CN219163548U - Battery cell module and battery pack - Google Patents

Abstract

The utility model relates to a battery cell module and a battery pack, wherein the battery cell module comprises a supporting part, a protecting part and a battery cell; the supporting part is provided with a plurality of battery core accommodating holes; the protection part is arranged at the bottom of the supporting part and is used for bearing the battery cell; the battery cells are multiple and are arranged in the battery cell accommodating holes in a one-to-one correspondence with the battery cell accommodating holes. The protection part can effectively improve the impact strength of the bottom of the battery cell module. Especially to the battery package that the relief valve set up in the bottom of electric core module and/or utmost point post setting are in the bottom of electric core module. The supporting part plays a supporting role on the protecting part. In the whole, the structural strength and the rigidity of the battery cell module and the battery pack are improved, the protection performance of the bottoms of the battery cell module and the battery pack is improved, and the vibration resistance of the battery pack is improved.

Description

Battery cell module and battery pack

Technical Field

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

Background

Currently, the arrangement forms of the cell modules in the battery pack are various. For a part of the battery cell modules, the polar posts and the pressure relief valves are arranged at the top of the battery cell modules; for the other part of the battery core modules, the positive and negative poles are arranged on the same side or two opposite sides of the battery core module, and correspondingly, the side of the battery core module provided with the poles is also provided with a pressure release valve. In addition, there are few pressure release valves of the cell module set up in the bottom of the cell module.

With the popularization of new energy automobiles, the frequent occurrence of spontaneous combustion phenomenon of batteries is divided into two types: first, due to the characteristics of the cell itself; second, due to external factors. With respect to external factors, various complex working conditions can be encountered in the running process of the new energy automobile. When the bottom of the battery pack is impacted, the bottom of the battery pack is easy to damage, and the battery core is damaged, so that the spontaneous combustion phenomenon of the battery is caused. This problem is particularly true for the cell modules with pressure relief valves at the bottom.

Therefore, how to reduce the possibility of damage to the battery cells when the bottom of the battery pack is impacted is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the problem that when the bottom of a battery pack is impacted, a battery cell is easy to damage, the utility model provides a battery cell module and the battery pack.

The utility model provides a battery cell module for realizing the purpose, which comprises a supporting part, a protecting part and a battery cell;

the supporting part is provided with a plurality of battery core accommodating holes;

the protection part is arranged at the bottom of the supporting part and is used for bearing the battery cell;

the battery cells are multiple and are arranged in the battery cell accommodating holes in a one-to-one correspondence with the battery cell accommodating holes.

In some embodiments, the support is generally square in shape, including transverse and longitudinal bulkheads;

the transverse baffles are uniformly distributed along the body width direction of the supporting part;

the plurality of longitudinal baffle plates are uniformly distributed along the length direction of the supporting part; each longitudinal partition passes through each transverse partition in turn.

In some embodiments, the bottom of each diaphragm plate and the bottom of each longitudinal diaphragm plate are respectively provided with a bottom bracket.

In some embodiments, the shoe is hollow.

In some embodiments, the upper portion of each diaphragm and each longitudinal diaphragm is a cell positioning portion, and the middle portion is a heat insulating portion.

In some embodiments, the guard includes a guard plate;

the protection plate is arranged at the bottom of the supporting part;

the protection plate is provided with a buffer bulge.

In some embodiments, the device further comprises a flexible circuit board;

the flexible circuit boards are arranged at the bottom of the supporting part and distributed along the body width direction of the supporting part; two ends of each flexible circuit board extend along the length direction of the supporting part respectively;

the protection part also comprises a supporting bar;

the support bars are distributed along the body width direction of the support part; both ends of each supporting bar extend along the length direction of the supporting part;

the top surface of every support bar is laminated with the bottom surface of a flexible line way board, and the bottom surface all is laminated with the top surface of guard plate.

In some embodiments, a pressure relief valve is arranged at the bottom of each cell;

and a pressure relief channel opposite to the pressure relief valve is formed between adjacent sides of every two support bars.

In some embodiments, the cooling device further comprises a cooling part;

the cooling part is paved at the top of the supporting part.

A battery pack based on the same conception comprises a frame and a battery cell module provided by any of the specific embodiments;

the frames are multiple and are sequentially connected to form a shell which is arranged on the periphery of the battery cell module in a surrounding mode.

