature environment, the moisture in the air will condense on the sides of the battery cells. According to the capillary phenomenon, the condensed water will slowly spread upwards along the sides of the battery cells, and the water droplets will accumulate and grow larger. The water droplets may flow into the battery module through the battery cell isolation sleeve, causing dangerous phenomena such as leakage, short circuit, fire and explosion in the battery module. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention proposes a battery cell isolation sleeve and a battery module, which aim to solve the problem that water droplets on the side of the battery cell may flow into the battery module through the battery cell isolation sleeve, causing dangerous phenomena such as leakage, short circuit, fire and explosion in the battery module.

[0004] The technical solution proposed by the present invention is:

[0005] A battery cell isolation sleeve is used to be arranged between two battery cells. The battery cell isolation sleeve has a left connecting edge and a right connecting edge. The left connecting edge is provided with a first vertical bar hole, and the right connecting edge is provided with a second vertical bar hole.

[0006] Furthermore, the battery cell isolation sleeve has a lower connecting edge, the left end of the lower connecting edge is connected to the lower end of the left connecting edge, the right end of the lower connecting edge is connected to the lower end of the right connecting edge, a left angle is formed at the connection between the left end of the lower connecting edge and the lower end of the left connecting edge, and a right angle is formed at the connection between the right end of the lower connecting edge and the lower end of the right connecting edge, the left angle is provided with a first through hole, and the right angle is provided with a second through hole.

[0007] Furthermore, the lower connecting edge is provided with a third through hole.

[0008] Furthermore, the battery cell isolation sleeve has an upper connecting edge, the left end of the upper connecting edge is connected to the upper end of the left connecting edge, the right end of the lower connecting edge is connected to the upper end of the right connecting edge, and the lower side wall of the upper connecting edge is provided with an upper partition, and the upper partition divides the space in the battery cell isolation sleeve into a battery cell installation space and a battery cell stacking space.

[0009] Further, the first vertical bar holes are respectively communicated with the battery cell installation space and the battery cell stacking space, and the second vertical bar holes are respectively communicated with the battery cell installation space and the battery cell stacking space.

[0010] Furthermore, a lower partition is provided on the upper side wall of the lower connecting edge, and the lower partition corresponds to the upper partition in the upper and lower directions.

[0011] Furthermore, sealing strips are provided on both inner and outer side walls of the upper partition.

[0012] Furthermore, the left corner is provided with a first protrusion, and the first protrusion is located in the first through hole. The right corner is provided with a second protrusion, and the second protrusion is located in the second through hole.

[0013] The present invention further provides a battery module, comprising at least two battery cells, wherein a battery cell isolation sleeve as described above is provided between every two battery cells.

[0014] Furthermore, the battery module also includes an upper cover, which is arranged on the at least two battery cells. The lower side wall of the upper cover is provided with two rows of reinforcing ribs arranged in parallel on the left and right sides, each row of reinforcing ribs includes a plurality of reinforcing ribs, and foam is provided between every two reinforcing ribs.

[0015] According to the above technical scheme, the beneficial effects of the present invention are as follows: the left connecting edge and the right connecting edge of the battery cell isolation sleeve are respectively provided with a first vertical bar hole and a second vertical bar hole, and the water droplets on the side of the battery cell spread to the left connecting edge and the right connecting edge, and the water droplets will gather in the first vertical bar hole and the second vertical bar hole, thereby blocking the water droplets from continuing to spread, and due to the effect of gravity, the water droplets will fall when they gather to a certain size, thereby solving the problem that the water droplets on the side of the battery cell may flow into the battery module through the battery cell isolation sleeve, causing dangerous phenomena such as leakage, short circuit, fire and explosion in the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a battery cell isolation sleeve provided by an embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of a battery cell isolation sleeve provided by another embodiment of the present invention;

[0018] Figure 3 is a schematic structural diagram of a battery cell isolation sleeve provided by another embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of a battery module provided by an embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the upper cover provided by the embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] like Figure 1As shown, an embodiment of the present invention provides a battery cell isolation sleeve, which is used to be arranged between two battery cells. The battery cell isolation sleeve has a left connecting edge 1 and a right connecting edge 2. The left connecting edge 1 is provided with a first vertical bar hole 11, and the right connecting edge 2 is provided with a second vertical bar hole 21.

