Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, the battery pack comprises an insulation protection piece, a first layer of battery assembly and a second layer of battery assembly, the second layer of battery assembly is arranged above the first layer of battery assembly, the insulation protection part is coated on the electric connection part of the first-layer battery assembly and / or the second-layer battery assembly, and at least one part of the insulation protection part is positioned between the first-layer battery assembly and the second-layer battery assembly. According to the battery pack disclosed by the utility model, the service life of the battery pack is prolonged, and the use safety of the battery pack is improved.

Description

Technical Field

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

[0002] However, when the battery pack experiences thermal runaway, the electrolyte will spray out and flow outside the battery module, or flow to the battery cells, connectors and metal structural parts of the battery module. The electrolyte conduction may cause a short circuit or fire, and the electrolyte conduction may also cause arcing in the battery pack, reducing the service life of the battery and the safety 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, one purpose of the utility model is to provide a battery pack, which prolongs the service life of the battery pack and improves the safety of the battery pack.

[0004] Another object of the present invention is to provide an electrical device using the battery pack.

[0005] According to the battery pack of the first aspect embodiment of the utility model, the battery pack includes an insulating protective member, a first layer of battery components and a second layer of battery components, the second layer of battery components is arranged above the first layer of battery components, the insulating protective member is coated on the electrical connection parts of the first layer of battery components and / or the second layer of battery components, and at least a portion of the insulating protective member is located between the first layer of battery components and the second layer of battery components.

[0006] According to the insulating protective member for the battery pack of the utility model, by coating the insulating protective member outside the electrical connection part of the first layer battery assembly or the electrical connection part of the second layer battery assembly, the electrical connection part of the first layer battery assembly or the electrical connection part of the second layer battery assembly is protected, the first layer battery assembly is prevented from participating in arcing or short circuit, and the electrical connection part of the first layer battery assembly or the electrical connection part of the second layer battery assembly is also avoided from being damaged, thereby extending the service life of the first layer battery assembly or the second layer battery assembly, extending the service life of the battery pack, and improving the safety performance of the battery pack. In addition, the electrolyte or other fluid left in the upper layer is isolated from contacting with the upper metal shell of the first layer battery assembly or the electrolyte or other fluid in the lower layer is isolated from contacting with the lower metal shell of the second layer battery assembly, thereby avoiding the occurrence of arcing problems, thereby further extending the service life of the battery assembly (for example, the battery assembly can be the first layer battery assembly and / or the second layer battery assembly), and improving the safety of the battery assembly. In addition, the isolating fluid contacts the upper metal shell of the first battery assembly or the lower metal shell of the second battery assembly, thereby preventing abnormally charged metal parts such as the first battery assembly 201 and the second battery assembly from being connected and causing arcing and fire.

[0007] According to some embodiments of the utility model, the insulating protective member covers the electrical connection parts of the multiple battery cells of the first layer battery assembly or the second layer battery assembly, and the electrical connection parts include the poles of the battery cells, the electrical connectors connecting the multiple battery cells and at least a portion of the battery cell shell.

[0008] According to some embodiments of the utility model, the electrical connection portion is located on the side of the first layer of battery components or the second layer of battery components; the insulating protective member includes: a first protective segment, the first protective segment covers at least a portion of the surface of the first layer of battery components facing the second layer of battery components, or the first protective segment covers at least a portion of the surface of the second layer of battery components facing the first layer of battery components, and the first protective segment is located between the first layer of battery components and the second layer of battery components; a second protective segment, one end of the second protective segment is connected to the first protective segment, and the other end of the second protective segment extends to the side of the first layer of battery components or the second layer of battery components and covers the electrical connection portion.

[0009] According to some embodiments of the present invention, the second protective segment is attached to the side surface of the first layer of battery components or the second layer of battery components.

[0010] According to some embodiments of the utility model, the first protective segment is bonded to at least a portion of the surface of the first layer of battery assembly facing the second layer of battery assembly, or the first protective segment is bonded to at least a portion of the surface of the second layer of battery assembly facing the first layer of battery assembly, and / or the second protective segment is bonded to the side of the first layer of battery assembly or the second layer of battery assembly.

[0011] According to some embodiments of the utility model, the insulating protective member further includes: a first connecting section, the first connecting section is connected between the first protective section and the one end of the second protective section, and extends obliquely from the first protective section toward the second protective section and the first connecting section toward a direction away from the free end of the first protective section.

[0012] According to some embodiments of the present invention, the angle between the first connecting segment and the first protective segment is an obtuse angle, and the angle between the first connecting segment and the second protective segment is an obtuse angle.

[0013] According to some embodiments of the utility model, the insulating protective member further includes: a third protective segment, one end of the third protective segment is connected to the other end of the second protective segment, the other end of the third protective segment covers at least a portion of the bottom surface of the first layer battery assembly, or the other end of the third protective segment covers at least a portion of the top surface of the second layer battery assembly, and the third protective segment is located between the first layer battery assembly or the second layer battery assembly and the shell of the battery pack.

[0014] According to some embodiments of the present invention, the third protective segment is bonded to at least a portion of the bottom surface of the first layer battery assembly, or the third protective segment is bonded to at least a portion of the top surface of the second layer battery assembly.

