Battery module

Abstract

The utility model provides a battery module, and relates to the technical field of batteries. The battery module comprises a box body, a plurality of battery cells, a water cooling piece, a mica plate and a busbar, the plurality of battery cells are arranged in the accommodating groove of the box body, so that the plurality of battery cells can be fixed in the accommodating groove of the box body, and the box body can play a role in protecting the battery cells. The water cooling piece is arranged in the box body and is in contact with any one battery cell, so that heat generated by the battery cell can be conducted to the water cooling piece to dissipate heat of the battery cell. The mica plate is stacked on the box body so that the mica plate can be fixed on the box body, the busbar is stacked on the mica plate so that the busbar can be relatively fixed with the box body through the mica plate, and the busbar is electrically connected with the plurality of battery cells so that the plurality of battery cells can be connected in series. Therefore, additional structural members for bearing and mounting the busbars do not need to be arranged, so that the number of parts of the battery module is relatively less, and the preparation cost is relatively lower.

Description

Technical Field

[0001] The present application relates to a battery module, belonging to the technical field of batteries. Background Art

[0002] A battery module is a battery device that can integrate multiple battery cells. Multiple battery cells connected in series and parallel can provide greater power, and have the advantages of high integration and high structural stability. In order to enable multiple battery cells to be connected in series and parallel, multiple battery cells can be electrically connected through a busbar.

[0003] At present, in order to install the busbar in the battery module, a busbar bracket needs to be provided to carry the busbar so that the busbar can be stably installed in the battery module. However, this also leads to a large number of components in the battery module and a complex structure. Utility Model Content

[0004] The present application provides a battery module, which solves the problem of complex battery module structure in the related art.

[0005] The present application provides a battery module, comprising:

[0006] A box body, wherein a plurality of accommodating grooves are provided in the box body;

[0007] A plurality of battery cells are respectively disposed in the plurality of accommodating grooves;

[0008] A water cooling element is disposed in the box, and at least a portion of the outer wall of any one of the battery cells is in contact with the water cooling element;

[0009] A mica board is stacked on a plurality of the boxes, and the mica board is connected to the boxes;

[0010] The busbar is stacked on the side of the mica board facing away from the battery cells. The busbar and / or the plurality of battery cells are passed through the mica board for electrical connection.

[0011] In some embodiments, the battery cell has a tab end, and the tab end is passed through the mica board and is welded to the busbar.

[0012] In some embodiments, a first positioning member is further included, and the first positioning member is penetrated through the mica board and the bus bar to fix the bus bar to the mica board.

[0013] In some embodiments, a second positioning member is further included, and the second positioning member is penetrated through the mica board and the box body to fix the mica board to the box body.

[0014] In some embodiments, one end of the first positioning member is a conical surface, the first positioning member has a plurality of limiting protrusions in the length direction, and the structure of the second positioning member is the same as that of the first positioning member.

[0015] In some embodiments, the mica board is provided with a pouring gate penetrating the mica board, and one end of the pouring gate opens toward the box body.

[0016] In some embodiments, the bus includes a series bus, a total positive bus and a total negative bus, adjacent battery cells are electrically connected via the series bus, and the total positive bus and the total negative bus are electrically connected to different battery cells.

[0017] In some embodiments, the plurality of battery cells are spaced apart along a first direction to form a battery cell group, the number of the battery cell groups is plural, the plurality of battery cell groups are spaced apart along a second direction, and the first direction is perpendicular to the second direction.

[0018] In some embodiments, there are multiple water-cooling components, and the multiple water-cooling components are arranged between adjacent battery cell groups along the second direction.

[0019] In some embodiments, the water-cooling component has a liquid inlet, a liquid outlet, and a water-cooling channel, and two ends of the water-cooling channel are respectively connected to the liquid inlet and the liquid outlet.

[0020] In the battery module provided by the present application, multiple battery cells are arranged in the receiving grooves of the box body so that the multiple battery cells can be fixed in the receiving grooves of the box body, and the box body can protect the battery cells. The water cooling component is arranged in the box body and contacts any battery cell, so that the heat generated by the battery cell can be conducted to the water cooling component to dissipate the heat of the battery cell. The mica board is stacked on the box body so that the mica board can be fixed on the box body, and the bus is stacked on the mica board so that the bus can be relatively fixed to the box body through the mica board. The bus is electrically connected to multiple battery cells so that the multiple battery cells can be connected in series. In this way, there is no need to set up additional structural members for carrying and installing the bus, so that the number of components of the battery module of the present application is relatively small, and the preparation cost is relatively low.

