Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and the battery pack comprises a plurality of battery cells which are electrically connected through connecting sheets; and the optical fiber is provided with a temperature measuring part, and the temperature measuring part is used for detecting the temperature of the connecting sheet. According to the battery pack provided by the embodiment of the utility model, the temperature measuring part is arranged on the optical fiber, and the temperature measuring part can accurately monitor the temperature of the connecting piece in the battery pack, so that the possibility of safety accidents such as short circuit arc discharge and fire outbreak caused by local temperature rise of the battery pack is effectively reduced, and the use safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery pack and electrical equipment. Background Art

[0002] In existing battery packs, there is usually no temperature sampling at the electrical connection position, or only a very small number of electrical connections are sampled with NTC temperature sampling and monitored through the BMS system. Since there is no temperature sampling in the existing battery pack or NTC temperature sampling is performed on a very small number of electrical connections, the BMS system cannot monitor the situation in the battery pack in a timely manner. When problems such as reverse installation of copper and aluminum rows, loose / skewed screws, and cold solder joints occur in the battery pack, the electrical connections are prone to failure, and the battery pack body becomes locally hot, resulting in safety accidents such as short circuit arcing and fire. Therefore, the battery pack has the defect of poor safety in use. Utility Model Content

[0003] The utility model provides a new technical solution for a battery pack, which can at least solve the problem of poor safety in use of the battery pack in the prior art.

[0004] In a first aspect, the utility model provides a battery pack, comprising: a plurality of battery cells, wherein the plurality of battery cells are electrically connected via a connecting piece; an optical fiber, wherein the optical fiber is provided with a temperature measuring portion, wherein the temperature measuring portion is used to detect the temperature of the connecting piece.

[0005] Optionally, the optical fiber is connected to the connecting sheet via a thermally conductive adhesive layer.

[0006] Optionally, the battery pack further comprises: a shell, wherein a accommodating space is defined in the shell, the battery cell is arranged in the accommodating space, and the optical fiber is arranged in the shell.

[0007] Optionally, the shell includes: a tray; an upper cover, the upper cover and the tray are arranged to form the accommodating space; a battery holder, the battery holder is arranged on the tray or the upper cover, the connecting piece is connected to the battery holder, and the optical fiber is arranged on the battery holder.

[0008] Optionally, the plurality of battery cells are arranged in the accommodating space along a first direction, each of the battery cells is provided with electrical lead-out terminals at both ends in a second direction, the connecting piece is connected to the electrical lead-out terminals, and the plurality of connecting pieces are arranged in the battery holder along the first direction.

[0009] Optionally, the tray or the upper cover comprises: a first connecting plate, the first connecting plate extends along the first direction and is opposite to the connecting piece in the second direction, and the optical fiber is disposed on the first connecting plate.

[0010] Optionally, a mounting groove is provided on a side of the first connecting plate facing the battery core, and the optical fiber is arranged in the mounting groove.

[0011] Optionally, the battery bracket is provided with a plurality of staggered baffles, each of the ends of the baffles is provided with a buckle, and the optical fiber is buckled to the plurality of buckles.

[0012] Optionally, the maximum distance between the temperature measuring part and the connecting piece is 3 mm.

[0013] Optionally, the temperature measuring portion is formed as a grating inscribed on the light.

[0014] In a second aspect, the utility model provides an electrical device, comprising a battery pack as described in any one of the above embodiments.

[0015] According to the battery pack of the present invention, by arranging a temperature measuring part on the optical fiber, the temperature measuring part can accurately monitor the temperature of the connecting piece in the battery pack, effectively reducing the possibility of safety accidents such as short circuit arcing and fire in the battery pack due to local temperature increase, thereby improving the safety of the battery pack.

[0016] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;

[0020] Figure 3 yes Figure 1 A partial enlarged view of area B in the middle.

