Battery pack and electric device

Abstract

The utility model relates to battery technology field provides a kind of battery pack and electrical equipment, battery pack includes: cabinet, its inside is equipped with accommodating space;Battery group includes multiple batteries, multiple batteries are arranged in accommodating space along its thickness direction;Multiple pairs of temperature sensor correspond with multiple batteries respectively, every pair of temperature sensor includes first temperature sensor and second temperature sensor, first temperature sensor and second temperature sensor are used to directly or indirectly sense the temperature of the same corresponding battery;And a pair of temperature control module, including the first temperature control module and the second temperature control module independent of each other, first temperature control module and second temperature control module are electrically connected with first temperature sensor and second temperature sensor respectively.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device including the battery pack. Background Technology

[0002] Battery packs are common energy storage devices, consisting of a casing and batteries housed within it. During operation, batteries generate heat and expand, necessitating temperature sensors to monitor the temperature of each battery to ensure the thermal safety of the battery pack.

[0003] However, traditional battery packs use a single temperature sensor to sense the temperature of each individual battery. For battery packs with thinner casings, especially marine battery packs, this type of temperature sensor can detach from the corresponding battery or even be damaged when subjected to impact. This makes it difficult to ensure continuous temperature sensing of the batteries and thus compromises the thermal safety of the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack that ensures thermal safety, including a housing, a battery pack, multiple pairs of temperature sensors, and a pair of temperature control modules. The housing has an internal receiving space. The battery pack includes multiple batteries arranged along its thickness within the receiving space. The multiple pairs of temperature sensors correspond to the multiple batteries, and each pair includes a first temperature sensor and a second temperature sensor, which are used to directly or indirectly sense the temperature of the same corresponding battery. The pair of temperature control modules includes a first temperature control module and a second temperature control module, which are independent of each other and electrically connected to the first and second temperature sensors, respectively.

[0005] This battery pack configuration uses a first temperature sensor and a second temperature sensor to sense the temperature of a battery, and uses an independent first temperature control module and a second temperature control module to receive signals from the first temperature sensor and the second temperature sensor, respectively. When one of the first temperature sensor and the second temperature sensor detaches or is damaged, the other temperature sensor continues to sense the temperature of the corresponding battery, thereby implementing continuous and reliable thermal sensing and thermal management of the battery pack and ensuring the thermal safety of the battery pack.

[0006] Another aspect of this utility model provides an electrical device having the aforementioned battery pack. Because it has the aforementioned battery pack, this electrical device possesses all the technical effects of the aforementioned battery pack, which will not be elaborated upon here. Attached Figure Description

[0007] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is an exploded view of the battery pack disclosed in this utility model.

[0011] Figure 2 for Figure 1 A schematic diagram of the structure of the battery in the battery pack.

[0012] Figure 3 for Figure 1 A structural schematic diagram of the battery pack from another perspective.

[0013] Figure 4 This is a schematic diagram of another battery pack disclosed in this utility model. For ease of understanding, some components have been omitted.

[0014] Figure 5 for Figure 4 Enlarged view of part A in the image.

[0015] Figure 6 This is a schematic diagram of another battery pack disclosed in this utility model. For ease of understanding, some components have been omitted.

[0016] Figure 7 for Figure 6 Enlarged view of part B in the image.

[0017] Figure 8 This is a schematic diagram of another battery pack disclosed in this utility model. For ease of understanding, some components have been omitted.

[0018] Figure 9 This is a schematic diagram of the structure of an electrical device disclosed in this utility model. Detailed Implementation

[0019] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0020] This utility model embodiment provides a battery pack 100. The battery pack 100 typically includes a battery group consisting of multiple batteries 102 connected in parallel or series, a battery management system (BMS), an electrical connection system, a thermal management system, a support mechanism, and protective components. The support mechanism includes a housing 101, a bracket, a cover plate 1014, etc. The battery group, battery management system (BMS), electrical connection system, and thermal management system are arranged within a receiving space formed by the housing 101, protective components (not shown), and cover plate 1014, and are sealed by a protective mechanism such as a sealant to form a complete functional unit capable of directly outputting electrical energy.

[0021] refer to Figure 1 The battery pack 100 includes a housing 101, multiple batteries 102, multiple pairs of temperature sensors 103, and a pair of temperature control modules 104.

[0022] In this invention, the housing 101 refers to a closed or semi-closed structure made of materials such as metal or plastic, serving as the physical carrier of the battery pack. Its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. The housing 101 can be cast from materials such as steel plates or aluminum alloys, or it can be made from lightweight materials. For example, the housing 101 can be manufactured using materials such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials.

