CN220041983U - Battery module and battery pack - Google Patents

Abstract

The utility model discloses a battery module and a battery pack, and relates to the technical field of new energy. The battery module comprises a plurality of battery cells, wherein the battery cells are internally provided with a partition plate, the battery cells are internally divided into a first cavity and a second cavity through the partition plate, electrolyte is arranged in the first cavity, the battery cells are soaked in the electrolyte, joints are arranged on two opposite sides of each battery cell, the battery cells are sequentially stacked, and the second cavities of two adjacent battery cells are communicated through the joints to jointly form a liquid cooling channel for cooling liquid circulation. The battery module and the battery pack can solve the problems of high cost, heavy weight, low energy density, low heat conduction efficiency and low production efficiency of the conventional liquid cooling scheme in the prior art.

Description

Battery module and battery pack

Technical Field

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

Background

The lithium battery needs to be fully developed at a reasonable temperature to ensure the performance, and the cooling system of the lithium battery in the market at present generally adopts air cooling or liquid cooling. The conventional liquid cooling scheme is to install an integral liquid cooling plate at the bottom of the battery pack, or install a small liquid cooling plate at the bottom of each battery module, and then connect the small liquid cooling plates in series.

The conventional liquid cooling scheme mainly has the following problems: the liquid cooling plate is used as an independent part, special manufacturing is needed, the cost is high, and the whole battery pack is occupied with more weight; in order to improve the heat conduction efficiency between the battery cell and the liquid cooling plate, heat conduction glue is required to be adhered between the battery cell and the liquid cooling plate, and the heat conduction glue is high in price and heavy, so that the energy density of the whole battery pack can be reduced; after the battery module is stacked, a special station for gluing is needed, and the gluing machine is used for gluing, so that the production line is high in cost and low in production efficiency.

Disclosure of Invention

The utility model aims to provide a battery module and a battery pack, which can solve the problems of high cost, heavy weight, low energy density, low heat conduction efficiency and low production efficiency of a conventional liquid cooling scheme in the prior art.

Embodiments of the present utility model are implemented as follows:

according to a first aspect of the embodiment of the utility model, a battery module is provided, the battery module comprises a plurality of battery cells, a partition board is arranged in each battery cell, the battery cells are divided into a first cavity and a second cavity through the partition board, electrolyte and a winding core immersed in the electrolyte are arranged in each first cavity, connectors are arranged on two opposite sides of each battery cell, the battery cells are stacked in sequence, and the second cavities of two adjacent battery cells are communicated through the connectors to jointly form a liquid cooling channel for cooling liquid circulation. The battery module can solve the problems of high cost, heavy weight, low energy density, low heat conduction efficiency and low production efficiency of the conventional liquid cooling scheme in the prior art.

Optionally, the battery cell also comprises a shell, wherein a plurality of battery cells are arranged in the shell, through holes are formed in two opposite sides of the shell, a liquid inlet pipe of the liquid cooling pipeline penetrates through one through hole to be communicated with a connector of the battery cell facing one side of the shell, and a liquid outlet pipe penetrates through the other through hole to be communicated with a connector of the battery cell facing the other side of the shell.

Optionally, the casing includes front end plate, left side board, rear end plate and the right side board that connect gradually, a plurality of electric core is followed the front end plate with the line direction of rear end plate stacks gradually and sets up, two connect and is located respectively on the big face of electric core, two the via hole is located respectively on the front end plate with the rear end plate.

Optionally, the casing still include the periphery respectively with the front end plate left side board back end plate with the bottom plate that the right side board is connected, a plurality of electric core stack in proper order set up in on the bottom plate and press from both sides tightly in front end plate left side board back end plate with between the right side board.

Optionally, the via and the tab are positively corresponding in the stacking direction.

Optionally, the connector is located at the center of the length direction of the battery cell.

Optionally, the planes formed by the separator and the length direction and the width direction of the battery cell are parallel to each other.

Optionally, the first chamber is located directly above the second chamber along the height direction of the battery cell.

Optionally, the battery pack further comprises a CCS component, and a plurality of the battery cells are connected in series or in parallel through the CCS component.

In a second aspect of the embodiment of the present utility model, a battery pack is provided, including the battery module described above. The battery module can solve the problems of high cost, heavy weight, low energy density, low heat conduction efficiency and low production efficiency of the conventional liquid cooling scheme in the prior art.

