CN220895792U - Conductive battery shell structure and battery pack - Google Patents

Abstract

The utility model provides a conductive battery shell structure and battery package, conductive battery shell structure includes insulating part and two conductive parts, and insulating part is established between two conductive parts for independent between two conductive parts, insulating part respectively with two conductive parts insulation connection, separate mutual electric conduction between two conductive parts, conductive part is including being used for the conductive surface with other battery contact, and conductive surface has electric conductivity, the overcurrent capacity of the battery of improvement, need not the welding between conductive part and the insulating part simultaneously, prevents that the welding position from producing the potential safety hazard because of the battery high temperature, improves the security of battery.

Description

Conductive battery shell structure and battery pack

Technical Field

The invention belongs to the field of battery shell manufacturing, and particularly relates to a conductive battery shell and a battery pack.

Background

Conventional battery cases are typically provided with a post structure that integrates a post and a cover plate, serving as a bridge for connection of the cells to external circuitry. The pole is an external protruding structure, and half is arranged on one side or two corresponding sides of the battery shell. When the battery is manufactured and assembled into a battery pack, the poles of the batteries need to be connected in series, and the arrangement direction of the batteries is limited due to the orientation of the poles, so that the batteries are generally placed vertically or upside down. And a space needs to be reserved for the pole, which limits the number of batteries, thereby reducing the energy density of the battery pack. On the other hand, the external pole is connected with the battery core through welding, and the temperature rise of the welding part is very fast due to the fact that overcurrent is very large, so that the safety problem of the battery is easily caused.

Like patent CN201920465023.8 cylindrical battery and battery module, the device is with just, the negative pole post is installed at the battery both ends, the electric core is installed inside the battery casing, need not to weld utmost point post and battery together, and in order to improve battery conductivity, establish the sleeve cover that has conductivity in battery casing one end, install the battery together through the battery anchor clamps and form battery module, but the overcurrent capacity of battery of this mode only exists in the sleeve of bottom, the overcurrent capacity of battery is limited, then still there is the restriction to the battery quantity in the battery package, simultaneously for improving sleeve and battery casing's steadiness, the device adopts welding method to be connected sleeve and battery casing as an organic whole, still there is the excessive current of welded part, the drawback that the intensification is fast.

Disclosure of utility model

The utility model provides a conductive battery shell structure and a battery pack, which solve the problems of limited battery overcurrent capacity and welding in a battery by increasing the overcurrent capacity of the battery and arranging the battery without welding, thereby improving the overcurrent capacity of the battery and the safety of the battery.

The conductive battery shell structure comprises an insulating part and two conductive parts, wherein the insulating part is arranged between the two conductive parts so as to be respectively connected with the two conductive parts in an insulating way; the conductive portion includes a conductive surface for contacting other cells.

The whole battery shell is used as a conductive part, so that the overcurrent capacity of the battery is improved, the battery shell is divided through the insulating part, welding is not needed, no welding setting of the battery is realized, and the safety of the battery is improved.

In the present utility model, the insulating part is preferably made of plastic, and the insulating part is connected with the conductive parts on both sides in an insulating manner by plastic heat sealing.

Preferably, the conductive parts are semi-shell structures with openings, and the openings of the two conductive parts are arranged towards the insulating part.

Preferably, the insulating part comprises an annular insulating part which is connected with the openings of the conductive parts at two sides in an insulating way, and the insulating part splices the two conductive parts into a battery case for accommodating the electric cells.

Preferably, the one conductive part further comprises an insulating surface provided with an explosion-proof valve and a liquid injection hole, and the insulating surface is connected with the insulating piece.

In a preferred aspect of the present utility model, a terminal for electrically connecting the conductive portion and the battery cell is further provided in the battery case.

Preferably, one end of the pole is inserted into the battery core, and the other end of the pole is connected with the conductive surface of the conductive part.

Preferably, the electrode post includes a positive electrode post mounted on one of the conductive portions and a negative electrode post mounted on the other conductive portion.

A battery pack comprises a plurality of battery units which are connected with each other, wherein each battery unit comprises the conductive battery shell structure.

In summary, the utility model has the following beneficial effects:

1. The utility model provides a battery case which is used as a conductive component, so that the whole battery is of a conductive structure, and the overcurrent capacity of the battery is greatly improved.

2. The battery shell provided by the utility model truly realizes zero laser welding and improves the safety of the battery.

Drawings

Fig. 1 is a schematic view of a battery case.

Fig. 2 is a top view of the present utility model.

Fig. 3 is a schematic diagram of a parallel connection of battery packs.

Fig. 4 is a schematic diagram of a battery pack in series.

Reference numerals: insulating part 1, insulator 11, conductive part 2, conductive surface 21, explosion-proof valve 22, liquid injection hole 23, insulating surface 24, electric core 3, battery case 4, pole 5, positive pole 51, negative pole 52.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. 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 fall within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, a conductive battery case structure includes an insulating part 1 and two conductive parts 2, the insulating part 1 is arranged between the two conductive parts 2, so that the two conductive parts 2 are independent, the insulating part 1 is respectively connected with the two conductive parts 2 in an insulating way, the two conductive parts 2 are isolated from each other in a conductive way, the conductive parts 2 include conductive surfaces 21 used for contacting other batteries, the conductive surfaces 21 have conductivity, the overcurrent capacity of the batteries is improved, meanwhile, welding is not needed between the conductive parts 2 and the insulating parts 1, potential safety hazards caused by high temperature of the batteries are prevented from being generated at welding positions, and the safety of the batteries is improved.

