CN210182435U

CN210182435U - Battery module

Info

Publication number: CN210182435U
Application number: CN201921160361.7U
Authority: CN
Inventors: Man Li; 李满; Renwei Zheng; 郑仁蔚; Jihua Yao; 姚己华
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-03-24
Anticipated expiration: 2029-07-23

Abstract

The utility model relates to an energy storage device field provides a battery module, including a plurality of battery support and a plurality of battery monomer, battery support has holding tank and connecting portion, battery monomer set up in the holding tank, a plurality of battery support set up side by side, and at least adjacent two battery support passes through connecting portion interconnect. The utility model discloses be provided with connecting portion, adjacent battery holder accessible on battery holder connecting portion interconnect can select battery holder's concatenation quantity as required consequently to make battery holder's size and can hold the free quantity of battery unadjustable, make its applicable group battery in different specifications, improved battery holder's commonality greatly.

Description

Battery module

Technical Field

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

Background

The battery monomer that adopts in the group battery mainly divide into rectangle battery monomer, cylindrical battery monomer and soft packet of formula battery monomer etc. wherein, cylindrical battery monomer mainly is through battery support equipment and fixed. Because the size of current battery support and the free quantity of battery that can hold are fixed to lead to its commonality poor, need to lead to the research and development of group battery and the manufacturing cost of production high for different group battery development design different battery support moulds.

SUMMERY OF THE UTILITY MODEL

Therefore, a battery module is needed to be provided for solving the technical problems that the size of the existing battery bracket and the number of the battery cells which can be accommodated are not adjustable, and the universality is poor.

In order to achieve the above object, the utility model provides a battery module, battery module includes:

the battery support is provided with a containing groove and a connecting part, the battery supports are arranged side by side, and at least two adjacent battery supports are mutually connected through the connecting part;

a plurality of battery monomer, battery monomer set up in the holding tank.

Furthermore, the connecting portion includes a first connecting structure and a second connecting structure, the first connecting structure is located on one side of the battery support, the second connecting structure is located on the other side of the battery support opposite to the first connecting structure, and the battery support is connected to the second connecting structure of the battery support through the first connecting structure and the other adjacent one.

Furthermore, two sides of the battery support are provided with first connecting structures, two sides of the adjacent battery support are provided with second connecting structures, and the battery support is connected with the second connecting structures of the adjacent battery support through the first connecting structures.

Furthermore, first connection structure includes the joint, second connection structure includes the joint groove, the joint with joint groove looks adaptation.

Furthermore, the battery support is provided with a plurality of first connection structures and second connection structures along the length direction.

Further, the connecting portion is disposed on two sides of the battery holder and protrudes in a direction away from the accommodating groove.

Further, can hold more than two in the holding tank the battery monomer, the battery monomer is cylindrical structure, adjacent two battery monomer end to end, at least two be connected with the sampling ring between the battery monomer, the sampling ring is connected with the sampling line.

Furthermore, be provided with spacing recess in the holding tank, the periphery of sampling ring is located in the spacing recess.

Further, the battery module is stacked with more than two layers of the battery support.

Further, the battery module further comprises a heat conducting member, and the heat conducting member is in contact with the surface of the battery cell.

Be different from prior art, above-mentioned technical scheme is provided with connecting portion on battery holder, and adjacent battery holder accessible connecting portion interconnect can select battery holder's connection quantity as required consequently to make battery holder's size and can hold the free quantity of battery adjustable, make its applicable in the group battery of different specifications, improved battery holder's commonality.

