CN214411418U

CN214411418U - Energy storage module

Info

Publication number: CN214411418U
Application number: CN202023164311.1U
Authority: CN
Inventors: 郭燕春; 韦银涛
Original assignee: Eve Power Co Ltd
Current assignee: Eve Power Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-10-15
Anticipated expiration: 2030-12-23

Abstract

An energy storage module includes a cell fixing device, a bus bar and a plurality of cells. The cell fixing device includes a cell cover and a cell base, a plurality of positioning slots are opened in the cell base, the cell cover is arranged on the cell base, and the cell cover is provided with a plurality of fixed positions, each fixed position Correspondingly arranged toward one positioning slot; a plurality of electric cores are arranged in the electric core seat at intervals; the bus bar is electrically connected with the electrodes of each electric core. The positioning grooves in the cell holder correspond one-to-one with the fixing positions on the cell cover. The two cooperate to position the cell and leave a space for heat dissipation between the two adjacent cells to avoid damage caused by the operation of the cell. The heat accumulates in the cell holder, which improves the self-heating capacity of the energy storage module; the positioning groove and the fixed position cooperate to locate the cell, and there is no need to set additional fixing parts, which reduces the internal parts of the energy storage module and facilitates assembly and maintenance. ; No additional thermal management module is required to control the energy storage module, thereby reducing the production cost of the energy storage module.

Description

Energy storage module

Technical Field

The utility model relates to a battery especially relates to an energy storage module.

Background

Compact setting between each electric core in the energy storage module, the radiating space of power supply core proper motion is little, and electric core can give off the heat at the charge-discharge in-process, leads to the inside temperature rise of energy storage module, and the heat can reduce the charge-discharge efficiency of electric core at the inside accumulation of energy storage module, and can cause the incident of spontaneous combustion or even explosion, so need increase heat radiation structure in the energy storage module.

Generally, a water cooling device is arranged or a heat absorbing component is arranged between adjacent electric cores, wherein the water cooling device not only needs to consume module energy, but also has hidden danger of causing module short circuit when water leakage occurs; and the heat absorption part absorbs the heat of the battery core and is limited by the heat conduction performance of the heat absorption part, and the upper limit of heat absorption is low.

And install the heat absorbing component in the energy storage module, lead to module inner structure compact, the installation procedure is many, occupies more equipment man-hour to can improve the maintenance degree of difficulty of energy storage module, influence the production efficiency of energy storage module.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing one kind and being convenient for the equipment, maintain the degree of difficulty low, possess good energy storage module from heat-sinking capability.

The purpose of the utility model is realized through the following technical scheme:

an energy storage module includes: the battery cell fixing device comprises a battery cell fixing device, a busbar and a plurality of battery cells;

the battery cell fixing device comprises a battery cell cover and a battery cell seat, a plurality of positioning grooves are formed in the battery cell seat, and the battery cell cover is arranged on the battery cell seat;

the plurality of battery cells are arranged in the battery cell seat at intervals, and the bottom of each battery cell is correspondingly embedded in one positioning groove;

the bus bar is electrically connected with the electrodes of the battery cells.

In one embodiment, the battery cell cover is provided with a plurality of fixing positions, a separating rib is arranged between every two adjacent fixing positions, each fixing position is correspondingly arranged towards one positioning groove, and the top of each battery cell is buckled with one fixing position.

In one embodiment, a plurality of air holes are formed in the side wall of the electric core seat, and each air hole is communicated with the inner cavity of the electric core seat.

In one embodiment, a buckle is arranged on the battery cell cover, the buckle is arranged towards the battery cell seat, and the buckle is used for buckling with the air hole.

In one embodiment, a support rib is arranged between every two adjacent air holes and used for being abutted against the outer wall of the battery cell.

In one embodiment, the number of the support ribs between two adjacent air holes is 2.

In one embodiment, each fixing position is provided with a through hole, and the electrode of the battery cell penetrates through the through hole to be electrically connected with the bus bar.

In one embodiment, the energy storage module further comprises an insulating sheet, and the insulating sheet is arranged on the cell cover.

In one embodiment, a limiting frame is arranged on the battery cell cover, the busbar is accommodated in the limiting frame, and the insulating sheet is covered on the limiting frame.

In one embodiment, the electric core seat is a plastic base, and a flange is arranged on the end face of the electric core seat and provided with a nut.