The utility model has the beneficial effects that: the bottom of the battery cell module is additionally provided with the protection part, and the protection part is made of a high-strength metal material, so that the impact strength of the bottom of the battery cell module can be effectively improved. Especially to the battery package of relief valve setting in the bottom of electric core module and/or utmost point post setting in the bottom of electric core module, when the bottom of battery package suffered the striking, the guard portion can provide the amortization of high strength deformation and power, has improved the barrier propterty to electric core module bottom greatly for the electric core is difficult for suffering the damage, and then avoids the battery package spontaneous combustion phenomenon to take place, has improved the security of battery package. Through addding supporting part, the electric core holding hole can hold the electric core on the supporting part, has the function of adjusting the expansion deformation of electric core to play the supporting role to the guard part. Overall, the structure is compact, and is favorable for improving the structural strength and rigidity of the battery cell module and the battery pack, improving the protective performance of the bottoms of the battery cell module and the battery pack, and improving the vibration resistance of the battery pack.

Drawings

FIG. 1 is an exploded view of some embodiments of a battery pack according to the present utility model;

figure 2 is a schematic diagram of some embodiments of a cell module according to the present utility model;

figure 3 is a schematic view of another embodiment of a cell module according to the present utility model;

FIG. 4 is a schematic view of some embodiments of the longitudinal separator in the battery pack shown in FIG. 1;

fig. 5 is a schematic cross-sectional view of the longitudinal partition shown in fig. 4.

110, a support portion; 111. a diaphragm; 112. a longitudinal partition; 1121. a bottom support; 1122. a cell positioning part; 1123. a heat insulation part; 120. a protective part; 121. a protection plate; 1211. a buffer protrusion; 122. a support bar; 130. a battery cell; 140. a cooling part; 200. a housing; 310. and a pressure release valve.

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 and 3, a battery cell module includes a support portion 110, a protection portion 120 and a battery cell 130. The supporting portion 110 is provided with a plurality of accommodating holes for the battery cells 130. The protection portion 120 is disposed at the bottom of the supporting portion 110 and is used for carrying the battery cell 130. The plurality of battery cells 130 are arranged in the battery cell 130 accommodating holes in a one-to-one correspondence with the plurality of battery cell 130 accommodating holes.

In these embodiments, the protection portion 120 is added at the bottom of the battery cell module, and the protection portion 120 is made of a high-strength metal material, so as to effectively improve the impact strength of the bottom of the battery cell module. Especially to the battery package that relief valve 310 set up in the bottom of electric core module and/or utmost point post set up in the bottom of electric core module, when the bottom of battery package suffered the striking, guard 120 can provide the amortization of high strength deformation and power, has improved the barrier propterty to electric core module bottom greatly for electric core 130 is difficult for suffering the damage, and then avoids the battery package spontaneous combustion phenomenon to take place, has improved the security of battery package. By additionally arranging the supporting part 110, the accommodating hole of the battery cell 130 on the supporting part 110 can accommodate the battery cell 130, has the function of adjusting the expansion deformation of the battery cell 130, and plays a supporting role on the protecting part 120. Overall, the structure is compact, and is favorable for improving the structural strength and rigidity of the battery cell module and the battery pack, improving the protective performance of the bottoms of the battery cell module and the battery pack, and improving the vibration resistance of the battery pack.

In some embodiments of the present utility model, the support portion 110 is generally square porous and includes transverse and longitudinal spacers 111, 112. The number of diaphragm plates 111 is plural, and they are uniformly distributed along the body width direction of the support portion 110. The plurality of vertical spacers 112 are uniformly distributed along the length of the support portion 110. Each longitudinal partition 112 passes through each transverse partition 111 in turn. Each diaphragm 111 and each vertical partition 112 can isolate two adjacent cells 130, not only play a supporting role on the protecting part 120, but also form protection on a plurality of cell 130 monomers, so as to reduce the possibility of damaging the cells 130. Compared with the form of forming the supporting part 110 by perforating on the solid part, the weight of the supporting part 110 is effectively reduced, and the lightweight design of the battery cell module and the battery pack is facilitated.

Referring to fig. 2 and 4, in some embodiments of the present utility model, the bottom of each diaphragm 111 and the bottom of each longitudinal diaphragm 112 are respectively provided with a bottom bracket 1121, and the bottom bracket 1121 may have a flat plate shape, a trapezoid shape, or other shapes. When the shoe 1121 is flat, each diaphragm 111 and each longitudinal diaphragm 112 have a "T" shaped cross section (as shown in fig. 5). The collet 1121 effectively increases the contact area between the separator and the protection portion 120, and when the bottom of the battery pack is impacted, the protection portion 120 can be provided with a supporting force in a sufficient vertical direction, so as to further protect the bus bars, the flexible circuit board and the like, and avoid abnormal phenomena such as short circuit of the bus bars. Meanwhile, the acting force in the vertical direction can be effectively shared, and the protection part 120 is prevented from being cut and damaged due to overlarge local stress.