[0023] Battery 102 is an energy storage unit capable of repeated charging and discharging, and can be interpreted as a "secondary battery." In this application, the concept of "secondary battery" can include, but is not limited to, lithium-ion secondary batteries, sodium-ion secondary batteries, lead-acid batteries, and nickel-metal hydride batteries. Battery 102 can be, for example, a prismatic battery, which can be understood as a battery with a square prism shape. Battery 102 can also be a battery with other cross-sectional shapes along its height. The battery pack 100 described in this utility model will be described in detail below using a prismatic battery as an example.

[0024] For ease of understanding, in the attached figures, the X-axis represents the width direction of the battery pack 100, which is also the width direction of the battery 102; the Y-axis represents the thickness direction of the battery pack 100, which is also the thickness direction of the battery 102; and the Z-axis represents the height direction of the battery pack 100, which is also the height direction of the battery 102. The positive direction of the Z-axis indicates the direction from the bottom surface of the battery pack 100 to its top surface, which is also the direction from the bottom surface of the battery 102 to its top surface. The terms "top" or "bottom" used in any element of this disclosure can be used as reference here.

[0025] refer to Figure 1 and Figure 2The housing 101 includes a pair of long sidewalls 1011 arranged opposite each other along the thickness direction, a pair of short sidewalls 1012 arranged opposite each other along the width direction of the battery 102, a bottom wall 1013, and a cover 1014. The housing 101, the cover 1014, and a protective mechanism (not shown), such as a seal, together form a receiving space. Multiple batteries 102 can be arranged in the receiving space formed by the long sidewalls 1011, the short sidewalls 1012, the bottom wall 1013, and the cover 1014. The long sidewalls 1011 of the housing 11 can be opposite to the first wall portion 102a of the battery 102. The bottom surfaces of the multiple batteries 102 can be fixed to the bottom wall 1013 using adhesives, fasteners, etc. Subsequently, components such as strapping can be applied to the multiple batteries 102 to form a battery pack with relatively defined dimensions in the width and thickness directions.

[0026] refer to Figure 2 Each battery 102 includes a first terminal 400 and a second terminal 500 with opposite polarities. The first terminal 400 and the second terminal 500 can be understood, for example, as current output terminals of the battery 102, used to achieve series or parallel connection between adjacent batteries 102. Preferably, the first terminal 400 and the second terminal 500 are located on the surface of the battery 102 facing away from the bottom wall 1013. That is, the first terminal 400 and the second terminal 500 are located on the top surface of the battery 102. At this time, a conductive bus 105 (see below) is used. Figures 3 to 6 The components can be sequentially connected to the first terminal 400 and the second terminal 500 of adjacent batteries 102. A battery pack can be understood as a row of batteries arranged along its thickness direction. A battery pack 100 may include one battery pack or multiple battery packs. The number of batteries 102 in each battery pack can be determined according to the capacity or voltage requirements of the battery pack 100. This utility model does not specifically limit the number of battery packs or the number of batteries 102 contained in a battery pack. The following will further illustrate the battery pack 100 described in this application using a single battery pack as an example.

[0027] In this invention, the term "adjacent batteries" refers to three batteries 102 that are electrically connected and whose orthographic projections along the thickness direction overlap and have the shortest distance between them along the thickness direction. Alternatively, it can refer to two batteries 102 that are electrically connected and whose orthographic projections along the thickness direction overlap and have the shortest distance between them along the thickness direction, and one battery 102 that is electrically connected and whose orthographic projection along the width direction overlaps with the shortest distance between them along the width direction. When there are batteries 102 with the first wall portion 102a facing the long sidewall 1011 of the housing 101, the battery pack may also include only two batteries 102. (See reference...) Figure 4 The area enclosed by the dashed line in the middle indicates that adjacent batteries in the battery pack may include the first battery 1021, the second battery 1022, and the third battery 1023. See also... Figure 6The area outlined by the dashed line may include adjacent batteries in the battery pack, such as the first battery 1021, the second battery 1022, and the third battery 1023.

[0028] The first terminal 400 and the second terminal 500 are often the hottest parts of battery 102. (Reference) Figures 3 to 7 To ensure the thermal safety of the battery pack 100, a pair of temperature sensors 103 are provided on the top of each battery 102, including a first temperature sensor 1031 and a second temperature sensor 1032. The first temperature sensor 1031 and the second temperature sensor 1032 are used to directly or indirectly sense the temperature of the same battery 102.

