CN213340626U

CN213340626U - Battery module

Info

Publication number: CN213340626U
Application number: CN202022188294.9U
Authority: CN
Inventors: 张钊; 冯炎强; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-01
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a battery module belongs to power battery technical field. The battery module comprises at least two groups of battery stacking modules and a liquid cooling plate, wherein the battery stacking modules are stacked along a first direction, each group of battery stacking modules is arranged along a second direction, and the second direction is perpendicular to the first direction; a liquid cooling plate is disposed between the two sets of cell stack modules. The utility model provides a battery module, the liquid cold plate sets up inside battery module, makes the structure compacter, has improved the space utilization of battery package box, and then has improved the energy density of battery package; the liquid cooling plate is arranged between the battery stacking modules along the second direction, the height of the battery module is reduced, the height of the battery pack is further reduced, the installation applicability of the battery pack is improved under the condition that the height of the vehicle chassis is constant, and the installation layout is convenient.

Description

Battery module

Technical Field

The utility model relates to a power battery technical field especially relates to a battery module.

Background

At present, a battery module and a liquid cooling device in a battery pack are separately arranged and respectively fixed in a battery pack box, for example, the liquid cooling device is firstly fixed at the bottom of the battery pack box, and then the battery module is placed above the liquid cooling device and fixed in the battery pack box. Because the liquid cooling device is installed between battery module and box, make the box be used for installing receiving the restriction of battery module space, restricted the promotion of battery package energy density, and then reduced electric automobile's continuation of the journey mileage to the liquid cooling device has increased the height of battery package, and under the high certain circumstances of vehicle chassis, the use of battery package has received the restriction.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery module which has compact structure and improves the energy density of a battery pack; the height is reduced, the applicability is improved, and the installation layout is convenient.

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

a battery module, comprising:

at least two groups of battery stacking modules, wherein the battery stacking modules are stacked along a first direction, and each group of battery stacking modules is arranged along a second direction which is perpendicular to the first direction;

and a liquid cooling plate disposed between the two sets of cell stack modules.

Optionally, the battery module still includes compound end plate, and compound end plate sets up the tip at the battery pile up the module along the third direction, and the liquid cooling plate is provided with the coupling along the tip of third direction, and the coupling is worn to locate compound end plate.

Optionally, the battery module includes the compound end plate that two symmetries set up, and the liquid cooling plate is including two couplings that the symmetry set up, and two couplings wear to locate two compound end plates respectively.

Optionally, the composite end plate comprises:

the end face of the plastic end plate is provided with a first groove, and the bottom wall of the first groove is provided with a first through hole;

the rigid end plate is arranged on the end face, close to the end face, on one side of the first groove, of the plastic end plate and connected with the plastic end plate, the second groove is formed in the rigid end plate and arranged opposite to the first groove, and the pipe joint is contained in the first groove and the second groove.

Optionally, a third groove is further formed in the rigid end plate, the third groove is a T-shaped groove, the T-shaped groove comprises a first groove portion and a second groove portion, two ends of the first groove portion are communicated with the second groove and the outside respectively, and two ends of the second groove portion are communicated with the first groove portion and the outside respectively.

Optionally, a second through hole for penetrating through an electrode of the battery stacking module is formed in the plastic end plate, a fourth groove is formed in the rigid end plate, a groove wall of the fourth groove is communicated with the second through hole, the battery module further comprises a protective cover, and the protective cover is installed on the fourth groove and covers the electrode.

Optionally, the inner diameter dimension of the second groove is not less than the inner diameter dimension of the first groove.

Optionally, the first groove is a sink groove, and the second groove is a U-shaped groove.

Optionally, the rigid end plate is injection molded to the plastic end plate.

Optionally, the battery module still includes along first direction relative upper cover plate and the lower apron that sets up, and the upper cover plate is "U" font, and upper cover plate, lower apron and two compound end plates form the casing, and the battery piles up module and liquid cooling plate setting in the inside of casing.

Optionally, the battery module further comprises an FPC assembly, the FPC assembly is electrically connected to the battery stacking module, one side of the composite end plate, which is close to the battery stacking module, is provided with a mounting groove, and the FPC assembly is disposed in the mounting groove.

The utility model has the advantages that:

in the battery module provided by the utility model, the liquid cooling plate is arranged inside the battery module, so that the structure is more compact, the space utilization rate of the battery pack box body is improved, and the energy density of the battery pack is further improved; the liquid cooling plate is arranged between the battery stacking modules along the second direction, the height of the battery module is reduced, the height of the battery pack is further reduced, the installation applicability of the battery pack is improved under the condition that the height of the vehicle chassis is constant, and the installation layout is convenient.

