Battery temperature acquisition circuit board

Abstract

The utility model discloses a battery temperature acquisition circuit board, which comprises a substrate, and a terminal bonding pad group, a first resistance bonding pad group and a second resistance bonding pad group which are arranged on the front surface of the substrate, the two first acquisition bonding pads of the first resistance bonding pad group are respectively connected with the two terminal bonding pads of the terminal bonding pad group in a one-to-one manner through first acquisition lines, and the two second acquisition bonding pads of the second resistance bonding pad group are respectively connected with the two terminal bonding pads of the terminal bonding pad group in a one-to-one manner through second acquisition lines. The distance between the second resistance bonding pad group and the terminal bonding pad group is smaller than that between the first resistance bonding pad group and the terminal bonding pad group, the second acquisition circuit is arranged in an S shape, the length of the second acquisition circuit is the same as that of the first acquisition circuit, and the width of the second acquisition circuit is the same as that of the first acquisition circuit. According to the circuit provided by the utility model, the resistance of each acquisition circuit is the same, so that more accurate circuit resistance compensation can be carried out on each thermistor by only needing one circuit compensation value.

Description

Technical Field

[0001] The utility model relates to the field of power battery monitoring, in particular to a battery temperature acquisition circuit board. Background Art

[0002] At present, an important component of vehicles with motor drive (such as hybrid vehicles, pure electric vehicles, extended-range electric vehicles, etc.) is the power battery, and the operation of the power battery is greatly affected by temperature. Therefore, existing vehicles with motor drive are equipped with temperature collectors to collect the temperature of multiple locations of the power battery.

[0003] The existing power battery temperature collector generally includes a battery temperature collection circuit board, a connection terminal set on the battery temperature collection circuit board, and multiple thermistors. The position of each thermistor corresponds to the place where the power battery needs to collect temperature. Each thermistor is connected to the connection terminal through two collection lines on the battery temperature collection circuit board. The resistance of the collection line itself will affect the resistance value detection of the thermistor. Therefore, when the resistance value of the thermistor needs to be detected, a line compensation value needs to be designed to compensate for the detection deviation caused by the resistance of the collection line. However, the resistance of each collection line connected to each thermistor of the existing power battery temperature collector is not the same or completely different, and the resistance value varies greatly. Therefore, it is necessary to design a line compensation value for each thermistor, which is very cumbersome.

[0004] In view of the above problems, it is necessary to study a battery temperature acquisition circuit board, which can make the resistance of each acquisition circuit the same, so that only one circuit compensation value is needed to more accurately compensate the circuit resistance of each thermistor. Utility Model Content

[0005] The utility model aims to provide a battery temperature acquisition circuit board, which can make the resistance of each acquisition circuit the same, so that only one circuit compensation value is needed to perform relatively accurate circuit resistance compensation on each thermistor.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A battery temperature acquisition circuit board comprises a substrate, and a terminal pad group, a first resistance pad group and a second resistance pad group arranged on the front side of the substrate; the terminal pad group comprises a plurality of terminal pads arranged side by side, the first resistance pad group comprises two first acquisition pads arranged adjacent to each other, the two first acquisition pads are connected one-to-one with the two terminal pads of the terminal pad group respectively through a first acquisition circuit, the second resistance pad group comprises two second acquisition pads arranged adjacent to each other, the two second acquisition pads are connected one-to-one with the two terminal pads of the terminal pad group respectively through a second acquisition circuit, the distance between the second resistance pad group and the terminal pad group is smaller than the distance between the first resistance pad group and the terminal pad group, the second acquisition circuit is arranged in an "S" shape, the length of the second acquisition circuit is the same as the length of the first acquisition circuit, and the width of the second acquisition circuit is the same as the width of the first acquisition circuit.

[0008] The first resistor pad group also includes a first ground pad adjacent to the first collection pad, and the first ground pad is connected one-to-one with a terminal pad of the terminal pad group through a first ground line; the second resistor pad group also includes a second ground pad adjacent to the second collection pad, and the second ground pad is connected one-to-one with a terminal pad of the terminal pad group through a second ground line.