The insulating part 1 is made of plastic, the insulating part 2 on two sides is connected with the insulating part through a plastic heat sealing mode, and is sealed, so that the connection between the conducting part 2 and the insulating part 1 is tight, the mode can replace welding, the safety of the battery is improved, particularly, at least one insulating part 1 is arranged, and the sealing modes of the insulating part 1 can be multiple.

As shown in fig. 1-2, the conductive parts 2 are semi-shell structures with openings, the openings of the two conductive parts 2 are arranged towards the insulating part 1, and the insulating part 1 is mounted at the opening of the conductive part 2.

As shown in fig. 2, the opening of the conductive part 2 is in a ring structure, so that the insulating part 2 is installed at the opening of the conductive part 2 in a ring structure, a ring-shaped insulating member 11 is formed to splice the two conductive parts 2 into a battery case 4, and a battery cell 3 is installed inside the battery case 4, and the battery cell 3 supplies current to the battery.

As shown in fig. 3 to 4, one of the conductive parts 2 includes an insulating surface 24, and the insulating surface 24 has insulation and does not conduct electricity with the other conductive surfaces 21, so that an explosion-proof valve 22 and a liquid injection hole 23 are arranged on the insulating surface 24, so that the safety of the explosion-proof valve 22 and the liquid injection hole 23 is ensured, the insulating surface 24 is connected with the insulating member 11, and the insulating surface 24 is not contacted with the other conductive surfaces 21 in the battery connection process.

As shown in fig. 2, the structure further comprises a pole 5 for electrically connecting the conductive part 2 and the battery core 3, one side of the pole 5 is connected with the conductive part 2, the other side of the pole 5 is connected with the battery core 3 arranged in the battery shell 4 in an inserting mode, and the battery conducts the current of the battery core 3 to the conductive part 2 through the pole 5.

Specifically, since the pole 5 is used for transmitting the current of the electric core 3, the pole 5 is connected with the conductive surface 21 with conductivity, so as to receive the current transmitted by the pole 5 and transmit the current to other batteries.

As shown in fig. 2, the pole 5 includes a positive pole 51 installed on one of the conductive parts 2 and a negative pole 52 installed on the other conductive part 2, and the positive pole 51 and the negative pole 52 respectively supply current to the conductive parts 2, so that the two conductive parts 2 are separated into a positive pole and a negative pole, and the current is conducted to other batteries through the conductive surface 21, thereby improving the overcurrent capacity of the batteries.

The battery pack comprises a plurality of battery units which are connected with each other, wherein the battery units comprise the conductive battery shell structure, the battery units can be connected with each other in a series connection and parallel connection mode to form the battery pack, as shown in the attached figure 3, the double-layer parallel connection mode of the battery pack is that one side of the battery unit, which is provided with an explosion-proof valve 3 and a liquid injection hole 4, and one side of the battery unit, which is provided with the explosion-proof valve 3 and the liquid injection hole 4, are oppositely placed, and the other side of the battery unit faces upwards and downwards, so that the conductive part 2 with the positive pole 51 is connected with the conductive part 2 with the positive pole, the conductive part 2 with the negative pole 52 is connected with the conductive part 2 with the negative pole, namely, the positive pole is connected with the negative pole, and the double-layer parallel structure of the battery pack is realized.

As shown in fig. 4, the double-layer serial connection mode of the battery pack is that the side, provided with the explosion-proof valve 3 and the liquid injection hole 4, of the battery unit and the side, provided with the explosion-proof valve 3 and the liquid injection hole 4, of the other battery unit are also placed in opposite directions, so that the conductive part 2 with the positive pole 51 and the conductive part 2 with the negative pole 52 are connected, that is, the positive pole is connected with the negative pole, and the double-layer serial connection structure of the battery pack is realized.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (9)

1. A conductive battery case structure, characterized by comprising an insulating part (1) and two conductive parts (2), wherein the insulating part (1) is arranged between the two conductive parts (2) so as to be respectively connected with the two conductive parts (2) in an insulating way; the conductive part (2) comprises a conductive surface (21) for contacting other batteries.

2. The conductive battery case structure according to claim 1, wherein the insulating part (1) is made of plastic, and the insulating part (1) is connected with the conductive parts (2) on both sides in an insulating manner by means of plastic heat sealing.

3. A conductive battery case structure according to claim 1, characterized in that the conductive parts (2) are semi-shell structures having openings, the openings of the conductive parts (2) being arranged towards the insulating part (1).

4. A conductive battery case structure according to claim 1, wherein the insulating part (1) comprises a ring-shaped insulating member (11) which insulatively connects the conductive part openings on both sides, and the insulating member (11) splices the two conductive parts (2) into a battery case (4) for accommodating the battery cells (3).

5. The conductive battery case structure according to claim 4, wherein one of the conductive parts (2) further comprises an insulating surface (24) provided with an explosion-proof valve (22) and a liquid injection hole (23), and the insulating surface (24) is connected with the insulating member (11).

6. The conductive battery case structure according to claim 4, wherein the battery case (4) is further provided therein with a post (5) for electrically connecting the conductive portion (2) and the battery cell (3).

7. The conductive battery case structure according to claim 6, wherein one end of the pole (5) is inserted into the battery core (3), and the other end is connected to the conductive surface (21) of the conductive portion (2).

8. A conductive battery case structure according to claim 6, wherein the pole (5) comprises a positive pole (51) mounted on one of the conductive parts (2) and a negative pole (52) mounted on the other conductive part (2).

9. A battery pack comprising a plurality of interconnected battery cells, the battery cells comprising the electrically conductive battery housing structure of any one of claims 1-8.