[0023] A first vertical bar hole 11 and a second vertical bar hole 21 are respectively provided on the left connecting edge 1 and the right connecting edge 2 of the battery cell isolation sleeve. Water droplets on the side of the battery cell spread to the left connecting edge 1 and the right connecting edge 2, and the water droplets gather in the first vertical bar hole 11 and the second vertical bar hole 21, thereby blocking the water droplets from continuing to spread. Due to the effect of gravity, the water droplets will fall when they gather to a certain size, thereby solving the problem that the water droplets on the side of the battery cell may flow into the battery module through the battery cell isolation sleeve, causing dangerous phenomena such as leakage, short circuit, fire and explosion in the battery module.

[0024] In some embodiments, there are multiple first vertical holes 11 and multiple second vertical holes 21, that is, the left connecting edge 1 is provided with multiple first vertical holes 11, and the right connecting edge 2 is provided with multiple second vertical holes 21. This increases the probability that water droplets will gather in the first vertical holes 11 and the second vertical holes 21, thereby increasing the safety factor of the battery module.

[0025] In this embodiment, the left side wall of the left connecting edge 1 and the right side wall of the right connecting edge 2 are both used to connect with the side panels, and glue is provided on the left side wall of the left connecting edge 1 and the right side wall of the right connecting edge 2, and the left side wall of the left connecting edge 1 and the right side wall of the right connecting edge 2 are respectively adhered to the side panels by glue.

[0026] In this embodiment, the cell isolation sleeve has a lower connecting edge 3, the left end of the lower connecting edge 3 is connected to the lower end of the left connecting edge 1, the right end of the lower connecting edge 3 is connected to the lower end of the right connecting edge 2, a left corner 4 is formed at the connection between the left end of the lower connecting edge 3 and the lower end of the left connecting edge 1, and a right corner 5 is formed at the connection between the right end of the lower connecting edge 3 and the lower end of the right connecting edge 2, the left corner 4 is provided with a first through hole 41, and the right corner 5 is provided with a second through hole 51. The glue on the left side wall of the left connecting edge 1 and the right side wall of the right connecting edge 2 flows downward to the left corner 4 and the right corner 5 respectively, so that the glue enters the first through hole 41 and the second through hole 51, so that the cell is bonded to the left corner 4 and the right corner 5, and a sealing structure is formed at the left corner 4 and the right corner 5, which has the following effects: 1. Blocking the path for water droplets to spread. 2. During the subsequent operation of the battery module, the blue film at the bottom corner of the battery cell should be prevented from rubbing against the battery cell isolation sleeve, thereby reducing the possibility of the blue film at the bottom corner of the battery cell being broken. 3. When the battery cell is broken at the bottom corner, leakage can be prevented.

[0027] In this embodiment, the lower connecting edge 3 is provided with a third through hole 31. The third through hole 31 can discharge the water droplets at the bottom of the battery cell. The third through hole 31 blocks the spread of condensed water droplets at the bottom of the battery cell. When the condensed water droplets gather at the third through hole 31 at the bottom of the battery cell isolation sleeve, the condensed water droplets will fall into the third through hole 31 and be discharged from the battery module.

[0028] In this embodiment, the cell isolation sleeve has an upper connecting edge 6, the left end of the upper connecting edge 6 is connected to the upper end of the left connecting edge 1, the right end of the lower connecting edge 3 is connected to the upper end of the right connecting edge 2, and the lower side wall of the upper connecting edge 6 is provided with an upper partition 61, which divides the middle space of the cell isolation sleeve into a cell installation space and a cell stacking space. The cell installation space is used to install one cell, and the cell stacking space is used to abut against another cell when stacking.

