CN220821666U

CN220821666U - Battery bottom support plate, battery and battery pack

Info

Publication number: CN220821666U
Application number: CN202322391720.2U
Authority: CN
Inventors: 沈良军
Original assignee: Honeycomb Energy Technology Nanjing Co ltd
Current assignee: Honeycomb Energy Technology Nanjing Co ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-19
Anticipated expiration: 2033-09-04

Abstract

The utility model relates to the technical field of batteries and discloses a battery bottom support plate, a battery and a battery pack. The second layer board includes the first bearing section of being connected with first layer board and the second bearing section of being connected with first bearing section, and the internal surface protrusion of first bearing section forms first step structure in the internal surface of second bearing section, and first layer board and second layer board constitute L type structure, are suitable for with two side butt of utmost point group, first step structure is suitable for with the spacing cooperation of second step structure that constitutes by utmost point group and utmost point ear. The utility model can realize the limit of the electrode group along the height direction and the length direction of the battery core, can play an effective role in fixing the electrode group, prevent the electrode group from moving in two directions, ensure the stability of the electrode group in the shell and improve the safety and the running performance of the battery; can separate utmost point ear and casing, avoid the short circuit, prevent to receive the extrusion of casing fillet, play the guard action to the utmost point group.

Description

Battery bottom support plate, battery and battery pack

Technical Field

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

Background

With the increasing maturity of lithium ion battery technology, the lithium ion battery is widely applied to the electric automobile and the energy storage field as a power battery, and the requirements on the usability and the safety of the lithium ion battery are increasing.

The lithium battery bottom support plate is an accessory in the lithium ion battery and is used for supporting the pole group, and the hollow aluminum shell and the pole group form extrusion.

The traditional bottom support plate is rectangular, the bare cell insulating piece and the bottom support plate are wrapped by the pole group after being hot-melted, and the bottom support plate is limited to the pole group only in the height direction along the cell, so that the pole group easily shakes along the length direction in the cell shell, and the safety and the performance of the cell are affected.

Disclosure of utility model

In view of the above, the present utility model provides a battery bottom plate, a battery and a battery pack, so as to solve the problems of unstable pole group in the battery case, easy occurrence of play, and influence on the safety and performance of the battery.

In a first aspect, the present utility model provides a battery bottom pallet comprising a first pallet and a second pallet. The second layer board includes the first bearing section of being connected with first layer board and the second bearing section of being connected with first bearing section, and the internal surface protrusion of first bearing section forms first step structure in the internal surface of second bearing section, and first layer board and second layer board constitute L type structure, are suitable for with two side butt of utmost point group, first step structure is suitable for with the spacing cooperation of second step structure that constitutes by utmost point group and utmost point ear.

The beneficial effects are that: through setting up first layer board and second layer board, both form L type structure, can be with two side phase-matches of same L type of utmost point group, owing to there is the second step structure between utmost point group and the utmost point ear, set up two sections with the second layer board, and form first step structure between first bearing section and the second bearing section, first step structure can cooperate with the second step structure, can realize carrying out spacing along electric core direction of height and length direction to the utmost point group, thereby, can play effectual fixed action to the utmost point group, prevent that the utmost point group from taking place the drunkenness in two directions, guarantee the stability of utmost point group in the casing, improve the security and the running performance of battery. Meanwhile, the battery bottom support plate can separate the electrode lug from the shell, so that short circuit is avoided; finally, the battery bottom support plate is L-shaped, so that corners of the pole group can be wrapped, extrusion of the round corners of the shell is prevented, and the pole group is protected.

In an alternative embodiment, the outer side of at least one of the first pallet and the first support section is provided with a plurality of support webs, and an exhaust passage is formed between adjacent support webs.

The beneficial effects are that: the arrangement is that an exhaust channel exists between the battery bottom support plate and the shell, and gas in the battery core can flow into the exhaust channel from a gap between the electrode group and the battery bottom support plate, so that the flowing exhaust of the gas in the battery core is facilitated, and the safety performance of the battery is further improved. In addition, the supporting rib plate is directly abutted with the shell, so that the second supporting plate does not need to be made into a thicker solid plate, and weight and cost reduction of the battery are facilitated.