Drawings

Fig. 1 is a schematic structural view illustrating an internal structure of a battery module according to an embodiment;

fig. 2 is an exploded view illustrating an internal structure of a battery module according to an embodiment;

FIG. 3 is a schematic diagram of a single layer of the battery support and battery cells according to an embodiment;

FIG. 4 is a schematic diagram of the structure of an embodiment single layer of the battery support;

FIG. 5 is a partial enlarged view of portion A of FIG. 4;

FIG. 6 is a top view of a single one of the battery holders in an embodiment;

FIG. 7 is a schematic perspective view of a single battery holder according to an embodiment;

FIG. 8 is an exploded view of a single one of the battery holders in accordance with an embodiment;

FIG. 9 is a perspective view of the heat transfer member according to one embodiment;

description of reference numerals:

1. a battery holder;

1a, a battery bracket;

1b, a battery support;

11. a connecting portion;

11a, a first connecting structure;

11b, a second connecting structure;

111. a projection;

12. accommodating grooves;

13. a sampling loop;

131. a sampling line connection terminal;

14. a limiting groove;

2. a heat conductive member;

21. a first arc-shaped slot;

22. a second arc-shaped slot;

23. an inlet;

24. an outlet;

3. a battery cell;

4. sampling lines;

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

It should be noted that, in the description of the present application, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise specified or indicated; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Referring to fig. 1 to 9, the present invention provides a battery pack. As shown in fig. 1 and 2, the battery pack includes two or more layers of battery holders 1, the two or more layers of battery holders 1 are stacked in a vertical direction (i.e., a direction indicated by an arrow Z in fig. 1), and a plurality of battery cells 3 are disposed in each layer of battery holder 1. In the present embodiment, two or more layers of the battery holders 1 are stacked in the vertical direction, and in other embodiments, two or more layers of the battery holders 1 may be stacked in the horizontal direction (i.e., the direction indicated by the arrow X or the arrow Y in fig. 1).

As shown in fig. 3 to 5, each layer of battery holder 1 includes more than two battery holders 1 arranged side by side, each battery holder 1 is provided with a connecting portion 11 and a receiving groove 12, wherein the receiving groove 12 is used for receiving a battery cell 3, and two adjacent battery holders 1 are connected to each other through the connecting portion 11. Wherein, battery holder 1 can be by plastic material injection moulding, and battery monomer 3 can be cylindrical battery monomer, and battery monomer 1's one end is the positive pole, and the other end is the negative pole. The receiving grooves 12 may extend along the length direction of the battery holder 1 (i.e., the direction indicated by the arrow Y in fig. 3), the length of the receiving grooves 12 may be greater than the length of the battery cells 3, and each receiving groove 12 may simultaneously receive a plurality of battery cells 3 therein. In order to match the surface of the receiving groove 12 with the shape of the side surface of the battery cell 3, the surface of the receiving groove 12 may be in the shape of a circular arc. The plurality of battery cells 3 are connected to each other end to end in the accommodating groove 12, wherein the positive electrode of one of the battery cells 3 is connected to the negative electrode of the other adjacent battery cell 3 in the two adjacent battery cells 3, so that the plurality of battery cells 3 are connected in series.

As shown in fig. 4 and 5, in the battery holders located at the same layer, the

battery holders

1a and 1b that are adjacently disposed are connected to each other by the connecting portion 11, and the connecting portion 11 can make the two

adjacent battery holders

1a and 1b not easily separated in the splicing direction (i.e., the direction indicated by the arrow X in fig. 4 and 5), so that the battery holders 1 located at the same layer are connected to each other to form a whole. Therefore, in the process of research and development and production of the battery pack, the splicing number of each layer of battery support 1 can be selected according to the size of the battery pack, and different battery support molds do not need to be developed for the battery packs with different sizes.

As shown in fig. 6 to 8, in an embodiment, the connection portion 11 includes a first connection structure 11a and a second connection structure 11b, wherein the first connection structure 11a and the second connection structure 11b are adapted to each other, thereby achieving splicing. Specifically, in the embodiment shown in fig. 6 to 8, the structure of each battery holder 1 is the same, and each battery holder 1 has a first connection structure 11a and a second connection structure 11b, wherein the first connection structure 11a may be disposed at one side of the battery holder 1, and the second connection structure 11b is located at the other side opposite to the first connection structure 11 a. When assembling, the first connecting structures 11a and the second connecting structures 11b of two adjacent battery supports 1 on the same layer are opposite, namely, the first connecting structures 11a of the battery supports 1 can be connected with the second connecting structures 11b of another adjacent battery support 1.

