Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and a battery pack, the battery module comprises a box body, a battery and a heat management plate, the box body is provided with a mounting cavity, the two ends of the box body along a first direction are provided with mounting holes, and the mounting holes are communicated with the mounting cavity; the batteries and the heat management plate are both arranged in the installation cavity, the two ends, in the first direction, of the heat management plate are fixedly inserted into the installation holes in the two ends, in the first direction, of the box body respectively, the batteries are arranged at the two ends of the heat management plate in the second direction, the batteries make contact with the heat management plate, and in other words, in the second direction, the batteries are separated through the heat management plate. The heat management plate can take away heat generated by thermal expansion of the battery, thermal diffusion of the battery in the second direction is avoided, and the safety of the battery module is improved; besides, the end plate is provided with the mounting hole, the heat management plate is inserted into the mounting hole so as to be assembled into the battery module, the end plate and the heat management plate are simple in structure and convenient to mount, and the structural strength of the battery module is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. Background Art

[0002] In related technologies, battery modules are usually stacked by stacking batteries, and then fixed into groups by end plates, side plates and structural adhesives. The battery is cooled and heated by placing the battery module on a liquid cooling plate, and thermal management is performed by cooling and heating the bottom of the battery. In battery modules with this structure, due to the stacking of batteries, the thermal expansion of the battery itself is likely to cause heat diffusion, and the safety of the battery module is low. Utility Model Content

[0003] The primary purpose of the utility model is to improve the safety of the battery module.

[0004] In order to achieve the above object, the utility model provides a battery module having a first direction and a second direction intersecting each other, including:

[0005] A box body having a mounting cavity, wherein mounting holes are provided at both ends of the box body along a first direction, and the mounting holes are communicated with the mounting cavity;

[0006] A plurality of batteries and a heat management plate are arranged in the installation cavity. The two ends of the heat management plate along the first direction are respectively fixedly inserted into the installation holes at the two ends of the box along the first direction. Along the second direction, the batteries are arranged at both ends of the heat management plate, and the batteries are in contact with the heat management plate.

[0007] In a specific embodiment of the utility model, the heat management plate has a medium flow channel and a medium inlet and a medium outlet connected to the medium flow channel, the medium inlet and the medium outlet are respectively arranged in the mounting hole, and at least part of the medium flow channel is located in the mounting cavity.

[0008] In a specific embodiment of the utility model, the heat management plate includes a plate body and a sealing plate, the plate body is provided with the medium flow channel, the medium flow channel extends along the first direction and passes through the plate body, both ends of the plate body along the first direction are connected to the sealing plates, and each of the sealing plates covers the two ends of the medium flow channel along the first direction, one of the sealing plates is provided with the medium inlet, and the other sealing plate is provided with the medium outlet;

[0009] Among them, the board body is arranged in the installation cavity, and the two ends of the board body along the first direction are respectively fixedly inserted into the installation holes at the two ends of the box body along the first direction, the sealing plate is located outside the box body, and the battery is in contact with the board body.

[0010] In a specific embodiment of the utility model, the battery module further has a third direction, and the first direction, the second direction and the third direction intersect each other;

[0011] The plate body is provided with a plurality of the medium flow channels, and the plurality of the medium flow channels are arranged along the third direction; a collecting groove is provided on one side of the sealing plate connected to the plate body, the medium inlet is connected to the collecting groove corresponding to the sealing plate, the medium outlet is connected to the collecting groove corresponding to the sealing plate, and the two ends of the medium flow channel along the first direction are respectively connected to the collecting groove corresponding to the sealing plate.

[0012] In a specific embodiment of the utility model, the battery module further has a third direction, and the first direction, the second direction and the third direction intersect each other;

[0013] A plurality of the batteries are arranged along the first direction to form a battery pack, and along the second direction, the battery packs are provided at both ends of the thermal management plate, and the batteries include a battery body and a pole, and the poles are provided at both ends of the battery body along the third direction;

[0014] The box body comprises a box body, a cover body and a CCS integrated board, the box body is provided with a receiving groove at one end along the second direction, the box body is provided with the mounting holes at both ends along the first direction, the mounting holes are communicated with the receiving groove, both ends of the receiving groove along the third direction are open ends, the open ends of the receiving groove are provided with the CCS integrated board, the cover body is connected to the box body and covers the notch of the receiving groove, and the groove wall of the receiving groove, the CCS integrated board and the cover body define the mounting cavity;

[0015] The battery body is connected to the thermal management board, and the poles at both ends of the battery body along the third direction are respectively connected to the CCS integrated boards at both ends of the accommodating groove along the third direction.

