Battery assembly and battery pack with same

Abstract

The utility model provides a battery assembly and a battery pack with the same, the battery assembly comprises a battery cell, the battery cell comprises a plurality of battery monomers, and the plurality of battery monomers are stacked along a first direction; the battery cell is arranged in the first direction, the number of the fixing plates is two, the two fixing plates are arranged on the two sides of the battery cell in the second direction, the battery cell is arranged on the two fixing plates, the fixing plates are provided with connecting parts, the connecting parts are suitable for being detachably connected with a box body, and the second direction intersects with the first direction. According to the battery assembly disclosed by the utility model, the fixed plate is arranged, so that the battery cell can be effectively prevented from being separated from the fixed plate, the connection reliability of the battery cell and the fixed plate can be ensured, and meanwhile, the maintenance cost of the battery pack can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack manufacturing, in particular to a battery assembly and a battery pack having the same. Background Art

[0002] In the existing battery assembly, the battery cells are fixed in the box. When a battery cell is damaged, the entire battery pack needs to be replaced, which increases the maintenance cost of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery assembly, which can reduce the maintenance cost of a battery pack.

[0004] The utility model also provides a battery pack having the battery assembly.

[0005] According to the battery assembly of the embodiment of the utility model, it includes: a battery cell, the battery cell includes a plurality of battery cells, and the plurality of battery cells are stacked along a first direction; a fixing plate, the fixing plates include two, the two fixing plates are arranged on both sides of the battery cell in a second direction, the battery cell is arranged on the two fixing plates, the fixing plates have connecting parts, the connecting parts are suitable for detachable connection with a box body, and the second direction intersects with the first direction.

[0006] According to the battery assembly of the utility model, the fixing plate is provided, which can effectively prevent the battery cell from being separated from the fixing plate, thereby ensuring the connection reliability between the battery cell and the fixing plate, and at the same time, can reduce the maintenance cost of the battery pack.

[0007] According to some embodiments of the present invention, in the second direction, the connecting portion is arranged on the outer side of the periphery of the battery core.

[0008] According to some optional embodiments of the utility model, the fixing plate includes: a first section, the first section is arranged at the bottom of the battery cell; a second section, the second section is arranged on one side of the first section in the second direction, at least a part of the second section is arranged on the outer side of the periphery of the battery cell to form the connecting portion; a bending section, the bending section connects the first section and the second section, and the bending section extends obliquely downward in the direction from the first section to the second section.

[0009] According to some optional embodiments of the present invention, in the second direction, the length of the first section extending from the edge of the battery core to the interior of the battery core is 20 mm-200 mm.

[0010] According to some embodiments of the utility model, the fixed plate includes: a first layer plate, which is arranged at the bottom of the battery cell; a second layer plate, which is connected to the first layer plate and arranged at the lower side of the first layer plate, and at least a portion of the second layer plate is arranged on the outer side of the periphery of the battery cell to form the connecting portion.

[0011] According to some optional embodiments of the present invention, the first layer of plate is a polymer composite material, and / or the second layer of plate is a metal part.

[0012] According to some embodiments of the present invention, the battery core is adhesively connected to the fixing plate.

[0013] According to some embodiments of the utility model, the battery assembly includes: a heat spreader, which is arranged on the top of the battery cell. The battery assembly also includes: a baffle, which is arranged on both sides of the battery cell in the first direction, and the heat spreader is connected to the baffle.

[0014] According to some optional embodiments of the present invention, both side edges of the heat spreader in the first direction are bent downward to be connected to the baffle.

[0015] The battery pack according to the embodiment of the second aspect of the utility model comprises a box body and a battery assembly according to the first aspect of the utility model, wherein the battery assembly is disposed in the box body.

[0016] According to the battery pack of the utility model, by setting the battery assembly of the first embodiment and setting the fixing plate, the battery cells can be effectively prevented from being separated from the fixing plate, thereby ensuring the connection reliability between the battery cells and the fixing plate and reducing the maintenance cost of the battery pack.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery assembly according to an embodiment of the utility model from a first angle;

[0019] Figure 2 yes Figure 1 A schematic diagram of a second angle of the battery assembly shown in ;

[0020] Figure 3 yes Figure 1 A schematic diagram of a third angle of the battery assembly shown in FIG.