[0015] According to some embodiments of the present invention, a limiting member is provided on a surface of the third protection segment on one side facing the first protection segment, and the limiting member is disposed adjacent to the second protection segment.

[0016] According to some embodiments of the present invention, a length of the third protection segment in a direction extending away from the electrical connection portion is greater than a length of the first protection segment in a direction extending away from the electrical connection portion.

[0017] According to some embodiments of the utility model, the insulating protective member further includes: a second connecting section, which is connected between the third protective section and the other end of the second protective section, and extends obliquely from the second protective section toward the third protective section and from the second connecting section toward the free end of the third protective section.

[0018] According to some embodiments of the present invention, the angle between the second connecting segment and the third protective segment is an obtuse angle.

[0019] According to some embodiments of the present invention, the insulating protective member is a single-layer structure member or a multi-layer structure member.

[0020] The electrical equipment according to the embodiment of the second aspect of the utility model comprises the battery pack according to the embodiment of the first aspect of the utility model.

[0021] 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

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of an insulating protective member according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 The enlarged view of the A part shown in the middle circle;

[0025] Figure 3 is a schematic diagram of an insulating protective member according to an embodiment of the utility model from another angle;

[0026] Figure 4 Schematic diagram of different states of the insulating protective member according to an embodiment of the utility model, including a flat state of the insulating protective member;

[0027] Figure 5 is a partial schematic diagram of a battery pack according to an embodiment of the utility model;

[0028] Figure 6 yes Figure 5 The enlarged view of the part B shown in the middle circle;

[0029] Figure 7 is a partial schematic diagram of a battery pack according to an embodiment of the utility model from another angle;

[0030] Figure 8 yes Figure 7 Enlarged view of the circled section C.

[0031] Reference numerals:

[0032] 100. Insulation protection parts;

[0033] 1. First protection section; 2. Second protection section; 3. First connecting section;

[0034] 4. The third protection section; 41. The limiter; 5. The second connecting section;

[0035] 200, battery pack;

[0036] 201, first layer battery assembly; 2011, electrical connection part; 2012, battery cell. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 8 A battery pack 200 according to an embodiment of the first aspect of the present invention is described.

[0038] like Figure 1 and Figure 5 As shown, according to the battery pack 200 of the first embodiment of the utility model, the battery pack 200 includes an insulating protective member 100, a first layer of battery components 201 and a second layer of battery components (not shown), and the second layer of battery components is arranged above the first layer of battery components 201. For example, Figure 5 In the example, the second layer of battery components and the first layer of battery components 201 are arranged in sequence from top to bottom. This arrangement increases the number of battery components in the battery pack 200, thereby increasing the power of the battery pack 200. When the battery pack 200 is used in an electric device (such as a vehicle), it helps to improve the endurance of the vehicle.

[0039] Combination Figure 1 and Figure 5 The insulating protective member 100 is coated on the electrical connection part 2011 of the first layer battery assembly 201 and / or the second layer battery assembly, and at least a part of the insulating protective member 100 is located between the first layer battery assembly 201 and the second layer battery assembly. Figure 1 and Figure 5 In the example, the setting of the insulating protective member 100 includes the following situations: First, the insulating protective member 100 wraps the electrical connection parts 2011 of the first layer of battery components 201 (such as the poles, connecting plates and battery cell shells of the battery cells 2012) along the outer peripheral surface of the first layer of battery components 201. Second, the insulating protective member 100 wraps the electrical connection parts of the second layer of battery components along the outer peripheral surface of the second layer of battery components. Third, the cross-sectional shape of the insulating protective member 100 is roughly "E"-shaped, and the insulating protective member 100 wraps the electrical connection parts 2011 of the first layer of battery components 201 along the outer peripheral surface of the first layer of battery components 201, and the insulating protective member 100 wraps the electrical connection parts of the second layer of battery components along the outer peripheral surface of the second layer of battery components.

[0040] Thus configured, the insulating protective member 100 has an isolation and protection function. First, the insulating protective member 100 improves the protection of the first-layer battery assembly 201 and / or the second battery assembly, so that when the second-layer battery assembly or the first-layer battery assembly 201 has an extreme working condition causing battery cell leakage or battery cell thermal runaway and electrolyte spraying, it effectively prevents the fluid (such as electrolyte, or other liquids, etc.) from flowing into the electrical connection part 2011 of the first-layer battery assembly 201 and / or the electrical connection part of the second-layer battery assembly, prevents the first-layer battery assembly 201 and / or the second-layer battery assembly from participating in arcing or short circuit, and avoids damage to the electrical connection part 2011 of the first-layer battery assembly 201 and / or the electrical connection part of the second-layer battery assembly, thereby extending the service life of the first-layer battery assembly 201 and / or the second-layer battery assembly, extending the service life of the battery pack 200, and improving the safety performance of the battery pack 200.