[0029] In this embodiment, the first vertical bar holes 11 are respectively connected to the battery cell installation space and the battery cell stacking space, and the second vertical bar holes 21 are respectively connected to the battery cell installation space and the battery cell stacking space. The first vertical bar holes 11 are connected to both the battery cell installation space and the battery cell stacking space, and the second vertical bar holes 21 are connected to both the battery cell installation space and the battery cell stacking space. The battery cells installed in the battery cell installation space and the battery cells stacked in the battery cell stacking space can gather water droplets through the first vertical bar holes 11 and / or the second vertical bar holes 21.

[0030] In this embodiment, a lower partition is provided on the upper side wall of the lower connecting edge 3, and the lower partition corresponds to the upper partition 61 in the upper and lower directions to further separate the battery cell installation space and the battery cell stacking space.

[0031] In this embodiment, the inner and outer side walls of the upper partition 61 are both provided with sealing strips 7. Double-sided tape or glue is provided on the inner and outer side walls of the upper partition 61, and the sealing strips 7 are attached to the inner and outer side walls of the upper partition 61 through the double-sided tape or glue. The sealing strip 7 divides the battery installed in the battery isolation sleeve into a conductive area and an insulating area with the sealing strip 7 as the boundary. The distance between the sealing strip 7 and the upper connecting edge 6 is 0.5 mm to 15 mm.

[0032] The thickness of the sealing strip 7 is 0.5mm to 5mm, and double-sided tape is attached to the back of the sealing strip 7. The double-sided adhesiveness is used to fix it on the battery cell isolation sleeve. Then, the compressibility of the sealing strip 7 is used. The sealing strip 7 on the front of the battery cell isolation sleeve uses the pressure when the battery cell and the battery cell isolation sleeve are fixed, so that the sealing strip 7 on the front of the battery cell isolation sleeve is compressed and close to the battery cell for sealing; the sealing strip 7 on the back of the battery cell isolation sleeve uses the pressure when the battery cell and the battery cell isolation sleeve are stacked, so that the sealing strip 7 is compressed and close to the battery cell for sealing; in this way, a conductive area and an insulating area can be formed with the sealing strip 7 as the boundary, and the stacked battery modules are divided into a conductive area and an insulating area. The area above the sealing strip 7 is the conductive area, and the area below the sealing strip 7 is the insulating area.

[0033] In this embodiment, the sealing strip 7 is formed of an insulating compressible material, which may be a rubber strip or foam.

[0034] In some embodiments, both the inner and outer side walls of the upper partition 61 are provided with grooves, and a sealing strip 7 is provided in the groove. The sealing strip 7 is pasted in the groove, and the groove has a certain fixing effect on the sealing strip 7.

[0035] like Figure 2 As shown, in some embodiments, notches 9 are provided on both the left connecting edge 1 and the right connecting edge 2 , and the notches 9 are used to position and fix the sealing strip 7 .

[0036] like Figure 3 As shown, in some embodiments, both inner and outer side walls of the upper partition 61 are provided with sealing strips 7, and both ends of the sealing strip 7 are provided with folding blocks 71. One folding block is connected to the right side wall of the left connecting edge 1, and the other folding block 71 is connected to the left side wall of the right connecting edge 2, and the connection method can be through double-sided tape or glue.

[0037] like Figure 3 As shown, in some embodiments, the inner and outer side walls of the upper partition 61 are both provided with sealing strips 7 , the inner and outer side walls of the upper partition 61 are both provided with positioning holes 611 , and one side wall of the sealing strip 7 is provided with a protrusion that matches the positioning hole 611 .

[0038] In some embodiments, the sealing strip 7 is integrally formed with the battery cell isolation sleeve.

[0039] In some embodiments, the sealing strip 7 is in the shape of a long ring, and the sealing strip 7 is sleeved on the battery cell isolation sleeve by elastic deformation, and the sealing strip 7 is located on the upper partition 61 .

