Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module comprises a battery cell stacking body, a battery pack and a battery pack, the two end plate assemblies are located on the two opposite sides of the battery cell stacking body in the length direction of the battery cell stacking body respectively, mounting grooves are formed in the sides, away from the battery cell stacking body, of the end plate assemblies, and the mounting grooves extend in the width direction of the battery cell stacking body; the end plate assembly comprises an upper plate section located above the mounting groove, the mounting groove comprises a blocking structure arranged at the groove bottom opposite to the upper plate section, the blocking structure extends in the height direction of the cell stack, and a mounting gap is formed between the blocking structure and the upper plate section; and the binding band is arranged around the two end plate assemblies and the battery cell stacking body, and a part of the binding band is mounted in the mounting groove through the mounting gap. The battery module and the battery pack provided by the utility model are simple in structure, convenient to manufacture and high in stability, and the problem that the bandage falls off when the battery module is put into a box can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and battery pack. Background Technology

[0002] A battery pack is a complete unit assembled from multiple battery modules, used to store and provide electrical energy. Battery modules are typically bound together with end plates using straps. However, existing battery modules are prone to strap detachment during installation into the battery pack housing; therefore, there is an urgent need for a more stable battery module. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a battery module and battery pack to solve the related problems mentioned in the background art.

[0004] A first aspect of this application provides a battery module, comprising: a cell stack; two end plate assemblies, respectively located on opposite sides of the cell stack along its length, wherein the end plate assembly has a mounting groove on the side away from the cell stack, the mounting groove extending along the width direction of the cell stack; the end plate assembly includes an upper plate segment located above the mounting groove, the mounting groove includes a blocking structure at the bottom of the groove opposite to the upper plate segment, the blocking structure extending along the height direction of the cell stack, and a mounting gap forming between the blocking structure and the upper plate segment; and a strap, disposed around the two end plate assemblies and the cell stack, wherein a portion of the strap is mounted into the mounting groove via the mounting gap.

[0005] Furthermore, the end plate assembly includes a first plate and a second plate stacked along the length direction. The first plate is made of plastic, and the second plate is made of metal. The first plate is disposed close to the cell stack, and the second plate is provided with the mounting groove and the blocking structure.

[0006] Furthermore, an elastic limiting member is provided on the side of the upper plate segment away from the cell stack, and the elastic limiting member is located above the mounting gap for opening or at least partially covering the mounting gap.

[0007] Furthermore, the second plate is provided with a through hole extending along the length direction, the through hole being located near the mounting gap; the first plate is provided with a protrusion on the side near the second plate, the protrusion being inserted into the through hole, and the elastic limiting member being provided on the side of the protrusion away from the first plate.

[0008] Furthermore, the blocking structure is a baffle, the elastic limiting member is a spring sheet, and the deformation direction of the spring sheet is parallel to the length direction.

[0009] Furthermore, there are multiple blocking structures and elastic limiting members, with each blocking structure corresponding to at least one elastic limiting member.

[0010] Furthermore, a positioning block is provided at the bottom of the side of the second plate away from the first plate.

[0011] Furthermore, a pressure block is provided on the top side of the first plate near the second plate, the pressure block abutting against the top of the second plate; and / or, the first plate is provided with arms on opposite sides along the width direction, the arms being located between the cell stack and the binding strap, and extending along the length direction.

[0012] A second aspect of this application provides a battery pack including a mating housing and a top cover, wherein the housing houses a battery module as described in the first aspect above.

[0013] Furthermore, the bottom of the housing is provided with a mating beam, which abuts against the end plate assembly of the battery module. The bottom of the mating beam near the end plate assembly is provided with a slot, and the bottom of the end plate assembly near the mating beam is provided with a positioning block, which engages with the slot.

[0014] As can be seen from the above description, the battery module and battery pack provided in this application include: a cell stack; two end plate assemblies, respectively located on opposite sides of the cell stack along its length, with a mounting groove on the side of the end plate assembly away from the cell stack, extending along the width direction of the cell stack; the end plate assembly includes an upper plate segment above the mounting groove, the mounting groove includes a blocking structure at the bottom of the groove opposite to the upper plate segment, the blocking structure extending along the height direction of the cell stack, forming a mounting gap between the blocking structure and the upper plate segment; and a strap, surrounding the two end plate assemblies and the cell stack, with a portion of the strap installed into the mounting groove via the mounting gap. By providing a mounting groove on the end plate assembly to accommodate the strap, a fixing effect can be achieved, ensuring the binding effect; the blocking structure at the bottom of the mounting groove can prevent the strap from coming out of the mounting groove, ensuring the stability of the battery module; the mounting gap formed by the blocking structure and the upper plate segment facilitates the installation of the strap into the mounting groove. The battery module and battery pack have a simple structure, are easy to manufacture, and have strong stability, which can effectively improve the problem of the straps falling off when the battery module is put into the box. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of a battery module according to an embodiment of this application;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 2 Cross-sectional schematic diagram of the mid-end plate assembly;

[0019] Figure 4 for Figure 2 Exploded view of the mid-end board assembly;

[0020] Figure 5 This is a partial cross-sectional schematic diagram of a battery pack according to an embodiment of this application.