In an alternative embodiment, a plurality of support webs are spaced apart side-by-side.

The beneficial effects are that: the arrangement can lead the formed exhaust channel to be regular and orderly, on one hand, the gas flows along the exhaust channel, plays a role in guiding the gas, improves the gas exhaust speed, further improves the safety performance of the battery, on the other hand, is convenient to process and reduces the manufacturing cost.

In an alternative embodiment, the first supporting plate and the first bearing section are respectively provided with a supporting rib plate, and the first supporting plate is correspondingly communicated with the exhaust channel on the first bearing section.

The beneficial effects are that: the arrangement ensures that the gas flows in the exhaust channel, the flow path of the gas is simple, the path change is less, the exhaust speed of the gas is convenient to be improved, and the safety performance of the battery is further improved.

In an alternative embodiment, at least one of the first and second trays is provided with a plurality of vent holes.

The beneficial effects are that: the arrangement is that the gas in the battery cell can directly enter the exhaust channel through the exhaust hole, so that the flow path of the gas is greatly shortened, the gas in the battery cell can be rapidly exhausted, and the safety performance of the battery is further improved.

In an alternative embodiment, the vent holes are provided between adjacent support webs.

The beneficial effects are that: the arrangement is that most of gas passes through the exhaust hole and then directly reaches the exhaust channel, so that the exhaust effect is better and the speed is higher.

In an alternative embodiment, the outer end face of the support web is flush with the outer surface of the second support section.

The beneficial effects are that: the outer surface of the support rib plate and the outer surface of the second bearing section are simultaneously abutted with the inner surface of the shell, so that the pole group is ensured to be stable and not to shake in the shell.

In a second aspect, the utility model also provides a battery, which comprises a shell, a pole group and a battery bottom support plate in any one of the above technical schemes. The electrode group is arranged in the shell, two ends of the electrode group are provided with electrode lugs, the outer surfaces of the electrode lugs protrude out of the outer surfaces of the electrode group, and a second step structure is formed between the electrode lugs and the electrode group; the battery bottom support plate is arranged in the shell, the first support section of the second support plate is abutted with the pole group, the second support section is abutted with the pole group, and the first step structure is matched with the second step structure.

The beneficial effects are that: because the battery includes the battery bottom plate, the same effects as those of the battery bottom plate are achieved, and the detailed description thereof is omitted.

In an alternative embodiment, the housing is provided with an explosion protection valve, and the exhaust channels on the first support plate and the first support section extend in a direction towards the explosion protection valve.

The beneficial effects are that: the exhaust channel plays a guiding role in the circulation process of gas, when a large amount of gas is generated in the battery cell, the gas flows along the exhaust channel, and the flowing direction of the gas is towards the explosion-proof valve, so that most of gas can be drained to the explosion-proof valve, the battery can be conveniently and rapidly exploded and decompressed when a large amount of gas is generated, and the safety performance of the battery is improved.

In a third aspect, the present utility model also provides a battery pack, including the battery bottom plate of any one of the above technical solutions; or, the battery of any one of the above technical solutions.

The beneficial effects are that: because the battery pack includes the battery bottom plate or the battery described above, the same effects as those of the battery bottom plate are obtained, and the description thereof will be omitted.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front view of a battery chassis plate according to an embodiment of the present utility model;

FIG. 2 is a right side view of the battery tray shown in FIG. 1;

FIG. 3 is a top view of the battery tray shown in FIG. 1;

fig. 4 is a perspective view of the battery tray shown in fig. 1 from a direction a;

fig. 5 is a perspective view of the battery bottom bracket shown in fig. 1 from a view in the B direction;

Fig. 6 is a front view showing the structural decomposition of the battery according to the embodiment of the present utility model;

fig. 7 is a perspective view of the battery shown in fig. 6.

Reference numerals illustrate:

1. A first pallet; 2. a second pallet; 201. a first support section; 202. a second support section; 203. a first step structure; 204. a support rib plate; 205. an exhaust passage; 206. an exhaust hole; 3. a housing; 4. a pole group; 5. a tab; 6. a second step structure; 7. an explosion-proof valve; 8. a pole; 10. a battery bottom plate; 20. and a battery.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiments of the present utility model are described below with reference to fig. 1 to 7.