The beneficial effects of the embodiment of the utility model include:

the battery module comprises a plurality of battery cells, wherein the battery cells are internally provided with a partition plate, the battery cells are internally divided into a first cavity and a second cavity through the partition plate, electrolyte is arranged in the first cavity, the battery cells are soaked in the electrolyte, joints are arranged on two opposite sides of each battery cell, the battery cells are sequentially stacked, and the second cavities of two adjacent battery cells are communicated through the joints to jointly form a liquid cooling channel for cooling liquid circulation. Compared with the conventional liquid cooling scheme in the prior art, the battery cell provided by the utility model adopts a double-chamber (namely the first chamber and the second chamber) design, so that a liquid cooling plate and heat conduction glue in the conventional liquid cooling scheme can be omitted, the overall weight of the battery module is reduced, the energy density of the battery module is improved, a glue spraying process (comprising a glue spraying station and a glue spraying machine required by a production line) can be omitted in production, the manufacturing cost of the battery module is reduced, the production efficiency of the battery module is improved, and in addition, a liquid cooling channel (namely the second chamber) for circulating cooling liquid is directly integrated in the battery cell and is completely attached to the first chamber for ensuring normal charge and discharge of the battery cell (can directly conduct heat conduction), so that the heat conduction efficiency of the battery cell is also improved, and the temperature regulation requirement of rapid heat dissipation is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present utility model;

fig. 2 is an exploded view of a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model;

FIG. 4 is a second schematic diagram of a battery cell according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view of fig. 4.

Icon: 100-battery module; 110-cell; 111-separator; 112-a first chamber; 113-a second chamber; 114-linker; 120-a housing; 121-a front end plate; 122-left side panel; 123-a rear end plate; 124-right side plate; 125-a bottom plate; 126-vias; 130-CCS component; a-length direction; b-width direction; c-height direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be connected between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 5 in combination, the embodiment of the utility model provides a battery module 100, which includes a plurality of battery cells 110, wherein a partition board 111 is disposed inside each battery cell 110, so that the battery cell 110 is divided into a first chamber 112 and a second chamber 113 by the partition board 111, an electrolyte and a winding core immersed in the electrolyte are disposed in the first chamber 112, connectors 114 are disposed on opposite sides of each battery cell 110, the plurality of battery cells 110 are stacked in sequence, and the second chambers 113 of two adjacent battery cells 110 are communicated through the connectors 114 to jointly form a liquid cooling channel for cooling liquid circulation. The battery module 100 can solve the problems of high cost, heavy weight, low energy density, low heat conduction efficiency and low production efficiency of the conventional liquid cooling scheme in the prior art.

It should be noted that, as shown in fig. 1, 2 and 5, the battery module 100 includes a plurality of battery cells 110, and a partition 111 is disposed inside each battery cell 110 to divide the inside of the battery cell 110 into a first chamber 112 and a second chamber 113 through the partition 111, and the first chamber 112 and the second chamber 113 are independent and do not interfere with each other. As shown in fig. 5, the first chamber 112 is provided with an electrolyte (not shown in the drawing) and a winding core (not shown in the drawing) immersed in the electrolyte, so that the battery cell 110 can be charged and discharged normally through the first chamber 112, and the second chamber 113 is used for forming a liquid cooling channel through which a cooling liquid flows in a matching manner, so that the battery cell 110 is cooled by the second chamber 113.

Specifically, as shown in fig. 2 to 5, the opposite sides of the battery cells 110 are provided with connectors 114, and in the actual production process, it is necessary to sequentially stack a plurality of battery cells 110, and simultaneously, communicate the second chambers 113 of two adjacent battery cells 110 through the connectors 114. Therefore, the second chambers 113 of the plurality of electric cells 110 can jointly form a liquid cooling channel for flowing cooling liquid, so that the external liquid cooling pipeline can convey the cooling liquid into the liquid cooling channel, and when the cooling liquid flows in the liquid cooling channel, the cooling liquid can play a liquid cooling function on the electric cells 110, thereby realizing temperature adjustment on the electric cells 110 and ensuring that the service performance of the battery is optimal.

Compared with the conventional liquid cooling scheme in the prior art, the battery cell 110 provided by the utility model adopts the double-chamber (namely the first chamber 112 and the second chamber 113) design, so that a liquid cooling plate and heat conducting glue in the conventional liquid cooling scheme can be omitted, the overall weight of the battery module 100 is reduced, the energy density of the battery module 100 is improved, a glue spraying process (comprising a glue spraying station and a glue spraying machine required by a production line) can be omitted in production, the manufacturing cost of the battery module 100 is reduced, the production efficiency of the battery module 100 is improved, and in addition, a liquid cooling channel (namely the second chamber 113) for cooling liquid circulation is directly integrated inside the battery cell 110 and is fully attached to the first chamber 112 for ensuring normal charge and discharge of the battery cell 110 (can directly conduct heat conduction), so that the heat conduction efficiency of the battery cell 110 can be improved, and the temperature regulation requirement of rapid heat dissipation can be realized.

As shown in fig. 1, in this embodiment, the battery module 100 further includes a housing 120, where the plurality of electric cells 110 are disposed in the housing 120 to protect and limit the electric cells 110 through the housing 120, through holes 126 are disposed on two opposite sides of the housing 120, a liquid inlet pipe (not shown in the drawing) of an external liquid cooling pipeline is connected to the connector 114 of the electric cell 110 facing one side of the housing 120 through one through hole 126, and a liquid outlet pipe (not shown in the drawing) is connected to the connector 114 of the electric cell 110 facing the other side of the housing 120 through another through hole 126, so that the external liquid cooling pipeline can convey the cooling liquid into the liquid cooling channel, thereby performing a liquid cooling function on the electric cell 110 through the cooling liquid.