[0021] Reference numerals in the attached drawings: 1. Cell stack; 2. End plate assembly; 2-1. Upper plate segment; 3. First plate; 3-1. Protrusion; 3-2. Pressure block; 3-3. Arm; 4. Second plate; 4-1. Mounting groove; 4-2. Blocking structure; 4-3. Mounting gap; 4-4. Through hole; 4-5. Positioning block; 5. Strap; 6. Elastic limiting component; 7. Housing; 7-1. Matching beam; 7-2. Slot. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] The following describes specific embodiments in conjunction with the appendix. Figures 1 to 5 The technical solution of this application will be further described in detail.

[0025] In some embodiments of this application, a battery module is provided, including: a cell stack 1; two end plate assemblies 2, respectively located on opposite sides of the cell stack 1 along its length direction, the side of the end plate assembly 2 away from the cell stack 1 having a mounting groove 4-1, the mounting groove 4-1 extending along the width direction of the cell stack 1; the end plate assembly 2 including an upper plate segment 2-1 located above the mounting groove 4-1, the mounting groove 4-1 including a blocking structure 4-2 at the bottom of the groove opposite to the upper plate segment 2-1, the blocking structure 4-2 extending along the height direction of the cell stack 1, and a mounting gap 4-3 formed between the blocking structure 4-2 and the upper plate segment 2-1; and a strap 5, arranged around the two end plate assemblies 2 and the cell stack 1, a portion of the strap 5 being installed into the mounting groove 4-1 via the mounting gap 4-3.

[0026] like Figure 1 The diagram shows a structural schematic of a battery module, which includes a cell stack 1, an end plate assembly 2, and binding straps 5. The cell stack 1 is composed of multiple stacked cells. Figure 1 In the diagram, L represents the length of the cell stack 1, W represents the width of the cell stack 1, and H represents the height of the cell stack 1. An end plate assembly 2 is provided on each side of the cell stack 1 along its length, serving to reinforce the structure. The binding straps 5, such as metal or plastic straps, are used to secure the end plate assemblies 2 and the cell stack 1, binding them together. The number of binding straps 5 is not limited to one or more.

[0027] like Figure 2 As shown, Figure 1The enlarged schematic diagram of the battery module at point A shows that a mounting groove 4-1 is provided on the side of the end plate assembly 2 away from the cell stack 1. There may be one or more mounting grooves 4-1, which can be set one-to-one with the binding straps 5, and the specific configuration is not limited. The mounting grooves 4-1 extend along the width direction of the cell stack 1 to accommodate the binding straps 5, and can fix the binding straps 5 to ensure the binding effect.

[0028] like Figure 3 As shown, Figure 2 A cross-sectional schematic diagram of the end plate assembly 2 of the battery module shows that the mounting groove 4-1 includes a blocking structure 4-2 at the bottom of the groove opposite to the upper plate section 2-1. The blocking structure 4-2 may be, for example, a baffle, a protrusion, etc., and the number may be one or more, without limitation. The blocking structure 4-2 extends along the height direction of the cell stack 1 and can prevent the binding strap 5 from coming out of the mounting groove 4-1, ensuring the stability of the battery module.

[0029] like Figure 3 As shown, the end plate assembly 2 includes an upper plate section 2-1 located above the mounting groove 4-1. An installation gap 4-3 is formed between the blocking structure 4-2 and the upper plate section 2-1. The spacing of the installation gap 4-3 is small, for example, 1.5 to 3.5 times the thickness of the strap, and there is no specific limitation. The strap 5 can be installed into the mounting groove 4-1 through the installation gap 4-3, which not only ensures the installation effect of the strap 5, but also further prevents the strap 5 from falling off.

[0030] The battery module has a simple structure, is easy to manufacture, and has strong stability, which can effectively improve the problem of the strap 5 falling off when the battery module is put into the box.

[0031] In some embodiments, the end plate assembly 2 includes a first plate 3 and a second plate 4 stacked along the length direction. The first plate 3 is made of plastic, and the second plate 4 is made of metal. The first plate 3 is disposed close to the cell stack 1, and the second plate 4 is provided with a mounting groove 4-1 and a blocking structure 4-2.

[0032] like Figure 2 As shown, the end plate assembly 2 includes a first plate 3 and a second plate 4 stacked together. The first plate 3 and the second plate 4 can be bonded together, connected by fasteners, or abutted but not connected, etc., without any specific limitation. The first plate 3 is a plastic plate, which can achieve the effects of heat insulation and electrical insulation. The second plate 4 is a metal plate, whose structural strength is greater than that of the first plate 3, and can withstand the binding force of the strap 5.

