Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack, and belongs to the technical field of batteries, the battery comprises a shell, the shell is provided with an accommodating cavity and a first hole communicated with the accommodating cavity; the electrode assembly is arranged in the accommodating cavity; the monitoring assembly comprises a base body, a temperature sensing part arranged on the base body and a pressure sensing part arranged on the base body, at least part of the base body is arranged in the first hole in a penetrating mode, and the temperature sensing part and the pressure sensing part are both located in the containing cavity; at least part of the fixing piece penetrates through the base body, and the fixing piece is connected with the shell and the base body so as to fix the base body. According to the invention, temperature and pressure changes in the battery can be monitored in time, the timeliness and accuracy of abnormal condition monitoring of the battery are improved, and the mounting stability of the monitoring assembly is further improved by penetrating the base body through the fixing piece and connecting the shell and the base body.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery and a battery pack. Background Art

[0002] At present, in order to timely monitor abnormal conditions during battery use, temperature measuring devices such as thermocouples are usually attached to the outside of the battery to monitor changes in battery surface temperature in real time.

[0003] However, when a battery has an abnormal condition such as thermal runaway, the temperature needs to be transmitted to the temperature measuring device through the battery casing, which has a certain lag. Therefore, monitoring the temperature changes on the battery surface has relatively poor timeliness and accuracy in monitoring abnormal battery conditions. Utility Model Content

[0004] Purpose of the utility model: An embodiment of the present application provides a battery to solve the above-mentioned technical problems; another purpose of the present application is to provide a battery pack using the above-mentioned battery.

[0005] Technical solution: A battery according to an embodiment of the present application includes:

[0006] A housing, wherein the housing has a receiving cavity and a first hole communicating with the receiving cavity;

[0007] An electrode assembly, wherein the electrode assembly is disposed in the accommodating cavity;

[0008] A monitoring component, the monitoring component comprising a base, a temperature sensing portion provided on the base, and a pressure sensing portion provided on the base, at least a portion of the base is passed through the first hole, and the temperature sensing portion and the pressure sensing portion are both located in the accommodating cavity;

[0009] A fixing member, at least a portion of which passes through the base, and the fixing member connects the housing and the base to fix the base.

[0010] In some embodiments, the substrate includes a base and a positioning portion that are interconnected, the base is passed through the first hole, and the positioning portion is connected to the side of the shell facing away from the electrode assembly, the positioning portion is penetrated by a second hole, a portion of the fixing member is passed through the second hole, and the fixing member is connected to the shell and the positioning portion.

[0011] In some embodiments, a first annular groove is provided on a side of the housing facing away from the electrode assembly, the first annular groove surrounds the first hole, and the first annular groove is connected to the first hole;

[0012] The positioning portion surrounds the base and is embedded in the first annular groove.

[0013] In some embodiments, the housing is provided with a third hole connected to the accommodating cavity, and the third hole is connected to the second hole;

[0014] The fixing member includes a first part, a second part and a third part which are connected to each other, the second part is inserted into the second hole and the third hole, the third part is located in the accommodating cavity, the first part is located on a side of the second part away from the accommodating cavity, and the first part and the third part clamp the positioning part and the shell.

[0015] In some embodiments, the second hole and the third hole are provided in plurality, the second parts are provided in plurality, the plurality of second parts are connected to respectively connect the first part and the third part, and each second part corresponds to each second hole and each third hole.

[0016] In some embodiments, the first portion is disposed around the center of the first hole;

[0017] And / or, the third portion is arranged around the center of the first hole.

[0018] In some embodiments, a second annular groove is provided on a side of the shell facing away from the electrode assembly, the second annular groove surrounds the first annular groove, the second annular groove is connected to the first annular groove, and at least a portion of the first portion is embedded in the second annular groove.

[0019] In some embodiments, the housing is provided with a fourth hole toward the positioning portion, and the fourth hole is connected to the second hole;

[0020] Part of the fixing member is inserted into the second hole and the fourth hole, and the fixing member is threadedly connected to the housing.

[0021] In some embodiments, there are a plurality of the second holes and a plurality of the fourth holes, and there are a plurality of the fixing members, and each fixing member corresponds to each of the second holes and each of the fourth holes.