[0021] When assembling the battery module of the present application, the bus can be stacked on the mica board and then the mica board can be fixed on the box, and then the bus can be electrically connected to the battery cell. In this way, the bus can be pre-fixed to facilitate the bus to be electrically connected to the battery cell, making the battery module assembly process of the present application simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0023] Figure 1 A schematic diagram of a battery module according to an embodiment of the present application;

[0024] Figure 2 An exploded schematic diagram of a battery module according to an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the connection between the mica board and the bus bar of the battery module of the embodiment of the present application;

[0026] Figure 4 A schematic diagram of a mica board of a battery module according to an embodiment of the present application;

[0027] Figure 5 A schematic diagram of a first positioning member of a battery module according to an embodiment of the present application;

[0028] Figure 6 A schematic diagram of a bus bar of a battery module according to an embodiment of the present application;

[0029] Figure 7 A schematic diagram of a battery cell of a battery module according to an embodiment of the present application;

[0030] Figure 8 Schematic diagram of the water cooling component of the battery module according to an embodiment of the present application.

[0031] Reference numerals:

[0032] 100-box, 110-accommodation tank,

[0033] 200-cell,

[0034] 300- water cooling part, 310- liquid inlet, 320- liquid outlet, 330- connecting pipe,

[0035] 400-mica board, 410-injection gate, 420-first positioning hole, 430-third positioning hole,

[0036] 500-bus, 510-series bus, 520-total positive bus, 530-total negative bus,

[0037] 600-first positioning member, 610-limiting protrusion. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] A battery module is a battery device that can integrate multiple battery cells. Multiple battery cells connected in series and parallel can provide greater power, and have the advantages of high integration and high structural stability. In order to enable multiple battery cells to be connected in series and parallel, multiple battery cells can be electrically connected through a busbar.

[0045] At present, in order to install the busbar in the battery module, a busbar bracket needs to be provided to carry the busbar so that the busbar can be stably installed in the battery module. However, this also leads to a large number of components in the battery module and a complex structure.

[0046] In the battery module proposed in the present application, multiple battery cells are arranged in the receiving grooves of the box body so that the multiple battery cells can be fixed in the receiving grooves of the box body, and the box body can protect the battery cells. The water cooling component is arranged in the box body and contacts any battery cell, so that the heat generated by the battery cell can be conducted to the water cooling component to dissipate the heat of the battery cell. The mica board is stacked on the box body so that the mica board can be fixed on the box body, and the bus is stacked on the mica board so that the bus can be relatively fixed to the box body through the mica board. The bus is electrically connected to multiple battery cells so that the multiple battery cells can be connected in series. In this way, there is no need to set up additional structural parts for carrying and installing the bus, so that the number of components of the battery module of the present application is relatively small, and the preparation cost is relatively low.

[0047] When assembling the battery module of the present application, the bus can be stacked on the mica board and then the mica board can be fixed on the box, and then the bus can be electrically connected to the battery cell. In this way, the bus can be pre-fixed to facilitate the bus to be electrically connected to the battery cell, making the battery module assembly process of the present application simpler.

[0048] The battery module provided in the present application is described in detail below in conjunction with specific embodiments.

[0049] This application proposes a battery module, referring to Figures 1 to 8 As shown, the battery module includes a box 100, a plurality of battery cells 200, a water cooling member 300, a mica plate 400 and a bus bar 500. The battery module can be used in automobiles.

[0050] Among them, the box 100 is the basic component of the battery module of the present application. The box 100 can provide a mounting base for at least some of the other components of the battery module and protect at least some of the other components. The box 100 can be made of metal material, so that the box 100 has better structural strength, thereby making the durability and reliability of the box 100 better. Of course, the box 100 can also be made of polymer material, so that the box 100 has a certain structural strength and is relatively light.