[0009] The battery temperature acquisition circuit board also includes a third resistor pad group arranged on the front side of the substrate; the distance between the third resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the third resistor pad group includes two third acquisition pads arranged adjacent to each other, and the two third acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a third acquisition circuit; the length of the third acquisition circuit is 1.4 times the length of the first acquisition circuit, the third acquisition circuit is divided into two parts, the length of the first part of the third acquisition circuit is four-sevenths of the total length of the third acquisition circuit, the width of the first part of the third acquisition circuit is the same as the width of the first acquisition circuit, the length of the second part of the third acquisition circuit is three-sevenths of the total length of the third acquisition circuit, and the width of the second part of the third acquisition circuit is three times the width of the first acquisition circuit.

[0010] The third resistance pad group further includes a third ground pad adjacent to the third collection pad, and the third ground pad is connected one-to-one with a terminal pad of the terminal pad group through a third ground line.

[0011] The battery temperature acquisition circuit board also includes a fourth resistor pad group arranged on the front side of the substrate; the distance between the fourth resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the fourth resistor pad group includes two adjacent fourth acquisition pads, and the two fourth acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a fourth acquisition line; the length of the fourth acquisition line is 1.7 times the length of the first acquisition line, the fourth acquisition line is divided into two parts, the length of the first part of the fourth acquisition line is three-seventeenths of the total length of the fourth acquisition line, the width of the first part of the fourth acquisition line is the same as the width of the first acquisition line, the length of the second part of the fourth acquisition line is fourteen-seventeenths of the total length of the fourth acquisition line, and the width of the second part of the fourth acquisition line is three times the width of the first acquisition line.

[0012] The fourth resistance pad group further includes a fourth ground pad adjacent to the fourth collection pad, and the fourth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a fourth ground line.

[0013] The battery temperature acquisition circuit board also includes a fifth resistor pad group arranged on the front side of the substrate; the distance between the fifth resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the fifth resistor pad group includes two adjacent fifth acquisition pads, and the two fifth acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a fifth acquisition circuit; the length of the fifth acquisition circuit is two and a half times the length of the first acquisition circuit, the fifth acquisition circuit is divided into two parts, the length of the first part of the fifth acquisition circuit is one-seventh of the total length of the fifth acquisition circuit, the width of the first part of the fifth acquisition circuit is the same as the width of the first acquisition circuit, the length of the second part of the fifth acquisition circuit is six-sevenths of the total length of the fifth acquisition circuit, and the width of the second part of the fifth acquisition circuit is five times the width of the first acquisition circuit.

[0014] The fifth resistance pad group further includes a fifth ground pad adjacent to the fifth collection pad, and the fifth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a fifth ground line.

[0015] The battery temperature acquisition circuit board also includes a sixth resistor pad group arranged on the front side of the substrate; the distance between the sixth resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the sixth resistor pad group includes two adjacently arranged sixth acquisition pads, and the two sixth acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a sixth acquisition line; the length of the sixth acquisition line is 2.5 times the length of the first acquisition line, the sixth acquisition line is divided into two parts, the length of the first part of the sixth acquisition line is eight twenty-fifths of the total length of the sixth acquisition line, the width of the first part of the sixth acquisition line is the same as the width of the first acquisition line, the length of the second part of the sixth acquisition line is seventeen twenty-fifths of the total length of the sixth acquisition line, and the width of the second part of the sixth acquisition line is five times the width of the first acquisition line.

[0016] The sixth resistance pad group further includes a sixth ground pad adjacent to the sixth collection pad, and the sixth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a sixth ground line.

[0017] The substrate is a flexible structure.

[0018] After adopting the above scheme, the utility model has the following characteristics:

[0019] 1. The second acquisition line of the utility model is arranged in an "S" shape to effectively extend the length of the second acquisition line L21, so that the length of the second acquisition line is the same as that of the first acquisition line, and the width of the second acquisition line is the same as that of the first acquisition line, so that the second acquisition line and the first acquisition line can have the same loop resistance;

[0020] 2. The utility model can make the third acquisition circuit have the same loop resistance as the first acquisition circuit by widening the second part of the third acquisition circuit; can make the fourth acquisition circuit have the same loop resistance as the first acquisition circuit by widening the second part of the fourth acquisition circuit; can make the fifth acquisition circuit have the same loop resistance as the first acquisition circuit by widening the second part of the fifth acquisition circuit; can make the sixth acquisition circuit have the same loop resistance as the first acquisition circuit by widening the second part of the sixth acquisition circuit.