[0029] The temperature sensor 103 collects the temperature of the battery cell in the battery 102 and sends the collected temperature information to the battery thermal management system (BMS) for temperature sampling. The temperature sensor 103 can be a thermistor. Based on its temperature coefficient, the temperature sensor 103 can be classified as a positive temperature coefficient thermistor (PTC) or a negative temperature coefficient thermistor (NTC). These two types of thermistors represent different temperatures with different resistance values. A PTC thermistor has a higher resistance value at higher temperatures, while an NTC thermistor has a lower resistance value at higher temperatures.

[0030] The temperature sensor 103 can be formed from a material such as a semiconductor ceramic made of oxides of two or more metals selected from manganese, copper, silicon, cobalt, iron, nickel, zinc, etc. Alternatively, the temperature sensor 103 can also be formed from non-oxide materials such as silicon carbide, tin selenide, tantalum nitride, etc. The temperature sensor 103 can be a droplet-type NTC or a surface-mount NTC temperature sensor. A droplet-type NTC temperature sensor includes a droplet-shaped sensor head and a wire connected to the sensor head. A surface-mount NTC temperature sensor includes a generally cuboid-shaped head and a wire connected to the head; the head of the surface-mount NTC temperature sensor can directly contact a thermal pad (not shown) or through a film structure that has minimal impact on temperature transfer.

[0031] In this invention, the term "directly or indirectly sensing" means that the first temperature sensor 1031 and the second temperature sensor 1032 can be directly disposed on the top surface of the same battery 102, or they can be disposed on the surface of a conductive bar 105 connecting adjacent batteries 102, as long as the first temperature sensor 1031 and the second temperature sensor 1032 can achieve temperature sensing of the corresponding battery 102. The battery pack 100 described in this invention will be further described below using the case where the temperature sensors are disposed on the conductive bar 105 as an example.

[0032] The conductive bus 105 includes a connection portion 105a that is electrically connected to the battery 102. On a projection plane perpendicular to the height direction, the orthographic projection of the battery 102 overlaps the orthographic projection of the connection portion 105a. (Reference) Figure 4 The area covered by the shaded part is the two connecting parts 105a of the conductive bar 105, which are respectively connected to the first terminal 400 of one battery and the second terminal 500 of the other battery.

[0033] The temperature at the connection 105a can characterize the temperature at the first terminal 400 and the second terminal 500 of the battery 102. (Reference) Figure 4 and Figure 5 In one possible implementation, the battery pack includes a first battery 1021, a second battery 1022 and a third battery 1023 arranged along the thickness direction, with the first battery 1021 located between the second battery 1022 and the third battery 1023. The battery pack 100 also includes a first conductive bus 1051 and a second conductive bus 1052. The first conductive bus 1051 includes a first connecting portion 1051a and a second connecting portion 1051b, which are respectively connected to the first terminal 400 of the first battery 1021 and the second terminal 500 of the second battery 1022. The second conductive bus 1052 includes a third connecting portion 1052a and a fourth connecting portion 1052b, which are respectively electrically connected to the second terminal 500 of the first battery 1021 and the first terminal 400 of the third battery 1023. A pair of temperature sensors 103, including a first temperature sensor 1031 and a second temperature sensor 1032, are provided on the second connecting portion 1051b for sensing the temperature of the second battery 1022. The third connection portion 1052a is also provided with a pair of temperature sensors 103, including a first temperature sensor 1031 and a second temperature sensor 1032, for sensing the temperature of the first battery 1021. That is, each battery 102 includes a first terminal 400 and a second terminal 500 with different polarities. The battery pack 100 also includes a first conductive bus 1051 and a second conductive bus 1052. The first connection portion 1051a of the first conductive bus 1051 is electrically connected to the first terminal 400, and the third connection portion 1052a of the second conductive bus 1052 is electrically connected to the second terminal 500. The third connection portion 1052a is provided with a pair of temperature sensors 103.

[0034] Also refer to Figure 5 Preferably, the thickness of the battery 102 is t1, in mm. The distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the thickness direction is d1, in mm, where 0.13 ≤ d1 / t1 ≤ 0.6.

