Battery and terminal equipment
By designing independent cells and parallel output units, the problem of increasing the number of protection board layers in the battery is solved, resulting in reduced costs and improved battery reliability. It also avoids impedance imbalance and thermal stress concentration, thereby improving battery safety and durability.
Patent Information
- Application Number
- CN202520166692.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In existing battery designs, the number of protection board layers increases due to parallel cell connection, which in turn increases costs. At the same time, there are problems such as impedance imbalance and thermal stress concentration.
The system employs independently configured first and second battery cells, parallel output units, and protection modules to reduce additional electrical connections. Through the parallel design of protection chips and transistors, it provides dual protection, ensuring independent cell layout and dispersed current flow to avoid thermal stress concentration.
It effectively reduces battery costs, improves cell layout flexibility, avoids impedance imbalance and thermal stress concentration, and enhances battery reliability and safety.
Smart Images
Figure CN223858187U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of batteries, and particularly relates to a battery and a terminal device. BACKGROUND
[0002] A battery generally refers to a lithium ion battery or a lithium polymer battery used in a portable device such as a tablet computer or a mobile phone. These batteries are widely used due to their advantages such as light weight, high energy density, and fast charging speed.
[0003] In the prior art, a battery adopts parallel cells, which requires an additional cell parallel circuit to connect the positive poles of the cells together and the negative poles of the cells together. Due to the additional parallel circuit, the number of layers of the board is increased during the layout design of the protection board, thereby increasing the cost.
[0004] Therefore, there is an urgent need to design a battery with low cost. CONTENT OF THE UTILITY MODEL
[0005] In order to solve the problems of the prior art, the application provides a battery, which is provided with a first cell and a second cell arranged independently, and a first output unit and a second output unit connected in parallel, so that the cells are not connected in parallel, the number of layers of the board is reduced, and the cost is effectively reduced.
[0006] The technical effects achieved by the application are achieved through the following aspects:
[0007] In a first aspect, the application provides a battery, comprising:
[0008] a battery module comprising a first cell and a second cell arranged independently;
[0009] an output module comprising a first output unit and a second output unit connected in parallel, the first output unit being connected between the positive pole and the negative pole of the first cell, and the second output unit being connected between the positive pole and the negative pole of the second cell;
[0010] a first protection module, one end of which is connected between the positive pole of the first cell and the first output unit, and the other end of which is connected between the negative pole of the first cell and the first output unit; and
[0011] a second protection module, one end of which is connected between the positive pole of the second cell and the second output unit, and the other end of which is connected between the negative pole of the second cell and the second output unit.
[0012] In some implementations, the first protection module comprises a first protection unit and / or a second protection unit connected in series.
[0013] In some implementations, the first protection unit includes a protection chip U4, a transistor Q7, and a transistor Q8, an input end of the protection chip U4 is connected with a positive electrode end of the second battery cell, output ends of the protection chip U4 are connected with control ends of the transistor Q7 and the transistor Q8, and the transistor Q7 and the transistor Q8 are connected in parallel.
[0014] In some implementations, the second protection unit includes a protection chip U3, a transistor Q5, and a transistor Q6, an input end of the protection chip U3 is connected with a positive electrode end of the second battery cell, output ends of the protection chip U3 are connected with control ends of the transistor Q5 and the transistor Q6, and the transistor Q5 and the transistor Q6 are connected in parallel.
[0015] In some implementations, the second protection module includes a third protection unit and / or a fourth protection unit connected in series.
[0016] In some implementations, the third protection unit includes a protection chip U2, a transistor Q3, and a transistor Q4, an input end of the protection chip U2 is connected with a positive electrode end of the first battery cell, output ends of the protection chip U2 are connected with control ends of the transistor Q3 and the transistor Q4, and the transistor Q3 and the transistor Q4 are connected in parallel.