[0041] Second, the electrolyte or other fluid left in the upper layer is isolated from the upper metal shell (such as a liquid cooling plate or other metal structural parts) of the first layer battery assembly 201, and / or the electrolyte or other fluid in the lower layer is prevented from contacting with the lower metal shell of the second layer battery assembly, thereby preventing the fluid from being connected to the metal shell of the first layer battery assembly 201 and / or the metal shell of the second layer battery assembly under the capillary action of the fluid, thereby avoiding the occurrence of arcing problems, avoiding damage to the first layer battery assembly 201 and / or the second layer battery assembly, and further extending the service life of the first layer battery assembly 201 and / or the second layer battery assembly, and further improving the safety of the first layer battery assembly 201 and / or the second layer battery assembly. Third, the fluid is isolated from contacting with the upper metal shell of the first layer battery assembly 201 and / or the lower metal shell of the second layer battery assembly, thereby preventing abnormally charged metal parts such as the first layer battery assembly 201 and / or the second layer battery assembly from being connected, and arcing and fire phenomena from occurring.

[0042] It should be noted that the insulating protective member 100 can simultaneously cover the electrical connection part 2011 of the first layer battery assembly 201 and the electrical connection part of the second layer battery assembly, and the electrical connection part 2011 of the first layer battery assembly 201 and the electrical connection part of the second layer battery assembly are separated by the insulating protective member 100. Alternatively, as shown in the structure of the insulating protective member 100 described below in this application, one insulating protective member 100 can be provided in the battery pack 200 to cover the first layer battery assembly 201 or the second layer battery assembly, or two insulating protective members 100 are provided, and the two insulating protective members 100 are symmetrically arranged about the surface where the first layer battery assembly 201 and the second layer battery assembly contact, so that the two insulating protective members 100 respectively cover the first layer battery assembly 201 and the second layer battery assembly.

[0043] According to the battery pack 200 of the utility model, by covering the electrical connection parts 2011 of the first layer battery assembly 201 and / or the electrical connection parts of the second layer battery assembly with an insulating protective member 100, the electrical connection parts 2011 of the first layer battery assembly 201 and / or the electrical connection parts of the second layer battery assembly are protected, the first layer battery assembly 201 and / or the second layer battery assembly are prevented from being involved in arcing or short circuiting, and damage to the electrical connection parts 2011 of the first layer battery assembly 201 and / or the electrical connection parts of the second layer battery assembly is avoided, thereby extending the service life of the first layer battery assembly 201 and / or the second layer battery assembly, extending the service life of the battery pack 200, and improving the safety performance of the battery pack 200.

[0044] In addition, the electrolyte or other fluid left in the upper layer is isolated from contacting with the upper metal shell of the first layer battery assembly 201, and / or the electrolyte or other fluid in the lower layer is isolated from contacting with the lower metal shell of the second layer battery assembly, thereby avoiding the occurrence of arcing problems, thereby further extending the service life of the battery assembly (for example, the battery assembly can be the first layer battery assembly 201 and / or the second layer battery assembly), and improving the safety of the battery assembly. In addition, the isolation fluid is in contact with the upper metal shell of the first layer battery assembly 201 and / or the lower metal shell of the second layer battery assembly, thereby avoiding the abnormally charged metal parts such as the first layer battery assembly 201 and the second layer battery assembly from being connected, and the phenomenon of arcing and fire.

[0045] According to some embodiments of the present invention, referring to Figure 5 and Figure 6 The insulating protective member 100 covers the electrical connection parts 2011 of the plurality of battery cells 2012 of the first layer battery assembly 201 or the second layer battery assembly. The electrical connection parts 2011 include the poles of the battery cells 2012, the electrical connectors connecting the plurality of battery cells 2012, and at least a part of the battery cell shell. In the description of the utility model, the meaning of "plurality" is two or more. For example, in Figure 5 and Figure 6 In the example, the first layer of battery assembly 201 contains multiple battery cells 2012 arranged in the left-right direction, and the second layer of battery assembly contains multiple battery cells arranged in the left-right direction. The poles of the multiple battery cells 2012, the electrical connectors (such as connectors) between the multiple battery cells 2012, and the edges of the multiple battery cell shells close to the insulating protective member 100 (i.e., at least a portion of the battery cell shells) are all wrapped. As a result, the insulating protective member 100 effectively ensures the isolation and protection effect of the electrical connection part 2011, thereby preventing the battery cell 2012 from short-circuiting, thereby further extending the service life of the battery assembly and further improving the safety of the battery assembly.

[0046] According to some embodiments of the present invention, referring to Figure 5and Figure 6 , the electrical connection part 2011 is located on the side of the first layer battery assembly 201 or the second layer battery assembly. Figure 5 and Figure 6 In the example, the electrical connection part 2011 is located on the front side of the battery cell 2012, and the insulating protective member 100 is wrapped around the outer peripheral surface of the front end of the first layer battery assembly 201 or the outer peripheral surface of the front end of the second layer battery assembly to wrap the electrical connection part 2011. Therefore, the position of the electrical connection part 2011 is reasonably set, which is conducive to the normal use of the first layer battery assembly 201 or the second layer battery assembly, and also facilitates the insulating protective member 100 to be wrapped around the electrical connection part 2011. The assembly operation of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly is simple, which reduces the difficulty of assembly, and thus improves the assembly efficiency of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly.