[0022] In some embodiments, a first annular groove is provided on a side of the housing facing away from the electrode assembly, the first annular groove surrounds the first hole, and the first annular groove is connected to the first hole, and the positioning portion surrounds the base and is embedded in the first annular groove;

[0023] The battery also includes a sealing gasket, which is embedded in the first ring groove, surrounds the base, and is located between the positioning portion and the shell. The sealing gasket is provided with a fifth hole respectively connected to the second hole and the fourth hole, and part of the fixing member is passed through the fifth hole.

[0024] In some embodiments, the housing includes a shell and a top cover connected to each other, the shell and the top cover enclose the accommodating cavity, and at least one of the shell and the top cover is provided with the first hole.

[0025] Correspondingly, a battery pack described in an embodiment of the present application includes the above-mentioned battery.

[0026] Beneficial effects: The battery of the embodiment of the present application includes a shell, an electrode assembly, a monitoring assembly and a fixing member. The shell has a accommodating cavity and a first hole connected to the accommodating cavity; the electrode assembly is arranged in the accommodating cavity; the monitoring assembly includes a substrate, a temperature sensing part arranged in the substrate and a pressure sensing part arranged in the substrate, at least part of the substrate is passed through the first hole, and the temperature sensing part and the pressure sensing part are both located in the accommodating cavity; at least part of the fixing member passes through the substrate, and the fixing member connects the shell and the substrate to fix the substrate. By respectively arranging the temperature sensing part and the pressure sensing part in the accommodating cavity, the internal temperature and pressure changes of the battery can be monitored in time, thereby improving the timeliness and accuracy of monitoring abnormal conditions of the battery. At the same time, by the fixing member passing through the substrate and connecting the shell and the substrate, the installation stability of the monitoring assembly is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the top cover, monitoring assembly and fixing parts of Example 1 of the present application;

[0029] Figure 2 It is a schematic diagram of the exploded structure of the monitoring assembly and the fixing parts of Example 1 of the present application;

[0030] Figure 3 This is a schematic diagram of the structure of the top cover of the housing viewed from the front in Example 1 of the present application;

[0031] Figure 4 yes Figure 3 Partial cross-sectional view along line AA;

[0032] Figure 5 This is a schematic diagram of the structure of the top cover, monitoring assembly and fixing parts of Example 2 of the present application;

[0033] Figure 6 It is a schematic diagram of the exploded structure of the monitoring assembly and the fixing parts of Example 2 of the present application;

[0034] Figure 7This is a schematic diagram of the structure of the top cover of the housing viewed from the front in Example 2 of the present application;

[0035] Figure 8 yes Figure 3 A partial cross-sectional view along line BB;

[0036] Figure numerals: 1. outer shell; 10. accommodating cavity; 11. first hole; 12. first ring groove; 13. third hole; 14. second ring groove; 15. fourth hole; 16. shell; 17. top cover; 18. pole; 2. electrode assembly; 3. monitoring assembly; 30. substrate; 300. base; 301. positioning part; 3010. second hole; 31. temperature sensing part; 32. pressure sensing part; 33. wiring part; 4. fixing part; 40. first part; 41. second part; 42. third part; 5. sealing gasket; 50. fifth hole. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0039] At present, the abnormal battery monitoring usually adopts wiring harness and temperature measuring thermocouples, which are pasted on the upper surface of the battery cover according to the regional distribution density to monitor the temperature of individual batteries and realize the real-time monitoring of battery abnormalities. The disadvantages of this method are as follows: 1. The temperature measurement monitoring structure is pasted on the outer surface of the top cover. Due to the lag of heat conduction, the temperature measurement monitoring structure cannot monitor the temperature and pressure inside the battery; 2. Since the temperature measurement structure only has a few monitoring points arranged by region, it cannot monitor the situation of each battery; 3. The temperature measurement monitoring structure is pasted on the top cover. When the battery vibrates or water vapor invades, there is a risk of falling off and failure.

[0040] In view of this, refer to Figures 1 to 8 , an embodiment of the present application provides a battery, aiming to overcome at least one of the above-mentioned defects.

[0041] Embodiment 1:

[0042] Reference Figures 1 to 4 The battery includes a shell 1, an electrode assembly 2, a monitoring assembly 3 and a fixing member 4.

