CN219017835U - Battery module and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery module and a battery pack, wherein the battery module comprises a battery module, the battery module comprises two groups of electric cores (1), each group of electric cores (1) comprises a plurality of electric cores (1) which are sequentially stacked and aligned along a first direction, the electric cores (1) of the two groups are aligned along a second direction which is transversely perpendicular to the first direction, and the plug wire ends of the electric cores (1) of the two groups are arranged back to each other in the second direction. Through above-mentioned technical scheme, battery module structure passes through the electric core side mode of putting, sets up electric core wiring end position at the module side to through electric core back-to-back group, make high pressure connection connect at module both sides face, improved the space utilization of battery package direction of height greatly like this.

Description

Battery module and battery pack

Technical Field

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

Background

The battery pack is generally designed in a standard box form for an electric heavy-duty card. The standard box body adopts panel beating or aluminium extrusion section design, and the inside design of box has a plurality of mounting point for fixed module. PTC heating plate is installed to module bottom or side, can guarantee that the battery package normally works under low temperature. The front panel of the battery box is provided with a high-voltage output interface and a low-voltage signal acquisition interface, so that the charge and discharge functions of the battery pack and the signal communication with the whole vehicle are realized.

At present, a battery module in an electric heavy-duty battery pack is designed as a module, but the module is not compact enough in design, and the grouping efficiency and the volume utilization rate are not high, so that the number of battery cores in the module and the power performance of the module can be greatly limited in a limited space, the energy efficiency of the battery pack can be limited, and the safety and the cruising mileage of an electric automobile are influenced. It is therefore an important task of designing a battery system to arrange as many cells as possible in a limited space.

Disclosure of Invention

The utility model aims to solve the problems of low grouping efficiency and low volume utilization rate in the prior art, and provides a battery module, wherein two groups of cells of the battery module are placed back to back, so that the space utilization rate of a battery pack is improved.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a battery module including two groups of battery cells, each group of battery cells including a plurality of battery cells arranged in a stacked alignment in sequence along a first direction, the battery cells of the two groups being arranged and aligned along a second direction perpendicular to the first direction, and the battery cells of the two groups being arranged with their battery terminals facing away from each other in the second direction.

Optionally, foam is arranged between any two of the battery cells in each group of the battery cells.

Optionally, the thickness of the foam is 1-3mm.

Optionally, the battery module further comprises a heat insulation plate disposed between two groups of the electric cells.

Optionally, both sides of the heat insulation plate and the foam are provided with viscose.

Optionally, the battery module further comprises end plates disposed at both ends of the battery module in the first direction, and the dimension of the end plates in a third direction perpendicular to the first direction and the second direction is the same as the dimension of the battery cells in the third direction.

Optionally, an insulating plate is further included that is disposed between the end plate and the battery module.

Optionally, the battery module further comprises a binding band sleeved on the outer peripheral surfaces of the battery module and the end plates positioned on two sides.

Optionally, the battery module further comprises protective covers arranged at two ends of the battery module in the second direction, the protective covers are provided with concave parts, and the concave parts face the terminals of the battery cells.

The second aspect of the utility model provides a battery pack, which comprises a battery pack shell and the battery module set on the battery pack shell.

Through above-mentioned technical scheme, battery module structure passes through the electric core side mode of putting, sets up electric core wiring end position at the module side to through electric core back-to-back group, make high pressure connection connect at module both sides face, improved the space utilization of battery package direction of height greatly like this.

Drawings

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

Description of the reference numerals

1-cell, 2-end plate, 3-foam, 4-insulating plate, 5-binding band, 6-protective cover and 7-insulating plate.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

The utility model discloses a battery module, which comprises a battery module, wherein the battery module comprises two groups of electric cores 1, each group of electric cores 1 comprises a plurality of electric cores 1 which are sequentially stacked and aligned along a first direction, the electric cores 1 of the two groups are aligned along a second direction which is transversely perpendicular to the first direction, and the plug terminals of the electric cores 1 of the two groups are arranged back to each other in the second direction.