[0035] Optionally, the value of d1 / t1 can be: 0.13, 0.15, 0.17, 0.19, 0.21, 0.23, 0.25, 0.27, 0.29, 0.31, 0.33, 0.35, 0.37, 0.39, 0.41, 0.43, 0.45, 0.47, 0.49, 0.51, 0.53, 0.55, 0.57, 0.59, or 0.6. The ratio of d1 / t1 should not be too large or too small. When the ratio of d1 / t1 is too large, that is, when the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the thickness direction is close to or even exceeds the thickness t1 of the battery 102, at least one of the first temperature sensor 1031 and the second temperature sensor 1032 is moved away from the first electrode 400 or the second electrode 500. This will result in the temperatures sensed by the first temperature sensor 1031 and the second temperature sensor 1032 being insufficient to adequately characterize the thermal condition of the battery 102, which will increase the thermal safety risk of the battery pack 100 and bring unnecessary hidden dangers. When the ratio of d1 / t1 is too small, that is, when the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the thickness direction is too close, the temperatures sensed by the first temperature sensor 1031 and the second temperature sensor 1032 may affect each other. When the battery pack 100 is subjected to impacts, the first temperature sensor 1031 and the second temperature sensor 1032 that are too close together may detach or even be damaged simultaneously, which is not conducive to achieving the purpose of ensuring thermal safety of this utility model.

[0036] Also refer to Figure 5 It can be understood that, based on the above range of d1 / t1, the thickness of battery 102, t1, can satisfy 50mm≤t1≤80mm, and / or, the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the thickness direction can satisfy: 10mm≤d1≤30mm.

[0037] Optionally, d1 can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm. A d1 within the above range ensures that the temperature of the battery 102 is detected while minimizing the risk of the first temperature sensor 1031 and the second temperature sensor 1032 detaching or being damaged under impact, thereby ensuring the thermal safety of the battery pack 100.

[0038] Optionally, t1 can be 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 59mm, 60mm, 61mm, 62mm, 63mm, 64mm, 65mm, 66mm, 67mm, 68mm, 69mm, 70mm, 71mm, 72mm, 73mm, 74mm, 75mm, 76mm, 77mm, 78mm, 79mm, or 80mm. A t1 within the above range ensures that the battery pack 100 has a high energy density. In use, t1 can be determined according to the requirements of the battery 102, and then d1 can be determined based on the value of t1.

[0039] refer to Figure 6 and Figure 7 In another possible implementation, the battery pack includes a first battery 1021, a second battery 1022, and a third battery 1023 arranged along the thickness direction, with the first battery 1021 located between the second battery 1022 and the third battery 1023. The battery pack 100 also includes a first conductive bus 1051 and a second conductive bus 1052. The first conductive bus 1051 includes a first connecting portion 1051a and a second connecting portion 1051b, which are respectively connected to the first terminal 400 of the first battery 1021 and the second terminal 500 of the second battery 1022. The second conductive bus 1052 includes a third connecting portion 1052a and a fourth connecting portion 1052b. The third connecting portion 1052a and the fourth connecting portion 1052b are electrically connected to the second terminal 500 of the first battery 1021 and the first terminal 400 of the third battery 1023, respectively. The first temperature sensor 1031 and the second temperature sensor 1032 corresponding to the first battery 1021 are respectively disposed on the first connecting portion 1051a and the third connecting portion 1052a. That is, each battery 102 includes a polarity phase. The battery pack 100 includes a first terminal 400 and a second terminal 500. It also includes a first conductive bus 1051 and a second conductive bus 1052. The first connecting portion 1051a of the first conductive bus 1051 is electrically connected to the first terminal 400, and the third connecting portion 1052a of the second conductive bus 1052 is electrically connected to the second terminal 500. The first temperature sensor 1031 and the second temperature sensor 1032 corresponding to the battery 102 are respectively disposed on the first connecting portion 1051a and the third connecting portion 1052a.

[0040] It should be noted that the electrical connection method of the battery pack and the arrangement of the temperature sensor 103 shown in the above two embodiments are not limitations on the scope of protection. Other arrangements based on the requirements of the battery pack 100 without violating the principles of this utility model should also be included within the scope of protection of this utility model.

[0041] Continue to refer to Figure 7Preferably, the width of the first battery 1021 is w1, in mm. The distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the width direction is d2, in mm, where 0.25 ≤ d2 / w1 ≤ 0.4.