In other embodiments, two different battery holders 1 may be provided, wherein both sides of one battery holder 1 are provided with the first connecting structures 11a and both sides of the other battery holder 1 are provided with the second connecting structures 11 b. During assembly, the two battery holders 1 are arranged adjacently, and the first connecting structure 11a and the second connecting structure 11b are arranged oppositely and connected.

The first connecting structure 11a of the battery support 1 is a clamping joint, the clamping joint protrudes towards the side direction of the battery support 1 (namely the direction indicated by the arrow X in fig. 6 to 8), the second connecting structure 11b of the battery support 1 is a clamping groove, and the clamping groove is sunken towards the middle part of the battery support. As shown in fig. 5, in order to prevent the latch from falling off from the latch groove and improve the connection reliability of the connection portion 11, the latch groove is preferably a dovetail groove, and the latch is preferably a dovetail. The dovetail joint is characterized in that the cross section of the tail end of the dovetail joint is large, and when the dovetail joint is connected into the dovetail groove in a clamped mode, the tail end of the dovetail joint abuts against the inner wall of the dovetail groove, so that the dovetail joint can be prevented from falling off from the dovetail groove.

In other embodiments, the first connecting structure 11a in the connecting portion 11 may be a snap groove, and the second connecting structure 11b is a snap groove. And, the joint groove can be T-slot or other cell bodys that opening width is less than the cell body width, and corresponding joint can be T shape round pin or other terminal width increase's round pin body structure.

As shown in fig. 6, in one embodiment, the battery holder 1 is provided with a plurality of connecting portions 11 on both sides of the battery holder 1 along the longitudinal direction (i.e., the direction indicated by the arrow Y). Therefore, the two adjacent battery supports 1 have multi-point connection along the length direction of the battery supports 1, and the connection strength and reliability of the battery supports 1 can be improved.

As shown in fig. 6 to 8, in order to prevent the connecting portion 11 from occupying the space of the receiving groove 12 of the battery holder 1, protruding portions 111 are respectively provided at both sides of the battery holder 1 in the width direction (i.e., the direction indicated by the arrow X), the protruding portions 111 extend in the length direction (i.e., the direction indicated by the arrow Y) of the battery holder 1, and the protruding portions 111 protrude in a direction away from the receiving groove 12, wherein the protruding portions 111 and the battery holder body may be of an integrally molded structure, and the connecting portion 11 is provided on the connecting portion.

As shown in fig. 7 and 8, in order to collect voltage data of the battery cells 3, sampling rings 13 are further disposed at end-to-end positions (i.e., joints of the positive electrode and the negative electrode) of two adjacent battery cells 3 in the battery holder 1, the sampling rings 13 are connected to sampling lines 4, the sampling rings 13 are electrically connected to the battery cells 3, and the sampling lines 4 can collect voltage data of the battery cells 3 through the sampling rings 13. Wherein, sampling ring 13 can be by the annular structure that conductive metal such as aluminium, copper made, the internal diameter of sampling ring 13 is roughly equal with battery monomer 3's external diameter, in two adjacent battery monomers 3, the tip (being positive pole or negative pole) of one battery monomer 3 and the tip (being negative pole or positive pole) of another battery monomer 3 stretch into sampling ring 13 from the both ends of sampling ring 13 respectively to in sampling ring 13 electricity connection, and battery monomer 3's side is connected with the medial surface of sampling ring 13, thereby realize that sampling ring 13 and battery monomer 3 are connected electrically. Can gather battery monomer 3's voltage data not only through sampling ring 13 to, the tip that two adjacent battery monomers 3 faced each other all overlaps and locates in sampling ring 13, has consequently also improved battery monomer 3 connection reliability in the holding tank 12.