[0021] As can be seen from the above, the utility model can make the resistance of each acquisition circuit the same, so that only one circuit compensation value is needed to perform relatively accurate circuit resistance compensation for each thermistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Description of labels:

[0024] Substrate S,

[0025] Terminal pad group P, terminal pad P1,

[0026] The first resistance pad group R1, the first collection pad R11, the first ground pad R12,

[0027] The second resistance pad group R2, the second collection pad R21, the second ground pad R22,

[0028] The third resistance pad group R3, the third collection pad R31, the third ground pad R32,

[0029] The fourth resistance pad group R4, the fourth collection pad R41, the fourth grounding pad R42,

[0030] The fifth resistance pad group R5, the fifth collection pad R51, the fifth grounding pad R52,

[0031] The sixth resistance pad group R6, the sixth collection pad R61, the sixth ground pad R62,

[0032] The first acquisition line L11, the first grounding line L12,

[0033] The second collection line L21, the second grounding line L22,

[0034] The third acquisition line L31, the third grounding line L32,

[0035] The fourth collection line L41, the fourth grounding line L42,

[0036] The fifth collection line L51, the fifth grounding line L52,

[0037] The sixth collection line L61 and the sixth grounding line L62. DETAILED DESCRIPTION

[0038] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0039] like Figure 1As shown, the utility model discloses a battery temperature acquisition circuit board, which includes a substrate S, and a terminal pad group P, a first resistance pad group R1 and a second resistance pad group R2 arranged on the front side of the substrate S; the terminal pad group P is used to connect with the connection terminal, the terminal pad group P includes a plurality of terminal pads P1 arranged side by side, the first resistance pad group R1 is used to connect with the thermistor, the first resistance pad group R1 includes two first acquisition pads R11 arranged adjacently, the two first acquisition pads R11 are used to be welded with the two ends of the thermistor, the two first acquisition pads R11 are respectively connected one-to-one with the two terminal pads P1 of the terminal pad group P through a first acquisition line L11, the second resistance pad group R2 is also used to connect with the thermistor, and the second resistance pad group R1 is connected to the thermistor. The pad group R2 includes two second collection pads R21 arranged adjacent to each other. The two second collection pads R21 are also used for welding with the two ends of the thermistor. The two second collection pads R21 are connected one-to-one with the two terminal pads P1 of the terminal pad group P through the second collection line L21. The distance between the second resistance pad group R2 and the terminal pad group P is smaller than the distance between the first resistance pad group R1 and the terminal pad group P. The second collection line L21 is arranged in an "S" shape to effectively extend the length of the second collection line L21, so that the length of the second collection line L21 is the same as the length of the first collection line L11. The length of the first collection line L11 can be 100 mm, and the width of the second collection line L21 is the same as the width of the first collection line L11. Among them, since the length of the second collection line L21 is the same as the length of the first collection line L11, and the width of the second collection line L21 is the same as the width of the first collection line L11, the second collection line L21 and the first collection line L11 can have the same loop resistance.

[0040] In an embodiment of the utility model, the substrate S may be a flexible structure (i.e., a battery temperature acquisition circuit board of the utility model is a flexible circuit board), so that the substrate S can be bent and deformed, so that a battery temperature acquisition circuit board of the utility model can be flexibly arranged on the power battery; of course, the substrate S may also be a hard structure.

[0041] In an embodiment of the utility model, the first resistor pad group R1 may further include a first ground pad R12 adjacent to the first collection pad R11, the first ground pad R12 is connected one-to-one with a terminal pad P1 of the terminal pad group P through a first ground line L12, and the first ground pad R12 is used to be welded to the ground pin of the thermistor, so that the thermistor can be reliably grounded through the first ground pad R12 and the first ground line L12, and the resistance value of the first ground line L12 will not affect the resistance value measurement of the thermistor. Similarly, the second resistor pad group R2 may also include a second ground pad R22 adjacent to the second collection pad R21, the second ground pad R22 is connected one-to-one with a terminal pad P1 of the terminal pad group P through a second ground line L22, and the second ground pad R22 is used to be welded to the ground pin of the thermistor, so that the thermistor can be reliably grounded through the second ground pad R22 and the second ground line L22, and the resistance value of the second ground line L22 will not affect the resistance value measurement of the thermistor.

