CN218849693U

CN218849693U - Battery cell module

Info

Publication number: CN218849693U
Application number: CN202223223933.6U
Authority: CN
Inventors: 何亚飞; 张毛毛
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-04-11
Anticipated expiration: 2032-12-01

Abstract

The utility model belongs to the technical field of batteries, and discloses an electric core module, which comprises an electric core stacked body and a cooling plate, wherein the electric core stacked body is formed by arranging a plurality of single electric cores along a first direction; the cooling plate comprises a liquid inlet, a liquid outlet, a first cooling plate, a second cooling plate and a third cooling plate, wherein the first cooling plate, the second cooling plate and the third cooling plate are arranged around three circumferential surfaces of the battery cell stacking body; the coolant liquid flows into from the inlet, flows out through the liquid outlet, can cool off the terminal surface and the opposite flank of electric core pile body. The utility model discloses a trilateral high-efficient heat transfer of electric core stack body can be realized to the cooling plate, has promoted heat exchange efficiency, satisfies the cooling demand of battery high magnification charge-discharge, and the cooling plate can also carry on spacingly to and the side direction the end of electric core stack body, has saved the installation of module curb plate for the integrated level of electric core subassembly, in groups efficiency are higher, do benefit to the energy density and the structural strength who promote electric core module.

Description

Battery cell module

Technical Field

The utility model relates to a battery technology field especially relates to an electricity core module.

Background

With the rapid development of electric vehicles, the requirements for energy density and safety of battery modules are higher and higher. Current battery cooling plate is mostly big plane platelike structure, often is located the bottom or the top of battery module, and its cooling efficiency is low, the space accounts for than big, efficiency is poor in groups, and current battery module is often with end plate and curb plate welded fastening, and battery module integration degree is poor, and electric core easily receives welding heat and influences, along with electric core cycle life's increase, when electric core inflation or vibratory impulse, end plate and curb plate welding seam department are easy to crack and are become invalid, and battery module overall structure intensity can not be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity core module to solve the poor, the poor problem of battery module integrated level, structural strength of cooling plate heat exchange efficiency.

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

provided is a cell module including:

the battery cell stacking body is formed by arranging a plurality of single battery cells along a first direction;

the cooling plate comprises a liquid inlet, a liquid outlet, and a first cooling plate, a second cooling plate and a third cooling plate which are arranged around three circumferential surfaces of the battery cell stacking body; the coolant liquid certainly the inlet flows in, the warp the liquid outlet flows out, can be to the terminal surface and the opposite flank cooling of electric core pile body.

Optionally, the battery stack body is provided with a plurality of groups, and the plurality of groups of battery stack body is arranged along the second direction interval, and between two adjacent groups of battery stack body, at least one group of battery stack body is installed the cooling plate.

Optionally, the battery cell module further includes a bottom plate, the battery cell stacking body is mounted on the bottom plate, and the cooling plate is connected with the battery cell stacking body through a connecting member.

Optionally, the distance between the third cooling plate and the end face of the cell stack body is a, and a is greater than 4mm.

Optionally, the connector comprises a plastic rivet.

Optionally, the cell module further comprises a binding band, which is sleeved on the cell stack.

Optionally, the strap is spaced from the cooling plate by a distance b > 2mm.

Optionally, the bottom plate is provided with a first assembly hole, the cell stack body comprises an end plate, and a first fastener penetrates through the end plate to be connected with the first assembly hole.

Optionally, the base plate is provided with a second assembly hole, and a second fastener passes through the second assembly hole to be connected with the frame.

Optionally, the first cooling plate and the second cooling plate are connected to the cell stack body through bonding members.

The utility model has the advantages that:

the utility model discloses a cooling plate is including the first cooling plate that communicates each other, second cooling plate and third cooling plate, the cooling plate suit is on electric core stack body, can realize the trilateral high-efficient heat transfer of electric core stack body, heat exchange efficiency has been promoted, satisfy the cooling demand of battery high magnification charge-discharge, the cooling plate can also carry on spacingly to and the side direction to the end of electric core stack body, the installation of module curb plate has been saved, make the integrated level of electric core subassembly, it is higher to efficiency in groups, do benefit to the energy density and the structural strength who promote electric core module.

Drawings

Fig. 1 is a schematic diagram illustrating a battery cell stack and a cooling plate according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a cooling plate according to an embodiment of the present invention;

fig. 3 is an assembly diagram of a battery cell stack and a cooling plate according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a structure split of a battery cell module according to an embodiment of the present invention;

fig. 5 is a top view of a cell module according to an embodiment of the present invention;

FIG. 6 is an enlarged partial schematic view at A of FIG. 5;

fig. 7 is a side view of a cell module according to an embodiment of the present invention;

fig. 8 is a partially enlarged schematic view at B in fig. 7.