[0021] Reference numerals

[0022] Battery pack 100;

[0023] Shell 10; tray 12; battery holder 13; baffle 131; buckle 132; first connecting plate 14; end cover 15;

[0024] Battery cell 20;

[0025] Connecting piece 30;

[0026] Optical fiber 40;

[0027] Distribution box 50; DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] The following first describes in detail the battery pack 100 according to the embodiment of the utility model with reference to the drawings.

[0034] like Figures 1 to 3 As shown, the battery pack 100 according to the embodiment of the present invention includes: a plurality of battery cells 20 and an optical fiber 40 .

[0035] Specifically, the plurality of battery cells 20 are electrically connected via the connecting piece 30 , and the optical fiber 40 is provided with a temperature measuring portion, which is used to detect the temperature of the connecting piece 30 .

[0036] In other words, the battery pack 100 according to the embodiment of the utility model is mainly composed of a plurality of battery cells 20 and optical fibers 40, wherein the structure and arrangement of the battery cells 20 can be reasonably adjusted according to the specific usage scenario of the battery pack 100. For example, connecting plates 30 are respectively provided at both ends of the battery cells 20, and the plurality of connecting plates 30 can be connected to the plurality of battery cells 20 in sequence according to the arrangement of the battery cells 20.

[0037] The optical fiber 40 can be installed at a position corresponding to the connecting piece 30, for example, close to the connecting piece 30 or directly set on the connecting piece 30. A temperature measuring part is also provided on the optical fiber 40. The position of the temperature measuring part can correspond to the position of the connecting piece 30, so as to detect the temperature at the connecting piece 30. Since the optical fiber 40 has the advantages of low cost, small size, insulation, and anti-electromagnetic interference, a temperature measuring part 40 corresponding to the number and position of the connecting pieces 30 can be set on the optical fiber 40, so that the temperature of all the connecting pieces 30 in the battery pack 100 is monitored, thereby realizing the monitoring of all electrical connections in the battery pack 100, while effectively reducing the cost of the battery pack 100, and effectively improving the monitoring accuracy.

[0038] By aligning the temperature measuring part with the position of the connecting piece 30, the temperature measuring part can accurately monitor the temperature of the connecting piece 30. The temperature measured by the temperature measuring part can be used to determine whether there is any abnormality such as a cold weld or loose / skewed screws at the connecting piece 30. When the temperature inside the battery pack 100 rises, the temperature measuring part can display it in time, and the staff can promptly inspect and adjust the place where the temperature rises, effectively reducing the possibility of safety accidents such as short circuit, arcing, and fire in the battery pack 100.

[0039] Therefore, by setting a temperature measuring part on the optical fiber 40, the temperature measuring part can accurately monitor the temperature at the connecting piece 30 in the battery pack 100, effectively reducing the possibility of safety accidents such as short circuit arcing and fire due to local temperature increase in the battery pack 100, thereby improving the safety of the battery pack 100.

[0040] According to some embodiments of the present invention, the optical fiber 40 is connected to the connecting sheet 30 via a thermally conductive adhesive layer.

[0041] That is to say, in this embodiment, the optical fiber 40 is directly connected to the connecting plate 30, and a thermal conductive adhesive layer is provided between the optical fiber 40 and the connecting plate 30. The thermal conductive adhesive layer can directly transfer the heat between the optical fiber 40 and the connecting plate 30 on the basis of connecting the optical fiber 40 and the connecting plate 30, thereby reducing heat loss and making the temperature measurement more accurate.

[0042] In some specific embodiments of the present invention, the battery pack 100 further includes a shell 10 , wherein a receiving space is defined in the shell 10 , the battery cell 20 is disposed in the receiving space, and the optical fiber 40 is disposed in the shell 10 .

[0043] In other words, the battery pack 100 further includes a shell 10 structure for assembling the battery cell 20 and the optical fiber 40. The shell 10 has a storage space, and the storage space can be used to store multiple battery cells 20. The battery cell 20 is installed in the storage space, and the shell 10 can store and protect the battery cell 20. The two ends of the battery cell 20 are respectively provided with connecting pieces 30, and the multiple connecting pieces 30 can be arranged on the shell 10 in sequence according to the arrangement of the battery cells 20.

