Battery electricity collection structure and battery pack with same

Abstract

The utility model discloses a battery electricity collection structure and a battery pack with the same, relates to the technical field of battery packs, and solves the problems that a battery pack system connected by a lead is not stable enough in structure and poor contact is easily caused by lead looseness. The device comprises a positive pole electricity collecting structure and a negative pole electricity collecting structure which are electrically connected with a positive pole and a negative pole of a battery respectively, the positive pole electricity collecting structure and the negative pole electricity collecting structure are consistent, the positive pole electricity collecting structure comprises a conductive plate and a bus plate, one side of the bus plate is bent to form a connecting part, the connecting part is attached to the conductive plate, and the conductive plate is electrically connected with a positive pole column or a negative pole column. And the other side of the bus board is fixedly attached to the positive electrode or the negative electrode of the battery, and the battery pack adopts the battery power acquisition structure. Compared with a traditional wire connection mode, the current-conducting plates and the bus plates in the scheme serve as wires, the load capacity is high, breakage and bending are not prone to occurring, poor contact is not prone to occurring, and the working stability of the battery is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery power collection structure and a battery pack having the same. Background Technology

[0002] The battery pack comprises multiple cells connected in series and parallel. Several cells are placed within the battery system housing and then connected in series and parallel via wires. This module-less structure eliminates the module assembly process of Form 1, resulting in significant optimization in both structure and manufacturing process. This reduces manufacturing and material costs, and due to the simplified structure, it achieves higher energy density and volumetric density. The cells, connected in series and parallel, are then connected to the positive and negative terminals of the battery via wires. The thickness of the wires affects the load-bearing capacity, especially when the battery pack is used as a starting power source in automobiles.

[0003] As a starting power source, the battery draws a very high instantaneous current, so the wires need to be relatively thick to prevent overheating. Thicker wires also take up more space within the battery system enclosure. Furthermore, in automotive applications, the vibrations during driving can cause the wires to loosen, leading to poor contact, which can result in short circuits or breakage, causing electrical equipment malfunctions. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a battery power collection structure and a battery pack having the same, which solves the problems of unstable structure and poor contact caused by loose wires in battery pack systems connected by wires.

[0005] To achieve the above objectives, the technical solution of this utility model is a battery power collection structure, comprising a positive electrode power collection structure and a negative electrode power collection structure respectively electrically connected to the positive and negative electrodes of the battery. The positive electrode power collection structure and the negative electrode power collection structure are identical. The positive electrode power collection structure includes a conductive plate and a busbar. One side of the busbar is bent to form a connecting portion. The connecting portion is attached to and fixed on the conductive plate. The conductive plate is electrically connected to the positive or negative electrode post. The other side of the busbar is fixedly attached to the positive or negative electrode of the battery.

[0006] As one implementation scheme, the positive electrode power collection structure and the negative electrode power collection structure are consistent.

[0007] In one implementation, the connecting part is fixed to the conductive plate by spot welding.

[0008] In one embodiment, the connecting part is fixed to the conductive plate by rivets or screws.

[0009] As one implementation, the busbar has multiple bonding portions for fixed bonding with the positive or negative electrode of the battery, and the bonding portions have I-shaped holes formed on them.

[0010] Preferably, the contact portion is formed by an inwardly recessed surface of the busbar.

[0011] Preferably, the bonding portion is spot-welded to the positive or negative electrode of the battery.

[0012] As one implementation scheme, a short-circuit protection device is provided in the current flow direction of the positive or negative power collection structure.

[0013] As one implementation, the positive electrode power collection structure further includes a mounting plate on which a positive electrode post is mounted, and the short-circuit protection device is connected between the mounting plate and the conductive plate.

[0014] This utility model also proposes a battery pack, including the battery power connection structure described in any of the above claims.

[0015] Its advantages over existing technologies are:

[0016] This utility model's battery power acquisition connection structure consists of two parts: a positive electrode power acquisition connection structure and a negative electrode power acquisition connection structure, which are connected to the positive and negative electrodes of the battery cell, respectively. Each power acquisition connection structure includes a conductive plate and a busbar. One side of the busbar is fixedly attached to either the positive or negative electrode of the battery cell, while the other side is bent to form a connecting part. This connecting part is then fixedly attached to the conductive plate, which in turn connects to the terminal post. The busbar collects current and then transmits it to the terminal post through the conductive plate. The busbar and conductive plate act as conductors for transmitting current. The busbar and conductive plate have strong load-bearing capacity and are not easily broken or bent. Furthermore, the busbar is fixedly attached to the conductive plate through the connecting part, reducing the likelihood of poor contact and ensuring the stability of the battery operation.

[0017] This utility model also provides a battery pack in which the positive and negative terminals both adopt the above-mentioned battery power connection structure. The busbar and conductive plate will not occupy a large space in the battery system box, and the connection is more reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the positive electrode power collection structure in this utility model;

[0019] Figure 2 This is a schematic diagram of the positive electrode power collection structure from another perspective in this utility model;

[0020] Figure 3 This is a partial structural diagram of the busbar.

[0021] In the diagram, 1 is the busbar; 11 is the connector; 12 is the mating part; 121 is the protrusion; 122 is the I-shaped hole; 2 is the conductive plate; 3 is the mounting plate; 4 is the positive terminal; and 5 is the power failure protector. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Example 1

[0024] like Figure 1 and Figure 2 As shown in the figure, this embodiment proposes a battery power acquisition structure, which mainly consists of two parts: a positive electrode power acquisition connection structure and a negative electrode power acquisition connection structure (not shown in the figure). The specific structures of the positive electrode power acquisition connection structure and the negative electrode power acquisition connection structure are similar, and they are used to acquire the current of several battery cells.