According to an embodiment of the present utility model, in a first aspect, there is provided a battery bottom pallet 10 comprising a first pallet 1 and a second pallet 2. The second support plate 2 comprises a first support section 201 connected with the first support plate 1 and a second support section 202 connected with the first support section 201, the inner surface of the first support section 201 protrudes out of the inner surface of the second support section 202 to form a first step structure 203, the first support plate 1 and the second support plate 2 form an L-shaped structure, the first support plate 1 and the second support plate 2 are suitable for being abutted against two side surfaces of the pole group 4, and the first step structure 203 is suitable for being in limit fit with a second step structure 6 formed by the pole group 4 and the pole lug 5.

Through setting up first layer board 1 and second layer board 2, both form L type structure, can be with the same two side phase-matches that are the L type of utmost point group 4, owing to there is second step structure 6 between utmost point group 4 and the utmost point ear 5, set up second layer board 2 into two sections, and form first step structure 203 between first bearing section 201 and the second bearing section 202, first step structure 203 can cooperate with second step structure 6, can realize spacing along electric core direction of height to utmost point group 4, can realize spacing along the length direction of electric core to utmost point group 4 again, thereby can play effectual fixed action to utmost point group 4, prevent that utmost point group 4 from taking place the drunkenness in two directions, guarantee the stability of utmost point group 4 in casing 3, improve battery 20's security and running property. Meanwhile, the battery bottom support plate 10 can separate the electrode lug 5 from the shell 3, so that short circuit is avoided; finally, in most of the batteries 20 at present, the corners of the housing 3 are rounded, but the corners of the pole groups 4 are right angles, and the corners are not rounded, so that the clearance between the rounded corners of the inner cavity of the housing 3 and the pole groups 4 is smaller than the clearance between the side walls of the housing 3 and the side walls of the pole groups 4, and therefore, the rounded corners of the housing 3 squeeze the pole groups 4. The battery bottom support plate 10 provided in this embodiment forms an L shape between the first support plate 1 and the second support plate 2, and can wrap the corners of the pole group 4, prevent from being extruded by the rounded corners of the housing 3, and protect the pole group 4.

In one embodiment, the outer surface of the junction of the first pallet 1 and the second pallet 2 is rounded, the inner surfaces of the first pallet 1 and the second pallet 2 form a right angle, the rounded corner formed between the first pallet 1 and the second pallet 2 is a first rounded corner, the rounded corner of the battery 20 housing 3 is a second rounded corner, and the first rounded corner and the second rounded corner are adapted.

The setting like this, owing to the fillet laminating of the surface of first layer board 1 and the junction of second layer board 2 and casing 3, the right angle laminating of the internal surface of first layer board 1 and the junction of second layer board 2 and utmost point group 4, on the one hand, between battery bottom support board 10 and the casing 3, the area of contact between battery bottom support board 10 and the utmost point group 4 is bigger, supports and spacing effect better, on the other hand, can effectively improve the inside space utilization of casing 3.

Specifically, the inner surfaces of the first and second pallets 1 and 2 refer to one side surface facing the pole group 4 when assembled into the case 3 of the battery 20. Accordingly, the outer surfaces of the first and second pallets 1 and 2 refer to a side surface facing the case 3 when assembled into the case 3 of the battery 20.

At present, a conventional bottom support plate is a solid plate, most of the bottom support plate is made of PP (polypropylene) materials, the bottom support plate is connected with a bare cell insulating sheet in a hot melting mode, the bottom support plate is abutted to a shell 3 of a battery 20, a gap between the bottom support plate and the shell 3 is small, and the discharge of gas generated by a pole group 4 is not facilitated, so that the safety is poor.

Further, to solve the above-mentioned technical problem, in one embodiment, a plurality of support rib plates 204 are disposed on an outer side surface of at least one of the first supporting plate 1 and the first supporting section 201, and an exhaust channel 205 is formed between adjacent support rib plates 204.

