CN217691301U - Battery pack - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of batteries, and discloses a battery pack, which comprises a battery pack and a battery monitoring unit, wherein the battery pack comprises a plurality of battery units which are arranged side by side along the row direction; the battery cell located at one end of the battery pack in the column direction has a bulge portion formed in a central region of an end face of the battery pack in the column direction. The battery monitoring unit is disposed at an end surface of the battery pack, and the battery monitoring unit is offset from the expansion portion in the column direction. Because the battery monitoring unit is staggered with the expansion part, the expansion part of the battery unit can not extrude the battery monitoring unit, thereby avoiding influencing the normal work of the battery monitoring unit and improving the reliability of monitoring battery signals.

Description

Battery pack

Technical Field

The embodiment of the utility model provides a relate to battery technical field, particularly, relate to a battery package.

Background

A battery monitoring unit (CSC) is a control system in a battery pack and is used to monitor battery information such as voltage and temperature of each battery Cell or battery pack. However, the battery monitoring unit in the related art is susceptible to other components within the battery pack, resulting in reduced operational reliability.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a can improve battery monitoring unit operational reliability's battery package.

The battery pack comprises a battery pack and a battery monitoring unit, wherein the battery pack comprises a plurality of battery units which are arranged side by side along the row direction; the battery cell at one end of the battery pack has an expanded portion formed in a central region of an end surface of the battery pack in the column direction along the column direction. The battery monitoring unit is provided at an end face of the battery pack, and the battery monitoring unit is displaced from the expansion portion in the column direction.

An embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses battery package, with the terminal surface of battery monitoring unit setting at the group battery, and along the direction of being listed as, battery monitoring unit staggers mutually with the inflation. Therefore, when the expansion part of the battery unit deforms, the battery monitoring unit and the expansion part are staggered, so that the expansion part of the battery unit can not extrude the battery monitoring unit, the normal work of the battery monitoring unit is prevented from being influenced, and the reliability of monitoring battery signals is improved.

Drawings

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

Fig. 2 is a plan view of a first embodiment of the battery monitoring unit and the battery pack according to the present invention.

Fig. 3 is a plan view of a second embodiment of the battery monitoring unit and the battery pack according to the present invention.

Fig. 4 is a plan view of a third embodiment of the battery monitoring unit and the battery pack of the present invention.

Fig. 5 is a side view of the battery monitoring unit and the battery pack according to the present invention.

Fig. 6 shows a schematic view of the mounting bracket of the present invention.

Fig. 7 shows the schematic view of the mounting rack of the present invention installed on the lower box.

Wherein the reference numerals are as follows:

100. battery pack

1. Box body

11. Upper box body

12. Lower box body

13. Partition wall

131. Gap

14. A first accommodating space

15. The second containing space

2. Conducting bar combination

3. Battery pack

31. Battery unit

32. Expansion part

33. Junction point

4. Battery monitoring unit

41. First part

42. The second part

5. Mounting rack

51. Mounting surface

52. Projection part

53. Body part

54. First connecting part

541. First through hole

55. Second connecting part

551. Second through hole

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments 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, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 1, fig. 1 is an exploded schematic view of a battery pack 100 according to an embodiment of the present invention. The utility model discloses battery package 100 includes box 1, electrically conducts row combination 2, group battery 3 and battery monitoring unit 4. The box body 1 is provided with a sealed cavity, and the conductive bar combination 2, the battery pack 3 and the battery monitoring unit 4 are arranged in the sealed cavity. The conductive bar assembly 2 may be disposed above the battery 3 for connecting the poles of the battery 3. The battery monitoring unit 4 is connected to the busbar assembly 2 for monitoring the battery signal of the battery pack 3.

It is understood that the battery signal may include the temperature, current, voltage, etc. of the battery.

The terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

And the sealed cavity also contains cooling liquid, and the cooling liquid immerses the conductive bar combination 2, the battery pack 3 and the battery monitoring unit 4. Through the circulation flow of the cooling liquid, the heat generated by the conductive bar combination 2, the battery pack 3 and the battery monitoring unit 4 is led out, so that the heat is dissipated from the conductive bar combination 2, the battery pack 3 and the battery monitoring unit 4.

The case 1 includes an upper case 11 and a lower case 12, and the upper case 11 and the lower case 12 are hermetically connected to form the above-mentioned sealed chamber for accommodating the busbar assembly 2, the battery pack 3 and the battery monitoring unit 4.

The battery pack 3 includes a plurality of battery cells 31, and the plurality of battery cells 31 are arranged side by side in a column direction. As an example, each battery cell 31 has a rectangular parallelepiped shape, and the width direction of each battery cell 31 is parallel to the column direction. That is, when the battery cells 31 have a rectangular parallelepiped shape, two adjacent battery cells 31 are arranged side by side with surfaces having the largest area being bonded to each other.