[0016] In a specific embodiment of the present invention, the battery body has a first side surface, the first side surface is the side surface of the battery body with the largest area, and the first side surface is in contact with the thermal management plate.

[0017] In a specific embodiment of the present invention, the battery module further comprises a thermally conductive gel layer, the thermally conductive gel layer is disposed between the battery and the thermal management plate, and the thermally conductive gel layer connects the battery and the thermal management plate.

[0018] In a specific embodiment of the utility model, the battery module also includes a thermally conductive insulating pad, the side of the battery facing away from the thermal management plate is connected to the thermally conductive insulating pad, and the side of the thermally conductive insulating pad facing away from the battery is connected to the cavity wall of the installation cavity.

[0019] In a specific embodiment of the utility model, the battery module further comprises an insulating sheet, and along the first direction, both ends of the battery pack are connected to the insulating sheet, and the side of the insulating sheet facing away from the battery pack is connected to the side wall of the accommodating groove.

[0020] The utility model also provides a battery pack, comprising a shell and the battery module as described above, wherein the battery module is arranged in the shell.

[0021] The battery module and battery pack of the present utility model have the following advantages compared with the prior art:

[0022] In the battery module of the utility model, both ends of the heat management plate along the second direction are in contact with the battery, that is, in the second direction, the battery is separated by the heat management plate. In practical applications, the heat management plate can take away the heat generated by the thermal expansion of the battery, avoid heat diffusion of the battery along the second direction, and improve the safety of the battery module. Moreover, the heat management plate can simultaneously perform heat management on the batteries at both ends along the second direction, and ensure the temperature uniformity of the batteries at both ends. In addition, the end plate is provided with a mounting hole, and the heat management plate is inserted into the mounting hole to be assembled into the battery module. The end plate and the heat management plate have simple structures, and the two are easy to install, and the structural strength of the battery module is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a battery module of an embodiment of the utility model;

[0024] Figure 2 This is an exploded schematic diagram of a battery module according to an embodiment of the utility model;

[0025] Figure 3 is another exploded schematic diagram of a battery module according to an embodiment of the utility model;

[0026] Figure 4 It is an exploded schematic diagram of a thermal management plate according to an embodiment of the utility model;

[0027] Figure 5 It is a structural diagram of a battery in an embodiment of the utility model;

[0028] Figure 6 It is a structural diagram of the connection between a battery pack, a thermally conductive gel layer, and a thermal management plate in an embodiment of the utility model.

[0029] In the figure, 1, box body; 101, installation cavity; 102, installation hole; 11, box body; 110, accommodating groove; 12, cover body; 13, CCS integrated board; 2, battery; 21, battery body; 210, first side; 22, pole; 3, thermal management board; 301, medium flow channel; 302, medium inlet; 303, medium outlet; 31, board body; 32, sealing board; 321, collecting groove; 4, thermal conductive gel layer; 5, thermal conductive insulating pad; 6, insulating sheet; X, first direction; Z, second direction; Y, third direction. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the application examples, "parallel" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. In addition, "perpendicular" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance, equal angle or equal area means that the tolerance range is -1% to 1%.

[0035] The utility model provides a battery pack, comprising a shell and the following battery module, the battery module is arranged in the shell, and the battery pack can supply power to electrical equipment.

[0036] like Figure 1-6 As shown, a battery module of a preferred embodiment of the utility model has a first direction X, a second direction Z and a third direction Y which are perpendicular to each other. The battery module includes a box body 1, a plurality of batteries 2 and a heat management plate 3. The box body 1 has a mounting cavity 101. Both ends of the box body 1 along the first direction X are provided with mounting holes 102, and the mounting holes 102 are connected to the mounting cavity 101; the batteries 2 and the heat management plate 3 are both arranged in the mounting cavity 101, and both ends of the heat management plate 3 along the first direction X are respectively fixedly inserted into the mounting holes 102 at both ends of the box body 1 along the first direction X. Along the second direction Z, both ends of the heat management plate 3 are provided with batteries 2, and the batteries 2 are in contact with the heat management plate 3, that is, in the second direction Z. In the direction Z, the battery 2 is separated by the thermal management plate 3. In actual application, the thermal management plate 3 can take away the heat generated by the thermal expansion of the battery 2, avoid thermal diffusion of the battery 2 along the second direction Z, and improve the safety of the battery module. The thermal management plate 3 can also absorb the expansion force of the battery 2, further improving the safety of the battery module. The thermal management plate 3 can simultaneously perform thermal management on the batteries 2 at both ends of the second direction Z, and ensure the uniform temperature of the batteries 2 at both ends. In addition, the end plate is provided with a mounting hole 102, and the thermal management plate 3 is inserted into the mounting hole 102 to be assembled into the battery module. The end plate and the thermal management plate 3 have simple structures, are easy to install, and have high structural strength of the battery module.