As shown in fig. 1, the battery cell 1 adopts a square shell battery cell, the square shell can more effectively utilize space, the extending direction of the long side of the surface of the battery cell 1 where the terminal is located is the length direction of the battery cell 1, the extending direction of the short side of the surface of the terminal is the thickness direction of the battery cell 1, and the direction perpendicular to the surface of the terminal is the height direction of the battery cell 1. The thickness direction of the battery cell 1 is a first direction, the height direction of the battery cell 1 is a second direction, the length direction of the battery cell 1 is a third direction, a battery module formed by a plurality of battery cells 1 is also square, the length of the battery module extends along the first direction, the width extends along the second direction, and the height extends along the third direction; the battery module structure is arranged on the side of the module through the side of the battery cell 1, so that the battery cell terminals are arranged towards the second direction, the terminals of the two groups of battery cells 1 are oppositely arranged, and the battery cells 1 are arranged back to form groups, so that high-voltage connection is performed on the two side surfaces of the module, and the space utilization rate of the height direction of the battery pack is greatly improved.

Further, foam 3 is arranged between any two cells 1 in each group of cells 1.

As shown in fig. 1, the battery cells 1 will expand during the charge and discharge processes, and a gap needs to be reserved between the battery cells 1 to avoid the danger after the battery cells 1 expand; the gap is provided with foam 3, and the foam includes Polyurethane (PU) foam, antistatic foam, conductive foam etc. and is selected for use in this application, PU foam price is lower and the quality is stable, and foam 3 can absorb the expansion of electric core 1 charge-discharge in-process, makes the module size maintain in certain within range, increases the security.

As an embodiment, the thickness of the foam 3 is 1-3mm, preferably the thickness of the foam 3 is 2mm.

As shown in FIG. 1, the gaps between the adjacent cells 1 are not suitable to be too large or too small, the space is wasted due to the too large gaps, and dangers can occur due to the too small gaps when the cells 1 expand, so that the gaps between the adjacent cells 1 are 1-3mm, the gaps between the adjacent cells 1 are set to be 2mm in the application, the thickness of the foam 3 is consistent with the gaps, and the thickness of the foam 3 is set to be 2mm.

Further, the battery module further comprises a heat insulating plate 7 arranged between the two sets of cells 1.

As shown in fig. 1, the ends of the two groups of electric cores 1 far away from the terminal are attached to each other, so that when the electric cores 1 are prevented from thermal runaway, heat cannot be transferred to the adjacent electric cores, and the heat insulation plate 7 has the main function of insulating heat transfer between the electric cores 1, so that the overall safety is improved; the heat insulating plate 7 can be made of heat insulating materials such as glass fiber, asbestos, mica and the like, and mica sheets are selected as the heat insulating plate 7 in the application.

Wherein, both sides of the heat insulation plate 7 and the foam 3 are provided with viscose.

As shown in fig. 1, in order to ensure that after the battery modules are grouped, the battery cells 1 cannot deviate and move, and the battery cells 1, the foam 3 and the heat insulation plate 7 are bonded through double-sided adhesive tapes or heat conduction structural adhesive, so that after the battery cells are grouped, the battery cells cannot bend, twist, deviate and the like, and the stability of the battery modules is improved.

Further, the battery module further includes end plates 2 disposed at both ends in the first direction of the battery module, and the dimension of the end plates 2 in the third direction perpendicular to the first direction and the second direction is the same as the dimension of the battery cells 1 in the third direction.

As shown in fig. 1, the battery cells 1 can be limited by the end plates 2 on two sides, and a certain pretightening force is applied to the battery cells 1, so that the whole battery module is compact and firm, the width of the end plate 2 is the same as that of the battery cells 1, two ends of the end plate 2 can be aligned respectively, and the end plate is convenient to fix, and as a preferred implementation mode, the size of the end plate 2 is the same as that of two battery cells 1 spliced along the second direction; the end plate 2 is the metal sheet, adopts aluminium extrusion profile design in this application, can enough guarantee the intensity demand of end plate 2, can also lighten weight simultaneously.