In some embodiments of the utility model, the shoe 1121 is hollow. In this way, the weight of the diaphragm 111 and the vertical partition 112 can be effectively reduced, and the weight of the battery cell module can be effectively reduced, so that the lightweight design of the battery cell module and the battery pack is facilitated.

In some of these applications, the outer surface of the shoe 1121 is coated with an insulating film, which serves as insulation.

In some embodiments of the present utility model, the diaphragm 111 and the longitudinal diaphragm 112 are hollow, which not only reduces the loss of raw materials and the manufacturing cost, but also effectively reduces the weight of the diaphragm 111 and the longitudinal diaphragm 112.

In some embodiments of the present utility model, the upper portion of each diaphragm 111 and each longitudinal diaphragm 112 is a positioning portion 1122 of the battery cell 130, and the middle portion is a heat insulation portion 1123. The positioning portion 1122 of the battery cell 130 is used for assisting the battery cell 130 in positioning and mounting. The heat insulating portion 1123 is made of a heat insulating material. When spontaneous combustion occurs in one of the cells 130, the separator separates two adjacent cells 130, so as to prevent spontaneous combustion of the cells 130 from other normal cells 130. In addition, the battery cell 130 generates a large amount of heat during the charge and discharge processes. The heat insulation portion 1123 can prevent heat transfer between the battery cells 130 from causing overheating of the inside of the battery cell module. According to actual needs, the device can have the functions of cooling, temperature equalization and the like.

In some embodiments of the present utility model, the diaphragm 111 and the longitudinal diaphragm 112 are sized according to the size of the cell 130, as shown in fig. 5, the ratio of b value to the width of the cell 130 is 1/8-1/5, and the ratio of c value to b value is 1/4-1/2. The ratio of d value to c value is 2/3-1, the ratio of e value to d value is 1/2-1, the ratio of f value to e value is 4-8,g and the ratio of e value is 1/3-1/2. The supporting part 110 and the battery cell 130 can be connected in an adhesive mode, and compared with other modes, the fixing mode has lighter weight and simpler production process.

Referring to fig. 4, in some embodiments of the present utility model, the guard portion 120 includes a guard plate 121, and the guard plate 121 is disposed at the bottom of the support portion 110. The shielding plate 121 is provided with a buffering protrusion 1211. The buffer protrusions 1211 may be made of a soft foam material, and the buffer protrusions 1211 can play a role in shock absorption when the bottom of the battery cell module is impacted. Meanwhile, since the bus bar and the flexible circuit board are provided between the battery cell 130 and the shielding plate 121, the buffer protrusions 1211 can shield the bus bar and the flexible circuit board from being formed.

In some embodiments of the utility model, the cell module further comprises a flexible circuit board. The flexible circuit board is a plurality of, all sets up in the bottom of supporting part 110, distributes along the body width direction of supporting part 110, and the both ends of every flexible circuit board extend along the body length direction of supporting part 110 respectively. The guard 120 also includes a support bar 122. The support bars 122 are plural and distributed along the body width direction of the support portion 110, and two ends of each support bar 122 extend along the body length direction of the support portion 110. The top surface of each support bar 122 is attached to the bottom surface of one flexible circuit board. The support bar 122 is formed of a flexible circuit board protective cover and a battery cell 130 protective cover. Specifically, the protective cover of the flexible circuit board is made of an insulating material and is used for protecting the flexible circuit board, so that the battery can work normally due to poor contact and other reasons caused by the outside or self reasons. The mounting holes are formed in the flexible circuit board protective cover and are matched with the battery cell 130 protective cover, so that the plane of the flexible circuit board protective cover and the plane of the battery cell 130 protective cover are in the same horizontal plane, and the whole occupied space of the battery cell module is reduced.

In some embodiments of the present utility model, a pressure relief valve 310 is provided at the bottom of each cell 130. A relief channel is formed between adjacent sides of the support bars 122 opposite the relief valve 310. When the battery cell 130 is exploded due to the high-temperature gas generated inside during the use process, the high-temperature gas is discharged from the pressure release channel after flowing through the pressure release valve 310, so that the reliability of the battery pack is effectively provided.