[0042] Optionally, the value of d2 / w1 can be: 0.25, 0.27, 0.29, 0.30, 0.31, 0.33, 0.35, 0.37, 0.39, 0.40, 0.41, 0.43, 0.45, 0.47, 0.49, 0.51, 0.53, 0.55, 0.57, 0.59, or 0.6. The ratio of d2 / w1 should not be too large or too small. When the ratio of d2 / w1 is too large, that is, when the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the width direction is close to or even exceeds the width w1 of the battery 102, at least one of the first temperature sensor 1031 and the second temperature sensor 1032 is moved away from the first terminal 400 or the second terminal 500 of the first battery 1021. This will result in the temperatures sensed by the first temperature sensor 1031 and the second temperature sensor 1032 being insufficient to adequately characterize the thermal condition of the battery 102, increasing the thermal safety risk of the battery pack 100 and bringing unnecessary hidden dangers. When the ratio of d2 / w1 is too small, that is, when the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the width direction is too close, the temperatures sensed by the first temperature sensor 1031 and the second temperature sensor 1032 may affect each other. When the battery pack 100 is subjected to impacts, the first temperature sensor 1031 and the second temperature sensor 1032 that are too close together may detach or even be damaged simultaneously, which is detrimental to achieving the purpose of ensuring thermal safety of this utility model.

[0043] It is understood that, based on the above range of d2 / w1, the width w1 of the first battery 1021 can satisfy 160mm≤w1≤180mm, and / or, the distance between the first temperature sensor 1031 and the second temperature sensor 1032 in the width direction can satisfy: 45mm≤d2≤65mm.

[0044] Optionally, d2 can be 45mm, 46mm, 47mm, 48mm, 49mm, 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 59mm, 60mm, 61mm, 62mm, 63mm, 64mm, or 65mm. A d2 within the above range ensures that while detecting the temperature of the battery 1021, the risk of the first temperature sensor 1031 and the second temperature sensor 1032 simultaneously detaching or being damaged during impacts is low, thereby ensuring the thermal safety of the battery pack 100.

[0045] Optionally, w1 can be 160mm, 161mm, 162mm, 163mm, 164mm, 165mm, 166mm, 167mm, 168mm, 169mm, 170mm, 171mm, 172mm, 173mm, 174mm, 175mm, 176mm, 177mm, 178mm, 179mm, or 180mm. A w1 within the above range ensures that the battery pack 100 has a high energy density. In use, w1 can be determined according to the requirements of the battery 102, and then d2 can be determined based on the value of w1.

[0046] return Figures 4 to 7 The battery pack 100 also includes a pair of temperature control modules 104. The pair of temperature control modules 104 at least function as a thermal management system (BMS) for the battery pack 100, including a first temperature control module 1041 and a second temperature control module 1042 that are independent of each other.

[0047] The thermal management system (BMS) is at least partially housed within the enclosure space formed by the housing 101. Its function is to receive temperature information collected by the temperature sensor 103, thereby enabling real-time monitoring of the temperature distribution of the battery pack. When an undesirable temperature condition occurs, the BMS can also adjust the cooling or heating system to balance the temperature among the batteries 102. Furthermore, the BMS can provide users with fault warnings and self-protection mechanisms, allowing users to intervene in the battery pack 100 in a timely manner or automatically prevent further escalation of battery pack 100 faults, thereby reducing the safety risks of the battery pack 100.

[0048] In this utility model, the term "mutually independent" means that the first temperature control module 1041 and the second temperature control module 1042 can receive and output signals independently of each other. At the same time, when either the first temperature control module 1041 or the second temperature control module 1042 is subjected to impact, detachment, or even damage, the operation of the other is not affected.

[0049] Continue to refer to Figure 4 The first temperature control module 1041 is disposed on the first circuit board 1061. The second temperature control module 1042 is disposed on the second circuit board 1062. Preferably, the first circuit board 1061 is a main control board, that is, the first circuit board 1061 is a main control board or BMS board that realizes the thermal management of the battery pack 100. The second circuit board 1062 is a temperature control board that only includes temperature sensing function.

[0050] The first temperature control module 1041 and the second temperature control module 1042 are arranged at intervals along the width direction. Preferably, the distance between the first temperature control module 1041 and the second temperature control module 1042 in the width direction is d3, in mm. The dimension of the battery pack 100 in the width direction is w2, in mm. 0.44≤d3 / w2≤0.61.

