Battery with reduced length size

Abstract

The utility model provides a battery with a reduced length size. The battery comprises a battery cell and a shell covering the battery cell, the battery core comprises two core packages which are arranged side by side in the width direction, the length of each core package is smaller than the width of the core package, each core package is provided with a positive tab and a negative tab in the length direction, the positive tabs and the negative tabs are located at the two ends of the core packages respectively and extend out of the core packages, and each core package is provided with a positioning end face. The positioning end face is located in the width direction of the core package, the positive tab and the negative tab are symmetrically arranged relative to the core package, and the positive tab is close to the positioning end face; the positioning end surfaces of the two core packages are attached to each other, and the shell covers the battery core. According to the utility model, the length size of the core cladding is reduced, the core cladding is arranged in the width direction, the distance between the positive and negative tabs is reduced, the current density distribution is more uniform, the two half shells share the positive and negative electrode cover plates, and compared with a conventional long-size battery, the cost is more advantageous.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a battery of reducing length size. BACKGROUND

[0002] With the development of lithium battery technology, energy storage system pursues higher energy density, and the PACK designed by CTB or CTP tends to use long-size high-space battery cells to improve space utilization, but usually the positive and negative pole pieces of such long-size single battery cells are arranged at the two ends of the length direction of the battery cell, and with the increase of the length size of the battery cell, the distance between the two pole pieces is long, the internal resistance of the battery increases, the current density distribution is uneven, and then the battery heating increases, the battery power decreases, and the battery life is reduced. SUMMARY

[0003] The utility model discloses a battery of reducing length size.

[0004] The utility model discloses a battery of reducing length size, including the battery cell and the shell of covering in the battery cell outside, the battery cell includes two core packages that are arranged side by side in width direction, the length of core package is less than its width, the core package is provided with positive ear and negative ear along length direction, the positive ear and negative ear are located two ends of core package respectively, and all extend to the outside of core package, the core package has the positioning end face, the positioning end face is located in the width direction of core package, the positive ear and negative ear are symmetrically arranged about core package, and the positive ear is close to the positioning end face, the positioning end face of two core packages is pasted, and the shell covers in the battery cell outside.

[0005] The utility model discloses preferably technical scheme: the shell includes two half shells, the half shell has an opening, the opening is located in the width direction of core package, and the openings of two half shells are opposite, and two half shells are respectively covered outside core package through the opening.

[0006] The utility model discloses preferably technical scheme: the half shell has extension plate, the extension plate is located on the large surface of core package, and the extension plate extends outward from the opening, and the extension plates of two half shells are connected by butt joint.

[0007] The utility model discloses preferably technical scheme: two positive ear outer covers are equipped with positive cover plate, and the positive cover plate is connected two half shells, and two negative ear outer covers are equipped with negative cover plate, and the negative cover plate is connected two half shells.

[0008] The utility model discloses preferably technical scheme: another battery cell is stacked on the battery cell, the positive ear of four core packages is towards the same direction, and the negative ear of four core packages is towards the same direction.

[0009] The utility model discloses a better technical scheme: the positive pole cover plate and the negative pole cover plate below are provided with the adapter piece that presents H type, and the adapter piece has four connecting heads, and the four connecting heads below the positive pole cover plate are connected with four positive pole ears respectively, and the four connecting heads below the negative pole cover plate are connected with four negative pole ears respectively.

[0010] The utility model discloses a better technical scheme: the positive pole cover plate is provided with the positive pole column, and the positive pole column is connected with the adapter piece below the positive pole cover plate, and the negative pole cover plate is provided with the negative pole column, and the negative pole column is connected with the adapter piece below the negative pole cover plate.

[0011] The utility model discloses a better technical scheme: the positive pole column and the negative pole column all extend to the shell outside.

[0012] The utility model discloses a better technical scheme: the positive pole cover plate and its below the adapter piece between are provided with the plastic plate, and the negative pole cover plate and its below the adapter piece between are provided with the plastic plate.

[0013] The utility model discloses a better technical scheme: the positive pole cover plate is provided with the liquid injection hole.

[0014] The utility model discloses a battery with reduced length size has the following beneficial effects:

[0015] 1, increase the core package width size, reduce the core package length size, utilize the space of battery width direction, arrange the core package in the width direction, reduce the distance between the positive pole ear and the negative pole ear, make the current density distribution more uniform;

[0016] 2, the positive pole ear and the negative pole ear on the core package are close to the positioning end face setting, and two core packages are side by side, and the positioning end face is pasted, so that the positive pole ear and the negative pole ear on the two core packages are close to each other, after connecting the positive pole cover plate and the negative pole cover plate, the positive pole cover plate and the negative pole cover plate are located in the middle of the two ends of the battery, and the two half shells share the positive pole cover plate and the negative pole cover plate, compared with the conventional long size battery, the cost is more advantageous. DRAWINGS

[0017] The drawings incorporated into and forming a part of the specification illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings, which are not necessarily to scale, like numerals will be used to refer to like components throughout the several views. The drawings in the following description are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0018] Figure 1 It is the top view of the core package of the utility model embodiment.

