Battery shell and battery

Abstract

The utility model discloses a battery shell and battery, the battery shell comprises a square shell and a frame body sleeved on the outer side of the square shell, the inner side surface of the frame body is bonded with the outer side surface of the square shell, a first clamping piece is arranged on one outer side surface of the frame body, and a second clamping piece is arranged on the other outer side surface of the frame body. The other outer side face of the frame body is provided with a second clamping piece used for being matched with the first clamping piece in a clamping mode. The method has the advantage that the production cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and in particular relates to a battery casing and a battery. Background Art

[0002] Conventional batteries, such as the square battery case and battery disclosed in application number CN202321774887.0, generally include a case body and a winding core formed by rolling a plurality of pole pieces, and the winding core is arranged in the case body.

[0003] During assembly, multiple batteries need to be put together to form a battery module, and then connected according to the specified series and parallel requirements, and finally the battery module is moved into the box through the lifting tool. Since the battery is a single part, there is a lack of matching relationship between two adjacent batteries. In order to ensure the stability of the battery module during transfer, it is necessary to set up additional pre-tightening tooling to limit the battery module. The tooling equipment investment is relatively large, and the complexity of the tooling equipment is increased, which is not conducive to controlling production costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a battery housing and a battery, which are helpful to reduce production costs.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a battery shell, including a square shell and a plastic frame sleeved on the outside of the square shell, the inner side of the plastic frame is bonded to the outer side of the square shell, a first clamping piece is arranged on one outer side of the plastic frame, and a second clamping piece for clamping and cooperating with the first clamping piece is arranged on the other outer side of the plastic frame.

[0006] Preferably, the first clamping member and the second clamping member are distributed on two opposite outer sides of the plastic frame.

[0007] Preferably, the first clamping member includes a plurality of first convex strips evenly spaced along the horizontal direction, and a first card slot is formed between two adjacent first convex strips; the second clamping member includes a plurality of second convex strips evenly spaced along the horizontal direction, and the plurality of second convex strips correspond one-to-one to the plurality of first card slots, and the second convex strips are inserted into the corresponding first card slots.

[0008] Preferably, the width of the first card slot gradually decreases from the slot bottom to the slot mouth, and the width of the second convex strip is adapted to the width of the first card slot.

[0009] Preferably, the plastic frame, the first convex strip, and the second convex strip are integrally formed.

[0010] Preferably, the height of the lower end surface of the square shell is lower than the height of the lower end surface of the plastic frame.

[0011] Preferably, the lower end of the first convex strip extends downward to form a first support block, and the lower end surface of the first support block and the lower end surface of the square shell are located on the same plane.

[0012] Preferably, the lower end of the second convex strip extends downward to form a second support block, and the lower end surface of the second support block and the lower end surface of the square shell are located on the same plane.

[0013] And a battery, comprising a winding core formed by rolling up a plurality of pole pieces and the above-mentioned battery shell, wherein the winding core is arranged in the square shell.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. By arranging a plastic frame outside the square shell, and arranging a first clamping member and a second clamping member on the outer side of the plastic frame, two adjacent batteries are clamped and matched by the first clamping member and the second clamping member during assembly to form a battery module. It can be seen that there is a certain matching relationship between the two adjacent batteries, and the grouped battery module has good stability. There is no need to set up additional pre-tightening tooling during transfer, which can reduce the complexity of tooling equipment and is conducive to reducing production costs;

[0016] 2. The plastic frame is easy to process and can improve the structural strength of the battery. It also has insulating properties, reducing the electrical contact between the battery and external metal components, reducing the risk of circuit short circuit and leakage, and helping to improve the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the battery housing in the utility model;

[0018] Figure 2 It is a schematic diagram of the partial structure of the side of the battery housing in the utility model;

[0019] Figure 3 The bottom partial structure of the battery housing in the utility model is shown in FIG. Figure 1 ;

[0020] Figure 4 The bottom partial structure of the battery housing in the utility model is shown in FIG. Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the structure of the battery in the utility model;

[0022] Figure 6 It is a schematic diagram of the structure when two batteries are grouped in the utility model.

[0023] In the figure: 1. square shell; 2. plastic frame; 21. first clamping piece; 211. first convex strip; 212. first slot; 213. first support block; 22. second clamping piece; 221. second convex strip; 222. second slot; 223. second support block; 3. winding core. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] Embodiment 1: Figure 1 As shown, a battery shell includes a square shell 1 and a plastic frame 2 sleeved on the outside of the square shell 1, the inner side of the plastic frame 2 is bonded to the outer side of the square shell 1, a first clamping piece 21 is provided on one outer side of the plastic frame 2, and a second clamping piece 22 for clamping and cooperating with the first clamping piece 21 is provided on the other outer side of the plastic frame 2.

[0027] In this embodiment, the first clamping member 21 and the second clamping member 22 are distributed on two opposite outer sides of the plastic frame 2 . During assembly, two adjacent plastic frames 2 are clamped together by the first clamping member 21 and the second clamping member 22 .

[0028] It should be noted that the square housing 1 is made of an aluminum structure and is used to accommodate the winding core 3, electrolyte and other components, and the plastic frame 2 is an injection molded part.