Of course, the plurality of battery cells 31 may be arranged side by side, and adjacent battery cells 31 may be arranged side by side with their wide and high surfaces being in contact with each other.

In addition, in the present invention, the number of the battery packs 3 is not particularly limited, and for example, the battery packs 3 may be one set, two sets, three sets, or another number. When the number of the battery packs 3 is plural, the plural battery packs 3 are arranged side by side in a row direction, wherein the row direction is perpendicular to the column direction. Thus, the plurality of battery cells 31 form a battery array.

In the present embodiment, the battery pack 100 includes three groups of battery packs 3, the three groups of battery packs 3 being arranged side by side in the row direction. Each battery pack 3 includes a plurality of battery cells 31, and the plurality of battery cells 31 are arranged side by side in the column direction.

As shown in fig. 2, fig. 2 is a plan view of the battery monitoring unit 4 and the battery pack 3 according to the first embodiment of the present invention. The battery cell 31 located at one end of the battery pack 3 has a swelling portion 32, and the swelling portion 32 is formed in the center region of the end face of the battery pack 3 in the column direction.

Specifically, when the battery cell 31 is operated, the battery cell 31 may swell, causing outward convex deformation of the case of the battery cell 31, and the deformation of the battery cell 31 may press a device around the battery pack 3, such as the battery monitoring unit 4. Since the center region of one side surface of the battery cell 31 is farther from the edge of the battery cell 31, the expansion deformation of the center region is large. For ease of understanding, the battery cell 31 is in the shape of a rectangular parallelepiped. The central region of one side surface (i.e., the "large surface" of the rectangular parallelepiped) where the length and height of the battery cell 31 in the shape of a rectangular parallelepiped are formed is the swelling portion 32, that is, the central region of the side surface of the battery cell 31 is the intersection region of two diagonal lines.

With continued reference to fig. 2, it can be understood that the plurality of battery cells 31 of each group of battery packs 3 each have the bulging portion 32, and since the plurality of battery cells 31 are arranged side by side, the deformations of the respective bulging portions 32 of the plurality of battery cells 31 are superposed, and the finally superposed deformation occurs in the bulging portion 32 of the battery cell 31 located at one end in the row direction in the battery pack 3.

The utility model discloses battery monitoring unit 4 of embodiment sets up the terminal surface at group battery 3 to along the direction of being listed as, battery monitoring unit 4 staggers mutually with inflation portion 32.

The utility model discloses battery package 100 sets up battery monitoring unit 4 at the terminal surface of group battery 3, and along the direction of being listed as, battery monitoring unit 4 staggers with inflation portion 32 mutually. Thus, when the expansion part 32 of the battery unit 31 deforms, the battery monitoring unit 4 is not pressed by the expansion part 32 of the battery unit 31 due to the fact that the battery monitoring unit 4 and the expansion part 32 are staggered, normal operation of the battery monitoring unit 4 is prevented from being influenced, and reliability of monitoring battery signals is improved.

Referring to fig. 2, a plurality of battery packs 3 are arranged side by side along the row direction, and a boundary 33 is formed between two adjacent battery packs 3 along the row direction. Along the column direction, the battery monitoring unit 4 is disposed centrally at the boundary 33 of two adjacent battery packs 3. In other words, the battery monitoring units 4 cross two adjacent battery stacks 3 in the row direction, and the battery monitoring units 4 are equally divided by the boundary 33.

It is understood that the boundary 33 formed between the adjacent two battery packs 3 in the row direction may be a gap or may be a gap. When the interface 33 is a gap, two adjacent battery packs 3 are spaced apart, and the gap can be used for accommodating the cushion pad. When the boundary 33 is seamless, the adjacent two battery packs 3 are directly bonded.

Along the row direction, with the boundary 33 as a center line, the battery monitoring unit 4 is divided into a first part 41 and a second part 42, and the first part 41 and the second part 42 are substantially the same in shape/size. In the column direction, the first portion 41 corresponds to the adjacent one of the cell groups 3, and the first portion 41 is offset from the expansion part 32 of the one of the cell groups 3. In the column direction, the second portion 42 corresponds to another adjacent group of battery packs 3, and the second portion 42 is offset from the expanded portion 32 of the other group of battery packs 3. In this way, under the condition that the size of the battery monitoring unit 4 is large, because the battery monitoring unit 4 is centrally arranged at the boundary 33 between two adjacent groups of battery packs 3, the battery monitoring unit 4 is far away from the expansion part 32 of each group of battery packs 3 as far as possible, and corresponds to the position of the battery pack 3 with small expansion deformation, so as to avoid the expansion part 32 from deforming to press the battery monitoring unit 4.