[0037] Furthermore, if Figure 4As shown, the heat management plate 3 has a medium flow channel 301 and a medium inlet 302 and a medium outlet 303 connected to the medium flow channel 301. Figure 2 As shown, the medium inlet 302 is arranged in one of the mounting holes 102, the medium outlet 303 is arranged in the other mounting hole 102, and at least part of the medium flow channel 301 is located in the mounting cavity 101, so as to ensure that the heat management plate 3 can exchange heat with the battery 2. In practical applications, the medium is liquid, and when the temperature of the battery 2 is relatively high, the heat is transferred to the heat management plate 3. At this time, the low-temperature liquid is input into the medium flow channel 301 from the medium inlet 302, and the low-temperature liquid is output from the medium flow channel 301 from the medium outlet 303, and the low-temperature liquid takes away the heat on the heat management plate 3 from the low-temperature liquid, thereby realizing the cooling of the battery 2; and when the temperature of the battery 2 is relatively low, the liquid with a certain temperature is input into the medium flow channel 301 from the medium inlet 302, and the liquid is output from the medium flow channel 301 from the medium outlet 303, and the heat is transferred to the battery 2 from the heat management plate 3, thereby making the battery 2 at a suitable working temperature. In other embodiments, the medium may be air, and low-temperature air is introduced into the medium channel 301 when the battery 2 needs to be cooled, and high-temperature air is introduced into the medium channel when the battery 2 needs to be heated.

[0038] like Figure 4 As shown, the heat management plate 3 includes a plate body 31 and a sealing plate 32. The plate body 31 is provided with a medium flow channel 301. The medium flow channel 301 extends along the first direction X and penetrates the plate body 31. Both ends of the plate body 31 along the first direction X are connected to the sealing plates 32, and each sealing plate 32 covers the two ends of the medium flow channel 301 along the first direction X. One of the sealing plates 32 is provided with a medium inlet 302, and the other sealing plate 32 is provided with a medium outlet 303; wherein, as Figure 2 As shown, the plate body 31 is arranged in the mounting cavity 101, and the two ends of the plate body 31 along the first direction X are respectively fixedly inserted into the mounting holes 102 at the two ends of the box body 1 along the first direction X, the sealing plate 32 is located outside the box body 1, and the battery 2 is in contact with the plate body 31. The heat management plate 3 of this structure is convenient to connect with the end plate. Specifically, when the heat management plate 3 is connected with the end plate, the plate body 31 is first inserted into the mounting hole 102, and then the sealing plate 32 is connected with the plate body 31, wherein the plate body 31 and the mounting hole 102 are fixedly connected by interference fit, and the sealing plate 32 is fixedly connected with the plate body 31 by welding.

[0039] Furthermore, if Figure 4As shown, the plate body 31 is provided with a plurality of medium flow channels 301, and the plurality of medium flow channels 301 are arranged along the third direction Y; a collecting groove 321 is provided on one side of the sealing plate 32 connected to the plate body 31, the medium inlet 302 is connected to the collecting groove 321 of the corresponding sealing plate 32, the medium outlet 303 is connected to the collecting groove 321 of the corresponding sealing plate 32, and the two ends of the medium flow channel 301 along the first direction X are respectively connected to the collecting groove 321 of the corresponding sealing plate 32. Specifically, the provision of the plurality of medium flow channels 301 can make the medium evenly distributed in the plate body 31, and the medium in each medium flow channel 301 can perform heat exchange with the battery 2, thereby ensuring the heat exchange effect.