[0051] Optionally, the value of d3 / w2 can be: 0.44, 0.46, 0.48, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42, 0.44, 0.46, 0.48, 0.50, 0.52, 0.54, 0.56, 0.58, or 0.6. The ratio of d3 / w2 should not be too large or too small. When the ratio of d3 / w2 is too large, that is, when the distance between the first temperature control module 1041 and the second temperature control module 1042 in the width direction is close to or even exceeds the width w2 of the battery pack 100, the distance between the first temperature control module 1041 and the second temperature control module 1042 in the width direction is too large, which causes an unnecessary increase in cable length, which is not conducive to the assembly of the battery pack 100. When the ratio of d3 / w2 is too small, that is, when the distance between the first temperature control module 1041 and the second temperature control module 1042 in the width direction is too close, when the battery pack 100 is subjected to impacts, the first temperature control module 1041 and the second temperature control module 1042 that are too close together may fall off or even be damaged at the same time. This is not conducive to achieving the purpose of this utility model to ensure thermal safety.

[0052] It is understood that, based on the above range of d3 / w2, the dimensions of the battery pack 100 along the width direction can satisfy: 520mm≤w2≤580mm, and / or, the distance d3 between the first temperature control module 1041 and the second temperature control module 1042 in the width direction can satisfy: 250mm≤d3≤320mm.

[0053] Optionally, the value of w2 can be 520mm, 522mm, 524mm, 525mm, 527mm, 529mm, 530mm, 532mm, 534mm, 535mm, 537mm, 539mm, 540mm, 542mm, 544mm, 545mm, 547mm, 549mm, 550mm, 552mm, 554mm, 555mm, or 557mm or 559mm, 560mm, 562mm, 564mm, 565mm, 567mm, 569mm, 570mm, 572mm, 574mm, 575mm, 577mm, 579mm, or 580mm.

[0054] Optionally, the value of d3 can be 250mm, 252mm, 254mm, 255mm, 257mm, 259mm, 260mm, 262mm, 264mm, 265mm, 267mm, 269mm, 270mm, 272mm, 274mm, 275mm, 277mm, 279mm, 280mm, 282mm, 284mm, 285mm, 287mm, 289mm, 290mm, 292mm, 294mm, 295mm, 297mm, 299mm, 300mm, 302mm, 304mm, 305mm, 307mm, 309mm, 310mm, 312mm, 314mm, 315mm, 317mm, 319mm, or 320mm.

[0055] When the battery pack 100 includes multiple battery groups along its width, the temperature control module 104 can be set according to the number of battery groups. (Reference) Figure 8 By way of example only, when the battery pack 100 includes three battery groups 200 (hereinafter referred to as the first battery group 200) and two battery groups 300 (hereinafter referred to as the second battery group 300) arranged far apart in the width direction, a pair of independent temperature control modules 204 and a pair of independent temperature control modules 304 can be provided. Temperature control module 204 includes a third temperature control module 2041 and a fourth temperature control module 2042. Temperature control module 304 includes a fifth temperature control module 3041 and a sixth temperature control module 3042. Multiple first temperature sensors 1031 corresponding to the batteries in the first battery group 200 are electrically connected to the third temperature control module 2041. Multiple second temperature sensors 1032 corresponding to the batteries in the first battery group 200 are electrically connected to the fourth temperature control module 2042. Multiple first temperature sensors 1031 corresponding to the batteries in the second battery group 300 are electrically connected to the fifth temperature control module 3041. Multiple second temperature sensors 1032 corresponding to the batteries in the second battery pack 300 are electrically connected to the sixth temperature control module 3042. At this time, at least one of the third temperature control module 2041, the fourth temperature control module 2042, the fifth temperature control module 3041, and the sixth temperature control module 3042 functions as the thermal management system (BMS) of the battery pack 100. The preferred embodiments described above can also be similarly applied to temperature control modules 204 and 304, and will not be elaborated further here.

[0056] In another possible implementation, when the battery pack 100 includes multiple battery groups, only one pair of temperature control modules 104 may be provided. By way of example only, when the battery pack 100 includes a first battery group 200 and a second battery group 300, a plurality of first temperature sensors 1031 corresponding to the batteries in the first battery group 200 are electrically connected to the first temperature control module 1041. A plurality of second temperature sensors 1032 corresponding to the batteries in the first battery group 200 are electrically connected to the second temperature control module 1042. A plurality of first temperature sensors 1031 corresponding to the batteries in the second battery group 300 are electrically connected to the first temperature control module 1041. A plurality of second temperature sensors 1032 corresponding to the batteries in the second battery group 300 are electrically connected to the second temperature control module 1042.

