CN220628142U - Battery cell confluence sheet and energy storage power supply - Google Patents

Abstract

The utility model relates to the technical field of energy storage equipment, and discloses a battery cell busbar and an energy storage power supply. The bonding pad unit of the battery cell busbar provided by the utility model is provided with at least two side edges connected with the guide plates, so that the sectional area of electric conduction is doubled, the resistance of electric conduction is reduced, the heating value is reduced, the overcurrent capacity is improved, the short circuit risk caused by overheat inside the battery cell is avoided, and the use safety of the energy storage power supply is improved.

Description

Battery cell confluence sheet and energy storage power supply

Technical Field

The utility model relates to the technical field of energy storage equipment, in particular to a battery cell busbar and an energy storage power supply.

Background

In the practical application scene of the outdoor mobile power supply, the capacity of the battery core and the charge and discharge multiplying power of the battery core are larger and larger, the overcurrent requirement is stricter and stricter, and under the extreme working condition, the serious heating caused by insufficient overcurrent capacity of the bus bar can cause the risk of internal short circuit of the battery core.

Therefore, a battery cell bus bar and an energy storage power supply are needed to solve the above technical problems.

Disclosure of Invention

Based on the above, the utility model aims to provide the electric core confluence sheet and the energy storage power supply, which can increase the sectional area of electric conduction in multiple times, reduce the resistance of electric conduction, reduce the heating value and improve the overcurrent capacity.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in one aspect, a battery cell busbar is provided, the battery cell busbar comprises a guide plate and at least two pad units, the pad units are distributed on the guide plate at intervals, the pad units are used for electrically connecting a battery cell, the guide plate is used for electrically connecting the pad units and external elements, and at least two side edges of the pad units are connected with the guide plate.

Specifically, the cell is electrically connected to the cell through the bonding pad unit, and since the at least two sides of the bonding pad unit are connected with the guide plates, compared with the mode that only one side is connected with the guide plates, the sectional area of electric conduction is doubled, the resistance of electric conduction is reduced, the heating value is reduced, the overcurrent capacity is improved, the short circuit risk caused by overheat inside the cell is avoided, and the safety is improved.

As an optional technical scheme of the battery cell busbar, two opposite side edges on the bonding pad unit are connected with the guide plate.

As an optional technical scheme of the battery cell busbar, the bonding pad unit comprises a bonding pad part and two connecting parts, one ends of the two connecting parts are connected with the guide plate, and the other ends of the two connecting parts are bent towards one side close to the battery cell and are respectively connected with two opposite side edges of the bonding pad part.

As an optional technical scheme of the battery cell busbar, the bonding pad unit is in welded connection with the electrode of the battery cell, a first strip-shaped bonding hole and a second strip-shaped bonding hole are formed in the bonding pad unit, and the first bonding hole and the second bonding hole are used for filling welding seams for connecting the electrode.

As an optional technical solution of the electrical core busbar, the first welding hole is perpendicular to the second welding hole.

As an optional technical solution of the electrical core busbar, the first welding hole and the second welding hole respectively penetrate through the pad unit in a horizontal direction.

As an optional technical scheme of the cell busbar, the pad unit is integrally formed with the deflector by stamping.

As an alternative technical scheme of the battery cell busbar, the battery cell busbar is made of metallic nickel.

As an optional technical scheme of the battery cell busbar, the battery cell busbar comprises four welding disc units, and the four welding disc units are distributed on the guide plate in a staggered mode.

In another aspect, an energy storage power supply is provided, and the energy storage power supply comprises a plurality of electric cores and the electric core bus plate, wherein the electric core bus plate is electrically connected with electrodes of the electric cores.

The beneficial effects of the utility model are as follows:

according to the battery cell busbar provided by the utility model, the battery cells are electrically connected through the bonding pad units, and as at least two side edges of the bonding pad units are connected with the guide plates, compared with a mode of only connecting the guide plates on one side, the sectional area of electric conduction is increased exponentially, the resistance of electric conduction is reduced, the heating value is reduced, the overcurrent capacity is improved, the short circuit risk caused by overheat inside the battery cells is avoided, and the safety is improved.

The energy storage power supply provided by the utility model is electrically connected with the electrodes of a plurality of electric cores through the electric core confluence sheet so as to realize charge and discharge, the electric core confluence sheet bonding pad unit is provided with at least two side edges connected with the guide plates, the sectional area of electric conduction is increased by times, the electric conduction resistance is reduced, the heating value is reduced, the overcurrent capacity is improved, the short circuit risk caused by overheat inside the electric core is avoided, and the use safety of the energy storage power supply is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of an energy storage power supply according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a battery cell busbar according to an embodiment of the present utility model.

In the figure:

100. a cell busbar; 200. a cell assembly; 300. a first positive and negative nickel plate; 400. a second positive and negative nickel plate;

10. a deflector; 20. a pad unit; 1. a pad portion; 2. a connection part; 3. a first solder hole; 4. and a second solder hole.

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.

As shown in fig. 1 and 2, the present embodiment provides an energy storage power supply, specifically an outdoor mobile power supply, where the energy storage power supply includes a battery cell busbar 100 and a battery cell assembly 200, and the battery cell assembly 200 includes a plurality of battery cells, and the battery cell busbar 100 is electrically connected with electrodes of the plurality of battery cells.

Further, as shown in fig. 2, the cell busbar 100 includes a guide plate 10 and at least two pad units 20, the pad units 20 are distributed on the guide plate 10 at intervals, the pad units 20 are used for electrically connecting the cells, the guide plate 10 is used for electrically connecting the pad units 20 and external elements, and at least two sides of the pad units 20 are connected with the guide plate 10.