As one embodiment, the battery module further includes an insulating plate 4 disposed between the end plate 2 and the battery module.

As shown in fig. 1, an insulating plate 4 is arranged between the end plate 2 and the adjacent battery cell 1, so that the electrical insulation performance of the module can be ensured, and the danger of electric shock and the like caused by conducting electricity through the end plate 2 after the battery cell 1 is damaged is prevented; insulating board 4 can adopt insulating material such as rubber, glass fiber, electroceramics, and insulating board 4 set up to the epoxy board in this application, and the epoxy board is not only insulating effectual, and adhesion is strong, contractility is strong simultaneously, can increase the adhesion between end plate 2 and the electric core 1.

Further, the battery module further includes a strap 5 that is fitted over the outer circumferential surfaces of the battery module and the end plates 2 on both sides.

As shown in fig. 1, the binding band is made of stainless steel, and is a square ring, and the inner circumferential surface of the binding band is matched with the outer circumferential surface of the battery cell 1 and the end plate 2 after being grouped, so that the binding band 5 can be just sleeved on the outer circumferential surface of the module after being grouped by the battery cell 1 and the end plate 2, the battery cell 1 and the end plate 2 can be bound together, and a certain pretightening force is given to the module, so that the structure is firm and reliable.

As an embodiment, the battery module further comprises protective covers 6 arranged at two ends of the battery module in the second direction, and concave parts are arranged on the protective covers 6 and face the terminals of the battery cells 1.

As shown in fig. 1, the protecting cover 6 mainly covers and protects the wiring terminal of the module, the concave part on the protecting cover 6 avoids the wiring terminal of the battery cell 1, so that the interference problem between the protecting cover 6 and the wiring terminal during installation is prevented, and the high-voltage connection and low-voltage acquisition part of the module are protected; the protective cover 6 is made of polyvinyl chloride (PVC) or polyethylene terephthalate (PET) material by adopting a plastic sucking process.

A second aspect of the present utility model provides a battery pack, a battery pack case, and a plurality of battery modules of the above aspects provided on the case. The number of the battery modules can be selected according to the actual installation space and the requirements, and the battery modules are installed in the shell in a serial or parallel mode.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a number of simple variants of the technical solution of the utility model are possible, which simple variants and combinations should likewise be regarded as being disclosed by the utility model, all falling within the scope of protection of the utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (10)

1. The battery module is characterized by comprising a battery module, wherein the battery module comprises two groups of electric cores (1), each group of electric cores (1) comprises a plurality of electric cores (1) which are sequentially stacked and aligned along a first direction, the electric cores (1) of the two groups are aligned along a second direction which is transversely perpendicular to the first direction, and plug wire ends of the electric cores (1) of the two groups are arranged back to each other in the second direction.

2. The battery module according to claim 1, wherein foam (3) is arranged between any two cells (1) in each group of cells (1).

3. The battery module according to claim 2, wherein the thickness of the foam (3) is 1-3mm.

4. The battery module according to claim 2, further comprising a heat insulating plate (7) disposed between two groups of the cells (1).

5. The battery module according to claim 4, wherein both sides of the heat insulating plate (7) and the foam (3) are provided with adhesive.

6. The battery module according to claim 1, further comprising end plates (2) provided at both ends in the first direction of the battery module, wherein the dimension of the end plates (2) in a third direction perpendicular to the first direction and the second direction is the same as the dimension of the battery cells (1) in the third direction.

7. The battery module according to claim 6, further comprising an insulating plate (4) provided between the end plate (2) and the battery module.

8. The battery module according to claim 6, further comprising a strap (5) that is fitted over the outer peripheral surfaces of the battery module and the end plates (2) on both sides.

9. The battery module according to claim 1, further comprising protective covers (6) provided at both ends in the second direction of the battery module, wherein the protective covers (6) are provided with recessed portions facing terminals of the battery cells (1).

10. A battery pack comprising a battery pack case and a plurality of battery modules according to any one of claims 1 to 9 provided on the battery pack case.

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