In order to facilitate connection of the sampling line 4 and the sampling ring 13, a sampling line connecting terminal 131 is further arranged on the outer side surface of the sampling ring 13, the sampling line connecting terminal 131 protrudes from the outer surface of the sampling ring 13 in the direction away from the battery cell 3, and the sampling line 4 can be welded to the sampling line connecting terminal 131 or fixed on the sampling line connecting terminal 131 through a bolt.

As shown in fig. 8, a limiting groove 14 is further disposed in the accommodating groove 12, wherein the limiting groove 14 is disposed at a position where the sampling ring 13 is located in the accommodating groove 12, the limiting groove 14 is formed by recessing the inner wall of the accommodating groove 12 in a direction away from the battery cell 3, and a plurality of limiting grooves 14 can be disposed in the accommodating groove 12 according to the number of the sampling rings 13. Wherein, the length of the limiting groove 14 (i.e. the dimension along the direction indicated by the arrow Y) is equal to or slightly greater than the length of the sampling ring 13 (i.e. the dimension along the direction indicated by the arrow Y), and the depth of the limiting groove 14 (i.e. the dimension along the direction indicated by the arrow X) is equal to or slightly greater than the wall thickness of the sampling ring 13, so that the limiting groove 14 not only can accommodate the sampling ring 13, but also can limit the sampling ring 13 from moving in the accommodating groove 12 along the length direction of the battery holder 1 (i.e. the direction indicated by the Y axis).

As shown in fig. 1 and 2, since the battery cell 3 generates a large amount of heat during charging or working, in order to control the temperature of the battery cell 3 and improve the heat dissipation efficiency of the battery cell 3, the battery module further includes a heat-conducting member 2, and the heat-conducting member 2 is in contact with the surface of the battery cell 3. In order to ensure the heat conduction efficiency between the heat conduction member 2 and the single battery 3, the heat conduction member 2 can be made of heat conduction metal materials such as aluminum, aluminum alloy, copper or copper alloy, when the temperature of the single battery 3 is too high, the temperature of the single battery 3 can be transmitted to the heat conduction member 2, and then the heat conduction member 2 diffuses to the outside of the battery pack, and under the working condition in winter, when the temperature of the single battery 3 is lower, the single battery 3 can be heated through the heat conduction member 2, so that the temperature of the single battery 3 is improved.

As shown in fig. 2, a plurality of layers of battery holders 1 are provided in the battery pack in a vertical direction (i.e., a direction indicated by an arrow Z), and a plurality of battery cells 3 are provided in each layer of battery holder 1, and therefore, a plurality of layers of heat conductive members 2 are provided in the battery pack. In the embodiment shown in fig. 2, the accommodating groove 12 of the battery cell 3 is located on the upper surface of the battery holder 1, and the battery cell 3 is also located on the upper surface of the battery holder 1, so that the heat conducting member 2 of each layer is located above the corresponding layer of the battery holder 1 and the battery cell 3 in order to contact the heat conducting member 2 with the battery cell 3. As shown in fig. 2 and 9, in order to increase the contact area between the heat conducting member 2 and the battery cell 3 and improve the heat conduction efficiency between the heat conducting member 2 and the battery cell 3, a first arc-shaped groove 21 is provided on the bottom surface of the heat conducting member 2 (i.e., the surface opposite to the battery cell 3), and the groove wall of the first arc-shaped groove 21 is arc-shaped and is adapted to the side arc of the battery cell 3, so that the sidewall of the battery cell 3 can be attached to the groove wall of the first arc-shaped groove 21. As can be seen from fig. 2, the length direction of the heat conducting member 2 corresponds to the width direction of the battery holder 1 (i.e., the direction indicated by the arrow X and the splicing direction of the plurality of battery holders 1), and each heat conducting member 2 spans across the plurality of battery holders 1 and is connected to the battery cells 3 on the plurality of battery holders 1. In this embodiment, the heat conducting member 2 extends along the splicing direction of the plurality of battery holders 1 (i.e. the direction indicated by the arrow X), and is connected with the battery cells 3 on the plurality of battery holders 1, so that the battery holders 1 can be prevented from being scattered along the splicing direction (i.e. the direction indicated by the arrow X), and the structural stability of the battery pack can be improved.