Drawings

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

fig. 2 is a schematic structural view of a composite end plate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

In the figure:

1-a composite end plate; 11-plastic end plate; 111-a first recess; 112-a first via; 12-a rigid end plate; 121-a second groove; 122-a third groove; 1221-a first groove portion; 1222-a second groove portion; 123-a fourth groove;

2-a cell stack module; 3-liquid cooling plate; 31-a pipe joint; 4-upper cover plate; 5-lower cover plate; 6-FPC assembly; 7-protective cover.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present embodiment provides a battery module including at least two sets of battery stacking modules 2 and a liquid cooling plate 3. Specifically, as shown in fig. 1, wherein the x-direction, the y-direction, and the z-direction denote a first direction, a second direction, and a third direction, respectively, the battery stack modules 2 are stacked in the first direction, and the respective sets of the battery stack modules 2 are disposed in the second direction, which is perpendicular to the first direction; a liquid-cooled plate 3 is disposed between the two sets of cell stack modules 2. The liquid cooling plate 3 is arranged inside the battery module, so that the structure is more compact, the space utilization rate of the battery pack box body is improved, and the energy density of the battery pack is further improved; the liquid cooling plate 3 is arranged between the battery stacking modules 2 along the second direction, so that the height of the battery module in the first direction is reduced, and the height of the battery pack is further reduced; specifically, first direction x is to being vertical direction, has consequently reduced the height of the vertical direction of battery module, and then has reduced the height of the vertical direction of battery package, highly certain circumstances under the vehicle chassis, has improved the installation suitability of battery package, the installation overall arrangement of being convenient for.

Specifically, the battery stack module 2 includes a plurality of battery cells, each of which is stacked in a first direction; in this embodiment, the battery module includes two sets of battery stacking modules 2 and one liquid cooling plate 3, and in other embodiments, more than three sets of battery stacking modules 2 may be provided, and the liquid cooling plate 3 is provided between every two adjacent battery stacking modules 2, so that the battery module is cooled uniformly.

Optionally, the battery module still includes composite end plate 1, and composite end plate 1 sets up the tip at battery stack module 2 along the third direction, and liquid cooling plate 3 is provided with coupling 31 along the tip of third direction, and coupling 31 wears to locate composite end plate 1, has reduced coupling 31 and has accounted for the space in the third direction, has reduced the volume of battery module in the third direction. When the size of the composite end plate 1 is small and the structure of the pipe joint 31 is large, optionally, as shown in fig. 1, the battery module includes two composite end plates 1 symmetrically arranged, the liquid cooling plate 3 includes two pipe joints 31 symmetrically arranged, and the two pipe joints 31 respectively penetrate through the two composite end plates 1, so that the structural installation layout is facilitated.

Specifically, as shown in fig. 2, the composite end plate 1 includes a plastic end plate 11 and a rigid end plate 12, the plastic end plate 11 plays an insulating role, and the battery stacking module 2 arranged inside is prevented from short-circuiting with the outside through the composite end plate 1, and the rigid end plate 12 can be made of a metal material, so that the structural strength of the composite end plate 1 is improved. Specifically, a first groove 111 is formed in an end surface of the plastic end plate 11, and a first through hole 112 is formed in a bottom wall of the first groove 111; rigid end plate 12 sets up and is close to the terminal surface of seting up first recess 111 one side at plastic end plate 11 to be connected with plastic end plate 11, seted up second recess 121 on rigid end plate 12, second recess 121 sets up with first recess 111 relatively, and coupling 31 holds on first recess 111 and second recess 121, thereby has reduced the shared space of coupling 31, simple structure, and processing is convenient.

Alternatively, the inner diameter dimension of the second groove 121 is not smaller than the inner diameter dimension of the first groove 111 to facilitate the installation of the pipe joint 31. Specifically, first recess 111 is heavy groove, avoids seting up U type groove, improves structural strength, and second recess 121 is U type groove, increases coupling 31's installation space, the installation of being convenient for.

Optionally, the rigid end plate 12 is further provided with a third groove 122 for accommodating a water pipe connected to the pipe joint 31; specifically, third recess 122 is T type groove, and T type groove includes first slot part 1221 and second slot part 1222, the both ends of first slot part 1221 respectively with second recess 121 and outside intercommunication, the both ends of second slot part 1222 respectively with first slot part 1221 and outside intercommunication, the water pipe holds behind second recess 121 and first slot part 1221, accessible first slot part 1221 or second slot part 1222 stretch out to the outside, reduced the water pipe in third direction occupation space, and then improved the mounting density of battery module along the third direction on the box, improved energy density.

When being connected with a plurality of water pipes on the liquid cooling plate 3, optionally, set up a plurality of third recesses 122 on the rigidity end plate 12 to increase the installation space of water pipe, two adjacent third recesses 122 symmetry sets up the both sides at second recess 121, in order to improve the aesthetic property. When there are three or more groups of battery stacking modules 2, two or more liquid cooling plates 3 are disposed, and accordingly, the composite end plate 1 is provided with a plurality of first through holes 112, first grooves 111, second grooves 121, and third grooves 122, and the third grooves 122 are used for accommodating water pipes connected to different liquid cooling plates 3.

Optionally, the rigid end plate 12 is connected to the plastic end plate 11 in an injection molding mode, so that the processing is simple and the connection is reliable. Alternatively, the rigid end plate 12 and the plastic end plate 11 may be connected by a snap connection or a fastener; optionally, the plastic end plate 11 is provided with a connecting portion, the connecting portion is connected with the rigid end plate 12, the connecting portion and the rigid end plate 12 are the same in shape, and positioning is performed through the connecting portion and the rigid end plate 12, so that connection accuracy is improved, and subsequent installation is facilitated.

