CN219163604U

CN219163604U - Battery cell module and battery pack

Info

Publication number: CN219163604U
Application number: CN202223467267.0U
Authority: CN
Inventors: 曲凡多; 张放南; 林志宏
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-06-09
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to a battery cell module and a battery pack, wherein the battery cell module comprises: a cell unit; a cooling plate is arranged on one side of the battery cell unit; a plurality of battery cell monomers are stacked in sequence to form a battery cell module; the adjacent sides of two adjacent battery core monomers are the cooling plates of one battery core monomer, and the cooling plates are arranged on one side of the battery core monomer, so that the wall thickness of the battery core monomer is thinned to realize light energy density improvement, and the cooling plates can be directly contacted with a pole group and electrolyte in the battery core monomer, thereby improving the heat conducting performance, and meanwhile, the battery core monomer part can be protected by arranging the cooling plates.

Description

Battery cell module and battery pack

Technical Field

The utility model relates to the technical field of power battery spare and accessory parts, in particular to a battery cell module and a battery pack.

Background

In order to ensure that the power battery can work in a proper temperature range, a thermal management system is usually arranged inside the power battery to dissipate heat of the battery pack in a high-temperature environment and keep the battery pack warm in a low-temperature environment.

At present, a cooling plate is used for radiating heat of a battery module forming a power battery pack, which is the most common mode.

In the prior art, the battery core and the cooling plate are generally in a separation structure, the assembly mode is complex in operation, and the contact effect between the cooling plate and the battery module is easily affected by the assembly condition; and the occupied space is easy to increase, the cost is increased, the structural strength is weakened after the cell shell is thinned after the cell shell is used for a period of time, and additional protection measures are needed.

Disclosure of Invention

In order to solve the problem that the contact effect between the cooling plate and the battery module is easily affected by the assembly condition; and the occupied space is easy to increase, the cost is increased, and the structural strength is weakened after the battery cell shell is thinned after the battery cell is used for a period of time.

The utility model provides a battery cell module for realizing the purpose, which comprises: a cell unit; a cooling plate is arranged on one side of the battery cell unit; a plurality of battery cell monomers are stacked in sequence to form a battery cell module; the adjacent sides of the adjacent two battery cell monomers are cooling plates of one battery cell monomer.

In some embodiments, a plurality of connectors are disposed on the cooling plate of each cell unit, a cooling passage is formed in the cooling plate, each connector is communicated with the cooling passage, and at least one connector of the cooling plate of at least one cell unit is communicated with an external interface of the cell module.

In some embodiments, two adjacent cooling plates are in communication with each other.

In some embodiments, the joint of one of the cooling plates is connected with a plug.

In some embodiments, a buffer portion is provided inside a side of each cell away from the cooling plate.

In some embodiments, the buffer portion is made of elastic heat conductive material.

In some embodiments, the top and bottom of each cell are provided with a pressure relief valve, respectively.

A battery pack based on the same concept, comprising: the battery cell module comprises an upper cover, a lower cover and the battery cell module, wherein the battery cell module is arranged in an installation cavity formed by the upper cover and the lower cover.

In some embodiments, the top of each cooling plate is higher than the top of each battery cell, and is connected to the upper cover, and an upper pressure release cavity is formed between the adjacent sides of two adjacent cooling plates and the bottom surface of the upper cover.

In some embodiments, the bottom of each cooling plate is lower than the bottom of each battery cell, and is connected to the lower cover, and a lower pressure release cavity is formed between the adjacent sides of two adjacent cooling plates and the top surface of the lower cover.

The utility model has the beneficial effects that:

the cooling plate is arranged on one side of the battery cell unit, so that the wall thickness of the battery cell unit is reduced to realize light energy density improvement, and the cooling plate can be directly contacted with the electrode group and electrolyte in the battery cell unit, thereby improving the heat conduction performance, and meanwhile, the battery cell unit part can be protected by arranging the cooling plate.