[0021] Figure 4 yes Figure 1 A schematic diagram of a fourth angle of the battery assembly shown in FIG.

[0022] Figure 5 is along Figure 4 Sectional view along line AA;

[0023] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0024] Figure 7 yes Figure 1 A schematic diagram of a fifth angle of the battery assembly shown in FIG.

[0025] Figure 8 yes Figure 7 A schematic diagram of a battery assembly shown in , wherein the fixing plate includes a first section, a second section and a bent section;

[0026] Fig. 9 yes Figure 8 A partial enlarged view of point C in the middle;

[0027] Fig.10 yes Figure 7 A schematic diagram of a battery assembly shown in , wherein the fixing plate includes a first layer plate and a second layer plate;

[0028] Fig.11 yes Fig.10 A partial enlarged view of point D in the middle.

[0029] Reference numerals:

[0030] 100. Battery assembly;

[0031] 10. Battery cells;

[0032] 20. fixed plate; 21. first section; 22. second section; 23. bending section;

[0033] 201, first layer board; 202, second layer board;

[0034] 30. Heat sink;

[0035] 40. Baffle;

[0036] 50. Insulation layer;

[0037] 60. Support plate. DETAILED DESCRIPTION

[0038] The embodiments of the present invention 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 invention, and should not be construed as limiting the present invention.

[0039] Please refer to the following Figure 1-11 A battery assembly 100 according to an embodiment of the present invention is described.

[0040] Reference Figure 1 , Figure 2 and Figure 7 According to an embodiment of the utility model, the battery assembly 100 includes: a battery cell 10 and a fixing plate 20.

[0041] Specifically, the battery cell 10 includes a plurality of battery cells, that is, the battery cell 10 includes two, three, four or more battery cells, and the plurality of battery cells are arranged along a first direction (eg Figure 7 The fixing plates 20 include two, and the two fixing plates 20 are arranged on the battery core 10 in the second direction (such as Figure 7 The front-to-back direction shown) on both sides (such as Figure 7 The front and rear sides of the battery cell 10 are shown in the figure. The battery cell 10 is arranged on two fixing plates 20. The fixing plates 20 have connecting parts, which are suitable for detachable connection with the box body. The second direction intersects with the first direction.

[0042] For example, Figure 1 , Figure 2 and Figure 7 As shown, a housing cavity is formed in the box body, and the battery cell 10 is arranged in the housing cavity. The battery cell 10 includes a plurality of battery cells stacked in the left-right direction. A fixing plate 20 is arranged at the front side of the battery cell 10, and another fixing plate 20 is arranged at the rear side of the battery cell 10. The connection parts on the two fixing plates 20 are respectively connected to the structure in the box body. Preferably, bolt holes are provided on the fixing plates 20, and the bolts pass through the bolt holes and are screwed to the box body. This connection form has a simple structure, low cost, and is convenient for mass production.

[0043] The battery assembly 100 of the utility model is provided with a fixing plate 20, and the battery cell 10 is fixed on two fixing plates 20, which can effectively prevent the battery cell 10 from being separated from the fixing plates 20, thereby ensuring the connection reliability between the battery cell 10 and the fixing plates 20. At the same time, when the battery cell 10 is damaged, the fixing plate 20 and the box body can be disassembled to repair the battery cell 10 without replacing the entire battery module, thereby reducing the maintenance cost of the battery pack and further reducing the cost of use.

[0044] According to the battery assembly 100 of the embodiment of the present invention, the fixing plate 20 is provided, which can effectively prevent the battery cell 10 from being separated from the fixing plate 20, thereby ensuring the connection reliability between the battery cell 10 and the fixing plate 20, and at the same time, reducing the maintenance cost of the battery pack.

[0045] According to some embodiments of the present invention, referring to Figure 1 , Figure 4 and Figure 7 , in the second direction (such as Figure 4 In the front-to-back direction shown in FIG. 1 , the connection portion is arranged on the outer side of the periphery of the battery core 10. Thus, the connection portion can protect the bottom of the battery core 10 to prevent the bottom of the battery core 10 from colliding with the box body, and at the same time, it can facilitate the connection between the connection portion and the box body.

