CN220672736U - Battery box - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery box which comprises a box bottom plate, a bridging component and a plurality of battery modules, wherein the bridging component comprises a module supporting plate connected to the box bottom plate and conductive tabs connected to the module supporting plate, the battery modules comprise a plurality of electric cores, end plates, side plates and conductive connecting pieces, the end plates and the side plates are sequentially connected end to form an accommodating space for accommodating the electric cores, and two adjacent conductive connecting pieces on different battery modules penetrate through the same conductive tab and are connected with the module supporting plate. The conductive tabs are fixedly connected to the module support plate on the bottom plate of the box body, and the conductive tabs are limited and fixed, so that the phenomenon that the conductive tabs are twisted and broken due to different amplitudes in the movement process of the battery module is avoided, and the conductive tabs with low use cost are bridged, so that the manufacturing cost of the battery box is reduced, the occupied space is less, the space occupancy is reduced, and the cost performance of the battery box is improved.

Description

Battery box

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery box.

Background

With the continuous development of new energy industry, lithium batteries are being used by various industries as energy storage units, and because of the difference of equipment arrangement spaces of different industries, when designing a battery box, industry designers divide the whole battery box into a plurality of battery module units for serial-parallel connection, and the modules are connected through conductors, so that the current of each module can be output in serial-parallel connection.

At present, three common connection modes exist between the modules, namely, the tops of different battery modules are hard-connected through conductive tabs, so that the cost is low, but as the two ends of the conductive tabs are connected to the tops of the battery modules, if the amplitudes of the modules are different in the movement process, the conductive tabs are twisted and bent, and the tabs are possibly broken when serious, so that open-circuit faults occur in the whole battery system; the second mode is to connect through soft tabs, which is high in cost, and because the soft tabs are formed by stacking a plurality of thin tabs, the soft tabs are more resistant to deflection than the hard tabs, but as the running time is prolonged, the problem of tab breakage still occurs; the third mode is to connect through power cables, the cost of the mode is common, but a certain bending radius is needed when the power cables are connected, so that the use space of the whole battery module is increased, the energy density of the battery box is reduced, and the cost performance of the whole battery box is reduced.

Disclosure of Invention

The utility model aims to provide a battery box, which reduces space occupation rate, improves cost performance of the battery box and avoids bending and breaking of conductive tabs.

To achieve the purpose, the utility model adopts the following technical scheme:

the battery box includes:

a bottom plate of the box body;

the bridging assembly comprises a conductive bar and a module supporting plate, the module supporting plate is connected to two ends of the bottom plate of the box body along the first direction, and the conductive bar is connected to the module supporting plate; the battery module comprises a plurality of battery modules, wherein the battery modules are arranged on a bottom plate of the box body along a first direction, the battery modules comprise a plurality of electric cores, end plates, side plates and conductive connecting pieces, the end plates and the side plates are sequentially connected end to form an accommodating space, the electric cores are arranged in the accommodating space along a second direction, one ends of the conductive connecting pieces are electrically connected with the electric cores, the other ends of the conductive connecting pieces penetrate through the end plates and are connected with the module supporting plate, and two adjacent conductive connecting pieces on the battery modules penetrate through the same conductive tabs and are connected with the module supporting plate.

Optionally, the battery module further includes a tab assembly, the tab assembly includes a bus bar and a pole outlet tab connected with the bus bar, the bus bar is electrically connected with the plurality of electric cells, and the pole outlet tab is connected with the conductive connecting piece.

Optionally, the tab assembly further includes a plurality of connection tabs corresponding to the battery cells, the connection tabs are welded with the poles corresponding to the battery cells, the bus tabs include bus tabs and a plurality of branch tabs connected with the bus tabs, the bus tabs are connected with the outlet tabs, and the branch tabs are connected with the connection tabs.

Optionally, a relief groove is formed in the end plate, and the pole outlet tab and the conductive connecting piece connected with the pole outlet tab are both located in the relief groove.

Optionally, the depth of the relief groove is greater than the height of the conductive connection member above the pole tab portion.

Optionally, a mounting groove is formed in the module support plate, and the conductive tab is arranged in the mounting groove.

Optionally, the module support plate is connected with the box bottom plate through bolts;

the conductive tabs are in bolted connection with the module support plates.