[0019] Figure 2The top view of the shell of the embodiment of the utility model.

[0020] Figure 3 The top view of the positive cover plate of the embodiment of the utility model.

[0021] Figure 4 The top view of the adapter piece of the embodiment of the utility model.

[0022] Figure 5 The connection schematic view of the negative cover plate and the adapter piece of the embodiment of the utility model.

[0023] Figure 6 The schematic view of the core package and the cover plate connection of the embodiment of the utility model.

[0024] Figure 7 The core combination schematic view of the embodiment of the utility model.

[0025] Figure 8 The side view of the embodiment of the utility model.

[0026] In the drawing: 10, core package; 101, positioning end face; 11, positive pole lug; 12, negative pole lug; 20, half shell; 201, opening; 21, extension plate; 30, positive cover plate; 301, liquid injection hole; 31, positive pole; 40, negative cover plate; 41, negative pole; 50, adapter piece; 51, connecting head. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor fall within the protection scope of the utility model. It should be noted that, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other at will.

[0028] Please refer to Figures 1 to 8 A battery with reduced length size, comprising a cell and a shell covering the outside of the cell, the cell comprising two core packages 10 arranged side by side, the width size of the core package 10 being greater than the length size thereof, the positive pole lug 11 and the negative pole lug 12 being arranged at the two ends of the core package 10 along the length direction of the core package 10, the positive pole lug 11 and the negative pole lug 12 being respectively located at the two ends of the core package 10 and extending to the outside of the core package 10, the distance between the positive pole lug 11 and the negative pole lug 12 being reduced, thereby reducing the resistance and improving the current uniformity and reducing the heating of the battery.

[0029] The core package 10 is rectangular, has a positioning end face 101 which is an end face in the width direction of the core package 10. The positioning end faces 101 of the two core packages 10 are arranged in abutment so that the two core packages 10 are arranged in the width direction, making use of the space in the width direction of the battery, reducing the length dimension of the battery, and improving the space utilization rate, as shown in Figure 1 and Figure 7 .

[0030] The positive and negative tabs 11 and 12 are symmetrical about the core package 10, and are eccentrically arranged on the core package 10. Specifically, the positive and negative tabs 11 and 12 are arranged close to the positioning end face 101, so that when the positioning end faces 101 of the two core packages 10 are arranged in abutment, the positive tabs 11 of the two core packages 10 are close to each other, and the negative tabs 12 of the two core packages 10 are close to each other, thereby reducing the distance between the positive tabs 11 and the distance between the negative tabs 12, and reducing the requirement for the area of the adapter piece 50 when the positive cover plate 30 is subsequently installed.

[0031] In this embodiment, two battery cells are arranged, and the two battery cells are arranged in a stacked manner in the height direction, and the positive tabs 11 of the upper and lower battery cells are arranged on the same side, and the negative tabs 12 of the upper and lower battery cells are arranged on the same side, as shown in Figure 6 Correspondingly, the adapter piece 50 is H-shaped, and has four connecting heads 51 for connecting the positive tabs 11 or the negative tabs 12 of the four core packages 10, respectively.

[0032] Please refer to Figures 3 to 6 , the positive tab 11 is provided with a positive cover plate 30, and the negative tab 12 is provided with a negative cover plate 40. The adapter piece 50 is arranged below the positive cover plate 30, and the four connecting heads 51 of the adapter piece 50 are welded to the positive tabs 11 of the four core packages 10, respectively. The positive cover plate 30 is provided with a positive column 31 in the middle, one end of the positive column 31 is welded to the adapter piece 50 and is connected to the core package 10, and the other end of the positive column 31 extends to the outside of the shell. A plastic plate is arranged between the positive cover plate 30 and the adapter piece 50 to seal the battery. The positive cover plate 30 is further provided with a liquid injection hole 301, through which liquid is injected into the battery. Another adapter piece 50 is arranged below the negative cover plate 40, and the four connecting heads 51 of the adapter piece 50 are welded to the negative tabs 12 of the four core packages 10, respectively. The negative cover plate 40 is provided with a negative column 41 in the middle, one end of the negative column 41 is welded to the adapter piece 50 and is connected to the core package 10, and the other end of the negative column 41 extends to the outside of the shell. Another plastic plate is arranged between the negative cover plate 40 and the adapter piece 50 to seal the battery.

[0033] The shell comprises two half shells 20, the half shells 20 are rectangular to match the shape of the core packs 10, and an opening 201 is arranged on each half shell 20, the openings 201 are arranged in the width direction of the core packs 10, and the openings 201 of the two half shells 20 are oppositely arranged, when the shell is installed, the openings 201 of the half shells 20 are sleeved on the side edges of the core packs 10, and the two half shells 20 are moved towards each other until the ends of the extension plates 21 of the two half shells 20 are butted, and then the two half shells 20 are welded and connected, so as to fix the two half shells 20.