[0033] like Figure 3 As shown, the second plate 4 is provided with a mounting groove 4-1 and a blocking structure 4-2 on the side away from the first plate 3. The mounting groove 4-1 and the blocking structure 4-2 can be integrally formed.

[0034] In some embodiments, the upper plate segment 2-1 is provided with an elastic limiting member 6 on the side away from the cell stack 1. The elastic limiting member 6 is located above the mounting gap 4-3 and is used to open or at least partially cover the mounting gap 4-3.

[0035] like Figure 2 As shown, an elastic limiting member 6 is provided on the upper plate section 2-1. The elastic limiting member 6 can be, for example, a spring clip, a spring buckle, etc., and is not specifically limited. The elastic limiting member 6 is located above the installation gap 4-3 and can be open or at least partially cover the installation gap 4-3. Figure 3 As shown, when the elastic limiting member 6 is relaxed, it can at least partially cover the installation gap 4-3, thus preventing the strap 5 from coming out of the installation groove 4-1; when the elastic limiting member 6 is squeezed, it can open the installation gap 4-3, thus allowing the strap 5 to be removed from or installed into the installation groove 4-1.

[0036] In some embodiments, the second plate 4 is provided with a through hole 4-4 extending along the length direction, and the through hole 4-4 is located near the mounting gap 4-3; the first plate 3 is provided with a protrusion 3-1 on the side near the second plate 4, the protrusion 3-1 is inserted into the through hole 4-4, and the side of the protrusion 3-1 away from the first plate 3 is provided with an elastic limiting member 6.

[0037] like Figure 4 As shown, Figure 2 An exploded view of the end plate assembly 2 of the battery module shows that the second plate 4 has two through holes 4-4 extending along its length, located near the mounting gap 4-3. The first plate 3 has a protrusion 3-1 on the side near the second plate 4, which engages with the through holes 4-4 to stably connect the first plate 3 and the second plate 4, thus providing a fixing function.

[0038] An elastic limiting member 6 is provided on the side of the protrusion 3-1 away from the first plate 3. The protrusion 3-1 passes through the through hole 4-4, so that the elastic limiting member 6 can be located above the installation gap 4-3. In addition, when the first plate 3 is a plastic plate, the elastic limiting member 6 can be a plastic spring sheet, which can be integrally molded with the first plate 3, making it more convenient.

[0039] In some embodiments, the blocking structure 4-2 is a baffle, and the elastic limiting member 6 is a spring sheet, the deformation direction of which is parallel to the length direction.

[0040] like Figure 3 As shown, the blocking structure 4-2 is a baffle that can partially block the mounting groove 4-1. A baffle can be set on each side of the mounting groove 4-1 along the width direction to provide a good blocking effect on the strap 5.

[0041] like Figure 3As shown, the elastic limiting member 6 is a spring sheet with a simple structure that can be repeatedly squeezed and reset. The notch of the spring sheet faces the bottom of the second plate 4, so that the deformation direction of the spring sheet is parallel to the length direction. When installing the strap 5, the strap 5 can squeeze the spring sheet to deform, opening the installation gap 4-3, which facilitates the strap 5 entering the installation groove 4-1; after the strap 5 is fully inserted into the installation groove 4-1, the reset part of the spring sheet blocks the installation gap 4-3, which can prevent the strap 5 from coming out of the installation groove 4-1.

[0042] In some embodiments, there are multiple blocking structures 4-2 and elastic limiting members 6, with each blocking structure 4-2 corresponding to at least one elastic limiting member 6.

[0043] like Figure 2 As shown, two blocking structures 4-2 are provided at the mounting slot 4-1, and each blocking structure 4-2 is provided with an elastic limiting member 6 to ensure the stability of the battery module.

[0044] In some embodiments, such as Figure 4 As shown, chamfers can be provided on both sides of the mounting groove 4-1 along the width direction to avoid scratching the strap 5.

[0045] In some embodiments, a positioning block 4-5 is provided at the bottom of the side of the second plate 4 away from the first plate 3.

[0046] like Figure 2 As shown, a positioning block 4-5 is provided on the bottom side of the second plate 4 away from the first plate 3. The number of positioning blocks 4-5 is, for example, one or more, and is not limited. The positioning blocks 4-5 can be engaged with the slots 7-2 of the battery pack housing 7, so that the battery module does not need to be mounted at the end, which meets the fixing requirements of the battery module and improves the space utilization of the battery pack.