[0051] The box 100 is provided with a receiving groove 110, which can be used to receive the battery cell 200. The number of the receiving grooves 110 can be set to be multiple, so that multiple battery cells 200 can be respectively arranged in the multiple receiving grooves 110. The cavity shape and size of the receiving groove 110 of the box 100 can be set to match the shape and size of the battery cell 200, so that the battery cell 200 can be relatively stably and reliably installed in the receiving groove 110, so that the box 100 can also protect the multiple battery cells 200. Specifically, the size of the receiving groove 110 can be set to be slightly larger than the size of the battery cell 200, so that the inner wall of the receiving groove 110 of the box 100 can limit the battery cell 200, and the battery cell 200 can be conveniently installed in the receiving groove 110 of the box 100. The inner wall of the receiving groove 110 may be coated with structural adhesive, and the outer wall of the battery cell 200 may be bonded to the inner wall of the receiving groove 110 by the structural adhesive, so that the battery cell 200 can be reliably fixed in the receiving groove 110 .

[0052] The mica board 400 is stacked on the box 100, and the mica board 400 can be fixedly connected to the box 100. The mica board 400 is opposite to the receiving groove 110 of the box 100, so that the mica board 400 can cover the open side of the box 100, which can protect the battery cell 200 in the box 100 to a certain extent. In addition, it should be understood that the mica board 400 has good heat insulation and flame retardant properties. When the battery cell 200 in the box 100 has a thermal runaway failure, the mica board 400 can also group the heat generated by the battery cell 200 to a certain extent, making the battery module of the present application safer.

[0053] The busbar 500 is stacked on the side of the mica board 400 facing away from the battery cell 200, so that the busbar 500 can be fixed on the mica board 400, so that the busbar 500 can be relatively fixed to the box 100 through the mica board 400. The busbar 500 can be electrically connected to multiple battery cells 200, so that the multiple battery cells 200 can be electrically connected to each other, so that the multiple battery cells 200 can be connected in series, so that the multiple battery cells 200 in the battery module of the present application can release electrical energy to the outside at the same time. Specifically, the busbar 500 and / or the battery cell 200 can be penetrated in the mica sheet, so that the busbar 500 and the battery cell 200 can be in contact with each other for electrical connection. Since the bus 500 is arranged on the mica board 400, there is no need to additionally set up a structural member for fixing the bus 500, so that the bus 500 can be fixed on the box body 100, thereby reducing the number of components of the battery module of the present application, making the structure of the battery module relatively simpler, and reducing the preparation cost of the battery module.

[0054] When assembling the battery module of the present application, the busbar 500 can be first installed on the mica board 400 so that the busbar 500 can be pre-fixed. Then the mica board 400 can be fixed on the box 100. At this time, the busbar 500 has been set corresponding to the battery cell 200, and the busbar 500 can be conveniently connected to multiple battery cells 200, so that the multiple battery cells 200 are electrically connected to the busbar 500, so that the multiple battery cells 200 are connected in series. In this way, it is not necessary to separately install and fix the busbar 500 on the box 100, so that the assembly process of the battery module of the present application is also relatively simple, so as to reduce the preparation cost of the battery module.

[0055] The water cooling element 300 can be arranged in the box 100, at least part of the outer wall of any battery cell 200 can be in contact with the water cooling element 300, and a coolant can be passed into the water cooling element 300. When the battery cell 200 is in contact with the water cooling element 300, the heat of the battery cell 200 can be transferred to the water cooling element 300 and absorbed by the coolant in the water cooling element 300, so that the temperature of the battery cell 200 can be reduced. In this way, the temperature of the battery module of the present application will not be too high during the charging and discharging process, and the battery module is safer and more reliable.

[0056] Specifically, an installation groove for installing the water cooling component 300 can be opened in the box body 100, the inner wall of the installation groove can be coated with thermal conductive adhesive, the outer wall of the water cooling component 300 can be fixed to the inner wall of the installation groove by the thermal conductive adhesive, and the heat conducted from the battery cell 200 to the box body 100 can also be efficiently conducted to the water cooling component 300 by the thermal conductive adhesive.

[0057] In some embodiments, in order to electrically connect the battery cell 200 to the busbar 500, the battery cell 200 may be provided with a tab end. The tab end is a structure for electrically connecting the battery cell 200 to other components. The tab end of the battery cell 200 may be inserted into the mica plate 400 so that the tab end may contact the busbar 500. The tab end and the busbar 500 may be fixed by welding so that the tab end and the busbar 500 may be electrically connected.

