CN212517301U

CN212517301U - Battery protection plate, battery and electronic equipment

Info

Publication number: CN212517301U
Application number: CN202021307074.7U
Authority: CN
Inventors: 袁聪俐; 姜登
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-09
Anticipated expiration: 2030-07-06

Abstract

The present disclosure relates to a battery protection plate, a battery, and an electronic apparatus. The battery protection plate includes: a substrate layer; the temperature detection element is arranged on the substrate layer, and the temperature of the temperature detection element is used for representing the temperature of the battery cell connected with the battery protection board; the heat source element is arranged on the substrate layer and is separated from the temperature detecting element; the protective layer is formed on the substrate layer and covers the heat source element, and comprises a notch; in the thickness direction of the battery protection plate, the projection of the notch in the thickness direction is located between the projection of the temperature detecting element in the thickness direction and the projection of the heat source element in the thickness direction, so that heat from the heat source element can be blocked.

Description

Battery protection plate, battery and electronic equipment

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a battery protection board, a battery, and an electronic device.

Background

In order to improve the cruising ability of the electronic device, the capacity of the battery configured in the electronic device is also increasing. The heat generated by the battery during the use of the electronic device increases the surface temperature of the electronic device, especially during the charging process, the game process or the video playing process.

Therefore, in order to improve the safety of the uniformity of the battery, the temperature of the battery needs to be detected, so as to adjust the power utilization strategy according to the temperature rise condition of the battery, and improve the safety performance of the electronic equipment. Therefore, how to accurately acquire the temperature condition of the battery has been the focus of research and development by designers.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a battery protection plate, a battery and an electronic apparatus to solve the disadvantages of the related art.

According to a first aspect of the embodiments of the present disclosure, there is provided a battery protection plate including:

a substrate layer;

the temperature detection element is arranged on the substrate layer, and the temperature of the temperature detection element is used for representing the temperature of the battery cell connected with the battery protection board;

the heat source element is arranged on the substrate layer and is separated from the temperature detecting element;

the protective layer is formed on the substrate layer and covers the heat source element, and comprises a notch;

in the thickness direction of the battery protection plate, the projection of the notch in the thickness direction is located between the projection of the temperature detecting element in the thickness direction and the projection of the heat source element in the thickness direction, so that heat from the heat source element can be blocked.

Optionally, the battery protection plate further includes a first phase change layer, the first phase change layer is filled in the gap, and the first phase change layer is used for absorbing heat.

Optionally, the protective layer includes an avoidance port extending through the protective layer toward the temperature sensing element.

Optionally, in the width direction of the battery protection board, the width dimension of the avoiding opening is smaller than or equal to the width dimension of the protection layer.

Optionally, the battery protection board further includes a second phase change layer, the second phase change layer is filled in the avoiding opening, and the second phase change layer is used for absorbing heat.

Optionally, the heat source element and the temperature detecting element are sequentially arranged along the length direction of the substrate layer, and the temperature detecting element is located at the end of the substrate layer.

Optionally, the temperature detecting element and the heat source element are located on the same side or different sides of the substrate layer.

Optionally, the heat source element comprises a field effect transistor and/or a resistor;

the temperature detecting element comprises a thermistor.

According to a second aspect of embodiments of the present disclosure, there is provided a battery including:

an electric core;

the battery protection plate according to any one of the above embodiments, wherein the battery protection plate is electrically connected to the battery cell.

According to a third aspect of embodiments of the present disclosure, there is provided an electronic device including a battery as in any one of the embodiments described above.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the notch is formed in the protective layer in the disclosure, so that heat conducted from the heat source element to the temperature detecting element is blocked through the notch, the influence of the heat source element on the temperature rise of the temperature detecting element can be reduced, the temperature rise condition of the temperature detecting element is closer to the temperature rise condition of the battery core, and the implementation of an accurate charging strategy and an accurate discharging strategy is facilitated.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic view illustrating a structure of a battery protection plate according to an exemplary embodiment.

Fig. 2 is a temperature difference curve diagram of the temperature detecting element and the battery cell in fig. 1.

Fig. 3 is a schematic structural view illustrating another battery protection plate according to an exemplary embodiment.

Fig. 4 is a schematic structural view illustrating still another battery protection plate according to an exemplary embodiment.

Fig. 5 is a schematic structural view illustrating still another battery protection plate according to an exemplary embodiment.

