CN219959151U - Battery module and energy storage power supply - Google Patents

Abstract

The utility model relates to the technical field of energy storage equipment, and discloses a battery module and an energy storage power supply, wherein the battery module comprises: the device comprises a bracket assembly, a plurality of cylindrical battery cores, a plurality of bus pieces, a circuit board and a metal sheet; the cylindrical battery cells are all installed and fixed on the bracket component; the plurality of bus pieces are all positioned at the end part of the bracket assembly, and any bus piece is electrically connected with at least two cylindrical electric cores in the plurality of cylindrical electric cores; the circuit board is arranged and fixed on the bracket assembly and is electrically connected with the plurality of bus pieces; the metal sheet comprises a first wall, the first wall is welded and fixed with any bus piece, and one end of the first wall is bent and extended towards the direction deviating from the cylindrical battery cell to form a second wall. By adopting the technical scheme, the technical problem that the temperature of the battery module is too high when the battery module is charged and discharged at a high rate can be solved.

Description

Battery module and energy storage power supply

Technical Field

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

Background

The charge-discharge multiplying power of the battery module is an important index for measuring the performance of the battery module, a plurality of cylindrical battery cells are required to be assembled in series-parallel in order to meet the use requirement of a load, however, the single body of the cylindrical battery cells is generally smaller, a honeycomb-shaped bracket is generally adopted for integrally fixing the battery module, and cooling pieces are coated on the peripheral surfaces of the plurality of cylindrical battery cells by means of natural cooling or the outer peripheral surfaces of the plurality of cylindrical battery cells.

Disclosure of Invention

In view of the above problems, embodiments of the present utility model provide a battery module and an energy storage power supply, which aim to solve the technical problem that the temperature of the battery module is too high when the battery module is charged and discharged at a high rate.

In order to improve the above technical problem, a first aspect of the present utility model provides a battery module, comprising: the device comprises a bracket assembly, a plurality of cylindrical battery cores, a plurality of bus pieces, a circuit board and a metal sheet; a plurality of cylindrical battery cells are all installed and fixed on the bracket component; the plurality of bus pieces are all positioned at the end part of the bracket assembly, and any bus piece is electrically connected with at least two cylindrical electric cores in the plurality of cylindrical electric cores; the circuit board is fixedly arranged on the bracket assembly and is electrically connected with the plurality of the bus pieces; the metal sheet comprises a first wall, the first wall is welded and fixed with any one of the bus pieces, and one end of the first wall is bent and extended towards the direction deviating from the cylindrical battery cell to form a second wall.

Optionally, the second wall is provided with a plurality of first heat dissipation holes.

Optionally, the metal sheet further includes a third wall, where the third wall is formed by bending and extending the other end of the first wall toward a direction away from the cylindrical electric core, and the third wall is disposed opposite to the second wall.

Optionally, a plurality of second heat dissipation holes are formed in the third wall.

Optionally, the number of the metal sheets is plural, and a first wall of the metal sheet is welded and fixed on one of the bus members.

Optionally, the battery module further includes an insulating cover, the insulating cover is covered on the bracket assembly, the insulating cover and the bracket assembly jointly define an installation space, and the metal sheet is accommodated in the installation space.

Optionally, the insulating cover is provided with a plurality of heat exchange holes.

Optionally, the bracket assembly comprises a first bracket and a second bracket, wherein the first bracket is provided with a plurality of first through holes, and the second bracket is provided with a plurality of second through holes;

when the first bracket is detachably connected with the second bracket, a mounting cavity is correspondingly and jointly defined by the first through hole and the second through hole, the cylindrical battery cell is accommodated in the mounting cavity, and the first bracket and the second bracket are respectively sleeved at two ends of the cylindrical battery cells.

Optionally, the busbar is one of a nickel sheet, a copper sheet and a copper-nickel sheet.

A second aspect of the present utility model provides an energy storage power supply comprising a battery module as described above.