[0042] In an embodiment of the utility model, a battery temperature acquisition circuit board of the utility model may further include a third resistor pad group R3 arranged on the front side of the substrate S, and the third resistor pad group R3 is also used to connect with the thermistor so that the battery temperature acquisition circuit board of the utility model can connect more thermistors; the distance between the third resistor pad group R3 and the terminal pad group P is greater than the distance between the first resistor pad group R1 and the terminal pad group P, and the third resistor pad group R3 includes two third acquisition pads R31 arranged adjacently, and the two third acquisition pads R31 are also used to be welded with the two ends of the thermistor, and the two third acquisition pads R31 are respectively connected one-to-one with the two terminal pads P1 of the terminal pad group P through the third acquisition line L31; The length of the third acquisition line L31 is 1.4 times the length of the first acquisition line L11. The third acquisition line L31 is divided into two parts. The length of the first part of the third acquisition line L31 is four-sevenths of the total length of the third acquisition line L31. The width of the first part of the third acquisition line L31 is the same as the width of the first acquisition line L11. The length of the second part of the third acquisition line L31 is three-sevenths of the total length of the third acquisition line L31. The width of the second part of the third acquisition line L31 is three times the width of the first acquisition line L11. In this way, the utility model can make the third acquisition line L31 have the same loop resistance as the first acquisition line L11 by widening the second part of the third acquisition line L31.

[0043] In an embodiment of the utility model, the third resistance pad group R3 may further include a third grounding pad R32 adjacent to the third collection pad R31, the third grounding pad R32 is one-to-one connected to a terminal pad P1 of the terminal pad group P through a third grounding line L32, and the third grounding pad R32 is used to be welded to the grounding pin of the thermistor, so that the thermistor can be reliably grounded through the third grounding pad R32 and the third grounding line L32, and the resistance value of the third grounding line L32 will not affect the resistance value measurement of the thermistor.

[0044] In an embodiment of the utility model, a battery temperature acquisition circuit board of the utility model may further include a fourth resistor pad group R4 arranged on the front side of the substrate S, and the fourth resistor pad group R4 is also used to connect with the thermistor so that the battery temperature acquisition circuit board of the utility model can connect more thermistors; the distance between the fourth resistor pad group R4 and the terminal pad group P is greater than the distance between the first resistor pad group R1 and the terminal pad group P, and the fourth resistor pad group R4 includes two adjacently arranged fourth acquisition pads R41, and the two fourth acquisition pads R41 are also used to be welded to the two ends of the thermistor, and the two fourth acquisition pads R41 are respectively connected one-to-one with the two terminal pads P1 of the terminal pad group P through the fourth acquisition line L41; the fourth The length of the acquisition line L41 is 1.7 times the length of the first acquisition line L11. The fourth acquisition line L41 is divided into two parts. The length of the first part of the fourth acquisition line L41 is 3 / 17 of the total length of the fourth acquisition line L41. The width of the first part of the fourth acquisition line L41 is the same as the width of the first acquisition line L11. The length of the second part of the fourth acquisition line L41 is 14 / 17 of the total length of the fourth acquisition line L41. The width of the second part of the fourth acquisition line L41 is three times the width of the first acquisition line L11. In this way, the utility model can make the fourth acquisition line L41 have the same loop resistance as the first acquisition line L11 by widening the second part of the fourth acquisition line L41.

[0045] In an embodiment of the utility model, the fourth resistance pad group R4 may further include a fourth grounding pad R42 adjacent to the fourth collection pad R41, the fourth grounding pad R42 is one-to-one connected to a terminal pad P1 of the terminal pad group P through a fourth grounding line L42, and the fourth grounding pad R42 is used to be welded to the grounding pin of the thermistor, so that the thermistor can be reliably grounded through the fourth grounding pad R42 and the fourth grounding line L42, and the resistance value of the fourth grounding line L42 will not affect the resistance value measurement of the thermistor.