[0017] In some implementations, the fourth protection unit includes a protection chip U1, a transistor Q1, and a transistor Q2, an input end of the protection chip U1 is connected with a positive electrode end of the first battery cell, output ends of the protection chip U1 are connected with control ends of the transistor Q1 and the transistor Q2, and the transistor Q1 and the transistor Q2 are connected in parallel.
[0018] In some implementations, the battery further includes an identification module connected between the first output unit and the first protection module.
[0019] In some implementations, the identification module includes a storage chip U5 and a thermistor RT1, and the storage chip U5 and the thermistor RT1 are connected with the first output unit.
[0020] In a second aspect, the application provides a terminal device applied to a tablet computer or a mobile phone, and includes the battery as described above.
[0021] In summary, the application has at least the following advantages:
[0022] 1. The battery provided in the application, by adopting the independently arranged first and second battery cells, and the parallel arrangement of the first and second output units, since the first and second battery cells are independent of each other, there is no additional parallel electrical connection, so that the number of plate layers is reduced, thereby greatly saving the cost.
[0023] 2. The battery and terminal device provided in the application, since the first and second battery cells are independent of each other, the layout flexibility of the first and second battery cells is improved, the first and second battery cells can be placed on both sides of the output end, the impedance of the two independent batteries is consistent, and the problem of impedance imbalance is effectively avoided.
[0024] 3. The battery and terminal device provided in the application, since the first and second battery cells can be independently arranged, the precise resistors and transistors in the circuit can be dispersedly arranged, the current flows through the heating elements in two paths, that is, the case that large current flows together and then flows through the precise resistors, transistors and other heating components is avoided, the thermal stress concentration is effectively avoided, the temperature rise is effectively reduced, and the reliability of the product is increased. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a structure schematic diagram of the battery in Embodiment 1 of the application.
[0026] Figure 2 It is another structure schematic diagram of the battery in Embodiment 1 of the application.
[0027] Figure 3 It is a structure schematic diagram of the battery in Embodiment 2 of the application.
[0028] Figure 4 It is a partial structure schematic diagram of the terminal device in Embodiment 3 of the application.
[0029] Figure 5 It is a structure schematic diagram of the terminal device in Embodiment 3 of the application.
[0030] Markings in the figure:
[0031] 100, battery, 1, battery module, B1, first battery cell, B2, second battery cell; 2, output module, J1, first output unit, J2, second output unit; 3, first protection module, 31, first protection unit, 32, second protection unit; 4, second protection module, 41, third protection unit, 42, fourth protection unit; 5, identification module; 200, terminal device, 6, interface, C1, first circuit, C2, second circuit. DETAILED DESCRIPTION
[0032] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.
[0033] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work under the premise that the embodiments in the present application fall within the scope of protection of the present application.
[0034] Embodiment 1
[0035] Please refer to the drawings Figure 1 - the drawings Figure 2 , a battery of the present application includes a battery module 1, an output module 2, a first protection module 3, and a second protection module 4.
[0036] The battery module 1 includes a first battery cell B1 and a second battery cell B2 arranged independently. Through the independent arrangement of the first battery cell B1 and the second battery cell B2, the first battery cell B1 and the second battery cell B2 are not additionally electrically connected in parallel, so that the number of layout board sub-layers is reduced, thereby reducing the cost.
[0037] The output module 2 includes a first output unit J1 and a second output unit J2 connected in parallel, the first output unit J1 is connected between the positive and negative terminals of the first battery cell B1, and the second output unit J2 is connected between the positive and negative terminals of the second battery cell B2.
[0038] One end of the first protection module 3 is connected between the positive terminal of the first battery cell B1 and the first output unit J1, and the other end of the first protection module 3 is connected between the negative terminal of the first battery cell B1 and the first output unit J1.
[0039] One end of the second protection module 4 is connected between the positive terminal of the second battery cell B2 and the second output unit J2, and the other end of the second protection module 4 is connected between the negative terminal of the second battery cell B2 and the second output unit J2.