In some embodiments of the present utility model, the battery cell module further includes a cooling portion 140, and the cooling portion 140 is laid on top of the supporting portion 110. Specifically, the cooling unit 140 is a liquid cooling plate. Because the electric core 130 generates a large amount of heat in the charge and discharge process, the cooling portion 140 can cool the electric core 130, so that the electric core 130 is cooled, and meanwhile, the cooling portion 140 has a temperature equalizing and supporting function.

Referring to fig. 1, the present utility model further provides a battery pack, including a frame and a battery cell module provided by any of the foregoing embodiments. The frames are multiple and are sequentially connected to form a shell 200 which is arranged on the periphery of the battery cell module.

In these embodiments, the protection portion 120 is additionally arranged at the bottom of the battery cell module, and the protection portion 120 is made of a high-strength metal material, so that the impact strength of the bottom of the battery cell module can be effectively improved. Especially to the battery package that relief valve 310 set up in the bottom of electric core module and/or utmost point post set up in the bottom of electric core module, when the bottom of battery package suffered the striking, guard 120 can provide the amortization of high strength deformation and power, has improved the barrier propterty to electric core module bottom greatly for electric core 130 is difficult for suffering the damage, and then avoids the battery package spontaneous combustion phenomenon to take place, has improved the security of battery package. By additionally arranging the supporting part 110, the accommodating hole of the battery cell 130 on the supporting part 110 can accommodate the battery cell 130, has the function of adjusting the expansion deformation of the battery cell 130, and plays a supporting role on the protecting part 120. Overall, the structure is compact, and is favorable for improving the structural strength and rigidity of the battery cell module and the battery pack, improving the protective performance of the bottoms of the battery cell module and the battery pack, and improving the vibration resistance of the battery pack. When the thermal runaway phenomenon occurs in the battery cell 130, high-temperature gas can be released from the pressure release channel. The battery pack has the advantages of relatively light overall weight, low manufacturing cost and simple manufacturing process, and can greatly shorten the performance verification period of the battery pack.

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 (10)

1. A battery cell module, comprising:

the battery cell comprises a supporting part, a protecting part and a battery cell;

the supporting part is provided with a plurality of battery cell accommodating holes;

the protection part is arranged at the bottom of the supporting part and is used for bearing the battery cell;

the battery cells are arranged in the battery cell accommodating holes in a one-to-one correspondence with the battery cell accommodating holes.

2. The cell module of claim 1, wherein the support is generally square in shape and comprises a transverse separator and a longitudinal separator;

the transverse baffles are multiple and are uniformly distributed along the body width direction of the supporting part;

the plurality of longitudinal baffles are uniformly distributed along the length direction of the supporting part; each longitudinal baffle plate sequentially passes through each transverse baffle plate.

3. The battery cell module of claim 2, wherein the bottom of each diaphragm plate and the bottom of each longitudinal diaphragm plate are respectively provided with a shoe.

4. The battery cell module of claim 3, wherein the shoe is hollow.

5. The cell module of claim 2, wherein the upper portion of each of the transverse and longitudinal spacers is a cell positioning portion and the middle portion is a heat insulating portion.

6. The cell module of any one of claims 1 to 5, wherein the guard comprises a guard plate;

the protection plate is arranged at the bottom of the supporting part;

and a buffer bulge is arranged on the protection plate.

7. The battery cell module of claim 6, further comprising a flexible circuit board;

the flexible circuit boards are arranged at the bottom of the supporting part and distributed along the body width direction of the supporting part; two ends of each flexible circuit board extend along the length direction of the supporting part;

the protection part also comprises a supporting bar;

the support bars are distributed along the body width direction of the support part; both ends of each supporting bar extend along the length direction of the supporting part;

the top surface of every the support bar is laminated with the bottom surface of one flexible line way board, and the bottom surface all with the top surface laminating of guard plate.

8. The cell module of claim 7, wherein a pressure relief valve is provided at the bottom of each cell;

and a pressure relief channel corresponding to the pressure relief valve is formed between adjacent sides of every two supporting strips.

9. The battery cell module of any one of claims 1 to 5, further comprising a cooling portion;

the cooling part is laid on the top of the supporting part.

10. A battery pack comprising a frame and the cell module of any one of claims 1 to 9;

the frames are connected in sequence to form a shell which is arranged on the periphery of the battery cell module in a surrounding mode.

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