In the figure:

1. a cell stack body; 11. an end plate;

2. a cooling plate; 21. a first cooling plate; 211. a liquid inlet; 22. a second cooling plate; 221. a liquid outlet; 23. a third cooling plate; 24. a pipeline; 25. a connecting member;

3. a base plate; 31. a first assembly hole; 32. a second assembly hole;

4. and (4) binding the bands.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specifically stated or limited, the terms "connected," "connected," and "fixed" are to be understood broadly, and may include, for example, a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not in direct contact, but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

As shown in fig. 1-8, the present invention provides a battery cell module, which includes a battery cell stack 1 and a cooling plate 2, as shown in fig. 1 and 2, the X direction shown in fig. 1 is a first direction, the Y direction is a second direction, and the battery cell stack 1 of this embodiment is formed by arranging a plurality of single battery cells along the first direction; the cooling plate 2 overall structure is the U type, and it is including can be to the first cooling plate 21 of electric core stack 1 opposite flank refrigerated, second cooling plate 22 to and can be to the third cooling plate 23 of electric core stack 1 terminal surface cooling, cooling plate 2 in this embodiment is integrated into one piece spare, first cooling plate 21, second cooling plate 22, third cooling plate 23 communicate each other, the inside circulation has the coolant liquid, optionally, the inlet 211 of coolant liquid sets up on first cooling plate 21, the outlet 221 of coolant liquid sets up on second cooling plate 22. 2 suit of cooling plate of this embodiment are on electric core stack body 1, can carry out the heat transfer cooling to electric core stack body 1's opposite flank and a terminal surface, increase cooling plate 2 and electric core stack body 1's area of contact, realize the 1 trilateral high-efficient heat transfer of electric core stack body, heat exchange efficiency has been promoted, satisfy the cooling demand of the high multiplying power charge-discharge of battery, furthermore, cooling plate 2 can play the module casing effect, cooling plate 2 of U type can also be spacing to the end of electric core stack body 1 and the side direction, the installation of module curb plate has been saved, electric core subassembly integrated level is high, it is efficient in groups, the risk of module curb plate welding fracture has been reduced, do benefit to the energy density and the structural strength who promote electric core module.

Optionally, electric core stack body 1 is provided with the multiunit, and multiunit electric core stack body 1 is along second direction interval arrangement, and cooling plate 2 is installed to at least a set of electric core stack body 1 between adjacent two sets of electric core stack body 1. As shown in fig. 1 and fig. 3, this embodiment uses an assembly manner that three groups of cell stack bodies 1 share two cooling plates 2 as an example, the three groups of cell stack bodies 1 are arranged at intervals along a Y direction shown in fig. 1, and in two adjacent groups of cell stack bodies 1, the cooling plates 2 are installed on one group of cell stack bodies 1, that is, the cooling plates 2 are sleeved on the two groups of cell stack bodies 1 at the outermost side in a one-to-one correspondence manner, liquid inlets 211 and liquid outlets 221 of two adjacent groups of cooling plates 2 are respectively connected through a pipeline 24, and the cooling liquid flows into the liquid inlet 211 of each cooling plate 2 through the pipeline 24 and is discharged from the liquid outlets 221 of each cooling plate 2 in a gathering manner. Two cooling plates 2 can cool off three sides of organizing electric core pile body 1 simultaneously in this embodiment, and cooling plate 2 sets up a small quantity, and the space accounts for than little, does benefit to the energy density that further promotes electric core module. In addition, the number of the cooling plates 2 can also be three, the cooling plates 2 are all sleeved on each group of the cell stacking body 1, the cell stacking body 1 can also be provided with a plurality of groups, including but not limited to three groups, the cell stacking body 1 and the cooling plates 2 are designed and selected according to actual conditions with the number of the groups, and the present embodiment preferably adopts an assembly mode that the three groups of the cell stacking bodies 1 share two cooling plates 2, including but not limited to the number shown in the drawings of the present embodiment.

Optionally, as shown in fig. 4 to 8, the battery cell module further includes a bottom plate 3, the battery cell stack body 1 is mounted on the bottom plate 3, and the cooling plate 2 is connected to the battery cell stack body 1 through a connecting member 25. The battery cell stacking body 1 and the cooling plate 2 are directly assembled on the bottom plate 3, the bottom plate 3 can be directly connected with the frame, the design of a lower battery box is omitted, and the integration level of the battery cell module is higher.