[0047] Combination Figure 1 and Figure 6 The insulating protective member 100 includes a first protective segment 1 and a second protective segment 2. The first protective segment 1 covers at least a portion of the surface of the first layer battery assembly 201 facing the second layer battery assembly, or the first protective segment 1 covers at least a portion of the surface of the second layer battery assembly facing the first layer battery assembly 100. The first protective segment 1 is located between the first layer battery assembly 201 and the second layer battery assembly. One end of the second protective segment 2 is connected to the first protective segment 1, and the other end of the second protective segment 2 extends to the side of the first layer battery assembly 201 or the second layer battery assembly and covers the electrical connection part 2011.

[0048] For example, in Figure 1 and Figure 6 In the example, the first protection segment 1 extends in the front-to-back direction, and the first protection segment 1 wraps the front end edge of the upper surface of the first layer battery assembly 201. The second protection segment 2 extends in the up-down direction, and the upper end of the second protection segment 2 is connected to the front end of the first protection segment 1. The second protection segment 2 wraps the electrical connection part 2011 (such as Figure 6 As shown in FIG. 1 ), or the first protection segment 1 wraps the front edge of the lower surface of the second layer battery assembly 201, the lower end of the second protection segment 2 is connected to the front end of the first protection segment 1, and the second protection segment 2 wraps the electrical connection part of the front side of the second layer battery assembly. Alternatively, the first protection segment 1 and the second protection segment 2 are connected to form an "L"-shaped insulating protection member.

[0049] With such a configuration, the insulating protective member 100 has a simple structure and is easy to produce, thereby improving the production efficiency of the insulating protective member 100. In addition, the contact area between the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly is increased, thereby improving the assembly stability of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly, preventing the insulating protective member 100 from falling off, and thus facilitating the long-term normal use of the first layer battery assembly 201 or the second layer battery assembly. Moreover, the first protective segment 1 is located between the first layer battery assembly 201 and the second layer battery assembly, which can effectively isolate the fluid from flowing into the first layer battery assembly 201 or the second layer battery assembly, thereby further extending the service life of the first layer battery assembly 201 or the second layer battery assembly.

[0050] Further, refer to Figure 5 and Figure 6 , the second protection section 2 is attached to the side of the first layer battery assembly 201 or the second layer battery assembly. Figure 5 and Figure 6 In the example, the second protection segment 2 is attached to the front side of the first layer battery assembly 201 or the second layer battery assembly. Thus, it is effectively ensured that the second protection segment 2 wraps the electrical connection part 2011 of the first layer battery assembly 201 or the electrical connection part of the second layer battery assembly, reduces the gap between the second protection segment 2 and the electrical connection part 2011, ensures that the second protection segment 2 is in full contact with the first layer battery assembly 201 or the second layer battery assembly, thereby further improving the isolation protection effect of the second protection segment 2 on the electrical connection part 2011, and further facilitating the long-term and stable use of the first layer battery assembly 201 or the second layer battery assembly.

[0051] According to some embodiments of the present invention, referring to Figure 6 The first protection segment 1 is bonded to at least a portion of a surface of the first battery assembly 201 facing the second battery assembly, or the first protection segment 1 is bonded to at least a portion of a surface of the second battery assembly facing the first battery assembly 201, and / or the second protection segment 2 is bonded to the side of the first battery assembly 201 or the second battery assembly. Figure 6 In the example, the lower side of the first protective segment 1 is bonded to the edge of the upper side of the first layer battery assembly 201, or the upper side of the first protective segment 1 is bonded to the edge of the lower side of the second layer battery assembly, and / or the inner side of the second protective segment 2 is bonded to the front side of the first layer battery assembly 201 or the second layer battery assembly.

[0052] The arrangement of the first protection segment 1 and the second protection segment 2 includes the following situations: First, the first protection segment 1 is bonded to at least a portion of the surface of the first layer battery assembly 201 facing the second layer battery assembly. Second, the first protection segment 1 is bonded to at least a portion of the surface of the second layer battery assembly facing the first layer battery assembly 201 (not shown). Third, the first protection segment 1 is bonded to at least a portion of the surface of the first layer battery assembly 201 facing the second layer battery assembly, and the second protection segment 2 is bonded to the side of the first layer battery assembly 201. Fourth, the first protection segment 1 is bonded to at least a portion of the surface of the second layer battery assembly facing the first layer battery assembly 201, and the second protection segment 2 is bonded to the side of the second layer battery assembly (not shown).

[0053] Such a configuration strengthens the connection strength between the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly, and the insulating protective member 100 is not easy to fall off the first layer battery assembly 201 or the second layer battery assembly, and also reduces the gap between the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly, thereby further improving the assembly stability of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly, and further improving the use stability of the battery pack 200. However, it is not limited to this. It should be noted that in addition to the bonding method, composite methods such as adsorption or hot pressing can also be used.

[0054] Optionally, a cold plate (not shown) may be provided between the first layer of battery assembly 201 and the second layer of battery assembly, and the first protection section 1 is located on the upper surface or the lower surface of the cold plate. Thus, the cold plate effectively cools the first layer of battery assembly 201 and the second layer of battery assembly, and the safety of the battery pack 100 is also improved.