As shown in fig. 1-3, in the present embodiment, the battery module includes an upper cover plate 4 and a lower cover plate 5 oppositely disposed along a first direction, the upper cover plate 4 is shaped like an inverted u, the upper cover plate 4, the lower cover plate 5 and two composite end plates 1 form a shell, and the battery stacking module 2 and the liquid cooling plate 3 are disposed in an inner space of the shell to avoid damage from an external structure. Further specifically, the upper cover plate 4, the lower cover plate 5 and the two composite end plates 1 can be connected through fasteners, so that the assembly and disassembly are convenient.

Optionally, the battery module further includes a Flexible Printed Circuit (FPC) assembly 6, the FPC assembly 6 is electrically connected to the battery stacking module 2, the composite end plate 1 is close to one side of the battery stacking module 2, and a mounting groove is formed in the side, close to the battery stacking module 2, of the composite end plate 1, the FPC assembly 6 is disposed in the mounting groove, so that the space occupied by the FPC assembly 6 is reduced, and the volume of the battery module in the third direction is reduced.

Optionally, a second through hole for penetrating through the electrode of the battery stacking module 2 is formed in the plastic end plate 11, a fourth groove 123 is formed in the rigid end plate 12, a groove wall of the fourth groove 123 is communicated with the second through hole, the battery module further comprises a protective cover 7, the protective cover 7 is installed on the fourth groove 123 and covers the electrode, in the transportation process, the electrode is prevented from being damaged after being exposed to the outside and contacting with the outside, the protective cover 7 plays a role in protecting the electrode, the protective cover 7 can be taken down when the battery module is used, and the fourth groove 123 is arranged to facilitate installation of the protective cover 7 in a buckling and clamping mode.

The embodiment also provides a battery pack, which comprises the battery module, and is high in energy density, small in height and convenient to install and arrange.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery module, comprising:

at least two sets of battery stacking modules (2), the battery stacking modules (2) being stacked in a first direction, each set of the battery stacking modules (2) being disposed in a second direction, the second direction being perpendicular to the first direction;

a liquid cooling plate (3) disposed between the two sets of cell stack modules (2).

2. The battery module according to claim 1, further comprising a composite end plate (1), wherein the composite end plate (1) is disposed at an end of the battery stack module (2) in the third direction, and wherein a pipe joint (31) is disposed at an end of the liquid cooling plate (3) in the third direction, and the pipe joint (31) is inserted into the composite end plate (1).

3. The battery module according to claim 2, characterized in that the battery module comprises two symmetrically arranged composite end plates (1), the liquid cooling plate (3) comprises two symmetrically arranged pipe joints (31), and the two pipe joints (31) are respectively arranged through the two composite end plates (1).

4. The battery module according to claim 2, wherein the composite end plate (1) comprises:

the end face of the plastic end plate (11) is provided with a first groove (111), and the bottom wall of the first groove (111) is provided with a first through hole (112);

rigid end plate (12), set up plastic end plate (11) are close to and have seted up the terminal surface of first recess (111) one side, and with plastic end plate (11) are connected, second recess (121) have been seted up on rigid end plate (12), second recess (121) with first recess (111) set up relatively, coupling (31) hold in first recess (111) with on second recess (121).

5. The battery module according to claim 4, wherein the rigid end plate (12) further defines a third groove (122), the third groove (122) is a T-shaped groove, the T-shaped groove includes a first groove portion (1221) and a second groove portion (1222), two ends of the first groove portion (1221) are respectively communicated with the second groove portion (121) and the outside, and two ends of the second groove portion (1222) are respectively communicated with the first groove portion (1221) and the outside.

6. The battery module according to claim 4, wherein the plastic end plate (11) has a second through hole for passing through an electrode of the battery stacking module (2), the rigid end plate (12) has a fourth groove (123), a groove wall of the fourth groove (123) is communicated with the second through hole, and the battery module further comprises a protective cover (7), wherein the protective cover (7) is mounted on the fourth groove (123) and covers the electrode.

7. The battery module according to any one of claims 4 to 6, wherein the first groove (111) is a sink groove, the second groove (121) is a U-shaped groove, and the inner diameter of the second groove (121) is not smaller than the inner diameter of the first groove (111).

8. A battery module according to any of claims 4 to 6, characterised in that the rigid end plates (12) are injection moulded onto the plastic end plates (11).

9. The battery module according to any one of claims 2 to 6, further comprising an upper cover plate (4) and a lower cover plate (5) oppositely disposed in the first direction, wherein the upper cover plate (4) has an inverted U-shape, the upper cover plate (4), the lower cover plate (5) and the two composite end plates (1) form a housing, and the battery stack module (2) and the liquid-cooling plate (3) are disposed inside the housing.

10. The battery module according to any one of claims 2 to 6, further comprising an FPC assembly (6), wherein the FPC assembly (6) is electrically connected with the battery stack module (2), wherein a mounting groove is formed in one side of the composite end plate (1) away from the battery stack module (2), and the FPC assembly (6) is disposed in the mounting groove.