[0040] Through the above setting, the first battery cell B1 and the second battery cell B2 are charged by the first output unit J1 and the second output unit J2 in parallel; and when the battery is discharged, the first battery cell B1 and the second battery cell B2 are discharged to the first output unit J1 and the second output unit J2. The first protection module 3 is arranged between the first battery cell B1 and the first output unit J1, and the second protection module 4 is arranged between the second battery cell B2 and the second output unit J2, so that when the voltage and current are too high during charging, the circuit can be cut off, or when the voltage is too low during discharging, the circuit can be cut off, thereby effectively protecting the battery and the terminal device and improving the use safety.
[0041] In the battery 100 in the embodiment, the first battery cell B1 and the second battery cell B2 are independently arranged, so that the first battery cell B1 and the second battery cell B2 are not additionally connected in parallel, and the electrical connection mode can be arranged by using only two layers of soft boards, thereby effectively reducing the number of layers of the board and saving the cost.
[0042] In the structure, the first battery cell B1 and the second battery cell B2 are independent of each other, thereby improving the layout flexibility of the first battery cell B1 and the second battery cell B2, and the first battery cell B1 and the second battery cell B2 can be placed on the two sides of the output module 2, so that the impedances of the two independent batteries are consistent, and the problem of impedance imbalance is effectively avoided.
[0043] In addition, the first battery cell B1 and the second battery cell B2 can be independently arranged, so that the precise resistors and transistors in the circuit can be dispersedly arranged along with the first battery cell B1 and the second battery cell B2, and the current flows through the heating elements in two paths, thereby avoiding the situation that a large current flows together and then flows through the precise resistors and transistors, effectively avoiding thermal stress concentration, effectively reducing the temperature rise, and increasing the reliability of the product.
[0044] Embodiment 2:
[0045] The difference between the embodiment and the embodiment 1 is that, as shown in Figure 3 The first protection module 3 in the embodiment includes a first protection unit 31 and a second protection unit 32 connected in series.
[0046] The first protection unit 31 includes a protection chip U4, a transistor Q7, and a transistor Q8. The input end of the protection chip U4 is connected with the positive electrode end of the second battery cell B2, the output ends of the protection chip U4 are connected with the control ends of the transistor Q7 and the transistor Q8, and the transistor Q7 and the transistor Q8 are connected in parallel.
[0047] The first protection unit 31 in the embodiment has the following operation process: the protection chip U4 has a charging limit protection voltage of 4.5 V. When the first battery B1 reaches 4.5 V, the output CO pin of the protection chip U4 changes from high level to low level, the paths of the transistor Q7 and the transistor Q8 are disconnected, and the charging is stopped.
[0048] The protection chip U4 has a discharging protection voltage of 2.5 V. When the first battery B1 continues to discharge below 2.5 V, the output DO pin of the protection chip U4 changes from high level to low level, the paths of the transistor Q7 and the transistor Q8 are disconnected, and the discharging is stopped.
[0049] The protection chip U4 matches the precision resistor. If the charging / discharging limit current is 10 A at this time, the charging / discharging can be normally performed within 10 A. If the current exceeds 10 A, the output CO pin and the output DO pin of the protection chip U4 change from high level to low level, the paths of the transistor Q7 and the transistor Q8 are disconnected, and the charging / discharging is stopped. In this way, the first battery B1 can effectively protect the battery and the terminal device during use.
[0050] The second protection unit 32 includes the protection chip U3, the transistor Q5, and the transistor Q6. The input end of the protection chip U3 is connected with the positive electrode end of the second battery B2, the output ends of the protection chip U3 are connected with the control ends of the transistor Q5 and the transistor Q6, and the transistor Q5 and the transistor Q6 are connected in parallel. Specifically, the second protection unit 32 has the same operation principle as the first protection unit 31, and provides a double protection function for the first battery B1, thereby improving the performance of the protection battery.