Optionally, the module support plate and the end plate are both insulating plates.

Optionally, the battery box further includes a battery management module, where the battery management module is disposed on the bottom plate of the box body, and the battery management module is electrically connected with the plurality of battery modules.

Optionally, a cooling flow passage for cooling medium circulation is arranged in the bottom plate of the box body.

The utility model has the beneficial effects that:

the utility model provides a battery box, wherein different battery modules are connected on the same conductive tab through conductive connecting pieces on respective adjacent end plates to realize bridging, and the conductive tab is fixedly connected on a module supporting plate on a box body bottom plate, so that the conductive tab is limited and fixed, the phenomenon that the conductive tab is twisted and broken due to different amplitude of the modules in the moving process is avoided, and the conductive tab with low cost is used for bridging different battery modules, so that the manufacturing cost of the battery box is reduced, and compared with the connection of a power cable, the space occupation is reduced, and the cost performance of the battery box is improved.

Drawings

Fig. 1 is an assembly view of a battery box of the present utility model;

fig. 2 is a schematic view of the battery case of the present utility model without the battery module mounted thereto;

fig. 3 is a layout of the tab assembly of the present utility model on a battery module.

In the figure:

1. a bottom plate of the box body;

2. a crossover assembly; 21. conductive tabs; 211. a second through hole; 212. a third through hole; 22. a module support plate; 221. installing a threaded hole; 222. a mounting groove; 2221. a threaded hole at the bottom of the tank;

3. a battery module; 31. a battery cell; 32. an end plate; 321. a first through hole; 322. a relief groove; 33. a side plate; 34. a conductive connection;

4. a wafer assembly; 41. a bus bar; 411. a confluence sheet; 412. branching pieces; 42. a pole outlet tab; 43. connecting the tabs;

5. and a battery management module.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to reduce space occupation rate, improve the cost performance of battery box, avoid electrically conductive bar bending fracture, this embodiment provides a battery box.

As shown in fig. 1 to 3, the battery box includes a box bottom plate 1, a bridging component 2 and a plurality of battery modules 3, the bridging component 2 includes a conductive tab 21 and a module support plate 22, the module support plate 22 is connected at two ends of the box bottom plate 1 along a first direction, the conductive tab 21 is connected to the module support plate 22, the plurality of battery modules 3 are arranged on the box bottom plate 1 along the first direction, the battery modules 3 include a plurality of electric cores 31, an end plate 32, a side plate 33 and a conductive connecting piece 34, the end plate 32 and the side plate 33 are sequentially connected end to form a containing space, the plurality of electric cores 31 are arranged in the containing space along a second direction, one end of the conductive connecting piece 34 is electrically connected with the plurality of electric cores 31, the other end of the conductive connecting piece 34 passes through the end plate 32 to be connected to the module support plate 22, wherein two adjacent conductive connecting pieces 34 on different battery modules 3 pass through the same conductive tab 21 to be connected to the module support plate 22.

The bridging is realized on the same conductive tab 21 through the conductive connecting piece 34 on each adjacent end plate 32 to different battery modules 3 to with conductive tab 21 fixed connection on module backup pad 22 on box bottom plate 1, thereby realize spacing and fixed to conductive tab 21, thereby avoid when battery modules 3 because of the amplitude is different in the motion process, lead to the phenomenon that conductive tab 21 twists reverse fracture to appear, and because of using low-cost conductive tab 21 to carry out the bridging to different battery modules 3, thereby reduced the manufacturing cost of battery box, and occupation space is less compared with power cable connection, reduced space occupation rate, improve the sexual valence relative altitude of battery box.

The battery box can be used for placing a plurality of battery modules 3, and two adjacent battery modules 3 are bridged by the same conductive tab 21. In this embodiment, two sets of battery modules 3 and a conductive tab 21 for bridging the two sets of battery modules 3 are disposed in the battery box, in this embodiment, two first through holes 321 corresponding to the conductive connecting pieces 34 are formed on each end plate 32, two second through holes 211 are also formed on the conductive tab 21, when the two sets of battery modules 3 are connected, the first through holes 321 on the two adjacent end plates 32 are aligned with one second through hole 211 on the conductive tab 21 respectively, and the two adjacent conductive connecting pieces 34 on the two sets of battery modules 3 sequentially pass through the first through holes 321 and the second through holes 211 to be connected with the module support plate 22, wherein the module support plate 22 is provided with mounting threaded holes 221 corresponding to the conductive connecting pieces 34 one by one, the conductive connecting pieces 34 are in threaded connection with the mounting threaded holes 221, and the conductive connecting pieces 34 are exemplified as conductive metal bolts.