[0040] like Figure 2 As shown, a plurality of batteries 2 are arranged along a first direction X to form a battery group 2, and along a second direction Z, two battery groups 2 are provided at both ends of the thermal management plate 3, such as Figure 5 As shown, the battery 2 includes a battery body 21 and a pole 22. The battery body 21 is a square structure. The length direction of the battery body 21 is the third direction Y. The poles 22 are provided at both ends of the battery body 21 along the third direction Y. Figure 3 As shown, the box body 1 includes a box body 11, a cover body 12 and a CCS integrated board 13. A receiving groove 110 is provided at one end of the box body 11 along the second direction Z, and mounting holes 102 are provided at both ends of the box body 11 along the first direction X. The mounting holes 102 are connected to the receiving groove 110. Both ends of the receiving groove 110 along the third direction Y are open ends. The open ends of the receiving groove 110 are provided with CCS integrated boards 13. The cover body 12 is welded to the box body 11 and covers the notch of the receiving groove 110. The groove wall of the receiving groove 110 and the CCS integrated board 13 and the cover body 12 define an installation cavity 101. The box body 1 with this structure is suitable for the battery 2 with the above-mentioned poles 22 located at both ends of the battery body 21; wherein the battery body 21 is connected to the thermal management board 3, and the poles 22 at both ends of the battery body 21 along the third direction Y are respectively connected to the CCS integrated boards 13 at both ends of the receiving groove 110 along the third direction Y. Specifically, the CCS integrated board 13 is a system integrated board that integrates voltage / temperature acquisition function, overcurrent protection function, battery 2 electrical connection function and structural support function. The box body 11 includes a bottom plate and an end plate, and the end plates are welded at both ends of the bottom plate along the first direction X. Each end plate is provided with the above-mentioned mounting hole 102. The box body 11 of this structure is easy to process.

[0041] Furthermore, if Figure 5 and Figure 6As shown, the battery body 21 has a first side surface 210, which is the side surface with the largest area of ​​the battery body 21. The first side surface 210 is in contact with the heat management plate 3. The square-structured battery 2 has two first side surfaces 210 arranged opposite to each other, one of which is in contact with the heat management plate 3. The heat exchange efficiency between the battery 2 and the heat management plate 3 is improved by connecting the side surface with the largest area to the heat management plate 3. In addition, this arrangement of the battery 2 can also reduce the size of the battery module along the second direction Z. Applying this battery module to the battery pack 2 can improve the space utilization of the battery pack 2 along the second direction Z.

[0042] Furthermore, if Figure 6 As shown, the battery module also includes a thermally conductive gel layer 4. A thermally conductive gel layer 4 is provided between the battery 2 and the thermal management plate 3. The thermally conductive gel layer 4 connects the battery 2 and the thermal management plate 3. The thermally conductive gel layer 4 has adhesion and thermal conductivity. Based on this, the battery 2 and the thermal management plate 3 can be stably connected and the heat exchange effect between the battery 2 and the thermal management plate 3 can be ensured.

[0043] Furthermore, if Figure 3 As shown, the battery module also includes a thermally conductive insulating pad 5, and the side of the battery 2 facing away from the heat management plate 3 is connected to the thermally conductive insulating pad 5, and the side of the thermally conductive insulating pad 5 facing away from the battery 2 is connected to the cavity wall of the mounting cavity 101. The thermally conductive insulating pad 5 has thermal conductivity and insulation properties. Based on this, it can achieve insulation between the battery 2 and the box body 1, and play a role in conducting the heat of the battery 2 to the box body 1. Moreover, since the side of the battery 2 facing away from the heat management plate 3 is also the side with the largest area, the thermally conductive insulating pad 5 is connected to this side, which can improve the heat dissipation efficiency of the battery 2.

[0044] Furthermore, if Figure 3 As shown, the battery module also includes an insulating sheet 6. Along the first direction X, both ends of the battery group 2 are connected with insulating sheets 6. The side of the insulating sheet 6 facing away from the battery group 2 is connected to the side wall of the accommodating groove 110. The insulating sheet 6 realizes the insulation between the battery group 2 and the box body 1. The insulating sheet 6 cooperates with the thermally conductive insulating pad 5 to realize the insulation between all batteries 2 and the box body 1, thereby ensuring the safety of the battery module. Preferably, the insulating sheet 6 can be connected to the battery 2 and the side wall of the accommodating groove 110 by adhesive, based on which, the stable layout of the insulating sheet 6 and the battery 2 can be ensured.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery module having a first direction (X) and a second direction (Z) intersecting each other, characterized in that: include: A box body (1) having a mounting cavity (101), and mounting holes (102) are provided at both ends of the box body (1) along a first direction (X), and the mounting holes (102) are communicated with the mounting cavity (101); A plurality of batteries (2) and a heat management plate (3) are arranged in the installation cavity (101); the two ends of the heat management plate (3) along the first direction (X) are respectively fixedly inserted into the installation holes (102) at the two ends of the box body (1) along the first direction (X); along the second direction (Z), the batteries (2) are arranged at both ends of the heat management plate (3), and the batteries (2) are in contact with the heat management plate (3).