[0058] Specifically, the mica board 400 may be provided with openings corresponding to the plurality of battery cells 200, so that the tab ends of the plurality of battery cells 200 may pass through the openings and extend into the side of the mica board 400 facing away from the box 100, so that the mica board 400 may also be sleeved on the plurality of battery cells 200. The aperture of the opening on the mica board 400 may be set to match the outer diameter of the battery cell 200, so that the plurality of battery cells 200 may also serve the purpose of limiting the position of the mica board 400, thereby making the structure of the mica board 400 disposed on the box 100 more stable.

[0059] Of course, in other embodiments, the mica board 400 can be arranged to be stacked as a whole on multiple battery cells 200, and one end of the bus 500 can be passed through the mica board 400 to the side of the mica board 400 facing the battery cell 200, so that one end of the bus 500 can also contact the battery cell 200 for electrical connection.

[0060] After the busbar 500 is connected to the tab end of the battery cell 200 by welding, the busbar 500 can be reliably connected to the battery cell 200. In this way, the busbar 500 can also be pressed on the mica board 400 so that the mica board 400 and the battery cell 200 can be further fixed to achieve the purpose of fixing the mica board 400, thereby making the structure of the battery module of the present application more stable and reliable.

[0061] In some embodiments, in order to fix the mica board 400 of the present application with the busbar 500, the battery module of the present application may also be provided with a first positioning member 600. The first positioning member 600 is provided through the mica board 400 and the busbar 500, so that the mica board 400 and the busbar 500 can be fixed through the first positioning member 600. Specifically, a first positioning hole 420 may be provided on the mica board 400, and a second positioning hole corresponding to the first positioning hole 420 may be provided on the busbar 500. The first positioning member 600 may be provided through the first positioning hole 420 and the second positioning hole, so that the first positioning member 600 is fixed in the first positioning hole 420 and the second positioning hole, so that the first positioning member 600 is fixed to the mica board 400 and the busbar 500 at the same time.

[0062] The first positioning member 600 is detachably fixed in the first positioning hole 420 and the second positioning hole, so that the first positioning member 600 can be disassembled when it is necessary or necessary to disassemble and separate the mica board 400 from the bus bar 500. In this way, when the bus bar 500 and / or the mica board 400 is damaged and needs to be replaced, the mica board 400 and / or the bus bar 500 can be easily disassembled and replaced, so that the maintenance cost of the battery module of the present application is relatively lower.

[0063] In some embodiments, in order to fix the mica board 400 of the present application to the box 100, the battery module of the present application may also be provided with a second positioning member. The second positioning member is provided through the mica board 400 and the box 100, so that the mica board 400 and the box 100 can be fixed by the second positioning member. Specifically, a third positioning hole 430 may be provided on the mica board 400, and a fourth positioning hole corresponding to the third positioning hole 430 may be provided on the box 100. The second positioning member may be provided through the third positioning hole 430 and the fourth positioning hole, so that the second positioning member is fixed in the third positioning hole 430 and the fourth positioning hole, so that the second positioning member is fixed to the mica board 400 and the box 100 at the same time.

[0064] The second positioning member is detachably fixed in the third positioning hole 430 and the fourth positioning hole, so that the second positioning member can be removed when it is necessary or necessary to remove or separate the mica board 400 from the box body 100. In this way, when the box body 100 and / or the mica board 400 are damaged and need to be replaced, the mica board 400 and / or the box body 100 can be easily removed and replaced, so that the maintenance cost of the battery module of the present application is relatively lower.

[0065] In some embodiments, in order to enable the first positioning member 600 of the present application to fix the mica board 400 and the bus 500, one end of the first positioning member 600 can be set to a conical surface, and the conical surface can serve as a guide, so that the end of the first positioning member 600 with a conical surface can be more conveniently inserted into the first positioning hole 420 of the mica board 400 and the second positioning hole of the bus 500. The first positioning member 600 can also be provided with a plurality of limiting protrusions 610 in the length direction of the first fixing member, and the limiting protrusions 610 are also conical, and the limiting protrusions 610 can be deformed by force. In this way, when the first positioning member 600 is inserted into the first positioning hole 420 and the second positioning hole, the inner wall of the first positioning hole 420 and the inner wall of the second positioning hole can squeeze the limiting protrusion 610, so that the limiting protrusion 610 is deformed, so that the first positioning member 600 can be firmly fixed in the first positioning hole 420 and the second positioning hole.

[0066] The second positioning member may adopt the same structure as the first positioning member 600, so that the second positioning member does not need to be prepared by a separate mold, thereby improving the interchangeability of parts of the battery module of the present application and reducing the preparation and maintenance costs of the battery module.