Specifically, as shown in fig. 4, the bottom surface of the cell stacked body 1 is bonded with the upper surface of the bottom plate 3 through glue, so that the connection strength is ensured, the first assembling hole 31 is formed in the bottom plate 3, the cell stacked body 1 comprises an end plate 11, a first fastener penetrates through the end plate 11 to connect the end plate 11 with the first assembling hole 31 in a threaded manner, the first fastener can be a bolt, the end plate 11 is locked with the first assembling hole 31 in the bottom plate 3, and the rapid assembly of the cell stacked body 1 and the bottom plate 3 is realized.

Specifically, as shown in fig. 4, the bottom plate 3 is provided with a second assembly hole 32, and the second fastening member passes through the second assembly hole 32 to be connected with the frame. Optionally, the second fastening member may be a long bolt, and the long bolt penetrates through the second assembling hole 32 to limit the bottom plate 3 to be mounted on the frame, so as to realize quick mounting of the bottom plate 3 and the frame.

Specifically, as shown in fig. 3, in this embodiment, the cooling plate 2 is connected with the cell stack body 1 through the connecting member 25, the connecting member 25 may specifically be a plastic rivet, the structural strength of the plastic rivet is weak, the plastic rivet is easily broken after the cell stack body 1 expands, the expansion stress of the cell stack body 1 can be released, so as to prevent the cell stack body 1 from being rigidly connected to the cooling plate 2, and the cell stack body 1 expands to cause cell damage.

Preferably, as shown in fig. 6, the third cooling plate 23 is spaced from the end face of the cell stack body 1 by a distance a, where a is greater than 4mm, so that a sufficient expansion space is left between the third cooling plate 23 and the end face of the cell stack body 1 to prevent the third cooling plate 23 from being pressed after the cell stack body 1 expands, which may cause failure of the cooling plate 2.

Optionally, the battery cell module further includes a binding band 4, as shown in fig. 7 and 8, the binding band 4 is sleeved on the battery cell stacking body 1, so that grouping of the battery cells is facilitated, and the expansion phenomenon of the battery cells generated in the charging and discharging process can be adapted. In this embodiment, two sets of straps 4 are sleeved on each battery cell stack 1, the cooling plate 2 is assembled between the two sets of straps 4, the distance between the straps 4 and the cooling plate 2 is b, and b is greater than 2mm, so as to reduce the interference between the cooling plate 2 and the straps 4.

Specifically, first cooling plate 21, second cooling plate 22 are connected through the bonding piece with electric core stack body 1, and the bonding piece specifically can be heat conduction structure glue to make first cooling plate 21, second cooling plate 22 can fully contact with electric core stack body 1, promote joint strength and heat transfer effect. Optionally, use fig. 4 as an example, the side coating that is located middle position department electric core stack body 1 has heat conduction structure to glue, and both sides are equipped with electric core stack body 1 of cooling plate 2 and draw close to the electric core stack body 1 of middle position department, ensure that cooling plate 2 can closely laminate with middle electric core stack body 1, promote heating cooling effect.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cell module, comprising:

2. The battery cell module of claim 1, wherein the battery cell stack body is provided with a plurality of groups, the plurality of groups of battery cell stack bodies are arranged at intervals along the second direction, and the cooling plate is installed on at least one group of battery cell stack bodies between two adjacent groups of battery cell stack bodies.

3. The battery cell module of claim 1, further comprising a base plate to which the stack of battery cells is mounted, the cooling plate being connected to the stack of battery cells by a connector.

4. The battery cell module of claim 3, wherein the third cooling plate is spaced a > 4mm from the end face of the stack of battery cells.

5. The cell module of claim 3, wherein the connector comprises a plastic rivet.

6. The battery cell module of claim 3, further comprising a strap that is sleeved to the stack of battery cells.

7. The cell module of claim 6, wherein the strap is spaced from the cooling plate by a distance b > 2mm.

8. The cell module according to any of claims 3 to 7, wherein the base plate is provided with a first assembly aperture, and the cell stack comprises an end plate through which a fastener is connected to the first assembly aperture.

9. The cell module according to any of claims 3-7, wherein the base plate is provided with a second assembly hole, and a second fastener passes through the second assembly hole to connect with the frame.

10. The cell module of any of claims 1 to 7, wherein the first cooling plate, the second cooling plate, and the stack of cells are connected by an adhesive.