2. The battery module according to claim 1, characterized in that: The heat management plate (3) comprises a medium flow channel (301) and a medium inlet (302) and a medium outlet (303) which are connected to the medium flow channel (301); the medium inlet (302) and the medium outlet (303) are respectively arranged in the mounting hole (102); and at least a part of the medium flow channel (301) is located in the mounting cavity (101).

3. The battery module according to claim 2, characterized in that: The heat management plate (3) comprises a plate body (31) and a sealing plate (32); the plate body (31) is provided with the medium flow channel (301); the medium flow channel (301) extends along the first direction (X) and passes through the plate body (31); both ends of the plate body (31) along the first direction (X) are connected to the sealing plates (32), and each sealing plate (32) covers the two ends of the medium flow channel (301) along the first direction (X), one of the sealing plates (32) is provided with the medium inlet (302), and the other sealing plate (32) is provided with the medium outlet (303); The plate body (31) is arranged in the installation cavity (101), and the two ends of the plate body (31) along the first direction (X) are respectively fixedly inserted into the installation holes (102) at the two ends of the box body (1) along the first direction (X), the sealing plate (32) is located outside the box body (1), and the battery (2) is in contact with the plate body (31).

4. The battery module according to claim 3, characterized in that: The battery module also has a third direction (Y), and the first direction (X), the second direction (Z) and the third direction (Y) intersect each other; The plate body (31) is provided with a plurality of the medium flow channels (301), and the plurality of the medium flow channels (301) are arranged along the third direction (Y); a collecting groove (321) is provided on one side of the sealing plate (32) connected to the plate body (31); the medium inlet (302) is connected to the collecting groove (321) corresponding to the sealing plate (32); the medium outlet (303) is connected to the collecting groove (321) corresponding to the sealing plate (32); and the two ends of the medium flow channel (301) along the first direction (X) are respectively connected to the collecting groove (321) corresponding to the sealing plate (32).

5. The battery module according to claim 1, characterized in that: The battery module also has a third direction (Y), and the first direction (X), the second direction (Z) and the third direction (Y) intersect each other; A plurality of the batteries (2) are arranged along the first direction (X) to form a battery group; along the second direction (Z), the battery group is provided at both ends of the thermal management plate (3); the battery (2) comprises a battery body (21) and a pole (22); and the pole (22) is provided at both ends of the battery body (21) along the third direction (Y); The box body (1) comprises a box body (11), a cover body (12) and a CCS integrated board (13); a receiving groove (110) is provided at one end of the box body (11) along the second direction (Z); the mounting holes (102) are provided at both ends of the box body (11) along the first direction (X); the mounting holes (102) are communicated with the receiving groove (110); both ends of the receiving groove (110) along the third direction (Y) are open ends; the open ends of the receiving groove (110) are provided with the CCS integrated board (13); the cover body (12) is connected to the box body (11) and covers the notch of the receiving groove (110); the groove wall of the receiving groove (110) and the CCS integrated board (13) and the cover body (12) define the mounting cavity (101); The battery body (21) is connected to the thermal management plate (3), and the poles (22) at both ends of the battery body (21) along the third direction (Y) are respectively connected to the CCS integrated board (13) at both ends of the accommodating groove (110) along the third direction (Y).

6. The battery module according to claim 5, characterized in that: The battery body (21) has a first side surface (210), the first side surface (210) being the side surface with the largest area of ​​the battery body (21), and the first side surface (210) is in contact with the heat management plate (3).

7. The battery module according to claim 1, characterized in that: The battery module further comprises a heat-conducting gel layer (4), the heat-conducting gel layer (4) being arranged between the battery (2) and the heat-management plate (3), and the heat-conducting gel layer (4) connecting the battery (2) and the heat-management plate (3).

8. The battery module according to claim 1, characterized in that: The battery module further comprises a thermally conductive insulating pad (5), the side of the battery (2) facing away from the heat management plate (3) being connected to the thermally conductive insulating pad (5), and the side of the thermally conductive insulating pad (5) facing away from the battery (2) being connected to the cavity wall of the mounting cavity (101).

9. The battery module according to claim 5, characterized in that: The battery module also includes an insulating sheet (6), and along the first direction (X), both ends of the battery pack are connected to the insulating sheet (6), and the side of the insulating sheet (6) facing away from the battery pack is connected to the side wall of the accommodating groove (110).

10. A battery pack, characterized in that: It comprises a shell and a battery module as described in any one of claims 1 to 9, wherein the battery module is arranged in the shell.

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