Fig. 6 is a schematic view illustrating a structure of still another battery protection plate according to an exemplary embodiment.

Fig. 7 is a schematic diagram illustrating a structure of a battery according to an exemplary embodiment.

FIG. 8 is an exploded schematic diagram illustrating an electronic device in accordance with an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 is a schematic view illustrating a structure of a battery protection plate 100 according to an exemplary embodiment. As shown in fig. 1, the battery protection sheet 100 may include a substrate layer 1, a temperature sensing element 2, a heat source element 3, and a protection layer 4. Wherein, substrate layer 1 can include nickel material layer or copper material layer, and this disclosure does not limit to this, and temperature of temperature detecting element 2 can be used for the temperature of the representation and this battery protection shield 100 electric core to this temperature rise of electric core can be located to this, in order to adjust the charge strategy and the discharge strategy of electric core according to the temperature rise condition, the adjustment temperature rise condition. The heat source element 3 may include one or more electronic elements on the battery protection board 100 except the temperature detecting element 2, the heat source element 3 and the temperature detecting element 2 are both formed on the substrate layer 1 and are separated from each other in position on the substrate layer 1, and the connection between the related heat source elements 3 may be used for performing protection operations such as short circuit protection, overcharge protection, overdischarge protection and the like on the battery cells of the battery protection board 100.

The protective layer 4 is also formed on the substrate layer 1, and the protective layer 4 can cover the heat source element 3 to protect the heat source element 3, and the protective layer 4 can include a notch 41, in the thickness direction of the battery protection board 100, the thickness direction projection of the notch 41 is located between the thickness direction projection of the temperature detecting element 2 and the thickness direction projection of the heat source element 3, so that the heat conducted from the heat source element 3 to the temperature detecting element 2 can be blocked through the notch 41, the temperature rise influence of the temperature rise of the heat source element 3 on the temperature detecting element 2 can be reduced, the temperature rise condition of the temperature detecting element 2 is closer to the temperature rise condition of the battery core, and the implementation of an accurate charging strategy and a discharging strategy is facilitated.

When the temperature rise condition of the temperature detecting element 2 approaches to the temperature rise condition of the battery core, the temperature difference between the temperature detecting element 2 and the battery core is smaller and smaller. As shown in fig. 2, S1 represents the temperature difference between the temperature sensing element 2 and the battery cell when the notch 41 is not provided, and S2 represents the temperature increase between the temperature sensing element 2 and the battery cell when the notch 41 is provided. Compare curve S1 and curve S2 in fig. 2, after setting up breach 41 on protective layer 4, can effectively reduce the difference in temperature between temperature detecting element 2 and the electricity core, compare in the condition that does not set up breach 41 on protective layer 4, the difference in temperature between temperature detecting element 2 and the electricity core after setting up breach 41 can reduce 1-2degC, and the difference in temperature between temperature detecting element 2 and the electricity core can be controlled within 5degC all the time. Wherein. The protective layer 4 may include a plastic injection layer formed on the substrate layer 1 by injection molding, the temperature detecting element 2 may include a thermistor element, for example, a negative temperature coefficient thermistor element or a positive temperature coefficient thermistor element, and the heat source element 3 may include one or more of a field effect transistor and a resistor, and the disclosure is not limited thereto.

Further, as shown in fig. 3, the battery protection board 100 may further include a first phase change layer 5, and the first phase change layer 5 is filled in the gap 41, so that heat from the heat source element 3 may be absorbed by a phase change of the first phase change layer 5, to further reduce a temperature rise effect of the heat source element 3 on the temperature sensing element 2, and at the same time, by filling the first phase change layer 5, a strength effect due to the gap 41 may be weakened,

in a further embodiment, as shown in fig. 4, the protection layer 4 may further include an avoidance hole 42, and the avoidance hole 42 may extend toward the temperature detecting element 2 and penetrate through the protection layer 42, so that heat from the heat source element 3 can be further blocked by the avoidance hole 42. In this embodiment, as shown in fig. 4, the width dimension of the escape opening 42 may be smaller than the width dimension of the protective layer 4 in the width direction of the battery protection plate 100. Alternatively, as shown in fig. 5, the width dimension of the escape opening 42 may be equal to the width dimension of the protective layer 4, and in this case, the length of the protective layer 4 may be set to be smaller than the length of the substrate layer 1, so that the area not covered by the protective layer 4 can be avoided from the escape opening 42.