[0046] For example, Figure 1 , Figure 4 and Figure 7 As shown, the connection portion of the left fixing plate 20 exceeds the left peripheral edge of the battery cell 10, and the connection portion of the right fixing plate 20 exceeds the right peripheral edge of the battery cell 10. Preferably, the upper surface of the fixing plate 20 is coated with an insulating coating or laid with an insulating film, so that the insulation between the fixing plate 20 and the battery cell 10 can be ensured.

[0047] Furthermore, if Figure 7 As shown, a support plate 60 is provided between the two fixing plates 20, and the support plate 60 is supported at the bottom of the battery cell 10. Thus, the support plate 60 can provide support for the battery cell 10 at the position between the two fixing plates 20, thereby sharing the gravity borne by the fixing plates 20, and further effectively preventing the fixing plates 20 from being overloaded and deformed.

[0048] According to some embodiments of the present invention, referring to Figure 7 , Figure 8 and Fig. 9 The fixing plate 20 includes: a first section 21, a second section 22 and a bent section 23. The first section 21 is disposed at the bottom of the battery cell 10 (eg Fig. 9 The second section 22 is arranged on one side of the first section 21 in the second direction, and at least a part of the second section 22 is arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion, that is, a part of the second section 22 can be arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion, or the whole of the second section 22 can be arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion; the bending section 23 connects the first section 21 and the second section 22, and in the direction from the first section 21 to the second section 22, the bending section 23 extends obliquely downward.

[0049] In this way, the first section 21 is connected to the battery cell 10, and the battery cell 10 can be fixed to the fixing plate 20, thereby preventing the battery cell 10 from being separated from the fixing plate 20. The second section 22 is formed as a connecting portion, which is convenient for connecting the fixing plate 20 to the box body. At the same time, the bent section 23 extends downward, so that the height of the second section 22 is lower than the height of the first section 21, thereby avoiding scratches between the bottom of the battery cell 10 and the second section 22, thereby protecting the battery cell 10.

[0050] For example, Figure 7 , Figure 8 and Fig. 9As shown, the first section 21 is arranged at the bottom of the battery cell 10, the first section 21 extends in the front-to-back direction, the second section 22 extends in the front-to-back direction, and the height of the second section 22 is lower than the height of the first section 21, the bending section 23 extends obliquely downward, and the two ends of the bending section 23 are respectively connected to the first section 21 and the second section 22.

[0051] According to some optional embodiments of the present invention, referring to Figure 7 , in the second direction (such as Figure 7 In the front-to-back direction shown in FIG. 1 , the length of the first section 21 extending from the edge of the battery cell 10 to the inside of the battery cell 10 is 20 mm to 200 mm. Thus, by limiting the length of the first section 21, the connection length between the fixing plate 20 and the battery cell 10 can be ensured, thereby ensuring the reliability of the connection between the battery cell 10 and the fixing plate 20, and at the same time, it can prevent the fixing plate 20 from being too long to increase the manufacturing cost of the first section 21.

[0052] For example, Figure 7 As shown, the length of the first section 21 extending from the edge of the battery cell 10 into the interior of the battery cell 10 may be 20 mm, 40 mm, 60 mm, 80 mm, 100 mm, 120 mm, 140 mm, 160 mm, 180 mm or 200 mm.

[0053] According to some embodiments of the present invention, referring to Figure 7 , Fig.10 and Fig.11 The fixing plate 20 includes: a first plate 201 and a second plate 202. The first plate 201 is disposed at the bottom of the battery cell 10 (eg Fig.11 The second layer plate 202 is connected to the first layer plate 201 and is arranged on the lower side of the first layer plate 201, and at least a portion of the second layer plate 202 is arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion, that is, a portion of the second layer plate 202 can be arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion, or the entire second layer plate 202 can be arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion.