As shown in fig. 3, fig. 3 is a plan view of a second embodiment of the battery monitoring unit 4 and the battery pack 3 according to the present invention. The parts of the second embodiment that are the same as the parts of the first embodiment will not be described again, and the differences are as follows: the orthographic projection of the battery monitoring unit 4 on the plurality of battery packs 3 along the column direction at least partially coincides with the boundary 33.

Specifically, the battery monitoring unit 4 of the present embodiment is not centrally disposed on the boundary 33, but the battery monitoring unit 4 is divided into a first portion 41 and a second portion 42 having different sizes by the boundary 33 in the row direction.

In the present embodiment, the size of the first portion 41 is larger than the size of the second portion 42. Of course, in some embodiments, the size of the first portion 41 may also be smaller than the size of the second portion 42.

As shown in fig. 4, fig. 4 is a plan view of a third embodiment of the battery monitoring unit 4 and the battery pack 3 according to the present invention. The parts of the third embodiment that are the same as the parts of the first embodiment will not be described again, but the differences are as follows: along the column direction, the battery monitoring units 4 are provided corresponding to only one group of the battery packs 3.

That is, the orthographic projection of the battery monitoring unit 4 onto the battery assembly 3 along the column direction falls only within the end face of one set of the battery assembly 3, and is shifted from the bulging portion 32 of the battery assembly 3.

It is to be understood that when the battery pack 100 includes only one battery pack 3, the battery monitoring unit 4 may be arranged using the embodiment shown in fig. 4.

As shown in fig. 5, fig. 5 is a side view of the battery monitoring unit 4 and the battery pack 3 according to the present invention. The battery monitoring unit 4 is disposed at a distance from the end face of the battery pack 3. Because inflation portion 32 is formed in the terminal surface of group battery 3, in this embodiment, set up battery monitoring unit 4 and the terminal surface interval of group battery 3 for when inflation portion 32 inflation deformation, the inflation of inflation portion 32 can be alleviated in the space between the terminal surface of battery monitoring unit 4 and group battery 3, avoid battery monitoring unit 4 and group battery 3 direct laminating and cause inflation portion 32 extrusion battery monitoring unit 4.

As shown in fig. 1 and fig. 6, fig. 6 is a schematic view of the mounting frame 5 of the present invention. The utility model discloses battery package 100 still includes mounting bracket 5, and mounting bracket 5 sets up in the sealed cavity of box 1 to be connected with box 1. The battery monitoring unit 4 is connected to a mounting bracket 5.

The mounting bracket 5 is provided at an end face of the battery pack 3 and has a mounting surface 51 facing away from the battery pack 3, and the battery monitoring unit 4 is mounted on the mounting surface 51. The mounting frame 5 may be made of a metal material, and further, the mounting frame 5 may be made of a metal material having a relatively high structural rigidity, such as steel. Because the mounting bracket 5 is connected with the box body 1, and the structural hardness of the mounting bracket 5 is larger, the mounting bracket 5 is not easy to deform. When the battery pack 3 expands and the expansion part 32 presses the mounting bracket 5, the mounting bracket 5 can relieve the pressing of the expansion part 32, so that the battery monitoring unit 4 is not easily pressed.

The mounting bracket 5 further has a projection 52, and the projection 52 is projected from the mounting surface 51, and allows the battery monitoring unit 4 to be spaced apart from the mounting surface 51. The provision of the projecting portion 52 allows the battery monitor unit 4 to be disposed at a distance from the mounting surface 51, and the clearance between the battery monitor unit 4 and the mounting surface 51 further alleviates the compression of the bulging portion 32. In addition, the convex portion 52 can also enhance the structural strength of the mounting bracket 5, and is less likely to be deformed when pressed by the expansion portion 32.

It will be appreciated that the shape of the projection 52 may be a bump, a bead, other suitable shape, or a combination thereof. When the protruding portion 52 is a protruding point, the mounting surface 51 is protruded with a plurality of protruding points, and the plurality of protruding points may be arranged in an array. When the projection 52 is a rib, the number of ribs may be plural. Each rib may extend in the row direction or in a direction perpendicular to the row direction. Of course, the projection 52 may be a combination of a convex point and a convex rib.

With continued reference to fig. 6, the mounting bracket 5 includes a body portion 53, a first connecting portion 54 and a second connecting portion 55. One side surface of the body portion 53 forms the mounting surface 51, and the projecting portion 52 is projected from the side surface of the body portion 53. The battery monitoring unit 4 is mounted to the body portion 53. The first connecting portion 54 is connected to the body portion 53 for connection with the partition wall 13 of the cabinet 1. The second connecting portion 55 is connected to the body portion 53 for connection with the bottom wall of the lower case 12.

