Battery shell assembly and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery shell assembly and a battery, and aims to solve the problem of low liquid injection efficiency or poor safety caused by single-cavity arrangement of the conventional battery. Therefore, the utility model provides the battery shell assembly which comprises a shell and a cover plate, the cover plate or the shell is provided with a first through hole, the battery shell assembly further comprises a partition plate, the shell comprises a first cavity located on the first side of the partition plate and a second cavity located on the second side of the partition plate, and the first cavity is communicated with the first through hole. The partition plate is provided with a second through hole communicated with the first cavity and the second cavity. The partition plate is arranged in the shell so as to divide the internal space of the shell into the first cavity and the second cavity which are communicated through the second through hole, and gas generated by the battery cell in the second cavity enters the first cavity through the second through hole and then is discharged from the first through hole; or the liquid injected from the first through hole is concentrated in the first cavity and quickly flows into the second cavity through the second through hole to infiltrate the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, provide a kind of battery shell assembly and battery specifically. BACKGROUND

[0002] With the improvement of people's living standards and the enhancement of environmental awareness, the new energy industry has developed rapidly, which includes lithium batteries.

[0003] The existing battery usually includes a shell, a battery cell received in the shell, a cover plate provided at an end of the shell, and a liquid injection hole and an explosion-proof valve provided on the cover plate. However, the inside of the shell is usually a single cavity, and the battery cell fills the space inside the shell. Therefore, when liquid is injected or gas is discharged through the through hole, the injected liquid cannot quickly flow into the shell to soak the battery cell, or the gas generated by the battery cell cannot quickly concentrate and be discharged from the through hole, thereby affecting the efficiency of liquid injection or gas discharge.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] The utility model aims to solve the above technical problems, i.e., to solve the technical problems of low liquid injection efficiency and poor safety caused by the single cavity design inside the existing shell.

[0006] In a first aspect, the utility model provides a battery shell assembly, which includes a shell, a cover plate provided on the shell, the cover plate or the shell is provided with a first through hole, the battery shell assembly further includes a partition plate fixed inside the shell, the shell includes a first cavity on a first side of the partition plate and a second cavity on a second side of the partition plate, the first cavity is in communication with the outside of the shell through the first through hole, and the partition plate is provided with a second through hole in communication with the first cavity and the second cavity.

[0007] In the above technical solution, the partition plate is provided in the shell to divide the internal space of the shell into a first cavity and a second cavity in communication through the second through hole, so that the gas generated by the battery cell in the second cavity enters the first cavity through the second through hole, which is conducive to the concentration of the gas in the first cavity and the discharge from the first through hole, or the liquid injected from the first through hole is concentrated in the first cavity and quickly flows into the second cavity through the second through hole to soak the battery cell, thereby improving the efficiency of liquid injection.

[0008] In the preferred technical solution of the above battery shell assembly, the battery shell assembly further includes an explosion-proof valve, and the explosion-proof valve covers the first through hole.

[0009] In the preferred technical solution of the above battery shell assembly, the first through hole is a liquid injection hole.

[0010] In the preferred technical solutions of the battery shell assembly, the second through hole is arranged in multiple and along the length direction of the partition plate; and / or the second through hole is in the shape of a racetrack, a circle or a polygon.

[0011] In the preferred technical solutions of the battery shell assembly, the shell comprises a first surface, and the partition plate is parallel to the first surface.

[0012] In the preferred technical solutions of the battery shell assembly, the shell further comprises a second surface located on both sides of the first surface, the area of the second surface is greater than that of the first surface, and the end of the partition plate is fixedly connected with the second surface.

[0013] In the preferred technical solutions of the battery shell assembly, the height of the first cavity is h1, and the height of the second cavity is h2, wherein 0.01≤h1 / h2≤0.1.

[0014] In the preferred technical solutions of the battery shell assembly, the distance between the end surface of the partition plate and the end surface of the shell is w, wherein 1mm≤w≤20mm.