[0034] Further, the extension plates 21 are arranged on the half shells 20, the extension plates 21 are straight plates connected with the half shells 20, the extension plates 21 are coplanar with the large surfaces of the half shells 20, and extend to the outside of the openings 201, so that the side surfaces at the openings 201 are U-shaped, the positive electrode cover plates 30 and the negative electrode cover plates 40 are respectively arranged between the two openings 201 and connected with the two shells, and the two half shells 20 share the positive electrode cover plates 30 and the negative electrode cover plates 40, compared with the conventional welding of the long-size battery shell, the cost of the shell is reduced.

[0035] When the shell is installed, the openings 201 of the two half shells 20 are opposite, the half shells 20 are sleeved on the side edges of the core packs 10 through the openings 201, the two half shells 20 are moved towards each other until the ends of the extension plates 21 of the two half shells 20 are butted, and then the two half shells 20 are welded and connected, so as to fix the two half shells 20; the positive electrode cover plates 30 are arranged above the positive electrode tabs 11, the positive electrode posts 31 on the positive electrode cover plates 30 are connected with the four positive electrode tabs 11 through the adapter plates 50, one pair of sides of the positive electrode cover plates 30 are welded and connected with the half shells 20, the other pair of sides of the positive electrode cover plates 30 are welded and connected with the extension plates 21, and the positive electrode cover plates 30 are fixed between the two half shells 20; the negative electrode cover plates 40 are arranged above the negative electrode tabs 12, the negative electrode posts 41 on the negative electrode cover plates 40 are connected with the four negative electrode tabs 12 through the adapter plates 50, one pair of sides of the negative electrode cover plates 40 are welded and connected with the half shells 20, the other pair of sides of the negative electrode cover plates 40 are welded and connected with the extension plates 21, and the negative electrode cover plates 40 are fixed between the two half shells 20.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery of reduced length dimension, characterized by The application relates to a battery cell, which comprises a battery core and a shell arranged outside the battery core; the battery core comprises two core packs (10) arranged side by side in the width direction, the length of the core pack (10) is smaller than the width, the core pack (10) is provided with a positive electrode lug (11) and a negative electrode lug (12) in the length direction, the positive electrode lug (11) and the negative electrode lug (12) are respectively located at two ends of the core pack (10) and extend out of the core pack (10), the core pack (10) has a positioning end face (101) located in the width direction of the core pack (10), the positive electrode lug (11) and the negative electrode lug (12) are symmetrically arranged relative to the core pack (10), and the positive electrode lug (11) is close to the positioning end face (101); the positioning end faces (101) of the two core packs (10) are attached to each other.

2. The battery of claim 1, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one of the features of claim 1. The shell comprises two half shells (20), the half shell (20) has an opening (201) located in the width direction of the core pack (10), the openings (201) of the two half shells (20) are opposite to each other, and the two half shells (20) are respectively sleeved outside the core pack (10) through the openings (201).

3. The battery of claim 2, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one of the features of claim 1. The half shell (20) has an extension plate (21) located on the large face of the core pack (10), and the extension plate (21) extends outwards from the opening (201); the extension plates (21) of the two half shells (20) are connected in abutment.

4. The battery of claim 2 or 3, wherein the length of the battery is reduced by at least 10% compared to a battery of the same design without the at least one of the features. The positive electrode lugs (11) are provided with a positive electrode cover plate (30), the positive electrode cover plate (30) is connected to the two half shells (20); the negative electrode lugs (12) are provided with a negative electrode cover plate (40), and the negative electrode cover plate (40) is connected to the two half shells (20).

5. The battery of claim 4, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one protrusion. Another battery cell is stacked on the battery cell, the positive electrode lugs (11) of the four core packs (10) face the same direction, and the negative electrode lugs (12) of the four core packs (10) face the same direction.

6. The battery of claim 5, wherein the length of the battery is reduced by at least 10% compared to a battery having the same dimensions but without the at least one protrusion. The positive electrode cover plate (30) and the negative electrode cover plate (40) are provided with an H-shaped adapter plate (50) below, the adapter plate (50) has four connecting heads (51); the four connecting heads (51) below the positive electrode cover plate (30) are connected to the four positive electrode lugs (11) respectively, and the four connecting heads (51) below the negative electrode cover plate (40) are connected to the four negative electrode lugs (12) respectively.

7. The battery of claim 6, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one protrusion. The positive electrode cover plate (30) is provided with a positive electrode column (31), the positive electrode column (31) is connected to the adapter plate (50) below the positive electrode cover plate (30); the negative electrode cover plate (40) is provided with a negative electrode column (41), and the negative electrode column (41) is connected to the adapter plate (50) below the negative electrode cover plate (40).

8. The battery of claim 7, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one protrusion. The positive electrode column (31) and the negative electrode column (41) extend out of the shell.

9. The battery of claim 6, wherein the length of the battery is reduced by at least 20% compared to a battery having the same dimensions but without the at least one of the features of claims 1-6. Plastic plates are arranged between the positive electrode cover plate (30) and the adapter plate (50) below the positive electrode cover plate (30), and plastic plates are arranged between the negative electrode cover plate (40) and the adapter plate (50) below the negative electrode cover plate (40).

10. The battery of claim 4, wherein the length of the battery is reduced. The positive electrode cover plate (30) is provided with a liquid injection hole (301).

Images