Drawings

Figure 1 is a schematic diagram of some embodiments of a cell module according to the present utility model;

fig. 2 is a schematic view of an alternative view of one of the cell modules shown in fig. 1;

fig. 3 is a schematic view of an alternative view of one of the cell modules shown in fig. 1;

FIG. 4 is an enlarged schematic view at "A" shown in FIG. 3;

FIG. 5 is a schematic view of a mounting structure of the battery cell module shown in FIG. 1;

FIG. 6 is a second schematic diagram of the mounting structure of the battery module shown in FIG. 1;

FIG. 7 is a third schematic diagram of the mounting structure of the battery module shown in FIG. 1;

fig. 8 is a schematic view of the mounting structure of one of the cell modules of fig. 1 from another perspective;

FIG. 9 is an enlarged schematic view at "B" shown in FIG. 8;

fig. 10 is a schematic diagram of another view of the cell unit of one cell module shown in fig. 1.

In the drawings, 100, cell modules; 110. a cell unit; 200. a cooling plate; 210. a joint; 211. an inlet; 212. an outlet; 220. a blocking part; 300. an upper cover; 310. an upper pressure relief cavity; 400. a buffer section; 500. a lower cover; 500. and a lower pressure release cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, a battery cell module includes: a cell unit 110; a cooling plate 200 is provided at one side of the battery cell 110.

It should be noted that, since the end face of the battery cell unit 110 needs to be provided with elements such as a pole, one side of the battery cell unit 110 in the application is a side wall of the battery cell unit 110, after the arrangement position of the pole is changed, the end face can be provided with the cooling plate 200, and related design can be performed according to the heat dissipation requirement of the battery cell unit 110.

In some embodiments of the present utility model, a plurality of cell units 110 of the present application are stacked in sequence to form a cell module 100.

In some applications, the battery module 100 of the present application is a plurality of battery cells 110 stacked in series.

In other applications, the battery module 100 of the present application is a plurality of battery cells 110 stacked in series.

Wherein, the top and the bottom of each electric core unit 110 of this application are provided with the relief valve respectively.

Specifically, the side wall of the pressure release valve and the side wall of the cell module 100 can be subjected to high temperature protection, so that insulation or burning-through problem caused by ejected substances is avoided.

Based on the above embodiments, the adjacent cell units 110 in the present application may be in a bonding state, or bonded by a colloid, or separated by a buffer material, which is not limited herein, and may be any connection manner for sequentially stacking a plurality of cell units 110.

In some embodiments of the present utility model, the adjacent sides of two adjacent cells 110 are the cooling plates 200 of one of the cells 110.

Specifically, the side of the battery cell 110 with the cooling plate 200 and the side of the adjacent battery cell 110 far away from the cooling plate 200 are sequentially arranged and attached; the cooling plates 200 between the adjacent cell units 110 can cool the cell unit 110 body and the adjacent cell units 110 at the same time, thereby enhancing the cooling effect.

In some embodiments of the present utility model, the cooling plate 200 of each of the battery cells 110 of the present application is provided with a plurality of connectors 210, and a cooling passage is formed in the cooling plate 200, and each connector 210 is connected to the cooling passage, and the cooling passage is used for cooling the battery cells 110.

In some of these applications, the tabs 210 of the cooling plates 200 of at least one cell 110 of the present application communicate with the external interface of the cell module 100 for the ingress and egress of cooling medium.

In other applications, the joint 210 of at least one cooling plate 200 of the present application communicates with the joint 210 of an adjacent cooling plate 200, i.e., adjacent two cooling plates 200 communicate with each other.

Specifically, the connector 210 of the present application is provided with a plurality of inlets 211 and a plurality of outlets 212, and the plurality of inlets 211 and the plurality of outlets 212 are all communicated with the cooling passages, so that the communication between the cooling plates 200 of the adjacent battery cell units 110 is realized, and each battery cell unit 110 is ensured to be in contact with the cooling passages, thereby enhancing the cooling effect.

In some embodiments of the present utility model, the plug 220 is connected to the connector 210 of one of the cooling plates 200, and the present application plugs at least one cooling plate 200 in the battery module 100 by providing the plug 220 to form a cooling channel.

In some embodiments of the present utility model, a buffer 400 is disposed inside a side of each of the battery cells 110 away from the cooling plate 200, and the buffer 400 is used to absorb expansion of the battery cell 110 pole group during use.

In some applications, the buffer 400 is made of elastic heat conductive material, and can directly transfer heat.

In other applications, the buffer portion 400 is disposed inside the battery cell 110, so that the use of corresponding adhesive materials can be reduced, and the temperature can be transferred to the periphery of the battery cell 110 through the housing when the buffer portion contacts the cooling plate 200 of the adjacent battery cell 110, and then transferred to the pole group inside the battery cell 110 to realize temperature control.