[0055] According to some embodiments of the present invention, referring to Figure 3 The insulating protective member 100 further includes a first connecting segment 3, which is connected between the first protective segment 1 and one end of the second protective segment 2, and extends obliquely from the first protective segment 1 toward the second protective segment 2 and away from the free end of the first protective segment 1 (i.e., the rear end of the first protective segment 1). Figure 3 In the example, the upper end of the first connecting segment 3 is connected to the front end of the first protective segment 1, and the lower end of the first connecting segment 3 is connected to the upper end of the second protective segment 2, or the lower end of the first connecting segment 3 is connected to the front end of the first protective segment 1, and the upper end of the first connecting segment 3 is connected to the lower end of the second protective segment 2 (not shown in the figure).

[0056] In this way, the first protection section 1 and the second protection section 2 are connected by the inclined first connecting section 3, so that the right-angle corner of the insulating protective member 100 is avoided to cause defects in the insulating protective member 100, and the bending damage between the first protection section 1 and the second protection section 2 is avoided, and the force bearing capacity of the insulating protective member 100 is improved, thereby helping to improve the structural strength of the insulating protective member 100, and further extending the service life of the insulating protective member 100. In addition, it is also convenient for the fluid to flow along the outer peripheral surface of the insulating protective member 100 to the specific guide groove outside the first layer battery assembly 201 or the second layer battery assembly, so as to avoid the fluid stagnation on the insulating protective member 100 and affect the use of the insulating protective member 100, thereby improving the use performance of the insulating protective member 100. In addition, after the first connecting section 3 is connected with the first protection section 1 and the second protection section 2, the insulating protective member 100 can be more closely fitted to the structure of the first layer battery assembly 201 or the second layer battery assembly, thereby improving the assembly sealing of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly.

[0057] According to some embodiments of the present invention, referring to Figure 1 , the angle between the first connecting section 3 and the first protective section 1 is an obtuse angle, and the angle between the first connecting section 3 and the second protective section 2 is an obtuse angle. Because the poles and electrical connectors of the battery cell 2012 protrude from the front side of the battery cell 2012. Such a configuration helps to improve the fit between the insulating protective member 100 and the first layer of battery assembly 201 or the second layer of battery assembly, thereby improving the tightness of the assembly of the insulating protective member 100 and the first layer of battery assembly 201 or the second layer of battery assembly, and improving the assembly strength of the insulating protective member 100 and the first layer of battery assembly 201 or the second layer of battery assembly. In addition, the insulating protective member 100 has a simple structure and a reasonable design, and is more adapted to the structure of the battery cell 2012 of the first layer of battery assembly 201 or the structure of the battery cell of the second layer of battery assembly, so as to be more conducive to the full contact between the insulating protective member 100 and the first layer of battery assembly 201 or the second layer of battery assembly.

[0058] According to some embodiments of the present invention, referring to Figure 4 and Figure 7 The insulating protective member 100 further includes a third protective segment 4, one end of the third protective segment 4 is connected to the other end of the second protective segment 2, the other end of the third protective segment 4 covers at least a portion of the bottom surface of the first layer battery assembly 201, or the other end of the third protective segment 4 covers at least a portion of the top surface of the second layer battery assembly, and the third protective segment 4 is located between the first layer battery assembly 201 or the second layer battery assembly and the shell of the battery pack 200.

[0059] For example, in Figure 4 and Figure 7In the example, the front end of the battery pack 200 is used as an example for explanation, the third protection segment 4 extends in the front-to-back direction, the upper side of the third protection segment 4 is connected to the front edge of the lower side of the first layer of battery assembly 201, the front end of the third protection segment 4 is connected to the lower end of the second protection segment 2, or the lower side of the third protection segment 4 is connected to the front edge of the upper side of the second layer of battery assembly, and the front end of the third protection segment 4 is connected to the upper end of the second protection segment 2. For example, the insulating protective member 100 can be set to be roughly "C" shaped.

[0060] With such a configuration, the contact area between the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly is further increased through the third protective segment 4, thereby further increasing the wrapping area of ​​the insulating protective member 100 on the first layer battery assembly 201 or the second layer battery assembly, further preventing the fluid from flowing onto the first layer battery assembly 201 or the second layer battery assembly, thereby further extending the normal use time of the first layer battery assembly 201 or the second layer battery assembly. In addition, the assembly stability of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly is further improved, thereby further improving the use stability of the battery pack 200.

[0061] According to some embodiments of the present invention, referring to Figure 7 , the third protection segment 4 is bonded to at least a portion of the bottom surface of the first layer battery assembly 201, or the third protection segment 4 is bonded to at least a portion of the top surface of the second layer battery assembly. Figure 7 In the example, the upper side of the third protective segment 4 is bonded to the front edge of the lower side of the first layer battery assembly 201, or the lower side of the third protective segment 4 is bonded to the front edge of the upper side of the second layer battery assembly. As a result, the connection strength between the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly is further strengthened, thereby further improving the assembly stability of the insulating protective member 100 and the first layer battery assembly 201 or the second layer battery assembly, thereby improving the use stability of the battery pack 200. But not limited to this. It should be noted that in addition to the bonding method, composite methods such as adsorption or hot pressing can also be used.