As an example, the first connection portion 54, the second connection portion 55, and the body portion 53 are of an integral structure. The first connection portion 54 and the second connection portion 55 may each be a flange structure formed at an edge of the body portion 53 by being integrally bent.

The first connection portion 54 has a first through hole 541, and the second connection portion 55 has a second through hole 551. The first through hole 541 and the second through hole 551 allow bolts to pass through, so that the mounting frame 5 is connected to the box 1 by bolts, but not limited thereto.

As shown in fig. 7, fig. 7 is a schematic view illustrating the installation frame 5 of the present invention installed on the lower case 12. The utility model discloses the box still includes division wall 13, and division wall 13 can integrated into one piece in lower box 12, and division wall 13 extends along the capable direction to separate sealed cavity for first accommodation space 14 and second accommodation space 15. The battery pack 3 is accommodated in the first accommodation space 14, and the battery monitoring unit 4 is accommodated in the second accommodation space 15. The first coupling portion 54 of the mounting bracket 5 is coupled to the partition wall 13, and the second coupling portion 55 of the mounting bracket 5 is coupled to the bottom wall of the lower case 12.

As shown in fig. 6 and 7, the main body 53 of the mounting bracket 5 may have a plate-like structure, and the main body 53 is attached to a side surface of the partition wall 13 facing the second accommodating space 15. A side surface of the body portion 53 facing away from the partition wall 13 is formed with a mounting surface 51 so that the battery monitoring unit 4 is attached to a side of the mounting bracket 5 facing away from the partition wall 13.

Since the battery monitoring unit 4 is mounted to the mounting bracket 5, the second coupling part 55 of the mounting bracket 5 is coupled to the lower case 12. In this way, the mounting bracket 5 can also function to conduct heat, so that heat generated by the battery monitoring unit 4 is conducted to the lower case 12 through the mounting bracket 5.

The partition wall 13 has a gap 131, and the gap 131 is connected to the first accommodating space 14 and the second accommodating space 15. Through the provision of the notch 131, the cooling liquid flows back and forth in the first accommodation space 14 and the second accommodation space 15, so that the cooling liquid cools the battery pack 3 and the battery monitoring unit 4.

It is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

In the embodiments of the present invention, the terms "first", "second", "third" 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 expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims (10)

1. A battery pack, comprising:

a battery pack including a plurality of battery cells arranged side by side in a column direction; the battery cell at one end of the battery pack has an expanded portion formed in a central region of an end surface of the battery pack in the column direction along the column direction; and

and a battery monitoring unit provided at an end surface of the battery pack and displaced from the expansion portion in the row direction.

2. The battery pack according to claim 1, wherein the battery pack includes a plurality of the battery packs, the plurality of battery packs being arranged side by side in a row direction; wherein the row direction and the column direction are perpendicular to each other;

the orthographic projection of the battery monitoring unit on the plurality of battery packs along the column direction at least partially coincides with the junction of two adjacent battery packs.

3. The battery pack of claim 2, wherein the battery monitoring unit is centrally disposed at a boundary between two adjacent battery packs along the column direction.

4. The battery pack according to claim 1, wherein the battery monitoring unit is disposed at a distance from the end surface of the battery pack.

5. The battery pack according to any one of claims 1 to 4, characterized in that the battery pack further comprises:

the box body is provided with a sealed cavity, and the battery pack and the battery monitoring unit are arranged in the sealed cavity; and

the mounting bracket sets up in the sealed cavity, and with the box is connected, the battery monitoring unit with the mounting bracket is connected.

6. The battery pack of claim 5, wherein the mounting bracket is disposed at an end face of the battery pack and has a mounting face facing away from the battery pack, the battery monitoring unit being mounted to the mounting face.

7. The battery pack of claim 6, wherein the mounting bracket further comprises a protrusion protruding from the mounting surface and spacing the battery monitoring unit from the mounting surface.

8. The battery pack according to claim 5, wherein the case further includes a partition wall extending in a row direction and dividing the sealed chamber into a first accommodating space in which the battery pack is accommodated and a second accommodating space in which the battery monitoring unit is accommodated;

the mounting rack is connected to the partition wall.

9. The battery pack of claim 8, wherein the battery monitoring unit is connected to a side of the mounting frame facing away from the dividing wall.

10. The battery pack of claim 8, wherein the mounting bracket comprises:

a body part to which the battery monitoring unit is mounted;

the first connecting part is connected with the body part and is connected with the isolation wall; and

and the second connecting part is connected with the body part and is connected with the bottom wall of the box body.

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