[0015] In the preferred technical solutions of the battery shell assembly, the first cavity is located above the second cavity.

[0016] In the second aspect, the utility model also provides a battery, the battery includes the battery shell assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0018] Figure 1 is the perspective view of the battery shell of the utility model;

[0019] Figure 2 is Figure 1 the front view of the battery shell of the utility model;

[0020] Figure 3 is Figure 1 the top view of the battery shell of the utility model;

[0021] Figure 4 is Figure 1 the right view of the battery shell of the utility model;

[0022] Figure 5 is the explosion view of the battery of the utility model;

[0023] Figure 6 is Figure 1 the front view of the shell of the battery shell of the utility model;

[0024] Figure 7 is Figure 6 a cross-sectional view of the shell along line A-A shown in

[0025] Figure 8 is Figure 7 a cross-sectional view of the shell along line B-B shown in

[0026] List of reference signs:

[0027] 100, battery shell; 1, shell; 11, first surface; 12, second surface; 2, cover plate; 21, first through hole; 3, pole column; 4, partition plate; 41, second through hole; 5, first cavity; 6, second cavity; 7, tab; 200, battery cell. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0029] It should be noted that in the description of the present application, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "back" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In one embodiment, as Figures 1 to 5 shown, the battery shell assembly 100 provided by the present application comprises a shell 1 and a cover plate 2 provided on the shell 1, and the cover plate 2 or the shell 1 is provided with a first through hole 21.

[0032] Preferably, the shell 1 can be a rectangular parallelepiped, or a cylinder or other geometric body; further, the shell 1 can be an aluminum shell, or a steel shell or a shell made of other materials, etc., which is not specifically limited here.

[0033] More preferably, the length direction end of the shell 1 is provided with an opening, the opening is in communication with the inside of the shell 1, facilitating the placement of the battery cell. In other embodiments, the opening can also be provided with two, as shown in the figure, which is not limited here. Figure 5

[0034] More preferably, the number of cover plates 2 is the same as the number of openings and one-to-one correspondence, so as to respectively close the openings.

[0035] Further preferably, the shape of the cover plate 2 is adapted to the shape of the opening, so that the cover plate 2 blocks the opening and is fixedly connected with the shell 1, thereby forming a closed cavity in the shell 1 to accommodate the electrolyte and the battery cell 200.

[0036] Further, the first through hole 21 is provided on the cover plate 2 or the shell 1, and the first through hole 21 is used to communicate with the internal space of the shell 1, so as to inject liquid or connect the explosion-proof valve, thereby meeting different needs.

[0037] Further, when the first through hole 21 is provided on the cover plate 2, the first through hole 21 penetrates the cover plate 2, and since the thickness of the cover plate 2 is greater than the wall thickness of the shell 1, the first through hole 21 is facilitated to be formed, and the stability of the structure is ensured; when the first through hole 21 is provided on the shell 1, the first through hole 21 can be provided at the desired position of the shell 1, and the position is flexible.

[0038] In an embodiment, the battery shell assembly 100 further comprises a partition plate 4 fixedly arranged in the shell 1, and the shell 1 comprises a first cavity 5 on a first side of the partition plate 4 and a second cavity 6 on a second side of the partition plate 4.

[0039] Preferably, the partition plate 4 is accommodated in the shell 1, and the partition plate 4 is fixedly connected with the inner surface of the shell 1, so as to be fixed in the shell 1. The above-mentioned fixed connection can adopt existing fixed connection modes such as welding.

[0040] More preferably, the shape of the partition plate 4 is adapted to the shape of the shell 1, so that part of the side surface of the partition plate 4 abuts on the inner surface of the shell 1, so that the connection is more stable.

[0041] More preferably, the material of the partition plate 4 is the same as that of the shell 1, so as to be fixed by welding.

[0042] Further preferably, the first cavity 5 and the second cavity 6 are respectively located on the two sides of the partition plate 4, and the first cavity 5 and the second cavity 6 constitute the overall internal space of the shell 1.