[0057] return Figures 4 to 7 Each battery 102 also includes an explosion-proof valve 107. The explosion-proof valve 107 is disposed between the first terminal 400 and the second terminal 500. The battery pack 100 also includes a flexible circuit board (FPC) 108 disposed on top of the plurality of batteries 102. The first temperature control module 1041 and the second temperature control module 1042 are electrically connected to the first temperature sensor 1031 and the second temperature sensor 1032 respectively via two transmission lines arranged in the same flexible circuit board 108, and the two transmission lines are independent of each other.

[0058] Continue to refer to Figures 4 to 7 The flexible circuit board 108 includes a first portion 1081 and a second portion 1082 arranged at intervals along the width direction. Preferably, two transmission lines are respectively arranged in the first portion 1081 and the second portion 1082. Preferably, in a projection plane perpendicular to the height direction, the orthographic projections of the first portion 1081 and the second portion 1082 are located on both sides of the explosion-proof valve 107 along the width direction, and the orthographic projections of the first portion 1081 and the second portion 1082 do not completely cover the orthographic projection of the explosion-proof valve 107.

[0059] When battery 102 is operating, it dissipates and accumulates heat, causing a tendency for thermal expansion within battery 102. Explosion-proof valve 107 is typically designed to automatically release pressure when the internal pressure or temperature of battery 102 meets certain conditions. The first part 1081 and the second part 1082, thus configured, allow explosion-proof valve 107 to be easily opened. Furthermore, the first part 1081 and the second part 1082, respectively located on both sides of explosion-proof valve 107, reduce the potential impact of displacement of explosion-proof valve 107 after opening on FPC 108, the transmission routes arranged on FPC 108, and other temperature sensors 103, ensuring that at least one of the first temperature sensor 1031 and the second temperature sensor 1032 can continue to operate briefly while battery pack 100 is replaced.

[0060] The flexible circuit board 108 also includes a single connector 109 disposed on one side of the flexible circuit board 108 along its thickness direction. The first temperature control module 1041 and the second temperature control module 1042 are connected to their respective transmission lines via the connector 109. Two cables extend from the connector 109. These two cables are respectively connected to the first temperature control module 1041 and the second temperature control module 1042. Optionally, more than two cables may extend from the connector 109. When multiple battery packs or multiple pairs of temperature control modules 104 exist, two or more cables are used to connect the transmission lines to the corresponding temperature control modules 104 according to actual needs.

[0061] refer to Figure 9 This utility model also discloses an electrical device 1000, including a battery pack 100 as described above. The electrical device 1000 can be a device such as a car or communication equipment that requires the battery pack 100 to be fixedly connected to the device and moved with it, or it can be a device such as a ship that allows the battery pack 100 to be moved and transported during use. As a preferred embodiment, the battery pack 100 provided by this utility model has a small size and light weight, making it particularly suitable for supplying power to ships.

[0062] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0063] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0064] It should be understood that although terms such as "first" or "second" may be used in this invention to describe various elements (such as a first temperature sensor and a second temperature sensor), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0065] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0066] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A battery pack (100), characterized in that, include: The box (101) has an internal storage space; A battery pack includes a plurality of batteries (102) arranged in the receiving space along its thickness direction; Multiple pairs of temperature sensors (103) correspond to the multiple batteries (102) respectively. Each pair of temperature sensors (103) includes a first temperature sensor (1031) and a second temperature sensor (1032). The first temperature sensor (1031) and the second temperature sensor (1032) are used to directly or indirectly sense the temperature of the same corresponding battery (102); and A pair of temperature control modules (104) include a first temperature control module (1041) and a second temperature control module (1042) that are independent of each other. The first temperature control module (1041) and the second temperature control module (1042) are electrically connected to the first temperature sensor (1031) and the second temperature sensor (1032), respectively.

2. The battery pack (100) according to claim 1, characterized in that, The first temperature control module (1041) and the second temperature control module (1042) are respectively mounted on two circuit boards (1061, 1062).

3. The battery pack (100) according to claim 2, characterized in that, One of the two circuit boards (1061, 1062) is a BMS board, and the other is an independent temperature control board.

4. The battery pack (100) according to claim 1, characterized in that, It also includes a conductive bus (105), which includes a connection portion (105a) electrically connected to the battery (102). The first temperature sensor (1031) and the second temperature sensor (1032) are both disposed on the connection portion (105a). On a projection plane perpendicular to the height direction of the battery (102), the orthographic projection of the battery (102) covers the orthographic projection of the connection portion (105a).

5. The battery pack (100) according to claim 4, characterized in that, The thickness of the battery (102) is t1 in mm, and the distance between the first temperature sensor (1031) and the second temperature sensor (1032) in the thickness direction is d1 in mm, where 0.13 ≤ d1 / t1 ≤ 0.