[0054] In this way, the first layer board 201 is connected to the battery cell 10, and the battery cell 10 can be fixed to the fixed plate 20, thereby preventing the battery cell 10 from being separated from the fixed plate 20. A connecting portion is formed on the second layer board 202, which is convenient for connecting the fixed plate 20 to the box body. At the same time, the stacking of the second layer board 202 and the first layer board 201 can ensure the strength of the fixed plate 20, thereby effectively preventing the fixed plate 20 from being damaged.

[0055] For example, Figure 7 , Fig.10 and Fig.11As shown, the first layer plate 201 is arranged at the bottom of the battery cell 10, the second layer plate 202 is arranged on the lower side of the first layer plate 201, the left end of the second layer plate 202 of the left fixed plate 20 is arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion, and the right end of the second layer plate 202 of the right fixed plate 20 is arranged on the outer side of the periphery of the battery cell 10 to form a connecting portion.

[0056] According to some optional embodiments of the present invention, referring to Fig.11 The first layer 201 is a polymer composite material. Thus, the insulation and heat insulation effect of the fixing plate 20 can be ensured, thereby effectively preventing the battery cell 10 and the fixing plate 20 from short-circuiting.

[0057] Furthermore, if Fig.11 As shown, the second layer plate 202 is a metal piece, thereby ensuring the strength of the second layer plate 202, thereby ensuring the strength of the fixing plate 20, and effectively preventing the fixing plate 20 from being damaged.

[0058] According to some embodiments of the present invention, referring to Figure 7 , the battery cell 10 is bonded and connected to the fixing plate 20. Therefore, this connection form is simple and efficient, and at the same time, the connection strength between the battery cell 10 and the fixing plate 20 can be ensured.

[0059] According to some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 The battery assembly 100 includes a heat spreader 30 and a baffle 40. The heat spreader 30 is disposed on the top of the battery cell 10 (eg Figure 5 The baffle 40 is disposed on the battery cell 10 in the first direction (eg Figure 5 On both sides of the left and right direction (as shown), the heat spreader 30 is connected to the baffle 40.

[0060] In this way, the heat spreader 30 can maintain a constant temperature of the battery cell 10, thereby achieving temperature balance in different areas of the battery cell 10, and further ensuring that the battery cell 10 can operate at an appropriate temperature. At the same time, the baffle 40 can prevent the battery cell 10 from being scratched on both sides of the first direction, thereby improving the protection effect of the battery cell 10. In addition, the baffle 40 can also isolate the heat emitted by other structures in the battery pack, thereby preventing the battery cell 10 from thermal runaway.

[0061] For example, Figure 1 , Figure 5 and Figure 6 As shown, the heat spreader 30 is a horizontally extending rectangular plate, which is disposed on the upper side of the battery cell 10 , and the baffle 40 is arranged vertically, on the left and right sides of the battery cell 10 , and the upper end of the baffle 40 is connected to the heat spreader 30 .

[0062] Preferably, the heat spreader 30 is made of aluminum alloy, which can ensure the strength of the heat spreader 30. The surface of the heat spreader structure is coated with graphene, so as to ensure the heat conduction effect of the heat spreader 30. The thickness of the heat spreader 30 is 0.2mm-3mm, which can ensure the strength of the heat spreader 30 and effectively prevent the heat spreader 30 from being damaged. Preferably, the thickness of the baffle 40 is 0.5mm-5mm, which can ensure the strength of the baffle 40 and effectively prevent the baffle 40 from being damaged.

[0063] Furthermore, if Figure 5 and Figure 6 As shown, the battery assembly 100 includes: an insulating layer 50, which is provided between the heat spreader 30 and the battery cell 10, so as to ensure the insulation between the battery cell 10 and the heat spreader structure, and prevent the battery cell 10 from short-circuiting with the heat spreader 30. Preferably, the inner surface of the heat spreader 30 has an insulating paint or an insulating film attached, so as to ensure the insulation between the battery cell 10 and the heat spreader structure.

[0064] Furthermore, if Figure 5 and Figure 6 As shown, the heat spreader 30 is bonded to the insulating layer 50. Thus, the connection strength between the heat spreader 30 and the insulating layer 50 can be ensured.