[0051] The first protection module 3 in the embodiment provides a protection function for the first battery B1, thereby ensuring the safety of the charging and discharging of the first battery B1, prolonging the service life of the first battery B1, and improving the durability of the first battery B1.
[0052] In some embodiments, the second protection module 4 includes the third protection unit 41 and the fourth protection unit 42 connected in series.
[0053] The third protection unit 41 includes the protection chip U2, the transistor Q3, and the transistor Q4. The input end of the protection chip U2 is connected with the positive electrode end of the first battery B1, the output ends of the protection chip U2 are connected with the control ends of the transistor Q3 and the transistor Q4, and the transistor Q3 and the transistor Q4 are connected in parallel.
[0054] The third protection unit 41 in the embodiment has the following operation process: the protection chip U2 has a charging limit protection voltage of 4.5 V. When the first battery cell B1 reaches 4.5 V and continues to be charged, the output CO pin of the protection chip U2 changes from high level to low level, disconnects the paths of the transistors Q3 and Q4, and stops charging.
[0055] The protection chip U2 has a discharging protection voltage of 2.5 V. When the second battery cell B2 continues to be discharged at 2.5 V, the output DO pin of the protection chip U2 changes from high level to low level, disconnects the paths of the transistors Q3 and Q4, and stops discharging.
[0056] The protection chip U2 matches the precision resistor. If the charging / discharging limit current is 10 A at this time, the charging / discharging current can be normally charged / discharged within 10 A. If the current exceeds 10 A, the output CO pin and the output DO pin of the protection chip U2 change from high level to low level, disconnect the paths of the transistors Q3 and Q4, and stop charging / discharging. Through the above setting, the second battery cell B2 can effectively protect the battery and the terminal device during use.
[0057] The fourth protection unit 42 includes the protection chip U1, the transistor Q1, and the transistor Q2. The input end of the protection chip U1 is connected with the positive electrode end of the first battery cell B1, the output ends of the protection chip U1 are connected with the control ends of the transistor Q1 and the transistor Q2, and the transistor Q1 and the transistor Q2 are connected in parallel. Specifically, the fourth protection unit 42 has the same operation principle as the third protection unit 41, and provides a double protection function for the second battery cell B2, thereby improving the performance of the protection battery.
[0058] The second protection module 4 in the embodiment provides a protection function for the second battery cell B2, thereby ensuring the safety of the charging and discharging of the second battery cell B2, prolonging the service life of the second battery cell B2, and improving the durability of the second battery cell B2.
[0059] In some embodiments, the battery 100 further includes an identification module 5 connected between the first output unit J1 and the first protection module 3.
[0060] Specifically, the identification module 5 includes the storage chip U5 and the thermistor RT1, and the storage chip U5 and the thermistor RT1 are connected with the first output unit J1. The Vcc end of the storage chip U5 is connected with the EE end of the first output unit J1, the SCL end of the storage chip U5 is connected with the SCL end of the first output unit J1, the SDA end of the storage chip U5 is connected with the SDA end of the first output unit J1, and the Vss end of the storage chip U5 is connected with the negative electrode end of the first output unit J1. One end of the thermistor RT1 is connected with the TH1 end of the first output unit, and the other end of the thermistor RT1 is connected with the negative electrode end of the first output unit.
[0061] The storage chip U5 writes and stores battery manufacturer information, PCM information, etc., via SDA / SCL, making it easy for the terminal to identify this information. The thermistor RT1 is used to sense battery temperature. This feature allows the battery 100 to identify the corresponding battery series, thereby ensuring high battery compatibility and safe battery operation.
[0062] Example 3:
[0063] This embodiment is based on the above embodiment; please refer to [link / reference]. Figures 4-5 It provides a terminal device 200 for use in tablets or mobile phones, including the aforementioned battery 100.