[0044] Therefore, by providing the housing 10 structure, the optical fiber 40 can be easily installed while accommodating and protecting the battery core 20 .

[0045] Optionally, according to an embodiment of the present utility model, the housing 10 includes a tray 12 , an upper cover and a battery holder 13 .

[0046] Specifically, the upper cover and the tray 12 are arranged to form a receiving space, the battery holder 13 is arranged on the tray 12 or the upper cover, the connecting piece 30 is connected to the battery holder 13 , and the optical fiber 40 is arranged on the battery holder 13 .

[0047] In other words, the housing 10 is mainly composed of three parts: a tray 12, an upper cover, and a battery holder 13. The tray 12 can constitute the overall support structure of the battery pack 100. The upper cover cooperates with the tray 12 to form a storage space for accommodating the battery cell 20. The battery holder 13 can be arranged on the tray 12 or on the upper cover. The connecting piece 30 on the battery cell 20 can be arranged on the battery holder 13 to achieve connection with multiple battery cells 20. The optical fiber 40 can also be arranged on the battery holder 13 to cooperate with the connecting piece 30 to detect the temperature of the connecting piece 30. Therefore, the housing 10 of this structure can facilitate the assembly of the connecting piece 30 and the optical fiber 40.

[0048] According to some other embodiments of the utility model, a plurality of battery cells 20 are arranged in the accommodating space along a first direction, each battery cell 20 is provided with electrical lead-out terminals at both ends in a second direction, a connecting piece 30 is connected to the electrical lead-out terminals, and a plurality of connecting pieces 30 are arranged in the battery holder 13 along the first direction.

[0049] In other words, if Figure 1 and Figure 2 As shown, multiple cells 20 can be arranged along Figure 1 The first direction in the arrangement of the battery cells 20 is arranged in the accommodation space. Figure 1 The two ends in the second direction are respectively provided with electrical lead-out terminals. The battery cell 20 can form a pole to form an electrical lead-out terminal at the end, or can form an electrical lead-out terminal through the housing 10. The electrical lead-out terminal can be a positive lead-out terminal or a negative lead-out terminal. The electrical lead-out terminals of two adjacent battery cells 20 are connected to the connecting piece 30, and a plurality of connecting pieces 30 can be arranged on the battery holder 13 along the first direction.

[0050] Therefore, by arranging the battery cells 20 regularly in the accommodating space, the connecting piece 30 can be arranged regularly on the battery holder 13, which is conducive to the temperature measuring part on the optical fiber 40 to be accurately aligned with the connecting piece 30, so that the temperature measuring part can accurately monitor the temperature of the connecting piece 30.

[0051] In some specific embodiments of the present invention, the tray 12 or the upper cover includes a first connecting plate 14 , which extends along a first direction and is opposite to the connecting piece 30 in a second direction. An optical fiber 40 is disposed on the first connecting plate 14 .

[0052] In other words, the tray 12 or the upper cover may respectively include two first connecting plates 14. For example, the tray 12 may be composed of a plate body supporting the battery cell 20 and two first connecting plates 14 extending in the direction of the upper cover, and the upper cover is a plate body structure that can cooperate with the tray 12 to define a storage space. Alternatively, the tray 12 may be a plate body supporting the battery cell 20, and the upper cover may be composed of a plate body and two first connecting plates 14 extending in the direction of the tray 12, and the upper cover and the tray 12 cooperate to define a storage space.

[0053] like Figure 1 As shown, taking the tray 12 including two first connecting plates 14 as an example, the two first connecting plates 14 are arranged opposite to each other, a battery holder 13 may be provided on the first connecting plate 14, a connecting plate 30 and an optical fiber 40 may be provided on at least one first connecting plate 14, end covers 15 may be provided at both ends of the tray 12, respectively, the two end covers 15 and the two first connecting plates 14 may be enclosed into a rectangular structure, the extension direction of the first connecting plate 14 may be the length direction of the battery pack 100, that is, the first direction may be the length direction of the battery pack 100, and the extension direction of the end cover 15 may be the width direction of the battery pack 100, that is, the second direction may be the width direction of the battery pack 100.