[0043] Among them, the shell 1 has a accommodating cavity 10 and a first hole 11 connected to the accommodating cavity 10; the electrode assembly 2 is arranged in the accommodating cavity 10; the monitoring assembly 3 includes a substrate 30, a temperature sensing part 31 arranged on the substrate 30 and a pressure sensing part 32 arranged on the substrate 30, at least part of the substrate 30 is passed through the first hole 11, and the temperature sensing part 31 and the pressure sensing part 32 are both located in the accommodating cavity 10; at least part of the fixing member 4 passes through the substrate 30, and the fixing member 4 connects the shell 1 and the substrate 30 to fix the substrate 30.

[0044] It should be noted that, in some embodiments, referring to Figure 4 It can be understood that the housing 1 includes a shell 16 and a top cover 17 connected to each other, the shell 16 and the top cover 17 enclose a receiving cavity 10, and at least one of the shell 16 and the top cover 17 is provided with a first hole 11. In this embodiment, the first hole 11 is provided on the top cover 17 as an example, and the first hole 11 can be provided on one side of the pole 18 on the top cover 17. In other embodiments, the number and position of the first holes 11 can also be flexibly adjusted as needed.

[0045] It is understandable that, referring to Figures 1 to 4 The monitoring assembly 3 actually further includes a wiring portion 33, which is disposed on the side of the base 30 away from the pressure sensing portion 32 and the temperature sensing portion 31. The wiring portion 33 is used to be disposed outside the accommodating cavity 10 so as to facilitate external wires of the temperature sensing portion 31 and the pressure sensing portion 32. The temperature sensing portion 31 and the pressure sensing portion 32 can adopt conventional temperature and pressure sensors, and the use principle thereof is the prior art and will not be repeated here.

[0046] By arranging the temperature sensing part 31 and the pressure sensing part 32 in the accommodating cavity 10 respectively, the internal temperature and pressure changes of the battery can be monitored in time, thereby improving the timeliness and accuracy of monitoring battery abnormal conditions. At the same time, the fixing part 4 penetrates the base 30 and connects the outer shell 1 and the base 30, thereby further improving the installation stability of the monitoring component 3.

[0047] In some embodiments, reference Figures 2 to 4 The base 30 includes a base 300 and a positioning portion 301 that are connected to each other. The base 300 is inserted into the first hole 11, and the positioning portion 301 is connected to the side of the top cover 17 away from the electrode assembly 2. The positioning portion 301 is penetrated by a second hole 3010, and part of the fixing member 4 is inserted into the second hole 3010, and the fixing member 4 connects the shell 1 and the positioning portion 301.

[0048] The entire base 30 can actually be quickly mounted on the top cover 17 through the positioning portion 301 , and the cooperation of the base 300 and the first hole 11 can realize the rapid positioning and arrangement of the entire monitoring component 3 , thereby improving the assembly efficiency of the monitoring component 3 and the top cover 17 .

[0049] On this basis, in order to further improve the mounting stability and positioning accuracy of the positioning portion 301, in some embodiments, referring to Figure 2 and Figure 4 A first annular groove 12 is provided on a side of the housing 1 facing away from the electrode assembly 2 . The first annular groove 12 surrounds the first hole 11 and is connected to the first hole 11 . The positioning portion 301 surrounds the base 300 and is embedded in the first annular groove 12 .

[0050] In some embodiments, reference Figure 2 and Figure 4 The top cover 17 is provided with a third hole 13 connected to the accommodating cavity 10, and the third hole 13 is connected to the second hole 3010. In this embodiment, the fixing member 4 includes a first portion 40, a second portion 41 and a third portion 42 connected to each other, the second portion 41 is passed through the second hole 3010 and the third hole 13, the third portion 42 is located in the accommodating cavity 10, the first portion 40 is located on the side of the second portion 41 away from the accommodating cavity 10, and the first portion 40 and the third portion 42 clamp the positioning portion 301 and the housing 1.

[0051] It can be understood that in this embodiment, the fixing member 4 is actually formed by integral injection molding, and the first part 40, the second part 41 and the third part 42 are integrally formed during the injection molding process. The second part 41 passes through the second hole 3010 and the third hole 13 and connects the first part 40 and the third part 42. After molding, the second part 41 and the third part 42 form a sealing effect between the top cover 17 and the base 30 at the first hole 11 on the one hand, and clamp the top cover 17 and the base 30 on the other hand, thereby fixing the entire monitoring component 3. When the top cover 17 vibrates or water vapor invades, it is helpful to reduce the risk of the base 30 falling off, while improving the sealing effect at the first hole 11.