By the arrangement, the supporting rib plates 204 can play a role in supporting and fixing the pole group 4 between the pole group 4 and the shell 3, meanwhile, the exhaust channel 205 is formed between the battery bottom support plate 10 and the shell 3, gas in the battery cell can flow into the exhaust channel 205 from a gap between the pole group 4 and the battery bottom support plate 10, flowing exhaust of the gas in the battery cell is facilitated, and safety performance of the battery 20 is further improved. In addition, the supporting rib plates 204 are directly abutted with the shell 3, so that the second supporting plate 2 does not need to be made into a thicker solid plate, and weight and cost reduction of the battery 20 are facilitated.

In one embodiment, a plurality of support webs 204 are spaced apart side-by-side.

By the arrangement, the formed exhaust channels 205 can be regular and orderly, on one hand, gas flows along the exhaust channels 205, so that the gas is guided, the gas exhaust speed is improved, the safety performance of the battery 20 is further improved, on the other hand, the processing is convenient, and the manufacturing cost is reduced.

In one embodiment, the first supporting plate 1 and the first supporting section 201 are respectively provided with a supporting rib plate 204, and the first supporting plate 1 is correspondingly communicated with the exhaust channel 205 on the first supporting section 201.

In this way, the gas flows in the exhaust passage 205, the flow path of the gas is simple, the path change is small, the exhaust speed of the gas is convenient to be improved, and the safety performance of the battery 20 is further improved.

In one embodiment, at least one of the first pallet 1 and the second pallet 2 is provided with a plurality of vent holes 206.

By the arrangement, the gas in the battery cell can directly enter the exhaust channel 205 through the exhaust hole 206, so that the flow path of the gas is greatly shortened, the gas in the battery cell can be rapidly exhausted, and the safety performance of the battery 20 is further improved.

In one embodiment, the vent holes 206 are provided between adjacent support webs 204.

By this arrangement, most of the gas passes through the exhaust hole 206 and then reaches the exhaust channel 205, so that the exhaust effect is better and the speed is faster.

In one embodiment, the outer end surface of the brace web 204 is flush with the outer surface of the second brace section 202.

The outer surface of the support rib plate 204 and the outer surface of the second bearing section 202 are simultaneously abutted against the inner surface of the shell 3, so that the pole group 4 is ensured to be stable and not to shake in the shell 3.

According to an embodiment of the present utility model, in a second aspect, there is provided a battery 20 including a case 3, a pole group 4, and a battery bottom plate 10 of any one of the above technical solutions. The pole group 4 is arranged in the shell 3, two ends of the pole group 4 are provided with pole lugs 5, the outer surfaces of the pole lugs 5 protrude out of the outer surfaces of the pole group 4, and a second step structure 6 is formed between the pole lugs 5 and the pole group 4; the battery bottom support plate 10 is arranged in the shell 3, the first support section 201 of the second support plate 2 is abutted with the pole group 4, the second support section 202 is abutted with the pole group 4, and the first step structure 203 is matched with the second step structure 6. Specifically, since two tabs 5 are provided, and two tabs 5 are respectively provided at two ends of the pole group 4, two bottom plates are provided, and the two bottom plates are disposed opposite to each other and are respectively matched with the tabs 5 and the pole groups 4 at two sides.

Specifically, the pole group 4 includes a first side and a second side that are adjacent to each other, and the tab 5 is disposed on the second side. The first pallet 1 of the battery bottom pallet 10 is matched with the first side, the second pallet 2 is matched with the second side, and the first step structure 203 of the second pallet 2 is in limit fit with the second step structure 6 of the second side. Specifically, the first supporting section 201 of the second supporting plate 2 is abutted to the inner surface of the first supporting section 201 and the electrode group 4, the inner surface of the second supporting section 202 is abutted to the protruding electrode lug 5, the step surface between the first supporting section 201 and the second supporting section 202 is a first step surface, the step surface between the electrode group 4 and the electrode lug 5 is a second step surface, and the first step surface is abutted to the second step surface. The outer end surface of the support rib plate 204 is flush with the outer surface of the second bearing section 202 and is jointly abutted against the inner surface of the shell 3. Further, the tab 5 is connected to the post 8.

Since the battery includes the battery bottom plate 10 described above, the same effects as those of the battery bottom plate 10 are obtained, and thus, a detailed description thereof will be omitted.