[0043] Further, the second cavity 6 contains the battery cell 200 and the electrolyte, thereby realizing the basic function of the battery

[0044] ​Further, the first cavity 5 is used to form a space for gas or liquid flow, so as to realize rapid flow of gas or liquid in the shell 1 and improve the efficiency of gas or liquid circulation in the shell 1.

[0045] In an embodiment, the first cavity 5 is communicated with the outside of the shell 1 through the first through hole 21, and the partition plate 4 is provided with a second through hole 41 communicating the first cavity 5 and the second cavity 6, as shown in Figures 1 to 8 .

[0046] Preferably, the first through hole 21 is used to communicate the first cavity 5 and the outside space of the shell 1, so as to facilitate liquid injection or gas discharge in the shell 1.

[0047] More preferably, the first cavity 5 is communicated with the first through hole 21, and the liquid injected from the first through hole 21 can first flow rapidly into the first cavity 5, so as to prepare for subsequent rapid flow into the second cavity 6 to soak the battery cell 200, which is beneficial to improve the efficiency of liquid injection, or the gas generated in the shell 1 can be rapidly concentrated in the first cavity 5, so as to be rapidly discharged from the first through hole 21, thereby ensuring the efficiency of gas discharge and use safety.

[0048] Further preferably, the second through hole 41 is arranged on the partition plate 4 and communicates the first cavity 5 and the second cavity 6, so that the electrolyte injected into the first cavity 5 can rapidly flow into the second cavity 6 through the second through hole 41, or the gas generated by the battery cell and the electrolyte in the second cavity 6 at high temperature can rapidly enter the first cavity 5 through the second through hole 41, thereby ensuring the use safety of the battery.

[0049] In an embodiment, the battery shell assembly 100 further comprises an explosion-proof valve covering the first through hole 21.

[0050] Preferably, the explosion-proof valve is arranged to be broken when the temperature or gas pressure in the shell 1 reaches a critical value, so that the gas in the explosion-proof valve can be rapidly discharged through the first through hole 21, thereby ensuring the use safety of the battery.

[0051] More preferably, the explosion-proof valve covers the first through hole 21, so as to block the first through hole 21 when the battery is normally used, thereby preventing internal electrolyte leakage, and when the gas pressure or temperature in the shell 1 reaches a critical value, the explosion-proof valve is broken to discharge the gas in the shell 1 from the first through hole 21, thereby ensuring the use safety of the battery.

[0052] Further preferably, the shape of the explosion-proof valve is matched with the shape of the first through hole 21, such as a racetrack shape, a circular shape, a polygonal shape, etc., and the specific shape can be set according to needs, which is not limited here.

[0053] Further preferably, the explosion-proof valve can be arranged outside the first through hole 21, or inside the first through hole 21, which can be arranged as required, and is not specifically limited herein.

[0054] In an embodiment, the first through hole 21 is a liquid injection hole.

[0055] Preferably, the first through hole 21 is a liquid injection hole, so that liquid injection is performed through the first through hole 21, and after the liquid injection is completed, the first through hole 21 is sealed by the sealing member, so as to enable normal use of the battery and ensure the sealing effect of the internal space of the shell 1.

[0056] It should be noted that the sealing member is a prior art, which is not described herein.

[0057] In an embodiment, the second through hole 41 is arranged in multiple numbers and arranged along the length direction of the separator 4; and / or, the second through hole 41 is in a runway shape, a circular shape or a polygonal shape, as shown in Figure 8 .

[0058] Preferably, the second through hole 41 can be arranged in two, three or multiple numbers, and the number of the second through hole 41 can be arranged as required, which is not specifically limited herein.

[0059] More preferably, the multiple second through holes 41 are arranged in sequence, and the arrangement direction of the multiple second through holes 41 is consistent with the length direction of the separator 4, so as to take into account the needs of liquid injection or exhaust in different regions in the length direction.

[0060] Further preferably, the multiple second through holes 41 are arranged at equal intervals, so that the liquid injection or exhaust is more uniform and the effect is more significant.