[0054] Among them, a distribution box 50 can be installed on the end cover 15, and the distribution box 50 is connected to the first end of each optical fiber 40. Through the connection between the optical fiber 40 and the distribution box 50, the temperature at the connecting piece 30 detected by the temperature measuring unit on the optical fiber 40 can be transmitted to the distribution box 50 and transmitted to the BMS system. When the temperature measured by the temperature measuring unit exceeds the alarm threshold set by the BMS system, the BMS system sends an alarm signal to avoid the occurrence of safety accidents, thereby improving the safety of the battery pack 100.

[0055] Therefore, the connection piece 30 is installed on the first connection plate 14 and the position of the connection piece 30 is further determined, which is conducive to the temperature measuring part corresponding to the connection piece 30 and facilitates the temperature measuring part to detect the temperature of the connection piece 30.

[0056] According to some optional embodiments of the present invention, an optical fiber 40 is respectively disposed on each first connecting plate 14 .

[0057] In other words, the optical fiber 40 is installed on the first connecting plate 14, which is conducive to the temperature measuring unit on the optical fiber 40 to monitor the temperature of the connecting piece 30 also installed on the first connecting plate 14, that is, the temperature measuring unit can accurately detect and feedback the temperature of the connecting piece 30.

[0058] According to an embodiment of the present invention, a mounting groove is provided on a side of the first connecting plate 14 facing the battery core 20 , and the optical fiber 40 is disposed in the mounting groove.

[0059] In other words, each first connecting plate 14 is provided with a mounting groove extending along the first direction, and the mounting groove can accommodate the optical fiber 40. By accommodating the optical fiber 40 in the mounting groove, the connection stability between the optical fiber 40 and the first connecting plate 14 can be improved, thereby further fixing the position of the optical fiber 40, and reducing the possibility that the position of the optical fiber 40 is offset, resulting in poor correspondence between the temperature measuring part and the connecting piece 30.

[0060] In some specific embodiments of the present invention, a plurality of staggered baffles 131 are provided on the battery support 13 , and a buckle 132 is provided at the end of each baffle 131 , and the optical fiber 40 is buckled into the buckle 132 .

[0061] Specifically, Figure 3 As shown, in the present embodiment, the optical fiber 40 can be assembled on the battery bracket 13 by means of a plurality of buckle structures 132 on the battery bracket 13. On the basis of assembling the connecting plate 30, the battery bracket 13 can also be provided with a plurality of baffles 131, and the plurality of baffles 131 can be arranged in a staggered manner relative to the assembly position of the optical fiber 40, so that after the optical fiber 40 is assembled, the optical fiber 40 can be fixed between the plurality of baffles 131, and the buckle 132 provided at the end of each baffle 131 can clamp the optical fiber 40, thereby ensuring the assembly stability of the optical fiber 40 on the battery bracket 13.

[0062] Optionally, according to an embodiment of the present invention, the maximum distance between the temperature measuring portion and the connecting piece 30 is 3 mm.

[0063] That is to say, the distance between each temperature measuring part and the corresponding connecting piece 30 does not exceed 3 mm, thereby ensuring the accuracy of temperature measurement between the temperature measuring part and the connecting piece 30.

[0064] In some specific embodiments of the present invention, the temperature measuring portion is formed as a grating inscribed on the optical fiber 40 .

[0065] In other words, the temperature measuring part can be formed as a grating inscribed on the optical fiber 40. Optionally, the grating can be a Bragg grating (FBG). Since the optical fiber 40 has the advantages of low cost, small size, insulation, and anti-electromagnetic interference, compared with ordinary temperature measuring elements, by using the grating inscribed on the optical fiber 40 as the temperature measuring part, the cost of the battery pack 100 can be greatly reduced.