Specifically, the energy storage power supply provided in this embodiment is electrically connected with the electrodes of a plurality of electric cells through the electric core busbar 100 to realize charge and discharge, the electric core is electrically connected through the pad unit 20 by the electric core busbar 100, and since the at least two sides of the pad unit 20 are connected with the guide plate 10, compared with the mode of only connecting the guide plate 10 on one side, the sectional area of electric conduction is increased by times, the resistance of electric conduction is reduced, the heat productivity is reduced, the overcurrent capacity is improved, the short circuit risk caused by overheat inside the electric core is avoided, and the use safety of the energy storage power supply is improved.

As shown in fig. 2, the pad unit 20 is in a square structure, two opposite sides of the pad unit 20 are connected with the deflector 10, and the other two sides are suspended to form an axisymmetric structure, so that on one hand, the inflow or outflow current of the battery core has two paths which are identical and opposite in direction, and the distribution of heat productivity is more uniform; on the other hand, the bonding pad unit 20 is welded with the electrode of the battery core, and welding stress can be transferred through two symmetrical side edges, so that the structural strength is improved.

As shown in fig. 2, the pad unit 20 includes a pad part 1 and two connection parts 2, one ends of the two connection parts 2 are connected to the deflector 10, and the other ends of the two connection parts 2 are bent toward a side close to the battery cell and are respectively connected to opposite sides of the pad part 1. The bonding pad part 1 is connected through the two bent connecting parts 2 to form a convex hull structure facing the battery core, and the connecting parts 2 have certain elasticity, are favorable for the transmission of structural stress and welding stress, and improve the structural strength.

In other embodiments, the pad unit 20 may be connected to the deflector 10 through three or four sides to further enhance the overcurrent capability.

Illustratively, the pad unit 20 is welded to the electrode of the battery cell, and as shown in fig. 2, the pad unit 20 is provided with a first elongated solder hole 3 and a second elongated solder hole 4, and the first solder hole 3 and the second solder hole 4 are used for filling the solder joint connecting the electrode. On the one hand, the strip-shaped welding holes can increase the welding area and improve the connection strength between the welding pad unit 20 and the battery core; on the other hand, the two strip welding holes are more beneficial to absorbing welding stress and structural stress.

Illustratively, as shown in fig. 2, the first solder apertures 3 are perpendicular to the second solder apertures 4 to form a cross-aperture structure, which arrangement enables further optimization of the ability to absorb solder stresses and structural stresses.

Illustratively, the first and second solder holes 3 and 4 respectively penetrate the pad unit 20 in the horizontal direction. Specifically, the first solder hole 3 penetrates the pad portion 1 and the two connection portions 2, and the second solder hole 4 penetrates the pad portion 1 from another direction, and this arrangement makes the pad unit 20 form four mutually independent connection units to form four relatively independent current paths, so that the current distribution is more uniform, the stress is more dispersed, and the reliability is higher.

Illustratively, the pad unit 20 is integrally formed to the baffle 10 by punching, and the first and second solder holes 3 and 4 are manufactured by punching.

Illustratively, the cell buss plate 100 is made of metallic nickel.

As shown in fig. 1 and fig. 2, the cell busbar 100 includes four pad units 20, and the four pad units 20 are distributed in the deflector 10 in a staggered manner, so as to increase the space between adjacent pad units 20, make the heat generated more uniformly spread out, and adapt to the cells arranged in staggered rows and columns, thereby improving the compactness of the structure.

As shown in fig. 1, the energy storage power source includes a plurality of cell bus plates 100, wherein adjacent cell bus plates 100 are electrically connected, and a part of the cell bus plates 100 are electrically connected to a first positive and negative nickel plate 300, the first positive and negative nickel plate 300 is connected to a negative electrode interface of the energy storage power source, and another part of the cell bus plates 100 are electrically connected to a second positive and negative nickel plate 400, and the second positive and negative nickel plate 400 is connected to a positive electrode interface of the energy storage power source.

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 (10)

1. The battery cell confluence sheet is characterized by comprising a guide plate and at least two bonding pad units, wherein the bonding pad units are distributed on the guide plate at intervals, the bonding pad units are used for electrically connecting a battery cell, the guide plate is used for electrically connecting the bonding pad units and external elements, and at least two side edges of the bonding pad units are connected with the guide plate.

2. The die attach pad of claim 1, wherein two opposing sides of the pad unit are connected to the deflector.

3. The cell busbar according to claim 2, wherein the pad unit includes a pad portion and two connection portions, one ends of the two connection portions are connected to the deflector, and the other ends of the two connection portions are bent toward a side close to the cell and are respectively connected to two opposite sides of the pad portion.

4. The cell busbar of claim 1, wherein the pad unit is in welded connection with an electrode of the cell, and the pad unit is provided with a first elongated solder hole and a second elongated solder hole, and the first solder hole and the second solder hole are used for filling a solder joint connecting the electrode.

5. The die buss plate of claim 4, wherein the first solder apertures are perpendicular to the second solder apertures.

6. The die attach pad of claim 5, wherein the first and second solder apertures each extend through the pad unit in a horizontal direction.

7. The die attach pad of any of claims 1-6, wherein the pad unit is integrally formed to the baffle by stamping.

8. The cell buss sheet of any of claims 1-6, wherein the cell buss sheet is made of metallic nickel.

9. The die attach sheet of any of claims 1-6, wherein the die attach sheet comprises four of the pad units, the four of the pad units being offset from the baffle.

10. An energy storage power supply, characterized by comprising a plurality of cells and a cell busbar according to any of claims 1-9, said cell busbar being electrically connected to the electrodes of a plurality of said cells.