[0052] In order to achieve a better clamping effect, the third part 42 can be designed to be thicker than the first part 40 , and in order not to occupy the internal space of the housing 1 , the third part 42 can be designed to be no thicker than twice the thickness of the first part 40 .

[0053] In order to further improve the fixing effect of the fixing member 4 on the monitoring component 3, in some embodiments, referring to Figure 2 and Figure 4 The first part 40 and the third part 42 are respectively arranged around the center of the first hole 11, and the second hole 3010 and the third hole 13 are respectively provided with a plurality of them. In this embodiment, the second holes 3010 and the third holes 13 are evenly distributed around the first hole 11. Correspondingly, the second part 41 is provided with a plurality of them, and the plurality of second parts 41 are connected to the first part 40 and the third part 42 respectively, and each second part 41 corresponds to each second hole 3010 and each third hole 13.

[0054] The first portion 40 and the third portion 42 form a circumferential surround of the first hole 11 , thereby improving the sealing effect on the first hole 11 and the covering effect on the monitoring component 3 , thereby improving the fixing effect on the monitoring component 3 .

[0055] In some embodiments, reference Figure 2 and Figure 4 A second annular groove 14 is provided on the side of the top cover 17 facing away from the electrode assembly 2 . The second annular groove 14 surrounds the first annular groove 12 and is connected to the first annular groove 12 . At least a portion of the first portion 40 is embedded in the second annular groove 14 .

[0056] It can be understood that in this embodiment, a groove structure connected to the second annular groove 14 is also provided on the actual positioning portion 301. During the injection molding process of the first portion 40, it can cooperate with the second annular groove 14 to form an overall groove structure for accommodating the first portion 40, which is beneficial to form a limit to the injection molding structure of the first portion 40, reduce overflow of the injection molding material of the first portion 40, and at the same time improve the setting stability of the first portion 40.

[0057] Accordingly, an embodiment of the present application provides a battery pack, which includes the above-mentioned battery. The battery pack can be applied to electronic equipment, power storage equipment, or power vehicles and other equipment. It is understood that the battery pack can have all the technical features and corresponding beneficial effects of the above-mentioned batteries, which will not be repeated here.

[0058] Embodiment 2:

[0059] Reference Figures 5 to 8 The difference between this embodiment and the first embodiment is that the top cover 17 is provided with a fourth hole 15 toward the positioning portion 301, and the fourth hole 15 is connected to the second hole 3010. The fixing member 4 can be a screw or other threaded part. Part of the fixing member 4 is passed through the second hole 3010 and the fourth hole 15, and the fixing member 4 is threadedly connected to the top cover 17, so as to facilitate the rapid fixing of the base 30.

[0060] The use of the threaded fixing member 4 is beneficial to improving the overall disassembly and assembly convenience and installation stability of the monitoring component 3.

[0061] In addition, in order to further improve the installation stability of the monitoring component 3, in some embodiments, reference Figure 6 and Figure 8 There are multiple second holes 3010 and multiple fourth holes 15, and the second holes 3010 and the fourth holes 15 are evenly distributed around the first hole 11. Correspondingly, there are multiple fixing members 4, and each fixing member 4 corresponds to each second hole 3010 and each fourth hole 15.

[0062] In order to improve the sealing effect at the first hole 11, in some embodiments, refer to Figure 2 and Figure 4 The battery further includes a sealing gasket 5, which is embedded in the first annular groove 12, surrounds the base 300, and is located between the positioning portion 301 and the housing 1. The sealing gasket 5 is provided with a fifth hole 50 respectively connected to the second hole 3010 and the fourth hole 15, so as to allow the fixing member 4 to pass through when connecting the top cover 17 and the base 30.

[0063] In addition, in some embodiments, glue bonding or welding connection can be added between the base 30 and the shell 1, which is beneficial to improve the sealing effect at the first hole 11 and the fixing stability of the overall monitoring component 3, which will not be repeated here.

[0064] When welding is adopted, the positioning part 301 is made of metal materials such as aluminum, aluminum alloy, stainless steel, etc. The temperature sensing part 31 and the pressure sensing part 32 are made of insulating materials such as polypropylene (PP).