[0047] In some embodiments, a pressure block 3-2 is provided on the top side of the first plate 3 near the second plate 4, and the pressure block 3-2 abuts against the top of the second plate 4; and / or, the first plate 3 is provided with arms 3-3 on opposite sides along the width direction, the arms 3-3 being located between the cell stack 1 and the strap 5, and extending along the length direction.

[0048] like Figure 2 As shown, a pressure block 3-2 is provided on the top of the side of the first plate 3 near the second plate 4. The number of pressure blocks 3-2 is one or more, for example, and is not limited. The pressure block 3-2 abuts against the top of the second plate 4 and can play a limiting role.

[0049] like Figure 4 As shown, the first plate 3 has arms 3-3 on both sides opposite to each other along the width direction, as... Figure 2As shown, the arm 3-3 extends along the length direction and is located between the battery cell stack 1 and the strap 5, which can prevent the strap 5 from directly contacting the battery cell stack 1 and causing damage.

[0050] In some embodiments of this application, a battery pack is provided, including a cooperating housing 7 and a top cover, wherein the housing 7 is provided with a battery module as described in any of the above embodiments.

[0051] The battery pack includes a matching housing 7 and a top cover. One or more battery modules are installed inside the housing 7 for protection. This battery pack has strong structural stability and a long service life.

[0052] In some embodiments, the bottom of the housing 7 is provided with a mating beam 7-1, which abuts against the end plate assembly 2 of the battery module. The bottom of the mating beam 7-1 near the end plate assembly 2 is provided with a slot 7-2, and the bottom of the end plate assembly 2 near the mating beam 7-1 is provided with a positioning block 4-5, which engages with the slot 7-2.

[0053] like Figure 5 The diagram shows a partial structural schematic of a battery pack. The bottom of the housing 7 has a mating beam 7-1, which abuts against the second plate 4 of the end plate assembly 2, serving a limiting function. A slot 7-2 is provided on the bottom side of the mating beam 7-1 near the second plate 4, and a positioning block 4-5 is provided on the bottom side of the second plate 4 near the mating beam 7-1. The positioning block 4-5 engages with the slot 7-2 to fix the battery module, reducing the space required for bolt mounting and improving the space utilization of the battery pack.

[0054] Battery packs can be used in electrical devices, including vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0055] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0056] Furthermore, given that details have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that embodiments of this application may be practiced without these details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0057] Although this application has been described in conjunction with embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0058] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized in that, include: Cell stack; Two end plate assemblies are respectively located on opposite sides of the cell stack along its length. The side of the end plate assembly away from the cell stack has a mounting groove, which extends along the width direction of the cell stack. The end plate assembly includes an upper plate segment located above the mounting groove. The mounting groove includes a blocking structure at the bottom of the groove opposite to the upper plate segment. The blocking structure extends along the height direction of the cell stack, and a mounting gap is formed between the blocking structure and the upper plate segment. as well as A strap is provided around the two endplate assemblies and the cell stack, and a portion of the strap is installed into the mounting slot via the mounting gap.

2. The battery module according to claim 1, characterized in that, The end plate assembly includes a first plate and a second plate stacked along the length direction. The first plate is made of plastic, and the second plate is made of metal. The first plate is disposed close to the cell stack, and the second plate is provided with the mounting groove and the blocking structure.

3. The battery module according to claim 2, characterized in that, The upper plate section is provided with an elastic limiting member on the side away from the cell stack. The elastic limiting member is located above the installation gap and is used to open or at least partially cover the installation gap.

4. The battery module according to claim 3, characterized in that, The second plate has a through hole extending along the length direction, and the through hole is located near the mounting gap; the first plate has a protrusion on the side near the second plate, the protrusion is inserted into the through hole, and the elastic limiting member is located on the side of the protrusion away from the first plate.

5. The battery module according to claim 3, characterized in that, The blocking structure is a baffle, and the elastic limiting member is a spring sheet, the deformation direction of which is parallel to the length direction.

6. The battery module according to claim 3, characterized in that, There are multiple blocking structures and elastic limiting members, with each blocking structure corresponding to at least one elastic limiting member.

7. The battery module according to claim 2, characterized in that, The second plate has a positioning block at its bottom on the side away from the first plate.

8. The battery module according to claim 2, characterized in that, The first plate has a pressure block on the top of the side near the second plate, the pressure block abutting against the top of the second plate; and / or, the first plate has arms on opposite sides along the width direction, the arms being located between the cell stack and the binding strap, and extending along the length direction.

9. A battery pack, characterized in that, It includes a matching housing and a top cover, wherein the housing contains a battery module as described in any one of claims 1-8.

10. The battery pack according to claim 9, characterized in that, The bottom of the housing is provided with a mating beam, which abuts against the end plate assembly of the battery module. The bottom of the mating beam near the end plate assembly is provided with a slot, and the bottom of the end plate assembly near the mating beam is provided with a positioning block, which engages with the slot.

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