The embodiment of the utility model has the beneficial effects that: according to the technical scheme, on one hand, the characteristic that the axial heat conductivity coefficient of the cylindrical battery cell is far greater than that of the radial heat conductivity coefficient is utilized, heat generated during charging and discharging of the cylindrical battery cell can be quickly conducted to the electric connection end of the battery cell and then conducted to the metal sheet through the confluence piece, and the metal sheet is bent, so that the contact area between the metal sheet and air is increased, and the heat dissipation efficiency of the battery module is improved. On the other hand, the metal sheet has conductivity, and the overload capacity of the confluence piece can be improved in a certain range by welding and fixing the metal sheet on the confluence piece, so that the temperature rise of the battery module is effectively reduced when the impedance fluctuation of each cylindrical cell in the battery module is large, and the operation reliability of the battery module is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic view of a structure of a battery module according to the present utility model;

fig. 2 is a structural exploded view of the battery module shown in fig. 1;

fig. 3 is a schematic view of the battery module shown in fig. 1, with an insulating cover omitted;

fig. 4 is a schematic view illustrating a structure of the battery module shown in fig. 3 without welding a metal sheet;

fig. 5 is a schematic view of a heat transfer path in the battery module shown in fig. 1.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present utility model, are within the scope of the present utility model.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In the description of the present utility model, it should be noted that, orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate or imply that the apparatus or elements being referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present utility model.

Fig. 1 is a schematic view illustrating a structure of a battery module according to the present utility model, and fig. 2 is an exploded view illustrating a structure of the battery module shown in fig. 1. First, referring to the example shown in fig. 1 and 2 together, the battery module includes: the battery module comprises a bracket assembly 10, a plurality of cylindrical battery cells 20, a plurality of bus bars 30, a circuit board 40 and a metal sheet 50; wherein the bracket assembly 10 is a mounting support structure of a plurality of cylindrical battery cells 20 and a circuit board 40; a plurality of cylindrical battery cells 20 are all installed and fixed on the bracket assembly 10; the plurality of bus bars 30 are all located at the end of the bracket assembly 10, and any bus bar 30 is electrically connected with at least two cylindrical cells 20 of the plurality of cylindrical cells 20; the circuit board 40 is mounted and fixed on the bracket assembly 10 and electrically connected to the plurality of bus bars 30. As an example, the circuit board 40 is a BMS control board; the circuit board 40 may collect the voltage and temperature of each cylindrical battery cell 20 through a voltage and temperature sensor and visually display or upload the voltage and temperature of each cylindrical battery cell 20 to an upper computer, wherein the upper computer is a computer for comprehensively managing the BMS control board and corresponding control software, and it should be noted that neither software nor computer should constitute a limitation of the present utility model.

Referring to the example shown in fig. 3, the metal sheet 50 includes a first wall 51, where the first wall 51 is welded to any bus bar 30, and one end of the first wall 51 is bent and extended in a direction away from the cylindrical battery cell 20 to form a second wall 52. Preferably, the first wall 51 and the second wall 52 of the metal sheet 50 are arranged at right angles, i.e. the metal sheet 50 is substantially L-shaped. Of course, it is understood that the first wall 51 and the second wall 52 of the metal sheet 50 are not limited to being at right angles, and may be at any angle other than right angles, so long as the requirement that the second wall 52 of the metal sheet 50 can increase the contact area with air is satisfied.

As can be seen in fig. 2, the second wall 52 is provided with a plurality of first heat dissipation holes (not shown). Illustratively, the plurality of first louvers are disposed in an array on the second wall 52, as viewed in a direction perpendicular to the second wall 52. Thereby, the contact area of the first wall 51 with the air can be further increased, thereby further improving the heat dissipation efficiency of the battery module.

With continued reference to the example shown in fig. 3, in some embodiments of the present utility model, the metal sheet 50 may further include a third wall 53, where the third wall 53 may be formed by bending the other end of the first wall 51 toward the direction away from the cylindrical cell 20, and the third wall 53 is opposite to and spaced from the second wall 52, from the viewpoint of further increasing the contact area between the metal sheet 50 and air. Preferably, the third wall 53 and the first wall 51 of the metal sheet 50 are disposed at right angles, i.e. the metal sheet 50 is substantially inverted L-shaped as shown in FIG. 3. Of course, it is understood that the first wall 51 and the third wall 53 of the metal sheet 50 are not limited to being at right angles, and may be at any angle other than right angles, so long as the requirement that the third wall 53 of the metal sheet 50 can increase the contact area with air is satisfied.