[0062] Optionally, the lower side of the first protective segment 1 and the upper side of the first layer of battery assembly 201, as well as the upper side of the first protective segment 1 and the lower side of the second layer of battery assembly, can be connected by adhesive bonding or fixedly connected by gluing. The lower side of the third protective segment 4 and the upper side of the tray of the battery pack 200 are connected by adhesive bonding or adhesive bonding, and the upper side of the third protective segment 4 and the lower side of the first layer of battery assembly 201 are connected by adhesive bonding or adhesive bonding, or the lower side of the third protective segment 4 and the upper side of the second layer of battery assembly are connected by adhesive bonding or adhesive bonding. As a result, the operation is simple and the assembly is convenient, thereby improving the assembly efficiency of the insulating protective member 100 and the battery pack 200. In addition, the connection between the insulating protective member 100 and the first layer of battery assembly 201 is also made more secure.

[0063] Optionally, the glue used in the present application may be an electrolyte-resistant glue (such as a structural glue or a thermally conductive glue). Thus, when the electrolyte flows to the bonding points between the insulating protective member 100 and the second battery assembly, the first layer battery assembly 201 and the tray of the battery pack 200, a good bonding effect can still be maintained.

[0064] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 , Figure 7 and Figure 8 A stopper 41 is provided on a surface of the third protection segment 4 facing the first protection segment 1, and the stopper 41 is provided adjacent to the second protection segment 2. Figure 1 , Figure 2 , Figure 7 and Figure 8 In the example, the stopper 41 is located at the end of the upper side of the third protection segment 4 close to the second protection segment 2, and the stopper 41 is located at the lower side of the battery cell 2012. Therefore, when the third protection segment 4 is bonded to the lower side of the first layer battery assembly 201 by glue, the stopper 41 can be used to limit the height of the glue, so as to facilitate the reasonable control of the amount of glue used, thereby improving the connection strength between the third protection segment 4 and the first layer battery assembly 201, reducing the amount of glue used, and reducing the production cost of the battery pack 200. In addition, it helps to neatly arrange the multiple battery cells 2012 of the first layer battery assembly 201 on the stopper 41, thereby improving the use stability of the first layer battery assembly 201, and then improving the use stability of the battery pack 200.

[0065] According to some embodiments of the present invention, referring to Figure 3 , the length of the third protection segment 4 in the direction extending away from the electrical connection portion 2011 is greater than the length of the first protection segment 1 in the direction extending away from the electrical connection portion 2011. Figure 3In the example, along the front-to-back direction, the length of the third protection segment 4 is greater than the length of the first protection segment 1. In this way, the contact area between the third protection segment 4 and the first layer battery assembly 201 is greater than the contact area between the first protection segment 1 and the first layer battery assembly 201, thereby further increasing the sealing of the connection between the insulating protective member 100 and the lower side of the first layer battery assembly 201, preventing the fluid from flowing along the outer peripheral surface of the insulating protective member 100 to the lower side of the first layer insulating protective member 100, thereby helping to further improve the safety of the first layer battery assembly 201. But not limited to this. It should be noted that along the front-to-back direction, the length of the third protection segment 4 can also be equal to or less than the length of the first protection segment 1, which can be set according to the actual usage. For example, the length of the first protection segment 1 is L1, and the length of the third protection segment 4 is L2, where L1 and L2 satisfy: 10cm≤L1≤15cm, L2 is greater than or equal to 10cm, and L2 is less than or equal to the length of the battery cell along the front-to-back direction or the length of the tray of the battery pack 200 along the front-to-back direction.

[0066] Optionally, when the number of cells 2012 of the first layer battery assembly 201 and the number of cells of the second layer battery assembly are not much different, the length of the insulating protective member 100 along the left-right direction is the same as the length of the first layer battery assembly 201 along the left-right direction. When the number of cells 2012 of the first layer battery assembly 201 and the number of cells of the second layer battery assembly are greatly different, the above-mentioned length of the insulating protective member 100 is about 30cm-20cm longer than the length of the second layer battery assembly or the first layer battery assembly 201 along the left-right direction, that is, the left and right ends are 15cm-10cm long respectively. Such a setting effectively prevents the electrolyte from flowing to the first layer battery assembly 201, thereby helping to extend the service life of the first layer battery assembly 201 and also helping to improve the safety of the use of the first layer battery assembly 201. In addition, the material consumption of the insulating protective member 100 is also reduced, thereby reducing the production cost of the insulating protective member 100. But it is not limited to this. For example, the length of the insulating protective member 100 is 20 cm longer than the length of the second layer battery assembly or the first layer battery assembly 201 in the left-right direction, that is, the left and right ends are 10 cm longer respectively.

[0067] According to some embodiments of the present invention, the insulating protective member 100 further includes a second connecting section 5. Figure 1 and Figure 4 The second connecting section 5 is connected between the third protection section 4 and the other end of the second protection section 2, and extends obliquely from the direction of the second protection section 2 toward the third protection section 4 and the direction of the second connecting section 5 toward the free end of the third protection section 4 (that is, the rear end of the third protection section 4). Figure 4In the example, the upper end of the second connecting segment 5 is connected to the lower end of the second protective segment 2, and the lower end of the second connecting segment 5 is connected to the front end of the third protective segment 4, or the lower end of the second connecting segment 5 is connected to the upper end of the second protective segment 2, and the upper end of the second connecting segment 5 is connected to the front end of the third protective segment 4.