[0061] Further preferably, the second through hole 41 can also be arranged in multiple rows along the length direction of the separator 4, which is not specifically limited herein.

[0062] Further, the second through hole 41 can be in a runway shape, a circular shape or a polygonal shape, and the shape of the second through hole 41 can be arranged as required, which is not specifically limited herein.

[0063] In an embodiment, the shell 1 comprises a first surface 11, and the separator 4 is parallel to the first surface 11, as shown in Figure 7 .

[0064] Preferably, the first surface 11 is located at one side of the shell 1 in the width direction, and the first surface 11 is arranged to extend along the length direction of the shell 1.

[0065] More preferably, the first surface 11 is arranged in two numbers and located at both sides of the shell 1 in the width direction, and the two first surfaces 11 are arranged in parallel to each other, and the two first surfaces 11 are arranged to place the battery cell therebetween.

[0066] More preferably, the first surface 11 is a cuboid. In other embodiments, the first surface 11 may also be a circle or other geometric shapes, etc., which are not specifically limited here.

[0067] In one embodiment, the outer casing 1 further includes a second surface 12 located on both sides of the first surface 11, the area of ​​the second surface 12 being larger than the area of ​​the first surface 11, and the end of the partition 4 being fixedly connected to the second surface 12, such as... Figure 7 As shown.

[0068] Preferably, the second surface 12 is located between the two first surfaces 11, and the end of the second surface 12 is fixedly connected to the first surface 11, such as by welding or integral molding, thereby improving the structural stability.

[0069] More preferably, the two second surfaces 12 are both located between the two first surfaces 11, and the first surfaces 11 and the second surfaces 12 are spaced apart to form a housing 1, thereby forming a cavity inside to accommodate the battery cell 200.

[0070] Preferably, the area of ​​the second surface 12 is larger than the area of ​​the first surface 11, so that the partition 4 is parallel to the smaller first surface 11, effectively reducing the volume of the first cavity 5 and improving the space utilization rate inside the outer shell 1.

[0071] More preferably, the partition 4 is located between the two second surfaces 12, and the two end faces of the partition 4 in the width direction are respectively fixedly connected to the second surfaces 12 located on both sides, thereby effectively fixing the partition 4 inside the outer shell 1 and improving the structural stability. This fixed connection can be a fixed connection method such as welding, and is not specifically limited here.

[0072] In one embodiment, the height of the first cavity 5 is h1, and the height of the second cavity 6 is h2, wherein 0.01 ≤ h1 / h2 ≤ 0.1. Figure 7 As shown.

[0073] Preferably, in the height direction, i.e. the width direction of the outer casing 1 ( Figure 7 (Up and down direction in the middle), the height h1 of the first cavity 5 is the distance between the first surface 11 near the partition 4 and the partition 4, and this distance is sufficient to meet the needs of liquid injection or venting.

[0074] More preferably, in the height direction, the height h2 of the second cavity 6 is the distance between the first surface 11 away from the partition 4 and the partition 4, which is sufficient to accommodate the battery cell in order to meet the discharge requirements.

[0075] More preferably, h1 / h2 is any value between 0.01 and 0.1, such as 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, etc., the specific value of which can be set as needed, which is not specifically limited here.

[0076] It should be noted that the above range of h1 / h2 is limited, so as to not only achieve the needs of rapid exhaust and liquid injection, but also maximize the volume of the second cavity 6, so as to maximize the energy density of the electric energy.

[0077] In an embodiment, the distance between the end face of the partition plate 4 and the end face of the shell 1 is w, wherein 1mm≤w≤20mm, as shown in Figure 8 .

[0078] Preferably, there is a gap between one end of the partition plate 4 and the corresponding end face of the shell 1, or between both ends of the partition plate 4 and the corresponding end faces of the shell 1, which is conducive to the passage of gas or liquid and improves the efficiency of exhaust or liquid injection.