As can be seen in fig. 2, the third wall 53 is provided with a plurality of second heat dissipation holes (not shown). Illustratively, the plurality of second louvers are disposed in an array on the third wall 53, as viewed in a direction perpendicular to the third wall 53. Thereby, the contact area of the third wall 53 with the air can be further increased, thereby further improving the heat dissipation efficiency of the battery module.

In addition, referring to fig. 3 together with fig. 4, the number of the metal sheets 50 with the above structure is plural, at least two metal sheets 50 of the plural metal sheets 50 are located at one end of the bracket assembly 10, and the first wall 51 of any metal sheet 50 is welded and fixed on a bus member 30, and the bus member 30 is one of a nickel sheet, a copper sheet and a copper-nickel sheet, for example. In particular embodiments, the bus bar 30 may be a nickel sheet and the first wall 51 of the metal sheet 50 may be secured to the bus bar 30 by, but not limited to, laser welding. It should be noted here that the magnitude of the overload capability increase of the bus bar 30 is mainly determined by the size of the area of the welding region between the metal sheet 50 and the bus bar 30, and the larger the area of the welding region is, the larger the overload capability increase of the bus bar 30 is. Of course, it is understood that at least two metal sheets 50 of the plurality of metal sheets 50 may be disposed at the other end of the bracket assembly 10, and the first wall 51 of any metal sheet 50 is welded and fixed on a bus bar 30.

In some embodiments of the present utility model, the metal sheet 50 may be made of metal or an alloy. As an example, the metal sheet 50 may be aluminum or an alloy thereof, or may be formed therefrom.

For the above-mentioned bracket assembly 10, please refer to the example shown in fig. 1 again, in some embodiments of the present utility model, the bracket assembly 10 includes a first bracket 11 and a second bracket 12, the first bracket 11 is provided with a plurality of first through holes 11a, the second bracket 12 is provided with a plurality of second through holes 12a, when the first bracket 11 is detachably connected to the second bracket 12, a mounting cavity is defined by the first through holes 11a and the second through holes 12a, a cylindrical battery cell 20 is accommodated in the mounting cavity, and the first bracket 11 and the second bracket 12 are respectively sleeved at two ends of the plurality of cylindrical battery cells 20. Specifically, the first support 11 and the second support 12 are oppositely arranged, the first support 11 is provided with a buckling hole, the second support 12 is provided with a buckle, and the buckle on the second support 12 is matched and buckled with the buckling hole on the first support 11, so that the first support 11 and the second support 12 are detachably connected, and the first support 11, the second support 12 and the cylindrical battery cells 20 are completely fixed with each other.

Next, the battery module is further described in connection with the assembly process of the battery module:

firstly, arranging a plurality of cylindrical battery cells 20 in a serial-parallel arrangement mode according to the use requirement in each first through hole 11a of a first bracket 11;

then, the second bracket 12 is sleeved on each cylindrical battery cell 20 along the central axis direction of the cylindrical battery cell 20, and the second bracket 12 can be fixedly connected with the first bracket 11 through a buckle, so that a plurality of cylindrical battery cells 20 are fixed between the first bracket 11 and the second bracket 12;

then, the plurality of bus pieces 30 are respectively welded and fixed with the two ends of the cylindrical battery cells 20, which are exposed out of the first bracket 11 and the second bracket 12, so that a plurality of battery cells are connected in series and parallel to form a battery pack;

then, the circuit board 40 is positioned and installed between the first bracket 11 and the second bracket 12 and is electrically connected with the temperature sensor and the voltage sensor in the battery pack respectively; in addition, the circuit board 40 is fixedly connected with each reflow element, so that the circuit board 40 is stably installed;

finally, each of the first walls 51 of the plurality of metal sheets 50 is welded and fixed to the bus bar 30.