[0065] According to some optional embodiments of the present invention, referring to Figure 5 and Figure 6 The heat spreader 30 is in the first direction (eg Figure 5 The two side edges (in the left and right directions as shown) are bent downwards and connected to the baffle 40. In this way, the connection strength between the heat spreader 30 and the baffle 40 can be ensured, thereby effectively preventing the heat spreader 30 from separating from the baffle 40. At the same time, the heat spreader 30 is bent downwards and connected to the baffle 40, so that no other connection structure is required to connect to the baffle 40, thereby reducing the production cost.

[0066] For example, Figure 5 and Figure 6 As shown, the left edge of the heat spreader 30 is bent downward and connected to the upper end of the left baffle 40, and the right edge of the heat spreader 30 is bent downward and connected to the upper end of the right baffle 40.

[0067] According to the battery pack of the second embodiment of the utility model, refer to Figure 1 , comprising a box and the battery assembly 100 of the first aspect of this embodiment, wherein the battery assembly 100 is disposed in the box. Preferably, the battery pack comprises a plurality of battery assemblies 100, so that the storage capacity of the battery pack can be ensured.

[0068] According to the battery pack of the embodiment of the utility model, by setting the battery assembly 100 of the first embodiment mentioned above and setting the fixing plate 20, the battery cell 10 and the fixing plate 20 can be effectively prevented from being separated, thereby ensuring the connection reliability between the battery cell 10 and the fixing plate 20, and at the same time, reducing the maintenance cost of the battery pack.

[0069] Furthermore, if Figure 5 and Figure 7 As shown, the length of the battery cell 10 is greater than or equal to twice the height of the battery cell 10. Since the battery cell 10 has output electrodes on both sides of the battery cell 10, the battery assembly 100 has good space utilization within the above ratio range, thereby effectively improving the space utilization of the battery pack.

[0070] In the description of the present invention, 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 invention 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 invention.

[0071] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] 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 utility model. 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.

[0074] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery assembly, characterized in that: include: A battery cell, wherein the battery cell comprises a plurality of battery cells, and the plurality of battery cells are stacked and arranged along a first direction; A fixing plate, comprising two fixing plates, the two fixing plates are arranged on both sides of the battery cell in the second direction, the battery cell is arranged on the two fixing plates, the fixing plate has a connecting portion, the connecting portion is suitable for detachable connection with the box body, and the second direction intersects with the first direction.

2. The battery assembly according to claim 1, characterized in that: In the second direction, the connecting portion is arranged on the outer side of the periphery of the battery core.

3. The battery assembly according to claim 1, characterized in that: The fixing plate comprises: A first section, the first section being disposed at the bottom of the battery cell; a second section, the second section being disposed on one side of the first section in the second direction, and at least a portion of the second section being disposed on the outer side of the periphery of the battery core to form the connecting portion; A bending section connects the first section and the second section, and in a direction from the first section to the second section, the bending section extends obliquely downward.

4. The battery assembly according to claim 3, characterized in that: In the second direction, the length of the first section extending from the edge of the battery cell to the interior of the battery cell is 20 mm-200 mm.

5. The battery assembly according to claim 1, characterized in that: The fixing plate comprises: A first layer of plate, the first layer of plate being arranged at the bottom of the battery cell; The second layer plate is connected to the first layer plate and is arranged on the lower side of the first layer plate, and at least a portion of the second layer plate is arranged on the outer side of the periphery of the battery core to form the connecting portion.

6. The battery assembly according to claim 5, characterized in that: The first layer of plate is a polymer composite material, and / or the second layer of plate is a metal part.

7. The battery assembly according to claim 1, characterized in that: The battery core is bonded and connected to the fixing plate.

8. The battery assembly according to claim 1, characterized in that: include: A heat spreader, the heat spreader is arranged on the top of the battery cell, The battery assembly further includes a baffle, which is disposed on both sides of the battery cell in the first direction, and the heat spreader is connected to the baffle.

9. The battery assembly according to claim 8, characterized in that: The edges of both sides of the heat spreader in the first direction are bent downwards to be connected to the baffle.

10. A battery pack, characterized in that: It comprises a box body and a battery assembly according to any one of claims 1 to 9, wherein the battery assembly is arranged in the box body.

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