[0068] In this way, the second protection section 2 and the third protection section 4 are connected by the inclined second connecting section 5, so that the right-angle corner of the insulating protective member 100 is avoided to cause defects in the insulating protective member 100, and the bending damage between the second protective member 2 and the third protective member 4 is avoided, and the force bearing capacity of the insulating protective member 100 is improved, thereby helping to improve the structural strength of the insulating protective member 100, and further extending the service life of the insulating protective member 100. In addition, it is also convenient for the fluid to flow back along the outer peripheral surface of the insulating protective member 100 to the first layer of battery assembly 201 or the second layer of battery assembly, so as to avoid the fluid stagnation on the insulating protective member 100 and affect the use of the insulating protective member 100, thereby improving the use performance of the insulating protective member 100. In addition, after the heat diffusion of the battery pack 200, the insulating protective member 100 can suppress the point where the short circuit or arcing occurs, thereby suppressing the risk of fire, so as to solve the risk of electrolyte conduction and arcing between the second layer of battery assembly and the first layer of battery assembly 201. Moreover, the effect of improving the space utilization of battery assembly and battery pack is also improved. It should be noted that the insulation structure of the present application is applicable to any battery assembly and battery pack with thermal runaway, and can also guide the design of battery cells.

[0069] According to some embodiments of the utility model, the angle between the second connection section 5 and the third protection section 4 is an obtuse angle. Since the pole and the electrical connector of the battery cell 2012 protrude from the front side of the battery cell 2012. Such a configuration helps to improve the fit between the second connection section 5 and the first layer battery assembly 201 or the second layer battery assembly, thereby improving the tightness of the assembly of the insulating protection member 100 and the first layer battery assembly 201 or the second layer battery assembly, and improving the assembly strength of the insulating protection member 100 and the first layer battery assembly 201 or the second layer battery assembly. In addition, the insulating protection member 100 has a simple structure and is easy to produce and process.

[0070] According to some embodiments of the present invention, the insulating protective member 100 is a single-layer structure or a multi-layer structure. When the insulating protective member 100 is a single-layer structure, the material usage of the insulating protective member 100 is reduced, thereby reducing the production cost of the insulating protective member 100. When the insulating protective member 100 is a multi-layer structure (such as Figure 2 As shown), the thickness of the insulating protective member 100 is increased, thereby improving the structural strength of the insulating protective member 100, and further improving the force-bearing capacity of the insulating protective member 100, which helps to extend the service life of the insulating protective member 100.

[0071] Optionally, when the insulating protective member 100 is a multi-layer structure, the multiple layers of the insulating protective structure are fixed by composite, and the composite includes bonding or hot pressing. As a result, the composite method is simple, which facilitates the bonding of the multiple layers of the insulating protective member 100 together, thereby improving the assembly efficiency of the insulating protective member 100. In addition, the multi-layer structure of the insulating protective member 100 can be the same material or different materials, so that the insulating protective member 100 can be selected for use according to more practical usage conditions, thereby improving the scope of application of the insulating protective member 100. In addition, the insulating protective member 100 can also be a multi-layer structure composited in sections, that is, the number of structural layers of the first protective segment 1, the second protective segment 2, the first connecting segment 3, the third protective segment 4 and the second connecting segment 5 can be the same or different, thereby improving the applicability of the insulating protective member 100.

[0072] According to some embodiments of the present invention, the insulating protective member 100 is a polyethylene terephthalate plastic member, a polyimide member, a polypropylene member, a polycarbonate member, a rubber-plastic cotton member or a mica member. The polyethylene terephthalate plastic member has abrasion resistance, thereby extending the service life of the insulating protective member 100 and improving the production rate of the insulating protective member 100. The polyimide member has high temperature resistance and high insulation performance, thereby helping the insulating protective member 100 to be used under high temperature conditions for a long time, and also avoiding short circuits in the first layer of battery components 201 or the second layer of battery components, thereby extending the service life of the insulating protective member 100 and helping the battery components to be used normally for a long time.

[0073] The polypropylene component has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, which helps the insulating protective component 100 to be used under high temperature conditions for a long time, avoids short circuits in the first layer of battery components 201 or the second layer of battery components, and improves the structural strength of the insulating protective component 100, thereby extending the service life of the insulating protective component 100, and also helps the battery components to be used normally for a long time.

[0074] The polycarbonate parts are flame retardant and antioxidant, thus preventing the insulating protective part 100 from catching fire when the battery pack 200 fails due to heat, thereby extending the service life of the insulating protective part 100. The rubber-plastic cotton parts have the functions of heat preservation and sealing, thereby improving the isolation and protection of the insulating protective part 100, thereby improving the performance of the insulating protective part 100. The mica parts have insulating and high temperature resistant properties, thereby helping the insulating protective part 100 to be used under high temperature conditions for a long time, and also avoiding short circuits in the first layer of battery components 201 or the second layer of battery components, thereby extending the service life of the insulating protective part 100, and also helping the battery components to be used normally for a long time. But not limited to this. It should be noted that the material of the insulating protective part 100 can be a composite material of the above-mentioned materials or one of them.