6.

6. The battery pack (100) according to claim 5, characterized in that, 50mm≤t1≤80mm, and / or, 10mm≤d1≤30mm.

7. The battery pack (100) according to claim 1, characterized in that, Each battery (102) includes a first terminal (400) and a second terminal (500) with opposite polarities. The battery pack (100) also includes a first conductive bus (1051) and a second conductive bus (1052). A first connection portion (1051a) of the first conductive bus (1051) is electrically connected to the first terminal (400), and a third connection portion (1052a) of the second conductive bus (1052) is electrically connected to the second terminal (500). A pair of temperature sensors (103) are provided on the third connection portion (1052a).

8. The battery pack (100) according to claim 1, characterized in that, Each battery (102) includes a first terminal (400) and a second terminal (500) with opposite polarities. The battery pack (100) also includes a first conductive bus (1051) and a second conductive bus (1052). The first connecting portion (1051a) of the first conductive bus (1051) is electrically connected to the first terminal (400), and the third connecting portion (1052a) of the second conductive bus (1052) is electrically connected to the second terminal (500). The first temperature sensor (1031) and the second temperature sensor (1032) corresponding to the battery (102) are respectively disposed on the first connecting portion (1051a) and the third connecting portion (1052a).

9. The battery pack (100) according to claim 8, characterized in that, The width of the battery (102) is w1 in mm, and the distance between the first temperature sensor (1031) and the second temperature sensor (1032) in the width direction of the battery (102) is d2 in mm, where 0.25 ≤ d2 / w1 ≤ 0.

4.

10. The battery pack (100) according to claim 9, characterized in that, 160mm≤w1≤180mm, and / or, 45mm≤d2≤65mm.

11. The battery pack (100) according to claim 1, characterized in that, It includes multiple battery packs and multiple pairs of temperature control modules corresponding to each battery pack, and is electrically connected to the multiple pairs of temperature sensors (103) corresponding to each battery pack and the temperature control module corresponding to each battery pack.

12. The battery pack (100) according to claim 1, characterized in that, It also includes multiple battery packs, multiple pairs of temperature sensors (103) corresponding to each battery pack and electrically connected to the same pair of temperature control modules (104).

13. The battery pack (100) according to claim 1, characterized in that, The first temperature control module (1041) is electrically connected to the first temperature sensor (1031) through a first transmission line laid in the flexible circuit board (108), and the second temperature control module (1042) is electrically connected to the second temperature sensor (1032) through a second transmission line laid in the flexible circuit board (108). The first transmission line is independent of the second transmission line.

14. The battery pack (100) according to claim 13, characterized in that, The flexible circuit board (108) includes a first part (1081) and a second part (1082) arranged at intervals along the width direction of the battery (102), and the two transmission lines are respectively arranged in the first part (1081) and the second part (1082).

15. The battery pack (100) according to claim 14, characterized in that, In the width direction of the battery (102), the battery pack (100) includes a first terminal post (400), an explosion-proof valve (107), and a second terminal post (500) arranged sequentially at intervals. In the projection plane perpendicular to the height direction of the battery (102), the orthographic projections of the first part (1081) and the second part (1082) are respectively located on both sides of the explosion-proof valve (107) along the width direction, and the orthographic projections of the first part (1081) and the second part (1082) do not completely cover the orthographic projection of the explosion-proof valve (107).

16. The battery pack (100) according to claim 13, characterized in that, The flexible circuit board (108) includes a connector (109), through which the first temperature control module (1041) and the second temperature control module (1042) are connected to the corresponding transmission lines.

17. The battery pack (100) according to claim 16, characterized in that, The connector (109) includes at least two cables, which are respectively connected to the first temperature control module (1041) and the second temperature control module (1042).

18. The battery pack (100) according to claim 1, characterized in that, The first temperature control module (1041) and the second temperature control module (1042) are arranged at intervals along the width direction of the battery (102).

19. The battery pack (100) according to claim 18, characterized in that, The distance between the first temperature control module (1041) and the second temperature control module (1042) in the width direction of the battery (102) is d3, in mm, and the dimension of the battery pack (100) along the width direction is w2, in mm, 0.44≤d3 / w2≤0.61, and / or, 520mm≤w2≤580mm, and / or, 250mm≤d3≤320mm.

20. An electrical appliance (1000), characterized in that, Includes the battery pack (100) according to any one of claims 1 to 19.

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