[0079] It should be noted that the above gap is set to one and located on one side of the length direction of the partition plate 4, or two and located on both sides of the length direction of the partition plate 4, so as to meet different application needs.

[0080] More preferably, the partition plate 4 is located inside the shell 1, and the distance between the length direction end face of the partition plate 4 and the length direction end face of the shell 1 on the same side can be any value between 1mm and 20mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc., the specific value of which can be set as needed, which is not specifically limited here.

[0081] In an embodiment, the first cavity 5 is located above the second cavity 6, as shown in Figure 7 .

[0082] Preferably, the first cavity 5 is located above the second cavity 6 in the height direction, so that the electrolyte entering the first cavity 5 quickly passes through the second through hole 41 into the second cavity 6 under the action of gravity to soak the battery cell; and the gas generated by the battery cell can quickly move upward and pass through the second through hole 41 to concentrate on the first cavity 5.

[0083] In other embodiments, the first cavity 5 can also be below the second cavity 6 or on one side of the length direction or width direction, etc., which can be set as needed by the user, which is not specifically limited here.

[0084] In one embodiment, the cover plate 2 is provided with a pole 3, and the end of the battery cell 200 is provided with a tab 7, as shown. Figure 5

[0085] Preferably, the pole 3 is fixedly connected with the cover plate 2 in an insulated manner, so as to fix the pole 3 on the cover plate 2 and insulate the pole 3 from the cover plate 2, so as to output the electric energy of the battery.

[0086] More preferably, the pole 3 penetrates the inner and outer surfaces of the cover plate 2, one end of the pole 3 is electrically connected with the tab 7, and the other end of the pole 3 extends to the outside of the cover plate 2, so as to be electrically connected with the external structure, so as to achieve the purpose of outputting the electric energy.

[0087] Further preferably, the tab 7 is arranged at one end of the battery cell 200, which can be arranged at the end of the battery cell 200 close to the pole 3, or other end, etc., and the user can arrange it according to the needs, which is not specifically limited here.

[0088] In one embodiment, the utility model also provides a battery, the battery includes the battery shell assembly 100.

[0089] Those skilled in the art can understand that, although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the application and forms different embodiments. For example, in the claims of the application, any one of the claimed embodiments can be used in any combination.

[0090] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the utility model, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.​

Claims

1. A battery casing assembly, comprising a housing and a cover plate disposed on the housing, wherein the cover plate or the housing has a first through hole, characterized in that, The battery housing assembly further includes a partition fixed inside the housing. The housing includes a first cavity on a first side of the partition and a second cavity on a second side of the partition. The first cavity communicates with the outside of the housing through a first through hole. The partition is provided with a second through hole connecting the first cavity and the second cavity.

2. The battery casing assembly according to claim 1, characterized in that, The battery housing assembly also includes an explosion-proof valve that covers the first through hole.

3. The battery casing assembly according to claim 1, characterized in that, The first through hole is a liquid injection hole.

4. The battery housing assembly according to any one of claims 1 to 3, characterized in that, The second through hole is provided in multiple parts and is arranged along the length direction of the partition; And / or, the second through hole is racetrack-shaped, circular, or polygonal.

5. The battery housing assembly according to claim 4, characterized in that, The outer casing includes a first surface, and the partition is parallel to the first surface.

6. The battery housing assembly according to claim 5, characterized in that, The outer casing also includes a second surface located on both sides of the first surface, the area of ​​the second surface being larger than the area of ​​the first surface, and the end of the partition being fixedly connected to the second surface.

7. The battery housing assembly according to claim 6, characterized in that, The height of the first cavity is h1, and the height of the second cavity is h2, wherein 0.01≤h1 / h2≤0.

1.

8. The battery housing assembly according to claim 7, characterized in that, The distance between the end face of the partition and the end face of the outer shell is w, where 1mm≤w≤20mm.

9. The battery housing assembly according to claim 8, characterized in that, The first cavity is located above the second cavity.

10. A battery, characterized in that, Includes the battery housing assembly according to any one of claims 1 to 9.

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