[0040] In this embodiment, the left corner 4 is provided with a first protrusion, which is located in the first through hole 41, and the right corner 5 is provided with a second protrusion 52, which is located in the second through hole 51. The first protrusion and the second protrusion 52 have the function of blocking glue, so that the glue stays in the first through hole 41 and the second through hole 51.

[0041] The present invention further provides a battery module, comprising at least two battery cells, wherein a battery cell isolation sleeve as described above is provided between every two battery cells.

[0042] like Figure 4 and Figure 5 As shown, in this embodiment, the battery module further includes an upper cover 8, which is disposed on at least two battery cells, and the lower side wall of the upper cover 8 is provided with two rows of reinforcing ribs arranged in parallel on the left and right sides, each row of reinforcing ribs includes a plurality of reinforcing ribs 81, and a foam 82 is provided between every two reinforcing ribs 81. The foam 82 can prevent the occurrence of capillary phenomena, and spread the condensed water droplets through the upper cover 8 to the side panels, end panels and other metal parts.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell isolation sleeve, characterized in that: The battery cell isolation sleeve is used to be arranged between two battery cells, and the battery cell isolation sleeve has a left connecting edge and a right connecting edge, the left connecting edge is provided with a first vertical bar hole, and the right connecting edge is provided with a second vertical bar hole; The cell isolation sleeve has a lower connecting edge, the left end of the lower connecting edge is connected to the lower end of the left connecting edge, the right end of the lower connecting edge is connected to the lower end of the right connecting edge, a left wrap angle is formed at the connection between the left end of the lower connecting edge and the lower end of the left connecting edge, and a right wrap angle is formed at the connection between the right end of the lower connecting edge and the lower end of the right connecting edge, the left wrap angle is provided with a first through hole, and the right wrap angle is provided with a second through hole; The battery cell isolation sleeve has an upper connecting edge, the left end of the upper connecting edge is connected to the upper end of the left connecting edge, the right end of the upper connecting edge is connected to the upper end of the right connecting edge, and the lower side wall of the upper connecting edge is provided with an upper partition, and the upper partition divides the space in the battery cell isolation sleeve into a battery cell installation space and a battery cell stacking space; The inner and outer side walls of the upper partition are both provided with sealing strips; the inner and outer side walls of the upper partition are both provided with double-sided tape or glue, and the inner and outer side walls of the upper partition are adhered with the sealing strips through the double-sided tape or glue, and the sealing strips divide the battery cell installed in the battery cell isolation sleeve into a conductive area and an insulating area with the sealing strips as the boundary.

2. The battery core isolation sleeve according to claim 1, characterized in that: The lower connecting edge is provided with a third through hole.

3. The battery core isolation sleeve according to claim 1, characterized in that: The first vertical bar holes are respectively communicated with the battery cell installation space and the battery cell stacking space, and the second vertical bar holes are respectively communicated with the battery cell installation space and the battery cell stacking space.

4. The battery core isolation sleeve according to claim 1, characterized in that: A lower partition is disposed on the upper side wall of the lower connecting edge, and the lower partition corresponds to the upper partition up and down.

5. The battery cell isolation sleeve according to claim 1, characterized in that: The left corner is provided with a first protrusion, and the first protrusion is located in the first through hole. The right corner is provided with a second protrusion, and the second protrusion is located in the second through hole.

6. A battery module, characterized in that: The invention comprises at least two battery cells, wherein a battery cell isolation sleeve as claimed in any one of claims 1 to 5 is arranged between every two battery cells.

7. The battery module according to claim 6, characterized in that: The battery module also includes an upper cover, which is arranged on the at least two battery cells. The lower side wall of the upper cover is provided with two rows of reinforcing ribs arranged in parallel on the left and right sides. Each row of reinforcing ribs includes a plurality of reinforcing ribs, and foam is provided between every two reinforcing ribs.

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