Compared with the prior art, the utility model discloses at least, following advantage has:

1. the positioning grooves in the battery cell seat correspond to the fixing positions on the battery cell cover one by one, the positioning grooves and the fixing positions are matched to position the battery cells, a heat dissipation space is reserved between every two adjacent battery cells, heat generated by the operation of the battery cells is prevented from being accumulated in the battery cell seat, and the self-heat dissipation capacity of the energy storage module is improved;

2. the positioning groove is matched with the fixing position to position the battery cell, and no fixing component is required to be additionally arranged, so that internal parts of the energy storage module are reduced, and the assembly and maintenance are convenient;

3. the energy storage module is controlled without additionally arranging a heat management module, so that the manufacturing cost of the energy storage module is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded view of an energy storage module according to an embodiment of the present invention;

fig. 2 is a side view of an energy storage module according to an embodiment of the present invention.

Reference numerals:

an energy storage module 10; the battery cell fixing device 100, the busbar 200, the battery cell 300, the insulating sheet 400, the heat dissipation space 11, the battery cell cover 110, the battery cell holder 120, the fixing position 111, the through hole 111a, the buckle 112, the limiting frame 113, the positioning bump 113a, the positioning groove 121, the air vent 122, the support rib 123, the flange 124, the nut 125, the terminal 210, the sub-busbar 220, the transition part 221, the power connection part 222, the contact protrusion 222a, the groove 223, the positive electrode 310, and the negative electrode 320

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an energy storage module 10 includes: cell fixing device 100, busbar 200, and a plurality of battery cells 300. The battery cells 300 are accommodated in the battery cell fixing device 100, and a sufficient gap is maintained between the battery cells 300 for heat dissipation, so that the air permeability of the battery cell fixing device 100 is improved, and the heat dissipation capability of the energy storage module 10 is improved.

The battery cell fixing device 100 includes a battery cell cover 110 and a battery cell holder 120, a plurality of positioning slots 121 are formed in the battery cell holder 120, and the battery cell cover 110 is covered on the battery cell holder 120; a plurality of electric cores 300 are arranged in the electric core holder 120 at intervals, the bottom of each electric core 300 is correspondingly embedded in one positioning groove 121, the electric core 300 is fixed in an inner cavity surrounded by the electric core holder 120 and the electric core cover 110, and no connecting part needs to be additionally installed.

In one embodiment, the battery cover 110 is provided with a plurality of fixing positions 111, each fixing position 111 is correspondingly disposed toward one positioning slot 121, and the top of each battery 300 is fastened with one fixing position 111; a fixed position 111 and a constant head tank 121 cooperate to constitute electric core location structure promptly, and fixed position 111 and constant head tank 121 cooperate and fix the both ends of electric core 300, make the fixed more firm reliable of electric core.

Referring to fig. 1 and fig. 2, since the fixing portion 111 and the positioning groove 121 cooperate to fix two ends of the battery cell 300, no connecting component is required to be installed between the battery cells 300 and the battery cells 300, so that a space exists between two adjacent battery cells 300, the space is the heat dissipation space 11, and when the air passes through the heat dissipation space 11, the air takes away heat generated by the operation of the battery cell 300, so that the heat is not directly transferred to the battery cell 300 adjacent to the air, thereby preventing the heat from being transferred between the battery cells 300, preventing the heat from being accumulated in the battery cell holder 120, and improving the self-heat dissipation capability of the energy storage module 10, so that a special heat management device is not required to be additionally arranged inside the battery cell holder 120.

The bus bar 200 is electrically connected to electrodes of the battery cells 300, the bus bar 200 is used to electrically connect the battery cells 300 in the battery cell holder 120, and the battery cells 300 may be selected to be connected in series or in parallel according to actual use requirements.

When the energy storage module 10 is assembled, the battery cells 300 are firstly coded into the battery holder 120 one by one, and when the battery cells 300 are placed, the bottoms of the battery cells 300 are embedded into the positioning grooves 121, and the battery cells 300 are preliminarily positioned by the positioning grooves 121;

after all the battery cells 300 are coded into the battery cell holder 120, the battery cell cover 110 is covered on the battery cell holder 120, so that the fixing positions 111 are correspondingly buckled with the tops of the battery cells 300 one by one, and thus the battery cell cover 110 and the battery cell holder 120 finish fixing the two ends of the battery cells 300;

the bus bar 200 is then mounted on the core cover 110, and the electrodes of the respective battery cells 300 are connected to the bus bar 200, at which time the respective battery cells 300 in the battery cell holders 120 are electrically connected by the bus bar 200.