[0025] The battery is composed of several cells connected in series and parallel. This power collection connection structure is used to collect power from several cells in a centralized manner.

[0026] like Figure 1 As shown, this embodiment uses a positive electrode power collection connection structure for specific illustration. This positive electrode power collection connection structure mainly consists of a conductive plate 2, a busbar 1, and a mounting plate 3. The conductive plate 2, busbar 1, and mounting plate 3 are all made of metal and are used for conductivity. One side of the busbar 1 along its length is bent to form a connecting portion 11, making the cross-sectional shape of the busbar 1 "L". The connecting portion 11 of the busbar 1 is tightly attached to the conductive plate 2 and fixed to it by spot welding. The conductive plate 2 and the busbar 1 act as conductors.

[0027] In other technical solutions, holes can be drilled in the conductive plate 2 and the busbar 1, and then the conductive plate 2 and the busbar 1 can be riveted together. Alternatively, the conductive plate 2 and the busbar 1 can be fixed together with screws.

[0028] refer to Figure 2 , Figure 3 Multiple concave bonding portions 12 are formed on the body of the busbar 1. The multiple bonding portions 12 are arranged linearly so as to bond with the positive and negative electrodes of several battery cells.

[0029] The bonding portion 12 is circular and matches the positive and negative terminals of the battery cell. Each bonding portion 12 has an I-shaped hole 122, and two protrusions 121 on each side of the I-shaped hole 122. The protrusions 121 are used to weld the bonding portion 12 to the positive or negative terminal of the battery cell during spot welding. During spot welding, the protrusions 121 melt, thereby welding the bonding portion 12 to the positive or negative terminal of the battery cell.

[0030] The I-shaped hole 122 is designed to separate the two protrusions 121, so that the current needs to bypass the separation during spot welding. When the current flows from the positive to the negative electrode of the welding electrode, the path through the surface of the mating part 12 is long, forcing most of the current to form an effective current that accumulates heat at the point of maximum contact resistance (i.e., at the protrusion 121) to form a weld. At the same time, the welding protrusion 121 faces the battery cell, and when the mating part 12 and the battery cell are under pressure, a significant and effective contact resistance is formed at the protrusion 121, avoiding the instability of contact resistance caused by the metal tension of the busbar 1. The current accumulates heat at the protrusion 121 to form a weld, which can stably and effectively weld the busbar 1 and the battery cell together.

[0031] The current from several cells is collected by the busbar 1 and then transmitted to the conductive plate 2. Finally, the current is transmitted to the terminal through the conductive plate 2.

[0032] The fitting part 12, which is recessed inward from the plate and protrudes outward on the other side, can fit perfectly with the positive and negative poles of the battery cell. The contact area with the battery cell is consistent with the cross-sectional area of ​​the battery cell. Therefore, there are fewer solder joints during welding, while ensuring good contact with the battery cell.

[0033] like Figure 1 As shown, a short-circuit protection device is also installed on the positive electrode connection structure. This short-circuit protection device is a power-off protector 5. The power-off protector 5 is installed between the mounting plate 3 of the electrode post and the conductive plate 2, and is welded and fixed to both. When a short circuit occurs, the power-off protector 5 will melt and protect the circuit and the battery.

[0034] In other technical solutions, the power interruption protector 5 can also be installed on the negative power input connection structure.

[0035] Example 2

[0036] This embodiment discloses a battery pack that employs the battery power collection connection structure described in the embodiment. The current from several battery cells is collected through a busbar 1, which is welded and fixed to a conductive plate 2. The conductive plate 2 is connected to the terminal post. The busbar 1 and conductive plate 2 replace traditional wires, resulting in higher load capacity and reducing the risk of breakage and loosening, thus ensuring the stability of the battery pack operation.

[0037] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A battery power harvesting structure, comprising a positive electrode power harvesting structure and a negative electrode power harvesting structure respectively electrically connected to the positive and negative electrodes of the battery, characterized in that, The power collection structure includes a conductive plate (2) and a busbar (1). One side of the busbar (1) is bent to form a connecting part (11). The connecting part (11) is attached to and fixed on the conductive plate (2). The conductive plate (2) is electrically connected to the positive or negative terminal. The other side of the busbar (1) is fixedly attached to the positive or negative terminal of the battery.

2. The battery power collection structure according to claim 1, characterized in that, The positive electrode power collection structure is consistent with the negative electrode power collection structure.

3. The battery power collection structure according to claim 1, characterized in that, The connecting part (11) is fixed to the conductive plate (2) by spot welding.

4. The battery power collection structure according to claim 1, characterized in that, The connecting part (11) is fixed to the conductive plate (2) by rivets or screws.

5. The battery power collection structure according to claim 1, characterized in that, The busbar (1) has a plurality of bonding portions (12) for fixing to the positive or negative electrode of the battery, and the bonding portions (12) have I-shaped holes (122).

6. The battery power collection structure according to claim 5, characterized in that, The interface of the busbar (1) is recessed inward to form the fitting portion (12).

7. A battery power collection structure according to claim 5, characterized in that, The bonding part (12) is fixed to the positive or negative electrode of the battery by spot welding.

8. The battery power collection structure according to claim 1, characterized in that, The positive or negative power collection structure is equipped with a short-circuit protection device in the direction of current flow.

9. A battery power collection structure according to claim 8, characterized in that, The positive electrode power collection structure also includes a mounting plate (3), on which a positive electrode post is mounted, and the short-circuit protection device is connected between the mounting plate (3) and the conductive plate (2).

10. A battery pack, characterized in that, Includes the battery power collection structure as described in any one of claims 1-9.

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