[0066] Combine the following Figure 1 The working principle of the battery pack 100 according to the embodiment of the present utility model is described in detail.

[0067] like Figure 1 As shown, when the battery pack 100 according to the embodiment of the utility model is working, the temperature measuring part corresponds to the position of the connecting piece 30 and can detect the temperature of the connecting piece 30. The temperature measuring part can monitor the temperature of the connecting piece 30 in the battery pack 100, thereby monitoring the temperature of all electrical connections in the battery pack 100. Since the optical fiber 40 has the advantages of low cost, small size, insulation, and anti-electromagnetic interference, the cost of the battery pack 100 can be reduced.

[0068] Therefore, by setting a plurality of temperature measuring parts on the optical fiber 40, the temperature of the electrical connection can be monitored throughout the life cycle of the battery pack 100. The temperature measured by the temperature measuring part can be used to determine whether there is any abnormality such as a cold weld or a loose / skewed screw fastening at the connecting piece 30. When the temperature inside the battery pack 100 rises, the temperature measuring part can display it in time, and the staff can promptly inspect and adjust the place where the temperature rises, effectively reducing the occurrence of safety accidents such as short circuit arcing and fire in the battery pack 100, and effectively improving the safety of the battery pack 100.

[0069] The embodiment of the utility model further provides an electric device, which includes a battery pack 100 according to any of the above embodiments. Since the battery pack 100 according to the embodiment of the utility model has the above technical effects, the electric device according to the embodiment of the utility model also has corresponding technical effects, that is, by arranging multiple temperature measuring parts on the optical fiber 40, the temperature measuring parts can accurately monitor the temperature of multiple connecting pieces 30 in the battery pack 100, effectively reducing the possibility of safety accidents such as short circuit arcing and fire in the battery pack 100 due to local temperature increase, thereby improving the safety of the battery pack 100.

[0070] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are electrically connected via a connecting sheet; The optical fiber is provided with a temperature measuring part, and the temperature measuring part is used to detect the temperature of the connecting piece.

2. The battery pack according to claim 1, characterized in that: The optical fiber is connected to the connecting piece through a heat-conducting adhesive layer.

3. The battery pack according to claim 1, characterized in that: Also includes: A housing is defined in the housing to define a storage space, the battery core is arranged in the storage space, and the optical fiber is arranged in the housing.

4. The battery pack according to claim 3, characterized in that: The housing comprises: tray; An upper cover, wherein the upper cover and the tray are arranged to form the accommodation space; A battery holder, wherein the battery holder is arranged on the tray or the upper cover, the connecting piece is connected to the battery holder, and the optical fiber is arranged on the battery holder.

5. The battery pack according to claim 4, characterized in that: The multiple battery cells are arranged in the accommodating space along the first direction, each battery cell is provided with electrical lead-out terminals at both ends in the second direction, the connecting piece is connected to the electrical lead-out terminals, and the multiple connecting pieces are arranged in the battery holder along the first direction.

6. The battery pack according to claim 4, characterized in that: The tray or the upper cover comprises: A first connecting plate extends along a first direction and is opposite to the connecting piece in a second direction. The optical fiber is disposed on the first connecting plate.

7. The battery pack according to claim 6, characterized in that: A mounting groove is provided on one side of the first connecting plate facing the battery core, and the optical fiber is arranged in the mounting groove.

8. The battery pack according to claim 4, characterized in that: The battery support is provided with a plurality of staggered baffles, each of the ends of the baffles is provided with buckles, and the optical fibers are buckled into the plurality of buckles.

9. The battery pack according to claim 1, characterized in that: The maximum distance between the temperature measuring part and the connecting piece is 3 mm.

10. The battery pack according to claim 1, characterized in that: The temperature measuring part is formed as a grating inscribed on the optical fiber.

11. An electrical device, characterized in that: A battery pack comprising any one of claims 1-10.

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