[0067] In some embodiments, the mica board 400 of the present application may be provided with a pouring gate 410, and the pouring gate 410 is provided through the mica board 400. Specifically, the pouring gate 410 passes through the mica board 400 along the thickness direction of the mica board 400. One end opening of the pouring gate 410 is located on the side of the mica board 400 facing the box body 100, and the other end opening of the pouring gate 410 is located on the side of the mica board 400 facing away from the box body 100, so that the inside of the box body 100 can be connected with the outside of the box body 100 through the pouring gate 410.

[0068] It should be understood that when the battery cell 200 is disposed in the receiving groove 110 of the box 100, there may be a gap between the battery cell 200 and the inner wall of the edge of the box 100, and there may also be a gap between the battery cell 200 and the mica board 400. In order to make the structure of the battery module more stable, the insulating filling part can be injected into the box 100 through the injection gate 410 on the mica board 400, so that the insulating filling part can be filled in the gap in the box 100, so as to achieve the purpose of fixing the various components in the box 100, such as the battery cell 200. The insulating filling part can be specifically made of insulating foam.

[0069] The number of injection gates 410 can be set to multiple, and multiple injection gates 410 can be distributed in various parts of the mica board 400, so that the insulating filling part can be injected into various areas in the box body 100 through the injection gates 410, so that the insulating filling part can be filled in the gaps in various areas in the box body 100.

[0070] In some embodiments, in order to enable the busbar 500 to electrically connect multiple battery cells 200 to each other, the busbar 500 may be provided to include a series busbar 510, a total positive busbar 520, and a total negative busbar 530. Among them, the number of series busbars 510 may be set to multiple, and adjacent battery cells 200 may be electrically connected through the series busbar 510. Specifically, the battery cell 200 may have a positive pole ear and a negative pole ear at the pole ear end, and in two adjacent battery cells 200, the positive pole ear of one battery cell 200 may be electrically connected to the negative pole ear of the other battery cell 200 through the series busbar 510. In this way, the positive pole ear and the negative pole ear of the adjacent battery cells 200 are connected through the series busbar 510.

[0071] The total positive busbar 520 and the total negative busbar 530 can be electrically connected to different battery cells 200 among the multiple battery cells 200. The multiple battery cells 200 can be connected to an external electrical connection structure through the total positive busbar 520 and the total negative busbar 530, and can be electrically connected to a cable, so that the multiple battery cells 200 can be charged and discharged. The total positive busbar 520 and the total negative busbar 530 can be set at the edge of the box 100, and are electrically connected to the battery cells 200 located at the edge of the box 100 among the multiple battery cells 200.

[0072] In some embodiments, in the present application, multiple battery cells 200 may be arranged at intervals along the first direction to form a battery cell group. Accordingly, multiple accommodating grooves 110 may be provided in the box 100 along the first direction, and multiple battery cells 200 in the battery cell group may be arranged in multiple accommodating grooves 110. The first direction may be a linear direction, so that the multiple battery cells 200 in the battery cell group may be orderly distributed in the box 100. There are also multiple battery cell groups, and the multiple battery cell groups may be distributed at intervals along the second direction, which is a direction perpendicular to the first direction, so that the multiple battery cells 200 may be distributed along the first direction and along the second direction, so that the multiple battery cells 200 may be arranged in the box 100 in a rectangular display form.

[0073] In some embodiments, the number of water cooling parts 300 of the present application can be set to multiple, and multiple water cooling parts 300 can be set in adjacent. Multiple water cooling parts 300 can be arranged at intervals along the second direction, so that there is a water cooling part between adjacent battery cell groups. In this way, the battery cells 200 in two adjacent battery cell groups can contact the opposite sides of the water cooling parts 300 respectively, so that the heat of the battery cells 200 in the adjacent battery cell groups can be conducted to the water cooling parts 300 for dissipation.

[0074] In the present application, a water cooling component 300 can be provided on one side of any battery cell group, and a water cooling component 300 is not required to be provided on the other side of the battery cell group. This ensures that the battery cells 200 in each battery cell group can be in contact with the water cooling component 300 to dissipate heat, and can reduce the number of water cooling components 300, so that the preparation cost of the battery module of the present application is relatively low.