As can be seen from the heat conduction path diagram of the cylindrical battery cell shown in fig. 5, according to the above technical scheme, on one hand, by utilizing the characteristic that the axial thermal conductivity of the cylindrical battery cell 20 is far greater than the radial thermal conductivity, the heat generated during charging and discharging of the cylindrical battery cell 20 can be quickly conducted to the electrical connection end of the battery cell, and then conducted to the metal sheet 50 via the bus member 30, and the metal sheet 50 is bent, so that the contact area between the metal sheet 50 and the air is increased, and the heat dissipation efficiency of the battery module is improved. On the other hand, the metal sheet 50 has conductivity, and the overload capacity of the confluence piece 30 can be improved within a certain range by welding and fixing the metal sheet on the confluence piece 30, so that the temperature rise of the battery module is effectively reduced when the impedance fluctuation of each cylindrical cell 20 in the battery module is large, and the operation reliability of the battery module is improved.

Referring to the example shown in fig. 1 or 2, in order to facilitate protection of the metal sheet 50 from shorting caused by contact with other conductive members during operation of the battery module, in some embodiments of the present utility model, the battery module further includes an insulating cover 60, the insulating cover 60 is covered on the bracket assembly 10, the insulating cover 60 and the bracket assembly 10 together define an installation space, and the metal sheet 50 can be accommodated in the installation space. Specifically, the bottom of the insulating cover 60 is detachably coupled to the top of the first bracket 11, thereby defining the aforementioned installation space in common.

Further, the insulating cover 60 may be provided with a plurality of heat exchange holes 60a. Preferably, heat exchange holes 60a are arranged on each side wall of the insulating cover 60, and the positions of the plurality of heat exchange holes 60a correspond to the positions of the first heat dissipation holes 52a on the conductive member. In this way, after the heat generated during operation of the cylindrical battery cell 20 is transferred to the electrical connection end of the battery cell, the heat can be transferred to the metal sheet 50 through the nickel sheet, and then the heat accumulated on the metal sheet 50 is dissipated to the external environment through natural convection or forced air cooling.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A battery module, comprising:

a bracket assembly;

the cylindrical battery cores are all installed and fixed on the bracket component;

the plurality of bus pieces are positioned at the end part of the bracket assembly, and any bus piece is electrically connected with at least two cylindrical electric cores in the plurality of cylindrical electric cores;

the circuit board is fixedly arranged on the bracket assembly and is electrically connected with the plurality of the bus pieces; and

the metal sheet comprises a first wall, wherein the first wall is welded and fixed with any bus piece, and one end of the first wall is bent and extended towards the direction deviating from the cylindrical battery cell to form a second wall.

2. The battery module of claim 1, wherein the second wall is provided with a plurality of first heat dissipation holes.

3. The battery module according to claim 1, wherein the metal sheet further comprises a third wall formed by bending and extending the other end of the first wall in a direction away from the cylindrical cell, the third wall being disposed opposite to the second wall.

4. The battery module of claim 3, wherein the third wall is provided with a plurality of second heat dissipation holes.

5. The battery module according to claim 1, wherein the number of the metal sheets is plural, and a first wall of one of the metal sheets is welded to one of the bus bars.

6. The battery module of any one of claims 1-5, further comprising an insulating cover over the bracket assembly, the insulating cover and the bracket assembly together defining an installation space, the metal sheet being received in the installation space.

7. The battery module of claim 6, wherein the insulating cover is provided with a plurality of heat exchange holes.

8. The battery module according to any one of claims 1 to 5, wherein the holder assembly includes a first holder provided with a plurality of first through holes and a second holder provided with a plurality of second through holes;

when the first bracket is detachably connected with the second bracket, a mounting cavity is correspondingly and jointly defined by the first through hole and the second through hole, the cylindrical battery cell is accommodated in the mounting cavity, and the first bracket and the second bracket are respectively sleeved at two ends of the cylindrical battery cells.

9. The battery module according to any one of claims 1 to 5, wherein the bus member is one of a nickel plate, a copper plate, and a copper-nickel plate.

10. An energy storage power supply comprising a battery module according to any one of claims 1-9.