Because no additional connecting part needs to be assembled in the process of setting the battery cell 300, and no thermal management device needs to be installed in the battery cell holder 120, the related installation steps are saved, the assembly efficiency of the energy storage module 10 is improved, the number of internal parts of the battery cell holder 120 is small, and the maintenance difficulty is lower than that of the existing energy storage module.

Referring to fig. 1 again, in an embodiment, a separating rib is disposed between every two adjacent fixing locations 111, and the separating rib cooperates with the fixing locations 111 to separate two adjacent battery cells 300, so as to prevent the battery cells 300 from deviating, thereby ensuring stability of the installation positions of the battery cells 300.

In an embodiment, a plurality of air holes 122 are formed on the sidewall of the battery cell holder 120, and each air hole 122 is communicated with the inner cavity of the battery cell holder 120. Through bleeder vent 122 intercommunication electricity core seat 120 and outside for energy storage module 10 is more ventilated, and the heat that electric core 300 gived off is taken away to the air that is convenient for to flow, further improves energy storage module 10's heat-sinking capability.

In order to improve the self-heat dissipation capability of the energy storage module 10, the battery cell holder 120 is a plastic base, a flange 124 is disposed on an end surface of the battery cell holder 120, and a nut 125 is disposed on the flange 124.

In one embodiment, the electrical core cover 110 is provided with a buckle 112, the buckle 112 is disposed toward the electrical core base 120, and the buckle 112 is configured to be buckled with the air hole 122.

In an embodiment, all be provided with brace 123 between every two adjacent bleeder vents 122, brace 123 is used for with the outer wall butt of electric core 300, fixes a position electric core 300 through brace 123 supplementary electric core lid 110 of the outer wall application of force of electric core 300 and electric core seat 120, prevents to assemble or maintain that energy storage module in-process electric core 300 takes place the skew to also the size is in the clearance between the outer wall of electric core 300 and the inside wall of electric core seat 120, further improves the radiating effect.

In one embodiment, the number of the support ribs 123 between two adjacent vent holes 122 is 2. The two support ribs 123 are respectively abutted against the outer walls of the two adjacent battery cells 300.

Further, referring to fig. 1, the air holes 122 penetrate through the electrical core print 120, and two convection ports 21 are formed on two opposite sides of the electrical core print 120, so as to form convection, thereby improving the air permeability of the electrical core print 120 and facilitating heat dissipation.

It should be noted that the dashed lines in fig. 1 are only used for guidance, in order to indicate two of the corresponding convection ports 21.

The cross section of the convection port 21 is rectangular, and the convection port 21 extends from the bottom of the electric core holder 120 to the top of the electric core holder 120, so that the aperture of the convection port 21 is increased, and the air permeability of the electric core holder is further increased. For example, the length of the convection opening 21 is 70% to 90% of the thickness of the die holder 120.

The air holes 122 are arranged towards the interval between two adjacent positioning grooves 121, so that the air holes 122 are arranged towards the heat dissipation space 11 between the battery cells 300 fixed in the two positioning grooves 121, and heat in the heat dissipation space 11 is directly dissipated to the outside through the two convection ports 21;

the aperture of the air hole 122 is larger than the distance between two adjacent positioning grooves 121, that is, the aperture of the air hole 122 is larger than the width of the heat dissipation space 11, so that the battery cell 300 fixed in the two positioning grooves 121 is partially exposed in the coverage of the air hole 122, as shown in fig. 2, when air circulates, the air can directly contact with the outer walls of the two battery cells 300, and the heat generated in the operation process of the battery cell 300 is prevented from being accumulated in the battery cell holder 120, so that the heat dissipation performance of the energy storage module 10 is improved.

In an embodiment, each fixing portion 111 is formed with a through hole 111a, and an electrode on the battery cell 300 passes through the through hole 111a to be electrically connected to the bus bar 200.

In one embodiment, the energy storage module 10 further includes an insulation sheet 400, and the insulation sheet 400 is disposed on the core cover 110.

In one embodiment, the core cover 110 is provided with a limiting frame 113, the bus bar 200 is accommodated in the limiting frame 113, and the insulating sheet 400 is covered on the limiting frame 113.