[0075] The water-cooling component 300 is also provided with a liquid inlet 310, a liquid outlet 320 and a water-cooling channel. The water-cooling channel of the water-cooling component 300 is a closed cavity channel structure inside the water-cooling component 300. The liquid inlet 310 and the liquid outlet 320 can be arranged on the surface of the water-cooling component 300, and the liquid inlet 310 and the liquid outlet 320 are both connected to the water-cooling channel of the water-cooling component 300. External coolant can flow into the water-cooling channel through the liquid inlet 310 of the water-cooling component 300, and be discharged through the liquid outlet 320 of the water-cooling component 300. Specifically, the liquid inlet 310 and the liquid outlet 320 of the water-cooling component 300 can be connected to an external pumping mechanism, so that the coolant can circulate through the water-cooling channel. When the battery cell 200 disposed in the receiving groove 110 generates heat during operation, the heat can be conducted to the outer wall of the water-cooling component 300 and then to the water-cooling channel, so that the heat can be absorbed by the coolant, thereby reducing the temperature of the battery cell 200.

[0076] Multiple water-cooling components 300 can be connected via a connecting pipe 330, so that the water cooling channels of the multiple water-cooling components 300 can be connected via the connecting pipe 330, so that an external pumping mechanism can be connected to any water-cooling component 300, so that the coolant can be input into the multiple water-cooling components 300.

[0077] In some embodiments, the box 100 of the present application may also have a vent hole, which may be provided on the surface of the box 100 and communicated with the receiving groove 110. Specifically, the vent hole is located at one side of the bottom of the box 100, and the gas generated by the battery cell 200 may be discharged to the outside of the box 100 through the vent hole to avoid excessive air pressure in the box 100. The inner wall of the box 100 is provided with reinforcing ribs, which may enhance the structural strength of the box 100, so that the reliability of the battery module of the present application is better.

[0078] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A battery module, characterized in that: include: A box body (100), wherein a plurality of accommodating grooves (110) are provided in the box body (100); A plurality of battery cells (200) are respectively disposed in the plurality of accommodating grooves (110); A water cooling element (300) is arranged in the box body (100), and at least a portion of the outer wall of any one of the battery cells (200) is in contact with the water cooling element (300); A mica board (400) is stacked on a plurality of the boxes (100), and the mica board (400) is connected to the boxes (100); A busbar (500) is stacked on a side of the mica board (400) facing away from the battery cell (200); the busbar (500) and / or a plurality of the battery cells (200) are penetrated through the mica board (400) for electrical connection.

2. The battery module according to claim 1, characterized in that: The battery cell (200) has a tab end, and the tab end is passed through the mica plate (400) and is welded to the busbar (500).

3. The battery module according to claim 2, characterized in that: It also includes a first positioning member (600), wherein the first positioning member (600) is inserted through the mica board (400) and the bus bar (500) to fix the bus bar (500) to the mica board (400).

4. The battery module according to claim 3, characterized in that: It also includes a second positioning member, which is inserted through the mica board (400) and the box (100) to fix the mica board (400) to the box (100).

5. The battery module according to claim 4, characterized in that: One end of the first positioning member (600) is a conical surface, the first positioning member (600) has a plurality of limiting protrusions (610) in the length direction, and the structure of the second positioning member is the same as that of the first positioning member (600).

6. The battery module according to claim 1, characterized in that: The mica board (400) is provided with a pouring gate (410) penetrating the mica board (400), and one end of the pouring gate (410) opens toward the box body (100).

7. The battery module according to claim 1, characterized in that: The busbar (500) comprises a series busbar (510), a total positive busbar (520) and a total negative busbar (530); adjacent battery cells (200) are electrically connected via the series busbar (510); and the total positive busbar (520) and the total negative busbar (530) are electrically connected to different battery cells (200).

8. The battery module according to claim 1, characterized in that: A plurality of the battery cells (200) are arranged at intervals along a first direction to form a battery cell group, the number of the battery cell groups is multiple, and the plurality of battery cell groups are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction.

9. The battery module according to claim 8, characterized in that: There are a plurality of water cooling components (300), and the plurality of water cooling components (300) are arranged between adjacent battery cell groups along the second direction.

10. The battery module according to any one of claims 1 to 9, characterized in that: The water cooling component (300) comprises a liquid inlet (310), a liquid outlet (320) and a water cooling channel, and two ends of the water cooling channel are respectively connected to the liquid inlet (310) and the liquid outlet (320).

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