The present application also provides a battery pack comprising: the upper cover 300, the lower cover 500 and the battery cell 110 module 100 as described above, the battery cell 110 module 100 is mounted in the mounting cavity formed by the upper cover 300 and the lower cover 500.

Wherein, the cooling plate 200 of this application sets up in the one side of electric core monomer 110 for electric core monomer 110 main part wall thickness reduces and realizes light-weighted energy density and promotes, and cooling plate 200 can be direct with electric core monomer 110 inside utmost point group and electrolyte contact, thereby promotes heat conductivility, can protect electric core monomer 110 main part through setting up cooling plate 200 simultaneously.

In some applications, the top of each cooling plate 200 is higher than the top of each cell 110, and is connected to the upper cover 300, and an upper pressure release cavity 310 is formed between the adjacent sides of two adjacent cooling plates 200 and the bottom surface of the upper cover 300.

In other applications, the bottom of each cooling plate 200 is higher than the bottom of each cell 110, and is connected to the lower cover 500, and a lower pressure relief cavity 500 is formed between the adjacent sides of two adjacent cooling plates 200 and the top surface of the lower cover 300.

Specifically, the upper cover 300 and the lower cover 500 of the application form an installation cavity, the battery cell unit 110 is provided with the cooling plate 200, at least one direction of the cooling plate 200 protrudes out of the battery cell unit 110, and the battery cell unit is adhered to or connected with the upper cover 300 or the lower cover 500 in other fixing modes, so that the cooling plate 200 can play a supporting role, the battery cell unit 110 and the electrode group inside the battery cell unit 110 are prevented from being damaged, the use safety is ensured, meanwhile, the edge cavity of the cooling plate 200 is isolated from a cooling passage, and the edge damage cannot influence the sealing performance of the cooling passage.

Further, the cooling plate 200, the upper cover 300 and the lower cover 500 of the application respectively form the upper pressure release cavity 310 and the lower pressure release cavity 500, and under the state that the pressure release valve of the battery cell 110 is opened in abnormal control, the cooling plate 200 of the battery cell 110 body, the cooling plate 200 of the battery cell 110 adjacent to the battery cell 110, the side wall of the battery cell 110 where the pressure release valve is located, and the upper cover 300 and the lower cover 500 can discharge substances to two sides of the arrangement direction of the battery cell 110 along the channel without affecting other battery cell 110 except the battery cell 110 adjacent to further ensure the system safety.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," 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 the utility model. In this specification, schematic representations of terms 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 present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.

Claims

1. A battery cell module, comprising: a cell unit;

a cooling plate is arranged on one side of the battery cell unit;

the plurality of battery cell monomers are stacked in sequence to form the battery cell module;

the adjacent sides of the adjacent two battery cell monomers are the cooling plates of one battery cell monomer.

2. The battery cell module of claim 1, wherein a plurality of connectors are provided on the cooling plate of each battery cell, a cooling passage is formed in the cooling plate, each connector is in communication with the cooling passage, and at least one connector of the cooling plate of at least one battery cell is in communication with an external interface of the battery cell module.

3. The battery cell module of claim 2, wherein two adjacent cooling plates are in communication with each other.

4. The battery cell module of claim 2, wherein the connector of one of the cooling plates is connected with a plug.

5. The battery cell module of claim 1, wherein a buffer is provided inside a side of each of the battery cells remote from the cooling plate.

6. The battery cell module of claim 5, wherein the buffer is an elastic thermally conductive material.

7. The battery cell module of claim 1, wherein the top and bottom of each battery cell are respectively provided with a pressure relief valve.

8. A battery pack, comprising: an upper cover, a lower cover and a cell module according to any one of claims 1-7, said cell module being mounted in a mounting cavity formed by said upper cover and said lower cover.

9. The battery pack according to claim 8, wherein the top of each cooling plate is higher than the top of each cell, and is connected to the upper cover, and an upper pressure release cavity is formed between the adjacent sides of two adjacent cooling plates and the bottom surface of the upper cover.

10. The battery pack according to claim 9, wherein the bottom of each cooling plate is lower than the bottom of each cell, and is connected to the lower cover, and a lower pressure release cavity is formed between the adjacent sides of two adjacent cooling plates and the top surface of the lower cover.