Optionally, as shown in fig. 3, the battery module 3 further includes a tab assembly 4, where the tab assembly 4 includes a bus bar 41 and an outgoing electrode tab 42 connected to the bus bar 41, the bus bar 41 is electrically connected to the plurality of electrical cores 31, and the outgoing electrode tab 42 is connected to the conductive connecting member 34. The use of bus bar 41 facilitates the series connection of multiple cells 31 together.

Further, as shown in fig. 3, the tab assembly 4 further includes a plurality of connection tabs 43 corresponding to the battery cells 31, the connection tabs 43 are welded with the poles of the corresponding battery cells 31, the bus bar 41 includes a bus bar 411 and a plurality of branch tabs 412 connected with the bus bar 411, the bus bar 411 is connected with the outlet tab 42, and the branch tabs 412 are connected with the connection tabs 43. The plurality of battery cells 31 are connected in series and parallel in a branch converging mode, so that the battery cells can be overhauled and replaced conveniently when faults occur.

Optionally, as shown in fig. 3, the end plate 32 is provided with a relief groove 322, and the pole tab 42 and the conductive connecting member 34 connected to the pole tab 42 are both located in the relief groove 322. By arranging the pole outlet tabs 42 in the yielding grooves 322, the pole outlet tabs 42 are limited, and dislocation of the pole outlet tabs 42 due to movement is avoided. In the present embodiment, since two conductive connecting members 34 are disposed on each end plate 32, two yielding grooves 322 are formed on each end plate 32, wherein the first through hole 321 is formed in the yielding groove 322, and the pole tab 42 is located in one of the yielding grooves 322.

Further, the depth of the relief groove 322 is greater than the height of the portion of the conductive connector 34 above the pole tab 42. The depth of the abdication groove 322 is set to be larger than the height of the part of the conductive connecting piece 34 higher than the pole tab 42, so that the conductive connecting piece 34 cannot exceed the area of the end plate 32, the compactness of the structure is improved, and the space utilization rate is improved. In this embodiment, the size of the relief groove 322 can be adjusted according to the type of the conductive connecting piece 34, if the conductive connecting piece 34 adopts an outer hexagon bolt, the relief groove 322 should be far larger than the head of the outer hexagon bolt, so as to provide working space for screwing the wrench, if the conductive connecting piece 34 adopts an inner hexagon bolt, the relief groove 322 only needs to be slightly larger than the head of the inner hexagon bolt.

Optionally, the module support plate 22 is provided with a mounting groove 222, and the conductive tab 21 is disposed in the mounting groove 222. By installing the conductive tabs 21 in the mounting grooves 222, not only is the occupied space of the conductive tabs 21 saved, but also the conductive tabs 21 are limited and fixed, so that the conductive tabs 21 are prevented from moving. In the present embodiment, two mounting screw holes 221 are provided in the mounting groove 222.

Alternatively, as shown in fig. 2, the module support plate 22 is bolted to the case bottom plate 1. The module support plate 22 and the box bottom plate 1 are connected by using bolts, so that the module support plate 22 and the box bottom plate 1 are convenient to disassemble and assemble, and the module support plate 22 is convenient to replace at any time; the conductive tabs 21 are bolted to the module support plate 22. The conductive tabs 21 and the module support plates 22 are connected through bolts, so that the module support plates 22 and the conductive tabs 21 can be conveniently disassembled and assembled, and the conductive tabs 21 can be conveniently replaced at any time.

In this embodiment, as shown in fig. 2, a plurality of third through holes 212 are formed in the conductive tab 21, a plurality of groove bottom threaded holes 2221 corresponding to the third through holes 212 are formed in the mounting groove 222 of the module support plate 22, and the bolts are hexagon socket bolts, which pass through the third through holes 212 to be connected with the groove bottom threaded holes 2221, so as to connect the conductive tab 21 with the module support plate 22.