[0064] In this structure, since the first cell B1 and the second cell B2 are placed in different relative positions in the battery compartment, the first circuit C1 connected to the first cell B1 and the second circuit C2 connected to the second cell B2 can be arranged on both sides of the interface, so that precision resistors and transistors can be placed between the battery cell tabs respectively, achieving a reasonable distribution of component positions, thereby ensuring impedance balance of the two independent batteries.
[0065] In addition, through the reasonable layout of components, heat-generating elements such as transistors and precision resistors are dispersed, and their current flows through both sides, which effectively reduces the temperature rise and improves the reliability of the product.
[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0067] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0068] Furthermore, terms like "horizontal," "vertical," "up," "down," "upper," "lower," and the like are used herein for the convenience of the reader in relation to the illustrations given. They do not imply absolute orientations or directions.
[0069] In this application, unless specifically stated and limited otherwise, the use of the word "comprise" or "comprises" or "comprising" means that the word "comprise" or "comprises" or "comprising" is used in the sense of "including but not limited to" and not in the sense of "consist only of" or "consisting only of."
[0070] While the application has been described in connection with specific embodiments thereof, it will be understood that many modifications, changes, alterations and substitutions are possible in the meaning and scope of the application as defined by the appended claims.
Claims
1. A battery, characterized by, The battery comprises: a battery module comprising a first and a second independently arranged cell; an output module comprising a first and a second output unit connected in parallel, the first output unit being connected between the positive and negative terminals of the first cell, and the second output unit being connected between the positive and negative terminals of the second cell; a first protection module, one end of which is connected between the positive terminal of the first cell and the first output unit, and the other end of which is connected between the negative terminal of the first cell and the first output unit; and a second protection module, one end of which is connected between the positive terminal of the second cell and the second output unit, and the other end of which is connected between the negative terminal of the second cell and the second output unit. The first protection module comprises a first and / or a second protection unit connected in series.
2. The battery of claim 1, wherein, The first protection unit comprises a protection chip U4, a transistor Q7 and a transistor Q8, the input terminal of the protection chip U4 being connected to the positive terminal of the second cell, the output terminals of the protection chip U4 being connected to the control terminals of the transistor Q7 and the transistor Q8, and the transistor Q7 and the transistor Q8 being connected in parallel.
3. The battery of claim 2, wherein, The second protection unit comprises a protection chip U3, a transistor Q5 and a transistor Q6, the input terminal of the protection chip U3 being connected to the positive terminal of the second cell, the output terminals of the protection chip U3 being connected to the control terminals of the transistor Q5 and the transistor Q6, and the transistor Q5 and the transistor Q6 being connected in parallel.
4. The battery of claim 2, wherein, The second protection module comprises a third and / or a fourth protection unit connected in series.
5. The battery of claim 3, wherein, The third protection unit comprises a protection chip U2, a transistor Q3 and a transistor Q4, the input terminal of the protection chip U2 being connected to the positive terminal of the first cell, the output terminals of the protection chip U2 being connected to the control terminals of the transistor Q3 and the transistor Q4, and the transistor Q3 and the transistor Q4 being connected in parallel.
6. The battery of claim 5, wherein, The fourth protection unit comprises a protection chip U1, a transistor Q1 and a transistor Q2, the input terminal of the protection chip U1 being connected to the positive terminal of the first cell, the output terminals of the protection chip U1 being connected to the control terminals of the transistor Q1 and the transistor Q2, and the transistor Q1 and the transistor Q2 being connected in parallel.
7. The battery of claim 5, wherein, The battery further comprises an identification module connected between the first output unit and the first protection module.
8. The battery of claim 1, wherein, The identification module comprises a storage chip U5 and a thermistor RT1, both of which are connected to the first output unit.
9. The battery of claim 8, wherein, The terminal device can be a tablet or a mobile phone, comprising the battery as claimed in any one of claims 1-9.
10. A terminal device, characterized by