[0029] Embodiment 2: Figure 1 and Figure 2As shown, the rest of the parts are the same as those of the first embodiment, except that the first clamping member 21 includes a plurality of first convex strips 211 equally spaced in the horizontal direction, and a first slot 212 is formed between two adjacent first convex strips 211, and the second clamping member 22 includes a plurality of second convex strips 221 equally spaced in the horizontal direction, and the plurality of second convex strips 221 correspond to the plurality of first slots 212 one by one, and the second convex strips 221 are inserted into the corresponding first slots 212. Further, a second slot 222 is formed between two adjacent second convex strips 221, and the first convex strip 211 is inserted into the corresponding second slot 222.

[0030] In this embodiment, the width of the first slot 212 gradually decreases from the bottom of the slot to the slot mouth, and the width of the second protrusion 221 is adapted to the width of the first slot 212. Specifically, the first slot 212 is a dovetail slot, and the cross-section of the second protrusion 221 is a trapezoidal shape adapted to the dovetail slot. After connection, lateral separation can be avoided, which helps to improve the stability of the structure.

[0031] In this embodiment, the plastic frame 2, the first convex strip 211 and the second convex strip 221 are integrally formed.

[0032] In this embodiment, the height of the lower end surface of the square shell 1 is lower than the height of the lower end surface of the plastic frame 2. By leaving a certain gap at the lower end of the outer side surface of the square shell 1, when the group of battery modules is installed in the box, it is convenient for the square shell 1 to fully contact with the thermal conductive adhesive pre-applied on the bottom of the box to ensure the thermal conductivity effect.

[0033] Embodiment 3: Figure 3 As shown, the rest of the parts are the same as those of the second embodiment, except that the lower end of the first convex strip 211 extends downward to form a first support block 213, and the lower end surface of the first support block 213 is located on the same plane as the lower end surface of the square housing 1.

[0034] Embodiment 4: Figure 4 As shown, the rest of the parts are the same as those of the second embodiment, except that the lower end of the second convex strip 221 extends downward to form a second support block 223, and the lower end surface of the second support block 223 is located on the same plane as the lower end surface of the square housing 1.

[0035] In the third and fourth embodiments, by setting the first support block 213 at the lower end of the first convex strip 211, or setting the second support block 223 at the lower end of the second convex strip 221, the first support block 213 and the second support block 223 play a supporting role, which can reduce the influence of the weight of the plastic frame 2 itself on the bonding effect between the plastic frame 2 and the battery casing, and even if the bonding effect fails, it can prevent the plastic frame 2 from moving downward, which helps to improve the stability of the structure; further, only the first support block 213 is set at the lower end of the first convex strip 211, or the second support block 223 is set at the lower end of the second convex strip 221. After assembly, the support block will not completely isolate the thermal conductive adhesive under the two adjacent battery casings, which can ensure the thermal conductive effect.

[0036] Embodiment 5: Figure 5 and Figure 6 As shown, a battery includes a winding core 3 formed by rolling a plurality of pole pieces and a battery shell of any one of embodiments 1 to 4, wherein the winding core 3 is arranged in a square shell 1, and the upper end cover of the square shell 1 is provided with an upper cover (not shown in the figure).

[0037] After the number of batteries is determined according to the series-parallel relationship, the corresponding number of batteries are engaged and matched through the first engaging member 21 and the second engaging member 22 to obtain the required battery module.

[0038] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A battery housing, comprising a square housing (1), characterized in that It also comprises a plastic frame (2) sleeved on the outside of the square shell (1), the inner side surface of the plastic frame (2) being bonded to the outer side surface of the square shell (1), a first clamping piece (21) being arranged on one outer side surface of the plastic frame (2), and a second clamping piece (22) for clamping and cooperating with the first clamping piece (21) being arranged on the other outer side surface of the plastic frame (2).

2. A battery casing according to claim 1, characterized in that The first clamping piece (21) and the second clamping piece (22) are distributed on two opposite outer sides of the plastic frame (2).

3. A battery casing according to claim 1 or 2, characterized in that The first clamping member (21) comprises a plurality of first convex strips (211) distributed at equal intervals in a horizontal direction, a first clamping groove (212) is formed between two adjacent first convex strips (211), and the second clamping member (22) comprises a plurality of second convex strips (221) distributed at equal intervals in a horizontal direction, the plurality of second convex strips (221) correspond one-to-one to the plurality of first clamping grooves (212), and the second convex strips (221) are inserted into the corresponding first clamping grooves (212).

4. A battery casing according to claim 3, characterized in that The width of the first clamping groove (212) gradually decreases from the groove bottom to the groove mouth, and the width of the second convex strip (221) is adapted to the width of the first clamping groove (212).

5. A battery casing according to claim 3, characterized in that The plastic frame (2), the first convex strip (211), and the second convex strip (221) are integrally formed.

6. A battery casing according to claim 3, characterized in that The height of the lower end surface of the square housing (1) is lower than the height of the lower end surface of the plastic frame (2).

7. A battery casing according to claim 6, characterized in that The lower end of the first convex strip (211) extends downward to form a first support block (213), and the lower end surface of the first support block (213) and the lower end surface of the square housing (1) are located on the same plane.

8. A battery casing according to claim 6, characterized in that The lower end of the second convex strip (221) extends downward to form a second support block (223), and the lower end surface of the second support block (223) and the lower end surface of the square housing (1) are located on the same plane.

9. A battery, comprising a winding core (3) formed by rolling up a plurality of pole pieces and a battery casing disclosed in any one of claims 1 to 8, wherein the winding core (3) is arranged in the square casing (1).

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