[0075] Optionally, refer to Figure 5 and Figure 7 The battery pack 200 further includes a tray (not shown) assembly. The first layer of battery assemblies 201 are arranged on the tray, and the second layer of battery assemblies are arranged above the first layer of battery assemblies 201. For example, Figure 5 and Figure 7 In the example, two insulating protective members 100 are provided, and the two insulating protective members 100 respectively wrap the electrical connection parts 2011 at the front and rear ends of the first layer battery assembly 201, or the two insulating protective members 100 respectively wrap the electrical connection parts at the front and rear ends of the second layer battery assembly. Such a configuration effectively prevents the battery pack 200 from short circuiting or arcing, thereby extending the service life of the battery pack 200 and improving the safety performance of the battery pack 200.

[0076] The electrical equipment (shown in the figure) according to the embodiment of the second aspect of the utility model includes the battery pack 200 according to the embodiment of the first aspect of the utility model.

[0077] According to the electric device of the present invention, the use safety of the electric device is improved by adopting the battery pack 200. It should be noted that the electric device may be a vehicle.

[0078] Other structures and operations of the battery pack 200 and the electrical equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0079] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "circumferential" and the like indicating orientations or positional relationships are 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 device or element referred to 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.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 expressions of the above terms do not necessarily refer to the same embodiment or example.

[0081] 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 pack, characterized in that: The battery pack includes an insulating protective member, a first layer of battery assemblies and a second layer of battery assemblies, wherein the second layer of battery assemblies is arranged above the first layer of battery assemblies, the insulating protective member covers the electrical connection parts of the first layer of battery assemblies and / or the second layer of battery assemblies, and at least a portion of the insulating protective member is located between the first layer of battery assemblies and the second layer of battery assemblies.

2. The battery pack according to claim 1, characterized in that: The insulating protective member covers the electrical connection parts of the multiple battery cells of the first layer battery assembly or the second layer battery assembly, and the electrical connection parts include the poles of the battery cells, the electrical connectors connecting the multiple battery cells, and at least a portion of the battery cell shell.

3. The battery pack according to claim 1, characterized in that: The electrical connection part is located on the side of the first layer battery assembly or the second layer battery assembly; The insulating protective member comprises: A first protection segment, wherein the first protection segment covers at least a portion of a surface of the first layer battery assembly facing the second layer battery assembly, or the first protection segment covers at least a portion of a surface of the second layer battery assembly facing the first layer battery assembly, and the first protection segment is located between the first layer battery assembly and the second layer battery assembly; A second protection segment, one end of the second protection segment is connected to the first protection segment, and the other end of the second protection segment extends to the side of the first layer battery component or the second layer battery component and covers the electrical connection part.

4. The battery pack according to claim 3, characterized in that: The second protection section is in contact with the side surface of the first layer of battery components or the second layer of battery components.

5. The battery pack according to claim 3, characterized in that: The first protection segment is bonded to at least a portion of a surface of the first layer of battery components facing the second layer of battery components, or the first protection segment is bonded to at least a portion of a surface of the second layer of battery components facing the first layer of battery components, and / or, The second protection segment is bonded to the side surface of the first layer of battery components or the second layer of battery components.

6. The battery pack according to claim 3, characterized in that: The insulating protective member further comprises: A first connecting section, wherein the first connecting section is connected between the first protection section and the one end of the second protection section, and extends obliquely from the first protection section toward the second protection section and in a direction away from the free end of the first protection section.

7. The battery pack according to claim 6, characterized in that: An angle between the first connecting section and the first protecting section is an obtuse angle, and an angle between the first connecting section and the second protecting section is an obtuse angle.

8. The battery pack according to claim 3, characterized in that: The insulating protective member further comprises: A third protective segment, one end of the third protective segment is connected to the other end of the second protective segment, the other end of the third protective segment covers at least a portion of the bottom surface of the first layer of battery assembly, or the other end of the third protective segment covers at least a portion of the top surface of the second layer of battery assembly, and the third protective segment is located between the first layer of battery assembly or the second layer of battery assembly and the shell of the battery pack.

9. The battery pack according to claim 8, characterized in that: The third protection segment is bonded to at least a portion of the bottom surface of the first layer battery assembly, or the third protection segment is bonded to at least a portion of the top surface of the second layer battery assembly.

10. The battery pack according to claim 8, characterized in that: A limiting member is provided on a surface of the third protection segment on one side facing the first protection segment, and the limiting member is arranged adjacent to the second protection segment.

11. The battery pack according to claim 8, characterized in that: The length of the third protection segment in the direction extending away from the electrical connection portion is greater than the length of the first protection segment in the direction extending away from the electrical connection portion.

12. The battery pack according to claim 8, characterized in that: The insulating protective member further comprises: The second connecting section is connected between the third protection section and the other end of the second protection section, and extends obliquely from the second protection section toward the third protection section and from the second connecting section toward the free end of the third protection section.

13. The battery pack according to claim 12, characterized in that: The included angle between the second connecting segment and the third protecting segment is an obtuse angle.

14. The battery pack according to claim 1, characterized in that: The insulating protective member is a single-layer structural member or a multi-layer structural member.

15. An electrical equipment, characterized in that: Comprising a battery pack according to any one of claims 1-14.

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