Optionally, the module support plate 22 and the end plate 32 are both insulating plates. An insulating plate will be used as the module support plate 22 and the end plate 32, thereby ensuring an insulating function.

Optionally, as shown in fig. 1, the battery box further includes a battery management module 5, where the battery management module 5 is disposed on the box bottom plate 1, and the battery management module 5 is electrically connected to the plurality of battery modules 3. By providing the battery management module 5, the use of the battery module 3 is better monitored and managed.

In the present embodiment, the case bottom plate 1 is divided into a functional area and a module arrangement area, the front side is the functional area, and the battery management module 5 is connected in the functional area of the case bottom plate 1, wherein a smoke alarm module, a fire protection module, and the like are also arranged in the functional area; the rear side is a module arrangement area in which the battery modules 3 are connected, and the battery management module 5 is connected with the bus bar 41 through a cable, thereby achieving electrical connection of the battery management module 5 and the battery modules 3.

Optionally, a cooling flow passage for circulating a cooling medium is provided in the bottom plate 1 of the case. Through set up the cooling runner in box bottom plate 1 for can cool off the battery module 3 in the battery box, reduce the temperature of battery module 3, avoid battery module 3 to appear thermal runaway because of high temperature as far as possible. In this embodiment, a plurality of cooling flow passages are provided in the bottom plate 1 of the case, and the cooling flow passages are wavy, thereby improving the cooling effect on the battery module 3.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The battery box, its characterized in that, the battery box includes:

a box bottom plate (1);

the bridging component (2), the bridging component (2) comprises a conductive tab (21) and a module support plate (22), the module support plate (22) is connected to two ends of the box bottom plate (1) along a first direction, and the conductive tab (21) is connected to the module support plate (22);

the battery module (3) comprises a plurality of battery cells (31), end plates (32), side plates (33) and conductive connecting pieces (34), wherein the end plates (32) and the side plates (33) are sequentially connected end to form an accommodating space, the battery cells (31) are arranged in the accommodating space along the second direction, one ends of the conductive connecting pieces (34) are electrically connected with the battery cells (31), the other ends of the conductive connecting pieces (34) penetrate through the end plates (32) to be connected with the module supporting plates (22), and two adjacent conductive connecting pieces (34) on different battery modules (3) penetrate through the same conductive tab (21) to be connected with the module supporting plates (22).

2. The battery box according to claim 1, wherein the battery module (3) further comprises a tab assembly (4), the tab assembly (4) comprises a bus bar (41) and a pole outlet tab (42) connected with the bus bar (41), the bus bar (41) is electrically connected with a plurality of the battery cells (31), and the pole outlet tab (42) is connected with the conductive connecting piece (34).

3. The battery box according to claim 2, wherein the tab assembly (4) further comprises a plurality of connection tabs (43) corresponding to the cells (31), the connection tabs (43) are welded with poles corresponding to the cells (31), the bus bar (41) comprises a bus bar (411) and a plurality of branch tabs (412) connected with the bus bar (411), the bus bar (411) is connected with the outlet tab (42), and the branch tabs (412) are connected with the connection tabs (43).

4. The battery box according to claim 2, wherein the end plate (32) is provided with a relief groove (322), and the pole outlet tab (42) and the conductive connecting piece (34) connected with the pole outlet tab (42) are both located in the relief groove (322).

5. The battery box of claim 4, wherein the relief groove (322) has a depth greater than a height of the conductive connector (34) above the tab (42) portion.

6. The battery box according to any one of claims 1-5, wherein the module support plate (22) is provided with a mounting groove (222), and the conductive tab (21) is arranged in the mounting groove (222).

7. The battery box according to any one of claims 1 to 5, characterized in that the module support plate (22) is bolted to the box floor (1);

the conductive tabs (21) are connected with the module support plates (22) through bolts.

8. The battery box according to any one of claims 1 to 5, wherein the module support plate (22) and the end plate (32) are both insulating plates.

9. The battery box according to any one of claims 1-5, further comprising a battery management module (5), wherein the battery management module (5) is provided on the box bottom plate (1), and wherein the battery management module (5) is electrically connected to a plurality of the battery modules (3).

10. The battery box according to any one of claims 1-5, characterized in that a cooling flow channel for the circulation of a cooling medium is provided in the bottom plate (1) of the box body.