In the above embodiments, the heat source element 3 and the temperature detecting element 2 are sequentially provided in the longitudinal direction of the base material layer 1, and the temperature detecting element 2 is located at the end of the base material layer 1. In fact, in other embodiments, the temperature detecting element 2 may also be located between a plurality of heat source elements 3, and the heat can be blocked by adjusting the number and the positions of the notches 41 and the avoiding holes 42 on the protective layer 4, which can be referred to the foregoing embodiments specifically, and the disclosure is not limited thereto.

As shown in fig. 6, the battery protection board 100 may further include a second phase change layer 6, and the second phase change layer 6 may be filled in the avoidance port 42, so that heat from the heat source element 3 may be absorbed by phase change of the second phase change layer 6, thereby further reducing the temperature rise effect of the heat from the heat source element 3 on the temperature detecting element 2, and reducing the strength effect on the battery protection board 100 due to the formation of the avoidance port 42. In the above embodiment, the temperature sensing element 2 and the heat source element 3 are located on different sides of the substrate layer 1 to optimize the element arrangement of the battery protection sheet 100 and reduce heat conduction. Indeed, in other embodiments. The temperature detecting element 2 and the heat source element 3 are located on the same side of the substrate layer 1, which is not limited by the present disclosure. Of course, the battery 200 may further include an encapsulation layer, for example, an aluminum plastic film encapsulation layer may be exposed, in addition to the battery core 201 and the battery protection plate 100. The battery cell 201 may be a laminated battery cell or a wound battery cell, and the disclosure is not limited thereto.

Based on the battery protection board 100 disclosed in the present disclosure, as shown in fig. 7, a battery 200 is also provided in the present disclosure, the battery 200 may include a battery cell 201 and the battery protection board 100 described in any of the above embodiments, and the battery protection board 100 may be electrically connected to the battery cell 201 to perform charge protection and discharge protection on the battery cell 201 through the battery protection board 100. And can characterize the temperature rise condition of electric core 201 through temperature detecting element 2 on the battery protection board 100, can adjust the strategy of charging and the strategy of discharging according to the temperature rise condition, through set up breach 41 on the protective layer 4 at battery protection board 100, can reduce the difference in temperature between temperature detecting element 2 and electric core 201 for the temperature of temperature detecting element 2 more approaches the temperature of electric core 201, thereby is favorable to adjusting the strategy of charging and the strategy of discharging accurately.

As shown in fig. 8, the present disclosure also provides an electronic device 300, and the electronic device 300 may include the battery shown in fig. 7, and the battery may be connected to a main board of the electronic device 300. Can make the temperature of temperature detecting element 2 more approach the temperature of electric core 201 through improving battery protection board 100, can avoid prestoring temperature difference curve between temperature detecting element 2 and electric core 201 in mainboard 100, improve adaptability and the flexibility to the actual charge-discharge condition. The electronic device 300 may include a battery compartment 301 and an adhesive layer 302, and the battery 200 may be adhered to the bottom of the battery compartment 301 through the adhesive layer 302, so that the battery 200 is electrically connected to a corresponding contact on the electronic device 300, and the electronic device 300 is powered.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery protection plate, comprising:

a substrate layer;

2. The battery protection plate according to claim 1, further comprising a first phase change layer filled in the gap, the first phase change layer for absorbing heat.

3. The battery protection plate as claimed in claim 1, wherein the protection layer includes an escape opening extending toward the temperature sensing element to penetrate the protection layer.

4. The battery protection plate as claimed in claim 3, wherein a width dimension of the escape opening is less than or equal to a width dimension of the protection layer in a width direction of the battery protection plate.

5. The battery protection plate according to claim 3, further comprising a second phase change layer filled in the relief opening, the second phase change layer being configured to absorb heat.

6. The battery protection panel according to claim 1, wherein the heat source element and the temperature sensing element are sequentially disposed along a length direction of the substrate layer, and the temperature sensing element is located at an end of the substrate layer.

7. The battery protection panel according to claim 1, wherein the temperature sensing element and the heat source element are located at the same side or different sides of the substrate layer.

8. The battery protection panel as claimed in claim 1, wherein the heat source element includes a field effect transistor and/or a resistor;

the temperature detecting element comprises a thermistor.

9. A battery, comprising:

an electric core;

the battery protection sheet of any one of claims 1-8, in electrical connection with the cells.

10. An electronic device comprising the battery of claim 9.