Specifically, as shown in fig. 2, in the present embodiment, the housing 120 includes a front end plate 121, a left side plate 122, a rear end plate 123, and a right side plate 124 that are sequentially connected, the plurality of electric cells 110 are sequentially stacked along a connection line direction of the front end plate 121 and the rear end plate 123 (or a width direction b of the electric cell 110), two connectors 114 are respectively located on a large surface of the electric cell 110, and two through holes 126 are respectively located on the front end plate 121 and the rear end plate 123, so that a cooling liquid is introduced into the liquid cooling channel.

In addition, as shown in fig. 2, in the present embodiment, the housing 120 further includes a bottom plate 125 with a peripheral edge connected to the front end plate 121, the left side plate 122, the rear end plate 123 and the right side plate 124, and the plurality of cells 110 are stacked on the bottom plate 125 in sequence and clamped between the front end plate 121, the left side plate 122, the rear end plate 123 and the right side plate 124, so as to support the cells 110 through the bottom plate 125, and avoid the expansion of the cells 110 through the front end plate 121, the left side plate 122, the rear end plate 123 and the right side plate 124.

Preferably, as shown in fig. 2, the via 126 corresponds to the connector 114 in the stacking direction, so that the liquid inlet pipe and the liquid outlet pipe of the external liquid cooling pipeline are connected to the connectors 114 of the two outermost electric cores 110 respectively.

Preferably, as shown in fig. 4, the joint 114 is located at the center of the length direction a of the battery cell 110, so that the cooling liquid can uniformly act on the first chamber 112 along the length direction a of the battery cell 110, thereby ensuring that the first chambers 112 located at the left and right sides of the center line of the length direction a of the battery cell 110 can uniformly dissipate heat, and avoiding that the temperature at one side is higher.

In this embodiment, as shown in fig. 5, the planes formed by the separator 111 and the length direction a and the width direction b of the battery cells 110 are parallel to each other, so that the first chamber 112 can be located directly above the second chamber 113 in the height direction c of the battery cells 110, so as to ensure that the serial-parallel connection of the plurality of battery cells 110 can not be affected.

As shown in fig. 1 and 2, in the present embodiment, the battery module 100 further includes a CCS assembly 130 (i.e. an integrated busbar), and the plurality of battery cells 110 are connected in series or in parallel through the CCS assembly 130, so as to ensure that the battery module 100 can be charged and discharged normally, thereby ensuring normal use of the battery pack.

The embodiment of the utility model also provides a battery pack, which comprises the battery module 100. Since the structure and the advantageous effects of the battery module 100 have been described in detail in the foregoing embodiments, the description thereof is omitted herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a battery module, its characterized in that includes a plurality of electric cores, the inside baffle that is provided with of electric core, with pass through the baffle will electric core internal partition is first cavity and second cavity, be provided with electrolyte in the first cavity and soak in the interior book core of electrolyte, the relative both sides of electric core are provided with the joint, and a plurality of electric core stacks gradually and sets up, and adjacent two electric core's second cavity passes through connect the intercommunication in order to jointly form the liquid cooling passageway that is used for the coolant circulation.

2. The battery module of claim 1, further comprising a housing, wherein a plurality of the cells are disposed in the housing, wherein vias are disposed on opposite sides of the housing, wherein a liquid inlet tube of the liquid cooling line is connected to a connector of the cell toward one side of the housing through one of the vias, and a liquid outlet tube is connected to a connector of the cell toward the other side of the housing through the other of the vias.

3. The battery module according to claim 2, wherein the housing includes a front end plate, a left side plate, a rear end plate, and a right side plate, which are sequentially connected, the plurality of battery cells are sequentially stacked in a line direction of the front end plate and the rear end plate, two of the connectors are respectively located on a large surface of the battery cells, and two of the through holes are respectively located on the front end plate and the rear end plate.

4. The battery module according to claim 3, wherein the case further includes a bottom plate having peripheral edges connected to the front end plate, the left side plate, the rear end plate, and the right side plate, respectively, and the plurality of battery cells are stacked in order on the bottom plate and clamped between the front end plate, the left side plate, the rear end plate, and the right side plate.

5. The battery module according to claim 2, wherein the via hole positively corresponds to the tab in the stacking direction.

6. The battery module according to claim 2, wherein the tab is located at the center of the battery cell in the length direction.

7. The battery module according to claim 1, wherein planes formed by the separators together with the longitudinal direction and the width direction of the battery cells are parallel to each other.

8. The battery module of claim 7, wherein the first chamber is located directly above the second chamber in a height direction of the battery cell.

9. The battery module of claim 1, further comprising a CCS assembly through which a plurality of the cells are connected in series or in parallel.

10. A battery pack comprising the battery module according to any one of claims 1 to 9.