Referring to fig. 2, 7, 8 and 9, in an embodiment, the battery cell 3 is a cylindrical structure, the bottom surface of the battery holder 1 is an arc-shaped curved surface, and the top surface of the heat conducting member 2 is provided with a plurality of second arc-shaped grooves 22, wherein the groove wall of the second arc-shaped groove 22 is arc-shaped and is adapted to the bottom arc-shaped curved surface of the battery holder 1, and when the battery is assembled, the bottom surface of the battery holder 1 above the heat conducting member 2 is attached to the second arc-shaped grooves 22. The second arc-shaped groove 22 can increase the contact area between the heat conducting member 2 and the battery holder 1, and the heat of the battery cell 3 can be transferred to the heat conducting member 2 through the battery holder 1, so that the heat transfer efficiency between the battery cell 3 and the heat conducting member 2 is improved. And, set up first arc wall 21 in the bottom surface of heat-conducting member 2, set up second arc wall 22 at the top surface, can reduce the clearance between heat-conducting member 2 and battery monomer 3 and the battery holder 1, be favorable to reducing the volume of group battery, save the required space of group battery installation.

As shown in fig. 9, in the embodiment, in order to improve the heat transfer efficiency of the heat conductive member 2 with the outside of the battery pack, a cooling passage is provided inside the heat conductive member 2, a cooling liquid or a cooling gas can flow in the cooling passage, and an inlet 23 and an outlet 24 are provided on the surface of the heat conductive member 2, the inlet 23 and the outlet 24 being communicated with the cooling passage. The cooling liquid or cooling gas can flow into the cooling channel in the heat conducting member 2 through the inlet 23 to exchange heat with the heat conducting member 2, and then flow out of the heat conducting member 2 through the outlet 24, and the cooling liquid or cooling gas flowing out of the outlet 24 can be transmitted to the outside of the battery pack through a pipeline to exchange heat, and then flow into the heat conducting member 2 through the inlet 23 to be recycled.

Claims

1. A battery module, comprising:

a plurality of battery monomer, battery monomer set up in the holding tank.

2. The battery module according to claim 1, wherein the connection part comprises a first connection structure and a second connection structure, the first connection structure is located at one side of the battery support, the second connection structure is located at the other side of the battery support opposite to the first connection structure, and the battery support is connected with the second connection structure of another adjacent battery support through the first connection structure.

3. The battery module according to claim 1, wherein the battery holder is provided with first connecting structures at both sides thereof, and a second connecting structure at both sides thereof, and the battery holder is connected to the second connecting structure of the other adjacent battery holder through the first connecting structures.

4. The battery module according to claim 2 or 3, wherein the first connecting structure comprises a clamping connector, the second connecting structure comprises a clamping groove, and the clamping connector is matched with the clamping groove.

5. The battery module according to claim 2 or 3, wherein the battery holder is provided with a plurality of the first and second connection structures along a length direction.

6. The battery module according to claim 1, wherein the connecting parts are disposed at both sides of the battery holder and protrude in a direction away from the receiving groove.

7. The battery module according to claim 1, wherein the accommodating groove is capable of accommodating more than two single batteries, each single battery is of a cylindrical structure, two adjacent single batteries are connected end to end, a sampling ring is connected between at least two single batteries, and the sampling ring is connected with a sampling line.

8. The battery module according to claim 7, wherein a limiting groove is formed in the accommodating groove, and the outer periphery of the sampling ring is located in the limiting groove.

9. The battery module according to claim 1, wherein the battery module is stacked with two or more layers of the battery holder.

10. The battery module according to claim 1, further comprising a heat conductive member contacting a surface of the battery cell.