[0065] The above is a detailed introduction to a battery and a battery pack provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing (1), the housing (1) having a receiving cavity (10) and a first hole (11) communicating with the receiving cavity (10); An electrode assembly (2), the electrode assembly (2) being arranged in the accommodating cavity (10); A monitoring component (3), the monitoring component (3) comprising a base (30), a temperature sensing portion (31) disposed on the base (30), and a pressure sensing portion (32) disposed on the base (30), at least a portion of the base (30) passing through the first hole (11), and the temperature sensing portion (31) and the pressure sensing portion (32) are both located in the accommodating cavity (10); A fixing member (4), at least a portion of which passes through the base (30), and the fixing member (4) connects the housing (1) and the base (30) to fix the base (30).

2. The battery according to claim 1, characterized in that The base (30) comprises a base portion (300) and a positioning portion (301) which are connected to each other, the base portion (300) is inserted into the first hole (11), and the positioning portion (301) is connected to the side of the housing (1) facing away from the electrode assembly (2), the positioning portion (301) is penetrated by a second hole (3010), a part of the fixing member (4) is inserted into the second hole (3010), and the fixing member (4) is connected to the housing (1) and the positioning portion (301).

3. The battery according to claim 2, characterized in that A first annular groove (12) is provided on a side of the housing (1) facing away from the electrode assembly (2), the first annular groove (12) surrounds the first hole (11), and the first annular groove (12) is connected to the first hole (11); The positioning portion (301) surrounds the base (300) and is embedded in the first annular groove (12).

4. The battery according to claim 3, characterized in that The housing (1) is provided with a third hole (13) connected to the accommodating cavity (10), and the third hole (13) is connected to the second hole (3010); The fixing member (4) comprises a first portion (40), a second portion (41) and a third portion (42) which are connected to each other; the second portion (41) is inserted into the second hole (3010) and the third hole (13); the third portion (42) is located in the accommodating cavity (10); the first portion (40) is located on a side of the second portion (41) away from the accommodating cavity (10); and the first portion (40) and the third portion (42) clamp the positioning portion (301) and the housing (1).

5. The battery according to claim 4, characterized in that The second hole (3010) and the third hole (13) are provided in plurality, and the second part (41) is provided in plurality. The plurality of second parts (41) are connected to respectively connect the first part (40) and the third part (42), and each second part (41) corresponds to each second hole (3010) and each third hole (13).

6. The battery according to claim 4, characterized in that The first portion (40) is arranged around the center of the first hole (11); And / or, the third portion (42) is arranged around the center of the first hole (11).

7. The battery according to claim 6, characterized in that A second annular groove (14) is provided on a side of the housing (1) facing away from the electrode assembly (2); the second annular groove (14) surrounds the first annular groove (12), and the second annular groove (14) is connected to the first annular groove (12); at least a portion of the first portion (40) is embedded in the second annular groove (14).

8. The battery according to claim 2, characterized in that The housing (1) is provided with a fourth hole (15) toward the positioning portion (301), and the fourth hole (15) is connected to the second hole (3010); Part of the fixing member (4) is inserted into the second hole (3010) and the fourth hole (15), and the fixing member (4) is threadedly connected to the housing (1).

9. The battery according to claim 8, characterized in that There are a plurality of the second holes (3010) and the fourth holes (15), respectively, and there are a plurality of the fixing members (4), each fixing member (4) corresponding to each of the second holes (3010) and each of the fourth holes (15).

10. The battery according to claim 8, characterized in that A first annular groove (12) is provided on a side of the housing (1) facing away from the electrode assembly (2), the first annular groove (12) surrounds the first hole (11), and the first annular groove (12) is connected to the first hole (11), and the positioning portion (301) surrounds the base (300) and is embedded in the first annular groove (12); The battery further comprises a sealing gasket (5), wherein the sealing gasket (5) is embedded in the first annular groove (12), the sealing gasket (5) surrounds the base (300), and the sealing gasket (5) is located between the positioning portion (301) and the housing (1), the sealing gasket (5) is provided with a fifth hole (50) respectively connected to the second hole (3010) and the fourth hole (15), and a portion of the fixing member (4) is passed through the fifth hole (50).

11. The battery according to any one of claims 1 to 10, characterized in that The housing (1) comprises a shell (16) and a top cover (17) which are connected to each other, wherein the shell (16) and the top cover (17) enclose the accommodating cavity (10), and at least one of the shell (16) and the top cover (17) is provided with the first hole (11).

12. A battery pack, characterized in that: Comprising the battery as claimed in any one of claims 1 to 11.

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