[0046] In an embodiment of the utility model, a battery temperature acquisition circuit board of the utility model may further include a fifth resistor pad group R5 arranged on the front side of the substrate S, and the fifth resistor pad group R5 is also used to connect with the thermistor so that the battery temperature acquisition circuit board of the utility model can connect more thermistors; the distance between the fifth resistor pad group R5 and the terminal pad group P is greater than the distance between the first resistor pad group R1 and the terminal pad group P, and the fifth resistor pad group R5 includes two fifth acquisition pads R51 arranged adjacently, and the two fifth acquisition pads R51 are also used to be welded with the two ends of the thermistor, and the two fifth acquisition pads R51 are respectively connected one-to-one with the two terminal pads P1 of the terminal pad group P through the fifth acquisition line L51; The length of the fifth acquisition line L51 is two and a half times the length of the first acquisition line L11. The fifth acquisition line L51 is divided into two parts. The length of the first part of the fifth acquisition line L51 is one seventh of the total length of the fifth acquisition line L51. The width of the first part of the fifth acquisition line L51 is the same as the width of the first acquisition line L11. The length of the second part of the fifth acquisition line L51 is six sevenths of the total length of the fifth acquisition line L51. The width of the second part of the fifth acquisition line L51 is five times the width of the first acquisition line L11. In this way, the utility model can make the fifth acquisition line L51 have the same loop resistance as the first acquisition line L11 by widening the second part of the fifth acquisition line L51.

[0047] In an embodiment of the utility model, the fifth resistance pad group R5 may further include a fifth grounding pad R52 adjacent to the fifth collection pad R51, the fifth grounding pad R52 is one-to-one connected to a terminal pad P1 of the terminal pad group P through a fifth grounding line L52, the fifth grounding pad R52 is used to be welded to the grounding pin of the thermistor, so that the thermistor can be reliably grounded through the fifth grounding pad R52 and the fifth grounding line L52, and the resistance value of the fifth grounding line L52 will not affect the resistance value measurement of the thermistor.

[0048] In an embodiment of the utility model, a battery temperature acquisition circuit board of the utility model may further include a sixth resistor pad group R6 arranged on the front side of the substrate S, and the sixth resistor pad group R6 is also used to connect with the thermistor so that the battery temperature acquisition circuit board of the utility model can connect more thermistors; the distance between the sixth resistor pad group R6 and the terminal pad group P is greater than the distance between the first resistor pad group R1 and the terminal pad group P, and the sixth resistor pad group R6 includes two adjacently arranged sixth acquisition pads R61, and the two sixth acquisition pads R61 are also used to be welded to the two ends of the thermistor, and the two sixth acquisition pads R61 are respectively connected one-to-one with the two terminal pads P1 of the terminal pad group P through the sixth acquisition line L61; the sixth acquisition The length of the collection line L61 is 2.5 times the length of the first collection line L11. The sixth collection line L61 is divided into two parts. The length of the first part of the sixth collection line L61 is 8 / 25 of the total length of the sixth collection line L61. The width of the first part of the sixth collection line L61 is the same as the width of the first collection line L11. The length of the second part of the sixth collection line L61 is 17 / 25 of the total length of the sixth collection line L61. The width of the second part of the sixth collection line L61 is five times the width of the first collection line L11. In this way, the utility model can make the sixth collection line L61 have the same loop resistance as the first collection line L11 by widening the second part of the sixth collection line L61.

[0049] In an embodiment of the utility model, the sixth resistance pad group R6 may further include a sixth grounding pad R62 adjacent to the sixth collection pad R61, the sixth grounding pad R62 is one-to-one connected to a terminal pad P1 of the terminal pad group P through a sixth grounding line L62, the sixth grounding pad R62 is used to be welded to the grounding pin of the thermistor, so that the thermistor can be reliably grounded through the sixth grounding pad R62 and the sixth grounding line L62, and the resistance value of the sixth grounding line L62 will not affect the resistance value measurement of the thermistor.

[0050] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A battery temperature acquisition circuit board, characterized in that: It includes a substrate, and a terminal pad group, a first resistance pad group, and a second resistance pad group arranged on the front side of the substrate; The terminal pad group includes a plurality of terminal pads arranged side by side. The first resistance pad group includes two first collection pads arranged adjacent to each other, and the two first collection pads are connected one-to-one with the two terminal pads of the terminal pad group through the first collection circuit respectively. The second resistance pad group includes two second collection pads arranged adjacent to each other, and the two second collection pads are connected one-to-one with the two terminal pads of the terminal pad group through the second collection circuit respectively. The distance between the second resistance pad group and the terminal pad group is smaller than the distance between the first resistance pad group and the terminal pad group. The second acquisition line is arranged in an "S" shape, and the length of the second acquisition line is the same as the length of the first acquisition line, and the width of the second acquisition line is the same as the width of the first acquisition line.

2. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: The first resistance pad group further includes a first ground pad adjacent to the first collection pad, the first ground pad being connected one-to-one with a terminal pad of the terminal pad group through a first ground line; The second resistance pad group further includes a second ground pad adjacent to the second collection pad, and the second ground pad is connected one-to-one with a terminal pad of the terminal pad group through a second ground line.

3. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: It also includes a third resistor pad group arranged on the front side of the substrate; the distance between the third resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the third resistor pad group includes two third collection pads arranged adjacent to each other, and the two third collection pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a third collection circuit; The length of the third acquisition line is 1.4 times the length of the first acquisition line. The third acquisition line is divided into two parts. The length of the first part of the third acquisition line is four-sevenths of the total length of the third acquisition line. The width of the first part of the third acquisition line is the same as the width of the first acquisition line. The length of the second part of the third acquisition line is three-sevenths of the total length of the third acquisition line. The width of the second part of the third acquisition line is three times the width of the first acquisition line.

4. A battery temperature acquisition circuit board as claimed in claim 3, characterized in that: The third resistance pad group further includes a third ground pad adjacent to the third collection pad, and the third ground pad is connected one-to-one with a terminal pad of the terminal pad group through a third ground line.

5. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: It also includes a fourth resistor pad group arranged on the front side of the substrate; the distance between the fourth resistor pad group and the terminal pad group is greater than the distance between the first resistor pad group and the terminal pad group, the fourth resistor pad group includes two adjacently arranged fourth collection pads, and the two fourth collection pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a fourth collection circuit; The length of the fourth acquisition line is 1.7 times the length of the first acquisition line. The fourth acquisition line is divided into two parts. The length of the first part of the fourth acquisition line is three-seventeenths of the total length of the fourth acquisition line. The width of the first part of the fourth acquisition line is the same as the width of the first acquisition line. The length of the second part of the fourth acquisition line is fourteen-seventeenths of the total length of the fourth acquisition line. The width of the second part of the fourth acquisition line is three times the width of the first acquisition line.

6. A battery temperature acquisition circuit board as claimed in claim 5, characterized in that: The fourth resistance pad group further includes a fourth ground pad adjacent to the fourth collection pad, and the fourth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a fourth ground line.

7. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: It also includes a fifth resistance pad group arranged on the front side of the substrate; the distance between the fifth resistance pad group and the terminal pad group is greater than the distance between the first resistance pad group and the terminal pad group, the fifth resistance pad group includes two fifth acquisition pads arranged adjacent to each other, and the two fifth acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a fifth acquisition circuit; The length of the fifth acquisition line is two and a half times the length of the first acquisition line. The fifth acquisition line is divided into two parts. The length of the first part of the fifth acquisition line is one seventh of the total length of the fifth acquisition line. The width of the first part of the fifth acquisition line is the same as the width of the first acquisition line. The length of the second part of the fifth acquisition line is six sevenths of the total length of the fifth acquisition line. The width of the second part of the fifth acquisition line is five times the width of the first acquisition line.

8. A battery temperature acquisition circuit board as claimed in claim 7, characterized in that: The fifth resistance pad group further includes a fifth ground pad adjacent to the fifth collection pad, and the fifth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a fifth ground line.

9. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: It also includes a sixth resistance pad group arranged on the front side of the substrate; the distance between the sixth resistance pad group and the terminal pad group is greater than the distance between the first resistance pad group and the terminal pad group, the sixth resistance pad group includes two sixth acquisition pads arranged adjacent to each other, and the two sixth acquisition pads are respectively connected one-to-one with the two terminal pads of the terminal pad group through a sixth acquisition circuit; The length of the sixth acquisition line is 2.5 times the length of the first acquisition line. The sixth acquisition line is divided into two parts. The length of the first part of the sixth acquisition line is 8 / 25 of the total length of the sixth acquisition line. The width of the first part of the sixth acquisition line is the same as the width of the first acquisition line. The length of the second part of the sixth acquisition line is 17 / 25 of the total length of the sixth acquisition line. The width of the second part of the sixth acquisition line is five times the width of the first acquisition line.

10. A battery temperature acquisition circuit board as claimed in claim 9, characterized in that: The sixth resistance pad group further includes a sixth ground pad adjacent to the sixth collection pad, and the sixth ground pad is connected one-to-one with a terminal pad of the terminal pad group through a sixth ground line.

11. A battery temperature acquisition circuit board as claimed in claim 1, characterized in that: The substrate is a flexible structure.

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