1. the positioning grooves 121 in the battery cell holder 120 correspond to the fixing positions 111 on the battery cell cover 110 one by one, and the positioning grooves 121 and the fixing positions are matched to position the battery cells 300, so that a heat dissipation space 11 is reserved between two adjacent battery cells 300, heat generated by the operation of the battery cells 300 is prevented from being accumulated in the battery cell holder 120, and the self-heat dissipation capability of the energy storage module is improved;

2. the positioning groove 121 is matched with the fixing position 111 to position the battery cell 300, no additional fixing component is needed, internal parts of the energy storage module are reduced, and assembly and maintenance are facilitated;

The positive electrode 310 and the negative electrode 320 of the battery cell 300 are located on the same side, and the positive electrode 310 and the negative electrode 320 of the same battery cell 300 are both electrically connected to the bus bar 200 through the through hole 111 a. The battery cells 300 are grouped into two groups, the battery cells 300 in the same group are connected in parallel to form a parallel group, and a plurality of parallel groups are connected in series;

referring to fig. 1, in order to facilitate electrical connection of the cells 300 in the cell holder 120, the busbar 200 includes two terminals 210 and a plurality of sub-bus bars 220, the two terminals 210 are respectively disposed on two parallel groups located at two ends of the cell holder 120, and the terminals 210 are used for electrical connection with the outside;

specifically, the transition portion 222 is provided with a plurality of contact protrusions 222a, the number of the contact protrusions 222a is equal to the number of the battery cells 300 in the parallel group, each contact protrusion 222a is correspondingly electrically connected to an electrode on one battery cell 300, for example, if the number of the battery cells 300 in the parallel group is 2, the number of the contact protrusions 222a on the transition portion 222 is also 2, and 2 contact protrusions 222a on the same transition portion 222 are respectively electrically connected to the positive electrodes 310 (or the negative electrodes 320) of 2 battery cells 300, so as to connect the positive electrodes 310 (or the negative electrodes 320) of 2 battery cells 300 in parallel;

the two transition portions 222 on the sub bus bar 220 connect the positive electrodes and the negative electrodes of the two adjacent parallel groups respectively to connect the two adjacent parallel groups in series, so that the cells 300 in the cell holder 120 are connected in parallel and then connected in series by arranging the bus bar 200.

The positive electrode 310 and the negative electrode 320 of the battery cell 300 are arranged on the same side, the battery cell 300 does not need to be turned over in the process of arranging the sub bus bar 220, the limiting frame 113 is arranged on the battery cell cover 110, the sub bus bar 220 is positioned through the limiting frame 113, and after the sub bus bar 220 is arranged in the limiting frame 113, each contact protrusion 222a on the sub bus bar 220 is in contact with the positive electrode 310 (or the negative electrode 320) penetrating through the through hole 111 a.

Be provided with a plurality of location lugs 113a on spacing frame 113's the inboard, and all be provided with on the outer wall of each sub bus bar piece 220 with location lug 113a assorted recess 223, cooperate the sub bus bar piece 220 location through location lug 113a and recess 223, do not need operating personnel naked eye to counterpoint to in adopt the manipulator to realize the automatic equipment of sub bus bar piece 220, be favorable to improving the holistic packaging efficiency of energy storage module 10.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An energy storage module, comprising:

the battery cores are arranged in the battery core seat at intervals, and the bottom of each battery core is correspondingly embedded in one positioning groove;

and the bus bar is electrically connected with the electrodes of the battery cells.

2. The energy storage module of claim 1, wherein a plurality of fixing locations are disposed on the cell cover, a separating rib is disposed between every two adjacent fixing locations, each fixing location is correspondingly disposed toward one positioning slot, and a top of each cell is fastened to one fixing location.

3. The energy storage module as claimed in claim 1, wherein a plurality of air holes are formed in the side wall of the electrical core holder, and each air hole is communicated with the inner cavity of the electrical core holder.

4. The energy storage module of claim 3, wherein a buckle is disposed on the cell cover, the buckle is disposed toward the cell holder, and the buckle is configured to be fastened with the vent hole.

5. The energy storage module of claim 3, wherein a support rib is arranged between every two adjacent air holes, and the support rib is used for abutting against the outer wall of the battery cell.

6. The energy storage module of claim 5, wherein the number of the support ribs between two adjacent air holes is 2.

7. The energy storage module of claim 2, wherein each of the fixing portions has a through hole, and an electrode of the battery cell passes through the through hole and is electrically connected to the bus bar.

8. The energy storage module of claim 1, further comprising an insulating sheet disposed on the cell cover.

9. The energy storage module of claim 8, wherein a limit frame is disposed on the cell cover, the busbar is accommodated in the limit frame, and the insulating sheet covers the limit frame.

10. The energy storage module of claim 1, wherein the electrical core holder is a plastic base, and a flange is disposed on an end surface of the electrical core holder, and a nut is disposed on the flange.