In one embodiment, the housing 3 is provided with an explosion protection valve 7, and the first support plate 1 and the exhaust channel 205 in the first support section 201 extend in a direction towards the explosion protection valve 7.

The exhaust passage 205 plays a guiding role in the circulation process of gas, when a large amount of gas is generated in the battery cell, the gas flows along the exhaust passage 205, and the flowing direction of the gas is towards the explosion-proof valve 7, so that most of gas can be drained to the explosion-proof valve 7, the battery 20 can be conveniently and rapidly exploded and decompressed when a large amount of gas is generated, and the safety performance of the battery 20 is improved.

According to an embodiment of the present utility model, in a third aspect, there is provided a battery pack including the battery bottom plate 10 of any one of the above technical aspects; or, the battery 20 of any one of the above technical aspects.

Since the battery pack includes the battery bottom plate 10 or the battery 20 described above, the same effects as those of the battery bottom plate 10 are obtained, and thus, a detailed description thereof will be omitted.

The utility model has the following advantages:

1. The first step structure 203 of the bottom support plate is matched with the second step structure 6 of the pole group 4, so that the pole group 4 is supported and is not easy to shake in two directions on the side surface of the protection pole group 4; the electrode group 4 is prevented from being extruded by the round corners of the shell 3, and the electrode group 4 is protected; the raised lugs 5 are separated from the shell 3, so that short circuit is avoided;

2. The bottom support plate is provided with an exhaust channel 205 and an exhaust hole 206, so that the gas generated in the electrode group 4 can be conveniently and rapidly exhausted, and the safety performance of the battery cell is improved.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims

1. A battery tray, comprising:

A first pallet (1);

The second layer board (2), second layer board (2) include with first bearing section (201) that first layer board (1) is connected and with second bearing section (202) that first bearing section (201) is connected, the internal surface protrusion of first bearing section (201) in the internal surface of second bearing section (202) forms first step structure (203), first layer board (1) with second layer board (2) constitute L type structure, be suitable for with two side butt of utmost point group (4), first step structure (203) are suitable for with the spacing cooperation of second step structure (6) that constitute by utmost point group (4) and utmost point ear (5).

2. The battery bottom plate according to claim 1, characterized in that the outer side surface of at least one of the first plate (1) and the first support section (201) is provided with a plurality of support rib plates (204), and an exhaust channel (205) is formed between adjacent support rib plates (204).

3. The battery tray according to claim 2, wherein a plurality of the support ribs (204) are arranged in parallel at intervals.

4. A battery bottom bracket according to claim 2 or 3, wherein the first bracket (1) and the first supporting section (201) are provided with supporting rib plates (204), and the first bracket (1) and the exhaust channel (205) on the first supporting section (201) are correspondingly communicated.

5. A battery bottom pallet according to claim 2 or 3, characterized in that at least one of the first pallet (1) and the second pallet (2) is provided with a number of exhaust holes (206).

6. The battery tray of claim 5, wherein the vent holes (206) are disposed between adjacent ones of the support webs (204).

7. A battery chassis according to claim 2 or 3, characterized in that the outer end face of the support web (204) is flush with the outer surface of the second support section (202).

8. A battery, comprising:

A housing (3);

The pole group (4) is arranged in the shell (3), two ends of the pole group (4) are provided with pole lugs (5), the outer surfaces of the pole lugs (5) protrude out of the outer surfaces of the pole group (4), and a second step structure (6) is formed between the pole lugs (5) and the pole group (4);

The battery bottom support plate of any one of claims 1 to 7, being arranged in the housing (3), the first support section (201) of the second support plate (2) being in abutment with the pole group (4), the second support section (202) being in abutment with the pole group (4), the first step structure (203) being in cooperation with the second step structure (6).

9. The battery according to claim 8, characterized in that the housing (3) is provided with an explosion-proof valve (7), and the exhaust channels (205) in the first support plate (1) and in the first support section (201) extend in a direction towards the explosion-proof valve (7).

10. A battery pack, comprising:

The battery chassis of any one of claims 1 to 7;

or, the battery according to claim 8 or 9.